summaryrefslogtreecommitdiff
path: root/drivers/media/pci/cx25821/cx25821-video.c
blob: 26e3e296d615afdc87d0b49253f3b56772c7f3cd (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
/*
 *  Driver for the Conexant CX25821 PCIe bridge
 *
 *  Copyright (C) 2009 Conexant Systems Inc.
 *  Authors  <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
 *  Based on Steven Toth <stoth@linuxtv.org> cx25821 driver
 *  Parts adapted/taken from Eduardo Moscoso Rubino
 *  Copyright (C) 2009 Eduardo Moscoso Rubino <moscoso@TopoLogica.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.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include "cx25821-video.h"

MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards");
MODULE_AUTHOR("Hiep Huynh <hiep.huynh@conexant.com>");
MODULE_LICENSE("GPL");

static unsigned int video_nr[] = {[0 ... (CX25821_MAXBOARDS - 1)] = UNSET };

module_param_array(video_nr, int, NULL, 0444);

MODULE_PARM_DESC(video_nr, "video device numbers");

static unsigned int video_debug = VIDEO_DEBUG;
module_param(video_debug, int, 0644);
MODULE_PARM_DESC(video_debug, "enable debug messages [video]");

static unsigned int irq_debug;
module_param(irq_debug, int, 0644);
MODULE_PARM_DESC(irq_debug, "enable debug messages [IRQ handler]");

#define FORMAT_FLAGS_PACKED       0x01

static const struct cx25821_fmt formats[] = {
	{
		.name = "4:1:1, packed, Y41P",
		.fourcc = V4L2_PIX_FMT_Y41P,
		.depth = 12,
		.flags = FORMAT_FLAGS_PACKED,
	}, {
		.name = "4:2:2, packed, YUYV",
		.fourcc = V4L2_PIX_FMT_YUYV,
		.depth = 16,
		.flags = FORMAT_FLAGS_PACKED,
	},
};

static const struct cx25821_fmt *cx25821_format_by_fourcc(unsigned int fourcc)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(formats); i++)
		if (formats[i].fourcc == fourcc)
			return formats + i;
	return NULL;
}

int cx25821_start_video_dma(struct cx25821_dev *dev,
			    struct cx25821_dmaqueue *q,
			    struct cx25821_buffer *buf,
			    const struct sram_channel *channel)
{
	int tmp = 0;

	/* setup fifo + format */
	cx25821_sram_channel_setup(dev, channel, buf->bpl, buf->risc.dma);

	/* reset counter */
	cx_write(channel->gpcnt_ctl, 3);

	/* enable irq */
	cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << channel->i));
	cx_set(channel->int_msk, 0x11);

	/* start dma */
	cx_write(channel->dma_ctl, 0x11);	/* FIFO and RISC enable */

	/* make sure upstream setting if any is reversed */
	tmp = cx_read(VID_CH_MODE_SEL);
	cx_write(VID_CH_MODE_SEL, tmp & 0xFFFFFE00);

	return 0;
}

int cx25821_video_irq(struct cx25821_dev *dev, int chan_num, u32 status)
{
	int handled = 0;
	u32 mask;
	const struct sram_channel *channel = dev->channels[chan_num].sram_channels;

	mask = cx_read(channel->int_msk);
	if (0 == (status & mask))
		return handled;

	cx_write(channel->int_stat, status);

	/* risc op code error */
	if (status & (1 << 16)) {
		pr_warn("%s, %s: video risc op code error\n",
			dev->name, channel->name);
		cx_clear(channel->dma_ctl, 0x11);
		cx25821_sram_channel_dump(dev, channel);
	}

	/* risc1 y */
	if (status & FLD_VID_DST_RISC1) {
		struct cx25821_dmaqueue *dmaq =
			&dev->channels[channel->i].dma_vidq;
		struct cx25821_buffer *buf;

		spin_lock(&dev->slock);
		if (!list_empty(&dmaq->active)) {
			buf = list_entry(dmaq->active.next,
					 struct cx25821_buffer, queue);

			v4l2_get_timestamp(&buf->vb.timestamp);
			buf->vb.sequence = dmaq->count++;
			list_del(&buf->queue);
			vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
		}
		spin_unlock(&dev->slock);
		handled++;
	}
	return handled;
}

static int cx25821_queue_setup(struct vb2_queue *q, const void *parg,
			   unsigned int *num_buffers, unsigned int *num_planes,
			   unsigned int sizes[], void *alloc_ctxs[])
{
	const struct v4l2_format *fmt = parg;
	struct cx25821_channel *chan = q->drv_priv;
	unsigned size = (chan->fmt->depth * chan->width * chan->height) >> 3;

	if (fmt && fmt->fmt.pix.sizeimage < size)
		return -EINVAL;

	*num_planes = 1;
	sizes[0] = fmt ? fmt->fmt.pix.sizeimage : size;
	alloc_ctxs[0] = chan->dev->alloc_ctx;
	return 0;
}

static int cx25821_buffer_prepare(struct vb2_buffer *vb)
{
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct cx25821_channel *chan = vb->vb2_queue->drv_priv;
	struct cx25821_dev *dev = chan->dev;
	struct cx25821_buffer *buf =
		container_of(vbuf, struct cx25821_buffer, vb);
	struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0);
	u32 line0_offset;
	int bpl_local = LINE_SIZE_D1;
	int ret;

	if (chan->pixel_formats == PIXEL_FRMT_411)
		buf->bpl = (chan->fmt->depth * chan->width) >> 3;
	else
		buf->bpl = (chan->fmt->depth >> 3) * chan->width;

	if (vb2_plane_size(vb, 0) < chan->height * buf->bpl)
		return -EINVAL;
	vb2_set_plane_payload(vb, 0, chan->height * buf->bpl);
	buf->vb.field = chan->field;

	if (chan->pixel_formats == PIXEL_FRMT_411) {
		bpl_local = buf->bpl;
	} else {
		bpl_local = buf->bpl;   /* Default */

		if (chan->use_cif_resolution) {
			if (dev->tvnorm & V4L2_STD_625_50)
				bpl_local = 352 << 1;
			else
				bpl_local = chan->cif_width << 1;
		}
	}

	switch (chan->field) {
	case V4L2_FIELD_TOP:
		ret = cx25821_risc_buffer(dev->pci, &buf->risc,
				sgt->sgl, 0, UNSET,
				buf->bpl, 0, chan->height);
		break;
	case V4L2_FIELD_BOTTOM:
		ret = cx25821_risc_buffer(dev->pci, &buf->risc,
				sgt->sgl, UNSET, 0,
				buf->bpl, 0, chan->height);
		break;
	case V4L2_FIELD_INTERLACED:
		/* All other formats are top field first */
		line0_offset = 0;
		dprintk(1, "top field first\n");

		ret = cx25821_risc_buffer(dev->pci, &buf->risc,
				sgt->sgl, line0_offset,
				bpl_local, bpl_local, bpl_local,
				chan->height >> 1);
		break;
	case V4L2_FIELD_SEQ_TB:
		ret = cx25821_risc_buffer(dev->pci, &buf->risc,
				sgt->sgl,
				0, buf->bpl * (chan->height >> 1),
				buf->bpl, 0, chan->height >> 1);
		break;
	case V4L2_FIELD_SEQ_BT:
		ret = cx25821_risc_buffer(dev->pci, &buf->risc,
				sgt->sgl,
				buf->bpl * (chan->height >> 1), 0,
				buf->bpl, 0, chan->height >> 1);
		break;
	default:
		WARN_ON(1);
		ret = -EINVAL;
		break;
	}

	dprintk(2, "[%p/%d] buffer_prep - %dx%d %dbpp \"%s\" - dma=0x%08lx\n",
		buf, buf->vb.vb2_buf.index, chan->width, chan->height,
		chan->fmt->depth, chan->fmt->name,
		(unsigned long)buf->risc.dma);

	return ret;
}

static void cx25821_buffer_finish(struct vb2_buffer *vb)
{
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct cx25821_buffer *buf =
		container_of(vbuf, struct cx25821_buffer, vb);
	struct cx25821_channel *chan = vb->vb2_queue->drv_priv;
	struct cx25821_dev *dev = chan->dev;

	cx25821_free_buffer(dev, buf);
}

static void cx25821_buffer_queue(struct vb2_buffer *vb)
{
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct cx25821_buffer *buf =
		container_of(vbuf, struct cx25821_buffer, vb);
	struct cx25821_channel *chan = vb->vb2_queue->drv_priv;
	struct cx25821_dev *dev = chan->dev;
	struct cx25821_buffer *prev;
	struct cx25821_dmaqueue *q = &dev->channels[chan->id].dma_vidq;

	buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 12);
	buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC);
	buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 12);
	buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */

	if (list_empty(&q->active)) {
		list_add_tail(&buf->queue, &q->active);
	} else {
		buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1);
		prev = list_entry(q->active.prev, struct cx25821_buffer,
				queue);
		list_add_tail(&buf->queue, &q->active);
		prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
	}
}

static int cx25821_start_streaming(struct vb2_queue *q, unsigned int count)
{
	struct cx25821_channel *chan = q->drv_priv;
	struct cx25821_dev *dev = chan->dev;
	struct cx25821_dmaqueue *dmaq = &dev->channels[chan->id].dma_vidq;
	struct cx25821_buffer *buf = list_entry(dmaq->active.next,
			struct cx25821_buffer, queue);

	dmaq->count = 0;
	cx25821_start_video_dma(dev, dmaq, buf, chan->sram_channels);
	return 0;
}

static void cx25821_stop_streaming(struct vb2_queue *q)
{
	struct cx25821_channel *chan = q->drv_priv;
	struct cx25821_dev *dev = chan->dev;
	struct cx25821_dmaqueue *dmaq = &dev->channels[chan->id].dma_vidq;
	unsigned long flags;

	cx_write(chan->sram_channels->dma_ctl, 0); /* FIFO and RISC disable */
	spin_lock_irqsave(&dev->slock, flags);
	while (!list_empty(&dmaq->active)) {
		struct cx25821_buffer *buf = list_entry(dmaq->active.next,
			struct cx25821_buffer, queue);

		list_del(&buf->queue);
		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
	}
	spin_unlock_irqrestore(&dev->slock, flags);
}

static struct vb2_ops cx25821_video_qops = {
	.queue_setup    = cx25821_queue_setup,
	.buf_prepare  = cx25821_buffer_prepare,
	.buf_finish = cx25821_buffer_finish,
	.buf_queue    = cx25821_buffer_queue,
	.wait_prepare = vb2_ops_wait_prepare,
	.wait_finish = vb2_ops_wait_finish,
	.start_streaming = cx25821_start_streaming,
	.stop_streaming = cx25821_stop_streaming,
};

/* VIDEO IOCTLS */

static int cx25821_vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
			    struct v4l2_fmtdesc *f)
{
	if (unlikely(f->index >= ARRAY_SIZE(formats)))
		return -EINVAL;

	strlcpy(f->description, formats[f->index].name, sizeof(f->description));
	f->pixelformat = formats[f->index].fourcc;

	return 0;
}

static int cx25821_vidioc_g_fmt_vid_cap(struct file *file, void *priv,
				 struct v4l2_format *f)
{
	struct cx25821_channel *chan = video_drvdata(file);

	f->fmt.pix.width = chan->width;
	f->fmt.pix.height = chan->height;
	f->fmt.pix.field = chan->field;
	f->fmt.pix.pixelformat = chan->fmt->fourcc;
	f->fmt.pix.bytesperline = (chan->width * chan->fmt->depth) >> 3;
	f->fmt.pix.sizeimage = chan->height * f->fmt.pix.bytesperline;
	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;

	return 0;
}

static int cx25821_vidioc_try_fmt_vid_cap(struct file *file, void *priv,
				   struct v4l2_format *f)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;
	const struct cx25821_fmt *fmt;
	enum v4l2_field field = f->fmt.pix.field;
	unsigned int maxh;
	unsigned w;

	fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
	if (NULL == fmt)
		return -EINVAL;
	maxh = (dev->tvnorm & V4L2_STD_625_50) ? 576 : 480;

	w = f->fmt.pix.width;
	if (field != V4L2_FIELD_BOTTOM)
		field = V4L2_FIELD_TOP;
	if (w < 352) {
		w = 176;
		f->fmt.pix.height = maxh / 4;
	} else if (w < 720) {
		w = 352;
		f->fmt.pix.height = maxh / 2;
	} else {
		w = 720;
		f->fmt.pix.height = maxh;
		field = V4L2_FIELD_INTERLACED;
	}
	f->fmt.pix.field = field;
	f->fmt.pix.width = w;
	f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
	f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;

	return 0;
}

static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
				struct v4l2_format *f)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;
	int pix_format = PIXEL_FRMT_422;
	int err;

	err = cx25821_vidioc_try_fmt_vid_cap(file, priv, f);

	if (0 != err)
		return err;

	chan->fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
	chan->field = f->fmt.pix.field;
	chan->width = f->fmt.pix.width;
	chan->height = f->fmt.pix.height;

	if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
		pix_format = PIXEL_FRMT_411;
	else
		pix_format = PIXEL_FRMT_422;

	cx25821_set_pixel_format(dev, SRAM_CH00, pix_format);

	/* check if cif resolution */
	if (chan->width == 320 || chan->width == 352)
		chan->use_cif_resolution = 1;
	else
		chan->use_cif_resolution = 0;

	chan->cif_width = chan->width;
	medusa_set_resolution(dev, chan->width, SRAM_CH00);
	return 0;
}

static int vidioc_log_status(struct file *file, void *priv)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;
	const struct sram_channel *sram_ch = chan->sram_channels;
	u32 tmp = 0;

	tmp = cx_read(sram_ch->dma_ctl);
	pr_info("Video input 0 is %s\n",
		(tmp & 0x11) ? "streaming" : "stopped");
	return 0;
}


static int cx25821_vidioc_querycap(struct file *file, void *priv,
			    struct v4l2_capability *cap)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;
	const u32 cap_input = V4L2_CAP_VIDEO_CAPTURE |
			V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
	const u32 cap_output = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE;

	strcpy(cap->driver, "cx25821");
	strlcpy(cap->card, cx25821_boards[dev->board].name, sizeof(cap->card));
	sprintf(cap->bus_info, "PCIe:%s", pci_name(dev->pci));
	if (chan->id >= VID_CHANNEL_NUM)
		cap->device_caps = cap_output;
	else
		cap->device_caps = cap_input;
	cap->capabilities = cap_input | cap_output | V4L2_CAP_DEVICE_CAPS;
	return 0;
}

static int cx25821_vidioc_g_std(struct file *file, void *priv, v4l2_std_id *tvnorms)
{
	struct cx25821_channel *chan = video_drvdata(file);

	*tvnorms = chan->dev->tvnorm;
	return 0;
}

static int cx25821_vidioc_s_std(struct file *file, void *priv,
				v4l2_std_id tvnorms)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;

	if (dev->tvnorm == tvnorms)
		return 0;

	dev->tvnorm = tvnorms;
	chan->width = 720;
	chan->height = (dev->tvnorm & V4L2_STD_625_50) ? 576 : 480;

	medusa_set_videostandard(dev);

	return 0;
}

static int cx25821_vidioc_enum_input(struct file *file, void *priv,
			      struct v4l2_input *i)
{
	if (i->index)
		return -EINVAL;

	i->type = V4L2_INPUT_TYPE_CAMERA;
	i->std = CX25821_NORMS;
	strcpy(i->name, "Composite");
	return 0;
}

static int cx25821_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
	*i = 0;
	return 0;
}

static int cx25821_vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
	return i ? -EINVAL : 0;
}

static int cx25821_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct cx25821_channel *chan =
		container_of(ctrl->handler, struct cx25821_channel, hdl);
	struct cx25821_dev *dev = chan->dev;

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
		medusa_set_brightness(dev, ctrl->val, chan->id);
		break;
	case V4L2_CID_HUE:
		medusa_set_hue(dev, ctrl->val, chan->id);
		break;
	case V4L2_CID_CONTRAST:
		medusa_set_contrast(dev, ctrl->val, chan->id);
		break;
	case V4L2_CID_SATURATION:
		medusa_set_saturation(dev, ctrl->val, chan->id);
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static int cx25821_vidioc_enum_output(struct file *file, void *priv,
			      struct v4l2_output *o)
{
	if (o->index)
		return -EINVAL;

	o->type = V4L2_INPUT_TYPE_CAMERA;
	o->std = CX25821_NORMS;
	strcpy(o->name, "Composite");
	return 0;
}

static int cx25821_vidioc_g_output(struct file *file, void *priv, unsigned int *o)
{
	*o = 0;
	return 0;
}

static int cx25821_vidioc_s_output(struct file *file, void *priv, unsigned int o)
{
	return o ? -EINVAL : 0;
}

static int cx25821_vidioc_try_fmt_vid_out(struct file *file, void *priv,
				   struct v4l2_format *f)
{
	struct cx25821_channel *chan = video_drvdata(file);
	struct cx25821_dev *dev = chan->dev;
	const struct cx25821_fmt *fmt;

	fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
	if (NULL == fmt)
		return -EINVAL;
	f->fmt.pix.width = 720;
	f->fmt.pix.height = (dev->tvnorm & V4L2_STD_625_50) ? 576 : 480;
	f->fmt.pix.field = V4L2_FIELD_INTERLACED;
	f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
	f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
	return 0;
}

static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
				struct v4l2_format *f)
{
	struct cx25821_channel *chan = video_drvdata(file);
	int err;

	err = cx25821_vidioc_try_fmt_vid_out(file, priv, f);

	if (0 != err)
		return err;

	chan->fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat);
	chan->field = f->fmt.pix.field;
	chan->width = f->fmt.pix.width;
	chan->height = f->fmt.pix.height;
	if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_Y41P)
		chan->pixel_formats = PIXEL_FRMT_411;
	else
		chan->pixel_formats = PIXEL_FRMT_422;
	return 0;
}

static const struct v4l2_ctrl_ops cx25821_ctrl_ops = {
	.s_ctrl = cx25821_s_ctrl,
};

static const struct v4l2_file_operations video_fops = {
	.owner = THIS_MODULE,
	.open = v4l2_fh_open,
	.release        = vb2_fop_release,
	.read           = vb2_fop_read,
	.poll		= vb2_fop_poll,
	.unlocked_ioctl = video_ioctl2,
	.mmap           = vb2_fop_mmap,
};

static const struct v4l2_ioctl_ops video_ioctl_ops = {
	.vidioc_querycap = cx25821_vidioc_querycap,
	.vidioc_enum_fmt_vid_cap = cx25821_vidioc_enum_fmt_vid_cap,
	.vidioc_g_fmt_vid_cap = cx25821_vidioc_g_fmt_vid_cap,
	.vidioc_try_fmt_vid_cap = cx25821_vidioc_try_fmt_vid_cap,
	.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
	.vidioc_reqbufs       = vb2_ioctl_reqbufs,
	.vidioc_prepare_buf   = vb2_ioctl_prepare_buf,
	.vidioc_create_bufs   = vb2_ioctl_create_bufs,
	.vidioc_querybuf      = vb2_ioctl_querybuf,
	.vidioc_qbuf          = vb2_ioctl_qbuf,
	.vidioc_dqbuf         = vb2_ioctl_dqbuf,
	.vidioc_streamon      = vb2_ioctl_streamon,
	.vidioc_streamoff     = vb2_ioctl_streamoff,
	.vidioc_g_std = cx25821_vidioc_g_std,
	.vidioc_s_std = cx25821_vidioc_s_std,
	.vidioc_enum_input = cx25821_vidioc_enum_input,
	.vidioc_g_input = cx25821_vidioc_g_input,
	.vidioc_s_input = cx25821_vidioc_s_input,
	.vidioc_log_status = vidioc_log_status,
	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};

static const struct video_device cx25821_video_device = {
	.name = "cx25821-video",
	.fops = &video_fops,
	.release = video_device_release_empty,
	.minor = -1,
	.ioctl_ops = &video_ioctl_ops,
	.tvnorms = CX25821_NORMS,
};

static const struct v4l2_file_operations video_out_fops = {
	.owner = THIS_MODULE,
	.open = v4l2_fh_open,
	.release        = vb2_fop_release,
	.write          = vb2_fop_write,
	.poll		= vb2_fop_poll,
	.unlocked_ioctl = video_ioctl2,
	.mmap           = vb2_fop_mmap,
};

static const struct v4l2_ioctl_ops video_out_ioctl_ops = {
	.vidioc_querycap = cx25821_vidioc_querycap,
	.vidioc_enum_fmt_vid_out = cx25821_vidioc_enum_fmt_vid_cap,
	.vidioc_g_fmt_vid_out = cx25821_vidioc_g_fmt_vid_cap,
	.vidioc_try_fmt_vid_out = cx25821_vidioc_try_fmt_vid_out,
	.vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
	.vidioc_g_std = cx25821_vidioc_g_std,
	.vidioc_s_std = cx25821_vidioc_s_std,
	.vidioc_enum_output = cx25821_vidioc_enum_output,
	.vidioc_g_output = cx25821_vidioc_g_output,
	.vidioc_s_output = cx25821_vidioc_s_output,
	.vidioc_log_status = vidioc_log_status,
};

static const struct video_device cx25821_video_out_device = {
	.name = "cx25821-video",
	.fops = &video_out_fops,
	.release = video_device_release_empty,
	.minor = -1,
	.ioctl_ops = &video_out_ioctl_ops,
	.tvnorms = CX25821_NORMS,
};

void cx25821_video_unregister(struct cx25821_dev *dev, int chan_num)
{
	cx_clear(PCI_INT_MSK, 1);

	if (video_is_registered(&dev->channels[chan_num].vdev)) {
		video_unregister_device(&dev->channels[chan_num].vdev);
		v4l2_ctrl_handler_free(&dev->channels[chan_num].hdl);
	}
}

int cx25821_video_register(struct cx25821_dev *dev)
{
	int err;
	int i;

	/* initial device configuration */
	dev->tvnorm = V4L2_STD_NTSC_M;

	spin_lock_init(&dev->slock);

	for (i = 0; i < MAX_VID_CAP_CHANNEL_NUM - 1; ++i) {
		struct cx25821_channel *chan = &dev->channels[i];
		struct video_device *vdev = &chan->vdev;
		struct v4l2_ctrl_handler *hdl = &chan->hdl;
		struct vb2_queue *q;
		bool is_output = i > SRAM_CH08;

		if (i == SRAM_CH08) /* audio channel */
			continue;

		if (!is_output) {
			v4l2_ctrl_handler_init(hdl, 4);
			v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
					V4L2_CID_BRIGHTNESS, 0, 10000, 1, 6200);
			v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
					V4L2_CID_CONTRAST, 0, 10000, 1, 5000);
			v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
					V4L2_CID_SATURATION, 0, 10000, 1, 5000);
			v4l2_ctrl_new_std(hdl, &cx25821_ctrl_ops,
					V4L2_CID_HUE, 0, 10000, 1, 5000);
			if (hdl->error) {
				err = hdl->error;
				goto fail_unreg;
			}
			err = v4l2_ctrl_handler_setup(hdl);
			if (err)
				goto fail_unreg;
		} else {
			chan->out = &dev->vid_out_data[i - SRAM_CH09];
			chan->out->chan = chan;
		}

		chan->sram_channels = &cx25821_sram_channels[i];
		chan->width = 720;
		chan->field = V4L2_FIELD_INTERLACED;
		if (dev->tvnorm & V4L2_STD_625_50)
			chan->height = 576;
		else
			chan->height = 480;

		if (chan->pixel_formats == PIXEL_FRMT_411)
			chan->fmt = cx25821_format_by_fourcc(V4L2_PIX_FMT_Y41P);
		else
			chan->fmt = cx25821_format_by_fourcc(V4L2_PIX_FMT_YUYV);

		cx_write(chan->sram_channels->int_stat, 0xffffffff);

		INIT_LIST_HEAD(&chan->dma_vidq.active);

		q = &chan->vidq;

		q->type = is_output ? V4L2_BUF_TYPE_VIDEO_OUTPUT :
				      V4L2_BUF_TYPE_VIDEO_CAPTURE;
		q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
		q->io_modes |= is_output ? VB2_WRITE : VB2_READ;
		q->gfp_flags = GFP_DMA32;
		q->min_buffers_needed = 2;
		q->drv_priv = chan;
		q->buf_struct_size = sizeof(struct cx25821_buffer);
		q->ops = &cx25821_video_qops;
		q->mem_ops = &vb2_dma_sg_memops;
		q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
		q->lock = &dev->lock;

		if (!is_output) {
			err = vb2_queue_init(q);
			if (err < 0)
				goto fail_unreg;
		}

		/* register v4l devices */
		*vdev = is_output ? cx25821_video_out_device : cx25821_video_device;
		vdev->v4l2_dev = &dev->v4l2_dev;
		if (!is_output)
			vdev->ctrl_handler = hdl;
		else
			vdev->vfl_dir = VFL_DIR_TX;
		vdev->lock = &dev->lock;
		vdev->queue = q;
		snprintf(vdev->name, sizeof(vdev->name), "%s #%d", dev->name, i);
		video_set_drvdata(vdev, chan);

		err = video_register_device(vdev, VFL_TYPE_GRABBER,
					    video_nr[dev->nr]);

		if (err < 0)
			goto fail_unreg;
	}

	/* set PCI interrupt */
	cx_set(PCI_INT_MSK, 0xff);

	return 0;

fail_unreg:
	while (i >= 0)
		cx25821_video_unregister(dev, i--);
	return err;
}