summaryrefslogtreecommitdiff
path: root/drivers/media/v4l2-core/v4l2-ioctl.c
blob: a4b5d360fc969067cfa1f8d996fb364715a7c14d (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
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
/*
 * Video capture interface for Linux version 2
 *
 * A generic framework to process V4L2 ioctl commands.
 *
 * 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.
 *
 * Authors:	Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
 *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/version.h>

#include <linux/videodev2.h>

#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
#include <media/v4l2-device.h>
#include <media/videobuf2-v4l2.h>
#include <media/v4l2-mc.h>

#include <trace/events/v4l2.h>

/* Zero out the end of the struct pointed to by p.  Everything after, but
 * not including, the specified field is cleared. */
#define CLEAR_AFTER_FIELD(p, field) \
	memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
	0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))

#define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)

struct std_descr {
	v4l2_std_id std;
	const char *descr;
};

static const struct std_descr standards[] = {
	{ V4L2_STD_NTSC, 	"NTSC"      },
	{ V4L2_STD_NTSC_M, 	"NTSC-M"    },
	{ V4L2_STD_NTSC_M_JP, 	"NTSC-M-JP" },
	{ V4L2_STD_NTSC_M_KR,	"NTSC-M-KR" },
	{ V4L2_STD_NTSC_443, 	"NTSC-443"  },
	{ V4L2_STD_PAL, 	"PAL"       },
	{ V4L2_STD_PAL_BG, 	"PAL-BG"    },
	{ V4L2_STD_PAL_B, 	"PAL-B"     },
	{ V4L2_STD_PAL_B1, 	"PAL-B1"    },
	{ V4L2_STD_PAL_G, 	"PAL-G"     },
	{ V4L2_STD_PAL_H, 	"PAL-H"     },
	{ V4L2_STD_PAL_I, 	"PAL-I"     },
	{ V4L2_STD_PAL_DK, 	"PAL-DK"    },
	{ V4L2_STD_PAL_D, 	"PAL-D"     },
	{ V4L2_STD_PAL_D1, 	"PAL-D1"    },
	{ V4L2_STD_PAL_K, 	"PAL-K"     },
	{ V4L2_STD_PAL_M, 	"PAL-M"     },
	{ V4L2_STD_PAL_N, 	"PAL-N"     },
	{ V4L2_STD_PAL_Nc, 	"PAL-Nc"    },
	{ V4L2_STD_PAL_60, 	"PAL-60"    },
	{ V4L2_STD_SECAM, 	"SECAM"     },
	{ V4L2_STD_SECAM_B, 	"SECAM-B"   },
	{ V4L2_STD_SECAM_G, 	"SECAM-G"   },
	{ V4L2_STD_SECAM_H, 	"SECAM-H"   },
	{ V4L2_STD_SECAM_DK, 	"SECAM-DK"  },
	{ V4L2_STD_SECAM_D, 	"SECAM-D"   },
	{ V4L2_STD_SECAM_K, 	"SECAM-K"   },
	{ V4L2_STD_SECAM_K1, 	"SECAM-K1"  },
	{ V4L2_STD_SECAM_L, 	"SECAM-L"   },
	{ V4L2_STD_SECAM_LC, 	"SECAM-Lc"  },
	{ 0, 			"Unknown"   }
};

/* video4linux standard ID conversion to standard name
 */
const char *v4l2_norm_to_name(v4l2_std_id id)
{
	u32 myid = id;
	int i;

	/* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
	   64 bit comparations. So, on that architecture, with some gcc
	   variants, compilation fails. Currently, the max value is 30bit wide.
	 */
	BUG_ON(myid != id);

	for (i = 0; standards[i].std; i++)
		if (myid == standards[i].std)
			break;
	return standards[i].descr;
}
EXPORT_SYMBOL(v4l2_norm_to_name);

/* Returns frame period for the given standard */
void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
{
	if (id & V4L2_STD_525_60) {
		frameperiod->numerator = 1001;
		frameperiod->denominator = 30000;
	} else {
		frameperiod->numerator = 1;
		frameperiod->denominator = 25;
	}
}
EXPORT_SYMBOL(v4l2_video_std_frame_period);

/* Fill in the fields of a v4l2_standard structure according to the
   'id' and 'transmission' parameters.  Returns negative on error.  */
int v4l2_video_std_construct(struct v4l2_standard *vs,
			     int id, const char *name)
{
	vs->id = id;
	v4l2_video_std_frame_period(id, &vs->frameperiod);
	vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
	strlcpy(vs->name, name, sizeof(vs->name));
	return 0;
}
EXPORT_SYMBOL(v4l2_video_std_construct);

/* ----------------------------------------------------------------- */
/* some arrays for pretty-printing debug messages of enum types      */

const char *v4l2_field_names[] = {
	[V4L2_FIELD_ANY]        = "any",
	[V4L2_FIELD_NONE]       = "none",
	[V4L2_FIELD_TOP]        = "top",
	[V4L2_FIELD_BOTTOM]     = "bottom",
	[V4L2_FIELD_INTERLACED] = "interlaced",
	[V4L2_FIELD_SEQ_TB]     = "seq-tb",
	[V4L2_FIELD_SEQ_BT]     = "seq-bt",
	[V4L2_FIELD_ALTERNATE]  = "alternate",
	[V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
	[V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
};
EXPORT_SYMBOL(v4l2_field_names);

const char *v4l2_type_names[] = {
	[0]				   = "0",
	[V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
	[V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
	[V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
	[V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
	[V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
	[V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
	[V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
	[V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
	[V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
	[V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
	[V4L2_BUF_TYPE_SDR_CAPTURE]        = "sdr-cap",
	[V4L2_BUF_TYPE_SDR_OUTPUT]         = "sdr-out",
};
EXPORT_SYMBOL(v4l2_type_names);

static const char *v4l2_memory_names[] = {
	[V4L2_MEMORY_MMAP]    = "mmap",
	[V4L2_MEMORY_USERPTR] = "userptr",
	[V4L2_MEMORY_OVERLAY] = "overlay",
	[V4L2_MEMORY_DMABUF] = "dmabuf",
};

#define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")

/* ------------------------------------------------------------------ */
/* debug help functions                                               */

static void v4l_print_querycap(const void *arg, bool write_only)
{
	const struct v4l2_capability *p = arg;

	pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n",
		(int)sizeof(p->driver), p->driver,
		(int)sizeof(p->card), p->card,
		(int)sizeof(p->bus_info), p->bus_info,
		p->version, p->capabilities, p->device_caps);
}

static void v4l_print_enuminput(const void *arg, bool write_only)
{
	const struct v4l2_input *p = arg;

	pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
		p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
		p->tuner, (unsigned long long)p->std, p->status,
		p->capabilities);
}

static void v4l_print_enumoutput(const void *arg, bool write_only)
{
	const struct v4l2_output *p = arg;

	pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
		p->index, (int)sizeof(p->name), p->name, p->type, p->audioset,
		p->modulator, (unsigned long long)p->std, p->capabilities);
}

static void v4l_print_audio(const void *arg, bool write_only)
{
	const struct v4l2_audio *p = arg;

	if (write_only)
		pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
	else
		pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
			p->index, (int)sizeof(p->name), p->name,
			p->capability, p->mode);
}

static void v4l_print_audioout(const void *arg, bool write_only)
{
	const struct v4l2_audioout *p = arg;

	if (write_only)
		pr_cont("index=%u\n", p->index);
	else
		pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n",
			p->index, (int)sizeof(p->name), p->name,
			p->capability, p->mode);
}

static void v4l_print_fmtdesc(const void *arg, bool write_only)
{
	const struct v4l2_fmtdesc *p = arg;

	pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n",
		p->index, prt_names(p->type, v4l2_type_names),
		p->flags, (p->pixelformat & 0xff),
		(p->pixelformat >>  8) & 0xff,
		(p->pixelformat >> 16) & 0xff,
		(p->pixelformat >> 24) & 0xff,
		(int)sizeof(p->description), p->description);
}

static void v4l_print_format(const void *arg, bool write_only)
{
	const struct v4l2_format *p = arg;
	const struct v4l2_pix_format *pix;
	const struct v4l2_pix_format_mplane *mp;
	const struct v4l2_vbi_format *vbi;
	const struct v4l2_sliced_vbi_format *sliced;
	const struct v4l2_window *win;
	const struct v4l2_sdr_format *sdr;
	unsigned i;

	pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
	switch (p->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
		pix = &p->fmt.pix;
		pr_cont(", width=%u, height=%u, pixelformat=%c%c%c%c, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
			pix->width, pix->height,
			(pix->pixelformat & 0xff),
			(pix->pixelformat >>  8) & 0xff,
			(pix->pixelformat >> 16) & 0xff,
			(pix->pixelformat >> 24) & 0xff,
			prt_names(pix->field, v4l2_field_names),
			pix->bytesperline, pix->sizeimage,
			pix->colorspace, pix->flags, pix->ycbcr_enc,
			pix->quantization, pix->xfer_func);
		break;
	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
		mp = &p->fmt.pix_mp;
		pr_cont(", width=%u, height=%u, format=%c%c%c%c, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
			mp->width, mp->height,
			(mp->pixelformat & 0xff),
			(mp->pixelformat >>  8) & 0xff,
			(mp->pixelformat >> 16) & 0xff,
			(mp->pixelformat >> 24) & 0xff,
			prt_names(mp->field, v4l2_field_names),
			mp->colorspace, mp->num_planes, mp->flags,
			mp->ycbcr_enc, mp->quantization, mp->xfer_func);
		for (i = 0; i < mp->num_planes; i++)
			printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
					mp->plane_fmt[i].bytesperline,
					mp->plane_fmt[i].sizeimage);
		break;
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
		win = &p->fmt.win;
		/* Note: we can't print the clip list here since the clips
		 * pointer is a userspace pointer, not a kernelspace
		 * pointer. */
		pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, clipcount=%u, clips=%p, bitmap=%p, global_alpha=0x%02x\n",
			win->w.width, win->w.height, win->w.left, win->w.top,
			prt_names(win->field, v4l2_field_names),
			win->chromakey, win->clipcount, win->clips,
			win->bitmap, win->global_alpha);
		break;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
	case V4L2_BUF_TYPE_VBI_OUTPUT:
		vbi = &p->fmt.vbi;
		pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
			vbi->sampling_rate, vbi->offset,
			vbi->samples_per_line,
			(vbi->sample_format & 0xff),
			(vbi->sample_format >>  8) & 0xff,
			(vbi->sample_format >> 16) & 0xff,
			(vbi->sample_format >> 24) & 0xff,
			vbi->start[0], vbi->start[1],
			vbi->count[0], vbi->count[1]);
		break;
	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
		sliced = &p->fmt.sliced;
		pr_cont(", service_set=0x%08x, io_size=%d\n",
				sliced->service_set, sliced->io_size);
		for (i = 0; i < 24; i++)
			printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
				sliced->service_lines[0][i],
				sliced->service_lines[1][i]);
		break;
	case V4L2_BUF_TYPE_SDR_CAPTURE:
	case V4L2_BUF_TYPE_SDR_OUTPUT:
		sdr = &p->fmt.sdr;
		pr_cont(", pixelformat=%c%c%c%c\n",
			(sdr->pixelformat >>  0) & 0xff,
			(sdr->pixelformat >>  8) & 0xff,
			(sdr->pixelformat >> 16) & 0xff,
			(sdr->pixelformat >> 24) & 0xff);
		break;
	}
}

static void v4l_print_framebuffer(const void *arg, bool write_only)
{
	const struct v4l2_framebuffer *p = arg;

	pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%c%c%c%c, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
			p->capability, p->flags, p->base,
			p->fmt.width, p->fmt.height,
			(p->fmt.pixelformat & 0xff),
			(p->fmt.pixelformat >>  8) & 0xff,
			(p->fmt.pixelformat >> 16) & 0xff,
			(p->fmt.pixelformat >> 24) & 0xff,
			p->fmt.bytesperline, p->fmt.sizeimage,
			p->fmt.colorspace);
}

static void v4l_print_buftype(const void *arg, bool write_only)
{
	pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
}

static void v4l_print_modulator(const void *arg, bool write_only)
{
	const struct v4l2_modulator *p = arg;

	if (write_only)
		pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans);
	else
		pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
			p->index, (int)sizeof(p->name), p->name, p->capability,
			p->rangelow, p->rangehigh, p->txsubchans);
}

static void v4l_print_tuner(const void *arg, bool write_only)
{
	const struct v4l2_tuner *p = arg;

	if (write_only)
		pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
	else
		pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, rangelow=%u, rangehigh=%u, signal=%u, afc=%d, rxsubchans=0x%x, audmode=%u\n",
			p->index, (int)sizeof(p->name), p->name, p->type,
			p->capability, p->rangelow,
			p->rangehigh, p->signal, p->afc,
			p->rxsubchans, p->audmode);
}

static void v4l_print_frequency(const void *arg, bool write_only)
{
	const struct v4l2_frequency *p = arg;

	pr_cont("tuner=%u, type=%u, frequency=%u\n",
				p->tuner, p->type, p->frequency);
}

static void v4l_print_standard(const void *arg, bool write_only)
{
	const struct v4l2_standard *p = arg;

	pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n",
		p->index,
		(unsigned long long)p->id, (int)sizeof(p->name), p->name,
		p->frameperiod.numerator,
		p->frameperiod.denominator,
		p->framelines);
}

static void v4l_print_std(const void *arg, bool write_only)
{
	pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
}

static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
{
	const struct v4l2_hw_freq_seek *p = arg;

	pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n",
		p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
		p->rangelow, p->rangehigh);
}

static void v4l_print_requestbuffers(const void *arg, bool write_only)
{
	const struct v4l2_requestbuffers *p = arg;

	pr_cont("count=%d, type=%s, memory=%s\n",
		p->count,
		prt_names(p->type, v4l2_type_names),
		prt_names(p->memory, v4l2_memory_names));
}

static void v4l_print_buffer(const void *arg, bool write_only)
{
	const struct v4l2_buffer *p = arg;
	const struct v4l2_timecode *tc = &p->timecode;
	const struct v4l2_plane *plane;
	int i;

	pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, flags=0x%08x, field=%s, sequence=%d, memory=%s",
			p->timestamp.tv_sec / 3600,
			(int)(p->timestamp.tv_sec / 60) % 60,
			(int)(p->timestamp.tv_sec % 60),
			(long)p->timestamp.tv_usec,
			p->index,
			prt_names(p->type, v4l2_type_names),
			p->flags, prt_names(p->field, v4l2_field_names),
			p->sequence, prt_names(p->memory, v4l2_memory_names));

	if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
		pr_cont("\n");
		for (i = 0; i < p->length; ++i) {
			plane = &p->m.planes[i];
			printk(KERN_DEBUG
				"plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n",
				i, plane->bytesused, plane->data_offset,
				plane->m.userptr, plane->length);
		}
	} else {
		pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n",
			p->bytesused, p->m.userptr, p->length);
	}

	printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n",
			tc->hours, tc->minutes, tc->seconds,
			tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
}

static void v4l_print_exportbuffer(const void *arg, bool write_only)
{
	const struct v4l2_exportbuffer *p = arg;

	pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
		p->fd, prt_names(p->type, v4l2_type_names),
		p->index, p->plane, p->flags);
}

static void v4l_print_create_buffers(const void *arg, bool write_only)
{
	const struct v4l2_create_buffers *p = arg;

	pr_cont("index=%d, count=%d, memory=%s, ",
			p->index, p->count,
			prt_names(p->memory, v4l2_memory_names));
	v4l_print_format(&p->format, write_only);
}

static void v4l_print_streamparm(const void *arg, bool write_only)
{
	const struct v4l2_streamparm *p = arg;

	pr_cont("type=%s", prt_names(p->type, v4l2_type_names));

	if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
	    p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
		const struct v4l2_captureparm *c = &p->parm.capture;

		pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n",
			c->capability, c->capturemode,
			c->timeperframe.numerator, c->timeperframe.denominator,
			c->extendedmode, c->readbuffers);
	} else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
		   p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
		const struct v4l2_outputparm *c = &p->parm.output;

		pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n",
			c->capability, c->outputmode,
			c->timeperframe.numerator, c->timeperframe.denominator,
			c->extendedmode, c->writebuffers);
	} else {
		pr_cont("\n");
	}
}

static void v4l_print_queryctrl(const void *arg, bool write_only)
{
	const struct v4l2_queryctrl *p = arg;

	pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n",
			p->id, p->type, (int)sizeof(p->name), p->name,
			p->minimum, p->maximum,
			p->step, p->default_value, p->flags);
}

static void v4l_print_query_ext_ctrl(const void *arg, bool write_only)
{
	const struct v4l2_query_ext_ctrl *p = arg;

	pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, nr_of_dims=%u, dims=%u,%u,%u,%u\n",
			p->id, p->type, (int)sizeof(p->name), p->name,
			p->minimum, p->maximum,
			p->step, p->default_value, p->flags,
			p->elem_size, p->elems, p->nr_of_dims,
			p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
}

static void v4l_print_querymenu(const void *arg, bool write_only)
{
	const struct v4l2_querymenu *p = arg;

	pr_cont("id=0x%x, index=%d\n", p->id, p->index);
}

static void v4l_print_control(const void *arg, bool write_only)
{
	const struct v4l2_control *p = arg;

	pr_cont("id=0x%x, value=%d\n", p->id, p->value);
}

static void v4l_print_ext_controls(const void *arg, bool write_only)
{
	const struct v4l2_ext_controls *p = arg;
	int i;

	pr_cont("which=0x%x, count=%d, error_idx=%d",
			p->which, p->count, p->error_idx);
	for (i = 0; i < p->count; i++) {
		if (!p->controls[i].size)
			pr_cont(", id/val=0x%x/0x%x",
				p->controls[i].id, p->controls[i].value);
		else
			pr_cont(", id/size=0x%x/%u",
				p->controls[i].id, p->controls[i].size);
	}
	pr_cont("\n");
}

static void v4l_print_cropcap(const void *arg, bool write_only)
{
	const struct v4l2_cropcap *p = arg;

	pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n",
		prt_names(p->type, v4l2_type_names),
		p->bounds.width, p->bounds.height,
		p->bounds.left, p->bounds.top,
		p->defrect.width, p->defrect.height,
		p->defrect.left, p->defrect.top,
		p->pixelaspect.numerator, p->pixelaspect.denominator);
}

static void v4l_print_crop(const void *arg, bool write_only)
{
	const struct v4l2_crop *p = arg;

	pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
		prt_names(p->type, v4l2_type_names),
		p->c.width, p->c.height,
		p->c.left, p->c.top);
}

static void v4l_print_selection(const void *arg, bool write_only)
{
	const struct v4l2_selection *p = arg;

	pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
		prt_names(p->type, v4l2_type_names),
		p->target, p->flags,
		p->r.width, p->r.height, p->r.left, p->r.top);
}

static void v4l_print_jpegcompression(const void *arg, bool write_only)
{
	const struct v4l2_jpegcompression *p = arg;

	pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n",
		p->quality, p->APPn, p->APP_len,
		p->COM_len, p->jpeg_markers);
}

static void v4l_print_enc_idx(const void *arg, bool write_only)
{
	const struct v4l2_enc_idx *p = arg;

	pr_cont("entries=%d, entries_cap=%d\n",
			p->entries, p->entries_cap);
}

static void v4l_print_encoder_cmd(const void *arg, bool write_only)
{
	const struct v4l2_encoder_cmd *p = arg;

	pr_cont("cmd=%d, flags=0x%x\n",
			p->cmd, p->flags);
}

static void v4l_print_decoder_cmd(const void *arg, bool write_only)
{
	const struct v4l2_decoder_cmd *p = arg;

	pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);

	if (p->cmd == V4L2_DEC_CMD_START)
		pr_info("speed=%d, format=%u\n",
				p->start.speed, p->start.format);
	else if (p->cmd == V4L2_DEC_CMD_STOP)
		pr_info("pts=%llu\n", p->stop.pts);
}

static void v4l_print_dbg_chip_info(const void *arg, bool write_only)
{
	const struct v4l2_dbg_chip_info *p = arg;

	pr_cont("type=%u, ", p->match.type);
	if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
		pr_cont("name=%.*s, ",
				(int)sizeof(p->match.name), p->match.name);
	else
		pr_cont("addr=%u, ", p->match.addr);
	pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
}

static void v4l_print_dbg_register(const void *arg, bool write_only)
{
	const struct v4l2_dbg_register *p = arg;

	pr_cont("type=%u, ", p->match.type);
	if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
		pr_cont("name=%.*s, ",
				(int)sizeof(p->match.name), p->match.name);
	else
		pr_cont("addr=%u, ", p->match.addr);
	pr_cont("reg=0x%llx, val=0x%llx\n",
			p->reg, p->val);
}

static void v4l_print_dv_timings(const void *arg, bool write_only)
{
	const struct v4l2_dv_timings *p = arg;

	switch (p->type) {
	case V4L2_DV_BT_656_1120:
		pr_cont("type=bt-656/1120, interlaced=%u, pixelclock=%llu, width=%u, height=%u, polarities=0x%x, hfrontporch=%u, hsync=%u, hbackporch=%u, vfrontporch=%u, vsync=%u, vbackporch=%u, il_vfrontporch=%u, il_vsync=%u, il_vbackporch=%u, standards=0x%x, flags=0x%x\n",
				p->bt.interlaced, p->bt.pixelclock,
				p->bt.width, p->bt.height,
				p->bt.polarities, p->bt.hfrontporch,
				p->bt.hsync, p->bt.hbackporch,
				p->bt.vfrontporch, p->bt.vsync,
				p->bt.vbackporch, p->bt.il_vfrontporch,
				p->bt.il_vsync, p->bt.il_vbackporch,
				p->bt.standards, p->bt.flags);
		break;
	default:
		pr_cont("type=%d\n", p->type);
		break;
	}
}

static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
{
	const struct v4l2_enum_dv_timings *p = arg;

	pr_cont("index=%u, ", p->index);
	v4l_print_dv_timings(&p->timings, write_only);
}

static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
{
	const struct v4l2_dv_timings_cap *p = arg;

	switch (p->type) {
	case V4L2_DV_BT_656_1120:
		pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
			p->bt.min_width, p->bt.max_width,
			p->bt.min_height, p->bt.max_height,
			p->bt.min_pixelclock, p->bt.max_pixelclock,
			p->bt.standards, p->bt.capabilities);
		break;
	default:
		pr_cont("type=%u\n", p->type);
		break;
	}
}

static void v4l_print_frmsizeenum(const void *arg, bool write_only)
{
	const struct v4l2_frmsizeenum *p = arg;

	pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
			p->index,
			(p->pixel_format & 0xff),
			(p->pixel_format >>  8) & 0xff,
			(p->pixel_format >> 16) & 0xff,
			(p->pixel_format >> 24) & 0xff,
			p->type);
	switch (p->type) {
	case V4L2_FRMSIZE_TYPE_DISCRETE:
		pr_cont(", wxh=%ux%u\n",
			p->discrete.width, p->discrete.height);
		break;
	case V4L2_FRMSIZE_TYPE_STEPWISE:
		pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n",
				p->stepwise.min_width,  p->stepwise.min_height,
				p->stepwise.step_width, p->stepwise.step_height,
				p->stepwise.max_width,  p->stepwise.max_height);
		break;
	case V4L2_FRMSIZE_TYPE_CONTINUOUS:
		/* fall through */
	default:
		pr_cont("\n");
		break;
	}
}

static void v4l_print_frmivalenum(const void *arg, bool write_only)
{
	const struct v4l2_frmivalenum *p = arg;

	pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
			p->index,
			(p->pixel_format & 0xff),
			(p->pixel_format >>  8) & 0xff,
			(p->pixel_format >> 16) & 0xff,
			(p->pixel_format >> 24) & 0xff,
			p->width, p->height, p->type);
	switch (p->type) {
	case V4L2_FRMIVAL_TYPE_DISCRETE:
		pr_cont(", fps=%d/%d\n",
				p->discrete.numerator,
				p->discrete.denominator);
		break;
	case V4L2_FRMIVAL_TYPE_STEPWISE:
		pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n",
				p->stepwise.min.numerator,
				p->stepwise.min.denominator,
				p->stepwise.max.numerator,
				p->stepwise.max.denominator,
				p->stepwise.step.numerator,
				p->stepwise.step.denominator);
		break;
	case V4L2_FRMIVAL_TYPE_CONTINUOUS:
		/* fall through */
	default:
		pr_cont("\n");
		break;
	}
}

static void v4l_print_event(const void *arg, bool write_only)
{
	const struct v4l2_event *p = arg;
	const struct v4l2_event_ctrl *c;

	pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n",
			p->type, p->pending, p->sequence, p->id,
			p->timestamp.tv_sec, p->timestamp.tv_nsec);
	switch (p->type) {
	case V4L2_EVENT_VSYNC:
		printk(KERN_DEBUG "field=%s\n",
			prt_names(p->u.vsync.field, v4l2_field_names));
		break;
	case V4L2_EVENT_CTRL:
		c = &p->u.ctrl;
		printk(KERN_DEBUG "changes=0x%x, type=%u, ",
			c->changes, c->type);
		if (c->type == V4L2_CTRL_TYPE_INTEGER64)
			pr_cont("value64=%lld, ", c->value64);
		else
			pr_cont("value=%d, ", c->value);
		pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n",
			c->flags, c->minimum, c->maximum,
			c->step, c->default_value);
		break;
	case V4L2_EVENT_FRAME_SYNC:
		pr_cont("frame_sequence=%u\n",
			p->u.frame_sync.frame_sequence);
		break;
	}
}

static void v4l_print_event_subscription(const void *arg, bool write_only)
{
	const struct v4l2_event_subscription *p = arg;

	pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
			p->type, p->id, p->flags);
}

static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
{
	const struct v4l2_sliced_vbi_cap *p = arg;
	int i;

	pr_cont("type=%s, service_set=0x%08x\n",
			prt_names(p->type, v4l2_type_names), p->service_set);
	for (i = 0; i < 24; i++)
		printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
				p->service_lines[0][i],
				p->service_lines[1][i]);
}

static void v4l_print_freq_band(const void *arg, bool write_only)
{
	const struct v4l2_frequency_band *p = arg;

	pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n",
			p->tuner, p->type, p->index,
			p->capability, p->rangelow,
			p->rangehigh, p->modulation);
}

static void v4l_print_edid(const void *arg, bool write_only)
{
	const struct v4l2_edid *p = arg;

	pr_cont("pad=%u, start_block=%u, blocks=%u\n",
		p->pad, p->start_block, p->blocks);
}

static void v4l_print_u32(const void *arg, bool write_only)
{
	pr_cont("value=%u\n", *(const u32 *)arg);
}

static void v4l_print_newline(const void *arg, bool write_only)
{
	pr_cont("\n");
}

static void v4l_print_default(const void *arg, bool write_only)
{
	pr_cont("driver-specific ioctl\n");
}

static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
{
	__u32 i;

	/* zero the reserved fields */
	c->reserved[0] = c->reserved[1] = 0;
	for (i = 0; i < c->count; i++)
		c->controls[i].reserved2[0] = 0;

	/* V4L2_CID_PRIVATE_BASE cannot be used as control class
	   when using extended controls.
	   Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
	   is it allowed for backwards compatibility.
	 */
	if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE)
		return 0;
	if (!c->which)
		return 1;
	/* Check that all controls are from the same control class. */
	for (i = 0; i < c->count; i++) {
		if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
			c->error_idx = i;
			return 0;
		}
	}
	return 1;
}

static int check_fmt(struct file *file, enum v4l2_buf_type type)
{
	struct video_device *vfd = video_devdata(file);
	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
	bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
	bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;

	if (ops == NULL)
		return -EINVAL;

	switch (type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		if ((is_vid || is_tch) && is_rx &&
		    (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
			return 0;
		break;
	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
		if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
			return 0;
		break;
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
		if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
			return 0;
		break;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
		if (is_vid && is_tx &&
		    (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
			return 0;
		break;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
		if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
			return 0;
		break;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
		if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
			return 0;
		break;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
			return 0;
		break;
	case V4L2_BUF_TYPE_VBI_OUTPUT:
		if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
			return 0;
		break;
	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
		if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
			return 0;
		break;
	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
		if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
			return 0;
		break;
	case V4L2_BUF_TYPE_SDR_CAPTURE:
		if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
			return 0;
		break;
	case V4L2_BUF_TYPE_SDR_OUTPUT:
		if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
			return 0;
		break;
	default:
		break;
	}
	return -EINVAL;
}

static void v4l_sanitize_format(struct v4l2_format *fmt)
{
	unsigned int offset;

	/*
	 * The v4l2_pix_format structure has been extended with fields that were
	 * not previously required to be set to zero by applications. The priv
	 * field, when set to a magic value, indicates the the extended fields
	 * are valid. Otherwise they will contain undefined values. To simplify
	 * the API towards drivers zero the extended fields and set the priv
	 * field to the magic value when the extended pixel format structure
	 * isn't used by applications.
	 */

	if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
	    fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
		return;

	if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC)
		return;

	fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;

	offset = offsetof(struct v4l2_pix_format, priv)
	       + sizeof(fmt->fmt.pix.priv);
	memset(((void *)&fmt->fmt.pix) + offset, 0,
	       sizeof(fmt->fmt.pix) - offset);
}

static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_capability *cap = (struct v4l2_capability *)arg;
	struct video_device *vfd = video_devdata(file);
	int ret;

	cap->version = LINUX_VERSION_CODE;
	cap->device_caps = vfd->device_caps;
	cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;

	ret = ops->vidioc_querycap(file, fh, cap);

	cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
	/*
	 * Drivers MUST fill in device_caps, so check for this and
	 * warn if it was forgotten.
	 */
	WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) ||
		!cap->device_caps, "Bad caps for driver %s, %x %x",
		cap->driver, cap->capabilities, cap->device_caps);
	cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;

	return ret;
}

static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	int ret;

	ret = v4l_enable_media_source(vfd);
	if (ret)
		return ret;
	return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
}

static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
}

static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd;
	u32 *p = arg;

	vfd = video_devdata(file);
	*p = v4l2_prio_max(vfd->prio);
	return 0;
}

static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd;
	struct v4l2_fh *vfh;
	u32 *p = arg;

	vfd = video_devdata(file);
	if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
		return -ENOTTY;
	vfh = file->private_data;
	return v4l2_prio_change(vfd->prio, &vfh->prio, *p);
}

static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_input *p = arg;

	/*
	 * We set the flags for CAP_DV_TIMINGS &
	 * CAP_STD here based on ioctl handler provided by the
	 * driver. If the driver doesn't support these
	 * for a specific input, it must override these flags.
	 */
	if (is_valid_ioctl(vfd, VIDIOC_S_STD))
		p->capabilities |= V4L2_IN_CAP_STD;

	return ops->vidioc_enum_input(file, fh, p);
}

static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_output *p = arg;

	/*
	 * We set the flags for CAP_DV_TIMINGS &
	 * CAP_STD here based on ioctl handler provided by the
	 * driver. If the driver doesn't support these
	 * for a specific output, it must override these flags.
	 */
	if (is_valid_ioctl(vfd, VIDIOC_S_STD))
		p->capabilities |= V4L2_OUT_CAP_STD;

	return ops->vidioc_enum_output(file, fh, p);
}

static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
{
	const unsigned sz = sizeof(fmt->description);
	const char *descr = NULL;
	u32 flags = 0;

	/*
	 * We depart from the normal coding style here since the descriptions
	 * should be aligned so it is easy to see which descriptions will be
	 * longer than 31 characters (the max length for a description).
	 * And frankly, this is easier to read anyway.
	 *
	 * Note that gcc will use O(log N) comparisons to find the right case.
	 */
	switch (fmt->pixelformat) {
	/* Max description length mask:	descr = "0123456789012345678901234567890" */
	case V4L2_PIX_FMT_RGB332:	descr = "8-bit RGB 3-3-2"; break;
	case V4L2_PIX_FMT_RGB444:	descr = "16-bit A/XRGB 4-4-4-4"; break;
	case V4L2_PIX_FMT_ARGB444:	descr = "16-bit ARGB 4-4-4-4"; break;
	case V4L2_PIX_FMT_XRGB444:	descr = "16-bit XRGB 4-4-4-4"; break;
	case V4L2_PIX_FMT_RGB555:	descr = "16-bit A/XRGB 1-5-5-5"; break;
	case V4L2_PIX_FMT_ARGB555:	descr = "16-bit ARGB 1-5-5-5"; break;
	case V4L2_PIX_FMT_XRGB555:	descr = "16-bit XRGB 1-5-5-5"; break;
	case V4L2_PIX_FMT_RGB565:	descr = "16-bit RGB 5-6-5"; break;
	case V4L2_PIX_FMT_RGB555X:	descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
	case V4L2_PIX_FMT_ARGB555X:	descr = "16-bit ARGB 1-5-5-5 BE"; break;
	case V4L2_PIX_FMT_XRGB555X:	descr = "16-bit XRGB 1-5-5-5 BE"; break;
	case V4L2_PIX_FMT_RGB565X:	descr = "16-bit RGB 5-6-5 BE"; break;
	case V4L2_PIX_FMT_BGR666:	descr = "18-bit BGRX 6-6-6-14"; break;
	case V4L2_PIX_FMT_BGR24:	descr = "24-bit BGR 8-8-8"; break;
	case V4L2_PIX_FMT_RGB24:	descr = "24-bit RGB 8-8-8"; break;
	case V4L2_PIX_FMT_BGR32:	descr = "32-bit BGRA/X 8-8-8-8"; break;
	case V4L2_PIX_FMT_ABGR32:	descr = "32-bit BGRA 8-8-8-8"; break;
	case V4L2_PIX_FMT_XBGR32:	descr = "32-bit BGRX 8-8-8-8"; break;
	case V4L2_PIX_FMT_RGB32:	descr = "32-bit A/XRGB 8-8-8-8"; break;
	case V4L2_PIX_FMT_ARGB32:	descr = "32-bit ARGB 8-8-8-8"; break;
	case V4L2_PIX_FMT_XRGB32:	descr = "32-bit XRGB 8-8-8-8"; break;
	case V4L2_PIX_FMT_GREY:		descr = "8-bit Greyscale"; break;
	case V4L2_PIX_FMT_Y4:		descr = "4-bit Greyscale"; break;
	case V4L2_PIX_FMT_Y6:		descr = "6-bit Greyscale"; break;
	case V4L2_PIX_FMT_Y10:		descr = "10-bit Greyscale"; break;
	case V4L2_PIX_FMT_Y12:		descr = "12-bit Greyscale"; break;
	case V4L2_PIX_FMT_Y16:		descr = "16-bit Greyscale"; break;
	case V4L2_PIX_FMT_Y16_BE:	descr = "16-bit Greyscale BE"; break;
	case V4L2_PIX_FMT_Y10BPACK:	descr = "10-bit Greyscale (Packed)"; break;
	case V4L2_PIX_FMT_PAL8:		descr = "8-bit Palette"; break;
	case V4L2_PIX_FMT_UV8:		descr = "8-bit Chrominance UV 4-4"; break;
	case V4L2_PIX_FMT_YVU410:	descr = "Planar YVU 4:1:0"; break;
	case V4L2_PIX_FMT_YVU420:	descr = "Planar YVU 4:2:0"; break;
	case V4L2_PIX_FMT_YUYV:		descr = "YUYV 4:2:2"; break;
	case V4L2_PIX_FMT_YYUV:		descr = "YYUV 4:2:2"; break;
	case V4L2_PIX_FMT_YVYU:		descr = "YVYU 4:2:2"; break;
	case V4L2_PIX_FMT_UYVY:		descr = "UYVY 4:2:2"; break;
	case V4L2_PIX_FMT_VYUY:		descr = "VYUY 4:2:2"; break;
	case V4L2_PIX_FMT_YUV422P:	descr = "Planar YUV 4:2:2"; break;
	case V4L2_PIX_FMT_YUV411P:	descr = "Planar YUV 4:1:1"; break;
	case V4L2_PIX_FMT_Y41P:		descr = "YUV 4:1:1 (Packed)"; break;
	case V4L2_PIX_FMT_YUV444:	descr = "16-bit A/XYUV 4-4-4-4"; break;
	case V4L2_PIX_FMT_YUV555:	descr = "16-bit A/XYUV 1-5-5-5"; break;
	case V4L2_PIX_FMT_YUV565:	descr = "16-bit YUV 5-6-5"; break;
	case V4L2_PIX_FMT_YUV32:	descr = "32-bit A/XYUV 8-8-8-8"; break;
	case V4L2_PIX_FMT_YUV410:	descr = "Planar YUV 4:1:0"; break;
	case V4L2_PIX_FMT_YUV420:	descr = "Planar YUV 4:2:0"; break;
	case V4L2_PIX_FMT_HI240:	descr = "8-bit Dithered RGB (BTTV)"; break;
	case V4L2_PIX_FMT_HM12:		descr = "YUV 4:2:0 (16x16 Macroblocks)"; break;
	case V4L2_PIX_FMT_M420:		descr = "YUV 4:2:0 (M420)"; break;
	case V4L2_PIX_FMT_NV12:		descr = "Y/CbCr 4:2:0"; break;
	case V4L2_PIX_FMT_NV21:		descr = "Y/CrCb 4:2:0"; break;
	case V4L2_PIX_FMT_NV16:		descr = "Y/CbCr 4:2:2"; break;
	case V4L2_PIX_FMT_NV61:		descr = "Y/CrCb 4:2:2"; break;
	case V4L2_PIX_FMT_NV24:		descr = "Y/CbCr 4:4:4"; break;
	case V4L2_PIX_FMT_NV42:		descr = "Y/CrCb 4:4:4"; break;
	case V4L2_PIX_FMT_NV12M:	descr = "Y/CbCr 4:2:0 (N-C)"; break;
	case V4L2_PIX_FMT_NV21M:	descr = "Y/CrCb 4:2:0 (N-C)"; break;
	case V4L2_PIX_FMT_NV16M:	descr = "Y/CbCr 4:2:2 (N-C)"; break;
	case V4L2_PIX_FMT_NV61M:	descr = "Y/CrCb 4:2:2 (N-C)"; break;
	case V4L2_PIX_FMT_NV12MT:	descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break;
	case V4L2_PIX_FMT_NV12MT_16X16:	descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break;
	case V4L2_PIX_FMT_YUV420M:	descr = "Planar YUV 4:2:0 (N-C)"; break;
	case V4L2_PIX_FMT_YVU420M:	descr = "Planar YVU 4:2:0 (N-C)"; break;
	case V4L2_PIX_FMT_YUV422M:	descr = "Planar YUV 4:2:2 (N-C)"; break;
	case V4L2_PIX_FMT_YVU422M:	descr = "Planar YVU 4:2:2 (N-C)"; break;
	case V4L2_PIX_FMT_YUV444M:	descr = "Planar YUV 4:4:4 (N-C)"; break;
	case V4L2_PIX_FMT_YVU444M:	descr = "Planar YVU 4:4:4 (N-C)"; break;
	case V4L2_PIX_FMT_SBGGR8:	descr = "8-bit Bayer BGBG/GRGR"; break;
	case V4L2_PIX_FMT_SGBRG8:	descr = "8-bit Bayer GBGB/RGRG"; break;
	case V4L2_PIX_FMT_SGRBG8:	descr = "8-bit Bayer GRGR/BGBG"; break;
	case V4L2_PIX_FMT_SRGGB8:	descr = "8-bit Bayer RGRG/GBGB"; break;
	case V4L2_PIX_FMT_SBGGR10:	descr = "10-bit Bayer BGBG/GRGR"; break;
	case V4L2_PIX_FMT_SGBRG10:	descr = "10-bit Bayer GBGB/RGRG"; break;
	case V4L2_PIX_FMT_SGRBG10:	descr = "10-bit Bayer GRGR/BGBG"; break;
	case V4L2_PIX_FMT_SRGGB10:	descr = "10-bit Bayer RGRG/GBGB"; break;
	case V4L2_PIX_FMT_SBGGR12:	descr = "12-bit Bayer BGBG/GRGR"; break;
	case V4L2_PIX_FMT_SGBRG12:	descr = "12-bit Bayer GBGB/RGRG"; break;
	case V4L2_PIX_FMT_SGRBG12:	descr = "12-bit Bayer GRGR/BGBG"; break;
	case V4L2_PIX_FMT_SRGGB12:	descr = "12-bit Bayer RGRG/GBGB"; break;
	case V4L2_PIX_FMT_SBGGR10P:	descr = "10-bit Bayer BGBG/GRGR Packed"; break;
	case V4L2_PIX_FMT_SGBRG10P:	descr = "10-bit Bayer GBGB/RGRG Packed"; break;
	case V4L2_PIX_FMT_SGRBG10P:	descr = "10-bit Bayer GRGR/BGBG Packed"; break;
	case V4L2_PIX_FMT_SRGGB10P:	descr = "10-bit Bayer RGRG/GBGB Packed"; break;
	case V4L2_PIX_FMT_SBGGR10ALAW8:	descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
	case V4L2_PIX_FMT_SGBRG10ALAW8:	descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
	case V4L2_PIX_FMT_SGRBG10ALAW8:	descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
	case V4L2_PIX_FMT_SRGGB10ALAW8:	descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
	case V4L2_PIX_FMT_SBGGR10DPCM8:	descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
	case V4L2_PIX_FMT_SGBRG10DPCM8:	descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
	case V4L2_PIX_FMT_SGRBG10DPCM8:	descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
	case V4L2_PIX_FMT_SRGGB10DPCM8:	descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
	case V4L2_PIX_FMT_SBGGR16:	descr = "16-bit Bayer BGBG/GRGR (Exp.)"; break;
	case V4L2_PIX_FMT_SN9C20X_I420:	descr = "GSPCA SN9C20X I420"; break;
	case V4L2_PIX_FMT_SPCA501:	descr = "GSPCA SPCA501"; break;
	case V4L2_PIX_FMT_SPCA505:	descr = "GSPCA SPCA505"; break;
	case V4L2_PIX_FMT_SPCA508:	descr = "GSPCA SPCA508"; break;
	case V4L2_PIX_FMT_STV0680:	descr = "GSPCA STV0680"; break;
	case V4L2_PIX_FMT_TM6000:	descr = "A/V + VBI Mux Packet"; break;
	case V4L2_PIX_FMT_CIT_YYVYUY:	descr = "GSPCA CIT YYVYUY"; break;
	case V4L2_PIX_FMT_KONICA420:	descr = "GSPCA KONICA420"; break;
	case V4L2_SDR_FMT_CU8:		descr = "Complex U8"; break;
	case V4L2_SDR_FMT_CU16LE:	descr = "Complex U16LE"; break;
	case V4L2_SDR_FMT_CS8:		descr = "Complex S8"; break;
	case V4L2_SDR_FMT_CS14LE:	descr = "Complex S14LE"; break;
	case V4L2_SDR_FMT_RU12LE:	descr = "Real U12LE"; break;
	case V4L2_TCH_FMT_DELTA_TD16:	descr = "16-bit signed deltas"; break;
	case V4L2_TCH_FMT_DELTA_TD08:	descr = "8-bit signed deltas"; break;
	case V4L2_TCH_FMT_TU16:		descr = "16-bit unsigned touch data"; break;
	case V4L2_TCH_FMT_TU08:		descr = "8-bit unsigned touch data"; break;

	default:
		/* Compressed formats */
		flags = V4L2_FMT_FLAG_COMPRESSED;
		switch (fmt->pixelformat) {
		/* Max description length mask:	descr = "0123456789012345678901234567890" */
		case V4L2_PIX_FMT_MJPEG:	descr = "Motion-JPEG"; break;
		case V4L2_PIX_FMT_JPEG:		descr = "JFIF JPEG"; break;
		case V4L2_PIX_FMT_DV:		descr = "1394"; break;
		case V4L2_PIX_FMT_MPEG:		descr = "MPEG-1/2/4"; break;
		case V4L2_PIX_FMT_H264:		descr = "H.264"; break;
		case V4L2_PIX_FMT_H264_NO_SC:	descr = "H.264 (No Start Codes)"; break;
		case V4L2_PIX_FMT_H264_MVC:	descr = "H.264 MVC"; break;
		case V4L2_PIX_FMT_H263:		descr = "H.263"; break;
		case V4L2_PIX_FMT_MPEG1:	descr = "MPEG-1 ES"; break;
		case V4L2_PIX_FMT_MPEG2:	descr = "MPEG-2 ES"; break;
		case V4L2_PIX_FMT_MPEG4:	descr = "MPEG-4 part 2 ES"; break;
		case V4L2_PIX_FMT_XVID:		descr = "Xvid"; break;
		case V4L2_PIX_FMT_VC1_ANNEX_G:	descr = "VC-1 (SMPTE 412M Annex G)"; break;
		case V4L2_PIX_FMT_VC1_ANNEX_L:	descr = "VC-1 (SMPTE 412M Annex L)"; break;
		case V4L2_PIX_FMT_VP8:		descr = "VP8"; break;
		case V4L2_PIX_FMT_VP9:		descr = "VP9"; break;
		case V4L2_PIX_FMT_CPIA1:	descr = "GSPCA CPiA YUV"; break;
		case V4L2_PIX_FMT_WNVA:		descr = "WNVA"; break;
		case V4L2_PIX_FMT_SN9C10X:	descr = "GSPCA SN9C10X"; break;
		case V4L2_PIX_FMT_PWC1:		descr = "Raw Philips Webcam Type (Old)"; break;
		case V4L2_PIX_FMT_PWC2:		descr = "Raw Philips Webcam Type (New)"; break;
		case V4L2_PIX_FMT_ET61X251:	descr = "GSPCA ET61X251"; break;
		case V4L2_PIX_FMT_SPCA561:	descr = "GSPCA SPCA561"; break;
		case V4L2_PIX_FMT_PAC207:	descr = "GSPCA PAC207"; break;
		case V4L2_PIX_FMT_MR97310A:	descr = "GSPCA MR97310A"; break;
		case V4L2_PIX_FMT_JL2005BCD:	descr = "GSPCA JL2005BCD"; break;
		case V4L2_PIX_FMT_SN9C2028:	descr = "GSPCA SN9C2028"; break;
		case V4L2_PIX_FMT_SQ905C:	descr = "GSPCA SQ905C"; break;
		case V4L2_PIX_FMT_PJPG:		descr = "GSPCA PJPG"; break;
		case V4L2_PIX_FMT_OV511:	descr = "GSPCA OV511"; break;
		case V4L2_PIX_FMT_OV518:	descr = "GSPCA OV518"; break;
		case V4L2_PIX_FMT_JPGL:		descr = "JPEG Lite"; break;
		case V4L2_PIX_FMT_SE401:	descr = "GSPCA SE401"; break;
		case V4L2_PIX_FMT_S5C_UYVY_JPG:	descr = "S5C73MX interleaved UYVY/JPEG"; break;
		default:
			WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
			if (fmt->description[0])
				return;
			flags = 0;
			snprintf(fmt->description, sz, "%c%c%c%c%s",
					(char)(fmt->pixelformat & 0x7f),
					(char)((fmt->pixelformat >> 8) & 0x7f),
					(char)((fmt->pixelformat >> 16) & 0x7f),
					(char)((fmt->pixelformat >> 24) & 0x7f),
					(fmt->pixelformat & (1 << 31)) ? "-BE" : "");
			break;
		}
	}

	if (descr)
		WARN_ON(strlcpy(fmt->description, descr, sz) >= sz);
	fmt->flags = flags;
}

static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_fmtdesc *p = arg;
	struct video_device *vfd = video_devdata(file);
	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
	bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
	int ret = -EINVAL;

	switch (p->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_enum_fmt_vid_cap))
			break;
		ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
		break;
	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
		if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane))
			break;
		ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
		break;
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
		if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay))
			break;
		ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
		break;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
		if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out))
			break;
		ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
		break;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
		if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane))
			break;
		ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
		break;
	case V4L2_BUF_TYPE_SDR_CAPTURE:
		if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap))
			break;
		ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
		break;
	case V4L2_BUF_TYPE_SDR_OUTPUT:
		if (unlikely(!is_tx || !is_sdr || !ops->vidioc_enum_fmt_sdr_out))
			break;
		ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
		break;
	}
	if (ret == 0)
		v4l_fill_fmtdesc(p);
	return ret;
}

static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_format *p = arg;
	struct video_device *vfd = video_devdata(file);
	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
	bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
	int ret;

	/*
	 * fmt can't be cleared for these overlay types due to the 'clips'
	 * 'clipcount' and 'bitmap' pointers in struct v4l2_window.
	 * Those are provided by the user. So handle these two overlay types
	 * first, and then just do a simple memset for the other types.
	 */
	switch (p->type) {
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
		struct v4l2_clip __user *clips = p->fmt.win.clips;
		u32 clipcount = p->fmt.win.clipcount;
		void __user *bitmap = p->fmt.win.bitmap;

		memset(&p->fmt, 0, sizeof(p->fmt));
		p->fmt.win.clips = clips;
		p->fmt.win.clipcount = clipcount;
		p->fmt.win.bitmap = bitmap;
		break;
	}
	default:
		memset(&p->fmt, 0, sizeof(p->fmt));
		break;
	}

	switch (p->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_g_fmt_vid_cap))
			break;
		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
		ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
		/* just in case the driver zeroed it again */
		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
		return ret;
	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
		if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane))
			break;
		return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
		if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
			break;
		return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
			break;
		return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
		if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
			break;
		return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
		if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out))
			break;
		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
		ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
		/* just in case the driver zeroed it again */
		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
		return ret;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
		if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane))
			break;
		return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
		if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
			break;
		return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
	case V4L2_BUF_TYPE_VBI_OUTPUT:
		if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
			break;
		return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
		if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
			break;
		return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
	case V4L2_BUF_TYPE_SDR_CAPTURE:
		if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap))
			break;
		return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
	case V4L2_BUF_TYPE_SDR_OUTPUT:
		if (unlikely(!is_tx || !is_sdr || !ops->vidioc_g_fmt_sdr_out))
			break;
		return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
	}
	return -EINVAL;
}

static void v4l_pix_format_touch(struct v4l2_pix_format *p)
{
	/*
	 * The v4l2_pix_format structure contains fields that make no sense for
	 * touch. Set them to default values in this case.
	 */

	p->field = V4L2_FIELD_NONE;
	p->colorspace = V4L2_COLORSPACE_RAW;
	p->flags = 0;
	p->ycbcr_enc = 0;
	p->quantization = 0;
	p->xfer_func = 0;
}

static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_format *p = arg;
	struct video_device *vfd = video_devdata(file);
	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
	bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
	int ret;

	ret = v4l_enable_media_source(vfd);
	if (ret)
		return ret;
	v4l_sanitize_format(p);

	switch (p->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_s_fmt_vid_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.pix);
		ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
		/* just in case the driver zeroed it again */
		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
		if (is_tch)
			v4l_pix_format_touch(&p->fmt.pix);
		return ret;
	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
		if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane))
			break;
		CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
		return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
		if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay))
			break;
		CLEAR_AFTER_FIELD(p, fmt.win);
		return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.vbi);
		return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
		if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.sliced);
		return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
		if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.pix);
		ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
		/* just in case the driver zeroed it again */
		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
		return ret;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
		if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane))
			break;
		CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
		return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
		if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay))
			break;
		CLEAR_AFTER_FIELD(p, fmt.win);
		return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
	case V4L2_BUF_TYPE_VBI_OUTPUT:
		if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.vbi);
		return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
		if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.sliced);
		return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
	case V4L2_BUF_TYPE_SDR_CAPTURE:
		if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.sdr);
		return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
	case V4L2_BUF_TYPE_SDR_OUTPUT:
		if (unlikely(!is_tx || !is_sdr || !ops->vidioc_s_fmt_sdr_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.sdr);
		return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
	}
	return -EINVAL;
}

static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_format *p = arg;
	struct video_device *vfd = video_devdata(file);
	bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
	bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
	bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
	bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
	bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
	int ret;

	v4l_sanitize_format(p);

	switch (p->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_try_fmt_vid_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.pix);
		ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
		/* just in case the driver zeroed it again */
		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
		return ret;
	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
		if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane))
			break;
		CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
		return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
		if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay))
			break;
		CLEAR_AFTER_FIELD(p, fmt.win);
		return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.vbi);
		return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
		if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.sliced);
		return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
		if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.pix);
		ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
		/* just in case the driver zeroed it again */
		p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
		return ret;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
		if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane))
			break;
		CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
		return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
		if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay))
			break;
		CLEAR_AFTER_FIELD(p, fmt.win);
		return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
	case V4L2_BUF_TYPE_VBI_OUTPUT:
		if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.vbi);
		return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
		if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.sliced);
		return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
	case V4L2_BUF_TYPE_SDR_CAPTURE:
		if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap))
			break;
		CLEAR_AFTER_FIELD(p, fmt.sdr);
		return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
	case V4L2_BUF_TYPE_SDR_OUTPUT:
		if (unlikely(!is_tx || !is_sdr || !ops->vidioc_try_fmt_sdr_out))
			break;
		CLEAR_AFTER_FIELD(p, fmt.sdr);
		return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
	}
	return -EINVAL;
}

static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
}

static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
}

static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_tuner *p = arg;
	int err;

	p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
			V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
	err = ops->vidioc_g_tuner(file, fh, p);
	if (!err)
		p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
	return err;
}

static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_tuner *p = arg;
	int ret;

	ret = v4l_enable_media_source(vfd);
	if (ret)
		return ret;
	p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
			V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
	return ops->vidioc_s_tuner(file, fh, p);
}

static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_modulator *p = arg;
	int err;

	if (vfd->vfl_type == VFL_TYPE_RADIO)
		p->type = V4L2_TUNER_RADIO;

	err = ops->vidioc_g_modulator(file, fh, p);
	if (!err)
		p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
	return err;
}

static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_modulator *p = arg;

	if (vfd->vfl_type == VFL_TYPE_RADIO)
		p->type = V4L2_TUNER_RADIO;

	return ops->vidioc_s_modulator(file, fh, p);
}

static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_frequency *p = arg;

	if (vfd->vfl_type == VFL_TYPE_SDR)
		p->type = V4L2_TUNER_SDR;
	else
		p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
	return ops->vidioc_g_frequency(file, fh, p);
}

static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	const struct v4l2_frequency *p = arg;
	enum v4l2_tuner_type type;
	int ret;

	ret = v4l_enable_media_source(vfd);
	if (ret)
		return ret;
	if (vfd->vfl_type == VFL_TYPE_SDR) {
		if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
			return -EINVAL;
	} else {
		type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
		if (type != p->type)
			return -EINVAL;
	}
	return ops->vidioc_s_frequency(file, fh, p);
}

static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_standard *p = arg;
	v4l2_std_id id = vfd->tvnorms, curr_id = 0;
	unsigned int index = p->index, i, j = 0;
	const char *descr = "";

	/* Return -ENODATA if the tvnorms for the current input
	   or output is 0, meaning that it doesn't support this API. */
	if (id == 0)
		return -ENODATA;

	/* Return norm array in a canonical way */
	for (i = 0; i <= index && id; i++) {
		/* last std value in the standards array is 0, so this
		   while always ends there since (id & 0) == 0. */
		while ((id & standards[j].std) != standards[j].std)
			j++;
		curr_id = standards[j].std;
		descr = standards[j].descr;
		j++;
		if (curr_id == 0)
			break;
		if (curr_id != V4L2_STD_PAL &&
				curr_id != V4L2_STD_SECAM &&
				curr_id != V4L2_STD_NTSC)
			id &= ~curr_id;
	}
	if (i <= index)
		return -EINVAL;

	v4l2_video_std_construct(p, curr_id, descr);
	return 0;
}

static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	v4l2_std_id id = *(v4l2_std_id *)arg, norm;
	int ret;

	ret = v4l_enable_media_source(vfd);
	if (ret)
		return ret;
	norm = id & vfd->tvnorms;
	if (vfd->tvnorms && !norm)	/* Check if std is supported */
		return -EINVAL;

	/* Calls the specific handler */
	return ops->vidioc_s_std(file, fh, norm);
}

static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	v4l2_std_id *p = arg;
	int ret;

	ret = v4l_enable_media_source(vfd);
	if (ret)
		return ret;
	/*
	 * If no signal is detected, then the driver should return
	 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
	 * any standards that do not apply removed.
	 *
	 * This means that tuners, audio and video decoders can join
	 * their efforts to improve the standards detection.
	 */
	*p = vfd->tvnorms;
	return ops->vidioc_querystd(file, fh, arg);
}

static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_hw_freq_seek *p = arg;
	enum v4l2_tuner_type type;
	int ret;

	ret = v4l_enable_media_source(vfd);
	if (ret)
		return ret;
	/* s_hw_freq_seek is not supported for SDR for now */
	if (vfd->vfl_type == VFL_TYPE_SDR)
		return -EINVAL;

	type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
		V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
	if (p->type != type)
		return -EINVAL;
	return ops->vidioc_s_hw_freq_seek(file, fh, p);
}

static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
}

static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_requestbuffers *p = arg;
	int ret = check_fmt(file, p->type);

	if (ret)
		return ret;

	CLEAR_AFTER_FIELD(p, memory);

	return ops->vidioc_reqbufs(file, fh, p);
}

static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_buffer *p = arg;
	int ret = check_fmt(file, p->type);

	return ret ? ret : ops->vidioc_querybuf(file, fh, p);
}

static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_buffer *p = arg;
	int ret = check_fmt(file, p->type);

	return ret ? ret : ops->vidioc_qbuf(file, fh, p);
}

static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_buffer *p = arg;
	int ret = check_fmt(file, p->type);

	return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
}

static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_create_buffers *create = arg;
	int ret = check_fmt(file, create->format.type);

	if (ret)
		return ret;

	CLEAR_AFTER_FIELD(create, format);

	v4l_sanitize_format(&create->format);

	ret = ops->vidioc_create_bufs(file, fh, create);

	if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
	    create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
		create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;

	return ret;
}

static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_buffer *b = arg;
	int ret = check_fmt(file, b->type);

	return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
}

static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_streamparm *p = arg;
	v4l2_std_id std;
	int ret = check_fmt(file, p->type);

	if (ret)
		return ret;
	if (ops->vidioc_g_parm)
		return ops->vidioc_g_parm(file, fh, p);
	if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
	    p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
		return -EINVAL;
	p->parm.capture.readbuffers = 2;
	ret = ops->vidioc_g_std(file, fh, &std);
	if (ret == 0)
		v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe);
	return ret;
}

static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_streamparm *p = arg;
	int ret = check_fmt(file, p->type);

	return ret ? ret : ops->vidioc_s_parm(file, fh, p);
}

static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_queryctrl *p = arg;
	struct v4l2_fh *vfh =
		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;

	if (vfh && vfh->ctrl_handler)
		return v4l2_queryctrl(vfh->ctrl_handler, p);
	if (vfd->ctrl_handler)
		return v4l2_queryctrl(vfd->ctrl_handler, p);
	if (ops->vidioc_queryctrl)
		return ops->vidioc_queryctrl(file, fh, p);
	return -ENOTTY;
}

static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_query_ext_ctrl *p = arg;
	struct v4l2_fh *vfh =
		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;

	if (vfh && vfh->ctrl_handler)
		return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
	if (vfd->ctrl_handler)
		return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
	if (ops->vidioc_query_ext_ctrl)
		return ops->vidioc_query_ext_ctrl(file, fh, p);
	return -ENOTTY;
}

static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_querymenu *p = arg;
	struct v4l2_fh *vfh =
		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;

	if (vfh && vfh->ctrl_handler)
		return v4l2_querymenu(vfh->ctrl_handler, p);
	if (vfd->ctrl_handler)
		return v4l2_querymenu(vfd->ctrl_handler, p);
	if (ops->vidioc_querymenu)
		return ops->vidioc_querymenu(file, fh, p);
	return -ENOTTY;
}

static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_control *p = arg;
	struct v4l2_fh *vfh =
		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
	struct v4l2_ext_controls ctrls;
	struct v4l2_ext_control ctrl;

	if (vfh && vfh->ctrl_handler)
		return v4l2_g_ctrl(vfh->ctrl_handler, p);
	if (vfd->ctrl_handler)
		return v4l2_g_ctrl(vfd->ctrl_handler, p);
	if (ops->vidioc_g_ctrl)
		return ops->vidioc_g_ctrl(file, fh, p);
	if (ops->vidioc_g_ext_ctrls == NULL)
		return -ENOTTY;

	ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
	ctrls.count = 1;
	ctrls.controls = &ctrl;
	ctrl.id = p->id;
	ctrl.value = p->value;
	if (check_ext_ctrls(&ctrls, 1)) {
		int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);

		if (ret == 0)
			p->value = ctrl.value;
		return ret;
	}
	return -EINVAL;
}

static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_control *p = arg;
	struct v4l2_fh *vfh =
		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
	struct v4l2_ext_controls ctrls;
	struct v4l2_ext_control ctrl;

	if (vfh && vfh->ctrl_handler)
		return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
	if (vfd->ctrl_handler)
		return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
	if (ops->vidioc_s_ctrl)
		return ops->vidioc_s_ctrl(file, fh, p);
	if (ops->vidioc_s_ext_ctrls == NULL)
		return -ENOTTY;

	ctrls.which = V4L2_CTRL_ID2WHICH(p->id);
	ctrls.count = 1;
	ctrls.controls = &ctrl;
	ctrl.id = p->id;
	ctrl.value = p->value;
	if (check_ext_ctrls(&ctrls, 1))
		return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
	return -EINVAL;
}

static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_ext_controls *p = arg;
	struct v4l2_fh *vfh =
		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;

	p->error_idx = p->count;
	if (vfh && vfh->ctrl_handler)
		return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
	if (vfd->ctrl_handler)
		return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
	if (ops->vidioc_g_ext_ctrls == NULL)
		return -ENOTTY;
	return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
					-EINVAL;
}

static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_ext_controls *p = arg;
	struct v4l2_fh *vfh =
		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;

	p->error_idx = p->count;
	if (vfh && vfh->ctrl_handler)
		return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
	if (vfd->ctrl_handler)
		return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
	if (ops->vidioc_s_ext_ctrls == NULL)
		return -ENOTTY;
	return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
					-EINVAL;
}

static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_ext_controls *p = arg;
	struct v4l2_fh *vfh =
		test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;

	p->error_idx = p->count;
	if (vfh && vfh->ctrl_handler)
		return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
	if (vfd->ctrl_handler)
		return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
	if (ops->vidioc_try_ext_ctrls == NULL)
		return -ENOTTY;
	return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
					-EINVAL;
}

static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_crop *p = arg;
	struct v4l2_selection s = {
		.type = p->type,
	};
	int ret;

	if (ops->vidioc_g_crop)
		return ops->vidioc_g_crop(file, fh, p);
	/* simulate capture crop using selection api */

	/* crop means compose for output devices */
	if (V4L2_TYPE_IS_OUTPUT(p->type))
		s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
	else
		s.target = V4L2_SEL_TGT_CROP_ACTIVE;

	ret = ops->vidioc_g_selection(file, fh, &s);

	/* copying results to old structure on success */
	if (!ret)
		p->c = s.r;
	return ret;
}

static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_crop *p = arg;
	struct v4l2_selection s = {
		.type = p->type,
		.r = p->c,
	};

	if (ops->vidioc_s_crop)
		return ops->vidioc_s_crop(file, fh, p);
	/* simulate capture crop using selection api */

	/* crop means compose for output devices */
	if (V4L2_TYPE_IS_OUTPUT(p->type))
		s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
	else
		s.target = V4L2_SEL_TGT_CROP_ACTIVE;

	return ops->vidioc_s_selection(file, fh, &s);
}

static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_cropcap *p = arg;
	struct v4l2_selection s = { .type = p->type };
	int ret = 0;

	/* setting trivial pixelaspect */
	p->pixelaspect.numerator = 1;
	p->pixelaspect.denominator = 1;

	/*
	 * The determine_valid_ioctls() call already should ensure
	 * that this can never happen, but just in case...
	 */
	if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection))
		return -ENOTTY;

	if (ops->vidioc_cropcap)
		ret = ops->vidioc_cropcap(file, fh, p);

	if (!ops->vidioc_g_selection)
		return ret;

	/*
	 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
	 * square pixel aspect ratio in that case.
	 */
	if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
		return ret;

	/* Use g_selection() to fill in the bounds and defrect rectangles */

	/* obtaining bounds */
	if (V4L2_TYPE_IS_OUTPUT(p->type))
		s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
	else
		s.target = V4L2_SEL_TGT_CROP_BOUNDS;

	ret = ops->vidioc_g_selection(file, fh, &s);
	if (ret)
		return ret;
	p->bounds = s.r;

	/* obtaining defrect */
	if (V4L2_TYPE_IS_OUTPUT(p->type))
		s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
	else
		s.target = V4L2_SEL_TGT_CROP_DEFAULT;

	ret = ops->vidioc_g_selection(file, fh, &s);
	if (ret)
		return ret;
	p->defrect = s.r;

	return 0;
}

static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	int ret;

	if (vfd->v4l2_dev)
		pr_info("%s: =================  START STATUS  =================\n",
			vfd->v4l2_dev->name);
	ret = ops->vidioc_log_status(file, fh);
	if (vfd->v4l2_dev)
		pr_info("%s: ==================  END STATUS  ==================\n",
			vfd->v4l2_dev->name);
	return ret;
}

static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
#ifdef CONFIG_VIDEO_ADV_DEBUG
	struct v4l2_dbg_register *p = arg;
	struct video_device *vfd = video_devdata(file);
	struct v4l2_subdev *sd;
	int idx = 0;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
		if (vfd->v4l2_dev == NULL)
			return -EINVAL;
		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
			if (p->match.addr == idx++)
				return v4l2_subdev_call(sd, core, g_register, p);
		return -EINVAL;
	}
	if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
	    (ops->vidioc_g_chip_info || p->match.addr == 0))
		return ops->vidioc_g_register(file, fh, p);
	return -EINVAL;
#else
	return -ENOTTY;
#endif
}

static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
#ifdef CONFIG_VIDEO_ADV_DEBUG
	const struct v4l2_dbg_register *p = arg;
	struct video_device *vfd = video_devdata(file);
	struct v4l2_subdev *sd;
	int idx = 0;

	if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
	if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
		if (vfd->v4l2_dev == NULL)
			return -EINVAL;
		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
			if (p->match.addr == idx++)
				return v4l2_subdev_call(sd, core, s_register, p);
		return -EINVAL;
	}
	if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
	    (ops->vidioc_g_chip_info || p->match.addr == 0))
		return ops->vidioc_s_register(file, fh, p);
	return -EINVAL;
#else
	return -ENOTTY;
#endif
}

static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
#ifdef CONFIG_VIDEO_ADV_DEBUG
	struct video_device *vfd = video_devdata(file);
	struct v4l2_dbg_chip_info *p = arg;
	struct v4l2_subdev *sd;
	int idx = 0;

	switch (p->match.type) {
	case V4L2_CHIP_MATCH_BRIDGE:
		if (ops->vidioc_s_register)
			p->flags |= V4L2_CHIP_FL_WRITABLE;
		if (ops->vidioc_g_register)
			p->flags |= V4L2_CHIP_FL_READABLE;
		strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
		if (ops->vidioc_g_chip_info)
			return ops->vidioc_g_chip_info(file, fh, arg);
		if (p->match.addr)
			return -EINVAL;
		return 0;

	case V4L2_CHIP_MATCH_SUBDEV:
		if (vfd->v4l2_dev == NULL)
			break;
		v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
			if (p->match.addr != idx++)
				continue;
			if (sd->ops->core && sd->ops->core->s_register)
				p->flags |= V4L2_CHIP_FL_WRITABLE;
			if (sd->ops->core && sd->ops->core->g_register)
				p->flags |= V4L2_CHIP_FL_READABLE;
			strlcpy(p->name, sd->name, sizeof(p->name));
			return 0;
		}
		break;
	}
	return -EINVAL;
#else
	return -ENOTTY;
#endif
}

static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
}

static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	return ops->vidioc_subscribe_event(fh, arg);
}

static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	return ops->vidioc_unsubscribe_event(fh, arg);
}

static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct v4l2_sliced_vbi_cap *p = arg;
	int ret = check_fmt(file, p->type);

	if (ret)
		return ret;

	/* Clear up to type, everything after type is zeroed already */
	memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));

	return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
}

static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_frequency_band *p = arg;
	enum v4l2_tuner_type type;
	int err;

	if (vfd->vfl_type == VFL_TYPE_SDR) {
		if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
			return -EINVAL;
		type = p->type;
	} else {
		type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
				V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
		if (type != p->type)
			return -EINVAL;
	}
	if (ops->vidioc_enum_freq_bands) {
		err = ops->vidioc_enum_freq_bands(file, fh, p);
		if (err != -ENOTTY)
			return err;
	}
	if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
		struct v4l2_tuner t = {
			.index = p->tuner,
			.type = type,
		};

		if (p->index)
			return -EINVAL;
		err = ops->vidioc_g_tuner(file, fh, &t);
		if (err)
			return err;
		p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
		p->rangelow = t.rangelow;
		p->rangehigh = t.rangehigh;
		p->modulation = (type == V4L2_TUNER_RADIO) ?
			V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
		return 0;
	}
	if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
		struct v4l2_modulator m = {
			.index = p->tuner,
		};

		if (type != V4L2_TUNER_RADIO)
			return -EINVAL;
		if (p->index)
			return -EINVAL;
		err = ops->vidioc_g_modulator(file, fh, &m);
		if (err)
			return err;
		p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
		p->rangelow = m.rangelow;
		p->rangehigh = m.rangehigh;
		p->modulation = (type == V4L2_TUNER_RADIO) ?
			V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
		return 0;
	}
	return -ENOTTY;
}

struct v4l2_ioctl_info {
	unsigned int ioctl;
	u32 flags;
	const char * const name;
	union {
		u32 offset;
		int (*func)(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *p);
	} u;
	void (*debug)(const void *arg, bool write_only);
};

/* This control needs a priority check */
#define INFO_FL_PRIO	(1 << 0)
/* This control can be valid if the filehandle passes a control handler. */
#define INFO_FL_CTRL	(1 << 1)
/* This is a standard ioctl, no need for special code */
#define INFO_FL_STD	(1 << 2)
/* This is ioctl has its own function */
#define INFO_FL_FUNC	(1 << 3)
/* Queuing ioctl */
#define INFO_FL_QUEUE	(1 << 4)
/* Zero struct from after the field to the end */
#define INFO_FL_CLEAR(v4l2_struct, field)			\
	((offsetof(struct v4l2_struct, field) +			\
	  sizeof(((struct v4l2_struct *)0)->field)) << 16)
#define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)

#define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags)			\
	[_IOC_NR(_ioctl)] = {						\
		.ioctl = _ioctl,					\
		.flags = _flags | INFO_FL_STD,				\
		.name = #_ioctl,					\
		.u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc),	\
		.debug = _debug,					\
	}

#define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags)			\
	[_IOC_NR(_ioctl)] = {						\
		.ioctl = _ioctl,					\
		.flags = _flags | INFO_FL_FUNC,				\
		.name = #_ioctl,					\
		.u.func = _func,					\
		.debug = _debug,					\
	}

static struct v4l2_ioctl_info v4l2_ioctls[] = {
	IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
	IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
	IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
	IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
	IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
	IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
	IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
	IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
	IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
	IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
	IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
	IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
	IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
	IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
	IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
	IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
	IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0),
	IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
	IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
	IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
	IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
	IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
	IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
	IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
	IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
	IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
	IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
	IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
	IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
	IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
	IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0),
	IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO),
	IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
	IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
	IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
	IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
	IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
	IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
	IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
	IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
	IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
	IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
	IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
	IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
	IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
	IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
	IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
	IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
	IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
	IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
	IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
	IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
	IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
	IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
	IOCTL_INFO_FNC(VIDIOC_G_SLICED_VBI_CAP, v4l_g_sliced_vbi_cap, v4l_print_sliced_vbi_cap, INFO_FL_CLEAR(v4l2_sliced_vbi_cap, type)),
	IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
	IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
	IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
	IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
	IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
	IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
	IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
	IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
	IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
	IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
	IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
	IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
	IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
	IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
	IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_dv_timings, bt.flags)),
	IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
	IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
	IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
	IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
	IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
	IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
	IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
	IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
	IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
	IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
	IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)),
	IOCTL_INFO_FNC(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)),
};
#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)

bool v4l2_is_known_ioctl(unsigned int cmd)
{
	if (_IOC_NR(cmd) >= V4L2_IOCTLS)
		return false;
	return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
}

struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
{
	if (_IOC_NR(cmd) >= V4L2_IOCTLS)
		return vdev->lock;
	if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
		return NULL;
	if (vdev->queue && vdev->queue->lock &&
			(v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
		return vdev->queue->lock;
	return vdev->lock;
}

/* Common ioctl debug function. This function can be used by
   external ioctl messages as well as internal V4L ioctl */
void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
{
	const char *dir, *type;

	if (prefix)
		printk(KERN_DEBUG "%s: ", prefix);

	switch (_IOC_TYPE(cmd)) {
	case 'd':
		type = "v4l2_int";
		break;
	case 'V':
		if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
			type = "v4l2";
			break;
		}
		pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
		return;
	default:
		type = "unknown";
		break;
	}

	switch (_IOC_DIR(cmd)) {
	case _IOC_NONE:              dir = "--"; break;
	case _IOC_READ:              dir = "r-"; break;
	case _IOC_WRITE:             dir = "-w"; break;
	case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
	default:                     dir = "*ERR*"; break;
	}
	pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
		type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
}
EXPORT_SYMBOL(v4l_printk_ioctl);

static long __video_do_ioctl(struct file *file,
		unsigned int cmd, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
	bool write_only = false;
	struct v4l2_ioctl_info default_info;
	const struct v4l2_ioctl_info *info;
	void *fh = file->private_data;
	struct v4l2_fh *vfh = NULL;
	int dev_debug = vfd->dev_debug;
	long ret = -ENOTTY;

	if (ops == NULL) {
		pr_warn("%s: has no ioctl_ops.\n",
				video_device_node_name(vfd));
		return ret;
	}

	if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
		vfh = file->private_data;

	if (v4l2_is_known_ioctl(cmd)) {
		info = &v4l2_ioctls[_IOC_NR(cmd)];

		if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
		    !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
			goto done;

		if (vfh && (info->flags & INFO_FL_PRIO)) {
			ret = v4l2_prio_check(vfd->prio, vfh->prio);
			if (ret)
				goto done;
		}
	} else {
		default_info.ioctl = cmd;
		default_info.flags = 0;
		default_info.debug = v4l_print_default;
		info = &default_info;
	}

	write_only = _IOC_DIR(cmd) == _IOC_WRITE;
	if (info->flags & INFO_FL_STD) {
		typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
		const void *p = vfd->ioctl_ops;
		const vidioc_op *vidioc = p + info->u.offset;

		ret = (*vidioc)(file, fh, arg);
	} else if (info->flags & INFO_FL_FUNC) {
		ret = info->u.func(ops, file, fh, arg);
	} else if (!ops->vidioc_default) {
		ret = -ENOTTY;
	} else {
		ret = ops->vidioc_default(file, fh,
			vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
			cmd, arg);
	}

done:
	if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
		if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
		    (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
			return ret;

		v4l_printk_ioctl(video_device_node_name(vfd), cmd);
		if (ret < 0)
			pr_cont(": error %ld", ret);
		if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
			pr_cont("\n");
		else if (_IOC_DIR(cmd) == _IOC_NONE)
			info->debug(arg, write_only);
		else {
			pr_cont(": ");
			info->debug(arg, write_only);
		}
	}

	return ret;
}

static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
			    void __user **user_ptr, void ***kernel_ptr)
{
	int ret = 0;

	switch (cmd) {
	case VIDIOC_PREPARE_BUF:
	case VIDIOC_QUERYBUF:
	case VIDIOC_QBUF:
	case VIDIOC_DQBUF: {
		struct v4l2_buffer *buf = parg;

		if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
			if (buf->length > VIDEO_MAX_PLANES) {
				ret = -EINVAL;
				break;
			}
			*user_ptr = (void __user *)buf->m.planes;
			*kernel_ptr = (void **)&buf->m.planes;
			*array_size = sizeof(struct v4l2_plane) * buf->length;
			ret = 1;
		}
		break;
	}

	case VIDIOC_G_EDID:
	case VIDIOC_S_EDID: {
		struct v4l2_edid *edid = parg;

		if (edid->blocks) {
			if (edid->blocks > 256) {
				ret = -EINVAL;
				break;
			}
			*user_ptr = (void __user *)edid->edid;
			*kernel_ptr = (void **)&edid->edid;
			*array_size = edid->blocks * 128;
			ret = 1;
		}
		break;
	}

	case VIDIOC_S_EXT_CTRLS:
	case VIDIOC_G_EXT_CTRLS:
	case VIDIOC_TRY_EXT_CTRLS: {
		struct v4l2_ext_controls *ctrls = parg;

		if (ctrls->count != 0) {
			if (ctrls->count > V4L2_CID_MAX_CTRLS) {
				ret = -EINVAL;
				break;
			}
			*user_ptr = (void __user *)ctrls->controls;
			*kernel_ptr = (void **)&ctrls->controls;
			*array_size = sizeof(struct v4l2_ext_control)
				    * ctrls->count;
			ret = 1;
		}
		break;
	}
	}

	return ret;
}

long
video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
	       v4l2_kioctl func)
{
	char	sbuf[128];
	void    *mbuf = NULL;
	void	*parg = (void *)arg;
	long	err  = -EINVAL;
	bool	has_array_args;
	size_t  array_size = 0;
	void __user *user_ptr = NULL;
	void	**kernel_ptr = NULL;

	/*  Copy arguments into temp kernel buffer  */
	if (_IOC_DIR(cmd) != _IOC_NONE) {
		if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
			parg = sbuf;
		} else {
			/* too big to allocate from stack */
			mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
			if (NULL == mbuf)
				return -ENOMEM;
			parg = mbuf;
		}

		err = -EFAULT;
		if (_IOC_DIR(cmd) & _IOC_WRITE) {
			unsigned int n = _IOC_SIZE(cmd);

			/*
			 * In some cases, only a few fields are used as input,
			 * i.e. when the app sets "index" and then the driver
			 * fills in the rest of the structure for the thing
			 * with that index.  We only need to copy up the first
			 * non-input field.
			 */
			if (v4l2_is_known_ioctl(cmd)) {
				u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
				if (flags & INFO_FL_CLEAR_MASK)
					n = (flags & INFO_FL_CLEAR_MASK) >> 16;
			}

			if (copy_from_user(parg, (void __user *)arg, n))
				goto out;

			/* zero out anything we don't copy from userspace */
			if (n < _IOC_SIZE(cmd))
				memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
		} else {
			/* read-only ioctl */
			memset(parg, 0, _IOC_SIZE(cmd));
		}
	}

	err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
	if (err < 0)
		goto out;
	has_array_args = err;

	if (has_array_args) {
		/*
		 * When adding new types of array args, make sure that the
		 * parent argument to ioctl (which contains the pointer to the
		 * array) fits into sbuf (so that mbuf will still remain
		 * unused up to here).
		 */
		mbuf = kmalloc(array_size, GFP_KERNEL);
		err = -ENOMEM;
		if (NULL == mbuf)
			goto out_array_args;
		err = -EFAULT;
		if (copy_from_user(mbuf, user_ptr, array_size))
			goto out_array_args;
		*kernel_ptr = mbuf;
	}

	/* Handles IOCTL */
	err = func(file, cmd, parg);
	if (err == -ENOIOCTLCMD)
		err = -ENOTTY;
	if (err == 0) {
		if (cmd == VIDIOC_DQBUF)
			trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
		else if (cmd == VIDIOC_QBUF)
			trace_v4l2_qbuf(video_devdata(file)->minor, parg);
	}

	if (has_array_args) {
		*kernel_ptr = (void __force *)user_ptr;
		if (copy_to_user(user_ptr, mbuf, array_size))
			err = -EFAULT;
		goto out_array_args;
	}
	/* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
	   results that must be returned. */
	if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
		goto out;

out_array_args:
	/*  Copy results into user buffer  */
	switch (_IOC_DIR(cmd)) {
	case _IOC_READ:
	case (_IOC_WRITE | _IOC_READ):
		if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
			err = -EFAULT;
		break;
	}

out:
	kfree(mbuf);
	return err;
}
EXPORT_SYMBOL(video_usercopy);

long video_ioctl2(struct file *file,
	       unsigned int cmd, unsigned long arg)
{
	return video_usercopy(file, cmd, arg, __video_do_ioctl);
}
EXPORT_SYMBOL(video_ioctl2);