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 "intel_frontbuffer.h"
  38 #include <drm/i915_drm.h>
  39 #include "i915_drv.h"
  40 #include "i915_gem_clflush.h"
  41 #include "intel_dsi.h"
  42 #include "i915_trace.h"
  43 #include <drm/drm_atomic.h>
  44 #include <drm/drm_atomic_helper.h>
  45 #include <drm/drm_dp_helper.h>
  46 #include <drm/drm_crtc_helper.h>
  47 #include <drm/drm_plane_helper.h>
  48 #include <drm/drm_rect.h>
  49 #include <drm/drm_atomic_uapi.h>
  50 #include <linux/dma_remapping.h>
  51 #include <linux/reservation.h>
  52
  53 /* Primary plane formats for gen <= 3 */
  54 static const uint32_t i8xx_primary_formats[] = {
  55         DRM_FORMAT_C8,
  56         DRM_FORMAT_RGB565,
  57         DRM_FORMAT_XRGB1555,
  58         DRM_FORMAT_XRGB8888,
  59 };
  60
  61 /* Primary plane formats for gen >= 4 */
  62 static const uint32_t i965_primary_formats[] = {
  63         DRM_FORMAT_C8,
  64         DRM_FORMAT_RGB565,
  65         DRM_FORMAT_XRGB8888,
  66         DRM_FORMAT_XBGR8888,
  67         DRM_FORMAT_XRGB2101010,
  68         DRM_FORMAT_XBGR2101010,
  69 };
  70
  71 static const uint64_t i9xx_format_modifiers[] = {
  72         I915_FORMAT_MOD_X_TILED,
  73         DRM_FORMAT_MOD_LINEAR,
  74         DRM_FORMAT_MOD_INVALID
  75 };
  76
  77 static const uint32_t skl_primary_formats[] = {
  78         DRM_FORMAT_C8,
  79         DRM_FORMAT_RGB565,
  80         DRM_FORMAT_XRGB8888,
  81         DRM_FORMAT_XBGR8888,
  82         DRM_FORMAT_ARGB8888,
  83         DRM_FORMAT_ABGR8888,
  84         DRM_FORMAT_XRGB2101010,
  85         DRM_FORMAT_XBGR2101010,
  86         DRM_FORMAT_YUYV,
  87         DRM_FORMAT_YVYU,
  88         DRM_FORMAT_UYVY,
  89         DRM_FORMAT_VYUY,
  90 };
  91
  92 static const uint32_t skl_pri_planar_formats[] = {
  93         DRM_FORMAT_C8,
  94         DRM_FORMAT_RGB565,
  95         DRM_FORMAT_XRGB8888,
  96         DRM_FORMAT_XBGR8888,
  97         DRM_FORMAT_ARGB8888,
  98         DRM_FORMAT_ABGR8888,
  99         DRM_FORMAT_XRGB2101010,
 100         DRM_FORMAT_XBGR2101010,
 101         DRM_FORMAT_YUYV,
 102         DRM_FORMAT_YVYU,
 103         DRM_FORMAT_UYVY,
 104         DRM_FORMAT_VYUY,
 105         DRM_FORMAT_NV12,
 106 };
 107
 108 static const uint64_t skl_format_modifiers_noccs[] = {
 109         I915_FORMAT_MOD_Yf_TILED,
 110         I915_FORMAT_MOD_Y_TILED,
 111         I915_FORMAT_MOD_X_TILED,
 112         DRM_FORMAT_MOD_LINEAR,
 113         DRM_FORMAT_MOD_INVALID
 114 };
 115
 116 static const uint64_t skl_format_modifiers_ccs[] = {
 117         I915_FORMAT_MOD_Yf_TILED_CCS,
 118         I915_FORMAT_MOD_Y_TILED_CCS,
 119         I915_FORMAT_MOD_Yf_TILED,
 120         I915_FORMAT_MOD_Y_TILED,
 121         I915_FORMAT_MOD_X_TILED,
 122         DRM_FORMAT_MOD_LINEAR,
 123         DRM_FORMAT_MOD_INVALID
 124 };
 125
 126 /* Cursor formats */
 127 static const uint32_t intel_cursor_formats[] = {
 128         DRM_FORMAT_ARGB8888,
 129 };
 130
 131 static const uint64_t cursor_format_modifiers[] = {
 132         DRM_FORMAT_MOD_LINEAR,
 133         DRM_FORMAT_MOD_INVALID
 134 };
 135
 136 static void i9xx_crtc_clock_get(struct intel_crtc *crtc,
 137                                 struct intel_crtc_state *pipe_config);
 138 static void ironlake_pch_clock_get(struct intel_crtc *crtc,
 139                                    struct intel_crtc_state *pipe_config);
 140
 141 static int intel_framebuffer_init(struct intel_framebuffer *ifb,
 142                                   struct drm_i915_gem_object *obj,
 143                                   struct drm_mode_fb_cmd2 *mode_cmd);
 144 static void i9xx_set_pipeconf(struct intel_crtc *intel_crtc);
 145 static void intel_set_pipe_timings(struct intel_crtc *intel_crtc);
 146 static void intel_set_pipe_src_size(struct intel_crtc *intel_crtc);
 147 static void intel_cpu_transcoder_set_m_n(struct intel_crtc *crtc,
 148                                          struct intel_link_m_n *m_n,
 149                                          struct intel_link_m_n *m2_n2);
 150 static void ironlake_set_pipeconf(struct drm_crtc *crtc);
 151 static void haswell_set_pipeconf(struct drm_crtc *crtc);
 152 static void haswell_set_pipemisc(struct drm_crtc *crtc);
 153 static void vlv_prepare_pll(struct intel_crtc *crtc,
 154                             const struct intel_crtc_state *pipe_config);
 155 static void chv_prepare_pll(struct intel_crtc *crtc,
 156                             const struct intel_crtc_state *pipe_config);
 157 static void intel_begin_crtc_commit(struct drm_crtc *, struct drm_crtc_state *);
 158 static void intel_finish_crtc_commit(struct drm_crtc *, struct drm_crtc_state *);
 159 static void intel_crtc_init_scalers(struct intel_crtc *crtc,
 160                                     struct intel_crtc_state *crtc_state);
 161 static void skylake_pfit_enable(struct intel_crtc *crtc);
 162 static void ironlake_pfit_disable(struct intel_crtc *crtc, bool force);
 163 static void ironlake_pfit_enable(struct intel_crtc *crtc);
 164 static void intel_modeset_setup_hw_state(struct drm_device *dev,
 165                                          struct drm_modeset_acquire_ctx *ctx);
 166 static void intel_pre_disable_primary_noatomic(struct drm_crtc *crtc);
 167
 168 struct intel_limit {
 169         struct {
 170                 int min, max;
 171         } dot, vco, n, m, m1, m2, p, p1;
 172
 173         struct {
 174                 int dot_limit;
 175                 int p2_slow, p2_fast;
 176         } p2;
 177 };
 178
 179 /* returns HPLL frequency in kHz */
 180 int vlv_get_hpll_vco(struct drm_i915_private *dev_priv)
 181 {
 182         int hpll_freq, vco_freq[] = { 800, 1600, 2000, 2400 };
 183
 184         /* Obtain SKU information */
 185         mutex_lock(&dev_priv->sb_lock);
 186         hpll_freq = vlv_cck_read(dev_priv, CCK_FUSE_REG) &
 187                 CCK_FUSE_HPLL_FREQ_MASK;
 188         mutex_unlock(&dev_priv->sb_lock);
 189
 190         return vco_freq[hpll_freq] * 1000;
 191 }
 192
 193 int vlv_get_cck_clock(struct drm_i915_private *dev_priv,
 194                       const char *name, u32 reg, int ref_freq)
 195 {
 196         u32 val;
 197         int divider;
 198
 199         mutex_lock(&dev_priv->sb_lock);
 200         val = vlv_cck_read(dev_priv, reg);
 201         mutex_unlock(&dev_priv->sb_lock);
 202
 203         divider = val & CCK_FREQUENCY_VALUES;
 204
 205         WARN((val & CCK_FREQUENCY_STATUS) !=
 206              (divider << CCK_FREQUENCY_STATUS_SHIFT),
 207              "%s change in progress\n", name);
 208
 209         return DIV_ROUND_CLOSEST(ref_freq << 1, divider + 1);
 210 }
 211
 212 int vlv_get_cck_clock_hpll(struct drm_i915_private *dev_priv,
 213                            const char *name, u32 reg)
 214 {
 215         if (dev_priv->hpll_freq == 0)
 216                 dev_priv->hpll_freq = vlv_get_hpll_vco(dev_priv);
 217
 218         return vlv_get_cck_clock(dev_priv, name, reg,
 219                                  dev_priv->hpll_freq);
 220 }
 221
 222 static void intel_update_czclk(struct drm_i915_private *dev_priv)
 223 {
 224         if (!(IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)))
 225                 return;
 226
 227         dev_priv->czclk_freq = vlv_get_cck_clock_hpll(dev_priv, "czclk",
 228                                                       CCK_CZ_CLOCK_CONTROL);
 229
 230         DRM_DEBUG_DRIVER("CZ clock rate: %d kHz\n", dev_priv->czclk_freq);
 231 }
 232
 233 static inline u32 /* units of 100MHz */
 234 intel_fdi_link_freq(struct drm_i915_private *dev_priv,
 235                     const struct intel_crtc_state *pipe_config)
 236 {
 237         if (HAS_DDI(dev_priv))
 238                 return pipe_config->port_clock; /* SPLL */
 239         else
 240                 return dev_priv->fdi_pll_freq;
 241 }
 242
 243 static const struct intel_limit intel_limits_i8xx_dac = {
 244         .dot = { .min = 25000, .max = 350000 },
 245         .vco = { .min = 908000, .max = 1512000 },
 246         .n = { .min = 2, .max = 16 },
 247         .m = { .min = 96, .max = 140 },
 248         .m1 = { .min = 18, .max = 26 },
 249         .m2 = { .min = 6, .max = 16 },
 250         .p = { .min = 4, .max = 128 },
 251         .p1 = { .min = 2, .max = 33 },
 252         .p2 = { .dot_limit = 165000,
 253                 .p2_slow = 4, .p2_fast = 2 },
 254 };
 255
 256 static const struct intel_limit intel_limits_i8xx_dvo = {
 257         .dot = { .min = 25000, .max = 350000 },
 258         .vco = { .min = 908000, .max = 1512000 },
 259         .n = { .min = 2, .max = 16 },
 260         .m = { .min = 96, .max = 140 },
 261         .m1 = { .min = 18, .max = 26 },
 262         .m2 = { .min = 6, .max = 16 },
 263         .p = { .min = 4, .max = 128 },
 264         .p1 = { .min = 2, .max = 33 },
 265         .p2 = { .dot_limit = 165000,
 266                 .p2_slow = 4, .p2_fast = 4 },
 267 };
 268
 269 static const struct intel_limit intel_limits_i8xx_lvds = {
 270         .dot = { .min = 25000, .max = 350000 },
 271         .vco = { .min = 908000, .max = 1512000 },
 272         .n = { .min = 2, .max = 16 },
 273         .m = { .min = 96, .max = 140 },
 274         .m1 = { .min = 18, .max = 26 },
 275         .m2 = { .min = 6, .max = 16 },
 276         .p = { .min = 4, .max = 128 },
 277         .p1 = { .min = 1, .max = 6 },
 278         .p2 = { .dot_limit = 165000,
 279                 .p2_slow = 14, .p2_fast = 7 },
 280 };
 281
 282 static const struct intel_limit intel_limits_i9xx_sdvo = {
 283         .dot = { .min = 20000, .max = 400000 },
 284         .vco = { .min = 1400000, .max = 2800000 },
 285         .n = { .min = 1, .max = 6 },
 286         .m = { .min = 70, .max = 120 },
 287         .m1 = { .min = 8, .max = 18 },
 288         .m2 = { .min = 3, .max = 7 },
 289         .p = { .min = 5, .max = 80 },
 290         .p1 = { .min = 1, .max = 8 },
 291         .p2 = { .dot_limit = 200000,
 292                 .p2_slow = 10, .p2_fast = 5 },
 293 };
 294
 295 static const struct intel_limit intel_limits_i9xx_lvds = {
 296         .dot = { .min = 20000, .max = 400000 },
 297         .vco = { .min = 1400000, .max = 2800000 },
 298         .n = { .min = 1, .max = 6 },
 299         .m = { .min = 70, .max = 120 },
 300         .m1 = { .min = 8, .max = 18 },
 301         .m2 = { .min = 3, .max = 7 },
 302         .p = { .min = 7, .max = 98 },
 303         .p1 = { .min = 1, .max = 8 },
 304         .p2 = { .dot_limit = 112000,
 305                 .p2_slow = 14, .p2_fast = 7 },
 306 };
 307
 308
 309 static const struct intel_limit intel_limits_g4x_sdvo = {
 310         .dot = { .min = 25000, .max = 270000 },
 311         .vco = { .min = 1750000, .max = 3500000},
 312         .n = { .min = 1, .max = 4 },
 313         .m = { .min = 104, .max = 138 },
 314         .m1 = { .min = 17, .max = 23 },
 315         .m2 = { .min = 5, .max = 11 },
 316         .p = { .min = 10, .max = 30 },
 317         .p1 = { .min = 1, .max = 3},
 318         .p2 = { .dot_limit = 270000,
 319                 .p2_slow = 10,
 320                 .p2_fast = 10
 321         },
 322 };
 323
 324 static const struct intel_limit intel_limits_g4x_hdmi = {
 325         .dot = { .min = 22000, .max = 400000 },
 326         .vco = { .min = 1750000, .max = 3500000},
 327         .n = { .min = 1, .max = 4 },
 328         .m = { .min = 104, .max = 138 },
 329         .m1 = { .min = 16, .max = 23 },
 330         .m2 = { .min = 5, .max = 11 },
 331         .p = { .min = 5, .max = 80 },
 332         .p1 = { .min = 1, .max = 8},
 333         .p2 = { .dot_limit = 165000,
 334                 .p2_slow = 10, .p2_fast = 5 },
 335 };
 336
 337 static const struct intel_limit intel_limits_g4x_single_channel_lvds = {
 338         .dot = { .min = 20000, .max = 115000 },
 339         .vco = { .min = 1750000, .max = 3500000 },
 340         .n = { .min = 1, .max = 3 },
 341         .m = { .min = 104, .max = 138 },
 342         .m1 = { .min = 17, .max = 23 },
 343         .m2 = { .min = 5, .max = 11 },
 344         .p = { .min = 28, .max = 112 },
 345         .p1 = { .min = 2, .max = 8 },
 346         .p2 = { .dot_limit = 0,
 347                 .p2_slow = 14, .p2_fast = 14
 348         },
 349 };
 350
 351 static const struct intel_limit intel_limits_g4x_dual_channel_lvds = {
 352         .dot = { .min = 80000, .max = 224000 },
 353         .vco = { .min = 1750000, .max = 3500000 },
 354         .n = { .min = 1, .max = 3 },
 355         .m = { .min = 104, .max = 138 },
 356         .m1 = { .min = 17, .max = 23 },
 357         .m2 = { .min = 5, .max = 11 },
 358         .p = { .min = 14, .max = 42 },
 359         .p1 = { .min = 2, .max = 6 },
 360         .p2 = { .dot_limit = 0,
 361                 .p2_slow = 7, .p2_fast = 7
 362         },
 363 };
 364
 365 static const struct intel_limit intel_limits_pineview_sdvo = {
 366         .dot = { .min = 20000, .max = 400000},
 367         .vco = { .min = 1700000, .max = 3500000 },
 368         /* Pineview's Ncounter is a ring counter */
 369         .n = { .min = 3, .max = 6 },
 370         .m = { .min = 2, .max = 256 },
 371         /* Pineview only has one combined m divider, which we treat as m2. */
 372         .m1 = { .min = 0, .max = 0 },
 373         .m2 = { .min = 0, .max = 254 },
 374         .p = { .min = 5, .max = 80 },
 375         .p1 = { .min = 1, .max = 8 },
 376         .p2 = { .dot_limit = 200000,
 377                 .p2_slow = 10, .p2_fast = 5 },
 378 };
 379
 380 static const struct intel_limit intel_limits_pineview_lvds = {
 381         .dot = { .min = 20000, .max = 400000 },
 382         .vco = { .min = 1700000, .max = 3500000 },
 383         .n = { .min = 3, .max = 6 },
 384         .m = { .min = 2, .max = 256 },
 385         .m1 = { .min = 0, .max = 0 },
 386         .m2 = { .min = 0, .max = 254 },
 387         .p = { .min = 7, .max = 112 },
 388         .p1 = { .min = 1, .max = 8 },
 389         .p2 = { .dot_limit = 112000,
 390                 .p2_slow = 14, .p2_fast = 14 },
 391 };
 392
 393 /* Ironlake / Sandybridge
 394  *
 395  * We calculate clock using (register_value + 2) for N/M1/M2, so here
 396  * the range value for them is (actual_value - 2).
 397  */
 398 static const struct intel_limit intel_limits_ironlake_dac = {
 399         .dot = { .min = 25000, .max = 350000 },
 400         .vco = { .min = 1760000, .max = 3510000 },
 401         .n = { .min = 1, .max = 5 },
 402         .m = { .min = 79, .max = 127 },
 403         .m1 = { .min = 12, .max = 22 },
 404         .m2 = { .min = 5, .max = 9 },
 405         .p = { .min = 5, .max = 80 },
 406         .p1 = { .min = 1, .max = 8 },
 407         .p2 = { .dot_limit = 225000,
 408                 .p2_slow = 10, .p2_fast = 5 },
 409 };
 410
 411 static const struct intel_limit intel_limits_ironlake_single_lvds = {
 412         .dot = { .min = 25000, .max = 350000 },
 413         .vco = { .min = 1760000, .max = 3510000 },
 414         .n = { .min = 1, .max = 3 },
 415         .m = { .min = 79, .max = 118 },
 416         .m1 = { .min = 12, .max = 22 },
 417         .m2 = { .min = 5, .max = 9 },
 418         .p = { .min = 28, .max = 112 },
 419         .p1 = { .min = 2, .max = 8 },
 420         .p2 = { .dot_limit = 225000,
 421                 .p2_slow = 14, .p2_fast = 14 },
 422 };
 423
 424 static const struct intel_limit intel_limits_ironlake_dual_lvds = {
 425         .dot = { .min = 25000, .max = 350000 },
 426         .vco = { .min = 1760000, .max = 3510000 },
 427         .n = { .min = 1, .max = 3 },
 428         .m = { .min = 79, .max = 127 },
 429         .m1 = { .min = 12, .max = 22 },
 430         .m2 = { .min = 5, .max = 9 },
 431         .p = { .min = 14, .max = 56 },
 432         .p1 = { .min = 2, .max = 8 },
 433         .p2 = { .dot_limit = 225000,
 434                 .p2_slow = 7, .p2_fast = 7 },
 435 };
 436
 437 /* LVDS 100mhz refclk limits. */
 438 static const struct intel_limit intel_limits_ironlake_single_lvds_100m = {
 439         .dot = { .min = 25000, .max = 350000 },
 440         .vco = { .min = 1760000, .max = 3510000 },
 441         .n = { .min = 1, .max = 2 },
 442         .m = { .min = 79, .max = 126 },
 443         .m1 = { .min = 12, .max = 22 },
 444         .m2 = { .min = 5, .max = 9 },
 445         .p = { .min = 28, .max = 112 },
 446         .p1 = { .min = 2, .max = 8 },
 447         .p2 = { .dot_limit = 225000,
 448                 .p2_slow = 14, .p2_fast = 14 },
 449 };
 450
 451 static const struct intel_limit intel_limits_ironlake_dual_lvds_100m = {
 452         .dot = { .min = 25000, .max = 350000 },
 453         .vco = { .min = 1760000, .max = 3510000 },
 454         .n = { .min = 1, .max = 3 },
 455         .m = { .min = 79, .max = 126 },
 456         .m1 = { .min = 12, .max = 22 },
 457         .m2 = { .min = 5, .max = 9 },
 458         .p = { .min = 14, .max = 42 },
 459         .p1 = { .min = 2, .max = 6 },
 460         .p2 = { .dot_limit = 225000,
 461                 .p2_slow = 7, .p2_fast = 7 },
 462 };
 463
 464 static const struct intel_limit intel_limits_vlv = {
 465          /*
 466           * These are the data rate limits (measured in fast clocks)
 467           * since those are the strictest limits we have. The fast
 468           * clock and actual rate limits are more relaxed, so checking
 469           * them would make no difference.
 470           */
 471         .dot = { .min = 25000 * 5, .max = 270000 * 5 },
 472         .vco = { .min = 4000000, .max = 6000000 },
 473         .n = { .min = 1, .max = 7 },
 474         .m1 = { .min = 2, .max = 3 },
 475         .m2 = { .min = 11, .max = 156 },
 476         .p1 = { .min = 2, .max = 3 },
 477         .p2 = { .p2_slow = 2, .p2_fast = 20 }, /* slow=min, fast=max */
 478 };
 479
 480 static const struct intel_limit intel_limits_chv = {
 481         /*
 482          * These are the data rate limits (measured in fast clocks)
 483          * since those are the strictest limits we have.  The fast
 484          * clock and actual rate limits are more relaxed, so checking
 485          * them would make no difference.
 486          */
 487         .dot = { .min = 25000 * 5, .max = 540000 * 5},
 488         .vco = { .min = 4800000, .max = 6480000 },
 489         .n = { .min = 1, .max = 1 },
 490         .m1 = { .min = 2, .max = 2 },
 491         .m2 = { .min = 24 << 22, .max = 175 << 22 },
 492         .p1 = { .min = 2, .max = 4 },
 493         .p2 = { .p2_slow = 1, .p2_fast = 14 },
 494 };
 495
 496 static const struct intel_limit intel_limits_bxt = {
 497         /* FIXME: find real dot limits */
 498         .dot = { .min = 0, .max = INT_MAX },
 499         .vco = { .min = 4800000, .max = 6700000 },
 500         .n = { .min = 1, .max = 1 },
 501         .m1 = { .min = 2, .max = 2 },
 502         /* FIXME: find real m2 limits */
 503         .m2 = { .min = 2 << 22, .max = 255 << 22 },
 504         .p1 = { .min = 2, .max = 4 },
 505         .p2 = { .p2_slow = 1, .p2_fast = 20 },
 506 };
 507
 508 static void
 509 skl_wa_528(struct drm_i915_private *dev_priv, int pipe, bool enable)
 510 {
 511         if (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))
 512                 return;
 513
 514         if (enable)
 515                 I915_WRITE(CHICKEN_PIPESL_1(pipe), HSW_FBCQ_DIS);
 516         else
 517                 I915_WRITE(CHICKEN_PIPESL_1(pipe), 0);
 518 }
 519
 520 static void
 521 skl_wa_clkgate(struct drm_i915_private *dev_priv, int pipe, bool enable)
 522 {
 523         if (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))
 524                 return;
 525
 526         if (enable)
 527                 I915_WRITE(CLKGATE_DIS_PSL(pipe),
 528                            DUPS1_GATING_DIS | DUPS2_GATING_DIS);
 529         else
 530                 I915_WRITE(CLKGATE_DIS_PSL(pipe),
 531                            I915_READ(CLKGATE_DIS_PSL(pipe)) &
 532                            ~(DUPS1_GATING_DIS | DUPS2_GATING_DIS));
 533 }
 534
 535 static bool
 536 needs_modeset(const struct drm_crtc_state *state)
 537 {
 538         return drm_atomic_crtc_needs_modeset(state);
 539 }
 540
 541 /*
 542  * Platform specific helpers to calculate the port PLL loopback- (clock.m),
 543  * and post-divider (clock.p) values, pre- (clock.vco) and post-divided fast
 544  * (clock.dot) clock rates. This fast dot clock is fed to the port's IO logic.
 545  * The helpers' return value is the rate of the clock that is fed to the
 546  * display engine's pipe which can be the above fast dot clock rate or a
 547  * divided-down version of it.
 548  */
 549 /* m1 is reserved as 0 in Pineview, n is a ring counter */
 550 static int pnv_calc_dpll_params(int refclk, struct dpll *clock)
 551 {
 552         clock->m = clock->m2 + 2;
 553         clock->p = clock->p1 * clock->p2;
 554         if (WARN_ON(clock->n == 0 || clock->p == 0))
 555                 return 0;
 556         clock->vco = DIV_ROUND_CLOSEST(refclk * clock->m, clock->n);
 557         clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p);
 558
 559         return clock->dot;
 560 }
 561
 562 static uint32_t i9xx_dpll_compute_m(struct dpll *dpll)
 563 {
 564         return 5 * (dpll->m1 + 2) + (dpll->m2 + 2);
 565 }
 566
 567 static int i9xx_calc_dpll_params(int refclk, struct dpll *clock)
 568 {
 569         clock->m = i9xx_dpll_compute_m(clock);
 570         clock->p = clock->p1 * clock->p2;
 571         if (WARN_ON(clock->n + 2 == 0 || clock->p == 0))
 572                 return 0;
 573         clock->vco = DIV_ROUND_CLOSEST(refclk * clock->m, clock->n + 2);
 574         clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p);
 575
 576         return clock->dot;
 577 }
 578
 579 static int vlv_calc_dpll_params(int refclk, struct dpll *clock)
 580 {
 581         clock->m = clock->m1 * clock->m2;
 582         clock->p = clock->p1 * clock->p2;
 583         if (WARN_ON(clock->n == 0 || clock->p == 0))
 584                 return 0;
 585         clock->vco = DIV_ROUND_CLOSEST(refclk * clock->m, clock->n);
 586         clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p);
 587
 588         return clock->dot / 5;
 589 }
 590
 591 int chv_calc_dpll_params(int refclk, struct dpll *clock)
 592 {
 593         clock->m = clock->m1 * clock->m2;
 594         clock->p = clock->p1 * clock->p2;
 595         if (WARN_ON(clock->n == 0 || clock->p == 0))
 596                 return 0;
 597         clock->vco = DIV_ROUND_CLOSEST_ULL((uint64_t)refclk * clock->m,
 598                         clock->n << 22);
 599         clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p);
 600
 601         return clock->dot / 5;
 602 }
 603
 604 #define INTELPllInvalid(s)   do { /* DRM_DEBUG(s); */ return false; } while (0)
 605
 606 /*
 607  * Returns whether the given set of divisors are valid for a given refclk with
 608  * the given connectors.
 609  */
 610 static bool intel_PLL_is_valid(struct drm_i915_private *dev_priv,
 611                                const struct intel_limit *limit,
 612                                const struct dpll *clock)
 613 {
 614         if (clock->n   < limit->n.min   || limit->n.max   < clock->n)
 615                 INTELPllInvalid("n out of range\n");
 616         if (clock->p1  < limit->p1.min  || limit->p1.max  < clock->p1)
 617                 INTELPllInvalid("p1 out of range\n");
 618         if (clock->m2  < limit->m2.min  || limit->m2.max  < clock->m2)
 619                 INTELPllInvalid("m2 out of range\n");
 620         if (clock->m1  < limit->m1.min  || limit->m1.max  < clock->m1)
 621                 INTELPllInvalid("m1 out of range\n");
 622
 623         if (!IS_PINEVIEW(dev_priv) && !IS_VALLEYVIEW(dev_priv) &&
 624             !IS_CHERRYVIEW(dev_priv) && !IS_GEN9_LP(dev_priv))
 625                 if (clock->m1 <= clock->m2)
 626                         INTELPllInvalid("m1 <= m2\n");
 627
 628         if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv) &&
 629             !IS_GEN9_LP(dev_priv)) {
 630                 if (clock->p < limit->p.min || limit->p.max < clock->p)
 631                         INTELPllInvalid("p out of range\n");
 632                 if (clock->m < limit->m.min || limit->m.max < clock->m)
 633                         INTELPllInvalid("m out of range\n");
 634         }
 635
 636         if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
 637                 INTELPllInvalid("vco out of range\n");
 638         /* XXX: We may need to be checking "Dot clock" depending on the multiplier,
 639          * connector, etc., rather than just a single range.
 640          */
 641         if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
 642                 INTELPllInvalid("dot out of range\n");
 643
 644         return true;
 645 }
 646
 647 static int
 648 i9xx_select_p2_div(const struct intel_limit *limit,
 649                    const struct intel_crtc_state *crtc_state,
 650                    int target)
 651 {
 652         struct drm_device *dev = crtc_state->base.crtc->dev;
 653
 654         if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
 655                 /*
 656                  * For LVDS just rely on its current settings for dual-channel.
 657                  * We haven't figured out how to reliably set up different
 658                  * single/dual channel state, if we even can.
 659                  */
 660                 if (intel_is_dual_link_lvds(dev))
 661                         return limit->p2.p2_fast;
 662                 else
 663                         return limit->p2.p2_slow;
 664         } else {
 665                 if (target < limit->p2.dot_limit)
 666                         return limit->p2.p2_slow;
 667                 else
 668                         return limit->p2.p2_fast;
 669         }
 670 }
 671
 672 /*
 673  * Returns a set of divisors for the desired target clock with the given
 674  * refclk, or FALSE.  The returned values represent the clock equation:
 675  * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
 676  *
 677  * Target and reference clocks are specified in kHz.
 678  *
 679  * If match_clock is provided, then best_clock P divider must match the P
 680  * divider from @match_clock used for LVDS downclocking.
 681  */
 682 static bool
 683 i9xx_find_best_dpll(const struct intel_limit *limit,
 684                     struct intel_crtc_state *crtc_state,
 685                     int target, int refclk, struct dpll *match_clock,
 686                     struct dpll *best_clock)
 687 {
 688         struct drm_device *dev = crtc_state->base.crtc->dev;
 689         struct dpll clock;
 690         int err = target;
 691
 692         memset(best_clock, 0, sizeof(*best_clock));
 693
 694         clock.p2 = i9xx_select_p2_div(limit, crtc_state, target);
 695
 696         for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max;
 697              clock.m1++) {
 698                 for (clock.m2 = limit->m2.min;
 699                      clock.m2 <= limit->m2.max; clock.m2++) {
 700                         if (clock.m2 >= clock.m1)
 701                                 break;
 702                         for (clock.n = limit->n.min;
 703                              clock.n <= limit->n.max; clock.n++) {
 704                                 for (clock.p1 = limit->p1.min;
 705                                         clock.p1 <= limit->p1.max; clock.p1++) {
 706                                         int this_err;
 707
 708                                         i9xx_calc_dpll_params(refclk, &clock);
 709                                         if (!intel_PLL_is_valid(to_i915(dev),
 710                                                                 limit,
 711                                                                 &clock))
 712                                                 continue;
 713                                         if (match_clock &&
 714                                             clock.p != match_clock->p)
 715                                                 continue;
 716
 717                                         this_err = abs(clock.dot - target);
 718                                         if (this_err < err) {
 719                                                 *best_clock = clock;
 720                                                 err = this_err;
 721                                         }
 722                                 }
 723                         }
 724                 }
 725         }
 726
 727         return (err != target);
 728 }
 729
 730 /*
 731  * Returns a set of divisors for the desired target clock with the given
 732  * refclk, or FALSE.  The returned values represent the clock equation:
 733  * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
 734  *
 735  * Target and reference clocks are specified in kHz.
 736  *
 737  * If match_clock is provided, then best_clock P divider must match the P
 738  * divider from @match_clock used for LVDS downclocking.
 739  */
 740 static bool
 741 pnv_find_best_dpll(const struct intel_limit *limit,
 742                    struct intel_crtc_state *crtc_state,
 743                    int target, int refclk, struct dpll *match_clock,
 744                    struct dpll *best_clock)
 745 {
 746         struct drm_device *dev = crtc_state->base.crtc->dev;
 747         struct dpll clock;
 748         int err = target;
 749
 750         memset(best_clock, 0, sizeof(*best_clock));
 751
 752         clock.p2 = i9xx_select_p2_div(limit, crtc_state, target);
 753
 754         for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max;
 755              clock.m1++) {
 756                 for (clock.m2 = limit->m2.min;
 757                      clock.m2 <= limit->m2.max; clock.m2++) {
 758                         for (clock.n = limit->n.min;
 759                              clock.n <= limit->n.max; clock.n++) {
 760                                 for (clock.p1 = limit->p1.min;
 761                                         clock.p1 <= limit->p1.max; clock.p1++) {
 762                                         int this_err;
 763
 764                                         pnv_calc_dpll_params(refclk, &clock);
 765                                         if (!intel_PLL_is_valid(to_i915(dev),
 766                                                                 limit,
 767                                                                 &clock))
 768                                                 continue;
 769                                         if (match_clock &&
 770                                             clock.p != match_clock->p)
 771                                                 continue;
 772
 773                                         this_err = abs(clock.dot - target);
 774                                         if (this_err < err) {
 775                                                 *best_clock = clock;
 776                                                 err = this_err;
 777                                         }
 778                                 }
 779                         }
 780                 }
 781         }
 782
 783         return (err != target);
 784 }
 785
 786 /*
 787  * Returns a set of divisors for the desired target clock with the given
 788  * refclk, or FALSE.  The returned values represent the clock equation:
 789  * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
 790  *
 791  * Target and reference clocks are specified in kHz.
 792  *
 793  * If match_clock is provided, then best_clock P divider must match the P
 794  * divider from @match_clock used for LVDS downclocking.
 795  */
 796 static bool
 797 g4x_find_best_dpll(const struct intel_limit *limit,
 798                    struct intel_crtc_state *crtc_state,
 799                    int target, int refclk, struct dpll *match_clock,
 800                    struct dpll *best_clock)
 801 {
 802         struct drm_device *dev = crtc_state->base.crtc->dev;
 803         struct dpll clock;
 804         int max_n;
 805         bool found = false;
 806         /* approximately equals target * 0.00585 */
 807         int err_most = (target >> 8) + (target >> 9);
 808
 809         memset(best_clock, 0, sizeof(*best_clock));
 810
 811         clock.p2 = i9xx_select_p2_div(limit, crtc_state, target);
 812
 813         max_n = limit->n.max;
 814         /* based on hardware requirement, prefer smaller n to precision */
 815         for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
 816                 /* based on hardware requirement, prefere larger m1,m2 */
 817                 for (clock.m1 = limit->m1.max;
 818                      clock.m1 >= limit->m1.min; clock.m1--) {
 819                         for (clock.m2 = limit->m2.max;
 820                              clock.m2 >= limit->m2.min; clock.m2--) {
 821                                 for (clock.p1 = limit->p1.max;
 822                                      clock.p1 >= limit->p1.min; clock.p1--) {
 823                                         int this_err;
 824
 825                                         i9xx_calc_dpll_params(refclk, &clock);
 826                                         if (!intel_PLL_is_valid(to_i915(dev),
 827                                                                 limit,
 828                                                                 &clock))
 829                                                 continue;
 830
 831                                         this_err = abs(clock.dot - target);
 832                                         if (this_err < err_most) {
 833                                                 *best_clock = clock;
 834                                                 err_most = this_err;
 835                                                 max_n = clock.n;
 836                                                 found = true;
 837                                         }
 838                                 }
 839                         }
 840                 }
 841         }
 842         return found;
 843 }
 844
 845 /*
 846  * Check if the calculated PLL configuration is more optimal compared to the
 847  * best configuration and error found so far. Return the calculated error.
 848  */
 849 static bool vlv_PLL_is_optimal(struct drm_device *dev, int target_freq,
 850                                const struct dpll *calculated_clock,
 851                                const struct dpll *best_clock,
 852                                unsigned int best_error_ppm,
 853                                unsigned int *error_ppm)
 854 {
 855         /*
 856          * For CHV ignore the error and consider only the P value.
 857          * Prefer a bigger P value based on HW requirements.
 858          */
 859         if (IS_CHERRYVIEW(to_i915(dev))) {
 860                 *error_ppm = 0;
 861
 862                 return calculated_clock->p > best_clock->p;
 863         }
 864
 865         if (WARN_ON_ONCE(!target_freq))
 866                 return false;
 867
 868         *error_ppm = div_u64(1000000ULL *
 869                                 abs(target_freq - calculated_clock->dot),
 870                              target_freq);
 871         /*
 872          * Prefer a better P value over a better (smaller) error if the error
 873          * is small. Ensure this preference for future configurations too by
 874          * setting the error to 0.
 875          */
 876         if (*error_ppm < 100 && calculated_clock->p > best_clock->p) {
 877                 *error_ppm = 0;
 878
 879                 return true;
 880         }
 881
 882         return *error_ppm + 10 < best_error_ppm;
 883 }
 884
 885 /*
 886  * Returns a set of divisors for the desired target clock with the given
 887  * refclk, or FALSE.  The returned values represent the clock equation:
 888  * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
 889  */
 890 static bool
 891 vlv_find_best_dpll(const struct intel_limit *limit,
 892                    struct intel_crtc_state *crtc_state,
 893                    int target, int refclk, struct dpll *match_clock,
 894                    struct dpll *best_clock)
 895 {
 896         struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
 897         struct drm_device *dev = crtc->base.dev;
 898         struct dpll clock;
 899         unsigned int bestppm = 1000000;
 900         /* min update 19.2 MHz */
 901         int max_n = min(limit->n.max, refclk / 19200);
 902         bool found = false;
 903
 904         target *= 5; /* fast clock */
 905
 906         memset(best_clock, 0, sizeof(*best_clock));
 907
 908         /* based on hardware requirement, prefer smaller n to precision */
 909         for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
 910                 for (clock.p1 = limit->p1.max; clock.p1 >= limit->p1.min; clock.p1--) {
 911                         for (clock.p2 = limit->p2.p2_fast; clock.p2 >= limit->p2.p2_slow;
 912                              clock.p2 -= clock.p2 > 10 ? 2 : 1) {
 913                                 clock.p = clock.p1 * clock.p2;
 914                                 /* based on hardware requirement, prefer bigger m1,m2 values */
 915                                 for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max; clock.m1++) {
 916                                         unsigned int ppm;
 917
 918                                         clock.m2 = DIV_ROUND_CLOSEST(target * clock.p * clock.n,
 919                                                                      refclk * clock.m1);
 920
 921                                         vlv_calc_dpll_params(refclk, &clock);
 922
 923                                         if (!intel_PLL_is_valid(to_i915(dev),
 924                                                                 limit,
 925                                                                 &clock))
 926                                                 continue;
 927
 928                                         if (!vlv_PLL_is_optimal(dev, target,
 929                                                                 &clock,
 930                                                                 best_clock,
 931                                                                 bestppm, &ppm))
 932                                                 continue;
 933
 934                                         *best_clock = clock;
 935                                         bestppm = ppm;
 936                                         found = true;
 937                                 }
 938                         }
 939                 }
 940         }
 941
 942         return found;
 943 }
 944
 945 /*
 946  * Returns a set of divisors for the desired target clock with the given
 947  * refclk, or FALSE.  The returned values represent the clock equation:
 948  * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
 949  */
 950 static bool
 951 chv_find_best_dpll(const struct intel_limit *limit,
 952                    struct intel_crtc_state *crtc_state,
 953                    int target, int refclk, struct dpll *match_clock,
 954                    struct dpll *best_clock)
 955 {
 956         struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
 957         struct drm_device *dev = crtc->base.dev;
 958         unsigned int best_error_ppm;
 959         struct dpll clock;
 960         uint64_t m2;
 961         int found = false;
 962
 963         memset(best_clock, 0, sizeof(*best_clock));
 964         best_error_ppm = 1000000;
 965
 966         /*
 967          * Based on hardware doc, the n always set to 1, and m1 always
 968          * set to 2.  If requires to support 200Mhz refclk, we need to
 969          * revisit this because n may not 1 anymore.
 970          */
 971         clock.n = 1, clock.m1 = 2;
 972         target *= 5;    /* fast clock */
 973
 974         for (clock.p1 = limit->p1.max; clock.p1 >= limit->p1.min; clock.p1--) {
 975                 for (clock.p2 = limit->p2.p2_fast;
 976                                 clock.p2 >= limit->p2.p2_slow;
 977                                 clock.p2 -= clock.p2 > 10 ? 2 : 1) {
 978                         unsigned int error_ppm;
 979
 980                         clock.p = clock.p1 * clock.p2;
 981
 982                         m2 = DIV_ROUND_CLOSEST_ULL(((uint64_t)target * clock.p *
 983                                         clock.n) << 22, refclk * clock.m1);
 984
 985                         if (m2 > INT_MAX/clock.m1)
 986                                 continue;
 987
 988                         clock.m2 = m2;
 989
 990                         chv_calc_dpll_params(refclk, &clock);
 991
 992                         if (!intel_PLL_is_valid(to_i915(dev), limit, &clock))
 993                                 continue;
 994
 995                         if (!vlv_PLL_is_optimal(dev, target, &clock, best_clock,
 996                                                 best_error_ppm, &error_ppm))
 997                                 continue;
 998
 999                         *best_clock = clock;
1000                         best_error_ppm = error_ppm;
1001                         found = true;
1002                 }
1003         }
1004
1005         return found;
1006 }
1007
1008 bool bxt_find_best_dpll(struct intel_crtc_state *crtc_state, int target_clock,
1009                         struct dpll *best_clock)
1010 {
1011         int refclk = 100000;
1012         const struct intel_limit *limit = &intel_limits_bxt;
1013
1014         return chv_find_best_dpll(limit, crtc_state,
1015                                   target_clock, refclk, NULL, best_clock);
1016 }
1017
1018 bool intel_crtc_active(struct intel_crtc *crtc)
1019 {
1020         /* Be paranoid as we can arrive here with only partial
1021          * state retrieved from the hardware during setup.
1022          *
1023          * We can ditch the adjusted_mode.crtc_clock check as soon
1024          * as Haswell has gained clock readout/fastboot support.
1025          *
1026          * We can ditch the crtc->primary->state->fb check as soon as we can
1027          * properly reconstruct framebuffers.
1028          *
1029          * FIXME: The intel_crtc->active here should be switched to
1030          * crtc->state->active once we have proper CRTC states wired up
1031          * for atomic.
1032          */
1033         return crtc->active && crtc->base.primary->state->fb &&
1034                 crtc->config->base.adjusted_mode.crtc_clock;
1035 }
1036
1037 enum transcoder intel_pipe_to_cpu_transcoder(struct drm_i915_private *dev_priv,
1038                                              enum pipe pipe)
1039 {
1040         struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
1041
1042         return crtc->config->cpu_transcoder;
1043 }
1044
1045 static bool pipe_scanline_is_moving(struct drm_i915_private *dev_priv,
1046                                     enum pipe pipe)
1047 {
1048         i915_reg_t reg = PIPEDSL(pipe);
1049         u32 line1, line2;
1050         u32 line_mask;
1051
1052         if (IS_GEN2(dev_priv))
1053                 line_mask = DSL_LINEMASK_GEN2;
1054         else
1055                 line_mask = DSL_LINEMASK_GEN3;
1056
1057         line1 = I915_READ(reg) & line_mask;
1058         msleep(5);
1059         line2 = I915_READ(reg) & line_mask;
1060
1061         return line1 != line2;
1062 }
1063
1064 static void wait_for_pipe_scanline_moving(struct intel_crtc *crtc, bool state)
1065 {
1066         struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1067         enum pipe pipe = crtc->pipe;
1068
1069         /* Wait for the display line to settle/start moving */
1070         if (wait_for(pipe_scanline_is_moving(dev_priv, pipe) == state, 100))
1071                 DRM_ERROR("pipe %c scanline %s wait timed out\n",
1072                           pipe_name(pipe), onoff(state));
1073 }
1074
1075 static void intel_wait_for_pipe_scanline_stopped(struct intel_crtc *crtc)
1076 {
1077         wait_for_pipe_scanline_moving(crtc, false);
1078 }
1079
1080 static void intel_wait_for_pipe_scanline_moving(struct intel_crtc *crtc)
1081 {
1082         wait_for_pipe_scanline_moving(crtc, true);
1083 }
1084
1085 static void
1086 intel_wait_for_pipe_off(const struct intel_crtc_state *old_crtc_state)
1087 {
1088         struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
1089         struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1090
1091         if (INTEL_GEN(dev_priv) >= 4) {
1092                 enum transcoder cpu_transcoder = old_crtc_state->cpu_transcoder;
1093                 i915_reg_t reg = PIPECONF(cpu_transcoder);
1094
1095                 /* Wait for the Pipe State to go off */
1096                 if (intel_wait_for_register(dev_priv,
1097                                             reg, I965_PIPECONF_ACTIVE, 0,
1098                                             100))
1099                         WARN(1, "pipe_off wait timed out\n");
1100         } else {
1101                 intel_wait_for_pipe_scanline_stopped(crtc);
1102         }
1103 }
1104
1105 /* Only for pre-ILK configs */
1106 void assert_pll(struct drm_i915_private *dev_priv,
1107                 enum pipe pipe, bool state)
1108 {
1109         u32 val;
1110         bool cur_state;
1111
1112         val = I915_READ(DPLL(pipe));
1113         cur_state = !!(val & DPLL_VCO_ENABLE);
1114         I915_STATE_WARN(cur_state != state,
1115              "PLL state assertion failure (expected %s, current %s)\n",
1116                         onoff(state), onoff(cur_state));
1117 }
1118
1119 /* XXX: the dsi pll is shared between MIPI DSI ports */
1120 void assert_dsi_pll(struct drm_i915_private *dev_priv, bool state)
1121 {
1122         u32 val;
1123         bool cur_state;
1124
1125         mutex_lock(&dev_priv->sb_lock);
1126         val = vlv_cck_read(dev_priv, CCK_REG_DSI_PLL_CONTROL);
1127         mutex_unlock(&dev_priv->sb_lock);
1128
1129         cur_state = val & DSI_PLL_VCO_EN;
1130         I915_STATE_WARN(cur_state != state,
1131              "DSI PLL state assertion failure (expected %s, current %s)\n",
1132                         onoff(state), onoff(cur_state));
1133 }
1134
1135 static void assert_fdi_tx(struct drm_i915_private *dev_priv,
1136                           enum pipe pipe, bool state)
1137 {
1138         bool cur_state;
1139         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
1140                                                                       pipe);
1141
1142         if (HAS_DDI(dev_priv)) {
1143                 /* DDI does not have a specific FDI_TX register */
1144                 u32 val = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
1145                 cur_state = !!(val & TRANS_DDI_FUNC_ENABLE);
1146         } else {
1147                 u32 val = I915_READ(FDI_TX_CTL(pipe));
1148                 cur_state = !!(val & FDI_TX_ENABLE);
1149         }
1150         I915_STATE_WARN(cur_state != state,
1151              "FDI TX state assertion failure (expected %s, current %s)\n",
1152                         onoff(state), onoff(cur_state));
1153 }
1154 #define assert_fdi_tx_enabled(d, p) assert_fdi_tx(d, p, true)
1155 #define assert_fdi_tx_disabled(d, p) assert_fdi_tx(d, p, false)
1156
1157 static void assert_fdi_rx(struct drm_i915_private *dev_priv,
1158                           enum pipe pipe, bool state)
1159 {
1160         u32 val;
1161         bool cur_state;
1162
1163         val = I915_READ(FDI_RX_CTL(pipe));
1164         cur_state = !!(val & FDI_RX_ENABLE);
1165         I915_STATE_WARN(cur_state != state,
1166              "FDI RX state assertion failure (expected %s, current %s)\n",
1167                         onoff(state), onoff(cur_state));
1168 }
1169 #define assert_fdi_rx_enabled(d, p) assert_fdi_rx(d, p, true)
1170 #define assert_fdi_rx_disabled(d, p) assert_fdi_rx(d, p, false)
1171
1172 static void assert_fdi_tx_pll_enabled(struct drm_i915_private *dev_priv,
1173                                       enum pipe pipe)
1174 {
1175         u32 val;
1176
1177         /* ILK FDI PLL is always enabled */
1178         if (IS_GEN5(dev_priv))
1179                 return;
1180
1181         /* On Haswell, DDI ports are responsible for the FDI PLL setup */
1182         if (HAS_DDI(dev_priv))
1183                 return;
1184
1185         val = I915_READ(FDI_TX_CTL(pipe));
1186         I915_STATE_WARN(!(val & FDI_TX_PLL_ENABLE), "FDI TX PLL assertion failure, should be active but is disabled\n");
1187 }
1188
1189 void assert_fdi_rx_pll(struct drm_i915_private *dev_priv,
1190                        enum pipe pipe, bool state)
1191 {
1192         u32 val;
1193         bool cur_state;
1194
1195         val = I915_READ(FDI_RX_CTL(pipe));
1196         cur_state = !!(val & FDI_RX_PLL_ENABLE);
1197         I915_STATE_WARN(cur_state != state,
1198              "FDI RX PLL assertion failure (expected %s, current %s)\n",
1199                         onoff(state), onoff(cur_state));
1200 }
1201
1202 void assert_panel_unlocked(struct drm_i915_private *dev_priv, enum pipe pipe)
1203 {
1204         i915_reg_t pp_reg;
1205         u32 val;
1206         enum pipe panel_pipe = INVALID_PIPE;
1207         bool locked = true;
1208
1209         if (WARN_ON(HAS_DDI(dev_priv)))
1210                 return;
1211
1212         if (HAS_PCH_SPLIT(dev_priv)) {
1213                 u32 port_sel;
1214
1215                 pp_reg = PP_CONTROL(0);
1216                 port_sel = I915_READ(PP_ON_DELAYS(0)) & PANEL_PORT_SELECT_MASK;
1217
1218                 switch (port_sel) {
1219                 case PANEL_PORT_SELECT_LVDS:
1220                         intel_lvds_port_enabled(dev_priv, PCH_LVDS, &panel_pipe);
1221                         break;
1222                 case PANEL_PORT_SELECT_DPA:
1223                         intel_dp_port_enabled(dev_priv, DP_A, PORT_A, &panel_pipe);
1224                         break;
1225                 case PANEL_PORT_SELECT_DPC:
1226                         intel_dp_port_enabled(dev_priv, PCH_DP_C, PORT_C, &panel_pipe);
1227                         break;
1228                 case PANEL_PORT_SELECT_DPD:
1229                         intel_dp_port_enabled(dev_priv, PCH_DP_D, PORT_D, &panel_pipe);
1230                         break;
1231                 default:
1232                         MISSING_CASE(port_sel);
1233                         break;
1234                 }
1235         } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
1236                 /* presumably write lock depends on pipe, not port select */
1237                 pp_reg = PP_CONTROL(pipe);
1238                 panel_pipe = pipe;
1239         } else {
1240                 u32 port_sel;
1241
1242                 pp_reg = PP_CONTROL(0);
1243                 port_sel = I915_READ(PP_ON_DELAYS(0)) & PANEL_PORT_SELECT_MASK;
1244
1245                 WARN_ON(port_sel != PANEL_PORT_SELECT_LVDS);
1246                 intel_lvds_port_enabled(dev_priv, LVDS, &panel_pipe);
1247         }
1248
1249         val = I915_READ(pp_reg);
1250         if (!(val & PANEL_POWER_ON) ||
1251             ((val & PANEL_UNLOCK_MASK) == PANEL_UNLOCK_REGS))
1252                 locked = false;
1253
1254         I915_STATE_WARN(panel_pipe == pipe && locked,
1255              "panel assertion failure, pipe %c regs locked\n",
1256              pipe_name(pipe));
1257 }
1258
1259 void assert_pipe(struct drm_i915_private *dev_priv,
1260                  enum pipe pipe, bool state)
1261 {
1262         bool cur_state;
1263         enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
1264                                                                       pipe);
1265         enum intel_display_power_domain power_domain;
1266
1267         /* we keep both pipes enabled on 830 */
1268         if (IS_I830(dev_priv))
1269                 state = true;
1270
1271         power_domain = POWER_DOMAIN_TRANSCODER(cpu_transcoder);
1272         if (intel_display_power_get_if_enabled(dev_priv, power_domain)) {
1273                 u32 val = I915_READ(PIPECONF(cpu_transcoder));
1274                 cur_state = !!(val & PIPECONF_ENABLE);
1275
1276                 intel_display_power_put(dev_priv, power_domain);
1277         } else {
1278                 cur_state = false;
1279         }
1280
1281         I915_STATE_WARN(cur_state != state,
1282              "pipe %c assertion failure (expected %s, current %s)\n",
1283                         pipe_name(pipe), onoff(state), onoff(cur_state));
1284 }
1285
1286 static void assert_plane(struct intel_plane *plane, bool state)
1287 {
1288         enum pipe pipe;
1289         bool cur_state;
1290
1291         cur_state = plane->get_hw_state(plane, &pipe);
1292
1293         I915_STATE_WARN(cur_state != state,
1294                         "%s assertion failure (expected %s, current %s)\n",
1295                         plane->base.name, onoff(state), onoff(cur_state));
1296 }
1297
1298 #define assert_plane_enabled(p) assert_plane(p, true)
1299 #define assert_plane_disabled(p) assert_plane(p, false)
1300
1301 static void assert_planes_disabled(struct intel_crtc *crtc)
1302 {
1303         struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1304         struct intel_plane *plane;
1305
1306         for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane)
1307                 assert_plane_disabled(plane);
1308 }
1309
1310 static void assert_vblank_disabled(struct drm_crtc *crtc)
1311 {
1312         if (I915_STATE_WARN_ON(drm_crtc_vblank_get(crtc) == 0))
1313                 drm_crtc_vblank_put(crtc);
1314 }
1315
1316 void assert_pch_transcoder_disabled(struct drm_i915_private *dev_priv,
1317                                     enum pipe pipe)
1318 {
1319         u32 val;
1320         bool enabled;
1321
1322         val = I915_READ(PCH_TRANSCONF(pipe));
1323         enabled = !!(val & TRANS_ENABLE);
1324         I915_STATE_WARN(enabled,
1325              "transcoder assertion failed, should be off on pipe %c but is still active\n",
1326              pipe_name(pipe));
1327 }
1328
1329 static void assert_pch_dp_disabled(struct drm_i915_private *dev_priv,
1330                                    enum pipe pipe, enum port port,
1331                                    i915_reg_t dp_reg)
1332 {
1333         enum pipe port_pipe;
1334         bool state;
1335
1336         state = intel_dp_port_enabled(dev_priv, dp_reg, port, &port_pipe);
1337
1338         I915_STATE_WARN(state && port_pipe == pipe,
1339                         "PCH DP %c enabled on transcoder %c, should be disabled\n",
1340                         port_name(port), pipe_name(pipe));
1341
1342         I915_STATE_WARN(HAS_PCH_IBX(dev_priv) && !state && port_pipe == PIPE_B,
1343                         "IBX PCH DP %c still using transcoder B\n",
1344                         port_name(port));
1345 }
1346
1347 static void assert_pch_hdmi_disabled(struct drm_i915_private *dev_priv,
1348                                      enum pipe pipe, enum port port,
1349                                      i915_reg_t hdmi_reg)
1350 {
1351         enum pipe port_pipe;
1352         bool state;
1353
1354         state = intel_sdvo_port_enabled(dev_priv, hdmi_reg, &port_pipe);
1355
1356         I915_STATE_WARN(state && port_pipe == pipe,
1357                         "PCH HDMI %c enabled on transcoder %c, should be disabled\n",
1358                         port_name(port), pipe_name(pipe));
1359
1360         I915_STATE_WARN(HAS_PCH_IBX(dev_priv) && !state && port_pipe == PIPE_B,
1361                         "IBX PCH HDMI %c still using transcoder B\n",
1362                         port_name(port));
1363 }
1364
1365 static void assert_pch_ports_disabled(struct drm_i915_private *dev_priv,
1366                                       enum pipe pipe)
1367 {
1368         enum pipe port_pipe;
1369
1370         assert_pch_dp_disabled(dev_priv, pipe, PORT_B, PCH_DP_B);
1371         assert_pch_dp_disabled(dev_priv, pipe, PORT_C, PCH_DP_C);
1372         assert_pch_dp_disabled(dev_priv, pipe, PORT_D, PCH_DP_D);
1373
1374         I915_STATE_WARN(intel_crt_port_enabled(dev_priv, PCH_ADPA, &port_pipe) &&
1375                         port_pipe == pipe,
1376                         "PCH VGA enabled on transcoder %c, should be disabled\n",
1377                         pipe_name(pipe));
1378
1379         I915_STATE_WARN(intel_lvds_port_enabled(dev_priv, PCH_LVDS, &port_pipe) &&
1380                         port_pipe == pipe,
1381                         "PCH LVDS enabled on transcoder %c, should be disabled\n",
1382                         pipe_name(pipe));
1383
1384         assert_pch_hdmi_disabled(dev_priv, pipe, PORT_B, PCH_HDMIB);
1385         assert_pch_hdmi_disabled(dev_priv, pipe, PORT_C, PCH_HDMIC);
1386         assert_pch_hdmi_disabled(dev_priv, pipe, PORT_D, PCH_HDMID);
1387 }
1388
1389 static void _vlv_enable_pll(struct intel_crtc *crtc,
1390                             const struct intel_crtc_state *pipe_config)
1391 {
1392         struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1393         enum pipe pipe = crtc->pipe;
1394
1395         I915_WRITE(DPLL(pipe), pipe_config->dpll_hw_state.dpll);
1396         POSTING_READ(DPLL(pipe));
1397         udelay(150);
1398
1399         if (intel_wait_for_register(dev_priv,
1400                                     DPLL(pipe),
1401                                     DPLL_LOCK_VLV,
1402                                     DPLL_LOCK_VLV,
1403                                     1))
1404                 DRM_ERROR("DPLL %d failed to lock\n", pipe);
1405 }
1406
1407 static void vlv_enable_pll(struct intel_crtc *crtc,
1408                            const struct intel_crtc_state *pipe_config)
1409 {
1410         struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1411         enum pipe pipe = crtc->pipe;
1412
1413         assert_pipe_disabled(dev_priv, pipe);
1414
1415         /* PLL is protected by panel, make sure we can write it */
1416         assert_panel_unlocked(dev_priv, pipe);
1417
1418         if (pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE)
1419                 _vlv_enable_pll(crtc, pipe_config);
1420
1421         I915_WRITE(DPLL_MD(pipe), pipe_config->dpll_hw_state.dpll_md);
1422         POSTING_READ(DPLL_MD(pipe));
1423 }
1424
1425
1426 static void _chv_enable_pll(struct intel_crtc *crtc,
1427                             const struct intel_crtc_state *pipe_config)
1428 {
1429         struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1430         enum pipe pipe = crtc->pipe;
1431         enum dpio_channel port = vlv_pipe_to_channel(pipe);
1432         u32 tmp;
1433
1434         mutex_lock(&dev_priv->sb_lock);
1435
1436         /* Enable back the 10bit clock to display controller */
1437         tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW14(port));
1438         tmp |= DPIO_DCLKP_EN;
1439         vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW14(port), tmp);
1440
1441         mutex_unlock(&dev_priv->sb_lock);
1442
1443         /*
1444          * Need to wait > 100ns between dclkp clock enable bit and PLL enable.
1445          */
1446         udelay(1);
1447
1448         /* Enable PLL */
1449         I915_WRITE(DPLL(pipe), pipe_config->dpll_hw_state.dpll);
1450
1451         /* Check PLL is locked */
1452         if (intel_wait_for_register(dev_priv,
1453                                     DPLL(pipe), DPLL_LOCK_VLV, DPLL_LOCK_VLV,
1454                                     1))
1455                 DRM_ERROR("PLL %d failed to lock\n", pipe);
1456 }
1457
1458 static void chv_enable_pll(struct intel_crtc *crtc,
1459                            const struct intel_crtc_state *pipe_config)
1460 {
1461         struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1462         enum pipe pipe = crtc->pipe;
1463
1464         assert_pipe_disabled(dev_priv, pipe);
1465
1466         /* PLL is protected by panel, make sure we can write it */
1467         assert_panel_unlocked(dev_priv, pipe);
1468
1469         if (pipe_config->dpll_hw_state.dpll & DPLL_VCO_ENABLE)
1470                 _chv_enable_pll(crtc, pipe_config);
1471
1472         if (pipe != PIPE_A) {
1473                 /*
1474                  * WaPixelRepeatModeFixForC0:chv
1475                  *
1476                  * DPLLCMD is AWOL. Use chicken bits to propagate
1477                  * the value from DPLLBMD to either pipe B or C.
1478                  */
1479                 I915_WRITE(CBR4_VLV, CBR_DPLLBMD_PIPE(pipe));
1480                 I915_WRITE(DPLL_MD(PIPE_B), pipe_config->dpll_hw_state.dpll_md);
1481                 I915_WRITE(CBR4_VLV, 0);
1482                 dev_priv->chv_dpll_md[pipe] = pipe_config->dpll_hw_state.dpll_md;
1483
1484                 /*
1485                  * DPLLB VGA mode also seems to cause problems.
1486                  * We should always have it disabled.
1487                  */
1488                 WARN_ON((I915_READ(DPLL(PIPE_B)) & DPLL_VGA_MODE_DIS) == 0);
1489         } else {
1490                 I915_WRITE(DPLL_MD(pipe), pipe_config->dpll_hw_state.dpll_md);
1491                 POSTING_READ(DPLL_MD(pipe));
1492         }
1493 }
1494
1495 static int intel_num_dvo_pipes(struct drm_i915_private *dev_priv)
1496 {
1497         struct intel_crtc *crtc;
1498         int count = 0;
1499
1500         for_each_intel_crtc(&dev_priv->drm, crtc) {
1501                 count += crtc->base.state->active &&
1502                         intel_crtc_has_type(crtc->config, INTEL_OUTPUT_DVO);
1503         }
1504
1505         return count;
1506 }
1507
1508 static void i9xx_enable_pll(struct intel_crtc *crtc,
1509                             const struct intel_crtc_state *crtc_state)
1510 {
1511         struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1512         i915_reg_t reg = DPLL(crtc->pipe);
1513         u32 dpll = crtc_state->dpll_hw_state.dpll;
1514         int i;
1515
1516         assert_pipe_disabled(dev_priv, crtc->pipe);
1517
1518         /* PLL is protected by panel, make sure we can write it */
1519         if (IS_MOBILE(dev_priv) && !IS_I830(dev_priv))
1520                 assert_panel_unlocked(dev_priv, crtc->pipe);
1521
1522         /* Enable DVO 2x clock on both PLLs if necessary */
1523         if (IS_I830(dev_priv) && intel_num_dvo_pipes(dev_priv) > 0) {
1524                 /*
1525                  * It appears to be important that we don't enable this
1526                  * for the current pipe before otherwise configuring the
1527                  * PLL. No idea how this should be handled if multiple
1528                  * DVO outputs are enabled simultaneosly.
1529                  */
1530                 dpll |= DPLL_DVO_2X_MODE;
1531                 I915_WRITE(DPLL(!crtc->pipe),
1532                            I915_READ(DPLL(!crtc->pipe)) | DPLL_DVO_2X_MODE);
1533         }
1534
1535         /*
1536          * Apparently we need to have VGA mode enabled prior to changing
1537          * the P1/P2 dividers. Otherwise the DPLL will keep using the old
1538          * dividers, even though the register value does change.
1539          */
1540         I915_WRITE(reg, 0);
1541
1542         I915_WRITE(reg, dpll);
1543
1544         /* Wait for the clocks to stabilize. */
1545         POSTING_READ(reg);
1546         udelay(150);
1547
1548         if (INTEL_GEN(dev_priv) >= 4) {
1549                 I915_WRITE(DPLL_MD(crtc->pipe),
1550                            crtc_state->dpll_hw_state.dpll_md);
1551         } else {
1552                 /* The pixel multiplier can only be updated once the
1553                  * DPLL is enabled and the clocks are stable.
1554                  *
1555                  * So write it again.
1556                  */
1557                 I915_WRITE(reg, dpll);
1558         }
1559
1560         /* We do this three times for luck */
1561         for (i = 0; i < 3; i++) {
1562                 I915_WRITE(reg, dpll);
1563                 POSTING_READ(reg);
1564                 udelay(150); /* wait for warmup */
1565         }
1566 }
1567
1568 static void i9xx_disable_pll(struct intel_crtc *crtc)
1569 {
1570         struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1571         enum pipe pipe = crtc->pipe;
1572
1573         /* Disable DVO 2x clock on both PLLs if necessary */
1574         if (IS_I830(dev_priv) &&
1575             intel_crtc_has_type(crtc->config, INTEL_OUTPUT_DVO) &&
1576             !intel_num_dvo_pipes(dev_priv)) {
1577                 I915_WRITE(DPLL(PIPE_B),
1578                            I915_READ(DPLL(PIPE_B)) & ~DPLL_DVO_2X_MODE);
1579                 I915_WRITE(DPLL(PIPE_A),
1580                            I915_READ(DPLL(PIPE_A)) & ~DPLL_DVO_2X_MODE);
1581         }
1582
1583         /* Don't disable pipe or pipe PLLs if needed */
1584         if (IS_I830(dev_priv))
1585                 return;
1586
1587         /* Make sure the pipe isn't still relying on us */
1588         assert_pipe_disabled(dev_priv, pipe);
1589
1590         I915_WRITE(DPLL(pipe), DPLL_VGA_MODE_DIS);
1591         POSTING_READ(DPLL(pipe));
1592 }
1593
1594 static void vlv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
1595 {
1596         u32 val;
1597
1598         /* Make sure the pipe isn't still relying on us */
1599         assert_pipe_disabled(dev_priv, pipe);
1600
1601         val = DPLL_INTEGRATED_REF_CLK_VLV |
1602                 DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
1603         if (pipe != PIPE_A)
1604                 val |= DPLL_INTEGRATED_CRI_CLK_VLV;
1605
1606         I915_WRITE(DPLL(pipe), val);
1607         POSTING_READ(DPLL(pipe));
1608 }
1609
1610 static void chv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
1611 {
1612         enum dpio_channel port = vlv_pipe_to_channel(pipe);
1613         u32 val;
1614
1615         /* Make sure the pipe isn't still relying on us */
1616         assert_pipe_disabled(dev_priv, pipe);
1617
1618         val = DPLL_SSC_REF_CLK_CHV |
1619                 DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
1620         if (pipe != PIPE_A)
1621                 val |= DPLL_INTEGRATED_CRI_CLK_VLV;
1622
1623         I915_WRITE(DPLL(pipe), val);
1624         POSTING_READ(DPLL(pipe));
1625
1626         mutex_lock(&dev_priv->sb_lock);
1627
1628         /* Disable 10bit clock to display controller */
1629         val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW14(port));
1630         val &= ~DPIO_DCLKP_EN;
1631         vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW14(port), val);
1632
1633         mutex_unlock(&dev_priv->sb_lock);
1634 }
1635
1636 void vlv_wait_port_ready(struct drm_i915_private *dev_priv,
1637                          struct intel_digital_port *dport,
1638                          unsigned int expected_mask)
1639 {
1640         u32 port_mask;
1641         i915_reg_t dpll_reg;
1642
1643         switch (dport->base.port) {
1644         case PORT_B:
1645                 port_mask = DPLL_PORTB_READY_MASK;
1646                 dpll_reg = DPLL(0);
1647                 break;
1648         case PORT_C:
1649                 port_mask = DPLL_PORTC_READY_MASK;
1650                 dpll_reg = DPLL(0);
1651                 expected_mask <<= 4;
1652                 break;
1653         case PORT_D:
1654                 port_mask = DPLL_PORTD_READY_MASK;
1655                 dpll_reg = DPIO_PHY_STATUS;
1656                 break;
1657         default:
1658                 BUG();
1659         }
1660
1661         if (intel_wait_for_register(dev_priv,
1662                                     dpll_reg, port_mask, expected_mask,
1663                                     1000))
1664                 WARN(1, "timed out waiting for port %c ready: got 0x%x, expected 0x%x\n",
1665                      port_name(dport->base.port),
1666                      I915_READ(dpll_reg) & port_mask, expected_mask);
1667 }
1668
1669 static void ironlake_enable_pch_transcoder(struct drm_i915_private *dev_priv,
1670                                            enum pipe pipe)
1671 {
1672         struct intel_crtc *intel_crtc = intel_get_crtc_for_pipe(dev_priv,
1673                                                                 pipe);
1674         i915_reg_t reg;
1675         uint32_t val, pipeconf_val;
1676
1677         /* Make sure PCH DPLL is enabled */
1678         assert_shared_dpll_enabled(dev_priv, intel_crtc->config->shared_dpll);
1679
1680         /* FDI must be feeding us bits for PCH ports */
1681         assert_fdi_tx_enabled(dev_priv, pipe);
1682         assert_fdi_rx_enabled(dev_priv, pipe);
1683
1684         if (HAS_PCH_CPT(dev_priv)) {
1685                 /* Workaround: Set the timing override bit before enabling the
1686                  * pch transcoder. */
1687                 reg = TRANS_CHICKEN2(pipe);
1688                 val = I915_READ(reg);
1689                 val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
1690                 I915_WRITE(reg, val);
1691         }
1692
1693         reg = PCH_TRANSCONF(pipe);
1694         val = I915_READ(reg);
1695         pipeconf_val = I915_READ(PIPECONF(pipe));
1696
1697         if (HAS_PCH_IBX(dev_priv)) {
1698                 /*
1699                  * Make the BPC in transcoder be consistent with
1700                  * that in pipeconf reg. For HDMI we must use 8bpc
1701                  * here for both 8bpc and 12bpc.
1702                  */
1703                 val &= ~PIPECONF_BPC_MASK;
1704                 if (intel_crtc_has_type(intel_crtc->config, INTEL_OUTPUT_HDMI))
1705                         val |= PIPECONF_8BPC;
1706                 else
1707                         val |= pipeconf_val & PIPECONF_BPC_MASK;
1708         }
1709
1710         val &= ~TRANS_INTERLACE_MASK;
1711         if ((pipeconf_val & PIPECONF_INTERLACE_MASK) == PIPECONF_INTERLACED_ILK)
1712                 if (HAS_PCH_IBX(dev_priv) &&
1713                     intel_crtc_has_type(intel_crtc->config, INTEL_OUTPUT_SDVO))
1714                         val |= TRANS_LEGACY_INTERLACED_ILK;
1715                 else
1716                         val |= TRANS_INTERLACED;
1717         else
1718                 val |= TRANS_PROGRESSIVE;
1719
1720         I915_WRITE(reg, val | TRANS_ENABLE);
1721         if (intel_wait_for_register(dev_priv,
1722                                     reg, TRANS_STATE_ENABLE, TRANS_STATE_ENABLE,
1723                                     100))
1724                 DRM_ERROR("failed to enable transcoder %c\n", pipe_name(pipe));
1725 }
1726
1727 static void lpt_enable_pch_transcoder(struct drm_i915_private *dev_priv,
1728                                       enum transcoder cpu_transcoder)
1729 {
1730         u32 val, pipeconf_val;
1731
1732         /* FDI must be feeding us bits for PCH ports */
1733         assert_fdi_tx_enabled(dev_priv, (enum pipe) cpu_transcoder);
1734         assert_fdi_rx_enabled(dev_priv, PIPE_A);
1735
1736         /* Workaround: set timing override bit. */
1737         val = I915_READ(TRANS_CHICKEN2(PIPE_A));
1738         val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
1739         I915_WRITE(TRANS_CHICKEN2(PIPE_A), val);
1740
1741         val = TRANS_ENABLE;
1742         pipeconf_val = I915_READ(PIPECONF(cpu_transcoder));
1743
1744         if ((pipeconf_val & PIPECONF_INTERLACE_MASK_HSW) ==
1745             PIPECONF_INTERLACED_ILK)
1746                 val |= TRANS_INTERLACED;
1747         else
1748                 val |= TRANS_PROGRESSIVE;
1749
1750         I915_WRITE(LPT_TRANSCONF, val);
1751         if (intel_wait_for_register(dev_priv,
1752                                     LPT_TRANSCONF,
1753                                     TRANS_STATE_ENABLE,
1754                                     TRANS_STATE_ENABLE,
1755                                     100))
1756                 DRM_ERROR("Failed to enable PCH transcoder\n");
1757 }
1758
1759 static void ironlake_disable_pch_transcoder(struct drm_i915_private *dev_priv,
1760                                             enum pipe pipe)
1761 {
1762         i915_reg_t reg;
1763         uint32_t val;
1764
1765         /* FDI relies on the transcoder */
1766         assert_fdi_tx_disabled(dev_priv, pipe);
1767         assert_fdi_rx_disabled(dev_priv, pipe);
1768
1769         /* Ports must be off as well */
1770         assert_pch_ports_disabled(dev_priv, pipe);
1771
1772         reg = PCH_TRANSCONF(pipe);
1773         val = I915_READ(reg);
1774         val &= ~TRANS_ENABLE;
1775         I915_WRITE(reg, val);
1776         /* wait for PCH transcoder off, transcoder state */
1777         if (intel_wait_for_register(dev_priv,
1778                                     reg, TRANS_STATE_ENABLE, 0,
1779                                     50))
1780                 DRM_ERROR("failed to disable transcoder %c\n", pipe_name(pipe));
1781
1782         if (HAS_PCH_CPT(dev_priv)) {
1783                 /* Workaround: Clear the timing override chicken bit again. */
1784                 reg = TRANS_CHICKEN2(pipe);
1785                 val = I915_READ(reg);
1786                 val &= ~TRANS_CHICKEN2_TIMING_OVERRIDE;
1787                 I915_WRITE(reg, val);
1788         }
1789 }
1790
1791 void lpt_disable_pch_transcoder(struct drm_i915_private *dev_priv)
1792 {
1793         u32 val;
1794
1795         val = I915_READ(LPT_TRANSCONF);
1796         val &= ~TRANS_ENABLE;
1797         I915_WRITE(LPT_TRANSCONF, val);
1798         /* wait for PCH transcoder off, transcoder state */
1799         if (intel_wait_for_register(dev_priv,
1800                                     LPT_TRANSCONF, TRANS_STATE_ENABLE, 0,
1801                                     50))
1802                 DRM_ERROR("Failed to disable PCH transcoder\n");
1803
1804         /* Workaround: clear timing override bit. */
1805         val = I915_READ(TRANS_CHICKEN2(PIPE_A));
1806         val &= ~TRANS_CHICKEN2_TIMING_OVERRIDE;
1807         I915_WRITE(TRANS_CHICKEN2(PIPE_A), val);
1808 }
1809
1810 enum pipe intel_crtc_pch_transcoder(struct intel_crtc *crtc)
1811 {
1812         struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1813
1814         if (HAS_PCH_LPT(dev_priv))
1815                 return PIPE_A;
1816         else
1817                 return crtc->pipe;
1818 }
1819
1820 static void intel_enable_pipe(const struct intel_crtc_state *new_crtc_state)
1821 {
1822         struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->base.crtc);
1823         struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1824         enum transcoder cpu_transcoder = new_crtc_state->cpu_transcoder;
1825         enum pipe pipe = crtc->pipe;
1826         i915_reg_t reg;
1827         u32 val;
1828
1829         DRM_DEBUG_KMS("enabling pipe %c\n", pipe_name(pipe));
1830
1831         assert_planes_disabled(crtc);
1832
1833         /*
1834          * A pipe without a PLL won't actually be able to drive bits from
1835          * a plane.  On ILK+ the pipe PLLs are integrated, so we don't
1836          * need the check.
1837          */
1838         if (HAS_GMCH_DISPLAY(dev_priv)) {
1839                 if (intel_crtc_has_type(new_crtc_state, INTEL_OUTPUT_DSI))
1840                         assert_dsi_pll_enabled(dev_priv);
1841                 else
1842                         assert_pll_enabled(dev_priv, pipe);
1843         } else {
1844                 if (new_crtc_state->has_pch_encoder) {
1845                         /* if driving the PCH, we need FDI enabled */
1846                         assert_fdi_rx_pll_enabled(dev_priv,
1847                                                   intel_crtc_pch_transcoder(crtc));
1848                         assert_fdi_tx_pll_enabled(dev_priv,
1849                                                   (enum pipe) cpu_transcoder);
1850                 }
1851                 /* FIXME: assert CPU port conditions for SNB+ */
1852         }
1853
1854         reg = PIPECONF(cpu_transcoder);
1855         val = I915_READ(reg);
1856         if (val & PIPECONF_ENABLE) {
1857                 /* we keep both pipes enabled on 830 */
1858                 WARN_ON(!IS_I830(dev_priv));
1859                 return;
1860         }
1861
1862         I915_WRITE(reg, val | PIPECONF_ENABLE);
1863         POSTING_READ(reg);
1864
1865         /*
1866          * Until the pipe starts PIPEDSL reads will return a stale value,
1867          * which causes an apparent vblank timestamp jump when PIPEDSL
1868          * resets to its proper value. That also messes up the frame count
1869          * when it's derived from the timestamps. So let's wait for the
1870          * pipe to start properly before we call drm_crtc_vblank_on()
1871          */
1872         if (dev_priv->drm.max_vblank_count == 0)
1873                 intel_wait_for_pipe_scanline_moving(crtc);
1874 }
1875
1876 static void intel_disable_pipe(const struct intel_crtc_state *old_crtc_state)
1877 {
1878         struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
1879         struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1880         enum transcoder cpu_transcoder = old_crtc_state->cpu_transcoder;
1881         enum pipe pipe = crtc->pipe;
1882         i915_reg_t reg;
1883         u32 val;
1884
1885         DRM_DEBUG_KMS("disabling pipe %c\n", pipe_name(pipe));
1886
1887         /*
1888          * Make sure planes won't keep trying to pump pixels to us,
1889          * or we might hang the display.
1890          */
1891         assert_planes_disabled(crtc);
1892
1893         reg = PIPECONF(cpu_transcoder);
1894         val = I915_READ(reg);
1895         if ((val & PIPECONF_ENABLE) == 0)
1896                 return;
1897
1898         /*
1899          * Double wide has implications for planes
1900          * so best keep it disabled when not needed.
1901          */
1902         if (old_crtc_state->double_wide)
1903                 val &= ~PIPECONF_DOUBLE_WIDE;
1904
1905         /* Don't disable pipe or pipe PLLs if needed */
1906         if (!IS_I830(dev_priv))
1907                 val &= ~PIPECONF_ENABLE;
1908
1909         I915_WRITE(reg, val);
1910         if ((val & PIPECONF_ENABLE) == 0)
1911                 intel_wait_for_pipe_off(old_crtc_state);
1912 }
1913
1914 static unsigned int intel_tile_size(const struct drm_i915_private *dev_priv)
1915 {
1916         return IS_GEN2(dev_priv) ? 2048 : 4096;
1917 }
1918
1919 static unsigned int
1920 intel_tile_width_bytes(const struct drm_framebuffer *fb, int plane)
1921 {
1922         struct drm_i915_private *dev_priv = to_i915(fb->dev);
1923         unsigned int cpp = fb->format->cpp[plane];
1924
1925         switch (fb->modifier) {
1926         case DRM_FORMAT_MOD_LINEAR:
1927                 return cpp;
1928         case I915_FORMAT_MOD_X_TILED:
1929                 if (IS_GEN2(dev_priv))
1930                         return 128;
1931                 else
1932                         return 512;
1933         case I915_FORMAT_MOD_Y_TILED_CCS:
1934                 if (plane == 1)
1935                         return 128;
1936                 /* fall through */
1937         case I915_FORMAT_MOD_Y_TILED:
1938                 if (IS_GEN2(dev_priv) || HAS_128_BYTE_Y_TILING(dev_priv))
1939                         return 128;
1940                 else
1941                         return 512;
1942         case I915_FORMAT_MOD_Yf_TILED_CCS:
1943                 if (plane == 1)
1944                         return 128;
1945                 /* fall through */
1946         case I915_FORMAT_MOD_Yf_TILED:
1947                 switch (cpp) {
1948                 case 1:
1949                         return 64;
1950                 case 2:
1951                 case 4:
1952                         return 128;
1953                 case 8:
1954                 case 16:
1955                         return 256;
1956                 default:
1957                         MISSING_CASE(cpp);
1958                         return cpp;
1959                 }
1960                 break;
1961         default:
1962                 MISSING_CASE(fb->modifier);
1963                 return cpp;
1964         }
1965 }
1966
1967 static unsigned int
1968 intel_tile_height(const struct drm_framebuffer *fb, int plane)
1969 {
1970         if (fb->modifier == DRM_FORMAT_MOD_LINEAR)
1971                 return 1;
1972         else
1973                 return intel_tile_size(to_i915(fb->dev)) /
1974                         intel_tile_width_bytes(fb, plane);
1975 }
1976
1977 /* Return the tile dimensions in pixel units */
1978 static void intel_tile_dims(const struct drm_framebuffer *fb, int plane,
1979                             unsigned int *tile_width,
1980                             unsigned int *tile_height)
1981 {
1982         unsigned int tile_width_bytes = intel_tile_width_bytes(fb, plane);
1983         unsigned int cpp = fb->format->cpp[plane];
1984
1985         *tile_width = tile_width_bytes / cpp;
1986         *tile_height = intel_tile_size(to_i915(fb->dev)) / tile_width_bytes;
1987 }
1988
1989 unsigned int
1990 intel_fb_align_height(const struct drm_framebuffer *fb,
1991                       int plane, unsigned int height)
1992 {
1993         unsigned int tile_height = intel_tile_height(fb, plane);
1994
1995         return ALIGN(height, tile_height);
1996 }
1997
1998 unsigned int intel_rotation_info_size(const struct intel_rotation_info *rot_info)
1999 {
2000         unsigned int size = 0;
2001         int i;
2002
2003         for (i = 0 ; i < ARRAY_SIZE(rot_info->plane); i++)
2004                 size += rot_info->plane[i].width * rot_info->plane[i].height;
2005
2006         return size;
2007 }
2008
2009 static void
2010 intel_fill_fb_ggtt_view(struct i915_ggtt_view *view,
2011                         const struct drm_framebuffer *fb,
2012                         unsigned int rotation)
2013 {
2014         view->type = I915_GGTT_VIEW_NORMAL;
2015         if (drm_rotation_90_or_270(rotation)) {
2016                 view->type = I915_GGTT_VIEW_ROTATED;
2017                 view->rotated = to_intel_framebuffer(fb)->rot_info;
2018         }
2019 }
2020
2021 static unsigned int intel_cursor_alignment(const struct drm_i915_private *dev_priv)
2022 {
2023         if (IS_I830(dev_priv))
2024                 return 16 * 1024;
2025         else if (IS_I85X(dev_priv))
2026                 return 256;
2027         else if (IS_I845G(dev_priv) || IS_I865G(dev_priv))
2028                 return 32;
2029         else
2030                 return 4 * 1024;
2031 }
2032
2033 static unsigned int intel_linear_alignment(const struct drm_i915_private *dev_priv)
2034 {
2035         if (INTEL_GEN(dev_priv) >= 9)
2036                 return 256 * 1024;
2037         else if (IS_I965G(dev_priv) || IS_I965GM(dev_priv) ||
2038                  IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
2039                 return 128 * 1024;
2040         else if (INTEL_GEN(dev_priv) >= 4)
2041                 return 4 * 1024;
2042         else
2043                 return 0;
2044 }
2045
2046 static unsigned int intel_surf_alignment(const struct drm_framebuffer *fb,
2047                                          int plane)
2048 {
2049         struct drm_i915_private *dev_priv = to_i915(fb->dev);
2050
2051         /* AUX_DIST needs only 4K alignment */
2052         if (plane == 1)
2053                 return 4096;
2054
2055         switch (fb->modifier) {
2056         case DRM_FORMAT_MOD_LINEAR:
2057                 return intel_linear_alignment(dev_priv);
2058         case I915_FORMAT_MOD_X_TILED:
2059                 if (INTEL_GEN(dev_priv) >= 9)
2060                         return 256 * 1024;
2061                 return 0;
2062         case I915_FORMAT_MOD_Y_TILED_CCS:
2063         case I915_FORMAT_MOD_Yf_TILED_CCS:
2064         case I915_FORMAT_MOD_Y_TILED:
2065         case I915_FORMAT_MOD_Yf_TILED:
2066                 return 1 * 1024 * 1024;
2067         default:
2068                 MISSING_CASE(fb->modifier);
2069                 return 0;
2070         }
2071 }
2072
2073 static bool intel_plane_uses_fence(const struct intel_plane_state *plane_state)
2074 {
2075         struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
2076         struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
2077
2078         return INTEL_GEN(dev_priv) < 4 || plane->has_fbc;
2079 }
2080
2081 struct i915_vma *
2082 intel_pin_and_fence_fb_obj(struct drm_framebuffer *fb,
2083                            unsigned int rotation,
2084                            bool uses_fence,
2085                            unsigned long *out_flags)
2086 {
2087         struct drm_device *dev = fb->dev;
2088         struct drm_i915_private *dev_priv = to_i915(dev);
2089         struct drm_i915_gem_object *obj = intel_fb_obj(fb);
2090         struct i915_ggtt_view view;
2091         struct i915_vma *vma;
2092         unsigned int pinctl;
2093         u32 alignment;
2094
2095         WARN_ON(!mutex_is_locked(&dev->struct_mutex));
2096
2097         alignment = intel_surf_alignment(fb, 0);
2098
2099         intel_fill_fb_ggtt_view(&view, fb, rotation);
2100
2101         /* Note that the w/a also requires 64 PTE of padding following the
2102          * bo. We currently fill all unused PTE with the shadow page and so
2103          * we should always have valid PTE following the scanout preventing
2104          * the VT-d warning.
2105          */
2106         if (intel_scanout_needs_vtd_wa(dev_priv) && alignment < 256 * 1024)
2107                 alignment = 256 * 1024;
2108
2109         /*
2110          * Global gtt pte registers are special registers which actually forward
2111          * writes to a chunk of system memory. Which means that there is no risk
2112          * that the register values disappear as soon as we call
2113          * intel_runtime_pm_put(), so it is correct to wrap only the
2114          * pin/unpin/fence and not more.
2115          */
2116         intel_runtime_pm_get(dev_priv);
2117
2118         atomic_inc(&dev_priv->gpu_error.pending_fb_pin);
2119
2120         pinctl = 0;
2121
2122         /* Valleyview is definitely limited to scanning out the first
2123          * 512MiB. Lets presume this behaviour was inherited from the
2124          * g4x display engine and that all earlier gen are similarly
2125          * limited. Testing suggests that it is a little more
2126          * complicated than this. For example, Cherryview appears quite
2127          * happy to scanout from anywhere within its global aperture.
2128          */
2129         if (HAS_GMCH_DISPLAY(dev_priv))
2130                 pinctl |= PIN_MAPPABLE;
2131
2132         vma = i915_gem_object_pin_to_display_plane(obj,
2133                                                    alignment, &view, pinctl);
2134         if (IS_ERR(vma))
2135                 goto err;
2136
2137         if (uses_fence && i915_vma_is_map_and_fenceable(vma)) {
2138                 int ret;
2139
2140                 /* Install a fence for tiled scan-out. Pre-i965 always needs a
2141                  * fence, whereas 965+ only requires a fence if using
2142                  * framebuffer compression.  For simplicity, we always, when
2143                  * possible, install a fence as the cost is not that onerous.
2144                  *
2145                  * If we fail to fence the tiled scanout, then either the
2146                  * modeset will reject the change (which is highly unlikely as
2147                  * the affected systems, all but one, do not have unmappable
2148                  * space) or we will not be able to enable full powersaving
2149                  * techniques (also likely not to apply due to various limits
2150                  * FBC and the like impose on the size of the buffer, which
2151                  * presumably we violated anyway with this unmappable buffer).
2152                  * Anyway, it is presumably better to stumble onwards with
2153                  * something and try to run the system in a "less than optimal"
2154                  * mode that matches the user configuration.
2155                  */
2156                 ret = i915_vma_pin_fence(vma);
2157                 if (ret != 0 && INTEL_GEN(dev_priv) < 4) {
2158                         i915_gem_object_unpin_from_display_plane(vma);
2159                         vma = ERR_PTR(ret);
2160                         goto err;
2161                 }
2162
2163                 if (ret == 0 && vma->fence)
2164                         *out_flags |= PLANE_HAS_FENCE;
2165         }
2166
2167         i915_vma_get(vma);
2168 err:
2169         atomic_dec(&dev_priv->gpu_error.pending_fb_pin);
2170
2171         intel_runtime_pm_put(dev_priv);
2172         return vma;
2173 }
2174
2175 void intel_unpin_fb_vma(struct i915_vma *vma, unsigned long flags)
2176 {
2177         lockdep_assert_held(&vma->vm->i915->drm.struct_mutex);
2178
2179         if (flags & PLANE_HAS_FENCE)
2180                 i915_vma_unpin_fence(vma);
2181         i915_gem_object_unpin_from_display_plane(vma);
2182         i915_vma_put(vma);
2183 }
2184
2185 static int intel_fb_pitch(const struct drm_framebuffer *fb, int plane,
2186                           unsigned int rotation)
2187 {
2188         if (drm_rotation_90_or_270(rotation))
2189                 return to_intel_framebuffer(fb)->rotated[plane].pitch;
2190         else
2191                 return fb->pitches[plane];
2192 }
2193
2194 /*
2195  * Convert the x/y offsets into a linear offset.
2196  * Only valid with 0/180 degree rotation, which is fine since linear
2197  * offset is only used with linear buffers on pre-hsw and tiled buffers
2198  * with gen2/3, and 90/270 degree rotations isn't supported on any of them.
2199  */
2200 u32 intel_fb_xy_to_linear(int x, int y,
2201                           const struct intel_plane_state *state,
2202                           int plane)
2203 {
2204         const struct drm_framebuffer *fb = state->base.fb;
2205         unsigned int cpp = fb->format->cpp[plane];
2206         unsigned int pitch = fb->pitches[plane];
2207
2208         return y * pitch + x * cpp;
2209 }
2210
2211 /*
2212  * Add the x/y offsets derived from fb->offsets[] to the user
2213  * specified plane src x/y offsets. The resulting x/y offsets
2214  * specify the start of scanout from the beginning of the gtt mapping.
2215  */
2216 void intel_add_fb_offsets(int *x, int *y,
2217                           const struct intel_plane_state *state,
2218                           int plane)
2219
2220 {
2221         const struct intel_framebuffer *intel_fb = to_intel_framebuffer(state->base.fb);
2222         unsigned int rotation = state->base.rotation;
2223
2224         if (drm_rotation_90_or_270(rotation)) {
2225                 *x += intel_fb->rotated[plane].x;
2226                 *y += intel_fb->rotated[plane].y;
2227         } else {
2228                 *x += intel_fb->normal[plane].x;
2229                 *y += intel_fb->normal[plane].y;
2230         }
2231 }
2232
2233 static u32 __intel_adjust_tile_offset(int *x, int *y,
2234                                       unsigned int tile_width,
2235                                       unsigned int tile_height,
2236                                       unsigned int tile_size,
2237                                       unsigned int pitch_tiles,
2238                                       u32 old_offset,
2239                                       u32 new_offset)
2240 {
2241         unsigned int pitch_pixels = pitch_tiles * tile_width;
2242         unsigned int tiles;
2243
2244         WARN_ON(old_offset & (tile_size - 1));
2245         WARN_ON(new_offset & (tile_size - 1));
2246         WARN_ON(new_offset > old_offset);
2247
2248         tiles = (old_offset - new_offset) / tile_size;
2249
2250         *y += tiles / pitch_tiles * tile_height;
2251         *x += tiles % pitch_tiles * tile_width;
2252
2253         /* minimize x in case it got needlessly big */
2254         *y += *x / pitch_pixels * tile_height;
2255         *x %= pitch_pixels;
2256
2257         return new_offset;
2258 }
2259
2260 static u32 _intel_adjust_tile_offset(int *x, int *y,
2261                                      const struct drm_framebuffer *fb, int plane,
2262                                      unsigned int rotation,
2263                                      u32 old_offset, u32 new_offset)
2264 {
2265         const struct drm_i915_private *dev_priv = to_i915(fb->dev);
2266         unsigned int cpp = fb->format->cpp[plane];
2267         unsigned int pitch = intel_fb_pitch(fb, plane, rotation);
2268
2269         WARN_ON(new_offset > old_offset);
2270
2271         if (fb->modifier != DRM_FORMAT_MOD_LINEAR) {
2272                 unsigned int tile_size, tile_width, tile_height;
2273                 unsigned int pitch_tiles;
2274
2275                 tile_size = intel_tile_size(dev_priv);
2276                 intel_tile_dims(fb, plane, &tile_width, &tile_height);
2277
2278                 if (drm_rotation_90_or_270(rotation)) {
2279                         pitch_tiles = pitch / tile_height;
2280                         swap(tile_width, tile_height);
2281                 } else {
2282                         pitch_tiles = pitch / (tile_width * cpp);
2283                 }
2284
2285                 __intel_adjust_tile_offset(x, y, tile_width, tile_height,
2286                                            tile_size, pitch_tiles,
2287                                            old_offset, new_offset);
2288         } else {
2289                 old_offset += *y * pitch + *x * cpp;
2290
2291                 *y = (old_offset - new_offset) / pitch;
2292                 *x = ((old_offset - new_offset) - *y * pitch) / cpp;
2293         }
2294
2295         return new_offset;
2296 }
2297
2298 /*
2299  * Adjust the tile offset by moving the difference into
2300  * the x/y offsets.
2301  */
2302 static u32 intel_adjust_tile_offset(int *x, int *y,
2303                                     const struct intel_plane_state *state, int plane,
2304                                     u32 old_offset, u32 new_offset)
2305 {
2306         return _intel_adjust_tile_offset(x, y, state->base.fb, plane,
2307                                          state->base.rotation,
2308                                          old_offset, new_offset);
2309 }
2310
2311 /*
2312  * Computes the linear offset to the base tile and adjusts
2313  * x, y. bytes per pixel is assumed to be a power-of-two.
2314  *
2315  * In the 90/270 rotated case, x and y are assumed
2316  * to be already rotated to match the rotated GTT view, and
2317  * pitch is the tile_height aligned framebuffer height.
2318  *
2319  * This function is used when computing the derived information
2320  * under intel_framebuffer, so using any of that information
2321  * here is not allowed. Anything under drm_framebuffer can be
2322  * used. This is why the user has to pass in the pitch since it
2323  * is specified in the rotated orientation.
2324  */
2325 static u32 _intel_compute_tile_offset(const struct drm_i915_private *dev_priv,
2326                                       int *x, int *y,
2327                                       const struct drm_framebuffer *fb, int plane,
2328                                       unsigned int pitch,
2329                                       unsigned int rotation,
2330                                       u32 alignment)
2331 {
2332         uint64_t fb_modifier = fb->modifier;
2333         unsigned int cpp = fb->format->cpp[plane];
2334         u32 offset, offset_aligned;
2335
2336         if (alignment)
2337                 alignment--;
2338
2339         if (fb_modifier != DRM_FORMAT_MOD_LINEAR) {
2340                 unsigned int tile_size, tile_width, tile_height;
2341                 unsigned int tile_rows, tiles, pitch_tiles;
2342
2343                 tile_size = intel_tile_size(dev_priv);
2344                 intel_tile_dims(fb, plane, &tile_width, &tile_height);
2345
2346                 if (drm_rotation_90_or_270(rotation)) {
2347                         pitch_tiles = pitch / tile_height;
2348                         swap(tile_width, tile_height);
2349                 } else {
2350                         pitch_tiles = pitch / (tile_width * cpp);
2351                 }
2352
2353                 tile_rows = *y / tile_height;
2354                 *y %= tile_height;
2355
2356                 tiles = *x / tile_width;
2357                 *x %= tile_width;
2358
2359                 offset = (tile_rows * pitch_tiles + tiles) * tile_size;
2360                 offset_aligned = offset & ~alignment;
2361
2362                 __intel_adjust_tile_offset(x, y, tile_width, tile_height,
2363                                            tile_size, pitch_tiles,
2364                                            offset, offset_aligned);
2365         } else {
2366                 offset = *y * pitch + *x * cpp;
2367                 offset_aligned = offset & ~alignment;
2368
2369                 *y = (offset & alignment) / pitch;
2370                 *x = ((offset & alignment) - *y * pitch) / cpp;
2371         }
2372
2373         return offset_aligned;
2374 }
2375
2376 u32 intel_compute_tile_offset(int *x, int *y,
2377                               const struct intel_plane_state *state,
2378                               int plane)
2379 {
2380         struct intel_plane *intel_plane = to_intel_plane(state->base.plane);
2381         struct drm_i915_private *dev_priv = to_i915(intel_plane->base.dev);
2382         const struct drm_framebuffer *fb = state->base.fb;
2383         unsigned int rotation = state->base.rotation;
2384         int pitch = intel_fb_pitch(fb, plane, rotation);
2385         u32 alignment;
2386
2387         if (intel_plane->id == PLANE_CURSOR)
2388                 alignment = intel_cursor_alignment(dev_priv);
2389         else
2390                 alignment = intel_surf_alignment(fb, plane);
2391
2392         return _intel_compute_tile_offset(dev_priv, x, y, fb, plane, pitch,
2393                                           rotation, alignment);
2394 }
2395
2396 /* Convert the fb->offset[] into x/y offsets */
2397 static int intel_fb_offset_to_xy(int *x, int *y,
2398                                  const struct drm_framebuffer *fb, int plane)
2399 {
2400         struct drm_i915_private *dev_priv = to_i915(fb->dev);
2401
2402         if (fb->modifier != DRM_FORMAT_MOD_LINEAR &&
2403             fb->offsets[plane] % intel_tile_size(dev_priv))
2404                 return -EINVAL;
2405
2406         *x = 0;
2407         *y = 0;
2408
2409         _intel_adjust_tile_offset(x, y,
2410                                   fb, plane, DRM_MODE_ROTATE_0,
2411                                   fb->offsets[plane], 0);
2412
2413         return 0;
2414 }
2415
2416 static unsigned int intel_fb_modifier_to_tiling(uint64_t fb_modifier)
2417 {
2418         switch (fb_modifier) {
2419         case I915_FORMAT_MOD_X_TILED:
2420                 return I915_TILING_X;
2421         case I915_FORMAT_MOD_Y_TILED:
2422         case I915_FORMAT_MOD_Y_TILED_CCS:
2423                 return I915_TILING_Y;
2424         default:
2425                 return I915_TILING_NONE;
2426         }
2427 }
2428
2429 /*
2430  * From the Sky Lake PRM:
2431  * "The Color Control Surface (CCS) contains the compression status of
2432  *  the cache-line pairs. The compression state of the cache-line pair
2433  *  is specified by 2 bits in the CCS. Each CCS cache-line represents
2434  *  an area on the main surface of 16 x16 sets of 128 byte Y-tiled
2435  *  cache-line-pairs. CCS is always Y tiled."
2436  *
2437  * Since cache line pairs refers to horizontally adjacent cache lines,
2438  * each cache line in the CCS corresponds to an area of 32x16 cache
2439  * lines on the main surface. Since each pixel is 4 bytes, this gives
2440  * us a ratio of one byte in the CCS for each 8x16 pixels in the
2441  * main surface.
2442  */
2443 static const struct drm_format_info ccs_formats[] = {
2444         { .format = DRM_FORMAT_XRGB8888, .depth = 24, .num_planes = 2, .cpp = { 4, 1, }, .hsub = 8, .vsub = 16, },
2445         { .format = DRM_FORMAT_XBGR8888, .depth = 24, .num_planes = 2, .cpp = { 4, 1, }, .hsub = 8, .vsub = 16, },
2446         { .format = DRM_FORMAT_ARGB8888, .depth = 32, .num_planes = 2, .cpp = { 4, 1, }, .hsub = 8, .vsub = 16, },
2447         { .format = DRM_FORMAT_ABGR8888, .depth = 32, .num_planes = 2, .cpp = { 4, 1, }, .hsub = 8, .vsub = 16, },
2448 };
2449
2450 static const struct drm_format_info *
2451 lookup_format_info(const struct drm_format_info formats[],
2452                    int num_formats, u32 format)
2453 {
2454         int i;
2455
2456         for (i = 0; i < num_formats; i++) {
2457                 if (formats[i].format == format)
2458                         return &formats[i];
2459         }
2460
2461         return NULL;
2462 }
2463
2464 static const struct drm_format_info *
2465 intel_get_format_info(const struct drm_mode_fb_cmd2 *cmd)
2466 {
2467         switch (cmd->modifier[0]) {
2468         case I915_FORMAT_MOD_Y_TILED_CCS:
2469         case I915_FORMAT_MOD_Yf_TILED_CCS:
2470                 return lookup_format_info(ccs_formats,
2471                                           ARRAY_SIZE(ccs_formats),
2472                                           cmd->pixel_format);
2473         default:
2474                 return NULL;
2475         }
2476 }
2477
2478 bool is_ccs_modifier(u64 modifier)
2479 {
2480         return modifier == I915_FORMAT_MOD_Y_TILED_CCS ||
2481                modifier == I915_FORMAT_MOD_Yf_TILED_CCS;
2482 }
2483
2484 static int
2485 intel_fill_fb_info(struct drm_i915_private *dev_priv,
2486                    struct drm_framebuffer *fb)
2487 {
2488         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
2489         struct intel_rotation_info *rot_info = &intel_fb->rot_info;
2490         struct drm_i915_gem_object *obj = intel_fb_obj(fb);
2491         u32 gtt_offset_rotated = 0;
2492         unsigned int max_size = 0;
2493         int i, num_planes = fb->format->num_planes;
2494         unsigned int tile_size = intel_tile_size(dev_priv);
2495
2496         for (i = 0; i < num_planes; i++) {
2497                 unsigned int width, height;
2498                 unsigned int cpp, size;
2499                 u32 offset;
2500                 int x, y;
2501                 int ret;
2502
2503                 cpp = fb->format->cpp[i];
2504                 width = drm_framebuffer_plane_width(fb->width, fb, i);
2505                 height = drm_framebuffer_plane_height(fb->height, fb, i);
2506
2507                 ret = intel_fb_offset_to_xy(&x, &y, fb, i);
2508                 if (ret) {
2509                         DRM_DEBUG_KMS("bad fb plane %d offset: 0x%x\n",
2510                                       i, fb->offsets[i]);
2511                         return ret;
2512                 }
2513
2514                 if (is_ccs_modifier(fb->modifier) && i == 1) {
2515                         int hsub = fb->format->hsub;
2516                         int vsub = fb->format->vsub;
2517                         int tile_width, tile_height;
2518                         int main_x, main_y;
2519                         int ccs_x, ccs_y;
2520
2521                         intel_tile_dims(fb, i, &tile_width, &tile_height);
2522                         tile_width *= hsub;
2523                         tile_height *= vsub;
2524
2525                         ccs_x = (x * hsub) % tile_width;
2526                         ccs_y = (y * vsub) % tile_height;
2527                         main_x = intel_fb->normal[0].x % tile_width;
2528                         main_y = intel_fb->normal[0].y % tile_height;
2529
2530                         /*
2531                          * CCS doesn't have its own x/y offset register, so the intra CCS tile
2532                          * x/y offsets must match between CCS and the main surface.
2533                          */
2534                         if (main_x != ccs_x || main_y != ccs_y) {
2535                                 DRM_DEBUG_KMS("Bad CCS x/y (main %d,%d ccs %d,%d) full (main %d,%d ccs %d,%d)\n",
2536                                               main_x, main_y,
2537                                               ccs_x, ccs_y,
2538                                               intel_fb->normal[0].x,
2539                                               intel_fb->normal[0].y,
2540                                               x, y);
2541                                 return -EINVAL;
2542                         }
2543                 }
2544
2545                 /*
2546                  * The fence (if used) is aligned to the start of the object
2547                  * so having the framebuffer wrap around across the edge of the
2548                  * fenced region doesn't really work. We have no API to configure
2549                  * the fence start offset within the object (nor could we probably
2550                  * on gen2/3). So it's just easier if we just require that the
2551                  * fb layout agrees with the fence layout. We already check that the
2552                  * fb stride matches the fence stride elsewhere.
2553                  */
2554                 if (i == 0 && i915_gem_object_is_tiled(obj) &&
2555                     (x + width) * cpp > fb->pitches[i]) {
2556                         DRM_DEBUG_KMS("bad fb plane %d offset: 0x%x\n",
2557                                       i, fb->offsets[i]);
2558                         return -EINVAL;
2559                 }
2560
2561                 /*
2562                  * First pixel of the framebuffer from
2563                  * the start of the normal gtt mapping.
2564                  */
2565                 intel_fb->normal[i].x = x;
2566                 intel_fb->normal[i].y = y;
2567
2568                 offset = _intel_compute_tile_offset(dev_priv, &x, &y,
2569                                                     fb, i, fb->pitches[i],
2570                                                     DRM_MODE_ROTATE_0, tile_size);
2571                 offset /= tile_size;
2572
2573                 if (fb->modifier != DRM_FORMAT_MOD_LINEAR) {
2574                         unsigned int tile_width, tile_height;
2575                         unsigned int pitch_tiles;
2576                         struct drm_rect r;
2577
2578                         intel_tile_dims(fb, i, &tile_width, &tile_height);
2579
2580                         rot_info->plane[i].offset = offset;
2581                         rot_info->plane[i].stride = DIV_ROUND_UP(fb->pitches[i], tile_width * cpp);
2582                         rot_info->plane[i].width = DIV_ROUND_UP(x + width, tile_width);
2583                         rot_info->plane[i].height = DIV_ROUND_UP(y + height, tile_height);
2584
2585                         intel_fb->rotated[i].pitch =
2586                                 rot_info->plane[i].height * tile_height;
2587
2588                         /* how many tiles does this plane need */
2589                         size = rot_info->plane[i].stride * rot_info->plane[i].height;
2590                         /*
2591                          * If the plane isn't horizontally tile aligned,
2592                          * we need one more tile.
2593                          */
2594                         if (x != 0)
2595                                 size++;
2596
2597                         /* rotate the x/y offsets to match the GTT view */
2598                         r.x1 = x;
2599                         r.y1 = y;
2600                         r.x2 = x + width;
2601                         r.y2 = y + height;
2602                         drm_rect_rotate(&r,
2603                                         rot_info->plane[i].width * tile_width,
2604                                         rot_info->plane[i].height * tile_height,
2605                                         DRM_MODE_ROTATE_270);
2606                         x = r.x1;
2607                         y = r.y1;
2608
2609                         /* rotate the tile dimensions to match the GTT view */
2610                         pitch_tiles = intel_fb->rotated[i].pitch / tile_height;
2611                         swap(tile_width, tile_height);
2612
2613                         /*
2614                          * We only keep the x/y offsets, so push all of the
2615                          * gtt offset into the x/y offsets.
2616                          */
2617                         __intel_adjust_tile_offset(&x, &y,
2618                                                    tile_width, tile_height,
2619                                                    tile_size, pitch_tiles,
2620                                                    gtt_offset_rotated * tile_size, 0);
2621
2622                         gtt_offset_rotated += rot_info->plane[i].width * rot_info->plane[i].height;
2623
2624                         /*
2625                          * First pixel of the framebuffer from
2626                          * the start of the rotated gtt mapping.
2627                          */
2628                         intel_fb->rotated[i].x = x;
2629                         intel_fb->rotated[i].y = y;
2630                 } else {
2631                         size = DIV_ROUND_UP((y + height) * fb->pitches[i] +
2632                                             x * cpp, tile_size);
2633                 }
2634
2635                 /* how many tiles in total needed in the bo */
2636                 max_size = max(max_size, offset + size);
2637         }
2638
2639         if (max_size * tile_size > obj->base.size) {
2640                 DRM_DEBUG_KMS("fb too big for bo (need %u bytes, have %zu bytes)\n",
2641                               max_size * tile_size, obj->base.size);
2642                 return -EINVAL;
2643         }
2644
2645         return 0;
2646 }
2647
2648 static int i9xx_format_to_fourcc(int format)
2649 {
2650         switch (format) {
2651         case DISPPLANE_8BPP:
2652                 return DRM_FORMAT_C8;
2653         case DISPPLANE_BGRX555:
2654                 return DRM_FORMAT_XRGB1555;
2655         case DISPPLANE_BGRX565:
2656                 return DRM_FORMAT_RGB565;
2657         default:
2658         case DISPPLANE_BGRX888:
2659                 return DRM_FORMAT_XRGB8888;
2660         case DISPPLANE_RGBX888:
2661                 return DRM_FORMAT_XBGR8888;
2662         case DISPPLANE_BGRX101010:
2663                 return DRM_FORMAT_XRGB2101010;
2664         case DISPPLANE_RGBX101010:
2665                 return DRM_FORMAT_XBGR2101010;
2666         }
2667 }
2668
2669 int skl_format_to_fourcc(int format, bool rgb_order, bool alpha)
2670 {
2671         switch (format) {
2672         case PLANE_CTL_FORMAT_RGB_565:
2673                 return DRM_FORMAT_RGB565;
2674         case PLANE_CTL_FORMAT_NV12:
2675                 return DRM_FORMAT_NV12;
2676         default:
2677         case PLANE_CTL_FORMAT_XRGB_8888:
2678                 if (rgb_order) {
2679                         if (alpha)
2680                                 return DRM_FORMAT_ABGR8888;
2681                         else
2682                                 return DRM_FORMAT_XBGR8888;
2683                 } else {
2684                         if (alpha)
2685                                 return DRM_FORMAT_ARGB8888;
2686                         else
2687                                 return DRM_FORMAT_XRGB8888;
2688                 }
2689         case PLANE_CTL_FORMAT_XRGB_2101010:
2690                 if (rgb_order)
2691                         return DRM_FORMAT_XBGR2101010;
2692                 else
2693                         return DRM_FORMAT_XRGB2101010;
2694         }
2695 }
2696
2697 static bool
2698 intel_alloc_initial_plane_obj(struct intel_crtc *crtc,
2699                               struct intel_initial_plane_config *plane_config)
2700 {
2701         struct drm_device *dev = crtc->base.dev;
2702         struct drm_i915_private *dev_priv = to_i915(dev);
2703         struct drm_i915_gem_object *obj = NULL;
2704         struct drm_mode_fb_cmd2 mode_cmd = { 0 };
2705         struct drm_framebuffer *fb = &plane_config->fb->base;
2706         u32 base_aligned = round_down(plane_config->base, PAGE_SIZE);
2707         u32 size_aligned = round_up(plane_config->base + plane_config->size,
2708                                     PAGE_SIZE);
2709
2710         size_aligned -= base_aligned;
2711
2712         if (plane_config->size == 0)
2713                 return false;
2714
2715         /* If the FB is too big, just don't use it since fbdev is not very
2716          * important and we should probably use that space with FBC or other
2717          * features. */
2718         if (size_aligned * 2 > dev_priv->stolen_usable_size)
2719                 return false;
2720
2721         mutex_lock(&dev->struct_mutex);
2722         obj = i915_gem_object_create_stolen_for_preallocated(dev_priv,
2723                                                              base_aligned,
2724                                                              base_aligned,
2725                                                              size_aligned);
2726         mutex_unlock(&dev->struct_mutex);
2727         if (!obj)
2728                 return false;
2729
2730         if (plane_config->tiling == I915_TILING_X)
2731                 obj->tiling_and_stride = fb->pitches[0] | I915_TILING_X;
2732
2733         mode_cmd.pixel_format = fb->format->format;
2734         mode_cmd.width = fb->width;
2735         mode_cmd.height = fb->height;
2736         mode_cmd.pitches[0] = fb->pitches[0];
2737         mode_cmd.modifier[0] = fb->modifier;
2738         mode_cmd.flags = DRM_MODE_FB_MODIFIERS;
2739
2740         if (intel_framebuffer_init(to_intel_framebuffer(fb), obj, &mode_cmd)) {
2741                 DRM_DEBUG_KMS("intel fb init failed\n");
2742                 goto out_unref_obj;
2743         }
2744
2745
2746         DRM_DEBUG_KMS("initial plane fb obj %p\n", obj);
2747         return true;
2748
2749 out_unref_obj:
2750         i915_gem_object_put(obj);
2751         return false;
2752 }
2753
2754 static void
2755 intel_set_plane_visible(struct intel_crtc_state *crtc_state,
2756                         struct intel_plane_state *plane_state,
2757                         bool visible)
2758 {
2759         struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
2760
2761         plane_state->base.visible = visible;
2762
2763         /* FIXME pre-g4x don't work like this */
2764         if (visible) {
2765                 crtc_state->base.plane_mask |= drm_plane_mask(&plane->base);
2766                 crtc_state->active_planes |= BIT(plane->id);
2767         } else {
2768                 crtc_state->base.plane_mask &= ~drm_plane_mask(&plane->base);
2769                 crtc_state->active_planes &= ~BIT(plane->id);
2770         }
2771
2772         DRM_DEBUG_KMS("%s active planes 0x%x\n",
2773                       crtc_state->base.crtc->name,
2774                       crtc_state->active_planes);
2775 }
2776
2777 static void intel_plane_disable_noatomic(struct intel_crtc *crtc,
2778                                          struct intel_plane *plane)
2779 {
2780         struct intel_crtc_state *crtc_state =
2781                 to_intel_crtc_state(crtc->base.state);
2782         struct intel_plane_state *plane_state =
2783                 to_intel_plane_state(plane->base.state);
2784
2785         intel_set_plane_visible(crtc_state, plane_state, false);
2786
2787         if (plane->id == PLANE_PRIMARY)
2788                 intel_pre_disable_primary_noatomic(&crtc->base);
2789
2790         trace_intel_disable_plane(&plane->base, crtc);
2791         plane->disable_plane(plane, crtc);
2792 }
2793
2794 static void
2795 intel_find_initial_plane_obj(struct intel_crtc *intel_crtc,
2796                              struct intel_initial_plane_config *plane_config)
2797 {
2798         struct drm_device *dev = intel_crtc->base.dev;
2799         struct drm_i915_private *dev_priv = to_i915(dev);
2800         struct drm_crtc *c;
2801         struct drm_i915_gem_object *obj;
2802         struct drm_plane *primary = intel_crtc->base.primary;
2803         struct drm_plane_state *plane_state = primary->state;
2804         struct drm_crtc_state *crtc_state = intel_crtc->base.state;
2805         struct intel_plane *intel_plane = to_intel_plane(primary);
2806         struct intel_plane_state *intel_state =
2807                 to_intel_plane_state(plane_state);
2808         struct drm_framebuffer *fb;
2809
2810         if (!plane_config->fb)
2811                 return;
2812
2813         if (intel_alloc_initial_plane_obj(intel_crtc, plane_config)) {
2814                 fb = &plane_config->fb->base;
2815                 goto valid_fb;
2816         }
2817
2818         kfree(plane_config->fb);
2819
2820         /*
2821          * Failed to alloc the obj, check to see if we should share
2822          * an fb with another CRTC instead
2823          */
2824         for_each_crtc(dev, c) {
2825                 struct intel_plane_state *state;
2826
2827                 if (c == &intel_crtc->base)
2828                         continue;
2829
2830                 if (!to_intel_crtc(c)->active)
2831                         continue;
2832
2833                 state = to_intel_plane_state(c->primary->state);
2834                 if (!state->vma)
2835                         continue;
2836
2837                 if (intel_plane_ggtt_offset(state) == plane_config->base) {
2838                         fb = state->base.fb;
2839                         drm_framebuffer_get(fb);
2840                         goto valid_fb;
2841                 }
2842         }
2843
2844         /*
2845          * We've failed to reconstruct the BIOS FB.  Current display state
2846          * indicates that the primary plane is visible, but has a NULL FB,
2847          * which will lead to problems later if we don't fix it up.  The
2848          * simplest solution is to just disable the primary plane now and
2849          * pretend the BIOS never had it enabled.
2850          */
2851         intel_plane_disable_noatomic(intel_crtc, intel_plane);
2852
2853         return;
2854
2855 valid_fb:
2856         mutex_lock(&dev->struct_mutex);
2857         intel_state->vma =
2858                 intel_pin_and_fence_fb_obj(fb,
2859                                            primary->state->rotation,
2860                                            intel_plane_uses_fence(intel_state),
2861                                            &intel_state->flags);
2862         mutex_unlock(&dev->struct_mutex);
2863         if (IS_ERR(intel_state->vma)) {
2864                 DRM_ERROR("failed to pin boot fb on pipe %d: %li\n",
2865                           intel_crtc->pipe, PTR_ERR(intel_state->vma));
2866
2867                 intel_state->vma = NULL;
2868                 drm_framebuffer_put(fb);
2869                 return;
2870         }
2871
2872         obj = intel_fb_obj(fb);
2873         intel_fb_obj_flush(obj, ORIGIN_DIRTYFB);
2874
2875         plane_state->src_x = 0;
2876         plane_state->src_y = 0;
2877         plane_state->src_w = fb->width << 16;
2878         plane_state->src_h = fb->height << 16;
2879
2880         plane_state->crtc_x = 0;
2881         plane_state->crtc_y = 0;
2882         plane_state->crtc_w = fb->width;
2883         plane_state->crtc_h = fb->height;
2884
2885         intel_state->base.src = drm_plane_state_src(plane_state);
2886         intel_state->base.dst = drm_plane_state_dest(plane_state);
2887
2888         if (i915_gem_object_is_tiled(obj))
2889                 dev_priv->preserve_bios_swizzle = true;
2890
2891         plane_state->fb = fb;
2892         plane_state->crtc = &intel_crtc->base;
2893
2894         intel_set_plane_visible(to_intel_crtc_state(crtc_state),
2895                                 to_intel_plane_state(plane_state),
2896                                 true);
2897
2898         atomic_or(to_intel_plane(primary)->frontbuffer_bit,
2899                   &obj->frontbuffer_bits);
2900 }
2901
2902 static int skl_max_plane_width(const struct drm_framebuffer *fb, int plane,
2903                                unsigned int rotation)
2904 {
2905         int cpp = fb->format->cpp[plane];
2906
2907         switch (fb->modifier) {
2908         case DRM_FORMAT_MOD_LINEAR:
2909         case I915_FORMAT_MOD_X_TILED:
2910                 switch (cpp) {
2911                 case 8:
2912                         return 4096;
2913                 case 4:
2914                 case 2:
2915                 case 1:
2916                         return 8192;
2917                 default:
2918                         MISSING_CASE(cpp);
2919                         break;
2920                 }
2921                 break;
2922         case I915_FORMAT_MOD_Y_TILED_CCS:
2923         case I915_FORMAT_MOD_Yf_TILED_CCS:
2924                 /* FIXME AUX plane? */
2925         case I915_FORMAT_MOD_Y_TILED:
2926         case I915_FORMAT_MOD_Yf_TILED:
2927                 switch (cpp) {
2928                 case 8:
2929                         return 2048;
2930                 case 4:
2931                         return 4096;
2932                 case 2:
2933                 case 1:
2934                         return 8192;
2935                 default:
2936                         MISSING_CASE(cpp);
2937                         break;
2938                 }
2939                 break;
2940         default:
2941                 MISSING_CASE(fb->modifier);
2942         }
2943
2944         return 2048;
2945 }
2946
2947 static bool skl_check_main_ccs_coordinates(struct intel_plane_state *plane_state,
2948                                            int main_x, int main_y, u32 main_offset)
2949 {
2950         const struct drm_framebuffer *fb = plane_state->base.fb;
2951         int hsub = fb->format->hsub;
2952         int vsub = fb->format->vsub;
2953         int aux_x = plane_state->aux.x;
2954         int aux_y = plane_state->aux.y;
2955         u32 aux_offset = plane_state->aux.offset;
2956         u32 alignment = intel_surf_alignment(fb, 1);
2957
2958         while (aux_offset >= main_offset && aux_y <= main_y) {
2959                 int x, y;
2960
2961                 if (aux_x == main_x && aux_y == main_y)
2962                         break;
2963
2964                 if (aux_offset == 0)
2965                         break;
2966
2967                 x = aux_x / hsub;
2968                 y = aux_y / vsub;
2969                 aux_offset = intel_adjust_tile_offset(&x, &y, plane_state, 1,
2970                                                       aux_offset, aux_offset - alignment);
2971                 aux_x = x * hsub + aux_x % hsub;
2972                 aux_y = y * vsub + aux_y % vsub;
2973         }
2974
2975         if (aux_x != main_x || aux_y != main_y)
2976                 return false;
2977
2978         plane_state->aux.offset = aux_offset;
2979         plane_state->aux.x = aux_x;
2980         plane_state->aux.y = aux_y;
2981
2982         return true;
2983 }
2984
2985 static int skl_check_main_surface(const struct intel_crtc_state *crtc_state,
2986                                   struct intel_plane_state *plane_state)
2987 {
2988         struct drm_i915_private *dev_priv =
2989                 to_i915(plane_state->base.plane->dev);
2990         const struct drm_framebuffer *fb = plane_state->base.fb;
2991         unsigned int rotation = plane_state->base.rotation;
2992         int x = plane_state->base.src.x1 >> 16;
2993         int y = plane_state->base.src.y1 >> 16;
2994         int w = drm_rect_width(&plane_state->base.src) >> 16;
2995         int h = drm_rect_height(&plane_state->base.src) >> 16;
2996         int dst_x = plane_state->base.dst.x1;
2997         int dst_w = drm_rect_width(&plane_state->base.dst);
2998         int pipe_src_w = crtc_state->pipe_src_w;
2999         int max_width = skl_max_plane_width(fb, 0, rotation);
3000         int max_height = 4096;
3001         u32 alignment, offset, aux_offset = plane_state->aux.offset;
3002
3003         if (w > max_width || h > max_height) {
3004                 DRM_DEBUG_KMS("requested Y/RGB source size %dx%d too big (limit %dx%d)\n",
3005                               w, h, max_width, max_height);
3006                 return -EINVAL;
3007         }
3008
3009         /*
3010          * Display WA #1175: cnl,glk
3011          * Planes other than the cursor may cause FIFO underflow and display
3012          * corruption if starting less than 4 pixels from the right edge of
3013          * the screen.
3014          * Besides the above WA fix the similar problem, where planes other
3015          * than the cursor ending less than 4 pixels from the left edge of the
3016          * screen may cause FIFO underflow and display corruption.
3017          */
3018         if ((IS_GEMINILAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) &&
3019             (dst_x + dst_w < 4 || dst_x > pipe_src_w - 4)) {
3020                 DRM_DEBUG_KMS("requested plane X %s position %d invalid (valid range %d-%d)\n",
3021                               dst_x + dst_w < 4 ? "end" : "start",
3022                               dst_x + dst_w < 4 ? dst_x + dst_w : dst_x,
3023                               4, pipe_src_w - 4);
3024                 return -ERANGE;
3025         }
3026
3027         intel_add_fb_offsets(&x, &y, plane_state, 0);
3028         offset = intel_compute_tile_offset(&x, &y, plane_state, 0);
3029         alignment = intel_surf_alignment(fb, 0);
3030
3031         /*
3032          * AUX surface offset is specified as the distance from the
3033          * main surface offset, and it must be non-negative. Make
3034          * sure that is what we will get.
3035          */
3036         if (offset > aux_offset)
3037                 offset = intel_adjust_tile_offset(&x, &y, plane_state, 0,
3038                                                   offset, aux_offset & ~(alignment - 1));
3039
3040         /*
3041          * When using an X-tiled surface, the plane blows up
3042          * if the x offset + width exceed the stride.
3043          *
3044          * TODO: linear and Y-tiled seem fine, Yf untested,
3045          */
3046         if (fb->modifier == I915_FORMAT_MOD_X_TILED) {
3047                 int cpp = fb->format->cpp[0];
3048
3049                 while ((x + w) * cpp > fb->pitches[0]) {
3050                         if (offset == 0) {
3051                                 DRM_DEBUG_KMS("Unable to find suitable display surface offset due to X-tiling\n");
3052                                 return -EINVAL;
3053                         }
3054
3055                         offset = intel_adjust_tile_offset(&x, &y, plane_state, 0,
3056                                                           offset, offset - alignment);
3057                 }
3058         }
3059
3060         /*
3061          * CCS AUX surface doesn't have its own x/y offsets, we must make sure
3062          * they match with the main surface x/y offsets.
3063          */
3064         if (is_ccs_modifier(fb->modifier)) {
3065                 while (!skl_check_main_ccs_coordinates(plane_state, x, y, offset)) {
3066                         if (offset == 0)
3067                                 break;
3068
3069                         offset = intel_adjust_tile_offset(&x, &y, plane_state, 0,
3070                                                           offset, offset - alignment);
3071                 }
3072
3073                 if (x != plane_state->aux.x || y != plane_state->aux.y) {
3074                         DRM_DEBUG_KMS("Unable to find suitable display surface offset due to CCS\n");
3075                         return -EINVAL;
3076                 }
3077         }
3078
3079         plane_state->main.offset = offset;
3080         plane_state->main.x = x;
3081         plane_state->main.y = y;
3082
3083         return 0;
3084 }
3085
3086 static int
3087 skl_check_nv12_surface(const struct intel_crtc_state *crtc_state,
3088                        struct intel_plane_state *plane_state)
3089 {
3090         /* Display WA #1106 */
3091         if (plane_state->base.rotation !=
3092             (DRM_MODE_REFLECT_X | DRM_MODE_ROTATE_90) &&
3093             plane_state->base.rotation != DRM_MODE_ROTATE_270)
3094                 return 0;
3095
3096         /*
3097          * src coordinates are rotated here.
3098          * We check height but report it as width
3099          */
3100         if (((drm_rect_height(&plane_state->base.src) >> 16) % 4) != 0) {
3101                 DRM_DEBUG_KMS("src width must be multiple "
3102                               "of 4 for rotated NV12\n");
3103                 return -EINVAL;
3104         }
3105
3106         return 0;
3107 }
3108
3109 static int skl_check_nv12_aux_surface(struct intel_plane_state *plane_state)
3110 {
3111         const struct drm_framebuffer *fb = plane_state->base.fb;
3112         unsigned int rotation = plane_state->base.rotation;
3113         int max_width = skl_max_plane_width(fb, 1, rotation);
3114         int max_height = 4096;
3115         int x = plane_state->base.src.x1 >> 17;
3116         int y = plane_state->base.src.y1 >> 17;
3117         int w = drm_rect_width(&plane_state->base.src) >> 17;
3118         int h = drm_rect_height(&plane_state->base.src) >> 17;
3119         u32 offset;
3120
3121         intel_add_fb_offsets(&x, &y, plane_state, 1);
3122         offset = intel_compute_tile_offset(&x, &y, plane_state, 1);
3123
3124         /* FIXME not quite sure how/if these apply to the chroma plane */
3125         if (w > max_width || h > max_height) {
3126                 DRM_DEBUG_KMS("CbCr source size %dx%d too big (limit %dx%d)\n",
3127                               w, h, max_width, max_height);
3128                 return -EINVAL;
3129         }
3130
3131         plane_state->aux.offset = offset;
3132         plane_state->aux.x = x;
3133         plane_state->aux.y = y;
3134
3135         return 0;
3136 }
3137
3138 static int skl_check_ccs_aux_surface(struct intel_plane_state *plane_state)
3139 {
3140         const struct drm_framebuffer *fb = plane_state->base.fb;
3141         int src_x = plane_state->base.src.x1 >> 16;
3142         int src_y = plane_state->base.src.y1 >> 16;
3143         int hsub = fb->format->hsub;
3144         int vsub = fb->format->vsub;
3145         int x = src_x / hsub;
3146         int y = src_y / vsub;
3147         u32 offset;
3148
3149         if (plane_state->base.rotation & ~(DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_180)) {
3150                 DRM_DEBUG_KMS("RC support only with 0/180 degree rotation %x\n",
3151                               plane_state->base.rotation);
3152                 return -EINVAL;
3153         }
3154
3155         intel_add_fb_offsets(&x, &y, plane_state, 1);
3156         offset = intel_compute_tile_offset(&x, &y, plane_state, 1);
3157
3158         plane_state->aux.offset = offset;
3159         plane_state->aux.x = x * hsub + src_x % hsub;
3160         plane_state->aux.y = y * vsub + src_y % vsub;
3161
3162         return 0;
3163 }
3164
3165 int skl_check_plane_surface(const struct intel_crtc_state *crtc_state,
3166                             struct intel_plane_state *plane_state)
3167 {
3168         const struct drm_framebuffer *fb = plane_state->base.fb;
3169         unsigned int rotation = plane_state->base.rotation;
3170         int ret;
3171
3172         if (rotation & DRM_MODE_REFLECT_X &&
3173             fb->modifier == DRM_FORMAT_MOD_LINEAR) {
3174                 DRM_DEBUG_KMS("horizontal flip is not supported with linear surface formats\n");