summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/radeon/radeon_pm.c
blob: aaa19dc418a0f0bf194d789592de943d3e5c2dca (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
/*
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Rafał Miłecki <zajec5@gmail.com>
 *          Alex Deucher <alexdeucher@gmail.com>
 */
#include "drmP.h"
#include "radeon.h"
#include "avivod.h"
#include "atom.h"
#ifdef CONFIG_ACPI
#include <linux/acpi.h>
#endif
#include <linux/power_supply.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>

#define RADEON_IDLE_LOOP_MS 100
#define RADEON_RECLOCK_DELAY_MS 200
#define RADEON_WAIT_VBLANK_TIMEOUT 200
#define RADEON_WAIT_IDLE_TIMEOUT 200

static const char *radeon_pm_state_type_name[5] = {
	"Default",
	"Powersave",
	"Battery",
	"Balanced",
	"Performance",
};

static void radeon_dynpm_idle_work_handler(struct work_struct *work);
static int radeon_debugfs_pm_init(struct radeon_device *rdev);
static bool radeon_pm_in_vbl(struct radeon_device *rdev);
static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish);
static void radeon_pm_update_profile(struct radeon_device *rdev);
static void radeon_pm_set_clocks(struct radeon_device *rdev);

#define ACPI_AC_CLASS           "ac_adapter"

#ifdef CONFIG_ACPI
static int radeon_acpi_event(struct notifier_block *nb,
			     unsigned long val,
			     void *data)
{
	struct radeon_device *rdev = container_of(nb, struct radeon_device, acpi_nb);
	struct acpi_bus_event *entry = (struct acpi_bus_event *)data;

	if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
		if (power_supply_is_system_supplied() > 0)
			DRM_DEBUG_DRIVER("pm: AC\n");
		else
			DRM_DEBUG_DRIVER("pm: DC\n");

		if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
			if (rdev->pm.profile == PM_PROFILE_AUTO) {
				mutex_lock(&rdev->pm.mutex);
				radeon_pm_update_profile(rdev);
				radeon_pm_set_clocks(rdev);
				mutex_unlock(&rdev->pm.mutex);
			}
		}
	}

	return NOTIFY_OK;
}
#endif

static void radeon_pm_update_profile(struct radeon_device *rdev)
{
	switch (rdev->pm.profile) {
	case PM_PROFILE_DEFAULT:
		rdev->pm.profile_index = PM_PROFILE_DEFAULT_IDX;
		break;
	case PM_PROFILE_AUTO:
		if (power_supply_is_system_supplied() > 0) {
			if (rdev->pm.active_crtc_count > 1)
				rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;
			else
				rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;
		} else {
			if (rdev->pm.active_crtc_count > 1)
				rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
			else
				rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
		}
		break;
	case PM_PROFILE_LOW:
		if (rdev->pm.active_crtc_count > 1)
			rdev->pm.profile_index = PM_PROFILE_LOW_MH_IDX;
		else
			rdev->pm.profile_index = PM_PROFILE_LOW_SH_IDX;
		break;
	case PM_PROFILE_MID:
		if (rdev->pm.active_crtc_count > 1)
			rdev->pm.profile_index = PM_PROFILE_MID_MH_IDX;
		else
			rdev->pm.profile_index = PM_PROFILE_MID_SH_IDX;
		break;
	case PM_PROFILE_HIGH:
		if (rdev->pm.active_crtc_count > 1)
			rdev->pm.profile_index = PM_PROFILE_HIGH_MH_IDX;
		else
			rdev->pm.profile_index = PM_PROFILE_HIGH_SH_IDX;
		break;
	}

	if (rdev->pm.active_crtc_count == 0) {
		rdev->pm.requested_power_state_index =
			rdev->pm.profiles[rdev->pm.profile_index].dpms_off_ps_idx;
		rdev->pm.requested_clock_mode_index =
			rdev->pm.profiles[rdev->pm.profile_index].dpms_off_cm_idx;
	} else {
		rdev->pm.requested_power_state_index =
			rdev->pm.profiles[rdev->pm.profile_index].dpms_on_ps_idx;
		rdev->pm.requested_clock_mode_index =
			rdev->pm.profiles[rdev->pm.profile_index].dpms_on_cm_idx;
	}
}

static void radeon_unmap_vram_bos(struct radeon_device *rdev)
{
	struct radeon_bo *bo, *n;

	if (list_empty(&rdev->gem.objects))
		return;

	list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) {
		if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
			ttm_bo_unmap_virtual(&bo->tbo);
	}
}

static void radeon_sync_with_vblank(struct radeon_device *rdev)
{
	if (rdev->pm.active_crtcs) {
		rdev->pm.vblank_sync = false;
		wait_event_timeout(
			rdev->irq.vblank_queue, rdev->pm.vblank_sync,
			msecs_to_jiffies(RADEON_WAIT_VBLANK_TIMEOUT));
	}
}

static void radeon_set_power_state(struct radeon_device *rdev)
{
	u32 sclk, mclk;
	bool misc_after = false;

	if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) &&
	    (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index))
		return;

	if (radeon_gui_idle(rdev)) {
		sclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
			clock_info[rdev->pm.requested_clock_mode_index].sclk;
		if (sclk > rdev->pm.default_sclk)
			sclk = rdev->pm.default_sclk;

		mclk = rdev->pm.power_state[rdev->pm.requested_power_state_index].
			clock_info[rdev->pm.requested_clock_mode_index].mclk;
		if (mclk > rdev->pm.default_mclk)
			mclk = rdev->pm.default_mclk;

		/* upvolt before raising clocks, downvolt after lowering clocks */
		if (sclk < rdev->pm.current_sclk)
			misc_after = true;

		radeon_sync_with_vblank(rdev);

		if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
			if (!radeon_pm_in_vbl(rdev))
				return;
		}

		radeon_pm_prepare(rdev);

		if (!misc_after)
			/* voltage, pcie lanes, etc.*/
			radeon_pm_misc(rdev);

		/* set engine clock */
		if (sclk != rdev->pm.current_sclk) {
			radeon_pm_debug_check_in_vbl(rdev, false);
			radeon_set_engine_clock(rdev, sclk);
			radeon_pm_debug_check_in_vbl(rdev, true);
			rdev->pm.current_sclk = sclk;
			DRM_DEBUG_DRIVER("Setting: e: %d\n", sclk);
		}

		/* set memory clock */
		if (rdev->asic->set_memory_clock && (mclk != rdev->pm.current_mclk)) {
			radeon_pm_debug_check_in_vbl(rdev, false);
			radeon_set_memory_clock(rdev, mclk);
			radeon_pm_debug_check_in_vbl(rdev, true);
			rdev->pm.current_mclk = mclk;
			DRM_DEBUG_DRIVER("Setting: m: %d\n", mclk);
		}

		if (misc_after)
			/* voltage, pcie lanes, etc.*/
			radeon_pm_misc(rdev);

		radeon_pm_finish(rdev);

		rdev->pm.current_power_state_index = rdev->pm.requested_power_state_index;
		rdev->pm.current_clock_mode_index = rdev->pm.requested_clock_mode_index;
	} else
		DRM_DEBUG_DRIVER("pm: GUI not idle!!!\n");
}

static void radeon_pm_set_clocks(struct radeon_device *rdev)
{
	int i;

	/* no need to take locks, etc. if nothing's going to change */
	if ((rdev->pm.requested_clock_mode_index == rdev->pm.current_clock_mode_index) &&
	    (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index))
		return;

	mutex_lock(&rdev->ddev->struct_mutex);
	mutex_lock(&rdev->vram_mutex);
	mutex_lock(&rdev->cp.mutex);

	/* gui idle int has issues on older chips it seems */
	if (rdev->family >= CHIP_R600) {
		if (rdev->irq.installed) {
			/* wait for GPU idle */
			rdev->pm.gui_idle = false;
			rdev->irq.gui_idle = true;
			radeon_irq_set(rdev);
			wait_event_interruptible_timeout(
				rdev->irq.idle_queue, rdev->pm.gui_idle,
				msecs_to_jiffies(RADEON_WAIT_IDLE_TIMEOUT));
			rdev->irq.gui_idle = false;
			radeon_irq_set(rdev);
		}
	} else {
		if (rdev->cp.ready) {
			struct radeon_fence *fence;
			radeon_ring_alloc(rdev, 64);
			radeon_fence_create(rdev, &fence);
			radeon_fence_emit(rdev, fence);
			radeon_ring_commit(rdev);
			radeon_fence_wait(fence, false);
			radeon_fence_unref(&fence);
		}
	}
	radeon_unmap_vram_bos(rdev);

	if (rdev->irq.installed) {
		for (i = 0; i < rdev->num_crtc; i++) {
			if (rdev->pm.active_crtcs & (1 << i)) {
				rdev->pm.req_vblank |= (1 << i);
				drm_vblank_get(rdev->ddev, i);
			}
		}
	}

	radeon_set_power_state(rdev);

	if (rdev->irq.installed) {
		for (i = 0; i < rdev->num_crtc; i++) {
			if (rdev->pm.req_vblank & (1 << i)) {
				rdev->pm.req_vblank &= ~(1 << i);
				drm_vblank_put(rdev->ddev, i);
			}
		}
	}

	/* update display watermarks based on new power state */
	radeon_update_bandwidth_info(rdev);
	if (rdev->pm.active_crtc_count)
		radeon_bandwidth_update(rdev);

	rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;

	mutex_unlock(&rdev->cp.mutex);
	mutex_unlock(&rdev->vram_mutex);
	mutex_unlock(&rdev->ddev->struct_mutex);
}

static void radeon_pm_print_states(struct radeon_device *rdev)
{
	int i, j;
	struct radeon_power_state *power_state;
	struct radeon_pm_clock_info *clock_info;

	DRM_DEBUG_DRIVER("%d Power State(s)\n", rdev->pm.num_power_states);
	for (i = 0; i < rdev->pm.num_power_states; i++) {
		power_state = &rdev->pm.power_state[i];
		DRM_DEBUG_DRIVER("State %d: %s\n", i,
			radeon_pm_state_type_name[power_state->type]);
		if (i == rdev->pm.default_power_state_index)
			DRM_DEBUG_DRIVER("\tDefault");
		if ((rdev->flags & RADEON_IS_PCIE) && !(rdev->flags & RADEON_IS_IGP))
			DRM_DEBUG_DRIVER("\t%d PCIE Lanes\n", power_state->pcie_lanes);
		if (power_state->flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY)
			DRM_DEBUG_DRIVER("\tSingle display only\n");
		DRM_DEBUG_DRIVER("\t%d Clock Mode(s)\n", power_state->num_clock_modes);
		for (j = 0; j < power_state->num_clock_modes; j++) {
			clock_info = &(power_state->clock_info[j]);
			if (rdev->flags & RADEON_IS_IGP)
				DRM_DEBUG_DRIVER("\t\t%d e: %d%s\n",
					j,
					clock_info->sclk * 10,
					clock_info->flags & RADEON_PM_MODE_NO_DISPLAY ? "\tNo display only" : "");
			else
				DRM_DEBUG_DRIVER("\t\t%d e: %d\tm: %d\tv: %d%s\n",
					j,
					clock_info->sclk * 10,
					clock_info->mclk * 10,
					clock_info->voltage.voltage,
					clock_info->flags & RADEON_PM_MODE_NO_DISPLAY ? "\tNo display only" : "");
		}
	}
}

static ssize_t radeon_get_pm_profile(struct device *dev,
				     struct device_attribute *attr,
				     char *buf)
{
	struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
	struct radeon_device *rdev = ddev->dev_private;
	int cp = rdev->pm.profile;

	return snprintf(buf, PAGE_SIZE, "%s\n",
			(cp == PM_PROFILE_AUTO) ? "auto" :
			(cp == PM_PROFILE_LOW) ? "low" :
			(cp == PM_PROFILE_MID) ? "mid" :
			(cp == PM_PROFILE_HIGH) ? "high" : "default");
}

static ssize_t radeon_set_pm_profile(struct device *dev,
				     struct device_attribute *attr,
				     const char *buf,
				     size_t count)
{
	struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
	struct radeon_device *rdev = ddev->dev_private;

	mutex_lock(&rdev->pm.mutex);
	if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
		if (strncmp("default", buf, strlen("default")) == 0)
			rdev->pm.profile = PM_PROFILE_DEFAULT;
		else if (strncmp("auto", buf, strlen("auto")) == 0)
			rdev->pm.profile = PM_PROFILE_AUTO;
		else if (strncmp("low", buf, strlen("low")) == 0)
			rdev->pm.profile = PM_PROFILE_LOW;
		else if (strncmp("mid", buf, strlen("mid")) == 0)
			rdev->pm.profile = PM_PROFILE_MID;
		else if (strncmp("high", buf, strlen("high")) == 0)
			rdev->pm.profile = PM_PROFILE_HIGH;
		else {
			count = -EINVAL;
			goto fail;
		}
		radeon_pm_update_profile(rdev);
		radeon_pm_set_clocks(rdev);
	} else
		count = -EINVAL;

fail:
	mutex_unlock(&rdev->pm.mutex);

	return count;
}

static ssize_t radeon_get_pm_method(struct device *dev,
				    struct device_attribute *attr,
				    char *buf)
{
	struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
	struct radeon_device *rdev = ddev->dev_private;
	int pm = rdev->pm.pm_method;

	return snprintf(buf, PAGE_SIZE, "%s\n",
			(pm == PM_METHOD_DYNPM) ? "dynpm" : "profile");
}

static ssize_t radeon_set_pm_method(struct device *dev,
				    struct device_attribute *attr,
				    const char *buf,
				    size_t count)
{
	struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
	struct radeon_device *rdev = ddev->dev_private;


	if (strncmp("dynpm", buf, strlen("dynpm")) == 0) {
		mutex_lock(&rdev->pm.mutex);
		rdev->pm.pm_method = PM_METHOD_DYNPM;
		rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;
		rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
		mutex_unlock(&rdev->pm.mutex);
	} else if (strncmp("profile", buf, strlen("profile")) == 0) {
		mutex_lock(&rdev->pm.mutex);
		/* disable dynpm */
		rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
		rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
		rdev->pm.pm_method = PM_METHOD_PROFILE;
		mutex_unlock(&rdev->pm.mutex);
		cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
	} else {
		count = -EINVAL;
		goto fail;
	}
	radeon_pm_compute_clocks(rdev);
fail:
	return count;
}

static DEVICE_ATTR(power_profile, S_IRUGO | S_IWUSR, radeon_get_pm_profile, radeon_set_pm_profile);
static DEVICE_ATTR(power_method, S_IRUGO | S_IWUSR, radeon_get_pm_method, radeon_set_pm_method);

static ssize_t radeon_hwmon_show_temp(struct device *dev,
				      struct device_attribute *attr,
				      char *buf)
{
	struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
	struct radeon_device *rdev = ddev->dev_private;
	int temp;

	switch (rdev->pm.int_thermal_type) {
	case THERMAL_TYPE_RV6XX:
		temp = rv6xx_get_temp(rdev);
		break;
	case THERMAL_TYPE_RV770:
		temp = rv770_get_temp(rdev);
		break;
	case THERMAL_TYPE_EVERGREEN:
	case THERMAL_TYPE_NI:
		temp = evergreen_get_temp(rdev);
		break;
	case THERMAL_TYPE_SUMO:
		temp = sumo_get_temp(rdev);
		break;
	default:
		temp = 0;
		break;
	}

	return snprintf(buf, PAGE_SIZE, "%d\n", temp);
}

static ssize_t radeon_hwmon_show_name(struct device *dev,
				      struct device_attribute *attr,
				      char *buf)
{
	return sprintf(buf, "radeon\n");
}

static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, radeon_hwmon_show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(name, S_IRUGO, radeon_hwmon_show_name, NULL, 0);

static struct attribute *hwmon_attributes[] = {
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_name.dev_attr.attr,
	NULL
};

static const struct attribute_group hwmon_attrgroup = {
	.attrs = hwmon_attributes,
};

static int radeon_hwmon_init(struct radeon_device *rdev)
{
	int err = 0;

	rdev->pm.int_hwmon_dev = NULL;

	switch (rdev->pm.int_thermal_type) {
	case THERMAL_TYPE_RV6XX:
	case THERMAL_TYPE_RV770:
	case THERMAL_TYPE_EVERGREEN:
	case THERMAL_TYPE_NI:
	case THERMAL_TYPE_SUMO:
		rdev->pm.int_hwmon_dev = hwmon_device_register(rdev->dev);
		if (IS_ERR(rdev->pm.int_hwmon_dev)) {
			err = PTR_ERR(rdev->pm.int_hwmon_dev);
			dev_err(rdev->dev,
				"Unable to register hwmon device: %d\n", err);
			break;
		}
		dev_set_drvdata(rdev->pm.int_hwmon_dev, rdev->ddev);
		err = sysfs_create_group(&rdev->pm.int_hwmon_dev->kobj,
					 &hwmon_attrgroup);
		if (err) {
			dev_err(rdev->dev,
				"Unable to create hwmon sysfs file: %d\n", err);
			hwmon_device_unregister(rdev->dev);
		}
		break;
	default:
		break;
	}

	return err;
}

static void radeon_hwmon_fini(struct radeon_device *rdev)
{
	if (rdev->pm.int_hwmon_dev) {
		sysfs_remove_group(&rdev->pm.int_hwmon_dev->kobj, &hwmon_attrgroup);
		hwmon_device_unregister(rdev->pm.int_hwmon_dev);
	}
}

void radeon_pm_suspend(struct radeon_device *rdev)
{
	mutex_lock(&rdev->pm.mutex);
	if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
		if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE)
			rdev->pm.dynpm_state = DYNPM_STATE_SUSPENDED;
	}
	mutex_unlock(&rdev->pm.mutex);

	cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
}

void radeon_pm_resume(struct radeon_device *rdev)
{
	/* set up the default clocks if the MC ucode is loaded */
	if (ASIC_IS_DCE5(rdev) && rdev->mc_fw) {
		if (rdev->pm.default_vddc)
			radeon_atom_set_voltage(rdev, rdev->pm.default_vddc,
						SET_VOLTAGE_TYPE_ASIC_VDDC);
		if (rdev->pm.default_vddci)
			radeon_atom_set_voltage(rdev, rdev->pm.default_vddci,
						SET_VOLTAGE_TYPE_ASIC_VDDCI);
		if (rdev->pm.default_sclk)
			radeon_set_engine_clock(rdev, rdev->pm.default_sclk);
		if (rdev->pm.default_mclk)
			radeon_set_memory_clock(rdev, rdev->pm.default_mclk);
	}
	/* asic init will reset the default power state */
	mutex_lock(&rdev->pm.mutex);
	rdev->pm.current_power_state_index = rdev->pm.default_power_state_index;
	rdev->pm.current_clock_mode_index = 0;
	rdev->pm.current_sclk = rdev->pm.default_sclk;
	rdev->pm.current_mclk = rdev->pm.default_mclk;
	rdev->pm.current_vddc = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage;
	rdev->pm.current_vddci = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.vddci;
	if (rdev->pm.pm_method == PM_METHOD_DYNPM
	    && rdev->pm.dynpm_state == DYNPM_STATE_SUSPENDED) {
		rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
		schedule_delayed_work(&rdev->pm.dynpm_idle_work,
				      msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
	}
	mutex_unlock(&rdev->pm.mutex);
	radeon_pm_compute_clocks(rdev);
}

int radeon_pm_init(struct radeon_device *rdev)
{
	int ret;

	/* default to profile method */
	rdev->pm.pm_method = PM_METHOD_PROFILE;
	rdev->pm.profile = PM_PROFILE_DEFAULT;
	rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
	rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
	rdev->pm.dynpm_can_upclock = true;
	rdev->pm.dynpm_can_downclock = true;
	rdev->pm.default_sclk = rdev->clock.default_sclk;
	rdev->pm.default_mclk = rdev->clock.default_mclk;
	rdev->pm.current_sclk = rdev->clock.default_sclk;
	rdev->pm.current_mclk = rdev->clock.default_mclk;
	rdev->pm.int_thermal_type = THERMAL_TYPE_NONE;

	if (rdev->bios) {
		if (rdev->is_atom_bios)
			radeon_atombios_get_power_modes(rdev);
		else
			radeon_combios_get_power_modes(rdev);
		radeon_pm_print_states(rdev);
		radeon_pm_init_profile(rdev);
		/* set up the default clocks if the MC ucode is loaded */
		if (ASIC_IS_DCE5(rdev) && rdev->mc_fw) {
			if (rdev->pm.default_vddc)
				radeon_atom_set_voltage(rdev, rdev->pm.default_vddc,
							SET_VOLTAGE_TYPE_ASIC_VDDC);
			if (rdev->pm.default_sclk)
				radeon_set_engine_clock(rdev, rdev->pm.default_sclk);
			if (rdev->pm.default_mclk)
				radeon_set_memory_clock(rdev, rdev->pm.default_mclk);
		}
	}

	/* set up the internal thermal sensor if applicable */
	ret = radeon_hwmon_init(rdev);
	if (ret)
		return ret;

	INIT_DELAYED_WORK(&rdev->pm.dynpm_idle_work, radeon_dynpm_idle_work_handler);

	if (rdev->pm.num_power_states > 1) {
		/* where's the best place to put these? */
		ret = device_create_file(rdev->dev, &dev_attr_power_profile);
		if (ret)
			DRM_ERROR("failed to create device file for power profile\n");
		ret = device_create_file(rdev->dev, &dev_attr_power_method);
		if (ret)
			DRM_ERROR("failed to create device file for power method\n");

#ifdef CONFIG_ACPI
		rdev->acpi_nb.notifier_call = radeon_acpi_event;
		register_acpi_notifier(&rdev->acpi_nb);
#endif
		if (radeon_debugfs_pm_init(rdev)) {
			DRM_ERROR("Failed to register debugfs file for PM!\n");
		}

		DRM_INFO("radeon: power management initialized\n");
	}

	return 0;
}

void radeon_pm_fini(struct radeon_device *rdev)
{
	if (rdev->pm.num_power_states > 1) {
		mutex_lock(&rdev->pm.mutex);
		if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
			rdev->pm.profile = PM_PROFILE_DEFAULT;
			radeon_pm_update_profile(rdev);
			radeon_pm_set_clocks(rdev);
		} else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
			/* reset default clocks */
			rdev->pm.dynpm_state = DYNPM_STATE_DISABLED;
			rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
			radeon_pm_set_clocks(rdev);
		}
		mutex_unlock(&rdev->pm.mutex);

		cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);

		device_remove_file(rdev->dev, &dev_attr_power_profile);
		device_remove_file(rdev->dev, &dev_attr_power_method);
#ifdef CONFIG_ACPI
		unregister_acpi_notifier(&rdev->acpi_nb);
#endif
	}

	if (rdev->pm.power_state)
		kfree(rdev->pm.power_state);

	radeon_hwmon_fini(rdev);
}

void radeon_pm_compute_clocks(struct radeon_device *rdev)
{
	struct drm_device *ddev = rdev->ddev;
	struct drm_crtc *crtc;
	struct radeon_crtc *radeon_crtc;

	if (rdev->pm.num_power_states < 2)
		return;

	mutex_lock(&rdev->pm.mutex);

	rdev->pm.active_crtcs = 0;
	rdev->pm.active_crtc_count = 0;
	list_for_each_entry(crtc,
		&ddev->mode_config.crtc_list, head) {
		radeon_crtc = to_radeon_crtc(crtc);
		if (radeon_crtc->enabled) {
			rdev->pm.active_crtcs |= (1 << radeon_crtc->crtc_id);
			rdev->pm.active_crtc_count++;
		}
	}

	if (rdev->pm.pm_method == PM_METHOD_PROFILE) {
		radeon_pm_update_profile(rdev);
		radeon_pm_set_clocks(rdev);
	} else if (rdev->pm.pm_method == PM_METHOD_DYNPM) {
		if (rdev->pm.dynpm_state != DYNPM_STATE_DISABLED) {
			if (rdev->pm.active_crtc_count > 1) {
				if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) {
					cancel_delayed_work(&rdev->pm.dynpm_idle_work);

					rdev->pm.dynpm_state = DYNPM_STATE_PAUSED;
					rdev->pm.dynpm_planned_action = DYNPM_ACTION_DEFAULT;
					radeon_pm_get_dynpm_state(rdev);
					radeon_pm_set_clocks(rdev);

					DRM_DEBUG_DRIVER("radeon: dynamic power management deactivated\n");
				}
			} else if (rdev->pm.active_crtc_count == 1) {
				/* TODO: Increase clocks if needed for current mode */

				if (rdev->pm.dynpm_state == DYNPM_STATE_MINIMUM) {
					rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
					rdev->pm.dynpm_planned_action = DYNPM_ACTION_UPCLOCK;
					radeon_pm_get_dynpm_state(rdev);
					radeon_pm_set_clocks(rdev);

					schedule_delayed_work(&rdev->pm.dynpm_idle_work,
							      msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
				} else if (rdev->pm.dynpm_state == DYNPM_STATE_PAUSED) {
					rdev->pm.dynpm_state = DYNPM_STATE_ACTIVE;
					schedule_delayed_work(&rdev->pm.dynpm_idle_work,
							      msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
					DRM_DEBUG_DRIVER("radeon: dynamic power management activated\n");
				}
			} else { /* count == 0 */
				if (rdev->pm.dynpm_state != DYNPM_STATE_MINIMUM) {
					cancel_delayed_work(&rdev->pm.dynpm_idle_work);

					rdev->pm.dynpm_state = DYNPM_STATE_MINIMUM;
					rdev->pm.dynpm_planned_action = DYNPM_ACTION_MINIMUM;
					radeon_pm_get_dynpm_state(rdev);
					radeon_pm_set_clocks(rdev);
				}
			}
		}
	}

	mutex_unlock(&rdev->pm.mutex);
}

static bool radeon_pm_in_vbl(struct radeon_device *rdev)
{
	int  crtc, vpos, hpos, vbl_status;
	bool in_vbl = true;

	/* Iterate over all active crtc's. All crtc's must be in vblank,
	 * otherwise return in_vbl == false.
	 */
	for (crtc = 0; (crtc < rdev->num_crtc) && in_vbl; crtc++) {
		if (rdev->pm.active_crtcs & (1 << crtc)) {
			vbl_status = radeon_get_crtc_scanoutpos(rdev->ddev, crtc, &vpos, &hpos);
			if ((vbl_status & DRM_SCANOUTPOS_VALID) &&
			    !(vbl_status & DRM_SCANOUTPOS_INVBL))
				in_vbl = false;
		}
	}

	return in_vbl;
}

static bool radeon_pm_debug_check_in_vbl(struct radeon_device *rdev, bool finish)
{
	u32 stat_crtc = 0;
	bool in_vbl = radeon_pm_in_vbl(rdev);

	if (in_vbl == false)
		DRM_DEBUG_DRIVER("not in vbl for pm change %08x at %s\n", stat_crtc,
			 finish ? "exit" : "entry");
	return in_vbl;
}

static void radeon_dynpm_idle_work_handler(struct work_struct *work)
{
	struct radeon_device *rdev;
	int resched;
	rdev = container_of(work, struct radeon_device,
				pm.dynpm_idle_work.work);

	resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev);
	mutex_lock(&rdev->pm.mutex);
	if (rdev->pm.dynpm_state == DYNPM_STATE_ACTIVE) {
		unsigned long irq_flags;
		int not_processed = 0;

		read_lock_irqsave(&rdev->fence_drv.lock, irq_flags);
		if (!list_empty(&rdev->fence_drv.emited)) {
			struct list_head *ptr;
			list_for_each(ptr, &rdev->fence_drv.emited) {
				/* count up to 3, that's enought info */
				if (++not_processed >= 3)
					break;
			}
		}
		read_unlock_irqrestore(&rdev->fence_drv.lock, irq_flags);

		if (not_processed >= 3) { /* should upclock */
			if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_DOWNCLOCK) {
				rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
			} else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE &&
				   rdev->pm.dynpm_can_upclock) {
				rdev->pm.dynpm_planned_action =
					DYNPM_ACTION_UPCLOCK;
				rdev->pm.dynpm_action_timeout = jiffies +
				msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
			}
		} else if (not_processed == 0) { /* should downclock */
			if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_UPCLOCK) {
				rdev->pm.dynpm_planned_action = DYNPM_ACTION_NONE;
			} else if (rdev->pm.dynpm_planned_action == DYNPM_ACTION_NONE &&
				   rdev->pm.dynpm_can_downclock) {
				rdev->pm.dynpm_planned_action =
					DYNPM_ACTION_DOWNCLOCK;
				rdev->pm.dynpm_action_timeout = jiffies +
				msecs_to_jiffies(RADEON_RECLOCK_DELAY_MS);
			}
		}

		/* Note, radeon_pm_set_clocks is called with static_switch set
		 * to false since we want to wait for vbl to avoid flicker.
		 */
		if (rdev->pm.dynpm_planned_action != DYNPM_ACTION_NONE &&
		    jiffies > rdev->pm.dynpm_action_timeout) {
			radeon_pm_get_dynpm_state(rdev);
			radeon_pm_set_clocks(rdev);
		}

		schedule_delayed_work(&rdev->pm.dynpm_idle_work,
				      msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
	}
	mutex_unlock(&rdev->pm.mutex);
	ttm_bo_unlock_delayed_workqueue(&rdev->mman.bdev, resched);
}

/*
 * Debugfs info
 */
#if defined(CONFIG_DEBUG_FS)

static int radeon_debugfs_pm_info(struct seq_file *m, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	struct radeon_device *rdev = dev->dev_private;

	seq_printf(m, "default engine clock: %u0 kHz\n", rdev->pm.default_sclk);
	seq_printf(m, "current engine clock: %u0 kHz\n", radeon_get_engine_clock(rdev));
	seq_printf(m, "default memory clock: %u0 kHz\n", rdev->pm.default_mclk);
	if (rdev->asic->get_memory_clock)
		seq_printf(m, "current memory clock: %u0 kHz\n", radeon_get_memory_clock(rdev));
	if (rdev->pm.current_vddc)
		seq_printf(m, "voltage: %u mV\n", rdev->pm.current_vddc);
	if (rdev->asic->get_pcie_lanes)
		seq_printf(m, "PCIE lanes: %d\n", radeon_get_pcie_lanes(rdev));

	return 0;
}

static struct drm_info_list radeon_pm_info_list[] = {
	{"radeon_pm_info", radeon_debugfs_pm_info, 0, NULL},
};
#endif

static int radeon_debugfs_pm_init(struct radeon_device *rdev)
{
#if defined(CONFIG_DEBUG_FS)
	return radeon_debugfs_add_files(rdev, radeon_pm_info_list, ARRAY_SIZE(radeon_pm_info_list));
#else
	return 0;
#endif
}
OpenPOWER on IntegriCloud