SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 void radeon_dynpm_idle_work_handler(struct work_struct *work);
  37 static int radeon_debugfs_pm_init(struct radeon_device *rdev);
  38 static bool radeon_pm_in_vbl(struct radeon_device *rdev);
  39 static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish);
  40 static void radeon_pm_update_profile(struct radeon_device *rdev);
  41 static void radeon_pm_set_clocks(struct radeon_device *rdev);
  42
  43 #define ACPI_AC_CLASS           "ac_adapter"
  44
  45 #ifdef CONFIG_ACPI
  46 static int radeon_acpi_event(struct notifier_block *nb,
  47                              unsigned long val,
  48                              void *data)
  49 {
  50         struct radeon_device *rdev = container_of(nb, struct radeon_device, acpi_nb);
  51         struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
  52
  53         if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
  54                 if (power_supply_is_system_supplied() > 0)
  55                         DRM_DEBUG("pm: AC\n");
  56                 else
  57                         DRM_DEBUG("pm: DC\n");
  58
  59                 if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
  60                         if (rdev->pm.profile == PM_PROFILE_AUTO) {
  61                                 mutex_lock(&rdev->pm.mutex);
  62                                 radeon_pm_update_profile(rdev);
  63                                 radeon_pm_set_clocks(rdev);
  64                                 mutex_unlock(&rdev->pm.mutex);
  65                         }
  66                 }
  67         }
  68
  69         return NOTIFY_OK;
  70 }
  71 #endif
  72
  73 static void radeon_pm_update_profile(struct radeon_device *rdev)
  74 {
  75         switch (rdev->pm.profile) {
  76         case PM_PROFILE_DEFAULT:
  77                 rdev->pm.profile_index = PM_PROFILE_DEFAULT_IDX;
  78                 break;
  79         case PM_PROFILE_AUTO:
  80                 if (power_supply_is_system_supplied() > 0) {
  81                         if (rdev->pm.active_crtc_count > 1)
  82                                 rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;
  83                         else
  84                                 rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;
  85                 } else {
  86                         if (rdev->pm.active_crtc_count > 1)
  87                                 rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
  88                         else
  89                                 rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
  90                 }
  91                 break;
  92         case PM_PROFILE_LOW:
  93                 if (rdev->pm.active_crtc_count > 1)
  94                         rdev->pm.profile_index = PM_PROFILE_LOW_MH_IDX;
  95                 else
  96                         rdev->pm.profile_index = PM_PROFILE_LOW_SH_IDX;
  97                 break;
  98         case PM_PROFILE_MID:
  99                 if (rdev->pm.active_crtc_count > 1)
 100                         rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
 101                 else
 102                         rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
 103                 break;
 104         case PM_PROFILE_HIGH:
 105                 if (rdev->pm.active_crtc_count > 1)
 106                         rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;
 107                 else
 108                         rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;
 109                 break;
 110         }
 111
 112         if (rdev->pm.active_crtc_count == 0) {
 113                 rdev->pm.requested_power_state_index =
 114                         rdev->pm.profiles[rdev->pm.profile_index].dpms_off_ps_idx;
 115                 rdev->pm.requested_clock_mode_index =
 116                         rdev->pm.profiles[rdev->pm.profile_index].dpms_off_cm_idx;
 117         } else {
 118                 rdev->pm.requested_power_state_index =
 119                         rdev->pm.profiles[rdev->pm.profile_index].dpms_on_ps_idx;
 120                 rdev->pm.requested_clock_mode_index =
 121                         rdev->pm.profiles[rdev->pm.profile_index].dpms_on_cm_idx;
 122         }
 123 }
 124
 125 static void radeon_unmap_vram_bos(struct radeon_device *rdev)
 126 {
 127         struct radeon_bo *bo, *n;
 128
 129         if (list_empty(&rdev->gem.objects))
 130                 return;
 131
 132         list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
 133                 if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 134                         ttm_bo_unmap_virtual(&bo->tbo);
 135         }
 136 }
 137
 138 static void radeon_sync_with_vblank(struct radeon_device *rdev)
 139 {
 140         if (rdev->pm.active_crtcs) {
 141                 rdev->pm.vblank_sync = false;
 142                 wait_event_timeout(
 143                         rdev->irq.vblank_queue, rdev->pm.vblank_sync,
 144                         msecs_to_jiffies(RADEON_WAIT_VBLANK_TIMEOUT));
 145         }
 146 }
 147
 148 static void radeon_set_power_state(struct radeon_device *rdev)
 149 {
 150         u32 sclk, mclk;
 151         bool misc_after = false;
 152
 153         if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) &&
 154             (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index))
 155                 return;
 156
 157         if (radeon_gui_idle(rdev)) {
 158                 sclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
 159                         clock_info[rdev->pm.requested_clock_mode_index].sclk;
 160                 if (sclk > rdev->clock.default_sclk)
 161                         sclk = rdev->clock.default_sclk;
 162
 163                 mclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
 164                         clock_info[rdev->pm.requested_clock_mode_index].mclk;
 165                 if (mclk > rdev->clock.default_mclk)
 166                         mclk = rdev->clock.default_mclk;
 167
 168                 /* upvolt before raising clocks, downvolt after lowering clocks */
 169                 if (sclk < rdev->pm.current_sclk)
 170                         misc_after = true;
 171
 172                 radeon_sync_with_vblank(rdev);
 173
 174                 if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 175                         if (!radeon_pm_in_vbl(rdev))
 176                                 return;
 177                 }
 178
 179                 radeon_pm_prepare(rdev);
 180
 181                 if (!misc_after)
 182                         /* voltage, pcie lanes, etc.*/
 183                         radeon_pm_misc(rdev);
 184
 185                 /* set engine clock */
 186                 if (sclk != rdev->pm.current_sclk) {
 187                         radeon_pm_debug_check_in_vbl(rdev, false);
 188                         radeon_set_engine_clock(rdev, sclk);
 189                         radeon_pm_debug_check_in_vbl(rdev, true);
 190                         rdev->pm.current_sclk = sclk;
 191                         DRM_DEBUG("Setting: e: %d\n", sclk);
 192                 }
 193
 194                 /* set memory clock */
 195                 if (rdev->asic->set_memory_clock && (mclk != rdev->pm.current_mclk)) {
 196                         radeon_pm_debug_check_in_vbl(rdev, false);
 197                         radeon_set_memory_clock(rdev, mclk);
 198                         radeon_pm_debug_check_in_vbl(rdev, true);
 199                         rdev->pm.current_mclk = mclk;
 200                         DRM_DEBUG("Setting: m: %d\n", mclk);
 201                 }
 202
 203                 if (misc_after)
 204                         /* voltage, pcie lanes, etc.*/
 205                         radeon_pm_misc(rdev);
 206
 207                 radeon_pm_finish(rdev);
 208
 209                 rdev->pm.current_power_state_index = rdev->pm.requested_power_state_index;
 210                 rdev->pm.current_clock_mode_index = rdev->pm.requested_clock_mode_index;
 211         } else
 212                 DRM_DEBUG("pm: GUI not idle!!!\n");
 213 }
 214
 215 static void radeon_pm_set_clocks(struct radeon_device *rdev)
 216 {
 217         int i;
 218
 219         mutex_lock(&rdev->ddev->struct_mutex);
 220         mutex_lock(&rdev->vram_mutex);
 221         mutex_lock(&rdev->cp.mutex);
 222
 223         /* gui idle int has issues on older chips it seems */
 224         if (rdev->family >= CHIP_R600) {
 225                 if (rdev->irq.installed) {
 226                         /* wait for GPU idle */
 227                         rdev->pm.gui_idle = false;
 228                         rdev->irq.gui_idle = true;
 229                         radeon_irq_set(rdev);
 230                         wait_event_interruptible_timeout(
 231                                 rdev->irq.idle_queue, rdev->pm.gui_idle,
 232                                 msecs_to_jiffies(RADEON_WAIT_IDLE_TIMEOUT));
 233                         rdev->irq.gui_idle = false;
 234                         radeon_irq_set(rdev);
 235                 }
 236         } else {
 237                 if (rdev->cp.ready) {
 238                         struct radeon_fence *fence;
 239                         radeon_ring_alloc(rdev, 64);
 240                         radeon_fence_create(rdev, &fence);
 241                         radeon_fence_emit(rdev, fence);
 242                         radeon_ring_commit(rdev);
 243                         radeon_fence_wait(fence, false);
 244                         radeon_fence_unref(&fence);
 245                 }
 246         }
 247         radeon_unmap_vram_bos(rdev);
 248
 249         if (rdev->irq.installed) {
 250                 for (i = 0; i < rdev->num_crtc; i++) {
 251                         if (rdev->pm.active_crtcs & (1 << i)) {
 252                                 rdev->pm.req_vblank |= (1 << i);
 253                                 drm_vblank_get(rdev->ddev, i);
 254                         }
 255                 }
 256         }
 257
 258         radeon_set_power_state(rdev);
 259
 260         if (rdev->irq.installed) {
 261                 for (i = 0; i < rdev->num_crtc; i++) {
 262                         if (rdev->pm.req_vblank & (1 << i)) {
 263                                 rdev->pm.req_vblank &= ~(1 << i);
 264                                 drm_vblank_put(rdev->ddev, i);
 265                         }
 266                 }
 267         }
 268
 269         /* update display watermarks based on new power state */
 270         radeon_update_bandwidth_info(rdev);
 271         if (rdev->pm.active_crtc_count)
 272                 radeon_bandwidth_update(rdev);
 273
 274         rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 275
 276         mutex_unlock(&rdev->cp.mutex);
 277         mutex_unlock(&rdev->vram_mutex);
 278         mutex_unlock(&rdev->ddev->struct_mutex);
 279 }
 280
 281 static ssize_t radeon_get_pm_profile(struct device *dev,
 282                                      struct device_attribute *attr,
 283                                      char *buf)
 284 {
 285         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 286         struct radeon_device *rdev = ddev->dev_private;
 287         int cp = rdev->pm.profile;
 288
 289         return snprintf(buf, PAGE_SIZE, "%s\n",
 290                         (cp == PM_PROFILE_AUTO) ? "auto" :
 291                         (cp == PM_PROFILE_LOW) ? "low" :
 292                         (cp == PM_PROFILE_HIGH) ? "high" : "default");
 293 }
 294
 295 static ssize_t radeon_set_pm_profile(struct device *dev,
 296                                      struct device_attribute *attr,
 297                                      const char *buf,
 298                                      size_t count)
 299 {
 300         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 301         struct radeon_device *rdev = ddev->dev_private;
 302
 303         mutex_lock(&rdev->pm.mutex);
 304         if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
 305                 if (strncmp("default", buf, strlen("default")) == 0)
 306                         rdev->pm.profile = PM_PROFILE_DEFAULT;
 307                 else if (strncmp("auto", buf, strlen("auto")) == 0)
 308                         rdev->pm.profile = PM_PROFILE_AUTO;
 309                 else if (strncmp("low", buf, strlen("low")) == 0)
 310                         rdev->pm.profile = PM_PROFILE_LOW;
 311                 else if (strncmp("mid", buf, strlen("mid")) == 0)
 312                         rdev->pm.profile = PM_PROFILE_MID;
 313                 else if (strncmp("high", buf, strlen("high")) == 0)
 314                         rdev->pm.profile = PM_PROFILE_HIGH;
 315                 else {
 316                         DRM_ERROR("invalid power profile!\n");
 317                         goto fail;
 318                 }
 319                 radeon_pm_update_profile(rdev);
 320                 radeon_pm_set_clocks(rdev);
 321         }
 322 fail:
 323         mutex_unlock(&rdev->pm.mutex);
 324
 325         return count;
 326 }
 327
 328 static ssize_t radeon_get_pm_method(struct device *dev,
 329                                     struct device_attribute *attr,
 330                                     char *buf)
 331 {
 332         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 333         struct radeon_device *rdev = ddev->dev_private;
 334         int pm = rdev->pm.pm_method;
 335
 336         return snprintf(buf, PAGE_SIZE, "%s\n",
 337                         (pm == PM_METHOD_DYNPM) ? "dynpm" : "profile");
 338 }
 339
 340 static ssize_t radeon_set_pm_method(struct device *dev,
 341                                     struct device_attribute *attr,
 342                                     const char *buf,
 343                                     size_t count)
 344 {
 345         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 346         struct radeon_device *rdev = ddev->dev_private;
 347
 348
 349         if (strncmp("dynpm", buf, strlen("dynpm")) == 0) {
 350                 mutex_lock(&rdev->pm.mutex);
 351                 rdev->pm.pm_method = PM_METHOD_DYNPM;
 352                 rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;
 353                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
 354                 mutex_unlock(&rdev->pm.mutex);
 355         } else if (strncmp("profile", buf, strlen("profile")) == 0) {
 356                 mutex_lock(&rdev->pm.mutex);
 357                 rdev->pm.pm_method = PM_METHOD_PROFILE;
 358                 /* disable dynpm */
 359                 rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
 360                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 361                 cancel_delayed_work(&rdev->pm.dynpm_idle_work);
 362                 mutex_unlock(&rdev->pm.mutex);
 363         } else {
 364                 DRM_ERROR("invalid power method!\n");
 365                 goto fail;
 366         }
 367         radeon_pm_compute_clocks(rdev);
 368 fail:
 369         return count;
 370 }
 371
 372 static DEVICE_ATTR(power_profile, S_IRUGO | S_IWUSR, radeon_get_pm_profile, radeon_set_pm_profile);
 373 static DEVICE_ATTR(power_method, S_IRUGO | S_IWUSR, radeon_get_pm_method, radeon_set_pm_method);
 374
 375 void radeon_pm_suspend(struct radeon_device *rdev)
 376 {
 377         mutex_lock(&rdev->pm.mutex);
 378         cancel_delayed_work(&rdev->pm.dynpm_idle_work);
 379         mutex_unlock(&rdev->pm.mutex);
 380 }
 381
 382 void radeon_pm_resume(struct radeon_device *rdev)
 383 {
 384         /* asic init will reset the default power state */
 385         mutex_lock(&rdev->pm.mutex);
 386         rdev->pm.current_power_state_index = rdev->pm.default_power_state_index;
 387         rdev->pm.current_clock_mode_index = 0;
 388         rdev->pm.current_sclk = rdev->clock.default_sclk;
 389         rdev->pm.current_mclk = rdev->clock.default_mclk;
 390         mutex_unlock(&rdev->pm.mutex);
 391         radeon_pm_compute_clocks(rdev);
 392 }
 393
 394 int radeon_pm_init(struct radeon_device *rdev)
 395 {
 396         int ret;
 397         /* default to profile method */
 398         rdev->pm.pm_method = PM_METHOD_PROFILE;
 399         rdev->pm.profile = PM_PROFILE_DEFAULT;
 400         rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
 401         rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 402         rdev->pm.dynpm_can_upclock = true;
 403         rdev->pm.dynpm_can_downclock = true;
 404         rdev->pm.current_sclk = rdev->clock.default_sclk;
 405         rdev->pm.current_mclk = rdev->clock.default_mclk;
 406
 407         if (rdev->bios) {
 408                 if (rdev->is_atom_bios)
 409                         radeon_atombios_get_power_modes(rdev);
 410                 else
 411                         radeon_combios_get_power_modes(rdev);
 412                 radeon_pm_init_profile(rdev);
 413         }
 414
 415         if (rdev->pm.num_power_states > 1) {
 416                 /* where's the best place to put these? */
 417                 ret = device_create_file(rdev->dev, &dev_attr_power_profile);
 418                 if (ret)
 419                         DRM_ERROR("failed to create device file for power profile\n");
 420                 ret = device_create_file(rdev->dev, &dev_attr_power_method);
 421                 if (ret)
 422                         DRM_ERROR("failed to create device file for power method\n");
 423
 424 #ifdef CONFIG_ACPI
 425                 rdev->acpi_nb.notifier_call = radeon_acpi_event;
 426                 register_acpi_notifier(&rdev->acpi_nb);
 427 #endif
 428                 INIT_DELAYED_WORK(&rdev->pm.dynpm_idle_work, radeon_dynpm_idle_work_handler);
 429
 430                 if (radeon_debugfs_pm_init(rdev)) {
 431                         DRM_ERROR("Failed to register debugfs file for PM!\n");
 432                 }
 433
 434                 DRM_INFO("radeon: power management initialized\n");
 435         }
 436
 437         return 0;
 438 }
 439
 440 void radeon_pm_fini(struct radeon_device *rdev)
 441 {
 442         if (rdev->pm.num_power_states > 1) {
 443                 mutex_lock(&rdev->pm.mutex);
 444                 if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
 445                         rdev->pm.profile = PM_PROFILE_DEFAULT;
 446                         radeon_pm_update_profile(rdev);
 447                         radeon_pm_set_clocks(rdev);
 448                 } else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 449                         /* cancel work */
 450                         cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
 451                         /* reset default clocks */
 452                         rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
 453                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
 454                         radeon_pm_set_clocks(rdev);
 455                 }
 456                 mutex_unlock(&rdev->pm.mutex);
 457
 458                 device_remove_file(rdev->dev, &dev_attr_power_profile);
 459                 device_remove_file(rdev->dev, &dev_attr_power_method);
 460 #ifdef CONFIG_ACPI
 461                 unregister_acpi_notifier(&rdev->acpi_nb);
 462 #endif
 463         }
 464
 465         if (rdev->pm.i2c_bus)
 466                 radeon_i2c_destroy(rdev->pm.i2c_bus);
 467 }
 468
 469 void radeon_pm_compute_clocks(struct radeon_device *rdev)
 470 {
 471         struct drm_device *ddev = rdev->ddev;
 472         struct drm_crtc *crtc;
 473         struct radeon_crtc *radeon_crtc;
 474
 475         if (rdev->pm.num_power_states < 2)
 476                 return;
 477
 478         mutex_lock(&rdev->pm.mutex);
 479
 480         rdev->pm.active_crtcs = 0;
 481         rdev->pm.active_crtc_count = 0;
 482         list_for_each_entry(crtc,
 483                 &ddev->mode_config.crtc_list, head) {
 484                 radeon_crtc = to_radeon_crtc(crtc);
 485                 if (radeon_crtc->enabled) {
 486                         rdev->pm.active_crtcs |= (1 << radeon_crtc->crtc_id);
 487                         rdev->pm.active_crtc_count++;
 488                 }
 489         }
 490
 491         if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
 492                 radeon_pm_update_profile(rdev);
 493                 radeon_pm_set_clocks(rdev);
 494         } else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 495                 if (rdev->pm.dynpm_state != DYNPM_STATE_DISABLED) {
 496                         if (rdev->pm.active_crtc_count > 1) {
 497                                 if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) {
 498                                         cancel_delayed_work(&rdev->pm.dynpm_idle_work);
 499
 500                                         rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;
 501                                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
 502                                         radeon_pm_get_dynpm_state(rdev);
 503                                         radeon_pm_set_clocks(rdev);
 504
 505                                         DRM_DEBUG("radeon: dynamic power management deactivated\n");
 506                                 }
 507                         } else if (rdev->pm.active_crtc_count == 1) {
 508                                 /* TODO: Increase clocks if needed for current mode */
 509
 510                                 if (rdev->pm.dynpm_state == DYNPM_STATE_MINIMUM) {
 511                                         rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
 512                                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_UPCLOCK;
 513                                         radeon_pm_get_dynpm_state(rdev);
 514                                         radeon_pm_set_clocks(rdev);
 515
 516                                         queue_delayed_work(rdev->wq, &rdev->pm.dynpm_idle_work,
 517                                                            msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 518                                 } else if (rdev->pm.dynpm_state == DYNPM_STATE_PAUSED) {
 519                                         rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
 520                                         queue_delayed_work(rdev->wq, &rdev->pm.dynpm_idle_work,
 521                                                            msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 522                                         DRM_DEBUG("radeon: dynamic power management activated\n");
 523                                 }
 524                         } else { /* count == 0 */
 525                                 if (rdev->pm.dynpm_state != DYNPM_STATE_MINIMUM) {
 526                                         cancel_delayed_work(&rdev->pm.dynpm_idle_work);
 527
 528                                         rdev->pm.dynpm_state = DYNPM_STATE_MINIMUM;
 529                                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_MINIMUM;
 530                                         radeon_pm_get_dynpm_state(rdev);
 531                                         radeon_pm_set_clocks(rdev);
 532                                 }
 533                         }
 534                 }
 535         }
 536
 537         mutex_unlock(&rdev->pm.mutex);
 538 }
 539
 540 static bool radeon_pm_in_vbl(struct radeon_device *rdev)
 541 {
 542         u32 stat_crtc = 0, vbl = 0, position = 0;
 543         bool in_vbl = true;
 544
 545         if (ASIC_IS_DCE4(rdev)) {
 546                 if (rdev->pm.active_crtcs & (1 << 0)) {
 547                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 548                                      EVERGREEN_CRTC0_REGISTER_OFFSET) & 0xfff;
 549                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 550                                           EVERGREEN_CRTC0_REGISTER_OFFSET) & 0xfff;
 551                 }
 552                 if (rdev->pm.active_crtcs & (1 << 1)) {
 553                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 554                                      EVERGREEN_CRTC1_REGISTER_OFFSET) & 0xfff;
 555                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 556                                           EVERGREEN_CRTC1_REGISTER_OFFSET) & 0xfff;
 557                 }
 558                 if (rdev->pm.active_crtcs & (1 << 2)) {
 559                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 560                                      EVERGREEN_CRTC2_REGISTER_OFFSET) & 0xfff;
 561                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 562                                           EVERGREEN_CRTC2_REGISTER_OFFSET) & 0xfff;
 563                 }
 564                 if (rdev->pm.active_crtcs & (1 << 3)) {
 565                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 566                                      EVERGREEN_CRTC3_REGISTER_OFFSET) & 0xfff;
 567                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 568                                           EVERGREEN_CRTC3_REGISTER_OFFSET) & 0xfff;
 569                 }
 570                 if (rdev->pm.active_crtcs & (1 << 4)) {
 571                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 572                                      EVERGREEN_CRTC4_REGISTER_OFFSET) & 0xfff;
 573                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 574                                           EVERGREEN_CRTC4_REGISTER_OFFSET) & 0xfff;
 575                 }
 576                 if (rdev->pm.active_crtcs & (1 << 5)) {
 577                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 578                                      EVERGREEN_CRTC5_REGISTER_OFFSET) & 0xfff;
 579                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 580                                           EVERGREEN_CRTC5_REGISTER_OFFSET) & 0xfff;
 581                 }
 582         } else if (ASIC_IS_AVIVO(rdev)) {
 583                 if (rdev->pm.active_crtcs & (1 << 0)) {
 584                         vbl = RREG32(AVIVO_D1CRTC_V_BLANK_START_END) & 0xfff;
 585                         position = RREG32(AVIVO_D1CRTC_STATUS_POSITION) & 0xfff;
 586                 }
 587                 if (rdev->pm.active_crtcs & (1 << 1)) {
 588                         vbl = RREG32(AVIVO_D2CRTC_V_BLANK_START_END) & 0xfff;
 589                         position = RREG32(AVIVO_D2CRTC_STATUS_POSITION) & 0xfff;
 590                 }
 591                 if (position < vbl && position > 1)
 592                         in_vbl = false;
 593         } else {
 594                 if (rdev->pm.active_crtcs & (1 << 0)) {
 595                         stat_crtc = RREG32(RADEON_CRTC_STATUS);
 596                         if (!(stat_crtc & 1))
 597                                 in_vbl = false;
 598                 }
 599                 if (rdev->pm.active_crtcs & (1 << 1)) {
 600                         stat_crtc = RREG32(RADEON_CRTC2_STATUS);
 601                         if (!(stat_crtc & 1))
 602                                 in_vbl = false;
 603                 }
 604         }
 605
 606         if (position < vbl && position > 1)
 607                 in_vbl = false;
 608
 609         return in_vbl;
 610 }
 611
 612 static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish)
 613 {
 614         u32 stat_crtc = 0;
 615         bool in_vbl = radeon_pm_in_vbl(rdev);
 616
 617         if (in_vbl == false)
 618                 DRM_DEBUG("not in vbl for pm change %08x at %s\n", stat_crtc,
 619                          finish ? "exit" : "entry");
 620         return in_vbl;
 621 }
 622
 623 static void radeon_dynpm_idle_work_handler(struct work_struct *work)
 624 {
 625         struct radeon_device *rdev;
 626         int resched;
 627         rdev = container_of(work, struct radeon_device,
 628                                 pm.dynpm_idle_work.work);
 629
 630         resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev);
 631         mutex_lock(&rdev->pm.mutex);
 632         if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) {
 633                 unsigned long irq_flags;
 634                 int not_processed = 0;
 635
 636                 read_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
 637                 if (!list_empty(&rdev->fence_drv.emited)) {
 638                         struct list_head *ptr;
 639                         list_for_each(ptr, &rdev->fence_drv.emited) {
 640                                 /* count up to 3, that's enought info */
 641                                 if (++not_processed >= 3)
 642                                         break;
 643                         }
 644                 }
 645                 read_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
 646
 647                 if (not_processed >= 3) { /* should upclock */
 648                         if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_DOWNCLOCK) {
 649                                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 650                         } else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE &&
 651                                    rdev->pm.dynpm_can_upclock) {
 652                                 rdev->pm.dynpm_planned_action =
 653                                         DYNPM_ACTION_UPCLOCK;
 654                                 rdev->pm.dynpm_action_timeout = jiffies +
 655                                 msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
 656                         }
 657                 } else if (not_processed == 0) { /* should downclock */
 658                         if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_UPCLOCK) {
 659                                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 660                         } else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE &&
 661                                    rdev->pm.dynpm_can_downclock) {
 662                                 rdev->pm.dynpm_planned_action =
 663                                         DYNPM_ACTION_DOWNCLOCK;
 664                                 rdev->pm.dynpm_action_timeout = jiffies +
 665                                 msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
 666                         }
 667                 }
 668
 669                 /* Note, radeon_pm_set_clocks is called with static_switch set
 670                  * to false since we want to wait for vbl to avoid flicker.
 671                  */
 672                 if (rdev->pm.dynpm_planned_action != DYNPM_ACTION_NONE &&
 673                     jiffies > rdev->pm.dynpm_action_timeout) {
 674                         radeon_pm_get_dynpm_state(rdev);
 675                         radeon_pm_set_clocks(rdev);
 676                 }
 677         }
 678         mutex_unlock(&rdev->pm.mutex);
 679         ttm_bo_unlock_delayed_workqueue(&rdev->mman.bdev, resched);
 680
 681         queue_delayed_work(rdev->wq, &rdev->pm.dynpm_idle_work,
 682                                         msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 683 }
 684
 685 /*
 686  * Debugfs info
 687  */
 688 #if defined(CONFIG_DEBUG_FS)
 689
 690 static int radeon_debugfs_pm_info(struct seq_file *m, void *data)
 691 {
 692         struct drm_info_node *node = (struct drm_info_node *) m->private;
 693         struct drm_device *dev = node->minor->dev;
 694         struct radeon_device *rdev = dev->dev_private;
 695
 696         seq_printf(m, "default engine clock: %u0 kHz\n", rdev->clock.default_sclk);
 697         seq_printf(m, "current engine clock: %u0 kHz\n", radeon_get_engine_clock(rdev));
 698         seq_printf(m, "default memory clock: %u0 kHz\n", rdev->clock.default_mclk);
 699         if (rdev->asic->get_memory_clock)
 700                 seq_printf(m, "current memory clock: %u0 kHz\n", radeon_get_memory_clock(rdev));
 701         if (rdev->asic->get_pcie_lanes)
 702                 seq_printf(m, "PCIE lanes: %d\n", radeon_get_pcie_lanes(rdev));
 703
 704         return 0;
 705 }
 706
 707 static struct drm_info_list radeon_pm_info_list[] = {
 708         {"radeon_pm_info", radeon_debugfs_pm_info, 0, NULL},
 709 };
 710 #endif
 711
 712 static int radeon_debugfs_pm_init(struct radeon_device *rdev)
 713 {
 714 #if defined(CONFIG_DEBUG_FS)
 715         return radeon_debugfs_add_files(rdev, radeon_pm_info_list, ARRAY_SIZE(radeon_pm_info_list));
 716 #else
 717         return 0;
 718 #endif
 719 }