summaryrefslogtreecommitdiffstats
path: root/drivers/media/video/s5p-tv/mixer_video.c
blob: 4917e2c2b321ee8a74b7528b732e2807e4ff04cb (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
/*
 * Samsung TV Mixer driver
 *
 * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
 *
 * Tomasz Stanislawski, <t.stanislaws@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation. either version 2 of the License,
 * or (at your option) any later version
 */

#include "mixer.h"

#include <media/v4l2-ioctl.h>
#include <linux/videodev2.h>
#include <linux/mm.h>
#include <linux/version.h>
#include <linux/timer.h>
#include <media/videobuf2-dma-contig.h>

static int find_reg_callback(struct device *dev, void *p)
{
	struct v4l2_subdev **sd = p;

	*sd = dev_get_drvdata(dev);
	/* non-zero value stops iteration */
	return 1;
}

static struct v4l2_subdev *find_and_register_subdev(
	struct mxr_device *mdev, char *module_name)
{
	struct device_driver *drv;
	struct v4l2_subdev *sd = NULL;
	int ret;

	/* TODO: add waiting until probe is finished */
	drv = driver_find(module_name, &platform_bus_type);
	if (!drv) {
		mxr_warn(mdev, "module %s is missing\n", module_name);
		return NULL;
	}
	/* driver refcnt is increased, it is safe to iterate over devices */
	ret = driver_for_each_device(drv, NULL, &sd, find_reg_callback);
	/* ret == 0 means that find_reg_callback was never executed */
	if (sd == NULL) {
		mxr_warn(mdev, "module %s provides no subdev!\n", module_name);
		goto done;
	}
	/* v4l2_device_register_subdev detects if sd is NULL */
	ret = v4l2_device_register_subdev(&mdev->v4l2_dev, sd);
	if (ret) {
		mxr_warn(mdev, "failed to register subdev %s\n", sd->name);
		sd = NULL;
	}

done:
	put_driver(drv);
	return sd;
}

int __devinit mxr_acquire_video(struct mxr_device *mdev,
	struct mxr_output_conf *output_conf, int output_count)
{
	struct device *dev = mdev->dev;
	struct v4l2_device *v4l2_dev = &mdev->v4l2_dev;
	int i;
	int ret = 0;
	struct v4l2_subdev *sd;

	strlcpy(v4l2_dev->name, dev_name(mdev->dev), sizeof(v4l2_dev->name));
	/* prepare context for V4L2 device */
	ret = v4l2_device_register(dev, v4l2_dev);
	if (ret) {
		mxr_err(mdev, "could not register v4l2 device.\n");
		goto fail;
	}

	mdev->alloc_ctx = vb2_dma_contig_init_ctx(mdev->dev);
	if (IS_ERR_OR_NULL(mdev->alloc_ctx)) {
		mxr_err(mdev, "could not acquire vb2 allocator\n");
		goto fail_v4l2_dev;
	}

	/* registering outputs */
	mdev->output_cnt = 0;
	for (i = 0; i < output_count; ++i) {
		struct mxr_output_conf *conf = &output_conf[i];
		struct mxr_output *out;

		sd = find_and_register_subdev(mdev, conf->module_name);
		/* trying to register next output */
		if (sd == NULL)
			continue;
		out = kzalloc(sizeof *out, GFP_KERNEL);
		if (out == NULL) {
			mxr_err(mdev, "no memory for '%s'\n",
				conf->output_name);
			ret = -ENOMEM;
			/* registered subdevs are removed in fail_v4l2_dev */
			goto fail_output;
		}
		strlcpy(out->name, conf->output_name, sizeof(out->name));
		out->sd = sd;
		out->cookie = conf->cookie;
		mdev->output[mdev->output_cnt++] = out;
		mxr_info(mdev, "added output '%s' from module '%s'\n",
			conf->output_name, conf->module_name);
		/* checking if maximal number of outputs is reached */
		if (mdev->output_cnt >= MXR_MAX_OUTPUTS)
			break;
	}

	if (mdev->output_cnt == 0) {
		mxr_err(mdev, "failed to register any output\n");
		ret = -ENODEV;
		/* skipping fail_output because there is nothing to free */
		goto fail_vb2_allocator;
	}

	return 0;

fail_output:
	/* kfree is NULL-safe */
	for (i = 0; i < mdev->output_cnt; ++i)
		kfree(mdev->output[i]);
	memset(mdev->output, 0, sizeof mdev->output);

fail_vb2_allocator:
	/* freeing allocator context */
	vb2_dma_contig_cleanup_ctx(mdev->alloc_ctx);

fail_v4l2_dev:
	/* NOTE: automatically unregister all subdevs */
	v4l2_device_unregister(v4l2_dev);

fail:
	return ret;
}

void __devexit mxr_release_video(struct mxr_device *mdev)
{
	int i;

	/* kfree is NULL-safe */
	for (i = 0; i < mdev->output_cnt; ++i)
		kfree(mdev->output[i]);

	vb2_dma_contig_cleanup_ctx(mdev->alloc_ctx);
	v4l2_device_unregister(&mdev->v4l2_dev);
}

static int mxr_querycap(struct file *file, void *priv,
	struct v4l2_capability *cap)
{
	struct mxr_layer *layer = video_drvdata(file);

	mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);

	strlcpy(cap->driver, MXR_DRIVER_NAME, sizeof cap->driver);
	strlcpy(cap->card, layer->vfd.name, sizeof cap->card);
	sprintf(cap->bus_info, "%d", layer->idx);
	cap->version = KERNEL_VERSION(0, 1, 0);
	cap->capabilities = V4L2_CAP_STREAMING |
		V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_VIDEO_OUTPUT_MPLANE;

	return 0;
}

/* Geometry handling */
static void mxr_layer_geo_fix(struct mxr_layer *layer)
{
	struct mxr_device *mdev = layer->mdev;
	struct v4l2_mbus_framefmt mbus_fmt;

	/* TODO: add some dirty flag to avoid unnecessary adjustments */
	mxr_get_mbus_fmt(mdev, &mbus_fmt);
	layer->geo.dst.full_width = mbus_fmt.width;
	layer->geo.dst.full_height = mbus_fmt.height;
	layer->geo.dst.field = mbus_fmt.field;
	layer->ops.fix_geometry(layer);
}

static void mxr_layer_default_geo(struct mxr_layer *layer)
{
	struct mxr_device *mdev = layer->mdev;
	struct v4l2_mbus_framefmt mbus_fmt;

	memset(&layer->geo, 0, sizeof layer->geo);

	mxr_get_mbus_fmt(mdev, &mbus_fmt);

	layer->geo.dst.full_width = mbus_fmt.width;
	layer->geo.dst.full_height = mbus_fmt.height;
	layer->geo.dst.width = layer->geo.dst.full_width;
	layer->geo.dst.height = layer->geo.dst.full_height;
	layer->geo.dst.field = mbus_fmt.field;

	layer->geo.src.full_width = mbus_fmt.width;
	layer->geo.src.full_height = mbus_fmt.height;
	layer->geo.src.width = layer->geo.src.full_width;
	layer->geo.src.height = layer->geo.src.full_height;

	layer->ops.fix_geometry(layer);
}

static void mxr_geometry_dump(struct mxr_device *mdev, struct mxr_geometry *geo)
{
	mxr_dbg(mdev, "src.full_size = (%u, %u)\n",
		geo->src.full_width, geo->src.full_height);
	mxr_dbg(mdev, "src.size = (%u, %u)\n",
		geo->src.width, geo->src.height);
	mxr_dbg(mdev, "src.offset = (%u, %u)\n",
		geo->src.x_offset, geo->src.y_offset);
	mxr_dbg(mdev, "dst.full_size = (%u, %u)\n",
		geo->dst.full_width, geo->dst.full_height);
	mxr_dbg(mdev, "dst.size = (%u, %u)\n",
		geo->dst.width, geo->dst.height);
	mxr_dbg(mdev, "dst.offset = (%u, %u)\n",
		geo->dst.x_offset, geo->dst.y_offset);
	mxr_dbg(mdev, "ratio = (%u, %u)\n",
		geo->x_ratio, geo->y_ratio);
}


static const struct mxr_format *find_format_by_fourcc(
	struct mxr_layer *layer, unsigned long fourcc);
static const struct mxr_format *find_format_by_index(
	struct mxr_layer *layer, unsigned long index);

static int mxr_enum_fmt(struct file *file, void  *priv,
	struct v4l2_fmtdesc *f)
{
	struct mxr_layer *layer = video_drvdata(file);
	struct mxr_device *mdev = layer->mdev;
	const struct mxr_format *fmt;

	mxr_dbg(mdev, "%s\n", __func__);
	fmt = find_format_by_index(layer, f->index);
	if (fmt == NULL)
		return -EINVAL;

	strlcpy(f->description, fmt->name, sizeof(f->description));
	f->pixelformat = fmt->fourcc;

	return 0;
}

static int mxr_s_fmt(struct file *file, void *priv,
	struct v4l2_format *f)
{
	struct mxr_layer *layer = video_drvdata(file);
	const struct mxr_format *fmt;
	struct v4l2_pix_format_mplane *pix;
	struct mxr_device *mdev = layer->mdev;
	struct mxr_geometry *geo = &layer->geo;

	mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);

	pix = &f->fmt.pix_mp;
	fmt = find_format_by_fourcc(layer, pix->pixelformat);
	if (fmt == NULL) {
		mxr_warn(mdev, "not recognized fourcc: %08x\n",
			pix->pixelformat);
		return -EINVAL;
	}
	layer->fmt = fmt;
	geo->src.full_width = pix->width;
	geo->src.width = pix->width;
	geo->src.full_height = pix->height;
	geo->src.height = pix->height;
	/* assure consistency of geometry */
	mxr_layer_geo_fix(layer);
	mxr_dbg(mdev, "width=%u height=%u span=%u\n",
		geo->src.width, geo->src.height, geo->src.full_width);

	return 0;
}

static unsigned int divup(unsigned int divident, unsigned int divisor)
{
	return (divident + divisor - 1) / divisor;
}

unsigned long mxr_get_plane_size(const struct mxr_block *blk,
	unsigned int width, unsigned int height)
{
	unsigned int bl_width = divup(width, blk->width);
	unsigned int bl_height = divup(height, blk->height);

	return bl_width * bl_height * blk->size;
}

static void mxr_mplane_fill(struct v4l2_plane_pix_format *planes,
	const struct mxr_format *fmt, u32 width, u32 height)
{
	int i;

	memset(planes, 0, sizeof(*planes) * fmt->num_subframes);
	for (i = 0; i < fmt->num_planes; ++i) {
		struct v4l2_plane_pix_format *plane = planes
			+ fmt->plane2subframe[i];
		const struct mxr_block *blk = &fmt->plane[i];
		u32 bl_width = divup(width, blk->width);
		u32 bl_height = divup(height, blk->height);
		u32 sizeimage = bl_width * bl_height * blk->size;
		u16 bytesperline = bl_width * blk->size / blk->height;

		plane->sizeimage += sizeimage;
		plane->bytesperline = max(plane->bytesperline, bytesperline);
	}
}

static int mxr_g_fmt(struct file *file, void *priv,
			     struct v4l2_format *f)
{
	struct mxr_layer *layer = video_drvdata(file);
	struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;

	mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);

	pix->width = layer->geo.src.full_width;
	pix->height = layer->geo.src.full_height;
	pix->field = V4L2_FIELD_NONE;
	pix->pixelformat = layer->fmt->fourcc;
	pix->colorspace = layer->fmt->colorspace;
	mxr_mplane_fill(pix->plane_fmt, layer->fmt, pix->width, pix->height);

	return 0;
}

static inline struct mxr_crop *choose_crop_by_type(struct mxr_geometry *geo,
	enum v4l2_buf_type type)
{
	switch (type) {
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
		return &geo->dst;
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
		return &geo->src;
	default:
		return NULL;
	}
}

static int mxr_g_crop(struct file *file, void *fh, struct v4l2_crop *a)
{
	struct mxr_layer *layer = video_drvdata(file);
	struct mxr_crop *crop;

	mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
	crop = choose_crop_by_type(&layer->geo, a->type);
	if (crop == NULL)
		return -EINVAL;
	mxr_layer_geo_fix(layer);
	a->c.left = crop->x_offset;
	a->c.top = crop->y_offset;
	a->c.width = crop->width;
	a->c.height = crop->height;
	return 0;
}

static int mxr_s_crop(struct file *file, void *fh, struct v4l2_crop *a)
{
	struct mxr_layer *layer = video_drvdata(file);
	struct mxr_crop *crop;

	mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
	crop = choose_crop_by_type(&layer->geo, a->type);
	if (crop == NULL)
		return -EINVAL;
	crop->x_offset = a->c.left;
	crop->y_offset = a->c.top;
	crop->width = a->c.width;
	crop->height = a->c.height;
	mxr_layer_geo_fix(layer);
	return 0;
}

static int mxr_cropcap(struct file *file, void *fh, struct v4l2_cropcap *a)
{
	struct mxr_layer *layer = video_drvdata(file);
	struct mxr_crop *crop;

	mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
	crop = choose_crop_by_type(&layer->geo, a->type);
	if (crop == NULL)
		return -EINVAL;
	mxr_layer_geo_fix(layer);
	a->bounds.left = 0;
	a->bounds.top = 0;
	a->bounds.width = crop->full_width;
	a->bounds.top = crop->full_height;
	a->defrect = a->bounds;
	/* setting pixel aspect to 1/1 */
	a->pixelaspect.numerator = 1;
	a->pixelaspect.denominator = 1;
	return 0;
}

static int mxr_enum_dv_presets(struct file *file, void *fh,
	struct v4l2_dv_enum_preset *preset)
{
	struct mxr_layer *layer = video_drvdata(file);
	struct mxr_device *mdev = layer->mdev;
	int ret;

	/* lock protects from changing sd_out */
	mutex_lock(&mdev->mutex);
	ret = v4l2_subdev_call(to_outsd(mdev), video, enum_dv_presets, preset);
	mutex_unlock(&mdev->mutex);

	return ret ? -EINVAL : 0;
}

static int mxr_s_dv_preset(struct file *file, void *fh,
	struct v4l2_dv_preset *preset)
{
	struct mxr_layer *layer = video_drvdata(file);
	struct mxr_device *mdev = layer->mdev;
	int ret;

	/* lock protects from changing sd_out */
	mutex_lock(&mdev->mutex);

	/* preset change cannot be done while there is an entity
	 * dependant on output configuration
	 */
	if (mdev->n_output > 0) {
		mutex_unlock(&mdev->mutex);
		return -EBUSY;
	}

	ret = v4l2_subdev_call(to_outsd(mdev), video, s_dv_preset, preset);

	mutex_unlock(&mdev->mutex);

	/* any failure should return EINVAL according to V4L2 doc */
	return ret ? -EINVAL : 0;
}

static int mxr_g_dv_preset(struct file *file, void *fh,
	struct v4l2_dv_preset *preset)
{
	struct mxr_layer *layer = video_drvdata(file);
	struct mxr_device *mdev = layer->mdev;
	int ret;

	/* lock protects from changing sd_out */
	mutex_lock(&mdev->mutex);
	ret = v4l2_subdev_call(to_outsd(mdev), video, g_dv_preset, preset);
	mutex_unlock(&mdev->mutex);

	return ret ? -EINVAL : 0;
}

static int mxr_s_std(struct file *file, void *fh, v4l2_std_id *norm)
{
	struct mxr_layer *layer = video_drvdata(file);
	struct mxr_device *mdev = layer->mdev;
	int ret;

	/* lock protects from changing sd_out */
	mutex_lock(&mdev->mutex);

	/* standard change cannot be done while there is an entity
	 * dependant on output configuration
	 */
	if (mdev->n_output > 0) {
		mutex_unlock(&mdev->mutex);
		return -EBUSY;
	}

	ret = v4l2_subdev_call(to_outsd(mdev), video, s_std_output, *norm);

	mutex_unlock(&mdev->mutex);

	return ret ? -EINVAL : 0;
}

static int mxr_g_std(struct file *file, void *fh, v4l2_std_id *norm)
{
	struct mxr_layer *layer = video_drvdata(file);
	struct mxr_device *mdev = layer->mdev;
	int ret;

	/* lock protects from changing sd_out */
	mutex_lock(&mdev->mutex);
	ret = v4l2_subdev_call(to_outsd(mdev), video, g_std_output, norm);
	mutex_unlock(&mdev->mutex);

	return ret ? -EINVAL : 0;
}

static int mxr_enum_output(struct file *file, void *fh, struct v4l2_output *a)
{
	struct mxr_layer *layer = video_drvdata(file);
	struct mxr_device *mdev = layer->mdev;
	struct mxr_output *out;
	struct v4l2_subdev *sd;

	if (a->index >= mdev->output_cnt)
		return -EINVAL;
	out = mdev->output[a->index];
	BUG_ON(out == NULL);
	sd = out->sd;
	strlcpy(a->name, out->name, sizeof(a->name));

	/* try to obtain supported tv norms */
	v4l2_subdev_call(sd, video, g_tvnorms_output, &a->std);
	a->capabilities = 0;
	if (sd->ops->video && sd->ops->video->s_dv_preset)
		a->capabilities |= V4L2_OUT_CAP_PRESETS;
	if (sd->ops->video && sd->ops->video->s_std_output)
		a->capabilities |= V4L2_OUT_CAP_STD;
	a->type = V4L2_OUTPUT_TYPE_ANALOG;

	return 0;
}

static int mxr_s_output(struct file *file, void *fh, unsigned int i)
{
	struct video_device *vfd = video_devdata(file);
	struct mxr_layer *layer = video_drvdata(file);
	struct mxr_device *mdev = layer->mdev;
	int ret = 0;

	if (i >= mdev->output_cnt || mdev->output[i] == NULL)
		return -EINVAL;

	mutex_lock(&mdev->mutex);
	if (mdev->n_output > 0) {
		ret = -EBUSY;
		goto done;
	}
	mdev->current_output = i;
	vfd->tvnorms = 0;
	v4l2_subdev_call(to_outsd(mdev), video, g_tvnorms_output,
		&vfd->tvnorms);
	mxr_dbg(mdev, "tvnorms = %08llx\n", vfd->tvnorms);

done:
	mutex_unlock(&mdev->mutex);
	return ret;
}

static int mxr_g_output(struct file *file, void *fh, unsigned int *p)
{
	struct mxr_layer *layer = video_drvdata(file);
	struct mxr_device *mdev = layer->mdev;

	mutex_lock(&mdev->mutex);
	*p = mdev->current_output;
	mutex_unlock(&mdev->mutex);

	return 0;
}

static int mxr_reqbufs(struct file *file, void *priv,
			  struct v4l2_requestbuffers *p)
{
	struct mxr_layer *layer = video_drvdata(file);

	mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
	return vb2_reqbufs(&layer->vb_queue, p);
}

static int mxr_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
{
	struct mxr_layer *layer = video_drvdata(file);

	mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
	return vb2_querybuf(&layer->vb_queue, p);
}

static int mxr_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
{
	struct mxr_layer *layer = video_drvdata(file);

	mxr_dbg(layer->mdev, "%s:%d(%d)\n", __func__, __LINE__, p->index);
	return vb2_qbuf(&layer->vb_queue, p);
}

static int mxr_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
{
	struct mxr_layer *layer = video_drvdata(file);

	mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
	return vb2_dqbuf(&layer->vb_queue, p, file->f_flags & O_NONBLOCK);
}

static int mxr_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
{
	struct mxr_layer *layer = video_drvdata(file);

	mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
	return vb2_streamon(&layer->vb_queue, i);
}

static int mxr_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
{
	struct mxr_layer *layer = video_drvdata(file);

	mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
	return vb2_streamoff(&layer->vb_queue, i);
}

static const struct v4l2_ioctl_ops mxr_ioctl_ops = {
	.vidioc_querycap = mxr_querycap,
	/* format handling */
	.vidioc_enum_fmt_vid_out = mxr_enum_fmt,
	.vidioc_s_fmt_vid_out_mplane = mxr_s_fmt,
	.vidioc_g_fmt_vid_out_mplane = mxr_g_fmt,
	/* buffer control */
	.vidioc_reqbufs = mxr_reqbufs,
	.vidioc_querybuf = mxr_querybuf,
	.vidioc_qbuf = mxr_qbuf,
	.vidioc_dqbuf = mxr_dqbuf,
	/* Streaming control */
	.vidioc_streamon = mxr_streamon,
	.vidioc_streamoff = mxr_streamoff,
	/* Preset functions */
	.vidioc_enum_dv_presets = mxr_enum_dv_presets,
	.vidioc_s_dv_preset = mxr_s_dv_preset,
	.vidioc_g_dv_preset = mxr_g_dv_preset,
	/* analog TV standard functions */
	.vidioc_s_std = mxr_s_std,
	.vidioc_g_std = mxr_g_std,
	/* Output handling */
	.vidioc_enum_output = mxr_enum_output,
	.vidioc_s_output = mxr_s_output,
	.vidioc_g_output = mxr_g_output,
	/* Crop ioctls */
	.vidioc_g_crop = mxr_g_crop,
	.vidioc_s_crop = mxr_s_crop,
	.vidioc_cropcap = mxr_cropcap,
};

static int mxr_video_open(struct file *file)
{
	struct mxr_layer *layer = video_drvdata(file);
	struct mxr_device *mdev = layer->mdev;
	int ret = 0;

	mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__);
	/* assure device probe is finished */
	wait_for_device_probe();
	/* creating context for file descriptor */
	ret = v4l2_fh_open(file);
	if (ret) {
		mxr_err(mdev, "v4l2_fh_open failed\n");
		return ret;
	}

	/* leaving if layer is already initialized */
	if (!v4l2_fh_is_singular_file(file))
		return 0;

	/* FIXME: should power be enabled on open? */
	ret = mxr_power_get(mdev);
	if (ret) {
		mxr_err(mdev, "power on failed\n");
		goto fail_fh_open;
	}

	ret = vb2_queue_init(&layer->vb_queue);
	if (ret != 0) {
		mxr_err(mdev, "failed to initialize vb2 queue\n");
		goto fail_power;
	}
	/* set default format, first on the list */
	layer->fmt = layer->fmt_array[0];
	/* setup default geometry */
	mxr_layer_default_geo(layer);

	return 0;

fail_power:
	mxr_power_put(mdev);

fail_fh_open:
	v4l2_fh_release(file);

	return ret;
}

static unsigned int
mxr_video_poll(struct file *file, struct poll_table_struct *wait)
{
	struct mxr_layer *layer = video_drvdata(file);

	mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);

	return vb2_poll(&layer->vb_queue, file, wait);
}

static int mxr_video_mmap(struct file *file, struct vm_area_struct *vma)
{
	struct mxr_layer *layer = video_drvdata(file);

	mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);

	return vb2_mmap(&layer->vb_queue, vma);
}

static int mxr_video_release(struct file *file)
{
	struct mxr_layer *layer = video_drvdata(file);

	mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__);
	if (v4l2_fh_is_singular_file(file)) {
		vb2_queue_release(&layer->vb_queue);
		mxr_power_put(layer->mdev);
	}
	v4l2_fh_release(file);
	return 0;
}

static const struct v4l2_file_operations mxr_fops = {
	.owner = THIS_MODULE,
	.open = mxr_video_open,
	.poll = mxr_video_poll,
	.mmap = mxr_video_mmap,
	.release = mxr_video_release,
	.unlocked_ioctl = video_ioctl2,
};

static int queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
	unsigned int *nplanes, unsigned int sizes[],
	void *alloc_ctxs[])
{
	struct mxr_layer *layer = vb2_get_drv_priv(vq);
	const struct mxr_format *fmt = layer->fmt;
	int i;
	struct mxr_device *mdev = layer->mdev;
	struct v4l2_plane_pix_format planes[3];

	mxr_dbg(mdev, "%s\n", __func__);
	/* checking if format was configured */
	if (fmt == NULL)
		return -EINVAL;
	mxr_dbg(mdev, "fmt = %s\n", fmt->name);
	mxr_mplane_fill(planes, fmt, layer->geo.src.full_width,
		layer->geo.src.full_height);

	*nplanes = fmt->num_subframes;
	for (i = 0; i < fmt->num_subframes; ++i) {
		alloc_ctxs[i] = layer->mdev->alloc_ctx;
		sizes[i] = PAGE_ALIGN(planes[i].sizeimage);
		mxr_dbg(mdev, "size[%d] = %08lx\n", i, sizes[i]);
	}

	if (*nbuffers == 0)
		*nbuffers = 1;

	return 0;
}

static void buf_queue(struct vb2_buffer *vb)
{
	struct mxr_buffer *buffer = container_of(vb, struct mxr_buffer, vb);
	struct mxr_layer *layer = vb2_get_drv_priv(vb->vb2_queue);
	struct mxr_device *mdev = layer->mdev;
	unsigned long flags;

	spin_lock_irqsave(&layer->enq_slock, flags);
	list_add_tail(&buffer->list, &layer->enq_list);
	spin_unlock_irqrestore(&layer->enq_slock, flags);

	mxr_dbg(mdev, "queuing buffer\n");
}

static void wait_lock(struct vb2_queue *vq)
{
	struct mxr_layer *layer = vb2_get_drv_priv(vq);

	mxr_dbg(layer->mdev, "%s\n", __func__);
	mutex_lock(&layer->mutex);
}

static void wait_unlock(struct vb2_queue *vq)
{
	struct mxr_layer *layer = vb2_get_drv_priv(vq);

	mxr_dbg(layer->mdev, "%s\n", __func__);
	mutex_unlock(&layer->mutex);
}

static int start_streaming(struct vb2_queue *vq, unsigned int count)
{
	struct mxr_layer *layer = vb2_get_drv_priv(vq);
	struct mxr_device *mdev = layer->mdev;
	unsigned long flags;

	mxr_dbg(mdev, "%s\n", __func__);

	if (count == 0) {
		mxr_dbg(mdev, "no output buffers queued\n");
		return -EINVAL;
	}

	/* block any changes in output configuration */
	mxr_output_get(mdev);

	/* update layers geometry */
	mxr_layer_geo_fix(layer);
	mxr_geometry_dump(mdev, &layer->geo);

	layer->ops.format_set(layer);
	/* enabling layer in hardware */
	spin_lock_irqsave(&layer->enq_slock, flags);
	layer->state = MXR_LAYER_STREAMING;
	spin_unlock_irqrestore(&layer->enq_slock, flags);

	layer->ops.stream_set(layer, MXR_ENABLE);
	mxr_streamer_get(mdev);

	return 0;
}

static void mxr_watchdog(unsigned long arg)
{
	struct mxr_layer *layer = (struct mxr_layer *) arg;
	struct mxr_device *mdev = layer->mdev;
	unsigned long flags;

	mxr_err(mdev, "watchdog fired for layer %s\n", layer->vfd.name);

	spin_lock_irqsave(&layer->enq_slock, flags);

	if (layer->update_buf == layer->shadow_buf)
		layer->update_buf = NULL;
	if (layer->update_buf) {
		vb2_buffer_done(&layer->update_buf->vb, VB2_BUF_STATE_ERROR);
		layer->update_buf = NULL;
	}
	if (layer->shadow_buf) {
		vb2_buffer_done(&layer->shadow_buf->vb, VB2_BUF_STATE_ERROR);
		layer->shadow_buf = NULL;
	}
	spin_unlock_irqrestore(&layer->enq_slock, flags);
}

static int stop_streaming(struct vb2_queue *vq)
{
	struct mxr_layer *layer = vb2_get_drv_priv(vq);
	struct mxr_device *mdev = layer->mdev;
	unsigned long flags;
	struct timer_list watchdog;
	struct mxr_buffer *buf, *buf_tmp;

	mxr_dbg(mdev, "%s\n", __func__);

	spin_lock_irqsave(&layer->enq_slock, flags);

	/* reset list */
	layer->state = MXR_LAYER_STREAMING_FINISH;

	/* set all buffer to be done */
	list_for_each_entry_safe(buf, buf_tmp, &layer->enq_list, list) {
		list_del(&buf->list);
		vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
	}

	spin_unlock_irqrestore(&layer->enq_slock, flags);

	/* give 1 seconds to complete to complete last buffers */
	setup_timer_on_stack(&watchdog, mxr_watchdog,
		(unsigned long)layer);
	mod_timer(&watchdog, jiffies + msecs_to_jiffies(1000));

	/* wait until all buffers are goes to done state */
	vb2_wait_for_all_buffers(vq);

	/* stop timer if all synchronization is done */
	del_timer_sync(&watchdog);
	destroy_timer_on_stack(&watchdog);

	/* stopping hardware */
	spin_lock_irqsave(&layer->enq_slock, flags);
	layer->state = MXR_LAYER_IDLE;
	spin_unlock_irqrestore(&layer->enq_slock, flags);

	/* disabling layer in hardware */
	layer->ops.stream_set(layer, MXR_DISABLE);
	/* remove one streamer */
	mxr_streamer_put(mdev);
	/* allow changes in output configuration */
	mxr_output_put(mdev);
	return 0;
}

static struct vb2_ops mxr_video_qops = {
	.queue_setup = queue_setup,
	.buf_queue = buf_queue,
	.wait_prepare = wait_unlock,
	.wait_finish = wait_lock,
	.start_streaming = start_streaming,
	.stop_streaming = stop_streaming,
};

/* FIXME: try to put this functions to mxr_base_layer_create */
int mxr_base_layer_register(struct mxr_layer *layer)
{
	struct mxr_device *mdev = layer->mdev;
	int ret;

	ret = video_register_device(&layer->vfd, VFL_TYPE_GRABBER, -1);
	if (ret)
		mxr_err(mdev, "failed to register video device\n");
	else
		mxr_info(mdev, "registered layer %s as /dev/video%d\n",
			layer->vfd.name, layer->vfd.num);
	return ret;
}

void mxr_base_layer_unregister(struct mxr_layer *layer)
{
	video_unregister_device(&layer->vfd);
}

void mxr_layer_release(struct mxr_layer *layer)
{
	if (layer->ops.release)
		layer->ops.release(layer);
}

void mxr_base_layer_release(struct mxr_layer *layer)
{
	kfree(layer);
}

static void mxr_vfd_release(struct video_device *vdev)
{
	printk(KERN_INFO "video device release\n");
}

struct mxr_layer *mxr_base_layer_create(struct mxr_device *mdev,
	int idx, char *name, struct mxr_layer_ops *ops)
{
	struct mxr_layer *layer;

	layer = kzalloc(sizeof *layer, GFP_KERNEL);
	if (layer == NULL) {
		mxr_err(mdev, "not enough memory for layer.\n");
		goto fail;
	}

	layer->mdev = mdev;
	layer->idx = idx;
	layer->ops = *ops;

	spin_lock_init(&layer->enq_slock);
	INIT_LIST_HEAD(&layer->enq_list);
	mutex_init(&layer->mutex);

	layer->vfd = (struct video_device) {
		.minor = -1,
		.release = mxr_vfd_release,
		.fops = &mxr_fops,
		.ioctl_ops = &mxr_ioctl_ops,
	};
	strlcpy(layer->vfd.name, name, sizeof(layer->vfd.name));
	/* let framework control PRIORITY */
	set_bit(V4L2_FL_USE_FH_PRIO, &layer->vfd.flags);

	video_set_drvdata(&layer->vfd, layer);
	layer->vfd.lock = &layer->mutex;
	layer->vfd.v4l2_dev = &mdev->v4l2_dev;

	layer->vb_queue = (struct vb2_queue) {
		.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
		.io_modes = VB2_MMAP | VB2_USERPTR,
		.drv_priv = layer,
		.buf_struct_size = sizeof(struct mxr_buffer),
		.ops = &mxr_video_qops,
		.mem_ops = &vb2_dma_contig_memops,
	};

	return layer;

fail:
	return NULL;
}

static const struct mxr_format *find_format_by_fourcc(
	struct mxr_layer *layer, unsigned long fourcc)
{
	int i;

	for (i = 0; i < layer->fmt_array_size; ++i)
		if (layer->fmt_array[i]->fourcc == fourcc)
			return layer->fmt_array[i];
	return NULL;
}

static const struct mxr_format *find_format_by_index(
	struct mxr_layer *layer, unsigned long index)
{
	if (index >= layer->fmt_array_size)
		return NULL;
	return layer->fmt_array[index];
}

OpenPOWER on IntegriCloud