1// SPDX-License-Identifier: MIT 2/* 3 * Copyright �� 2022 Intel Corporation 4 */ 5 6#include "i915_drv.h" 7#include "i915_irq.h" 8#include "i915_reg.h" 9#include "intel_backlight_regs.h" 10#include "intel_combo_phy.h" 11#include "intel_combo_phy_regs.h" 12#include "intel_crt.h" 13#include "intel_de.h" 14#include "intel_display_irq.h" 15#include "intel_display_power_well.h" 16#include "intel_display_types.h" 17#include "intel_dkl_phy.h" 18#include "intel_dkl_phy_regs.h" 19#include "intel_dmc.h" 20#include "intel_dp_aux_regs.h" 21#include "intel_dpio_phy.h" 22#include "intel_dpll.h" 23#include "intel_hotplug.h" 24#include "intel_pcode.h" 25#include "intel_pps.h" 26#include "intel_tc.h" 27#include "intel_vga.h" 28#include "skl_watermark.h" 29#include "vlv_sideband.h" 30#include "vlv_sideband_reg.h" 31 32struct i915_power_well_regs { 33 i915_reg_t bios; 34 i915_reg_t driver; 35 i915_reg_t kvmr; 36 i915_reg_t debug; 37}; 38 39struct i915_power_well_ops { 40 const struct i915_power_well_regs *regs; 41 /* 42 * Synchronize the well's hw state to match the current sw state, for 43 * example enable/disable it based on the current refcount. Called 44 * during driver init and resume time, possibly after first calling 45 * the enable/disable handlers. 46 */ 47 void (*sync_hw)(struct drm_i915_private *i915, 48 struct i915_power_well *power_well); 49 /* 50 * Enable the well and resources that depend on it (for example 51 * interrupts located on the well). Called after the 0->1 refcount 52 * transition. 53 */ 54 void (*enable)(struct drm_i915_private *i915, 55 struct i915_power_well *power_well); 56 /* 57 * Disable the well and resources that depend on it. Called after 58 * the 1->0 refcount transition. 59 */ 60 void (*disable)(struct drm_i915_private *i915, 61 struct i915_power_well *power_well); 62 /* Returns the hw enabled state. */ 63 bool (*is_enabled)(struct drm_i915_private *i915, 64 struct i915_power_well *power_well); 65}; 66 67static const struct i915_power_well_instance * 68i915_power_well_instance(const struct i915_power_well *power_well) 69{ 70 return &power_well->desc->instances->list[power_well->instance_idx]; 71} 72 73struct i915_power_well * 74lookup_power_well(struct drm_i915_private *i915, 75 enum i915_power_well_id power_well_id) 76{ 77 struct i915_power_well *power_well; 78 79 for_each_power_well(i915, power_well) 80 if (i915_power_well_instance(power_well)->id == power_well_id) 81 return power_well; 82 83 /* 84 * It's not feasible to add error checking code to the callers since 85 * this condition really shouldn't happen and it doesn't even make sense 86 * to abort things like display initialization sequences. Just return 87 * the first power well and hope the WARN gets reported so we can fix 88 * our driver. 89 */ 90 drm_WARN(&i915->drm, 1, 91 "Power well %d not defined for this platform\n", 92 power_well_id); 93 return &i915->display.power.domains.power_wells[0]; 94} 95 96void intel_power_well_enable(struct drm_i915_private *i915, 97 struct i915_power_well *power_well) 98{ 99 drm_dbg_kms(&i915->drm, "enabling %s\n", intel_power_well_name(power_well)); 100 power_well->desc->ops->enable(i915, power_well); 101 power_well->hw_enabled = true; 102} 103 104void intel_power_well_disable(struct drm_i915_private *i915, 105 struct i915_power_well *power_well) 106{ 107 drm_dbg_kms(&i915->drm, "disabling %s\n", intel_power_well_name(power_well)); 108 power_well->hw_enabled = false; 109 power_well->desc->ops->disable(i915, power_well); 110} 111 112void intel_power_well_sync_hw(struct drm_i915_private *i915, 113 struct i915_power_well *power_well) 114{ 115 power_well->desc->ops->sync_hw(i915, power_well); 116 power_well->hw_enabled = 117 power_well->desc->ops->is_enabled(i915, power_well); 118} 119 120void intel_power_well_get(struct drm_i915_private *i915, 121 struct i915_power_well *power_well) 122{ 123 if (!power_well->count++) 124 intel_power_well_enable(i915, power_well); 125} 126 127void intel_power_well_put(struct drm_i915_private *i915, 128 struct i915_power_well *power_well) 129{ 130 drm_WARN(&i915->drm, !power_well->count, 131 "Use count on power well %s is already zero", 132 i915_power_well_instance(power_well)->name); 133 134 if (!--power_well->count) 135 intel_power_well_disable(i915, power_well); 136} 137 138bool intel_power_well_is_enabled(struct drm_i915_private *i915, 139 struct i915_power_well *power_well) 140{ 141 return power_well->desc->ops->is_enabled(i915, power_well); 142} 143 144bool intel_power_well_is_enabled_cached(struct i915_power_well *power_well) 145{ 146 return power_well->hw_enabled; 147} 148 149bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv, 150 enum i915_power_well_id power_well_id) 151{ 152 struct i915_power_well *power_well; 153 154 power_well = lookup_power_well(dev_priv, power_well_id); 155 156 return intel_power_well_is_enabled(dev_priv, power_well); 157} 158 159bool intel_power_well_is_always_on(struct i915_power_well *power_well) 160{ 161 return power_well->desc->always_on; 162} 163 164const char *intel_power_well_name(struct i915_power_well *power_well) 165{ 166 return i915_power_well_instance(power_well)->name; 167} 168 169struct intel_power_domain_mask *intel_power_well_domains(struct i915_power_well *power_well) 170{ 171 return &power_well->domains; 172} 173 174int intel_power_well_refcount(struct i915_power_well *power_well) 175{ 176 return power_well->count; 177} 178 179/* 180 * Starting with Haswell, we have a "Power Down Well" that can be turned off 181 * when not needed anymore. We have 4 registers that can request the power well 182 * to be enabled, and it will only be disabled if none of the registers is 183 * requesting it to be enabled. 184 */ 185static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv, 186 u8 irq_pipe_mask, bool has_vga) 187{ 188 if (has_vga) 189 intel_vga_reset_io_mem(dev_priv); 190 191 if (irq_pipe_mask) 192 gen8_irq_power_well_post_enable(dev_priv, irq_pipe_mask); 193} 194 195static void hsw_power_well_pre_disable(struct drm_i915_private *dev_priv, 196 u8 irq_pipe_mask) 197{ 198 if (irq_pipe_mask) 199 gen8_irq_power_well_pre_disable(dev_priv, irq_pipe_mask); 200} 201 202#define ICL_AUX_PW_TO_CH(pw_idx) \ 203 ((pw_idx) - ICL_PW_CTL_IDX_AUX_A + AUX_CH_A) 204 205#define ICL_TBT_AUX_PW_TO_CH(pw_idx) \ 206 ((pw_idx) - ICL_PW_CTL_IDX_AUX_TBT1 + AUX_CH_C) 207 208static enum aux_ch icl_aux_pw_to_ch(const struct i915_power_well *power_well) 209{ 210 int pw_idx = i915_power_well_instance(power_well)->hsw.idx; 211 212 return power_well->desc->is_tc_tbt ? ICL_TBT_AUX_PW_TO_CH(pw_idx) : 213 ICL_AUX_PW_TO_CH(pw_idx); 214} 215 216static struct intel_digital_port * 217aux_ch_to_digital_port(struct drm_i915_private *dev_priv, 218 enum aux_ch aux_ch) 219{ 220 struct intel_digital_port *dig_port = NULL; 221 struct intel_encoder *encoder; 222 223 for_each_intel_encoder(&dev_priv->drm, encoder) { 224 /* We'll check the MST primary port */ 225 if (encoder->type == INTEL_OUTPUT_DP_MST) 226 continue; 227 228 dig_port = enc_to_dig_port(encoder); 229 if (!dig_port) 230 continue; 231 232 if (dig_port->aux_ch != aux_ch) { 233 dig_port = NULL; 234 continue; 235 } 236 237 break; 238 } 239 240 return dig_port; 241} 242 243static enum phy icl_aux_pw_to_phy(struct drm_i915_private *i915, 244 const struct i915_power_well *power_well) 245{ 246 enum aux_ch aux_ch = icl_aux_pw_to_ch(power_well); 247 struct intel_digital_port *dig_port = aux_ch_to_digital_port(i915, aux_ch); 248 249 /* 250 * FIXME should we care about the (VBT defined) dig_port->aux_ch 251 * relationship or should this be purely defined by the hardware layout? 252 * Currently if the port doesn't appear in the VBT, or if it's declared 253 * as HDMI-only and routed to a combo PHY, the encoder either won't be 254 * present at all or it will not have an aux_ch assigned. 255 */ 256 return dig_port ? intel_port_to_phy(i915, dig_port->base.port) : PHY_NONE; 257} 258 259static void hsw_wait_for_power_well_enable(struct drm_i915_private *dev_priv, 260 struct i915_power_well *power_well, 261 bool timeout_expected) 262{ 263 const struct i915_power_well_regs *regs = power_well->desc->ops->regs; 264 int pw_idx = i915_power_well_instance(power_well)->hsw.idx; 265 int timeout = power_well->desc->enable_timeout ? : 1; 266 267 /* 268 * For some power wells we're not supposed to watch the status bit for 269 * an ack, but rather just wait a fixed amount of time and then 270 * proceed. This is only used on DG2. 271 */ 272 if (IS_DG2(dev_priv) && power_well->desc->fixed_enable_delay) { 273 usleep_range(600, 1200); 274 return; 275 } 276 277 /* Timeout for PW1:10 us, AUX:not specified, other PWs:20 us. */ 278 if (intel_de_wait_for_set(dev_priv, regs->driver, 279 HSW_PWR_WELL_CTL_STATE(pw_idx), timeout)) { 280 drm_dbg_kms(&dev_priv->drm, "%s power well enable timeout\n", 281 intel_power_well_name(power_well)); 282 283 drm_WARN_ON(&dev_priv->drm, !timeout_expected); 284 285 } 286} 287 288static u32 hsw_power_well_requesters(struct drm_i915_private *dev_priv, 289 const struct i915_power_well_regs *regs, 290 int pw_idx) 291{ 292 u32 req_mask = HSW_PWR_WELL_CTL_REQ(pw_idx); 293 u32 ret; 294 295 ret = intel_de_read(dev_priv, regs->bios) & req_mask ? 1 : 0; 296 ret |= intel_de_read(dev_priv, regs->driver) & req_mask ? 2 : 0; 297 if (regs->kvmr.reg) 298 ret |= intel_de_read(dev_priv, regs->kvmr) & req_mask ? 4 : 0; 299 ret |= intel_de_read(dev_priv, regs->debug) & req_mask ? 8 : 0; 300 301 return ret; 302} 303 304static void hsw_wait_for_power_well_disable(struct drm_i915_private *dev_priv, 305 struct i915_power_well *power_well) 306{ 307 const struct i915_power_well_regs *regs = power_well->desc->ops->regs; 308 int pw_idx = i915_power_well_instance(power_well)->hsw.idx; 309 bool disabled; 310 u32 reqs; 311 312 /* 313 * Bspec doesn't require waiting for PWs to get disabled, but still do 314 * this for paranoia. The known cases where a PW will be forced on: 315 * - a KVMR request on any power well via the KVMR request register 316 * - a DMC request on PW1 and MISC_IO power wells via the BIOS and 317 * DEBUG request registers 318 * Skip the wait in case any of the request bits are set and print a 319 * diagnostic message. 320 */ 321 wait_for((disabled = !(intel_de_read(dev_priv, regs->driver) & 322 HSW_PWR_WELL_CTL_STATE(pw_idx))) || 323 (reqs = hsw_power_well_requesters(dev_priv, regs, pw_idx)), 1); 324 if (disabled) 325 return; 326 327 drm_dbg_kms(&dev_priv->drm, 328 "%s forced on (bios:%d driver:%d kvmr:%d debug:%d)\n", 329 intel_power_well_name(power_well), 330 !!(reqs & 1), !!(reqs & 2), !!(reqs & 4), !!(reqs & 8)); 331} 332 333static void gen9_wait_for_power_well_fuses(struct drm_i915_private *dev_priv, 334 enum skl_power_gate pg) 335{ 336 /* Timeout 5us for PG#0, for other PGs 1us */ 337 drm_WARN_ON(&dev_priv->drm, 338 intel_de_wait_for_set(dev_priv, SKL_FUSE_STATUS, 339 SKL_FUSE_PG_DIST_STATUS(pg), 1)); 340} 341 342static void hsw_power_well_enable(struct drm_i915_private *dev_priv, 343 struct i915_power_well *power_well) 344{ 345 const struct i915_power_well_regs *regs = power_well->desc->ops->regs; 346 int pw_idx = i915_power_well_instance(power_well)->hsw.idx; 347 348 if (power_well->desc->has_fuses) { 349 enum skl_power_gate pg; 350 351 pg = DISPLAY_VER(dev_priv) >= 11 ? ICL_PW_CTL_IDX_TO_PG(pw_idx) : 352 SKL_PW_CTL_IDX_TO_PG(pw_idx); 353 354 /* Wa_16013190616:adlp */ 355 if (IS_ALDERLAKE_P(dev_priv) && pg == SKL_PG1) 356 intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1, 0, DISABLE_FLR_SRC); 357 358 /* 359 * For PW1 we have to wait both for the PW0/PG0 fuse state 360 * before enabling the power well and PW1/PG1's own fuse 361 * state after the enabling. For all other power wells with 362 * fuses we only have to wait for that PW/PG's fuse state 363 * after the enabling. 364 */ 365 if (pg == SKL_PG1) 366 gen9_wait_for_power_well_fuses(dev_priv, SKL_PG0); 367 } 368 369 intel_de_rmw(dev_priv, regs->driver, 0, HSW_PWR_WELL_CTL_REQ(pw_idx)); 370 371 hsw_wait_for_power_well_enable(dev_priv, power_well, false); 372 373 if (power_well->desc->has_fuses) { 374 enum skl_power_gate pg; 375 376 pg = DISPLAY_VER(dev_priv) >= 11 ? ICL_PW_CTL_IDX_TO_PG(pw_idx) : 377 SKL_PW_CTL_IDX_TO_PG(pw_idx); 378 gen9_wait_for_power_well_fuses(dev_priv, pg); 379 } 380 381 hsw_power_well_post_enable(dev_priv, 382 power_well->desc->irq_pipe_mask, 383 power_well->desc->has_vga); 384} 385 386static void hsw_power_well_disable(struct drm_i915_private *dev_priv, 387 struct i915_power_well *power_well) 388{ 389 const struct i915_power_well_regs *regs = power_well->desc->ops->regs; 390 int pw_idx = i915_power_well_instance(power_well)->hsw.idx; 391 392 hsw_power_well_pre_disable(dev_priv, 393 power_well->desc->irq_pipe_mask); 394 395 intel_de_rmw(dev_priv, regs->driver, HSW_PWR_WELL_CTL_REQ(pw_idx), 0); 396 hsw_wait_for_power_well_disable(dev_priv, power_well); 397} 398 399static bool intel_port_is_edp(struct drm_i915_private *i915, enum port port) 400{ 401 struct intel_encoder *encoder; 402 403 for_each_intel_encoder(&i915->drm, encoder) { 404 if (encoder->type == INTEL_OUTPUT_EDP && 405 encoder->port == port) 406 return true; 407 } 408 409 return false; 410} 411 412static void 413icl_combo_phy_aux_power_well_enable(struct drm_i915_private *dev_priv, 414 struct i915_power_well *power_well) 415{ 416 const struct i915_power_well_regs *regs = power_well->desc->ops->regs; 417 int pw_idx = i915_power_well_instance(power_well)->hsw.idx; 418 enum phy phy = icl_aux_pw_to_phy(dev_priv, power_well); 419 420 drm_WARN_ON(&dev_priv->drm, !IS_ICELAKE(dev_priv)); 421 422 intel_de_rmw(dev_priv, regs->driver, 0, HSW_PWR_WELL_CTL_REQ(pw_idx)); 423 424 /* FIXME this is a mess */ 425 if (phy != PHY_NONE) 426 intel_de_rmw(dev_priv, ICL_PORT_CL_DW12(phy), 427 0, ICL_LANE_ENABLE_AUX); 428 429 hsw_wait_for_power_well_enable(dev_priv, power_well, false); 430 431 /* Display WA #1178: icl */ 432 if (pw_idx >= ICL_PW_CTL_IDX_AUX_A && pw_idx <= ICL_PW_CTL_IDX_AUX_B && 433 !intel_port_is_edp(dev_priv, (enum port)phy)) 434 intel_de_rmw(dev_priv, ICL_AUX_ANAOVRD1(pw_idx), 435 0, ICL_AUX_ANAOVRD1_ENABLE | ICL_AUX_ANAOVRD1_LDO_BYPASS); 436} 437 438static void 439icl_combo_phy_aux_power_well_disable(struct drm_i915_private *dev_priv, 440 struct i915_power_well *power_well) 441{ 442 const struct i915_power_well_regs *regs = power_well->desc->ops->regs; 443 int pw_idx = i915_power_well_instance(power_well)->hsw.idx; 444 enum phy phy = icl_aux_pw_to_phy(dev_priv, power_well); 445 446 drm_WARN_ON(&dev_priv->drm, !IS_ICELAKE(dev_priv)); 447 448 /* FIXME this is a mess */ 449 if (phy != PHY_NONE) 450 intel_de_rmw(dev_priv, ICL_PORT_CL_DW12(phy), 451 ICL_LANE_ENABLE_AUX, 0); 452 453 intel_de_rmw(dev_priv, regs->driver, HSW_PWR_WELL_CTL_REQ(pw_idx), 0); 454 455 hsw_wait_for_power_well_disable(dev_priv, power_well); 456} 457 458#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM) 459 460static void icl_tc_port_assert_ref_held(struct drm_i915_private *dev_priv, 461 struct i915_power_well *power_well, 462 struct intel_digital_port *dig_port) 463{ 464 if (drm_WARN_ON(&dev_priv->drm, !dig_port)) 465 return; 466 467 if (DISPLAY_VER(dev_priv) == 11 && intel_tc_cold_requires_aux_pw(dig_port)) 468 return; 469 470 drm_WARN_ON(&dev_priv->drm, !intel_tc_port_ref_held(dig_port)); 471} 472 473#else 474 475static void icl_tc_port_assert_ref_held(struct drm_i915_private *dev_priv, 476 struct i915_power_well *power_well, 477 struct intel_digital_port *dig_port) 478{ 479} 480 481#endif 482 483#define TGL_AUX_PW_TO_TC_PORT(pw_idx) ((pw_idx) - TGL_PW_CTL_IDX_AUX_TC1) 484 485static void icl_tc_cold_exit(struct drm_i915_private *i915) 486{ 487 int ret, tries = 0; 488 489 while (1) { 490 ret = snb_pcode_write_timeout(&i915->uncore, ICL_PCODE_EXIT_TCCOLD, 0, 491 250, 1); 492 if (ret != -EAGAIN || ++tries == 3) 493 break; 494 msleep(1); 495 } 496 497 /* Spec states that TC cold exit can take up to 1ms to complete */ 498 if (!ret) 499 msleep(1); 500 501 /* TODO: turn failure into a error as soon i915 CI updates ICL IFWI */ 502 drm_dbg_kms(&i915->drm, "TC cold block %s\n", ret ? "failed" : 503 "succeeded"); 504} 505 506static void 507icl_tc_phy_aux_power_well_enable(struct drm_i915_private *dev_priv, 508 struct i915_power_well *power_well) 509{ 510 enum aux_ch aux_ch = icl_aux_pw_to_ch(power_well); 511 struct intel_digital_port *dig_port = aux_ch_to_digital_port(dev_priv, aux_ch); 512 const struct i915_power_well_regs *regs = power_well->desc->ops->regs; 513 bool is_tbt = power_well->desc->is_tc_tbt; 514 bool timeout_expected; 515 516 icl_tc_port_assert_ref_held(dev_priv, power_well, dig_port); 517 518 intel_de_rmw(dev_priv, DP_AUX_CH_CTL(aux_ch), 519 DP_AUX_CH_CTL_TBT_IO, is_tbt ? DP_AUX_CH_CTL_TBT_IO : 0); 520 521 intel_de_rmw(dev_priv, regs->driver, 522 0, 523 HSW_PWR_WELL_CTL_REQ(i915_power_well_instance(power_well)->hsw.idx)); 524 525 /* 526 * An AUX timeout is expected if the TBT DP tunnel is down, 527 * or need to enable AUX on a legacy TypeC port as part of the TC-cold 528 * exit sequence. 529 */ 530 timeout_expected = is_tbt || intel_tc_cold_requires_aux_pw(dig_port); 531 if (DISPLAY_VER(dev_priv) == 11 && intel_tc_cold_requires_aux_pw(dig_port)) 532 icl_tc_cold_exit(dev_priv); 533 534 hsw_wait_for_power_well_enable(dev_priv, power_well, timeout_expected); 535 536 if (DISPLAY_VER(dev_priv) >= 12 && !is_tbt) { 537 enum tc_port tc_port; 538 539 tc_port = TGL_AUX_PW_TO_TC_PORT(i915_power_well_instance(power_well)->hsw.idx); 540 541 if (wait_for(intel_dkl_phy_read(dev_priv, DKL_CMN_UC_DW_27(tc_port)) & 542 DKL_CMN_UC_DW27_UC_HEALTH, 1)) 543 drm_warn(&dev_priv->drm, 544 "Timeout waiting TC uC health\n"); 545 } 546} 547 548static void 549icl_aux_power_well_enable(struct drm_i915_private *dev_priv, 550 struct i915_power_well *power_well) 551{ 552 enum phy phy = icl_aux_pw_to_phy(dev_priv, power_well); 553 554 if (intel_phy_is_tc(dev_priv, phy)) 555 return icl_tc_phy_aux_power_well_enable(dev_priv, power_well); 556 else if (IS_ICELAKE(dev_priv)) 557 return icl_combo_phy_aux_power_well_enable(dev_priv, 558 power_well); 559 else 560 return hsw_power_well_enable(dev_priv, power_well); 561} 562 563static void 564icl_aux_power_well_disable(struct drm_i915_private *dev_priv, 565 struct i915_power_well *power_well) 566{ 567 enum phy phy = icl_aux_pw_to_phy(dev_priv, power_well); 568 569 if (intel_phy_is_tc(dev_priv, phy)) 570 return hsw_power_well_disable(dev_priv, power_well); 571 else if (IS_ICELAKE(dev_priv)) 572 return icl_combo_phy_aux_power_well_disable(dev_priv, 573 power_well); 574 else 575 return hsw_power_well_disable(dev_priv, power_well); 576} 577 578/* 579 * We should only use the power well if we explicitly asked the hardware to 580 * enable it, so check if it's enabled and also check if we've requested it to 581 * be enabled. 582 */ 583static bool hsw_power_well_enabled(struct drm_i915_private *dev_priv, 584 struct i915_power_well *power_well) 585{ 586 const struct i915_power_well_regs *regs = power_well->desc->ops->regs; 587 enum i915_power_well_id id = i915_power_well_instance(power_well)->id; 588 int pw_idx = i915_power_well_instance(power_well)->hsw.idx; 589 u32 mask = HSW_PWR_WELL_CTL_REQ(pw_idx) | 590 HSW_PWR_WELL_CTL_STATE(pw_idx); 591 u32 val; 592 593 val = intel_de_read(dev_priv, regs->driver); 594 595 /* 596 * On GEN9 big core due to a DMC bug the driver's request bits for PW1 597 * and the MISC_IO PW will be not restored, so check instead for the 598 * BIOS's own request bits, which are forced-on for these power wells 599 * when exiting DC5/6. 600 */ 601 if (DISPLAY_VER(dev_priv) == 9 && !IS_BROXTON(dev_priv) && 602 (id == SKL_DISP_PW_1 || id == SKL_DISP_PW_MISC_IO)) 603 val |= intel_de_read(dev_priv, regs->bios); 604 605 return (val & mask) == mask; 606} 607 608static void assert_can_enable_dc9(struct drm_i915_private *dev_priv) 609{ 610 drm_WARN_ONCE(&dev_priv->drm, 611 (intel_de_read(dev_priv, DC_STATE_EN) & DC_STATE_EN_DC9), 612 "DC9 already programmed to be enabled.\n"); 613 drm_WARN_ONCE(&dev_priv->drm, 614 intel_de_read(dev_priv, DC_STATE_EN) & 615 DC_STATE_EN_UPTO_DC5, 616 "DC5 still not disabled to enable DC9.\n"); 617 drm_WARN_ONCE(&dev_priv->drm, 618 intel_de_read(dev_priv, HSW_PWR_WELL_CTL2) & 619 HSW_PWR_WELL_CTL_REQ(SKL_PW_CTL_IDX_PW_2), 620 "Power well 2 on.\n"); 621 drm_WARN_ONCE(&dev_priv->drm, intel_irqs_enabled(dev_priv), 622 "Interrupts not disabled yet.\n"); 623 624 /* 625 * TODO: check for the following to verify the conditions to enter DC9 626 * state are satisfied: 627 * 1] Check relevant display engine registers to verify if mode set 628 * disable sequence was followed. 629 * 2] Check if display uninitialize sequence is initialized. 630 */ 631} 632 633static void assert_can_disable_dc9(struct drm_i915_private *dev_priv) 634{ 635 drm_WARN_ONCE(&dev_priv->drm, intel_irqs_enabled(dev_priv), 636 "Interrupts not disabled yet.\n"); 637 drm_WARN_ONCE(&dev_priv->drm, 638 intel_de_read(dev_priv, DC_STATE_EN) & 639 DC_STATE_EN_UPTO_DC5, 640 "DC5 still not disabled.\n"); 641 642 /* 643 * TODO: check for the following to verify DC9 state was indeed 644 * entered before programming to disable it: 645 * 1] Check relevant display engine registers to verify if mode 646 * set disable sequence was followed. 647 * 2] Check if display uninitialize sequence is initialized. 648 */ 649} 650 651static void gen9_write_dc_state(struct drm_i915_private *dev_priv, 652 u32 state) 653{ 654 int rewrites = 0; 655 int rereads = 0; 656 u32 v; 657 658 intel_de_write(dev_priv, DC_STATE_EN, state); 659 660 /* It has been observed that disabling the dc6 state sometimes 661 * doesn't stick and dmc keeps returning old value. Make sure 662 * the write really sticks enough times and also force rewrite until 663 * we are confident that state is exactly what we want. 664 */ 665 do { 666 v = intel_de_read(dev_priv, DC_STATE_EN); 667 668 if (v != state) { 669 intel_de_write(dev_priv, DC_STATE_EN, state); 670 rewrites++; 671 rereads = 0; 672 } else if (rereads++ > 5) { 673 break; 674 } 675 676 } while (rewrites < 100); 677 678 if (v != state) 679 drm_err(&dev_priv->drm, 680 "Writing dc state to 0x%x failed, now 0x%x\n", 681 state, v); 682 683 /* Most of the times we need one retry, avoid spam */ 684 if (rewrites > 1) 685 drm_dbg_kms(&dev_priv->drm, 686 "Rewrote dc state to 0x%x %d times\n", 687 state, rewrites); 688} 689 690static u32 gen9_dc_mask(struct drm_i915_private *dev_priv) 691{ 692 u32 mask; 693 694 mask = DC_STATE_EN_UPTO_DC5; 695 696 if (DISPLAY_VER(dev_priv) >= 12) 697 mask |= DC_STATE_EN_DC3CO | DC_STATE_EN_UPTO_DC6 698 | DC_STATE_EN_DC9; 699 else if (DISPLAY_VER(dev_priv) == 11) 700 mask |= DC_STATE_EN_UPTO_DC6 | DC_STATE_EN_DC9; 701 else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) 702 mask |= DC_STATE_EN_DC9; 703 else 704 mask |= DC_STATE_EN_UPTO_DC6; 705 706 return mask; 707} 708 709void gen9_sanitize_dc_state(struct drm_i915_private *i915) 710{ 711 struct i915_power_domains *power_domains = &i915->display.power.domains; 712 u32 val; 713 714 if (!HAS_DISPLAY(i915)) 715 return; 716 717 val = intel_de_read(i915, DC_STATE_EN) & gen9_dc_mask(i915); 718 719 drm_dbg_kms(&i915->drm, 720 "Resetting DC state tracking from %02x to %02x\n", 721 power_domains->dc_state, val); 722 power_domains->dc_state = val; 723} 724 725/** 726 * gen9_set_dc_state - set target display C power state 727 * @dev_priv: i915 device instance 728 * @state: target DC power state 729 * - DC_STATE_DISABLE 730 * - DC_STATE_EN_UPTO_DC5 731 * - DC_STATE_EN_UPTO_DC6 732 * - DC_STATE_EN_DC9 733 * 734 * Signal to DMC firmware/HW the target DC power state passed in @state. 735 * DMC/HW can turn off individual display clocks and power rails when entering 736 * a deeper DC power state (higher in number) and turns these back when exiting 737 * that state to a shallower power state (lower in number). The HW will decide 738 * when to actually enter a given state on an on-demand basis, for instance 739 * depending on the active state of display pipes. The state of display 740 * registers backed by affected power rails are saved/restored as needed. 741 * 742 * Based on the above enabling a deeper DC power state is asynchronous wrt. 743 * enabling it. Disabling a deeper power state is synchronous: for instance 744 * setting %DC_STATE_DISABLE won't complete until all HW resources are turned 745 * back on and register state is restored. This is guaranteed by the MMIO write 746 * to DC_STATE_EN blocking until the state is restored. 747 */ 748void gen9_set_dc_state(struct drm_i915_private *dev_priv, u32 state) 749{ 750 struct i915_power_domains *power_domains = &dev_priv->display.power.domains; 751 u32 val; 752 u32 mask; 753 754 if (!HAS_DISPLAY(dev_priv)) 755 return; 756 757 if (drm_WARN_ON_ONCE(&dev_priv->drm, 758 state & ~power_domains->allowed_dc_mask)) 759 state &= power_domains->allowed_dc_mask; 760 761 val = intel_de_read(dev_priv, DC_STATE_EN); 762 mask = gen9_dc_mask(dev_priv); 763 drm_dbg_kms(&dev_priv->drm, "Setting DC state from %02x to %02x\n", 764 val & mask, state); 765 766 /* Check if DMC is ignoring our DC state requests */ 767 if ((val & mask) != power_domains->dc_state) 768 drm_err(&dev_priv->drm, "DC state mismatch (0x%x -> 0x%x)\n", 769 power_domains->dc_state, val & mask); 770 771 val &= ~mask; 772 val |= state; 773 774 gen9_write_dc_state(dev_priv, val); 775 776 power_domains->dc_state = val & mask; 777} 778 779static void tgl_enable_dc3co(struct drm_i915_private *dev_priv) 780{ 781 drm_dbg_kms(&dev_priv->drm, "Enabling DC3CO\n"); 782 gen9_set_dc_state(dev_priv, DC_STATE_EN_DC3CO); 783} 784 785static void tgl_disable_dc3co(struct drm_i915_private *dev_priv) 786{ 787 drm_dbg_kms(&dev_priv->drm, "Disabling DC3CO\n"); 788 intel_de_rmw(dev_priv, DC_STATE_EN, DC_STATE_DC3CO_STATUS, 0); 789 gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); 790 /* 791 * Delay of 200us DC3CO Exit time B.Spec 49196 792 */ 793 usleep_range(200, 210); 794} 795 796static void assert_can_enable_dc5(struct drm_i915_private *dev_priv) 797{ 798 enum i915_power_well_id high_pg; 799 800 /* Power wells at this level and above must be disabled for DC5 entry */ 801 if (DISPLAY_VER(dev_priv) == 12) 802 high_pg = ICL_DISP_PW_3; 803 else 804 high_pg = SKL_DISP_PW_2; 805 806 drm_WARN_ONCE(&dev_priv->drm, 807 intel_display_power_well_is_enabled(dev_priv, high_pg), 808 "Power wells above platform's DC5 limit still enabled.\n"); 809 810 drm_WARN_ONCE(&dev_priv->drm, 811 (intel_de_read(dev_priv, DC_STATE_EN) & 812 DC_STATE_EN_UPTO_DC5), 813 "DC5 already programmed to be enabled.\n"); 814 assert_rpm_wakelock_held(&dev_priv->runtime_pm); 815 816 assert_dmc_loaded(dev_priv); 817} 818 819void gen9_enable_dc5(struct drm_i915_private *dev_priv) 820{ 821 assert_can_enable_dc5(dev_priv); 822 823 drm_dbg_kms(&dev_priv->drm, "Enabling DC5\n"); 824 825 /* Wa Display #1183: skl,kbl,cfl */ 826 if (DISPLAY_VER(dev_priv) == 9 && !IS_BROXTON(dev_priv)) 827 intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1, 828 0, SKL_SELECT_ALTERNATE_DC_EXIT); 829 830 gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC5); 831} 832 833static void assert_can_enable_dc6(struct drm_i915_private *dev_priv) 834{ 835 drm_WARN_ONCE(&dev_priv->drm, 836 (intel_de_read(dev_priv, UTIL_PIN_CTL) & 837 (UTIL_PIN_ENABLE | UTIL_PIN_MODE_MASK)) == 838 (UTIL_PIN_ENABLE | UTIL_PIN_MODE_PWM), 839 "Utility pin enabled in PWM mode\n"); 840 drm_WARN_ONCE(&dev_priv->drm, 841 (intel_de_read(dev_priv, DC_STATE_EN) & 842 DC_STATE_EN_UPTO_DC6), 843 "DC6 already programmed to be enabled.\n"); 844 845 assert_dmc_loaded(dev_priv); 846} 847 848void skl_enable_dc6(struct drm_i915_private *dev_priv) 849{ 850 assert_can_enable_dc6(dev_priv); 851 852 drm_dbg_kms(&dev_priv->drm, "Enabling DC6\n"); 853 854 /* Wa Display #1183: skl,kbl,cfl */ 855 if (DISPLAY_VER(dev_priv) == 9 && !IS_BROXTON(dev_priv)) 856 intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1, 857 0, SKL_SELECT_ALTERNATE_DC_EXIT); 858 859 gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC6); 860} 861 862void bxt_enable_dc9(struct drm_i915_private *dev_priv) 863{ 864 assert_can_enable_dc9(dev_priv); 865 866 drm_dbg_kms(&dev_priv->drm, "Enabling DC9\n"); 867 /* 868 * Power sequencer reset is not needed on 869 * platforms with South Display Engine on PCH, 870 * because PPS registers are always on. 871 */ 872 if (!HAS_PCH_SPLIT(dev_priv)) 873 intel_pps_reset_all(dev_priv); 874 gen9_set_dc_state(dev_priv, DC_STATE_EN_DC9); 875} 876 877void bxt_disable_dc9(struct drm_i915_private *dev_priv) 878{ 879 assert_can_disable_dc9(dev_priv); 880 881 drm_dbg_kms(&dev_priv->drm, "Disabling DC9\n"); 882 883 gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); 884 885 intel_pps_unlock_regs_wa(dev_priv); 886} 887 888static void hsw_power_well_sync_hw(struct drm_i915_private *dev_priv, 889 struct i915_power_well *power_well) 890{ 891 const struct i915_power_well_regs *regs = power_well->desc->ops->regs; 892 int pw_idx = i915_power_well_instance(power_well)->hsw.idx; 893 u32 mask = HSW_PWR_WELL_CTL_REQ(pw_idx); 894 u32 bios_req = intel_de_read(dev_priv, regs->bios); 895 896 /* Take over the request bit if set by BIOS. */ 897 if (bios_req & mask) { 898 u32 drv_req = intel_de_read(dev_priv, regs->driver); 899 900 if (!(drv_req & mask)) 901 intel_de_write(dev_priv, regs->driver, drv_req | mask); 902 intel_de_write(dev_priv, regs->bios, bios_req & ~mask); 903 } 904} 905 906static void bxt_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, 907 struct i915_power_well *power_well) 908{ 909 bxt_ddi_phy_init(dev_priv, i915_power_well_instance(power_well)->bxt.phy); 910} 911 912static void bxt_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv, 913 struct i915_power_well *power_well) 914{ 915 bxt_ddi_phy_uninit(dev_priv, i915_power_well_instance(power_well)->bxt.phy); 916} 917 918static bool bxt_dpio_cmn_power_well_enabled(struct drm_i915_private *dev_priv, 919 struct i915_power_well *power_well) 920{ 921 return bxt_ddi_phy_is_enabled(dev_priv, i915_power_well_instance(power_well)->bxt.phy); 922} 923 924static void bxt_verify_ddi_phy_power_wells(struct drm_i915_private *dev_priv) 925{ 926 struct i915_power_well *power_well; 927 928 power_well = lookup_power_well(dev_priv, BXT_DISP_PW_DPIO_CMN_A); 929 if (intel_power_well_refcount(power_well) > 0) 930 bxt_ddi_phy_verify_state(dev_priv, i915_power_well_instance(power_well)->bxt.phy); 931 932 power_well = lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC); 933 if (intel_power_well_refcount(power_well) > 0) 934 bxt_ddi_phy_verify_state(dev_priv, i915_power_well_instance(power_well)->bxt.phy); 935 936 if (IS_GEMINILAKE(dev_priv)) { 937 power_well = lookup_power_well(dev_priv, 938 GLK_DISP_PW_DPIO_CMN_C); 939 if (intel_power_well_refcount(power_well) > 0) 940 bxt_ddi_phy_verify_state(dev_priv, 941 i915_power_well_instance(power_well)->bxt.phy); 942 } 943} 944 945static bool gen9_dc_off_power_well_enabled(struct drm_i915_private *dev_priv, 946 struct i915_power_well *power_well) 947{ 948 return ((intel_de_read(dev_priv, DC_STATE_EN) & DC_STATE_EN_DC3CO) == 0 && 949 (intel_de_read(dev_priv, DC_STATE_EN) & DC_STATE_EN_UPTO_DC5_DC6_MASK) == 0); 950} 951 952static void gen9_assert_dbuf_enabled(struct drm_i915_private *dev_priv) 953{ 954 u8 hw_enabled_dbuf_slices = intel_enabled_dbuf_slices_mask(dev_priv); 955 u8 enabled_dbuf_slices = dev_priv->display.dbuf.enabled_slices; 956 957 drm_WARN(&dev_priv->drm, 958 hw_enabled_dbuf_slices != enabled_dbuf_slices, 959 "Unexpected DBuf power power state (0x%08x, expected 0x%08x)\n", 960 hw_enabled_dbuf_slices, 961 enabled_dbuf_slices); 962} 963 964void gen9_disable_dc_states(struct drm_i915_private *dev_priv) 965{ 966 struct i915_power_domains *power_domains = &dev_priv->display.power.domains; 967 struct intel_cdclk_config cdclk_config = {}; 968 969 if (power_domains->target_dc_state == DC_STATE_EN_DC3CO) { 970 tgl_disable_dc3co(dev_priv); 971 return; 972 } 973 974 gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); 975 976 if (!HAS_DISPLAY(dev_priv)) 977 return; 978 979 intel_cdclk_get_cdclk(dev_priv, &cdclk_config); 980 /* Can't read out voltage_level so can't use intel_cdclk_changed() */ 981 drm_WARN_ON(&dev_priv->drm, 982 intel_cdclk_needs_modeset(&dev_priv->display.cdclk.hw, 983 &cdclk_config)); 984 985 gen9_assert_dbuf_enabled(dev_priv); 986 987 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) 988 bxt_verify_ddi_phy_power_wells(dev_priv); 989 990 if (DISPLAY_VER(dev_priv) >= 11) 991 /* 992 * DMC retains HW context only for port A, the other combo 993 * PHY's HW context for port B is lost after DC transitions, 994 * so we need to restore it manually. 995 */ 996 intel_combo_phy_init(dev_priv); 997} 998 999static void gen9_dc_off_power_well_enable(struct drm_i915_private *dev_priv, 1000 struct i915_power_well *power_well) 1001{ 1002 gen9_disable_dc_states(dev_priv); 1003} 1004 1005static void gen9_dc_off_power_well_disable(struct drm_i915_private *dev_priv, 1006 struct i915_power_well *power_well) 1007{ 1008 struct i915_power_domains *power_domains = &dev_priv->display.power.domains; 1009 1010 if (!intel_dmc_has_payload(dev_priv)) 1011 return; 1012 1013 switch (power_domains->target_dc_state) { 1014 case DC_STATE_EN_DC3CO: 1015 tgl_enable_dc3co(dev_priv); 1016 break; 1017 case DC_STATE_EN_UPTO_DC6: 1018 skl_enable_dc6(dev_priv); 1019 break; 1020 case DC_STATE_EN_UPTO_DC5: 1021 gen9_enable_dc5(dev_priv); 1022 break; 1023 } 1024} 1025 1026static void i9xx_power_well_sync_hw_noop(struct drm_i915_private *dev_priv, 1027 struct i915_power_well *power_well) 1028{ 1029} 1030 1031static void i9xx_always_on_power_well_noop(struct drm_i915_private *dev_priv, 1032 struct i915_power_well *power_well) 1033{ 1034} 1035 1036static bool i9xx_always_on_power_well_enabled(struct drm_i915_private *dev_priv, 1037 struct i915_power_well *power_well) 1038{ 1039 return true; 1040} 1041 1042static void i830_pipes_power_well_enable(struct drm_i915_private *dev_priv, 1043 struct i915_power_well *power_well) 1044{ 1045 if ((intel_de_read(dev_priv, TRANSCONF(PIPE_A)) & TRANSCONF_ENABLE) == 0) 1046 i830_enable_pipe(dev_priv, PIPE_A); 1047 if ((intel_de_read(dev_priv, TRANSCONF(PIPE_B)) & TRANSCONF_ENABLE) == 0) 1048 i830_enable_pipe(dev_priv, PIPE_B); 1049} 1050 1051static void i830_pipes_power_well_disable(struct drm_i915_private *dev_priv, 1052 struct i915_power_well *power_well) 1053{ 1054 i830_disable_pipe(dev_priv, PIPE_B); 1055 i830_disable_pipe(dev_priv, PIPE_A); 1056} 1057 1058static bool i830_pipes_power_well_enabled(struct drm_i915_private *dev_priv, 1059 struct i915_power_well *power_well) 1060{ 1061 return intel_de_read(dev_priv, TRANSCONF(PIPE_A)) & TRANSCONF_ENABLE && 1062 intel_de_read(dev_priv, TRANSCONF(PIPE_B)) & TRANSCONF_ENABLE; 1063} 1064 1065static void i830_pipes_power_well_sync_hw(struct drm_i915_private *dev_priv, 1066 struct i915_power_well *power_well) 1067{ 1068 if (intel_power_well_refcount(power_well) > 0) 1069 i830_pipes_power_well_enable(dev_priv, power_well); 1070 else 1071 i830_pipes_power_well_disable(dev_priv, power_well); 1072} 1073 1074static void vlv_set_power_well(struct drm_i915_private *dev_priv, 1075 struct i915_power_well *power_well, bool enable) 1076{ 1077 int pw_idx = i915_power_well_instance(power_well)->vlv.idx; 1078 u32 mask; 1079 u32 state; 1080 u32 ctrl; 1081 1082 mask = PUNIT_PWRGT_MASK(pw_idx); 1083 state = enable ? PUNIT_PWRGT_PWR_ON(pw_idx) : 1084 PUNIT_PWRGT_PWR_GATE(pw_idx); 1085 1086 vlv_punit_get(dev_priv); 1087 1088#define COND \ 1089 ((vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask) == state) 1090 1091 if (COND) 1092 goto out; 1093 1094 ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL); 1095 ctrl &= ~mask; 1096 ctrl |= state; 1097 vlv_punit_write(dev_priv, PUNIT_REG_PWRGT_CTRL, ctrl); 1098 1099 if (wait_for(COND, 100)) 1100 drm_err(&dev_priv->drm, 1101 "timeout setting power well state %08x (%08x)\n", 1102 state, 1103 vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL)); 1104 1105#undef COND 1106 1107out: 1108 vlv_punit_put(dev_priv); 1109} 1110 1111static void vlv_power_well_enable(struct drm_i915_private *dev_priv, 1112 struct i915_power_well *power_well) 1113{ 1114 vlv_set_power_well(dev_priv, power_well, true); 1115} 1116 1117static void vlv_power_well_disable(struct drm_i915_private *dev_priv, 1118 struct i915_power_well *power_well) 1119{ 1120 vlv_set_power_well(dev_priv, power_well, false); 1121} 1122 1123static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv, 1124 struct i915_power_well *power_well) 1125{ 1126 int pw_idx = i915_power_well_instance(power_well)->vlv.idx; 1127 bool enabled = false; 1128 u32 mask; 1129 u32 state; 1130 u32 ctrl; 1131 1132 mask = PUNIT_PWRGT_MASK(pw_idx); 1133 ctrl = PUNIT_PWRGT_PWR_ON(pw_idx); 1134 1135 vlv_punit_get(dev_priv); 1136 1137 state = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask; 1138 /* 1139 * We only ever set the power-on and power-gate states, anything 1140 * else is unexpected. 1141 */ 1142 drm_WARN_ON(&dev_priv->drm, state != PUNIT_PWRGT_PWR_ON(pw_idx) && 1143 state != PUNIT_PWRGT_PWR_GATE(pw_idx)); 1144 if (state == ctrl) 1145 enabled = true; 1146 1147 /* 1148 * A transient state at this point would mean some unexpected party 1149 * is poking at the power controls too. 1150 */ 1151 ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL) & mask; 1152 drm_WARN_ON(&dev_priv->drm, ctrl != state); 1153 1154 vlv_punit_put(dev_priv); 1155 1156 return enabled; 1157} 1158 1159static void vlv_init_display_clock_gating(struct drm_i915_private *dev_priv) 1160{ 1161 /* 1162 * On driver load, a pipe may be active and driving a DSI display. 1163 * Preserve DPOUNIT_CLOCK_GATE_DISABLE to avoid the pipe getting stuck 1164 * (and never recovering) in this case. intel_dsi_post_disable() will 1165 * clear it when we turn off the display. 1166 */ 1167 intel_de_rmw(dev_priv, DSPCLK_GATE_D(dev_priv), 1168 ~DPOUNIT_CLOCK_GATE_DISABLE, VRHUNIT_CLOCK_GATE_DISABLE); 1169 1170 /* 1171 * Disable trickle feed and enable pnd deadline calculation 1172 */ 1173 intel_de_write(dev_priv, MI_ARB_VLV, 1174 MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE); 1175 intel_de_write(dev_priv, CBR1_VLV, 0); 1176 1177 drm_WARN_ON(&dev_priv->drm, RUNTIME_INFO(dev_priv)->rawclk_freq == 0); 1178 intel_de_write(dev_priv, RAWCLK_FREQ_VLV, 1179 DIV_ROUND_CLOSEST(RUNTIME_INFO(dev_priv)->rawclk_freq, 1180 1000)); 1181} 1182 1183static void vlv_display_power_well_init(struct drm_i915_private *dev_priv) 1184{ 1185 struct intel_encoder *encoder; 1186 enum pipe pipe; 1187 1188 /* 1189 * Enable the CRI clock source so we can get at the 1190 * display and the reference clock for VGA 1191 * hotplug / manual detection. Supposedly DSI also 1192 * needs the ref clock up and running. 1193 * 1194 * CHV DPLL B/C have some issues if VGA mode is enabled. 1195 */ 1196 for_each_pipe(dev_priv, pipe) { 1197 u32 val = intel_de_read(dev_priv, DPLL(pipe)); 1198 1199 val |= DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS; 1200 if (pipe != PIPE_A) 1201 val |= DPLL_INTEGRATED_CRI_CLK_VLV; 1202 1203 intel_de_write(dev_priv, DPLL(pipe), val); 1204 } 1205 1206 vlv_init_display_clock_gating(dev_priv); 1207 1208 spin_lock_irq(&dev_priv->irq_lock); 1209 valleyview_enable_display_irqs(dev_priv); 1210 spin_unlock_irq(&dev_priv->irq_lock); 1211 1212 /* 1213 * During driver initialization/resume we can avoid restoring the 1214 * part of the HW/SW state that will be inited anyway explicitly. 1215 */ 1216 if (dev_priv->display.power.domains.initializing) 1217 return; 1218 1219 intel_hpd_init(dev_priv); 1220 intel_hpd_poll_disable(dev_priv); 1221 1222 /* Re-enable the ADPA, if we have one */ 1223 for_each_intel_encoder(&dev_priv->drm, encoder) { 1224 if (encoder->type == INTEL_OUTPUT_ANALOG) 1225 intel_crt_reset(&encoder->base); 1226 } 1227 1228 intel_vga_redisable_power_on(dev_priv); 1229 1230 intel_pps_unlock_regs_wa(dev_priv); 1231} 1232 1233static void vlv_display_power_well_deinit(struct drm_i915_private *dev_priv) 1234{ 1235 spin_lock_irq(&dev_priv->irq_lock); 1236 valleyview_disable_display_irqs(dev_priv); 1237 spin_unlock_irq(&dev_priv->irq_lock); 1238 1239 /* make sure we're done processing display irqs */ 1240 intel_synchronize_irq(dev_priv); 1241 1242 intel_pps_reset_all(dev_priv); 1243 1244 /* Prevent us from re-enabling polling on accident in late suspend */ 1245 if (!dev_priv->drm.dev->power.is_suspended) 1246 intel_hpd_poll_enable(dev_priv); 1247} 1248 1249static void vlv_display_power_well_enable(struct drm_i915_private *dev_priv, 1250 struct i915_power_well *power_well) 1251{ 1252 vlv_set_power_well(dev_priv, power_well, true); 1253 1254 vlv_display_power_well_init(dev_priv); 1255} 1256 1257static void vlv_display_power_well_disable(struct drm_i915_private *dev_priv, 1258 struct i915_power_well *power_well) 1259{ 1260 vlv_display_power_well_deinit(dev_priv); 1261 1262 vlv_set_power_well(dev_priv, power_well, false); 1263} 1264 1265static void vlv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, 1266 struct i915_power_well *power_well) 1267{ 1268 /* since ref/cri clock was enabled */ 1269 udelay(1); /* >10ns for cmnreset, >0ns for sidereset */ 1270 1271 vlv_set_power_well(dev_priv, power_well, true); 1272 1273 /* 1274 * From VLV2A0_DP_eDP_DPIO_driver_vbios_notes_10.docx - 1275 * 6. De-assert cmn_reset/side_reset. Same as VLV X0. 1276 * a. GUnit 0x2110 bit[0] set to 1 (def 0) 1277 * b. The other bits such as sfr settings / modesel may all 1278 * be set to 0. 1279 * 1280 * This should only be done on init and resume from S3 with 1281 * both PLLs disabled, or we risk losing DPIO and PLL 1282 * synchronization. 1283 */ 1284 intel_de_rmw(dev_priv, DPIO_CTL, 0, DPIO_CMNRST); 1285} 1286 1287static void vlv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv, 1288 struct i915_power_well *power_well) 1289{ 1290 enum pipe pipe; 1291 1292 for_each_pipe(dev_priv, pipe) 1293 assert_pll_disabled(dev_priv, pipe); 1294 1295 /* Assert common reset */ 1296 intel_de_rmw(dev_priv, DPIO_CTL, DPIO_CMNRST, 0); 1297 1298 vlv_set_power_well(dev_priv, power_well, false); 1299} 1300 1301#define BITS_SET(val, bits) (((val) & (bits)) == (bits)) 1302 1303static void assert_chv_phy_status(struct drm_i915_private *dev_priv) 1304{ 1305 struct i915_power_well *cmn_bc = 1306 lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC); 1307 struct i915_power_well *cmn_d = 1308 lookup_power_well(dev_priv, CHV_DISP_PW_DPIO_CMN_D); 1309 u32 phy_control = dev_priv->display.power.chv_phy_control; 1310 u32 phy_status = 0; 1311 u32 phy_status_mask = 0xffffffff; 1312 1313 /* 1314 * The BIOS can leave the PHY is some weird state 1315 * where it doesn't fully power down some parts. 1316 * Disable the asserts until the PHY has been fully 1317 * reset (ie. the power well has been disabled at 1318 * least once). 1319 */ 1320 if (!dev_priv->display.power.chv_phy_assert[DPIO_PHY0]) 1321 phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0) | 1322 PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0) | 1323 PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1) | 1324 PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1) | 1325 PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0) | 1326 PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1)); 1327 1328 if (!dev_priv->display.power.chv_phy_assert[DPIO_PHY1]) 1329 phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0) | 1330 PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0) | 1331 PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1)); 1332 1333 if (intel_power_well_is_enabled(dev_priv, cmn_bc)) { 1334 phy_status |= PHY_POWERGOOD(DPIO_PHY0); 1335 1336 /* this assumes override is only used to enable lanes */ 1337 if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0)) == 0) 1338 phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0); 1339 1340 if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1)) == 0) 1341 phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1); 1342 1343 /* CL1 is on whenever anything is on in either channel */ 1344 if (BITS_SET(phy_control, 1345 PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0) | 1346 PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1))) 1347 phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0); 1348 1349 /* 1350 * The DPLLB check accounts for the pipe B + port A usage 1351 * with CL2 powered up but all the lanes in the second channel 1352 * powered down. 1353 */ 1354 if (BITS_SET(phy_control, 1355 PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1)) && 1356 (intel_de_read(dev_priv, DPLL(PIPE_B)) & DPLL_VCO_ENABLE) == 0) 1357 phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1); 1358 1359 if (BITS_SET(phy_control, 1360 PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH0))) 1361 phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0); 1362 if (BITS_SET(phy_control, 1363 PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH0))) 1364 phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1); 1365 1366 if (BITS_SET(phy_control, 1367 PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH1))) 1368 phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0); 1369 if (BITS_SET(phy_control, 1370 PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH1))) 1371 phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1); 1372 } 1373 1374 if (intel_power_well_is_enabled(dev_priv, cmn_d)) { 1375 phy_status |= PHY_POWERGOOD(DPIO_PHY1); 1376 1377 /* this assumes override is only used to enable lanes */ 1378 if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0)) == 0) 1379 phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0); 1380 1381 if (BITS_SET(phy_control, 1382 PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0))) 1383 phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0); 1384 1385 if (BITS_SET(phy_control, 1386 PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY1, DPIO_CH0))) 1387 phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0); 1388 if (BITS_SET(phy_control, 1389 PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY1, DPIO_CH0))) 1390 phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1); 1391 } 1392 1393 phy_status &= phy_status_mask; 1394 1395 /* 1396 * The PHY may be busy with some initial calibration and whatnot, 1397 * so the power state can take a while to actually change. 1398 */ 1399 if (intel_de_wait_for_register(dev_priv, DISPLAY_PHY_STATUS, 1400 phy_status_mask, phy_status, 10)) 1401 drm_err(&dev_priv->drm, 1402 "Unexpected PHY_STATUS 0x%08x, expected 0x%08x (PHY_CONTROL=0x%08x)\n", 1403 intel_de_read(dev_priv, DISPLAY_PHY_STATUS) & phy_status_mask, 1404 phy_status, dev_priv->display.power.chv_phy_control); 1405} 1406 1407#undef BITS_SET 1408 1409static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, 1410 struct i915_power_well *power_well) 1411{ 1412 enum i915_power_well_id id = i915_power_well_instance(power_well)->id; 1413 enum dpio_phy phy; 1414 u32 tmp; 1415 1416 drm_WARN_ON_ONCE(&dev_priv->drm, 1417 id != VLV_DISP_PW_DPIO_CMN_BC && 1418 id != CHV_DISP_PW_DPIO_CMN_D); 1419 1420 if (id == VLV_DISP_PW_DPIO_CMN_BC) 1421 phy = DPIO_PHY0; 1422 else 1423 phy = DPIO_PHY1; 1424 1425 /* since ref/cri clock was enabled */ 1426 udelay(1); /* >10ns for cmnreset, >0ns for sidereset */ 1427 vlv_set_power_well(dev_priv, power_well, true); 1428 1429 /* Poll for phypwrgood signal */ 1430 if (intel_de_wait_for_set(dev_priv, DISPLAY_PHY_STATUS, 1431 PHY_POWERGOOD(phy), 1)) 1432 drm_err(&dev_priv->drm, "Display PHY %d is not power up\n", 1433 phy); 1434 1435 vlv_dpio_get(dev_priv); 1436 1437 /* Enable dynamic power down */ 1438 tmp = vlv_dpio_read(dev_priv, phy, CHV_CMN_DW28); 1439 tmp |= DPIO_DYNPWRDOWNEN_CH0 | DPIO_CL1POWERDOWNEN | 1440 DPIO_SUS_CLK_CONFIG_GATE_CLKREQ; 1441 vlv_dpio_write(dev_priv, phy, CHV_CMN_DW28, tmp); 1442 1443 if (id == VLV_DISP_PW_DPIO_CMN_BC) { 1444 tmp = vlv_dpio_read(dev_priv, phy, _CHV_CMN_DW6_CH1); 1445 tmp |= DPIO_DYNPWRDOWNEN_CH1; 1446 vlv_dpio_write(dev_priv, phy, _CHV_CMN_DW6_CH1, tmp); 1447 } else { 1448 /* 1449 * Force the non-existing CL2 off. BXT does this 1450 * too, so maybe it saves some power even though 1451 * CL2 doesn't exist? 1452 */ 1453 tmp = vlv_dpio_read(dev_priv, phy, CHV_CMN_DW30); 1454 tmp |= DPIO_CL2_LDOFUSE_PWRENB; 1455 vlv_dpio_write(dev_priv, phy, CHV_CMN_DW30, tmp); 1456 } 1457 1458 vlv_dpio_put(dev_priv); 1459 1460 dev_priv->display.power.chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(phy); 1461 intel_de_write(dev_priv, DISPLAY_PHY_CONTROL, 1462 dev_priv->display.power.chv_phy_control); 1463 1464 drm_dbg_kms(&dev_priv->drm, 1465 "Enabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n", 1466 phy, dev_priv->display.power.chv_phy_control); 1467 1468 assert_chv_phy_status(dev_priv); 1469} 1470 1471static void chv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv, 1472 struct i915_power_well *power_well) 1473{ 1474 enum i915_power_well_id id = i915_power_well_instance(power_well)->id; 1475 enum dpio_phy phy; 1476 1477 drm_WARN_ON_ONCE(&dev_priv->drm, 1478 id != VLV_DISP_PW_DPIO_CMN_BC && 1479 id != CHV_DISP_PW_DPIO_CMN_D); 1480 1481 if (id == VLV_DISP_PW_DPIO_CMN_BC) { 1482 phy = DPIO_PHY0; 1483 assert_pll_disabled(dev_priv, PIPE_A); 1484 assert_pll_disabled(dev_priv, PIPE_B); 1485 } else { 1486 phy = DPIO_PHY1; 1487 assert_pll_disabled(dev_priv, PIPE_C); 1488 } 1489 1490 dev_priv->display.power.chv_phy_control &= ~PHY_COM_LANE_RESET_DEASSERT(phy); 1491 intel_de_write(dev_priv, DISPLAY_PHY_CONTROL, 1492 dev_priv->display.power.chv_phy_control); 1493 1494 vlv_set_power_well(dev_priv, power_well, false); 1495 1496 drm_dbg_kms(&dev_priv->drm, 1497 "Disabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n", 1498 phy, dev_priv->display.power.chv_phy_control); 1499 1500 /* PHY is fully reset now, so we can enable the PHY state asserts */ 1501 dev_priv->display.power.chv_phy_assert[phy] = true; 1502 1503 assert_chv_phy_status(dev_priv); 1504} 1505 1506static void assert_chv_phy_powergate(struct drm_i915_private *dev_priv, enum dpio_phy phy, 1507 enum dpio_channel ch, bool override, unsigned int mask) 1508{ 1509 u32 reg, val, expected, actual; 1510 1511 /* 1512 * The BIOS can leave the PHY is some weird state 1513 * where it doesn't fully power down some parts. 1514 * Disable the asserts until the PHY has been fully 1515 * reset (ie. the power well has been disabled at 1516 * least once). 1517 */ 1518 if (!dev_priv->display.power.chv_phy_assert[phy]) 1519 return; 1520 1521 if (ch == DPIO_CH0) 1522 reg = _CHV_CMN_DW0_CH0; 1523 else 1524 reg = _CHV_CMN_DW6_CH1; 1525 1526 vlv_dpio_get(dev_priv); 1527 val = vlv_dpio_read(dev_priv, phy, reg); 1528 vlv_dpio_put(dev_priv); 1529 1530 /* 1531 * This assumes !override is only used when the port is disabled. 1532 * All lanes should power down even without the override when 1533 * the port is disabled. 1534 */ 1535 if (!override || mask == 0xf) { 1536 expected = DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN; 1537 /* 1538 * If CH1 common lane is not active anymore 1539 * (eg. for pipe B DPLL) the entire channel will 1540 * shut down, which causes the common lane registers 1541 * to read as 0. That means we can't actually check 1542 * the lane power down status bits, but as the entire 1543 * register reads as 0 it's a good indication that the 1544 * channel is indeed entirely powered down. 1545 */ 1546 if (ch == DPIO_CH1 && val == 0) 1547 expected = 0; 1548 } else if (mask != 0x0) { 1549 expected = DPIO_ANYDL_POWERDOWN; 1550 } else { 1551 expected = 0; 1552 } 1553 1554 if (ch == DPIO_CH0) 1555 actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH0; 1556 else 1557 actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH1; 1558 actual &= DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN; 1559 1560 drm_WARN(&dev_priv->drm, actual != expected, 1561 "Unexpected DPIO lane power down: all %d, any %d. Expected: all %d, any %d. (0x%x = 0x%08x)\n", 1562 !!(actual & DPIO_ALLDL_POWERDOWN), 1563 !!(actual & DPIO_ANYDL_POWERDOWN), 1564 !!(expected & DPIO_ALLDL_POWERDOWN), 1565 !!(expected & DPIO_ANYDL_POWERDOWN), 1566 reg, val); 1567} 1568 1569bool chv_phy_powergate_ch(struct drm_i915_private *dev_priv, enum dpio_phy phy, 1570 enum dpio_channel ch, bool override) 1571{ 1572 struct i915_power_domains *power_domains = &dev_priv->display.power.domains; 1573 bool was_override; 1574 1575 mutex_lock(&power_domains->lock); 1576 1577 was_override = dev_priv->display.power.chv_phy_control & PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); 1578 1579 if (override == was_override) 1580 goto out; 1581 1582 if (override) 1583 dev_priv->display.power.chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); 1584 else 1585 dev_priv->display.power.chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); 1586 1587 intel_de_write(dev_priv, DISPLAY_PHY_CONTROL, 1588 dev_priv->display.power.chv_phy_control); 1589 1590 drm_dbg_kms(&dev_priv->drm, 1591 "Power gating DPIO PHY%d CH%d (DPIO_PHY_CONTROL=0x%08x)\n", 1592 phy, ch, dev_priv->display.power.chv_phy_control); 1593 1594 assert_chv_phy_status(dev_priv); 1595 1596out: 1597 mutex_unlock(&power_domains->lock); 1598 1599 return was_override; 1600} 1601 1602void chv_phy_powergate_lanes(struct intel_encoder *encoder, 1603 bool override, unsigned int mask) 1604{ 1605 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); 1606 struct i915_power_domains *power_domains = &dev_priv->display.power.domains; 1607 enum dpio_phy phy = vlv_dig_port_to_phy(enc_to_dig_port(encoder)); 1608 enum dpio_channel ch = vlv_dig_port_to_channel(enc_to_dig_port(encoder)); 1609 1610 mutex_lock(&power_domains->lock); 1611 1612 dev_priv->display.power.chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD(0xf, phy, ch); 1613 dev_priv->display.power.chv_phy_control |= PHY_CH_POWER_DOWN_OVRD(mask, phy, ch); 1614 1615 if (override) 1616 dev_priv->display.power.chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); 1617 else 1618 dev_priv->display.power.chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch); 1619 1620 intel_de_write(dev_priv, DISPLAY_PHY_CONTROL, 1621 dev_priv->display.power.chv_phy_control); 1622 1623 drm_dbg_kms(&dev_priv->drm, 1624 "Power gating DPIO PHY%d CH%d lanes 0x%x (PHY_CONTROL=0x%08x)\n", 1625 phy, ch, mask, dev_priv->display.power.chv_phy_control); 1626 1627 assert_chv_phy_status(dev_priv); 1628 1629 assert_chv_phy_powergate(dev_priv, phy, ch, override, mask); 1630 1631 mutex_unlock(&power_domains->lock); 1632} 1633 1634static bool chv_pipe_power_well_enabled(struct drm_i915_private *dev_priv, 1635 struct i915_power_well *power_well) 1636{ 1637 enum pipe pipe = PIPE_A; 1638 bool enabled; 1639 u32 state, ctrl; 1640 1641 vlv_punit_get(dev_priv); 1642 1643 state = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM) & DP_SSS_MASK(pipe); 1644 /* 1645 * We only ever set the power-on and power-gate states, anything 1646 * else is unexpected. 1647 */ 1648 drm_WARN_ON(&dev_priv->drm, state != DP_SSS_PWR_ON(pipe) && 1649 state != DP_SSS_PWR_GATE(pipe)); 1650 enabled = state == DP_SSS_PWR_ON(pipe); 1651 1652 /* 1653 * A transient state at this point would mean some unexpected party 1654 * is poking at the power controls too. 1655 */ 1656 ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM) & DP_SSC_MASK(pipe); 1657 drm_WARN_ON(&dev_priv->drm, ctrl << 16 != state); 1658 1659 vlv_punit_put(dev_priv); 1660 1661 return enabled; 1662} 1663 1664static void chv_set_pipe_power_well(struct drm_i915_private *dev_priv, 1665 struct i915_power_well *power_well, 1666 bool enable) 1667{ 1668 enum pipe pipe = PIPE_A; 1669 u32 state; 1670 u32 ctrl; 1671 1672 state = enable ? DP_SSS_PWR_ON(pipe) : DP_SSS_PWR_GATE(pipe); 1673 1674 vlv_punit_get(dev_priv); 1675 1676#define COND \ 1677 ((vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM) & DP_SSS_MASK(pipe)) == state) 1678 1679 if (COND) 1680 goto out; 1681 1682 ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM); 1683 ctrl &= ~DP_SSC_MASK(pipe); 1684 ctrl |= enable ? DP_SSC_PWR_ON(pipe) : DP_SSC_PWR_GATE(pipe); 1685 vlv_punit_write(dev_priv, PUNIT_REG_DSPSSPM, ctrl); 1686 1687 if (wait_for(COND, 100)) 1688 drm_err(&dev_priv->drm, 1689 "timeout setting power well state %08x (%08x)\n", 1690 state, 1691 vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM)); 1692 1693#undef COND 1694 1695out: 1696 vlv_punit_put(dev_priv); 1697} 1698 1699static void chv_pipe_power_well_sync_hw(struct drm_i915_private *dev_priv, 1700 struct i915_power_well *power_well) 1701{ 1702 intel_de_write(dev_priv, DISPLAY_PHY_CONTROL, 1703 dev_priv->display.power.chv_phy_control); 1704} 1705 1706static void chv_pipe_power_well_enable(struct drm_i915_private *dev_priv, 1707 struct i915_power_well *power_well) 1708{ 1709 chv_set_pipe_power_well(dev_priv, power_well, true); 1710 1711 vlv_display_power_well_init(dev_priv); 1712} 1713 1714static void chv_pipe_power_well_disable(struct drm_i915_private *dev_priv, 1715 struct i915_power_well *power_well) 1716{ 1717 vlv_display_power_well_deinit(dev_priv); 1718 1719 chv_set_pipe_power_well(dev_priv, power_well, false); 1720} 1721 1722static void 1723tgl_tc_cold_request(struct drm_i915_private *i915, bool block) 1724{ 1725 u8 tries = 0; 1726 int ret; 1727 1728 while (1) { 1729 u32 low_val; 1730 u32 high_val = 0; 1731 1732 if (block) 1733 low_val = TGL_PCODE_EXIT_TCCOLD_DATA_L_BLOCK_REQ; 1734 else 1735 low_val = TGL_PCODE_EXIT_TCCOLD_DATA_L_UNBLOCK_REQ; 1736 1737 /* 1738 * Spec states that we should timeout the request after 200us 1739 * but the function below will timeout after 500us 1740 */ 1741 ret = snb_pcode_read(&i915->uncore, TGL_PCODE_TCCOLD, &low_val, &high_val); 1742 if (ret == 0) { 1743 if (block && 1744 (low_val & TGL_PCODE_EXIT_TCCOLD_DATA_L_EXIT_FAILED)) 1745 ret = -EIO; 1746 else 1747 break; 1748 } 1749 1750 if (++tries == 3) 1751 break; 1752 1753 msleep(1); 1754 } 1755 1756 if (ret) 1757 drm_err(&i915->drm, "TC cold %sblock failed\n", 1758 block ? "" : "un"); 1759 else 1760 drm_dbg_kms(&i915->drm, "TC cold %sblock succeeded\n", 1761 block ? "" : "un"); 1762} 1763 1764static void 1765tgl_tc_cold_off_power_well_enable(struct drm_i915_private *i915, 1766 struct i915_power_well *power_well) 1767{ 1768 tgl_tc_cold_request(i915, true); 1769} 1770 1771static void 1772tgl_tc_cold_off_power_well_disable(struct drm_i915_private *i915, 1773 struct i915_power_well *power_well) 1774{ 1775 tgl_tc_cold_request(i915, false); 1776} 1777 1778static void 1779tgl_tc_cold_off_power_well_sync_hw(struct drm_i915_private *i915, 1780 struct i915_power_well *power_well) 1781{ 1782 if (intel_power_well_refcount(power_well) > 0) 1783 tgl_tc_cold_off_power_well_enable(i915, power_well); 1784 else 1785 tgl_tc_cold_off_power_well_disable(i915, power_well); 1786} 1787 1788static bool 1789tgl_tc_cold_off_power_well_is_enabled(struct drm_i915_private *dev_priv, 1790 struct i915_power_well *power_well) 1791{ 1792 /* 1793 * Not the correctly implementation but there is no way to just read it 1794 * from PCODE, so returning count to avoid state mismatch errors 1795 */ 1796 return intel_power_well_refcount(power_well); 1797} 1798 1799static void xelpdp_aux_power_well_enable(struct drm_i915_private *dev_priv, 1800 struct i915_power_well *power_well) 1801{ 1802 enum aux_ch aux_ch = i915_power_well_instance(power_well)->xelpdp.aux_ch; 1803 enum phy phy = icl_aux_pw_to_phy(dev_priv, power_well); 1804 1805 if (intel_phy_is_tc(dev_priv, phy)) 1806 icl_tc_port_assert_ref_held(dev_priv, power_well, 1807 aux_ch_to_digital_port(dev_priv, aux_ch)); 1808 1809 intel_de_rmw(dev_priv, XELPDP_DP_AUX_CH_CTL(dev_priv, aux_ch), 1810 XELPDP_DP_AUX_CH_CTL_POWER_REQUEST, 1811 XELPDP_DP_AUX_CH_CTL_POWER_REQUEST); 1812 1813 /* 1814 * The power status flag cannot be used to determine whether aux 1815 * power wells have finished powering up. Instead we're 1816 * expected to just wait a fixed 600us after raising the request 1817 * bit. 1818 */ 1819 usleep_range(600, 1200); 1820} 1821 1822static void xelpdp_aux_power_well_disable(struct drm_i915_private *dev_priv, 1823 struct i915_power_well *power_well) 1824{ 1825 enum aux_ch aux_ch = i915_power_well_instance(power_well)->xelpdp.aux_ch; 1826 1827 intel_de_rmw(dev_priv, XELPDP_DP_AUX_CH_CTL(dev_priv, aux_ch), 1828 XELPDP_DP_AUX_CH_CTL_POWER_REQUEST, 1829 0); 1830 usleep_range(10, 30); 1831} 1832 1833static bool xelpdp_aux_power_well_enabled(struct drm_i915_private *dev_priv, 1834 struct i915_power_well *power_well) 1835{ 1836 enum aux_ch aux_ch = i915_power_well_instance(power_well)->xelpdp.aux_ch; 1837 1838 return intel_de_read(dev_priv, XELPDP_DP_AUX_CH_CTL(dev_priv, aux_ch)) & 1839 XELPDP_DP_AUX_CH_CTL_POWER_STATUS; 1840} 1841 1842static void xe2lpd_pica_power_well_enable(struct drm_i915_private *dev_priv, 1843 struct i915_power_well *power_well) 1844{ 1845 intel_de_write(dev_priv, XE2LPD_PICA_PW_CTL, 1846 XE2LPD_PICA_CTL_POWER_REQUEST); 1847 1848 if (intel_de_wait_for_set(dev_priv, XE2LPD_PICA_PW_CTL, 1849 XE2LPD_PICA_CTL_POWER_STATUS, 1)) { 1850 drm_dbg_kms(&dev_priv->drm, "pica power well enable timeout\n"); 1851 1852 drm_WARN(&dev_priv->drm, 1, "Power well PICA timeout when enabled"); 1853 } 1854} 1855 1856static void xe2lpd_pica_power_well_disable(struct drm_i915_private *dev_priv, 1857 struct i915_power_well *power_well) 1858{ 1859 intel_de_write(dev_priv, XE2LPD_PICA_PW_CTL, 0); 1860 1861 if (intel_de_wait_for_clear(dev_priv, XE2LPD_PICA_PW_CTL, 1862 XE2LPD_PICA_CTL_POWER_STATUS, 1)) { 1863 drm_dbg_kms(&dev_priv->drm, "pica power well disable timeout\n"); 1864 1865 drm_WARN(&dev_priv->drm, 1, "Power well PICA timeout when disabled"); 1866 } 1867} 1868 1869static bool xe2lpd_pica_power_well_enabled(struct drm_i915_private *dev_priv, 1870 struct i915_power_well *power_well) 1871{ 1872 return intel_de_read(dev_priv, XE2LPD_PICA_PW_CTL) & 1873 XE2LPD_PICA_CTL_POWER_STATUS; 1874} 1875 1876const struct i915_power_well_ops i9xx_always_on_power_well_ops = { 1877 .sync_hw = i9xx_power_well_sync_hw_noop, 1878 .enable = i9xx_always_on_power_well_noop, 1879 .disable = i9xx_always_on_power_well_noop, 1880 .is_enabled = i9xx_always_on_power_well_enabled, 1881}; 1882 1883const struct i915_power_well_ops chv_pipe_power_well_ops = { 1884 .sync_hw = chv_pipe_power_well_sync_hw, 1885 .enable = chv_pipe_power_well_enable, 1886 .disable = chv_pipe_power_well_disable, 1887 .is_enabled = chv_pipe_power_well_enabled, 1888}; 1889 1890const struct i915_power_well_ops chv_dpio_cmn_power_well_ops = { 1891 .sync_hw = i9xx_power_well_sync_hw_noop, 1892 .enable = chv_dpio_cmn_power_well_enable, 1893 .disable = chv_dpio_cmn_power_well_disable, 1894 .is_enabled = vlv_power_well_enabled, 1895}; 1896 1897const struct i915_power_well_ops i830_pipes_power_well_ops = { 1898 .sync_hw = i830_pipes_power_well_sync_hw, 1899 .enable = i830_pipes_power_well_enable, 1900 .disable = i830_pipes_power_well_disable, 1901 .is_enabled = i830_pipes_power_well_enabled, 1902}; 1903 1904static const struct i915_power_well_regs hsw_power_well_regs = { 1905 .bios = HSW_PWR_WELL_CTL1, 1906 .driver = HSW_PWR_WELL_CTL2, 1907 .kvmr = HSW_PWR_WELL_CTL3, 1908 .debug = HSW_PWR_WELL_CTL4, 1909}; 1910 1911const struct i915_power_well_ops hsw_power_well_ops = { 1912 .regs = &hsw_power_well_regs, 1913 .sync_hw = hsw_power_well_sync_hw, 1914 .enable = hsw_power_well_enable, 1915 .disable = hsw_power_well_disable, 1916 .is_enabled = hsw_power_well_enabled, 1917}; 1918 1919const struct i915_power_well_ops gen9_dc_off_power_well_ops = { 1920 .sync_hw = i9xx_power_well_sync_hw_noop, 1921 .enable = gen9_dc_off_power_well_enable, 1922 .disable = gen9_dc_off_power_well_disable, 1923 .is_enabled = gen9_dc_off_power_well_enabled, 1924}; 1925 1926const struct i915_power_well_ops bxt_dpio_cmn_power_well_ops = { 1927 .sync_hw = i9xx_power_well_sync_hw_noop, 1928 .enable = bxt_dpio_cmn_power_well_enable, 1929 .disable = bxt_dpio_cmn_power_well_disable, 1930 .is_enabled = bxt_dpio_cmn_power_well_enabled, 1931}; 1932 1933const struct i915_power_well_ops vlv_display_power_well_ops = { 1934 .sync_hw = i9xx_power_well_sync_hw_noop, 1935 .enable = vlv_display_power_well_enable, 1936 .disable = vlv_display_power_well_disable, 1937 .is_enabled = vlv_power_well_enabled, 1938}; 1939 1940const struct i915_power_well_ops vlv_dpio_cmn_power_well_ops = { 1941 .sync_hw = i9xx_power_well_sync_hw_noop, 1942 .enable = vlv_dpio_cmn_power_well_enable, 1943 .disable = vlv_dpio_cmn_power_well_disable, 1944 .is_enabled = vlv_power_well_enabled, 1945}; 1946 1947const struct i915_power_well_ops vlv_dpio_power_well_ops = { 1948 .sync_hw = i9xx_power_well_sync_hw_noop, 1949 .enable = vlv_power_well_enable, 1950 .disable = vlv_power_well_disable, 1951 .is_enabled = vlv_power_well_enabled, 1952}; 1953 1954static const struct i915_power_well_regs icl_aux_power_well_regs = { 1955 .bios = ICL_PWR_WELL_CTL_AUX1, 1956 .driver = ICL_PWR_WELL_CTL_AUX2, 1957 .debug = ICL_PWR_WELL_CTL_AUX4, 1958}; 1959 1960const struct i915_power_well_ops icl_aux_power_well_ops = { 1961 .regs = &icl_aux_power_well_regs, 1962 .sync_hw = hsw_power_well_sync_hw, 1963 .enable = icl_aux_power_well_enable, 1964 .disable = icl_aux_power_well_disable, 1965 .is_enabled = hsw_power_well_enabled, 1966}; 1967 1968static const struct i915_power_well_regs icl_ddi_power_well_regs = { 1969 .bios = ICL_PWR_WELL_CTL_DDI1, 1970 .driver = ICL_PWR_WELL_CTL_DDI2, 1971 .debug = ICL_PWR_WELL_CTL_DDI4, 1972}; 1973 1974const struct i915_power_well_ops icl_ddi_power_well_ops = { 1975 .regs = &icl_ddi_power_well_regs, 1976 .sync_hw = hsw_power_well_sync_hw, 1977 .enable = hsw_power_well_enable, 1978 .disable = hsw_power_well_disable, 1979 .is_enabled = hsw_power_well_enabled, 1980}; 1981 1982const struct i915_power_well_ops tgl_tc_cold_off_ops = { 1983 .sync_hw = tgl_tc_cold_off_power_well_sync_hw, 1984 .enable = tgl_tc_cold_off_power_well_enable, 1985 .disable = tgl_tc_cold_off_power_well_disable, 1986 .is_enabled = tgl_tc_cold_off_power_well_is_enabled, 1987}; 1988 1989const struct i915_power_well_ops xelpdp_aux_power_well_ops = { 1990 .sync_hw = i9xx_power_well_sync_hw_noop, 1991 .enable = xelpdp_aux_power_well_enable, 1992 .disable = xelpdp_aux_power_well_disable, 1993 .is_enabled = xelpdp_aux_power_well_enabled, 1994}; 1995 1996const struct i915_power_well_ops xe2lpd_pica_power_well_ops = { 1997 .sync_hw = i9xx_power_well_sync_hw_noop, 1998 .enable = xe2lpd_pica_power_well_enable, 1999 .disable = xe2lpd_pica_power_well_disable, 2000 .is_enabled = xe2lpd_pica_power_well_enabled, 2001}; 2002