drivers/gpu/drm/radeon/radeon_pm.c

   1 /*
   2  * Permission is hereby granted, free of charge, to any person obtaining a
   3  * copy of this software and associated documentation files (the "Software"),
   4  * to deal in the Software without restriction, including without limitation
   5  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   6  * and/or sell copies of the Software, and to permit persons to whom the
   7  * Software is furnished to do so, subject to the following conditions:
   8  *
   9  * The above copyright notice and this permission notice shall be included in
  10  * all copies or substantial portions of the Software.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  13  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  14  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  15  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  16  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  17  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  18  * OTHER DEALINGS IN THE SOFTWARE.
  19  *
  20  * Authors: Rafał Miłecki <zajec5@gmail.com>
  21  *          Alex Deucher <alexdeucher@gmail.com>
  22  */
  23 #include "drmP.h"
  24 #include "radeon.h"
  25 #include "avivod.h"
  26 #ifdef CONFIG_ACPI
  27 #include <linux/acpi.h>
  28 #endif
  29 #include <linux/power_supply.h>
  30 #include <linux/hwmon.h>
  31 #include <linux/hwmon-sysfs.h>
  32
  33 #define RADEON_IDLE_LOOP_MS 100
  34 #define RADEON_RECLOCK_DELAY_MS 200
  35 #define RADEON_WAIT_VBLANK_TIMEOUT 200
  36 #define RADEON_WAIT_IDLE_TIMEOUT 200
  37
  38 static const char *radeon_pm_state_type_name[5] = {
  39         "Default",
  40         "Powersave",
  41         "Battery",
  42         "Balanced",
  43         "Performance",
  44 };
  45
  46 static void radeon_dynpm_idle_work_handler(struct work_struct *work);
  47 static int radeon_debugfs_pm_init(struct radeon_device *rdev);
  48 static bool radeon_pm_in_vbl(struct radeon_device *rdev);
  49 static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish);
  50 static void radeon_pm_update_profile(struct radeon_device *rdev);
  51 static void radeon_pm_set_clocks(struct radeon_device *rdev);
  52
  53 #define ACPI_AC_CLASS           "ac_adapter"
  54
  55 #ifdef CONFIG_ACPI
  56 static int radeon_acpi_event(struct notifier_block *nb,
  57                              unsigned long val,
  58                              void *data)
  59 {
  60         struct radeon_device *rdev = container_of(nb, struct radeon_device, acpi_nb);
  61         struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
  62
  63         if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
  64                 if (power_supply_is_system_supplied() > 0)
  65                         DRM_DEBUG_DRIVER("pm: AC\n");
  66                 else
  67                         DRM_DEBUG_DRIVER("pm: DC\n");
  68
  69                 if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
  70                         if (rdev->pm.profile == PM_PROFILE_AUTO) {
  71                                 mutex_lock(&rdev->pm.mutex);
  72                                 radeon_pm_update_profile(rdev);
  73                                 radeon_pm_set_clocks(rdev);
  74                                 mutex_unlock(&rdev->pm.mutex);
  75                         }
  76                 }
  77         }
  78
  79         return NOTIFY_OK;
  80 }
  81 #endif
  82
  83 static void radeon_pm_update_profile(struct radeon_device *rdev)
  84 {
  85         switch (rdev->pm.profile) {
  86         case PM_PROFILE_DEFAULT:
  87                 rdev->pm.profile_index = PM_PROFILE_DEFAULT_IDX;
  88                 break;
  89         case PM_PROFILE_AUTO:
  90                 if (power_supply_is_system_supplied() > 0) {
  91                         if (rdev->pm.active_crtc_count > 1)
  92                                 rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;
  93                         else
  94                                 rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;
  95                 } else {
  96                         if (rdev->pm.active_crtc_count > 1)
  97                                 rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
  98                         else
  99                                 rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
 100                 }
 101                 break;
 102         case PM_PROFILE_LOW:
 103                 if (rdev->pm.active_crtc_count > 1)
 104                         rdev->pm.profile_index = PM_PROFILE_LOW_MH_IDX;
 105                 else
 106                         rdev->pm.profile_index = PM_PROFILE_LOW_SH_IDX;
 107                 break;
 108         case PM_PROFILE_MID:
 109                 if (rdev->pm.active_crtc_count > 1)
 110                         rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
 111                 else
 112                         rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
 113                 break;
 114         case PM_PROFILE_HIGH:
 115                 if (rdev->pm.active_crtc_count > 1)
 116                         rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;
 117                 else
 118                         rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;
 119                 break;
 120         }
 121
 122         if (rdev->pm.active_crtc_count == 0) {
 123                 rdev->pm.requested_power_state_index =
 124                         rdev->pm.profiles[rdev->pm.profile_index].dpms_off_ps_idx;
 125                 rdev->pm.requested_clock_mode_index =
 126                         rdev->pm.profiles[rdev->pm.profile_index].dpms_off_cm_idx;
 127         } else {
 128                 rdev->pm.requested_power_state_index =
 129                         rdev->pm.profiles[rdev->pm.profile_index].dpms_on_ps_idx;
 130                 rdev->pm.requested_clock_mode_index =
 131                         rdev->pm.profiles[rdev->pm.profile_index].dpms_on_cm_idx;
 132         }
 133 }
 134
 135 static void radeon_unmap_vram_bos(struct radeon_device *rdev)
 136 {
 137         struct radeon_bo *bo, *n;
 138
 139         if (list_empty(&rdev->gem.objects))
 140                 return;
 141
 142         list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
 143                 if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
 144                         ttm_bo_unmap_virtual(&bo->tbo);
 145         }
 146 }
 147
 148 static void radeon_sync_with_vblank(struct radeon_device *rdev)
 149 {
 150         if (rdev->pm.active_crtcs) {
 151                 rdev->pm.vblank_sync = false;
 152                 wait_event_timeout(
 153                         rdev->irq.vblank_queue, rdev->pm.vblank_sync,
 154                         msecs_to_jiffies(RADEON_WAIT_VBLANK_TIMEOUT));
 155         }
 156 }
 157
 158 static void radeon_set_power_state(struct radeon_device *rdev)
 159 {
 160         u32 sclk, mclk;
 161         bool misc_after = false;
 162
 163         if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) &&
 164             (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index))
 165                 return;
 166
 167         if (radeon_gui_idle(rdev)) {
 168                 sclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
 169                         clock_info[rdev->pm.requested_clock_mode_index].sclk;
 170                 if (sclk > rdev->clock.default_sclk)
 171                         sclk = rdev->clock.default_sclk;
 172
 173                 mclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
 174                         clock_info[rdev->pm.requested_clock_mode_index].mclk;
 175                 if (mclk > rdev->clock.default_mclk)
 176                         mclk = rdev->clock.default_mclk;
 177
 178                 /* upvolt before raising clocks, downvolt after lowering clocks */
 179                 if (sclk < rdev->pm.current_sclk)
 180                         misc_after = true;
 181
 182                 radeon_sync_with_vblank(rdev);
 183
 184                 if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 185                         if (!radeon_pm_in_vbl(rdev))
 186                                 return;
 187                 }
 188
 189                 radeon_pm_prepare(rdev);
 190
 191                 if (!misc_after)
 192                         /* voltage, pcie lanes, etc.*/
 193                         radeon_pm_misc(rdev);
 194
 195                 /* set engine clock */
 196                 if (sclk != rdev->pm.current_sclk) {
 197                         radeon_pm_debug_check_in_vbl(rdev, false);
 198                         radeon_set_engine_clock(rdev, sclk);
 199                         radeon_pm_debug_check_in_vbl(rdev, true);
 200                         rdev->pm.current_sclk = sclk;
 201                         DRM_DEBUG_DRIVER("Setting: e: %d\n", sclk);
 202                 }
 203
 204                 /* set memory clock */
 205                 if (rdev->asic->set_memory_clock && (mclk != rdev->pm.current_mclk)) {
 206                         radeon_pm_debug_check_in_vbl(rdev, false);
 207                         radeon_set_memory_clock(rdev, mclk);
 208                         radeon_pm_debug_check_in_vbl(rdev, true);
 209                         rdev->pm.current_mclk = mclk;
 210                         DRM_DEBUG_DRIVER("Setting: m: %d\n", mclk);
 211                 }
 212
 213                 if (misc_after)
 214                         /* voltage, pcie lanes, etc.*/
 215                         radeon_pm_misc(rdev);
 216
 217                 radeon_pm_finish(rdev);
 218
 219                 rdev->pm.current_power_state_index = rdev->pm.requested_power_state_index;
 220                 rdev->pm.current_clock_mode_index = rdev->pm.requested_clock_mode_index;
 221         } else
 222                 DRM_DEBUG_DRIVER("pm: GUI not idle!!!\n");
 223 }
 224
 225 static void radeon_pm_set_clocks(struct radeon_device *rdev)
 226 {
 227         int i;
 228
 229         /* no need to take locks, etc. if nothing's going to change */
 230         if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) &&
 231             (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index))
 232                 return;
 233
 234         mutex_lock(&rdev->ddev->struct_mutex);
 235         mutex_lock(&rdev->vram_mutex);
 236         mutex_lock(&rdev->cp.mutex);
 237
 238         /* gui idle int has issues on older chips it seems */
 239         if (rdev->family >= CHIP_R600) {
 240                 if (rdev->irq.installed) {
 241                         /* wait for GPU idle */
 242                         rdev->pm.gui_idle = false;
 243                         rdev->irq.gui_idle = true;
 244                         radeon_irq_set(rdev);
 245                         wait_event_interruptible_timeout(
 246                                 rdev->irq.idle_queue, rdev->pm.gui_idle,
 247                                 msecs_to_jiffies(RADEON_WAIT_IDLE_TIMEOUT));
 248                         rdev->irq.gui_idle = false;
 249                         radeon_irq_set(rdev);
 250                 }
 251         } else {
 252                 if (rdev->cp.ready) {
 253                         struct radeon_fence *fence;
 254                         radeon_ring_alloc(rdev, 64);
 255                         radeon_fence_create(rdev, &fence);
 256                         radeon_fence_emit(rdev, fence);
 257                         radeon_ring_commit(rdev);
 258                         radeon_fence_wait(fence, false);
 259                         radeon_fence_unref(&fence);
 260                 }
 261         }
 262         radeon_unmap_vram_bos(rdev);
 263
 264         if (rdev->irq.installed) {
 265                 for (i = 0; i < rdev->num_crtc; i++) {
 266                         if (rdev->pm.active_crtcs & (1 << i)) {
 267                                 rdev->pm.req_vblank |= (1 << i);
 268                                 drm_vblank_get(rdev->ddev, i);
 269                         }
 270                 }
 271         }
 272
 273         radeon_set_power_state(rdev);
 274
 275         if (rdev->irq.installed) {
 276                 for (i = 0; i < rdev->num_crtc; i++) {
 277                         if (rdev->pm.req_vblank & (1 << i)) {
 278                                 rdev->pm.req_vblank &= ~(1 << i);
 279                                 drm_vblank_put(rdev->ddev, i);
 280                         }
 281                 }
 282         }
 283
 284         /* update display watermarks based on new power state */
 285         radeon_update_bandwidth_info(rdev);
 286         if (rdev->pm.active_crtc_count)
 287                 radeon_bandwidth_update(rdev);
 288
 289         rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 290
 291         mutex_unlock(&rdev->cp.mutex);
 292         mutex_unlock(&rdev->vram_mutex);
 293         mutex_unlock(&rdev->ddev->struct_mutex);
 294 }
 295
 296 static void radeon_pm_print_states(struct radeon_device *rdev)
 297 {
 298         int i, j;
 299         struct radeon_power_state *power_state;
 300         struct radeon_pm_clock_info *clock_info;
 301
 302         DRM_DEBUG_DRIVER("%d Power State(s)\n", rdev->pm.num_power_states);
 303         for (i = 0; i < rdev->pm.num_power_states; i++) {
 304                 power_state = &rdev->pm.power_state[i];
 305                 DRM_DEBUG_DRIVER("State %d: %s\n", i,
 306                         radeon_pm_state_type_name[power_state->type]);
 307                 if (i == rdev->pm.default_power_state_index)
 308                         DRM_DEBUG_DRIVER("\tDefault");
 309                 if ((rdev->flags & RADEON_IS_PCIE) && !(rdev->flags & RADEON_IS_IGP))
 310                         DRM_DEBUG_DRIVER("\t%d PCIE Lanes\n", power_state->pcie_lanes);
 311                 if (power_state->flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY)
 312                         DRM_DEBUG_DRIVER("\tSingle display only\n");
 313                 DRM_DEBUG_DRIVER("\t%d Clock Mode(s)\n", power_state->num_clock_modes);
 314                 for (j = 0; j < power_state->num_clock_modes; j++) {
 315                         clock_info = &(power_state->clock_info[j]);
 316                         if (rdev->flags & RADEON_IS_IGP)
 317                                 DRM_DEBUG_DRIVER("\t\t%d e: %d%s\n",
 318                                         j,
 319                                         clock_info->sclk * 10,
 320                                         clock_info->flags & RADEON_PM_MODE_NO_DISPLAY ? "\tNo display only" : "");
 321                         else
 322                                 DRM_DEBUG_DRIVER("\t\t%d e: %d\tm: %d\tv: %d%s\n",
 323                                         j,
 324                                         clock_info->sclk * 10,
 325                                         clock_info->mclk * 10,
 326                                         clock_info->voltage.voltage,
 327                                         clock_info->flags & RADEON_PM_MODE_NO_DISPLAY ? "\tNo display only" : "");
 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                         DRM_ERROR("invalid power profile!\n");
 369                         goto fail;
 370                 }
 371                 radeon_pm_update_profile(rdev);
 372                 radeon_pm_set_clocks(rdev);
 373         }
 374 fail:
 375         mutex_unlock(&rdev->pm.mutex);
 376
 377         return count;
 378 }
 379
 380 static ssize_t radeon_get_pm_method(struct device *dev,
 381                                     struct device_attribute *attr,
 382                                     char *buf)
 383 {
 384         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 385         struct radeon_device *rdev = ddev->dev_private;
 386         int pm = rdev->pm.pm_method;
 387
 388         return snprintf(buf, PAGE_SIZE, "%s\n",
 389                         (pm == PM_METHOD_DYNPM) ? "dynpm" : "profile");
 390 }
 391
 392 static ssize_t radeon_set_pm_method(struct device *dev,
 393                                     struct device_attribute *attr,
 394                                     const char *buf,
 395                                     size_t count)
 396 {
 397         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 398         struct radeon_device *rdev = ddev->dev_private;
 399
 400
 401         if (strncmp("dynpm", buf, strlen("dynpm")) == 0) {
 402                 mutex_lock(&rdev->pm.mutex);
 403                 rdev->pm.pm_method = PM_METHOD_DYNPM;
 404                 rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;
 405                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
 406                 mutex_unlock(&rdev->pm.mutex);
 407         } else if (strncmp("profile", buf, strlen("profile")) == 0) {
 408                 bool flush_wq = false;
 409
 410                 mutex_lock(&rdev->pm.mutex);
 411                 if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 412                         cancel_delayed_work(&rdev->pm.dynpm_idle_work);
 413                         flush_wq = true;
 414                 }
 415                 /* disable dynpm */
 416                 rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
 417                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 418                 rdev->pm.pm_method = PM_METHOD_PROFILE;
 419                 mutex_unlock(&rdev->pm.mutex);
 420                 if (flush_wq)
 421                         flush_workqueue(rdev->wq);
 422         } else {
 423                 DRM_ERROR("invalid power method!\n");
 424                 goto fail;
 425         }
 426         radeon_pm_compute_clocks(rdev);
 427 fail:
 428         return count;
 429 }
 430
 431 static DEVICE_ATTR(power_profile, S_IRUGO | S_IWUSR, radeon_get_pm_profile, radeon_set_pm_profile);
 432 static DEVICE_ATTR(power_method, S_IRUGO | S_IWUSR, radeon_get_pm_method, radeon_set_pm_method);
 433
 434 static ssize_t radeon_hwmon_show_temp(struct device *dev,
 435                                       struct device_attribute *attr,
 436                                       char *buf)
 437 {
 438         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 439         struct radeon_device *rdev = ddev->dev_private;
 440         u32 temp;
 441
 442         switch (rdev->pm.int_thermal_type) {
 443         case THERMAL_TYPE_RV6XX:
 444                 temp = rv6xx_get_temp(rdev);
 445                 break;
 446         case THERMAL_TYPE_RV770:
 447                 temp = rv770_get_temp(rdev);
 448                 break;
 449         case THERMAL_TYPE_EVERGREEN:
 450                 temp = evergreen_get_temp(rdev);
 451                 break;
 452         default:
 453                 temp = 0;
 454                 break;
 455         }
 456
 457         return snprintf(buf, PAGE_SIZE, "%d\n", temp);
 458 }
 459
 460 static ssize_t radeon_hwmon_show_name(struct device *dev,
 461                                       struct device_attribute *attr,
 462                                       char *buf)
 463 {
 464         return sprintf(buf, "radeon\n");
 465 }
 466
 467 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, radeon_hwmon_show_temp, NULL, 0);
 468 static SENSOR_DEVICE_ATTR(name, S_IRUGO, radeon_hwmon_show_name, NULL, 0);
 469
 470 static struct attribute *hwmon_attributes[] = {
 471         &sensor_dev_attr_temp1_input.dev_attr.attr,
 472         &sensor_dev_attr_name.dev_attr.attr,
 473         NULL
 474 };
 475
 476 static const struct attribute_group hwmon_attrgroup = {
 477         .attrs = hwmon_attributes,
 478 };
 479
 480 static int radeon_hwmon_init(struct radeon_device *rdev)
 481 {
 482         int err = 0;
 483
 484         rdev->pm.int_hwmon_dev = NULL;
 485
 486         switch (rdev->pm.int_thermal_type) {
 487         case THERMAL_TYPE_RV6XX:
 488         case THERMAL_TYPE_RV770:
 489         case THERMAL_TYPE_EVERGREEN:
 490                 rdev->pm.int_hwmon_dev = hwmon_device_register(rdev->dev);
 491                 if (IS_ERR(rdev->pm.int_hwmon_dev)) {
 492                         err = PTR_ERR(rdev->pm.int_hwmon_dev);
 493                         dev_err(rdev->dev,
 494                                 "Unable to register hwmon device: %d\n", err);
 495                         break;
 496                 }
 497                 dev_set_drvdata(rdev->pm.int_hwmon_dev, rdev->ddev);
 498                 err = sysfs_create_group(&rdev->pm.int_hwmon_dev->kobj,
 499                                          &hwmon_attrgroup);
 500                 if (err) {
 501                         dev_err(rdev->dev,
 502                                 "Unable to create hwmon sysfs file: %d\n", err);
 503                         hwmon_device_unregister(rdev->dev);
 504                 }
 505                 break;
 506         default:
 507                 break;
 508         }
 509
 510         return err;
 511 }
 512
 513 static void radeon_hwmon_fini(struct radeon_device *rdev)
 514 {
 515         if (rdev->pm.int_hwmon_dev) {
 516                 sysfs_remove_group(&rdev->pm.int_hwmon_dev->kobj, &hwmon_attrgroup);
 517                 hwmon_device_unregister(rdev->pm.int_hwmon_dev);
 518         }
 519 }
 520
 521 void radeon_pm_suspend(struct radeon_device *rdev)
 522 {
 523         bool flush_wq = false;
 524
 525         mutex_lock(&rdev->pm.mutex);
 526         if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 527                 cancel_delayed_work(&rdev->pm.dynpm_idle_work);
 528                 if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE)
 529                         rdev->pm.dynpm_state = DYNPM_STATE_SUSPENDED;
 530                 flush_wq = true;
 531         }
 532         mutex_unlock(&rdev->pm.mutex);
 533         if (flush_wq)
 534                 flush_workqueue(rdev->wq);
 535 }
 536
 537 void radeon_pm_resume(struct radeon_device *rdev)
 538 {
 539         /* asic init will reset the default power state */
 540         mutex_lock(&rdev->pm.mutex);
 541         rdev->pm.current_power_state_index = rdev->pm.default_power_state_index;
 542         rdev->pm.current_clock_mode_index = 0;
 543         rdev->pm.current_sclk = rdev->clock.default_sclk;
 544         rdev->pm.current_mclk = rdev->clock.default_mclk;
 545         rdev->pm.current_vddc = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage;
 546         if (rdev->pm.pm_method == PM_METHOD_DYNPM
 547             && rdev->pm.dynpm_state == DYNPM_STATE_SUSPENDED) {
 548                 rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
 549                 queue_delayed_work(rdev->wq, &rdev->pm.dynpm_idle_work,
 550                                         msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 551         }
 552         mutex_unlock(&rdev->pm.mutex);
 553         radeon_pm_compute_clocks(rdev);
 554 }
 555
 556 int radeon_pm_init(struct radeon_device *rdev)
 557 {
 558         int ret;
 559
 560         /* default to profile method */
 561         rdev->pm.pm_method = PM_METHOD_PROFILE;
 562         rdev->pm.profile = PM_PROFILE_DEFAULT;
 563         rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
 564         rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 565         rdev->pm.dynpm_can_upclock = true;
 566         rdev->pm.dynpm_can_downclock = true;
 567         rdev->pm.current_sclk = rdev->clock.default_sclk;
 568         rdev->pm.current_mclk = rdev->clock.default_mclk;
 569         rdev->pm.int_thermal_type = THERMAL_TYPE_NONE;
 570
 571         if (rdev->bios) {
 572                 if (rdev->is_atom_bios)
 573                         radeon_atombios_get_power_modes(rdev);
 574                 else
 575                         radeon_combios_get_power_modes(rdev);
 576                 radeon_pm_print_states(rdev);
 577                 radeon_pm_init_profile(rdev);
 578         }
 579
 580         /* set up the internal thermal sensor if applicable */
 581         ret = radeon_hwmon_init(rdev);
 582         if (ret)
 583                 return ret;
 584         if (rdev->pm.num_power_states > 1) {
 585                 /* where's the best place to put these? */
 586                 ret = device_create_file(rdev->dev, &dev_attr_power_profile);
 587                 if (ret)
 588                         DRM_ERROR("failed to create device file for power profile\n");
 589                 ret = device_create_file(rdev->dev, &dev_attr_power_method);
 590                 if (ret)
 591                         DRM_ERROR("failed to create device file for power method\n");
 592
 593 #ifdef CONFIG_ACPI
 594                 rdev->acpi_nb.notifier_call = radeon_acpi_event;
 595                 register_acpi_notifier(&rdev->acpi_nb);
 596 #endif
 597                 INIT_DELAYED_WORK(&rdev->pm.dynpm_idle_work, radeon_dynpm_idle_work_handler);
 598
 599                 if (radeon_debugfs_pm_init(rdev)) {
 600                         DRM_ERROR("Failed to register debugfs file for PM!\n");
 601                 }
 602
 603                 DRM_INFO("radeon: power management initialized\n");
 604         }
 605
 606         return 0;
 607 }
 608
 609 void radeon_pm_fini(struct radeon_device *rdev)
 610 {
 611         if (rdev->pm.num_power_states > 1) {
 612                 bool flush_wq = false;
 613
 614                 mutex_lock(&rdev->pm.mutex);
 615                 if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
 616                         rdev->pm.profile = PM_PROFILE_DEFAULT;
 617                         radeon_pm_update_profile(rdev);
 618                         radeon_pm_set_clocks(rdev);
 619                 } else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 620                         /* cancel work */
 621                         cancel_delayed_work(&rdev->pm.dynpm_idle_work);
 622                         flush_wq = true;
 623                         /* reset default clocks */
 624                         rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
 625                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
 626                         radeon_pm_set_clocks(rdev);
 627                 }
 628                 mutex_unlock(&rdev->pm.mutex);
 629                 if (flush_wq)
 630                         flush_workqueue(rdev->wq);
 631
 632                 device_remove_file(rdev->dev, &dev_attr_power_profile);
 633                 device_remove_file(rdev->dev, &dev_attr_power_method);
 634 #ifdef CONFIG_ACPI
 635                 unregister_acpi_notifier(&rdev->acpi_nb);
 636 #endif
 637         }
 638
 639         radeon_hwmon_fini(rdev);
 640 }
 641
 642 void radeon_pm_compute_clocks(struct radeon_device *rdev)
 643 {
 644         struct drm_device *ddev = rdev->ddev;
 645         struct drm_crtc *crtc;
 646         struct radeon_crtc *radeon_crtc;
 647
 648         if (rdev->pm.num_power_states < 2)
 649                 return;
 650
 651         mutex_lock(&rdev->pm.mutex);
 652
 653         rdev->pm.active_crtcs = 0;
 654         rdev->pm.active_crtc_count = 0;
 655         list_for_each_entry(crtc,
 656                 &ddev->mode_config.crtc_list, head) {
 657                 radeon_crtc = to_radeon_crtc(crtc);
 658                 if (radeon_crtc->enabled) {
 659                         rdev->pm.active_crtcs |= (1 << radeon_crtc->crtc_id);
 660                         rdev->pm.active_crtc_count++;
 661                 }
 662         }
 663
 664         if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
 665                 radeon_pm_update_profile(rdev);
 666                 radeon_pm_set_clocks(rdev);
 667         } else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
 668                 if (rdev->pm.dynpm_state != DYNPM_STATE_DISABLED) {
 669                         if (rdev->pm.active_crtc_count > 1) {
 670                                 if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) {
 671                                         cancel_delayed_work(&rdev->pm.dynpm_idle_work);
 672
 673                                         rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;
 674                                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
 675                                         radeon_pm_get_dynpm_state(rdev);
 676                                         radeon_pm_set_clocks(rdev);
 677
 678                                         DRM_DEBUG_DRIVER("radeon: dynamic power management deactivated\n");
 679                                 }
 680                         } else if (rdev->pm.active_crtc_count == 1) {
 681                                 /* TODO: Increase clocks if needed for current mode */
 682
 683                                 if (rdev->pm.dynpm_state == DYNPM_STATE_MINIMUM) {
 684                                         rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
 685                                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_UPCLOCK;
 686                                         radeon_pm_get_dynpm_state(rdev);
 687                                         radeon_pm_set_clocks(rdev);
 688
 689                                         queue_delayed_work(rdev->wq, &rdev->pm.dynpm_idle_work,
 690                                                            msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 691                                 } else if (rdev->pm.dynpm_state == DYNPM_STATE_PAUSED) {
 692                                         rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
 693                                         queue_delayed_work(rdev->wq, &rdev->pm.dynpm_idle_work,
 694                                                            msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 695                                         DRM_DEBUG_DRIVER("radeon: dynamic power management activated\n");
 696                                 }
 697                         } else { /* count == 0 */
 698                                 if (rdev->pm.dynpm_state != DYNPM_STATE_MINIMUM) {
 699                                         cancel_delayed_work(&rdev->pm.dynpm_idle_work);
 700
 701                                         rdev->pm.dynpm_state = DYNPM_STATE_MINIMUM;
 702                                         rdev->pm.dynpm_planned_action = DYNPM_ACTION_MINIMUM;
 703                                         radeon_pm_get_dynpm_state(rdev);
 704                                         radeon_pm_set_clocks(rdev);
 705                                 }
 706                         }
 707                 }
 708         }
 709
 710         mutex_unlock(&rdev->pm.mutex);
 711 }
 712
 713 static bool radeon_pm_in_vbl(struct radeon_device *rdev)
 714 {
 715         int  crtc, vpos, hpos, vbl_status;
 716         bool in_vbl = true;
 717
 718         /* Iterate over all active crtc's. All crtc's must be in vblank,
 719          * otherwise return in_vbl == false.
 720          */
 721         for (crtc = 0; (crtc < rdev->num_crtc) && in_vbl; crtc++) {
 722                 if (rdev->pm.active_crtcs & (1 << crtc)) {
 723                         vbl_status = radeon_get_crtc_scanoutpos(rdev, crtc, &vpos, &hpos);
 724                         if ((vbl_status & RADEON_SCANOUTPOS_VALID) &&
 725                             !(vbl_status & RADEON_SCANOUTPOS_INVBL))
 726                                 in_vbl = false;
 727                 }
 728         }
 729
 730         return in_vbl;
 731 }
 732
 733 static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish)
 734 {
 735         u32 stat_crtc = 0;
 736         bool in_vbl = radeon_pm_in_vbl(rdev);
 737
 738         if (in_vbl == false)
 739                 DRM_DEBUG_DRIVER("not in vbl for pm change %08x at %s\n", stat_crtc,
 740                          finish ? "exit" : "entry");
 741         return in_vbl;
 742 }
 743
 744 static void radeon_dynpm_idle_work_handler(struct work_struct *work)
 745 {
 746         struct radeon_device *rdev;
 747         int resched;
 748         rdev = container_of(work, struct radeon_device,
 749                                 pm.dynpm_idle_work.work);
 750
 751         resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev);
 752         mutex_lock(&rdev->pm.mutex);
 753         if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) {
 754                 unsigned long irq_flags;
 755                 int not_processed = 0;
 756
 757                 read_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
 758                 if (!list_empty(&rdev->fence_drv.emited)) {
 759                         struct list_head *ptr;
 760                         list_for_each(ptr, &rdev->fence_drv.emited) {
 761                                 /* count up to 3, that's enought info */
 762                                 if (++not_processed >= 3)
 763                                         break;
 764                         }
 765                 }
 766                 read_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
 767
 768                 if (not_processed >= 3) { /* should upclock */
 769                         if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_DOWNCLOCK) {
 770                                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 771                         } else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE &&
 772                                    rdev->pm.dynpm_can_upclock) {
 773                                 rdev->pm.dynpm_planned_action =
 774                                         DYNPM_ACTION_UPCLOCK;
 775                                 rdev->pm.dynpm_action_timeout = jiffies +
 776                                 msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
 777                         }
 778                 } else if (not_processed == 0) { /* should downclock */
 779                         if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_UPCLOCK) {
 780                                 rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
 781                         } else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE &&
 782                                    rdev->pm.dynpm_can_downclock) {
 783                                 rdev->pm.dynpm_planned_action =
 784                                         DYNPM_ACTION_DOWNCLOCK;
 785                                 rdev->pm.dynpm_action_timeout = jiffies +
 786                                 msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
 787                         }
 788                 }
 789
 790                 /* Note, radeon_pm_set_clocks is called with static_switch set
 791                  * to false since we want to wait for vbl to avoid flicker.
 792                  */
 793                 if (rdev->pm.dynpm_planned_action != DYNPM_ACTION_NONE &&
 794                     jiffies > rdev->pm.dynpm_action_timeout) {
 795                         radeon_pm_get_dynpm_state(rdev);
 796                         radeon_pm_set_clocks(rdev);
 797                 }
 798
 799                 queue_delayed_work(rdev->wq, &rdev->pm.dynpm_idle_work,
 800                                         msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 801         }
 802         mutex_unlock(&rdev->pm.mutex);
 803         ttm_bo_unlock_delayed_workqueue(&rdev->mman.bdev, resched);
 804 }
 805
 806 /*
 807  * Debugfs info
 808  */
 809 #if defined(CONFIG_DEBUG_FS)
 810
 811 static int radeon_debugfs_pm_info(struct seq_file *m, void *data)
 812 {
 813         struct drm_info_node *node = (struct drm_info_node *) m->private;
 814         struct drm_device *dev = node->minor->dev;
 815         struct radeon_device *rdev = dev->dev_private;
 816
 817         seq_printf(m, "default engine clock: %u0 kHz\n", rdev->clock.default_sclk);
 818         seq_printf(m, "current engine clock: %u0 kHz\n", radeon_get_engine_clock(rdev));
 819         seq_printf(m, "default memory clock: %u0 kHz\n", rdev->clock.default_mclk);
 820         if (rdev->asic->get_memory_clock)
 821                 seq_printf(m, "current memory clock: %u0 kHz\n", radeon_get_memory_clock(rdev));
 822         if (rdev->pm.current_vddc)
 823                 seq_printf(m, "voltage: %u mV\n", rdev->pm.current_vddc);
 824         if (rdev->asic->get_pcie_lanes)
 825                 seq_printf(m, "PCIE lanes: %d\n", radeon_get_pcie_lanes(rdev));
 826
 827         return 0;
 828 }
 829
 830 static struct drm_info_list radeon_pm_info_list[] = {
 831         {"radeon_pm_info", radeon_debugfs_pm_info, 0, NULL},
 832 };
 833 #endif
 834
 835 static int radeon_debugfs_pm_init(struct radeon_device *rdev)
 836 {
 837 #if defined(CONFIG_DEBUG_FS)
 838         return radeon_debugfs_add_files(rdev, radeon_pm_info_list, ARRAY_SIZE(radeon_pm_info_list));
 839 #else
 840         return 0;
 841 #endif
 842 }