drivers/gpu/drm/i915/display/intel_display_power.c

   1 /* SPDX-License-Identifier: MIT */
   2 /*
   3  * Copyright © 2019 Intel Corporation
   4  */
   5
   6 #include <linux/string_helpers.h>
   7
   8 #include "i915_drv.h"
   9 #include "i915_irq.h"
  10 #include "i915_reg.h"
  11 #include "intel_backlight_regs.h"
  12 #include "intel_cdclk.h"
  13 #include "intel_clock_gating.h"
  14 #include "intel_combo_phy.h"
  15 #include "intel_de.h"
  16 #include "intel_display_power.h"
  17 #include "intel_display_power_map.h"
  18 #include "intel_display_power_well.h"
  19 #include "intel_display_types.h"
  20 #include "intel_dmc.h"
  21 #include "intel_mchbar_regs.h"
  22 #include "intel_pch_refclk.h"
  23 #include "intel_pcode.h"
  24 #include "intel_pmdemand.h"
  25 #include "intel_pps_regs.h"
  26 #include "intel_snps_phy.h"
  27 #include "skl_watermark.h"
  28 #include "skl_watermark_regs.h"
  29 #include "vlv_sideband.h"
  30
  31 #define for_each_power_domain_well(__dev_priv, __power_well, __domain)  \
  32         for_each_power_well(__dev_priv, __power_well)                           \
  33                 for_each_if(test_bit((__domain), (__power_well)->domains.bits))
  34
  35 #define for_each_power_domain_well_reverse(__dev_priv, __power_well, __domain) \
  36         for_each_power_well_reverse(__dev_priv, __power_well)                   \
  37                 for_each_if(test_bit((__domain), (__power_well)->domains.bits))
  38
  39 const char *
  40 intel_display_power_domain_str(enum intel_display_power_domain domain)
  41 {
  42         switch (domain) {
  43         case POWER_DOMAIN_DISPLAY_CORE:
  44                 return "DISPLAY_CORE";
  45         case POWER_DOMAIN_PIPE_A:
  46                 return "PIPE_A";
  47         case POWER_DOMAIN_PIPE_B:
  48                 return "PIPE_B";
  49         case POWER_DOMAIN_PIPE_C:
  50                 return "PIPE_C";
  51         case POWER_DOMAIN_PIPE_D:
  52                 return "PIPE_D";
  53         case POWER_DOMAIN_PIPE_PANEL_FITTER_A:
  54                 return "PIPE_PANEL_FITTER_A";
  55         case POWER_DOMAIN_PIPE_PANEL_FITTER_B:
  56                 return "PIPE_PANEL_FITTER_B";
  57         case POWER_DOMAIN_PIPE_PANEL_FITTER_C:
  58                 return "PIPE_PANEL_FITTER_C";
  59         case POWER_DOMAIN_PIPE_PANEL_FITTER_D:
  60                 return "PIPE_PANEL_FITTER_D";
  61         case POWER_DOMAIN_TRANSCODER_A:
  62                 return "TRANSCODER_A";
  63         case POWER_DOMAIN_TRANSCODER_B:
  64                 return "TRANSCODER_B";
  65         case POWER_DOMAIN_TRANSCODER_C:
  66                 return "TRANSCODER_C";
  67         case POWER_DOMAIN_TRANSCODER_D:
  68                 return "TRANSCODER_D";
  69         case POWER_DOMAIN_TRANSCODER_EDP:
  70                 return "TRANSCODER_EDP";
  71         case POWER_DOMAIN_TRANSCODER_DSI_A:
  72                 return "TRANSCODER_DSI_A";
  73         case POWER_DOMAIN_TRANSCODER_DSI_C:
  74                 return "TRANSCODER_DSI_C";
  75         case POWER_DOMAIN_TRANSCODER_VDSC_PW2:
  76                 return "TRANSCODER_VDSC_PW2";
  77         case POWER_DOMAIN_PORT_DDI_LANES_A:
  78                 return "PORT_DDI_LANES_A";
  79         case POWER_DOMAIN_PORT_DDI_LANES_B:
  80                 return "PORT_DDI_LANES_B";
  81         case POWER_DOMAIN_PORT_DDI_LANES_C:
  82                 return "PORT_DDI_LANES_C";
  83         case POWER_DOMAIN_PORT_DDI_LANES_D:
  84                 return "PORT_DDI_LANES_D";
  85         case POWER_DOMAIN_PORT_DDI_LANES_E:
  86                 return "PORT_DDI_LANES_E";
  87         case POWER_DOMAIN_PORT_DDI_LANES_F:
  88                 return "PORT_DDI_LANES_F";
  89         case POWER_DOMAIN_PORT_DDI_LANES_TC1:
  90                 return "PORT_DDI_LANES_TC1";
  91         case POWER_DOMAIN_PORT_DDI_LANES_TC2:
  92                 return "PORT_DDI_LANES_TC2";
  93         case POWER_DOMAIN_PORT_DDI_LANES_TC3:
  94                 return "PORT_DDI_LANES_TC3";
  95         case POWER_DOMAIN_PORT_DDI_LANES_TC4:
  96                 return "PORT_DDI_LANES_TC4";
  97         case POWER_DOMAIN_PORT_DDI_LANES_TC5:
  98                 return "PORT_DDI_LANES_TC5";
  99         case POWER_DOMAIN_PORT_DDI_LANES_TC6:
 100                 return "PORT_DDI_LANES_TC6";
 101         case POWER_DOMAIN_PORT_DDI_IO_A:
 102                 return "PORT_DDI_IO_A";
 103         case POWER_DOMAIN_PORT_DDI_IO_B:
 104                 return "PORT_DDI_IO_B";
 105         case POWER_DOMAIN_PORT_DDI_IO_C:
 106                 return "PORT_DDI_IO_C";
 107         case POWER_DOMAIN_PORT_DDI_IO_D:
 108                 return "PORT_DDI_IO_D";
 109         case POWER_DOMAIN_PORT_DDI_IO_E:
 110                 return "PORT_DDI_IO_E";
 111         case POWER_DOMAIN_PORT_DDI_IO_F:
 112                 return "PORT_DDI_IO_F";
 113         case POWER_DOMAIN_PORT_DDI_IO_TC1:
 114                 return "PORT_DDI_IO_TC1";
 115         case POWER_DOMAIN_PORT_DDI_IO_TC2:
 116                 return "PORT_DDI_IO_TC2";
 117         case POWER_DOMAIN_PORT_DDI_IO_TC3:
 118                 return "PORT_DDI_IO_TC3";
 119         case POWER_DOMAIN_PORT_DDI_IO_TC4:
 120                 return "PORT_DDI_IO_TC4";
 121         case POWER_DOMAIN_PORT_DDI_IO_TC5:
 122                 return "PORT_DDI_IO_TC5";
 123         case POWER_DOMAIN_PORT_DDI_IO_TC6:
 124                 return "PORT_DDI_IO_TC6";
 125         case POWER_DOMAIN_PORT_DSI:
 126                 return "PORT_DSI";
 127         case POWER_DOMAIN_PORT_CRT:
 128                 return "PORT_CRT";
 129         case POWER_DOMAIN_PORT_OTHER:
 130                 return "PORT_OTHER";
 131         case POWER_DOMAIN_VGA:
 132                 return "VGA";
 133         case POWER_DOMAIN_AUDIO_MMIO:
 134                 return "AUDIO_MMIO";
 135         case POWER_DOMAIN_AUDIO_PLAYBACK:
 136                 return "AUDIO_PLAYBACK";
 137         case POWER_DOMAIN_AUX_IO_A:
 138                 return "AUX_IO_A";
 139         case POWER_DOMAIN_AUX_IO_B:
 140                 return "AUX_IO_B";
 141         case POWER_DOMAIN_AUX_IO_C:
 142                 return "AUX_IO_C";
 143         case POWER_DOMAIN_AUX_IO_D:
 144                 return "AUX_IO_D";
 145         case POWER_DOMAIN_AUX_IO_E:
 146                 return "AUX_IO_E";
 147         case POWER_DOMAIN_AUX_IO_F:
 148                 return "AUX_IO_F";
 149         case POWER_DOMAIN_AUX_A:
 150                 return "AUX_A";
 151         case POWER_DOMAIN_AUX_B:
 152                 return "AUX_B";
 153         case POWER_DOMAIN_AUX_C:
 154                 return "AUX_C";
 155         case POWER_DOMAIN_AUX_D:
 156                 return "AUX_D";
 157         case POWER_DOMAIN_AUX_E:
 158                 return "AUX_E";
 159         case POWER_DOMAIN_AUX_F:
 160                 return "AUX_F";
 161         case POWER_DOMAIN_AUX_USBC1:
 162                 return "AUX_USBC1";
 163         case POWER_DOMAIN_AUX_USBC2:
 164                 return "AUX_USBC2";
 165         case POWER_DOMAIN_AUX_USBC3:
 166                 return "AUX_USBC3";
 167         case POWER_DOMAIN_AUX_USBC4:
 168                 return "AUX_USBC4";
 169         case POWER_DOMAIN_AUX_USBC5:
 170                 return "AUX_USBC5";
 171         case POWER_DOMAIN_AUX_USBC6:
 172                 return "AUX_USBC6";
 173         case POWER_DOMAIN_AUX_TBT1:
 174                 return "AUX_TBT1";
 175         case POWER_DOMAIN_AUX_TBT2:
 176                 return "AUX_TBT2";
 177         case POWER_DOMAIN_AUX_TBT3:
 178                 return "AUX_TBT3";
 179         case POWER_DOMAIN_AUX_TBT4:
 180                 return "AUX_TBT4";
 181         case POWER_DOMAIN_AUX_TBT5:
 182                 return "AUX_TBT5";
 183         case POWER_DOMAIN_AUX_TBT6:
 184                 return "AUX_TBT6";
 185         case POWER_DOMAIN_GMBUS:
 186                 return "GMBUS";
 187         case POWER_DOMAIN_INIT:
 188                 return "INIT";
 189         case POWER_DOMAIN_GT_IRQ:
 190                 return "GT_IRQ";
 191         case POWER_DOMAIN_DC_OFF:
 192                 return "DC_OFF";
 193         case POWER_DOMAIN_TC_COLD_OFF:
 194                 return "TC_COLD_OFF";
 195         default:
 196                 MISSING_CASE(domain);
 197                 return "?";
 198         }
 199 }
 200
 201 /**
 202  * __intel_display_power_is_enabled - unlocked check for a power domain
 203  * @dev_priv: i915 device instance
 204  * @domain: power domain to check
 205  *
 206  * This is the unlocked version of intel_display_power_is_enabled() and should
 207  * only be used from error capture and recovery code where deadlocks are
 208  * possible.
 209  *
 210  * Returns:
 211  * True when the power domain is enabled, false otherwise.
 212  */
 213 bool __intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
 214                                       enum intel_display_power_domain domain)
 215 {
 216         struct i915_power_well *power_well;
 217         bool is_enabled;
 218
 219         if (pm_runtime_suspended(dev_priv->drm.dev))
 220                 return false;
 221
 222         is_enabled = true;
 223
 224         for_each_power_domain_well_reverse(dev_priv, power_well, domain) {
 225                 if (intel_power_well_is_always_on(power_well))
 226                         continue;
 227
 228                 if (!intel_power_well_is_enabled_cached(power_well)) {
 229                         is_enabled = false;
 230                         break;
 231                 }
 232         }
 233
 234         return is_enabled;
 235 }
 236
 237 /**
 238  * intel_display_power_is_enabled - check for a power domain
 239  * @dev_priv: i915 device instance
 240  * @domain: power domain to check
 241  *
 242  * This function can be used to check the hw power domain state. It is mostly
 243  * used in hardware state readout functions. Everywhere else code should rely
 244  * upon explicit power domain reference counting to ensure that the hardware
 245  * block is powered up before accessing it.
 246  *
 247  * Callers must hold the relevant modesetting locks to ensure that concurrent
 248  * threads can't disable the power well while the caller tries to read a few
 249  * registers.
 250  *
 251  * Returns:
 252  * True when the power domain is enabled, false otherwise.
 253  */
 254 bool intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
 255                                     enum intel_display_power_domain domain)
 256 {
 257         struct i915_power_domains *power_domains;
 258         bool ret;
 259
 260         power_domains = &dev_priv->display.power.domains;
 261
 262         mutex_lock(&power_domains->lock);
 263         ret = __intel_display_power_is_enabled(dev_priv, domain);
 264         mutex_unlock(&power_domains->lock);
 265
 266         return ret;
 267 }
 268
 269 static u32
 270 sanitize_target_dc_state(struct drm_i915_private *i915,
 271                          u32 target_dc_state)
 272 {
 273         struct i915_power_domains *power_domains = &i915->display.power.domains;
 274         static const u32 states[] = {
 275                 DC_STATE_EN_UPTO_DC6,
 276                 DC_STATE_EN_UPTO_DC5,
 277                 DC_STATE_EN_DC3CO,
 278                 DC_STATE_DISABLE,
 279         };
 280         int i;
 281
 282         for (i = 0; i < ARRAY_SIZE(states) - 1; i++) {
 283                 if (target_dc_state != states[i])
 284                         continue;
 285
 286                 if (power_domains->allowed_dc_mask & target_dc_state)
 287                         break;
 288
 289                 target_dc_state = states[i + 1];
 290         }
 291
 292         return target_dc_state;
 293 }
 294
 295 /**
 296  * intel_display_power_set_target_dc_state - Set target dc state.
 297  * @dev_priv: i915 device
 298  * @state: state which needs to be set as target_dc_state.
 299  *
 300  * This function set the "DC off" power well target_dc_state,
 301  * based upon this target_dc_stste, "DC off" power well will
 302  * enable desired DC state.
 303  */
 304 void intel_display_power_set_target_dc_state(struct drm_i915_private *dev_priv,
 305                                              u32 state)
 306 {
 307         struct i915_power_well *power_well;
 308         bool dc_off_enabled;
 309         struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
 310
 311         mutex_lock(&power_domains->lock);
 312         power_well = lookup_power_well(dev_priv, SKL_DISP_DC_OFF);
 313
 314         if (drm_WARN_ON(&dev_priv->drm, !power_well))
 315                 goto unlock;
 316
 317         state = sanitize_target_dc_state(dev_priv, state);
 318
 319         if (state == power_domains->target_dc_state)
 320                 goto unlock;
 321
 322         dc_off_enabled = intel_power_well_is_enabled(dev_priv, power_well);
 323         /*
 324          * If DC off power well is disabled, need to enable and disable the
 325          * DC off power well to effect target DC state.
 326          */
 327         if (!dc_off_enabled)
 328                 intel_power_well_enable(dev_priv, power_well);
 329
 330         power_domains->target_dc_state = state;
 331
 332         if (!dc_off_enabled)
 333                 intel_power_well_disable(dev_priv, power_well);
 334
 335 unlock:
 336         mutex_unlock(&power_domains->lock);
 337 }
 338
 339 static void __async_put_domains_mask(struct i915_power_domains *power_domains,
 340                                      struct intel_power_domain_mask *mask)
 341 {
 342         bitmap_or(mask->bits,
 343                   power_domains->async_put_domains[0].bits,
 344                   power_domains->async_put_domains[1].bits,
 345                   POWER_DOMAIN_NUM);
 346 }
 347
 348 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
 349
 350 static bool
 351 assert_async_put_domain_masks_disjoint(struct i915_power_domains *power_domains)
 352 {
 353         struct drm_i915_private *i915 = container_of(power_domains,
 354                                                      struct drm_i915_private,
 355                                                      display.power.domains);
 356
 357         return !drm_WARN_ON(&i915->drm,
 358                             bitmap_intersects(power_domains->async_put_domains[0].bits,
 359                                               power_domains->async_put_domains[1].bits,
 360                                               POWER_DOMAIN_NUM));
 361 }
 362
 363 static bool
 364 __async_put_domains_state_ok(struct i915_power_domains *power_domains)
 365 {
 366         struct drm_i915_private *i915 = container_of(power_domains,
 367                                                      struct drm_i915_private,
 368                                                      display.power.domains);
 369         struct intel_power_domain_mask async_put_mask;
 370         enum intel_display_power_domain domain;
 371         bool err = false;
 372
 373         err |= !assert_async_put_domain_masks_disjoint(power_domains);
 374         __async_put_domains_mask(power_domains, &async_put_mask);
 375         err |= drm_WARN_ON(&i915->drm,
 376                            !!power_domains->async_put_wakeref !=
 377                            !bitmap_empty(async_put_mask.bits, POWER_DOMAIN_NUM));
 378
 379         for_each_power_domain(domain, &async_put_mask)
 380                 err |= drm_WARN_ON(&i915->drm,
 381                                    power_domains->domain_use_count[domain] != 1);
 382
 383         return !err;
 384 }
 385
 386 static void print_power_domains(struct i915_power_domains *power_domains,
 387                                 const char *prefix, struct intel_power_domain_mask *mask)
 388 {
 389         struct drm_i915_private *i915 = container_of(power_domains,
 390                                                      struct drm_i915_private,
 391                                                      display.power.domains);
 392         enum intel_display_power_domain domain;
 393
 394         drm_dbg(&i915->drm, "%s (%d):\n", prefix, bitmap_weight(mask->bits, POWER_DOMAIN_NUM));
 395         for_each_power_domain(domain, mask)
 396                 drm_dbg(&i915->drm, "%s use_count %d\n",
 397                         intel_display_power_domain_str(domain),
 398                         power_domains->domain_use_count[domain]);
 399 }
 400
 401 static void
 402 print_async_put_domains_state(struct i915_power_domains *power_domains)
 403 {
 404         struct drm_i915_private *i915 = container_of(power_domains,
 405                                                      struct drm_i915_private,
 406                                                      display.power.domains);
 407
 408         drm_dbg(&i915->drm, "async_put_wakeref: %s\n",
 409                 str_yes_no(power_domains->async_put_wakeref));
 410
 411         print_power_domains(power_domains, "async_put_domains[0]",
 412                             &power_domains->async_put_domains[0]);
 413         print_power_domains(power_domains, "async_put_domains[1]",
 414                             &power_domains->async_put_domains[1]);
 415 }
 416
 417 static void
 418 verify_async_put_domains_state(struct i915_power_domains *power_domains)
 419 {
 420         if (!__async_put_domains_state_ok(power_domains))
 421                 print_async_put_domains_state(power_domains);
 422 }
 423
 424 #else
 425
 426 static void
 427 assert_async_put_domain_masks_disjoint(struct i915_power_domains *power_domains)
 428 {
 429 }
 430
 431 static void
 432 verify_async_put_domains_state(struct i915_power_domains *power_domains)
 433 {
 434 }
 435
 436 #endif /* CONFIG_DRM_I915_DEBUG_RUNTIME_PM */
 437
 438 static void async_put_domains_mask(struct i915_power_domains *power_domains,
 439                                    struct intel_power_domain_mask *mask)
 440
 441 {
 442         assert_async_put_domain_masks_disjoint(power_domains);
 443
 444         __async_put_domains_mask(power_domains, mask);
 445 }
 446
 447 static void
 448 async_put_domains_clear_domain(struct i915_power_domains *power_domains,
 449                                enum intel_display_power_domain domain)
 450 {
 451         assert_async_put_domain_masks_disjoint(power_domains);
 452
 453         clear_bit(domain, power_domains->async_put_domains[0].bits);
 454         clear_bit(domain, power_domains->async_put_domains[1].bits);
 455 }
 456
 457 static void
 458 cancel_async_put_work(struct i915_power_domains *power_domains, bool sync)
 459 {
 460         if (sync)
 461                 cancel_delayed_work_sync(&power_domains->async_put_work);
 462         else
 463                 cancel_delayed_work(&power_domains->async_put_work);
 464
 465         power_domains->async_put_next_delay = 0;
 466 }
 467
 468 static bool
 469 intel_display_power_grab_async_put_ref(struct drm_i915_private *dev_priv,
 470                                        enum intel_display_power_domain domain)
 471 {
 472         struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
 473         struct intel_power_domain_mask async_put_mask;
 474         bool ret = false;
 475
 476         async_put_domains_mask(power_domains, &async_put_mask);
 477         if (!test_bit(domain, async_put_mask.bits))
 478                 goto out_verify;
 479
 480         async_put_domains_clear_domain(power_domains, domain);
 481
 482         ret = true;
 483
 484         async_put_domains_mask(power_domains, &async_put_mask);
 485         if (!bitmap_empty(async_put_mask.bits, POWER_DOMAIN_NUM))
 486                 goto out_verify;
 487
 488         cancel_async_put_work(power_domains, false);
 489         intel_runtime_pm_put_raw(&dev_priv->runtime_pm,
 490                                  fetch_and_zero(&power_domains->async_put_wakeref));
 491 out_verify:
 492         verify_async_put_domains_state(power_domains);
 493
 494         return ret;
 495 }
 496
 497 static void
 498 __intel_display_power_get_domain(struct drm_i915_private *dev_priv,
 499                                  enum intel_display_power_domain domain)
 500 {
 501         struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
 502         struct i915_power_well *power_well;
 503
 504         if (intel_display_power_grab_async_put_ref(dev_priv, domain))
 505                 return;
 506
 507         for_each_power_domain_well(dev_priv, power_well, domain)
 508                 intel_power_well_get(dev_priv, power_well);
 509
 510         power_domains->domain_use_count[domain]++;
 511 }
 512
 513 /**
 514  * intel_display_power_get - grab a power domain reference
 515  * @dev_priv: i915 device instance
 516  * @domain: power domain to reference
 517  *
 518  * This function grabs a power domain reference for @domain and ensures that the
 519  * power domain and all its parents are powered up. Therefore users should only
 520  * grab a reference to the innermost power domain they need.
 521  *
 522  * Any power domain reference obtained by this function must have a symmetric
 523  * call to intel_display_power_put() to release the reference again.
 524  */
 525 intel_wakeref_t intel_display_power_get(struct drm_i915_private *dev_priv,
 526                                         enum intel_display_power_domain domain)
 527 {
 528         struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
 529         intel_wakeref_t wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
 530
 531         mutex_lock(&power_domains->lock);
 532         __intel_display_power_get_domain(dev_priv, domain);
 533         mutex_unlock(&power_domains->lock);
 534
 535         return wakeref;
 536 }
 537
 538 /**
 539  * intel_display_power_get_if_enabled - grab a reference for an enabled display power domain
 540  * @dev_priv: i915 device instance
 541  * @domain: power domain to reference
 542  *
 543  * This function grabs a power domain reference for @domain and ensures that the
 544  * power domain and all its parents are powered up. Therefore users should only
 545  * grab a reference to the innermost power domain they need.
 546  *
 547  * Any power domain reference obtained by this function must have a symmetric
 548  * call to intel_display_power_put() to release the reference again.
 549  */
 550 intel_wakeref_t
 551 intel_display_power_get_if_enabled(struct drm_i915_private *dev_priv,
 552                                    enum intel_display_power_domain domain)
 553 {
 554         struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
 555         intel_wakeref_t wakeref;
 556         bool is_enabled;
 557
 558         wakeref = intel_runtime_pm_get_if_in_use(&dev_priv->runtime_pm);
 559         if (!wakeref)
 560                 return false;
 561
 562         mutex_lock(&power_domains->lock);
 563
 564         if (__intel_display_power_is_enabled(dev_priv, domain)) {
 565                 __intel_display_power_get_domain(dev_priv, domain);
 566                 is_enabled = true;
 567         } else {
 568                 is_enabled = false;
 569         }
 570
 571         mutex_unlock(&power_domains->lock);
 572
 573         if (!is_enabled) {
 574                 intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
 575                 wakeref = 0;
 576         }
 577
 578         return wakeref;
 579 }
 580
 581 static void
 582 __intel_display_power_put_domain(struct drm_i915_private *dev_priv,
 583                                  enum intel_display_power_domain domain)
 584 {
 585         struct i915_power_domains *power_domains;
 586         struct i915_power_well *power_well;
 587         const char *name = intel_display_power_domain_str(domain);
 588         struct intel_power_domain_mask async_put_mask;
 589
 590         power_domains = &dev_priv->display.power.domains;
 591
 592         drm_WARN(&dev_priv->drm, !power_domains->domain_use_count[domain],
 593                  "Use count on domain %s is already zero\n",
 594                  name);
 595         async_put_domains_mask(power_domains, &async_put_mask);
 596         drm_WARN(&dev_priv->drm,
 597                  test_bit(domain, async_put_mask.bits),
 598                  "Async disabling of domain %s is pending\n",
 599                  name);
 600
 601         power_domains->domain_use_count[domain]--;
 602
 603         for_each_power_domain_well_reverse(dev_priv, power_well, domain)
 604                 intel_power_well_put(dev_priv, power_well);
 605 }
 606
 607 static void __intel_display_power_put(struct drm_i915_private *dev_priv,
 608                                       enum intel_display_power_domain domain)
 609 {
 610         struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
 611
 612         mutex_lock(&power_domains->lock);
 613         __intel_display_power_put_domain(dev_priv, domain);
 614         mutex_unlock(&power_domains->lock);
 615 }
 616
 617 static void
 618 queue_async_put_domains_work(struct i915_power_domains *power_domains,
 619                              intel_wakeref_t wakeref,
 620                              int delay_ms)
 621 {
 622         struct drm_i915_private *i915 = container_of(power_domains,
 623                                                      struct drm_i915_private,
 624                                                      display.power.domains);
 625         drm_WARN_ON(&i915->drm, power_domains->async_put_wakeref);
 626         power_domains->async_put_wakeref = wakeref;
 627         drm_WARN_ON(&i915->drm, !queue_delayed_work(system_unbound_wq,
 628                                                     &power_domains->async_put_work,
 629                                                     msecs_to_jiffies(delay_ms)));
 630 }
 631
 632 static void
 633 release_async_put_domains(struct i915_power_domains *power_domains,
 634                           struct intel_power_domain_mask *mask)
 635 {
 636         struct drm_i915_private *dev_priv =
 637                 container_of(power_domains, struct drm_i915_private,
 638                              display.power.domains);
 639         struct intel_runtime_pm *rpm = &dev_priv->runtime_pm;
 640         enum intel_display_power_domain domain;
 641         intel_wakeref_t wakeref;
 642
 643         /*
 644          * The caller must hold already raw wakeref, upgrade that to a proper
 645          * wakeref to make the state checker happy about the HW access during
 646          * power well disabling.
 647          */
 648         assert_rpm_raw_wakeref_held(rpm);
 649         wakeref = intel_runtime_pm_get(rpm);
 650
 651         for_each_power_domain(domain, mask) {
 652                 /* Clear before put, so put's sanity check is happy. */
 653                 async_put_domains_clear_domain(power_domains, domain);
 654                 __intel_display_power_put_domain(dev_priv, domain);
 655         }
 656
 657         intel_runtime_pm_put(rpm, wakeref);
 658 }
 659
 660 static void
 661 intel_display_power_put_async_work(struct work_struct *work)
 662 {
 663         struct drm_i915_private *dev_priv =
 664                 container_of(work, struct drm_i915_private,
 665                              display.power.domains.async_put_work.work);
 666         struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
 667         struct intel_runtime_pm *rpm = &dev_priv->runtime_pm;
 668         intel_wakeref_t new_work_wakeref = intel_runtime_pm_get_raw(rpm);
 669         intel_wakeref_t old_work_wakeref = 0;
 670
 671         mutex_lock(&power_domains->lock);
 672
 673         /*
 674          * Bail out if all the domain refs pending to be released were grabbed
 675          * by subsequent gets or a flush_work.
 676          */
 677         old_work_wakeref = fetch_and_zero(&power_domains->async_put_wakeref);
 678         if (!old_work_wakeref)
 679                 goto out_verify;
 680
 681         release_async_put_domains(power_domains,
 682                                   &power_domains->async_put_domains[0]);
 683
 684         /* Requeue the work if more domains were async put meanwhile. */
 685         if (!bitmap_empty(power_domains->async_put_domains[1].bits, POWER_DOMAIN_NUM)) {
 686                 bitmap_copy(power_domains->async_put_domains[0].bits,
 687                             power_domains->async_put_domains[1].bits,
 688                             POWER_DOMAIN_NUM);
 689                 bitmap_zero(power_domains->async_put_domains[1].bits,
 690                             POWER_DOMAIN_NUM);
 691                 queue_async_put_domains_work(power_domains,
 692                                              fetch_and_zero(&new_work_wakeref),
 693                                              power_domains->async_put_next_delay);
 694                 power_domains->async_put_next_delay = 0;
 695         } else {
 696                 /*
 697                  * Cancel the work that got queued after this one got dequeued,
 698                  * since here we released the corresponding async-put reference.
 699                  */
 700                 cancel_async_put_work(power_domains, false);
 701         }
 702
 703 out_verify:
 704         verify_async_put_domains_state(power_domains);
 705
 706         mutex_unlock(&power_domains->lock);
 707
 708         if (old_work_wakeref)
 709                 intel_runtime_pm_put_raw(rpm, old_work_wakeref);
 710         if (new_work_wakeref)
 711                 intel_runtime_pm_put_raw(rpm, new_work_wakeref);
 712 }
 713
 714 /**
 715  * __intel_display_power_put_async - release a power domain reference asynchronously
 716  * @i915: i915 device instance
 717  * @domain: power domain to reference
 718  * @wakeref: wakeref acquired for the reference that is being released
 719  * @delay_ms: delay of powering down the power domain
 720  *
 721  * This function drops the power domain reference obtained by
 722  * intel_display_power_get*() and schedules a work to power down the
 723  * corresponding hardware block if this is the last reference.
 724  * The power down is delayed by @delay_ms if this is >= 0, or by a default
 725  * 100 ms otherwise.
 726  */
 727 void __intel_display_power_put_async(struct drm_i915_private *i915,
 728                                      enum intel_display_power_domain domain,
 729                                      intel_wakeref_t wakeref,
 730                                      int delay_ms)
 731 {
 732         struct i915_power_domains *power_domains = &i915->display.power.domains;
 733         struct intel_runtime_pm *rpm = &i915->runtime_pm;
 734         intel_wakeref_t work_wakeref = intel_runtime_pm_get_raw(rpm);
 735
 736         delay_ms = delay_ms >= 0 ? delay_ms : 100;
 737
 738         mutex_lock(&power_domains->lock);
 739
 740         if (power_domains->domain_use_count[domain] > 1) {
 741                 __intel_display_power_put_domain(i915, domain);
 742
 743                 goto out_verify;
 744         }
 745
 746         drm_WARN_ON(&i915->drm, power_domains->domain_use_count[domain] != 1);
 747
 748         /* Let a pending work requeue itself or queue a new one. */
 749         if (power_domains->async_put_wakeref) {
 750                 set_bit(domain, power_domains->async_put_domains[1].bits);
 751                 power_domains->async_put_next_delay = max(power_domains->async_put_next_delay,
 752                                                           delay_ms);
 753         } else {
 754                 set_bit(domain, power_domains->async_put_domains[0].bits);
 755                 queue_async_put_domains_work(power_domains,
 756                                              fetch_and_zero(&work_wakeref),
 757                                              delay_ms);
 758         }
 759
 760 out_verify:
 761         verify_async_put_domains_state(power_domains);
 762
 763         mutex_unlock(&power_domains->lock);
 764
 765         if (work_wakeref)
 766                 intel_runtime_pm_put_raw(rpm, work_wakeref);
 767
 768         intel_runtime_pm_put(rpm, wakeref);
 769 }
 770
 771 /**
 772  * intel_display_power_flush_work - flushes the async display power disabling work
 773  * @i915: i915 device instance
 774  *
 775  * Flushes any pending work that was scheduled by a preceding
 776  * intel_display_power_put_async() call, completing the disabling of the
 777  * corresponding power domains.
 778  *
 779  * Note that the work handler function may still be running after this
 780  * function returns; to ensure that the work handler isn't running use
 781  * intel_display_power_flush_work_sync() instead.
 782  */
 783 void intel_display_power_flush_work(struct drm_i915_private *i915)
 784 {
 785         struct i915_power_domains *power_domains = &i915->display.power.domains;
 786         struct intel_power_domain_mask async_put_mask;
 787         intel_wakeref_t work_wakeref;
 788
 789         mutex_lock(&power_domains->lock);
 790
 791         work_wakeref = fetch_and_zero(&power_domains->async_put_wakeref);
 792         if (!work_wakeref)
 793                 goto out_verify;
 794
 795         async_put_domains_mask(power_domains, &async_put_mask);
 796         release_async_put_domains(power_domains, &async_put_mask);
 797         cancel_async_put_work(power_domains, false);
 798
 799 out_verify:
 800         verify_async_put_domains_state(power_domains);
 801
 802         mutex_unlock(&power_domains->lock);
 803
 804         if (work_wakeref)
 805                 intel_runtime_pm_put_raw(&i915->runtime_pm, work_wakeref);
 806 }
 807
 808 /**
 809  * intel_display_power_flush_work_sync - flushes and syncs the async display power disabling work
 810  * @i915: i915 device instance
 811  *
 812  * Like intel_display_power_flush_work(), but also ensure that the work
 813  * handler function is not running any more when this function returns.
 814  */
 815 static void
 816 intel_display_power_flush_work_sync(struct drm_i915_private *i915)
 817 {
 818         struct i915_power_domains *power_domains = &i915->display.power.domains;
 819
 820         intel_display_power_flush_work(i915);
 821         cancel_async_put_work(power_domains, true);
 822
 823         verify_async_put_domains_state(power_domains);
 824
 825         drm_WARN_ON(&i915->drm, power_domains->async_put_wakeref);
 826 }
 827
 828 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
 829 /**
 830  * intel_display_power_put - release a power domain reference
 831  * @dev_priv: i915 device instance
 832  * @domain: power domain to reference
 833  * @wakeref: wakeref acquired for the reference that is being released
 834  *
 835  * This function drops the power domain reference obtained by
 836  * intel_display_power_get() and might power down the corresponding hardware
 837  * block right away if this is the last reference.
 838  */
 839 void intel_display_power_put(struct drm_i915_private *dev_priv,
 840                              enum intel_display_power_domain domain,
 841                              intel_wakeref_t wakeref)
 842 {
 843         __intel_display_power_put(dev_priv, domain);
 844         intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
 845 }
 846 #else
 847 /**
 848  * intel_display_power_put_unchecked - release an unchecked power domain reference
 849  * @dev_priv: i915 device instance
 850  * @domain: power domain to reference
 851  *
 852  * This function drops the power domain reference obtained by
 853  * intel_display_power_get() and might power down the corresponding hardware
 854  * block right away if this is the last reference.
 855  *
 856  * This function is only for the power domain code's internal use to suppress wakeref
 857  * tracking when the correspondig debug kconfig option is disabled, should not
 858  * be used otherwise.
 859  */
 860 void intel_display_power_put_unchecked(struct drm_i915_private *dev_priv,
 861                                        enum intel_display_power_domain domain)
 862 {
 863         __intel_display_power_put(dev_priv, domain);
 864         intel_runtime_pm_put_unchecked(&dev_priv->runtime_pm);
 865 }
 866 #endif
 867
 868 void
 869 intel_display_power_get_in_set(struct drm_i915_private *i915,
 870                                struct intel_display_power_domain_set *power_domain_set,
 871                                enum intel_display_power_domain domain)
 872 {
 873         intel_wakeref_t __maybe_unused wf;
 874
 875         drm_WARN_ON(&i915->drm, test_bit(domain, power_domain_set->mask.bits));
 876
 877         wf = intel_display_power_get(i915, domain);
 878 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
 879         power_domain_set->wakerefs[domain] = wf;
 880 #endif
 881         set_bit(domain, power_domain_set->mask.bits);
 882 }
 883
 884 bool
 885 intel_display_power_get_in_set_if_enabled(struct drm_i915_private *i915,
 886                                           struct intel_display_power_domain_set *power_domain_set,
 887                                           enum intel_display_power_domain domain)
 888 {
 889         intel_wakeref_t wf;
 890
 891         drm_WARN_ON(&i915->drm, test_bit(domain, power_domain_set->mask.bits));
 892
 893         wf = intel_display_power_get_if_enabled(i915, domain);
 894         if (!wf)
 895                 return false;
 896
 897 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
 898         power_domain_set->wakerefs[domain] = wf;
 899 #endif
 900         set_bit(domain, power_domain_set->mask.bits);
 901
 902         return true;
 903 }
 904
 905 void
 906 intel_display_power_put_mask_in_set(struct drm_i915_private *i915,
 907                                     struct intel_display_power_domain_set *power_domain_set,
 908                                     struct intel_power_domain_mask *mask)
 909 {
 910         enum intel_display_power_domain domain;
 911
 912         drm_WARN_ON(&i915->drm,
 913                     !bitmap_subset(mask->bits, power_domain_set->mask.bits, POWER_DOMAIN_NUM));
 914
 915         for_each_power_domain(domain, mask) {
 916                 intel_wakeref_t __maybe_unused wf = -1;
 917
 918 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
 919                 wf = fetch_and_zero(&power_domain_set->wakerefs[domain]);
 920 #endif
 921                 intel_display_power_put(i915, domain, wf);
 922                 clear_bit(domain, power_domain_set->mask.bits);
 923         }
 924 }
 925
 926 static int
 927 sanitize_disable_power_well_option(const struct drm_i915_private *dev_priv,
 928                                    int disable_power_well)
 929 {
 930         if (disable_power_well >= 0)
 931                 return !!disable_power_well;
 932
 933         return 1;
 934 }
 935
 936 static u32 get_allowed_dc_mask(const struct drm_i915_private *dev_priv,
 937                                int enable_dc)
 938 {
 939         u32 mask;
 940         int requested_dc;
 941         int max_dc;
 942
 943         if (!HAS_DISPLAY(dev_priv))
 944                 return 0;
 945
 946         if (DISPLAY_VER(dev_priv) >= 20)
 947                 max_dc = 2;
 948         else if (IS_DG2(dev_priv))
 949                 max_dc = 1;
 950         else if (IS_DG1(dev_priv))
 951                 max_dc = 3;
 952         else if (DISPLAY_VER(dev_priv) >= 12)
 953                 max_dc = 4;
 954         else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv))
 955                 max_dc = 1;
 956         else if (DISPLAY_VER(dev_priv) >= 9)
 957                 max_dc = 2;
 958         else
 959                 max_dc = 0;
 960
 961         /*
 962          * DC9 has a separate HW flow from the rest of the DC states,
 963          * not depending on the DMC firmware. It's needed by system
 964          * suspend/resume, so allow it unconditionally.
 965          */
 966         mask = IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv) ||
 967                 DISPLAY_VER(dev_priv) >= 11 ?
 968                DC_STATE_EN_DC9 : 0;
 969
 970         if (!dev_priv->display.params.disable_power_well)
 971                 max_dc = 0;
 972
 973         if (enable_dc >= 0 && enable_dc <= max_dc) {
 974                 requested_dc = enable_dc;
 975         } else if (enable_dc == -1) {
 976                 requested_dc = max_dc;
 977         } else if (enable_dc > max_dc && enable_dc <= 4) {
 978                 drm_dbg_kms(&dev_priv->drm,
 979                             "Adjusting requested max DC state (%d->%d)\n",
 980                             enable_dc, max_dc);
 981                 requested_dc = max_dc;
 982         } else {
 983                 drm_err(&dev_priv->drm,
 984                         "Unexpected value for enable_dc (%d)\n", enable_dc);
 985                 requested_dc = max_dc;
 986         }
 987
 988         switch (requested_dc) {
 989         case 4:
 990                 mask |= DC_STATE_EN_DC3CO | DC_STATE_EN_UPTO_DC6;
 991                 break;
 992         case 3:
 993                 mask |= DC_STATE_EN_DC3CO | DC_STATE_EN_UPTO_DC5;
 994                 break;
 995         case 2:
 996                 mask |= DC_STATE_EN_UPTO_DC6;
 997                 break;
 998         case 1:
 999                 mask |= DC_STATE_EN_UPTO_DC5;
1000                 break;
1001         }
1002
1003         drm_dbg_kms(&dev_priv->drm, "Allowed DC state mask %02x\n", mask);
1004
1005         return mask;
1006 }
1007
1008 /**
1009  * intel_power_domains_init - initializes the power domain structures
1010  * @dev_priv: i915 device instance
1011  *
1012  * Initializes the power domain structures for @dev_priv depending upon the
1013  * supported platform.
1014  */
1015 int intel_power_domains_init(struct drm_i915_private *dev_priv)
1016 {
1017         struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
1018
1019         dev_priv->display.params.disable_power_well =
1020                 sanitize_disable_power_well_option(dev_priv,
1021                                                    dev_priv->display.params.disable_power_well);
1022         power_domains->allowed_dc_mask =
1023                 get_allowed_dc_mask(dev_priv, dev_priv->display.params.enable_dc);
1024
1025         power_domains->target_dc_state =
1026                 sanitize_target_dc_state(dev_priv, DC_STATE_EN_UPTO_DC6);
1027
1028         mutex_init(&power_domains->lock);
1029
1030         INIT_DELAYED_WORK(&power_domains->async_put_work,
1031                           intel_display_power_put_async_work);
1032
1033         return intel_display_power_map_init(power_domains);
1034 }
1035
1036 /**
1037  * intel_power_domains_cleanup - clean up power domains resources
1038  * @dev_priv: i915 device instance
1039  *
1040  * Release any resources acquired by intel_power_domains_init()
1041  */
1042 void intel_power_domains_cleanup(struct drm_i915_private *dev_priv)
1043 {
1044         intel_display_power_map_cleanup(&dev_priv->display.power.domains);
1045 }
1046
1047 static void intel_power_domains_sync_hw(struct drm_i915_private *dev_priv)
1048 {
1049         struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
1050         struct i915_power_well *power_well;
1051
1052         mutex_lock(&power_domains->lock);
1053         for_each_power_well(dev_priv, power_well)
1054                 intel_power_well_sync_hw(dev_priv, power_well);
1055         mutex_unlock(&power_domains->lock);
1056 }
1057
1058 static void gen9_dbuf_slice_set(struct drm_i915_private *dev_priv,
1059                                 enum dbuf_slice slice, bool enable)
1060 {
1061         i915_reg_t reg = DBUF_CTL_S(slice);
1062         bool state;
1063
1064         intel_de_rmw(dev_priv, reg, DBUF_POWER_REQUEST,
1065                      enable ? DBUF_POWER_REQUEST : 0);
1066         intel_de_posting_read(dev_priv, reg);
1067         udelay(10);
1068
1069         state = intel_de_read(dev_priv, reg) & DBUF_POWER_STATE;
1070         drm_WARN(&dev_priv->drm, enable != state,
1071                  "DBuf slice %d power %s timeout!\n",
1072                  slice, str_enable_disable(enable));
1073 }
1074
1075 void gen9_dbuf_slices_update(struct drm_i915_private *dev_priv,
1076                              u8 req_slices)
1077 {
1078         struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
1079         u8 slice_mask = DISPLAY_INFO(dev_priv)->dbuf.slice_mask;
1080         enum dbuf_slice slice;
1081
1082         drm_WARN(&dev_priv->drm, req_slices & ~slice_mask,
1083                  "Invalid set of dbuf slices (0x%x) requested (total dbuf slices 0x%x)\n",
1084                  req_slices, slice_mask);
1085
1086         drm_dbg_kms(&dev_priv->drm, "Updating dbuf slices to 0x%x\n",
1087                     req_slices);
1088
1089         /*
1090          * Might be running this in parallel to gen9_dc_off_power_well_enable
1091          * being called from intel_dp_detect for instance,
1092          * which causes assertion triggered by race condition,
1093          * as gen9_assert_dbuf_enabled might preempt this when registers
1094          * were already updated, while dev_priv was not.
1095          */
1096         mutex_lock(&power_domains->lock);
1097
1098         for_each_dbuf_slice(dev_priv, slice)
1099                 gen9_dbuf_slice_set(dev_priv, slice, req_slices & BIT(slice));
1100
1101         dev_priv->display.dbuf.enabled_slices = req_slices;
1102
1103         mutex_unlock(&power_domains->lock);
1104 }
1105
1106 static void gen9_dbuf_enable(struct drm_i915_private *dev_priv)
1107 {
1108         u8 slices_mask;
1109
1110         dev_priv->display.dbuf.enabled_slices =
1111                 intel_enabled_dbuf_slices_mask(dev_priv);
1112
1113         slices_mask = BIT(DBUF_S1) | dev_priv->display.dbuf.enabled_slices;
1114
1115         if (DISPLAY_VER(dev_priv) >= 14)
1116                 intel_pmdemand_program_dbuf(dev_priv, slices_mask);
1117
1118         /*
1119          * Just power up at least 1 slice, we will
1120          * figure out later which slices we have and what we need.
1121          */
1122         gen9_dbuf_slices_update(dev_priv, slices_mask);
1123 }
1124
1125 static void gen9_dbuf_disable(struct drm_i915_private *dev_priv)
1126 {
1127         gen9_dbuf_slices_update(dev_priv, 0);
1128
1129         if (DISPLAY_VER(dev_priv) >= 14)
1130                 intel_pmdemand_program_dbuf(dev_priv, 0);
1131 }
1132
1133 static void gen12_dbuf_slices_config(struct drm_i915_private *dev_priv)
1134 {
1135         enum dbuf_slice slice;
1136
1137         if (IS_ALDERLAKE_P(dev_priv))
1138                 return;
1139
1140         for_each_dbuf_slice(dev_priv, slice)
1141                 intel_de_rmw(dev_priv, DBUF_CTL_S(slice),
1142                              DBUF_TRACKER_STATE_SERVICE_MASK,
1143                              DBUF_TRACKER_STATE_SERVICE(8));
1144 }
1145
1146 static void icl_mbus_init(struct drm_i915_private *dev_priv)
1147 {
1148         unsigned long abox_regs = DISPLAY_INFO(dev_priv)->abox_mask;
1149         u32 mask, val, i;
1150
1151         if (IS_ALDERLAKE_P(dev_priv) || DISPLAY_VER(dev_priv) >= 14)
1152                 return;
1153
1154         mask = MBUS_ABOX_BT_CREDIT_POOL1_MASK |
1155                 MBUS_ABOX_BT_CREDIT_POOL2_MASK |
1156                 MBUS_ABOX_B_CREDIT_MASK |
1157                 MBUS_ABOX_BW_CREDIT_MASK;
1158         val = MBUS_ABOX_BT_CREDIT_POOL1(16) |
1159                 MBUS_ABOX_BT_CREDIT_POOL2(16) |
1160                 MBUS_ABOX_B_CREDIT(1) |
1161                 MBUS_ABOX_BW_CREDIT(1);
1162
1163         /*
1164          * gen12 platforms that use abox1 and abox2 for pixel data reads still
1165          * expect us to program the abox_ctl0 register as well, even though
1166          * we don't have to program other instance-0 registers like BW_BUDDY.
1167          */
1168         if (DISPLAY_VER(dev_priv) == 12)
1169                 abox_regs |= BIT(0);
1170
1171         for_each_set_bit(i, &abox_regs, sizeof(abox_regs))
1172                 intel_de_rmw(dev_priv, MBUS_ABOX_CTL(i), mask, val);
1173 }
1174
1175 static void hsw_assert_cdclk(struct drm_i915_private *dev_priv)
1176 {
1177         u32 val = intel_de_read(dev_priv, LCPLL_CTL);
1178
1179         /*
1180          * The LCPLL register should be turned on by the BIOS. For now
1181          * let's just check its state and print errors in case
1182          * something is wrong.  Don't even try to turn it on.
1183          */
1184
1185         if (val & LCPLL_CD_SOURCE_FCLK)
1186                 drm_err(&dev_priv->drm, "CDCLK source is not LCPLL\n");
1187
1188         if (val & LCPLL_PLL_DISABLE)
1189                 drm_err(&dev_priv->drm, "LCPLL is disabled\n");
1190
1191         if ((val & LCPLL_REF_MASK) != LCPLL_REF_NON_SSC)
1192                 drm_err(&dev_priv->drm, "LCPLL not using non-SSC reference\n");
1193 }
1194
1195 static void assert_can_disable_lcpll(struct drm_i915_private *dev_priv)
1196 {
1197         struct intel_crtc *crtc;
1198
1199         for_each_intel_crtc(&dev_priv->drm, crtc)
1200                 I915_STATE_WARN(dev_priv, crtc->active,
1201                                 "CRTC for pipe %c enabled\n",
1202                                 pipe_name(crtc->pipe));
1203
1204         I915_STATE_WARN(dev_priv, intel_de_read(dev_priv, HSW_PWR_WELL_CTL2),
1205                         "Display power well on\n");
1206         I915_STATE_WARN(dev_priv,
1207                         intel_de_read(dev_priv, SPLL_CTL) & SPLL_PLL_ENABLE,
1208                         "SPLL enabled\n");
1209         I915_STATE_WARN(dev_priv,
1210                         intel_de_read(dev_priv, WRPLL_CTL(0)) & WRPLL_PLL_ENABLE,
1211                         "WRPLL1 enabled\n");
1212         I915_STATE_WARN(dev_priv,
1213                         intel_de_read(dev_priv, WRPLL_CTL(1)) & WRPLL_PLL_ENABLE,
1214                         "WRPLL2 enabled\n");
1215         I915_STATE_WARN(dev_priv,
1216                         intel_de_read(dev_priv, PP_STATUS(0)) & PP_ON,
1217                         "Panel power on\n");
1218         I915_STATE_WARN(dev_priv,
1219                         intel_de_read(dev_priv, BLC_PWM_CPU_CTL2) & BLM_PWM_ENABLE,
1220                         "CPU PWM1 enabled\n");
1221         if (IS_HASWELL(dev_priv))
1222                 I915_STATE_WARN(dev_priv,
1223                                 intel_de_read(dev_priv, HSW_BLC_PWM2_CTL) & BLM_PWM_ENABLE,
1224                                 "CPU PWM2 enabled\n");
1225         I915_STATE_WARN(dev_priv,
1226                         intel_de_read(dev_priv, BLC_PWM_PCH_CTL1) & BLM_PCH_PWM_ENABLE,
1227                         "PCH PWM1 enabled\n");
1228         I915_STATE_WARN(dev_priv,
1229                         (intel_de_read(dev_priv, UTIL_PIN_CTL) & (UTIL_PIN_ENABLE | UTIL_PIN_MODE_MASK)) == (UTIL_PIN_ENABLE | UTIL_PIN_MODE_PWM),
1230                         "Utility pin enabled in PWM mode\n");
1231         I915_STATE_WARN(dev_priv,
1232                         intel_de_read(dev_priv, PCH_GTC_CTL) & PCH_GTC_ENABLE,
1233                         "PCH GTC enabled\n");
1234
1235         /*
1236          * In theory we can still leave IRQs enabled, as long as only the HPD
1237          * interrupts remain enabled. We used to check for that, but since it's
1238          * gen-specific and since we only disable LCPLL after we fully disable
1239          * the interrupts, the check below should be enough.
1240          */
1241         I915_STATE_WARN(dev_priv, intel_irqs_enabled(dev_priv),
1242                         "IRQs enabled\n");
1243 }
1244
1245 static u32 hsw_read_dcomp(struct drm_i915_private *dev_priv)
1246 {
1247         if (IS_HASWELL(dev_priv))
1248                 return intel_de_read(dev_priv, D_COMP_HSW);
1249         else
1250                 return intel_de_read(dev_priv, D_COMP_BDW);
1251 }
1252
1253 static void hsw_write_dcomp(struct drm_i915_private *dev_priv, u32 val)
1254 {
1255         if (IS_HASWELL(dev_priv)) {
1256                 if (snb_pcode_write(&dev_priv->uncore, GEN6_PCODE_WRITE_D_COMP, val))
1257                         drm_dbg_kms(&dev_priv->drm,
1258                                     "Failed to write to D_COMP\n");
1259         } else {
1260                 intel_de_write(dev_priv, D_COMP_BDW, val);
1261                 intel_de_posting_read(dev_priv, D_COMP_BDW);
1262         }
1263 }
1264
1265 /*
1266  * This function implements pieces of two sequences from BSpec:
1267  * - Sequence for display software to disable LCPLL
1268  * - Sequence for display software to allow package C8+
1269  * The steps implemented here are just the steps that actually touch the LCPLL
1270  * register. Callers should take care of disabling all the display engine
1271  * functions, doing the mode unset, fixing interrupts, etc.
1272  */
1273 static void hsw_disable_lcpll(struct drm_i915_private *dev_priv,
1274                               bool switch_to_fclk, bool allow_power_down)
1275 {
1276         u32 val;
1277
1278         assert_can_disable_lcpll(dev_priv);
1279
1280         val = intel_de_read(dev_priv, LCPLL_CTL);
1281
1282         if (switch_to_fclk) {
1283                 val |= LCPLL_CD_SOURCE_FCLK;
1284                 intel_de_write(dev_priv, LCPLL_CTL, val);
1285
1286                 if (wait_for_us(intel_de_read(dev_priv, LCPLL_CTL) &
1287                                 LCPLL_CD_SOURCE_FCLK_DONE, 1))
1288                         drm_err(&dev_priv->drm, "Switching to FCLK failed\n");
1289
1290                 val = intel_de_read(dev_priv, LCPLL_CTL);
1291         }
1292
1293         val |= LCPLL_PLL_DISABLE;
1294         intel_de_write(dev_priv, LCPLL_CTL, val);
1295         intel_de_posting_read(dev_priv, LCPLL_CTL);
1296
1297         if (intel_de_wait_for_clear(dev_priv, LCPLL_CTL, LCPLL_PLL_LOCK, 1))
1298                 drm_err(&dev_priv->drm, "LCPLL still locked\n");
1299
1300         val = hsw_read_dcomp(dev_priv);
1301         val |= D_COMP_COMP_DISABLE;
1302         hsw_write_dcomp(dev_priv, val);
1303         ndelay(100);
1304
1305         if (wait_for((hsw_read_dcomp(dev_priv) &
1306                       D_COMP_RCOMP_IN_PROGRESS) == 0, 1))
1307                 drm_err(&dev_priv->drm, "D_COMP RCOMP still in progress\n");
1308
1309         if (allow_power_down) {
1310                 intel_de_rmw(dev_priv, LCPLL_CTL, 0, LCPLL_POWER_DOWN_ALLOW);
1311                 intel_de_posting_read(dev_priv, LCPLL_CTL);
1312         }
1313 }
1314
1315 /*
1316  * Fully restores LCPLL, disallowing power down and switching back to LCPLL
1317  * source.
1318  */
1319 static void hsw_restore_lcpll(struct drm_i915_private *dev_priv)
1320 {
1321         u32 val;
1322
1323         val = intel_de_read(dev_priv, LCPLL_CTL);
1324
1325         if ((val & (LCPLL_PLL_LOCK | LCPLL_PLL_DISABLE | LCPLL_CD_SOURCE_FCLK |
1326                     LCPLL_POWER_DOWN_ALLOW)) == LCPLL_PLL_LOCK)
1327                 return;
1328
1329         /*
1330          * Make sure we're not on PC8 state before disabling PC8, otherwise
1331          * we'll hang the machine. To prevent PC8 state, just enable force_wake.
1332          */
1333         intel_uncore_forcewake_get(&dev_priv->uncore, FORCEWAKE_ALL);
1334
1335         if (val & LCPLL_POWER_DOWN_ALLOW) {
1336                 val &= ~LCPLL_POWER_DOWN_ALLOW;
1337                 intel_de_write(dev_priv, LCPLL_CTL, val);
1338                 intel_de_posting_read(dev_priv, LCPLL_CTL);
1339         }
1340
1341         val = hsw_read_dcomp(dev_priv);
1342         val |= D_COMP_COMP_FORCE;
1343         val &= ~D_COMP_COMP_DISABLE;
1344         hsw_write_dcomp(dev_priv, val);
1345
1346         val = intel_de_read(dev_priv, LCPLL_CTL);
1347         val &= ~LCPLL_PLL_DISABLE;
1348         intel_de_write(dev_priv, LCPLL_CTL, val);
1349
1350         if (intel_de_wait_for_set(dev_priv, LCPLL_CTL, LCPLL_PLL_LOCK, 5))
1351                 drm_err(&dev_priv->drm, "LCPLL not locked yet\n");
1352
1353         if (val & LCPLL_CD_SOURCE_FCLK) {
1354                 intel_de_rmw(dev_priv, LCPLL_CTL, LCPLL_CD_SOURCE_FCLK, 0);
1355
1356                 if (wait_for_us((intel_de_read(dev_priv, LCPLL_CTL) &
1357                                  LCPLL_CD_SOURCE_FCLK_DONE) == 0, 1))
1358                         drm_err(&dev_priv->drm,
1359                                 "Switching back to LCPLL failed\n");
1360         }
1361
1362         intel_uncore_forcewake_put(&dev_priv->uncore, FORCEWAKE_ALL);
1363
1364         intel_update_cdclk(dev_priv);
1365         intel_cdclk_dump_config(dev_priv, &dev_priv->display.cdclk.hw, "Current CDCLK");
1366 }
1367
1368 /*
1369  * Package states C8 and deeper are really deep PC states that can only be
1370  * reached when all the devices on the system allow it, so even if the graphics
1371  * device allows PC8+, it doesn't mean the system will actually get to these
1372  * states. Our driver only allows PC8+ when going into runtime PM.
1373  *
1374  * The requirements for PC8+ are that all the outputs are disabled, the power
1375  * well is disabled and most interrupts are disabled, and these are also
1376  * requirements for runtime PM. When these conditions are met, we manually do
1377  * the other conditions: disable the interrupts, clocks and switch LCPLL refclk
1378  * to Fclk. If we're in PC8+ and we get an non-hotplug interrupt, we can hard
1379  * hang the machine.
1380  *
1381  * When we really reach PC8 or deeper states (not just when we allow it) we lose
1382  * the state of some registers, so when we come back from PC8+ we need to
1383  * restore this state. We don't get into PC8+ if we're not in RC6, so we don't
1384  * need to take care of the registers kept by RC6. Notice that this happens even
1385  * if we don't put the device in PCI D3 state (which is what currently happens
1386  * because of the runtime PM support).
1387  *
1388  * For more, read "Display Sequences for Package C8" on the hardware
1389  * documentation.
1390  */
1391 static void hsw_enable_pc8(struct drm_i915_private *dev_priv)
1392 {
1393         drm_dbg_kms(&dev_priv->drm, "Enabling package C8+\n");
1394
1395         if (HAS_PCH_LPT_LP(dev_priv))
1396                 intel_de_rmw(dev_priv, SOUTH_DSPCLK_GATE_D,
1397                              PCH_LP_PARTITION_LEVEL_DISABLE, 0);
1398
1399         lpt_disable_clkout_dp(dev_priv);
1400         hsw_disable_lcpll(dev_priv, true, true);
1401 }
1402
1403 static void hsw_disable_pc8(struct drm_i915_private *dev_priv)
1404 {
1405         drm_dbg_kms(&dev_priv->drm, "Disabling package C8+\n");
1406
1407         hsw_restore_lcpll(dev_priv);
1408         intel_init_pch_refclk(dev_priv);
1409
1410         /* Many display registers don't survive PC8+ */
1411         intel_clock_gating_init(dev_priv);
1412 }
1413
1414 static void intel_pch_reset_handshake(struct drm_i915_private *dev_priv,
1415                                       bool enable)
1416 {
1417         i915_reg_t reg;
1418         u32 reset_bits;
1419
1420         if (IS_IVYBRIDGE(dev_priv)) {
1421                 reg = GEN7_MSG_CTL;
1422                 reset_bits = WAIT_FOR_PCH_FLR_ACK | WAIT_FOR_PCH_RESET_ACK;
1423         } else {
1424                 reg = HSW_NDE_RSTWRN_OPT;
1425                 reset_bits = RESET_PCH_HANDSHAKE_ENABLE;
1426         }
1427
1428         if (DISPLAY_VER(dev_priv) >= 14)
1429                 reset_bits |= MTL_RESET_PICA_HANDSHAKE_EN;
1430
1431         intel_de_rmw(dev_priv, reg, reset_bits, enable ? reset_bits : 0);
1432 }
1433
1434 static void skl_display_core_init(struct drm_i915_private *dev_priv,
1435                                   bool resume)
1436 {
1437         struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
1438         struct i915_power_well *well;
1439
1440         gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
1441
1442         /* enable PCH reset handshake */
1443         intel_pch_reset_handshake(dev_priv, !HAS_PCH_NOP(dev_priv));
1444
1445         if (!HAS_DISPLAY(dev_priv))
1446                 return;
1447
1448         /* enable PG1 and Misc I/O */
1449         mutex_lock(&power_domains->lock);
1450
1451         well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
1452         intel_power_well_enable(dev_priv, well);
1453
1454         well = lookup_power_well(dev_priv, SKL_DISP_PW_MISC_IO);
1455         intel_power_well_enable(dev_priv, well);
1456
1457         mutex_unlock(&power_domains->lock);
1458
1459         intel_cdclk_init_hw(dev_priv);
1460
1461         gen9_dbuf_enable(dev_priv);
1462
1463         if (resume)
1464                 intel_dmc_load_program(dev_priv);
1465 }
1466
1467 static void skl_display_core_uninit(struct drm_i915_private *dev_priv)
1468 {
1469         struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
1470         struct i915_power_well *well;
1471
1472         if (!HAS_DISPLAY(dev_priv))
1473                 return;
1474
1475         gen9_disable_dc_states(dev_priv);
1476         /* TODO: disable DMC program */
1477
1478         gen9_dbuf_disable(dev_priv);
1479
1480         intel_cdclk_uninit_hw(dev_priv);
1481
1482         /* The spec doesn't call for removing the reset handshake flag */
1483         /* disable PG1 and Misc I/O */
1484
1485         mutex_lock(&power_domains->lock);
1486
1487         /*
1488          * BSpec says to keep the MISC IO power well enabled here, only
1489          * remove our request for power well 1.
1490          * Note that even though the driver's request is removed power well 1
1491          * may stay enabled after this due to DMC's own request on it.
1492          */
1493         well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
1494         intel_power_well_disable(dev_priv, well);
1495
1496         mutex_unlock(&power_domains->lock);
1497
1498         usleep_range(10, 30);           /* 10 us delay per Bspec */
1499 }
1500
1501 static void bxt_display_core_init(struct drm_i915_private *dev_priv, bool resume)
1502 {
1503         struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
1504         struct i915_power_well *well;
1505
1506         gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
1507
1508         /*
1509          * NDE_RSTWRN_OPT RST PCH Handshake En must always be 0b on BXT
1510          * or else the reset will hang because there is no PCH to respond.
1511          * Move the handshake programming to initialization sequence.
1512          * Previously was left up to BIOS.
1513          */
1514         intel_pch_reset_handshake(dev_priv, false);
1515
1516         if (!HAS_DISPLAY(dev_priv))
1517                 return;
1518
1519         /* Enable PG1 */
1520         mutex_lock(&power_domains->lock);
1521
1522         well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
1523         intel_power_well_enable(dev_priv, well);
1524
1525         mutex_unlock(&power_domains->lock);
1526
1527         intel_cdclk_init_hw(dev_priv);
1528
1529         gen9_dbuf_enable(dev_priv);
1530
1531         if (resume)
1532                 intel_dmc_load_program(dev_priv);
1533 }
1534
1535 static void bxt_display_core_uninit(struct drm_i915_private *dev_priv)
1536 {
1537         struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
1538         struct i915_power_well *well;
1539
1540         if (!HAS_DISPLAY(dev_priv))
1541                 return;
1542
1543         gen9_disable_dc_states(dev_priv);
1544         /* TODO: disable DMC program */
1545
1546         gen9_dbuf_disable(dev_priv);
1547
1548         intel_cdclk_uninit_hw(dev_priv);
1549
1550         /* The spec doesn't call for removing the reset handshake flag */
1551
1552         /*
1553          * Disable PW1 (PG1).
1554          * Note that even though the driver's request is removed power well 1
1555          * may stay enabled after this due to DMC's own request on it.
1556          */
1557         mutex_lock(&power_domains->lock);
1558
1559         well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
1560         intel_power_well_disable(dev_priv, well);
1561
1562         mutex_unlock(&power_domains->lock);
1563
1564         usleep_range(10, 30);           /* 10 us delay per Bspec */
1565 }
1566
1567 struct buddy_page_mask {
1568         u32 page_mask;
1569         u8 type;
1570         u8 num_channels;
1571 };
1572
1573 static const struct buddy_page_mask tgl_buddy_page_masks[] = {
1574         { .num_channels = 1, .type = INTEL_DRAM_DDR4,   .page_mask = 0xF },
1575         { .num_channels = 1, .type = INTEL_DRAM_DDR5,   .page_mask = 0xF },
1576         { .num_channels = 2, .type = INTEL_DRAM_LPDDR4, .page_mask = 0x1C },
1577         { .num_channels = 2, .type = INTEL_DRAM_LPDDR5, .page_mask = 0x1C },
1578         { .num_channels = 2, .type = INTEL_DRAM_DDR4,   .page_mask = 0x1F },
1579         { .num_channels = 2, .type = INTEL_DRAM_DDR5,   .page_mask = 0x1E },
1580         { .num_channels = 4, .type = INTEL_DRAM_LPDDR4, .page_mask = 0x38 },
1581         { .num_channels = 4, .type = INTEL_DRAM_LPDDR5, .page_mask = 0x38 },
1582         {}
1583 };
1584
1585 static const struct buddy_page_mask wa_1409767108_buddy_page_masks[] = {
1586         { .num_channels = 1, .type = INTEL_DRAM_LPDDR4, .page_mask = 0x1 },
1587         { .num_channels = 1, .type = INTEL_DRAM_DDR4,   .page_mask = 0x1 },
1588         { .num_channels = 1, .type = INTEL_DRAM_DDR5,   .page_mask = 0x1 },
1589         { .num_channels = 1, .type = INTEL_DRAM_LPDDR5, .page_mask = 0x1 },
1590         { .num_channels = 2, .type = INTEL_DRAM_LPDDR4, .page_mask = 0x3 },
1591         { .num_channels = 2, .type = INTEL_DRAM_DDR4,   .page_mask = 0x3 },
1592         { .num_channels = 2, .type = INTEL_DRAM_DDR5,   .page_mask = 0x3 },
1593         { .num_channels = 2, .type = INTEL_DRAM_LPDDR5, .page_mask = 0x3 },
1594         {}
1595 };
1596
1597 static void tgl_bw_buddy_init(struct drm_i915_private *dev_priv)
1598 {
1599         enum intel_dram_type type = dev_priv->dram_info.type;
1600         u8 num_channels = dev_priv->dram_info.num_channels;
1601         const struct buddy_page_mask *table;
1602         unsigned long abox_mask = DISPLAY_INFO(dev_priv)->abox_mask;
1603         int config, i;
1604
1605         /* BW_BUDDY registers are not used on dgpu's beyond DG1 */
1606         if (IS_DGFX(dev_priv) && !IS_DG1(dev_priv))
1607                 return;
1608
1609         if (IS_ALDERLAKE_S(dev_priv) ||
1610             (IS_ROCKETLAKE(dev_priv) && IS_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0)))
1611                 /* Wa_1409767108 */
1612                 table = wa_1409767108_buddy_page_masks;
1613         else
1614                 table = tgl_buddy_page_masks;
1615
1616         for (config = 0; table[config].page_mask != 0; config++)
1617                 if (table[config].num_channels == num_channels &&
1618                     table[config].type == type)
1619                         break;
1620
1621         if (table[config].page_mask == 0) {
1622                 drm_dbg(&dev_priv->drm,
1623                         "Unknown memory configuration; disabling address buddy logic.\n");
1624                 for_each_set_bit(i, &abox_mask, sizeof(abox_mask))
1625                         intel_de_write(dev_priv, BW_BUDDY_CTL(i),
1626                                        BW_BUDDY_DISABLE);
1627         } else {
1628                 for_each_set_bit(i, &abox_mask, sizeof(abox_mask)) {
1629                         intel_de_write(dev_priv, BW_BUDDY_PAGE_MASK(i),
1630                                        table[config].page_mask);
1631
1632                         /* Wa_22010178259:tgl,dg1,rkl,adl-s */
1633                         if (DISPLAY_VER(dev_priv) == 12)
1634                                 intel_de_rmw(dev_priv, BW_BUDDY_CTL(i),
1635                                              BW_BUDDY_TLB_REQ_TIMER_MASK,
1636                                              BW_BUDDY_TLB_REQ_TIMER(0x8));
1637                 }
1638         }
1639 }
1640
1641 static void icl_display_core_init(struct drm_i915_private *dev_priv,
1642                                   bool resume)
1643 {
1644         struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
1645         struct i915_power_well *well;
1646
1647         gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
1648
1649         /* Wa_14011294188:ehl,jsl,tgl,rkl,adl-s */
1650         if (INTEL_PCH_TYPE(dev_priv) >= PCH_TGP &&
1651             INTEL_PCH_TYPE(dev_priv) < PCH_DG1)
1652                 intel_de_rmw(dev_priv, SOUTH_DSPCLK_GATE_D, 0,
1653                              PCH_DPMGUNIT_CLOCK_GATE_DISABLE);
1654
1655         /* 1. Enable PCH reset handshake. */
1656         intel_pch_reset_handshake(dev_priv, !HAS_PCH_NOP(dev_priv));
1657
1658         if (!HAS_DISPLAY(dev_priv))
1659                 return;
1660
1661         /* 2. Initialize all combo phys */
1662         intel_combo_phy_init(dev_priv);
1663
1664         /*
1665          * 3. Enable Power Well 1 (PG1).
1666          *    The AUX IO power wells will be enabled on demand.
1667          */
1668         mutex_lock(&power_domains->lock);
1669         well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
1670         intel_power_well_enable(dev_priv, well);
1671         mutex_unlock(&power_domains->lock);
1672
1673         if (DISPLAY_VER(dev_priv) == 14)
1674                 intel_de_rmw(dev_priv, DC_STATE_EN,
1675                              HOLD_PHY_PG1_LATCH | HOLD_PHY_CLKREQ_PG1_LATCH, 0);
1676
1677         /* 4. Enable CDCLK. */
1678         intel_cdclk_init_hw(dev_priv);
1679
1680         if (DISPLAY_VER(dev_priv) >= 12)
1681                 gen12_dbuf_slices_config(dev_priv);
1682
1683         /* 5. Enable DBUF. */
1684         gen9_dbuf_enable(dev_priv);
1685
1686         /* 6. Setup MBUS. */
1687         icl_mbus_init(dev_priv);
1688
1689         /* 7. Program arbiter BW_BUDDY registers */
1690         if (DISPLAY_VER(dev_priv) >= 12)
1691                 tgl_bw_buddy_init(dev_priv);
1692
1693         /* 8. Ensure PHYs have completed calibration and adaptation */
1694         if (IS_DG2(dev_priv))
1695                 intel_snps_phy_wait_for_calibration(dev_priv);
1696
1697         if (resume)
1698                 intel_dmc_load_program(dev_priv);
1699
1700         /* Wa_14011508470:tgl,dg1,rkl,adl-s,adl-p,dg2 */
1701         if (IS_DISPLAY_IP_RANGE(dev_priv, IP_VER(12, 0), IP_VER(13, 0)))
1702                 intel_de_rmw(dev_priv, GEN11_CHICKEN_DCPR_2, 0,
1703                              DCPR_CLEAR_MEMSTAT_DIS | DCPR_SEND_RESP_IMM |
1704                              DCPR_MASK_LPMODE | DCPR_MASK_MAXLATENCY_MEMUP_CLR);
1705
1706         /* Wa_14011503030:xelpd */
1707         if (DISPLAY_VER(dev_priv) == 13)
1708                 intel_de_write(dev_priv, XELPD_DISPLAY_ERR_FATAL_MASK, ~0);
1709 }
1710
1711 static void icl_display_core_uninit(struct drm_i915_private *dev_priv)
1712 {
1713         struct i915_power_domains *power_domains = &dev_priv->display.power.domains;
1714         struct i915_power_well *well;
1715
1716         if (!HAS_DISPLAY(dev_priv))
1717                 return;
1718
1719         gen9_disable_dc_states(dev_priv);
1720         intel_dmc_disable_program(dev_priv);
1721
1722         /* 1. Disable all display engine functions -> aready done */
1723
1724         /* 2. Disable DBUF */
1725         gen9_dbuf_disable(dev_priv);
1726
1727         /* 3. Disable CD clock */
1728         intel_cdclk_uninit_hw(dev_priv);
1729
1730         if (DISPLAY_VER(dev_priv) == 14)
1731                 intel_de_rmw(dev_priv, DC_STATE_EN, 0,
1732                              HOLD_PHY_PG1_LATCH | HOLD_PHY_CLKREQ_PG1_LATCH);
1733
1734         /*
1735          * 4. Disable Power Well 1 (PG1).
1736          *    The AUX IO power wells are toggled on demand, so they are already
1737          *    disabled at this point.
1738          */
1739         mutex_lock(&power_domains->lock);
1740         well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
1741         intel_power_well_disable(dev_priv, well);
1742         mutex_unlock(&power_domains->lock);
1743
1744         /* 5. */
1745         intel_combo_phy_uninit(dev_priv);
1746 }
1747
1748 static void chv_phy_control_init(struct drm_i915_private *dev_priv)
1749 {
1750         struct i915_power_well *cmn_bc =
1751                 lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
1752         struct i915_power_well *cmn_d =
1753                 lookup_power_well(dev_priv, CHV_DISP_PW_DPIO_CMN_D);
1754
1755         /*
1756          * DISPLAY_PHY_CONTROL can get corrupted if read. As a
1757          * workaround never ever read DISPLAY_PHY_CONTROL, and
1758          * instead maintain a shadow copy ourselves. Use the actual
1759          * power well state and lane status to reconstruct the
1760          * expected initial value.
1761          */
1762         dev_priv->display.power.chv_phy_control =
1763                 PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY0) |
1764                 PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY1) |
1765                 PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH0) |
1766                 PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH1) |
1767                 PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY1, DPIO_CH0);
1768
1769         /*
1770          * If all lanes are disabled we leave the override disabled
1771          * with all power down bits cleared to match the state we
1772          * would use after disabling the port. Otherwise enable the
1773          * override and set the lane powerdown bits accding to the
1774          * current lane status.
1775          */
1776         if (intel_power_well_is_enabled(dev_priv, cmn_bc)) {
1777                 u32 status = intel_de_read(dev_priv, DPLL(PIPE_A));
1778                 unsigned int mask;
1779
1780                 mask = status & DPLL_PORTB_READY_MASK;
1781                 if (mask == 0xf)
1782                         mask = 0x0;
1783                 else
1784                         dev_priv->display.power.chv_phy_control |=
1785                                 PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0);
1786
1787                 dev_priv->display.power.chv_phy_control |=
1788                         PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH0);
1789
1790                 mask = (status & DPLL_PORTC_READY_MASK) >> 4;
1791                 if (mask == 0xf)
1792                         mask = 0x0;
1793                 else
1794                         dev_priv->display.power.chv_phy_control |=
1795                                 PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1);
1796
1797                 dev_priv->display.power.chv_phy_control |=
1798                         PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH1);
1799
1800                 dev_priv->display.power.chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY0);
1801
1802                 dev_priv->display.power.chv_phy_assert[DPIO_PHY0] = false;
1803         } else {
1804                 dev_priv->display.power.chv_phy_assert[DPIO_PHY0] = true;
1805         }
1806
1807         if (intel_power_well_is_enabled(dev_priv, cmn_d)) {
1808                 u32 status = intel_de_read(dev_priv, DPIO_PHY_STATUS);
1809                 unsigned int mask;
1810
1811                 mask = status & DPLL_PORTD_READY_MASK;
1812
1813                 if (mask == 0xf)
1814                         mask = 0x0;
1815                 else
1816                         dev_priv->display.power.chv_phy_control |=
1817                                 PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0);
1818
1819                 dev_priv->display.power.chv_phy_control |=
1820                         PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY1, DPIO_CH0);
1821
1822                 dev_priv->display.power.chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY1);
1823
1824                 dev_priv->display.power.chv_phy_assert[DPIO_PHY1] = false;
1825         } else {
1826                 dev_priv->display.power.chv_phy_assert[DPIO_PHY1] = true;
1827         }
1828
1829         drm_dbg_kms(&dev_priv->drm, "Initial PHY_CONTROL=0x%08x\n",
1830                     dev_priv->display.power.chv_phy_control);
1831
1832         /* Defer application of initial phy_control to enabling the powerwell */
1833 }
1834
1835 static void vlv_cmnlane_wa(struct drm_i915_private *dev_priv)
1836 {
1837         struct i915_power_well *cmn =
1838                 lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
1839         struct i915_power_well *disp2d =
1840                 lookup_power_well(dev_priv, VLV_DISP_PW_DISP2D);
1841
1842         /* If the display might be already active skip this */
1843         if (intel_power_well_is_enabled(dev_priv, cmn) &&
1844             intel_power_well_is_enabled(dev_priv, disp2d) &&
1845             intel_de_read(dev_priv, DPIO_CTL) & DPIO_CMNRST)
1846                 return;
1847
1848         drm_dbg_kms(&dev_priv->drm, "toggling display PHY side reset\n");
1849
1850         /* cmnlane needs DPLL registers */
1851         intel_power_well_enable(dev_priv, disp2d);
1852
1853         /*
1854          * From VLV2A0_DP_eDP_HDMI_DPIO_driver_vbios_notes_11.docx:
1855          * Need to assert and de-assert PHY SB reset by gating the
1856          * common lane power, then un-gating it.
1857          * Simply ungating isn't enough to reset the PHY enough to get
1858          * ports and lanes running.
1859          */
1860         intel_power_well_disable(dev_priv, cmn);
1861 }
1862
1863 static bool vlv_punit_is_power_gated(struct drm_i915_private *dev_priv, u32 reg0)
1864 {
1865         bool ret;
1866
1867         vlv_punit_get(dev_priv);
1868         ret = (vlv_punit_read(dev_priv, reg0) & SSPM0_SSC_MASK) == SSPM0_SSC_PWR_GATE;
1869         vlv_punit_put(dev_priv);
1870
1871         return ret;
1872 }
1873
1874 static void assert_ved_power_gated(struct drm_i915_private *dev_priv)
1875 {
1876         drm_WARN(&dev_priv->drm,
1877                  !vlv_punit_is_power_gated(dev_priv, PUNIT_REG_VEDSSPM0),
1878                  "VED not power gated\n");
1879 }
1880
1881 static void assert_isp_power_gated(struct drm_i915_private *dev_priv)
1882 {
1883         static const struct pci_device_id isp_ids[] = {
1884                 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0f38)},
1885                 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x22b8)},
1886                 {}
1887         };
1888
1889         drm_WARN(&dev_priv->drm, !pci_dev_present(isp_ids) &&
1890                  !vlv_punit_is_power_gated(dev_priv, PUNIT_REG_ISPSSPM0),
1891                  "ISP not power gated\n");
1892 }
1893
1894 static void intel_power_domains_verify_state(struct drm_i915_private *dev_priv);
1895
1896 /**
1897  * intel_power_domains_init_hw - initialize hardware power domain state
1898  * @i915: i915 device instance
1899  * @resume: Called from resume code paths or not
1900  *
1901  * This function initializes the hardware power domain state and enables all
1902  * power wells belonging to the INIT power domain. Power wells in other
1903  * domains (and not in the INIT domain) are referenced or disabled by
1904  * intel_modeset_readout_hw_state(). After that the reference count of each
1905  * power well must match its HW enabled state, see
1906  * intel_power_domains_verify_state().
1907  *
1908  * It will return with power domains disabled (to be enabled later by
1909  * intel_power_domains_enable()) and must be paired with
1910  * intel_power_domains_driver_remove().
1911  */
1912 void intel_power_domains_init_hw(struct drm_i915_private *i915, bool resume)
1913 {
1914         struct i915_power_domains *power_domains = &i915->display.power.domains;
1915
1916         power_domains->initializing = true;
1917
1918         if (DISPLAY_VER(i915) >= 11) {
1919                 icl_display_core_init(i915, resume);
1920         } else if (IS_GEMINILAKE(i915) || IS_BROXTON(i915)) {
1921                 bxt_display_core_init(i915, resume);
1922         } else if (DISPLAY_VER(i915) == 9) {
1923                 skl_display_core_init(i915, resume);
1924         } else if (IS_CHERRYVIEW(i915)) {
1925                 mutex_lock(&power_domains->lock);
1926                 chv_phy_control_init(i915);
1927                 mutex_unlock(&power_domains->lock);
1928                 assert_isp_power_gated(i915);
1929         } else if (IS_VALLEYVIEW(i915)) {
1930                 mutex_lock(&power_domains->lock);
1931                 vlv_cmnlane_wa(i915);
1932                 mutex_unlock(&power_domains->lock);
1933                 assert_ved_power_gated(i915);
1934                 assert_isp_power_gated(i915);
1935         } else if (IS_BROADWELL(i915) || IS_HASWELL(i915)) {
1936                 hsw_assert_cdclk(i915);
1937                 intel_pch_reset_handshake(i915, !HAS_PCH_NOP(i915));
1938         } else if (IS_IVYBRIDGE(i915)) {
1939                 intel_pch_reset_handshake(i915, !HAS_PCH_NOP(i915));
1940         }
1941
1942         /*
1943          * Keep all power wells enabled for any dependent HW access during
1944          * initialization and to make sure we keep BIOS enabled display HW
1945          * resources powered until display HW readout is complete. We drop
1946          * this reference in intel_power_domains_enable().
1947          */
1948         drm_WARN_ON(&i915->drm, power_domains->init_wakeref);
1949         power_domains->init_wakeref =
1950                 intel_display_power_get(i915, POWER_DOMAIN_INIT);
1951
1952         /* Disable power support if the user asked so. */
1953         if (!i915->display.params.disable_power_well) {
1954                 drm_WARN_ON(&i915->drm, power_domains->disable_wakeref);
1955                 i915->display.power.domains.disable_wakeref = intel_display_power_get(i915,
1956                                                                                       POWER_DOMAIN_INIT);
1957         }
1958         intel_power_domains_sync_hw(i915);
1959
1960         power_domains->initializing = false;
1961 }
1962
1963 /**
1964  * intel_power_domains_driver_remove - deinitialize hw power domain state
1965  * @i915: i915 device instance
1966  *
1967  * De-initializes the display power domain HW state. It also ensures that the
1968  * device stays powered up so that the driver can be reloaded.
1969  *
1970  * It must be called with power domains already disabled (after a call to
1971  * intel_power_domains_disable()) and must be paired with
1972  * intel_power_domains_init_hw().
1973  */
1974 void intel_power_domains_driver_remove(struct drm_i915_private *i915)
1975 {
1976         intel_wakeref_t wakeref __maybe_unused =
1977                 fetch_and_zero(&i915->display.power.domains.init_wakeref);
1978
1979         /* Remove the refcount we took to keep power well support disabled. */
1980         if (!i915->display.params.disable_power_well)
1981                 intel_display_power_put(i915, POWER_DOMAIN_INIT,
1982                                         fetch_and_zero(&i915->display.power.domains.disable_wakeref));
1983
1984         intel_display_power_flush_work_sync(i915);
1985
1986         intel_power_domains_verify_state(i915);
1987
1988         /* Keep the power well enabled, but cancel its rpm wakeref. */
1989         intel_runtime_pm_put(&i915->runtime_pm, wakeref);
1990 }
1991
1992 /**
1993  * intel_power_domains_sanitize_state - sanitize power domains state
1994  * @i915: i915 device instance
1995  *
1996  * Sanitize the power domains state during driver loading and system resume.
1997  * The function will disable all display power wells that BIOS has enabled
1998  * without a user for it (any user for a power well has taken a reference
1999  * on it by the time this function is called, after the state of all the
2000  * pipe, encoder, etc. HW resources have been sanitized).
2001  */
2002 void intel_power_domains_sanitize_state(struct drm_i915_private *i915)
2003 {
2004         struct i915_power_domains *power_domains = &i915->display.power.domains;
2005         struct i915_power_well *power_well;
2006
2007         mutex_lock(&power_domains->lock);
2008
2009         for_each_power_well_reverse(i915, power_well) {
2010                 if (power_well->desc->always_on || power_well->count ||
2011                     !intel_power_well_is_enabled(i915, power_well))
2012                         continue;
2013
2014                 drm_dbg_kms(&i915->drm,
2015                             "BIOS left unused %s power well enabled, disabling it\n",
2016                             intel_power_well_name(power_well));
2017                 intel_power_well_disable(i915, power_well);
2018         }
2019
2020         mutex_unlock(&power_domains->lock);
2021 }
2022
2023 /**
2024  * intel_power_domains_enable - enable toggling of display power wells
2025  * @i915: i915 device instance
2026  *
2027  * Enable the ondemand enabling/disabling of the display power wells. Note that
2028  * power wells not belonging to POWER_DOMAIN_INIT are allowed to be toggled
2029  * only at specific points of the display modeset sequence, thus they are not
2030  * affected by the intel_power_domains_enable()/disable() calls. The purpose
2031  * of these function is to keep the rest of power wells enabled until the end
2032  * of display HW readout (which will acquire the power references reflecting
2033  * the current HW state).
2034  */
2035 void intel_power_domains_enable(struct drm_i915_private *i915)
2036 {
2037         intel_wakeref_t wakeref __maybe_unused =
2038                 fetch_and_zero(&i915->display.power.domains.init_wakeref);
2039
2040         intel_display_power_put(i915, POWER_DOMAIN_INIT, wakeref);
2041         intel_power_domains_verify_state(i915);
2042 }
2043
2044 /**
2045  * intel_power_domains_disable - disable toggling of display power wells
2046  * @i915: i915 device instance
2047  *
2048  * Disable the ondemand enabling/disabling of the display power wells. See
2049  * intel_power_domains_enable() for which power wells this call controls.
2050  */
2051 void intel_power_domains_disable(struct drm_i915_private *i915)
2052 {
2053         struct i915_power_domains *power_domains = &i915->display.power.domains;
2054
2055         drm_WARN_ON(&i915->drm, power_domains->init_wakeref);
2056         power_domains->init_wakeref =
2057                 intel_display_power_get(i915, POWER_DOMAIN_INIT);
2058
2059         intel_power_domains_verify_state(i915);
2060 }
2061
2062 /**
2063  * intel_power_domains_suspend - suspend power domain state
2064  * @i915: i915 device instance
2065  * @s2idle: specifies whether we go to idle, or deeper sleep
2066  *
2067  * This function prepares the hardware power domain state before entering
2068  * system suspend.
2069  *
2070  * It must be called with power domains already disabled (after a call to
2071  * intel_power_domains_disable()) and paired with intel_power_domains_resume().
2072  */
2073 void intel_power_domains_suspend(struct drm_i915_private *i915, bool s2idle)
2074 {
2075         struct i915_power_domains *power_domains = &i915->display.power.domains;
2076         intel_wakeref_t wakeref __maybe_unused =
2077                 fetch_and_zero(&power_domains->init_wakeref);
2078
2079         intel_display_power_put(i915, POWER_DOMAIN_INIT, wakeref);
2080
2081         /*
2082          * In case of suspend-to-idle (aka S0ix) on a DMC platform without DC9
2083          * support don't manually deinit the power domains. This also means the
2084          * DMC firmware will stay active, it will power down any HW
2085          * resources as required and also enable deeper system power states
2086          * that would be blocked if the firmware was inactive.
2087          */
2088         if (!(power_domains->allowed_dc_mask & DC_STATE_EN_DC9) && s2idle &&
2089             intel_dmc_has_payload(i915)) {
2090                 intel_display_power_flush_work(i915);
2091                 intel_power_domains_verify_state(i915);
2092                 return;
2093         }
2094
2095         /*
2096          * Even if power well support was disabled we still want to disable
2097          * power wells if power domains must be deinitialized for suspend.
2098          */
2099         if (!i915->display.params.disable_power_well)
2100                 intel_display_power_put(i915, POWER_DOMAIN_INIT,
2101                                         fetch_and_zero(&i915->display.power.domains.disable_wakeref));
2102
2103         intel_display_power_flush_work(i915);
2104         intel_power_domains_verify_state(i915);
2105
2106         if (DISPLAY_VER(i915) >= 11)
2107                 icl_display_core_uninit(i915);
2108         else if (IS_GEMINILAKE(i915) || IS_BROXTON(i915))
2109                 bxt_display_core_uninit(i915);
2110         else if (DISPLAY_VER(i915) == 9)
2111                 skl_display_core_uninit(i915);
2112
2113         power_domains->display_core_suspended = true;
2114 }
2115
2116 /**
2117  * intel_power_domains_resume - resume power domain state
2118  * @i915: i915 device instance
2119  *
2120  * This function resume the hardware power domain state during system resume.
2121  *
2122  * It will return with power domain support disabled (to be enabled later by
2123  * intel_power_domains_enable()) and must be paired with
2124  * intel_power_domains_suspend().
2125  */
2126 void intel_power_domains_resume(struct drm_i915_private *i915)
2127 {
2128         struct i915_power_domains *power_domains = &i915->display.power.domains;
2129
2130         if (power_domains->display_core_suspended) {
2131                 intel_power_domains_init_hw(i915, true);
2132                 power_domains->display_core_suspended = false;
2133         } else {
2134                 drm_WARN_ON(&i915->drm, power_domains->init_wakeref);
2135                 power_domains->init_wakeref =
2136                         intel_display_power_get(i915, POWER_DOMAIN_INIT);
2137         }
2138
2139         intel_power_domains_verify_state(i915);
2140 }
2141
2142 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
2143
2144 static void intel_power_domains_dump_info(struct drm_i915_private *i915)
2145 {
2146         struct i915_power_domains *power_domains = &i915->display.power.domains;
2147         struct i915_power_well *power_well;
2148
2149         for_each_power_well(i915, power_well) {
2150                 enum intel_display_power_domain domain;
2151
2152                 drm_dbg(&i915->drm, "%-25s %d\n",
2153                         intel_power_well_name(power_well), intel_power_well_refcount(power_well));
2154
2155                 for_each_power_domain(domain, intel_power_well_domains(power_well))
2156                         drm_dbg(&i915->drm, "  %-23s %d\n",
2157                                 intel_display_power_domain_str(domain),
2158                                 power_domains->domain_use_count[domain]);
2159         }
2160 }
2161
2162 /**
2163  * intel_power_domains_verify_state - verify the HW/SW state for all power wells
2164  * @i915: i915 device instance
2165  *
2166  * Verify if the reference count of each power well matches its HW enabled
2167  * state and the total refcount of the domains it belongs to. This must be
2168  * called after modeset HW state sanitization, which is responsible for
2169  * acquiring reference counts for any power wells in use and disabling the
2170  * ones left on by BIOS but not required by any active output.
2171  */
2172 static void intel_power_domains_verify_state(struct drm_i915_private *i915)
2173 {
2174         struct i915_power_domains *power_domains = &i915->display.power.domains;
2175         struct i915_power_well *power_well;
2176         bool dump_domain_info;
2177
2178         mutex_lock(&power_domains->lock);
2179
2180         verify_async_put_domains_state(power_domains);
2181
2182         dump_domain_info = false;
2183         for_each_power_well(i915, power_well) {
2184                 enum intel_display_power_domain domain;
2185                 int domains_count;
2186                 bool enabled;
2187
2188                 enabled = intel_power_well_is_enabled(i915, power_well);
2189                 if ((intel_power_well_refcount(power_well) ||
2190                      intel_power_well_is_always_on(power_well)) !=
2191                     enabled)
2192                         drm_err(&i915->drm,
2193                                 "power well %s state mismatch (refcount %d/enabled %d)",
2194                                 intel_power_well_name(power_well),
2195                                 intel_power_well_refcount(power_well), enabled);
2196
2197                 domains_count = 0;
2198                 for_each_power_domain(domain, intel_power_well_domains(power_well))
2199                         domains_count += power_domains->domain_use_count[domain];
2200
2201                 if (intel_power_well_refcount(power_well) != domains_count) {
2202                         drm_err(&i915->drm,
2203                                 "power well %s refcount/domain refcount mismatch "
2204                                 "(refcount %d/domains refcount %d)\n",
2205                                 intel_power_well_name(power_well),
2206                                 intel_power_well_refcount(power_well),
2207                                 domains_count);
2208                         dump_domain_info = true;
2209                 }
2210         }
2211
2212         if (dump_domain_info) {
2213                 static bool dumped;
2214
2215                 if (!dumped) {
2216                         intel_power_domains_dump_info(i915);
2217                         dumped = true;
2218                 }
2219         }
2220
2221         mutex_unlock(&power_domains->lock);
2222 }
2223
2224 #else
2225
2226 static void intel_power_domains_verify_state(struct drm_i915_private *i915)
2227 {
2228 }
2229
2230 #endif
2231
2232 void intel_display_power_suspend_late(struct drm_i915_private *i915)
2233 {
2234         if (DISPLAY_VER(i915) >= 11 || IS_GEMINILAKE(i915) ||
2235             IS_BROXTON(i915)) {
2236                 bxt_enable_dc9(i915);
2237         } else if (IS_HASWELL(i915) || IS_BROADWELL(i915)) {
2238                 hsw_enable_pc8(i915);
2239         }
2240
2241         /* Tweaked Wa_14010685332:cnp,icp,jsp,mcc,tgp,adp */
2242         if (INTEL_PCH_TYPE(i915) >= PCH_CNP && INTEL_PCH_TYPE(i915) < PCH_DG1)
2243                 intel_de_rmw(i915, SOUTH_CHICKEN1, SBCLK_RUN_REFCLK_DIS, SBCLK_RUN_REFCLK_DIS);
2244 }
2245
2246 void intel_display_power_resume_early(struct drm_i915_private *i915)
2247 {
2248         if (DISPLAY_VER(i915) >= 11 || IS_GEMINILAKE(i915) ||
2249             IS_BROXTON(i915)) {
2250                 gen9_sanitize_dc_state(i915);
2251                 bxt_disable_dc9(i915);
2252         } else if (IS_HASWELL(i915) || IS_BROADWELL(i915)) {
2253                 hsw_disable_pc8(i915);
2254         }
2255
2256         /* Tweaked Wa_14010685332:cnp,icp,jsp,mcc,tgp,adp */
2257         if (INTEL_PCH_TYPE(i915) >= PCH_CNP && INTEL_PCH_TYPE(i915) < PCH_DG1)
2258                 intel_de_rmw(i915, SOUTH_CHICKEN1, SBCLK_RUN_REFCLK_DIS, 0);
2259 }
2260
2261 void intel_display_power_suspend(struct drm_i915_private *i915)
2262 {
2263         if (DISPLAY_VER(i915) >= 11) {
2264                 icl_display_core_uninit(i915);
2265                 bxt_enable_dc9(i915);
2266         } else if (IS_GEMINILAKE(i915) || IS_BROXTON(i915)) {
2267                 bxt_display_core_uninit(i915);
2268                 bxt_enable_dc9(i915);
2269         } else if (IS_HASWELL(i915) || IS_BROADWELL(i915)) {
2270                 hsw_enable_pc8(i915);
2271         }
2272 }
2273
2274 void intel_display_power_resume(struct drm_i915_private *i915)
2275 {
2276         struct i915_power_domains *power_domains = &i915->display.power.domains;
2277
2278         if (DISPLAY_VER(i915) >= 11) {
2279                 bxt_disable_dc9(i915);
2280                 icl_display_core_init(i915, true);
2281                 if (intel_dmc_has_payload(i915)) {
2282                         if (power_domains->allowed_dc_mask & DC_STATE_EN_UPTO_DC6)
2283                                 skl_enable_dc6(i915);
2284                         else if (power_domains->allowed_dc_mask & DC_STATE_EN_UPTO_DC5)
2285                                 gen9_enable_dc5(i915);
2286                 }
2287         } else if (IS_GEMINILAKE(i915) || IS_BROXTON(i915)) {
2288                 bxt_disable_dc9(i915);
2289                 bxt_display_core_init(i915, true);
2290                 if (intel_dmc_has_payload(i915) &&
2291                     (power_domains->allowed_dc_mask & DC_STATE_EN_UPTO_DC5))
2292                         gen9_enable_dc5(i915);
2293         } else if (IS_HASWELL(i915) || IS_BROADWELL(i915)) {
2294                 hsw_disable_pc8(i915);
2295         }
2296 }
2297
2298 void intel_display_power_debug(struct drm_i915_private *i915, struct seq_file *m)
2299 {
2300         struct i915_power_domains *power_domains = &i915->display.power.domains;
2301         int i;
2302
2303         mutex_lock(&power_domains->lock);
2304
2305         seq_printf(m, "%-25s %s\n", "Power well/domain", "Use count");
2306         for (i = 0; i < power_domains->power_well_count; i++) {
2307                 struct i915_power_well *power_well;
2308                 enum intel_display_power_domain power_domain;
2309
2310                 power_well = &power_domains->power_wells[i];
2311                 seq_printf(m, "%-25s %d\n", intel_power_well_name(power_well),
2312                            intel_power_well_refcount(power_well));
2313
2314                 for_each_power_domain(power_domain, intel_power_well_domains(power_well))
2315                         seq_printf(m, "  %-23s %d\n",
2316                                    intel_display_power_domain_str(power_domain),
2317                                    power_domains->domain_use_count[power_domain]);
2318         }
2319
2320         mutex_unlock(&power_domains->lock);
2321 }
2322
2323 struct intel_ddi_port_domains {
2324         enum port port_start;
2325         enum port port_end;
2326         enum aux_ch aux_ch_start;
2327         enum aux_ch aux_ch_end;
2328
2329         enum intel_display_power_domain ddi_lanes;
2330         enum intel_display_power_domain ddi_io;
2331         enum intel_display_power_domain aux_io;
2332         enum intel_display_power_domain aux_legacy_usbc;
2333         enum intel_display_power_domain aux_tbt;
2334 };
2335
2336 static const struct intel_ddi_port_domains
2337 i9xx_port_domains[] = {
2338         {
2339                 .port_start = PORT_A,
2340                 .port_end = PORT_F,
2341                 .aux_ch_start = AUX_CH_A,
2342                 .aux_ch_end = AUX_CH_F,
2343
2344                 .ddi_lanes = POWER_DOMAIN_PORT_DDI_LANES_A,
2345                 .ddi_io = POWER_DOMAIN_PORT_DDI_IO_A,
2346                 .aux_io = POWER_DOMAIN_AUX_IO_A,
2347                 .aux_legacy_usbc = POWER_DOMAIN_AUX_A,
2348                 .aux_tbt = POWER_DOMAIN_INVALID,
2349         },
2350 };
2351
2352 static const struct intel_ddi_port_domains
2353 d11_port_domains[] = {
2354         {
2355                 .port_start = PORT_A,
2356                 .port_end = PORT_B,
2357                 .aux_ch_start = AUX_CH_A,
2358                 .aux_ch_end = AUX_CH_B,
2359
2360                 .ddi_lanes = POWER_DOMAIN_PORT_DDI_LANES_A,
2361                 .ddi_io = POWER_DOMAIN_PORT_DDI_IO_A,
2362                 .aux_io = POWER_DOMAIN_AUX_IO_A,
2363                 .aux_legacy_usbc = POWER_DOMAIN_AUX_A,
2364                 .aux_tbt = POWER_DOMAIN_INVALID,
2365         }, {
2366                 .port_start = PORT_C,
2367                 .port_end = PORT_F,
2368                 .aux_ch_start = AUX_CH_C,
2369                 .aux_ch_end = AUX_CH_F,
2370
2371                 .ddi_lanes = POWER_DOMAIN_PORT_DDI_LANES_C,
2372                 .ddi_io = POWER_DOMAIN_PORT_DDI_IO_C,
2373                 .aux_io = POWER_DOMAIN_AUX_IO_C,
2374                 .aux_legacy_usbc = POWER_DOMAIN_AUX_C,
2375                 .aux_tbt = POWER_DOMAIN_AUX_TBT1,
2376         },
2377 };
2378
2379 static const struct intel_ddi_port_domains
2380 d12_port_domains[] = {
2381         {
2382                 .port_start = PORT_A,
2383                 .port_end = PORT_C,
2384                 .aux_ch_start = AUX_CH_A,
2385                 .aux_ch_end = AUX_CH_C,
2386
2387                 .ddi_lanes = POWER_DOMAIN_PORT_DDI_LANES_A,
2388                 .ddi_io = POWER_DOMAIN_PORT_DDI_IO_A,
2389                 .aux_io = POWER_DOMAIN_AUX_IO_A,
2390                 .aux_legacy_usbc = POWER_DOMAIN_AUX_A,
2391                 .aux_tbt = POWER_DOMAIN_INVALID,
2392         }, {
2393                 .port_start = PORT_TC1,
2394                 .port_end = PORT_TC6,
2395                 .aux_ch_start = AUX_CH_USBC1,
2396                 .aux_ch_end = AUX_CH_USBC6,
2397
2398                 .ddi_lanes = POWER_DOMAIN_PORT_DDI_LANES_TC1,
2399                 .ddi_io = POWER_DOMAIN_PORT_DDI_IO_TC1,
2400                 .aux_io = POWER_DOMAIN_INVALID,
2401                 .aux_legacy_usbc = POWER_DOMAIN_AUX_USBC1,
2402                 .aux_tbt = POWER_DOMAIN_AUX_TBT1,
2403         },
2404 };
2405
2406 static const struct intel_ddi_port_domains
2407 d13_port_domains[] = {
2408         {
2409                 .port_start = PORT_A,
2410                 .port_end = PORT_C,
2411                 .aux_ch_start = AUX_CH_A,
2412                 .aux_ch_end = AUX_CH_C,
2413
2414                 .ddi_lanes = POWER_DOMAIN_PORT_DDI_LANES_A,
2415                 .ddi_io = POWER_DOMAIN_PORT_DDI_IO_A,
2416                 .aux_io = POWER_DOMAIN_AUX_IO_A,
2417                 .aux_legacy_usbc = POWER_DOMAIN_AUX_A,
2418                 .aux_tbt = POWER_DOMAIN_INVALID,
2419         }, {
2420                 .port_start = PORT_TC1,
2421                 .port_end = PORT_TC4,
2422                 .aux_ch_start = AUX_CH_USBC1,
2423                 .aux_ch_end = AUX_CH_USBC4,
2424
2425                 .ddi_lanes = POWER_DOMAIN_PORT_DDI_LANES_TC1,
2426                 .ddi_io = POWER_DOMAIN_PORT_DDI_IO_TC1,
2427                 .aux_io = POWER_DOMAIN_INVALID,
2428                 .aux_legacy_usbc = POWER_DOMAIN_AUX_USBC1,
2429                 .aux_tbt = POWER_DOMAIN_AUX_TBT1,
2430         }, {
2431                 .port_start = PORT_D_XELPD,
2432                 .port_end = PORT_E_XELPD,
2433                 .aux_ch_start = AUX_CH_D_XELPD,
2434                 .aux_ch_end = AUX_CH_E_XELPD,
2435
2436                 .ddi_lanes = POWER_DOMAIN_PORT_DDI_LANES_D,
2437                 .ddi_io = POWER_DOMAIN_PORT_DDI_IO_D,
2438                 .aux_io = POWER_DOMAIN_AUX_IO_D,
2439                 .aux_legacy_usbc = POWER_DOMAIN_AUX_D,
2440                 .aux_tbt = POWER_DOMAIN_INVALID,
2441         },
2442 };
2443
2444 static void
2445 intel_port_domains_for_platform(struct drm_i915_private *i915,
2446                                 const struct intel_ddi_port_domains **domains,
2447                                 int *domains_size)
2448 {
2449         if (DISPLAY_VER(i915) >= 13) {
2450                 *domains = d13_port_domains;
2451                 *domains_size = ARRAY_SIZE(d13_port_domains);
2452         } else if (DISPLAY_VER(i915) >= 12) {
2453                 *domains = d12_port_domains;
2454                 *domains_size = ARRAY_SIZE(d12_port_domains);
2455         } else if (DISPLAY_VER(i915) >= 11) {
2456                 *domains = d11_port_domains;
2457                 *domains_size = ARRAY_SIZE(d11_port_domains);
2458         } else {
2459                 *domains = i9xx_port_domains;
2460                 *domains_size = ARRAY_SIZE(i9xx_port_domains);
2461         }
2462 }
2463
2464 static const struct intel_ddi_port_domains *
2465 intel_port_domains_for_port(struct drm_i915_private *i915, enum port port)
2466 {
2467         const struct intel_ddi_port_domains *domains;
2468         int domains_size;
2469         int i;
2470
2471         intel_port_domains_for_platform(i915, &domains, &domains_size);
2472         for (i = 0; i < domains_size; i++)
2473                 if (port >= domains[i].port_start && port <= domains[i].port_end)
2474                         return &domains[i];
2475
2476         return NULL;
2477 }
2478
2479 enum intel_display_power_domain
2480 intel_display_power_ddi_io_domain(struct drm_i915_private *i915, enum port port)
2481 {
2482         const struct intel_ddi_port_domains *domains = intel_port_domains_for_port(i915, port);
2483
2484         if (drm_WARN_ON(&i915->drm, !domains || domains->ddi_io == POWER_DOMAIN_INVALID))
2485                 return POWER_DOMAIN_PORT_DDI_IO_A;
2486
2487         return domains->ddi_io + (int)(port - domains->port_start);
2488 }
2489
2490 enum intel_display_power_domain
2491 intel_display_power_ddi_lanes_domain(struct drm_i915_private *i915, enum port port)
2492 {
2493         const struct intel_ddi_port_domains *domains = intel_port_domains_for_port(i915, port);
2494
2495         if (drm_WARN_ON(&i915->drm, !domains || domains->ddi_lanes == POWER_DOMAIN_INVALID))
2496                 return POWER_DOMAIN_PORT_DDI_LANES_A;
2497
2498         return domains->ddi_lanes + (int)(port - domains->port_start);
2499 }
2500
2501 static const struct intel_ddi_port_domains *
2502 intel_port_domains_for_aux_ch(struct drm_i915_private *i915, enum aux_ch aux_ch)
2503 {
2504         const struct intel_ddi_port_domains *domains;
2505         int domains_size;
2506         int i;
2507
2508         intel_port_domains_for_platform(i915, &domains, &domains_size);
2509         for (i = 0; i < domains_size; i++)
2510                 if (aux_ch >= domains[i].aux_ch_start && aux_ch <= domains[i].aux_ch_end)
2511                         return &domains[i];
2512
2513         return NULL;
2514 }
2515
2516 enum intel_display_power_domain
2517 intel_display_power_aux_io_domain(struct drm_i915_private *i915, enum aux_ch aux_ch)
2518 {
2519         const struct intel_ddi_port_domains *domains = intel_port_domains_for_aux_ch(i915, aux_ch);
2520
2521         if (drm_WARN_ON(&i915->drm, !domains || domains->aux_io == POWER_DOMAIN_INVALID))
2522                 return POWER_DOMAIN_AUX_IO_A;
2523
2524         return domains->aux_io + (int)(aux_ch - domains->aux_ch_start);
2525 }
2526
2527 enum intel_display_power_domain
2528 intel_display_power_legacy_aux_domain(struct drm_i915_private *i915, enum aux_ch aux_ch)
2529 {
2530         const struct intel_ddi_port_domains *domains = intel_port_domains_for_aux_ch(i915, aux_ch);
2531
2532         if (drm_WARN_ON(&i915->drm, !domains || domains->aux_legacy_usbc == POWER_DOMAIN_INVALID))
2533                 return POWER_DOMAIN_AUX_A;
2534
2535         return domains->aux_legacy_usbc + (int)(aux_ch - domains->aux_ch_start);
2536 }
2537
2538 enum intel_display_power_domain
2539 intel_display_power_tbt_aux_domain(struct drm_i915_private *i915, enum aux_ch aux_ch)
2540 {
2541         const struct intel_ddi_port_domains *domains = intel_port_domains_for_aux_ch(i915, aux_ch);
2542
2543         if (drm_WARN_ON(&i915->drm, !domains || domains->aux_tbt == POWER_DOMAIN_INVALID))
2544                 return POWER_DOMAIN_AUX_TBT1;
2545
2546         return domains->aux_tbt + (int)(aux_ch - domains->aux_ch_start);
2547 }