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 <drm/drmP.h>
  24 #include "radeon.h"
  25 #include "avivod.h"
  26 #include "atom.h"
  27 #include <linux/power_supply.h>
  28 #include <linux/hwmon.h>
  29 #include <linux/hwmon-sysfs.h>
  30
  31 #define RADEON_IDLE_LOOP_MS 100
  32 #define RADEON_RECLOCK_DELAY_MS 200
  33 #define RADEON_WAIT_VBLANK_TIMEOUT 200
  34
  35 static const char *radeon_pm_state_type_name[5] = {
  36         "",
  37         "Powersave",
  38         "Battery",
  39         "Balanced",
  40         "Performance",
  41 };
  42
  43 static void radeon_dynpm_idle_work_handler(struct work_struct *work);
  44 static int radeon_debugfs_pm_init(struct radeon_device *rdev);
  45 static bool radeon_pm_in_vbl(struct radeon_device *rdev);
  46 static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish);
  47 static void radeon_pm_update_profile(struct radeon_device *rdev);
  48 static void radeon_pm_set_clocks(struct radeon_device *rdev);
  49
  50 int radeon_pm_get_type_index(struct radeon_device *rdev,
  51                              enum radeon_pm_state_type ps_type,
  52                              int instance)
  53 {
  54         int i;
  55         int found_instance = -1;
  56
  57         for (i = 0; i < rdev->pm.num_power_states; i++) {
  58                 if (rdev->pm.power_state[i].type == ps_type) {
  59                         found_instance++;
  60                         if (found_instance == instance)
  61                                 return i;
  62                 }
  63         }
  64         /* return default if no match */
  65         return rdev->pm.default_power_state_index;
  66 }
  67
  68 void radeon_pm_acpi_event_handler(struct radeon_device *rdev)
  69 {
  70         if ((rdev->pm.pm_method == PM_METHOD_DPM) && rdev->pm.dpm_enabled) {
  71                 mutex_lock(&rdev->pm.mutex);
  72                 if (power_supply_is_system_supplied() > 0)
  73                         rdev->pm.dpm.ac_power = true;
  74                 else
  75                         rdev->pm.dpm.ac_power = false;
  76                 if (rdev->family == CHIP_ARUBA) {
  77                         if (rdev->asic->dpm.enable_bapm)
  78                                 radeon_dpm_enable_bapm(rdev, rdev->pm.dpm.ac_power);
  79                 }
  80                 mutex_unlock(&rdev->pm.mutex);
  81         } else if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
  82                 if (rdev->pm.profile == PM_PROFILE_AUTO) {
  83                         mutex_lock(&rdev->pm.mutex);
  84                         radeon_pm_update_profile(rdev);
  85                         radeon_pm_set_clocks(rdev);
  86                         mutex_unlock(&rdev->pm.mutex);
  87                 }
  88         }
  89 }
  90
  91 static void radeon_pm_update_profile(struct radeon_device *rdev)
  92 {
  93         switch (rdev->pm.profile) {
  94         case PM_PROFILE_DEFAULT:
  95                 rdev->pm.profile_index = PM_PROFILE_DEFAULT_IDX;
  96                 break;
  97         case PM_PROFILE_AUTO:
  98                 if (power_supply_is_system_supplied() > 0) {
  99                         if (rdev->pm.active_crtc_count > 1)
 100                                 rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;
 101                         else
 102                                 rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;
 103                 } else {
 104                         if (rdev->pm.active_crtc_count > 1)
 105                                 rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
 106                         else
 107                                 rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
 108                 }
 109                 break;
 110         case PM_PROFILE_LOW:
 111                 if (rdev->pm.active_crtc_count > 1)
 112                         rdev->pm.profile_index = PM_PROFILE_LOW_MH_IDX;
 113                 else
 114                         rdev->pm.profile_index = PM_PROFILE_LOW_SH_IDX;
 115                 break;
 116         case PM_PROFILE_MID:
 117                 if (rdev->pm.active_crtc_count > 1)
 118                         rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
 119                 else
 120                         rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
 121                 break;
 122         case PM_PROFILE_HIGH:
 123                 if (rdev->pm.active_crtc_count > 1)
 124                         rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;
 125                 else
 126                         rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;
 127                 break;
 128         }
 129
 130         if (rdev->pm.active_crtc_count == 0) {
 131                 rdev->pm.requested_power_state_index =
 132                         rdev->pm.profiles[rdev->pm.profile_index].dpms_off_ps_idx;
 133                 rdev->pm.requested_clock_mode_index =
 134                         rdev->pm.profiles[rdev->pm.profile_index].dpms_off_cm_idx;
 135         } else {
 136                 rdev->pm.requested_power_state_index =
 137                         rdev->pm.profiles[rdev->pm.profile_index].dpms_on_ps_idx;
 138                 rdev->pm.requested_clock_mode_index =
 139                         rdev->pm.profiles[rdev->pm.profile_index].dpms_on_cm_idx;
 140         }
 141 }
 142
 143 static void radeon_unmap_vram_bos(struct radeon_device *rdev)
 144 {
 145         struct radeon_bo *bo, *n;
 146
 147         if (list_empty(&rdev->gem.objects))
 148                 return;
 149
 150         list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
 151                 if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 152                         ttm_bo_unmap_virtual(&bo->tbo);
 153         }
 154 }
 155
 156 static void radeon_sync_with_vblank(struct radeon_device *rdev)
 157 {
 158         if (rdev->pm.active_crtcs) {
 159                 rdev->pm.vblank_sync = false;
 160                 wait_event_timeout(
 161                         rdev->irq.vblank_queue, rdev->pm.vblank_sync,
 162                         msecs_to_jiffies(RADEON_WAIT_VBLANK_TIMEOUT));
 163         }
 164 }
 165
 166 static void radeon_set_power_state(struct radeon_device *rdev)
 167 {
 168         u32 sclk, mclk;
 169         bool misc_after = false;
 170
 171         if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) &&
 172             (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index))
 173                 return;
 174
 175         if (radeon_gui_idle(rdev)) {
 176                 sclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
 177                         clock_info[rdev->pm.requested_clock_mode_index].sclk;
 178                 if (sclk > rdev->pm.default_sclk)
 179                         sclk = rdev->pm.default_sclk;
 180
 181                 /* starting with BTC, there is one state that is used for both
 182                  * MH and SH.  Difference is that we always use the high clock index for
 183                  * mclk and vddci.
 184                  */
 185                 if ((rdev->pm.pm_method == PM_METHOD_PROFILE) &&
 186                     (rdev->family >= CHIP_BARTS) &&
 187                     rdev->pm.active_crtc_count &&
 188                     ((rdev->pm.profile_index == PM_PROFILE_MID_MH_IDX) ||
 189                      (rdev->pm.profile_index == PM_PROFILE_LOW_MH_IDX)))
 190                         mclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
 191                                 clock_info[rdev->pm.profiles[PM_PROFILE_HIGH_MH_IDX].dpms_on_cm_idx].mclk;
 192                 else
 193                         mclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
 194                                 clock_info[rdev->pm.requested_clock_mode_index].mclk;
 195
 196                 if (mclk > rdev->pm.default_mclk)
 197                         mclk = rdev->pm.default_mclk;
 198
 199                 /* upvolt before raising clocks, downvolt after lowering clocks */
 200                 if (sclk < rdev->pm.current_sclk)
 201                         misc_after = true;
 202
 203                 radeon_sync_with_vblank(rdev);
 204
 205                 if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 206                         if (!radeon_pm_in_vbl(rdev))
 207                                 return;
 208                 }
 209
 210                 radeon_pm_prepare(rdev);
 211
 212                 if (!misc_after)
 213                         /* voltage, pcie lanes, etc.*/
 214                         radeon_pm_misc(rdev);
 215
 216                 /* set engine clock */
 217                 if (sclk != rdev->pm.current_sclk) {
 218                         radeon_pm_debug_check_in_vbl(rdev, false);
 219                         radeon_set_engine_clock(rdev, sclk);
 220                         radeon_pm_debug_check_in_vbl(rdev, true);
 221                         rdev->pm.current_sclk = sclk;
 222                         DRM_DEBUG_DRIVER("Setting: e: %d\n", sclk);
 223                 }
 224
 225                 /* set memory clock */
 226                 if (rdev->asic->pm.set_memory_clock && (mclk != rdev->pm.current_mclk)) {
 227                         radeon_pm_debug_check_in_vbl(rdev, false);
 228                         radeon_set_memory_clock(rdev, mclk);
 229                         radeon_pm_debug_check_in_vbl(rdev, true);
 230                         rdev->pm.current_mclk = mclk;
 231                         DRM_DEBUG_DRIVER("Setting: m: %d\n", mclk);
 232                 }
 233
 234                 if (misc_after)
 235                         /* voltage, pcie lanes, etc.*/
 236                         radeon_pm_misc(rdev);
 237
 238                 radeon_pm_finish(rdev);
 239
 240                 rdev->pm.current_power_state_index = rdev->pm.requested_power_state_index;
 241                 rdev->pm.current_clock_mode_index = rdev->pm.requested_clock_mode_index;
 242         } else
 243                 DRM_DEBUG_DRIVER("pm: GUI not idle!!!\n");
 244 }
 245
 246 static void radeon_pm_set_clocks(struct radeon_device *rdev)
 247 {
 248         int i, r;
 249
 250         /* no need to take locks, etc. if nothing's going to change */
 251         if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) &&
 252             (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index))
 253                 return;
 254
 255         mutex_lock(&rdev->ddev->struct_mutex);
 256         down_write(&rdev->pm.mclk_lock);
 257         mutex_lock(&rdev->ring_lock);
 258
 259         /* wait for the rings to drain */
 260         for (i = 0; i < RADEON_NUM_RINGS; i++) {
 261                 struct radeon_ring *ring = &rdev->ring[i];
 262                 if (!ring->ready) {
 263                         continue;
 264                 }
 265                 r = radeon_fence_wait_empty(rdev, i);
 266                 if (r) {
 267                         /* needs a GPU reset dont reset here */
 268                         mutex_unlock(&rdev->ring_lock);
 269                         up_write(&rdev->pm.mclk_lock);
 270                         mutex_unlock(&rdev->ddev->struct_mutex);
 271                         return;
 272                 }
 273         }
 274
 275         radeon_unmap_vram_bos(rdev);
 276
 277         if (rdev->irq.installed) {
 278                 for (i = 0; i < rdev->num_crtc; i++) {
 279                         if (rdev->pm.active_crtcs & (1 << i)) {
 280                                 rdev->pm.req_vblank |= (1 << i);
 281                                 drm_vblank_get(rdev->ddev, i);
 282                         }
 283                 }
 284         }
 285
 286         radeon_set_power_state(rdev);
 287
 288         if (rdev->irq.installed) {
 289                 for (i = 0; i < rdev->num_crtc; i++) {
 290                         if (rdev->pm.req_vblank & (1 << i)) {
 291                                 rdev->pm.req_vblank &= ~(1 << i);
 292                                 drm_vblank_put(rdev->ddev, i);
 293                         }
 294                 }
 295         }
 296
 297         /* update display watermarks based on new power state */
 298         radeon_update_bandwidth_info(rdev);
 299         if (rdev->pm.active_crtc_count)
 300                 radeon_bandwidth_update(rdev);
 301
 302         rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 303
 304         mutex_unlock(&rdev->ring_lock);
 305         up_write(&rdev->pm.mclk_lock);
 306         mutex_unlock(&rdev->ddev->struct_mutex);
 307 }
 308
 309 static void radeon_pm_print_states(struct radeon_device *rdev)
 310 {
 311         int i, j;
 312         struct radeon_power_state *power_state;
 313         struct radeon_pm_clock_info *clock_info;
 314
 315         DRM_DEBUG_DRIVER("%d Power State(s)\n", rdev->pm.num_power_states);
 316         for (i = 0; i < rdev->pm.num_power_states; i++) {
 317                 power_state = &rdev->pm.power_state[i];
 318                 DRM_DEBUG_DRIVER("State %d: %s\n", i,
 319                         radeon_pm_state_type_name[power_state->type]);
 320                 if (i == rdev->pm.default_power_state_index)
 321                         DRM_DEBUG_DRIVER("\tDefault");
 322                 if ((rdev->flags & RADEON_IS_PCIE) && !(rdev->flags & RADEON_IS_IGP))
 323                         DRM_DEBUG_DRIVER("\t%d PCIE Lanes\n", power_state->pcie_lanes);
 324                 if (power_state->flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY)
 325                         DRM_DEBUG_DRIVER("\tSingle display only\n");
 326                 DRM_DEBUG_DRIVER("\t%d Clock Mode(s)\n", power_state->num_clock_modes);
 327                 for (j = 0; j < power_state->num_clock_modes; j++) {
 328                         clock_info = &(power_state->clock_info[j]);
 329                         if (rdev->flags & RADEON_IS_IGP)
 330                                 DRM_DEBUG_DRIVER("\t\t%d e: %d\n",
 331                                                  j,
 332                                                  clock_info->sclk * 10);
 333                         else
 334                                 DRM_DEBUG_DRIVER("\t\t%d e: %d\tm: %d\tv: %d\n",
 335                                                  j,
 336                                                  clock_info->sclk * 10,
 337                                                  clock_info->mclk * 10,
 338                                                  clock_info->voltage.voltage);
 339                 }
 340         }
 341 }
 342
 343 static ssize_t radeon_get_pm_profile(struct device *dev,
 344                                      struct device_attribute *attr,
 345                                      char *buf)
 346 {
 347         struct drm_device *ddev = dev_get_drvdata(dev);
 348         struct radeon_device *rdev = ddev->dev_private;
 349         int cp = rdev->pm.profile;
 350
 351         return snprintf(buf, PAGE_SIZE, "%s\n",
 352                         (cp == PM_PROFILE_AUTO) ? "auto" :
 353                         (cp == PM_PROFILE_LOW) ? "low" :
 354                         (cp == PM_PROFILE_MID) ? "mid" :
 355                         (cp == PM_PROFILE_HIGH) ? "high" : "default");
 356 }
 357
 358 static ssize_t radeon_set_pm_profile(struct device *dev,
 359                                      struct device_attribute *attr,
 360                                      const char *buf,
 361                                      size_t count)
 362 {
 363         struct drm_device *ddev = dev_get_drvdata(dev);
 364         struct radeon_device *rdev = ddev->dev_private;
 365
 366         /* Can't set profile when the card is off */
 367         if  ((rdev->flags & RADEON_IS_PX) &&
 368              (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
 369                 return -EINVAL;
 370
 371         mutex_lock(&rdev->pm.mutex);
 372         if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
 373                 if (strncmp("default", buf, strlen("default")) == 0)
 374                         rdev->pm.profile = PM_PROFILE_DEFAULT;
 375                 else if (strncmp("auto", buf, strlen("auto")) == 0)
 376                         rdev->pm.profile = PM_PROFILE_AUTO;
 377                 else if (strncmp("low", buf, strlen("low")) == 0)
 378                         rdev->pm.profile = PM_PROFILE_LOW;
 379                 else if (strncmp("mid", buf, strlen("mid")) == 0)
 380                         rdev->pm.profile = PM_PROFILE_MID;
 381                 else if (strncmp("high", buf, strlen("high")) == 0)
 382                         rdev->pm.profile = PM_PROFILE_HIGH;
 383                 else {
 384                         count = -EINVAL;
 385                         goto fail;
 386                 }
 387                 radeon_pm_update_profile(rdev);
 388                 radeon_pm_set_clocks(rdev);
 389         } else
 390                 count = -EINVAL;
 391
 392 fail:
 393         mutex_unlock(&rdev->pm.mutex);
 394
 395         return count;
 396 }
 397
 398 static ssize_t radeon_get_pm_method(struct device *dev,
 399                                     struct device_attribute *attr,
 400                                     char *buf)
 401 {
 402         struct drm_device *ddev = dev_get_drvdata(dev);
 403         struct radeon_device *rdev = ddev->dev_private;
 404         int pm = rdev->pm.pm_method;
 405
 406         return snprintf(buf, PAGE_SIZE, "%s\n",
 407                         (pm == PM_METHOD_DYNPM) ? "dynpm" :
 408                         (pm == PM_METHOD_PROFILE) ? "profile" : "dpm");
 409 }
 410
 411 static ssize_t radeon_set_pm_method(struct device *dev,
 412                                     struct device_attribute *attr,
 413                                     const char *buf,
 414                                     size_t count)
 415 {
 416         struct drm_device *ddev = dev_get_drvdata(dev);
 417         struct radeon_device *rdev = ddev->dev_private;
 418
 419         /* Can't set method when the card is off */
 420         if  ((rdev->flags & RADEON_IS_PX) &&
 421              (ddev->switch_power_state != DRM_SWITCH_POWER_ON)) {
 422                 count = -EINVAL;
 423                 goto fail;
 424         }
 425
 426         /* we don't support the legacy modes with dpm */
 427         if (rdev->pm.pm_method == PM_METHOD_DPM) {
 428                 count = -EINVAL;
 429                 goto fail;
 430         }
 431
 432         if (strncmp("dynpm", buf, strlen("dynpm")) == 0) {
 433                 mutex_lock(&rdev->pm.mutex);
 434                 rdev->pm.pm_method = PM_METHOD_DYNPM;
 435                 rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;
 436                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
 437                 mutex_unlock(&rdev->pm.mutex);
 438         } else if (strncmp("profile", buf, strlen("profile")) == 0) {
 439                 mutex_lock(&rdev->pm.mutex);
 440                 /* disable dynpm */
 441                 rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
 442                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 443                 rdev->pm.pm_method = PM_METHOD_PROFILE;
 444                 mutex_unlock(&rdev->pm.mutex);
 445                 cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
 446         } else {
 447                 count = -EINVAL;
 448                 goto fail;
 449         }
 450         radeon_pm_compute_clocks(rdev);
 451 fail:
 452         return count;
 453 }
 454
 455 static ssize_t radeon_get_dpm_state(struct device *dev,
 456                                     struct device_attribute *attr,
 457                                     char *buf)
 458 {
 459         struct drm_device *ddev = dev_get_drvdata(dev);
 460         struct radeon_device *rdev = ddev->dev_private;
 461         enum radeon_pm_state_type pm = rdev->pm.dpm.user_state;
 462
 463         return snprintf(buf, PAGE_SIZE, "%s\n",
 464                         (pm == POWER_STATE_TYPE_BATTERY) ? "battery" :
 465                         (pm == POWER_STATE_TYPE_BALANCED) ? "balanced" : "performance");
 466 }
 467
 468 static ssize_t radeon_set_dpm_state(struct device *dev,
 469                                     struct device_attribute *attr,
 470                                     const char *buf,
 471                                     size_t count)
 472 {
 473         struct drm_device *ddev = dev_get_drvdata(dev);
 474         struct radeon_device *rdev = ddev->dev_private;
 475
 476         mutex_lock(&rdev->pm.mutex);
 477         if (strncmp("battery", buf, strlen("battery")) == 0)
 478                 rdev->pm.dpm.user_state = POWER_STATE_TYPE_BATTERY;
 479         else if (strncmp("balanced", buf, strlen("balanced")) == 0)
 480                 rdev->pm.dpm.user_state = POWER_STATE_TYPE_BALANCED;
 481         else if (strncmp("performance", buf, strlen("performance")) == 0)
 482                 rdev->pm.dpm.user_state = POWER_STATE_TYPE_PERFORMANCE;
 483         else {
 484                 mutex_unlock(&rdev->pm.mutex);
 485                 count = -EINVAL;
 486                 goto fail;
 487         }
 488         mutex_unlock(&rdev->pm.mutex);
 489
 490         /* Can't set dpm state when the card is off */
 491         if (!(rdev->flags & RADEON_IS_PX) ||
 492             (ddev->switch_power_state == DRM_SWITCH_POWER_ON))
 493                 radeon_pm_compute_clocks(rdev);
 494
 495 fail:
 496         return count;
 497 }
 498
 499 static ssize_t radeon_get_dpm_forced_performance_level(struct device *dev,
 500                                                        struct device_attribute *attr,
 501                                                        char *buf)
 502 {
 503         struct drm_device *ddev = dev_get_drvdata(dev);
 504         struct radeon_device *rdev = ddev->dev_private;
 505         enum radeon_dpm_forced_level level = rdev->pm.dpm.forced_level;
 506
 507         if  ((rdev->flags & RADEON_IS_PX) &&
 508              (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
 509                 return snprintf(buf, PAGE_SIZE, "off\n");
 510
 511         return snprintf(buf, PAGE_SIZE, "%s\n",
 512                         (level == RADEON_DPM_FORCED_LEVEL_AUTO) ? "auto" :
 513                         (level == RADEON_DPM_FORCED_LEVEL_LOW) ? "low" : "high");
 514 }
 515
 516 static ssize_t radeon_set_dpm_forced_performance_level(struct device *dev,
 517                                                        struct device_attribute *attr,
 518                                                        const char *buf,
 519                                                        size_t count)
 520 {
 521         struct drm_device *ddev = dev_get_drvdata(dev);
 522         struct radeon_device *rdev = ddev->dev_private;
 523         enum radeon_dpm_forced_level level;
 524         int ret = 0;
 525
 526         /* Can't force performance level when the card is off */
 527         if  ((rdev->flags & RADEON_IS_PX) &&
 528              (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
 529                 return -EINVAL;
 530
 531         mutex_lock(&rdev->pm.mutex);
 532         if (strncmp("low", buf, strlen("low")) == 0) {
 533                 level = RADEON_DPM_FORCED_LEVEL_LOW;
 534         } else if (strncmp("high", buf, strlen("high")) == 0) {
 535                 level = RADEON_DPM_FORCED_LEVEL_HIGH;
 536         } else if (strncmp("auto", buf, strlen("auto")) == 0) {
 537                 level = RADEON_DPM_FORCED_LEVEL_AUTO;
 538         } else {
 539                 count = -EINVAL;
 540                 goto fail;
 541         }
 542         if (rdev->asic->dpm.force_performance_level) {
 543                 if (rdev->pm.dpm.thermal_active) {
 544                         count = -EINVAL;
 545                         goto fail;
 546                 }
 547                 ret = radeon_dpm_force_performance_level(rdev, level);
 548                 if (ret)
 549                         count = -EINVAL;
 550         }
 551 fail:
 552         mutex_unlock(&rdev->pm.mutex);
 553
 554         return count;
 555 }
 556
 557 static DEVICE_ATTR(power_profile, S_IRUGO | S_IWUSR, radeon_get_pm_profile, radeon_set_pm_profile);
 558 static DEVICE_ATTR(power_method, S_IRUGO | S_IWUSR, radeon_get_pm_method, radeon_set_pm_method);
 559 static DEVICE_ATTR(power_dpm_state, S_IRUGO | S_IWUSR, radeon_get_dpm_state, radeon_set_dpm_state);
 560 static DEVICE_ATTR(power_dpm_force_performance_level, S_IRUGO | S_IWUSR,
 561                    radeon_get_dpm_forced_performance_level,
 562                    radeon_set_dpm_forced_performance_level);
 563
 564 static ssize_t radeon_hwmon_show_temp(struct device *dev,
 565                                       struct device_attribute *attr,
 566                                       char *buf)
 567 {
 568         struct radeon_device *rdev = dev_get_drvdata(dev);
 569         struct drm_device *ddev = rdev->ddev;
 570         int temp;
 571
 572         /* Can't get temperature when the card is off */
 573         if  ((rdev->flags & RADEON_IS_PX) &&
 574              (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
 575                 return -EINVAL;
 576
 577         if (rdev->asic->pm.get_temperature)
 578                 temp = radeon_get_temperature(rdev);
 579         else
 580                 temp = 0;
 581
 582         return snprintf(buf, PAGE_SIZE, "%d\n", temp);
 583 }
 584
 585 static ssize_t radeon_hwmon_show_temp_thresh(struct device *dev,
 586                                              struct device_attribute *attr,
 587                                              char *buf)
 588 {
 589         struct radeon_device *rdev = dev_get_drvdata(dev);
 590         int hyst = to_sensor_dev_attr(attr)->index;
 591         int temp;
 592
 593         if (hyst)
 594                 temp = rdev->pm.dpm.thermal.min_temp;
 595         else
 596                 temp = rdev->pm.dpm.thermal.max_temp;
 597
 598         return snprintf(buf, PAGE_SIZE, "%d\n", temp);
 599 }
 600
 601 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, radeon_hwmon_show_temp, NULL, 0);
 602 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, radeon_hwmon_show_temp_thresh, NULL, 0);
 603 static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO, radeon_hwmon_show_temp_thresh, NULL, 1);
 604
 605 static struct attribute *hwmon_attributes[] = {
 606         &sensor_dev_attr_temp1_input.dev_attr.attr,
 607         &sensor_dev_attr_temp1_crit.dev_attr.attr,
 608         &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
 609         NULL
 610 };
 611
 612 static umode_t hwmon_attributes_visible(struct kobject *kobj,
 613                                         struct attribute *attr, int index)
 614 {
 615         struct device *dev = container_of(kobj, struct device, kobj);
 616         struct radeon_device *rdev = dev_get_drvdata(dev);
 617
 618         /* Skip limit attributes if DPM is not enabled */
 619         if (rdev->pm.pm_method != PM_METHOD_DPM &&
 620             (attr == &sensor_dev_attr_temp1_crit.dev_attr.attr ||
 621              attr == &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr))
 622                 return 0;
 623
 624         return attr->mode;
 625 }
 626
 627 static const struct attribute_group hwmon_attrgroup = {
 628         .attrs = hwmon_attributes,
 629         .is_visible = hwmon_attributes_visible,
 630 };
 631
 632 static const struct attribute_group *hwmon_groups[] = {
 633         &hwmon_attrgroup,
 634         NULL
 635 };
 636
 637 static int radeon_hwmon_init(struct radeon_device *rdev)
 638 {
 639         int err = 0;
 640
 641         switch (rdev->pm.int_thermal_type) {
 642         case THERMAL_TYPE_RV6XX:
 643         case THERMAL_TYPE_RV770:
 644         case THERMAL_TYPE_EVERGREEN:
 645         case THERMAL_TYPE_NI:
 646         case THERMAL_TYPE_SUMO:
 647         case THERMAL_TYPE_SI:
 648         case THERMAL_TYPE_CI:
 649         case THERMAL_TYPE_KV:
 650                 if (rdev->asic->pm.get_temperature == NULL)
 651                         return err;
 652                 rdev->pm.int_hwmon_dev = hwmon_device_register_with_groups(rdev->dev,
 653                                                                            "radeon", rdev,
 654                                                                            hwmon_groups);
 655                 if (IS_ERR(rdev->pm.int_hwmon_dev)) {
 656                         err = PTR_ERR(rdev->pm.int_hwmon_dev);
 657                         dev_err(rdev->dev,
 658                                 "Unable to register hwmon device: %d\n", err);
 659                 }
 660                 break;
 661         default:
 662                 break;
 663         }
 664
 665         return err;
 666 }
 667
 668 static void radeon_hwmon_fini(struct radeon_device *rdev)
 669 {
 670         if (rdev->pm.int_hwmon_dev)
 671                 hwmon_device_unregister(rdev->pm.int_hwmon_dev);
 672 }
 673
 674 static void radeon_dpm_thermal_work_handler(struct work_struct *work)
 675 {
 676         struct radeon_device *rdev =
 677                 container_of(work, struct radeon_device,
 678                              pm.dpm.thermal.work);
 679         /* switch to the thermal state */
 680         enum radeon_pm_state_type dpm_state = POWER_STATE_TYPE_INTERNAL_THERMAL;
 681
 682         if (!rdev->pm.dpm_enabled)
 683                 return;
 684
 685         if (rdev->asic->pm.get_temperature) {
 686                 int temp = radeon_get_temperature(rdev);
 687
 688                 if (temp < rdev->pm.dpm.thermal.min_temp)
 689                         /* switch back the user state */
 690                         dpm_state = rdev->pm.dpm.user_state;
 691         } else {
 692                 if (rdev->pm.dpm.thermal.high_to_low)
 693                         /* switch back the user state */
 694                         dpm_state = rdev->pm.dpm.user_state;
 695         }
 696         mutex_lock(&rdev->pm.mutex);
 697         if (dpm_state == POWER_STATE_TYPE_INTERNAL_THERMAL)
 698                 rdev->pm.dpm.thermal_active = true;
 699         else
 700                 rdev->pm.dpm.thermal_active = false;
 701         rdev->pm.dpm.state = dpm_state;
 702         mutex_unlock(&rdev->pm.mutex);
 703
 704         radeon_pm_compute_clocks(rdev);
 705 }
 706
 707 static struct radeon_ps *radeon_dpm_pick_power_state(struct radeon_device *rdev,
 708                                                      enum radeon_pm_state_type dpm_state)
 709 {
 710         int i;
 711         struct radeon_ps *ps;
 712         u32 ui_class;
 713         bool single_display = (rdev->pm.dpm.new_active_crtc_count < 2) ?
 714                 true : false;
 715
 716         /* check if the vblank period is too short to adjust the mclk */
 717         if (single_display && rdev->asic->dpm.vblank_too_short) {
 718                 if (radeon_dpm_vblank_too_short(rdev))
 719                         single_display = false;
 720         }
 721
 722         /* certain older asics have a separare 3D performance state,
 723          * so try that first if the user selected performance
 724          */
 725         if (dpm_state == POWER_STATE_TYPE_PERFORMANCE)
 726                 dpm_state = POWER_STATE_TYPE_INTERNAL_3DPERF;
 727         /* balanced states don't exist at the moment */
 728         if (dpm_state == POWER_STATE_TYPE_BALANCED)
 729                 dpm_state = POWER_STATE_TYPE_PERFORMANCE;
 730
 731 restart_search:
 732         /* Pick the best power state based on current conditions */
 733         for (i = 0; i < rdev->pm.dpm.num_ps; i++) {
 734                 ps = &rdev->pm.dpm.ps[i];
 735                 ui_class = ps->class & ATOM_PPLIB_CLASSIFICATION_UI_MASK;
 736                 switch (dpm_state) {
 737                 /* user states */
 738                 case POWER_STATE_TYPE_BATTERY:
 739                         if (ui_class == ATOM_PPLIB_CLASSIFICATION_UI_BATTERY) {
 740                                 if (ps->caps & ATOM_PPLIB_SINGLE_DISPLAY_ONLY) {
 741                                         if (single_display)
 742                                                 return ps;
 743                                 } else
 744                                         return ps;
 745                         }
 746                         break;
 747                 case POWER_STATE_TYPE_BALANCED:
 748                         if (ui_class == ATOM_PPLIB_CLASSIFICATION_UI_BALANCED) {
 749                                 if (ps->caps & ATOM_PPLIB_SINGLE_DISPLAY_ONLY) {
 750                                         if (single_display)
 751                                                 return ps;
 752                                 } else
 753                                         return ps;
 754                         }
 755                         break;
 756                 case POWER_STATE_TYPE_PERFORMANCE:
 757                         if (ui_class == ATOM_PPLIB_CLASSIFICATION_UI_PERFORMANCE) {
 758                                 if (ps->caps & ATOM_PPLIB_SINGLE_DISPLAY_ONLY) {
 759                                         if (single_display)
 760                                                 return ps;
 761                                 } else
 762                                         return ps;
 763                         }
 764                         break;
 765                 /* internal states */
 766                 case POWER_STATE_TYPE_INTERNAL_UVD:
 767                         if (rdev->pm.dpm.uvd_ps)
 768                                 return rdev->pm.dpm.uvd_ps;
 769                         else
 770                                 break;
 771                 case POWER_STATE_TYPE_INTERNAL_UVD_SD:
 772                         if (ps->class & ATOM_PPLIB_CLASSIFICATION_SDSTATE)
 773                                 return ps;
 774                         break;
 775                 case POWER_STATE_TYPE_INTERNAL_UVD_HD:
 776                         if (ps->class & ATOM_PPLIB_CLASSIFICATION_HDSTATE)
 777                                 return ps;
 778                         break;
 779                 case POWER_STATE_TYPE_INTERNAL_UVD_HD2:
 780                         if (ps->class & ATOM_PPLIB_CLASSIFICATION_HD2STATE)
 781                                 return ps;
 782                         break;
 783                 case POWER_STATE_TYPE_INTERNAL_UVD_MVC:
 784                         if (ps->class2 & ATOM_PPLIB_CLASSIFICATION2_MVC)
 785                                 return ps;
 786                         break;
 787                 case POWER_STATE_TYPE_INTERNAL_BOOT:
 788                         return rdev->pm.dpm.boot_ps;
 789                 case POWER_STATE_TYPE_INTERNAL_THERMAL:
 790                         if (ps->class & ATOM_PPLIB_CLASSIFICATION_THERMAL)
 791                                 return ps;
 792                         break;
 793                 case POWER_STATE_TYPE_INTERNAL_ACPI:
 794                         if (ps->class & ATOM_PPLIB_CLASSIFICATION_ACPI)
 795                                 return ps;
 796                         break;
 797                 case POWER_STATE_TYPE_INTERNAL_ULV:
 798                         if (ps->class2 & ATOM_PPLIB_CLASSIFICATION2_ULV)
 799                                 return ps;
 800                         break;
 801                 case POWER_STATE_TYPE_INTERNAL_3DPERF:
 802                         if (ps->class & ATOM_PPLIB_CLASSIFICATION_3DPERFORMANCE)
 803                                 return ps;
 804                         break;
 805                 default:
 806                         break;
 807                 }
 808         }
 809         /* use a fallback state if we didn't match */
 810         switch (dpm_state) {
 811         case POWER_STATE_TYPE_INTERNAL_UVD_SD:
 812                 dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD;
 813                 goto restart_search;
 814         case POWER_STATE_TYPE_INTERNAL_UVD_HD:
 815         case POWER_STATE_TYPE_INTERNAL_UVD_HD2:
 816         case POWER_STATE_TYPE_INTERNAL_UVD_MVC:
 817                 if (rdev->pm.dpm.uvd_ps) {
 818                         return rdev->pm.dpm.uvd_ps;
 819                 } else {
 820                         dpm_state = POWER_STATE_TYPE_PERFORMANCE;
 821                         goto restart_search;
 822                 }
 823         case POWER_STATE_TYPE_INTERNAL_THERMAL:
 824                 dpm_state = POWER_STATE_TYPE_INTERNAL_ACPI;
 825                 goto restart_search;
 826         case POWER_STATE_TYPE_INTERNAL_ACPI:
 827                 dpm_state = POWER_STATE_TYPE_BATTERY;
 828                 goto restart_search;
 829         case POWER_STATE_TYPE_BATTERY:
 830         case POWER_STATE_TYPE_BALANCED:
 831         case POWER_STATE_TYPE_INTERNAL_3DPERF:
 832                 dpm_state = POWER_STATE_TYPE_PERFORMANCE;
 833                 goto restart_search;
 834         default:
 835                 break;
 836         }
 837
 838         return NULL;
 839 }
 840
 841 static void radeon_dpm_change_power_state_locked(struct radeon_device *rdev)
 842 {
 843         int i;
 844         struct radeon_ps *ps;
 845         enum radeon_pm_state_type dpm_state;
 846         int ret;
 847
 848         /* if dpm init failed */
 849         if (!rdev->pm.dpm_enabled)
 850                 return;
 851
 852         if (rdev->pm.dpm.user_state != rdev->pm.dpm.state) {
 853                 /* add other state override checks here */
 854                 if ((!rdev->pm.dpm.thermal_active) &&
 855                     (!rdev->pm.dpm.uvd_active))
 856                         rdev->pm.dpm.state = rdev->pm.dpm.user_state;
 857         }
 858         dpm_state = rdev->pm.dpm.state;
 859
 860         ps = radeon_dpm_pick_power_state(rdev, dpm_state);
 861         if (ps)
 862                 rdev->pm.dpm.requested_ps = ps;
 863         else
 864                 return;
 865
 866         /* no need to reprogram if nothing changed unless we are on BTC+ */
 867         if (rdev->pm.dpm.current_ps == rdev->pm.dpm.requested_ps) {
 868                 /* vce just modifies an existing state so force a change */
 869                 if (ps->vce_active != rdev->pm.dpm.vce_active)
 870                         goto force;
 871                 if ((rdev->family < CHIP_BARTS) || (rdev->flags & RADEON_IS_IGP)) {
 872                         /* for pre-BTC and APUs if the num crtcs changed but state is the same,
 873                          * all we need to do is update the display configuration.
 874                          */
 875                         if (rdev->pm.dpm.new_active_crtcs != rdev->pm.dpm.current_active_crtcs) {
 876                                 /* update display watermarks based on new power state */
 877                                 radeon_bandwidth_update(rdev);
 878                                 /* update displays */
 879                                 radeon_dpm_display_configuration_changed(rdev);
 880                                 rdev->pm.dpm.current_active_crtcs = rdev->pm.dpm.new_active_crtcs;
 881                                 rdev->pm.dpm.current_active_crtc_count = rdev->pm.dpm.new_active_crtc_count;
 882                         }
 883                         return;
 884                 } else {
 885                         /* for BTC+ if the num crtcs hasn't changed and state is the same,
 886                          * nothing to do, if the num crtcs is > 1 and state is the same,
 887                          * update display configuration.
 888                          */
 889                         if (rdev->pm.dpm.new_active_crtcs ==
 890                             rdev->pm.dpm.current_active_crtcs) {
 891                                 return;
 892                         } else {
 893                                 if ((rdev->pm.dpm.current_active_crtc_count > 1) &&
 894                                     (rdev->pm.dpm.new_active_crtc_count > 1)) {
 895                                         /* update display watermarks based on new power state */
 896                                         radeon_bandwidth_update(rdev);
 897                                         /* update displays */
 898                                         radeon_dpm_display_configuration_changed(rdev);
 899                                         rdev->pm.dpm.current_active_crtcs = rdev->pm.dpm.new_active_crtcs;
 900                                         rdev->pm.dpm.current_active_crtc_count = rdev->pm.dpm.new_active_crtc_count;
 901                                         return;
 902                                 }
 903                         }
 904                 }
 905         }
 906
 907 force:
 908         if (radeon_dpm == 1) {
 909                 printk("switching from power state:\n");
 910                 radeon_dpm_print_power_state(rdev, rdev->pm.dpm.current_ps);
 911                 printk("switching to power state:\n");
 912                 radeon_dpm_print_power_state(rdev, rdev->pm.dpm.requested_ps);
 913         }
 914
 915         mutex_lock(&rdev->ddev->struct_mutex);
 916         down_write(&rdev->pm.mclk_lock);
 917         mutex_lock(&rdev->ring_lock);
 918
 919         /* update whether vce is active */
 920         ps->vce_active = rdev->pm.dpm.vce_active;
 921
 922         ret = radeon_dpm_pre_set_power_state(rdev);
 923         if (ret)
 924                 goto done;
 925
 926         /* update display watermarks based on new power state */
 927         radeon_bandwidth_update(rdev);
 928         /* update displays */
 929         radeon_dpm_display_configuration_changed(rdev);
 930
 931         rdev->pm.dpm.current_active_crtcs = rdev->pm.dpm.new_active_crtcs;
 932         rdev->pm.dpm.current_active_crtc_count = rdev->pm.dpm.new_active_crtc_count;
 933
 934         /* wait for the rings to drain */
 935         for (i = 0; i < RADEON_NUM_RINGS; i++) {
 936                 struct radeon_ring *ring = &rdev->ring[i];
 937                 if (ring->ready)
 938                         radeon_fence_wait_empty(rdev, i);
 939         }
 940
 941         /* program the new power state */
 942         radeon_dpm_set_power_state(rdev);
 943
 944         /* update current power state */
 945         rdev->pm.dpm.current_ps = rdev->pm.dpm.requested_ps;
 946
 947         radeon_dpm_post_set_power_state(rdev);
 948
 949         if (rdev->asic->dpm.force_performance_level) {
 950                 if (rdev->pm.dpm.thermal_active) {
 951                         enum radeon_dpm_forced_level level = rdev->pm.dpm.forced_level;
 952                         /* force low perf level for thermal */
 953                         radeon_dpm_force_performance_level(rdev, RADEON_DPM_FORCED_LEVEL_LOW);
 954                         /* save the user's level */
 955                         rdev->pm.dpm.forced_level = level;
 956                 } else {
 957                         /* otherwise, user selected level */
 958                         radeon_dpm_force_performance_level(rdev, rdev->pm.dpm.forced_level);
 959                 }
 960         }
 961
 962 done:
 963         mutex_unlock(&rdev->ring_lock);
 964         up_write(&rdev->pm.mclk_lock);
 965         mutex_unlock(&rdev->ddev->struct_mutex);
 966 }
 967
 968 void radeon_dpm_enable_uvd(struct radeon_device *rdev, bool enable)
 969 {
 970         enum radeon_pm_state_type dpm_state;
 971
 972         if (rdev->asic->dpm.powergate_uvd) {
 973                 mutex_lock(&rdev->pm.mutex);
 974                 /* don't powergate anything if we
 975                    have active but pause streams */
 976                 enable |= rdev->pm.dpm.sd > 0;
 977                 enable |= rdev->pm.dpm.hd > 0;
 978                 /* enable/disable UVD */
 979                 radeon_dpm_powergate_uvd(rdev, !enable);
 980                 mutex_unlock(&rdev->pm.mutex);
 981         } else {
 982                 if (enable) {
 983                         mutex_lock(&rdev->pm.mutex);
 984                         rdev->pm.dpm.uvd_active = true;
 985                         /* disable this for now */
 986 #if 0
 987                         if ((rdev->pm.dpm.sd == 1) && (rdev->pm.dpm.hd == 0))
 988                                 dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_SD;
 989                         else if ((rdev->pm.dpm.sd == 2) && (rdev->pm.dpm.hd == 0))
 990                                 dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD;
 991                         else if ((rdev->pm.dpm.sd == 0) && (rdev->pm.dpm.hd == 1))
 992                                 dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD;
 993                         else if ((rdev->pm.dpm.sd == 0) && (rdev->pm.dpm.hd == 2))
 994                                 dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD2;
 995                         else
 996 #endif
 997                                 dpm_state = POWER_STATE_TYPE_INTERNAL_UVD;
 998                         rdev->pm.dpm.state = dpm_state;
 999                         mutex_unlock(&rdev->pm.mutex);
1000                 } else {
1001                         mutex_lock(&rdev->pm.mutex);
1002                         rdev->pm.dpm.uvd_active = false;
1003                         mutex_unlock(&rdev->pm.mutex);
1004                 }
1005
1006                 radeon_pm_compute_clocks(rdev);
1007         }
1008 }
1009
1010 void radeon_dpm_enable_vce(struct radeon_device *rdev, bool enable)
1011 {
1012         if (enable) {
1013                 mutex_lock(&rdev->pm.mutex);
1014                 rdev->pm.dpm.vce_active = true;
1015                 /* XXX select vce level based on ring/task */
1016                 rdev->pm.dpm.vce_level = RADEON_VCE_LEVEL_AC_ALL;
1017                 mutex_unlock(&rdev->pm.mutex);
1018         } else {
1019                 mutex_lock(&rdev->pm.mutex);
1020                 rdev->pm.dpm.vce_active = false;
1021                 mutex_unlock(&rdev->pm.mutex);
1022         }
1023
1024         radeon_pm_compute_clocks(rdev);
1025 }
1026
1027 static void radeon_pm_suspend_old(struct radeon_device *rdev)
1028 {
1029         mutex_lock(&rdev->pm.mutex);
1030         if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
1031                 if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE)
1032                         rdev->pm.dynpm_state = DYNPM_STATE_SUSPENDED;
1033         }
1034         mutex_unlock(&rdev->pm.mutex);
1035
1036         cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
1037 }
1038
1039 static void radeon_pm_suspend_dpm(struct radeon_device *rdev)
1040 {
1041         mutex_lock(&rdev->pm.mutex);
1042         /* disable dpm */
1043         radeon_dpm_disable(rdev);
1044         /* reset the power state */
1045         rdev->pm.dpm.current_ps = rdev->pm.dpm.requested_ps = rdev->pm.dpm.boot_ps;
1046         rdev->pm.dpm_enabled = false;
1047         mutex_unlock(&rdev->pm.mutex);
1048 }
1049
1050 void radeon_pm_suspend(struct radeon_device *rdev)
1051 {
1052         if (rdev->pm.pm_method == PM_METHOD_DPM)
1053                 radeon_pm_suspend_dpm(rdev);
1054         else
1055                 radeon_pm_suspend_old(rdev);
1056 }
1057
1058 static void radeon_pm_resume_old(struct radeon_device *rdev)
1059 {
1060         /* set up the default clocks if the MC ucode is loaded */
1061         if ((rdev->family >= CHIP_BARTS) &&
1062             (rdev->family <= CHIP_CAYMAN) &&
1063             rdev->mc_fw) {
1064                 if (rdev->pm.default_vddc)
1065                         radeon_atom_set_voltage(rdev, rdev->pm.default_vddc,
1066                                                 SET_VOLTAGE_TYPE_ASIC_VDDC);
1067                 if (rdev->pm.default_vddci)
1068                         radeon_atom_set_voltage(rdev, rdev->pm.default_vddci,
1069                                                 SET_VOLTAGE_TYPE_ASIC_VDDCI);
1070                 if (rdev->pm.default_sclk)
1071                         radeon_set_engine_clock(rdev, rdev->pm.default_sclk);
1072                 if (rdev->pm.default_mclk)
1073                         radeon_set_memory_clock(rdev, rdev->pm.default_mclk);
1074         }
1075         /* asic init will reset the default power state */
1076         mutex_lock(&rdev->pm.mutex);
1077         rdev->pm.current_power_state_index = rdev->pm.default_power_state_index;
1078         rdev->pm.current_clock_mode_index = 0;
1079         rdev->pm.current_sclk = rdev->pm.default_sclk;
1080         rdev->pm.current_mclk = rdev->pm.default_mclk;
1081         if (rdev->pm.power_state) {
1082                 rdev->pm.current_vddc = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage;
1083                 rdev->pm.current_vddci = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.vddci;
1084         }
1085         if (rdev->pm.pm_method == PM_METHOD_DYNPM
1086             && rdev->pm.dynpm_state == DYNPM_STATE_SUSPENDED) {
1087                 rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
1088                 schedule_delayed_work(&rdev->pm.dynpm_idle_work,
1089                                       msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
1090         }
1091         mutex_unlock(&rdev->pm.mutex);
1092         radeon_pm_compute_clocks(rdev);
1093 }
1094
1095 static void radeon_pm_resume_dpm(struct radeon_device *rdev)
1096 {
1097         int ret;
1098
1099         /* asic init will reset to the boot state */
1100         mutex_lock(&rdev->pm.mutex);
1101         rdev->pm.dpm.current_ps = rdev->pm.dpm.requested_ps = rdev->pm.dpm.boot_ps;
1102         radeon_dpm_setup_asic(rdev);
1103         ret = radeon_dpm_enable(rdev);
1104         mutex_unlock(&rdev->pm.mutex);
1105         if (ret)
1106                 goto dpm_resume_fail;
1107         rdev->pm.dpm_enabled = true;
1108         return;
1109
1110 dpm_resume_fail:
1111         DRM_ERROR("radeon: dpm resume failed\n");
1112         if ((rdev->family >= CHIP_BARTS) &&
1113             (rdev->family <= CHIP_CAYMAN) &&
1114             rdev->mc_fw) {
1115                 if (rdev->pm.default_vddc)
1116                         radeon_atom_set_voltage(rdev, rdev->pm.default_vddc,
1117                                                 SET_VOLTAGE_TYPE_ASIC_VDDC);
1118                 if (rdev->pm.default_vddci)
1119                         radeon_atom_set_voltage(rdev, rdev->pm.default_vddci,
1120                                                 SET_VOLTAGE_TYPE_ASIC_VDDCI);
1121                 if (rdev->pm.default_sclk)
1122                         radeon_set_engine_clock(rdev, rdev->pm.default_sclk);
1123                 if (rdev->pm.default_mclk)
1124                         radeon_set_memory_clock(rdev, rdev->pm.default_mclk);
1125         }
1126 }
1127
1128 void radeon_pm_resume(struct radeon_device *rdev)
1129 {
1130         if (rdev->pm.pm_method == PM_METHOD_DPM)
1131                 radeon_pm_resume_dpm(rdev);
1132         else
1133                 radeon_pm_resume_old(rdev);
1134 }
1135
1136 static int radeon_pm_init_old(struct radeon_device *rdev)
1137 {
1138         int ret;
1139
1140         rdev->pm.profile = PM_PROFILE_DEFAULT;
1141         rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
1142         rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
1143         rdev->pm.dynpm_can_upclock = true;
1144         rdev->pm.dynpm_can_downclock = true;
1145         rdev->pm.default_sclk = rdev->clock.default_sclk;
1146         rdev->pm.default_mclk = rdev->clock.default_mclk;
1147         rdev->pm.current_sclk = rdev->clock.default_sclk;
1148         rdev->pm.current_mclk = rdev->clock.default_mclk;
1149         rdev->pm.int_thermal_type = THERMAL_TYPE_NONE;
1150
1151         if (rdev->bios) {
1152                 if (rdev->is_atom_bios)
1153                         radeon_atombios_get_power_modes(rdev);
1154                 else
1155                         radeon_combios_get_power_modes(rdev);
1156                 radeon_pm_print_states(rdev);
1157                 radeon_pm_init_profile(rdev);
1158                 /* set up the default clocks if the MC ucode is loaded */
1159                 if ((rdev->family >= CHIP_BARTS) &&
1160                     (rdev->family <= CHIP_CAYMAN) &&
1161                     rdev->mc_fw) {
1162                         if (rdev->pm.default_vddc)
1163                                 radeon_atom_set_voltage(rdev, rdev->pm.default_vddc,
1164                                                         SET_VOLTAGE_TYPE_ASIC_VDDC);
1165                         if (rdev->pm.default_vddci)
1166                                 radeon_atom_set_voltage(rdev, rdev->pm.default_vddci,
1167                                                         SET_VOLTAGE_TYPE_ASIC_VDDCI);
1168                         if (rdev->pm.default_sclk)
1169                                 radeon_set_engine_clock(rdev, rdev->pm.default_sclk);
1170                         if (rdev->pm.default_mclk)
1171                                 radeon_set_memory_clock(rdev, rdev->pm.default_mclk);
1172                 }
1173         }
1174
1175         /* set up the internal thermal sensor if applicable */
1176         ret = radeon_hwmon_init(rdev);
1177         if (ret)
1178                 return ret;
1179
1180         INIT_DELAYED_WORK(&rdev->pm.dynpm_idle_work, radeon_dynpm_idle_work_handler);
1181
1182         if (rdev->pm.num_power_states > 1) {
1183                 /* where's the best place to put these? */
1184                 ret = device_create_file(rdev->dev, &dev_attr_power_profile);
1185                 if (ret)
1186                         DRM_ERROR("failed to create device file for power profile\n");
1187                 ret = device_create_file(rdev->dev, &dev_attr_power_method);
1188                 if (ret)
1189                         DRM_ERROR("failed to create device file for power method\n");
1190
1191                 if (radeon_debugfs_pm_init(rdev)) {
1192                         DRM_ERROR("Failed to register debugfs file for PM!\n");
1193                 }
1194
1195                 DRM_INFO("radeon: power management initialized\n");
1196         }
1197
1198         return 0;
1199 }
1200
1201 static void radeon_dpm_print_power_states(struct radeon_device *rdev)
1202 {
1203         int i;
1204
1205         for (i = 0; i < rdev->pm.dpm.num_ps; i++) {
1206                 printk("== power state %d ==\n", i);
1207                 radeon_dpm_print_power_state(rdev, &rdev->pm.dpm.ps[i]);
1208         }
1209 }
1210
1211 static int radeon_pm_init_dpm(struct radeon_device *rdev)
1212 {
1213         int ret;
1214
1215         /* default to balanced state */
1216         rdev->pm.dpm.state = POWER_STATE_TYPE_BALANCED;
1217         rdev->pm.dpm.user_state = POWER_STATE_TYPE_BALANCED;
1218         rdev->pm.dpm.forced_level = RADEON_DPM_FORCED_LEVEL_AUTO;
1219         rdev->pm.default_sclk = rdev->clock.default_sclk;
1220         rdev->pm.default_mclk = rdev->clock.default_mclk;
1221         rdev->pm.current_sclk = rdev->clock.default_sclk;
1222         rdev->pm.current_mclk = rdev->clock.default_mclk;
1223         rdev->pm.int_thermal_type = THERMAL_TYPE_NONE;
1224
1225         if (rdev->bios && rdev->is_atom_bios)
1226                 radeon_atombios_get_power_modes(rdev);
1227         else
1228                 return -EINVAL;
1229
1230         /* set up the internal thermal sensor if applicable */
1231         ret = radeon_hwmon_init(rdev);
1232         if (ret)
1233                 return ret;
1234
1235         INIT_WORK(&rdev->pm.dpm.thermal.work, radeon_dpm_thermal_work_handler);
1236         mutex_lock(&rdev->pm.mutex);
1237         radeon_dpm_init(rdev);
1238         rdev->pm.dpm.current_ps = rdev->pm.dpm.requested_ps = rdev->pm.dpm.boot_ps;
1239         if (radeon_dpm == 1)
1240                 radeon_dpm_print_power_states(rdev);
1241         radeon_dpm_setup_asic(rdev);
1242         ret = radeon_dpm_enable(rdev);
1243         mutex_unlock(&rdev->pm.mutex);
1244         if (ret)
1245                 goto dpm_failed;
1246         rdev->pm.dpm_enabled = true;
1247
1248         ret = device_create_file(rdev->dev, &dev_attr_power_dpm_state);
1249         if (ret)
1250                 DRM_ERROR("failed to create device file for dpm state\n");
1251         ret = device_create_file(rdev->dev, &dev_attr_power_dpm_force_performance_level);
1252         if (ret)
1253                 DRM_ERROR("failed to create device file for dpm state\n");
1254         /* XXX: these are noops for dpm but are here for backwards compat */
1255         ret = device_create_file(rdev->dev, &dev_attr_power_profile);
1256         if (ret)
1257                 DRM_ERROR("failed to create device file for power profile\n");
1258         ret = device_create_file(rdev->dev, &dev_attr_power_method);
1259         if (ret)
1260                 DRM_ERROR("failed to create device file for power method\n");
1261
1262         if (radeon_debugfs_pm_init(rdev)) {
1263                 DRM_ERROR("Failed to register debugfs file for dpm!\n");
1264         }
1265
1266         DRM_INFO("radeon: dpm initialized\n");
1267
1268         return 0;
1269
1270 dpm_failed:
1271         rdev->pm.dpm_enabled = false;
1272         if ((rdev->family >= CHIP_BARTS) &&
1273             (rdev->family <= CHIP_CAYMAN) &&
1274             rdev->mc_fw) {
1275                 if (rdev->pm.default_vddc)
1276                         radeon_atom_set_voltage(rdev, rdev->pm.default_vddc,
1277                                                 SET_VOLTAGE_TYPE_ASIC_VDDC);
1278                 if (rdev->pm.default_vddci)
1279                         radeon_atom_set_voltage(rdev, rdev->pm.default_vddci,
1280                                                 SET_VOLTAGE_TYPE_ASIC_VDDCI);
1281                 if (rdev->pm.default_sclk)
1282                         radeon_set_engine_clock(rdev, rdev->pm.default_sclk);
1283                 if (rdev->pm.default_mclk)
1284                         radeon_set_memory_clock(rdev, rdev->pm.default_mclk);
1285         }
1286         DRM_ERROR("radeon: dpm initialization failed\n");
1287         return ret;
1288 }
1289
1290 int radeon_pm_init(struct radeon_device *rdev)
1291 {
1292         /* enable dpm on rv6xx+ */
1293         switch (rdev->family) {
1294         case CHIP_RV610:
1295         case CHIP_RV630:
1296         case CHIP_RV620:
1297         case CHIP_RV635:
1298         case CHIP_RV670:
1299         case CHIP_RS780:
1300         case CHIP_RS880:
1301         case CHIP_RV770:
1302                 /* DPM requires the RLC, RV770+ dGPU requires SMC */
1303                 if (!rdev->rlc_fw)
1304                         rdev->pm.pm_method = PM_METHOD_PROFILE;
1305                 else if ((rdev->family >= CHIP_RV770) &&
1306                          (!(rdev->flags & RADEON_IS_IGP)) &&
1307                          (!rdev->smc_fw))
1308                         rdev->pm.pm_method = PM_METHOD_PROFILE;
1309                 else if (radeon_dpm == 1)
1310                         rdev->pm.pm_method = PM_METHOD_DPM;
1311                 else
1312                         rdev->pm.pm_method = PM_METHOD_PROFILE;
1313                 break;
1314         case CHIP_RV730:
1315         case CHIP_RV710:
1316         case CHIP_RV740:
1317         case CHIP_CEDAR:
1318         case CHIP_REDWOOD:
1319         case CHIP_JUNIPER:
1320         case CHIP_CYPRESS:
1321         case CHIP_HEMLOCK:
1322         case CHIP_PALM:
1323         case CHIP_SUMO:
1324         case CHIP_SUMO2:
1325         case CHIP_BARTS:
1326         case CHIP_TURKS:
1327         case CHIP_CAICOS:
1328         case CHIP_CAYMAN:
1329         case CHIP_ARUBA:
1330         case CHIP_TAHITI:
1331         case CHIP_PITCAIRN:
1332         case CHIP_VERDE:
1333         case CHIP_OLAND:
1334         case CHIP_HAINAN:
1335         case CHIP_BONAIRE:
1336         case CHIP_KABINI:
1337         case CHIP_KAVERI:
1338         case CHIP_HAWAII:
1339         case CHIP_MULLINS:
1340                 /* DPM requires the RLC, RV770+ dGPU requires SMC */
1341                 if (!rdev->rlc_fw)
1342                         rdev->pm.pm_method = PM_METHOD_PROFILE;
1343                 else if ((rdev->family >= CHIP_RV770) &&
1344                          (!(rdev->flags & RADEON_IS_IGP)) &&
1345                          (!rdev->smc_fw))
1346                         rdev->pm.pm_method = PM_METHOD_PROFILE;
1347                 else if (radeon_dpm == 0)
1348                         rdev->pm.pm_method = PM_METHOD_PROFILE;
1349                 else
1350                         rdev->pm.pm_method = PM_METHOD_DPM;
1351                 break;
1352         default:
1353                 /* default to profile method */
1354                 rdev->pm.pm_method = PM_METHOD_PROFILE;
1355                 break;
1356         }
1357
1358         if (rdev->pm.pm_method == PM_METHOD_DPM)
1359                 return radeon_pm_init_dpm(rdev);
1360         else
1361                 return radeon_pm_init_old(rdev);
1362 }
1363
1364 int radeon_pm_late_init(struct radeon_device *rdev)
1365 {
1366         int ret = 0;
1367
1368         if (rdev->pm.pm_method == PM_METHOD_DPM) {
1369                 mutex_lock(&rdev->pm.mutex);
1370                 ret = radeon_dpm_late_enable(rdev);
1371                 mutex_unlock(&rdev->pm.mutex);
1372         }
1373         return ret;
1374 }
1375
1376 static void radeon_pm_fini_old(struct radeon_device *rdev)
1377 {
1378         if (rdev->pm.num_power_states > 1) {
1379                 mutex_lock(&rdev->pm.mutex);
1380                 if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
1381                         rdev->pm.profile = PM_PROFILE_DEFAULT;
1382                         radeon_pm_update_profile(rdev);
1383                         radeon_pm_set_clocks(rdev);
1384                 } else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
1385                         /* reset default clocks */
1386                         rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
1387                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
1388                         radeon_pm_set_clocks(rdev);
1389                 }
1390                 mutex_unlock(&rdev->pm.mutex);
1391
1392                 cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
1393
1394                 device_remove_file(rdev->dev, &dev_attr_power_profile);
1395                 device_remove_file(rdev->dev, &dev_attr_power_method);
1396         }
1397
1398         radeon_hwmon_fini(rdev);
1399         kfree(rdev->pm.power_state);
1400 }
1401
1402 static void radeon_pm_fini_dpm(struct radeon_device *rdev)
1403 {
1404         if (rdev->pm.num_power_states > 1) {
1405                 mutex_lock(&rdev->pm.mutex);
1406                 radeon_dpm_disable(rdev);
1407                 mutex_unlock(&rdev->pm.mutex);
1408
1409                 device_remove_file(rdev->dev, &dev_attr_power_dpm_state);
1410                 device_remove_file(rdev->dev, &dev_attr_power_dpm_force_performance_level);
1411                 /* XXX backwards compat */
1412                 device_remove_file(rdev->dev, &dev_attr_power_profile);
1413                 device_remove_file(rdev->dev, &dev_attr_power_method);
1414         }
1415         radeon_dpm_fini(rdev);
1416
1417         radeon_hwmon_fini(rdev);
1418         kfree(rdev->pm.power_state);
1419 }
1420
1421 void radeon_pm_fini(struct radeon_device *rdev)
1422 {
1423         if (rdev->pm.pm_method == PM_METHOD_DPM)
1424                 radeon_pm_fini_dpm(rdev);
1425         else
1426                 radeon_pm_fini_old(rdev);
1427 }
1428
1429 static void radeon_pm_compute_clocks_old(struct radeon_device *rdev)
1430 {
1431         struct drm_device *ddev = rdev->ddev;
1432         struct drm_crtc *crtc;
1433         struct radeon_crtc *radeon_crtc;
1434
1435         if (rdev->pm.num_power_states < 2)
1436                 return;
1437
1438         mutex_lock(&rdev->pm.mutex);
1439
1440         rdev->pm.active_crtcs = 0;
1441         rdev->pm.active_crtc_count = 0;
1442         if (rdev->num_crtc && rdev->mode_info.mode_config_initialized) {
1443                 list_for_each_entry(crtc,
1444                                     &ddev->mode_config.crtc_list, head) {
1445                         radeon_crtc = to_radeon_crtc(crtc);
1446                         if (radeon_crtc->enabled) {
1447                                 rdev->pm.active_crtcs |= (1 << radeon_crtc->crtc_id);
1448                                 rdev->pm.active_crtc_count++;
1449                         }
1450                 }
1451         }
1452
1453         if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
1454                 radeon_pm_update_profile(rdev);
1455                 radeon_pm_set_clocks(rdev);
1456         } else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
1457                 if (rdev->pm.dynpm_state != DYNPM_STATE_DISABLED) {
1458                         if (rdev->pm.active_crtc_count > 1) {
1459                                 if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) {
1460                                         cancel_delayed_work(&rdev->pm.dynpm_idle_work);
1461
1462                                         rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;
1463                                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
1464                                         radeon_pm_get_dynpm_state(rdev);
1465                                         radeon_pm_set_clocks(rdev);
1466
1467                                         DRM_DEBUG_DRIVER("radeon: dynamic power management deactivated\n");
1468                                 }
1469                         } else if (rdev->pm.active_crtc_count == 1) {
1470                                 /* TODO: Increase clocks if needed for current mode */
1471
1472                                 if (rdev->pm.dynpm_state == DYNPM_STATE_MINIMUM) {
1473                                         rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
1474                                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_UPCLOCK;
1475                                         radeon_pm_get_dynpm_state(rdev);
1476                                         radeon_pm_set_clocks(rdev);
1477
1478                                         schedule_delayed_work(&rdev->pm.dynpm_idle_work,
1479                                                               msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
1480                                 } else if (rdev->pm.dynpm_state == DYNPM_STATE_PAUSED) {
1481                                         rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
1482                                         schedule_delayed_work(&rdev->pm.dynpm_idle_work,
1483                                                               msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
1484                                         DRM_DEBUG_DRIVER("radeon: dynamic power management activated\n");
1485                                 }
1486                         } else { /* count == 0 */
1487                                 if (rdev->pm.dynpm_state != DYNPM_STATE_MINIMUM) {
1488                                         cancel_delayed_work(&rdev->pm.dynpm_idle_work);
1489
1490                                         rdev->pm.dynpm_state = DYNPM_STATE_MINIMUM;
1491                                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_MINIMUM;
1492                                         radeon_pm_get_dynpm_state(rdev);
1493                                         radeon_pm_set_clocks(rdev);
1494                                 }
1495                         }
1496                 }
1497         }
1498
1499         mutex_unlock(&rdev->pm.mutex);
1500 }
1501
1502 static void radeon_pm_compute_clocks_dpm(struct radeon_device *rdev)
1503 {
1504         struct drm_device *ddev = rdev->ddev;
1505         struct drm_crtc *crtc;
1506         struct radeon_crtc *radeon_crtc;
1507
1508         if (!rdev->pm.dpm_enabled)
1509                 return;
1510
1511         mutex_lock(&rdev->pm.mutex);
1512
1513         /* update active crtc counts */
1514         rdev->pm.dpm.new_active_crtcs = 0;
1515         rdev->pm.dpm.new_active_crtc_count = 0;
1516         if (rdev->num_crtc && rdev->mode_info.mode_config_initialized) {
1517                 list_for_each_entry(crtc,
1518                                     &ddev->mode_config.crtc_list, head) {
1519                         radeon_crtc = to_radeon_crtc(crtc);
1520                         if (crtc->enabled) {
1521                                 rdev->pm.dpm.new_active_crtcs |= (1 << radeon_crtc->crtc_id);
1522                                 rdev->pm.dpm.new_active_crtc_count++;
1523                         }
1524                 }
1525         }
1526
1527         /* update battery/ac status */
1528         if (power_supply_is_system_supplied() > 0)
1529                 rdev->pm.dpm.ac_power = true;
1530         else
1531                 rdev->pm.dpm.ac_power = false;
1532
1533         radeon_dpm_change_power_state_locked(rdev);
1534
1535         mutex_unlock(&rdev->pm.mutex);
1536
1537 }
1538
1539 void radeon_pm_compute_clocks(struct radeon_device *rdev)
1540 {
1541         if (rdev->pm.pm_method == PM_METHOD_DPM)
1542                 radeon_pm_compute_clocks_dpm(rdev);
1543         else
1544                 radeon_pm_compute_clocks_old(rdev);
1545 }
1546
1547 static bool radeon_pm_in_vbl(struct radeon_device *rdev)
1548 {
1549         int  crtc, vpos, hpos, vbl_status;
1550         bool in_vbl = true;
1551
1552         /* Iterate over all active crtc's. All crtc's must be in vblank,
1553          * otherwise return in_vbl == false.
1554          */
1555         for (crtc = 0; (crtc < rdev->num_crtc) && in_vbl; crtc++) {
1556                 if (rdev->pm.active_crtcs & (1 << crtc)) {
1557                         vbl_status = radeon_get_crtc_scanoutpos(rdev->ddev, crtc, 0, &vpos, &hpos, NULL, NULL);
1558                         if ((vbl_status & DRM_SCANOUTPOS_VALID) &&
1559                             !(vbl_status & DRM_SCANOUTPOS_IN_VBLANK))
1560                                 in_vbl = false;
1561                 }
1562         }
1563
1564         return in_vbl;
1565 }
1566
1567 static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish)
1568 {
1569         u32 stat_crtc = 0;
1570         bool in_vbl = radeon_pm_in_vbl(rdev);
1571
1572         if (in_vbl == false)
1573                 DRM_DEBUG_DRIVER("not in vbl for pm change %08x at %s\n", stat_crtc,
1574                          finish ? "exit" : "entry");
1575         return in_vbl;
1576 }
1577
1578 static void radeon_dynpm_idle_work_handler(struct work_struct *work)
1579 {
1580         struct radeon_device *rdev;
1581         int resched;
1582         rdev = container_of(work, struct radeon_device,
1583                                 pm.dynpm_idle_work.work);
1584
1585         resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev);
1586         mutex_lock(&rdev->pm.mutex);
1587         if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) {
1588                 int not_processed = 0;
1589                 int i;
1590
1591                 for (i = 0; i < RADEON_NUM_RINGS; ++i) {
1592                         struct radeon_ring *ring = &rdev->ring[i];
1593
1594                         if (ring->ready) {
1595                                 not_processed += radeon_fence_count_emitted(rdev, i);
1596                                 if (not_processed >= 3)
1597                                         break;
1598                         }
1599                 }
1600
1601                 if (not_processed >= 3) { /* should upclock */
1602                         if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_DOWNCLOCK) {
1603                                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
1604                         } else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE &&
1605                                    rdev->pm.dynpm_can_upclock) {
1606                                 rdev->pm.dynpm_planned_action =
1607                                         DYNPM_ACTION_UPCLOCK;
1608                                 rdev->pm.dynpm_action_timeout = jiffies +
1609                                 msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
1610                         }
1611                 } else if (not_processed == 0) { /* should downclock */
1612                         if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_UPCLOCK) {
1613                                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
1614                         } else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE &&
1615                                    rdev->pm.dynpm_can_downclock) {
1616                                 rdev->pm.dynpm_planned_action =
1617                                         DYNPM_ACTION_DOWNCLOCK;
1618                                 rdev->pm.dynpm_action_timeout = jiffies +
1619                                 msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
1620                         }
1621                 }
1622
1623                 /* Note, radeon_pm_set_clocks is called with static_switch set
1624                  * to false since we want to wait for vbl to avoid flicker.
1625                  */
1626                 if (rdev->pm.dynpm_planned_action != DYNPM_ACTION_NONE &&
1627                     jiffies > rdev->pm.dynpm_action_timeout) {
1628                         radeon_pm_get_dynpm_state(rdev);
1629                         radeon_pm_set_clocks(rdev);
1630                 }
1631
1632                 schedule_delayed_work(&rdev->pm.dynpm_idle_work,
1633                                       msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
1634         }
1635         mutex_unlock(&rdev->pm.mutex);
1636         ttm_bo_unlock_delayed_workqueue(&rdev->mman.bdev, resched);
1637 }
1638
1639 /*
1640  * Debugfs info
1641  */
1642 #if defined(CONFIG_DEBUG_FS)
1643
1644 static int radeon_debugfs_pm_info(struct seq_file *m, void *data)
1645 {
1646         struct drm_info_node *node = (struct drm_info_node *) m->private;
1647         struct drm_device *dev = node->minor->dev;
1648         struct radeon_device *rdev = dev->dev_private;
1649         struct drm_device *ddev = rdev->ddev;
1650
1651         if  ((rdev->flags & RADEON_IS_PX) &&
1652              (ddev->switch_power_state != DRM_SWITCH_POWER_ON)) {
1653                 seq_printf(m, "PX asic powered off\n");
1654         } else if (rdev->pm.dpm_enabled) {
1655                 mutex_lock(&rdev->pm.mutex);
1656                 if (rdev->asic->dpm.debugfs_print_current_performance_level)
1657                         radeon_dpm_debugfs_print_current_performance_level(rdev, m);
1658                 else
1659                         seq_printf(m, "Debugfs support not implemented for this asic\n");
1660                 mutex_unlock(&rdev->pm.mutex);
1661         } else {
1662                 seq_printf(m, "default engine clock: %u0 kHz\n", rdev->pm.default_sclk);
1663                 /* radeon_get_engine_clock is not reliable on APUs so just print the current clock */
1664                 if ((rdev->family >= CHIP_PALM) && (rdev->flags & RADEON_IS_IGP))
1665                         seq_printf(m, "current engine clock: %u0 kHz\n", rdev->pm.current_sclk);
1666                 else
1667                         seq_printf(m, "current engine clock: %u0 kHz\n", radeon_get_engine_clock(rdev));
1668                 seq_printf(m, "default memory clock: %u0 kHz\n", rdev->pm.default_mclk);
1669                 if (rdev->asic->pm.get_memory_clock)
1670                         seq_printf(m, "current memory clock: %u0 kHz\n", radeon_get_memory_clock(rdev));
1671                 if (rdev->pm.current_vddc)
1672                         seq_printf(m, "voltage: %u mV\n", rdev->pm.current_vddc);
1673                 if (rdev->asic->pm.get_pcie_lanes)
1674                         seq_printf(m, "PCIE lanes: %d\n", radeon_get_pcie_lanes(rdev));
1675         }
1676
1677         return 0;
1678 }
1679
1680 static struct drm_info_list radeon_pm_info_list[] = {
1681         {"radeon_pm_info", radeon_debugfs_pm_info, 0, NULL},
1682 };
1683 #endif
1684
1685 static int radeon_debugfs_pm_init(struct radeon_device *rdev)
1686 {
1687 #if defined(CONFIG_DEBUG_FS)
1688         return radeon_debugfs_add_files(rdev, radeon_pm_info_list, ARRAY_SIZE(radeon_pm_info_list));
1689 #else
1690         return 0;
1691 #endif
1692 }