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_PROFILE) {
  71                 if (rdev->pm.profile == PM_PROFILE_AUTO) {
  72                         mutex_lock(&rdev->pm.mutex);
  73                         radeon_pm_update_profile(rdev);
  74                         radeon_pm_set_clocks(rdev);
  75                         mutex_unlock(&rdev->pm.mutex);
  76                 }
  77         }
  78 }
  79
  80 static void radeon_pm_update_profile(struct radeon_device *rdev)
  81 {
  82         switch (rdev->pm.profile) {
  83         case PM_PROFILE_DEFAULT:
  84                 rdev->pm.profile_index = PM_PROFILE_DEFAULT_IDX;
  85                 break;
  86         case PM_PROFILE_AUTO:
  87                 if (power_supply_is_system_supplied() > 0) {
  88                         if (rdev->pm.active_crtc_count > 1)
  89                                 rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;
  90                         else
  91                                 rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;
  92                 } else {
  93                         if (rdev->pm.active_crtc_count > 1)
  94                                 rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
  95                         else
  96                                 rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
  97                 }
  98                 break;
  99         case PM_PROFILE_LOW:
 100                 if (rdev->pm.active_crtc_count > 1)
 101                         rdev->pm.profile_index = PM_PROFILE_LOW_MH_IDX;
 102                 else
 103                         rdev->pm.profile_index = PM_PROFILE_LOW_SH_IDX;
 104                 break;
 105         case PM_PROFILE_MID:
 106                 if (rdev->pm.active_crtc_count > 1)
 107                         rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
 108                 else
 109                         rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
 110                 break;
 111         case PM_PROFILE_HIGH:
 112                 if (rdev->pm.active_crtc_count > 1)
 113                         rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;
 114                 else
 115                         rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;
 116                 break;
 117         }
 118
 119         if (rdev->pm.active_crtc_count == 0) {
 120                 rdev->pm.requested_power_state_index =
 121                         rdev->pm.profiles[rdev->pm.profile_index].dpms_off_ps_idx;
 122                 rdev->pm.requested_clock_mode_index =
 123                         rdev->pm.profiles[rdev->pm.profile_index].dpms_off_cm_idx;
 124         } else {
 125                 rdev->pm.requested_power_state_index =
 126                         rdev->pm.profiles[rdev->pm.profile_index].dpms_on_ps_idx;
 127                 rdev->pm.requested_clock_mode_index =
 128                         rdev->pm.profiles[rdev->pm.profile_index].dpms_on_cm_idx;
 129         }
 130 }
 131
 132 static void radeon_unmap_vram_bos(struct radeon_device *rdev)
 133 {
 134         struct radeon_bo *bo, *n;
 135
 136         if (list_empty(&rdev->gem.objects))
 137                 return;
 138
 139         list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
 140                 if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 141                         ttm_bo_unmap_virtual(&bo->tbo);
 142         }
 143 }
 144
 145 static void radeon_sync_with_vblank(struct radeon_device *rdev)
 146 {
 147         if (rdev->pm.active_crtcs) {
 148                 rdev->pm.vblank_sync = false;
 149                 wait_event_timeout(
 150                         rdev->irq.vblank_queue, rdev->pm.vblank_sync,
 151                         msecs_to_jiffies(RADEON_WAIT_VBLANK_TIMEOUT));
 152         }
 153 }
 154
 155 static void radeon_set_power_state(struct radeon_device *rdev)
 156 {
 157         u32 sclk, mclk;
 158         bool misc_after = false;
 159
 160         if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) &&
 161             (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index))
 162                 return;
 163
 164         if (radeon_gui_idle(rdev)) {
 165                 sclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
 166                         clock_info[rdev->pm.requested_clock_mode_index].sclk;
 167                 if (sclk > rdev->pm.default_sclk)
 168                         sclk = rdev->pm.default_sclk;
 169
 170                 /* starting with BTC, there is one state that is used for both
 171                  * MH and SH.  Difference is that we always use the high clock index for
 172                  * mclk.
 173                  */
 174                 if ((rdev->pm.pm_method == PM_METHOD_PROFILE) &&
 175                     (rdev->family >= CHIP_BARTS) &&
 176                     rdev->pm.active_crtc_count &&
 177                     ((rdev->pm.profile_index == PM_PROFILE_MID_MH_IDX) ||
 178                      (rdev->pm.profile_index == PM_PROFILE_LOW_MH_IDX)))
 179                         mclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
 180                                 clock_info[rdev->pm.profiles[PM_PROFILE_HIGH_MH_IDX].dpms_on_cm_idx].mclk;
 181                 else
 182                         mclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
 183                                 clock_info[rdev->pm.requested_clock_mode_index].mclk;
 184
 185                 if (mclk > rdev->pm.default_mclk)
 186                         mclk = rdev->pm.default_mclk;
 187
 188                 /* upvolt before raising clocks, downvolt after lowering clocks */
 189                 if (sclk < rdev->pm.current_sclk)
 190                         misc_after = true;
 191
 192                 radeon_sync_with_vblank(rdev);
 193
 194                 if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 195                         if (!radeon_pm_in_vbl(rdev))
 196                                 return;
 197                 }
 198
 199                 radeon_pm_prepare(rdev);
 200
 201                 if (!misc_after)
 202                         /* voltage, pcie lanes, etc.*/
 203                         radeon_pm_misc(rdev);
 204
 205                 /* set engine clock */
 206                 if (sclk != rdev->pm.current_sclk) {
 207                         radeon_pm_debug_check_in_vbl(rdev, false);
 208                         radeon_set_engine_clock(rdev, sclk);
 209                         radeon_pm_debug_check_in_vbl(rdev, true);
 210                         rdev->pm.current_sclk = sclk;
 211                         DRM_DEBUG_DRIVER("Setting: e: %d\n", sclk);
 212                 }
 213
 214                 /* set memory clock */
 215                 if (rdev->asic->pm.set_memory_clock && (mclk != rdev->pm.current_mclk)) {
 216                         radeon_pm_debug_check_in_vbl(rdev, false);
 217                         radeon_set_memory_clock(rdev, mclk);
 218                         radeon_pm_debug_check_in_vbl(rdev, true);
 219                         rdev->pm.current_mclk = mclk;
 220                         DRM_DEBUG_DRIVER("Setting: m: %d\n", mclk);
 221                 }
 222
 223                 if (misc_after)
 224                         /* voltage, pcie lanes, etc.*/
 225                         radeon_pm_misc(rdev);
 226
 227                 radeon_pm_finish(rdev);
 228
 229                 rdev->pm.current_power_state_index = rdev->pm.requested_power_state_index;
 230                 rdev->pm.current_clock_mode_index = rdev->pm.requested_clock_mode_index;
 231         } else
 232                 DRM_DEBUG_DRIVER("pm: GUI not idle!!!\n");
 233 }
 234
 235 static void radeon_pm_set_clocks(struct radeon_device *rdev)
 236 {
 237         int i, r;
 238
 239         /* no need to take locks, etc. if nothing's going to change */
 240         if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) &&
 241             (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index))
 242                 return;
 243
 244         mutex_lock(&rdev->ddev->struct_mutex);
 245         down_write(&rdev->pm.mclk_lock);
 246         mutex_lock(&rdev->ring_lock);
 247
 248         /* wait for the rings to drain */
 249         for (i = 0; i < RADEON_NUM_RINGS; i++) {
 250                 struct radeon_ring *ring = &rdev->ring[i];
 251                 if (!ring->ready) {
 252                         continue;
 253                 }
 254                 r = radeon_fence_wait_empty_locked(rdev, i);
 255                 if (r) {
 256                         /* needs a GPU reset dont reset here */
 257                         mutex_unlock(&rdev->ring_lock);
 258                         up_write(&rdev->pm.mclk_lock);
 259                         mutex_unlock(&rdev->ddev->struct_mutex);
 260                         return;
 261                 }
 262         }
 263
 264         radeon_unmap_vram_bos(rdev);
 265
 266         if (rdev->irq.installed) {
 267                 for (i = 0; i < rdev->num_crtc; i++) {
 268                         if (rdev->pm.active_crtcs & (1 << i)) {
 269                                 rdev->pm.req_vblank |= (1 << i);
 270                                 drm_vblank_get(rdev->ddev, i);
 271                         }
 272                 }
 273         }
 274
 275         radeon_set_power_state(rdev);
 276
 277         if (rdev->irq.installed) {
 278                 for (i = 0; i < rdev->num_crtc; i++) {
 279                         if (rdev->pm.req_vblank & (1 << i)) {
 280                                 rdev->pm.req_vblank &= ~(1 << i);
 281                                 drm_vblank_put(rdev->ddev, i);
 282                         }
 283                 }
 284         }
 285
 286         /* update display watermarks based on new power state */
 287         radeon_update_bandwidth_info(rdev);
 288         if (rdev->pm.active_crtc_count)
 289                 radeon_bandwidth_update(rdev);
 290
 291         rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 292
 293         mutex_unlock(&rdev->ring_lock);
 294         up_write(&rdev->pm.mclk_lock);
 295         mutex_unlock(&rdev->ddev->struct_mutex);
 296 }
 297
 298 static void radeon_pm_print_states(struct radeon_device *rdev)
 299 {
 300         int i, j;
 301         struct radeon_power_state *power_state;
 302         struct radeon_pm_clock_info *clock_info;
 303
 304         DRM_DEBUG_DRIVER("%d Power State(s)\n", rdev->pm.num_power_states);
 305         for (i = 0; i < rdev->pm.num_power_states; i++) {
 306                 power_state = &rdev->pm.power_state[i];
 307                 DRM_DEBUG_DRIVER("State %d: %s\n", i,
 308                         radeon_pm_state_type_name[power_state->type]);
 309                 if (i == rdev->pm.default_power_state_index)
 310                         DRM_DEBUG_DRIVER("\tDefault");
 311                 if ((rdev->flags & RADEON_IS_PCIE) && !(rdev->flags & RADEON_IS_IGP))
 312                         DRM_DEBUG_DRIVER("\t%d PCIE Lanes\n", power_state->pcie_lanes);
 313                 if (power_state->flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY)
 314                         DRM_DEBUG_DRIVER("\tSingle display only\n");
 315                 DRM_DEBUG_DRIVER("\t%d Clock Mode(s)\n", power_state->num_clock_modes);
 316                 for (j = 0; j < power_state->num_clock_modes; j++) {
 317                         clock_info = &(power_state->clock_info[j]);
 318                         if (rdev->flags & RADEON_IS_IGP)
 319                                 DRM_DEBUG_DRIVER("\t\t%d e: %d\n",
 320                                                  j,
 321                                                  clock_info->sclk * 10);
 322                         else
 323                                 DRM_DEBUG_DRIVER("\t\t%d e: %d\tm: %d\tv: %d\n",
 324                                                  j,
 325                                                  clock_info->sclk * 10,
 326                                                  clock_info->mclk * 10,
 327                                                  clock_info->voltage.voltage);
 328                 }
 329         }
 330 }
 331
 332 static ssize_t radeon_get_pm_profile(struct device *dev,
 333                                      struct device_attribute *attr,
 334                                      char *buf)
 335 {
 336         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 337         struct radeon_device *rdev = ddev->dev_private;
 338         int cp = rdev->pm.profile;
 339
 340         return snprintf(buf, PAGE_SIZE, "%s\n",
 341                         (cp == PM_PROFILE_AUTO) ? "auto" :
 342                         (cp == PM_PROFILE_LOW) ? "low" :
 343                         (cp == PM_PROFILE_MID) ? "mid" :
 344                         (cp == PM_PROFILE_HIGH) ? "high" : "default");
 345 }
 346
 347 static ssize_t radeon_set_pm_profile(struct device *dev,
 348                                      struct device_attribute *attr,
 349                                      const char *buf,
 350                                      size_t count)
 351 {
 352         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 353         struct radeon_device *rdev = ddev->dev_private;
 354
 355         mutex_lock(&rdev->pm.mutex);
 356         if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
 357                 if (strncmp("default", buf, strlen("default")) == 0)
 358                         rdev->pm.profile = PM_PROFILE_DEFAULT;
 359                 else if (strncmp("auto", buf, strlen("auto")) == 0)
 360                         rdev->pm.profile = PM_PROFILE_AUTO;
 361                 else if (strncmp("low", buf, strlen("low")) == 0)
 362                         rdev->pm.profile = PM_PROFILE_LOW;
 363                 else if (strncmp("mid", buf, strlen("mid")) == 0)
 364                         rdev->pm.profile = PM_PROFILE_MID;
 365                 else if (strncmp("high", buf, strlen("high")) == 0)
 366                         rdev->pm.profile = PM_PROFILE_HIGH;
 367                 else {
 368                         count = -EINVAL;
 369                         goto fail;
 370                 }
 371                 radeon_pm_update_profile(rdev);
 372                 radeon_pm_set_clocks(rdev);
 373         } else
 374                 count = -EINVAL;
 375
 376 fail:
 377         mutex_unlock(&rdev->pm.mutex);
 378
 379         return count;
 380 }
 381
 382 static ssize_t radeon_get_pm_method(struct device *dev,
 383                                     struct device_attribute *attr,
 384                                     char *buf)
 385 {
 386         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 387         struct radeon_device *rdev = ddev->dev_private;
 388         int pm = rdev->pm.pm_method;
 389
 390         return snprintf(buf, PAGE_SIZE, "%s\n",
 391                         (pm == PM_METHOD_DYNPM) ? "dynpm" : "profile");
 392 }
 393
 394 static ssize_t radeon_set_pm_method(struct device *dev,
 395                                     struct device_attribute *attr,
 396                                     const char *buf,
 397                                     size_t count)
 398 {
 399         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 400         struct radeon_device *rdev = ddev->dev_private;
 401
 402
 403         if (strncmp("dynpm", buf, strlen("dynpm")) == 0) {
 404                 mutex_lock(&rdev->pm.mutex);
 405                 rdev->pm.pm_method = PM_METHOD_DYNPM;
 406                 rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;
 407                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
 408                 mutex_unlock(&rdev->pm.mutex);
 409         } else if (strncmp("profile", buf, strlen("profile")) == 0) {
 410                 mutex_lock(&rdev->pm.mutex);
 411                 /* disable dynpm */
 412                 rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
 413                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 414                 rdev->pm.pm_method = PM_METHOD_PROFILE;
 415                 mutex_unlock(&rdev->pm.mutex);
 416                 cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
 417         } else {
 418                 count = -EINVAL;
 419                 goto fail;
 420         }
 421         radeon_pm_compute_clocks(rdev);
 422 fail:
 423         return count;
 424 }
 425
 426 static DEVICE_ATTR(power_profile, S_IRUGO | S_IWUSR, radeon_get_pm_profile, radeon_set_pm_profile);
 427 static DEVICE_ATTR(power_method, S_IRUGO | S_IWUSR, radeon_get_pm_method, radeon_set_pm_method);
 428
 429 static ssize_t radeon_hwmon_show_temp(struct device *dev,
 430                                       struct device_attribute *attr,
 431                                       char *buf)
 432 {
 433         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 434         struct radeon_device *rdev = ddev->dev_private;
 435         int temp;
 436
 437         switch (rdev->pm.int_thermal_type) {
 438         case THERMAL_TYPE_RV6XX:
 439                 temp = rv6xx_get_temp(rdev);
 440                 break;
 441         case THERMAL_TYPE_RV770:
 442                 temp = rv770_get_temp(rdev);
 443                 break;
 444         case THERMAL_TYPE_EVERGREEN:
 445         case THERMAL_TYPE_NI:
 446                 temp = evergreen_get_temp(rdev);
 447                 break;
 448         case THERMAL_TYPE_SUMO:
 449                 temp = sumo_get_temp(rdev);
 450                 break;
 451         case THERMAL_TYPE_SI:
 452                 temp = si_get_temp(rdev);
 453                 break;
 454         default:
 455                 temp = 0;
 456                 break;
 457         }
 458
 459         return snprintf(buf, PAGE_SIZE, "%d\n", temp);
 460 }
 461
 462 static ssize_t radeon_hwmon_show_name(struct device *dev,
 463                                       struct device_attribute *attr,
 464                                       char *buf)
 465 {
 466         return sprintf(buf, "radeon\n");
 467 }
 468
 469 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, radeon_hwmon_show_temp, NULL, 0);
 470 static SENSOR_DEVICE_ATTR(name, S_IRUGO, radeon_hwmon_show_name, NULL, 0);
 471
 472 static struct attribute *hwmon_attributes[] = {
 473         &sensor_dev_attr_temp1_input.dev_attr.attr,
 474         &sensor_dev_attr_name.dev_attr.attr,
 475         NULL
 476 };
 477
 478 static const struct attribute_group hwmon_attrgroup = {
 479         .attrs = hwmon_attributes,
 480 };
 481
 482 static int radeon_hwmon_init(struct radeon_device *rdev)
 483 {
 484         int err = 0;
 485
 486         rdev->pm.int_hwmon_dev = NULL;
 487
 488         switch (rdev->pm.int_thermal_type) {
 489         case THERMAL_TYPE_RV6XX:
 490         case THERMAL_TYPE_RV770:
 491         case THERMAL_TYPE_EVERGREEN:
 492         case THERMAL_TYPE_NI:
 493         case THERMAL_TYPE_SUMO:
 494         case THERMAL_TYPE_SI:
 495                 /* No support for TN yet */
 496                 if (rdev->family == CHIP_ARUBA)
 497                         return err;
 498                 rdev->pm.int_hwmon_dev = hwmon_device_register(rdev->dev);
 499                 if (IS_ERR(rdev->pm.int_hwmon_dev)) {
 500                         err = PTR_ERR(rdev->pm.int_hwmon_dev);
 501                         dev_err(rdev->dev,
 502                                 "Unable to register hwmon device: %d\n", err);
 503                         break;
 504                 }
 505                 dev_set_drvdata(rdev->pm.int_hwmon_dev, rdev->ddev);
 506                 err = sysfs_create_group(&rdev->pm.int_hwmon_dev->kobj,
 507                                          &hwmon_attrgroup);
 508                 if (err) {
 509                         dev_err(rdev->dev,
 510                                 "Unable to create hwmon sysfs file: %d\n", err);
 511                         hwmon_device_unregister(rdev->dev);
 512                 }
 513                 break;
 514         default:
 515                 break;
 516         }
 517
 518         return err;
 519 }
 520
 521 static void radeon_hwmon_fini(struct radeon_device *rdev)
 522 {
 523         if (rdev->pm.int_hwmon_dev) {
 524                 sysfs_remove_group(&rdev->pm.int_hwmon_dev->kobj, &hwmon_attrgroup);
 525                 hwmon_device_unregister(rdev->pm.int_hwmon_dev);
 526         }
 527 }
 528
 529 void radeon_pm_suspend(struct radeon_device *rdev)
 530 {
 531         mutex_lock(&rdev->pm.mutex);
 532         if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 533                 if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE)
 534                         rdev->pm.dynpm_state = DYNPM_STATE_SUSPENDED;
 535         }
 536         mutex_unlock(&rdev->pm.mutex);
 537
 538         cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
 539 }
 540
 541 void radeon_pm_resume(struct radeon_device *rdev)
 542 {
 543         /* set up the default clocks if the MC ucode is loaded */
 544         if ((rdev->family >= CHIP_BARTS) &&
 545             (rdev->family <= CHIP_CAYMAN) &&
 546             rdev->mc_fw) {
 547                 if (rdev->pm.default_vddc)
 548                         radeon_atom_set_voltage(rdev, rdev->pm.default_vddc,
 549                                                 SET_VOLTAGE_TYPE_ASIC_VDDC);
 550                 if (rdev->pm.default_vddci)
 551                         radeon_atom_set_voltage(rdev, rdev->pm.default_vddci,
 552                                                 SET_VOLTAGE_TYPE_ASIC_VDDCI);
 553                 if (rdev->pm.default_sclk)
 554                         radeon_set_engine_clock(rdev, rdev->pm.default_sclk);
 555                 if (rdev->pm.default_mclk)
 556                         radeon_set_memory_clock(rdev, rdev->pm.default_mclk);
 557         }
 558         /* asic init will reset the default power state */
 559         mutex_lock(&rdev->pm.mutex);
 560         rdev->pm.current_power_state_index = rdev->pm.default_power_state_index;
 561         rdev->pm.current_clock_mode_index = 0;
 562         rdev->pm.current_sclk = rdev->pm.default_sclk;
 563         rdev->pm.current_mclk = rdev->pm.default_mclk;
 564         rdev->pm.current_vddc = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage;
 565         rdev->pm.current_vddci = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.vddci;
 566         if (rdev->pm.pm_method == PM_METHOD_DYNPM
 567             && rdev->pm.dynpm_state == DYNPM_STATE_SUSPENDED) {
 568                 rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
 569                 schedule_delayed_work(&rdev->pm.dynpm_idle_work,
 570                                       msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 571         }
 572         mutex_unlock(&rdev->pm.mutex);
 573         radeon_pm_compute_clocks(rdev);
 574 }
 575
 576 int radeon_pm_init(struct radeon_device *rdev)
 577 {
 578         int ret;
 579
 580         /* default to profile method */
 581         rdev->pm.pm_method = PM_METHOD_PROFILE;
 582         rdev->pm.profile = PM_PROFILE_DEFAULT;
 583         rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
 584         rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 585         rdev->pm.dynpm_can_upclock = true;
 586         rdev->pm.dynpm_can_downclock = true;
 587         rdev->pm.default_sclk = rdev->clock.default_sclk;
 588         rdev->pm.default_mclk = rdev->clock.default_mclk;
 589         rdev->pm.current_sclk = rdev->clock.default_sclk;
 590         rdev->pm.current_mclk = rdev->clock.default_mclk;
 591         rdev->pm.int_thermal_type = THERMAL_TYPE_NONE;
 592
 593         if (rdev->bios) {
 594                 if (rdev->is_atom_bios)
 595                         radeon_atombios_get_power_modes(rdev);
 596                 else
 597                         radeon_combios_get_power_modes(rdev);
 598                 radeon_pm_print_states(rdev);
 599                 radeon_pm_init_profile(rdev);
 600                 /* set up the default clocks if the MC ucode is loaded */
 601                 if ((rdev->family >= CHIP_BARTS) &&
 602                     (rdev->family <= CHIP_CAYMAN) &&
 603                     rdev->mc_fw) {
 604                         if (rdev->pm.default_vddc)
 605                                 radeon_atom_set_voltage(rdev, rdev->pm.default_vddc,
 606                                                         SET_VOLTAGE_TYPE_ASIC_VDDC);
 607                         if (rdev->pm.default_vddci)
 608                                 radeon_atom_set_voltage(rdev, rdev->pm.default_vddci,
 609                                                         SET_VOLTAGE_TYPE_ASIC_VDDCI);
 610                         if (rdev->pm.default_sclk)
 611                                 radeon_set_engine_clock(rdev, rdev->pm.default_sclk);
 612                         if (rdev->pm.default_mclk)
 613                                 radeon_set_memory_clock(rdev, rdev->pm.default_mclk);
 614                 }
 615         }
 616
 617         /* set up the internal thermal sensor if applicable */
 618         ret = radeon_hwmon_init(rdev);
 619         if (ret)
 620                 return ret;
 621
 622         INIT_DELAYED_WORK(&rdev->pm.dynpm_idle_work, radeon_dynpm_idle_work_handler);
 623
 624         if (rdev->pm.num_power_states > 1) {
 625                 /* where's the best place to put these? */
 626                 ret = device_create_file(rdev->dev, &dev_attr_power_profile);
 627                 if (ret)
 628                         DRM_ERROR("failed to create device file for power profile\n");
 629                 ret = device_create_file(rdev->dev, &dev_attr_power_method);
 630                 if (ret)
 631                         DRM_ERROR("failed to create device file for power method\n");
 632
 633                 if (radeon_debugfs_pm_init(rdev)) {
 634                         DRM_ERROR("Failed to register debugfs file for PM!\n");
 635                 }
 636
 637                 DRM_INFO("radeon: power management initialized\n");
 638         }
 639
 640         return 0;
 641 }
 642
 643 void radeon_pm_fini(struct radeon_device *rdev)
 644 {
 645         if (rdev->pm.num_power_states > 1) {
 646                 mutex_lock(&rdev->pm.mutex);
 647                 if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
 648                         rdev->pm.profile = PM_PROFILE_DEFAULT;
 649                         radeon_pm_update_profile(rdev);
 650                         radeon_pm_set_clocks(rdev);
 651                 } else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 652                         /* reset default clocks */
 653                         rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
 654                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
 655                         radeon_pm_set_clocks(rdev);
 656                 }
 657                 mutex_unlock(&rdev->pm.mutex);
 658
 659                 cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
 660
 661                 device_remove_file(rdev->dev, &dev_attr_power_profile);
 662                 device_remove_file(rdev->dev, &dev_attr_power_method);
 663         }
 664
 665         if (rdev->pm.power_state)
 666                 kfree(rdev->pm.power_state);
 667
 668         radeon_hwmon_fini(rdev);
 669 }
 670
 671 void radeon_pm_compute_clocks(struct radeon_device *rdev)
 672 {
 673         struct drm_device *ddev = rdev->ddev;
 674         struct drm_crtc *crtc;
 675         struct radeon_crtc *radeon_crtc;
 676
 677         if (rdev->pm.num_power_states < 2)
 678                 return;
 679
 680         mutex_lock(&rdev->pm.mutex);
 681
 682         rdev->pm.active_crtcs = 0;
 683         rdev->pm.active_crtc_count = 0;
 684         list_for_each_entry(crtc,
 685                 &ddev->mode_config.crtc_list, head) {
 686                 radeon_crtc = to_radeon_crtc(crtc);
 687                 if (radeon_crtc->enabled) {
 688                         rdev->pm.active_crtcs |= (1 << radeon_crtc->crtc_id);
 689                         rdev->pm.active_crtc_count++;
 690                 }
 691         }
 692
 693         if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
 694                 radeon_pm_update_profile(rdev);
 695                 radeon_pm_set_clocks(rdev);
 696         } else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 697                 if (rdev->pm.dynpm_state != DYNPM_STATE_DISABLED) {
 698                         if (rdev->pm.active_crtc_count > 1) {
 699                                 if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) {
 700                                         cancel_delayed_work(&rdev->pm.dynpm_idle_work);
 701
 702                                         rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;
 703                                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
 704                                         radeon_pm_get_dynpm_state(rdev);
 705                                         radeon_pm_set_clocks(rdev);
 706
 707                                         DRM_DEBUG_DRIVER("radeon: dynamic power management deactivated\n");
 708                                 }
 709                         } else if (rdev->pm.active_crtc_count == 1) {
 710                                 /* TODO: Increase clocks if needed for current mode */
 711
 712                                 if (rdev->pm.dynpm_state == DYNPM_STATE_MINIMUM) {
 713                                         rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
 714                                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_UPCLOCK;
 715                                         radeon_pm_get_dynpm_state(rdev);
 716                                         radeon_pm_set_clocks(rdev);
 717
 718                                         schedule_delayed_work(&rdev->pm.dynpm_idle_work,
 719                                                               msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 720                                 } else if (rdev->pm.dynpm_state == DYNPM_STATE_PAUSED) {
 721                                         rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
 722                                         schedule_delayed_work(&rdev->pm.dynpm_idle_work,
 723                                                               msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 724                                         DRM_DEBUG_DRIVER("radeon: dynamic power management activated\n");
 725                                 }
 726                         } else { /* count == 0 */
 727                                 if (rdev->pm.dynpm_state != DYNPM_STATE_MINIMUM) {
 728                                         cancel_delayed_work(&rdev->pm.dynpm_idle_work);
 729
 730                                         rdev->pm.dynpm_state = DYNPM_STATE_MINIMUM;
 731                                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_MINIMUM;
 732                                         radeon_pm_get_dynpm_state(rdev);
 733                                         radeon_pm_set_clocks(rdev);
 734                                 }
 735                         }
 736                 }
 737         }
 738
 739         mutex_unlock(&rdev->pm.mutex);
 740 }
 741
 742 static bool radeon_pm_in_vbl(struct radeon_device *rdev)
 743 {
 744         int  crtc, vpos, hpos, vbl_status;
 745         bool in_vbl = true;
 746
 747         /* Iterate over all active crtc's. All crtc's must be in vblank,
 748          * otherwise return in_vbl == false.
 749          */
 750         for (crtc = 0; (crtc < rdev->num_crtc) && in_vbl; crtc++) {
 751                 if (rdev->pm.active_crtcs & (1 << crtc)) {
 752                         vbl_status = radeon_get_crtc_scanoutpos(rdev->ddev, crtc, &vpos, &hpos);
 753                         if ((vbl_status & DRM_SCANOUTPOS_VALID) &&
 754                             !(vbl_status & DRM_SCANOUTPOS_INVBL))
 755                                 in_vbl = false;
 756                 }
 757         }
 758
 759         return in_vbl;
 760 }
 761
 762 static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish)
 763 {
 764         u32 stat_crtc = 0;
 765         bool in_vbl = radeon_pm_in_vbl(rdev);
 766
 767         if (in_vbl == false)
 768                 DRM_DEBUG_DRIVER("not in vbl for pm change %08x at %s\n", stat_crtc,
 769                          finish ? "exit" : "entry");
 770         return in_vbl;
 771 }
 772
 773 static void radeon_dynpm_idle_work_handler(struct work_struct *work)
 774 {
 775         struct radeon_device *rdev;
 776         int resched;
 777         rdev = container_of(work, struct radeon_device,
 778                                 pm.dynpm_idle_work.work);
 779
 780         resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev);
 781         mutex_lock(&rdev->pm.mutex);
 782         if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) {
 783                 int not_processed = 0;
 784                 int i;
 785
 786                 for (i = 0; i < RADEON_NUM_RINGS; ++i) {
 787                         struct radeon_ring *ring = &rdev->ring[i];
 788
 789                         if (ring->ready) {
 790                                 not_processed += radeon_fence_count_emitted(rdev, i);
 791                                 if (not_processed >= 3)
 792                                         break;
 793                         }
 794                 }
 795
 796                 if (not_processed >= 3) { /* should upclock */
 797                         if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_DOWNCLOCK) {
 798                                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 799                         } else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE &&
 800                                    rdev->pm.dynpm_can_upclock) {
 801                                 rdev->pm.dynpm_planned_action =
 802                                         DYNPM_ACTION_UPCLOCK;
 803                                 rdev->pm.dynpm_action_timeout = jiffies +
 804                                 msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
 805                         }
 806                 } else if (not_processed == 0) { /* should downclock */
 807                         if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_UPCLOCK) {
 808                                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 809                         } else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE &&
 810                                    rdev->pm.dynpm_can_downclock) {
 811                                 rdev->pm.dynpm_planned_action =
 812                                         DYNPM_ACTION_DOWNCLOCK;
 813                                 rdev->pm.dynpm_action_timeout = jiffies +
 814                                 msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
 815                         }
 816                 }
 817
 818                 /* Note, radeon_pm_set_clocks is called with static_switch set
 819                  * to false since we want to wait for vbl to avoid flicker.
 820                  */
 821                 if (rdev->pm.dynpm_planned_action != DYNPM_ACTION_NONE &&
 822                     jiffies > rdev->pm.dynpm_action_timeout) {
 823                         radeon_pm_get_dynpm_state(rdev);
 824                         radeon_pm_set_clocks(rdev);
 825                 }
 826
 827                 schedule_delayed_work(&rdev->pm.dynpm_idle_work,
 828                                       msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 829         }
 830         mutex_unlock(&rdev->pm.mutex);
 831         ttm_bo_unlock_delayed_workqueue(&rdev->mman.bdev, resched);
 832 }
 833
 834 /*
 835  * Debugfs info
 836  */
 837 #if defined(CONFIG_DEBUG_FS)
 838
 839 static int radeon_debugfs_pm_info(struct seq_file *m, void *data)
 840 {
 841         struct drm_info_node *node = (struct drm_info_node *) m->private;
 842         struct drm_device *dev = node->minor->dev;
 843         struct radeon_device *rdev = dev->dev_private;
 844
 845         seq_printf(m, "default engine clock: %u0 kHz\n", rdev->pm.default_sclk);
 846         seq_printf(m, "current engine clock: %u0 kHz\n", radeon_get_engine_clock(rdev));
 847         seq_printf(m, "default memory clock: %u0 kHz\n", rdev->pm.default_mclk);
 848         if (rdev->asic->pm.get_memory_clock)
 849                 seq_printf(m, "current memory clock: %u0 kHz\n", radeon_get_memory_clock(rdev));
 850         if (rdev->pm.current_vddc)
 851                 seq_printf(m, "voltage: %u mV\n", rdev->pm.current_vddc);
 852         if (rdev->asic->pm.get_pcie_lanes)
 853                 seq_printf(m, "PCIE lanes: %d\n", radeon_get_pcie_lanes(rdev));
 854
 855         return 0;
 856 }
 857
 858 static struct drm_info_list radeon_pm_info_list[] = {
 859         {"radeon_pm_info", radeon_debugfs_pm_info, 0, NULL},
 860 };
 861 #endif
 862
 863 static int radeon_debugfs_pm_init(struct radeon_device *rdev)
 864 {
 865 #if defined(CONFIG_DEBUG_FS)
 866         return radeon_debugfs_add_files(rdev, radeon_pm_info_list, ARRAY_SIZE(radeon_pm_info_list));
 867 #else
 868         return 0;
 869 #endif
 870 }