drivers/gpu/drm/i915/intel_runtime_pm.c

   1 /*
   2  * Copyright © 2012-2014 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Eugeni Dodonov <eugeni.dodonov@intel.com>
  25  *    Daniel Vetter <daniel.vetter@ffwll.ch>
  26  *
  27  */
  28
  29 #include <linux/pm_runtime.h>
  30 #include <linux/vgaarb.h>
  31
  32 #include "i915_drv.h"
  33 #include "intel_drv.h"
  34
  35 /**
  36  * DOC: runtime pm
  37  *
  38  * The i915 driver supports dynamic enabling and disabling of entire hardware
  39  * blocks at runtime. This is especially important on the display side where
  40  * software is supposed to control many power gates manually on recent hardware,
  41  * since on the GT side a lot of the power management is done by the hardware.
  42  * But even there some manual control at the device level is required.
  43  *
  44  * Since i915 supports a diverse set of platforms with a unified codebase and
  45  * hardware engineers just love to shuffle functionality around between power
  46  * domains there's a sizeable amount of indirection required. This file provides
  47  * generic functions to the driver for grabbing and releasing references for
  48  * abstract power domains. It then maps those to the actual power wells
  49  * present for a given platform.
  50  */
  51
  52 bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv,
  53                                          enum i915_power_well_id power_well_id);
  54
  55 const char *
  56 intel_display_power_domain_str(enum intel_display_power_domain domain)
  57 {
  58         switch (domain) {
  59         case POWER_DOMAIN_PIPE_A:
  60                 return "PIPE_A";
  61         case POWER_DOMAIN_PIPE_B:
  62                 return "PIPE_B";
  63         case POWER_DOMAIN_PIPE_C:
  64                 return "PIPE_C";
  65         case POWER_DOMAIN_PIPE_A_PANEL_FITTER:
  66                 return "PIPE_A_PANEL_FITTER";
  67         case POWER_DOMAIN_PIPE_B_PANEL_FITTER:
  68                 return "PIPE_B_PANEL_FITTER";
  69         case POWER_DOMAIN_PIPE_C_PANEL_FITTER:
  70                 return "PIPE_C_PANEL_FITTER";
  71         case POWER_DOMAIN_TRANSCODER_A:
  72                 return "TRANSCODER_A";
  73         case POWER_DOMAIN_TRANSCODER_B:
  74                 return "TRANSCODER_B";
  75         case POWER_DOMAIN_TRANSCODER_C:
  76                 return "TRANSCODER_C";
  77         case POWER_DOMAIN_TRANSCODER_EDP:
  78                 return "TRANSCODER_EDP";
  79         case POWER_DOMAIN_TRANSCODER_DSI_A:
  80                 return "TRANSCODER_DSI_A";
  81         case POWER_DOMAIN_TRANSCODER_DSI_C:
  82                 return "TRANSCODER_DSI_C";
  83         case POWER_DOMAIN_PORT_DDI_A_LANES:
  84                 return "PORT_DDI_A_LANES";
  85         case POWER_DOMAIN_PORT_DDI_B_LANES:
  86                 return "PORT_DDI_B_LANES";
  87         case POWER_DOMAIN_PORT_DDI_C_LANES:
  88                 return "PORT_DDI_C_LANES";
  89         case POWER_DOMAIN_PORT_DDI_D_LANES:
  90                 return "PORT_DDI_D_LANES";
  91         case POWER_DOMAIN_PORT_DDI_E_LANES:
  92                 return "PORT_DDI_E_LANES";
  93         case POWER_DOMAIN_PORT_DDI_F_LANES:
  94                 return "PORT_DDI_F_LANES";
  95         case POWER_DOMAIN_PORT_DDI_A_IO:
  96                 return "PORT_DDI_A_IO";
  97         case POWER_DOMAIN_PORT_DDI_B_IO:
  98                 return "PORT_DDI_B_IO";
  99         case POWER_DOMAIN_PORT_DDI_C_IO:
 100                 return "PORT_DDI_C_IO";
 101         case POWER_DOMAIN_PORT_DDI_D_IO:
 102                 return "PORT_DDI_D_IO";
 103         case POWER_DOMAIN_PORT_DDI_E_IO:
 104                 return "PORT_DDI_E_IO";
 105         case POWER_DOMAIN_PORT_DDI_F_IO:
 106                 return "PORT_DDI_F_IO";
 107         case POWER_DOMAIN_PORT_DSI:
 108                 return "PORT_DSI";
 109         case POWER_DOMAIN_PORT_CRT:
 110                 return "PORT_CRT";
 111         case POWER_DOMAIN_PORT_OTHER:
 112                 return "PORT_OTHER";
 113         case POWER_DOMAIN_VGA:
 114                 return "VGA";
 115         case POWER_DOMAIN_AUDIO:
 116                 return "AUDIO";
 117         case POWER_DOMAIN_PLLS:
 118                 return "PLLS";
 119         case POWER_DOMAIN_AUX_A:
 120                 return "AUX_A";
 121         case POWER_DOMAIN_AUX_B:
 122                 return "AUX_B";
 123         case POWER_DOMAIN_AUX_C:
 124                 return "AUX_C";
 125         case POWER_DOMAIN_AUX_D:
 126                 return "AUX_D";
 127         case POWER_DOMAIN_AUX_E:
 128                 return "AUX_E";
 129         case POWER_DOMAIN_AUX_F:
 130                 return "AUX_F";
 131         case POWER_DOMAIN_AUX_IO_A:
 132                 return "AUX_IO_A";
 133         case POWER_DOMAIN_AUX_TBT1:
 134                 return "AUX_TBT1";
 135         case POWER_DOMAIN_AUX_TBT2:
 136                 return "AUX_TBT2";
 137         case POWER_DOMAIN_AUX_TBT3:
 138                 return "AUX_TBT3";
 139         case POWER_DOMAIN_AUX_TBT4:
 140                 return "AUX_TBT4";
 141         case POWER_DOMAIN_GMBUS:
 142                 return "GMBUS";
 143         case POWER_DOMAIN_INIT:
 144                 return "INIT";
 145         case POWER_DOMAIN_MODESET:
 146                 return "MODESET";
 147         case POWER_DOMAIN_GT_IRQ:
 148                 return "GT_IRQ";
 149         default:
 150                 MISSING_CASE(domain);
 151                 return "?";
 152         }
 153 }
 154
 155 static void intel_power_well_enable(struct drm_i915_private *dev_priv,
 156                                     struct i915_power_well *power_well)
 157 {
 158         DRM_DEBUG_KMS("enabling %s\n", power_well->desc->name);
 159         power_well->desc->ops->enable(dev_priv, power_well);
 160         power_well->hw_enabled = true;
 161 }
 162
 163 static void intel_power_well_disable(struct drm_i915_private *dev_priv,
 164                                      struct i915_power_well *power_well)
 165 {
 166         DRM_DEBUG_KMS("disabling %s\n", power_well->desc->name);
 167         power_well->hw_enabled = false;
 168         power_well->desc->ops->disable(dev_priv, power_well);
 169 }
 170
 171 static void intel_power_well_get(struct drm_i915_private *dev_priv,
 172                                  struct i915_power_well *power_well)
 173 {
 174         if (!power_well->count++)
 175                 intel_power_well_enable(dev_priv, power_well);
 176 }
 177
 178 static void intel_power_well_put(struct drm_i915_private *dev_priv,
 179                                  struct i915_power_well *power_well)
 180 {
 181         WARN(!power_well->count, "Use count on power well %s is already zero",
 182              power_well->desc->name);
 183
 184         if (!--power_well->count)
 185                 intel_power_well_disable(dev_priv, power_well);
 186 }
 187
 188 /**
 189  * __intel_display_power_is_enabled - unlocked check for a power domain
 190  * @dev_priv: i915 device instance
 191  * @domain: power domain to check
 192  *
 193  * This is the unlocked version of intel_display_power_is_enabled() and should
 194  * only be used from error capture and recovery code where deadlocks are
 195  * possible.
 196  *
 197  * Returns:
 198  * True when the power domain is enabled, false otherwise.
 199  */
 200 bool __intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
 201                                       enum intel_display_power_domain domain)
 202 {
 203         struct i915_power_well *power_well;
 204         bool is_enabled;
 205
 206         if (dev_priv->runtime_pm.suspended)
 207                 return false;
 208
 209         is_enabled = true;
 210
 211         for_each_power_domain_well_rev(dev_priv, power_well, BIT_ULL(domain)) {
 212                 if (power_well->desc->always_on)
 213                         continue;
 214
 215                 if (!power_well->hw_enabled) {
 216                         is_enabled = false;
 217                         break;
 218                 }
 219         }
 220
 221         return is_enabled;
 222 }
 223
 224 /**
 225  * intel_display_power_is_enabled - check for a power domain
 226  * @dev_priv: i915 device instance
 227  * @domain: power domain to check
 228  *
 229  * This function can be used to check the hw power domain state. It is mostly
 230  * used in hardware state readout functions. Everywhere else code should rely
 231  * upon explicit power domain reference counting to ensure that the hardware
 232  * block is powered up before accessing it.
 233  *
 234  * Callers must hold the relevant modesetting locks to ensure that concurrent
 235  * threads can't disable the power well while the caller tries to read a few
 236  * registers.
 237  *
 238  * Returns:
 239  * True when the power domain is enabled, false otherwise.
 240  */
 241 bool intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
 242                                     enum intel_display_power_domain domain)
 243 {
 244         struct i915_power_domains *power_domains;
 245         bool ret;
 246
 247         power_domains = &dev_priv->power_domains;
 248
 249         mutex_lock(&power_domains->lock);
 250         ret = __intel_display_power_is_enabled(dev_priv, domain);
 251         mutex_unlock(&power_domains->lock);
 252
 253         return ret;
 254 }
 255
 256 /*
 257  * Starting with Haswell, we have a "Power Down Well" that can be turned off
 258  * when not needed anymore. We have 4 registers that can request the power well
 259  * to be enabled, and it will only be disabled if none of the registers is
 260  * requesting it to be enabled.
 261  */
 262 static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv,
 263                                        u8 irq_pipe_mask, bool has_vga)
 264 {
 265         struct pci_dev *pdev = dev_priv->drm.pdev;
 266
 267         /*
 268          * After we re-enable the power well, if we touch VGA register 0x3d5
 269          * we'll get unclaimed register interrupts. This stops after we write
 270          * anything to the VGA MSR register. The vgacon module uses this
 271          * register all the time, so if we unbind our driver and, as a
 272          * consequence, bind vgacon, we'll get stuck in an infinite loop at
 273          * console_unlock(). So make here we touch the VGA MSR register, making
 274          * sure vgacon can keep working normally without triggering interrupts
 275          * and error messages.
 276          */
 277         if (has_vga) {
 278                 vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO);
 279                 outb(inb(VGA_MSR_READ), VGA_MSR_WRITE);
 280                 vga_put(pdev, VGA_RSRC_LEGACY_IO);
 281         }
 282
 283         if (irq_pipe_mask)
 284                 gen8_irq_power_well_post_enable(dev_priv, irq_pipe_mask);
 285 }
 286
 287 static void hsw_power_well_pre_disable(struct drm_i915_private *dev_priv,
 288                                        u8 irq_pipe_mask)
 289 {
 290         if (irq_pipe_mask)
 291                 gen8_irq_power_well_pre_disable(dev_priv, irq_pipe_mask);
 292 }
 293
 294
 295 static void hsw_wait_for_power_well_enable(struct drm_i915_private *dev_priv,
 296                                            struct i915_power_well *power_well)
 297 {
 298         const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
 299         int pw_idx = power_well->desc->hsw.idx;
 300
 301         /* Timeout for PW1:10 us, AUX:not specified, other PWs:20 us. */
 302         WARN_ON(intel_wait_for_register(dev_priv,
 303                                         regs->driver,
 304                                         HSW_PWR_WELL_CTL_STATE(pw_idx),
 305                                         HSW_PWR_WELL_CTL_STATE(pw_idx),
 306                                         1));
 307 }
 308
 309 static u32 hsw_power_well_requesters(struct drm_i915_private *dev_priv,
 310                                      const struct i915_power_well_regs *regs,
 311                                      int pw_idx)
 312 {
 313         u32 req_mask = HSW_PWR_WELL_CTL_REQ(pw_idx);
 314         u32 ret;
 315
 316         ret = I915_READ(regs->bios) & req_mask ? 1 : 0;
 317         ret |= I915_READ(regs->driver) & req_mask ? 2 : 0;
 318         if (regs->kvmr.reg)
 319                 ret |= I915_READ(regs->kvmr) & req_mask ? 4 : 0;
 320         ret |= I915_READ(regs->debug) & req_mask ? 8 : 0;
 321
 322         return ret;
 323 }
 324
 325 static void hsw_wait_for_power_well_disable(struct drm_i915_private *dev_priv,
 326                                             struct i915_power_well *power_well)
 327 {
 328         const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
 329         int pw_idx = power_well->desc->hsw.idx;
 330         bool disabled;
 331         u32 reqs;
 332
 333         /*
 334          * Bspec doesn't require waiting for PWs to get disabled, but still do
 335          * this for paranoia. The known cases where a PW will be forced on:
 336          * - a KVMR request on any power well via the KVMR request register
 337          * - a DMC request on PW1 and MISC_IO power wells via the BIOS and
 338          *   DEBUG request registers
 339          * Skip the wait in case any of the request bits are set and print a
 340          * diagnostic message.
 341          */
 342         wait_for((disabled = !(I915_READ(regs->driver) &
 343                                HSW_PWR_WELL_CTL_STATE(pw_idx))) ||
 344                  (reqs = hsw_power_well_requesters(dev_priv, regs, pw_idx)), 1);
 345         if (disabled)
 346                 return;
 347
 348         DRM_DEBUG_KMS("%s forced on (bios:%d driver:%d kvmr:%d debug:%d)\n",
 349                       power_well->desc->name,
 350                       !!(reqs & 1), !!(reqs & 2), !!(reqs & 4), !!(reqs & 8));
 351 }
 352
 353 static void gen9_wait_for_power_well_fuses(struct drm_i915_private *dev_priv,
 354                                            enum skl_power_gate pg)
 355 {
 356         /* Timeout 5us for PG#0, for other PGs 1us */
 357         WARN_ON(intel_wait_for_register(dev_priv, SKL_FUSE_STATUS,
 358                                         SKL_FUSE_PG_DIST_STATUS(pg),
 359                                         SKL_FUSE_PG_DIST_STATUS(pg), 1));
 360 }
 361
 362 static void hsw_power_well_enable(struct drm_i915_private *dev_priv,
 363                                   struct i915_power_well *power_well)
 364 {
 365         const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
 366         int pw_idx = power_well->desc->hsw.idx;
 367         bool wait_fuses = power_well->desc->hsw.has_fuses;
 368         enum skl_power_gate uninitialized_var(pg);
 369         u32 val;
 370
 371         if (wait_fuses) {
 372                 pg = INTEL_GEN(dev_priv) >= 11 ? ICL_PW_CTL_IDX_TO_PG(pw_idx) :
 373                                                  SKL_PW_CTL_IDX_TO_PG(pw_idx);
 374                 /*
 375                  * For PW1 we have to wait both for the PW0/PG0 fuse state
 376                  * before enabling the power well and PW1/PG1's own fuse
 377                  * state after the enabling. For all other power wells with
 378                  * fuses we only have to wait for that PW/PG's fuse state
 379                  * after the enabling.
 380                  */
 381                 if (pg == SKL_PG1)
 382                         gen9_wait_for_power_well_fuses(dev_priv, SKL_PG0);
 383         }
 384
 385         val = I915_READ(regs->driver);
 386         I915_WRITE(regs->driver, val | HSW_PWR_WELL_CTL_REQ(pw_idx));
 387         hsw_wait_for_power_well_enable(dev_priv, power_well);
 388
 389         /* Display WA #1178: cnl */
 390         if (IS_CANNONLAKE(dev_priv) &&
 391             pw_idx >= GLK_PW_CTL_IDX_AUX_B &&
 392             pw_idx <= CNL_PW_CTL_IDX_AUX_F) {
 393                 val = I915_READ(CNL_AUX_ANAOVRD1(pw_idx));
 394                 val |= CNL_AUX_ANAOVRD1_ENABLE | CNL_AUX_ANAOVRD1_LDO_BYPASS;
 395                 I915_WRITE(CNL_AUX_ANAOVRD1(pw_idx), val);
 396         }
 397
 398         if (wait_fuses)
 399                 gen9_wait_for_power_well_fuses(dev_priv, pg);
 400
 401         hsw_power_well_post_enable(dev_priv,
 402                                    power_well->desc->hsw.irq_pipe_mask,
 403                                    power_well->desc->hsw.has_vga);
 404 }
 405
 406 static void hsw_power_well_disable(struct drm_i915_private *dev_priv,
 407                                    struct i915_power_well *power_well)
 408 {
 409         const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
 410         int pw_idx = power_well->desc->hsw.idx;
 411         u32 val;
 412
 413         hsw_power_well_pre_disable(dev_priv,
 414                                    power_well->desc->hsw.irq_pipe_mask);
 415
 416         val = I915_READ(regs->driver);
 417         I915_WRITE(regs->driver, val & ~HSW_PWR_WELL_CTL_REQ(pw_idx));
 418         hsw_wait_for_power_well_disable(dev_priv, power_well);
 419 }
 420
 421 #define ICL_AUX_PW_TO_PORT(pw_idx)      ((pw_idx) - ICL_PW_CTL_IDX_AUX_A)
 422
 423 static void
 424 icl_combo_phy_aux_power_well_enable(struct drm_i915_private *dev_priv,
 425                                     struct i915_power_well *power_well)
 426 {
 427         const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
 428         int pw_idx = power_well->desc->hsw.idx;
 429         enum port port = ICL_AUX_PW_TO_PORT(pw_idx);
 430         u32 val;
 431
 432         val = I915_READ(regs->driver);
 433         I915_WRITE(regs->driver, val | HSW_PWR_WELL_CTL_REQ(pw_idx));
 434
 435         val = I915_READ(ICL_PORT_CL_DW12(port));
 436         I915_WRITE(ICL_PORT_CL_DW12(port), val | ICL_LANE_ENABLE_AUX);
 437
 438         hsw_wait_for_power_well_enable(dev_priv, power_well);
 439 }
 440
 441 static void
 442 icl_combo_phy_aux_power_well_disable(struct drm_i915_private *dev_priv,
 443                                      struct i915_power_well *power_well)
 444 {
 445         const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
 446         int pw_idx = power_well->desc->hsw.idx;
 447         enum port port = ICL_AUX_PW_TO_PORT(pw_idx);
 448         u32 val;
 449
 450         val = I915_READ(ICL_PORT_CL_DW12(port));
 451         I915_WRITE(ICL_PORT_CL_DW12(port), val & ~ICL_LANE_ENABLE_AUX);
 452
 453         val = I915_READ(regs->driver);
 454         I915_WRITE(regs->driver, val & ~HSW_PWR_WELL_CTL_REQ(pw_idx));
 455
 456         hsw_wait_for_power_well_disable(dev_priv, power_well);
 457 }
 458
 459 /*
 460  * We should only use the power well if we explicitly asked the hardware to
 461  * enable it, so check if it's enabled and also check if we've requested it to
 462  * be enabled.
 463  */
 464 static bool hsw_power_well_enabled(struct drm_i915_private *dev_priv,
 465                                    struct i915_power_well *power_well)
 466 {
 467         const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
 468         int pw_idx = power_well->desc->hsw.idx;
 469         u32 mask = HSW_PWR_WELL_CTL_REQ(pw_idx) |
 470                    HSW_PWR_WELL_CTL_STATE(pw_idx);
 471
 472         return (I915_READ(regs->driver) & mask) == mask;
 473 }
 474
 475 static void assert_can_enable_dc9(struct drm_i915_private *dev_priv)
 476 {
 477         WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_DC9),
 478                   "DC9 already programmed to be enabled.\n");
 479         WARN_ONCE(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5,
 480                   "DC5 still not disabled to enable DC9.\n");
 481         WARN_ONCE(I915_READ(HSW_PWR_WELL_CTL2) &
 482                   HSW_PWR_WELL_CTL_REQ(SKL_PW_CTL_IDX_PW_2),
 483                   "Power well 2 on.\n");
 484         WARN_ONCE(intel_irqs_enabled(dev_priv),
 485                   "Interrupts not disabled yet.\n");
 486
 487          /*
 488           * TODO: check for the following to verify the conditions to enter DC9
 489           * state are satisfied:
 490           * 1] Check relevant display engine registers to verify if mode set
 491           * disable sequence was followed.
 492           * 2] Check if display uninitialize sequence is initialized.
 493           */
 494 }
 495
 496 static void assert_can_disable_dc9(struct drm_i915_private *dev_priv)
 497 {
 498         WARN_ONCE(intel_irqs_enabled(dev_priv),
 499                   "Interrupts not disabled yet.\n");
 500         WARN_ONCE(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5,
 501                   "DC5 still not disabled.\n");
 502
 503          /*
 504           * TODO: check for the following to verify DC9 state was indeed
 505           * entered before programming to disable it:
 506           * 1] Check relevant display engine registers to verify if mode
 507           *  set disable sequence was followed.
 508           * 2] Check if display uninitialize sequence is initialized.
 509           */
 510 }
 511
 512 static void gen9_write_dc_state(struct drm_i915_private *dev_priv,
 513                                 u32 state)
 514 {
 515         int rewrites = 0;
 516         int rereads = 0;
 517         u32 v;
 518
 519         I915_WRITE(DC_STATE_EN, state);
 520
 521         /* It has been observed that disabling the dc6 state sometimes
 522          * doesn't stick and dmc keeps returning old value. Make sure
 523          * the write really sticks enough times and also force rewrite until
 524          * we are confident that state is exactly what we want.
 525          */
 526         do  {
 527                 v = I915_READ(DC_STATE_EN);
 528
 529                 if (v != state) {
 530                         I915_WRITE(DC_STATE_EN, state);
 531                         rewrites++;
 532                         rereads = 0;
 533                 } else if (rereads++ > 5) {
 534                         break;
 535                 }
 536
 537         } while (rewrites < 100);
 538
 539         if (v != state)
 540                 DRM_ERROR("Writing dc state to 0x%x failed, now 0x%x\n",
 541                           state, v);
 542
 543         /* Most of the times we need one retry, avoid spam */
 544         if (rewrites > 1)
 545                 DRM_DEBUG_KMS("Rewrote dc state to 0x%x %d times\n",
 546                               state, rewrites);
 547 }
 548
 549 static u32 gen9_dc_mask(struct drm_i915_private *dev_priv)
 550 {
 551         u32 mask;
 552
 553         mask = DC_STATE_EN_UPTO_DC5;
 554         if (IS_GEN9_LP(dev_priv))
 555                 mask |= DC_STATE_EN_DC9;
 556         else
 557                 mask |= DC_STATE_EN_UPTO_DC6;
 558
 559         return mask;
 560 }
 561
 562 void gen9_sanitize_dc_state(struct drm_i915_private *dev_priv)
 563 {
 564         u32 val;
 565
 566         val = I915_READ(DC_STATE_EN) & gen9_dc_mask(dev_priv);
 567
 568         DRM_DEBUG_KMS("Resetting DC state tracking from %02x to %02x\n",
 569                       dev_priv->csr.dc_state, val);
 570         dev_priv->csr.dc_state = val;
 571 }
 572
 573 /**
 574  * gen9_set_dc_state - set target display C power state
 575  * @dev_priv: i915 device instance
 576  * @state: target DC power state
 577  * - DC_STATE_DISABLE
 578  * - DC_STATE_EN_UPTO_DC5
 579  * - DC_STATE_EN_UPTO_DC6
 580  * - DC_STATE_EN_DC9
 581  *
 582  * Signal to DMC firmware/HW the target DC power state passed in @state.
 583  * DMC/HW can turn off individual display clocks and power rails when entering
 584  * a deeper DC power state (higher in number) and turns these back when exiting
 585  * that state to a shallower power state (lower in number). The HW will decide
 586  * when to actually enter a given state on an on-demand basis, for instance
 587  * depending on the active state of display pipes. The state of display
 588  * registers backed by affected power rails are saved/restored as needed.
 589  *
 590  * Based on the above enabling a deeper DC power state is asynchronous wrt.
 591  * enabling it. Disabling a deeper power state is synchronous: for instance
 592  * setting %DC_STATE_DISABLE won't complete until all HW resources are turned
 593  * back on and register state is restored. This is guaranteed by the MMIO write
 594  * to DC_STATE_EN blocking until the state is restored.
 595  */
 596 static void gen9_set_dc_state(struct drm_i915_private *dev_priv, uint32_t state)
 597 {
 598         uint32_t val;
 599         uint32_t mask;
 600
 601         if (WARN_ON_ONCE(state & ~dev_priv->csr.allowed_dc_mask))
 602                 state &= dev_priv->csr.allowed_dc_mask;
 603
 604         val = I915_READ(DC_STATE_EN);
 605         mask = gen9_dc_mask(dev_priv);
 606         DRM_DEBUG_KMS("Setting DC state from %02x to %02x\n",
 607                       val & mask, state);
 608
 609         /* Check if DMC is ignoring our DC state requests */
 610         if ((val & mask) != dev_priv->csr.dc_state)
 611                 DRM_ERROR("DC state mismatch (0x%x -> 0x%x)\n",
 612                           dev_priv->csr.dc_state, val & mask);
 613
 614         val &= ~mask;
 615         val |= state;
 616
 617         gen9_write_dc_state(dev_priv, val);
 618
 619         dev_priv->csr.dc_state = val & mask;
 620 }
 621
 622 void bxt_enable_dc9(struct drm_i915_private *dev_priv)
 623 {
 624         assert_can_enable_dc9(dev_priv);
 625
 626         DRM_DEBUG_KMS("Enabling DC9\n");
 627
 628         intel_power_sequencer_reset(dev_priv);
 629         gen9_set_dc_state(dev_priv, DC_STATE_EN_DC9);
 630 }
 631
 632 void bxt_disable_dc9(struct drm_i915_private *dev_priv)
 633 {
 634         assert_can_disable_dc9(dev_priv);
 635
 636         DRM_DEBUG_KMS("Disabling DC9\n");
 637
 638         gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
 639
 640         intel_pps_unlock_regs_wa(dev_priv);
 641 }
 642
 643 static void assert_csr_loaded(struct drm_i915_private *dev_priv)
 644 {
 645         WARN_ONCE(!I915_READ(CSR_PROGRAM(0)),
 646                   "CSR program storage start is NULL\n");
 647         WARN_ONCE(!I915_READ(CSR_SSP_BASE), "CSR SSP Base Not fine\n");
 648         WARN_ONCE(!I915_READ(CSR_HTP_SKL), "CSR HTP Not fine\n");
 649 }
 650
 651 static struct i915_power_well *
 652 lookup_power_well(struct drm_i915_private *dev_priv,
 653                   enum i915_power_well_id power_well_id)
 654 {
 655         struct i915_power_well *power_well;
 656
 657         for_each_power_well(dev_priv, power_well)
 658                 if (power_well->desc->id == power_well_id)
 659                         return power_well;
 660
 661         /*
 662          * It's not feasible to add error checking code to the callers since
 663          * this condition really shouldn't happen and it doesn't even make sense
 664          * to abort things like display initialization sequences. Just return
 665          * the first power well and hope the WARN gets reported so we can fix
 666          * our driver.
 667          */
 668         WARN(1, "Power well %d not defined for this platform\n", power_well_id);
 669         return &dev_priv->power_domains.power_wells[0];
 670 }
 671
 672 static void assert_can_enable_dc5(struct drm_i915_private *dev_priv)
 673 {
 674         bool pg2_enabled = intel_display_power_well_is_enabled(dev_priv,
 675                                         SKL_DISP_PW_2);
 676
 677         WARN_ONCE(pg2_enabled, "PG2 not disabled to enable DC5.\n");
 678
 679         WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5),
 680                   "DC5 already programmed to be enabled.\n");
 681         assert_rpm_wakelock_held(dev_priv);
 682
 683         assert_csr_loaded(dev_priv);
 684 }
 685
 686 void gen9_enable_dc5(struct drm_i915_private *dev_priv)
 687 {
 688         assert_can_enable_dc5(dev_priv);
 689
 690         DRM_DEBUG_KMS("Enabling DC5\n");
 691
 692         /* Wa Display #1183: skl,kbl,cfl */
 693         if (IS_GEN9_BC(dev_priv))
 694                 I915_WRITE(GEN8_CHICKEN_DCPR_1, I915_READ(GEN8_CHICKEN_DCPR_1) |
 695                            SKL_SELECT_ALTERNATE_DC_EXIT);
 696
 697         gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC5);
 698 }
 699
 700 static void assert_can_enable_dc6(struct drm_i915_private *dev_priv)
 701 {
 702         WARN_ONCE(I915_READ(UTIL_PIN_CTL) & UTIL_PIN_ENABLE,
 703                   "Backlight is not disabled.\n");
 704         WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC6),
 705                   "DC6 already programmed to be enabled.\n");
 706
 707         assert_csr_loaded(dev_priv);
 708 }
 709
 710 static void skl_enable_dc6(struct drm_i915_private *dev_priv)
 711 {
 712         assert_can_enable_dc6(dev_priv);
 713
 714         DRM_DEBUG_KMS("Enabling DC6\n");
 715
 716         /* Wa Display #1183: skl,kbl,cfl */
 717         if (IS_GEN9_BC(dev_priv))
 718                 I915_WRITE(GEN8_CHICKEN_DCPR_1, I915_READ(GEN8_CHICKEN_DCPR_1) |
 719                            SKL_SELECT_ALTERNATE_DC_EXIT);
 720
 721         gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC6);
 722 }
 723
 724 static void hsw_power_well_sync_hw(struct drm_i915_private *dev_priv,
 725                                    struct i915_power_well *power_well)
 726 {
 727         const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
 728         int pw_idx = power_well->desc->hsw.idx;
 729         u32 mask = HSW_PWR_WELL_CTL_REQ(pw_idx);
 730         u32 bios_req = I915_READ(regs->bios);
 731
 732         /* Take over the request bit if set by BIOS. */
 733         if (bios_req & mask) {
 734                 u32 drv_req = I915_READ(regs->driver);
 735
 736                 if (!(drv_req & mask))
 737                         I915_WRITE(regs->driver, drv_req | mask);
 738                 I915_WRITE(regs->bios, bios_req & ~mask);
 739         }
 740 }
 741
 742 static void bxt_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
 743                                            struct i915_power_well *power_well)
 744 {
 745         bxt_ddi_phy_init(dev_priv, power_well->desc->bxt.phy);
 746 }
 747
 748 static void bxt_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
 749                                             struct i915_power_well *power_well)
 750 {
 751         bxt_ddi_phy_uninit(dev_priv, power_well->desc->bxt.phy);
 752 }
 753
 754 static bool bxt_dpio_cmn_power_well_enabled(struct drm_i915_private *dev_priv,
 755                                             struct i915_power_well *power_well)
 756 {
 757         return bxt_ddi_phy_is_enabled(dev_priv, power_well->desc->bxt.phy);
 758 }
 759
 760 static void bxt_verify_ddi_phy_power_wells(struct drm_i915_private *dev_priv)
 761 {
 762         struct i915_power_well *power_well;
 763
 764         power_well = lookup_power_well(dev_priv, BXT_DISP_PW_DPIO_CMN_A);
 765         if (power_well->count > 0)
 766                 bxt_ddi_phy_verify_state(dev_priv, power_well->desc->bxt.phy);
 767
 768         power_well = lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
 769         if (power_well->count > 0)
 770                 bxt_ddi_phy_verify_state(dev_priv, power_well->desc->bxt.phy);
 771
 772         if (IS_GEMINILAKE(dev_priv)) {
 773                 power_well = lookup_power_well(dev_priv,
 774                                                GLK_DISP_PW_DPIO_CMN_C);
 775                 if (power_well->count > 0)
 776                         bxt_ddi_phy_verify_state(dev_priv,
 777                                                  power_well->desc->bxt.phy);
 778         }
 779 }
 780
 781 static bool gen9_dc_off_power_well_enabled(struct drm_i915_private *dev_priv,
 782                                            struct i915_power_well *power_well)
 783 {
 784         return (I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5_DC6_MASK) == 0;
 785 }
 786
 787 static void gen9_assert_dbuf_enabled(struct drm_i915_private *dev_priv)
 788 {
 789         u32 tmp = I915_READ(DBUF_CTL);
 790
 791         WARN((tmp & (DBUF_POWER_STATE | DBUF_POWER_REQUEST)) !=
 792              (DBUF_POWER_STATE | DBUF_POWER_REQUEST),
 793              "Unexpected DBuf power power state (0x%08x)\n", tmp);
 794 }
 795
 796 static void gen9_dc_off_power_well_enable(struct drm_i915_private *dev_priv,
 797                                           struct i915_power_well *power_well)
 798 {
 799         struct intel_cdclk_state cdclk_state = {};
 800
 801         gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
 802
 803         dev_priv->display.get_cdclk(dev_priv, &cdclk_state);
 804         /* Can't read out voltage_level so can't use intel_cdclk_changed() */
 805         WARN_ON(intel_cdclk_needs_modeset(&dev_priv->cdclk.hw, &cdclk_state));
 806
 807         gen9_assert_dbuf_enabled(dev_priv);
 808
 809         if (IS_GEN9_LP(dev_priv))
 810                 bxt_verify_ddi_phy_power_wells(dev_priv);
 811 }
 812
 813 static void gen9_dc_off_power_well_disable(struct drm_i915_private *dev_priv,
 814                                            struct i915_power_well *power_well)
 815 {
 816         if (!dev_priv->csr.dmc_payload)
 817                 return;
 818
 819         if (dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC6)
 820                 skl_enable_dc6(dev_priv);
 821         else if (dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC5)
 822                 gen9_enable_dc5(dev_priv);
 823 }
 824
 825 static void i9xx_power_well_sync_hw_noop(struct drm_i915_private *dev_priv,
 826                                          struct i915_power_well *power_well)
 827 {
 828 }
 829
 830 static void i9xx_always_on_power_well_noop(struct drm_i915_private *dev_priv,
 831                                            struct i915_power_well *power_well)
 832 {
 833 }
 834
 835 static bool i9xx_always_on_power_well_enabled(struct drm_i915_private *dev_priv,
 836                                              struct i915_power_well *power_well)
 837 {
 838         return true;
 839 }
 840
 841 static void i830_pipes_power_well_enable(struct drm_i915_private *dev_priv,
 842                                          struct i915_power_well *power_well)
 843 {
 844         if ((I915_READ(PIPECONF(PIPE_A)) & PIPECONF_ENABLE) == 0)
 845                 i830_enable_pipe(dev_priv, PIPE_A);
 846         if ((I915_READ(PIPECONF(PIPE_B)) & PIPECONF_ENABLE) == 0)
 847                 i830_enable_pipe(dev_priv, PIPE_B);
 848 }
 849
 850 static void i830_pipes_power_well_disable(struct drm_i915_private *dev_priv,
 851                                           struct i915_power_well *power_well)
 852 {
 853         i830_disable_pipe(dev_priv, PIPE_B);
 854         i830_disable_pipe(dev_priv, PIPE_A);
 855 }
 856
 857 static bool i830_pipes_power_well_enabled(struct drm_i915_private *dev_priv,
 858                                           struct i915_power_well *power_well)
 859 {
 860         return I915_READ(PIPECONF(PIPE_A)) & PIPECONF_ENABLE &&
 861                 I915_READ(PIPECONF(PIPE_B)) & PIPECONF_ENABLE;
 862 }
 863
 864 static void i830_pipes_power_well_sync_hw(struct drm_i915_private *dev_priv,
 865                                           struct i915_power_well *power_well)
 866 {
 867         if (power_well->count > 0)
 868                 i830_pipes_power_well_enable(dev_priv, power_well);
 869         else
 870                 i830_pipes_power_well_disable(dev_priv, power_well);
 871 }
 872
 873 static void vlv_set_power_well(struct drm_i915_private *dev_priv,
 874                                struct i915_power_well *power_well, bool enable)
 875 {
 876         int pw_idx = power_well->desc->vlv.idx;
 877         u32 mask;
 878         u32 state;
 879         u32 ctrl;
 880
 881         mask = PUNIT_PWRGT_MASK(pw_idx);
 882         state = enable ? PUNIT_PWRGT_PWR_ON(pw_idx) :
 883                          PUNIT_PWRGT_PWR_GATE(pw_idx);
 884
 885         mutex_lock(&dev_priv->pcu_lock);
 886
 887 #define COND \
 888         ((vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask) == state)
 889
 890         if (COND)
 891                 goto out;
 892
 893         ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL);
 894         ctrl &= ~mask;
 895         ctrl |= state;
 896         vlv_punit_write(dev_priv, PUNIT_REG_PWRGT_CTRL, ctrl);
 897
 898         if (wait_for(COND, 100))
 899                 DRM_ERROR("timeout setting power well state %08x (%08x)\n",
 900                           state,
 901                           vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL));
 902
 903 #undef COND
 904
 905 out:
 906         mutex_unlock(&dev_priv->pcu_lock);
 907 }
 908
 909 static void vlv_power_well_enable(struct drm_i915_private *dev_priv,
 910                                   struct i915_power_well *power_well)
 911 {
 912         vlv_set_power_well(dev_priv, power_well, true);
 913 }
 914
 915 static void vlv_power_well_disable(struct drm_i915_private *dev_priv,
 916                                    struct i915_power_well *power_well)
 917 {
 918         vlv_set_power_well(dev_priv, power_well, false);
 919 }
 920
 921 static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv,
 922                                    struct i915_power_well *power_well)
 923 {
 924         int pw_idx = power_well->desc->vlv.idx;
 925         bool enabled = false;
 926         u32 mask;
 927         u32 state;
 928         u32 ctrl;
 929
 930         mask = PUNIT_PWRGT_MASK(pw_idx);
 931         ctrl = PUNIT_PWRGT_PWR_ON(pw_idx);
 932
 933         mutex_lock(&dev_priv->pcu_lock);
 934
 935         state = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask;
 936         /*
 937          * We only ever set the power-on and power-gate states, anything
 938          * else is unexpected.
 939          */
 940         WARN_ON(state != PUNIT_PWRGT_PWR_ON(pw_idx) &&
 941                 state != PUNIT_PWRGT_PWR_GATE(pw_idx));
 942         if (state == ctrl)
 943                 enabled = true;
 944
 945         /*
 946          * A transient state at this point would mean some unexpected party
 947          * is poking at the power controls too.
 948          */
 949         ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL) & mask;
 950         WARN_ON(ctrl != state);
 951
 952         mutex_unlock(&dev_priv->pcu_lock);
 953
 954         return enabled;
 955 }
 956
 957 static void vlv_init_display_clock_gating(struct drm_i915_private *dev_priv)
 958 {
 959         u32 val;
 960
 961         /*
 962          * On driver load, a pipe may be active and driving a DSI display.
 963          * Preserve DPOUNIT_CLOCK_GATE_DISABLE to avoid the pipe getting stuck
 964          * (and never recovering) in this case. intel_dsi_post_disable() will
 965          * clear it when we turn off the display.
 966          */
 967         val = I915_READ(DSPCLK_GATE_D);
 968         val &= DPOUNIT_CLOCK_GATE_DISABLE;
 969         val |= VRHUNIT_CLOCK_GATE_DISABLE;
 970         I915_WRITE(DSPCLK_GATE_D, val);
 971
 972         /*
 973          * Disable trickle feed and enable pnd deadline calculation
 974          */
 975         I915_WRITE(MI_ARB_VLV, MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE);
 976         I915_WRITE(CBR1_VLV, 0);
 977
 978         WARN_ON(dev_priv->rawclk_freq == 0);
 979
 980         I915_WRITE(RAWCLK_FREQ_VLV,
 981                    DIV_ROUND_CLOSEST(dev_priv->rawclk_freq, 1000));
 982 }
 983
 984 static void vlv_display_power_well_init(struct drm_i915_private *dev_priv)
 985 {
 986         struct intel_encoder *encoder;
 987         enum pipe pipe;
 988
 989         /*
 990          * Enable the CRI clock source so we can get at the
 991          * display and the reference clock for VGA
 992          * hotplug / manual detection. Supposedly DSI also
 993          * needs the ref clock up and running.
 994          *
 995          * CHV DPLL B/C have some issues if VGA mode is enabled.
 996          */
 997         for_each_pipe(dev_priv, pipe) {
 998                 u32 val = I915_READ(DPLL(pipe));
 999
1000                 val |= DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
1001                 if (pipe != PIPE_A)
1002                         val |= DPLL_INTEGRATED_CRI_CLK_VLV;
1003
1004                 I915_WRITE(DPLL(pipe), val);
1005         }
1006
1007         vlv_init_display_clock_gating(dev_priv);
1008
1009         spin_lock_irq(&dev_priv->irq_lock);
1010         valleyview_enable_display_irqs(dev_priv);
1011         spin_unlock_irq(&dev_priv->irq_lock);
1012
1013         /*
1014          * During driver initialization/resume we can avoid restoring the
1015          * part of the HW/SW state that will be inited anyway explicitly.
1016          */
1017         if (dev_priv->power_domains.initializing)
1018                 return;
1019
1020         intel_hpd_init(dev_priv);
1021
1022         /* Re-enable the ADPA, if we have one */
1023         for_each_intel_encoder(&dev_priv->drm, encoder) {
1024                 if (encoder->type == INTEL_OUTPUT_ANALOG)
1025                         intel_crt_reset(&encoder->base);
1026         }
1027
1028         i915_redisable_vga_power_on(dev_priv);
1029
1030         intel_pps_unlock_regs_wa(dev_priv);
1031 }
1032
1033 static void vlv_display_power_well_deinit(struct drm_i915_private *dev_priv)
1034 {
1035         spin_lock_irq(&dev_priv->irq_lock);
1036         valleyview_disable_display_irqs(dev_priv);
1037         spin_unlock_irq(&dev_priv->irq_lock);
1038
1039         /* make sure we're done processing display irqs */
1040         synchronize_irq(dev_priv->drm.irq);
1041
1042         intel_power_sequencer_reset(dev_priv);
1043
1044         /* Prevent us from re-enabling polling on accident in late suspend */
1045         if (!dev_priv->drm.dev->power.is_suspended)
1046                 intel_hpd_poll_init(dev_priv);
1047 }
1048
1049 static void vlv_display_power_well_enable(struct drm_i915_private *dev_priv,
1050                                           struct i915_power_well *power_well)
1051 {
1052         vlv_set_power_well(dev_priv, power_well, true);
1053
1054         vlv_display_power_well_init(dev_priv);
1055 }
1056
1057 static void vlv_display_power_well_disable(struct drm_i915_private *dev_priv,
1058                                            struct i915_power_well *power_well)
1059 {
1060         vlv_display_power_well_deinit(dev_priv);
1061
1062         vlv_set_power_well(dev_priv, power_well, false);
1063 }
1064
1065 static void vlv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
1066                                            struct i915_power_well *power_well)
1067 {
1068         /* since ref/cri clock was enabled */
1069         udelay(1); /* >10ns for cmnreset, >0ns for sidereset */
1070
1071         vlv_set_power_well(dev_priv, power_well, true);
1072
1073         /*
1074          * From VLV2A0_DP_eDP_DPIO_driver_vbios_notes_10.docx -
1075          *  6.  De-assert cmn_reset/side_reset. Same as VLV X0.
1076          *   a. GUnit 0x2110 bit[0] set to 1 (def 0)
1077          *   b. The other bits such as sfr settings / modesel may all
1078          *      be set to 0.
1079          *
1080          * This should only be done on init and resume from S3 with
1081          * both PLLs disabled, or we risk losing DPIO and PLL
1082          * synchronization.
1083          */
1084         I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) | DPIO_CMNRST);
1085 }
1086
1087 static void vlv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
1088                                             struct i915_power_well *power_well)
1089 {
1090         enum pipe pipe;
1091
1092         for_each_pipe(dev_priv, pipe)
1093                 assert_pll_disabled(dev_priv, pipe);
1094
1095         /* Assert common reset */
1096         I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) & ~DPIO_CMNRST);
1097
1098         vlv_set_power_well(dev_priv, power_well, false);
1099 }
1100
1101 #define POWER_DOMAIN_MASK (GENMASK_ULL(POWER_DOMAIN_NUM - 1, 0))
1102
1103 #define BITS_SET(val, bits) (((val) & (bits)) == (bits))
1104
1105 static void assert_chv_phy_status(struct drm_i915_private *dev_priv)
1106 {
1107         struct i915_power_well *cmn_bc =
1108                 lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
1109         struct i915_power_well *cmn_d =
1110                 lookup_power_well(dev_priv, CHV_DISP_PW_DPIO_CMN_D);
1111         u32 phy_control = dev_priv->chv_phy_control;
1112         u32 phy_status = 0;
1113         u32 phy_status_mask = 0xffffffff;
1114
1115         /*
1116          * The BIOS can leave the PHY is some weird state
1117          * where it doesn't fully power down some parts.
1118          * Disable the asserts until the PHY has been fully
1119          * reset (ie. the power well has been disabled at
1120          * least once).
1121          */
1122         if (!dev_priv->chv_phy_assert[DPIO_PHY0])
1123                 phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0) |
1124                                      PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0) |
1125                                      PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1) |
1126                                      PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1) |
1127                                      PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0) |
1128                                      PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1));
1129
1130         if (!dev_priv->chv_phy_assert[DPIO_PHY1])
1131                 phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0) |
1132                                      PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0) |
1133                                      PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1));
1134
1135         if (cmn_bc->desc->ops->is_enabled(dev_priv, cmn_bc)) {
1136                 phy_status |= PHY_POWERGOOD(DPIO_PHY0);
1137
1138                 /* this assumes override is only used to enable lanes */
1139                 if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0)) == 0)
1140                         phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0);
1141
1142                 if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1)) == 0)
1143                         phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1);
1144
1145                 /* CL1 is on whenever anything is on in either channel */
1146                 if (BITS_SET(phy_control,
1147                              PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0) |
1148                              PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1)))
1149                         phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0);
1150
1151                 /*
1152                  * The DPLLB check accounts for the pipe B + port A usage
1153                  * with CL2 powered up but all the lanes in the second channel
1154                  * powered down.
1155                  */
1156                 if (BITS_SET(phy_control,
1157                              PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1)) &&
1158                     (I915_READ(DPLL(PIPE_B)) & DPLL_VCO_ENABLE) == 0)
1159                         phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1);
1160
1161                 if (BITS_SET(phy_control,
1162                              PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH0)))
1163                         phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0);
1164                 if (BITS_SET(phy_control,
1165                              PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH0)))
1166                         phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1);
1167
1168                 if (BITS_SET(phy_control,
1169                              PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH1)))
1170                         phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0);
1171                 if (BITS_SET(phy_control,
1172                              PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH1)))
1173                         phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1);
1174         }
1175
1176         if (cmn_d->desc->ops->is_enabled(dev_priv, cmn_d)) {
1177                 phy_status |= PHY_POWERGOOD(DPIO_PHY1);
1178
1179                 /* this assumes override is only used to enable lanes */
1180                 if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0)) == 0)
1181                         phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0);
1182
1183                 if (BITS_SET(phy_control,
1184                              PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0)))
1185                         phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0);
1186
1187                 if (BITS_SET(phy_control,
1188                              PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY1, DPIO_CH0)))
1189                         phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0);
1190                 if (BITS_SET(phy_control,
1191                              PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY1, DPIO_CH0)))
1192                         phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1);
1193         }
1194
1195         phy_status &= phy_status_mask;
1196
1197         /*
1198          * The PHY may be busy with some initial calibration and whatnot,
1199          * so the power state can take a while to actually change.
1200          */
1201         if (intel_wait_for_register(dev_priv,
1202                                     DISPLAY_PHY_STATUS,
1203                                     phy_status_mask,
1204                                     phy_status,
1205                                     10))
1206                 DRM_ERROR("Unexpected PHY_STATUS 0x%08x, expected 0x%08x (PHY_CONTROL=0x%08x)\n",
1207                           I915_READ(DISPLAY_PHY_STATUS) & phy_status_mask,
1208                            phy_status, dev_priv->chv_phy_control);
1209 }
1210
1211 #undef BITS_SET
1212
1213 static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
1214                                            struct i915_power_well *power_well)
1215 {
1216         enum dpio_phy phy;
1217         enum pipe pipe;
1218         uint32_t tmp;
1219
1220         WARN_ON_ONCE(power_well->desc->id != VLV_DISP_PW_DPIO_CMN_BC &&
1221                      power_well->desc->id != CHV_DISP_PW_DPIO_CMN_D);
1222
1223         if (power_well->desc->id == VLV_DISP_PW_DPIO_CMN_BC) {
1224                 pipe = PIPE_A;
1225                 phy = DPIO_PHY0;
1226         } else {
1227                 pipe = PIPE_C;
1228                 phy = DPIO_PHY1;
1229         }
1230
1231         /* since ref/cri clock was enabled */
1232         udelay(1); /* >10ns for cmnreset, >0ns for sidereset */
1233         vlv_set_power_well(dev_priv, power_well, true);
1234
1235         /* Poll for phypwrgood signal */
1236         if (intel_wait_for_register(dev_priv,
1237                                     DISPLAY_PHY_STATUS,
1238                                     PHY_POWERGOOD(phy),
1239                                     PHY_POWERGOOD(phy),
1240                                     1))
1241                 DRM_ERROR("Display PHY %d is not power up\n", phy);
1242
1243         mutex_lock(&dev_priv->sb_lock);
1244
1245         /* Enable dynamic power down */
1246         tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW28);
1247         tmp |= DPIO_DYNPWRDOWNEN_CH0 | DPIO_CL1POWERDOWNEN |
1248                 DPIO_SUS_CLK_CONFIG_GATE_CLKREQ;
1249         vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW28, tmp);
1250
1251         if (power_well->desc->id == VLV_DISP_PW_DPIO_CMN_BC) {
1252                 tmp = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW6_CH1);
1253                 tmp |= DPIO_DYNPWRDOWNEN_CH1;
1254                 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW6_CH1, tmp);
1255         } else {
1256                 /*
1257                  * Force the non-existing CL2 off. BXT does this
1258                  * too, so maybe it saves some power even though
1259                  * CL2 doesn't exist?
1260                  */
1261                 tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW30);
1262                 tmp |= DPIO_CL2_LDOFUSE_PWRENB;
1263                 vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW30, tmp);
1264         }
1265
1266         mutex_unlock(&dev_priv->sb_lock);
1267
1268         dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(phy);
1269         I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
1270
1271         DRM_DEBUG_KMS("Enabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n",
1272                       phy, dev_priv->chv_phy_control);
1273
1274         assert_chv_phy_status(dev_priv);
1275 }
1276
1277 static void chv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
1278                                             struct i915_power_well *power_well)
1279 {
1280         enum dpio_phy phy;
1281
1282         WARN_ON_ONCE(power_well->desc->id != VLV_DISP_PW_DPIO_CMN_BC &&
1283                      power_well->desc->id != CHV_DISP_PW_DPIO_CMN_D);
1284
1285         if (power_well->desc->id == VLV_DISP_PW_DPIO_CMN_BC) {
1286                 phy = DPIO_PHY0;
1287                 assert_pll_disabled(dev_priv, PIPE_A);
1288                 assert_pll_disabled(dev_priv, PIPE_B);
1289         } else {
1290                 phy = DPIO_PHY1;
1291                 assert_pll_disabled(dev_priv, PIPE_C);
1292         }
1293
1294         dev_priv->chv_phy_control &= ~PHY_COM_LANE_RESET_DEASSERT(phy);
1295         I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
1296
1297         vlv_set_power_well(dev_priv, power_well, false);
1298
1299         DRM_DEBUG_KMS("Disabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n",
1300                       phy, dev_priv->chv_phy_control);
1301
1302         /* PHY is fully reset now, so we can enable the PHY state asserts */
1303         dev_priv->chv_phy_assert[phy] = true;
1304
1305         assert_chv_phy_status(dev_priv);
1306 }
1307
1308 static void assert_chv_phy_powergate(struct drm_i915_private *dev_priv, enum dpio_phy phy,
1309                                      enum dpio_channel ch, bool override, unsigned int mask)
1310 {
1311         enum pipe pipe = phy == DPIO_PHY0 ? PIPE_A : PIPE_C;
1312         u32 reg, val, expected, actual;
1313
1314         /*
1315          * The BIOS can leave the PHY is some weird state
1316          * where it doesn't fully power down some parts.
1317          * Disable the asserts until the PHY has been fully
1318          * reset (ie. the power well has been disabled at
1319          * least once).
1320          */
1321         if (!dev_priv->chv_phy_assert[phy])
1322                 return;
1323
1324         if (ch == DPIO_CH0)
1325                 reg = _CHV_CMN_DW0_CH0;
1326         else
1327                 reg = _CHV_CMN_DW6_CH1;
1328
1329         mutex_lock(&dev_priv->sb_lock);
1330         val = vlv_dpio_read(dev_priv, pipe, reg);
1331         mutex_unlock(&dev_priv->sb_lock);
1332
1333         /*
1334          * This assumes !override is only used when the port is disabled.
1335          * All lanes should power down even without the override when
1336          * the port is disabled.
1337          */
1338         if (!override || mask == 0xf) {
1339                 expected = DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN;
1340                 /*
1341                  * If CH1 common lane is not active anymore
1342                  * (eg. for pipe B DPLL) the entire channel will
1343                  * shut down, which causes the common lane registers
1344                  * to read as 0. That means we can't actually check
1345                  * the lane power down status bits, but as the entire
1346                  * register reads as 0 it's a good indication that the
1347                  * channel is indeed entirely powered down.
1348                  */
1349                 if (ch == DPIO_CH1 && val == 0)
1350                         expected = 0;
1351         } else if (mask != 0x0) {
1352                 expected = DPIO_ANYDL_POWERDOWN;
1353         } else {
1354                 expected = 0;
1355         }
1356
1357         if (ch == DPIO_CH0)
1358                 actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH0;
1359         else
1360                 actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH1;
1361         actual &= DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN;
1362
1363         WARN(actual != expected,
1364              "Unexpected DPIO lane power down: all %d, any %d. Expected: all %d, any %d. (0x%x = 0x%08x)\n",
1365              !!(actual & DPIO_ALLDL_POWERDOWN), !!(actual & DPIO_ANYDL_POWERDOWN),
1366              !!(expected & DPIO_ALLDL_POWERDOWN), !!(expected & DPIO_ANYDL_POWERDOWN),
1367              reg, val);
1368 }
1369
1370 bool chv_phy_powergate_ch(struct drm_i915_private *dev_priv, enum dpio_phy phy,
1371                           enum dpio_channel ch, bool override)
1372 {
1373         struct i915_power_domains *power_domains = &dev_priv->power_domains;
1374         bool was_override;
1375
1376         mutex_lock(&power_domains->lock);
1377
1378         was_override = dev_priv->chv_phy_control & PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
1379
1380         if (override == was_override)
1381                 goto out;
1382
1383         if (override)
1384                 dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
1385         else
1386                 dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
1387
1388         I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
1389
1390         DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d (DPIO_PHY_CONTROL=0x%08x)\n",
1391                       phy, ch, dev_priv->chv_phy_control);
1392
1393         assert_chv_phy_status(dev_priv);
1394
1395 out:
1396         mutex_unlock(&power_domains->lock);
1397
1398         return was_override;
1399 }
1400
1401 void chv_phy_powergate_lanes(struct intel_encoder *encoder,
1402                              bool override, unsigned int mask)
1403 {
1404         struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1405         struct i915_power_domains *power_domains = &dev_priv->power_domains;
1406         enum dpio_phy phy = vlv_dport_to_phy(enc_to_dig_port(&encoder->base));
1407         enum dpio_channel ch = vlv_dport_to_channel(enc_to_dig_port(&encoder->base));
1408
1409         mutex_lock(&power_domains->lock);
1410
1411         dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD(0xf, phy, ch);
1412         dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD(mask, phy, ch);
1413
1414         if (override)
1415                 dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
1416         else
1417                 dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
1418
1419         I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
1420
1421         DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d lanes 0x%x (PHY_CONTROL=0x%08x)\n",
1422                       phy, ch, mask, dev_priv->chv_phy_control);
1423
1424         assert_chv_phy_status(dev_priv);
1425
1426         assert_chv_phy_powergate(dev_priv, phy, ch, override, mask);
1427
1428         mutex_unlock(&power_domains->lock);
1429 }
1430
1431 static bool chv_pipe_power_well_enabled(struct drm_i915_private *dev_priv,
1432                                         struct i915_power_well *power_well)
1433 {
1434         enum pipe pipe = PIPE_A;
1435         bool enabled;
1436         u32 state, ctrl;
1437
1438         mutex_lock(&dev_priv->pcu_lock);
1439
1440         state = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe);
1441         /*
1442          * We only ever set the power-on and power-gate states, anything
1443          * else is unexpected.
1444          */
1445         WARN_ON(state != DP_SSS_PWR_ON(pipe) && state != DP_SSS_PWR_GATE(pipe));
1446         enabled = state == DP_SSS_PWR_ON(pipe);
1447
1448         /*
1449          * A transient state at this point would mean some unexpected party
1450          * is poking at the power controls too.
1451          */
1452         ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSC_MASK(pipe);
1453         WARN_ON(ctrl << 16 != state);
1454
1455         mutex_unlock(&dev_priv->pcu_lock);
1456
1457         return enabled;
1458 }
1459
1460 static void chv_set_pipe_power_well(struct drm_i915_private *dev_priv,
1461                                     struct i915_power_well *power_well,
1462                                     bool enable)
1463 {
1464         enum pipe pipe = PIPE_A;
1465         u32 state;
1466         u32 ctrl;
1467
1468         state = enable ? DP_SSS_PWR_ON(pipe) : DP_SSS_PWR_GATE(pipe);
1469
1470         mutex_lock(&dev_priv->pcu_lock);
1471
1472 #define COND \
1473         ((vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe)) == state)
1474
1475         if (COND)
1476                 goto out;
1477
1478         ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
1479         ctrl &= ~DP_SSC_MASK(pipe);
1480         ctrl |= enable ? DP_SSC_PWR_ON(pipe) : DP_SSC_PWR_GATE(pipe);
1481         vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, ctrl);
1482
1483         if (wait_for(COND, 100))
1484                 DRM_ERROR("timeout setting power well state %08x (%08x)\n",
1485                           state,
1486                           vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ));
1487
1488 #undef COND
1489
1490 out:
1491         mutex_unlock(&dev_priv->pcu_lock);
1492 }
1493
1494 static void chv_pipe_power_well_enable(struct drm_i915_private *dev_priv,
1495                                        struct i915_power_well *power_well)
1496 {
1497         chv_set_pipe_power_well(dev_priv, power_well, true);
1498
1499         vlv_display_power_well_init(dev_priv);
1500 }
1501
1502 static void chv_pipe_power_well_disable(struct drm_i915_private *dev_priv,
1503                                         struct i915_power_well *power_well)
1504 {
1505         vlv_display_power_well_deinit(dev_priv);
1506
1507         chv_set_pipe_power_well(dev_priv, power_well, false);
1508 }
1509
1510 static void
1511 __intel_display_power_get_domain(struct drm_i915_private *dev_priv,
1512                                  enum intel_display_power_domain domain)
1513 {
1514         struct i915_power_domains *power_domains = &dev_priv->power_domains;
1515         struct i915_power_well *power_well;
1516
1517         for_each_power_domain_well(dev_priv, power_well, BIT_ULL(domain))
1518                 intel_power_well_get(dev_priv, power_well);
1519
1520         power_domains->domain_use_count[domain]++;
1521 }
1522
1523 /**
1524  * intel_display_power_get - grab a power domain reference
1525  * @dev_priv: i915 device instance
1526  * @domain: power domain to reference
1527  *
1528  * This function grabs a power domain reference for @domain and ensures that the
1529  * power domain and all its parents are powered up. Therefore users should only
1530  * grab a reference to the innermost power domain they need.
1531  *
1532  * Any power domain reference obtained by this function must have a symmetric
1533  * call to intel_display_power_put() to release the reference again.
1534  */
1535 void intel_display_power_get(struct drm_i915_private *dev_priv,
1536                              enum intel_display_power_domain domain)
1537 {
1538         struct i915_power_domains *power_domains = &dev_priv->power_domains;
1539
1540         intel_runtime_pm_get(dev_priv);
1541
1542         mutex_lock(&power_domains->lock);
1543
1544         __intel_display_power_get_domain(dev_priv, domain);
1545
1546         mutex_unlock(&power_domains->lock);
1547 }
1548
1549 /**
1550  * intel_display_power_get_if_enabled - grab a reference for an enabled display power domain
1551  * @dev_priv: i915 device instance
1552  * @domain: power domain to reference
1553  *
1554  * This function grabs a power domain reference for @domain and ensures that the
1555  * power domain and all its parents are powered up. Therefore users should only
1556  * grab a reference to the innermost power domain they need.
1557  *
1558  * Any power domain reference obtained by this function must have a symmetric
1559  * call to intel_display_power_put() to release the reference again.
1560  */
1561 bool intel_display_power_get_if_enabled(struct drm_i915_private *dev_priv,
1562                                         enum intel_display_power_domain domain)
1563 {
1564         struct i915_power_domains *power_domains = &dev_priv->power_domains;
1565         bool is_enabled;
1566
1567         if (!intel_runtime_pm_get_if_in_use(dev_priv))
1568                 return false;
1569
1570         mutex_lock(&power_domains->lock);
1571
1572         if (__intel_display_power_is_enabled(dev_priv, domain)) {
1573                 __intel_display_power_get_domain(dev_priv, domain);
1574                 is_enabled = true;
1575         } else {
1576                 is_enabled = false;
1577         }
1578
1579         mutex_unlock(&power_domains->lock);
1580
1581         if (!is_enabled)
1582                 intel_runtime_pm_put(dev_priv);
1583
1584         return is_enabled;
1585 }
1586
1587 /**
1588  * intel_display_power_put - release a power domain reference
1589  * @dev_priv: i915 device instance
1590  * @domain: power domain to reference
1591  *
1592  * This function drops the power domain reference obtained by
1593  * intel_display_power_get() and might power down the corresponding hardware
1594  * block right away if this is the last reference.
1595  */
1596 void intel_display_power_put(struct drm_i915_private *dev_priv,
1597                              enum intel_display_power_domain domain)
1598 {
1599         struct i915_power_domains *power_domains;
1600         struct i915_power_well *power_well;
1601
1602         power_domains = &dev_priv->power_domains;
1603
1604         mutex_lock(&power_domains->lock);
1605
1606         WARN(!power_domains->domain_use_count[domain],
1607              "Use count on domain %s is already zero\n",
1608              intel_display_power_domain_str(domain));
1609         power_domains->domain_use_count[domain]--;
1610
1611         for_each_power_domain_well_rev(dev_priv, power_well, BIT_ULL(domain))
1612                 intel_power_well_put(dev_priv, power_well);
1613
1614         mutex_unlock(&power_domains->lock);
1615
1616         intel_runtime_pm_put(dev_priv);
1617 }
1618
1619 #define I830_PIPES_POWER_DOMAINS (              \
1620         BIT_ULL(POWER_DOMAIN_PIPE_A) |          \
1621         BIT_ULL(POWER_DOMAIN_PIPE_B) |          \
1622         BIT_ULL(POWER_DOMAIN_PIPE_A_PANEL_FITTER) |     \
1623         BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |     \
1624         BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |    \
1625         BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |    \
1626         BIT_ULL(POWER_DOMAIN_INIT))
1627
1628 #define VLV_DISPLAY_POWER_DOMAINS (             \
1629         BIT_ULL(POWER_DOMAIN_PIPE_A) |          \
1630         BIT_ULL(POWER_DOMAIN_PIPE_B) |          \
1631         BIT_ULL(POWER_DOMAIN_PIPE_A_PANEL_FITTER) |     \
1632         BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |     \
1633         BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |    \
1634         BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |    \
1635         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |        \
1636         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |        \
1637         BIT_ULL(POWER_DOMAIN_PORT_DSI) |                \
1638         BIT_ULL(POWER_DOMAIN_PORT_CRT) |                \
1639         BIT_ULL(POWER_DOMAIN_VGA) |                     \
1640         BIT_ULL(POWER_DOMAIN_AUDIO) |           \
1641         BIT_ULL(POWER_DOMAIN_AUX_B) |           \
1642         BIT_ULL(POWER_DOMAIN_AUX_C) |           \
1643         BIT_ULL(POWER_DOMAIN_GMBUS) |           \
1644         BIT_ULL(POWER_DOMAIN_INIT))
1645
1646 #define VLV_DPIO_CMN_BC_POWER_DOMAINS (         \
1647         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |        \
1648         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |        \
1649         BIT_ULL(POWER_DOMAIN_PORT_CRT) |                \
1650         BIT_ULL(POWER_DOMAIN_AUX_B) |           \
1651         BIT_ULL(POWER_DOMAIN_AUX_C) |           \
1652         BIT_ULL(POWER_DOMAIN_INIT))
1653
1654 #define VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS (  \
1655         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |        \
1656         BIT_ULL(POWER_DOMAIN_AUX_B) |           \
1657         BIT_ULL(POWER_DOMAIN_INIT))
1658
1659 #define VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS (  \
1660         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |        \
1661         BIT_ULL(POWER_DOMAIN_AUX_B) |           \
1662         BIT_ULL(POWER_DOMAIN_INIT))
1663
1664 #define VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS (  \
1665         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |        \
1666         BIT_ULL(POWER_DOMAIN_AUX_C) |           \
1667         BIT_ULL(POWER_DOMAIN_INIT))
1668
1669 #define VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS (  \
1670         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |        \
1671         BIT_ULL(POWER_DOMAIN_AUX_C) |           \
1672         BIT_ULL(POWER_DOMAIN_INIT))
1673
1674 #define CHV_DISPLAY_POWER_DOMAINS (             \
1675         BIT_ULL(POWER_DOMAIN_PIPE_A) |          \
1676         BIT_ULL(POWER_DOMAIN_PIPE_B) |          \
1677         BIT_ULL(POWER_DOMAIN_PIPE_C) |          \
1678         BIT_ULL(POWER_DOMAIN_PIPE_A_PANEL_FITTER) |     \
1679         BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |     \
1680         BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) |     \
1681         BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |    \
1682         BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |    \
1683         BIT_ULL(POWER_DOMAIN_TRANSCODER_C) |    \
1684         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |        \
1685         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |        \
1686         BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) |        \
1687         BIT_ULL(POWER_DOMAIN_PORT_DSI) |                \
1688         BIT_ULL(POWER_DOMAIN_VGA) |                     \
1689         BIT_ULL(POWER_DOMAIN_AUDIO) |           \
1690         BIT_ULL(POWER_DOMAIN_AUX_B) |           \
1691         BIT_ULL(POWER_DOMAIN_AUX_C) |           \
1692         BIT_ULL(POWER_DOMAIN_AUX_D) |           \
1693         BIT_ULL(POWER_DOMAIN_GMBUS) |           \
1694         BIT_ULL(POWER_DOMAIN_INIT))
1695
1696 #define CHV_DPIO_CMN_BC_POWER_DOMAINS (         \
1697         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |        \
1698         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |        \
1699         BIT_ULL(POWER_DOMAIN_AUX_B) |           \
1700         BIT_ULL(POWER_DOMAIN_AUX_C) |           \
1701         BIT_ULL(POWER_DOMAIN_INIT))
1702
1703 #define CHV_DPIO_CMN_D_POWER_DOMAINS (          \
1704         BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) |        \
1705         BIT_ULL(POWER_DOMAIN_AUX_D) |           \
1706         BIT_ULL(POWER_DOMAIN_INIT))
1707
1708 #define HSW_DISPLAY_POWER_DOMAINS (                     \
1709         BIT_ULL(POWER_DOMAIN_PIPE_B) |                  \
1710         BIT_ULL(POWER_DOMAIN_PIPE_C) |                  \
1711         BIT_ULL(POWER_DOMAIN_PIPE_A_PANEL_FITTER) |             \
1712         BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |             \
1713         BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) |             \
1714         BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |            \
1715         BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |            \
1716         BIT_ULL(POWER_DOMAIN_TRANSCODER_C) |            \
1717         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |                \
1718         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |                \
1719         BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) |                \
1720         BIT_ULL(POWER_DOMAIN_PORT_CRT) | /* DDI E */    \
1721         BIT_ULL(POWER_DOMAIN_VGA) |                             \
1722         BIT_ULL(POWER_DOMAIN_AUDIO) |                   \
1723         BIT_ULL(POWER_DOMAIN_INIT))
1724
1725 #define BDW_DISPLAY_POWER_DOMAINS (                     \
1726         BIT_ULL(POWER_DOMAIN_PIPE_B) |                  \
1727         BIT_ULL(POWER_DOMAIN_PIPE_C) |                  \
1728         BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |             \
1729         BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) |             \
1730         BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |            \
1731         BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |            \
1732         BIT_ULL(POWER_DOMAIN_TRANSCODER_C) |            \
1733         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |                \
1734         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |                \
1735         BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) |                \
1736         BIT_ULL(POWER_DOMAIN_PORT_CRT) | /* DDI E */    \
1737         BIT_ULL(POWER_DOMAIN_VGA) |                             \
1738         BIT_ULL(POWER_DOMAIN_AUDIO) |                   \
1739         BIT_ULL(POWER_DOMAIN_INIT))
1740
1741 #define SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS (         \
1742         BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |            \
1743         BIT_ULL(POWER_DOMAIN_PIPE_B) |                  \
1744         BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |            \
1745         BIT_ULL(POWER_DOMAIN_PIPE_C) |                  \
1746         BIT_ULL(POWER_DOMAIN_TRANSCODER_C) |            \
1747         BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |             \
1748         BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) |             \
1749         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |                \
1750         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |                \
1751         BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) |                \
1752         BIT_ULL(POWER_DOMAIN_PORT_DDI_E_LANES) |                \
1753         BIT_ULL(POWER_DOMAIN_AUX_B) |                       \
1754         BIT_ULL(POWER_DOMAIN_AUX_C) |                   \
1755         BIT_ULL(POWER_DOMAIN_AUX_D) |                   \
1756         BIT_ULL(POWER_DOMAIN_AUDIO) |                   \
1757         BIT_ULL(POWER_DOMAIN_VGA) |                             \
1758         BIT_ULL(POWER_DOMAIN_INIT))
1759 #define SKL_DISPLAY_DDI_IO_A_E_POWER_DOMAINS (          \
1760         BIT_ULL(POWER_DOMAIN_PORT_DDI_A_IO) |           \
1761         BIT_ULL(POWER_DOMAIN_PORT_DDI_E_IO) |           \
1762         BIT_ULL(POWER_DOMAIN_INIT))
1763 #define SKL_DISPLAY_DDI_IO_B_POWER_DOMAINS (            \
1764         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO) |           \
1765         BIT_ULL(POWER_DOMAIN_INIT))
1766 #define SKL_DISPLAY_DDI_IO_C_POWER_DOMAINS (            \
1767         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO) |           \
1768         BIT_ULL(POWER_DOMAIN_INIT))
1769 #define SKL_DISPLAY_DDI_IO_D_POWER_DOMAINS (            \
1770         BIT_ULL(POWER_DOMAIN_PORT_DDI_D_IO) |           \
1771         BIT_ULL(POWER_DOMAIN_INIT))
1772 #define SKL_DISPLAY_DC_OFF_POWER_DOMAINS (              \
1773         SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS |         \
1774         BIT_ULL(POWER_DOMAIN_GT_IRQ) |                  \
1775         BIT_ULL(POWER_DOMAIN_MODESET) |                 \
1776         BIT_ULL(POWER_DOMAIN_AUX_A) |                   \
1777         BIT_ULL(POWER_DOMAIN_INIT))
1778
1779 #define BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS (         \
1780         BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |            \
1781         BIT_ULL(POWER_DOMAIN_PIPE_B) |                  \
1782         BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |            \
1783         BIT_ULL(POWER_DOMAIN_PIPE_C) |                  \
1784         BIT_ULL(POWER_DOMAIN_TRANSCODER_C) |            \
1785         BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |             \
1786         BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) |             \
1787         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |                \
1788         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |                \
1789         BIT_ULL(POWER_DOMAIN_AUX_B) |                   \
1790         BIT_ULL(POWER_DOMAIN_AUX_C) |                   \
1791         BIT_ULL(POWER_DOMAIN_AUDIO) |                   \
1792         BIT_ULL(POWER_DOMAIN_VGA) |                             \
1793         BIT_ULL(POWER_DOMAIN_INIT))
1794 #define BXT_DISPLAY_DC_OFF_POWER_DOMAINS (              \
1795         BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS |         \
1796         BIT_ULL(POWER_DOMAIN_GT_IRQ) |                  \
1797         BIT_ULL(POWER_DOMAIN_MODESET) |                 \
1798         BIT_ULL(POWER_DOMAIN_AUX_A) |                   \
1799         BIT_ULL(POWER_DOMAIN_GMBUS) |                   \
1800         BIT_ULL(POWER_DOMAIN_INIT))
1801 #define BXT_DPIO_CMN_A_POWER_DOMAINS (                  \
1802         BIT_ULL(POWER_DOMAIN_PORT_DDI_A_LANES) |                \
1803         BIT_ULL(POWER_DOMAIN_AUX_A) |                   \
1804         BIT_ULL(POWER_DOMAIN_INIT))
1805 #define BXT_DPIO_CMN_BC_POWER_DOMAINS (                 \
1806         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |                \
1807         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |                \
1808         BIT_ULL(POWER_DOMAIN_AUX_B) |                   \
1809         BIT_ULL(POWER_DOMAIN_AUX_C) |                   \
1810         BIT_ULL(POWER_DOMAIN_INIT))
1811
1812 #define GLK_DISPLAY_POWERWELL_2_POWER_DOMAINS (         \
1813         BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |            \
1814         BIT_ULL(POWER_DOMAIN_PIPE_B) |                  \
1815         BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |            \
1816         BIT_ULL(POWER_DOMAIN_PIPE_C) |                  \
1817         BIT_ULL(POWER_DOMAIN_TRANSCODER_C) |            \
1818         BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |             \
1819         BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) |             \
1820         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |                \
1821         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |                \
1822         BIT_ULL(POWER_DOMAIN_AUX_B) |                       \
1823         BIT_ULL(POWER_DOMAIN_AUX_C) |                   \
1824         BIT_ULL(POWER_DOMAIN_AUDIO) |                   \
1825         BIT_ULL(POWER_DOMAIN_VGA) |                             \
1826         BIT_ULL(POWER_DOMAIN_INIT))
1827 #define GLK_DISPLAY_DDI_IO_A_POWER_DOMAINS (            \
1828         BIT_ULL(POWER_DOMAIN_PORT_DDI_A_IO))
1829 #define GLK_DISPLAY_DDI_IO_B_POWER_DOMAINS (            \
1830         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO))
1831 #define GLK_DISPLAY_DDI_IO_C_POWER_DOMAINS (            \
1832         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO))
1833 #define GLK_DPIO_CMN_A_POWER_DOMAINS (                  \
1834         BIT_ULL(POWER_DOMAIN_PORT_DDI_A_LANES) |                \
1835         BIT_ULL(POWER_DOMAIN_AUX_A) |                   \
1836         BIT_ULL(POWER_DOMAIN_INIT))
1837 #define GLK_DPIO_CMN_B_POWER_DOMAINS (                  \
1838         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |                \
1839         BIT_ULL(POWER_DOMAIN_AUX_B) |                   \
1840         BIT_ULL(POWER_DOMAIN_INIT))
1841 #define GLK_DPIO_CMN_C_POWER_DOMAINS (                  \
1842         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |                \
1843         BIT_ULL(POWER_DOMAIN_AUX_C) |                   \
1844         BIT_ULL(POWER_DOMAIN_INIT))
1845 #define GLK_DISPLAY_AUX_A_POWER_DOMAINS (               \
1846         BIT_ULL(POWER_DOMAIN_AUX_A) |           \
1847         BIT_ULL(POWER_DOMAIN_AUX_IO_A) |                \
1848         BIT_ULL(POWER_DOMAIN_INIT))
1849 #define GLK_DISPLAY_AUX_B_POWER_DOMAINS (               \
1850         BIT_ULL(POWER_DOMAIN_AUX_B) |           \
1851         BIT_ULL(POWER_DOMAIN_INIT))
1852 #define GLK_DISPLAY_AUX_C_POWER_DOMAINS (               \
1853         BIT_ULL(POWER_DOMAIN_AUX_C) |           \
1854         BIT_ULL(POWER_DOMAIN_INIT))
1855 #define GLK_DISPLAY_DC_OFF_POWER_DOMAINS (              \
1856         GLK_DISPLAY_POWERWELL_2_POWER_DOMAINS |         \
1857         BIT_ULL(POWER_DOMAIN_GT_IRQ) |                  \
1858         BIT_ULL(POWER_DOMAIN_MODESET) |                 \
1859         BIT_ULL(POWER_DOMAIN_AUX_A) |                   \
1860         BIT_ULL(POWER_DOMAIN_GMBUS) |                   \
1861         BIT_ULL(POWER_DOMAIN_INIT))
1862
1863 #define CNL_DISPLAY_POWERWELL_2_POWER_DOMAINS (         \
1864         BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |            \
1865         BIT_ULL(POWER_DOMAIN_PIPE_B) |                  \
1866         BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |            \
1867         BIT_ULL(POWER_DOMAIN_PIPE_C) |                  \
1868         BIT_ULL(POWER_DOMAIN_TRANSCODER_C) |            \
1869         BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |             \
1870         BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) |             \
1871         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |                \
1872         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |                \
1873         BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) |                \
1874         BIT_ULL(POWER_DOMAIN_PORT_DDI_F_LANES) |                \
1875         BIT_ULL(POWER_DOMAIN_AUX_B) |                       \
1876         BIT_ULL(POWER_DOMAIN_AUX_C) |                   \
1877         BIT_ULL(POWER_DOMAIN_AUX_D) |                   \
1878         BIT_ULL(POWER_DOMAIN_AUX_F) |                   \
1879         BIT_ULL(POWER_DOMAIN_AUDIO) |                   \
1880         BIT_ULL(POWER_DOMAIN_VGA) |                             \
1881         BIT_ULL(POWER_DOMAIN_INIT))
1882 #define CNL_DISPLAY_DDI_A_IO_POWER_DOMAINS (            \
1883         BIT_ULL(POWER_DOMAIN_PORT_DDI_A_IO) |           \
1884         BIT_ULL(POWER_DOMAIN_INIT))
1885 #define CNL_DISPLAY_DDI_B_IO_POWER_DOMAINS (            \
1886         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO) |           \
1887         BIT_ULL(POWER_DOMAIN_INIT))
1888 #define CNL_DISPLAY_DDI_C_IO_POWER_DOMAINS (            \
1889         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO) |           \
1890         BIT_ULL(POWER_DOMAIN_INIT))
1891 #define CNL_DISPLAY_DDI_D_IO_POWER_DOMAINS (            \
1892         BIT_ULL(POWER_DOMAIN_PORT_DDI_D_IO) |           \
1893         BIT_ULL(POWER_DOMAIN_INIT))
1894 #define CNL_DISPLAY_AUX_A_POWER_DOMAINS (               \
1895         BIT_ULL(POWER_DOMAIN_AUX_A) |                   \
1896         BIT_ULL(POWER_DOMAIN_AUX_IO_A) |                \
1897         BIT_ULL(POWER_DOMAIN_INIT))
1898 #define CNL_DISPLAY_AUX_B_POWER_DOMAINS (               \
1899         BIT_ULL(POWER_DOMAIN_AUX_B) |                   \
1900         BIT_ULL(POWER_DOMAIN_INIT))
1901 #define CNL_DISPLAY_AUX_C_POWER_DOMAINS (               \
1902         BIT_ULL(POWER_DOMAIN_AUX_C) |                   \
1903         BIT_ULL(POWER_DOMAIN_INIT))
1904 #define CNL_DISPLAY_AUX_D_POWER_DOMAINS (               \
1905         BIT_ULL(POWER_DOMAIN_AUX_D) |                   \
1906         BIT_ULL(POWER_DOMAIN_INIT))
1907 #define CNL_DISPLAY_AUX_F_POWER_DOMAINS (               \
1908         BIT_ULL(POWER_DOMAIN_AUX_F) |                   \
1909         BIT_ULL(POWER_DOMAIN_INIT))
1910 #define CNL_DISPLAY_DDI_F_IO_POWER_DOMAINS (            \
1911         BIT_ULL(POWER_DOMAIN_PORT_DDI_F_IO) |           \
1912         BIT_ULL(POWER_DOMAIN_INIT))
1913 #define CNL_DISPLAY_DC_OFF_POWER_DOMAINS (              \
1914         CNL_DISPLAY_POWERWELL_2_POWER_DOMAINS |         \
1915         BIT_ULL(POWER_DOMAIN_GT_IRQ) |                  \
1916         BIT_ULL(POWER_DOMAIN_MODESET) |                 \
1917         BIT_ULL(POWER_DOMAIN_AUX_A) |                   \
1918         BIT_ULL(POWER_DOMAIN_INIT))
1919
1920 /*
1921  * ICL PW_0/PG_0 domains (HW/DMC control):
1922  * - PCI
1923  * - clocks except port PLL
1924  * - central power except FBC
1925  * - shared functions except pipe interrupts, pipe MBUS, DBUF registers
1926  * ICL PW_1/PG_1 domains (HW/DMC control):
1927  * - DBUF function
1928  * - PIPE_A and its planes, except VGA
1929  * - transcoder EDP + PSR
1930  * - transcoder DSI
1931  * - DDI_A
1932  * - FBC
1933  */
1934 #define ICL_PW_4_POWER_DOMAINS (                        \
1935         BIT_ULL(POWER_DOMAIN_PIPE_C) |                  \
1936         BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) |     \
1937         BIT_ULL(POWER_DOMAIN_INIT))
1938         /* VDSC/joining */
1939 #define ICL_PW_3_POWER_DOMAINS (                        \
1940         ICL_PW_4_POWER_DOMAINS |                        \
1941         BIT_ULL(POWER_DOMAIN_PIPE_B) |                  \
1942         BIT_ULL(POWER_DOMAIN_TRANSCODER_A) |            \
1943         BIT_ULL(POWER_DOMAIN_TRANSCODER_B) |            \
1944         BIT_ULL(POWER_DOMAIN_TRANSCODER_C) |            \
1945         BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) |     \
1946         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) |        \
1947         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO) |           \
1948         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) |        \
1949         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO) |           \
1950         BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) |        \
1951         BIT_ULL(POWER_DOMAIN_PORT_DDI_D_IO) |           \
1952         BIT_ULL(POWER_DOMAIN_PORT_DDI_E_LANES) |        \
1953         BIT_ULL(POWER_DOMAIN_PORT_DDI_E_IO) |           \
1954         BIT_ULL(POWER_DOMAIN_PORT_DDI_F_LANES) |        \
1955         BIT_ULL(POWER_DOMAIN_PORT_DDI_F_IO) |           \
1956         BIT_ULL(POWER_DOMAIN_AUX_B) |                   \
1957         BIT_ULL(POWER_DOMAIN_AUX_C) |                   \
1958         BIT_ULL(POWER_DOMAIN_AUX_D) |                   \
1959         BIT_ULL(POWER_DOMAIN_AUX_E) |                   \
1960         BIT_ULL(POWER_DOMAIN_AUX_F) |                   \
1961         BIT_ULL(POWER_DOMAIN_AUX_TBT1) |                \
1962         BIT_ULL(POWER_DOMAIN_AUX_TBT2) |                \
1963         BIT_ULL(POWER_DOMAIN_AUX_TBT3) |                \
1964         BIT_ULL(POWER_DOMAIN_AUX_TBT4) |                \
1965         BIT_ULL(POWER_DOMAIN_VGA) |                     \
1966         BIT_ULL(POWER_DOMAIN_AUDIO) |                   \
1967         BIT_ULL(POWER_DOMAIN_INIT))
1968         /*
1969          * - transcoder WD
1970          * - KVMR (HW control)
1971          */
1972 #define ICL_PW_2_POWER_DOMAINS (                        \
1973         ICL_PW_3_POWER_DOMAINS |                        \
1974         BIT_ULL(POWER_DOMAIN_INIT))
1975         /*
1976          * - eDP/DSI VDSC
1977          * - KVMR (HW control)
1978          */
1979 #define ICL_DISPLAY_DC_OFF_POWER_DOMAINS (              \
1980         ICL_PW_2_POWER_DOMAINS |                        \
1981         BIT_ULL(POWER_DOMAIN_MODESET) |                 \
1982         BIT_ULL(POWER_DOMAIN_AUX_A) |                   \
1983         BIT_ULL(POWER_DOMAIN_INIT))
1984
1985 #define ICL_DDI_IO_A_POWER_DOMAINS (                    \
1986         BIT_ULL(POWER_DOMAIN_PORT_DDI_A_IO))
1987 #define ICL_DDI_IO_B_POWER_DOMAINS (                    \
1988         BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO))
1989 #define ICL_DDI_IO_C_POWER_DOMAINS (                    \
1990         BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO))
1991 #define ICL_DDI_IO_D_POWER_DOMAINS (                    \
1992         BIT_ULL(POWER_DOMAIN_PORT_DDI_D_IO))
1993 #define ICL_DDI_IO_E_POWER_DOMAINS (                    \
1994         BIT_ULL(POWER_DOMAIN_PORT_DDI_E_IO))
1995 #define ICL_DDI_IO_F_POWER_DOMAINS (                    \
1996         BIT_ULL(POWER_DOMAIN_PORT_DDI_F_IO))
1997
1998 #define ICL_AUX_A_IO_POWER_DOMAINS (                    \
1999         BIT_ULL(POWER_DOMAIN_AUX_A))
2000 #define ICL_AUX_B_IO_POWER_DOMAINS (                    \
2001         BIT_ULL(POWER_DOMAIN_AUX_B))
2002 #define ICL_AUX_C_IO_POWER_DOMAINS (                    \
2003         BIT_ULL(POWER_DOMAIN_AUX_C))
2004 #define ICL_AUX_D_IO_POWER_DOMAINS (                    \
2005         BIT_ULL(POWER_DOMAIN_AUX_D))
2006 #define ICL_AUX_E_IO_POWER_DOMAINS (                    \
2007         BIT_ULL(POWER_DOMAIN_AUX_E))
2008 #define ICL_AUX_F_IO_POWER_DOMAINS (                    \
2009         BIT_ULL(POWER_DOMAIN_AUX_F))
2010 #define ICL_AUX_TBT1_IO_POWER_DOMAINS (                 \
2011         BIT_ULL(POWER_DOMAIN_AUX_TBT1))
2012 #define ICL_AUX_TBT2_IO_POWER_DOMAINS (                 \
2013         BIT_ULL(POWER_DOMAIN_AUX_TBT2))
2014 #define ICL_AUX_TBT3_IO_POWER_DOMAINS (                 \
2015         BIT_ULL(POWER_DOMAIN_AUX_TBT3))
2016 #define ICL_AUX_TBT4_IO_POWER_DOMAINS (                 \
2017         BIT_ULL(POWER_DOMAIN_AUX_TBT4))
2018
2019 static const struct i915_power_well_ops i9xx_always_on_power_well_ops = {
2020         .sync_hw = i9xx_power_well_sync_hw_noop,
2021         .enable = i9xx_always_on_power_well_noop,
2022         .disable = i9xx_always_on_power_well_noop,
2023         .is_enabled = i9xx_always_on_power_well_enabled,
2024 };
2025
2026 static const struct i915_power_well_ops chv_pipe_power_well_ops = {
2027         .sync_hw = i9xx_power_well_sync_hw_noop,
2028         .enable = chv_pipe_power_well_enable,
2029         .disable = chv_pipe_power_well_disable,
2030         .is_enabled = chv_pipe_power_well_enabled,
2031 };
2032
2033 static const struct i915_power_well_ops chv_dpio_cmn_power_well_ops = {
2034         .sync_hw = i9xx_power_well_sync_hw_noop,
2035         .enable = chv_dpio_cmn_power_well_enable,
2036         .disable = chv_dpio_cmn_power_well_disable,
2037         .is_enabled = vlv_power_well_enabled,
2038 };
2039
2040 static const struct i915_power_well_desc i9xx_always_on_power_well[] = {
2041         {
2042                 .name = "always-on",
2043                 .always_on = 1,
2044                 .domains = POWER_DOMAIN_MASK,
2045                 .ops = &i9xx_always_on_power_well_ops,
2046                 .id = DISP_PW_ID_NONE,
2047         },
2048 };
2049
2050 static const struct i915_power_well_ops i830_pipes_power_well_ops = {
2051         .sync_hw = i830_pipes_power_well_sync_hw,
2052         .enable = i830_pipes_power_well_enable,
2053         .disable = i830_pipes_power_well_disable,
2054         .is_enabled = i830_pipes_power_well_enabled,
2055 };
2056
2057 static const struct i915_power_well_desc i830_power_wells[] = {
2058         {
2059                 .name = "always-on",
2060                 .always_on = 1,
2061                 .domains = POWER_DOMAIN_MASK,
2062                 .ops = &i9xx_always_on_power_well_ops,
2063                 .id = DISP_PW_ID_NONE,
2064         },
2065         {
2066                 .name = "pipes",
2067                 .domains = I830_PIPES_POWER_DOMAINS,
2068                 .ops = &i830_pipes_power_well_ops,
2069                 .id = DISP_PW_ID_NONE,
2070         },
2071 };
2072
2073 static const struct i915_power_well_ops hsw_power_well_ops = {
2074         .sync_hw = hsw_power_well_sync_hw,
2075         .enable = hsw_power_well_enable,
2076         .disable = hsw_power_well_disable,
2077         .is_enabled = hsw_power_well_enabled,
2078 };
2079
2080 static const struct i915_power_well_ops gen9_dc_off_power_well_ops = {
2081         .sync_hw = i9xx_power_well_sync_hw_noop,
2082         .enable = gen9_dc_off_power_well_enable,
2083         .disable = gen9_dc_off_power_well_disable,
2084         .is_enabled = gen9_dc_off_power_well_enabled,
2085 };
2086
2087 static const struct i915_power_well_ops bxt_dpio_cmn_power_well_ops = {
2088         .sync_hw = i9xx_power_well_sync_hw_noop,
2089         .enable = bxt_dpio_cmn_power_well_enable,
2090         .disable = bxt_dpio_cmn_power_well_disable,
2091         .is_enabled = bxt_dpio_cmn_power_well_enabled,
2092 };
2093
2094 static const struct i915_power_well_regs hsw_power_well_regs = {
2095         .bios   = HSW_PWR_WELL_CTL1,
2096         .driver = HSW_PWR_WELL_CTL2,
2097         .kvmr   = HSW_PWR_WELL_CTL3,
2098         .debug  = HSW_PWR_WELL_CTL4,
2099 };
2100
2101 static const struct i915_power_well_desc hsw_power_wells[] = {
2102         {
2103                 .name = "always-on",
2104                 .always_on = 1,
2105                 .domains = POWER_DOMAIN_MASK,
2106                 .ops = &i9xx_always_on_power_well_ops,
2107                 .id = DISP_PW_ID_NONE,
2108         },
2109         {
2110                 .name = "display",
2111                 .domains = HSW_DISPLAY_POWER_DOMAINS,
2112                 .ops = &hsw_power_well_ops,
2113                 .id = HSW_DISP_PW_GLOBAL,
2114                 {
2115                         .hsw.regs = &hsw_power_well_regs,
2116                         .hsw.idx = HSW_PW_CTL_IDX_GLOBAL,
2117                         .hsw.has_vga = true,
2118                 },
2119         },
2120 };
2121
2122 static const struct i915_power_well_desc bdw_power_wells[] = {
2123         {
2124                 .name = "always-on",
2125                 .always_on = 1,
2126                 .domains = POWER_DOMAIN_MASK,
2127                 .ops = &i9xx_always_on_power_well_ops,
2128                 .id = DISP_PW_ID_NONE,
2129         },
2130         {
2131                 .name = "display",
2132                 .domains = BDW_DISPLAY_POWER_DOMAINS,
2133                 .ops = &hsw_power_well_ops,
2134                 .id = HSW_DISP_PW_GLOBAL,
2135                 {
2136                         .hsw.regs = &hsw_power_well_regs,
2137                         .hsw.idx = HSW_PW_CTL_IDX_GLOBAL,
2138                         .hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
2139                         .hsw.has_vga = true,
2140                 },
2141         },
2142 };
2143
2144 static const struct i915_power_well_ops vlv_display_power_well_ops = {
2145         .sync_hw = i9xx_power_well_sync_hw_noop,
2146         .enable = vlv_display_power_well_enable,
2147         .disable = vlv_display_power_well_disable,
2148         .is_enabled = vlv_power_well_enabled,
2149 };
2150
2151 static const struct i915_power_well_ops vlv_dpio_cmn_power_well_ops = {
2152         .sync_hw = i9xx_power_well_sync_hw_noop,
2153         .enable = vlv_dpio_cmn_power_well_enable,
2154         .disable = vlv_dpio_cmn_power_well_disable,
2155         .is_enabled = vlv_power_well_enabled,
2156 };
2157
2158 static const struct i915_power_well_ops vlv_dpio_power_well_ops = {
2159         .sync_hw = i9xx_power_well_sync_hw_noop,
2160         .enable = vlv_power_well_enable,
2161         .disable = vlv_power_well_disable,
2162         .is_enabled = vlv_power_well_enabled,
2163 };
2164
2165 static const struct i915_power_well_desc vlv_power_wells[] = {
2166         {
2167                 .name = "always-on",
2168                 .always_on = 1,
2169                 .domains = POWER_DOMAIN_MASK,
2170                 .ops = &i9xx_always_on_power_well_ops,
2171                 .id = DISP_PW_ID_NONE,
2172         },
2173         {
2174                 .name = "display",
2175                 .domains = VLV_DISPLAY_POWER_DOMAINS,
2176                 .ops = &vlv_display_power_well_ops,
2177                 .id = VLV_DISP_PW_DISP2D,
2178                 {
2179                         .vlv.idx = PUNIT_PWGT_IDX_DISP2D,
2180                 },
2181         },
2182         {
2183                 .name = "dpio-tx-b-01",
2184                 .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
2185                            VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
2186                            VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
2187                            VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
2188                 .ops = &vlv_dpio_power_well_ops,
2189                 .id = DISP_PW_ID_NONE,
2190                 {
2191                         .vlv.idx = PUNIT_PWGT_IDX_DPIO_TX_B_LANES_01,
2192                 },
2193         },
2194         {
2195                 .name = "dpio-tx-b-23",
2196                 .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
2197                            VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
2198                            VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
2199                            VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
2200                 .ops = &vlv_dpio_power_well_ops,
2201                 .id = DISP_PW_ID_NONE,
2202                 {
2203                         .vlv.idx = PUNIT_PWGT_IDX_DPIO_TX_B_LANES_23,
2204                 },
2205         },
2206         {
2207                 .name = "dpio-tx-c-01",
2208                 .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
2209                            VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
2210                            VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
2211                            VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
2212                 .ops = &vlv_dpio_power_well_ops,
2213                 .id = DISP_PW_ID_NONE,
2214                 {
2215                         .vlv.idx = PUNIT_PWGT_IDX_DPIO_TX_C_LANES_01,
2216                 },
2217         },
2218         {
2219                 .name = "dpio-tx-c-23",
2220                 .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
2221                            VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
2222                            VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
2223                            VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
2224                 .ops = &vlv_dpio_power_well_ops,
2225                 .id = DISP_PW_ID_NONE,
2226                 {
2227                         .vlv.idx = PUNIT_PWGT_IDX_DPIO_TX_C_LANES_23,
2228                 },
2229         },
2230         {
2231                 .name = "dpio-common",
2232                 .domains = VLV_DPIO_CMN_BC_POWER_DOMAINS,
2233                 .ops = &vlv_dpio_cmn_power_well_ops,
2234                 .id = VLV_DISP_PW_DPIO_CMN_BC,
2235                 {
2236                         .vlv.idx = PUNIT_PWGT_IDX_DPIO_CMN_BC,
2237                 },
2238         },
2239 };
2240
2241 static const struct i915_power_well_desc chv_power_wells[] = {
2242         {
2243                 .name = "always-on",
2244                 .always_on = 1,
2245                 .domains = POWER_DOMAIN_MASK,
2246                 .ops = &i9xx_always_on_power_well_ops,
2247                 .id = DISP_PW_ID_NONE,
2248         },
2249         {
2250                 .name = "display",
2251                 /*
2252                  * Pipe A power well is the new disp2d well. Pipe B and C
2253                  * power wells don't actually exist. Pipe A power well is
2254                  * required for any pipe to work.
2255                  */
2256                 .domains = CHV_DISPLAY_POWER_DOMAINS,
2257                 .ops = &chv_pipe_power_well_ops,
2258                 .id = DISP_PW_ID_NONE,
2259         },
2260         {
2261                 .name = "dpio-common-bc",
2262                 .domains = CHV_DPIO_CMN_BC_POWER_DOMAINS,
2263                 .ops = &chv_dpio_cmn_power_well_ops,
2264                 .id = VLV_DISP_PW_DPIO_CMN_BC,
2265                 {
2266                         .vlv.idx = PUNIT_PWGT_IDX_DPIO_CMN_BC,
2267                 },
2268         },
2269         {
2270                 .name = "dpio-common-d",
2271                 .domains = CHV_DPIO_CMN_D_POWER_DOMAINS,
2272                 .ops = &chv_dpio_cmn_power_well_ops,
2273                 .id = CHV_DISP_PW_DPIO_CMN_D,
2274                 {
2275                         .vlv.idx = PUNIT_PWGT_IDX_DPIO_CMN_D,
2276                 },
2277         },
2278 };
2279
2280 bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv,
2281                                          enum i915_power_well_id power_well_id)
2282 {
2283         struct i915_power_well *power_well;
2284         bool ret;
2285
2286         power_well = lookup_power_well(dev_priv, power_well_id);
2287         ret = power_well->desc->ops->is_enabled(dev_priv, power_well);
2288
2289         return ret;
2290 }
2291
2292 static const struct i915_power_well_desc skl_power_wells[] = {
2293         {
2294                 .name = "always-on",
2295                 .always_on = 1,
2296                 .domains = POWER_DOMAIN_MASK,
2297                 .ops = &i9xx_always_on_power_well_ops,
2298                 .id = DISP_PW_ID_NONE,
2299         },
2300         {
2301                 .name = "power well 1",
2302                 /* Handled by the DMC firmware */
2303                 .domains = 0,
2304                 .ops = &hsw_power_well_ops,
2305                 .id = SKL_DISP_PW_1,
2306                 {
2307                         .hsw.regs = &hsw_power_well_regs,
2308                         .hsw.idx = SKL_PW_CTL_IDX_PW_1,
2309                         .hsw.has_fuses = true,
2310                 },
2311         },
2312         {
2313                 .name = "MISC IO power well",
2314                 /* Handled by the DMC firmware */
2315                 .domains = 0,
2316                 .ops = &hsw_power_well_ops,
2317                 .id = SKL_DISP_PW_MISC_IO,
2318                 {
2319                         .hsw.regs = &hsw_power_well_regs,
2320                         .hsw.idx = SKL_PW_CTL_IDX_MISC_IO,
2321                 },
2322         },
2323         {
2324                 .name = "DC off",
2325                 .domains = SKL_DISPLAY_DC_OFF_POWER_DOMAINS,
2326                 .ops = &gen9_dc_off_power_well_ops,
2327                 .id = DISP_PW_ID_NONE,
2328         },
2329         {
2330                 .name = "power well 2",
2331                 .domains = SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS,
2332                 .ops = &hsw_power_well_ops,
2333                 .id = SKL_DISP_PW_2,
2334                 {
2335                         .hsw.regs = &hsw_power_well_regs,
2336                         .hsw.idx = SKL_PW_CTL_IDX_PW_2,
2337                         .hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
2338                         .hsw.has_vga = true,
2339                         .hsw.has_fuses = true,
2340                 },
2341         },
2342         {
2343                 .name = "DDI A/E IO power well",
2344                 .domains = SKL_DISPLAY_DDI_IO_A_E_POWER_DOMAINS,
2345                 .ops = &hsw_power_well_ops,
2346                 .id = DISP_PW_ID_NONE,
2347                 {
2348                         .hsw.regs = &hsw_power_well_regs,
2349                         .hsw.idx = SKL_PW_CTL_IDX_DDI_A_E,
2350                 },
2351         },
2352         {
2353                 .name = "DDI B IO power well",
2354                 .domains = SKL_DISPLAY_DDI_IO_B_POWER_DOMAINS,
2355                 .ops = &hsw_power_well_ops,
2356                 .id = DISP_PW_ID_NONE,
2357                 {
2358                         .hsw.regs = &hsw_power_well_regs,
2359                         .hsw.idx = SKL_PW_CTL_IDX_DDI_B,
2360                 },
2361         },
2362         {
2363                 .name = "DDI C IO power well",
2364                 .domains = SKL_DISPLAY_DDI_IO_C_POWER_DOMAINS,
2365                 .ops = &hsw_power_well_ops,
2366                 .id = DISP_PW_ID_NONE,
2367                 {
2368                         .hsw.regs = &hsw_power_well_regs,
2369                         .hsw.idx = SKL_PW_CTL_IDX_DDI_C,
2370                 },
2371         },
2372         {
2373                 .name = "DDI D IO power well",
2374                 .domains = SKL_DISPLAY_DDI_IO_D_POWER_DOMAINS,
2375                 .ops = &hsw_power_well_ops,
2376                 .id = DISP_PW_ID_NONE,
2377                 {
2378                         .hsw.regs = &hsw_power_well_regs,
2379                         .hsw.idx = SKL_PW_CTL_IDX_DDI_D,
2380                 },
2381         },
2382 };
2383
2384 static const struct i915_power_well_desc bxt_power_wells[] = {
2385         {
2386                 .name = "always-on",
2387                 .always_on = 1,
2388                 .domains = POWER_DOMAIN_MASK,
2389                 .ops = &i9xx_always_on_power_well_ops,
2390                 .id = DISP_PW_ID_NONE,
2391         },
2392         {
2393                 .name = "power well 1",
2394                 .domains = 0,
2395                 .ops = &hsw_power_well_ops,
2396                 .id = SKL_DISP_PW_1,
2397                 {
2398                         .hsw.regs = &hsw_power_well_regs,
2399                         .hsw.idx = SKL_PW_CTL_IDX_PW_1,
2400                         .hsw.has_fuses = true,
2401                 },
2402         },
2403         {
2404                 .name = "DC off",
2405                 .domains = BXT_DISPLAY_DC_OFF_POWER_DOMAINS,
2406                 .ops = &gen9_dc_off_power_well_ops,
2407                 .id = DISP_PW_ID_NONE,
2408         },
2409         {
2410                 .name = "power well 2",
2411                 .domains = BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS,
2412                 .ops = &hsw_power_well_ops,
2413                 .id = SKL_DISP_PW_2,
2414                 {
2415                         .hsw.regs = &hsw_power_well_regs,
2416                         .hsw.idx = SKL_PW_CTL_IDX_PW_2,
2417                         .hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
2418                         .hsw.has_vga = true,
2419                         .hsw.has_fuses = true,
2420                 },
2421         },
2422         {
2423                 .name = "dpio-common-a",
2424                 .domains = BXT_DPIO_CMN_A_POWER_DOMAINS,
2425                 .ops = &bxt_dpio_cmn_power_well_ops,
2426                 .id = BXT_DISP_PW_DPIO_CMN_A,
2427                 {
2428                         .bxt.phy = DPIO_PHY1,
2429                 },
2430         },
2431         {
2432                 .name = "dpio-common-bc",
2433                 .domains = BXT_DPIO_CMN_BC_POWER_DOMAINS,
2434                 .ops = &bxt_dpio_cmn_power_well_ops,
2435                 .id = VLV_DISP_PW_DPIO_CMN_BC,
2436                 {
2437                         .bxt.phy = DPIO_PHY0,
2438                 },
2439         },
2440 };
2441
2442 static const struct i915_power_well_desc glk_power_wells[] = {
2443         {
2444                 .name = "always-on",
2445                 .always_on = 1,
2446                 .domains = POWER_DOMAIN_MASK,
2447                 .ops = &i9xx_always_on_power_well_ops,
2448                 .id = DISP_PW_ID_NONE,
2449         },
2450         {
2451                 .name = "power well 1",
2452                 /* Handled by the DMC firmware */
2453                 .domains = 0,
2454                 .ops = &hsw_power_well_ops,
2455                 .id = SKL_DISP_PW_1,
2456                 {
2457                         .hsw.regs = &hsw_power_well_regs,
2458                         .hsw.idx = SKL_PW_CTL_IDX_PW_1,
2459                         .hsw.has_fuses = true,
2460                 },
2461         },
2462         {
2463                 .name = "DC off",
2464                 .domains = GLK_DISPLAY_DC_OFF_POWER_DOMAINS,
2465                 .ops = &gen9_dc_off_power_well_ops,
2466                 .id = DISP_PW_ID_NONE,
2467         },
2468         {
2469                 .name = "power well 2",
2470                 .domains = GLK_DISPLAY_POWERWELL_2_POWER_DOMAINS,
2471                 .ops = &hsw_power_well_ops,
2472                 .id = SKL_DISP_PW_2,
2473                 {
2474                         .hsw.regs = &hsw_power_well_regs,
2475                         .hsw.idx = SKL_PW_CTL_IDX_PW_2,
2476                         .hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
2477                         .hsw.has_vga = true,
2478                         .hsw.has_fuses = true,
2479                 },
2480         },
2481         {
2482                 .name = "dpio-common-a",
2483                 .domains = GLK_DPIO_CMN_A_POWER_DOMAINS,
2484                 .ops = &bxt_dpio_cmn_power_well_ops,
2485                 .id = BXT_DISP_PW_DPIO_CMN_A,
2486                 {
2487                         .bxt.phy = DPIO_PHY1,
2488                 },
2489         },
2490         {
2491                 .name = "dpio-common-b",
2492                 .domains = GLK_DPIO_CMN_B_POWER_DOMAINS,
2493                 .ops = &bxt_dpio_cmn_power_well_ops,
2494                 .id = VLV_DISP_PW_DPIO_CMN_BC,
2495                 {
2496                         .bxt.phy = DPIO_PHY0,
2497                 },
2498         },
2499         {
2500                 .name = "dpio-common-c",
2501                 .domains = GLK_DPIO_CMN_C_POWER_DOMAINS,
2502                 .ops = &bxt_dpio_cmn_power_well_ops,
2503                 .id = GLK_DISP_PW_DPIO_CMN_C,
2504                 {
2505                         .bxt.phy = DPIO_PHY2,
2506                 },
2507         },
2508         {
2509                 .name = "AUX A",
2510                 .domains = GLK_DISPLAY_AUX_A_POWER_DOMAINS,
2511                 .ops = &hsw_power_well_ops,
2512                 .id = DISP_PW_ID_NONE,
2513                 {
2514                         .hsw.regs = &hsw_power_well_regs,
2515                         .hsw.idx = GLK_PW_CTL_IDX_AUX_A,
2516                 },
2517         },
2518         {
2519                 .name = "AUX B",
2520                 .domains = GLK_DISPLAY_AUX_B_POWER_DOMAINS,
2521                 .ops = &hsw_power_well_ops,
2522                 .id = DISP_PW_ID_NONE,
2523                 {
2524                         .hsw.regs = &hsw_power_well_regs,
2525                         .hsw.idx = GLK_PW_CTL_IDX_AUX_B,
2526                 },
2527         },
2528         {
2529                 .name = "AUX C",
2530                 .domains = GLK_DISPLAY_AUX_C_POWER_DOMAINS,
2531                 .ops = &hsw_power_well_ops,
2532                 .id = DISP_PW_ID_NONE,
2533                 {
2534                         .hsw.regs = &hsw_power_well_regs,
2535                         .hsw.idx = GLK_PW_CTL_IDX_AUX_C,
2536                 },
2537         },
2538         {
2539                 .name = "DDI A IO power well",
2540                 .domains = GLK_DISPLAY_DDI_IO_A_POWER_DOMAINS,
2541                 .ops = &hsw_power_well_ops,
2542                 .id = DISP_PW_ID_NONE,
2543                 {
2544                         .hsw.regs = &hsw_power_well_regs,
2545                         .hsw.idx = GLK_PW_CTL_IDX_DDI_A,
2546                 },
2547         },
2548         {
2549                 .name = "DDI B IO power well",
2550                 .domains = GLK_DISPLAY_DDI_IO_B_POWER_DOMAINS,
2551                 .ops = &hsw_power_well_ops,
2552                 .id = DISP_PW_ID_NONE,
2553                 {
2554                         .hsw.regs = &hsw_power_well_regs,
2555                         .hsw.idx = SKL_PW_CTL_IDX_DDI_B,
2556                 },
2557         },
2558         {
2559                 .name = "DDI C IO power well",
2560                 .domains = GLK_DISPLAY_DDI_IO_C_POWER_DOMAINS,
2561                 .ops = &hsw_power_well_ops,
2562                 .id = DISP_PW_ID_NONE,
2563                 {
2564                         .hsw.regs = &hsw_power_well_regs,
2565                         .hsw.idx = SKL_PW_CTL_IDX_DDI_C,
2566                 },
2567         },
2568 };
2569
2570 static const struct i915_power_well_desc cnl_power_wells[] = {
2571         {
2572                 .name = "always-on",
2573                 .always_on = 1,
2574                 .domains = POWER_DOMAIN_MASK,
2575                 .ops = &i9xx_always_on_power_well_ops,
2576                 .id = DISP_PW_ID_NONE,
2577         },
2578         {
2579                 .name = "power well 1",
2580                 /* Handled by the DMC firmware */
2581                 .domains = 0,
2582                 .ops = &hsw_power_well_ops,
2583                 .id = SKL_DISP_PW_1,
2584                 {
2585                         .hsw.regs = &hsw_power_well_regs,
2586                         .hsw.idx = SKL_PW_CTL_IDX_PW_1,
2587                         .hsw.has_fuses = true,
2588                 },
2589         },
2590         {
2591                 .name = "AUX A",
2592                 .domains = CNL_DISPLAY_AUX_A_POWER_DOMAINS,
2593                 .ops = &hsw_power_well_ops,
2594                 .id = DISP_PW_ID_NONE,
2595                 {
2596                         .hsw.regs = &hsw_power_well_regs,
2597                         .hsw.idx = GLK_PW_CTL_IDX_AUX_A,
2598                 },
2599         },
2600         {
2601                 .name = "AUX B",
2602                 .domains = CNL_DISPLAY_AUX_B_POWER_DOMAINS,
2603                 .ops = &hsw_power_well_ops,
2604                 .id = DISP_PW_ID_NONE,
2605                 {
2606                         .hsw.regs = &hsw_power_well_regs,
2607                         .hsw.idx = GLK_PW_CTL_IDX_AUX_B,
2608                 },
2609         },
2610         {
2611                 .name = "AUX C",
2612                 .domains = CNL_DISPLAY_AUX_C_POWER_DOMAINS,
2613                 .ops = &hsw_power_well_ops,
2614                 .id = DISP_PW_ID_NONE,
2615                 {
2616                         .hsw.regs = &hsw_power_well_regs,
2617                         .hsw.idx = GLK_PW_CTL_IDX_AUX_C,
2618                 },
2619         },
2620         {
2621                 .name = "AUX D",
2622                 .domains = CNL_DISPLAY_AUX_D_POWER_DOMAINS,
2623                 .ops = &hsw_power_well_ops,
2624                 .id = DISP_PW_ID_NONE,
2625                 {
2626                         .hsw.regs = &hsw_power_well_regs,
2627                         .hsw.idx = CNL_PW_CTL_IDX_AUX_D,
2628                 },
2629         },
2630         {
2631                 .name = "DC off",
2632                 .domains = CNL_DISPLAY_DC_OFF_POWER_DOMAINS,
2633                 .ops = &gen9_dc_off_power_well_ops,
2634                 .id = DISP_PW_ID_NONE,
2635         },
2636         {
2637                 .name = "power well 2",
2638                 .domains = CNL_DISPLAY_POWERWELL_2_POWER_DOMAINS,
2639                 .ops = &hsw_power_well_ops,
2640                 .id = SKL_DISP_PW_2,
2641                 {
2642                         .hsw.regs = &hsw_power_well_regs,
2643                         .hsw.idx = SKL_PW_CTL_IDX_PW_2,
2644                         .hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
2645                         .hsw.has_vga = true,
2646                         .hsw.has_fuses = true,
2647                 },
2648         },
2649         {
2650                 .name = "DDI A IO power well",
2651                 .domains = CNL_DISPLAY_DDI_A_IO_POWER_DOMAINS,
2652                 .ops = &hsw_power_well_ops,
2653                 .id = DISP_PW_ID_NONE,
2654                 {
2655                         .hsw.regs = &hsw_power_well_regs,
2656                         .hsw.idx = GLK_PW_CTL_IDX_DDI_A,
2657                 },
2658         },
2659         {
2660                 .name = "DDI B IO power well",
2661                 .domains = CNL_DISPLAY_DDI_B_IO_POWER_DOMAINS,
2662                 .ops = &hsw_power_well_ops,
2663                 .id = DISP_PW_ID_NONE,
2664                 {
2665                         .hsw.regs = &hsw_power_well_regs,
2666                         .hsw.idx = SKL_PW_CTL_IDX_DDI_B,
2667                 },
2668         },
2669         {
2670                 .name = "DDI C IO power well",
2671                 .domains = CNL_DISPLAY_DDI_C_IO_POWER_DOMAINS,
2672                 .ops = &hsw_power_well_ops,
2673                 .id = DISP_PW_ID_NONE,
2674                 {
2675                         .hsw.regs = &hsw_power_well_regs,
2676                         .hsw.idx = SKL_PW_CTL_IDX_DDI_C,
2677                 },
2678         },
2679         {
2680                 .name = "DDI D IO power well",
2681                 .domains = CNL_DISPLAY_DDI_D_IO_POWER_DOMAINS,
2682                 .ops = &hsw_power_well_ops,
2683                 .id = DISP_PW_ID_NONE,
2684                 {
2685                         .hsw.regs = &hsw_power_well_regs,
2686                         .hsw.idx = SKL_PW_CTL_IDX_DDI_D,
2687                 },
2688         },
2689         {
2690                 .name = "DDI F IO power well",
2691                 .domains = CNL_DISPLAY_DDI_F_IO_POWER_DOMAINS,
2692                 .ops = &hsw_power_well_ops,
2693                 .id = DISP_PW_ID_NONE,
2694                 {
2695                         .hsw.regs = &hsw_power_well_regs,
2696                         .hsw.idx = CNL_PW_CTL_IDX_DDI_F,
2697                 },
2698         },
2699         {
2700                 .name = "AUX F",
2701                 .domains = CNL_DISPLAY_AUX_F_POWER_DOMAINS,
2702                 .ops = &hsw_power_well_ops,
2703                 .id = DISP_PW_ID_NONE,
2704                 {
2705                         .hsw.regs = &hsw_power_well_regs,
2706                         .hsw.idx = CNL_PW_CTL_IDX_AUX_F,
2707                 },
2708         },
2709 };
2710
2711 static const struct i915_power_well_ops icl_combo_phy_aux_power_well_ops = {
2712         .sync_hw = hsw_power_well_sync_hw,
2713         .enable = icl_combo_phy_aux_power_well_enable,
2714         .disable = icl_combo_phy_aux_power_well_disable,
2715         .is_enabled = hsw_power_well_enabled,
2716 };
2717
2718 static const struct i915_power_well_regs icl_aux_power_well_regs = {
2719         .bios   = ICL_PWR_WELL_CTL_AUX1,
2720         .driver = ICL_PWR_WELL_CTL_AUX2,
2721         .debug  = ICL_PWR_WELL_CTL_AUX4,
2722 };
2723
2724 static const struct i915_power_well_regs icl_ddi_power_well_regs = {
2725         .bios   = ICL_PWR_WELL_CTL_DDI1,
2726         .driver = ICL_PWR_WELL_CTL_DDI2,
2727         .debug  = ICL_PWR_WELL_CTL_DDI4,
2728 };
2729
2730 static const struct i915_power_well_desc icl_power_wells[] = {
2731         {
2732                 .name = "always-on",
2733                 .always_on = 1,
2734                 .domains = POWER_DOMAIN_MASK,
2735                 .ops = &i9xx_always_on_power_well_ops,
2736                 .id = DISP_PW_ID_NONE,
2737         },
2738         {
2739                 .name = "power well 1",
2740                 /* Handled by the DMC firmware */
2741                 .domains = 0,
2742                 .ops = &hsw_power_well_ops,
2743                 .id = SKL_DISP_PW_1,
2744                 {
2745                         .hsw.regs = &hsw_power_well_regs,
2746                         .hsw.idx = ICL_PW_CTL_IDX_PW_1,
2747                         .hsw.has_fuses = true,
2748                 },
2749         },
2750         {
2751                 .name = "power well 2",
2752                 .domains = ICL_PW_2_POWER_DOMAINS,
2753                 .ops = &hsw_power_well_ops,
2754                 .id = SKL_DISP_PW_2,
2755                 {
2756                         .hsw.regs = &hsw_power_well_regs,
2757                         .hsw.idx = ICL_PW_CTL_IDX_PW_2,
2758                         .hsw.has_fuses = true,
2759                 },
2760         },
2761         {
2762                 .name = "DC off",
2763                 .domains = ICL_DISPLAY_DC_OFF_POWER_DOMAINS,
2764                 .ops = &gen9_dc_off_power_well_ops,
2765                 .id = DISP_PW_ID_NONE,
2766         },
2767         {
2768                 .name = "power well 3",
2769                 .domains = ICL_PW_3_POWER_DOMAINS,
2770                 .ops = &hsw_power_well_ops,
2771                 .id = DISP_PW_ID_NONE,
2772                 {
2773                         .hsw.regs = &hsw_power_well_regs,
2774                         .hsw.idx = ICL_PW_CTL_IDX_PW_3,
2775                         .hsw.irq_pipe_mask = BIT(PIPE_B),
2776                         .hsw.has_vga = true,
2777                         .hsw.has_fuses = true,
2778                 },
2779         },
2780         {
2781                 .name = "DDI A IO",
2782                 .domains = ICL_DDI_IO_A_POWER_DOMAINS,
2783                 .ops = &hsw_power_well_ops,
2784                 .id = DISP_PW_ID_NONE,
2785                 {
2786                         .hsw.regs = &icl_ddi_power_well_regs,
2787                         .hsw.idx = ICL_PW_CTL_IDX_DDI_A,
2788                 },
2789         },
2790         {
2791                 .name = "DDI B IO",
2792                 .domains = ICL_DDI_IO_B_POWER_DOMAINS,
2793                 .ops = &hsw_power_well_ops,
2794                 .id = DISP_PW_ID_NONE,
2795                 {
2796                         .hsw.regs = &icl_ddi_power_well_regs,
2797                         .hsw.idx = ICL_PW_CTL_IDX_DDI_B,
2798                 },
2799         },
2800         {
2801                 .name = "DDI C IO",
2802                 .domains = ICL_DDI_IO_C_POWER_DOMAINS,
2803                 .ops = &hsw_power_well_ops,
2804                 .id = DISP_PW_ID_NONE,
2805                 {
2806                         .hsw.regs = &icl_ddi_power_well_regs,
2807                         .hsw.idx = ICL_PW_CTL_IDX_DDI_C,
2808                 },
2809         },
2810         {
2811                 .name = "DDI D IO",
2812                 .domains = ICL_DDI_IO_D_POWER_DOMAINS,
2813                 .ops = &hsw_power_well_ops,
2814                 .id = DISP_PW_ID_NONE,
2815                 {
2816                         .hsw.regs = &icl_ddi_power_well_regs,
2817                         .hsw.idx = ICL_PW_CTL_IDX_DDI_D,
2818                 },
2819         },
2820         {
2821                 .name = "DDI E IO",
2822                 .domains = ICL_DDI_IO_E_POWER_DOMAINS,
2823                 .ops = &hsw_power_well_ops,
2824                 .id = DISP_PW_ID_NONE,
2825                 {
2826                         .hsw.regs = &icl_ddi_power_well_regs,
2827                         .hsw.idx = ICL_PW_CTL_IDX_DDI_E,
2828                 },
2829         },
2830         {
2831                 .name = "DDI F IO",
2832                 .domains = ICL_DDI_IO_F_POWER_DOMAINS,
2833                 .ops = &hsw_power_well_ops,
2834                 .id = DISP_PW_ID_NONE,
2835                 {
2836                         .hsw.regs = &icl_ddi_power_well_regs,
2837                         .hsw.idx = ICL_PW_CTL_IDX_DDI_F,
2838                 },
2839         },
2840         {
2841                 .name = "AUX A",
2842                 .domains = ICL_AUX_A_IO_POWER_DOMAINS,
2843                 .ops = &icl_combo_phy_aux_power_well_ops,
2844                 .id = DISP_PW_ID_NONE,
2845                 {
2846                         .hsw.regs = &icl_aux_power_well_regs,
2847                         .hsw.idx = ICL_PW_CTL_IDX_AUX_A,
2848                 },
2849         },
2850         {
2851                 .name = "AUX B",
2852                 .domains = ICL_AUX_B_IO_POWER_DOMAINS,
2853                 .ops = &icl_combo_phy_aux_power_well_ops,
2854                 .id = DISP_PW_ID_NONE,
2855                 {
2856                         .hsw.regs = &icl_aux_power_well_regs,
2857                         .hsw.idx = ICL_PW_CTL_IDX_AUX_B,
2858                 },
2859         },
2860         {
2861                 .name = "AUX C",
2862                 .domains = ICL_AUX_C_IO_POWER_DOMAINS,
2863                 .ops = &hsw_power_well_ops,
2864                 .id = DISP_PW_ID_NONE,
2865                 {
2866                         .hsw.regs = &icl_aux_power_well_regs,
2867                         .hsw.idx = ICL_PW_CTL_IDX_AUX_C,
2868                 },
2869         },
2870         {
2871                 .name = "AUX D",
2872                 .domains = ICL_AUX_D_IO_POWER_DOMAINS,
2873                 .ops = &hsw_power_well_ops,
2874                 .id = DISP_PW_ID_NONE,
2875                 {
2876                         .hsw.regs = &icl_aux_power_well_regs,
2877                         .hsw.idx = ICL_PW_CTL_IDX_AUX_D,
2878                 },
2879         },
2880         {
2881                 .name = "AUX E",
2882                 .domains = ICL_AUX_E_IO_POWER_DOMAINS,
2883                 .ops = &hsw_power_well_ops,
2884                 .id = DISP_PW_ID_NONE,
2885                 {
2886                         .hsw.regs = &icl_aux_power_well_regs,
2887                         .hsw.idx = ICL_PW_CTL_IDX_AUX_E,
2888                 },
2889         },
2890         {
2891                 .name = "AUX F",
2892                 .domains = ICL_AUX_F_IO_POWER_DOMAINS,
2893                 .ops = &hsw_power_well_ops,
2894                 .id = DISP_PW_ID_NONE,
2895                 {
2896                         .hsw.regs = &icl_aux_power_well_regs,
2897                         .hsw.idx = ICL_PW_CTL_IDX_AUX_F,
2898                 },
2899         },
2900         {
2901                 .name = "AUX TBT1",
2902                 .domains = ICL_AUX_TBT1_IO_POWER_DOMAINS,
2903                 .ops = &hsw_power_well_ops,
2904                 .id = DISP_PW_ID_NONE,
2905                 {
2906                         .hsw.regs = &icl_aux_power_well_regs,
2907                         .hsw.idx = ICL_PW_CTL_IDX_AUX_TBT1,
2908                 },
2909         },
2910         {
2911                 .name = "AUX TBT2",
2912                 .domains = ICL_AUX_TBT2_IO_POWER_DOMAINS,
2913                 .ops = &hsw_power_well_ops,
2914                 .id = DISP_PW_ID_NONE,
2915                 {
2916                         .hsw.regs = &icl_aux_power_well_regs,
2917                         .hsw.idx = ICL_PW_CTL_IDX_AUX_TBT2,
2918                 },
2919         },
2920         {
2921                 .name = "AUX TBT3",
2922                 .domains = ICL_AUX_TBT3_IO_POWER_DOMAINS,
2923                 .ops = &hsw_power_well_ops,
2924                 .id = DISP_PW_ID_NONE,
2925                 {
2926                         .hsw.regs = &icl_aux_power_well_regs,
2927                         .hsw.idx = ICL_PW_CTL_IDX_AUX_TBT3,
2928                 },
2929         },
2930         {
2931                 .name = "AUX TBT4",
2932                 .domains = ICL_AUX_TBT4_IO_POWER_DOMAINS,
2933                 .ops = &hsw_power_well_ops,
2934                 .id = DISP_PW_ID_NONE,
2935                 {
2936                         .hsw.regs = &icl_aux_power_well_regs,
2937                         .hsw.idx = ICL_PW_CTL_IDX_AUX_TBT4,
2938                 },
2939         },
2940         {
2941                 .name = "power well 4",
2942                 .domains = ICL_PW_4_POWER_DOMAINS,
2943                 .ops = &hsw_power_well_ops,
2944                 .id = DISP_PW_ID_NONE,
2945                 {
2946                         .hsw.regs = &hsw_power_well_regs,
2947                         .hsw.idx = ICL_PW_CTL_IDX_PW_4,
2948                         .hsw.has_fuses = true,
2949                         .hsw.irq_pipe_mask = BIT(PIPE_C),
2950                 },
2951         },
2952 };
2953
2954 static int
2955 sanitize_disable_power_well_option(const struct drm_i915_private *dev_priv,
2956                                    int disable_power_well)
2957 {
2958         if (disable_power_well >= 0)
2959                 return !!disable_power_well;
2960
2961         return 1;
2962 }
2963
2964 static uint32_t get_allowed_dc_mask(const struct drm_i915_private *dev_priv,
2965                                     int enable_dc)
2966 {
2967         uint32_t mask;
2968         int requested_dc;
2969         int max_dc;
2970
2971         if (IS_GEN9_BC(dev_priv) || INTEL_INFO(dev_priv)->gen >= 10) {
2972                 max_dc = 2;
2973                 mask = 0;
2974         } else if (IS_GEN9_LP(dev_priv)) {
2975                 max_dc = 1;
2976                 /*
2977                  * DC9 has a separate HW flow from the rest of the DC states,
2978                  * not depending on the DMC firmware. It's needed by system
2979                  * suspend/resume, so allow it unconditionally.
2980                  */
2981                 mask = DC_STATE_EN_DC9;
2982         } else {
2983                 max_dc = 0;
2984                 mask = 0;
2985         }
2986
2987         if (!i915_modparams.disable_power_well)
2988                 max_dc = 0;
2989
2990         if (enable_dc >= 0 && enable_dc <= max_dc) {
2991                 requested_dc = enable_dc;
2992         } else if (enable_dc == -1) {
2993                 requested_dc = max_dc;
2994         } else if (enable_dc > max_dc && enable_dc <= 2) {
2995                 DRM_DEBUG_KMS("Adjusting requested max DC state (%d->%d)\n",
2996                               enable_dc, max_dc);
2997                 requested_dc = max_dc;
2998         } else {
2999                 DRM_ERROR("Unexpected value for enable_dc (%d)\n", enable_dc);
3000                 requested_dc = max_dc;
3001         }
3002
3003         if (requested_dc > 1)
3004                 mask |= DC_STATE_EN_UPTO_DC6;
3005         if (requested_dc > 0)
3006                 mask |= DC_STATE_EN_UPTO_DC5;
3007
3008         DRM_DEBUG_KMS("Allowed DC state mask %02x\n", mask);
3009
3010         return mask;
3011 }
3012
3013 static int
3014 __set_power_wells(struct i915_power_domains *power_domains,
3015                   const struct i915_power_well_desc *power_well_descs,
3016                   int power_well_count)
3017 {
3018         u64 power_well_ids = 0;
3019         int i;
3020
3021         power_domains->power_well_count = power_well_count;
3022         power_domains->power_wells =
3023                                 kcalloc(power_well_count,
3024                                         sizeof(*power_domains->power_wells),
3025                                         GFP_KERNEL);
3026         if (!power_domains->power_wells)
3027                 return -ENOMEM;
3028
3029         for (i = 0; i < power_well_count; i++) {
3030                 enum i915_power_well_id id = power_well_descs[i].id;
3031
3032                 power_domains->power_wells[i].desc = &power_well_descs[i];
3033
3034                 if (id == DISP_PW_ID_NONE)
3035                         continue;
3036
3037                 WARN_ON(id >= sizeof(power_well_ids) * 8);
3038                 WARN_ON(power_well_ids & BIT_ULL(id));
3039                 power_well_ids |= BIT_ULL(id);
3040         }
3041
3042         return 0;
3043 }
3044
3045 #define set_power_wells(power_domains, __power_well_descs) \
3046         __set_power_wells(power_domains, __power_well_descs, \
3047                           ARRAY_SIZE(__power_well_descs))
3048
3049 /**
3050  * intel_power_domains_init - initializes the power domain structures
3051  * @dev_priv: i915 device instance
3052  *
3053  * Initializes the power domain structures for @dev_priv depending upon the
3054  * supported platform.
3055  */
3056 int intel_power_domains_init(struct drm_i915_private *dev_priv)
3057 {
3058         struct i915_power_domains *power_domains = &dev_priv->power_domains;
3059         int err;
3060
3061         i915_modparams.disable_power_well =
3062                 sanitize_disable_power_well_option(dev_priv,
3063                                                    i915_modparams.disable_power_well);
3064         dev_priv->csr.allowed_dc_mask =
3065                 get_allowed_dc_mask(dev_priv, i915_modparams.enable_dc);
3066
3067         BUILD_BUG_ON(POWER_DOMAIN_NUM > 64);
3068
3069         mutex_init(&power_domains->lock);
3070
3071         /*
3072          * The enabling order will be from lower to higher indexed wells,
3073          * the disabling order is reversed.
3074          */
3075         if (IS_ICELAKE(dev_priv)) {
3076                 err = set_power_wells(power_domains, icl_power_wells);
3077         } else if (IS_HASWELL(dev_priv)) {
3078                 err = set_power_wells(power_domains, hsw_power_wells);
3079         } else if (IS_BROADWELL(dev_priv)) {
3080                 err = set_power_wells(power_domains, bdw_power_wells);
3081         } else if (IS_GEN9_BC(dev_priv)) {
3082                 err = set_power_wells(power_domains, skl_power_wells);
3083         } else if (IS_CANNONLAKE(dev_priv)) {
3084                 err = set_power_wells(power_domains, cnl_power_wells);
3085
3086                 /*
3087                  * DDI and Aux IO are getting enabled for all ports
3088                  * regardless the presence or use. So, in order to avoid
3089                  * timeouts, lets remove them from the list
3090                  * for the SKUs without port F.
3091                  */
3092                 if (!IS_CNL_WITH_PORT_F(dev_priv))
3093                         power_domains->power_well_count -= 2;
3094
3095         } else if (IS_BROXTON(dev_priv)) {
3096                 err = set_power_wells(power_domains, bxt_power_wells);
3097         } else if (IS_GEMINILAKE(dev_priv)) {
3098                 err = set_power_wells(power_domains, glk_power_wells);
3099         } else if (IS_CHERRYVIEW(dev_priv)) {
3100                 err = set_power_wells(power_domains, chv_power_wells);
3101         } else if (IS_VALLEYVIEW(dev_priv)) {
3102                 err = set_power_wells(power_domains, vlv_power_wells);
3103         } else if (IS_I830(dev_priv)) {
3104                 err = set_power_wells(power_domains, i830_power_wells);
3105         } else {
3106                 err = set_power_wells(power_domains, i9xx_always_on_power_well);
3107         }
3108
3109         return err;
3110 }
3111
3112 /**
3113  * intel_power_domains_cleanup - clean up power domains resources
3114  * @dev_priv: i915 device instance
3115  *
3116  * Release any resources acquired by intel_power_domains_init()
3117  */
3118 void intel_power_domains_cleanup(struct drm_i915_private *dev_priv)
3119 {
3120         kfree(dev_priv->power_domains.power_wells);
3121 }
3122
3123 static void intel_power_domains_sync_hw(struct drm_i915_private *dev_priv)
3124 {
3125         struct i915_power_domains *power_domains = &dev_priv->power_domains;
3126         struct i915_power_well *power_well;
3127
3128         mutex_lock(&power_domains->lock);
3129         for_each_power_well(dev_priv, power_well) {
3130                 power_well->desc->ops->sync_hw(dev_priv, power_well);
3131                 power_well->hw_enabled =
3132                         power_well->desc->ops->is_enabled(dev_priv, power_well);
3133         }
3134         mutex_unlock(&power_domains->lock);
3135 }
3136
3137 static inline
3138 bool intel_dbuf_slice_set(struct drm_i915_private *dev_priv,
3139                           i915_reg_t reg, bool enable)
3140 {
3141         u32 val, status;
3142
3143         val = I915_READ(reg);
3144         val = enable ? (val | DBUF_POWER_REQUEST) : (val & ~DBUF_POWER_REQUEST);
3145         I915_WRITE(reg, val);
3146         POSTING_READ(reg);
3147         udelay(10);
3148
3149         status = I915_READ(reg) & DBUF_POWER_STATE;
3150         if ((enable && !status) || (!enable && status)) {
3151                 DRM_ERROR("DBus power %s timeout!\n",
3152                           enable ? "enable" : "disable");
3153                 return false;
3154         }
3155         return true;
3156 }
3157
3158 static void gen9_dbuf_enable(struct drm_i915_private *dev_priv)
3159 {
3160         intel_dbuf_slice_set(dev_priv, DBUF_CTL, true);
3161 }
3162
3163 static void gen9_dbuf_disable(struct drm_i915_private *dev_priv)
3164 {
3165         intel_dbuf_slice_set(dev_priv, DBUF_CTL, false);
3166 }
3167
3168 static u8 intel_dbuf_max_slices(struct drm_i915_private *dev_priv)
3169 {
3170         if (INTEL_GEN(dev_priv) < 11)
3171                 return 1;
3172         return 2;
3173 }
3174
3175 void icl_dbuf_slices_update(struct drm_i915_private *dev_priv,
3176                             u8 req_slices)
3177 {
3178         u8 hw_enabled_slices = dev_priv->wm.skl_hw.ddb.enabled_slices;
3179         u32 val;
3180         bool ret;
3181
3182         if (req_slices > intel_dbuf_max_slices(dev_priv)) {
3183                 DRM_ERROR("Invalid number of dbuf slices requested\n");
3184                 return;
3185         }
3186
3187         if (req_slices == hw_enabled_slices || req_slices == 0)
3188                 return;
3189
3190         val = I915_READ(DBUF_CTL_S2);
3191         if (req_slices > hw_enabled_slices)
3192                 ret = intel_dbuf_slice_set(dev_priv, DBUF_CTL_S2, true);
3193         else
3194                 ret = intel_dbuf_slice_set(dev_priv, DBUF_CTL_S2, false);
3195
3196         if (ret)
3197                 dev_priv->wm.skl_hw.ddb.enabled_slices = req_slices;
3198 }
3199
3200 static void icl_dbuf_enable(struct drm_i915_private *dev_priv)
3201 {
3202         I915_WRITE(DBUF_CTL_S1, I915_READ(DBUF_CTL_S1) | DBUF_POWER_REQUEST);
3203         I915_WRITE(DBUF_CTL_S2, I915_READ(DBUF_CTL_S2) | DBUF_POWER_REQUEST);
3204         POSTING_READ(DBUF_CTL_S2);
3205
3206         udelay(10);
3207
3208         if (!(I915_READ(DBUF_CTL_S1) & DBUF_POWER_STATE) ||
3209             !(I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE))
3210                 DRM_ERROR("DBuf power enable timeout\n");
3211         else
3212                 dev_priv->wm.skl_hw.ddb.enabled_slices = 2;
3213 }
3214
3215 static void icl_dbuf_disable(struct drm_i915_private *dev_priv)
3216 {
3217         I915_WRITE(DBUF_CTL_S1, I915_READ(DBUF_CTL_S1) & ~DBUF_POWER_REQUEST);
3218         I915_WRITE(DBUF_CTL_S2, I915_READ(DBUF_CTL_S2) & ~DBUF_POWER_REQUEST);
3219         POSTING_READ(DBUF_CTL_S2);
3220
3221         udelay(10);
3222
3223         if ((I915_READ(DBUF_CTL_S1) & DBUF_POWER_STATE) ||
3224             (I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE))
3225                 DRM_ERROR("DBuf power disable timeout!\n");
3226         else
3227                 dev_priv->wm.skl_hw.ddb.enabled_slices = 0;
3228 }
3229
3230 static void icl_mbus_init(struct drm_i915_private *dev_priv)
3231 {
3232         uint32_t val;
3233
3234         val = MBUS_ABOX_BT_CREDIT_POOL1(16) |
3235               MBUS_ABOX_BT_CREDIT_POOL2(16) |
3236               MBUS_ABOX_B_CREDIT(1) |
3237               MBUS_ABOX_BW_CREDIT(1);
3238
3239         I915_WRITE(MBUS_ABOX_CTL, val);
3240 }
3241
3242 static void skl_display_core_init(struct drm_i915_private *dev_priv,
3243                                    bool resume)
3244 {
3245         struct i915_power_domains *power_domains = &dev_priv->power_domains;
3246         struct i915_power_well *well;
3247         uint32_t val;
3248
3249         gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
3250
3251         /* enable PCH reset handshake */
3252         val = I915_READ(HSW_NDE_RSTWRN_OPT);
3253         I915_WRITE(HSW_NDE_RSTWRN_OPT, val | RESET_PCH_HANDSHAKE_ENABLE);
3254
3255         /* enable PG1 and Misc I/O */
3256         mutex_lock(&power_domains->lock);
3257
3258         well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
3259         intel_power_well_enable(dev_priv, well);
3260
3261         well = lookup_power_well(dev_priv, SKL_DISP_PW_MISC_IO);
3262         intel_power_well_enable(dev_priv, well);
3263
3264         mutex_unlock(&power_domains->lock);
3265
3266         skl_init_cdclk(dev_priv);
3267
3268         gen9_dbuf_enable(dev_priv);
3269
3270         if (resume && dev_priv->csr.dmc_payload)
3271                 intel_csr_load_program(dev_priv);
3272 }
3273
3274 static void skl_display_core_uninit(struct drm_i915_private *dev_priv)
3275 {
3276         struct i915_power_domains *power_domains = &dev_priv->power_domains;
3277         struct i915_power_well *well;
3278
3279         gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
3280
3281         gen9_dbuf_disable(dev_priv);
3282
3283         skl_uninit_cdclk(dev_priv);
3284
3285         /* The spec doesn't call for removing the reset handshake flag */
3286         /* disable PG1 and Misc I/O */
3287
3288         mutex_lock(&power_domains->lock);
3289
3290         /*
3291          * BSpec says to keep the MISC IO power well enabled here, only
3292          * remove our request for power well 1.
3293          * Note that even though the driver's request is removed power well 1
3294          * may stay enabled after this due to DMC's own request on it.
3295          */
3296         well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
3297         intel_power_well_disable(dev_priv, well);
3298
3299         mutex_unlock(&power_domains->lock);
3300
3301         usleep_range(10, 30);           /* 10 us delay per Bspec */
3302 }
3303
3304 void bxt_display_core_init(struct drm_i915_private *dev_priv,
3305                            bool resume)
3306 {
3307         struct i915_power_domains *power_domains = &dev_priv->power_domains;
3308         struct i915_power_well *well;
3309         uint32_t val;
3310
3311         gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
3312
3313         /*
3314          * NDE_RSTWRN_OPT RST PCH Handshake En must always be 0b on BXT
3315          * or else the reset will hang because there is no PCH to respond.
3316          * Move the handshake programming to initialization sequence.
3317          * Previously was left up to BIOS.
3318          */
3319         val = I915_READ(HSW_NDE_RSTWRN_OPT);
3320         val &= ~RESET_PCH_HANDSHAKE_ENABLE;
3321         I915_WRITE(HSW_NDE_RSTWRN_OPT, val);
3322
3323         /* Enable PG1 */
3324         mutex_lock(&power_domains->lock);
3325
3326         well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
3327         intel_power_well_enable(dev_priv, well);
3328
3329         mutex_unlock(&power_domains->lock);
3330
3331         bxt_init_cdclk(dev_priv);
3332
3333         gen9_dbuf_enable(dev_priv);
3334
3335         if (resume && dev_priv->csr.dmc_payload)
3336                 intel_csr_load_program(dev_priv);
3337 }
3338
3339 void bxt_display_core_uninit(struct drm_i915_private *dev_priv)
3340 {
3341         struct i915_power_domains *power_domains = &dev_priv->power_domains;
3342         struct i915_power_well *well;
3343
3344         gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
3345
3346         gen9_dbuf_disable(dev_priv);
3347
3348         bxt_uninit_cdclk(dev_priv);
3349
3350         /* The spec doesn't call for removing the reset handshake flag */
3351
3352         /*
3353          * Disable PW1 (PG1).
3354          * Note that even though the driver's request is removed power well 1
3355          * may stay enabled after this due to DMC's own request on it.
3356          */
3357         mutex_lock(&power_domains->lock);
3358
3359         well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
3360         intel_power_well_disable(dev_priv, well);
3361
3362         mutex_unlock(&power_domains->lock);
3363
3364         usleep_range(10, 30);           /* 10 us delay per Bspec */
3365 }
3366
3367 enum {
3368         PROCMON_0_85V_DOT_0,
3369         PROCMON_0_95V_DOT_0,
3370         PROCMON_0_95V_DOT_1,
3371         PROCMON_1_05V_DOT_0,
3372         PROCMON_1_05V_DOT_1,
3373 };
3374
3375 static const struct cnl_procmon {
3376         u32 dw1, dw9, dw10;
3377 } cnl_procmon_values[] = {
3378         [PROCMON_0_85V_DOT_0] =
3379                 { .dw1 = 0x00000000, .dw9 = 0x62AB67BB, .dw10 = 0x51914F96, },
3380         [PROCMON_0_95V_DOT_0] =
3381                 { .dw1 = 0x00000000, .dw9 = 0x86E172C7, .dw10 = 0x77CA5EAB, },
3382         [PROCMON_0_95V_DOT_1] =
3383                 { .dw1 = 0x00000000, .dw9 = 0x93F87FE1, .dw10 = 0x8AE871C5, },
3384         [PROCMON_1_05V_DOT_0] =
3385                 { .dw1 = 0x00000000, .dw9 = 0x98FA82DD, .dw10 = 0x89E46DC1, },
3386         [PROCMON_1_05V_DOT_1] =
3387                 { .dw1 = 0x00440000, .dw9 = 0x9A00AB25, .dw10 = 0x8AE38FF1, },
3388 };
3389
3390 /*
3391  * CNL has just one set of registers, while ICL has two sets: one for port A and
3392  * the other for port B. The CNL registers are equivalent to the ICL port A
3393  * registers, that's why we call the ICL macros even though the function has CNL
3394  * on its name.
3395  */
3396 static void cnl_set_procmon_ref_values(struct drm_i915_private *dev_priv,
3397                                        enum port port)
3398 {
3399         const struct cnl_procmon *procmon;
3400         u32 val;
3401
3402         val = I915_READ(ICL_PORT_COMP_DW3(port));
3403         switch (val & (PROCESS_INFO_MASK | VOLTAGE_INFO_MASK)) {
3404         default:
3405                 MISSING_CASE(val);
3406                 /* fall through */
3407         case VOLTAGE_INFO_0_85V | PROCESS_INFO_DOT_0:
3408                 procmon = &cnl_procmon_values[PROCMON_0_85V_DOT_0];
3409                 break;
3410         case VOLTAGE_INFO_0_95V | PROCESS_INFO_DOT_0:
3411                 procmon = &cnl_procmon_values[PROCMON_0_95V_DOT_0];
3412                 break;
3413         case VOLTAGE_INFO_0_95V | PROCESS_INFO_DOT_1:
3414                 procmon = &cnl_procmon_values[PROCMON_0_95V_DOT_1];
3415                 break;
3416         case VOLTAGE_INFO_1_05V | PROCESS_INFO_DOT_0:
3417                 procmon = &cnl_procmon_values[PROCMON_1_05V_DOT_0];
3418                 break;
3419         case VOLTAGE_INFO_1_05V | PROCESS_INFO_DOT_1:
3420                 procmon = &cnl_procmon_values[PROCMON_1_05V_DOT_1];
3421                 break;
3422         }
3423
3424         val = I915_READ(ICL_PORT_COMP_DW1(port));
3425         val &= ~((0xff << 16) | 0xff);
3426         val |= procmon->dw1;
3427         I915_WRITE(ICL_PORT_COMP_DW1(port), val);
3428
3429         I915_WRITE(ICL_PORT_COMP_DW9(port), procmon->dw9);
3430         I915_WRITE(ICL_PORT_COMP_DW10(port), procmon->dw10);
3431 }
3432
3433 static void cnl_display_core_init(struct drm_i915_private *dev_priv, bool resume)
3434 {
3435         struct i915_power_domains *power_domains = &dev_priv->power_domains;
3436         struct i915_power_well *well;
3437         u32 val;
3438
3439         gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
3440
3441         /* 1. Enable PCH Reset Handshake */
3442         val = I915_READ(HSW_NDE_RSTWRN_OPT);
3443         val |= RESET_PCH_HANDSHAKE_ENABLE;
3444         I915_WRITE(HSW_NDE_RSTWRN_OPT, val);
3445
3446         /* 2. Enable Comp */
3447         val = I915_READ(CHICKEN_MISC_2);
3448         val &= ~CNL_COMP_PWR_DOWN;
3449         I915_WRITE(CHICKEN_MISC_2, val);
3450
3451         /* Dummy PORT_A to get the correct CNL register from the ICL macro */
3452         cnl_set_procmon_ref_values(dev_priv, PORT_A);
3453
3454         val = I915_READ(CNL_PORT_COMP_DW0);
3455         val |= COMP_INIT;
3456         I915_WRITE(CNL_PORT_COMP_DW0, val);
3457
3458         /* 3. */
3459         val = I915_READ(CNL_PORT_CL1CM_DW5);
3460         val |= CL_POWER_DOWN_ENABLE;
3461         I915_WRITE(CNL_PORT_CL1CM_DW5, val);
3462
3463         /*
3464          * 4. Enable Power Well 1 (PG1).
3465          *    The AUX IO power wells will be enabled on demand.
3466          */
3467         mutex_lock(&power_domains->lock);
3468         well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
3469         intel_power_well_enable(dev_priv, well);
3470         mutex_unlock(&power_domains->lock);
3471
3472         /* 5. Enable CD clock */
3473         cnl_init_cdclk(dev_priv);
3474
3475         /* 6. Enable DBUF */
3476         gen9_dbuf_enable(dev_priv);
3477
3478         if (resume && dev_priv->csr.dmc_payload)
3479                 intel_csr_load_program(dev_priv);
3480 }
3481
3482 static void cnl_display_core_uninit(struct drm_i915_private *dev_priv)
3483 {
3484         struct i915_power_domains *power_domains = &dev_priv->power_domains;
3485         struct i915_power_well *well;
3486         u32 val;
3487
3488         gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
3489
3490         /* 1. Disable all display engine functions -> aready done */
3491
3492         /* 2. Disable DBUF */
3493         gen9_dbuf_disable(dev_priv);
3494
3495         /* 3. Disable CD clock */
3496         cnl_uninit_cdclk(dev_priv);
3497
3498         /*
3499          * 4. Disable Power Well 1 (PG1).
3500          *    The AUX IO power wells are toggled on demand, so they are already
3501          *    disabled at this point.
3502          */
3503         mutex_lock(&power_domains->lock);
3504         well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
3505         intel_power_well_disable(dev_priv, well);
3506         mutex_unlock(&power_domains->lock);
3507
3508         usleep_range(10, 30);           /* 10 us delay per Bspec */
3509
3510         /* 5. Disable Comp */
3511         val = I915_READ(CHICKEN_MISC_2);
3512         val |= CNL_COMP_PWR_DOWN;
3513         I915_WRITE(CHICKEN_MISC_2, val);
3514 }
3515
3516 static void icl_display_core_init(struct drm_i915_private *dev_priv,
3517                                   bool resume)
3518 {
3519         struct i915_power_domains *power_domains = &dev_priv->power_domains;
3520         struct i915_power_well *well;
3521         enum port port;
3522         u32 val;
3523
3524         gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
3525
3526         /* 1. Enable PCH reset handshake. */
3527         val = I915_READ(HSW_NDE_RSTWRN_OPT);
3528         val |= RESET_PCH_HANDSHAKE_ENABLE;
3529         I915_WRITE(HSW_NDE_RSTWRN_OPT, val);
3530
3531         for (port = PORT_A; port <= PORT_B; port++) {
3532                 /* 2. Enable DDI combo PHY comp. */
3533                 val = I915_READ(ICL_PHY_MISC(port));
3534                 val &= ~ICL_PHY_MISC_DE_IO_COMP_PWR_DOWN;
3535                 I915_WRITE(ICL_PHY_MISC(port), val);
3536
3537                 cnl_set_procmon_ref_values(dev_priv, port);
3538
3539                 val = I915_READ(ICL_PORT_COMP_DW0(port));
3540                 val |= COMP_INIT;
3541                 I915_WRITE(ICL_PORT_COMP_DW0(port), val);
3542
3543                 /* 3. Set power down enable. */
3544                 val = I915_READ(ICL_PORT_CL_DW5(port));
3545                 val |= CL_POWER_DOWN_ENABLE;
3546                 I915_WRITE(ICL_PORT_CL_DW5(port), val);
3547         }
3548
3549         /*
3550          * 4. Enable Power Well 1 (PG1).
3551          *    The AUX IO power wells will be enabled on demand.
3552          */
3553         mutex_lock(&power_domains->lock);
3554         well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
3555         intel_power_well_enable(dev_priv, well);
3556         mutex_unlock(&power_domains->lock);
3557
3558         /* 5. Enable CDCLK. */
3559         icl_init_cdclk(dev_priv);
3560
3561         /* 6. Enable DBUF. */
3562         icl_dbuf_enable(dev_priv);
3563
3564         /* 7. Setup MBUS. */
3565         icl_mbus_init(dev_priv);
3566 }
3567
3568 static void icl_display_core_uninit(struct drm_i915_private *dev_priv)
3569 {
3570         struct i915_power_domains *power_domains = &dev_priv->power_domains;
3571         struct i915_power_well *well;
3572         enum port port;
3573         u32 val;
3574
3575         gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
3576
3577         /* 1. Disable all display engine functions -> aready done */
3578
3579         /* 2. Disable DBUF */
3580         icl_dbuf_disable(dev_priv);
3581
3582         /* 3. Disable CD clock */
3583         icl_uninit_cdclk(dev_priv);
3584
3585         /*
3586          * 4. Disable Power Well 1 (PG1).
3587          *    The AUX IO power wells are toggled on demand, so they are already
3588          *    disabled at this point.
3589          */
3590         mutex_lock(&power_domains->lock);
3591         well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
3592         intel_power_well_disable(dev_priv, well);
3593         mutex_unlock(&power_domains->lock);
3594
3595         /* 5. Disable Comp */
3596         for (port = PORT_A; port <= PORT_B; port++) {
3597                 val = I915_READ(ICL_PHY_MISC(port));
3598                 val |= ICL_PHY_MISC_DE_IO_COMP_PWR_DOWN;
3599                 I915_WRITE(ICL_PHY_MISC(port), val);
3600         }
3601 }
3602
3603 static void chv_phy_control_init(struct drm_i915_private *dev_priv)
3604 {
3605         struct i915_power_well *cmn_bc =
3606                 lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
3607         struct i915_power_well *cmn_d =
3608                 lookup_power_well(dev_priv, CHV_DISP_PW_DPIO_CMN_D);
3609
3610         /*
3611          * DISPLAY_PHY_CONTROL can get corrupted if read. As a
3612          * workaround never ever read DISPLAY_PHY_CONTROL, and
3613          * instead maintain a shadow copy ourselves. Use the actual
3614          * power well state and lane status to reconstruct the
3615          * expected initial value.
3616          */
3617         dev_priv->chv_phy_control =
3618                 PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY0) |
3619                 PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY1) |
3620                 PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH0) |
3621                 PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH1) |
3622                 PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY1, DPIO_CH0);
3623
3624         /*
3625          * If all lanes are disabled we leave the override disabled
3626          * with all power down bits cleared to match the state we
3627          * would use after disabling the port. Otherwise enable the
3628          * override and set the lane powerdown bits accding to the
3629          * current lane status.
3630          */
3631         if (cmn_bc->desc->ops->is_enabled(dev_priv, cmn_bc)) {
3632                 uint32_t status = I915_READ(DPLL(PIPE_A));
3633                 unsigned int mask;
3634
3635                 mask = status & DPLL_PORTB_READY_MASK;
3636                 if (mask == 0xf)
3637                         mask = 0x0;
3638                 else
3639                         dev_priv->chv_phy_control |=
3640                                 PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0);
3641
3642                 dev_priv->chv_phy_control |=
3643                         PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH0);
3644
3645                 mask = (status & DPLL_PORTC_READY_MASK) >> 4;
3646                 if (mask == 0xf)
3647                         mask = 0x0;
3648                 else
3649                         dev_priv->chv_phy_control |=
3650                                 PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1);
3651
3652                 dev_priv->chv_phy_control |=
3653                         PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH1);
3654
3655                 dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY0);
3656
3657                 dev_priv->chv_phy_assert[DPIO_PHY0] = false;
3658         } else {
3659                 dev_priv->chv_phy_assert[DPIO_PHY0] = true;
3660         }
3661
3662         if (cmn_d->desc->ops->is_enabled(dev_priv, cmn_d)) {
3663                 uint32_t status = I915_READ(DPIO_PHY_STATUS);
3664                 unsigned int mask;
3665
3666                 mask = status & DPLL_PORTD_READY_MASK;
3667
3668                 if (mask == 0xf)
3669                         mask = 0x0;
3670                 else
3671                         dev_priv->chv_phy_control |=
3672                                 PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0);
3673
3674                 dev_priv->chv_phy_control |=
3675                         PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY1, DPIO_CH0);
3676
3677                 dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY1);
3678
3679                 dev_priv->chv_phy_assert[DPIO_PHY1] = false;
3680         } else {
3681                 dev_priv->chv_phy_assert[DPIO_PHY1] = true;
3682         }
3683
3684         I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
3685
3686         DRM_DEBUG_KMS("Initial PHY_CONTROL=0x%08x\n",
3687                       dev_priv->chv_phy_control);
3688 }
3689
3690 static void vlv_cmnlane_wa(struct drm_i915_private *dev_priv)
3691 {
3692         struct i915_power_well *cmn =
3693                 lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
3694         struct i915_power_well *disp2d =
3695                 lookup_power_well(dev_priv, VLV_DISP_PW_DISP2D);
3696
3697         /* If the display might be already active skip this */
3698         if (cmn->desc->ops->is_enabled(dev_priv, cmn) &&
3699             disp2d->desc->ops->is_enabled(dev_priv, disp2d) &&
3700             I915_READ(DPIO_CTL) & DPIO_CMNRST)
3701                 return;
3702
3703         DRM_DEBUG_KMS("toggling display PHY side reset\n");
3704
3705         /* cmnlane needs DPLL registers */
3706         disp2d->desc->ops->enable(dev_priv, disp2d);
3707
3708         /*
3709          * From VLV2A0_DP_eDP_HDMI_DPIO_driver_vbios_notes_11.docx:
3710          * Need to assert and de-assert PHY SB reset by gating the
3711          * common lane power, then un-gating it.
3712          * Simply ungating isn't enough to reset the PHY enough to get
3713          * ports and lanes running.
3714          */
3715         cmn->desc->ops->disable(dev_priv, cmn);
3716 }
3717
3718 static void intel_power_domains_verify_state(struct drm_i915_private *dev_priv);
3719
3720 /**
3721  * intel_power_domains_init_hw - initialize hardware power domain state
3722  * @dev_priv: i915 device instance
3723  * @resume: Called from resume code paths or not
3724  *
3725  * This function initializes the hardware power domain state and enables all
3726  * power wells belonging to the INIT power domain. Power wells in other
3727  * domains (and not in the INIT domain) are referenced or disabled by
3728  * intel_modeset_readout_hw_state(). After that the reference count of each
3729  * power well must match its HW enabled state, see
3730  * intel_power_domains_verify_state().
3731  *
3732  * It will return with power domains disabled (to be enabled later by
3733  * intel_power_domains_enable()) and must be paired with
3734  * intel_power_domains_fini_hw().
3735  */
3736 void intel_power_domains_init_hw(struct drm_i915_private *dev_priv, bool resume)
3737 {
3738         struct i915_power_domains *power_domains = &dev_priv->power_domains;
3739
3740         power_domains->initializing = true;
3741
3742         if (IS_ICELAKE(dev_priv)) {
3743                 icl_display_core_init(dev_priv, resume);
3744         } else if (IS_CANNONLAKE(dev_priv)) {
3745                 cnl_display_core_init(dev_priv, resume);
3746         } else if (IS_GEN9_BC(dev_priv)) {
3747                 skl_display_core_init(dev_priv, resume);
3748         } else if (IS_GEN9_LP(dev_priv)) {
3749                 bxt_display_core_init(dev_priv, resume);
3750         } else if (IS_CHERRYVIEW(dev_priv)) {
3751                 mutex_lock(&power_domains->lock);
3752                 chv_phy_control_init(dev_priv);
3753                 mutex_unlock(&power_domains->lock);
3754         } else if (IS_VALLEYVIEW(dev_priv)) {
3755                 mutex_lock(&power_domains->lock);
3756                 vlv_cmnlane_wa(dev_priv);
3757                 mutex_unlock(&power_domains->lock);
3758         }
3759
3760         /*
3761          * Keep all power wells enabled for any dependent HW access during
3762          * initialization and to make sure we keep BIOS enabled display HW
3763          * resources powered until display HW readout is complete. We drop
3764          * this reference in intel_power_domains_enable().
3765          */
3766         intel_display_power_get(dev_priv, POWER_DOMAIN_INIT);
3767         /* Disable power support if the user asked so. */
3768         if (!i915_modparams.disable_power_well)
3769                 intel_display_power_get(dev_priv, POWER_DOMAIN_INIT);
3770         intel_power_domains_sync_hw(dev_priv);
3771
3772         power_domains->initializing = false;
3773 }
3774
3775 /**
3776  * intel_power_domains_fini_hw - deinitialize hw power domain state
3777  * @dev_priv: i915 device instance
3778  *
3779  * De-initializes the display power domain HW state. It also ensures that the
3780  * device stays powered up so that the driver can be reloaded.
3781  *
3782  * It must be called with power domains already disabled (after a call to
3783  * intel_power_domains_disable()) and must be paired with
3784  * intel_power_domains_init_hw().
3785  */
3786 void intel_power_domains_fini_hw(struct drm_i915_private *dev_priv)
3787 {
3788         /* Keep the power well enabled, but cancel its rpm wakeref. */
3789         intel_runtime_pm_put(dev_priv);
3790
3791         /* Remove the refcount we took to keep power well support disabled. */
3792         if (!i915_modparams.disable_power_well)
3793                 intel_display_power_put(dev_priv, POWER_DOMAIN_INIT);
3794
3795         intel_power_domains_verify_state(dev_priv);
3796 }
3797
3798 /**
3799  * intel_power_domains_enable - enable toggling of display power wells
3800  * @dev_priv: i915 device instance
3801  *
3802  * Enable the ondemand enabling/disabling of the display power wells. Note that
3803  * power wells not belonging to POWER_DOMAIN_INIT are allowed to be toggled
3804  * only at specific points of the display modeset sequence, thus they are not
3805  * affected by the intel_power_domains_enable()/disable() calls. The purpose
3806  * of these function is to keep the rest of power wells enabled until the end
3807  * of display HW readout (which will acquire the power references reflecting
3808  * the current HW state).
3809  */
3810 void intel_power_domains_enable(struct drm_i915_private *dev_priv)
3811 {
3812         intel_display_power_put(dev_priv, POWER_DOMAIN_INIT);
3813
3814         intel_power_domains_verify_state(dev_priv);
3815 }
3816
3817 /**
3818  * intel_power_domains_disable - disable toggling of display power wells
3819  * @dev_priv: i915 device instance
3820  *
3821  * Disable the ondemand enabling/disabling of the display power wells. See
3822  * intel_power_domains_enable() for which power wells this call controls.
3823  */
3824 void intel_power_domains_disable(struct drm_i915_private *dev_priv)
3825 {
3826         intel_display_power_get(dev_priv, POWER_DOMAIN_INIT);
3827
3828         intel_power_domains_verify_state(dev_priv);
3829 }
3830
3831 /**
3832  * intel_power_domains_suspend - suspend power domain state
3833  * @dev_priv: i915 device instance
3834  * @suspend_mode: specifies the target suspend state (idle, mem, hibernation)
3835  *
3836  * This function prepares the hardware power domain state before entering
3837  * system suspend.
3838  *
3839  * It must be called with power domains already disabled (after a call to
3840  * intel_power_domains_disable()) and paired with intel_power_domains_resume().
3841  */
3842 void intel_power_domains_suspend(struct drm_i915_private *dev_priv,
3843                                  enum i915_drm_suspend_mode suspend_mode)
3844 {
3845         struct i915_power_domains *power_domains = &dev_priv->power_domains;
3846
3847         intel_display_power_put(dev_priv, POWER_DOMAIN_INIT);
3848
3849         /*
3850          * In case of suspend-to-idle (aka S0ix) on a DMC platform without DC9
3851          * support don't manually deinit the power domains. This also means the
3852          * CSR/DMC firmware will stay active, it will power down any HW
3853          * resources as required and also enable deeper system power states
3854          * that would be blocked if the firmware was inactive.
3855          */
3856         if (!(dev_priv->csr.allowed_dc_mask & DC_STATE_EN_DC9) &&
3857             suspend_mode == I915_DRM_SUSPEND_IDLE &&
3858             dev_priv->csr.dmc_payload != NULL) {
3859                 intel_power_domains_verify_state(dev_priv);
3860                 return;
3861         }
3862
3863         /*
3864          * Even if power well support was disabled we still want to disable
3865          * power wells if power domains must be deinitialized for suspend.
3866          */
3867         if (!i915_modparams.disable_power_well) {
3868                 intel_display_power_put(dev_priv, POWER_DOMAIN_INIT);
3869                 intel_power_domains_verify_state(dev_priv);
3870         }
3871
3872         if (IS_ICELAKE(dev_priv))
3873                 icl_display_core_uninit(dev_priv);
3874         else if (IS_CANNONLAKE(dev_priv))
3875                 cnl_display_core_uninit(dev_priv);
3876         else if (IS_GEN9_BC(dev_priv))
3877                 skl_display_core_uninit(dev_priv);
3878         else if (IS_GEN9_LP(dev_priv))
3879                 bxt_display_core_uninit(dev_priv);
3880
3881         power_domains->display_core_suspended = true;
3882 }
3883
3884 /**
3885  * intel_power_domains_resume - resume power domain state
3886  * @dev_priv: i915 device instance
3887  *
3888  * This function resume the hardware power domain state during system resume.
3889  *
3890  * It will return with power domain support disabled (to be enabled later by
3891  * intel_power_domains_enable()) and must be paired with
3892  * intel_power_domains_suspend().
3893  */
3894 void intel_power_domains_resume(struct drm_i915_private *dev_priv)
3895 {
3896         struct i915_power_domains *power_domains = &dev_priv->power_domains;
3897
3898         if (power_domains->display_core_suspended) {
3899                 intel_power_domains_init_hw(dev_priv, true);
3900                 power_domains->display_core_suspended = false;
3901         } else {
3902                 intel_display_power_get(dev_priv, POWER_DOMAIN_INIT);
3903         }
3904
3905         intel_power_domains_verify_state(dev_priv);
3906 }
3907
3908 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
3909
3910 static void intel_power_domains_dump_info(struct drm_i915_private *dev_priv)
3911 {
3912         struct i915_power_domains *power_domains = &dev_priv->power_domains;
3913         struct i915_power_well *power_well;
3914
3915         for_each_power_well(dev_priv, power_well) {
3916                 enum intel_display_power_domain domain;
3917
3918                 DRM_DEBUG_DRIVER("%-25s %d\n",
3919                                  power_well->desc->name, power_well->count);
3920
3921                 for_each_power_domain(domain, power_well->desc->domains)
3922                         DRM_DEBUG_DRIVER("  %-23s %d\n",
3923                                          intel_display_power_domain_str(domain),
3924                                          power_domains->domain_use_count[domain]);
3925         }
3926 }
3927
3928 /**
3929  * intel_power_domains_verify_state - verify the HW/SW state for all power wells
3930  * @dev_priv: i915 device instance
3931  *
3932  * Verify if the reference count of each power well matches its HW enabled
3933  * state and the total refcount of the domains it belongs to. This must be
3934  * called after modeset HW state sanitization, which is responsible for
3935  * acquiring reference counts for any power wells in use and disabling the
3936  * ones left on by BIOS but not required by any active output.
3937  */
3938 static void intel_power_domains_verify_state(struct drm_i915_private *dev_priv)
3939 {
3940         struct i915_power_domains *power_domains = &dev_priv->power_domains;
3941         struct i915_power_well *power_well;
3942         bool dump_domain_info;
3943
3944         mutex_lock(&power_domains->lock);
3945
3946         dump_domain_info = false;
3947         for_each_power_well(dev_priv, power_well) {
3948                 enum intel_display_power_domain domain;
3949                 int domains_count;
3950                 bool enabled;
3951
3952                 /*
3953                  * Power wells not belonging to any domain (like the MISC_IO
3954                  * and PW1 power wells) are under FW control, so ignore them,
3955                  * since their state can change asynchronously.
3956                  */
3957                 if (!power_well->desc->domains)
3958                         continue;
3959
3960                 enabled = power_well->desc->ops->is_enabled(dev_priv,
3961                                                             power_well);
3962                 if ((power_well->count || power_well->desc->always_on) !=
3963                     enabled)
3964                         DRM_ERROR("power well %s state mismatch (refcount %d/enabled %d)",
3965                                   power_well->desc->name,
3966                                   power_well->count, enabled);
3967
3968                 domains_count = 0;
3969                 for_each_power_domain(domain, power_well->desc->domains)
3970                         domains_count += power_domains->domain_use_count[domain];
3971
3972                 if (power_well->count != domains_count) {
3973                         DRM_ERROR("power well %s refcount/domain refcount mismatch "
3974                                   "(refcount %d/domains refcount %d)\n",
3975                                   power_well->desc->name, power_well->count,
3976                                   domains_count);
3977                         dump_domain_info = true;
3978                 }
3979         }
3980
3981         if (dump_domain_info) {
3982                 static bool dumped;
3983
3984                 if (!dumped) {
3985                         intel_power_domains_dump_info(dev_priv);
3986                         dumped = true;
3987                 }
3988         }
3989
3990         mutex_unlock(&power_domains->lock);
3991 }
3992
3993 #else
3994
3995 static void intel_power_domains_verify_state(struct drm_i915_private *dev_priv)
3996 {
3997 }
3998
3999 #endif
4000
4001 /**
4002  * intel_runtime_pm_get - grab a runtime pm reference
4003  * @dev_priv: i915 device instance
4004  *
4005  * This function grabs a device-level runtime pm reference (mostly used for GEM
4006  * code to ensure the GTT or GT is on) and ensures that it is powered up.
4007  *
4008  * Any runtime pm reference obtained by this function must have a symmetric
4009  * call to intel_runtime_pm_put() to release the reference again.
4010  */
4011 void intel_runtime_pm_get(struct drm_i915_private *dev_priv)
4012 {
4013         struct pci_dev *pdev = dev_priv->drm.pdev;
4014         struct device *kdev = &pdev->dev;
4015         int ret;
4016
4017         ret = pm_runtime_get_sync(kdev);
4018         WARN_ONCE(ret < 0, "pm_runtime_get_sync() failed: %d\n", ret);
4019
4020         atomic_inc(&dev_priv->runtime_pm.wakeref_count);
4021         assert_rpm_wakelock_held(dev_priv);
4022 }
4023
4024 /**
4025  * intel_runtime_pm_get_if_in_use - grab a runtime pm reference if device in use
4026  * @dev_priv: i915 device instance
4027  *
4028  * This function grabs a device-level runtime pm reference if the device is
4029  * already in use and ensures that it is powered up. It is illegal to try
4030  * and access the HW should intel_runtime_pm_get_if_in_use() report failure.
4031  *
4032  * Any runtime pm reference obtained by this function must have a symmetric
4033  * call to intel_runtime_pm_put() to release the reference again.
4034  *
4035  * Returns: True if the wakeref was acquired, or False otherwise.
4036  */
4037 bool intel_runtime_pm_get_if_in_use(struct drm_i915_private *dev_priv)
4038 {
4039         if (IS_ENABLED(CONFIG_PM)) {
4040                 struct pci_dev *pdev = dev_priv->drm.pdev;
4041                 struct device *kdev = &pdev->dev;
4042
4043                 /*
4044                  * In cases runtime PM is disabled by the RPM core and we get
4045                  * an -EINVAL return value we are not supposed to call this
4046                  * function, since the power state is undefined. This applies
4047                  * atm to the late/early system suspend/resume handlers.
4048                  */
4049                 if (pm_runtime_get_if_in_use(kdev) <= 0)
4050                         return false;
4051         }
4052
4053         atomic_inc(&dev_priv->runtime_pm.wakeref_count);
4054         assert_rpm_wakelock_held(dev_priv);
4055
4056         return true;
4057 }
4058
4059 /**
4060  * intel_runtime_pm_get_noresume - grab a runtime pm reference
4061  * @dev_priv: i915 device instance
4062  *
4063  * This function grabs a device-level runtime pm reference (mostly used for GEM
4064  * code to ensure the GTT or GT is on).
4065  *
4066  * It will _not_ power up the device but instead only check that it's powered
4067  * on.  Therefore it is only valid to call this functions from contexts where
4068  * the device is known to be powered up and where trying to power it up would
4069  * result in hilarity and deadlocks. That pretty much means only the system
4070  * suspend/resume code where this is used to grab runtime pm references for
4071  * delayed setup down in work items.
4072  *
4073  * Any runtime pm reference obtained by this function must have a symmetric
4074  * call to intel_runtime_pm_put() to release the reference again.
4075  */
4076 void intel_runtime_pm_get_noresume(struct drm_i915_private *dev_priv)
4077 {
4078         struct pci_dev *pdev = dev_priv->drm.pdev;
4079         struct device *kdev = &pdev->dev;
4080
4081         assert_rpm_wakelock_held(dev_priv);
4082         pm_runtime_get_noresume(kdev);
4083
4084         atomic_inc(&dev_priv->runtime_pm.wakeref_count);
4085 }
4086
4087 /**
4088  * intel_runtime_pm_put - release a runtime pm reference
4089  * @dev_priv: i915 device instance
4090  *
4091  * This function drops the device-level runtime pm reference obtained by
4092  * intel_runtime_pm_get() and might power down the corresponding
4093  * hardware block right away if this is the last reference.
4094  */
4095 void intel_runtime_pm_put(struct drm_i915_private *dev_priv)
4096 {
4097         struct pci_dev *pdev = dev_priv->drm.pdev;
4098         struct device *kdev = &pdev->dev;
4099
4100         assert_rpm_wakelock_held(dev_priv);
4101         atomic_dec(&dev_priv->runtime_pm.wakeref_count);
4102
4103         pm_runtime_mark_last_busy(kdev);
4104         pm_runtime_put_autosuspend(kdev);
4105 }
4106
4107 /**
4108  * intel_runtime_pm_enable - enable runtime pm
4109  * @dev_priv: i915 device instance
4110  *
4111  * This function enables runtime pm at the end of the driver load sequence.
4112  *
4113  * Note that this function does currently not enable runtime pm for the
4114  * subordinate display power domains. That is done by
4115  * intel_power_domains_enable().
4116  */
4117 void intel_runtime_pm_enable(struct drm_i915_private *dev_priv)
4118 {
4119         struct pci_dev *pdev = dev_priv->drm.pdev;
4120         struct device *kdev = &pdev->dev;
4121
4122         /*
4123          * Disable the system suspend direct complete optimization, which can
4124          * leave the device suspended skipping the driver's suspend handlers
4125          * if the device was already runtime suspended. This is needed due to
4126          * the difference in our runtime and system suspend sequence and
4127          * becaue the HDA driver may require us to enable the audio power
4128          * domain during system suspend.
4129          */
4130         dev_pm_set_driver_flags(kdev, DPM_FLAG_NEVER_SKIP);
4131
4132         pm_runtime_set_autosuspend_delay(kdev, 10000); /* 10s */
4133         pm_runtime_mark_last_busy(kdev);
4134
4135         /*
4136          * Take a permanent reference to disable the RPM functionality and drop
4137          * it only when unloading the driver. Use the low level get/put helpers,
4138          * so the driver's own RPM reference tracking asserts also work on
4139          * platforms without RPM support.
4140          */
4141         if (!HAS_RUNTIME_PM(dev_priv)) {
4142                 int ret;
4143
4144                 pm_runtime_dont_use_autosuspend(kdev);
4145                 ret = pm_runtime_get_sync(kdev);
4146                 WARN(ret < 0, "pm_runtime_get_sync() failed: %d\n", ret);
4147         } else {
4148                 pm_runtime_use_autosuspend(kdev);
4149         }
4150
4151         /*
4152          * The core calls the driver load handler with an RPM reference held.
4153          * We drop that here and will reacquire it during unloading in
4154          * intel_power_domains_fini().
4155          */
4156         pm_runtime_put_autosuspend(kdev);
4157 }
4158
4159 void intel_runtime_pm_disable(struct drm_i915_private *dev_priv)
4160 {
4161         struct pci_dev *pdev = dev_priv->drm.pdev;
4162         struct device *kdev = &pdev->dev;
4163
4164         /* Transfer rpm ownership back to core */
4165         WARN(pm_runtime_get_sync(&dev_priv->drm.pdev->dev) < 0,
4166              "Failed to pass rpm ownership back to core\n");
4167
4168         pm_runtime_dont_use_autosuspend(kdev);
4169
4170         if (!HAS_RUNTIME_PM(dev_priv))
4171                 pm_runtime_put(kdev);
4172 }