summaryrefslogtreecommitdiff
path: root/drivers/media/platform/sh_veu.c
blob: 82b5d69b87fa6a0a9fc46080854d9b2dc0688894 (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
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
/*
 * sh-mobile VEU mem2mem driver
 *
 * Copyright (C) 2012 Renesas Electronics Corporation
 * Author: Guennadi Liakhovetski, <g.liakhovetski@gmx.de>
 * Copyright (C) 2008 Magnus Damm
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the version 2 of the GNU General Public License as
 * published by the Free Software Foundation
 */

#include <linux/err.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/videodev2.h>

#include <media/v4l2-dev.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-mem2mem.h>
#include <media/v4l2-image-sizes.h>
#include <media/videobuf2-dma-contig.h>

#define VEU_STR 0x00 /* start register */
#define VEU_SWR 0x10 /* src: line length */
#define VEU_SSR 0x14 /* src: image size */
#define VEU_SAYR 0x18 /* src: y/rgb plane address */
#define VEU_SACR 0x1c /* src: c plane address */
#define VEU_BSSR 0x20 /* bundle mode register */
#define VEU_EDWR 0x30 /* dst: line length */
#define VEU_DAYR 0x34 /* dst: y/rgb plane address */
#define VEU_DACR 0x38 /* dst: c plane address */
#define VEU_TRCR 0x50 /* transform control */
#define VEU_RFCR 0x54 /* resize scale */
#define VEU_RFSR 0x58 /* resize clip */
#define VEU_ENHR 0x5c /* enhance */
#define VEU_FMCR 0x70 /* filter mode */
#define VEU_VTCR 0x74 /* lowpass vertical */
#define VEU_HTCR 0x78 /* lowpass horizontal */
#define VEU_APCR 0x80 /* color match */
#define VEU_ECCR 0x84 /* color replace */
#define VEU_AFXR 0x90 /* fixed mode */
#define VEU_SWPR 0x94 /* swap */
#define VEU_EIER 0xa0 /* interrupt mask */
#define VEU_EVTR 0xa4 /* interrupt event */
#define VEU_STAR 0xb0 /* status */
#define VEU_BSRR 0xb4 /* reset */

#define VEU_MCR00 0x200 /* color conversion matrix coefficient 00 */
#define VEU_MCR01 0x204 /* color conversion matrix coefficient 01 */
#define VEU_MCR02 0x208 /* color conversion matrix coefficient 02 */
#define VEU_MCR10 0x20c /* color conversion matrix coefficient 10 */
#define VEU_MCR11 0x210 /* color conversion matrix coefficient 11 */
#define VEU_MCR12 0x214 /* color conversion matrix coefficient 12 */
#define VEU_MCR20 0x218 /* color conversion matrix coefficient 20 */
#define VEU_MCR21 0x21c /* color conversion matrix coefficient 21 */
#define VEU_MCR22 0x220 /* color conversion matrix coefficient 22 */
#define VEU_COFFR 0x224 /* color conversion offset */
#define VEU_CBR   0x228 /* color conversion clip */

/*
 * 4092x4092 max size is the normal case. In some cases it can be reduced to
 * 2048x2048, in other cases it can be 4092x8188 or even 8188x8188.
 */
#define MAX_W 4092
#define MAX_H 4092
#define MIN_W 8
#define MIN_H 8
#define ALIGN_W 4

/* 3 buffers of 2048 x 1536 - 3 megapixels @ 16bpp */
#define VIDEO_MEM_LIMIT ALIGN(2048 * 1536 * 2 * 3, 1024 * 1024)

#define MEM2MEM_DEF_TRANSLEN 1

struct sh_veu_dev;

struct sh_veu_file {
	struct sh_veu_dev *veu_dev;
	bool cfg_needed;
};

struct sh_veu_format {
	char *name;
	u32 fourcc;
	unsigned int depth;
	unsigned int ydepth;
};

/* video data format */
struct sh_veu_vfmt {
	/* Replace with v4l2_rect */
	struct v4l2_rect		frame;
	unsigned int			bytesperline;
	unsigned int			offset_y;
	unsigned int			offset_c;
	const struct sh_veu_format	*fmt;
};

struct sh_veu_dev {
	struct v4l2_device v4l2_dev;
	struct video_device vdev;
	struct v4l2_m2m_dev *m2m_dev;
	struct device *dev;
	struct v4l2_m2m_ctx *m2m_ctx;
	struct sh_veu_vfmt vfmt_out;
	struct sh_veu_vfmt vfmt_in;
	/* Only single user per direction so far */
	struct sh_veu_file *capture;
	struct sh_veu_file *output;
	struct mutex fop_lock;
	void __iomem *base;
	struct vb2_alloc_ctx *alloc_ctx;
	spinlock_t lock;
	bool is_2h;
	unsigned int xaction;
	bool aborting;
};

enum sh_veu_fmt_idx {
	SH_VEU_FMT_NV12,
	SH_VEU_FMT_NV16,
	SH_VEU_FMT_NV24,
	SH_VEU_FMT_RGB332,
	SH_VEU_FMT_RGB444,
	SH_VEU_FMT_RGB565,
	SH_VEU_FMT_RGB666,
	SH_VEU_FMT_RGB24,
};

#define DEFAULT_IN_WIDTH	VGA_WIDTH
#define DEFAULT_IN_HEIGHT	VGA_HEIGHT
#define DEFAULT_IN_FMTIDX	SH_VEU_FMT_NV12
#define DEFAULT_OUT_WIDTH	VGA_WIDTH
#define DEFAULT_OUT_HEIGHT	VGA_HEIGHT
#define DEFAULT_OUT_FMTIDX	SH_VEU_FMT_RGB565

/*
 * Alignment: Y-plane should be 4-byte aligned for NV12 and NV16, and 8-byte
 * aligned for NV24.
 */
static const struct sh_veu_format sh_veu_fmt[] = {
	[SH_VEU_FMT_NV12]   = { .ydepth = 8, .depth = 12, .name = "NV12", .fourcc = V4L2_PIX_FMT_NV12 },
	[SH_VEU_FMT_NV16]   = { .ydepth = 8, .depth = 16, .name = "NV16", .fourcc = V4L2_PIX_FMT_NV16 },
	[SH_VEU_FMT_NV24]   = { .ydepth = 8, .depth = 24, .name = "NV24", .fourcc = V4L2_PIX_FMT_NV24 },
	[SH_VEU_FMT_RGB332] = { .ydepth = 8, .depth = 8, .name = "RGB332", .fourcc = V4L2_PIX_FMT_RGB332 },
	[SH_VEU_FMT_RGB444] = { .ydepth = 16, .depth = 16, .name = "RGB444", .fourcc = V4L2_PIX_FMT_RGB444 },
	[SH_VEU_FMT_RGB565] = { .ydepth = 16, .depth = 16, .name = "RGB565", .fourcc = V4L2_PIX_FMT_RGB565 },
	[SH_VEU_FMT_RGB666] = { .ydepth = 32, .depth = 32, .name = "BGR666", .fourcc = V4L2_PIX_FMT_BGR666 },
	[SH_VEU_FMT_RGB24]  = { .ydepth = 24, .depth = 24, .name = "RGB24", .fourcc = V4L2_PIX_FMT_RGB24 },
};

#define DEFAULT_IN_VFMT (struct sh_veu_vfmt){						\
	.frame = {									\
		.width = VGA_WIDTH,							\
		.height = VGA_HEIGHT,							\
	},										\
	.bytesperline = (VGA_WIDTH * sh_veu_fmt[DEFAULT_IN_FMTIDX].ydepth) >> 3,	\
	.fmt = &sh_veu_fmt[DEFAULT_IN_FMTIDX],						\
}

#define DEFAULT_OUT_VFMT (struct sh_veu_vfmt){						\
	.frame = {									\
		.width = VGA_WIDTH,							\
		.height = VGA_HEIGHT,							\
	},										\
	.bytesperline = (VGA_WIDTH * sh_veu_fmt[DEFAULT_OUT_FMTIDX].ydepth) >> 3,	\
	.fmt = &sh_veu_fmt[DEFAULT_OUT_FMTIDX],						\
}

/*
 * TODO: add support for further output formats:
 *	SH_VEU_FMT_NV12,
 *	SH_VEU_FMT_NV16,
 *	SH_VEU_FMT_NV24,
 *	SH_VEU_FMT_RGB332,
 *	SH_VEU_FMT_RGB444,
 *	SH_VEU_FMT_RGB666,
 *	SH_VEU_FMT_RGB24,
 */

static const int sh_veu_fmt_out[] = {
	SH_VEU_FMT_RGB565,
};

/*
 * TODO: add support for further input formats:
 *	SH_VEU_FMT_NV16,
 *	SH_VEU_FMT_NV24,
 *	SH_VEU_FMT_RGB565,
 *	SH_VEU_FMT_RGB666,
 *	SH_VEU_FMT_RGB24,
 */
static const int sh_veu_fmt_in[] = {
	SH_VEU_FMT_NV12,
};

static enum v4l2_colorspace sh_veu_4cc2cspace(u32 fourcc)
{
	switch (fourcc) {
	default:
		BUG();
	case V4L2_PIX_FMT_NV12:
	case V4L2_PIX_FMT_NV16:
	case V4L2_PIX_FMT_NV24:
		return V4L2_COLORSPACE_SMPTE170M;
	case V4L2_PIX_FMT_RGB332:
	case V4L2_PIX_FMT_RGB444:
	case V4L2_PIX_FMT_RGB565:
	case V4L2_PIX_FMT_BGR666:
	case V4L2_PIX_FMT_RGB24:
		return V4L2_COLORSPACE_SRGB;
	}
}

static u32 sh_veu_reg_read(struct sh_veu_dev *veu, unsigned int reg)
{
	return ioread32(veu->base + reg);
}

static void sh_veu_reg_write(struct sh_veu_dev *veu, unsigned int reg,
			     u32 value)
{
	iowrite32(value, veu->base + reg);
}

		/* ========== mem2mem callbacks ========== */

static void sh_veu_job_abort(void *priv)
{
	struct sh_veu_dev *veu = priv;

	/* Will cancel the transaction in the next interrupt handler */
	veu->aborting = true;
}

static void sh_veu_process(struct sh_veu_dev *veu,
			   struct vb2_buffer *src_buf,
			   struct vb2_buffer *dst_buf)
{
	dma_addr_t addr = vb2_dma_contig_plane_dma_addr(dst_buf, 0);

	sh_veu_reg_write(veu, VEU_DAYR, addr + veu->vfmt_out.offset_y);
	sh_veu_reg_write(veu, VEU_DACR, veu->vfmt_out.offset_c ?
			 addr + veu->vfmt_out.offset_c : 0);
	dev_dbg(veu->dev, "%s(): dst base %lx, y: %x, c: %x\n", __func__,
		(unsigned long)addr,
		veu->vfmt_out.offset_y, veu->vfmt_out.offset_c);

	addr = vb2_dma_contig_plane_dma_addr(src_buf, 0);
	sh_veu_reg_write(veu, VEU_SAYR, addr + veu->vfmt_in.offset_y);
	sh_veu_reg_write(veu, VEU_SACR, veu->vfmt_in.offset_c ?
			 addr + veu->vfmt_in.offset_c : 0);
	dev_dbg(veu->dev, "%s(): src base %lx, y: %x, c: %x\n", __func__,
		(unsigned long)addr,
		veu->vfmt_in.offset_y, veu->vfmt_in.offset_c);

	sh_veu_reg_write(veu, VEU_STR, 1);

	sh_veu_reg_write(veu, VEU_EIER, 1); /* enable interrupt in VEU */
}

/**
 * sh_veu_device_run() - prepares and starts the device
 *
 * This will be called by the framework when it decides to schedule a particular
 * instance.
 */
static void sh_veu_device_run(void *priv)
{
	struct sh_veu_dev *veu = priv;
	struct vb2_buffer *src_buf, *dst_buf;

	src_buf = v4l2_m2m_next_src_buf(veu->m2m_ctx);
	dst_buf = v4l2_m2m_next_dst_buf(veu->m2m_ctx);

	if (src_buf && dst_buf)
		sh_veu_process(veu, src_buf, dst_buf);
}

		/* ========== video ioctls ========== */

static bool sh_veu_is_streamer(struct sh_veu_dev *veu, struct sh_veu_file *veu_file,
			       enum v4l2_buf_type type)
{
	return (type == V4L2_BUF_TYPE_VIDEO_CAPTURE &&
		veu_file == veu->capture) ||
		(type == V4L2_BUF_TYPE_VIDEO_OUTPUT &&
		 veu_file == veu->output);
}

static int sh_veu_queue_init(void *priv, struct vb2_queue *src_vq,
			     struct vb2_queue *dst_vq);

/*
 * It is not unusual to have video nodes open()ed multiple times. While some
 * V4L2 operations are non-intrusive, like querying formats and various
 * parameters, others, like setting formats, starting and stopping streaming,
 * queuing and dequeuing buffers, directly affect hardware configuration and /
 * or execution. This function verifies availability of the requested interface
 * and, if available, reserves it for the requesting user.
 */
static int sh_veu_stream_init(struct sh_veu_dev *veu, struct sh_veu_file *veu_file,
			      enum v4l2_buf_type type)
{
	struct sh_veu_file **stream;

	switch (type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		stream = &veu->capture;
		break;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
		stream = &veu->output;
		break;
	default:
		return -EINVAL;
	}

	if (*stream == veu_file)
		return 0;

	if (*stream)
		return -EBUSY;

	*stream = veu_file;

	return 0;
}

static int sh_veu_context_init(struct sh_veu_dev *veu)
{
	if (veu->m2m_ctx)
		return 0;

	veu->m2m_ctx = v4l2_m2m_ctx_init(veu->m2m_dev, veu,
					 sh_veu_queue_init);

	return PTR_ERR_OR_ZERO(veu->m2m_ctx);
}

static int sh_veu_querycap(struct file *file, void *priv,
			   struct v4l2_capability *cap)
{
	strlcpy(cap->driver, "sh-veu", sizeof(cap->driver));
	strlcpy(cap->card, "sh-mobile VEU", sizeof(cap->card));
	strlcpy(cap->bus_info, "platform:sh-veu", sizeof(cap->bus_info));
	cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;

	return 0;
}

static int sh_veu_enum_fmt(struct v4l2_fmtdesc *f, const int *fmt, int fmt_num)
{
	if (f->index >= fmt_num)
		return -EINVAL;

	strlcpy(f->description, sh_veu_fmt[fmt[f->index]].name, sizeof(f->description));
	f->pixelformat = sh_veu_fmt[fmt[f->index]].fourcc;
	return 0;
}

static int sh_veu_enum_fmt_vid_cap(struct file *file, void *priv,
				   struct v4l2_fmtdesc *f)
{
	return sh_veu_enum_fmt(f, sh_veu_fmt_out, ARRAY_SIZE(sh_veu_fmt_out));
}

static int sh_veu_enum_fmt_vid_out(struct file *file, void *priv,
				   struct v4l2_fmtdesc *f)
{
	return sh_veu_enum_fmt(f, sh_veu_fmt_in, ARRAY_SIZE(sh_veu_fmt_in));
}

static struct sh_veu_vfmt *sh_veu_get_vfmt(struct sh_veu_dev *veu,
					   enum v4l2_buf_type type)
{
	switch (type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		return &veu->vfmt_out;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
		return &veu->vfmt_in;
	default:
		return NULL;
	}
}

static int sh_veu_g_fmt(struct sh_veu_file *veu_file, struct v4l2_format *f)
{
	struct v4l2_pix_format *pix = &f->fmt.pix;
	struct sh_veu_dev *veu = veu_file->veu_dev;
	struct sh_veu_vfmt *vfmt;

	vfmt = sh_veu_get_vfmt(veu, f->type);

	pix->width		= vfmt->frame.width;
	pix->height		= vfmt->frame.height;
	pix->field		= V4L2_FIELD_NONE;
	pix->pixelformat	= vfmt->fmt->fourcc;
	pix->colorspace		= sh_veu_4cc2cspace(pix->pixelformat);
	pix->bytesperline	= vfmt->bytesperline;
	pix->sizeimage		= vfmt->bytesperline * pix->height *
		vfmt->fmt->depth / vfmt->fmt->ydepth;
	dev_dbg(veu->dev, "%s(): type: %d, size %u @ %ux%u, fmt %x\n", __func__,
		f->type, pix->sizeimage, pix->width, pix->height, pix->pixelformat);

	return 0;
}

static int sh_veu_g_fmt_vid_out(struct file *file, void *priv,
				struct v4l2_format *f)
{
	return sh_veu_g_fmt(priv, f);
}

static int sh_veu_g_fmt_vid_cap(struct file *file, void *priv,
				struct v4l2_format *f)
{
	return sh_veu_g_fmt(priv, f);
}

static int sh_veu_try_fmt(struct v4l2_format *f, const struct sh_veu_format *fmt)
{
	struct v4l2_pix_format *pix = &f->fmt.pix;
	unsigned int y_bytes_used;

	/*
	 * V4L2 specification suggests, that the driver should correct the
	 * format struct if any of the dimensions is unsupported
	 */
	switch (pix->field) {
	default:
	case V4L2_FIELD_ANY:
		pix->field = V4L2_FIELD_NONE;
		/* fall through: continue handling V4L2_FIELD_NONE */
	case V4L2_FIELD_NONE:
		break;
	}

	v4l_bound_align_image(&pix->width, MIN_W, MAX_W, ALIGN_W,
			      &pix->height, MIN_H, MAX_H, 0, 0);

	y_bytes_used = (pix->width * fmt->ydepth) >> 3;

	if (pix->bytesperline < y_bytes_used)
		pix->bytesperline = y_bytes_used;
	pix->sizeimage = pix->height * pix->bytesperline * fmt->depth / fmt->ydepth;

	pix->pixelformat	= fmt->fourcc;
	pix->colorspace		= sh_veu_4cc2cspace(pix->pixelformat);

	pr_debug("%s(): type: %d, size %u\n", __func__, f->type, pix->sizeimage);

	return 0;
}

static const struct sh_veu_format *sh_veu_find_fmt(const struct v4l2_format *f)
{
	const int *fmt;
	int i, n, dflt;

	pr_debug("%s(%d;%d)\n", __func__, f->type, f->fmt.pix.field);

	switch (f->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		fmt = sh_veu_fmt_out;
		n = ARRAY_SIZE(sh_veu_fmt_out);
		dflt = DEFAULT_OUT_FMTIDX;
		break;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
	default:
		fmt = sh_veu_fmt_in;
		n = ARRAY_SIZE(sh_veu_fmt_in);
		dflt = DEFAULT_IN_FMTIDX;
		break;
	}

	for (i = 0; i < n; i++)
		if (sh_veu_fmt[fmt[i]].fourcc == f->fmt.pix.pixelformat)
			return &sh_veu_fmt[fmt[i]];

	return &sh_veu_fmt[dflt];
}

static int sh_veu_try_fmt_vid_cap(struct file *file, void *priv,
				  struct v4l2_format *f)
{
	const struct sh_veu_format *fmt;

	fmt = sh_veu_find_fmt(f);
	if (!fmt)
		/* wrong buffer type */
		return -EINVAL;

	return sh_veu_try_fmt(f, fmt);
}

static int sh_veu_try_fmt_vid_out(struct file *file, void *priv,
				  struct v4l2_format *f)
{
	const struct sh_veu_format *fmt;

	fmt = sh_veu_find_fmt(f);
	if (!fmt)
		/* wrong buffer type */
		return -EINVAL;

	return sh_veu_try_fmt(f, fmt);
}

static void sh_veu_colour_offset(struct sh_veu_dev *veu, struct sh_veu_vfmt *vfmt)
{
	/* dst_left and dst_top validity will be verified in CROP / COMPOSE */
	unsigned int left = vfmt->frame.left & ~0x03;
	unsigned int top = vfmt->frame.top;
	dma_addr_t offset = ((left * veu->vfmt_out.fmt->depth) >> 3) +
		top * veu->vfmt_out.bytesperline;
	unsigned int y_line;

	vfmt->offset_y = offset;

	switch (vfmt->fmt->fourcc) {
	case V4L2_PIX_FMT_NV12:
	case V4L2_PIX_FMT_NV16:
	case V4L2_PIX_FMT_NV24:
		y_line = ALIGN(vfmt->frame.width, 16);
		vfmt->offset_c = offset + y_line * vfmt->frame.height;
		break;
	case V4L2_PIX_FMT_RGB332:
	case V4L2_PIX_FMT_RGB444:
	case V4L2_PIX_FMT_RGB565:
	case V4L2_PIX_FMT_BGR666:
	case V4L2_PIX_FMT_RGB24:
		vfmt->offset_c = 0;
		break;
	default:
		BUG();
	}
}

static int sh_veu_s_fmt(struct sh_veu_file *veu_file, struct v4l2_format *f)
{
	struct v4l2_pix_format *pix = &f->fmt.pix;
	struct sh_veu_dev *veu = veu_file->veu_dev;
	struct sh_veu_vfmt *vfmt;
	struct vb2_queue *vq;
	int ret = sh_veu_context_init(veu);
	if (ret < 0)
		return ret;

	vq = v4l2_m2m_get_vq(veu->m2m_ctx, f->type);
	if (!vq)
		return -EINVAL;

	if (vb2_is_busy(vq)) {
		v4l2_err(&veu_file->veu_dev->v4l2_dev, "%s queue busy\n", __func__);
		return -EBUSY;
	}

	vfmt = sh_veu_get_vfmt(veu, f->type);
	/* called after try_fmt(), hence vfmt != NULL. Implicit BUG_ON() below */

	vfmt->fmt		= sh_veu_find_fmt(f);
	/* vfmt->fmt != NULL following the same argument as above */
	vfmt->frame.width	= pix->width;
	vfmt->frame.height	= pix->height;
	vfmt->bytesperline	= pix->bytesperline;

	sh_veu_colour_offset(veu, vfmt);

	/*
	 * We could also verify and require configuration only if any parameters
	 * actually have changed, but it is unlikely, that the user requests the
	 * same configuration several times without closing the device.
	 */
	veu_file->cfg_needed = true;

	dev_dbg(veu->dev,
		"Setting format for type %d, wxh: %dx%d, fmt: %x\n",
		f->type, pix->width, pix->height, vfmt->fmt->fourcc);

	return 0;
}

static int sh_veu_s_fmt_vid_cap(struct file *file, void *priv,
				struct v4l2_format *f)
{
	int ret = sh_veu_try_fmt_vid_cap(file, priv, f);
	if (ret)
		return ret;

	return sh_veu_s_fmt(priv, f);
}

static int sh_veu_s_fmt_vid_out(struct file *file, void *priv,
				struct v4l2_format *f)
{
	int ret = sh_veu_try_fmt_vid_out(file, priv, f);
	if (ret)
		return ret;

	return sh_veu_s_fmt(priv, f);
}

static int sh_veu_reqbufs(struct file *file, void *priv,
			  struct v4l2_requestbuffers *reqbufs)
{
	struct sh_veu_file *veu_file = priv;
	struct sh_veu_dev *veu = veu_file->veu_dev;
	int ret = sh_veu_context_init(veu);
	if (ret < 0)
		return ret;

	ret = sh_veu_stream_init(veu, veu_file, reqbufs->type);
	if (ret < 0)
		return ret;

	return v4l2_m2m_reqbufs(file, veu->m2m_ctx, reqbufs);
}

static int sh_veu_querybuf(struct file *file, void *priv,
			   struct v4l2_buffer *buf)
{
	struct sh_veu_file *veu_file = priv;

	if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, buf->type))
		return -EBUSY;

	return v4l2_m2m_querybuf(file, veu_file->veu_dev->m2m_ctx, buf);
}

static int sh_veu_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
{
	struct sh_veu_file *veu_file = priv;

	dev_dbg(veu_file->veu_dev->dev, "%s(%d)\n", __func__, buf->type);
	if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, buf->type))
		return -EBUSY;

	return v4l2_m2m_qbuf(file, veu_file->veu_dev->m2m_ctx, buf);
}

static int sh_veu_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
{
	struct sh_veu_file *veu_file = priv;

	dev_dbg(veu_file->veu_dev->dev, "%s(%d)\n", __func__, buf->type);
	if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, buf->type))
		return -EBUSY;

	return v4l2_m2m_dqbuf(file, veu_file->veu_dev->m2m_ctx, buf);
}

static void sh_veu_calc_scale(struct sh_veu_dev *veu,
			      int size_in, int size_out, int crop_out,
			      u32 *mant, u32 *frac, u32 *rep)
{
	u32 fixpoint;

	/* calculate FRAC and MANT */
	*rep = *mant = *frac = 0;

	if (size_in == size_out) {
		if (crop_out != size_out)
			*mant = 1; /* needed for cropping */
		return;
	}

	/* VEU2H special upscale */
	if (veu->is_2h && size_out > size_in) {
		u32 fixpoint = (4096 * size_in) / size_out;
		*mant = fixpoint / 4096;
		*frac = (fixpoint - (*mant * 4096)) & ~0x07;

		switch (*frac) {
		case 0x800:
			*rep = 1;
			break;
		case 0x400:
			*rep = 3;
			break;
		case 0x200:
			*rep = 7;
			break;
		}
		if (*rep)
			return;
	}

	fixpoint = (4096 * (size_in - 1)) / (size_out + 1);
	*mant = fixpoint / 4096;
	*frac = fixpoint - (*mant * 4096);

	if (*frac & 0x07) {
		/*
		 * FIXME: do we really have to round down twice in the
		 * up-scaling case?
		 */
		*frac &= ~0x07;
		if (size_out > size_in)
			*frac -= 8; /* round down if scaling up */
		else
			*frac += 8; /* round up if scaling down */
	}
}

static unsigned long sh_veu_scale_v(struct sh_veu_dev *veu,
				    int size_in, int size_out, int crop_out)
{
	u32 mant, frac, value, rep;

	sh_veu_calc_scale(veu, size_in, size_out, crop_out, &mant, &frac, &rep);

	/* set scale */
	value = (sh_veu_reg_read(veu, VEU_RFCR) & ~0xffff0000) |
		(((mant << 12) | frac) << 16);

	sh_veu_reg_write(veu, VEU_RFCR, value);

	/* set clip */
	value = (sh_veu_reg_read(veu, VEU_RFSR) & ~0xffff0000) |
		(((rep << 12) | crop_out) << 16);

	sh_veu_reg_write(veu, VEU_RFSR, value);

	return ALIGN((size_in * crop_out) / size_out, 4);
}

static unsigned long sh_veu_scale_h(struct sh_veu_dev *veu,
				    int size_in, int size_out, int crop_out)
{
	u32 mant, frac, value, rep;

	sh_veu_calc_scale(veu, size_in, size_out, crop_out, &mant, &frac, &rep);

	/* set scale */
	value = (sh_veu_reg_read(veu, VEU_RFCR) & ~0xffff) |
		(mant << 12) | frac;

	sh_veu_reg_write(veu, VEU_RFCR, value);

	/* set clip */
	value = (sh_veu_reg_read(veu, VEU_RFSR) & ~0xffff) |
		(rep << 12) | crop_out;

	sh_veu_reg_write(veu, VEU_RFSR, value);

	return ALIGN((size_in * crop_out) / size_out, 4);
}

static void sh_veu_configure(struct sh_veu_dev *veu)
{
	u32 src_width, src_stride, src_height;
	u32 dst_width, dst_stride, dst_height;
	u32 real_w, real_h;

	/* reset VEU */
	sh_veu_reg_write(veu, VEU_BSRR, 0x100);

	src_width = veu->vfmt_in.frame.width;
	src_height = veu->vfmt_in.frame.height;
	src_stride = ALIGN(veu->vfmt_in.frame.width, 16);

	dst_width = real_w = veu->vfmt_out.frame.width;
	dst_height = real_h = veu->vfmt_out.frame.height;
	/* Datasheet is unclear - whether it's always number of bytes or not */
	dst_stride = veu->vfmt_out.bytesperline;

	/*
	 * So far real_w == dst_width && real_h == dst_height, but it wasn't
	 * necessarily the case in the original vidix driver, so, it may change
	 * here in the future too.
	 */
	src_width = sh_veu_scale_h(veu, src_width, real_w, dst_width);
	src_height = sh_veu_scale_v(veu, src_height, real_h, dst_height);

	sh_veu_reg_write(veu, VEU_SWR, src_stride);
	sh_veu_reg_write(veu, VEU_SSR, src_width | (src_height << 16));
	sh_veu_reg_write(veu, VEU_BSSR, 0); /* not using bundle mode */

	sh_veu_reg_write(veu, VEU_EDWR, dst_stride);
	sh_veu_reg_write(veu, VEU_DACR, 0); /* unused for RGB */

	sh_veu_reg_write(veu, VEU_SWPR, 0x67);
	sh_veu_reg_write(veu, VEU_TRCR, (6 << 16) | (0 << 14) | 2 | 4);

	if (veu->is_2h) {
		sh_veu_reg_write(veu, VEU_MCR00, 0x0cc5);
		sh_veu_reg_write(veu, VEU_MCR01, 0x0950);
		sh_veu_reg_write(veu, VEU_MCR02, 0x0000);

		sh_veu_reg_write(veu, VEU_MCR10, 0x397f);
		sh_veu_reg_write(veu, VEU_MCR11, 0x0950);
		sh_veu_reg_write(veu, VEU_MCR12, 0x3ccd);

		sh_veu_reg_write(veu, VEU_MCR20, 0x0000);
		sh_veu_reg_write(veu, VEU_MCR21, 0x0950);
		sh_veu_reg_write(veu, VEU_MCR22, 0x1023);

		sh_veu_reg_write(veu, VEU_COFFR, 0x00800010);
	}
}

static int sh_veu_streamon(struct file *file, void *priv,
			   enum v4l2_buf_type type)
{
	struct sh_veu_file *veu_file = priv;

	if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, type))
		return -EBUSY;

	if (veu_file->cfg_needed) {
		struct sh_veu_dev *veu = veu_file->veu_dev;
		veu_file->cfg_needed = false;
		sh_veu_configure(veu_file->veu_dev);
		veu->xaction = 0;
		veu->aborting = false;
	}

	return v4l2_m2m_streamon(file, veu_file->veu_dev->m2m_ctx, type);
}

static int sh_veu_streamoff(struct file *file, void *priv,
			    enum v4l2_buf_type type)
{
	struct sh_veu_file *veu_file = priv;

	if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, type))
		return -EBUSY;

	return v4l2_m2m_streamoff(file, veu_file->veu_dev->m2m_ctx, type);
}

static const struct v4l2_ioctl_ops sh_veu_ioctl_ops = {
	.vidioc_querycap	= sh_veu_querycap,

	.vidioc_enum_fmt_vid_cap = sh_veu_enum_fmt_vid_cap,
	.vidioc_g_fmt_vid_cap	= sh_veu_g_fmt_vid_cap,
	.vidioc_try_fmt_vid_cap	= sh_veu_try_fmt_vid_cap,
	.vidioc_s_fmt_vid_cap	= sh_veu_s_fmt_vid_cap,

	.vidioc_enum_fmt_vid_out = sh_veu_enum_fmt_vid_out,
	.vidioc_g_fmt_vid_out	= sh_veu_g_fmt_vid_out,
	.vidioc_try_fmt_vid_out	= sh_veu_try_fmt_vid_out,
	.vidioc_s_fmt_vid_out	= sh_veu_s_fmt_vid_out,

	.vidioc_reqbufs		= sh_veu_reqbufs,
	.vidioc_querybuf	= sh_veu_querybuf,

	.vidioc_qbuf		= sh_veu_qbuf,
	.vidioc_dqbuf		= sh_veu_dqbuf,

	.vidioc_streamon	= sh_veu_streamon,
	.vidioc_streamoff	= sh_veu_streamoff,
};

		/* ========== Queue operations ========== */

static int sh_veu_queue_setup(struct vb2_queue *vq,
			      unsigned int *nbuffers, unsigned int *nplanes,
			      unsigned int sizes[], void *alloc_ctxs[])
{
	struct sh_veu_dev *veu = vb2_get_drv_priv(vq);
	struct sh_veu_vfmt *vfmt = sh_veu_get_vfmt(veu, vq->type);
	unsigned int count = *nbuffers;
	unsigned int size = vfmt->bytesperline * vfmt->frame.height *
		vfmt->fmt->depth / vfmt->fmt->ydepth;

	if (count < 2)
		*nbuffers = count = 2;

	if (size * count > VIDEO_MEM_LIMIT) {
		count = VIDEO_MEM_LIMIT / size;
		*nbuffers = count;
	}

	if (*nplanes) {
		alloc_ctxs[0] = veu->alloc_ctx;
		return sizes[0] < size ? -EINVAL : 0;
	}

	*nplanes = 1;
	sizes[0] = size;
	alloc_ctxs[0] = veu->alloc_ctx;

	dev_dbg(veu->dev, "get %d buffer(s) of size %d each.\n", count, size);

	return 0;
}

static int sh_veu_buf_prepare(struct vb2_buffer *vb)
{
	struct sh_veu_dev *veu = vb2_get_drv_priv(vb->vb2_queue);
	struct sh_veu_vfmt *vfmt;
	unsigned int sizeimage;

	vfmt = sh_veu_get_vfmt(veu, vb->vb2_queue->type);
	sizeimage = vfmt->bytesperline * vfmt->frame.height *
		vfmt->fmt->depth / vfmt->fmt->ydepth;

	if (vb2_plane_size(vb, 0) < sizeimage) {
		dev_dbg(veu->dev, "%s data will not fit into plane (%lu < %u)\n",
			__func__, vb2_plane_size(vb, 0), sizeimage);
		return -EINVAL;
	}

	vb2_set_plane_payload(vb, 0, sizeimage);

	return 0;
}

static void sh_veu_buf_queue(struct vb2_buffer *vb)
{
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct sh_veu_dev *veu = vb2_get_drv_priv(vb->vb2_queue);
	dev_dbg(veu->dev, "%s(%d)\n", __func__, vb->type);
	v4l2_m2m_buf_queue(veu->m2m_ctx, vbuf);
}

static const struct vb2_ops sh_veu_qops = {
	.queue_setup	 = sh_veu_queue_setup,
	.buf_prepare	 = sh_veu_buf_prepare,
	.buf_queue	 = sh_veu_buf_queue,
	.wait_prepare	 = vb2_ops_wait_prepare,
	.wait_finish	 = vb2_ops_wait_finish,
};

static int sh_veu_queue_init(void *priv, struct vb2_queue *src_vq,
			     struct vb2_queue *dst_vq)
{
	struct sh_veu_dev *veu = priv;
	int ret;

	memset(src_vq, 0, sizeof(*src_vq));
	src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
	src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
	src_vq->drv_priv = veu;
	src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
	src_vq->ops = &sh_veu_qops;
	src_vq->mem_ops = &vb2_dma_contig_memops;
	src_vq->lock = &veu->fop_lock;
	src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;

	ret = vb2_queue_init(src_vq);
	if (ret < 0)
		return ret;

	memset(dst_vq, 0, sizeof(*dst_vq));
	dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
	dst_vq->drv_priv = veu;
	dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
	dst_vq->ops = &sh_veu_qops;
	dst_vq->mem_ops = &vb2_dma_contig_memops;
	dst_vq->lock = &veu->fop_lock;
	dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;

	return vb2_queue_init(dst_vq);
}

		/* ========== File operations ========== */

static int sh_veu_open(struct file *file)
{
	struct sh_veu_dev *veu = video_drvdata(file);
	struct sh_veu_file *veu_file;

	veu_file = kzalloc(sizeof(*veu_file), GFP_KERNEL);
	if (!veu_file)
		return -ENOMEM;

	veu_file->veu_dev = veu;
	veu_file->cfg_needed = true;

	file->private_data = veu_file;

	pm_runtime_get_sync(veu->dev);

	dev_dbg(veu->dev, "Created instance %p\n", veu_file);

	return 0;
}

static int sh_veu_release(struct file *file)
{
	struct sh_veu_dev *veu = video_drvdata(file);
	struct sh_veu_file *veu_file = file->private_data;

	dev_dbg(veu->dev, "Releasing instance %p\n", veu_file);

	if (veu_file == veu->capture) {
		veu->capture = NULL;
		vb2_queue_release(v4l2_m2m_get_vq(veu->m2m_ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE));
	}

	if (veu_file == veu->output) {
		veu->output = NULL;
		vb2_queue_release(v4l2_m2m_get_vq(veu->m2m_ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT));
	}

	if (!veu->output && !veu->capture && veu->m2m_ctx) {
		v4l2_m2m_ctx_release(veu->m2m_ctx);
		veu->m2m_ctx = NULL;
	}

	pm_runtime_put(veu->dev);

	kfree(veu_file);

	return 0;
}

static unsigned int sh_veu_poll(struct file *file,
				struct poll_table_struct *wait)
{
	struct sh_veu_file *veu_file = file->private_data;

	return v4l2_m2m_poll(file, veu_file->veu_dev->m2m_ctx, wait);
}

static int sh_veu_mmap(struct file *file, struct vm_area_struct *vma)
{
	struct sh_veu_file *veu_file = file->private_data;

	return v4l2_m2m_mmap(file, veu_file->veu_dev->m2m_ctx, vma);
}

static const struct v4l2_file_operations sh_veu_fops = {
	.owner		= THIS_MODULE,
	.open		= sh_veu_open,
	.release	= sh_veu_release,
	.poll		= sh_veu_poll,
	.unlocked_ioctl	= video_ioctl2,
	.mmap		= sh_veu_mmap,
};

static const struct video_device sh_veu_videodev = {
	.name		= "sh-veu",
	.fops		= &sh_veu_fops,
	.ioctl_ops	= &sh_veu_ioctl_ops,
	.minor		= -1,
	.release	= video_device_release_empty,
	.vfl_dir	= VFL_DIR_M2M,
};

static const struct v4l2_m2m_ops sh_veu_m2m_ops = {
	.device_run	= sh_veu_device_run,
	.job_abort	= sh_veu_job_abort,
};

static irqreturn_t sh_veu_bh(int irq, void *dev_id)
{
	struct sh_veu_dev *veu = dev_id;

	if (veu->xaction == MEM2MEM_DEF_TRANSLEN || veu->aborting) {
		v4l2_m2m_job_finish(veu->m2m_dev, veu->m2m_ctx);
		veu->xaction = 0;
	} else {
		sh_veu_device_run(veu);
	}

	return IRQ_HANDLED;
}

static irqreturn_t sh_veu_isr(int irq, void *dev_id)
{
	struct sh_veu_dev *veu = dev_id;
	struct vb2_v4l2_buffer *dst;
	struct vb2_v4l2_buffer *src;
	u32 status = sh_veu_reg_read(veu, VEU_EVTR);

	/* bundle read mode not used */
	if (!(status & 1))
		return IRQ_NONE;

	/* disable interrupt in VEU */
	sh_veu_reg_write(veu, VEU_EIER, 0);
	/* halt operation */
	sh_veu_reg_write(veu, VEU_STR, 0);
	/* ack int, write 0 to clear bits */
	sh_veu_reg_write(veu, VEU_EVTR, status & ~1);

	/* conversion completed */
	dst = v4l2_m2m_dst_buf_remove(veu->m2m_ctx);
	src = v4l2_m2m_src_buf_remove(veu->m2m_ctx);
	if (!src || !dst)
		return IRQ_NONE;

	dst->vb2_buf.timestamp = src->vb2_buf.timestamp;
	dst->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
	dst->flags |=
		src->flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
	dst->timecode = src->timecode;

	spin_lock(&veu->lock);
	v4l2_m2m_buf_done(src, VB2_BUF_STATE_DONE);
	v4l2_m2m_buf_done(dst, VB2_BUF_STATE_DONE);
	spin_unlock(&veu->lock);

	veu->xaction++;

	return IRQ_WAKE_THREAD;
}

static int sh_veu_probe(struct platform_device *pdev)
{
	struct sh_veu_dev *veu;
	struct resource *reg_res;
	struct video_device *vdev;
	int irq, ret;

	reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	irq = platform_get_irq(pdev, 0);

	if (!reg_res || irq <= 0) {
		dev_err(&pdev->dev, "Insufficient VEU platform information.\n");
		return -ENODEV;
	}

	veu = devm_kzalloc(&pdev->dev, sizeof(*veu), GFP_KERNEL);
	if (!veu)
		return -ENOMEM;

	veu->is_2h = resource_size(reg_res) == 0x22c;

	veu->base = devm_ioremap_resource(&pdev->dev, reg_res);
	if (IS_ERR(veu->base))
		return PTR_ERR(veu->base);

	ret = devm_request_threaded_irq(&pdev->dev, irq, sh_veu_isr, sh_veu_bh,
					0, "veu", veu);
	if (ret < 0)
		return ret;

	ret = v4l2_device_register(&pdev->dev, &veu->v4l2_dev);
	if (ret < 0) {
		dev_err(&pdev->dev, "Error registering v4l2 device\n");
		return ret;
	}

	vdev = &veu->vdev;

	veu->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
	if (IS_ERR(veu->alloc_ctx)) {
		ret = PTR_ERR(veu->alloc_ctx);
		goto einitctx;
	}

	*vdev = sh_veu_videodev;
	vdev->v4l2_dev = &veu->v4l2_dev;
	spin_lock_init(&veu->lock);
	mutex_init(&veu->fop_lock);
	vdev->lock = &veu->fop_lock;

	video_set_drvdata(vdev, veu);

	veu->dev	= &pdev->dev;
	veu->vfmt_out	= DEFAULT_OUT_VFMT;
	veu->vfmt_in	= DEFAULT_IN_VFMT;

	veu->m2m_dev = v4l2_m2m_init(&sh_veu_m2m_ops);
	if (IS_ERR(veu->m2m_dev)) {
		ret = PTR_ERR(veu->m2m_dev);
		v4l2_err(&veu->v4l2_dev, "Failed to init mem2mem device: %d\n", ret);
		goto em2minit;
	}

	pm_runtime_enable(&pdev->dev);
	pm_runtime_resume(&pdev->dev);

	ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
	pm_runtime_suspend(&pdev->dev);
	if (ret < 0)
		goto evidreg;

	return ret;

evidreg:
	pm_runtime_disable(&pdev->dev);
	v4l2_m2m_release(veu->m2m_dev);
em2minit:
	vb2_dma_contig_cleanup_ctx(veu->alloc_ctx);
einitctx:
	v4l2_device_unregister(&veu->v4l2_dev);
	return ret;
}

static int sh_veu_remove(struct platform_device *pdev)
{
	struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
	struct sh_veu_dev *veu = container_of(v4l2_dev,
					      struct sh_veu_dev, v4l2_dev);

	video_unregister_device(&veu->vdev);
	pm_runtime_disable(&pdev->dev);
	v4l2_m2m_release(veu->m2m_dev);
	vb2_dma_contig_cleanup_ctx(veu->alloc_ctx);
	v4l2_device_unregister(&veu->v4l2_dev);

	return 0;
}

static struct platform_driver __refdata sh_veu_pdrv = {
	.remove		= sh_veu_remove,
	.driver		= {
		.name	= "sh_veu",
	},
};

module_platform_driver_probe(sh_veu_pdrv, sh_veu_probe);

MODULE_DESCRIPTION("sh-mobile VEU mem2mem driver");
MODULE_AUTHOR("Guennadi Liakhovetski, <g.liakhovetski@gmx.de>");
MODULE_LICENSE("GPL v2");