summaryrefslogtreecommitdiff
path: root/drivers/media/platform/qcom/camss/camss-video.c
blob: 114c3ae4a4abb3f214eb4536ed0f1a31615537d4 (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
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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
// SPDX-License-Identifier: GPL-2.0
/*
 * camss-video.c
 *
 * Qualcomm MSM Camera Subsystem - V4L2 device node
 *
 * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
 * Copyright (C) 2015-2018 Linaro Ltd.
 */
#include <linux/slab.h>
#include <media/media-entity.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-mc.h>
#include <media/videobuf2-dma-sg.h>

#include "camss-video.h"
#include "camss.h"

#define CAMSS_FRAME_MIN_WIDTH		1
#define CAMSS_FRAME_MAX_WIDTH		8191
#define CAMSS_FRAME_MIN_HEIGHT		1
#define CAMSS_FRAME_MAX_HEIGHT_RDI	8191
#define CAMSS_FRAME_MAX_HEIGHT_PIX	4096

struct fract {
	u8 numerator;
	u8 denominator;
};

/*
 * struct camss_format_info - ISP media bus format information
 * @code: V4L2 media bus format code
 * @pixelformat: V4L2 pixel format FCC identifier
 * @planes: Number of planes
 * @hsub: Horizontal subsampling (for each plane)
 * @vsub: Vertical subsampling (for each plane)
 * @bpp: Bits per pixel when stored in memory (for each plane)
 */
struct camss_format_info {
	u32 code;
	u32 pixelformat;
	u8 planes;
	struct fract hsub[3];
	struct fract vsub[3];
	unsigned int bpp[3];
};

static const struct camss_format_info formats_rdi_8x16[] = {
	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_UYVY, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_VYUY, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_YUYV, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_YVYU, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
	{ MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_PIX_FMT_SBGGR8, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
	{ MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_PIX_FMT_SGBRG8, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
	{ MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_PIX_FMT_SGRBG8, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
	{ MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_PIX_FMT_SRGGB8, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
	{ MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_PIX_FMT_SBGGR10P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
	{ MEDIA_BUS_FMT_SGBRG10_1X10, V4L2_PIX_FMT_SGBRG10P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
	{ MEDIA_BUS_FMT_SGRBG10_1X10, V4L2_PIX_FMT_SGRBG10P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
	{ MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_PIX_FMT_SRGGB10P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
	{ MEDIA_BUS_FMT_SBGGR12_1X12, V4L2_PIX_FMT_SBGGR12P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
	{ MEDIA_BUS_FMT_SGBRG12_1X12, V4L2_PIX_FMT_SGBRG12P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
	{ MEDIA_BUS_FMT_SGRBG12_1X12, V4L2_PIX_FMT_SGRBG12P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
	{ MEDIA_BUS_FMT_SRGGB12_1X12, V4L2_PIX_FMT_SRGGB12P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
	{ MEDIA_BUS_FMT_Y10_1X10, V4L2_PIX_FMT_Y10P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
};

static const struct camss_format_info formats_rdi_8x96[] = {
	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_UYVY, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_VYUY, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_YUYV, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_YVYU, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
	{ MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_PIX_FMT_SBGGR8, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
	{ MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_PIX_FMT_SGBRG8, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
	{ MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_PIX_FMT_SGRBG8, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
	{ MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_PIX_FMT_SRGGB8, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
	{ MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_PIX_FMT_SBGGR10P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
	{ MEDIA_BUS_FMT_SGBRG10_1X10, V4L2_PIX_FMT_SGBRG10P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
	{ MEDIA_BUS_FMT_SGRBG10_1X10, V4L2_PIX_FMT_SGRBG10P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
	{ MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_PIX_FMT_SRGGB10P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
	{ MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_PIX_FMT_SBGGR10, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
	{ MEDIA_BUS_FMT_SBGGR12_1X12, V4L2_PIX_FMT_SBGGR12P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
	{ MEDIA_BUS_FMT_SGBRG12_1X12, V4L2_PIX_FMT_SGBRG12P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
	{ MEDIA_BUS_FMT_SGRBG12_1X12, V4L2_PIX_FMT_SGRBG12P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
	{ MEDIA_BUS_FMT_SRGGB12_1X12, V4L2_PIX_FMT_SRGGB12P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
	{ MEDIA_BUS_FMT_SBGGR14_1X14, V4L2_PIX_FMT_SBGGR14P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 14 } },
	{ MEDIA_BUS_FMT_SGBRG14_1X14, V4L2_PIX_FMT_SGBRG14P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 14 } },
	{ MEDIA_BUS_FMT_SGRBG14_1X14, V4L2_PIX_FMT_SGRBG14P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 14 } },
	{ MEDIA_BUS_FMT_SRGGB14_1X14, V4L2_PIX_FMT_SRGGB14P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 14 } },
	{ MEDIA_BUS_FMT_Y10_1X10, V4L2_PIX_FMT_Y10P, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
	{ MEDIA_BUS_FMT_Y10_2X8_PADHI_LE, V4L2_PIX_FMT_Y10, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
};

static const struct camss_format_info formats_pix_8x16[] = {
	{ MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV12, 1,
	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
	{ MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV12, 1,
	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
	{ MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
	{ MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
	{ MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV21, 1,
	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
	{ MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV21, 1,
	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
	{ MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
	{ MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV16, 1,
	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV16, 1,
	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV16, 1,
	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV16, 1,
	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV61, 1,
	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV61, 1,
	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV61, 1,
	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV61, 1,
	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
};

static const struct camss_format_info formats_pix_8x96[] = {
	{ MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV12, 1,
	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
	{ MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV12, 1,
	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
	{ MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
	{ MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
	{ MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV21, 1,
	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
	{ MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV21, 1,
	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
	{ MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
	{ MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV16, 1,
	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV16, 1,
	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV16, 1,
	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV16, 1,
	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV61, 1,
	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV61, 1,
	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV61, 1,
	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV61, 1,
	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_UYVY, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_VYUY, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_YUYV, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_YVYU, 1,
	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
};

/* -----------------------------------------------------------------------------
 * Helper functions
 */

static int video_find_format(u32 code, u32 pixelformat,
			     const struct camss_format_info *formats,
			     unsigned int nformats)
{
	int i;

	for (i = 0; i < nformats; i++) {
		if (formats[i].code == code &&
		    formats[i].pixelformat == pixelformat)
			return i;
	}

	for (i = 0; i < nformats; i++)
		if (formats[i].code == code)
			return i;

	WARN_ON(1);

	return -EINVAL;
}

/*
 * video_mbus_to_pix_mp - Convert v4l2_mbus_framefmt to v4l2_pix_format_mplane
 * @mbus: v4l2_mbus_framefmt format (input)
 * @pix: v4l2_pix_format_mplane format (output)
 * @f: a pointer to formats array element to be used for the conversion
 * @alignment: bytesperline alignment value
 *
 * Fill the output pix structure with information from the input mbus format.
 *
 * Return 0 on success or a negative error code otherwise
 */
static int video_mbus_to_pix_mp(const struct v4l2_mbus_framefmt *mbus,
				struct v4l2_pix_format_mplane *pix,
				const struct camss_format_info *f,
				unsigned int alignment)
{
	unsigned int i;
	u32 bytesperline;

	memset(pix, 0, sizeof(*pix));
	v4l2_fill_pix_format_mplane(pix, mbus);
	pix->pixelformat = f->pixelformat;
	pix->num_planes = f->planes;
	for (i = 0; i < pix->num_planes; i++) {
		bytesperline = pix->width / f->hsub[i].numerator *
			f->hsub[i].denominator * f->bpp[i] / 8;
		bytesperline = ALIGN(bytesperline, alignment);
		pix->plane_fmt[i].bytesperline = bytesperline;
		pix->plane_fmt[i].sizeimage = pix->height /
				f->vsub[i].numerator * f->vsub[i].denominator *
				bytesperline;
	}

	return 0;
}

static struct v4l2_subdev *video_remote_subdev(struct camss_video *video,
					       u32 *pad)
{
	struct media_pad *remote;

	remote = media_entity_remote_pad(&video->pad);

	if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
		return NULL;

	if (pad)
		*pad = remote->index;

	return media_entity_to_v4l2_subdev(remote->entity);
}

static int video_get_subdev_format(struct camss_video *video,
				   struct v4l2_format *format)
{
	struct v4l2_subdev_format fmt;
	struct v4l2_subdev *subdev;
	u32 pad;
	int ret;

	subdev = video_remote_subdev(video, &pad);
	if (subdev == NULL)
		return -EPIPE;

	fmt.pad = pad;
	fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;

	ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
	if (ret)
		return ret;

	ret = video_find_format(fmt.format.code,
				format->fmt.pix_mp.pixelformat,
				video->formats, video->nformats);
	if (ret < 0)
		return ret;

	format->type = video->type;

	return video_mbus_to_pix_mp(&fmt.format, &format->fmt.pix_mp,
				    &video->formats[ret], video->bpl_alignment);
}

/* -----------------------------------------------------------------------------
 * Video queue operations
 */

static int video_queue_setup(struct vb2_queue *q,
	unsigned int *num_buffers, unsigned int *num_planes,
	unsigned int sizes[], struct device *alloc_devs[])
{
	struct camss_video *video = vb2_get_drv_priv(q);
	const struct v4l2_pix_format_mplane *format =
						&video->active_fmt.fmt.pix_mp;
	unsigned int i;

	if (*num_planes) {
		if (*num_planes != format->num_planes)
			return -EINVAL;

		for (i = 0; i < *num_planes; i++)
			if (sizes[i] < format->plane_fmt[i].sizeimage)
				return -EINVAL;

		return 0;
	}

	*num_planes = format->num_planes;

	for (i = 0; i < *num_planes; i++)
		sizes[i] = format->plane_fmt[i].sizeimage;

	return 0;
}

static int video_buf_init(struct vb2_buffer *vb)
{
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue);
	struct camss_buffer *buffer = container_of(vbuf, struct camss_buffer,
						   vb);
	const struct v4l2_pix_format_mplane *format =
						&video->active_fmt.fmt.pix_mp;
	struct sg_table *sgt;
	unsigned int i;

	for (i = 0; i < format->num_planes; i++) {
		sgt = vb2_dma_sg_plane_desc(vb, i);
		if (!sgt)
			return -EFAULT;

		buffer->addr[i] = sg_dma_address(sgt->sgl);
	}

	if (format->pixelformat == V4L2_PIX_FMT_NV12 ||
			format->pixelformat == V4L2_PIX_FMT_NV21 ||
			format->pixelformat == V4L2_PIX_FMT_NV16 ||
			format->pixelformat == V4L2_PIX_FMT_NV61)
		buffer->addr[1] = buffer->addr[0] +
				format->plane_fmt[0].bytesperline *
				format->height;

	return 0;
}

static int video_buf_prepare(struct vb2_buffer *vb)
{
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue);
	const struct v4l2_pix_format_mplane *format =
						&video->active_fmt.fmt.pix_mp;
	unsigned int i;

	for (i = 0; i < format->num_planes; i++) {
		if (format->plane_fmt[i].sizeimage > vb2_plane_size(vb, i))
			return -EINVAL;

		vb2_set_plane_payload(vb, i, format->plane_fmt[i].sizeimage);
	}

	vbuf->field = V4L2_FIELD_NONE;

	return 0;
}

static void video_buf_queue(struct vb2_buffer *vb)
{
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue);
	struct camss_buffer *buffer = container_of(vbuf, struct camss_buffer,
						   vb);

	video->ops->queue_buffer(video, buffer);
}

static int video_check_format(struct camss_video *video)
{
	struct v4l2_pix_format_mplane *pix = &video->active_fmt.fmt.pix_mp;
	struct v4l2_format format;
	struct v4l2_pix_format_mplane *sd_pix = &format.fmt.pix_mp;
	int ret;

	sd_pix->pixelformat = pix->pixelformat;
	ret = video_get_subdev_format(video, &format);
	if (ret < 0)
		return ret;

	if (pix->pixelformat != sd_pix->pixelformat ||
	    pix->height != sd_pix->height ||
	    pix->width != sd_pix->width ||
	    pix->num_planes != sd_pix->num_planes ||
	    pix->field != format.fmt.pix_mp.field)
		return -EPIPE;

	return 0;
}

static int video_start_streaming(struct vb2_queue *q, unsigned int count)
{
	struct camss_video *video = vb2_get_drv_priv(q);
	struct video_device *vdev = &video->vdev;
	struct media_entity *entity;
	struct media_pad *pad;
	struct v4l2_subdev *subdev;
	int ret;

	ret = media_pipeline_start(&vdev->entity, &video->pipe);
	if (ret < 0)
		return ret;

	ret = video_check_format(video);
	if (ret < 0)
		goto error;

	entity = &vdev->entity;
	while (1) {
		pad = &entity->pads[0];
		if (!(pad->flags & MEDIA_PAD_FL_SINK))
			break;

		pad = media_entity_remote_pad(pad);
		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
			break;

		entity = pad->entity;
		subdev = media_entity_to_v4l2_subdev(entity);

		ret = v4l2_subdev_call(subdev, video, s_stream, 1);
		if (ret < 0 && ret != -ENOIOCTLCMD)
			goto error;
	}

	return 0;

error:
	media_pipeline_stop(&vdev->entity);

	video->ops->flush_buffers(video, VB2_BUF_STATE_QUEUED);

	return ret;
}

static void video_stop_streaming(struct vb2_queue *q)
{
	struct camss_video *video = vb2_get_drv_priv(q);
	struct video_device *vdev = &video->vdev;
	struct media_entity *entity;
	struct media_pad *pad;
	struct v4l2_subdev *subdev;

	entity = &vdev->entity;
	while (1) {
		pad = &entity->pads[0];
		if (!(pad->flags & MEDIA_PAD_FL_SINK))
			break;

		pad = media_entity_remote_pad(pad);
		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
			break;

		entity = pad->entity;
		subdev = media_entity_to_v4l2_subdev(entity);

		v4l2_subdev_call(subdev, video, s_stream, 0);
	}

	media_pipeline_stop(&vdev->entity);

	video->ops->flush_buffers(video, VB2_BUF_STATE_ERROR);
}

static const struct vb2_ops msm_video_vb2_q_ops = {
	.queue_setup     = video_queue_setup,
	.wait_prepare    = vb2_ops_wait_prepare,
	.wait_finish     = vb2_ops_wait_finish,
	.buf_init        = video_buf_init,
	.buf_prepare     = video_buf_prepare,
	.buf_queue       = video_buf_queue,
	.start_streaming = video_start_streaming,
	.stop_streaming  = video_stop_streaming,
};

/* -----------------------------------------------------------------------------
 * V4L2 ioctls
 */

static int video_querycap(struct file *file, void *fh,
			  struct v4l2_capability *cap)
{
	struct camss_video *video = video_drvdata(file);

	strscpy(cap->driver, "qcom-camss", sizeof(cap->driver));
	strscpy(cap->card, "Qualcomm Camera Subsystem", sizeof(cap->card));
	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
		 dev_name(video->camss->dev));

	return 0;
}

/*
 *  Returns the index in the video->formats[] array of the element which
 *  has the "ndx"th unique value of pixelformat field.
 *  If not found (no more unique pixelformat's) returns -EINVAL.
 */
static int video_get_unique_pixelformat_by_index(struct camss_video *video,
						 int ndx)
{
	int i, j, k;

	/* find index "i" of "k"th unique pixelformat in formats array */
	k = -1;
	for (i = 0; i < video->nformats; i++) {
		for (j = 0; j < i; j++) {
			if (video->formats[i].pixelformat ==
					video->formats[j].pixelformat)
				break;
		}

		if (j == i)
			k++;

		if (k == ndx)
			return i;
	}

	return -EINVAL;
}

/*
 *  Returns the index in the video->formats[] array of the element which
 *  has code equal to mcode.
 *  If not found returns -EINVAL.
 */
static int video_get_pixelformat_by_mbus_code(struct camss_video *video,
					      u32 mcode)
{
	int i;

	for (i = 0; i < video->nformats; i++) {
		if (video->formats[i].code == mcode)
			return i;
	}

	return -EINVAL;
}

static int video_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f)
{
	struct camss_video *video = video_drvdata(file);
	int i;

	if (f->type != video->type)
		return -EINVAL;

	if (f->index >= video->nformats)
		return -EINVAL;

	if (f->mbus_code) {
		/* Each entry in formats[] table has unique mbus_code */
		if (f->index > 0)
			return -EINVAL;

		i = video_get_pixelformat_by_mbus_code(video, f->mbus_code);
	} else {
		i = video_get_unique_pixelformat_by_index(video, f->index);
	}

	if (i < 0)
		return -EINVAL;

	f->pixelformat = video->formats[i].pixelformat;

	return 0;
}

static int video_enum_framesizes(struct file *file, void *fh,
				 struct v4l2_frmsizeenum *fsize)
{
	struct camss_video *video = video_drvdata(file);
	int i;

	if (fsize->index)
		return -EINVAL;

	/* Only accept pixel format present in the formats[] table */
	for (i = 0; i < video->nformats; i++) {
		if (video->formats[i].pixelformat == fsize->pixel_format)
			break;
	}

	if (i == video->nformats)
		return -EINVAL;

	fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS;
	fsize->stepwise.min_width = CAMSS_FRAME_MIN_WIDTH;
	fsize->stepwise.max_width = CAMSS_FRAME_MAX_WIDTH;
	fsize->stepwise.min_height = CAMSS_FRAME_MIN_HEIGHT;
	fsize->stepwise.max_height = (video->line_based) ?
		CAMSS_FRAME_MAX_HEIGHT_PIX : CAMSS_FRAME_MAX_HEIGHT_RDI;
	fsize->stepwise.step_width = 1;
	fsize->stepwise.step_height = 1;

	return 0;
}

static int video_g_fmt(struct file *file, void *fh, struct v4l2_format *f)
{
	struct camss_video *video = video_drvdata(file);

	*f = video->active_fmt;

	return 0;
}

static int __video_try_fmt(struct camss_video *video, struct v4l2_format *f)
{
	struct v4l2_pix_format_mplane *pix_mp;
	const struct camss_format_info *fi;
	struct v4l2_plane_pix_format *p;
	u32 bytesperline[3] = { 0 };
	u32 sizeimage[3] = { 0 };
	u32 width, height;
	u32 bpl, lines;
	int i, j;

	pix_mp = &f->fmt.pix_mp;

	if (video->line_based)
		for (i = 0; i < pix_mp->num_planes && i < 3; i++) {
			p = &pix_mp->plane_fmt[i];
			bytesperline[i] = clamp_t(u32, p->bytesperline,
						  1, 65528);
			sizeimage[i] = clamp_t(u32, p->sizeimage,
					       bytesperline[i],
					       bytesperline[i] * CAMSS_FRAME_MAX_HEIGHT_PIX);
		}

	for (j = 0; j < video->nformats; j++)
		if (pix_mp->pixelformat == video->formats[j].pixelformat)
			break;

	if (j == video->nformats)
		j = 0; /* default format */

	fi = &video->formats[j];
	width = pix_mp->width;
	height = pix_mp->height;

	memset(pix_mp, 0, sizeof(*pix_mp));

	pix_mp->pixelformat = fi->pixelformat;
	pix_mp->width = clamp_t(u32, width, 1, CAMSS_FRAME_MAX_WIDTH);
	pix_mp->height = clamp_t(u32, height, 1, CAMSS_FRAME_MAX_HEIGHT_RDI);
	pix_mp->num_planes = fi->planes;
	for (i = 0; i < pix_mp->num_planes; i++) {
		bpl = pix_mp->width / fi->hsub[i].numerator *
			fi->hsub[i].denominator * fi->bpp[i] / 8;
		bpl = ALIGN(bpl, video->bpl_alignment);
		pix_mp->plane_fmt[i].bytesperline = bpl;
		pix_mp->plane_fmt[i].sizeimage = pix_mp->height /
			fi->vsub[i].numerator * fi->vsub[i].denominator * bpl;
	}

	pix_mp->field = V4L2_FIELD_NONE;
	pix_mp->colorspace = V4L2_COLORSPACE_SRGB;
	pix_mp->flags = 0;
	pix_mp->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(pix_mp->colorspace);
	pix_mp->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
					pix_mp->colorspace, pix_mp->ycbcr_enc);
	pix_mp->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pix_mp->colorspace);

	if (video->line_based)
		for (i = 0; i < pix_mp->num_planes; i++) {
			p = &pix_mp->plane_fmt[i];
			p->bytesperline = clamp_t(u32, p->bytesperline,
						  1, 65528);
			p->sizeimage = clamp_t(u32, p->sizeimage,
					       p->bytesperline,
					       p->bytesperline * CAMSS_FRAME_MAX_HEIGHT_PIX);
			lines = p->sizeimage / p->bytesperline;

			if (p->bytesperline < bytesperline[i])
				p->bytesperline = ALIGN(bytesperline[i], 8);

			if (p->sizeimage < p->bytesperline * lines)
				p->sizeimage = p->bytesperline * lines;

			if (p->sizeimage < sizeimage[i])
				p->sizeimage = sizeimage[i];
		}

	return 0;
}

static int video_try_fmt(struct file *file, void *fh, struct v4l2_format *f)
{
	struct camss_video *video = video_drvdata(file);

	return __video_try_fmt(video, f);
}

static int video_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
{
	struct camss_video *video = video_drvdata(file);
	int ret;

	if (vb2_is_busy(&video->vb2_q))
		return -EBUSY;

	ret = __video_try_fmt(video, f);
	if (ret < 0)
		return ret;

	video->active_fmt = *f;

	return 0;
}

static int video_enum_input(struct file *file, void *fh,
			    struct v4l2_input *input)
{
	if (input->index > 0)
		return -EINVAL;

	strscpy(input->name, "camera", sizeof(input->name));
	input->type = V4L2_INPUT_TYPE_CAMERA;

	return 0;
}

static int video_g_input(struct file *file, void *fh, unsigned int *input)
{
	*input = 0;

	return 0;
}

static int video_s_input(struct file *file, void *fh, unsigned int input)
{
	return input == 0 ? 0 : -EINVAL;
}

static const struct v4l2_ioctl_ops msm_vid_ioctl_ops = {
	.vidioc_querycap		= video_querycap,
	.vidioc_enum_fmt_vid_cap	= video_enum_fmt,
	.vidioc_enum_framesizes		= video_enum_framesizes,
	.vidioc_g_fmt_vid_cap_mplane	= video_g_fmt,
	.vidioc_s_fmt_vid_cap_mplane	= video_s_fmt,
	.vidioc_try_fmt_vid_cap_mplane	= video_try_fmt,
	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
	.vidioc_querybuf		= vb2_ioctl_querybuf,
	.vidioc_qbuf			= vb2_ioctl_qbuf,
	.vidioc_expbuf			= vb2_ioctl_expbuf,
	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
	.vidioc_create_bufs		= vb2_ioctl_create_bufs,
	.vidioc_prepare_buf		= vb2_ioctl_prepare_buf,
	.vidioc_streamon		= vb2_ioctl_streamon,
	.vidioc_streamoff		= vb2_ioctl_streamoff,
	.vidioc_enum_input		= video_enum_input,
	.vidioc_g_input			= video_g_input,
	.vidioc_s_input			= video_s_input,
};

/* -----------------------------------------------------------------------------
 * V4L2 file operations
 */

static int video_open(struct file *file)
{
	struct video_device *vdev = video_devdata(file);
	struct camss_video *video = video_drvdata(file);
	struct v4l2_fh *vfh;
	int ret;

	mutex_lock(&video->lock);

	vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
	if (vfh == NULL) {
		ret = -ENOMEM;
		goto error_alloc;
	}

	v4l2_fh_init(vfh, vdev);
	v4l2_fh_add(vfh);

	file->private_data = vfh;

	ret = v4l2_pipeline_pm_get(&vdev->entity);
	if (ret < 0) {
		dev_err(video->camss->dev, "Failed to power up pipeline: %d\n",
			ret);
		goto error_pm_use;
	}

	mutex_unlock(&video->lock);

	return 0;

error_pm_use:
	v4l2_fh_release(file);

error_alloc:
	mutex_unlock(&video->lock);

	return ret;
}

static int video_release(struct file *file)
{
	struct video_device *vdev = video_devdata(file);

	vb2_fop_release(file);

	v4l2_pipeline_pm_put(&vdev->entity);

	file->private_data = NULL;

	return 0;
}

static const struct v4l2_file_operations msm_vid_fops = {
	.owner          = THIS_MODULE,
	.unlocked_ioctl = video_ioctl2,
	.open           = video_open,
	.release        = video_release,
	.poll           = vb2_fop_poll,
	.mmap		= vb2_fop_mmap,
	.read		= vb2_fop_read,
};

/* -----------------------------------------------------------------------------
 * CAMSS video core
 */

static void msm_video_release(struct video_device *vdev)
{
	struct camss_video *video = video_get_drvdata(vdev);

	media_entity_cleanup(&vdev->entity);

	mutex_destroy(&video->q_lock);
	mutex_destroy(&video->lock);

	if (atomic_dec_and_test(&video->camss->ref_count))
		camss_delete(video->camss);
}

/*
 * msm_video_init_format - Helper function to initialize format
 * @video: struct camss_video
 *
 * Initialize pad format with default value.
 *
 * Return 0 on success or a negative error code otherwise
 */
static int msm_video_init_format(struct camss_video *video)
{
	int ret;
	struct v4l2_format format = {
		.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
		.fmt.pix_mp = {
			.width = 1920,
			.height = 1080,
			.pixelformat = video->formats[0].pixelformat,
		},
	};

	ret = __video_try_fmt(video, &format);
	if (ret < 0)
		return ret;

	video->active_fmt = format;

	return 0;
}

/*
 * msm_video_register - Register a video device node
 * @video: struct camss_video
 * @v4l2_dev: V4L2 device
 * @name: name to be used for the video device node
 *
 * Initialize and register a video device node to a V4L2 device. Also
 * initialize the vb2 queue.
 *
 * Return 0 on success or a negative error code otherwise
 */

int msm_video_register(struct camss_video *video, struct v4l2_device *v4l2_dev,
		       const char *name, int is_pix)
{
	struct media_pad *pad = &video->pad;
	struct video_device *vdev;
	struct vb2_queue *q;
	int ret;

	vdev = &video->vdev;

	mutex_init(&video->q_lock);

	q = &video->vb2_q;
	q->drv_priv = video;
	q->mem_ops = &vb2_dma_sg_memops;
	q->ops = &msm_video_vb2_q_ops;
	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
	q->io_modes = VB2_DMABUF | VB2_MMAP | VB2_READ;
	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
	q->buf_struct_size = sizeof(struct camss_buffer);
	q->dev = video->camss->dev;
	q->lock = &video->q_lock;
	ret = vb2_queue_init(q);
	if (ret < 0) {
		dev_err(v4l2_dev->dev, "Failed to init vb2 queue: %d\n", ret);
		goto error_vb2_init;
	}

	pad->flags = MEDIA_PAD_FL_SINK;
	ret = media_entity_pads_init(&vdev->entity, 1, pad);
	if (ret < 0) {
		dev_err(v4l2_dev->dev, "Failed to init video entity: %d\n",
			ret);
		goto error_vb2_init;
	}

	mutex_init(&video->lock);

	if (video->camss->version == CAMSS_8x16) {
		if (is_pix) {
			video->formats = formats_pix_8x16;
			video->nformats = ARRAY_SIZE(formats_pix_8x16);
		} else {
			video->formats = formats_rdi_8x16;
			video->nformats = ARRAY_SIZE(formats_rdi_8x16);
		}
	} else if (video->camss->version == CAMSS_8x96) {
		if (is_pix) {
			video->formats = formats_pix_8x96;
			video->nformats = ARRAY_SIZE(formats_pix_8x96);
		} else {
			video->formats = formats_rdi_8x96;
			video->nformats = ARRAY_SIZE(formats_rdi_8x96);
		}
	} else {
		goto error_video_register;
	}

	ret = msm_video_init_format(video);
	if (ret < 0) {
		dev_err(v4l2_dev->dev, "Failed to init format: %d\n", ret);
		goto error_video_register;
	}

	vdev->fops = &msm_vid_fops;
	vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING
			  | V4L2_CAP_READWRITE | V4L2_CAP_IO_MC;
	vdev->ioctl_ops = &msm_vid_ioctl_ops;
	vdev->release = msm_video_release;
	vdev->v4l2_dev = v4l2_dev;
	vdev->vfl_dir = VFL_DIR_RX;
	vdev->queue = &video->vb2_q;
	vdev->lock = &video->lock;
	strscpy(vdev->name, name, sizeof(vdev->name));

	ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
	if (ret < 0) {
		dev_err(v4l2_dev->dev, "Failed to register video device: %d\n",
			ret);
		goto error_video_register;
	}

	video_set_drvdata(vdev, video);
	atomic_inc(&video->camss->ref_count);

	return 0;

error_video_register:
	media_entity_cleanup(&vdev->entity);
	mutex_destroy(&video->lock);
error_vb2_init:
	mutex_destroy(&video->q_lock);

	return ret;
}

void msm_video_unregister(struct camss_video *video)
{
	atomic_inc(&video->camss->ref_count);
	vb2_video_unregister_device(&video->vdev);
	atomic_dec(&video->camss->ref_count);
}