drivers/gpu/drm/radeon/radeon_pm.c

   1 /*
   2  * Permission is hereby granted, free of charge, to any person obtaining a
   3  * copy of this software and associated documentation files (the "Software"),
   4  * to deal in the Software without restriction, including without limitation
   5  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   6  * and/or sell copies of the Software, and to permit persons to whom the
   7  * Software is furnished to do so, subject to the following conditions:
   8  *
   9  * The above copyright notice and this permission notice shall be included in
  10  * all copies or substantial portions of the Software.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  13  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  14  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  15  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  16  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  17  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  18  * OTHER DEALINGS IN THE SOFTWARE.
  19  *
  20  * Authors: Rafał Miłecki <zajec5@gmail.com>
  21  *          Alex Deucher <alexdeucher@gmail.com>
  22  */
  23 #include "drmP.h"
  24 #include "radeon.h"
  25 #include "avivod.h"
  26 #ifdef CONFIG_ACPI
  27 #include <linux/acpi.h>
  28 #endif
  29 #include <linux/power_supply.h>
  30
  31 #define RADEON_IDLE_LOOP_MS 100
  32 #define RADEON_RECLOCK_DELAY_MS 200
  33 #define RADEON_WAIT_VBLANK_TIMEOUT 200
  34 #define RADEON_WAIT_IDLE_TIMEOUT 200
  35
  36 static const char *radeon_pm_state_type_name[5] = {
  37         "Default",
  38         "Powersave",
  39         "Battery",
  40         "Balanced",
  41         "Performance",
  42 };
  43
  44 static void radeon_dynpm_idle_work_handler(struct work_struct *work);
  45 static int radeon_debugfs_pm_init(struct radeon_device *rdev);
  46 static bool radeon_pm_in_vbl(struct radeon_device *rdev);
  47 static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish);
  48 static void radeon_pm_update_profile(struct radeon_device *rdev);
  49 static void radeon_pm_set_clocks(struct radeon_device *rdev);
  50
  51 #define ACPI_AC_CLASS           "ac_adapter"
  52
  53 #ifdef CONFIG_ACPI
  54 static int radeon_acpi_event(struct notifier_block *nb,
  55                              unsigned long val,
  56                              void *data)
  57 {
  58         struct radeon_device *rdev = container_of(nb, struct radeon_device, acpi_nb);
  59         struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
  60
  61         if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
  62                 if (power_supply_is_system_supplied() > 0)
  63                         DRM_DEBUG("pm: AC\n");
  64                 else
  65                         DRM_DEBUG("pm: DC\n");
  66
  67                 if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
  68                         if (rdev->pm.profile == PM_PROFILE_AUTO) {
  69                                 mutex_lock(&rdev->pm.mutex);
  70                                 radeon_pm_update_profile(rdev);
  71                                 radeon_pm_set_clocks(rdev);
  72                                 mutex_unlock(&rdev->pm.mutex);
  73                         }
  74                 }
  75         }
  76
  77         return NOTIFY_OK;
  78 }
  79 #endif
  80
  81 static void radeon_pm_update_profile(struct radeon_device *rdev)
  82 {
  83         switch (rdev->pm.profile) {
  84         case PM_PROFILE_DEFAULT:
  85                 rdev->pm.profile_index = PM_PROFILE_DEFAULT_IDX;
  86                 break;
  87         case PM_PROFILE_AUTO:
  88                 if (power_supply_is_system_supplied() > 0) {
  89                         if (rdev->pm.active_crtc_count > 1)
  90                                 rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;
  91                         else
  92                                 rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;
  93                 } else {
  94                         if (rdev->pm.active_crtc_count > 1)
  95                                 rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
  96                         else
  97                                 rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
  98                 }
  99                 break;
 100         case PM_PROFILE_LOW:
 101                 if (rdev->pm.active_crtc_count > 1)
 102                         rdev->pm.profile_index = PM_PROFILE_LOW_MH_IDX;
 103                 else
 104                         rdev->pm.profile_index = PM_PROFILE_LOW_SH_IDX;
 105                 break;
 106         case PM_PROFILE_MID:
 107                 if (rdev->pm.active_crtc_count > 1)
 108                         rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
 109                 else
 110                         rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
 111                 break;
 112         case PM_PROFILE_HIGH:
 113                 if (rdev->pm.active_crtc_count > 1)
 114                         rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;
 115                 else
 116                         rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;
 117                 break;
 118         }
 119
 120         if (rdev->pm.active_crtc_count == 0) {
 121                 rdev->pm.requested_power_state_index =
 122                         rdev->pm.profiles[rdev->pm.profile_index].dpms_off_ps_idx;
 123                 rdev->pm.requested_clock_mode_index =
 124                         rdev->pm.profiles[rdev->pm.profile_index].dpms_off_cm_idx;
 125         } else {
 126                 rdev->pm.requested_power_state_index =
 127                         rdev->pm.profiles[rdev->pm.profile_index].dpms_on_ps_idx;
 128                 rdev->pm.requested_clock_mode_index =
 129                         rdev->pm.profiles[rdev->pm.profile_index].dpms_on_cm_idx;
 130         }
 131 }
 132
 133 static void radeon_unmap_vram_bos(struct radeon_device *rdev)
 134 {
 135         struct radeon_bo *bo, *n;
 136
 137         if (list_empty(&rdev->gem.objects))
 138                 return;
 139
 140         list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
 141                 if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 142                         ttm_bo_unmap_virtual(&bo->tbo);
 143         }
 144 }
 145
 146 static void radeon_sync_with_vblank(struct radeon_device *rdev)
 147 {
 148         if (rdev->pm.active_crtcs) {
 149                 rdev->pm.vblank_sync = false;
 150                 wait_event_timeout(
 151                         rdev->irq.vblank_queue, rdev->pm.vblank_sync,
 152                         msecs_to_jiffies(RADEON_WAIT_VBLANK_TIMEOUT));
 153         }
 154 }
 155
 156 static void radeon_set_power_state(struct radeon_device *rdev)
 157 {
 158         u32 sclk, mclk;
 159         bool misc_after = false;
 160
 161         if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) &&
 162             (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index))
 163                 return;
 164
 165         if (radeon_gui_idle(rdev)) {
 166                 sclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
 167                         clock_info[rdev->pm.requested_clock_mode_index].sclk;
 168                 if (sclk > rdev->clock.default_sclk)
 169                         sclk = rdev->clock.default_sclk;
 170
 171                 mclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
 172                         clock_info[rdev->pm.requested_clock_mode_index].mclk;
 173                 if (mclk > rdev->clock.default_mclk)
 174                         mclk = rdev->clock.default_mclk;
 175
 176                 /* upvolt before raising clocks, downvolt after lowering clocks */
 177                 if (sclk < rdev->pm.current_sclk)
 178                         misc_after = true;
 179
 180                 radeon_sync_with_vblank(rdev);
 181
 182                 if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 183                         if (!radeon_pm_in_vbl(rdev))
 184                                 return;
 185                 }
 186
 187                 radeon_pm_prepare(rdev);
 188
 189                 if (!misc_after)
 190                         /* voltage, pcie lanes, etc.*/
 191                         radeon_pm_misc(rdev);
 192
 193                 /* set engine clock */
 194                 if (sclk != rdev->pm.current_sclk) {
 195                         radeon_pm_debug_check_in_vbl(rdev, false);
 196                         radeon_set_engine_clock(rdev, sclk);
 197                         radeon_pm_debug_check_in_vbl(rdev, true);
 198                         rdev->pm.current_sclk = sclk;
 199                         DRM_DEBUG("Setting: e: %d\n", sclk);
 200                 }
 201
 202                 /* set memory clock */
 203                 if (rdev->asic->set_memory_clock && (mclk != rdev->pm.current_mclk)) {
 204                         radeon_pm_debug_check_in_vbl(rdev, false);
 205                         radeon_set_memory_clock(rdev, mclk);
 206                         radeon_pm_debug_check_in_vbl(rdev, true);
 207                         rdev->pm.current_mclk = mclk;
 208                         DRM_DEBUG("Setting: m: %d\n", mclk);
 209                 }
 210
 211                 if (misc_after)
 212                         /* voltage, pcie lanes, etc.*/
 213                         radeon_pm_misc(rdev);
 214
 215                 radeon_pm_finish(rdev);
 216
 217                 rdev->pm.current_power_state_index = rdev->pm.requested_power_state_index;
 218                 rdev->pm.current_clock_mode_index = rdev->pm.requested_clock_mode_index;
 219         } else
 220                 DRM_DEBUG("pm: GUI not idle!!!\n");
 221 }
 222
 223 static void radeon_pm_set_clocks(struct radeon_device *rdev)
 224 {
 225         int i;
 226
 227         mutex_lock(&rdev->ddev->struct_mutex);
 228         mutex_lock(&rdev->vram_mutex);
 229         mutex_lock(&rdev->cp.mutex);
 230
 231         /* gui idle int has issues on older chips it seems */
 232         if (rdev->family >= CHIP_R600) {
 233                 if (rdev->irq.installed) {
 234                         /* wait for GPU idle */
 235                         rdev->pm.gui_idle = false;
 236                         rdev->irq.gui_idle = true;
 237                         radeon_irq_set(rdev);
 238                         wait_event_interruptible_timeout(
 239                                 rdev->irq.idle_queue, rdev->pm.gui_idle,
 240                                 msecs_to_jiffies(RADEON_WAIT_IDLE_TIMEOUT));
 241                         rdev->irq.gui_idle = false;
 242                         radeon_irq_set(rdev);
 243                 }
 244         } else {
 245                 if (rdev->cp.ready) {
 246                         struct radeon_fence *fence;
 247                         radeon_ring_alloc(rdev, 64);
 248                         radeon_fence_create(rdev, &fence);
 249                         radeon_fence_emit(rdev, fence);
 250                         radeon_ring_commit(rdev);
 251                         radeon_fence_wait(fence, false);
 252                         radeon_fence_unref(&fence);
 253                 }
 254         }
 255         radeon_unmap_vram_bos(rdev);
 256
 257         if (rdev->irq.installed) {
 258                 for (i = 0; i < rdev->num_crtc; i++) {
 259                         if (rdev->pm.active_crtcs & (1 << i)) {
 260                                 rdev->pm.req_vblank |= (1 << i);
 261                                 drm_vblank_get(rdev->ddev, i);
 262                         }
 263                 }
 264         }
 265
 266         radeon_set_power_state(rdev);
 267
 268         if (rdev->irq.installed) {
 269                 for (i = 0; i < rdev->num_crtc; i++) {
 270                         if (rdev->pm.req_vblank & (1 << i)) {
 271                                 rdev->pm.req_vblank &= ~(1 << i);
 272                                 drm_vblank_put(rdev->ddev, i);
 273                         }
 274                 }
 275         }
 276
 277         /* update display watermarks based on new power state */
 278         radeon_update_bandwidth_info(rdev);
 279         if (rdev->pm.active_crtc_count)
 280                 radeon_bandwidth_update(rdev);
 281
 282         rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 283
 284         mutex_unlock(&rdev->cp.mutex);
 285         mutex_unlock(&rdev->vram_mutex);
 286         mutex_unlock(&rdev->ddev->struct_mutex);
 287 }
 288
 289 static void radeon_pm_print_states(struct radeon_device *rdev)
 290 {
 291         int i, j;
 292         struct radeon_power_state *power_state;
 293         struct radeon_pm_clock_info *clock_info;
 294
 295         DRM_DEBUG("%d Power State(s)\n", rdev->pm.num_power_states);
 296         for (i = 0; i < rdev->pm.num_power_states; i++) {
 297                 power_state = &rdev->pm.power_state[i];
 298                 DRM_DEBUG("State %d: %s\n", i,
 299                         radeon_pm_state_type_name[power_state->type]);
 300                 if (i == rdev->pm.default_power_state_index)
 301                         DRM_DEBUG("\tDefault");
 302                 if ((rdev->flags & RADEON_IS_PCIE) && !(rdev->flags & RADEON_IS_IGP))
 303                         DRM_DEBUG("\t%d PCIE Lanes\n", power_state->pcie_lanes);
 304                 if (power_state->flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY)
 305                         DRM_DEBUG("\tSingle display only\n");
 306                 DRM_DEBUG("\t%d Clock Mode(s)\n", power_state->num_clock_modes);
 307                 for (j = 0; j < power_state->num_clock_modes; j++) {
 308                         clock_info = &(power_state->clock_info[j]);
 309                         if (rdev->flags & RADEON_IS_IGP)
 310                                 DRM_DEBUG("\t\t%d e: %d%s\n",
 311                                         j,
 312                                         clock_info->sclk * 10,
 313                                         clock_info->flags & RADEON_PM_MODE_NO_DISPLAY ? "\tNo display only" : "");
 314                         else
 315                                 DRM_DEBUG("\t\t%d e: %d\tm: %d\tv: %d%s\n",
 316                                         j,
 317                                         clock_info->sclk * 10,
 318                                         clock_info->mclk * 10,
 319                                         clock_info->voltage.voltage,
 320                                         clock_info->flags & RADEON_PM_MODE_NO_DISPLAY ? "\tNo display only" : "");
 321                 }
 322         }
 323 }
 324
 325 static ssize_t radeon_get_pm_profile(struct device *dev,
 326                                      struct device_attribute *attr,
 327                                      char *buf)
 328 {
 329         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 330         struct radeon_device *rdev = ddev->dev_private;
 331         int cp = rdev->pm.profile;
 332
 333         return snprintf(buf, PAGE_SIZE, "%s\n",
 334                         (cp == PM_PROFILE_AUTO) ? "auto" :
 335                         (cp == PM_PROFILE_LOW) ? "low" :
 336                         (cp == PM_PROFILE_HIGH) ? "high" : "default");
 337 }
 338
 339 static ssize_t radeon_set_pm_profile(struct device *dev,
 340                                      struct device_attribute *attr,
 341                                      const char *buf,
 342                                      size_t count)
 343 {
 344         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 345         struct radeon_device *rdev = ddev->dev_private;
 346
 347         mutex_lock(&rdev->pm.mutex);
 348         if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
 349                 if (strncmp("default", buf, strlen("default")) == 0)
 350                         rdev->pm.profile = PM_PROFILE_DEFAULT;
 351                 else if (strncmp("auto", buf, strlen("auto")) == 0)
 352                         rdev->pm.profile = PM_PROFILE_AUTO;
 353                 else if (strncmp("low", buf, strlen("low")) == 0)
 354                         rdev->pm.profile = PM_PROFILE_LOW;
 355                 else if (strncmp("mid", buf, strlen("mid")) == 0)
 356                         rdev->pm.profile = PM_PROFILE_MID;
 357                 else if (strncmp("high", buf, strlen("high")) == 0)
 358                         rdev->pm.profile = PM_PROFILE_HIGH;
 359                 else {
 360                         DRM_ERROR("invalid power profile!\n");
 361                         goto fail;
 362                 }
 363                 radeon_pm_update_profile(rdev);
 364                 radeon_pm_set_clocks(rdev);
 365         }
 366 fail:
 367         mutex_unlock(&rdev->pm.mutex);
 368
 369         return count;
 370 }
 371
 372 static ssize_t radeon_get_pm_method(struct device *dev,
 373                                     struct device_attribute *attr,
 374                                     char *buf)
 375 {
 376         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 377         struct radeon_device *rdev = ddev->dev_private;
 378         int pm = rdev->pm.pm_method;
 379
 380         return snprintf(buf, PAGE_SIZE, "%s\n",
 381                         (pm == PM_METHOD_DYNPM) ? "dynpm" : "profile");
 382 }
 383
 384 static ssize_t radeon_set_pm_method(struct device *dev,
 385                                     struct device_attribute *attr,
 386                                     const char *buf,
 387                                     size_t count)
 388 {
 389         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 390         struct radeon_device *rdev = ddev->dev_private;
 391
 392
 393         if (strncmp("dynpm", buf, strlen("dynpm")) == 0) {
 394                 mutex_lock(&rdev->pm.mutex);
 395                 rdev->pm.pm_method = PM_METHOD_DYNPM;
 396                 rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;
 397                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
 398                 mutex_unlock(&rdev->pm.mutex);
 399         } else if (strncmp("profile", buf, strlen("profile")) == 0) {
 400                 bool flush_wq = false;
 401
 402                 mutex_lock(&rdev->pm.mutex);
 403                 if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 404                         cancel_delayed_work(&rdev->pm.dynpm_idle_work);
 405                         flush_wq = true;
 406                 }
 407                 /* disable dynpm */
 408                 rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
 409                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 410                 rdev->pm.pm_method = PM_METHOD_PROFILE;
 411                 mutex_unlock(&rdev->pm.mutex);
 412                 if (flush_wq)
 413                         flush_workqueue(rdev->wq);
 414         } else {
 415                 DRM_ERROR("invalid power method!\n");
 416                 goto fail;
 417         }
 418         radeon_pm_compute_clocks(rdev);
 419 fail:
 420         return count;
 421 }
 422
 423 static DEVICE_ATTR(power_profile, S_IRUGO | S_IWUSR, radeon_get_pm_profile, radeon_set_pm_profile);
 424 static DEVICE_ATTR(power_method, S_IRUGO | S_IWUSR, radeon_get_pm_method, radeon_set_pm_method);
 425
 426 void radeon_pm_suspend(struct radeon_device *rdev)
 427 {
 428         bool flush_wq = false;
 429
 430         mutex_lock(&rdev->pm.mutex);
 431         if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 432                 cancel_delayed_work(&rdev->pm.dynpm_idle_work);
 433                 if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE)
 434                         rdev->pm.dynpm_state = DYNPM_STATE_SUSPENDED;
 435                 flush_wq = true;
 436         }
 437         mutex_unlock(&rdev->pm.mutex);
 438         if (flush_wq)
 439                 flush_workqueue(rdev->wq);
 440 }
 441
 442 void radeon_pm_resume(struct radeon_device *rdev)
 443 {
 444         /* asic init will reset the default power state */
 445         mutex_lock(&rdev->pm.mutex);
 446         rdev->pm.current_power_state_index = rdev->pm.default_power_state_index;
 447         rdev->pm.current_clock_mode_index = 0;
 448         rdev->pm.current_sclk = rdev->clock.default_sclk;
 449         rdev->pm.current_mclk = rdev->clock.default_mclk;
 450         rdev->pm.current_vddc = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage;
 451         if (rdev->pm.pm_method == PM_METHOD_DYNPM
 452             && rdev->pm.dynpm_state == DYNPM_STATE_SUSPENDED) {
 453                 rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
 454                 queue_delayed_work(rdev->wq, &rdev->pm.dynpm_idle_work,
 455                                         msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 456         }
 457         mutex_unlock(&rdev->pm.mutex);
 458         radeon_pm_compute_clocks(rdev);
 459 }
 460
 461 int radeon_pm_init(struct radeon_device *rdev)
 462 {
 463         int ret;
 464         /* default to profile method */
 465         rdev->pm.pm_method = PM_METHOD_PROFILE;
 466         rdev->pm.profile = PM_PROFILE_DEFAULT;
 467         rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
 468         rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 469         rdev->pm.dynpm_can_upclock = true;
 470         rdev->pm.dynpm_can_downclock = true;
 471         rdev->pm.current_sclk = rdev->clock.default_sclk;
 472         rdev->pm.current_mclk = rdev->clock.default_mclk;
 473
 474         if (rdev->bios) {
 475                 if (rdev->is_atom_bios)
 476                         radeon_atombios_get_power_modes(rdev);
 477                 else
 478                         radeon_combios_get_power_modes(rdev);
 479                 radeon_pm_print_states(rdev);
 480                 radeon_pm_init_profile(rdev);
 481         }
 482
 483         if (rdev->pm.num_power_states > 1) {
 484                 /* where's the best place to put these? */
 485                 ret = device_create_file(rdev->dev, &dev_attr_power_profile);
 486                 if (ret)
 487                         DRM_ERROR("failed to create device file for power profile\n");
 488                 ret = device_create_file(rdev->dev, &dev_attr_power_method);
 489                 if (ret)
 490                         DRM_ERROR("failed to create device file for power method\n");
 491
 492 #ifdef CONFIG_ACPI
 493                 rdev->acpi_nb.notifier_call = radeon_acpi_event;
 494                 register_acpi_notifier(&rdev->acpi_nb);
 495 #endif
 496                 INIT_DELAYED_WORK(&rdev->pm.dynpm_idle_work, radeon_dynpm_idle_work_handler);
 497
 498                 if (radeon_debugfs_pm_init(rdev)) {
 499                         DRM_ERROR("Failed to register debugfs file for PM!\n");
 500                 }
 501
 502                 DRM_INFO("radeon: power management initialized\n");
 503         }
 504
 505         return 0;
 506 }
 507
 508 void radeon_pm_fini(struct radeon_device *rdev)
 509 {
 510         if (rdev->pm.num_power_states > 1) {
 511                 bool flush_wq = false;
 512
 513                 mutex_lock(&rdev->pm.mutex);
 514                 if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
 515                         rdev->pm.profile = PM_PROFILE_DEFAULT;
 516                         radeon_pm_update_profile(rdev);
 517                         radeon_pm_set_clocks(rdev);
 518                 } else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 519                         /* cancel work */
 520                         cancel_delayed_work(&rdev->pm.dynpm_idle_work);
 521                         flush_wq = true;
 522                         /* reset default clocks */
 523                         rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
 524                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
 525                         radeon_pm_set_clocks(rdev);
 526                 }
 527                 mutex_unlock(&rdev->pm.mutex);
 528                 if (flush_wq)
 529                         flush_workqueue(rdev->wq);
 530
 531                 device_remove_file(rdev->dev, &dev_attr_power_profile);
 532                 device_remove_file(rdev->dev, &dev_attr_power_method);
 533 #ifdef CONFIG_ACPI
 534                 unregister_acpi_notifier(&rdev->acpi_nb);
 535 #endif
 536         }
 537
 538         if (rdev->pm.i2c_bus)
 539                 radeon_i2c_destroy(rdev->pm.i2c_bus);
 540 }
 541
 542 void radeon_pm_compute_clocks(struct radeon_device *rdev)
 543 {
 544         struct drm_device *ddev = rdev->ddev;
 545         struct drm_crtc *crtc;
 546         struct radeon_crtc *radeon_crtc;
 547
 548         if (rdev->pm.num_power_states < 2)
 549                 return;
 550
 551         mutex_lock(&rdev->pm.mutex);
 552
 553         rdev->pm.active_crtcs = 0;
 554         rdev->pm.active_crtc_count = 0;
 555         list_for_each_entry(crtc,
 556                 &ddev->mode_config.crtc_list, head) {
 557                 radeon_crtc = to_radeon_crtc(crtc);
 558                 if (radeon_crtc->enabled) {
 559                         rdev->pm.active_crtcs |= (1 << radeon_crtc->crtc_id);
 560                         rdev->pm.active_crtc_count++;
 561                 }
 562         }
 563
 564         if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
 565                 radeon_pm_update_profile(rdev);
 566                 radeon_pm_set_clocks(rdev);
 567         } else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 568                 if (rdev->pm.dynpm_state != DYNPM_STATE_DISABLED) {
 569                         if (rdev->pm.active_crtc_count > 1) {
 570                                 if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) {
 571                                         cancel_delayed_work(&rdev->pm.dynpm_idle_work);
 572
 573                                         rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;
 574                                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
 575                                         radeon_pm_get_dynpm_state(rdev);
 576                                         radeon_pm_set_clocks(rdev);
 577
 578                                         DRM_DEBUG("radeon: dynamic power management deactivated\n");
 579                                 }
 580                         } else if (rdev->pm.active_crtc_count == 1) {
 581                                 /* TODO: Increase clocks if needed for current mode */
 582
 583                                 if (rdev->pm.dynpm_state == DYNPM_STATE_MINIMUM) {
 584                                         rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
 585                                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_UPCLOCK;
 586                                         radeon_pm_get_dynpm_state(rdev);
 587                                         radeon_pm_set_clocks(rdev);
 588
 589                                         queue_delayed_work(rdev->wq, &rdev->pm.dynpm_idle_work,
 590                                                            msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 591                                 } else if (rdev->pm.dynpm_state == DYNPM_STATE_PAUSED) {
 592                                         rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
 593                                         queue_delayed_work(rdev->wq, &rdev->pm.dynpm_idle_work,
 594                                                            msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 595                                         DRM_DEBUG("radeon: dynamic power management activated\n");
 596                                 }
 597                         } else { /* count == 0 */
 598                                 if (rdev->pm.dynpm_state != DYNPM_STATE_MINIMUM) {
 599                                         cancel_delayed_work(&rdev->pm.dynpm_idle_work);
 600
 601                                         rdev->pm.dynpm_state = DYNPM_STATE_MINIMUM;
 602                                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_MINIMUM;
 603                                         radeon_pm_get_dynpm_state(rdev);
 604                                         radeon_pm_set_clocks(rdev);
 605                                 }
 606                         }
 607                 }
 608         }
 609
 610         mutex_unlock(&rdev->pm.mutex);
 611 }
 612
 613 static bool radeon_pm_in_vbl(struct radeon_device *rdev)
 614 {
 615         u32 stat_crtc = 0, vbl = 0, position = 0;
 616         bool in_vbl = true;
 617
 618         if (ASIC_IS_DCE4(rdev)) {
 619                 if (rdev->pm.active_crtcs & (1 << 0)) {
 620                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 621                                      EVERGREEN_CRTC0_REGISTER_OFFSET) & 0xfff;
 622                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 623                                           EVERGREEN_CRTC0_REGISTER_OFFSET) & 0xfff;
 624                 }
 625                 if (rdev->pm.active_crtcs & (1 << 1)) {
 626                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 627                                      EVERGREEN_CRTC1_REGISTER_OFFSET) & 0xfff;
 628                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 629                                           EVERGREEN_CRTC1_REGISTER_OFFSET) & 0xfff;
 630                 }
 631                 if (rdev->pm.active_crtcs & (1 << 2)) {
 632                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 633                                      EVERGREEN_CRTC2_REGISTER_OFFSET) & 0xfff;
 634                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 635                                           EVERGREEN_CRTC2_REGISTER_OFFSET) & 0xfff;
 636                 }
 637                 if (rdev->pm.active_crtcs & (1 << 3)) {
 638                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 639                                      EVERGREEN_CRTC3_REGISTER_OFFSET) & 0xfff;
 640                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 641                                           EVERGREEN_CRTC3_REGISTER_OFFSET) & 0xfff;
 642                 }
 643                 if (rdev->pm.active_crtcs & (1 << 4)) {
 644                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 645                                      EVERGREEN_CRTC4_REGISTER_OFFSET) & 0xfff;
 646                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 647                                           EVERGREEN_CRTC4_REGISTER_OFFSET) & 0xfff;
 648                 }
 649                 if (rdev->pm.active_crtcs & (1 << 5)) {
 650                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 651                                      EVERGREEN_CRTC5_REGISTER_OFFSET) & 0xfff;
 652                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 653                                           EVERGREEN_CRTC5_REGISTER_OFFSET) & 0xfff;
 654                 }
 655         } else if (ASIC_IS_AVIVO(rdev)) {
 656                 if (rdev->pm.active_crtcs & (1 << 0)) {
 657                         vbl = RREG32(AVIVO_D1CRTC_V_BLANK_START_END) & 0xfff;
 658                         position = RREG32(AVIVO_D1CRTC_STATUS_POSITION) & 0xfff;
 659                 }
 660                 if (rdev->pm.active_crtcs & (1 << 1)) {
 661                         vbl = RREG32(AVIVO_D2CRTC_V_BLANK_START_END) & 0xfff;
 662                         position = RREG32(AVIVO_D2CRTC_STATUS_POSITION) & 0xfff;
 663                 }
 664                 if (position < vbl && position > 1)
 665                         in_vbl = false;
 666         } else {
 667                 if (rdev->pm.active_crtcs & (1 << 0)) {
 668                         stat_crtc = RREG32(RADEON_CRTC_STATUS);
 669                         if (!(stat_crtc & 1))
 670                                 in_vbl = false;
 671                 }
 672                 if (rdev->pm.active_crtcs & (1 << 1)) {
 673                         stat_crtc = RREG32(RADEON_CRTC2_STATUS);
 674                         if (!(stat_crtc & 1))
 675                                 in_vbl = false;
 676                 }
 677         }
 678
 679         if (position < vbl && position > 1)
 680                 in_vbl = false;
 681
 682         return in_vbl;
 683 }
 684
 685 static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish)
 686 {
 687         u32 stat_crtc = 0;
 688         bool in_vbl = radeon_pm_in_vbl(rdev);
 689
 690         if (in_vbl == false)
 691                 DRM_DEBUG("not in vbl for pm change %08x at %s\n", stat_crtc,
 692                          finish ? "exit" : "entry");
 693         return in_vbl;
 694 }
 695
 696 static void radeon_dynpm_idle_work_handler(struct work_struct *work)
 697 {
 698         struct radeon_device *rdev;
 699         int resched;
 700         rdev = container_of(work, struct radeon_device,
 701                                 pm.dynpm_idle_work.work);
 702
 703         resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev);
 704         mutex_lock(&rdev->pm.mutex);
 705         if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) {
 706                 unsigned long irq_flags;
 707                 int not_processed = 0;
 708
 709                 read_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
 710                 if (!list_empty(&rdev->fence_drv.emited)) {
 711                         struct list_head *ptr;
 712                         list_for_each(ptr, &rdev->fence_drv.emited) {
 713                                 /* count up to 3, that's enought info */
 714                                 if (++not_processed >= 3)
 715                                         break;
 716                         }
 717                 }
 718                 read_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
 719
 720                 if (not_processed >= 3) { /* should upclock */
 721                         if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_DOWNCLOCK) {
 722                                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 723                         } else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE &&
 724                                    rdev->pm.dynpm_can_upclock) {
 725                                 rdev->pm.dynpm_planned_action =
 726                                         DYNPM_ACTION_UPCLOCK;
 727                                 rdev->pm.dynpm_action_timeout = jiffies +
 728                                 msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
 729                         }
 730                 } else if (not_processed == 0) { /* should downclock */
 731                         if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_UPCLOCK) {
 732                                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 733                         } else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE &&
 734                                    rdev->pm.dynpm_can_downclock) {
 735                                 rdev->pm.dynpm_planned_action =
 736                                         DYNPM_ACTION_DOWNCLOCK;
 737                                 rdev->pm.dynpm_action_timeout = jiffies +
 738                                 msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
 739                         }
 740                 }
 741
 742                 /* Note, radeon_pm_set_clocks is called with static_switch set
 743                  * to false since we want to wait for vbl to avoid flicker.
 744                  */
 745                 if (rdev->pm.dynpm_planned_action != DYNPM_ACTION_NONE &&
 746                     jiffies > rdev->pm.dynpm_action_timeout) {
 747                         radeon_pm_get_dynpm_state(rdev);
 748                         radeon_pm_set_clocks(rdev);
 749                 }
 750
 751                 queue_delayed_work(rdev->wq, &rdev->pm.dynpm_idle_work,
 752                                         msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 753         }
 754         mutex_unlock(&rdev->pm.mutex);
 755         ttm_bo_unlock_delayed_workqueue(&rdev->mman.bdev, resched);
 756 }
 757
 758 /*
 759  * Debugfs info
 760  */
 761 #if defined(CONFIG_DEBUG_FS)
 762
 763 static int radeon_debugfs_pm_info(struct seq_file *m, void *data)
 764 {
 765         struct drm_info_node *node = (struct drm_info_node *) m->private;
 766         struct drm_device *dev = node->minor->dev;
 767         struct radeon_device *rdev = dev->dev_private;
 768
 769         seq_printf(m, "default engine clock: %u0 kHz\n", rdev->clock.default_sclk);
 770         seq_printf(m, "current engine clock: %u0 kHz\n", radeon_get_engine_clock(rdev));
 771         seq_printf(m, "default memory clock: %u0 kHz\n", rdev->clock.default_mclk);
 772         if (rdev->asic->get_memory_clock)
 773                 seq_printf(m, "current memory clock: %u0 kHz\n", radeon_get_memory_clock(rdev));
 774         if (rdev->pm.current_vddc)
 775                 seq_printf(m, "voltage: %u mV\n", rdev->pm.current_vddc);
 776         if (rdev->asic->get_pcie_lanes)
 777                 seq_printf(m, "PCIE lanes: %d\n", radeon_get_pcie_lanes(rdev));
 778
 779         return 0;
 780 }
 781
 782 static struct drm_info_list radeon_pm_info_list[] = {
 783         {"radeon_pm_info", radeon_debugfs_pm_info, 0, NULL},
 784 };
 785 #endif
 786
 787 static int radeon_debugfs_pm_init(struct radeon_device *rdev)
 788 {
 789 #if defined(CONFIG_DEBUG_FS)
 790         return radeon_debugfs_add_files(rdev, radeon_pm_info_list, ARRAY_SIZE(radeon_pm_info_list));
 791 #else
 792         return 0;
 793 #endif
 794 }