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
  27 #define RADEON_IDLE_LOOP_MS 100
  28 #define RADEON_RECLOCK_DELAY_MS 200
  29 #define RADEON_WAIT_VBLANK_TIMEOUT 200
  30 #define RADEON_WAIT_IDLE_TIMEOUT 200
  31
  32 static void radeon_pm_idle_work_handler(struct work_struct *work);
  33 static int radeon_debugfs_pm_init(struct radeon_device *rdev);
  34
  35 static void radeon_unmap_vram_bos(struct radeon_device *rdev)
  36 {
  37         struct radeon_bo *bo, *n;
  38
  39         if (list_empty(&rdev->gem.objects))
  40                 return;
  41
  42         list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
  43                 if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
  44                         ttm_bo_unmap_virtual(&bo->tbo);
  45         }
  46
  47         if (rdev->gart.table.vram.robj)
  48                 ttm_bo_unmap_virtual(&rdev->gart.table.vram.robj->tbo);
  49
  50         if (rdev->stollen_vga_memory)
  51                 ttm_bo_unmap_virtual(&rdev->stollen_vga_memory->tbo);
  52
  53         if (rdev->r600_blit.shader_obj)
  54                 ttm_bo_unmap_virtual(&rdev->r600_blit.shader_obj->tbo);
  55 }
  56
  57 static void radeon_pm_set_clocks(struct radeon_device *rdev, int static_switch)
  58 {
  59         int i;
  60
  61         if (rdev->pm.state != PM_STATE_DISABLED)
  62                 radeon_get_power_state(rdev, rdev->pm.planned_action);
  63
  64         mutex_lock(&rdev->ddev->struct_mutex);
  65         mutex_lock(&rdev->vram_mutex);
  66         mutex_lock(&rdev->cp.mutex);
  67
  68         /* gui idle int has issues on older chips it seems */
  69         if (rdev->family >= CHIP_R600) {
  70                 /* wait for GPU idle */
  71                 rdev->pm.gui_idle = false;
  72                 rdev->irq.gui_idle = true;
  73                 radeon_irq_set(rdev);
  74                 wait_event_interruptible_timeout(
  75                         rdev->irq.idle_queue, rdev->pm.gui_idle,
  76                         msecs_to_jiffies(RADEON_WAIT_IDLE_TIMEOUT));
  77                 rdev->irq.gui_idle = false;
  78                 radeon_irq_set(rdev);
  79         } else {
  80                 struct radeon_fence *fence;
  81                 radeon_ring_alloc(rdev, 64);
  82                 radeon_fence_create(rdev, &fence);
  83                 radeon_fence_emit(rdev, fence);
  84                 radeon_ring_commit(rdev);
  85                 radeon_fence_wait(fence, false);
  86                 radeon_fence_unref(&fence);
  87         }
  88         radeon_unmap_vram_bos(rdev);
  89
  90         if (!static_switch) {
  91                 for (i = 0; i < rdev->num_crtc; i++) {
  92                         if (rdev->pm.active_crtcs & (1 << i)) {
  93                                 rdev->pm.req_vblank |= (1 << i);
  94                                 drm_vblank_get(rdev->ddev, i);
  95                         }
  96                 }
  97         }
  98
  99         radeon_set_power_state(rdev, static_switch);
 100
 101         if (!static_switch) {
 102                 for (i = 0; i < rdev->num_crtc; i++) {
 103                         if (rdev->pm.req_vblank & (1 << i)) {
 104                                 rdev->pm.req_vblank &= ~(1 << i);
 105                                 drm_vblank_put(rdev->ddev, i);
 106                         }
 107                 }
 108         }
 109
 110         /* update display watermarks based on new power state */
 111         radeon_update_bandwidth_info(rdev);
 112         if (rdev->pm.active_crtc_count)
 113                 radeon_bandwidth_update(rdev);
 114
 115         rdev->pm.planned_action = PM_ACTION_NONE;
 116
 117         mutex_unlock(&rdev->cp.mutex);
 118         mutex_unlock(&rdev->vram_mutex);
 119         mutex_unlock(&rdev->ddev->struct_mutex);
 120 }
 121
 122 static ssize_t radeon_get_power_state_static(struct device *dev,
 123                                              struct device_attribute *attr,
 124                                              char *buf)
 125 {
 126         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 127         struct radeon_device *rdev = ddev->dev_private;
 128
 129         return snprintf(buf, PAGE_SIZE, "%d.%d\n", rdev->pm.current_power_state_index,
 130                         rdev->pm.current_clock_mode_index);
 131 }
 132
 133 static ssize_t radeon_set_power_state_static(struct device *dev,
 134                                              struct device_attribute *attr,
 135                                              const char *buf,
 136                                              size_t count)
 137 {
 138         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 139         struct radeon_device *rdev = ddev->dev_private;
 140         int ps, cm;
 141
 142         if (sscanf(buf, "%u.%u", &ps, &cm) != 2) {
 143                 DRM_ERROR("Invalid power state!\n");
 144                 return count;
 145         }
 146
 147         mutex_lock(&rdev->pm.mutex);
 148         if ((ps >= 0) && (ps < rdev->pm.num_power_states) &&
 149             (cm >= 0) && (cm < rdev->pm.power_state[ps].num_clock_modes)) {
 150                 if ((rdev->pm.active_crtc_count > 0) &&
 151                     (rdev->pm.power_state[ps].clock_info[cm].flags & RADEON_PM_MODE_NO_DISPLAY)) {
 152                         DRM_ERROR("Invalid power state for display: %d.%d\n", ps, cm);
 153                 } else if ((rdev->pm.active_crtc_count > 1) &&
 154                            (rdev->pm.power_state[ps].flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY)) {
 155                         DRM_ERROR("Invalid power state for multi-head: %d.%d\n", ps, cm);
 156                 } else {
 157                         /* disable dynpm */
 158                         rdev->pm.state = PM_STATE_DISABLED;
 159                         rdev->pm.planned_action = PM_ACTION_NONE;
 160                         rdev->pm.requested_power_state_index = ps;
 161                         rdev->pm.requested_clock_mode_index = cm;
 162                         radeon_pm_set_clocks(rdev, true);
 163                 }
 164         } else
 165                 DRM_ERROR("Invalid power state: %d.%d\n\n", ps, cm);
 166         mutex_unlock(&rdev->pm.mutex);
 167
 168         return count;
 169 }
 170
 171 static ssize_t radeon_get_dynpm(struct device *dev,
 172                                 struct device_attribute *attr,
 173                                 char *buf)
 174 {
 175         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 176         struct radeon_device *rdev = ddev->dev_private;
 177
 178         return snprintf(buf, PAGE_SIZE, "%s\n",
 179                         (rdev->pm.state == PM_STATE_DISABLED) ? "disabled" : "enabled");
 180 }
 181
 182 static ssize_t radeon_set_dynpm(struct device *dev,
 183                                 struct device_attribute *attr,
 184                                 const char *buf,
 185                                 size_t count)
 186 {
 187         struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
 188         struct radeon_device *rdev = ddev->dev_private;
 189         int tmp = simple_strtoul(buf, NULL, 10);
 190
 191         if (tmp == 0) {
 192                 /* update power mode info */
 193                 radeon_pm_compute_clocks(rdev);
 194                 /* disable dynpm */
 195                 mutex_lock(&rdev->pm.mutex);
 196                 rdev->pm.state = PM_STATE_DISABLED;
 197                 rdev->pm.planned_action = PM_ACTION_NONE;
 198                 mutex_unlock(&rdev->pm.mutex);
 199                 DRM_INFO("radeon: dynamic power management disabled\n");
 200         } else if (tmp == 1) {
 201                 if (rdev->pm.num_power_states > 1) {
 202                         /* enable dynpm */
 203                         mutex_lock(&rdev->pm.mutex);
 204                         rdev->pm.state = PM_STATE_PAUSED;
 205                         rdev->pm.planned_action = PM_ACTION_DEFAULT;
 206                         radeon_get_power_state(rdev, rdev->pm.planned_action);
 207                         mutex_unlock(&rdev->pm.mutex);
 208                         /* update power mode info */
 209                         radeon_pm_compute_clocks(rdev);
 210                         DRM_INFO("radeon: dynamic power management enabled\n");
 211                 } else
 212                         DRM_ERROR("dynpm not valid on this system\n");
 213         } else
 214                 DRM_ERROR("Invalid setting: %d\n", tmp);
 215
 216         return count;
 217 }
 218
 219 static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, radeon_get_power_state_static, radeon_set_power_state_static);
 220 static DEVICE_ATTR(dynpm, S_IRUGO | S_IWUSR, radeon_get_dynpm, radeon_set_dynpm);
 221
 222
 223 static const char *pm_state_names[4] = {
 224         "PM_STATE_DISABLED",
 225         "PM_STATE_MINIMUM",
 226         "PM_STATE_PAUSED",
 227         "PM_STATE_ACTIVE"
 228 };
 229
 230 static const char *pm_state_types[5] = {
 231         "",
 232         "Powersave",
 233         "Battery",
 234         "Balanced",
 235         "Performance",
 236 };
 237
 238 static void radeon_print_power_mode_info(struct radeon_device *rdev)
 239 {
 240         int i, j;
 241         bool is_default;
 242
 243         DRM_INFO("%d Power State(s)\n", rdev->pm.num_power_states);
 244         for (i = 0; i < rdev->pm.num_power_states; i++) {
 245                 if (rdev->pm.default_power_state_index == i)
 246                         is_default = true;
 247                 else
 248                         is_default = false;
 249                 DRM_INFO("State %d %s %s\n", i,
 250                          pm_state_types[rdev->pm.power_state[i].type],
 251                          is_default ? "(default)" : "");
 252                 if ((rdev->flags & RADEON_IS_PCIE) && !(rdev->flags & RADEON_IS_IGP))
 253                         DRM_INFO("\t%d PCIE Lanes\n", rdev->pm.power_state[i].pcie_lanes);
 254                 if (rdev->pm.power_state[i].flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY)
 255                         DRM_INFO("\tSingle display only\n");
 256                 DRM_INFO("\t%d Clock Mode(s)\n", rdev->pm.power_state[i].num_clock_modes);
 257                 for (j = 0; j < rdev->pm.power_state[i].num_clock_modes; j++) {
 258                         if (rdev->flags & RADEON_IS_IGP)
 259                                 DRM_INFO("\t\t%d engine: %d\n",
 260                                          j,
 261                                          rdev->pm.power_state[i].clock_info[j].sclk * 10);
 262                         else
 263                                 DRM_INFO("\t\t%d engine/memory: %d/%d\n",
 264                                          j,
 265                                          rdev->pm.power_state[i].clock_info[j].sclk * 10,
 266                                          rdev->pm.power_state[i].clock_info[j].mclk * 10);
 267                         if (rdev->pm.power_state[i].clock_info[j].flags & RADEON_PM_MODE_NO_DISPLAY)
 268                                 DRM_INFO("\t\tNo display only\n");
 269                 }
 270         }
 271 }
 272
 273 void radeon_sync_with_vblank(struct radeon_device *rdev)
 274 {
 275         if (rdev->pm.active_crtcs) {
 276                 rdev->pm.vblank_sync = false;
 277                 wait_event_timeout(
 278                         rdev->irq.vblank_queue, rdev->pm.vblank_sync,
 279                         msecs_to_jiffies(RADEON_WAIT_VBLANK_TIMEOUT));
 280         }
 281 }
 282
 283 int radeon_pm_init(struct radeon_device *rdev)
 284 {
 285         rdev->pm.state = PM_STATE_DISABLED;
 286         rdev->pm.planned_action = PM_ACTION_NONE;
 287         rdev->pm.can_upclock = true;
 288         rdev->pm.can_downclock = true;
 289
 290         if (rdev->bios) {
 291                 if (rdev->is_atom_bios)
 292                         radeon_atombios_get_power_modes(rdev);
 293                 else
 294                         radeon_combios_get_power_modes(rdev);
 295                 radeon_print_power_mode_info(rdev);
 296         }
 297
 298         if (radeon_debugfs_pm_init(rdev)) {
 299                 DRM_ERROR("Failed to register debugfs file for PM!\n");
 300         }
 301
 302         /* where's the best place to put this? */
 303         device_create_file(rdev->dev, &dev_attr_power_state);
 304         device_create_file(rdev->dev, &dev_attr_dynpm);
 305
 306         INIT_DELAYED_WORK(&rdev->pm.idle_work, radeon_pm_idle_work_handler);
 307
 308         if ((radeon_dynpm != -1 && radeon_dynpm) && (rdev->pm.num_power_states > 1)) {
 309                 rdev->pm.state = PM_STATE_PAUSED;
 310                 DRM_INFO("radeon: dynamic power management enabled\n");
 311         }
 312
 313         DRM_INFO("radeon: power management initialized\n");
 314
 315         return 0;
 316 }
 317
 318 void radeon_pm_fini(struct radeon_device *rdev)
 319 {
 320         if (rdev->pm.state != PM_STATE_DISABLED) {
 321                 /* cancel work */
 322                 cancel_delayed_work_sync(&rdev->pm.idle_work);
 323                 /* reset default clocks */
 324                 rdev->pm.state = PM_STATE_DISABLED;
 325                 rdev->pm.planned_action = PM_ACTION_DEFAULT;
 326                 radeon_pm_set_clocks(rdev, true);
 327         } else if ((rdev->pm.current_power_state_index !=
 328                     rdev->pm.default_power_state_index) ||
 329                    (rdev->pm.current_clock_mode_index != 0)) {
 330                 rdev->pm.requested_power_state_index = rdev->pm.default_power_state_index;
 331                 rdev->pm.requested_clock_mode_index = 0;
 332                 mutex_lock(&rdev->pm.mutex);
 333                 radeon_pm_set_clocks(rdev, true);
 334                 mutex_unlock(&rdev->pm.mutex);
 335         }
 336
 337         device_remove_file(rdev->dev, &dev_attr_power_state);
 338         device_remove_file(rdev->dev, &dev_attr_dynpm);
 339
 340         if (rdev->pm.i2c_bus)
 341                 radeon_i2c_destroy(rdev->pm.i2c_bus);
 342 }
 343
 344 void radeon_pm_compute_clocks(struct radeon_device *rdev)
 345 {
 346         struct drm_device *ddev = rdev->ddev;
 347         struct drm_crtc *crtc;
 348         struct radeon_crtc *radeon_crtc;
 349
 350         mutex_lock(&rdev->pm.mutex);
 351
 352         rdev->pm.active_crtcs = 0;
 353         rdev->pm.active_crtc_count = 0;
 354         list_for_each_entry(crtc,
 355                 &ddev->mode_config.crtc_list, head) {
 356                 radeon_crtc = to_radeon_crtc(crtc);
 357                 if (radeon_crtc->enabled) {
 358                         rdev->pm.active_crtcs |= (1 << radeon_crtc->crtc_id);
 359                         rdev->pm.active_crtc_count++;
 360                 }
 361         }
 362
 363         if (rdev->pm.state == PM_STATE_DISABLED) {
 364                 mutex_unlock(&rdev->pm.mutex);
 365                 return;
 366         }
 367
 368         /* Note, radeon_pm_set_clocks is called with static_switch set
 369          * to true since we always want to statically set the clocks,
 370          * not wait for vbl.
 371          */
 372         if (rdev->pm.active_crtc_count > 1) {
 373                 if (rdev->pm.state == PM_STATE_ACTIVE) {
 374                         cancel_delayed_work(&rdev->pm.idle_work);
 375
 376                         rdev->pm.state = PM_STATE_PAUSED;
 377                         rdev->pm.planned_action = PM_ACTION_DEFAULT;
 378                         radeon_pm_set_clocks(rdev, true);
 379
 380                         DRM_DEBUG("radeon: dynamic power management deactivated\n");
 381                 }
 382         } else if (rdev->pm.active_crtc_count == 1) {
 383                 /* TODO: Increase clocks if needed for current mode */
 384
 385                 if (rdev->pm.state == PM_STATE_MINIMUM) {
 386                         rdev->pm.state = PM_STATE_ACTIVE;
 387                         rdev->pm.planned_action = PM_ACTION_UPCLOCK;
 388                         radeon_pm_set_clocks(rdev, true);
 389
 390                         queue_delayed_work(rdev->wq, &rdev->pm.idle_work,
 391                                 msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 392                 } else if (rdev->pm.state == PM_STATE_PAUSED) {
 393                         rdev->pm.state = PM_STATE_ACTIVE;
 394                         queue_delayed_work(rdev->wq, &rdev->pm.idle_work,
 395                                 msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 396                         DRM_DEBUG("radeon: dynamic power management activated\n");
 397                 }
 398         } else { /* count == 0 */
 399                 if (rdev->pm.state != PM_STATE_MINIMUM) {
 400                         cancel_delayed_work(&rdev->pm.idle_work);
 401
 402                         rdev->pm.state = PM_STATE_MINIMUM;
 403                         rdev->pm.planned_action = PM_ACTION_MINIMUM;
 404                         radeon_pm_set_clocks(rdev, true);
 405                 }
 406         }
 407
 408         mutex_unlock(&rdev->pm.mutex);
 409 }
 410
 411 bool radeon_pm_in_vbl(struct radeon_device *rdev)
 412 {
 413         u32 stat_crtc = 0, vbl = 0, position = 0;
 414         bool in_vbl = true;
 415
 416         if (ASIC_IS_DCE4(rdev)) {
 417                 if (rdev->pm.active_crtcs & (1 << 0)) {
 418                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 419                                      EVERGREEN_CRTC0_REGISTER_OFFSET) & 0xfff;
 420                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 421                                           EVERGREEN_CRTC0_REGISTER_OFFSET) & 0xfff;
 422                 }
 423                 if (rdev->pm.active_crtcs & (1 << 1)) {
 424                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 425                                      EVERGREEN_CRTC1_REGISTER_OFFSET) & 0xfff;
 426                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 427                                           EVERGREEN_CRTC1_REGISTER_OFFSET) & 0xfff;
 428                 }
 429                 if (rdev->pm.active_crtcs & (1 << 2)) {
 430                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 431                                      EVERGREEN_CRTC2_REGISTER_OFFSET) & 0xfff;
 432                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 433                                           EVERGREEN_CRTC2_REGISTER_OFFSET) & 0xfff;
 434                 }
 435                 if (rdev->pm.active_crtcs & (1 << 3)) {
 436                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 437                                      EVERGREEN_CRTC3_REGISTER_OFFSET) & 0xfff;
 438                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 439                                           EVERGREEN_CRTC3_REGISTER_OFFSET) & 0xfff;
 440                 }
 441                 if (rdev->pm.active_crtcs & (1 << 4)) {
 442                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 443                                      EVERGREEN_CRTC4_REGISTER_OFFSET) & 0xfff;
 444                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 445                                           EVERGREEN_CRTC4_REGISTER_OFFSET) & 0xfff;
 446                 }
 447                 if (rdev->pm.active_crtcs & (1 << 5)) {
 448                         vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
 449                                      EVERGREEN_CRTC5_REGISTER_OFFSET) & 0xfff;
 450                         position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
 451                                           EVERGREEN_CRTC5_REGISTER_OFFSET) & 0xfff;
 452                 }
 453         } else if (ASIC_IS_AVIVO(rdev)) {
 454                 if (rdev->pm.active_crtcs & (1 << 0)) {
 455                         vbl = RREG32(AVIVO_D1CRTC_V_BLANK_START_END) & 0xfff;
 456                         position = RREG32(AVIVO_D1CRTC_STATUS_POSITION) & 0xfff;
 457                 }
 458                 if (rdev->pm.active_crtcs & (1 << 1)) {
 459                         vbl = RREG32(AVIVO_D2CRTC_V_BLANK_START_END) & 0xfff;
 460                         position = RREG32(AVIVO_D2CRTC_STATUS_POSITION) & 0xfff;
 461                 }
 462                 if (position < vbl && position > 1)
 463                         in_vbl = false;
 464         } else {
 465                 if (rdev->pm.active_crtcs & (1 << 0)) {
 466                         stat_crtc = RREG32(RADEON_CRTC_STATUS);
 467                         if (!(stat_crtc & 1))
 468                                 in_vbl = false;
 469                 }
 470                 if (rdev->pm.active_crtcs & (1 << 1)) {
 471                         stat_crtc = RREG32(RADEON_CRTC2_STATUS);
 472                         if (!(stat_crtc & 1))
 473                                 in_vbl = false;
 474                 }
 475         }
 476
 477         if (position < vbl && position > 1)
 478                 in_vbl = false;
 479
 480         return in_vbl;
 481 }
 482
 483 bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish)
 484 {
 485         u32 stat_crtc = 0;
 486         bool in_vbl = radeon_pm_in_vbl(rdev);
 487
 488         if (in_vbl == false)
 489                 DRM_INFO("not in vbl for pm change %08x at %s\n", stat_crtc,
 490                          finish ? "exit" : "entry");
 491         return in_vbl;
 492 }
 493
 494 static void radeon_pm_idle_work_handler(struct work_struct *work)
 495 {
 496         struct radeon_device *rdev;
 497         int resched;
 498         rdev = container_of(work, struct radeon_device,
 499                                 pm.idle_work.work);
 500
 501         resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev);
 502         mutex_lock(&rdev->pm.mutex);
 503         if (rdev->pm.state == PM_STATE_ACTIVE) {
 504                 unsigned long irq_flags;
 505                 int not_processed = 0;
 506
 507                 read_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
 508                 if (!list_empty(&rdev->fence_drv.emited)) {
 509                         struct list_head *ptr;
 510                         list_for_each(ptr, &rdev->fence_drv.emited) {
 511                                 /* count up to 3, that's enought info */
 512                                 if (++not_processed >= 3)
 513                                         break;
 514                         }
 515                 }
 516                 read_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);
 517
 518                 if (not_processed >= 3) { /* should upclock */
 519                         if (rdev->pm.planned_action == PM_ACTION_DOWNCLOCK) {
 520                                 rdev->pm.planned_action = PM_ACTION_NONE;
 521                         } else if (rdev->pm.planned_action == PM_ACTION_NONE &&
 522                                    rdev->pm.can_upclock) {
 523                                 rdev->pm.planned_action =
 524                                         PM_ACTION_UPCLOCK;
 525                                 rdev->pm.action_timeout = jiffies +
 526                                 msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
 527                         }
 528                 } else if (not_processed == 0) { /* should downclock */
 529                         if (rdev->pm.planned_action == PM_ACTION_UPCLOCK) {
 530                                 rdev->pm.planned_action = PM_ACTION_NONE;
 531                         } else if (rdev->pm.planned_action == PM_ACTION_NONE &&
 532                                    rdev->pm.can_downclock) {
 533                                 rdev->pm.planned_action =
 534                                         PM_ACTION_DOWNCLOCK;
 535                                 rdev->pm.action_timeout = jiffies +
 536                                 msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
 537                         }
 538                 }
 539
 540                 /* Note, radeon_pm_set_clocks is called with static_switch set
 541                  * to false since we want to wait for vbl to avoid flicker.
 542                  */
 543                 if (rdev->pm.planned_action != PM_ACTION_NONE &&
 544                     jiffies > rdev->pm.action_timeout) {
 545                         radeon_pm_set_clocks(rdev, false);
 546                 }
 547         }
 548         mutex_unlock(&rdev->pm.mutex);
 549         ttm_bo_unlock_delayed_workqueue(&rdev->mman.bdev, resched);
 550
 551         queue_delayed_work(rdev->wq, &rdev->pm.idle_work,
 552                                         msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
 553 }
 554
 555 /*
 556  * Debugfs info
 557  */
 558 #if defined(CONFIG_DEBUG_FS)
 559
 560 static int radeon_debugfs_pm_info(struct seq_file *m, void *data)
 561 {
 562         struct drm_info_node *node = (struct drm_info_node *) m->private;
 563         struct drm_device *dev = node->minor->dev;
 564         struct radeon_device *rdev = dev->dev_private;
 565
 566         seq_printf(m, "state: %s\n", pm_state_names[rdev->pm.state]);
 567         seq_printf(m, "default engine clock: %u0 kHz\n", rdev->clock.default_sclk);
 568         seq_printf(m, "current engine clock: %u0 kHz\n", radeon_get_engine_clock(rdev));
 569         seq_printf(m, "default memory clock: %u0 kHz\n", rdev->clock.default_mclk);
 570         if (rdev->asic->get_memory_clock)
 571                 seq_printf(m, "current memory clock: %u0 kHz\n", radeon_get_memory_clock(rdev));
 572         if (rdev->asic->get_pcie_lanes)
 573                 seq_printf(m, "PCIE lanes: %d\n", radeon_get_pcie_lanes(rdev));
 574
 575         return 0;
 576 }
 577
 578 static struct drm_info_list radeon_pm_info_list[] = {
 579         {"radeon_pm_info", radeon_debugfs_pm_info, 0, NULL},
 580 };
 581 #endif
 582
 583 static int radeon_debugfs_pm_init(struct radeon_device *rdev)
 584 {
 585 #if defined(CONFIG_DEBUG_FS)
 586         return radeon_debugfs_add_files(rdev, radeon_pm_info_list, ARRAY_SIZE(radeon_pm_info_list));
 587 #else
 588         return 0;
 589 #endif
 590 }