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 
24 #include <linux/hwmon-sysfs.h>
25 #include <linux/hwmon.h>
26 #include <linux/pci.h>
27 #include <linux/power_supply.h>
28 
29 #include <drm/drm_vblank.h>
30 
31 #include "atom.h"
32 #include "avivod.h"
33 #include "r600_dpm.h"
34 #include "radeon.h"
35 #include "radeon_pm.h"
36 
37 #define RADEON_IDLE_LOOP_MS 100
38 #define RADEON_RECLOCK_DELAY_MS 200
39 #define RADEON_WAIT_VBLANK_TIMEOUT 200
40 
41 static const char *radeon_pm_state_type_name[5] = {
42 	"",
43 	"Powersave",
44 	"Battery",
45 	"Balanced",
46 	"Performance",
47 };
48 
49 static void radeon_dynpm_idle_work_handler(struct work_struct *work);
50 static void radeon_debugfs_pm_init(struct radeon_device *rdev);
51 static bool radeon_pm_in_vbl(struct radeon_device *rdev);
52 static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish);
53 static void radeon_pm_update_profile(struct radeon_device *rdev);
54 static void radeon_pm_set_clocks(struct radeon_device *rdev);
55 
radeon_pm_get_type_index(struct radeon_device * rdev,enum radeon_pm_state_type ps_type,int instance)56 int radeon_pm_get_type_index(struct radeon_device *rdev,
57 			     enum radeon_pm_state_type ps_type,
58 			     int instance)
59 {
60 	int i;
61 	int found_instance = -1;
62 
63 	for (i = 0; i < rdev->pm.num_power_states; i++) {
64 		if (rdev->pm.power_state[i].type == ps_type) {
65 			found_instance++;
66 			if (found_instance == instance)
67 				return i;
68 		}
69 	}
70 	/* return default if no match */
71 	return rdev->pm.default_power_state_index;
72 }
73 
radeon_pm_acpi_event_handler(struct radeon_device * rdev)74 void radeon_pm_acpi_event_handler(struct radeon_device *rdev)
75 {
76 	if ((rdev->pm.pm_method == PM_METHOD_DPM) && rdev->pm.dpm_enabled) {
77 		mutex_lock(&rdev->pm.mutex);
78 		if (power_supply_is_system_supplied() > 0)
79 			rdev->pm.dpm.ac_power = true;
80 		else
81 			rdev->pm.dpm.ac_power = false;
82 		if (rdev->family == CHIP_ARUBA) {
83 			if (rdev->asic->dpm.enable_bapm)
84 				radeon_dpm_enable_bapm(rdev, rdev->pm.dpm.ac_power);
85 		}
86 		mutex_unlock(&rdev->pm.mutex);
87 	} else if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
88 		if (rdev->pm.profile == PM_PROFILE_AUTO) {
89 			mutex_lock(&rdev->pm.mutex);
90 			radeon_pm_update_profile(rdev);
91 			radeon_pm_set_clocks(rdev);
92 			mutex_unlock(&rdev->pm.mutex);
93 		}
94 	}
95 }
96 
radeon_pm_update_profile(struct radeon_device * rdev)97 static void radeon_pm_update_profile(struct radeon_device *rdev)
98 {
99 	switch (rdev->pm.profile) {
100 	case PM_PROFILE_DEFAULT:
101 		rdev->pm.profile_index = PM_PROFILE_DEFAULT_IDX;
102 		break;
103 	case PM_PROFILE_AUTO:
104 		if (power_supply_is_system_supplied() > 0) {
105 			if (rdev->pm.active_crtc_count > 1)
106 				rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;
107 			else
108 				rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;
109 		} else {
110 			if (rdev->pm.active_crtc_count > 1)
111 				rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
112 			else
113 				rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
114 		}
115 		break;
116 	case PM_PROFILE_LOW:
117 		if (rdev->pm.active_crtc_count > 1)
118 			rdev->pm.profile_index = PM_PROFILE_LOW_MH_IDX;
119 		else
120 			rdev->pm.profile_index = PM_PROFILE_LOW_SH_IDX;
121 		break;
122 	case PM_PROFILE_MID:
123 		if (rdev->pm.active_crtc_count > 1)
124 			rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
125 		else
126 			rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
127 		break;
128 	case PM_PROFILE_HIGH:
129 		if (rdev->pm.active_crtc_count > 1)
130 			rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;
131 		else
132 			rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;
133 		break;
134 	}
135 
136 	if (rdev->pm.active_crtc_count == 0) {
137 		rdev->pm.requested_power_state_index =
138 			rdev->pm.profiles[rdev->pm.profile_index].dpms_off_ps_idx;
139 		rdev->pm.requested_clock_mode_index =
140 			rdev->pm.profiles[rdev->pm.profile_index].dpms_off_cm_idx;
141 	} else {
142 		rdev->pm.requested_power_state_index =
143 			rdev->pm.profiles[rdev->pm.profile_index].dpms_on_ps_idx;
144 		rdev->pm.requested_clock_mode_index =
145 			rdev->pm.profiles[rdev->pm.profile_index].dpms_on_cm_idx;
146 	}
147 }
148 
radeon_unmap_vram_bos(struct radeon_device * rdev)149 static void radeon_unmap_vram_bos(struct radeon_device *rdev)
150 {
151 	struct radeon_bo *bo, *n;
152 
153 	if (list_empty(&rdev->gem.objects))
154 		return;
155 
156 	list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
157 		if (bo->tbo.resource->mem_type == TTM_PL_VRAM)
158 			ttm_bo_unmap_virtual(&bo->tbo);
159 	}
160 }
161 
radeon_sync_with_vblank(struct radeon_device * rdev)162 static void radeon_sync_with_vblank(struct radeon_device *rdev)
163 {
164 	if (rdev->pm.active_crtcs) {
165 		rdev->pm.vblank_sync = false;
166 		wait_event_timeout(
167 			rdev->irq.vblank_queue, rdev->pm.vblank_sync,
168 			msecs_to_jiffies(RADEON_WAIT_VBLANK_TIMEOUT));
169 	}
170 }
171 
radeon_set_power_state(struct radeon_device * rdev)172 static void radeon_set_power_state(struct radeon_device *rdev)
173 {
174 	u32 sclk, mclk;
175 	bool misc_after = false;
176 
177 	if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) &&
178 	    (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index))
179 		return;
180 
181 	if (radeon_gui_idle(rdev)) {
182 		sclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
183 			clock_info[rdev->pm.requested_clock_mode_index].sclk;
184 		if (sclk > rdev->pm.default_sclk)
185 			sclk = rdev->pm.default_sclk;
186 
187 		/* starting with BTC, there is one state that is used for both
188 		 * MH and SH.  Difference is that we always use the high clock index for
189 		 * mclk and vddci.
190 		 */
191 		if ((rdev->pm.pm_method == PM_METHOD_PROFILE) &&
192 		    (rdev->family >= CHIP_BARTS) &&
193 		    rdev->pm.active_crtc_count &&
194 		    ((rdev->pm.profile_index == PM_PROFILE_MID_MH_IDX) ||
195 		     (rdev->pm.profile_index == PM_PROFILE_LOW_MH_IDX)))
196 			mclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
197 				clock_info[rdev->pm.profiles[PM_PROFILE_HIGH_MH_IDX].dpms_on_cm_idx].mclk;
198 		else
199 			mclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
200 				clock_info[rdev->pm.requested_clock_mode_index].mclk;
201 
202 		if (mclk > rdev->pm.default_mclk)
203 			mclk = rdev->pm.default_mclk;
204 
205 		/* upvolt before raising clocks, downvolt after lowering clocks */
206 		if (sclk < rdev->pm.current_sclk)
207 			misc_after = true;
208 
209 		radeon_sync_with_vblank(rdev);
210 
211 		if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
212 			if (!radeon_pm_in_vbl(rdev))
213 				return;
214 		}
215 
216 		radeon_pm_prepare(rdev);
217 
218 		if (!misc_after)
219 			/* voltage, pcie lanes, etc.*/
220 			radeon_pm_misc(rdev);
221 
222 		/* set engine clock */
223 		if (sclk != rdev->pm.current_sclk) {
224 			radeon_pm_debug_check_in_vbl(rdev, false);
225 			radeon_set_engine_clock(rdev, sclk);
226 			radeon_pm_debug_check_in_vbl(rdev, true);
227 			rdev->pm.current_sclk = sclk;
228 			DRM_DEBUG_DRIVER("Setting: e: %d\n", sclk);
229 		}
230 
231 		/* set memory clock */
232 		if (rdev->asic->pm.set_memory_clock && (mclk != rdev->pm.current_mclk)) {
233 			radeon_pm_debug_check_in_vbl(rdev, false);
234 			radeon_set_memory_clock(rdev, mclk);
235 			radeon_pm_debug_check_in_vbl(rdev, true);
236 			rdev->pm.current_mclk = mclk;
237 			DRM_DEBUG_DRIVER("Setting: m: %d\n", mclk);
238 		}
239 
240 		if (misc_after)
241 			/* voltage, pcie lanes, etc.*/
242 			radeon_pm_misc(rdev);
243 
244 		radeon_pm_finish(rdev);
245 
246 		rdev->pm.current_power_state_index = rdev->pm.requested_power_state_index;
247 		rdev->pm.current_clock_mode_index = rdev->pm.requested_clock_mode_index;
248 	} else
249 		DRM_DEBUG_DRIVER("pm: GUI not idle!!!\n");
250 }
251 
radeon_pm_set_clocks(struct radeon_device * rdev)252 static void radeon_pm_set_clocks(struct radeon_device *rdev)
253 {
254 	struct drm_crtc *crtc;
255 	int i, r;
256 
257 	/* no need to take locks, etc. if nothing's going to change */
258 	if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) &&
259 	    (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index))
260 		return;
261 
262 	down_write(&rdev->pm.mclk_lock);
263 	mutex_lock(&rdev->ring_lock);
264 
265 	/* wait for the rings to drain */
266 	for (i = 0; i < RADEON_NUM_RINGS; i++) {
267 		struct radeon_ring *ring = &rdev->ring[i];
268 		if (!ring->ready) {
269 			continue;
270 		}
271 		r = radeon_fence_wait_empty(rdev, i);
272 		if (r) {
273 			/* needs a GPU reset dont reset here */
274 			mutex_unlock(&rdev->ring_lock);
275 			up_write(&rdev->pm.mclk_lock);
276 			return;
277 		}
278 	}
279 
280 	radeon_unmap_vram_bos(rdev);
281 
282 	if (rdev->irq.installed) {
283 		i = 0;
284 		drm_for_each_crtc(crtc, rdev->ddev) {
285 			if (rdev->pm.active_crtcs & (1 << i)) {
286 				/* This can fail if a modeset is in progress */
287 				if (drm_crtc_vblank_get(crtc) == 0)
288 					rdev->pm.req_vblank |= (1 << i);
289 				else
290 					DRM_DEBUG_DRIVER("crtc %d no vblank, can glitch\n",
291 							 i);
292 			}
293 			i++;
294 		}
295 	}
296 
297 	radeon_set_power_state(rdev);
298 
299 	if (rdev->irq.installed) {
300 		i = 0;
301 		drm_for_each_crtc(crtc, rdev->ddev) {
302 			if (rdev->pm.req_vblank & (1 << i)) {
303 				rdev->pm.req_vblank &= ~(1 << i);
304 				drm_crtc_vblank_put(crtc);
305 			}
306 			i++;
307 		}
308 	}
309 
310 	/* update display watermarks based on new power state */
311 	radeon_update_bandwidth_info(rdev);
312 	if (rdev->pm.active_crtc_count)
313 		radeon_bandwidth_update(rdev);
314 
315 	rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
316 
317 	mutex_unlock(&rdev->ring_lock);
318 	up_write(&rdev->pm.mclk_lock);
319 }
320 
radeon_pm_print_states(struct radeon_device * rdev)321 static void radeon_pm_print_states(struct radeon_device *rdev)
322 {
323 	int i, j;
324 	struct radeon_power_state *power_state;
325 	struct radeon_pm_clock_info *clock_info;
326 
327 	DRM_DEBUG_DRIVER("%d Power State(s)\n", rdev->pm.num_power_states);
328 	for (i = 0; i < rdev->pm.num_power_states; i++) {
329 		power_state = &rdev->pm.power_state[i];
330 		DRM_DEBUG_DRIVER("State %d: %s\n", i,
331 			radeon_pm_state_type_name[power_state->type]);
332 		if (i == rdev->pm.default_power_state_index)
333 			DRM_DEBUG_DRIVER("\tDefault");
334 		if ((rdev->flags & RADEON_IS_PCIE) && !(rdev->flags & RADEON_IS_IGP))
335 			DRM_DEBUG_DRIVER("\t%d PCIE Lanes\n", power_state->pcie_lanes);
336 		if (power_state->flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY)
337 			DRM_DEBUG_DRIVER("\tSingle display only\n");
338 		DRM_DEBUG_DRIVER("\t%d Clock Mode(s)\n", power_state->num_clock_modes);
339 		for (j = 0; j < power_state->num_clock_modes; j++) {
340 			clock_info = &(power_state->clock_info[j]);
341 			if (rdev->flags & RADEON_IS_IGP)
342 				DRM_DEBUG_DRIVER("\t\t%d e: %d\n",
343 						 j,
344 						 clock_info->sclk * 10);
345 			else
346 				DRM_DEBUG_DRIVER("\t\t%d e: %d\tm: %d\tv: %d\n",
347 						 j,
348 						 clock_info->sclk * 10,
349 						 clock_info->mclk * 10,
350 						 clock_info->voltage.voltage);
351 		}
352 	}
353 }
354 
radeon_get_pm_profile(struct device * dev,struct device_attribute * attr,char * buf)355 static ssize_t radeon_get_pm_profile(struct device *dev,
356 				     struct device_attribute *attr,
357 				     char *buf)
358 {
359 	struct drm_device *ddev = dev_get_drvdata(dev);
360 	struct radeon_device *rdev = ddev->dev_private;
361 	int cp = rdev->pm.profile;
362 
363 	return sysfs_emit(buf, "%s\n", (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 
radeon_set_pm_profile(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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 
radeon_get_pm_method(struct device * dev,struct device_attribute * attr,char * buf)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 sysfs_emit(buf, "%s\n", (pm == PM_METHOD_DYNPM) ? "dynpm" :
418 			  (pm == PM_METHOD_PROFILE) ? "profile" : "dpm");
419 }
420 
radeon_set_pm_method(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)421 static ssize_t radeon_set_pm_method(struct device *dev,
422 				    struct device_attribute *attr,
423 				    const char *buf,
424 				    size_t count)
425 {
426 	struct drm_device *ddev = dev_get_drvdata(dev);
427 	struct radeon_device *rdev = ddev->dev_private;
428 
429 	/* Can't set method when the card is off */
430 	if  ((rdev->flags & RADEON_IS_PX) &&
431 	     (ddev->switch_power_state != DRM_SWITCH_POWER_ON)) {
432 		count = -EINVAL;
433 		goto fail;
434 	}
435 
436 	/* we don't support the legacy modes with dpm */
437 	if (rdev->pm.pm_method == PM_METHOD_DPM) {
438 		count = -EINVAL;
439 		goto fail;
440 	}
441 
442 	if (strncmp("dynpm", buf, strlen("dynpm")) == 0) {
443 		mutex_lock(&rdev->pm.mutex);
444 		rdev->pm.pm_method = PM_METHOD_DYNPM;
445 		rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;
446 		rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
447 		mutex_unlock(&rdev->pm.mutex);
448 	} else if (strncmp("profile", buf, strlen("profile")) == 0) {
449 		mutex_lock(&rdev->pm.mutex);
450 		/* disable dynpm */
451 		rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
452 		rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
453 		rdev->pm.pm_method = PM_METHOD_PROFILE;
454 		mutex_unlock(&rdev->pm.mutex);
455 		cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
456 	} else {
457 		count = -EINVAL;
458 		goto fail;
459 	}
460 	radeon_pm_compute_clocks(rdev);
461 fail:
462 	return count;
463 }
464 
radeon_get_dpm_state(struct device * dev,struct device_attribute * attr,char * buf)465 static ssize_t radeon_get_dpm_state(struct device *dev,
466 				    struct device_attribute *attr,
467 				    char *buf)
468 {
469 	struct drm_device *ddev = dev_get_drvdata(dev);
470 	struct radeon_device *rdev = ddev->dev_private;
471 	enum radeon_pm_state_type pm = rdev->pm.dpm.user_state;
472 
473 	return sysfs_emit(buf, "%s\n",
474 			  (pm == POWER_STATE_TYPE_BATTERY) ? "battery" :
475 			  (pm == POWER_STATE_TYPE_BALANCED) ? "balanced" : "performance");
476 }
477 
radeon_set_dpm_state(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)478 static ssize_t radeon_set_dpm_state(struct device *dev,
479 				    struct device_attribute *attr,
480 				    const char *buf,
481 				    size_t count)
482 {
483 	struct drm_device *ddev = dev_get_drvdata(dev);
484 	struct radeon_device *rdev = ddev->dev_private;
485 
486 	mutex_lock(&rdev->pm.mutex);
487 	if (strncmp("battery", buf, strlen("battery")) == 0)
488 		rdev->pm.dpm.user_state = POWER_STATE_TYPE_BATTERY;
489 	else if (strncmp("balanced", buf, strlen("balanced")) == 0)
490 		rdev->pm.dpm.user_state = POWER_STATE_TYPE_BALANCED;
491 	else if (strncmp("performance", buf, strlen("performance")) == 0)
492 		rdev->pm.dpm.user_state = POWER_STATE_TYPE_PERFORMANCE;
493 	else {
494 		mutex_unlock(&rdev->pm.mutex);
495 		count = -EINVAL;
496 		goto fail;
497 	}
498 	mutex_unlock(&rdev->pm.mutex);
499 
500 	/* Can't set dpm state when the card is off */
501 	if (!(rdev->flags & RADEON_IS_PX) ||
502 	    (ddev->switch_power_state == DRM_SWITCH_POWER_ON))
503 		radeon_pm_compute_clocks(rdev);
504 
505 fail:
506 	return count;
507 }
508 
radeon_get_dpm_forced_performance_level(struct device * dev,struct device_attribute * attr,char * buf)509 static ssize_t radeon_get_dpm_forced_performance_level(struct device *dev,
510 						       struct device_attribute *attr,
511 						       char *buf)
512 {
513 	struct drm_device *ddev = dev_get_drvdata(dev);
514 	struct radeon_device *rdev = ddev->dev_private;
515 	enum radeon_dpm_forced_level level = rdev->pm.dpm.forced_level;
516 
517 	if  ((rdev->flags & RADEON_IS_PX) &&
518 	     (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
519 		return sysfs_emit(buf, "off\n");
520 
521 	return sysfs_emit(buf, "%s\n",
522 			  (level == RADEON_DPM_FORCED_LEVEL_AUTO) ? "auto" :
523 			  (level == RADEON_DPM_FORCED_LEVEL_LOW) ? "low" : "high");
524 }
525 
radeon_set_dpm_forced_performance_level(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)526 static ssize_t radeon_set_dpm_forced_performance_level(struct device *dev,
527 						       struct device_attribute *attr,
528 						       const char *buf,
529 						       size_t count)
530 {
531 	struct drm_device *ddev = dev_get_drvdata(dev);
532 	struct radeon_device *rdev = ddev->dev_private;
533 	enum radeon_dpm_forced_level level;
534 	int ret = 0;
535 
536 	/* Can't force performance level when the card is off */
537 	if  ((rdev->flags & RADEON_IS_PX) &&
538 	     (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
539 		return -EINVAL;
540 
541 	mutex_lock(&rdev->pm.mutex);
542 	if (strncmp("low", buf, strlen("low")) == 0) {
543 		level = RADEON_DPM_FORCED_LEVEL_LOW;
544 	} else if (strncmp("high", buf, strlen("high")) == 0) {
545 		level = RADEON_DPM_FORCED_LEVEL_HIGH;
546 	} else if (strncmp("auto", buf, strlen("auto")) == 0) {
547 		level = RADEON_DPM_FORCED_LEVEL_AUTO;
548 	} else {
549 		count = -EINVAL;
550 		goto fail;
551 	}
552 	if (rdev->asic->dpm.force_performance_level) {
553 		if (rdev->pm.dpm.thermal_active) {
554 			count = -EINVAL;
555 			goto fail;
556 		}
557 		ret = radeon_dpm_force_performance_level(rdev, level);
558 		if (ret)
559 			count = -EINVAL;
560 	}
561 fail:
562 	mutex_unlock(&rdev->pm.mutex);
563 
564 	return count;
565 }
566 
radeon_hwmon_get_pwm1_enable(struct device * dev,struct device_attribute * attr,char * buf)567 static ssize_t radeon_hwmon_get_pwm1_enable(struct device *dev,
568 					    struct device_attribute *attr,
569 					    char *buf)
570 {
571 	struct radeon_device *rdev = dev_get_drvdata(dev);
572 	u32 pwm_mode = 0;
573 
574 	if (rdev->asic->dpm.fan_ctrl_get_mode)
575 		pwm_mode = rdev->asic->dpm.fan_ctrl_get_mode(rdev);
576 
577 	/* never 0 (full-speed), fuse or smc-controlled always */
578 	return sprintf(buf, "%i\n", pwm_mode == FDO_PWM_MODE_STATIC ? 1 : 2);
579 }
580 
radeon_hwmon_set_pwm1_enable(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)581 static ssize_t radeon_hwmon_set_pwm1_enable(struct device *dev,
582 					    struct device_attribute *attr,
583 					    const char *buf,
584 					    size_t count)
585 {
586 	struct radeon_device *rdev = dev_get_drvdata(dev);
587 	int err;
588 	int value;
589 
590 	if(!rdev->asic->dpm.fan_ctrl_set_mode)
591 		return -EINVAL;
592 
593 	err = kstrtoint(buf, 10, &value);
594 	if (err)
595 		return err;
596 
597 	switch (value) {
598 	case 1: /* manual, percent-based */
599 		rdev->asic->dpm.fan_ctrl_set_mode(rdev, FDO_PWM_MODE_STATIC);
600 		break;
601 	default: /* disable */
602 		rdev->asic->dpm.fan_ctrl_set_mode(rdev, 0);
603 		break;
604 	}
605 
606 	return count;
607 }
608 
radeon_hwmon_get_pwm1_min(struct device * dev,struct device_attribute * attr,char * buf)609 static ssize_t radeon_hwmon_get_pwm1_min(struct device *dev,
610 					 struct device_attribute *attr,
611 					 char *buf)
612 {
613 	return sprintf(buf, "%i\n", 0);
614 }
615 
radeon_hwmon_get_pwm1_max(struct device * dev,struct device_attribute * attr,char * buf)616 static ssize_t radeon_hwmon_get_pwm1_max(struct device *dev,
617 					 struct device_attribute *attr,
618 					 char *buf)
619 {
620 	return sprintf(buf, "%i\n", 255);
621 }
622 
radeon_hwmon_set_pwm1(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)623 static ssize_t radeon_hwmon_set_pwm1(struct device *dev,
624 				     struct device_attribute *attr,
625 				     const char *buf, size_t count)
626 {
627 	struct radeon_device *rdev = dev_get_drvdata(dev);
628 	int err;
629 	u32 value;
630 
631 	err = kstrtou32(buf, 10, &value);
632 	if (err)
633 		return err;
634 
635 	value = (value * 100) / 255;
636 
637 	err = rdev->asic->dpm.set_fan_speed_percent(rdev, value);
638 	if (err)
639 		return err;
640 
641 	return count;
642 }
643 
radeon_hwmon_get_pwm1(struct device * dev,struct device_attribute * attr,char * buf)644 static ssize_t radeon_hwmon_get_pwm1(struct device *dev,
645 				     struct device_attribute *attr,
646 				     char *buf)
647 {
648 	struct radeon_device *rdev = dev_get_drvdata(dev);
649 	int err;
650 	u32 speed;
651 
652 	err = rdev->asic->dpm.get_fan_speed_percent(rdev, &speed);
653 	if (err)
654 		return err;
655 
656 	speed = (speed * 255) / 100;
657 
658 	return sprintf(buf, "%i\n", speed);
659 }
660 
661 static DEVICE_ATTR(power_profile, S_IRUGO | S_IWUSR, radeon_get_pm_profile, radeon_set_pm_profile);
662 static DEVICE_ATTR(power_method, S_IRUGO | S_IWUSR, radeon_get_pm_method, radeon_set_pm_method);
663 static DEVICE_ATTR(power_dpm_state, S_IRUGO | S_IWUSR, radeon_get_dpm_state, radeon_set_dpm_state);
664 static DEVICE_ATTR(power_dpm_force_performance_level, S_IRUGO | S_IWUSR,
665 		   radeon_get_dpm_forced_performance_level,
666 		   radeon_set_dpm_forced_performance_level);
667 
radeon_hwmon_show_temp(struct device * dev,struct device_attribute * attr,char * buf)668 static ssize_t radeon_hwmon_show_temp(struct device *dev,
669 				      struct device_attribute *attr,
670 				      char *buf)
671 {
672 	struct radeon_device *rdev = dev_get_drvdata(dev);
673 	struct drm_device *ddev = rdev->ddev;
674 	int temp;
675 
676 	/* Can't get temperature when the card is off */
677 	if  ((rdev->flags & RADEON_IS_PX) &&
678 	     (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
679 		return -EINVAL;
680 
681 	if (rdev->asic->pm.get_temperature)
682 		temp = radeon_get_temperature(rdev);
683 	else
684 		temp = 0;
685 
686 	return sysfs_emit(buf, "%d\n", temp);
687 }
688 
radeon_hwmon_show_temp_thresh(struct device * dev,struct device_attribute * attr,char * buf)689 static ssize_t radeon_hwmon_show_temp_thresh(struct device *dev,
690 					     struct device_attribute *attr,
691 					     char *buf)
692 {
693 	struct radeon_device *rdev = dev_get_drvdata(dev);
694 	int hyst = to_sensor_dev_attr(attr)->index;
695 	int temp;
696 
697 	if (hyst)
698 		temp = rdev->pm.dpm.thermal.min_temp;
699 	else
700 		temp = rdev->pm.dpm.thermal.max_temp;
701 
702 	return sysfs_emit(buf, "%d\n", temp);
703 }
704 
705 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, radeon_hwmon_show_temp, NULL, 0);
706 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, radeon_hwmon_show_temp_thresh, NULL, 0);
707 static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO, radeon_hwmon_show_temp_thresh, NULL, 1);
708 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, radeon_hwmon_get_pwm1, radeon_hwmon_set_pwm1, 0);
709 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, radeon_hwmon_get_pwm1_enable, radeon_hwmon_set_pwm1_enable, 0);
710 static SENSOR_DEVICE_ATTR(pwm1_min, S_IRUGO, radeon_hwmon_get_pwm1_min, NULL, 0);
711 static SENSOR_DEVICE_ATTR(pwm1_max, S_IRUGO, radeon_hwmon_get_pwm1_max, NULL, 0);
712 
radeon_hwmon_show_sclk(struct device * dev,struct device_attribute * attr,char * buf)713 static ssize_t radeon_hwmon_show_sclk(struct device *dev,
714 				      struct device_attribute *attr, char *buf)
715 {
716 	struct radeon_device *rdev = dev_get_drvdata(dev);
717 	struct drm_device *ddev = rdev->ddev;
718 	u32 sclk = 0;
719 
720 	/* Can't get clock frequency when the card is off */
721 	if ((rdev->flags & RADEON_IS_PX) &&
722 	    (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
723 		return -EINVAL;
724 
725 	if (rdev->asic->dpm.get_current_sclk)
726 		sclk = radeon_dpm_get_current_sclk(rdev);
727 
728 	/* Value returned by dpm is in 10 KHz units, need to convert it into Hz
729 	   for hwmon */
730 	sclk *= 10000;
731 
732 	return sysfs_emit(buf, "%u\n", sclk);
733 }
734 
735 static SENSOR_DEVICE_ATTR(freq1_input, S_IRUGO, radeon_hwmon_show_sclk, NULL,
736 			  0);
737 
radeon_hwmon_show_vddc(struct device * dev,struct device_attribute * attr,char * buf)738 static ssize_t radeon_hwmon_show_vddc(struct device *dev,
739 				      struct device_attribute *attr, char *buf)
740 {
741 	struct radeon_device *rdev = dev_get_drvdata(dev);
742 	struct drm_device *ddev = rdev->ddev;
743 	u16 vddc = 0;
744 
745 	/* Can't get vddc when the card is off */
746 	if ((rdev->flags & RADEON_IS_PX) &&
747 		(ddev->switch_power_state != DRM_SWITCH_POWER_ON))
748 		return -EINVAL;
749 
750 	if (rdev->asic->dpm.get_current_vddc)
751 		vddc = rdev->asic->dpm.get_current_vddc(rdev);
752 
753 	return sysfs_emit(buf, "%u\n", vddc);
754 }
755 
756 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, radeon_hwmon_show_vddc, NULL,
757 			  0);
758 
759 static struct attribute *hwmon_attributes[] = {
760 	&sensor_dev_attr_temp1_input.dev_attr.attr,
761 	&sensor_dev_attr_temp1_crit.dev_attr.attr,
762 	&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
763 	&sensor_dev_attr_pwm1.dev_attr.attr,
764 	&sensor_dev_attr_pwm1_enable.dev_attr.attr,
765 	&sensor_dev_attr_pwm1_min.dev_attr.attr,
766 	&sensor_dev_attr_pwm1_max.dev_attr.attr,
767 	&sensor_dev_attr_freq1_input.dev_attr.attr,
768 	&sensor_dev_attr_in0_input.dev_attr.attr,
769 	NULL
770 };
771 
hwmon_attributes_visible(struct kobject * kobj,struct attribute * attr,int index)772 static umode_t hwmon_attributes_visible(struct kobject *kobj,
773 					struct attribute *attr, int index)
774 {
775 	struct device *dev = kobj_to_dev(kobj);
776 	struct radeon_device *rdev = dev_get_drvdata(dev);
777 	umode_t effective_mode = attr->mode;
778 
779 	/* Skip attributes if DPM is not enabled */
780 	if (rdev->pm.pm_method != PM_METHOD_DPM &&
781 	    (attr == &sensor_dev_attr_temp1_crit.dev_attr.attr ||
782 	     attr == &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr ||
783 	     attr == &sensor_dev_attr_pwm1.dev_attr.attr ||
784 	     attr == &sensor_dev_attr_pwm1_enable.dev_attr.attr ||
785 	     attr == &sensor_dev_attr_pwm1_max.dev_attr.attr ||
786 	     attr == &sensor_dev_attr_pwm1_min.dev_attr.attr ||
787 	     attr == &sensor_dev_attr_freq1_input.dev_attr.attr ||
788 	     attr == &sensor_dev_attr_in0_input.dev_attr.attr))
789 		return 0;
790 
791 	/* Skip vddc attribute if get_current_vddc is not implemented */
792 	if(attr == &sensor_dev_attr_in0_input.dev_attr.attr &&
793 		!rdev->asic->dpm.get_current_vddc)
794 		return 0;
795 
796 	/* Skip fan attributes if fan is not present */
797 	if (rdev->pm.no_fan &&
798 	    (attr == &sensor_dev_attr_pwm1.dev_attr.attr ||
799 	     attr == &sensor_dev_attr_pwm1_enable.dev_attr.attr ||
800 	     attr == &sensor_dev_attr_pwm1_max.dev_attr.attr ||
801 	     attr == &sensor_dev_attr_pwm1_min.dev_attr.attr))
802 		return 0;
803 
804 	/* mask fan attributes if we have no bindings for this asic to expose */
805 	if ((!rdev->asic->dpm.get_fan_speed_percent &&
806 	     attr == &sensor_dev_attr_pwm1.dev_attr.attr) || /* can't query fan */
807 	    (!rdev->asic->dpm.fan_ctrl_get_mode &&
808 	     attr == &sensor_dev_attr_pwm1_enable.dev_attr.attr)) /* can't query state */
809 		effective_mode &= ~S_IRUGO;
810 
811 	if ((!rdev->asic->dpm.set_fan_speed_percent &&
812 	     attr == &sensor_dev_attr_pwm1.dev_attr.attr) || /* can't manage fan */
813 	    (!rdev->asic->dpm.fan_ctrl_set_mode &&
814 	     attr == &sensor_dev_attr_pwm1_enable.dev_attr.attr)) /* can't manage state */
815 		effective_mode &= ~S_IWUSR;
816 
817 	/* hide max/min values if we can't both query and manage the fan */
818 	if ((!rdev->asic->dpm.set_fan_speed_percent &&
819 	     !rdev->asic->dpm.get_fan_speed_percent) &&
820 	    (attr == &sensor_dev_attr_pwm1_max.dev_attr.attr ||
821 	     attr == &sensor_dev_attr_pwm1_min.dev_attr.attr))
822 		return 0;
823 
824 	return effective_mode;
825 }
826 
827 static const struct attribute_group hwmon_attrgroup = {
828 	.attrs = hwmon_attributes,
829 	.is_visible = hwmon_attributes_visible,
830 };
831 
832 static const struct attribute_group *hwmon_groups[] = {
833 	&hwmon_attrgroup,
834 	NULL
835 };
836 
radeon_hwmon_init(struct radeon_device * rdev)837 static int radeon_hwmon_init(struct radeon_device *rdev)
838 {
839 	int err = 0;
840 
841 	switch (rdev->pm.int_thermal_type) {
842 	case THERMAL_TYPE_RV6XX:
843 	case THERMAL_TYPE_RV770:
844 	case THERMAL_TYPE_EVERGREEN:
845 	case THERMAL_TYPE_NI:
846 	case THERMAL_TYPE_SUMO:
847 	case THERMAL_TYPE_SI:
848 	case THERMAL_TYPE_CI:
849 	case THERMAL_TYPE_KV:
850 		if (rdev->asic->pm.get_temperature == NULL)
851 			return err;
852 		rdev->pm.int_hwmon_dev = hwmon_device_register_with_groups(rdev->dev,
853 									   "radeon", rdev,
854 									   hwmon_groups);
855 		if (IS_ERR(rdev->pm.int_hwmon_dev)) {
856 			err = PTR_ERR(rdev->pm.int_hwmon_dev);
857 			dev_err(rdev->dev,
858 				"Unable to register hwmon device: %d\n", err);
859 		}
860 		break;
861 	default:
862 		break;
863 	}
864 
865 	return err;
866 }
867 
radeon_hwmon_fini(struct radeon_device * rdev)868 static void radeon_hwmon_fini(struct radeon_device *rdev)
869 {
870 	if (rdev->pm.int_hwmon_dev)
871 		hwmon_device_unregister(rdev->pm.int_hwmon_dev);
872 }
873 
radeon_dpm_thermal_work_handler(struct work_struct * work)874 static void radeon_dpm_thermal_work_handler(struct work_struct *work)
875 {
876 	struct radeon_device *rdev =
877 		container_of(work, struct radeon_device,
878 			     pm.dpm.thermal.work);
879 	/* switch to the thermal state */
880 	enum radeon_pm_state_type dpm_state = POWER_STATE_TYPE_INTERNAL_THERMAL;
881 
882 	if (!rdev->pm.dpm_enabled)
883 		return;
884 
885 	if (rdev->asic->pm.get_temperature) {
886 		int temp = radeon_get_temperature(rdev);
887 
888 		if (temp < rdev->pm.dpm.thermal.min_temp)
889 			/* switch back the user state */
890 			dpm_state = rdev->pm.dpm.user_state;
891 	} else {
892 		if (rdev->pm.dpm.thermal.high_to_low)
893 			/* switch back the user state */
894 			dpm_state = rdev->pm.dpm.user_state;
895 	}
896 	mutex_lock(&rdev->pm.mutex);
897 	if (dpm_state == POWER_STATE_TYPE_INTERNAL_THERMAL)
898 		rdev->pm.dpm.thermal_active = true;
899 	else
900 		rdev->pm.dpm.thermal_active = false;
901 	rdev->pm.dpm.state = dpm_state;
902 	mutex_unlock(&rdev->pm.mutex);
903 
904 	radeon_pm_compute_clocks(rdev);
905 }
906 
radeon_dpm_single_display(struct radeon_device * rdev)907 static bool radeon_dpm_single_display(struct radeon_device *rdev)
908 {
909 	bool single_display = (rdev->pm.dpm.new_active_crtc_count < 2) ?
910 		true : false;
911 
912 	/* check if the vblank period is too short to adjust the mclk */
913 	if (single_display && rdev->asic->dpm.vblank_too_short) {
914 		if (radeon_dpm_vblank_too_short(rdev))
915 			single_display = false;
916 	}
917 
918 	/* 120hz tends to be problematic even if they are under the
919 	 * vblank limit.
920 	 */
921 	if (single_display && (r600_dpm_get_vrefresh(rdev) >= 120))
922 		single_display = false;
923 
924 	return single_display;
925 }
926 
radeon_dpm_pick_power_state(struct radeon_device * rdev,enum radeon_pm_state_type dpm_state)927 static struct radeon_ps *radeon_dpm_pick_power_state(struct radeon_device *rdev,
928 						     enum radeon_pm_state_type dpm_state)
929 {
930 	int i;
931 	struct radeon_ps *ps;
932 	u32 ui_class;
933 	bool single_display = radeon_dpm_single_display(rdev);
934 
935 	/* certain older asics have a separare 3D performance state,
936 	 * so try that first if the user selected performance
937 	 */
938 	if (dpm_state == POWER_STATE_TYPE_PERFORMANCE)
939 		dpm_state = POWER_STATE_TYPE_INTERNAL_3DPERF;
940 	/* balanced states don't exist at the moment */
941 	if (dpm_state == POWER_STATE_TYPE_BALANCED)
942 		dpm_state = POWER_STATE_TYPE_PERFORMANCE;
943 
944 restart_search:
945 	/* Pick the best power state based on current conditions */
946 	for (i = 0; i < rdev->pm.dpm.num_ps; i++) {
947 		ps = &rdev->pm.dpm.ps[i];
948 		ui_class = ps->class & ATOM_PPLIB_CLASSIFICATION_UI_MASK;
949 		switch (dpm_state) {
950 		/* user states */
951 		case POWER_STATE_TYPE_BATTERY:
952 			if (ui_class == ATOM_PPLIB_CLASSIFICATION_UI_BATTERY) {
953 				if (ps->caps & ATOM_PPLIB_SINGLE_DISPLAY_ONLY) {
954 					if (single_display)
955 						return ps;
956 				} else
957 					return ps;
958 			}
959 			break;
960 		case POWER_STATE_TYPE_BALANCED:
961 			if (ui_class == ATOM_PPLIB_CLASSIFICATION_UI_BALANCED) {
962 				if (ps->caps & ATOM_PPLIB_SINGLE_DISPLAY_ONLY) {
963 					if (single_display)
964 						return ps;
965 				} else
966 					return ps;
967 			}
968 			break;
969 		case POWER_STATE_TYPE_PERFORMANCE:
970 			if (ui_class == ATOM_PPLIB_CLASSIFICATION_UI_PERFORMANCE) {
971 				if (ps->caps & ATOM_PPLIB_SINGLE_DISPLAY_ONLY) {
972 					if (single_display)
973 						return ps;
974 				} else
975 					return ps;
976 			}
977 			break;
978 		/* internal states */
979 		case POWER_STATE_TYPE_INTERNAL_UVD:
980 			if (rdev->pm.dpm.uvd_ps)
981 				return rdev->pm.dpm.uvd_ps;
982 			else
983 				break;
984 		case POWER_STATE_TYPE_INTERNAL_UVD_SD:
985 			if (ps->class & ATOM_PPLIB_CLASSIFICATION_SDSTATE)
986 				return ps;
987 			break;
988 		case POWER_STATE_TYPE_INTERNAL_UVD_HD:
989 			if (ps->class & ATOM_PPLIB_CLASSIFICATION_HDSTATE)
990 				return ps;
991 			break;
992 		case POWER_STATE_TYPE_INTERNAL_UVD_HD2:
993 			if (ps->class & ATOM_PPLIB_CLASSIFICATION_HD2STATE)
994 				return ps;
995 			break;
996 		case POWER_STATE_TYPE_INTERNAL_UVD_MVC:
997 			if (ps->class2 & ATOM_PPLIB_CLASSIFICATION2_MVC)
998 				return ps;
999 			break;
1000 		case POWER_STATE_TYPE_INTERNAL_BOOT:
1001 			return rdev->pm.dpm.boot_ps;
1002 		case POWER_STATE_TYPE_INTERNAL_THERMAL:
1003 			if (ps->class & ATOM_PPLIB_CLASSIFICATION_THERMAL)
1004 				return ps;
1005 			break;
1006 		case POWER_STATE_TYPE_INTERNAL_ACPI:
1007 			if (ps->class & ATOM_PPLIB_CLASSIFICATION_ACPI)
1008 				return ps;
1009 			break;
1010 		case POWER_STATE_TYPE_INTERNAL_ULV:
1011 			if (ps->class2 & ATOM_PPLIB_CLASSIFICATION2_ULV)
1012 				return ps;
1013 			break;
1014 		case POWER_STATE_TYPE_INTERNAL_3DPERF:
1015 			if (ps->class & ATOM_PPLIB_CLASSIFICATION_3DPERFORMANCE)
1016 				return ps;
1017 			break;
1018 		default:
1019 			break;
1020 		}
1021 	}
1022 	/* use a fallback state if we didn't match */
1023 	switch (dpm_state) {
1024 	case POWER_STATE_TYPE_INTERNAL_UVD_SD:
1025 		dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD;
1026 		goto restart_search;
1027 	case POWER_STATE_TYPE_INTERNAL_UVD_HD:
1028 	case POWER_STATE_TYPE_INTERNAL_UVD_HD2:
1029 	case POWER_STATE_TYPE_INTERNAL_UVD_MVC:
1030 		if (rdev->pm.dpm.uvd_ps) {
1031 			return rdev->pm.dpm.uvd_ps;
1032 		} else {
1033 			dpm_state = POWER_STATE_TYPE_PERFORMANCE;
1034 			goto restart_search;
1035 		}
1036 	case POWER_STATE_TYPE_INTERNAL_THERMAL:
1037 		dpm_state = POWER_STATE_TYPE_INTERNAL_ACPI;
1038 		goto restart_search;
1039 	case POWER_STATE_TYPE_INTERNAL_ACPI:
1040 		dpm_state = POWER_STATE_TYPE_BATTERY;
1041 		goto restart_search;
1042 	case POWER_STATE_TYPE_BATTERY:
1043 	case POWER_STATE_TYPE_BALANCED:
1044 	case POWER_STATE_TYPE_INTERNAL_3DPERF:
1045 		dpm_state = POWER_STATE_TYPE_PERFORMANCE;
1046 		goto restart_search;
1047 	default:
1048 		break;
1049 	}
1050 
1051 	return NULL;
1052 }
1053 
radeon_dpm_change_power_state_locked(struct radeon_device * rdev)1054 static void radeon_dpm_change_power_state_locked(struct radeon_device *rdev)
1055 {
1056 	int i;
1057 	struct radeon_ps *ps;
1058 	enum radeon_pm_state_type dpm_state;
1059 	int ret;
1060 	bool single_display = radeon_dpm_single_display(rdev);
1061 
1062 	/* if dpm init failed */
1063 	if (!rdev->pm.dpm_enabled)
1064 		return;
1065 
1066 	if (rdev->pm.dpm.user_state != rdev->pm.dpm.state) {
1067 		/* add other state override checks here */
1068 		if ((!rdev->pm.dpm.thermal_active) &&
1069 		    (!rdev->pm.dpm.uvd_active))
1070 			rdev->pm.dpm.state = rdev->pm.dpm.user_state;
1071 	}
1072 	dpm_state = rdev->pm.dpm.state;
1073 
1074 	ps = radeon_dpm_pick_power_state(rdev, dpm_state);
1075 	if (ps)
1076 		rdev->pm.dpm.requested_ps = ps;
1077 	else
1078 		return;
1079 
1080 	/* no need to reprogram if nothing changed unless we are on BTC+ */
1081 	if (rdev->pm.dpm.current_ps == rdev->pm.dpm.requested_ps) {
1082 		/* vce just modifies an existing state so force a change */
1083 		if (ps->vce_active != rdev->pm.dpm.vce_active)
1084 			goto force;
1085 		/* user has made a display change (such as timing) */
1086 		if (rdev->pm.dpm.single_display != single_display)
1087 			goto force;
1088 		if ((rdev->family < CHIP_BARTS) || (rdev->flags & RADEON_IS_IGP)) {
1089 			/* for pre-BTC and APUs if the num crtcs changed but state is the same,
1090 			 * all we need to do is update the display configuration.
1091 			 */
1092 			if (rdev->pm.dpm.new_active_crtcs != rdev->pm.dpm.current_active_crtcs) {
1093 				/* update display watermarks based on new power state */
1094 				radeon_bandwidth_update(rdev);
1095 				/* update displays */
1096 				radeon_dpm_display_configuration_changed(rdev);
1097 				rdev->pm.dpm.current_active_crtcs = rdev->pm.dpm.new_active_crtcs;
1098 				rdev->pm.dpm.current_active_crtc_count = rdev->pm.dpm.new_active_crtc_count;
1099 			}
1100 			return;
1101 		} else {
1102 			/* for BTC+ if the num crtcs hasn't changed and state is the same,
1103 			 * nothing to do, if the num crtcs is > 1 and state is the same,
1104 			 * update display configuration.
1105 			 */
1106 			if (rdev->pm.dpm.new_active_crtcs ==
1107 			    rdev->pm.dpm.current_active_crtcs) {
1108 				return;
1109 			} else {
1110 				if ((rdev->pm.dpm.current_active_crtc_count > 1) &&
1111 				    (rdev->pm.dpm.new_active_crtc_count > 1)) {
1112 					/* update display watermarks based on new power state */
1113 					radeon_bandwidth_update(rdev);
1114 					/* update displays */
1115 					radeon_dpm_display_configuration_changed(rdev);
1116 					rdev->pm.dpm.current_active_crtcs = rdev->pm.dpm.new_active_crtcs;
1117 					rdev->pm.dpm.current_active_crtc_count = rdev->pm.dpm.new_active_crtc_count;
1118 					return;
1119 				}
1120 			}
1121 		}
1122 	}
1123 
1124 force:
1125 	if (radeon_dpm == 1) {
1126 		printk("switching from power state:\n");
1127 		radeon_dpm_print_power_state(rdev, rdev->pm.dpm.current_ps);
1128 		printk("switching to power state:\n");
1129 		radeon_dpm_print_power_state(rdev, rdev->pm.dpm.requested_ps);
1130 	}
1131 
1132 	down_write(&rdev->pm.mclk_lock);
1133 	mutex_lock(&rdev->ring_lock);
1134 
1135 	/* update whether vce is active */
1136 	ps->vce_active = rdev->pm.dpm.vce_active;
1137 
1138 	ret = radeon_dpm_pre_set_power_state(rdev);
1139 	if (ret)
1140 		goto done;
1141 
1142 	/* update display watermarks based on new power state */
1143 	radeon_bandwidth_update(rdev);
1144 	/* update displays */
1145 	radeon_dpm_display_configuration_changed(rdev);
1146 
1147 	/* wait for the rings to drain */
1148 	for (i = 0; i < RADEON_NUM_RINGS; i++) {
1149 		struct radeon_ring *ring = &rdev->ring[i];
1150 		if (ring->ready)
1151 			radeon_fence_wait_empty(rdev, i);
1152 	}
1153 
1154 	/* program the new power state */
1155 	radeon_dpm_set_power_state(rdev);
1156 
1157 	/* update current power state */
1158 	rdev->pm.dpm.current_ps = rdev->pm.dpm.requested_ps;
1159 
1160 	radeon_dpm_post_set_power_state(rdev);
1161 
1162 	rdev->pm.dpm.current_active_crtcs = rdev->pm.dpm.new_active_crtcs;
1163 	rdev->pm.dpm.current_active_crtc_count = rdev->pm.dpm.new_active_crtc_count;
1164 	rdev->pm.dpm.single_display = single_display;
1165 
1166 	if (rdev->asic->dpm.force_performance_level) {
1167 		if (rdev->pm.dpm.thermal_active) {
1168 			enum radeon_dpm_forced_level level = rdev->pm.dpm.forced_level;
1169 			/* force low perf level for thermal */
1170 			radeon_dpm_force_performance_level(rdev, RADEON_DPM_FORCED_LEVEL_LOW);
1171 			/* save the user's level */
1172 			rdev->pm.dpm.forced_level = level;
1173 		} else {
1174 			/* otherwise, user selected level */
1175 			radeon_dpm_force_performance_level(rdev, rdev->pm.dpm.forced_level);
1176 		}
1177 	}
1178 
1179 done:
1180 	mutex_unlock(&rdev->ring_lock);
1181 	up_write(&rdev->pm.mclk_lock);
1182 }
1183 
radeon_dpm_enable_uvd(struct radeon_device * rdev,bool enable)1184 void radeon_dpm_enable_uvd(struct radeon_device *rdev, bool enable)
1185 {
1186 	enum radeon_pm_state_type dpm_state;
1187 
1188 	if (rdev->asic->dpm.powergate_uvd) {
1189 		mutex_lock(&rdev->pm.mutex);
1190 		/* don't powergate anything if we
1191 		   have active but pause streams */
1192 		enable |= rdev->pm.dpm.sd > 0;
1193 		enable |= rdev->pm.dpm.hd > 0;
1194 		/* enable/disable UVD */
1195 		radeon_dpm_powergate_uvd(rdev, !enable);
1196 		mutex_unlock(&rdev->pm.mutex);
1197 	} else {
1198 		if (enable) {
1199 			mutex_lock(&rdev->pm.mutex);
1200 			rdev->pm.dpm.uvd_active = true;
1201 			/* disable this for now */
1202 #if 0
1203 			if ((rdev->pm.dpm.sd == 1) && (rdev->pm.dpm.hd == 0))
1204 				dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_SD;
1205 			else if ((rdev->pm.dpm.sd == 2) && (rdev->pm.dpm.hd == 0))
1206 				dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD;
1207 			else if ((rdev->pm.dpm.sd == 0) && (rdev->pm.dpm.hd == 1))
1208 				dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD;
1209 			else if ((rdev->pm.dpm.sd == 0) && (rdev->pm.dpm.hd == 2))
1210 				dpm_state = POWER_STATE_TYPE_INTERNAL_UVD_HD2;
1211 			else
1212 #endif
1213 				dpm_state = POWER_STATE_TYPE_INTERNAL_UVD;
1214 			rdev->pm.dpm.state = dpm_state;
1215 			mutex_unlock(&rdev->pm.mutex);
1216 		} else {
1217 			mutex_lock(&rdev->pm.mutex);
1218 			rdev->pm.dpm.uvd_active = false;
1219 			mutex_unlock(&rdev->pm.mutex);
1220 		}
1221 
1222 		radeon_pm_compute_clocks(rdev);
1223 	}
1224 }
1225 
radeon_dpm_enable_vce(struct radeon_device * rdev,bool enable)1226 void radeon_dpm_enable_vce(struct radeon_device *rdev, bool enable)
1227 {
1228 	if (enable) {
1229 		mutex_lock(&rdev->pm.mutex);
1230 		rdev->pm.dpm.vce_active = true;
1231 		/* XXX select vce level based on ring/task */
1232 		rdev->pm.dpm.vce_level = RADEON_VCE_LEVEL_AC_ALL;
1233 		mutex_unlock(&rdev->pm.mutex);
1234 	} else {
1235 		mutex_lock(&rdev->pm.mutex);
1236 		rdev->pm.dpm.vce_active = false;
1237 		mutex_unlock(&rdev->pm.mutex);
1238 	}
1239 
1240 	radeon_pm_compute_clocks(rdev);
1241 }
1242 
radeon_pm_suspend_old(struct radeon_device * rdev)1243 static void radeon_pm_suspend_old(struct radeon_device *rdev)
1244 {
1245 	mutex_lock(&rdev->pm.mutex);
1246 	if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
1247 		if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE)
1248 			rdev->pm.dynpm_state = DYNPM_STATE_SUSPENDED;
1249 	}
1250 	mutex_unlock(&rdev->pm.mutex);
1251 
1252 	cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
1253 }
1254 
radeon_pm_suspend_dpm(struct radeon_device * rdev)1255 static void radeon_pm_suspend_dpm(struct radeon_device *rdev)
1256 {
1257 	mutex_lock(&rdev->pm.mutex);
1258 	/* disable dpm */
1259 	radeon_dpm_disable(rdev);
1260 	/* reset the power state */
1261 	rdev->pm.dpm.current_ps = rdev->pm.dpm.requested_ps = rdev->pm.dpm.boot_ps;
1262 	rdev->pm.dpm_enabled = false;
1263 	mutex_unlock(&rdev->pm.mutex);
1264 }
1265 
radeon_pm_suspend(struct radeon_device * rdev)1266 void radeon_pm_suspend(struct radeon_device *rdev)
1267 {
1268 	if (rdev->pm.pm_method == PM_METHOD_DPM)
1269 		radeon_pm_suspend_dpm(rdev);
1270 	else
1271 		radeon_pm_suspend_old(rdev);
1272 }
1273 
radeon_pm_resume_old(struct radeon_device * rdev)1274 static void radeon_pm_resume_old(struct radeon_device *rdev)
1275 {
1276 	/* set up the default clocks if the MC ucode is loaded */
1277 	if ((rdev->family >= CHIP_BARTS) &&
1278 	    (rdev->family <= CHIP_CAYMAN) &&
1279 	    rdev->mc_fw) {
1280 		if (rdev->pm.default_vddc)
1281 			radeon_atom_set_voltage(rdev, rdev->pm.default_vddc,
1282 						SET_VOLTAGE_TYPE_ASIC_VDDC);
1283 		if (rdev->pm.default_vddci)
1284 			radeon_atom_set_voltage(rdev, rdev->pm.default_vddci,
1285 						SET_VOLTAGE_TYPE_ASIC_VDDCI);
1286 		if (rdev->pm.default_sclk)
1287 			radeon_set_engine_clock(rdev, rdev->pm.default_sclk);
1288 		if (rdev->pm.default_mclk)
1289 			radeon_set_memory_clock(rdev, rdev->pm.default_mclk);
1290 	}
1291 	/* asic init will reset the default power state */
1292 	mutex_lock(&rdev->pm.mutex);
1293 	rdev->pm.current_power_state_index = rdev->pm.default_power_state_index;
1294 	rdev->pm.current_clock_mode_index = 0;
1295 	rdev->pm.current_sclk = rdev->pm.default_sclk;
1296 	rdev->pm.current_mclk = rdev->pm.default_mclk;
1297 	if (rdev->pm.power_state) {
1298 		rdev->pm.current_vddc = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage;
1299 		rdev->pm.current_vddci = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.vddci;
1300 	}
1301 	if (rdev->pm.pm_method == PM_METHOD_DYNPM
1302 	    && rdev->pm.dynpm_state == DYNPM_STATE_SUSPENDED) {
1303 		rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
1304 		schedule_delayed_work(&rdev->pm.dynpm_idle_work,
1305 				      msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
1306 	}
1307 	mutex_unlock(&rdev->pm.mutex);
1308 	radeon_pm_compute_clocks(rdev);
1309 }
1310 
radeon_pm_resume_dpm(struct radeon_device * rdev)1311 static void radeon_pm_resume_dpm(struct radeon_device *rdev)
1312 {
1313 	int ret;
1314 
1315 	/* asic init will reset to the boot state */
1316 	mutex_lock(&rdev->pm.mutex);
1317 	rdev->pm.dpm.current_ps = rdev->pm.dpm.requested_ps = rdev->pm.dpm.boot_ps;
1318 	radeon_dpm_setup_asic(rdev);
1319 	ret = radeon_dpm_enable(rdev);
1320 	mutex_unlock(&rdev->pm.mutex);
1321 	if (ret)
1322 		goto dpm_resume_fail;
1323 	rdev->pm.dpm_enabled = true;
1324 	return;
1325 
1326 dpm_resume_fail:
1327 	DRM_ERROR("radeon: dpm resume failed\n");
1328 	if ((rdev->family >= CHIP_BARTS) &&
1329 	    (rdev->family <= CHIP_CAYMAN) &&
1330 	    rdev->mc_fw) {
1331 		if (rdev->pm.default_vddc)
1332 			radeon_atom_set_voltage(rdev, rdev->pm.default_vddc,
1333 						SET_VOLTAGE_TYPE_ASIC_VDDC);
1334 		if (rdev->pm.default_vddci)
1335 			radeon_atom_set_voltage(rdev, rdev->pm.default_vddci,
1336 						SET_VOLTAGE_TYPE_ASIC_VDDCI);
1337 		if (rdev->pm.default_sclk)
1338 			radeon_set_engine_clock(rdev, rdev->pm.default_sclk);
1339 		if (rdev->pm.default_mclk)
1340 			radeon_set_memory_clock(rdev, rdev->pm.default_mclk);
1341 	}
1342 }
1343 
radeon_pm_resume(struct radeon_device * rdev)1344 void radeon_pm_resume(struct radeon_device *rdev)
1345 {
1346 	if (rdev->pm.pm_method == PM_METHOD_DPM)
1347 		radeon_pm_resume_dpm(rdev);
1348 	else
1349 		radeon_pm_resume_old(rdev);
1350 }
1351 
radeon_pm_init_old(struct radeon_device * rdev)1352 static int radeon_pm_init_old(struct radeon_device *rdev)
1353 {
1354 	int ret;
1355 
1356 	rdev->pm.profile = PM_PROFILE_DEFAULT;
1357 	rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
1358 	rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
1359 	rdev->pm.dynpm_can_upclock = true;
1360 	rdev->pm.dynpm_can_downclock = true;
1361 	rdev->pm.default_sclk = rdev->clock.default_sclk;
1362 	rdev->pm.default_mclk = rdev->clock.default_mclk;
1363 	rdev->pm.current_sclk = rdev->clock.default_sclk;
1364 	rdev->pm.current_mclk = rdev->clock.default_mclk;
1365 	rdev->pm.int_thermal_type = THERMAL_TYPE_NONE;
1366 
1367 	if (rdev->bios) {
1368 		if (rdev->is_atom_bios)
1369 			radeon_atombios_get_power_modes(rdev);
1370 		else
1371 			radeon_combios_get_power_modes(rdev);
1372 		radeon_pm_print_states(rdev);
1373 		radeon_pm_init_profile(rdev);
1374 		/* set up the default clocks if the MC ucode is loaded */
1375 		if ((rdev->family >= CHIP_BARTS) &&
1376 		    (rdev->family <= CHIP_CAYMAN) &&
1377 		    rdev->mc_fw) {
1378 			if (rdev->pm.default_vddc)
1379 				radeon_atom_set_voltage(rdev, rdev->pm.default_vddc,
1380 							SET_VOLTAGE_TYPE_ASIC_VDDC);
1381 			if (rdev->pm.default_vddci)
1382 				radeon_atom_set_voltage(rdev, rdev->pm.default_vddci,
1383 							SET_VOLTAGE_TYPE_ASIC_VDDCI);
1384 			if (rdev->pm.default_sclk)
1385 				radeon_set_engine_clock(rdev, rdev->pm.default_sclk);
1386 			if (rdev->pm.default_mclk)
1387 				radeon_set_memory_clock(rdev, rdev->pm.default_mclk);
1388 		}
1389 	}
1390 
1391 	/* set up the internal thermal sensor if applicable */
1392 	ret = radeon_hwmon_init(rdev);
1393 	if (ret)
1394 		return ret;
1395 
1396 	INIT_DELAYED_WORK(&rdev->pm.dynpm_idle_work, radeon_dynpm_idle_work_handler);
1397 
1398 	if (rdev->pm.num_power_states > 1) {
1399 		radeon_debugfs_pm_init(rdev);
1400 		DRM_INFO("radeon: power management initialized\n");
1401 	}
1402 
1403 	return 0;
1404 }
1405 
radeon_dpm_print_power_states(struct radeon_device * rdev)1406 static void radeon_dpm_print_power_states(struct radeon_device *rdev)
1407 {
1408 	int i;
1409 
1410 	for (i = 0; i < rdev->pm.dpm.num_ps; i++) {
1411 		printk("== power state %d ==\n", i);
1412 		radeon_dpm_print_power_state(rdev, &rdev->pm.dpm.ps[i]);
1413 	}
1414 }
1415 
radeon_pm_init_dpm(struct radeon_device * rdev)1416 static int radeon_pm_init_dpm(struct radeon_device *rdev)
1417 {
1418 	int ret;
1419 
1420 	/* default to balanced state */
1421 	rdev->pm.dpm.state = POWER_STATE_TYPE_BALANCED;
1422 	rdev->pm.dpm.user_state = POWER_STATE_TYPE_BALANCED;
1423 	rdev->pm.dpm.forced_level = RADEON_DPM_FORCED_LEVEL_AUTO;
1424 	rdev->pm.default_sclk = rdev->clock.default_sclk;
1425 	rdev->pm.default_mclk = rdev->clock.default_mclk;
1426 	rdev->pm.current_sclk = rdev->clock.default_sclk;
1427 	rdev->pm.current_mclk = rdev->clock.default_mclk;
1428 	rdev->pm.int_thermal_type = THERMAL_TYPE_NONE;
1429 
1430 	if (rdev->bios && rdev->is_atom_bios)
1431 		radeon_atombios_get_power_modes(rdev);
1432 	else
1433 		return -EINVAL;
1434 
1435 	/* set up the internal thermal sensor if applicable */
1436 	ret = radeon_hwmon_init(rdev);
1437 	if (ret)
1438 		return ret;
1439 
1440 	INIT_WORK(&rdev->pm.dpm.thermal.work, radeon_dpm_thermal_work_handler);
1441 	mutex_lock(&rdev->pm.mutex);
1442 	radeon_dpm_init(rdev);
1443 	rdev->pm.dpm.current_ps = rdev->pm.dpm.requested_ps = rdev->pm.dpm.boot_ps;
1444 	if (radeon_dpm == 1)
1445 		radeon_dpm_print_power_states(rdev);
1446 	radeon_dpm_setup_asic(rdev);
1447 	ret = radeon_dpm_enable(rdev);
1448 	mutex_unlock(&rdev->pm.mutex);
1449 	if (ret)
1450 		goto dpm_failed;
1451 	rdev->pm.dpm_enabled = true;
1452 
1453 	radeon_debugfs_pm_init(rdev);
1454 
1455 	DRM_INFO("radeon: dpm initialized\n");
1456 
1457 	return 0;
1458 
1459 dpm_failed:
1460 	rdev->pm.dpm_enabled = false;
1461 	if ((rdev->family >= CHIP_BARTS) &&
1462 	    (rdev->family <= CHIP_CAYMAN) &&
1463 	    rdev->mc_fw) {
1464 		if (rdev->pm.default_vddc)
1465 			radeon_atom_set_voltage(rdev, rdev->pm.default_vddc,
1466 						SET_VOLTAGE_TYPE_ASIC_VDDC);
1467 		if (rdev->pm.default_vddci)
1468 			radeon_atom_set_voltage(rdev, rdev->pm.default_vddci,
1469 						SET_VOLTAGE_TYPE_ASIC_VDDCI);
1470 		if (rdev->pm.default_sclk)
1471 			radeon_set_engine_clock(rdev, rdev->pm.default_sclk);
1472 		if (rdev->pm.default_mclk)
1473 			radeon_set_memory_clock(rdev, rdev->pm.default_mclk);
1474 	}
1475 	DRM_ERROR("radeon: dpm initialization failed\n");
1476 	return ret;
1477 }
1478 
1479 struct radeon_dpm_quirk {
1480 	u32 chip_vendor;
1481 	u32 chip_device;
1482 	u32 subsys_vendor;
1483 	u32 subsys_device;
1484 };
1485 
1486 /* cards with dpm stability problems */
1487 static struct radeon_dpm_quirk radeon_dpm_quirk_list[] = {
1488 	/* TURKS - https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1386534 */
1489 	{ PCI_VENDOR_ID_ATI, 0x6759, 0x1682, 0x3195 },
1490 	/* TURKS - https://bugzilla.kernel.org/show_bug.cgi?id=83731 */
1491 	{ PCI_VENDOR_ID_ATI, 0x6840, 0x1179, 0xfb81 },
1492 	{ 0, 0, 0, 0 },
1493 };
1494 
radeon_pm_init(struct radeon_device * rdev)1495 int radeon_pm_init(struct radeon_device *rdev)
1496 {
1497 	struct radeon_dpm_quirk *p = radeon_dpm_quirk_list;
1498 	bool disable_dpm = false;
1499 
1500 	/* Apply dpm quirks */
1501 	while (p && p->chip_device != 0) {
1502 		if (rdev->pdev->vendor == p->chip_vendor &&
1503 		    rdev->pdev->device == p->chip_device &&
1504 		    rdev->pdev->subsystem_vendor == p->subsys_vendor &&
1505 		    rdev->pdev->subsystem_device == p->subsys_device) {
1506 			disable_dpm = true;
1507 			break;
1508 		}
1509 		++p;
1510 	}
1511 
1512 	/* enable dpm on rv6xx+ */
1513 	switch (rdev->family) {
1514 	case CHIP_RV610:
1515 	case CHIP_RV630:
1516 	case CHIP_RV620:
1517 	case CHIP_RV635:
1518 	case CHIP_RV670:
1519 	case CHIP_RS780:
1520 	case CHIP_RS880:
1521 	case CHIP_RV770:
1522 		/* DPM requires the RLC, RV770+ dGPU requires SMC */
1523 		if (!rdev->rlc_fw)
1524 			rdev->pm.pm_method = PM_METHOD_PROFILE;
1525 		else if ((rdev->family >= CHIP_RV770) &&
1526 			 (!(rdev->flags & RADEON_IS_IGP)) &&
1527 			 (!rdev->smc_fw))
1528 			rdev->pm.pm_method = PM_METHOD_PROFILE;
1529 		else if (radeon_dpm == 1)
1530 			rdev->pm.pm_method = PM_METHOD_DPM;
1531 		else
1532 			rdev->pm.pm_method = PM_METHOD_PROFILE;
1533 		break;
1534 	case CHIP_RV730:
1535 	case CHIP_RV710:
1536 	case CHIP_RV740:
1537 	case CHIP_CEDAR:
1538 	case CHIP_REDWOOD:
1539 	case CHIP_JUNIPER:
1540 	case CHIP_CYPRESS:
1541 	case CHIP_HEMLOCK:
1542 	case CHIP_PALM:
1543 	case CHIP_SUMO:
1544 	case CHIP_SUMO2:
1545 	case CHIP_BARTS:
1546 	case CHIP_TURKS:
1547 	case CHIP_CAICOS:
1548 	case CHIP_CAYMAN:
1549 	case CHIP_ARUBA:
1550 	case CHIP_TAHITI:
1551 	case CHIP_PITCAIRN:
1552 	case CHIP_VERDE:
1553 	case CHIP_OLAND:
1554 	case CHIP_HAINAN:
1555 	case CHIP_BONAIRE:
1556 	case CHIP_KABINI:
1557 	case CHIP_KAVERI:
1558 	case CHIP_HAWAII:
1559 	case CHIP_MULLINS:
1560 		/* DPM requires the RLC, RV770+ dGPU requires SMC */
1561 		if (!rdev->rlc_fw)
1562 			rdev->pm.pm_method = PM_METHOD_PROFILE;
1563 		else if ((rdev->family >= CHIP_RV770) &&
1564 			 (!(rdev->flags & RADEON_IS_IGP)) &&
1565 			 (!rdev->smc_fw))
1566 			rdev->pm.pm_method = PM_METHOD_PROFILE;
1567 		else if (disable_dpm && (radeon_dpm == -1))
1568 			rdev->pm.pm_method = PM_METHOD_PROFILE;
1569 		else if (radeon_dpm == 0)
1570 			rdev->pm.pm_method = PM_METHOD_PROFILE;
1571 		else
1572 			rdev->pm.pm_method = PM_METHOD_DPM;
1573 		break;
1574 	default:
1575 		/* default to profile method */
1576 		rdev->pm.pm_method = PM_METHOD_PROFILE;
1577 		break;
1578 	}
1579 
1580 	if (rdev->pm.pm_method == PM_METHOD_DPM)
1581 		return radeon_pm_init_dpm(rdev);
1582 	else
1583 		return radeon_pm_init_old(rdev);
1584 }
1585 
radeon_pm_late_init(struct radeon_device * rdev)1586 int radeon_pm_late_init(struct radeon_device *rdev)
1587 {
1588 	int ret = 0;
1589 
1590 	if (rdev->pm.pm_method == PM_METHOD_DPM) {
1591 		if (rdev->pm.dpm_enabled) {
1592 			if (!rdev->pm.sysfs_initialized) {
1593 				ret = device_create_file(rdev->dev, &dev_attr_power_dpm_state);
1594 				if (ret)
1595 					DRM_ERROR("failed to create device file for dpm state\n");
1596 				ret = device_create_file(rdev->dev, &dev_attr_power_dpm_force_performance_level);
1597 				if (ret)
1598 					DRM_ERROR("failed to create device file for dpm state\n");
1599 				/* XXX: these are noops for dpm but are here for backwards compat */
1600 				ret = device_create_file(rdev->dev, &dev_attr_power_profile);
1601 				if (ret)
1602 					DRM_ERROR("failed to create device file for power profile\n");
1603 				ret = device_create_file(rdev->dev, &dev_attr_power_method);
1604 				if (ret)
1605 					DRM_ERROR("failed to create device file for power method\n");
1606 				rdev->pm.sysfs_initialized = true;
1607 			}
1608 
1609 			mutex_lock(&rdev->pm.mutex);
1610 			ret = radeon_dpm_late_enable(rdev);
1611 			mutex_unlock(&rdev->pm.mutex);
1612 			if (ret) {
1613 				rdev->pm.dpm_enabled = false;
1614 				DRM_ERROR("radeon_pm_late_init failed, disabling dpm\n");
1615 			} else {
1616 				/* set the dpm state for PX since there won't be
1617 				 * a modeset to call this.
1618 				 */
1619 				radeon_pm_compute_clocks(rdev);
1620 			}
1621 		}
1622 	} else {
1623 		if ((rdev->pm.num_power_states > 1) &&
1624 		    (!rdev->pm.sysfs_initialized)) {
1625 			/* where's the best place to put these? */
1626 			ret = device_create_file(rdev->dev, &dev_attr_power_profile);
1627 			if (ret)
1628 				DRM_ERROR("failed to create device file for power profile\n");
1629 			ret = device_create_file(rdev->dev, &dev_attr_power_method);
1630 			if (ret)
1631 				DRM_ERROR("failed to create device file for power method\n");
1632 			else
1633 				rdev->pm.sysfs_initialized = true;
1634 		}
1635 	}
1636 	return ret;
1637 }
1638 
radeon_pm_fini_old(struct radeon_device * rdev)1639 static void radeon_pm_fini_old(struct radeon_device *rdev)
1640 {
1641 	if (rdev->pm.num_power_states > 1) {
1642 		mutex_lock(&rdev->pm.mutex);
1643 		if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
1644 			rdev->pm.profile = PM_PROFILE_DEFAULT;
1645 			radeon_pm_update_profile(rdev);
1646 			radeon_pm_set_clocks(rdev);
1647 		} else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
1648 			/* reset default clocks */
1649 			rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
1650 			rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
1651 			radeon_pm_set_clocks(rdev);
1652 		}
1653 		mutex_unlock(&rdev->pm.mutex);
1654 
1655 		cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
1656 
1657 		device_remove_file(rdev->dev, &dev_attr_power_profile);
1658 		device_remove_file(rdev->dev, &dev_attr_power_method);
1659 	}
1660 
1661 	radeon_hwmon_fini(rdev);
1662 	kfree(rdev->pm.power_state);
1663 }
1664 
radeon_pm_fini_dpm(struct radeon_device * rdev)1665 static void radeon_pm_fini_dpm(struct radeon_device *rdev)
1666 {
1667 	if (rdev->pm.num_power_states > 1) {
1668 		mutex_lock(&rdev->pm.mutex);
1669 		radeon_dpm_disable(rdev);
1670 		mutex_unlock(&rdev->pm.mutex);
1671 
1672 		device_remove_file(rdev->dev, &dev_attr_power_dpm_state);
1673 		device_remove_file(rdev->dev, &dev_attr_power_dpm_force_performance_level);
1674 		/* XXX backwards compat */
1675 		device_remove_file(rdev->dev, &dev_attr_power_profile);
1676 		device_remove_file(rdev->dev, &dev_attr_power_method);
1677 	}
1678 	radeon_dpm_fini(rdev);
1679 
1680 	radeon_hwmon_fini(rdev);
1681 	kfree(rdev->pm.power_state);
1682 }
1683 
radeon_pm_fini(struct radeon_device * rdev)1684 void radeon_pm_fini(struct radeon_device *rdev)
1685 {
1686 	if (rdev->pm.pm_method == PM_METHOD_DPM)
1687 		radeon_pm_fini_dpm(rdev);
1688 	else
1689 		radeon_pm_fini_old(rdev);
1690 }
1691 
radeon_pm_compute_clocks_old(struct radeon_device * rdev)1692 static void radeon_pm_compute_clocks_old(struct radeon_device *rdev)
1693 {
1694 	struct drm_device *ddev = rdev->ddev;
1695 	struct drm_crtc *crtc;
1696 	struct radeon_crtc *radeon_crtc;
1697 
1698 	if (rdev->pm.num_power_states < 2)
1699 		return;
1700 
1701 	mutex_lock(&rdev->pm.mutex);
1702 
1703 	rdev->pm.active_crtcs = 0;
1704 	rdev->pm.active_crtc_count = 0;
1705 	if (rdev->num_crtc && rdev->mode_info.mode_config_initialized) {
1706 		list_for_each_entry(crtc,
1707 				    &ddev->mode_config.crtc_list, head) {
1708 			radeon_crtc = to_radeon_crtc(crtc);
1709 			if (radeon_crtc->enabled) {
1710 				rdev->pm.active_crtcs |= (1 << radeon_crtc->crtc_id);
1711 				rdev->pm.active_crtc_count++;
1712 			}
1713 		}
1714 	}
1715 
1716 	if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
1717 		radeon_pm_update_profile(rdev);
1718 		radeon_pm_set_clocks(rdev);
1719 	} else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
1720 		if (rdev->pm.dynpm_state != DYNPM_STATE_DISABLED) {
1721 			if (rdev->pm.active_crtc_count > 1) {
1722 				if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) {
1723 					cancel_delayed_work(&rdev->pm.dynpm_idle_work);
1724 
1725 					rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;
1726 					rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
1727 					radeon_pm_get_dynpm_state(rdev);
1728 					radeon_pm_set_clocks(rdev);
1729 
1730 					DRM_DEBUG_DRIVER("radeon: dynamic power management deactivated\n");
1731 				}
1732 			} else if (rdev->pm.active_crtc_count == 1) {
1733 				/* TODO: Increase clocks if needed for current mode */
1734 
1735 				if (rdev->pm.dynpm_state == DYNPM_STATE_MINIMUM) {
1736 					rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
1737 					rdev->pm.dynpm_planned_action = DYNPM_ACTION_UPCLOCK;
1738 					radeon_pm_get_dynpm_state(rdev);
1739 					radeon_pm_set_clocks(rdev);
1740 
1741 					schedule_delayed_work(&rdev->pm.dynpm_idle_work,
1742 							      msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
1743 				} else if (rdev->pm.dynpm_state == DYNPM_STATE_PAUSED) {
1744 					rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
1745 					schedule_delayed_work(&rdev->pm.dynpm_idle_work,
1746 							      msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
1747 					DRM_DEBUG_DRIVER("radeon: dynamic power management activated\n");
1748 				}
1749 			} else { /* count == 0 */
1750 				if (rdev->pm.dynpm_state != DYNPM_STATE_MINIMUM) {
1751 					cancel_delayed_work(&rdev->pm.dynpm_idle_work);
1752 
1753 					rdev->pm.dynpm_state = DYNPM_STATE_MINIMUM;
1754 					rdev->pm.dynpm_planned_action = DYNPM_ACTION_MINIMUM;
1755 					radeon_pm_get_dynpm_state(rdev);
1756 					radeon_pm_set_clocks(rdev);
1757 				}
1758 			}
1759 		}
1760 	}
1761 
1762 	mutex_unlock(&rdev->pm.mutex);
1763 }
1764 
radeon_pm_compute_clocks_dpm(struct radeon_device * rdev)1765 static void radeon_pm_compute_clocks_dpm(struct radeon_device *rdev)
1766 {
1767 	struct drm_device *ddev = rdev->ddev;
1768 	struct drm_crtc *crtc;
1769 	struct radeon_crtc *radeon_crtc;
1770 	struct radeon_connector *radeon_connector;
1771 
1772 	if (!rdev->pm.dpm_enabled)
1773 		return;
1774 
1775 	mutex_lock(&rdev->pm.mutex);
1776 
1777 	/* update active crtc counts */
1778 	rdev->pm.dpm.new_active_crtcs = 0;
1779 	rdev->pm.dpm.new_active_crtc_count = 0;
1780 	rdev->pm.dpm.high_pixelclock_count = 0;
1781 	if (rdev->num_crtc && rdev->mode_info.mode_config_initialized) {
1782 		list_for_each_entry(crtc,
1783 				    &ddev->mode_config.crtc_list, head) {
1784 			radeon_crtc = to_radeon_crtc(crtc);
1785 			if (crtc->enabled) {
1786 				rdev->pm.dpm.new_active_crtcs |= (1 << radeon_crtc->crtc_id);
1787 				rdev->pm.dpm.new_active_crtc_count++;
1788 				if (!radeon_crtc->connector)
1789 					continue;
1790 
1791 				radeon_connector = to_radeon_connector(radeon_crtc->connector);
1792 				if (radeon_connector->pixelclock_for_modeset > 297000)
1793 					rdev->pm.dpm.high_pixelclock_count++;
1794 			}
1795 		}
1796 	}
1797 
1798 	/* update battery/ac status */
1799 	if (power_supply_is_system_supplied() > 0)
1800 		rdev->pm.dpm.ac_power = true;
1801 	else
1802 		rdev->pm.dpm.ac_power = false;
1803 
1804 	radeon_dpm_change_power_state_locked(rdev);
1805 
1806 	mutex_unlock(&rdev->pm.mutex);
1807 
1808 }
1809 
radeon_pm_compute_clocks(struct radeon_device * rdev)1810 void radeon_pm_compute_clocks(struct radeon_device *rdev)
1811 {
1812 	if (rdev->pm.pm_method == PM_METHOD_DPM)
1813 		radeon_pm_compute_clocks_dpm(rdev);
1814 	else
1815 		radeon_pm_compute_clocks_old(rdev);
1816 }
1817 
radeon_pm_in_vbl(struct radeon_device * rdev)1818 static bool radeon_pm_in_vbl(struct radeon_device *rdev)
1819 {
1820 	int  crtc, vpos, hpos, vbl_status;
1821 	bool in_vbl = true;
1822 
1823 	/* Iterate over all active crtc's. All crtc's must be in vblank,
1824 	 * otherwise return in_vbl == false.
1825 	 */
1826 	for (crtc = 0; (crtc < rdev->num_crtc) && in_vbl; crtc++) {
1827 		if (rdev->pm.active_crtcs & (1 << crtc)) {
1828 			vbl_status = radeon_get_crtc_scanoutpos(rdev->ddev,
1829 								crtc,
1830 								USE_REAL_VBLANKSTART,
1831 								&vpos, &hpos, NULL, NULL,
1832 								&rdev->mode_info.crtcs[crtc]->base.hwmode);
1833 			if ((vbl_status & DRM_SCANOUTPOS_VALID) &&
1834 			    !(vbl_status & DRM_SCANOUTPOS_IN_VBLANK))
1835 				in_vbl = false;
1836 		}
1837 	}
1838 
1839 	return in_vbl;
1840 }
1841 
radeon_pm_debug_check_in_vbl(struct radeon_device * rdev,bool finish)1842 static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish)
1843 {
1844 	u32 stat_crtc = 0;
1845 	bool in_vbl = radeon_pm_in_vbl(rdev);
1846 
1847 	if (!in_vbl)
1848 		DRM_DEBUG_DRIVER("not in vbl for pm change %08x at %s\n", stat_crtc,
1849 			 finish ? "exit" : "entry");
1850 	return in_vbl;
1851 }
1852 
radeon_dynpm_idle_work_handler(struct work_struct * work)1853 static void radeon_dynpm_idle_work_handler(struct work_struct *work)
1854 {
1855 	struct radeon_device *rdev;
1856 	int resched;
1857 	rdev = container_of(work, struct radeon_device,
1858 				pm.dynpm_idle_work.work);
1859 
1860 	resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev);
1861 	mutex_lock(&rdev->pm.mutex);
1862 	if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) {
1863 		int not_processed = 0;
1864 		int i;
1865 
1866 		for (i = 0; i < RADEON_NUM_RINGS; ++i) {
1867 			struct radeon_ring *ring = &rdev->ring[i];
1868 
1869 			if (ring->ready) {
1870 				not_processed += radeon_fence_count_emitted(rdev, i);
1871 				if (not_processed >= 3)
1872 					break;
1873 			}
1874 		}
1875 
1876 		if (not_processed >= 3) { /* should upclock */
1877 			if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_DOWNCLOCK) {
1878 				rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
1879 			} else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE &&
1880 				   rdev->pm.dynpm_can_upclock) {
1881 				rdev->pm.dynpm_planned_action =
1882 					DYNPM_ACTION_UPCLOCK;
1883 				rdev->pm.dynpm_action_timeout = jiffies +
1884 				msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
1885 			}
1886 		} else if (not_processed == 0) { /* should downclock */
1887 			if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_UPCLOCK) {
1888 				rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
1889 			} else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE &&
1890 				   rdev->pm.dynpm_can_downclock) {
1891 				rdev->pm.dynpm_planned_action =
1892 					DYNPM_ACTION_DOWNCLOCK;
1893 				rdev->pm.dynpm_action_timeout = jiffies +
1894 				msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
1895 			}
1896 		}
1897 
1898 		/* Note, radeon_pm_set_clocks is called with static_switch set
1899 		 * to false since we want to wait for vbl to avoid flicker.
1900 		 */
1901 		if (rdev->pm.dynpm_planned_action != DYNPM_ACTION_NONE &&
1902 		    time_after(jiffies, rdev->pm.dynpm_action_timeout)) {
1903 			radeon_pm_get_dynpm_state(rdev);
1904 			radeon_pm_set_clocks(rdev);
1905 		}
1906 
1907 		schedule_delayed_work(&rdev->pm.dynpm_idle_work,
1908 				      msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
1909 	}
1910 	mutex_unlock(&rdev->pm.mutex);
1911 	ttm_bo_unlock_delayed_workqueue(&rdev->mman.bdev, resched);
1912 }
1913 
1914 /*
1915  * Debugfs info
1916  */
1917 #if defined(CONFIG_DEBUG_FS)
1918 
radeon_debugfs_pm_info_show(struct seq_file * m,void * unused)1919 static int radeon_debugfs_pm_info_show(struct seq_file *m, void *unused)
1920 {
1921 	struct radeon_device *rdev = (struct radeon_device *)m->private;
1922 	struct drm_device *ddev = rdev->ddev;
1923 
1924 	if  ((rdev->flags & RADEON_IS_PX) &&
1925 	     (ddev->switch_power_state != DRM_SWITCH_POWER_ON)) {
1926 		seq_printf(m, "PX asic powered off\n");
1927 	} else if (rdev->pm.dpm_enabled) {
1928 		mutex_lock(&rdev->pm.mutex);
1929 		if (rdev->asic->dpm.debugfs_print_current_performance_level)
1930 			radeon_dpm_debugfs_print_current_performance_level(rdev, m);
1931 		else
1932 			seq_printf(m, "Debugfs support not implemented for this asic\n");
1933 		mutex_unlock(&rdev->pm.mutex);
1934 	} else {
1935 		seq_printf(m, "default engine clock: %u0 kHz\n", rdev->pm.default_sclk);
1936 		/* radeon_get_engine_clock is not reliable on APUs so just print the current clock */
1937 		if ((rdev->family >= CHIP_PALM) && (rdev->flags & RADEON_IS_IGP))
1938 			seq_printf(m, "current engine clock: %u0 kHz\n", rdev->pm.current_sclk);
1939 		else
1940 			seq_printf(m, "current engine clock: %u0 kHz\n", radeon_get_engine_clock(rdev));
1941 		seq_printf(m, "default memory clock: %u0 kHz\n", rdev->pm.default_mclk);
1942 		if (rdev->asic->pm.get_memory_clock)
1943 			seq_printf(m, "current memory clock: %u0 kHz\n", radeon_get_memory_clock(rdev));
1944 		if (rdev->pm.current_vddc)
1945 			seq_printf(m, "voltage: %u mV\n", rdev->pm.current_vddc);
1946 		if (rdev->asic->pm.get_pcie_lanes)
1947 			seq_printf(m, "PCIE lanes: %d\n", radeon_get_pcie_lanes(rdev));
1948 	}
1949 
1950 	return 0;
1951 }
1952 
1953 DEFINE_SHOW_ATTRIBUTE(radeon_debugfs_pm_info);
1954 #endif
1955 
radeon_debugfs_pm_init(struct radeon_device * rdev)1956 static void radeon_debugfs_pm_init(struct radeon_device *rdev)
1957 {
1958 #if defined(CONFIG_DEBUG_FS)
1959 	struct dentry *root = rdev->ddev->primary->debugfs_root;
1960 
1961 	debugfs_create_file("radeon_pm_info", 0444, root, rdev,
1962 			    &radeon_debugfs_pm_info_fops);
1963 
1964 #endif
1965 }
1966