forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathsh_vou.c
1375 lines (1160 loc) · 36.8 KB
/
sh_vou.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: GPL-2.0
/*
* SuperH Video Output Unit (VOU) driver
*
* Copyright (C) 2010, Guennadi Liakhovetski <[email protected]>
*/
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <linux/module.h>
#include <media/drv-intf/sh_vou.h>
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-mediabus.h>
#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-dma-contig.h>
/* Mirror addresses are not available for all registers */
#define VOUER 0
#define VOUCR 4
#define VOUSTR 8
#define VOUVCR 0xc
#define VOUISR 0x10
#define VOUBCR 0x14
#define VOUDPR 0x18
#define VOUDSR 0x1c
#define VOUVPR 0x20
#define VOUIR 0x24
#define VOUSRR 0x28
#define VOUMSR 0x2c
#define VOUHIR 0x30
#define VOUDFR 0x34
#define VOUAD1R 0x38
#define VOUAD2R 0x3c
#define VOUAIR 0x40
#define VOUSWR 0x44
#define VOURCR 0x48
#define VOURPR 0x50
enum sh_vou_status {
SH_VOU_IDLE,
SH_VOU_INITIALISING,
SH_VOU_RUNNING,
};
#define VOU_MIN_IMAGE_WIDTH 16
#define VOU_MAX_IMAGE_WIDTH 720
#define VOU_MIN_IMAGE_HEIGHT 16
struct sh_vou_buffer {
struct vb2_v4l2_buffer vb;
struct list_head list;
};
static inline struct
sh_vou_buffer *to_sh_vou_buffer(struct vb2_v4l2_buffer *vb2)
{
return container_of(vb2, struct sh_vou_buffer, vb);
}
struct sh_vou_device {
struct v4l2_device v4l2_dev;
struct video_device vdev;
struct sh_vou_pdata *pdata;
spinlock_t lock;
void __iomem *base;
/* State information */
struct v4l2_pix_format pix;
struct v4l2_rect rect;
struct list_head buf_list;
v4l2_std_id std;
int pix_idx;
struct vb2_queue queue;
struct sh_vou_buffer *active;
enum sh_vou_status status;
unsigned sequence;
struct mutex fop_lock;
};
/* Register access routines for sides A, B and mirror addresses */
static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg,
u32 value)
{
__raw_writel(value, vou_dev->base + reg);
}
static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg,
u32 value)
{
__raw_writel(value, vou_dev->base + reg);
__raw_writel(value, vou_dev->base + reg + 0x1000);
}
static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg,
u32 value)
{
__raw_writel(value, vou_dev->base + reg + 0x2000);
}
static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg)
{
return __raw_readl(vou_dev->base + reg);
}
static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg,
u32 value, u32 mask)
{
u32 old = __raw_readl(vou_dev->base + reg);
value = (value & mask) | (old & ~mask);
__raw_writel(value, vou_dev->base + reg);
}
static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg,
u32 value, u32 mask)
{
sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask);
}
static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg,
u32 value, u32 mask)
{
sh_vou_reg_a_set(vou_dev, reg, value, mask);
sh_vou_reg_b_set(vou_dev, reg, value, mask);
}
struct sh_vou_fmt {
u32 pfmt;
unsigned char bpp;
unsigned char bpl;
unsigned char rgb;
unsigned char yf;
unsigned char pkf;
};
/* Further pixel formats can be added */
static struct sh_vou_fmt vou_fmt[] = {
{
.pfmt = V4L2_PIX_FMT_NV12,
.bpp = 12,
.bpl = 1,
.yf = 0,
.rgb = 0,
},
{
.pfmt = V4L2_PIX_FMT_NV16,
.bpp = 16,
.bpl = 1,
.yf = 1,
.rgb = 0,
},
{
.pfmt = V4L2_PIX_FMT_RGB24,
.bpp = 24,
.bpl = 3,
.pkf = 2,
.rgb = 1,
},
{
.pfmt = V4L2_PIX_FMT_RGB565,
.bpp = 16,
.bpl = 2,
.pkf = 3,
.rgb = 1,
},
{
.pfmt = V4L2_PIX_FMT_RGB565X,
.bpp = 16,
.bpl = 2,
.pkf = 3,
.rgb = 1,
},
};
static void sh_vou_schedule_next(struct sh_vou_device *vou_dev,
struct vb2_v4l2_buffer *vbuf)
{
dma_addr_t addr1, addr2;
addr1 = vb2_dma_contig_plane_dma_addr(&vbuf->vb2_buf, 0);
switch (vou_dev->pix.pixelformat) {
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV16:
addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height;
break;
default:
addr2 = 0;
}
sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1);
sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2);
}
static void sh_vou_stream_config(struct sh_vou_device *vou_dev)
{
unsigned int row_coeff;
#ifdef __LITTLE_ENDIAN
u32 dataswap = 7;
#else
u32 dataswap = 0;
#endif
switch (vou_dev->pix.pixelformat) {
default:
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV16:
row_coeff = 1;
break;
case V4L2_PIX_FMT_RGB565:
dataswap ^= 1;
fallthrough;
case V4L2_PIX_FMT_RGB565X:
row_coeff = 2;
break;
case V4L2_PIX_FMT_RGB24:
row_coeff = 3;
break;
}
sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
}
/* Locking: caller holds fop_lock mutex */
static int sh_vou_queue_setup(struct vb2_queue *vq,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], struct device *alloc_devs[])
{
struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
struct v4l2_pix_format *pix = &vou_dev->pix;
int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
if (*nplanes)
return sizes[0] < pix->height * bytes_per_line ? -EINVAL : 0;
*nplanes = 1;
sizes[0] = pix->height * bytes_per_line;
return 0;
}
static int sh_vou_buf_prepare(struct vb2_buffer *vb)
{
struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
struct v4l2_pix_format *pix = &vou_dev->pix;
unsigned bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
unsigned size = pix->height * bytes_per_line;
dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
if (vb2_plane_size(vb, 0) < size) {
/* User buffer too small */
dev_warn(vou_dev->v4l2_dev.dev, "buffer too small (%lu < %u)\n",
vb2_plane_size(vb, 0), size);
return -EINVAL;
}
vb2_set_plane_payload(vb, 0, size);
return 0;
}
/* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */
static void sh_vou_buf_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
struct sh_vou_buffer *shbuf = to_sh_vou_buffer(vbuf);
unsigned long flags;
spin_lock_irqsave(&vou_dev->lock, flags);
list_add_tail(&shbuf->list, &vou_dev->buf_list);
spin_unlock_irqrestore(&vou_dev->lock, flags);
}
static int sh_vou_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
struct sh_vou_buffer *buf, *node;
int ret;
vou_dev->sequence = 0;
ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
video, s_stream, 1);
if (ret < 0 && ret != -ENOIOCTLCMD) {
list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
vb2_buffer_done(&buf->vb.vb2_buf,
VB2_BUF_STATE_QUEUED);
list_del(&buf->list);
}
vou_dev->active = NULL;
return ret;
}
buf = list_entry(vou_dev->buf_list.next, struct sh_vou_buffer, list);
vou_dev->active = buf;
/* Start from side A: we use mirror addresses, so, set B */
sh_vou_reg_a_write(vou_dev, VOURPR, 1);
dev_dbg(vou_dev->v4l2_dev.dev, "%s: first buffer status 0x%x\n",
__func__, sh_vou_reg_a_read(vou_dev, VOUSTR));
sh_vou_schedule_next(vou_dev, &buf->vb);
buf = list_entry(buf->list.next, struct sh_vou_buffer, list);
/* Second buffer - initialise register side B */
sh_vou_reg_a_write(vou_dev, VOURPR, 0);
sh_vou_schedule_next(vou_dev, &buf->vb);
/* Register side switching with frame VSYNC */
sh_vou_reg_a_write(vou_dev, VOURCR, 5);
sh_vou_stream_config(vou_dev);
/* Enable End-of-Frame (VSYNC) interrupts */
sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
/* Two buffers on the queue - activate the hardware */
vou_dev->status = SH_VOU_RUNNING;
sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
return 0;
}
static void sh_vou_stop_streaming(struct vb2_queue *vq)
{
struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
struct sh_vou_buffer *buf, *node;
unsigned long flags;
v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
video, s_stream, 0);
/* disable output */
sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
/* ...but the current frame will complete */
sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
msleep(50);
spin_lock_irqsave(&vou_dev->lock, flags);
list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
list_del(&buf->list);
}
vou_dev->active = NULL;
spin_unlock_irqrestore(&vou_dev->lock, flags);
}
static const struct vb2_ops sh_vou_qops = {
.queue_setup = sh_vou_queue_setup,
.buf_prepare = sh_vou_buf_prepare,
.buf_queue = sh_vou_buf_queue,
.start_streaming = sh_vou_start_streaming,
.stop_streaming = sh_vou_stop_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
/* Video IOCTLs */
static int sh_vou_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct sh_vou_device *vou_dev = video_drvdata(file);
dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
strscpy(cap->card, "SuperH VOU", sizeof(cap->card));
strscpy(cap->driver, "sh-vou", sizeof(cap->driver));
strscpy(cap->bus_info, "platform:sh-vou", sizeof(cap->bus_info));
return 0;
}
/* Enumerate formats, that the device can accept from the user */
static int sh_vou_enum_fmt_vid_out(struct file *file, void *priv,
struct v4l2_fmtdesc *fmt)
{
struct sh_vou_device *vou_dev = video_drvdata(file);
if (fmt->index >= ARRAY_SIZE(vou_fmt))
return -EINVAL;
dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
fmt->pixelformat = vou_fmt[fmt->index].pfmt;
return 0;
}
static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *fmt)
{
struct sh_vou_device *vou_dev = video_drvdata(file);
dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
fmt->fmt.pix = vou_dev->pix;
return 0;
}
static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
static const unsigned char vou_scale_v_num[] = {1, 2, 4};
static const unsigned char vou_scale_v_den[] = {1, 1, 1};
static const unsigned char vou_scale_v_fld[] = {0, 1};
static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
int pix_idx, int w_idx, int h_idx)
{
struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
unsigned int black_left, black_top, width_max,
frame_in_height, frame_out_height, frame_out_top;
struct v4l2_rect *rect = &vou_dev->rect;
struct v4l2_pix_format *pix = &vou_dev->pix;
u32 vouvcr = 0, dsr_h, dsr_v;
if (vou_dev->std & V4L2_STD_525_60) {
width_max = 858;
/* height_max = 262; */
} else {
width_max = 864;
/* height_max = 312; */
}
frame_in_height = pix->height / 2;
frame_out_height = rect->height / 2;
frame_out_top = rect->top / 2;
/*
* Cropping scheme: max useful image is 720x480, and the total video
* area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
* sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
* of which the first 33 / 25 clocks HSYNC must be held active. This
* has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
* This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
* exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
* beyond DSR, specified on the left and top by the VPR register "black
* pixels" and out-of-image area (DPR) "background pixels." We fix VPR
* at 138 / 144 : 20, because that's the HSYNC timing, that our first
* client requires, and that's exactly what leaves us 720 pixels for the
* image; we leave VPR[VVP] at default 20 for now, because the client
* doesn't seem to have any special requirements for it. Otherwise we
* could also set it to max - 240 = 22 / 72. Thus VPR depends only on
* the selected standard, and DPR and DSR are selected according to
* cropping. Q: how does the client detect the first valid line? Does
* HSYNC stay inactive during invalid (black) lines?
*/
black_left = width_max - VOU_MAX_IMAGE_WIDTH;
black_top = 20;
dsr_h = rect->width + rect->left;
dsr_v = frame_out_height + frame_out_top;
dev_dbg(vou_dev->v4l2_dev.dev,
"image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
pix->width, frame_in_height, black_left, black_top,
rect->left, frame_out_top, dsr_h, dsr_v);
/* VOUISR height - half of a frame height in frame mode */
sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
/*
* if necessary, we could set VOUHIR to
* max(black_left + dsr_h, width_max) here
*/
if (w_idx)
vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
if (h_idx)
vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
dev_dbg(vou_dev->v4l2_dev.dev, "0x%08x: scaling 0x%x\n",
fmt->pfmt, vouvcr);
/* To produce a colour bar for testing set bit 23 of VOUVCR */
sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
sh_vou_reg_ab_write(vou_dev, VOUDFR,
fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
}
struct sh_vou_geometry {
struct v4l2_rect output;
unsigned int in_width;
unsigned int in_height;
int scale_idx_h;
int scale_idx_v;
};
/*
* Find input geometry, that we can use to produce output, closest to the
* requested rectangle, using VOU scaling
*/
static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
{
/* The compiler cannot know, that best and idx will indeed be set */
unsigned int best_err = UINT_MAX, best = 0, img_height_max;
int i, idx = 0;
if (std & V4L2_STD_525_60)
img_height_max = 480;
else
img_height_max = 576;
/* Image width must be a multiple of 4 */
v4l_bound_align_image(&geo->in_width,
VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
&geo->in_height,
VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
/* Select scales to come as close as possible to the output image */
for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
unsigned int err;
unsigned int found = geo->output.width * vou_scale_h_den[i] /
vou_scale_h_num[i];
if (found > VOU_MAX_IMAGE_WIDTH)
/* scales increase */
break;
err = abs(found - geo->in_width);
if (err < best_err) {
best_err = err;
idx = i;
best = found;
}
if (!err)
break;
}
geo->in_width = best;
geo->scale_idx_h = idx;
best_err = UINT_MAX;
/* This loop can be replaced with one division */
for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
unsigned int err;
unsigned int found = geo->output.height * vou_scale_v_den[i] /
vou_scale_v_num[i];
if (found > img_height_max)
/* scales increase */
break;
err = abs(found - geo->in_height);
if (err < best_err) {
best_err = err;
idx = i;
best = found;
}
if (!err)
break;
}
geo->in_height = best;
geo->scale_idx_v = idx;
}
/*
* Find output geometry, that we can produce, using VOU scaling, closest to
* the requested rectangle
*/
static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
{
unsigned int best_err = UINT_MAX, best = geo->in_width,
width_max, height_max, img_height_max;
int i, idx_h = 0, idx_v = 0;
if (std & V4L2_STD_525_60) {
width_max = 858;
height_max = 262 * 2;
img_height_max = 480;
} else {
width_max = 864;
height_max = 312 * 2;
img_height_max = 576;
}
/* Select scales to come as close as possible to the output image */
for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
unsigned int err;
unsigned int found = geo->in_width * vou_scale_h_num[i] /
vou_scale_h_den[i];
if (found > VOU_MAX_IMAGE_WIDTH)
/* scales increase */
break;
err = abs(found - geo->output.width);
if (err < best_err) {
best_err = err;
idx_h = i;
best = found;
}
if (!err)
break;
}
geo->output.width = best;
geo->scale_idx_h = idx_h;
if (geo->output.left + best > width_max)
geo->output.left = width_max - best;
pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
vou_scale_h_num[idx_h], vou_scale_h_den[idx_h], best);
best_err = UINT_MAX;
/* This loop can be replaced with one division */
for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
unsigned int err;
unsigned int found = geo->in_height * vou_scale_v_num[i] /
vou_scale_v_den[i];
if (found > img_height_max)
/* scales increase */
break;
err = abs(found - geo->output.height);
if (err < best_err) {
best_err = err;
idx_v = i;
best = found;
}
if (!err)
break;
}
geo->output.height = best;
geo->scale_idx_v = idx_v;
if (geo->output.top + best > height_max)
geo->output.top = height_max - best;
pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
vou_scale_v_num[idx_v], vou_scale_v_den[idx_v], best);
}
static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *fmt)
{
struct sh_vou_device *vou_dev = video_drvdata(file);
struct v4l2_pix_format *pix = &fmt->fmt.pix;
unsigned int img_height_max;
int pix_idx;
dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
pix->field = V4L2_FIELD_INTERLACED;
pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
pix->ycbcr_enc = pix->quantization = 0;
for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
break;
if (pix_idx == ARRAY_SIZE(vou_fmt))
return -EINVAL;
if (vou_dev->std & V4L2_STD_525_60)
img_height_max = 480;
else
img_height_max = 576;
v4l_bound_align_image(&pix->width,
VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
&pix->height,
VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
pix->bytesperline = pix->width * vou_fmt[pix_idx].bpl;
pix->sizeimage = pix->height * ((pix->width * vou_fmt[pix_idx].bpp) >> 3);
return 0;
}
static int sh_vou_set_fmt_vid_out(struct sh_vou_device *vou_dev,
struct v4l2_pix_format *pix)
{
unsigned int img_height_max;
struct sh_vou_geometry geo;
struct v4l2_subdev_format format = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
/* Revisit: is this the correct code? */
.format.code = MEDIA_BUS_FMT_YUYV8_2X8,
.format.field = V4L2_FIELD_INTERLACED,
.format.colorspace = V4L2_COLORSPACE_SMPTE170M,
};
struct v4l2_mbus_framefmt *mbfmt = &format.format;
int pix_idx;
int ret;
if (vb2_is_busy(&vou_dev->queue))
return -EBUSY;
for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
break;
geo.in_width = pix->width;
geo.in_height = pix->height;
geo.output = vou_dev->rect;
vou_adjust_output(&geo, vou_dev->std);
mbfmt->width = geo.output.width;
mbfmt->height = geo.output.height;
ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
set_fmt, NULL, &format);
/* Must be implemented, so, don't check for -ENOIOCTLCMD */
if (ret < 0)
return ret;
dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
geo.output.width, geo.output.height, mbfmt->width, mbfmt->height);
if (vou_dev->std & V4L2_STD_525_60)
img_height_max = 480;
else
img_height_max = 576;
/* Sanity checks */
if ((unsigned)mbfmt->width > VOU_MAX_IMAGE_WIDTH ||
(unsigned)mbfmt->height > img_height_max ||
mbfmt->code != MEDIA_BUS_FMT_YUYV8_2X8)
return -EIO;
if (mbfmt->width != geo.output.width ||
mbfmt->height != geo.output.height) {
geo.output.width = mbfmt->width;
geo.output.height = mbfmt->height;
vou_adjust_input(&geo, vou_dev->std);
}
/* We tried to preserve output rectangle, but it could have changed */
vou_dev->rect = geo.output;
pix->width = geo.in_width;
pix->height = geo.in_height;
dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
pix->width, pix->height);
vou_dev->pix_idx = pix_idx;
vou_dev->pix = *pix;
sh_vou_configure_geometry(vou_dev, pix_idx,
geo.scale_idx_h, geo.scale_idx_v);
return 0;
}
static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *fmt)
{
struct sh_vou_device *vou_dev = video_drvdata(file);
int ret = sh_vou_try_fmt_vid_out(file, priv, fmt);
if (ret)
return ret;
return sh_vou_set_fmt_vid_out(vou_dev, &fmt->fmt.pix);
}
static int sh_vou_enum_output(struct file *file, void *fh,
struct v4l2_output *a)
{
struct sh_vou_device *vou_dev = video_drvdata(file);
if (a->index)
return -EINVAL;
strscpy(a->name, "Video Out", sizeof(a->name));
a->type = V4L2_OUTPUT_TYPE_ANALOG;
a->std = vou_dev->vdev.tvnorms;
return 0;
}
static int sh_vou_g_output(struct file *file, void *fh, unsigned int *i)
{
*i = 0;
return 0;
}
static int sh_vou_s_output(struct file *file, void *fh, unsigned int i)
{
return i ? -EINVAL : 0;
}
static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
{
switch (bus_fmt) {
default:
pr_warn("%s(): Invalid bus-format code %d, using default 8-bit\n",
__func__, bus_fmt);
fallthrough;
case SH_VOU_BUS_8BIT:
return 1;
case SH_VOU_BUS_16BIT:
return 0;
case SH_VOU_BUS_BT656:
return 3;
}
}
static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id std_id)
{
struct sh_vou_device *vou_dev = video_drvdata(file);
int ret;
dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, std_id);
if (std_id == vou_dev->std)
return 0;
if (vb2_is_busy(&vou_dev->queue))
return -EBUSY;
ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
s_std_output, std_id);
/* Shall we continue, if the subdev doesn't support .s_std_output()? */
if (ret < 0 && ret != -ENOIOCTLCMD)
return ret;
vou_dev->rect.top = vou_dev->rect.left = 0;
vou_dev->rect.width = VOU_MAX_IMAGE_WIDTH;
if (std_id & V4L2_STD_525_60) {
sh_vou_reg_ab_set(vou_dev, VOUCR,
sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
vou_dev->rect.height = 480;
} else {
sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
vou_dev->rect.height = 576;
}
vou_dev->pix.width = vou_dev->rect.width;
vou_dev->pix.height = vou_dev->rect.height;
vou_dev->pix.bytesperline =
vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpl;
vou_dev->pix.sizeimage = vou_dev->pix.height *
((vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpp) >> 3);
vou_dev->std = std_id;
sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
return 0;
}
static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
{
struct sh_vou_device *vou_dev = video_drvdata(file);
dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
*std = vou_dev->std;
return 0;
}
static int sh_vou_log_status(struct file *file, void *priv)
{
struct sh_vou_device *vou_dev = video_drvdata(file);
pr_info("VOUER: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUER));
pr_info("VOUCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUCR));
pr_info("VOUSTR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSTR));
pr_info("VOUVCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVCR));
pr_info("VOUISR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUISR));
pr_info("VOUBCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUBCR));
pr_info("VOUDPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDPR));
pr_info("VOUDSR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDSR));
pr_info("VOUVPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVPR));
pr_info("VOUIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUIR));
pr_info("VOUSRR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSRR));
pr_info("VOUMSR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUMSR));
pr_info("VOUHIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUHIR));
pr_info("VOUDFR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDFR));
pr_info("VOUAD1R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD1R));
pr_info("VOUAD2R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD2R));
pr_info("VOUAIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAIR));
pr_info("VOUSWR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSWR));
pr_info("VOURCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURCR));
pr_info("VOURPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURPR));
return 0;
}
static int sh_vou_g_selection(struct file *file, void *fh,
struct v4l2_selection *sel)
{
struct sh_vou_device *vou_dev = video_drvdata(file);
if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
return -EINVAL;
switch (sel->target) {
case V4L2_SEL_TGT_COMPOSE:
sel->r = vou_dev->rect;
break;
case V4L2_SEL_TGT_COMPOSE_DEFAULT:
case V4L2_SEL_TGT_COMPOSE_BOUNDS:
sel->r.left = 0;
sel->r.top = 0;
sel->r.width = VOU_MAX_IMAGE_WIDTH;
if (vou_dev->std & V4L2_STD_525_60)
sel->r.height = 480;
else
sel->r.height = 576;
break;
default:
return -EINVAL;
}
return 0;
}
/* Assume a dull encoder, do all the work ourselves. */
static int sh_vou_s_selection(struct file *file, void *fh,
struct v4l2_selection *sel)
{
struct v4l2_rect *rect = &sel->r;
struct sh_vou_device *vou_dev = video_drvdata(file);
struct v4l2_subdev_selection sd_sel = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
.target = V4L2_SEL_TGT_COMPOSE,
};
struct v4l2_pix_format *pix = &vou_dev->pix;
struct sh_vou_geometry geo;
struct v4l2_subdev_format format = {
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
/* Revisit: is this the correct code? */
.format.code = MEDIA_BUS_FMT_YUYV8_2X8,
.format.field = V4L2_FIELD_INTERLACED,
.format.colorspace = V4L2_COLORSPACE_SMPTE170M,
};
unsigned int img_height_max;
int ret;
if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
sel->target != V4L2_SEL_TGT_COMPOSE)
return -EINVAL;
if (vb2_is_busy(&vou_dev->queue))
return -EBUSY;
if (vou_dev->std & V4L2_STD_525_60)
img_height_max = 480;
else
img_height_max = 576;
v4l_bound_align_image(&rect->width,
VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 1,
&rect->height,
VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
if (rect->height + rect->top > img_height_max)
rect->top = img_height_max - rect->height;
geo.output = *rect;
geo.in_width = pix->width;
geo.in_height = pix->height;
/* Configure the encoder one-to-one, position at 0, ignore errors */
sd_sel.r.width = geo.output.width;
sd_sel.r.height = geo.output.height;
/*
* We first issue a S_SELECTION, so that the subsequent S_FMT delivers the
* final encoder configuration.
*/
v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
set_selection, NULL, &sd_sel);
format.format.width = geo.output.width;
format.format.height = geo.output.height;
ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
set_fmt, NULL, &format);
/* Must be implemented, so, don't check for -ENOIOCTLCMD */
if (ret < 0)
return ret;
/* Sanity checks */
if ((unsigned)format.format.width > VOU_MAX_IMAGE_WIDTH ||
(unsigned)format.format.height > img_height_max ||
format.format.code != MEDIA_BUS_FMT_YUYV8_2X8)
return -EIO;
geo.output.width = format.format.width;
geo.output.height = format.format.height;
/*
* No down-scaling. According to the API, current call has precedence:
* https://linuxtv.org/downloads/v4l-dvb-apis/uapi/v4l/crop.html#cropping-structures
*/