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->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 (IS_HASWELL(dev_priv->dev) && cpu_transcoder != TRANSCODER_EDP &&
1231             !(I915_READ(HSW_PWR_WELL_DRIVER) & HSW_PWR_WELL_ENABLE)) {
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)) {
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_pch_refclk_enabled(struct drm_i915_private *dev_priv)
1292 {
1293         u32 val;
1294         bool enabled;
1295
1296         if (HAS_PCH_LPT(dev_priv->dev)) {
1297                 DRM_DEBUG_DRIVER("LPT does not has PCH refclk, skipping check\n");
1298                 return;
1299         }
1300
1301         val = I915_READ(PCH_DREF_CONTROL);
1302         enabled = !!(val & (DREF_SSC_SOURCE_MASK | DREF_NONSPREAD_SOURCE_MASK |
1303                             DREF_SUPERSPREAD_SOURCE_MASK));
1304         WARN(!enabled, "PCH refclk assertion failure, should be active but is disabled\n");
1305 }
1306
1307 static void assert_transcoder_disabled(struct drm_i915_private *dev_priv,
1308                                        enum pipe pipe)
1309 {
1310         int reg;
1311         u32 val;
1312         bool enabled;
1313
1314         reg = TRANSCONF(pipe);
1315         val = I915_READ(reg);
1316         enabled = !!(val & TRANS_ENABLE);
1317         WARN(enabled,
1318              "transcoder assertion failed, should be off on pipe %c but is still active\n",
1319              pipe_name(pipe));
1320 }
1321
1322 static bool dp_pipe_enabled(struct drm_i915_private *dev_priv,
1323                             enum pipe pipe, u32 port_sel, u32 val)
1324 {
1325         if ((val & DP_PORT_EN) == 0)
1326                 return false;
1327
1328         if (HAS_PCH_CPT(dev_priv->dev)) {
1329                 u32     trans_dp_ctl_reg = TRANS_DP_CTL(pipe);
1330                 u32     trans_dp_ctl = I915_READ(trans_dp_ctl_reg);
1331                 if ((trans_dp_ctl & TRANS_DP_PORT_SEL_MASK) != port_sel)
1332                         return false;
1333         } else {
1334                 if ((val & DP_PIPE_MASK) != (pipe << 30))
1335                         return false;
1336         }
1337         return true;
1338 }
1339
1340 static bool hdmi_pipe_enabled(struct drm_i915_private *dev_priv,
1341                               enum pipe pipe, u32 val)
1342 {
1343         if ((val & SDVO_ENABLE) == 0)
1344                 return false;
1345
1346         if (HAS_PCH_CPT(dev_priv->dev)) {
1347                 if ((val & SDVO_PIPE_SEL_MASK_CPT) != SDVO_PIPE_SEL_CPT(pipe))
1348                         return false;
1349         } else {
1350                 if ((val & SDVO_PIPE_SEL_MASK) != SDVO_PIPE_SEL(pipe))
1351                         return false;
1352         }
1353         return true;
1354 }
1355
1356 static bool lvds_pipe_enabled(struct drm_i915_private *dev_priv,
1357                               enum pipe pipe, u32 val)
1358 {
1359         if ((val & LVDS_PORT_EN) == 0)
1360                 return false;
1361
1362         if (HAS_PCH_CPT(dev_priv->dev)) {
1363                 if ((val & PORT_TRANS_SEL_MASK) != PORT_TRANS_SEL_CPT(pipe))
1364                         return false;
1365         } else {
1366                 if ((val & LVDS_PIPE_MASK) != LVDS_PIPE(pipe))
1367                         return false;
1368         }
1369         return true;
1370 }
1371
1372 static bool adpa_pipe_enabled(struct drm_i915_private *dev_priv,
1373                               enum pipe pipe, u32 val)
1374 {
1375         if ((val & ADPA_DAC_ENABLE) == 0)
1376                 return false;
1377         if (HAS_PCH_CPT(dev_priv->dev)) {
1378                 if ((val & PORT_TRANS_SEL_MASK) != PORT_TRANS_SEL_CPT(pipe))
1379                         return false;
1380         } else {
1381                 if ((val & ADPA_PIPE_SELECT_MASK) != ADPA_PIPE_SELECT(pipe))
1382                         return false;
1383         }
1384         return true;
1385 }
1386
1387 static void assert_pch_dp_disabled(struct drm_i915_private *dev_priv,
1388                                    enum pipe pipe, int reg, u32 port_sel)
1389 {
1390         u32 val = I915_READ(reg);
1391         WARN(dp_pipe_enabled(dev_priv, pipe, port_sel, val),
1392              "PCH DP (0x%08x) enabled on transcoder %c, should be disabled\n",
1393              reg, pipe_name(pipe));
1394
1395         WARN(HAS_PCH_IBX(dev_priv->dev) && (val & DP_PORT_EN) == 0
1396              && (val & DP_PIPEB_SELECT),
1397              "IBX PCH dp port still using transcoder B\n");
1398 }
1399
1400 static void assert_pch_hdmi_disabled(struct drm_i915_private *dev_priv,
1401                                      enum pipe pipe, int reg)
1402 {
1403         u32 val = I915_READ(reg);
1404         WARN(hdmi_pipe_enabled(dev_priv, pipe, val),
1405              "PCH HDMI (0x%08x) enabled on transcoder %c, should be disabled\n",
1406              reg, pipe_name(pipe));
1407
1408         WARN(HAS_PCH_IBX(dev_priv->dev) && (val & SDVO_ENABLE) == 0
1409              && (val & SDVO_PIPE_B_SELECT),
1410              "IBX PCH hdmi port still using transcoder B\n");
1411 }
1412
1413 static void assert_pch_ports_disabled(struct drm_i915_private *dev_priv,
1414                                       enum pipe pipe)
1415 {
1416         int reg;
1417         u32 val;
1418
1419         assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_B, TRANS_DP_PORT_SEL_B);
1420         assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_C, TRANS_DP_PORT_SEL_C);
1421         assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_D, TRANS_DP_PORT_SEL_D);
1422
1423         reg = PCH_ADPA;
1424         val = I915_READ(reg);
1425         WARN(adpa_pipe_enabled(dev_priv, pipe, val),
1426              "PCH VGA enabled on transcoder %c, should be disabled\n",
1427              pipe_name(pipe));
1428
1429         reg = PCH_LVDS;
1430         val = I915_READ(reg);
1431         WARN(lvds_pipe_enabled(dev_priv, pipe, val),
1432              "PCH LVDS enabled on transcoder %c, should be disabled\n",
1433              pipe_name(pipe));
1434
1435         assert_pch_hdmi_disabled(dev_priv, pipe, PCH_HDMIB);
1436         assert_pch_hdmi_disabled(dev_priv, pipe, PCH_HDMIC);
1437         assert_pch_hdmi_disabled(dev_priv, pipe, PCH_HDMID);
1438 }
1439
1440 /**
1441  * intel_enable_pll - enable a PLL
1442  * @dev_priv: i915 private structure
1443  * @pipe: pipe PLL to enable
1444  *
1445  * Enable @pipe's PLL so we can start pumping pixels from a plane.  Check to
1446  * make sure the PLL reg is writable first though, since the panel write
1447  * protect mechanism may be enabled.
1448  *
1449  * Note!  This is for pre-ILK only.
1450  *
1451  * Unfortunately needed by dvo_ns2501 since the dvo depends on it running.
1452  */
1453 static void intel_enable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
1454 {
1455         int reg;
1456         u32 val;
1457
1458         /* No really, not for ILK+ */
1459         BUG_ON(!IS_VALLEYVIEW(dev_priv->dev) && dev_priv->info->gen >= 5);
1460
1461         /* PLL is protected by panel, make sure we can write it */
1462         if (IS_MOBILE(dev_priv->dev) && !IS_I830(dev_priv->dev))
1463                 assert_panel_unlocked(dev_priv, pipe);
1464
1465         reg = DPLL(pipe);
1466         val = I915_READ(reg);
1467         val |= DPLL_VCO_ENABLE;
1468
1469         /* We do this three times for luck */
1470         I915_WRITE(reg, val);
1471         POSTING_READ(reg);
1472         udelay(150); /* wait for warmup */
1473         I915_WRITE(reg, val);
1474         POSTING_READ(reg);
1475         udelay(150); /* wait for warmup */
1476         I915_WRITE(reg, val);
1477         POSTING_READ(reg);
1478         udelay(150); /* wait for warmup */
1479 }
1480
1481 /**
1482  * intel_disable_pll - disable a PLL
1483  * @dev_priv: i915 private structure
1484  * @pipe: pipe PLL to disable
1485  *
1486  * Disable the PLL for @pipe, making sure the pipe is off first.
1487  *
1488  * Note!  This is for pre-ILK only.
1489  */
1490 static void intel_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
1491 {
1492         int reg;
1493         u32 val;
1494
1495         /* Don't disable pipe A or pipe A PLLs if needed */
1496         if (pipe == PIPE_A && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
1497                 return;
1498
1499         /* Make sure the pipe isn't still relying on us */
1500         assert_pipe_disabled(dev_priv, pipe);
1501
1502         reg = DPLL(pipe);
1503         val = I915_READ(reg);
1504         val &= ~DPLL_VCO_ENABLE;
1505         I915_WRITE(reg, val);
1506         POSTING_READ(reg);
1507 }
1508
1509 /* SBI access */
1510 static void
1511 intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value,
1512                 enum intel_sbi_destination destination)
1513 {
1514         u32 tmp;
1515
1516         WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
1517
1518         if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
1519                                 100)) {
1520                 DRM_ERROR("timeout waiting for SBI to become ready\n");
1521                 return;
1522         }
1523
1524         I915_WRITE(SBI_ADDR, (reg << 16));
1525         I915_WRITE(SBI_DATA, value);
1526
1527         if (destination == SBI_ICLK)
1528                 tmp = SBI_CTL_DEST_ICLK | SBI_CTL_OP_CRWR;
1529         else
1530                 tmp = SBI_CTL_DEST_MPHY | SBI_CTL_OP_IOWR;
1531         I915_WRITE(SBI_CTL_STAT, SBI_BUSY | tmp);
1532
1533         if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
1534                                 100)) {
1535                 DRM_ERROR("timeout waiting for SBI to complete write transaction\n");
1536                 return;
1537         }
1538 }
1539
1540 static u32
1541 intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg,
1542                enum intel_sbi_destination destination)
1543 {
1544         u32 value = 0;
1545         WARN_ON(!mutex_is_locked(&dev_priv->dpio_lock));
1546
1547         if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
1548                                 100)) {
1549                 DRM_ERROR("timeout waiting for SBI to become ready\n");
1550                 return 0;
1551         }
1552
1553         I915_WRITE(SBI_ADDR, (reg << 16));
1554
1555         if (destination == SBI_ICLK)
1556                 value = SBI_CTL_DEST_ICLK | SBI_CTL_OP_CRRD;
1557         else
1558                 value = SBI_CTL_DEST_MPHY | SBI_CTL_OP_IORD;
1559         I915_WRITE(SBI_CTL_STAT, value | SBI_BUSY);
1560
1561         if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
1562                                 100)) {
1563                 DRM_ERROR("timeout waiting for SBI to complete read transaction\n");
1564                 return 0;
1565         }
1566
1567         return I915_READ(SBI_DATA);
1568 }
1569
1570 /**
1571  * ironlake_enable_pch_pll - enable PCH PLL
1572  * @dev_priv: i915 private structure
1573  * @pipe: pipe PLL to enable
1574  *
1575  * The PCH PLL needs to be enabled before the PCH transcoder, since it
1576  * drives the transcoder clock.
1577  */
1578 static void ironlake_enable_pch_pll(struct intel_crtc *intel_crtc)
1579 {
1580         struct drm_i915_private *dev_priv = intel_crtc->base.dev->dev_private;
1581         struct intel_pch_pll *pll;
1582         int reg;
1583         u32 val;
1584
1585         /* PCH PLLs only available on ILK, SNB and IVB */
1586         BUG_ON(dev_priv->info->gen < 5);
1587         pll = intel_crtc->pch_pll;
1588         if (pll == NULL)
1589                 return;
1590
1591         if (WARN_ON(pll->refcount == 0))
1592                 return;
1593
1594         DRM_DEBUG_KMS("enable PCH PLL %x (active %d, on? %d)for crtc %d\n",
1595                       pll->pll_reg, pll->active, pll->on,
1596                       intel_crtc->base.base.id);
1597
1598         /* PCH refclock must be enabled first */
1599         assert_pch_refclk_enabled(dev_priv);
1600
1601         if (pll->active++ && pll->on) {
1602                 assert_pch_pll_enabled(dev_priv, pll, NULL);
1603                 return;
1604         }
1605
1606         DRM_DEBUG_KMS("enabling PCH PLL %x\n", pll->pll_reg);
1607
1608         reg = pll->pll_reg;
1609         val = I915_READ(reg);
1610         val |= DPLL_VCO_ENABLE;
1611         I915_WRITE(reg, val);
1612         POSTING_READ(reg);
1613         udelay(200);
1614
1615         pll->on = true;
1616 }
1617
1618 static void intel_disable_pch_pll(struct intel_crtc *intel_crtc)
1619 {
1620         struct drm_i915_private *dev_priv = intel_crtc->base.dev->dev_private;
1621         struct intel_pch_pll *pll = intel_crtc->pch_pll;
1622         int reg;
1623         u32 val;
1624
1625         /* PCH only available on ILK+ */
1626         BUG_ON(dev_priv->info->gen < 5);
1627         if (pll == NULL)
1628                return;
1629
1630         if (WARN_ON(pll->refcount == 0))
1631                 return;
1632
1633         DRM_DEBUG_KMS("disable PCH PLL %x (active %d, on? %d) for crtc %d\n",
1634                       pll->pll_reg, pll->active, pll->on,
1635                       intel_crtc->base.base.id);
1636
1637         if (WARN_ON(pll->active == 0)) {
1638                 assert_pch_pll_disabled(dev_priv, pll, NULL);
1639                 return;
1640         }
1641
1642         if (--pll->active) {
1643                 assert_pch_pll_enabled(dev_priv, pll, NULL);
1644                 return;
1645         }
1646
1647         DRM_DEBUG_KMS("disabling PCH PLL %x\n", pll->pll_reg);
1648
1649         /* Make sure transcoder isn't still depending on us */
1650         assert_transcoder_disabled(dev_priv, intel_crtc->pipe);
1651
1652         reg = pll->pll_reg;
1653         val = I915_READ(reg);
1654         val &= ~DPLL_VCO_ENABLE;
1655         I915_WRITE(reg, val);
1656         POSTING_READ(reg);
1657         udelay(200);
1658
1659         pll->on = false;
1660 }
1661
1662 static void ironlake_enable_pch_transcoder(struct drm_i915_private *dev_priv,
1663                                            enum pipe pipe)
1664 {
1665         struct drm_device *dev = dev_priv->dev;
1666         struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
1667         uint32_t reg, val, pipeconf_val;
1668
1669         /* PCH only available on ILK+ */
1670         BUG_ON(dev_priv->info->gen < 5);
1671
1672         /* Make sure PCH DPLL is enabled */
1673         assert_pch_pll_enabled(dev_priv,
1674                                to_intel_crtc(crtc)->pch_pll,
1675                                to_intel_crtc(crtc));
1676
1677         /* FDI must be feeding us bits for PCH ports */
1678         assert_fdi_tx_enabled(dev_priv, pipe);
1679         assert_fdi_rx_enabled(dev_priv, pipe);
1680
1681         if (HAS_PCH_CPT(dev)) {
1682                 /* Workaround: Set the timing override bit before enabling the
1683                  * pch transcoder. */
1684                 reg = TRANS_CHICKEN2(pipe);
1685                 val = I915_READ(reg);
1686                 val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
1687                 I915_WRITE(reg, val);
1688         }
1689
1690         reg = TRANSCONF(pipe);
1691         val = I915_READ(reg);
1692         pipeconf_val = I915_READ(PIPECONF(pipe));
1693
1694         if (HAS_PCH_IBX(dev_priv->dev)) {
1695                 /*
1696                  * make the BPC in transcoder be consistent with
1697                  * that in pipeconf reg.
1698                  */
1699                 val &= ~PIPECONF_BPC_MASK;
1700                 val |= pipeconf_val & PIPECONF_BPC_MASK;
1701         }
1702
1703         val &= ~TRANS_INTERLACE_MASK;
1704         if ((pipeconf_val & PIPECONF_INTERLACE_MASK) == PIPECONF_INTERLACED_ILK)
1705                 if (HAS_PCH_IBX(dev_priv->dev) &&
1706                     intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO))
1707                         val |= TRANS_LEGACY_INTERLACED_ILK;
1708                 else
1709                         val |= TRANS_INTERLACED;
1710         else
1711                 val |= TRANS_PROGRESSIVE;
1712
1713         I915_WRITE(reg, val | TRANS_ENABLE);
1714         if (wait_for(I915_READ(reg) & TRANS_STATE_ENABLE, 100))
1715                 DRM_ERROR("failed to enable transcoder %d\n", pipe);
1716 }
1717
1718 static void lpt_enable_pch_transcoder(struct drm_i915_private *dev_priv,
1719                                       enum transcoder cpu_transcoder)
1720 {
1721         u32 val, pipeconf_val;
1722
1723         /* PCH only available on ILK+ */
1724         BUG_ON(dev_priv->info->gen < 5);
1725
1726         /* FDI must be feeding us bits for PCH ports */
1727         assert_fdi_tx_enabled(dev_priv, (enum pipe) cpu_transcoder);
1728         assert_fdi_rx_enabled(dev_priv, TRANSCODER_A);
1729
1730         /* Workaround: set timing override bit. */
1731         val = I915_READ(_TRANSA_CHICKEN2);
1732         val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
1733         I915_WRITE(_TRANSA_CHICKEN2, val);
1734
1735         val = TRANS_ENABLE;
1736         pipeconf_val = I915_READ(PIPECONF(cpu_transcoder));
1737
1738         if ((pipeconf_val & PIPECONF_INTERLACE_MASK_HSW) ==
1739             PIPECONF_INTERLACED_ILK)
1740                 val |= TRANS_INTERLACED;
1741         else
1742                 val |= TRANS_PROGRESSIVE;
1743
1744         I915_WRITE(TRANSCONF(TRANSCODER_A), val);
1745         if (wait_for(I915_READ(_TRANSACONF) & TRANS_STATE_ENABLE, 100))
1746                 DRM_ERROR("Failed to enable PCH transcoder\n");
1747 }
1748
1749 static void ironlake_disable_pch_transcoder(struct drm_i915_private *dev_priv,
1750                                             enum pipe pipe)
1751 {
1752         struct drm_device *dev = dev_priv->dev;
1753         uint32_t reg, val;
1754
1755         /* FDI relies on the transcoder */
1756         assert_fdi_tx_disabled(dev_priv, pipe);
1757         assert_fdi_rx_disabled(dev_priv, pipe);
1758
1759         /* Ports must be off as well */
1760         assert_pch_ports_disabled(dev_priv, pipe);
1761
1762         reg = TRANSCONF(pipe);
1763         val = I915_READ(reg);
1764         val &= ~TRANS_ENABLE;
1765         I915_WRITE(reg, val);
1766         /* wait for PCH transcoder off, transcoder state */
1767         if (wait_for((I915_READ(reg) & TRANS_STATE_ENABLE) == 0, 50))
1768                 DRM_ERROR("failed to disable transcoder %d\n", pipe);
1769
1770         if (!HAS_PCH_IBX(dev)) {
1771                 /* Workaround: Clear the timing override chicken bit again. */
1772                 reg = TRANS_CHICKEN2(pipe);
1773                 val = I915_READ(reg);
1774                 val &= ~TRANS_CHICKEN2_TIMING_OVERRIDE;
1775                 I915_WRITE(reg, val);
1776         }
1777 }
1778
1779 static void lpt_disable_pch_transcoder(struct drm_i915_private *dev_priv)
1780 {
1781         u32 val;
1782
1783         val = I915_READ(_TRANSACONF);
1784         val &= ~TRANS_ENABLE;
1785         I915_WRITE(_TRANSACONF, val);
1786         /* wait for PCH transcoder off, transcoder state */
1787         if (wait_for((I915_READ(_TRANSACONF) & TRANS_STATE_ENABLE) == 0, 50))
1788                 DRM_ERROR("Failed to disable PCH transcoder\n");
1789
1790         /* Workaround: clear timing override bit. */
1791         val = I915_READ(_TRANSA_CHICKEN2);
1792         val &= ~TRANS_CHICKEN2_TIMING_OVERRIDE;
1793         I915_WRITE(_TRANSA_CHICKEN2, val);
1794 }
1795
1796 /**
1797  * intel_enable_pipe - enable a pipe, asserting requirements
1798  * @dev_priv: i915 private structure
1799  * @pipe: pipe to enable
1800  * @pch_port: on ILK+, is this pipe driving a PCH port or not
1801  *
1802  * Enable @pipe, making sure that various hardware specific requirements
1803  * are met, if applicable, e.g. PLL enabled, LVDS pairs enabled, etc.
1804  *
1805  * @pipe should be %PIPE_A or %PIPE_B.
1806  *
1807  * Will wait until the pipe is actually running (i.e. first vblank) before
1808  * returning.
1809  */
1810 static void intel_enable_pipe(struct drm_i915_private *dev_priv, enum pipe pipe,
1811                               bool pch_port)
1812 {
1813         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
1814                                                                       pipe);
1815         enum pipe pch_transcoder;
1816         int reg;
1817         u32 val;
1818
1819         if (HAS_PCH_LPT(dev_priv->dev))
1820                 pch_transcoder = TRANSCODER_A;
1821         else
1822                 pch_transcoder = pipe;
1823
1824         /*
1825          * A pipe without a PLL won't actually be able to drive bits from
1826          * a plane.  On ILK+ the pipe PLLs are integrated, so we don't
1827          * need the check.
1828          */
1829         if (!HAS_PCH_SPLIT(dev_priv->dev))
1830                 assert_pll_enabled(dev_priv, pipe);
1831         else {
1832                 if (pch_port) {
1833                         /* if driving the PCH, we need FDI enabled */
1834                         assert_fdi_rx_pll_enabled(dev_priv, pch_transcoder);
1835                         assert_fdi_tx_pll_enabled(dev_priv,
1836                                                   (enum pipe) cpu_transcoder);
1837                 }
1838                 /* FIXME: assert CPU port conditions for SNB+ */
1839         }
1840
1841         reg = PIPECONF(cpu_transcoder);
1842         val = I915_READ(reg);
1843         if (val & PIPECONF_ENABLE)
1844                 return;
1845
1846         I915_WRITE(reg, val | PIPECONF_ENABLE);
1847         intel_wait_for_vblank(dev_priv->dev, pipe);
1848 }
1849
1850 /**
1851  * intel_disable_pipe - disable a pipe, asserting requirements
1852  * @dev_priv: i915 private structure
1853  * @pipe: pipe to disable
1854  *
1855  * Disable @pipe, making sure that various hardware specific requirements
1856  * are met, if applicable, e.g. plane disabled, panel fitter off, etc.
1857  *
1858  * @pipe should be %PIPE_A or %PIPE_B.
1859  *
1860  * Will wait until the pipe has shut down before returning.
1861  */
1862 static void intel_disable_pipe(struct drm_i915_private *dev_priv,
1863                                enum pipe pipe)
1864 {
1865         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
1866                                                                       pipe);
1867         int reg;
1868         u32 val;
1869
1870         /*
1871          * Make sure planes won't keep trying to pump pixels to us,
1872          * or we might hang the display.
1873          */
1874         assert_planes_disabled(dev_priv, pipe);
1875
1876         /* Don't disable pipe A or pipe A PLLs if needed */
1877         if (pipe == PIPE_A && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
1878                 return;
1879
1880         reg = PIPECONF(cpu_transcoder);
1881         val = I915_READ(reg);
1882         if ((val & PIPECONF_ENABLE) == 0)
1883                 return;
1884
1885         I915_WRITE(reg, val & ~PIPECONF_ENABLE);
1886         intel_wait_for_pipe_off(dev_priv->dev, pipe);
1887 }
1888
1889 /*
1890  * Plane regs are double buffered, going from enabled->disabled needs a
1891  * trigger in order to latch.  The display address reg provides this.
1892  */
1893 void intel_flush_display_plane(struct drm_i915_private *dev_priv,
1894                                       enum plane plane)
1895 {
1896         if (dev_priv->info->gen >= 4)
1897                 I915_WRITE(DSPSURF(plane), I915_READ(DSPSURF(plane)));
1898         else
1899                 I915_WRITE(DSPADDR(plane), I915_READ(DSPADDR(plane)));
1900 }
1901
1902 /**
1903  * intel_enable_plane - enable a display plane on a given pipe
1904  * @dev_priv: i915 private structure
1905  * @plane: plane to enable
1906  * @pipe: pipe being fed
1907  *
1908  * Enable @plane on @pipe, making sure that @pipe is running first.
1909  */
1910 static void intel_enable_plane(struct drm_i915_private *dev_priv,
1911                                enum plane plane, enum pipe pipe)
1912 {
1913         int reg;
1914         u32 val;
1915
1916         /* If the pipe isn't enabled, we can't pump pixels and may hang */
1917         assert_pipe_enabled(dev_priv, pipe);
1918
1919         reg = DSPCNTR(plane);
1920         val = I915_READ(reg);
1921         if (val & DISPLAY_PLANE_ENABLE)
1922                 return;
1923
1924         I915_WRITE(reg, val | DISPLAY_PLANE_ENABLE);
1925         intel_flush_display_plane(dev_priv, plane);
1926         intel_wait_for_vblank(dev_priv->dev, pipe);
1927 }
1928
1929 /**
1930  * intel_disable_plane - disable a display plane
1931  * @dev_priv: i915 private structure
1932  * @plane: plane to disable
1933  * @pipe: pipe consuming the data
1934  *
1935  * Disable @plane; should be an independent operation.
1936  */
1937 static void intel_disable_plane(struct drm_i915_private *dev_priv,
1938                                 enum plane plane, enum pipe pipe)
1939 {
1940         int reg;
1941         u32 val;
1942
1943         reg = DSPCNTR(plane);
1944         val = I915_READ(reg);
1945         if ((val & DISPLAY_PLANE_ENABLE) == 0)
1946                 return;
1947
1948         I915_WRITE(reg, val & ~DISPLAY_PLANE_ENABLE);
1949         intel_flush_display_plane(dev_priv, plane);
1950         intel_wait_for_vblank(dev_priv->dev, pipe);
1951 }
1952
1953 int
1954 intel_pin_and_fence_fb_obj(struct drm_device *dev,
1955                            struct drm_i915_gem_object *obj,
1956                            struct intel_ring_buffer *pipelined)
1957 {
1958         struct drm_i915_private *dev_priv = dev->dev_private;
1959         u32 alignment;
1960         int ret;
1961
1962         switch (obj->tiling_mode) {
1963         case I915_TILING_NONE:
1964                 if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
1965                         alignment = 128 * 1024;
1966                 else if (INTEL_INFO(dev)->gen >= 4)
1967                         alignment = 4 * 1024;
1968                 else
1969                         alignment = 64 * 1024;
1970                 break;
1971         case I915_TILING_X:
1972                 /* pin() will align the object as required by fence */
1973                 alignment = 0;
1974                 break;
1975         case I915_TILING_Y:
1976                 /* FIXME: Is this true? */
1977                 DRM_ERROR("Y tiled not allowed for scan out buffers\n");
1978                 return -EINVAL;
1979         default:
1980                 BUG();
1981         }
1982
1983         dev_priv->mm.interruptible = false;
1984         ret = i915_gem_object_pin_to_display_plane(obj, alignment, pipelined);
1985         if (ret)
1986                 goto err_interruptible;
1987
1988         /* Install a fence for tiled scan-out. Pre-i965 always needs a
1989          * fence, whereas 965+ only requires a fence if using
1990          * framebuffer compression.  For simplicity, we always install
1991          * a fence as the cost is not that onerous.
1992          */
1993         ret = i915_gem_object_get_fence(obj);
1994         if (ret)
1995                 goto err_unpin;
1996
1997         i915_gem_object_pin_fence(obj);
1998
1999         dev_priv->mm.interruptible = true;
2000         return 0;
2001
2002 err_unpin:
2003         i915_gem_object_unpin(obj);
2004 err_interruptible:
2005         dev_priv->mm.interruptible = true;
2006         return ret;
2007 }
2008
2009 void intel_unpin_fb_obj(struct drm_i915_gem_object *obj)
2010 {
2011         i915_gem_object_unpin_fence(obj);
2012         i915_gem_object_unpin(obj);
2013 }
2014
2015 /* Computes the linear offset to the base tile and adjusts x, y. bytes per pixel
2016  * is assumed to be a power-of-two. */
2017 unsigned long intel_gen4_compute_page_offset(int *x, int *y,
2018                                              unsigned int tiling_mode,
2019                                              unsigned int cpp,
2020                                              unsigned int pitch)
2021 {
2022         if (tiling_mode != I915_TILING_NONE) {
2023                 unsigned int tile_rows, tiles;
2024
2025                 tile_rows = *y / 8;
2026                 *y %= 8;
2027
2028                 tiles = *x / (512/cpp);
2029                 *x %= 512/cpp;
2030
2031                 return tile_rows * pitch * 8 + tiles * 4096;
2032         } else {
2033                 unsigned int offset;
2034
2035                 offset = *y * pitch + *x * cpp;
2036                 *y = 0;
2037                 *x = (offset & 4095) / cpp;
2038                 return offset & -4096;
2039         }
2040 }
2041
2042 static int i9xx_update_plane(struct drm_crtc *crtc, struct drm_framebuffer *fb,
2043                              int x, int y)
2044 {
2045         struct drm_device *dev = crtc->dev;
2046         struct drm_i915_private *dev_priv = dev->dev_private;
2047         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2048         struct intel_framebuffer *intel_fb;
2049         struct drm_i915_gem_object *obj;
2050         int plane = intel_crtc->plane;
2051         unsigned long linear_offset;
2052         u32 dspcntr;
2053         u32 reg;
2054
2055         switch (plane) {
2056         case 0:
2057         case 1:
2058                 break;
2059         default:
2060                 DRM_ERROR("Can't update plane %d in SAREA\n", plane);
2061                 return -EINVAL;
2062         }
2063
2064         intel_fb = to_intel_framebuffer(fb);
2065         obj = intel_fb->obj;
2066
2067         reg = DSPCNTR(plane);
2068         dspcntr = I915_READ(reg);
2069         /* Mask out pixel format bits in case we change it */
2070         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
2071         switch (fb->pixel_format) {
2072         case DRM_FORMAT_C8:
2073                 dspcntr |= DISPPLANE_8BPP;
2074                 break;
2075         case DRM_FORMAT_XRGB1555:
2076         case DRM_FORMAT_ARGB1555:
2077                 dspcntr |= DISPPLANE_BGRX555;
2078                 break;
2079         case DRM_FORMAT_RGB565:
2080                 dspcntr |= DISPPLANE_BGRX565;
2081                 break;
2082         case DRM_FORMAT_XRGB8888:
2083         case DRM_FORMAT_ARGB8888:
2084                 dspcntr |= DISPPLANE_BGRX888;
2085                 break;
2086         case DRM_FORMAT_XBGR8888:
2087         case DRM_FORMAT_ABGR8888:
2088                 dspcntr |= DISPPLANE_RGBX888;
2089                 break;
2090         case DRM_FORMAT_XRGB2101010:
2091         case DRM_FORMAT_ARGB2101010:
2092                 dspcntr |= DISPPLANE_BGRX101010;
2093                 break;
2094         case DRM_FORMAT_XBGR2101010:
2095         case DRM_FORMAT_ABGR2101010:
2096                 dspcntr |= DISPPLANE_RGBX101010;
2097                 break;
2098         default:
2099                 DRM_ERROR("Unknown pixel format 0x%08x\n", fb->pixel_format);
2100                 return -EINVAL;
2101         }
2102
2103         if (INTEL_INFO(dev)->gen >= 4) {
2104                 if (obj->tiling_mode != I915_TILING_NONE)
2105                         dspcntr |= DISPPLANE_TILED;
2106                 else
2107                         dspcntr &= ~DISPPLANE_TILED;
2108         }
2109
2110         I915_WRITE(reg, dspcntr);
2111
2112         linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
2113
2114         if (INTEL_INFO(dev)->gen >= 4) {
2115                 intel_crtc->dspaddr_offset =
2116                         intel_gen4_compute_page_offset(&x, &y, obj->tiling_mode,
2117                                                        fb->bits_per_pixel / 8,
2118                                                        fb->pitches[0]);
2119                 linear_offset -= intel_crtc->dspaddr_offset;
2120         } else {
2121                 intel_crtc->dspaddr_offset = linear_offset;
2122         }
2123
2124         DRM_DEBUG_KMS("Writing base %08X %08lX %d %d %d\n",
2125                       obj->gtt_offset, linear_offset, x, y, fb->pitches[0]);
2126         I915_WRITE(DSPSTRIDE(plane), fb->pitches[0]);
2127         if (INTEL_INFO(dev)->gen >= 4) {
2128                 I915_MODIFY_DISPBASE(DSPSURF(plane),
2129                                      obj->gtt_offset + intel_crtc->dspaddr_offset);
2130                 I915_WRITE(DSPTILEOFF(plane), (y << 16) | x);
2131                 I915_WRITE(DSPLINOFF(plane), linear_offset);
2132         } else
2133                 I915_WRITE(DSPADDR(plane), obj->gtt_offset + linear_offset);
2134         POSTING_READ(reg);
2135
2136         return 0;
2137 }
2138
2139 static int ironlake_update_plane(struct drm_crtc *crtc,
2140                                  struct drm_framebuffer *fb, int x, int y)
2141 {
2142         struct drm_device *dev = crtc->dev;
2143         struct drm_i915_private *dev_priv = dev->dev_private;
2144         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2145         struct intel_framebuffer *intel_fb;
2146         struct drm_i915_gem_object *obj;
2147         int plane = intel_crtc->plane;
2148         unsigned long linear_offset;
2149         u32 dspcntr;
2150         u32 reg;
2151
2152         switch (plane) {
2153         case 0:
2154         case 1:
2155         case 2:
2156                 break;
2157         default:
2158                 DRM_ERROR("Can't update plane %d in SAREA\n", plane);
2159                 return -EINVAL;
2160         }
2161
2162         intel_fb = to_intel_framebuffer(fb);
2163         obj = intel_fb->obj;
2164
2165         reg = DSPCNTR(plane);
2166         dspcntr = I915_READ(reg);
2167         /* Mask out pixel format bits in case we change it */
2168         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
2169         switch (fb->pixel_format) {
2170         case DRM_FORMAT_C8:
2171                 dspcntr |= DISPPLANE_8BPP;
2172                 break;
2173         case DRM_FORMAT_RGB565:
2174                 dspcntr |= DISPPLANE_BGRX565;
2175                 break;
2176         case DRM_FORMAT_XRGB8888:
2177         case DRM_FORMAT_ARGB8888:
2178                 dspcntr |= DISPPLANE_BGRX888;
2179                 break;
2180         case DRM_FORMAT_XBGR8888:
2181         case DRM_FORMAT_ABGR8888:
2182                 dspcntr |= DISPPLANE_RGBX888;
2183                 break;
2184         case DRM_FORMAT_XRGB2101010:
2185         case DRM_FORMAT_ARGB2101010:
2186                 dspcntr |= DISPPLANE_BGRX101010;
2187                 break;
2188         case DRM_FORMAT_XBGR2101010:
2189         case DRM_FORMAT_ABGR2101010:
2190                 dspcntr |= DISPPLANE_RGBX101010;
2191                 break;
2192         default:
2193                 DRM_ERROR("Unknown pixel format 0x%08x\n", fb->pixel_format);
2194                 return -EINVAL;
2195         }
2196
2197         if (obj->tiling_mode != I915_TILING_NONE)
2198                 dspcntr |= DISPPLANE_TILED;
2199         else
2200                 dspcntr &= ~DISPPLANE_TILED;
2201
2202         /* must disable */
2203         dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
2204
2205         I915_WRITE(reg, dspcntr);
2206
2207         linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
2208         intel_crtc->dspaddr_offset =
2209                 intel_gen4_compute_page_offset(&x, &y, obj->tiling_mode,
2210                                                fb->bits_per_pixel / 8,
2211                                                fb->pitches[0]);
2212         linear_offset -= intel_crtc->dspaddr_offset;
2213
2214         DRM_DEBUG_KMS("Writing base %08X %08lX %d %d %d\n",
2215                       obj->gtt_offset, linear_offset, x, y, fb->pitches[0]);
2216         I915_WRITE(DSPSTRIDE(plane), fb->pitches[0]);
2217         I915_MODIFY_DISPBASE(DSPSURF(plane),
2218                              obj->gtt_offset + intel_crtc->dspaddr_offset);
2219         if (IS_HASWELL(dev)) {
2220                 I915_WRITE(DSPOFFSET(plane), (y << 16) | x);
2221         } else {
2222                 I915_WRITE(DSPTILEOFF(plane), (y << 16) | x);
2223                 I915_WRITE(DSPLINOFF(plane), linear_offset);
2224         }
2225         POSTING_READ(reg);
2226
2227         return 0;
2228 }
2229
2230 /* Assume fb object is pinned & idle & fenced and just update base pointers */
2231 static int
2232 intel_pipe_set_base_atomic(struct drm_crtc *crtc, struct drm_framebuffer *fb,
2233                            int x, int y, enum mode_set_atomic state)
2234 {
2235         struct drm_device *dev = crtc->dev;
2236         struct drm_i915_private *dev_priv = dev->dev_private;
2237
2238         if (dev_priv->display.disable_fbc)
2239                 dev_priv->display.disable_fbc(dev);
2240         intel_increase_pllclock(crtc);
2241
2242         return dev_priv->display.update_plane(crtc, fb, x, y);
2243 }
2244
2245 void intel_display_handle_reset(struct drm_device *dev)
2246 {
2247         struct drm_i915_private *dev_priv = dev->dev_private;
2248         struct drm_crtc *crtc;
2249
2250         /*
2251          * Flips in the rings have been nuked by the reset,
2252          * so complete all pending flips so that user space
2253          * will get its events and not get stuck.
2254          *
2255          * Also update the base address of all primary
2256          * planes to the the last fb to make sure we're
2257          * showing the correct fb after a reset.
2258          *
2259          * Need to make two loops over the crtcs so that we
2260          * don't try to grab a crtc mutex before the
2261          * pending_flip_queue really got woken up.
2262          */
2263
2264         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
2265                 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2266                 enum plane plane = intel_crtc->plane;
2267
2268                 intel_prepare_page_flip(dev, plane);
2269                 intel_finish_page_flip_plane(dev, plane);
2270         }
2271
2272         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
2273                 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2274
2275                 mutex_lock(&crtc->mutex);
2276                 if (intel_crtc->active)
2277                         dev_priv->display.update_plane(crtc, crtc->fb,
2278                                                        crtc->x, crtc->y);
2279                 mutex_unlock(&crtc->mutex);
2280         }
2281 }
2282
2283 static int
2284 intel_finish_fb(struct drm_framebuffer *old_fb)
2285 {
2286         struct drm_i915_gem_object *obj = to_intel_framebuffer(old_fb)->obj;
2287         struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
2288         bool was_interruptible = dev_priv->mm.interruptible;
2289         int ret;
2290
2291         /* Big Hammer, we also need to ensure that any pending
2292          * MI_WAIT_FOR_EVENT inside a user batch buffer on the
2293          * current scanout is retired before unpinning the old
2294          * framebuffer.
2295          *
2296          * This should only fail upon a hung GPU, in which case we
2297          * can safely continue.
2298          */
2299         dev_priv->mm.interruptible = false;
2300         ret = i915_gem_object_finish_gpu(obj);
2301         dev_priv->mm.interruptible = was_interruptible;
2302
2303         return ret;
2304 }
2305
2306 static void intel_crtc_update_sarea_pos(struct drm_crtc *crtc, int x, int y)
2307 {
2308         struct drm_device *dev = crtc->dev;
2309         struct drm_i915_master_private *master_priv;
2310         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2311
2312         if (!dev->primary->master)
2313                 return;
2314
2315         master_priv = dev->primary->master->driver_priv;
2316         if (!master_priv->sarea_priv)
2317                 return;
2318
2319         switch (intel_crtc->pipe) {
2320         case 0:
2321                 master_priv->sarea_priv->pipeA_x = x;
2322                 master_priv->sarea_priv->pipeA_y = y;
2323                 break;
2324         case 1:
2325                 master_priv->sarea_priv->pipeB_x = x;
2326                 master_priv->sarea_priv->pipeB_y = y;
2327                 break;
2328         default:
2329                 break;
2330         }
2331 }
2332
2333 static int
2334 intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
2335                     struct drm_framebuffer *fb)
2336 {
2337         struct drm_device *dev = crtc->dev;
2338         struct drm_i915_private *dev_priv = dev->dev_private;
2339         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2340         struct drm_framebuffer *old_fb;
2341         int ret;
2342
2343         /* no fb bound */
2344         if (!fb) {
2345                 DRM_ERROR("No FB bound\n");
2346                 return 0;
2347         }
2348
2349         if(intel_crtc->plane > dev_priv->num_pipe) {
2350                 DRM_ERROR("no plane for crtc: plane %d, num_pipes %d\n",
2351                                 intel_crtc->plane,
2352                                 dev_priv->num_pipe);
2353                 return -EINVAL;
2354         }
2355
2356         mutex_lock(&dev->struct_mutex);
2357         ret = intel_pin_and_fence_fb_obj(dev,
2358                                          to_intel_framebuffer(fb)->obj,
2359                                          NULL);
2360         if (ret != 0) {
2361                 mutex_unlock(&dev->struct_mutex);
2362                 DRM_ERROR("pin & fence failed\n");
2363                 return ret;
2364         }
2365
2366         ret = dev_priv->display.update_plane(crtc, fb, x, y);
2367         if (ret) {
2368                 intel_unpin_fb_obj(to_intel_framebuffer(fb)->obj);
2369                 mutex_unlock(&dev->struct_mutex);
2370                 DRM_ERROR("failed to update base address\n");
2371                 return ret;
2372         }
2373
2374         old_fb = crtc->fb;
2375         crtc->fb = fb;
2376         crtc->x = x;
2377         crtc->y = y;
2378
2379         if (old_fb) {
2380                 intel_wait_for_vblank(dev, intel_crtc->pipe);
2381                 intel_unpin_fb_obj(to_intel_framebuffer(old_fb)->obj);
2382         }
2383
2384         intel_update_fbc(dev);
2385         mutex_unlock(&dev->struct_mutex);
2386
2387         intel_crtc_update_sarea_pos(crtc, x, y);
2388
2389         return 0;
2390 }
2391
2392 static void intel_fdi_normal_train(struct drm_crtc *crtc)
2393 {
2394         struct drm_device *dev = crtc->dev;
2395         struct drm_i915_private *dev_priv = dev->dev_private;
2396         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2397         int pipe = intel_crtc->pipe;
2398         u32 reg, temp;
2399
2400         /* enable normal train */
2401         reg = FDI_TX_CTL(pipe);
2402         temp = I915_READ(reg);
2403         if (IS_IVYBRIDGE(dev)) {
2404                 temp &= ~FDI_LINK_TRAIN_NONE_IVB;
2405                 temp |= FDI_LINK_TRAIN_NONE_IVB | FDI_TX_ENHANCE_FRAME_ENABLE;
2406         } else {
2407                 temp &= ~FDI_LINK_TRAIN_NONE;
2408                 temp |= FDI_LINK_TRAIN_NONE | FDI_TX_ENHANCE_FRAME_ENABLE;
2409         }
2410         I915_WRITE(reg, temp);
2411
2412         reg = FDI_RX_CTL(pipe);
2413         temp = I915_READ(reg);
2414         if (HAS_PCH_CPT(dev)) {
2415                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2416                 temp |= FDI_LINK_TRAIN_NORMAL_CPT;
2417         } else {
2418                 temp &= ~FDI_LINK_TRAIN_NONE;
2419                 temp |= FDI_LINK_TRAIN_NONE;
2420         }
2421         I915_WRITE(reg, temp | FDI_RX_ENHANCE_FRAME_ENABLE);
2422
2423         /* wait one idle pattern time */
2424         POSTING_READ(reg);
2425         udelay(1000);
2426
2427         /* IVB wants error correction enabled */
2428         if (IS_IVYBRIDGE(dev))
2429                 I915_WRITE(reg, I915_READ(reg) | FDI_FS_ERRC_ENABLE |
2430                            FDI_FE_ERRC_ENABLE);
2431 }
2432
2433 static void ivb_modeset_global_resources(struct drm_device *dev)
2434 {
2435         struct drm_i915_private *dev_priv = dev->dev_private;
2436         struct intel_crtc *pipe_B_crtc =
2437                 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[PIPE_B]);
2438         struct intel_crtc *pipe_C_crtc =
2439                 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[PIPE_C]);
2440         uint32_t temp;
2441
2442         /* When everything is off disable fdi C so that we could enable fdi B
2443          * with all lanes. XXX: This misses the case where a pipe is not using
2444          * any pch resources and so doesn't need any fdi lanes. */
2445         if (!pipe_B_crtc->base.enabled && !pipe_C_crtc->base.enabled) {
2446                 WARN_ON(I915_READ(FDI_RX_CTL(PIPE_B)) & FDI_RX_ENABLE);
2447                 WARN_ON(I915_READ(FDI_RX_CTL(PIPE_C)) & FDI_RX_ENABLE);
2448
2449                 temp = I915_READ(SOUTH_CHICKEN1);
2450                 temp &= ~FDI_BC_BIFURCATION_SELECT;
2451                 DRM_DEBUG_KMS("disabling fdi C rx\n");
2452                 I915_WRITE(SOUTH_CHICKEN1, temp);
2453         }
2454 }
2455
2456 /* The FDI link training functions for ILK/Ibexpeak. */
2457 static void ironlake_fdi_link_train(struct drm_crtc *crtc)
2458 {
2459         struct drm_device *dev = crtc->dev;
2460         struct drm_i915_private *dev_priv = dev->dev_private;
2461         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2462         int pipe = intel_crtc->pipe;
2463         int plane = intel_crtc->plane;
2464         u32 reg, temp, tries;
2465
2466         /* FDI needs bits from pipe & plane first */
2467         assert_pipe_enabled(dev_priv, pipe);
2468         assert_plane_enabled(dev_priv, plane);
2469
2470         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2471            for train result */
2472         reg = FDI_RX_IMR(pipe);
2473         temp = I915_READ(reg);
2474         temp &= ~FDI_RX_SYMBOL_LOCK;
2475         temp &= ~FDI_RX_BIT_LOCK;
2476         I915_WRITE(reg, temp);
2477         I915_READ(reg);
2478         udelay(150);
2479
2480         /* enable CPU FDI TX and PCH FDI RX */
2481         reg = FDI_TX_CTL(pipe);
2482         temp = I915_READ(reg);
2483         temp &= ~(7 << 19);
2484         temp |= (intel_crtc->fdi_lanes - 1) << 19;
2485         temp &= ~FDI_LINK_TRAIN_NONE;
2486         temp |= FDI_LINK_TRAIN_PATTERN_1;
2487         I915_WRITE(reg, temp | FDI_TX_ENABLE);
2488
2489         reg = FDI_RX_CTL(pipe);
2490         temp = I915_READ(reg);
2491         temp &= ~FDI_LINK_TRAIN_NONE;
2492         temp |= FDI_LINK_TRAIN_PATTERN_1;
2493         I915_WRITE(reg, temp | FDI_RX_ENABLE);
2494
2495         POSTING_READ(reg);
2496         udelay(150);
2497
2498         /* Ironlake workaround, enable clock pointer after FDI enable*/
2499         I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR);
2500         I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR |
2501                    FDI_RX_PHASE_SYNC_POINTER_EN);
2502
2503         reg = FDI_RX_IIR(pipe);
2504         for (tries = 0; tries < 5; tries++) {
2505                 temp = I915_READ(reg);
2506                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2507
2508                 if ((temp & FDI_RX_BIT_LOCK)) {
2509                         DRM_DEBUG_KMS("FDI train 1 done.\n");
2510                         I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2511                         break;
2512                 }
2513         }
2514         if (tries == 5)
2515                 DRM_ERROR("FDI train 1 fail!\n");
2516
2517         /* Train 2 */
2518         reg = FDI_TX_CTL(pipe);
2519         temp = I915_READ(reg);
2520         temp &= ~FDI_LINK_TRAIN_NONE;
2521         temp |= FDI_LINK_TRAIN_PATTERN_2;
2522         I915_WRITE(reg, temp);
2523
2524         reg = FDI_RX_CTL(pipe);
2525         temp = I915_READ(reg);
2526         temp &= ~FDI_LINK_TRAIN_NONE;
2527         temp |= FDI_LINK_TRAIN_PATTERN_2;
2528         I915_WRITE(reg, temp);
2529
2530         POSTING_READ(reg);
2531         udelay(150);
2532
2533         reg = FDI_RX_IIR(pipe);
2534         for (tries = 0; tries < 5; tries++) {
2535                 temp = I915_READ(reg);
2536                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2537
2538                 if (temp & FDI_RX_SYMBOL_LOCK) {
2539                         I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2540                         DRM_DEBUG_KMS("FDI train 2 done.\n");
2541                         break;
2542                 }
2543         }
2544         if (tries == 5)
2545                 DRM_ERROR("FDI train 2 fail!\n");
2546
2547         DRM_DEBUG_KMS("FDI train done\n");
2548
2549 }
2550
2551 static const int snb_b_fdi_train_param[] = {
2552         FDI_LINK_TRAIN_400MV_0DB_SNB_B,
2553         FDI_LINK_TRAIN_400MV_6DB_SNB_B,
2554         FDI_LINK_TRAIN_600MV_3_5DB_SNB_B,
2555         FDI_LINK_TRAIN_800MV_0DB_SNB_B,
2556 };
2557
2558 /* The FDI link training functions for SNB/Cougarpoint. */
2559 static void gen6_fdi_link_train(struct drm_crtc *crtc)
2560 {
2561         struct drm_device *dev = crtc->dev;
2562         struct drm_i915_private *dev_priv = dev->dev_private;
2563         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2564         int pipe = intel_crtc->pipe;
2565         u32 reg, temp, i, retry;
2566
2567         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2568            for train result */
2569         reg = FDI_RX_IMR(pipe);
2570         temp = I915_READ(reg);
2571         temp &= ~FDI_RX_SYMBOL_LOCK;
2572         temp &= ~FDI_RX_BIT_LOCK;
2573         I915_WRITE(reg, temp);
2574
2575         POSTING_READ(reg);
2576         udelay(150);
2577
2578         /* enable CPU FDI TX and PCH FDI RX */
2579         reg = FDI_TX_CTL(pipe);
2580         temp = I915_READ(reg);
2581         temp &= ~(7 << 19);
2582         temp |= (intel_crtc->fdi_lanes - 1) << 19;
2583         temp &= ~FDI_LINK_TRAIN_NONE;
2584         temp |= FDI_LINK_TRAIN_PATTERN_1;
2585         temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2586         /* SNB-B */
2587         temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2588         I915_WRITE(reg, temp | FDI_TX_ENABLE);
2589
2590         I915_WRITE(FDI_RX_MISC(pipe),
2591                    FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
2592
2593         reg = FDI_RX_CTL(pipe);
2594         temp = I915_READ(reg);
2595         if (HAS_PCH_CPT(dev)) {
2596                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2597                 temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2598         } else {
2599                 temp &= ~FDI_LINK_TRAIN_NONE;
2600                 temp |= FDI_LINK_TRAIN_PATTERN_1;
2601         }
2602         I915_WRITE(reg, temp | FDI_RX_ENABLE);
2603
2604         POSTING_READ(reg);
2605         udelay(150);
2606
2607         for (i = 0; i < 4; i++) {
2608                 reg = FDI_TX_CTL(pipe);
2609                 temp = I915_READ(reg);
2610                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2611                 temp |= snb_b_fdi_train_param[i];
2612                 I915_WRITE(reg, temp);
2613
2614                 POSTING_READ(reg);
2615                 udelay(500);
2616
2617                 for (retry = 0; retry < 5; retry++) {
2618                         reg = FDI_RX_IIR(pipe);
2619                         temp = I915_READ(reg);
2620                         DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2621                         if (temp & FDI_RX_BIT_LOCK) {
2622                                 I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2623                                 DRM_DEBUG_KMS("FDI train 1 done.\n");
2624                                 break;
2625                         }
2626                         udelay(50);
2627                 }
2628                 if (retry < 5)
2629                         break;
2630         }
2631         if (i == 4)
2632                 DRM_ERROR("FDI train 1 fail!\n");
2633
2634         /* Train 2 */
2635         reg = FDI_TX_CTL(pipe);
2636         temp = I915_READ(reg);
2637         temp &= ~FDI_LINK_TRAIN_NONE;
2638         temp |= FDI_LINK_TRAIN_PATTERN_2;
2639         if (IS_GEN6(dev)) {
2640                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2641                 /* SNB-B */
2642                 temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2643         }
2644         I915_WRITE(reg, temp);
2645
2646         reg = FDI_RX_CTL(pipe);
2647         temp = I915_READ(reg);
2648         if (HAS_PCH_CPT(dev)) {
2649                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2650                 temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
2651         } else {
2652                 temp &= ~FDI_LINK_TRAIN_NONE;
2653                 temp |= FDI_LINK_TRAIN_PATTERN_2;
2654         }
2655         I915_WRITE(reg, temp);
2656
2657         POSTING_READ(reg);
2658         udelay(150);
2659
2660         for (i = 0; i < 4; i++) {
2661                 reg = FDI_TX_CTL(pipe);
2662                 temp = I915_READ(reg);
2663                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2664                 temp |= snb_b_fdi_train_param[i];
2665                 I915_WRITE(reg, temp);
2666
2667                 POSTING_READ(reg);
2668                 udelay(500);
2669
2670                 for (retry = 0; retry < 5; retry++) {
2671                         reg = FDI_RX_IIR(pipe);
2672                         temp = I915_READ(reg);
2673                         DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2674                         if (temp & FDI_RX_SYMBOL_LOCK) {
2675                                 I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2676                                 DRM_DEBUG_KMS("FDI train 2 done.\n");
2677                                 break;
2678                         }
2679                         udelay(50);
2680                 }
2681                 if (retry < 5)
2682                         break;
2683         }
2684         if (i == 4)
2685                 DRM_ERROR("FDI train 2 fail!\n");
2686
2687         DRM_DEBUG_KMS("FDI train done.\n");
2688 }
2689
2690 /* Manual link training for Ivy Bridge A0 parts */
2691 static void ivb_manual_fdi_link_train(struct drm_crtc *crtc)
2692 {
2693         struct drm_device *dev = crtc->dev;
2694         struct drm_i915_private *dev_priv = dev->dev_private;
2695         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2696         int pipe = intel_crtc->pipe;
2697         u32 reg, temp, i;
2698
2699         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2700            for train result */
2701         reg = FDI_RX_IMR(pipe);
2702         temp = I915_READ(reg);
2703         temp &= ~FDI_RX_SYMBOL_LOCK;
2704         temp &= ~FDI_RX_BIT_LOCK;
2705         I915_WRITE(reg, temp);
2706
2707         POSTING_READ(reg);
2708         udelay(150);
2709
2710         DRM_DEBUG_KMS("FDI_RX_IIR before link train 0x%x\n",
2711                       I915_READ(FDI_RX_IIR(pipe)));
2712
2713         /* enable CPU FDI TX and PCH FDI RX */
2714         reg = FDI_TX_CTL(pipe);
2715         temp = I915_READ(reg);
2716         temp &= ~(7 << 19);
2717         temp |= (intel_crtc->fdi_lanes - 1) << 19;
2718         temp &= ~(FDI_LINK_TRAIN_AUTO | FDI_LINK_TRAIN_NONE_IVB);
2719         temp |= FDI_LINK_TRAIN_PATTERN_1_IVB;
2720         temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2721         temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2722         temp |= FDI_COMPOSITE_SYNC;
2723         I915_WRITE(reg, temp | FDI_TX_ENABLE);
2724
2725         I915_WRITE(FDI_RX_MISC(pipe),
2726                    FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
2727
2728         reg = FDI_RX_CTL(pipe);
2729         temp = I915_READ(reg);
2730         temp &= ~FDI_LINK_TRAIN_AUTO;
2731         temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2732         temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2733         temp |= FDI_COMPOSITE_SYNC;
2734         I915_WRITE(reg, temp | FDI_RX_ENABLE);
2735
2736         POSTING_READ(reg);
2737         udelay(150);
2738
2739         for (i = 0; i < 4; i++) {
2740                 reg = FDI_TX_CTL(pipe);
2741                 temp = I915_READ(reg);
2742                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2743                 temp |= snb_b_fdi_train_param[i];
2744                 I915_WRITE(reg, temp);
2745
2746                 POSTING_READ(reg);
2747                 udelay(500);
2748
2749                 reg = FDI_RX_IIR(pipe);
2750                 temp = I915_READ(reg);
2751                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2752
2753                 if (temp & FDI_RX_BIT_LOCK ||
2754                     (I915_READ(reg) & FDI_RX_BIT_LOCK)) {
2755                         I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2756                         DRM_DEBUG_KMS("FDI train 1 done, level %i.\n", i);
2757                         break;
2758                 }
2759         }
2760         if (i == 4)
2761                 DRM_ERROR("FDI train 1 fail!\n");
2762
2763         /* Train 2 */
2764         reg = FDI_TX_CTL(pipe);
2765         temp = I915_READ(reg);
2766         temp &= ~FDI_LINK_TRAIN_NONE_IVB;
2767         temp |= FDI_LINK_TRAIN_PATTERN_2_IVB;
2768         temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2769         temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2770         I915_WRITE(reg, temp);
2771
2772         reg = FDI_RX_CTL(pipe);
2773         temp = I915_READ(reg);
2774         temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2775         temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
2776         I915_WRITE(reg, temp);
2777
2778         POSTING_READ(reg);
2779         udelay(150);
2780
2781         for (i = 0; i < 4; i++) {
2782                 reg = FDI_TX_CTL(pipe);
2783                 temp = I915_READ(reg);
2784                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2785                 temp |= snb_b_fdi_train_param[i];
2786                 I915_WRITE(reg, temp);
2787
2788                 POSTING_READ(reg);
2789                 udelay(500);
2790
2791                 reg = FDI_RX_IIR(pipe);
2792                 temp = I915_READ(reg);
2793                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2794
2795                 if (temp & FDI_RX_SYMBOL_LOCK) {
2796                         I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2797                         DRM_DEBUG_KMS("FDI train 2 done, level %i.\n", i);
2798                         break;
2799                 }
2800         }
2801         if (i == 4)
2802                 DRM_ERROR("FDI train 2 fail!\n");
2803
2804         DRM_DEBUG_KMS("FDI train done.\n");
2805 }
2806
2807 static void ironlake_fdi_pll_enable(struct intel_crtc *intel_crtc)
2808 {
2809         struct drm_device *dev = intel_crtc->base.dev;
2810         struct drm_i915_private *dev_priv = dev->dev_private;
2811         int pipe = intel_crtc->pipe;
2812         u32 reg, temp;
2813
2814
2815         /* enable PCH FDI RX PLL, wait warmup plus DMI latency */
2816         reg = FDI_RX_CTL(pipe);
2817         temp = I915_READ(reg);
2818         temp &= ~((0x7 << 19) | (0x7 << 16));
2819         temp |= (intel_crtc->fdi_lanes - 1) << 19;
2820         temp |= (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
2821         I915_WRITE(reg, temp | FDI_RX_PLL_ENABLE);
2822
2823         POSTING_READ(reg);
2824         udelay(200);
2825
2826         /* Switch from Rawclk to PCDclk */
2827         temp = I915_READ(reg);
2828         I915_WRITE(reg, temp | FDI_PCDCLK);
2829
2830         POSTING_READ(reg);
2831         udelay(200);
2832
2833         /* Enable CPU FDI TX PLL, always on for Ironlake */
2834         reg = FDI_TX_CTL(pipe);
2835         temp = I915_READ(reg);
2836         if ((temp & FDI_TX_PLL_ENABLE) == 0) {
2837                 I915_WRITE(reg, temp | FDI_TX_PLL_ENABLE);
2838
2839                 POSTING_READ(reg);
2840                 udelay(100);
2841         }
2842 }
2843
2844 static void ironlake_fdi_pll_disable(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         /* Switch from PCDclk to Rawclk */
2852         reg = FDI_RX_CTL(pipe);
2853         temp = I915_READ(reg);
2854         I915_WRITE(reg, temp & ~FDI_PCDCLK);
2855
2856         /* Disable CPU FDI TX PLL */
2857         reg = FDI_TX_CTL(pipe);
2858         temp = I915_READ(reg);
2859         I915_WRITE(reg, temp & ~FDI_TX_PLL_ENABLE);
2860
2861         POSTING_READ(reg);
2862         udelay(100);
2863
2864         reg = FDI_RX_CTL(pipe);
2865         temp = I915_READ(reg);
2866         I915_WRITE(reg, temp & ~FDI_RX_PLL_ENABLE);
2867
2868         /* Wait for the clocks to turn off. */
2869         POSTING_READ(reg);
2870         udelay(100);
2871 }
2872
2873 static void ironlake_fdi_disable(struct drm_crtc *crtc)
2874 {
2875         struct drm_device *dev = crtc->dev;
2876         struct drm_i915_private *dev_priv = dev->dev_private;
2877         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2878         int pipe = intel_crtc->pipe;
2879         u32 reg, temp;
2880
2881         /* disable CPU FDI tx and PCH FDI rx */
2882         reg = FDI_TX_CTL(pipe);
2883         temp = I915_READ(reg);
2884         I915_WRITE(reg, temp & ~FDI_TX_ENABLE);
2885         POSTING_READ(reg);
2886
2887         reg = FDI_RX_CTL(pipe);
2888         temp = I915_READ(reg);
2889         temp &= ~(0x7 << 16);
2890         temp |= (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
2891         I915_WRITE(reg, temp & ~FDI_RX_ENABLE);
2892
2893         POSTING_READ(reg);
2894         udelay(100);
2895
2896         /* Ironlake workaround, disable clock pointer after downing FDI */
2897         if (HAS_PCH_IBX(dev)) {
2898                 I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR);
2899         }
2900
2901         /* still set train pattern 1 */
2902         reg = FDI_TX_CTL(pipe);
2903         temp = I915_READ(reg);
2904         temp &= ~FDI_LINK_TRAIN_NONE;
2905         temp |= FDI_LINK_TRAIN_PATTERN_1;
2906         I915_WRITE(reg, temp);
2907
2908         reg = FDI_RX_CTL(pipe);
2909         temp = I915_READ(reg);
2910         if (HAS_PCH_CPT(dev)) {
2911                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2912                 temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2913         } else {
2914                 temp &= ~FDI_LINK_TRAIN_NONE;
2915                 temp |= FDI_LINK_TRAIN_PATTERN_1;
2916         }
2917         /* BPC in FDI rx is consistent with that in PIPECONF */
2918         temp &= ~(0x07 << 16);
2919         temp |= (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) << 11;
2920         I915_WRITE(reg, temp);
2921
2922         POSTING_READ(reg);
2923         udelay(100);
2924 }
2925
2926 static bool intel_crtc_has_pending_flip(struct drm_crtc *crtc)
2927 {
2928         struct drm_device *dev = crtc->dev;
2929         struct drm_i915_private *dev_priv = dev->dev_private;
2930         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2931         unsigned long flags;
2932         bool pending;
2933
2934         if (i915_reset_in_progress(&dev_priv->gpu_error) ||
2935             intel_crtc->reset_counter != atomic_read(&dev_priv->gpu_error.reset_counter))
2936                 return false;
2937
2938         spin_lock_irqsave(&dev->event_lock, flags);
2939         pending = to_intel_crtc(crtc)->unpin_work != NULL;
2940         spin_unlock_irqrestore(&dev->event_lock, flags);
2941
2942         return pending;
2943 }
2944
2945 static void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc)
2946 {
2947         struct drm_device *dev = crtc->dev;
2948         struct drm_i915_private *dev_priv = dev->dev_private;
2949
2950         if (crtc->fb == NULL)
2951                 return;
2952
2953         WARN_ON(waitqueue_active(&dev_priv->pending_flip_queue));
2954
2955         wait_event(dev_priv->pending_flip_queue,
2956                    !intel_crtc_has_pending_flip(crtc));
2957
2958         mutex_lock(&dev->struct_mutex);
2959         intel_finish_fb(crtc->fb);
2960         mutex_unlock(&dev->struct_mutex);
2961 }
2962
2963 static bool ironlake_crtc_driving_pch(struct drm_crtc *crtc)
2964 {
2965         struct drm_device *dev = crtc->dev;
2966         struct intel_encoder *intel_encoder;
2967
2968         /*
2969          * If there's a non-PCH eDP on this crtc, it must be DP_A, and that
2970          * must be driven by its own crtc; no sharing is possible.
2971          */
2972         for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
2973                 switch (intel_encoder->type) {
2974                 case INTEL_OUTPUT_EDP:
2975                         if (!intel_encoder_is_pch_edp(&intel_encoder->base))
2976                                 return false;
2977                         continue;
2978                 }
2979         }
2980
2981         return true;
2982 }
2983
2984 static bool haswell_crtc_driving_pch(struct drm_crtc *crtc)
2985 {
2986         return intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG);
2987 }
2988
2989 /* Program iCLKIP clock to the desired frequency */
2990 static void lpt_program_iclkip(struct drm_crtc *crtc)
2991 {
2992         struct drm_device *dev = crtc->dev;
2993         struct drm_i915_private *dev_priv = dev->dev_private;
2994         u32 divsel, phaseinc, auxdiv, phasedir = 0;
2995         u32 temp;
2996
2997         mutex_lock(&dev_priv->dpio_lock);
2998
2999         /* It is necessary to ungate the pixclk gate prior to programming
3000          * the divisors, and gate it back when it is done.
3001          */
3002         I915_WRITE(PIXCLK_GATE, PIXCLK_GATE_GATE);
3003
3004         /* Disable SSCCTL */
3005         intel_sbi_write(dev_priv, SBI_SSCCTL6,
3006                         intel_sbi_read(dev_priv, SBI_SSCCTL6, SBI_ICLK) |
3007                                 SBI_SSCCTL_DISABLE,
3008                         SBI_ICLK);
3009
3010         /* 20MHz is a corner case which is out of range for the 7-bit divisor */
3011         if (crtc->mode.clock == 20000) {
3012                 auxdiv = 1;
3013                 divsel = 0x41;
3014                 phaseinc = 0x20;
3015         } else {
3016                 /* The iCLK virtual clock root frequency is in MHz,
3017                  * but the crtc->mode.clock in in KHz. To get the divisors,
3018                  * it is necessary to divide one by another, so we
3019                  * convert the virtual clock precision to KHz here for higher
3020                  * precision.
3021                  */
3022                 u32 iclk_virtual_root_freq = 172800 * 1000;
3023                 u32 iclk_pi_range = 64;
3024                 u32 desired_divisor, msb_divisor_value, pi_value;
3025
3026                 desired_divisor = (iclk_virtual_root_freq / crtc->mode.clock);
3027                 msb_divisor_value = desired_divisor / iclk_pi_range;
3028                 pi_value = desired_divisor % iclk_pi_range;
3029
3030                 auxdiv = 0;
3031                 divsel = msb_divisor_value - 2;
3032                 phaseinc = pi_value;
3033         }
3034
3035         /* This should not happen with any sane values */
3036         WARN_ON(SBI_SSCDIVINTPHASE_DIVSEL(divsel) &
3037                 ~SBI_SSCDIVINTPHASE_DIVSEL_MASK);
3038         WARN_ON(SBI_SSCDIVINTPHASE_DIR(phasedir) &
3039                 ~SBI_SSCDIVINTPHASE_INCVAL_MASK);
3040
3041         DRM_DEBUG_KMS("iCLKIP clock: found settings for %dKHz refresh rate: auxdiv=%x, divsel=%x, phasedir=%x, phaseinc=%x\n",
3042                         crtc->mode.clock,
3043                         auxdiv,
3044                         divsel,
3045                         phasedir,
3046                         phaseinc);
3047
3048         /* Program SSCDIVINTPHASE6 */
3049         temp = intel_sbi_read(dev_priv, SBI_SSCDIVINTPHASE6, SBI_ICLK);
3050         temp &= ~SBI_SSCDIVINTPHASE_DIVSEL_MASK;
3051         temp |= SBI_SSCDIVINTPHASE_DIVSEL(divsel);
3052         temp &= ~SBI_SSCDIVINTPHASE_INCVAL_MASK;
3053         temp |= SBI_SSCDIVINTPHASE_INCVAL(phaseinc);
3054         temp |= SBI_SSCDIVINTPHASE_DIR(phasedir);
3055         temp |= SBI_SSCDIVINTPHASE_PROPAGATE;
3056         intel_sbi_write(dev_priv, SBI_SSCDIVINTPHASE6, temp, SBI_ICLK);
3057
3058         /* Program SSCAUXDIV */
3059         temp = intel_sbi_read(dev_priv, SBI_SSCAUXDIV6, SBI_ICLK);
3060         temp &= ~SBI_SSCAUXDIV_FINALDIV2SEL(1);
3061         temp |= SBI_SSCAUXDIV_FINALDIV2SEL(auxdiv);
3062         intel_sbi_write(dev_priv, SBI_SSCAUXDIV6, temp, SBI_ICLK);
3063
3064         /* Enable modulator and associated divider */
3065         temp = intel_sbi_read(dev_priv, SBI_SSCCTL6, SBI_ICLK);
3066         temp &= ~SBI_SSCCTL_DISABLE;
3067         intel_sbi_write(dev_priv, SBI_SSCCTL6, temp, SBI_ICLK);
3068
3069         /* Wait for initialization time */
3070         udelay(24);
3071
3072         I915_WRITE(PIXCLK_GATE, PIXCLK_GATE_UNGATE);
3073
3074         mutex_unlock(&dev_priv->dpio_lock);
3075 }
3076
3077 /*
3078  * Enable PCH resources required for PCH ports:
3079  *   - PCH PLLs
3080  *   - FDI training & RX/TX
3081  *   - update transcoder timings
3082  *   - DP transcoding bits
3083  *   - transcoder
3084  */
3085 static void ironlake_pch_enable(struct drm_crtc *crtc)
3086 {
3087         struct drm_device *dev = crtc->dev;
3088         struct drm_i915_private *dev_priv = dev->dev_private;
3089         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3090         int pipe = intel_crtc->pipe;
3091         u32 reg, temp;
3092
3093         assert_transcoder_disabled(dev_priv, pipe);
3094
3095         /* Write the TU size bits before fdi link training, so that error
3096          * detection works. */
3097         I915_WRITE(FDI_RX_TUSIZE1(pipe),
3098                    I915_READ(PIPE_DATA_M1(pipe)) & TU_SIZE_MASK);
3099
3100         /* For PCH output, training FDI link */
3101         dev_priv->display.fdi_link_train(crtc);
3102
3103         /* XXX: pch pll's can be enabled any time before we enable the PCH
3104          * transcoder, and we actually should do this to not upset any PCH
3105          * transcoder that already use the clock when we share it.
3106          *
3107          * Note that enable_pch_pll tries to do the right thing, but get_pch_pll
3108          * unconditionally resets the pll - we need that to have the right LVDS
3109          * enable sequence. */
3110         ironlake_enable_pch_pll(intel_crtc);
3111
3112         if (HAS_PCH_CPT(dev)) {
3113                 u32 sel;
3114
3115                 temp = I915_READ(PCH_DPLL_SEL);
3116                 switch (pipe) {
3117                 default:
3118                 case 0:
3119                         temp |= TRANSA_DPLL_ENABLE;
3120                         sel = TRANSA_DPLLB_SEL;
3121                         break;
3122                 case 1:
3123                         temp |= TRANSB_DPLL_ENABLE;
3124                         sel = TRANSB_DPLLB_SEL;
3125                         break;
3126                 case 2:
3127                         temp |= TRANSC_DPLL_ENABLE;
3128                         sel = TRANSC_DPLLB_SEL;
3129                         break;
3130                 }
3131                 if (intel_crtc->pch_pll->pll_reg == _PCH_DPLL_B)
3132                         temp |= sel;
3133                 else
3134                         temp &= ~sel;
3135                 I915_WRITE(PCH_DPLL_SEL, temp);
3136         }
3137
3138         /* set transcoder timing, panel must allow it */
3139         assert_panel_unlocked(dev_priv, pipe);
3140         I915_WRITE(TRANS_HTOTAL(pipe), I915_READ(HTOTAL(pipe)));
3141         I915_WRITE(TRANS_HBLANK(pipe), I915_READ(HBLANK(pipe)));
3142         I915_WRITE(TRANS_HSYNC(pipe),  I915_READ(HSYNC(pipe)));
3143
3144         I915_WRITE(TRANS_VTOTAL(pipe), I915_READ(VTOTAL(pipe)));
3145         I915_WRITE(TRANS_VBLANK(pipe), I915_READ(VBLANK(pipe)));
3146         I915_WRITE(TRANS_VSYNC(pipe),  I915_READ(VSYNC(pipe)));
3147         I915_WRITE(TRANS_VSYNCSHIFT(pipe),  I915_READ(VSYNCSHIFT(pipe)));
3148
3149         intel_fdi_normal_train(crtc);
3150
3151         /* For PCH DP, enable TRANS_DP_CTL */
3152         if (HAS_PCH_CPT(dev) &&
3153             (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT) ||
3154              intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))) {
3155                 u32 bpc = (I915_READ(PIPECONF(pipe)) & PIPECONF_BPC_MASK) >> 5;
3156                 reg = TRANS_DP_CTL(pipe);
3157                 temp = I915_READ(reg);
3158                 temp &= ~(TRANS_DP_PORT_SEL_MASK |
3159                           TRANS_DP_SYNC_MASK |
3160                           TRANS_DP_BPC_MASK);
3161                 temp |= (TRANS_DP_OUTPUT_ENABLE |
3162                          TRANS_DP_ENH_FRAMING);
3163                 temp |= bpc << 9; /* same format but at 11:9 */
3164
3165                 if (crtc->mode.flags & DRM_MODE_FLAG_PHSYNC)
3166                         temp |= TRANS_DP_HSYNC_ACTIVE_HIGH;
3167                 if (crtc->mode.flags & DRM_MODE_FLAG_PVSYNC)
3168                         temp |= TRANS_DP_VSYNC_ACTIVE_HIGH;
3169
3170                 switch (intel_trans_dp_port_sel(crtc)) {
3171                 case PCH_DP_B:
3172                         temp |= TRANS_DP_PORT_SEL_B;
3173                         break;
3174                 case PCH_DP_C:
3175                         temp |= TRANS_DP_PORT_SEL_C;
3176                         break;
3177                 case PCH_DP_D:
3178                         temp |= TRANS_DP_PORT_SEL_D;
3179                         break;
3180                 default:
3181                         BUG();
3182                 }
3183
3184                 I915_WRITE(reg, temp);
3185         }
3186
3187         ironlake_enable_pch_transcoder(dev_priv, pipe);
3188 }
3189
3190 static void lpt_pch_enable(struct drm_crtc *crtc)
3191 {
3192         struct drm_device *dev = crtc->dev;
3193         struct drm_i915_private *dev_priv = dev->dev_private;
3194         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3195         enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder;
3196
3197         assert_transcoder_disabled(dev_priv, TRANSCODER_A);
3198
3199         lpt_program_iclkip(crtc);
3200
3201         /* Set transcoder timing. */
3202         I915_WRITE(_TRANS_HTOTAL_A, I915_READ(HTOTAL(cpu_transcoder)));
3203         I915_WRITE(_TRANS_HBLANK_A, I915_READ(HBLANK(cpu_transcoder)));
3204         I915_WRITE(_TRANS_HSYNC_A,  I915_READ(HSYNC(cpu_transcoder)));
3205
3206         I915_WRITE(_TRANS_VTOTAL_A, I915_READ(VTOTAL(cpu_transcoder)));
3207         I915_WRITE(_TRANS_VBLANK_A, I915_READ(VBLANK(cpu_transcoder)));
3208         I915_WRITE(_TRANS_VSYNC_A,  I915_READ(VSYNC(cpu_transcoder)));
3209         I915_WRITE(_TRANS_VSYNCSHIFT_A, I915_READ(VSYNCSHIFT(cpu_transcoder)));
3210
3211         lpt_enable_pch_transcoder(dev_priv, cpu_transcoder);
3212 }
3213
3214 static void intel_put_pch_pll(struct intel_crtc *intel_crtc)
3215 {
3216         struct intel_pch_pll *pll = intel_crtc->pch_pll;
3217
3218         if (pll == NULL)
3219                 return;
3220
3221         if (pll->refcount == 0) {
3222                 WARN(1, "bad PCH PLL refcount\n");
3223                 return;
3224         }
3225
3226         --pll->refcount;
3227         intel_crtc->pch_pll = NULL;
3228 }
3229
3230 static struct intel_pch_pll *intel_get_pch_pll(struct intel_crtc *intel_crtc, u32 dpll, u32 fp)
3231 {
3232         struct drm_i915_private *dev_priv = intel_crtc->base.dev->dev_private;
3233         struct intel_pch_pll *pll;
3234         int i;
3235
3236         pll = intel_crtc->pch_pll;
3237         if (pll) {
3238                 DRM_DEBUG_KMS("CRTC:%d reusing existing PCH PLL %x\n",
3239                               intel_crtc->base.base.id, pll->pll_reg);
3240                 goto prepare;
3241         }
3242
3243         if (HAS_PCH_IBX(dev_priv->dev)) {
3244                 /* Ironlake PCH has a fixed PLL->PCH pipe mapping. */
3245                 i = intel_crtc->pipe;
3246                 pll = &dev_priv->pch_plls[i];
3247
3248                 DRM_DEBUG_KMS("CRTC:%d using pre-allocated PCH PLL %x\n",
3249                               intel_crtc->base.base.id, pll->pll_reg);
3250
3251                 goto found;
3252         }
3253
3254         for (i = 0; i < dev_priv->num_pch_pll; i++) {
3255                 pll = &dev_priv->pch_plls[i];
3256
3257                 /* Only want to check enabled timings first */
3258                 if (pll->refcount == 0)
3259                         continue;
3260
3261                 if (dpll == (I915_READ(pll->pll_reg) & 0x7fffffff) &&
3262                     fp == I915_READ(pll->fp0_reg)) {
3263                         DRM_DEBUG_KMS("CRTC:%d sharing existing PCH PLL %x (refcount %d, ative %d)\n",
3264                                       intel_crtc->base.base.id,
3265                                       pll->pll_reg, pll->refcount, pll->active);
3266
3267                         goto found;
3268                 }
3269         }
3270
3271         /* Ok no matching timings, maybe there's a free one? */
3272         for (i = 0; i < dev_priv->num_pch_pll; i++) {
3273                 pll = &dev_priv->pch_plls[i];
3274                 if (pll->refcount == 0) {
3275                         DRM_DEBUG_KMS("CRTC:%d allocated PCH PLL %x\n",
3276                                       intel_crtc->base.base.id, pll->pll_reg);
3277                         goto found;
3278                 }
3279         }
3280
3281         return NULL;
3282
3283 found:
3284         intel_crtc->pch_pll = pll;
3285         pll->refcount++;
3286         DRM_DEBUG_DRIVER("using pll %d for pipe %d\n", i, intel_crtc->pipe);
3287 prepare: /* separate function? */
3288         DRM_DEBUG_DRIVER("switching PLL %x off\n", pll->pll_reg);
3289
3290         /* Wait for the clocks to stabilize before rewriting the regs */
3291         I915_WRITE(pll->pll_reg, dpll & ~DPLL_VCO_ENABLE);
3292         POSTING_READ(pll->pll_reg);
3293         udelay(150);
3294
3295         I915_WRITE(pll->fp0_reg, fp);
3296         I915_WRITE(pll->pll_reg, dpll & ~DPLL_VCO_ENABLE);
3297         pll->on = false;
3298         return pll;
3299 }
3300
3301 void intel_cpt_verify_modeset(struct drm_device *dev, int pipe)
3302 {
3303         struct drm_i915_private *dev_priv = dev->dev_private;
3304         int dslreg = PIPEDSL(pipe);
3305         u32 temp;
3306
3307         temp = I915_READ(dslreg);
3308         udelay(500);
3309         if (wait_for(I915_READ(dslreg) != temp, 5)) {
3310                 if (wait_for(I915_READ(dslreg) != temp, 5))
3311                         DRM_ERROR("mode set failed: pipe %d stuck\n", pipe);
3312         }
3313 }
3314
3315 static void ironlake_crtc_enable(struct drm_crtc *crtc)
3316 {
3317         struct drm_device *dev = crtc->dev;
3318         struct drm_i915_private *dev_priv = dev->dev_private;
3319         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3320         struct intel_encoder *encoder;
3321         int pipe = intel_crtc->pipe;
3322         int plane = intel_crtc->plane;
3323         u32 temp;
3324         bool is_pch_port;
3325
3326         WARN_ON(!crtc->enabled);
3327
3328         if (intel_crtc->active)
3329                 return;
3330
3331         intel_crtc->active = true;
3332         intel_update_watermarks(dev);
3333
3334         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
3335                 temp = I915_READ(PCH_LVDS);
3336                 if ((temp & LVDS_PORT_EN) == 0)
3337                         I915_WRITE(PCH_LVDS, temp | LVDS_PORT_EN);
3338         }
3339
3340         is_pch_port = ironlake_crtc_driving_pch(crtc);
3341
3342         if (is_pch_port) {
3343                 /* Note: FDI PLL enabling _must_ be done before we enable the
3344                  * cpu pipes, hence this is separate from all the other fdi/pch
3345                  * enabling. */
3346                 ironlake_fdi_pll_enable(intel_crtc);
3347         } else {
3348                 assert_fdi_tx_disabled(dev_priv, pipe);
3349                 assert_fdi_rx_disabled(dev_priv, pipe);
3350         }
3351
3352         for_each_encoder_on_crtc(dev, crtc, encoder)
3353                 if (encoder->pre_enable)
3354                         encoder->pre_enable(encoder);
3355
3356         /* Enable panel fitting for LVDS */
3357         if (dev_priv->pch_pf_size &&
3358             (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) ||
3359              intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))) {
3360                 /* Force use of hard-coded filter coefficients
3361                  * as some pre-programmed values are broken,
3362                  * e.g. x201.
3363                  */
3364                 if (IS_IVYBRIDGE(dev))
3365                         I915_WRITE(PF_CTL(pipe), PF_ENABLE | PF_FILTER_MED_3x3 |
3366                                                  PF_PIPE_SEL_IVB(pipe));
3367                 else
3368                         I915_WRITE(PF_CTL(pipe), PF_ENABLE | PF_FILTER_MED_3x3);
3369                 I915_WRITE(PF_WIN_POS(pipe), dev_priv->pch_pf_pos);
3370                 I915_WRITE(PF_WIN_SZ(pipe), dev_priv->pch_pf_size);
3371         }
3372
3373         /*
3374          * On ILK+ LUT must be loaded before the pipe is running but with
3375          * clocks enabled
3376          */
3377         intel_crtc_load_lut(crtc);
3378
3379         intel_enable_pipe(dev_priv, pipe, is_pch_port);
3380         intel_enable_plane(dev_priv, plane, pipe);
3381
3382         if (is_pch_port)
3383                 ironlake_pch_enable(crtc);
3384
3385         mutex_lock(&dev->struct_mutex);
3386         intel_update_fbc(dev);
3387         mutex_unlock(&dev->struct_mutex);
3388
3389         intel_crtc_update_cursor(crtc, true);
3390
3391         for_each_encoder_on_crtc(dev, crtc, encoder)
3392                 encoder->enable(encoder);
3393
3394         if (HAS_PCH_CPT(dev))
3395                 intel_cpt_verify_modeset(dev, intel_crtc->pipe);
3396
3397         /*
3398          * There seems to be a race in PCH platform hw (at least on some
3399          * outputs) where an enabled pipe still completes any pageflip right
3400          * away (as if the pipe is off) instead of waiting for vblank. As soon
3401          * as the first vblank happend, everything works as expected. Hence just
3402          * wait for one vblank before returning to avoid strange things
3403          * happening.
3404          */
3405         intel_wait_for_vblank(dev, intel_crtc->pipe);
3406 }
3407
3408 static void haswell_crtc_enable(struct drm_crtc *crtc)
3409 {
3410         struct drm_device *dev = crtc->dev;
3411         struct drm_i915_private *dev_priv = dev->dev_private;
3412         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3413         struct intel_encoder *encoder;
3414         int pipe = intel_crtc->pipe;
3415         int plane = intel_crtc->plane;
3416         bool is_pch_port;
3417
3418         WARN_ON(!crtc->enabled);
3419
3420         if (intel_crtc->active)
3421                 return;
3422
3423         intel_crtc->active = true;
3424         intel_update_watermarks(dev);
3425
3426         is_pch_port = haswell_crtc_driving_pch(crtc);
3427
3428         if (is_pch_port)
3429                 dev_priv->display.fdi_link_train(crtc);
3430
3431         for_each_encoder_on_crtc(dev, crtc, encoder)
3432                 if (encoder->pre_enable)
3433                         encoder->pre_enable(encoder);
3434
3435         intel_ddi_enable_pipe_clock(intel_crtc);
3436
3437         /* Enable panel fitting for eDP */
3438         if (dev_priv->pch_pf_size &&
3439             intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP)) {
3440                 /* Force use of hard-coded filter coefficients
3441                  * as some pre-programmed values are broken,
3442                  * e.g. x201.
3443                  */
3444                 I915_WRITE(PF_CTL(pipe), PF_ENABLE | PF_FILTER_MED_3x3 |
3445                                          PF_PIPE_SEL_IVB(pipe));
3446                 I915_WRITE(PF_WIN_POS(pipe), dev_priv->pch_pf_pos);
3447                 I915_WRITE(PF_WIN_SZ(pipe), dev_priv->pch_pf_size);
3448         }
3449
3450         /*
3451          * On ILK+ LUT must be loaded before the pipe is running but with
3452          * clocks enabled
3453          */
3454         intel_crtc_load_lut(crtc);
3455
3456         intel_ddi_set_pipe_settings(crtc);
3457         intel_ddi_enable_pipe_func(crtc);
3458
3459         intel_enable_pipe(dev_priv, pipe, is_pch_port);
3460         intel_enable_plane(dev_priv, plane, pipe);
3461
3462         if (is_pch_port)
3463                 lpt_pch_enable(crtc);
3464
3465         mutex_lock(&dev->struct_mutex);
3466         intel_update_fbc(dev);
3467         mutex_unlock(&dev->struct_mutex);
3468
3469         intel_crtc_update_cursor(crtc, true);
3470
3471         for_each_encoder_on_crtc(dev, crtc, encoder)
3472                 encoder->enable(encoder);
3473
3474         /*
3475          * There seems to be a race in PCH platform hw (at least on some
3476          * outputs) where an enabled pipe still completes any pageflip right
3477          * away (as if the pipe is off) instead of waiting for vblank. As soon
3478          * as the first vblank happend, everything works as expected. Hence just
3479          * wait for one vblank before returning to avoid strange things
3480          * happening.
3481          */
3482         intel_wait_for_vblank(dev, intel_crtc->pipe);
3483 }
3484
3485 static void ironlake_crtc_disable(struct drm_crtc *crtc)
3486 {
3487         struct drm_device *dev = crtc->dev;
3488         struct drm_i915_private *dev_priv = dev->dev_private;
3489         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3490         struct intel_encoder *encoder;
3491         int pipe = intel_crtc->pipe;
3492         int plane = intel_crtc->plane;
3493         u32 reg, temp;
3494
3495
3496         if (!intel_crtc->active)
3497                 return;
3498
3499         for_each_encoder_on_crtc(dev, crtc, encoder)
3500                 encoder->disable(encoder);
3501
3502         intel_crtc_wait_for_pending_flips(crtc);
3503         drm_vblank_off(dev, pipe);
3504         intel_crtc_update_cursor(crtc, false);
3505
3506         intel_disable_plane(dev_priv, plane, pipe);
3507
3508         if (dev_priv->cfb_plane == plane)
3509                 intel_disable_fbc(dev);
3510
3511         intel_disable_pipe(dev_priv, pipe);
3512
3513         /* Disable PF */
3514         I915_WRITE(PF_CTL(pipe), 0);
3515         I915_WRITE(PF_WIN_SZ(pipe), 0);
3516
3517         for_each_encoder_on_crtc(dev, crtc, encoder)
3518                 if (encoder->post_disable)
3519                         encoder->post_disable(encoder);
3520
3521         ironlake_fdi_disable(crtc);
3522
3523         ironlake_disable_pch_transcoder(dev_priv, pipe);
3524
3525         if (HAS_PCH_CPT(dev)) {
3526                 /* disable TRANS_DP_CTL */
3527                 reg = TRANS_DP_CTL(pipe);
3528                 temp = I915_READ(reg);
3529                 temp &= ~(TRANS_DP_OUTPUT_ENABLE | TRANS_DP_PORT_SEL_MASK);
3530                 temp |= TRANS_DP_PORT_SEL_NONE;
3531                 I915_WRITE(reg, temp);
3532
3533                 /* disable DPLL_SEL */
3534                 temp = I915_READ(PCH_DPLL_SEL);
3535                 switch (pipe) {
3536                 case 0:
3537                         temp &= ~(TRANSA_DPLL_ENABLE | TRANSA_DPLLB_SEL);
3538                         break;
3539                 case 1:
3540                         temp &= ~(TRANSB_DPLL_ENABLE | TRANSB_DPLLB_SEL);
3541                         break;
3542                 case 2:
3543                         /* C shares PLL A or B */
3544                         temp &= ~(TRANSC_DPLL_ENABLE | TRANSC_DPLLB_SEL);
3545                         break;
3546                 default:
3547                         BUG(); /* wtf */
3548                 }
3549                 I915_WRITE(PCH_DPLL_SEL, temp);
3550         }
3551
3552         /* disable PCH DPLL */
3553         intel_disable_pch_pll(intel_crtc);
3554
3555         ironlake_fdi_pll_disable(intel_crtc);
3556
3557         intel_crtc->active = false;
3558         intel_update_watermarks(dev);
3559
3560         mutex_lock(&dev->struct_mutex);
3561         intel_update_fbc(dev);
3562         mutex_unlock(&dev->struct_mutex);
3563 }
3564
3565 static void haswell_crtc_disable(struct drm_crtc *crtc)
3566 {
3567         struct drm_device *dev = crtc->dev;
3568         struct drm_i915_private *dev_priv = dev->dev_private;
3569         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3570         struct intel_encoder *encoder;
3571         int pipe = intel_crtc->pipe;
3572         int plane = intel_crtc->plane;
3573         enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder;
3574         bool is_pch_port;
3575
3576         if (!intel_crtc->active)
3577                 return;
3578
3579         is_pch_port = haswell_crtc_driving_pch(crtc);
3580
3581         for_each_encoder_on_crtc(dev, crtc, encoder)
3582                 encoder->disable(encoder);
3583
3584         intel_crtc_wait_for_pending_flips(crtc);
3585         drm_vblank_off(dev, pipe);
3586         intel_crtc_update_cursor(crtc, false);
3587
3588         intel_disable_plane(dev_priv, plane, pipe);
3589
3590         if (dev_priv->cfb_plane == plane)
3591                 intel_disable_fbc(dev);
3592
3593         intel_disable_pipe(dev_priv, pipe);
3594
3595         intel_ddi_disable_transcoder_func(dev_priv, cpu_transcoder);
3596
3597         /* Disable PF */
3598         I915_WRITE(PF_CTL(pipe), 0);
3599         I915_WRITE(PF_WIN_SZ(pipe), 0);
3600
3601         intel_ddi_disable_pipe_clock(intel_crtc);
3602
3603         for_each_encoder_on_crtc(dev, crtc, encoder)
3604                 if (encoder->post_disable)
3605                         encoder->post_disable(encoder);
3606
3607         if (is_pch_port) {
3608                 lpt_disable_pch_transcoder(dev_priv);
3609                 intel_ddi_fdi_disable(crtc);
3610         }
3611
3612         intel_crtc->active = false;
3613         intel_update_watermarks(dev);
3614
3615         mutex_lock(&dev->struct_mutex);
3616         intel_update_fbc(dev);
3617         mutex_unlock(&dev->struct_mutex);
3618 }
3619
3620 static void ironlake_crtc_off(struct drm_crtc *crtc)
3621 {
3622         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3623         intel_put_pch_pll(intel_crtc);
3624 }
3625
3626 static void haswell_crtc_off(struct drm_crtc *crtc)
3627 {
3628         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3629
3630         /* Stop saying we're using TRANSCODER_EDP because some other CRTC might
3631          * start using it. */
3632         intel_crtc->cpu_transcoder = (enum transcoder) intel_crtc->pipe;
3633
3634         intel_ddi_put_crtc_pll(crtc);
3635 }
3636
3637 static void intel_crtc_dpms_overlay(struct intel_crtc *intel_crtc, bool enable)
3638 {
3639         if (!enable && intel_crtc->overlay) {
3640                 struct drm_device *dev = intel_crtc->base.dev;
3641                 struct drm_i915_private *dev_priv = dev->dev_private;
3642
3643                 mutex_lock(&dev->struct_mutex);
3644                 dev_priv->mm.interruptible = false;
3645                 (void) intel_overlay_switch_off(intel_crtc->overlay);
3646                 dev_priv->mm.interruptible = true;
3647                 mutex_unlock(&dev->struct_mutex);
3648         }
3649
3650         /* Let userspace switch the overlay on again. In most cases userspace
3651          * has to recompute where to put it anyway.
3652          */
3653 }
3654
3655 /**
3656  * i9xx_fixup_plane - ugly workaround for G45 to fire up the hardware
3657  * cursor plane briefly if not already running after enabling the display
3658  * plane.
3659  * This workaround avoids occasional blank screens when self refresh is
3660  * enabled.
3661  */
3662 static void
3663 g4x_fixup_plane(struct drm_i915_private *dev_priv, enum pipe pipe)
3664 {
3665         u32 cntl = I915_READ(CURCNTR(pipe));
3666
3667         if ((cntl & CURSOR_MODE) == 0) {
3668                 u32 fw_bcl_self = I915_READ(FW_BLC_SELF);
3669
3670                 I915_WRITE(FW_BLC_SELF, fw_bcl_self & ~FW_BLC_SELF_EN);
3671                 I915_WRITE(CURCNTR(pipe), CURSOR_MODE_64_ARGB_AX);
3672                 intel_wait_for_vblank(dev_priv->dev, pipe);
3673                 I915_WRITE(CURCNTR(pipe), cntl);
3674                 I915_WRITE(CURBASE(pipe), I915_READ(CURBASE(pipe)));
3675                 I915_WRITE(FW_BLC_SELF, fw_bcl_self);
3676         }
3677 }
3678
3679 static void i9xx_crtc_enable(struct drm_crtc *crtc)
3680 {
3681         struct drm_device *dev = crtc->dev;
3682         struct drm_i915_private *dev_priv = dev->dev_private;
3683         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3684         struct intel_encoder *encoder;
3685         int pipe = intel_crtc->pipe;
3686         int plane = intel_crtc->plane;
3687
3688         WARN_ON(!crtc->enabled);
3689
3690         if (intel_crtc->active)
3691                 return;
3692
3693         intel_crtc->active = true;
3694         intel_update_watermarks(dev);
3695
3696         intel_enable_pll(dev_priv, pipe);
3697
3698         for_each_encoder_on_crtc(dev, crtc, encoder)
3699                 if (encoder->pre_enable)
3700                         encoder->pre_enable(encoder);
3701
3702         intel_enable_pipe(dev_priv, pipe, false);
3703         intel_enable_plane(dev_priv, plane, pipe);
3704         if (IS_G4X(dev))
3705                 g4x_fixup_plane(dev_priv, pipe);
3706
3707         intel_crtc_load_lut(crtc);
3708         intel_update_fbc(dev);
3709
3710         /* Give the overlay scaler a chance to enable if it's on this pipe */
3711         intel_crtc_dpms_overlay(intel_crtc, true);
3712         intel_crtc_update_cursor(crtc, true);
3713
3714         for_each_encoder_on_crtc(dev, crtc, encoder)
3715                 encoder->enable(encoder);
3716 }
3717
3718 static void i9xx_crtc_disable(struct drm_crtc *crtc)
3719 {
3720         struct drm_device *dev = crtc->dev;
3721         struct drm_i915_private *dev_priv = dev->dev_private;
3722         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3723         struct intel_encoder *encoder;
3724         int pipe = intel_crtc->pipe;
3725         int plane = intel_crtc->plane;
3726         u32 pctl;
3727
3728
3729         if (!intel_crtc->active)
3730                 return;
3731
3732         for_each_encoder_on_crtc(dev, crtc, encoder)
3733                 encoder->disable(encoder);
3734
3735         /* Give the overlay scaler a chance to disable if it's on this pipe */
3736         intel_crtc_wait_for_pending_flips(crtc);
3737         drm_vblank_off(dev, pipe);
3738         intel_crtc_dpms_overlay(intel_crtc, false);
3739         intel_crtc_update_cursor(crtc, false);
3740
3741         if (dev_priv->cfb_plane == plane)
3742                 intel_disable_fbc(dev);
3743
3744         intel_disable_plane(dev_priv, plane, pipe);
3745         intel_disable_pipe(dev_priv, pipe);
3746
3747         /* Disable pannel fitter if it is on this pipe. */
3748         pctl = I915_READ(PFIT_CONTROL);
3749         if ((pctl & PFIT_ENABLE) &&
3750             ((pctl & PFIT_PIPE_MASK) >> PFIT_PIPE_SHIFT) == pipe)
3751                 I915_WRITE(PFIT_CONTROL, 0);
3752
3753         intel_disable_pll(dev_priv, pipe);
3754
3755         intel_crtc->active = false;
3756         intel_update_fbc(dev);
3757         intel_update_watermarks(dev);
3758 }
3759
3760 static void i9xx_crtc_off(struct drm_crtc *crtc)
3761 {
3762 }
3763
3764 static void intel_crtc_update_sarea(struct drm_crtc *crtc,
3765                                     bool enabled)
3766 {
3767         struct drm_device *dev = crtc->dev;
3768         struct drm_i915_master_private *master_priv;
3769         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3770         int pipe = intel_crtc->pipe;
3771
3772         if (!dev->primary->master)
3773                 return;
3774
3775         master_priv = dev->primary->master->driver_priv;
3776         if (!master_priv->sarea_priv)
3777                 return;
3778
3779         switch (pipe) {
3780         case 0:
3781                 master_priv->sarea_priv->pipeA_w = enabled ? crtc->mode.hdisplay : 0;
3782                 master_priv->sarea_priv->pipeA_h = enabled ? crtc->mode.vdisplay : 0;
3783                 break;
3784         case 1:
3785                 master_priv->sarea_priv->pipeB_w = enabled ? crtc->mode.hdisplay : 0;
3786                 master_priv->sarea_priv->pipeB_h = enabled ? crtc->mode.vdisplay : 0;
3787                 break;
3788         default:
3789                 DRM_ERROR("Can't update pipe %c in SAREA\n", pipe_name(pipe));
3790                 break;
3791         }
3792 }
3793
3794 /**
3795  * Sets the power management mode of the pipe and plane.
3796  */
3797 void intel_crtc_update_dpms(struct drm_crtc *crtc)
3798 {
3799         struct drm_device *dev = crtc->dev;
3800         struct drm_i915_private *dev_priv = dev->dev_private;
3801         struct intel_encoder *intel_encoder;
3802         bool enable = false;
3803
3804         for_each_encoder_on_crtc(dev, crtc, intel_encoder)
3805                 enable |= intel_encoder->connectors_active;
3806
3807         if (enable)
3808                 dev_priv->display.crtc_enable(crtc);
3809         else
3810                 dev_priv->display.crtc_disable(crtc);
3811
3812         intel_crtc_update_sarea(crtc, enable);
3813 }
3814
3815 static void intel_crtc_disable(struct drm_crtc *crtc)
3816 {
3817         struct drm_device *dev = crtc->dev;
3818         struct drm_connector *connector;
3819         struct drm_i915_private *dev_priv = dev->dev_private;
3820         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3821
3822         /* crtc should still be enabled when we disable it. */
3823         WARN_ON(!crtc->enabled);
3824
3825         intel_crtc->eld_vld = false;
3826         dev_priv->display.crtc_disable(crtc);
3827         intel_crtc_update_sarea(crtc, false);
3828         dev_priv->display.off(crtc);
3829
3830         assert_plane_disabled(dev->dev_private, to_intel_crtc(crtc)->plane);
3831         assert_pipe_disabled(dev->dev_private, to_intel_crtc(crtc)->pipe);
3832
3833         if (crtc->fb) {
3834                 mutex_lock(&dev->struct_mutex);
3835                 intel_unpin_fb_obj(to_intel_framebuffer(crtc->fb)->obj);
3836                 mutex_unlock(&dev->struct_mutex);
3837                 crtc->fb = NULL;
3838         }
3839
3840         /* Update computed state. */
3841         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
3842                 if (!connector->encoder || !connector->encoder->crtc)
3843                         continue;
3844
3845                 if (connector->encoder->crtc != crtc)
3846                         continue;
3847
3848                 connector->dpms = DRM_MODE_DPMS_OFF;
3849                 to_intel_encoder(connector->encoder)->connectors_active = false;
3850         }
3851 }
3852
3853 void intel_modeset_disable(struct drm_device *dev)
3854 {
3855         struct drm_crtc *crtc;
3856
3857         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
3858                 if (crtc->enabled)
3859                         intel_crtc_disable(crtc);
3860         }
3861 }
3862
3863 void intel_encoder_destroy(struct drm_encoder *encoder)
3864 {
3865         struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
3866
3867         drm_encoder_cleanup(encoder);
3868         kfree(intel_encoder);
3869 }
3870
3871 /* Simple dpms helper for encodres with just one connector, no cloning and only
3872  * one kind of off state. It clamps all !ON modes to fully OFF and changes the
3873  * state of the entire output pipe. */
3874 void intel_encoder_dpms(struct intel_encoder *encoder, int mode)
3875 {
3876         if (mode == DRM_MODE_DPMS_ON) {
3877                 encoder->connectors_active = true;
3878
3879                 intel_crtc_update_dpms(encoder->base.crtc);
3880         } else {
3881                 encoder->connectors_active = false;
3882
3883                 intel_crtc_update_dpms(encoder->base.crtc);
3884         }
3885 }
3886
3887 /* Cross check the actual hw state with our own modeset state tracking (and it's
3888  * internal consistency). */
3889 static void intel_connector_check_state(struct intel_connector *connector)
3890 {
3891         if (connector->get_hw_state(connector)) {
3892                 struct intel_encoder *encoder = connector->encoder;
3893                 struct drm_crtc *crtc;
3894                 bool encoder_enabled;
3895                 enum pipe pipe;
3896
3897                 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
3898                               connector->base.base.id,
3899                               drm_get_connector_name(&connector->base));
3900
3901                 WARN(connector->base.dpms == DRM_MODE_DPMS_OFF,
3902                      "wrong connector dpms state\n");
3903                 WARN(connector->base.encoder != &encoder->base,
3904                      "active connector not linked to encoder\n");
3905                 WARN(!encoder->connectors_active,
3906                      "encoder->connectors_active not set\n");
3907
3908                 encoder_enabled = encoder->get_hw_state(encoder, &pipe);
3909                 WARN(!encoder_enabled, "encoder not enabled\n");
3910                 if (WARN_ON(!encoder->base.crtc))
3911                         return;
3912
3913                 crtc = encoder->base.crtc;
3914
3915                 WARN(!crtc->enabled, "crtc not enabled\n");
3916                 WARN(!to_intel_crtc(crtc)->active, "crtc not active\n");
3917                 WARN(pipe != to_intel_crtc(crtc)->pipe,
3918                      "encoder active on the wrong pipe\n");
3919         }
3920 }
3921
3922 /* Even simpler default implementation, if there's really no special case to
3923  * consider. */
3924 void intel_connector_dpms(struct drm_connector *connector, int mode)
3925 {
3926         struct intel_encoder *encoder = intel_attached_encoder(connector);
3927
3928         /* All the simple cases only support two dpms states. */
3929         if (mode != DRM_MODE_DPMS_ON)
3930                 mode = DRM_MODE_DPMS_OFF;
3931
3932         if (mode == connector->dpms)
3933                 return;
3934
3935         connector->dpms = mode;
3936
3937         /* Only need to change hw state when actually enabled */
3938         if (encoder->base.crtc)
3939                 intel_encoder_dpms(encoder, mode);
3940         else
3941                 WARN_ON(encoder->connectors_active != false);
3942
3943         intel_modeset_check_state(connector->dev);
3944 }
3945
3946 /* Simple connector->get_hw_state implementation for encoders that support only
3947  * one connector and no cloning and hence the encoder state determines the state
3948  * of the connector. */
3949 bool intel_connector_get_hw_state(struct intel_connector *connector)
3950 {
3951         enum pipe pipe = 0;
3952         struct intel_encoder *encoder = connector->encoder;
3953
3954         return encoder->get_hw_state(encoder, &pipe);
3955 }
3956
3957 static bool intel_crtc_mode_fixup(struct drm_crtc *crtc,
3958                                   const struct drm_display_mode *mode,
3959                                   struct drm_display_mode *adjusted_mode)
3960 {
3961         struct drm_device *dev = crtc->dev;
3962
3963         if (HAS_PCH_SPLIT(dev)) {
3964                 /* FDI link clock is fixed at 2.7G */
3965                 if (mode->clock * 3 > IRONLAKE_FDI_FREQ * 4)
3966                         return false;
3967         }
3968
3969         /* All interlaced capable intel hw wants timings in frames. Note though
3970          * that intel_lvds_mode_fixup does some funny tricks with the crtc
3971          * timings, so we need to be careful not to clobber these.*/
3972         if (!(adjusted_mode->private_flags & INTEL_MODE_CRTC_TIMINGS_SET))
3973                 drm_mode_set_crtcinfo(adjusted_mode, 0);
3974
3975         /* WaPruneModeWithIncorrectHsyncOffset: Cantiga+ cannot handle modes
3976          * with a hsync front porch of 0.
3977          */
3978         if ((INTEL_INFO(dev)->gen > 4 || IS_G4X(dev)) &&
3979                 adjusted_mode->hsync_start == adjusted_mode->hdisplay)
3980                 return false;
3981
3982         return true;
3983 }
3984
3985 static int valleyview_get_display_clock_speed(struct drm_device *dev)
3986 {
3987         return 400000; /* FIXME */
3988 }
3989
3990 static int i945_get_display_clock_speed(struct drm_device *dev)
3991 {
3992         return 400000;
3993 }
3994
3995 static int i915_get_display_clock_speed(struct drm_device *dev)
3996 {
3997         return 333000;
3998 }
3999
4000 static int i9xx_misc_get_display_clock_speed(struct drm_device *dev)
4001 {
4002         return 200000;
4003 }
4004
4005 static int i915gm_get_display_clock_speed(struct drm_device *dev)
4006 {
4007         u16 gcfgc = 0;
4008
4009         pci_read_config_word(dev->pdev, GCFGC, &gcfgc);
4010
4011         if (gcfgc & GC_LOW_FREQUENCY_ENABLE)
4012                 return 133000;
4013         else {
4014                 switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
4015                 case GC_DISPLAY_CLOCK_333_MHZ:
4016                         return 333000;
4017                 default:
4018                 case GC_DISPLAY_CLOCK_190_200_MHZ:
4019                         return 190000;
4020                 }
4021         }
4022 }
4023
4024 static int i865_get_display_clock_speed(struct drm_device *dev)
4025 {
4026         return 266000;
4027 }
4028
4029 static int i855_get_display_clock_speed(struct drm_device *dev)
4030 {
4031         u16 hpllcc = 0;
4032         /* Assume that the hardware is in the high speed state.  This
4033          * should be the default.
4034          */
4035         switch (hpllcc & GC_CLOCK_CONTROL_MASK) {
4036         case GC_CLOCK_133_200:
4037         case GC_CLOCK_100_200:
4038                 return 200000;
4039         case GC_CLOCK_166_250:
4040                 return 250000;
4041         case GC_CLOCK_100_133:
4042                 return 133000;
4043         }
4044
4045         /* Shouldn't happen */
4046         return 0;
4047 }
4048
4049 static int i830_get_display_clock_speed(struct drm_device *dev)
4050 {
4051         return 133000;
4052 }
4053
4054 static void
4055 intel_reduce_ratio(uint32_t *num, uint32_t *den)
4056 {
4057         while (*num > 0xffffff || *den > 0xffffff) {
4058                 *num >>= 1;
4059                 *den >>= 1;
4060         }
4061 }
4062
4063 void
4064 intel_link_compute_m_n(int bits_per_pixel, int nlanes,
4065                        int pixel_clock, int link_clock,
4066                        struct intel_link_m_n *m_n)
4067 {
4068         m_n->tu = 64;
4069         m_n->gmch_m = bits_per_pixel * pixel_clock;
4070         m_n->gmch_n = link_clock * nlanes * 8;
4071         intel_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n);
4072         m_n->link_m = pixel_clock;
4073         m_n->link_n = link_clock;
4074         intel_reduce_ratio(&m_n->link_m, &m_n->link_n);
4075 }
4076
4077 static inline bool intel_panel_use_ssc(struct drm_i915_private *dev_priv)
4078 {
4079         if (i915_panel_use_ssc >= 0)
4080                 return i915_panel_use_ssc != 0;
4081         return dev_priv->lvds_use_ssc
4082                 && !(dev_priv->quirks & QUIRK_LVDS_SSC_DISABLE);
4083 }
4084
4085 /**
4086  * intel_choose_pipe_bpp_dither - figure out what color depth the pipe should send
4087  * @crtc: CRTC structure
4088  * @mode: requested mode
4089  *
4090  * A pipe may be connected to one or more outputs.  Based on the depth of the
4091  * attached framebuffer, choose a good color depth to use on the pipe.
4092  *
4093  * If possible, match the pipe depth to the fb depth.  In some cases, this
4094  * isn't ideal, because the connected output supports a lesser or restricted
4095  * set of depths.  Resolve that here:
4096  *    LVDS typically supports only 6bpc, so clamp down in that case
4097  *    HDMI supports only 8bpc or 12bpc, so clamp to 8bpc with dither for 10bpc
4098  *    Displays may support a restricted set as well, check EDID and clamp as
4099  *      appropriate.
4100  *    DP may want to dither down to 6bpc to fit larger modes
4101  *
4102  * RETURNS:
4103  * Dithering requirement (i.e. false if display bpc and pipe bpc match,
4104  * true if they don't match).
4105  */
4106 static bool intel_choose_pipe_bpp_dither(struct drm_crtc *crtc,
4107                                          struct drm_framebuffer *fb,
4108                                          unsigned int *pipe_bpp,
4109                                          struct drm_display_mode *mode)
4110 {
4111         struct drm_device *dev = crtc->dev;
4112         struct drm_i915_private *dev_priv = dev->dev_private;
4113         struct drm_connector *connector;
4114         struct intel_encoder *intel_encoder;
4115         unsigned int display_bpc = UINT_MAX, bpc;
4116
4117         /* Walk the encoders & connectors on this crtc, get min bpc */
4118         for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
4119
4120                 if (intel_encoder->type == INTEL_OUTPUT_LVDS) {
4121                         unsigned int lvds_bpc;
4122
4123                         if ((I915_READ(PCH_LVDS) & LVDS_A3_POWER_MASK) ==
4124                             LVDS_A3_POWER_UP)
4125                                 lvds_bpc = 8;
4126                         else
4127                                 lvds_bpc = 6;
4128
4129                         if (lvds_bpc < display_bpc) {
4130                                 DRM_DEBUG_KMS("clamping display bpc (was %d) to LVDS (%d)\n", display_bpc, lvds_bpc);
4131                                 display_bpc = lvds_bpc;
4132                         }
4133                         continue;
4134                 }
4135
4136                 /* Not one of the known troublemakers, check the EDID */
4137                 list_for_each_entry(connector, &dev->mode_config.connector_list,
4138                                     head) {
4139                         if (connector->encoder != &intel_encoder->base)
4140                                 continue;
4141
4142                         /* Don't use an invalid EDID bpc value */
4143                         if (connector->display_info.bpc &&
4144                             connector->display_info.bpc < display_bpc) {
4145                                 DRM_DEBUG_KMS("clamping display bpc (was %d) to EDID reported max of %d\n", display_bpc, connector->display_info.bpc);
4146                                 display_bpc = connector->display_info.bpc;
4147                         }
4148                 }
4149
4150                 if (intel_encoder->type == INTEL_OUTPUT_EDP) {
4151                         /* Use VBT settings if we have an eDP panel */
4152                         unsigned int edp_bpc = dev_priv->edp.bpp / 3;
4153
4154                         if (edp_bpc && edp_bpc < display_bpc) {
4155                                 DRM_DEBUG_KMS("clamping display bpc (was %d) to eDP (%d)\n", display_bpc, edp_bpc);
4156                                 display_bpc = edp_bpc;
4157                         }
4158                         continue;
4159                 }
4160
4161                 /*
4162                  * HDMI is either 12 or 8, so if the display lets 10bpc sneak
4163                  * through, clamp it down.  (Note: >12bpc will be caught below.)
4164                  */
4165                 if (intel_encoder->type == INTEL_OUTPUT_HDMI) {
4166                         if (display_bpc > 8 && display_bpc < 12) {
4167                                 DRM_DEBUG_KMS("forcing bpc to 12 for HDMI\n");
4168                                 display_bpc = 12;
4169                         } else {
4170                                 DRM_DEBUG_KMS("forcing bpc to 8 for HDMI\n");
4171                                 display_bpc = 8;
4172                         }
4173                 }
4174         }
4175
4176         if (mode->private_flags & INTEL_MODE_DP_FORCE_6BPC) {
4177                 DRM_DEBUG_KMS("Dithering DP to 6bpc\n");
4178                 display_bpc = 6;
4179         }
4180
4181         /*
4182          * We could just drive the pipe at the highest bpc all the time and
4183          * enable dithering as needed, but that costs bandwidth.  So choose
4184          * the minimum value that expresses the full color range of the fb but
4185          * also stays within the max display bpc discovered above.
4186          */
4187
4188         switch (fb->depth) {
4189         case 8:
4190                 bpc = 8; /* since we go through a colormap */
4191                 break;
4192         case 15:
4193         case 16:
4194                 bpc = 6; /* min is 18bpp */
4195                 break;
4196         case 24:
4197                 bpc = 8;
4198                 break;
4199         case 30:
4200                 bpc = 10;
4201                 break;
4202         case 48:
4203                 bpc = 12;
4204                 break;
4205         default:
4206                 DRM_DEBUG("unsupported depth, assuming 24 bits\n");
4207                 bpc = min((unsigned int)8, display_bpc);
4208                 break;
4209         }
4210
4211         display_bpc = min(display_bpc, bpc);
4212
4213         DRM_DEBUG_KMS("setting pipe bpc to %d (max display bpc %d)\n",
4214                       bpc, display_bpc);
4215
4216         *pipe_bpp = display_bpc * 3;
4217
4218         return display_bpc != bpc;
4219 }
4220
4221 static int vlv_get_refclk(struct drm_crtc *crtc)
4222 {
4223         struct drm_device *dev = crtc->dev;
4224         struct drm_i915_private *dev_priv = dev->dev_private;
4225         int refclk = 27000; /* for DP & HDMI */
4226
4227         return 100000; /* only one validated so far */
4228
4229         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG)) {
4230                 refclk = 96000;
4231         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
4232                 if (intel_panel_use_ssc(dev_priv))
4233                         refclk = 100000;
4234                 else
4235                         refclk = 96000;
4236         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP)) {
4237                 refclk = 100000;
4238         }
4239
4240         return refclk;
4241 }
4242
4243 static int i9xx_get_refclk(struct drm_crtc *crtc, int num_connectors)
4244 {
4245         struct drm_device *dev = crtc->dev;
4246         struct drm_i915_private *dev_priv = dev->dev_private;
4247         int refclk;
4248
4249         if (IS_VALLEYVIEW(dev)) {
4250                 refclk = vlv_get_refclk(crtc);
4251         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
4252             intel_panel_use_ssc(dev_priv) && num_connectors < 2) {
4253                 refclk = dev_priv->lvds_ssc_freq * 1000;
4254                 DRM_DEBUG_KMS("using SSC reference clock of %d MHz\n",
4255                               refclk / 1000);
4256         } else if (!IS_GEN2(dev)) {
4257                 refclk = 96000;
4258         } else {
4259                 refclk = 48000;
4260         }
4261
4262         return refclk;
4263 }
4264
4265 static void i9xx_adjust_sdvo_tv_clock(struct drm_display_mode *adjusted_mode,
4266                                       intel_clock_t *clock)
4267 {
4268         /* SDVO TV has fixed PLL values depend on its clock range,
4269            this mirrors vbios setting. */
4270         if (adjusted_mode->clock >= 100000
4271             && adjusted_mode->clock < 140500) {
4272                 clock->p1 = 2;
4273                 clock->p2 = 10;
4274                 clock->n = 3;
4275                 clock->m1 = 16;
4276                 clock->m2 = 8;
4277         } else if (adjusted_mode->clock >= 140500
4278                    && adjusted_mode->clock <= 200000) {
4279                 clock->p1 = 1;
4280                 clock->p2 = 10;
4281                 clock->n = 6;
4282                 clock->m1 = 12;
4283                 clock->m2 = 8;
4284         }
4285 }
4286
4287 static void i9xx_update_pll_dividers(struct drm_crtc *crtc,
4288                                      intel_clock_t *clock,
4289                                      intel_clock_t *reduced_clock)
4290 {
4291         struct drm_device *dev = crtc->dev;
4292         struct drm_i915_private *dev_priv = dev->dev_private;
4293         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4294         int pipe = intel_crtc->pipe;
4295         u32 fp, fp2 = 0;
4296
4297         if (IS_PINEVIEW(dev)) {
4298                 fp = (1 << clock->n) << 16 | clock->m1 << 8 | clock->m2;
4299                 if (reduced_clock)
4300                         fp2 = (1 << reduced_clock->n) << 16 |
4301                                 reduced_clock->m1 << 8 | reduced_clock->m2;
4302         } else {
4303                 fp = clock->n << 16 | clock->m1 << 8 | clock->m2;
4304                 if (reduced_clock)
4305                         fp2 = reduced_clock->n << 16 | reduced_clock->m1 << 8 |
4306                                 reduced_clock->m2;
4307         }
4308
4309         I915_WRITE(FP0(pipe), fp);
4310
4311         intel_crtc->lowfreq_avail = false;
4312         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
4313             reduced_clock && i915_powersave) {
4314                 I915_WRITE(FP1(pipe), fp2);
4315                 intel_crtc->lowfreq_avail = true;
4316         } else {
4317                 I915_WRITE(FP1(pipe), fp);
4318         }
4319 }
4320
4321 static void vlv_update_pll(struct drm_crtc *crtc,
4322                            struct drm_display_mode *mode,
4323                            struct drm_display_mode *adjusted_mode,
4324                            intel_clock_t *clock, intel_clock_t *reduced_clock,
4325                            int num_connectors)
4326 {
4327         struct drm_device *dev = crtc->dev;
4328         struct drm_i915_private *dev_priv = dev->dev_private;
4329         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4330         int pipe = intel_crtc->pipe;
4331         u32 dpll, mdiv, pdiv;
4332         u32 bestn, bestm1, bestm2, bestp1, bestp2;
4333         bool is_sdvo;
4334         u32 temp;
4335
4336         mutex_lock(&dev_priv->dpio_lock);
4337
4338         is_sdvo = intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO) ||
4339                 intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI);
4340
4341         dpll = DPLL_VGA_MODE_DIS;
4342         dpll |= DPLL_EXT_BUFFER_ENABLE_VLV;
4343         dpll |= DPLL_REFA_CLK_ENABLE_VLV;
4344         dpll |= DPLL_INTEGRATED_CLOCK_VLV;
4345
4346         I915_WRITE(DPLL(pipe), dpll);
4347         POSTING_READ(DPLL(pipe));
4348
4349         bestn = clock->n;
4350         bestm1 = clock->m1;
4351         bestm2 = clock->m2;
4352         bestp1 = clock->p1;
4353         bestp2 = clock->p2;
4354
4355         /*
4356          * In Valleyview PLL and program lane counter registers are exposed
4357          * through DPIO interface
4358          */
4359         mdiv = ((bestm1 << DPIO_M1DIV_SHIFT) | (bestm2 & DPIO_M2DIV_MASK));
4360         mdiv |= ((bestp1 << DPIO_P1_SHIFT) | (bestp2 << DPIO_P2_SHIFT));
4361         mdiv |= ((bestn << DPIO_N_SHIFT));
4362         mdiv |= (1 << DPIO_POST_DIV_SHIFT);
4363         mdiv |= (1 << DPIO_K_SHIFT);
4364         mdiv |= DPIO_ENABLE_CALIBRATION;
4365         intel_dpio_write(dev_priv, DPIO_DIV(pipe), mdiv);
4366
4367         intel_dpio_write(dev_priv, DPIO_CORE_CLK(pipe), 0x01000000);
4368
4369         pdiv = (1 << DPIO_REFSEL_OVERRIDE) | (5 << DPIO_PLL_MODESEL_SHIFT) |
4370                 (3 << DPIO_BIAS_CURRENT_CTL_SHIFT) | (1<<20) |
4371                 (7 << DPIO_PLL_REFCLK_SEL_SHIFT) | (8 << DPIO_DRIVER_CTL_SHIFT) |
4372                 (5 << DPIO_CLK_BIAS_CTL_SHIFT);
4373         intel_dpio_write(dev_priv, DPIO_REFSFR(pipe), pdiv);
4374
4375         intel_dpio_write(dev_priv, DPIO_LFP_COEFF(pipe), 0x005f003b);
4376
4377         dpll |= DPLL_VCO_ENABLE;
4378         I915_WRITE(DPLL(pipe), dpll);
4379         POSTING_READ(DPLL(pipe));
4380         if (wait_for(((I915_READ(DPLL(pipe)) & DPLL_LOCK_VLV) == DPLL_LOCK_VLV), 1))
4381                 DRM_ERROR("DPLL %d failed to lock\n", pipe);
4382
4383         intel_dpio_write(dev_priv, DPIO_FASTCLK_DISABLE, 0x620);
4384
4385         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT))
4386                 intel_dp_set_m_n(crtc, mode, adjusted_mode);
4387
4388         I915_WRITE(DPLL(pipe), dpll);
4389
4390         /* Wait for the clocks to stabilize. */
4391         POSTING_READ(DPLL(pipe));
4392         udelay(150);
4393
4394         temp = 0;
4395         if (is_sdvo) {
4396                 temp = intel_mode_get_pixel_multiplier(adjusted_mode);
4397                 if (temp > 1)
4398                         temp = (temp - 1) << DPLL_MD_UDI_MULTIPLIER_SHIFT;
4399                 else
4400                         temp = 0;
4401         }
4402         I915_WRITE(DPLL_MD(pipe), temp);
4403         POSTING_READ(DPLL_MD(pipe));
4404
4405         /* Now program lane control registers */
4406         if(intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)
4407                         || intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI))
4408         {
4409                 temp = 0x1000C4;
4410                 if(pipe == 1)
4411                         temp |= (1 << 21);
4412                 intel_dpio_write(dev_priv, DPIO_DATA_CHANNEL1, temp);
4413         }
4414         if(intel_pipe_has_type(crtc,INTEL_OUTPUT_EDP))
4415         {
4416                 temp = 0x1000C4;
4417                 if(pipe == 1)
4418                         temp |= (1 << 21);
4419                 intel_dpio_write(dev_priv, DPIO_DATA_CHANNEL2, temp);
4420         }
4421
4422         mutex_unlock(&dev_priv->dpio_lock);
4423 }
4424
4425 static void i9xx_update_pll(struct drm_crtc *crtc,
4426                             struct drm_display_mode *mode,
4427                             struct drm_display_mode *adjusted_mode,
4428                             intel_clock_t *clock, intel_clock_t *reduced_clock,
4429                             int num_connectors)
4430 {
4431         struct drm_device *dev = crtc->dev;
4432         struct drm_i915_private *dev_priv = dev->dev_private;
4433         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4434         struct intel_encoder *encoder;
4435         int pipe = intel_crtc->pipe;
4436         u32 dpll;
4437         bool is_sdvo;
4438
4439         i9xx_update_pll_dividers(crtc, clock, reduced_clock);
4440
4441         is_sdvo = intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO) ||
4442                 intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI);
4443
4444         dpll = DPLL_VGA_MODE_DIS;
4445
4446         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
4447                 dpll |= DPLLB_MODE_LVDS;
4448         else
4449                 dpll |= DPLLB_MODE_DAC_SERIAL;
4450         if (is_sdvo) {
4451                 int pixel_multiplier = intel_mode_get_pixel_multiplier(adjusted_mode);
4452                 if (pixel_multiplier > 1) {
4453                         if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
4454                                 dpll |= (pixel_multiplier - 1) << SDVO_MULTIPLIER_SHIFT_HIRES;
4455                 }
4456                 dpll |= DPLL_DVO_HIGH_SPEED;
4457         }
4458         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT))
4459                 dpll |= DPLL_DVO_HIGH_SPEED;
4460
4461         /* compute bitmask from p1 value */
4462         if (IS_PINEVIEW(dev))
4463                 dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW;
4464         else {
4465                 dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4466                 if (IS_G4X(dev) && reduced_clock)
4467                         dpll |= (1 << (reduced_clock->p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
4468         }
4469         switch (clock->p2) {
4470         case 5:
4471                 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
4472                 break;
4473         case 7:
4474                 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
4475                 break;
4476         case 10:
4477                 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
4478                 break;
4479         case 14:
4480                 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
4481                 break;
4482         }
4483         if (INTEL_INFO(dev)->gen >= 4)
4484                 dpll |= (6 << PLL_LOAD_PULSE_PHASE_SHIFT);
4485
4486         if (is_sdvo && intel_pipe_has_type(crtc, INTEL_OUTPUT_TVOUT))
4487                 dpll |= PLL_REF_INPUT_TVCLKINBC;
4488         else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_TVOUT))
4489                 /* XXX: just matching BIOS for now */
4490                 /*      dpll |= PLL_REF_INPUT_TVCLKINBC; */
4491                 dpll |= 3;
4492         else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
4493                  intel_panel_use_ssc(dev_priv) && num_connectors < 2)
4494                 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
4495         else
4496                 dpll |= PLL_REF_INPUT_DREFCLK;
4497
4498         dpll |= DPLL_VCO_ENABLE;
4499         I915_WRITE(DPLL(pipe), dpll & ~DPLL_VCO_ENABLE);
4500         POSTING_READ(DPLL(pipe));
4501         udelay(150);
4502
4503         for_each_encoder_on_crtc(dev, crtc, encoder)
4504                 if (encoder->pre_pll_enable)
4505                         encoder->pre_pll_enable(encoder);
4506
4507         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT))
4508                 intel_dp_set_m_n(crtc, mode, adjusted_mode);
4509
4510         I915_WRITE(DPLL(pipe), dpll);
4511
4512         /* Wait for the clocks to stabilize. */
4513         POSTING_READ(DPLL(pipe));
4514         udelay(150);
4515
4516         if (INTEL_INFO(dev)->gen >= 4) {
4517                 u32 temp = 0;
4518                 if (is_sdvo) {
4519                         temp = intel_mode_get_pixel_multiplier(adjusted_mode);
4520                         if (temp > 1)
4521                                 temp = (temp - 1) << DPLL_MD_UDI_MULTIPLIER_SHIFT;
4522                         else
4523                                 temp = 0;
4524                 }
4525                 I915_WRITE(DPLL_MD(pipe), temp);
4526         } else {
4527                 /* The pixel multiplier can only be updated once the
4528                  * DPLL is enabled and the clocks are stable.
4529                  *
4530                  * So write it again.
4531                  */
4532                 I915_WRITE(DPLL(pipe), dpll);
4533         }
4534 }
4535
4536 static void i8xx_update_pll(struct drm_crtc *crtc,
4537                             struct drm_display_mode *adjusted_mode,
4538                             intel_clock_t *clock, intel_clock_t *reduced_clock,
4539                             int num_connectors)
4540 {
4541         struct drm_device *dev = crtc->dev;
4542         struct drm_i915_private *dev_priv = dev->dev_private;
4543         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4544         struct intel_encoder *encoder;
4545         int pipe = intel_crtc->pipe;
4546         u32 dpll;
4547
4548         i9xx_update_pll_dividers(crtc, clock, reduced_clock);
4549
4550         dpll = DPLL_VGA_MODE_DIS;
4551
4552         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
4553                 dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4554         } else {
4555                 if (clock->p1 == 2)
4556                         dpll |= PLL_P1_DIVIDE_BY_TWO;
4557                 else
4558                         dpll |= (clock->p1 - 2) << DPLL_FPA01_P1_POST_DIV_SHIFT;
4559                 if (clock->p2 == 4)
4560                         dpll |= PLL_P2_DIVIDE_BY_4;
4561         }
4562
4563         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
4564                  intel_panel_use_ssc(dev_priv) && num_connectors < 2)
4565                 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
4566         else
4567                 dpll |= PLL_REF_INPUT_DREFCLK;
4568
4569         dpll |= DPLL_VCO_ENABLE;
4570         I915_WRITE(DPLL(pipe), dpll & ~DPLL_VCO_ENABLE);
4571         POSTING_READ(DPLL(pipe));
4572         udelay(150);
4573
4574         for_each_encoder_on_crtc(dev, crtc, encoder)
4575                 if (encoder->pre_pll_enable)
4576                         encoder->pre_pll_enable(encoder);
4577
4578         I915_WRITE(DPLL(pipe), dpll);
4579
4580         /* Wait for the clocks to stabilize. */
4581         POSTING_READ(DPLL(pipe));
4582         udelay(150);
4583
4584         /* The pixel multiplier can only be updated once the
4585          * DPLL is enabled and the clocks are stable.
4586          *
4587          * So write it again.
4588          */
4589         I915_WRITE(DPLL(pipe), dpll);
4590 }
4591
4592 static void intel_set_pipe_timings(struct intel_crtc *intel_crtc,
4593                                    struct drm_display_mode *mode,
4594                                    struct drm_display_mode *adjusted_mode)
4595 {
4596         struct drm_device *dev = intel_crtc->base.dev;
4597         struct drm_i915_private *dev_priv = dev->dev_private;
4598         enum pipe pipe = intel_crtc->pipe;
4599         enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder;
4600         uint32_t vsyncshift;
4601
4602         if (!IS_GEN2(dev) && adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
4603                 /* the chip adds 2 halflines automatically */
4604                 adjusted_mode->crtc_vtotal -= 1;
4605                 adjusted_mode->crtc_vblank_end -= 1;
4606                 vsyncshift = adjusted_mode->crtc_hsync_start
4607                              - adjusted_mode->crtc_htotal / 2;
4608         } else {
4609                 vsyncshift = 0;
4610         }
4611
4612         if (INTEL_INFO(dev)->gen > 3)
4613                 I915_WRITE(VSYNCSHIFT(cpu_transcoder), vsyncshift);
4614
4615         I915_WRITE(HTOTAL(cpu_transcoder),
4616                    (adjusted_mode->crtc_hdisplay - 1) |
4617                    ((adjusted_mode->crtc_htotal - 1) << 16));
4618         I915_WRITE(HBLANK(cpu_transcoder),
4619                    (adjusted_mode->crtc_hblank_start - 1) |
4620                    ((adjusted_mode->crtc_hblank_end - 1) << 16));
4621         I915_WRITE(HSYNC(cpu_transcoder),
4622                    (adjusted_mode->crtc_hsync_start - 1) |
4623                    ((adjusted_mode->crtc_hsync_end - 1) << 16));
4624
4625         I915_WRITE(VTOTAL(cpu_transcoder),
4626                    (adjusted_mode->crtc_vdisplay - 1) |
4627                    ((adjusted_mode->crtc_vtotal - 1) << 16));
4628         I915_WRITE(VBLANK(cpu_transcoder),
4629                    (adjusted_mode->crtc_vblank_start - 1) |
4630                    ((adjusted_mode->crtc_vblank_end - 1) << 16));
4631         I915_WRITE(VSYNC(cpu_transcoder),
4632                    (adjusted_mode->crtc_vsync_start - 1) |
4633                    ((adjusted_mode->crtc_vsync_end - 1) << 16));
4634
4635         /* Workaround: when the EDP input selection is B, the VTOTAL_B must be
4636          * programmed with the VTOTAL_EDP value. Same for VTOTAL_C. This is
4637          * documented on the DDI_FUNC_CTL register description, EDP Input Select
4638          * bits. */
4639         if (IS_HASWELL(dev) && cpu_transcoder == TRANSCODER_EDP &&
4640             (pipe == PIPE_B || pipe == PIPE_C))
4641                 I915_WRITE(VTOTAL(pipe), I915_READ(VTOTAL(cpu_transcoder)));
4642
4643         /* pipesrc controls the size that is scaled from, which should
4644          * always be the user's requested size.
4645          */
4646         I915_WRITE(PIPESRC(pipe),
4647                    ((mode->hdisplay - 1) << 16) | (mode->vdisplay - 1));
4648 }
4649
4650 static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
4651                               struct drm_display_mode *mode,
4652                               struct drm_display_mode *adjusted_mode,
4653                               int x, int y,
4654                               struct drm_framebuffer *fb)
4655 {
4656         struct drm_device *dev = crtc->dev;
4657         struct drm_i915_private *dev_priv = dev->dev_private;
4658         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4659         int pipe = intel_crtc->pipe;
4660         int plane = intel_crtc->plane;
4661         int refclk, num_connectors = 0;
4662         intel_clock_t clock, reduced_clock;
4663         u32 dspcntr, pipeconf;
4664         bool ok, has_reduced_clock = false, is_sdvo = false;
4665         bool is_lvds = false, is_tv = false, is_dp = false;
4666         struct intel_encoder *encoder;
4667         const intel_limit_t *limit;
4668         int ret;
4669
4670         for_each_encoder_on_crtc(dev, crtc, encoder) {
4671                 switch (encoder->type) {
4672                 case INTEL_OUTPUT_LVDS:
4673                         is_lvds = true;
4674                         break;
4675                 case INTEL_OUTPUT_SDVO:
4676                 case INTEL_OUTPUT_HDMI:
4677                         is_sdvo = true;
4678                         if (encoder->needs_tv_clock)
4679                                 is_tv = true;
4680                         break;
4681                 case INTEL_OUTPUT_TVOUT:
4682                         is_tv = true;
4683                         break;
4684                 case INTEL_OUTPUT_DISPLAYPORT:
4685                         is_dp = true;
4686                         break;
4687                 }
4688
4689                 num_connectors++;
4690         }
4691
4692         refclk = i9xx_get_refclk(crtc, num_connectors);
4693
4694         /*
4695          * Returns a set of divisors for the desired target clock with the given
4696          * refclk, or FALSE.  The returned values represent the clock equation:
4697          * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
4698          */
4699         limit = intel_limit(crtc, refclk);
4700         ok = limit->find_pll(limit, crtc, adjusted_mode->clock, refclk, NULL,
4701                              &clock);
4702         if (!ok) {
4703                 DRM_ERROR("Couldn't find PLL settings for mode!\n");
4704                 return -EINVAL;
4705         }
4706
4707         /* Ensure that the cursor is valid for the new mode before changing... */
4708         intel_crtc_update_cursor(crtc, true);
4709
4710         if (is_lvds && dev_priv->lvds_downclock_avail) {
4711                 /*
4712                  * Ensure we match the reduced clock's P to the target clock.
4713                  * If the clocks don't match, we can't switch the display clock
4714                  * by using the FP0/FP1. In such case we will disable the LVDS
4715                  * downclock feature.
4716                 */
4717                 has_reduced_clock = limit->find_pll(limit, crtc,
4718                                                     dev_priv->lvds_downclock,
4719                                                     refclk,
4720                                                     &clock,
4721                                                     &reduced_clock);
4722         }
4723
4724         if (is_sdvo && is_tv)
4725                 i9xx_adjust_sdvo_tv_clock(adjusted_mode, &clock);
4726
4727         if (IS_GEN2(dev))
4728                 i8xx_update_pll(crtc, adjusted_mode, &clock,
4729                                 has_reduced_clock ? &reduced_clock : NULL,
4730                                 num_connectors);
4731         else if (IS_VALLEYVIEW(dev))
4732                 vlv_update_pll(crtc, mode, adjusted_mode, &clock,
4733                                 has_reduced_clock ? &reduced_clock : NULL,
4734                                 num_connectors);
4735         else
4736                 i9xx_update_pll(crtc, mode, adjusted_mode, &clock,
4737                                 has_reduced_clock ? &reduced_clock : NULL,
4738                                 num_connectors);
4739
4740         /* setup pipeconf */
4741         pipeconf = I915_READ(PIPECONF(pipe));
4742
4743         /* Set up the display plane register */
4744         dspcntr = DISPPLANE_GAMMA_ENABLE;
4745
4746         if (pipe == 0)
4747                 dspcntr &= ~DISPPLANE_SEL_PIPE_MASK;
4748         else
4749                 dspcntr |= DISPPLANE_SEL_PIPE_B;
4750
4751         if (pipe == 0 && INTEL_INFO(dev)->gen < 4) {
4752                 /* Enable pixel doubling when the dot clock is > 90% of the (display)
4753                  * core speed.
4754                  *
4755                  * XXX: No double-wide on 915GM pipe B. Is that the only reason for the
4756                  * pipe == 0 check?
4757                  */
4758                 if (mode->clock >
4759                     dev_priv->display.get_display_clock_speed(dev) * 9 / 10)
4760                         pipeconf |= PIPECONF_DOUBLE_WIDE;
4761                 else
4762                         pipeconf &= ~PIPECONF_DOUBLE_WIDE;
4763         }
4764
4765         /* default to 8bpc */
4766         pipeconf &= ~(PIPECONF_BPC_MASK | PIPECONF_DITHER_EN);
4767         if (is_dp) {
4768                 if (adjusted_mode->private_flags & INTEL_MODE_DP_FORCE_6BPC) {
4769                         pipeconf |= PIPECONF_6BPC |
4770                                     PIPECONF_DITHER_EN |
4771                                     PIPECONF_DITHER_TYPE_SP;
4772                 }
4773         }
4774
4775         if (IS_VALLEYVIEW(dev) && intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP)) {
4776                 if (adjusted_mode->private_flags & INTEL_MODE_DP_FORCE_6BPC) {
4777                         pipeconf |= PIPECONF_6BPC |
4778                                         PIPECONF_ENABLE |
4779                                         I965_PIPECONF_ACTIVE;
4780                 }
4781         }
4782
4783         DRM_DEBUG_KMS("Mode for pipe %c:\n", pipe == 0 ? 'A' : 'B');
4784         drm_mode_debug_printmodeline(mode);
4785
4786         if (HAS_PIPE_CXSR(dev)) {
4787                 if (intel_crtc->lowfreq_avail) {
4788                         DRM_DEBUG_KMS("enabling CxSR downclocking\n");
4789                         pipeconf |= PIPECONF_CXSR_DOWNCLOCK;
4790                 } else {
4791                         DRM_DEBUG_KMS("disabling CxSR downclocking\n");
4792                         pipeconf &= ~PIPECONF_CXSR_DOWNCLOCK;
4793                 }
4794         }
4795
4796         pipeconf &= ~PIPECONF_INTERLACE_MASK;
4797         if (!IS_GEN2(dev) &&
4798             adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
4799                 pipeconf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
4800         else
4801                 pipeconf |= PIPECONF_PROGRESSIVE;
4802
4803         intel_set_pipe_timings(intel_crtc, mode, adjusted_mode);
4804
4805         /* pipesrc and dspsize control the size that is scaled from,
4806          * which should always be the user's requested size.
4807          */
4808         I915_WRITE(DSPSIZE(plane),
4809                    ((mode->vdisplay - 1) << 16) |
4810                    (mode->hdisplay - 1));
4811         I915_WRITE(DSPPOS(plane), 0);
4812
4813         I915_WRITE(PIPECONF(pipe), pipeconf);
4814         POSTING_READ(PIPECONF(pipe));
4815         intel_enable_pipe(dev_priv, pipe, false);
4816
4817         intel_wait_for_vblank(dev, pipe);
4818
4819         I915_WRITE(DSPCNTR(plane), dspcntr);
4820         POSTING_READ(DSPCNTR(plane));
4821
4822         ret = intel_pipe_set_base(crtc, x, y, fb);
4823
4824         intel_update_watermarks(dev);
4825
4826         return ret;
4827 }
4828
4829 static void ironlake_init_pch_refclk(struct drm_device *dev)
4830 {
4831         struct drm_i915_private *dev_priv = dev->dev_private;
4832         struct drm_mode_config *mode_config = &dev->mode_config;
4833         struct intel_encoder *encoder;
4834         u32 temp;
4835         bool has_lvds = false;
4836         bool has_cpu_edp = false;
4837         bool has_pch_edp = false;
4838         bool has_panel = false;
4839         bool has_ck505 = false;
4840         bool can_ssc = false;
4841
4842         /* We need to take the global config into account */
4843         list_for_each_entry(encoder, &mode_config->encoder_list,
4844                             base.head) {
4845                 switch (encoder->type) {
4846                 case INTEL_OUTPUT_LVDS:
4847                         has_panel = true;
4848                         has_lvds = true;
4849                         break;
4850                 case INTEL_OUTPUT_EDP:
4851                         has_panel = true;
4852                         if (intel_encoder_is_pch_edp(&encoder->base))
4853                                 has_pch_edp = true;
4854                         else
4855                                 has_cpu_edp = true;
4856                         break;
4857                 }
4858         }
4859
4860         if (HAS_PCH_IBX(dev)) {
4861                 has_ck505 = dev_priv->display_clock_mode;
4862                 can_ssc = has_ck505;
4863         } else {
4864                 has_ck505 = false;
4865                 can_ssc = true;
4866         }
4867
4868         DRM_DEBUG_KMS("has_panel %d has_lvds %d has_pch_edp %d has_cpu_edp %d has_ck505 %d\n",
4869                       has_panel, has_lvds, has_pch_edp, has_cpu_edp,
4870                       has_ck505);
4871
4872         /* Ironlake: try to setup display ref clock before DPLL
4873          * enabling. This is only under driver's control after
4874          * PCH B stepping, previous chipset stepping should be
4875          * ignoring this setting.
4876          */
4877         temp = I915_READ(PCH_DREF_CONTROL);
4878         /* Always enable nonspread source */
4879         temp &= ~DREF_NONSPREAD_SOURCE_MASK;
4880
4881         if (has_ck505)
4882                 temp |= DREF_NONSPREAD_CK505_ENABLE;
4883         else
4884                 temp |= DREF_NONSPREAD_SOURCE_ENABLE;
4885
4886         if (has_panel) {
4887                 temp &= ~DREF_SSC_SOURCE_MASK;
4888                 temp |= DREF_SSC_SOURCE_ENABLE;
4889
4890                 /* SSC must be turned on before enabling the CPU output  */
4891                 if (intel_panel_use_ssc(dev_priv) && can_ssc) {
4892                         DRM_DEBUG_KMS("Using SSC on panel\n");
4893                         temp |= DREF_SSC1_ENABLE;
4894                 } else
4895                         temp &= ~DREF_SSC1_ENABLE;
4896
4897                 /* Get SSC going before enabling the outputs */
4898                 I915_WRITE(PCH_DREF_CONTROL, temp);
4899                 POSTING_READ(PCH_DREF_CONTROL);
4900                 udelay(200);
4901
4902                 temp &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
4903
4904                 /* Enable CPU source on CPU attached eDP */
4905                 if (has_cpu_edp) {
4906                         if (intel_panel_use_ssc(dev_priv) && can_ssc) {
4907                                 DRM_DEBUG_KMS("Using SSC on eDP\n");
4908                                 temp |= DREF_CPU_SOURCE_OUTPUT_DOWNSPREAD;
4909                         }
4910                         else
4911                                 temp |= DREF_CPU_SOURCE_OUTPUT_NONSPREAD;
4912                 } else
4913                         temp |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
4914
4915                 I915_WRITE(PCH_DREF_CONTROL, temp);
4916                 POSTING_READ(PCH_DREF_CONTROL);
4917                 udelay(200);
4918         } else {
4919                 DRM_DEBUG_KMS("Disabling SSC entirely\n");
4920
4921                 temp &= ~DREF_CPU_SOURCE_OUTPUT_MASK;
4922
4923                 /* Turn off CPU output */
4924                 temp |= DREF_CPU_SOURCE_OUTPUT_DISABLE;
4925
4926                 I915_WRITE(PCH_DREF_CONTROL, temp);
4927                 POSTING_READ(PCH_DREF_CONTROL);
4928                 udelay(200);
4929
4930                 /* Turn off the SSC source */
4931                 temp &= ~DREF_SSC_SOURCE_MASK;
4932                 temp |= DREF_SSC_SOURCE_DISABLE;
4933
4934                 /* Turn off SSC1 */
4935                 temp &= ~ DREF_SSC1_ENABLE;
4936
4937                 I915_WRITE(PCH_DREF_CONTROL, temp);
4938                 POSTING_READ(PCH_DREF_CONTROL);
4939                 udelay(200);
4940         }
4941 }
4942
4943 /* Sequence to enable CLKOUT_DP for FDI usage and configure PCH FDI I/O. */
4944 static void lpt_init_pch_refclk(struct drm_device *dev)
4945 {
4946         struct drm_i915_private *dev_priv = dev->dev_private;
4947         struct drm_mode_config *mode_config = &dev->mode_config;
4948         struct intel_encoder *encoder;
4949         bool has_vga = false;
4950         bool is_sdv = false;
4951         u32 tmp;
4952
4953         list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
4954                 switch (encoder->type) {
4955                 case INTEL_OUTPUT_ANALOG:
4956                         has_vga = true;
4957                         break;
4958                 }
4959         }
4960
4961         if (!has_vga)
4962                 return;
4963
4964         mutex_lock(&dev_priv->dpio_lock);
4965
4966         /* XXX: Rip out SDV support once Haswell ships for real. */
4967         if (IS_HASWELL(dev) && (dev->pci_device & 0xFF00) == 0x0C00)
4968                 is_sdv = true;
4969
4970         tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
4971         tmp &= ~SBI_SSCCTL_DISABLE;
4972         tmp |= SBI_SSCCTL_PATHALT;
4973         intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
4974
4975         udelay(24);
4976
4977         tmp = intel_sbi_read(dev_priv, SBI_SSCCTL, SBI_ICLK);
4978         tmp &= ~SBI_SSCCTL_PATHALT;
4979         intel_sbi_write(dev_priv, SBI_SSCCTL, tmp, SBI_ICLK);
4980
4981         if (!is_sdv) {
4982                 tmp = I915_READ(SOUTH_CHICKEN2);
4983                 tmp |= FDI_MPHY_IOSFSB_RESET_CTL;
4984                 I915_WRITE(SOUTH_CHICKEN2, tmp);
4985
4986                 if (wait_for_atomic_us(I915_READ(SOUTH_CHICKEN2) &
4987                                        FDI_MPHY_IOSFSB_RESET_STATUS, 100))
4988                         DRM_ERROR("FDI mPHY reset assert timeout\n");
4989
4990                 tmp = I915_READ(SOUTH_CHICKEN2);
4991                 tmp &= ~FDI_MPHY_IOSFSB_RESET_CTL;
4992                 I915_WRITE(SOUTH_CHICKEN2, tmp);
4993
4994                 if (wait_for_atomic_us((I915_READ(SOUTH_CHICKEN2) &
4995                                         FDI_MPHY_IOSFSB_RESET_STATUS) == 0,
4996                                        100))
4997                         DRM_ERROR("FDI mPHY reset de-assert timeout\n");
4998         }
4999
5000         tmp = intel_sbi_read(dev_priv, 0x8008, SBI_MPHY);
5001         tmp &= ~(0xFF << 24);
5002         tmp |= (0x12 << 24);
5003         intel_sbi_write(dev_priv, 0x8008, tmp, SBI_MPHY);
5004
5005         if (!is_sdv) {
5006                 tmp = intel_sbi_read(dev_priv, 0x808C, SBI_MPHY);
5007                 tmp &= ~(0x3 << 6);
5008                 tmp |= (1 << 6) | (1 << 0);
5009                 intel_sbi_write(dev_priv, 0x808C, tmp, SBI_MPHY);
5010         }
5011
5012         if (is_sdv) {
5013                 tmp = intel_sbi_read(dev_priv, 0x800C, SBI_MPHY);
5014                 tmp |= 0x7FFF;
5015                 intel_sbi_write(dev_priv, 0x800C, tmp, SBI_MPHY);
5016         }
5017
5018         tmp = intel_sbi_read(dev_priv, 0x2008, SBI_MPHY);
5019         tmp |= (1 << 11);
5020         intel_sbi_write(dev_priv, 0x2008, tmp, SBI_MPHY);
5021
5022         tmp = intel_sbi_read(dev_priv, 0x2108, SBI_MPHY);
5023         tmp |= (1 << 11);
5024         intel_sbi_write(dev_priv, 0x2108, tmp, SBI_MPHY);
5025
5026         if (is_sdv) {
5027                 tmp = intel_sbi_read(dev_priv, 0x2038, SBI_MPHY);
5028                 tmp |= (0x3F << 24) | (0xF << 20) | (0xF << 16);
5029                 intel_sbi_write(dev_priv, 0x2038, tmp, SBI_MPHY);
5030
5031                 tmp = intel_sbi_read(dev_priv, 0x2138, SBI_MPHY);
5032                 tmp |= (0x3F << 24) | (0xF << 20) | (0xF << 16);
5033                 intel_sbi_write(dev_priv, 0x2138, tmp, SBI_MPHY);
5034
5035                 tmp = intel_sbi_read(dev_priv, 0x203C, SBI_MPHY);
5036                 tmp |= (0x3F << 8);
5037                 intel_sbi_write(dev_priv, 0x203C, tmp, SBI_MPHY);
5038
5039                 tmp = intel_sbi_read(dev_priv, 0x213C, SBI_MPHY);
5040                 tmp |= (0x3F << 8);
5041                 intel_sbi_write(dev_priv, 0x213C, tmp, SBI_MPHY);
5042         }
5043
5044         tmp = intel_sbi_read(dev_priv, 0x206C, SBI_MPHY);
5045         tmp |= (1 << 24) | (1 << 21) | (1 << 18);
5046         intel_sbi_write(dev_priv, 0x206C, tmp, SBI_MPHY);
5047
5048         tmp = intel_sbi_read(dev_priv, 0x216C, SBI_MPHY);
5049         tmp |= (1 << 24) | (1 << 21) | (1 << 18);
5050         intel_sbi_write(dev_priv, 0x216C, tmp, SBI_MPHY);
5051
5052         if (!is_sdv) {
5053                 tmp = intel_sbi_read(dev_priv, 0x2080, SBI_MPHY);
5054                 tmp &= ~(7 << 13);
5055                 tmp |= (5 << 13);
5056                 intel_sbi_write(dev_priv, 0x2080, tmp, SBI_MPHY);
5057
5058                 tmp = intel_sbi_read(dev_priv, 0x2180, SBI_MPHY);
5059                 tmp &= ~(7 << 13);
5060                 tmp |= (5 << 13);
5061                 intel_sbi_write(dev_priv, 0x2180, tmp, SBI_MPHY);
5062         }
5063
5064         tmp = intel_sbi_read(dev_priv, 0x208C, SBI_MPHY);
5065         tmp &= ~0xFF;
5066         tmp |= 0x1C;
5067         intel_sbi_write(dev_priv, 0x208C, tmp, SBI_MPHY);
5068
5069         tmp = intel_sbi_read(dev_priv, 0x218C, SBI_MPHY);
5070         tmp &= ~0xFF;
5071         tmp |= 0x1C;
5072         intel_sbi_write(dev_priv, 0x218C, tmp, SBI_MPHY);
5073
5074         tmp = intel_sbi_read(dev_priv, 0x2098, SBI_MPHY);
5075         tmp &= ~(0xFF << 16);
5076         tmp |= (0x1C << 16);
5077         intel_sbi_write(dev_priv, 0x2098, tmp, SBI_MPHY);
5078
5079         tmp = intel_sbi_read(dev_priv, 0x2198, SBI_MPHY);
5080         tmp &= ~(0xFF << 16);
5081         tmp |= (0x1C << 16);
5082         intel_sbi_write(dev_priv, 0x2198, tmp, SBI_MPHY);
5083
5084         if (!is_sdv) {
5085                 tmp = intel_sbi_read(dev_priv, 0x20C4, SBI_MPHY);
5086                 tmp |= (1 << 27);
5087                 intel_sbi_write(dev_priv, 0x20C4, tmp, SBI_MPHY);
5088
5089                 tmp = intel_sbi_read(dev_priv, 0x21C4, SBI_MPHY);
5090                 tmp |= (1 << 27);
5091                 intel_sbi_write(dev_priv, 0x21C4, tmp, SBI_MPHY);
5092
5093                 tmp = intel_sbi_read(dev_priv, 0x20EC, SBI_MPHY);
5094                 tmp &= ~(0xF << 28);
5095                 tmp |= (4 << 28);
5096                 intel_sbi_write(dev_priv, 0x20EC, tmp, SBI_MPHY);
5097
5098                 tmp = intel_sbi_read(dev_priv, 0x21EC, SBI_MPHY);
5099                 tmp &= ~(0xF << 28);
5100                 tmp |= (4 << 28);
5101                 intel_sbi_write(dev_priv, 0x21EC, tmp, SBI_MPHY);
5102         }
5103
5104         /* ULT uses SBI_GEN0, but ULT doesn't have VGA, so we don't care. */
5105         tmp = intel_sbi_read(dev_priv, SBI_DBUFF0, SBI_ICLK);
5106         tmp |= SBI_DBUFF0_ENABLE;
5107         intel_sbi_write(dev_priv, SBI_DBUFF0, tmp, SBI_ICLK);
5108
5109         mutex_unlock(&dev_priv->dpio_lock);
5110 }
5111
5112 /*
5113  * Initialize reference clocks when the driver loads
5114  */
5115 void intel_init_pch_refclk(struct drm_device *dev)
5116 {
5117         if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
5118                 ironlake_init_pch_refclk(dev);
5119         else if (HAS_PCH_LPT(dev))
5120                 lpt_init_pch_refclk(dev);
5121 }
5122
5123 static int ironlake_get_refclk(struct drm_crtc *crtc)
5124 {
5125         struct drm_device *dev = crtc->dev;
5126         struct drm_i915_private *dev_priv = dev->dev_private;
5127         struct intel_encoder *encoder;
5128         struct intel_encoder *edp_encoder = NULL;
5129         int num_connectors = 0;
5130         bool is_lvds = false;
5131
5132         for_each_encoder_on_crtc(dev, crtc, encoder) {
5133                 switch (encoder->type) {
5134                 case INTEL_OUTPUT_LVDS:
5135                         is_lvds = true;
5136                         break;
5137                 case INTEL_OUTPUT_EDP:
5138                         edp_encoder = encoder;
5139                         break;
5140                 }
5141                 num_connectors++;
5142         }
5143
5144         if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2) {
5145                 DRM_DEBUG_KMS("using SSC reference clock of %d MHz\n",
5146                               dev_priv->lvds_ssc_freq);
5147                 return dev_priv->lvds_ssc_freq * 1000;
5148         }
5149
5150         return 120000;
5151 }
5152
5153 static void ironlake_set_pipeconf(struct drm_crtc *crtc,
5154                                   struct drm_display_mode *adjusted_mode,
5155                                   bool dither)
5156 {
5157         struct drm_i915_private *dev_priv = crtc->dev->dev_private;
5158         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5159         int pipe = intel_crtc->pipe;
5160         uint32_t val;
5161
5162         val = I915_READ(PIPECONF(pipe));
5163
5164         val &= ~PIPECONF_BPC_MASK;
5165         switch (intel_crtc->bpp) {
5166         case 18:
5167                 val |= PIPECONF_6BPC;
5168                 break;
5169         case 24:
5170                 val |= PIPECONF_8BPC;
5171                 break;
5172         case 30:
5173                 val |= PIPECONF_10BPC;
5174                 break;
5175         case 36:
5176                 val |= PIPECONF_12BPC;
5177                 break;
5178         default:
5179                 /* Case prevented by intel_choose_pipe_bpp_dither. */
5180                 BUG();
5181         }
5182
5183         val &= ~(PIPECONF_DITHER_EN | PIPECONF_DITHER_TYPE_MASK);
5184         if (dither)
5185                 val |= (PIPECONF_DITHER_EN | PIPECONF_DITHER_TYPE_SP);
5186
5187         val &= ~PIPECONF_INTERLACE_MASK;
5188         if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
5189                 val |= PIPECONF_INTERLACED_ILK;
5190         else
5191                 val |= PIPECONF_PROGRESSIVE;
5192
5193         if (adjusted_mode->private_flags & INTEL_MODE_LIMITED_COLOR_RANGE)
5194                 val |= PIPECONF_COLOR_RANGE_SELECT;
5195         else
5196                 val &= ~PIPECONF_COLOR_RANGE_SELECT;
5197
5198         I915_WRITE(PIPECONF(pipe), val);
5199         POSTING_READ(PIPECONF(pipe));
5200 }
5201
5202 /*
5203  * Set up the pipe CSC unit.
5204  *
5205  * Currently only full range RGB to limited range RGB conversion
5206  * is supported, but eventually this should handle various
5207  * RGB<->YCbCr scenarios as well.
5208  */
5209 static void intel_set_pipe_csc(struct drm_crtc *crtc,
5210                                const struct drm_display_mode *adjusted_mode)
5211 {
5212         struct drm_device *dev = crtc->dev;
5213         struct drm_i915_private *dev_priv = dev->dev_private;
5214         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5215         int pipe = intel_crtc->pipe;
5216         uint16_t coeff = 0x7800; /* 1.0 */
5217
5218         /*
5219          * TODO: Check what kind of values actually come out of the pipe
5220          * with these coeff/postoff values and adjust to get the best
5221          * accuracy. Perhaps we even need to take the bpc value into
5222          * consideration.
5223          */
5224
5225         if (adjusted_mode->private_flags & INTEL_MODE_LIMITED_COLOR_RANGE)
5226                 coeff = ((235 - 16) * (1 << 12) / 255) & 0xff8; /* 0.xxx... */
5227
5228         /*
5229          * GY/GU and RY/RU should be the other way around according
5230          * to BSpec, but reality doesn't agree. Just set them up in
5231          * a way that results in the correct picture.
5232          */
5233         I915_WRITE(PIPE_CSC_COEFF_RY_GY(pipe), coeff << 16);
5234         I915_WRITE(PIPE_CSC_COEFF_BY(pipe), 0);
5235
5236         I915_WRITE(PIPE_CSC_COEFF_RU_GU(pipe), coeff);
5237         I915_WRITE(PIPE_CSC_COEFF_BU(pipe), 0);
5238
5239         I915_WRITE(PIPE_CSC_COEFF_RV_GV(pipe), 0);
5240         I915_WRITE(PIPE_CSC_COEFF_BV(pipe), coeff << 16);
5241
5242         I915_WRITE(PIPE_CSC_PREOFF_HI(pipe), 0);
5243         I915_WRITE(PIPE_CSC_PREOFF_ME(pipe), 0);
5244         I915_WRITE(PIPE_CSC_PREOFF_LO(pipe), 0);
5245
5246         if (INTEL_INFO(dev)->gen > 6) {
5247                 uint16_t postoff = 0;
5248
5249                 if (adjusted_mode->private_flags & INTEL_MODE_LIMITED_COLOR_RANGE)
5250                         postoff = (16 * (1 << 13) / 255) & 0x1fff;
5251
5252                 I915_WRITE(PIPE_CSC_POSTOFF_HI(pipe), postoff);
5253                 I915_WRITE(PIPE_CSC_POSTOFF_ME(pipe), postoff);
5254                 I915_WRITE(PIPE_CSC_POSTOFF_LO(pipe), postoff);
5255
5256                 I915_WRITE(PIPE_CSC_MODE(pipe), 0);
5257         } else {
5258                 uint32_t mode = CSC_MODE_YUV_TO_RGB;
5259
5260                 if (adjusted_mode->private_flags & INTEL_MODE_LIMITED_COLOR_RANGE)
5261                         mode |= CSC_BLACK_SCREEN_OFFSET;
5262
5263                 I915_WRITE(PIPE_CSC_MODE(pipe), mode);
5264         }
5265 }
5266
5267 static void haswell_set_pipeconf(struct drm_crtc *crtc,
5268                                  struct drm_display_mode *adjusted_mode,
5269                                  bool dither)
5270 {
5271         struct drm_i915_private *dev_priv = crtc->dev->dev_private;
5272         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5273         enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder;
5274         uint32_t val;
5275
5276         val = I915_READ(PIPECONF(cpu_transcoder));
5277
5278         val &= ~(PIPECONF_DITHER_EN | PIPECONF_DITHER_TYPE_MASK);
5279         if (dither)
5280                 val |= (PIPECONF_DITHER_EN | PIPECONF_DITHER_TYPE_SP);
5281
5282         val &= ~PIPECONF_INTERLACE_MASK_HSW;
5283         if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
5284                 val |= PIPECONF_INTERLACED_ILK;
5285         else
5286                 val |= PIPECONF_PROGRESSIVE;
5287
5288         I915_WRITE(PIPECONF(cpu_transcoder), val);
5289         POSTING_READ(PIPECONF(cpu_transcoder));
5290 }
5291
5292 static bool ironlake_compute_clocks(struct drm_crtc *crtc,
5293                                     struct drm_display_mode *adjusted_mode,
5294                                     intel_clock_t *clock,
5295                                     bool *has_reduced_clock,
5296                                     intel_clock_t *reduced_clock)
5297 {
5298         struct drm_device *dev = crtc->dev;
5299         struct drm_i915_private *dev_priv = dev->dev_private;
5300         struct intel_encoder *intel_encoder;
5301         int refclk;
5302         const intel_limit_t *limit;
5303         bool ret, is_sdvo = false, is_tv = false, is_lvds = false;
5304
5305         for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
5306                 switch (intel_encoder->type) {
5307                 case INTEL_OUTPUT_LVDS:
5308                         is_lvds = true;
5309                         break;
5310                 case INTEL_OUTPUT_SDVO:
5311                 case INTEL_OUTPUT_HDMI:
5312                         is_sdvo = true;
5313                         if (intel_encoder->needs_tv_clock)
5314                                 is_tv = true;
5315                         break;
5316                 case INTEL_OUTPUT_TVOUT:
5317                         is_tv = true;
5318                         break;
5319                 }
5320         }
5321
5322         refclk = ironlake_get_refclk(crtc);
5323
5324         /*
5325          * Returns a set of divisors for the desired target clock with the given
5326          * refclk, or FALSE.  The returned values represent the clock equation:
5327          * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
5328          */
5329         limit = intel_limit(crtc, refclk);
5330         ret = limit->find_pll(limit, crtc, adjusted_mode->clock, refclk, NULL,
5331                               clock);
5332         if (!ret)
5333                 return false;
5334
5335         if (is_lvds && dev_priv->lvds_downclock_avail) {
5336                 /*
5337                  * Ensure we match the reduced clock's P to the target clock.
5338                  * If the clocks don't match, we can't switch the display clock
5339                  * by using the FP0/FP1. In such case we will disable the LVDS
5340                  * downclock feature.
5341                 */
5342                 *has_reduced_clock = limit->find_pll(limit, crtc,
5343                                                      dev_priv->lvds_downclock,
5344                                                      refclk,
5345                                                      clock,
5346                                                      reduced_clock);
5347         }
5348
5349         if (is_sdvo && is_tv)
5350                 i9xx_adjust_sdvo_tv_clock(adjusted_mode, clock);
5351
5352         return true;
5353 }
5354
5355 static void cpt_enable_fdi_bc_bifurcation(struct drm_device *dev)
5356 {
5357         struct drm_i915_private *dev_priv = dev->dev_private;
5358         uint32_t temp;
5359
5360         temp = I915_READ(SOUTH_CHICKEN1);
5361         if (temp & FDI_BC_BIFURCATION_SELECT)
5362                 return;
5363
5364         WARN_ON(I915_READ(FDI_RX_CTL(PIPE_B)) & FDI_RX_ENABLE);
5365         WARN_ON(I915_READ(FDI_RX_CTL(PIPE_C)) & FDI_RX_ENABLE);
5366
5367         temp |= FDI_BC_BIFURCATION_SELECT;
5368         DRM_DEBUG_KMS("enabling fdi C rx\n");
5369         I915_WRITE(SOUTH_CHICKEN1, temp);
5370         POSTING_READ(SOUTH_CHICKEN1);
5371 }
5372
5373 static bool ironlake_check_fdi_lanes(struct intel_crtc *intel_crtc)
5374 {
5375         struct drm_device *dev = intel_crtc->base.dev;
5376         struct drm_i915_private *dev_priv = dev->dev_private;
5377         struct intel_crtc *pipe_B_crtc =
5378                 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[PIPE_B]);
5379
5380         DRM_DEBUG_KMS("checking fdi config on pipe %i, lanes %i\n",
5381                       intel_crtc->pipe, intel_crtc->fdi_lanes);
5382         if (intel_crtc->fdi_lanes > 4) {
5383                 DRM_DEBUG_KMS("invalid fdi lane config on pipe %i: %i lanes\n",
5384                               intel_crtc->pipe, intel_crtc->fdi_lanes);
5385                 /* Clamp lanes to avoid programming the hw with bogus values. */
5386                 intel_crtc->fdi_lanes = 4;
5387
5388                 return false;
5389         }
5390
5391         if (dev_priv->num_pipe == 2)
5392                 return true;
5393
5394         switch (intel_crtc->pipe) {
5395         case PIPE_A:
5396                 return true;
5397         case PIPE_B:
5398                 if (dev_priv->pipe_to_crtc_mapping[PIPE_C]->enabled &&
5399                     intel_crtc->fdi_lanes > 2) {
5400                         DRM_DEBUG_KMS("invalid shared fdi lane config on pipe %i: %i lanes\n",
5401                                       intel_crtc->pipe, intel_crtc->fdi_lanes);
5402                         /* Clamp lanes to avoid programming the hw with bogus values. */
5403                         intel_crtc->fdi_lanes = 2;
5404
5405                         return false;
5406                 }
5407
5408                 if (intel_crtc->fdi_lanes > 2)
5409                         WARN_ON(I915_READ(SOUTH_CHICKEN1) & FDI_BC_BIFURCATION_SELECT);
5410                 else
5411                         cpt_enable_fdi_bc_bifurcation(dev);
5412
5413                 return true;
5414         case PIPE_C:
5415                 if (!pipe_B_crtc->base.enabled || pipe_B_crtc->fdi_lanes <= 2) {
5416                         if (intel_crtc->fdi_lanes > 2) {
5417                                 DRM_DEBUG_KMS("invalid shared fdi lane config on pipe %i: %i lanes\n",
5418                                               intel_crtc->pipe, intel_crtc->fdi_lanes);
5419                                 /* Clamp lanes to avoid programming the hw with bogus values. */
5420                                 intel_crtc->fdi_lanes = 2;
5421
5422                                 return false;
5423                         }
5424                 } else {
5425                         DRM_DEBUG_KMS("fdi link B uses too many lanes to enable link C\n");
5426                         return false;
5427                 }
5428
5429                 cpt_enable_fdi_bc_bifurcation(dev);
5430
5431                 return true;
5432         default:
5433                 BUG();
5434         }
5435 }
5436
5437 int ironlake_get_lanes_required(int target_clock, int link_bw, int bpp)
5438 {
5439         /*
5440          * Account for spread spectrum to avoid
5441          * oversubscribing the link. Max center spread
5442          * is 2.5%; use 5% for safety's sake.
5443          */
5444         u32 bps = target_clock * bpp * 21 / 20;
5445         return bps / (link_bw * 8) + 1;
5446 }
5447
5448 static void ironlake_set_m_n(struct drm_crtc *crtc,
5449                              struct drm_display_mode *mode,
5450                              struct drm_display_mode *adjusted_mode)
5451 {
5452         struct drm_device *dev = crtc->dev;
5453         struct drm_i915_private *dev_priv = dev->dev_private;
5454         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5455         enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder;
5456         struct intel_encoder *intel_encoder, *edp_encoder = NULL;
5457         struct intel_link_m_n m_n = {0};
5458         int target_clock, pixel_multiplier, lane, link_bw;
5459         bool is_dp = false, is_cpu_edp = false;
5460
5461         for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
5462                 switch (intel_encoder->type) {
5463                 case INTEL_OUTPUT_DISPLAYPORT:
5464                         is_dp = true;
5465                         break;
5466                 case INTEL_OUTPUT_EDP:
5467                         is_dp = true;
5468                         if (!intel_encoder_is_pch_edp(&intel_encoder->base))
5469                                 is_cpu_edp = true;
5470                         edp_encoder = intel_encoder;
5471                         break;
5472                 }
5473         }
5474
5475         /* FDI link */
5476         pixel_multiplier = intel_mode_get_pixel_multiplier(adjusted_mode);
5477         lane = 0;
5478         /* CPU eDP doesn't require FDI link, so just set DP M/N
5479            according to current link config */
5480         if (is_cpu_edp) {
5481                 intel_edp_link_config(edp_encoder, &lane, &link_bw);
5482         } else {
5483                 /* FDI is a binary signal running at ~2.7GHz, encoding
5484                  * each output octet as 10 bits. The actual frequency
5485                  * is stored as a divider into a 100MHz clock, and the
5486                  * mode pixel clock is stored in units of 1KHz.
5487                  * Hence the bw of each lane in terms of the mode signal
5488                  * is:
5489                  */
5490                 link_bw = intel_fdi_link_freq(dev) * MHz(100)/KHz(1)/10;
5491         }
5492
5493         /* [e]DP over FDI requires target mode clock instead of link clock. */
5494         if (edp_encoder)
5495                 target_clock = intel_edp_target_clock(edp_encoder, mode);
5496         else if (is_dp)
5497                 target_clock = mode->clock;
5498         else
5499                 target_clock = adjusted_mode->clock;
5500
5501         if (!lane)
5502                 lane = ironlake_get_lanes_required(target_clock, link_bw,
5503                                                    intel_crtc->bpp);
5504
5505         intel_crtc->fdi_lanes = lane;
5506
5507         if (pixel_multiplier > 1)
5508                 link_bw *= pixel_multiplier;
5509         intel_link_compute_m_n(intel_crtc->bpp, lane, target_clock, link_bw, &m_n);
5510
5511         I915_WRITE(PIPE_DATA_M1(cpu_transcoder), TU_SIZE(m_n.tu) | m_n.gmch_m);
5512         I915_WRITE(PIPE_DATA_N1(cpu_transcoder), m_n.gmch_n);
5513         I915_WRITE(PIPE_LINK_M1(cpu_transcoder), m_n.link_m);
5514         I915_WRITE(PIPE_LINK_N1(cpu_transcoder), m_n.link_n);
5515 }
5516
5517 static uint32_t ironlake_compute_dpll(struct intel_crtc *intel_crtc,
5518                                       struct drm_display_mode *adjusted_mode,
5519                                       intel_clock_t *clock, u32 fp)
5520 {
5521         struct drm_crtc *crtc = &intel_crtc->base;
5522         struct drm_device *dev = crtc->dev;
5523         struct drm_i915_private *dev_priv = dev->dev_private;
5524         struct intel_encoder *intel_encoder;
5525         uint32_t dpll;
5526         int factor, pixel_multiplier, num_connectors = 0;
5527         bool is_lvds = false, is_sdvo = false, is_tv = false;
5528         bool is_dp = false, is_cpu_edp = false;
5529
5530         for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
5531                 switch (intel_encoder->type) {
5532                 case INTEL_OUTPUT_LVDS:
5533                         is_lvds = true;
5534                         break;
5535                 case INTEL_OUTPUT_SDVO:
5536                 case INTEL_OUTPUT_HDMI:
5537                         is_sdvo = true;
5538                         if (intel_encoder->needs_tv_clock)
5539                                 is_tv = true;
5540                         break;
5541                 case INTEL_OUTPUT_TVOUT:
5542                         is_tv = true;
5543                         break;
5544                 case INTEL_OUTPUT_DISPLAYPORT:
5545                         is_dp = true;
5546                         break;
5547                 case INTEL_OUTPUT_EDP:
5548                         is_dp = true;
5549                         if (!intel_encoder_is_pch_edp(&intel_encoder->base))
5550                                 is_cpu_edp = true;
5551                         break;
5552                 }
5553
5554                 num_connectors++;
5555         }
5556
5557         /* Enable autotuning of the PLL clock (if permissible) */
5558         factor = 21;
5559         if (is_lvds) {
5560                 if ((intel_panel_use_ssc(dev_priv) &&
5561                      dev_priv->lvds_ssc_freq == 100) ||
5562                     intel_is_dual_link_lvds(dev))
5563                         factor = 25;
5564         } else if (is_sdvo && is_tv)
5565                 factor = 20;
5566
5567         if (clock->m < factor * clock->n)
5568                 fp |= FP_CB_TUNE;
5569
5570         dpll = 0;
5571
5572         if (is_lvds)
5573                 dpll |= DPLLB_MODE_LVDS;
5574         else
5575                 dpll |= DPLLB_MODE_DAC_SERIAL;
5576         if (is_sdvo) {
5577                 pixel_multiplier = intel_mode_get_pixel_multiplier(adjusted_mode);
5578                 if (pixel_multiplier > 1) {
5579                         dpll |= (pixel_multiplier - 1) << PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT;
5580                 }
5581                 dpll |= DPLL_DVO_HIGH_SPEED;
5582         }
5583         if (is_dp && !is_cpu_edp)
5584                 dpll |= DPLL_DVO_HIGH_SPEED;
5585
5586         /* compute bitmask from p1 value */
5587         dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
5588         /* also FPA1 */
5589         dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
5590
5591         switch (clock->p2) {
5592         case 5:
5593                 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
5594                 break;
5595         case 7:
5596                 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
5597                 break;
5598         case 10:
5599                 dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
5600                 break;
5601         case 14:
5602                 dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
5603                 break;
5604         }
5605
5606         if (is_sdvo && is_tv)
5607                 dpll |= PLL_REF_INPUT_TVCLKINBC;
5608         else if (is_tv)
5609                 /* XXX: just matching BIOS for now */
5610                 /*      dpll |= PLL_REF_INPUT_TVCLKINBC; */
5611                 dpll |= 3;
5612         else if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2)
5613                 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
5614         else
5615                 dpll |= PLL_REF_INPUT_DREFCLK;
5616
5617         return dpll;
5618 }
5619
5620 static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
5621                                   struct drm_display_mode *mode,
5622                                   struct drm_display_mode *adjusted_mode,
5623                                   int x, int y,
5624                                   struct drm_framebuffer *fb)
5625 {
5626         struct drm_device *dev = crtc->dev;
5627         struct drm_i915_private *dev_priv = dev->dev_private;
5628         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5629         int pipe = intel_crtc->pipe;
5630         int plane = intel_crtc->plane;
5631         int num_connectors = 0;
5632         intel_clock_t clock, reduced_clock;
5633         u32 dpll, fp = 0, fp2 = 0;
5634         bool ok, has_reduced_clock = false;
5635         bool is_lvds = false, is_dp = false, is_cpu_edp = false;
5636         struct intel_encoder *encoder;
5637         int ret;
5638         bool dither, fdi_config_ok;
5639
5640         for_each_encoder_on_crtc(dev, crtc, encoder) {
5641                 switch (encoder->type) {
5642                 case INTEL_OUTPUT_LVDS:
5643                         is_lvds = true;
5644                         break;
5645                 case INTEL_OUTPUT_DISPLAYPORT:
5646                         is_dp = true;
5647                         break;
5648                 case INTEL_OUTPUT_EDP:
5649                         is_dp = true;
5650                         if (!intel_encoder_is_pch_edp(&encoder->base))
5651                                 is_cpu_edp = true;
5652                         break;
5653                 }
5654
5655                 num_connectors++;
5656         }
5657
5658         WARN(!(HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)),
5659              "Unexpected PCH type %d\n", INTEL_PCH_TYPE(dev));
5660
5661         ok = ironlake_compute_clocks(crtc, adjusted_mode, &clock,
5662                                      &has_reduced_clock, &reduced_clock);
5663         if (!ok) {
5664                 DRM_ERROR("Couldn't find PLL settings for mode!\n");
5665                 return -EINVAL;
5666         }
5667
5668         /* Ensure that the cursor is valid for the new mode before changing... */
5669         intel_crtc_update_cursor(crtc, true);
5670
5671         /* determine panel color depth */
5672         dither = intel_choose_pipe_bpp_dither(crtc, fb, &intel_crtc->bpp,
5673                                               adjusted_mode);
5674         if (is_lvds && dev_priv->lvds_dither)
5675                 dither = true;
5676
5677         fp = clock.n << 16 | clock.m1 << 8 | clock.m2;
5678         if (has_reduced_clock)
5679                 fp2 = reduced_clock.n << 16 | reduced_clock.m1 << 8 |
5680                         reduced_clock.m2;
5681
5682         dpll = ironlake_compute_dpll(intel_crtc, adjusted_mode, &clock, fp);
5683
5684         DRM_DEBUG_KMS("Mode for pipe %d:\n", pipe);
5685         drm_mode_debug_printmodeline(mode);
5686
5687         /* CPU eDP is the only output that doesn't need a PCH PLL of its own. */
5688         if (!is_cpu_edp) {
5689                 struct intel_pch_pll *pll;
5690
5691                 pll = intel_get_pch_pll(intel_crtc, dpll, fp);
5692                 if (pll == NULL) {
5693                         DRM_DEBUG_DRIVER("failed to find PLL for pipe %d\n",
5694                                          pipe);
5695                         return -EINVAL;
5696                 }
5697         } else
5698                 intel_put_pch_pll(intel_crtc);
5699
5700         if (is_dp && !is_cpu_edp)
5701                 intel_dp_set_m_n(crtc, mode, adjusted_mode);
5702
5703         for_each_encoder_on_crtc(dev, crtc, encoder)
5704                 if (encoder->pre_pll_enable)
5705                         encoder->pre_pll_enable(encoder);
5706
5707         if (intel_crtc->pch_pll) {
5708                 I915_WRITE(intel_crtc->pch_pll->pll_reg, dpll);
5709
5710                 /* Wait for the clocks to stabilize. */
5711                 POSTING_READ(intel_crtc->pch_pll->pll_reg);
5712                 udelay(150);
5713
5714                 /* The pixel multiplier can only be updated once the
5715                  * DPLL is enabled and the clocks are stable.
5716                  *
5717                  * So write it again.
5718                  */
5719                 I915_WRITE(intel_crtc->pch_pll->pll_reg, dpll);
5720         }
5721
5722         intel_crtc->lowfreq_avail = false;
5723         if (intel_crtc->pch_pll) {
5724                 if (is_lvds && has_reduced_clock && i915_powersave) {
5725                         I915_WRITE(intel_crtc->pch_pll->fp1_reg, fp2);
5726                         intel_crtc->lowfreq_avail = true;
5727                 } else {
5728                         I915_WRITE(intel_crtc->pch_pll->fp1_reg, fp);
5729                 }
5730         }
5731
5732         intel_set_pipe_timings(intel_crtc, mode, adjusted_mode);
5733
5734         /* Note, this also computes intel_crtc->fdi_lanes which is used below in
5735          * ironlake_check_fdi_lanes. */
5736         ironlake_set_m_n(crtc, mode, adjusted_mode);
5737
5738         fdi_config_ok = ironlake_check_fdi_lanes(intel_crtc);
5739
5740         ironlake_set_pipeconf(crtc, adjusted_mode, dither);
5741
5742         intel_wait_for_vblank(dev, pipe);
5743
5744         /* Set up the display plane register */
5745         I915_WRITE(DSPCNTR(plane), DISPPLANE_GAMMA_ENABLE);
5746         POSTING_READ(DSPCNTR(plane));
5747
5748         ret = intel_pipe_set_base(crtc, x, y, fb);
5749
5750         intel_update_watermarks(dev);
5751
5752         intel_update_linetime_watermarks(dev, pipe, adjusted_mode);
5753
5754         return fdi_config_ok ? ret : -EINVAL;
5755 }
5756
5757 static void haswell_modeset_global_resources(struct drm_device *dev)
5758 {
5759         struct drm_i915_private *dev_priv = dev->dev_private;
5760         bool enable = false;
5761         struct intel_crtc *crtc;
5762         struct intel_encoder *encoder;
5763
5764         list_for_each_entry(crtc, &dev->mode_config.crtc_list, base.head) {
5765                 if (crtc->pipe != PIPE_A && crtc->base.enabled)
5766                         enable = true;
5767                 /* XXX: Should check for edp transcoder here, but thanks to init
5768                  * sequence that's not yet available. Just in case desktop eDP
5769                  * on PORT D is possible on haswell, too. */
5770         }
5771
5772         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
5773                             base.head) {
5774                 if (encoder->type != INTEL_OUTPUT_EDP &&
5775                     encoder->connectors_active)
5776                         enable = true;
5777         }
5778
5779         /* Even the eDP panel fitter is outside the always-on well. */
5780         if (dev_priv->pch_pf_size)
5781                 enable = true;
5782
5783         intel_set_power_well(dev, enable);
5784 }
5785
5786 static int haswell_crtc_mode_set(struct drm_crtc *crtc,
5787                                  struct drm_display_mode *mode,
5788                                  struct drm_display_mode *adjusted_mode,
5789                                  int x, int y,
5790                                  struct drm_framebuffer *fb)
5791 {
5792         struct drm_device *dev = crtc->dev;
5793         struct drm_i915_private *dev_priv = dev->dev_private;
5794         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5795         int pipe = intel_crtc->pipe;
5796         int plane = intel_crtc->plane;
5797         int num_connectors = 0;
5798         bool is_dp = false, is_cpu_edp = false;
5799         struct intel_encoder *encoder;
5800         int ret;
5801         bool dither;
5802
5803         for_each_encoder_on_crtc(dev, crtc, encoder) {
5804                 switch (encoder->type) {
5805                 case INTEL_OUTPUT_DISPLAYPORT:
5806                         is_dp = true;
5807                         break;
5808                 case INTEL_OUTPUT_EDP:
5809                         is_dp = true;
5810                         if (!intel_encoder_is_pch_edp(&encoder->base))
5811                                 is_cpu_edp = true;
5812                         break;
5813                 }
5814
5815                 num_connectors++;
5816         }
5817
5818         /* We are not sure yet this won't happen. */
5819         WARN(!HAS_PCH_LPT(dev), "Unexpected PCH type %d\n",
5820              INTEL_PCH_TYPE(dev));
5821
5822         WARN(num_connectors != 1, "%d connectors attached to pipe %c\n",
5823              num_connectors, pipe_name(pipe));
5824
5825         WARN_ON(I915_READ(PIPECONF(intel_crtc->cpu_transcoder)) &
5826                 (PIPECONF_ENABLE | I965_PIPECONF_ACTIVE));
5827
5828         WARN_ON(I915_READ(DSPCNTR(plane)) & DISPLAY_PLANE_ENABLE);
5829
5830         if (!intel_ddi_pll_mode_set(crtc, adjusted_mode->clock))
5831                 return -EINVAL;
5832
5833         /* Ensure that the cursor is valid for the new mode before changing... */
5834         intel_crtc_update_cursor(crtc, true);
5835
5836         /* determine panel color depth */
5837         dither = intel_choose_pipe_bpp_dither(crtc, fb, &intel_crtc->bpp,
5838                                               adjusted_mode);
5839
5840         DRM_DEBUG_KMS("Mode for pipe %d:\n", pipe);
5841         drm_mode_debug_printmodeline(mode);
5842
5843         if (is_dp && !is_cpu_edp)
5844                 intel_dp_set_m_n(crtc, mode, adjusted_mode);
5845
5846         intel_crtc->lowfreq_avail = false;
5847
5848         intel_set_pipe_timings(intel_crtc, mode, adjusted_mode);
5849
5850         if (!is_dp || is_cpu_edp)
5851                 ironlake_set_m_n(crtc, mode, adjusted_mode);
5852
5853         haswell_set_pipeconf(crtc, adjusted_mode, dither);
5854
5855         intel_set_pipe_csc(crtc, adjusted_mode);
5856
5857         /* Set up the display plane register */
5858         I915_WRITE(DSPCNTR(plane), DISPPLANE_GAMMA_ENABLE | DISPPLANE_PIPE_CSC_ENABLE);
5859         POSTING_READ(DSPCNTR(plane));
5860
5861         ret = intel_pipe_set_base(crtc, x, y, fb);
5862
5863         intel_update_watermarks(dev);
5864
5865         intel_update_linetime_watermarks(dev, pipe, adjusted_mode);
5866
5867         return ret;
5868 }
5869
5870 static int intel_crtc_mode_set(struct drm_crtc *crtc,
5871                                struct drm_display_mode *mode,
5872                                struct drm_display_mode *adjusted_mode,
5873                                int x, int y,
5874                                struct drm_framebuffer *fb)
5875 {
5876         struct drm_device *dev = crtc->dev;
5877         struct drm_i915_private *dev_priv = dev->dev_private;
5878         struct drm_encoder_helper_funcs *encoder_funcs;
5879         struct intel_encoder *encoder;
5880         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5881         int pipe = intel_crtc->pipe;
5882         int ret;
5883
5884         if (IS_HASWELL(dev) && intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))
5885                 intel_crtc->cpu_transcoder = TRANSCODER_EDP;
5886         else
5887                 intel_crtc->cpu_transcoder = pipe;
5888
5889         drm_vblank_pre_modeset(dev, pipe);
5890
5891         ret = dev_priv->display.crtc_mode_set(crtc, mode, adjusted_mode,
5892                                               x, y, fb);
5893         drm_vblank_post_modeset(dev, pipe);
5894
5895         if (ret != 0)
5896                 return ret;
5897
5898         for_each_encoder_on_crtc(dev, crtc, encoder) {
5899                 DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
5900                         encoder->base.base.id,
5901                         drm_get_encoder_name(&encoder->base),
5902                         mode->base.id, mode->name);
5903                 encoder_funcs = encoder->base.helper_private;
5904                 encoder_funcs->mode_set(&encoder->base, mode, adjusted_mode);
5905         }
5906
5907         return 0;
5908 }
5909
5910 static bool intel_eld_uptodate(struct drm_connector *connector,
5911                                int reg_eldv, uint32_t bits_eldv,
5912                                int reg_elda, uint32_t bits_elda,
5913                                int reg_edid)
5914 {
5915         struct drm_i915_private *dev_priv = connector->dev->dev_private;
5916         uint8_t *eld = connector->eld;
5917         uint32_t i;
5918
5919         i = I915_READ(reg_eldv);
5920         i &= bits_eldv;
5921
5922         if (!eld[0])
5923                 return !i;
5924
5925         if (!i)
5926                 return false;
5927
5928         i = I915_READ(reg_elda);
5929         i &= ~bits_elda;
5930         I915_WRITE(reg_elda, i);
5931
5932         for (i = 0; i < eld[2]; i++)
5933                 if (I915_READ(reg_edid) != *((uint32_t *)eld + i))
5934                         return false;
5935
5936         return true;
5937 }
5938
5939 static void g4x_write_eld(struct drm_connector *connector,
5940                           struct drm_crtc *crtc)
5941 {
5942         struct drm_i915_private *dev_priv = connector->dev->dev_private;
5943         uint8_t *eld = connector->eld;
5944         uint32_t eldv;
5945         uint32_t len;
5946         uint32_t i;
5947
5948         i = I915_READ(G4X_AUD_VID_DID);
5949
5950         if (i == INTEL_AUDIO_DEVBLC || i == INTEL_AUDIO_DEVCL)
5951                 eldv = G4X_ELDV_DEVCL_DEVBLC;
5952         else
5953                 eldv = G4X_ELDV_DEVCTG;
5954
5955         if (intel_eld_uptodate(connector,
5956                                G4X_AUD_CNTL_ST, eldv,
5957                                G4X_AUD_CNTL_ST, G4X_ELD_ADDR,
5958                                G4X_HDMIW_HDMIEDID))
5959                 return;
5960
5961         i = I915_READ(G4X_AUD_CNTL_ST);
5962         i &= ~(eldv | G4X_ELD_ADDR);
5963         len = (i >> 9) & 0x1f;          /* ELD buffer size */
5964         I915_WRITE(G4X_AUD_CNTL_ST, i);
5965
5966         if (!eld[0])
5967                 return;
5968
5969         len = min_t(uint8_t, eld[2], len);
5970         DRM_DEBUG_DRIVER("ELD size %d\n", len);
5971         for (i = 0; i < len; i++)
5972                 I915_WRITE(G4X_HDMIW_HDMIEDID, *((uint32_t *)eld + i));
5973
5974         i = I915_READ(G4X_AUD_CNTL_ST);
5975         i |= eldv;
5976         I915_WRITE(G4X_AUD_CNTL_ST, i);
5977 }
5978
5979 static void haswell_write_eld(struct drm_connector *connector,
5980                                      struct drm_crtc *crtc)
5981 {
5982         struct drm_i915_private *dev_priv = connector->dev->dev_private;
5983         uint8_t *eld = connector->eld;
5984         struct drm_device *dev = crtc->dev;
5985         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5986         uint32_t eldv;
5987         uint32_t i;
5988         int len;
5989         int pipe = to_intel_crtc(crtc)->pipe;
5990         int tmp;
5991
5992         int hdmiw_hdmiedid = HSW_AUD_EDID_DATA(pipe);
5993         int aud_cntl_st = HSW_AUD_DIP_ELD_CTRL(pipe);
5994         int aud_config = HSW_AUD_CFG(pipe);
5995         int aud_cntrl_st2 = HSW_AUD_PIN_ELD_CP_VLD;
5996
5997
5998         DRM_DEBUG_DRIVER("HDMI: Haswell Audio initialize....\n");
5999
6000         /* Audio output enable */
6001         DRM_DEBUG_DRIVER("HDMI audio: enable codec\n");
6002         tmp = I915_READ(aud_cntrl_st2);
6003         tmp |= (AUDIO_OUTPUT_ENABLE_A << (pipe * 4));
6004         I915_WRITE(aud_cntrl_st2, tmp);
6005
6006         /* Wait for 1 vertical blank */
6007         intel_wait_for_vblank(dev, pipe);
6008
6009         /* Set ELD valid state */
6010         tmp = I915_READ(aud_cntrl_st2);
6011         DRM_DEBUG_DRIVER("HDMI audio: pin eld vld status=0x%8x\n", tmp);
6012         tmp |= (AUDIO_ELD_VALID_A << (pipe * 4));
6013         I915_WRITE(aud_cntrl_st2, tmp);
6014         tmp = I915_READ(aud_cntrl_st2);
6015         DRM_DEBUG_DRIVER("HDMI audio: eld vld status=0x%8x\n", tmp);
6016
6017         /* Enable HDMI mode */
6018         tmp = I915_READ(aud_config);
6019         DRM_DEBUG_DRIVER("HDMI audio: audio conf: 0x%8x\n", tmp);
6020         /* clear N_programing_enable and N_value_index */
6021         tmp &= ~(AUD_CONFIG_N_VALUE_INDEX | AUD_CONFIG_N_PROG_ENABLE);
6022         I915_WRITE(aud_config, tmp);
6023
6024         DRM_DEBUG_DRIVER("ELD on pipe %c\n", pipe_name(pipe));
6025
6026         eldv = AUDIO_ELD_VALID_A << (pipe * 4);
6027         intel_crtc->eld_vld = true;
6028
6029         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
6030                 DRM_DEBUG_DRIVER("ELD: DisplayPort detected\n");
6031                 eld[5] |= (1 << 2);     /* Conn_Type, 0x1 = DisplayPort */
6032                 I915_WRITE(aud_config, AUD_CONFIG_N_VALUE_INDEX); /* 0x1 = DP */
6033         } else
6034                 I915_WRITE(aud_config, 0);
6035
6036         if (intel_eld_uptodate(connector,
6037                                aud_cntrl_st2, eldv,
6038                                aud_cntl_st, IBX_ELD_ADDRESS,
6039                                hdmiw_hdmiedid))
6040                 return;
6041
6042         i = I915_READ(aud_cntrl_st2);
6043         i &= ~eldv;
6044         I915_WRITE(aud_cntrl_st2, i);
6045
6046         if (!eld[0])
6047                 return;
6048
6049         i = I915_READ(aud_cntl_st);
6050         i &= ~IBX_ELD_ADDRESS;
6051         I915_WRITE(aud_cntl_st, i);
6052         i = (i >> 29) & DIP_PORT_SEL_MASK;              /* DIP_Port_Select, 0x1 = PortB */
6053         DRM_DEBUG_DRIVER("port num:%d\n", i);
6054
6055         len = min_t(uint8_t, eld[2], 21);       /* 84 bytes of hw ELD buffer */
6056         DRM_DEBUG_DRIVER("ELD size %d\n", len);
6057         for (i = 0; i < len; i++)
6058                 I915_WRITE(hdmiw_hdmiedid, *((uint32_t *)eld + i));
6059
6060         i = I915_READ(aud_cntrl_st2);
6061         i |= eldv;
6062         I915_WRITE(aud_cntrl_st2, i);
6063
6064 }
6065
6066 static void ironlake_write_eld(struct drm_connector *connector,
6067                                      struct drm_crtc *crtc)
6068 {
6069         struct drm_i915_private *dev_priv = connector->dev->dev_private;
6070         uint8_t *eld = connector->eld;
6071         uint32_t eldv;
6072         uint32_t i;
6073         int len;
6074         int hdmiw_hdmiedid;
6075         int aud_config;
6076         int aud_cntl_st;
6077         int aud_cntrl_st2;
6078         int pipe = to_intel_crtc(crtc)->pipe;
6079
6080         if (HAS_PCH_IBX(connector->dev)) {
6081                 hdmiw_hdmiedid = IBX_HDMIW_HDMIEDID(pipe);
6082                 aud_config = IBX_AUD_CFG(pipe);
6083                 aud_cntl_st = IBX_AUD_CNTL_ST(pipe);
6084                 aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
6085         } else {
6086                 hdmiw_hdmiedid = CPT_HDMIW_HDMIEDID(pipe);
6087                 aud_config = CPT_AUD_CFG(pipe);
6088                 aud_cntl_st = CPT_AUD_CNTL_ST(pipe);
6089                 aud_cntrl_st2 = CPT_AUD_CNTRL_ST2;
6090         }
6091
6092         DRM_DEBUG_DRIVER("ELD on pipe %c\n", pipe_name(pipe));
6093
6094         i = I915_READ(aud_cntl_st);
6095         i = (i >> 29) & DIP_PORT_SEL_MASK;              /* DIP_Port_Select, 0x1 = PortB */
6096         if (!i) {
6097                 DRM_DEBUG_DRIVER("Audio directed to unknown port\n");
6098                 /* operate blindly on all ports */
6099                 eldv = IBX_ELD_VALIDB;
6100                 eldv |= IBX_ELD_VALIDB << 4;
6101                 eldv |= IBX_ELD_VALIDB << 8;
6102         } else {
6103                 DRM_DEBUG_DRIVER("ELD on port %c\n", 'A' + i);
6104                 eldv = IBX_ELD_VALIDB << ((i - 1) * 4);
6105         }
6106
6107         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
6108                 DRM_DEBUG_DRIVER("ELD: DisplayPort detected\n");
6109                 eld[5] |= (1 << 2);     /* Conn_Type, 0x1 = DisplayPort */
6110                 I915_WRITE(aud_config, AUD_CONFIG_N_VALUE_INDEX); /* 0x1 = DP */
6111         } else
6112                 I915_WRITE(aud_config, 0);
6113
6114         if (intel_eld_uptodate(connector,
6115                                aud_cntrl_st2, eldv,
6116                                aud_cntl_st, IBX_ELD_ADDRESS,
6117                                hdmiw_hdmiedid))
6118                 return;
6119
6120         i = I915_READ(aud_cntrl_st2);
6121         i &= ~eldv;
6122         I915_WRITE(aud_cntrl_st2, i);
6123
6124         if (!eld[0])
6125                 return;
6126
6127         i = I915_READ(aud_cntl_st);
6128         i &= ~IBX_ELD_ADDRESS;
6129         I915_WRITE(aud_cntl_st, i);
6130
6131         len = min_t(uint8_t, eld[2], 21);       /* 84 bytes of hw ELD buffer */
6132         DRM_DEBUG_DRIVER("ELD size %d\n", len);
6133         for (i = 0; i < len; i++)
6134                 I915_WRITE(hdmiw_hdmiedid, *((uint32_t *)eld + i));
6135
6136         i = I915_READ(aud_cntrl_st2);
6137         i |= eldv;
6138         I915_WRITE(aud_cntrl_st2, i);
6139 }
6140
6141 void intel_write_eld(struct drm_encoder *encoder,
6142                      struct drm_display_mode *mode)
6143 {
6144         struct drm_crtc *crtc = encoder->crtc;
6145         struct drm_connector *connector;
6146         struct drm_device *dev = encoder->dev;
6147         struct drm_i915_private *dev_priv = dev->dev_private;
6148
6149         connector = drm_select_eld(encoder, mode);
6150         if (!connector)
6151                 return;
6152
6153         DRM_DEBUG_DRIVER("ELD on [CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
6154                          connector->base.id,
6155                          drm_get_connector_name(connector),
6156                          connector->encoder->base.id,
6157                          drm_get_encoder_name(connector->encoder));
6158
6159         connector->eld[6] = drm_av_sync_delay(connector, mode) / 2;
6160
6161         if (dev_priv->display.write_eld)
6162                 dev_priv->display.write_eld(connector, crtc);
6163 }
6164
6165 /** Loads the palette/gamma unit for the CRTC with the prepared values */
6166 void intel_crtc_load_lut(struct drm_crtc *crtc)
6167 {
6168         struct drm_device *dev = crtc->dev;
6169         struct drm_i915_private *dev_priv = dev->dev_private;
6170         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6171         int palreg = PALETTE(intel_crtc->pipe);
6172         int i;
6173
6174         /* The clocks have to be on to load the palette. */
6175         if (!crtc->enabled || !intel_crtc->active)
6176                 return;
6177
6178         /* use legacy palette for Ironlake */
6179         if (HAS_PCH_SPLIT(dev))
6180                 palreg = LGC_PALETTE(intel_crtc->pipe);
6181
6182         for (i = 0; i < 256; i++) {
6183                 I915_WRITE(palreg + 4 * i,
6184                            (intel_crtc->lut_r[i] << 16) |
6185                            (intel_crtc->lut_g[i] << 8) |
6186                            intel_crtc->lut_b[i]);
6187         }
6188 }
6189
6190 static void i845_update_cursor(struct drm_crtc *crtc, u32 base)
6191 {
6192         struct drm_device *dev = crtc->dev;
6193         struct drm_i915_private *dev_priv = dev->dev_private;
6194         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6195         bool visible = base != 0;
6196         u32 cntl;
6197
6198         if (intel_crtc->cursor_visible == visible)
6199                 return;
6200
6201         cntl = I915_READ(_CURACNTR);
6202         if (visible) {
6203                 /* On these chipsets we can only modify the base whilst
6204                  * the cursor is disabled.
6205                  */
6206                 I915_WRITE(_CURABASE, base);
6207
6208                 cntl &= ~(CURSOR_FORMAT_MASK);
6209                 /* XXX width must be 64, stride 256 => 0x00 << 28 */
6210                 cntl |= CURSOR_ENABLE |
6211                         CURSOR_GAMMA_ENABLE |
6212                         CURSOR_FORMAT_ARGB;
6213         } else
6214                 cntl &= ~(CURSOR_ENABLE | CURSOR_GAMMA_ENABLE);
6215         I915_WRITE(_CURACNTR, cntl);
6216
6217         intel_crtc->cursor_visible = visible;
6218 }
6219
6220 static void i9xx_update_cursor(struct drm_crtc *crtc, u32 base)
6221 {
6222         struct drm_device *dev = crtc->dev;
6223         struct drm_i915_private *dev_priv = dev->dev_private;
6224         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6225         int pipe = intel_crtc->pipe;
6226         bool visible = base != 0;
6227
6228         if (intel_crtc->cursor_visible != visible) {
6229                 uint32_t cntl = I915_READ(CURCNTR(pipe));
6230                 if (base) {
6231                         cntl &= ~(CURSOR_MODE | MCURSOR_PIPE_SELECT);
6232                         cntl |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
6233                         cntl |= pipe << 28; /* Connect to correct pipe */
6234                 } else {
6235                         cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
6236                         cntl |= CURSOR_MODE_DISABLE;
6237                 }
6238                 I915_WRITE(CURCNTR(pipe), cntl);
6239
6240                 intel_crtc->cursor_visible = visible;
6241         }
6242         /* and commit changes on next vblank */
6243         I915_WRITE(CURBASE(pipe), base);
6244 }
6245
6246 static void ivb_update_cursor(struct drm_crtc *crtc, u32 base)
6247 {
6248         struct drm_device *dev = crtc->dev;
6249         struct drm_i915_private *dev_priv = dev->dev_private;
6250         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6251         int pipe = intel_crtc->pipe;
6252         bool visible = base != 0;
6253
6254         if (intel_crtc->cursor_visible != visible) {
6255                 uint32_t cntl = I915_READ(CURCNTR_IVB(pipe));
6256                 if (base) {
6257                         cntl &= ~CURSOR_MODE;
6258                         cntl |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
6259                 } else {
6260                         cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
6261                         cntl |= CURSOR_MODE_DISABLE;
6262                 }
6263                 if (IS_HASWELL(dev))
6264                         cntl |= CURSOR_PIPE_CSC_ENABLE;
6265                 I915_WRITE(CURCNTR_IVB(pipe), cntl);
6266
6267                 intel_crtc->cursor_visible = visible;
6268         }
6269         /* and commit changes on next vblank */
6270         I915_WRITE(CURBASE_IVB(pipe), base);
6271 }
6272
6273 /* If no-part of the cursor is visible on the framebuffer, then the GPU may hang... */
6274 static void intel_crtc_update_cursor(struct drm_crtc *crtc,
6275                                      bool on)
6276 {
6277         struct drm_device *dev = crtc->dev;
6278         struct drm_i915_private *dev_priv = dev->dev_private;
6279         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6280         int pipe = intel_crtc->pipe;
6281         int x = intel_crtc->cursor_x;
6282         int y = intel_crtc->cursor_y;
6283         u32 base, pos;
6284         bool visible;
6285
6286         pos = 0;
6287
6288         if (on && crtc->enabled && crtc->fb) {
6289                 base = intel_crtc->cursor_addr;
6290                 if (x > (int) crtc->fb->width)
6291                         base = 0;
6292
6293                 if (y > (int) crtc->fb->height)
6294                         base = 0;
6295         } else
6296                 base = 0;
6297
6298         if (x < 0) {
6299                 if (x + intel_crtc->cursor_width < 0)
6300                         base = 0;
6301
6302                 pos |= CURSOR_POS_SIGN << CURSOR_X_SHIFT;
6303                 x = -x;
6304         }
6305         pos |= x << CURSOR_X_SHIFT;
6306
6307         if (y < 0) {
6308                 if (y + intel_crtc->cursor_height < 0)
6309                         base = 0;
6310
6311                 pos |= CURSOR_POS_SIGN << CURSOR_Y_SHIFT;
6312                 y = -y;
6313         }
6314         pos |= y << CURSOR_Y_SHIFT;
6315
6316         visible = base != 0;
6317         if (!visible && !intel_crtc->cursor_visible)
6318                 return;
6319
6320         if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
6321                 I915_WRITE(CURPOS_IVB(pipe), pos);
6322                 ivb_update_cursor(crtc, base);
6323         } else {
6324                 I915_WRITE(CURPOS(pipe), pos);
6325                 if (IS_845G(dev) || IS_I865G(dev))
6326                         i845_update_cursor(crtc, base);
6327                 else
6328                         i9xx_update_cursor(crtc, base);
6329         }
6330 }
6331
6332 static int intel_crtc_cursor_set(struct drm_crtc *crtc,
6333                                  struct drm_file *file,
6334                                  uint32_t handle,
6335                                  uint32_t width, uint32_t height)
6336 {
6337         struct drm_device *dev = crtc->dev;
6338         struct drm_i915_private *dev_priv = dev->dev_private;
6339         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6340         struct drm_i915_gem_object *obj;
6341         uint32_t addr;
6342         int ret;
6343
6344         /* if we want to turn off the cursor ignore width and height */
6345         if (!handle) {
6346                 DRM_DEBUG_KMS("cursor off\n");
6347                 addr = 0;
6348                 obj = NULL;
6349                 mutex_lock(&dev->struct_mutex);
6350                 goto finish;
6351         }
6352
6353         /* Currently we only support 64x64 cursors */
6354         if (width != 64 || height != 64) {
6355                 DRM_ERROR("we currently only support 64x64 cursors\n");
6356                 return -EINVAL;
6357         }
6358
6359         obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle));
6360         if (&obj->base == NULL)
6361                 return -ENOENT;
6362
6363         if (obj->base.size < width * height * 4) {
6364                 DRM_ERROR("buffer is to small\n");
6365                 ret = -ENOMEM;
6366                 goto fail;
6367         }
6368
6369         /* we only need to pin inside GTT if cursor is non-phy */
6370         mutex_lock(&dev->struct_mutex);
6371         if (!dev_priv->info->cursor_needs_physical) {
6372                 if (obj->tiling_mode) {
6373                         DRM_ERROR("cursor cannot be tiled\n");
6374                         ret = -EINVAL;
6375                         goto fail_locked;
6376                 }
6377
6378                 ret = i915_gem_object_pin_to_display_plane(obj, 0, NULL);
6379                 if (ret) {
6380                         DRM_ERROR("failed to move cursor bo into the GTT\n");
6381                         goto fail_locked;
6382                 }
6383
6384                 ret = i915_gem_object_put_fence(obj);
6385                 if (ret) {
6386                         DRM_ERROR("failed to release fence for cursor");
6387                         goto fail_unpin;
6388                 }
6389
6390                 addr = obj->gtt_offset;
6391         } else {
6392                 int align = IS_I830(dev) ? 16 * 1024 : 256;
6393                 ret = i915_gem_attach_phys_object(dev, obj,
6394                                                   (intel_crtc->pipe == 0) ? I915_GEM_PHYS_CURSOR_0 : I915_GEM_PHYS_CURSOR_1,
6395                                                   align);
6396                 if (ret) {
6397                         DRM_ERROR("failed to attach phys object\n");
6398                         goto fail_locked;
6399                 }
6400                 addr = obj->phys_obj->handle->busaddr;
6401         }
6402
6403         if (IS_GEN2(dev))
6404                 I915_WRITE(CURSIZE, (height << 12) | width);
6405
6406  finish:
6407         if (intel_crtc->cursor_bo) {
6408                 if (dev_priv->info->cursor_needs_physical) {
6409                         if (intel_crtc->cursor_bo != obj)
6410                                 i915_gem_detach_phys_object(dev, intel_crtc->cursor_bo);
6411                 } else
6412                         i915_gem_object_unpin(intel_crtc->cursor_bo);
6413                 drm_gem_object_unreference(&intel_crtc->cursor_bo->base);
6414         }
6415
6416         mutex_unlock(&dev->struct_mutex);
6417
6418         intel_crtc->cursor_addr = addr;
6419         intel_crtc->cursor_bo = obj;
6420         intel_crtc->cursor_width = width;
6421         intel_crtc->cursor_height = height;
6422
6423         intel_crtc_update_cursor(crtc, true);
6424
6425         return 0;
6426 fail_unpin:
6427         i915_gem_object_unpin(obj);
6428 fail_locked:
6429         mutex_unlock(&dev->struct_mutex);
6430 fail:
6431         drm_gem_object_unreference_unlocked(&obj->base);
6432         return ret;
6433 }
6434
6435 static int intel_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
6436 {
6437         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6438
6439         intel_crtc->cursor_x = x;
6440         intel_crtc->cursor_y = y;
6441
6442         intel_crtc_update_cursor(crtc, true);
6443
6444         return 0;
6445 }
6446
6447 /** Sets the color ramps on behalf of RandR */
6448 void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
6449                                  u16 blue, int regno)
6450 {
6451         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6452
6453         intel_crtc->lut_r[regno] = red >> 8;
6454         intel_crtc->lut_g[regno] = green >> 8;
6455         intel_crtc->lut_b[regno] = blue >> 8;
6456 }
6457
6458 void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
6459                              u16 *blue, int regno)
6460 {
6461         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6462
6463         *red = intel_crtc->lut_r[regno] << 8;
6464         *green = intel_crtc->lut_g[regno] << 8;
6465         *blue = intel_crtc->lut_b[regno] << 8;
6466 }
6467
6468 static void intel_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
6469                                  u16 *blue, uint32_t start, uint32_t size)
6470 {
6471         int end = (start + size > 256) ? 256 : start + size, i;
6472         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6473
6474         for (i = start; i < end; i++) {
6475                 intel_crtc->lut_r[i] = red[i] >> 8;
6476                 intel_crtc->lut_g[i] = green[i] >> 8;
6477                 intel_crtc->lut_b[i] = blue[i] >> 8;
6478         }
6479
6480         intel_crtc_load_lut(crtc);
6481 }
6482
6483 /* VESA 640x480x72Hz mode to set on the pipe */
6484 static struct drm_display_mode load_detect_mode = {
6485         DRM_MODE("640x480", DRM_MODE_TYPE_DEFAULT, 31500, 640, 664,
6486                  704, 832, 0, 480, 489, 491, 520, 0, DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC),
6487 };
6488
6489 static struct drm_framebuffer *
6490 intel_framebuffer_create(struct drm_device *dev,
6491                          struct drm_mode_fb_cmd2 *mode_cmd,
6492                          struct drm_i915_gem_object *obj)
6493 {
6494         struct intel_framebuffer *intel_fb;
6495         int ret;
6496
6497         intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
6498         if (!intel_fb) {
6499                 drm_gem_object_unreference_unlocked(&obj->base);
6500                 return ERR_PTR(-ENOMEM);
6501         }
6502
6503         ret = intel_framebuffer_init(dev, intel_fb, mode_cmd, obj);
6504         if (ret) {
6505                 drm_gem_object_unreference_unlocked(&obj->base);
6506                 kfree(intel_fb);
6507                 return ERR_PTR(ret);
6508         }
6509
6510         return &intel_fb->base;
6511 }
6512
6513 static u32
6514 intel_framebuffer_pitch_for_width(int width, int bpp)
6515 {
6516         u32 pitch = DIV_ROUND_UP(width * bpp, 8);
6517         return ALIGN(pitch, 64);
6518 }
6519
6520 static u32
6521 intel_framebuffer_size_for_mode(struct drm_display_mode *mode, int bpp)
6522 {
6523         u32 pitch = intel_framebuffer_pitch_for_width(mode->hdisplay, bpp);
6524         return ALIGN(pitch * mode->vdisplay, PAGE_SIZE);
6525 }
6526
6527 static struct drm_framebuffer *
6528 intel_framebuffer_create_for_mode(struct drm_device *dev,
6529                                   struct drm_display_mode *mode,
6530                                   int depth, int bpp)
6531 {
6532         struct drm_i915_gem_object *obj;
6533         struct drm_mode_fb_cmd2 mode_cmd = { 0 };
6534
6535         obj = i915_gem_alloc_object(dev,
6536                                     intel_framebuffer_size_for_mode(mode, bpp));
6537         if (obj == NULL)
6538                 return ERR_PTR(-ENOMEM);
6539
6540         mode_cmd.width = mode->hdisplay;
6541         mode_cmd.height = mode->vdisplay;
6542         mode_cmd.pitches[0] = intel_framebuffer_pitch_for_width(mode_cmd.width,
6543                                                                 bpp);
6544         mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
6545
6546         return intel_framebuffer_create(dev, &mode_cmd, obj);
6547 }
6548
6549 static struct drm_framebuffer *
6550 mode_fits_in_fbdev(struct drm_device *dev,
6551                    struct drm_display_mode *mode)
6552 {
6553         struct drm_i915_private *dev_priv = dev->dev_private;
6554         struct drm_i915_gem_object *obj;
6555         struct drm_framebuffer *fb;
6556
6557         if (dev_priv->fbdev == NULL)
6558                 return NULL;
6559
6560         obj = dev_priv->fbdev->ifb.obj;
6561         if (obj == NULL)
6562                 return NULL;
6563
6564         fb = &dev_priv->fbdev->ifb.base;
6565         if (fb->pitches[0] < intel_framebuffer_pitch_for_width(mode->hdisplay,
6566                                                                fb->bits_per_pixel))
6567                 return NULL;
6568
6569         if (obj->base.size < mode->vdisplay * fb->pitches[0])
6570                 return NULL;
6571
6572         return fb;
6573 }
6574
6575 bool intel_get_load_detect_pipe(struct drm_connector *connector,
6576                                 struct drm_display_mode *mode,
6577                                 struct intel_load_detect_pipe *old)
6578 {
6579         struct intel_crtc *intel_crtc;
6580         struct intel_encoder *intel_encoder =
6581                 intel_attached_encoder(connector);
6582         struct drm_crtc *possible_crtc;
6583         struct drm_encoder *encoder = &intel_encoder->base;
6584         struct drm_crtc *crtc = NULL;
6585         struct drm_device *dev = encoder->dev;
6586         struct drm_framebuffer *fb;
6587         int i = -1;
6588
6589         DRM_DEBUG_KMS("[CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
6590                       connector->base.id, drm_get_connector_name(connector),
6591                       encoder->base.id, drm_get_encoder_name(encoder));
6592
6593         /*
6594          * Algorithm gets a little messy:
6595          *
6596          *   - if the connector already has an assigned crtc, use it (but make
6597          *     sure it's on first)
6598          *
6599          *   - try to find the first unused crtc that can drive this connector,
6600          *     and use that if we find one
6601          */
6602
6603         /* See if we already have a CRTC for this connector */
6604         if (encoder->crtc) {
6605                 crtc = encoder->crtc;
6606
6607                 mutex_lock(&crtc->mutex);
6608
6609                 old->dpms_mode = connector->dpms;
6610                 old->load_detect_temp = false;
6611
6612                 /* Make sure the crtc and connector are running */
6613                 if (connector->dpms != DRM_MODE_DPMS_ON)
6614                         connector->funcs->dpms(connector, DRM_MODE_DPMS_ON);
6615
6616                 return true;
6617         }
6618
6619         /* Find an unused one (if possible) */
6620         list_for_each_entry(possible_crtc, &dev->mode_config.crtc_list, head) {
6621                 i++;
6622                 if (!(encoder->possible_crtcs & (1 << i)))
6623                         continue;
6624                 if (!possible_crtc->enabled) {
6625                         crtc = possible_crtc;
6626                         break;
6627                 }
6628         }
6629
6630         /*
6631          * If we didn't find an unused CRTC, don't use any.
6632          */
6633         if (!crtc) {
6634                 DRM_DEBUG_KMS("no pipe available for load-detect\n");
6635                 return false;
6636         }
6637
6638         mutex_lock(&crtc->mutex);
6639         intel_encoder->new_crtc = to_intel_crtc(crtc);
6640         to_intel_connector(connector)->new_encoder = intel_encoder;
6641
6642         intel_crtc = to_intel_crtc(crtc);
6643         old->dpms_mode = connector->dpms;
6644         old->load_detect_temp = true;
6645         old->release_fb = NULL;
6646
6647         if (!mode)
6648                 mode = &load_detect_mode;
6649
6650         /* We need a framebuffer large enough to accommodate all accesses
6651          * that the plane may generate whilst we perform load detection.
6652          * We can not rely on the fbcon either being present (we get called
6653          * during its initialisation to detect all boot displays, or it may
6654          * not even exist) or that it is large enough to satisfy the
6655          * requested mode.
6656          */
6657         fb = mode_fits_in_fbdev(dev, mode);
6658         if (fb == NULL) {
6659                 DRM_DEBUG_KMS("creating tmp fb for load-detection\n");
6660                 fb = intel_framebuffer_create_for_mode(dev, mode, 24, 32);
6661                 old->release_fb = fb;
6662         } else
6663                 DRM_DEBUG_KMS("reusing fbdev for load-detection framebuffer\n");
6664         if (IS_ERR(fb)) {
6665                 DRM_DEBUG_KMS("failed to allocate framebuffer for load-detection\n");
6666                 mutex_unlock(&crtc->mutex);
6667                 return false;
6668         }
6669
6670         if (intel_set_mode(crtc, mode, 0, 0, fb)) {
6671                 DRM_DEBUG_KMS("failed to set mode on load-detect pipe\n");
6672                 if (old->release_fb)
6673                         old->release_fb->funcs->destroy(old->release_fb);
6674                 mutex_unlock(&crtc->mutex);
6675                 return false;
6676         }
6677
6678         /* let the connector get through one full cycle before testing */
6679         intel_wait_for_vblank(dev, intel_crtc->pipe);
6680         return true;
6681 }
6682
6683 void intel_release_load_detect_pipe(struct drm_connector *connector,
6684                                     struct intel_load_detect_pipe *old)
6685 {
6686         struct intel_encoder *intel_encoder =
6687                 intel_attached_encoder(connector);
6688         struct drm_encoder *encoder = &intel_encoder->base;
6689         struct drm_crtc *crtc = encoder->crtc;
6690
6691         DRM_DEBUG_KMS("[CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
6692                       connector->base.id, drm_get_connector_name(connector),
6693                       encoder->base.id, drm_get_encoder_name(encoder));
6694
6695         if (old->load_detect_temp) {
6696                 to_intel_connector(connector)->new_encoder = NULL;
6697                 intel_encoder->new_crtc = NULL;
6698                 intel_set_mode(crtc, NULL, 0, 0, NULL);
6699
6700                 if (old->release_fb) {
6701                         drm_framebuffer_unregister_private(old->release_fb);
6702                         drm_framebuffer_unreference(old->release_fb);
6703                 }
6704
6705                 mutex_unlock(&crtc->mutex);
6706                 return;
6707         }
6708
6709         /* Switch crtc and encoder back off if necessary */
6710         if (old->dpms_mode != DRM_MODE_DPMS_ON)
6711                 connector->funcs->dpms(connector, old->dpms_mode);
6712
6713         mutex_unlock(&crtc->mutex);
6714 }
6715
6716 /* Returns the clock of the currently programmed mode of the given pipe. */
6717 static int intel_crtc_clock_get(struct drm_device *dev, struct drm_crtc *crtc)
6718 {
6719         struct drm_i915_private *dev_priv = dev->dev_private;
6720         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6721         int pipe = intel_crtc->pipe;
6722         u32 dpll = I915_READ(DPLL(pipe));
6723         u32 fp;
6724         intel_clock_t clock;
6725
6726         if ((dpll & DISPLAY_RATE_SELECT_FPA1) == 0)
6727                 fp = I915_READ(FP0(pipe));
6728         else
6729                 fp = I915_READ(FP1(pipe));
6730
6731         clock.m1 = (fp & FP_M1_DIV_MASK) >> FP_M1_DIV_SHIFT;
6732         if (IS_PINEVIEW(dev)) {
6733                 clock.n = ffs((fp & FP_N_PINEVIEW_DIV_MASK) >> FP_N_DIV_SHIFT) - 1;
6734                 clock.m2 = (fp & FP_M2_PINEVIEW_DIV_MASK) >> FP_M2_DIV_SHIFT;
6735         } else {
6736                 clock.n = (fp & FP_N_DIV_MASK) >> FP_N_DIV_SHIFT;
6737                 clock.m2 = (fp & FP_M2_DIV_MASK) >> FP_M2_DIV_SHIFT;
6738         }
6739
6740         if (!IS_GEN2(dev)) {
6741                 if (IS_PINEVIEW(dev))
6742                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_PINEVIEW) >>
6743                                 DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW);
6744                 else
6745                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK) >>
6746                                DPLL_FPA01_P1_POST_DIV_SHIFT);
6747
6748                 switch (dpll & DPLL_MODE_MASK) {
6749                 case DPLLB_MODE_DAC_SERIAL:
6750                         clock.p2 = dpll & DPLL_DAC_SERIAL_P2_CLOCK_DIV_5 ?
6751                                 5 : 10;
6752                         break;
6753                 case DPLLB_MODE_LVDS:
6754                         clock.p2 = dpll & DPLLB_LVDS_P2_CLOCK_DIV_7 ?
6755                                 7 : 14;
6756                         break;
6757                 default:
6758                         DRM_DEBUG_KMS("Unknown DPLL mode %08x in programmed "
6759                                   "mode\n", (int)(dpll & DPLL_MODE_MASK));
6760                         return 0;
6761                 }
6762
6763                 /* XXX: Handle the 100Mhz refclk */
6764                 intel_clock(dev, 96000, &clock);
6765         } else {
6766                 bool is_lvds = (pipe == 1) && (I915_READ(LVDS) & LVDS_PORT_EN);
6767
6768                 if (is_lvds) {
6769                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830_LVDS) >>
6770                                        DPLL_FPA01_P1_POST_DIV_SHIFT);
6771                         clock.p2 = 14;
6772
6773                         if ((dpll & PLL_REF_INPUT_MASK) ==
6774                             PLLB_REF_INPUT_SPREADSPECTRUMIN) {
6775                                 /* XXX: might not be 66MHz */
6776                                 intel_clock(dev, 66000, &clock);
6777                         } else
6778                                 intel_clock(dev, 48000, &clock);
6779                 } else {
6780                         if (dpll & PLL_P1_DIVIDE_BY_TWO)
6781                                 clock.p1 = 2;
6782                         else {
6783                                 clock.p1 = ((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830) >>
6784                                             DPLL_FPA01_P1_POST_DIV_SHIFT) + 2;
6785                         }
6786                         if (dpll & PLL_P2_DIVIDE_BY_4)
6787                                 clock.p2 = 4;
6788                         else
6789                                 clock.p2 = 2;
6790
6791                         intel_clock(dev, 48000, &clock);
6792                 }
6793         }
6794
6795         /* XXX: It would be nice to validate the clocks, but we can't reuse
6796          * i830PllIsValid() because it relies on the xf86_config connector
6797          * configuration being accurate, which it isn't necessarily.
6798          */
6799
6800         return clock.dot;
6801 }
6802
6803 /** Returns the currently programmed mode of the given pipe. */
6804 struct drm_display_mode *intel_crtc_mode_get(struct drm_device *dev,
6805                                              struct drm_crtc *crtc)
6806 {
6807         struct drm_i915_private *dev_priv = dev->dev_private;
6808         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6809         enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder;
6810         struct drm_display_mode *mode;
6811         int htot = I915_READ(HTOTAL(cpu_transcoder));
6812         int hsync = I915_READ(HSYNC(cpu_transcoder));
6813         int vtot = I915_READ(VTOTAL(cpu_transcoder));
6814         int vsync = I915_READ(VSYNC(cpu_transcoder));
6815
6816         mode = kzalloc(sizeof(*mode), GFP_KERNEL);
6817         if (!mode)
6818                 return NULL;
6819
6820         mode->clock = intel_crtc_clock_get(dev, crtc);
6821         mode->hdisplay = (htot & 0xffff) + 1;
6822         mode->htotal = ((htot & 0xffff0000) >> 16) + 1;
6823         mode->hsync_start = (hsync & 0xffff) + 1;
6824         mode->hsync_end = ((hsync & 0xffff0000) >> 16) + 1;
6825         mode->vdisplay = (vtot & 0xffff) + 1;
6826         mode->vtotal = ((vtot & 0xffff0000) >> 16) + 1;
6827         mode->vsync_start = (vsync & 0xffff) + 1;
6828         mode->vsync_end = ((vsync & 0xffff0000) >> 16) + 1;
6829
6830         drm_mode_set_name(mode);
6831
6832         return mode;
6833 }
6834
6835 static void intel_increase_pllclock(struct drm_crtc *crtc)
6836 {
6837         struct drm_device *dev = crtc->dev;
6838         drm_i915_private_t *dev_priv = dev->dev_private;
6839         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6840         int pipe = intel_crtc->pipe;
6841         int dpll_reg = DPLL(pipe);
6842         int dpll;
6843
6844         if (HAS_PCH_SPLIT(dev))
6845                 return;
6846
6847         if (!dev_priv->lvds_downclock_avail)
6848                 return;
6849
6850         dpll = I915_READ(dpll_reg);
6851         if (!HAS_PIPE_CXSR(dev) && (dpll & DISPLAY_RATE_SELECT_FPA1)) {
6852                 DRM_DEBUG_DRIVER("upclocking LVDS\n");
6853
6854                 assert_panel_unlocked(dev_priv, pipe);
6855
6856                 dpll &= ~DISPLAY_RATE_SELECT_FPA1;
6857                 I915_WRITE(dpll_reg, dpll);
6858                 intel_wait_for_vblank(dev, pipe);
6859
6860                 dpll = I915_READ(dpll_reg);
6861                 if (dpll & DISPLAY_RATE_SELECT_FPA1)
6862                         DRM_DEBUG_DRIVER("failed to upclock LVDS!\n");
6863         }
6864 }
6865
6866 static void intel_decrease_pllclock(struct drm_crtc *crtc)
6867 {
6868         struct drm_device *dev = crtc->dev;
6869         drm_i915_private_t *dev_priv = dev->dev_private;
6870         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6871
6872         if (HAS_PCH_SPLIT(dev))
6873                 return;
6874
6875         if (!dev_priv->lvds_downclock_avail)
6876                 return;
6877
6878         /*
6879          * Since this is called by a timer, we should never get here in
6880          * the manual case.
6881          */
6882         if (!HAS_PIPE_CXSR(dev) && intel_crtc->lowfreq_avail) {
6883                 int pipe = intel_crtc->pipe;
6884                 int dpll_reg = DPLL(pipe);
6885                 int dpll;
6886
6887                 DRM_DEBUG_DRIVER("downclocking LVDS\n");
6888
6889                 assert_panel_unlocked(dev_priv, pipe);
6890
6891                 dpll = I915_READ(dpll_reg);
6892                 dpll |= DISPLAY_RATE_SELECT_FPA1;
6893                 I915_WRITE(dpll_reg, dpll);
6894                 intel_wait_for_vblank(dev, pipe);
6895                 dpll = I915_READ(dpll_reg);
6896                 if (!(dpll & DISPLAY_RATE_SELECT_FPA1))
6897                         DRM_DEBUG_DRIVER("failed to downclock LVDS!\n");
6898         }
6899
6900 }
6901
6902 void intel_mark_busy(struct drm_device *dev)
6903 {
6904         i915_update_gfx_val(dev->dev_private);
6905 }
6906
6907 void intel_mark_idle(struct drm_device *dev)
6908 {
6909         struct drm_crtc *crtc;
6910
6911         if (!i915_powersave)
6912                 return;
6913
6914         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
6915                 if (!crtc->fb)
6916                         continue;
6917
6918                 intel_decrease_pllclock(crtc);
6919         }
6920 }
6921
6922 void intel_mark_fb_busy(struct drm_i915_gem_object *obj)
6923 {
6924         struct drm_device *dev = obj->base.dev;
6925         struct drm_crtc *crtc;
6926
6927         if (!i915_powersave)
6928                 return;
6929
6930         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
6931                 if (!crtc->fb)
6932                         continue;
6933
6934                 if (to_intel_framebuffer(crtc->fb)->obj == obj)
6935                         intel_increase_pllclock(crtc);
6936         }
6937 }
6938
6939 static void intel_crtc_destroy(struct drm_crtc *crtc)
6940 {
6941         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6942         struct drm_device *dev = crtc->dev;
6943         struct intel_unpin_work *work;
6944         unsigned long flags;
6945
6946         spin_lock_irqsave(&dev->event_lock, flags);
6947         work = intel_crtc->unpin_work;
6948         intel_crtc->unpin_work = NULL;
6949         spin_unlock_irqrestore(&dev->event_lock, flags);
6950
6951         if (work) {
6952                 cancel_work_sync(&work->work);
6953                 kfree(work);
6954         }
6955
6956         drm_crtc_cleanup(crtc);
6957
6958         kfree(intel_crtc);
6959 }
6960
6961 static void intel_unpin_work_fn(struct work_struct *__work)
6962 {
6963         struct intel_unpin_work *work =
6964                 container_of(__work, struct intel_unpin_work, work);
6965         struct drm_device *dev = work->crtc->dev;
6966
6967         mutex_lock(&dev->struct_mutex);
6968         intel_unpin_fb_obj(work->old_fb_obj);
6969         drm_gem_object_unreference(&work->pending_flip_obj->base);
6970         drm_gem_object_unreference(&work->old_fb_obj->base);
6971
6972         intel_update_fbc(dev);
6973         mutex_unlock(&dev->struct_mutex);
6974
6975         BUG_ON(atomic_read(&to_intel_crtc(work->crtc)->unpin_work_count) == 0);
6976         atomic_dec(&to_intel_crtc(work->crtc)->unpin_work_count);
6977
6978         kfree(work);
6979 }
6980
6981 static void do_intel_finish_page_flip(struct drm_device *dev,
6982                                       struct drm_crtc *crtc)
6983 {
6984         drm_i915_private_t *dev_priv = dev->dev_private;
6985         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
6986         struct intel_unpin_work *work;
6987         unsigned long flags;
6988
6989         /* Ignore early vblank irqs */
6990         if (intel_crtc == NULL)
6991                 return;
6992
6993         spin_lock_irqsave(&dev->event_lock, flags);
6994         work = intel_crtc->unpin_work;
6995
6996         /* Ensure we don't miss a work->pending update ... */
6997         smp_rmb();
6998
6999         if (work == NULL || atomic_read(&work->pending) < INTEL_FLIP_COMPLETE) {
7000                 spin_unlock_irqrestore(&dev->event_lock, flags);
7001                 return;
7002         }
7003
7004         /* and that the unpin work is consistent wrt ->pending. */
7005         smp_rmb();
7006
7007         intel_crtc->unpin_work = NULL;
7008
7009         if (work->event)
7010                 drm_send_vblank_event(dev, intel_crtc->pipe, work->event);
7011
7012         drm_vblank_put(dev, intel_crtc->pipe);
7013
7014         spin_unlock_irqrestore(&dev->event_lock, flags);
7015
7016         wake_up_all(&dev_priv->pending_flip_queue);
7017
7018         queue_work(dev_priv->wq, &work->work);
7019
7020         trace_i915_flip_complete(intel_crtc->plane, work->pending_flip_obj);
7021 }
7022
7023 void intel_finish_page_flip(struct drm_device *dev, int pipe)
7024 {
7025         drm_i915_private_t *dev_priv = dev->dev_private;
7026         struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
7027
7028         do_intel_finish_page_flip(dev, crtc);
7029 }
7030
7031 void intel_finish_page_flip_plane(struct drm_device *dev, int plane)
7032 {
7033         drm_i915_private_t *dev_priv = dev->dev_private;
7034         struct drm_crtc *crtc = dev_priv->plane_to_crtc_mapping[plane];
7035
7036         do_intel_finish_page_flip(dev, crtc);
7037 }
7038
7039 void intel_prepare_page_flip(struct drm_device *dev, int plane)
7040 {
7041         drm_i915_private_t *dev_priv = dev->dev_private;
7042         struct intel_crtc *intel_crtc =
7043                 to_intel_crtc(dev_priv->plane_to_crtc_mapping[plane]);
7044         unsigned long flags;
7045
7046         /* NB: An MMIO update of the plane base pointer will also
7047          * generate a page-flip completion irq, i.e. every modeset
7048          * is also accompanied by a spurious intel_prepare_page_flip().
7049          */
7050         spin_lock_irqsave(&dev->event_lock, flags);
7051         if (intel_crtc->unpin_work)
7052                 atomic_inc_not_zero(&intel_crtc->unpin_work->pending);
7053         spin_unlock_irqrestore(&dev->event_lock, flags);
7054 }
7055
7056 inline static void intel_mark_page_flip_active(struct intel_crtc *intel_crtc)
7057 {
7058         /* Ensure that the work item is consistent when activating it ... */
7059         smp_wmb();
7060         atomic_set(&intel_crtc->unpin_work->pending, INTEL_FLIP_PENDING);
7061         /* and that it is marked active as soon as the irq could fire. */
7062         smp_wmb();
7063 }
7064
7065 static int intel_gen2_queue_flip(struct drm_device *dev,
7066                                  struct drm_crtc *crtc,
7067                                  struct drm_framebuffer *fb,
7068                                  struct drm_i915_gem_object *obj)
7069 {
7070         struct drm_i915_private *dev_priv = dev->dev_private;
7071         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7072         u32 flip_mask;
7073         struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
7074         int ret;
7075
7076         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7077         if (ret)
7078                 goto err;
7079
7080         ret = intel_ring_begin(ring, 6);
7081         if (ret)
7082                 goto err_unpin;
7083
7084         /* Can't queue multiple flips, so wait for the previous
7085          * one to finish before executing the next.
7086          */
7087         if (intel_crtc->plane)
7088                 flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
7089         else
7090                 flip_mask = MI_WAIT_FOR_PLANE_A_FLIP;
7091         intel_ring_emit(ring, MI_WAIT_FOR_EVENT | flip_mask);
7092         intel_ring_emit(ring, MI_NOOP);
7093         intel_ring_emit(ring, MI_DISPLAY_FLIP |
7094                         MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7095         intel_ring_emit(ring, fb->pitches[0]);
7096         intel_ring_emit(ring, obj->gtt_offset + intel_crtc->dspaddr_offset);
7097         intel_ring_emit(ring, 0); /* aux display base address, unused */
7098
7099         intel_mark_page_flip_active(intel_crtc);
7100         intel_ring_advance(ring);
7101         return 0;
7102
7103 err_unpin:
7104         intel_unpin_fb_obj(obj);
7105 err:
7106         return ret;
7107 }
7108
7109 static int intel_gen3_queue_flip(struct drm_device *dev,
7110                                  struct drm_crtc *crtc,
7111                                  struct drm_framebuffer *fb,
7112                                  struct drm_i915_gem_object *obj)
7113 {
7114         struct drm_i915_private *dev_priv = dev->dev_private;
7115         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7116         u32 flip_mask;
7117         struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
7118         int ret;
7119
7120         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7121         if (ret)
7122                 goto err;
7123
7124         ret = intel_ring_begin(ring, 6);
7125         if (ret)
7126                 goto err_unpin;
7127
7128         if (intel_crtc->plane)
7129                 flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
7130         else
7131                 flip_mask = MI_WAIT_FOR_PLANE_A_FLIP;
7132         intel_ring_emit(ring, MI_WAIT_FOR_EVENT | flip_mask);
7133         intel_ring_emit(ring, MI_NOOP);
7134         intel_ring_emit(ring, MI_DISPLAY_FLIP_I915 |
7135                         MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7136         intel_ring_emit(ring, fb->pitches[0]);
7137         intel_ring_emit(ring, obj->gtt_offset + intel_crtc->dspaddr_offset);
7138         intel_ring_emit(ring, MI_NOOP);
7139
7140         intel_mark_page_flip_active(intel_crtc);
7141         intel_ring_advance(ring);
7142         return 0;
7143
7144 err_unpin:
7145         intel_unpin_fb_obj(obj);
7146 err:
7147         return ret;
7148 }
7149
7150 static int intel_gen4_queue_flip(struct drm_device *dev,
7151                                  struct drm_crtc *crtc,
7152                                  struct drm_framebuffer *fb,
7153                                  struct drm_i915_gem_object *obj)
7154 {
7155         struct drm_i915_private *dev_priv = dev->dev_private;
7156         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7157         uint32_t pf, pipesrc;
7158         struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
7159         int ret;
7160
7161         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7162         if (ret)
7163                 goto err;
7164
7165         ret = intel_ring_begin(ring, 4);
7166         if (ret)
7167                 goto err_unpin;
7168
7169         /* i965+ uses the linear or tiled offsets from the
7170          * Display Registers (which do not change across a page-flip)
7171          * so we need only reprogram the base address.
7172          */
7173         intel_ring_emit(ring, MI_DISPLAY_FLIP |
7174                         MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7175         intel_ring_emit(ring, fb->pitches[0]);
7176         intel_ring_emit(ring,
7177                         (obj->gtt_offset + intel_crtc->dspaddr_offset) |
7178                         obj->tiling_mode);
7179
7180         /* XXX Enabling the panel-fitter across page-flip is so far
7181          * untested on non-native modes, so ignore it for now.
7182          * pf = I915_READ(pipe == 0 ? PFA_CTL_1 : PFB_CTL_1) & PF_ENABLE;
7183          */
7184         pf = 0;
7185         pipesrc = I915_READ(PIPESRC(intel_crtc->pipe)) & 0x0fff0fff;
7186         intel_ring_emit(ring, pf | pipesrc);
7187
7188         intel_mark_page_flip_active(intel_crtc);
7189         intel_ring_advance(ring);
7190         return 0;
7191
7192 err_unpin:
7193         intel_unpin_fb_obj(obj);
7194 err:
7195         return ret;
7196 }
7197
7198 static int intel_gen6_queue_flip(struct drm_device *dev,
7199                                  struct drm_crtc *crtc,
7200                                  struct drm_framebuffer *fb,
7201                                  struct drm_i915_gem_object *obj)
7202 {
7203         struct drm_i915_private *dev_priv = dev->dev_private;
7204         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7205         struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
7206         uint32_t pf, pipesrc;
7207         int ret;
7208
7209         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7210         if (ret)
7211                 goto err;
7212
7213         ret = intel_ring_begin(ring, 4);
7214         if (ret)
7215                 goto err_unpin;
7216
7217         intel_ring_emit(ring, MI_DISPLAY_FLIP |
7218                         MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
7219         intel_ring_emit(ring, fb->pitches[0] | obj->tiling_mode);
7220         intel_ring_emit(ring, obj->gtt_offset + intel_crtc->dspaddr_offset);
7221
7222         /* Contrary to the suggestions in the documentation,
7223          * "Enable Panel Fitter" does not seem to be required when page
7224          * flipping with a non-native mode, and worse causes a normal
7225          * modeset to fail.
7226          * pf = I915_READ(PF_CTL(intel_crtc->pipe)) & PF_ENABLE;
7227          */
7228         pf = 0;
7229         pipesrc = I915_READ(PIPESRC(intel_crtc->pipe)) & 0x0fff0fff;
7230         intel_ring_emit(ring, pf | pipesrc);
7231
7232         intel_mark_page_flip_active(intel_crtc);
7233         intel_ring_advance(ring);
7234         return 0;
7235
7236 err_unpin:
7237         intel_unpin_fb_obj(obj);
7238 err:
7239         return ret;
7240 }
7241
7242 /*
7243  * On gen7 we currently use the blit ring because (in early silicon at least)
7244  * the render ring doesn't give us interrpts for page flip completion, which
7245  * means clients will hang after the first flip is queued.  Fortunately the
7246  * blit ring generates interrupts properly, so use it instead.
7247  */
7248 static int intel_gen7_queue_flip(struct drm_device *dev,
7249                                  struct drm_crtc *crtc,
7250                                  struct drm_framebuffer *fb,
7251                                  struct drm_i915_gem_object *obj)
7252 {
7253         struct drm_i915_private *dev_priv = dev->dev_private;
7254         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7255         struct intel_ring_buffer *ring = &dev_priv->ring[BCS];
7256         uint32_t plane_bit = 0;
7257         int ret;
7258
7259         ret = intel_pin_and_fence_fb_obj(dev, obj, ring);
7260         if (ret)
7261                 goto err;
7262
7263         switch(intel_crtc->plane) {
7264         case PLANE_A:
7265                 plane_bit = MI_DISPLAY_FLIP_IVB_PLANE_A;
7266                 break;
7267         case PLANE_B:
7268                 plane_bit = MI_DISPLAY_FLIP_IVB_PLANE_B;
7269                 break;
7270         case PLANE_C:
7271                 plane_bit = MI_DISPLAY_FLIP_IVB_PLANE_C;
7272                 break;
7273         default:
7274                 WARN_ONCE(1, "unknown plane in flip command\n");
7275                 ret = -ENODEV;
7276                 goto err_unpin;
7277         }
7278
7279         ret = intel_ring_begin(ring, 4);
7280         if (ret)
7281                 goto err_unpin;
7282
7283         intel_ring_emit(ring, MI_DISPLAY_FLIP_I915 | plane_bit);
7284         intel_ring_emit(ring, (fb->pitches[0] | obj->tiling_mode));
7285         intel_ring_emit(ring, obj->gtt_offset + intel_crtc->dspaddr_offset);
7286         intel_ring_emit(ring, (MI_NOOP));
7287
7288         intel_mark_page_flip_active(intel_crtc);
7289         intel_ring_advance(ring);
7290         return 0;
7291
7292 err_unpin:
7293         intel_unpin_fb_obj(obj);
7294 err:
7295         return ret;
7296 }
7297
7298 static int intel_default_queue_flip(struct drm_device *dev,
7299                                     struct drm_crtc *crtc,
7300                                     struct drm_framebuffer *fb,
7301                                     struct drm_i915_gem_object *obj)
7302 {
7303         return -ENODEV;
7304 }
7305
7306 static int intel_crtc_page_flip(struct drm_crtc *crtc,
7307                                 struct drm_framebuffer *fb,
7308                                 struct drm_pending_vblank_event *event)
7309 {
7310         struct drm_device *dev = crtc->dev;
7311         struct drm_i915_private *dev_priv = dev->dev_private;
7312         struct drm_framebuffer *old_fb = crtc->fb;
7313         struct drm_i915_gem_object *obj = to_intel_framebuffer(fb)->obj;
7314         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
7315         struct intel_unpin_work *work;
7316         unsigned long flags;
7317         int ret;
7318
7319         /* Can't change pixel format via MI display flips. */
7320         if (fb->pixel_format != crtc->fb->pixel_format)
7321                 return -EINVAL;
7322
7323         /*
7324          * TILEOFF/LINOFF registers can't be changed via MI display flips.
7325          * Note that pitch changes could also affect these register.
7326          */
7327         if (INTEL_INFO(dev)->gen > 3 &&
7328             (fb->offsets[0] != crtc->fb->offsets[0] ||
7329              fb->pitches[0] != crtc->fb->pitches[0]))
7330                 return -EINVAL;
7331
7332         work = kzalloc(sizeof *work, GFP_KERNEL);
7333         if (work == NULL)
7334                 return -ENOMEM;
7335
7336         work->event = event;
7337         work->crtc = crtc;
7338         work->old_fb_obj = to_intel_framebuffer(old_fb)->obj;
7339         INIT_WORK(&work->work, intel_unpin_work_fn);
7340
7341         ret = drm_vblank_get(dev, intel_crtc->pipe);
7342         if (ret)
7343                 goto free_work;
7344
7345         /* We borrow the event spin lock for protecting unpin_work */
7346         spin_lock_irqsave(&dev->event_lock, flags);
7347         if (intel_crtc->unpin_work) {
7348                 spin_unlock_irqrestore(&dev->event_lock, flags);
7349                 kfree(work);
7350                 drm_vblank_put(dev, intel_crtc->pipe);
7351
7352                 DRM_DEBUG_DRIVER("flip queue: crtc already busy\n");
7353                 return -EBUSY;
7354         }
7355         intel_crtc->unpin_work = work;
7356         spin_unlock_irqrestore(&dev->event_lock, flags);
7357
7358         if (atomic_read(&intel_crtc->unpin_work_count) >= 2)
7359                 flush_workqueue(dev_priv->wq);
7360
7361         ret = i915_mutex_lock_interruptible(dev);
7362         if (ret)
7363                 goto cleanup;
7364
7365         /* Reference the objects for the scheduled work. */
7366         drm_gem_object_reference(&work->old_fb_obj->base);
7367         drm_gem_object_reference(&obj->base);
7368
7369         crtc->fb = fb;
7370
7371         work->pending_flip_obj = obj;
7372
7373         work->enable_stall_check = true;
7374
7375         atomic_inc(&intel_crtc->unpin_work_count);
7376         intel_crtc->reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
7377
7378         ret = dev_priv->display.queue_flip(dev, crtc, fb, obj);
7379         if (ret)
7380                 goto cleanup_pending;
7381
7382         intel_disable_fbc(dev);
7383         intel_mark_fb_busy(obj);
7384         mutex_unlock(&dev->struct_mutex);
7385
7386         trace_i915_flip_request(intel_crtc->plane, obj);
7387
7388         return 0;
7389
7390 cleanup_pending:
7391         atomic_dec(&intel_crtc->unpin_work_count);
7392         crtc->fb = old_fb;
7393         drm_gem_object_unreference(&work->old_fb_obj->base);
7394         drm_gem_object_unreference(&obj->base);
7395         mutex_unlock(&dev->struct_mutex);
7396
7397 cleanup:
7398         spin_lock_irqsave(&dev->event_lock, flags);
7399         intel_crtc->unpin_work = NULL;
7400         spin_unlock_irqrestore(&dev->event_lock, flags);
7401
7402         drm_vblank_put(dev, intel_crtc->pipe);
7403 free_work:
7404         kfree(work);
7405
7406         return ret;
7407 }
7408
7409 static struct drm_crtc_helper_funcs intel_helper_funcs = {
7410         .mode_set_base_atomic = intel_pipe_set_base_atomic,
7411         .load_lut = intel_crtc_load_lut,
7412 };
7413
7414 bool intel_encoder_check_is_cloned(struct intel_encoder *encoder)
7415 {
7416         struct intel_encoder *other_encoder;
7417         struct drm_crtc *crtc = &encoder->new_crtc->base;
7418
7419         if (WARN_ON(!crtc))
7420                 return false;
7421
7422         list_for_each_entry(other_encoder,
7423                             &crtc->dev->mode_config.encoder_list,
7424                             base.head) {
7425
7426                 if (&other_encoder->new_crtc->base != crtc ||
7427                     encoder == other_encoder)
7428                         continue;
7429                 else
7430                         return true;
7431         }
7432
7433         return false;
7434 }
7435
7436 static bool intel_encoder_crtc_ok(struct drm_encoder *encoder,
7437                                   struct drm_crtc *crtc)
7438 {
7439         struct drm_device *dev;
7440         struct drm_crtc *tmp;
7441         int crtc_mask = 1;
7442
7443         WARN(!crtc, "checking null crtc?\n");
7444
7445         dev = crtc->dev;
7446
7447         list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
7448                 if (tmp == crtc)
7449                         break;
7450                 crtc_mask <<= 1;
7451         }
7452
7453         if (encoder->possible_crtcs & crtc_mask)
7454                 return true;
7455         return false;
7456 }
7457
7458 /**
7459  * intel_modeset_update_staged_output_state
7460  *
7461  * Updates the staged output configuration state, e.g. after we've read out the
7462  * current hw state.
7463  */
7464 static void intel_modeset_update_staged_output_state(struct drm_device *dev)
7465 {
7466         struct intel_encoder *encoder;
7467         struct intel_connector *connector;
7468
7469         list_for_each_entry(connector, &dev->mode_config.connector_list,
7470                             base.head) {
7471                 connector->new_encoder =
7472                         to_intel_encoder(connector->base.encoder);
7473         }
7474
7475         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7476                             base.head) {
7477                 encoder->new_crtc =
7478                         to_intel_crtc(encoder->base.crtc);
7479         }
7480 }
7481
7482 /**
7483  * intel_modeset_commit_output_state
7484  *
7485  * This function copies the stage display pipe configuration to the real one.
7486  */
7487 static void intel_modeset_commit_output_state(struct drm_device *dev)
7488 {
7489         struct intel_encoder *encoder;
7490         struct intel_connector *connector;
7491
7492         list_for_each_entry(connector, &dev->mode_config.connector_list,
7493                             base.head) {
7494                 connector->base.encoder = &connector->new_encoder->base;
7495         }
7496
7497         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7498                             base.head) {
7499                 encoder->base.crtc = &encoder->new_crtc->base;
7500         }
7501 }
7502
7503 static struct drm_display_mode *
7504 intel_modeset_adjusted_mode(struct drm_crtc *crtc,
7505                             struct drm_display_mode *mode)
7506 {
7507         struct drm_device *dev = crtc->dev;
7508         struct drm_display_mode *adjusted_mode;
7509         struct drm_encoder_helper_funcs *encoder_funcs;
7510         struct intel_encoder *encoder;
7511
7512         adjusted_mode = drm_mode_duplicate(dev, mode);
7513         if (!adjusted_mode)
7514                 return ERR_PTR(-ENOMEM);
7515
7516         /* Pass our mode to the connectors and the CRTC to give them a chance to
7517          * adjust it according to limitations or connector properties, and also
7518          * a chance to reject the mode entirely.
7519          */
7520         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7521                             base.head) {
7522
7523                 if (&encoder->new_crtc->base != crtc)
7524                         continue;
7525                 encoder_funcs = encoder->base.helper_private;
7526                 if (!(encoder_funcs->mode_fixup(&encoder->base, mode,
7527                                                 adjusted_mode))) {
7528                         DRM_DEBUG_KMS("Encoder fixup failed\n");
7529                         goto fail;
7530                 }
7531         }
7532
7533         if (!(intel_crtc_mode_fixup(crtc, mode, adjusted_mode))) {
7534                 DRM_DEBUG_KMS("CRTC fixup failed\n");
7535                 goto fail;
7536         }
7537         DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
7538
7539         return adjusted_mode;
7540 fail:
7541         drm_mode_destroy(dev, adjusted_mode);
7542         return ERR_PTR(-EINVAL);
7543 }
7544
7545 /* Computes which crtcs are affected and sets the relevant bits in the mask. For
7546  * simplicity we use the crtc's pipe number (because it's easier to obtain). */
7547 static void
7548 intel_modeset_affected_pipes(struct drm_crtc *crtc, unsigned *modeset_pipes,
7549                              unsigned *prepare_pipes, unsigned *disable_pipes)
7550 {
7551         struct intel_crtc *intel_crtc;
7552         struct drm_device *dev = crtc->dev;
7553         struct intel_encoder *encoder;
7554         struct intel_connector *connector;
7555         struct drm_crtc *tmp_crtc;
7556
7557         *disable_pipes = *modeset_pipes = *prepare_pipes = 0;
7558
7559         /* Check which crtcs have changed outputs connected to them, these need
7560          * to be part of the prepare_pipes mask. We don't (yet) support global
7561          * modeset across multiple crtcs, so modeset_pipes will only have one
7562          * bit set at most. */
7563         list_for_each_entry(connector, &dev->mode_config.connector_list,
7564                             base.head) {
7565                 if (connector->base.encoder == &connector->new_encoder->base)
7566                         continue;
7567
7568                 if (connector->base.encoder) {
7569                         tmp_crtc = connector->base.encoder->crtc;
7570
7571                         *prepare_pipes |= 1 << to_intel_crtc(tmp_crtc)->pipe;
7572                 }
7573
7574                 if (connector->new_encoder)
7575                         *prepare_pipes |=
7576                                 1 << connector->new_encoder->new_crtc->pipe;
7577         }
7578
7579         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7580                             base.head) {
7581                 if (encoder->base.crtc == &encoder->new_crtc->base)
7582                         continue;
7583
7584                 if (encoder->base.crtc) {
7585                         tmp_crtc = encoder->base.crtc;
7586
7587                         *prepare_pipes |= 1 << to_intel_crtc(tmp_crtc)->pipe;
7588                 }
7589
7590                 if (encoder->new_crtc)
7591                         *prepare_pipes |= 1 << encoder->new_crtc->pipe;
7592         }
7593
7594         /* Check for any pipes that will be fully disabled ... */
7595         list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list,
7596                             base.head) {
7597                 bool used = false;
7598
7599                 /* Don't try to disable disabled crtcs. */
7600                 if (!intel_crtc->base.enabled)
7601                         continue;
7602
7603                 list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7604                                     base.head) {
7605                         if (encoder->new_crtc == intel_crtc)
7606                                 used = true;
7607                 }
7608
7609                 if (!used)
7610                         *disable_pipes |= 1 << intel_crtc->pipe;
7611         }
7612
7613
7614         /* set_mode is also used to update properties on life display pipes. */
7615         intel_crtc = to_intel_crtc(crtc);
7616         if (crtc->enabled)
7617                 *prepare_pipes |= 1 << intel_crtc->pipe;
7618
7619         /* We only support modeset on one single crtc, hence we need to do that
7620          * only for the passed in crtc iff we change anything else than just
7621          * disable crtcs.
7622          *
7623          * This is actually not true, to be fully compatible with the old crtc
7624          * helper we automatically disable _any_ output (i.e. doesn't need to be
7625          * connected to the crtc we're modesetting on) if it's disconnected.
7626          * Which is a rather nutty api (since changed the output configuration
7627          * without userspace's explicit request can lead to confusion), but
7628          * alas. Hence we currently need to modeset on all pipes we prepare. */
7629         if (*prepare_pipes)
7630                 *modeset_pipes = *prepare_pipes;
7631
7632         /* ... and mask these out. */
7633         *modeset_pipes &= ~(*disable_pipes);
7634         *prepare_pipes &= ~(*disable_pipes);
7635 }
7636
7637 static bool intel_crtc_in_use(struct drm_crtc *crtc)
7638 {
7639         struct drm_encoder *encoder;
7640         struct drm_device *dev = crtc->dev;
7641
7642         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
7643                 if (encoder->crtc == crtc)
7644                         return true;
7645
7646         return false;
7647 }
7648
7649 static void
7650 intel_modeset_update_state(struct drm_device *dev, unsigned prepare_pipes)
7651 {
7652         struct intel_encoder *intel_encoder;
7653         struct intel_crtc *intel_crtc;
7654         struct drm_connector *connector;
7655
7656         list_for_each_entry(intel_encoder, &dev->mode_config.encoder_list,
7657                             base.head) {
7658                 if (!intel_encoder->base.crtc)
7659                         continue;
7660
7661                 intel_crtc = to_intel_crtc(intel_encoder->base.crtc);
7662
7663                 if (prepare_pipes & (1 << intel_crtc->pipe))
7664                         intel_encoder->connectors_active = false;
7665         }
7666
7667         intel_modeset_commit_output_state(dev);
7668
7669         /* Update computed state. */
7670         list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list,
7671                             base.head) {
7672                 intel_crtc->base.enabled = intel_crtc_in_use(&intel_crtc->base);
7673         }
7674
7675         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
7676                 if (!connector->encoder || !connector->encoder->crtc)
7677                         continue;
7678
7679                 intel_crtc = to_intel_crtc(connector->encoder->crtc);
7680
7681                 if (prepare_pipes & (1 << intel_crtc->pipe)) {
7682                         struct drm_property *dpms_property =
7683                                 dev->mode_config.dpms_property;
7684
7685                         connector->dpms = DRM_MODE_DPMS_ON;
7686                         drm_object_property_set_value(&connector->base,
7687                                                          dpms_property,
7688                                                          DRM_MODE_DPMS_ON);
7689
7690                         intel_encoder = to_intel_encoder(connector->encoder);
7691                         intel_encoder->connectors_active = true;
7692                 }
7693         }
7694
7695 }
7696
7697 #define for_each_intel_crtc_masked(dev, mask, intel_crtc) \
7698         list_for_each_entry((intel_crtc), \
7699                             &(dev)->mode_config.crtc_list, \
7700                             base.head) \
7701                 if (mask & (1 <<(intel_crtc)->pipe)) \
7702
7703 void
7704 intel_modeset_check_state(struct drm_device *dev)
7705 {
7706         struct intel_crtc *crtc;
7707         struct intel_encoder *encoder;
7708         struct intel_connector *connector;
7709
7710         list_for_each_entry(connector, &dev->mode_config.connector_list,
7711                             base.head) {
7712                 /* This also checks the encoder/connector hw state with the
7713                  * ->get_hw_state callbacks. */
7714                 intel_connector_check_state(connector);
7715
7716                 WARN(&connector->new_encoder->base != connector->base.encoder,
7717                      "connector's staged encoder doesn't match current encoder\n");
7718         }
7719
7720         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7721                             base.head) {
7722                 bool enabled = false;
7723                 bool active = false;
7724                 enum pipe pipe, tracked_pipe;
7725
7726                 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n",
7727                               encoder->base.base.id,
7728                               drm_get_encoder_name(&encoder->base));
7729
7730                 WARN(&encoder->new_crtc->base != encoder->base.crtc,
7731                      "encoder's stage crtc doesn't match current crtc\n");
7732                 WARN(encoder->connectors_active && !encoder->base.crtc,
7733                      "encoder's active_connectors set, but no crtc\n");
7734
7735                 list_for_each_entry(connector, &dev->mode_config.connector_list,
7736                                     base.head) {
7737                         if (connector->base.encoder != &encoder->base)
7738                                 continue;
7739                         enabled = true;
7740                         if (connector->base.dpms != DRM_MODE_DPMS_OFF)
7741                                 active = true;
7742                 }
7743                 WARN(!!encoder->base.crtc != enabled,
7744                      "encoder's enabled state mismatch "
7745                      "(expected %i, found %i)\n",
7746                      !!encoder->base.crtc, enabled);
7747                 WARN(active && !encoder->base.crtc,
7748                      "active encoder with no crtc\n");
7749
7750                 WARN(encoder->connectors_active != active,
7751                      "encoder's computed active state doesn't match tracked active state "
7752                      "(expected %i, found %i)\n", active, encoder->connectors_active);
7753
7754                 active = encoder->get_hw_state(encoder, &pipe);
7755                 WARN(active != encoder->connectors_active,
7756                      "encoder's hw state doesn't match sw tracking "
7757                      "(expected %i, found %i)\n",
7758                      encoder->connectors_active, active);
7759
7760                 if (!encoder->base.crtc)
7761                         continue;
7762
7763                 tracked_pipe = to_intel_crtc(encoder->base.crtc)->pipe;
7764                 WARN(active && pipe != tracked_pipe,
7765                      "active encoder's pipe doesn't match"
7766                      "(expected %i, found %i)\n",
7767                      tracked_pipe, pipe);
7768
7769         }
7770
7771         list_for_each_entry(crtc, &dev->mode_config.crtc_list,
7772                             base.head) {
7773                 bool enabled = false;
7774                 bool active = false;
7775
7776                 DRM_DEBUG_KMS("[CRTC:%d]\n",
7777                               crtc->base.base.id);
7778
7779                 WARN(crtc->active && !crtc->base.enabled,
7780                      "active crtc, but not enabled in sw tracking\n");
7781
7782                 list_for_each_entry(encoder, &dev->mode_config.encoder_list,
7783                                     base.head) {
7784                         if (encoder->base.crtc != &crtc->base)
7785                                 continue;
7786                         enabled = true;
7787                         if (encoder->connectors_active)
7788                                 active = true;
7789                 }
7790                 WARN(active != crtc->active,
7791                      "crtc's computed active state doesn't match tracked active state "
7792                      "(expected %i, found %i)\n", active, crtc->active);
7793                 WARN(enabled != crtc->base.enabled,
7794                      "crtc's computed enabled state doesn't match tracked enabled state "
7795                      "(expected %i, found %i)\n", enabled, crtc->base.enabled);
7796
7797                 assert_pipe(dev->dev_private, crtc->pipe, crtc->active);
7798         }
7799 }
7800
7801 int intel_set_mode(struct drm_crtc *crtc,
7802                    struct drm_display_mode *mode,
7803                    int x, int y, struct drm_framebuffer *fb)
7804 {
7805         struct drm_device *dev = crtc->dev;
7806         drm_i915_private_t *dev_priv = dev->dev_private;
7807         struct drm_display_mode *adjusted_mode, *saved_mode, *saved_hwmode;
7808         struct intel_crtc *intel_crtc;
7809         unsigned disable_pipes, prepare_pipes, modeset_pipes;
7810         int ret = 0;
7811
7812         saved_mode = kmalloc(2 * sizeof(*saved_mode), GFP_KERNEL);
7813         if (!saved_mode)
7814                 return -ENOMEM;
7815         saved_hwmode = saved_mode + 1;
7816
7817         intel_modeset_affected_pipes(crtc, &modeset_pipes,
7818                                      &prepare_pipes, &disable_pipes);
7819
7820         DRM_DEBUG_KMS("set mode pipe masks: modeset: %x, prepare: %x, disable: %x\n",
7821                       modeset_pipes, prepare_pipes, disable_pipes);
7822
7823         for_each_intel_crtc_masked(dev, disable_pipes, intel_crtc)
7824                 intel_crtc_disable(&intel_crtc->base);
7825
7826         *saved_hwmode = crtc->hwmode;
7827         *saved_mode = crtc->mode;
7828
7829         /* Hack: Because we don't (yet) support global modeset on multiple
7830          * crtcs, we don't keep track of the new mode for more than one crtc.
7831          * Hence simply check whether any bit is set in modeset_pipes in all the
7832          * pieces of code that are not yet converted to deal with mutliple crtcs
7833          * changing their mode at the same time. */
7834         adjusted_mode = NULL;
7835         if (modeset_pipes) {
7836                 adjusted_mode = intel_modeset_adjusted_mode(crtc, mode);
7837                 if (IS_ERR(adjusted_mode)) {
7838                         ret = PTR_ERR(adjusted_mode);
7839                         goto out;
7840                 }
7841         }
7842
7843         for_each_intel_crtc_masked(dev, prepare_pipes, intel_crtc) {
7844                 if (intel_crtc->base.enabled)
7845                         dev_priv->display.crtc_disable(&intel_crtc->base);
7846         }
7847
7848         /* crtc->mode is already used by the ->mode_set callbacks, hence we need
7849          * to set it here already despite that we pass it down the callchain.
7850          */
7851         if (modeset_pipes)
7852                 crtc->mode = *mode;
7853
7854         /* Only after disabling all output pipelines that will be changed can we
7855          * update the the output configuration. */
7856         intel_modeset_update_state(dev, prepare_pipes);
7857
7858         if (dev_priv->display.modeset_global_resources)
7859                 dev_priv->display.modeset_global_resources(dev);
7860
7861         /* Set up the DPLL and any encoders state that needs to adjust or depend
7862          * on the DPLL.
7863          */
7864         for_each_intel_crtc_masked(dev, modeset_pipes, intel_crtc) {
7865                 ret = intel_crtc_mode_set(&intel_crtc->base,
7866                                           mode, adjusted_mode,
7867                                           x, y, fb);
7868                 if (ret)
7869                         goto done;
7870         }
7871
7872         /* Now enable the clocks, plane, pipe, and connectors that we set up. */
7873         for_each_intel_crtc_masked(dev, prepare_pipes, intel_crtc)
7874                 dev_priv->display.crtc_enable(&intel_crtc->base);
7875
7876         if (modeset_pipes) {
7877                 /* Store real post-adjustment hardware mode. */
7878                 crtc->hwmode = *adjusted_mode;
7879
7880                 /* Calculate and store various constants which
7881                  * are later needed by vblank and swap-completion
7882                  * timestamping. They are derived from true hwmode.
7883                  */
7884                 drm_calc_timestamping_constants(crtc);
7885         }
7886
7887         /* FIXME: add subpixel order */
7888 done:
7889         drm_mode_destroy(dev, adjusted_mode);
7890         if (ret && crtc->enabled) {
7891                 crtc->hwmode = *saved_hwmode;
7892                 crtc->mode = *saved_mode;
7893         } else {
7894                 intel_modeset_check_state(dev);
7895         }
7896
7897 out:
7898         kfree(saved_mode);
7899         return ret;
7900 }
7901
7902 void intel_crtc_restore_mode(struct drm_crtc *crtc)
7903 {
7904         intel_set_mode(crtc, &crtc->mode, crtc->x, crtc->y, crtc->fb);
7905 }
7906
7907 #undef for_each_intel_crtc_masked
7908
7909 static void intel_set_config_free(struct intel_set_config *config)
7910 {
7911         if (!config)
7912                 return;
7913
7914         kfree(config->save_connector_encoders);
7915         kfree(config->save_encoder_crtcs);
7916         kfree(config);
7917 }
7918
7919 static int intel_set_config_save_state(struct drm_device *dev,
7920                                        struct intel_set_config *config)
7921 {
7922         struct drm_encoder *encoder;
7923         struct drm_connector *connector;
7924         int count;
7925
7926         config->save_encoder_crtcs =
7927                 kcalloc(dev->mode_config.num_encoder,
7928                         sizeof(struct drm_crtc *), GFP_KERNEL);
7929         if (!config->save_encoder_crtcs)
7930                 return -ENOMEM;
7931
7932         config->save_connector_encoders =
7933                 kcalloc(dev->mode_config.num_connector,
7934                         sizeof(struct drm_encoder *), GFP_KERNEL);
7935         if (!config->save_connector_encoders)
7936                 return -ENOMEM;
7937
7938         /* Copy data. Note that driver private data is not affected.
7939          * Should anything bad happen only the expected state is
7940          * restored, not the drivers personal bookkeeping.
7941          */
7942         count = 0;
7943         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
7944                 config->save_encoder_crtcs[count++] = encoder->crtc;
7945         }
7946
7947         count = 0;
7948         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
7949                 config->save_connector_encoders[count++] = connector->encoder;
7950         }
7951
7952         return 0;
7953 }
7954
7955 static void intel_set_config_restore_state(struct drm_device *dev,
7956                                            struct intel_set_config *config)
7957 {
7958         struct intel_encoder *encoder;
7959         struct intel_connector *connector;
7960         int count;
7961
7962         count = 0;
7963         list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
7964                 encoder->new_crtc =
7965                         to_intel_crtc(config->save_encoder_crtcs[count++]);
7966         }
7967
7968         count = 0;
7969         list_for_each_entry(connector, &dev->mode_config.connector_list, base.head) {
7970                 connector->new_encoder =
7971                         to_intel_encoder(config->save_connector_encoders[count++]);
7972         }
7973 }
7974
7975 static void
7976 intel_set_config_compute_mode_changes(struct drm_mode_set *set,
7977                                       struct intel_set_config *config)
7978 {
7979
7980         /* We should be able to check here if the fb has the same properties
7981          * and then just flip_or_move it */
7982         if (set->crtc->fb != set->fb) {
7983                 /* If we have no fb then treat it as a full mode set */
7984                 if (set->crtc->fb == NULL) {
7985                         DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
7986                         config->mode_changed = true;
7987                 } else if (set->fb == NULL) {
7988                         config->mode_changed = true;
7989                 } else if (set->fb->depth != set->crtc->fb->depth) {
7990                         config->mode_changed = true;
7991                 } else if (set->fb->bits_per_pixel !=
7992                            set->crtc->fb->bits_per_pixel) {
7993                         config->mode_changed = true;
7994                 } else
7995                         config->fb_changed = true;
7996         }
7997
7998         if (set->fb && (set->x != set->crtc->x || set->y != set->crtc->y))
7999                 config->fb_changed = true;
8000
8001         if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
8002                 DRM_DEBUG_KMS("modes are different, full mode set\n");
8003                 drm_mode_debug_printmodeline(&set->crtc->mode);
8004                 drm_mode_debug_printmodeline(set->mode);
8005                 config->mode_changed = true;
8006         }
8007 }
8008
8009 static int
8010 intel_modeset_stage_output_state(struct drm_device *dev,
8011                                  struct drm_mode_set *set,
8012                                  struct intel_set_config *config)
8013 {
8014         struct drm_crtc *new_crtc;
8015         struct intel_connector *connector;
8016         struct intel_encoder *encoder;
8017         int count, ro;
8018
8019         /* The upper layers ensure that we either disable a crtc or have a list
8020          * of connectors. For paranoia, double-check this. */
8021         WARN_ON(!set->fb && (set->num_connectors != 0));
8022         WARN_ON(set->fb && (set->num_connectors == 0));
8023
8024         count = 0;
8025         list_for_each_entry(connector, &dev->mode_config.connector_list,
8026                             base.head) {
8027                 /* Otherwise traverse passed in connector list and get encoders
8028                  * for them. */
8029                 for (ro = 0; ro < set->num_connectors; ro++) {
8030                         if (set->connectors[ro] == &connector->base) {
8031                                 connector->new_encoder = connector->encoder;
8032                                 break;
8033                         }
8034                 }
8035
8036                 /* If we disable the crtc, disable all its connectors. Also, if
8037                  * the connector is on the changing crtc but not on the new
8038                  * connector list, disable it. */
8039                 if ((!set->fb || ro == set->num_connectors) &&
8040                     connector->base.encoder &&
8041                     connector->base.encoder->crtc == set->crtc) {
8042                         connector->new_encoder = NULL;
8043
8044                         DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
8045                                 connector->base.base.id,
8046                                 drm_get_connector_name(&connector->base));
8047                 }
8048
8049
8050                 if (&connector->new_encoder->base != connector->base.encoder) {
8051                         DRM_DEBUG_KMS("encoder changed, full mode switch\n");
8052                         config->mode_changed = true;
8053                 }
8054         }
8055         /* connector->new_encoder is now updated for all connectors. */
8056
8057         /* Update crtc of enabled connectors. */
8058         count = 0;
8059         list_for_each_entry(connector, &dev->mode_config.connector_list,
8060                             base.head) {
8061                 if (!connector->new_encoder)
8062                         continue;
8063
8064                 new_crtc = connector->new_encoder->base.crtc;
8065
8066                 for (ro = 0; ro < set->num_connectors; ro++) {
8067                         if (set->connectors[ro] == &connector->base)
8068                                 new_crtc = set->crtc;
8069                 }
8070
8071                 /* Make sure the new CRTC will work with the encoder */
8072                 if (!intel_encoder_crtc_ok(&connector->new_encoder->base,
8073                                            new_crtc)) {
8074                         return -EINVAL;
8075                 }
8076                 connector->encoder->new_crtc = to_intel_crtc(new_crtc);
8077
8078                 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
8079                         connector->base.base.id,
8080                         drm_get_connector_name(&connector->base),
8081                         new_crtc->base.id);
8082         }
8083
8084         /* Check for any encoders that needs to be disabled. */
8085         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
8086                             base.head) {
8087                 list_for_each_entry(connector,
8088                                     &dev->mode_config.connector_list,
8089                                     base.head) {
8090                         if (connector->new_encoder == encoder) {
8091                                 WARN_ON(!connector->new_encoder->new_crtc);
8092
8093                                 goto next_encoder;
8094                         }
8095                 }
8096                 encoder->new_crtc = NULL;
8097 next_encoder:
8098                 /* Only now check for crtc changes so we don't miss encoders
8099                  * that will be disabled. */
8100                 if (&encoder->new_crtc->base != encoder->base.crtc) {
8101                         DRM_DEBUG_KMS("crtc changed, full mode switch\n");
8102                         config->mode_changed = true;
8103                 }
8104         }
8105         /* Now we've also updated encoder->new_crtc for all encoders. */
8106
8107         return 0;
8108 }
8109
8110 static int intel_crtc_set_config(struct drm_mode_set *set)
8111 {
8112         struct drm_device *dev;
8113         struct drm_mode_set save_set;
8114         struct intel_set_config *config;
8115         int ret;
8116
8117         BUG_ON(!set);
8118         BUG_ON(!set->crtc);
8119         BUG_ON(!set->crtc->helper_private);
8120
8121         /* Enforce sane interface api - has been abused by the fb helper. */
8122         BUG_ON(!set->mode && set->fb);
8123         BUG_ON(set->fb && set->num_connectors == 0);
8124
8125         if (set->fb) {
8126                 DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
8127                                 set->crtc->base.id, set->fb->base.id,
8128                                 (int)set->num_connectors, set->x, set->y);
8129         } else {
8130                 DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
8131         }
8132
8133         dev = set->crtc->dev;
8134
8135         ret = -ENOMEM;
8136         config = kzalloc(sizeof(*config), GFP_KERNEL);
8137         if (!config)
8138                 goto out_config;
8139
8140         ret = intel_set_config_save_state(dev, config);
8141         if (ret)
8142                 goto out_config;
8143
8144         save_set.crtc = set->crtc;
8145         save_set.mode = &set->crtc->mode;
8146         save_set.x = set->crtc->x;
8147         save_set.y = set->crtc->y;
8148         save_set.fb = set->crtc->fb;
8149
8150         /* Compute whether we need a full modeset, only an fb base update or no
8151          * change at all. In the future we might also check whether only the
8152          * mode changed, e.g. for LVDS where we only change the panel fitter in
8153          * such cases. */
8154         intel_set_config_compute_mode_changes(set, config);
8155
8156         ret = intel_modeset_stage_output_state(dev, set, config);
8157         if (ret)
8158                 goto fail;
8159
8160         if (config->mode_changed) {
8161                 if (set->mode) {
8162                         DRM_DEBUG_KMS("attempting to set mode from"
8163                                         " userspace\n");
8164                         drm_mode_debug_printmodeline(set->mode);
8165                 }
8166
8167                 ret = intel_set_mode(set->crtc, set->mode,
8168                                      set->x, set->y, set->fb);
8169                 if (ret) {
8170                         DRM_ERROR("failed to set mode on [CRTC:%d], err = %d\n",
8171                                   set->crtc->base.id, ret);
8172                         goto fail;
8173                 }
8174         } else if (config->fb_changed) {
8175                 intel_crtc_wait_for_pending_flips(set->crtc);
8176
8177                 ret = intel_pipe_set_base(set->crtc,
8178                                           set->x, set->y, set->fb);
8179         }
8180
8181         intel_set_config_free(config);
8182
8183         return 0;
8184
8185 fail:
8186         intel_set_config_restore_state(dev, config);
8187
8188         /* Try to restore the config */
8189         if (config->mode_changed &&
8190             intel_set_mode(save_set.crtc, save_set.mode,
8191                            save_set.x, save_set.y, save_set.fb))
8192                 DRM_ERROR("failed to restore config after modeset failure\n");
8193
8194 out_config:
8195         intel_set_config_free(config);
8196         return ret;
8197 }
8198
8199 static const struct drm_crtc_funcs intel_crtc_funcs = {
8200         .cursor_set = intel_crtc_cursor_set,
8201         .cursor_move = intel_crtc_cursor_move,
8202         .gamma_set = intel_crtc_gamma_set,
8203         .set_config = intel_crtc_set_config,
8204         .destroy = intel_crtc_destroy,
8205         .page_flip = intel_crtc_page_flip,
8206 };
8207
8208 static void intel_cpu_pll_init(struct drm_device *dev)
8209 {
8210         if (HAS_DDI(dev))
8211                 intel_ddi_pll_init(dev);
8212 }
8213
8214 static void intel_pch_pll_init(struct drm_device *dev)
8215 {
8216         drm_i915_private_t *dev_priv = dev->dev_private;
8217         int i;
8218
8219         if (dev_priv->num_pch_pll == 0) {
8220                 DRM_DEBUG_KMS("No PCH PLLs on this hardware, skipping initialisation\n");
8221                 return;
8222         }
8223
8224         for (i = 0; i < dev_priv->num_pch_pll; i++) {
8225                 dev_priv->pch_plls[i].pll_reg = _PCH_DPLL(i);
8226                 dev_priv->pch_plls[i].fp0_reg = _PCH_FP0(i);
8227                 dev_priv->pch_plls[i].fp1_reg = _PCH_FP1(i);
8228         }
8229 }
8230
8231 static void intel_crtc_init(struct drm_device *dev, int pipe)
8232 {
8233         drm_i915_private_t *dev_priv = dev->dev_private;
8234         struct intel_crtc *intel_crtc;
8235         int i;
8236
8237         intel_crtc = kzalloc(sizeof(struct intel_crtc) + (INTELFB_CONN_LIMIT * sizeof(struct drm_connector *)), GFP_KERNEL);
8238         if (intel_crtc == NULL)
8239                 return;
8240
8241         drm_crtc_init(dev, &intel_crtc->base, &intel_crtc_funcs);
8242
8243         drm_mode_crtc_set_gamma_size(&intel_crtc->base, 256);
8244         for (i = 0; i < 256; i++) {
8245                 intel_crtc->lut_r[i] = i;
8246                 intel_crtc->lut_g[i] = i;
8247                 intel_crtc->lut_b[i] = i;
8248         }
8249
8250         /* Swap pipes & planes for FBC on pre-965 */
8251         intel_crtc->pipe = pipe;
8252         intel_crtc->plane = pipe;
8253         intel_crtc->cpu_transcoder = pipe;
8254         if (IS_MOBILE(dev) && IS_GEN3(dev)) {
8255                 DRM_DEBUG_KMS("swapping pipes & planes for FBC\n");
8256                 intel_crtc->plane = !pipe;
8257         }
8258
8259         BUG_ON(pipe >= ARRAY_SIZE(dev_priv->plane_to_crtc_mapping) ||
8260                dev_priv->plane_to_crtc_mapping[intel_crtc->plane] != NULL);
8261         dev_priv->plane_to_crtc_mapping[intel_crtc->plane] = &intel_crtc->base;
8262         dev_priv->pipe_to_crtc_mapping[intel_crtc->pipe] = &intel_crtc->base;
8263
8264         intel_crtc->bpp = 24; /* default for pre-Ironlake */
8265
8266         drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
8267 }
8268
8269 int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
8270                                 struct drm_file *file)
8271 {
8272         struct drm_i915_get_pipe_from_crtc_id *pipe_from_crtc_id = data;
8273         struct drm_mode_object *drmmode_obj;
8274         struct intel_crtc *crtc;
8275
8276         if (!drm_core_check_feature(dev, DRIVER_MODESET))
8277                 return -ENODEV;
8278
8279         drmmode_obj = drm_mode_object_find(dev, pipe_from_crtc_id->crtc_id,
8280                         DRM_MODE_OBJECT_CRTC);
8281
8282         if (!drmmode_obj) {
8283                 DRM_ERROR("no such CRTC id\n");
8284                 return -EINVAL;
8285         }
8286
8287         crtc = to_intel_crtc(obj_to_crtc(drmmode_obj));
8288         pipe_from_crtc_id->pipe = crtc->pipe;
8289
8290         return 0;
8291 }
8292
8293 static int intel_encoder_clones(struct intel_encoder *encoder)
8294 {
8295         struct drm_device *dev = encoder->base.dev;
8296         struct intel_encoder *source_encoder;
8297         int index_mask = 0;
8298         int entry = 0;
8299
8300         list_for_each_entry(source_encoder,
8301                             &dev->mode_config.encoder_list, base.head) {
8302
8303                 if (encoder == source_encoder)
8304                         index_mask |= (1 << entry);
8305
8306                 /* Intel hw has only one MUX where enocoders could be cloned. */
8307                 if (encoder->cloneable && source_encoder->cloneable)
8308                         index_mask |= (1 << entry);
8309
8310                 entry++;
8311         }
8312
8313         return index_mask;
8314 }
8315
8316 static bool has_edp_a(struct drm_device *dev)
8317 {
8318         struct drm_i915_private *dev_priv = dev->dev_private;
8319
8320         if (!IS_MOBILE(dev))
8321                 return false;
8322
8323         if ((I915_READ(DP_A) & DP_DETECTED) == 0)
8324                 return false;
8325
8326         if (IS_GEN5(dev) &&
8327             (I915_READ(ILK_DISPLAY_CHICKEN_FUSES) & ILK_eDP_A_DISABLE))
8328                 return false;
8329
8330         return true;
8331 }
8332
8333 static void intel_setup_outputs(struct drm_device *dev)
8334 {
8335         struct drm_i915_private *dev_priv = dev->dev_private;
8336         struct intel_encoder *encoder;
8337         bool dpd_is_edp = false;
8338         bool has_lvds;
8339
8340         has_lvds = intel_lvds_init(dev);
8341         if (!has_lvds && !HAS_PCH_SPLIT(dev)) {
8342                 /* disable the panel fitter on everything but LVDS */
8343                 I915_WRITE(PFIT_CONTROL, 0);
8344         }
8345
8346         if (!(HAS_DDI(dev) && (I915_READ(DDI_BUF_CTL(PORT_A)) & DDI_A_4_LANES)))
8347                 intel_crt_init(dev);
8348
8349         if (HAS_DDI(dev)) {
8350                 int found;
8351
8352                 /* Haswell uses DDI functions to detect digital outputs */
8353                 found = I915_READ(DDI_BUF_CTL_A) & DDI_INIT_DISPLAY_DETECTED;
8354                 /* DDI A only supports eDP */
8355                 if (found)
8356                         intel_ddi_init(dev, PORT_A);
8357
8358                 /* DDI B, C and D detection is indicated by the SFUSE_STRAP
8359                  * register */
8360                 found = I915_READ(SFUSE_STRAP);
8361
8362                 if (found & SFUSE_STRAP_DDIB_DETECTED)
8363                         intel_ddi_init(dev, PORT_B);
8364                 if (found & SFUSE_STRAP_DDIC_DETECTED)
8365                         intel_ddi_init(dev, PORT_C);
8366                 if (found & SFUSE_STRAP_DDID_DETECTED)
8367                         intel_ddi_init(dev, PORT_D);
8368         } else if (HAS_PCH_SPLIT(dev)) {
8369                 int found;
8370                 dpd_is_edp = intel_dpd_is_edp(dev);
8371
8372                 if (has_edp_a(dev))
8373                         intel_dp_init(dev, DP_A, PORT_A);
8374
8375                 if (I915_READ(PCH_HDMIB) & SDVO_DETECTED) {
8376                         /* PCH SDVOB multiplex with HDMIB */
8377                         found = intel_sdvo_init(dev, PCH_SDVOB, true);
8378                         if (!found)
8379                                 intel_hdmi_init(dev, PCH_HDMIB, PORT_B);
8380                         if (!found && (I915_READ(PCH_DP_B) & DP_DETECTED))
8381                                 intel_dp_init(dev, PCH_DP_B, PORT_B);
8382                 }
8383
8384                 if (I915_READ(PCH_HDMIC) & SDVO_DETECTED)
8385                         intel_hdmi_init(dev, PCH_HDMIC, PORT_C);
8386
8387                 if (!dpd_is_edp && I915_READ(PCH_HDMID) & SDVO_DETECTED)
8388                         intel_hdmi_init(dev, PCH_HDMID, PORT_D);
8389
8390                 if (I915_READ(PCH_DP_C) & DP_DETECTED)
8391                         intel_dp_init(dev, PCH_DP_C, PORT_C);
8392
8393                 if (I915_READ(PCH_DP_D) & DP_DETECTED)
8394                         intel_dp_init(dev, PCH_DP_D, PORT_D);
8395         } else if (IS_VALLEYVIEW(dev)) {
8396                 /* Check for built-in panel first. Shares lanes with HDMI on SDVOC */
8397                 if (I915_READ(VLV_DISPLAY_BASE + DP_C) & DP_DETECTED)
8398                         intel_dp_init(dev, VLV_DISPLAY_BASE + DP_C, PORT_C);
8399
8400                 if (I915_READ(VLV_DISPLAY_BASE + GEN4_HDMIB) & SDVO_DETECTED) {
8401                         intel_hdmi_init(dev, VLV_DISPLAY_BASE + GEN4_HDMIB,
8402                                         PORT_B);
8403                         if (I915_READ(VLV_DISPLAY_BASE + DP_B) & DP_DETECTED)
8404                                 intel_dp_init(dev, VLV_DISPLAY_BASE + DP_B, PORT_B);
8405                 }
8406
8407                 if (I915_READ(VLV_DISPLAY_BASE + GEN4_HDMIC) & SDVO_DETECTED)
8408                         intel_hdmi_init(dev, VLV_DISPLAY_BASE + GEN4_HDMIC,
8409                                         PORT_C);
8410
8411         } else if (SUPPORTS_DIGITAL_OUTPUTS(dev)) {
8412                 bool found = false;
8413
8414                 if (I915_READ(GEN3_SDVOB) & SDVO_DETECTED) {
8415                         DRM_DEBUG_KMS("probing SDVOB\n");
8416                         found = intel_sdvo_init(dev, GEN3_SDVOB, true);
8417                         if (!found && SUPPORTS_INTEGRATED_HDMI(dev)) {
8418                                 DRM_DEBUG_KMS("probing HDMI on SDVOB\n");
8419                                 intel_hdmi_init(dev, GEN4_HDMIB, PORT_B);
8420                         }
8421
8422                         if (!found && SUPPORTS_INTEGRATED_DP(dev)) {
8423                                 DRM_DEBUG_KMS("probing DP_B\n");
8424                                 intel_dp_init(dev, DP_B, PORT_B);
8425                         }
8426                 }
8427
8428                 /* Before G4X SDVOC doesn't have its own detect register */
8429
8430                 if (I915_READ(GEN3_SDVOB) & SDVO_DETECTED) {
8431                         DRM_DEBUG_KMS("probing SDVOC\n");
8432                         found = intel_sdvo_init(dev, GEN3_SDVOC, false);
8433                 }
8434
8435                 if (!found && (I915_READ(GEN3_SDVOC) & SDVO_DETECTED)) {
8436
8437                         if (SUPPORTS_INTEGRATED_HDMI(dev)) {
8438                                 DRM_DEBUG_KMS("probing HDMI on SDVOC\n");
8439                                 intel_hdmi_init(dev, GEN4_HDMIC, PORT_C);
8440                         }
8441                         if (SUPPORTS_INTEGRATED_DP(dev)) {
8442                                 DRM_DEBUG_KMS("probing DP_C\n");
8443                                 intel_dp_init(dev, DP_C, PORT_C);
8444                         }
8445                 }
8446
8447                 if (SUPPORTS_INTEGRATED_DP(dev) &&
8448                     (I915_READ(DP_D) & DP_DETECTED)) {
8449                         DRM_DEBUG_KMS("probing DP_D\n");
8450                         intel_dp_init(dev, DP_D, PORT_D);
8451                 }
8452         } else if (IS_GEN2(dev))
8453                 intel_dvo_init(dev);
8454
8455         if (SUPPORTS_TV(dev))
8456                 intel_tv_init(dev);
8457
8458         list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
8459                 encoder->base.possible_crtcs = encoder->crtc_mask;
8460                 encoder->base.possible_clones =
8461                         intel_encoder_clones(encoder);
8462         }
8463
8464         intel_init_pch_refclk(dev);
8465
8466         drm_helper_move_panel_connectors_to_head(dev);
8467 }
8468
8469 static void intel_user_framebuffer_destroy(struct drm_framebuffer *fb)
8470 {
8471         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
8472
8473         drm_framebuffer_cleanup(fb);
8474         drm_gem_object_unreference_unlocked(&intel_fb->obj->base);
8475
8476         kfree(intel_fb);
8477 }
8478
8479 static int intel_user_framebuffer_create_handle(struct drm_framebuffer *fb,
8480                                                 struct drm_file *file,
8481                                                 unsigned int *handle)
8482 {
8483         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
8484         struct drm_i915_gem_object *obj = intel_fb->obj;
8485
8486         return drm_gem_handle_create(file, &obj->base, handle);
8487 }
8488
8489 static const struct drm_framebuffer_funcs intel_fb_funcs = {
8490         .destroy = intel_user_framebuffer_destroy,
8491         .create_handle = intel_user_framebuffer_create_handle,
8492 };
8493
8494 int intel_framebuffer_init(struct drm_device *dev,
8495                            struct intel_framebuffer *intel_fb,
8496                            struct drm_mode_fb_cmd2 *mode_cmd,
8497                            struct drm_i915_gem_object *obj)
8498 {
8499         int ret;
8500
8501         if (obj->tiling_mode == I915_TILING_Y) {
8502                 DRM_DEBUG("hardware does not support tiling Y\n");
8503                 return -EINVAL;
8504         }
8505
8506         if (mode_cmd->pitches[0] & 63) {
8507                 DRM_DEBUG("pitch (%d) must be at least 64 byte aligned\n",
8508                           mode_cmd->pitches[0]);
8509                 return -EINVAL;
8510         }
8511
8512         /* FIXME <= Gen4 stride limits are bit unclear */
8513         if (mode_cmd->pitches[0] > 32768) {
8514                 DRM_DEBUG("pitch (%d) must be at less than 32768\n",
8515                           mode_cmd->pitches[0]);
8516                 return -EINVAL;
8517         }
8518
8519         if (obj->tiling_mode != I915_TILING_NONE &&
8520             mode_cmd->pitches[0] != obj->stride) {
8521                 DRM_DEBUG("pitch (%d) must match tiling stride (%d)\n",
8522                           mode_cmd->pitches[0], obj->stride);
8523                 return -EINVAL;
8524         }
8525
8526         /* Reject formats not supported by any plane early. */
8527         switch (mode_cmd->pixel_format) {
8528         case DRM_FORMAT_C8:
8529         case DRM_FORMAT_RGB565:
8530         case DRM_FORMAT_XRGB8888:
8531         case DRM_FORMAT_ARGB8888:
8532                 break;
8533         case DRM_FORMAT_XRGB1555:
8534         case DRM_FORMAT_ARGB1555:
8535                 if (INTEL_INFO(dev)->gen > 3) {
8536                         DRM_DEBUG("invalid format: 0x%08x\n", mode_cmd->pixel_format);
8537                         return -EINVAL;
8538                 }
8539                 break;
8540         case DRM_FORMAT_XBGR8888:
8541         case DRM_FORMAT_ABGR8888:
8542         case DRM_FORMAT_XRGB2101010:
8543         case DRM_FORMAT_ARGB2101010:
8544         case DRM_FORMAT_XBGR2101010:
8545         case DRM_FORMAT_ABGR2101010:
8546                 if (INTEL_INFO(dev)->gen < 4) {
8547                         DRM_DEBUG("invalid format: 0x%08x\n", mode_cmd->pixel_format);
8548                         return -EINVAL;
8549                 }
8550                 break;
8551         case DRM_FORMAT_YUYV:
8552         case DRM_FORMAT_UYVY:
8553         case DRM_FORMAT_YVYU:
8554         case DRM_FORMAT_VYUY:
8555                 if (INTEL_INFO(dev)->gen < 5) {
8556                         DRM_DEBUG("invalid format: 0x%08x\n", mode_cmd->pixel_format);
8557                         return -EINVAL;
8558                 }
8559                 break;
8560         default:
8561                 DRM_DEBUG("unsupported pixel format 0x%08x\n", mode_cmd->pixel_format);
8562                 return -EINVAL;
8563         }
8564
8565         /* FIXME need to adjust LINOFF/TILEOFF accordingly. */
8566         if (mode_cmd->offsets[0] != 0)
8567                 return -EINVAL;
8568
8569         drm_helper_mode_fill_fb_struct(&intel_fb->base, mode_cmd);
8570         intel_fb->obj = obj;
8571
8572         ret = drm_framebuffer_init(dev, &intel_fb->base, &intel_fb_funcs);
8573         if (ret) {
8574                 DRM_ERROR("framebuffer init failed %d\n", ret);
8575                 return ret;
8576         }
8577
8578         return 0;
8579 }
8580
8581 static struct drm_framebuffer *
8582 intel_user_framebuffer_create(struct drm_device *dev,
8583                               struct drm_file *filp,
8584                               struct drm_mode_fb_cmd2 *mode_cmd)
8585 {
8586         struct drm_i915_gem_object *obj;
8587
8588         obj = to_intel_bo(drm_gem_object_lookup(dev, filp,
8589                                                 mode_cmd->handles[0]));
8590         if (&obj->base == NULL)
8591                 return ERR_PTR(-ENOENT);
8592
8593         return intel_framebuffer_create(dev, mode_cmd, obj);
8594 }
8595
8596 static const struct drm_mode_config_funcs intel_mode_funcs = {
8597         .fb_create = intel_user_framebuffer_create,
8598         .output_poll_changed = intel_fb_output_poll_changed,
8599 };
8600
8601 /* Set up chip specific display functions */
8602 static void intel_init_display(struct drm_device *dev)
8603 {
8604         struct drm_i915_private *dev_priv = dev->dev_private;
8605
8606         /* We always want a DPMS function */
8607         if (HAS_DDI(dev)) {
8608                 dev_priv->display.crtc_mode_set = haswell_crtc_mode_set;
8609                 dev_priv->display.crtc_enable = haswell_crtc_enable;
8610                 dev_priv->display.crtc_disable = haswell_crtc_disable;
8611                 dev_priv->display.off = haswell_crtc_off;
8612                 dev_priv->display.update_plane = ironlake_update_plane;
8613         } else if (HAS_PCH_SPLIT(dev)) {
8614                 dev_priv->display.crtc_mode_set = ironlake_crtc_mode_set;
8615                 dev_priv->display.crtc_enable = ironlake_crtc_enable;
8616                 dev_priv->display.crtc_disable = ironlake_crtc_disable;
8617                 dev_priv->display.off = ironlake_crtc_off;
8618                 dev_priv->display.update_plane = ironlake_update_plane;
8619         } else {
8620                 dev_priv->display.crtc_mode_set = i9xx_crtc_mode_set;
8621                 dev_priv->display.crtc_enable = i9xx_crtc_enable;
8622                 dev_priv->display.crtc_disable = i9xx_crtc_disable;
8623                 dev_priv->display.off = i9xx_crtc_off;
8624                 dev_priv->display.update_plane = i9xx_update_plane;
8625         }
8626
8627         /* Returns the core display clock speed */
8628         if (IS_VALLEYVIEW(dev))
8629                 dev_priv->display.get_display_clock_speed =
8630                         valleyview_get_display_clock_speed;
8631         else if (IS_I945G(dev) || (IS_G33(dev) && !IS_PINEVIEW_M(dev)))
8632                 dev_priv->display.get_display_clock_speed =
8633                         i945_get_display_clock_speed;
8634         else if (IS_I915G(dev))
8635                 dev_priv->display.get_display_clock_speed =
8636                         i915_get_display_clock_speed;
8637         else if (IS_I945GM(dev) || IS_845G(dev) || IS_PINEVIEW_M(dev))
8638                 dev_priv->display.get_display_clock_speed =
8639                         i9xx_misc_get_display_clock_speed;
8640         else if (IS_I915GM(dev))
8641                 dev_priv->display.get_display_clock_speed =
8642                         i915gm_get_display_clock_speed;
8643         else if (IS_I865G(dev))
8644                 dev_priv->display.get_display_clock_speed =
8645                         i865_get_display_clock_speed;
8646         else if (IS_I85X(dev))
8647                 dev_priv->display.get_display_clock_speed =
8648                         i855_get_display_clock_speed;
8649         else /* 852, 830 */
8650                 dev_priv->display.get_display_clock_speed =
8651                         i830_get_display_clock_speed;
8652
8653         if (HAS_PCH_SPLIT(dev)) {
8654                 if (IS_GEN5(dev)) {
8655                         dev_priv->display.fdi_link_train = ironlake_fdi_link_train;
8656                         dev_priv->display.write_eld = ironlake_write_eld;
8657                 } else if (IS_GEN6(dev)) {
8658                         dev_priv->display.fdi_link_train = gen6_fdi_link_train;
8659                         dev_priv->display.write_eld = ironlake_write_eld;
8660                 } else if (IS_IVYBRIDGE(dev)) {
8661                         /* FIXME: detect B0+ stepping and use auto training */
8662                         dev_priv->display.fdi_link_train = ivb_manual_fdi_link_train;
8663                         dev_priv->display.write_eld = ironlake_write_eld;
8664                         dev_priv->display.modeset_global_resources =
8665                                 ivb_modeset_global_resources;
8666                 } else if (IS_HASWELL(dev)) {
8667                         dev_priv->display.fdi_link_train = hsw_fdi_link_train;
8668                         dev_priv->display.write_eld = haswell_write_eld;
8669                         dev_priv->display.modeset_global_resources =
8670                                 haswell_modeset_global_resources;
8671                 }
8672         } else if (IS_G4X(dev)) {
8673                 dev_priv->display.write_eld = g4x_write_eld;
8674         }
8675
8676         /* Default just returns -ENODEV to indicate unsupported */
8677         dev_priv->display.queue_flip = intel_default_queue_flip;
8678
8679         switch (INTEL_INFO(dev)->gen) {
8680         case 2:
8681                 dev_priv->display.queue_flip = intel_gen2_queue_flip;
8682                 break;
8683
8684         case 3:
8685                 dev_priv->display.queue_flip = intel_gen3_queue_flip;
8686                 break;
8687
8688         case 4:
8689         case 5:
8690                 dev_priv->display.queue_flip = intel_gen4_queue_flip;
8691                 break;
8692
8693         case 6:
8694                 dev_priv->display.queue_flip = intel_gen6_queue_flip;
8695                 break;
8696         case 7:
8697                 dev_priv->display.queue_flip = intel_gen7_queue_flip;
8698                 break;
8699         }
8700 }
8701
8702 /*
8703  * Some BIOSes insist on assuming the GPU's pipe A is enabled at suspend,
8704  * resume, or other times.  This quirk makes sure that's the case for
8705  * affected systems.
8706  */
8707 static void quirk_pipea_force(struct drm_device *dev)
8708 {
8709         struct drm_i915_private *dev_priv = dev->dev_private;
8710
8711         dev_priv->quirks |= QUIRK_PIPEA_FORCE;
8712         DRM_INFO("applying pipe a force quirk\n");
8713 }
8714
8715 /*
8716  * Some machines (Lenovo U160) do not work with SSC on LVDS for some reason
8717  */
8718 static void quirk_ssc_force_disable(struct drm_device *dev)
8719 {
8720         struct drm_i915_private *dev_priv = dev->dev_private;
8721         dev_priv->quirks |= QUIRK_LVDS_SSC_DISABLE;
8722         DRM_INFO("applying lvds SSC disable quirk\n");
8723 }
8724
8725 /*
8726  * A machine (e.g. Acer Aspire 5734Z) may need to invert the panel backlight
8727  * brightness value
8728  */
8729 static void quirk_invert_brightness(struct drm_device *dev)
8730 {
8731         struct drm_i915_private *dev_priv = dev->dev_private;
8732         dev_priv->quirks |= QUIRK_INVERT_BRIGHTNESS;
8733         DRM_INFO("applying inverted panel brightness quirk\n");
8734 }
8735
8736 struct intel_quirk {
8737         int device;
8738         int subsystem_vendor;
8739         int subsystem_device;
8740         void (*hook)(struct drm_device *dev);
8741 };
8742
8743 /* For systems that don't have a meaningful PCI subdevice/subvendor ID */
8744 struct intel_dmi_quirk {
8745         void (*hook)(struct drm_device *dev);
8746         const struct dmi_system_id (*dmi_id_list)[];
8747 };
8748
8749 static int intel_dmi_reverse_brightness(const struct dmi_system_id *id)
8750 {
8751         DRM_INFO("Backlight polarity reversed on %s\n", id->ident);
8752         return 1;
8753 }
8754
8755 static const struct intel_dmi_quirk intel_dmi_quirks[] = {
8756         {
8757                 .dmi_id_list = &(const struct dmi_system_id[]) {
8758                         {
8759                                 .callback = intel_dmi_reverse_brightness,
8760                                 .ident = "NCR Corporation",
8761                                 .matches = {DMI_MATCH(DMI_SYS_VENDOR, "NCR Corporation"),
8762                                             DMI_MATCH(DMI_PRODUCT_NAME, ""),
8763                                 },
8764                         },
8765                         { }  /* terminating entry */
8766                 },
8767                 .hook = quirk_invert_brightness,
8768         },
8769 };
8770
8771 static struct intel_quirk intel_quirks[] = {
8772         /* HP Mini needs pipe A force quirk (LP: #322104) */
8773         { 0x27ae, 0x103c, 0x361a, quirk_pipea_force },
8774
8775         /* Toshiba Protege R-205, S-209 needs pipe A force quirk */
8776         { 0x2592, 0x1179, 0x0001, quirk_pipea_force },
8777
8778         /* ThinkPad T60 needs pipe A force quirk (bug #16494) */
8779         { 0x2782, 0x17aa, 0x201a, quirk_pipea_force },
8780
8781         /* 830/845 need to leave pipe A & dpll A up */
8782         { 0x2562, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
8783         { 0x3577, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
8784
8785         /* Lenovo U160 cannot use SSC on LVDS */
8786         { 0x0046, 0x17aa, 0x3920, quirk_ssc_force_disable },
8787
8788         /* Sony Vaio Y cannot use SSC on LVDS */
8789         { 0x0046, 0x104d, 0x9076, quirk_ssc_force_disable },
8790
8791         /* Acer Aspire 5734Z must invert backlight brightness */
8792         { 0x2a42, 0x1025, 0x0459, quirk_invert_brightness },
8793
8794         /* Acer/eMachines G725 */
8795         { 0x2a42, 0x1025, 0x0210, quirk_invert_brightness },
8796
8797         /* Acer/eMachines e725 */
8798         { 0x2a42, 0x1025, 0x0212, quirk_invert_brightness },
8799
8800         /* Acer/Packard Bell NCL20 */
8801         { 0x2a42, 0x1025, 0x034b, quirk_invert_brightness },
8802
8803         /* Acer Aspire 4736Z */
8804         { 0x2a42, 0x1025, 0x0260, quirk_invert_brightness },
8805 };
8806
8807 static void intel_init_quirks(struct drm_device *dev)
8808 {
8809         struct pci_dev *d = dev->pdev;
8810         int i;
8811
8812         for (i = 0; i < ARRAY_SIZE(intel_quirks); i++) {
8813                 struct intel_quirk *q = &intel_quirks[i];
8814
8815                 if (d->device == q->device &&
8816                     (d->subsystem_vendor == q->subsystem_vendor ||
8817                      q->subsystem_vendor == PCI_ANY_ID) &&
8818                     (d->subsystem_device == q->subsystem_device ||
8819                      q->subsystem_device == PCI_ANY_ID))
8820                         q->hook(dev);
8821         }
8822         for (i = 0; i < ARRAY_SIZE(intel_dmi_quirks); i++) {
8823                 if (dmi_check_system(*intel_dmi_quirks[i].dmi_id_list) != 0)
8824                         intel_dmi_quirks[i].hook(dev);
8825         }
8826 }
8827
8828 /* Disable the VGA plane that we never use */
8829 static void i915_disable_vga(struct drm_device *dev)
8830 {
8831         struct drm_i915_private *dev_priv = dev->dev_private;
8832         u8 sr1;
8833         u32 vga_reg = i915_vgacntrl_reg(dev);
8834
8835         vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO);
8836         outb(SR01, VGA_SR_INDEX);
8837         sr1 = inb(VGA_SR_DATA);
8838         outb(sr1 | 1<<5, VGA_SR_DATA);
8839         vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
8840         udelay(300);
8841
8842         I915_WRITE(vga_reg, VGA_DISP_DISABLE);
8843         POSTING_READ(vga_reg);
8844 }
8845
8846 void intel_modeset_init_hw(struct drm_device *dev)
8847 {
8848         intel_init_power_well(dev);
8849
8850         intel_prepare_ddi(dev);
8851
8852         intel_init_clock_gating(dev);
8853
8854         mutex_lock(&dev->struct_mutex);
8855         intel_enable_gt_powersave(dev);
8856         mutex_unlock(&dev->struct_mutex);
8857 }
8858
8859 void intel_modeset_init(struct drm_device *dev)
8860 {
8861         struct drm_i915_private *dev_priv = dev->dev_private;
8862         int i, ret;
8863
8864         drm_mode_config_init(dev);
8865
8866         dev->mode_config.min_width = 0;
8867         dev->mode_config.min_height = 0;
8868
8869         dev->mode_config.preferred_depth = 24;
8870         dev->mode_config.prefer_shadow = 1;
8871
8872         dev->mode_config.funcs = &intel_mode_funcs;
8873
8874         intel_init_quirks(dev);
8875
8876         intel_init_pm(dev);
8877
8878         intel_init_display(dev);
8879
8880         if (IS_GEN2(dev)) {
8881                 dev->mode_config.max_width = 2048;
8882                 dev->mode_config.max_height = 2048;
8883         } else if (IS_GEN3(dev)) {
8884                 dev->mode_config.max_width = 4096;
8885                 dev->mode_config.max_height = 4096;
8886         } else {
8887                 dev->mode_config.max_width = 8192;
8888                 dev->mode_config.max_height = 8192;
8889         }
8890         dev->mode_config.fb_base = dev_priv->gtt.mappable_base;
8891
8892         DRM_DEBUG_KMS("%d display pipe%s available.\n",
8893                       dev_priv->num_pipe, dev_priv->num_pipe > 1 ? "s" : "");
8894
8895         for (i = 0; i < dev_priv->num_pipe; i++) {
8896                 intel_crtc_init(dev, i);
8897                 ret = intel_plane_init(dev, i);
8898                 if (ret)
8899                         DRM_DEBUG_KMS("plane %d init failed: %d\n", i, ret);
8900         }
8901
8902         intel_cpu_pll_init(dev);
8903         intel_pch_pll_init(dev);
8904
8905         /* Just disable it once at startup */
8906         i915_disable_vga(dev);
8907         intel_setup_outputs(dev);
8908
8909         /* Just in case the BIOS is doing something questionable. */
8910         intel_disable_fbc(dev);
8911 }
8912
8913 static void
8914 intel_connector_break_all_links(struct intel_connector *connector)
8915 {
8916         connector->base.dpms = DRM_MODE_DPMS_OFF;
8917         connector->base.encoder = NULL;
8918         connector->encoder->connectors_active = false;
8919         connector->encoder->base.crtc = NULL;
8920 }
8921
8922 static void intel_enable_pipe_a(struct drm_device *dev)
8923 {
8924         struct intel_connector *connector;
8925         struct drm_connector *crt = NULL;
8926         struct intel_load_detect_pipe load_detect_temp;
8927
8928         /* We can't just switch on the pipe A, we need to set things up with a
8929          * proper mode and output configuration. As a gross hack, enable pipe A
8930          * by enabling the load detect pipe once. */
8931         list_for_each_entry(connector,
8932                             &dev->mode_config.connector_list,
8933                             base.head) {
8934                 if (connector->encoder->type == INTEL_OUTPUT_ANALOG) {
8935                         crt = &connector->base;
8936                         break;
8937                 }
8938         }
8939
8940         if (!crt)
8941                 return;
8942
8943         if (intel_get_load_detect_pipe(crt, NULL, &load_detect_temp))
8944                 intel_release_load_detect_pipe(crt, &load_detect_temp);
8945
8946
8947 }
8948
8949 static bool
8950 intel_check_plane_mapping(struct intel_crtc *crtc)
8951 {
8952         struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
8953         u32 reg, val;
8954
8955         if (dev_priv->num_pipe == 1)
8956                 return true;
8957
8958         reg = DSPCNTR(!crtc->plane);
8959         val = I915_READ(reg);
8960
8961         if ((val & DISPLAY_PLANE_ENABLE) &&
8962             (!!(val & DISPPLANE_SEL_PIPE_MASK) == crtc->pipe))
8963                 return false;
8964
8965         return true;
8966 }
8967
8968 static void intel_sanitize_crtc(struct intel_crtc *crtc)
8969 {
8970         struct drm_device *dev = crtc->base.dev;
8971         struct drm_i915_private *dev_priv = dev->dev_private;
8972         u32 reg;
8973
8974         /* Clear any frame start delays used for debugging left by the BIOS */
8975         reg = PIPECONF(crtc->cpu_transcoder);
8976         I915_WRITE(reg, I915_READ(reg) & ~PIPECONF_FRAME_START_DELAY_MASK);
8977
8978         /* We need to sanitize the plane -> pipe mapping first because this will
8979          * disable the crtc (and hence change the state) if it is wrong. Note
8980          * that gen4+ has a fixed plane -> pipe mapping.  */
8981         if (INTEL_INFO(dev)->gen < 4 && !intel_check_plane_mapping(crtc)) {
8982                 struct intel_connector *connector;
8983                 bool plane;
8984
8985                 DRM_DEBUG_KMS("[CRTC:%d] wrong plane connection detected!\n",
8986                               crtc->base.base.id);
8987
8988                 /* Pipe has the wrong plane attached and the plane is active.
8989                  * Temporarily change the plane mapping and disable everything
8990                  * ...  */
8991                 plane = crtc->plane;
8992                 crtc->plane = !plane;
8993                 dev_priv->display.crtc_disable(&crtc->base);
8994                 crtc->plane = plane;
8995
8996                 /* ... and break all links. */
8997                 list_for_each_entry(connector, &dev->mode_config.connector_list,
8998                                     base.head) {
8999                         if (connector->encoder->base.crtc != &crtc->base)
9000                                 continue;
9001
9002                         intel_connector_break_all_links(connector);
9003                 }
9004
9005                 WARN_ON(crtc->active);
9006                 crtc->base.enabled = false;
9007         }
9008
9009         if (dev_priv->quirks & QUIRK_PIPEA_FORCE &&
9010             crtc->pipe == PIPE_A && !crtc->active) {
9011                 /* BIOS forgot to enable pipe A, this mostly happens after
9012                  * resume. Force-enable the pipe to fix this, the update_dpms
9013                  * call below we restore the pipe to the right state, but leave
9014                  * the required bits on. */
9015                 intel_enable_pipe_a(dev);
9016         }
9017
9018         /* Adjust the state of the output pipe according to whether we
9019          * have active connectors/encoders. */
9020         intel_crtc_update_dpms(&crtc->base);
9021
9022         if (crtc->active != crtc->base.enabled) {
9023                 struct intel_encoder *encoder;
9024
9025                 /* This can happen either due to bugs in the get_hw_state
9026                  * functions or because the pipe is force-enabled due to the
9027                  * pipe A quirk. */
9028                 DRM_DEBUG_KMS("[CRTC:%d] hw state adjusted, was %s, now %s\n",
9029                               crtc->base.base.id,
9030                               crtc->base.enabled ? "enabled" : "disabled",
9031                               crtc->active ? "enabled" : "disabled");
9032
9033                 crtc->base.enabled = crtc->active;
9034
9035                 /* Because we only establish the connector -> encoder ->
9036                  * crtc links if something is active, this means the
9037                  * crtc is now deactivated. Break the links. connector
9038                  * -> encoder links are only establish when things are
9039                  *  actually up, hence no need to break them. */
9040                 WARN_ON(crtc->active);
9041
9042                 for_each_encoder_on_crtc(dev, &crtc->base, encoder) {
9043                         WARN_ON(encoder->connectors_active);
9044                         encoder->base.crtc = NULL;
9045                 }
9046         }
9047 }
9048
9049 static void intel_sanitize_encoder(struct intel_encoder *encoder)
9050 {
9051         struct intel_connector *connector;
9052         struct drm_device *dev = encoder->base.dev;
9053
9054         /* We need to check both for a crtc link (meaning that the
9055          * encoder is active and trying to read from a pipe) and the
9056          * pipe itself being active. */
9057         bool has_active_crtc = encoder->base.crtc &&
9058                 to_intel_crtc(encoder->base.crtc)->active;
9059
9060         if (encoder->connectors_active && !has_active_crtc) {
9061                 DRM_DEBUG_KMS("[ENCODER:%d:%s] has active connectors but no active pipe!\n",
9062                               encoder->base.base.id,
9063                               drm_get_encoder_name(&encoder->base));
9064
9065                 /* Connector is active, but has no active pipe. This is
9066                  * fallout from our resume register restoring. Disable
9067                  * the encoder manually again. */
9068                 if (encoder->base.crtc) {
9069                         DRM_DEBUG_KMS("[ENCODER:%d:%s] manually disabled\n",
9070                                       encoder->base.base.id,
9071                                       drm_get_encoder_name(&encoder->base));
9072                         encoder->disable(encoder);
9073                 }
9074
9075                 /* Inconsistent output/port/pipe state happens presumably due to
9076                  * a bug in one of the get_hw_state functions. Or someplace else
9077                  * in our code, like the register restore mess on resume. Clamp
9078                  * things to off as a safer default. */
9079                 list_for_each_entry(connector,
9080                                     &dev->mode_config.connector_list,
9081                                     base.head) {
9082                         if (connector->encoder != encoder)
9083                                 continue;
9084
9085                         intel_connector_break_all_links(connector);
9086                 }
9087         }
9088         /* Enabled encoders without active connectors will be fixed in
9089          * the crtc fixup. */
9090 }
9091
9092 void i915_redisable_vga(struct drm_device *dev)
9093 {
9094         struct drm_i915_private *dev_priv = dev->dev_private;
9095         u32 vga_reg = i915_vgacntrl_reg(dev);
9096
9097         if (I915_READ(vga_reg) != VGA_DISP_DISABLE) {
9098                 DRM_DEBUG_KMS("Something enabled VGA plane, disabling it\n");
9099                 i915_disable_vga(dev);
9100         }
9101 }
9102
9103 /* Scan out the current hw modeset state, sanitizes it and maps it into the drm
9104  * and i915 state tracking structures. */
9105 void intel_modeset_setup_hw_state(struct drm_device *dev,
9106                                   bool force_restore)
9107 {
9108         struct drm_i915_private *dev_priv = dev->dev_private;
9109         enum pipe pipe;
9110         u32 tmp;
9111         struct intel_crtc *crtc;
9112         struct intel_encoder *encoder;
9113         struct intel_connector *connector;
9114
9115         if (HAS_DDI(dev)) {
9116                 tmp = I915_READ(TRANS_DDI_FUNC_CTL(TRANSCODER_EDP));
9117
9118                 if (tmp & TRANS_DDI_FUNC_ENABLE) {
9119                         switch (tmp & TRANS_DDI_EDP_INPUT_MASK) {
9120                         case TRANS_DDI_EDP_INPUT_A_ON:
9121                         case TRANS_DDI_EDP_INPUT_A_ONOFF:
9122                                 pipe = PIPE_A;
9123                                 break;
9124                         case TRANS_DDI_EDP_INPUT_B_ONOFF:
9125                                 pipe = PIPE_B;
9126                                 break;
9127                         case TRANS_DDI_EDP_INPUT_C_ONOFF:
9128                                 pipe = PIPE_C;
9129                                 break;
9130                         }
9131
9132                         crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
9133                         crtc->cpu_transcoder = TRANSCODER_EDP;
9134
9135                         DRM_DEBUG_KMS("Pipe %c using transcoder EDP\n",
9136                                       pipe_name(pipe));
9137                 }
9138         }
9139
9140         for_each_pipe(pipe) {
9141                 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
9142
9143                 tmp = I915_READ(PIPECONF(crtc->cpu_transcoder));
9144                 if (tmp & PIPECONF_ENABLE)
9145                         crtc->active = true;
9146                 else
9147                         crtc->active = false;
9148
9149                 crtc->base.enabled = crtc->active;
9150
9151                 DRM_DEBUG_KMS("[CRTC:%d] hw state readout: %s\n",
9152                               crtc->base.base.id,
9153                               crtc->active ? "enabled" : "disabled");
9154         }
9155
9156         if (HAS_DDI(dev))
9157                 intel_ddi_setup_hw_pll_state(dev);
9158
9159         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
9160                             base.head) {
9161                 pipe = 0;
9162
9163                 if (encoder->get_hw_state(encoder, &pipe)) {
9164                         encoder->base.crtc =
9165                                 dev_priv->pipe_to_crtc_mapping[pipe];
9166                 } else {
9167                         encoder->base.crtc = NULL;
9168                 }
9169
9170                 encoder->connectors_active = false;
9171                 DRM_DEBUG_KMS("[ENCODER:%d:%s] hw state readout: %s, pipe=%i\n",
9172                               encoder->base.base.id,
9173                               drm_get_encoder_name(&encoder->base),
9174                               encoder->base.crtc ? "enabled" : "disabled",
9175                               pipe);
9176         }
9177
9178         list_for_each_entry(connector, &dev->mode_config.connector_list,
9179                             base.head) {
9180                 if (connector->get_hw_state(connector)) {
9181                         connector->base.dpms = DRM_MODE_DPMS_ON;
9182                         connector->encoder->connectors_active = true;
9183                         connector->base.encoder = &connector->encoder->base;
9184                 } else {
9185                         connector->base.dpms = DRM_MODE_DPMS_OFF;
9186                         connector->base.encoder = NULL;
9187                 }
9188                 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] hw state readout: %s\n",
9189                               connector->base.base.id,
9190                               drm_get_connector_name(&connector->base),
9191                               connector->base.encoder ? "enabled" : "disabled");
9192         }
9193
9194         /* HW state is read out, now we need to sanitize this mess. */
9195         list_for_each_entry(encoder, &dev->mode_config.encoder_list,
9196                             base.head) {
9197                 intel_sanitize_encoder(encoder);
9198         }
9199
9200         for_each_pipe(pipe) {
9201                 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
9202                 intel_sanitize_crtc(crtc);
9203         }
9204
9205         if (force_restore) {
9206                 for_each_pipe(pipe) {
9207                         intel_crtc_restore_mode(dev_priv->pipe_to_crtc_mapping[pipe]);
9208                 }
9209
9210                 i915_redisable_vga(dev);
9211         } else {
9212                 intel_modeset_update_staged_output_state(dev);
9213         }
9214
9215         intel_modeset_check_state(dev);
9216
9217         drm_mode_config_reset(dev);
9218 }
9219
9220 void intel_modeset_gem_init(struct drm_device *dev)
9221 {
9222         intel_modeset_init_hw(dev);
9223
9224         intel_setup_overlay(dev);
9225
9226         intel_modeset_setup_hw_state(dev, false);
9227 }
9228
9229 void intel_modeset_cleanup(struct drm_device *dev)
9230 {
9231         struct drm_i915_private *dev_priv = dev->dev_private;
9232         struct drm_crtc *crtc;
9233         struct intel_crtc *intel_crtc;
9234
9235         drm_kms_helper_poll_fini(dev);
9236         mutex_lock(&dev->struct_mutex);
9237
9238         intel_unregister_dsm_handler();
9239
9240
9241         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
9242                 /* Skip inactive CRTCs */
9243                 if (!crtc->fb)
9244                         continue;
9245
9246                 intel_crtc = to_intel_crtc(crtc);
9247                 intel_increase_pllclock(crtc);
9248         }
9249
9250         intel_disable_fbc(dev);
9251
9252         intel_disable_gt_powersave(dev);
9253
9254         ironlake_teardown_rc6(dev);
9255
9256         if (IS_VALLEYVIEW(dev))
9257                 vlv_init_dpio(dev);
9258
9259         mutex_unlock(&dev->struct_mutex);
9260
9261         /* Disable the irq before mode object teardown, for the irq might
9262          * enqueue unpin/hotplug work. */
9263         drm_irq_uninstall(dev);
9264         cancel_work_sync(&dev_priv->hotplug_work);
9265         cancel_work_sync(&dev_priv->rps.work);
9266
9267         /* flush any delayed tasks or pending work */
9268         flush_scheduled_work();
9269
9270         drm_mode_config_cleanup(dev);
9271
9272         intel_cleanup_overlay(dev);
9273 }
9274
9275 /*
9276  * Return which encoder is currently attached for connector.
9277  */
9278 struct drm_encoder *intel_best_encoder(struct drm_connector *connector)
9279 {
9280         return &intel_attached_encoder(connector)->base;
9281 }
9282
9283 void intel_connector_attach_encoder(struct intel_connector *connector,
9284                                     struct intel_encoder *encoder)
9285 {
9286         connector->encoder = encoder;
9287         drm_mode_connector_attach_encoder(&connector->base,
9288                                           &encoder->base);
9289 }
9290
9291 /*
9292  * set vga decode state - true == enable VGA decode
9293  */
9294 int intel_modeset_vga_set_state(struct drm_device *dev, bool state)
9295 {
9296         struct drm_i915_private *dev_priv = dev->dev_private;
9297         u16 gmch_ctrl;
9298
9299         pci_read_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, &gmch_ctrl);
9300         if (state)
9301                 gmch_ctrl &= ~INTEL_GMCH_VGA_DISABLE;
9302         else
9303                 gmch_ctrl |= INTEL_GMCH_VGA_DISABLE;
9304         pci_write_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, gmch_ctrl);
9305         return 0;
9306 }
9307
9308 #ifdef CONFIG_DEBUG_FS
9309 #include <linux/seq_file.h>
9310
9311 struct intel_display_error_state {
9312         struct intel_cursor_error_state {
9313                 u32 control;
9314                 u32 position;
9315                 u32 base;
9316                 u32 size;
9317         } cursor[I915_MAX_PIPES];
9318
9319         struct intel_pipe_error_state {
9320                 u32 conf;
9321                 u32 source;
9322
9323                 u32 htotal;
9324                 u32 hblank;
9325                 u32 hsync;
9326                 u32 vtotal;
9327                 u32 vblank;
9328                 u32 vsync;
9329         } pipe[I915_MAX_PIPES];
9330
9331         struct intel_plane_error_state {
9332                 u32 control;
9333                 u32 stride;
9334                 u32 size;
9335                 u32 pos;
9336                 u32 addr;
9337                 u32 surface;
9338                 u32 tile_offset;
9339         } plane[I915_MAX_PIPES];
9340 };
9341
9342 struct intel_display_error_state *
9343 intel_display_capture_error_state(struct drm_device *dev)
9344 {
9345         drm_i915_private_t *dev_priv = dev->dev_private;
9346         struct intel_display_error_state *error;
9347         enum transcoder cpu_transcoder;
9348         int i;
9349
9350         error = kmalloc(sizeof(*error), GFP_ATOMIC);
9351         if (error == NULL)
9352                 return NULL;
9353
9354         for_each_pipe(i) {
9355                 cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv, i);
9356
9357                 if (INTEL_INFO(dev)->gen <= 6 || IS_VALLEYVIEW(dev)) {
9358                         error->cursor[i].control = I915_READ(CURCNTR(i));
9359                         error->cursor[i].position = I915_READ(CURPOS(i));
9360                         error->cursor[i].base = I915_READ(CURBASE(i));
9361                 } else {
9362                         error->cursor[i].control = I915_READ(CURCNTR_IVB(i));
9363                         error->cursor[i].position = I915_READ(CURPOS_IVB(i));
9364                         error->cursor[i].base = I915_READ(CURBASE_IVB(i));
9365                 }
9366
9367                 error->plane[i].control = I915_READ(DSPCNTR(i));
9368                 error->plane[i].stride = I915_READ(DSPSTRIDE(i));
9369                 if (INTEL_INFO(dev)->gen <= 3)
9370                         error->plane[i].size = I915_READ(DSPSIZE(i));
9371                 error->plane[i].pos = I915_READ(DSPPOS(i));
9372                 if (INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev))
9373                         error->plane[i].addr = I915_READ(DSPADDR(i));
9374                 if (INTEL_INFO(dev)->gen >= 4) {
9375                         error->plane[i].surface = I915_READ(DSPSURF(i));
9376                         error->plane[i].tile_offset = I915_READ(DSPTILEOFF(i));
9377                 }
9378
9379                 error->pipe[i].conf = I915_READ(PIPECONF(cpu_transcoder));
9380                 error->pipe[i].source = I915_READ(PIPESRC(i));
9381                 error->pipe[i].htotal = I915_READ(HTOTAL(cpu_transcoder));
9382                 error->pipe[i].hblank = I915_READ(HBLANK(cpu_transcoder));
9383                 error->pipe[i].hsync = I915_READ(HSYNC(cpu_transcoder));
9384                 error->pipe[i].vtotal = I915_READ(VTOTAL(cpu_transcoder));
9385                 error->pipe[i].vblank = I915_READ(VBLANK(cpu_transcoder));
9386                 error->pipe[i].vsync = I915_READ(VSYNC(cpu_transcoder));
9387         }
9388
9389         return error;
9390 }
9391
9392 void
9393 intel_display_print_error_state(struct seq_file *m,
9394                                 struct drm_device *dev,
9395                                 struct intel_display_error_state *error)
9396 {
9397         drm_i915_private_t *dev_priv = dev->dev_private;
9398         int i;
9399
9400         seq_printf(m, "Num Pipes: %d\n", dev_priv->num_pipe);
9401         for_each_pipe(i) {
9402                 seq_printf(m, "Pipe [%d]:\n", i);
9403                 seq_printf(m, "  CONF: %08x\n", error->pipe[i].conf);
9404                 seq_printf(m, "  SRC: %08x\n", error->pipe[i].source);
9405                 seq_printf(m, "  HTOTAL: %08x\n", error->pipe[i].htotal);
9406                 seq_printf(m, "  HBLANK: %08x\n", error->pipe[i].hblank);
9407                 seq_printf(m, "  HSYNC: %08x\n", error->pipe[i].hsync);
9408                 seq_printf(m, "  VTOTAL: %08x\n", error->pipe[i].vtotal);
9409                 seq_printf(m, "  VBLANK: %08x\n", error->pipe[i].vblank);
9410                 seq_printf(m, "  VSYNC: %08x\n", error->pipe[i].vsync);
9411
9412                 seq_printf(m, "Plane [%d]:\n", i);
9413                 seq_printf(m, "  CNTR: %08x\n", error->plane[i].control);
9414                 seq_printf(m, "  STRIDE: %08x\n", error->plane[i].stride);
9415                 if (INTEL_INFO(dev)->gen <= 3)
9416                         seq_printf(m, "  SIZE: %08x\n", error->plane[i].size);
9417                 seq_printf(m, "  POS: %08x\n", error->plane[i].pos);
9418                 if (!IS_HASWELL(dev))
9419                         seq_printf(m, "  ADDR: %08x\n", error->plane[i].addr);
9420                 if (INTEL_INFO(dev)->gen >= 4) {
9421                         seq_printf(m, "  SURF: %08x\n", error->plane[i].surface);
9422                         seq_printf(m, "  TILEOFF: %08x\n", error->plane[i].tile_offset);
9423                 }
9424
9425                 seq_printf(m, "Cursor [%d]:\n", i);
9426                 seq_printf(m, "  CNTR: %08x\n", error->cursor[i].control);
9427                 seq_printf(m, "  POS: %08x\n", error->cursor[i].position);
9428                 seq_printf(m, "  BASE: %08x\n", error->cursor[i].base);
9429         }
9430 }
9431 #endif