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 typedef struct {
  49         /* given values */
  50         int n;
  51         int m1, m2;
  52         int p1, p2;
  53         /* derived values */
  54         int     dot;
  55         int     vco;
  56         int     m;
  57         int     p;
  58 } intel_clock_t;
  59
  60 typedef struct {
  61         int     min, max;
  62 } intel_range_t;
  63
  64 typedef struct {
  65         int     dot_limit;
  66         int     p2_slow, p2_fast;
  67 } intel_p2_t;
  68
  69 #define INTEL_P2_NUM                  2
  70 typedef struct intel_limit intel_limit_t;
  71 struct intel_limit {
  72         intel_range_t   dot, vco, n, m, m1, m2, p, p1;
  73         intel_p2_t          p2;
  74         /**
  75          * find_pll() - Find the best values for the PLL
  76          * @limit: limits for the PLL
  77          * @crtc: current CRTC
  78          * @target: target frequency in kHz
  79          * @refclk: reference clock frequency in kHz
  80          * @match_clock: if provided, @best_clock P divider must
  81          *               match the P divider from @match_clock
  82          *               used for LVDS downclocking
  83          * @best_clock: best PLL values found
  84          *
  85          * Returns true on success, false on failure.
  86          */
  87         bool (*find_pll)(const intel_limit_t *limit,
  88                          struct drm_crtc *crtc,
  89                          int target, int refclk,
  90                          intel_clock_t *match_clock,
  91                          intel_clock_t *best_clock);
  92 };
  93
  94 /* FDI */
  95 #define IRONLAKE_FDI_FREQ               2700000 /* in kHz for mode->clock */
  96
  97 int
  98 intel_pch_rawclk(struct drm_device *dev)
  99 {
 100         struct drm_i915_private *dev_priv = dev->dev_private;
 101
 102         WARN_ON(!HAS_PCH_SPLIT(dev));
 103
 104         return I915_READ(PCH_RAWCLK_FREQ) & RAWCLK_FREQ_MASK;
 105 }
 106
 107 static bool
 108 intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
 109                     int target, int refclk, intel_clock_t *match_clock,
 110                     intel_clock_t *best_clock);
 111 static bool
 112 intel_g4x_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
 113                         int target, int refclk, intel_clock_t *match_clock,
 114                         intel_clock_t *best_clock);
 115
 116 static bool
 117 intel_find_pll_g4x_dp(const intel_limit_t *, struct drm_crtc *crtc,
 118                       int target, int refclk, intel_clock_t *match_clock,
 119                       intel_clock_t *best_clock);
 120 static bool
 121 intel_find_pll_ironlake_dp(const intel_limit_t *, struct drm_crtc *crtc,
 122                            int target, int refclk, intel_clock_t *match_clock,
 123                            intel_clock_t *best_clock);
 124
 125 static bool
 126 intel_vlv_find_best_pll(const intel_limit_t *limit, struct drm_crtc *crtc,
 127                         int target, int refclk, intel_clock_t *match_clock,
 128                         intel_clock_t *best_clock);
 129
 130 static inline u32 /* units of 100MHz */
 131 intel_fdi_link_freq(struct drm_device *dev)
 132 {
 133         if (IS_GEN5(dev)) {
 134                 struct drm_i915_private *dev_priv = dev->dev_private;
 135                 return (I915_READ(FDI_PLL_BIOS_0) & FDI_PLL_FB_CLOCK_MASK) + 2;
 136         } else
 137                 return 27;
 138 }
 139
 140 static const intel_limit_t intel_limits_i8xx_dvo = {
 141         .dot = { .min = 25000, .max = 350000 },
 142         .vco = { .min = 930000, .max = 1400000 },
 143         .n = { .min = 3, .max = 16 },
 144         .m = { .min = 96, .max = 140 },
 145         .m1 = { .min = 18, .max = 26 },
 146         .m2 = { .min = 6, .max = 16 },
 147         .p = { .min = 4, .max = 128 },
 148         .p1 = { .min = 2, .max = 33 },
 149         .p2 = { .dot_limit = 165000,
 150                 .p2_slow = 4, .p2_fast = 2 },
 151         .find_pll = intel_find_best_PLL,
 152 };
 153
 154 static const intel_limit_t intel_limits_i8xx_lvds = {
 155         .dot = { .min = 25000, .max = 350000 },
 156         .vco = { .min = 930000, .max = 1400000 },
 157         .n = { .min = 3, .max = 16 },
 158         .m = { .min = 96, .max = 140 },
 159         .m1 = { .min = 18, .max = 26 },
 160         .m2 = { .min = 6, .max = 16 },
 161         .p = { .min = 4, .max = 128 },
 162         .p1 = { .min = 1, .max = 6 },
 163         .p2 = { .dot_limit = 165000,
 164                 .p2_slow = 14, .p2_fast = 7 },
 165         .find_pll = intel_find_best_PLL,
 166 };
 167
 168 static const intel_limit_t intel_limits_i9xx_sdvo = {
 169         .dot = { .min = 20000, .max = 400000 },
 170         .vco = { .min = 1400000, .max = 2800000 },
 171         .n = { .min = 1, .max = 6 },
 172         .m = { .min = 70, .max = 120 },
 173         .m1 = { .min = 8, .max = 18 },
 174         .m2 = { .min = 3, .max = 7 },
 175         .p = { .min = 5, .max = 80 },
 176         .p1 = { .min = 1, .max = 8 },
 177         .p2 = { .dot_limit = 200000,
 178                 .p2_slow = 10, .p2_fast = 5 },
 179         .find_pll = intel_find_best_PLL,
 180 };
 181
 182 static const intel_limit_t intel_limits_i9xx_lvds = {
 183         .dot = { .min = 20000, .max = 400000 },
 184         .vco = { .min = 1400000, .max = 2800000 },
 185         .n = { .min = 1, .max = 6 },
 186         .m = { .min = 70, .max = 120 },
 187         .m1 = { .min = 8, .max = 18 },
 188         .m2 = { .min = 3, .max = 7 },
 189         .p = { .min = 7, .max = 98 },
 190         .p1 = { .min = 1, .max = 8 },
 191         .p2 = { .dot_limit = 112000,
 192                 .p2_slow = 14, .p2_fast = 7 },
 193         .find_pll = intel_find_best_PLL,
 194 };
 195
 196
 197 static const intel_limit_t intel_limits_g4x_sdvo = {
 198         .dot = { .min = 25000, .max = 270000 },
 199         .vco = { .min = 1750000, .max = 3500000},
 200         .n = { .min = 1, .max = 4 },
 201         .m = { .min = 104, .max = 138 },
 202         .m1 = { .min = 17, .max = 23 },
 203         .m2 = { .min = 5, .max = 11 },
 204         .p = { .min = 10, .max = 30 },
 205         .p1 = { .min = 1, .max = 3},
 206         .p2 = { .dot_limit = 270000,
 207                 .p2_slow = 10,
 208                 .p2_fast = 10
 209         },
 210         .find_pll = intel_g4x_find_best_PLL,
 211 };
 212
 213 static const intel_limit_t intel_limits_g4x_hdmi = {
 214         .dot = { .min = 22000, .max = 400000 },
 215         .vco = { .min = 1750000, .max = 3500000},
 216         .n = { .min = 1, .max = 4 },
 217         .m = { .min = 104, .max = 138 },
 218         .m1 = { .min = 16, .max = 23 },
 219         .m2 = { .min = 5, .max = 11 },
 220         .p = { .min = 5, .max = 80 },
 221         .p1 = { .min = 1, .max = 8},
 222         .p2 = { .dot_limit = 165000,
 223                 .p2_slow = 10, .p2_fast = 5 },
 224         .find_pll = intel_g4x_find_best_PLL,
 225 };
 226
 227 static const intel_limit_t intel_limits_g4x_single_channel_lvds = {
 228         .dot = { .min = 20000, .max = 115000 },
 229         .vco = { .min = 1750000, .max = 3500000 },
 230         .n = { .min = 1, .max = 3 },
 231         .m = { .min = 104, .max = 138 },
 232         .m1 = { .min = 17, .max = 23 },
 233         .m2 = { .min = 5, .max = 11 },
 234         .p = { .min = 28, .max = 112 },
 235         .p1 = { .min = 2, .max = 8 },
 236         .p2 = { .dot_limit = 0,
 237                 .p2_slow = 14, .p2_fast = 14
 238         },
 239         .find_pll = intel_g4x_find_best_PLL,
 240 };
 241
 242 static const intel_limit_t intel_limits_g4x_dual_channel_lvds = {
 243         .dot = { .min = 80000, .max = 224000 },
 244         .vco = { .min = 1750000, .max = 3500000 },
 245         .n = { .min = 1, .max = 3 },
 246         .m = { .min = 104, .max = 138 },
 247         .m1 = { .min = 17, .max = 23 },
 248         .m2 = { .min = 5, .max = 11 },
 249         .p = { .min = 14, .max = 42 },
 250         .p1 = { .min = 2, .max = 6 },
 251         .p2 = { .dot_limit = 0,
 252                 .p2_slow = 7, .p2_fast = 7
 253         },
 254         .find_pll = intel_g4x_find_best_PLL,
 255 };
 256
 257 static const intel_limit_t intel_limits_g4x_display_port = {
 258         .dot = { .min = 161670, .max = 227000 },
 259         .vco = { .min = 1750000, .max = 3500000},
 260         .n = { .min = 1, .max = 2 },
 261         .m = { .min = 97, .max = 108 },
 262         .m1 = { .min = 0x10, .max = 0x12 },
 263         .m2 = { .min = 0x05, .max = 0x06 },
 264         .p = { .min = 10, .max = 20 },
 265         .p1 = { .min = 1, .max = 2},
 266         .p2 = { .dot_limit = 0,
 267                 .p2_slow = 10, .p2_fast = 10 },
 268         .find_pll = intel_find_pll_g4x_dp,
 269 };
 270
 271 static const intel_limit_t intel_limits_pineview_sdvo = {
 272         .dot = { .min = 20000, .max = 400000},
 273         .vco = { .min = 1700000, .max = 3500000 },
 274         /* Pineview's Ncounter is a ring counter */
 275         .n = { .min = 3, .max = 6 },
 276         .m = { .min = 2, .max = 256 },
 277         /* Pineview only has one combined m divider, which we treat as m2. */
 278         .m1 = { .min = 0, .max = 0 },
 279         .m2 = { .min = 0, .max = 254 },
 280         .p = { .min = 5, .max = 80 },
 281         .p1 = { .min = 1, .max = 8 },
 282         .p2 = { .dot_limit = 200000,
 283                 .p2_slow = 10, .p2_fast = 5 },
 284         .find_pll = intel_find_best_PLL,
 285 };
 286
 287 static const intel_limit_t intel_limits_pineview_lvds = {
 288         .dot = { .min = 20000, .max = 400000 },
 289         .vco = { .min = 1700000, .max = 3500000 },
 290         .n = { .min = 3, .max = 6 },
 291         .m = { .min = 2, .max = 256 },
 292         .m1 = { .min = 0, .max = 0 },
 293         .m2 = { .min = 0, .max = 254 },
 294         .p = { .min = 7, .max = 112 },
 295         .p1 = { .min = 1, .max = 8 },
 296         .p2 = { .dot_limit = 112000,
 297                 .p2_slow = 14, .p2_fast = 14 },
 298         .find_pll = intel_find_best_PLL,
 299 };
 300
 301 /* Ironlake / Sandybridge
 302  *
 303  * We calculate clock using (register_value + 2) for N/M1/M2, so here
 304  * the range value for them is (actual_value - 2).
 305  */
 306 static const intel_limit_t intel_limits_ironlake_dac = {
 307         .dot = { .min = 25000, .max = 350000 },
 308         .vco = { .min = 1760000, .max = 3510000 },
 309         .n = { .min = 1, .max = 5 },
 310         .m = { .min = 79, .max = 127 },
 311         .m1 = { .min = 12, .max = 22 },
 312         .m2 = { .min = 5, .max = 9 },
 313         .p = { .min = 5, .max = 80 },
 314         .p1 = { .min = 1, .max = 8 },
 315         .p2 = { .dot_limit = 225000,
 316                 .p2_slow = 10, .p2_fast = 5 },
 317         .find_pll = intel_g4x_find_best_PLL,
 318 };
 319
 320 static const intel_limit_t intel_limits_ironlake_single_lvds = {
 321         .dot = { .min = 25000, .max = 350000 },
 322         .vco = { .min = 1760000, .max = 3510000 },
 323         .n = { .min = 1, .max = 3 },
 324         .m = { .min = 79, .max = 118 },
 325         .m1 = { .min = 12, .max = 22 },
 326         .m2 = { .min = 5, .max = 9 },
 327         .p = { .min = 28, .max = 112 },
 328         .p1 = { .min = 2, .max = 8 },
 329         .p2 = { .dot_limit = 225000,
 330                 .p2_slow = 14, .p2_fast = 14 },
 331         .find_pll = intel_g4x_find_best_PLL,
 332 };
 333
 334 static const intel_limit_t intel_limits_ironlake_dual_lvds = {
 335         .dot = { .min = 25000, .max = 350000 },
 336         .vco = { .min = 1760000, .max = 3510000 },
 337         .n = { .min = 1, .max = 3 },
 338         .m = { .min = 79, .max = 127 },
 339         .m1 = { .min = 12, .max = 22 },
 340         .m2 = { .min = 5, .max = 9 },
 341         .p = { .min = 14, .max = 56 },
 342         .p1 = { .min = 2, .max = 8 },
 343         .p2 = { .dot_limit = 225000,
 344                 .p2_slow = 7, .p2_fast = 7 },
 345         .find_pll = intel_g4x_find_best_PLL,
 346 };
 347
 348 /* LVDS 100mhz refclk limits. */
 349 static const intel_limit_t intel_limits_ironlake_single_lvds_100m = {
 350         .dot = { .min = 25000, .max = 350000 },
 351         .vco = { .min = 1760000, .max = 3510000 },
 352         .n = { .min = 1, .max = 2 },
 353         .m = { .min = 79, .max = 126 },
 354         .m1 = { .min = 12, .max = 22 },
 355         .m2 = { .min = 5, .max = 9 },
 356         .p = { .min = 28, .max = 112 },
 357         .p1 = { .min = 2, .max = 8 },
 358         .p2 = { .dot_limit = 225000,
 359                 .p2_slow = 14, .p2_fast = 14 },
 360         .find_pll = intel_g4x_find_best_PLL,
 361 };
 362
 363 static const intel_limit_t intel_limits_ironlake_dual_lvds_100m = {
 364         .dot = { .min = 25000, .max = 350000 },
 365         .vco = { .min = 1760000, .max = 3510000 },
 366         .n = { .min = 1, .max = 3 },
 367         .m = { .min = 79, .max = 126 },
 368         .m1 = { .min = 12, .max = 22 },
 369         .m2 = { .min = 5, .max = 9 },
 370         .p = { .min = 14, .max = 42 },
 371         .p1 = { .min = 2, .max = 6 },
 372         .p2 = { .dot_limit = 225000,
 373                 .p2_slow = 7, .p2_fast = 7 },
 374         .find_pll = intel_g4x_find_best_PLL,
 375 };
 376
 377 static const intel_limit_t intel_limits_ironlake_display_port = {
 378         .dot = { .min = 25000, .max = 350000 },
 379         .vco = { .min = 1760000, .max = 3510000},
 380         .n = { .min = 1, .max = 2 },
 381         .m = { .min = 81, .max = 90 },
 382         .m1 = { .min = 12, .max = 22 },
 383         .m2 = { .min = 5, .max = 9 },
 384         .p = { .min = 10, .max = 20 },
 385         .p1 = { .min = 1, .max = 2},
 386         .p2 = { .dot_limit = 0,
 387                 .p2_slow = 10, .p2_fast = 10 },
 388         .find_pll = intel_find_pll_ironlake_dp,
 389 };
 390
 391 static const intel_limit_t intel_limits_vlv_dac = {
 392         .dot = { .min = 25000, .max = 270000 },
 393         .vco = { .min = 4000000, .max = 6000000 },
 394         .n = { .min = 1, .max = 7 },
 395         .m = { .min = 22, .max = 450 }, /* guess */
 396         .m1 = { .min = 2, .max = 3 },
 397         .m2 = { .min = 11, .max = 156 },
 398         .p = { .min = 10, .max = 30 },
 399         .p1 = { .min = 2, .max = 3 },
 400         .p2 = { .dot_limit = 270000,
 401                 .p2_slow = 2, .p2_fast = 20 },
 402         .find_pll = intel_vlv_find_best_pll,
 403 };
 404
 405 static const intel_limit_t intel_limits_vlv_hdmi = {
 406         .dot = { .min = 20000, .max = 165000 },
 407         .vco = { .min = 4000000, .max = 5994000},
 408         .n = { .min = 1, .max = 7 },
 409         .m = { .min = 60, .max = 300 }, /* guess */
 410         .m1 = { .min = 2, .max = 3 },
 411         .m2 = { .min = 11, .max = 156 },
 412         .p = { .min = 10, .max = 30 },
 413         .p1 = { .min = 2, .max = 3 },
 414         .p2 = { .dot_limit = 270000,
 415                 .p2_slow = 2, .p2_fast = 20 },
 416         .find_pll = intel_vlv_find_best_pll,
 417 };
 418
 419 static const intel_limit_t intel_limits_vlv_dp = {
 420         .dot = { .min = 25000, .max = 270000 },
 421         .vco = { .min = 4000000, .max = 6000000 },
 422         .n = { .min = 1, .max = 7 },
 423         .m = { .min = 22, .max = 450 },
 424         .m1 = { .min = 2, .max = 3 },
 425         .m2 = { .min = 11, .max = 156 },
 426         .p = { .min = 10, .max = 30 },
 427         .p1 = { .min = 2, .max = 3 },
 428         .p2 = { .dot_limit = 270000,
 429                 .p2_slow = 2, .p2_fast = 20 },
 430         .find_pll = intel_vlv_find_best_pll,
 431 };
 432
 433 u32 intel_dpio_read(struct drm_i915_private *dev_priv, int reg)
 434 {
 435         WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
 436
 437         if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
 438                 DRM_ERROR("DPIO idle wait timed out\n");
 439                 return 0;
 440         }
 441
 442         I915_WRITE(DPIO_REG, reg);
 443         I915_WRITE(DPIO_PKT, DPIO_RID | DPIO_OP_READ | DPIO_PORTID |
 444                    DPIO_BYTE);
 445         if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
 446                 DRM_ERROR("DPIO read wait timed out\n");
 447                 return 0;
 448         }
 449
 450         return I915_READ(DPIO_DATA);
 451 }
 452
 453 static void intel_dpio_write(struct drm_i915_private *dev_priv, int reg,
 454                              u32 val)
 455 {
 456         WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
 457
 458         if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
 459                 DRM_ERROR("DPIO idle wait timed out\n");
 460                 return;
 461         }
 462
 463         I915_WRITE(DPIO_DATA, val);
 464         I915_WRITE(DPIO_REG, reg);
 465         I915_WRITE(DPIO_PKT, DPIO_RID | DPIO_OP_WRITE | DPIO_PORTID |
 466                    DPIO_BYTE);
 467         if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100))
 468                 DRM_ERROR("DPIO write wait timed out\n");
 469 }
 470
 471 static void vlv_init_dpio(struct drm_device *dev)
 472 {
 473         struct drm_i915_private *dev_priv = dev->dev_private;
 474
 475         /* Reset the DPIO config */
 476         I915_WRITE(DPIO_CTL, 0);
 477         POSTING_READ(DPIO_CTL);
 478         I915_WRITE(DPIO_CTL, 1);
 479         POSTING_READ(DPIO_CTL);
 480 }
 481
 482 static const intel_limit_t *intel_ironlake_limit(struct drm_crtc *crtc,
 483                                                 int refclk)
 484 {
 485         struct drm_device *dev = crtc->dev;
 486         const intel_limit_t *limit;
 487
 488         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 489                 if (intel_is_dual_link_lvds(dev)) {
 490                         if (refclk == 100000)
 491                                 limit = &intel_limits_ironlake_dual_lvds_100m;
 492                         else
 493                                 limit = &intel_limits_ironlake_dual_lvds;
 494                 } else {
 495                         if (refclk == 100000)
 496                                 limit = &intel_limits_ironlake_single_lvds_100m;
 497                         else
 498                                 limit = &intel_limits_ironlake_single_lvds;
 499                 }
 500         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT) ||
 501                    intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))
 502                 limit = &intel_limits_ironlake_display_port;
 503         else
 504                 limit = &intel_limits_ironlake_dac;
 505
 506         return limit;
 507 }
 508
 509 static const intel_limit_t *intel_g4x_limit(struct drm_crtc *crtc)
 510 {
 511         struct drm_device *dev = crtc->dev;
 512         const intel_limit_t *limit;
 513
 514         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 515                 if (intel_is_dual_link_lvds(dev))
 516                         limit = &intel_limits_g4x_dual_channel_lvds;
 517                 else
 518                         limit = &intel_limits_g4x_single_channel_lvds;
 519         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI) ||
 520                    intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG)) {
 521                 limit = &intel_limits_g4x_hdmi;
 522         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO)) {
 523                 limit = &intel_limits_g4x_sdvo;
 524         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
 525                 limit = &intel_limits_g4x_display_port;
 526         } else /* The option is for other outputs */
 527                 limit = &intel_limits_i9xx_sdvo;
 528
 529         return limit;
 530 }
 531
 532 static const intel_limit_t *intel_limit(struct drm_crtc *crtc, int refclk)
 533 {
 534         struct drm_device *dev = crtc->dev;
 535         const intel_limit_t *limit;
 536
 537         if (HAS_PCH_SPLIT(dev))
 538                 limit = intel_ironlake_limit(crtc, refclk);
 539         else if (IS_G4X(dev)) {
 540                 limit = intel_g4x_limit(crtc);
 541         } else if (IS_PINEVIEW(dev)) {
 542                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
 543                         limit = &intel_limits_pineview_lvds;
 544                 else
 545                         limit = &intel_limits_pineview_sdvo;
 546         } else if (IS_VALLEYVIEW(dev)) {
 547                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG))
 548                         limit = &intel_limits_vlv_dac;
 549                 else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI))
 550                         limit = &intel_limits_vlv_hdmi;
 551                 else
 552                         limit = &intel_limits_vlv_dp;
 553         } else if (!IS_GEN2(dev)) {
 554                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
 555                         limit = &intel_limits_i9xx_lvds;
 556                 else
 557                         limit = &intel_limits_i9xx_sdvo;
 558         } else {
 559                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
 560                         limit = &intel_limits_i8xx_lvds;
 561                 else
 562                         limit = &intel_limits_i8xx_dvo;
 563         }
 564         return limit;
 565 }
 566
 567 /* m1 is reserved as 0 in Pineview, n is a ring counter */
 568 static void pineview_clock(int refclk, intel_clock_t *clock)
 569 {
 570         clock->m = clock->m2 + 2;
 571         clock->p = clock->p1 * clock->p2;
 572         clock->vco = refclk * clock->m / clock->n;
 573         clock->dot = clock->vco / clock->p;
 574 }
 575
 576 static void intel_clock(struct drm_device *dev, int refclk, intel_clock_t *clock)
 577 {
 578         if (IS_PINEVIEW(dev)) {
 579                 pineview_clock(refclk, clock);
 580                 return;
 581         }
 582         clock->m = 5 * (clock->m1 + 2) + (clock->m2 + 2);
 583         clock->p = clock->p1 * clock->p2;
 584         clock->vco = refclk * clock->m / (clock->n + 2);
 585         clock->dot = clock->vco / clock->p;
 586 }
 587
 588 /**
 589  * Returns whether any output on the specified pipe is of the specified type
 590  */
 591 bool intel_pipe_has_type(struct drm_crtc *crtc, int type)
 592 {
 593         struct drm_device *dev = crtc->dev;
 594         struct intel_encoder *encoder;
 595
 596         for_each_encoder_on_crtc(dev, crtc, encoder)
 597                 if (encoder->type == type)
 598                         return true;
 599
 600         return false;
 601 }
 602
 603 #define INTELPllInvalid(s)   do { /* DRM_DEBUG(s); */ return false; } while (0)
 604 /**
 605  * Returns whether the given set of divisors are valid for a given refclk with
 606  * the given connectors.
 607  */
 608
 609 static bool intel_PLL_is_valid(struct drm_device *dev,
 610                                const intel_limit_t *limit,
 611                                const intel_clock_t *clock)
 612 {
 613         if (clock->p1  < limit->p1.min  || limit->p1.max  < clock->p1)
 614                 INTELPllInvalid("p1 out of range\n");
 615         if (clock->p   < limit->p.min   || limit->p.max   < clock->p)
 616                 INTELPllInvalid("p out of range\n");
 617         if (clock->m2  < limit->m2.min  || limit->m2.max  < clock->m2)
 618                 INTELPllInvalid("m2 out of range\n");
 619         if (clock->m1  < limit->m1.min  || limit->m1.max  < clock->m1)
 620                 INTELPllInvalid("m1 out of range\n");
 621         if (clock->m1 <= clock->m2 && !IS_PINEVIEW(dev))
 622                 INTELPllInvalid("m1 <= m2\n");
 623         if (clock->m   < limit->m.min   || limit->m.max   < clock->m)
 624                 INTELPllInvalid("m out of range\n");
 625         if (clock->n   < limit->n.min   || limit->n.max   < clock->n)
 626                 INTELPllInvalid("n out of range\n");
 627         if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
 628                 INTELPllInvalid("vco out of range\n");
 629         /* XXX: We may need to be checking "Dot clock" depending on the multiplier,
 630          * connector, etc., rather than just a single range.
 631          */
 632         if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
 633                 INTELPllInvalid("dot out of range\n");
 634
 635         return true;
 636 }
 637
 638 static bool
 639 intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
 640                     int target, int refclk, intel_clock_t *match_clock,
 641                     intel_clock_t *best_clock)
 642
 643 {
 644         struct drm_device *dev = crtc->dev;
 645         intel_clock_t clock;
 646         int err = target;
 647
 648         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 649                 /*
 650                  * For LVDS just rely on its current settings for dual-channel.
 651                  * We haven't figured out how to reliably set up different
 652                  * single/dual channel state, if we even can.
 653                  */
 654                 if (intel_is_dual_link_lvds(dev))
 655                         clock.p2 = limit->p2.p2_fast;
 656                 else
 657                         clock.p2 = limit->p2.p2_slow;
 658         } else {
 659                 if (target < limit->p2.dot_limit)
 660                         clock.p2 = limit->p2.p2_slow;
 661                 else
 662                         clock.p2 = limit->p2.p2_fast;
 663         }
 664
 665         memset(best_clock, 0, sizeof(*best_clock));
 666
 667         for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max;
 668              clock.m1++) {
 669                 for (clock.m2 = limit->m2.min;
 670                      clock.m2 <= limit->m2.max; clock.m2++) {
 671                         /* m1 is always 0 in Pineview */
 672                         if (clock.m2 >= clock.m1 && !IS_PINEVIEW(dev))
 673                                 break;
 674                         for (clock.n = limit->n.min;
 675                              clock.n <= limit->n.max; clock.n++) {
 676                                 for (clock.p1 = limit->p1.min;
 677                                         clock.p1 <= limit->p1.max; clock.p1++) {
 678                                         int this_err;
 679
 680                                         intel_clock(dev, refclk, &clock);
 681                                         if (!intel_PLL_is_valid(dev, limit,
 682                                                                 &clock))
 683                                                 continue;
 684                                         if (match_clock &&
 685                                             clock.p != match_clock->p)
 686                                                 continue;
 687
 688                                         this_err = abs(clock.dot - target);
 689                                         if (this_err < err) {
 690                                                 *best_clock = clock;
 691                                                 err = this_err;
 692                                         }
 693                                 }
 694                         }
 695                 }
 696         }
 697
 698         return (err != target);
 699 }
 700
 701 static bool
 702 intel_g4x_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
 703                         int target, int refclk, intel_clock_t *match_clock,
 704                         intel_clock_t *best_clock)
 705 {
 706         struct drm_device *dev = crtc->dev;
 707         intel_clock_t clock;
 708         int max_n;
 709         bool found;
 710         /* approximately equals target * 0.00585 */
 711         int err_most = (target >> 8) + (target >> 9);
 712         found = false;
 713
 714         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
 715                 int lvds_reg;
 716
 717                 if (HAS_PCH_SPLIT(dev))
 718                         lvds_reg = PCH_LVDS;
 719                 else
 720                         lvds_reg = LVDS;
 721                 if (intel_is_dual_link_lvds(dev))
 722                         clock.p2 = limit->p2.p2_fast;
 723                 else
 724                         clock.p2 = limit->p2.p2_slow;
 725         } else {
 726                 if (target < limit->p2.dot_limit)
 727                         clock.p2 = limit->p2.p2_slow;
 728                 else
 729                         clock.p2 = limit->p2.p2_fast;
 730         }
 731
 732         memset(best_clock, 0, sizeof(*best_clock));
 733         max_n = limit->n.max;
 734         /* based on hardware requirement, prefer smaller n to precision */
 735         for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
 736                 /* based on hardware requirement, prefere larger m1,m2 */
 737                 for (clock.m1 = limit->m1.max;
 738                      clock.m1 >= limit->m1.min; clock.m1--) {
 739                         for (clock.m2 = limit->m2.max;
 740                              clock.m2 >= limit->m2.min; clock.m2--) {
 741                                 for (clock.p1 = limit->p1.max;
 742                                      clock.p1 >= limit->p1.min; clock.p1--) {
 743                                         int this_err;
 744
 745                                         intel_clock(dev, refclk, &clock);
 746                                         if (!intel_PLL_is_valid(dev, limit,
 747                                                                 &clock))
 748                                                 continue;
 749                                         if (match_clock &&
 750                                             clock.p != match_clock->p)
 751                                                 continue;
 752
 753                                         this_err = abs(clock.dot - target);
 754                                         if (this_err < err_most) {
 755                                                 *best_clock = clock;
 756                                                 err_most = this_err;
 757                                                 max_n = clock.n;
 758                                                 found = true;
 759                                         }
 760                                 }
 761                         }
 762                 }
 763         }
 764         return found;
 765 }
 766
 767 static bool
 768 intel_find_pll_ironlake_dp(const intel_limit_t *limit, struct drm_crtc *crtc,
 769                            int target, int refclk, intel_clock_t *match_clock,
 770                            intel_clock_t *best_clock)
 771 {
 772         struct drm_device *dev = crtc->dev;
 773         intel_clock_t clock;
 774
 775         if (target < 200000) {
 776                 clock.n = 1;
 777                 clock.p1 = 2;
 778                 clock.p2 = 10;
 779                 clock.m1 = 12;
 780                 clock.m2 = 9;
 781         } else {
 782                 clock.n = 2;
 783                 clock.p1 = 1;
 784                 clock.p2 = 10;
 785                 clock.m1 = 14;
 786                 clock.m2 = 8;
 787         }
 788         intel_clock(dev, refclk, &clock);
 789         memcpy(best_clock, &clock, sizeof(intel_clock_t));
 790         return true;
 791 }
 792
 793 /* DisplayPort has only two frequencies, 162MHz and 270MHz */
 794 static bool
 795 intel_find_pll_g4x_dp(const intel_limit_t *limit, struct drm_crtc *crtc,
 796                       int target, int refclk, intel_clock_t *match_clock,
 797                       intel_clock_t *best_clock)
 798 {
 799         intel_clock_t clock;
 800         if (target < 200000) {
 801                 clock.p1 = 2;
 802                 clock.p2 = 10;
 803                 clock.n = 2;
 804                 clock.m1 = 23;
 805                 clock.m2 = 8;
 806         } else {
 807                 clock.p1 = 1;
 808                 clock.p2 = 10;
 809                 clock.n = 1;
 810                 clock.m1 = 14;
 811                 clock.m2 = 2;
 812         }
 813         clock.m = 5 * (clock.m1 + 2) + (clock.m2 + 2);
 814         clock.p = (clock.p1 * clock.p2);
 815         clock.dot = 96000 * clock.m / (clock.n + 2) / clock.p;
 816         clock.vco = 0;
 817         memcpy(best_clock, &clock, sizeof(intel_clock_t));
 818         return true;
 819 }
 820 static bool
 821 intel_vlv_find_best_pll(const intel_limit_t *limit, struct drm_crtc *crtc,
 822                         int target, int refclk, intel_clock_t *match_clock,
 823                         intel_clock_t *best_clock)
 824 {
 825         u32 p1, p2, m1, m2, vco, bestn, bestm1, bestm2, bestp1, bestp2;
 826         u32 m, n, fastclk;
 827         u32 updrate, minupdate, fracbits, p;
 828         unsigned long bestppm, ppm, absppm;
 829         int dotclk, flag;
 830
 831         flag = 0;
 832         dotclk = target * 1000;
 833         bestppm = 1000000;
 834         ppm = absppm = 0;
 835         fastclk = dotclk / (2*100);
 836         updrate = 0;
 837         minupdate = 19200;
 838         fracbits = 1;
 839         n = p = p1 = p2 = m = m1 = m2 = vco = bestn = 0;
 840         bestm1 = bestm2 = bestp1 = bestp2 = 0;
 841
 842         /* based on hardware requirement, prefer smaller n to precision */
 843         for (n = limit->n.min; n <= ((refclk) / minupdate); n++) {
 844                 updrate = refclk / n;
 845                 for (p1 = limit->p1.max; p1 > limit->p1.min; p1--) {
 846                         for (p2 = limit->p2.p2_fast+1; p2 > 0; p2--) {
 847                                 if (p2 > 10)
 848                                         p2 = p2 - 1;
 849                                 p = p1 * p2;
 850                                 /* based on hardware requirement, prefer bigger m1,m2 values */
 851                                 for (m1 = limit->m1.min; m1 <= limit->m1.max; m1++) {
 852                                         m2 = (((2*(fastclk * p * n / m1 )) +
 853                                                refclk) / (2*refclk));
 854                                         m = m1 * m2;
 855                                         vco = updrate * m;
 856                                         if (vco >= limit->vco.min && vco < limit->vco.max) {
 857                                                 ppm = 1000000 * ((vco / p) - fastclk) / fastclk;
 858                                                 absppm = (ppm > 0) ? ppm : (-ppm);
 859                                                 if (absppm < 100 && ((p1 * p2) > (bestp1 * bestp2))) {
 860                                                         bestppm = 0;
 861                                                         flag = 1;
 862                                                 }
 863                                                 if (absppm < bestppm - 10) {
 864                                                         bestppm = absppm;
 865                                                         flag = 1;
 866                                                 }
 867                                                 if (flag) {
 868                                                         bestn = n;
 869                                                         bestm1 = m1;
 870                                                         bestm2 = m2;
 871                                                         bestp1 = p1;
 872                                                         bestp2 = p2;
 873                                                         flag = 0;
 874                                                 }
 875                                         }
 876                                 }
 877                         }
 878                 }
 879         }
 880         best_clock->n = bestn;
 881         best_clock->m1 = bestm1;
 882         best_clock->m2 = bestm2;
 883         best_clock->p1 = bestp1;
 884         best_clock->p2 = bestp2;
 885
 886         return true;
 887 }
 888
 889 enum transcoder intel_pipe_to_cpu_transcoder(struct drm_i915_private *dev_priv,
 890                                              enum pipe pipe)
 891 {
 892         struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
 893         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 894
 895         return intel_crtc->config.cpu_transcoder;
 896 }
 897
 898 static void ironlake_wait_for_vblank(struct drm_device *dev, int pipe)
 899 {
 900         struct drm_i915_private *dev_priv = dev->dev_private;
 901         u32 frame, frame_reg = PIPEFRAME(pipe);
 902
 903         frame = I915_READ(frame_reg);
 904
 905         if (wait_for(I915_READ_NOTRACE(frame_reg) != frame, 50))
 906                 DRM_DEBUG_KMS("vblank wait timed out\n");
 907 }
 908
 909 /**
 910  * intel_wait_for_vblank - wait for vblank on a given pipe
 911  * @dev: drm device
 912  * @pipe: pipe to wait for
 913  *
 914  * Wait for vblank to occur on a given pipe.  Needed for various bits of
 915  * mode setting code.
 916  */
 917 void intel_wait_for_vblank(struct drm_device *dev, int pipe)
 918 {
 919         struct drm_i915_private *dev_priv = dev->dev_private;
 920         int pipestat_reg = PIPESTAT(pipe);
 921
 922         if (INTEL_INFO(dev)->gen >= 5) {
 923                 ironlake_wait_for_vblank(dev, pipe);
 924                 return;
 925         }
 926
 927         /* Clear existing vblank status. Note this will clear any other
 928          * sticky status fields as well.
 929          *
 930          * This races with i915_driver_irq_handler() with the result
 931          * that either function could miss a vblank event.  Here it is not
 932          * fatal, as we will either wait upon the next vblank interrupt or
 933          * timeout.  Generally speaking intel_wait_for_vblank() is only
 934          * called during modeset at which time the GPU should be idle and
 935          * should *not* be performing page flips and thus not waiting on
 936          * vblanks...
 937          * Currently, the result of us stealing a vblank from the irq
 938          * handler is that a single frame will be skipped during swapbuffers.
 939          */
 940         I915_WRITE(pipestat_reg,
 941                    I915_READ(pipestat_reg) | PIPE_VBLANK_INTERRUPT_STATUS);
 942
 943         /* Wait for vblank interrupt bit to set */
 944         if (wait_for(I915_READ(pipestat_reg) &
 945                      PIPE_VBLANK_INTERRUPT_STATUS,
 946                      50))
 947                 DRM_DEBUG_KMS("vblank wait timed out\n");
 948 }
 949
 950 /*
 951  * intel_wait_for_pipe_off - wait for pipe to turn off
 952  * @dev: drm device
 953  * @pipe: pipe to wait for
 954  *
 955  * After disabling a pipe, we can't wait for vblank in the usual way,
 956  * spinning on the vblank interrupt status bit, since we won't actually
 957  * see an interrupt when the pipe is disabled.
 958  *
 959  * On Gen4 and above:
 960  *   wait for the pipe register state bit to turn off
 961  *
 962  * Otherwise:
 963  *   wait for the display line value to settle (it usually
 964  *   ends up stopping at the start of the next frame).
 965  *
 966  */
 967 void intel_wait_for_pipe_off(struct drm_device *dev, int pipe)
 968 {
 969         struct drm_i915_private *dev_priv = dev->dev_private;
 970         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
 971                                                                       pipe);
 972
 973         if (INTEL_INFO(dev)->gen >= 4) {
 974                 int reg = PIPECONF(cpu_transcoder);
 975
 976                 /* Wait for the Pipe State to go off */
 977                 if (wait_for((I915_READ(reg) & I965_PIPECONF_ACTIVE) == 0,
 978                              100))
 979                         WARN(1, "pipe_off wait timed out\n");
 980         } else {
 981                 u32 last_line, line_mask;
 982                 int reg = PIPEDSL(pipe);
 983                 unsigned long timeout = jiffies + msecs_to_jiffies(100);
 984
 985                 if (IS_GEN2(dev))
 986                         line_mask = DSL_LINEMASK_GEN2;
 987                 else
 988                         line_mask = DSL_LINEMASK_GEN3;
 989
 990                 /* Wait for the display line to settle */
 991                 do {
 992                         last_line = I915_READ(reg) & line_mask;
 993                         mdelay(5);
 994                 } while (((I915_READ(reg) & line_mask) != last_line) &&
 995                          time_after(timeout, jiffies));
 996                 if (time_after(jiffies, timeout))
 997                         WARN(1, "pipe_off wait timed out\n");
 998         }
 999 }
1000
1001 /*
1002  * ibx_digital_port_connected - is the specified port connected?
1003  * @dev_priv: i915 private structure
1004  * @port: the port to test
1005  *
1006  * Returns true if @port is connected, false otherwise.
1007  */
1008 bool ibx_digital_port_connected(struct drm_i915_private *dev_priv,
1009                                 struct intel_digital_port *port)
1010 {
1011         u32 bit;
1012
1013         if (HAS_PCH_IBX(dev_priv->dev)) {
1014                 switch(port->port) {
1015                 case PORT_B:
1016                         bit = SDE_PORTB_HOTPLUG;
1017                         break;
1018                 case PORT_C:
1019                         bit = SDE_PORTC_HOTPLUG;
1020                         break;
1021                 case PORT_D:
1022                         bit = SDE_PORTD_HOTPLUG;
1023                         break;
1024                 default:
1025                         return true;
1026                 }
1027         } else {
1028                 switch(port->port) {
1029                 case PORT_B:
1030                         bit = SDE_PORTB_HOTPLUG_CPT;
1031                         break;
1032                 case PORT_C:
1033                         bit = SDE_PORTC_HOTPLUG_CPT;
1034                         break;
1035                 case PORT_D:
1036                         bit = SDE_PORTD_HOTPLUG_CPT;
1037                         break;
1038                 default:
1039                         return true;
1040                 }
1041         }
1042
1043         return I915_READ(SDEISR) & bit;
1044 }
1045
1046 static const char *state_string(bool enabled)
1047 {
1048         return enabled ? "on" : "off";
1049 }
1050
1051 /* Only for pre-ILK configs */
1052 static void assert_pll(struct drm_i915_private *dev_priv,
1053                        enum pipe pipe, bool state)
1054 {
1055         int reg;
1056         u32 val;
1057         bool cur_state;
1058
1059         reg = DPLL(pipe);
1060         val = I915_READ(reg);
1061         cur_state = !!(val & DPLL_VCO_ENABLE);
1062         WARN(cur_state != state,
1063              "PLL state assertion failure (expected %s, current %s)\n",
1064              state_string(state), state_string(cur_state));
1065 }
1066 #define assert_pll_enabled(d, p) assert_pll(d, p, true)
1067 #define assert_pll_disabled(d, p) assert_pll(d, p, false)
1068
1069 /* For ILK+ */
1070 static void assert_pch_pll(struct drm_i915_private *dev_priv,
1071                            struct intel_pch_pll *pll,
1072                            struct intel_crtc *crtc,
1073                            bool state)
1074 {
1075         u32 val;
1076         bool cur_state;
1077
1078         if (HAS_PCH_LPT(dev_priv->dev)) {
1079                 DRM_DEBUG_DRIVER("LPT detected: skipping PCH PLL test\n");
1080                 return;
1081         }
1082
1083         if (WARN (!pll,
1084                   "asserting PCH PLL %s with no PLL\n", state_string(state)))
1085                 return;
1086
1087         val = I915_READ(pll->pll_reg);
1088         cur_state = !!(val & DPLL_VCO_ENABLE);
1089         WARN(cur_state != state,
1090              "PCH PLL state for reg %x assertion failure (expected %s, current %s), val=%08x\n",
1091              pll->pll_reg, state_string(state), state_string(cur_state), val);
1092
1093         /* Make sure the selected PLL is correctly attached to the transcoder */
1094         if (crtc && HAS_PCH_CPT(dev_priv->dev)) {
1095                 u32 pch_dpll;
1096
1097                 pch_dpll = I915_READ(PCH_DPLL_SEL);
1098                 cur_state = pll->pll_reg == _PCH_DPLL_B;
1099                 if (!WARN(((pch_dpll >> (4 * crtc->pipe)) & 1) != cur_state,
1100                           "PLL[%d] not attached to this transcoder %d: %08x\n",
1101                           cur_state, crtc->pipe, pch_dpll)) {
1102                         cur_state = !!(val >> (4*crtc->pipe + 3));
1103                         WARN(cur_state != state,
1104                              "PLL[%d] not %s on this transcoder %d: %08x\n",
1105                              pll->pll_reg == _PCH_DPLL_B,
1106                              state_string(state),
1107                              crtc->pipe,
1108                              val);
1109                 }
1110         }
1111 }
1112 #define assert_pch_pll_enabled(d, p, c) assert_pch_pll(d, p, c, true)
1113 #define assert_pch_pll_disabled(d, p, c) assert_pch_pll(d, p, c, false)
1114
1115 static void assert_fdi_tx(struct drm_i915_private *dev_priv,
1116                           enum pipe pipe, bool state)
1117 {
1118         int reg;
1119         u32 val;
1120         bool cur_state;
1121         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
1122                                                                       pipe);
1123
1124         if (HAS_DDI(dev_priv->dev)) {
1125                 /* DDI does not have a specific FDI_TX register */
1126                 reg = TRANS_DDI_FUNC_CTL(cpu_transcoder);
1127                 val = I915_READ(reg);
1128                 cur_state = !!(val & TRANS_DDI_FUNC_ENABLE);
1129         } else {
1130                 reg = FDI_TX_CTL(pipe);
1131                 val = I915_READ(reg);
1132                 cur_state = !!(val & FDI_TX_ENABLE);
1133         }
1134         WARN(cur_state != state,
1135              "FDI TX state assertion failure (expected %s, current %s)\n",
1136              state_string(state), state_string(cur_state));
1137 }
1138 #define assert_fdi_tx_enabled(d, p) assert_fdi_tx(d, p, true)
1139 #define assert_fdi_tx_disabled(d, p) assert_fdi_tx(d, p, false)
1140
1141 static void assert_fdi_rx(struct drm_i915_private *dev_priv,
1142                           enum pipe pipe, bool state)
1143 {
1144         int reg;
1145         u32 val;
1146         bool cur_state;
1147
1148         reg = FDI_RX_CTL(pipe);
1149         val = I915_READ(reg);
1150         cur_state = !!(val & FDI_RX_ENABLE);
1151         WARN(cur_state != state,
1152              "FDI RX state assertion failure (expected %s, current %s)\n",
1153              state_string(state), state_string(cur_state));
1154 }
1155 #define assert_fdi_rx_enabled(d, p) assert_fdi_rx(d, p, true)
1156 #define assert_fdi_rx_disabled(d, p) assert_fdi_rx(d, p, false)
1157
1158 static void assert_fdi_tx_pll_enabled(struct drm_i915_private *dev_priv,
1159                                       enum pipe pipe)
1160 {
1161         int reg;
1162         u32 val;
1163
1164         /* ILK FDI PLL is always enabled */
1165         if (dev_priv->info->gen == 5)
1166                 return;
1167
1168         /* On Haswell, DDI ports are responsible for the FDI PLL setup */
1169         if (HAS_DDI(dev_priv->dev))
1170                 return;
1171
1172         reg = FDI_TX_CTL(pipe);
1173         val = I915_READ(reg);
1174         WARN(!(val & FDI_TX_PLL_ENABLE), "FDI TX PLL assertion failure, should be active but is disabled\n");
1175 }
1176
1177 static void assert_fdi_rx_pll_enabled(struct drm_i915_private *dev_priv,
1178                                       enum pipe pipe)
1179 {
1180         int reg;
1181         u32 val;
1182
1183         reg = FDI_RX_CTL(pipe);
1184         val = I915_READ(reg);
1185         WARN(!(val & FDI_RX_PLL_ENABLE), "FDI RX PLL assertion failure, should be active but is disabled\n");
1186 }
1187
1188 static void assert_panel_unlocked(struct drm_i915_private *dev_priv,
1189                                   enum pipe pipe)
1190 {
1191         int pp_reg, lvds_reg;
1192         u32 val;
1193         enum pipe panel_pipe = PIPE_A;
1194         bool locked = true;
1195
1196         if (HAS_PCH_SPLIT(dev_priv->dev)) {
1197                 pp_reg = PCH_PP_CONTROL;
1198                 lvds_reg = PCH_LVDS;
1199         } else {
1200                 pp_reg = PP_CONTROL;
1201                 lvds_reg = LVDS;
1202         }
1203
1204         val = I915_READ(pp_reg);
1205         if (!(val & PANEL_POWER_ON) ||
1206             ((val & PANEL_UNLOCK_REGS) == PANEL_UNLOCK_REGS))
1207                 locked = false;
1208
1209         if (I915_READ(lvds_reg) & LVDS_PIPEB_SELECT)
1210                 panel_pipe = PIPE_B;
1211
1212         WARN(panel_pipe == pipe && locked,
1213              "panel assertion failure, pipe %c regs locked\n",
1214              pipe_name(pipe));
1215 }
1216
1217 void assert_pipe(struct drm_i915_private *dev_priv,
1218                  enum pipe pipe, bool state)
1219 {
1220         int reg;
1221         u32 val;
1222         bool cur_state;
1223         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
1224                                                                       pipe);
1225
1226         /* if we need the pipe A quirk it must be always on */
1227         if (pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE)
1228                 state = true;
1229
1230         if (!intel_using_power_well(dev_priv->dev) &&
1231             cpu_transcoder != TRANSCODER_EDP) {
1232                 cur_state = false;
1233         } else {
1234                 reg = PIPECONF(cpu_transcoder);
1235                 val = I915_READ(reg);
1236                 cur_state = !!(val & PIPECONF_ENABLE);
1237         }
1238
1239         WARN(cur_state != state,
1240              "pipe %c assertion failure (expected %s, current %s)\n",
1241              pipe_name(pipe), state_string(state), state_string(cur_state));
1242 }
1243
1244 static void assert_plane(struct drm_i915_private *dev_priv,
1245                          enum plane plane, bool state)
1246 {
1247         int reg;
1248         u32 val;
1249         bool cur_state;
1250
1251         reg = DSPCNTR(plane);
1252         val = I915_READ(reg);
1253         cur_state = !!(val & DISPLAY_PLANE_ENABLE);
1254         WARN(cur_state != state,
1255              "plane %c assertion failure (expected %s, current %s)\n",
1256              plane_name(plane), state_string(state), state_string(cur_state));
1257 }
1258
1259 #define assert_plane_enabled(d, p) assert_plane(d, p, true)
1260 #define assert_plane_disabled(d, p) assert_plane(d, p, false)
1261
1262 static void assert_planes_disabled(struct drm_i915_private *dev_priv,
1263                                    enum pipe pipe)
1264 {
1265         int reg, i;
1266         u32 val;
1267         int cur_pipe;
1268
1269         /* Planes are fixed to pipes on ILK+ */
1270         if (HAS_PCH_SPLIT(dev_priv->dev) || IS_VALLEYVIEW(dev_priv->dev)) {
1271                 reg = DSPCNTR(pipe);
1272                 val = I915_READ(reg);
1273                 WARN((val & DISPLAY_PLANE_ENABLE),
1274                      "plane %c assertion failure, should be disabled but not\n",
1275                      plane_name(pipe));
1276                 return;
1277         }
1278
1279         /* Need to check both planes against the pipe */
1280         for (i = 0; i < 2; i++) {
1281                 reg = DSPCNTR(i);
1282                 val = I915_READ(reg);
1283                 cur_pipe = (val & DISPPLANE_SEL_PIPE_MASK) >>
1284                         DISPPLANE_SEL_PIPE_SHIFT;
1285                 WARN((val & DISPLAY_PLANE_ENABLE) && pipe == cur_pipe,
1286                      "plane %c assertion failure, should be off on pipe %c but is still active\n",
1287                      plane_name(i), pipe_name(pipe));
1288         }
1289 }
1290
1291 static void assert_sprites_disabled(struct drm_i915_private *dev_priv,
1292                                     enum pipe pipe)
1293 {
1294         int reg, i;
1295         u32 val;
1296
1297         if (!IS_VALLEYVIEW(dev_priv->dev))
1298                 return;
1299
1300         /* Need to check both planes against the pipe */
1301         for (i = 0; i < dev_priv->num_plane; i++) {
1302                 reg = SPCNTR(pipe, i);
1303                 val = I915_READ(reg);
1304                 WARN((val & SP_ENABLE),
1305                      "sprite %d assertion failure, should be off on pipe %c but is still active\n",
1306                      pipe * 2 + i, pipe_name(pipe));
1307         }
1308 }
1309
1310 static void assert_pch_refclk_enabled(struct drm_i915_private *dev_priv)
1311 {
1312         u32 val;
1313         bool enabled;
1314
1315         if (HAS_PCH_LPT(dev_priv->dev)) {
1316                 DRM_DEBUG_DRIVER("LPT does not has PCH refclk, skipping check\n");
1317                 return;
1318         }
1319
1320         val = I915_READ(PCH_DREF_CONTROL);
1321         enabled = !!(val & (DREF_SSC_SOURCE_MASK | DREF_NONSPREAD_SOURCE_MASK |
1322                             DREF_SUPERSPREAD_SOURCE_MASK));
1323         WARN(!enabled, "PCH refclk assertion failure, should be active but is disabled\n");
1324 }
1325
1326 static void assert_transcoder_disabled(struct drm_i915_private *dev_priv,
1327                                        enum pipe pipe)
1328 {
1329         int reg;
1330         u32 val;
1331         bool enabled;
1332
1333         reg = TRANSCONF(pipe);
1334         val = I915_READ(reg);
1335         enabled = !!(val & TRANS_ENABLE);
1336         WARN(enabled,
1337              "transcoder assertion failed, should be off on pipe %c but is still active\n",
1338              pipe_name(pipe));
1339 }
1340
1341 static bool dp_pipe_enabled(struct drm_i915_private *dev_priv,
1342                             enum pipe pipe, u32 port_sel, u32 val)
1343 {
1344         if ((val & DP_PORT_EN) == 0)
1345                 return false;
1346
1347         if (HAS_PCH_CPT(dev_priv->dev)) {
1348                 u32     trans_dp_ctl_reg = TRANS_DP_CTL(pipe);
1349                 u32     trans_dp_ctl = I915_READ(trans_dp_ctl_reg);
1350                 if ((trans_dp_ctl & TRANS_DP_PORT_SEL_MASK) != port_sel)
1351                         return false;
1352         } else {
1353                 if ((val & DP_PIPE_MASK) != (pipe << 30))
1354                         return false;
1355         }
1356         return true;
1357 }
1358
1359 static bool hdmi_pipe_enabled(struct drm_i915_private *dev_priv,
1360                               enum pipe pipe, u32 val)
1361 {
1362         if ((val & SDVO_ENABLE) == 0)
1363                 return false;
1364
1365         if (HAS_PCH_CPT(dev_priv->dev)) {
1366                 if ((val & SDVO_PIPE_SEL_MASK_CPT) != SDVO_PIPE_SEL_CPT(pipe))
1367                         return false;
1368         } else {
1369                 if ((val & SDVO_PIPE_SEL_MASK) != SDVO_PIPE_SEL(pipe))
1370                         return false;
1371         }
1372         return true;
1373 }
1374
1375 static bool lvds_pipe_enabled(struct drm_i915_private *dev_priv,
1376                               enum pipe pipe, u32 val)
1377 {
1378         if ((val & LVDS_PORT_EN) == 0)
1379                 return false;
1380
1381         if (HAS_PCH_CPT(dev_priv->dev)) {
1382                 if ((val & PORT_TRANS_SEL_MASK) != PORT_TRANS_SEL_CPT(pipe))
1383                         return false;
1384         } else {
1385                 if ((val & LVDS_PIPE_MASK) != LVDS_PIPE(pipe))
1386                         return false;
1387         }
1388         return true;
1389 }
1390
1391 static bool adpa_pipe_enabled(struct drm_i915_private *dev_priv,
1392                               enum pipe pipe, u32 val)
1393 {
1394         if ((val & ADPA_DAC_ENABLE) == 0)
1395                 return false;
1396         if (HAS_PCH_CPT(dev_priv->dev)) {
1397                 if ((val & PORT_TRANS_SEL_MASK) != PORT_TRANS_SEL_CPT(pipe))
1398                         return false;
1399         } else {
1400                 if ((val & ADPA_PIPE_SELECT_MASK) != ADPA_PIPE_SELECT(pipe))
1401                         return false;
1402         }
1403         return true;
1404 }
1405
1406 static void assert_pch_dp_disabled(struct drm_i915_private *dev_priv,
1407                                    enum pipe pipe, int reg, u32 port_sel)
1408 {
1409         u32 val = I915_READ(reg);
1410         WARN(dp_pipe_enabled(dev_priv, pipe, port_sel, val),
1411              "PCH DP (0x%08x) enabled on transcoder %c, should be disabled\n",
1412              reg, pipe_name(pipe));
1413
1414         WARN(HAS_PCH_IBX(dev_priv->dev) && (val & DP_PORT_EN) == 0
1415              && (val & DP_PIPEB_SELECT),
1416              "IBX PCH dp port still using transcoder B\n");
1417 }
1418
1419 static void assert_pch_hdmi_disabled(struct drm_i915_private *dev_priv,
1420                                      enum pipe pipe, int reg)
1421 {
1422         u32 val = I915_READ(reg);
1423         WARN(hdmi_pipe_enabled(dev_priv, pipe, val),
1424              "PCH HDMI (0x%08x) enabled on transcoder %c, should be disabled\n",
1425              reg, pipe_name(pipe));
1426
1427         WARN(HAS_PCH_IBX(dev_priv->dev) && (val & SDVO_ENABLE) == 0
1428              && (val & SDVO_PIPE_B_SELECT),
1429              "IBX PCH hdmi port still using transcoder B\n");
1430 }
1431
1432 static void assert_pch_ports_disabled(struct drm_i915_private *dev_priv,
1433                                       enum pipe pipe)
1434 {
1435         int reg;
1436         u32 val;
1437
1438         assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_B, TRANS_DP_PORT_SEL_B);
1439         assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_C, TRANS_DP_PORT_SEL_C);
1440         assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_D, TRANS_DP_PORT_SEL_D);
1441
1442         reg = PCH_ADPA;
1443         val = I915_READ(reg);
1444         WARN(adpa_pipe_enabled(dev_priv, pipe, val),
1445              "PCH VGA enabled on transcoder %c, should be disabled\n",
1446              pipe_name(pipe));
1447
1448         reg = PCH_LVDS;
1449         val = I915_READ(reg);
1450         WARN(lvds_pipe_enabled(dev_priv, pipe, val),
1451              "PCH LVDS enabled on transcoder %c, should be disabled\n",
1452              pipe_name(pipe));
1453
1454         assert_pch_hdmi_disabled(dev_priv, pipe, PCH_HDMIB);
1455         assert_pch_hdmi_disabled(dev_priv, pipe, PCH_HDMIC);
1456         assert_pch_hdmi_disabled(dev_priv, pipe, PCH_HDMID);
1457 }
1458
1459 /**
1460  * intel_enable_pll - enable a PLL
1461  * @dev_priv: i915 private structure
1462  * @pipe: pipe PLL to enable
1463  *
1464  * Enable @pipe's PLL so we can start pumping pixels from a plane.  Check to
1465  * make sure the PLL reg is writable first though, since the panel write
1466  * protect mechanism may be enabled.
1467  *
1468  * Note!  This is for pre-ILK only.
1469  *
1470  * Unfortunately needed by dvo_ns2501 since the dvo depends on it running.
1471  */
1472 static void intel_enable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
1473 {
1474         int reg;
1475         u32 val;
1476
1477         /* No really, not for ILK+ */
1478         BUG_ON(!IS_VALLEYVIEW(dev_priv->dev) && dev_priv->info->gen >= 5);
1479
1480         /* PLL is protected by panel, make sure we can write it */
1481         if (IS_MOBILE(dev_priv->dev) && !IS_I830(dev_priv->dev))
1482                 assert_panel_unlocked(dev_priv, pipe);
1483
1484         reg = DPLL(pipe);
1485         val = I915_READ(reg);
1486         val |= DPLL_VCO_ENABLE;
1487
1488         /* We do this three times for luck */
1489         I915_WRITE(reg, val);
1490         POSTING_READ(reg);
1491         udelay(150); /* wait for warmup */
1492         I915_WRITE(reg, val);
1493         POSTING_READ(reg);
1494         udelay(150); /* wait for warmup */
1495         I915_WRITE(reg, val);
1496         POSTING_READ(reg);
1497         udelay(150); /* wait for warmup */
1498 }
1499
1500 /**
1501  * intel_disable_pll - disable a PLL
1502  * @dev_priv: i915 private structure
1503  * @pipe: pipe PLL to disable
1504  *
1505  * Disable the PLL for @pipe, making sure the pipe is off first.
1506  *
1507  * Note!  This is for pre-ILK only.
1508  */
1509 static void intel_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
1510 {
1511         int reg;
1512         u32 val;
1513
1514         /* Don't disable pipe A or pipe A PLLs if needed */
1515         if (pipe == PIPE_A && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
1516                 return;
1517
1518         /* Make sure the pipe isn't still relying on us */
1519         assert_pipe_disabled(dev_priv, pipe);
1520
1521         reg = DPLL(pipe);
1522         val = I915_READ(reg);
1523         val &= ~DPLL_VCO_ENABLE;
1524         I915_WRITE(reg, val);
1525         POSTING_READ(reg);
1526 }
1527
1528 /* SBI access */
1529 static void
1530 intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value,
1531                 enum intel_sbi_destination destination)
1532 {
1533         u32 tmp;
1534
1535         WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
1536
1537         if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
1538                                 100)) {
1539                 DRM_ERROR("timeout waiting for SBI to become ready\n");
1540                 return;
1541         }
1542
1543         I915_WRITE(SBI_ADDR, (reg << 16));
1544         I915_WRITE(SBI_DATA, value);
1545
1546         if (destination == SBI_ICLK)
1547                 tmp = SBI_CTL_DEST_ICLK | SBI_CTL_OP_CRWR;
1548         else
1549                 tmp = SBI_CTL_DEST_MPHY | SBI_CTL_OP_IOWR;
1550         I915_WRITE(SBI_CTL_STAT, SBI_BUSY | tmp);
1551
1552         if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
1553                                 100)) {
1554                 DRM_ERROR("timeout waiting for SBI to complete write transaction\n");
1555                 return;
1556         }
1557 }
1558
1559 static u32
1560 intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg,
1561                enum intel_sbi_destination destination)
1562 {
1563         u32 value = 0;
1564         WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
1565
1566         if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
1567                                 100)) {
1568                 DRM_ERROR("timeout waiting for SBI to become ready\n");
1569                 return 0;
1570         }
1571
1572         I915_WRITE(SBI_ADDR, (reg << 16));
1573
1574         if (destination == SBI_ICLK)
1575                 value = SBI_CTL_DEST_ICLK | SBI_CTL_OP_CRRD;
1576         else
1577                 value = SBI_CTL_DEST_MPHY | SBI_CTL_OP_IORD;
1578         I915_WRITE(SBI_CTL_STAT, value | SBI_BUSY);
1579
1580         if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
1581                                 100)) {
1582                 DRM_ERROR("timeout waiting for SBI to complete read transaction\n");
1583                 return 0;
1584         }
1585
1586         return I915_READ(SBI_DATA);
1587 }
1588
1589 /**
1590  * ironlake_enable_pch_pll - enable PCH PLL
1591  * @dev_priv: i915 private structure
1592  * @pipe: pipe PLL to enable
1593  *
1594  * The PCH PLL needs to be enabled before the PCH transcoder, since it
1595  * drives the transcoder clock.
1596  */
1597 static void ironlake_enable_pch_pll(struct intel_crtc *intel_crtc)
1598 {
1599         struct drm_i915_private *dev_priv = intel_crtc->base.dev->dev_private;
1600         struct intel_pch_pll *pll;
1601         int reg;
1602         u32 val;
1603
1604         /* PCH PLLs only available on ILK, SNB and IVB */
1605         BUG_ON(dev_priv->info->gen < 5);
1606         pll = intel_crtc->pch_pll;
1607         if (pll == NULL)
1608                 return;
1609
1610         if (WARN_ON(pll->refcount == 0))
1611                 return;
1612
1613         DRM_DEBUG_KMS("enable PCH PLL %x (active %d, on? %d)for crtc %d\n",
1614                       pll->pll_reg, pll->active, pll->on,
1615                       intel_crtc->base.base.id);
1616
1617         /* PCH refclock must be enabled first */
1618         assert_pch_refclk_enabled(dev_priv);
1619
1620         if (pll->active++ && pll->on) {
1621                 assert_pch_pll_enabled(dev_priv, pll, NULL);
1622                 return;
1623         }
1624
1625         DRM_DEBUG_KMS("enabling PCH PLL %x\n", pll->pll_reg);
1626
1627         reg = pll->pll_reg;
1628         val = I915_READ(reg);
1629         val |= DPLL_VCO_ENABLE;
1630         I915_WRITE(reg, val);
1631         POSTING_READ(reg);
1632         udelay(200);
1633
1634         pll->on = true;
1635 }
1636
1637 static void intel_disable_pch_pll(struct intel_crtc *intel_crtc)
1638 {
1639         struct drm_i915_private *dev_priv = intel_crtc->base.dev->dev_private;
1640         struct intel_pch_pll *pll = intel_crtc->pch_pll;
1641         int reg;
1642         u32 val;
1643
1644         /* PCH only available on ILK+ */
1645         BUG_ON(dev_priv->info->gen < 5);
1646         if (pll == NULL)
1647                return;
1648
1649         if (WARN_ON(pll->refcount == 0))
1650                 return;
1651
1652         DRM_DEBUG_KMS("disable PCH PLL %x (active %d, on? %d) for crtc %d\n",
1653                       pll->pll_reg, pll->active, pll->on,
1654                       intel_crtc->base.base.id);
1655
1656         if (WARN_ON(pll->active == 0)) {
1657                 assert_pch_pll_disabled(dev_priv, pll, NULL);
1658                 return;
1659         }
1660
1661         if (--pll->active) {
1662                 assert_pch_pll_enabled(dev_priv, pll, NULL);
1663                 return;
1664         }
1665
1666         DRM_DEBUG_KMS("disabling PCH PLL %x\n", pll->pll_reg);
1667
1668         /* Make sure transcoder isn't still depending on us */
1669         assert_transcoder_disabled(dev_priv, intel_crtc->pipe);
1670
1671         reg = pll->pll_reg;
1672         val = I915_READ(reg);
1673         val &= ~DPLL_VCO_ENABLE;
1674         I915_WRITE(reg, val);
1675         POSTING_READ(reg);
1676         udelay(200);
1677
1678         pll->on = false;
1679 }
1680
1681 static void ironlake_enable_pch_transcoder(struct drm_i915_private *dev_priv,
1682                                            enum pipe pipe)
1683 {
1684         struct drm_device *dev = dev_priv->dev;
1685         struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
1686         uint32_t reg, val, pipeconf_val;
1687
1688         /* PCH only available on ILK+ */
1689         BUG_ON(dev_priv->info->gen < 5);
1690
1691         /* Make sure PCH DPLL is enabled */
1692         assert_pch_pll_enabled(dev_priv,
1693                                to_intel_crtc(crtc)->pch_pll,
1694                                to_intel_crtc(crtc));
1695
1696         /* FDI must be feeding us bits for PCH ports */
1697         assert_fdi_tx_enabled(dev_priv, pipe);
1698         assert_fdi_rx_enabled(dev_priv, pipe);
1699
1700         if (HAS_PCH_CPT(dev)) {
1701                 /* Workaround: Set the timing override bit before enabling the
1702                  * pch transcoder. */
1703                 reg = TRANS_CHICKEN2(pipe);
1704                 val = I915_READ(reg);
1705                 val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
1706                 I915_WRITE(reg, val);
1707         }
1708
1709         reg = TRANSCONF(pipe);
1710         val = I915_READ(reg);
1711         pipeconf_val = I915_READ(PIPECONF(pipe));
1712
1713         if (HAS_PCH_IBX(dev_priv->dev)) {
1714                 /*
1715                  * make the BPC in transcoder be consistent with
1716                  * that in pipeconf reg.
1717                  */
1718                 val &= ~PIPECONF_BPC_MASK;
1719                 val |= pipeconf_val & PIPECONF_BPC_MASK;
1720         }
1721
1722         val &= ~TRANS_INTERLACE_MASK;
1723         if ((pipeconf_val & PIPECONF_INTERLACE_MASK) == PIPECONF_INTERLACED_ILK)
1724                 if (HAS_PCH_IBX(dev_priv->dev) &&
1725                     intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO))
1726                         val |= TRANS_LEGACY_INTERLACED_ILK;
1727                 else
1728                         val |= TRANS_INTERLACED;
1729         else
1730                 val |= TRANS_PROGRESSIVE;
1731
1732         I915_WRITE(reg, val | TRANS_ENABLE);
1733         if (wait_for(I915_READ(reg) & TRANS_STATE_ENABLE, 100))
1734                 DRM_ERROR("failed to enable transcoder %d\n", pipe);
1735 }
1736
1737 static void lpt_enable_pch_transcoder(struct drm_i915_private *dev_priv,
1738                                       enum transcoder cpu_transcoder)
1739 {
1740         u32 val, pipeconf_val;
1741
1742         /* PCH only available on ILK+ */
1743         BUG_ON(dev_priv->info->gen < 5);
1744
1745         /* FDI must be feeding us bits for PCH ports */
1746         assert_fdi_tx_enabled(dev_priv, (enum pipe) cpu_transcoder);
1747         assert_fdi_rx_enabled(dev_priv, TRANSCODER_A);
1748
1749         /* Workaround: set timing override bit. */
1750         val = I915_READ(_TRANSA_CHICKEN2);
1751         val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
1752         I915_WRITE(_TRANSA_CHICKEN2, val);
1753
1754         val = TRANS_ENABLE;
1755         pipeconf_val = I915_READ(PIPECONF(cpu_transcoder));
1756
1757         if ((pipeconf_val & PIPECONF_INTERLACE_MASK_HSW) ==
1758             PIPECONF_INTERLACED_ILK)
1759                 val |= TRANS_INTERLACED;
1760         else
1761                 val |= TRANS_PROGRESSIVE;
1762
1763         I915_WRITE(TRANSCONF(TRANSCODER_A), val);
1764         if (wait_for(I915_READ(_TRANSACONF) & TRANS_STATE_ENABLE, 100))
1765                 DRM_ERROR("Failed to enable PCH transcoder\n");
1766 }
1767
1768 static void ironlake_disable_pch_transcoder(struct drm_i915_private *dev_priv,
1769                                             enum pipe pipe)
1770 {
1771         struct drm_device *dev = dev_priv->dev;
1772         uint32_t reg, val;
1773
1774         /* FDI relies on the transcoder */
1775         assert_fdi_tx_disabled(dev_priv, pipe);
1776         assert_fdi_rx_disabled(dev_priv, pipe);
1777
1778         /* Ports must be off as well */
1779         assert_pch_ports_disabled(dev_priv, pipe);
1780
1781         reg = TRANSCONF(pipe);
1782         val = I915_READ(reg);
1783         val &= ~TRANS_ENABLE;
1784         I915_WRITE(reg, val);
1785         /* wait for PCH transcoder off, transcoder state */
1786         if (wait_for((I915_READ(reg) & TRANS_STATE_ENABLE) == 0, 50))
1787                 DRM_ERROR("failed to disable transcoder %d\n", pipe);
1788
1789         if (!HAS_PCH_IBX(dev)) {
1790                 /* Workaround: Clear the timing override chicken bit again. */
1791                 reg = TRANS_CHICKEN2(pipe);
1792                 val = I915_READ(reg);
1793                 val &= ~TRANS_CHICKEN2_TIMING_OVERRIDE;
1794                 I915_WRITE(reg, val);
1795         }
1796 }
1797
1798 static void lpt_disable_pch_transcoder(struct drm_i915_private *dev_priv)
1799 {
1800         u32 val;
1801
1802         val = I915_READ(_TRANSACONF);
1803         val &= ~TRANS_ENABLE;
1804         I915_WRITE(_TRANSACONF, val);
1805         /* wait for PCH transcoder off, transcoder state */
1806         if (wait_for((I915_READ(_TRANSACONF) & TRANS_STATE_ENABLE) == 0, 50))
1807                 DRM_ERROR("Failed to disable PCH transcoder\n");
1808
1809         /* Workaround: clear timing override bit. */
1810         val = I915_READ(_TRANSA_CHICKEN2);
1811         val &= ~TRANS_CHICKEN2_TIMING_OVERRIDE;
1812         I915_WRITE(_TRANSA_CHICKEN2, val);
1813 }
1814
1815 /**
1816  * intel_enable_pipe - enable a pipe, asserting requirements
1817  * @dev_priv: i915 private structure
1818  * @pipe: pipe to enable
1819  * @pch_port: on ILK+, is this pipe driving a PCH port or not
1820  *
1821  * Enable @pipe, making sure that various hardware specific requirements
1822  * are met, if applicable, e.g. PLL enabled, LVDS pairs enabled, etc.
1823  *
1824  * @pipe should be %PIPE_A or %PIPE_B.
1825  *
1826  * Will wait until the pipe is actually running (i.e. first vblank) before
1827  * returning.
1828  */
1829 static void intel_enable_pipe(struct drm_i915_private *dev_priv, enum pipe pipe,
1830                               bool pch_port)
1831 {
1832         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
1833                                                                       pipe);
1834         enum pipe pch_transcoder;
1835         int reg;
1836         u32 val;
1837
1838         if (HAS_PCH_LPT(dev_priv->dev))
1839                 pch_transcoder = TRANSCODER_A;
1840         else
1841                 pch_transcoder = pipe;
1842
1843         /*
1844          * A pipe without a PLL won't actually be able to drive bits from
1845          * a plane.  On ILK+ the pipe PLLs are integrated, so we don't
1846          * need the check.
1847          */
1848         if (!HAS_PCH_SPLIT(dev_priv->dev))
1849                 assert_pll_enabled(dev_priv, pipe);
1850         else {
1851                 if (pch_port) {
1852                         /* if driving the PCH, we need FDI enabled */
1853                         assert_fdi_rx_pll_enabled(dev_priv, pch_transcoder);
1854                         assert_fdi_tx_pll_enabled(dev_priv,
1855                                                   (enum pipe) cpu_transcoder);
1856                 }
1857                 /* FIXME: assert CPU port conditions for SNB+ */
1858         }
1859
1860         reg = PIPECONF(cpu_transcoder);
1861         val = I915_READ(reg);
1862         if (val & PIPECONF_ENABLE)
1863                 return;
1864
1865         I915_WRITE(reg, val | PIPECONF_ENABLE);
1866         intel_wait_for_vblank(dev_priv->dev, pipe);
1867 }
1868
1869 /**
1870  * intel_disable_pipe - disable a pipe, asserting requirements
1871  * @dev_priv: i915 private structure
1872  * @pipe: pipe to disable
1873  *
1874  * Disable @pipe, making sure that various hardware specific requirements
1875  * are met, if applicable, e.g. plane disabled, panel fitter off, etc.
1876  *
1877  * @pipe should be %PIPE_A or %PIPE_B.
1878  *
1879  * Will wait until the pipe has shut down before returning.
1880  */
1881 static void intel_disable_pipe(struct drm_i915_private *dev_priv,
1882                                enum pipe pipe)
1883 {
1884         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
1885                                                                       pipe);
1886         int reg;
1887         u32 val;
1888
1889         /*
1890          * Make sure planes won't keep trying to pump pixels to us,
1891          * or we might hang the display.
1892          */
1893         assert_planes_disabled(dev_priv, pipe);
1894         assert_sprites_disabled(dev_priv, pipe);
1895
1896         /* Don't disable pipe A or pipe A PLLs if needed */
1897         if (pipe == PIPE_A && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
1898                 return;
1899
1900         reg = PIPECONF(cpu_transcoder);
1901         val = I915_READ(reg);
1902         if ((val & PIPECONF_ENABLE) == 0)
1903                 return;
1904
1905         I915_WRITE(reg, val & ~PIPECONF_ENABLE);
1906         intel_wait_for_pipe_off(dev_priv->dev, pipe);
1907 }
1908
1909 /*
1910  * Plane regs are double buffered, going from enabled->disabled needs a
1911  * trigger in order to latch.  The display address reg provides this.
1912  */
1913 void intel_flush_display_plane(struct drm_i915_private *dev_priv,
1914                                       enum plane plane)
1915 {
1916         if (dev_priv->info->gen >= 4)
1917                 I915_WRITE(DSPSURF(plane), I915_READ(DSPSURF(plane)));
1918         else
1919                 I915_WRITE(DSPADDR(plane), I915_READ(DSPADDR(plane)));
1920 }
1921
1922 /**
1923  * intel_enable_plane - enable a display plane on a given pipe
1924  * @dev_priv: i915 private structure
1925  * @plane: plane to enable
1926  * @pipe: pipe being fed
1927  *
1928  * Enable @plane on @pipe, making sure that @pipe is running first.
1929  */
1930 static void intel_enable_plane(struct drm_i915_private *dev_priv,
1931                                enum plane plane, enum pipe pipe)
1932 {
1933         int reg;
1934         u32 val;
1935
1936         /* If the pipe isn't enabled, we can't pump pixels and may hang */
1937         assert_pipe_enabled(dev_priv, pipe);
1938
1939         reg = DSPCNTR(plane);
1940         val = I915_READ(reg);
1941         if (val & DISPLAY_PLANE_ENABLE)
1942                 return;
1943
1944         I915_WRITE(reg, val | DISPLAY_PLANE_ENABLE);
1945         intel_flush_display_plane(dev_priv, plane);
1946         intel_wait_for_vblank(dev_priv->dev, pipe);
1947 }
1948
1949 /**
1950  * intel_disable_plane - disable a display plane
1951  * @dev_priv: i915 private structure
1952  * @plane: plane to disable
1953  * @pipe: pipe consuming the data
1954  *
1955  * Disable @plane; should be an independent operation.
1956  */
1957 static void intel_disable_plane(struct drm_i915_private *dev_priv,
1958                                 enum plane plane, enum pipe pipe)
1959 {
1960         int reg;
1961         u32 val;
1962
1963         reg = DSPCNTR(plane);
1964         val = I915_READ(reg);
1965         if ((val & DISPLAY_PLANE_ENABLE) == 0)
1966                 return;
1967
1968         I915_WRITE(reg, val & ~DISPLAY_PLANE_ENABLE);
1969         intel_flush_display_plane(dev_priv, plane);
1970         intel_wait_for_vblank(dev_priv->dev, pipe);
1971 }
1972
1973 static bool need_vtd_wa(struct drm_device *dev)
1974 {
1975 #ifdef CONFIG_INTEL_IOMMU
1976         if (INTEL_INFO(dev)->gen >= 6 && intel_iommu_gfx_mapped)
1977                 return true;
1978 #endif
1979         return false;
1980 }
1981
1982 int
1983 intel_pin_and_fence_fb_obj(struct drm_device *dev,
1984                            struct drm_i915_gem_object *obj,
1985                            struct intel_ring_buffer *pipelined)
1986 {
1987         struct drm_i915_private *dev_priv = dev->dev_private;
1988         u32 alignment;
1989         int ret;
1990
1991         switch (obj->tiling_mode) {
1992         case I915_TILING_NONE:
1993                 if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
1994                         alignment = 128 * 1024;
1995                 else if (INTEL_INFO(dev)->gen >= 4)
1996                         alignment = 4 * 1024;
1997                 else
1998                         alignment = 64 * 1024;
1999                 break;
2000         case I915_TILING_X:
2001                 /* pin() will align the object as required by fence */
2002                 alignment = 0;
2003                 break;
2004         case I915_TILING_Y:
2005                 /* Despite that we check this in framebuffer_init userspace can
2006                  * screw us over and change the tiling after the fact. Only
2007                  * pinned buffers can't change their tiling. */
2008                 DRM_DEBUG_DRIVER("Y tiled not allowed for scan out buffers\n");
2009                 return -EINVAL;
2010         default:
2011                 BUG();
2012         }
2013
2014         /* Note that the w/a also requires 64 PTE of padding following the
2015          * bo. We currently fill all unused PTE with the shadow page and so
2016          * we should always have valid PTE following the scanout preventing
2017          * the VT-d warning.
2018          */
2019         if (need_vtd_wa(dev) && alignment < 256 * 1024)
2020                 alignment = 256 * 1024;
2021
2022         dev_priv->mm.interruptible = false;
2023         ret = i915_gem_object_pin_to_display_plane(obj, alignment, pipelined);
2024         if (ret)
2025                 goto err_interruptible;
2026
2027         /* Install a fence for tiled scan-out. Pre-i965 always needs a
2028          * fence, whereas 965+ only requires a fence if using
2029          * framebuffer compression.  For simplicity, we always install
2030          * a fence as the cost is not that onerous.
2031          */
2032         ret = i915_gem_object_get_fence(obj);
2033         if (ret)
2034                 goto err_unpin;
2035
2036         i915_gem_object_pin_fence(obj);
2037
2038         dev_priv->mm.interruptible = true;
2039         return 0;
2040
2041 err_unpin:
2042         i915_gem_object_unpin(obj);
2043 err_interruptible:
2044         dev_priv->mm.interruptible = true;
2045         return ret;
2046 }
2047
2048 void intel_unpin_fb_obj(struct drm_i915_gem_object *obj)
2049 {
2050         i915_gem_object_unpin_fence(obj);
2051         i915_gem_object_unpin(obj);
2052 }
2053
2054 /* Computes the linear offset to the base tile and adjusts x, y. bytes per pixel
2055  * is assumed to be a power-of-two. */
2056 unsigned long intel_gen4_compute_page_offset(int *x, int *y,
2057                                              unsigned int tiling_mode,
2058                                              unsigned int cpp,
2059                                              unsigned int pitch)
2060 {
2061         if (tiling_mode != I915_TILING_NONE) {
2062                 unsigned int tile_rows, tiles;
2063
2064                 tile_rows = *y / 8;
2065                 *y %= 8;
2066
2067                 tiles = *x / (512/cpp);
2068                 *x %= 512/cpp;
2069
2070                 return tile_rows * pitch * 8 + tiles * 4096;
2071         } else {
2072                 unsigned int offset;
2073
2074                 offset = *y * pitch + *x * cpp;
2075                 *y = 0;
2076                 *x = (offset & 4095) / cpp;
2077                 return offset & -4096;
2078         }
2079 }
2080
2081 static int i9xx_update_plane(struct drm_crtc *crtc, struct drm_framebuffer *fb,
2082                              int x, int y)
2083 {
2084         struct drm_device *dev = crtc->dev;
2085         struct drm_i915_private *dev_priv = dev->dev_private;
2086         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2087         struct intel_framebuffer *intel_fb;
2088         struct drm_i915_gem_object *obj;
2089         int plane = intel_crtc->plane;
2090         unsigned long linear_offset;
2091         u32 dspcntr;
2092         u32 reg;
2093
2094         switch (plane) {
2095         case 0:
2096         case 1:
2097                 break;
2098         default:
2099                 DRM_ERROR("Can't update plane %d in SAREA\n", plane);
2100                 return -EINVAL;
2101         }
2102
2103         intel_fb = to_intel_framebuffer(fb);
2104         obj = intel_fb->obj;
2105
2106         reg = DSPCNTR(plane);
2107         dspcntr = I915_READ(reg);
2108         /* Mask out pixel format bits in case we change it */
2109         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
2110         switch (fb->pixel_format) {
2111         case DRM_FORMAT_C8:
2112                 dspcntr |= DISPPLANE_8BPP;
2113                 break;
2114         case DRM_FORMAT_XRGB1555:
2115         case DRM_FORMAT_ARGB1555:
2116                 dspcntr |= DISPPLANE_BGRX555;
2117                 break;
2118         case DRM_FORMAT_RGB565:
2119                 dspcntr |= DISPPLANE_BGRX565;
2120                 break;
2121         case DRM_FORMAT_XRGB8888:
2122         case DRM_FORMAT_ARGB8888:
2123                 dspcntr |= DISPPLANE_BGRX888;
2124                 break;
2125         case DRM_FORMAT_XBGR8888:
2126         case DRM_FORMAT_ABGR8888:
2127                 dspcntr |= DISPPLANE_RGBX888;
2128                 break;
2129         case DRM_FORMAT_XRGB2101010:
2130         case DRM_FORMAT_ARGB2101010:
2131                 dspcntr |= DISPPLANE_BGRX101010;
2132                 break;
2133         case DRM_FORMAT_XBGR2101010:
2134         case DRM_FORMAT_ABGR2101010:
2135                 dspcntr |= DISPPLANE_RGBX101010;
2136                 break;
2137         default:
2138                 BUG();
2139         }
2140
2141         if (INTEL_INFO(dev)->gen >= 4) {
2142                 if (obj->tiling_mode != I915_TILING_NONE)
2143                         dspcntr |= DISPPLANE_TILED;
2144                 else
2145                         dspcntr &= ~DISPPLANE_TILED;
2146         }
2147
2148         I915_WRITE(reg, dspcntr);
2149
2150         linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
2151
2152         if (INTEL_INFO(dev)->gen >= 4) {
2153                 intel_crtc->dspaddr_offset =
2154                         intel_gen4_compute_page_offset(&x, &y, obj->tiling_mode,
2155                                                        fb->bits_per_pixel / 8,
2156                                                        fb->pitches[0]);
2157                 linear_offset -= intel_crtc->dspaddr_offset;
2158         } else {
2159                 intel_crtc->dspaddr_offset = linear_offset;
2160         }
2161
2162         DRM_DEBUG_KMS("Writing base %08X %08lX %d %d %d\n",
2163                       obj->gtt_offset, linear_offset, x, y, fb->pitches[0]);
2164         I915_WRITE(DSPSTRIDE(plane), fb->pitches[0]);
2165         if (INTEL_INFO(dev)->gen >= 4) {
2166                 I915_MODIFY_DISPBASE(DSPSURF(plane),
2167                                      obj->gtt_offset + intel_crtc->dspaddr_offset);
2168                 I915_WRITE(DSPTILEOFF(plane), (y << 16) | x);
2169                 I915_WRITE(DSPLINOFF(plane), linear_offset);
2170         } else
2171                 I915_WRITE(DSPADDR(plane), obj->gtt_offset + linear_offset);
2172         POSTING_READ(reg);
2173
2174         return 0;
2175 }
2176
2177 static int ironlake_update_plane(struct drm_crtc *crtc,
2178                                  struct drm_framebuffer *fb, int x, int y)
2179 {
2180         struct drm_device *dev = crtc->dev;
2181         struct drm_i915_private *dev_priv = dev->dev_private;
2182         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2183         struct intel_framebuffer *intel_fb;
2184         struct drm_i915_gem_object *obj;
2185         int plane = intel_crtc->plane;
2186         unsigned long linear_offset;
2187         u32 dspcntr;
2188         u32 reg;
2189
2190         switch (plane) {
2191         case 0:
2192         case 1:
2193         case 2:
2194                 break;
2195         default:
2196                 DRM_ERROR("Can't update plane %d in SAREA\n", plane);
2197                 return -EINVAL;
2198         }
2199
2200         intel_fb = to_intel_framebuffer(fb);
2201         obj = intel_fb->obj;
2202
2203         reg = DSPCNTR(plane);
2204         dspcntr = I915_READ(reg);
2205         /* Mask out pixel format bits in case we change it */
2206         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
2207         switch (fb->pixel_format) {
2208         case DRM_FORMAT_C8:
2209                 dspcntr |= DISPPLANE_8BPP;
2210                 break;
2211         case DRM_FORMAT_RGB565:
2212                 dspcntr |= DISPPLANE_BGRX565;
2213                 break;
2214         case DRM_FORMAT_XRGB8888:
2215         case DRM_FORMAT_ARGB8888:
2216                 dspcntr |= DISPPLANE_BGRX888;
2217                 break;
2218         case DRM_FORMAT_XBGR8888:
2219         case DRM_FORMAT_ABGR8888:
2220                 dspcntr |= DISPPLANE_RGBX888;
2221                 break;
2222         case DRM_FORMAT_XRGB2101010:
2223         case DRM_FORMAT_ARGB2101010:
2224                 dspcntr |= DISPPLANE_BGRX101010;
2225                 break;
2226         case DRM_FORMAT_XBGR2101010:
2227         case DRM_FORMAT_ABGR2101010:
2228                 dspcntr |= DISPPLANE_RGBX101010;
2229                 break;
2230         default:
2231                 BUG();
2232         }
2233
2234         if (obj->tiling_mode != I915_TILING_NONE)
2235                 dspcntr |= DISPPLANE_TILED;
2236         else
2237                 dspcntr &= ~DISPPLANE_TILED;
2238
2239         /* must disable */
2240         dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
2241
2242         I915_WRITE(reg, dspcntr);
2243
2244         linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
2245         intel_crtc->dspaddr_offset =
2246                 intel_gen4_compute_page_offset(&x, &y, obj->tiling_mode,
2247                                                fb->bits_per_pixel / 8,
2248                                                fb->pitches[0]);
2249         linear_offset -= intel_crtc->dspaddr_offset;
2250
2251         DRM_DEBUG_KMS("Writing base %08X %08lX %d %d %d\n",
2252                       obj->gtt_offset, linear_offset, x, y, fb->pitches[0]);
2253         I915_WRITE(DSPSTRIDE(plane), fb->pitches[0]);
2254         I915_MODIFY_DISPBASE(DSPSURF(plane),
2255                              obj->gtt_offset + intel_crtc->dspaddr_offset);
2256         if (IS_HASWELL(dev)) {
2257                 I915_WRITE(DSPOFFSET(plane), (y << 16) | x);
2258         } else {
2259                 I915_WRITE(DSPTILEOFF(plane), (y << 16) | x);
2260                 I915_WRITE(DSPLINOFF(plane), linear_offset);
2261         }
2262         POSTING_READ(reg);
2263
2264         return 0;
2265 }
2266
2267 /* Assume fb object is pinned & idle & fenced and just update base pointers */
2268 static int
2269 intel_pipe_set_base_atomic(struct drm_crtc *crtc, struct drm_framebuffer *fb,
2270                            int x, int y, enum mode_set_atomic state)
2271 {
2272         struct drm_device *dev = crtc->dev;
2273         struct drm_i915_private *dev_priv = dev->dev_private;
2274
2275         if (dev_priv->display.disable_fbc)
2276                 dev_priv->display.disable_fbc(dev);
2277         intel_increase_pllclock(crtc);
2278
2279         return dev_priv->display.update_plane(crtc, fb, x, y);
2280 }
2281
2282 void intel_display_handle_reset(struct drm_device *dev)
2283 {
2284         struct drm_i915_private *dev_priv = dev->dev_private;
2285         struct drm_crtc *crtc;
2286
2287         /*
2288          * Flips in the rings have been nuked by the reset,
2289          * so complete all pending flips so that user space
2290          * will get its events and not get stuck.
2291          *
2292          * Also update the base address of all primary
2293          * planes to the the last fb to make sure we're
2294          * showing the correct fb after a reset.
2295          *
2296          * Need to make two loops over the crtcs so that we
2297          * don't try to grab a crtc mutex before the
2298          * pending_flip_queue really got woken up.
2299          */
2300
2301         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
2302                 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2303                 enum plane plane = intel_crtc->plane;
2304
2305                 intel_prepare_page_flip(dev, plane);
2306                 intel_finish_page_flip_plane(dev, plane);
2307         }
2308
2309         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
2310                 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2311
2312                 mutex_lock(&crtc->mutex);
2313                 if (intel_crtc->active)
2314                         dev_priv->display.update_plane(crtc, crtc->fb,
2315                                                        crtc->x, crtc->y);
2316                 mutex_unlock(&crtc->mutex);
2317         }
2318 }
2319
2320 static int
2321 intel_finish_fb(struct drm_framebuffer *old_fb)
2322 {
2323         struct drm_i915_gem_object *obj = to_intel_framebuffer(old_fb)->obj;
2324         struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
2325         bool was_interruptible = dev_priv->mm.interruptible;
2326         int ret;
2327
2328         /* Big Hammer, we also need to ensure that any pending
2329          * MI_WAIT_FOR_EVENT inside a user batch buffer on the
2330          * current scanout is retired before unpinning the old
2331          * framebuffer.
2332          *
2333          * This should only fail upon a hung GPU, in which case we
2334          * can safely continue.
2335          */
2336         dev_priv->mm.interruptible = false;
2337         ret = i915_gem_object_finish_gpu(obj);
2338         dev_priv->mm.interruptible = was_interruptible;
2339
2340         return ret;
2341 }
2342
2343 static void intel_crtc_update_sarea_pos(struct drm_crtc *crtc, int x, int y)
2344 {
2345         struct drm_device *dev = crtc->dev;
2346         struct drm_i915_master_private *master_priv;
2347         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2348
2349         if (!dev->primary->master)
2350                 return;
2351
2352         master_priv = dev->primary->master->driver_priv;
2353         if (!master_priv->sarea_priv)
2354                 return;
2355
2356         switch (intel_crtc->pipe) {
2357         case 0:
2358                 master_priv->sarea_priv->pipeA_x = x;
2359                 master_priv->sarea_priv->pipeA_y = y;
2360                 break;
2361         case 1:
2362                 master_priv->sarea_priv->pipeB_x = x;
2363                 master_priv->sarea_priv->pipeB_y = y;
2364                 break;
2365         default:
2366                 break;
2367         }
2368 }
2369
2370 static int
2371 intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
2372                     struct drm_framebuffer *fb)
2373 {
2374         struct drm_device *dev = crtc->dev;
2375         struct drm_i915_private *dev_priv = dev->dev_private;
2376         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2377         struct drm_framebuffer *old_fb;
2378         int ret;
2379
2380         /* no fb bound */
2381         if (!fb) {
2382                 DRM_ERROR("No FB bound\n");
2383                 return 0;
2384         }
2385
2386         if (intel_crtc->plane > INTEL_INFO(dev)->num_pipes) {
2387                 DRM_ERROR("no plane for crtc: plane %d, num_pipes %d\n",
2388                                 intel_crtc->plane,
2389                                 INTEL_INFO(dev)->num_pipes);
2390                 return -EINVAL;
2391         }
2392
2393         mutex_lock(&dev->struct_mutex);
2394         ret = intel_pin_and_fence_fb_obj(dev,
2395                                          to_intel_framebuffer(fb)->obj,
2396                                          NULL);
2397         if (ret != 0) {
2398                 mutex_unlock(&dev->struct_mutex);
2399                 DRM_ERROR("pin & fence failed\n");
2400                 return ret;
2401         }
2402
2403         ret = dev_priv->display.update_plane(crtc, fb, x, y);
2404         if (ret) {
2405                 intel_unpin_fb_obj(to_intel_framebuffer(fb)->obj);
2406                 mutex_unlock(&dev->struct_mutex);
2407                 DRM_ERROR("failed to update base address\n");
2408                 return ret;
2409         }
2410
2411         old_fb = crtc->fb;
2412         crtc->fb = fb;
2413         crtc->x = x;
2414         crtc->y = y;
2415
2416         if (old_fb) {
2417                 intel_wait_for_vblank(dev, intel_crtc->pipe);
2418                 intel_unpin_fb_obj(to_intel_framebuffer(old_fb)->obj);
2419         }
2420
2421         intel_update_fbc(dev);
2422         mutex_unlock(&dev->struct_mutex);
2423
2424         intel_crtc_update_sarea_pos(crtc, x, y);
2425
2426         return 0;
2427 }
2428
2429 static void intel_fdi_normal_train(struct drm_crtc *crtc)
2430 {
2431         struct drm_device *dev = crtc->dev;
2432         struct drm_i915_private *dev_priv = dev->dev_private;
2433         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2434         int pipe = intel_crtc->pipe;
2435         u32 reg, temp;
2436
2437         /* enable normal train */
2438         reg = FDI_TX_CTL(pipe);
2439         temp = I915_READ(reg);
2440         if (IS_IVYBRIDGE(dev)) {
2441                 temp &= ~FDI_LINK_TRAIN_NONE_IVB;
2442                 temp |= FDI_LINK_TRAIN_NONE_IVB | FDI_TX_ENHANCE_FRAME_ENABLE;
2443         } else {
2444                 temp &= ~FDI_LINK_TRAIN_NONE;
2445                 temp |= FDI_LINK_TRAIN_NONE | FDI_TX_ENHANCE_FRAME_ENABLE;
2446         }
2447         I915_WRITE(reg, temp);
2448
2449         reg = FDI_RX_CTL(pipe);
2450         temp = I915_READ(reg);
2451         if (HAS_PCH_CPT(dev)) {
2452                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2453                 temp |= FDI_LINK_TRAIN_NORMAL_CPT;
2454         } else {
2455                 temp &= ~FDI_LINK_TRAIN_NONE;
2456                 temp |= FDI_LINK_TRAIN_NONE;
2457         }
2458         I915_WRITE(reg, temp | FDI_RX_ENHANCE_FRAME_ENABLE);
2459
2460         /* wait one idle pattern time */
2461         POSTING_READ(reg);
2462         udelay(1000);
2463
2464         /* IVB wants error correction enabled */
2465         if (IS_IVYBRIDGE(dev))
2466                 I915_WRITE(reg, I915_READ(reg) | FDI_FS_ERRC_ENABLE |
2467                            FDI_FE_ERRC_ENABLE);
2468 }
2469
2470 static void ivb_modeset_global_resources(struct drm_device *dev)
2471 {
2472         struct drm_i915_private *dev_priv = dev->dev_private;
2473         struct intel_crtc *pipe_B_crtc =
2474                 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[PIPE_B]);
2475         struct intel_crtc *pipe_C_crtc =
2476                 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[PIPE_C]);
2477         uint32_t temp;
2478
2479         /* When everything is off disable fdi C so that we could enable fdi B
2480          * with all lanes. XXX: This misses the case where a pipe is not using
2481          * any pch resources and so doesn't need any fdi lanes. */
2482         if (!pipe_B_crtc->base.enabled && !pipe_C_crtc->base.enabled) {
2483                 WARN_ON(I915_READ(FDI_RX_CTL(PIPE_B)) & FDI_RX_ENABLE);
2484                 WARN_ON(I915_READ(FDI_RX_CTL(PIPE_C)) & FDI_RX_ENABLE);
2485
2486                 temp = I915_READ(SOUTH_CHICKEN1);
2487                 temp &= ~FDI_BC_BIFURCATION_SELECT;
2488                 DRM_DEBUG_KMS("disabling fdi C rx\n");
2489                 I915_WRITE(SOUTH_CHICKEN1, temp);
2490         }
2491 }
2492
2493 /* The FDI link training functions for ILK/Ibexpeak. */
2494 static void ironlake_fdi_link_train(struct drm_crtc *crtc)
2495 {
2496         struct drm_device *dev = crtc->dev;
2497         struct drm_i915_private *dev_priv = dev->dev_private;
2498         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2499         int pipe = intel_crtc->pipe;
2500         int plane = intel_crtc->plane;
2501         u32 reg, temp, tries;
2502
2503         /* FDI needs bits from pipe & plane first */
2504         assert_pipe_enabled(dev_priv, pipe);
2505         assert_plane_enabled(dev_priv, plane);
2506
2507         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2508            for train result */
2509         reg = FDI_RX_IMR(pipe);
2510         temp = I915_READ(reg);
2511         temp &= ~FDI_RX_SYMBOL_LOCK;
2512         temp &= ~FDI_RX_BIT_LOCK;
2513         I915_WRITE(reg, temp);
2514         I915_READ(reg);
2515         udelay(150);
2516
2517         /* enable CPU FDI TX and PCH FDI RX */
2518         reg = FDI_TX_CTL(pipe);
2519         temp = I915_READ(reg);
2520         temp &= ~(7 << 19);
2521         temp |= (intel_crtc->fdi_lanes - 1) << 19;
2522         temp &= ~FDI_LINK_TRAIN_NONE;
2523         temp |= FDI_LINK_TRAIN_PATTERN_1;
2524         I915_WRITE(reg, temp | FDI_TX_ENABLE);
2525
2526         reg = FDI_RX_CTL(pipe);
2527         temp = I915_READ(reg);
2528         temp &= ~FDI_LINK_TRAIN_NONE;
2529         temp |= FDI_LINK_TRAIN_PATTERN_1;
2530         I915_WRITE(reg, temp | FDI_RX_ENABLE);
2531
2532         POSTING_READ(reg);
2533         udelay(150);
2534
2535         /* Ironlake workaround, enable clock pointer after FDI enable*/
2536         I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR);
2537         I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR |
2538                    FDI_RX_PHASE_SYNC_POINTER_EN);
2539
2540         reg = FDI_RX_IIR(pipe);
2541         for (tries = 0; tries < 5; tries++) {
2542                 temp = I915_READ(reg);
2543                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2544
2545                 if ((temp & FDI_RX_BIT_LOCK)) {
2546                         DRM_DEBUG_KMS("FDI train 1 done.\n");
2547                         I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2548                         break;
2549                 }
2550         }
2551         if (tries == 5)
2552                 DRM_ERROR("FDI train 1 fail!\n");
2553
2554         /* Train 2 */
2555         reg = FDI_TX_CTL(pipe);
2556         temp = I915_READ(reg);
2557         temp &= ~FDI_LINK_TRAIN_NONE;
2558         temp |= FDI_LINK_TRAIN_PATTERN_2;
2559         I915_WRITE(reg, temp);
2560
2561         reg = FDI_RX_CTL(pipe);
2562         temp = I915_READ(reg);
2563         temp &= ~FDI_LINK_TRAIN_NONE;
2564         temp |= FDI_LINK_TRAIN_PATTERN_2;
2565         I915_WRITE(reg, temp);
2566
2567         POSTING_READ(reg);
2568         udelay(150);
2569
2570         reg = FDI_RX_IIR(pipe);
2571         for (tries = 0; tries < 5; tries++) {
2572                 temp = I915_READ(reg);
2573                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2574
2575                 if (temp & FDI_RX_SYMBOL_LOCK) {
2576                         I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2577                         DRM_DEBUG_KMS("FDI train 2 done.\n");
2578                         break;
2579                 }
2580         }
2581         if (tries == 5)
2582                 DRM_ERROR("FDI train 2 fail!\n");
2583
2584         DRM_DEBUG_KMS("FDI train done\n");
2585
2586 }
2587
2588 static const int snb_b_fdi_train_param[] = {
2589         FDI_LINK_TRAIN_400MV_0DB_SNB_B,
2590         FDI_LINK_TRAIN_400MV_6DB_SNB_B,
2591         FDI_LINK_TRAIN_600MV_3_5DB_SNB_B,
2592         FDI_LINK_TRAIN_800MV_0DB_SNB_B,
2593 };
2594
2595 /* The FDI link training functions for SNB/Cougarpoint. */
2596 static void gen6_fdi_link_train(struct drm_crtc *crtc)
2597 {
2598         struct drm_device *dev = crtc->dev;
2599         struct drm_i915_private *dev_priv = dev->dev_private;
2600         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2601         int pipe = intel_crtc->pipe;
2602         u32 reg, temp, i, retry;
2603
2604         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2605            for train result */
2606         reg = FDI_RX_IMR(pipe);
2607         temp = I915_READ(reg);
2608         temp &= ~FDI_RX_SYMBOL_LOCK;
2609         temp &= ~FDI_RX_BIT_LOCK;
2610         I915_WRITE(reg, temp);
2611
2612         POSTING_READ(reg);
2613         udelay(150);
2614
2615         /* enable CPU FDI TX and PCH FDI RX */
2616         reg = FDI_TX_CTL(pipe);
2617         temp = I915_READ(reg);
2618         temp &= ~(7 << 19);
2619         temp |= (intel_crtc->fdi_lanes - 1) << 19;
2620         temp &= ~FDI_LINK_TRAIN_NONE;
2621         temp |= FDI_LINK_TRAIN_PATTERN_1;
2622         temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2623         /* SNB-B */
2624         temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2625         I915_WRITE(reg, temp | FDI_TX_ENABLE);
2626
2627         I915_WRITE(FDI_RX_MISC(pipe),
2628                    FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
2629
2630         reg = FDI_RX_CTL(pipe);
2631         temp = I915_READ(reg);
2632         if (HAS_PCH_CPT(dev)) {
2633                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2634                 temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2635         } else {
2636                 temp &= ~FDI_LINK_TRAIN_NONE;
2637                 temp |= FDI_LINK_TRAIN_PATTERN_1;
2638         }
2639         I915_WRITE(reg, temp | FDI_RX_ENABLE);
2640
2641         POSTING_READ(reg);
2642         udelay(150);
2643
2644         for (i = 0; i < 4; i++) {
2645                 reg = FDI_TX_CTL(pipe);
2646                 temp = I915_READ(reg);
2647                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2648                 temp |= snb_b_fdi_train_param[i];
2649                 I915_WRITE(reg, temp);
2650
2651                 POSTING_READ(reg);
2652                 udelay(500);
2653
2654                 for (retry = 0; retry < 5; retry++) {
2655                         reg = FDI_RX_IIR(pipe);
2656                         temp = I915_READ(reg);
2657                         DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2658                         if (temp & FDI_RX_BIT_LOCK) {
2659                                 I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2660                                 DRM_DEBUG_KMS("FDI train 1 done.\n");
2661                                 break;
2662                         }
2663                         udelay(50);
2664                 }
2665                 if (retry < 5)
2666                         break;
2667         }
2668         if (i == 4)
2669                 DRM_ERROR("FDI train 1 fail!\n");
2670
2671         /* Train 2 */
2672         reg = FDI_TX_CTL(pipe);
2673         temp = I915_READ(reg);
2674         temp &= ~FDI_LINK_TRAIN_NONE;
2675         temp |= FDI_LINK_TRAIN_PATTERN_2;
2676         if (IS_GEN6(dev)) {
2677                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2678                 /* SNB-B */
2679                 temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2680         }
2681         I915_WRITE(reg, temp);
2682
2683         reg = FDI_RX_CTL(pipe);
2684         temp = I915_READ(reg);
2685         if (HAS_PCH_CPT(dev)) {
2686                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2687                 temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
2688         } else {
2689                 temp &= ~FDI_LINK_TRAIN_NONE;
2690                 temp |= FDI_LINK_TRAIN_PATTERN_2;
2691         }
2692         I915_WRITE(reg, temp);
2693
2694         POSTING_READ(reg);
2695         udelay(150);
2696
2697         for (i = 0; i < 4; i++) {
2698                 reg = FDI_TX_CTL(pipe);
2699                 temp = I915_READ(reg);
2700                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2701                 temp |= snb_b_fdi_train_param[i];
2702                 I915_WRITE(reg, temp);
2703
2704                 POSTING_READ(reg);
2705                 udelay(500);
2706
2707                 for (retry = 0; retry < 5; retry++) {
2708                         reg = FDI_RX_IIR(pipe);
2709                         temp = I915_READ(reg);
2710                         DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2711                         if (temp & FDI_RX_SYMBOL_LOCK) {
2712                                 I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2713                                 DRM_DEBUG_KMS("FDI train 2 done.\n");
2714                                 break;
2715                         }
2716                         udelay(50);
2717                 }
2718                 if (retry < 5)
2719                         break;
2720         }
2721         if (i == 4)
2722                 DRM_ERROR("FDI train 2 fail!\n");
2723
2724         DRM_DEBUG_KMS("FDI train done.\n");
2725 }
2726
2727 /* Manual link training for Ivy Bridge A0 parts */
2728 static void ivb_manual_fdi_link_train(struct drm_crtc *crtc)
2729 {
2730         struct drm_device *dev = crtc->dev;
2731         struct drm_i915_private *dev_priv = dev->dev_private;
2732         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2733         int pipe = intel_crtc->pipe;
2734         u32 reg, temp, i;
2735
2736         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2737            for train result */
2738         reg = FDI_RX_IMR(pipe);
2739         temp = I915_READ(reg);
2740         temp &= ~FDI_RX_SYMBOL_LOCK;
2741         temp &= ~FDI_RX_BIT_LOCK;
2742         I915_WRITE(reg, temp);
2743
2744         POSTING_READ(reg);
2745         udelay(150);
2746
2747         DRM_DEBUG_KMS("FDI_RX_IIR before link train 0x%x\n",
2748                       I915_READ(FDI_RX_IIR(pipe)));
2749
2750         /* enable CPU FDI TX and PCH FDI RX */
2751         reg = FDI_TX_CTL(pipe);
2752         temp = I915_READ(reg);
2753         temp &= ~(7 << 19);
2754         temp |= (intel_crtc->fdi_lanes - 1) << 19;
2755         temp &= ~(FDI_LINK_TRAIN_AUTO | FDI_LINK_TRAIN_NONE_IVB);
2756         temp |= FDI_LINK_TRAIN_PATTERN_1_IVB;
2757         temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2758         temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2759         temp |= FDI_COMPOSITE_SYNC;
2760         I915_WRITE(reg, temp | FDI_TX_ENABLE);
2761
2762         I915_WRITE(FDI_RX_MISC(pipe),
2763                    FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
2764
2765         reg = FDI_RX_CTL(pipe);
2766         temp = I915_READ(reg);
2767         temp &= ~FDI_LINK_TRAIN_AUTO;
2768         temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2769         temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2770         temp |= FDI_COMPOSITE_SYNC;
2771         I915_WRITE(reg, temp | FDI_RX_ENABLE);
2772
2773         POSTING_READ(reg);
2774         udelay(150);
2775
2776         for (i = 0; i < 4; i++) {
2777                 reg = FDI_TX_CTL(pipe);
2778                 temp = I915_READ(reg);
2779                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2780                 temp |= snb_b_fdi_train_param[i];
2781                 I915_WRITE(reg, temp);
2782
2783                 POSTING_READ(reg);
2784                 udelay(500);
2785
2786                 reg = FDI_RX_IIR(pipe);
2787                 temp = I915_READ(reg);
2788                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2789
2790                 if (temp & FDI_RX_BIT_LOCK ||
2791                     (I915_READ(reg) & FDI_RX_BIT_LOCK)) {
2792                         I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2793                         DRM_DEBUG_KMS("FDI train 1 done, level %i.\n", i);
2794                         break;
2795                 }
2796         }
2797         if (i == 4)
2798                 DRM_ERROR("FDI train 1 fail!\n");
2799
2800         /* Train 2 */
2801         reg = FDI_TX_CTL(pipe);
2802         temp = I915_READ(reg);
2803         temp &= ~FDI_LINK_TRAIN_NONE_IVB;
2804         temp |= FDI_LINK_TRAIN_PATTERN_2_IVB;
2805         temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2806         temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2807         I915_WRITE(reg, temp);
2808
2809         reg = FDI_RX_CTL(pipe);
2810         temp = I915_READ(reg);
2811         temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2812         temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
2813         I915_WRITE(reg, temp);
2814
2815         POSTING_READ(reg);
2816         udelay(150);
2817
2818         for (i = 0; i < 4; i++) {
2819                 reg = FDI_TX_CTL(pipe);
2820                 temp = I915_READ(reg);
2821                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2822                 temp |= snb_b_fdi_train_param[i];
2823                 I915_WRITE(reg, temp);
2824
2825                 POSTING_READ(reg);
2826                 udelay(500);
2827
2828                 reg = FDI_RX_IIR(pipe);
2829                 temp = I915_READ(reg);
2830                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2831
2832                 if (temp & FDI_RX_SYMBOL_LOCK) {
2833                         I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2834                         DRM_DEBUG_KMS("FDI train 2 done, level %i.\n", i);
2835                         break;
2836                 }
2837         }
2838         if (i == 4)
2839                 DRM_ERROR("FDI train 2 fail!\n");
2840
2841         DRM_DEBUG_KMS("FDI train done.\n");
2842 }
2843
2844 static void ironlake_fdi_pll_enable(struct intel_crtc *intel_crtc)
2845 {
2846         struct drm_device *dev = intel_crtc->base.dev;
2847         struct drm_i915_private *dev_priv = dev->dev_private;
2848         int pipe = intel_crtc->pipe;
2849         u32 reg, temp;
2850
2851
2852         /* enable PCH FDI RX PLL, wait warmup plus DMI latency */
2853         reg = FDI_RX_CTL(pipe);
2854         temp = I915_READ(reg);
2855         temp &= ~((0x7 << 19) | (0x7 << 16));
2856         temp |= (intel_crtc->fdi_lanes - 1) << 19;
2857         temp |= (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
2858         I915_WRITE(reg, temp | FDI_RX_PLL_ENABLE);
2859
2860         POSTING_READ(reg);
2861         udelay(200);
2862
2863         /* Switch from Rawclk to PCDclk */
2864         temp = I915_READ(reg);
2865         I915_WRITE(reg, temp | FDI_PCDCLK);
2866
2867         POSTING_READ(reg);
2868         udelay(200);
2869
2870         /* Enable CPU FDI TX PLL, always on for Ironlake */
2871         reg = FDI_TX_CTL(pipe);
2872         temp = I915_READ(reg);
2873         if ((temp & FDI_TX_PLL_ENABLE) == 0) {
2874                 I915_WRITE(reg, temp | FDI_TX_PLL_ENABLE);
2875
2876                 POSTING_READ(reg);
2877                 udelay(100);
2878         }
2879 }
2880
2881 static void ironlake_fdi_pll_disable(struct intel_crtc *intel_crtc)
2882 {
2883         struct drm_device *dev = intel_crtc->base.dev;
2884         struct drm_i915_private *dev_priv = dev->dev_private;
2885         int pipe = intel_crtc->pipe;
2886         u32 reg, temp;
2887
2888         /* Switch from PCDclk to Rawclk */
2889         reg = FDI_RX_CTL(pipe);
2890         temp = I915_READ(reg);
2891         I915_WRITE(reg, temp & ~FDI_PCDCLK);
2892
2893         /* Disable CPU FDI TX PLL */
2894         reg = FDI_TX_CTL(pipe);
2895         temp = I915_READ(reg);
2896         I915_WRITE(reg, temp & ~FDI_TX_PLL_ENABLE);
2897
2898         POSTING_READ(reg);
2899         udelay(100);
2900
2901         reg = FDI_RX_CTL(pipe);
2902         temp = I915_READ(reg);
2903         I915_WRITE(reg, temp & ~FDI_RX_PLL_ENABLE);
2904
2905         /* Wait for the clocks to turn off. */
2906         POSTING_READ(reg);
2907         udelay(100);
2908 }
2909
2910 static void ironlake_fdi_disable(struct drm_crtc *crtc)
2911 {
2912         struct drm_device *dev = crtc->dev;
2913         struct drm_i915_private *dev_priv = dev->dev_private;
2914         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2915         int pipe = intel_crtc->pipe;
2916         u32 reg, temp;
2917
2918         /* disable CPU FDI tx and PCH FDI rx */
2919         reg = FDI_TX_CTL(pipe);
2920         temp = I915_READ(reg);
2921         I915_WRITE(reg, temp & ~FDI_TX_ENABLE);
2922         POSTING_READ(reg);
2923
2924         reg = FDI_RX_CTL(pipe);
2925         temp = I915_READ(reg);
2926         temp &= ~(0x7 << 16);
2927         temp |= (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
2928         I915_WRITE(reg, temp & ~FDI_RX_ENABLE);
2929
2930         POSTING_READ(reg);
2931         udelay(100);
2932
2933         /* Ironlake workaround, disable clock pointer after downing FDI */
2934         if (HAS_PCH_IBX(dev)) {
2935                 I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR);
2936         }
2937
2938         /* still set train pattern 1 */
2939         reg = FDI_TX_CTL(pipe);
2940         temp = I915_READ(reg);
2941         temp &= ~FDI_LINK_TRAIN_NONE;
2942         temp |= FDI_LINK_TRAIN_PATTERN_1;
2943         I915_WRITE(reg, temp);
2944
2945         reg = FDI_RX_CTL(pipe);
2946         temp = I915_READ(reg);
2947         if (HAS_PCH_CPT(dev)) {
2948                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2949                 temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2950         } else {
2951                 temp &= ~FDI_LINK_TRAIN_NONE;
2952                 temp |= FDI_LINK_TRAIN_PATTERN_1;
2953         }
2954         /* BPC in FDI rx is consistent with that in PIPECONF */
2955         temp &= ~(0x07 << 16);
2956         temp |= (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
2957         I915_WRITE(reg, temp);
2958
2959         POSTING_READ(reg);
2960         udelay(100);
2961 }
2962
2963 static bool intel_crtc_has_pending_flip(struct drm_crtc *crtc)
2964 {
2965         struct drm_device *dev = crtc->dev;
2966         struct drm_i915_private *dev_priv = dev->dev_private;
2967         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2968         unsigned long flags;
2969         bool pending;
2970
2971         if (i915_reset_in_progress(&dev_priv->gpu_error) ||
2972             intel_crtc->reset_counter != atomic_read(&dev_priv->gpu_error.reset_counter))
2973                 return false;
2974
2975         spin_lock_irqsave(&dev->event_lock, flags);
2976         pending = to_intel_crtc(crtc)->unpin_work != NULL;
2977         spin_unlock_irqrestore(&dev->event_lock, flags);
2978
2979         return pending;
2980 }
2981
2982 static void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc)
2983 {
2984         struct drm_device *dev = crtc->dev;
2985         struct drm_i915_private *dev_priv = dev->dev_private;
2986
2987         if (crtc->fb == NULL)
2988                 return;
2989
2990         WARN_ON(waitqueue_active(&dev_priv->pending_flip_queue));
2991
2992         wait_event(dev_priv->pending_flip_queue,
2993                    !intel_crtc_has_pending_flip(crtc));
2994
2995         mutex_lock(&dev->struct_mutex);
2996         intel_finish_fb(crtc->fb);
2997         mutex_unlock(&dev->struct_mutex);
2998 }
2999
3000 /* Program iCLKIP clock to the desired frequency */
3001 static void lpt_program_iclkip(struct drm_crtc *crtc)
3002 {
3003         struct drm_device *dev = crtc->dev;
3004         struct drm_i915_private *dev_priv = dev->dev_private;
3005         u32 divsel, phaseinc, auxdiv, phasedir = 0;
3006         u32 temp;
3007
3008         mutex_lock(&dev_priv->dpio_lock);
3009
3010         /* It is necessary to ungate the pixclk gate prior to programming
3011          * the divisors, and gate it back when it is done.
3012          */
3013         I915_WRITE(PIXCLK_GATE, PIXCLK_GATE_GATE);
3014
3015         /* Disable SSCCTL */
3016         intel_sbi_write(dev_priv, SBI_SSCCTL6,
3017                         intel_sbi_read(dev_priv, SBI_SSCCTL6, SBI_ICLK) |
3018                                 SBI_SSCCTL_DISABLE,
3019                         SBI_ICLK);
3020
3021         /* 20MHz is a corner case which is out of range for the 7-bit divisor */
3022         if (crtc->mode.clock == 20000) {
3023                 auxdiv = 1;
3024                 divsel = 0x41;
3025                 phaseinc = 0x20;
3026         } else {
3027                 /* The iCLK virtual clock root frequency is in MHz,
3028                  * but the crtc->mode.clock in in KHz. To get the divisors,
3029                  * it is necessary to divide one by another, so we
3030                  * convert the virtual clock precision to KHz here for higher
3031                  * precision.
3032                  */
3033                 u32 iclk_virtual_root_freq = 172800 * 1000;
3034                 u32 iclk_pi_range = 64;
3035                 u32 desired_divisor, msb_divisor_value, pi_value;
3036
3037                 desired_divisor = (iclk_virtual_root_freq / crtc->mode.clock);
3038                 msb_divisor_value = desired_divisor / iclk_pi_range;
3039                 pi_value = desired_divisor % iclk_pi_range;
3040
3041                 auxdiv = 0;
3042                 divsel = msb_divisor_value - 2;
3043                 phaseinc = pi_value;
3044         }
3045
3046         /* This should not happen with any sane values */
3047         WARN_ON(SBI_SSCDIVINTPHASE_DIVSEL(divsel) &
3048                 ~SBI_SSCDIVINTPHASE_DIVSEL_MASK);
3049         WARN_ON(SBI_SSCDIVINTPHASE_DIR(phasedir) &
3050                 ~SBI_SSCDIVINTPHASE_INCVAL_MASK);
3051
3052         DRM_DEBUG_KMS("iCLKIP clock: found settings for %dKHz refresh rate: auxdiv=%x, divsel=%x, phasedir=%x, phaseinc=%x\n",
3053                         crtc->mode.clock,
3054                         auxdiv,
3055                         divsel,
3056                         phasedir,
3057                         phaseinc);
3058
3059         /* Program SSCDIVINTPHASE6 */
3060         temp = intel_sbi_read(dev_priv, SBI_SSCDIVINTPHASE6, SBI_ICLK);
3061         temp &= ~SBI_SSCDIVINTPHASE_DIVSEL_MASK;
3062         temp |= SBI_SSCDIVINTPHASE_DIVSEL(divsel);
3063         temp &= ~SBI_SSCDIVINTPHASE_INCVAL_MASK;
3064         temp |= SBI_SSCDIVINTPHASE_INCVAL(phaseinc);
3065         temp |= SBI_SSCDIVINTPHASE_DIR(phasedir);
3066         temp |= SBI_SSCDIVINTPHASE_PROPAGATE;
3067         intel_sbi_write(dev_priv, SBI_SSCDIVINTPHASE6, temp, SBI_ICLK);
3068
3069         /* Program SSCAUXDIV */
3070         temp = intel_sbi_read(dev_priv, SBI_SSCAUXDIV6, SBI_ICLK);
3071         temp &= ~SBI_SSCAUXDIV_FINALDIV2SEL(1);
3072         temp |= SBI_SSCAUXDIV_FINALDIV2SEL(auxdiv);
3073         intel_sbi_write(dev_priv, SBI_SSCAUXDIV6, temp, SBI_ICLK);
3074
3075         /* Enable modulator and associated divider */
3076         temp = intel_sbi_read(dev_priv, SBI_SSCCTL6, SBI_ICLK);
3077         temp &= ~SBI_SSCCTL_DISABLE;
3078         intel_sbi_write(dev_priv, SBI_SSCCTL6, temp, SBI_ICLK);
3079
3080         /* Wait for initialization time */
3081         udelay(24);
3082
3083         I915_WRITE(PIXCLK_GATE, PIXCLK_GATE_UNGATE);
3084
3085         mutex_unlock(&dev_priv->dpio_lock);
3086 }
3087
3088 /*
3089  * Enable PCH resources required for PCH ports:
3090  *   - PCH PLLs
3091  *   - FDI training & RX/TX
3092  *   - update transcoder timings
3093  *   - DP transcoding bits
3094  *   - transcoder
3095  */
3096 static void ironlake_pch_enable(struct drm_crtc *crtc)
3097 {
3098         struct drm_device *dev = crtc->dev;
3099         struct drm_i915_private *dev_priv = dev->dev_private;
3100         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3101         int pipe = intel_crtc->pipe;
3102         u32 reg, temp;
3103
3104         assert_transcoder_disabled(dev_priv, pipe);
3105
3106         /* Write the TU size bits before fdi link training, so that error
3107          * detection works. */
3108         I915_WRITE(FDI_RX_TUSIZE1(pipe),
3109                    I915_READ(PIPE_DATA_M1(pipe)) & TU_SIZE_MASK);
3110
3111         /* For PCH output, training FDI link */
3112         dev_priv->display.fdi_link_train(crtc);
3113
3114         /* XXX: pch pll's can be enabled any time before we enable the PCH
3115          * transcoder, and we actually should do this to not upset any PCH
3116          * transcoder that already use the clock when we share it.
3117          *
3118          * Note that enable_pch_pll tries to do the right thing, but get_pch_pll
3119          * unconditionally resets the pll - we need that to have the right LVDS
3120          * enable sequence. */
3121         ironlake_enable_pch_pll(intel_crtc);
3122
3123         if (HAS_PCH_CPT(dev)) {
3124                 u32 sel;
3125
3126                 temp = I915_READ(PCH_DPLL_SEL);
3127                 switch (pipe) {
3128                 default:
3129                 case 0:
3130                         temp |= TRANSA_DPLL_ENABLE;
3131                         sel = TRANSA_DPLLB_SEL;
3132                         break;
3133                 case 1:
3134                         temp |= TRANSB_DPLL_ENABLE;
3135                         sel = TRANSB_DPLLB_SEL;
3136                         break;
3137                 case 2:
3138                         temp |= TRANSC_DPLL_ENABLE;
3139                         sel = TRANSC_DPLLB_SEL;
3140                         break;
3141                 }
3142                 if (intel_crtc->pch_pll->pll_reg == _PCH_DPLL_B)
3143                         temp |= sel;
3144                 else
3145                         temp &= ~sel;
3146                 I915_WRITE(PCH_DPLL_SEL, temp);
3147         }
3148
3149         /* set transcoder timing, panel must allow it */
3150         assert_panel_unlocked(dev_priv, pipe);
3151         I915_WRITE(TRANS_HTOTAL(pipe), I915_READ(HTOTAL(pipe)));
3152         I915_WRITE(TRANS_HBLANK(pipe), I915_READ(HBLANK(pipe)));
3153         I915_WRITE(TRANS_HSYNC(pipe),  I915_READ(HSYNC(pipe)));
3154
3155         I915_WRITE(TRANS_VTOTAL(pipe), I915_READ(VTOTAL(pipe)));
3156         I915_WRITE(TRANS_VBLANK(pipe), I915_READ(VBLANK(pipe)));
3157         I915_WRITE(TRANS_VSYNC(pipe),  I915_READ(VSYNC(pipe)));
3158         I915_WRITE(TRANS_VSYNCSHIFT(pipe),  I915_READ(VSYNCSHIFT(pipe)));
3159
3160         intel_fdi_normal_train(crtc);
3161
3162         /* For PCH DP, enable TRANS_DP_CTL */
3163         if (HAS_PCH_CPT(dev) &&
3164             (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT) ||
3165              intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))) {
3166                 u32 bpc = (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) >> 5;
3167                 reg = TRANS_DP_CTL(pipe);
3168                 temp = I915_READ(reg);
3169                 temp &= ~(TRANS_DP_PORT_SEL_MASK |
3170                           TRANS_DP_SYNC_MASK |
3171                           TRANS_DP_BPC_MASK);
3172                 temp |= (TRANS_DP_OUTPUT_ENABLE |
3173                          TRANS_DP_ENH_FRAMING);
3174                 temp |= bpc << 9; /* same format but at 11:9 */
3175
3176                 if (crtc->mode.flags & DRM_MODE_FLAG_PHSYNC)
3177                         temp |= TRANS_DP_HSYNC_ACTIVE_HIGH;
3178                 if (crtc->mode.flags & DRM_MODE_FLAG_PVSYNC)
3179                         temp |= TRANS_DP_VSYNC_ACTIVE_HIGH;
3180
3181                 switch (intel_trans_dp_port_sel(crtc)) {
3182                 case PCH_DP_B:
3183                         temp |= TRANS_DP_PORT_SEL_B;
3184                         break;
3185                 case PCH_DP_C:
3186                         temp |= TRANS_DP_PORT_SEL_C;
3187                         break;
3188                 case PCH_DP_D:
3189                         temp |= TRANS_DP_PORT_SEL_D;
3190                         break;
3191                 default:
3192                         BUG();
3193                 }
3194
3195                 I915_WRITE(reg, temp);
3196         }
3197
3198         ironlake_enable_pch_transcoder(dev_priv, pipe);
3199 }
3200
3201 static void lpt_pch_enable(struct drm_crtc *crtc)
3202 {
3203         struct drm_device *dev = crtc->dev;
3204         struct drm_i915_private *dev_priv = dev->dev_private;
3205         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3206         enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
3207
3208         assert_transcoder_disabled(dev_priv, TRANSCODER_A);
3209
3210         lpt_program_iclkip(crtc);
3211
3212         /* Set transcoder timing. */
3213         I915_WRITE(_TRANS_HTOTAL_A, I915_READ(HTOTAL(cpu_transcoder)));
3214         I915_WRITE(_TRANS_HBLANK_A, I915_READ(HBLANK(cpu_transcoder)));
3215         I915_WRITE(_TRANS_HSYNC_A,  I915_READ(HSYNC(cpu_transcoder)));
3216
3217         I915_WRITE(_TRANS_VTOTAL_A, I915_READ(VTOTAL(cpu_transcoder)));
3218         I915_WRITE(_TRANS_VBLANK_A, I915_READ(VBLANK(cpu_transcoder)));
3219         I915_WRITE(_TRANS_VSYNC_A,  I915_READ(VSYNC(cpu_transcoder)));
3220         I915_WRITE(_TRANS_VSYNCSHIFT_A, I915_READ(VSYNCSHIFT(cpu_transcoder)));
3221
3222         lpt_enable_pch_transcoder(dev_priv, cpu_transcoder);
3223 }
3224
3225 static void intel_put_pch_pll(struct intel_crtc *intel_crtc)
3226 {
3227         struct intel_pch_pll *pll = intel_crtc->pch_pll;
3228
3229         if (pll == NULL)
3230                 return;
3231
3232         if (pll->refcount == 0) {
3233                 WARN(1, "bad PCH PLL refcount\n");
3234                 return;
3235         }
3236
3237         --pll->refcount;
3238         intel_crtc->pch_pll = NULL;
3239 }
3240
3241 static struct intel_pch_pll *intel_get_pch_pll(struct intel_crtc *intel_crtc, u32 dpll, u32 fp)
3242 {
3243         struct drm_i915_private *dev_priv = intel_crtc->base.dev->dev_private;
3244         struct intel_pch_pll *pll;
3245         int i;
3246
3247         pll = intel_crtc->pch_pll;
3248         if (pll) {
3249                 DRM_DEBUG_KMS("CRTC:%d reusing existing PCH PLL %x\n",
3250                               intel_crtc->base.base.id, pll->pll_reg);
3251                 goto prepare;
3252         }
3253
3254         if (HAS_PCH_IBX(dev_priv->dev)) {
3255                 /* Ironlake PCH has a fixed PLL->PCH pipe mapping. */
3256                 i = intel_crtc->pipe;
3257                 pll = &dev_priv->pch_plls[i];
3258
3259                 DRM_DEBUG_KMS("CRTC:%d using pre-allocated PCH PLL %x\n",
3260                               intel_crtc->base.base.id, pll->pll_reg);
3261
3262                 goto found;
3263         }
3264
3265         for (i = 0; i < dev_priv->num_pch_pll; i++) {
3266                 pll = &dev_priv->pch_plls[i];
3267
3268                 /* Only want to check enabled timings first */
3269                 if (pll->refcount == 0)
3270                         continue;
3271
3272                 if (dpll == (I915_READ(pll->pll_reg) & 0x7fffffff) &&
3273                     fp == I915_READ(pll->fp0_reg)) {
3274                         DRM_DEBUG_KMS("CRTC:%d sharing existing PCH PLL %x (refcount %d, ative %d)\n",
3275                                       intel_crtc->base.base.id,
3276                                       pll->pll_reg, pll->refcount, pll->active);
3277
3278                         goto found;
3279                 }
3280         }
3281
3282         /* Ok no matching timings, maybe there's a free one? */
3283         for (i = 0; i < dev_priv->num_pch_pll; i++) {
3284                 pll = &dev_priv->pch_plls[i];
3285                 if (pll->refcount == 0) {
3286                         DRM_DEBUG_KMS("CRTC:%d allocated PCH PLL %x\n",
3287                                       intel_crtc->base.base.id, pll->pll_reg);
3288                         goto found;
3289                 }
3290         }
3291
3292         return NULL;
3293
3294 found:
3295         intel_crtc->pch_pll = pll;
3296         pll->refcount++;
3297         DRM_DEBUG_DRIVER("using pll %d for pipe %d\n", i, intel_crtc->pipe);
3298 prepare: /* separate function? */
3299         DRM_DEBUG_DRIVER("switching PLL %x off\n", pll->pll_reg);
3300
3301         /* Wait for the clocks to stabilize before rewriting the regs */
3302         I915_WRITE(pll->pll_reg, dpll & ~DPLL_VCO_ENABLE);
3303         POSTING_READ(pll->pll_reg);
3304         udelay(150);
3305
3306         I915_WRITE(pll->fp0_reg, fp);
3307         I915_WRITE(pll->pll_reg, dpll & ~DPLL_VCO_ENABLE);
3308         pll->on = false;
3309         return pll;
3310 }
3311
3312 void intel_cpt_verify_modeset(struct drm_device *dev, int pipe)
3313 {
3314         struct drm_i915_private *dev_priv = dev->dev_private;
3315         int dslreg = PIPEDSL(pipe);
3316         u32 temp;
3317
3318         temp = I915_READ(dslreg);
3319         udelay(500);
3320         if (wait_for(I915_READ(dslreg) != temp, 5)) {
3321                 if (wait_for(I915_READ(dslreg) != temp, 5))
3322                         DRM_ERROR("mode set failed: pipe %d stuck\n", pipe);
3323         }
3324 }
3325
3326 static void ironlake_crtc_enable(struct drm_crtc *crtc)
3327 {
3328         struct drm_device *dev = crtc->dev;
3329         struct drm_i915_private *dev_priv = dev->dev_private;
3330         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3331         struct intel_encoder *encoder;
3332         int pipe = intel_crtc->pipe;
3333         int plane = intel_crtc->plane;
3334         u32 temp;
3335
3336         WARN_ON(!crtc->enabled);
3337
3338         if (intel_crtc->active)
3339                 return;
3340
3341         intel_crtc->active = true;
3342         intel_update_watermarks(dev);
3343
3344         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
3345                 temp = I915_READ(PCH_LVDS);
3346                 if ((temp & LVDS_PORT_EN) == 0)
3347                         I915_WRITE(PCH_LVDS, temp | LVDS_PORT_EN);
3348         }
3349
3350
3351         if (intel_crtc->config.has_pch_encoder) {
3352                 /* Note: FDI PLL enabling _must_ be done before we enable the
3353                  * cpu pipes, hence this is separate from all the other fdi/pch
3354                  * enabling. */
3355                 ironlake_fdi_pll_enable(intel_crtc);
3356         } else {
3357                 assert_fdi_tx_disabled(dev_priv, pipe);
3358                 assert_fdi_rx_disabled(dev_priv, pipe);
3359         }
3360
3361         for_each_encoder_on_crtc(dev, crtc, encoder)
3362                 if (encoder->pre_enable)
3363                         encoder->pre_enable(encoder);
3364
3365         /* Enable panel fitting for LVDS */
3366         if (dev_priv->pch_pf_size &&
3367             (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) ||
3368              intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))) {
3369                 /* Force use of hard-coded filter coefficients
3370                  * as some pre-programmed values are broken,
3371                  * e.g. x201.
3372                  */
3373                 if (IS_IVYBRIDGE(dev))
3374                         I915_WRITE(PF_CTL(pipe), PF_ENABLE | PF_FILTER_MED_3x3 |
3375                                                  PF_PIPE_SEL_IVB(pipe));
3376                 else
3377                         I915_WRITE(PF_CTL(pipe), PF_ENABLE | PF_FILTER_MED_3x3);
3378                 I915_WRITE(PF_WIN_POS(pipe), dev_priv->pch_pf_pos);
3379                 I915_WRITE(PF_WIN_SZ(pipe), dev_priv->pch_pf_size);
3380         }
3381
3382         /*
3383          * On ILK+ LUT must be loaded before the pipe is running but with
3384          * clocks enabled
3385          */
3386         intel_crtc_load_lut(crtc);
3387
3388         intel_enable_pipe(dev_priv, pipe,
3389                           intel_crtc->config.has_pch_encoder);
3390         intel_enable_plane(dev_priv, plane, pipe);
3391
3392         if (intel_crtc->config.has_pch_encoder)
3393                 ironlake_pch_enable(crtc);
3394
3395         mutex_lock(&dev->struct_mutex);
3396         intel_update_fbc(dev);
3397         mutex_unlock(&dev->struct_mutex);
3398
3399         intel_crtc_update_cursor(crtc, true);
3400
3401         for_each_encoder_on_crtc(dev, crtc, encoder)
3402                 encoder->enable(encoder);
3403
3404         if (HAS_PCH_CPT(dev))
3405                 intel_cpt_verify_modeset(dev, intel_crtc->pipe);
3406
3407         /*
3408          * There seems to be a race in PCH platform hw (at least on some
3409          * outputs) where an enabled pipe still completes any pageflip right
3410          * away (as if the pipe is off) instead of waiting for vblank. As soon
3411          * as the first vblank happend, everything works as expected. Hence just
3412          * wait for one vblank before returning to avoid strange things
3413          * happening.
3414          */
3415         intel_wait_for_vblank(dev, intel_crtc->pipe);
3416 }
3417
3418 static void haswell_crtc_enable(struct drm_crtc *crtc)
3419 {
3420         struct drm_device *dev = crtc->dev;
3421         struct drm_i915_private *dev_priv = dev->dev_private;
3422         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3423         struct intel_encoder *encoder;
3424         int pipe = intel_crtc->pipe;
3425         int plane = intel_crtc->plane;
3426
3427         WARN_ON(!crtc->enabled);
3428
3429         if (intel_crtc->active)
3430                 return;
3431
3432         intel_crtc->active = true;
3433         intel_update_watermarks(dev);
3434
3435         if (intel_crtc->config.has_pch_encoder)
3436                 dev_priv->display.fdi_link_train(crtc);
3437
3438         for_each_encoder_on_crtc(dev, crtc, encoder)
3439                 if (encoder->pre_enable)
3440                         encoder->pre_enable(encoder);
3441
3442         intel_ddi_enable_pipe_clock(intel_crtc);
3443
3444         /* Enable panel fitting for eDP */
3445         if (dev_priv->pch_pf_size &&
3446             intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP)) {
3447                 /* Force use of hard-coded filter coefficients
3448                  * as some pre-programmed values are broken,
3449                  * e.g. x201.
3450                  */
3451                 I915_WRITE(PF_CTL(pipe), PF_ENABLE | PF_FILTER_MED_3x3 |
3452                                          PF_PIPE_SEL_IVB(pipe));
3453                 I915_WRITE(PF_WIN_POS(pipe), dev_priv->pch_pf_pos);
3454                 I915_WRITE(PF_WIN_SZ(pipe), dev_priv->pch_pf_size);
3455         }
3456
3457         /*
3458          * On ILK+ LUT must be loaded before the pipe is running but with
3459          * clocks enabled
3460          */
3461         intel_crtc_load_lut(crtc);
3462
3463         intel_ddi_set_pipe_settings(crtc);
3464         intel_ddi_enable_transcoder_func(crtc);
3465
3466         intel_enable_pipe(dev_priv, pipe,
3467                           intel_crtc->config.has_pch_encoder);
3468         intel_enable_plane(dev_priv, plane, pipe);
3469
3470         if (intel_crtc->config.has_pch_encoder)
3471                 lpt_pch_enable(crtc);
3472
3473         mutex_lock(&dev->struct_mutex);
3474         intel_update_fbc(dev);
3475         mutex_unlock(&dev->struct_mutex);
3476
3477         intel_crtc_update_cursor(crtc, true);
3478
3479         for_each_encoder_on_crtc(dev, crtc, encoder)
3480                 encoder->enable(encoder);
3481
3482         /*
3483          * There seems to be a race in PCH platform hw (at least on some
3484          * outputs) where an enabled pipe still completes any pageflip right
3485          * away (as if the pipe is off) instead of waiting for vblank. As soon
3486          * as the first vblank happend, everything works as expected. Hence just
3487          * wait for one vblank before returning to avoid strange things
3488          * happening.
3489          */
3490         intel_wait_for_vblank(dev, intel_crtc->pipe);
3491 }
3492
3493 static void ironlake_crtc_disable(struct drm_crtc *crtc)
3494 {
3495         struct drm_device *dev = crtc->dev;
3496         struct drm_i915_private *dev_priv = dev->dev_private;
3497         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3498         struct intel_encoder *encoder;
3499         int pipe = intel_crtc->pipe;
3500         int plane = intel_crtc->plane;
3501         u32 reg, temp;
3502
3503
3504         if (!intel_crtc->active)
3505                 return;
3506
3507         for_each_encoder_on_crtc(dev, crtc, encoder)
3508                 encoder->disable(encoder);
3509
3510         intel_crtc_wait_for_pending_flips(crtc);
3511         drm_vblank_off(dev, pipe);
3512         intel_crtc_update_cursor(crtc, false);
3513
3514         intel_disable_plane(dev_priv, plane, pipe);
3515
3516         if (dev_priv->cfb_plane == plane)
3517                 intel_disable_fbc(dev);
3518
3519         intel_disable_pipe(dev_priv, pipe);
3520
3521         /* Disable PF */
3522         I915_WRITE(PF_CTL(pipe), 0);
3523         I915_WRITE(PF_WIN_SZ(pipe), 0);
3524
3525         for_each_encoder_on_crtc(dev, crtc, encoder)
3526                 if (encoder->post_disable)
3527                         encoder->post_disable(encoder);
3528
3529         ironlake_fdi_disable(crtc);
3530
3531         ironlake_disable_pch_transcoder(dev_priv, pipe);
3532
3533         if (HAS_PCH_CPT(dev)) {
3534                 /* disable TRANS_DP_CTL */
3535                 reg = TRANS_DP_CTL(pipe);
3536                 temp = I915_READ(reg);
3537                 temp &= ~(TRANS_DP_OUTPUT_ENABLE | TRANS_DP_PORT_SEL_MASK);
3538                 temp |= TRANS_DP_PORT_SEL_NONE;
3539                 I915_WRITE(reg, temp);
3540
3541                 /* disable DPLL_SEL */
3542                 temp = I915_READ(PCH_DPLL_SEL);
3543                 switch (pipe) {
3544                 case 0:
3545                         temp &= ~(TRANSA_DPLL_ENABLE | TRANSA_DPLLB_SEL);
3546                         break;
3547                 case 1:
3548                         temp &= ~(TRANSB_DPLL_ENABLE | TRANSB_DPLLB_SEL);
3549                         break;
3550                 case 2:
3551                         /* C shares PLL A or B */
3552                         temp &= ~(TRANSC_DPLL_ENABLE | TRANSC_DPLLB_SEL);
3553                         break;
3554                 default:
3555                         BUG(); /* wtf */
3556                 }
3557                 I915_WRITE(PCH_DPLL_SEL, temp);
3558         }
3559
3560         /* disable PCH DPLL */
3561         intel_disable_pch_pll(intel_crtc);
3562
3563         ironlake_fdi_pll_disable(intel_crtc);
3564
3565         intel_crtc->active = false;
3566         intel_update_watermarks(dev);
3567
3568         mutex_lock(&dev->struct_mutex);
3569         intel_update_fbc(dev);
3570         mutex_unlock(&dev->struct_mutex);
3571 }
3572
3573 static void haswell_crtc_disable(struct drm_crtc *crtc)
3574 {
3575         struct drm_device *dev = crtc->dev;
3576         struct drm_i915_private *dev_priv = dev->dev_private;
3577         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3578         struct intel_encoder *encoder;
3579         int pipe = intel_crtc->pipe;
3580         int plane = intel_crtc->plane;
3581         enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
3582
3583         if (!intel_crtc->active)
3584                 return;
3585
3586         for_each_encoder_on_crtc(dev, crtc, encoder)
3587                 encoder->disable(encoder);
3588
3589         intel_crtc_wait_for_pending_flips(crtc);
3590         drm_vblank_off(dev, pipe);
3591         intel_crtc_update_cursor(crtc, false);
3592
3593         intel_disable_plane(dev_priv, plane, pipe);
3594
3595         if (dev_priv->cfb_plane == plane)
3596                 intel_disable_fbc(dev);
3597
3598         intel_disable_pipe(dev_priv, pipe);
3599
3600         intel_ddi_disable_transcoder_func(dev_priv, cpu_transcoder);
3601
3602         /* XXX: Once we have proper panel fitter state tracking implemented with
3603          * hardware state read/check support we should switch to only disable
3604          * the panel fitter when we know it's used. */
3605         if (intel_using_power_well(dev)) {
3606                 I915_WRITE(PF_CTL(pipe), 0);
3607                 I915_WRITE(PF_WIN_SZ(pipe), 0);
3608         }
3609
3610         intel_ddi_disable_pipe_clock(intel_crtc);
3611
3612         for_each_encoder_on_crtc(dev, crtc, encoder)
3613                 if (encoder->post_disable)
3614                         encoder->post_disable(encoder);
3615
3616         if (intel_crtc->config.has_pch_encoder) {
3617                 lpt_disable_pch_transcoder(dev_priv);
3618                 intel_ddi_fdi_disable(crtc);
3619         }
3620
3621         intel_crtc->active = false;
3622         intel_update_watermarks(dev);
3623
3624         mutex_lock(&dev->struct_mutex);
3625         intel_update_fbc(dev);
3626         mutex_unlock(&dev->struct_mutex);
3627 }
3628
3629 static void ironlake_crtc_off(struct drm_crtc *crtc)
3630 {
3631         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3632         intel_put_pch_pll(intel_crtc);
3633 }
3634
3635 static void haswell_crtc_off(struct drm_crtc *crtc)
3636 {
3637         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3638
3639         /* Stop saying we're using TRANSCODER_EDP because some other CRTC might
3640          * start using it. */
3641         intel_crtc->config.cpu_transcoder = (enum transcoder) intel_crtc->pipe;
3642
3643         intel_ddi_put_crtc_pll(crtc);
3644 }
3645
3646 static void intel_crtc_dpms_overlay(struct intel_crtc *intel_crtc, bool enable)
3647 {
3648         if (!enable && intel_crtc->overlay) {
3649                 struct drm_device *dev = intel_crtc->base.dev;
3650                 struct drm_i915_private *dev_priv = dev->dev_private;
3651
3652                 mutex_lock(&dev->struct_mutex);
3653                 dev_priv->mm.interruptible = false;
3654                 (void) intel_overlay_switch_off(intel_crtc->overlay);
3655                 dev_priv->mm.interruptible = true;
3656                 mutex_unlock(&dev->struct_mutex);
3657         }
3658
3659         /* Let userspace switch the overlay on again. In most cases userspace
3660          * has to recompute where to put it anyway.
3661          */
3662 }
3663
3664 /**
3665  * i9xx_fixup_plane - ugly workaround for G45 to fire up the hardware
3666  * cursor plane briefly if not already running after enabling the display
3667  * plane.
3668  * This workaround avoids occasional blank screens when self refresh is
3669  * enabled.
3670  */
3671 static void
3672 g4x_fixup_plane(struct drm_i915_private *dev_priv, enum pipe pipe)
3673 {
3674         u32 cntl = I915_READ(CURCNTR(pipe));
3675
3676         if ((cntl & CURSOR_MODE) == 0) {
3677                 u32 fw_bcl_self = I915_READ(FW_BLC_SELF);
3678
3679                 I915_WRITE(FW_BLC_SELF, fw_bcl_self & ~FW_BLC_SELF_EN);
3680                 I915_WRITE(CURCNTR(pipe), CURSOR_MODE_64_ARGB_AX);
3681                 intel_wait_for_vblank(dev_priv->dev, pipe);
3682                 I915_WRITE(CURCNTR(pipe), cntl);
3683                 I915_WRITE(CURBASE(pipe), I915_READ(CURBASE(pipe)));
3684                 I915_WRITE(FW_BLC_SELF, fw_bcl_self);
3685         }
3686 }
3687
3688 static void i9xx_crtc_enable(struct drm_crtc *crtc)
3689 {
3690         struct drm_device *dev = crtc->dev;
3691         struct drm_i915_private *dev_priv = dev->dev_private;
3692         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3693         struct intel_encoder *encoder;
3694         int pipe = intel_crtc->pipe;
3695         int plane = intel_crtc->plane;
3696
3697         WARN_ON(!crtc->enabled);
3698
3699         if (intel_crtc->active)
3700                 return;
3701
3702         intel_crtc->active = true;
3703         intel_update_watermarks(dev);
3704
3705         intel_enable_pll(dev_priv, pipe);
3706
3707         for_each_encoder_on_crtc(dev, crtc, encoder)
3708                 if (encoder->pre_enable)
3709                         encoder->pre_enable(encoder);
3710
3711         intel_enable_pipe(dev_priv, pipe, false);
3712         intel_enable_plane(dev_priv, plane, pipe);
3713         if (IS_G4X(dev))
3714                 g4x_fixup_plane(dev_priv, pipe);
3715
3716         intel_crtc_load_lut(crtc);
3717         intel_update_fbc(dev);
3718
3719         /* Give the overlay scaler a chance to enable if it's on this pipe */
3720         intel_crtc_dpms_overlay(intel_crtc, true);
3721         intel_crtc_update_cursor(crtc, true);
3722
3723         for_each_encoder_on_crtc(dev, crtc, encoder)
3724                 encoder->enable(encoder);
3725 }
3726
3727 static void i9xx_pfit_disable(struct intel_crtc *crtc)
3728 {
3729         struct drm_device *dev = crtc->base.dev;
3730         struct drm_i915_private *dev_priv = dev->dev_private;
3731         enum pipe pipe;
3732         uint32_t pctl = I915_READ(PFIT_CONTROL);
3733
3734         assert_pipe_disabled(dev_priv, crtc->pipe);
3735
3736         if (INTEL_INFO(dev)->gen >= 4)
3737                 pipe = (pctl & PFIT_PIPE_MASK) >> PFIT_PIPE_SHIFT;
3738         else
3739                 pipe = PIPE_B;
3740
3741         if (pipe == crtc->pipe) {
3742                 DRM_DEBUG_DRIVER("disabling pfit, current: 0x%08x\n", pctl);
3743                 I915_WRITE(PFIT_CONTROL, 0);
3744         }
3745 }
3746
3747 static void i9xx_crtc_disable(struct drm_crtc *crtc)
3748 {
3749         struct drm_device *dev = crtc->dev;
3750         struct drm_i915_private *dev_priv = dev->dev_private;
3751         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3752         struct intel_encoder *encoder;
3753         int pipe = intel_crtc->pipe;
3754         int plane = intel_crtc->plane;
3755
3756         if (!intel_crtc->active)
3757                 return;
3758
3759         for_each_encoder_on_crtc(dev, crtc, encoder)
3760                 encoder->disable(encoder);
3761
3762         /* Give the overlay scaler a chance to disable if it's on this pipe */
3763         intel_crtc_wait_for_pending_flips(crtc);
3764         drm_vblank_off(dev, pipe);
3765         intel_crtc_dpms_overlay(intel_crtc, false);
3766         intel_crtc_update_cursor(crtc, false);
3767
3768         if (dev_priv->cfb_plane == plane)
3769                 intel_disable_fbc(dev);
3770
3771         intel_disable_plane(dev_priv, plane, pipe);
3772         intel_disable_pipe(dev_priv, pipe);
3773
3774         i9xx_pfit_disable(intel_crtc);
3775
3776         intel_disable_pll(dev_priv, pipe);
3777
3778         intel_crtc->active = false;
3779         intel_update_fbc(dev);
3780         intel_update_watermarks(dev);
3781 }
3782
3783 static void i9xx_crtc_off(struct drm_crtc *crtc)
3784 {
3785 }
3786
3787 static void intel_crtc_update_sarea(struct drm_crtc *crtc,
3788                                     bool enabled)
3789 {
3790         struct drm_device *dev = crtc->dev;
3791         struct drm_i915_master_private *master_priv;
3792         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3793         int pipe = intel_crtc->pipe;
3794
3795         if (!dev->primary->master)
3796                 return;
3797
3798         master_priv = dev->primary->master->driver_priv;
3799         if (!master_priv->sarea_priv)
3800                 return;
3801
3802         switch (pipe) {
3803         case 0:
3804                 master_priv->sarea_priv->pipeA_w = enabled ? crtc->mode.hdisplay : 0;
3805                 master_priv->sarea_priv->pipeA_h = enabled ? crtc->mode.vdisplay : 0;
3806                 break;
3807         case 1:
3808                 master_priv->sarea_priv->pipeB_w = enabled ? crtc->mode.hdisplay : 0;
3809                 master_priv->sarea_priv->pipeB_h = enabled ? crtc->mode.vdisplay : 0;
3810                 break;
3811         default:
3812                 DRM_ERROR("Can't update pipe %c in SAREA\n", pipe_name(pipe));
3813                 break;
3814         }
3815 }
3816
3817 /**
3818  * Sets the power management mode of the pipe and plane.
3819  */
3820 void intel_crtc_update_dpms(struct drm_crtc *crtc)
3821 {
3822         struct drm_device *dev = crtc->dev;
3823         struct drm_i915_private *dev_priv = dev->dev_private;
3824         struct intel_encoder *intel_encoder;
3825         bool enable = false;
3826
3827         for_each_encoder_on_crtc(dev, crtc, intel_encoder)
3828                 enable |= intel_encoder->connectors_active;
3829
3830         if (enable)
3831                 dev_priv->display.crtc_enable(crtc);
3832         else
3833                 dev_priv->display.crtc_disable(crtc);
3834
3835         intel_crtc_update_sarea(crtc, enable);
3836 }
3837
3838 static void intel_crtc_disable(struct drm_crtc *crtc)
3839 {
3840         struct drm_device *dev = crtc->dev;
3841         struct drm_connector *connector;
3842         struct drm_i915_private *dev_priv = dev->dev_private;
3843         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3844
3845         /* crtc should still be enabled when we disable it. */
3846         WARN_ON(!crtc->enabled);
3847
3848         intel_crtc->eld_vld = false;
3849         dev_priv->display.crtc_disable(crtc);
3850         intel_crtc_update_sarea(crtc, false);
3851         dev_priv->display.off(crtc);
3852
3853         assert_plane_disabled(dev->dev_private, to_intel_crtc(crtc)->plane);
3854         assert_pipe_disabled(dev->dev_private, to_intel_crtc(crtc)->pipe);
3855
3856         if (crtc->fb) {
3857                 mutex_lock(&dev->struct_mutex);
3858                 intel_unpin_fb_obj(to_intel_framebuffer(crtc->fb)->obj);
3859                 mutex_unlock(&dev->struct_mutex);
3860                 crtc->fb = NULL;
3861         }
3862
3863         /* Update computed state. */
3864         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
3865                 if (!connector->encoder || !connector->encoder->crtc)
3866                         continue;
3867
3868                 if (connector->encoder->crtc != crtc)
3869                         continue;
3870
3871                 connector->dpms = DRM_MODE_DPMS_OFF;
3872                 to_intel_encoder(connector->encoder)->connectors_active = false;
3873         }
3874 }
3875
3876 void intel_modeset_disable(struct drm_device *dev)
3877 {
3878         struct drm_crtc *crtc;
3879
3880         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
3881                 if (crtc->enabled)
3882                         intel_crtc_disable(crtc);
3883         }
3884 }
3885
3886 void intel_encoder_destroy(struct drm_encoder *encoder)
3887 {
3888         struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
3889
3890         drm_encoder_cleanup(encoder);
3891         kfree(intel_encoder);
3892 }
3893
3894 /* Simple dpms helper for encodres with just one connector, no cloning and only
3895  * one kind of off state. It clamps all !ON modes to fully OFF and changes the
3896  * state of the entire output pipe. */
3897 void intel_encoder_dpms(struct intel_encoder *encoder, int mode)
3898 {
3899         if (mode == DRM_MODE_DPMS_ON) {
3900                 encoder->connectors_active = true;
3901
3902                 intel_crtc_update_dpms(encoder->base.crtc);
3903         } else {
3904                 encoder->connectors_active = false;
3905
3906                 intel_crtc_update_dpms(encoder->base.crtc);
3907         }
3908 }
3909
3910 /* Cross check the actual hw state with our own modeset state tracking (and it's
3911  * internal consistency). */
3912 static void intel_connector_check_state(struct intel_connector *connector)
3913 {
3914         if (connector->get_hw_state(connector)) {
3915                 struct intel_encoder *encoder = connector->encoder;
3916                 struct drm_crtc *crtc;
3917                 bool encoder_enabled;
3918                 enum pipe pipe;
3919
3920                 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
3921                               connector->base.base.id,
3922                               drm_get_connector_name(&connector->base));
3923
3924                 WARN(connector->base.dpms == DRM_MODE_DPMS_OFF,
3925                      "wrong connector dpms state\n");
3926                 WARN(connector->base.encoder != &encoder->base,
3927                      "active connector not linked to encoder\n");
3928                 WARN(!encoder->connectors_active,
3929                      "encoder->connectors_active not set\n");
3930
3931                 encoder_enabled = encoder->get_hw_state(encoder, &pipe);
3932                 WARN(!encoder_enabled, "encoder not enabled\n");
3933                 if (WARN_ON(!encoder->base.crtc))
3934                         return;
3935
3936                 crtc = encoder->base.crtc;
3937
3938                 WARN(!crtc->enabled, "crtc not enabled\n");
3939                 WARN(!to_intel_crtc(crtc)->active, "crtc not active\n");
3940                 WARN(pipe != to_intel_crtc(crtc)->pipe,
3941                      "encoder active on the wrong pipe\n");
3942         }
3943 }
3944
3945 /* Even simpler default implementation, if there's really no special case to
3946  * consider. */
3947 void intel_connector_dpms(struct drm_connector *connector, int mode)
3948 {
3949         /* All the simple cases only support two dpms states. */
3950         if (mode != DRM_MODE_DPMS_ON)
3951                 mode = DRM_MODE_DPMS_OFF;
3952
3953         if (mode == connector->dpms)
3954                 return;
3955
3956         connector->dpms = mode;
3957
3958         /* Only need to change hw state when actually enabled */
3959         if (connector->encoder)
3960                 intel_encoder_dpms(to_intel_encoder(connector->encoder), mode);
3961
3962         intel_modeset_check_state(connector->dev);
3963 }
3964
3965 /* Simple connector->get_hw_state implementation for encoders that support only
3966  * one connector and no cloning and hence the encoder state determines the state
3967  * of the connector. */
3968 bool intel_connector_get_hw_state(struct intel_connector *connector)
3969 {
3970         enum pipe pipe = 0;
3971         struct intel_encoder *encoder = connector->encoder;
3972
3973         return encoder->get_hw_state(encoder, &pipe);
3974 }
3975
3976 static bool intel_crtc_compute_config(struct drm_crtc *crtc,
3977                                       struct intel_crtc_config *pipe_config)
3978 {
3979         struct drm_device *dev = crtc->dev;
3980         struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
3981
3982         if (HAS_PCH_SPLIT(dev)) {
3983                 /* FDI link clock is fixed at 2.7G */
3984                 if (pipe_config->requested_mode.clock * 3
3985                     > IRONLAKE_FDI_FREQ * 4)
3986                         return false;
3987         }
3988
3989         /* All interlaced capable intel hw wants timings in frames. Note though
3990          * that intel_lvds_mode_fixup does some funny tricks with the crtc
3991          * timings, so we need to be careful not to clobber these.*/
3992         if (!pipe_config->timings_set)
3993                 drm_mode_set_crtcinfo(adjusted_mode, 0);
3994
3995         /* WaPruneModeWithIncorrectHsyncOffset: Cantiga+ cannot handle modes
3996          * with a hsync front porch of 0.
3997          */
3998         if ((INTEL_INFO(dev)->gen > 4 || IS_G4X(dev)) &&
3999                 adjusted_mode->hsync_start == adjusted_mode->hdisplay)
4000                 return false;
4001
4002         if ((IS_G4X(dev) || IS_VALLEYVIEW(dev)) && pipe_config->pipe_bpp > 10*3) {
4003                 pipe_config->pipe_bpp = 10*3; /* 12bpc is gen5+ */
4004         } else if (INTEL_INFO(dev)->gen <= 4 && pipe_config->pipe_bpp > 8*3) {
4005                 /* only a 8bpc pipe, with 6bpc dither through the panel fitter
4006                  * for lvds. */
4007                 pipe_config->pipe_bpp = 8*3;
4008         }
4009
4010         return true;
4011 }
4012
4013 static int valleyview_get_display_clock_speed(struct drm_device *dev)
4014 {
4015         return 400000; /* FIXME */
4016 }
4017
4018 static int i945_get_display_clock_speed(struct drm_device *dev)
4019 {
4020         return 400000;
4021 }
4022
4023 static int i915_get_display_clock_speed(struct drm_device *dev)
4024 {
4025         return 333000;
4026 }
4027
4028 static int i9xx_misc_get_display_clock_speed(struct drm_device *dev)
4029 {
4030         return 200000;
4031 }
4032
4033 static int i915gm_get_display_clock_speed(struct drm_device *dev)
4034 {
4035         u16 gcfgc = 0;
4036
4037         pci_read_config_word(dev->pdev, GCFGC, &gcfgc);
4038
4039         if (gcfgc & GC_LOW_FREQUENCY_ENABLE)
4040                 return 133000;
4041         else {
4042                 switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
4043                 case GC_DISPLAY_CLOCK_333_MHZ:
4044                         return 333000;
4045                 default:
4046                 case GC_DISPLAY_CLOCK_190_200_MHZ:
4047                         return 190000;
4048                 }
4049         }
4050 }
4051
4052 static int i865_get_display_clock_speed(struct drm_device *dev)
4053 {
4054         return 266000;
4055 }
4056
4057 static int i855_get_display_clock_speed(struct drm_device *dev)
4058 {
4059         u16 hpllcc = 0;
4060         /* Assume that the hardware is in the high speed state.  This
4061          * should be the default.
4062          */
4063         switch (hpllcc & GC_CLOCK_CONTROL_MASK) {
4064         case GC_CLOCK_133_200:
4065         case GC_CLOCK_100_200:
4066                 return 200000;
4067         case GC_CLOCK_166_250:
4068                 return 250000;
4069         case GC_CLOCK_100_133:
4070                 return 133000;
4071         }
4072
4073         /* Shouldn't happen */
4074         return 0;
4075 }
4076
4077 static int i830_get_display_clock_speed(struct drm_device *dev)
4078 {
4079         return 133000;
4080 }
4081
4082 static void
4083 intel_reduce_m_n_ratio(uint32_t *num, uint32_t *den)
4084 {
4085         while (*num > DATA_LINK_M_N_MASK ||
4086                *den > DATA_LINK_M_N_MASK) {
4087                 *num >>= 1;
4088                 *den >>= 1;
4089         }
4090 }
4091
4092 static void compute_m_n(unsigned int m, unsigned int n,
4093                         uint32_t *ret_m, uint32_t *ret_n)
4094 {
4095         *ret_n = min_t(unsigned int, roundup_pow_of_two(n), DATA_LINK_N_MAX);
4096         *ret_m = div_u64((uint64_t) m * *ret_n, n);
4097         intel_reduce_m_n_ratio(ret_m, ret_n);
4098 }
4099
4100 void
4101 intel_link_compute_m_n(int bits_per_pixel, int nlanes,
4102                        int pixel_clock, int link_clock,
4103                        struct intel_link_m_n *m_n)
4104 {
4105         m_n->tu = 64;
4106
4107         compute_m_n(bits_per_pixel * pixel_clock,
4108                     link_clock * nlanes * 8,
4109                     &m_n->gmch_m, &m_n->gmch_n);
4110
4111         compute_m_n(pixel_clock, link_clock,
4112                     &m_n->link_m, &m_n->link_n);
4113 }
4114
4115 static inline bool intel_panel_use_ssc(struct drm_i915_private *dev_priv)
4116 {
4117         if (i915_panel_use_ssc >= 0)
4118                 return i915_panel_use_ssc != 0;
4119         return dev_priv->lvds_use_ssc
4120                 && !(dev_priv->quirks & QUIRK_LVDS_SSC_DISABLE);
4121 }
4122
4123 static int vlv_get_refclk(struct drm_crtc *crtc)
4124 {
4125         struct drm_device *dev = crtc->dev;
4126         struct drm_i915_private *dev_priv = dev->dev_private;
4127         int refclk = 27000; /* for DP & HDMI */
4128
4129         return 100000; /* only one validated so far */
4130
4131         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG)) {
4132                 refclk = 96000;
4133         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
4134                 if (intel_panel_use_ssc(dev_priv))
4135                         refclk = 100000;
4136                 else
4137                         refclk = 96000;
4138         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP)) {
4139                 refclk = 100000;
4140         }
4141
4142         return refclk;
4143 }
4144
4145 static int i9xx_get_refclk(struct drm_crtc *crtc, int num_connectors)
4146 {
4147         struct drm_device *dev = crtc->dev;
4148         struct drm_i915_private *dev_priv = dev->dev_private;
4149         int refclk;
4150
4151         if (IS_VALLEYVIEW(dev)) {
4152                 refclk = vlv_get_refclk(crtc);
4153         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
4154             intel_panel_use_ssc(dev_priv) && num_connectors < 2) {
4155                 refclk = dev_priv->lvds_ssc_freq * 1000;
4156                 DRM_DEBUG_KMS("using SSC reference clock of %d MHz\n",
4157                               refclk / 1000);
4158         } else if (!IS_GEN2(dev)) {
4159                 refclk = 96000;
4160         } else {
4161                 refclk = 48000;
4162         }
4163
4164         return refclk;
4165 }
4166
4167 static void i9xx_adjust_sdvo_tv_clock(struct intel_crtc *crtc)
4168 {
4169         unsigned dotclock = crtc->config.adjusted_mode.clock;
4170         struct dpll *clock = &crtc->config.dpll;
4171
4172         /* SDVO TV has fixed PLL values depend on its clock range,
4173            this mirrors vbios setting. */
4174         if (dotclock >= 100000 && dotclock < 140500) {
4175                 clock->p1 = 2;
4176                 clock->p2 = 10;
4177                 clock->n = 3;
4178                 clock->m1 = 16;
4179                 clock->m2 = 8;
4180         } else if (dotclock >= 140500 && dotclock <= 200000) {
4181                 clock->p1 = 1;
4182                 clock->p2 = 10;
4183                 clock->n = 6;
4184                 clock->m1 = 12;
4185                 clock->m2 = 8;
4186         }
4187
4188         crtc->config.clock_set = true;
4189 }
4190
4191 static void i9xx_update_pll_dividers(struct intel_crtc *crtc,
4192                                      intel_clock_t *reduced_clock)
4193 {
4194         struct drm_device *dev = crtc->base.dev;
4195         struct drm_i915_private *dev_priv = dev->dev_private;
4196         int pipe = crtc->pipe;
4197         u32 fp, fp2 = 0;
4198         struct dpll *clock = &crtc->config.dpll;
4199
4200         if (IS_PINEVIEW(dev)) {
4201                 fp = (1 << clock->n) << 16 | clock->m1 << 8 | clock->m2;
4202                 if (reduced_clock)
4203                         fp2 = (1 << reduced_clock->n) << 16 |
4204                                 reduced_clock->m1 << 8 | reduced_clock->m2;
4205         } else {
4206                 fp = clock->n << 16 | clock->m1 << 8 | clock->m2;
4207                 if (reduced_clock)
4208                         fp2 = reduced_clock->n << 16 | reduced_clock->m1 << 8 |
4209                                 reduced_clock->m2;
4210         }
4211
4212         I915_WRITE(FP0(pipe), fp);
4213
4214         crtc->lowfreq_avail = false;
4215         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS) &&
4216             reduced_clock && i915_powersave) {
4217                 I915_WRITE(FP1(pipe), fp2);
4218                 crtc->lowfreq_avail = true;
4219         } else {
4220                 I915_WRITE(FP1(pipe), fp);
4221         }
4222 }
4223
4224 static void intel_dp_set_m_n(struct intel_crtc *crtc)
4225 {
4226         if (crtc->config.has_pch_encoder)
4227                 intel_pch_transcoder_set_m_n(crtc, &crtc->config.dp_m_n);
4228         else
4229                 intel_cpu_transcoder_set_m_n(crtc, &crtc->config.dp_m_n);
4230 }
4231
4232 static void vlv_update_pll(struct intel_crtc *crtc)
4233 {
4234         struct drm_device *dev = crtc->base.dev;
4235         struct drm_i915_private *dev_priv = dev->dev_private;
4236         int pipe = crtc->pipe;
4237         u32 dpll, mdiv, pdiv;
4238         u32 bestn, bestm1, bestm2, bestp1, bestp2;
4239         bool is_sdvo;
4240         u32 temp;
4241
4242         mutex_lock(&dev_priv->dpio_lock);
4243
4244         is_sdvo = intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_SDVO) ||
4245                 intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_HDMI);
4246
4247         dpll = DPLL_VGA_MODE_DIS;
4248         dpll |= DPLL_EXT_BUFFER_ENABLE_VLV;
4249         dpll |= DPLL_REFA_CLK_ENABLE_VLV;
4250         dpll |= DPLL_INTEGRATED_CLOCK_VLV;
4251
4252         I915_WRITE(DPLL(pipe), dpll);
4253         POSTING_READ(DPLL(pipe));
4254
4255         bestn = crtc->config.dpll.n;
4256         bestm1 = crtc->config.dpll.m1;
4257         bestm2 = crtc->config.dpll.m2;
4258         bestp1 = crtc->config.dpll.p1;
4259         bestp2 = crtc->config.dpll.p2;
4260
4261         /*
4262          * In Valleyview PLL and program lane counter registers are exposed
4263          * through DPIO interface
4264          */
4265         mdiv = ((bestm1 << DPIO_M1DIV_SHIFT) | (bestm2 & DPIO_M2DIV_MASK));
4266         mdiv |= ((bestp1 << DPIO_P1_SHIFT) | (bestp2 << DPIO_P2_SHIFT));
4267         mdiv |= ((bestn << DPIO_N_SHIFT));
4268         mdiv |= (1 << DPIO_POST_DIV_SHIFT);
4269         mdiv |= (1 << DPIO_K_SHIFT);
4270         mdiv |= DPIO_ENABLE_CALIBRATION;
4271         intel_dpio_write(dev_priv, DPIO_DIV(pipe), mdiv);
4272
4273         intel_dpio_write(dev_priv, DPIO_CORE_CLK(pipe), 0x01000000);
4274
4275         pdiv = (1 << DPIO_REFSEL_OVERRIDE) | (5 << DPIO_PLL_MODESEL_SHIFT) |
4276                 (3 << DPIO_BIAS_CURRENT_CTL_SHIFT) | (1<<20) |
4277                 (7 << DPIO_PLL_REFCLK_SEL_SHIFT) | (8 << DPIO_DRIVER_CTL_SHIFT) |
4278                 (5 << DPIO_CLK_BIAS_CTL_SHIFT);
4279         intel_dpio_write(dev_priv, DPIO_REFSFR(pipe), pdiv);
4280
4281         intel_dpio_write(dev_priv, DPIO_LFP_COEFF(pipe), 0x005f003b);
4282
4283         dpll |= DPLL_VCO_ENABLE;
4284         I915_WRITE(DPLL(pipe), dpll);
4285         POSTING_READ(DPLL(pipe));
4286         if (wait_for(((I915_READ(DPLL(pipe)) & DPLL_LOCK_VLV) == DPLL_LOCK_VLV), 1))
4287                 DRM_ERROR("DPLL %d failed to lock\n", pipe);
4288
4289         intel_dpio_write(dev_priv, DPIO_FASTCLK_DISABLE, 0x620);
4290
4291         if (crtc->config.has_dp_encoder)
4292                 intel_dp_set_m_n(crtc);
4293
4294         I915_WRITE(DPLL(pipe), dpll);
4295
4296         /* Wait for the clocks to stabilize. */
4297         POSTING_READ(DPLL(pipe));
4298         udelay(150);
4299
4300         temp = 0;
4301         if (is_sdvo) {
4302                 temp = 0;
4303                 if (crtc->config.pixel_multiplier > 1) {
4304                         temp = (crtc->config.pixel_multiplier - 1)
4305                                 << DPLL_MD_UDI_MULTIPLIER_SHIFT;
4306                 }
4307         }
4308         I915_WRITE(DPLL_MD(pipe), temp);
4309         POSTING_READ(DPLL_MD(pipe));
4310
4311         /* Now program lane control registers */
4312         if(intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_DISPLAYPORT)
4313            || intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_HDMI)) {
4314                 temp = 0x1000C4;
4315                 if(pipe == 1)
4316                         temp |= (1 << 21);
4317                 intel_dpio_write(dev_priv, DPIO_DATA_CHANNEL1, temp);
4318         }
4319
4320         if(intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_EDP)) {
4321                 temp = 0x1000C4;
4322                 if(pipe == 1)
4323                         temp |= (1 << 21);
4324                 intel_dpio_write(dev_priv, DPIO_DATA_CHANNEL2, temp);
4325         }
4326
4327         mutex_unlock(&dev_priv->dpio_lock);
4328 }
4329
4330 static void i9xx_update_pll(struct intel_crtc *crtc,
4331                             intel_clock_t *reduced_clock,
4332                             int num_connectors,
4333                             bool needs_tv_clock)
4334 {
4335         struct drm_device *dev = crtc->base.dev;
4336         struct drm_i915_private *dev_priv = dev->dev_private;
4337         struct intel_encoder *encoder;
4338         int pipe = crtc->pipe;
4339         u32 dpll;
4340         bool is_sdvo;
4341         struct dpll *clock = &crtc->config.dpll;
4342
4343         i9xx_update_pll_dividers(crtc, reduced_clock);
4344
4345         is_sdvo = intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_SDVO) ||
4346                 intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_HDMI);
4347
4348         dpll = DPLL_VGA_MODE_DIS;
4349
4350         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS))
4351                 dpll |= DPLLB_MODE_LVDS;
4352         else
4353                 dpll |= DPLLB_MODE_DAC_SERIAL;
4354
4355         if (is_sdvo) {
4356                 if ((crtc->config.pixel_multiplier > 1) &&
4357                     (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))) {
4358                         dpll |= (crtc->config.pixel_multiplier - 1)
4359                                 << SDVO_MULTIPLIER_SHIFT_HIRES;
4360                 }
4361                 dpll |= DPLL_DVO_HIGH_SPEED;
4362         }
4363         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_DISPLAYPORT))
4364                 dpll |= DPLL_DVO_HIGH_SPEED;
4365
4366         /* compute bitmask from p1 value */
4367         if (IS_PINEVIEW(dev))
4368                 dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW;
4369         else {
4370                 dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4371                 if (IS_G4X(dev) && reduced_clock)
4372                         dpll |= (1 << (reduced_clock->p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
4373         }
4374         switch (clock->p2) {
4375         case 5:
4376                 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
4377                 break;
4378         case 7:
4379                 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
4380                 break;
4381         case 10:
4382                 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
4383                 break;
4384         case 14:
4385                 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
4386                 break;
4387         }
4388         if (INTEL_INFO(dev)->gen >= 4)
4389                 dpll |= (6 << PLL_LOAD_PULSE_PHASE_SHIFT);
4390
4391         if (is_sdvo && needs_tv_clock)
4392                 dpll |= PLL_REF_INPUT_TVCLKINBC;
4393         else if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_TVOUT))
4394                 /* XXX: just matching BIOS for now */
4395                 /*      dpll |= PLL_REF_INPUT_TVCLKINBC; */
4396                 dpll |= 3;
4397         else if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS) &&
4398                  intel_panel_use_ssc(dev_priv) && num_connectors < 2)
4399                 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
4400         else
4401                 dpll |= PLL_REF_INPUT_DREFCLK;
4402
4403         dpll |= DPLL_VCO_ENABLE;
4404         I915_WRITE(DPLL(pipe), dpll & ~DPLL_VCO_ENABLE);
4405         POSTING_READ(DPLL(pipe));
4406         udelay(150);
4407
4408         for_each_encoder_on_crtc(dev, &crtc->base, encoder)
4409                 if (encoder->pre_pll_enable)
4410                         encoder->pre_pll_enable(encoder);
4411
4412         if (crtc->config.has_dp_encoder)
4413                 intel_dp_set_m_n(crtc);
4414
4415         I915_WRITE(DPLL(pipe), dpll);
4416
4417         /* Wait for the clocks to stabilize. */
4418         POSTING_READ(DPLL(pipe));
4419         udelay(150);
4420
4421         if (INTEL_INFO(dev)->gen >= 4) {
4422                 u32 temp = 0;
4423                 if (is_sdvo) {
4424                         temp = 0;
4425                         if (crtc->config.pixel_multiplier > 1) {
4426                                 temp = (crtc->config.pixel_multiplier - 1)
4427                                         << DPLL_MD_UDI_MULTIPLIER_SHIFT;
4428                         }
4429                 }
4430                 I915_WRITE(DPLL_MD(pipe), temp);
4431         } else {
4432                 /* The pixel multiplier can only be updated once the
4433                  * DPLL is enabled and the clocks are stable.
4434                  *
4435                  * So write it again.
4436                  */
4437                 I915_WRITE(DPLL(pipe), dpll);
4438         }
4439 }
4440
4441 static void i8xx_update_pll(struct intel_crtc *crtc,
4442                             struct drm_display_mode *adjusted_mode,
4443                             intel_clock_t *reduced_clock,
4444                             int num_connectors)
4445 {
4446         struct drm_device *dev = crtc->base.dev;
4447         struct drm_i915_private *dev_priv = dev->dev_private;
4448         struct intel_encoder *encoder;
4449         int pipe = crtc->pipe;
4450         u32 dpll;
4451         struct dpll *clock = &crtc->config.dpll;
4452
4453         i9xx_update_pll_dividers(crtc, reduced_clock);
4454
4455         dpll = DPLL_VGA_MODE_DIS;
4456
4457         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS)) {
4458                 dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4459         } else {
4460                 if (clock->p1 == 2)
4461                         dpll |= PLL_P1_DIVIDE_BY_TWO;
4462                 else
4463                         dpll |= (clock->p1 - 2) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4464                 if (clock->p2 == 4)
4465                         dpll |= PLL_P2_DIVIDE_BY_4;
4466         }
4467
4468         if (intel_pipe_has_type(&crtc->base, INTEL_OUTPUT_LVDS) &&
4469                  intel_panel_use_ssc(dev_priv) && num_connectors < 2)
4470                 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
4471         else
4472                 dpll |= PLL_REF_INPUT_DREFCLK;
4473
4474         dpll |= DPLL_VCO_ENABLE;
4475         I915_WRITE(DPLL(pipe), dpll & ~DPLL_VCO_ENABLE);
4476         POSTING_READ(DPLL(pipe));
4477         udelay(150);
4478
4479         for_each_encoder_on_crtc(dev, &crtc->base, encoder)
4480                 if (encoder->pre_pll_enable)
4481                         encoder->pre_pll_enable(encoder);
4482
4483         I915_WRITE(DPLL(pipe), dpll);
4484
4485         /* Wait for the clocks to stabilize. */
4486         POSTING_READ(DPLL(pipe));
4487         udelay(150);
4488
4489         /* The pixel multiplier can only be updated once the
4490          * DPLL is enabled and the clocks are stable.
4491          *
4492          * So write it again.
4493          */
4494         I915_WRITE(DPLL(pipe), dpll);
4495 }
4496
4497 static void intel_set_pipe_timings(struct intel_crtc *intel_crtc,
4498                                    struct drm_display_mode *mode,
4499                                    struct drm_display_mode *adjusted_mode)
4500 {
4501         struct drm_device *dev = intel_crtc->base.dev;
4502         struct drm_i915_private *dev_priv = dev->dev_private;
4503         enum pipe pipe = intel_crtc->pipe;
4504         enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
4505         uint32_t vsyncshift;
4506
4507         if (!IS_GEN2(dev) && adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
4508                 /* the chip adds 2 halflines automatically */
4509                 adjusted_mode->crtc_vtotal -= 1;
4510                 adjusted_mode->crtc_vblank_end -= 1;
4511                 vsyncshift = adjusted_mode->crtc_hsync_start
4512                              - adjusted_mode->crtc_htotal / 2;
4513         } else {
4514                 vsyncshift = 0;
4515         }
4516
4517         if (INTEL_INFO(dev)->gen > 3)
4518                 I915_WRITE(VSYNCSHIFT(cpu_transcoder), vsyncshift);
4519
4520         I915_WRITE(HTOTAL(cpu_transcoder),
4521                    (adjusted_mode->crtc_hdisplay - 1) |
4522                    ((adjusted_mode->crtc_htotal - 1) << 16));
4523         I915_WRITE(HBLANK(cpu_transcoder),
4524                    (adjusted_mode->crtc_hblank_start - 1) |
4525                    ((adjusted_mode->crtc_hblank_end - 1) << 16));
4526         I915_WRITE(HSYNC(cpu_transcoder),
4527                    (adjusted_mode->crtc_hsync_start - 1) |
4528                    ((adjusted_mode->crtc_hsync_end - 1) << 16));
4529
4530         I915_WRITE(VTOTAL(cpu_transcoder),
4531                    (adjusted_mode->crtc_vdisplay - 1) |
4532                    ((adjusted_mode->crtc_vtotal - 1) << 16));
4533         I915_WRITE(VBLANK(cpu_transcoder),
4534                    (adjusted_mode->crtc_vblank_start - 1) |
4535                    ((adjusted_mode->crtc_vblank_end - 1) << 16));
4536         I915_WRITE(VSYNC(cpu_transcoder),
4537                    (adjusted_mode->crtc_vsync_start - 1) |
4538                    ((adjusted_mode->crtc_vsync_end - 1) << 16));
4539
4540         /* Workaround: when the EDP input selection is B, the VTOTAL_B must be
4541          * programmed with the VTOTAL_EDP value. Same for VTOTAL_C. This is
4542          * documented on the DDI_FUNC_CTL register description, EDP Input Select
4543          * bits. */
4544         if (IS_HASWELL(dev) && cpu_transcoder == TRANSCODER_EDP &&
4545             (pipe == PIPE_B || pipe == PIPE_C))
4546                 I915_WRITE(VTOTAL(pipe), I915_READ(VTOTAL(cpu_transcoder)));
4547
4548         /* pipesrc controls the size that is scaled from, which should
4549          * always be the user's requested size.
4550          */
4551         I915_WRITE(PIPESRC(pipe),
4552                    ((mode->hdisplay - 1) << 16) | (mode->vdisplay - 1));
4553 }
4554
4555 static void i9xx_set_pipeconf(struct intel_crtc *intel_crtc)
4556 {
4557         struct drm_device *dev = intel_crtc->base.dev;
4558         struct drm_i915_private *dev_priv = dev->dev_private;
4559         uint32_t pipeconf;
4560
4561         pipeconf = I915_READ(PIPECONF(intel_crtc->pipe));
4562
4563         if (dev_priv->quirks & QUIRK_PIPEA_FORCE &&
4564             I915_READ(PIPECONF(intel_crtc->pipe)) & PIPECONF_ENABLE)
4565                 pipeconf |= PIPECONF_ENABLE;
4566
4567         if (intel_crtc->pipe == 0 && INTEL_INFO(dev)->gen < 4) {
4568                 /* Enable pixel doubling when the dot clock is > 90% of the (display)
4569                  * core speed.
4570                  *
4571                  * XXX: No double-wide on 915GM pipe B. Is that the only reason for the
4572                  * pipe == 0 check?
4573                  */
4574                 if (intel_crtc->config.requested_mode.clock >
4575                     dev_priv->display.get_display_clock_speed(dev) * 9 / 10)
4576                         pipeconf |= PIPECONF_DOUBLE_WIDE;
4577                 else
4578                         pipeconf &= ~PIPECONF_DOUBLE_WIDE;
4579         }
4580
4581         /* default to 8bpc */
4582         pipeconf &= ~(PIPECONF_BPC_MASK | PIPECONF_DITHER_EN);
4583         if (intel_crtc->config.has_dp_encoder) {
4584                 if (intel_crtc->config.dither) {
4585                         pipeconf |= PIPECONF_6BPC |
4586                                     PIPECONF_DITHER_EN |
4587                                     PIPECONF_DITHER_TYPE_SP;
4588                 }
4589         }
4590
4591         if (IS_VALLEYVIEW(dev) && intel_pipe_has_type(&intel_crtc->base,
4592                                                       INTEL_OUTPUT_EDP)) {
4593                 if (intel_crtc->config.dither) {
4594                         pipeconf |= PIPECONF_6BPC |
4595                                         PIPECONF_ENABLE |
4596                                         I965_PIPECONF_ACTIVE;
4597                 }
4598         }
4599
4600         if (HAS_PIPE_CXSR(dev)) {
4601                 if (intel_crtc->lowfreq_avail) {
4602                         DRM_DEBUG_KMS("enabling CxSR downclocking\n");
4603                         pipeconf |= PIPECONF_CXSR_DOWNCLOCK;
4604                 } else {
4605                         DRM_DEBUG_KMS("disabling CxSR downclocking\n");
4606                         pipeconf &= ~PIPECONF_CXSR_DOWNCLOCK;
4607                 }
4608         }
4609
4610         pipeconf &= ~PIPECONF_INTERLACE_MASK;
4611         if (!IS_GEN2(dev) &&
4612             intel_crtc->config.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE)
4613                 pipeconf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
4614         else
4615                 pipeconf |= PIPECONF_PROGRESSIVE;
4616
4617         if (IS_VALLEYVIEW(dev)) {
4618                 if (intel_crtc->config.limited_color_range)
4619                         pipeconf |= PIPECONF_COLOR_RANGE_SELECT;
4620                 else
4621                         pipeconf &= ~PIPECONF_COLOR_RANGE_SELECT;
4622         }
4623
4624         I915_WRITE(PIPECONF(intel_crtc->pipe), pipeconf);
4625         POSTING_READ(PIPECONF(intel_crtc->pipe));
4626 }
4627
4628 static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
4629                               int x, int y,
4630                               struct drm_framebuffer *fb)
4631 {
4632         struct drm_device *dev = crtc->dev;
4633         struct drm_i915_private *dev_priv = dev->dev_private;
4634         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4635         struct drm_display_mode *adjusted_mode =
4636                 &intel_crtc->config.adjusted_mode;
4637         struct drm_display_mode *mode = &intel_crtc->config.requested_mode;
4638         int pipe = intel_crtc->pipe;
4639         int plane = intel_crtc->plane;
4640         int refclk, num_connectors = 0;
4641         intel_clock_t clock, reduced_clock;
4642         u32 dspcntr;
4643         bool ok, has_reduced_clock = false, is_sdvo = false;
4644         bool is_lvds = false, is_tv = false;
4645         struct intel_encoder *encoder;
4646         const intel_limit_t *limit;
4647         int ret;
4648
4649         for_each_encoder_on_crtc(dev, crtc, encoder) {
4650                 switch (encoder->type) {
4651                 case INTEL_OUTPUT_LVDS:
4652                         is_lvds = true;
4653                         break;
4654                 case INTEL_OUTPUT_SDVO:
4655                 case INTEL_OUTPUT_HDMI:
4656                         is_sdvo = true;
4657                         if (encoder->needs_tv_clock)
4658                                 is_tv = true;
4659                         break;
4660                 case INTEL_OUTPUT_TVOUT:
4661                         is_tv = true;
4662                         break;
4663                 }
4664
4665                 num_connectors++;
4666         }
4667
4668         refclk = i9xx_get_refclk(crtc, num_connectors);
4669
4670         /*
4671          * Returns a set of divisors for the desired target clock with the given
4672          * refclk, or FALSE.  The returned values represent the clock equation:
4673          * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
4674          */
4675         limit = intel_limit(crtc, refclk);
4676         ok = limit->find_pll(limit, crtc, adjusted_mode->clock, refclk, NULL,
4677                              &clock);
4678         if (!ok) {
4679                 DRM_ERROR("Couldn't find PLL settings for mode!\n");
4680                 return -EINVAL;
4681         }
4682
4683         /* Ensure that the cursor is valid for the new mode before changing... */
4684         intel_crtc_update_cursor(crtc, true);
4685
4686         if (is_lvds && dev_priv->lvds_downclock_avail) {
4687                 /*
4688                  * Ensure we match the reduced clock's P to the target clock.
4689                  * If the clocks don't match, we can't switch the display clock
4690                  * by using the FP0/FP1. In such case we will disable the LVDS
4691                  * downclock feature.
4692                 */
4693                 has_reduced_clock = limit->find_pll(limit, crtc,
4694                                                     dev_priv->lvds_downclock,
4695                                                     refclk,
4696                                                     &clock,
4697                                                     &reduced_clock);
4698         }
4699         /* Compat-code for transition, will disappear. */
4700         if (!intel_crtc->config.clock_set) {
4701                 intel_crtc->config.dpll.n = clock.n;
4702                 intel_crtc->config.dpll.m1 = clock.m1;
4703                 intel_crtc->config.dpll.m2 = clock.m2;
4704                 intel_crtc->config.dpll.p1 = clock.p1;
4705                 intel_crtc->config.dpll.p2 = clock.p2;
4706         }
4707
4708         if (is_sdvo && is_tv)
4709                 i9xx_adjust_sdvo_tv_clock(intel_crtc);
4710
4711         if (IS_GEN2(dev))
4712                 i8xx_update_pll(intel_crtc, adjusted_mode,
4713                                 has_reduced_clock ? &reduced_clock : NULL,
4714                                 num_connectors);
4715         else if (IS_VALLEYVIEW(dev))
4716                 vlv_update_pll(intel_crtc);
4717         else
4718                 i9xx_update_pll(intel_crtc,
4719                                 has_reduced_clock ? &reduced_clock : NULL,
4720                                 num_connectors,
4721                                 is_sdvo && is_tv);
4722
4723         /* Set up the display plane register */
4724         dspcntr = DISPPLANE_GAMMA_ENABLE;
4725
4726         if (!IS_VALLEYVIEW(dev)) {
4727                 if (pipe == 0)
4728                         dspcntr &= ~DISPPLANE_SEL_PIPE_MASK;
4729                 else
4730                         dspcntr |= DISPPLANE_SEL_PIPE_B;
4731         }
4732
4733         DRM_DEBUG_KMS("Mode for pipe %c:\n", pipe == 0 ? 'A' : 'B');
4734         drm_mode_debug_printmodeline(mode);
4735
4736         intel_set_pipe_timings(intel_crtc, mode, adjusted_mode);
4737
4738         /* pipesrc and dspsize control the size that is scaled from,
4739          * which should always be the user's requested size.
4740          */
4741         I915_WRITE(DSPSIZE(plane),
4742                    ((mode->vdisplay - 1) << 16) |
4743                    (mode->hdisplay - 1));
4744         I915_WRITE(DSPPOS(plane), 0);
4745
4746         i9xx_set_pipeconf(intel_crtc);
4747
4748         intel_enable_pipe(dev_priv, pipe, false);
4749
4750         intel_wait_for_vblank(dev, pipe);
4751
4752         I915_WRITE(DSPCNTR(plane), dspcntr);
4753         POSTING_READ(DSPCNTR(plane));
4754
4755         ret = intel_pipe_set_base(crtc, x, y, fb);
4756
4757         intel_update_watermarks(dev);
4758
4759         return ret;
4760 }
4761
4762 static bool i9xx_get_pipe_config(struct intel_crtc *crtc,
4763                                  struct intel_crtc_config *pipe_config)
4764 {
4765         struct drm_device *dev = crtc->base.dev;
4766         struct drm_i915_private *dev_priv = dev->dev_private;
4767         uint32_t tmp;
4768
4769         tmp = I915_READ(PIPECONF(crtc->pipe));
4770         if (!(tmp & PIPECONF_ENABLE))
4771                 return false;
4772
4773         return true;
4774 }
4775
4776 static void ironlake_init_pch_refclk(struct drm_device *dev)
4777 {
4778         struct drm_i915_private *dev_priv = dev->dev_private;
4779         struct drm_mode_config *mode_config = &dev->mode_config;
4780         struct intel_encoder *encoder;
4781         u32 val, final;
4782         bool has_lvds = false;
4783         bool has_cpu_edp = false;
4784         bool has_pch_edp = false;
4785         bool has_panel = false;
4786         bool has_ck505 = false;
4787         bool can_ssc = false;
4788
4789         /* We need to take the global config into account */
4790         list_for_each_entry(encoder, &mode_config->encoder_list,
4791                             base.head) {
4792                 switch (encoder->type) {
4793                 case INTEL_OUTPUT_LVDS:
4794                         has_panel = true;
4795                         has_lvds = true;
4796                         break;
4797                 case INTEL_OUTPUT_EDP:
4798                         has_panel = true;
4799                         if (intel_encoder_is_pch_edp(&encoder->base))
4800                                 has_pch_edp = true;
4801                         else
4802                                 has_cpu_edp = true;
4803                         break;
4804                 }
4805         }
4806
4807         if (HAS_PCH_IBX(dev)) {
4808                 has_ck505 = dev_priv->display_clock_mode;
4809                 can_ssc = has_ck505;
4810         } else {
4811                 has_ck505 = false;
4812                 can_ssc = true;
4813         }
4814
4815         DRM_DEBUG_KMS("has_panel %d has_lvds %d has_pch_edp %d has_cpu_edp %d has_ck505 %d\n",
4816                       has_panel, has_lvds, has_pch_edp, has_cpu_edp,
4817                       has_ck505);
4818
4819         /* Ironlake: try to setup display ref clock before DPLL
4820          * enabling. This is only under driver's control after
4821          * PCH B stepping, previous chipset stepping should be
4822          * ignoring this setting.
4823          */
4824         val = I915_READ(PCH_DREF_CONTROL);
4825
4826         /* As we must carefully and slowly disable/enable each source in turn,
4827          * compute the final state we want first and check if we need to
4828          * make any changes at all.
4829          */
4830         final = val;
4831         final &= ~DREF_NONSPREAD_SOURCE_MASK;
4832         if (has_ck505)
4833                 final |= DREF_NONSPREAD_CK505_ENABLE;
4834         else
4835                 final |= DREF_NONSPREAD_SOURCE_ENABLE;
4836
4837         final &= ~DREF_SSC_SOURCE_MASK;
4838         final &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
4839         final &= ~DREF_SSC1_ENABLE;
4840
4841         if (has_panel) {
4842                 final |= DREF_SSC_SOURCE_ENABLE;
4843
4844                 if (intel_panel_use_ssc(dev_priv) && can_ssc)
4845                         final |= DREF_SSC1_ENABLE;
4846
4847                 if (has_cpu_edp) {
4848                         if (intel_panel_use_ssc(dev_priv) && can_ssc)
4849                                 final |= DREF_CPU_SOURCE_OUTPUT_DOWNSPREAD;
4850                         else
4851                                 final |= DREF_CPU_SOURCE_OUTPUT_NONSPREAD;
4852                 } else
4853                         final |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
4854         } else {
4855                 final |= DREF_SSC_SOURCE_DISABLE;
4856                 final |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
4857         }
4858
4859         if (final == val)
4860                 return;
4861
4862         /* Always enable nonspread source */
4863         val &= ~DREF_NONSPREAD_SOURCE_MASK;
4864
4865         if (has_ck505)
4866                 val |= DREF_NONSPREAD_CK505_ENABLE;
4867         else
4868                 val |= DREF_NONSPREAD_SOURCE_ENABLE;
4869
4870         if (has_panel) {
4871                 val &= ~DREF_SSC_SOURCE_MASK;
4872                 val |= DREF_SSC_SOURCE_ENABLE;
4873
4874                 /* SSC must be turned on before enabling the CPU output  */
4875                 if (intel_panel_use_ssc(dev_priv) && can_ssc) {
4876                         DRM_DEBUG_KMS("Using SSC on panel\n");
4877                         val |= DREF_SSC1_ENABLE;
4878                 } else
4879                         val &= ~DREF_SSC1_ENABLE;
4880
4881                 /* Get SSC going before enabling the outputs */
4882                 I915_WRITE(PCH_DREF_CONTROL, val);
4883                 POSTING_READ(PCH_DREF_CONTROL);
4884                 udelay(200);
4885
4886                 val &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
4887
4888                 /* Enable CPU source on CPU attached eDP */
4889                 if (has_cpu_edp) {
4890                         if (intel_panel_use_ssc(dev_priv) && can_ssc) {
4891                                 DRM_DEBUG_KMS("Using SSC on eDP\n");
4892                                 val |= DREF_CPU_SOURCE_OUTPUT_DOWNSPREAD;
4893                         }
4894                         else
4895                                 val |= DREF_CPU_SOURCE_OUTPUT_NONSPREAD;
4896                 } else
4897                         val |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
4898
4899                 I915_WRITE(PCH_DREF_CONTROL, val);
4900                 POSTING_READ(PCH_DREF_CONTROL);
4901                 udelay(200);
4902         } else {
4903                 DRM_DEBUG_KMS("Disabling SSC entirely\n");
4904
4905                 val &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
4906
4907                 /* Turn off CPU output */
4908                 val |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
4909
4910                 I915_WRITE(PCH_DREF_CONTROL, val);
4911                 POSTING_READ(PCH_DREF_CONTROL);
4912                 udelay(200);
4913
4914                 /* Turn off the SSC source */
4915                 val &= ~DREF_SSC_SOURCE_MASK;
4916                 val |= DREF_SSC_SOURCE_DISABLE;
4917
4918                 /* Turn off SSC1 */
4919                 val &= ~DREF_SSC1_ENABLE;
4920
4921                 I915_WRITE(PCH_DREF_CONTROL, val);
4922                 POSTING_READ(PCH_DREF_CONTROL);
4923                 udelay(200);
4924         }
4925
4926         BUG_ON(val != final);
4927 }
4928
4929 /* Sequence to enable CLKOUT_DP for FDI usage and configure PCH FDI I/O. */
4930 static void lpt_init_pch_refclk(struct drm_device *dev)
4931 {
4932         struct drm_i915_private *dev_priv = dev->dev_private;
4933         struct drm_mode_config *mode_config = &dev->mode_config;
4934         struct intel_encoder *encoder;
4935         bool has_vga = false;
4936         bool is_sdv = false;
4937         u32 tmp;
4938
4939         list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
4940                 switch (encoder->type) {
4941                 case INTEL_OUTPUT_ANALOG:
4942                         has_vga = true;
4943                         break;
4944                 }
4945         }
4946
4947         if (!has_vga)
4948                 return;
4949
4950         mutex_lock(&dev_priv->dpio_lock);
4951
4952         /* XXX: Rip out SDV support once Haswell ships for real. */
4953         if (IS_HASWELL(dev) && (dev->pci_device & 0xFF00) == 0x0C00)
4954                 is_sdv = true;
4955
4956         tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
4957         tmp &= ~SBI_SSCCTL_DISABLE;
4958         tmp |= SBI_SSCCTL_PATHALT;
4959         intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
4960
4961         udelay(24);
4962
4963         tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
4964         tmp &= ~SBI_SSCCTL_PATHALT;
4965         intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
4966
4967         if (!is_sdv) {
4968                 tmp = I915_READ(SOUTH_CHICKEN2);
4969                 tmp |= FDI_MPHY_IOSFSB_RESET_CTL;
4970                 I915_WRITE(SOUTH_CHICKEN2, tmp);
4971
4972                 if (wait_for_atomic_us(I915_READ(SOUTH_CHICKEN2) &
4973                                        FDI_MPHY_IOSFSB_RESET_STATUS, 100))
4974                         DRM_ERROR("FDI mPHY reset assert timeout\n");
4975
4976                 tmp = I915_READ(SOUTH_CHICKEN2);
4977                 tmp &= ~FDI_MPHY_IOSFSB_RESET_CTL;
4978                 I915_WRITE(SOUTH_CHICKEN2, tmp);
4979
4980                 if (wait_for_atomic_us((I915_READ(SOUTH_CHICKEN2) &
4981                                         FDI_MPHY_IOSFSB_RESET_STATUS) == 0,
4982                                        100))
4983                         DRM_ERROR("FDI mPHY reset de-assert timeout\n");
4984         }
4985
4986         tmp = intel_sbi_read(dev_priv, 0x8008, SBI_MPHY);
4987         tmp &= ~(0xFF << 24);
4988         tmp |= (0x12 << 24);
4989         intel_sbi_write(dev_priv, 0x8008, tmp, SBI_MPHY);
4990
4991         if (is_sdv) {
4992                 tmp = intel_sbi_read(dev_priv, 0x800C, SBI_MPHY);
4993                 tmp |= 0x7FFF;
4994                 intel_sbi_write(dev_priv, 0x800C, tmp, SBI_MPHY);
4995         }
4996
4997         tmp = intel_sbi_read(dev_priv, 0x2008, SBI_MPHY);
4998         tmp |= (1 << 11);
4999         intel_sbi_write(dev_priv, 0x2008, tmp, SBI_MPHY);
5000
5001         tmp = intel_sbi_read(dev_priv, 0x2108, SBI_MPHY);
5002         tmp |= (1 << 11);
5003         intel_sbi_write(dev_priv, 0x2108, tmp, SBI_MPHY);
5004
5005         if (is_sdv) {
5006                 tmp = intel_sbi_read(dev_priv, 0x2038, SBI_MPHY);
5007                 tmp |= (0x3F << 24) | (0xF << 20) | (0xF << 16);
5008                 intel_sbi_write(dev_priv, 0x2038, tmp, SBI_MPHY);
5009
5010                 tmp = intel_sbi_read(dev_priv, 0x2138, SBI_MPHY);
5011                 tmp |= (0x3F << 24) | (0xF << 20) | (0xF << 16);
5012                 intel_sbi_write(dev_priv, 0x2138, tmp, SBI_MPHY);
5013
5014                 tmp = intel_sbi_read(dev_priv, 0x203C, SBI_MPHY);
5015                 tmp |= (0x3F << 8);
5016                 intel_sbi_write(dev_priv, 0x203C, tmp, SBI_MPHY);
5017
5018                 tmp = intel_sbi_read(dev_priv, 0x213C, SBI_MPHY);
5019                 tmp |= (0x3F << 8);
5020                 intel_sbi_write(dev_priv, 0x213C, tmp, SBI_MPHY);
5021         }
5022
5023         tmp = intel_sbi_read(dev_priv, 0x206C, SBI_MPHY);
5024         tmp |= (1 << 24) | (1 << 21) | (1 << 18);
5025         intel_sbi_write(dev_priv, 0x206C, tmp, SBI_MPHY);
5026
5027         tmp = intel_sbi_read(dev_priv, 0x216C, SBI_MPHY);
5028         tmp |= (1 << 24) | (1 << 21) | (1 << 18);
5029         intel_sbi_write(dev_priv, 0x216C, tmp, SBI_MPHY);
5030
5031         if (!is_sdv) {
5032                 tmp = intel_sbi_read(dev_priv, 0x2080, SBI_MPHY);
5033                 tmp &= ~(7 << 13);
5034                 tmp |= (5 << 13);
5035                 intel_sbi_write(dev_priv, 0x2080, tmp, SBI_MPHY);
5036
5037                 tmp = intel_sbi_read(dev_priv, 0x2180, SBI_MPHY);
5038                 tmp &= ~(7 << 13);
5039                 tmp |= (5 << 13);
5040                 intel_sbi_write(dev_priv, 0x2180, tmp, SBI_MPHY);
5041         }
5042
5043         tmp = intel_sbi_read(dev_priv, 0x208C, SBI_MPHY);
5044         tmp &= ~0xFF;
5045         tmp |= 0x1C;
5046         intel_sbi_write(dev_priv, 0x208C, tmp, SBI_MPHY);
5047
5048         tmp = intel_sbi_read(dev_priv, 0x218C, SBI_MPHY);
5049         tmp &= ~0xFF;
5050         tmp |= 0x1C;
5051         intel_sbi_write(dev_priv, 0x218C, tmp, SBI_MPHY);
5052
5053         tmp = intel_sbi_read(dev_priv, 0x2098, SBI_MPHY);
5054         tmp &= ~(0xFF << 16);
5055         tmp |= (0x1C << 16);
5056         intel_sbi_write(dev_priv, 0x2098, tmp, SBI_MPHY);
5057
5058         tmp = intel_sbi_read(dev_priv, 0x2198, SBI_MPHY);
5059         tmp &= ~(0xFF << 16);
5060         tmp |= (0x1C << 16);
5061         intel_sbi_write(dev_priv, 0x2198, tmp, SBI_MPHY);
5062
5063         if (!is_sdv) {
5064                 tmp = intel_sbi_read(dev_priv, 0x20C4, SBI_MPHY);
5065                 tmp |= (1 << 27);
5066                 intel_sbi_write(dev_priv, 0x20C4, tmp, SBI_MPHY);
5067
5068                 tmp = intel_sbi_read(dev_priv, 0x21C4, SBI_MPHY);
5069                 tmp |= (1 << 27);
5070                 intel_sbi_write(dev_priv, 0x21C4, tmp, SBI_MPHY);
5071
5072                 tmp = intel_sbi_read(dev_priv, 0x20EC, SBI_MPHY);
5073                 tmp &= ~(0xF << 28);
5074                 tmp |= (4 << 28);
5075                 intel_sbi_write(dev_priv, 0x20EC, tmp, SBI_MPHY);
5076
5077                 tmp = intel_sbi_read(dev_priv, 0x21EC, SBI_MPHY);
5078                 tmp &= ~(0xF << 28);
5079                 tmp |= (4 << 28);
5080                 intel_sbi_write(dev_priv, 0x21EC, tmp, SBI_MPHY);
5081         }
5082
5083         /* ULT uses SBI_GEN0, but ULT doesn't have VGA, so we don't care. */
5084         tmp = intel_sbi_read(dev_priv, SBI_DBUFF0, SBI_ICLK);
5085         tmp |= SBI_DBUFF0_ENABLE;
5086         intel_sbi_write(dev_priv, SBI_DBUFF0, tmp, SBI_ICLK);
5087
5088         mutex_unlock(&dev_priv->dpio_lock);
5089 }
5090
5091 /*
5092  * Initialize reference clocks when the driver loads
5093  */
5094 void intel_init_pch_refclk(struct drm_device *dev)
5095 {
5096         if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
5097                 ironlake_init_pch_refclk(dev);
5098         else if (HAS_PCH_LPT(dev))
5099                 lpt_init_pch_refclk(dev);
5100 }
5101
5102 static int ironlake_get_refclk(struct drm_crtc *crtc)
5103 {
5104         struct drm_device *dev = crtc->dev;
5105         struct drm_i915_private *dev_priv = dev->dev_private;
5106         struct intel_encoder *encoder;
5107         struct intel_encoder *edp_encoder = NULL;
5108         int num_connectors = 0;
5109         bool is_lvds = false;
5110
5111         for_each_encoder_on_crtc(dev, crtc, encoder) {
5112                 switch (encoder->type) {
5113                 case INTEL_OUTPUT_LVDS:
5114                         is_lvds = true;
5115                         break;
5116                 case INTEL_OUTPUT_EDP:
5117                         edp_encoder = encoder;
5118                         break;
5119                 }
5120                 num_connectors++;
5121         }
5122
5123         if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2) {
5124                 DRM_DEBUG_KMS("using SSC reference clock of %d MHz\n",
5125                               dev_priv->lvds_ssc_freq);
5126                 return dev_priv->lvds_ssc_freq * 1000;
5127         }
5128
5129         return 120000;
5130 }
5131
5132 static void ironlake_set_pipeconf(struct drm_crtc *crtc,
5133                                   struct drm_display_mode *adjusted_mode,
5134                                   bool dither)
5135 {
5136         struct drm_i915_private *dev_priv = crtc->dev->dev_private;
5137         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5138         int pipe = intel_crtc->pipe;
5139         uint32_t val;
5140
5141         val = I915_READ(PIPECONF(pipe));
5142
5143         val &= ~PIPECONF_BPC_MASK;
5144         switch (intel_crtc->config.pipe_bpp) {
5145         case 18:
5146                 val |= PIPECONF_6BPC;
5147                 break;
5148         case 24:
5149                 val |= PIPECONF_8BPC;
5150                 break;
5151         case 30:
5152                 val |= PIPECONF_10BPC;
5153                 break;
5154         case 36:
5155                 val |= PIPECONF_12BPC;
5156                 break;
5157         default:
5158                 /* Case prevented by intel_choose_pipe_bpp_dither. */
5159                 BUG();
5160         }
5161
5162         val &= ~(PIPECONF_DITHER_EN | PIPECONF_DITHER_TYPE_MASK);
5163         if (dither)
5164                 val |= (PIPECONF_DITHER_EN | PIPECONF_DITHER_TYPE_SP);
5165
5166         val &= ~PIPECONF_INTERLACE_MASK;
5167         if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
5168                 val |= PIPECONF_INTERLACED_ILK;
5169         else
5170                 val |= PIPECONF_PROGRESSIVE;
5171
5172         if (intel_crtc->config.limited_color_range)
5173                 val |= PIPECONF_COLOR_RANGE_SELECT;
5174         else
5175                 val &= ~PIPECONF_COLOR_RANGE_SELECT;
5176
5177         I915_WRITE(PIPECONF(pipe), val);
5178         POSTING_READ(PIPECONF(pipe));
5179 }
5180
5181 /*
5182  * Set up the pipe CSC unit.
5183  *
5184  * Currently only full range RGB to limited range RGB conversion
5185  * is supported, but eventually this should handle various
5186  * RGB<->YCbCr scenarios as well.
5187  */
5188 static void intel_set_pipe_csc(struct drm_crtc *crtc)
5189 {
5190         struct drm_device *dev = crtc->dev;
5191         struct drm_i915_private *dev_priv = dev->dev_private;
5192         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5193         int pipe = intel_crtc->pipe;
5194         uint16_t coeff = 0x7800; /* 1.0 */
5195
5196         /*
5197          * TODO: Check what kind of values actually come out of the pipe
5198          * with these coeff/postoff values and adjust to get the best
5199          * accuracy. Perhaps we even need to take the bpc value into
5200          * consideration.
5201          */
5202
5203         if (intel_crtc->config.limited_color_range)
5204                 coeff = ((235 - 16) * (1 << 12) / 255) & 0xff8; /* 0.xxx... */
5205
5206         /*
5207          * GY/GU and RY/RU should be the other way around according
5208          * to BSpec, but reality doesn't agree. Just set them up in
5209          * a way that results in the correct picture.
5210          */
5211         I915_WRITE(PIPE_CSC_COEFF_RY_GY(pipe), coeff << 16);
5212         I915_WRITE(PIPE_CSC_COEFF_BY(pipe), 0);
5213
5214         I915_WRITE(PIPE_CSC_COEFF_RU_GU(pipe), coeff);
5215         I915_WRITE(PIPE_CSC_COEFF_BU(pipe), 0);
5216
5217         I915_WRITE(PIPE_CSC_COEFF_RV_GV(pipe), 0);
5218         I915_WRITE(PIPE_CSC_COEFF_BV(pipe), coeff << 16);
5219
5220         I915_WRITE(PIPE_CSC_PREOFF_HI(pipe), 0);
5221         I915_WRITE(PIPE_CSC_PREOFF_ME(pipe), 0);
5222         I915_WRITE(PIPE_CSC_PREOFF_LO(pipe), 0);
5223
5224         if (INTEL_INFO(dev)->gen > 6) {
5225                 uint16_t postoff = 0;
5226
5227                 if (intel_crtc->config.limited_color_range)
5228                         postoff = (16 * (1 << 12) / 255) & 0x1fff;
5229
5230                 I915_WRITE(PIPE_CSC_POSTOFF_HI(pipe), postoff);
5231                 I915_WRITE(PIPE_CSC_POSTOFF_ME(pipe), postoff);
5232                 I915_WRITE(PIPE_CSC_POSTOFF_LO(pipe), postoff);
5233
5234                 I915_WRITE(PIPE_CSC_MODE(pipe), 0);
5235         } else {
5236                 uint32_t mode = CSC_MODE_YUV_TO_RGB;
5237
5238                 if (intel_crtc->config.limited_color_range)
5239                         mode |= CSC_BLACK_SCREEN_OFFSET;
5240
5241                 I915_WRITE(PIPE_CSC_MODE(pipe), mode);
5242         }
5243 }
5244
5245 static void haswell_set_pipeconf(struct drm_crtc *crtc,
5246                                  struct drm_display_mode *adjusted_mode,
5247                                  bool dither)
5248 {
5249         struct drm_i915_private *dev_priv = crtc->dev->dev_private;
5250         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5251         enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
5252         uint32_t val;
5253
5254         val = I915_READ(PIPECONF(cpu_transcoder));
5255
5256         val &= ~(PIPECONF_DITHER_EN | PIPECONF_DITHER_TYPE_MASK);
5257         if (dither)
5258                 val |= (PIPECONF_DITHER_EN | PIPECONF_DITHER_TYPE_SP);
5259
5260         val &= ~PIPECONF_INTERLACE_MASK_HSW;
5261         if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
5262                 val |= PIPECONF_INTERLACED_ILK;
5263         else
5264                 val |= PIPECONF_PROGRESSIVE;
5265
5266         I915_WRITE(PIPECONF(cpu_transcoder), val);
5267         POSTING_READ(PIPECONF(cpu_transcoder));
5268 }
5269
5270 static bool ironlake_compute_clocks(struct drm_crtc *crtc,
5271                                     struct drm_display_mode *adjusted_mode,
5272                                     intel_clock_t *clock,
5273                                     bool *has_reduced_clock,
5274                                     intel_clock_t *reduced_clock)
5275 {
5276         struct drm_device *dev = crtc->dev;
5277         struct drm_i915_private *dev_priv = dev->dev_private;
5278         struct intel_encoder *intel_encoder;
5279         int refclk;
5280         const intel_limit_t *limit;
5281         bool ret, is_sdvo = false, is_tv = false, is_lvds = false;
5282
5283         for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
5284                 switch (intel_encoder->type) {
5285                 case INTEL_OUTPUT_LVDS:
5286                         is_lvds = true;
5287                         break;
5288                 case INTEL_OUTPUT_SDVO:
5289                 case INTEL_OUTPUT_HDMI:
5290                         is_sdvo = true;
5291                         if (intel_encoder->needs_tv_clock)
5292                                 is_tv = true;
5293                         break;
5294                 case INTEL_OUTPUT_TVOUT:
5295                         is_tv = true;
5296                         break;
5297                 }
5298         }
5299
5300         refclk = ironlake_get_refclk(crtc);
5301
5302         /*
5303          * Returns a set of divisors for the desired target clock with the given
5304          * refclk, or FALSE.  The returned values represent the clock equation:
5305          * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
5306          */
5307         limit = intel_limit(crtc, refclk);
5308         ret = limit->find_pll(limit, crtc, adjusted_mode->clock, refclk, NULL,
5309                               clock);
5310         if (!ret)
5311                 return false;
5312
5313         if (is_lvds && dev_priv->lvds_downclock_avail) {
5314                 /*
5315                  * Ensure we match the reduced clock's P to the target clock.
5316                  * If the clocks don't match, we can't switch the display clock
5317                  * by using the FP0/FP1. In such case we will disable the LVDS
5318                  * downclock feature.
5319                 */
5320                 *has_reduced_clock = limit->find_pll(limit, crtc,
5321                                                      dev_priv->lvds_downclock,
5322                                                      refclk,
5323                                                      clock,
5324                                                      reduced_clock);
5325         }
5326
5327         if (is_sdvo && is_tv)
5328                 i9xx_adjust_sdvo_tv_clock(to_intel_crtc(crtc));
5329
5330         return true;
5331 }
5332
5333 static void cpt_enable_fdi_bc_bifurcation(struct drm_device *dev)
5334 {
5335         struct drm_i915_private *dev_priv = dev->dev_private;
5336         uint32_t temp;
5337
5338         temp = I915_READ(SOUTH_CHICKEN1);
5339         if (temp & FDI_BC_BIFURCATION_SELECT)
5340                 return;
5341
5342         WARN_ON(I915_READ(FDI_RX_CTL(PIPE_B)) & FDI_RX_ENABLE);
5343         WARN_ON(I915_READ(FDI_RX_CTL(PIPE_C)) & FDI_RX_ENABLE);
5344
5345         temp |= FDI_BC_BIFURCATION_SELECT;
5346         DRM_DEBUG_KMS("enabling fdi C rx\n");
5347         I915_WRITE(SOUTH_CHICKEN1, temp);
5348         POSTING_READ(SOUTH_CHICKEN1);
5349 }
5350
5351 static bool ironlake_check_fdi_lanes(struct intel_crtc *intel_crtc)
5352 {
5353         struct drm_device *dev = intel_crtc->base.dev;
5354         struct drm_i915_private *dev_priv = dev->dev_private;
5355         struct intel_crtc *pipe_B_crtc =
5356                 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[PIPE_B]);
5357
5358         DRM_DEBUG_KMS("checking fdi config on pipe %i, lanes %i\n",
5359                       intel_crtc->pipe, intel_crtc->fdi_lanes);
5360         if (intel_crtc->fdi_lanes > 4) {
5361                 DRM_DEBUG_KMS("invalid fdi lane config on pipe %i: %i lanes\n",
5362                               intel_crtc->pipe, intel_crtc->fdi_lanes);
5363                 /* Clamp lanes to avoid programming the hw with bogus values. */
5364                 intel_crtc->fdi_lanes = 4;
5365
5366                 return false;
5367         }
5368
5369         if (INTEL_INFO(dev)->num_pipes == 2)
5370                 return true;
5371
5372         switch (intel_crtc->pipe) {
5373         case PIPE_A:
5374                 return true;
5375         case PIPE_B:
5376                 if (dev_priv->pipe_to_crtc_mapping[PIPE_C]->enabled &&
5377                     intel_crtc->fdi_lanes > 2) {
5378                         DRM_DEBUG_KMS("invalid shared fdi lane config on pipe %i: %i lanes\n",
5379                                       intel_crtc->pipe, intel_crtc->fdi_lanes);
5380                         /* Clamp lanes to avoid programming the hw with bogus values. */
5381                         intel_crtc->fdi_lanes = 2;
5382
5383                         return false;
5384                 }
5385
5386                 if (intel_crtc->fdi_lanes > 2)
5387                         WARN_ON(I915_READ(SOUTH_CHICKEN1) & FDI_BC_BIFURCATION_SELECT);
5388                 else
5389                         cpt_enable_fdi_bc_bifurcation(dev);
5390
5391                 return true;
5392         case PIPE_C:
5393                 if (!pipe_B_crtc->base.enabled || pipe_B_crtc->fdi_lanes <= 2) {
5394                         if (intel_crtc->fdi_lanes > 2) {
5395                                 DRM_DEBUG_KMS("invalid shared fdi lane config on pipe %i: %i lanes\n",
5396                                               intel_crtc->pipe, intel_crtc->fdi_lanes);
5397                                 /* Clamp lanes to avoid programming the hw with bogus values. */
5398                                 intel_crtc->fdi_lanes = 2;
5399
5400                                 return false;
5401                         }
5402                 } else {
5403                         DRM_DEBUG_KMS("fdi link B uses too many lanes to enable link C\n");
5404                         return false;
5405                 }
5406
5407                 cpt_enable_fdi_bc_bifurcation(dev);
5408
5409                 return true;
5410         default:
5411                 BUG();
5412         }
5413 }
5414
5415 int ironlake_get_lanes_required(int target_clock, int link_bw, int bpp)
5416 {
5417         /*
5418          * Account for spread spectrum to avoid
5419          * oversubscribing the link. Max center spread
5420          * is 2.5%; use 5% for safety's sake.
5421          */
5422         u32 bps = target_clock * bpp * 21 / 20;
5423         return bps / (link_bw * 8) + 1;
5424 }
5425
5426 void intel_pch_transcoder_set_m_n(struct intel_crtc *crtc,
5427                                   struct intel_link_m_n *m_n)
5428 {
5429         struct drm_device *dev = crtc->base.dev;
5430         struct drm_i915_private *dev_priv = dev->dev_private;
5431         int pipe = crtc->pipe;
5432
5433         I915_WRITE(TRANSDATA_M1(pipe), TU_SIZE(m_n->tu) | m_n->gmch_m);
5434         I915_WRITE(TRANSDATA_N1(pipe), m_n->gmch_n);
5435         I915_WRITE(TRANSDPLINK_M1(pipe), m_n->link_m);
5436         I915_WRITE(TRANSDPLINK_N1(pipe), m_n->link_n);
5437 }
5438
5439 void intel_cpu_transcoder_set_m_n(struct intel_crtc *crtc,
5440                                   struct intel_link_m_n *m_n)
5441 {
5442         struct drm_device *dev = crtc->base.dev;
5443         struct drm_i915_private *dev_priv = dev->dev_private;
5444         int pipe = crtc->pipe;
5445         enum transcoder transcoder = crtc->config.cpu_transcoder;
5446
5447         if (INTEL_INFO(dev)->gen >= 5) {
5448                 I915_WRITE(PIPE_DATA_M1(transcoder), TU_SIZE(m_n->tu) | m_n->gmch_m);
5449                 I915_WRITE(PIPE_DATA_N1(transcoder), m_n->gmch_n);
5450                 I915_WRITE(PIPE_LINK_M1(transcoder), m_n->link_m);
5451                 I915_WRITE(PIPE_LINK_N1(transcoder), m_n->link_n);
5452         } else {
5453                 I915_WRITE(PIPE_GMCH_DATA_M(pipe), TU_SIZE(m_n->tu) | m_n->gmch_m);
5454                 I915_WRITE(PIPE_GMCH_DATA_N(pipe), m_n->gmch_n);
5455                 I915_WRITE(PIPE_DP_LINK_M(pipe), m_n->link_m);
5456                 I915_WRITE(PIPE_DP_LINK_N(pipe), m_n->link_n);
5457         }
5458 }
5459
5460 static void ironlake_fdi_set_m_n(struct drm_crtc *crtc)
5461 {
5462         struct drm_device *dev = crtc->dev;
5463         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5464         struct drm_display_mode *adjusted_mode =
5465                 &intel_crtc->config.adjusted_mode;
5466         struct intel_link_m_n m_n = {0};
5467         int target_clock, lane, link_bw;
5468
5469         /* FDI is a binary signal running at ~2.7GHz, encoding
5470          * each output octet as 10 bits. The actual frequency
5471          * is stored as a divider into a 100MHz clock, and the
5472          * mode pixel clock is stored in units of 1KHz.
5473          * Hence the bw of each lane in terms of the mode signal
5474          * is:
5475          */
5476         link_bw = intel_fdi_link_freq(dev) * MHz(100)/KHz(1)/10;
5477
5478         if (intel_crtc->config.pixel_target_clock)
5479                 target_clock = intel_crtc->config.pixel_target_clock;
5480         else
5481                 target_clock = adjusted_mode->clock;
5482
5483         lane = ironlake_get_lanes_required(target_clock, link_bw,
5484                                            intel_crtc->config.pipe_bpp);
5485
5486         intel_crtc->fdi_lanes = lane;
5487
5488         if (intel_crtc->config.pixel_multiplier > 1)
5489                 link_bw *= intel_crtc->config.pixel_multiplier;
5490         intel_link_compute_m_n(intel_crtc->config.pipe_bpp, lane, target_clock,
5491                                link_bw, &m_n);
5492
5493         intel_cpu_transcoder_set_m_n(intel_crtc, &m_n);
5494 }
5495
5496 static uint32_t ironlake_compute_dpll(struct intel_crtc *intel_crtc,
5497                                       intel_clock_t *clock, u32 *fp,
5498                                       intel_clock_t *reduced_clock, u32 *fp2)
5499 {
5500         struct drm_crtc *crtc = &intel_crtc->base;
5501         struct drm_device *dev = crtc->dev;
5502         struct drm_i915_private *dev_priv = dev->dev_private;
5503         struct intel_encoder *intel_encoder;
5504         uint32_t dpll;
5505         int factor, num_connectors = 0;
5506         bool is_lvds = false, is_sdvo = false, is_tv = false;
5507
5508         for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
5509                 switch (intel_encoder->type) {
5510                 case INTEL_OUTPUT_LVDS:
5511                         is_lvds = true;
5512                         break;
5513                 case INTEL_OUTPUT_SDVO:
5514                 case INTEL_OUTPUT_HDMI:
5515                         is_sdvo = true;
5516                         if (intel_encoder->needs_tv_clock)
5517                                 is_tv = true;
5518                         break;
5519                 case INTEL_OUTPUT_TVOUT:
5520                         is_tv = true;
5521                         break;
5522                 }
5523
5524                 num_connectors++;
5525         }
5526
5527         /* Enable autotuning of the PLL clock (if permissible) */
5528         factor = 21;
5529         if (is_lvds) {
5530                 if ((intel_panel_use_ssc(dev_priv) &&
5531                      dev_priv->lvds_ssc_freq == 100) ||
5532                     (HAS_PCH_IBX(dev) && intel_is_dual_link_lvds(dev)))
5533                         factor = 25;
5534         } else if (is_sdvo && is_tv)
5535                 factor = 20;
5536
5537         if (clock->m < factor * clock->n)
5538                 *fp |= FP_CB_TUNE;
5539
5540         if (fp2 && (reduced_clock->m < factor * reduced_clock->n))
5541                 *fp2 |= FP_CB_TUNE;
5542
5543         dpll = 0;
5544
5545         if (is_lvds)
5546                 dpll |= DPLLB_MODE_LVDS;
5547         else
5548                 dpll |= DPLLB_MODE_DAC_SERIAL;
5549         if (is_sdvo) {
5550                 if (intel_crtc->config.pixel_multiplier > 1) {
5551                         dpll |= (intel_crtc->config.pixel_multiplier - 1)
5552                                 << PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT;
5553                 }
5554                 dpll |= DPLL_DVO_HIGH_SPEED;
5555         }
5556         if (intel_crtc->config.has_dp_encoder &&
5557             intel_crtc->config.has_pch_encoder)
5558                 dpll |= DPLL_DVO_HIGH_SPEED;
5559
5560         /* compute bitmask from p1 value */
5561         dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
5562         /* also FPA1 */
5563         dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
5564
5565         switch (clock->p2) {
5566         case 5:
5567                 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
5568                 break;
5569         case 7:
5570                 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
5571                 break;
5572         case 10:
5573                 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
5574                 break;
5575         case 14:
5576                 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
5577                 break;
5578         }
5579
5580         if (is_sdvo && is_tv)
5581                 dpll |= PLL_REF_INPUT_TVCLKINBC;
5582         else if (is_tv)
5583                 /* XXX: just matching BIOS for now */
5584                 /*      dpll |= PLL_REF_INPUT_TVCLKINBC; */
5585                 dpll |= 3;
5586         else if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2)
5587                 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
5588         else
5589                 dpll |= PLL_REF_INPUT_DREFCLK;
5590
5591         return dpll;
5592 }
5593
5594 static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
5595                                   int x, int y,
5596                                   struct drm_framebuffer *fb)
5597 {
5598         struct drm_device *dev = crtc->dev;
5599         struct drm_i915_private *dev_priv = dev->dev_private;
5600         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5601         struct drm_display_mode *adjusted_mode =
5602                 &intel_crtc->config.adjusted_mode;
5603         struct drm_display_mode *mode = &intel_crtc->config.requested_mode;
5604         int pipe = intel_crtc->pipe;
5605         int plane = intel_crtc->plane;
5606         int num_connectors = 0;
5607         intel_clock_t clock, reduced_clock;
5608         u32 dpll, fp = 0, fp2 = 0;
5609         bool ok, has_reduced_clock = false;
5610         bool is_lvds = false;
5611         struct intel_encoder *encoder;
5612         int ret;
5613         bool dither, fdi_config_ok;
5614
5615         for_each_encoder_on_crtc(dev, crtc, encoder) {
5616                 switch (encoder->type) {
5617                 case INTEL_OUTPUT_LVDS:
5618                         is_lvds = true;
5619                         break;
5620                 }
5621
5622                 num_connectors++;
5623         }
5624
5625         WARN(!(HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)),
5626              "Unexpected PCH type %d\n", INTEL_PCH_TYPE(dev));
5627
5628         intel_crtc->config.cpu_transcoder = pipe;
5629
5630         ok = ironlake_compute_clocks(crtc, adjusted_mode, &clock,
5631                                      &has_reduced_clock, &reduced_clock);
5632         if (!ok) {
5633                 DRM_ERROR("Couldn't find PLL settings for mode!\n");
5634                 return -EINVAL;
5635         }
5636         /* Compat-code for transition, will disappear. */
5637         if (!intel_crtc->config.clock_set) {
5638                 intel_crtc->config.dpll.n = clock.n;
5639                 intel_crtc->config.dpll.m1 = clock.m1;
5640                 intel_crtc->config.dpll.m2 = clock.m2;
5641                 intel_crtc->config.dpll.p1 = clock.p1;
5642                 intel_crtc->config.dpll.p2 = clock.p2;
5643         }
5644
5645         /* Ensure that the cursor is valid for the new mode before changing... */
5646         intel_crtc_update_cursor(crtc, true);
5647
5648         /* determine panel color depth */
5649         dither = intel_crtc->config.dither;
5650         if (is_lvds && dev_priv->lvds_dither)
5651                 dither = true;
5652
5653         fp = clock.n << 16 | clock.m1 << 8 | clock.m2;
5654         if (has_reduced_clock)
5655                 fp2 = reduced_clock.n << 16 | reduced_clock.m1 << 8 |
5656                         reduced_clock.m2;
5657
5658         dpll = ironlake_compute_dpll(intel_crtc, &clock, &fp, &reduced_clock,
5659                                      has_reduced_clock ? &fp2 : NULL);
5660
5661         DRM_DEBUG_KMS("Mode for pipe %d:\n", pipe);
5662         drm_mode_debug_printmodeline(mode);
5663
5664         /* CPU eDP is the only output that doesn't need a PCH PLL of its own. */
5665         if (intel_crtc->config.has_pch_encoder) {
5666                 struct intel_pch_pll *pll;
5667
5668                 pll = intel_get_pch_pll(intel_crtc, dpll, fp);
5669                 if (pll == NULL) {
5670                         DRM_DEBUG_DRIVER("failed to find PLL for pipe %d\n",
5671                                          pipe);
5672                         return -EINVAL;
5673                 }
5674         } else
5675                 intel_put_pch_pll(intel_crtc);
5676
5677         if (intel_crtc->config.has_dp_encoder)
5678                 intel_dp_set_m_n(intel_crtc);
5679
5680         for_each_encoder_on_crtc(dev, crtc, encoder)
5681                 if (encoder->pre_pll_enable)
5682                         encoder->pre_pll_enable(encoder);
5683
5684         if (intel_crtc->pch_pll) {
5685                 I915_WRITE(intel_crtc->pch_pll->pll_reg, dpll);
5686
5687                 /* Wait for the clocks to stabilize. */
5688                 POSTING_READ(intel_crtc->pch_pll->pll_reg);
5689                 udelay(150);
5690
5691                 /* The pixel multiplier can only be updated once the
5692                  * DPLL is enabled and the clocks are stable.
5693                  *
5694                  * So write it again.
5695                  */
5696                 I915_WRITE(intel_crtc->pch_pll->pll_reg, dpll);
5697         }
5698
5699         intel_crtc->lowfreq_avail = false;
5700         if (intel_crtc->pch_pll) {
5701                 if (is_lvds && has_reduced_clock && i915_powersave) {
5702                         I915_WRITE(intel_crtc->pch_pll->fp1_reg, fp2);
5703                         intel_crtc->lowfreq_avail = true;
5704                 } else {
5705                         I915_WRITE(intel_crtc->pch_pll->fp1_reg, fp);
5706                 }
5707         }
5708
5709         intel_set_pipe_timings(intel_crtc, mode, adjusted_mode);
5710
5711         /* Note, this also computes intel_crtc->fdi_lanes which is used below in
5712          * ironlake_check_fdi_lanes. */
5713         intel_crtc->fdi_lanes = 0;
5714         if (intel_crtc->config.has_pch_encoder)
5715                 ironlake_fdi_set_m_n(crtc);
5716
5717         fdi_config_ok = ironlake_check_fdi_lanes(intel_crtc);
5718
5719         ironlake_set_pipeconf(crtc, adjusted_mode, dither);
5720
5721         intel_wait_for_vblank(dev, pipe);
5722
5723         /* Set up the display plane register */
5724         I915_WRITE(DSPCNTR(plane), DISPPLANE_GAMMA_ENABLE);
5725         POSTING_READ(DSPCNTR(plane));
5726
5727         ret = intel_pipe_set_base(crtc, x, y, fb);
5728
5729         intel_update_watermarks(dev);
5730
5731         intel_update_linetime_watermarks(dev, pipe, adjusted_mode);
5732
5733         return fdi_config_ok ? ret : -EINVAL;
5734 }
5735
5736 static bool ironlake_get_pipe_config(struct intel_crtc *crtc,
5737                                      struct intel_crtc_config *pipe_config)
5738 {
5739         struct drm_device *dev = crtc->base.dev;
5740         struct drm_i915_private *dev_priv = dev->dev_private;
5741         uint32_t tmp;
5742
5743         tmp = I915_READ(PIPECONF(crtc->pipe));
5744         if (!(tmp & PIPECONF_ENABLE))
5745                 return false;
5746
5747         if (I915_READ(TRANSCONF(crtc->pipe)) & TRANS_ENABLE)
5748                 pipe_config->has_pch_encoder = true;
5749
5750         return true;
5751 }
5752
5753 static void haswell_modeset_global_resources(struct drm_device *dev)
5754 {
5755         struct drm_i915_private *dev_priv = dev->dev_private;
5756         bool enable = false;
5757         struct intel_crtc *crtc;
5758         struct intel_encoder *encoder;
5759
5760         list_for_each_entry(crtc, &dev->mode_config.crtc_list, base.head) {
5761                 if (crtc->pipe != PIPE_A && crtc->base.enabled)
5762                         enable = true;
5763                 /* XXX: Should check for edp transcoder here, but thanks to init
5764                  * sequence that's not yet available. Just in case desktop eDP
5765                  * on PORT D is possible on haswell, too. */
5766         }
5767
5768         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
5769                             base.head) {
5770                 if (encoder->type != INTEL_OUTPUT_EDP &&
5771                     encoder->connectors_active)
5772                         enable = true;
5773         }
5774
5775         /* Even the eDP panel fitter is outside the always-on well. */
5776         if (dev_priv->pch_pf_size)
5777                 enable = true;
5778
5779         intel_set_power_well(dev, enable);
5780 }
5781
5782 static int haswell_crtc_mode_set(struct drm_crtc *crtc,
5783                                  int x, int y,
5784                                  struct drm_framebuffer *fb)
5785 {
5786         struct drm_device *dev = crtc->dev;
5787         struct drm_i915_private *dev_priv = dev->dev_private;
5788         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5789         struct drm_display_mode *adjusted_mode =
5790                 &intel_crtc->config.adjusted_mode;
5791         struct drm_display_mode *mode = &intel_crtc->config.requested_mode;
5792         int pipe = intel_crtc->pipe;
5793         int plane = intel_crtc->plane;
5794         int num_connectors = 0;
5795         bool is_cpu_edp = false;
5796         struct intel_encoder *encoder;
5797         int ret;
5798         bool dither;
5799
5800         for_each_encoder_on_crtc(dev, crtc, encoder) {
5801                 switch (encoder->type) {
5802                 case INTEL_OUTPUT_EDP:
5803                         if (!intel_encoder_is_pch_edp(&encoder->base))
5804                                 is_cpu_edp = true;
5805                         break;
5806                 }
5807
5808                 num_connectors++;
5809         }
5810
5811         if (is_cpu_edp)
5812                 intel_crtc->config.cpu_transcoder = TRANSCODER_EDP;
5813         else
5814                 intel_crtc->config.cpu_transcoder = pipe;
5815
5816         /* We are not sure yet this won't happen. */
5817         WARN(!HAS_PCH_LPT(dev), "Unexpected PCH type %d\n",
5818              INTEL_PCH_TYPE(dev));
5819
5820         WARN(num_connectors != 1, "%d connectors attached to pipe %c\n",
5821              num_connectors, pipe_name(pipe));
5822
5823         WARN_ON(I915_READ(PIPECONF(intel_crtc->config.cpu_transcoder)) &
5824                 (PIPECONF_ENABLE | I965_PIPECONF_ACTIVE));
5825
5826         WARN_ON(I915_READ(DSPCNTR(plane)) & DISPLAY_PLANE_ENABLE);
5827
5828         if (!intel_ddi_pll_mode_set(crtc, adjusted_mode->clock))
5829                 return -EINVAL;
5830
5831         /* Ensure that the cursor is valid for the new mode before changing... */
5832         intel_crtc_update_cursor(crtc, true);
5833
5834         /* determine panel color depth */
5835         dither = intel_crtc->config.dither;
5836
5837         DRM_DEBUG_KMS("Mode for pipe %d:\n", pipe);
5838         drm_mode_debug_printmodeline(mode);
5839
5840         if (intel_crtc->config.has_dp_encoder)
5841                 intel_dp_set_m_n(intel_crtc);
5842
5843         intel_crtc->lowfreq_avail = false;
5844
5845         intel_set_pipe_timings(intel_crtc, mode, adjusted_mode);
5846
5847         if (intel_crtc->config.has_pch_encoder)
5848                 ironlake_fdi_set_m_n(crtc);
5849
5850         haswell_set_pipeconf(crtc, adjusted_mode, dither);
5851
5852         intel_set_pipe_csc(crtc);
5853
5854         /* Set up the display plane register */
5855         I915_WRITE(DSPCNTR(plane), DISPPLANE_GAMMA_ENABLE | DISPPLANE_PIPE_CSC_ENABLE);
5856         POSTING_READ(DSPCNTR(plane));
5857
5858         ret = intel_pipe_set_base(crtc, x, y, fb);
5859
5860         intel_update_watermarks(dev);
5861
5862         intel_update_linetime_watermarks(dev, pipe, adjusted_mode);
5863
5864         return ret;
5865 }
5866
5867 static bool haswell_get_pipe_config(struct intel_crtc *crtc,
5868                                     struct intel_crtc_config *pipe_config)
5869 {
5870         struct drm_device *dev = crtc->base.dev;
5871         struct drm_i915_private *dev_priv = dev->dev_private;
5872         uint32_t tmp;
5873
5874         tmp = I915_READ(PIPECONF(crtc->config.cpu_transcoder));
5875         if (!(tmp & PIPECONF_ENABLE))
5876                 return false;
5877
5878         /*
5879          * aswell has only FDI/PCH transcoder A. It is which is connected to
5880          * DDI E. So just check whether this pipe is wired to DDI E and whether
5881          * the PCH transcoder is on.
5882          */
5883         tmp = I915_READ(TRANS_DDI_FUNC_CTL(crtc->pipe));
5884         if ((tmp & TRANS_DDI_PORT_MASK) == TRANS_DDI_SELECT_PORT(PORT_E) &&
5885             I915_READ(TRANSCONF(PIPE_A)) & TRANS_ENABLE)
5886                 pipe_config->has_pch_encoder = true;
5887
5888
5889         return true;
5890 }
5891
5892 static int intel_crtc_mode_set(struct drm_crtc *crtc,
5893                                int x, int y,
5894                                struct drm_framebuffer *fb)
5895 {
5896         struct drm_device *dev = crtc->dev;
5897         struct drm_i915_private *dev_priv = dev->dev_private;
5898         struct drm_encoder_helper_funcs *encoder_funcs;
5899         struct intel_encoder *encoder;
5900         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5901         struct drm_display_mode *adjusted_mode =
5902                 &intel_crtc->config.adjusted_mode;
5903         struct drm_display_mode *mode = &intel_crtc->config.requested_mode;
5904         int pipe = intel_crtc->pipe;
5905         int ret;
5906
5907         drm_vblank_pre_modeset(dev, pipe);
5908
5909         ret = dev_priv->display.crtc_mode_set(crtc, x, y, fb);
5910
5911         drm_vblank_post_modeset(dev, pipe);
5912
5913         if (ret != 0)
5914                 return ret;
5915
5916         for_each_encoder_on_crtc(dev, crtc, encoder) {
5917                 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
5918                         encoder->base.base.id,
5919                         drm_get_encoder_name(&encoder->base),
5920                         mode->base.id, mode->name);
5921                 if (encoder->mode_set) {
5922                         encoder->mode_set(encoder);
5923                 } else {
5924                         encoder_funcs = encoder->base.helper_private;
5925                         encoder_funcs->mode_set(&encoder->base, mode, adjusted_mode);
5926                 }
5927         }
5928
5929         return 0;
5930 }
5931
5932 static bool intel_eld_uptodate(struct drm_connector *connector,
5933                                int reg_eldv, uint32_t bits_eldv,
5934                                int reg_elda, uint32_t bits_elda,
5935                                int reg_edid)
5936 {
5937         struct drm_i915_private *dev_priv = connector->dev->dev_private;
5938         uint8_t *eld = connector->eld;
5939         uint32_t i;
5940
5941         i = I915_READ(reg_eldv);
5942         i &= bits_eldv;
5943
5944         if (!eld[0])
5945                 return !i;
5946
5947         if (!i)
5948                 return false;
5949
5950         i = I915_READ(reg_elda);
5951         i &= ~bits_elda;
5952         I915_WRITE(reg_elda, i);
5953
5954         for (i = 0; i < eld[2]; i++)
5955                 if (I915_READ(reg_edid) != *((uint32_t *)eld + i))
5956                         return false;
5957
5958         return true;
5959 }
5960
5961 static void g4x_write_eld(struct drm_connector *connector,
5962                           struct drm_crtc *crtc)
5963 {
5964         struct drm_i915_private *dev_priv = connector->dev->dev_private;
5965         uint8_t *eld = connector->eld;
5966         uint32_t eldv;
5967         uint32_t len;
5968         uint32_t i;
5969
5970         i = I915_READ(G4X_AUD_VID_DID);
5971
5972         if (i == INTEL_AUDIO_DEVBLC || i == INTEL_AUDIO_DEVCL)
5973                 eldv = G4X_ELDV_DEVCL_DEVBLC;
5974         else
5975                 eldv = G4X_ELDV_DEVCTG;
5976
5977         if (intel_eld_uptodate(connector,
5978                                G4X_AUD_CNTL_ST, eldv,
5979                                G4X_AUD_CNTL_ST, G4X_ELD_ADDR,
5980                                G4X_HDMIW_HDMIEDID))
5981                 return;
5982
5983         i = I915_READ(G4X_AUD_CNTL_ST);
5984         i &= ~(eldv | G4X_ELD_ADDR);
5985         len = (i >> 9) & 0x1f;          /* ELD buffer size */
5986         I915_WRITE(G4X_AUD_CNTL_ST, i);
5987
5988         if (!eld[0])
5989                 return;
5990
5991         len = min_t(uint8_t, eld[2], len);
5992         DRM_DEBUG_DRIVER("ELD size %d\n", len);
5993         for (i = 0; i < len; i++)
5994                 I915_WRITE(G4X_HDMIW_HDMIEDID, *((uint32_t *)eld + i));
5995
5996         i = I915_READ(G4X_AUD_CNTL_ST);
5997         i |= eldv;
5998         I915_WRITE(G4X_AUD_CNTL_ST, i);
5999 }
6000
6001 static void haswell_write_eld(struct drm_connector *connector,
6002                                      struct drm_crtc *crtc)
6003 {
6004         struct drm_i915_private *dev_priv = connector->dev->dev_private;
6005         uint8_t *eld = connector->eld;
6006         struct drm_device *dev = crtc->dev;
6007         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6008         uint32_t eldv;
6009         uint32_t i;
6010         int len;
6011         int pipe = to_intel_crtc(crtc)->pipe;
6012         int tmp;
6013
6014         int hdmiw_hdmiedid = HSW_AUD_EDID_DATA(pipe);
6015         int aud_cntl_st = HSW_AUD_DIP_ELD_CTRL(pipe);
6016         int aud_config = HSW_AUD_CFG(pipe);
6017         int aud_cntrl_st2 = HSW_AUD_PIN_ELD_CP_VLD;
6018
6019
6020         DRM_DEBUG_DRIVER("HDMI: Haswell Audio initialize....\n");
6021
6022         /* Audio output enable */
6023         DRM_DEBUG_DRIVER("HDMI audio: enable codec\n");
6024         tmp = I915_READ(aud_cntrl_st2);
6025         tmp |= (AUDIO_OUTPUT_ENABLE_A << (pipe * 4));
6026         I915_WRITE(aud_cntrl_st2, tmp);
6027
6028         /* Wait for 1 vertical blank */
6029         intel_wait_for_vblank(dev, pipe);
6030
6031         /* Set ELD valid state */
6032         tmp = I915_READ(aud_cntrl_st2);
6033         DRM_DEBUG_DRIVER("HDMI audio: pin eld vld status=0x%8x\n", tmp);
6034         tmp |= (AUDIO_ELD_VALID_A << (pipe * 4));
6035         I915_WRITE(aud_cntrl_st2, tmp);
6036         tmp = I915_READ(aud_cntrl_st2);
6037         DRM_DEBUG_DRIVER("HDMI audio: eld vld status=0x%8x\n", tmp);
6038
6039         /* Enable HDMI mode */
6040         tmp = I915_READ(aud_config);
6041         DRM_DEBUG_DRIVER("HDMI audio: audio conf: 0x%8x\n", tmp);
6042         /* clear N_programing_enable and N_value_index */
6043         tmp &= ~(AUD_CONFIG_N_VALUE_INDEX | AUD_CONFIG_N_PROG_ENABLE);
6044         I915_WRITE(aud_config, tmp);
6045
6046         DRM_DEBUG_DRIVER("ELD on pipe %c\n", pipe_name(pipe));
6047
6048         eldv = AUDIO_ELD_VALID_A << (pipe * 4);
6049         intel_crtc->eld_vld = true;
6050
6051         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
6052                 DRM_DEBUG_DRIVER("ELD: DisplayPort detected\n");
6053                 eld[5] |= (1 << 2);     /* Conn_Type, 0x1 = DisplayPort */
6054                 I915_WRITE(aud_config, AUD_CONFIG_N_VALUE_INDEX); /* 0x1 = DP */
6055         } else
6056                 I915_WRITE(aud_config, 0);
6057
6058         if (intel_eld_uptodate(connector,
6059                                aud_cntrl_st2, eldv,
6060                                aud_cntl_st, IBX_ELD_ADDRESS,
6061                                hdmiw_hdmiedid))
6062                 return;
6063
6064         i = I915_READ(aud_cntrl_st2);
6065         i &= ~eldv;
6066         I915_WRITE(aud_cntrl_st2, i);
6067
6068         if (!eld[0])
6069                 return;
6070
6071         i = I915_READ(aud_cntl_st);
6072         i &= ~IBX_ELD_ADDRESS;
6073         I915_WRITE(aud_cntl_st, i);
6074         i = (i >> 29) & DIP_PORT_SEL_MASK;              /* DIP_Port_Select, 0x1 = PortB */
6075         DRM_DEBUG_DRIVER("port num:%d\n", i);
6076
6077         len = min_t(uint8_t, eld[2], 21);       /* 84 bytes of hw ELD buffer */
6078         DRM_DEBUG_DRIVER("ELD size %d\n", len);
6079         for (i = 0; i < len; i++)
6080                 I915_WRITE(hdmiw_hdmiedid, *((uint32_t *)eld + i));
6081
6082         i = I915_READ(aud_cntrl_st2);
6083         i |= eldv;
6084         I915_WRITE(aud_cntrl_st2, i);
6085
6086 }
6087
6088 static void ironlake_write_eld(struct drm_connector *connector,
6089                                      struct drm_crtc *crtc)
6090 {
6091         struct drm_i915_private *dev_priv = connector->dev->dev_private;
6092         uint8_t *eld = connector->eld;
6093         uint32_t eldv;
6094         uint32_t i;
6095         int len;
6096         int hdmiw_hdmiedid;
6097         int aud_config;
6098         int aud_cntl_st;
6099         int aud_cntrl_st2;
6100         int pipe = to_intel_crtc(crtc)->pipe;
6101
6102         if (HAS_PCH_IBX(connector->dev)) {
6103                 hdmiw_hdmiedid = IBX_HDMIW_HDMIEDID(pipe);
6104                 aud_config = IBX_AUD_CFG(pipe);
6105                 aud_cntl_st = IBX_AUD_CNTL_ST(pipe);
6106                 aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
6107         } else {
6108                 hdmiw_hdmiedid = CPT_HDMIW_HDMIEDID(pipe);
6109                 aud_config = CPT_AUD_CFG(pipe);
6110                 aud_cntl_st = CPT_AUD_CNTL_ST(pipe);
6111                 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
6112         }
6113
6114         DRM_DEBUG_DRIVER("ELD on pipe %c\n", pipe_name(pipe));
6115
6116         i = I915_READ(aud_cntl_st);
6117         i = (i >> 29) & DIP_PORT_SEL_MASK;              /* DIP_Port_Select, 0x1 = PortB */
6118         if (!i) {
6119                 DRM_DEBUG_DRIVER("Audio directed to unknown port\n");
6120                 /* operate blindly on all ports */
6121                 eldv = IBX_ELD_VALIDB;
6122                 eldv |= IBX_ELD_VALIDB << 4;
6123                 eldv |= IBX_ELD_VALIDB << 8;
6124         } else {
6125                 DRM_DEBUG_DRIVER("ELD on port %c\n", 'A' + i);
6126                 eldv = IBX_ELD_VALIDB << ((i - 1) * 4);
6127         }
6128
6129         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
6130                 DRM_DEBUG_DRIVER("ELD: DisplayPort detected\n");
6131                 eld[5] |= (1 << 2);     /* Conn_Type, 0x1 = DisplayPort */
6132                 I915_WRITE(aud_config, AUD_CONFIG_N_VALUE_INDEX); /* 0x1 = DP */
6133         } else
6134                 I915_WRITE(aud_config, 0);
6135
6136         if (intel_eld_uptodate(connector,
6137                                aud_cntrl_st2, eldv,
6138                                aud_cntl_st, IBX_ELD_ADDRESS,
6139                                hdmiw_hdmiedid))
6140                 return;
6141
6142         i = I915_READ(aud_cntrl_st2);
6143         i &= ~eldv;
6144         I915_WRITE(aud_cntrl_st2, i);
6145
6146         if (!eld[0])
6147                 return;
6148
6149         i = I915_READ(aud_cntl_st);
6150         i &= ~IBX_ELD_ADDRESS;
6151         I915_WRITE(aud_cntl_st, i);
6152
6153         len = min_t(uint8_t, eld[2], 21);       /* 84 bytes of hw ELD buffer */
6154         DRM_DEBUG_DRIVER("ELD size %d\n", len);
6155         for (i = 0; i < len; i++)
6156                 I915_WRITE(hdmiw_hdmiedid, *((uint32_t *)eld + i));
6157
6158         i = I915_READ(aud_cntrl_st2);
6159         i |= eldv;
6160         I915_WRITE(aud_cntrl_st2, i);
6161 }
6162
6163 void intel_write_eld(struct drm_encoder *encoder,
6164                      struct drm_display_mode *mode)
6165 {
6166         struct drm_crtc *crtc = encoder->crtc;
6167         struct drm_connector *connector;
6168         struct drm_device *dev = encoder->dev;
6169         struct drm_i915_private *dev_priv = dev->dev_private;
6170
6171         connector = drm_select_eld(encoder, mode);
6172         if (!connector)
6173                 return;
6174
6175         DRM_DEBUG_DRIVER("ELD on [CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
6176                          connector->base.id,
6177                          drm_get_connector_name(connector),
6178                          connector->encoder->base.id,
6179                          drm_get_encoder_name(connector->encoder));
6180
6181         connector->eld[6] = drm_av_sync_delay(connector, mode) / 2;
6182
6183         if (dev_priv->display.write_eld)
6184                 dev_priv->display.write_eld(connector, crtc);
6185 }
6186
6187 /** Loads the palette/gamma unit for the CRTC with the prepared values */
6188 void intel_crtc_load_lut(struct drm_crtc *crtc)
6189 {
6190         struct drm_device *dev = crtc->dev;
6191         struct drm_i915_private *dev_priv = dev->dev_private;
6192         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6193         int palreg = PALETTE(intel_crtc->pipe);
6194         int i;
6195
6196         /* The clocks have to be on to load the palette. */
6197         if (!crtc->enabled || !intel_crtc->active)
6198                 return;
6199
6200         /* use legacy palette for Ironlake */
6201         if (HAS_PCH_SPLIT(dev))
6202                 palreg = LGC_PALETTE(intel_crtc->pipe);
6203
6204         for (i = 0; i < 256; i++) {
6205                 I915_WRITE(palreg + 4 * i,
6206                            (intel_crtc->lut_r[i] << 16) |
6207                            (intel_crtc->lut_g[i] << 8) |
6208                            intel_crtc->lut_b[i]);
6209         }
6210 }
6211
6212 static void i845_update_cursor(struct drm_crtc *crtc, u32 base)
6213 {
6214         struct drm_device *dev = crtc->dev;
6215         struct drm_i915_private *dev_priv = dev->dev_private;
6216         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6217         bool visible = base != 0;
6218         u32 cntl;
6219
6220         if (intel_crtc->cursor_visible == visible)
6221                 return;
6222
6223         cntl = I915_READ(_CURACNTR);
6224         if (visible) {
6225                 /* On these chipsets we can only modify the base whilst
6226                  * the cursor is disabled.
6227                  */
6228                 I915_WRITE(_CURABASE, base);
6229
6230                 cntl &= ~(CURSOR_FORMAT_MASK);
6231                 /* XXX width must be 64, stride 256 => 0x00 << 28 */
6232                 cntl |= CURSOR_ENABLE |
6233                         CURSOR_GAMMA_ENABLE |
6234                         CURSOR_FORMAT_ARGB;
6235         } else
6236                 cntl &= ~(CURSOR_ENABLE | CURSOR_GAMMA_ENABLE);
6237         I915_WRITE(_CURACNTR, cntl);
6238
6239         intel_crtc->cursor_visible = visible;
6240 }
6241
6242 static void i9xx_update_cursor(struct drm_crtc *crtc, u32 base)
6243 {
6244         struct drm_device *dev = crtc->dev;
6245         struct drm_i915_private *dev_priv = dev->dev_private;
6246         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6247         int pipe = intel_crtc->pipe;
6248         bool visible = base != 0;
6249
6250         if (intel_crtc->cursor_visible != visible) {
6251                 uint32_t cntl = I915_READ(CURCNTR(pipe));
6252                 if (base) {
6253                         cntl &= ~(CURSOR_MODE | MCURSOR_PIPE_SELECT);
6254                         cntl |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
6255                         cntl |= pipe << 28; /* Connect to correct pipe */
6256                 } else {
6257                         cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
6258                         cntl |= CURSOR_MODE_DISABLE;
6259                 }
6260                 I915_WRITE(CURCNTR(pipe), cntl);
6261
6262                 intel_crtc->cursor_visible = visible;
6263         }
6264         /* and commit changes on next vblank */
6265         POSTING_READ(CURCNTR(pipe));
6266         I915_WRITE(CURBASE(pipe), base);
6267         POSTING_READ(CURBASE(pipe));
6268 }
6269
6270 static void ivb_update_cursor(struct drm_crtc *crtc, u32 base)
6271 {
6272         struct drm_device *dev = crtc->dev;
6273         struct drm_i915_private *dev_priv = dev->dev_private;
6274         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6275         int pipe = intel_crtc->pipe;
6276         bool visible = base != 0;
6277
6278         if (intel_crtc->cursor_visible != visible) {
6279                 uint32_t cntl = I915_READ(CURCNTR_IVB(pipe));
6280                 if (base) {
6281                         cntl &= ~CURSOR_MODE;
6282                         cntl |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
6283                 } else {
6284                         cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
6285                         cntl |= CURSOR_MODE_DISABLE;
6286                 }
6287                 if (IS_HASWELL(dev))
6288                         cntl |= CURSOR_PIPE_CSC_ENABLE;
6289                 I915_WRITE(CURCNTR_IVB(pipe), cntl);
6290
6291                 intel_crtc->cursor_visible = visible;
6292         }
6293         /* and commit changes on next vblank */
6294         POSTING_READ(CURCNTR_IVB(pipe));
6295         I915_WRITE(CURBASE_IVB(pipe), base);
6296         POSTING_READ(CURBASE_IVB(pipe));
6297 }
6298
6299 /* If no-part of the cursor is visible on the framebuffer, then the GPU may hang... */
6300 static void intel_crtc_update_cursor(struct drm_crtc *crtc,
6301                                      bool on)
6302 {
6303         struct drm_device *dev = crtc->dev;
6304         struct drm_i915_private *dev_priv = dev->dev_private;
6305         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6306         int pipe = intel_crtc->pipe;
6307         int x = intel_crtc->cursor_x;
6308         int y = intel_crtc->cursor_y;
6309         u32 base, pos;
6310         bool visible;
6311
6312         pos = 0;
6313
6314         if (on && crtc->enabled && crtc->fb) {
6315                 base = intel_crtc->cursor_addr;
6316                 if (x > (int) crtc->fb->width)
6317                         base = 0;
6318
6319                 if (y > (int) crtc->fb->height)
6320                         base = 0;
6321         } else
6322                 base = 0;
6323
6324         if (x < 0) {
6325                 if (x + intel_crtc->cursor_width < 0)
6326                         base = 0;
6327
6328                 pos |= CURSOR_POS_SIGN << CURSOR_X_SHIFT;
6329                 x = -x;
6330         }
6331         pos |= x << CURSOR_X_SHIFT;
6332
6333         if (y < 0) {
6334                 if (y + intel_crtc->cursor_height < 0)
6335                         base = 0;
6336
6337                 pos |= CURSOR_POS_SIGN << CURSOR_Y_SHIFT;
6338                 y = -y;
6339         }
6340         pos |= y << CURSOR_Y_SHIFT;
6341
6342         visible = base != 0;
6343         if (!visible && !intel_crtc->cursor_visible)
6344                 return;
6345
6346         if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
6347                 I915_WRITE(CURPOS_IVB(pipe), pos);
6348                 ivb_update_cursor(crtc, base);
6349         } else {
6350                 I915_WRITE(CURPOS(pipe), pos);
6351                 if (IS_845G(dev) || IS_I865G(dev))
6352                         i845_update_cursor(crtc, base);
6353                 else
6354                         i9xx_update_cursor(crtc, base);
6355         }
6356 }
6357
6358 static int intel_crtc_cursor_set(struct drm_crtc *crtc,
6359                                  struct drm_file *file,
6360                                  uint32_t handle,
6361                                  uint32_t width, uint32_t height)
6362 {
6363         struct drm_device *dev = crtc->dev;
6364         struct drm_i915_private *dev_priv = dev->dev_private;
6365         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6366         struct drm_i915_gem_object *obj;
6367         uint32_t addr;
6368         int ret;
6369
6370         /* if we want to turn off the cursor ignore width and height */
6371         if (!handle) {
6372                 DRM_DEBUG_KMS("cursor off\n");
6373                 addr = 0;
6374                 obj = NULL;
6375                 mutex_lock(&dev->struct_mutex);
6376                 goto finish;
6377         }
6378
6379         /* Currently we only support 64x64 cursors */
6380         if (width != 64 || height != 64) {
6381                 DRM_ERROR("we currently only support 64x64 cursors\n");
6382                 return -EINVAL;
6383         }
6384
6385         obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle));
6386         if (&obj->base == NULL)
6387                 return -ENOENT;
6388
6389         if (obj->base.size < width * height * 4) {
6390                 DRM_ERROR("buffer is to small\n");
6391                 ret = -ENOMEM;
6392                 goto fail;
6393         }
6394
6395         /* we only need to pin inside GTT if cursor is non-phy */
6396         mutex_lock(&dev->struct_mutex);
6397         if (!dev_priv->info->cursor_needs_physical) {
6398                 unsigned alignment;
6399
6400                 if (obj->tiling_mode) {
6401                         DRM_ERROR("cursor cannot be tiled\n");
6402                         ret = -EINVAL;
6403                         goto fail_locked;
6404                 }
6405
6406                 /* Note that the w/a also requires 2 PTE of padding following
6407                  * the bo. We currently fill all unused PTE with the shadow
6408                  * page and so we should always have valid PTE following the
6409                  * cursor preventing the VT-d warning.
6410                  */
6411                 alignment = 0;
6412                 if (need_vtd_wa(dev))
6413                         alignment = 64*1024;
6414
6415                 ret = i915_gem_object_pin_to_display_plane(obj, alignment, NULL);
6416                 if (ret) {
6417                         DRM_ERROR("failed to move cursor bo into the GTT\n");
6418                         goto fail_locked;
6419                 }
6420
6421                 ret = i915_gem_object_put_fence(obj);
6422                 if (ret) {
6423                         DRM_ERROR("failed to release fence for cursor");
6424                         goto fail_unpin;
6425                 }
6426
6427                 addr = obj->gtt_offset;
6428         } else {
6429                 int align = IS_I830(dev) ? 16 * 1024 : 256;
6430                 ret = i915_gem_attach_phys_object(dev, obj,
6431                                                   (intel_crtc->pipe == 0) ? I915_GEM_PHYS_CURSOR_0 : I915_GEM_PHYS_CURSOR_1,
6432                                                   align);
6433                 if (ret) {
6434                         DRM_ERROR("failed to attach phys object\n");
6435                         goto fail_locked;
6436                 }
6437                 addr = obj->phys_obj->handle->busaddr;
6438         }
6439
6440         if (IS_GEN2(dev))
6441                 I915_WRITE(CURSIZE, (height << 12) | width);
6442
6443  finish:
6444         if (intel_crtc->cursor_bo) {
6445                 if (dev_priv->info->cursor_needs_physical) {
6446                         if (intel_crtc->cursor_bo != obj)
6447                                 i915_gem_detach_phys_object(dev, intel_crtc->cursor_bo);
6448                 } else
6449                         i915_gem_object_unpin(intel_crtc->cursor_bo);
6450                 drm_gem_object_unreference(&intel_crtc->cursor_bo->base);
6451         }
6452
6453         mutex_unlock(&dev->struct_mutex);
6454
6455         intel_crtc->cursor_addr = addr;
6456         intel_crtc->cursor_bo = obj;
6457         intel_crtc->cursor_width = width;
6458         intel_crtc->cursor_height = height;
6459
6460         intel_crtc_update_cursor(crtc, true);
6461
6462         return 0;
6463 fail_unpin:
6464         i915_gem_object_unpin(obj);
6465 fail_locked:
6466         mutex_unlock(&dev->struct_mutex);
6467 fail:
6468         drm_gem_object_unreference_unlocked(&obj->base);
6469         return ret;
6470 }
6471
6472 static int intel_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
6473 {
6474         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6475
6476         intel_crtc->cursor_x = x;
6477         intel_crtc->cursor_y = y;
6478
6479         intel_crtc_update_cursor(crtc, true);
6480
6481         return 0;
6482 }
6483
6484 /** Sets the color ramps on behalf of RandR */
6485 void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
6486                                  u16 blue, int regno)
6487 {
6488         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6489
6490         intel_crtc->lut_r[regno] = red >> 8;
6491         intel_crtc->lut_g[regno] = green >> 8;
6492         intel_crtc->lut_b[regno] = blue >> 8;
6493 }
6494
6495 void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
6496                              u16 *blue, int regno)
6497 {
6498         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6499
6500         *red = intel_crtc->lut_r[regno] << 8;
6501         *green = intel_crtc->lut_g[regno] << 8;
6502         *blue = intel_crtc->lut_b[regno] << 8;
6503 }
6504
6505 static void intel_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
6506                                  u16 *blue, uint32_t start, uint32_t size)
6507 {
6508         int end = (start + size > 256) ? 256 : start + size, i;
6509         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6510
6511         for (i = start; i < end; i++) {
6512                 intel_crtc->lut_r[i] = red[i] >> 8;
6513                 intel_crtc->lut_g[i] = green[i] >> 8;
6514                 intel_crtc->lut_b[i] = blue[i] >> 8;
6515         }
6516
6517         intel_crtc_load_lut(crtc);
6518 }
6519
6520 /* VESA 640x480x72Hz mode to set on the pipe */
6521 static struct drm_display_mode load_detect_mode = {
6522         DRM_MODE("640x480", DRM_MODE_TYPE_DEFAULT, 31500, 640, 664,
6523                  704, 832, 0, 480, 489, 491, 520, 0, DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC),
6524 };
6525
6526 static struct drm_framebuffer *
6527 intel_framebuffer_create(struct drm_device *dev,
6528                          struct drm_mode_fb_cmd2 *mode_cmd,
6529                          struct drm_i915_gem_object *obj)
6530 {
6531         struct intel_framebuffer *intel_fb;
6532         int ret;
6533
6534         intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
6535         if (!intel_fb) {
6536                 drm_gem_object_unreference_unlocked(&obj->base);
6537                 return ERR_PTR(-ENOMEM);
6538         }
6539
6540         ret = intel_framebuffer_init(dev, intel_fb, mode_cmd, obj);
6541         if (ret) {
6542                 drm_gem_object_unreference_unlocked(&obj->base);
6543                 kfree(intel_fb);
6544                 return ERR_PTR(ret);
6545         }
6546
6547         return &intel_fb->base;
6548 }
6549
6550 static u32
6551 intel_framebuffer_pitch_for_width(int width, int bpp)
6552 {
6553         u32 pitch = DIV_ROUND_UP(width * bpp, 8);
6554         return ALIGN(pitch, 64);
6555 }
6556
6557 static u32
6558 intel_framebuffer_size_for_mode(struct drm_display_mode *mode, int bpp)
6559 {
6560         u32 pitch = intel_framebuffer_pitch_for_width(mode->hdisplay, bpp);
6561         return ALIGN(pitch * mode->vdisplay, PAGE_SIZE);
6562 }
6563
6564 static struct drm_framebuffer *
6565 intel_framebuffer_create_for_mode(struct drm_device *dev,
6566                                   struct drm_display_mode *mode,
6567                                   int depth, int bpp)
6568 {
6569         struct drm_i915_gem_object *obj;
6570         struct drm_mode_fb_cmd2 mode_cmd = { 0 };
6571
6572         obj = i915_gem_alloc_object(dev,
6573                                     intel_framebuffer_size_for_mode(mode, bpp));
6574         if (obj == NULL)
6575                 return ERR_PTR(-ENOMEM);
6576
6577         mode_cmd.width = mode->hdisplay;
6578         mode_cmd.height = mode->vdisplay;
6579         mode_cmd.pitches[0] = intel_framebuffer_pitch_for_width(mode_cmd.width,
6580                                                                 bpp);
6581         mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
6582
6583         return intel_framebuffer_create(dev, &mode_cmd, obj);
6584 }
6585
6586 static struct drm_framebuffer *
6587 mode_fits_in_fbdev(struct drm_device *dev,
6588                    struct drm_display_mode *mode)
6589 {
6590         struct drm_i915_private *dev_priv = dev->dev_private;
6591         struct drm_i915_gem_object *obj;
6592         struct drm_framebuffer *fb;
6593
6594         if (dev_priv->fbdev == NULL)
6595                 return NULL;
6596
6597         obj = dev_priv->fbdev->ifb.obj;
6598         if (obj == NULL)
6599                 return NULL;
6600
6601         fb = &dev_priv->fbdev->ifb.base;
6602         if (fb->pitches[0] < intel_framebuffer_pitch_for_width(mode->hdisplay,
6603                                                                fb->bits_per_pixel))
6604                 return NULL;
6605
6606         if (obj->base.size < mode->vdisplay * fb->pitches[0])
6607                 return NULL;
6608
6609         return fb;
6610 }
6611
6612 bool intel_get_load_detect_pipe(struct drm_connector *connector,
6613                                 struct drm_display_mode *mode,
6614                                 struct intel_load_detect_pipe *old)
6615 {
6616         struct intel_crtc *intel_crtc;
6617         struct intel_encoder *intel_encoder =
6618                 intel_attached_encoder(connector);
6619         struct drm_crtc *possible_crtc;
6620         struct drm_encoder *encoder = &intel_encoder->base;
6621         struct drm_crtc *crtc = NULL;
6622         struct drm_device *dev = encoder->dev;
6623         struct drm_framebuffer *fb;
6624         int i = -1;
6625
6626         DRM_DEBUG_KMS("[CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
6627                       connector->base.id, drm_get_connector_name(connector),
6628                       encoder->base.id, drm_get_encoder_name(encoder));
6629
6630         /*
6631          * Algorithm gets a little messy:
6632          *
6633          *   - if the connector already has an assigned crtc, use it (but make
6634          *     sure it's on first)
6635          *
6636          *   - try to find the first unused crtc that can drive this connector,
6637          *     and use that if we find one
6638          */
6639
6640         /* See if we already have a CRTC for this connector */
6641         if (encoder->crtc) {
6642                 crtc = encoder->crtc;
6643
6644                 mutex_lock(&crtc->mutex);
6645
6646                 old->dpms_mode = connector->dpms;
6647                 old->load_detect_temp = false;
6648
6649                 /* Make sure the crtc and connector are running */
6650                 if (connector->dpms != DRM_MODE_DPMS_ON)
6651                         connector->funcs->dpms(connector, DRM_MODE_DPMS_ON);
6652
6653                 return true;
6654         }
6655
6656         /* Find an unused one (if possible) */
6657         list_for_each_entry(possible_crtc, &dev->mode_config.crtc_list, head) {
6658                 i++;
6659                 if (!(encoder->possible_crtcs & (1 << i)))
6660                         continue;
6661                 if (!possible_crtc->enabled) {
6662                         crtc = possible_crtc;
6663                         break;
6664                 }
6665         }
6666
6667         /*
6668          * If we didn't find an unused CRTC, don't use any.
6669          */
6670         if (!crtc) {
6671                 DRM_DEBUG_KMS("no pipe available for load-detect\n");
6672                 return false;
6673         }
6674
6675         mutex_lock(&crtc->mutex);
6676         intel_encoder->new_crtc = to_intel_crtc(crtc);
6677         to_intel_connector(connector)->new_encoder = intel_encoder;
6678
6679         intel_crtc = to_intel_crtc(crtc);
6680         old->dpms_mode = connector->dpms;
6681         old->load_detect_temp = true;
6682         old->release_fb = NULL;
6683
6684         if (!mode)
6685                 mode = &load_detect_mode;
6686
6687         /* We need a framebuffer large enough to accommodate all accesses
6688          * that the plane may generate whilst we perform load detection.
6689          * We can not rely on the fbcon either being present (we get called
6690          * during its initialisation to detect all boot displays, or it may
6691          * not even exist) or that it is large enough to satisfy the
6692          * requested mode.
6693          */
6694         fb = mode_fits_in_fbdev(dev, mode);
6695         if (fb == NULL) {
6696                 DRM_DEBUG_KMS("creating tmp fb for load-detection\n");
6697                 fb = intel_framebuffer_create_for_mode(dev, mode, 24, 32);
6698                 old->release_fb = fb;
6699         } else
6700                 DRM_DEBUG_KMS("reusing fbdev for load-detection framebuffer\n");
6701         if (IS_ERR(fb)) {
6702                 DRM_DEBUG_KMS("failed to allocate framebuffer for load-detection\n");
6703                 mutex_unlock(&crtc->mutex);
6704                 return false;
6705         }
6706
6707         if (intel_set_mode(crtc, mode, 0, 0, fb)) {
6708                 DRM_DEBUG_KMS("failed to set mode on load-detect pipe\n");
6709                 if (old->release_fb)
6710                         old->release_fb->funcs->destroy(old->release_fb);
6711                 mutex_unlock(&crtc->mutex);
6712                 return false;
6713         }
6714
6715         /* let the connector get through one full cycle before testing */
6716         intel_wait_for_vblank(dev, intel_crtc->pipe);
6717         return true;
6718 }
6719
6720 void intel_release_load_detect_pipe(struct drm_connector *connector,
6721                                     struct intel_load_detect_pipe *old)
6722 {
6723         struct intel_encoder *intel_encoder =
6724                 intel_attached_encoder(connector);
6725         struct drm_encoder *encoder = &intel_encoder->base;
6726         struct drm_crtc *crtc = encoder->crtc;
6727
6728         DRM_DEBUG_KMS("[CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
6729                       connector->base.id, drm_get_connector_name(connector),
6730                       encoder->base.id, drm_get_encoder_name(encoder));
6731
6732         if (old->load_detect_temp) {
6733                 to_intel_connector(connector)->new_encoder = NULL;
6734                 intel_encoder->new_crtc = NULL;
6735                 intel_set_mode(crtc, NULL, 0, 0, NULL);
6736
6737                 if (old->release_fb) {
6738                         drm_framebuffer_unregister_private(old->release_fb);
6739                         drm_framebuffer_unreference(old->release_fb);
6740                 }
6741
6742                 mutex_unlock(&crtc->mutex);
6743                 return;
6744         }
6745
6746         /* Switch crtc and encoder back off if necessary */
6747         if (old->dpms_mode != DRM_MODE_DPMS_ON)
6748                 connector->funcs->dpms(connector, old->dpms_mode);
6749
6750         mutex_unlock(&crtc->mutex);
6751 }
6752
6753 /* Returns the clock of the currently programmed mode of the given pipe. */
6754 static int intel_crtc_clock_get(struct drm_device *dev, struct drm_crtc *crtc)
6755 {
6756         struct drm_i915_private *dev_priv = dev->dev_private;
6757         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6758         int pipe = intel_crtc->pipe;
6759         u32 dpll = I915_READ(DPLL(pipe));
6760         u32 fp;
6761         intel_clock_t clock;
6762
6763         if ((dpll & DISPLAY_RATE_SELECT_FPA1) == 0)
6764                 fp = I915_READ(FP0(pipe));
6765         else
6766                 fp = I915_READ(FP1(pipe));
6767
6768         clock.m1 = (fp & FP_M1_DIV_MASK) >> FP_M1_DIV_SHIFT;
6769         if (IS_PINEVIEW(dev)) {
6770                 clock.n = ffs((fp & FP_N_PINEVIEW_DIV_MASK) >> FP_N_DIV_SHIFT) - 1;
6771                 clock.m2 = (fp & FP_M2_PINEVIEW_DIV_MASK) >> FP_M2_DIV_SHIFT;
6772         } else {
6773                 clock.n = (fp & FP_N_DIV_MASK) >> FP_N_DIV_SHIFT;
6774                 clock.m2 = (fp & FP_M2_DIV_MASK) >> FP_M2_DIV_SHIFT;
6775         }
6776
6777         if (!IS_GEN2(dev)) {
6778                 if (IS_PINEVIEW(dev))
6779                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_PINEVIEW) >>
6780                                 DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW);
6781                 else
6782                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK) >>
6783                                DPLL_FPA01_P1_POST_DIV_SHIFT);
6784
6785                 switch (dpll & DPLL_MODE_MASK) {
6786                 case DPLLB_MODE_DAC_SERIAL:
6787                         clock.p2 = dpll & DPLL_DAC_SERIAL_P2_CLOCK_DIV_5 ?
6788                                 5 : 10;
6789                         break;
6790                 case DPLLB_MODE_LVDS:
6791                         clock.p2 = dpll & DPLLB_LVDS_P2_CLOCK_DIV_7 ?
6792                                 7 : 14;
6793                         break;
6794                 default:
6795                         DRM_DEBUG_KMS("Unknown DPLL mode %08x in programmed "
6796                                   "mode\n", (int)(dpll & DPLL_MODE_MASK));
6797                         return 0;
6798                 }
6799
6800                 /* XXX: Handle the 100Mhz refclk */
6801                 intel_clock(dev, 96000, &clock);
6802         } else {
6803                 bool is_lvds = (pipe == 1) && (I915_READ(LVDS) & LVDS_PORT_EN);
6804
6805                 if (is_lvds) {
6806                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830_LVDS) >>
6807                                        DPLL_FPA01_P1_POST_DIV_SHIFT);
6808                         clock.p2 = 14;
6809
6810                         if ((dpll & PLL_REF_INPUT_MASK) ==
6811                             PLLB_REF_INPUT_SPREADSPECTRUMIN) {
6812                                 /* XXX: might not be 66MHz */
6813                                 intel_clock(dev, 66000, &clock);
6814                         } else
6815                                 intel_clock(dev, 48000, &clock);
6816                 } else {
6817                         if (dpll & PLL_P1_DIVIDE_BY_TWO)
6818                                 clock.p1 = 2;
6819                         else {
6820                                 clock.p1 = ((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830) >>
6821                                             DPLL_FPA01_P1_POST_DIV_SHIFT) + 2;
6822                         }
6823                         if (dpll & PLL_P2_DIVIDE_BY_4)
6824                                 clock.p2 = 4;
6825                         else
6826                                 clock.p2 = 2;
6827
6828                         intel_clock(dev, 48000, &clock);
6829                 }
6830         }
6831
6832         /* XXX: It would be nice to validate the clocks, but we can't reuse
6833          * i830PllIsValid() because it relies on the xf86_config connector
6834          * configuration being accurate, which it isn't necessarily.
6835          */
6836
6837         return clock.dot;
6838 }
6839
6840 /** Returns the currently programmed mode of the given pipe. */
6841 struct drm_display_mode *intel_crtc_mode_get(struct drm_device *dev,
6842                                              struct drm_crtc *crtc)
6843 {
6844         struct drm_i915_private *dev_priv = dev->dev_private;
6845         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6846         enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
6847         struct drm_display_mode *mode;
6848         int htot = I915_READ(HTOTAL(cpu_transcoder));
6849         int hsync = I915_READ(HSYNC(cpu_transcoder));
6850         int vtot = I915_READ(VTOTAL(cpu_transcoder));
6851         int vsync = I915_READ(VSYNC(cpu_transcoder));
6852
6853         mode = kzalloc(sizeof(*mode), GFP_KERNEL);
6854         if (!mode)
6855                 return NULL;
6856
6857         mode->clock = intel_crtc_clock_get(dev, crtc);
6858         mode->hdisplay = (htot & 0xffff) + 1;
6859         mode->htotal = ((htot & 0xffff0000) >> 16) + 1;
6860         mode->hsync_start = (hsync & 0xffff) + 1;
6861         mode->hsync_end = ((hsync & 0xffff0000) >> 16) + 1;
6862         mode->vdisplay = (vtot & 0xffff) + 1;
6863         mode->vtotal = ((vtot & 0xffff0000) >> 16) + 1;
6864         mode->vsync_start = (vsync & 0xffff) + 1;
6865         mode->vsync_end = ((vsync & 0xffff0000) >> 16) + 1;
6866
6867         drm_mode_set_name(mode);
6868
6869         return mode;
6870 }
6871
6872 static void intel_increase_pllclock(struct drm_crtc *crtc)
6873 {
6874         struct drm_device *dev = crtc->dev;
6875         drm_i915_private_t *dev_priv = dev->dev_private;
6876         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6877         int pipe = intel_crtc->pipe;
6878         int dpll_reg = DPLL(pipe);
6879         int dpll;
6880
6881         if (HAS_PCH_SPLIT(dev))
6882                 return;
6883
6884         if (!dev_priv->lvds_downclock_avail)
6885                 return;
6886
6887         dpll = I915_READ(dpll_reg);
6888         if (!HAS_PIPE_CXSR(dev) && (dpll & DISPLAY_RATE_SELECT_FPA1)) {
6889                 DRM_DEBUG_DRIVER("upclocking LVDS\n");
6890
6891                 assert_panel_unlocked(dev_priv, pipe);
6892
6893                 dpll &= ~DISPLAY_RATE_SELECT_FPA1;
6894                 I915_WRITE(dpll_reg, dpll);
6895                 intel_wait_for_vblank(dev, pipe);
6896
6897                 dpll = I915_READ(dpll_reg);
6898                 if (dpll & DISPLAY_RATE_SELECT_FPA1)
6899                         DRM_DEBUG_DRIVER("failed to upclock LVDS!\n");
6900         }
6901 }
6902
6903 static void intel_decrease_pllclock(struct drm_crtc *crtc)
6904 {
6905         struct drm_device *dev = crtc->dev;
6906         drm_i915_private_t *dev_priv = dev->dev_private;
6907         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6908
6909         if (HAS_PCH_SPLIT(dev))
6910                 return;
6911
6912         if (!dev_priv->lvds_downclock_avail)
6913                 return;
6914
6915         /*
6916          * Since this is called by a timer, we should never get here in
6917          * the manual case.
6918          */
6919         if (!HAS_PIPE_CXSR(dev) && intel_crtc->lowfreq_avail) {
6920                 int pipe = intel_crtc->pipe;
6921                 int dpll_reg = DPLL(pipe);
6922                 int dpll;
6923
6924                 DRM_DEBUG_DRIVER("downclocking LVDS\n");
6925
6926                 assert_panel_unlocked(dev_priv, pipe);
6927
6928                 dpll = I915_READ(dpll_reg);
6929                 dpll |= DISPLAY_RATE_SELECT_FPA1;
6930                 I915_WRITE(dpll_reg, dpll);
6931                 intel_wait_for_vblank(dev, pipe);
6932                 dpll = I915_READ(dpll_reg);
6933                 if (!(dpll & DISPLAY_RATE_SELECT_FPA1))
6934                         DRM_DEBUG_DRIVER("failed to downclock LVDS!\n");
6935         }
6936
6937 }
6938
6939 void intel_mark_busy(struct drm_device *dev)
6940 {
6941         i915_update_gfx_val(dev->dev_private);
6942 }
6943
6944 void intel_mark_idle(struct drm_device *dev)
6945 {
6946         struct drm_crtc *crtc;
6947
6948         if (!i915_powersave)
6949                 return;
6950
6951         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
6952                 if (!crtc->fb)
6953                         continue;
6954
6955                 intel_decrease_pllclock(crtc);
6956         }
6957 }
6958
6959 void intel_mark_fb_busy(struct drm_i915_gem_object *obj)
6960 {
6961         struct drm_device *dev = obj->base.dev;
6962         struct drm_crtc *crtc;
6963
6964         if (!i915_powersave)
6965                 return;
6966
6967         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
6968                 if (!crtc->fb)
6969                         continue;
6970
6971                 if (to_intel_framebuffer(crtc->fb)->obj == obj)
6972                         intel_increase_pllclock(crtc);
6973         }
6974 }
6975
6976 static void intel_crtc_destroy(struct drm_crtc *crtc)
6977 {
6978         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6979         struct drm_device *dev = crtc->dev;
6980         struct intel_unpin_work *work;
6981         unsigned long flags;
6982
6983         spin_lock_irqsave(&dev->event_lock, flags);
6984         work = intel_crtc->unpin_work;
6985         intel_crtc->unpin_work = NULL;
6986         spin_unlock_irqrestore(&dev->event_lock, flags);
6987
6988         if (work) {
6989                 cancel_work_sync(&work->work);
6990                 kfree(work);
6991         }
6992
6993         drm_crtc_cleanup(crtc);
6994
6995         kfree(intel_crtc);
6996 }
6997
6998 static void intel_unpin_work_fn(struct work_struct *__work)
6999 {
7000         struct intel_unpin_work *work =
7001                 container_of(__work, struct intel_unpin_work, work);
7002         struct drm_device *dev = work->crtc->dev;
7003
7004         mutex_lock(&dev->struct_mutex);
7005         intel_unpin_fb_obj(work->old_fb_obj);
7006         drm_gem_object_unreference(&work->pending_flip_obj->base);
7007         drm_gem_object_unreference(&work->old_fb_obj->base);
7008
7009         intel_update_fbc(dev);
7010         mutex_unlock(&dev->struct_mutex);
7011
7012         BUG_ON(atomic_read(&to_intel_crtc(work->crtc)->unpin_work_count) == 0);
7013         atomic_dec(&to_intel_crtc(work->crtc)->unpin_work_count);
7014
7015         kfree(work);
7016 }
7017
7018 static void do_intel_finish_page_flip(struct drm_device *dev,
7019                                       struct drm_crtc *crtc)
7020 {
7021         drm_i915_private_t *dev_priv = dev->dev_private;
7022         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7023         struct intel_unpin_work *work;
7024         unsigned long flags;
7025
7026         /* Ignore early vblank irqs */
7027         if (intel_crtc == NULL)
7028                 return;
7029
7030         spin_lock_irqsave(&dev->event_lock, flags);
7031         work = intel_crtc->unpin_work;
7032
7033         /* Ensure we don't miss a work->pending update ... */
7034         smp_rmb();
7035
7036         if (work == NULL || atomic_read(&work->pending) < INTEL_FLIP_COMPLETE) {
7037                 spin_unlock_irqrestore(&dev->event_lock, flags);
7038                 return;
7039         }
7040
7041         /* and that the unpin work is consistent wrt ->pending. */
7042         smp_rmb();
7043
7044         intel_crtc->unpin_work = NULL;
7045
7046         if (work->event)
7047                 drm_send_vblank_event(dev, intel_crtc->pipe, work->event);
7048
7049         drm_vblank_put(dev, intel_crtc->pipe);
7050
7051         spin_unlock_irqrestore(&dev->event_lock, flags);
7052
7053         wake_up_all(&dev_priv->pending_flip_queue);
7054
7055         queue_work(dev_priv->wq, &work->work);
7056
7057         trace_i915_flip_complete(intel_crtc->plane, work->pending_flip_obj);
7058 }
7059
7060 void intel_finish_page_flip(struct drm_device *dev, int pipe)
7061 {
7062         drm_i915_private_t *dev_priv = dev->dev_private;
7063         struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
7064
7065         do_intel_finish_page_flip(dev, crtc);
7066 }
7067
7068 void intel_finish_page_flip_plane(struct drm_device *dev, int plane)
7069 {
7070         drm_i915_private_t *dev_priv = dev->dev_private;
7071         struct drm_crtc *crtc = dev_priv->plane_to_crtc_mapping[plane];
7072
7073         do_intel_finish_page_flip(dev, crtc);
7074 }
7075
7076 void intel_prepare_page_flip(struct drm_device *dev, int plane)
7077 {
7078         drm_i915_private_t *dev_priv = dev->dev_private;
7079         struct intel_crtc *intel_crtc =
7080                 to_intel_crtc(dev_priv->plane_to_crtc_mapping[plane]);
7081         unsigned long flags;
7082
7083         /* NB: An MMIO update of the plane base pointer will also
7084          * generate a page-flip completion irq, i.e. every modeset
7085          * is also accompanied by a spurious intel_prepare_page_flip().
7086          */
7087         spin_lock_irqsave(&dev->event_lock, flags);
7088         if (intel_crtc->unpin_work)
7089                 atomic_inc_not_zero(&intel_crtc->unpin_work->pending);
7090         spin_unlock_irqrestore(&dev->event_lock, flags);
7091 }
7092
7093 inline static void intel_mark_page_flip_active(struct intel_crtc *intel_crtc)
7094 {
7095         /* Ensure that the work item is consistent when activating it ... */
7096         smp_wmb();
7097         atomic_set(&intel_crtc->unpin_work->pending, INTEL_FLIP_PENDING);
7098         /* and that it is marked active as soon as the irq could fire. */
7099         smp_wmb();
7100 }
7101
7102 static int intel_gen2_queue_flip(struct drm_device *dev,
7103                                  struct drm_crtc *crtc,
7104                                  struct drm_framebuffer *fb,
7105                                  struct drm_i915_gem_object *obj)
7106 {
7107         struct drm_i915_private *dev_priv = dev->dev_private;
7108         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7109         u32 flip_mask;
7110         struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
7111         int ret;
7112
7113         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7114         if (ret)
7115                 goto err;
7116
7117         ret = intel_ring_begin(ring, 6);
7118         if (ret)
7119                 goto err_unpin;
7120
7121         /* Can't queue multiple flips, so wait for the previous
7122          * one to finish before executing the next.
7123          */
7124         if (intel_crtc->plane)
7125                 flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
7126         else
7127                 flip_mask = MI_WAIT_FOR_PLANE_A_FLIP;
7128         intel_ring_emit(ring, MI_WAIT_FOR_EVENT | flip_mask);
7129         intel_ring_emit(ring, MI_NOOP);
7130         intel_ring_emit(ring, MI_DISPLAY_FLIP |
7131                         MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7132         intel_ring_emit(ring, fb->pitches[0]);
7133         intel_ring_emit(ring, obj->gtt_offset + intel_crtc->dspaddr_offset);
7134         intel_ring_emit(ring, 0); /* aux display base address, unused */
7135
7136         intel_mark_page_flip_active(intel_crtc);
7137         intel_ring_advance(ring);
7138         return 0;
7139
7140 err_unpin:
7141         intel_unpin_fb_obj(obj);
7142 err:
7143         return ret;
7144 }
7145
7146 static int intel_gen3_queue_flip(struct drm_device *dev,
7147                                  struct drm_crtc *crtc,
7148                                  struct drm_framebuffer *fb,
7149                                  struct drm_i915_gem_object *obj)
7150 {
7151         struct drm_i915_private *dev_priv = dev->dev_private;
7152         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7153         u32 flip_mask;
7154         struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
7155         int ret;
7156
7157         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7158         if (ret)
7159                 goto err;
7160
7161         ret = intel_ring_begin(ring, 6);
7162         if (ret)
7163                 goto err_unpin;
7164
7165         if (intel_crtc->plane)
7166                 flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
7167         else
7168                 flip_mask = MI_WAIT_FOR_PLANE_A_FLIP;
7169         intel_ring_emit(ring, MI_WAIT_FOR_EVENT | flip_mask);
7170         intel_ring_emit(ring, MI_NOOP);
7171         intel_ring_emit(ring, MI_DISPLAY_FLIP_I915 |
7172                         MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7173         intel_ring_emit(ring, fb->pitches[0]);
7174         intel_ring_emit(ring, obj->gtt_offset + intel_crtc->dspaddr_offset);
7175         intel_ring_emit(ring, MI_NOOP);
7176
7177         intel_mark_page_flip_active(intel_crtc);
7178         intel_ring_advance(ring);
7179         return 0;
7180
7181 err_unpin:
7182         intel_unpin_fb_obj(obj);
7183 err:
7184         return ret;
7185 }
7186
7187 static int intel_gen4_queue_flip(struct drm_device *dev,
7188                                  struct drm_crtc *crtc,
7189                                  struct drm_framebuffer *fb,
7190                                  struct drm_i915_gem_object *obj)
7191 {
7192         struct drm_i915_private *dev_priv = dev->dev_private;
7193         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7194         uint32_t pf, pipesrc;
7195         struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
7196         int ret;
7197
7198         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7199         if (ret)
7200                 goto err;
7201
7202         ret = intel_ring_begin(ring, 4);
7203         if (ret)
7204                 goto err_unpin;
7205
7206         /* i965+ uses the linear or tiled offsets from the
7207          * Display Registers (which do not change across a page-flip)
7208          * so we need only reprogram the base address.
7209          */
7210         intel_ring_emit(ring, MI_DISPLAY_FLIP |
7211                         MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7212         intel_ring_emit(ring, fb->pitches[0]);
7213         intel_ring_emit(ring,
7214                         (obj->gtt_offset + intel_crtc->dspaddr_offset) |
7215                         obj->tiling_mode);
7216
7217         /* XXX Enabling the panel-fitter across page-flip is so far
7218          * untested on non-native modes, so ignore it for now.
7219          * pf = I915_READ(pipe == 0 ? PFA_CTL_1 : PFB_CTL_1) & PF_ENABLE;
7220          */
7221         pf = 0;
7222         pipesrc = I915_READ(PIPESRC(intel_crtc->pipe)) & 0x0fff0fff;
7223         intel_ring_emit(ring, pf | pipesrc);
7224
7225         intel_mark_page_flip_active(intel_crtc);
7226         intel_ring_advance(ring);
7227         return 0;
7228
7229 err_unpin:
7230         intel_unpin_fb_obj(obj);
7231 err:
7232         return ret;
7233 }
7234
7235 static int intel_gen6_queue_flip(struct drm_device *dev,
7236                                  struct drm_crtc *crtc,
7237                                  struct drm_framebuffer *fb,
7238                                  struct drm_i915_gem_object *obj)
7239 {
7240         struct drm_i915_private *dev_priv = dev->dev_private;
7241         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7242         struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
7243         uint32_t pf, pipesrc;
7244         int ret;
7245
7246         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7247         if (ret)
7248                 goto err;
7249
7250         ret = intel_ring_begin(ring, 4);
7251         if (ret)
7252                 goto err_unpin;
7253
7254         intel_ring_emit(ring, MI_DISPLAY_FLIP |
7255                         MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7256         intel_ring_emit(ring, fb->pitches[0] | obj->tiling_mode);
7257         intel_ring_emit(ring, obj->gtt_offset + intel_crtc->dspaddr_offset);
7258
7259         /* Contrary to the suggestions in the documentation,
7260          * "Enable Panel Fitter" does not seem to be required when page
7261          * flipping with a non-native mode, and worse causes a normal
7262          * modeset to fail.
7263          * pf = I915_READ(PF_CTL(intel_crtc->pipe)) & PF_ENABLE;
7264          */
7265         pf = 0;
7266         pipesrc = I915_READ(PIPESRC(intel_crtc->pipe)) & 0x0fff0fff;
7267         intel_ring_emit(ring, pf | pipesrc);
7268
7269         intel_mark_page_flip_active(intel_crtc);
7270         intel_ring_advance(ring);
7271         return 0;
7272
7273 err_unpin:
7274         intel_unpin_fb_obj(obj);
7275 err:
7276         return ret;
7277 }
7278
7279 /*
7280  * On gen7 we currently use the blit ring because (in early silicon at least)
7281  * the render ring doesn't give us interrpts for page flip completion, which
7282  * means clients will hang after the first flip is queued.  Fortunately the
7283  * blit ring generates interrupts properly, so use it instead.
7284  */
7285 static int intel_gen7_queue_flip(struct drm_device *dev,
7286                                  struct drm_crtc *crtc,
7287                                  struct drm_framebuffer *fb,
7288                                  struct drm_i915_gem_object *obj)
7289 {
7290         struct drm_i915_private *dev_priv = dev->dev_private;
7291         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7292         struct intel_ring_buffer *ring = &dev_priv->ring[BCS];
7293         uint32_t plane_bit = 0;
7294         int ret;
7295
7296         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7297         if (ret)
7298                 goto err;
7299
7300         switch(intel_crtc->plane) {
7301         case PLANE_A:
7302                 plane_bit = MI_DISPLAY_FLIP_IVB_PLANE_A;
7303                 break;
7304         case PLANE_B:
7305                 plane_bit = MI_DISPLAY_FLIP_IVB_PLANE_B;
7306                 break;
7307         case PLANE_C:
7308                 plane_bit = MI_DISPLAY_FLIP_IVB_PLANE_C;
7309                 break;
7310         default:
7311                 WARN_ONCE(1, "unknown plane in flip command\n");
7312                 ret = -ENODEV;
7313                 goto err_unpin;
7314         }
7315
7316         ret = intel_ring_begin(ring, 4);
7317         if (ret)
7318                 goto err_unpin;
7319
7320         intel_ring_emit(ring, MI_DISPLAY_FLIP_I915 | plane_bit);
7321         intel_ring_emit(ring, (fb->pitches[0] | obj->tiling_mode));
7322         intel_ring_emit(ring, obj->gtt_offset + intel_crtc->dspaddr_offset);
7323         intel_ring_emit(ring, (MI_NOOP));
7324
7325         intel_mark_page_flip_active(intel_crtc);
7326         intel_ring_advance(ring);
7327         return 0;
7328
7329 err_unpin:
7330         intel_unpin_fb_obj(obj);
7331 err:
7332         return ret;
7333 }
7334
7335 static int intel_default_queue_flip(struct drm_device *dev,
7336                                     struct drm_crtc *crtc,
7337                                     struct drm_framebuffer *fb,
7338                                     struct drm_i915_gem_object *obj)
7339 {
7340         return -ENODEV;
7341 }
7342
7343 static int intel_crtc_page_flip(struct drm_crtc *crtc,
7344                                 struct drm_framebuffer *fb,
7345                                 struct drm_pending_vblank_event *event)
7346 {
7347         struct drm_device *dev = crtc->dev;
7348         struct drm_i915_private *dev_priv = dev->dev_private;
7349         struct drm_framebuffer *old_fb = crtc->fb;
7350         struct drm_i915_gem_object *obj = to_intel_framebuffer(fb)->obj;
7351         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7352         struct intel_unpin_work *work;
7353         unsigned long flags;
7354         int ret;
7355
7356         /* Can't change pixel format via MI display flips. */
7357         if (fb->pixel_format != crtc->fb->pixel_format)
7358                 return -EINVAL;
7359
7360         /*
7361          * TILEOFF/LINOFF registers can't be changed via MI display flips.
7362          * Note that pitch changes could also affect these register.
7363          */
7364         if (INTEL_INFO(dev)->gen > 3 &&
7365             (fb->offsets[0] != crtc->fb->offsets[0] ||
7366              fb->pitches[0] != crtc->fb->pitches[0]))
7367                 return -EINVAL;
7368
7369         work = kzalloc(sizeof *work, GFP_KERNEL);
7370         if (work == NULL)
7371                 return -ENOMEM;
7372
7373         work->event = event;
7374         work->crtc = crtc;
7375         work->old_fb_obj = to_intel_framebuffer(old_fb)->obj;
7376         INIT_WORK(&work->work, intel_unpin_work_fn);
7377
7378         ret = drm_vblank_get(dev, intel_crtc->pipe);
7379         if (ret)
7380                 goto free_work;
7381
7382         /* We borrow the event spin lock for protecting unpin_work */
7383         spin_lock_irqsave(&dev->event_lock, flags);
7384         if (intel_crtc->unpin_work) {
7385                 spin_unlock_irqrestore(&dev->event_lock, flags);
7386                 kfree(work);
7387                 drm_vblank_put(dev, intel_crtc->pipe);
7388
7389                 DRM_DEBUG_DRIVER("flip queue: crtc already busy\n");
7390                 return -EBUSY;
7391         }
7392         intel_crtc->unpin_work = work;
7393         spin_unlock_irqrestore(&dev->event_lock, flags);
7394
7395         if (atomic_read(&intel_crtc->unpin_work_count) >= 2)
7396                 flush_workqueue(dev_priv->wq);
7397
7398         ret = i915_mutex_lock_interruptible(dev);
7399         if (ret)
7400                 goto cleanup;
7401
7402         /* Reference the objects for the scheduled work. */
7403         drm_gem_object_reference(&work->old_fb_obj->base);
7404         drm_gem_object_reference(&obj->base);
7405
7406         crtc->fb = fb;
7407
7408         work->pending_flip_obj = obj;
7409
7410         work->enable_stall_check = true;
7411
7412         atomic_inc(&intel_crtc->unpin_work_count);
7413         intel_crtc->reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
7414
7415         ret = dev_priv->display.queue_flip(dev, crtc, fb, obj);
7416         if (ret)
7417                 goto cleanup_pending;
7418
7419         intel_disable_fbc(dev);
7420         intel_mark_fb_busy(obj);
7421         mutex_unlock(&dev->struct_mutex);
7422
7423         trace_i915_flip_request(intel_crtc->plane, obj);
7424
7425         return 0;
7426
7427 cleanup_pending:
7428         atomic_dec(&intel_crtc->unpin_work_count);
7429         crtc->fb = old_fb;
7430         drm_gem_object_unreference(&work->old_fb_obj->base);
7431         drm_gem_object_unreference(&obj->base);
7432         mutex_unlock(&dev->struct_mutex);
7433
7434 cleanup:
7435         spin_lock_irqsave(&dev->event_lock, flags);
7436         intel_crtc->unpin_work = NULL;
7437         spin_unlock_irqrestore(&dev->event_lock, flags);
7438
7439         drm_vblank_put(dev, intel_crtc->pipe);
7440 free_work:
7441         kfree(work);
7442
7443         return ret;
7444 }
7445
7446 static struct drm_crtc_helper_funcs intel_helper_funcs = {
7447         .mode_set_base_atomic = intel_pipe_set_base_atomic,
7448         .load_lut = intel_crtc_load_lut,
7449 };
7450
7451 bool intel_encoder_check_is_cloned(struct intel_encoder *encoder)
7452 {
7453         struct intel_encoder *other_encoder;
7454         struct drm_crtc *crtc = &encoder->new_crtc->base;
7455
7456         if (WARN_ON(!crtc))
7457                 return false;
7458
7459         list_for_each_entry(other_encoder,
7460                             &crtc->dev->mode_config.encoder_list,
7461                             base.head) {
7462
7463                 if (&other_encoder->new_crtc->base != crtc ||
7464                     encoder == other_encoder)
7465                         continue;
7466                 else
7467                         return true;
7468         }
7469
7470         return false;
7471 }
7472
7473 static bool intel_encoder_crtc_ok(struct drm_encoder *encoder,
7474                                   struct drm_crtc *crtc)
7475 {
7476         struct drm_device *dev;
7477         struct drm_crtc *tmp;
7478         int crtc_mask = 1;
7479
7480         WARN(!crtc, "checking null crtc?\n");
7481
7482         dev = crtc->dev;
7483
7484         list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
7485                 if (tmp == crtc)
7486                         break;
7487                 crtc_mask <<= 1;
7488         }
7489
7490         if (encoder->possible_crtcs & crtc_mask)
7491                 return true;
7492         return false;
7493 }
7494
7495 /**
7496  * intel_modeset_update_staged_output_state
7497  *
7498  * Updates the staged output configuration state, e.g. after we've read out the
7499  * current hw state.
7500  */
7501 static void intel_modeset_update_staged_output_state(struct drm_device *dev)
7502 {
7503         struct intel_encoder *encoder;
7504         struct intel_connector *connector;
7505
7506         list_for_each_entry(connector, &dev->mode_config.connector_list,
7507                             base.head) {
7508                 connector->new_encoder =
7509                         to_intel_encoder(connector->base.encoder);
7510         }
7511
7512         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7513                             base.head) {
7514                 encoder->new_crtc =
7515                         to_intel_crtc(encoder->base.crtc);
7516         }
7517 }
7518
7519 /**
7520  * intel_modeset_commit_output_state
7521  *
7522  * This function copies the stage display pipe configuration to the real one.
7523  */
7524 static void intel_modeset_commit_output_state(struct drm_device *dev)
7525 {
7526         struct intel_encoder *encoder;
7527         struct intel_connector *connector;
7528
7529         list_for_each_entry(connector, &dev->mode_config.connector_list,
7530                             base.head) {
7531                 connector->base.encoder = &connector->new_encoder->base;
7532         }
7533
7534         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7535                             base.head) {
7536                 encoder->base.crtc = &encoder->new_crtc->base;
7537         }
7538 }
7539
7540 static int
7541 pipe_config_set_bpp(struct drm_crtc *crtc,
7542                     struct drm_framebuffer *fb,
7543                     struct intel_crtc_config *pipe_config)
7544 {
7545         struct drm_device *dev = crtc->dev;
7546         struct drm_connector *connector;
7547         int bpp;
7548
7549         switch (fb->pixel_format) {
7550         case DRM_FORMAT_C8:
7551                 bpp = 8*3; /* since we go through a colormap */
7552                 break;
7553         case DRM_FORMAT_XRGB1555:
7554         case DRM_FORMAT_ARGB1555:
7555                 /* checked in intel_framebuffer_init already */
7556                 if (WARN_ON(INTEL_INFO(dev)->gen > 3))
7557                         return -EINVAL;
7558         case DRM_FORMAT_RGB565:
7559                 bpp = 6*3; /* min is 18bpp */
7560                 break;
7561         case DRM_FORMAT_XBGR8888:
7562         case DRM_FORMAT_ABGR8888:
7563                 /* checked in intel_framebuffer_init already */
7564                 if (WARN_ON(INTEL_INFO(dev)->gen < 4))
7565                         return -EINVAL;
7566         case DRM_FORMAT_XRGB8888:
7567         case DRM_FORMAT_ARGB8888:
7568                 bpp = 8*3;
7569                 break;
7570         case DRM_FORMAT_XRGB2101010:
7571         case DRM_FORMAT_ARGB2101010:
7572         case DRM_FORMAT_XBGR2101010:
7573         case DRM_FORMAT_ABGR2101010:
7574                 /* checked in intel_framebuffer_init already */
7575                 if (WARN_ON(INTEL_INFO(dev)->gen < 4))
7576                         return -EINVAL;
7577                 bpp = 10*3;
7578                 break;
7579         /* TODO: gen4+ supports 16 bpc floating point, too. */
7580         default:
7581                 DRM_DEBUG_KMS("unsupported depth\n");
7582                 return -EINVAL;
7583         }
7584
7585         pipe_config->pipe_bpp = bpp;
7586
7587         /* Clamp display bpp to EDID value */
7588         list_for_each_entry(connector, &dev->mode_config.connector_list,
7589                             head) {
7590                 if (connector->encoder && connector->encoder->crtc != crtc)
7591                         continue;
7592
7593                 /* Don't use an invalid EDID bpc value */
7594                 if (connector->display_info.bpc &&
7595                     connector->display_info.bpc * 3 < bpp) {
7596                         DRM_DEBUG_KMS("clamping display bpp (was %d) to EDID reported max of %d\n",
7597                                       bpp, connector->display_info.bpc*3);
7598                         pipe_config->pipe_bpp = connector->display_info.bpc*3;
7599                 }
7600         }
7601
7602         return bpp;
7603 }
7604
7605 static struct intel_crtc_config *
7606 intel_modeset_pipe_config(struct drm_crtc *crtc,
7607                           struct drm_framebuffer *fb,
7608                           struct drm_display_mode *mode)
7609 {
7610         struct drm_device *dev = crtc->dev;
7611         struct drm_encoder_helper_funcs *encoder_funcs;
7612         struct intel_encoder *encoder;
7613         struct intel_crtc_config *pipe_config;
7614         int plane_bpp;
7615
7616         pipe_config = kzalloc(sizeof(*pipe_config), GFP_KERNEL);
7617         if (!pipe_config)
7618                 return ERR_PTR(-ENOMEM);
7619
7620         drm_mode_copy(&pipe_config->adjusted_mode, mode);
7621         drm_mode_copy(&pipe_config->requested_mode, mode);
7622
7623         plane_bpp = pipe_config_set_bpp(crtc, fb, pipe_config);
7624         if (plane_bpp < 0)
7625                 goto fail;
7626
7627         /* Pass our mode to the connectors and the CRTC to give them a chance to
7628          * adjust it according to limitations or connector properties, and also
7629          * a chance to reject the mode entirely.
7630          */
7631         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7632                             base.head) {
7633
7634                 if (&encoder->new_crtc->base != crtc)
7635                         continue;
7636
7637                 if (encoder->compute_config) {
7638                         if (!(encoder->compute_config(encoder, pipe_config))) {
7639                                 DRM_DEBUG_KMS("Encoder config failure\n");
7640                                 goto fail;
7641                         }
7642
7643                         continue;
7644                 }
7645
7646                 encoder_funcs = encoder->base.helper_private;
7647                 if (!(encoder_funcs->mode_fixup(&encoder->base,
7648                                                 &pipe_config->requested_mode,
7649                                                 &pipe_config->adjusted_mode))) {
7650                         DRM_DEBUG_KMS("Encoder fixup failed\n");
7651                         goto fail;
7652                 }
7653         }
7654
7655         if (!(intel_crtc_compute_config(crtc, pipe_config))) {
7656                 DRM_DEBUG_KMS("CRTC fixup failed\n");
7657                 goto fail;
7658         }
7659         DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
7660
7661         pipe_config->dither = pipe_config->pipe_bpp != plane_bpp;
7662         DRM_DEBUG_KMS("plane bpp: %i, pipe bpp: %i, dithering: %i\n",
7663                       plane_bpp, pipe_config->pipe_bpp, pipe_config->dither);
7664
7665         return pipe_config;
7666 fail:
7667         kfree(pipe_config);
7668         return ERR_PTR(-EINVAL);
7669 }
7670
7671 /* Computes which crtcs are affected and sets the relevant bits in the mask. For
7672  * simplicity we use the crtc's pipe number (because it's easier to obtain). */
7673 static void
7674 intel_modeset_affected_pipes(struct drm_crtc *crtc, unsigned *modeset_pipes,
7675                              unsigned *prepare_pipes, unsigned *disable_pipes)
7676 {
7677         struct intel_crtc *intel_crtc;
7678         struct drm_device *dev = crtc->dev;
7679         struct intel_encoder *encoder;
7680         struct intel_connector *connector;
7681         struct drm_crtc *tmp_crtc;
7682
7683         *disable_pipes = *modeset_pipes = *prepare_pipes = 0;
7684
7685         /* Check which crtcs have changed outputs connected to them, these need
7686          * to be part of the prepare_pipes mask. We don't (yet) support global
7687          * modeset across multiple crtcs, so modeset_pipes will only have one
7688          * bit set at most. */
7689         list_for_each_entry(connector, &dev->mode_config.connector_list,
7690                             base.head) {
7691                 if (connector->base.encoder == &connector->new_encoder->base)
7692                         continue;
7693
7694                 if (connector->base.encoder) {
7695                         tmp_crtc = connector->base.encoder->crtc;
7696
7697                         *prepare_pipes |= 1 << to_intel_crtc(tmp_crtc)->pipe;
7698                 }
7699
7700                 if (connector->new_encoder)
7701                         *prepare_pipes |=
7702                                 1 << connector->new_encoder->new_crtc->pipe;
7703         }
7704
7705         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7706                             base.head) {
7707                 if (encoder->base.crtc == &encoder->new_crtc->base)
7708                         continue;
7709
7710                 if (encoder->base.crtc) {
7711                         tmp_crtc = encoder->base.crtc;
7712
7713                         *prepare_pipes |= 1 << to_intel_crtc(tmp_crtc)->pipe;
7714                 }
7715
7716                 if (encoder->new_crtc)
7717                         *prepare_pipes |= 1 << encoder->new_crtc->pipe;
7718         }
7719
7720         /* Check for any pipes that will be fully disabled ... */
7721         list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list,
7722                             base.head) {
7723                 bool used = false;
7724
7725                 /* Don't try to disable disabled crtcs. */
7726                 if (!intel_crtc->base.enabled)
7727                         continue;
7728
7729                 list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7730                                     base.head) {
7731                         if (encoder->new_crtc == intel_crtc)
7732                                 used = true;
7733                 }
7734
7735                 if (!used)
7736                         *disable_pipes |= 1 << intel_crtc->pipe;
7737         }
7738
7739
7740         /* set_mode is also used to update properties on life display pipes. */
7741         intel_crtc = to_intel_crtc(crtc);
7742         if (crtc->enabled)
7743                 *prepare_pipes |= 1 << intel_crtc->pipe;
7744
7745         /*
7746          * For simplicity do a full modeset on any pipe where the output routing
7747          * changed. We could be more clever, but that would require us to be
7748          * more careful with calling the relevant encoder->mode_set functions.
7749          */
7750         if (*prepare_pipes)
7751                 *modeset_pipes = *prepare_pipes;
7752
7753         /* ... and mask these out. */
7754         *modeset_pipes &= ~(*disable_pipes);
7755         *prepare_pipes &= ~(*disable_pipes);
7756
7757         /*
7758          * HACK: We don't (yet) fully support global modesets. intel_set_config
7759          * obies this rule, but the modeset restore mode of
7760          * intel_modeset_setup_hw_state does not.
7761          */
7762         *modeset_pipes &= 1 << intel_crtc->pipe;
7763         *prepare_pipes &= 1 << intel_crtc->pipe;
7764 }
7765
7766 static bool intel_crtc_in_use(struct drm_crtc *crtc)
7767 {
7768         struct drm_encoder *encoder;
7769         struct drm_device *dev = crtc->dev;
7770
7771         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
7772                 if (encoder->crtc == crtc)
7773                         return true;
7774
7775         return false;
7776 }
7777
7778 static void
7779 intel_modeset_update_state(struct drm_device *dev, unsigned prepare_pipes)
7780 {
7781         struct intel_encoder *intel_encoder;
7782         struct intel_crtc *intel_crtc;
7783         struct drm_connector *connector;
7784
7785         list_for_each_entry(intel_encoder, &dev->mode_config.encoder_list,
7786                             base.head) {
7787                 if (!intel_encoder->base.crtc)
7788                         continue;
7789
7790                 intel_crtc = to_intel_crtc(intel_encoder->base.crtc);
7791
7792                 if (prepare_pipes & (1 << intel_crtc->pipe))
7793                         intel_encoder->connectors_active = false;
7794         }
7795
7796         intel_modeset_commit_output_state(dev);
7797
7798         /* Update computed state. */
7799         list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list,
7800                             base.head) {
7801                 intel_crtc->base.enabled = intel_crtc_in_use(&intel_crtc->base);
7802         }
7803
7804         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
7805                 if (!connector->encoder || !connector->encoder->crtc)
7806                         continue;
7807
7808                 intel_crtc = to_intel_crtc(connector->encoder->crtc);
7809
7810                 if (prepare_pipes & (1 << intel_crtc->pipe)) {
7811                         struct drm_property *dpms_property =
7812                                 dev->mode_config.dpms_property;
7813
7814                         connector->dpms = DRM_MODE_DPMS_ON;
7815                         drm_object_property_set_value(&connector->base,
7816                                                          dpms_property,
7817                                                          DRM_MODE_DPMS_ON);
7818
7819                         intel_encoder = to_intel_encoder(connector->encoder);
7820                         intel_encoder->connectors_active = true;
7821                 }
7822         }
7823
7824 }
7825
7826 #define for_each_intel_crtc_masked(dev, mask, intel_crtc) \
7827         list_for_each_entry((intel_crtc), \
7828                             &(dev)->mode_config.crtc_list, \
7829                             base.head) \
7830                 if (mask & (1 <<(intel_crtc)->pipe)) \
7831
7832 static bool
7833 intel_pipe_config_compare(struct intel_crtc_config *current_config,
7834                           struct intel_crtc_config *pipe_config)
7835 {
7836         if (current_config->has_pch_encoder != pipe_config->has_pch_encoder) {
7837                 DRM_ERROR("mismatch in has_pch_encoder "
7838                           "(expected %i, found %i)\n",
7839                           current_config->has_pch_encoder,
7840                           pipe_config->has_pch_encoder);
7841                 return false;
7842         }
7843
7844         return true;
7845 }
7846
7847 void
7848 intel_modeset_check_state(struct drm_device *dev)
7849 {
7850         drm_i915_private_t *dev_priv = dev->dev_private;
7851         struct intel_crtc *crtc;
7852         struct intel_encoder *encoder;
7853         struct intel_connector *connector;
7854         struct intel_crtc_config pipe_config;
7855
7856         list_for_each_entry(connector, &dev->mode_config.connector_list,
7857                             base.head) {
7858                 /* This also checks the encoder/connector hw state with the
7859                  * ->get_hw_state callbacks. */
7860                 intel_connector_check_state(connector);
7861
7862                 WARN(&connector->new_encoder->base != connector->base.encoder,
7863                      "connector's staged encoder doesn't match current encoder\n");
7864         }
7865
7866         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7867                             base.head) {
7868                 bool enabled = false;
7869                 bool active = false;
7870                 enum pipe pipe, tracked_pipe;
7871
7872                 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n",
7873                               encoder->base.base.id,
7874                               drm_get_encoder_name(&encoder->base));
7875
7876                 WARN(&encoder->new_crtc->base != encoder->base.crtc,
7877                      "encoder's stage crtc doesn't match current crtc\n");
7878                 WARN(encoder->connectors_active && !encoder->base.crtc,
7879                      "encoder's active_connectors set, but no crtc\n");
7880
7881                 list_for_each_entry(connector, &dev->mode_config.connector_list,
7882                                     base.head) {
7883                         if (connector->base.encoder != &encoder->base)
7884                                 continue;
7885                         enabled = true;
7886                         if (connector->base.dpms != DRM_MODE_DPMS_OFF)
7887                                 active = true;
7888                 }
7889                 WARN(!!encoder->base.crtc != enabled,
7890                      "encoder's enabled state mismatch "
7891                      "(expected %i, found %i)\n",
7892                      !!encoder->base.crtc, enabled);
7893                 WARN(active && !encoder->base.crtc,
7894                      "active encoder with no crtc\n");
7895
7896                 WARN(encoder->connectors_active != active,
7897                      "encoder's computed active state doesn't match tracked active state "
7898                      "(expected %i, found %i)\n", active, encoder->connectors_active);
7899
7900                 active = encoder->get_hw_state(encoder, &pipe);
7901                 WARN(active != encoder->connectors_active,
7902                      "encoder's hw state doesn't match sw tracking "
7903                      "(expected %i, found %i)\n",
7904                      encoder->connectors_active, active);
7905
7906                 if (!encoder->base.crtc)
7907                         continue;
7908
7909                 tracked_pipe = to_intel_crtc(encoder->base.crtc)->pipe;
7910                 WARN(active && pipe != tracked_pipe,
7911                      "active encoder's pipe doesn't match"
7912                      "(expected %i, found %i)\n",
7913                      tracked_pipe, pipe);
7914
7915         }
7916
7917         list_for_each_entry(crtc, &dev->mode_config.crtc_list,
7918                             base.head) {
7919                 bool enabled = false;
7920                 bool active = false;
7921
7922                 DRM_DEBUG_KMS("[CRTC:%d]\n",
7923                               crtc->base.base.id);
7924
7925                 WARN(crtc->active && !crtc->base.enabled,
7926                      "active crtc, but not enabled in sw tracking\n");
7927
7928                 list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7929                                     base.head) {
7930                         if (encoder->base.crtc != &crtc->base)
7931                                 continue;
7932                         enabled = true;
7933                         if (encoder->connectors_active)
7934                                 active = true;
7935                 }
7936                 WARN(active != crtc->active,
7937                      "crtc's computed active state doesn't match tracked active state "
7938                      "(expected %i, found %i)\n", active, crtc->active);
7939                 WARN(enabled != crtc->base.enabled,
7940                      "crtc's computed enabled state doesn't match tracked enabled state "
7941                      "(expected %i, found %i)\n", enabled, crtc->base.enabled);
7942
7943                 memset(&pipe_config, 0, sizeof(pipe_config));
7944                 active = dev_priv->display.get_pipe_config(crtc,
7945                                                            &pipe_config);
7946
7947                 /* hw state is inconsistent with the pipe A quirk */
7948                 if (crtc->pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE)
7949                         active = crtc->active;
7950
7951                 WARN(crtc->active != active,
7952                      "crtc active state doesn't match with hw state "
7953                      "(expected %i, found %i)\n", crtc->active, active);
7954
7955                 WARN(active &&
7956                      !intel_pipe_config_compare(&crtc->config, &pipe_config),
7957                      "pipe state doesn't match!\n");
7958         }
7959 }
7960
7961 static int __intel_set_mode(struct drm_crtc *crtc,
7962                             struct drm_display_mode *mode,
7963                             int x, int y, struct drm_framebuffer *fb)
7964 {
7965         struct drm_device *dev = crtc->dev;
7966         drm_i915_private_t *dev_priv = dev->dev_private;
7967         struct drm_display_mode *saved_mode, *saved_hwmode;
7968         struct intel_crtc_config *pipe_config = NULL;
7969         struct intel_crtc *intel_crtc;
7970         unsigned disable_pipes, prepare_pipes, modeset_pipes;
7971         int ret = 0;
7972
7973         saved_mode = kmalloc(2 * sizeof(*saved_mode), GFP_KERNEL);
7974         if (!saved_mode)
7975                 return -ENOMEM;
7976         saved_hwmode = saved_mode + 1;
7977
7978         intel_modeset_affected_pipes(crtc, &modeset_pipes,
7979                                      &prepare_pipes, &disable_pipes);
7980
7981         *saved_hwmode = crtc->hwmode;
7982         *saved_mode = crtc->mode;
7983
7984         /* Hack: Because we don't (yet) support global modeset on multiple
7985          * crtcs, we don't keep track of the new mode for more than one crtc.
7986          * Hence simply check whether any bit is set in modeset_pipes in all the
7987          * pieces of code that are not yet converted to deal with mutliple crtcs
7988          * changing their mode at the same time. */
7989         if (modeset_pipes) {
7990                 pipe_config = intel_modeset_pipe_config(crtc, fb, mode);
7991                 if (IS_ERR(pipe_config)) {
7992                         ret = PTR_ERR(pipe_config);
7993                         pipe_config = NULL;
7994
7995                         goto out;
7996                 }
7997         }
7998
7999         DRM_DEBUG_KMS("set mode pipe masks: modeset: %x, prepare: %x, disable: %x\n",
8000                       modeset_pipes, prepare_pipes, disable_pipes);
8001
8002         for_each_intel_crtc_masked(dev, disable_pipes, intel_crtc)
8003                 intel_crtc_disable(&intel_crtc->base);
8004
8005         for_each_intel_crtc_masked(dev, prepare_pipes, intel_crtc) {
8006                 if (intel_crtc->base.enabled)
8007                         dev_priv->display.crtc_disable(&intel_crtc->base);
8008         }
8009
8010         /* crtc->mode is already used by the ->mode_set callbacks, hence we need
8011          * to set it here already despite that we pass it down the callchain.
8012          */
8013         if (modeset_pipes) {
8014                 enum transcoder tmp = to_intel_crtc(crtc)->config.cpu_transcoder;
8015                 crtc->mode = *mode;
8016                 /* mode_set/enable/disable functions rely on a correct pipe
8017                  * config. */
8018                 to_intel_crtc(crtc)->config = *pipe_config;
8019                 to_intel_crtc(crtc)->config.cpu_transcoder = tmp;
8020         }
8021
8022         /* Only after disabling all output pipelines that will be changed can we
8023          * update the the output configuration. */
8024         intel_modeset_update_state(dev, prepare_pipes);
8025
8026         if (dev_priv->display.modeset_global_resources)
8027                 dev_priv->display.modeset_global_resources(dev);
8028
8029         /* Set up the DPLL and any encoders state that needs to adjust or depend
8030          * on the DPLL.
8031          */
8032         for_each_intel_crtc_masked(dev, modeset_pipes, intel_crtc) {
8033                 ret = intel_crtc_mode_set(&intel_crtc->base,
8034                                           x, y, fb);
8035                 if (ret)
8036                         goto done;
8037         }
8038
8039         /* Now enable the clocks, plane, pipe, and connectors that we set up. */
8040         for_each_intel_crtc_masked(dev, prepare_pipes, intel_crtc)
8041                 dev_priv->display.crtc_enable(&intel_crtc->base);
8042
8043         if (modeset_pipes) {
8044                 /* Store real post-adjustment hardware mode. */
8045                 crtc->hwmode = pipe_config->adjusted_mode;
8046
8047                 /* Calculate and store various constants which
8048                  * are later needed by vblank and swap-completion
8049                  * timestamping. They are derived from true hwmode.
8050                  */
8051                 drm_calc_timestamping_constants(crtc);
8052         }
8053
8054         /* FIXME: add subpixel order */
8055 done:
8056         if (ret && crtc->enabled) {
8057                 crtc->hwmode = *saved_hwmode;
8058                 crtc->mode = *saved_mode;
8059         }
8060
8061 out:
8062         kfree(pipe_config);
8063         kfree(saved_mode);
8064         return ret;
8065 }
8066
8067 int intel_set_mode(struct drm_crtc *crtc,
8068                      struct drm_display_mode *mode,
8069                      int x, int y, struct drm_framebuffer *fb)
8070 {
8071         int ret;
8072
8073         ret = __intel_set_mode(crtc, mode, x, y, fb);
8074
8075         if (ret == 0)
8076                 intel_modeset_check_state(crtc->dev);
8077
8078         return ret;
8079 }
8080
8081 void intel_crtc_restore_mode(struct drm_crtc *crtc)
8082 {
8083         intel_set_mode(crtc, &crtc->mode, crtc->x, crtc->y, crtc->fb);
8084 }
8085
8086 #undef for_each_intel_crtc_masked
8087
8088 static void intel_set_config_free(struct intel_set_config *config)
8089 {
8090         if (!config)
8091                 return;
8092
8093         kfree(config->save_connector_encoders);
8094         kfree(config->save_encoder_crtcs);
8095         kfree(config);
8096 }
8097
8098 static int intel_set_config_save_state(struct drm_device *dev,
8099                                        struct intel_set_config *config)
8100 {
8101         struct drm_encoder *encoder;
8102         struct drm_connector *connector;
8103         int count;
8104
8105         config->save_encoder_crtcs =
8106                 kcalloc(dev->mode_config.num_encoder,
8107                         sizeof(struct drm_crtc *), GFP_KERNEL);
8108         if (!config->save_encoder_crtcs)
8109                 return -ENOMEM;
8110
8111         config->save_connector_encoders =
8112                 kcalloc(dev->mode_config.num_connector,
8113                         sizeof(struct drm_encoder *), GFP_KERNEL);
8114         if (!config->save_connector_encoders)
8115                 return -ENOMEM;
8116
8117         /* Copy data. Note that driver private data is not affected.
8118          * Should anything bad happen only the expected state is
8119          * restored, not the drivers personal bookkeeping.
8120          */
8121         count = 0;
8122         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
8123                 config->save_encoder_crtcs[count++] = encoder->crtc;
8124         }
8125
8126         count = 0;
8127         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
8128                 config->save_connector_encoders[count++] = connector->encoder;
8129         }
8130
8131         return 0;
8132 }
8133
8134 static void intel_set_config_restore_state(struct drm_device *dev,
8135                                            struct intel_set_config *config)
8136 {
8137         struct intel_encoder *encoder;
8138         struct intel_connector *connector;
8139         int count;
8140
8141         count = 0;
8142         list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
8143                 encoder->new_crtc =
8144                         to_intel_crtc(config->save_encoder_crtcs[count++]);
8145         }
8146
8147         count = 0;
8148         list_for_each_entry(connector, &dev->mode_config.connector_list, base.head) {
8149                 connector->new_encoder =
8150                         to_intel_encoder(config->save_connector_encoders[count++]);
8151         }
8152 }
8153
8154 static bool
8155 is_crtc_connector_off(struct drm_mode_set *set)
8156 {
8157         int i;
8158
8159         if (set->num_connectors == 0)
8160                 return false;
8161
8162         if (WARN_ON(set->connectors == NULL))
8163                 return false;
8164
8165         for (i = 0; i < set->num_connectors; i++)
8166                 if (set->connectors[i]->encoder &&
8167                     set->connectors[i]->encoder->crtc == set->crtc &&
8168                     set->connectors[i]->dpms != DRM_MODE_DPMS_ON)
8169                         return true;
8170
8171         return false;
8172 }
8173
8174 static void
8175 intel_set_config_compute_mode_changes(struct drm_mode_set *set,
8176                                       struct intel_set_config *config)
8177 {
8178
8179         /* We should be able to check here if the fb has the same properties
8180          * and then just flip_or_move it */
8181         if (is_crtc_connector_off(set)) {
8182                 config->mode_changed = true;
8183         } else if (set->crtc->fb != set->fb) {
8184                 /* If we have no fb then treat it as a full mode set */
8185                 if (set->crtc->fb == NULL) {
8186                         DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
8187                         config->mode_changed = true;
8188                 } else if (set->fb == NULL) {
8189                         config->mode_changed = true;
8190                 } else if (set->fb->pixel_format !=
8191                            set->crtc->fb->pixel_format) {
8192                         config->mode_changed = true;
8193                 } else {
8194                         config->fb_changed = true;
8195                 }
8196         }
8197
8198         if (set->fb && (set->x != set->crtc->x || set->y != set->crtc->y))
8199                 config->fb_changed = true;
8200
8201         if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
8202                 DRM_DEBUG_KMS("modes are different, full mode set\n");
8203                 drm_mode_debug_printmodeline(&set->crtc->mode);
8204                 drm_mode_debug_printmodeline(set->mode);
8205                 config->mode_changed = true;
8206         }
8207 }
8208
8209 static int
8210 intel_modeset_stage_output_state(struct drm_device *dev,
8211                                  struct drm_mode_set *set,
8212                                  struct intel_set_config *config)
8213 {
8214         struct drm_crtc *new_crtc;
8215         struct intel_connector *connector;
8216         struct intel_encoder *encoder;
8217         int count, ro;
8218
8219         /* The upper layers ensure that we either disable a crtc or have a list
8220          * of connectors. For paranoia, double-check this. */
8221         WARN_ON(!set->fb && (set->num_connectors != 0));
8222         WARN_ON(set->fb && (set->num_connectors == 0));
8223
8224         count = 0;
8225         list_for_each_entry(connector, &dev->mode_config.connector_list,
8226                             base.head) {
8227                 /* Otherwise traverse passed in connector list and get encoders
8228                  * for them. */
8229                 for (ro = 0; ro < set->num_connectors; ro++) {
8230                         if (set->connectors[ro] == &connector->base) {
8231                                 connector->new_encoder = connector->encoder;
8232                                 break;
8233                         }
8234                 }
8235
8236                 /* If we disable the crtc, disable all its connectors. Also, if
8237                  * the connector is on the changing crtc but not on the new
8238                  * connector list, disable it. */
8239                 if ((!set->fb || ro == set->num_connectors) &&
8240                     connector->base.encoder &&
8241                     connector->base.encoder->crtc == set->crtc) {
8242                         connector->new_encoder = NULL;
8243
8244                         DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
8245                                 connector->base.base.id,
8246                                 drm_get_connector_name(&connector->base));
8247                 }
8248
8249
8250                 if (&connector->new_encoder->base != connector->base.encoder) {
8251                         DRM_DEBUG_KMS("encoder changed, full mode switch\n");
8252                         config->mode_changed = true;
8253                 }
8254         }
8255         /* connector->new_encoder is now updated for all connectors. */
8256
8257         /* Update crtc of enabled connectors. */
8258         count = 0;
8259         list_for_each_entry(connector, &dev->mode_config.connector_list,
8260                             base.head) {
8261                 if (!connector->new_encoder)
8262                         continue;
8263
8264                 new_crtc = connector->new_encoder->base.crtc;
8265
8266                 for (ro = 0; ro < set->num_connectors; ro++) {
8267                         if (set->connectors[ro] == &connector->base)
8268                                 new_crtc = set->crtc;
8269                 }
8270
8271                 /* Make sure the new CRTC will work with the encoder */
8272                 if (!intel_encoder_crtc_ok(&connector->new_encoder->base,
8273                                            new_crtc)) {
8274                         return -EINVAL;
8275                 }
8276                 connector->encoder->new_crtc = to_intel_crtc(new_crtc);
8277
8278                 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
8279                         connector->base.base.id,
8280                         drm_get_connector_name(&connector->base),
8281                         new_crtc->base.id);
8282         }
8283
8284         /* Check for any encoders that needs to be disabled. */
8285         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
8286                             base.head) {
8287                 list_for_each_entry(connector,
8288                                     &dev->mode_config.connector_list,
8289                                     base.head) {
8290                         if (connector->new_encoder == encoder) {
8291                                 WARN_ON(!connector->new_encoder->new_crtc);
8292
8293                                 goto next_encoder;
8294                         }
8295                 }
8296                 encoder->new_crtc = NULL;
8297 next_encoder:
8298                 /* Only now check for crtc changes so we don't miss encoders
8299                  * that will be disabled. */
8300                 if (&encoder->new_crtc->base != encoder->base.crtc) {
8301                         DRM_DEBUG_KMS("crtc changed, full mode switch\n");
8302                         config->mode_changed = true;
8303                 }
8304         }
8305         /* Now we've also updated encoder->new_crtc for all encoders. */
8306
8307         return 0;
8308 }
8309
8310 static int intel_crtc_set_config(struct drm_mode_set *set)
8311 {
8312         struct drm_device *dev;
8313         struct drm_mode_set save_set;
8314         struct intel_set_config *config;
8315         int ret;
8316
8317         BUG_ON(!set);
8318         BUG_ON(!set->crtc);
8319         BUG_ON(!set->crtc->helper_private);
8320
8321         /* Enforce sane interface api - has been abused by the fb helper. */
8322         BUG_ON(!set->mode && set->fb);
8323         BUG_ON(set->fb && set->num_connectors == 0);
8324
8325         if (set->fb) {
8326                 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
8327                                 set->crtc->base.id, set->fb->base.id,
8328                                 (int)set->num_connectors, set->x, set->y);
8329         } else {
8330                 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
8331         }
8332
8333         dev = set->crtc->dev;
8334
8335         ret = -ENOMEM;
8336         config = kzalloc(sizeof(*config), GFP_KERNEL);
8337         if (!config)
8338                 goto out_config;
8339
8340         ret = intel_set_config_save_state(dev, config);
8341         if (ret)
8342                 goto out_config;
8343
8344         save_set.crtc = set->crtc;
8345         save_set.mode = &set->crtc->mode;
8346         save_set.x = set->crtc->x;
8347         save_set.y = set->crtc->y;
8348         save_set.fb = set->crtc->fb;
8349
8350         /* Compute whether we need a full modeset, only an fb base update or no
8351          * change at all. In the future we might also check whether only the
8352          * mode changed, e.g. for LVDS where we only change the panel fitter in
8353          * such cases. */
8354         intel_set_config_compute_mode_changes(set, config);
8355
8356         ret = intel_modeset_stage_output_state(dev, set, config);
8357         if (ret)
8358                 goto fail;
8359
8360         if (config->mode_changed) {
8361                 if (set->mode) {
8362                         DRM_DEBUG_KMS("attempting to set mode from"
8363                                         " userspace\n");
8364                         drm_mode_debug_printmodeline(set->mode);
8365                 }
8366
8367                 ret = intel_set_mode(set->crtc, set->mode,
8368                                      set->x, set->y, set->fb);
8369         } else if (config->fb_changed) {
8370                 intel_crtc_wait_for_pending_flips(set->crtc);
8371
8372                 ret = intel_pipe_set_base(set->crtc,
8373                                           set->x, set->y, set->fb);
8374         }
8375
8376         if (ret) {
8377                 DRM_ERROR("failed to set mode on [CRTC:%d], err = %d\n",
8378                           set->crtc->base.id, ret);
8379 fail:
8380                 intel_set_config_restore_state(dev, config);
8381
8382                 /* Try to restore the config */
8383                 if (config->mode_changed &&
8384                     intel_set_mode(save_set.crtc, save_set.mode,
8385                                    save_set.x, save_set.y, save_set.fb))
8386                         DRM_ERROR("failed to restore config after modeset failure\n");
8387         }
8388
8389 out_config:
8390         intel_set_config_free(config);
8391         return ret;
8392 }
8393
8394 static const struct drm_crtc_funcs intel_crtc_funcs = {
8395         .cursor_set = intel_crtc_cursor_set,
8396         .cursor_move = intel_crtc_cursor_move,
8397         .gamma_set = intel_crtc_gamma_set,
8398         .set_config = intel_crtc_set_config,
8399         .destroy = intel_crtc_destroy,
8400         .page_flip = intel_crtc_page_flip,
8401 };
8402
8403 static void intel_cpu_pll_init(struct drm_device *dev)
8404 {
8405         if (HAS_DDI(dev))
8406                 intel_ddi_pll_init(dev);
8407 }
8408
8409 static void intel_pch_pll_init(struct drm_device *dev)
8410 {
8411         drm_i915_private_t *dev_priv = dev->dev_private;
8412         int i;
8413
8414         if (dev_priv->num_pch_pll == 0) {
8415                 DRM_DEBUG_KMS("No PCH PLLs on this hardware, skipping initialisation\n");
8416                 return;
8417         }
8418
8419         for (i = 0; i < dev_priv->num_pch_pll; i++) {
8420                 dev_priv->pch_plls[i].pll_reg = _PCH_DPLL(i);
8421                 dev_priv->pch_plls[i].fp0_reg = _PCH_FP0(i);
8422                 dev_priv->pch_plls[i].fp1_reg = _PCH_FP1(i);
8423         }
8424 }
8425
8426 static void intel_crtc_init(struct drm_device *dev, int pipe)
8427 {
8428         drm_i915_private_t *dev_priv = dev->dev_private;
8429         struct intel_crtc *intel_crtc;
8430         int i;
8431
8432         intel_crtc = kzalloc(sizeof(struct intel_crtc) + (INTELFB_CONN_LIMIT * sizeof(struct drm_connector *)), GFP_KERNEL);
8433         if (intel_crtc == NULL)
8434                 return;
8435
8436         drm_crtc_init(dev, &intel_crtc->base, &intel_crtc_funcs);
8437
8438         drm_mode_crtc_set_gamma_size(&intel_crtc->base, 256);
8439         for (i = 0; i < 256; i++) {
8440                 intel_crtc->lut_r[i] = i;
8441                 intel_crtc->lut_g[i] = i;
8442                 intel_crtc->lut_b[i] = i;
8443         }
8444
8445         /* Swap pipes & planes for FBC on pre-965 */
8446         intel_crtc->pipe = pipe;
8447         intel_crtc->plane = pipe;
8448         intel_crtc->config.cpu_transcoder = pipe;
8449         if (IS_MOBILE(dev) && IS_GEN3(dev)) {
8450                 DRM_DEBUG_KMS("swapping pipes & planes for FBC\n");
8451                 intel_crtc->plane = !pipe;
8452         }
8453
8454         BUG_ON(pipe >= ARRAY_SIZE(dev_priv->plane_to_crtc_mapping) ||
8455                dev_priv->plane_to_crtc_mapping[intel_crtc->plane] != NULL);
8456         dev_priv->plane_to_crtc_mapping[intel_crtc->plane] = &intel_crtc->base;
8457         dev_priv->pipe_to_crtc_mapping[intel_crtc->pipe] = &intel_crtc->base;
8458
8459         drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
8460 }
8461
8462 int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
8463                                 struct drm_file *file)
8464 {
8465         struct drm_i915_get_pipe_from_crtc_id *pipe_from_crtc_id = data;
8466         struct drm_mode_object *drmmode_obj;
8467         struct intel_crtc *crtc;
8468
8469         if (!drm_core_check_feature(dev, DRIVER_MODESET))
8470                 return -ENODEV;
8471
8472         drmmode_obj = drm_mode_object_find(dev, pipe_from_crtc_id->crtc_id,
8473                         DRM_MODE_OBJECT_CRTC);
8474
8475         if (!drmmode_obj) {
8476                 DRM_ERROR("no such CRTC id\n");
8477                 return -EINVAL;
8478         }
8479
8480         crtc = to_intel_crtc(obj_to_crtc(drmmode_obj));
8481         pipe_from_crtc_id->pipe = crtc->pipe;
8482
8483         return 0;
8484 }
8485
8486 static int intel_encoder_clones(struct intel_encoder *encoder)
8487 {
8488         struct drm_device *dev = encoder->base.dev;
8489         struct intel_encoder *source_encoder;
8490         int index_mask = 0;
8491         int entry = 0;
8492
8493         list_for_each_entry(source_encoder,
8494                             &dev->mode_config.encoder_list, base.head) {
8495
8496                 if (encoder == source_encoder)
8497                         index_mask |= (1 << entry);
8498
8499                 /* Intel hw has only one MUX where enocoders could be cloned. */
8500                 if (encoder->cloneable && source_encoder->cloneable)
8501                         index_mask |= (1 << entry);
8502
8503                 entry++;
8504         }
8505
8506         return index_mask;
8507 }
8508
8509 static bool has_edp_a(struct drm_device *dev)
8510 {
8511         struct drm_i915_private *dev_priv = dev->dev_private;
8512
8513         if (!IS_MOBILE(dev))
8514                 return false;
8515
8516         if ((I915_READ(DP_A) & DP_DETECTED) == 0)
8517                 return false;
8518
8519         if (IS_GEN5(dev) &&
8520             (I915_READ(ILK_DISPLAY_CHICKEN_FUSES) & ILK_eDP_A_DISABLE))
8521                 return false;
8522
8523         return true;
8524 }
8525
8526 static void intel_setup_outputs(struct drm_device *dev)
8527 {
8528         struct drm_i915_private *dev_priv = dev->dev_private;
8529         struct intel_encoder *encoder;
8530         bool dpd_is_edp = false;
8531         bool has_lvds;
8532
8533         has_lvds = intel_lvds_init(dev);
8534         if (!has_lvds && !HAS_PCH_SPLIT(dev)) {
8535                 /* disable the panel fitter on everything but LVDS */
8536                 I915_WRITE(PFIT_CONTROL, 0);
8537         }
8538
8539         if (!IS_ULT(dev))
8540                 intel_crt_init(dev);
8541
8542         if (HAS_DDI(dev)) {
8543                 int found;
8544
8545                 /* Haswell uses DDI functions to detect digital outputs */
8546                 found = I915_READ(DDI_BUF_CTL_A) & DDI_INIT_DISPLAY_DETECTED;
8547                 /* DDI A only supports eDP */
8548                 if (found)
8549                         intel_ddi_init(dev, PORT_A);
8550
8551                 /* DDI B, C and D detection is indicated by the SFUSE_STRAP
8552                  * register */
8553                 found = I915_READ(SFUSE_STRAP);
8554
8555                 if (found & SFUSE_STRAP_DDIB_DETECTED)
8556                         intel_ddi_init(dev, PORT_B);
8557                 if (found & SFUSE_STRAP_DDIC_DETECTED)
8558                         intel_ddi_init(dev, PORT_C);
8559                 if (found & SFUSE_STRAP_DDID_DETECTED)
8560                         intel_ddi_init(dev, PORT_D);
8561         } else if (HAS_PCH_SPLIT(dev)) {
8562                 int found;
8563                 dpd_is_edp = intel_dpd_is_edp(dev);
8564
8565                 if (has_edp_a(dev))
8566                         intel_dp_init(dev, DP_A, PORT_A);
8567
8568                 if (I915_READ(PCH_HDMIB) & SDVO_DETECTED) {
8569                         /* PCH SDVOB multiplex with HDMIB */
8570                         found = intel_sdvo_init(dev, PCH_SDVOB, true);
8571                         if (!found)
8572                                 intel_hdmi_init(dev, PCH_HDMIB, PORT_B);
8573                         if (!found && (I915_READ(PCH_DP_B) & DP_DETECTED))
8574                                 intel_dp_init(dev, PCH_DP_B, PORT_B);
8575                 }
8576
8577                 if (I915_READ(PCH_HDMIC) & SDVO_DETECTED)
8578                         intel_hdmi_init(dev, PCH_HDMIC, PORT_C);
8579
8580                 if (!dpd_is_edp && I915_READ(PCH_HDMID) & SDVO_DETECTED)
8581                         intel_hdmi_init(dev, PCH_HDMID, PORT_D);
8582
8583                 if (I915_READ(PCH_DP_C) & DP_DETECTED)
8584                         intel_dp_init(dev, PCH_DP_C, PORT_C);
8585
8586                 if (I915_READ(PCH_DP_D) & DP_DETECTED)
8587                         intel_dp_init(dev, PCH_DP_D, PORT_D);
8588         } else if (IS_VALLEYVIEW(dev)) {
8589                 /* Check for built-in panel first. Shares lanes with HDMI on SDVOC */
8590                 if (I915_READ(VLV_DISPLAY_BASE + DP_C) & DP_DETECTED)
8591                         intel_dp_init(dev, VLV_DISPLAY_BASE + DP_C, PORT_C);
8592
8593                 if (I915_READ(VLV_DISPLAY_BASE + GEN4_HDMIB) & SDVO_DETECTED) {
8594                         intel_hdmi_init(dev, VLV_DISPLAY_BASE + GEN4_HDMIB,
8595                                         PORT_B);
8596                         if (I915_READ(VLV_DISPLAY_BASE + DP_B) & DP_DETECTED)
8597                                 intel_dp_init(dev, VLV_DISPLAY_BASE + DP_B, PORT_B);
8598                 }
8599         } else if (SUPPORTS_DIGITAL_OUTPUTS(dev)) {
8600                 bool found = false;
8601
8602                 if (I915_READ(GEN3_SDVOB) & SDVO_DETECTED) {
8603                         DRM_DEBUG_KMS("probing SDVOB\n");
8604                         found = intel_sdvo_init(dev, GEN3_SDVOB, true);
8605                         if (!found && SUPPORTS_INTEGRATED_HDMI(dev)) {
8606                                 DRM_DEBUG_KMS("probing HDMI on SDVOB\n");
8607                                 intel_hdmi_init(dev, GEN4_HDMIB, PORT_B);
8608                         }
8609
8610                         if (!found && SUPPORTS_INTEGRATED_DP(dev)) {
8611                                 DRM_DEBUG_KMS("probing DP_B\n");
8612                                 intel_dp_init(dev, DP_B, PORT_B);
8613                         }
8614                 }
8615
8616                 /* Before G4X SDVOC doesn't have its own detect register */
8617
8618                 if (I915_READ(GEN3_SDVOB) & SDVO_DETECTED) {
8619                         DRM_DEBUG_KMS("probing SDVOC\n");
8620                         found = intel_sdvo_init(dev, GEN3_SDVOC, false);
8621                 }
8622
8623                 if (!found && (I915_READ(GEN3_SDVOC) & SDVO_DETECTED)) {
8624
8625                         if (SUPPORTS_INTEGRATED_HDMI(dev)) {
8626                                 DRM_DEBUG_KMS("probing HDMI on SDVOC\n");
8627                                 intel_hdmi_init(dev, GEN4_HDMIC, PORT_C);
8628                         }
8629                         if (SUPPORTS_INTEGRATED_DP(dev)) {
8630                                 DRM_DEBUG_KMS("probing DP_C\n");
8631                                 intel_dp_init(dev, DP_C, PORT_C);
8632                         }
8633                 }
8634
8635                 if (SUPPORTS_INTEGRATED_DP(dev) &&
8636                     (I915_READ(DP_D) & DP_DETECTED)) {
8637                         DRM_DEBUG_KMS("probing DP_D\n");
8638                         intel_dp_init(dev, DP_D, PORT_D);
8639                 }
8640         } else if (IS_GEN2(dev))
8641                 intel_dvo_init(dev);
8642
8643         if (SUPPORTS_TV(dev))
8644                 intel_tv_init(dev);
8645
8646         list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
8647                 encoder->base.possible_crtcs = encoder->crtc_mask;
8648                 encoder->base.possible_clones =
8649                         intel_encoder_clones(encoder);
8650         }
8651
8652         intel_init_pch_refclk(dev);
8653
8654         drm_helper_move_panel_connectors_to_head(dev);
8655 }
8656
8657 static void intel_user_framebuffer_destroy(struct drm_framebuffer *fb)
8658 {
8659         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
8660
8661         drm_framebuffer_cleanup(fb);
8662         drm_gem_object_unreference_unlocked(&intel_fb->obj->base);
8663
8664         kfree(intel_fb);
8665 }
8666
8667 static int intel_user_framebuffer_create_handle(struct drm_framebuffer *fb,
8668                                                 struct drm_file *file,
8669                                                 unsigned int *handle)
8670 {
8671         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
8672         struct drm_i915_gem_object *obj = intel_fb->obj;
8673
8674         return drm_gem_handle_create(file, &obj->base, handle);
8675 }
8676
8677 static const struct drm_framebuffer_funcs intel_fb_funcs = {
8678         .destroy = intel_user_framebuffer_destroy,
8679         .create_handle = intel_user_framebuffer_create_handle,
8680 };
8681
8682 int intel_framebuffer_init(struct drm_device *dev,
8683                            struct intel_framebuffer *intel_fb,
8684                            struct drm_mode_fb_cmd2 *mode_cmd,
8685                            struct drm_i915_gem_object *obj)
8686 {
8687         int ret;
8688
8689         if (obj->tiling_mode == I915_TILING_Y) {
8690                 DRM_DEBUG("hardware does not support tiling Y\n");
8691                 return -EINVAL;
8692         }
8693
8694         if (mode_cmd->pitches[0] & 63) {
8695                 DRM_DEBUG("pitch (%d) must be at least 64 byte aligned\n",
8696                           mode_cmd->pitches[0]);
8697                 return -EINVAL;
8698         }
8699
8700         /* FIXME <= Gen4 stride limits are bit unclear */
8701         if (mode_cmd->pitches[0] > 32768) {
8702                 DRM_DEBUG("pitch (%d) must be at less than 32768\n",
8703                           mode_cmd->pitches[0]);
8704                 return -EINVAL;
8705         }
8706
8707         if (obj->tiling_mode != I915_TILING_NONE &&
8708             mode_cmd->pitches[0] != obj->stride) {
8709                 DRM_DEBUG("pitch (%d) must match tiling stride (%d)\n",
8710                           mode_cmd->pitches[0], obj->stride);
8711                 return -EINVAL;
8712         }
8713
8714         /* Reject formats not supported by any plane early. */
8715         switch (mode_cmd->pixel_format) {
8716         case DRM_FORMAT_C8:
8717         case DRM_FORMAT_RGB565:
8718         case DRM_FORMAT_XRGB8888:
8719         case DRM_FORMAT_ARGB8888:
8720                 break;
8721         case DRM_FORMAT_XRGB1555:
8722         case DRM_FORMAT_ARGB1555:
8723                 if (INTEL_INFO(dev)->gen > 3) {
8724                         DRM_DEBUG("invalid format: 0x%08x\n", mode_cmd->pixel_format);
8725                         return -EINVAL;
8726                 }
8727                 break;
8728         case DRM_FORMAT_XBGR8888:
8729         case DRM_FORMAT_ABGR8888:
8730         case DRM_FORMAT_XRGB2101010:
8731         case DRM_FORMAT_ARGB2101010:
8732         case DRM_FORMAT_XBGR2101010:
8733         case DRM_FORMAT_ABGR2101010:
8734                 if (INTEL_INFO(dev)->gen < 4) {
8735                         DRM_DEBUG("invalid format: 0x%08x\n", mode_cmd->pixel_format);
8736                         return -EINVAL;
8737                 }
8738                 break;
8739         case DRM_FORMAT_YUYV:
8740         case DRM_FORMAT_UYVY:
8741         case DRM_FORMAT_YVYU:
8742         case DRM_FORMAT_VYUY:
8743                 if (INTEL_INFO(dev)->gen < 5) {
8744                         DRM_DEBUG("invalid format: 0x%08x\n", mode_cmd->pixel_format);
8745                         return -EINVAL;
8746                 }
8747                 break;
8748         default:
8749                 DRM_DEBUG("unsupported pixel format 0x%08x\n", mode_cmd->pixel_format);
8750                 return -EINVAL;
8751         }
8752
8753         /* FIXME need to adjust LINOFF/TILEOFF accordingly. */
8754         if (mode_cmd->offsets[0] != 0)
8755                 return -EINVAL;
8756
8757         drm_helper_mode_fill_fb_struct(&intel_fb->base, mode_cmd);
8758         intel_fb->obj = obj;
8759
8760         ret = drm_framebuffer_init(dev, &intel_fb->base, &intel_fb_funcs);
8761         if (ret) {
8762                 DRM_ERROR("framebuffer init failed %d\n", ret);
8763                 return ret;
8764         }
8765
8766         return 0;
8767 }
8768
8769 static struct drm_framebuffer *
8770 intel_user_framebuffer_create(struct drm_device *dev,
8771                               struct drm_file *filp,
8772                               struct drm_mode_fb_cmd2 *mode_cmd)
8773 {
8774         struct drm_i915_gem_object *obj;
8775
8776         obj = to_intel_bo(drm_gem_object_lookup(dev, filp,
8777                                                 mode_cmd->handles[0]));
8778         if (&obj->base == NULL)
8779                 return ERR_PTR(-ENOENT);
8780
8781         return intel_framebuffer_create(dev, mode_cmd, obj);
8782 }
8783
8784 static const struct drm_mode_config_funcs intel_mode_funcs = {
8785         .fb_create = intel_user_framebuffer_create,
8786         .output_poll_changed = intel_fb_output_poll_changed,
8787 };
8788
8789 /* Set up chip specific display functions */
8790 static void intel_init_display(struct drm_device *dev)
8791 {
8792         struct drm_i915_private *dev_priv = dev->dev_private;
8793
8794         if (HAS_DDI(dev)) {
8795                 dev_priv->display.get_pipe_config = haswell_get_pipe_config;
8796                 dev_priv->display.crtc_mode_set = haswell_crtc_mode_set;
8797                 dev_priv->display.crtc_enable = haswell_crtc_enable;
8798                 dev_priv->display.crtc_disable = haswell_crtc_disable;
8799                 dev_priv->display.off = haswell_crtc_off;
8800                 dev_priv->display.update_plane = ironlake_update_plane;
8801         } else if (HAS_PCH_SPLIT(dev)) {
8802                 dev_priv->display.get_pipe_config = ironlake_get_pipe_config;
8803                 dev_priv->display.crtc_mode_set = ironlake_crtc_mode_set;
8804                 dev_priv->display.crtc_enable = ironlake_crtc_enable;
8805                 dev_priv->display.crtc_disable = ironlake_crtc_disable;
8806                 dev_priv->display.off = ironlake_crtc_off;
8807                 dev_priv->display.update_plane = ironlake_update_plane;
8808         } else {
8809                 dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
8810                 dev_priv->display.crtc_mode_set = i9xx_crtc_mode_set;
8811                 dev_priv->display.crtc_enable = i9xx_crtc_enable;
8812                 dev_priv->display.crtc_disable = i9xx_crtc_disable;
8813                 dev_priv->display.off = i9xx_crtc_off;
8814                 dev_priv->display.update_plane = i9xx_update_plane;
8815         }
8816
8817         /* Returns the core display clock speed */
8818         if (IS_VALLEYVIEW(dev))
8819                 dev_priv->display.get_display_clock_speed =
8820                         valleyview_get_display_clock_speed;
8821         else if (IS_I945G(dev) || (IS_G33(dev) && !IS_PINEVIEW_M(dev)))
8822                 dev_priv->display.get_display_clock_speed =
8823                         i945_get_display_clock_speed;
8824         else if (IS_I915G(dev))
8825                 dev_priv->display.get_display_clock_speed =
8826                         i915_get_display_clock_speed;
8827         else if (IS_I945GM(dev) || IS_845G(dev) || IS_PINEVIEW_M(dev))
8828                 dev_priv->display.get_display_clock_speed =
8829                         i9xx_misc_get_display_clock_speed;
8830         else if (IS_I915GM(dev))
8831                 dev_priv->display.get_display_clock_speed =
8832                         i915gm_get_display_clock_speed;
8833         else if (IS_I865G(dev))
8834                 dev_priv->display.get_display_clock_speed =
8835                         i865_get_display_clock_speed;
8836         else if (IS_I85X(dev))
8837                 dev_priv->display.get_display_clock_speed =
8838                         i855_get_display_clock_speed;
8839         else /* 852, 830 */
8840                 dev_priv->display.get_display_clock_speed =
8841                         i830_get_display_clock_speed;
8842
8843         if (HAS_PCH_SPLIT(dev)) {
8844                 if (IS_GEN5(dev)) {
8845                         dev_priv->display.fdi_link_train = ironlake_fdi_link_train;
8846                         dev_priv->display.write_eld = ironlake_write_eld;
8847                 } else if (IS_GEN6(dev)) {
8848                         dev_priv->display.fdi_link_train = gen6_fdi_link_train;
8849                         dev_priv->display.write_eld = ironlake_write_eld;
8850                 } else if (IS_IVYBRIDGE(dev)) {
8851                         /* FIXME: detect B0+ stepping and use auto training */
8852                         dev_priv->display.fdi_link_train = ivb_manual_fdi_link_train;
8853                         dev_priv->display.write_eld = ironlake_write_eld;
8854                         dev_priv->display.modeset_global_resources =
8855                                 ivb_modeset_global_resources;
8856                 } else if (IS_HASWELL(dev)) {
8857                         dev_priv->display.fdi_link_train = hsw_fdi_link_train;
8858                         dev_priv->display.write_eld = haswell_write_eld;
8859                         dev_priv->display.modeset_global_resources =
8860                                 haswell_modeset_global_resources;
8861                 }
8862         } else if (IS_G4X(dev)) {
8863                 dev_priv->display.write_eld = g4x_write_eld;
8864         }
8865
8866         /* Default just returns -ENODEV to indicate unsupported */
8867         dev_priv->display.queue_flip = intel_default_queue_flip;
8868
8869         switch (INTEL_INFO(dev)->gen) {
8870         case 2:
8871                 dev_priv->display.queue_flip = intel_gen2_queue_flip;
8872                 break;
8873
8874         case 3:
8875                 dev_priv->display.queue_flip = intel_gen3_queue_flip;
8876                 break;
8877
8878         case 4:
8879         case 5:
8880                 dev_priv->display.queue_flip = intel_gen4_queue_flip;
8881                 break;
8882
8883         case 6:
8884                 dev_priv->display.queue_flip = intel_gen6_queue_flip;
8885                 break;
8886         case 7:
8887                 dev_priv->display.queue_flip = intel_gen7_queue_flip;
8888                 break;
8889         }
8890 }
8891
8892 /*
8893  * Some BIOSes insist on assuming the GPU's pipe A is enabled at suspend,
8894  * resume, or other times.  This quirk makes sure that's the case for
8895  * affected systems.
8896  */
8897 static void quirk_pipea_force(struct drm_device *dev)
8898 {
8899         struct drm_i915_private *dev_priv = dev->dev_private;
8900
8901         dev_priv->quirks |= QUIRK_PIPEA_FORCE;
8902         DRM_INFO("applying pipe a force quirk\n");
8903 }
8904
8905 /*
8906  * Some machines (Lenovo U160) do not work with SSC on LVDS for some reason
8907  */
8908 static void quirk_ssc_force_disable(struct drm_device *dev)
8909 {
8910         struct drm_i915_private *dev_priv = dev->dev_private;
8911         dev_priv->quirks |= QUIRK_LVDS_SSC_DISABLE;
8912         DRM_INFO("applying lvds SSC disable quirk\n");
8913 }
8914
8915 /*
8916  * A machine (e.g. Acer Aspire 5734Z) may need to invert the panel backlight
8917  * brightness value
8918  */
8919 static void quirk_invert_brightness(struct drm_device *dev)
8920 {
8921         struct drm_i915_private *dev_priv = dev->dev_private;
8922         dev_priv->quirks |= QUIRK_INVERT_BRIGHTNESS;
8923         DRM_INFO("applying inverted panel brightness quirk\n");
8924 }
8925
8926 /*
8927  * Some machines (Dell XPS13) suffer broken backlight controls if
8928  * BLM_PCH_PWM_ENABLE is set.
8929  */
8930 static void quirk_no_pcm_pwm_enable(struct drm_device *dev)
8931 {
8932         struct drm_i915_private *dev_priv = dev->dev_private;
8933         dev_priv->quirks |= QUIRK_NO_PCH_PWM_ENABLE;
8934         DRM_INFO("applying no-PCH_PWM_ENABLE quirk\n");
8935 }
8936
8937 struct intel_quirk {
8938         int device;
8939         int subsystem_vendor;
8940         int subsystem_device;
8941         void (*hook)(struct drm_device *dev);
8942 };
8943
8944 /* For systems that don't have a meaningful PCI subdevice/subvendor ID */
8945 struct intel_dmi_quirk {
8946         void (*hook)(struct drm_device *dev);
8947         const struct dmi_system_id (*dmi_id_list)[];
8948 };
8949
8950 static int intel_dmi_reverse_brightness(const struct dmi_system_id *id)
8951 {
8952         DRM_INFO("Backlight polarity reversed on %s\n", id->ident);
8953         return 1;
8954 }
8955
8956 static const struct intel_dmi_quirk intel_dmi_quirks[] = {
8957         {
8958                 .dmi_id_list = &(const struct dmi_system_id[]) {
8959                         {
8960                                 .callback = intel_dmi_reverse_brightness,
8961                                 .ident = "NCR Corporation",
8962                                 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "NCR Corporation"),
8963                                             DMI_MATCH(DMI_PRODUCT_NAME, ""),
8964                                 },
8965                         },
8966                         { }  /* terminating entry */
8967                 },
8968                 .hook = quirk_invert_brightness,
8969         },
8970 };
8971
8972 static struct intel_quirk intel_quirks[] = {
8973         /* HP Mini needs pipe A force quirk (LP: #322104) */
8974         { 0x27ae, 0x103c, 0x361a, quirk_pipea_force },
8975
8976         /* Toshiba Protege R-205, S-209 needs pipe A force quirk */
8977         { 0x2592, 0x1179, 0x0001, quirk_pipea_force },
8978
8979         /* ThinkPad T60 needs pipe A force quirk (bug #16494) */
8980         { 0x2782, 0x17aa, 0x201a, quirk_pipea_force },
8981
8982         /* 830/845 need to leave pipe A & dpll A up */
8983         { 0x2562, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
8984         { 0x3577, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
8985
8986         /* Lenovo U160 cannot use SSC on LVDS */
8987         { 0x0046, 0x17aa, 0x3920, quirk_ssc_force_disable },
8988
8989         /* Sony Vaio Y cannot use SSC on LVDS */
8990         { 0x0046, 0x104d, 0x9076, quirk_ssc_force_disable },
8991
8992         /* Acer Aspire 5734Z must invert backlight brightness */
8993         { 0x2a42, 0x1025, 0x0459, quirk_invert_brightness },
8994
8995         /* Acer/eMachines G725 */
8996         { 0x2a42, 0x1025, 0x0210, quirk_invert_brightness },
8997
8998         /* Acer/eMachines e725 */
8999         { 0x2a42, 0x1025, 0x0212, quirk_invert_brightness },
9000
9001         /* Acer/Packard Bell NCL20 */
9002         { 0x2a42, 0x1025, 0x034b, quirk_invert_brightness },
9003
9004         /* Acer Aspire 4736Z */
9005         { 0x2a42, 0x1025, 0x0260, quirk_invert_brightness },
9006
9007         /* Dell XPS13 HD Sandy Bridge */
9008         { 0x0116, 0x1028, 0x052e, quirk_no_pcm_pwm_enable },
9009         /* Dell XPS13 HD and XPS13 FHD Ivy Bridge */
9010         { 0x0166, 0x1028, 0x058b, quirk_no_pcm_pwm_enable },
9011 };
9012
9013 static void intel_init_quirks(struct drm_device *dev)
9014 {
9015         struct pci_dev *d = dev->pdev;
9016         int i;
9017
9018         for (i = 0; i < ARRAY_SIZE(intel_quirks); i++) {
9019                 struct intel_quirk *q = &intel_quirks[i];
9020
9021                 if (d->device == q->device &&
9022                     (d->subsystem_vendor == q->subsystem_vendor ||
9023                      q->subsystem_vendor == PCI_ANY_ID) &&
9024                     (d->subsystem_device == q->subsystem_device ||
9025                      q->subsystem_device == PCI_ANY_ID))
9026                         q->hook(dev);
9027         }
9028         for (i = 0; i < ARRAY_SIZE(intel_dmi_quirks); i++) {
9029                 if (dmi_check_system(*intel_dmi_quirks[i].dmi_id_list) != 0)
9030                         intel_dmi_quirks[i].hook(dev);
9031         }
9032 }
9033
9034 /* Disable the VGA plane that we never use */
9035 static void i915_disable_vga(struct drm_device *dev)
9036 {
9037         struct drm_i915_private *dev_priv = dev->dev_private;
9038         u8 sr1;
9039         u32 vga_reg = i915_vgacntrl_reg(dev);
9040
9041         vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO);
9042         outb(SR01, VGA_SR_INDEX);
9043         sr1 = inb(VGA_SR_DATA);
9044         outb(sr1 | 1<<5, VGA_SR_DATA);
9045         vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
9046         udelay(300);
9047
9048         I915_WRITE(vga_reg, VGA_DISP_DISABLE);
9049         POSTING_READ(vga_reg);
9050 }
9051
9052 void intel_modeset_init_hw(struct drm_device *dev)
9053 {
9054         intel_init_power_well(dev);
9055
9056         intel_prepare_ddi(dev);
9057
9058         intel_init_clock_gating(dev);
9059
9060         mutex_lock(&dev->struct_mutex);
9061         intel_enable_gt_powersave(dev);
9062         mutex_unlock(&dev->struct_mutex);
9063 }
9064
9065 void intel_modeset_init(struct drm_device *dev)
9066 {
9067         struct drm_i915_private *dev_priv = dev->dev_private;
9068         int i, j, ret;
9069
9070         drm_mode_config_init(dev);
9071
9072         dev->mode_config.min_width = 0;
9073         dev->mode_config.min_height = 0;
9074
9075         dev->mode_config.preferred_depth = 24;
9076         dev->mode_config.prefer_shadow = 1;
9077
9078         dev->mode_config.funcs = &intel_mode_funcs;
9079
9080         intel_init_quirks(dev);
9081
9082         intel_init_pm(dev);
9083
9084         if (INTEL_INFO(dev)->num_pipes == 0)
9085                 return;
9086
9087         intel_init_display(dev);
9088
9089         if (IS_GEN2(dev)) {
9090                 dev->mode_config.max_width = 2048;
9091                 dev->mode_config.max_height = 2048;
9092         } else if (IS_GEN3(dev)) {
9093                 dev->mode_config.max_width = 4096;
9094                 dev->mode_config.max_height = 4096;
9095         } else {
9096                 dev->mode_config.max_width = 8192;
9097                 dev->mode_config.max_height = 8192;
9098         }
9099         dev->mode_config.fb_base = dev_priv->gtt.mappable_base;
9100
9101         DRM_DEBUG_KMS("%d display pipe%s available.\n",
9102                       INTEL_INFO(dev)->num_pipes,
9103                       INTEL_INFO(dev)->num_pipes > 1 ? "s" : "");
9104
9105         for (i = 0; i < INTEL_INFO(dev)->num_pipes; i++) {
9106                 intel_crtc_init(dev, i);
9107                 for (j = 0; j < dev_priv->num_plane; j++) {
9108                         ret = intel_plane_init(dev, i, j);
9109                         if (ret)
9110                                 DRM_DEBUG_KMS("pipe %d plane %d init failed: %d\n",
9111                                               i, j, ret);
9112                 }
9113         }
9114
9115         intel_cpu_pll_init(dev);
9116         intel_pch_pll_init(dev);
9117
9118         /* Just disable it once at startup */
9119         i915_disable_vga(dev);
9120         intel_setup_outputs(dev);
9121
9122         /* Just in case the BIOS is doing something questionable. */
9123         intel_disable_fbc(dev);
9124 }
9125
9126 static void
9127 intel_connector_break_all_links(struct intel_connector *connector)
9128 {
9129         connector->base.dpms = DRM_MODE_DPMS_OFF;
9130         connector->base.encoder = NULL;
9131         connector->encoder->connectors_active = false;
9132         connector->encoder->base.crtc = NULL;
9133 }
9134
9135 static void intel_enable_pipe_a(struct drm_device *dev)
9136 {
9137         struct intel_connector *connector;
9138         struct drm_connector *crt = NULL;
9139         struct intel_load_detect_pipe load_detect_temp;
9140
9141         /* We can't just switch on the pipe A, we need to set things up with a
9142          * proper mode and output configuration. As a gross hack, enable pipe A
9143          * by enabling the load detect pipe once. */
9144         list_for_each_entry(connector,
9145                             &dev->mode_config.connector_list,
9146                             base.head) {
9147                 if (connector->encoder->type == INTEL_OUTPUT_ANALOG) {
9148                         crt = &connector->base;
9149                         break;
9150                 }
9151         }
9152
9153         if (!crt)
9154                 return;
9155
9156         if (intel_get_load_detect_pipe(crt, NULL, &load_detect_temp))
9157                 intel_release_load_detect_pipe(crt, &load_detect_temp);
9158
9159
9160 }
9161
9162 static bool
9163 intel_check_plane_mapping(struct intel_crtc *crtc)
9164 {
9165         struct drm_device *dev = crtc->base.dev;
9166         struct drm_i915_private *dev_priv = dev->dev_private;
9167         u32 reg, val;
9168
9169         if (INTEL_INFO(dev)->num_pipes == 1)
9170                 return true;
9171
9172         reg = DSPCNTR(!crtc->plane);
9173         val = I915_READ(reg);
9174
9175         if ((val & DISPLAY_PLANE_ENABLE) &&
9176             (!!(val & DISPPLANE_SEL_PIPE_MASK) == crtc->pipe))
9177                 return false;
9178
9179         return true;
9180 }
9181
9182 static void intel_sanitize_crtc(struct intel_crtc *crtc)
9183 {
9184         struct drm_device *dev = crtc->base.dev;
9185         struct drm_i915_private *dev_priv = dev->dev_private;
9186         u32 reg;
9187
9188         /* Clear any frame start delays used for debugging left by the BIOS */
9189         reg = PIPECONF(crtc->config.cpu_transcoder);
9190         I915_WRITE(reg, I915_READ(reg) & ~PIPECONF_FRAME_START_DELAY_MASK);
9191
9192         /* We need to sanitize the plane -> pipe mapping first because this will
9193          * disable the crtc (and hence change the state) if it is wrong. Note
9194          * that gen4+ has a fixed plane -> pipe mapping.  */
9195         if (INTEL_INFO(dev)->gen < 4 && !intel_check_plane_mapping(crtc)) {
9196                 struct intel_connector *connector;
9197                 bool plane;
9198
9199                 DRM_DEBUG_KMS("[CRTC:%d] wrong plane connection detected!\n",
9200                               crtc->base.base.id);
9201
9202                 /* Pipe has the wrong plane attached and the plane is active.
9203                  * Temporarily change the plane mapping and disable everything
9204                  * ...  */
9205                 plane = crtc->plane;
9206                 crtc->plane = !plane;
9207                 dev_priv->display.crtc_disable(&crtc->base);
9208                 crtc->plane = plane;
9209
9210                 /* ... and break all links. */
9211                 list_for_each_entry(connector, &dev->mode_config.connector_list,
9212                                     base.head) {
9213                         if (connector->encoder->base.crtc != &crtc->base)
9214                                 continue;
9215
9216                         intel_connector_break_all_links(connector);
9217                 }
9218
9219                 WARN_ON(crtc->active);
9220                 crtc->base.enabled = false;
9221         }
9222
9223         if (dev_priv->quirks & QUIRK_PIPEA_FORCE &&
9224             crtc->pipe == PIPE_A && !crtc->active) {
9225                 /* BIOS forgot to enable pipe A, this mostly happens after
9226                  * resume. Force-enable the pipe to fix this, the update_dpms
9227                  * call below we restore the pipe to the right state, but leave
9228                  * the required bits on. */
9229                 intel_enable_pipe_a(dev);
9230         }
9231
9232         /* Adjust the state of the output pipe according to whether we
9233          * have active connectors/encoders. */
9234         intel_crtc_update_dpms(&crtc->base);
9235
9236         if (crtc->active != crtc->base.enabled) {
9237                 struct intel_encoder *encoder;
9238
9239                 /* This can happen either due to bugs in the get_hw_state
9240                  * functions or because the pipe is force-enabled due to the
9241                  * pipe A quirk. */
9242                 DRM_DEBUG_KMS("[CRTC:%d] hw state adjusted, was %s, now %s\n",
9243                               crtc->base.base.id,
9244                               crtc->base.enabled ? "enabled" : "disabled",
9245                               crtc->active ? "enabled" : "disabled");
9246
9247                 crtc->base.enabled = crtc->active;
9248
9249                 /* Because we only establish the connector -> encoder ->
9250                  * crtc links if something is active, this means the
9251                  * crtc is now deactivated. Break the links. connector
9252                  * -> encoder links are only establish when things are
9253                  *  actually up, hence no need to break them. */
9254                 WARN_ON(crtc->active);
9255
9256                 for_each_encoder_on_crtc(dev, &crtc->base, encoder) {
9257                         WARN_ON(encoder->connectors_active);
9258                         encoder->base.crtc = NULL;
9259                 }
9260         }
9261 }
9262
9263 static void intel_sanitize_encoder(struct intel_encoder *encoder)
9264 {
9265         struct intel_connector *connector;
9266         struct drm_device *dev = encoder->base.dev;
9267
9268         /* We need to check both for a crtc link (meaning that the
9269          * encoder is active and trying to read from a pipe) and the
9270          * pipe itself being active. */
9271         bool has_active_crtc = encoder->base.crtc &&
9272                 to_intel_crtc(encoder->base.crtc)->active;
9273
9274         if (encoder->connectors_active && !has_active_crtc) {
9275                 DRM_DEBUG_KMS("[ENCODER:%d:%s] has active connectors but no active pipe!\n",
9276                               encoder->base.base.id,
9277                               drm_get_encoder_name(&encoder->base));
9278
9279                 /* Connector is active, but has no active pipe. This is
9280                  * fallout from our resume register restoring. Disable
9281                  * the encoder manually again. */
9282                 if (encoder->base.crtc) {
9283                         DRM_DEBUG_KMS("[ENCODER:%d:%s] manually disabled\n",
9284                                       encoder->base.base.id,
9285                                       drm_get_encoder_name(&encoder->base));
9286                         encoder->disable(encoder);
9287                 }
9288
9289                 /* Inconsistent output/port/pipe state happens presumably due to
9290                  * a bug in one of the get_hw_state functions. Or someplace else
9291                  * in our code, like the register restore mess on resume. Clamp
9292                  * things to off as a safer default. */
9293                 list_for_each_entry(connector,
9294                                     &dev->mode_config.connector_list,
9295                                     base.head) {
9296                         if (connector->encoder != encoder)
9297                                 continue;
9298
9299                         intel_connector_break_all_links(connector);
9300                 }
9301         }
9302         /* Enabled encoders without active connectors will be fixed in
9303          * the crtc fixup. */
9304 }
9305
9306 void i915_redisable_vga(struct drm_device *dev)
9307 {
9308         struct drm_i915_private *dev_priv = dev->dev_private;
9309         u32 vga_reg = i915_vgacntrl_reg(dev);
9310
9311         if (I915_READ(vga_reg) != VGA_DISP_DISABLE) {
9312                 DRM_DEBUG_KMS("Something enabled VGA plane, disabling it\n");
9313                 i915_disable_vga(dev);
9314         }
9315 }
9316
9317 /* Scan out the current hw modeset state, sanitizes it and maps it into the drm
9318  * and i915 state tracking structures. */
9319 void intel_modeset_setup_hw_state(struct drm_device *dev,
9320                                   bool force_restore)
9321 {
9322         struct drm_i915_private *dev_priv = dev->dev_private;
9323         enum pipe pipe;
9324         u32 tmp;
9325         struct drm_plane *plane;
9326         struct intel_crtc *crtc;
9327         struct intel_encoder *encoder;
9328         struct intel_connector *connector;
9329
9330         if (HAS_DDI(dev)) {
9331                 tmp = I915_READ(TRANS_DDI_FUNC_CTL(TRANSCODER_EDP));
9332
9333                 if (tmp & TRANS_DDI_FUNC_ENABLE) {
9334                         switch (tmp & TRANS_DDI_EDP_INPUT_MASK) {
9335                         case TRANS_DDI_EDP_INPUT_A_ON:
9336                         case TRANS_DDI_EDP_INPUT_A_ONOFF:
9337                                 pipe = PIPE_A;
9338                                 break;
9339                         case TRANS_DDI_EDP_INPUT_B_ONOFF:
9340                                 pipe = PIPE_B;
9341                                 break;
9342                         case TRANS_DDI_EDP_INPUT_C_ONOFF:
9343                                 pipe = PIPE_C;
9344                                 break;
9345                         default:
9346                                 /* A bogus value has been programmed, disable
9347                                  * the transcoder */
9348                                 WARN(1, "Bogus eDP source %08x\n", tmp);
9349                                 intel_ddi_disable_transcoder_func(dev_priv,
9350                                                 TRANSCODER_EDP);
9351                                 goto setup_pipes;
9352                         }
9353
9354                         crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
9355                         crtc->config.cpu_transcoder = TRANSCODER_EDP;
9356
9357                         DRM_DEBUG_KMS("Pipe %c using transcoder EDP\n",
9358                                       pipe_name(pipe));
9359                 }
9360         }
9361
9362 setup_pipes:
9363         list_for_each_entry(crtc, &dev->mode_config.crtc_list,
9364                             base.head) {
9365                 enum transcoder tmp = crtc->config.cpu_transcoder;
9366                 memset(&crtc->config, 0, sizeof(crtc->config));
9367                 crtc->config.cpu_transcoder = tmp;
9368
9369                 crtc->active = dev_priv->display.get_pipe_config(crtc,
9370                                                                  &crtc->config);
9371
9372                 crtc->base.enabled = crtc->active;
9373
9374                 DRM_DEBUG_KMS("[CRTC:%d] hw state readout: %s\n",
9375                               crtc->base.base.id,
9376                               crtc->active ? "enabled" : "disabled");
9377         }
9378
9379         if (HAS_DDI(dev))
9380                 intel_ddi_setup_hw_pll_state(dev);
9381
9382         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
9383                             base.head) {
9384                 pipe = 0;
9385
9386                 if (encoder->get_hw_state(encoder, &pipe)) {
9387                         encoder->base.crtc =
9388                                 dev_priv->pipe_to_crtc_mapping[pipe];
9389                 } else {
9390                         encoder->base.crtc = NULL;
9391                 }
9392
9393                 encoder->connectors_active = false;
9394                 DRM_DEBUG_KMS("[ENCODER:%d:%s] hw state readout: %s, pipe=%i\n",
9395                               encoder->base.base.id,
9396                               drm_get_encoder_name(&encoder->base),
9397                               encoder->base.crtc ? "enabled" : "disabled",
9398                               pipe);
9399         }
9400
9401         list_for_each_entry(connector, &dev->mode_config.connector_list,
9402                             base.head) {
9403                 if (connector->get_hw_state(connector)) {
9404                         connector->base.dpms = DRM_MODE_DPMS_ON;
9405                         connector->encoder->connectors_active = true;
9406                         connector->base.encoder = &connector->encoder->base;
9407                 } else {
9408                         connector->base.dpms = DRM_MODE_DPMS_OFF;
9409                         connector->base.encoder = NULL;
9410                 }
9411                 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] hw state readout: %s\n",
9412                               connector->base.base.id,
9413                               drm_get_connector_name(&connector->base),
9414                               connector->base.encoder ? "enabled" : "disabled");
9415         }
9416
9417         /* HW state is read out, now we need to sanitize this mess. */
9418         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
9419                             base.head) {
9420                 intel_sanitize_encoder(encoder);
9421         }
9422
9423         for_each_pipe(pipe) {
9424                 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
9425                 intel_sanitize_crtc(crtc);
9426         }
9427
9428         if (force_restore) {
9429                 /*
9430                  * We need to use raw interfaces for restoring state to avoid
9431                  * checking (bogus) intermediate states.
9432                  */
9433                 for_each_pipe(pipe) {
9434                         struct drm_crtc *crtc =
9435                                 dev_priv->pipe_to_crtc_mapping[pipe];
9436
9437                         __intel_set_mode(crtc, &crtc->mode, crtc->x, crtc->y,
9438                                          crtc->fb);
9439                 }
9440                 list_for_each_entry(plane, &dev->mode_config.plane_list, head)
9441                         intel_plane_restore(plane);
9442
9443                 i915_redisable_vga(dev);
9444         } else {
9445                 intel_modeset_update_staged_output_state(dev);
9446         }
9447
9448         intel_modeset_check_state(dev);
9449
9450         drm_mode_config_reset(dev);
9451 }
9452
9453 void intel_modeset_gem_init(struct drm_device *dev)
9454 {
9455         intel_modeset_init_hw(dev);
9456
9457         intel_setup_overlay(dev);
9458
9459         mutex_lock(&dev->mode_config.mutex);
9460         intel_modeset_setup_hw_state(dev, false);
9461         mutex_unlock(&dev->mode_config.mutex);
9462 }
9463
9464 void intel_modeset_cleanup(struct drm_device *dev)
9465 {
9466         struct drm_i915_private *dev_priv = dev->dev_private;
9467         struct drm_crtc *crtc;
9468         struct intel_crtc *intel_crtc;
9469
9470         drm_kms_helper_poll_fini(dev);
9471         mutex_lock(&dev->struct_mutex);
9472
9473         intel_unregister_dsm_handler();
9474
9475
9476         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
9477                 /* Skip inactive CRTCs */
9478                 if (!crtc->fb)
9479                         continue;
9480
9481                 intel_crtc = to_intel_crtc(crtc);
9482                 intel_increase_pllclock(crtc);
9483         }
9484
9485         intel_disable_fbc(dev);
9486
9487         intel_disable_gt_powersave(dev);
9488
9489         ironlake_teardown_rc6(dev);
9490
9491         if (IS_VALLEYVIEW(dev))
9492                 vlv_init_dpio(dev);
9493
9494         mutex_unlock(&dev->struct_mutex);
9495
9496         /* Disable the irq before mode object teardown, for the irq might
9497          * enqueue unpin/hotplug work. */
9498         drm_irq_uninstall(dev);
9499         cancel_work_sync(&dev_priv->hotplug_work);
9500         cancel_work_sync(&dev_priv->rps.work);
9501
9502         /* flush any delayed tasks or pending work */
9503         flush_scheduled_work();
9504
9505         /* destroy backlight, if any, before the connectors */
9506         intel_panel_destroy_backlight(dev);
9507
9508         drm_mode_config_cleanup(dev);
9509
9510         intel_cleanup_overlay(dev);
9511 }
9512
9513 /*
9514  * Return which encoder is currently attached for connector.
9515  */
9516 struct drm_encoder *intel_best_encoder(struct drm_connector *connector)
9517 {
9518         return &intel_attached_encoder(connector)->base;
9519 }
9520
9521 void intel_connector_attach_encoder(struct intel_connector *connector,
9522                                     struct intel_encoder *encoder)
9523 {
9524         connector->encoder = encoder;
9525         drm_mode_connector_attach_encoder(&connector->base,
9526                                           &encoder->base);
9527 }
9528
9529 /*
9530  * set vga decode state - true == enable VGA decode
9531  */
9532 int intel_modeset_vga_set_state(struct drm_device *dev, bool state)
9533 {
9534         struct drm_i915_private *dev_priv = dev->dev_private;
9535         unsigned reg = INTEL_INFO(dev)->gen >= 6 ? SNB_GMCH_CTRL : INTEL_GMCH_CTRL;
9536         u16 gmch_ctrl;
9537
9538         pci_read_config_word(dev_priv->bridge_dev, reg, &gmch_ctrl);
9539         if (state)
9540                 gmch_ctrl &= ~INTEL_GMCH_VGA_DISABLE;
9541         else
9542                 gmch_ctrl |= INTEL_GMCH_VGA_DISABLE;
9543         pci_write_config_word(dev_priv->bridge_dev, reg, gmch_ctrl);
9544         return 0;
9545 }
9546
9547 #ifdef CONFIG_DEBUG_FS
9548 #include <linux/seq_file.h>
9549
9550 struct intel_display_error_state {
9551         struct intel_cursor_error_state {
9552                 u32 control;
9553                 u32 position;
9554                 u32 base;
9555                 u32 size;
9556         } cursor[I915_MAX_PIPES];
9557
9558         struct intel_pipe_error_state {
9559                 u32 conf;
9560                 u32 source;
9561
9562                 u32 htotal;
9563                 u32 hblank;
9564                 u32 hsync;
9565                 u32 vtotal;
9566                 u32 vblank;
9567                 u32 vsync;
9568         } pipe[I915_MAX_PIPES];
9569
9570         struct intel_plane_error_state {
9571                 u32 control;
9572                 u32 stride;
9573                 u32 size;
9574                 u32 pos;
9575                 u32 addr;
9576                 u32 surface;
9577                 u32 tile_offset;
9578         } plane[I915_MAX_PIPES];
9579 };
9580
9581 struct intel_display_error_state *
9582 intel_display_capture_error_state(struct drm_device *dev)
9583 {
9584         drm_i915_private_t *dev_priv = dev->dev_private;
9585         struct intel_display_error_state *error;
9586         enum transcoder cpu_transcoder;
9587         int i;
9588
9589         error = kmalloc(sizeof(*error), GFP_ATOMIC);
9590         if (error == NULL)
9591                 return NULL;
9592
9593         for_each_pipe(i) {
9594                 cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv, i);
9595
9596                 if (INTEL_INFO(dev)->gen <= 6 || IS_VALLEYVIEW(dev)) {
9597                         error->cursor[i].control = I915_READ(CURCNTR(i));
9598                         error->cursor[i].position = I915_READ(CURPOS(i));
9599                         error->cursor[i].base = I915_READ(CURBASE(i));
9600                 } else {
9601                         error->cursor[i].control = I915_READ(CURCNTR_IVB(i));
9602                         error->cursor[i].position = I915_READ(CURPOS_IVB(i));
9603                         error->cursor[i].base = I915_READ(CURBASE_IVB(i));
9604                 }
9605
9606                 error->plane[i].control = I915_READ(DSPCNTR(i));
9607                 error->plane[i].stride = I915_READ(DSPSTRIDE(i));
9608                 if (INTEL_INFO(dev)->gen <= 3) {
9609                         error->plane[i].size = I915_READ(DSPSIZE(i));
9610                         error->plane[i].pos = I915_READ(DSPPOS(i));
9611                 }
9612                 if (INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev))
9613                         error->plane[i].addr = I915_READ(DSPADDR(i));
9614                 if (INTEL_INFO(dev)->gen >= 4) {
9615                         error->plane[i].surface = I915_READ(DSPSURF(i));
9616                         error->plane[i].tile_offset = I915_READ(DSPTILEOFF(i));
9617                 }
9618
9619                 error->pipe[i].conf = I915_READ(PIPECONF(cpu_transcoder));
9620                 error->pipe[i].source = I915_READ(PIPESRC(i));
9621                 error->pipe[i].htotal = I915_READ(HTOTAL(cpu_transcoder));
9622                 error->pipe[i].hblank = I915_READ(HBLANK(cpu_transcoder));
9623                 error->pipe[i].hsync = I915_READ(HSYNC(cpu_transcoder));
9624                 error->pipe[i].vtotal = I915_READ(VTOTAL(cpu_transcoder));
9625                 error->pipe[i].vblank = I915_READ(VBLANK(cpu_transcoder));
9626                 error->pipe[i].vsync = I915_READ(VSYNC(cpu_transcoder));
9627         }
9628
9629         return error;
9630 }
9631
9632 void
9633 intel_display_print_error_state(struct seq_file *m,
9634                                 struct drm_device *dev,
9635                                 struct intel_display_error_state *error)
9636 {
9637         int i;
9638
9639         seq_printf(m, "Num Pipes: %d\n", INTEL_INFO(dev)->num_pipes);
9640         for_each_pipe(i) {
9641                 seq_printf(m, "Pipe [%d]:\n", i);
9642                 seq_printf(m, "  CONF: %08x\n", error->pipe[i].conf);
9643                 seq_printf(m, "  SRC: %08x\n", error->pipe[i].source);
9644                 seq_printf(m, "  HTOTAL: %08x\n", error->pipe[i].htotal);
9645                 seq_printf(m, "  HBLANK: %08x\n", error->pipe[i].hblank);
9646                 seq_printf(m, "  HSYNC: %08x\n", error->pipe[i].hsync);
9647                 seq_printf(m, "  VTOTAL: %08x\n", error->pipe[i].vtotal);
9648                 seq_printf(m, "  VBLANK: %08x\n", error->pipe[i].vblank);
9649                 seq_printf(m, "  VSYNC: %08x\n", error->pipe[i].vsync);
9650
9651                 seq_printf(m, "Plane [%d]:\n", i);
9652                 seq_printf(m, "  CNTR: %08x\n", error->plane[i].control);
9653                 seq_printf(m, "  STRIDE: %08x\n", error->plane[i].stride);
9654                 if (INTEL_INFO(dev)->gen <= 3) {
9655                         seq_printf(m, "  SIZE: %08x\n", error->plane[i].size);
9656                         seq_printf(m, "  POS: %08x\n", error->plane[i].pos);
9657                 }
9658                 if (INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev))
9659                         seq_printf(m, "  ADDR: %08x\n", error->plane[i].addr);
9660                 if (INTEL_INFO(dev)->gen >= 4) {
9661                         seq_printf(m, "  SURF: %08x\n", error->plane[i].surface);
9662                         seq_printf(m, "  TILEOFF: %08x\n", error->plane[i].tile_offset);
9663                 }
9664
9665                 seq_printf(m, "Cursor [%d]:\n", i);
9666                 seq_printf(m, "  CNTR: %08x\n", error->cursor[i].control);
9667                 seq_printf(m, "  POS: %08x\n", error->cursor[i].position);
9668                 seq_printf(m, "  BASE: %08x\n", error->cursor[i].base);
9669         }
9670 }
9671 #endif