forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathdrm_client_modeset.c
1239 lines (1035 loc) · 32.2 KB
/
drm_client_modeset.c
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
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// SPDX-License-Identifier: MIT
/*
* Copyright 2018 Noralf Trønnes
* Copyright (c) 2006-2009 Red Hat Inc.
* Copyright (c) 2006-2008 Intel Corporation
* Jesse Barnes <[email protected]>
* Copyright (c) 2007 Dave Airlie <[email protected]>
*/
#include "drm/drm_modeset_lock.h"
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/string_helpers.h>
#include <drm/drm_atomic.h>
#include <drm/drm_client.h>
#include <drm/drm_connector.h>
#include <drm/drm_crtc.h>
#include <drm/drm_device.h>
#include <drm/drm_drv.h>
#include <drm/drm_edid.h>
#include <drm/drm_encoder.h>
#include <drm/drm_print.h>
#include "drm_crtc_internal.h"
#include "drm_internal.h"
#define DRM_CLIENT_MAX_CLONED_CONNECTORS 8
struct drm_client_offset {
int x, y;
};
int drm_client_modeset_create(struct drm_client_dev *client)
{
struct drm_device *dev = client->dev;
unsigned int num_crtc = dev->mode_config.num_crtc;
unsigned int max_connector_count = 1;
struct drm_mode_set *modeset;
struct drm_crtc *crtc;
unsigned int i = 0;
/* Add terminating zero entry to enable index less iteration */
client->modesets = kcalloc(num_crtc + 1, sizeof(*client->modesets), GFP_KERNEL);
if (!client->modesets)
return -ENOMEM;
mutex_init(&client->modeset_mutex);
drm_for_each_crtc(crtc, dev)
client->modesets[i++].crtc = crtc;
/* Cloning is only supported in the single crtc case. */
if (num_crtc == 1)
max_connector_count = DRM_CLIENT_MAX_CLONED_CONNECTORS;
for (modeset = client->modesets; modeset->crtc; modeset++) {
modeset->connectors = kcalloc(max_connector_count,
sizeof(*modeset->connectors), GFP_KERNEL);
if (!modeset->connectors)
goto err_free;
}
return 0;
err_free:
drm_client_modeset_free(client);
return -ENOMEM;
}
static void drm_client_modeset_release(struct drm_client_dev *client)
{
struct drm_mode_set *modeset;
unsigned int i;
drm_client_for_each_modeset(modeset, client) {
drm_mode_destroy(client->dev, modeset->mode);
modeset->mode = NULL;
modeset->fb = NULL;
for (i = 0; i < modeset->num_connectors; i++) {
drm_connector_put(modeset->connectors[i]);
modeset->connectors[i] = NULL;
}
modeset->num_connectors = 0;
}
}
void drm_client_modeset_free(struct drm_client_dev *client)
{
struct drm_mode_set *modeset;
mutex_lock(&client->modeset_mutex);
drm_client_modeset_release(client);
drm_client_for_each_modeset(modeset, client)
kfree(modeset->connectors);
mutex_unlock(&client->modeset_mutex);
mutex_destroy(&client->modeset_mutex);
kfree(client->modesets);
}
static struct drm_mode_set *
drm_client_find_modeset(struct drm_client_dev *client, struct drm_crtc *crtc)
{
struct drm_mode_set *modeset;
drm_client_for_each_modeset(modeset, client)
if (modeset->crtc == crtc)
return modeset;
return NULL;
}
static struct drm_display_mode *
drm_connector_get_tiled_mode(struct drm_connector *connector)
{
struct drm_display_mode *mode;
list_for_each_entry(mode, &connector->modes, head) {
if (mode->hdisplay == connector->tile_h_size &&
mode->vdisplay == connector->tile_v_size)
return mode;
}
return NULL;
}
static struct drm_display_mode *
drm_connector_fallback_non_tiled_mode(struct drm_connector *connector)
{
struct drm_display_mode *mode;
list_for_each_entry(mode, &connector->modes, head) {
if (mode->hdisplay == connector->tile_h_size &&
mode->vdisplay == connector->tile_v_size)
continue;
return mode;
}
return NULL;
}
static struct drm_display_mode *
drm_connector_has_preferred_mode(struct drm_connector *connector, int width, int height)
{
struct drm_display_mode *mode;
list_for_each_entry(mode, &connector->modes, head) {
if (mode->hdisplay > width ||
mode->vdisplay > height)
continue;
if (mode->type & DRM_MODE_TYPE_PREFERRED)
return mode;
}
return NULL;
}
static struct drm_display_mode *drm_connector_pick_cmdline_mode(struct drm_connector *connector)
{
struct drm_cmdline_mode *cmdline_mode;
struct drm_display_mode *mode;
bool prefer_non_interlace;
/*
* Find a user-defined mode. If the user gave us a valid
* mode on the kernel command line, it will show up in this
* list.
*/
list_for_each_entry(mode, &connector->modes, head) {
if (mode->type & DRM_MODE_TYPE_USERDEF)
return mode;
}
cmdline_mode = &connector->cmdline_mode;
if (cmdline_mode->specified == false)
return NULL;
/*
* Attempt to find a matching mode in the list of modes we
* have gotten so far.
*/
prefer_non_interlace = !cmdline_mode->interlace;
again:
list_for_each_entry(mode, &connector->modes, head) {
/* check width/height */
if (mode->hdisplay != cmdline_mode->xres ||
mode->vdisplay != cmdline_mode->yres)
continue;
if (cmdline_mode->refresh_specified) {
if (drm_mode_vrefresh(mode) != cmdline_mode->refresh)
continue;
}
if (cmdline_mode->interlace) {
if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
continue;
} else if (prefer_non_interlace) {
if (mode->flags & DRM_MODE_FLAG_INTERLACE)
continue;
}
return mode;
}
if (prefer_non_interlace) {
prefer_non_interlace = false;
goto again;
}
return NULL;
}
static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
{
bool enable;
if (connector->display_info.non_desktop)
return false;
if (strict)
enable = connector->status == connector_status_connected;
else
enable = connector->status != connector_status_disconnected;
return enable;
}
static void drm_client_connectors_enabled(struct drm_connector **connectors,
unsigned int connector_count,
bool *enabled)
{
bool any_enabled = false;
struct drm_connector *connector;
int i = 0;
for (i = 0; i < connector_count; i++) {
connector = connectors[i];
enabled[i] = drm_connector_enabled(connector, true);
DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
connector->display_info.non_desktop ? "non desktop" : str_yes_no(enabled[i]));
any_enabled |= enabled[i];
}
if (any_enabled)
return;
for (i = 0; i < connector_count; i++)
enabled[i] = drm_connector_enabled(connectors[i], false);
}
static bool drm_client_target_cloned(struct drm_device *dev,
struct drm_connector **connectors,
unsigned int connector_count,
struct drm_display_mode **modes,
struct drm_client_offset *offsets,
bool *enabled, int width, int height)
{
int count, i, j;
bool can_clone = false;
struct drm_display_mode *dmt_mode, *mode;
/* only contemplate cloning in the single crtc case */
if (dev->mode_config.num_crtc > 1)
return false;
count = 0;
for (i = 0; i < connector_count; i++) {
if (enabled[i])
count++;
}
/* only contemplate cloning if more than one connector is enabled */
if (count <= 1)
return false;
/* check the command line or if nothing common pick 1024x768 */
can_clone = true;
for (i = 0; i < connector_count; i++) {
if (!enabled[i])
continue;
modes[i] = drm_connector_pick_cmdline_mode(connectors[i]);
if (!modes[i]) {
can_clone = false;
break;
}
for (j = 0; j < i; j++) {
if (!enabled[j])
continue;
if (!drm_mode_match(modes[j], modes[i],
DRM_MODE_MATCH_TIMINGS |
DRM_MODE_MATCH_CLOCK |
DRM_MODE_MATCH_FLAGS |
DRM_MODE_MATCH_3D_FLAGS))
can_clone = false;
}
}
if (can_clone) {
DRM_DEBUG_KMS("can clone using command line\n");
return true;
}
/* try and find a 1024x768 mode on each connector */
can_clone = true;
dmt_mode = drm_mode_find_dmt(dev, 1024, 768, 60, false);
for (i = 0; i < connector_count; i++) {
if (!enabled[i])
continue;
list_for_each_entry(mode, &connectors[i]->modes, head) {
if (drm_mode_match(mode, dmt_mode,
DRM_MODE_MATCH_TIMINGS |
DRM_MODE_MATCH_CLOCK |
DRM_MODE_MATCH_FLAGS |
DRM_MODE_MATCH_3D_FLAGS))
modes[i] = mode;
}
if (!modes[i])
can_clone = false;
}
if (can_clone) {
DRM_DEBUG_KMS("can clone using 1024x768\n");
return true;
}
DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
return false;
}
static int drm_client_get_tile_offsets(struct drm_connector **connectors,
unsigned int connector_count,
struct drm_display_mode **modes,
struct drm_client_offset *offsets,
int idx,
int h_idx, int v_idx)
{
struct drm_connector *connector;
int i;
int hoffset = 0, voffset = 0;
for (i = 0; i < connector_count; i++) {
connector = connectors[i];
if (!connector->has_tile)
continue;
if (!modes[i] && (h_idx || v_idx)) {
DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i,
connector->base.id);
continue;
}
if (connector->tile_h_loc < h_idx)
hoffset += modes[i]->hdisplay;
if (connector->tile_v_loc < v_idx)
voffset += modes[i]->vdisplay;
}
offsets[idx].x = hoffset;
offsets[idx].y = voffset;
DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx);
return 0;
}
static bool drm_client_target_preferred(struct drm_connector **connectors,
unsigned int connector_count,
struct drm_display_mode **modes,
struct drm_client_offset *offsets,
bool *enabled, int width, int height)
{
const u64 mask = BIT_ULL(connector_count) - 1;
struct drm_connector *connector;
u64 conn_configured = 0;
int tile_pass = 0;
int num_tiled_conns = 0;
int i;
for (i = 0; i < connector_count; i++) {
if (connectors[i]->has_tile &&
connectors[i]->status == connector_status_connected)
num_tiled_conns++;
}
retry:
for (i = 0; i < connector_count; i++) {
connector = connectors[i];
if (conn_configured & BIT_ULL(i))
continue;
if (enabled[i] == false) {
conn_configured |= BIT_ULL(i);
continue;
}
/* first pass over all the untiled connectors */
if (tile_pass == 0 && connector->has_tile)
continue;
if (tile_pass == 1) {
if (connector->tile_h_loc != 0 ||
connector->tile_v_loc != 0)
continue;
} else {
if (connector->tile_h_loc != tile_pass - 1 &&
connector->tile_v_loc != tile_pass - 1)
/* if this tile_pass doesn't cover any of the tiles - keep going */
continue;
/*
* find the tile offsets for this pass - need to find
* all tiles left and above
*/
drm_client_get_tile_offsets(connectors, connector_count, modes, offsets, i,
connector->tile_h_loc, connector->tile_v_loc);
}
DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
connector->base.id);
/* got for command line mode first */
modes[i] = drm_connector_pick_cmdline_mode(connector);
if (!modes[i]) {
DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n",
connector->base.id, connector->tile_group ? connector->tile_group->id : 0);
modes[i] = drm_connector_has_preferred_mode(connector, width, height);
}
/* No preferred modes, pick one off the list */
if (!modes[i] && !list_empty(&connector->modes)) {
list_for_each_entry(modes[i], &connector->modes, head)
break;
}
/*
* In case of tiled mode if all tiles not present fallback to
* first available non tiled mode.
* After all tiles are present, try to find the tiled mode
* for all and if tiled mode not present due to fbcon size
* limitations, use first non tiled mode only for
* tile 0,0 and set to no mode for all other tiles.
*/
if (connector->has_tile) {
if (num_tiled_conns <
connector->num_h_tile * connector->num_v_tile ||
(connector->tile_h_loc == 0 &&
connector->tile_v_loc == 0 &&
!drm_connector_get_tiled_mode(connector))) {
DRM_DEBUG_KMS("Falling back to non tiled mode on Connector %d\n",
connector->base.id);
modes[i] = drm_connector_fallback_non_tiled_mode(connector);
} else {
modes[i] = drm_connector_get_tiled_mode(connector);
}
}
DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
"none");
conn_configured |= BIT_ULL(i);
}
if ((conn_configured & mask) != mask) {
tile_pass++;
goto retry;
}
return true;
}
static bool connector_has_possible_crtc(struct drm_connector *connector,
struct drm_crtc *crtc)
{
struct drm_encoder *encoder;
drm_connector_for_each_possible_encoder(connector, encoder) {
if (encoder->possible_crtcs & drm_crtc_mask(crtc))
return true;
}
return false;
}
static int drm_client_pick_crtcs(struct drm_client_dev *client,
struct drm_connector **connectors,
unsigned int connector_count,
struct drm_crtc **best_crtcs,
struct drm_display_mode **modes,
int n, int width, int height)
{
struct drm_device *dev = client->dev;
struct drm_connector *connector;
int my_score, best_score, score;
struct drm_crtc **crtcs, *crtc;
struct drm_mode_set *modeset;
int o;
if (n == connector_count)
return 0;
connector = connectors[n];
best_crtcs[n] = NULL;
best_score = drm_client_pick_crtcs(client, connectors, connector_count,
best_crtcs, modes, n + 1, width, height);
if (modes[n] == NULL)
return best_score;
crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL);
if (!crtcs)
return best_score;
my_score = 1;
if (connector->status == connector_status_connected)
my_score++;
if (connector->cmdline_mode.specified)
my_score++;
if (drm_connector_has_preferred_mode(connector, width, height))
my_score++;
/*
* select a crtc for this connector and then attempt to configure
* remaining connectors
*/
drm_client_for_each_modeset(modeset, client) {
crtc = modeset->crtc;
if (!connector_has_possible_crtc(connector, crtc))
continue;
for (o = 0; o < n; o++)
if (best_crtcs[o] == crtc)
break;
if (o < n) {
/* ignore cloning unless only a single crtc */
if (dev->mode_config.num_crtc > 1)
continue;
if (!drm_mode_equal(modes[o], modes[n]))
continue;
}
crtcs[n] = crtc;
memcpy(crtcs, best_crtcs, n * sizeof(*crtcs));
score = my_score + drm_client_pick_crtcs(client, connectors, connector_count,
crtcs, modes, n + 1, width, height);
if (score > best_score) {
best_score = score;
memcpy(best_crtcs, crtcs, connector_count * sizeof(*crtcs));
}
}
kfree(crtcs);
return best_score;
}
/* Try to read the BIOS display configuration and use it for the initial config */
static bool drm_client_firmware_config(struct drm_client_dev *client,
struct drm_connector **connectors,
unsigned int connector_count,
struct drm_crtc **crtcs,
struct drm_display_mode **modes,
struct drm_client_offset *offsets,
bool *enabled, int width, int height)
{
const int count = min_t(unsigned int, connector_count, BITS_PER_LONG);
unsigned long conn_configured, conn_seq, mask;
struct drm_device *dev = client->dev;
int i, j;
bool *save_enabled;
bool fallback = true, ret = true;
int num_connectors_enabled = 0;
int num_connectors_detected = 0;
int num_tiled_conns = 0;
struct drm_modeset_acquire_ctx ctx;
if (!drm_drv_uses_atomic_modeset(dev))
return false;
if (WARN_ON(count <= 0))
return false;
save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL);
if (!save_enabled)
return false;
drm_modeset_acquire_init(&ctx, 0);
while (drm_modeset_lock_all_ctx(dev, &ctx) != 0)
drm_modeset_backoff(&ctx);
memcpy(save_enabled, enabled, count);
mask = GENMASK(count - 1, 0);
conn_configured = 0;
for (i = 0; i < count; i++) {
if (connectors[i]->has_tile &&
connectors[i]->status == connector_status_connected)
num_tiled_conns++;
}
retry:
conn_seq = conn_configured;
for (i = 0; i < count; i++) {
struct drm_connector *connector;
struct drm_encoder *encoder;
struct drm_crtc *new_crtc;
connector = connectors[i];
if (conn_configured & BIT(i))
continue;
if (conn_seq == 0 && !connector->has_tile)
continue;
if (connector->status == connector_status_connected)
num_connectors_detected++;
if (!enabled[i]) {
DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
connector->name);
conn_configured |= BIT(i);
continue;
}
if (connector->force == DRM_FORCE_OFF) {
DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
connector->name);
enabled[i] = false;
continue;
}
encoder = connector->state->best_encoder;
if (!encoder || WARN_ON(!connector->state->crtc)) {
if (connector->force > DRM_FORCE_OFF)
goto bail;
DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
connector->name);
enabled[i] = false;
conn_configured |= BIT(i);
continue;
}
num_connectors_enabled++;
new_crtc = connector->state->crtc;
/*
* Make sure we're not trying to drive multiple connectors
* with a single CRTC, since our cloning support may not
* match the BIOS.
*/
for (j = 0; j < count; j++) {
if (crtcs[j] == new_crtc) {
DRM_DEBUG_KMS("fallback: cloned configuration\n");
goto bail;
}
}
DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
connector->name);
/* go for command line mode first */
modes[i] = drm_connector_pick_cmdline_mode(connector);
/* try for preferred next */
if (!modes[i]) {
DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
connector->name, connector->has_tile);
modes[i] = drm_connector_has_preferred_mode(connector, width, height);
}
/* No preferred mode marked by the EDID? Are there any modes? */
if (!modes[i] && !list_empty(&connector->modes)) {
DRM_DEBUG_KMS("using first mode listed on connector %s\n",
connector->name);
modes[i] = list_first_entry(&connector->modes,
struct drm_display_mode,
head);
}
/* last resort: use current mode */
if (!modes[i]) {
/*
* IMPORTANT: We want to use the adjusted mode (i.e.
* after the panel fitter upscaling) as the initial
* config, not the input mode, which is what crtc->mode
* usually contains. But since our current
* code puts a mode derived from the post-pfit timings
* into crtc->mode this works out correctly.
*
* This is crtc->mode and not crtc->state->mode for the
* fastboot check to work correctly.
*/
DRM_DEBUG_KMS("looking for current mode on connector %s\n",
connector->name);
modes[i] = &connector->state->crtc->mode;
}
/*
* In case of tiled modes, if all tiles are not present
* then fallback to a non tiled mode.
*/
if (connector->has_tile &&
num_tiled_conns < connector->num_h_tile * connector->num_v_tile) {
DRM_DEBUG_KMS("Falling back to non tiled mode on Connector %d\n",
connector->base.id);
modes[i] = drm_connector_fallback_non_tiled_mode(connector);
}
crtcs[i] = new_crtc;
DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n",
connector->name,
connector->state->crtc->base.id,
connector->state->crtc->name,
modes[i]->hdisplay, modes[i]->vdisplay,
modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" : "");
fallback = false;
conn_configured |= BIT(i);
}
if ((conn_configured & mask) != mask && conn_configured != conn_seq)
goto retry;
/*
* If the BIOS didn't enable everything it could, fall back to have the
* same user experiencing of lighting up as much as possible like the
* fbdev helper library.
*/
if (num_connectors_enabled != num_connectors_detected &&
num_connectors_enabled < dev->mode_config.num_crtc) {
DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
num_connectors_detected);
fallback = true;
}
if (fallback) {
bail:
DRM_DEBUG_KMS("Not using firmware configuration\n");
memcpy(enabled, save_enabled, count);
ret = false;
}
drm_modeset_drop_locks(&ctx);
drm_modeset_acquire_fini(&ctx);
kfree(save_enabled);
return ret;
}
/**
* drm_client_modeset_probe() - Probe for displays
* @client: DRM client
* @width: Maximum display mode width (optional)
* @height: Maximum display mode height (optional)
*
* This function sets up display pipelines for enabled connectors and stores the
* config in the client's modeset array.
*
* Returns:
* Zero on success or negative error code on failure.
*/
int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width, unsigned int height)
{
struct drm_connector *connector, **connectors = NULL;
struct drm_connector_list_iter conn_iter;
struct drm_device *dev = client->dev;
unsigned int total_modes_count = 0;
struct drm_client_offset *offsets;
unsigned int connector_count = 0;
struct drm_display_mode **modes;
struct drm_crtc **crtcs;
int i, ret = 0;
bool *enabled;
DRM_DEBUG_KMS("\n");
if (!width)
width = dev->mode_config.max_width;
if (!height)
height = dev->mode_config.max_height;
drm_connector_list_iter_begin(dev, &conn_iter);
drm_client_for_each_connector_iter(connector, &conn_iter) {
struct drm_connector **tmp;
tmp = krealloc(connectors, (connector_count + 1) * sizeof(*connectors), GFP_KERNEL);
if (!tmp) {
ret = -ENOMEM;
goto free_connectors;
}
connectors = tmp;
drm_connector_get(connector);
connectors[connector_count++] = connector;
}
drm_connector_list_iter_end(&conn_iter);
if (!connector_count)
return 0;
crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL);
modes = kcalloc(connector_count, sizeof(*modes), GFP_KERNEL);
offsets = kcalloc(connector_count, sizeof(*offsets), GFP_KERNEL);
enabled = kcalloc(connector_count, sizeof(bool), GFP_KERNEL);
if (!crtcs || !modes || !enabled || !offsets) {
DRM_ERROR("Memory allocation failed\n");
ret = -ENOMEM;
goto out;
}
mutex_lock(&client->modeset_mutex);
mutex_lock(&dev->mode_config.mutex);
for (i = 0; i < connector_count; i++)
total_modes_count += connectors[i]->funcs->fill_modes(connectors[i], width, height);
if (!total_modes_count)
DRM_DEBUG_KMS("No connectors reported connected with modes\n");
drm_client_connectors_enabled(connectors, connector_count, enabled);
if (!drm_client_firmware_config(client, connectors, connector_count, crtcs,
modes, offsets, enabled, width, height)) {
memset(modes, 0, connector_count * sizeof(*modes));
memset(crtcs, 0, connector_count * sizeof(*crtcs));
memset(offsets, 0, connector_count * sizeof(*offsets));
if (!drm_client_target_cloned(dev, connectors, connector_count, modes,
offsets, enabled, width, height) &&
!drm_client_target_preferred(connectors, connector_count, modes,
offsets, enabled, width, height))
DRM_ERROR("Unable to find initial modes\n");
DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n",
width, height);
drm_client_pick_crtcs(client, connectors, connector_count,
crtcs, modes, 0, width, height);
}
mutex_unlock(&dev->mode_config.mutex);
drm_client_modeset_release(client);
for (i = 0; i < connector_count; i++) {
struct drm_display_mode *mode = modes[i];
struct drm_crtc *crtc = crtcs[i];
struct drm_client_offset *offset = &offsets[i];
if (mode && crtc) {
struct drm_mode_set *modeset = drm_client_find_modeset(client, crtc);
struct drm_connector *connector = connectors[i];
DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n",
mode->name, crtc->base.id, offset->x, offset->y);
if (WARN_ON_ONCE(modeset->num_connectors == DRM_CLIENT_MAX_CLONED_CONNECTORS ||
(dev->mode_config.num_crtc > 1 && modeset->num_connectors == 1))) {
ret = -EINVAL;
break;
}
modeset->mode = drm_mode_duplicate(dev, mode);
drm_connector_get(connector);
modeset->connectors[modeset->num_connectors++] = connector;
modeset->x = offset->x;
modeset->y = offset->y;
}
}
mutex_unlock(&client->modeset_mutex);
out:
kfree(crtcs);
kfree(modes);
kfree(offsets);
kfree(enabled);
free_connectors:
for (i = 0; i < connector_count; i++)
drm_connector_put(connectors[i]);
kfree(connectors);
return ret;
}
EXPORT_SYMBOL(drm_client_modeset_probe);
/**
* drm_client_rotation() - Check the initial rotation value
* @modeset: DRM modeset
* @rotation: Returned rotation value
*
* This function checks if the primary plane in @modeset can hw rotate
* to match the rotation needed on its connector.
*
* Note: Currently only 0 and 180 degrees are supported.
*
* Return:
* True if the plane can do the rotation, false otherwise.
*/
bool drm_client_rotation(struct drm_mode_set *modeset, unsigned int *rotation)
{
struct drm_connector *connector = modeset->connectors[0];
struct drm_plane *plane = modeset->crtc->primary;
struct drm_cmdline_mode *cmdline;
u64 valid_mask = 0;
unsigned int i;
if (!modeset->num_connectors)
return false;
switch (connector->display_info.panel_orientation) {
case DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP:
*rotation = DRM_MODE_ROTATE_180;
break;
case DRM_MODE_PANEL_ORIENTATION_LEFT_UP:
*rotation = DRM_MODE_ROTATE_90;
break;
case DRM_MODE_PANEL_ORIENTATION_RIGHT_UP:
*rotation = DRM_MODE_ROTATE_270;
break;
default:
*rotation = DRM_MODE_ROTATE_0;
}
/**
* The panel already defined the default rotation
* through its orientation. Whatever has been provided
* on the command line needs to be added to that.
*
* Unfortunately, the rotations are at different bit
* indices, so the math to add them up are not as
* trivial as they could.
*
* Reflections on the other hand are pretty trivial to deal with, a
* simple XOR between the two handle the addition nicely.
*/
cmdline = &connector->cmdline_mode;
if (cmdline->specified && cmdline->rotation_reflection) {
unsigned int cmdline_rest, panel_rest;
unsigned int cmdline_rot, panel_rot;
unsigned int sum_rot, sum_rest;
panel_rot = ilog2(*rotation & DRM_MODE_ROTATE_MASK);
cmdline_rot = ilog2(cmdline->rotation_reflection & DRM_MODE_ROTATE_MASK);
sum_rot = (panel_rot + cmdline_rot) % 4;
panel_rest = *rotation & ~DRM_MODE_ROTATE_MASK;
cmdline_rest = cmdline->rotation_reflection & ~DRM_MODE_ROTATE_MASK;
sum_rest = panel_rest ^ cmdline_rest;
*rotation = (1 << sum_rot) | sum_rest;
}
/*
* TODO: support 90 / 270 degree hardware rotation,
* depending on the hardware this may require the framebuffer
* to be in a specific tiling format.
*/
if (((*rotation & DRM_MODE_ROTATE_MASK) != DRM_MODE_ROTATE_0 &&
(*rotation & DRM_MODE_ROTATE_MASK) != DRM_MODE_ROTATE_180) ||
!plane->rotation_property)
return false;
for (i = 0; i < plane->rotation_property->num_values; i++)
valid_mask |= (1ULL << plane->rotation_property->values[i]);
if (!(*rotation & valid_mask))
return false;
return true;
}
EXPORT_SYMBOL(drm_client_rotation);
static int drm_client_modeset_commit_atomic(struct drm_client_dev *client, bool active, bool check)
{
struct drm_device *dev = client->dev;
struct drm_plane *plane;
struct drm_atomic_state *state;
struct drm_modeset_acquire_ctx ctx;
struct drm_mode_set *mode_set;
int ret;
drm_modeset_acquire_init(&ctx, 0);
state = drm_atomic_state_alloc(dev);
if (!state) {
ret = -ENOMEM;
goto out_ctx;
}
state->acquire_ctx = &ctx;
retry:
drm_for_each_plane(plane, dev) {
struct drm_plane_state *plane_state;
plane_state = drm_atomic_get_plane_state(state, plane);
if (IS_ERR(plane_state)) {
ret = PTR_ERR(plane_state);
goto out_state;