xref: /netbsd-src/sys/external/bsd/drm2/dist/drm/radeon/radeon_pm.c (revision 479d8f7d843cc1b22d497efdf1f27a50ee8418d4)
1 /*
2  * Permission is hereby granted, free of charge, to any person obtaining a
3  * copy of this software and associated documentation files (the "Software"),
4  * to deal in the Software without restriction, including without limitation
5  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
6  * and/or sell copies of the Software, and to permit persons to whom the
7  * Software is furnished to do so, subject to the following conditions:
8  *
9  * The above copyright notice and this permission notice shall be included in
10  * all copies or substantial portions of the Software.
11  *
12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
13  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
15  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
16  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
17  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
18  * OTHER DEALINGS IN THE SOFTWARE.
19  *
20  * Authors: Rafał Miłecki <zajec5@gmail.com>
21  *          Alex Deucher <alexdeucher@gmail.com>
22  */
23 #include <drm/drmP.h>
24 #include "radeon.h"
25 #include "avivod.h"
26 #include "atom.h"
27 #include <linux/power_supply.h>
28 #include <linux/hwmon.h>
29 #include <linux/hwmon-sysfs.h>
30 
31 #define RADEON_IDLE_LOOP_MS 100
32 #define RADEON_RECLOCK_DELAY_MS 200
33 #define RADEON_WAIT_VBLANK_TIMEOUT 200
34 
35 static const char *radeon_pm_state_type_name[5] = {
36 	"",
37 	"Powersave",
38 	"Battery",
39 	"Balanced",
40 	"Performance",
41 };
42 
43 static void radeon_dynpm_idle_work_handler(struct work_struct *work);
44 static int radeon_debugfs_pm_init(struct radeon_device *rdev);
45 static bool radeon_pm_in_vbl(struct radeon_device *rdev);
46 static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish);
47 static void radeon_pm_update_profile(struct radeon_device *rdev);
48 static void radeon_pm_set_clocks(struct radeon_device *rdev);
49 
50 int radeon_pm_get_type_index(struct radeon_device *rdev,
51 			     enum radeon_pm_state_type ps_type,
52 			     int instance)
53 {
54 	int i;
55 	int found_instance = -1;
56 
57 	for (i = 0; i < rdev->pm.num_power_states; i++) {
58 		if (rdev->pm.power_state[i].type == ps_type) {
59 			found_instance++;
60 			if (found_instance == instance)
61 				return i;
62 		}
63 	}
64 	/* return default if no match */
65 	return rdev->pm.default_power_state_index;
66 }
67 
68 void radeon_pm_acpi_event_handler(struct radeon_device *rdev)
69 {
70 	if ((rdev->pm.pm_method == PM_METHOD_DPM) && rdev->pm.dpm_enabled) {
71 		mutex_lock(&rdev->pm.mutex);
72 		if (power_supply_is_system_supplied() > 0)
73 			rdev->pm.dpm.ac_power = true;
74 		else
75 			rdev->pm.dpm.ac_power = false;
76 		if (rdev->asic->dpm.enable_bapm)
77 			radeon_dpm_enable_bapm(rdev, rdev->pm.dpm.ac_power);
78 		mutex_unlock(&rdev->pm.mutex);
79         } else if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
80 		if (rdev->pm.profile == PM_PROFILE_AUTO) {
81 			mutex_lock(&rdev->pm.mutex);
82 			radeon_pm_update_profile(rdev);
83 			radeon_pm_set_clocks(rdev);
84 			mutex_unlock(&rdev->pm.mutex);
85 		}
86 	}
87 }
88 
89 static void radeon_pm_update_profile(struct radeon_device *rdev)
90 {
91 	switch (rdev->pm.profile) {
92 	case PM_PROFILE_DEFAULT:
93 		rdev->pm.profile_index = PM_PROFILE_DEFAULT_IDX;
94 		break;
95 	case PM_PROFILE_AUTO:
96 		if (power_supply_is_system_supplied() > 0) {
97 			if (rdev->pm.active_crtc_count > 1)
98 				rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;
99 			else
100 				rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;
101 		} else {
102 			if (rdev->pm.active_crtc_count > 1)
103 				rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
104 			else
105 				rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
106 		}
107 		break;
108 	case PM_PROFILE_LOW:
109 		if (rdev->pm.active_crtc_count > 1)
110 			rdev->pm.profile_index = PM_PROFILE_LOW_MH_IDX;
111 		else
112 			rdev->pm.profile_index = PM_PROFILE_LOW_SH_IDX;
113 		break;
114 	case PM_PROFILE_MID:
115 		if (rdev->pm.active_crtc_count > 1)
116 			rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
117 		else
118 			rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
119 		break;
120 	case PM_PROFILE_HIGH:
121 		if (rdev->pm.active_crtc_count > 1)
122 			rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;
123 		else
124 			rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;
125 		break;
126 	}
127 
128 	if (rdev->pm.active_crtc_count == 0) {
129 		rdev->pm.requested_power_state_index =
130 			rdev->pm.profiles[rdev->pm.profile_index].dpms_off_ps_idx;
131 		rdev->pm.requested_clock_mode_index =
132 			rdev->pm.profiles[rdev->pm.profile_index].dpms_off_cm_idx;
133 	} else {
134 		rdev->pm.requested_power_state_index =
135 			rdev->pm.profiles[rdev->pm.profile_index].dpms_on_ps_idx;
136 		rdev->pm.requested_clock_mode_index =
137 			rdev->pm.profiles[rdev->pm.profile_index].dpms_on_cm_idx;
138 	}
139 }
140 
141 static void radeon_unmap_vram_bos(struct radeon_device *rdev)
142 {
143 	struct radeon_bo *bo, *n;
144 
145 	if (list_empty(&rdev->gem.objects))
146 		return;
147 
148 	list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
149 		if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
150 			ttm_bo_unmap_virtual(&bo->tbo);
151 	}
152 }
153 
154 static void radeon_sync_with_vblank(struct radeon_device *rdev)
155 {
156 	if (rdev->pm.active_crtcs) {
157 #ifdef __NetBSD__
158 		int ret __unused;
159 
160 		spin_lock(&rdev->irq.vblank_lock);
161 		rdev->pm.vblank_sync = false;
162 		DRM_SPIN_TIMED_WAIT_NOINTR_UNTIL(ret, &rdev->irq.vblank_queue,
163 		    &rdev->irq.vblank_lock,
164 		    msecs_to_jiffies(RADEON_WAIT_VBLANK_TIMEOUT),
165 		    rdev->pm.vblank_sync);
166 		spin_unlock(&rdev->irq.vblank_lock);
167 #else
168 		rdev->pm.vblank_sync = false;
169 		wait_event_timeout(
170 			rdev->irq.vblank_queue, rdev->pm.vblank_sync,
171 			msecs_to_jiffies(RADEON_WAIT_VBLANK_TIMEOUT));
172 #endif
173 	}
174 }
175 
176 static void radeon_set_power_state(struct radeon_device *rdev)
177 {
178 	u32 sclk, mclk;
179 	bool misc_after = false;
180 
181 	if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) &&
182 	    (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index))
183 		return;
184 
185 	if (radeon_gui_idle(rdev)) {
186 		sclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
187 			clock_info[rdev->pm.requested_clock_mode_index].sclk;
188 		if (sclk > rdev->pm.default_sclk)
189 			sclk = rdev->pm.default_sclk;
190 
191 		/* starting with BTC, there is one state that is used for both
192 		 * MH and SH.  Difference is that we always use the high clock index for
193 		 * mclk and vddci.
194 		 */
195 		if ((rdev->pm.pm_method == PM_METHOD_PROFILE) &&
196 		    (rdev->family >= CHIP_BARTS) &&
197 		    rdev->pm.active_crtc_count &&
198 		    ((rdev->pm.profile_index == PM_PROFILE_MID_MH_IDX) ||
199 		     (rdev->pm.profile_index == PM_PROFILE_LOW_MH_IDX)))
200 			mclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
201 				clock_info[rdev->pm.profiles[PM_PROFILE_HIGH_MH_IDX].dpms_on_cm_idx].mclk;
202 		else
203 			mclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
204 				clock_info[rdev->pm.requested_clock_mode_index].mclk;
205 
206 		if (mclk > rdev->pm.default_mclk)
207 			mclk = rdev->pm.default_mclk;
208 
209 		/* upvolt before raising clocks, downvolt after lowering clocks */
210 		if (sclk < rdev->pm.current_sclk)
211 			misc_after = true;
212 
213 		radeon_sync_with_vblank(rdev);
214 
215 		if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
216 			if (!radeon_pm_in_vbl(rdev))
217 				return;
218 		}
219 
220 		radeon_pm_prepare(rdev);
221 
222 		if (!misc_after)
223 			/* voltage, pcie lanes, etc.*/
224 			radeon_pm_misc(rdev);
225 
226 		/* set engine clock */
227 		if (sclk != rdev->pm.current_sclk) {
228 			radeon_pm_debug_check_in_vbl(rdev, false);
229 			radeon_set_engine_clock(rdev, sclk);
230 			radeon_pm_debug_check_in_vbl(rdev, true);
231 			rdev->pm.current_sclk = sclk;
232 			DRM_DEBUG_DRIVER("Setting: e: %d\n", sclk);
233 		}
234 
235 		/* set memory clock */
236 		if (rdev->asic->pm.set_memory_clock && (mclk != rdev->pm.current_mclk)) {
237 			radeon_pm_debug_check_in_vbl(rdev, false);
238 			radeon_set_memory_clock(rdev, mclk);
239 			radeon_pm_debug_check_in_vbl(rdev, true);
240 			rdev->pm.current_mclk = mclk;
241 			DRM_DEBUG_DRIVER("Setting: m: %d\n", mclk);
242 		}
243 
244 		if (misc_after)
245 			/* voltage, pcie lanes, etc.*/
246 			radeon_pm_misc(rdev);
247 
248 		radeon_pm_finish(rdev);
249 
250 		rdev->pm.current_power_state_index = rdev->pm.requested_power_state_index;
251 		rdev->pm.current_clock_mode_index = rdev->pm.requested_clock_mode_index;
252 	} else
253 		DRM_DEBUG_DRIVER("pm: GUI not idle!!!\n");
254 }
255 
256 static void radeon_pm_set_clocks(struct radeon_device *rdev)
257 {
258 	int i, r;
259 
260 	/* no need to take locks, etc. if nothing's going to change */
261 	if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) &&
262 	    (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index))
263 		return;
264 
265 	mutex_lock(&rdev->ddev->struct_mutex);
266 	down_write(&rdev->pm.mclk_lock);
267 	mutex_lock(&rdev->ring_lock);
268 
269 	/* wait for the rings to drain */
270 	for (i = 0; i < RADEON_NUM_RINGS; i++) {
271 		struct radeon_ring *ring = &rdev->ring[i];
272 		if (!ring->ready) {
273 			continue;
274 		}
275 		r = radeon_fence_wait_empty(rdev, i);
276 		if (r) {
277 			/* needs a GPU reset dont reset here */
278 			mutex_unlock(&rdev->ring_lock);
279 			up_write(&rdev->pm.mclk_lock);
280 			mutex_unlock(&rdev->ddev->struct_mutex);
281 			return;
282 		}
283 	}
284 
285 	radeon_unmap_vram_bos(rdev);
286 
287 	if (rdev->irq.installed) {
288 		for (i = 0; i < rdev->num_crtc; i++) {
289 			if (rdev->pm.active_crtcs & (1 << i)) {
290 				rdev->pm.req_vblank |= (1 << i);
291 				drm_vblank_get(rdev->ddev, i);
292 			}
293 		}
294 	}
295 
296 	radeon_set_power_state(rdev);
297 
298 	if (rdev->irq.installed) {
299 		for (i = 0; i < rdev->num_crtc; i++) {
300 			if (rdev->pm.req_vblank & (1 << i)) {
301 				rdev->pm.req_vblank &= ~(1 << i);
302 				drm_vblank_put(rdev->ddev, i);
303 			}
304 		}
305 	}
306 
307 	/* update display watermarks based on new power state */
308 	radeon_update_bandwidth_info(rdev);
309 	if (rdev->pm.active_crtc_count)
310 		radeon_bandwidth_update(rdev);
311 
312 	rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
313 
314 	mutex_unlock(&rdev->ring_lock);
315 	up_write(&rdev->pm.mclk_lock);
316 	mutex_unlock(&rdev->ddev->struct_mutex);
317 }
318 
319 static void radeon_pm_print_states(struct radeon_device *rdev)
320 {
321 	int i, j;
322 	struct radeon_power_state *power_state;
323 	struct radeon_pm_clock_info *clock_info;
324 
325 	DRM_DEBUG_DRIVER("%d Power State(s)\n", rdev->pm.num_power_states);
326 	for (i = 0; i < rdev->pm.num_power_states; i++) {
327 		power_state = &rdev->pm.power_state[i];
328 		DRM_DEBUG_DRIVER("State %d: %s\n", i,
329 			radeon_pm_state_type_name[power_state->type]);
330 		if (i == rdev->pm.default_power_state_index)
331 			DRM_DEBUG_DRIVER("\tDefault");
332 		if ((rdev->flags & RADEON_IS_PCIE) && !(rdev->flags & RADEON_IS_IGP))
333 			DRM_DEBUG_DRIVER("\t%d PCIE Lanes\n", power_state->pcie_lanes);
334 		if (power_state->flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY)
335 			DRM_DEBUG_DRIVER("\tSingle display only\n");
336 		DRM_DEBUG_DRIVER("\t%d Clock Mode(s)\n", power_state->num_clock_modes);
337 		for (j = 0; j < power_state->num_clock_modes; j++) {
338 			clock_info = &(power_state->clock_info[j]);
339 			if (rdev->flags & RADEON_IS_IGP)
340 				DRM_DEBUG_DRIVER("\t\t%d e: %d\n",
341 						 j,
342 						 clock_info->sclk * 10);
343 			else
344 				DRM_DEBUG_DRIVER("\t\t%d e: %d\tm: %d\tv: %d\n",
345 						 j,
346 						 clock_info->sclk * 10,
347 						 clock_info->mclk * 10,
348 						 clock_info->voltage.voltage);
349 		}
350 	}
351 }
352 
353 #ifndef __NetBSD__		/* XXX radeon power */
354 static ssize_t radeon_get_pm_profile(struct device *dev,
355 				     struct device_attribute *attr,
356 				     char *buf)
357 {
358 	struct drm_device *ddev = dev_get_drvdata(dev);
359 	struct radeon_device *rdev = ddev->dev_private;
360 	int cp = rdev->pm.profile;
361 
362 	return snprintf(buf, PAGE_SIZE, "%s\n",
363 			(cp == PM_PROFILE_AUTO) ? "auto" :
364 			(cp == PM_PROFILE_LOW) ? "low" :
365 			(cp == PM_PROFILE_MID) ? "mid" :
366 			(cp == PM_PROFILE_HIGH) ? "high" : "default");
367 }
368 
369 static ssize_t radeon_set_pm_profile(struct device *dev,
370 				     struct device_attribute *attr,
371 				     const char *buf,
372 				     size_t count)
373 {
374 	struct drm_device *ddev = dev_get_drvdata(dev);
375 	struct radeon_device *rdev = ddev->dev_private;
376 
377 	/* Can't set profile when the card is off */
378 	if  ((rdev->flags & RADEON_IS_PX) &&
379 	     (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
380 		return -EINVAL;
381 
382 	mutex_lock(&rdev->pm.mutex);
383 	if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
384 		if (strncmp("default", buf, strlen("default")) == 0)
385 			rdev->pm.profile = PM_PROFILE_DEFAULT;
386 		else if (strncmp("auto", buf, strlen("auto")) == 0)
387 			rdev->pm.profile = PM_PROFILE_AUTO;
388 		else if (strncmp("low", buf, strlen("low")) == 0)
389 			rdev->pm.profile = PM_PROFILE_LOW;
390 		else if (strncmp("mid", buf, strlen("mid")) == 0)
391 			rdev->pm.profile = PM_PROFILE_MID;
392 		else if (strncmp("high", buf, strlen("high")) == 0)
393 			rdev->pm.profile = PM_PROFILE_HIGH;
394 		else {
395 			count = -EINVAL;
396 			goto fail;
397 		}
398 		radeon_pm_update_profile(rdev);
399 		radeon_pm_set_clocks(rdev);
400 	} else
401 		count = -EINVAL;
402 
403 fail:
404 	mutex_unlock(&rdev->pm.mutex);
405 
406 	return count;
407 }
408 
409 static ssize_t radeon_get_pm_method(struct device *dev,
410 				    struct device_attribute *attr,
411 				    char *buf)
412 {
413 	struct drm_device *ddev = dev_get_drvdata(dev);
414 	struct radeon_device *rdev = ddev->dev_private;
415 	int pm = rdev->pm.pm_method;
416 
417 	return snprintf(buf, PAGE_SIZE, "%s\n",
418 			(pm == PM_METHOD_DYNPM) ? "dynpm" :
419 			(pm == PM_METHOD_PROFILE) ? "profile" : "dpm");
420 }
421 
422 static ssize_t radeon_set_pm_method(struct device *dev,
423 				    struct device_attribute *attr,
424 				    const char *buf,
425 				    size_t count)
426 {
427 	struct drm_device *ddev = dev_get_drvdata(dev);
428 	struct radeon_device *rdev = ddev->dev_private;
429 
430 	/* Can't set method when the card is off */
431 	if  ((rdev->flags & RADEON_IS_PX) &&
432 	     (ddev->switch_power_state != DRM_SWITCH_POWER_ON)) {
433 		count = -EINVAL;
434 		goto fail;
435 	}
436 
437 	/* we don't support the legacy modes with dpm */
438 	if (rdev->pm.pm_method == PM_METHOD_DPM) {
439 		count = -EINVAL;
440 		goto fail;
441 	}
442 
443 	if (strncmp("dynpm", buf, strlen("dynpm")) == 0) {
444 		mutex_lock(&rdev->pm.mutex);
445 		rdev->pm.pm_method = PM_METHOD_DYNPM;
446 		rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;
447 		rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
448 		mutex_unlock(&rdev->pm.mutex);
449 	} else if (strncmp("profile", buf, strlen("profile")) == 0) {
450 		mutex_lock(&rdev->pm.mutex);
451 		/* disable dynpm */
452 		rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
453 		rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
454 		rdev->pm.pm_method = PM_METHOD_PROFILE;
455 		mutex_unlock(&rdev->pm.mutex);
456 		cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
457 	} else {
458 		count = -EINVAL;
459 		goto fail;
460 	}
461 	radeon_pm_compute_clocks(rdev);
462 fail:
463 	return count;
464 }
465 
466 static ssize_t radeon_get_dpm_state(struct device *dev,
467 				    struct device_attribute *attr,
468 				    char *buf)
469 {
470 	struct drm_device *ddev = dev_get_drvdata(dev);
471 	struct radeon_device *rdev = ddev->dev_private;
472 	enum radeon_pm_state_type pm = rdev->pm.dpm.user_state;
473 
474 	if  ((rdev->flags & RADEON_IS_PX) &&
475 	     (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
476 		return snprintf(buf, PAGE_SIZE, "off\n");
477 
478 	return snprintf(buf, PAGE_SIZE, "%s\n",
479 			(pm == POWER_STATE_TYPE_BATTERY) ? "battery" :
480 			(pm == POWER_STATE_TYPE_BALANCED) ? "balanced" : "performance");
481 }
482 
483 static ssize_t radeon_set_dpm_state(struct device *dev,
484 				    struct device_attribute *attr,
485 				    const char *buf,
486 				    size_t count)
487 {
488 	struct drm_device *ddev = dev_get_drvdata(dev);
489 	struct radeon_device *rdev = ddev->dev_private;
490 
491 	/* Can't set dpm state when the card is off */
492 	if  ((rdev->flags & RADEON_IS_PX) &&
493 	     (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
494 		return -EINVAL;
495 
496 	mutex_lock(&rdev->pm.mutex);
497 	if (strncmp("battery", buf, strlen("battery")) == 0)
498 		rdev->pm.dpm.user_state = POWER_STATE_TYPE_BATTERY;
499 	else if (strncmp("balanced", buf, strlen("balanced")) == 0)
500 		rdev->pm.dpm.user_state = POWER_STATE_TYPE_BALANCED;
501 	else if (strncmp("performance", buf, strlen("performance")) == 0)
502 		rdev->pm.dpm.user_state = POWER_STATE_TYPE_PERFORMANCE;
503 	else {
504 		mutex_unlock(&rdev->pm.mutex);
505 		count = -EINVAL;
506 		goto fail;
507 	}
508 	mutex_unlock(&rdev->pm.mutex);
509 	radeon_pm_compute_clocks(rdev);
510 fail:
511 	return count;
512 }
513 
514 static ssize_t radeon_get_dpm_forced_performance_level(struct device *dev,
515 						       struct device_attribute *attr,
516 						       char *buf)
517 {
518 	struct drm_device *ddev = dev_get_drvdata(dev);
519 	struct radeon_device *rdev = ddev->dev_private;
520 	enum radeon_dpm_forced_level level = rdev->pm.dpm.forced_level;
521 
522 	if  ((rdev->flags & RADEON_IS_PX) &&
523 	     (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
524 		return snprintf(buf, PAGE_SIZE, "off\n");
525 
526 	return snprintf(buf, PAGE_SIZE, "%s\n",
527 			(level == RADEON_DPM_FORCED_LEVEL_AUTO) ? "auto" :
528 			(level == RADEON_DPM_FORCED_LEVEL_LOW) ? "low" : "high");
529 }
530 
531 static ssize_t radeon_set_dpm_forced_performance_level(struct device *dev,
532 						       struct device_attribute *attr,
533 						       const char *buf,
534 						       size_t count)
535 {
536 	struct drm_device *ddev = dev_get_drvdata(dev);
537 	struct radeon_device *rdev = ddev->dev_private;
538 	enum radeon_dpm_forced_level level;
539 	int ret = 0;
540 
541 	/* Can't force performance level when the card is off */
542 	if  ((rdev->flags & RADEON_IS_PX) &&
543 	     (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
544 		return -EINVAL;
545 
546 	mutex_lock(&rdev->pm.mutex);
547 	if (strncmp("low", buf, strlen("low")) == 0) {
548 		level = RADEON_DPM_FORCED_LEVEL_LOW;
549 	} else if (strncmp("high", buf, strlen("high")) == 0) {
550 		level = RADEON_DPM_FORCED_LEVEL_HIGH;
551 	} else if (strncmp("auto", buf, strlen("auto")) == 0) {
552 		level = RADEON_DPM_FORCED_LEVEL_AUTO;
553 	} else {
554 		count = -EINVAL;
555 		goto fail;
556 	}
557 	if (rdev->asic->dpm.force_performance_level) {
558 		if (rdev->pm.dpm.thermal_active) {
559 			count = -EINVAL;
560 			goto fail;
561 		}
562 		ret = radeon_dpm_force_performance_level(rdev, level);
563 		if (ret)
564 			count = -EINVAL;
565 	}
566 fail:
567 	mutex_unlock(&rdev->pm.mutex);
568 
569 	return count;
570 }
571 
572 static DEVICE_ATTR(power_profile, S_IRUGO | S_IWUSR, radeon_get_pm_profile, radeon_set_pm_profile);
573 static DEVICE_ATTR(power_method, S_IRUGO | S_IWUSR, radeon_get_pm_method, radeon_set_pm_method);
574 static DEVICE_ATTR(power_dpm_state, S_IRUGO | S_IWUSR, radeon_get_dpm_state, radeon_set_dpm_state);
575 static DEVICE_ATTR(power_dpm_force_performance_level, S_IRUGO | S_IWUSR,
576 		   radeon_get_dpm_forced_performance_level,
577 		   radeon_set_dpm_forced_performance_level);
578 #endif
579 
580 #ifndef __NetBSD__		/* XXX radeon hwmon */
581 static ssize_t radeon_hwmon_show_temp(struct device *dev,
582 				      struct device_attribute *attr,
583 				      char *buf)
584 {
585 	struct radeon_device *rdev = dev_get_drvdata(dev);
586 	struct drm_device *ddev = rdev->ddev;
587 	int temp;
588 
589 	/* Can't get temperature when the card is off */
590 	if  ((rdev->flags & RADEON_IS_PX) &&
591 	     (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
592 		return -EINVAL;
593 
594 	if (rdev->asic->pm.get_temperature)
595 		temp = radeon_get_temperature(rdev);
596 	else
597 		temp = 0;
598 
599 	return snprintf(buf, PAGE_SIZE, "%d\n", temp);
600 }
601 
602 static ssize_t radeon_hwmon_show_temp_thresh(struct device *dev,
603 					     struct device_attribute *attr,
604 					     char *buf)
605 {
606 	struct radeon_device *rdev = dev_get_drvdata(dev);
607 	int hyst = to_sensor_dev_attr(attr)->index;
608 	int temp;
609 
610 	if (hyst)
611 		temp = rdev->pm.dpm.thermal.min_temp;
612 	else
613 		temp = rdev->pm.dpm.thermal.max_temp;
614 
615 	return snprintf(buf, PAGE_SIZE, "%d\n", temp);
616 }
617 
618 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, radeon_hwmon_show_temp, NULL, 0);
619 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, radeon_hwmon_show_temp_thresh, NULL, 0);
620 static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO, radeon_hwmon_show_temp_thresh, NULL, 1);
621 
622 static struct attribute *hwmon_attributes[] = {
623 	&sensor_dev_attr_temp1_input.dev_attr.attr,
624 	&sensor_dev_attr_temp1_crit.dev_attr.attr,
625 	&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
626 	NULL
627 };
628 
629 static umode_t hwmon_attributes_visible(struct kobject *kobj,
630 					struct attribute *attr, int index)
631 {
632 	struct device *dev = container_of(kobj, struct device, kobj);
633 	struct radeon_device *rdev = dev_get_drvdata(dev);
634 
635 	/* Skip limit attributes if DPM is not enabled */
636 	if (rdev->pm.pm_method != PM_METHOD_DPM &&
637 	    (attr == &sensor_dev_attr_temp1_crit.dev_attr.attr ||
638 	     attr == &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr))
639 		return 0;
640 
641 	return attr->mode;
642 }
643 
644 static const struct attribute_group hwmon_attrgroup = {
645 	.attrs = hwmon_attributes,
646 	.is_visible = hwmon_attributes_visible,
647 };
648 
649 static const struct attribute_group *hwmon_groups[] = {
650 	&hwmon_attrgroup,
651 	NULL
652 };
653 #endif
654 
655 static int radeon_hwmon_init(struct radeon_device *rdev)
656 {
657 	int err = 0;
658 
659 #ifndef __NetBSD__		/* XXX radeon hwmon */
660 	switch (rdev->pm.int_thermal_type) {
661 	case THERMAL_TYPE_RV6XX:
662 	case THERMAL_TYPE_RV770:
663 	case THERMAL_TYPE_EVERGREEN:
664 	case THERMAL_TYPE_NI:
665 	case THERMAL_TYPE_SUMO:
666 	case THERMAL_TYPE_SI:
667 	case THERMAL_TYPE_CI:
668 	case THERMAL_TYPE_KV:
669 		if (rdev->asic->pm.get_temperature == NULL)
670 			return err;
671 		rdev->pm.int_hwmon_dev = hwmon_device_register_with_groups(rdev->dev,
672 									   "radeon", rdev,
673 									   hwmon_groups);
674 		if (IS_ERR(rdev->pm.int_hwmon_dev)) {
675 			err = PTR_ERR(rdev->pm.int_hwmon_dev);
676 			dev_err(rdev->dev,
677 				"Unable to register hwmon device: %d\n", err);
678 		}
679 		break;
680 	default:
681 		break;
682 	}
683 #endif
684 
685 	return err;
686 }
687 
688 static void radeon_hwmon_fini(struct radeon_device *rdev)
689 {
690 #ifndef __NetBSD__		/* XXX radeon hwmon */
691 	if (rdev->pm.int_hwmon_dev)
692 		hwmon_device_unregister(rdev->pm.int_hwmon_dev);
693 #endif
694 }
695 
696 static void radeon_dpm_thermal_work_handler(struct work_struct *work)
697 {
698 	struct radeon_device *rdev =
699 		container_of(work, struct radeon_device,
700 			     pm.dpm.thermal.work);
701 	/* switch to the thermal state */
702 	enum radeon_pm_state_type dpm_state = POWER_STATE_TYPE_INTERNAL_THERMAL;
703 
704 	if (!rdev->pm.dpm_enabled)
705 		return;
706 
707 	if (rdev->asic->pm.get_temperature) {
708 		int temp = radeon_get_temperature(rdev);
709 
710 		if (temp < rdev->pm.dpm.thermal.min_temp)
711 			/* switch back the user state */
712 			dpm_state = rdev->pm.dpm.user_state;
713 	} else {
714 		if (rdev->pm.dpm.thermal.high_to_low)
715 			/* switch back the user state */
716 			dpm_state = rdev->pm.dpm.user_state;
717 	}
718 	mutex_lock(&rdev->pm.mutex);
719 	if (dpm_state == POWER_STATE_TYPE_INTERNAL_THERMAL)
720 		rdev->pm.dpm.thermal_active = true;
721 	else
722 		rdev->pm.dpm.thermal_active = false;
723 	rdev->pm.dpm.state = dpm_state;
724 	mutex_unlock(&rdev->pm.mutex);
725 
726 	radeon_pm_compute_clocks(rdev);
727 }
728 
729 static struct radeon_ps *radeon_dpm_pick_power_state(struct radeon_device *rdev,
730 						     enum radeon_pm_state_type dpm_state)
731 {
732 	int i;
733 	struct radeon_ps *ps;
734 	u32 ui_class;
735 	bool single_display = (rdev->pm.dpm.new_active_crtc_count < 2) ?
736 		true : false;
737 
738 	/* check if the vblank period is too short to adjust the mclk */
739 	if (single_display && rdev->asic->dpm.vblank_too_short) {
740 		if (radeon_dpm_vblank_too_short(rdev))
741 			single_display = false;
742 	}
743 
744 	/* certain older asics have a separare 3D performance state,
745 	 * so try that first if the user selected performance
746 	 */
747 	if (dpm_state == POWER_STATE_TYPE_PERFORMANCE)
748 		dpm_state = POWER_STATE_TYPE_INTERNAL_3DPERF;
749 	/* balanced states don't exist at the moment */
750 	if (dpm_state == POWER_STATE_TYPE_BALANCED)
751 		dpm_state = POWER_STATE_TYPE_PERFORMANCE;
752 
753 restart_search:
754 	/* Pick the best power state based on current conditions */
755 	for (i = 0; i < rdev->pm.dpm.num_ps; i++) {
756 		ps = &rdev->pm.dpm.ps[i];
757 		ui_class = ps->class & ATOM_PPLIB_CLASSIFICATION_UI_MASK;
758 		switch (dpm_state) {
759 		/* user states */
760 		case POWER_STATE_TYPE_BATTERY:
761 			if (ui_class == ATOM_PPLIB_CLASSIFICATION_UI_BATTERY) {
762 				if (ps->caps & ATOM_PPLIB_SINGLE_DISPLAY_ONLY) {
763 					if (single_display)
764 						return ps;
765 				} else
766 					return ps;
767 			}
768 			break;
769 		case POWER_STATE_TYPE_BALANCED:
770 			if (ui_class == ATOM_PPLIB_CLASSIFICATION_UI_BALANCED) {
771 				if (ps->caps & ATOM_PPLIB_SINGLE_DISPLAY_ONLY) {
772 					if (single_display)
773 						return ps;
774 				} else
775 					return ps;
776 			}
777 			break;
778 		case POWER_STATE_TYPE_PERFORMANCE:
779 			if (ui_class == ATOM_PPLIB_CLASSIFICATION_UI_PERFORMANCE) {
780 				if (ps->caps & ATOM_PPLIB_SINGLE_DISPLAY_ONLY) {
781 					if (single_display)
782 						return ps;
783 				} else
784 					return ps;
785 			}
786 			break;
787 		/* internal states */
788 		case POWER_STATE_TYPE_INTERNAL_UVD:
789 			if (rdev->pm.dpm.uvd_ps)
790 				return rdev->pm.dpm.uvd_ps;
791 			else
792 				break;
793 		case POWER_STATE_TYPE_INTERNAL_UVD_SD:
794 			if (ps->class & ATOM_PPLIB_CLASSIFICATION_SDSTATE)
795 				return ps;
796 			break;
797 		case POWER_STATE_TYPE_INTERNAL_UVD_HD:
798 			if (ps->class & ATOM_PPLIB_CLASSIFICATION_HDSTATE)
799 				return ps;
800 			break;
801 		case POWER_STATE_TYPE_INTERNAL_UVD_HD2:
802 			if (ps->class & ATOM_PPLIB_CLASSIFICATION_HD2STATE)
803 				return ps;
804 			break;
805 		case POWER_STATE_TYPE_INTERNAL_UVD_MVC:
806 			if (ps->class2 & ATOM_PPLIB_CLASSIFICATION2_MVC)
807 				return ps;
808 			break;
809 		case POWER_STATE_TYPE_INTERNAL_BOOT:
810 			return rdev->pm.dpm.boot_ps;
811 		case POWER_STATE_TYPE_INTERNAL_THERMAL:
812 			if (ps->class & ATOM_PPLIB_CLASSIFICATION_THERMAL)
813 				return ps;
814 			break;
815 		case POWER_STATE_TYPE_INTERNAL_ACPI:
816 			if (ps->class & ATOM_PPLIB_CLASSIFICATION_ACPI)
817 				return ps;
818 			break;
819 		case POWER_STATE_TYPE_INTERNAL_ULV:
820 			if (ps->class2 & ATOM_PPLIB_CLASSIFICATION2_ULV)
821 				return ps;
822 			break;
823 		case POWER_STATE_TYPE_INTERNAL_3DPERF:
824 			if (ps->class & ATOM_PPLIB_CLASSIFICATION_3DPERFORMANCE)
825 				return ps;
826 			break;
827 		default:
828 			break;
829 		}
830 	}
831 	/* use a fallback state if we didn't match */
832 	switch (dpm_state) {
833 	case POWER_STATE_TYPE_INTERNAL_UVD_SD:
834 		dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD;
835 		goto restart_search;
836 	case POWER_STATE_TYPE_INTERNAL_UVD_HD:
837 	case POWER_STATE_TYPE_INTERNAL_UVD_HD2:
838 	case POWER_STATE_TYPE_INTERNAL_UVD_MVC:
839 		if (rdev->pm.dpm.uvd_ps) {
840 			return rdev->pm.dpm.uvd_ps;
841 		} else {
842 			dpm_state = POWER_STATE_TYPE_PERFORMANCE;
843 			goto restart_search;
844 		}
845 	case POWER_STATE_TYPE_INTERNAL_THERMAL:
846 		dpm_state = POWER_STATE_TYPE_INTERNAL_ACPI;
847 		goto restart_search;
848 	case POWER_STATE_TYPE_INTERNAL_ACPI:
849 		dpm_state = POWER_STATE_TYPE_BATTERY;
850 		goto restart_search;
851 	case POWER_STATE_TYPE_BATTERY:
852 	case POWER_STATE_TYPE_BALANCED:
853 	case POWER_STATE_TYPE_INTERNAL_3DPERF:
854 		dpm_state = POWER_STATE_TYPE_PERFORMANCE;
855 		goto restart_search;
856 	default:
857 		break;
858 	}
859 
860 	return NULL;
861 }
862 
863 static void radeon_dpm_change_power_state_locked(struct radeon_device *rdev)
864 {
865 	int i;
866 	struct radeon_ps *ps;
867 	enum radeon_pm_state_type dpm_state;
868 	int ret;
869 
870 	/* if dpm init failed */
871 	if (!rdev->pm.dpm_enabled)
872 		return;
873 
874 	if (rdev->pm.dpm.user_state != rdev->pm.dpm.state) {
875 		/* add other state override checks here */
876 		if ((!rdev->pm.dpm.thermal_active) &&
877 		    (!rdev->pm.dpm.uvd_active))
878 			rdev->pm.dpm.state = rdev->pm.dpm.user_state;
879 	}
880 	dpm_state = rdev->pm.dpm.state;
881 
882 	ps = radeon_dpm_pick_power_state(rdev, dpm_state);
883 	if (ps)
884 		rdev->pm.dpm.requested_ps = ps;
885 	else
886 		return;
887 
888 	/* no need to reprogram if nothing changed unless we are on BTC+ */
889 	if (rdev->pm.dpm.current_ps == rdev->pm.dpm.requested_ps) {
890 		/* vce just modifies an existing state so force a change */
891 		if (ps->vce_active != rdev->pm.dpm.vce_active)
892 			goto force;
893 		if ((rdev->family < CHIP_BARTS) || (rdev->flags & RADEON_IS_IGP)) {
894 			/* for pre-BTC and APUs if the num crtcs changed but state is the same,
895 			 * all we need to do is update the display configuration.
896 			 */
897 			if (rdev->pm.dpm.new_active_crtcs != rdev->pm.dpm.current_active_crtcs) {
898 				/* update display watermarks based on new power state */
899 				radeon_bandwidth_update(rdev);
900 				/* update displays */
901 				radeon_dpm_display_configuration_changed(rdev);
902 				rdev->pm.dpm.current_active_crtcs = rdev->pm.dpm.new_active_crtcs;
903 				rdev->pm.dpm.current_active_crtc_count = rdev->pm.dpm.new_active_crtc_count;
904 			}
905 			return;
906 		} else {
907 			/* for BTC+ if the num crtcs hasn't changed and state is the same,
908 			 * nothing to do, if the num crtcs is > 1 and state is the same,
909 			 * update display configuration.
910 			 */
911 			if (rdev->pm.dpm.new_active_crtcs ==
912 			    rdev->pm.dpm.current_active_crtcs) {
913 				return;
914 			} else {
915 				if ((rdev->pm.dpm.current_active_crtc_count > 1) &&
916 				    (rdev->pm.dpm.new_active_crtc_count > 1)) {
917 					/* update display watermarks based on new power state */
918 					radeon_bandwidth_update(rdev);
919 					/* update displays */
920 					radeon_dpm_display_configuration_changed(rdev);
921 					rdev->pm.dpm.current_active_crtcs = rdev->pm.dpm.new_active_crtcs;
922 					rdev->pm.dpm.current_active_crtc_count = rdev->pm.dpm.new_active_crtc_count;
923 					return;
924 				}
925 			}
926 		}
927 	}
928 
929 force:
930 	if (radeon_dpm == 1) {
931 		printk("switching from power state:\n");
932 		radeon_dpm_print_power_state(rdev, rdev->pm.dpm.current_ps);
933 		printk("switching to power state:\n");
934 		radeon_dpm_print_power_state(rdev, rdev->pm.dpm.requested_ps);
935 	}
936 
937 	mutex_lock(&rdev->ddev->struct_mutex);
938 	down_write(&rdev->pm.mclk_lock);
939 	mutex_lock(&rdev->ring_lock);
940 
941 	/* update whether vce is active */
942 	ps->vce_active = rdev->pm.dpm.vce_active;
943 
944 	ret = radeon_dpm_pre_set_power_state(rdev);
945 	if (ret)
946 		goto done;
947 
948 	/* update display watermarks based on new power state */
949 	radeon_bandwidth_update(rdev);
950 	/* update displays */
951 	radeon_dpm_display_configuration_changed(rdev);
952 
953 	rdev->pm.dpm.current_active_crtcs = rdev->pm.dpm.new_active_crtcs;
954 	rdev->pm.dpm.current_active_crtc_count = rdev->pm.dpm.new_active_crtc_count;
955 
956 	/* wait for the rings to drain */
957 	for (i = 0; i < RADEON_NUM_RINGS; i++) {
958 		struct radeon_ring *ring = &rdev->ring[i];
959 		if (ring->ready)
960 			radeon_fence_wait_empty(rdev, i);
961 	}
962 
963 	/* program the new power state */
964 	radeon_dpm_set_power_state(rdev);
965 
966 	/* update current power state */
967 	rdev->pm.dpm.current_ps = rdev->pm.dpm.requested_ps;
968 
969 	radeon_dpm_post_set_power_state(rdev);
970 
971 	if (rdev->asic->dpm.force_performance_level) {
972 		if (rdev->pm.dpm.thermal_active) {
973 			enum radeon_dpm_forced_level level = rdev->pm.dpm.forced_level;
974 			/* force low perf level for thermal */
975 			radeon_dpm_force_performance_level(rdev, RADEON_DPM_FORCED_LEVEL_LOW);
976 			/* save the user's level */
977 			rdev->pm.dpm.forced_level = level;
978 		} else {
979 			/* otherwise, user selected level */
980 			radeon_dpm_force_performance_level(rdev, rdev->pm.dpm.forced_level);
981 		}
982 	}
983 
984 done:
985 	mutex_unlock(&rdev->ring_lock);
986 	up_write(&rdev->pm.mclk_lock);
987 	mutex_unlock(&rdev->ddev->struct_mutex);
988 }
989 
990 void radeon_dpm_enable_uvd(struct radeon_device *rdev, bool enable)
991 {
992 	enum radeon_pm_state_type dpm_state;
993 
994 	if (rdev->asic->dpm.powergate_uvd) {
995 		mutex_lock(&rdev->pm.mutex);
996 		/* don't powergate anything if we
997 		   have active but pause streams */
998 		enable |= rdev->pm.dpm.sd > 0;
999 		enable |= rdev->pm.dpm.hd > 0;
1000 		/* enable/disable UVD */
1001 		radeon_dpm_powergate_uvd(rdev, !enable);
1002 		mutex_unlock(&rdev->pm.mutex);
1003 	} else {
1004 		if (enable) {
1005 			mutex_lock(&rdev->pm.mutex);
1006 			rdev->pm.dpm.uvd_active = true;
1007 			if ((rdev->pm.dpm.sd == 1) && (rdev->pm.dpm.hd == 0))
1008 				dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_SD;
1009 			else if ((rdev->pm.dpm.sd == 2) && (rdev->pm.dpm.hd == 0))
1010 				dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD;
1011 			else if ((rdev->pm.dpm.sd == 0) && (rdev->pm.dpm.hd == 1))
1012 				dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD;
1013 			else if ((rdev->pm.dpm.sd == 0) && (rdev->pm.dpm.hd == 2))
1014 				dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD2;
1015 			else
1016 				dpm_state = POWER_STATE_TYPE_INTERNAL_UVD;
1017 			rdev->pm.dpm.state = dpm_state;
1018 			mutex_unlock(&rdev->pm.mutex);
1019 		} else {
1020 			mutex_lock(&rdev->pm.mutex);
1021 			rdev->pm.dpm.uvd_active = false;
1022 			mutex_unlock(&rdev->pm.mutex);
1023 		}
1024 
1025 		radeon_pm_compute_clocks(rdev);
1026 	}
1027 }
1028 
1029 void radeon_dpm_enable_vce(struct radeon_device *rdev, bool enable)
1030 {
1031 	if (enable) {
1032 		mutex_lock(&rdev->pm.mutex);
1033 		rdev->pm.dpm.vce_active = true;
1034 		/* XXX select vce level based on ring/task */
1035 		rdev->pm.dpm.vce_level = RADEON_VCE_LEVEL_AC_ALL;
1036 		mutex_unlock(&rdev->pm.mutex);
1037 	} else {
1038 		mutex_lock(&rdev->pm.mutex);
1039 		rdev->pm.dpm.vce_active = false;
1040 		mutex_unlock(&rdev->pm.mutex);
1041 	}
1042 
1043 	radeon_pm_compute_clocks(rdev);
1044 }
1045 
1046 static void radeon_pm_suspend_old(struct radeon_device *rdev)
1047 {
1048 	mutex_lock(&rdev->pm.mutex);
1049 	if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
1050 		if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE)
1051 			rdev->pm.dynpm_state = DYNPM_STATE_SUSPENDED;
1052 	}
1053 	mutex_unlock(&rdev->pm.mutex);
1054 
1055 	cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
1056 }
1057 
1058 static void radeon_pm_suspend_dpm(struct radeon_device *rdev)
1059 {
1060 	mutex_lock(&rdev->pm.mutex);
1061 	/* disable dpm */
1062 	radeon_dpm_disable(rdev);
1063 	/* reset the power state */
1064 	rdev->pm.dpm.current_ps = rdev->pm.dpm.requested_ps = rdev->pm.dpm.boot_ps;
1065 	rdev->pm.dpm_enabled = false;
1066 	mutex_unlock(&rdev->pm.mutex);
1067 }
1068 
1069 void radeon_pm_suspend(struct radeon_device *rdev)
1070 {
1071 	if (rdev->pm.pm_method == PM_METHOD_DPM)
1072 		radeon_pm_suspend_dpm(rdev);
1073 	else
1074 		radeon_pm_suspend_old(rdev);
1075 }
1076 
1077 static void radeon_pm_resume_old(struct radeon_device *rdev)
1078 {
1079 	/* set up the default clocks if the MC ucode is loaded */
1080 	if ((rdev->family >= CHIP_BARTS) &&
1081 	    (rdev->family <= CHIP_CAYMAN) &&
1082 	    rdev->mc_fw) {
1083 		if (rdev->pm.default_vddc)
1084 			radeon_atom_set_voltage(rdev, rdev->pm.default_vddc,
1085 						SET_VOLTAGE_TYPE_ASIC_VDDC);
1086 		if (rdev->pm.default_vddci)
1087 			radeon_atom_set_voltage(rdev, rdev->pm.default_vddci,
1088 						SET_VOLTAGE_TYPE_ASIC_VDDCI);
1089 		if (rdev->pm.default_sclk)
1090 			radeon_set_engine_clock(rdev, rdev->pm.default_sclk);
1091 		if (rdev->pm.default_mclk)
1092 			radeon_set_memory_clock(rdev, rdev->pm.default_mclk);
1093 	}
1094 	/* asic init will reset the default power state */
1095 	mutex_lock(&rdev->pm.mutex);
1096 	rdev->pm.current_power_state_index = rdev->pm.default_power_state_index;
1097 	rdev->pm.current_clock_mode_index = 0;
1098 	rdev->pm.current_sclk = rdev->pm.default_sclk;
1099 	rdev->pm.current_mclk = rdev->pm.default_mclk;
1100 	if (rdev->pm.power_state) {
1101 		rdev->pm.current_vddc = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage;
1102 		rdev->pm.current_vddci = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.vddci;
1103 	}
1104 	if (rdev->pm.pm_method == PM_METHOD_DYNPM
1105 	    && rdev->pm.dynpm_state == DYNPM_STATE_SUSPENDED) {
1106 		rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
1107 		schedule_delayed_work(&rdev->pm.dynpm_idle_work,
1108 				      msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
1109 	}
1110 	mutex_unlock(&rdev->pm.mutex);
1111 	radeon_pm_compute_clocks(rdev);
1112 }
1113 
1114 static void radeon_pm_resume_dpm(struct radeon_device *rdev)
1115 {
1116 	int ret;
1117 
1118 	/* asic init will reset to the boot state */
1119 	mutex_lock(&rdev->pm.mutex);
1120 	rdev->pm.dpm.current_ps = rdev->pm.dpm.requested_ps = rdev->pm.dpm.boot_ps;
1121 	radeon_dpm_setup_asic(rdev);
1122 	ret = radeon_dpm_enable(rdev);
1123 	mutex_unlock(&rdev->pm.mutex);
1124 	if (ret)
1125 		goto dpm_resume_fail;
1126 	rdev->pm.dpm_enabled = true;
1127 	return;
1128 
1129 dpm_resume_fail:
1130 	DRM_ERROR("radeon: dpm resume failed\n");
1131 	if ((rdev->family >= CHIP_BARTS) &&
1132 	    (rdev->family <= CHIP_CAYMAN) &&
1133 	    rdev->mc_fw) {
1134 		if (rdev->pm.default_vddc)
1135 			radeon_atom_set_voltage(rdev, rdev->pm.default_vddc,
1136 						SET_VOLTAGE_TYPE_ASIC_VDDC);
1137 		if (rdev->pm.default_vddci)
1138 			radeon_atom_set_voltage(rdev, rdev->pm.default_vddci,
1139 						SET_VOLTAGE_TYPE_ASIC_VDDCI);
1140 		if (rdev->pm.default_sclk)
1141 			radeon_set_engine_clock(rdev, rdev->pm.default_sclk);
1142 		if (rdev->pm.default_mclk)
1143 			radeon_set_memory_clock(rdev, rdev->pm.default_mclk);
1144 	}
1145 }
1146 
1147 void radeon_pm_resume(struct radeon_device *rdev)
1148 {
1149 	if (rdev->pm.pm_method == PM_METHOD_DPM)
1150 		radeon_pm_resume_dpm(rdev);
1151 	else
1152 		radeon_pm_resume_old(rdev);
1153 }
1154 
1155 static int radeon_pm_init_old(struct radeon_device *rdev)
1156 {
1157 	int ret;
1158 
1159 	rdev->pm.profile = PM_PROFILE_DEFAULT;
1160 	rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
1161 	rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
1162 	rdev->pm.dynpm_can_upclock = true;
1163 	rdev->pm.dynpm_can_downclock = true;
1164 	rdev->pm.default_sclk = rdev->clock.default_sclk;
1165 	rdev->pm.default_mclk = rdev->clock.default_mclk;
1166 	rdev->pm.current_sclk = rdev->clock.default_sclk;
1167 	rdev->pm.current_mclk = rdev->clock.default_mclk;
1168 	rdev->pm.int_thermal_type = THERMAL_TYPE_NONE;
1169 
1170 	if (rdev->bios) {
1171 		if (rdev->is_atom_bios)
1172 			radeon_atombios_get_power_modes(rdev);
1173 		else
1174 			radeon_combios_get_power_modes(rdev);
1175 		radeon_pm_print_states(rdev);
1176 		radeon_pm_init_profile(rdev);
1177 		/* set up the default clocks if the MC ucode is loaded */
1178 		if ((rdev->family >= CHIP_BARTS) &&
1179 		    (rdev->family <= CHIP_CAYMAN) &&
1180 		    rdev->mc_fw) {
1181 			if (rdev->pm.default_vddc)
1182 				radeon_atom_set_voltage(rdev, rdev->pm.default_vddc,
1183 							SET_VOLTAGE_TYPE_ASIC_VDDC);
1184 			if (rdev->pm.default_vddci)
1185 				radeon_atom_set_voltage(rdev, rdev->pm.default_vddci,
1186 							SET_VOLTAGE_TYPE_ASIC_VDDCI);
1187 			if (rdev->pm.default_sclk)
1188 				radeon_set_engine_clock(rdev, rdev->pm.default_sclk);
1189 			if (rdev->pm.default_mclk)
1190 				radeon_set_memory_clock(rdev, rdev->pm.default_mclk);
1191 		}
1192 	}
1193 
1194 	/* set up the internal thermal sensor if applicable */
1195 	ret = radeon_hwmon_init(rdev);
1196 	if (ret)
1197 		return ret;
1198 
1199 	INIT_DELAYED_WORK(&rdev->pm.dynpm_idle_work, radeon_dynpm_idle_work_handler);
1200 
1201 #ifndef __NetBSD__		/* XXX radeon power */
1202 	if (rdev->pm.num_power_states > 1) {
1203 		/* where's the best place to put these? */
1204 		ret = device_create_file(rdev->dev, &dev_attr_power_profile);
1205 		if (ret)
1206 			DRM_ERROR("failed to create device file for power profile\n");
1207 		ret = device_create_file(rdev->dev, &dev_attr_power_method);
1208 		if (ret)
1209 			DRM_ERROR("failed to create device file for power method\n");
1210 
1211 		if (radeon_debugfs_pm_init(rdev)) {
1212 			DRM_ERROR("Failed to register debugfs file for PM!\n");
1213 		}
1214 
1215 		DRM_INFO("radeon: power management initialized\n");
1216 	}
1217 #endif
1218 
1219 	return 0;
1220 }
1221 
1222 static void radeon_dpm_print_power_states(struct radeon_device *rdev)
1223 {
1224 	int i;
1225 
1226 	for (i = 0; i < rdev->pm.dpm.num_ps; i++) {
1227 		printk("== power state %d ==\n", i);
1228 		radeon_dpm_print_power_state(rdev, &rdev->pm.dpm.ps[i]);
1229 	}
1230 }
1231 
1232 static int radeon_pm_init_dpm(struct radeon_device *rdev)
1233 {
1234 	int ret;
1235 
1236 	/* default to balanced state */
1237 	rdev->pm.dpm.state = POWER_STATE_TYPE_BALANCED;
1238 	rdev->pm.dpm.user_state = POWER_STATE_TYPE_BALANCED;
1239 	rdev->pm.dpm.forced_level = RADEON_DPM_FORCED_LEVEL_AUTO;
1240 	rdev->pm.default_sclk = rdev->clock.default_sclk;
1241 	rdev->pm.default_mclk = rdev->clock.default_mclk;
1242 	rdev->pm.current_sclk = rdev->clock.default_sclk;
1243 	rdev->pm.current_mclk = rdev->clock.default_mclk;
1244 	rdev->pm.int_thermal_type = THERMAL_TYPE_NONE;
1245 
1246 	if (rdev->bios && rdev->is_atom_bios)
1247 		radeon_atombios_get_power_modes(rdev);
1248 	else
1249 		return -EINVAL;
1250 
1251 	/* set up the internal thermal sensor if applicable */
1252 	ret = radeon_hwmon_init(rdev);
1253 	if (ret)
1254 		return ret;
1255 
1256 	INIT_WORK(&rdev->pm.dpm.thermal.work, radeon_dpm_thermal_work_handler);
1257 	mutex_lock(&rdev->pm.mutex);
1258 	radeon_dpm_init(rdev);
1259 	rdev->pm.dpm.current_ps = rdev->pm.dpm.requested_ps = rdev->pm.dpm.boot_ps;
1260 	if (radeon_dpm == 1)
1261 		radeon_dpm_print_power_states(rdev);
1262 	radeon_dpm_setup_asic(rdev);
1263 	ret = radeon_dpm_enable(rdev);
1264 	mutex_unlock(&rdev->pm.mutex);
1265 	if (ret)
1266 		goto dpm_failed;
1267 	rdev->pm.dpm_enabled = true;
1268 
1269 #ifndef __NetBSD__		/* XXX radeon power */
1270 	ret = device_create_file(rdev->dev, &dev_attr_power_dpm_state);
1271 	if (ret)
1272 		DRM_ERROR("failed to create device file for dpm state\n");
1273 	ret = device_create_file(rdev->dev, &dev_attr_power_dpm_force_performance_level);
1274 	if (ret)
1275 		DRM_ERROR("failed to create device file for dpm state\n");
1276 	/* XXX: these are noops for dpm but are here for backwards compat */
1277 	ret = device_create_file(rdev->dev, &dev_attr_power_profile);
1278 	if (ret)
1279 		DRM_ERROR("failed to create device file for power profile\n");
1280 	ret = device_create_file(rdev->dev, &dev_attr_power_method);
1281 	if (ret)
1282 		DRM_ERROR("failed to create device file for power method\n");
1283 #endif
1284 
1285 	if (radeon_debugfs_pm_init(rdev)) {
1286 		DRM_ERROR("Failed to register debugfs file for dpm!\n");
1287 	}
1288 
1289 	DRM_INFO("radeon: dpm initialized\n");
1290 
1291 	return 0;
1292 
1293 dpm_failed:
1294 	rdev->pm.dpm_enabled = false;
1295 	if ((rdev->family >= CHIP_BARTS) &&
1296 	    (rdev->family <= CHIP_CAYMAN) &&
1297 	    rdev->mc_fw) {
1298 		if (rdev->pm.default_vddc)
1299 			radeon_atom_set_voltage(rdev, rdev->pm.default_vddc,
1300 						SET_VOLTAGE_TYPE_ASIC_VDDC);
1301 		if (rdev->pm.default_vddci)
1302 			radeon_atom_set_voltage(rdev, rdev->pm.default_vddci,
1303 						SET_VOLTAGE_TYPE_ASIC_VDDCI);
1304 		if (rdev->pm.default_sclk)
1305 			radeon_set_engine_clock(rdev, rdev->pm.default_sclk);
1306 		if (rdev->pm.default_mclk)
1307 			radeon_set_memory_clock(rdev, rdev->pm.default_mclk);
1308 	}
1309 	DRM_ERROR("radeon: dpm initialization failed\n");
1310 	return ret;
1311 }
1312 
1313 int radeon_pm_init(struct radeon_device *rdev)
1314 {
1315 	/* enable dpm on rv6xx+ */
1316 	switch (rdev->family) {
1317 	case CHIP_RV610:
1318 	case CHIP_RV630:
1319 	case CHIP_RV620:
1320 	case CHIP_RV635:
1321 	case CHIP_RV670:
1322 	case CHIP_RS780:
1323 	case CHIP_RS880:
1324 	case CHIP_RV770:
1325 	case CHIP_BARTS:
1326 	case CHIP_TURKS:
1327 	case CHIP_CAICOS:
1328 	case CHIP_CAYMAN:
1329 		/* DPM requires the RLC, RV770+ dGPU requires SMC */
1330 		if (!rdev->rlc_fw)
1331 			rdev->pm.pm_method = PM_METHOD_PROFILE;
1332 		else if ((rdev->family >= CHIP_RV770) &&
1333 			 (!(rdev->flags & RADEON_IS_IGP)) &&
1334 			 (!rdev->smc_fw))
1335 			rdev->pm.pm_method = PM_METHOD_PROFILE;
1336 		else if (radeon_dpm == 1)
1337 			rdev->pm.pm_method = PM_METHOD_DPM;
1338 		else
1339 			rdev->pm.pm_method = PM_METHOD_PROFILE;
1340 		break;
1341 	case CHIP_RV730:
1342 	case CHIP_RV710:
1343 	case CHIP_RV740:
1344 	case CHIP_CEDAR:
1345 	case CHIP_REDWOOD:
1346 	case CHIP_JUNIPER:
1347 	case CHIP_CYPRESS:
1348 	case CHIP_HEMLOCK:
1349 	case CHIP_PALM:
1350 	case CHIP_SUMO:
1351 	case CHIP_SUMO2:
1352 	case CHIP_ARUBA:
1353 	case CHIP_TAHITI:
1354 	case CHIP_PITCAIRN:
1355 	case CHIP_VERDE:
1356 	case CHIP_OLAND:
1357 	case CHIP_HAINAN:
1358 	case CHIP_BONAIRE:
1359 	case CHIP_KABINI:
1360 	case CHIP_KAVERI:
1361 	case CHIP_HAWAII:
1362 	case CHIP_MULLINS:
1363 		/* DPM requires the RLC, RV770+ dGPU requires SMC */
1364 		if (!rdev->rlc_fw)
1365 			rdev->pm.pm_method = PM_METHOD_PROFILE;
1366 		else if ((rdev->family >= CHIP_RV770) &&
1367 			 (!(rdev->flags & RADEON_IS_IGP)) &&
1368 			 (!rdev->smc_fw))
1369 			rdev->pm.pm_method = PM_METHOD_PROFILE;
1370 		else if (radeon_dpm == 0)
1371 			rdev->pm.pm_method = PM_METHOD_PROFILE;
1372 		else
1373 			rdev->pm.pm_method = PM_METHOD_DPM;
1374 		break;
1375 	default:
1376 		/* default to profile method */
1377 		rdev->pm.pm_method = PM_METHOD_PROFILE;
1378 		break;
1379 	}
1380 
1381 	if (rdev->pm.pm_method == PM_METHOD_DPM)
1382 		return radeon_pm_init_dpm(rdev);
1383 	else
1384 		return radeon_pm_init_old(rdev);
1385 }
1386 
1387 int radeon_pm_late_init(struct radeon_device *rdev)
1388 {
1389 	int ret = 0;
1390 
1391 	if (rdev->pm.pm_method == PM_METHOD_DPM) {
1392 		mutex_lock(&rdev->pm.mutex);
1393 		ret = radeon_dpm_late_enable(rdev);
1394 		mutex_unlock(&rdev->pm.mutex);
1395 	}
1396 	return ret;
1397 }
1398 
1399 static void radeon_pm_fini_old(struct radeon_device *rdev)
1400 {
1401 	if (rdev->pm.num_power_states > 1) {
1402 		mutex_lock(&rdev->pm.mutex);
1403 		if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
1404 			rdev->pm.profile = PM_PROFILE_DEFAULT;
1405 			radeon_pm_update_profile(rdev);
1406 			radeon_pm_set_clocks(rdev);
1407 		} else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
1408 			/* reset default clocks */
1409 			rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
1410 			rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
1411 			radeon_pm_set_clocks(rdev);
1412 		}
1413 		mutex_unlock(&rdev->pm.mutex);
1414 
1415 		cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
1416 
1417 #ifndef __NetBSD__		/* XXX radeon power */
1418 		device_remove_file(rdev->dev, &dev_attr_power_profile);
1419 		device_remove_file(rdev->dev, &dev_attr_power_method);
1420 #endif
1421 	}
1422 
1423 	radeon_hwmon_fini(rdev);
1424 
1425 	if (rdev->pm.power_state)
1426 		kfree(rdev->pm.power_state);
1427 }
1428 
1429 static void radeon_pm_fini_dpm(struct radeon_device *rdev)
1430 {
1431 	if (rdev->pm.num_power_states > 1) {
1432 		mutex_lock(&rdev->pm.mutex);
1433 		radeon_dpm_disable(rdev);
1434 		mutex_unlock(&rdev->pm.mutex);
1435 
1436 #ifndef __NetBSD__		/* XXX radeon power */
1437 		device_remove_file(rdev->dev, &dev_attr_power_dpm_state);
1438 		device_remove_file(rdev->dev, &dev_attr_power_dpm_force_performance_level);
1439 		/* XXX backwards compat */
1440 		device_remove_file(rdev->dev, &dev_attr_power_profile);
1441 		device_remove_file(rdev->dev, &dev_attr_power_method);
1442 #endif
1443 	}
1444 	radeon_dpm_fini(rdev);
1445 
1446 	radeon_hwmon_fini(rdev);
1447 
1448 	if (rdev->pm.power_state)
1449 		kfree(rdev->pm.power_state);
1450 }
1451 
1452 void radeon_pm_fini(struct radeon_device *rdev)
1453 {
1454 	if (rdev->pm.pm_method == PM_METHOD_DPM)
1455 		radeon_pm_fini_dpm(rdev);
1456 	else
1457 		radeon_pm_fini_old(rdev);
1458 }
1459 
1460 static void radeon_pm_compute_clocks_old(struct radeon_device *rdev)
1461 {
1462 	struct drm_device *ddev = rdev->ddev;
1463 	struct drm_crtc *crtc;
1464 	struct radeon_crtc *radeon_crtc;
1465 
1466 	if (rdev->pm.num_power_states < 2)
1467 		return;
1468 
1469 	mutex_lock(&rdev->pm.mutex);
1470 
1471 	rdev->pm.active_crtcs = 0;
1472 	rdev->pm.active_crtc_count = 0;
1473 	if (rdev->num_crtc && rdev->mode_info.mode_config_initialized) {
1474 		list_for_each_entry(crtc,
1475 				    &ddev->mode_config.crtc_list, head) {
1476 			radeon_crtc = to_radeon_crtc(crtc);
1477 			if (radeon_crtc->enabled) {
1478 				rdev->pm.active_crtcs |= (1 << radeon_crtc->crtc_id);
1479 				rdev->pm.active_crtc_count++;
1480 			}
1481 		}
1482 	}
1483 
1484 	if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
1485 		radeon_pm_update_profile(rdev);
1486 		radeon_pm_set_clocks(rdev);
1487 	} else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
1488 		if (rdev->pm.dynpm_state != DYNPM_STATE_DISABLED) {
1489 			if (rdev->pm.active_crtc_count > 1) {
1490 				if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) {
1491 					cancel_delayed_work(&rdev->pm.dynpm_idle_work);
1492 
1493 					rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;
1494 					rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
1495 					radeon_pm_get_dynpm_state(rdev);
1496 					radeon_pm_set_clocks(rdev);
1497 
1498 					DRM_DEBUG_DRIVER("radeon: dynamic power management deactivated\n");
1499 				}
1500 			} else if (rdev->pm.active_crtc_count == 1) {
1501 				/* TODO: Increase clocks if needed for current mode */
1502 
1503 				if (rdev->pm.dynpm_state == DYNPM_STATE_MINIMUM) {
1504 					rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
1505 					rdev->pm.dynpm_planned_action = DYNPM_ACTION_UPCLOCK;
1506 					radeon_pm_get_dynpm_state(rdev);
1507 					radeon_pm_set_clocks(rdev);
1508 
1509 					schedule_delayed_work(&rdev->pm.dynpm_idle_work,
1510 							      msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
1511 				} else if (rdev->pm.dynpm_state == DYNPM_STATE_PAUSED) {
1512 					rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
1513 					schedule_delayed_work(&rdev->pm.dynpm_idle_work,
1514 							      msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
1515 					DRM_DEBUG_DRIVER("radeon: dynamic power management activated\n");
1516 				}
1517 			} else { /* count == 0 */
1518 				if (rdev->pm.dynpm_state != DYNPM_STATE_MINIMUM) {
1519 					cancel_delayed_work(&rdev->pm.dynpm_idle_work);
1520 
1521 					rdev->pm.dynpm_state = DYNPM_STATE_MINIMUM;
1522 					rdev->pm.dynpm_planned_action = DYNPM_ACTION_MINIMUM;
1523 					radeon_pm_get_dynpm_state(rdev);
1524 					radeon_pm_set_clocks(rdev);
1525 				}
1526 			}
1527 		}
1528 	}
1529 
1530 	mutex_unlock(&rdev->pm.mutex);
1531 }
1532 
1533 static void radeon_pm_compute_clocks_dpm(struct radeon_device *rdev)
1534 {
1535 	struct drm_device *ddev = rdev->ddev;
1536 	struct drm_crtc *crtc;
1537 	struct radeon_crtc *radeon_crtc;
1538 
1539 	if (!rdev->pm.dpm_enabled)
1540 		return;
1541 
1542 	mutex_lock(&rdev->pm.mutex);
1543 
1544 	/* update active crtc counts */
1545 	rdev->pm.dpm.new_active_crtcs = 0;
1546 	rdev->pm.dpm.new_active_crtc_count = 0;
1547 	if (rdev->num_crtc && rdev->mode_info.mode_config_initialized) {
1548 		list_for_each_entry(crtc,
1549 				    &ddev->mode_config.crtc_list, head) {
1550 			radeon_crtc = to_radeon_crtc(crtc);
1551 			if (crtc->enabled) {
1552 				rdev->pm.dpm.new_active_crtcs |= (1 << radeon_crtc->crtc_id);
1553 				rdev->pm.dpm.new_active_crtc_count++;
1554 			}
1555 		}
1556 	}
1557 
1558 	/* update battery/ac status */
1559 	if (power_supply_is_system_supplied() > 0)
1560 		rdev->pm.dpm.ac_power = true;
1561 	else
1562 		rdev->pm.dpm.ac_power = false;
1563 
1564 	radeon_dpm_change_power_state_locked(rdev);
1565 
1566 	mutex_unlock(&rdev->pm.mutex);
1567 
1568 }
1569 
1570 void radeon_pm_compute_clocks(struct radeon_device *rdev)
1571 {
1572 	if (rdev->pm.pm_method == PM_METHOD_DPM)
1573 		radeon_pm_compute_clocks_dpm(rdev);
1574 	else
1575 		radeon_pm_compute_clocks_old(rdev);
1576 }
1577 
1578 static bool radeon_pm_in_vbl(struct radeon_device *rdev)
1579 {
1580 	int  crtc, vpos, hpos, vbl_status;
1581 	bool in_vbl = true;
1582 
1583 	/* Iterate over all active crtc's. All crtc's must be in vblank,
1584 	 * otherwise return in_vbl == false.
1585 	 */
1586 	for (crtc = 0; (crtc < rdev->num_crtc) && in_vbl; crtc++) {
1587 		if (rdev->pm.active_crtcs & (1 << crtc)) {
1588 			vbl_status = radeon_get_crtc_scanoutpos(rdev->ddev, crtc, 0, &vpos, &hpos, NULL, NULL);
1589 			if ((vbl_status & DRM_SCANOUTPOS_VALID) &&
1590 			    !(vbl_status & DRM_SCANOUTPOS_INVBL))
1591 				in_vbl = false;
1592 		}
1593 	}
1594 
1595 	return in_vbl;
1596 }
1597 
1598 static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish)
1599 {
1600 	u32 stat_crtc = 0;
1601 	bool in_vbl = radeon_pm_in_vbl(rdev);
1602 
1603 	if (in_vbl == false)
1604 		DRM_DEBUG_DRIVER("not in vbl for pm change %08x at %s\n", stat_crtc,
1605 			 finish ? "exit" : "entry");
1606 	return in_vbl;
1607 }
1608 
1609 static void radeon_dynpm_idle_work_handler(struct work_struct *work)
1610 {
1611 	struct radeon_device *rdev;
1612 	int resched;
1613 	rdev = container_of(work, struct radeon_device,
1614 				pm.dynpm_idle_work.work);
1615 
1616 	resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev);
1617 	mutex_lock(&rdev->pm.mutex);
1618 	if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) {
1619 		int not_processed = 0;
1620 		int i;
1621 
1622 		for (i = 0; i < RADEON_NUM_RINGS; ++i) {
1623 			struct radeon_ring *ring = &rdev->ring[i];
1624 
1625 			if (ring->ready) {
1626 				not_processed += radeon_fence_count_emitted(rdev, i);
1627 				if (not_processed >= 3)
1628 					break;
1629 			}
1630 		}
1631 
1632 		if (not_processed >= 3) { /* should upclock */
1633 			if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_DOWNCLOCK) {
1634 				rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
1635 			} else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE &&
1636 				   rdev->pm.dynpm_can_upclock) {
1637 				rdev->pm.dynpm_planned_action =
1638 					DYNPM_ACTION_UPCLOCK;
1639 				rdev->pm.dynpm_action_timeout = jiffies +
1640 				msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
1641 			}
1642 		} else if (not_processed == 0) { /* should downclock */
1643 			if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_UPCLOCK) {
1644 				rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
1645 			} else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE &&
1646 				   rdev->pm.dynpm_can_downclock) {
1647 				rdev->pm.dynpm_planned_action =
1648 					DYNPM_ACTION_DOWNCLOCK;
1649 				rdev->pm.dynpm_action_timeout = jiffies +
1650 				msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
1651 			}
1652 		}
1653 
1654 		/* Note, radeon_pm_set_clocks is called with static_switch set
1655 		 * to false since we want to wait for vbl to avoid flicker.
1656 		 */
1657 		if (rdev->pm.dynpm_planned_action != DYNPM_ACTION_NONE &&
1658 		    jiffies > rdev->pm.dynpm_action_timeout) {
1659 			radeon_pm_get_dynpm_state(rdev);
1660 			radeon_pm_set_clocks(rdev);
1661 		}
1662 
1663 		schedule_delayed_work(&rdev->pm.dynpm_idle_work,
1664 				      msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
1665 	}
1666 	mutex_unlock(&rdev->pm.mutex);
1667 	ttm_bo_unlock_delayed_workqueue(&rdev->mman.bdev, resched);
1668 }
1669 
1670 /*
1671  * Debugfs info
1672  */
1673 #if defined(CONFIG_DEBUG_FS)
1674 
1675 static int radeon_debugfs_pm_info(struct seq_file *m, void *data)
1676 {
1677 	struct drm_info_node *node = (struct drm_info_node *) m->private;
1678 	struct drm_device *dev = node->minor->dev;
1679 	struct radeon_device *rdev = dev->dev_private;
1680 	struct drm_device *ddev = rdev->ddev;
1681 
1682 	if  ((rdev->flags & RADEON_IS_PX) &&
1683 	     (ddev->switch_power_state != DRM_SWITCH_POWER_ON)) {
1684 		seq_printf(m, "PX asic powered off\n");
1685 	} else if (rdev->pm.dpm_enabled) {
1686 		mutex_lock(&rdev->pm.mutex);
1687 		if (rdev->asic->dpm.debugfs_print_current_performance_level)
1688 			radeon_dpm_debugfs_print_current_performance_level(rdev, m);
1689 		else
1690 			seq_printf(m, "Debugfs support not implemented for this asic\n");
1691 		mutex_unlock(&rdev->pm.mutex);
1692 	} else {
1693 		seq_printf(m, "default engine clock: %u0 kHz\n", rdev->pm.default_sclk);
1694 		/* radeon_get_engine_clock is not reliable on APUs so just print the current clock */
1695 		if ((rdev->family >= CHIP_PALM) && (rdev->flags & RADEON_IS_IGP))
1696 			seq_printf(m, "current engine clock: %u0 kHz\n", rdev->pm.current_sclk);
1697 		else
1698 			seq_printf(m, "current engine clock: %u0 kHz\n", radeon_get_engine_clock(rdev));
1699 		seq_printf(m, "default memory clock: %u0 kHz\n", rdev->pm.default_mclk);
1700 		if (rdev->asic->pm.get_memory_clock)
1701 			seq_printf(m, "current memory clock: %u0 kHz\n", radeon_get_memory_clock(rdev));
1702 		if (rdev->pm.current_vddc)
1703 			seq_printf(m, "voltage: %u mV\n", rdev->pm.current_vddc);
1704 		if (rdev->asic->pm.get_pcie_lanes)
1705 			seq_printf(m, "PCIE lanes: %d\n", radeon_get_pcie_lanes(rdev));
1706 	}
1707 
1708 	return 0;
1709 }
1710 
1711 static struct drm_info_list radeon_pm_info_list[] = {
1712 	{"radeon_pm_info", radeon_debugfs_pm_info, 0, NULL},
1713 };
1714 #endif
1715 
1716 static int radeon_debugfs_pm_init(struct radeon_device *rdev)
1717 {
1718 #if defined(CONFIG_DEBUG_FS)
1719 	return radeon_debugfs_add_files(rdev, radeon_pm_info_list, ARRAY_SIZE(radeon_pm_info_list));
1720 #else
1721 	return 0;
1722 #endif
1723 }
1724