drivers/gpu/drm/i915/intel_display.c

   1 /*
   2  * Copyright © 2006-2007 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *      Eric Anholt <eric@anholt.net>
  25  */
  26
  27 #include <linux/dmi.h>
  28 #include <linux/module.h>
  29 #include <linux/input.h>
  30 #include <linux/i2c.h>
  31 #include <linux/kernel.h>
  32 #include <linux/slab.h>
  33 #include <linux/vgaarb.h>
  34 #include <drm/drm_edid.h>
  35 #include <drm/drmP.h>
  36 #include "intel_drv.h"
  37 #include <drm/i915_drm.h>
  38 #include "i915_drv.h"
  39 #include "i915_trace.h"
  40 #include <drm/drm_dp_helper.h>
  41 #include <drm/drm_crtc_helper.h>
  42 #include <linux/dma_remapping.h>
  43
  44 bool intel_pipe_has_type(struct drm_crtc *crtc, int type);
  45 static void intel_increase_pllclock(struct drm_crtc *crtc);
  46 static void intel_crtc_update_cursor(struct drm_crtc *crtc, bool on);
  47
  48 static void i9xx_crtc_clock_get(struct intel_crtc *crtc,
  49                                 struct intel_crtc_config *pipe_config);
  50 static void ironlake_crtc_clock_get(struct intel_crtc *crtc,
  51                                     struct intel_crtc_config *pipe_config);
  52
  53 static int intel_set_mode(struct drm_crtc *crtc, struct drm_display_mode *mode,
  54                           int x, int y, struct drm_framebuffer *old_fb);
  55
  56
  57 typedef struct {
  58         int     min, max;
  59 } intel_range_t;
  60
  61 typedef struct {
  62         int     dot_limit;
  63         int     p2_slow, p2_fast;
  64 } intel_p2_t;
  65
  66 typedef struct intel_limit intel_limit_t;
  67 struct intel_limit {
  68         intel_range_t   dot, vco, n, m, m1, m2, p, p1;
  69         intel_p2_t          p2;
  70 };
  71
  72 /* FDI */
  73 #define IRONLAKE_FDI_FREQ               2700000 /* in kHz for mode->clock */
  74
  75 int
  76 intel_pch_rawclk(struct drm_device *dev)
  77 {
  78         struct drm_i915_private *dev_priv = dev->dev_private;
  79
  80         WARN_ON(!HAS_PCH_SPLIT(dev));
  81
  82         return I915_READ(PCH_RAWCLK_FREQ) & RAWCLK_FREQ_MASK;
  83 }
  84
  85 static inline u32 /* units of 100MHz */
  86 intel_fdi_link_freq(struct drm_device *dev)
  87 {
  88         if (IS_GEN5(dev)) {
  89                 struct drm_i915_private *dev_priv = dev->dev_private;
  90                 return (I915_READ(FDI_PLL_BIOS_0) & FDI_PLL_FB_CLOCK_MASK) + 2;
  91         } else
  92                 return 27;
  93 }
  94
  95 static const intel_limit_t intel_limits_i8xx_dac = {
  96         .dot = { .min = 25000, .max = 350000 },
  97         .vco = { .min = 930000, .max = 1400000 },
  98         .n = { .min = 3, .max = 16 },
  99         .m = { .min = 96, .max = 140 },
 100         .m1 = { .min = 18, .max = 26 },
 101         .m2 = { .min = 6, .max = 16 },
 102         .p = { .min = 4, .max = 128 },
 103         .p1 = { .min = 2, .max = 33 },
 104         .p2 = { .dot_limit = 165000,
 105                 .p2_slow = 4, .p2_fast = 2 },
 106 };
 107
 108 static const intel_limit_t intel_limits_i8xx_dvo = {
 109         .dot = { .min = 25000, .max = 350000 },
 110         .vco = { .min = 930000, .max = 1400000 },
 111         .n = { .min = 3, .max = 16 },
 112         .m = { .min = 96, .max = 140 },
 113         .m1 = { .min = 18, .max = 26 },
 114         .m2 = { .min = 6, .max = 16 },
 115         .p = { .min = 4, .max = 128 },
 116         .p1 = { .min = 2, .max = 33 },
 117         .p2 = { .dot_limit = 165000,
 118                 .p2_slow = 4, .p2_fast = 4 },
 119 };
 120
 121 static const intel_limit_t intel_limits_i8xx_lvds = {
 122         .dot = { .min = 25000, .max = 350000 },
 123         .vco = { .min = 930000, .max = 1400000 },
 124         .n = { .min = 3, .max = 16 },
 125         .m = { .min = 96, .max = 140 },
 126         .m1 = { .min = 18, .max = 26 },
 127         .m2 = { .min = 6, .max = 16 },
 128         .p = { .min = 4, .max = 128 },
 129         .p1 = { .min = 1, .max = 6 },
 130         .p2 = { .dot_limit = 165000,
 131                 .p2_slow = 14, .p2_fast = 7 },
 132 };
 133
 134 static const intel_limit_t intel_limits_i9xx_sdvo = {
 135         .dot = { .min = 20000, .max = 400000 },
 136         .vco = { .min = 1400000, .max = 2800000 },
 137         .n = { .min = 1, .max = 6 },
 138         .m = { .min = 70, .max = 120 },
 139         .m1 = { .min = 8, .max = 18 },
 140         .m2 = { .min = 3, .max = 7 },
 141         .p = { .min = 5, .max = 80 },
 142         .p1 = { .min = 1, .max = 8 },
 143         .p2 = { .dot_limit = 200000,
 144                 .p2_slow = 10, .p2_fast = 5 },
 145 };
 146
 147 static const intel_limit_t intel_limits_i9xx_lvds = {
 148         .dot = { .min = 20000, .max = 400000 },
 149         .vco = { .min = 1400000, .max = 2800000 },
 150         .n = { .min = 1, .max = 6 },
 151         .m = { .min = 70, .max = 120 },
 152         .m1 = { .min = 8, .max = 18 },
 153         .m2 = { .min = 3, .max = 7 },
 154         .p = { .min = 7, .max = 98 },
 155         .p1 = { .min = 1, .max = 8 },
 156         .p2 = { .dot_limit = 112000,
 157                 .p2_slow = 14, .p2_fast = 7 },
 158 };
 159
 160
 161 static const intel_limit_t intel_limits_g4x_sdvo = {
 162         .dot = { .min = 25000, .max = 270000 },
 163         .vco = { .min = 1750000, .max = 3500000},
 164         .n = { .min = 1, .max = 4 },
 165         .m = { .min = 104, .max = 138 },
 166         .m1 = { .min = 17, .max = 23 },
 167         .m2 = { .min = 5, .max = 11 },
 168         .p = { .min = 10, .max = 30 },
 169         .p1 = { .min = 1, .max = 3},
 170         .p2 = { .dot_limit = 270000,
 171                 .p2_slow = 10,
 172                 .p2_fast = 10
 173         },
 174 };
 175
 176 static const intel_limit_t intel_limits_g4x_hdmi = {
 177         .dot = { .min = 22000, .max = 400000 },
 178         .vco = { .min = 1750000, .max = 3500000},
 179         .n = { .min = 1, .max = 4 },
 180         .m = { .min = 104, .max = 138 },
 181         .m1 = { .min = 16, .max = 23 },
 182         .m2 = { .min = 5, .max = 11 },
 183         .p = { .min = 5, .max = 80 },
 184         .p1 = { .min = 1, .max = 8},
 185         .p2 = { .dot_limit = 165000,
 186                 .p2_slow = 10, .p2_fast = 5 },
 187 };
 188
 189 static const intel_limit_t intel_limits_g4x_single_channel_lvds = {
 190         .dot = { .min = 20000, .max = 115000 },
 191         .vco = { .min = 1750000, .max = 3500000 },
 192         .n = { .min = 1, .max = 3 },
 193         .m = { .min = 104, .max = 138 },
 194         .m1 = { .min = 17, .max = 23 },
 195         .m2 = { .min = 5, .max = 11 },
 196         .p = { .min = 28, .max = 112 },
 197         .p1 = { .min = 2, .max = 8 },
 198         .p2 = { .dot_limit = 0,
 199                 .p2_slow = 14, .p2_fast = 14
 200         },
 201 };
 202
 203 static const intel_limit_t intel_limits_g4x_dual_channel_lvds = {
 204         .dot = { .min = 80000, .max = 224000 },
 205         .vco = { .min = 1750000, .max = 3500000 },
 206         .n = { .min = 1, .max = 3 },
 207         .m = { .min = 104, .max = 138 },
 208         .m1 = { .min = 17, .max = 23 },
 209         .m2 = { .min = 5, .max = 11 },
 210         .p = { .min = 14, .max = 42 },
 211         .p1 = { .min = 2, .max = 6 },
 212         .p2 = { .dot_limit = 0,
 213                 .p2_slow = 7, .p2_fast = 7
 214         },
 215 };
 216
 217 static const intel_limit_t intel_limits_pineview_sdvo = {
 218         .dot = { .min = 20000, .max = 400000},
 219         .vco = { .min = 1700000, .max = 3500000 },
 220         /* Pineview's Ncounter is a ring counter */
 221         .n = { .min = 3, .max = 6 },
 222         .m = { .min = 2, .max = 256 },
 223         /* Pineview only has one combined m divider, which we treat as m2. */
 224         .m1 = { .min = 0, .max = 0 },
 225         .m2 = { .min = 0, .max = 254 },
 226         .p = { .min = 5, .max = 80 },
 227         .p1 = { .min = 1, .max = 8 },
 228         .p2 = { .dot_limit = 200000,
 229                 .p2_slow = 10, .p2_fast = 5 },
 230 };
 231
 232 static const intel_limit_t intel_limits_pineview_lvds = {
 233         .dot = { .min = 20000, .max = 400000 },
 234         .vco = { .min = 1700000, .max = 3500000 },
 235         .n = { .min = 3, .max = 6 },
 236         .m = { .min = 2, .max = 256 },
 237         .m1 = { .min = 0, .max = 0 },
 238         .m2 = { .min = 0, .max = 254 },
 239         .p = { .min = 7, .max = 112 },
 240         .p1 = { .min = 1, .max = 8 },
 241         .p2 = { .dot_limit = 112000,
 242                 .p2_slow = 14, .p2_fast = 14 },
 243 };
 244
 245 /* Ironlake / Sandybridge
 246  *
 247  * We calculate clock using (register_value + 2) for N/M1/M2, so here
 248  * the range value for them is (actual_value - 2).
 249  */
 250 static const intel_limit_t intel_limits_ironlake_dac = {
 251         .dot = { .min = 25000, .max = 350000 },
 252         .vco = { .min = 1760000, .max = 3510000 },
 253         .n = { .min = 1, .max = 5 },
 254         .m = { .min = 79, .max = 127 },
 255         .m1 = { .min = 12, .max = 22 },
 256         .m2 = { .min = 5, .max = 9 },
 257         .p = { .min = 5, .max = 80 },
 258         .p1 = { .min = 1, .max = 8 },
 259         .p2 = { .dot_limit = 225000,
 260                 .p2_slow = 10, .p2_fast = 5 },
 261 };
 262
 263 static const intel_limit_t intel_limits_ironlake_single_lvds = {
 264         .dot = { .min = 25000, .max = 350000 },
 265         .vco = { .min = 1760000, .max = 3510000 },
 266         .n = { .min = 1, .max = 3 },
 267         .m = { .min = 79, .max = 118 },
 268         .m1 = { .min = 12, .max = 22 },
 269         .m2 = { .min = 5, .max = 9 },
 270         .p = { .min = 28, .max = 112 },
 271         .p1 = { .min = 2, .max = 8 },
 272         .p2 = { .dot_limit = 225000,
 273                 .p2_slow = 14, .p2_fast = 14 },
 274 };
 275
 276 static const intel_limit_t intel_limits_ironlake_dual_lvds = {
 277         .dot = { .min = 25000, .max = 350000 },
 278         .vco = { .min = 1760000, .max = 3510000 },
 279         .n = { .min = 1, .max = 3 },
 280         .m = { .min = 79, .max = 127 },
 281         .m1 = { .min = 12, .max = 22 },
 282         .m2 = { .min = 5, .max = 9 },
 283         .p = { .min = 14, .max = 56 },
 284         .p1 = { .min = 2, .max = 8 },
 285         .p2 = { .dot_limit = 225000,
 286                 .p2_slow = 7, .p2_fast = 7 },
 287 };
 288
 289 /* LVDS 100mhz refclk limits. */
 290 static const intel_limit_t intel_limits_ironlake_single_lvds_100m = {
 291         .dot = { .min = 25000, .max = 350000 },
 292         .vco = { .min = 1760000, .max = 3510000 },
 293         .n = { .min = 1, .max = 2 },
 294         .m = { .min = 79, .max = 126 },
 295         .m1 = { .min = 12, .max = 22 },
 296         .m2 = { .min = 5, .max = 9 },
 297         .p = { .min = 28, .max = 112 },
 298         .p1 = { .min = 2, .max = 8 },
 299         .p2 = { .dot_limit = 225000,
 300                 .p2_slow = 14, .p2_fast = 14 },
 301 };
 302
 303 static const intel_limit_t intel_limits_ironlake_dual_lvds_100m = {
 304         .dot = { .min = 25000, .max = 350000 },
 305         .vco = { .min = 1760000, .max = 3510000 },
 306         .n = { .min = 1, .max = 3 },
 307         .m = { .min = 79, .max = 126 },
 308         .m1 = { .min = 12, .max = 22 },
 309         .m2 = { .min = 5, .max = 9 },
 310         .p = { .min = 14, .max = 42 },
 311         .p1 = { .min = 2, .max = 6 },
 312         .p2 = { .dot_limit = 225000,
 313                 .p2_slow = 7, .p2_fast = 7 },
 314 };
 315
 316 static const intel_limit_t intel_limits_vlv_dac = {
 317         .dot = { .min = 25000, .max = 270000 },
 318         .vco = { .min = 4000000, .max = 6000000 },
 319         .n = { .min = 1, .max = 7 },
 320         .m = { .min = 22, .max = 450 }, /* guess */
 321         .m1 = { .min = 2, .max = 3 },
 322         .m2 = { .min = 11, .max = 156 },
 323         .p = { .min = 10, .max = 30 },
 324         .p1 = { .min = 1, .max = 3 },
 325         .p2 = { .dot_limit = 270000,
 326                 .p2_slow = 2, .p2_fast = 20 },
 327 };
 328
 329 static const intel_limit_t intel_limits_vlv_hdmi = {
 330         .dot = { .min = 25000, .max = 270000 },
 331         .vco = { .min = 4000000, .max = 6000000 },
 332         .n = { .min = 1, .max = 7 },
 333         .m = { .min = 60, .max = 300 }, /* guess */
 334         .m1 = { .min = 2, .max = 3 },
 335         .m2 = { .min = 11, .max = 156 },
 336         .p = { .min = 10, .max = 30 },
 337         .p1 = { .min = 2, .max = 3 },
 338         .p2 = { .dot_limit = 270000,
 339                 .p2_slow = 2, .p2_fast = 20 },
 340 };
 341
 342 static const intel_limit_t intel_limits_vlv_dp = {
 343         .dot = { .min = 25000, .max = 270000 },
 344         .vco = { .min = 4000000, .max = 6000000 },
 345         .n = { .min = 1, .max = 7 },
 346         .m = { .min = 22, .max = 450 },
 347         .m1 = { .min = 2, .max = 3 },
 348         .m2 = { .min = 11, .max = 156 },
 349         .p = { .min = 10, .max = 30 },
 350         .p1 = { .min = 1, .max = 3 },
 351         .p2 = { .dot_limit = 270000,
 352                 .p2_slow = 2, .p2_fast = 20 },
 353 };
 354
 355 static const intel_limit_t *intel_ironlake_limit(struct drm_crtc *crtc,
 356                                                 int refclk)
 357 {
 358         struct drm_device *dev = crtc->dev;
 359         const intel_limit_t *limit;
 360
 361         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 362                 if (intel_is_dual_link_lvds(dev)) {
 363                         if (refclk == 100000)
 364                                 limit = &intel_limits_ironlake_dual_lvds_100m;
 365                         else
 366                                 limit = &intel_limits_ironlake_dual_lvds;
 367                 } else {
 368                         if (refclk == 100000)
 369                                 limit = &intel_limits_ironlake_single_lvds_100m;
 370                         else
 371                                 limit = &intel_limits_ironlake_single_lvds;
 372                 }
 373         } else
 374                 limit = &intel_limits_ironlake_dac;
 375
 376         return limit;
 377 }
 378
 379 static const intel_limit_t *intel_g4x_limit(struct drm_crtc *crtc)
 380 {
 381         struct drm_device *dev = crtc->dev;
 382         const intel_limit_t *limit;
 383
 384         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 385                 if (intel_is_dual_link_lvds(dev))
 386                         limit = &intel_limits_g4x_dual_channel_lvds;
 387                 else
 388                         limit = &intel_limits_g4x_single_channel_lvds;
 389         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI) ||
 390                    intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG)) {
 391                 limit = &intel_limits_g4x_hdmi;
 392         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO)) {
 393                 limit = &intel_limits_g4x_sdvo;
 394         } else /* The option is for other outputs */
 395                 limit = &intel_limits_i9xx_sdvo;
 396
 397         return limit;
 398 }
 399
 400 static const intel_limit_t *intel_limit(struct drm_crtc *crtc, int refclk)
 401 {
 402         struct drm_device *dev = crtc->dev;
 403         const intel_limit_t *limit;
 404
 405         if (HAS_PCH_SPLIT(dev))
 406                 limit = intel_ironlake_limit(crtc, refclk);
 407         else if (IS_G4X(dev)) {
 408                 limit = intel_g4x_limit(crtc);
 409         } else if (IS_PINEVIEW(dev)) {
 410                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
 411                         limit = &intel_limits_pineview_lvds;
 412                 else
 413                         limit = &intel_limits_pineview_sdvo;
 414         } else if (IS_VALLEYVIEW(dev)) {
 415                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG))
 416                         limit = &intel_limits_vlv_dac;
 417                 else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI))
 418                         limit = &intel_limits_vlv_hdmi;
 419                 else
 420                         limit = &intel_limits_vlv_dp;
 421         } else if (!IS_GEN2(dev)) {
 422                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
 423                         limit = &intel_limits_i9xx_lvds;
 424                 else
 425                         limit = &intel_limits_i9xx_sdvo;
 426         } else {
 427                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
 428                         limit = &intel_limits_i8xx_lvds;
 429                 else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DVO))
 430                         limit = &intel_limits_i8xx_dvo;
 431                 else
 432                         limit = &intel_limits_i8xx_dac;
 433         }
 434         return limit;
 435 }
 436
 437 /* m1 is reserved as 0 in Pineview, n is a ring counter */
 438 static void pineview_clock(int refclk, intel_clock_t *clock)
 439 {
 440         clock->m = clock->m2 + 2;
 441         clock->p = clock->p1 * clock->p2;
 442         clock->vco = refclk * clock->m / clock->n;
 443         clock->dot = clock->vco / clock->p;
 444 }
 445
 446 static uint32_t i9xx_dpll_compute_m(struct dpll *dpll)
 447 {
 448         return 5 * (dpll->m1 + 2) + (dpll->m2 + 2);
 449 }
 450
 451 static void i9xx_clock(int refclk, intel_clock_t *clock)
 452 {
 453         clock->m = i9xx_dpll_compute_m(clock);
 454         clock->p = clock->p1 * clock->p2;
 455         clock->vco = refclk * clock->m / (clock->n + 2);
 456         clock->dot = clock->vco / clock->p;
 457 }
 458
 459 /**
 460  * Returns whether any output on the specified pipe is of the specified type
 461  */
 462 bool intel_pipe_has_type(struct drm_crtc *crtc, int type)
 463 {
 464         struct drm_device *dev = crtc->dev;
 465         struct intel_encoder *encoder;
 466
 467         for_each_encoder_on_crtc(dev, crtc, encoder)
 468                 if (encoder->type == type)
 469                         return true;
 470
 471         return false;
 472 }
 473
 474 #define INTELPllInvalid(s)   do { /* DRM_DEBUG(s); */ return false; } while (0)
 475 /**
 476  * Returns whether the given set of divisors are valid for a given refclk with
 477  * the given connectors.
 478  */
 479
 480 static bool intel_PLL_is_valid(struct drm_device *dev,
 481                                const intel_limit_t *limit,
 482                                const intel_clock_t *clock)
 483 {
 484         if (clock->p1  < limit->p1.min  || limit->p1.max  < clock->p1)
 485                 INTELPllInvalid("p1 out of range\n");
 486         if (clock->p   < limit->p.min   || limit->p.max   < clock->p)
 487                 INTELPllInvalid("p out of range\n");
 488         if (clock->m2  < limit->m2.min  || limit->m2.max  < clock->m2)
 489                 INTELPllInvalid("m2 out of range\n");
 490         if (clock->m1  < limit->m1.min  || limit->m1.max  < clock->m1)
 491                 INTELPllInvalid("m1 out of range\n");
 492         if (clock->m1 <= clock->m2 && !IS_PINEVIEW(dev))
 493                 INTELPllInvalid("m1 <= m2\n");
 494         if (clock->m   < limit->m.min   || limit->m.max   < clock->m)
 495                 INTELPllInvalid("m out of range\n");
 496         if (clock->n   < limit->n.min   || limit->n.max   < clock->n)
 497                 INTELPllInvalid("n out of range\n");
 498         if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
 499                 INTELPllInvalid("vco out of range\n");
 500         /* XXX: We may need to be checking "Dot clock" depending on the multiplier,
 501          * connector, etc., rather than just a single range.
 502          */
 503         if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
 504                 INTELPllInvalid("dot out of range\n");
 505
 506         return true;
 507 }
 508
 509 static bool
 510 i9xx_find_best_dpll(const intel_limit_t *limit, struct drm_crtc *crtc,
 511                     int target, int refclk, intel_clock_t *match_clock,
 512                     intel_clock_t *best_clock)
 513 {
 514         struct drm_device *dev = crtc->dev;
 515         intel_clock_t clock;
 516         int err = target;
 517
 518         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 519                 /*
 520                  * For LVDS just rely on its current settings for dual-channel.
 521                  * We haven't figured out how to reliably set up different
 522                  * single/dual channel state, if we even can.
 523                  */
 524                 if (intel_is_dual_link_lvds(dev))
 525                         clock.p2 = limit->p2.p2_fast;
 526                 else
 527                         clock.p2 = limit->p2.p2_slow;
 528         } else {
 529                 if (target < limit->p2.dot_limit)
 530                         clock.p2 = limit->p2.p2_slow;
 531                 else
 532                         clock.p2 = limit->p2.p2_fast;
 533         }
 534
 535         memset(best_clock, 0, sizeof(*best_clock));
 536
 537         for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max;
 538              clock.m1++) {
 539                 for (clock.m2 = limit->m2.min;
 540                      clock.m2 <= limit->m2.max; clock.m2++) {
 541                         if (clock.m2 >= clock.m1)
 542                                 break;
 543                         for (clock.n = limit->n.min;
 544                              clock.n <= limit->n.max; clock.n++) {
 545                                 for (clock.p1 = limit->p1.min;
 546                                         clock.p1 <= limit->p1.max; clock.p1++) {
 547                                         int this_err;
 548
 549                                         i9xx_clock(refclk, &clock);
 550                                         if (!intel_PLL_is_valid(dev, limit,
 551                                                                 &clock))
 552                                                 continue;
 553                                         if (match_clock &&
 554                                             clock.p != match_clock->p)
 555                                                 continue;
 556
 557                                         this_err = abs(clock.dot - target);
 558                                         if (this_err < err) {
 559                                                 *best_clock = clock;
 560                                                 err = this_err;
 561                                         }
 562                                 }
 563                         }
 564                 }
 565         }
 566
 567         return (err != target);
 568 }
 569
 570 static bool
 571 pnv_find_best_dpll(const intel_limit_t *limit, struct drm_crtc *crtc,
 572                    int target, int refclk, intel_clock_t *match_clock,
 573                    intel_clock_t *best_clock)
 574 {
 575         struct drm_device *dev = crtc->dev;
 576         intel_clock_t clock;
 577         int err = target;
 578
 579         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 580                 /*
 581                  * For LVDS just rely on its current settings for dual-channel.
 582                  * We haven't figured out how to reliably set up different
 583                  * single/dual channel state, if we even can.
 584                  */
 585                 if (intel_is_dual_link_lvds(dev))
 586                         clock.p2 = limit->p2.p2_fast;
 587                 else
 588                         clock.p2 = limit->p2.p2_slow;
 589         } else {
 590                 if (target < limit->p2.dot_limit)
 591                         clock.p2 = limit->p2.p2_slow;
 592                 else
 593                         clock.p2 = limit->p2.p2_fast;
 594         }
 595
 596         memset(best_clock, 0, sizeof(*best_clock));
 597
 598         for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max;
 599              clock.m1++) {
 600                 for (clock.m2 = limit->m2.min;
 601                      clock.m2 <= limit->m2.max; clock.m2++) {
 602                         for (clock.n = limit->n.min;
 603                              clock.n <= limit->n.max; clock.n++) {
 604                                 for (clock.p1 = limit->p1.min;
 605                                         clock.p1 <= limit->p1.max; clock.p1++) {
 606                                         int this_err;
 607
 608                                         pineview_clock(refclk, &clock);
 609                                         if (!intel_PLL_is_valid(dev, limit,
 610                                                                 &clock))
 611                                                 continue;
 612                                         if (match_clock &&
 613                                             clock.p != match_clock->p)
 614                                                 continue;
 615
 616                                         this_err = abs(clock.dot - target);
 617                                         if (this_err < err) {
 618                                                 *best_clock = clock;
 619                                                 err = this_err;
 620                                         }
 621                                 }
 622                         }
 623                 }
 624         }
 625
 626         return (err != target);
 627 }
 628
 629 static bool
 630 g4x_find_best_dpll(const intel_limit_t *limit, struct drm_crtc *crtc,
 631                    int target, int refclk, intel_clock_t *match_clock,
 632                    intel_clock_t *best_clock)
 633 {
 634         struct drm_device *dev = crtc->dev;
 635         intel_clock_t clock;
 636         int max_n;
 637         bool found;
 638         /* approximately equals target * 0.00585 */
 639         int err_most = (target >> 8) + (target >> 9);
 640         found = false;
 641
 642         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 643                 if (intel_is_dual_link_lvds(dev))
 644                         clock.p2 = limit->p2.p2_fast;
 645                 else
 646                         clock.p2 = limit->p2.p2_slow;
 647         } else {
 648                 if (target < limit->p2.dot_limit)
 649                         clock.p2 = limit->p2.p2_slow;
 650                 else
 651                         clock.p2 = limit->p2.p2_fast;
 652         }
 653
 654         memset(best_clock, 0, sizeof(*best_clock));
 655         max_n = limit->n.max;
 656         /* based on hardware requirement, prefer smaller n to precision */
 657         for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
 658                 /* based on hardware requirement, prefere larger m1,m2 */
 659                 for (clock.m1 = limit->m1.max;
 660                      clock.m1 >= limit->m1.min; clock.m1--) {
 661                         for (clock.m2 = limit->m2.max;
 662                              clock.m2 >= limit->m2.min; clock.m2--) {
 663                                 for (clock.p1 = limit->p1.max;
 664                                      clock.p1 >= limit->p1.min; clock.p1--) {
 665                                         int this_err;
 666
 667                                         i9xx_clock(refclk, &clock);
 668                                         if (!intel_PLL_is_valid(dev, limit,
 669                                                                 &clock))
 670                                                 continue;
 671
 672                                         this_err = abs(clock.dot - target);
 673                                         if (this_err < err_most) {
 674                                                 *best_clock = clock;
 675                                                 err_most = this_err;
 676                                                 max_n = clock.n;
 677                                                 found = true;
 678                                         }
 679                                 }
 680                         }
 681                 }
 682         }
 683         return found;
 684 }
 685
 686 static bool
 687 vlv_find_best_dpll(const intel_limit_t *limit, struct drm_crtc *crtc,
 688                    int target, int refclk, intel_clock_t *match_clock,
 689                    intel_clock_t *best_clock)
 690 {
 691         u32 p1, p2, m1, m2, vco, bestn, bestm1, bestm2, bestp1, bestp2;
 692         u32 m, n, fastclk;
 693         u32 updrate, minupdate, p;
 694         unsigned long bestppm, ppm, absppm;
 695         int dotclk, flag;
 696
 697         flag = 0;
 698         dotclk = target * 1000;
 699         bestppm = 1000000;
 700         ppm = absppm = 0;
 701         fastclk = dotclk / (2*100);
 702         updrate = 0;
 703         minupdate = 19200;
 704         n = p = p1 = p2 = m = m1 = m2 = vco = bestn = 0;
 705         bestm1 = bestm2 = bestp1 = bestp2 = 0;
 706
 707         /* based on hardware requirement, prefer smaller n to precision */
 708         for (n = limit->n.min; n <= ((refclk) / minupdate); n++) {
 709                 updrate = refclk / n;
 710                 for (p1 = limit->p1.max; p1 > limit->p1.min; p1--) {
 711                         for (p2 = limit->p2.p2_fast+1; p2 > 0; p2--) {
 712                                 if (p2 > 10)
 713                                         p2 = p2 - 1;
 714                                 p = p1 * p2;
 715                                 /* based on hardware requirement, prefer bigger m1,m2 values */
 716                                 for (m1 = limit->m1.min; m1 <= limit->m1.max; m1++) {
 717                                         m2 = (((2*(fastclk * p * n / m1 )) +
 718                                                refclk) / (2*refclk));
 719                                         m = m1 * m2;
 720                                         vco = updrate * m;
 721                                         if (vco >= limit->vco.min && vco < limit->vco.max) {
 722                                                 ppm = 1000000 * ((vco / p) - fastclk) / fastclk;
 723                                                 absppm = (ppm > 0) ? ppm : (-ppm);
 724                                                 if (absppm < 100 && ((p1 * p2) > (bestp1 * bestp2))) {
 725                                                         bestppm = 0;
 726                                                         flag = 1;
 727                                                 }
 728                                                 if (absppm < bestppm - 10) {
 729                                                         bestppm = absppm;
 730                                                         flag = 1;
 731                                                 }
 732                                                 if (flag) {
 733                                                         bestn = n;
 734                                                         bestm1 = m1;
 735                                                         bestm2 = m2;
 736                                                         bestp1 = p1;
 737                                                         bestp2 = p2;
 738                                                         flag = 0;
 739                                                 }
 740                                         }
 741                                 }
 742                         }
 743                 }
 744         }
 745         best_clock->n = bestn;
 746         best_clock->m1 = bestm1;
 747         best_clock->m2 = bestm2;
 748         best_clock->p1 = bestp1;
 749         best_clock->p2 = bestp2;
 750
 751         return true;
 752 }
 753
 754 enum transcoder intel_pipe_to_cpu_transcoder(struct drm_i915_private *dev_priv,
 755                                              enum pipe pipe)
 756 {
 757         struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
 758         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 759
 760         return intel_crtc->config.cpu_transcoder;
 761 }
 762
 763 static void ironlake_wait_for_vblank(struct drm_device *dev, int pipe)
 764 {
 765         struct drm_i915_private *dev_priv = dev->dev_private;
 766         u32 frame, frame_reg = PIPEFRAME(pipe);
 767
 768         frame = I915_READ(frame_reg);
 769
 770         if (wait_for(I915_READ_NOTRACE(frame_reg) != frame, 50))
 771                 DRM_DEBUG_KMS("vblank wait timed out\n");
 772 }
 773
 774 /**
 775  * intel_wait_for_vblank - wait for vblank on a given pipe
 776  * @dev: drm device
 777  * @pipe: pipe to wait for
 778  *
 779  * Wait for vblank to occur on a given pipe.  Needed for various bits of
 780  * mode setting code.
 781  */
 782 void intel_wait_for_vblank(struct drm_device *dev, int pipe)
 783 {
 784         struct drm_i915_private *dev_priv = dev->dev_private;
 785         int pipestat_reg = PIPESTAT(pipe);
 786
 787         if (INTEL_INFO(dev)->gen >= 5) {
 788                 ironlake_wait_for_vblank(dev, pipe);
 789                 return;
 790         }
 791
 792         /* Clear existing vblank status. Note this will clear any other
 793          * sticky status fields as well.
 794          *
 795          * This races with i915_driver_irq_handler() with the result
 796          * that either function could miss a vblank event.  Here it is not
 797          * fatal, as we will either wait upon the next vblank interrupt or
 798          * timeout.  Generally speaking intel_wait_for_vblank() is only
 799          * called during modeset at which time the GPU should be idle and
 800          * should *not* be performing page flips and thus not waiting on
 801          * vblanks...
 802          * Currently, the result of us stealing a vblank from the irq
 803          * handler is that a single frame will be skipped during swapbuffers.
 804          */
 805         I915_WRITE(pipestat_reg,
 806                    I915_READ(pipestat_reg) | PIPE_VBLANK_INTERRUPT_STATUS);
 807
 808         /* Wait for vblank interrupt bit to set */
 809         if (wait_for(I915_READ(pipestat_reg) &
 810                      PIPE_VBLANK_INTERRUPT_STATUS,
 811                      50))
 812                 DRM_DEBUG_KMS("vblank wait timed out\n");
 813 }
 814
 815 /*
 816  * intel_wait_for_pipe_off - wait for pipe to turn off
 817  * @dev: drm device
 818  * @pipe: pipe to wait for
 819  *
 820  * After disabling a pipe, we can't wait for vblank in the usual way,
 821  * spinning on the vblank interrupt status bit, since we won't actually
 822  * see an interrupt when the pipe is disabled.
 823  *
 824  * On Gen4 and above:
 825  *   wait for the pipe register state bit to turn off
 826  *
 827  * Otherwise:
 828  *   wait for the display line value to settle (it usually
 829  *   ends up stopping at the start of the next frame).
 830  *
 831  */
 832 void intel_wait_for_pipe_off(struct drm_device *dev, int pipe)
 833 {
 834         struct drm_i915_private *dev_priv = dev->dev_private;
 835         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
 836                                                                       pipe);
 837
 838         if (INTEL_INFO(dev)->gen >= 4) {
 839                 int reg = PIPECONF(cpu_transcoder);
 840
 841                 /* Wait for the Pipe State to go off */
 842                 if (wait_for((I915_READ(reg) & I965_PIPECONF_ACTIVE) == 0,
 843                              100))
 844                         WARN(1, "pipe_off wait timed out\n");
 845         } else {
 846                 u32 last_line, line_mask;
 847                 int reg = PIPEDSL(pipe);
 848                 unsigned long timeout = jiffies + msecs_to_jiffies(100);
 849
 850                 if (IS_GEN2(dev))
 851                         line_mask = DSL_LINEMASK_GEN2;
 852                 else
 853                         line_mask = DSL_LINEMASK_GEN3;
 854
 855                 /* Wait for the display line to settle */
 856                 do {
 857                         last_line = I915_READ(reg) & line_mask;
 858                         mdelay(5);
 859                 } while (((I915_READ(reg) & line_mask) != last_line) &&
 860                          time_after(timeout, jiffies));
 861                 if (time_after(jiffies, timeout))
 862                         WARN(1, "pipe_off wait timed out\n");
 863         }
 864 }
 865
 866 /*
 867  * ibx_digital_port_connected - is the specified port connected?
 868  * @dev_priv: i915 private structure
 869  * @port: the port to test
 870  *
 871  * Returns true if @port is connected, false otherwise.
 872  */
 873 bool ibx_digital_port_connected(struct drm_i915_private *dev_priv,
 874                                 struct intel_digital_port *port)
 875 {
 876         u32 bit;
 877
 878         if (HAS_PCH_IBX(dev_priv->dev)) {
 879                 switch(port->port) {
 880                 case PORT_B:
 881                         bit = SDE_PORTB_HOTPLUG;
 882                         break;
 883                 case PORT_C:
 884                         bit = SDE_PORTC_HOTPLUG;
 885                         break;
 886                 case PORT_D:
 887                         bit = SDE_PORTD_HOTPLUG;
 888                         break;
 889                 default:
 890                         return true;
 891                 }
 892         } else {
 893                 switch(port->port) {
 894                 case PORT_B:
 895                         bit = SDE_PORTB_HOTPLUG_CPT;
 896                         break;
 897                 case PORT_C:
 898                         bit = SDE_PORTC_HOTPLUG_CPT;
 899                         break;
 900                 case PORT_D:
 901                         bit = SDE_PORTD_HOTPLUG_CPT;
 902                         break;
 903                 default:
 904                         return true;
 905                 }
 906         }
 907
 908         return I915_READ(SDEISR) & bit;
 909 }
 910
 911 static const char *state_string(bool enabled)
 912 {
 913         return enabled ? "on" : "off";
 914 }
 915
 916 /* Only for pre-ILK configs */
 917 void assert_pll(struct drm_i915_private *dev_priv,
 918                 enum pipe pipe, bool state)
 919 {
 920         int reg;
 921         u32 val;
 922         bool cur_state;
 923
 924         reg = DPLL(pipe);
 925         val = I915_READ(reg);
 926         cur_state = !!(val & DPLL_VCO_ENABLE);
 927         WARN(cur_state != state,
 928              "PLL state assertion failure (expected %s, current %s)\n",
 929              state_string(state), state_string(cur_state));
 930 }
 931
 932 struct intel_shared_dpll *
 933 intel_crtc_to_shared_dpll(struct intel_crtc *crtc)
 934 {
 935         struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
 936
 937         if (crtc->config.shared_dpll < 0)
 938                 return NULL;
 939
 940         return &dev_priv->shared_dplls[crtc->config.shared_dpll];
 941 }
 942
 943 /* For ILK+ */
 944 void assert_shared_dpll(struct drm_i915_private *dev_priv,
 945                         struct intel_shared_dpll *pll,
 946                         bool state)
 947 {
 948         bool cur_state;
 949         struct intel_dpll_hw_state hw_state;
 950
 951         if (HAS_PCH_LPT(dev_priv->dev)) {
 952                 DRM_DEBUG_DRIVER("LPT detected: skipping PCH PLL test\n");
 953                 return;
 954         }
 955
 956         if (WARN (!pll,
 957                   "asserting DPLL %s with no DPLL\n", state_string(state)))
 958                 return;
 959
 960         cur_state = pll->get_hw_state(dev_priv, pll, &hw_state);
 961         WARN(cur_state != state,
 962              "%s assertion failure (expected %s, current %s)\n",
 963              pll->name, state_string(state), state_string(cur_state));
 964 }
 965
 966 static void assert_fdi_tx(struct drm_i915_private *dev_priv,
 967                           enum pipe pipe, bool state)
 968 {
 969         int reg;
 970         u32 val;
 971         bool cur_state;
 972         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
 973                                                                       pipe);
 974
 975         if (HAS_DDI(dev_priv->dev)) {
 976                 /* DDI does not have a specific FDI_TX register */
 977                 reg = TRANS_DDI_FUNC_CTL(cpu_transcoder);
 978                 val = I915_READ(reg);
 979                 cur_state = !!(val & TRANS_DDI_FUNC_ENABLE);
 980         } else {
 981                 reg = FDI_TX_CTL(pipe);
 982                 val = I915_READ(reg);
 983                 cur_state = !!(val & FDI_TX_ENABLE);
 984         }
 985         WARN(cur_state != state,
 986              "FDI TX state assertion failure (expected %s, current %s)\n",
 987              state_string(state), state_string(cur_state));
 988 }
 989 #define assert_fdi_tx_enabled(d, p) assert_fdi_tx(d, p, true)
 990 #define assert_fdi_tx_disabled(d, p) assert_fdi_tx(d, p, false)
 991
 992 static void assert_fdi_rx(struct drm_i915_private *dev_priv,
 993                           enum pipe pipe, bool state)
 994 {
 995         int reg;
 996         u32 val;
 997         bool cur_state;
 998
 999         reg = FDI_RX_CTL(pipe);
1000         val = I915_READ(reg);
1001         cur_state = !!(val & FDI_RX_ENABLE);
1002         WARN(cur_state != state,
1003              "FDI RX state assertion failure (expected %s, current %s)\n",
1004              state_string(state), state_string(cur_state));
1005 }
1006 #define assert_fdi_rx_enabled(d, p) assert_fdi_rx(d, p, true)
1007 #define assert_fdi_rx_disabled(d, p) assert_fdi_rx(d, p, false)
1008
1009 static void assert_fdi_tx_pll_enabled(struct drm_i915_private *dev_priv,
1010                                       enum pipe pipe)
1011 {
1012         int reg;
1013         u32 val;
1014
1015         /* ILK FDI PLL is always enabled */
1016         if (dev_priv->info->gen == 5)
1017                 return;
1018
1019         /* On Haswell, DDI ports are responsible for the FDI PLL setup */
1020         if (HAS_DDI(dev_priv->dev))
1021                 return;
1022
1023         reg = FDI_TX_CTL(pipe);
1024         val = I915_READ(reg);
1025         WARN(!(val & FDI_TX_PLL_ENABLE), "FDI TX PLL assertion failure, should be active but is disabled\n");
1026 }
1027
1028 void assert_fdi_rx_pll(struct drm_i915_private *dev_priv,
1029                        enum pipe pipe, bool state)
1030 {
1031         int reg;
1032         u32 val;
1033         bool cur_state;
1034
1035         reg = FDI_RX_CTL(pipe);
1036         val = I915_READ(reg);
1037         cur_state = !!(val & FDI_RX_PLL_ENABLE);
1038         WARN(cur_state != state,
1039              "FDI RX PLL assertion failure (expected %s, current %s)\n",
1040              state_string(state), state_string(cur_state));
1041 }
1042
1043 static void assert_panel_unlocked(struct drm_i915_private *dev_priv,
1044                                   enum pipe pipe)
1045 {
1046         int pp_reg, lvds_reg;
1047         u32 val;
1048         enum pipe panel_pipe = PIPE_A;
1049         bool locked = true;
1050
1051         if (HAS_PCH_SPLIT(dev_priv->dev)) {
1052                 pp_reg = PCH_PP_CONTROL;
1053                 lvds_reg = PCH_LVDS;
1054         } else {
1055                 pp_reg = PP_CONTROL;
1056                 lvds_reg = LVDS;
1057         }
1058
1059         val = I915_READ(pp_reg);
1060         if (!(val & PANEL_POWER_ON) ||
1061             ((val & PANEL_UNLOCK_REGS) == PANEL_UNLOCK_REGS))
1062                 locked = false;
1063
1064         if (I915_READ(lvds_reg) & LVDS_PIPEB_SELECT)
1065                 panel_pipe = PIPE_B;
1066
1067         WARN(panel_pipe == pipe && locked,
1068              "panel assertion failure, pipe %c regs locked\n",
1069              pipe_name(pipe));
1070 }
1071
1072 void assert_pipe(struct drm_i915_private *dev_priv,
1073                  enum pipe pipe, bool state)
1074 {
1075         int reg;
1076         u32 val;
1077         bool cur_state;
1078         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
1079                                                                       pipe);
1080
1081         /* if we need the pipe A quirk it must be always on */
1082         if (pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE)
1083                 state = true;
1084
1085         if (!intel_display_power_enabled(dev_priv->dev,
1086                                 POWER_DOMAIN_TRANSCODER(cpu_transcoder))) {
1087                 cur_state = false;
1088         } else {
1089                 reg = PIPECONF(cpu_transcoder);
1090                 val = I915_READ(reg);
1091                 cur_state = !!(val & PIPECONF_ENABLE);
1092         }
1093
1094         WARN(cur_state != state,
1095              "pipe %c assertion failure (expected %s, current %s)\n",
1096              pipe_name(pipe), state_string(state), state_string(cur_state));
1097 }
1098
1099 static void assert_plane(struct drm_i915_private *dev_priv,
1100                          enum plane plane, bool state)
1101 {
1102         int reg;
1103         u32 val;
1104         bool cur_state;
1105
1106         reg = DSPCNTR(plane);
1107         val = I915_READ(reg);
1108         cur_state = !!(val & DISPLAY_PLANE_ENABLE);
1109         WARN(cur_state != state,
1110              "plane %c assertion failure (expected %s, current %s)\n",
1111              plane_name(plane), state_string(state), state_string(cur_state));
1112 }
1113
1114 #define assert_plane_enabled(d, p) assert_plane(d, p, true)
1115 #define assert_plane_disabled(d, p) assert_plane(d, p, false)
1116
1117 static void assert_planes_disabled(struct drm_i915_private *dev_priv,
1118                                    enum pipe pipe)
1119 {
1120         struct drm_device *dev = dev_priv->dev;
1121         int reg, i;
1122         u32 val;
1123         int cur_pipe;
1124
1125         /* Primary planes are fixed to pipes on gen4+ */
1126         if (INTEL_INFO(dev)->gen >= 4) {
1127                 reg = DSPCNTR(pipe);
1128                 val = I915_READ(reg);
1129                 WARN((val & DISPLAY_PLANE_ENABLE),
1130                      "plane %c assertion failure, should be disabled but not\n",
1131                      plane_name(pipe));
1132                 return;
1133         }
1134
1135         /* Need to check both planes against the pipe */
1136         for_each_pipe(i) {
1137                 reg = DSPCNTR(i);
1138                 val = I915_READ(reg);
1139                 cur_pipe = (val & DISPPLANE_SEL_PIPE_MASK) >>
1140                         DISPPLANE_SEL_PIPE_SHIFT;
1141                 WARN((val & DISPLAY_PLANE_ENABLE) && pipe == cur_pipe,
1142                      "plane %c assertion failure, should be off on pipe %c but is still active\n",
1143                      plane_name(i), pipe_name(pipe));
1144         }
1145 }
1146
1147 static void assert_sprites_disabled(struct drm_i915_private *dev_priv,
1148                                     enum pipe pipe)
1149 {
1150         struct drm_device *dev = dev_priv->dev;
1151         int reg, i;
1152         u32 val;
1153
1154         if (IS_VALLEYVIEW(dev)) {
1155                 for (i = 0; i < dev_priv->num_plane; i++) {
1156                         reg = SPCNTR(pipe, i);
1157                         val = I915_READ(reg);
1158                         WARN((val & SP_ENABLE),
1159                              "sprite %c assertion failure, should be off on pipe %c but is still active\n",
1160                              sprite_name(pipe, i), pipe_name(pipe));
1161                 }
1162         } else if (INTEL_INFO(dev)->gen >= 7) {
1163                 reg = SPRCTL(pipe);
1164                 val = I915_READ(reg);
1165                 WARN((val & SPRITE_ENABLE),
1166                      "sprite %c assertion failure, should be off on pipe %c but is still active\n",
1167                      plane_name(pipe), pipe_name(pipe));
1168         } else if (INTEL_INFO(dev)->gen >= 5) {
1169                 reg = DVSCNTR(pipe);
1170                 val = I915_READ(reg);
1171                 WARN((val & DVS_ENABLE),
1172                      "sprite %c assertion failure, should be off on pipe %c but is still active\n",
1173                      plane_name(pipe), pipe_name(pipe));
1174         }
1175 }
1176
1177 static void assert_pch_refclk_enabled(struct drm_i915_private *dev_priv)
1178 {
1179         u32 val;
1180         bool enabled;
1181
1182         if (HAS_PCH_LPT(dev_priv->dev)) {
1183                 DRM_DEBUG_DRIVER("LPT does not has PCH refclk, skipping check\n");
1184                 return;
1185         }
1186
1187         val = I915_READ(PCH_DREF_CONTROL);
1188         enabled = !!(val & (DREF_SSC_SOURCE_MASK | DREF_NONSPREAD_SOURCE_MASK |
1189                             DREF_SUPERSPREAD_SOURCE_MASK));
1190         WARN(!enabled, "PCH refclk assertion failure, should be active but is disabled\n");
1191 }
1192
1193 static void assert_pch_transcoder_disabled(struct drm_i915_private *dev_priv,
1194                                            enum pipe pipe)
1195 {
1196         int reg;
1197         u32 val;
1198         bool enabled;
1199
1200         reg = PCH_TRANSCONF(pipe);
1201         val = I915_READ(reg);
1202         enabled = !!(val & TRANS_ENABLE);
1203         WARN(enabled,
1204              "transcoder assertion failed, should be off on pipe %c but is still active\n",
1205              pipe_name(pipe));
1206 }
1207
1208 static bool dp_pipe_enabled(struct drm_i915_private *dev_priv,
1209                             enum pipe pipe, u32 port_sel, u32 val)
1210 {
1211         if ((val & DP_PORT_EN) == 0)
1212                 return false;
1213
1214         if (HAS_PCH_CPT(dev_priv->dev)) {
1215                 u32     trans_dp_ctl_reg = TRANS_DP_CTL(pipe);
1216                 u32     trans_dp_ctl = I915_READ(trans_dp_ctl_reg);
1217                 if ((trans_dp_ctl & TRANS_DP_PORT_SEL_MASK) != port_sel)
1218                         return false;
1219         } else {
1220                 if ((val & DP_PIPE_MASK) != (pipe << 30))
1221                         return false;
1222         }
1223         return true;
1224 }
1225
1226 static bool hdmi_pipe_enabled(struct drm_i915_private *dev_priv,
1227                               enum pipe pipe, u32 val)
1228 {
1229         if ((val & SDVO_ENABLE) == 0)
1230                 return false;
1231
1232         if (HAS_PCH_CPT(dev_priv->dev)) {
1233                 if ((val & SDVO_PIPE_SEL_MASK_CPT) != SDVO_PIPE_SEL_CPT(pipe))
1234                         return false;
1235         } else {
1236                 if ((val & SDVO_PIPE_SEL_MASK) != SDVO_PIPE_SEL(pipe))
1237                         return false;
1238         }
1239         return true;
1240 }
1241
1242 static bool lvds_pipe_enabled(struct drm_i915_private *dev_priv,
1243                               enum pipe pipe, u32 val)
1244 {
1245         if ((val & LVDS_PORT_EN) == 0)
1246                 return false;
1247
1248         if (HAS_PCH_CPT(dev_priv->dev)) {
1249                 if ((val & PORT_TRANS_SEL_MASK) != PORT_TRANS_SEL_CPT(pipe))
1250                         return false;
1251         } else {
1252                 if ((val & LVDS_PIPE_MASK) != LVDS_PIPE(pipe))
1253                         return false;
1254         }
1255         return true;
1256 }
1257
1258 static bool adpa_pipe_enabled(struct drm_i915_private *dev_priv,
1259                               enum pipe pipe, u32 val)
1260 {
1261         if ((val & ADPA_DAC_ENABLE) == 0)
1262                 return false;
1263         if (HAS_PCH_CPT(dev_priv->dev)) {
1264                 if ((val & PORT_TRANS_SEL_MASK) != PORT_TRANS_SEL_CPT(pipe))
1265                         return false;
1266         } else {
1267                 if ((val & ADPA_PIPE_SELECT_MASK) != ADPA_PIPE_SELECT(pipe))
1268                         return false;
1269         }
1270         return true;
1271 }
1272
1273 static void assert_pch_dp_disabled(struct drm_i915_private *dev_priv,
1274                                    enum pipe pipe, int reg, u32 port_sel)
1275 {
1276         u32 val = I915_READ(reg);
1277         WARN(dp_pipe_enabled(dev_priv, pipe, port_sel, val),
1278              "PCH DP (0x%08x) enabled on transcoder %c, should be disabled\n",
1279              reg, pipe_name(pipe));
1280
1281         WARN(HAS_PCH_IBX(dev_priv->dev) && (val & DP_PORT_EN) == 0
1282              && (val & DP_PIPEB_SELECT),
1283              "IBX PCH dp port still using transcoder B\n");
1284 }
1285
1286 static void assert_pch_hdmi_disabled(struct drm_i915_private *dev_priv,
1287                                      enum pipe pipe, int reg)
1288 {
1289         u32 val = I915_READ(reg);
1290         WARN(hdmi_pipe_enabled(dev_priv, pipe, val),
1291              "PCH HDMI (0x%08x) enabled on transcoder %c, should be disabled\n",
1292              reg, pipe_name(pipe));
1293
1294         WARN(HAS_PCH_IBX(dev_priv->dev) && (val & SDVO_ENABLE) == 0
1295              && (val & SDVO_PIPE_B_SELECT),
1296              "IBX PCH hdmi port still using transcoder B\n");
1297 }
1298
1299 static void assert_pch_ports_disabled(struct drm_i915_private *dev_priv,
1300                                       enum pipe pipe)
1301 {
1302         int reg;
1303         u32 val;
1304
1305         assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_B, TRANS_DP_PORT_SEL_B);
1306         assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_C, TRANS_DP_PORT_SEL_C);
1307         assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_D, TRANS_DP_PORT_SEL_D);
1308
1309         reg = PCH_ADPA;
1310         val = I915_READ(reg);
1311         WARN(adpa_pipe_enabled(dev_priv, pipe, val),
1312              "PCH VGA enabled on transcoder %c, should be disabled\n",
1313              pipe_name(pipe));
1314
1315         reg = PCH_LVDS;
1316         val = I915_READ(reg);
1317         WARN(lvds_pipe_enabled(dev_priv, pipe, val),
1318              "PCH LVDS enabled on transcoder %c, should be disabled\n",
1319              pipe_name(pipe));
1320
1321         assert_pch_hdmi_disabled(dev_priv, pipe, PCH_HDMIB);
1322         assert_pch_hdmi_disabled(dev_priv, pipe, PCH_HDMIC);
1323         assert_pch_hdmi_disabled(dev_priv, pipe, PCH_HDMID);
1324 }
1325
1326 static void vlv_enable_pll(struct intel_crtc *crtc)
1327 {
1328         struct drm_device *dev = crtc->base.dev;
1329         struct drm_i915_private *dev_priv = dev->dev_private;
1330         int reg = DPLL(crtc->pipe);
1331         u32 dpll = crtc->config.dpll_hw_state.dpll;
1332
1333         assert_pipe_disabled(dev_priv, crtc->pipe);
1334
1335         /* No really, not for ILK+ */
1336         BUG_ON(!IS_VALLEYVIEW(dev_priv->dev));
1337
1338         /* PLL is protected by panel, make sure we can write it */
1339         if (IS_MOBILE(dev_priv->dev) && !IS_I830(dev_priv->dev))
1340                 assert_panel_unlocked(dev_priv, crtc->pipe);
1341
1342         I915_WRITE(reg, dpll);
1343         POSTING_READ(reg);
1344         udelay(150);
1345
1346         if (wait_for(((I915_READ(reg) & DPLL_LOCK_VLV) == DPLL_LOCK_VLV), 1))
1347                 DRM_ERROR("DPLL %d failed to lock\n", crtc->pipe);
1348
1349         I915_WRITE(DPLL_MD(crtc->pipe), crtc->config.dpll_hw_state.dpll_md);
1350         POSTING_READ(DPLL_MD(crtc->pipe));
1351
1352         /* We do this three times for luck */
1353         I915_WRITE(reg, dpll);
1354         POSTING_READ(reg);
1355         udelay(150); /* wait for warmup */
1356         I915_WRITE(reg, dpll);
1357         POSTING_READ(reg);
1358         udelay(150); /* wait for warmup */
1359         I915_WRITE(reg, dpll);
1360         POSTING_READ(reg);
1361         udelay(150); /* wait for warmup */
1362 }
1363
1364 static void i9xx_enable_pll(struct intel_crtc *crtc)
1365 {
1366         struct drm_device *dev = crtc->base.dev;
1367         struct drm_i915_private *dev_priv = dev->dev_private;
1368         int reg = DPLL(crtc->pipe);
1369         u32 dpll = crtc->config.dpll_hw_state.dpll;
1370
1371         assert_pipe_disabled(dev_priv, crtc->pipe);
1372
1373         /* No really, not for ILK+ */
1374         BUG_ON(dev_priv->info->gen >= 5);
1375
1376         /* PLL is protected by panel, make sure we can write it */
1377         if (IS_MOBILE(dev) && !IS_I830(dev))
1378                 assert_panel_unlocked(dev_priv, crtc->pipe);
1379
1380         I915_WRITE(reg, dpll);
1381
1382         /* Wait for the clocks to stabilize. */
1383         POSTING_READ(reg);
1384         udelay(150);
1385
1386         if (INTEL_INFO(dev)->gen >= 4) {
1387                 I915_WRITE(DPLL_MD(crtc->pipe),
1388                            crtc->config.dpll_hw_state.dpll_md);
1389         } else {
1390                 /* The pixel multiplier can only be updated once the
1391                  * DPLL is enabled and the clocks are stable.
1392                  *
1393                  * So write it again.
1394                  */
1395                 I915_WRITE(reg, dpll);
1396         }
1397
1398         /* We do this three times for luck */
1399         I915_WRITE(reg, dpll);
1400         POSTING_READ(reg);
1401         udelay(150); /* wait for warmup */
1402         I915_WRITE(reg, dpll);
1403         POSTING_READ(reg);
1404         udelay(150); /* wait for warmup */
1405         I915_WRITE(reg, dpll);
1406         POSTING_READ(reg);
1407         udelay(150); /* wait for warmup */
1408 }
1409
1410 /**
1411  * i9xx_disable_pll - disable a PLL
1412  * @dev_priv: i915 private structure
1413  * @pipe: pipe PLL to disable
1414  *
1415  * Disable the PLL for @pipe, making sure the pipe is off first.
1416  *
1417  * Note!  This is for pre-ILK only.
1418  */
1419 static void i9xx_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
1420 {
1421         /* Don't disable pipe A or pipe A PLLs if needed */
1422         if (pipe == PIPE_A && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
1423                 return;
1424
1425         /* Make sure the pipe isn't still relying on us */
1426         assert_pipe_disabled(dev_priv, pipe);
1427
1428         I915_WRITE(DPLL(pipe), 0);
1429         POSTING_READ(DPLL(pipe));
1430 }
1431
1432 void vlv_wait_port_ready(struct drm_i915_private *dev_priv, int port)
1433 {
1434         u32 port_mask;
1435
1436         if (!port)
1437                 port_mask = DPLL_PORTB_READY_MASK;
1438         else
1439                 port_mask = DPLL_PORTC_READY_MASK;
1440
1441         if (wait_for((I915_READ(DPLL(0)) & port_mask) == 0, 1000))
1442                 WARN(1, "timed out waiting for port %c ready: 0x%08x\n",
1443                      'B' + port, I915_READ(DPLL(0)));
1444 }
1445
1446 /**
1447  * ironlake_enable_shared_dpll - enable PCH PLL
1448  * @dev_priv: i915 private structure
1449  * @pipe: pipe PLL to enable
1450  *
1451  * The PCH PLL needs to be enabled before the PCH transcoder, since it
1452  * drives the transcoder clock.
1453  */
1454 static void ironlake_enable_shared_dpll(struct intel_crtc *crtc)
1455 {
1456         struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
1457         struct intel_shared_dpll *pll = intel_crtc_to_shared_dpll(crtc);
1458
1459         /* PCH PLLs only available on ILK, SNB and IVB */
1460         BUG_ON(dev_priv->info->gen < 5);
1461         if (WARN_ON(pll == NULL))
1462                 return;
1463
1464         if (WARN_ON(pll->refcount == 0))
1465                 return;
1466
1467         DRM_DEBUG_KMS("enable %s (active %d, on? %d)for crtc %d\n",
1468                       pll->name, pll->active, pll->on,
1469                       crtc->base.base.id);
1470
1471         if (pll->active++) {
1472                 WARN_ON(!pll->on);
1473                 assert_shared_dpll_enabled(dev_priv, pll);
1474                 return;
1475         }
1476         WARN_ON(pll->on);
1477
1478         DRM_DEBUG_KMS("enabling %s\n", pll->name);
1479         pll->enable(dev_priv, pll);
1480         pll->on = true;
1481 }
1482
1483 static void intel_disable_shared_dpll(struct intel_crtc *crtc)
1484 {
1485         struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
1486         struct intel_shared_dpll *pll = intel_crtc_to_shared_dpll(crtc);
1487
1488         /* PCH only available on ILK+ */
1489         BUG_ON(dev_priv->info->gen < 5);
1490         if (WARN_ON(pll == NULL))
1491                return;
1492
1493         if (WARN_ON(pll->refcount == 0))
1494                 return;
1495
1496         DRM_DEBUG_KMS("disable %s (active %d, on? %d) for crtc %d\n",
1497                       pll->name, pll->active, pll->on,
1498                       crtc->base.base.id);
1499
1500         if (WARN_ON(pll->active == 0)) {
1501                 assert_shared_dpll_disabled(dev_priv, pll);
1502                 return;
1503         }
1504
1505         assert_shared_dpll_enabled(dev_priv, pll);
1506         WARN_ON(!pll->on);
1507         if (--pll->active)
1508                 return;
1509
1510         DRM_DEBUG_KMS("disabling %s\n", pll->name);
1511         pll->disable(dev_priv, pll);
1512         pll->on = false;
1513 }
1514
1515 static void ironlake_enable_pch_transcoder(struct drm_i915_private *dev_priv,
1516                                            enum pipe pipe)
1517 {
1518         struct drm_device *dev = dev_priv->dev;
1519         struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
1520         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1521         uint32_t reg, val, pipeconf_val;
1522
1523         /* PCH only available on ILK+ */
1524         BUG_ON(dev_priv->info->gen < 5);
1525
1526         /* Make sure PCH DPLL is enabled */
1527         assert_shared_dpll_enabled(dev_priv,
1528                                    intel_crtc_to_shared_dpll(intel_crtc));
1529
1530         /* FDI must be feeding us bits for PCH ports */
1531         assert_fdi_tx_enabled(dev_priv, pipe);
1532         assert_fdi_rx_enabled(dev_priv, pipe);
1533
1534         if (HAS_PCH_CPT(dev)) {
1535                 /* Workaround: Set the timing override bit before enabling the
1536                  * pch transcoder. */
1537                 reg = TRANS_CHICKEN2(pipe);
1538                 val = I915_READ(reg);
1539                 val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
1540                 I915_WRITE(reg, val);
1541         }
1542
1543         reg = PCH_TRANSCONF(pipe);
1544         val = I915_READ(reg);
1545         pipeconf_val = I915_READ(PIPECONF(pipe));
1546
1547         if (HAS_PCH_IBX(dev_priv->dev)) {
1548                 /*
1549                  * make the BPC in transcoder be consistent with
1550                  * that in pipeconf reg.
1551                  */
1552                 val &= ~PIPECONF_BPC_MASK;
1553                 val |= pipeconf_val & PIPECONF_BPC_MASK;
1554         }
1555
1556         val &= ~TRANS_INTERLACE_MASK;
1557         if ((pipeconf_val & PIPECONF_INTERLACE_MASK) == PIPECONF_INTERLACED_ILK)
1558                 if (HAS_PCH_IBX(dev_priv->dev) &&
1559                     intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO))
1560                         val |= TRANS_LEGACY_INTERLACED_ILK;
1561                 else
1562                         val |= TRANS_INTERLACED;
1563         else
1564                 val |= TRANS_PROGRESSIVE;
1565
1566         I915_WRITE(reg, val | TRANS_ENABLE);
1567         if (wait_for(I915_READ(reg) & TRANS_STATE_ENABLE, 100))
1568                 DRM_ERROR("failed to enable transcoder %c\n", pipe_name(pipe));
1569 }
1570
1571 static void lpt_enable_pch_transcoder(struct drm_i915_private *dev_priv,
1572                                       enum transcoder cpu_transcoder)
1573 {
1574         u32 val, pipeconf_val;
1575
1576         /* PCH only available on ILK+ */
1577         BUG_ON(dev_priv->info->gen < 5);
1578
1579         /* FDI must be feeding us bits for PCH ports */
1580         assert_fdi_tx_enabled(dev_priv, (enum pipe) cpu_transcoder);
1581         assert_fdi_rx_enabled(dev_priv, TRANSCODER_A);
1582
1583         /* Workaround: set timing override bit. */
1584         val = I915_READ(_TRANSA_CHICKEN2);
1585         val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
1586         I915_WRITE(_TRANSA_CHICKEN2, val);
1587
1588         val = TRANS_ENABLE;
1589         pipeconf_val = I915_READ(PIPECONF(cpu_transcoder));
1590
1591         if ((pipeconf_val & PIPECONF_INTERLACE_MASK_HSW) ==
1592             PIPECONF_INTERLACED_ILK)
1593                 val |= TRANS_INTERLACED;
1594         else
1595                 val |= TRANS_PROGRESSIVE;
1596
1597         I915_WRITE(LPT_TRANSCONF, val);
1598         if (wait_for(I915_READ(LPT_TRANSCONF) & TRANS_STATE_ENABLE, 100))
1599                 DRM_ERROR("Failed to enable PCH transcoder\n");
1600 }
1601
1602 static void ironlake_disable_pch_transcoder(struct drm_i915_private *dev_priv,
1603                                             enum pipe pipe)
1604 {
1605         struct drm_device *dev = dev_priv->dev;
1606         uint32_t reg, val;
1607
1608         /* FDI relies on the transcoder */
1609         assert_fdi_tx_disabled(dev_priv, pipe);
1610         assert_fdi_rx_disabled(dev_priv, pipe);
1611
1612         /* Ports must be off as well */
1613         assert_pch_ports_disabled(dev_priv, pipe);
1614
1615         reg = PCH_TRANSCONF(pipe);
1616         val = I915_READ(reg);
1617         val &= ~TRANS_ENABLE;
1618         I915_WRITE(reg, val);
1619         /* wait for PCH transcoder off, transcoder state */
1620         if (wait_for((I915_READ(reg) & TRANS_STATE_ENABLE) == 0, 50))
1621                 DRM_ERROR("failed to disable transcoder %c\n", pipe_name(pipe));
1622
1623         if (!HAS_PCH_IBX(dev)) {
1624                 /* Workaround: Clear the timing override chicken bit again. */
1625                 reg = TRANS_CHICKEN2(pipe);
1626                 val = I915_READ(reg);
1627                 val &= ~TRANS_CHICKEN2_TIMING_OVERRIDE;
1628                 I915_WRITE(reg, val);
1629         }
1630 }
1631
1632 static void lpt_disable_pch_transcoder(struct drm_i915_private *dev_priv)
1633 {
1634         u32 val;
1635
1636         val = I915_READ(LPT_TRANSCONF);
1637         val &= ~TRANS_ENABLE;
1638         I915_WRITE(LPT_TRANSCONF, val);
1639         /* wait for PCH transcoder off, transcoder state */
1640         if (wait_for((I915_READ(LPT_TRANSCONF) & TRANS_STATE_ENABLE) == 0, 50))
1641                 DRM_ERROR("Failed to disable PCH transcoder\n");
1642
1643         /* Workaround: clear timing override bit. */
1644         val = I915_READ(_TRANSA_CHICKEN2);
1645         val &= ~TRANS_CHICKEN2_TIMING_OVERRIDE;
1646         I915_WRITE(_TRANSA_CHICKEN2, val);
1647 }
1648
1649 /**
1650  * intel_enable_pipe - enable a pipe, asserting requirements
1651  * @dev_priv: i915 private structure
1652  * @pipe: pipe to enable
1653  * @pch_port: on ILK+, is this pipe driving a PCH port or not
1654  *
1655  * Enable @pipe, making sure that various hardware specific requirements
1656  * are met, if applicable, e.g. PLL enabled, LVDS pairs enabled, etc.
1657  *
1658  * @pipe should be %PIPE_A or %PIPE_B.
1659  *
1660  * Will wait until the pipe is actually running (i.e. first vblank) before
1661  * returning.
1662  */
1663 static void intel_enable_pipe(struct drm_i915_private *dev_priv, enum pipe pipe,
1664                               bool pch_port)
1665 {
1666         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
1667                                                                       pipe);
1668         enum pipe pch_transcoder;
1669         int reg;
1670         u32 val;
1671
1672         assert_planes_disabled(dev_priv, pipe);
1673         assert_sprites_disabled(dev_priv, pipe);
1674
1675         if (HAS_PCH_LPT(dev_priv->dev))
1676                 pch_transcoder = TRANSCODER_A;
1677         else
1678                 pch_transcoder = pipe;
1679
1680         /*
1681          * A pipe without a PLL won't actually be able to drive bits from
1682          * a plane.  On ILK+ the pipe PLLs are integrated, so we don't
1683          * need the check.
1684          */
1685         if (!HAS_PCH_SPLIT(dev_priv->dev))
1686                 assert_pll_enabled(dev_priv, pipe);
1687         else {
1688                 if (pch_port) {
1689                         /* if driving the PCH, we need FDI enabled */
1690                         assert_fdi_rx_pll_enabled(dev_priv, pch_transcoder);
1691                         assert_fdi_tx_pll_enabled(dev_priv,
1692                                                   (enum pipe) cpu_transcoder);
1693                 }
1694                 /* FIXME: assert CPU port conditions for SNB+ */
1695         }
1696
1697         reg = PIPECONF(cpu_transcoder);
1698         val = I915_READ(reg);
1699         if (val & PIPECONF_ENABLE)
1700                 return;
1701
1702         I915_WRITE(reg, val | PIPECONF_ENABLE);
1703         intel_wait_for_vblank(dev_priv->dev, pipe);
1704 }
1705
1706 /**
1707  * intel_disable_pipe - disable a pipe, asserting requirements
1708  * @dev_priv: i915 private structure
1709  * @pipe: pipe to disable
1710  *
1711  * Disable @pipe, making sure that various hardware specific requirements
1712  * are met, if applicable, e.g. plane disabled, panel fitter off, etc.
1713  *
1714  * @pipe should be %PIPE_A or %PIPE_B.
1715  *
1716  * Will wait until the pipe has shut down before returning.
1717  */
1718 static void intel_disable_pipe(struct drm_i915_private *dev_priv,
1719                                enum pipe pipe)
1720 {
1721         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
1722                                                                       pipe);
1723         int reg;
1724         u32 val;
1725
1726         /*
1727          * Make sure planes won't keep trying to pump pixels to us,
1728          * or we might hang the display.
1729          */
1730         assert_planes_disabled(dev_priv, pipe);
1731         assert_sprites_disabled(dev_priv, pipe);
1732
1733         /* Don't disable pipe A or pipe A PLLs if needed */
1734         if (pipe == PIPE_A && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
1735                 return;
1736
1737         reg = PIPECONF(cpu_transcoder);
1738         val = I915_READ(reg);
1739         if ((val & PIPECONF_ENABLE) == 0)
1740                 return;
1741
1742         I915_WRITE(reg, val & ~PIPECONF_ENABLE);
1743         intel_wait_for_pipe_off(dev_priv->dev, pipe);
1744 }
1745
1746 /*
1747  * Plane regs are double buffered, going from enabled->disabled needs a
1748  * trigger in order to latch.  The display address reg provides this.
1749  */
1750 void intel_flush_display_plane(struct drm_i915_private *dev_priv,
1751                                       enum plane plane)
1752 {
1753         if (dev_priv->info->gen >= 4)
1754                 I915_WRITE(DSPSURF(plane), I915_READ(DSPSURF(plane)));
1755         else
1756                 I915_WRITE(DSPADDR(plane), I915_READ(DSPADDR(plane)));
1757 }
1758
1759 /**
1760  * intel_enable_plane - enable a display plane on a given pipe
1761  * @dev_priv: i915 private structure
1762  * @plane: plane to enable
1763  * @pipe: pipe being fed
1764  *
1765  * Enable @plane on @pipe, making sure that @pipe is running first.
1766  */
1767 static void intel_enable_plane(struct drm_i915_private *dev_priv,
1768                                enum plane plane, enum pipe pipe)
1769 {
1770         int reg;
1771         u32 val;
1772
1773         /* If the pipe isn't enabled, we can't pump pixels and may hang */
1774         assert_pipe_enabled(dev_priv, pipe);
1775
1776         reg = DSPCNTR(plane);
1777         val = I915_READ(reg);
1778         if (val & DISPLAY_PLANE_ENABLE)
1779                 return;
1780
1781         I915_WRITE(reg, val | DISPLAY_PLANE_ENABLE);
1782         intel_flush_display_plane(dev_priv, plane);
1783         intel_wait_for_vblank(dev_priv->dev, pipe);
1784 }
1785
1786 /**
1787  * intel_disable_plane - disable a display plane
1788  * @dev_priv: i915 private structure
1789  * @plane: plane to disable
1790  * @pipe: pipe consuming the data
1791  *
1792  * Disable @plane; should be an independent operation.
1793  */
1794 static void intel_disable_plane(struct drm_i915_private *dev_priv,
1795                                 enum plane plane, enum pipe pipe)
1796 {
1797         int reg;
1798         u32 val;
1799
1800         reg = DSPCNTR(plane);
1801         val = I915_READ(reg);
1802         if ((val & DISPLAY_PLANE_ENABLE) == 0)
1803                 return;
1804
1805         I915_WRITE(reg, val & ~DISPLAY_PLANE_ENABLE);
1806         intel_flush_display_plane(dev_priv, plane);
1807         intel_wait_for_vblank(dev_priv->dev, pipe);
1808 }
1809
1810 static bool need_vtd_wa(struct drm_device *dev)
1811 {
1812 #ifdef CONFIG_INTEL_IOMMU
1813         if (INTEL_INFO(dev)->gen >= 6 && intel_iommu_gfx_mapped)
1814                 return true;
1815 #endif
1816         return false;
1817 }
1818
1819 int
1820 intel_pin_and_fence_fb_obj(struct drm_device *dev,
1821                            struct drm_i915_gem_object *obj,
1822                            struct intel_ring_buffer *pipelined)
1823 {
1824         struct drm_i915_private *dev_priv = dev->dev_private;
1825         u32 alignment;
1826         int ret;
1827
1828         switch (obj->tiling_mode) {
1829         case I915_TILING_NONE:
1830                 if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
1831                         alignment = 128 * 1024;
1832                 else if (INTEL_INFO(dev)->gen >= 4)
1833                         alignment = 4 * 1024;
1834                 else
1835                         alignment = 64 * 1024;
1836                 break;
1837         case I915_TILING_X:
1838                 /* pin() will align the object as required by fence */
1839                 alignment = 0;
1840                 break;
1841         case I915_TILING_Y:
1842                 /* Despite that we check this in framebuffer_init userspace can
1843                  * screw us over and change the tiling after the fact. Only
1844                  * pinned buffers can't change their tiling. */
1845                 DRM_DEBUG_DRIVER("Y tiled not allowed for scan out buffers\n");
1846                 return -EINVAL;
1847         default:
1848                 BUG();
1849         }
1850
1851         /* Note that the w/a also requires 64 PTE of padding following the
1852          * bo. We currently fill all unused PTE with the shadow page and so
1853          * we should always have valid PTE following the scanout preventing
1854          * the VT-d warning.
1855          */
1856         if (need_vtd_wa(dev) && alignment < 256 * 1024)
1857                 alignment = 256 * 1024;
1858
1859         dev_priv->mm.interruptible = false;
1860         ret = i915_gem_object_pin_to_display_plane(obj, alignment, pipelined);
1861         if (ret)
1862                 goto err_interruptible;
1863
1864         /* Install a fence for tiled scan-out. Pre-i965 always needs a
1865          * fence, whereas 965+ only requires a fence if using
1866          * framebuffer compression.  For simplicity, we always install
1867          * a fence as the cost is not that onerous.
1868          */
1869         ret = i915_gem_object_get_fence(obj);
1870         if (ret)
1871                 goto err_unpin;
1872
1873         i915_gem_object_pin_fence(obj);
1874
1875         dev_priv->mm.interruptible = true;
1876         return 0;
1877
1878 err_unpin:
1879         i915_gem_object_unpin_from_display_plane(obj);
1880 err_interruptible:
1881         dev_priv->mm.interruptible = true;
1882         return ret;
1883 }
1884
1885 void intel_unpin_fb_obj(struct drm_i915_gem_object *obj)
1886 {
1887         i915_gem_object_unpin_fence(obj);
1888         i915_gem_object_unpin_from_display_plane(obj);
1889 }
1890
1891 /* Computes the linear offset to the base tile and adjusts x, y. bytes per pixel
1892  * is assumed to be a power-of-two. */
1893 unsigned long intel_gen4_compute_page_offset(int *x, int *y,
1894                                              unsigned int tiling_mode,
1895                                              unsigned int cpp,
1896                                              unsigned int pitch)
1897 {
1898         if (tiling_mode != I915_TILING_NONE) {
1899                 unsigned int tile_rows, tiles;
1900
1901                 tile_rows = *y / 8;
1902                 *y %= 8;
1903
1904                 tiles = *x / (512/cpp);
1905                 *x %= 512/cpp;
1906
1907                 return tile_rows * pitch * 8 + tiles * 4096;
1908         } else {
1909                 unsigned int offset;
1910
1911                 offset = *y * pitch + *x * cpp;
1912                 *y = 0;
1913                 *x = (offset & 4095) / cpp;
1914                 return offset & -4096;
1915         }
1916 }
1917
1918 static int i9xx_update_plane(struct drm_crtc *crtc, struct drm_framebuffer *fb,
1919                              int x, int y)
1920 {
1921         struct drm_device *dev = crtc->dev;
1922         struct drm_i915_private *dev_priv = dev->dev_private;
1923         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1924         struct intel_framebuffer *intel_fb;
1925         struct drm_i915_gem_object *obj;
1926         int plane = intel_crtc->plane;
1927         unsigned long linear_offset;
1928         u32 dspcntr;
1929         u32 reg;
1930
1931         switch (plane) {
1932         case 0:
1933         case 1:
1934                 break;
1935         default:
1936                 DRM_ERROR("Can't update plane %c in SAREA\n", plane_name(plane));
1937                 return -EINVAL;
1938         }
1939
1940         intel_fb = to_intel_framebuffer(fb);
1941         obj = intel_fb->obj;
1942
1943         reg = DSPCNTR(plane);
1944         dspcntr = I915_READ(reg);
1945         /* Mask out pixel format bits in case we change it */
1946         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
1947         switch (fb->pixel_format) {
1948         case DRM_FORMAT_C8:
1949                 dspcntr |= DISPPLANE_8BPP;
1950                 break;
1951         case DRM_FORMAT_XRGB1555:
1952         case DRM_FORMAT_ARGB1555:
1953                 dspcntr |= DISPPLANE_BGRX555;
1954                 break;
1955         case DRM_FORMAT_RGB565:
1956                 dspcntr |= DISPPLANE_BGRX565;
1957                 break;
1958         case DRM_FORMAT_XRGB8888:
1959         case DRM_FORMAT_ARGB8888:
1960                 dspcntr |= DISPPLANE_BGRX888;
1961                 break;
1962         case DRM_FORMAT_XBGR8888:
1963         case DRM_FORMAT_ABGR8888:
1964                 dspcntr |= DISPPLANE_RGBX888;
1965                 break;
1966         case DRM_FORMAT_XRGB2101010:
1967         case DRM_FORMAT_ARGB2101010:
1968                 dspcntr |= DISPPLANE_BGRX101010;
1969                 break;
1970         case DRM_FORMAT_XBGR2101010:
1971         case DRM_FORMAT_ABGR2101010:
1972                 dspcntr |= DISPPLANE_RGBX101010;
1973                 break;
1974         default:
1975                 BUG();
1976         }
1977
1978         if (INTEL_INFO(dev)->gen >= 4) {
1979                 if (obj->tiling_mode != I915_TILING_NONE)
1980                         dspcntr |= DISPPLANE_TILED;
1981                 else
1982                         dspcntr &= ~DISPPLANE_TILED;
1983         }
1984
1985         if (IS_G4X(dev))
1986                 dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
1987
1988         I915_WRITE(reg, dspcntr);
1989
1990         linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
1991
1992         if (INTEL_INFO(dev)->gen >= 4) {
1993                 intel_crtc->dspaddr_offset =
1994                         intel_gen4_compute_page_offset(&x, &y, obj->tiling_mode,
1995                                                        fb->bits_per_pixel / 8,
1996                                                        fb->pitches[0]);
1997                 linear_offset -= intel_crtc->dspaddr_offset;
1998         } else {
1999                 intel_crtc->dspaddr_offset = linear_offset;
2000         }
2001
2002         DRM_DEBUG_KMS("Writing base %08lX %08lX %d %d %d\n",
2003                       i915_gem_obj_ggtt_offset(obj), linear_offset, x, y,
2004                       fb->pitches[0]);
2005         I915_WRITE(DSPSTRIDE(plane), fb->pitches[0]);
2006         if (INTEL_INFO(dev)->gen >= 4) {
2007                 I915_MODIFY_DISPBASE(DSPSURF(plane),
2008                                      i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset);
2009                 I915_WRITE(DSPTILEOFF(plane), (y << 16) | x);
2010                 I915_WRITE(DSPLINOFF(plane), linear_offset);
2011         } else
2012                 I915_WRITE(DSPADDR(plane), i915_gem_obj_ggtt_offset(obj) + linear_offset);
2013         POSTING_READ(reg);
2014
2015         return 0;
2016 }
2017
2018 static int ironlake_update_plane(struct drm_crtc *crtc,
2019                                  struct drm_framebuffer *fb, int x, int y)
2020 {
2021         struct drm_device *dev = crtc->dev;
2022         struct drm_i915_private *dev_priv = dev->dev_private;
2023         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2024         struct intel_framebuffer *intel_fb;
2025         struct drm_i915_gem_object *obj;
2026         int plane = intel_crtc->plane;
2027         unsigned long linear_offset;
2028         u32 dspcntr;
2029         u32 reg;
2030
2031         switch (plane) {
2032         case 0:
2033         case 1:
2034         case 2:
2035                 break;
2036         default:
2037                 DRM_ERROR("Can't update plane %c in SAREA\n", plane_name(plane));
2038                 return -EINVAL;
2039         }
2040
2041         intel_fb = to_intel_framebuffer(fb);
2042         obj = intel_fb->obj;
2043
2044         reg = DSPCNTR(plane);
2045         dspcntr = I915_READ(reg);
2046         /* Mask out pixel format bits in case we change it */
2047         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
2048         switch (fb->pixel_format) {
2049         case DRM_FORMAT_C8:
2050                 dspcntr |= DISPPLANE_8BPP;
2051                 break;
2052         case DRM_FORMAT_RGB565:
2053                 dspcntr |= DISPPLANE_BGRX565;
2054                 break;
2055         case DRM_FORMAT_XRGB8888:
2056         case DRM_FORMAT_ARGB8888:
2057                 dspcntr |= DISPPLANE_BGRX888;
2058                 break;
2059         case DRM_FORMAT_XBGR8888:
2060         case DRM_FORMAT_ABGR8888:
2061                 dspcntr |= DISPPLANE_RGBX888;
2062                 break;
2063         case DRM_FORMAT_XRGB2101010:
2064         case DRM_FORMAT_ARGB2101010:
2065                 dspcntr |= DISPPLANE_BGRX101010;
2066                 break;
2067         case DRM_FORMAT_XBGR2101010:
2068         case DRM_FORMAT_ABGR2101010:
2069                 dspcntr |= DISPPLANE_RGBX101010;
2070                 break;
2071         default:
2072                 BUG();
2073         }
2074
2075         if (obj->tiling_mode != I915_TILING_NONE)
2076                 dspcntr |= DISPPLANE_TILED;
2077         else
2078                 dspcntr &= ~DISPPLANE_TILED;
2079
2080         /* must disable */
2081         dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
2082
2083         I915_WRITE(reg, dspcntr);
2084
2085         linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
2086         intel_crtc->dspaddr_offset =
2087                 intel_gen4_compute_page_offset(&x, &y, obj->tiling_mode,
2088                                                fb->bits_per_pixel / 8,
2089                                                fb->pitches[0]);
2090         linear_offset -= intel_crtc->dspaddr_offset;
2091
2092         DRM_DEBUG_KMS("Writing base %08lX %08lX %d %d %d\n",
2093                       i915_gem_obj_ggtt_offset(obj), linear_offset, x, y,
2094                       fb->pitches[0]);
2095         I915_WRITE(DSPSTRIDE(plane), fb->pitches[0]);
2096         I915_MODIFY_DISPBASE(DSPSURF(plane),
2097                              i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset);
2098         if (IS_HASWELL(dev)) {
2099                 I915_WRITE(DSPOFFSET(plane), (y << 16) | x);
2100         } else {
2101                 I915_WRITE(DSPTILEOFF(plane), (y << 16) | x);
2102                 I915_WRITE(DSPLINOFF(plane), linear_offset);
2103         }
2104         POSTING_READ(reg);
2105
2106         return 0;
2107 }
2108
2109 /* Assume fb object is pinned & idle & fenced and just update base pointers */
2110 static int
2111 intel_pipe_set_base_atomic(struct drm_crtc *crtc, struct drm_framebuffer *fb,
2112                            int x, int y, enum mode_set_atomic state)
2113 {
2114         struct drm_device *dev = crtc->dev;
2115         struct drm_i915_private *dev_priv = dev->dev_private;
2116
2117         if (dev_priv->display.disable_fbc)
2118                 dev_priv->display.disable_fbc(dev);
2119         intel_increase_pllclock(crtc);
2120
2121         return dev_priv->display.update_plane(crtc, fb, x, y);
2122 }
2123
2124 void intel_display_handle_reset(struct drm_device *dev)
2125 {
2126         struct drm_i915_private *dev_priv = dev->dev_private;
2127         struct drm_crtc *crtc;
2128
2129         /*
2130          * Flips in the rings have been nuked by the reset,
2131          * so complete all pending flips so that user space
2132          * will get its events and not get stuck.
2133          *
2134          * Also update the base address of all primary
2135          * planes to the the last fb to make sure we're
2136          * showing the correct fb after a reset.
2137          *
2138          * Need to make two loops over the crtcs so that we
2139          * don't try to grab a crtc mutex before the
2140          * pending_flip_queue really got woken up.
2141          */
2142
2143         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
2144                 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2145                 enum plane plane = intel_crtc->plane;
2146
2147                 intel_prepare_page_flip(dev, plane);
2148                 intel_finish_page_flip_plane(dev, plane);
2149         }
2150
2151         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
2152                 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2153
2154                 mutex_lock(&crtc->mutex);
2155                 if (intel_crtc->active)
2156                         dev_priv->display.update_plane(crtc, crtc->fb,
2157                                                        crtc->x, crtc->y);
2158                 mutex_unlock(&crtc->mutex);
2159         }
2160 }
2161
2162 static int
2163 intel_finish_fb(struct drm_framebuffer *old_fb)
2164 {
2165         struct drm_i915_gem_object *obj = to_intel_framebuffer(old_fb)->obj;
2166         struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
2167         bool was_interruptible = dev_priv->mm.interruptible;
2168         int ret;
2169
2170         /* Big Hammer, we also need to ensure that any pending
2171          * MI_WAIT_FOR_EVENT inside a user batch buffer on the
2172          * current scanout is retired before unpinning the old
2173          * framebuffer.
2174          *
2175          * This should only fail upon a hung GPU, in which case we
2176          * can safely continue.
2177          */
2178         dev_priv->mm.interruptible = false;
2179         ret = i915_gem_object_finish_gpu(obj);
2180         dev_priv->mm.interruptible = was_interruptible;
2181
2182         return ret;
2183 }
2184
2185 static void intel_crtc_update_sarea_pos(struct drm_crtc *crtc, int x, int y)
2186 {
2187         struct drm_device *dev = crtc->dev;
2188         struct drm_i915_master_private *master_priv;
2189         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2190
2191         if (!dev->primary->master)
2192                 return;
2193
2194         master_priv = dev->primary->master->driver_priv;
2195         if (!master_priv->sarea_priv)
2196                 return;
2197
2198         switch (intel_crtc->pipe) {
2199         case 0:
2200                 master_priv->sarea_priv->pipeA_x = x;
2201                 master_priv->sarea_priv->pipeA_y = y;
2202                 break;
2203         case 1:
2204                 master_priv->sarea_priv->pipeB_x = x;
2205                 master_priv->sarea_priv->pipeB_y = y;
2206                 break;
2207         default:
2208                 break;
2209         }
2210 }
2211
2212 static int
2213 intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
2214                     struct drm_framebuffer *fb)
2215 {
2216         struct drm_device *dev = crtc->dev;
2217         struct drm_i915_private *dev_priv = dev->dev_private;
2218         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2219         struct drm_framebuffer *old_fb;
2220         int ret;
2221
2222         /* no fb bound */
2223         if (!fb) {
2224                 DRM_ERROR("No FB bound\n");
2225                 return 0;
2226         }
2227
2228         if (intel_crtc->plane > INTEL_INFO(dev)->num_pipes) {
2229                 DRM_ERROR("no plane for crtc: plane %c, num_pipes %d\n",
2230                           plane_name(intel_crtc->plane),
2231                           INTEL_INFO(dev)->num_pipes);
2232                 return -EINVAL;
2233         }
2234
2235         mutex_lock(&dev->struct_mutex);
2236         ret = intel_pin_and_fence_fb_obj(dev,
2237                                          to_intel_framebuffer(fb)->obj,
2238                                          NULL);
2239         if (ret != 0) {
2240                 mutex_unlock(&dev->struct_mutex);
2241                 DRM_ERROR("pin & fence failed\n");
2242                 return ret;
2243         }
2244
2245         /* Update pipe size and adjust fitter if needed */
2246         if (i915_fastboot) {
2247                 I915_WRITE(PIPESRC(intel_crtc->pipe),
2248                            ((crtc->mode.hdisplay - 1) << 16) |
2249                            (crtc->mode.vdisplay - 1));
2250                 if (!intel_crtc->config.pch_pfit.size &&
2251                     (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) ||
2252                      intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))) {
2253                         I915_WRITE(PF_CTL(intel_crtc->pipe), 0);
2254                         I915_WRITE(PF_WIN_POS(intel_crtc->pipe), 0);
2255                         I915_WRITE(PF_WIN_SZ(intel_crtc->pipe), 0);
2256                 }
2257         }
2258
2259         ret = dev_priv->display.update_plane(crtc, fb, x, y);
2260         if (ret) {
2261                 intel_unpin_fb_obj(to_intel_framebuffer(fb)->obj);
2262                 mutex_unlock(&dev->struct_mutex);
2263                 DRM_ERROR("failed to update base address\n");
2264                 return ret;
2265         }
2266
2267         old_fb = crtc->fb;
2268         crtc->fb = fb;
2269         crtc->x = x;
2270         crtc->y = y;
2271
2272         if (old_fb) {
2273                 if (intel_crtc->active && old_fb != fb)
2274                         intel_wait_for_vblank(dev, intel_crtc->pipe);
2275                 intel_unpin_fb_obj(to_intel_framebuffer(old_fb)->obj);
2276         }
2277
2278         intel_update_fbc(dev);
2279         intel_edp_psr_update(dev);
2280         mutex_unlock(&dev->struct_mutex);
2281
2282         intel_crtc_update_sarea_pos(crtc, x, y);
2283
2284         return 0;
2285 }
2286
2287 static void intel_fdi_normal_train(struct drm_crtc *crtc)
2288 {
2289         struct drm_device *dev = crtc->dev;
2290         struct drm_i915_private *dev_priv = dev->dev_private;
2291         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2292         int pipe = intel_crtc->pipe;
2293         u32 reg, temp;
2294
2295         /* enable normal train */
2296         reg = FDI_TX_CTL(pipe);
2297         temp = I915_READ(reg);
2298         if (IS_IVYBRIDGE(dev)) {
2299                 temp &= ~FDI_LINK_TRAIN_NONE_IVB;
2300                 temp |= FDI_LINK_TRAIN_NONE_IVB | FDI_TX_ENHANCE_FRAME_ENABLE;
2301         } else {
2302                 temp &= ~FDI_LINK_TRAIN_NONE;
2303                 temp |= FDI_LINK_TRAIN_NONE | FDI_TX_ENHANCE_FRAME_ENABLE;
2304         }
2305         I915_WRITE(reg, temp);
2306
2307         reg = FDI_RX_CTL(pipe);
2308         temp = I915_READ(reg);
2309         if (HAS_PCH_CPT(dev)) {
2310                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2311                 temp |= FDI_LINK_TRAIN_NORMAL_CPT;
2312         } else {
2313                 temp &= ~FDI_LINK_TRAIN_NONE;
2314                 temp |= FDI_LINK_TRAIN_NONE;
2315         }
2316         I915_WRITE(reg, temp | FDI_RX_ENHANCE_FRAME_ENABLE);
2317
2318         /* wait one idle pattern time */
2319         POSTING_READ(reg);
2320         udelay(1000);
2321
2322         /* IVB wants error correction enabled */
2323         if (IS_IVYBRIDGE(dev))
2324                 I915_WRITE(reg, I915_READ(reg) | FDI_FS_ERRC_ENABLE |
2325                            FDI_FE_ERRC_ENABLE);
2326 }
2327
2328 static bool pipe_has_enabled_pch(struct intel_crtc *intel_crtc)
2329 {
2330         return intel_crtc->base.enabled && intel_crtc->config.has_pch_encoder;
2331 }
2332
2333 static void ivb_modeset_global_resources(struct drm_device *dev)
2334 {
2335         struct drm_i915_private *dev_priv = dev->dev_private;
2336         struct intel_crtc *pipe_B_crtc =
2337                 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[PIPE_B]);
2338         struct intel_crtc *pipe_C_crtc =
2339                 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[PIPE_C]);
2340         uint32_t temp;
2341
2342         /*
2343          * When everything is off disable fdi C so that we could enable fdi B
2344          * with all lanes. Note that we don't care about enabled pipes without
2345          * an enabled pch encoder.
2346          */
2347         if (!pipe_has_enabled_pch(pipe_B_crtc) &&
2348             !pipe_has_enabled_pch(pipe_C_crtc)) {
2349                 WARN_ON(I915_READ(FDI_RX_CTL(PIPE_B)) & FDI_RX_ENABLE);
2350                 WARN_ON(I915_READ(FDI_RX_CTL(PIPE_C)) & FDI_RX_ENABLE);
2351
2352                 temp = I915_READ(SOUTH_CHICKEN1);
2353                 temp &= ~FDI_BC_BIFURCATION_SELECT;
2354                 DRM_DEBUG_KMS("disabling fdi C rx\n");
2355                 I915_WRITE(SOUTH_CHICKEN1, temp);
2356         }
2357 }
2358
2359 /* The FDI link training functions for ILK/Ibexpeak. */
2360 static void ironlake_fdi_link_train(struct drm_crtc *crtc)
2361 {
2362         struct drm_device *dev = crtc->dev;
2363         struct drm_i915_private *dev_priv = dev->dev_private;
2364         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2365         int pipe = intel_crtc->pipe;
2366         int plane = intel_crtc->plane;
2367         u32 reg, temp, tries;
2368
2369         /* FDI needs bits from pipe & plane first */
2370         assert_pipe_enabled(dev_priv, pipe);
2371         assert_plane_enabled(dev_priv, plane);
2372
2373         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2374            for train result */
2375         reg = FDI_RX_IMR(pipe);
2376         temp = I915_READ(reg);
2377         temp &= ~FDI_RX_SYMBOL_LOCK;
2378         temp &= ~FDI_RX_BIT_LOCK;
2379         I915_WRITE(reg, temp);
2380         I915_READ(reg);
2381         udelay(150);
2382
2383         /* enable CPU FDI TX and PCH FDI RX */
2384         reg = FDI_TX_CTL(pipe);
2385         temp = I915_READ(reg);
2386         temp &= ~FDI_DP_PORT_WIDTH_MASK;
2387         temp |= FDI_DP_PORT_WIDTH(intel_crtc->config.fdi_lanes);
2388         temp &= ~FDI_LINK_TRAIN_NONE;
2389         temp |= FDI_LINK_TRAIN_PATTERN_1;
2390         I915_WRITE(reg, temp | FDI_TX_ENABLE);
2391
2392         reg = FDI_RX_CTL(pipe);
2393         temp = I915_READ(reg);
2394         temp &= ~FDI_LINK_TRAIN_NONE;
2395         temp |= FDI_LINK_TRAIN_PATTERN_1;
2396         I915_WRITE(reg, temp | FDI_RX_ENABLE);
2397
2398         POSTING_READ(reg);
2399         udelay(150);
2400
2401         /* Ironlake workaround, enable clock pointer after FDI enable*/
2402         I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR);
2403         I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR |
2404                    FDI_RX_PHASE_SYNC_POINTER_EN);
2405
2406         reg = FDI_RX_IIR(pipe);
2407         for (tries = 0; tries < 5; tries++) {
2408                 temp = I915_READ(reg);
2409                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2410
2411                 if ((temp & FDI_RX_BIT_LOCK)) {
2412                         DRM_DEBUG_KMS("FDI train 1 done.\n");
2413                         I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2414                         break;
2415                 }
2416         }
2417         if (tries == 5)
2418                 DRM_ERROR("FDI train 1 fail!\n");
2419
2420         /* Train 2 */
2421         reg = FDI_TX_CTL(pipe);
2422         temp = I915_READ(reg);
2423         temp &= ~FDI_LINK_TRAIN_NONE;
2424         temp |= FDI_LINK_TRAIN_PATTERN_2;
2425         I915_WRITE(reg, temp);
2426
2427         reg = FDI_RX_CTL(pipe);
2428         temp = I915_READ(reg);
2429         temp &= ~FDI_LINK_TRAIN_NONE;
2430         temp |= FDI_LINK_TRAIN_PATTERN_2;
2431         I915_WRITE(reg, temp);
2432
2433         POSTING_READ(reg);
2434         udelay(150);
2435
2436         reg = FDI_RX_IIR(pipe);
2437         for (tries = 0; tries < 5; tries++) {
2438                 temp = I915_READ(reg);
2439                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2440
2441                 if (temp & FDI_RX_SYMBOL_LOCK) {
2442                         I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2443                         DRM_DEBUG_KMS("FDI train 2 done.\n");
2444                         break;
2445                 }
2446         }
2447         if (tries == 5)
2448                 DRM_ERROR("FDI train 2 fail!\n");
2449
2450         DRM_DEBUG_KMS("FDI train done\n");
2451
2452 }
2453
2454 static const int snb_b_fdi_train_param[] = {
2455         FDI_LINK_TRAIN_400MV_0DB_SNB_B,
2456         FDI_LINK_TRAIN_400MV_6DB_SNB_B,
2457         FDI_LINK_TRAIN_600MV_3_5DB_SNB_B,
2458         FDI_LINK_TRAIN_800MV_0DB_SNB_B,
2459 };
2460
2461 /* The FDI link training functions for SNB/Cougarpoint. */
2462 static void gen6_fdi_link_train(struct drm_crtc *crtc)
2463 {
2464         struct drm_device *dev = crtc->dev;
2465         struct drm_i915_private *dev_priv = dev->dev_private;
2466         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2467         int pipe = intel_crtc->pipe;
2468         u32 reg, temp, i, retry;
2469
2470         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2471            for train result */
2472         reg = FDI_RX_IMR(pipe);
2473         temp = I915_READ(reg);
2474         temp &= ~FDI_RX_SYMBOL_LOCK;
2475         temp &= ~FDI_RX_BIT_LOCK;
2476         I915_WRITE(reg, temp);
2477
2478         POSTING_READ(reg);
2479         udelay(150);
2480
2481         /* enable CPU FDI TX and PCH FDI RX */
2482         reg = FDI_TX_CTL(pipe);
2483         temp = I915_READ(reg);
2484         temp &= ~FDI_DP_PORT_WIDTH_MASK;
2485         temp |= FDI_DP_PORT_WIDTH(intel_crtc->config.fdi_lanes);
2486         temp &= ~FDI_LINK_TRAIN_NONE;
2487         temp |= FDI_LINK_TRAIN_PATTERN_1;
2488         temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2489         /* SNB-B */
2490         temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2491         I915_WRITE(reg, temp | FDI_TX_ENABLE);
2492
2493         I915_WRITE(FDI_RX_MISC(pipe),
2494                    FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
2495
2496         reg = FDI_RX_CTL(pipe);
2497         temp = I915_READ(reg);
2498         if (HAS_PCH_CPT(dev)) {
2499                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2500                 temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2501         } else {
2502                 temp &= ~FDI_LINK_TRAIN_NONE;
2503                 temp |= FDI_LINK_TRAIN_PATTERN_1;
2504         }
2505         I915_WRITE(reg, temp | FDI_RX_ENABLE);
2506
2507         POSTING_READ(reg);
2508         udelay(150);
2509
2510         for (i = 0; i < 4; i++) {
2511                 reg = FDI_TX_CTL(pipe);
2512                 temp = I915_READ(reg);
2513                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2514                 temp |= snb_b_fdi_train_param[i];
2515                 I915_WRITE(reg, temp);
2516
2517                 POSTING_READ(reg);
2518                 udelay(500);
2519
2520                 for (retry = 0; retry < 5; retry++) {
2521                         reg = FDI_RX_IIR(pipe);
2522                         temp = I915_READ(reg);
2523                         DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2524                         if (temp & FDI_RX_BIT_LOCK) {
2525                                 I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2526                                 DRM_DEBUG_KMS("FDI train 1 done.\n");
2527                                 break;
2528                         }
2529                         udelay(50);
2530                 }
2531                 if (retry < 5)
2532                         break;
2533         }
2534         if (i == 4)
2535                 DRM_ERROR("FDI train 1 fail!\n");
2536
2537         /* Train 2 */
2538         reg = FDI_TX_CTL(pipe);
2539         temp = I915_READ(reg);
2540         temp &= ~FDI_LINK_TRAIN_NONE;
2541         temp |= FDI_LINK_TRAIN_PATTERN_2;
2542         if (IS_GEN6(dev)) {
2543                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2544                 /* SNB-B */
2545                 temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2546         }
2547         I915_WRITE(reg, temp);
2548
2549         reg = FDI_RX_CTL(pipe);
2550         temp = I915_READ(reg);
2551         if (HAS_PCH_CPT(dev)) {
2552                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2553                 temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
2554         } else {
2555                 temp &= ~FDI_LINK_TRAIN_NONE;
2556                 temp |= FDI_LINK_TRAIN_PATTERN_2;
2557         }
2558         I915_WRITE(reg, temp);
2559
2560         POSTING_READ(reg);
2561         udelay(150);
2562
2563         for (i = 0; i < 4; i++) {
2564                 reg = FDI_TX_CTL(pipe);
2565                 temp = I915_READ(reg);
2566                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2567                 temp |= snb_b_fdi_train_param[i];
2568                 I915_WRITE(reg, temp);
2569
2570                 POSTING_READ(reg);
2571                 udelay(500);
2572
2573                 for (retry = 0; retry < 5; retry++) {
2574                         reg = FDI_RX_IIR(pipe);
2575                         temp = I915_READ(reg);
2576                         DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2577                         if (temp & FDI_RX_SYMBOL_LOCK) {
2578                                 I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2579                                 DRM_DEBUG_KMS("FDI train 2 done.\n");
2580                                 break;
2581                         }
2582                         udelay(50);
2583                 }
2584                 if (retry < 5)
2585                         break;
2586         }
2587         if (i == 4)
2588                 DRM_ERROR("FDI train 2 fail!\n");
2589
2590         DRM_DEBUG_KMS("FDI train done.\n");
2591 }
2592
2593 /* Manual link training for Ivy Bridge A0 parts */
2594 static void ivb_manual_fdi_link_train(struct drm_crtc *crtc)
2595 {
2596         struct drm_device *dev = crtc->dev;
2597         struct drm_i915_private *dev_priv = dev->dev_private;
2598         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2599         int pipe = intel_crtc->pipe;
2600         u32 reg, temp, i, j;
2601
2602         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2603            for train result */
2604         reg = FDI_RX_IMR(pipe);
2605         temp = I915_READ(reg);
2606         temp &= ~FDI_RX_SYMBOL_LOCK;
2607         temp &= ~FDI_RX_BIT_LOCK;
2608         I915_WRITE(reg, temp);
2609
2610         POSTING_READ(reg);
2611         udelay(150);
2612
2613         DRM_DEBUG_KMS("FDI_RX_IIR before link train 0x%x\n",
2614                       I915_READ(FDI_RX_IIR(pipe)));
2615
2616         /* Try each vswing and preemphasis setting twice before moving on */
2617         for (j = 0; j < ARRAY_SIZE(snb_b_fdi_train_param) * 2; j++) {
2618                 /* disable first in case we need to retry */
2619                 reg = FDI_TX_CTL(pipe);
2620                 temp = I915_READ(reg);
2621                 temp &= ~(FDI_LINK_TRAIN_AUTO | FDI_LINK_TRAIN_NONE_IVB);
2622                 temp &= ~FDI_TX_ENABLE;
2623                 I915_WRITE(reg, temp);
2624
2625                 reg = FDI_RX_CTL(pipe);
2626                 temp = I915_READ(reg);
2627                 temp &= ~FDI_LINK_TRAIN_AUTO;
2628                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2629                 temp &= ~FDI_RX_ENABLE;
2630                 I915_WRITE(reg, temp);
2631
2632                 /* enable CPU FDI TX and PCH FDI RX */
2633                 reg = FDI_TX_CTL(pipe);
2634                 temp = I915_READ(reg);
2635                 temp &= ~FDI_DP_PORT_WIDTH_MASK;
2636                 temp |= FDI_DP_PORT_WIDTH(intel_crtc->config.fdi_lanes);
2637                 temp |= FDI_LINK_TRAIN_PATTERN_1_IVB;
2638                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2639                 temp |= snb_b_fdi_train_param[j/2];
2640                 temp |= FDI_COMPOSITE_SYNC;
2641                 I915_WRITE(reg, temp | FDI_TX_ENABLE);
2642
2643                 I915_WRITE(FDI_RX_MISC(pipe),
2644                            FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
2645
2646                 reg = FDI_RX_CTL(pipe);
2647                 temp = I915_READ(reg);
2648                 temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2649                 temp |= FDI_COMPOSITE_SYNC;
2650                 I915_WRITE(reg, temp | FDI_RX_ENABLE);
2651
2652                 POSTING_READ(reg);
2653                 udelay(1); /* should be 0.5us */
2654
2655                 for (i = 0; i < 4; i++) {
2656                         reg = FDI_RX_IIR(pipe);
2657                         temp = I915_READ(reg);
2658                         DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2659
2660                         if (temp & FDI_RX_BIT_LOCK ||
2661                             (I915_READ(reg) & FDI_RX_BIT_LOCK)) {
2662                                 I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2663                                 DRM_DEBUG_KMS("FDI train 1 done, level %i.\n",
2664                                               i);
2665                                 break;
2666                         }
2667                         udelay(1); /* should be 0.5us */
2668                 }
2669                 if (i == 4) {
2670                         DRM_DEBUG_KMS("FDI train 1 fail on vswing %d\n", j / 2);
2671                         continue;
2672                 }
2673
2674                 /* Train 2 */
2675                 reg = FDI_TX_CTL(pipe);
2676                 temp = I915_READ(reg);
2677                 temp &= ~FDI_LINK_TRAIN_NONE_IVB;
2678                 temp |= FDI_LINK_TRAIN_PATTERN_2_IVB;
2679                 I915_WRITE(reg, temp);
2680
2681                 reg = FDI_RX_CTL(pipe);
2682                 temp = I915_READ(reg);
2683                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2684                 temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
2685                 I915_WRITE(reg, temp);
2686
2687                 POSTING_READ(reg);
2688                 udelay(2); /* should be 1.5us */
2689
2690                 for (i = 0; i < 4; i++) {
2691                         reg = FDI_RX_IIR(pipe);
2692                         temp = I915_READ(reg);
2693                         DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2694
2695                         if (temp & FDI_RX_SYMBOL_LOCK ||
2696                             (I915_READ(reg) & FDI_RX_SYMBOL_LOCK)) {
2697                                 I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2698                                 DRM_DEBUG_KMS("FDI train 2 done, level %i.\n",
2699                                               i);
2700                                 goto train_done;
2701                         }
2702                         udelay(2); /* should be 1.5us */
2703                 }
2704                 if (i == 4)
2705                         DRM_DEBUG_KMS("FDI train 2 fail on vswing %d\n", j / 2);
2706         }
2707
2708 train_done:
2709         DRM_DEBUG_KMS("FDI train done.\n");
2710 }
2711
2712 static void ironlake_fdi_pll_enable(struct intel_crtc *intel_crtc)
2713 {
2714         struct drm_device *dev = intel_crtc->base.dev;
2715         struct drm_i915_private *dev_priv = dev->dev_private;
2716         int pipe = intel_crtc->pipe;
2717         u32 reg, temp;
2718
2719
2720         /* enable PCH FDI RX PLL, wait warmup plus DMI latency */
2721         reg = FDI_RX_CTL(pipe);
2722         temp = I915_READ(reg);
2723         temp &= ~(FDI_DP_PORT_WIDTH_MASK | (0x7 << 16));
2724         temp |= FDI_DP_PORT_WIDTH(intel_crtc->config.fdi_lanes);
2725         temp |= (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
2726         I915_WRITE(reg, temp | FDI_RX_PLL_ENABLE);
2727
2728         POSTING_READ(reg);
2729         udelay(200);
2730
2731         /* Switch from Rawclk to PCDclk */
2732         temp = I915_READ(reg);
2733         I915_WRITE(reg, temp | FDI_PCDCLK);
2734
2735         POSTING_READ(reg);
2736         udelay(200);
2737
2738         /* Enable CPU FDI TX PLL, always on for Ironlake */
2739         reg = FDI_TX_CTL(pipe);
2740         temp = I915_READ(reg);
2741         if ((temp & FDI_TX_PLL_ENABLE) == 0) {
2742                 I915_WRITE(reg, temp | FDI_TX_PLL_ENABLE);
2743
2744                 POSTING_READ(reg);
2745                 udelay(100);
2746         }
2747 }
2748
2749 static void ironlake_fdi_pll_disable(struct intel_crtc *intel_crtc)
2750 {
2751         struct drm_device *dev = intel_crtc->base.dev;
2752         struct drm_i915_private *dev_priv = dev->dev_private;
2753         int pipe = intel_crtc->pipe;
2754         u32 reg, temp;
2755
2756         /* Switch from PCDclk to Rawclk */
2757         reg = FDI_RX_CTL(pipe);
2758         temp = I915_READ(reg);
2759         I915_WRITE(reg, temp & ~FDI_PCDCLK);
2760
2761         /* Disable CPU FDI TX PLL */
2762         reg = FDI_TX_CTL(pipe);
2763         temp = I915_READ(reg);
2764         I915_WRITE(reg, temp & ~FDI_TX_PLL_ENABLE);
2765
2766         POSTING_READ(reg);
2767         udelay(100);
2768
2769         reg = FDI_RX_CTL(pipe);
2770         temp = I915_READ(reg);
2771         I915_WRITE(reg, temp & ~FDI_RX_PLL_ENABLE);
2772
2773         /* Wait for the clocks to turn off. */
2774         POSTING_READ(reg);
2775         udelay(100);
2776 }
2777
2778 static void ironlake_fdi_disable(struct drm_crtc *crtc)
2779 {
2780         struct drm_device *dev = crtc->dev;
2781         struct drm_i915_private *dev_priv = dev->dev_private;
2782         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2783         int pipe = intel_crtc->pipe;
2784         u32 reg, temp;
2785
2786         /* disable CPU FDI tx and PCH FDI rx */
2787         reg = FDI_TX_CTL(pipe);
2788         temp = I915_READ(reg);
2789         I915_WRITE(reg, temp & ~FDI_TX_ENABLE);
2790         POSTING_READ(reg);
2791
2792         reg = FDI_RX_CTL(pipe);
2793         temp = I915_READ(reg);
2794         temp &= ~(0x7 << 16);
2795         temp |= (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
2796         I915_WRITE(reg, temp & ~FDI_RX_ENABLE);
2797
2798         POSTING_READ(reg);
2799         udelay(100);
2800
2801         /* Ironlake workaround, disable clock pointer after downing FDI */
2802         if (HAS_PCH_IBX(dev)) {
2803                 I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR);
2804         }
2805
2806         /* still set train pattern 1 */
2807         reg = FDI_TX_CTL(pipe);
2808         temp = I915_READ(reg);
2809         temp &= ~FDI_LINK_TRAIN_NONE;
2810         temp |= FDI_LINK_TRAIN_PATTERN_1;
2811         I915_WRITE(reg, temp);
2812
2813         reg = FDI_RX_CTL(pipe);
2814         temp = I915_READ(reg);
2815         if (HAS_PCH_CPT(dev)) {
2816                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2817                 temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2818         } else {
2819                 temp &= ~FDI_LINK_TRAIN_NONE;
2820                 temp |= FDI_LINK_TRAIN_PATTERN_1;
2821         }
2822         /* BPC in FDI rx is consistent with that in PIPECONF */
2823         temp &= ~(0x07 << 16);
2824         temp |= (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
2825         I915_WRITE(reg, temp);
2826
2827         POSTING_READ(reg);
2828         udelay(100);
2829 }
2830
2831 static bool intel_crtc_has_pending_flip(struct drm_crtc *crtc)
2832 {
2833         struct drm_device *dev = crtc->dev;
2834         struct drm_i915_private *dev_priv = dev->dev_private;
2835         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2836         unsigned long flags;
2837         bool pending;
2838
2839         if (i915_reset_in_progress(&dev_priv->gpu_error) ||
2840             intel_crtc->reset_counter != atomic_read(&dev_priv->gpu_error.reset_counter))
2841                 return false;
2842
2843         spin_lock_irqsave(&dev->event_lock, flags);
2844         pending = to_intel_crtc(crtc)->unpin_work != NULL;
2845         spin_unlock_irqrestore(&dev->event_lock, flags);
2846
2847         return pending;
2848 }
2849
2850 static void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc)
2851 {
2852         struct drm_device *dev = crtc->dev;
2853         struct drm_i915_private *dev_priv = dev->dev_private;
2854
2855         if (crtc->fb == NULL)
2856                 return;
2857
2858         WARN_ON(waitqueue_active(&dev_priv->pending_flip_queue));
2859
2860         wait_event(dev_priv->pending_flip_queue,
2861                    !intel_crtc_has_pending_flip(crtc));
2862
2863         mutex_lock(&dev->struct_mutex);
2864         intel_finish_fb(crtc->fb);
2865         mutex_unlock(&dev->struct_mutex);
2866 }
2867
2868 /* Program iCLKIP clock to the desired frequency */
2869 static void lpt_program_iclkip(struct drm_crtc *crtc)
2870 {
2871         struct drm_device *dev = crtc->dev;
2872         struct drm_i915_private *dev_priv = dev->dev_private;
2873         u32 divsel, phaseinc, auxdiv, phasedir = 0;
2874         u32 temp;
2875
2876         mutex_lock(&dev_priv->dpio_lock);
2877
2878         /* It is necessary to ungate the pixclk gate prior to programming
2879          * the divisors, and gate it back when it is done.
2880          */
2881         I915_WRITE(PIXCLK_GATE, PIXCLK_GATE_GATE);
2882
2883         /* Disable SSCCTL */
2884         intel_sbi_write(dev_priv, SBI_SSCCTL6,
2885                         intel_sbi_read(dev_priv, SBI_SSCCTL6, SBI_ICLK) |
2886                                 SBI_SSCCTL_DISABLE,
2887                         SBI_ICLK);
2888
2889         /* 20MHz is a corner case which is out of range for the 7-bit divisor */
2890         if (crtc->mode.clock == 20000) {
2891                 auxdiv = 1;
2892                 divsel = 0x41;
2893                 phaseinc = 0x20;
2894         } else {
2895                 /* The iCLK virtual clock root frequency is in MHz,
2896                  * but the crtc->mode.clock in in KHz. To get the divisors,
2897                  * it is necessary to divide one by another, so we
2898                  * convert the virtual clock precision to KHz here for higher
2899                  * precision.
2900                  */
2901                 u32 iclk_virtual_root_freq = 172800 * 1000;
2902                 u32 iclk_pi_range = 64;
2903                 u32 desired_divisor, msb_divisor_value, pi_value;
2904
2905                 desired_divisor = (iclk_virtual_root_freq / crtc->mode.clock);
2906                 msb_divisor_value = desired_divisor / iclk_pi_range;
2907                 pi_value = desired_divisor % iclk_pi_range;
2908
2909                 auxdiv = 0;
2910                 divsel = msb_divisor_value - 2;
2911                 phaseinc = pi_value;
2912         }
2913
2914         /* This should not happen with any sane values */
2915         WARN_ON(SBI_SSCDIVINTPHASE_DIVSEL(divsel) &
2916                 ~SBI_SSCDIVINTPHASE_DIVSEL_MASK);
2917         WARN_ON(SBI_SSCDIVINTPHASE_DIR(phasedir) &
2918                 ~SBI_SSCDIVINTPHASE_INCVAL_MASK);
2919
2920         DRM_DEBUG_KMS("iCLKIP clock: found settings for %dKHz refresh rate: auxdiv=%x, divsel=%x, phasedir=%x, phaseinc=%x\n",
2921                         crtc->mode.clock,
2922                         auxdiv,
2923                         divsel,
2924                         phasedir,
2925                         phaseinc);
2926
2927         /* Program SSCDIVINTPHASE6 */
2928         temp = intel_sbi_read(dev_priv, SBI_SSCDIVINTPHASE6, SBI_ICLK);
2929         temp &= ~SBI_SSCDIVINTPHASE_DIVSEL_MASK;
2930         temp |= SBI_SSCDIVINTPHASE_DIVSEL(divsel);
2931         temp &= ~SBI_SSCDIVINTPHASE_INCVAL_MASK;
2932         temp |= SBI_SSCDIVINTPHASE_INCVAL(phaseinc);
2933         temp |= SBI_SSCDIVINTPHASE_DIR(phasedir);
2934         temp |= SBI_SSCDIVINTPHASE_PROPAGATE;
2935         intel_sbi_write(dev_priv, SBI_SSCDIVINTPHASE6, temp, SBI_ICLK);
2936
2937         /* Program SSCAUXDIV */
2938         temp = intel_sbi_read(dev_priv, SBI_SSCAUXDIV6, SBI_ICLK);
2939         temp &= ~SBI_SSCAUXDIV_FINALDIV2SEL(1);
2940         temp |= SBI_SSCAUXDIV_FINALDIV2SEL(auxdiv);
2941         intel_sbi_write(dev_priv, SBI_SSCAUXDIV6, temp, SBI_ICLK);
2942
2943         /* Enable modulator and associated divider */
2944         temp = intel_sbi_read(dev_priv, SBI_SSCCTL6, SBI_ICLK);
2945         temp &= ~SBI_SSCCTL_DISABLE;
2946         intel_sbi_write(dev_priv, SBI_SSCCTL6, temp, SBI_ICLK);
2947
2948         /* Wait for initialization time */
2949         udelay(24);
2950
2951         I915_WRITE(PIXCLK_GATE, PIXCLK_GATE_UNGATE);
2952
2953         mutex_unlock(&dev_priv->dpio_lock);
2954 }
2955
2956 static void ironlake_pch_transcoder_set_timings(struct intel_crtc *crtc,
2957                                                 enum pipe pch_transcoder)
2958 {
2959         struct drm_device *dev = crtc->base.dev;
2960         struct drm_i915_private *dev_priv = dev->dev_private;
2961         enum transcoder cpu_transcoder = crtc->config.cpu_transcoder;
2962
2963         I915_WRITE(PCH_TRANS_HTOTAL(pch_transcoder),
2964                    I915_READ(HTOTAL(cpu_transcoder)));
2965         I915_WRITE(PCH_TRANS_HBLANK(pch_transcoder),
2966                    I915_READ(HBLANK(cpu_transcoder)));
2967         I915_WRITE(PCH_TRANS_HSYNC(pch_transcoder),
2968                    I915_READ(HSYNC(cpu_transcoder)));
2969
2970         I915_WRITE(PCH_TRANS_VTOTAL(pch_transcoder),
2971                    I915_READ(VTOTAL(cpu_transcoder)));
2972         I915_WRITE(PCH_TRANS_VBLANK(pch_transcoder),
2973                    I915_READ(VBLANK(cpu_transcoder)));
2974         I915_WRITE(PCH_TRANS_VSYNC(pch_transcoder),
2975                    I915_READ(VSYNC(cpu_transcoder)));
2976         I915_WRITE(PCH_TRANS_VSYNCSHIFT(pch_transcoder),
2977                    I915_READ(VSYNCSHIFT(cpu_transcoder)));
2978 }
2979
2980 /*
2981  * Enable PCH resources required for PCH ports:
2982  *   - PCH PLLs
2983  *   - FDI training & RX/TX
2984  *   - update transcoder timings
2985  *   - DP transcoding bits
2986  *   - transcoder
2987  */
2988 static void ironlake_pch_enable(struct drm_crtc *crtc)
2989 {
2990         struct drm_device *dev = crtc->dev;
2991         struct drm_i915_private *dev_priv = dev->dev_private;
2992         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2993         int pipe = intel_crtc->pipe;
2994         u32 reg, temp;
2995
2996         assert_pch_transcoder_disabled(dev_priv, pipe);
2997
2998         /* Write the TU size bits before fdi link training, so that error
2999          * detection works. */
3000         I915_WRITE(FDI_RX_TUSIZE1(pipe),
3001                    I915_READ(PIPE_DATA_M1(pipe)) & TU_SIZE_MASK);
3002
3003         /* For PCH output, training FDI link */
3004         dev_priv->display.fdi_link_train(crtc);
3005
3006         /* We need to program the right clock selection before writing the pixel
3007          * mutliplier into the DPLL. */
3008         if (HAS_PCH_CPT(dev)) {
3009                 u32 sel;
3010
3011                 temp = I915_READ(PCH_DPLL_SEL);
3012                 temp |= TRANS_DPLL_ENABLE(pipe);
3013                 sel = TRANS_DPLLB_SEL(pipe);
3014                 if (intel_crtc->config.shared_dpll == DPLL_ID_PCH_PLL_B)
3015                         temp |= sel;
3016                 else
3017                         temp &= ~sel;
3018                 I915_WRITE(PCH_DPLL_SEL, temp);
3019         }
3020
3021         /* XXX: pch pll's can be enabled any time before we enable the PCH
3022          * transcoder, and we actually should do this to not upset any PCH
3023          * transcoder that already use the clock when we share it.
3024          *
3025          * Note that enable_shared_dpll tries to do the right thing, but
3026          * get_shared_dpll unconditionally resets the pll - we need that to have
3027          * the right LVDS enable sequence. */
3028         ironlake_enable_shared_dpll(intel_crtc);
3029
3030         /* set transcoder timing, panel must allow it */
3031         assert_panel_unlocked(dev_priv, pipe);
3032         ironlake_pch_transcoder_set_timings(intel_crtc, pipe);
3033
3034         intel_fdi_normal_train(crtc);
3035
3036         /* For PCH DP, enable TRANS_DP_CTL */
3037         if (HAS_PCH_CPT(dev) &&
3038             (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT) ||
3039              intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))) {
3040                 u32 bpc = (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) >> 5;
3041                 reg = TRANS_DP_CTL(pipe);
3042                 temp = I915_READ(reg);
3043                 temp &= ~(TRANS_DP_PORT_SEL_MASK |
3044                           TRANS_DP_SYNC_MASK |
3045                           TRANS_DP_BPC_MASK);
3046                 temp |= (TRANS_DP_OUTPUT_ENABLE |
3047                          TRANS_DP_ENH_FRAMING);
3048                 temp |= bpc << 9; /* same format but at 11:9 */
3049
3050                 if (crtc->mode.flags & DRM_MODE_FLAG_PHSYNC)
3051                         temp |= TRANS_DP_HSYNC_ACTIVE_HIGH;
3052                 if (crtc->mode.flags & DRM_MODE_FLAG_PVSYNC)
3053                         temp |= TRANS_DP_VSYNC_ACTIVE_HIGH;
3054
3055                 switch (intel_trans_dp_port_sel(crtc)) {
3056                 case PCH_DP_B:
3057                         temp |= TRANS_DP_PORT_SEL_B;
3058                         break;
3059                 case PCH_DP_C:
3060                         temp |= TRANS_DP_PORT_SEL_C;
3061                         break;
3062                 case PCH_DP_D:
3063                         temp |= TRANS_DP_PORT_SEL_D;
3064                         break;
3065                 default:
3066                         BUG();
3067                 }
3068
3069                 I915_WRITE(reg, temp);
3070         }
3071
3072         ironlake_enable_pch_transcoder(dev_priv, pipe);
3073 }
3074
3075 static void lpt_pch_enable(struct drm_crtc *crtc)
3076 {
3077         struct drm_device *dev = crtc->dev;
3078         struct drm_i915_private *dev_priv = dev->dev_private;
3079         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3080         enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
3081
3082         assert_pch_transcoder_disabled(dev_priv, TRANSCODER_A);
3083
3084         lpt_program_iclkip(crtc);
3085
3086         /* Set transcoder timing. */
3087         ironlake_pch_transcoder_set_timings(intel_crtc, PIPE_A);
3088
3089         lpt_enable_pch_transcoder(dev_priv, cpu_transcoder);
3090 }
3091
3092 static void intel_put_shared_dpll(struct intel_crtc *crtc)
3093 {
3094         struct intel_shared_dpll *pll = intel_crtc_to_shared_dpll(crtc);
3095
3096         if (pll == NULL)
3097                 return;
3098
3099         if (pll->refcount == 0) {
3100                 WARN(1, "bad %s refcount\n", pll->name);
3101                 return;
3102         }
3103
3104         if (--pll->refcount == 0) {
3105                 WARN_ON(pll->on);
3106                 WARN_ON(pll->active);
3107         }
3108
3109         crtc->config.shared_dpll = DPLL_ID_PRIVATE;
3110 }
3111
3112 static struct intel_shared_dpll *intel_get_shared_dpll(struct intel_crtc *crtc)
3113 {
3114         struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
3115         struct intel_shared_dpll *pll = intel_crtc_to_shared_dpll(crtc);
3116         enum intel_dpll_id i;
3117
3118         if (pll) {
3119                 DRM_DEBUG_KMS("CRTC:%d dropping existing %s\n",
3120                               crtc->base.base.id, pll->name);
3121                 intel_put_shared_dpll(crtc);
3122         }
3123
3124         if (HAS_PCH_IBX(dev_priv->dev)) {
3125                 /* Ironlake PCH has a fixed PLL->PCH pipe mapping. */
3126                 i = (enum intel_dpll_id) crtc->pipe;
3127                 pll = &dev_priv->shared_dplls[i];
3128
3129                 DRM_DEBUG_KMS("CRTC:%d using pre-allocated %s\n",
3130                               crtc->base.base.id, pll->name);
3131
3132                 goto found;
3133         }
3134
3135         for (i = 0; i < dev_priv->num_shared_dpll; i++) {
3136                 pll = &dev_priv->shared_dplls[i];
3137
3138                 /* Only want to check enabled timings first */
3139                 if (pll->refcount == 0)
3140                         continue;
3141
3142                 if (memcmp(&crtc->config.dpll_hw_state, &pll->hw_state,
3143                            sizeof(pll->hw_state)) == 0) {
3144                         DRM_DEBUG_KMS("CRTC:%d sharing existing %s (refcount %d, ative %d)\n",
3145                                       crtc->base.base.id,
3146                                       pll->name, pll->refcount, pll->active);
3147
3148                         goto found;
3149                 }
3150         }
3151
3152         /* Ok no matching timings, maybe there's a free one? */
3153         for (i = 0; i < dev_priv->num_shared_dpll; i++) {
3154                 pll = &dev_priv->shared_dplls[i];
3155                 if (pll->refcount == 0) {
3156                         DRM_DEBUG_KMS("CRTC:%d allocated %s\n",
3157                                       crtc->base.base.id, pll->name);
3158                         goto found;
3159                 }
3160         }
3161
3162         return NULL;
3163
3164 found:
3165         crtc->config.shared_dpll = i;
3166         DRM_DEBUG_DRIVER("using %s for pipe %c\n", pll->name,
3167                          pipe_name(crtc->pipe));
3168
3169         if (pll->active == 0) {
3170                 memcpy(&pll->hw_state, &crtc->config.dpll_hw_state,
3171                        sizeof(pll->hw_state));
3172
3173                 DRM_DEBUG_DRIVER("setting up %s\n", pll->name);
3174                 WARN_ON(pll->on);
3175                 assert_shared_dpll_disabled(dev_priv, pll);
3176
3177                 pll->mode_set(dev_priv, pll);
3178         }
3179         pll->refcount++;
3180
3181         return pll;
3182 }
3183
3184 static void cpt_verify_modeset(struct drm_device *dev, int pipe)
3185 {
3186         struct drm_i915_private *dev_priv = dev->dev_private;
3187         int dslreg = PIPEDSL(pipe);
3188         u32 temp;
3189
3190         temp = I915_READ(dslreg);
3191         udelay(500);
3192         if (wait_for(I915_READ(dslreg) != temp, 5)) {
3193                 if (wait_for(I915_READ(dslreg) != temp, 5))
3194                         DRM_ERROR("mode set failed: pipe %c stuck\n", pipe_name(pipe));
3195         }
3196 }
3197
3198 static void ironlake_pfit_enable(struct intel_crtc *crtc)
3199 {
3200         struct drm_device *dev = crtc->base.dev;
3201         struct drm_i915_private *dev_priv = dev->dev_private;
3202         int pipe = crtc->pipe;
3203
3204         if (crtc->config.pch_pfit.size) {
3205                 /* Force use of hard-coded filter coefficients
3206                  * as some pre-programmed values are broken,
3207                  * e.g. x201.
3208                  */
3209                 if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev))
3210                         I915_WRITE(PF_CTL(pipe), PF_ENABLE | PF_FILTER_MED_3x3 |
3211                                                  PF_PIPE_SEL_IVB(pipe));
3212                 else
3213                         I915_WRITE(PF_CTL(pipe), PF_ENABLE | PF_FILTER_MED_3x3);
3214                 I915_WRITE(PF_WIN_POS(pipe), crtc->config.pch_pfit.pos);
3215                 I915_WRITE(PF_WIN_SZ(pipe), crtc->config.pch_pfit.size);
3216         }
3217 }
3218
3219 static void intel_enable_planes(struct drm_crtc *crtc)
3220 {
3221         struct drm_device *dev = crtc->dev;
3222         enum pipe pipe = to_intel_crtc(crtc)->pipe;
3223         struct intel_plane *intel_plane;
3224
3225         list_for_each_entry(intel_plane, &dev->mode_config.plane_list, base.head)
3226                 if (intel_plane->pipe == pipe)
3227                         intel_plane_restore(&intel_plane->base);
3228 }
3229
3230 static void intel_disable_planes(struct drm_crtc *crtc)
3231 {
3232         struct drm_device *dev = crtc->dev;
3233         enum pipe pipe = to_intel_crtc(crtc)->pipe;
3234         struct intel_plane *intel_plane;
3235
3236         list_for_each_entry(intel_plane, &dev->mode_config.plane_list, base.head)
3237                 if (intel_plane->pipe == pipe)
3238                         intel_plane_disable(&intel_plane->base);
3239 }
3240
3241 static void ironlake_crtc_enable(struct drm_crtc *crtc)
3242 {
3243         struct drm_device *dev = crtc->dev;
3244         struct drm_i915_private *dev_priv = dev->dev_private;
3245         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3246         struct intel_encoder *encoder;
3247         int pipe = intel_crtc->pipe;
3248         int plane = intel_crtc->plane;
3249
3250         WARN_ON(!crtc->enabled);
3251
3252         if (intel_crtc->active)
3253                 return;
3254
3255         intel_crtc->active = true;
3256
3257         intel_set_cpu_fifo_underrun_reporting(dev, pipe, true);
3258         intel_set_pch_fifo_underrun_reporting(dev, pipe, true);
3259
3260         intel_update_watermarks(dev);
3261
3262         for_each_encoder_on_crtc(dev, crtc, encoder)
3263                 if (encoder->pre_enable)
3264                         encoder->pre_enable(encoder);
3265
3266         if (intel_crtc->config.has_pch_encoder) {
3267                 /* Note: FDI PLL enabling _must_ be done before we enable the
3268                  * cpu pipes, hence this is separate from all the other fdi/pch
3269                  * enabling. */
3270                 ironlake_fdi_pll_enable(intel_crtc);
3271         } else {
3272                 assert_fdi_tx_disabled(dev_priv, pipe);
3273                 assert_fdi_rx_disabled(dev_priv, pipe);
3274         }
3275
3276         ironlake_pfit_enable(intel_crtc);
3277
3278         /*
3279          * On ILK+ LUT must be loaded before the pipe is running but with
3280          * clocks enabled
3281          */
3282         intel_crtc_load_lut(crtc);
3283
3284         intel_enable_pipe(dev_priv, pipe,
3285                           intel_crtc->config.has_pch_encoder);
3286         intel_enable_plane(dev_priv, plane, pipe);
3287         intel_enable_planes(crtc);
3288         intel_crtc_update_cursor(crtc, true);
3289
3290         if (intel_crtc->config.has_pch_encoder)
3291                 ironlake_pch_enable(crtc);
3292
3293         mutex_lock(&dev->struct_mutex);
3294         intel_update_fbc(dev);
3295         mutex_unlock(&dev->struct_mutex);
3296
3297         for_each_encoder_on_crtc(dev, crtc, encoder)
3298                 encoder->enable(encoder);
3299
3300         if (HAS_PCH_CPT(dev))
3301                 cpt_verify_modeset(dev, intel_crtc->pipe);
3302
3303         /*
3304          * There seems to be a race in PCH platform hw (at least on some
3305          * outputs) where an enabled pipe still completes any pageflip right
3306          * away (as if the pipe is off) instead of waiting for vblank. As soon
3307          * as the first vblank happend, everything works as expected. Hence just
3308          * wait for one vblank before returning to avoid strange things
3309          * happening.
3310          */
3311         intel_wait_for_vblank(dev, intel_crtc->pipe);
3312 }
3313
3314 /* IPS only exists on ULT machines and is tied to pipe A. */
3315 static bool hsw_crtc_supports_ips(struct intel_crtc *crtc)
3316 {
3317         return HAS_IPS(crtc->base.dev) && crtc->pipe == PIPE_A;
3318 }
3319
3320 static void hsw_enable_ips(struct intel_crtc *crtc)
3321 {
3322         struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
3323
3324         if (!crtc->config.ips_enabled)
3325                 return;
3326
3327         /* We can only enable IPS after we enable a plane and wait for a vblank.
3328          * We guarantee that the plane is enabled by calling intel_enable_ips
3329          * only after intel_enable_plane. And intel_enable_plane already waits
3330          * for a vblank, so all we need to do here is to enable the IPS bit. */
3331         assert_plane_enabled(dev_priv, crtc->plane);
3332         I915_WRITE(IPS_CTL, IPS_ENABLE);
3333 }
3334
3335 static void hsw_disable_ips(struct intel_crtc *crtc)
3336 {
3337         struct drm_device *dev = crtc->base.dev;
3338         struct drm_i915_private *dev_priv = dev->dev_private;
3339
3340         if (!crtc->config.ips_enabled)
3341                 return;
3342
3343         assert_plane_enabled(dev_priv, crtc->plane);
3344         I915_WRITE(IPS_CTL, 0);
3345
3346         /* We need to wait for a vblank before we can disable the plane. */
3347         intel_wait_for_vblank(dev, crtc->pipe);
3348 }
3349
3350 static void haswell_crtc_enable(struct drm_crtc *crtc)
3351 {
3352         struct drm_device *dev = crtc->dev;
3353         struct drm_i915_private *dev_priv = dev->dev_private;
3354         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3355         struct intel_encoder *encoder;
3356         int pipe = intel_crtc->pipe;
3357         int plane = intel_crtc->plane;
3358
3359         WARN_ON(!crtc->enabled);
3360
3361         if (intel_crtc->active)
3362                 return;
3363
3364         intel_crtc->active = true;
3365
3366         intel_set_cpu_fifo_underrun_reporting(dev, pipe, true);
3367         if (intel_crtc->config.has_pch_encoder)
3368                 intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A, true);
3369
3370         intel_update_watermarks(dev);
3371
3372         if (intel_crtc->config.has_pch_encoder)
3373                 dev_priv->display.fdi_link_train(crtc);
3374
3375         for_each_encoder_on_crtc(dev, crtc, encoder)
3376                 if (encoder->pre_enable)
3377                         encoder->pre_enable(encoder);
3378
3379         intel_ddi_enable_pipe_clock(intel_crtc);
3380
3381         ironlake_pfit_enable(intel_crtc);
3382
3383         /*
3384          * On ILK+ LUT must be loaded before the pipe is running but with
3385          * clocks enabled
3386          */
3387         intel_crtc_load_lut(crtc);
3388
3389         intel_ddi_set_pipe_settings(crtc);
3390         intel_ddi_enable_transcoder_func(crtc);
3391
3392         intel_enable_pipe(dev_priv, pipe,
3393                           intel_crtc->config.has_pch_encoder);
3394         intel_enable_plane(dev_priv, plane, pipe);
3395         intel_enable_planes(crtc);
3396         intel_crtc_update_cursor(crtc, true);
3397
3398         hsw_enable_ips(intel_crtc);
3399
3400         if (intel_crtc->config.has_pch_encoder)
3401                 lpt_pch_enable(crtc);
3402
3403         mutex_lock(&dev->struct_mutex);
3404         intel_update_fbc(dev);
3405         mutex_unlock(&dev->struct_mutex);
3406
3407         for_each_encoder_on_crtc(dev, crtc, encoder)
3408                 encoder->enable(encoder);
3409
3410         /*
3411          * There seems to be a race in PCH platform hw (at least on some
3412          * outputs) where an enabled pipe still completes any pageflip right
3413          * away (as if the pipe is off) instead of waiting for vblank. As soon
3414          * as the first vblank happend, everything works as expected. Hence just
3415          * wait for one vblank before returning to avoid strange things
3416          * happening.
3417          */
3418         intel_wait_for_vblank(dev, intel_crtc->pipe);
3419 }
3420
3421 static void ironlake_pfit_disable(struct intel_crtc *crtc)
3422 {
3423         struct drm_device *dev = crtc->base.dev;
3424         struct drm_i915_private *dev_priv = dev->dev_private;
3425         int pipe = crtc->pipe;
3426
3427         /* To avoid upsetting the power well on haswell only disable the pfit if
3428          * it's in use. The hw state code will make sure we get this right. */
3429         if (crtc->config.pch_pfit.size) {
3430                 I915_WRITE(PF_CTL(pipe), 0);
3431                 I915_WRITE(PF_WIN_POS(pipe), 0);
3432                 I915_WRITE(PF_WIN_SZ(pipe), 0);
3433         }
3434 }
3435
3436 static void ironlake_crtc_disable(struct drm_crtc *crtc)
3437 {
3438         struct drm_device *dev = crtc->dev;
3439         struct drm_i915_private *dev_priv = dev->dev_private;
3440         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3441         struct intel_encoder *encoder;
3442         int pipe = intel_crtc->pipe;
3443         int plane = intel_crtc->plane;
3444         u32 reg, temp;
3445
3446
3447         if (!intel_crtc->active)
3448                 return;
3449
3450         for_each_encoder_on_crtc(dev, crtc, encoder)
3451                 encoder->disable(encoder);
3452
3453         intel_crtc_wait_for_pending_flips(crtc);
3454         drm_vblank_off(dev, pipe);
3455
3456         if (dev_priv->fbc.plane == plane)
3457                 intel_disable_fbc(dev);
3458
3459         intel_crtc_update_cursor(crtc, false);
3460         intel_disable_planes(crtc);
3461         intel_disable_plane(dev_priv, plane, pipe);
3462
3463         if (intel_crtc->config.has_pch_encoder)
3464                 intel_set_pch_fifo_underrun_reporting(dev, pipe, false);
3465
3466         intel_disable_pipe(dev_priv, pipe);
3467
3468         ironlake_pfit_disable(intel_crtc);
3469
3470         for_each_encoder_on_crtc(dev, crtc, encoder)
3471                 if (encoder->post_disable)
3472                         encoder->post_disable(encoder);
3473
3474         if (intel_crtc->config.has_pch_encoder) {
3475                 ironlake_fdi_disable(crtc);
3476
3477                 ironlake_disable_pch_transcoder(dev_priv, pipe);
3478                 intel_set_pch_fifo_underrun_reporting(dev, pipe, true);
3479
3480                 if (HAS_PCH_CPT(dev)) {
3481                         /* disable TRANS_DP_CTL */
3482                         reg = TRANS_DP_CTL(pipe);
3483                         temp = I915_READ(reg);
3484                         temp &= ~(TRANS_DP_OUTPUT_ENABLE |
3485                                   TRANS_DP_PORT_SEL_MASK);
3486                         temp |= TRANS_DP_PORT_SEL_NONE;
3487                         I915_WRITE(reg, temp);
3488
3489                         /* disable DPLL_SEL */
3490                         temp = I915_READ(PCH_DPLL_SEL);
3491                         temp &= ~(TRANS_DPLL_ENABLE(pipe) | TRANS_DPLLB_SEL(pipe));
3492                         I915_WRITE(PCH_DPLL_SEL, temp);
3493                 }
3494
3495                 /* disable PCH DPLL */
3496                 intel_disable_shared_dpll(intel_crtc);
3497
3498                 ironlake_fdi_pll_disable(intel_crtc);
3499         }
3500
3501         intel_crtc->active = false;
3502         intel_update_watermarks(dev);
3503
3504         mutex_lock(&dev->struct_mutex);
3505         intel_update_fbc(dev);
3506         mutex_unlock(&dev->struct_mutex);
3507 }
3508
3509 static void haswell_crtc_disable(struct drm_crtc *crtc)
3510 {
3511         struct drm_device *dev = crtc->dev;
3512         struct drm_i915_private *dev_priv = dev->dev_private;
3513         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3514         struct intel_encoder *encoder;
3515         int pipe = intel_crtc->pipe;
3516         int plane = intel_crtc->plane;
3517         enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
3518
3519         if (!intel_crtc->active)
3520                 return;
3521
3522         for_each_encoder_on_crtc(dev, crtc, encoder)
3523                 encoder->disable(encoder);
3524
3525         intel_crtc_wait_for_pending_flips(crtc);
3526         drm_vblank_off(dev, pipe);
3527
3528         /* FBC must be disabled before disabling the plane on HSW. */
3529         if (dev_priv->fbc.plane == plane)
3530                 intel_disable_fbc(dev);
3531
3532         hsw_disable_ips(intel_crtc);
3533
3534         intel_crtc_update_cursor(crtc, false);
3535         intel_disable_planes(crtc);
3536         intel_disable_plane(dev_priv, plane, pipe);
3537
3538         if (intel_crtc->config.has_pch_encoder)
3539                 intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A, false);
3540         intel_disable_pipe(dev_priv, pipe);
3541
3542         intel_ddi_disable_transcoder_func(dev_priv, cpu_transcoder);
3543
3544         ironlake_pfit_disable(intel_crtc);
3545
3546         intel_ddi_disable_pipe_clock(intel_crtc);
3547
3548         for_each_encoder_on_crtc(dev, crtc, encoder)
3549                 if (encoder->post_disable)
3550                         encoder->post_disable(encoder);
3551
3552         if (intel_crtc->config.has_pch_encoder) {
3553                 lpt_disable_pch_transcoder(dev_priv);
3554                 intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A, true);
3555                 intel_ddi_fdi_disable(crtc);
3556         }
3557
3558         intel_crtc->active = false;
3559         intel_update_watermarks(dev);
3560
3561         mutex_lock(&dev->struct_mutex);
3562         intel_update_fbc(dev);
3563         mutex_unlock(&dev->struct_mutex);
3564 }
3565
3566 static void ironlake_crtc_off(struct drm_crtc *crtc)
3567 {
3568         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3569         intel_put_shared_dpll(intel_crtc);
3570 }
3571
3572 static void haswell_crtc_off(struct drm_crtc *crtc)
3573 {
3574         intel_ddi_put_crtc_pll(crtc);
3575 }
3576
3577 static void intel_crtc_dpms_overlay(struct intel_crtc *intel_crtc, bool enable)
3578 {
3579         if (!enable && intel_crtc->overlay) {
3580                 struct drm_device *dev = intel_crtc->base.dev;
3581                 struct drm_i915_private *dev_priv = dev->dev_private;
3582
3583                 mutex_lock(&dev->struct_mutex);
3584                 dev_priv->mm.interruptible = false;
3585                 (void) intel_overlay_switch_off(intel_crtc->overlay);
3586                 dev_priv->mm.interruptible = true;
3587                 mutex_unlock(&dev->struct_mutex);
3588         }
3589
3590         /* Let userspace switch the overlay on again. In most cases userspace
3591          * has to recompute where to put it anyway.
3592          */
3593 }
3594
3595 /**
3596  * i9xx_fixup_plane - ugly workaround for G45 to fire up the hardware
3597  * cursor plane briefly if not already running after enabling the display
3598  * plane.
3599  * This workaround avoids occasional blank screens when self refresh is
3600  * enabled.
3601  */
3602 static void
3603 g4x_fixup_plane(struct drm_i915_private *dev_priv, enum pipe pipe)
3604 {
3605         u32 cntl = I915_READ(CURCNTR(pipe));
3606
3607         if ((cntl & CURSOR_MODE) == 0) {
3608                 u32 fw_bcl_self = I915_READ(FW_BLC_SELF);
3609
3610                 I915_WRITE(FW_BLC_SELF, fw_bcl_self & ~FW_BLC_SELF_EN);
3611                 I915_WRITE(CURCNTR(pipe), CURSOR_MODE_64_ARGB_AX);
3612                 intel_wait_for_vblank(dev_priv->dev, pipe);
3613                 I915_WRITE(CURCNTR(pipe), cntl);
3614                 I915_WRITE(CURBASE(pipe), I915_READ(CURBASE(pipe)));
3615                 I915_WRITE(FW_BLC_SELF, fw_bcl_self);
3616         }
3617 }
3618
3619 static void i9xx_pfit_enable(struct intel_crtc *crtc)
3620 {
3621         struct drm_device *dev = crtc->base.dev;
3622         struct drm_i915_private *dev_priv = dev->dev_private;
3623         struct intel_crtc_config *pipe_config = &crtc->config;
3624
3625         if (!crtc->config.gmch_pfit.control)
3626                 return;
3627
3628         /*
3629          * The panel fitter should only be adjusted whilst the pipe is disabled,
3630          * according to register description and PRM.
3631          */
3632         WARN_ON(I915_READ(PFIT_CONTROL) & PFIT_ENABLE);
3633         assert_pipe_disabled(dev_priv, crtc->pipe);
3634
3635         I915_WRITE(PFIT_PGM_RATIOS, pipe_config->gmch_pfit.pgm_ratios);
3636         I915_WRITE(PFIT_CONTROL, pipe_config->gmch_pfit.control);
3637
3638         /* Border color in case we don't scale up to the full screen. Black by
3639          * default, change to something else for debugging. */
3640         I915_WRITE(BCLRPAT(crtc->pipe), 0);
3641 }
3642
3643 static void valleyview_crtc_enable(struct drm_crtc *crtc)
3644 {
3645         struct drm_device *dev = crtc->dev;
3646         struct drm_i915_private *dev_priv = dev->dev_private;
3647         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3648         struct intel_encoder *encoder;
3649         int pipe = intel_crtc->pipe;
3650         int plane = intel_crtc->plane;
3651
3652         WARN_ON(!crtc->enabled);
3653
3654         if (intel_crtc->active)
3655                 return;
3656
3657         intel_crtc->active = true;
3658         intel_update_watermarks(dev);
3659
3660         for_each_encoder_on_crtc(dev, crtc, encoder)
3661                 if (encoder->pre_pll_enable)
3662                         encoder->pre_pll_enable(encoder);
3663
3664         vlv_enable_pll(intel_crtc);
3665
3666         for_each_encoder_on_crtc(dev, crtc, encoder)
3667                 if (encoder->pre_enable)
3668                         encoder->pre_enable(encoder);
3669
3670         i9xx_pfit_enable(intel_crtc);
3671
3672         intel_crtc_load_lut(crtc);
3673
3674         intel_enable_pipe(dev_priv, pipe, false);
3675         intel_enable_plane(dev_priv, plane, pipe);
3676         intel_enable_planes(crtc);
3677         intel_crtc_update_cursor(crtc, true);
3678
3679         intel_update_fbc(dev);
3680
3681         for_each_encoder_on_crtc(dev, crtc, encoder)
3682                 encoder->enable(encoder);
3683 }
3684
3685 static void i9xx_crtc_enable(struct drm_crtc *crtc)
3686 {
3687         struct drm_device *dev = crtc->dev;
3688         struct drm_i915_private *dev_priv = dev->dev_private;
3689         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3690         struct intel_encoder *encoder;
3691         int pipe = intel_crtc->pipe;
3692         int plane = intel_crtc->plane;
3693
3694         WARN_ON(!crtc->enabled);
3695
3696         if (intel_crtc->active)
3697                 return;
3698
3699         intel_crtc->active = true;
3700         intel_update_watermarks(dev);
3701
3702         for_each_encoder_on_crtc(dev, crtc, encoder)
3703                 if (encoder->pre_enable)
3704                         encoder->pre_enable(encoder);
3705
3706         i9xx_enable_pll(intel_crtc);
3707
3708         i9xx_pfit_enable(intel_crtc);
3709
3710         intel_crtc_load_lut(crtc);
3711
3712         intel_enable_pipe(dev_priv, pipe, false);
3713         intel_enable_plane(dev_priv, plane, pipe);
3714         intel_enable_planes(crtc);
3715         /* The fixup needs to happen before cursor is enabled */
3716         if (IS_G4X(dev))
3717                 g4x_fixup_plane(dev_priv, pipe);
3718         intel_crtc_update_cursor(crtc, true);
3719
3720         /* Give the overlay scaler a chance to enable if it's on this pipe */
3721         intel_crtc_dpms_overlay(intel_crtc, true);
3722
3723         intel_update_fbc(dev);
3724
3725         for_each_encoder_on_crtc(dev, crtc, encoder)
3726                 encoder->enable(encoder);
3727 }
3728
3729 static void i9xx_pfit_disable(struct intel_crtc *crtc)
3730 {
3731         struct drm_device *dev = crtc->base.dev;
3732         struct drm_i915_private *dev_priv = dev->dev_private;
3733
3734         if (!crtc->config.gmch_pfit.control)
3735                 return;
3736
3737         assert_pipe_disabled(dev_priv, crtc->pipe);
3738
3739         DRM_DEBUG_DRIVER("disabling pfit, current: 0x%08x\n",
3740                          I915_READ(PFIT_CONTROL));
3741         I915_WRITE(PFIT_CONTROL, 0);
3742 }
3743
3744 static void i9xx_crtc_disable(struct drm_crtc *crtc)
3745 {
3746         struct drm_device *dev = crtc->dev;
3747         struct drm_i915_private *dev_priv = dev->dev_private;
3748         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3749         struct intel_encoder *encoder;
3750         int pipe = intel_crtc->pipe;
3751         int plane = intel_crtc->plane;
3752
3753         if (!intel_crtc->active)
3754                 return;
3755
3756         for_each_encoder_on_crtc(dev, crtc, encoder)
3757                 encoder->disable(encoder);
3758
3759         /* Give the overlay scaler a chance to disable if it's on this pipe */
3760         intel_crtc_wait_for_pending_flips(crtc);
3761         drm_vblank_off(dev, pipe);
3762
3763         if (dev_priv->fbc.plane == plane)
3764                 intel_disable_fbc(dev);
3765
3766         intel_crtc_dpms_overlay(intel_crtc, false);
3767         intel_crtc_update_cursor(crtc, false);
3768         intel_disable_planes(crtc);
3769         intel_disable_plane(dev_priv, plane, pipe);
3770
3771         intel_disable_pipe(dev_priv, pipe);
3772
3773         i9xx_pfit_disable(intel_crtc);
3774
3775         for_each_encoder_on_crtc(dev, crtc, encoder)
3776                 if (encoder->post_disable)
3777                         encoder->post_disable(encoder);
3778
3779         i9xx_disable_pll(dev_priv, pipe);
3780
3781         intel_crtc->active = false;
3782         intel_update_fbc(dev);
3783         intel_update_watermarks(dev);
3784 }
3785
3786 static void i9xx_crtc_off(struct drm_crtc *crtc)
3787 {
3788 }
3789
3790 static void intel_crtc_update_sarea(struct drm_crtc *crtc,
3791                                     bool enabled)
3792 {
3793         struct drm_device *dev = crtc->dev;
3794         struct drm_i915_master_private *master_priv;
3795         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3796         int pipe = intel_crtc->pipe;
3797
3798         if (!dev->primary->master)
3799                 return;
3800
3801         master_priv = dev->primary->master->driver_priv;
3802         if (!master_priv->sarea_priv)
3803                 return;
3804
3805         switch (pipe) {
3806         case 0:
3807                 master_priv->sarea_priv->pipeA_w = enabled ? crtc->mode.hdisplay : 0;
3808                 master_priv->sarea_priv->pipeA_h = enabled ? crtc->mode.vdisplay : 0;
3809                 break;
3810         case 1:
3811                 master_priv->sarea_priv->pipeB_w = enabled ? crtc->mode.hdisplay : 0;
3812                 master_priv->sarea_priv->pipeB_h = enabled ? crtc->mode.vdisplay : 0;
3813                 break;
3814         default:
3815                 DRM_ERROR("Can't update pipe %c in SAREA\n", pipe_name(pipe));
3816                 break;
3817         }
3818 }
3819
3820 /**
3821  * Sets the power management mode of the pipe and plane.
3822  */
3823 void intel_crtc_update_dpms(struct drm_crtc *crtc)
3824 {
3825         struct drm_device *dev = crtc->dev;
3826         struct drm_i915_private *dev_priv = dev->dev_private;
3827         struct intel_encoder *intel_encoder;
3828         bool enable = false;
3829
3830         for_each_encoder_on_crtc(dev, crtc, intel_encoder)
3831                 enable |= intel_encoder->connectors_active;
3832
3833         if (enable)
3834                 dev_priv->display.crtc_enable(crtc);
3835         else
3836                 dev_priv->display.crtc_disable(crtc);
3837
3838         intel_crtc_update_sarea(crtc, enable);
3839 }
3840
3841 static void intel_crtc_disable(struct drm_crtc *crtc)
3842 {
3843         struct drm_device *dev = crtc->dev;
3844         struct drm_connector *connector;
3845         struct drm_i915_private *dev_priv = dev->dev_private;
3846         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3847
3848         /* crtc should still be enabled when we disable it. */
3849         WARN_ON(!crtc->enabled);
3850
3851         dev_priv->display.crtc_disable(crtc);
3852         intel_crtc->eld_vld = false;
3853         intel_crtc_update_sarea(crtc, false);
3854         dev_priv->display.off(crtc);
3855
3856         assert_plane_disabled(dev->dev_private, to_intel_crtc(crtc)->plane);
3857         assert_pipe_disabled(dev->dev_private, to_intel_crtc(crtc)->pipe);
3858
3859         if (crtc->fb) {
3860                 mutex_lock(&dev->struct_mutex);
3861                 intel_unpin_fb_obj(to_intel_framebuffer(crtc->fb)->obj);
3862                 mutex_unlock(&dev->struct_mutex);
3863                 crtc->fb = NULL;
3864         }
3865
3866         /* Update computed state. */
3867         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
3868                 if (!connector->encoder || !connector->encoder->crtc)
3869                         continue;
3870
3871                 if (connector->encoder->crtc != crtc)
3872                         continue;
3873
3874                 connector->dpms = DRM_MODE_DPMS_OFF;
3875                 to_intel_encoder(connector->encoder)->connectors_active = false;
3876         }
3877 }
3878
3879 void intel_encoder_destroy(struct drm_encoder *encoder)
3880 {
3881         struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
3882
3883         drm_encoder_cleanup(encoder);
3884         kfree(intel_encoder);
3885 }
3886
3887 /* Simple dpms helper for encoders with just one connector, no cloning and only
3888  * one kind of off state. It clamps all !ON modes to fully OFF and changes the
3889  * state of the entire output pipe. */
3890 static void intel_encoder_dpms(struct intel_encoder *encoder, int mode)
3891 {
3892         if (mode == DRM_MODE_DPMS_ON) {
3893                 encoder->connectors_active = true;
3894
3895                 intel_crtc_update_dpms(encoder->base.crtc);
3896         } else {
3897                 encoder->connectors_active = false;
3898
3899                 intel_crtc_update_dpms(encoder->base.crtc);
3900         }
3901 }
3902
3903 /* Cross check the actual hw state with our own modeset state tracking (and it's
3904  * internal consistency). */
3905 static void intel_connector_check_state(struct intel_connector *connector)
3906 {
3907         if (connector->get_hw_state(connector)) {
3908                 struct intel_encoder *encoder = connector->encoder;
3909                 struct drm_crtc *crtc;
3910                 bool encoder_enabled;
3911                 enum pipe pipe;
3912
3913                 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
3914                               connector->base.base.id,
3915                               drm_get_connector_name(&connector->base));
3916
3917                 WARN(connector->base.dpms == DRM_MODE_DPMS_OFF,
3918                      "wrong connector dpms state\n");
3919                 WARN(connector->base.encoder != &encoder->base,
3920                      "active connector not linked to encoder\n");
3921                 WARN(!encoder->connectors_active,
3922                      "encoder->connectors_active not set\n");
3923
3924                 encoder_enabled = encoder->get_hw_state(encoder, &pipe);
3925                 WARN(!encoder_enabled, "encoder not enabled\n");
3926                 if (WARN_ON(!encoder->base.crtc))
3927                         return;
3928
3929                 crtc = encoder->base.crtc;
3930
3931                 WARN(!crtc->enabled, "crtc not enabled\n");
3932                 WARN(!to_intel_crtc(crtc)->active, "crtc not active\n");
3933                 WARN(pipe != to_intel_crtc(crtc)->pipe,
3934                      "encoder active on the wrong pipe\n");
3935         }
3936 }
3937
3938 /* Even simpler default implementation, if there's really no special case to
3939  * consider. */
3940 void intel_connector_dpms(struct drm_connector *connector, int mode)
3941 {
3942         struct intel_encoder *encoder = intel_attached_encoder(connector);
3943
3944         /* All the simple cases only support two dpms states. */
3945         if (mode != DRM_MODE_DPMS_ON)
3946                 mode = DRM_MODE_DPMS_OFF;
3947
3948         if (mode == connector->dpms)
3949                 return;
3950
3951         connector->dpms = mode;
3952
3953         /* Only need to change hw state when actually enabled */
3954         if (encoder->base.crtc)
3955                 intel_encoder_dpms(encoder, mode);
3956         else
3957                 WARN_ON(encoder->connectors_active != false);
3958
3959         intel_modeset_check_state(connector->dev);
3960 }
3961
3962 /* Simple connector->get_hw_state implementation for encoders that support only
3963  * one connector and no cloning and hence the encoder state determines the state
3964  * of the connector. */
3965 bool intel_connector_get_hw_state(struct intel_connector *connector)
3966 {
3967         enum pipe pipe = 0;
3968         struct intel_encoder *encoder = connector->encoder;
3969
3970         return encoder->get_hw_state(encoder, &pipe);
3971 }
3972
3973 static bool ironlake_check_fdi_lanes(struct drm_device *dev, enum pipe pipe,
3974                                      struct intel_crtc_config *pipe_config)
3975 {
3976         struct drm_i915_private *dev_priv = dev->dev_private;
3977         struct intel_crtc *pipe_B_crtc =
3978                 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[PIPE_B]);
3979
3980         DRM_DEBUG_KMS("checking fdi config on pipe %c, lanes %i\n",
3981                       pipe_name(pipe), pipe_config->fdi_lanes);
3982         if (pipe_config->fdi_lanes > 4) {
3983                 DRM_DEBUG_KMS("invalid fdi lane config on pipe %c: %i lanes\n",
3984                               pipe_name(pipe), pipe_config->fdi_lanes);
3985                 return false;
3986         }
3987
3988         if (IS_HASWELL(dev)) {
3989                 if (pipe_config->fdi_lanes > 2) {
3990                         DRM_DEBUG_KMS("only 2 lanes on haswell, required: %i lanes\n",
3991                                       pipe_config->fdi_lanes);
3992                         return false;
3993                 } else {
3994                         return true;
3995                 }
3996         }
3997
3998         if (INTEL_INFO(dev)->num_pipes == 2)
3999                 return true;
4000
4001         /* Ivybridge 3 pipe is really complicated */
4002         switch (pipe) {
4003         case PIPE_A:
4004                 return true;
4005         case PIPE_B:
4006                 if (dev_priv->pipe_to_crtc_mapping[PIPE_C]->enabled &&
4007                     pipe_config->fdi_lanes > 2) {
4008                         DRM_DEBUG_KMS("invalid shared fdi lane config on pipe %c: %i lanes\n",
4009                                       pipe_name(pipe), pipe_config->fdi_lanes);
4010                         return false;
4011                 }
4012                 return true;
4013         case PIPE_C:
4014                 if (!pipe_has_enabled_pch(pipe_B_crtc) ||
4015                     pipe_B_crtc->config.fdi_lanes <= 2) {
4016                         if (pipe_config->fdi_lanes > 2) {
4017                                 DRM_DEBUG_KMS("invalid shared fdi lane config on pipe %c: %i lanes\n",
4018                                               pipe_name(pipe), pipe_config->fdi_lanes);
4019                                 return false;
4020                         }
4021                 } else {
4022                         DRM_DEBUG_KMS("fdi link B uses too many lanes to enable link C\n");
4023                         return false;
4024                 }
4025                 return true;
4026         default:
4027                 BUG();
4028         }
4029 }
4030
4031 #define RETRY 1
4032 static int ironlake_fdi_compute_config(struct intel_crtc *intel_crtc,
4033                                        struct intel_crtc_config *pipe_config)
4034 {
4035         struct drm_device *dev = intel_crtc->base.dev;
4036         struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
4037         int lane, link_bw, fdi_dotclock;
4038         bool setup_ok, needs_recompute = false;
4039
4040 retry:
4041         /* FDI is a binary signal running at ~2.7GHz, encoding
4042          * each output octet as 10 bits. The actual frequency
4043          * is stored as a divider into a 100MHz clock, and the
4044          * mode pixel clock is stored in units of 1KHz.
4045          * Hence the bw of each lane in terms of the mode signal
4046          * is:
4047          */
4048         link_bw = intel_fdi_link_freq(dev) * MHz(100)/KHz(1)/10;
4049
4050         fdi_dotclock = adjusted_mode->clock;
4051         fdi_dotclock /= pipe_config->pixel_multiplier;
4052
4053         lane = ironlake_get_lanes_required(fdi_dotclock, link_bw,
4054                                            pipe_config->pipe_bpp);
4055
4056         pipe_config->fdi_lanes = lane;
4057
4058         intel_link_compute_m_n(pipe_config->pipe_bpp, lane, fdi_dotclock,
4059                                link_bw, &pipe_config->fdi_m_n);
4060
4061         setup_ok = ironlake_check_fdi_lanes(intel_crtc->base.dev,
4062                                             intel_crtc->pipe, pipe_config);
4063         if (!setup_ok && pipe_config->pipe_bpp > 6*3) {
4064                 pipe_config->pipe_bpp -= 2*3;
4065                 DRM_DEBUG_KMS("fdi link bw constraint, reducing pipe bpp to %i\n",
4066                               pipe_config->pipe_bpp);
4067                 needs_recompute = true;
4068                 pipe_config->bw_constrained = true;
4069
4070                 goto retry;
4071         }
4072
4073         if (needs_recompute)
4074                 return RETRY;
4075
4076         return setup_ok ? 0 : -EINVAL;
4077 }
4078
4079 static void hsw_compute_ips_config(struct intel_crtc *crtc,
4080                                    struct intel_crtc_config *pipe_config)
4081 {
4082         pipe_config->ips_enabled = i915_enable_ips &&
4083                                    hsw_crtc_supports_ips(crtc) &&
4084                                    pipe_config->pipe_bpp <= 24;
4085 }
4086
4087 static int intel_crtc_compute_config(struct intel_crtc *crtc,
4088                                      struct intel_crtc_config *pipe_config)
4089 {
4090         struct drm_device *dev = crtc->base.dev;
4091         struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
4092
4093         if (HAS_PCH_SPLIT(dev)) {
4094                 /* FDI link clock is fixed at 2.7G */
4095                 if (pipe_config->requested_mode.clock * 3
4096                     > IRONLAKE_FDI_FREQ * 4)
4097                         return -EINVAL;
4098         }
4099
4100         /* Cantiga+ cannot handle modes with a hsync front porch of 0.
4101          * WaPruneModeWithIncorrectHsyncOffset:ctg,elk,ilk,snb,ivb,vlv,hsw.
4102          */
4103         if ((INTEL_INFO(dev)->gen > 4 || IS_G4X(dev)) &&
4104                 adjusted_mode->hsync_start == adjusted_mode->hdisplay)
4105                 return -EINVAL;
4106
4107         if ((IS_G4X(dev) || IS_VALLEYVIEW(dev)) && pipe_config->pipe_bpp > 10*3) {
4108                 pipe_config->pipe_bpp = 10*3; /* 12bpc is gen5+ */
4109         } else if (INTEL_INFO(dev)->gen <= 4 && pipe_config->pipe_bpp > 8*3) {
4110                 /* only a 8bpc pipe, with 6bpc dither through the panel fitter
4111                  * for lvds. */
4112                 pipe_config->pipe_bpp = 8*3;
4113         }
4114
4115         if (HAS_IPS(dev))
4116                 hsw_compute_ips_config(crtc, pipe_config);
4117
4118         /* XXX: PCH clock sharing is done in ->mode_set, so make sure the old
4119          * clock survives for now. */
4120         if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
4121                 pipe_config->shared_dpll = crtc->config.shared_dpll;
4122
4123         if (pipe_config->has_pch_encoder)
4124                 return ironlake_fdi_compute_config(crtc, pipe_config);
4125
4126         return 0;
4127 }
4128
4129 static int valleyview_get_display_clock_speed(struct drm_device *dev)
4130 {
4131         return 400000; /* FIXME */
4132 }
4133
4134 static int i945_get_display_clock_speed(struct drm_device *dev)
4135 {
4136         return 400000;
4137 }
4138
4139 static int i915_get_display_clock_speed(struct drm_device *dev)
4140 {
4141         return 333000;
4142 }
4143
4144 static int i9xx_misc_get_display_clock_speed(struct drm_device *dev)
4145 {
4146         return 200000;
4147 }
4148
4149 static int pnv_get_display_clock_speed(struct drm_device *dev)
4150 {
4151         u16 gcfgc = 0;
4152
4153         pci_read_config_word(dev->pdev, GCFGC, &gcfgc);
4154
4155         switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
4156         case GC_DISPLAY_CLOCK_267_MHZ_PNV:
4157                 return 267000;
4158         case GC_DISPLAY_CLOCK_333_MHZ_PNV:
4159                 return 333000;
4160         case GC_DISPLAY_CLOCK_444_MHZ_PNV:
4161                 return 444000;
4162         case GC_DISPLAY_CLOCK_200_MHZ_PNV:
4163                 return 200000;
4164         default:
4165                 DRM_ERROR("Unknown pnv display core clock 0x%04x\n", gcfgc);
4166         case GC_DISPLAY_CLOCK_133_MHZ_PNV:
4167                 return 133000;
4168         case GC_DISPLAY_CLOCK_167_MHZ_PNV:
4169                 return 167000;
4170         }
4171 }
4172
4173 static int i915gm_get_display_clock_speed(struct drm_device *dev)
4174 {
4175         u16 gcfgc = 0;
4176
4177         pci_read_config_word(dev->pdev, GCFGC, &gcfgc);
4178
4179         if (gcfgc & GC_LOW_FREQUENCY_ENABLE)
4180                 return 133000;
4181         else {
4182                 switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
4183                 case GC_DISPLAY_CLOCK_333_MHZ:
4184                         return 333000;
4185                 default:
4186                 case GC_DISPLAY_CLOCK_190_200_MHZ:
4187                         return 190000;
4188                 }
4189         }
4190 }
4191
4192 static int i865_get_display_clock_speed(struct drm_device *dev)
4193 {
4194         return 266000;
4195 }
4196
4197 static int i855_get_display_clock_speed(struct drm_device *dev)
4198 {
4199         u16 hpllcc = 0;
4200         /* Assume that the hardware is in the high speed state.  This
4201          * should be the default.
4202          */
4203         switch (hpllcc & GC_CLOCK_CONTROL_MASK) {
4204         case GC_CLOCK_133_200:
4205         case GC_CLOCK_100_200:
4206                 return 200000;
4207         case GC_CLOCK_166_250:
4208                 return 250000;
4209         case GC_CLOCK_100_133:
4210                 return 133000;
4211         }
4212
4213         /* Shouldn't happen */
4214         return 0;
4215 }
4216
4217 static int i830_get_display_clock_speed(struct drm_device *dev)
4218 {
4219         return 133000;
4220 }
4221
4222 static void
4223 intel_reduce_m_n_ratio(uint32_t *num, uint32_t *den)
4224 {
4225         while (*num > DATA_LINK_M_N_MASK ||
4226                *den > DATA_LINK_M_N_MASK) {
4227                 *num >>= 1;
4228                 *den >>= 1;
4229         }
4230 }
4231
4232 static void compute_m_n(unsigned int m, unsigned int n,
4233                         uint32_t *ret_m, uint32_t *ret_n)
4234 {
4235         *ret_n = min_t(unsigned int, roundup_pow_of_two(n), DATA_LINK_N_MAX);
4236         *ret_m = div_u64((uint64_t) m * *ret_n, n);
4237         intel_reduce_m_n_ratio(ret_m, ret_n);
4238 }
4239
4240 void
4241 intel_link_compute_m_n(int bits_per_pixel, int nlanes,
4242                        int pixel_clock, int link_clock,
4243                        struct intel_link_m_n *m_n)
4244 {
4245         m_n->tu = 64;
4246
4247         compute_m_n(bits_per_pixel * pixel_clock,
4248                     link_clock * nlanes * 8,
4249                     &m_n->gmch_m, &m_n->gmch_n);
4250
4251         compute_m_n(pixel_clock, link_clock,
4252                     &m_n->link_m, &m_n->link_n);
4253 }
4254
4255 static inline bool intel_panel_use_ssc(struct drm_i915_private *dev_priv)
4256 {
4257         if (i915_panel_use_ssc >= 0)
4258                 return i915_panel_use_ssc != 0;
4259         return dev_priv->vbt.lvds_use_ssc
4260                 && !(dev_priv->quirks & QUIRK_LVDS_SSC_DISABLE);
4261 }
4262
4263 static int vlv_get_refclk(struct drm_crtc *crtc)
4264 {
4265         struct drm_device *dev = crtc->dev;
4266         struct drm_i915_private *dev_priv = dev->dev_private;
4267         int refclk = 27000; /* for DP & HDMI */
4268
4269         return 100000; /* only one validated so far */
4270
4271         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG)) {
4272                 refclk = 96000;
4273         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
4274                 if (intel_panel_use_ssc(dev_priv))
4275                         refclk = 100000;
4276                 else
4277                         refclk = 96000;
4278         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP)) {
4279                 refclk = 100000;
4280         }
4281
4282         return refclk;
4283 }
4284
4285 static int i9xx_get_refclk(struct drm_crtc *crtc, int num_connectors)
4286 {
4287         struct drm_device *dev = crtc->dev;
4288         struct drm_i915_private *dev_priv = dev->dev_private;
4289         int refclk;
4290
4291         if (IS_VALLEYVIEW(dev)) {
4292                 refclk = vlv_get_refclk(crtc);
4293         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
4294             intel_panel_use_ssc(dev_priv) && num_connectors < 2) {
4295                 refclk = dev_priv->vbt.lvds_ssc_freq * 1000;
4296                 DRM_DEBUG_KMS("using SSC reference clock of %d MHz\n",
4297                               refclk / 1000);
4298         } else if (!IS_GEN2(dev)) {
4299                 refclk = 96000;
4300         } else {
4301                 refclk = 48000;
4302         }
4303
4304         return refclk;
4305 }
4306
4307 static uint32_t pnv_dpll_compute_fp(struct dpll *dpll)
4308 {
4309         return (1 << dpll->n) << 16 | dpll->m2;
4310 }
4311
4312 static uint32_t i9xx_dpll_compute_fp(struct dpll *dpll)
4313 {
4314         return dpll->n << 16 | dpll->m1 << 8 | dpll->m2;
4315 }
4316
4317 static void i9xx_update_pll_dividers(struct intel_crtc *crtc,
4318                                      intel_clock_t *reduced_clock)
4319 {
4320         struct drm_device *dev = crtc->base.dev;
4321         struct drm_i915_private *dev_priv = dev->dev_private;
4322         int pipe = crtc->pipe;
4323         u32 fp, fp2 = 0;
4324
4325         if (IS_PINEVIEW(dev)) {
4326                 fp = pnv_dpll_compute_fp(&crtc->config.dpll);
4327                 if (reduced_clock)
4328                         fp2 = pnv_dpll_compute_fp(reduced_clock);
4329         } else {
4330                 fp = i9xx_dpll_compute_fp(&crtc->config.dpll);
4331                 if (reduced_clock)
4332                         fp2 = i9xx_dpll_compute_fp(reduced_clock);
4333         }
4334
4335         I915_WRITE(FP0(pipe), fp);
4336         crtc->config.dpll_hw_state.fp0 = fp;
4337
4338         crtc->lowfreq_avail = false;
4339         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS) &&
4340             reduced_clock && i915_powersave) {
4341                 I915_WRITE(FP1(pipe), fp2);
4342                 crtc->config.dpll_hw_state.fp1 = fp2;
4343                 crtc->lowfreq_avail = true;
4344         } else {
4345                 I915_WRITE(FP1(pipe), fp);
4346                 crtc->config.dpll_hw_state.fp1 = fp;
4347         }
4348 }
4349
4350 static void vlv_pllb_recal_opamp(struct drm_i915_private *dev_priv)
4351 {
4352         u32 reg_val;
4353
4354         /*
4355          * PLLB opamp always calibrates to max value of 0x3f, force enable it
4356          * and set it to a reasonable value instead.
4357          */
4358         reg_val = vlv_dpio_read(dev_priv, DPIO_IREF(1));
4359         reg_val &= 0xffffff00;
4360         reg_val |= 0x00000030;
4361         vlv_dpio_write(dev_priv, DPIO_IREF(1), reg_val);
4362
4363         reg_val = vlv_dpio_read(dev_priv, DPIO_CALIBRATION);
4364         reg_val &= 0x8cffffff;
4365         reg_val = 0x8c000000;
4366         vlv_dpio_write(dev_priv, DPIO_CALIBRATION, reg_val);
4367
4368         reg_val = vlv_dpio_read(dev_priv, DPIO_IREF(1));
4369         reg_val &= 0xffffff00;
4370         vlv_dpio_write(dev_priv, DPIO_IREF(1), reg_val);
4371
4372         reg_val = vlv_dpio_read(dev_priv, DPIO_CALIBRATION);
4373         reg_val &= 0x00ffffff;
4374         reg_val |= 0xb0000000;
4375         vlv_dpio_write(dev_priv, DPIO_CALIBRATION, reg_val);
4376 }
4377
4378 static void intel_pch_transcoder_set_m_n(struct intel_crtc *crtc,
4379                                          struct intel_link_m_n *m_n)
4380 {
4381         struct drm_device *dev = crtc->base.dev;
4382         struct drm_i915_private *dev_priv = dev->dev_private;
4383         int pipe = crtc->pipe;
4384
4385         I915_WRITE(PCH_TRANS_DATA_M1(pipe), TU_SIZE(m_n->tu) | m_n->gmch_m);
4386         I915_WRITE(PCH_TRANS_DATA_N1(pipe), m_n->gmch_n);
4387         I915_WRITE(PCH_TRANS_LINK_M1(pipe), m_n->link_m);
4388         I915_WRITE(PCH_TRANS_LINK_N1(pipe), m_n->link_n);
4389 }
4390
4391 static void intel_cpu_transcoder_set_m_n(struct intel_crtc *crtc,
4392                                          struct intel_link_m_n *m_n)
4393 {
4394         struct drm_device *dev = crtc->base.dev;
4395         struct drm_i915_private *dev_priv = dev->dev_private;
4396         int pipe = crtc->pipe;
4397         enum transcoder transcoder = crtc->config.cpu_transcoder;
4398
4399         if (INTEL_INFO(dev)->gen >= 5) {
4400                 I915_WRITE(PIPE_DATA_M1(transcoder), TU_SIZE(m_n->tu) | m_n->gmch_m);
4401                 I915_WRITE(PIPE_DATA_N1(transcoder), m_n->gmch_n);
4402                 I915_WRITE(PIPE_LINK_M1(transcoder), m_n->link_m);
4403                 I915_WRITE(PIPE_LINK_N1(transcoder), m_n->link_n);
4404         } else {
4405                 I915_WRITE(PIPE_DATA_M_G4X(pipe), TU_SIZE(m_n->tu) | m_n->gmch_m);
4406                 I915_WRITE(PIPE_DATA_N_G4X(pipe), m_n->gmch_n);
4407                 I915_WRITE(PIPE_LINK_M_G4X(pipe), m_n->link_m);
4408                 I915_WRITE(PIPE_LINK_N_G4X(pipe), m_n->link_n);
4409         }
4410 }
4411
4412 static void intel_dp_set_m_n(struct intel_crtc *crtc)
4413 {
4414         if (crtc->config.has_pch_encoder)
4415                 intel_pch_transcoder_set_m_n(crtc, &crtc->config.dp_m_n);
4416         else
4417                 intel_cpu_transcoder_set_m_n(crtc, &crtc->config.dp_m_n);
4418 }
4419
4420 static void vlv_update_pll(struct intel_crtc *crtc)
4421 {
4422         struct drm_device *dev = crtc->base.dev;
4423         struct drm_i915_private *dev_priv = dev->dev_private;
4424         int pipe = crtc->pipe;
4425         u32 dpll, mdiv;
4426         u32 bestn, bestm1, bestm2, bestp1, bestp2;
4427         u32 coreclk, reg_val, dpll_md;
4428
4429         mutex_lock(&dev_priv->dpio_lock);
4430
4431         bestn = crtc->config.dpll.n;
4432         bestm1 = crtc->config.dpll.m1;
4433         bestm2 = crtc->config.dpll.m2;
4434         bestp1 = crtc->config.dpll.p1;
4435         bestp2 = crtc->config.dpll.p2;
4436
4437         /* See eDP HDMI DPIO driver vbios notes doc */
4438
4439         /* PLL B needs special handling */
4440         if (pipe)
4441                 vlv_pllb_recal_opamp(dev_priv);
4442
4443         /* Set up Tx target for periodic Rcomp update */
4444         vlv_dpio_write(dev_priv, DPIO_IREF_BCAST, 0x0100000f);
4445
4446         /* Disable target IRef on PLL */
4447         reg_val = vlv_dpio_read(dev_priv, DPIO_IREF_CTL(pipe));
4448         reg_val &= 0x00ffffff;
4449         vlv_dpio_write(dev_priv, DPIO_IREF_CTL(pipe), reg_val);
4450
4451         /* Disable fast lock */
4452         vlv_dpio_write(dev_priv, DPIO_FASTCLK_DISABLE, 0x610);
4453
4454         /* Set idtafcrecal before PLL is enabled */
4455         mdiv = ((bestm1 << DPIO_M1DIV_SHIFT) | (bestm2 & DPIO_M2DIV_MASK));
4456         mdiv |= ((bestp1 << DPIO_P1_SHIFT) | (bestp2 << DPIO_P2_SHIFT));
4457         mdiv |= ((bestn << DPIO_N_SHIFT));
4458         mdiv |= (1 << DPIO_K_SHIFT);
4459
4460         /*
4461          * Post divider depends on pixel clock rate, DAC vs digital (and LVDS,
4462          * but we don't support that).
4463          * Note: don't use the DAC post divider as it seems unstable.
4464          */
4465         mdiv |= (DPIO_POST_DIV_HDMIDP << DPIO_POST_DIV_SHIFT);
4466         vlv_dpio_write(dev_priv, DPIO_DIV(pipe), mdiv);
4467
4468         mdiv |= DPIO_ENABLE_CALIBRATION;
4469         vlv_dpio_write(dev_priv, DPIO_DIV(pipe), mdiv);
4470
4471         /* Set HBR and RBR LPF coefficients */
4472         if (crtc->config.port_clock == 162000 ||
4473             intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_ANALOG) ||
4474             intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_HDMI))
4475                 vlv_dpio_write(dev_priv, DPIO_LPF_COEFF(pipe),
4476                                  0x009f0003);
4477         else
4478                 vlv_dpio_write(dev_priv, DPIO_LPF_COEFF(pipe),
4479                                  0x00d0000f);
4480
4481         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_EDP) ||
4482             intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_DISPLAYPORT)) {
4483                 /* Use SSC source */
4484                 if (!pipe)
4485                         vlv_dpio_write(dev_priv, DPIO_REFSFR(pipe),
4486                                          0x0df40000);
4487                 else
4488                         vlv_dpio_write(dev_priv, DPIO_REFSFR(pipe),
4489                                          0x0df70000);
4490         } else { /* HDMI or VGA */
4491                 /* Use bend source */
4492                 if (!pipe)
4493                         vlv_dpio_write(dev_priv, DPIO_REFSFR(pipe),
4494                                          0x0df70000);
4495                 else
4496                         vlv_dpio_write(dev_priv, DPIO_REFSFR(pipe),
4497                                          0x0df40000);
4498         }
4499
4500         coreclk = vlv_dpio_read(dev_priv, DPIO_CORE_CLK(pipe));
4501         coreclk = (coreclk & 0x0000ff00) | 0x01c00000;
4502         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_DISPLAYPORT) ||
4503             intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_EDP))
4504                 coreclk |= 0x01000000;
4505         vlv_dpio_write(dev_priv, DPIO_CORE_CLK(pipe), coreclk);
4506
4507         vlv_dpio_write(dev_priv, DPIO_PLL_CML(pipe), 0x87871000);
4508
4509         /* Enable DPIO clock input */
4510         dpll = DPLL_EXT_BUFFER_ENABLE_VLV | DPLL_REFA_CLK_ENABLE_VLV |
4511                 DPLL_VGA_MODE_DIS | DPLL_INTEGRATED_CLOCK_VLV;
4512         if (pipe)
4513                 dpll |= DPLL_INTEGRATED_CRI_CLK_VLV;
4514
4515         dpll |= DPLL_VCO_ENABLE;
4516         crtc->config.dpll_hw_state.dpll = dpll;
4517
4518         dpll_md = (crtc->config.pixel_multiplier - 1)
4519                 << DPLL_MD_UDI_MULTIPLIER_SHIFT;
4520         crtc->config.dpll_hw_state.dpll_md = dpll_md;
4521
4522         if (crtc->config.has_dp_encoder)
4523                 intel_dp_set_m_n(crtc);
4524
4525         mutex_unlock(&dev_priv->dpio_lock);
4526 }
4527
4528 static void i9xx_update_pll(struct intel_crtc *crtc,
4529                             intel_clock_t *reduced_clock,
4530                             int num_connectors)
4531 {
4532         struct drm_device *dev = crtc->base.dev;
4533         struct drm_i915_private *dev_priv = dev->dev_private;
4534         u32 dpll;
4535         bool is_sdvo;
4536         struct dpll *clock = &crtc->config.dpll;
4537
4538         i9xx_update_pll_dividers(crtc, reduced_clock);
4539
4540         is_sdvo = intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_SDVO) ||
4541                 intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_HDMI);
4542
4543         dpll = DPLL_VGA_MODE_DIS;
4544
4545         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS))
4546                 dpll |= DPLLB_MODE_LVDS;
4547         else
4548                 dpll |= DPLLB_MODE_DAC_SERIAL;
4549
4550         if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) {
4551                 dpll |= (crtc->config.pixel_multiplier - 1)
4552                         << SDVO_MULTIPLIER_SHIFT_HIRES;
4553         }
4554
4555         if (is_sdvo)
4556                 dpll |= DPLL_SDVO_HIGH_SPEED;
4557
4558         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_DISPLAYPORT))
4559                 dpll |= DPLL_SDVO_HIGH_SPEED;
4560
4561         /* compute bitmask from p1 value */
4562         if (IS_PINEVIEW(dev))
4563                 dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW;
4564         else {
4565                 dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4566                 if (IS_G4X(dev) && reduced_clock)
4567                         dpll |= (1 << (reduced_clock->p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
4568         }
4569         switch (clock->p2) {
4570         case 5:
4571                 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
4572                 break;
4573         case 7:
4574                 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
4575                 break;
4576         case 10:
4577                 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
4578                 break;
4579         case 14:
4580                 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
4581                 break;
4582         }
4583         if (INTEL_INFO(dev)->gen >= 4)
4584                 dpll |= (6 << PLL_LOAD_PULSE_PHASE_SHIFT);
4585
4586         if (crtc->config.sdvo_tv_clock)
4587                 dpll |= PLL_REF_INPUT_TVCLKINBC;
4588         else if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS) &&
4589                  intel_panel_use_ssc(dev_priv) && num_connectors < 2)
4590                 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
4591         else
4592                 dpll |= PLL_REF_INPUT_DREFCLK;
4593
4594         dpll |= DPLL_VCO_ENABLE;
4595         crtc->config.dpll_hw_state.dpll = dpll;
4596
4597         if (INTEL_INFO(dev)->gen >= 4) {
4598                 u32 dpll_md = (crtc->config.pixel_multiplier - 1)
4599                         << DPLL_MD_UDI_MULTIPLIER_SHIFT;
4600                 crtc->config.dpll_hw_state.dpll_md = dpll_md;
4601         }
4602
4603         if (crtc->config.has_dp_encoder)
4604                 intel_dp_set_m_n(crtc);
4605 }
4606
4607 static void i8xx_update_pll(struct intel_crtc *crtc,
4608                             intel_clock_t *reduced_clock,
4609                             int num_connectors)
4610 {
4611         struct drm_device *dev = crtc->base.dev;
4612         struct drm_i915_private *dev_priv = dev->dev_private;
4613         u32 dpll;
4614         struct dpll *clock = &crtc->config.dpll;
4615
4616         i9xx_update_pll_dividers(crtc, reduced_clock);
4617
4618         dpll = DPLL_VGA_MODE_DIS;
4619
4620         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS)) {
4621                 dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4622         } else {
4623                 if (clock->p1 == 2)
4624                         dpll |= PLL_P1_DIVIDE_BY_TWO;
4625                 else
4626                         dpll |= (clock->p1 - 2) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4627                 if (clock->p2 == 4)
4628                         dpll |= PLL_P2_DIVIDE_BY_4;
4629         }
4630
4631         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_DVO))
4632                 dpll |= DPLL_DVO_2X_MODE;
4633
4634         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS) &&
4635                  intel_panel_use_ssc(dev_priv) && num_connectors < 2)
4636                 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
4637         else
4638                 dpll |= PLL_REF_INPUT_DREFCLK;
4639
4640         dpll |= DPLL_VCO_ENABLE;
4641         crtc->config.dpll_hw_state.dpll = dpll;
4642 }
4643
4644 static void intel_set_pipe_timings(struct intel_crtc *intel_crtc)
4645 {
4646         struct drm_device *dev = intel_crtc->base.dev;
4647         struct drm_i915_private *dev_priv = dev->dev_private;
4648         enum pipe pipe = intel_crtc->pipe;
4649         enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
4650         struct drm_display_mode *adjusted_mode =
4651                 &intel_crtc->config.adjusted_mode;
4652         struct drm_display_mode *mode = &intel_crtc->config.requested_mode;
4653         uint32_t vsyncshift, crtc_vtotal, crtc_vblank_end;
4654
4655         /* We need to be careful not to changed the adjusted mode, for otherwise
4656          * the hw state checker will get angry at the mismatch. */
4657         crtc_vtotal = adjusted_mode->crtc_vtotal;
4658         crtc_vblank_end = adjusted_mode->crtc_vblank_end;
4659
4660         if (!IS_GEN2(dev) && adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
4661                 /* the chip adds 2 halflines automatically */
4662                 crtc_vtotal -= 1;
4663                 crtc_vblank_end -= 1;
4664                 vsyncshift = adjusted_mode->crtc_hsync_start
4665                              - adjusted_mode->crtc_htotal / 2;
4666         } else {
4667                 vsyncshift = 0;
4668         }
4669
4670         if (INTEL_INFO(dev)->gen > 3)
4671                 I915_WRITE(VSYNCSHIFT(cpu_transcoder), vsyncshift);
4672
4673         I915_WRITE(HTOTAL(cpu_transcoder),
4674                    (adjusted_mode->crtc_hdisplay - 1) |
4675                    ((adjusted_mode->crtc_htotal - 1) << 16));
4676         I915_WRITE(HBLANK(cpu_transcoder),
4677                    (adjusted_mode->crtc_hblank_start - 1) |
4678                    ((adjusted_mode->crtc_hblank_end - 1) << 16));
4679         I915_WRITE(HSYNC(cpu_transcoder),
4680                    (adjusted_mode->crtc_hsync_start - 1) |
4681                    ((adjusted_mode->crtc_hsync_end - 1) << 16));
4682
4683         I915_WRITE(VTOTAL(cpu_transcoder),
4684                    (adjusted_mode->crtc_vdisplay - 1) |
4685                    ((crtc_vtotal - 1) << 16));
4686         I915_WRITE(VBLANK(cpu_transcoder),
4687                    (adjusted_mode->crtc_vblank_start - 1) |
4688                    ((crtc_vblank_end - 1) << 16));
4689         I915_WRITE(VSYNC(cpu_transcoder),
4690                    (adjusted_mode->crtc_vsync_start - 1) |
4691                    ((adjusted_mode->crtc_vsync_end - 1) << 16));
4692
4693         /* Workaround: when the EDP input selection is B, the VTOTAL_B must be
4694          * programmed with the VTOTAL_EDP value. Same for VTOTAL_C. This is
4695          * documented on the DDI_FUNC_CTL register description, EDP Input Select
4696          * bits. */
4697         if (IS_HASWELL(dev) && cpu_transcoder == TRANSCODER_EDP &&
4698             (pipe == PIPE_B || pipe == PIPE_C))
4699                 I915_WRITE(VTOTAL(pipe), I915_READ(VTOTAL(cpu_transcoder)));
4700
4701         /* pipesrc controls the size that is scaled from, which should
4702          * always be the user's requested size.
4703          */
4704         I915_WRITE(PIPESRC(pipe),
4705                    ((mode->hdisplay - 1) << 16) | (mode->vdisplay - 1));
4706 }
4707
4708 static void intel_get_pipe_timings(struct intel_crtc *crtc,
4709                                    struct intel_crtc_config *pipe_config)
4710 {
4711         struct drm_device *dev = crtc->base.dev;
4712         struct drm_i915_private *dev_priv = dev->dev_private;
4713         enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
4714         uint32_t tmp;
4715
4716         tmp = I915_READ(HTOTAL(cpu_transcoder));
4717         pipe_config->adjusted_mode.crtc_hdisplay = (tmp & 0xffff) + 1;
4718         pipe_config->adjusted_mode.crtc_htotal = ((tmp >> 16) & 0xffff) + 1;
4719         tmp = I915_READ(HBLANK(cpu_transcoder));
4720         pipe_config->adjusted_mode.crtc_hblank_start = (tmp & 0xffff) + 1;
4721         pipe_config->adjusted_mode.crtc_hblank_end = ((tmp >> 16) & 0xffff) + 1;
4722         tmp = I915_READ(HSYNC(cpu_transcoder));
4723         pipe_config->adjusted_mode.crtc_hsync_start = (tmp & 0xffff) + 1;
4724         pipe_config->adjusted_mode.crtc_hsync_end = ((tmp >> 16) & 0xffff) + 1;
4725
4726         tmp = I915_READ(VTOTAL(cpu_transcoder));
4727         pipe_config->adjusted_mode.crtc_vdisplay = (tmp & 0xffff) + 1;
4728         pipe_config->adjusted_mode.crtc_vtotal = ((tmp >> 16) & 0xffff) + 1;
4729         tmp = I915_READ(VBLANK(cpu_transcoder));
4730         pipe_config->adjusted_mode.crtc_vblank_start = (tmp & 0xffff) + 1;
4731         pipe_config->adjusted_mode.crtc_vblank_end = ((tmp >> 16) & 0xffff) + 1;
4732         tmp = I915_READ(VSYNC(cpu_transcoder));
4733         pipe_config->adjusted_mode.crtc_vsync_start = (tmp & 0xffff) + 1;
4734         pipe_config->adjusted_mode.crtc_vsync_end = ((tmp >> 16) & 0xffff) + 1;
4735
4736         if (I915_READ(PIPECONF(cpu_transcoder)) & PIPECONF_INTERLACE_MASK) {
4737                 pipe_config->adjusted_mode.flags |= DRM_MODE_FLAG_INTERLACE;
4738                 pipe_config->adjusted_mode.crtc_vtotal += 1;
4739                 pipe_config->adjusted_mode.crtc_vblank_end += 1;
4740         }
4741
4742         tmp = I915_READ(PIPESRC(crtc->pipe));
4743         pipe_config->requested_mode.vdisplay = (tmp & 0xffff) + 1;
4744         pipe_config->requested_mode.hdisplay = ((tmp >> 16) & 0xffff) + 1;
4745 }
4746
4747 static void intel_crtc_mode_from_pipe_config(struct intel_crtc *intel_crtc,
4748                                              struct intel_crtc_config *pipe_config)
4749 {
4750         struct drm_crtc *crtc = &intel_crtc->base;
4751
4752         crtc->mode.hdisplay = pipe_config->adjusted_mode.crtc_hdisplay;
4753         crtc->mode.htotal = pipe_config->adjusted_mode.crtc_htotal;
4754         crtc->mode.hsync_start = pipe_config->adjusted_mode.crtc_hsync_start;
4755         crtc->mode.hsync_end = pipe_config->adjusted_mode.crtc_hsync_end;
4756
4757         crtc->mode.vdisplay = pipe_config->adjusted_mode.crtc_vdisplay;
4758         crtc->mode.vtotal = pipe_config->adjusted_mode.crtc_vtotal;
4759         crtc->mode.vsync_start = pipe_config->adjusted_mode.crtc_vsync_start;
4760         crtc->mode.vsync_end = pipe_config->adjusted_mode.crtc_vsync_end;
4761
4762         crtc->mode.flags = pipe_config->adjusted_mode.flags;
4763
4764         crtc->mode.clock = pipe_config->adjusted_mode.clock;
4765         crtc->mode.flags |= pipe_config->adjusted_mode.flags;
4766 }
4767
4768 static void i9xx_set_pipeconf(struct intel_crtc *intel_crtc)
4769 {
4770         struct drm_device *dev = intel_crtc->base.dev;
4771         struct drm_i915_private *dev_priv = dev->dev_private;
4772         uint32_t pipeconf;
4773
4774         pipeconf = 0;
4775
4776         if (intel_crtc->pipe == 0 && INTEL_INFO(dev)->gen < 4) {
4777                 /* Enable pixel doubling when the dot clock is > 90% of the (display)
4778                  * core speed.
4779                  *
4780                  * XXX: No double-wide on 915GM pipe B. Is that the only reason for the
4781                  * pipe == 0 check?
4782                  */
4783                 if (intel_crtc->config.requested_mode.clock >
4784                     dev_priv->display.get_display_clock_speed(dev) * 9 / 10)
4785                         pipeconf |= PIPECONF_DOUBLE_WIDE;
4786         }
4787
4788         /* only g4x and later have fancy bpc/dither controls */
4789         if (IS_G4X(dev) || IS_VALLEYVIEW(dev)) {
4790                 /* Bspec claims that we can't use dithering for 30bpp pipes. */
4791                 if (intel_crtc->config.dither && intel_crtc->config.pipe_bpp != 30)
4792                         pipeconf |= PIPECONF_DITHER_EN |
4793                                     PIPECONF_DITHER_TYPE_SP;
4794
4795                 switch (intel_crtc->config.pipe_bpp) {
4796                 case 18:
4797                         pipeconf |= PIPECONF_6BPC;
4798                         break;
4799                 case 24:
4800                         pipeconf |= PIPECONF_8BPC;
4801                         break;
4802                 case 30:
4803                         pipeconf |= PIPECONF_10BPC;
4804                         break;
4805                 default:
4806                         /* Case prevented by intel_choose_pipe_bpp_dither. */
4807                         BUG();
4808                 }
4809         }
4810
4811         if (HAS_PIPE_CXSR(dev)) {
4812                 if (intel_crtc->lowfreq_avail) {
4813                         DRM_DEBUG_KMS("enabling CxSR downclocking\n");
4814                         pipeconf |= PIPECONF_CXSR_DOWNCLOCK;
4815                 } else {
4816                         DRM_DEBUG_KMS("disabling CxSR downclocking\n");
4817                 }
4818         }
4819
4820         if (!IS_GEN2(dev) &&
4821             intel_crtc->config.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE)
4822                 pipeconf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
4823         else
4824                 pipeconf |= PIPECONF_PROGRESSIVE;
4825
4826         if (IS_VALLEYVIEW(dev) && intel_crtc->config.limited_color_range)
4827                 pipeconf |= PIPECONF_COLOR_RANGE_SELECT;
4828
4829         I915_WRITE(PIPECONF(intel_crtc->pipe), pipeconf);
4830         POSTING_READ(PIPECONF(intel_crtc->pipe));
4831 }
4832
4833 static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
4834                               int x, int y,
4835                               struct drm_framebuffer *fb)
4836 {
4837         struct drm_device *dev = crtc->dev;
4838         struct drm_i915_private *dev_priv = dev->dev_private;
4839         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4840         struct drm_display_mode *mode = &intel_crtc->config.requested_mode;
4841         int pipe = intel_crtc->pipe;
4842         int plane = intel_crtc->plane;
4843         int refclk, num_connectors = 0;
4844         intel_clock_t clock, reduced_clock;
4845         u32 dspcntr;
4846         bool ok, has_reduced_clock = false;
4847         bool is_lvds = false;
4848         struct intel_encoder *encoder;
4849         const intel_limit_t *limit;
4850         int ret;
4851
4852         for_each_encoder_on_crtc(dev, crtc, encoder) {
4853                 switch (encoder->type) {
4854                 case INTEL_OUTPUT_LVDS:
4855                         is_lvds = true;
4856                         break;
4857                 }
4858
4859                 num_connectors++;
4860         }
4861
4862         refclk = i9xx_get_refclk(crtc, num_connectors);
4863
4864         /*
4865          * Returns a set of divisors for the desired target clock with the given
4866          * refclk, or FALSE.  The returned values represent the clock equation:
4867          * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
4868          */
4869         limit = intel_limit(crtc, refclk);
4870         ok = dev_priv->display.find_dpll(limit, crtc,
4871                                          intel_crtc->config.port_clock,
4872                                          refclk, NULL, &clock);
4873         if (!ok && !intel_crtc->config.clock_set) {
4874                 DRM_ERROR("Couldn't find PLL settings for mode!\n");
4875                 return -EINVAL;
4876         }
4877
4878         /* Ensure that the cursor is valid for the new mode before changing... */
4879         intel_crtc_update_cursor(crtc, true);
4880
4881         if (is_lvds && dev_priv->lvds_downclock_avail) {
4882                 /*
4883                  * Ensure we match the reduced clock's P to the target clock.
4884                  * If the clocks don't match, we can't switch the display clock
4885                  * by using the FP0/FP1. In such case we will disable the LVDS
4886                  * downclock feature.
4887                 */
4888                 has_reduced_clock =
4889                         dev_priv->display.find_dpll(limit, crtc,
4890                                                     dev_priv->lvds_downclock,
4891                                                     refclk, &clock,
4892                                                     &reduced_clock);
4893         }
4894         /* Compat-code for transition, will disappear. */
4895         if (!intel_crtc->config.clock_set) {
4896                 intel_crtc->config.dpll.n = clock.n;
4897                 intel_crtc->config.dpll.m1 = clock.m1;
4898                 intel_crtc->config.dpll.m2 = clock.m2;
4899                 intel_crtc->config.dpll.p1 = clock.p1;
4900                 intel_crtc->config.dpll.p2 = clock.p2;
4901         }
4902
4903         if (IS_GEN2(dev))
4904                 i8xx_update_pll(intel_crtc,
4905                                 has_reduced_clock ? &reduced_clock : NULL,
4906                                 num_connectors);
4907         else if (IS_VALLEYVIEW(dev))
4908                 vlv_update_pll(intel_crtc);
4909         else
4910                 i9xx_update_pll(intel_crtc,
4911                                 has_reduced_clock ? &reduced_clock : NULL,
4912                                 num_connectors);
4913
4914         /* Set up the display plane register */
4915         dspcntr = DISPPLANE_GAMMA_ENABLE;
4916
4917         if (!IS_VALLEYVIEW(dev)) {
4918                 if (pipe == 0)
4919                         dspcntr &= ~DISPPLANE_SEL_PIPE_MASK;
4920                 else
4921                         dspcntr |= DISPPLANE_SEL_PIPE_B;
4922         }
4923
4924         intel_set_pipe_timings(intel_crtc);
4925
4926         /* pipesrc and dspsize control the size that is scaled from,
4927          * which should always be the user's requested size.
4928          */
4929         I915_WRITE(DSPSIZE(plane),
4930                    ((mode->vdisplay - 1) << 16) |
4931                    (mode->hdisplay - 1));
4932         I915_WRITE(DSPPOS(plane), 0);
4933
4934         i9xx_set_pipeconf(intel_crtc);
4935
4936         I915_WRITE(DSPCNTR(plane), dspcntr);
4937         POSTING_READ(DSPCNTR(plane));
4938
4939         ret = intel_pipe_set_base(crtc, x, y, fb);
4940
4941         intel_update_watermarks(dev);
4942
4943         return ret;
4944 }
4945
4946 static void i9xx_get_pfit_config(struct intel_crtc *crtc,
4947                                  struct intel_crtc_config *pipe_config)
4948 {
4949         struct drm_device *dev = crtc->base.dev;
4950         struct drm_i915_private *dev_priv = dev->dev_private;
4951         uint32_t tmp;
4952
4953         tmp = I915_READ(PFIT_CONTROL);
4954         if (!(tmp & PFIT_ENABLE))
4955                 return;
4956
4957         /* Check whether the pfit is attached to our pipe. */
4958         if (INTEL_INFO(dev)->gen < 4) {
4959                 if (crtc->pipe != PIPE_B)
4960                         return;
4961         } else {
4962                 if ((tmp & PFIT_PIPE_MASK) != (crtc->pipe << PFIT_PIPE_SHIFT))
4963                         return;
4964         }
4965
4966         pipe_config->gmch_pfit.control = tmp;
4967         pipe_config->gmch_pfit.pgm_ratios = I915_READ(PFIT_PGM_RATIOS);
4968         if (INTEL_INFO(dev)->gen < 5)
4969                 pipe_config->gmch_pfit.lvds_border_bits =
4970                         I915_READ(LVDS) & LVDS_BORDER_ENABLE;
4971 }
4972
4973 static bool i9xx_get_pipe_config(struct intel_crtc *crtc,
4974                                  struct intel_crtc_config *pipe_config)
4975 {
4976         struct drm_device *dev = crtc->base.dev;
4977         struct drm_i915_private *dev_priv = dev->dev_private;
4978         uint32_t tmp;
4979
4980         pipe_config->cpu_transcoder = (enum transcoder) crtc->pipe;
4981         pipe_config->shared_dpll = DPLL_ID_PRIVATE;
4982
4983         tmp = I915_READ(PIPECONF(crtc->pipe));
4984         if (!(tmp & PIPECONF_ENABLE))
4985                 return false;
4986
4987         intel_get_pipe_timings(crtc, pipe_config);
4988
4989         i9xx_get_pfit_config(crtc, pipe_config);
4990
4991         if (INTEL_INFO(dev)->gen >= 4) {
4992                 tmp = I915_READ(DPLL_MD(crtc->pipe));
4993                 pipe_config->pixel_multiplier =
4994                         ((tmp & DPLL_MD_UDI_MULTIPLIER_MASK)
4995                          >> DPLL_MD_UDI_MULTIPLIER_SHIFT) + 1;
4996                 pipe_config->dpll_hw_state.dpll_md = tmp;
4997         } else if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) {
4998                 tmp = I915_READ(DPLL(crtc->pipe));
4999                 pipe_config->pixel_multiplier =
5000                         ((tmp & SDVO_MULTIPLIER_MASK)
5001                          >> SDVO_MULTIPLIER_SHIFT_HIRES) + 1;
5002         } else {
5003                 /* Note that on i915G/GM the pixel multiplier is in the sdvo
5004                  * port and will be fixed up in the encoder->get_config
5005                  * function. */
5006                 pipe_config->pixel_multiplier = 1;
5007         }
5008         pipe_config->dpll_hw_state.dpll = I915_READ(DPLL(crtc->pipe));
5009         if (!IS_VALLEYVIEW(dev)) {
5010                 pipe_config->dpll_hw_state.fp0 = I915_READ(FP0(crtc->pipe));
5011                 pipe_config->dpll_hw_state.fp1 = I915_READ(FP1(crtc->pipe));
5012         } else {
5013                 /* Mask out read-only status bits. */
5014                 pipe_config->dpll_hw_state.dpll &= ~(DPLL_LOCK_VLV |
5015                                                      DPLL_PORTC_READY_MASK |
5016                                                      DPLL_PORTB_READY_MASK);
5017         }
5018
5019         return true;
5020 }
5021
5022 static void ironlake_init_pch_refclk(struct drm_device *dev)
5023 {
5024         struct drm_i915_private *dev_priv = dev->dev_private;
5025         struct drm_mode_config *mode_config = &dev->mode_config;
5026         struct intel_encoder *encoder;
5027         u32 val, final;
5028         bool has_lvds = false;
5029         bool has_cpu_edp = false;
5030         bool has_panel = false;
5031         bool has_ck505 = false;
5032         bool can_ssc = false;
5033
5034         /* We need to take the global config into account */
5035         list_for_each_entry(encoder, &mode_config->encoder_list,
5036                             base.head) {
5037                 switch (encoder->type) {
5038                 case INTEL_OUTPUT_LVDS:
5039                         has_panel = true;
5040                         has_lvds = true;
5041                         break;
5042                 case INTEL_OUTPUT_EDP:
5043                         has_panel = true;
5044                         if (enc_to_dig_port(&encoder->base)->port == PORT_A)
5045                                 has_cpu_edp = true;
5046                         break;
5047                 }
5048         }
5049
5050         if (HAS_PCH_IBX(dev)) {
5051                 has_ck505 = dev_priv->vbt.display_clock_mode;
5052                 can_ssc = has_ck505;
5053         } else {
5054                 has_ck505 = false;
5055                 can_ssc = true;
5056         }
5057
5058         DRM_DEBUG_KMS("has_panel %d has_lvds %d has_ck505 %d\n",
5059                       has_panel, has_lvds, has_ck505);
5060
5061         /* Ironlake: try to setup display ref clock before DPLL
5062          * enabling. This is only under driver's control after
5063          * PCH B stepping, previous chipset stepping should be
5064          * ignoring this setting.
5065          */
5066         val = I915_READ(PCH_DREF_CONTROL);
5067
5068         /* As we must carefully and slowly disable/enable each source in turn,
5069          * compute the final state we want first and check if we need to
5070          * make any changes at all.
5071          */
5072         final = val;
5073         final &= ~DREF_NONSPREAD_SOURCE_MASK;
5074         if (has_ck505)
5075                 final |= DREF_NONSPREAD_CK505_ENABLE;
5076         else
5077                 final |= DREF_NONSPREAD_SOURCE_ENABLE;
5078
5079         final &= ~DREF_SSC_SOURCE_MASK;
5080         final &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
5081         final &= ~DREF_SSC1_ENABLE;
5082
5083         if (has_panel) {
5084                 final |= DREF_SSC_SOURCE_ENABLE;
5085
5086                 if (intel_panel_use_ssc(dev_priv) && can_ssc)
5087                         final |= DREF_SSC1_ENABLE;
5088
5089                 if (has_cpu_edp) {
5090                         if (intel_panel_use_ssc(dev_priv) && can_ssc)
5091                                 final |= DREF_CPU_SOURCE_OUTPUT_DOWNSPREAD;
5092                         else
5093                                 final |= DREF_CPU_SOURCE_OUTPUT_NONSPREAD;
5094                 } else
5095                         final |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
5096         } else {
5097                 final |= DREF_SSC_SOURCE_DISABLE;
5098                 final |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
5099         }
5100
5101         if (final == val)
5102                 return;
5103
5104         /* Always enable nonspread source */
5105         val &= ~DREF_NONSPREAD_SOURCE_MASK;
5106
5107         if (has_ck505)
5108                 val |= DREF_NONSPREAD_CK505_ENABLE;
5109         else
5110                 val |= DREF_NONSPREAD_SOURCE_ENABLE;
5111
5112         if (has_panel) {
5113                 val &= ~DREF_SSC_SOURCE_MASK;
5114                 val |= DREF_SSC_SOURCE_ENABLE;
5115
5116                 /* SSC must be turned on before enabling the CPU output  */
5117                 if (intel_panel_use_ssc(dev_priv) && can_ssc) {
5118                         DRM_DEBUG_KMS("Using SSC on panel\n");
5119                         val |= DREF_SSC1_ENABLE;
5120                 } else
5121                         val &= ~DREF_SSC1_ENABLE;
5122
5123                 /* Get SSC going before enabling the outputs */
5124                 I915_WRITE(PCH_DREF_CONTROL, val);
5125                 POSTING_READ(PCH_DREF_CONTROL);
5126                 udelay(200);
5127
5128                 val &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
5129
5130                 /* Enable CPU source on CPU attached eDP */
5131                 if (has_cpu_edp) {
5132                         if (intel_panel_use_ssc(dev_priv) && can_ssc) {
5133                                 DRM_DEBUG_KMS("Using SSC on eDP\n");
5134                                 val |= DREF_CPU_SOURCE_OUTPUT_DOWNSPREAD;
5135                         }
5136                         else
5137                                 val |= DREF_CPU_SOURCE_OUTPUT_NONSPREAD;
5138                 } else
5139                         val |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
5140
5141                 I915_WRITE(PCH_DREF_CONTROL, val);
5142                 POSTING_READ(PCH_DREF_CONTROL);
5143                 udelay(200);
5144         } else {
5145                 DRM_DEBUG_KMS("Disabling SSC entirely\n");
5146
5147                 val &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
5148
5149                 /* Turn off CPU output */
5150                 val |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
5151
5152                 I915_WRITE(PCH_DREF_CONTROL, val);
5153                 POSTING_READ(PCH_DREF_CONTROL);
5154                 udelay(200);
5155
5156                 /* Turn off the SSC source */
5157                 val &= ~DREF_SSC_SOURCE_MASK;
5158                 val |= DREF_SSC_SOURCE_DISABLE;
5159
5160                 /* Turn off SSC1 */
5161                 val &= ~DREF_SSC1_ENABLE;
5162
5163                 I915_WRITE(PCH_DREF_CONTROL, val);
5164                 POSTING_READ(PCH_DREF_CONTROL);
5165                 udelay(200);
5166         }
5167
5168         BUG_ON(val != final);
5169 }
5170
5171 static void lpt_reset_fdi_mphy(struct drm_i915_private *dev_priv)
5172 {
5173         uint32_t tmp;
5174
5175         tmp = I915_READ(SOUTH_CHICKEN2);
5176         tmp |= FDI_MPHY_IOSFSB_RESET_CTL;
5177         I915_WRITE(SOUTH_CHICKEN2, tmp);
5178
5179         if (wait_for_atomic_us(I915_READ(SOUTH_CHICKEN2) &
5180                                FDI_MPHY_IOSFSB_RESET_STATUS, 100))
5181                 DRM_ERROR("FDI mPHY reset assert timeout\n");
5182
5183         tmp = I915_READ(SOUTH_CHICKEN2);
5184         tmp &= ~FDI_MPHY_IOSFSB_RESET_CTL;
5185         I915_WRITE(SOUTH_CHICKEN2, tmp);
5186
5187         if (wait_for_atomic_us((I915_READ(SOUTH_CHICKEN2) &
5188                                 FDI_MPHY_IOSFSB_RESET_STATUS) == 0, 100))
5189                 DRM_ERROR("FDI mPHY reset de-assert timeout\n");
5190 }
5191
5192 /* WaMPhyProgramming:hsw */
5193 static void lpt_program_fdi_mphy(struct drm_i915_private *dev_priv)
5194 {
5195         uint32_t tmp;
5196
5197         tmp = intel_sbi_read(dev_priv, 0x8008, SBI_MPHY);
5198         tmp &= ~(0xFF << 24);
5199         tmp |= (0x12 << 24);
5200         intel_sbi_write(dev_priv, 0x8008, tmp, SBI_MPHY);
5201
5202         tmp = intel_sbi_read(dev_priv, 0x2008, SBI_MPHY);
5203         tmp |= (1 << 11);
5204         intel_sbi_write(dev_priv, 0x2008, tmp, SBI_MPHY);
5205
5206         tmp = intel_sbi_read(dev_priv, 0x2108, SBI_MPHY);
5207         tmp |= (1 << 11);
5208         intel_sbi_write(dev_priv, 0x2108, tmp, SBI_MPHY);
5209
5210         tmp = intel_sbi_read(dev_priv, 0x206C, SBI_MPHY);
5211         tmp |= (1 << 24) | (1 << 21) | (1 << 18);
5212         intel_sbi_write(dev_priv, 0x206C, tmp, SBI_MPHY);
5213
5214         tmp = intel_sbi_read(dev_priv, 0x216C, SBI_MPHY);
5215         tmp |= (1 << 24) | (1 << 21) | (1 << 18);
5216         intel_sbi_write(dev_priv, 0x216C, tmp, SBI_MPHY);
5217
5218         tmp = intel_sbi_read(dev_priv, 0x2080, SBI_MPHY);
5219         tmp &= ~(7 << 13);
5220         tmp |= (5 << 13);
5221         intel_sbi_write(dev_priv, 0x2080, tmp, SBI_MPHY);
5222
5223         tmp = intel_sbi_read(dev_priv, 0x2180, SBI_MPHY);
5224         tmp &= ~(7 << 13);
5225         tmp |= (5 << 13);
5226         intel_sbi_write(dev_priv, 0x2180, tmp, SBI_MPHY);
5227
5228         tmp = intel_sbi_read(dev_priv, 0x208C, SBI_MPHY);
5229         tmp &= ~0xFF;
5230         tmp |= 0x1C;
5231         intel_sbi_write(dev_priv, 0x208C, tmp, SBI_MPHY);
5232
5233         tmp = intel_sbi_read(dev_priv, 0x218C, SBI_MPHY);
5234         tmp &= ~0xFF;
5235         tmp |= 0x1C;
5236         intel_sbi_write(dev_priv, 0x218C, tmp, SBI_MPHY);
5237
5238         tmp = intel_sbi_read(dev_priv, 0x2098, SBI_MPHY);
5239         tmp &= ~(0xFF << 16);
5240         tmp |= (0x1C << 16);
5241         intel_sbi_write(dev_priv, 0x2098, tmp, SBI_MPHY);
5242
5243         tmp = intel_sbi_read(dev_priv, 0x2198, SBI_MPHY);
5244         tmp &= ~(0xFF << 16);
5245         tmp |= (0x1C << 16);
5246         intel_sbi_write(dev_priv, 0x2198, tmp, SBI_MPHY);
5247
5248         tmp = intel_sbi_read(dev_priv, 0x20C4, SBI_MPHY);
5249         tmp |= (1 << 27);
5250         intel_sbi_write(dev_priv, 0x20C4, tmp, SBI_MPHY);
5251
5252         tmp = intel_sbi_read(dev_priv, 0x21C4, SBI_MPHY);
5253         tmp |= (1 << 27);
5254         intel_sbi_write(dev_priv, 0x21C4, tmp, SBI_MPHY);
5255
5256         tmp = intel_sbi_read(dev_priv, 0x20EC, SBI_MPHY);
5257         tmp &= ~(0xF << 28);
5258         tmp |= (4 << 28);
5259         intel_sbi_write(dev_priv, 0x20EC, tmp, SBI_MPHY);
5260
5261         tmp = intel_sbi_read(dev_priv, 0x21EC, SBI_MPHY);
5262         tmp &= ~(0xF << 28);
5263         tmp |= (4 << 28);
5264         intel_sbi_write(dev_priv, 0x21EC, tmp, SBI_MPHY);
5265 }
5266
5267 /* Implements 3 different sequences from BSpec chapter "Display iCLK
5268  * Programming" based on the parameters passed:
5269  * - Sequence to enable CLKOUT_DP
5270  * - Sequence to enable CLKOUT_DP without spread
5271  * - Sequence to enable CLKOUT_DP for FDI usage and configure PCH FDI I/O
5272  */
5273 static void lpt_enable_clkout_dp(struct drm_device *dev, bool with_spread,
5274                                  bool with_fdi)
5275 {
5276         struct drm_i915_private *dev_priv = dev->dev_private;
5277         uint32_t reg, tmp;
5278
5279         if (WARN(with_fdi && !with_spread, "FDI requires downspread\n"))
5280                 with_spread = true;
5281         if (WARN(dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE &&
5282                  with_fdi, "LP PCH doesn't have FDI\n"))
5283                 with_fdi = false;
5284
5285         mutex_lock(&dev_priv->dpio_lock);
5286
5287         tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
5288         tmp &= ~SBI_SSCCTL_DISABLE;
5289         tmp |= SBI_SSCCTL_PATHALT;
5290         intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
5291
5292         udelay(24);
5293
5294         if (with_spread) {
5295                 tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
5296                 tmp &= ~SBI_SSCCTL_PATHALT;
5297                 intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
5298
5299                 if (with_fdi) {
5300                         lpt_reset_fdi_mphy(dev_priv);
5301                         lpt_program_fdi_mphy(dev_priv);
5302                 }
5303         }
5304
5305         reg = (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) ?
5306                SBI_GEN0 : SBI_DBUFF0;
5307         tmp = intel_sbi_read(dev_priv, reg, SBI_ICLK);
5308         tmp |= SBI_GEN0_CFG_BUFFENABLE_DISABLE;
5309         intel_sbi_write(dev_priv, reg, tmp, SBI_ICLK);
5310
5311         mutex_unlock(&dev_priv->dpio_lock);
5312 }
5313
5314 /* Sequence to disable CLKOUT_DP */
5315 static void lpt_disable_clkout_dp(struct drm_device *dev)
5316 {
5317         struct drm_i915_private *dev_priv = dev->dev_private;
5318         uint32_t reg, tmp;
5319
5320         mutex_lock(&dev_priv->dpio_lock);
5321
5322         reg = (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) ?
5323                SBI_GEN0 : SBI_DBUFF0;
5324         tmp = intel_sbi_read(dev_priv, reg, SBI_ICLK);
5325         tmp &= ~SBI_GEN0_CFG_BUFFENABLE_DISABLE;
5326         intel_sbi_write(dev_priv, reg, tmp, SBI_ICLK);
5327
5328         tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
5329         if (!(tmp & SBI_SSCCTL_DISABLE)) {
5330                 if (!(tmp & SBI_SSCCTL_PATHALT)) {
5331                         tmp |= SBI_SSCCTL_PATHALT;
5332                         intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
5333                         udelay(32);
5334                 }
5335                 tmp |= SBI_SSCCTL_DISABLE;
5336                 intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
5337         }
5338
5339         mutex_unlock(&dev_priv->dpio_lock);
5340 }
5341
5342 static void lpt_init_pch_refclk(struct drm_device *dev)
5343 {
5344         struct drm_mode_config *mode_config = &dev->mode_config;
5345         struct intel_encoder *encoder;
5346         bool has_vga = false;
5347
5348         list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
5349                 switch (encoder->type) {
5350                 case INTEL_OUTPUT_ANALOG:
5351                         has_vga = true;
5352                         break;
5353                 }
5354         }
5355
5356         if (has_vga)
5357                 lpt_enable_clkout_dp(dev, true, true);
5358         else
5359                 lpt_disable_clkout_dp(dev);
5360 }
5361
5362 /*
5363  * Initialize reference clocks when the driver loads
5364  */
5365 void intel_init_pch_refclk(struct drm_device *dev)
5366 {
5367         if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
5368                 ironlake_init_pch_refclk(dev);
5369         else if (HAS_PCH_LPT(dev))
5370                 lpt_init_pch_refclk(dev);
5371 }
5372
5373 static int ironlake_get_refclk(struct drm_crtc *crtc)
5374 {
5375         struct drm_device *dev = crtc->dev;
5376         struct drm_i915_private *dev_priv = dev->dev_private;
5377         struct intel_encoder *encoder;
5378         int num_connectors = 0;
5379         bool is_lvds = false;
5380
5381         for_each_encoder_on_crtc(dev, crtc, encoder) {
5382                 switch (encoder->type) {
5383                 case INTEL_OUTPUT_LVDS:
5384                         is_lvds = true;
5385                         break;
5386                 }
5387                 num_connectors++;
5388         }
5389
5390         if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2) {
5391                 DRM_DEBUG_KMS("using SSC reference clock of %d MHz\n",
5392                               dev_priv->vbt.lvds_ssc_freq);
5393                 return dev_priv->vbt.lvds_ssc_freq * 1000;
5394         }
5395
5396         return 120000;
5397 }
5398
5399 static void ironlake_set_pipeconf(struct drm_crtc *crtc)
5400 {
5401         struct drm_i915_private *dev_priv = crtc->dev->dev_private;
5402         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5403         int pipe = intel_crtc->pipe;
5404         uint32_t val;
5405
5406         val = 0;
5407
5408         switch (intel_crtc->config.pipe_bpp) {
5409         case 18:
5410                 val |= PIPECONF_6BPC;
5411                 break;
5412         case 24:
5413                 val |= PIPECONF_8BPC;
5414                 break;
5415         case 30:
5416                 val |= PIPECONF_10BPC;
5417                 break;
5418         case 36:
5419                 val |= PIPECONF_12BPC;
5420                 break;
5421         default:
5422                 /* Case prevented by intel_choose_pipe_bpp_dither. */
5423                 BUG();
5424         }
5425
5426         if (intel_crtc->config.dither)
5427                 val |= (PIPECONF_DITHER_EN | PIPECONF_DITHER_TYPE_SP);
5428
5429         if (intel_crtc->config.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE)
5430                 val |= PIPECONF_INTERLACED_ILK;
5431         else
5432                 val |= PIPECONF_PROGRESSIVE;
5433
5434         if (intel_crtc->config.limited_color_range)
5435                 val |= PIPECONF_COLOR_RANGE_SELECT;
5436
5437         I915_WRITE(PIPECONF(pipe), val);
5438         POSTING_READ(PIPECONF(pipe));
5439 }
5440
5441 /*
5442  * Set up the pipe CSC unit.
5443  *
5444  * Currently only full range RGB to limited range RGB conversion
5445  * is supported, but eventually this should handle various
5446  * RGB<->YCbCr scenarios as well.
5447  */
5448 static void intel_set_pipe_csc(struct drm_crtc *crtc)
5449 {
5450         struct drm_device *dev = crtc->dev;
5451         struct drm_i915_private *dev_priv = dev->dev_private;
5452         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5453         int pipe = intel_crtc->pipe;
5454         uint16_t coeff = 0x7800; /* 1.0 */
5455
5456         /*
5457          * TODO: Check what kind of values actually come out of the pipe
5458          * with these coeff/postoff values and adjust to get the best
5459          * accuracy. Perhaps we even need to take the bpc value into
5460          * consideration.
5461          */
5462
5463         if (intel_crtc->config.limited_color_range)
5464                 coeff = ((235 - 16) * (1 << 12) / 255) & 0xff8; /* 0.xxx... */
5465
5466         /*
5467          * GY/GU and RY/RU should be the other way around according
5468          * to BSpec, but reality doesn't agree. Just set them up in
5469          * a way that results in the correct picture.
5470          */
5471         I915_WRITE(PIPE_CSC_COEFF_RY_GY(pipe), coeff << 16);
5472         I915_WRITE(PIPE_CSC_COEFF_BY(pipe), 0);
5473
5474         I915_WRITE(PIPE_CSC_COEFF_RU_GU(pipe), coeff);
5475         I915_WRITE(PIPE_CSC_COEFF_BU(pipe), 0);
5476
5477         I915_WRITE(PIPE_CSC_COEFF_RV_GV(pipe), 0);
5478         I915_WRITE(PIPE_CSC_COEFF_BV(pipe), coeff << 16);
5479
5480         I915_WRITE(PIPE_CSC_PREOFF_HI(pipe), 0);
5481         I915_WRITE(PIPE_CSC_PREOFF_ME(pipe), 0);
5482         I915_WRITE(PIPE_CSC_PREOFF_LO(pipe), 0);
5483
5484         if (INTEL_INFO(dev)->gen > 6) {
5485                 uint16_t postoff = 0;
5486
5487                 if (intel_crtc->config.limited_color_range)
5488                         postoff = (16 * (1 << 13) / 255) & 0x1fff;
5489
5490                 I915_WRITE(PIPE_CSC_POSTOFF_HI(pipe), postoff);
5491                 I915_WRITE(PIPE_CSC_POSTOFF_ME(pipe), postoff);
5492                 I915_WRITE(PIPE_CSC_POSTOFF_LO(pipe), postoff);
5493
5494                 I915_WRITE(PIPE_CSC_MODE(pipe), 0);
5495         } else {
5496                 uint32_t mode = CSC_MODE_YUV_TO_RGB;
5497
5498                 if (intel_crtc->config.limited_color_range)
5499                         mode |= CSC_BLACK_SCREEN_OFFSET;
5500
5501                 I915_WRITE(PIPE_CSC_MODE(pipe), mode);
5502         }
5503 }
5504
5505 static void haswell_set_pipeconf(struct drm_crtc *crtc)
5506 {
5507         struct drm_i915_private *dev_priv = crtc->dev->dev_private;
5508         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5509         enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
5510         uint32_t val;
5511
5512         val = 0;
5513
5514         if (intel_crtc->config.dither)
5515                 val |= (PIPECONF_DITHER_EN | PIPECONF_DITHER_TYPE_SP);
5516
5517         if (intel_crtc->config.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE)
5518                 val |= PIPECONF_INTERLACED_ILK;
5519         else
5520                 val |= PIPECONF_PROGRESSIVE;
5521
5522         I915_WRITE(PIPECONF(cpu_transcoder), val);
5523         POSTING_READ(PIPECONF(cpu_transcoder));
5524
5525         I915_WRITE(GAMMA_MODE(intel_crtc->pipe), GAMMA_MODE_MODE_8BIT);
5526         POSTING_READ(GAMMA_MODE(intel_crtc->pipe));
5527 }
5528
5529 static bool ironlake_compute_clocks(struct drm_crtc *crtc,
5530                                     intel_clock_t *clock,
5531                                     bool *has_reduced_clock,
5532                                     intel_clock_t *reduced_clock)
5533 {
5534         struct drm_device *dev = crtc->dev;
5535         struct drm_i915_private *dev_priv = dev->dev_private;
5536         struct intel_encoder *intel_encoder;
5537         int refclk;
5538         const intel_limit_t *limit;
5539         bool ret, is_lvds = false;
5540
5541         for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
5542                 switch (intel_encoder->type) {
5543                 case INTEL_OUTPUT_LVDS:
5544                         is_lvds = true;
5545                         break;
5546                 }
5547         }
5548
5549         refclk = ironlake_get_refclk(crtc);
5550
5551         /*
5552          * Returns a set of divisors for the desired target clock with the given
5553          * refclk, or FALSE.  The returned values represent the clock equation:
5554          * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
5555          */
5556         limit = intel_limit(crtc, refclk);
5557         ret = dev_priv->display.find_dpll(limit, crtc,
5558                                           to_intel_crtc(crtc)->config.port_clock,
5559                                           refclk, NULL, clock);
5560         if (!ret)
5561                 return false;
5562
5563         if (is_lvds && dev_priv->lvds_downclock_avail) {
5564                 /*
5565                  * Ensure we match the reduced clock's P to the target clock.
5566                  * If the clocks don't match, we can't switch the display clock
5567                  * by using the FP0/FP1. In such case we will disable the LVDS
5568                  * downclock feature.
5569                 */
5570                 *has_reduced_clock =
5571                         dev_priv->display.find_dpll(limit, crtc,
5572                                                     dev_priv->lvds_downclock,
5573                                                     refclk, clock,
5574                                                     reduced_clock);
5575         }
5576
5577         return true;
5578 }
5579
5580 static void cpt_enable_fdi_bc_bifurcation(struct drm_device *dev)
5581 {
5582         struct drm_i915_private *dev_priv = dev->dev_private;
5583         uint32_t temp;
5584
5585         temp = I915_READ(SOUTH_CHICKEN1);
5586         if (temp & FDI_BC_BIFURCATION_SELECT)
5587                 return;
5588
5589         WARN_ON(I915_READ(FDI_RX_CTL(PIPE_B)) & FDI_RX_ENABLE);
5590         WARN_ON(I915_READ(FDI_RX_CTL(PIPE_C)) & FDI_RX_ENABLE);
5591
5592         temp |= FDI_BC_BIFURCATION_SELECT;
5593         DRM_DEBUG_KMS("enabling fdi C rx\n");
5594         I915_WRITE(SOUTH_CHICKEN1, temp);
5595         POSTING_READ(SOUTH_CHICKEN1);
5596 }
5597
5598 static void ivybridge_update_fdi_bc_bifurcation(struct intel_crtc *intel_crtc)
5599 {
5600         struct drm_device *dev = intel_crtc->base.dev;
5601         struct drm_i915_private *dev_priv = dev->dev_private;
5602
5603         switch (intel_crtc->pipe) {
5604         case PIPE_A:
5605                 break;
5606         case PIPE_B:
5607                 if (intel_crtc->config.fdi_lanes > 2)
5608                         WARN_ON(I915_READ(SOUTH_CHICKEN1) & FDI_BC_BIFURCATION_SELECT);
5609                 else
5610                         cpt_enable_fdi_bc_bifurcation(dev);
5611
5612                 break;
5613         case PIPE_C:
5614                 cpt_enable_fdi_bc_bifurcation(dev);
5615
5616                 break;
5617         default:
5618                 BUG();
5619         }
5620 }
5621
5622 int ironlake_get_lanes_required(int target_clock, int link_bw, int bpp)
5623 {
5624         /*
5625          * Account for spread spectrum to avoid
5626          * oversubscribing the link. Max center spread
5627          * is 2.5%; use 5% for safety's sake.
5628          */
5629         u32 bps = target_clock * bpp * 21 / 20;
5630         return bps / (link_bw * 8) + 1;
5631 }
5632
5633 static bool ironlake_needs_fb_cb_tune(struct dpll *dpll, int factor)
5634 {
5635         return i9xx_dpll_compute_m(dpll) < factor * dpll->n;
5636 }
5637
5638 static uint32_t ironlake_compute_dpll(struct intel_crtc *intel_crtc,
5639                                       u32 *fp,
5640                                       intel_clock_t *reduced_clock, u32 *fp2)
5641 {
5642         struct drm_crtc *crtc = &intel_crtc->base;
5643         struct drm_device *dev = crtc->dev;
5644         struct drm_i915_private *dev_priv = dev->dev_private;
5645         struct intel_encoder *intel_encoder;
5646         uint32_t dpll;
5647         int factor, num_connectors = 0;
5648         bool is_lvds = false, is_sdvo = false;
5649
5650         for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
5651                 switch (intel_encoder->type) {
5652                 case INTEL_OUTPUT_LVDS:
5653                         is_lvds = true;
5654                         break;
5655                 case INTEL_OUTPUT_SDVO:
5656                 case INTEL_OUTPUT_HDMI:
5657                         is_sdvo = true;
5658                         break;
5659                 }
5660
5661                 num_connectors++;
5662         }
5663
5664         /* Enable autotuning of the PLL clock (if permissible) */
5665         factor = 21;
5666         if (is_lvds) {
5667                 if ((intel_panel_use_ssc(dev_priv) &&
5668                      dev_priv->vbt.lvds_ssc_freq == 100) ||
5669                     (HAS_PCH_IBX(dev) && intel_is_dual_link_lvds(dev)))
5670                         factor = 25;
5671         } else if (intel_crtc->config.sdvo_tv_clock)
5672                 factor = 20;
5673
5674         if (ironlake_needs_fb_cb_tune(&intel_crtc->config.dpll, factor))
5675                 *fp |= FP_CB_TUNE;
5676
5677         if (fp2 && (reduced_clock->m < factor * reduced_clock->n))
5678                 *fp2 |= FP_CB_TUNE;
5679
5680         dpll = 0;
5681
5682         if (is_lvds)
5683                 dpll |= DPLLB_MODE_LVDS;
5684         else
5685                 dpll |= DPLLB_MODE_DAC_SERIAL;
5686
5687         dpll |= (intel_crtc->config.pixel_multiplier - 1)
5688                 << PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT;
5689
5690         if (is_sdvo)
5691                 dpll |= DPLL_SDVO_HIGH_SPEED;
5692         if (intel_crtc->config.has_dp_encoder)
5693                 dpll |= DPLL_SDVO_HIGH_SPEED;
5694
5695         /* compute bitmask from p1 value */
5696         dpll |= (1 << (intel_crtc->config.dpll.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
5697         /* also FPA1 */
5698         dpll |= (1 << (intel_crtc->config.dpll.p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
5699
5700         switch (intel_crtc->config.dpll.p2) {
5701         case 5:
5702                 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
5703                 break;
5704         case 7:
5705                 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
5706                 break;
5707         case 10:
5708                 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
5709                 break;
5710         case 14:
5711                 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
5712                 break;
5713         }
5714
5715         if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2)
5716                 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
5717         else
5718                 dpll |= PLL_REF_INPUT_DREFCLK;
5719
5720         return dpll | DPLL_VCO_ENABLE;
5721 }
5722
5723 static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
5724                                   int x, int y,
5725                                   struct drm_framebuffer *fb)
5726 {
5727         struct drm_device *dev = crtc->dev;
5728         struct drm_i915_private *dev_priv = dev->dev_private;
5729         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5730         int pipe = intel_crtc->pipe;
5731         int plane = intel_crtc->plane;
5732         int num_connectors = 0;
5733         intel_clock_t clock, reduced_clock;
5734         u32 dpll = 0, fp = 0, fp2 = 0;
5735         bool ok, has_reduced_clock = false;
5736         bool is_lvds = false;
5737         struct intel_encoder *encoder;
5738         struct intel_shared_dpll *pll;
5739         int ret;
5740
5741         for_each_encoder_on_crtc(dev, crtc, encoder) {
5742                 switch (encoder->type) {
5743                 case INTEL_OUTPUT_LVDS:
5744                         is_lvds = true;
5745                         break;
5746                 }
5747
5748                 num_connectors++;
5749         }
5750
5751         WARN(!(HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)),
5752              "Unexpected PCH type %d\n", INTEL_PCH_TYPE(dev));
5753
5754         ok = ironlake_compute_clocks(crtc, &clock,
5755                                      &has_reduced_clock, &reduced_clock);
5756         if (!ok && !intel_crtc->config.clock_set) {
5757                 DRM_ERROR("Couldn't find PLL settings for mode!\n");
5758                 return -EINVAL;
5759         }
5760         /* Compat-code for transition, will disappear. */
5761         if (!intel_crtc->config.clock_set) {
5762                 intel_crtc->config.dpll.n = clock.n;
5763                 intel_crtc->config.dpll.m1 = clock.m1;
5764                 intel_crtc->config.dpll.m2 = clock.m2;
5765                 intel_crtc->config.dpll.p1 = clock.p1;
5766                 intel_crtc->config.dpll.p2 = clock.p2;
5767         }
5768
5769         /* Ensure that the cursor is valid for the new mode before changing... */
5770         intel_crtc_update_cursor(crtc, true);
5771
5772         /* CPU eDP is the only output that doesn't need a PCH PLL of its own. */
5773         if (intel_crtc->config.has_pch_encoder) {
5774                 fp = i9xx_dpll_compute_fp(&intel_crtc->config.dpll);
5775                 if (has_reduced_clock)
5776                         fp2 = i9xx_dpll_compute_fp(&reduced_clock);
5777
5778                 dpll = ironlake_compute_dpll(intel_crtc,
5779                                              &fp, &reduced_clock,
5780                                              has_reduced_clock ? &fp2 : NULL);
5781
5782                 intel_crtc->config.dpll_hw_state.dpll = dpll;
5783                 intel_crtc->config.dpll_hw_state.fp0 = fp;
5784                 if (has_reduced_clock)
5785                         intel_crtc->config.dpll_hw_state.fp1 = fp2;
5786                 else
5787                         intel_crtc->config.dpll_hw_state.fp1 = fp;
5788
5789                 pll = intel_get_shared_dpll(intel_crtc);
5790                 if (pll == NULL) {
5791                         DRM_DEBUG_DRIVER("failed to find PLL for pipe %c\n",
5792                                          pipe_name(pipe));
5793                         return -EINVAL;
5794                 }
5795         } else
5796                 intel_put_shared_dpll(intel_crtc);
5797
5798         if (intel_crtc->config.has_dp_encoder)
5799                 intel_dp_set_m_n(intel_crtc);
5800
5801         if (is_lvds && has_reduced_clock && i915_powersave)
5802                 intel_crtc->lowfreq_avail = true;
5803         else
5804                 intel_crtc->lowfreq_avail = false;
5805
5806         if (intel_crtc->config.has_pch_encoder) {
5807                 pll = intel_crtc_to_shared_dpll(intel_crtc);
5808
5809         }
5810
5811         intel_set_pipe_timings(intel_crtc);
5812
5813         if (intel_crtc->config.has_pch_encoder) {
5814                 intel_cpu_transcoder_set_m_n(intel_crtc,
5815                                              &intel_crtc->config.fdi_m_n);
5816         }
5817
5818         if (IS_IVYBRIDGE(dev))
5819                 ivybridge_update_fdi_bc_bifurcation(intel_crtc);
5820
5821         ironlake_set_pipeconf(crtc);
5822
5823         /* Set up the display plane register */
5824         I915_WRITE(DSPCNTR(plane), DISPPLANE_GAMMA_ENABLE);
5825         POSTING_READ(DSPCNTR(plane));
5826
5827         ret = intel_pipe_set_base(crtc, x, y, fb);
5828
5829         intel_update_watermarks(dev);
5830
5831         return ret;
5832 }
5833
5834 static void ironlake_get_fdi_m_n_config(struct intel_crtc *crtc,
5835                                         struct intel_crtc_config *pipe_config)
5836 {
5837         struct drm_device *dev = crtc->base.dev;
5838         struct drm_i915_private *dev_priv = dev->dev_private;
5839         enum transcoder transcoder = pipe_config->cpu_transcoder;
5840
5841         pipe_config->fdi_m_n.link_m = I915_READ(PIPE_LINK_M1(transcoder));
5842         pipe_config->fdi_m_n.link_n = I915_READ(PIPE_LINK_N1(transcoder));
5843         pipe_config->fdi_m_n.gmch_m = I915_READ(PIPE_DATA_M1(transcoder))
5844                                         & ~TU_SIZE_MASK;
5845         pipe_config->fdi_m_n.gmch_n = I915_READ(PIPE_DATA_N1(transcoder));
5846         pipe_config->fdi_m_n.tu = ((I915_READ(PIPE_DATA_M1(transcoder))
5847                                    & TU_SIZE_MASK) >> TU_SIZE_SHIFT) + 1;
5848 }
5849
5850 static void ironlake_get_pfit_config(struct intel_crtc *crtc,
5851                                      struct intel_crtc_config *pipe_config)
5852 {
5853         struct drm_device *dev = crtc->base.dev;
5854         struct drm_i915_private *dev_priv = dev->dev_private;
5855         uint32_t tmp;
5856
5857         tmp = I915_READ(PF_CTL(crtc->pipe));
5858
5859         if (tmp & PF_ENABLE) {
5860                 pipe_config->pch_pfit.pos = I915_READ(PF_WIN_POS(crtc->pipe));
5861                 pipe_config->pch_pfit.size = I915_READ(PF_WIN_SZ(crtc->pipe));
5862
5863                 /* We currently do not free assignements of panel fitters on
5864                  * ivb/hsw (since we don't use the higher upscaling modes which
5865                  * differentiates them) so just WARN about this case for now. */
5866                 if (IS_GEN7(dev)) {
5867                         WARN_ON((tmp & PF_PIPE_SEL_MASK_IVB) !=
5868                                 PF_PIPE_SEL_IVB(crtc->pipe));
5869                 }
5870         }
5871 }
5872
5873 static bool ironlake_get_pipe_config(struct intel_crtc *crtc,
5874                                      struct intel_crtc_config *pipe_config)
5875 {
5876         struct drm_device *dev = crtc->base.dev;
5877         struct drm_i915_private *dev_priv = dev->dev_private;
5878         uint32_t tmp;
5879
5880         pipe_config->cpu_transcoder = (enum transcoder) crtc->pipe;
5881         pipe_config->shared_dpll = DPLL_ID_PRIVATE;
5882
5883         tmp = I915_READ(PIPECONF(crtc->pipe));
5884         if (!(tmp & PIPECONF_ENABLE))
5885                 return false;
5886
5887         if (I915_READ(PCH_TRANSCONF(crtc->pipe)) & TRANS_ENABLE) {
5888                 struct intel_shared_dpll *pll;
5889
5890                 pipe_config->has_pch_encoder = true;
5891
5892                 tmp = I915_READ(FDI_RX_CTL(crtc->pipe));
5893                 pipe_config->fdi_lanes = ((FDI_DP_PORT_WIDTH_MASK & tmp) >>
5894                                           FDI_DP_PORT_WIDTH_SHIFT) + 1;
5895
5896                 ironlake_get_fdi_m_n_config(crtc, pipe_config);
5897
5898                 if (HAS_PCH_IBX(dev_priv->dev)) {
5899                         pipe_config->shared_dpll =
5900                                 (enum intel_dpll_id) crtc->pipe;
5901                 } else {
5902                         tmp = I915_READ(PCH_DPLL_SEL);
5903                         if (tmp & TRANS_DPLLB_SEL(crtc->pipe))
5904                                 pipe_config->shared_dpll = DPLL_ID_PCH_PLL_B;
5905                         else
5906                                 pipe_config->shared_dpll = DPLL_ID_PCH_PLL_A;
5907                 }
5908
5909                 pll = &dev_priv->shared_dplls[pipe_config->shared_dpll];
5910
5911                 WARN_ON(!pll->get_hw_state(dev_priv, pll,
5912                                            &pipe_config->dpll_hw_state));
5913
5914                 tmp = pipe_config->dpll_hw_state.dpll;
5915                 pipe_config->pixel_multiplier =
5916                         ((tmp & PLL_REF_SDVO_HDMI_MULTIPLIER_MASK)
5917                          >> PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT) + 1;
5918         } else {
5919                 pipe_config->pixel_multiplier = 1;
5920         }
5921
5922         intel_get_pipe_timings(crtc, pipe_config);
5923
5924         ironlake_get_pfit_config(crtc, pipe_config);
5925
5926         return true;
5927 }
5928
5929 static void assert_can_disable_lcpll(struct drm_i915_private *dev_priv)
5930 {
5931         struct drm_device *dev = dev_priv->dev;
5932         struct intel_ddi_plls *plls = &dev_priv->ddi_plls;
5933         struct intel_crtc *crtc;
5934         unsigned long irqflags;
5935         uint32_t val;
5936
5937         list_for_each_entry(crtc, &dev->mode_config.crtc_list, base.head)
5938                 WARN(crtc->base.enabled, "CRTC for pipe %c enabled\n",
5939                      pipe_name(crtc->pipe));
5940
5941         WARN(I915_READ(HSW_PWR_WELL_DRIVER), "Power well on\n");
5942         WARN(plls->spll_refcount, "SPLL enabled\n");
5943         WARN(plls->wrpll1_refcount, "WRPLL1 enabled\n");
5944         WARN(plls->wrpll2_refcount, "WRPLL2 enabled\n");
5945         WARN(I915_READ(PCH_PP_STATUS) & PP_ON, "Panel power on\n");
5946         WARN(I915_READ(BLC_PWM_CPU_CTL2) & BLM_PWM_ENABLE,
5947              "CPU PWM1 enabled\n");
5948         WARN(I915_READ(HSW_BLC_PWM2_CTL) & BLM_PWM_ENABLE,
5949              "CPU PWM2 enabled\n");
5950         WARN(I915_READ(BLC_PWM_PCH_CTL1) & BLM_PCH_PWM_ENABLE,
5951              "PCH PWM1 enabled\n");
5952         WARN(I915_READ(UTIL_PIN_CTL) & UTIL_PIN_ENABLE,
5953              "Utility pin enabled\n");
5954         WARN(I915_READ(PCH_GTC_CTL) & PCH_GTC_ENABLE, "PCH GTC enabled\n");
5955
5956         spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
5957         val = I915_READ(DEIMR);
5958         WARN((val & ~DE_PCH_EVENT_IVB) != val,
5959              "Unexpected DEIMR bits enabled: 0x%x\n", val);
5960         val = I915_READ(SDEIMR);
5961         WARN((val | SDE_HOTPLUG_MASK_CPT) != 0xffffffff,
5962              "Unexpected SDEIMR bits enabled: 0x%x\n", val);
5963         spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
5964 }
5965
5966 /*
5967  * This function implements pieces of two sequences from BSpec:
5968  * - Sequence for display software to disable LCPLL
5969  * - Sequence for display software to allow package C8+
5970  * The steps implemented here are just the steps that actually touch the LCPLL
5971  * register. Callers should take care of disabling all the display engine
5972  * functions, doing the mode unset, fixing interrupts, etc.
5973  */
5974 void hsw_disable_lcpll(struct drm_i915_private *dev_priv,
5975                        bool switch_to_fclk, bool allow_power_down)
5976 {
5977         uint32_t val;
5978
5979         assert_can_disable_lcpll(dev_priv);
5980
5981         val = I915_READ(LCPLL_CTL);
5982
5983         if (switch_to_fclk) {
5984                 val |= LCPLL_CD_SOURCE_FCLK;
5985                 I915_WRITE(LCPLL_CTL, val);
5986
5987                 if (wait_for_atomic_us(I915_READ(LCPLL_CTL) &
5988                                        LCPLL_CD_SOURCE_FCLK_DONE, 1))
5989                         DRM_ERROR("Switching to FCLK failed\n");
5990
5991                 val = I915_READ(LCPLL_CTL);
5992         }
5993
5994         val |= LCPLL_PLL_DISABLE;
5995         I915_WRITE(LCPLL_CTL, val);
5996         POSTING_READ(LCPLL_CTL);
5997
5998         if (wait_for((I915_READ(LCPLL_CTL) & LCPLL_PLL_LOCK) == 0, 1))
5999                 DRM_ERROR("LCPLL still locked\n");
6000
6001         val = I915_READ(D_COMP);
6002         val |= D_COMP_COMP_DISABLE;
6003         I915_WRITE(D_COMP, val);
6004         POSTING_READ(D_COMP);
6005         ndelay(100);
6006
6007         if (wait_for((I915_READ(D_COMP) & D_COMP_RCOMP_IN_PROGRESS) == 0, 1))
6008                 DRM_ERROR("D_COMP RCOMP still in progress\n");
6009
6010         if (allow_power_down) {
6011                 val = I915_READ(LCPLL_CTL);
6012                 val |= LCPLL_POWER_DOWN_ALLOW;
6013                 I915_WRITE(LCPLL_CTL, val);
6014                 POSTING_READ(LCPLL_CTL);
6015         }
6016 }
6017
6018 /*
6019  * Fully restores LCPLL, disallowing power down and switching back to LCPLL
6020  * source.
6021  */
6022 void hsw_restore_lcpll(struct drm_i915_private *dev_priv)
6023 {
6024         uint32_t val;
6025
6026         val = I915_READ(LCPLL_CTL);
6027
6028         if ((val & (LCPLL_PLL_LOCK | LCPLL_PLL_DISABLE | LCPLL_CD_SOURCE_FCLK |
6029                     LCPLL_POWER_DOWN_ALLOW)) == LCPLL_PLL_LOCK)
6030                 return;
6031
6032         /* Make sure we're not on PC8 state before disabling PC8, otherwise
6033          * we'll hang the machine! */
6034         dev_priv->uncore.funcs.force_wake_get(dev_priv);
6035
6036         if (val & LCPLL_POWER_DOWN_ALLOW) {
6037                 val &= ~LCPLL_POWER_DOWN_ALLOW;
6038                 I915_WRITE(LCPLL_CTL, val);
6039                 POSTING_READ(LCPLL_CTL);
6040         }
6041
6042         val = I915_READ(D_COMP);
6043         val |= D_COMP_COMP_FORCE;
6044         val &= ~D_COMP_COMP_DISABLE;
6045         I915_WRITE(D_COMP, val);
6046         POSTING_READ(D_COMP);
6047
6048         val = I915_READ(LCPLL_CTL);
6049         val &= ~LCPLL_PLL_DISABLE;
6050         I915_WRITE(LCPLL_CTL, val);
6051
6052         if (wait_for(I915_READ(LCPLL_CTL) & LCPLL_PLL_LOCK, 5))
6053                 DRM_ERROR("LCPLL not locked yet\n");
6054
6055         if (val & LCPLL_CD_SOURCE_FCLK) {
6056                 val = I915_READ(LCPLL_CTL);
6057                 val &= ~LCPLL_CD_SOURCE_FCLK;
6058                 I915_WRITE(LCPLL_CTL, val);
6059
6060                 if (wait_for_atomic_us((I915_READ(LCPLL_CTL) &
6061                                         LCPLL_CD_SOURCE_FCLK_DONE) == 0, 1))
6062                         DRM_ERROR("Switching back to LCPLL failed\n");
6063         }
6064
6065         dev_priv->uncore.funcs.force_wake_put(dev_priv);
6066 }
6067
6068 void hsw_enable_pc8_work(struct work_struct *__work)
6069 {
6070         struct drm_i915_private *dev_priv =
6071                 container_of(to_delayed_work(__work), struct drm_i915_private,
6072                              pc8.enable_work);
6073         struct drm_device *dev = dev_priv->dev;
6074         uint32_t val;
6075
6076         if (dev_priv->pc8.enabled)
6077                 return;
6078
6079         DRM_DEBUG_KMS("Enabling package C8+\n");
6080
6081         dev_priv->pc8.enabled = true;
6082
6083         if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
6084                 val = I915_READ(SOUTH_DSPCLK_GATE_D);
6085                 val &= ~PCH_LP_PARTITION_LEVEL_DISABLE;
6086                 I915_WRITE(SOUTH_DSPCLK_GATE_D, val);
6087         }
6088
6089         lpt_disable_clkout_dp(dev);
6090         hsw_pc8_disable_interrupts(dev);
6091         hsw_disable_lcpll(dev_priv, true, true);
6092 }
6093
6094 static void __hsw_enable_package_c8(struct drm_i915_private *dev_priv)
6095 {
6096         WARN_ON(!mutex_is_locked(&dev_priv->pc8.lock));
6097         WARN(dev_priv->pc8.disable_count < 1,
6098              "pc8.disable_count: %d\n", dev_priv->pc8.disable_count);
6099
6100         dev_priv->pc8.disable_count--;
6101         if (dev_priv->pc8.disable_count != 0)
6102                 return;
6103
6104         schedule_delayed_work(&dev_priv->pc8.enable_work,
6105                               msecs_to_jiffies(i915_pc8_timeout));
6106 }
6107
6108 static void __hsw_disable_package_c8(struct drm_i915_private *dev_priv)
6109 {
6110         struct drm_device *dev = dev_priv->dev;
6111         uint32_t val;
6112
6113         WARN_ON(!mutex_is_locked(&dev_priv->pc8.lock));
6114         WARN(dev_priv->pc8.disable_count < 0,
6115              "pc8.disable_count: %d\n", dev_priv->pc8.disable_count);
6116
6117         dev_priv->pc8.disable_count++;
6118         if (dev_priv->pc8.disable_count != 1)
6119                 return;
6120
6121         cancel_delayed_work_sync(&dev_priv->pc8.enable_work);
6122         if (!dev_priv->pc8.enabled)
6123                 return;
6124
6125         DRM_DEBUG_KMS("Disabling package C8+\n");
6126
6127         hsw_restore_lcpll(dev_priv);
6128         hsw_pc8_restore_interrupts(dev);
6129         lpt_init_pch_refclk(dev);
6130
6131         if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
6132                 val = I915_READ(SOUTH_DSPCLK_GATE_D);
6133                 val |= PCH_LP_PARTITION_LEVEL_DISABLE;
6134                 I915_WRITE(SOUTH_DSPCLK_GATE_D, val);
6135         }
6136
6137         intel_prepare_ddi(dev);
6138         i915_gem_init_swizzling(dev);
6139         mutex_lock(&dev_priv->rps.hw_lock);
6140         gen6_update_ring_freq(dev);
6141         mutex_unlock(&dev_priv->rps.hw_lock);
6142         dev_priv->pc8.enabled = false;
6143 }
6144
6145 void hsw_enable_package_c8(struct drm_i915_private *dev_priv)
6146 {
6147         mutex_lock(&dev_priv->pc8.lock);
6148         __hsw_enable_package_c8(dev_priv);
6149         mutex_unlock(&dev_priv->pc8.lock);
6150 }
6151
6152 void hsw_disable_package_c8(struct drm_i915_private *dev_priv)
6153 {
6154         mutex_lock(&dev_priv->pc8.lock);
6155         __hsw_disable_package_c8(dev_priv);
6156         mutex_unlock(&dev_priv->pc8.lock);
6157 }
6158
6159 static bool hsw_can_enable_package_c8(struct drm_i915_private *dev_priv)
6160 {
6161         struct drm_device *dev = dev_priv->dev;
6162         struct intel_crtc *crtc;
6163         uint32_t val;
6164
6165         list_for_each_entry(crtc, &dev->mode_config.crtc_list, base.head)
6166                 if (crtc->base.enabled)
6167                         return false;
6168
6169         /* This case is still possible since we have the i915.disable_power_well
6170          * parameter and also the KVMr or something else might be requesting the
6171          * power well. */
6172         val = I915_READ(HSW_PWR_WELL_DRIVER);
6173         if (val != 0) {
6174                 DRM_DEBUG_KMS("Not enabling PC8: power well on\n");
6175                 return false;
6176         }
6177
6178         return true;
6179 }
6180
6181 /* Since we're called from modeset_global_resources there's no way to
6182  * symmetrically increase and decrease the refcount, so we use
6183  * dev_priv->pc8.requirements_met to track whether we already have the refcount
6184  * or not.
6185  */
6186 static void hsw_update_package_c8(struct drm_device *dev)
6187 {
6188         struct drm_i915_private *dev_priv = dev->dev_private;
6189         bool allow;
6190
6191         if (!i915_enable_pc8)
6192                 return;
6193
6194         mutex_lock(&dev_priv->pc8.lock);
6195
6196         allow = hsw_can_enable_package_c8(dev_priv);
6197
6198         if (allow == dev_priv->pc8.requirements_met)
6199                 goto done;
6200
6201         dev_priv->pc8.requirements_met = allow;
6202
6203         if (allow)
6204                 __hsw_enable_package_c8(dev_priv);
6205         else
6206                 __hsw_disable_package_c8(dev_priv);
6207
6208 done:
6209         mutex_unlock(&dev_priv->pc8.lock);
6210 }
6211
6212 static void hsw_package_c8_gpu_idle(struct drm_i915_private *dev_priv)
6213 {
6214         if (!dev_priv->pc8.gpu_idle) {
6215                 dev_priv->pc8.gpu_idle = true;
6216                 hsw_enable_package_c8(dev_priv);
6217         }
6218 }
6219
6220 static void hsw_package_c8_gpu_busy(struct drm_i915_private *dev_priv)
6221 {
6222         if (dev_priv->pc8.gpu_idle) {
6223                 dev_priv->pc8.gpu_idle = false;
6224                 hsw_disable_package_c8(dev_priv);
6225         }
6226 }
6227
6228 static void haswell_modeset_global_resources(struct drm_device *dev)
6229 {
6230         bool enable = false;
6231         struct intel_crtc *crtc;
6232
6233         list_for_each_entry(crtc, &dev->mode_config.crtc_list, base.head) {
6234                 if (!crtc->base.enabled)
6235                         continue;
6236
6237                 if (crtc->pipe != PIPE_A || crtc->config.pch_pfit.size ||
6238                     crtc->config.cpu_transcoder != TRANSCODER_EDP)
6239                         enable = true;
6240         }
6241
6242         intel_set_power_well(dev, enable);
6243
6244         hsw_update_package_c8(dev);
6245 }
6246
6247 static int haswell_crtc_mode_set(struct drm_crtc *crtc,
6248                                  int x, int y,
6249                                  struct drm_framebuffer *fb)
6250 {
6251         struct drm_device *dev = crtc->dev;
6252         struct drm_i915_private *dev_priv = dev->dev_private;
6253         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6254         int plane = intel_crtc->plane;
6255         int ret;
6256
6257         if (!intel_ddi_pll_mode_set(crtc))
6258                 return -EINVAL;
6259
6260         /* Ensure that the cursor is valid for the new mode before changing... */
6261         intel_crtc_update_cursor(crtc, true);
6262
6263         if (intel_crtc->config.has_dp_encoder)
6264                 intel_dp_set_m_n(intel_crtc);
6265
6266         intel_crtc->lowfreq_avail = false;
6267
6268         intel_set_pipe_timings(intel_crtc);
6269
6270         if (intel_crtc->config.has_pch_encoder) {
6271                 intel_cpu_transcoder_set_m_n(intel_crtc,
6272                                              &intel_crtc->config.fdi_m_n);
6273         }
6274
6275         haswell_set_pipeconf(crtc);
6276
6277         intel_set_pipe_csc(crtc);
6278
6279         /* Set up the display plane register */
6280         I915_WRITE(DSPCNTR(plane), DISPPLANE_GAMMA_ENABLE | DISPPLANE_PIPE_CSC_ENABLE);
6281         POSTING_READ(DSPCNTR(plane));
6282
6283         ret = intel_pipe_set_base(crtc, x, y, fb);
6284
6285         intel_update_watermarks(dev);
6286
6287         return ret;
6288 }
6289
6290 static bool haswell_get_pipe_config(struct intel_crtc *crtc,
6291                                     struct intel_crtc_config *pipe_config)
6292 {
6293         struct drm_device *dev = crtc->base.dev;
6294         struct drm_i915_private *dev_priv = dev->dev_private;
6295         enum intel_display_power_domain pfit_domain;
6296         uint32_t tmp;
6297
6298         pipe_config->cpu_transcoder = (enum transcoder) crtc->pipe;
6299         pipe_config->shared_dpll = DPLL_ID_PRIVATE;
6300
6301         tmp = I915_READ(TRANS_DDI_FUNC_CTL(TRANSCODER_EDP));
6302         if (tmp & TRANS_DDI_FUNC_ENABLE) {
6303                 enum pipe trans_edp_pipe;
6304                 switch (tmp & TRANS_DDI_EDP_INPUT_MASK) {
6305                 default:
6306                         WARN(1, "unknown pipe linked to edp transcoder\n");
6307                 case TRANS_DDI_EDP_INPUT_A_ONOFF:
6308                 case TRANS_DDI_EDP_INPUT_A_ON:
6309                         trans_edp_pipe = PIPE_A;
6310                         break;
6311                 case TRANS_DDI_EDP_INPUT_B_ONOFF:
6312                         trans_edp_pipe = PIPE_B;
6313                         break;
6314                 case TRANS_DDI_EDP_INPUT_C_ONOFF:
6315                         trans_edp_pipe = PIPE_C;
6316                         break;
6317                 }
6318
6319                 if (trans_edp_pipe == crtc->pipe)
6320                         pipe_config->cpu_transcoder = TRANSCODER_EDP;
6321         }
6322
6323         if (!intel_display_power_enabled(dev,
6324                         POWER_DOMAIN_TRANSCODER(pipe_config->cpu_transcoder)))
6325                 return false;
6326
6327         tmp = I915_READ(PIPECONF(pipe_config->cpu_transcoder));
6328         if (!(tmp & PIPECONF_ENABLE))
6329                 return false;
6330
6331         /*
6332          * Haswell has only FDI/PCH transcoder A. It is which is connected to
6333          * DDI E. So just check whether this pipe is wired to DDI E and whether
6334          * the PCH transcoder is on.
6335          */
6336         tmp = I915_READ(TRANS_DDI_FUNC_CTL(pipe_config->cpu_transcoder));
6337         if ((tmp & TRANS_DDI_PORT_MASK) == TRANS_DDI_SELECT_PORT(PORT_E) &&
6338             I915_READ(LPT_TRANSCONF) & TRANS_ENABLE) {
6339                 pipe_config->has_pch_encoder = true;
6340
6341                 tmp = I915_READ(FDI_RX_CTL(PIPE_A));
6342                 pipe_config->fdi_lanes = ((FDI_DP_PORT_WIDTH_MASK & tmp) >>
6343                                           FDI_DP_PORT_WIDTH_SHIFT) + 1;
6344
6345                 ironlake_get_fdi_m_n_config(crtc, pipe_config);
6346         }
6347
6348         intel_get_pipe_timings(crtc, pipe_config);
6349
6350         pfit_domain = POWER_DOMAIN_PIPE_PANEL_FITTER(crtc->pipe);
6351         if (intel_display_power_enabled(dev, pfit_domain))
6352                 ironlake_get_pfit_config(crtc, pipe_config);
6353
6354         pipe_config->ips_enabled = hsw_crtc_supports_ips(crtc) &&
6355                                    (I915_READ(IPS_CTL) & IPS_ENABLE);
6356
6357         pipe_config->pixel_multiplier = 1;
6358
6359         return true;
6360 }
6361
6362 static int intel_crtc_mode_set(struct drm_crtc *crtc,
6363                                int x, int y,
6364                                struct drm_framebuffer *fb)
6365 {
6366         struct drm_device *dev = crtc->dev;
6367         struct drm_i915_private *dev_priv = dev->dev_private;
6368         struct intel_encoder *encoder;
6369         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6370         struct drm_display_mode *mode = &intel_crtc->config.requested_mode;
6371         int pipe = intel_crtc->pipe;
6372         int ret;
6373
6374         drm_vblank_pre_modeset(dev, pipe);
6375
6376         ret = dev_priv->display.crtc_mode_set(crtc, x, y, fb);
6377
6378         drm_vblank_post_modeset(dev, pipe);
6379
6380         if (ret != 0)
6381                 return ret;
6382
6383         for_each_encoder_on_crtc(dev, crtc, encoder) {
6384                 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
6385                         encoder->base.base.id,
6386                         drm_get_encoder_name(&encoder->base),
6387                         mode->base.id, mode->name);
6388                 encoder->mode_set(encoder);
6389         }
6390
6391         return 0;
6392 }
6393
6394 static bool intel_eld_uptodate(struct drm_connector *connector,
6395                                int reg_eldv, uint32_t bits_eldv,
6396                                int reg_elda, uint32_t bits_elda,
6397                                int reg_edid)
6398 {
6399         struct drm_i915_private *dev_priv = connector->dev->dev_private;
6400         uint8_t *eld = connector->eld;
6401         uint32_t i;
6402
6403         i = I915_READ(reg_eldv);
6404         i &= bits_eldv;
6405
6406         if (!eld[0])
6407                 return !i;
6408
6409         if (!i)
6410                 return false;
6411
6412         i = I915_READ(reg_elda);
6413         i &= ~bits_elda;
6414         I915_WRITE(reg_elda, i);
6415
6416         for (i = 0; i < eld[2]; i++)
6417                 if (I915_READ(reg_edid) != *((uint32_t *)eld + i))
6418                         return false;
6419
6420         return true;
6421 }
6422
6423 static void g4x_write_eld(struct drm_connector *connector,
6424                           struct drm_crtc *crtc)
6425 {
6426         struct drm_i915_private *dev_priv = connector->dev->dev_private;
6427         uint8_t *eld = connector->eld;
6428         uint32_t eldv;
6429         uint32_t len;
6430         uint32_t i;
6431
6432         i = I915_READ(G4X_AUD_VID_DID);
6433
6434         if (i == INTEL_AUDIO_DEVBLC || i == INTEL_AUDIO_DEVCL)
6435                 eldv = G4X_ELDV_DEVCL_DEVBLC;
6436         else
6437                 eldv = G4X_ELDV_DEVCTG;
6438
6439         if (intel_eld_uptodate(connector,
6440                                G4X_AUD_CNTL_ST, eldv,
6441                                G4X_AUD_CNTL_ST, G4X_ELD_ADDR,
6442                                G4X_HDMIW_HDMIEDID))
6443                 return;
6444
6445         i = I915_READ(G4X_AUD_CNTL_ST);
6446         i &= ~(eldv | G4X_ELD_ADDR);
6447         len = (i >> 9) & 0x1f;          /* ELD buffer size */
6448         I915_WRITE(G4X_AUD_CNTL_ST, i);
6449
6450         if (!eld[0])
6451                 return;
6452
6453         len = min_t(uint8_t, eld[2], len);
6454         DRM_DEBUG_DRIVER("ELD size %d\n", len);
6455         for (i = 0; i < len; i++)
6456                 I915_WRITE(G4X_HDMIW_HDMIEDID, *((uint32_t *)eld + i));
6457
6458         i = I915_READ(G4X_AUD_CNTL_ST);
6459         i |= eldv;
6460         I915_WRITE(G4X_AUD_CNTL_ST, i);
6461 }
6462
6463 static void haswell_write_eld(struct drm_connector *connector,
6464                                      struct drm_crtc *crtc)
6465 {
6466         struct drm_i915_private *dev_priv = connector->dev->dev_private;
6467         uint8_t *eld = connector->eld;
6468         struct drm_device *dev = crtc->dev;
6469         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6470         uint32_t eldv;
6471         uint32_t i;
6472         int len;
6473         int pipe = to_intel_crtc(crtc)->pipe;
6474         int tmp;
6475
6476         int hdmiw_hdmiedid = HSW_AUD_EDID_DATA(pipe);
6477         int aud_cntl_st = HSW_AUD_DIP_ELD_CTRL(pipe);
6478         int aud_config = HSW_AUD_CFG(pipe);
6479         int aud_cntrl_st2 = HSW_AUD_PIN_ELD_CP_VLD;
6480
6481
6482         DRM_DEBUG_DRIVER("HDMI: Haswell Audio initialize....\n");
6483
6484         /* Audio output enable */
6485         DRM_DEBUG_DRIVER("HDMI audio: enable codec\n");
6486         tmp = I915_READ(aud_cntrl_st2);
6487         tmp |= (AUDIO_OUTPUT_ENABLE_A << (pipe * 4));
6488         I915_WRITE(aud_cntrl_st2, tmp);
6489
6490         /* Wait for 1 vertical blank */
6491         intel_wait_for_vblank(dev, pipe);
6492
6493         /* Set ELD valid state */
6494         tmp = I915_READ(aud_cntrl_st2);
6495         DRM_DEBUG_DRIVER("HDMI audio: pin eld vld status=0x%8x\n", tmp);
6496         tmp |= (AUDIO_ELD_VALID_A << (pipe * 4));
6497         I915_WRITE(aud_cntrl_st2, tmp);
6498         tmp = I915_READ(aud_cntrl_st2);
6499         DRM_DEBUG_DRIVER("HDMI audio: eld vld status=0x%8x\n", tmp);
6500
6501         /* Enable HDMI mode */
6502         tmp = I915_READ(aud_config);
6503         DRM_DEBUG_DRIVER("HDMI audio: audio conf: 0x%8x\n", tmp);
6504         /* clear N_programing_enable and N_value_index */
6505         tmp &= ~(AUD_CONFIG_N_VALUE_INDEX | AUD_CONFIG_N_PROG_ENABLE);
6506         I915_WRITE(aud_config, tmp);
6507
6508         DRM_DEBUG_DRIVER("ELD on pipe %c\n", pipe_name(pipe));
6509
6510         eldv = AUDIO_ELD_VALID_A << (pipe * 4);
6511         intel_crtc->eld_vld = true;
6512
6513         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
6514                 DRM_DEBUG_DRIVER("ELD: DisplayPort detected\n");
6515                 eld[5] |= (1 << 2);     /* Conn_Type, 0x1 = DisplayPort */
6516                 I915_WRITE(aud_config, AUD_CONFIG_N_VALUE_INDEX); /* 0x1 = DP */
6517         } else
6518                 I915_WRITE(aud_config, 0);
6519
6520         if (intel_eld_uptodate(connector,
6521                                aud_cntrl_st2, eldv,
6522                                aud_cntl_st, IBX_ELD_ADDRESS,
6523                                hdmiw_hdmiedid))
6524                 return;
6525
6526         i = I915_READ(aud_cntrl_st2);
6527         i &= ~eldv;
6528         I915_WRITE(aud_cntrl_st2, i);
6529
6530         if (!eld[0])
6531                 return;
6532
6533         i = I915_READ(aud_cntl_st);
6534         i &= ~IBX_ELD_ADDRESS;
6535         I915_WRITE(aud_cntl_st, i);
6536         i = (i >> 29) & DIP_PORT_SEL_MASK;              /* DIP_Port_Select, 0x1 = PortB */
6537         DRM_DEBUG_DRIVER("port num:%d\n", i);
6538
6539         len = min_t(uint8_t, eld[2], 21);       /* 84 bytes of hw ELD buffer */
6540         DRM_DEBUG_DRIVER("ELD size %d\n", len);
6541         for (i = 0; i < len; i++)
6542                 I915_WRITE(hdmiw_hdmiedid, *((uint32_t *)eld + i));
6543
6544         i = I915_READ(aud_cntrl_st2);
6545         i |= eldv;
6546         I915_WRITE(aud_cntrl_st2, i);
6547
6548 }
6549
6550 static void ironlake_write_eld(struct drm_connector *connector,
6551                                      struct drm_crtc *crtc)
6552 {
6553         struct drm_i915_private *dev_priv = connector->dev->dev_private;
6554         uint8_t *eld = connector->eld;
6555         uint32_t eldv;
6556         uint32_t i;
6557         int len;
6558         int hdmiw_hdmiedid;
6559         int aud_config;
6560         int aud_cntl_st;
6561         int aud_cntrl_st2;
6562         int pipe = to_intel_crtc(crtc)->pipe;
6563
6564         if (HAS_PCH_IBX(connector->dev)) {
6565                 hdmiw_hdmiedid = IBX_HDMIW_HDMIEDID(pipe);
6566                 aud_config = IBX_AUD_CFG(pipe);
6567                 aud_cntl_st = IBX_AUD_CNTL_ST(pipe);
6568                 aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
6569         } else {
6570                 hdmiw_hdmiedid = CPT_HDMIW_HDMIEDID(pipe);
6571                 aud_config = CPT_AUD_CFG(pipe);
6572                 aud_cntl_st = CPT_AUD_CNTL_ST(pipe);
6573                 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
6574         }
6575
6576         DRM_DEBUG_DRIVER("ELD on pipe %c\n", pipe_name(pipe));
6577
6578         i = I915_READ(aud_cntl_st);
6579         i = (i >> 29) & DIP_PORT_SEL_MASK;              /* DIP_Port_Select, 0x1 = PortB */
6580         if (!i) {
6581                 DRM_DEBUG_DRIVER("Audio directed to unknown port\n");
6582                 /* operate blindly on all ports */
6583                 eldv = IBX_ELD_VALIDB;
6584                 eldv |= IBX_ELD_VALIDB << 4;
6585                 eldv |= IBX_ELD_VALIDB << 8;
6586         } else {
6587                 DRM_DEBUG_DRIVER("ELD on port %c\n", port_name(i));
6588                 eldv = IBX_ELD_VALIDB << ((i - 1) * 4);
6589         }
6590
6591         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
6592                 DRM_DEBUG_DRIVER("ELD: DisplayPort detected\n");
6593                 eld[5] |= (1 << 2);     /* Conn_Type, 0x1 = DisplayPort */
6594                 I915_WRITE(aud_config, AUD_CONFIG_N_VALUE_INDEX); /* 0x1 = DP */
6595         } else
6596                 I915_WRITE(aud_config, 0);
6597
6598         if (intel_eld_uptodate(connector,
6599                                aud_cntrl_st2, eldv,
6600                                aud_cntl_st, IBX_ELD_ADDRESS,
6601                                hdmiw_hdmiedid))
6602                 return;
6603
6604         i = I915_READ(aud_cntrl_st2);
6605         i &= ~eldv;
6606         I915_WRITE(aud_cntrl_st2, i);
6607
6608         if (!eld[0])
6609                 return;
6610
6611         i = I915_READ(aud_cntl_st);
6612         i &= ~IBX_ELD_ADDRESS;
6613         I915_WRITE(aud_cntl_st, i);
6614
6615         len = min_t(uint8_t, eld[2], 21);       /* 84 bytes of hw ELD buffer */
6616         DRM_DEBUG_DRIVER("ELD size %d\n", len);
6617         for (i = 0; i < len; i++)
6618                 I915_WRITE(hdmiw_hdmiedid, *((uint32_t *)eld + i));
6619
6620         i = I915_READ(aud_cntrl_st2);
6621         i |= eldv;
6622         I915_WRITE(aud_cntrl_st2, i);
6623 }
6624
6625 void intel_write_eld(struct drm_encoder *encoder,
6626                      struct drm_display_mode *mode)
6627 {
6628         struct drm_crtc *crtc = encoder->crtc;
6629         struct drm_connector *connector;
6630         struct drm_device *dev = encoder->dev;
6631         struct drm_i915_private *dev_priv = dev->dev_private;
6632
6633         connector = drm_select_eld(encoder, mode);
6634         if (!connector)
6635                 return;
6636
6637         DRM_DEBUG_DRIVER("ELD on [CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
6638                          connector->base.id,
6639                          drm_get_connector_name(connector),
6640                          connector->encoder->base.id,
6641                          drm_get_encoder_name(connector->encoder));
6642
6643         connector->eld[6] = drm_av_sync_delay(connector, mode) / 2;
6644
6645         if (dev_priv->display.write_eld)
6646                 dev_priv->display.write_eld(connector, crtc);
6647 }
6648
6649 /** Loads the palette/gamma unit for the CRTC with the prepared values */
6650 void intel_crtc_load_lut(struct drm_crtc *crtc)
6651 {
6652         struct drm_device *dev = crtc->dev;
6653         struct drm_i915_private *dev_priv = dev->dev_private;
6654         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6655         enum pipe pipe = intel_crtc->pipe;
6656         int palreg = PALETTE(pipe);
6657         int i;
6658         bool reenable_ips = false;
6659
6660         /* The clocks have to be on to load the palette. */
6661         if (!crtc->enabled || !intel_crtc->active)
6662                 return;
6663
6664         if (!HAS_PCH_SPLIT(dev_priv->dev))
6665                 assert_pll_enabled(dev_priv, pipe);
6666
6667         /* use legacy palette for Ironlake */
6668         if (HAS_PCH_SPLIT(dev))
6669                 palreg = LGC_PALETTE(pipe);
6670
6671         /* Workaround : Do not read or write the pipe palette/gamma data while
6672          * GAMMA_MODE is configured for split gamma and IPS_CTL has IPS enabled.
6673          */
6674         if (intel_crtc->config.ips_enabled &&
6675             ((I915_READ(GAMMA_MODE(pipe)) & GAMMA_MODE_MODE_MASK) ==
6676              GAMMA_MODE_MODE_SPLIT)) {
6677                 hsw_disable_ips(intel_crtc);
6678                 reenable_ips = true;
6679         }
6680
6681         for (i = 0; i < 256; i++) {
6682                 I915_WRITE(palreg + 4 * i,
6683                            (intel_crtc->lut_r[i] << 16) |
6684                            (intel_crtc->lut_g[i] << 8) |
6685                            intel_crtc->lut_b[i]);
6686         }
6687
6688         if (reenable_ips)
6689                 hsw_enable_ips(intel_crtc);
6690 }
6691
6692 static void i845_update_cursor(struct drm_crtc *crtc, u32 base)
6693 {
6694         struct drm_device *dev = crtc->dev;
6695         struct drm_i915_private *dev_priv = dev->dev_private;
6696         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6697         bool visible = base != 0;
6698         u32 cntl;
6699
6700         if (intel_crtc->cursor_visible == visible)
6701                 return;
6702
6703         cntl = I915_READ(_CURACNTR);
6704         if (visible) {
6705                 /* On these chipsets we can only modify the base whilst
6706                  * the cursor is disabled.
6707                  */
6708                 I915_WRITE(_CURABASE, base);
6709
6710                 cntl &= ~(CURSOR_FORMAT_MASK);
6711                 /* XXX width must be 64, stride 256 => 0x00 << 28 */
6712                 cntl |= CURSOR_ENABLE |
6713                         CURSOR_GAMMA_ENABLE |
6714                         CURSOR_FORMAT_ARGB;
6715         } else
6716                 cntl &= ~(CURSOR_ENABLE | CURSOR_GAMMA_ENABLE);
6717         I915_WRITE(_CURACNTR, cntl);
6718
6719         intel_crtc->cursor_visible = visible;
6720 }
6721
6722 static void i9xx_update_cursor(struct drm_crtc *crtc, u32 base)
6723 {
6724         struct drm_device *dev = crtc->dev;
6725         struct drm_i915_private *dev_priv = dev->dev_private;
6726         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6727         int pipe = intel_crtc->pipe;
6728         bool visible = base != 0;
6729
6730         if (intel_crtc->cursor_visible != visible) {
6731                 uint32_t cntl = I915_READ(CURCNTR(pipe));
6732                 if (base) {
6733                         cntl &= ~(CURSOR_MODE | MCURSOR_PIPE_SELECT);
6734                         cntl |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
6735                         cntl |= pipe << 28; /* Connect to correct pipe */
6736                 } else {
6737                         cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
6738                         cntl |= CURSOR_MODE_DISABLE;
6739                 }
6740                 I915_WRITE(CURCNTR(pipe), cntl);
6741
6742                 intel_crtc->cursor_visible = visible;
6743         }
6744         /* and commit changes on next vblank */
6745         I915_WRITE(CURBASE(pipe), base);
6746 }
6747
6748 static void ivb_update_cursor(struct drm_crtc *crtc, u32 base)
6749 {
6750         struct drm_device *dev = crtc->dev;
6751         struct drm_i915_private *dev_priv = dev->dev_private;
6752         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6753         int pipe = intel_crtc->pipe;
6754         bool visible = base != 0;
6755
6756         if (intel_crtc->cursor_visible != visible) {
6757                 uint32_t cntl = I915_READ(CURCNTR_IVB(pipe));
6758                 if (base) {
6759                         cntl &= ~CURSOR_MODE;
6760                         cntl |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
6761                 } else {
6762                         cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
6763                         cntl |= CURSOR_MODE_DISABLE;
6764                 }
6765                 if (IS_HASWELL(dev))
6766                         cntl |= CURSOR_PIPE_CSC_ENABLE;
6767                 I915_WRITE(CURCNTR_IVB(pipe), cntl);
6768
6769                 intel_crtc->cursor_visible = visible;
6770         }
6771         /* and commit changes on next vblank */
6772         I915_WRITE(CURBASE_IVB(pipe), base);
6773 }
6774
6775 /* If no-part of the cursor is visible on the framebuffer, then the GPU may hang... */
6776 static void intel_crtc_update_cursor(struct drm_crtc *crtc,
6777                                      bool on)
6778 {
6779         struct drm_device *dev = crtc->dev;
6780         struct drm_i915_private *dev_priv = dev->dev_private;
6781         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6782         int pipe = intel_crtc->pipe;
6783         int x = intel_crtc->cursor_x;
6784         int y = intel_crtc->cursor_y;
6785         u32 base, pos;
6786         bool visible;
6787
6788         pos = 0;
6789
6790         if (on && crtc->enabled && crtc->fb) {
6791                 base = intel_crtc->cursor_addr;
6792                 if (x > (int) crtc->fb->width)
6793                         base = 0;
6794
6795                 if (y > (int) crtc->fb->height)
6796                         base = 0;
6797         } else
6798                 base = 0;
6799
6800         if (x < 0) {
6801                 if (x + intel_crtc->cursor_width < 0)
6802                         base = 0;
6803
6804                 pos |= CURSOR_POS_SIGN << CURSOR_X_SHIFT;
6805                 x = -x;
6806         }
6807         pos |= x << CURSOR_X_SHIFT;
6808
6809         if (y < 0) {
6810                 if (y + intel_crtc->cursor_height < 0)
6811                         base = 0;
6812
6813                 pos |= CURSOR_POS_SIGN << CURSOR_Y_SHIFT;
6814                 y = -y;
6815         }
6816         pos |= y << CURSOR_Y_SHIFT;
6817
6818         visible = base != 0;
6819         if (!visible && !intel_crtc->cursor_visible)
6820                 return;
6821
6822         if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
6823                 I915_WRITE(CURPOS_IVB(pipe), pos);
6824                 ivb_update_cursor(crtc, base);
6825         } else {
6826                 I915_WRITE(CURPOS(pipe), pos);
6827                 if (IS_845G(dev) || IS_I865G(dev))
6828                         i845_update_cursor(crtc, base);
6829                 else
6830                         i9xx_update_cursor(crtc, base);
6831         }
6832 }
6833
6834 static int intel_crtc_cursor_set(struct drm_crtc *crtc,
6835                                  struct drm_file *file,
6836                                  uint32_t handle,
6837                                  uint32_t width, uint32_t height)
6838 {
6839         struct drm_device *dev = crtc->dev;
6840         struct drm_i915_private *dev_priv = dev->dev_private;
6841         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6842         struct drm_i915_gem_object *obj;
6843         uint32_t addr;
6844         int ret;
6845
6846         /* if we want to turn off the cursor ignore width and height */
6847         if (!handle) {
6848                 DRM_DEBUG_KMS("cursor off\n");
6849                 addr = 0;
6850                 obj = NULL;
6851                 mutex_lock(&dev->struct_mutex);
6852                 goto finish;
6853         }
6854
6855         /* Currently we only support 64x64 cursors */
6856         if (width != 64 || height != 64) {
6857                 DRM_ERROR("we currently only support 64x64 cursors\n");
6858                 return -EINVAL;
6859         }
6860
6861         obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle));
6862         if (&obj->base == NULL)
6863                 return -ENOENT;
6864
6865         if (obj->base.size < width * height * 4) {
6866                 DRM_ERROR("buffer is to small\n");
6867                 ret = -ENOMEM;
6868                 goto fail;
6869         }
6870
6871         /* we only need to pin inside GTT if cursor is non-phy */
6872         mutex_lock(&dev->struct_mutex);
6873         if (!dev_priv->info->cursor_needs_physical) {
6874                 unsigned alignment;
6875
6876                 if (obj->tiling_mode) {
6877                         DRM_ERROR("cursor cannot be tiled\n");
6878                         ret = -EINVAL;
6879                         goto fail_locked;
6880                 }
6881
6882                 /* Note that the w/a also requires 2 PTE of padding following
6883                  * the bo. We currently fill all unused PTE with the shadow
6884                  * page and so we should always have valid PTE following the
6885                  * cursor preventing the VT-d warning.
6886                  */
6887                 alignment = 0;
6888                 if (need_vtd_wa(dev))
6889                         alignment = 64*1024;
6890
6891                 ret = i915_gem_object_pin_to_display_plane(obj, alignment, NULL);
6892                 if (ret) {
6893                         DRM_ERROR("failed to move cursor bo into the GTT\n");
6894                         goto fail_locked;
6895                 }
6896
6897                 ret = i915_gem_object_put_fence(obj);
6898                 if (ret) {
6899                         DRM_ERROR("failed to release fence for cursor");
6900                         goto fail_unpin;
6901                 }
6902
6903                 addr = i915_gem_obj_ggtt_offset(obj);
6904         } else {
6905                 int align = IS_I830(dev) ? 16 * 1024 : 256;
6906                 ret = i915_gem_attach_phys_object(dev, obj,
6907                                                   (intel_crtc->pipe == 0) ? I915_GEM_PHYS_CURSOR_0 : I915_GEM_PHYS_CURSOR_1,
6908                                                   align);
6909                 if (ret) {
6910                         DRM_ERROR("failed to attach phys object\n");
6911                         goto fail_locked;
6912                 }
6913                 addr = obj->phys_obj->handle->busaddr;
6914         }
6915
6916         if (IS_GEN2(dev))
6917                 I915_WRITE(CURSIZE, (height << 12) | width);
6918
6919  finish:
6920         if (intel_crtc->cursor_bo) {
6921                 if (dev_priv->info->cursor_needs_physical) {
6922                         if (intel_crtc->cursor_bo != obj)
6923                                 i915_gem_detach_phys_object(dev, intel_crtc->cursor_bo);
6924                 } else
6925                         i915_gem_object_unpin_from_display_plane(intel_crtc->cursor_bo);
6926                 drm_gem_object_unreference(&intel_crtc->cursor_bo->base);
6927         }
6928
6929         mutex_unlock(&dev->struct_mutex);
6930
6931         intel_crtc->cursor_addr = addr;
6932         intel_crtc->cursor_bo = obj;
6933         intel_crtc->cursor_width = width;
6934         intel_crtc->cursor_height = height;
6935
6936         intel_crtc_update_cursor(crtc, intel_crtc->cursor_bo != NULL);
6937
6938         return 0;
6939 fail_unpin:
6940         i915_gem_object_unpin_from_display_plane(obj);
6941 fail_locked:
6942         mutex_unlock(&dev->struct_mutex);
6943 fail:
6944         drm_gem_object_unreference_unlocked(&obj->base);
6945         return ret;
6946 }
6947
6948 static int intel_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
6949 {
6950         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6951
6952         intel_crtc->cursor_x = x;
6953         intel_crtc->cursor_y = y;
6954
6955         intel_crtc_update_cursor(crtc, intel_crtc->cursor_bo != NULL);
6956
6957         return 0;
6958 }
6959
6960 /** Sets the color ramps on behalf of RandR */
6961 void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
6962                                  u16 blue, int regno)
6963 {
6964         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6965
6966         intel_crtc->lut_r[regno] = red >> 8;
6967         intel_crtc->lut_g[regno] = green >> 8;
6968         intel_crtc->lut_b[regno] = blue >> 8;
6969 }
6970
6971 void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
6972                              u16 *blue, int regno)
6973 {
6974         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6975
6976         *red = intel_crtc->lut_r[regno] << 8;
6977         *green = intel_crtc->lut_g[regno] << 8;
6978         *blue = intel_crtc->lut_b[regno] << 8;
6979 }
6980
6981 static void intel_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
6982                                  u16 *blue, uint32_t start, uint32_t size)
6983 {
6984         int end = (start + size > 256) ? 256 : start + size, i;
6985         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6986
6987         for (i = start; i < end; i++) {
6988                 intel_crtc->lut_r[i] = red[i] >> 8;
6989                 intel_crtc->lut_g[i] = green[i] >> 8;
6990                 intel_crtc->lut_b[i] = blue[i] >> 8;
6991         }
6992
6993         intel_crtc_load_lut(crtc);
6994 }
6995
6996 /* VESA 640x480x72Hz mode to set on the pipe */
6997 static struct drm_display_mode load_detect_mode = {
6998         DRM_MODE("640x480", DRM_MODE_TYPE_DEFAULT, 31500, 640, 664,
6999                  704, 832, 0, 480, 489, 491, 520, 0, DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC),
7000 };
7001
7002 static struct drm_framebuffer *
7003 intel_framebuffer_create(struct drm_device *dev,
7004                          struct drm_mode_fb_cmd2 *mode_cmd,
7005                          struct drm_i915_gem_object *obj)
7006 {
7007         struct intel_framebuffer *intel_fb;
7008         int ret;
7009
7010         intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
7011         if (!intel_fb) {
7012                 drm_gem_object_unreference_unlocked(&obj->base);
7013                 return ERR_PTR(-ENOMEM);
7014         }
7015
7016         ret = intel_framebuffer_init(dev, intel_fb, mode_cmd, obj);
7017         if (ret) {
7018                 drm_gem_object_unreference_unlocked(&obj->base);
7019                 kfree(intel_fb);
7020                 return ERR_PTR(ret);
7021         }
7022
7023         return &intel_fb->base;
7024 }
7025
7026 static u32
7027 intel_framebuffer_pitch_for_width(int width, int bpp)
7028 {
7029         u32 pitch = DIV_ROUND_UP(width * bpp, 8);
7030         return ALIGN(pitch, 64);
7031 }
7032
7033 static u32
7034 intel_framebuffer_size_for_mode(struct drm_display_mode *mode, int bpp)
7035 {
7036         u32 pitch = intel_framebuffer_pitch_for_width(mode->hdisplay, bpp);
7037         return ALIGN(pitch * mode->vdisplay, PAGE_SIZE);
7038 }
7039
7040 static struct drm_framebuffer *
7041 intel_framebuffer_create_for_mode(struct drm_device *dev,
7042                                   struct drm_display_mode *mode,
7043                                   int depth, int bpp)
7044 {
7045         struct drm_i915_gem_object *obj;
7046         struct drm_mode_fb_cmd2 mode_cmd = { 0 };
7047
7048         obj = i915_gem_alloc_object(dev,
7049                                     intel_framebuffer_size_for_mode(mode, bpp));
7050         if (obj == NULL)
7051                 return ERR_PTR(-ENOMEM);
7052
7053         mode_cmd.width = mode->hdisplay;
7054         mode_cmd.height = mode->vdisplay;
7055         mode_cmd.pitches[0] = intel_framebuffer_pitch_for_width(mode_cmd.width,
7056                                                                 bpp);
7057         mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
7058
7059         return intel_framebuffer_create(dev, &mode_cmd, obj);
7060 }
7061
7062 static struct drm_framebuffer *
7063 mode_fits_in_fbdev(struct drm_device *dev,
7064                    struct drm_display_mode *mode)
7065 {
7066         struct drm_i915_private *dev_priv = dev->dev_private;
7067         struct drm_i915_gem_object *obj;
7068         struct drm_framebuffer *fb;
7069
7070         if (dev_priv->fbdev == NULL)
7071                 return NULL;
7072
7073         obj = dev_priv->fbdev->ifb.obj;
7074         if (obj == NULL)
7075                 return NULL;
7076
7077         fb = &dev_priv->fbdev->ifb.base;
7078         if (fb->pitches[0] < intel_framebuffer_pitch_for_width(mode->hdisplay,
7079                                                                fb->bits_per_pixel))
7080                 return NULL;
7081
7082         if (obj->base.size < mode->vdisplay * fb->pitches[0])
7083                 return NULL;
7084
7085         return fb;
7086 }
7087
7088 bool intel_get_load_detect_pipe(struct drm_connector *connector,
7089                                 struct drm_display_mode *mode,
7090                                 struct intel_load_detect_pipe *old)
7091 {
7092         struct intel_crtc *intel_crtc;
7093         struct intel_encoder *intel_encoder =
7094                 intel_attached_encoder(connector);
7095         struct drm_crtc *possible_crtc;
7096         struct drm_encoder *encoder = &intel_encoder->base;
7097         struct drm_crtc *crtc = NULL;
7098         struct drm_device *dev = encoder->dev;
7099         struct drm_framebuffer *fb;
7100         int i = -1;
7101
7102         DRM_DEBUG_KMS("[CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
7103                       connector->base.id, drm_get_connector_name(connector),
7104                       encoder->base.id, drm_get_encoder_name(encoder));
7105
7106         /*
7107          * Algorithm gets a little messy:
7108          *
7109          *   - if the connector already has an assigned crtc, use it (but make
7110          *     sure it's on first)
7111          *
7112          *   - try to find the first unused crtc that can drive this connector,
7113          *     and use that if we find one
7114          */
7115
7116         /* See if we already have a CRTC for this connector */
7117         if (encoder->crtc) {
7118                 crtc = encoder->crtc;
7119
7120                 mutex_lock(&crtc->mutex);
7121
7122                 old->dpms_mode = connector->dpms;
7123                 old->load_detect_temp = false;
7124
7125                 /* Make sure the crtc and connector are running */
7126                 if (connector->dpms != DRM_MODE_DPMS_ON)
7127                         connector->funcs->dpms(connector, DRM_MODE_DPMS_ON);
7128
7129                 return true;
7130         }
7131
7132         /* Find an unused one (if possible) */
7133         list_for_each_entry(possible_crtc, &dev->mode_config.crtc_list, head) {
7134                 i++;
7135                 if (!(encoder->possible_crtcs & (1 << i)))
7136                         continue;
7137                 if (!possible_crtc->enabled) {
7138                         crtc = possible_crtc;
7139                         break;
7140                 }
7141         }
7142
7143         /*
7144          * If we didn't find an unused CRTC, don't use any.
7145          */
7146         if (!crtc) {
7147                 DRM_DEBUG_KMS("no pipe available for load-detect\n");
7148                 return false;
7149         }
7150
7151         mutex_lock(&crtc->mutex);
7152         intel_encoder->new_crtc = to_intel_crtc(crtc);
7153         to_intel_connector(connector)->new_encoder = intel_encoder;
7154
7155         intel_crtc = to_intel_crtc(crtc);
7156         old->dpms_mode = connector->dpms;
7157         old->load_detect_temp = true;
7158         old->release_fb = NULL;
7159
7160         if (!mode)
7161                 mode = &load_detect_mode;
7162
7163         /* We need a framebuffer large enough to accommodate all accesses
7164          * that the plane may generate whilst we perform load detection.
7165          * We can not rely on the fbcon either being present (we get called
7166          * during its initialisation to detect all boot displays, or it may
7167          * not even exist) or that it is large enough to satisfy the
7168          * requested mode.
7169          */
7170         fb = mode_fits_in_fbdev(dev, mode);
7171         if (fb == NULL) {
7172                 DRM_DEBUG_KMS("creating tmp fb for load-detection\n");
7173                 fb = intel_framebuffer_create_for_mode(dev, mode, 24, 32);
7174                 old->release_fb = fb;
7175         } else
7176                 DRM_DEBUG_KMS("reusing fbdev for load-detection framebuffer\n");
7177         if (IS_ERR(fb)) {
7178                 DRM_DEBUG_KMS("failed to allocate framebuffer for load-detection\n");
7179                 mutex_unlock(&crtc->mutex);
7180                 return false;
7181         }
7182
7183         if (intel_set_mode(crtc, mode, 0, 0, fb)) {
7184                 DRM_DEBUG_KMS("failed to set mode on load-detect pipe\n");
7185                 if (old->release_fb)
7186                         old->release_fb->funcs->destroy(old->release_fb);
7187                 mutex_unlock(&crtc->mutex);
7188                 return false;
7189         }
7190
7191         /* let the connector get through one full cycle before testing */
7192         intel_wait_for_vblank(dev, intel_crtc->pipe);
7193         return true;
7194 }
7195
7196 void intel_release_load_detect_pipe(struct drm_connector *connector,
7197                                     struct intel_load_detect_pipe *old)
7198 {
7199         struct intel_encoder *intel_encoder =
7200                 intel_attached_encoder(connector);
7201         struct drm_encoder *encoder = &intel_encoder->base;
7202         struct drm_crtc *crtc = encoder->crtc;
7203
7204         DRM_DEBUG_KMS("[CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
7205                       connector->base.id, drm_get_connector_name(connector),
7206                       encoder->base.id, drm_get_encoder_name(encoder));
7207
7208         if (old->load_detect_temp) {
7209                 to_intel_connector(connector)->new_encoder = NULL;
7210                 intel_encoder->new_crtc = NULL;
7211                 intel_set_mode(crtc, NULL, 0, 0, NULL);
7212
7213                 if (old->release_fb) {
7214                         drm_framebuffer_unregister_private(old->release_fb);
7215                         drm_framebuffer_unreference(old->release_fb);
7216                 }
7217
7218                 mutex_unlock(&crtc->mutex);
7219                 return;
7220         }
7221
7222         /* Switch crtc and encoder back off if necessary */
7223         if (old->dpms_mode != DRM_MODE_DPMS_ON)
7224                 connector->funcs->dpms(connector, old->dpms_mode);
7225
7226         mutex_unlock(&crtc->mutex);
7227 }
7228
7229 /* Returns the clock of the currently programmed mode of the given pipe. */
7230 static void i9xx_crtc_clock_get(struct intel_crtc *crtc,
7231                                 struct intel_crtc_config *pipe_config)
7232 {
7233         struct drm_device *dev = crtc->base.dev;
7234         struct drm_i915_private *dev_priv = dev->dev_private;
7235         int pipe = pipe_config->cpu_transcoder;
7236         u32 dpll = I915_READ(DPLL(pipe));
7237         u32 fp;
7238         intel_clock_t clock;
7239
7240         if ((dpll & DISPLAY_RATE_SELECT_FPA1) == 0)
7241                 fp = I915_READ(FP0(pipe));
7242         else
7243                 fp = I915_READ(FP1(pipe));
7244
7245         clock.m1 = (fp & FP_M1_DIV_MASK) >> FP_M1_DIV_SHIFT;
7246         if (IS_PINEVIEW(dev)) {
7247                 clock.n = ffs((fp & FP_N_PINEVIEW_DIV_MASK) >> FP_N_DIV_SHIFT) - 1;
7248                 clock.m2 = (fp & FP_M2_PINEVIEW_DIV_MASK) >> FP_M2_DIV_SHIFT;
7249         } else {
7250                 clock.n = (fp & FP_N_DIV_MASK) >> FP_N_DIV_SHIFT;
7251                 clock.m2 = (fp & FP_M2_DIV_MASK) >> FP_M2_DIV_SHIFT;
7252         }
7253
7254         if (!IS_GEN2(dev)) {
7255                 if (IS_PINEVIEW(dev))
7256                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_PINEVIEW) >>
7257                                 DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW);
7258                 else
7259                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK) >>
7260                                DPLL_FPA01_P1_POST_DIV_SHIFT);
7261
7262                 switch (dpll & DPLL_MODE_MASK) {
7263                 case DPLLB_MODE_DAC_SERIAL:
7264                         clock.p2 = dpll & DPLL_DAC_SERIAL_P2_CLOCK_DIV_5 ?
7265                                 5 : 10;
7266                         break;
7267                 case DPLLB_MODE_LVDS:
7268                         clock.p2 = dpll & DPLLB_LVDS_P2_CLOCK_DIV_7 ?
7269                                 7 : 14;
7270                         break;
7271                 default:
7272                         DRM_DEBUG_KMS("Unknown DPLL mode %08x in programmed "
7273                                   "mode\n", (int)(dpll & DPLL_MODE_MASK));
7274                         pipe_config->adjusted_mode.clock = 0;
7275                         return;
7276                 }
7277
7278                 if (IS_PINEVIEW(dev))
7279                         pineview_clock(96000, &clock);
7280                 else
7281                         i9xx_clock(96000, &clock);
7282         } else {
7283                 bool is_lvds = (pipe == 1) && (I915_READ(LVDS) & LVDS_PORT_EN);
7284
7285                 if (is_lvds) {
7286                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830_LVDS) >>
7287                                        DPLL_FPA01_P1_POST_DIV_SHIFT);
7288                         clock.p2 = 14;
7289
7290                         if ((dpll & PLL_REF_INPUT_MASK) ==
7291                             PLLB_REF_INPUT_SPREADSPECTRUMIN) {
7292                                 /* XXX: might not be 66MHz */
7293                                 i9xx_clock(66000, &clock);
7294                         } else
7295                                 i9xx_clock(48000, &clock);
7296                 } else {
7297                         if (dpll & PLL_P1_DIVIDE_BY_TWO)
7298                                 clock.p1 = 2;
7299                         else {
7300                                 clock.p1 = ((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830) >>
7301                                             DPLL_FPA01_P1_POST_DIV_SHIFT) + 2;
7302                         }
7303                         if (dpll & PLL_P2_DIVIDE_BY_4)
7304                                 clock.p2 = 4;
7305                         else
7306                                 clock.p2 = 2;
7307
7308                         i9xx_clock(48000, &clock);
7309                 }
7310         }
7311
7312         pipe_config->adjusted_mode.clock = clock.dot *
7313                 pipe_config->pixel_multiplier;
7314 }
7315
7316 static void ironlake_crtc_clock_get(struct intel_crtc *crtc,
7317                                     struct intel_crtc_config *pipe_config)
7318 {
7319         struct drm_device *dev = crtc->base.dev;
7320         struct drm_i915_private *dev_priv = dev->dev_private;
7321         enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
7322         int link_freq, repeat;
7323         u64 clock;
7324         u32 link_m, link_n;
7325
7326         repeat = pipe_config->pixel_multiplier;
7327
7328         /*
7329          * The calculation for the data clock is:
7330          * pixel_clock = ((m/n)*(link_clock * nr_lanes * repeat))/bpp
7331          * But we want to avoid losing precison if possible, so:
7332          * pixel_clock = ((m * link_clock * nr_lanes * repeat)/(n*bpp))
7333          *
7334          * and the link clock is simpler:
7335          * link_clock = (m * link_clock * repeat) / n
7336          */
7337
7338         /*
7339          * We need to get the FDI or DP link clock here to derive
7340          * the M/N dividers.
7341          *
7342          * For FDI, we read it from the BIOS or use a fixed 2.7GHz.
7343          * For DP, it's either 1.62GHz or 2.7GHz.
7344          * We do our calculations in 10*MHz since we don't need much precison.
7345          */
7346         if (pipe_config->has_pch_encoder)
7347                 link_freq = intel_fdi_link_freq(dev) * 10000;
7348         else
7349                 link_freq = pipe_config->port_clock;
7350
7351         link_m = I915_READ(PIPE_LINK_M1(cpu_transcoder));
7352         link_n = I915_READ(PIPE_LINK_N1(cpu_transcoder));
7353
7354         if (!link_m || !link_n)
7355                 return;
7356
7357         clock = ((u64)link_m * (u64)link_freq * (u64)repeat);
7358         do_div(clock, link_n);
7359
7360         pipe_config->adjusted_mode.clock = clock;
7361 }
7362
7363 /** Returns the currently programmed mode of the given pipe. */
7364 struct drm_display_mode *intel_crtc_mode_get(struct drm_device *dev,
7365                                              struct drm_crtc *crtc)
7366 {
7367         struct drm_i915_private *dev_priv = dev->dev_private;
7368         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7369         enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
7370         struct drm_display_mode *mode;
7371         struct intel_crtc_config pipe_config;
7372         int htot = I915_READ(HTOTAL(cpu_transcoder));
7373         int hsync = I915_READ(HSYNC(cpu_transcoder));
7374         int vtot = I915_READ(VTOTAL(cpu_transcoder));
7375         int vsync = I915_READ(VSYNC(cpu_transcoder));
7376
7377         mode = kzalloc(sizeof(*mode), GFP_KERNEL);
7378         if (!mode)
7379                 return NULL;
7380
7381         /*
7382          * Construct a pipe_config sufficient for getting the clock info
7383          * back out of crtc_clock_get.
7384          *
7385          * Note, if LVDS ever uses a non-1 pixel multiplier, we'll need
7386          * to use a real value here instead.
7387          */
7388         pipe_config.cpu_transcoder = (enum transcoder) intel_crtc->pipe;
7389         pipe_config.pixel_multiplier = 1;
7390         i9xx_crtc_clock_get(intel_crtc, &pipe_config);
7391
7392         mode->clock = pipe_config.adjusted_mode.clock;
7393         mode->hdisplay = (htot & 0xffff) + 1;
7394         mode->htotal = ((htot & 0xffff0000) >> 16) + 1;
7395         mode->hsync_start = (hsync & 0xffff) + 1;
7396         mode->hsync_end = ((hsync & 0xffff0000) >> 16) + 1;
7397         mode->vdisplay = (vtot & 0xffff) + 1;
7398         mode->vtotal = ((vtot & 0xffff0000) >> 16) + 1;
7399         mode->vsync_start = (vsync & 0xffff) + 1;
7400         mode->vsync_end = ((vsync & 0xffff0000) >> 16) + 1;
7401
7402         drm_mode_set_name(mode);
7403
7404         return mode;
7405 }
7406
7407 static void intel_increase_pllclock(struct drm_crtc *crtc)
7408 {
7409         struct drm_device *dev = crtc->dev;
7410         drm_i915_private_t *dev_priv = dev->dev_private;
7411         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7412         int pipe = intel_crtc->pipe;
7413         int dpll_reg = DPLL(pipe);
7414         int dpll;
7415
7416         if (HAS_PCH_SPLIT(dev))
7417                 return;
7418
7419         if (!dev_priv->lvds_downclock_avail)
7420                 return;
7421
7422         dpll = I915_READ(dpll_reg);
7423         if (!HAS_PIPE_CXSR(dev) && (dpll & DISPLAY_RATE_SELECT_FPA1)) {
7424                 DRM_DEBUG_DRIVER("upclocking LVDS\n");
7425
7426                 assert_panel_unlocked(dev_priv, pipe);
7427
7428                 dpll &= ~DISPLAY_RATE_SELECT_FPA1;
7429                 I915_WRITE(dpll_reg, dpll);
7430                 intel_wait_for_vblank(dev, pipe);
7431
7432                 dpll = I915_READ(dpll_reg);
7433                 if (dpll & DISPLAY_RATE_SELECT_FPA1)
7434                         DRM_DEBUG_DRIVER("failed to upclock LVDS!\n");
7435         }
7436 }
7437
7438 static void intel_decrease_pllclock(struct drm_crtc *crtc)
7439 {
7440         struct drm_device *dev = crtc->dev;
7441         drm_i915_private_t *dev_priv = dev->dev_private;
7442         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7443
7444         if (HAS_PCH_SPLIT(dev))
7445                 return;
7446
7447         if (!dev_priv->lvds_downclock_avail)
7448                 return;
7449
7450         /*
7451          * Since this is called by a timer, we should never get here in
7452          * the manual case.
7453          */
7454         if (!HAS_PIPE_CXSR(dev) && intel_crtc->lowfreq_avail) {
7455                 int pipe = intel_crtc->pipe;
7456                 int dpll_reg = DPLL(pipe);
7457                 int dpll;
7458
7459                 DRM_DEBUG_DRIVER("downclocking LVDS\n");
7460
7461                 assert_panel_unlocked(dev_priv, pipe);
7462
7463                 dpll = I915_READ(dpll_reg);
7464                 dpll |= DISPLAY_RATE_SELECT_FPA1;
7465                 I915_WRITE(dpll_reg, dpll);
7466                 intel_wait_for_vblank(dev, pipe);
7467                 dpll = I915_READ(dpll_reg);
7468                 if (!(dpll & DISPLAY_RATE_SELECT_FPA1))
7469                         DRM_DEBUG_DRIVER("failed to downclock LVDS!\n");
7470         }
7471
7472 }
7473
7474 void intel_mark_busy(struct drm_device *dev)
7475 {
7476         struct drm_i915_private *dev_priv = dev->dev_private;
7477
7478         hsw_package_c8_gpu_busy(dev_priv);
7479         i915_update_gfx_val(dev_priv);
7480 }
7481
7482 void intel_mark_idle(struct drm_device *dev)
7483 {
7484         struct drm_i915_private *dev_priv = dev->dev_private;
7485         struct drm_crtc *crtc;
7486
7487         hsw_package_c8_gpu_idle(dev_priv);
7488
7489         if (!i915_powersave)
7490                 return;
7491
7492         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
7493                 if (!crtc->fb)
7494                         continue;
7495
7496                 intel_decrease_pllclock(crtc);
7497         }
7498 }
7499
7500 void intel_mark_fb_busy(struct drm_i915_gem_object *obj,
7501                         struct intel_ring_buffer *ring)
7502 {
7503         struct drm_device *dev = obj->base.dev;
7504         struct drm_crtc *crtc;
7505
7506         if (!i915_powersave)
7507                 return;
7508
7509         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
7510                 if (!crtc->fb)
7511                         continue;
7512
7513                 if (to_intel_framebuffer(crtc->fb)->obj != obj)
7514                         continue;
7515
7516                 intel_increase_pllclock(crtc);
7517                 if (ring && intel_fbc_enabled(dev))
7518                         ring->fbc_dirty = true;
7519         }
7520 }
7521
7522 static void intel_crtc_destroy(struct drm_crtc *crtc)
7523 {
7524         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7525         struct drm_device *dev = crtc->dev;
7526         struct intel_unpin_work *work;
7527         unsigned long flags;
7528
7529         spin_lock_irqsave(&dev->event_lock, flags);
7530         work = intel_crtc->unpin_work;
7531         intel_crtc->unpin_work = NULL;
7532         spin_unlock_irqrestore(&dev->event_lock, flags);
7533
7534         if (work) {
7535                 cancel_work_sync(&work->work);
7536                 kfree(work);
7537         }
7538
7539         intel_crtc_cursor_set(crtc, NULL, 0, 0, 0);
7540
7541         drm_crtc_cleanup(crtc);
7542
7543         kfree(intel_crtc);
7544 }
7545
7546 static void intel_unpin_work_fn(struct work_struct *__work)
7547 {
7548         struct intel_unpin_work *work =
7549                 container_of(__work, struct intel_unpin_work, work);
7550         struct drm_device *dev = work->crtc->dev;
7551
7552         mutex_lock(&dev->struct_mutex);
7553         intel_unpin_fb_obj(work->old_fb_obj);
7554         drm_gem_object_unreference(&work->pending_flip_obj->base);
7555         drm_gem_object_unreference(&work->old_fb_obj->base);
7556
7557         intel_update_fbc(dev);
7558         mutex_unlock(&dev->struct_mutex);
7559
7560         BUG_ON(atomic_read(&to_intel_crtc(work->crtc)->unpin_work_count) == 0);
7561         atomic_dec(&to_intel_crtc(work->crtc)->unpin_work_count);
7562
7563         kfree(work);
7564 }
7565
7566 static void do_intel_finish_page_flip(struct drm_device *dev,
7567                                       struct drm_crtc *crtc)
7568 {
7569         drm_i915_private_t *dev_priv = dev->dev_private;
7570         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7571         struct intel_unpin_work *work;
7572         unsigned long flags;
7573
7574         /* Ignore early vblank irqs */
7575         if (intel_crtc == NULL)
7576                 return;
7577
7578         spin_lock_irqsave(&dev->event_lock, flags);
7579         work = intel_crtc->unpin_work;
7580
7581         /* Ensure we don't miss a work->pending update ... */
7582         smp_rmb();
7583
7584         if (work == NULL || atomic_read(&work->pending) < INTEL_FLIP_COMPLETE) {
7585                 spin_unlock_irqrestore(&dev->event_lock, flags);
7586                 return;
7587         }
7588
7589         /* and that the unpin work is consistent wrt ->pending. */
7590         smp_rmb();
7591
7592         intel_crtc->unpin_work = NULL;
7593
7594         if (work->event)
7595                 drm_send_vblank_event(dev, intel_crtc->pipe, work->event);
7596
7597         drm_vblank_put(dev, intel_crtc->pipe);
7598
7599         spin_unlock_irqrestore(&dev->event_lock, flags);
7600
7601         wake_up_all(&dev_priv->pending_flip_queue);
7602
7603         queue_work(dev_priv->wq, &work->work);
7604
7605         trace_i915_flip_complete(intel_crtc->plane, work->pending_flip_obj);
7606 }
7607
7608 void intel_finish_page_flip(struct drm_device *dev, int pipe)
7609 {
7610         drm_i915_private_t *dev_priv = dev->dev_private;
7611         struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
7612
7613         do_intel_finish_page_flip(dev, crtc);
7614 }
7615
7616 void intel_finish_page_flip_plane(struct drm_device *dev, int plane)
7617 {
7618         drm_i915_private_t *dev_priv = dev->dev_private;
7619         struct drm_crtc *crtc = dev_priv->plane_to_crtc_mapping[plane];
7620
7621         do_intel_finish_page_flip(dev, crtc);
7622 }
7623
7624 void intel_prepare_page_flip(struct drm_device *dev, int plane)
7625 {
7626         drm_i915_private_t *dev_priv = dev->dev_private;
7627         struct intel_crtc *intel_crtc =
7628                 to_intel_crtc(dev_priv->plane_to_crtc_mapping[plane]);
7629         unsigned long flags;
7630
7631         /* NB: An MMIO update of the plane base pointer will also
7632          * generate a page-flip completion irq, i.e. every modeset
7633          * is also accompanied by a spurious intel_prepare_page_flip().
7634          */
7635         spin_lock_irqsave(&dev->event_lock, flags);
7636         if (intel_crtc->unpin_work)
7637                 atomic_inc_not_zero(&intel_crtc->unpin_work->pending);
7638         spin_unlock_irqrestore(&dev->event_lock, flags);
7639 }
7640
7641 inline static void intel_mark_page_flip_active(struct intel_crtc *intel_crtc)
7642 {
7643         /* Ensure that the work item is consistent when activating it ... */
7644         smp_wmb();
7645         atomic_set(&intel_crtc->unpin_work->pending, INTEL_FLIP_PENDING);
7646         /* and that it is marked active as soon as the irq could fire. */
7647         smp_wmb();
7648 }
7649
7650 static int intel_gen2_queue_flip(struct drm_device *dev,
7651                                  struct drm_crtc *crtc,
7652                                  struct drm_framebuffer *fb,
7653                                  struct drm_i915_gem_object *obj,
7654                                  uint32_t flags)
7655 {
7656         struct drm_i915_private *dev_priv = dev->dev_private;
7657         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7658         u32 flip_mask;
7659         struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
7660         int ret;
7661
7662         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7663         if (ret)
7664                 goto err;
7665
7666         ret = intel_ring_begin(ring, 6);
7667         if (ret)
7668                 goto err_unpin;
7669
7670         /* Can't queue multiple flips, so wait for the previous
7671          * one to finish before executing the next.
7672          */
7673         if (intel_crtc->plane)
7674                 flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
7675         else
7676                 flip_mask = MI_WAIT_FOR_PLANE_A_FLIP;
7677         intel_ring_emit(ring, MI_WAIT_FOR_EVENT | flip_mask);
7678         intel_ring_emit(ring, MI_NOOP);
7679         intel_ring_emit(ring, MI_DISPLAY_FLIP |
7680                         MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7681         intel_ring_emit(ring, fb->pitches[0]);
7682         intel_ring_emit(ring, i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset);
7683         intel_ring_emit(ring, 0); /* aux display base address, unused */
7684
7685         intel_mark_page_flip_active(intel_crtc);
7686         intel_ring_advance(ring);
7687         return 0;
7688
7689 err_unpin:
7690         intel_unpin_fb_obj(obj);
7691 err:
7692         return ret;
7693 }
7694
7695 static int intel_gen3_queue_flip(struct drm_device *dev,
7696                                  struct drm_crtc *crtc,
7697                                  struct drm_framebuffer *fb,
7698                                  struct drm_i915_gem_object *obj,
7699                                  uint32_t flags)
7700 {
7701         struct drm_i915_private *dev_priv = dev->dev_private;
7702         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7703         u32 flip_mask;
7704         struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
7705         int ret;
7706
7707         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7708         if (ret)
7709                 goto err;
7710
7711         ret = intel_ring_begin(ring, 6);
7712         if (ret)
7713                 goto err_unpin;
7714
7715         if (intel_crtc->plane)
7716                 flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
7717         else
7718                 flip_mask = MI_WAIT_FOR_PLANE_A_FLIP;
7719         intel_ring_emit(ring, MI_WAIT_FOR_EVENT | flip_mask);
7720         intel_ring_emit(ring, MI_NOOP);
7721         intel_ring_emit(ring, MI_DISPLAY_FLIP_I915 |
7722                         MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7723         intel_ring_emit(ring, fb->pitches[0]);
7724         intel_ring_emit(ring, i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset);
7725         intel_ring_emit(ring, MI_NOOP);
7726
7727         intel_mark_page_flip_active(intel_crtc);
7728         intel_ring_advance(ring);
7729         return 0;
7730
7731 err_unpin:
7732         intel_unpin_fb_obj(obj);
7733 err:
7734         return ret;
7735 }
7736
7737 static int intel_gen4_queue_flip(struct drm_device *dev,
7738                                  struct drm_crtc *crtc,
7739                                  struct drm_framebuffer *fb,
7740                                  struct drm_i915_gem_object *obj,
7741                                  uint32_t flags)
7742 {
7743         struct drm_i915_private *dev_priv = dev->dev_private;
7744         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7745         uint32_t pf, pipesrc;
7746         struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
7747         int ret;
7748
7749         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7750         if (ret)
7751                 goto err;
7752
7753         ret = intel_ring_begin(ring, 4);
7754         if (ret)
7755                 goto err_unpin;
7756
7757         /* i965+ uses the linear or tiled offsets from the
7758          * Display Registers (which do not change across a page-flip)
7759          * so we need only reprogram the base address.
7760          */
7761         intel_ring_emit(ring, MI_DISPLAY_FLIP |
7762                         MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7763         intel_ring_emit(ring, fb->pitches[0]);
7764         intel_ring_emit(ring,
7765                         (i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset) |
7766                         obj->tiling_mode);
7767
7768         /* XXX Enabling the panel-fitter across page-flip is so far
7769          * untested on non-native modes, so ignore it for now.
7770          * pf = I915_READ(pipe == 0 ? PFA_CTL_1 : PFB_CTL_1) & PF_ENABLE;
7771          */
7772         pf = 0;
7773         pipesrc = I915_READ(PIPESRC(intel_crtc->pipe)) & 0x0fff0fff;
7774         intel_ring_emit(ring, pf | pipesrc);
7775
7776         intel_mark_page_flip_active(intel_crtc);
7777         intel_ring_advance(ring);
7778         return 0;
7779
7780 err_unpin:
7781         intel_unpin_fb_obj(obj);
7782 err:
7783         return ret;
7784 }
7785
7786 static int intel_gen6_queue_flip(struct drm_device *dev,
7787                                  struct drm_crtc *crtc,
7788                                  struct drm_framebuffer *fb,
7789                                  struct drm_i915_gem_object *obj,
7790                                  uint32_t flags)
7791 {
7792         struct drm_i915_private *dev_priv = dev->dev_private;
7793         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7794         struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
7795         uint32_t pf, pipesrc;
7796         int ret;
7797
7798         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7799         if (ret)
7800                 goto err;
7801
7802         ret = intel_ring_begin(ring, 4);
7803         if (ret)
7804                 goto err_unpin;
7805
7806         intel_ring_emit(ring, MI_DISPLAY_FLIP |
7807                         MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7808         intel_ring_emit(ring, fb->pitches[0] | obj->tiling_mode);
7809         intel_ring_emit(ring, i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset);
7810
7811         /* Contrary to the suggestions in the documentation,
7812          * "Enable Panel Fitter" does not seem to be required when page
7813          * flipping with a non-native mode, and worse causes a normal
7814          * modeset to fail.
7815          * pf = I915_READ(PF_CTL(intel_crtc->pipe)) & PF_ENABLE;
7816          */
7817         pf = 0;
7818         pipesrc = I915_READ(PIPESRC(intel_crtc->pipe)) & 0x0fff0fff;
7819         intel_ring_emit(ring, pf | pipesrc);
7820
7821         intel_mark_page_flip_active(intel_crtc);
7822         intel_ring_advance(ring);
7823         return 0;
7824
7825 err_unpin:
7826         intel_unpin_fb_obj(obj);
7827 err:
7828         return ret;
7829 }
7830
7831 static int intel_gen7_queue_flip(struct drm_device *dev,
7832                                  struct drm_crtc *crtc,
7833                                  struct drm_framebuffer *fb,
7834                                  struct drm_i915_gem_object *obj,
7835                                  uint32_t flags)
7836 {
7837         struct drm_i915_private *dev_priv = dev->dev_private;
7838         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7839         struct intel_ring_buffer *ring;
7840         uint32_t plane_bit = 0;
7841         int len, ret;
7842
7843         ring = obj->ring;
7844         if (ring == NULL || ring->id != RCS)
7845                 ring = &dev_priv->ring[BCS];
7846
7847         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7848         if (ret)
7849                 goto err;
7850
7851         switch(intel_crtc->plane) {
7852         case PLANE_A:
7853                 plane_bit = MI_DISPLAY_FLIP_IVB_PLANE_A;
7854                 break;
7855         case PLANE_B:
7856                 plane_bit = MI_DISPLAY_FLIP_IVB_PLANE_B;
7857                 break;
7858         case PLANE_C:
7859                 plane_bit = MI_DISPLAY_FLIP_IVB_PLANE_C;
7860                 break;
7861         default:
7862                 WARN_ONCE(1, "unknown plane in flip command\n");
7863                 ret = -ENODEV;
7864                 goto err_unpin;
7865         }
7866
7867         len = 4;
7868         if (ring->id == RCS)
7869                 len += 6;
7870
7871         ret = intel_ring_begin(ring, len);
7872         if (ret)
7873                 goto err_unpin;
7874
7875         /* Unmask the flip-done completion message. Note that the bspec says that
7876          * we should do this for both the BCS and RCS, and that we must not unmask
7877          * more than one flip event at any time (or ensure that one flip message
7878          * can be sent by waiting for flip-done prior to queueing new flips).
7879          * Experimentation says that BCS works despite DERRMR masking all
7880          * flip-done completion events and that unmasking all planes at once
7881          * for the RCS also doesn't appear to drop events. Setting the DERRMR
7882          * to zero does lead to lockups within MI_DISPLAY_FLIP.
7883          */
7884         if (ring->id == RCS) {
7885                 intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1));
7886                 intel_ring_emit(ring, DERRMR);
7887                 intel_ring_emit(ring, ~(DERRMR_PIPEA_PRI_FLIP_DONE |
7888                                         DERRMR_PIPEB_PRI_FLIP_DONE |
7889                                         DERRMR_PIPEC_PRI_FLIP_DONE));
7890                 intel_ring_emit(ring, MI_STORE_REGISTER_MEM(1));
7891                 intel_ring_emit(ring, DERRMR);
7892                 intel_ring_emit(ring, ring->scratch.gtt_offset + 256);
7893         }
7894
7895         intel_ring_emit(ring, MI_DISPLAY_FLIP_I915 | plane_bit);
7896         intel_ring_emit(ring, (fb->pitches[0] | obj->tiling_mode));
7897         intel_ring_emit(ring, i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset);
7898         intel_ring_emit(ring, (MI_NOOP));
7899
7900         intel_mark_page_flip_active(intel_crtc);
7901         intel_ring_advance(ring);
7902         return 0;
7903
7904 err_unpin:
7905         intel_unpin_fb_obj(obj);
7906 err:
7907         return ret;
7908 }
7909
7910 static int intel_default_queue_flip(struct drm_device *dev,
7911                                     struct drm_crtc *crtc,
7912                                     struct drm_framebuffer *fb,
7913                                     struct drm_i915_gem_object *obj,
7914                                     uint32_t flags)
7915 {
7916         return -ENODEV;
7917 }
7918
7919 static int intel_crtc_page_flip(struct drm_crtc *crtc,
7920                                 struct drm_framebuffer *fb,
7921                                 struct drm_pending_vblank_event *event,
7922                                 uint32_t page_flip_flags)
7923 {
7924         struct drm_device *dev = crtc->dev;
7925         struct drm_i915_private *dev_priv = dev->dev_private;
7926         struct drm_framebuffer *old_fb = crtc->fb;
7927         struct drm_i915_gem_object *obj = to_intel_framebuffer(fb)->obj;
7928         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7929         struct intel_unpin_work *work;
7930         unsigned long flags;
7931         int ret;
7932
7933         /* Can't change pixel format via MI display flips. */
7934         if (fb->pixel_format != crtc->fb->pixel_format)
7935                 return -EINVAL;
7936
7937         /*
7938          * TILEOFF/LINOFF registers can't be changed via MI display flips.
7939          * Note that pitch changes could also affect these register.
7940          */
7941         if (INTEL_INFO(dev)->gen > 3 &&
7942             (fb->offsets[0] != crtc->fb->offsets[0] ||
7943              fb->pitches[0] != crtc->fb->pitches[0]))
7944                 return -EINVAL;
7945
7946         work = kzalloc(sizeof *work, GFP_KERNEL);
7947         if (work == NULL)
7948                 return -ENOMEM;
7949
7950         work->event = event;
7951         work->crtc = crtc;
7952         work->old_fb_obj = to_intel_framebuffer(old_fb)->obj;
7953         INIT_WORK(&work->work, intel_unpin_work_fn);
7954
7955         ret = drm_vblank_get(dev, intel_crtc->pipe);
7956         if (ret)
7957                 goto free_work;
7958
7959         /* We borrow the event spin lock for protecting unpin_work */
7960         spin_lock_irqsave(&dev->event_lock, flags);
7961         if (intel_crtc->unpin_work) {
7962                 spin_unlock_irqrestore(&dev->event_lock, flags);
7963                 kfree(work);
7964                 drm_vblank_put(dev, intel_crtc->pipe);
7965
7966                 DRM_DEBUG_DRIVER("flip queue: crtc already busy\n");
7967                 return -EBUSY;
7968         }
7969         intel_crtc->unpin_work = work;
7970         spin_unlock_irqrestore(&dev->event_lock, flags);
7971
7972         if (atomic_read(&intel_crtc->unpin_work_count) >= 2)
7973                 flush_workqueue(dev_priv->wq);
7974
7975         ret = i915_mutex_lock_interruptible(dev);
7976         if (ret)
7977                 goto cleanup;
7978
7979         /* Reference the objects for the scheduled work. */
7980         drm_gem_object_reference(&work->old_fb_obj->base);
7981         drm_gem_object_reference(&obj->base);
7982
7983         crtc->fb = fb;
7984
7985         work->pending_flip_obj = obj;
7986
7987         work->enable_stall_check = true;
7988
7989         atomic_inc(&intel_crtc->unpin_work_count);
7990         intel_crtc->reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
7991
7992         ret = dev_priv->display.queue_flip(dev, crtc, fb, obj, page_flip_flags);
7993         if (ret)
7994                 goto cleanup_pending;
7995
7996         intel_disable_fbc(dev);
7997         intel_mark_fb_busy(obj, NULL);
7998         mutex_unlock(&dev->struct_mutex);
7999
8000         trace_i915_flip_request(intel_crtc->plane, obj);
8001
8002         return 0;
8003
8004 cleanup_pending:
8005         atomic_dec(&intel_crtc->unpin_work_count);
8006         crtc->fb = old_fb;
8007         drm_gem_object_unreference(&work->old_fb_obj->base);
8008         drm_gem_object_unreference(&obj->base);
8009         mutex_unlock(&dev->struct_mutex);
8010
8011 cleanup:
8012         spin_lock_irqsave(&dev->event_lock, flags);
8013         intel_crtc->unpin_work = NULL;
8014         spin_unlock_irqrestore(&dev->event_lock, flags);
8015
8016         drm_vblank_put(dev, intel_crtc->pipe);
8017 free_work:
8018         kfree(work);
8019
8020         return ret;
8021 }
8022
8023 static struct drm_crtc_helper_funcs intel_helper_funcs = {
8024         .mode_set_base_atomic = intel_pipe_set_base_atomic,
8025         .load_lut = intel_crtc_load_lut,
8026 };
8027
8028 static bool intel_encoder_crtc_ok(struct drm_encoder *encoder,
8029                                   struct drm_crtc *crtc)
8030 {
8031         struct drm_device *dev;
8032         struct drm_crtc *tmp;
8033         int crtc_mask = 1;
8034
8035         WARN(!crtc, "checking null crtc?\n");
8036
8037         dev = crtc->dev;
8038
8039         list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
8040                 if (tmp == crtc)
8041                         break;
8042                 crtc_mask <<= 1;
8043         }
8044
8045         if (encoder->possible_crtcs & crtc_mask)
8046                 return true;
8047         return false;
8048 }
8049
8050 /**
8051  * intel_modeset_update_staged_output_state
8052  *
8053  * Updates the staged output configuration state, e.g. after we've read out the
8054  * current hw state.
8055  */
8056 static void intel_modeset_update_staged_output_state(struct drm_device *dev)
8057 {
8058         struct intel_encoder *encoder;
8059         struct intel_connector *connector;
8060
8061         list_for_each_entry(connector, &dev->mode_config.connector_list,
8062                             base.head) {
8063                 connector->new_encoder =
8064                         to_intel_encoder(connector->base.encoder);
8065         }
8066
8067         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
8068                             base.head) {
8069                 encoder->new_crtc =
8070                         to_intel_crtc(encoder->base.crtc);
8071         }
8072 }
8073
8074 /**
8075  * intel_modeset_commit_output_state
8076  *
8077  * This function copies the stage display pipe configuration to the real one.
8078  */
8079 static void intel_modeset_commit_output_state(struct drm_device *dev)
8080 {
8081         struct intel_encoder *encoder;
8082         struct intel_connector *connector;
8083
8084         list_for_each_entry(connector, &dev->mode_config.connector_list,
8085                             base.head) {
8086                 connector->base.encoder = &connector->new_encoder->base;
8087         }
8088
8089         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
8090                             base.head) {
8091                 encoder->base.crtc = &encoder->new_crtc->base;
8092         }
8093 }
8094
8095 static void
8096 connected_sink_compute_bpp(struct intel_connector * connector,
8097                            struct intel_crtc_config *pipe_config)
8098 {
8099         int bpp = pipe_config->pipe_bpp;
8100
8101         DRM_DEBUG_KMS("[CONNECTOR:%d:%s] checking for sink bpp constrains\n",
8102                 connector->base.base.id,
8103                 drm_get_connector_name(&connector->base));
8104
8105         /* Don't use an invalid EDID bpc value */
8106         if (connector->base.display_info.bpc &&
8107             connector->base.display_info.bpc * 3 < bpp) {
8108                 DRM_DEBUG_KMS("clamping display bpp (was %d) to EDID reported max of %d\n",
8109                               bpp, connector->base.display_info.bpc*3);
8110                 pipe_config->pipe_bpp = connector->base.display_info.bpc*3;
8111         }
8112
8113         /* Clamp bpp to 8 on screens without EDID 1.4 */
8114         if (connector->base.display_info.bpc == 0 && bpp > 24) {
8115                 DRM_DEBUG_KMS("clamping display bpp (was %d) to default limit of 24\n",
8116                               bpp);
8117                 pipe_config->pipe_bpp = 24;
8118         }
8119 }
8120
8121 static int
8122 compute_baseline_pipe_bpp(struct intel_crtc *crtc,
8123                           struct drm_framebuffer *fb,
8124                           struct intel_crtc_config *pipe_config)
8125 {
8126         struct drm_device *dev = crtc->base.dev;
8127         struct intel_connector *connector;
8128         int bpp;
8129
8130         switch (fb->pixel_format) {
8131         case DRM_FORMAT_C8:
8132                 bpp = 8*3; /* since we go through a colormap */
8133                 break;
8134         case DRM_FORMAT_XRGB1555:
8135         case DRM_FORMAT_ARGB1555:
8136                 /* checked in intel_framebuffer_init already */
8137                 if (WARN_ON(INTEL_INFO(dev)->gen > 3))
8138                         return -EINVAL;
8139         case DRM_FORMAT_RGB565:
8140                 bpp = 6*3; /* min is 18bpp */
8141                 break;
8142         case DRM_FORMAT_XBGR8888:
8143         case DRM_FORMAT_ABGR8888:
8144                 /* checked in intel_framebuffer_init already */
8145                 if (WARN_ON(INTEL_INFO(dev)->gen < 4))
8146                         return -EINVAL;
8147         case DRM_FORMAT_XRGB8888:
8148         case DRM_FORMAT_ARGB8888:
8149                 bpp = 8*3;
8150                 break;
8151         case DRM_FORMAT_XRGB2101010:
8152         case DRM_FORMAT_ARGB2101010:
8153         case DRM_FORMAT_XBGR2101010:
8154         case DRM_FORMAT_ABGR2101010:
8155                 /* checked in intel_framebuffer_init already */
8156                 if (WARN_ON(INTEL_INFO(dev)->gen < 4))
8157                         return -EINVAL;
8158                 bpp = 10*3;
8159                 break;
8160         /* TODO: gen4+ supports 16 bpc floating point, too. */
8161         default:
8162                 DRM_DEBUG_KMS("unsupported depth\n");
8163                 return -EINVAL;
8164         }
8165
8166         pipe_config->pipe_bpp = bpp;
8167
8168         /* Clamp display bpp to EDID value */
8169         list_for_each_entry(connector, &dev->mode_config.connector_list,
8170                             base.head) {
8171                 if (!connector->new_encoder ||
8172                     connector->new_encoder->new_crtc != crtc)
8173                         continue;
8174
8175                 connected_sink_compute_bpp(connector, pipe_config);
8176         }
8177
8178         return bpp;
8179 }
8180
8181 static void intel_dump_pipe_config(struct intel_crtc *crtc,
8182                                    struct intel_crtc_config *pipe_config,
8183                                    const char *context)
8184 {
8185         DRM_DEBUG_KMS("[CRTC:%d]%s config for pipe %c\n", crtc->base.base.id,
8186                       context, pipe_name(crtc->pipe));
8187
8188         DRM_DEBUG_KMS("cpu_transcoder: %c\n", transcoder_name(pipe_config->cpu_transcoder));
8189         DRM_DEBUG_KMS("pipe bpp: %i, dithering: %i\n",
8190                       pipe_config->pipe_bpp, pipe_config->dither);
8191         DRM_DEBUG_KMS("fdi/pch: %i, lanes: %i, gmch_m: %u, gmch_n: %u, link_m: %u, link_n: %u, tu: %u\n",
8192                       pipe_config->has_pch_encoder,
8193                       pipe_config->fdi_lanes,
8194                       pipe_config->fdi_m_n.gmch_m, pipe_config->fdi_m_n.gmch_n,
8195                       pipe_config->fdi_m_n.link_m, pipe_config->fdi_m_n.link_n,
8196                       pipe_config->fdi_m_n.tu);
8197         DRM_DEBUG_KMS("requested mode:\n");
8198         drm_mode_debug_printmodeline(&pipe_config->requested_mode);
8199         DRM_DEBUG_KMS("adjusted mode:\n");
8200         drm_mode_debug_printmodeline(&pipe_config->adjusted_mode);
8201         DRM_DEBUG_KMS("gmch pfit: control: 0x%08x, ratios: 0x%08x, lvds border: 0x%08x\n",
8202                       pipe_config->gmch_pfit.control,
8203                       pipe_config->gmch_pfit.pgm_ratios,
8204                       pipe_config->gmch_pfit.lvds_border_bits);
8205         DRM_DEBUG_KMS("pch pfit: pos: 0x%08x, size: 0x%08x\n",
8206                       pipe_config->pch_pfit.pos,
8207                       pipe_config->pch_pfit.size);
8208         DRM_DEBUG_KMS("ips: %i\n", pipe_config->ips_enabled);
8209 }
8210
8211 static bool check_encoder_cloning(struct drm_crtc *crtc)
8212 {
8213         int num_encoders = 0;
8214         bool uncloneable_encoders = false;
8215         struct intel_encoder *encoder;
8216
8217         list_for_each_entry(encoder, &crtc->dev->mode_config.encoder_list,
8218                             base.head) {
8219                 if (&encoder->new_crtc->base != crtc)
8220                         continue;
8221
8222                 num_encoders++;
8223                 if (!encoder->cloneable)
8224                         uncloneable_encoders = true;
8225         }
8226
8227         return !(num_encoders > 1 && uncloneable_encoders);
8228 }
8229
8230 static struct intel_crtc_config *
8231 intel_modeset_pipe_config(struct drm_crtc *crtc,
8232                           struct drm_framebuffer *fb,
8233                           struct drm_display_mode *mode)
8234 {
8235         struct drm_device *dev = crtc->dev;
8236         struct intel_encoder *encoder;
8237         struct intel_crtc_config *pipe_config;
8238         int plane_bpp, ret = -EINVAL;
8239         bool retry = true;
8240
8241         if (!check_encoder_cloning(crtc)) {
8242                 DRM_DEBUG_KMS("rejecting invalid cloning configuration\n");
8243                 return ERR_PTR(-EINVAL);
8244         }
8245
8246         pipe_config = kzalloc(sizeof(*pipe_config), GFP_KERNEL);
8247         if (!pipe_config)
8248                 return ERR_PTR(-ENOMEM);
8249
8250         drm_mode_copy(&pipe_config->adjusted_mode, mode);
8251         drm_mode_copy(&pipe_config->requested_mode, mode);
8252         pipe_config->cpu_transcoder =
8253                 (enum transcoder) to_intel_crtc(crtc)->pipe;
8254         pipe_config->shared_dpll = DPLL_ID_PRIVATE;
8255
8256         /*
8257          * Sanitize sync polarity flags based on requested ones. If neither
8258          * positive or negative polarity is requested, treat this as meaning
8259          * negative polarity.
8260          */
8261         if (!(pipe_config->adjusted_mode.flags &
8262               (DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NHSYNC)))
8263                 pipe_config->adjusted_mode.flags |= DRM_MODE_FLAG_NHSYNC;
8264
8265         if (!(pipe_config->adjusted_mode.flags &
8266               (DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_NVSYNC)))
8267                 pipe_config->adjusted_mode.flags |= DRM_MODE_FLAG_NVSYNC;
8268
8269         /* Compute a starting value for pipe_config->pipe_bpp taking the source
8270          * plane pixel format and any sink constraints into account. Returns the
8271          * source plane bpp so that dithering can be selected on mismatches
8272          * after encoders and crtc also have had their say. */
8273         plane_bpp = compute_baseline_pipe_bpp(to_intel_crtc(crtc),
8274                                               fb, pipe_config);
8275         if (plane_bpp < 0)
8276                 goto fail;
8277
8278 encoder_retry:
8279         /* Ensure the port clock defaults are reset when retrying. */
8280         pipe_config->port_clock = 0;
8281         pipe_config->pixel_multiplier = 1;
8282
8283         /* Fill in default crtc timings, allow encoders to overwrite them. */
8284         drm_mode_set_crtcinfo(&pipe_config->adjusted_mode, 0);
8285
8286         /* Pass our mode to the connectors and the CRTC to give them a chance to
8287          * adjust it according to limitations or connector properties, and also
8288          * a chance to reject the mode entirely.
8289          */
8290         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
8291                             base.head) {
8292
8293                 if (&encoder->new_crtc->base != crtc)
8294                         continue;
8295
8296                 if (!(encoder->compute_config(encoder, pipe_config))) {
8297                         DRM_DEBUG_KMS("Encoder config failure\n");
8298                         goto fail;
8299                 }
8300         }
8301
8302         /* Set default port clock if not overwritten by the encoder. Needs to be
8303          * done afterwards in case the encoder adjusts the mode. */
8304         if (!pipe_config->port_clock)
8305                 pipe_config->port_clock = pipe_config->adjusted_mode.clock;
8306
8307         ret = intel_crtc_compute_config(to_intel_crtc(crtc), pipe_config);
8308         if (ret < 0) {
8309                 DRM_DEBUG_KMS("CRTC fixup failed\n");
8310                 goto fail;
8311         }
8312
8313         if (ret == RETRY) {
8314                 if (WARN(!retry, "loop in pipe configuration computation\n")) {
8315                         ret = -EINVAL;
8316                         goto fail;
8317                 }
8318
8319                 DRM_DEBUG_KMS("CRTC bw constrained, retrying\n");
8320                 retry = false;
8321                 goto encoder_retry;
8322         }
8323
8324         pipe_config->dither = pipe_config->pipe_bpp != plane_bpp;
8325         DRM_DEBUG_KMS("plane bpp: %i, pipe bpp: %i, dithering: %i\n",
8326                       plane_bpp, pipe_config->pipe_bpp, pipe_config->dither);
8327
8328         return pipe_config;
8329 fail:
8330         kfree(pipe_config);
8331         return ERR_PTR(ret);
8332 }
8333
8334 /* Computes which crtcs are affected and sets the relevant bits in the mask. For
8335  * simplicity we use the crtc's pipe number (because it's easier to obtain). */
8336 static void
8337 intel_modeset_affected_pipes(struct drm_crtc *crtc, unsigned *modeset_pipes,
8338                              unsigned *prepare_pipes, unsigned *disable_pipes)
8339 {
8340         struct intel_crtc *intel_crtc;
8341         struct drm_device *dev = crtc->dev;
8342         struct intel_encoder *encoder;
8343         struct intel_connector *connector;
8344         struct drm_crtc *tmp_crtc;
8345
8346         *disable_pipes = *modeset_pipes = *prepare_pipes = 0;
8347
8348         /* Check which crtcs have changed outputs connected to them, these need
8349          * to be part of the prepare_pipes mask. We don't (yet) support global
8350          * modeset across multiple crtcs, so modeset_pipes will only have one
8351          * bit set at most. */
8352         list_for_each_entry(connector, &dev->mode_config.connector_list,
8353                             base.head) {
8354                 if (connector->base.encoder == &connector->new_encoder->base)
8355                         continue;
8356
8357                 if (connector->base.encoder) {
8358                         tmp_crtc = connector->base.encoder->crtc;
8359
8360                         *prepare_pipes |= 1 << to_intel_crtc(tmp_crtc)->pipe;
8361                 }
8362
8363                 if (connector->new_encoder)
8364                         *prepare_pipes |=
8365                                 1 << connector->new_encoder->new_crtc->pipe;
8366         }
8367
8368         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
8369                             base.head) {
8370                 if (encoder->base.crtc == &encoder->new_crtc->base)
8371                         continue;
8372
8373                 if (encoder->base.crtc) {
8374                         tmp_crtc = encoder->base.crtc;
8375
8376                         *prepare_pipes |= 1 << to_intel_crtc(tmp_crtc)->pipe;
8377                 }
8378
8379                 if (encoder->new_crtc)
8380                         *prepare_pipes |= 1 << encoder->new_crtc->pipe;
8381         }
8382
8383         /* Check for any pipes that will be fully disabled ... */
8384         list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list,
8385                             base.head) {
8386                 bool used = false;
8387
8388                 /* Don't try to disable disabled crtcs. */
8389                 if (!intel_crtc->base.enabled)
8390                         continue;
8391
8392                 list_for_each_entry(encoder, &dev->mode_config.encoder_list,
8393                                     base.head) {
8394                         if (encoder->new_crtc == intel_crtc)
8395                                 used = true;
8396                 }
8397
8398                 if (!used)
8399                         *disable_pipes |= 1 << intel_crtc->pipe;
8400         }
8401
8402
8403         /* set_mode is also used to update properties on life display pipes. */
8404         intel_crtc = to_intel_crtc(crtc);
8405         if (crtc->enabled)
8406                 *prepare_pipes |= 1 << intel_crtc->pipe;
8407
8408         /*
8409          * For simplicity do a full modeset on any pipe where the output routing
8410          * changed. We could be more clever, but that would require us to be
8411          * more careful with calling the relevant encoder->mode_set functions.
8412          */
8413         if (*prepare_pipes)
8414                 *modeset_pipes = *prepare_pipes;
8415
8416         /* ... and mask these out. */
8417         *modeset_pipes &= ~(*disable_pipes);
8418         *prepare_pipes &= ~(*disable_pipes);
8419
8420         /*
8421          * HACK: We don't (yet) fully support global modesets. intel_set_config
8422          * obies this rule, but the modeset restore mode of
8423          * intel_modeset_setup_hw_state does not.
8424          */
8425         *modeset_pipes &= 1 << intel_crtc->pipe;
8426         *prepare_pipes &= 1 << intel_crtc->pipe;
8427
8428         DRM_DEBUG_KMS("set mode pipe masks: modeset: %x, prepare: %x, disable: %x\n",
8429                       *modeset_pipes, *prepare_pipes, *disable_pipes);
8430 }
8431
8432 static bool intel_crtc_in_use(struct drm_crtc *crtc)
8433 {
8434         struct drm_encoder *encoder;
8435         struct drm_device *dev = crtc->dev;
8436
8437         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
8438                 if (encoder->crtc == crtc)
8439                         return true;
8440
8441         return false;
8442 }
8443
8444 static void
8445 intel_modeset_update_state(struct drm_device *dev, unsigned prepare_pipes)
8446 {
8447         struct intel_encoder *intel_encoder;
8448         struct intel_crtc *intel_crtc;
8449         struct drm_connector *connector;
8450
8451         list_for_each_entry(intel_encoder, &dev->mode_config.encoder_list,
8452                             base.head) {
8453                 if (!intel_encoder->base.crtc)
8454                         continue;
8455
8456                 intel_crtc = to_intel_crtc(intel_encoder->base.crtc);
8457
8458                 if (prepare_pipes & (1 << intel_crtc->pipe))
8459                         intel_encoder->connectors_active = false;
8460         }
8461
8462         intel_modeset_commit_output_state(dev);
8463
8464         /* Update computed state. */
8465         list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list,
8466                             base.head) {
8467                 intel_crtc->base.enabled = intel_crtc_in_use(&intel_crtc->base);
8468         }
8469
8470         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
8471                 if (!connector->encoder || !connector->encoder->crtc)
8472                         continue;
8473
8474                 intel_crtc = to_intel_crtc(connector->encoder->crtc);
8475
8476                 if (prepare_pipes & (1 << intel_crtc->pipe)) {
8477                         struct drm_property *dpms_property =
8478                                 dev->mode_config.dpms_property;
8479
8480                         connector->dpms = DRM_MODE_DPMS_ON;
8481                         drm_object_property_set_value(&connector->base,
8482                                                          dpms_property,
8483                                                          DRM_MODE_DPMS_ON);
8484
8485                         intel_encoder = to_intel_encoder(connector->encoder);
8486                         intel_encoder->connectors_active = true;
8487                 }
8488         }
8489
8490 }
8491
8492 static bool intel_fuzzy_clock_check(struct intel_crtc_config *cur,
8493                                     struct intel_crtc_config *new)
8494 {
8495         int clock1, clock2, diff;
8496
8497         clock1 = cur->adjusted_mode.clock;
8498         clock2 = new->adjusted_mode.clock;
8499
8500         if (clock1 == clock2)
8501                 return true;
8502
8503         if (!clock1 || !clock2)
8504                 return false;
8505
8506         diff = abs(clock1 - clock2);
8507
8508         if (((((diff + clock1 + clock2) * 100)) / (clock1 + clock2)) < 105)
8509                 return true;
8510
8511         return false;
8512 }
8513
8514 #define for_each_intel_crtc_masked(dev, mask, intel_crtc) \
8515         list_for_each_entry((intel_crtc), \
8516                             &(dev)->mode_config.crtc_list, \
8517                             base.head) \
8518                 if (mask & (1 <<(intel_crtc)->pipe))
8519
8520 static bool
8521 intel_pipe_config_compare(struct drm_device *dev,
8522                           struct intel_crtc_config *current_config,
8523                           struct intel_crtc_config *pipe_config)
8524 {
8525 #define PIPE_CONF_CHECK_X(name) \
8526         if (current_config->name != pipe_config->name) { \
8527                 DRM_ERROR("mismatch in " #name " " \
8528                           "(expected 0x%08x, found 0x%08x)\n", \
8529                           current_config->name, \
8530                           pipe_config->name); \
8531                 return false; \
8532         }
8533
8534 #define PIPE_CONF_CHECK_I(name) \
8535         if (current_config->name != pipe_config->name) { \
8536                 DRM_ERROR("mismatch in " #name " " \
8537                           "(expected %i, found %i)\n", \
8538                           current_config->name, \
8539                           pipe_config->name); \
8540                 return false; \
8541         }
8542
8543 #define PIPE_CONF_CHECK_FLAGS(name, mask)       \
8544         if ((current_config->name ^ pipe_config->name) & (mask)) { \
8545                 DRM_ERROR("mismatch in " #name "(" #mask ") "      \
8546                           "(expected %i, found %i)\n", \
8547                           current_config->name & (mask), \
8548                           pipe_config->name & (mask)); \
8549                 return false; \
8550         }
8551
8552 #define PIPE_CONF_QUIRK(quirk)  \
8553         ((current_config->quirks | pipe_config->quirks) & (quirk))
8554
8555         PIPE_CONF_CHECK_I(cpu_transcoder);
8556
8557         PIPE_CONF_CHECK_I(has_pch_encoder);
8558         PIPE_CONF_CHECK_I(fdi_lanes);
8559         PIPE_CONF_CHECK_I(fdi_m_n.gmch_m);
8560         PIPE_CONF_CHECK_I(fdi_m_n.gmch_n);
8561         PIPE_CONF_CHECK_I(fdi_m_n.link_m);
8562         PIPE_CONF_CHECK_I(fdi_m_n.link_n);
8563         PIPE_CONF_CHECK_I(fdi_m_n.tu);
8564
8565         PIPE_CONF_CHECK_I(adjusted_mode.crtc_hdisplay);
8566         PIPE_CONF_CHECK_I(adjusted_mode.crtc_htotal);
8567         PIPE_CONF_CHECK_I(adjusted_mode.crtc_hblank_start);
8568         PIPE_CONF_CHECK_I(adjusted_mode.crtc_hblank_end);
8569         PIPE_CONF_CHECK_I(adjusted_mode.crtc_hsync_start);
8570         PIPE_CONF_CHECK_I(adjusted_mode.crtc_hsync_end);
8571
8572         PIPE_CONF_CHECK_I(adjusted_mode.crtc_vdisplay);
8573         PIPE_CONF_CHECK_I(adjusted_mode.crtc_vtotal);
8574         PIPE_CONF_CHECK_I(adjusted_mode.crtc_vblank_start);
8575         PIPE_CONF_CHECK_I(adjusted_mode.crtc_vblank_end);
8576         PIPE_CONF_CHECK_I(adjusted_mode.crtc_vsync_start);
8577         PIPE_CONF_CHECK_I(adjusted_mode.crtc_vsync_end);
8578
8579         PIPE_CONF_CHECK_I(pixel_multiplier);
8580
8581         PIPE_CONF_CHECK_FLAGS(adjusted_mode.flags,
8582                               DRM_MODE_FLAG_INTERLACE);
8583
8584         if (!PIPE_CONF_QUIRK(PIPE_CONFIG_QUIRK_MODE_SYNC_FLAGS)) {
8585                 PIPE_CONF_CHECK_FLAGS(adjusted_mode.flags,
8586                                       DRM_MODE_FLAG_PHSYNC);
8587                 PIPE_CONF_CHECK_FLAGS(adjusted_mode.flags,
8588                                       DRM_MODE_FLAG_NHSYNC);
8589                 PIPE_CONF_CHECK_FLAGS(adjusted_mode.flags,
8590                                       DRM_MODE_FLAG_PVSYNC);
8591                 PIPE_CONF_CHECK_FLAGS(adjusted_mode.flags,
8592                                       DRM_MODE_FLAG_NVSYNC);
8593         }
8594
8595         PIPE_CONF_CHECK_I(requested_mode.hdisplay);
8596         PIPE_CONF_CHECK_I(requested_mode.vdisplay);
8597
8598         PIPE_CONF_CHECK_I(gmch_pfit.control);
8599         /* pfit ratios are autocomputed by the hw on gen4+ */
8600         if (INTEL_INFO(dev)->gen < 4)
8601                 PIPE_CONF_CHECK_I(gmch_pfit.pgm_ratios);
8602         PIPE_CONF_CHECK_I(gmch_pfit.lvds_border_bits);
8603         PIPE_CONF_CHECK_I(pch_pfit.pos);
8604         PIPE_CONF_CHECK_I(pch_pfit.size);
8605
8606         PIPE_CONF_CHECK_I(ips_enabled);
8607
8608         PIPE_CONF_CHECK_I(shared_dpll);
8609         PIPE_CONF_CHECK_X(dpll_hw_state.dpll);
8610         PIPE_CONF_CHECK_X(dpll_hw_state.dpll_md);
8611         PIPE_CONF_CHECK_X(dpll_hw_state.fp0);
8612         PIPE_CONF_CHECK_X(dpll_hw_state.fp1);
8613
8614 #undef PIPE_CONF_CHECK_X
8615 #undef PIPE_CONF_CHECK_I
8616 #undef PIPE_CONF_CHECK_FLAGS
8617 #undef PIPE_CONF_QUIRK
8618
8619         if (!IS_HASWELL(dev)) {
8620                 if (!intel_fuzzy_clock_check(current_config, pipe_config)) {
8621                         DRM_ERROR("mismatch in clock (expected %d, found %d)\n",
8622                                   current_config->adjusted_mode.clock,
8623                                   pipe_config->adjusted_mode.clock);
8624                         return false;
8625                 }
8626         }
8627
8628         return true;
8629 }
8630
8631 static void
8632 check_connector_state(struct drm_device *dev)
8633 {
8634         struct intel_connector *connector;
8635
8636         list_for_each_entry(connector, &dev->mode_config.connector_list,
8637                             base.head) {
8638                 /* This also checks the encoder/connector hw state with the
8639                  * ->get_hw_state callbacks. */
8640                 intel_connector_check_state(connector);
8641
8642                 WARN(&connector->new_encoder->base != connector->base.encoder,
8643                      "connector's staged encoder doesn't match current encoder\n");
8644         }
8645 }
8646
8647 static void
8648 check_encoder_state(struct drm_device *dev)
8649 {
8650         struct intel_encoder *encoder;
8651         struct intel_connector *connector;
8652
8653         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
8654                             base.head) {
8655                 bool enabled = false;
8656                 bool active = false;
8657                 enum pipe pipe, tracked_pipe;
8658
8659                 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n",
8660                               encoder->base.base.id,
8661                               drm_get_encoder_name(&encoder->base));
8662
8663                 WARN(&encoder->new_crtc->base != encoder->base.crtc,
8664                      "encoder's stage crtc doesn't match current crtc\n");
8665                 WARN(encoder->connectors_active && !encoder->base.crtc,
8666                      "encoder's active_connectors set, but no crtc\n");
8667
8668                 list_for_each_entry(connector, &dev->mode_config.connector_list,
8669                                     base.head) {
8670                         if (connector->base.encoder != &encoder->base)
8671                                 continue;
8672                         enabled = true;
8673                         if (connector->base.dpms != DRM_MODE_DPMS_OFF)
8674                                 active = true;
8675                 }
8676                 WARN(!!encoder->base.crtc != enabled,
8677                      "encoder's enabled state mismatch "
8678                      "(expected %i, found %i)\n",
8679                      !!encoder->base.crtc, enabled);
8680                 WARN(active && !encoder->base.crtc,
8681                      "active encoder with no crtc\n");
8682
8683                 WARN(encoder->connectors_active != active,
8684                      "encoder's computed active state doesn't match tracked active state "
8685                      "(expected %i, found %i)\n", active, encoder->connectors_active);
8686
8687                 active = encoder->get_hw_state(encoder, &pipe);
8688                 WARN(active != encoder->connectors_active,
8689                      "encoder's hw state doesn't match sw tracking "
8690                      "(expected %i, found %i)\n",
8691                      encoder->connectors_active, active);
8692
8693                 if (!encoder->base.crtc)
8694                         continue;
8695
8696                 tracked_pipe = to_intel_crtc(encoder->base.crtc)->pipe;
8697                 WARN(active && pipe != tracked_pipe,
8698                      "active encoder's pipe doesn't match"
8699                      "(expected %i, found %i)\n",
8700                      tracked_pipe, pipe);
8701
8702         }
8703 }
8704
8705 static void
8706 check_crtc_state(struct drm_device *dev)
8707 {
8708         drm_i915_private_t *dev_priv = dev->dev_private;
8709         struct intel_crtc *crtc;
8710         struct intel_encoder *encoder;
8711         struct intel_crtc_config pipe_config;
8712
8713         list_for_each_entry(crtc, &dev->mode_config.crtc_list,
8714                             base.head) {
8715                 bool enabled = false;
8716                 bool active = false;
8717
8718                 memset(&pipe_config, 0, sizeof(pipe_config));
8719
8720                 DRM_DEBUG_KMS("[CRTC:%d]\n",
8721                               crtc->base.base.id);
8722
8723                 WARN(crtc->active && !crtc->base.enabled,
8724                      "active crtc, but not enabled in sw tracking\n");
8725
8726                 list_for_each_entry(encoder, &dev->mode_config.encoder_list,
8727                                     base.head) {
8728                         if (encoder->base.crtc != &crtc->base)
8729                                 continue;
8730                         enabled = true;
8731                         if (encoder->connectors_active)
8732                                 active = true;
8733                 }
8734
8735                 WARN(active != crtc->active,
8736                      "crtc's computed active state doesn't match tracked active state "
8737                      "(expected %i, found %i)\n", active, crtc->active);
8738                 WARN(enabled != crtc->base.enabled,
8739                      "crtc's computed enabled state doesn't match tracked enabled state "
8740                      "(expected %i, found %i)\n", enabled, crtc->base.enabled);
8741
8742                 active = dev_priv->display.get_pipe_config(crtc,
8743                                                            &pipe_config);
8744
8745                 /* hw state is inconsistent with the pipe A quirk */
8746                 if (crtc->pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE)
8747                         active = crtc->active;
8748
8749                 list_for_each_entry(encoder, &dev->mode_config.encoder_list,
8750                                     base.head) {
8751                         enum pipe pipe;
8752                         if (encoder->base.crtc != &crtc->base)
8753                                 continue;
8754                         if (encoder->get_config &&
8755                             encoder->get_hw_state(encoder, &pipe))
8756                                 encoder->get_config(encoder, &pipe_config);
8757                 }
8758
8759                 if (dev_priv->display.get_clock)
8760                         dev_priv->display.get_clock(crtc, &pipe_config);
8761
8762                 WARN(crtc->active != active,
8763                      "crtc active state doesn't match with hw state "
8764                      "(expected %i, found %i)\n", crtc->active, active);
8765
8766                 if (active &&
8767                     !intel_pipe_config_compare(dev, &crtc->config, &pipe_config)) {
8768                         WARN(1, "pipe state doesn't match!\n");
8769                         intel_dump_pipe_config(crtc, &pipe_config,
8770                                                "[hw state]");
8771                         intel_dump_pipe_config(crtc, &crtc->config,
8772                                                "[sw state]");
8773                 }
8774         }
8775 }
8776
8777 static void
8778 check_shared_dpll_state(struct drm_device *dev)
8779 {
8780         drm_i915_private_t *dev_priv = dev->dev_private;
8781         struct intel_crtc *crtc;
8782         struct intel_dpll_hw_state dpll_hw_state;
8783         int i;
8784
8785         for (i = 0; i < dev_priv->num_shared_dpll; i++) {
8786                 struct intel_shared_dpll *pll = &dev_priv->shared_dplls[i];
8787                 int enabled_crtcs = 0, active_crtcs = 0;
8788                 bool active;
8789
8790                 memset(&dpll_hw_state, 0, sizeof(dpll_hw_state));
8791
8792                 DRM_DEBUG_KMS("%s\n", pll->name);
8793
8794                 active = pll->get_hw_state(dev_priv, pll, &dpll_hw_state);
8795
8796                 WARN(pll->active > pll->refcount,
8797                      "more active pll users than references: %i vs %i\n",
8798                      pll->active, pll->refcount);
8799                 WARN(pll->active && !pll->on,
8800                      "pll in active use but not on in sw tracking\n");
8801                 WARN(pll->on && !pll->active,
8802                      "pll in on but not on in use in sw tracking\n");
8803                 WARN(pll->on != active,
8804                      "pll on state mismatch (expected %i, found %i)\n",
8805                      pll->on, active);
8806
8807                 list_for_each_entry(crtc, &dev->mode_config.crtc_list,
8808                                     base.head) {
8809                         if (crtc->base.enabled && intel_crtc_to_shared_dpll(crtc) == pll)
8810                                 enabled_crtcs++;
8811                         if (crtc->active && intel_crtc_to_shared_dpll(crtc) == pll)
8812                                 active_crtcs++;
8813                 }
8814                 WARN(pll->active != active_crtcs,
8815                      "pll active crtcs mismatch (expected %i, found %i)\n",
8816                      pll->active, active_crtcs);
8817                 WARN(pll->refcount != enabled_crtcs,
8818                      "pll enabled crtcs mismatch (expected %i, found %i)\n",
8819                      pll->refcount, enabled_crtcs);
8820
8821                 WARN(pll->on && memcmp(&pll->hw_state, &dpll_hw_state,
8822                                        sizeof(dpll_hw_state)),
8823                      "pll hw state mismatch\n");
8824         }
8825 }
8826
8827 void
8828 intel_modeset_check_state(struct drm_device *dev)
8829 {
8830         check_connector_state(dev);
8831         check_encoder_state(dev);
8832         check_crtc_state(dev);
8833         check_shared_dpll_state(dev);
8834 }
8835
8836 static int __intel_set_mode(struct drm_crtc *crtc,
8837                             struct drm_display_mode *mode,
8838                             int x, int y, struct drm_framebuffer *fb)
8839 {
8840         struct drm_device *dev = crtc->dev;
8841         drm_i915_private_t *dev_priv = dev->dev_private;
8842         struct drm_display_mode *saved_mode, *saved_hwmode;
8843         struct intel_crtc_config *pipe_config = NULL;
8844         struct intel_crtc *intel_crtc;
8845         unsigned disable_pipes, prepare_pipes, modeset_pipes;
8846         int ret = 0;
8847
8848         saved_mode = kmalloc(2 * sizeof(*saved_mode), GFP_KERNEL);
8849         if (!saved_mode)
8850                 return -ENOMEM;
8851         saved_hwmode = saved_mode + 1;
8852
8853         intel_modeset_affected_pipes(crtc, &modeset_pipes,
8854                                      &prepare_pipes, &disable_pipes);
8855
8856         *saved_hwmode = crtc->hwmode;
8857         *saved_mode = crtc->mode;
8858
8859         /* Hack: Because we don't (yet) support global modeset on multiple
8860          * crtcs, we don't keep track of the new mode for more than one crtc.
8861          * Hence simply check whether any bit is set in modeset_pipes in all the
8862          * pieces of code that are not yet converted to deal with mutliple crtcs
8863          * changing their mode at the same time. */
8864         if (modeset_pipes) {
8865                 pipe_config = intel_modeset_pipe_config(crtc, fb, mode);
8866                 if (IS_ERR(pipe_config)) {
8867                         ret = PTR_ERR(pipe_config);
8868                         pipe_config = NULL;
8869
8870                         goto out;
8871                 }
8872                 intel_dump_pipe_config(to_intel_crtc(crtc), pipe_config,
8873                                        "[modeset]");
8874         }
8875
8876         for_each_intel_crtc_masked(dev, disable_pipes, intel_crtc)
8877                 intel_crtc_disable(&intel_crtc->base);
8878
8879         for_each_intel_crtc_masked(dev, prepare_pipes, intel_crtc) {
8880                 if (intel_crtc->base.enabled)
8881                         dev_priv->display.crtc_disable(&intel_crtc->base);
8882         }
8883
8884         /* crtc->mode is already used by the ->mode_set callbacks, hence we need
8885          * to set it here already despite that we pass it down the callchain.
8886          */
8887         if (modeset_pipes) {
8888                 crtc->mode = *mode;
8889                 /* mode_set/enable/disable functions rely on a correct pipe
8890                  * config. */
8891                 to_intel_crtc(crtc)->config = *pipe_config;
8892         }
8893
8894         /* Only after disabling all output pipelines that will be changed can we
8895          * update the the output configuration. */
8896         intel_modeset_update_state(dev, prepare_pipes);
8897
8898         if (dev_priv->display.modeset_global_resources)
8899                 dev_priv->display.modeset_global_resources(dev);
8900
8901         /* Set up the DPLL and any encoders state that needs to adjust or depend
8902          * on the DPLL.
8903          */
8904         for_each_intel_crtc_masked(dev, modeset_pipes, intel_crtc) {
8905                 ret = intel_crtc_mode_set(&intel_crtc->base,
8906                                           x, y, fb);
8907                 if (ret)
8908                         goto done;
8909         }
8910
8911         /* Now enable the clocks, plane, pipe, and connectors that we set up. */
8912         for_each_intel_crtc_masked(dev, prepare_pipes, intel_crtc)
8913                 dev_priv->display.crtc_enable(&intel_crtc->base);
8914
8915         if (modeset_pipes) {
8916                 /* Store real post-adjustment hardware mode. */
8917                 crtc->hwmode = pipe_config->adjusted_mode;
8918
8919                 /* Calculate and store various constants which
8920                  * are later needed by vblank and swap-completion
8921                  * timestamping. They are derived from true hwmode.
8922                  */
8923                 drm_calc_timestamping_constants(crtc);
8924         }
8925
8926         /* FIXME: add subpixel order */
8927 done:
8928         if (ret && crtc->enabled) {
8929                 crtc->hwmode = *saved_hwmode;
8930                 crtc->mode = *saved_mode;
8931         }
8932
8933 out:
8934         kfree(pipe_config);
8935         kfree(saved_mode);
8936         return ret;
8937 }
8938
8939 static int intel_set_mode(struct drm_crtc *crtc,
8940                           struct drm_display_mode *mode,
8941                           int x, int y, struct drm_framebuffer *fb)
8942 {
8943         int ret;
8944
8945         ret = __intel_set_mode(crtc, mode, x, y, fb);
8946
8947         if (ret == 0)
8948                 intel_modeset_check_state(crtc->dev);
8949
8950         return ret;
8951 }
8952
8953 void intel_crtc_restore_mode(struct drm_crtc *crtc)
8954 {
8955         intel_set_mode(crtc, &crtc->mode, crtc->x, crtc->y, crtc->fb);
8956 }
8957
8958 #undef for_each_intel_crtc_masked
8959
8960 static void intel_set_config_free(struct intel_set_config *config)
8961 {
8962         if (!config)
8963                 return;
8964
8965         kfree(config->save_connector_encoders);
8966         kfree(config->save_encoder_crtcs);
8967         kfree(config);
8968 }
8969
8970 static int intel_set_config_save_state(struct drm_device *dev,
8971                                        struct intel_set_config *config)
8972 {
8973         struct drm_encoder *encoder;
8974         struct drm_connector *connector;
8975         int count;
8976
8977         config->save_encoder_crtcs =
8978                 kcalloc(dev->mode_config.num_encoder,
8979                         sizeof(struct drm_crtc *), GFP_KERNEL);
8980         if (!config->save_encoder_crtcs)
8981                 return -ENOMEM;
8982
8983         config->save_connector_encoders =
8984                 kcalloc(dev->mode_config.num_connector,
8985                         sizeof(struct drm_encoder *), GFP_KERNEL);
8986         if (!config->save_connector_encoders)
8987                 return -ENOMEM;
8988
8989         /* Copy data. Note that driver private data is not affected.
8990          * Should anything bad happen only the expected state is
8991          * restored, not the drivers personal bookkeeping.
8992          */
8993         count = 0;
8994         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
8995                 config->save_encoder_crtcs[count++] = encoder->crtc;
8996         }
8997
8998         count = 0;
8999         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
9000                 config->save_connector_encoders[count++] = connector->encoder;
9001         }
9002
9003         return 0;
9004 }
9005
9006 static void intel_set_config_restore_state(struct drm_device *dev,
9007                                            struct intel_set_config *config)
9008 {
9009         struct intel_encoder *encoder;
9010         struct intel_connector *connector;
9011         int count;
9012
9013         count = 0;
9014         list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
9015                 encoder->new_crtc =
9016                         to_intel_crtc(config->save_encoder_crtcs[count++]);
9017         }
9018
9019         count = 0;
9020         list_for_each_entry(connector, &dev->mode_config.connector_list, base.head) {
9021                 connector->new_encoder =
9022                         to_intel_encoder(config->save_connector_encoders[count++]);
9023         }
9024 }
9025
9026 static bool
9027 is_crtc_connector_off(struct drm_mode_set *set)
9028 {
9029         int i;
9030
9031         if (set->num_connectors == 0)
9032                 return false;
9033
9034         if (WARN_ON(set->connectors == NULL))
9035                 return false;
9036
9037         for (i = 0; i < set->num_connectors; i++)
9038                 if (set->connectors[i]->encoder &&
9039                     set->connectors[i]->encoder->crtc == set->crtc &&
9040                     set->connectors[i]->dpms != DRM_MODE_DPMS_ON)
9041                         return true;
9042
9043         return false;
9044 }
9045
9046 static void
9047 intel_set_config_compute_mode_changes(struct drm_mode_set *set,
9048                                       struct intel_set_config *config)
9049 {
9050
9051         /* We should be able to check here if the fb has the same properties
9052          * and then just flip_or_move it */
9053         if (is_crtc_connector_off(set)) {
9054                 config->mode_changed = true;
9055         } else if (set->crtc->fb != set->fb) {
9056                 /* If we have no fb then treat it as a full mode set */
9057                 if (set->crtc->fb == NULL) {
9058                         struct intel_crtc *intel_crtc =
9059                                 to_intel_crtc(set->crtc);
9060
9061                         if (intel_crtc->active && i915_fastboot) {
9062                                 DRM_DEBUG_KMS("crtc has no fb, will flip\n");
9063                                 config->fb_changed = true;
9064                         } else {
9065                                 DRM_DEBUG_KMS("inactive crtc, full mode set\n");
9066                                 config->mode_changed = true;
9067                         }
9068                 } else if (set->fb == NULL) {
9069                         config->mode_changed = true;
9070                 } else if (set->fb->pixel_format !=
9071                            set->crtc->fb->pixel_format) {
9072                         config->mode_changed = true;
9073                 } else {
9074                         config->fb_changed = true;
9075                 }
9076         }
9077
9078         if (set->fb && (set->x != set->crtc->x || set->y != set->crtc->y))
9079                 config->fb_changed = true;
9080
9081         if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
9082                 DRM_DEBUG_KMS("modes are different, full mode set\n");
9083                 drm_mode_debug_printmodeline(&set->crtc->mode);
9084                 drm_mode_debug_printmodeline(set->mode);
9085                 config->mode_changed = true;
9086         }
9087
9088         DRM_DEBUG_KMS("computed changes for [CRTC:%d], mode_changed=%d, fb_changed=%d\n",
9089                         set->crtc->base.id, config->mode_changed, config->fb_changed);
9090 }
9091
9092 static int
9093 intel_modeset_stage_output_state(struct drm_device *dev,
9094                                  struct drm_mode_set *set,
9095                                  struct intel_set_config *config)
9096 {
9097         struct drm_crtc *new_crtc;
9098         struct intel_connector *connector;
9099         struct intel_encoder *encoder;
9100         int ro;
9101
9102         /* The upper layers ensure that we either disable a crtc or have a list
9103          * of connectors. For paranoia, double-check this. */
9104         WARN_ON(!set->fb && (set->num_connectors != 0));
9105         WARN_ON(set->fb && (set->num_connectors == 0));
9106
9107         list_for_each_entry(connector, &dev->mode_config.connector_list,
9108                             base.head) {
9109                 /* Otherwise traverse passed in connector list and get encoders
9110                  * for them. */
9111                 for (ro = 0; ro < set->num_connectors; ro++) {
9112                         if (set->connectors[ro] == &connector->base) {
9113                                 connector->new_encoder = connector->encoder;
9114                                 break;
9115                         }
9116                 }
9117
9118                 /* If we disable the crtc, disable all its connectors. Also, if
9119                  * the connector is on the changing crtc but not on the new
9120                  * connector list, disable it. */
9121                 if ((!set->fb || ro == set->num_connectors) &&
9122                     connector->base.encoder &&
9123                     connector->base.encoder->crtc == set->crtc) {
9124                         connector->new_encoder = NULL;
9125
9126                         DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
9127                                 connector->base.base.id,
9128                                 drm_get_connector_name(&connector->base));
9129                 }
9130
9131
9132                 if (&connector->new_encoder->base != connector->base.encoder) {
9133                         DRM_DEBUG_KMS("encoder changed, full mode switch\n");
9134                         config->mode_changed = true;
9135                 }
9136         }
9137         /* connector->new_encoder is now updated for all connectors. */
9138
9139         /* Update crtc of enabled connectors. */
9140         list_for_each_entry(connector, &dev->mode_config.connector_list,
9141                             base.head) {
9142                 if (!connector->new_encoder)
9143                         continue;
9144
9145                 new_crtc = connector->new_encoder->base.crtc;
9146
9147                 for (ro = 0; ro < set->num_connectors; ro++) {
9148                         if (set->connectors[ro] == &connector->base)
9149                                 new_crtc = set->crtc;
9150                 }
9151
9152                 /* Make sure the new CRTC will work with the encoder */
9153                 if (!intel_encoder_crtc_ok(&connector->new_encoder->base,
9154                                            new_crtc)) {
9155                         return -EINVAL;
9156                 }
9157                 connector->encoder->new_crtc = to_intel_crtc(new_crtc);
9158
9159                 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
9160                         connector->base.base.id,
9161                         drm_get_connector_name(&connector->base),
9162                         new_crtc->base.id);
9163         }
9164
9165         /* Check for any encoders that needs to be disabled. */
9166         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
9167                             base.head) {
9168                 list_for_each_entry(connector,
9169                                     &dev->mode_config.connector_list,
9170                                     base.head) {
9171                         if (connector->new_encoder == encoder) {
9172                                 WARN_ON(!connector->new_encoder->new_crtc);
9173
9174                                 goto next_encoder;
9175                         }
9176                 }
9177                 encoder->new_crtc = NULL;
9178 next_encoder:
9179                 /* Only now check for crtc changes so we don't miss encoders
9180                  * that will be disabled. */
9181                 if (&encoder->new_crtc->base != encoder->base.crtc) {
9182                         DRM_DEBUG_KMS("crtc changed, full mode switch\n");
9183                         config->mode_changed = true;
9184                 }
9185         }
9186         /* Now we've also updated encoder->new_crtc for all encoders. */
9187
9188         return 0;
9189 }
9190
9191 static int intel_crtc_set_config(struct drm_mode_set *set)
9192 {
9193         struct drm_device *dev;
9194         struct drm_mode_set save_set;
9195         struct intel_set_config *config;
9196         int ret;
9197
9198         BUG_ON(!set);
9199         BUG_ON(!set->crtc);
9200         BUG_ON(!set->crtc->helper_private);
9201
9202         /* Enforce sane interface api - has been abused by the fb helper. */
9203         BUG_ON(!set->mode && set->fb);
9204         BUG_ON(set->fb && set->num_connectors == 0);
9205
9206         if (set->fb) {
9207                 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
9208                                 set->crtc->base.id, set->fb->base.id,
9209                                 (int)set->num_connectors, set->x, set->y);
9210         } else {
9211                 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
9212         }
9213
9214         dev = set->crtc->dev;
9215
9216         ret = -ENOMEM;
9217         config = kzalloc(sizeof(*config), GFP_KERNEL);
9218         if (!config)
9219                 goto out_config;
9220
9221         ret = intel_set_config_save_state(dev, config);
9222         if (ret)
9223                 goto out_config;
9224
9225         save_set.crtc = set->crtc;
9226         save_set.mode = &set->crtc->mode;
9227         save_set.x = set->crtc->x;
9228         save_set.y = set->crtc->y;
9229         save_set.fb = set->crtc->fb;
9230
9231         /* Compute whether we need a full modeset, only an fb base update or no
9232          * change at all. In the future we might also check whether only the
9233          * mode changed, e.g. for LVDS where we only change the panel fitter in
9234          * such cases. */
9235         intel_set_config_compute_mode_changes(set, config);
9236
9237         ret = intel_modeset_stage_output_state(dev, set, config);
9238         if (ret)
9239                 goto fail;
9240
9241         if (config->mode_changed) {
9242                 ret = intel_set_mode(set->crtc, set->mode,
9243                                      set->x, set->y, set->fb);
9244         } else if (config->fb_changed) {
9245                 intel_crtc_wait_for_pending_flips(set->crtc);
9246
9247                 ret = intel_pipe_set_base(set->crtc,
9248                                           set->x, set->y, set->fb);
9249         }
9250
9251         if (ret) {
9252                 DRM_DEBUG_KMS("failed to set mode on [CRTC:%d], err = %d\n",
9253                               set->crtc->base.id, ret);
9254 fail:
9255                 intel_set_config_restore_state(dev, config);
9256
9257                 /* Try to restore the config */
9258                 if (config->mode_changed &&
9259                     intel_set_mode(save_set.crtc, save_set.mode,
9260                                    save_set.x, save_set.y, save_set.fb))
9261                         DRM_ERROR("failed to restore config after modeset failure\n");
9262         }
9263
9264 out_config:
9265         intel_set_config_free(config);
9266         return ret;
9267 }
9268
9269 static const struct drm_crtc_funcs intel_crtc_funcs = {
9270         .cursor_set = intel_crtc_cursor_set,
9271         .cursor_move = intel_crtc_cursor_move,
9272         .gamma_set = intel_crtc_gamma_set,
9273         .set_config = intel_crtc_set_config,
9274         .destroy = intel_crtc_destroy,
9275         .page_flip = intel_crtc_page_flip,
9276 };
9277
9278 static void intel_cpu_pll_init(struct drm_device *dev)
9279 {
9280         if (HAS_DDI(dev))
9281                 intel_ddi_pll_init(dev);
9282 }
9283
9284 static bool ibx_pch_dpll_get_hw_state(struct drm_i915_private *dev_priv,
9285                                       struct intel_shared_dpll *pll,
9286                                       struct intel_dpll_hw_state *hw_state)
9287 {
9288         uint32_t val;
9289
9290         val = I915_READ(PCH_DPLL(pll->id));
9291         hw_state->dpll = val;
9292         hw_state->fp0 = I915_READ(PCH_FP0(pll->id));
9293         hw_state->fp1 = I915_READ(PCH_FP1(pll->id));
9294
9295         return val & DPLL_VCO_ENABLE;
9296 }
9297
9298 static void ibx_pch_dpll_mode_set(struct drm_i915_private *dev_priv,
9299                                   struct intel_shared_dpll *pll)
9300 {
9301         I915_WRITE(PCH_FP0(pll->id), pll->hw_state.fp0);
9302         I915_WRITE(PCH_FP1(pll->id), pll->hw_state.fp1);
9303 }
9304
9305 static void ibx_pch_dpll_enable(struct drm_i915_private *dev_priv,
9306                                 struct intel_shared_dpll *pll)
9307 {
9308         /* PCH refclock must be enabled first */
9309         assert_pch_refclk_enabled(dev_priv);
9310
9311         I915_WRITE(PCH_DPLL(pll->id), pll->hw_state.dpll);
9312
9313         /* Wait for the clocks to stabilize. */
9314         POSTING_READ(PCH_DPLL(pll->id));
9315         udelay(150);
9316
9317         /* The pixel multiplier can only be updated once the
9318          * DPLL is enabled and the clocks are stable.
9319          *
9320          * So write it again.
9321          */
9322         I915_WRITE(PCH_DPLL(pll->id), pll->hw_state.dpll);
9323         POSTING_READ(PCH_DPLL(pll->id));
9324         udelay(200);
9325 }
9326
9327 static void ibx_pch_dpll_disable(struct drm_i915_private *dev_priv,
9328                                  struct intel_shared_dpll *pll)
9329 {
9330         struct drm_device *dev = dev_priv->dev;
9331         struct intel_crtc *crtc;
9332
9333         /* Make sure no transcoder isn't still depending on us. */
9334         list_for_each_entry(crtc, &dev->mode_config.crtc_list, base.head) {
9335                 if (intel_crtc_to_shared_dpll(crtc) == pll)
9336                         assert_pch_transcoder_disabled(dev_priv, crtc->pipe);
9337         }
9338
9339         I915_WRITE(PCH_DPLL(pll->id), 0);
9340         POSTING_READ(PCH_DPLL(pll->id));
9341         udelay(200);
9342 }
9343
9344 static char *ibx_pch_dpll_names[] = {
9345         "PCH DPLL A",
9346         "PCH DPLL B",
9347 };
9348
9349 static void ibx_pch_dpll_init(struct drm_device *dev)
9350 {
9351         struct drm_i915_private *dev_priv = dev->dev_private;
9352         int i;
9353
9354         dev_priv->num_shared_dpll = 2;
9355
9356         for (i = 0; i < dev_priv->num_shared_dpll; i++) {
9357                 dev_priv->shared_dplls[i].id = i;
9358                 dev_priv->shared_dplls[i].name = ibx_pch_dpll_names[i];
9359                 dev_priv->shared_dplls[i].mode_set = ibx_pch_dpll_mode_set;
9360                 dev_priv->shared_dplls[i].enable = ibx_pch_dpll_enable;
9361                 dev_priv->shared_dplls[i].disable = ibx_pch_dpll_disable;
9362                 dev_priv->shared_dplls[i].get_hw_state =
9363                         ibx_pch_dpll_get_hw_state;
9364         }
9365 }
9366
9367 static void intel_shared_dpll_init(struct drm_device *dev)
9368 {
9369         struct drm_i915_private *dev_priv = dev->dev_private;
9370
9371         if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
9372                 ibx_pch_dpll_init(dev);
9373         else
9374                 dev_priv->num_shared_dpll = 0;
9375
9376         BUG_ON(dev_priv->num_shared_dpll > I915_NUM_PLLS);
9377         DRM_DEBUG_KMS("%i shared PLLs initialized\n",
9378                       dev_priv->num_shared_dpll);
9379 }
9380
9381 static void intel_crtc_init(struct drm_device *dev, int pipe)
9382 {
9383         drm_i915_private_t *dev_priv = dev->dev_private;
9384         struct intel_crtc *intel_crtc;
9385         int i;
9386
9387         intel_crtc = kzalloc(sizeof(struct intel_crtc) + (INTELFB_CONN_LIMIT * sizeof(struct drm_connector *)), GFP_KERNEL);
9388         if (intel_crtc == NULL)
9389                 return;
9390
9391         drm_crtc_init(dev, &intel_crtc->base, &intel_crtc_funcs);
9392
9393         drm_mode_crtc_set_gamma_size(&intel_crtc->base, 256);
9394         for (i = 0; i < 256; i++) {
9395                 intel_crtc->lut_r[i] = i;
9396                 intel_crtc->lut_g[i] = i;
9397                 intel_crtc->lut_b[i] = i;
9398         }
9399
9400         /* Swap pipes & planes for FBC on pre-965 */
9401         intel_crtc->pipe = pipe;
9402         intel_crtc->plane = pipe;
9403         if (IS_MOBILE(dev) && IS_GEN3(dev)) {
9404                 DRM_DEBUG_KMS("swapping pipes & planes for FBC\n");
9405                 intel_crtc->plane = !pipe;
9406         }
9407
9408         BUG_ON(pipe >= ARRAY_SIZE(dev_priv->plane_to_crtc_mapping) ||
9409                dev_priv->plane_to_crtc_mapping[intel_crtc->plane] != NULL);
9410         dev_priv->plane_to_crtc_mapping[intel_crtc->plane] = &intel_crtc->base;
9411         dev_priv->pipe_to_crtc_mapping[intel_crtc->pipe] = &intel_crtc->base;
9412
9413         drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
9414 }
9415
9416 int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
9417                                 struct drm_file *file)
9418 {
9419         struct drm_i915_get_pipe_from_crtc_id *pipe_from_crtc_id = data;
9420         struct drm_mode_object *drmmode_obj;
9421         struct intel_crtc *crtc;
9422
9423         if (!drm_core_check_feature(dev, DRIVER_MODESET))
9424                 return -ENODEV;
9425
9426         drmmode_obj = drm_mode_object_find(dev, pipe_from_crtc_id->crtc_id,
9427                         DRM_MODE_OBJECT_CRTC);
9428
9429         if (!drmmode_obj) {
9430                 DRM_ERROR("no such CRTC id\n");
9431                 return -EINVAL;
9432         }
9433
9434         crtc = to_intel_crtc(obj_to_crtc(drmmode_obj));
9435         pipe_from_crtc_id->pipe = crtc->pipe;
9436
9437         return 0;
9438 }
9439
9440 static int intel_encoder_clones(struct intel_encoder *encoder)
9441 {
9442         struct drm_device *dev = encoder->base.dev;
9443         struct intel_encoder *source_encoder;
9444         int index_mask = 0;
9445         int entry = 0;
9446
9447         list_for_each_entry(source_encoder,
9448                             &dev->mode_config.encoder_list, base.head) {
9449
9450                 if (encoder == source_encoder)
9451                         index_mask |= (1 << entry);
9452
9453                 /* Intel hw has only one MUX where enocoders could be cloned. */
9454                 if (encoder->cloneable && source_encoder->cloneable)
9455                         index_mask |= (1 << entry);
9456
9457                 entry++;
9458         }
9459
9460         return index_mask;
9461 }
9462
9463 static bool has_edp_a(struct drm_device *dev)
9464 {
9465         struct drm_i915_private *dev_priv = dev->dev_private;
9466
9467         if (!IS_MOBILE(dev))
9468                 return false;
9469
9470         if ((I915_READ(DP_A) & DP_DETECTED) == 0)
9471                 return false;
9472
9473         if (IS_GEN5(dev) &&
9474             (I915_READ(ILK_DISPLAY_CHICKEN_FUSES) & ILK_eDP_A_DISABLE))
9475                 return false;
9476
9477         return true;
9478 }
9479
9480 static void intel_setup_outputs(struct drm_device *dev)
9481 {
9482         struct drm_i915_private *dev_priv = dev->dev_private;
9483         struct intel_encoder *encoder;
9484         bool dpd_is_edp = false;
9485
9486         intel_lvds_init(dev);
9487
9488         if (!IS_ULT(dev))
9489                 intel_crt_init(dev);
9490
9491         if (HAS_DDI(dev)) {
9492                 int found;
9493
9494                 /* Haswell uses DDI functions to detect digital outputs */
9495                 found = I915_READ(DDI_BUF_CTL_A) & DDI_INIT_DISPLAY_DETECTED;
9496                 /* DDI A only supports eDP */
9497                 if (found)
9498                         intel_ddi_init(dev, PORT_A);
9499
9500                 /* DDI B, C and D detection is indicated by the SFUSE_STRAP
9501                  * register */
9502                 found = I915_READ(SFUSE_STRAP);
9503
9504                 if (found & SFUSE_STRAP_DDIB_DETECTED)
9505                         intel_ddi_init(dev, PORT_B);
9506                 if (found & SFUSE_STRAP_DDIC_DETECTED)
9507                         intel_ddi_init(dev, PORT_C);
9508                 if (found & SFUSE_STRAP_DDID_DETECTED)
9509                         intel_ddi_init(dev, PORT_D);
9510         } else if (HAS_PCH_SPLIT(dev)) {
9511                 int found;
9512                 dpd_is_edp = intel_dpd_is_edp(dev);
9513
9514                 if (has_edp_a(dev))
9515                         intel_dp_init(dev, DP_A, PORT_A);
9516
9517                 if (I915_READ(PCH_HDMIB) & SDVO_DETECTED) {
9518                         /* PCH SDVOB multiplex with HDMIB */
9519                         found = intel_sdvo_init(dev, PCH_SDVOB, true);
9520                         if (!found)
9521                                 intel_hdmi_init(dev, PCH_HDMIB, PORT_B);
9522                         if (!found && (I915_READ(PCH_DP_B) & DP_DETECTED))
9523                                 intel_dp_init(dev, PCH_DP_B, PORT_B);
9524                 }
9525
9526                 if (I915_READ(PCH_HDMIC) & SDVO_DETECTED)
9527                         intel_hdmi_init(dev, PCH_HDMIC, PORT_C);
9528
9529                 if (!dpd_is_edp && I915_READ(PCH_HDMID) & SDVO_DETECTED)
9530                         intel_hdmi_init(dev, PCH_HDMID, PORT_D);
9531
9532                 if (I915_READ(PCH_DP_C) & DP_DETECTED)
9533                         intel_dp_init(dev, PCH_DP_C, PORT_C);
9534
9535                 if (I915_READ(PCH_DP_D) & DP_DETECTED)
9536                         intel_dp_init(dev, PCH_DP_D, PORT_D);
9537         } else if (IS_VALLEYVIEW(dev)) {
9538                 /* Check for built-in panel first. Shares lanes with HDMI on SDVOC */
9539                 if (I915_READ(VLV_DISPLAY_BASE + GEN4_HDMIC) & SDVO_DETECTED) {
9540                         intel_hdmi_init(dev, VLV_DISPLAY_BASE + GEN4_HDMIC,
9541                                         PORT_C);
9542                         if (I915_READ(VLV_DISPLAY_BASE + DP_C) & DP_DETECTED)
9543                                 intel_dp_init(dev, VLV_DISPLAY_BASE + DP_C,
9544                                               PORT_C);
9545                 }
9546
9547                 if (I915_READ(VLV_DISPLAY_BASE + GEN4_HDMIB) & SDVO_DETECTED) {
9548                         intel_hdmi_init(dev, VLV_DISPLAY_BASE + GEN4_HDMIB,
9549                                         PORT_B);
9550                         if (I915_READ(VLV_DISPLAY_BASE + DP_B) & DP_DETECTED)
9551                                 intel_dp_init(dev, VLV_DISPLAY_BASE + DP_B, PORT_B);
9552                 }
9553         } else if (SUPPORTS_DIGITAL_OUTPUTS(dev)) {
9554                 bool found = false;
9555
9556                 if (I915_READ(GEN3_SDVOB) & SDVO_DETECTED) {
9557                         DRM_DEBUG_KMS("probing SDVOB\n");
9558                         found = intel_sdvo_init(dev, GEN3_SDVOB, true);
9559                         if (!found && SUPPORTS_INTEGRATED_HDMI(dev)) {
9560                                 DRM_DEBUG_KMS("probing HDMI on SDVOB\n");
9561                                 intel_hdmi_init(dev, GEN4_HDMIB, PORT_B);
9562                         }
9563
9564                         if (!found && SUPPORTS_INTEGRATED_DP(dev))
9565                                 intel_dp_init(dev, DP_B, PORT_B);
9566                 }
9567
9568                 /* Before G4X SDVOC doesn't have its own detect register */
9569
9570                 if (I915_READ(GEN3_SDVOB) & SDVO_DETECTED) {
9571                         DRM_DEBUG_KMS("probing SDVOC\n");
9572                         found = intel_sdvo_init(dev, GEN3_SDVOC, false);
9573                 }
9574
9575                 if (!found && (I915_READ(GEN3_SDVOC) & SDVO_DETECTED)) {
9576
9577                         if (SUPPORTS_INTEGRATED_HDMI(dev)) {
9578                                 DRM_DEBUG_KMS("probing HDMI on SDVOC\n");
9579                                 intel_hdmi_init(dev, GEN4_HDMIC, PORT_C);
9580                         }
9581                         if (SUPPORTS_INTEGRATED_DP(dev))
9582                                 intel_dp_init(dev, DP_C, PORT_C);
9583                 }
9584
9585                 if (SUPPORTS_INTEGRATED_DP(dev) &&
9586                     (I915_READ(DP_D) & DP_DETECTED))
9587                         intel_dp_init(dev, DP_D, PORT_D);
9588         } else if (IS_GEN2(dev))
9589                 intel_dvo_init(dev);
9590
9591         if (SUPPORTS_TV(dev))
9592                 intel_tv_init(dev);
9593
9594         list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
9595                 encoder->base.possible_crtcs = encoder->crtc_mask;
9596                 encoder->base.possible_clones =
9597                         intel_encoder_clones(encoder);
9598         }
9599
9600         intel_init_pch_refclk(dev);
9601
9602         drm_helper_move_panel_connectors_to_head(dev);
9603 }
9604
9605 void intel_framebuffer_fini(struct intel_framebuffer *fb)
9606 {
9607         drm_framebuffer_cleanup(&fb->base);
9608         drm_gem_object_unreference_unlocked(&fb->obj->base);
9609 }
9610
9611 static void intel_user_framebuffer_destroy(struct drm_framebuffer *fb)
9612 {
9613         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
9614
9615         intel_framebuffer_fini(intel_fb);
9616         kfree(intel_fb);
9617 }
9618
9619 static int intel_user_framebuffer_create_handle(struct drm_framebuffer *fb,
9620                                                 struct drm_file *file,
9621                                                 unsigned int *handle)
9622 {
9623         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
9624         struct drm_i915_gem_object *obj = intel_fb->obj;
9625
9626         return drm_gem_handle_create(file, &obj->base, handle);
9627 }
9628
9629 static const struct drm_framebuffer_funcs intel_fb_funcs = {
9630         .destroy = intel_user_framebuffer_destroy,
9631         .create_handle = intel_user_framebuffer_create_handle,
9632 };
9633
9634 int intel_framebuffer_init(struct drm_device *dev,
9635                            struct intel_framebuffer *intel_fb,
9636                            struct drm_mode_fb_cmd2 *mode_cmd,
9637                            struct drm_i915_gem_object *obj)
9638 {
9639         int pitch_limit;
9640         int ret;
9641
9642         if (obj->tiling_mode == I915_TILING_Y) {
9643                 DRM_DEBUG("hardware does not support tiling Y\n");
9644                 return -EINVAL;
9645         }
9646
9647         if (mode_cmd->pitches[0] & 63) {
9648                 DRM_DEBUG("pitch (%d) must be at least 64 byte aligned\n",
9649                           mode_cmd->pitches[0]);
9650                 return -EINVAL;
9651         }
9652
9653         if (INTEL_INFO(dev)->gen >= 5 && !IS_VALLEYVIEW(dev)) {
9654                 pitch_limit = 32*1024;
9655         } else if (INTEL_INFO(dev)->gen >= 4) {
9656                 if (obj->tiling_mode)
9657                         pitch_limit = 16*1024;
9658                 else
9659                         pitch_limit = 32*1024;
9660         } else if (INTEL_INFO(dev)->gen >= 3) {
9661                 if (obj->tiling_mode)
9662                         pitch_limit = 8*1024;
9663                 else
9664                         pitch_limit = 16*1024;
9665         } else
9666                 /* XXX DSPC is limited to 4k tiled */
9667                 pitch_limit = 8*1024;
9668
9669         if (mode_cmd->pitches[0] > pitch_limit) {
9670                 DRM_DEBUG("%s pitch (%d) must be at less than %d\n",
9671                           obj->tiling_mode ? "tiled" : "linear",
9672                           mode_cmd->pitches[0], pitch_limit);
9673                 return -EINVAL;
9674         }
9675
9676         if (obj->tiling_mode != I915_TILING_NONE &&
9677             mode_cmd->pitches[0] != obj->stride) {
9678                 DRM_DEBUG("pitch (%d) must match tiling stride (%d)\n",
9679                           mode_cmd->pitches[0], obj->stride);
9680                 return -EINVAL;
9681         }
9682
9683         /* Reject formats not supported by any plane early. */
9684         switch (mode_cmd->pixel_format) {
9685         case DRM_FORMAT_C8:
9686         case DRM_FORMAT_RGB565:
9687         case DRM_FORMAT_XRGB8888:
9688         case DRM_FORMAT_ARGB8888:
9689                 break;
9690         case DRM_FORMAT_XRGB1555:
9691         case DRM_FORMAT_ARGB1555:
9692                 if (INTEL_INFO(dev)->gen > 3) {
9693                         DRM_DEBUG("unsupported pixel format: %s\n",
9694                                   drm_get_format_name(mode_cmd->pixel_format));
9695                         return -EINVAL;
9696                 }
9697                 break;
9698         case DRM_FORMAT_XBGR8888:
9699         case DRM_FORMAT_ABGR8888:
9700         case DRM_FORMAT_XRGB2101010:
9701         case DRM_FORMAT_ARGB2101010:
9702         case DRM_FORMAT_XBGR2101010:
9703         case DRM_FORMAT_ABGR2101010:
9704                 if (INTEL_INFO(dev)->gen < 4) {
9705                         DRM_DEBUG("unsupported pixel format: %s\n",
9706                                   drm_get_format_name(mode_cmd->pixel_format));
9707                         return -EINVAL;
9708                 }
9709                 break;
9710         case DRM_FORMAT_YUYV:
9711         case DRM_FORMAT_UYVY:
9712         case DRM_FORMAT_YVYU:
9713         case DRM_FORMAT_VYUY:
9714                 if (INTEL_INFO(dev)->gen < 5) {
9715                         DRM_DEBUG("unsupported pixel format: %s\n",
9716                                   drm_get_format_name(mode_cmd->pixel_format));
9717                         return -EINVAL;
9718                 }
9719                 break;
9720         default:
9721                 DRM_DEBUG("unsupported pixel format: %s\n",
9722                           drm_get_format_name(mode_cmd->pixel_format));
9723                 return -EINVAL;
9724         }
9725
9726         /* FIXME need to adjust LINOFF/TILEOFF accordingly. */
9727         if (mode_cmd->offsets[0] != 0)
9728                 return -EINVAL;
9729
9730         drm_helper_mode_fill_fb_struct(&intel_fb->base, mode_cmd);
9731         intel_fb->obj = obj;
9732
9733         ret = drm_framebuffer_init(dev, &intel_fb->base, &intel_fb_funcs);
9734         if (ret) {
9735                 DRM_ERROR("framebuffer init failed %d\n", ret);
9736                 return ret;
9737         }
9738
9739         return 0;
9740 }
9741
9742 static struct drm_framebuffer *
9743 intel_user_framebuffer_create(struct drm_device *dev,
9744                               struct drm_file *filp,
9745                               struct drm_mode_fb_cmd2 *mode_cmd)
9746 {
9747         struct drm_i915_gem_object *obj;
9748
9749         obj = to_intel_bo(drm_gem_object_lookup(dev, filp,
9750                                                 mode_cmd->handles[0]));
9751         if (&obj->base == NULL)
9752                 return ERR_PTR(-ENOENT);
9753
9754         return intel_framebuffer_create(dev, mode_cmd, obj);
9755 }
9756
9757 static const struct drm_mode_config_funcs intel_mode_funcs = {
9758         .fb_create = intel_user_framebuffer_create,
9759         .output_poll_changed = intel_fb_output_poll_changed,
9760 };
9761
9762 /* Set up chip specific display functions */
9763 static void intel_init_display(struct drm_device *dev)
9764 {
9765         struct drm_i915_private *dev_priv = dev->dev_private;
9766
9767         if (HAS_PCH_SPLIT(dev) || IS_G4X(dev))
9768                 dev_priv->display.find_dpll = g4x_find_best_dpll;
9769         else if (IS_VALLEYVIEW(dev))
9770                 dev_priv->display.find_dpll = vlv_find_best_dpll;
9771         else if (IS_PINEVIEW(dev))
9772                 dev_priv->display.find_dpll = pnv_find_best_dpll;
9773         else
9774                 dev_priv->display.find_dpll = i9xx_find_best_dpll;
9775
9776         if (HAS_DDI(dev)) {
9777                 dev_priv->display.get_pipe_config = haswell_get_pipe_config;
9778                 dev_priv->display.crtc_mode_set = haswell_crtc_mode_set;
9779                 dev_priv->display.crtc_enable = haswell_crtc_enable;
9780                 dev_priv->display.crtc_disable = haswell_crtc_disable;
9781                 dev_priv->display.off = haswell_crtc_off;
9782                 dev_priv->display.update_plane = ironlake_update_plane;
9783         } else if (HAS_PCH_SPLIT(dev)) {
9784                 dev_priv->display.get_pipe_config = ironlake_get_pipe_config;
9785                 dev_priv->display.get_clock = ironlake_crtc_clock_get;
9786                 dev_priv->display.crtc_mode_set = ironlake_crtc_mode_set;
9787                 dev_priv->display.crtc_enable = ironlake_crtc_enable;
9788                 dev_priv->display.crtc_disable = ironlake_crtc_disable;
9789                 dev_priv->display.off = ironlake_crtc_off;
9790                 dev_priv->display.update_plane = ironlake_update_plane;
9791         } else if (IS_VALLEYVIEW(dev)) {
9792                 dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
9793                 dev_priv->display.get_clock = i9xx_crtc_clock_get;
9794                 dev_priv->display.crtc_mode_set = i9xx_crtc_mode_set;
9795                 dev_priv->display.crtc_enable = valleyview_crtc_enable;
9796                 dev_priv->display.crtc_disable = i9xx_crtc_disable;
9797                 dev_priv->display.off = i9xx_crtc_off;
9798                 dev_priv->display.update_plane = i9xx_update_plane;
9799         } else {
9800                 dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
9801                 dev_priv->display.get_clock = i9xx_crtc_clock_get;
9802                 dev_priv->display.crtc_mode_set = i9xx_crtc_mode_set;
9803                 dev_priv->display.crtc_enable = i9xx_crtc_enable;
9804                 dev_priv->display.crtc_disable = i9xx_crtc_disable;
9805                 dev_priv->display.off = i9xx_crtc_off;
9806                 dev_priv->display.update_plane = i9xx_update_plane;
9807         }
9808
9809         /* Returns the core display clock speed */
9810         if (IS_VALLEYVIEW(dev))
9811                 dev_priv->display.get_display_clock_speed =
9812                         valleyview_get_display_clock_speed;
9813         else if (IS_I945G(dev) || (IS_G33(dev) && !IS_PINEVIEW_M(dev)))
9814                 dev_priv->display.get_display_clock_speed =
9815                         i945_get_display_clock_speed;
9816         else if (IS_I915G(dev))
9817                 dev_priv->display.get_display_clock_speed =
9818                         i915_get_display_clock_speed;
9819         else if (IS_I945GM(dev) || IS_845G(dev))
9820                 dev_priv->display.get_display_clock_speed =
9821                         i9xx_misc_get_display_clock_speed;
9822         else if (IS_PINEVIEW(dev))
9823                 dev_priv->display.get_display_clock_speed =
9824                         pnv_get_display_clock_speed;
9825         else if (IS_I915GM(dev))
9826                 dev_priv->display.get_display_clock_speed =
9827                         i915gm_get_display_clock_speed;
9828         else if (IS_I865G(dev))
9829                 dev_priv->display.get_display_clock_speed =
9830                         i865_get_display_clock_speed;
9831         else if (IS_I85X(dev))
9832                 dev_priv->display.get_display_clock_speed =
9833                         i855_get_display_clock_speed;
9834         else /* 852, 830 */
9835                 dev_priv->display.get_display_clock_speed =
9836                         i830_get_display_clock_speed;
9837
9838         if (HAS_PCH_SPLIT(dev)) {
9839                 if (IS_GEN5(dev)) {
9840                         dev_priv->display.fdi_link_train = ironlake_fdi_link_train;
9841                         dev_priv->display.write_eld = ironlake_write_eld;
9842                 } else if (IS_GEN6(dev)) {
9843                         dev_priv->display.fdi_link_train = gen6_fdi_link_train;
9844                         dev_priv->display.write_eld = ironlake_write_eld;
9845                 } else if (IS_IVYBRIDGE(dev)) {
9846                         /* FIXME: detect B0+ stepping and use auto training */
9847                         dev_priv->display.fdi_link_train = ivb_manual_fdi_link_train;
9848                         dev_priv->display.write_eld = ironlake_write_eld;
9849                         dev_priv->display.modeset_global_resources =
9850                                 ivb_modeset_global_resources;
9851                 } else if (IS_HASWELL(dev)) {
9852                         dev_priv->display.fdi_link_train = hsw_fdi_link_train;
9853                         dev_priv->display.write_eld = haswell_write_eld;
9854                         dev_priv->display.modeset_global_resources =
9855                                 haswell_modeset_global_resources;
9856                 }
9857         } else if (IS_G4X(dev)) {
9858                 dev_priv->display.write_eld = g4x_write_eld;
9859         }
9860
9861         /* Default just returns -ENODEV to indicate unsupported */
9862         dev_priv->display.queue_flip = intel_default_queue_flip;
9863
9864         switch (INTEL_INFO(dev)->gen) {
9865         case 2:
9866                 dev_priv->display.queue_flip = intel_gen2_queue_flip;
9867                 break;
9868
9869         case 3:
9870                 dev_priv->display.queue_flip = intel_gen3_queue_flip;
9871                 break;
9872
9873         case 4:
9874         case 5:
9875                 dev_priv->display.queue_flip = intel_gen4_queue_flip;
9876                 break;
9877
9878         case 6:
9879                 dev_priv->display.queue_flip = intel_gen6_queue_flip;
9880                 break;
9881         case 7:
9882                 dev_priv->display.queue_flip = intel_gen7_queue_flip;
9883                 break;
9884         }
9885 }
9886
9887 /*
9888  * Some BIOSes insist on assuming the GPU's pipe A is enabled at suspend,
9889  * resume, or other times.  This quirk makes sure that's the case for
9890  * affected systems.
9891  */
9892 static void quirk_pipea_force(struct drm_device *dev)
9893 {
9894         struct drm_i915_private *dev_priv = dev->dev_private;
9895
9896         dev_priv->quirks |= QUIRK_PIPEA_FORCE;
9897         DRM_INFO("applying pipe a force quirk\n");
9898 }
9899
9900 /*
9901  * Some machines (Lenovo U160) do not work with SSC on LVDS for some reason
9902  */
9903 static void quirk_ssc_force_disable(struct drm_device *dev)
9904 {
9905         struct drm_i915_private *dev_priv = dev->dev_private;
9906         dev_priv->quirks |= QUIRK_LVDS_SSC_DISABLE;
9907         DRM_INFO("applying lvds SSC disable quirk\n");
9908 }
9909
9910 /*
9911  * A machine (e.g. Acer Aspire 5734Z) may need to invert the panel backlight
9912  * brightness value
9913  */
9914 static void quirk_invert_brightness(struct drm_device *dev)
9915 {
9916         struct drm_i915_private *dev_priv = dev->dev_private;
9917         dev_priv->quirks |= QUIRK_INVERT_BRIGHTNESS;
9918         DRM_INFO("applying inverted panel brightness quirk\n");
9919 }
9920
9921 /*
9922  * Some machines (Dell XPS13) suffer broken backlight controls if
9923  * BLM_PCH_PWM_ENABLE is set.
9924  */
9925 static void quirk_no_pcm_pwm_enable(struct drm_device *dev)
9926 {
9927         struct drm_i915_private *dev_priv = dev->dev_private;
9928         dev_priv->quirks |= QUIRK_NO_PCH_PWM_ENABLE;
9929         DRM_INFO("applying no-PCH_PWM_ENABLE quirk\n");
9930 }
9931
9932 struct intel_quirk {
9933         int device;
9934         int subsystem_vendor;
9935         int subsystem_device;
9936         void (*hook)(struct drm_device *dev);
9937 };
9938
9939 /* For systems that don't have a meaningful PCI subdevice/subvendor ID */
9940 struct intel_dmi_quirk {
9941         void (*hook)(struct drm_device *dev);
9942         const struct dmi_system_id (*dmi_id_list)[];
9943 };
9944
9945 static int intel_dmi_reverse_brightness(const struct dmi_system_id *id)
9946 {
9947         DRM_INFO("Backlight polarity reversed on %s\n", id->ident);
9948         return 1;
9949 }
9950
9951 static const struct intel_dmi_quirk intel_dmi_quirks[] = {
9952         {
9953                 .dmi_id_list = &(const struct dmi_system_id[]) {
9954                         {
9955                                 .callback = intel_dmi_reverse_brightness,
9956                                 .ident = "NCR Corporation",
9957                                 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "NCR Corporation"),
9958                                             DMI_MATCH(DMI_PRODUCT_NAME, ""),
9959                                 },
9960                         },
9961                         { }  /* terminating entry */
9962                 },
9963                 .hook = quirk_invert_brightness,
9964         },
9965 };
9966
9967 static struct intel_quirk intel_quirks[] = {
9968         /* HP Mini needs pipe A force quirk (LP: #322104) */
9969         { 0x27ae, 0x103c, 0x361a, quirk_pipea_force },
9970
9971         /* Toshiba Protege R-205, S-209 needs pipe A force quirk */
9972         { 0x2592, 0x1179, 0x0001, quirk_pipea_force },
9973
9974         /* ThinkPad T60 needs pipe A force quirk (bug #16494) */
9975         { 0x2782, 0x17aa, 0x201a, quirk_pipea_force },
9976
9977         /* 830/845 need to leave pipe A & dpll A up */
9978         { 0x2562, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
9979         { 0x3577, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
9980
9981         /* Lenovo U160 cannot use SSC on LVDS */
9982         { 0x0046, 0x17aa, 0x3920, quirk_ssc_force_disable },
9983
9984         /* Sony Vaio Y cannot use SSC on LVDS */
9985         { 0x0046, 0x104d, 0x9076, quirk_ssc_force_disable },
9986
9987         /* Acer Aspire 5734Z must invert backlight brightness */
9988         { 0x2a42, 0x1025, 0x0459, quirk_invert_brightness },
9989
9990         /* Acer/eMachines G725 */
9991         { 0x2a42, 0x1025, 0x0210, quirk_invert_brightness },
9992
9993         /* Acer/eMachines e725 */
9994         { 0x2a42, 0x1025, 0x0212, quirk_invert_brightness },
9995
9996         /* Acer/Packard Bell NCL20 */
9997         { 0x2a42, 0x1025, 0x034b, quirk_invert_brightness },
9998
9999         /* Acer Aspire 4736Z */
10000         { 0x2a42, 0x1025, 0x0260, quirk_invert_brightness },
10001
10002         /* Dell XPS13 HD Sandy Bridge */
10003         { 0x0116, 0x1028, 0x052e, quirk_no_pcm_pwm_enable },
10004         /* Dell XPS13 HD and XPS13 FHD Ivy Bridge */
10005         { 0x0166, 0x1028, 0x058b, quirk_no_pcm_pwm_enable },
10006 };
10007
10008 static void intel_init_quirks(struct drm_device *dev)
10009 {
10010         struct pci_dev *d = dev->pdev;
10011         int i;
10012
10013         for (i = 0; i < ARRAY_SIZE(intel_quirks); i++) {
10014                 struct intel_quirk *q = &intel_quirks[i];
10015
10016                 if (d->device == q->device &&
10017                     (d->subsystem_vendor == q->subsystem_vendor ||
10018                      q->subsystem_vendor == PCI_ANY_ID) &&
10019                     (d->subsystem_device == q->subsystem_device ||
10020                      q->subsystem_device == PCI_ANY_ID))
10021                         q->hook(dev);
10022         }
10023         for (i = 0; i < ARRAY_SIZE(intel_dmi_quirks); i++) {
10024                 if (dmi_check_system(*intel_dmi_quirks[i].dmi_id_list) != 0)
10025                         intel_dmi_quirks[i].hook(dev);
10026         }
10027 }
10028
10029 /* Disable the VGA plane that we never use */
10030 static void i915_disable_vga(struct drm_device *dev)
10031 {
10032         struct drm_i915_private *dev_priv = dev->dev_private;
10033         u8 sr1;
10034         u32 vga_reg = i915_vgacntrl_reg(dev);
10035
10036         vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO);
10037         outb(SR01, VGA_SR_INDEX);
10038         sr1 = inb(VGA_SR_DATA);
10039         outb(sr1 | 1<<5, VGA_SR_DATA);
10040         vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
10041         udelay(300);
10042
10043         I915_WRITE(vga_reg, VGA_DISP_DISABLE);
10044         POSTING_READ(vga_reg);
10045 }
10046
10047 void intel_modeset_init_hw(struct drm_device *dev)
10048 {
10049         intel_init_power_well(dev);
10050
10051         intel_prepare_ddi(dev);
10052
10053         intel_init_clock_gating(dev);
10054
10055         mutex_lock(&dev->struct_mutex);
10056         intel_enable_gt_powersave(dev);
10057         mutex_unlock(&dev->struct_mutex);
10058 }
10059
10060 void intel_modeset_suspend_hw(struct drm_device *dev)
10061 {
10062         intel_suspend_hw(dev);
10063 }
10064
10065 void intel_modeset_init(struct drm_device *dev)
10066 {
10067         struct drm_i915_private *dev_priv = dev->dev_private;
10068         int i, j, ret;
10069
10070         drm_mode_config_init(dev);
10071
10072         dev->mode_config.min_width = 0;
10073         dev->mode_config.min_height = 0;
10074
10075         dev->mode_config.preferred_depth = 24;
10076         dev->mode_config.prefer_shadow = 1;
10077
10078         dev->mode_config.funcs = &intel_mode_funcs;
10079
10080         intel_init_quirks(dev);
10081
10082         intel_init_pm(dev);
10083
10084         if (INTEL_INFO(dev)->num_pipes == 0)
10085                 return;
10086
10087         intel_init_display(dev);
10088
10089         if (IS_GEN2(dev)) {
10090                 dev->mode_config.max_width = 2048;
10091                 dev->mode_config.max_height = 2048;
10092         } else if (IS_GEN3(dev)) {
10093                 dev->mode_config.max_width = 4096;
10094                 dev->mode_config.max_height = 4096;
10095         } else {
10096                 dev->mode_config.max_width = 8192;
10097                 dev->mode_config.max_height = 8192;
10098         }
10099         dev->mode_config.fb_base = dev_priv->gtt.mappable_base;
10100
10101         DRM_DEBUG_KMS("%d display pipe%s available.\n",
10102                       INTEL_INFO(dev)->num_pipes,
10103                       INTEL_INFO(dev)->num_pipes > 1 ? "s" : "");
10104
10105         for_each_pipe(i) {
10106                 intel_crtc_init(dev, i);
10107                 for (j = 0; j < dev_priv->num_plane; j++) {
10108                         ret = intel_plane_init(dev, i, j);
10109                         if (ret)
10110                                 DRM_DEBUG_KMS("pipe %c sprite %c init failed: %d\n",
10111                                               pipe_name(i), sprite_name(i, j), ret);
10112                 }
10113         }
10114
10115         intel_cpu_pll_init(dev);
10116         intel_shared_dpll_init(dev);
10117
10118         /* Just disable it once at startup */
10119         i915_disable_vga(dev);
10120         intel_setup_outputs(dev);
10121
10122         /* Just in case the BIOS is doing something questionable. */
10123         intel_disable_fbc(dev);
10124 }
10125
10126 static void
10127 intel_connector_break_all_links(struct intel_connector *connector)
10128 {
10129         connector->base.dpms = DRM_MODE_DPMS_OFF;
10130         connector->base.encoder = NULL;
10131         connector->encoder->connectors_active = false;
10132         connector->encoder->base.crtc = NULL;
10133 }
10134
10135 static void intel_enable_pipe_a(struct drm_device *dev)
10136 {
10137         struct intel_connector *connector;
10138         struct drm_connector *crt = NULL;
10139         struct intel_load_detect_pipe load_detect_temp;
10140
10141         /* We can't just switch on the pipe A, we need to set things up with a
10142          * proper mode and output configuration. As a gross hack, enable pipe A
10143          * by enabling the load detect pipe once. */
10144         list_for_each_entry(connector,
10145                             &dev->mode_config.connector_list,
10146                             base.head) {
10147                 if (connector->encoder->type == INTEL_OUTPUT_ANALOG) {
10148                         crt = &connector->base;
10149                         break;
10150                 }
10151         }
10152
10153         if (!crt)
10154                 return;
10155
10156         if (intel_get_load_detect_pipe(crt, NULL, &load_detect_temp))
10157                 intel_release_load_detect_pipe(crt, &load_detect_temp);
10158
10159
10160 }
10161
10162 static bool
10163 intel_check_plane_mapping(struct intel_crtc *crtc)
10164 {
10165         struct drm_device *dev = crtc->base.dev;
10166         struct drm_i915_private *dev_priv = dev->dev_private;
10167         u32 reg, val;
10168
10169         if (INTEL_INFO(dev)->num_pipes == 1)
10170                 return true;
10171
10172         reg = DSPCNTR(!crtc->plane);
10173         val = I915_READ(reg);
10174
10175         if ((val & DISPLAY_PLANE_ENABLE) &&
10176             (!!(val & DISPPLANE_SEL_PIPE_MASK) == crtc->pipe))
10177                 return false;
10178
10179         return true;
10180 }
10181
10182 static void intel_sanitize_crtc(struct intel_crtc *crtc)
10183 {
10184         struct drm_device *dev = crtc->base.dev;
10185         struct drm_i915_private *dev_priv = dev->dev_private;
10186         u32 reg;
10187
10188         /* Clear any frame start delays used for debugging left by the BIOS */
10189         reg = PIPECONF(crtc->config.cpu_transcoder);
10190         I915_WRITE(reg, I915_READ(reg) & ~PIPECONF_FRAME_START_DELAY_MASK);
10191
10192         /* We need to sanitize the plane -> pipe mapping first because this will
10193          * disable the crtc (and hence change the state) if it is wrong. Note
10194          * that gen4+ has a fixed plane -> pipe mapping.  */
10195         if (INTEL_INFO(dev)->gen < 4 && !intel_check_plane_mapping(crtc)) {
10196                 struct intel_connector *connector;
10197                 bool plane;
10198
10199                 DRM_DEBUG_KMS("[CRTC:%d] wrong plane connection detected!\n",
10200                               crtc->base.base.id);
10201
10202                 /* Pipe has the wrong plane attached and the plane is active.
10203                  * Temporarily change the plane mapping and disable everything
10204                  * ...  */
10205                 plane = crtc->plane;
10206                 crtc->plane = !plane;
10207                 dev_priv->display.crtc_disable(&crtc->base);
10208                 crtc->plane = plane;
10209
10210                 /* ... and break all links. */
10211                 list_for_each_entry(connector, &dev->mode_config.connector_list,
10212                                     base.head) {
10213                         if (connector->encoder->base.crtc != &crtc->base)
10214                                 continue;
10215
10216                         intel_connector_break_all_links(connector);
10217                 }
10218
10219                 WARN_ON(crtc->active);
10220                 crtc->base.enabled = false;
10221         }
10222
10223         if (dev_priv->quirks & QUIRK_PIPEA_FORCE &&
10224             crtc->pipe == PIPE_A && !crtc->active) {
10225                 /* BIOS forgot to enable pipe A, this mostly happens after
10226                  * resume. Force-enable the pipe to fix this, the update_dpms
10227                  * call below we restore the pipe to the right state, but leave
10228                  * the required bits on. */
10229                 intel_enable_pipe_a(dev);
10230         }
10231
10232         /* Adjust the state of the output pipe according to whether we
10233          * have active connectors/encoders. */
10234         intel_crtc_update_dpms(&crtc->base);
10235
10236         if (crtc->active != crtc->base.enabled) {
10237                 struct intel_encoder *encoder;
10238
10239                 /* This can happen either due to bugs in the get_hw_state
10240                  * functions or because the pipe is force-enabled due to the
10241                  * pipe A quirk. */
10242                 DRM_DEBUG_KMS("[CRTC:%d] hw state adjusted, was %s, now %s\n",
10243                               crtc->base.base.id,
10244                               crtc->base.enabled ? "enabled" : "disabled",
10245                               crtc->active ? "enabled" : "disabled");
10246
10247                 crtc->base.enabled = crtc->active;
10248
10249                 /* Because we only establish the connector -> encoder ->
10250                  * crtc links if something is active, this means the
10251                  * crtc is now deactivated. Break the links. connector
10252                  * -> encoder links are only establish when things are
10253                  *  actually up, hence no need to break them. */
10254                 WARN_ON(crtc->active);
10255
10256                 for_each_encoder_on_crtc(dev, &crtc->base, encoder) {
10257                         WARN_ON(encoder->connectors_active);
10258                         encoder->base.crtc = NULL;
10259                 }
10260         }
10261 }
10262
10263 static void intel_sanitize_encoder(struct intel_encoder *encoder)
10264 {
10265         struct intel_connector *connector;
10266         struct drm_device *dev = encoder->base.dev;
10267
10268         /* We need to check both for a crtc link (meaning that the
10269          * encoder is active and trying to read from a pipe) and the
10270          * pipe itself being active. */
10271         bool has_active_crtc = encoder->base.crtc &&
10272                 to_intel_crtc(encoder->base.crtc)->active;
10273
10274         if (encoder->connectors_active && !has_active_crtc) {
10275                 DRM_DEBUG_KMS("[ENCODER:%d:%s] has active connectors but no active pipe!\n",
10276                               encoder->base.base.id,
10277                               drm_get_encoder_name(&encoder->base));
10278
10279                 /* Connector is active, but has no active pipe. This is
10280                  * fallout from our resume register restoring. Disable
10281                  * the encoder manually again. */
10282                 if (encoder->base.crtc) {
10283                         DRM_DEBUG_KMS("[ENCODER:%d:%s] manually disabled\n",
10284                                       encoder->base.base.id,
10285                                       drm_get_encoder_name(&encoder->base));
10286                         encoder->disable(encoder);
10287                 }
10288
10289                 /* Inconsistent output/port/pipe state happens presumably due to
10290                  * a bug in one of the get_hw_state functions. Or someplace else
10291                  * in our code, like the register restore mess on resume. Clamp
10292                  * things to off as a safer default. */
10293                 list_for_each_entry(connector,
10294                                     &dev->mode_config.connector_list,
10295                                     base.head) {
10296                         if (connector->encoder != encoder)
10297                                 continue;
10298
10299                         intel_connector_break_all_links(connector);
10300                 }
10301         }
10302         /* Enabled encoders without active connectors will be fixed in
10303          * the crtc fixup. */
10304 }
10305
10306 void i915_redisable_vga(struct drm_device *dev)
10307 {
10308         struct drm_i915_private *dev_priv = dev->dev_private;
10309         u32 vga_reg = i915_vgacntrl_reg(dev);
10310
10311         /* This function can be called both from intel_modeset_setup_hw_state or
10312          * at a very early point in our resume sequence, where the power well
10313          * structures are not yet restored. Since this function is at a very
10314          * paranoid "someone might have enabled VGA while we were not looking"
10315          * level, just check if the power well is enabled instead of trying to
10316          * follow the "don't touch the power well if we don't need it" policy
10317          * the rest of the driver uses. */
10318         if (HAS_POWER_WELL(dev) &&
10319             (I915_READ(HSW_PWR_WELL_DRIVER) & HSW_PWR_WELL_STATE_ENABLED) == 0)
10320                 return;
10321
10322         if (I915_READ(vga_reg) != VGA_DISP_DISABLE) {
10323                 DRM_DEBUG_KMS("Something enabled VGA plane, disabling it\n");
10324                 i915_disable_vga(dev);
10325         }
10326 }
10327
10328 static void intel_modeset_readout_hw_state(struct drm_device *dev)
10329 {
10330         struct drm_i915_private *dev_priv = dev->dev_private;
10331         enum pipe pipe;
10332         struct intel_crtc *crtc;
10333         struct intel_encoder *encoder;
10334         struct intel_connector *connector;
10335         int i;
10336
10337         list_for_each_entry(crtc, &dev->mode_config.crtc_list,
10338                             base.head) {
10339                 memset(&crtc->config, 0, sizeof(crtc->config));
10340
10341                 crtc->active = dev_priv->display.get_pipe_config(crtc,
10342                                                                  &crtc->config);
10343
10344                 crtc->base.enabled = crtc->active;
10345
10346                 DRM_DEBUG_KMS("[CRTC:%d] hw state readout: %s\n",
10347                               crtc->base.base.id,
10348                               crtc->active ? "enabled" : "disabled");
10349         }
10350
10351         /* FIXME: Smash this into the new shared dpll infrastructure. */
10352         if (HAS_DDI(dev))
10353                 intel_ddi_setup_hw_pll_state(dev);
10354
10355         for (i = 0; i < dev_priv->num_shared_dpll; i++) {
10356                 struct intel_shared_dpll *pll = &dev_priv->shared_dplls[i];
10357
10358                 pll->on = pll->get_hw_state(dev_priv, pll, &pll->hw_state);
10359                 pll->active = 0;
10360                 list_for_each_entry(crtc, &dev->mode_config.crtc_list,
10361                                     base.head) {
10362                         if (crtc->active && intel_crtc_to_shared_dpll(crtc) == pll)
10363                                 pll->active++;
10364                 }
10365                 pll->refcount = pll->active;
10366
10367                 DRM_DEBUG_KMS("%s hw state readout: refcount %i, on %i\n",
10368                               pll->name, pll->refcount, pll->on);
10369         }
10370
10371         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
10372                             base.head) {
10373                 pipe = 0;
10374
10375                 if (encoder->get_hw_state(encoder, &pipe)) {
10376                         crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
10377                         encoder->base.crtc = &crtc->base;
10378                         if (encoder->get_config)
10379                                 encoder->get_config(encoder, &crtc->config);
10380                 } else {
10381                         encoder->base.crtc = NULL;
10382                 }
10383
10384                 encoder->connectors_active = false;
10385                 DRM_DEBUG_KMS("[ENCODER:%d:%s] hw state readout: %s, pipe=%i\n",
10386                               encoder->base.base.id,
10387                               drm_get_encoder_name(&encoder->base),
10388                               encoder->base.crtc ? "enabled" : "disabled",
10389                               pipe);
10390         }
10391
10392         list_for_each_entry(crtc, &dev->mode_config.crtc_list,
10393                             base.head) {
10394                 if (!crtc->active)
10395                         continue;
10396                 if (dev_priv->display.get_clock)
10397                         dev_priv->display.get_clock(crtc,
10398                                                     &crtc->config);
10399         }
10400
10401         list_for_each_entry(connector, &dev->mode_config.connector_list,
10402                             base.head) {
10403                 if (connector->get_hw_state(connector)) {
10404                         connector->base.dpms = DRM_MODE_DPMS_ON;
10405                         connector->encoder->connectors_active = true;
10406                         connector->base.encoder = &connector->encoder->base;
10407                 } else {
10408                         connector->base.dpms = DRM_MODE_DPMS_OFF;
10409                         connector->base.encoder = NULL;
10410                 }
10411                 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] hw state readout: %s\n",
10412                               connector->base.base.id,
10413                               drm_get_connector_name(&connector->base),
10414                               connector->base.encoder ? "enabled" : "disabled");
10415         }
10416 }
10417
10418 /* Scan out the current hw modeset state, sanitizes it and maps it into the drm
10419  * and i915 state tracking structures. */
10420 void intel_modeset_setup_hw_state(struct drm_device *dev,
10421                                   bool force_restore)
10422 {
10423         struct drm_i915_private *dev_priv = dev->dev_private;
10424         enum pipe pipe;
10425         struct drm_plane *plane;
10426         struct intel_crtc *crtc;
10427         struct intel_encoder *encoder;
10428         int i;
10429
10430         intel_modeset_readout_hw_state(dev);
10431
10432         /*
10433          * Now that we have the config, copy it to each CRTC struct
10434          * Note that this could go away if we move to using crtc_config
10435          * checking everywhere.
10436          */
10437         list_for_each_entry(crtc, &dev->mode_config.crtc_list,
10438                             base.head) {
10439                 if (crtc->active && i915_fastboot) {
10440                         intel_crtc_mode_from_pipe_config(crtc, &crtc->config);
10441
10442                         DRM_DEBUG_KMS("[CRTC:%d] found active mode: ",
10443                                       crtc->base.base.id);
10444                         drm_mode_debug_printmodeline(&crtc->base.mode);
10445                 }
10446         }
10447
10448         /* HW state is read out, now we need to sanitize this mess. */
10449         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
10450                             base.head) {
10451                 intel_sanitize_encoder(encoder);
10452         }
10453
10454         for_each_pipe(pipe) {
10455                 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
10456                 intel_sanitize_crtc(crtc);
10457                 intel_dump_pipe_config(crtc, &crtc->config, "[setup_hw_state]");
10458         }
10459
10460         for (i = 0; i < dev_priv->num_shared_dpll; i++) {
10461                 struct intel_shared_dpll *pll = &dev_priv->shared_dplls[i];
10462
10463                 if (!pll->on || pll->active)
10464                         continue;
10465
10466                 DRM_DEBUG_KMS("%s enabled but not in use, disabling\n", pll->name);
10467
10468                 pll->disable(dev_priv, pll);
10469                 pll->on = false;
10470         }
10471
10472         if (force_restore) {
10473                 /*
10474                  * We need to use raw interfaces for restoring state to avoid
10475                  * checking (bogus) intermediate states.
10476                  */
10477                 for_each_pipe(pipe) {
10478                         struct drm_crtc *crtc =
10479                                 dev_priv->pipe_to_crtc_mapping[pipe];
10480
10481                         __intel_set_mode(crtc, &crtc->mode, crtc->x, crtc->y,
10482                                          crtc->fb);
10483                 }
10484                 list_for_each_entry(plane, &dev->mode_config.plane_list, head)
10485                         intel_plane_restore(plane);
10486
10487                 i915_redisable_vga(dev);
10488         } else {
10489                 intel_modeset_update_staged_output_state(dev);
10490         }
10491
10492         intel_modeset_check_state(dev);
10493
10494         drm_mode_config_reset(dev);
10495 }
10496
10497 void intel_modeset_gem_init(struct drm_device *dev)
10498 {
10499         intel_modeset_init_hw(dev);
10500
10501         intel_setup_overlay(dev);
10502
10503         intel_modeset_setup_hw_state(dev, false);
10504 }
10505
10506 void intel_modeset_cleanup(struct drm_device *dev)
10507 {
10508         struct drm_i915_private *dev_priv = dev->dev_private;
10509         struct drm_crtc *crtc;
10510
10511         /*
10512          * Interrupts and polling as the first thing to avoid creating havoc.
10513          * Too much stuff here (turning of rps, connectors, ...) would
10514          * experience fancy races otherwise.
10515          */
10516         drm_irq_uninstall(dev);
10517         cancel_work_sync(&dev_priv->hotplug_work);
10518         /*
10519          * Due to the hpd irq storm handling the hotplug work can re-arm the
10520          * poll handlers. Hence disable polling after hpd handling is shut down.
10521          */
10522         drm_kms_helper_poll_fini(dev);
10523
10524         mutex_lock(&dev->struct_mutex);
10525
10526         intel_unregister_dsm_handler();
10527
10528         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
10529                 /* Skip inactive CRTCs */
10530                 if (!crtc->fb)
10531                         continue;
10532
10533                 intel_increase_pllclock(crtc);
10534         }
10535
10536         intel_disable_fbc(dev);
10537
10538         intel_disable_gt_powersave(dev);
10539
10540         ironlake_teardown_rc6(dev);
10541
10542         mutex_unlock(&dev->struct_mutex);
10543
10544         /* flush any delayed tasks or pending work */
10545         flush_scheduled_work();
10546
10547         /* destroy backlight, if any, before the connectors */
10548         intel_panel_destroy_backlight(dev);
10549
10550         drm_mode_config_cleanup(dev);
10551
10552         intel_cleanup_overlay(dev);
10553 }
10554
10555 /*
10556  * Return which encoder is currently attached for connector.
10557  */
10558 struct drm_encoder *intel_best_encoder(struct drm_connector *connector)
10559 {
10560         return &intel_attached_encoder(connector)->base;
10561 }
10562
10563 void intel_connector_attach_encoder(struct intel_connector *connector,
10564                                     struct intel_encoder *encoder)
10565 {
10566         connector->encoder = encoder;
10567         drm_mode_connector_attach_encoder(&connector->base,
10568                                           &encoder->base);
10569 }
10570
10571 /*
10572  * set vga decode state - true == enable VGA decode
10573  */
10574 int intel_modeset_vga_set_state(struct drm_device *dev, bool state)
10575 {
10576         struct drm_i915_private *dev_priv = dev->dev_private;
10577         u16 gmch_ctrl;
10578
10579         pci_read_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, &gmch_ctrl);
10580         if (state)
10581                 gmch_ctrl &= ~INTEL_GMCH_VGA_DISABLE;
10582         else
10583                 gmch_ctrl |= INTEL_GMCH_VGA_DISABLE;
10584         pci_write_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, gmch_ctrl);
10585         return 0;
10586 }
10587
10588 struct intel_display_error_state {
10589
10590         u32 power_well_driver;
10591
10592         int num_transcoders;
10593
10594         struct intel_cursor_error_state {
10595                 u32 control;
10596                 u32 position;
10597                 u32 base;
10598                 u32 size;
10599         } cursor[I915_MAX_PIPES];
10600
10601         struct intel_pipe_error_state {
10602                 u32 source;
10603         } pipe[I915_MAX_PIPES];
10604
10605         struct intel_plane_error_state {
10606                 u32 control;
10607                 u32 stride;
10608                 u32 size;
10609                 u32 pos;
10610                 u32 addr;
10611                 u32 surface;
10612                 u32 tile_offset;
10613         } plane[I915_MAX_PIPES];
10614
10615         struct intel_transcoder_error_state {
10616                 enum transcoder cpu_transcoder;
10617
10618                 u32 conf;
10619
10620                 u32 htotal;
10621                 u32 hblank;
10622                 u32 hsync;
10623                 u32 vtotal;
10624                 u32 vblank;
10625                 u32 vsync;
10626         } transcoder[4];
10627 };
10628
10629 struct intel_display_error_state *
10630 intel_display_capture_error_state(struct drm_device *dev)
10631 {
10632         drm_i915_private_t *dev_priv = dev->dev_private;
10633         struct intel_display_error_state *error;
10634         int transcoders[] = {
10635                 TRANSCODER_A,
10636                 TRANSCODER_B,
10637                 TRANSCODER_C,
10638                 TRANSCODER_EDP,
10639         };
10640         int i;
10641
10642         if (INTEL_INFO(dev)->num_pipes == 0)
10643                 return NULL;
10644
10645         error = kmalloc(sizeof(*error), GFP_ATOMIC);
10646         if (error == NULL)
10647                 return NULL;
10648
10649         if (HAS_POWER_WELL(dev))
10650                 error->power_well_driver = I915_READ(HSW_PWR_WELL_DRIVER);
10651
10652         for_each_pipe(i) {
10653                 if (INTEL_INFO(dev)->gen <= 6 || IS_VALLEYVIEW(dev)) {
10654                         error->cursor[i].control = I915_READ(CURCNTR(i));
10655                         error->cursor[i].position = I915_READ(CURPOS(i));
10656                         error->cursor[i].base = I915_READ(CURBASE(i));
10657                 } else {
10658                         error->cursor[i].control = I915_READ(CURCNTR_IVB(i));
10659                         error->cursor[i].position = I915_READ(CURPOS_IVB(i));
10660                         error->cursor[i].base = I915_READ(CURBASE_IVB(i));
10661                 }
10662
10663                 error->plane[i].control = I915_READ(DSPCNTR(i));
10664                 error->plane[i].stride = I915_READ(DSPSTRIDE(i));
10665                 if (INTEL_INFO(dev)->gen <= 3) {
10666                         error->plane[i].size = I915_READ(DSPSIZE(i));
10667                         error->plane[i].pos = I915_READ(DSPPOS(i));
10668                 }
10669                 if (INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev))
10670                         error->plane[i].addr = I915_READ(DSPADDR(i));
10671                 if (INTEL_INFO(dev)->gen >= 4) {
10672                         error->plane[i].surface = I915_READ(DSPSURF(i));
10673                         error->plane[i].tile_offset = I915_READ(DSPTILEOFF(i));
10674                 }
10675
10676                 error->pipe[i].source = I915_READ(PIPESRC(i));
10677         }
10678
10679         error->num_transcoders = INTEL_INFO(dev)->num_pipes;
10680         if (HAS_DDI(dev_priv->dev))
10681                 error->num_transcoders++; /* Account for eDP. */
10682
10683         for (i = 0; i < error->num_transcoders; i++) {
10684                 enum transcoder cpu_transcoder = transcoders[i];
10685
10686                 error->transcoder[i].cpu_transcoder = cpu_transcoder;
10687
10688                 error->transcoder[i].conf = I915_READ(PIPECONF(cpu_transcoder));
10689                 error->transcoder[i].htotal = I915_READ(HTOTAL(cpu_transcoder));
10690                 error->transcoder[i].hblank = I915_READ(HBLANK(cpu_transcoder));
10691                 error->transcoder[i].hsync = I915_READ(HSYNC(cpu_transcoder));
10692                 error->transcoder[i].vtotal = I915_READ(VTOTAL(cpu_transcoder));
10693                 error->transcoder[i].vblank = I915_READ(VBLANK(cpu_transcoder));
10694                 error->transcoder[i].vsync = I915_READ(VSYNC(cpu_transcoder));
10695         }
10696
10697         /* In the code above we read the registers without checking if the power
10698          * well was on, so here we have to clear the FPGA_DBG_RM_NOCLAIM bit to
10699          * prevent the next I915_WRITE from detecting it and printing an error
10700          * message. */
10701         intel_uncore_clear_errors(dev);
10702
10703         return error;
10704 }
10705
10706 #define err_printf(e, ...) i915_error_printf(e, __VA_ARGS__)
10707
10708 void
10709 intel_display_print_error_state(struct drm_i915_error_state_buf *m,
10710                                 struct drm_device *dev,
10711                                 struct intel_display_error_state *error)
10712 {
10713         int i;
10714
10715         if (!error)
10716                 return;
10717
10718         err_printf(m, "Num Pipes: %d\n", INTEL_INFO(dev)->num_pipes);
10719         if (HAS_POWER_WELL(dev))
10720                 err_printf(m, "PWR_WELL_CTL2: %08x\n",
10721                            error->power_well_driver);
10722         for_each_pipe(i) {
10723                 err_printf(m, "Pipe [%d]:\n", i);
10724                 err_printf(m, "  SRC: %08x\n", error->pipe[i].source);
10725
10726                 err_printf(m, "Plane [%d]:\n", i);
10727                 err_printf(m, "  CNTR: %08x\n", error->plane[i].control);
10728                 err_printf(m, "  STRIDE: %08x\n", error->plane[i].stride);
10729                 if (INTEL_INFO(dev)->gen <= 3) {
10730                         err_printf(m, "  SIZE: %08x\n", error->plane[i].size);
10731                         err_printf(m, "  POS: %08x\n", error->plane[i].pos);
10732                 }
10733                 if (INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev))
10734                         err_printf(m, "  ADDR: %08x\n", error->plane[i].addr);
10735                 if (INTEL_INFO(dev)->gen >= 4) {
10736                         err_printf(m, "  SURF: %08x\n", error->plane[i].surface);
10737                         err_printf(m, "  TILEOFF: %08x\n", error->plane[i].tile_offset);
10738                 }
10739
10740                 err_printf(m, "Cursor [%d]:\n", i);
10741                 err_printf(m, "  CNTR: %08x\n", error->cursor[i].control);
10742                 err_printf(m, "  POS: %08x\n", error->cursor[i].position);
10743                 err_printf(m, "  BASE: %08x\n", error->cursor[i].base);
10744         }
10745
10746         for (i = 0; i < error->num_transcoders; i++) {
10747                 err_printf(m, "  CPU transcoder: %c\n",
10748                            transcoder_name(error->transcoder[i].cpu_transcoder));
10749                 err_printf(m, "  CONF: %08x\n", error->transcoder[i].conf);
10750                 err_printf(m, "  HTOTAL: %08x\n", error->transcoder[i].htotal);
10751                 err_printf(m, "  HBLANK: %08x\n", error->transcoder[i].hblank);
10752                 err_printf(m, "  HSYNC: %08x\n", error->transcoder[i].hsync);
10753                 err_printf(m, "  VTOTAL: %08x\n", error->transcoder[i].vtotal);
10754                 err_printf(m, "  VBLANK: %08x\n", error->transcoder[i].vblank);
10755                 err_printf(m, "  VSYNC: %08x\n", error->transcoder[i].vsync);
10756         }
10757 }