summaryrefslogtreecommitdiff
path: root/drivers/media/platform/davinci/vpif_capture.c
blob: fca4dc829f73eeb0eb9a1c191fc6daae940587a9 (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
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
/*
 * Copyright (C) 2009 Texas Instruments Inc
 * Copyright (C) 2014 Lad, Prabhakar <prabhakar.csengg@gmail.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.
 *
 * TODO : add support for VBI & HBI data service
 *	  add static buffer allocation
 */

#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

#include <media/v4l2-fwnode.h>
#include <media/v4l2-ioctl.h>
#include <media/i2c/tvp514x.h>
#include <media/v4l2-mediabus.h>

#include <linux/videodev2.h>

#include "vpif.h"
#include "vpif_capture.h"

MODULE_DESCRIPTION("TI DaVinci VPIF Capture driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(VPIF_CAPTURE_VERSION);

#define vpif_err(fmt, arg...)	v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg)
#define vpif_dbg(level, debug, fmt, arg...)	\
		v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg)

static int debug = 1;

module_param(debug, int, 0644);

MODULE_PARM_DESC(debug, "Debug level 0-1");

#define VPIF_DRIVER_NAME	"vpif_capture"
MODULE_ALIAS("platform:" VPIF_DRIVER_NAME);

/* global variables */
static struct vpif_device vpif_obj = { {NULL} };
static struct device *vpif_dev;
static void vpif_calculate_offsets(struct channel_obj *ch);
static void vpif_config_addr(struct channel_obj *ch, int muxmode);

static u8 channel_first_int[VPIF_NUMBER_OF_OBJECTS][2] = { {1, 1} };

/* Is set to 1 in case of SDTV formats, 2 in case of HDTV formats. */
static int ycmux_mode;

static inline
struct vpif_cap_buffer *to_vpif_buffer(struct vb2_v4l2_buffer *vb)
{
	return container_of(vb, struct vpif_cap_buffer, vb);
}

/**
 * vpif_buffer_prepare :  callback function for buffer prepare
 * @vb: ptr to vb2_buffer
 *
 * This is the callback function for buffer prepare when vb2_qbuf()
 * function is called. The buffer is prepared and user space virtual address
 * or user address is converted into  physical address
 */
static int vpif_buffer_prepare(struct vb2_buffer *vb)
{
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct vb2_queue *q = vb->vb2_queue;
	struct channel_obj *ch = vb2_get_drv_priv(q);
	struct common_obj *common;
	unsigned long addr;

	vpif_dbg(2, debug, "vpif_buffer_prepare\n");

	common = &ch->common[VPIF_VIDEO_INDEX];

	vb2_set_plane_payload(vb, 0, common->fmt.fmt.pix.sizeimage);
	if (vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
		return -EINVAL;

	vbuf->field = common->fmt.fmt.pix.field;

	addr = vb2_dma_contig_plane_dma_addr(vb, 0);
	if (!IS_ALIGNED((addr + common->ytop_off), 8) ||
		!IS_ALIGNED((addr + common->ybtm_off), 8) ||
		!IS_ALIGNED((addr + common->ctop_off), 8) ||
		!IS_ALIGNED((addr + common->cbtm_off), 8)) {
		vpif_dbg(1, debug, "offset is not aligned\n");
		return -EINVAL;
	}

	return 0;
}

/**
 * vpif_buffer_queue_setup : Callback function for buffer setup.
 * @vq: vb2_queue ptr
 * @nbuffers: ptr to number of buffers requested by application
 * @nplanes:: contains number of distinct video planes needed to hold a frame
 * @sizes: contains the size (in bytes) of each plane.
 * @alloc_devs: ptr to allocation context
 *
 * This callback function is called when reqbuf() is called to adjust
 * the buffer count and buffer size
 */
static int vpif_buffer_queue_setup(struct vb2_queue *vq,
				unsigned int *nbuffers, unsigned int *nplanes,
				unsigned int sizes[], struct device *alloc_devs[])
{
	struct channel_obj *ch = vb2_get_drv_priv(vq);
	struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
	unsigned size = common->fmt.fmt.pix.sizeimage;

	vpif_dbg(2, debug, "vpif_buffer_setup\n");

	if (*nplanes) {
		if (sizes[0] < size)
			return -EINVAL;
		size = sizes[0];
	}

	if (vq->num_buffers + *nbuffers < 3)
		*nbuffers = 3 - vq->num_buffers;

	*nplanes = 1;
	sizes[0] = size;

	/* Calculate the offset for Y and C data in the buffer */
	vpif_calculate_offsets(ch);

	return 0;
}

/**
 * vpif_buffer_queue : Callback function to add buffer to DMA queue
 * @vb: ptr to vb2_buffer
 */
static void vpif_buffer_queue(struct vb2_buffer *vb)
{
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
	struct vpif_cap_buffer *buf = to_vpif_buffer(vbuf);
	struct common_obj *common;
	unsigned long flags;

	common = &ch->common[VPIF_VIDEO_INDEX];

	vpif_dbg(2, debug, "vpif_buffer_queue\n");

	spin_lock_irqsave(&common->irqlock, flags);
	/* add the buffer to the DMA queue */
	list_add_tail(&buf->list, &common->dma_queue);
	spin_unlock_irqrestore(&common->irqlock, flags);
}

/**
 * vpif_start_streaming : Starts the DMA engine for streaming
 * @vq: ptr to vb2_buffer
 * @count: number of buffers
 */
static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
{
	struct vpif_capture_config *vpif_config_data =
					vpif_dev->platform_data;
	struct channel_obj *ch = vb2_get_drv_priv(vq);
	struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
	struct vpif_params *vpif = &ch->vpifparams;
	struct vpif_cap_buffer *buf, *tmp;
	unsigned long addr, flags;
	int ret;

	/* Initialize field_id */
	ch->field_id = 0;

	/* configure 1 or 2 channel mode */
	if (vpif_config_data->setup_input_channel_mode) {
		ret = vpif_config_data->
			setup_input_channel_mode(vpif->std_info.ycmux_mode);
		if (ret < 0) {
			vpif_dbg(1, debug, "can't set vpif channel mode\n");
			goto err;
		}
	}

	ret = v4l2_subdev_call(ch->sd, video, s_stream, 1);
	if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
		vpif_dbg(1, debug, "stream on failed in subdev\n");
		goto err;
	}

	/* Call vpif_set_params function to set the parameters and addresses */
	ret = vpif_set_video_params(vpif, ch->channel_id);
	if (ret < 0) {
		vpif_dbg(1, debug, "can't set video params\n");
		goto err;
	}

	ycmux_mode = ret;
	vpif_config_addr(ch, ret);

	/* Get the next frame from the buffer queue */
	spin_lock_irqsave(&common->irqlock, flags);
	common->cur_frm = common->next_frm = list_entry(common->dma_queue.next,
				    struct vpif_cap_buffer, list);
	/* Remove buffer from the buffer queue */
	list_del(&common->cur_frm->list);
	spin_unlock_irqrestore(&common->irqlock, flags);

	addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb.vb2_buf, 0);

	common->set_addr(addr + common->ytop_off,
			 addr + common->ybtm_off,
			 addr + common->ctop_off,
			 addr + common->cbtm_off);

	/**
	 * Set interrupt for both the fields in VPIF Register enable channel in
	 * VPIF register
	 */
	channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
	if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
		channel0_intr_assert();
		channel0_intr_enable(1);
		enable_channel0(1);
	}
	if (VPIF_CHANNEL1_VIDEO == ch->channel_id ||
		ycmux_mode == 2) {
		channel1_intr_assert();
		channel1_intr_enable(1);
		enable_channel1(1);
	}

	return 0;

err:
	spin_lock_irqsave(&common->irqlock, flags);
	list_for_each_entry_safe(buf, tmp, &common->dma_queue, list) {
		list_del(&buf->list);
		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
	}
	spin_unlock_irqrestore(&common->irqlock, flags);

	return ret;
}

/**
 * vpif_stop_streaming : Stop the DMA engine
 * @vq: ptr to vb2_queue
 *
 * This callback stops the DMA engine and any remaining buffers
 * in the DMA queue are released.
 */
static void vpif_stop_streaming(struct vb2_queue *vq)
{
	struct channel_obj *ch = vb2_get_drv_priv(vq);
	struct common_obj *common;
	unsigned long flags;
	int ret;

	common = &ch->common[VPIF_VIDEO_INDEX];

	/* Disable channel as per its device type and channel id */
	if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
		enable_channel0(0);
		channel0_intr_enable(0);
	}
	if (VPIF_CHANNEL1_VIDEO == ch->channel_id ||
		ycmux_mode == 2) {
		enable_channel1(0);
		channel1_intr_enable(0);
	}

	ycmux_mode = 0;

	ret = v4l2_subdev_call(ch->sd, video, s_stream, 0);
	if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV)
		vpif_dbg(1, debug, "stream off failed in subdev\n");

	/* release all active buffers */
	if (common->cur_frm == common->next_frm) {
		vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
				VB2_BUF_STATE_ERROR);
	} else {
		if (common->cur_frm)
			vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
					VB2_BUF_STATE_ERROR);
		if (common->next_frm)
			vb2_buffer_done(&common->next_frm->vb.vb2_buf,
					VB2_BUF_STATE_ERROR);
	}

	spin_lock_irqsave(&common->irqlock, flags);
	while (!list_empty(&common->dma_queue)) {
		common->next_frm = list_entry(common->dma_queue.next,
						struct vpif_cap_buffer, list);
		list_del(&common->next_frm->list);
		vb2_buffer_done(&common->next_frm->vb.vb2_buf,
				VB2_BUF_STATE_ERROR);
	}
	spin_unlock_irqrestore(&common->irqlock, flags);
}

static const struct vb2_ops video_qops = {
	.queue_setup		= vpif_buffer_queue_setup,
	.buf_prepare		= vpif_buffer_prepare,
	.start_streaming	= vpif_start_streaming,
	.stop_streaming		= vpif_stop_streaming,
	.buf_queue		= vpif_buffer_queue,
	.wait_prepare		= vb2_ops_wait_prepare,
	.wait_finish		= vb2_ops_wait_finish,
};

/**
 * vpif_process_buffer_complete: process a completed buffer
 * @common: ptr to common channel object
 *
 * This function time stamp the buffer and mark it as DONE. It also
 * wake up any process waiting on the QUEUE and set the next buffer
 * as current
 */
static void vpif_process_buffer_complete(struct common_obj *common)
{
	common->cur_frm->vb.vb2_buf.timestamp = ktime_get_ns();
	vb2_buffer_done(&common->cur_frm->vb.vb2_buf, VB2_BUF_STATE_DONE);
	/* Make curFrm pointing to nextFrm */
	common->cur_frm = common->next_frm;
}

/**
 * vpif_schedule_next_buffer: set next buffer address for capture
 * @common : ptr to common channel object
 *
 * This function will get next buffer from the dma queue and
 * set the buffer address in the vpif register for capture.
 * the buffer is marked active
 */
static void vpif_schedule_next_buffer(struct common_obj *common)
{
	unsigned long addr = 0;

	spin_lock(&common->irqlock);
	common->next_frm = list_entry(common->dma_queue.next,
				     struct vpif_cap_buffer, list);
	/* Remove that buffer from the buffer queue */
	list_del(&common->next_frm->list);
	spin_unlock(&common->irqlock);
	addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb.vb2_buf, 0);

	/* Set top and bottom field addresses in VPIF registers */
	common->set_addr(addr + common->ytop_off,
			 addr + common->ybtm_off,
			 addr + common->ctop_off,
			 addr + common->cbtm_off);
}

/**
 * vpif_channel_isr : ISR handler for vpif capture
 * @irq: irq number
 * @dev_id: dev_id ptr
 *
 * It changes status of the captured buffer, takes next buffer from the queue
 * and sets its address in VPIF registers
 */
static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
{
	struct vpif_device *dev = &vpif_obj;
	struct common_obj *common;
	struct channel_obj *ch;
	int channel_id;
	int fid = -1, i;

	channel_id = *(int *)(dev_id);
	if (!vpif_intr_status(channel_id))
		return IRQ_NONE;

	ch = dev->dev[channel_id];

	for (i = 0; i < VPIF_NUMBER_OF_OBJECTS; i++) {
		common = &ch->common[i];
		/* skip If streaming is not started in this channel */
		/* Check the field format */
		if (1 == ch->vpifparams.std_info.frm_fmt ||
		    common->fmt.fmt.pix.field == V4L2_FIELD_NONE) {
			/* Progressive mode */
			spin_lock(&common->irqlock);
			if (list_empty(&common->dma_queue)) {
				spin_unlock(&common->irqlock);
				continue;
			}
			spin_unlock(&common->irqlock);

			if (!channel_first_int[i][channel_id])
				vpif_process_buffer_complete(common);

			channel_first_int[i][channel_id] = 0;

			vpif_schedule_next_buffer(common);


			channel_first_int[i][channel_id] = 0;
		} else {
			/**
			 * Interlaced mode. If it is first interrupt, ignore
			 * it
			 */
			if (channel_first_int[i][channel_id]) {
				channel_first_int[i][channel_id] = 0;
				continue;
			}
			if (0 == i) {
				ch->field_id ^= 1;
				/* Get field id from VPIF registers */
				fid = vpif_channel_getfid(ch->channel_id);
				if (fid != ch->field_id) {
					/**
					 * If field id does not match stored
					 * field id, make them in sync
					 */
					if (0 == fid)
						ch->field_id = fid;
					return IRQ_HANDLED;
				}
			}
			/* device field id and local field id are in sync */
			if (0 == fid) {
				/* this is even field */
				if (common->cur_frm == common->next_frm)
					continue;

				/* mark the current buffer as done */
				vpif_process_buffer_complete(common);
			} else if (1 == fid) {
				/* odd field */
				spin_lock(&common->irqlock);
				if (list_empty(&common->dma_queue) ||
				    (common->cur_frm != common->next_frm)) {
					spin_unlock(&common->irqlock);
					continue;
				}
				spin_unlock(&common->irqlock);

				vpif_schedule_next_buffer(common);
			}
		}
	}
	return IRQ_HANDLED;
}

/**
 * vpif_update_std_info() - update standard related info
 * @ch: ptr to channel object
 *
 * For a given standard selected by application, update values
 * in the device data structures
 */
static int vpif_update_std_info(struct channel_obj *ch)
{
	struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
	struct vpif_params *vpifparams = &ch->vpifparams;
	const struct vpif_channel_config_params *config;
	struct vpif_channel_config_params *std_info = &vpifparams->std_info;
	struct video_obj *vid_ch = &ch->video;
	int index;
	struct v4l2_pix_format *pixfmt = &common->fmt.fmt.pix;

	vpif_dbg(2, debug, "vpif_update_std_info\n");

	/*
	 * if called after try_fmt or g_fmt, there will already be a size
	 * so use that by default.
	 */
	if (pixfmt->width && pixfmt->height) {
		if (pixfmt->field == V4L2_FIELD_ANY ||
		    pixfmt->field == V4L2_FIELD_NONE)
			pixfmt->field = V4L2_FIELD_NONE;

		vpifparams->iface.if_type = VPIF_IF_BT656;
		if (pixfmt->pixelformat == V4L2_PIX_FMT_SGRBG10 ||
		    pixfmt->pixelformat == V4L2_PIX_FMT_SBGGR8)
			vpifparams->iface.if_type = VPIF_IF_RAW_BAYER;

		if (pixfmt->pixelformat == V4L2_PIX_FMT_SGRBG10)
			vpifparams->params.data_sz = 1; /* 10 bits/pixel.  */

		/*
		 * For raw formats from camera sensors, we don't need
		 * the std_info from table lookup, so nothing else to do here.
		 */
		if (vpifparams->iface.if_type == VPIF_IF_RAW_BAYER) {
			memset(std_info, 0, sizeof(struct vpif_channel_config_params));
			vpifparams->std_info.capture_format = 1; /* CCD/raw mode */
			return 0;
		}
	}

	for (index = 0; index < vpif_ch_params_count; index++) {
		config = &vpif_ch_params[index];
		if (config->hd_sd == 0) {
			vpif_dbg(2, debug, "SD format\n");
			if (config->stdid & vid_ch->stdid) {
				memcpy(std_info, config, sizeof(*config));
				break;
			}
		} else {
			vpif_dbg(2, debug, "HD format\n");
			if (!memcmp(&config->dv_timings, &vid_ch->dv_timings,
				sizeof(vid_ch->dv_timings))) {
				memcpy(std_info, config, sizeof(*config));
				break;
			}
		}
	}

	/* standard not found */
	if (index == vpif_ch_params_count)
		return -EINVAL;

	common->fmt.fmt.pix.width = std_info->width;
	common->width = std_info->width;
	common->fmt.fmt.pix.height = std_info->height;
	common->height = std_info->height;
	common->fmt.fmt.pix.sizeimage = common->height * common->width * 2;
	common->fmt.fmt.pix.bytesperline = std_info->width;
	vpifparams->video_params.hpitch = std_info->width;
	vpifparams->video_params.storage_mode = std_info->frm_fmt;

	if (vid_ch->stdid)
		common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
	else
		common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_REC709;

	if (ch->vpifparams.std_info.frm_fmt)
		common->fmt.fmt.pix.field = V4L2_FIELD_NONE;
	else
		common->fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;

	if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER)
		common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8;
	else
		common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_NV16;

	common->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;

	return 0;
}

/**
 * vpif_calculate_offsets : This function calculates buffers offsets
 * @ch : ptr to channel object
 *
 * This function calculates buffer offsets for Y and C in the top and
 * bottom field
 */
static void vpif_calculate_offsets(struct channel_obj *ch)
{
	unsigned int hpitch, sizeimage;
	struct video_obj *vid_ch = &(ch->video);
	struct vpif_params *vpifparams = &ch->vpifparams;
	struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
	enum v4l2_field field = common->fmt.fmt.pix.field;

	vpif_dbg(2, debug, "vpif_calculate_offsets\n");

	if (V4L2_FIELD_ANY == field) {
		if (vpifparams->std_info.frm_fmt)
			vid_ch->buf_field = V4L2_FIELD_NONE;
		else
			vid_ch->buf_field = V4L2_FIELD_INTERLACED;
	} else
		vid_ch->buf_field = common->fmt.fmt.pix.field;

	sizeimage = common->fmt.fmt.pix.sizeimage;

	hpitch = common->fmt.fmt.pix.bytesperline;

	if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
	    (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
		/* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
		common->ytop_off = 0;
		common->ybtm_off = hpitch;
		common->ctop_off = sizeimage / 2;
		common->cbtm_off = sizeimage / 2 + hpitch;
	} else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
		/* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
		common->ytop_off = 0;
		common->ybtm_off = sizeimage / 4;
		common->ctop_off = sizeimage / 2;
		common->cbtm_off = common->ctop_off + sizeimage / 4;
	} else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
		/* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
		common->ybtm_off = 0;
		common->ytop_off = sizeimage / 4;
		common->cbtm_off = sizeimage / 2;
		common->ctop_off = common->cbtm_off + sizeimage / 4;
	}
	if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
	    (V4L2_FIELD_INTERLACED == vid_ch->buf_field))
		vpifparams->video_params.storage_mode = 1;
	else
		vpifparams->video_params.storage_mode = 0;

	if (1 == vpifparams->std_info.frm_fmt)
		vpifparams->video_params.hpitch =
		    common->fmt.fmt.pix.bytesperline;
	else {
		if ((field == V4L2_FIELD_ANY)
		    || (field == V4L2_FIELD_INTERLACED))
			vpifparams->video_params.hpitch =
			    common->fmt.fmt.pix.bytesperline * 2;
		else
			vpifparams->video_params.hpitch =
			    common->fmt.fmt.pix.bytesperline;
	}

	ch->vpifparams.video_params.stdid = vpifparams->std_info.stdid;
}

/**
 * vpif_get_default_field() - Get default field type based on interface
 * @iface: ptr to vpif interface
 */
static inline enum v4l2_field vpif_get_default_field(
				struct vpif_interface *iface)
{
	return (iface->if_type == VPIF_IF_RAW_BAYER) ? V4L2_FIELD_NONE :
						V4L2_FIELD_INTERLACED;
}

/**
 * vpif_config_addr() - function to configure buffer address in vpif
 * @ch: channel ptr
 * @muxmode: channel mux mode
 */
static void vpif_config_addr(struct channel_obj *ch, int muxmode)
{
	struct common_obj *common;

	vpif_dbg(2, debug, "vpif_config_addr\n");

	common = &(ch->common[VPIF_VIDEO_INDEX]);

	if (VPIF_CHANNEL1_VIDEO == ch->channel_id)
		common->set_addr = ch1_set_videobuf_addr;
	else if (2 == muxmode)
		common->set_addr = ch0_set_videobuf_addr_yc_nmux;
	else
		common->set_addr = ch0_set_videobuf_addr;
}

/**
 * vpif_input_to_subdev() - Maps input to sub device
 * @vpif_cfg: global config ptr
 * @chan_cfg: channel config ptr
 * @input_index: Given input index from application
 *
 * lookup the sub device information for a given input index.
 * we report all the inputs to application. inputs table also
 * has sub device name for the each input
 */
static int vpif_input_to_subdev(
		struct vpif_capture_config *vpif_cfg,
		struct vpif_capture_chan_config *chan_cfg,
		int input_index)
{
	struct vpif_subdev_info *subdev_info;
	const char *subdev_name;
	int i;

	vpif_dbg(2, debug, "vpif_input_to_subdev\n");

	if (!chan_cfg)
		return -1;
	if (input_index >= chan_cfg->input_count)
		return -1;
	subdev_name = chan_cfg->inputs[input_index].subdev_name;
	if (!subdev_name)
		return -1;

	/* loop through the sub device list to get the sub device info */
	for (i = 0; i < vpif_cfg->subdev_count; i++) {
		subdev_info = &vpif_cfg->subdev_info[i];
		if (subdev_info && !strcmp(subdev_info->name, subdev_name))
			return i;
	}
	return -1;
}

/**
 * vpif_set_input() - Select an input
 * @vpif_cfg: global config ptr
 * @ch: channel
 * @index: Given input index from application
 *
 * Select the given input.
 */
static int vpif_set_input(
		struct vpif_capture_config *vpif_cfg,
		struct channel_obj *ch,
		int index)
{
	struct vpif_capture_chan_config *chan_cfg =
			&vpif_cfg->chan_config[ch->channel_id];
	struct vpif_subdev_info *subdev_info = NULL;
	struct v4l2_subdev *sd = NULL;
	u32 input = 0, output = 0;
	int sd_index;
	int ret;

	sd_index = vpif_input_to_subdev(vpif_cfg, chan_cfg, index);
	if (sd_index >= 0) {
		sd = vpif_obj.sd[sd_index];
		subdev_info = &vpif_cfg->subdev_info[sd_index];
	} else {
		/* no subdevice, no input to setup */
		return 0;
	}

	/* first setup input path from sub device to vpif */
	if (sd && vpif_cfg->setup_input_path) {
		ret = vpif_cfg->setup_input_path(ch->channel_id,
				       subdev_info->name);
		if (ret < 0) {
			vpif_dbg(1, debug, "couldn't setup input path for the" \
			" sub device %s, for input index %d\n",
			subdev_info->name, index);
			return ret;
		}
	}

	if (sd) {
		input = chan_cfg->inputs[index].input_route;
		output = chan_cfg->inputs[index].output_route;
		ret = v4l2_subdev_call(sd, video, s_routing,
				input, output, 0);
		if (ret < 0 && ret != -ENOIOCTLCMD) {
			vpif_dbg(1, debug, "Failed to set input\n");
			return ret;
		}
	}
	ch->input_idx = index;
	ch->sd = sd;
	/* copy interface parameters to vpif */
	ch->vpifparams.iface = chan_cfg->vpif_if;

	/* update tvnorms from the sub device input info */
	ch->video_dev.tvnorms = chan_cfg->inputs[index].input.std;
	return 0;
}

/**
 * vpif_querystd() - querystd handler
 * @file: file ptr
 * @priv: file handle
 * @std_id: ptr to std id
 *
 * This function is called to detect standard at the selected input
 */
static int vpif_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
{
	struct video_device *vdev = video_devdata(file);
	struct channel_obj *ch = video_get_drvdata(vdev);
	int ret;

	vpif_dbg(2, debug, "vpif_querystd\n");

	/* Call querystd function of decoder device */
	ret = v4l2_subdev_call(ch->sd, video, querystd, std_id);

	if (ret == -ENOIOCTLCMD || ret == -ENODEV)
		return -ENODATA;
	if (ret) {
		vpif_dbg(1, debug, "Failed to query standard for sub devices\n");
		return ret;
	}

	return 0;
}

/**
 * vpif_g_std() - get STD handler
 * @file: file ptr
 * @priv: file handle
 * @std: ptr to std id
 */
static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
{
	struct vpif_capture_config *config = vpif_dev->platform_data;
	struct video_device *vdev = video_devdata(file);
	struct channel_obj *ch = video_get_drvdata(vdev);
	struct vpif_capture_chan_config *chan_cfg;
	struct v4l2_input input;

	vpif_dbg(2, debug, "vpif_g_std\n");

	if (!config->chan_config[ch->channel_id].inputs)
		return -ENODATA;

	chan_cfg = &config->chan_config[ch->channel_id];
	input = chan_cfg->inputs[ch->input_idx].input;
	if (input.capabilities != V4L2_IN_CAP_STD)
		return -ENODATA;

	*std = ch->video.stdid;
	return 0;
}

/**
 * vpif_s_std() - set STD handler
 * @file: file ptr
 * @priv: file handle
 * @std_id: ptr to std id
 */
static int vpif_s_std(struct file *file, void *priv, v4l2_std_id std_id)
{
	struct vpif_capture_config *config = vpif_dev->platform_data;
	struct video_device *vdev = video_devdata(file);
	struct channel_obj *ch = video_get_drvdata(vdev);
	struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
	struct vpif_capture_chan_config *chan_cfg;
	struct v4l2_input input;
	int ret;

	vpif_dbg(2, debug, "vpif_s_std\n");

	if (!config->chan_config[ch->channel_id].inputs)
		return -ENODATA;

	chan_cfg = &config->chan_config[ch->channel_id];
	input = chan_cfg->inputs[ch->input_idx].input;
	if (input.capabilities != V4L2_IN_CAP_STD)
		return -ENODATA;

	if (vb2_is_busy(&common->buffer_queue))
		return -EBUSY;

	/* Call encoder subdevice function to set the standard */
	ch->video.stdid = std_id;
	memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));

	/* Get the information about the standard */
	if (vpif_update_std_info(ch)) {
		vpif_err("Error getting the standard info\n");
		return -EINVAL;
	}

	/* set standard in the sub device */
	ret = v4l2_subdev_call(ch->sd, video, s_std, std_id);
	if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
		vpif_dbg(1, debug, "Failed to set standard for sub devices\n");
		return ret;
	}
	return 0;
}

/**
 * vpif_enum_input() - ENUMINPUT handler
 * @file: file ptr
 * @priv: file handle
 * @input: ptr to input structure
 */
static int vpif_enum_input(struct file *file, void *priv,
				struct v4l2_input *input)
{

	struct vpif_capture_config *config = vpif_dev->platform_data;
	struct video_device *vdev = video_devdata(file);
	struct channel_obj *ch = video_get_drvdata(vdev);
	struct vpif_capture_chan_config *chan_cfg;

	chan_cfg = &config->chan_config[ch->channel_id];

	if (input->index >= chan_cfg->input_count)
		return -EINVAL;

	memcpy(input, &chan_cfg->inputs[input->index].input,
		sizeof(*input));
	return 0;
}

/**
 * vpif_g_input() - Get INPUT handler
 * @file: file ptr
 * @priv: file handle
 * @index: ptr to input index
 */
static int vpif_g_input(struct file *file, void *priv, unsigned int *index)
{
	struct video_device *vdev = video_devdata(file);
	struct channel_obj *ch = video_get_drvdata(vdev);

	*index = ch->input_idx;
	return 0;
}

/**
 * vpif_s_input() - Set INPUT handler
 * @file: file ptr
 * @priv: file handle
 * @index: input index
 */
static int vpif_s_input(struct file *file, void *priv, unsigned int index)
{
	struct vpif_capture_config *config = vpif_dev->platform_data;
	struct video_device *vdev = video_devdata(file);
	struct channel_obj *ch = video_get_drvdata(vdev);
	struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
	struct vpif_capture_chan_config *chan_cfg;

	chan_cfg = &config->chan_config[ch->channel_id];

	if (index >= chan_cfg->input_count)
		return -EINVAL;

	if (vb2_is_busy(&common->buffer_queue))
		return -EBUSY;

	return vpif_set_input(config, ch, index);
}

/**
 * vpif_enum_fmt_vid_cap() - ENUM_FMT handler
 * @file: file ptr
 * @priv: file handle
 * @fmt: ptr to V4L2 format descriptor
 */
static int vpif_enum_fmt_vid_cap(struct file *file, void  *priv,
					struct v4l2_fmtdesc *fmt)
{
	struct video_device *vdev = video_devdata(file);
	struct channel_obj *ch = video_get_drvdata(vdev);

	if (fmt->index != 0) {
		vpif_dbg(1, debug, "Invalid format index\n");
		return -EINVAL;
	}

	/* Fill in the information about format */
	if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER) {
		fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
		strcpy(fmt->description, "Raw Mode -Bayer Pattern GrRBGb");
		fmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
	} else {
		fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
		strcpy(fmt->description, "YCbCr4:2:2 Semi-Planar");
		fmt->pixelformat = V4L2_PIX_FMT_NV16;
	}
	return 0;
}

/**
 * vpif_try_fmt_vid_cap() - TRY_FMT handler
 * @file: file ptr
 * @priv: file handle
 * @fmt: ptr to v4l2 format structure
 */
static int vpif_try_fmt_vid_cap(struct file *file, void *priv,
				struct v4l2_format *fmt)
{
	struct video_device *vdev = video_devdata(file);
	struct channel_obj *ch = video_get_drvdata(vdev);
	struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
	struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);

	common->fmt = *fmt;
	vpif_update_std_info(ch);

	pixfmt->field = common->fmt.fmt.pix.field;
	pixfmt->colorspace = common->fmt.fmt.pix.colorspace;
	pixfmt->bytesperline = common->fmt.fmt.pix.width;
	pixfmt->width = common->fmt.fmt.pix.width;
	pixfmt->height = common->fmt.fmt.pix.height;
	pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height * 2;
	if (pixfmt->pixelformat == V4L2_PIX_FMT_SGRBG10) {
		pixfmt->bytesperline = common->fmt.fmt.pix.width * 2;
		pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
	}
	pixfmt->priv = 0;

	dev_dbg(vpif_dev, "%s: %d x %d; pitch=%d pixelformat=0x%08x, field=%d, size=%d\n", __func__,
		pixfmt->width, pixfmt->height,
		pixfmt->bytesperline, pixfmt->pixelformat,
		pixfmt->field, pixfmt->sizeimage);

	return 0;
}


/**
 * vpif_g_fmt_vid_cap() - Set INPUT handler
 * @file: file ptr
 * @priv: file handle
 * @fmt: ptr to v4l2 format structure
 */
static int vpif_g_fmt_vid_cap(struct file *file, void *priv,
				struct v4l2_format *fmt)
{
	struct video_device *vdev = video_devdata(file);
	struct channel_obj *ch = video_get_drvdata(vdev);
	struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
	struct v4l2_pix_format *pix_fmt = &fmt->fmt.pix;
	struct v4l2_subdev_format format = {
		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
	};
	struct v4l2_mbus_framefmt *mbus_fmt = &format.format;
	int ret;

	/* Check the validity of the buffer type */
	if (common->fmt.type != fmt->type)
		return -EINVAL;

	/* By default, use currently set fmt */
	*fmt = common->fmt;

	/* If subdev has get_fmt, use that to override */
	ret = v4l2_subdev_call(ch->sd, pad, get_fmt, NULL, &format);
	if (!ret && mbus_fmt->code) {
		v4l2_fill_pix_format(pix_fmt, mbus_fmt);
		pix_fmt->bytesperline = pix_fmt->width;
		if (mbus_fmt->code == MEDIA_BUS_FMT_SGRBG10_1X10) {
			/* e.g. mt9v032 */
			pix_fmt->pixelformat = V4L2_PIX_FMT_SGRBG10;
			pix_fmt->bytesperline = pix_fmt->width * 2;
		} else if (mbus_fmt->code == MEDIA_BUS_FMT_UYVY8_2X8) {
			/* e.g. tvp514x */
			pix_fmt->pixelformat = V4L2_PIX_FMT_NV16;
			pix_fmt->bytesperline = pix_fmt->width * 2;
		} else {
			dev_warn(vpif_dev, "%s: Unhandled media-bus format 0x%x\n",
				 __func__, mbus_fmt->code);
		}
		pix_fmt->sizeimage = pix_fmt->bytesperline * pix_fmt->height;
		dev_dbg(vpif_dev, "%s: %d x %d; pitch=%d, pixelformat=0x%08x, code=0x%x, field=%d, size=%d\n", __func__,
			pix_fmt->width, pix_fmt->height,
			pix_fmt->bytesperline, pix_fmt->pixelformat,
			mbus_fmt->code, pix_fmt->field, pix_fmt->sizeimage);

		common->fmt = *fmt;
		vpif_update_std_info(ch);
	}

	return 0;
}

/**
 * vpif_s_fmt_vid_cap() - Set FMT handler
 * @file: file ptr
 * @priv: file handle
 * @fmt: ptr to v4l2 format structure
 */
static int vpif_s_fmt_vid_cap(struct file *file, void *priv,
				struct v4l2_format *fmt)
{
	struct video_device *vdev = video_devdata(file);
	struct channel_obj *ch = video_get_drvdata(vdev);
	struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
	int ret;

	vpif_dbg(2, debug, "%s\n", __func__);

	if (vb2_is_busy(&common->buffer_queue))
		return -EBUSY;

	ret = vpif_try_fmt_vid_cap(file, priv, fmt);
	if (ret)
		return ret;

	/* store the format in the channel object */
	common->fmt = *fmt;
	return 0;
}

/**
 * vpif_querycap() - QUERYCAP handler
 * @file: file ptr
 * @priv: file handle
 * @cap: ptr to v4l2_capability structure
 */
static int vpif_querycap(struct file *file, void  *priv,
				struct v4l2_capability *cap)
{
	struct vpif_capture_config *config = vpif_dev->platform_data;

	cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
	strlcpy(cap->driver, VPIF_DRIVER_NAME, sizeof(cap->driver));
	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
		 dev_name(vpif_dev));
	strlcpy(cap->card, config->card_name, sizeof(cap->card));

	return 0;
}

/**
 * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
 * @file: file ptr
 * @priv: file handle
 * @timings: input timings
 */
static int
vpif_enum_dv_timings(struct file *file, void *priv,
		     struct v4l2_enum_dv_timings *timings)
{
	struct vpif_capture_config *config = vpif_dev->platform_data;
	struct video_device *vdev = video_devdata(file);
	struct channel_obj *ch = video_get_drvdata(vdev);
	struct vpif_capture_chan_config *chan_cfg;
	struct v4l2_input input;
	int ret;

	if (!config->chan_config[ch->channel_id].inputs)
		return -ENODATA;

	chan_cfg = &config->chan_config[ch->channel_id];
	input = chan_cfg->inputs[ch->input_idx].input;
	if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
		return -ENODATA;

	timings->pad = 0;

	ret = v4l2_subdev_call(ch->sd, pad, enum_dv_timings, timings);
	if (ret == -ENOIOCTLCMD || ret == -ENODEV)
		return -EINVAL;

	return ret;
}

/**
 * vpif_query_dv_timings() - QUERY_DV_TIMINGS handler
 * @file: file ptr
 * @priv: file handle
 * @timings: input timings
 */
static int
vpif_query_dv_timings(struct file *file, void *priv,
		      struct v4l2_dv_timings *timings)
{
	struct vpif_capture_config *config = vpif_dev->platform_data;
	struct video_device *vdev = video_devdata(file);
	struct channel_obj *ch = video_get_drvdata(vdev);
	struct vpif_capture_chan_config *chan_cfg;
	struct v4l2_input input;
	int ret;

	if (!config->chan_config[ch->channel_id].inputs)
		return -ENODATA;

	chan_cfg = &config->chan_config[ch->channel_id];
	input = chan_cfg->inputs[ch->input_idx].input;
	if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
		return -ENODATA;

	ret = v4l2_subdev_call(ch->sd, video, query_dv_timings, timings);
	if (ret == -ENOIOCTLCMD || ret == -ENODEV)
		return -ENODATA;

	return ret;
}

/**
 * vpif_s_dv_timings() - S_DV_TIMINGS handler
 * @file: file ptr
 * @priv: file handle
 * @timings: digital video timings
 */
static int vpif_s_dv_timings(struct file *file, void *priv,
		struct v4l2_dv_timings *timings)
{
	struct vpif_capture_config *config = vpif_dev->platform_data;
	struct video_device *vdev = video_devdata(file);
	struct channel_obj *ch = video_get_drvdata(vdev);
	struct vpif_params *vpifparams = &ch->vpifparams;
	struct vpif_channel_config_params *std_info = &vpifparams->std_info;
	struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
	struct video_obj *vid_ch = &ch->video;
	struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
	struct vpif_capture_chan_config *chan_cfg;
	struct v4l2_input input;
	int ret;

	if (!config->chan_config[ch->channel_id].inputs)
		return -ENODATA;

	chan_cfg = &config->chan_config[ch->channel_id];
	input = chan_cfg->inputs[ch->input_idx].input;
	if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
		return -ENODATA;

	if (timings->type != V4L2_DV_BT_656_1120) {
		vpif_dbg(2, debug, "Timing type not defined\n");
		return -EINVAL;
	}

	if (vb2_is_busy(&common->buffer_queue))
		return -EBUSY;

	/* Configure subdevice timings, if any */
	ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
	if (ret == -ENOIOCTLCMD || ret == -ENODEV)
		ret = 0;
	if (ret < 0) {
		vpif_dbg(2, debug, "Error setting custom DV timings\n");
		return ret;
	}

	if (!(timings->bt.width && timings->bt.height &&
				(timings->bt.hbackporch ||
				 timings->bt.hfrontporch ||
				 timings->bt.hsync) &&
				timings->bt.vfrontporch &&
				(timings->bt.vbackporch ||
				 timings->bt.vsync))) {
		vpif_dbg(2, debug, "Timings for width, height, horizontal back porch, horizontal sync, horizontal front porch, vertical back porch, vertical sync and vertical back porch must be defined\n");
		return -EINVAL;
	}

	vid_ch->dv_timings = *timings;

	/* Configure video port timings */

	std_info->eav2sav = V4L2_DV_BT_BLANKING_WIDTH(bt) - 8;
	std_info->sav2eav = bt->width;

	std_info->l1 = 1;
	std_info->l3 = bt->vsync + bt->vbackporch + 1;

	std_info->vsize = V4L2_DV_BT_FRAME_HEIGHT(bt);
	if (bt->interlaced) {
		if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
			std_info->l5 = std_info->vsize/2 -
				(bt->vfrontporch - 1);
			std_info->l7 = std_info->vsize/2 + 1;
			std_info->l9 = std_info->l7 + bt->il_vsync +
				bt->il_vbackporch + 1;
			std_info->l11 = std_info->vsize -
				(bt->il_vfrontporch - 1);
		} else {
			vpif_dbg(2, debug, "Required timing values for interlaced BT format missing\n");
			return -EINVAL;
		}
	} else {
		std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
	}
	strncpy(std_info->name, "Custom timings BT656/1120", VPIF_MAX_NAME);
	std_info->width = bt->width;
	std_info->height = bt->height;
	std_info->frm_fmt = bt->interlaced ? 0 : 1;
	std_info->ycmux_mode = 0;
	std_info->capture_format = 0;
	std_info->vbi_supported = 0;
	std_info->hd_sd = 1;
	std_info->stdid = 0;

	vid_ch->stdid = 0;
	return 0;
}

/**
 * vpif_g_dv_timings() - G_DV_TIMINGS handler
 * @file: file ptr
 * @priv: file handle
 * @timings: digital video timings
 */
static int vpif_g_dv_timings(struct file *file, void *priv,
		struct v4l2_dv_timings *timings)
{
	struct vpif_capture_config *config = vpif_dev->platform_data;
	struct video_device *vdev = video_devdata(file);
	struct channel_obj *ch = video_get_drvdata(vdev);
	struct video_obj *vid_ch = &ch->video;
	struct vpif_capture_chan_config *chan_cfg;
	struct v4l2_input input;

	if (!config->chan_config[ch->channel_id].inputs)
		return -ENODATA;

	chan_cfg = &config->chan_config[ch->channel_id];
	input = chan_cfg->inputs[ch->input_idx].input;
	if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
		return -ENODATA;

	*timings = vid_ch->dv_timings;

	return 0;
}

/*
 * vpif_log_status() - Status information
 * @file: file ptr
 * @priv: file handle
 *
 * Returns zero.
 */
static int vpif_log_status(struct file *filep, void *priv)
{
	/* status for sub devices */
	v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);

	return 0;
}

/* vpif capture ioctl operations */
static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
	.vidioc_querycap		= vpif_querycap,
	.vidioc_enum_fmt_vid_cap	= vpif_enum_fmt_vid_cap,
	.vidioc_g_fmt_vid_cap		= vpif_g_fmt_vid_cap,
	.vidioc_s_fmt_vid_cap		= vpif_s_fmt_vid_cap,
	.vidioc_try_fmt_vid_cap		= vpif_try_fmt_vid_cap,

	.vidioc_enum_input		= vpif_enum_input,
	.vidioc_s_input			= vpif_s_input,
	.vidioc_g_input			= vpif_g_input,

	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
	.vidioc_create_bufs		= vb2_ioctl_create_bufs,
	.vidioc_querybuf		= vb2_ioctl_querybuf,
	.vidioc_qbuf			= vb2_ioctl_qbuf,
	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
	.vidioc_expbuf			= vb2_ioctl_expbuf,
	.vidioc_streamon		= vb2_ioctl_streamon,
	.vidioc_streamoff		= vb2_ioctl_streamoff,

	.vidioc_querystd		= vpif_querystd,
	.vidioc_s_std			= vpif_s_std,
	.vidioc_g_std			= vpif_g_std,

	.vidioc_enum_dv_timings		= vpif_enum_dv_timings,
	.vidioc_query_dv_timings	= vpif_query_dv_timings,
	.vidioc_s_dv_timings		= vpif_s_dv_timings,
	.vidioc_g_dv_timings		= vpif_g_dv_timings,

	.vidioc_log_status		= vpif_log_status,
};

/* vpif file operations */
static const struct v4l2_file_operations vpif_fops = {
	.owner = THIS_MODULE,
	.open = v4l2_fh_open,
	.release = vb2_fop_release,
	.unlocked_ioctl = video_ioctl2,
	.mmap = vb2_fop_mmap,
	.poll = vb2_fop_poll
};

/**
 * initialize_vpif() - Initialize vpif data structures
 *
 * Allocate memory for data structures and initialize them
 */
static int initialize_vpif(void)
{
	int err, i, j;
	int free_channel_objects_index;

	/* Allocate memory for six channel objects */
	for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
		vpif_obj.dev[i] =
		    kzalloc(sizeof(*vpif_obj.dev[i]), GFP_KERNEL);
		/* If memory allocation fails, return error */
		if (!vpif_obj.dev[i]) {
			free_channel_objects_index = i;
			err = -ENOMEM;
			goto vpif_init_free_channel_objects;
		}
	}
	return 0;

vpif_init_free_channel_objects:
	for (j = 0; j < free_channel_objects_index; j++)
		kfree(vpif_obj.dev[j]);
	return err;
}

static int vpif_async_bound(struct v4l2_async_notifier *notifier,
			    struct v4l2_subdev *subdev,
			    struct v4l2_async_subdev *asd)
{
	int i;

	for (i = 0; i < vpif_obj.config->asd_sizes[0]; i++) {
		struct v4l2_async_subdev *_asd = vpif_obj.config->asd[i];
		const struct fwnode_handle *fwnode = _asd->match.fwnode.fwnode;

		if (fwnode == subdev->fwnode) {
			vpif_obj.sd[i] = subdev;
			vpif_obj.config->chan_config->inputs[i].subdev_name =
				(char *)to_of_node(subdev->fwnode)->full_name;
			vpif_dbg(2, debug,
				 "%s: setting input %d subdev_name = %pOF\n",
				 __func__, i,
				 to_of_node(subdev->fwnode));
			return 0;
		}
	}

	for (i = 0; i < vpif_obj.config->subdev_count; i++)
		if (!strcmp(vpif_obj.config->subdev_info[i].name,
			    subdev->name)) {
			vpif_obj.sd[i] = subdev;
			return 0;
		}

	return -EINVAL;
}

static int vpif_probe_complete(void)
{
	struct common_obj *common;
	struct video_device *vdev;
	struct channel_obj *ch;
	struct vb2_queue *q;
	int j, err, k;

	for (j = 0; j < VPIF_CAPTURE_MAX_DEVICES; j++) {
		ch = vpif_obj.dev[j];
		ch->channel_id = j;
		common = &(ch->common[VPIF_VIDEO_INDEX]);
		spin_lock_init(&common->irqlock);
		mutex_init(&common->lock);

		/* select input 0 */
		err = vpif_set_input(vpif_obj.config, ch, 0);
		if (err)
			goto probe_out;

		/* set initial format */
		ch->video.stdid = V4L2_STD_525_60;
		memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
		common->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
		vpif_update_std_info(ch);

		/* Initialize vb2 queue */
		q = &common->buffer_queue;
		q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
		q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
		q->drv_priv = ch;
		q->ops = &video_qops;
		q->mem_ops = &vb2_dma_contig_memops;
		q->buf_struct_size = sizeof(struct vpif_cap_buffer);
		q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
		q->min_buffers_needed = 1;
		q->lock = &common->lock;
		q->dev = vpif_dev;

		err = vb2_queue_init(q);
		if (err) {
			vpif_err("vpif_capture: vb2_queue_init() failed\n");
			goto probe_out;
		}

		INIT_LIST_HEAD(&common->dma_queue);

		/* Initialize the video_device structure */
		vdev = &ch->video_dev;
		strlcpy(vdev->name, VPIF_DRIVER_NAME, sizeof(vdev->name));
		vdev->release = video_device_release_empty;
		vdev->fops = &vpif_fops;
		vdev->ioctl_ops = &vpif_ioctl_ops;
		vdev->v4l2_dev = &vpif_obj.v4l2_dev;
		vdev->vfl_dir = VFL_DIR_RX;
		vdev->queue = q;
		vdev->lock = &common->lock;
		video_set_drvdata(&ch->video_dev, ch);
		err = video_register_device(vdev,
					    VFL_TYPE_GRABBER, (j ? 1 : 0));
		if (err)
			goto probe_out;
	}

	v4l2_info(&vpif_obj.v4l2_dev, "VPIF capture driver initialized\n");
	return 0;

probe_out:
	for (k = 0; k < j; k++) {
		/* Get the pointer to the channel object */
		ch = vpif_obj.dev[k];
		common = &ch->common[k];
		/* Unregister video device */
		video_unregister_device(&ch->video_dev);
	}
	kfree(vpif_obj.sd);
	v4l2_device_unregister(&vpif_obj.v4l2_dev);

	return err;
}

static int vpif_async_complete(struct v4l2_async_notifier *notifier)
{
	return vpif_probe_complete();
}

static const struct v4l2_async_notifier_operations vpif_async_ops = {
	.bound = vpif_async_bound,
	.complete = vpif_async_complete,
};

static struct vpif_capture_config *
vpif_capture_get_pdata(struct platform_device *pdev)
{
	struct device_node *endpoint = NULL;
	struct v4l2_fwnode_endpoint bus_cfg;
	struct vpif_capture_config *pdata;
	struct vpif_subdev_info *sdinfo;
	struct vpif_capture_chan_config *chan;
	unsigned int i;

	/*
	 * DT boot: OF node from parent device contains
	 * video ports & endpoints data.
	 */
	if (pdev->dev.parent && pdev->dev.parent->of_node)
		pdev->dev.of_node = pdev->dev.parent->of_node;
	if (!IS_ENABLED(CONFIG_OF) || !pdev->dev.of_node)
		return pdev->dev.platform_data;

	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return NULL;
	pdata->subdev_info =
		devm_kzalloc(&pdev->dev, sizeof(*pdata->subdev_info) *
			     VPIF_CAPTURE_NUM_CHANNELS, GFP_KERNEL);

	if (!pdata->subdev_info)
		return NULL;

	for (i = 0; i < VPIF_CAPTURE_NUM_CHANNELS; i++) {
		struct device_node *rem;
		unsigned int flags;
		int err;

		endpoint = of_graph_get_next_endpoint(pdev->dev.of_node,
						      endpoint);
		if (!endpoint)
			break;

		sdinfo = &pdata->subdev_info[i];
		chan = &pdata->chan_config[i];
		chan->inputs = devm_kzalloc(&pdev->dev,
					    sizeof(*chan->inputs) *
					    VPIF_CAPTURE_NUM_CHANNELS,
					    GFP_KERNEL);

		chan->input_count++;
		chan->inputs[i].input.type = V4L2_INPUT_TYPE_CAMERA;
		chan->inputs[i].input.std = V4L2_STD_ALL;
		chan->inputs[i].input.capabilities = V4L2_IN_CAP_STD;

		err = v4l2_fwnode_endpoint_parse(of_fwnode_handle(endpoint),
						 &bus_cfg);
		if (err) {
			dev_err(&pdev->dev, "Could not parse the endpoint\n");
			goto done;
		}
		dev_dbg(&pdev->dev, "Endpoint %pOF, bus_width = %d\n",
			endpoint, bus_cfg.bus.parallel.bus_width);
		flags = bus_cfg.bus.parallel.flags;

		if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
			chan->vpif_if.hd_pol = 1;

		if (flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
			chan->vpif_if.vd_pol = 1;

		rem = of_graph_get_remote_port_parent(endpoint);
		if (!rem) {
			dev_dbg(&pdev->dev, "Remote device at %pOF not found\n",
				endpoint);
			goto done;
		}

		dev_dbg(&pdev->dev, "Remote device %s, %pOF found\n",
			rem->name, rem);
		sdinfo->name = rem->full_name;

		pdata->asd[i] = devm_kzalloc(&pdev->dev,
					     sizeof(struct v4l2_async_subdev),
					     GFP_KERNEL);
		if (!pdata->asd[i]) {
			of_node_put(rem);
			pdata = NULL;
			goto done;
		}

		pdata->asd[i]->match_type = V4L2_ASYNC_MATCH_FWNODE;
		pdata->asd[i]->match.fwnode.fwnode = of_fwnode_handle(rem);
		of_node_put(rem);
	}

done:
	if (pdata) {
		pdata->asd_sizes[0] = i;
		pdata->subdev_count = i;
		pdata->card_name = "DA850/OMAP-L138 Video Capture";
	}

	return pdata;
}

/**
 * vpif_probe : This function probes the vpif capture driver
 * @pdev: platform device pointer
 *
 * This creates device entries by register itself to the V4L2 driver and
 * initializes fields of each channel objects
 */
static __init int vpif_probe(struct platform_device *pdev)
{
	struct vpif_subdev_info *subdevdata;
	struct i2c_adapter *i2c_adap;
	struct resource *res;
	int subdev_count;
	int res_idx = 0;
	int i, err;

	pdev->dev.platform_data = vpif_capture_get_pdata(pdev);
	if (!pdev->dev.platform_data) {
		dev_warn(&pdev->dev, "Missing platform data.  Giving up.\n");
		return -EINVAL;
	}

	if (!pdev->dev.platform_data) {
		dev_warn(&pdev->dev, "Missing platform data.  Giving up.\n");
		return -EINVAL;
	}

	vpif_dev = &pdev->dev;

	err = initialize_vpif();
	if (err) {
		v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
		return err;
	}

	err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
	if (err) {
		v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
		return err;
	}

	while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
		err = devm_request_irq(&pdev->dev, res->start, vpif_channel_isr,
					IRQF_SHARED, VPIF_DRIVER_NAME,
					(void *)(&vpif_obj.dev[res_idx]->
					channel_id));
		if (err) {
			err = -EINVAL;
			goto vpif_unregister;
		}
		res_idx++;
	}

	vpif_obj.config = pdev->dev.platform_data;

	subdev_count = vpif_obj.config->subdev_count;
	vpif_obj.sd = kcalloc(subdev_count, sizeof(*vpif_obj.sd), GFP_KERNEL);
	if (!vpif_obj.sd) {
		err = -ENOMEM;
		goto vpif_unregister;
	}

	if (!vpif_obj.config->asd_sizes[0]) {
		int i2c_id = vpif_obj.config->i2c_adapter_id;

		i2c_adap = i2c_get_adapter(i2c_id);
		WARN_ON(!i2c_adap);
		for (i = 0; i < subdev_count; i++) {
			subdevdata = &vpif_obj.config->subdev_info[i];
			vpif_obj.sd[i] =
				v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
							  i2c_adap,
							  &subdevdata->
							  board_info,
							  NULL);

			if (!vpif_obj.sd[i]) {
				vpif_err("Error registering v4l2 subdevice\n");
				err = -ENODEV;
				goto probe_subdev_out;
			}
			v4l2_info(&vpif_obj.v4l2_dev,
				  "registered sub device %s\n",
				   subdevdata->name);
		}
		vpif_probe_complete();
	} else {
		vpif_obj.notifier.subdevs = vpif_obj.config->asd;
		vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0];
		vpif_obj.notifier.ops = &vpif_async_ops;
		err = v4l2_async_notifier_register(&vpif_obj.v4l2_dev,
						   &vpif_obj.notifier);
		if (err) {
			vpif_err("Error registering async notifier\n");
			err = -EINVAL;
			goto probe_subdev_out;
		}
	}

	return 0;

probe_subdev_out:
	/* free sub devices memory */
	kfree(vpif_obj.sd);
vpif_unregister:
	v4l2_device_unregister(&vpif_obj.v4l2_dev);

	return err;
}

/**
 * vpif_remove() - driver remove handler
 * @device: ptr to platform device structure
 *
 * The vidoe device is unregistered
 */
static int vpif_remove(struct platform_device *device)
{
	struct channel_obj *ch;
	int i;

	v4l2_device_unregister(&vpif_obj.v4l2_dev);

	kfree(vpif_obj.sd);
	/* un-register device */
	for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
		/* Get the pointer to the channel object */
		ch = vpif_obj.dev[i];
		/* Unregister video device */
		video_unregister_device(&ch->video_dev);
		kfree(vpif_obj.dev[i]);
	}
	return 0;
}

#ifdef CONFIG_PM_SLEEP
/**
 * vpif_suspend: vpif device suspend
 * @dev: pointer to &struct device
 */
static int vpif_suspend(struct device *dev)
{

	struct common_obj *common;
	struct channel_obj *ch;
	int i;

	for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
		/* Get the pointer to the channel object */
		ch = vpif_obj.dev[i];
		common = &ch->common[VPIF_VIDEO_INDEX];

		if (!vb2_start_streaming_called(&common->buffer_queue))
			continue;

		mutex_lock(&common->lock);
		/* Disable channel */
		if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
			enable_channel0(0);
			channel0_intr_enable(0);
		}
		if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
			ycmux_mode == 2) {
			enable_channel1(0);
			channel1_intr_enable(0);
		}
		mutex_unlock(&common->lock);
	}

	return 0;
}

/*
 * vpif_resume: vpif device suspend
 */
static int vpif_resume(struct device *dev)
{
	struct common_obj *common;
	struct channel_obj *ch;
	int i;

	for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
		/* Get the pointer to the channel object */
		ch = vpif_obj.dev[i];
		common = &ch->common[VPIF_VIDEO_INDEX];

		if (!vb2_start_streaming_called(&common->buffer_queue))
			continue;

		mutex_lock(&common->lock);
		/* Enable channel */
		if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
			enable_channel0(1);
			channel0_intr_enable(1);
		}
		if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
			ycmux_mode == 2) {
			enable_channel1(1);
			channel1_intr_enable(1);
		}
		mutex_unlock(&common->lock);
	}

	return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(vpif_pm_ops, vpif_suspend, vpif_resume);

static __refdata struct platform_driver vpif_driver = {
	.driver	= {
		.name	= VPIF_DRIVER_NAME,
		.pm	= &vpif_pm_ops,
	},
	.probe = vpif_probe,
	.remove = vpif_remove,
};

module_platform_driver(vpif_driver);