aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/usb/hdpvr/hdpvr-video.c
blob: 77c3d331ff31491e7bb86417d29ab4763c8535dc (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
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
/*
 * Hauppauge HD PVR USB driver - video 4 linux 2 interface
 *
 * Copyright (C) 2008      Janne Grunau (j@jannau.net)
 *
 *	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, version 2.
 *
 */

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/usb.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>

#include <linux/videodev2.h>
#include <linux/v4l2-dv-timings.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-common.h>
#include <media/v4l2-dv-timings.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-event.h>
#include "hdpvr.h"

#define BULK_URB_TIMEOUT   90 /* 0.09 seconds */

#define print_buffer_status() { \
		v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,	\
			 "%s:%d buffer stat: %d free, %d proc\n",	\
			 __func__, __LINE__,				\
			 list_size(&dev->free_buff_list),		\
			 list_size(&dev->rec_buff_list)); }

static const struct v4l2_dv_timings hdpvr_dv_timings[] = {
	V4L2_DV_BT_CEA_720X480I59_94,
	V4L2_DV_BT_CEA_720X576I50,
	V4L2_DV_BT_CEA_720X480P59_94,
	V4L2_DV_BT_CEA_720X576P50,
	V4L2_DV_BT_CEA_1280X720P50,
	V4L2_DV_BT_CEA_1280X720P60,
	V4L2_DV_BT_CEA_1920X1080I50,
	V4L2_DV_BT_CEA_1920X1080I60,
};

/* Use 480i59 as the default timings */
#define HDPVR_DEF_DV_TIMINGS_IDX (0)

struct hdpvr_fh {
	struct v4l2_fh fh;
	bool legacy_mode;
};

static uint list_size(struct list_head *list)
{
	struct list_head *tmp;
	uint count = 0;

	list_for_each(tmp, list) {
		count++;
	}

	return count;
}

/*=========================================================================*/
/* urb callback */
static void hdpvr_read_bulk_callback(struct urb *urb)
{
	struct hdpvr_buffer *buf = (struct hdpvr_buffer *)urb->context;
	struct hdpvr_device *dev = buf->dev;

	/* marking buffer as received and wake waiting */
	buf->status = BUFSTAT_READY;
	wake_up_interruptible(&dev->wait_data);
}

/*=========================================================================*/
/* buffer bits */

/* function expects dev->io_mutex to be hold by caller */
int hdpvr_cancel_queue(struct hdpvr_device *dev)
{
	struct hdpvr_buffer *buf;

	list_for_each_entry(buf, &dev->rec_buff_list, buff_list) {
		usb_kill_urb(buf->urb);
		buf->status = BUFSTAT_AVAILABLE;
	}

	list_splice_init(&dev->rec_buff_list, dev->free_buff_list.prev);

	return 0;
}

static int hdpvr_free_queue(struct list_head *q)
{
	struct list_head *tmp;
	struct list_head *p;
	struct hdpvr_buffer *buf;
	struct urb *urb;

	for (p = q->next; p != q;) {
		buf = list_entry(p, struct hdpvr_buffer, buff_list);

		urb = buf->urb;
		usb_free_coherent(urb->dev, urb->transfer_buffer_length,
				  urb->transfer_buffer, urb->transfer_dma);
		usb_free_urb(urb);
		tmp = p->next;
		list_del(p);
		kfree(buf);
		p = tmp;
	}

	return 0;
}

/* function expects dev->io_mutex to be hold by caller */
int hdpvr_free_buffers(struct hdpvr_device *dev)
{
	hdpvr_cancel_queue(dev);

	hdpvr_free_queue(&dev->free_buff_list);
	hdpvr_free_queue(&dev->rec_buff_list);

	return 0;
}

/* function expects dev->io_mutex to be hold by caller */
int hdpvr_alloc_buffers(struct hdpvr_device *dev, uint count)
{
	uint i;
	int retval = -ENOMEM;
	u8 *mem;
	struct hdpvr_buffer *buf;
	struct urb *urb;

	v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
		 "allocating %u buffers\n", count);

	for (i = 0; i < count; i++) {

		buf = kzalloc(sizeof(struct hdpvr_buffer), GFP_KERNEL);
		if (!buf) {
			v4l2_err(&dev->v4l2_dev, "cannot allocate buffer\n");
			goto exit;
		}
		buf->dev = dev;

		urb = usb_alloc_urb(0, GFP_KERNEL);
		if (!urb)
			goto exit_urb;
		buf->urb = urb;

		mem = usb_alloc_coherent(dev->udev, dev->bulk_in_size, GFP_KERNEL,
					 &urb->transfer_dma);
		if (!mem) {
			v4l2_err(&dev->v4l2_dev,
				 "cannot allocate usb transfer buffer\n");
			goto exit_urb_buffer;
		}

		usb_fill_bulk_urb(buf->urb, dev->udev,
				  usb_rcvbulkpipe(dev->udev,
						  dev->bulk_in_endpointAddr),
				  mem, dev->bulk_in_size,
				  hdpvr_read_bulk_callback, buf);

		buf->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
		buf->status = BUFSTAT_AVAILABLE;
		list_add_tail(&buf->buff_list, &dev->free_buff_list);
	}
	return 0;
exit_urb_buffer:
	usb_free_urb(urb);
exit_urb:
	kfree(buf);
exit:
	hdpvr_free_buffers(dev);
	return retval;
}

static int hdpvr_submit_buffers(struct hdpvr_device *dev)
{
	struct hdpvr_buffer *buf;
	struct urb *urb;
	int ret = 0, err_count = 0;

	mutex_lock(&dev->io_mutex);

	while (dev->status == STATUS_STREAMING &&
	       !list_empty(&dev->free_buff_list)) {

		buf = list_entry(dev->free_buff_list.next, struct hdpvr_buffer,
				 buff_list);
		if (buf->status != BUFSTAT_AVAILABLE) {
			v4l2_err(&dev->v4l2_dev,
				 "buffer not marked as available\n");
			ret = -EFAULT;
			goto err;
		}

		urb = buf->urb;
		urb->status = 0;
		urb->actual_length = 0;
		ret = usb_submit_urb(urb, GFP_KERNEL);
		if (ret) {
			v4l2_err(&dev->v4l2_dev,
				 "usb_submit_urb in %s returned %d\n",
				 __func__, ret);
			if (++err_count > 2)
				break;
			continue;
		}
		buf->status = BUFSTAT_INPROGRESS;
		list_move_tail(&buf->buff_list, &dev->rec_buff_list);
	}
err:
	print_buffer_status();
	mutex_unlock(&dev->io_mutex);
	return ret;
}

static struct hdpvr_buffer *hdpvr_get_next_buffer(struct hdpvr_device *dev)
{
	struct hdpvr_buffer *buf;

	mutex_lock(&dev->io_mutex);

	if (list_empty(&dev->rec_buff_list)) {
		mutex_unlock(&dev->io_mutex);
		return NULL;
	}

	buf = list_entry(dev->rec_buff_list.next, struct hdpvr_buffer,
			 buff_list);
	mutex_unlock(&dev->io_mutex);

	return buf;
}

static void hdpvr_transmit_buffers(struct work_struct *work)
{
	struct hdpvr_device *dev = container_of(work, struct hdpvr_device,
						worker);

	while (dev->status == STATUS_STREAMING) {

		if (hdpvr_submit_buffers(dev)) {
			v4l2_err(&dev->v4l2_dev, "couldn't submit buffers\n");
			goto error;
		}
		if (wait_event_interruptible(dev->wait_buffer,
				!list_empty(&dev->free_buff_list) ||
					     dev->status != STATUS_STREAMING))
			goto error;
	}

	v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
		 "transmit worker exited\n");
	return;
error:
	v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
		 "transmit buffers errored\n");
	dev->status = STATUS_ERROR;
}

/* function expects dev->io_mutex to be hold by caller */
static int hdpvr_start_streaming(struct hdpvr_device *dev)
{
	int ret;
	struct hdpvr_video_info vidinf;

	if (dev->status == STATUS_STREAMING)
		return 0;
	if (dev->status != STATUS_IDLE)
		return -EAGAIN;

	ret = get_video_info(dev, &vidinf);
	if (ret < 0)
		return ret;

	if (!vidinf.valid) {
		msleep(250);
		v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
				"no video signal at input %d\n", dev->options.video_input);
		return -EAGAIN;
	}

	v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
			"video signal: %dx%d@%dhz\n", vidinf.width,
			vidinf.height, vidinf.fps);

	/* start streaming 2 request */
	ret = usb_control_msg(dev->udev,
			usb_sndctrlpipe(dev->udev, 0),
			0xb8, 0x38, 0x1, 0, NULL, 0, 8000);
	v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
			"encoder start control request returned %d\n", ret);
	if (ret < 0)
		return ret;

	ret = hdpvr_config_call(dev, CTRL_START_STREAMING_VALUE, 0x00);
	if (ret)
		return ret;

	dev->status = STATUS_STREAMING;

	INIT_WORK(&dev->worker, hdpvr_transmit_buffers);
	schedule_work(&dev->worker);

	v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
			"streaming started\n");

	return 0;
}


/* function expects dev->io_mutex to be hold by caller */
static int hdpvr_stop_streaming(struct hdpvr_device *dev)
{
	int actual_length;
	uint c = 0;
	u8 *buf;

	if (dev->status == STATUS_IDLE)
		return 0;
	else if (dev->status != STATUS_STREAMING)
		return -EAGAIN;

	buf = kmalloc(dev->bulk_in_size, GFP_KERNEL);
	if (!buf)
		v4l2_err(&dev->v4l2_dev, "failed to allocate temporary buffer for emptying the internal device buffer. Next capture start will be slow\n");

	dev->status = STATUS_SHUTTING_DOWN;
	hdpvr_config_call(dev, CTRL_STOP_STREAMING_VALUE, 0x00);
	mutex_unlock(&dev->io_mutex);

	wake_up_interruptible(&dev->wait_buffer);
	msleep(50);

	flush_work(&dev->worker);

	mutex_lock(&dev->io_mutex);
	/* kill the still outstanding urbs */
	hdpvr_cancel_queue(dev);

	/* emptying the device buffer beforeshutting it down */
	while (buf && ++c < 500 &&
	       !usb_bulk_msg(dev->udev,
			     usb_rcvbulkpipe(dev->udev,
					     dev->bulk_in_endpointAddr),
			     buf, dev->bulk_in_size, &actual_length,
			     BULK_URB_TIMEOUT)) {
		v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
			 "%2d: got %d bytes\n", c, actual_length);
	}
	kfree(buf);
	v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
		 "used %d urbs to empty device buffers\n", c-1);
	msleep(10);

	dev->status = STATUS_IDLE;

	return 0;
}


/*=======================================================================*/
/*
 * video 4 linux 2 file operations
 */

static int hdpvr_open(struct file *file)
{
	struct hdpvr_fh *fh = kzalloc(sizeof(*fh), GFP_KERNEL);

	if (fh == NULL)
		return -ENOMEM;
	fh->legacy_mode = true;
	v4l2_fh_init(&fh->fh, video_devdata(file));
	v4l2_fh_add(&fh->fh);
	file->private_data = fh;
	return 0;
}

static int hdpvr_release(struct file *file)
{
	struct hdpvr_device *dev = video_drvdata(file);

	mutex_lock(&dev->io_mutex);
	if (file->private_data == dev->owner) {
		hdpvr_stop_streaming(dev);
		dev->owner = NULL;
	}
	mutex_unlock(&dev->io_mutex);

	return v4l2_fh_release(file);
}

/*
 * hdpvr_v4l2_read()
 * will allocate buffers when called for the first time
 */
static ssize_t hdpvr_read(struct file *file, char __user *buffer, size_t count,
			  loff_t *pos)
{
	struct hdpvr_device *dev = video_drvdata(file);
	struct hdpvr_buffer *buf = NULL;
	struct urb *urb;
	unsigned int ret = 0;
	int rem, cnt;

	if (*pos)
		return -ESPIPE;

	mutex_lock(&dev->io_mutex);
	if (dev->status == STATUS_IDLE) {
		if (hdpvr_start_streaming(dev)) {
			v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
				 "start_streaming failed\n");
			ret = -EIO;
			msleep(200);
			dev->status = STATUS_IDLE;
			mutex_unlock(&dev->io_mutex);
			goto err;
		}
		dev->owner = file->private_data;
		print_buffer_status();
	}
	mutex_unlock(&dev->io_mutex);

	/* wait for the first buffer */
	if (!(file->f_flags & O_NONBLOCK)) {
		if (wait_event_interruptible(dev->wait_data,
					     hdpvr_get_next_buffer(dev)))
			return -ERESTARTSYS;
	}

	buf = hdpvr_get_next_buffer(dev);

	while (count > 0 && buf) {

		if (buf->status != BUFSTAT_READY &&
		    dev->status != STATUS_DISCONNECTED) {
			int err;
			/* return nonblocking */
			if (file->f_flags & O_NONBLOCK) {
				if (!ret)
					ret = -EAGAIN;
				goto err;
			}

			err = wait_event_interruptible_timeout(dev->wait_data,
				buf->status == BUFSTAT_READY,
				msecs_to_jiffies(1000));
			if (err < 0) {
				ret = err;
				goto err;
			}
			if (!err) {
				v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
					"timeout: restart streaming\n");
				hdpvr_stop_streaming(dev);
				msecs_to_jiffies(4000);
				err = hdpvr_start_streaming(dev);
				if (err) {
					ret = err;
					goto err;
				}
			}
		}

		if (buf->status != BUFSTAT_READY)
			break;

		/* set remaining bytes to copy */
		urb = buf->urb;
		rem = urb->actual_length - buf->pos;
		cnt = rem > count ? count : rem;

		if (copy_to_user(buffer, urb->transfer_buffer + buf->pos,
				 cnt)) {
			v4l2_err(&dev->v4l2_dev, "read: copy_to_user failed\n");
			if (!ret)
				ret = -EFAULT;
			goto err;
		}

		buf->pos += cnt;
		count -= cnt;
		buffer += cnt;
		ret += cnt;

		/* finished, take next buffer */
		if (buf->pos == urb->actual_length) {
			mutex_lock(&dev->io_mutex);
			buf->pos = 0;
			buf->status = BUFSTAT_AVAILABLE;

			list_move_tail(&buf->buff_list, &dev->free_buff_list);

			print_buffer_status();

			mutex_unlock(&dev->io_mutex);

			wake_up_interruptible(&dev->wait_buffer);

			buf = hdpvr_get_next_buffer(dev);
		}
	}
err:
	if (!ret && !buf)
		ret = -EAGAIN;
	return ret;
}

static __poll_t hdpvr_poll(struct file *filp, poll_table *wait)
{
	__poll_t req_events = poll_requested_events(wait);
	struct hdpvr_buffer *buf = NULL;
	struct hdpvr_device *dev = video_drvdata(filp);
	__poll_t mask = v4l2_ctrl_poll(filp, wait);

	if (!(req_events & (EPOLLIN | EPOLLRDNORM)))
		return mask;

	mutex_lock(&dev->io_mutex);

	if (dev->status == STATUS_IDLE) {
		if (hdpvr_start_streaming(dev)) {
			v4l2_dbg(MSG_BUFFER, hdpvr_debug, &dev->v4l2_dev,
				 "start_streaming failed\n");
			dev->status = STATUS_IDLE;
		} else {
			dev->owner = filp->private_data;
		}

		print_buffer_status();
	}
	mutex_unlock(&dev->io_mutex);

	buf = hdpvr_get_next_buffer(dev);
	/* only wait if no data is available */
	if (!buf || buf->status != BUFSTAT_READY) {
		poll_wait(filp, &dev->wait_data, wait);
		buf = hdpvr_get_next_buffer(dev);
	}
	if (buf && buf->status == BUFSTAT_READY)
		mask |= EPOLLIN | EPOLLRDNORM;

	return mask;
}


static const struct v4l2_file_operations hdpvr_fops = {
	.owner		= THIS_MODULE,
	.open		= hdpvr_open,
	.release	= hdpvr_release,
	.read		= hdpvr_read,
	.poll		= hdpvr_poll,
	.unlocked_ioctl	= video_ioctl2,
};

/*=======================================================================*/
/*
 * V4L2 ioctl handling
 */

static int vidioc_querycap(struct file *file, void  *priv,
			   struct v4l2_capability *cap)
{
	struct hdpvr_device *dev = video_drvdata(file);

	strcpy(cap->driver, "hdpvr");
	strcpy(cap->card, "Hauppauge HD PVR");
	usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
	cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_AUDIO |
			    V4L2_CAP_READWRITE;
	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
	return 0;
}

static int vidioc_s_std(struct file *file, void *_fh,
			v4l2_std_id std)
{
	struct hdpvr_device *dev = video_drvdata(file);
	struct hdpvr_fh *fh = _fh;
	u8 std_type = 1;

	if (!fh->legacy_mode && dev->options.video_input == HDPVR_COMPONENT)
		return -ENODATA;
	if (dev->status != STATUS_IDLE)
		return -EBUSY;
	if (std & V4L2_STD_525_60)
		std_type = 0;
	dev->cur_std = std;
	dev->width = 720;
	dev->height = std_type ? 576 : 480;

	return hdpvr_config_call(dev, CTRL_VIDEO_STD_TYPE, std_type);
}

static int vidioc_g_std(struct file *file, void *_fh,
			v4l2_std_id *std)
{
	struct hdpvr_device *dev = video_drvdata(file);
	struct hdpvr_fh *fh = _fh;

	if (!fh->legacy_mode && dev->options.video_input == HDPVR_COMPONENT)
		return -ENODATA;
	*std = dev->cur_std;
	return 0;
}

static int vidioc_querystd(struct file *file, void *_fh, v4l2_std_id *a)
{
	struct hdpvr_device *dev = video_drvdata(file);
	struct hdpvr_video_info vid_info;
	struct hdpvr_fh *fh = _fh;
	int ret;

	*a = V4L2_STD_UNKNOWN;
	if (dev->options.video_input == HDPVR_COMPONENT)
		return fh->legacy_mode ? 0 : -ENODATA;
	ret = get_video_info(dev, &vid_info);
	if (vid_info.valid && vid_info.width == 720 &&
	    (vid_info.height == 480 || vid_info.height == 576)) {
		*a = (vid_info.height == 480) ?
			V4L2_STD_525_60 : V4L2_STD_625_50;
	}
	return ret;
}

static int vidioc_s_dv_timings(struct file *file, void *_fh,
				    struct v4l2_dv_timings *timings)
{
	struct hdpvr_device *dev = video_drvdata(file);
	struct hdpvr_fh *fh = _fh;
	int i;

	fh->legacy_mode = false;
	if (dev->options.video_input)
		return -ENODATA;
	if (dev->status != STATUS_IDLE)
		return -EBUSY;
	for (i = 0; i < ARRAY_SIZE(hdpvr_dv_timings); i++)
		if (v4l2_match_dv_timings(timings, hdpvr_dv_timings + i, 0, false))
			break;
	if (i == ARRAY_SIZE(hdpvr_dv_timings))
		return -EINVAL;
	dev->cur_dv_timings = hdpvr_dv_timings[i];
	dev->width = hdpvr_dv_timings[i].bt.width;
	dev->height = hdpvr_dv_timings[i].bt.height;
	return 0;
}

static int vidioc_g_dv_timings(struct file *file, void *_fh,
				    struct v4l2_dv_timings *timings)
{
	struct hdpvr_device *dev = video_drvdata(file);
	struct hdpvr_fh *fh = _fh;

	fh->legacy_mode = false;
	if (dev->options.video_input)
		return -ENODATA;
	*timings = dev->cur_dv_timings;
	return 0;
}

static int vidioc_query_dv_timings(struct file *file, void *_fh,
				    struct v4l2_dv_timings *timings)
{
	struct hdpvr_device *dev = video_drvdata(file);
	struct hdpvr_fh *fh = _fh;
	struct hdpvr_video_info vid_info;
	bool interlaced;
	int ret = 0;
	int i;

	fh->legacy_mode = false;
	if (dev->options.video_input)
		return -ENODATA;
	ret = get_video_info(dev, &vid_info);
	if (ret)
		return ret;
	if (!vid_info.valid)
		return -ENOLCK;
	interlaced = vid_info.fps <= 30;
	for (i = 0; i < ARRAY_SIZE(hdpvr_dv_timings); i++) {
		const struct v4l2_bt_timings *bt = &hdpvr_dv_timings[i].bt;
		unsigned hsize;
		unsigned vsize;
		unsigned fps;

		hsize = V4L2_DV_BT_FRAME_WIDTH(bt);
		vsize = V4L2_DV_BT_FRAME_HEIGHT(bt);
		fps = (unsigned)bt->pixelclock / (hsize * vsize);
		if (bt->width != vid_info.width ||
		    bt->height != vid_info.height ||
		    bt->interlaced != interlaced ||
		    (fps != vid_info.fps && fps + 1 != vid_info.fps))
			continue;
		*timings = hdpvr_dv_timings[i];
		break;
	}
	if (i == ARRAY_SIZE(hdpvr_dv_timings))
		ret = -ERANGE;

	return ret;
}

static int vidioc_enum_dv_timings(struct file *file, void *_fh,
				    struct v4l2_enum_dv_timings *timings)
{
	struct hdpvr_device *dev = video_drvdata(file);
	struct hdpvr_fh *fh = _fh;

	fh->legacy_mode = false;
	memset(timings->reserved, 0, sizeof(timings->reserved));
	if (dev->options.video_input)
		return -ENODATA;
	if (timings->index >= ARRAY_SIZE(hdpvr_dv_timings))
		return -EINVAL;
	timings->timings = hdpvr_dv_timings[timings->index];
	return 0;
}

static int vidioc_dv_timings_cap(struct file *file, void *_fh,
				    struct v4l2_dv_timings_cap *cap)
{
	struct hdpvr_device *dev = video_drvdata(file);
	struct hdpvr_fh *fh = _fh;

	fh->legacy_mode = false;
	if (dev->options.video_input)
		return -ENODATA;
	cap->type = V4L2_DV_BT_656_1120;
	cap->bt.min_width = 720;
	cap->bt.max_width = 1920;
	cap->bt.min_height = 480;
	cap->bt.max_height = 1080;
	cap->bt.min_pixelclock = 27000000;
	cap->bt.max_pixelclock = 74250000;
	cap->bt.standards = V4L2_DV_BT_STD_CEA861;
	cap->bt.capabilities = V4L2_DV_BT_CAP_INTERLACED | V4L2_DV_BT_CAP_PROGRESSIVE;
	return 0;
}

static const char *iname[] = {
	[HDPVR_COMPONENT] = "Component",
	[HDPVR_SVIDEO]    = "S-Video",
	[HDPVR_COMPOSITE] = "Composite",
};

static int vidioc_enum_input(struct file *file, void *_fh, struct v4l2_input *i)
{
	unsigned int n;

	n = i->index;
	if (n >= HDPVR_VIDEO_INPUTS)
		return -EINVAL;

	i->type = V4L2_INPUT_TYPE_CAMERA;

	strncpy(i->name, iname[n], sizeof(i->name) - 1);
	i->name[sizeof(i->name) - 1] = '\0';

	i->audioset = 1<<HDPVR_RCA_FRONT | 1<<HDPVR_RCA_BACK | 1<<HDPVR_SPDIF;

	i->capabilities = n ? V4L2_IN_CAP_STD : V4L2_IN_CAP_DV_TIMINGS;
	i->std = n ? V4L2_STD_ALL : 0;

	return 0;
}

static int vidioc_s_input(struct file *file, void *_fh,
			  unsigned int index)
{
	struct hdpvr_device *dev = video_drvdata(file);
	int retval;

	if (index >= HDPVR_VIDEO_INPUTS)
		return -EINVAL;

	if (dev->status != STATUS_IDLE)
		return -EBUSY;

	retval = hdpvr_config_call(dev, CTRL_VIDEO_INPUT_VALUE, index+1);
	if (!retval) {
		dev->options.video_input = index;
		/*
		 * Unfortunately gstreamer calls ENUMSTD and bails out if it
		 * won't find any formats, even though component input is
		 * selected. This means that we have to leave tvnorms at
		 * V4L2_STD_ALL. We cannot use the 'legacy' trick since
		 * tvnorms is set at the device node level and not at the
		 * filehandle level.
		 *
		 * Comment this out for now, but if the legacy mode can be
		 * removed in the future, then this code should be enabled
		 * again.
		dev->video_dev.tvnorms =
			(index != HDPVR_COMPONENT) ? V4L2_STD_ALL : 0;
		 */
	}

	return retval;
}

static int vidioc_g_input(struct file *file, void *private_data,
			  unsigned int *index)
{
	struct hdpvr_device *dev = video_drvdata(file);

	*index = dev->options.video_input;
	return 0;
}


static const char *audio_iname[] = {
	[HDPVR_RCA_FRONT] = "RCA front",
	[HDPVR_RCA_BACK]  = "RCA back",
	[HDPVR_SPDIF]     = "SPDIF",
};

static int vidioc_enumaudio(struct file *file, void *priv,
				struct v4l2_audio *audio)
{
	unsigned int n;

	n = audio->index;
	if (n >= HDPVR_AUDIO_INPUTS)
		return -EINVAL;

	audio->capability = V4L2_AUDCAP_STEREO;

	strncpy(audio->name, audio_iname[n], sizeof(audio->name) - 1);
	audio->name[sizeof(audio->name) - 1] = '\0';

	return 0;
}

static int vidioc_s_audio(struct file *file, void *private_data,
			  const struct v4l2_audio *audio)
{
	struct hdpvr_device *dev = video_drvdata(file);
	int retval;

	if (audio->index >= HDPVR_AUDIO_INPUTS)
		return -EINVAL;

	if (dev->status != STATUS_IDLE)
		return -EBUSY;

	retval = hdpvr_set_audio(dev, audio->index+1, dev->options.audio_codec);
	if (!retval)
		dev->options.audio_input = audio->index;

	return retval;
}

static int vidioc_g_audio(struct file *file, void *private_data,
			  struct v4l2_audio *audio)
{
	struct hdpvr_device *dev = video_drvdata(file);

	audio->index = dev->options.audio_input;
	audio->capability = V4L2_AUDCAP_STEREO;
	strncpy(audio->name, audio_iname[audio->index], sizeof(audio->name));
	audio->name[sizeof(audio->name) - 1] = '\0';
	return 0;
}

static int hdpvr_try_ctrl(struct v4l2_ctrl *ctrl)
{
	struct hdpvr_device *dev =
		container_of(ctrl->handler, struct hdpvr_device, hdl);

	switch (ctrl->id) {
	case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
		if (ctrl->val == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR &&
		    dev->video_bitrate->val >= dev->video_bitrate_peak->val)
			dev->video_bitrate_peak->val =
					dev->video_bitrate->val + 100000;
		break;
	}
	return 0;
}

static int hdpvr_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct hdpvr_device *dev =
		container_of(ctrl->handler, struct hdpvr_device, hdl);
	struct hdpvr_options *opt = &dev->options;
	int ret = -EINVAL;

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
		ret = hdpvr_config_call(dev, CTRL_BRIGHTNESS, ctrl->val);
		if (ret)
			break;
		dev->options.brightness = ctrl->val;
		return 0;
	case V4L2_CID_CONTRAST:
		ret = hdpvr_config_call(dev, CTRL_CONTRAST, ctrl->val);
		if (ret)
			break;
		dev->options.contrast = ctrl->val;
		return 0;
	case V4L2_CID_SATURATION:
		ret = hdpvr_config_call(dev, CTRL_SATURATION, ctrl->val);
		if (ret)
			break;
		dev->options.saturation = ctrl->val;
		return 0;
	case V4L2_CID_HUE:
		ret = hdpvr_config_call(dev, CTRL_HUE, ctrl->val);
		if (ret)
			break;
		dev->options.hue = ctrl->val;
		return 0;
	case V4L2_CID_SHARPNESS:
		ret = hdpvr_config_call(dev, CTRL_SHARPNESS, ctrl->val);
		if (ret)
			break;
		dev->options.sharpness = ctrl->val;
		return 0;
	case V4L2_CID_MPEG_AUDIO_ENCODING:
		if (dev->flags & HDPVR_FLAG_AC3_CAP) {
			opt->audio_codec = ctrl->val;
			return hdpvr_set_audio(dev, opt->audio_input + 1,
					      opt->audio_codec);
		}
		return 0;
	case V4L2_CID_MPEG_VIDEO_ENCODING:
		return 0;
/*	case V4L2_CID_MPEG_VIDEO_B_FRAMES: */
/*		if (ctrl->value == 0 && !(opt->gop_mode & 0x2)) { */
/*			opt->gop_mode |= 0x2; */
/*			hdpvr_config_call(dev, CTRL_GOP_MODE_VALUE, */
/*					  opt->gop_mode); */
/*		} */
/*		if (ctrl->value == 128 && opt->gop_mode & 0x2) { */
/*			opt->gop_mode &= ~0x2; */
/*			hdpvr_config_call(dev, CTRL_GOP_MODE_VALUE, */
/*					  opt->gop_mode); */
/*		} */
/*		break; */
	case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: {
		uint peak_bitrate = dev->video_bitrate_peak->val / 100000;
		uint bitrate = dev->video_bitrate->val / 100000;

		if (ctrl->is_new) {
			if (ctrl->val == V4L2_MPEG_VIDEO_BITRATE_MODE_CBR)
				opt->bitrate_mode = HDPVR_CONSTANT;
			else
				opt->bitrate_mode = HDPVR_VARIABLE_AVERAGE;
			hdpvr_config_call(dev, CTRL_BITRATE_MODE_VALUE,
					  opt->bitrate_mode);
			v4l2_ctrl_activate(dev->video_bitrate_peak,
				ctrl->val != V4L2_MPEG_VIDEO_BITRATE_MODE_CBR);
		}

		if (dev->video_bitrate_peak->is_new ||
		    dev->video_bitrate->is_new) {
			opt->bitrate = bitrate;
			opt->peak_bitrate = peak_bitrate;
			hdpvr_set_bitrate(dev);
		}
		return 0;
	}
	case V4L2_CID_MPEG_STREAM_TYPE:
		return 0;
	default:
		break;
	}
	return ret;
}

static int vidioc_enum_fmt_vid_cap(struct file *file, void *private_data,
				    struct v4l2_fmtdesc *f)
{
	if (f->index != 0)
		return -EINVAL;

	f->flags = V4L2_FMT_FLAG_COMPRESSED;
	strncpy(f->description, "MPEG2-TS with AVC/AAC streams", 32);
	f->pixelformat = V4L2_PIX_FMT_MPEG;

	return 0;
}

static int vidioc_g_fmt_vid_cap(struct file *file, void *_fh,
				struct v4l2_format *f)
{
	struct hdpvr_device *dev = video_drvdata(file);
	struct hdpvr_fh *fh = _fh;
	int ret;

	/*
	 * The original driver would always returns the current detected
	 * resolution as the format (and EFAULT if it couldn't be detected).
	 * With the introduction of VIDIOC_QUERY_DV_TIMINGS there is now a
	 * better way of doing this, but to stay compatible with existing
	 * applications we assume legacy mode every time an application opens
	 * the device. Only if one of the new DV_TIMINGS ioctls is called
	 * will the filehandle go into 'normal' mode where g_fmt returns the
	 * last set format.
	 */
	if (fh->legacy_mode) {
		struct hdpvr_video_info vid_info;

		ret = get_video_info(dev, &vid_info);
		if (ret < 0)
			return ret;
		if (!vid_info.valid)
			return -EFAULT;
		f->fmt.pix.width = vid_info.width;
		f->fmt.pix.height = vid_info.height;
	} else {
		f->fmt.pix.width = dev->width;
		f->fmt.pix.height = dev->height;
	}
	f->fmt.pix.pixelformat	= V4L2_PIX_FMT_MPEG;
	f->fmt.pix.sizeimage	= dev->bulk_in_size;
	f->fmt.pix.bytesperline	= 0;
	if (f->fmt.pix.width == 720) {
		/* SDTV formats */
		f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
		f->fmt.pix.field = V4L2_FIELD_INTERLACED;
	} else {
		/* HDTV formats */
		f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
		f->fmt.pix.field = V4L2_FIELD_NONE;
	}
	return 0;
}

static int vidioc_encoder_cmd(struct file *filp, void *priv,
			       struct v4l2_encoder_cmd *a)
{
	struct hdpvr_device *dev = video_drvdata(filp);
	int res = 0;

	mutex_lock(&dev->io_mutex);
	a->flags = 0;

	switch (a->cmd) {
	case V4L2_ENC_CMD_START:
		if (dev->owner && filp->private_data != dev->owner) {
			res = -EBUSY;
			break;
		}
		if (dev->status == STATUS_STREAMING)
			break;
		res = hdpvr_start_streaming(dev);
		if (!res)
			dev->owner = filp->private_data;
		else
			dev->status = STATUS_IDLE;
		break;
	case V4L2_ENC_CMD_STOP:
		if (dev->owner && filp->private_data != dev->owner) {
			res = -EBUSY;
			break;
		}
		if (dev->status == STATUS_IDLE)
			break;
		res = hdpvr_stop_streaming(dev);
		if (!res)
			dev->owner = NULL;
		break;
	default:
		v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
			 "Unsupported encoder cmd %d\n", a->cmd);
		res = -EINVAL;
		break;
	}

	mutex_unlock(&dev->io_mutex);
	return res;
}

static int vidioc_try_encoder_cmd(struct file *filp, void *priv,
					struct v4l2_encoder_cmd *a)
{
	a->flags = 0;
	switch (a->cmd) {
	case V4L2_ENC_CMD_START:
	case V4L2_ENC_CMD_STOP:
		return 0;
	default:
		return -EINVAL;
	}
}

static const struct v4l2_ioctl_ops hdpvr_ioctl_ops = {
	.vidioc_querycap	= vidioc_querycap,
	.vidioc_s_std		= vidioc_s_std,
	.vidioc_g_std		= vidioc_g_std,
	.vidioc_querystd	= vidioc_querystd,
	.vidioc_s_dv_timings	= vidioc_s_dv_timings,
	.vidioc_g_dv_timings	= vidioc_g_dv_timings,
	.vidioc_query_dv_timings= vidioc_query_dv_timings,
	.vidioc_enum_dv_timings	= vidioc_enum_dv_timings,
	.vidioc_dv_timings_cap	= vidioc_dv_timings_cap,
	.vidioc_enum_input	= vidioc_enum_input,
	.vidioc_g_input		= vidioc_g_input,
	.vidioc_s_input		= vidioc_s_input,
	.vidioc_enumaudio	= vidioc_enumaudio,
	.vidioc_g_audio		= vidioc_g_audio,
	.vidioc_s_audio		= vidioc_s_audio,
	.vidioc_enum_fmt_vid_cap= vidioc_enum_fmt_vid_cap,
	.vidioc_g_fmt_vid_cap	= vidioc_g_fmt_vid_cap,
	.vidioc_s_fmt_vid_cap	= vidioc_g_fmt_vid_cap,
	.vidioc_try_fmt_vid_cap	= vidioc_g_fmt_vid_cap,
	.vidioc_encoder_cmd	= vidioc_encoder_cmd,
	.vidioc_try_encoder_cmd	= vidioc_try_encoder_cmd,
	.vidioc_log_status	= v4l2_ctrl_log_status,
	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};

static void hdpvr_device_release(struct video_device *vdev)
{
	struct hdpvr_device *dev = video_get_drvdata(vdev);

	hdpvr_delete(dev);
	mutex_lock(&dev->io_mutex);
	flush_work(&dev->worker);
	mutex_unlock(&dev->io_mutex);

	v4l2_device_unregister(&dev->v4l2_dev);
	v4l2_ctrl_handler_free(&dev->hdl);

	/* deregister I2C adapter */
#if IS_ENABLED(CONFIG_I2C)
	mutex_lock(&dev->i2c_mutex);
	i2c_del_adapter(&dev->i2c_adapter);
	mutex_unlock(&dev->i2c_mutex);
#endif /* CONFIG_I2C */

	kfree(dev->usbc_buf);
	kfree(dev);
}

static const struct video_device hdpvr_video_template = {
	.fops			= &hdpvr_fops,
	.release		= hdpvr_device_release,
	.ioctl_ops		= &hdpvr_ioctl_ops,
	.tvnorms		= V4L2_STD_ALL,
};

static const struct v4l2_ctrl_ops hdpvr_ctrl_ops = {
	.try_ctrl = hdpvr_try_ctrl,
	.s_ctrl = hdpvr_s_ctrl,
};

int hdpvr_register_videodev(struct hdpvr_device *dev, struct device *parent,
			    int devnum)
{
	struct v4l2_ctrl_handler *hdl = &dev->hdl;
	bool ac3 = dev->flags & HDPVR_FLAG_AC3_CAP;
	int res;

	dev->cur_std = V4L2_STD_525_60;
	dev->width = 720;
	dev->height = 480;
	dev->cur_dv_timings = hdpvr_dv_timings[HDPVR_DEF_DV_TIMINGS_IDX];
	v4l2_ctrl_handler_init(hdl, 11);
	if (dev->fw_ver > 0x15) {
		v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
			V4L2_CID_BRIGHTNESS, 0x0, 0xff, 1, 0x80);
		v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
			V4L2_CID_CONTRAST, 0x0, 0xff, 1, 0x40);
		v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
			V4L2_CID_SATURATION, 0x0, 0xff, 1, 0x40);
		v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
			V4L2_CID_HUE, 0x0, 0x1e, 1, 0xf);
		v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
			V4L2_CID_SHARPNESS, 0x0, 0xff, 1, 0x80);
	} else {
		v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
			V4L2_CID_BRIGHTNESS, 0x0, 0xff, 1, 0x86);
		v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
			V4L2_CID_CONTRAST, 0x0, 0xff, 1, 0x80);
		v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
			V4L2_CID_SATURATION, 0x0, 0xff, 1, 0x80);
		v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
			V4L2_CID_HUE, 0x0, 0xff, 1, 0x80);
		v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
			V4L2_CID_SHARPNESS, 0x0, 0xff, 1, 0x80);
	}

	v4l2_ctrl_new_std_menu(hdl, &hdpvr_ctrl_ops,
		V4L2_CID_MPEG_STREAM_TYPE,
		V4L2_MPEG_STREAM_TYPE_MPEG2_TS,
		0x1, V4L2_MPEG_STREAM_TYPE_MPEG2_TS);
	v4l2_ctrl_new_std_menu(hdl, &hdpvr_ctrl_ops,
		V4L2_CID_MPEG_AUDIO_ENCODING,
		ac3 ? V4L2_MPEG_AUDIO_ENCODING_AC3 : V4L2_MPEG_AUDIO_ENCODING_AAC,
		0x7, ac3 ? dev->options.audio_codec : V4L2_MPEG_AUDIO_ENCODING_AAC);
	v4l2_ctrl_new_std_menu(hdl, &hdpvr_ctrl_ops,
		V4L2_CID_MPEG_VIDEO_ENCODING,
		V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC, 0x3,
		V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC);

	dev->video_mode = v4l2_ctrl_new_std_menu(hdl, &hdpvr_ctrl_ops,
		V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
		V4L2_MPEG_VIDEO_BITRATE_MODE_CBR, 0,
		V4L2_MPEG_VIDEO_BITRATE_MODE_CBR);

	dev->video_bitrate = v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
		V4L2_CID_MPEG_VIDEO_BITRATE,
		1000000, 13500000, 100000, 6500000);
	dev->video_bitrate_peak = v4l2_ctrl_new_std(hdl, &hdpvr_ctrl_ops,
		V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
		1100000, 20200000, 100000, 9000000);
	dev->v4l2_dev.ctrl_handler = hdl;
	if (hdl->error) {
		res = hdl->error;
		v4l2_err(&dev->v4l2_dev, "Could not register controls\n");
		goto error;
	}
	v4l2_ctrl_cluster(3, &dev->video_mode);
	res = v4l2_ctrl_handler_setup(hdl);
	if (res < 0) {
		v4l2_err(&dev->v4l2_dev, "Could not setup controls\n");
		goto error;
	}

	/* setup and register video device */
	dev->video_dev = hdpvr_video_template;
	strcpy(dev->video_dev.name, "Hauppauge HD PVR");
	dev->video_dev.v4l2_dev = &dev->v4l2_dev;
	video_set_drvdata(&dev->video_dev, dev);

	res = video_register_device(&dev->video_dev, VFL_TYPE_GRABBER, devnum);
	if (res < 0) {
		v4l2_err(&dev->v4l2_dev, "video_device registration failed\n");
		goto error;
	}

	return 0;
error:
	v4l2_ctrl_handler_free(hdl);
	return res;
}

Privacy Policy