summaryrefslogtreecommitdiffstats
path: root/drivers/media/platform/aspeed-video.c
blob: f2c4dadd6a0eb1802149b13b8d0cab6be8b57f42 (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
// SPDX-License-Identifier: GPL-2.0-or-later
// Copyright 2020 IBM Corp.
// Copyright (c) 2019-2020 Intel Corporation

#include <linux/atomic.h>
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/jiffies.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_reserved_mem.h>
#include <linux/platform_device.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/v4l2-controls.h>
#include <linux/videodev2.h>
#include <linux/wait.h>
#include <linux/workqueue.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-device.h>
#include <media/v4l2-dv-timings.h>
#include <media/v4l2-event.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-dma-contig.h>

#define DEVICE_NAME			"aspeed-video"

#define ASPEED_VIDEO_JPEG_NUM_QUALITIES	12
#define ASPEED_VIDEO_JPEG_HEADER_SIZE	10
#define ASPEED_VIDEO_JPEG_QUANT_SIZE	116
#define ASPEED_VIDEO_JPEG_DCT_SIZE	34

#define MAX_FRAME_RATE			60
#define MAX_HEIGHT			1200
#define MAX_WIDTH			1920
#define MIN_HEIGHT			480
#define MIN_WIDTH			640

#define NUM_POLARITY_CHECKS		10
#define INVALID_RESOLUTION_RETRIES	2
#define INVALID_RESOLUTION_DELAY	msecs_to_jiffies(250)
#define RESOLUTION_CHANGE_DELAY		msecs_to_jiffies(500)
#define MODE_DETECT_TIMEOUT		msecs_to_jiffies(500)
#define STOP_TIMEOUT			msecs_to_jiffies(1000)
#define DIRECT_FETCH_THRESHOLD		0x0c0000 /* 1024 * 768 */

#define VE_MAX_SRC_BUFFER_SIZE		0x8ca000 /* 1920 * 1200, 32bpp */
#define VE_JPEG_HEADER_SIZE		0x006000 /* 512 * 12 * 4 */

#define VE_PROTECTION_KEY		0x000
#define  VE_PROTECTION_KEY_UNLOCK	0x1a038aa8

#define VE_SEQ_CTRL			0x004
#define  VE_SEQ_CTRL_TRIG_MODE_DET	BIT(0)
#define  VE_SEQ_CTRL_TRIG_CAPTURE	BIT(1)
#define  VE_SEQ_CTRL_FORCE_IDLE		BIT(2)
#define  VE_SEQ_CTRL_MULT_FRAME		BIT(3)
#define  VE_SEQ_CTRL_TRIG_COMP		BIT(4)
#define  VE_SEQ_CTRL_AUTO_COMP		BIT(5)
#define  VE_SEQ_CTRL_EN_WATCHDOG	BIT(7)
#define  VE_SEQ_CTRL_YUV420		BIT(10)
#define  VE_SEQ_CTRL_COMP_FMT		GENMASK(11, 10)
#define  VE_SEQ_CTRL_HALT		BIT(12)
#define  VE_SEQ_CTRL_EN_WATCHDOG_COMP	BIT(14)
#define  VE_SEQ_CTRL_TRIG_JPG		BIT(15)
#define  VE_SEQ_CTRL_CAP_BUSY		BIT(16)
#define  VE_SEQ_CTRL_COMP_BUSY		BIT(18)

#define AST2500_VE_SEQ_CTRL_JPEG_MODE	BIT(13)
#define AST2400_VE_SEQ_CTRL_JPEG_MODE	BIT(8)

#define VE_CTRL				0x008
#define  VE_CTRL_HSYNC_POL		BIT(0)
#define  VE_CTRL_VSYNC_POL		BIT(1)
#define  VE_CTRL_SOURCE			BIT(2)
#define  VE_CTRL_INT_DE			BIT(4)
#define  VE_CTRL_DIRECT_FETCH		BIT(5)
#define  VE_CTRL_YUV			BIT(6)
#define  VE_CTRL_RGB			BIT(7)
#define  VE_CTRL_CAPTURE_FMT		GENMASK(7, 6)
#define  VE_CTRL_AUTO_OR_CURSOR		BIT(8)
#define  VE_CTRL_CLK_INVERSE		BIT(11)
#define  VE_CTRL_CLK_DELAY		GENMASK(11, 9)
#define  VE_CTRL_INTERLACE		BIT(14)
#define  VE_CTRL_HSYNC_POL_CTRL		BIT(15)
#define  VE_CTRL_FRC			GENMASK(23, 16)

#define VE_TGS_0			0x00c
#define VE_TGS_1			0x010
#define  VE_TGS_FIRST			GENMASK(28, 16)
#define  VE_TGS_LAST			GENMASK(12, 0)

#define VE_SCALING_FACTOR		0x014
#define VE_SCALING_FILTER0		0x018
#define VE_SCALING_FILTER1		0x01c
#define VE_SCALING_FILTER2		0x020
#define VE_SCALING_FILTER3		0x024

#define VE_CAP_WINDOW			0x030
#define VE_COMP_WINDOW			0x034
#define VE_COMP_PROC_OFFSET		0x038
#define VE_COMP_OFFSET			0x03c
#define VE_JPEG_ADDR			0x040
#define VE_SRC0_ADDR			0x044
#define VE_SRC_SCANLINE_OFFSET		0x048
#define VE_SRC1_ADDR			0x04c
#define VE_COMP_ADDR			0x054

#define VE_STREAM_BUF_SIZE		0x058
#define  VE_STREAM_BUF_SIZE_N_PACKETS	GENMASK(5, 3)
#define  VE_STREAM_BUF_SIZE_P_SIZE	GENMASK(2, 0)

#define VE_COMP_CTRL			0x060
#define  VE_COMP_CTRL_VQ_DCT_ONLY	BIT(0)
#define  VE_COMP_CTRL_VQ_4COLOR		BIT(1)
#define  VE_COMP_CTRL_QUANTIZE		BIT(2)
#define  VE_COMP_CTRL_EN_BQ		BIT(4)
#define  VE_COMP_CTRL_EN_CRYPTO		BIT(5)
#define  VE_COMP_CTRL_DCT_CHR		GENMASK(10, 6)
#define  VE_COMP_CTRL_DCT_LUM		GENMASK(15, 11)
#define  VE_COMP_CTRL_EN_HQ		BIT(16)
#define  VE_COMP_CTRL_RSVD		BIT(19)
#define  VE_COMP_CTRL_ENCODE		GENMASK(21, 20)
#define  VE_COMP_CTRL_HQ_DCT_CHR	GENMASK(26, 22)
#define  VE_COMP_CTRL_HQ_DCT_LUM	GENMASK(31, 27)

#define AST2400_VE_COMP_SIZE_READ_BACK	0x078
#define AST2600_VE_COMP_SIZE_READ_BACK	0x084

#define VE_SRC_LR_EDGE_DET		0x090
#define  VE_SRC_LR_EDGE_DET_LEFT	GENMASK(11, 0)
#define  VE_SRC_LR_EDGE_DET_NO_V	BIT(12)
#define  VE_SRC_LR_EDGE_DET_NO_H	BIT(13)
#define  VE_SRC_LR_EDGE_DET_NO_DISP	BIT(14)
#define  VE_SRC_LR_EDGE_DET_NO_CLK	BIT(15)
#define  VE_SRC_LR_EDGE_DET_RT_SHF	16
#define  VE_SRC_LR_EDGE_DET_RT		GENMASK(27, VE_SRC_LR_EDGE_DET_RT_SHF)
#define  VE_SRC_LR_EDGE_DET_INTERLACE	BIT(31)

#define VE_SRC_TB_EDGE_DET		0x094
#define  VE_SRC_TB_EDGE_DET_TOP		GENMASK(12, 0)
#define  VE_SRC_TB_EDGE_DET_BOT_SHF	16
#define  VE_SRC_TB_EDGE_DET_BOT		GENMASK(28, VE_SRC_TB_EDGE_DET_BOT_SHF)

#define VE_MODE_DETECT_STATUS		0x098
#define  VE_MODE_DETECT_H_PIXELS	GENMASK(11, 0)
#define  VE_MODE_DETECT_V_LINES_SHF	16
#define  VE_MODE_DETECT_V_LINES		GENMASK(27, VE_MODE_DETECT_V_LINES_SHF)
#define  VE_MODE_DETECT_STATUS_VSYNC	BIT(28)
#define  VE_MODE_DETECT_STATUS_HSYNC	BIT(29)

#define VE_SYNC_STATUS			0x09c
#define  VE_SYNC_STATUS_HSYNC		GENMASK(11, 0)
#define  VE_SYNC_STATUS_VSYNC_SHF	16
#define  VE_SYNC_STATUS_VSYNC		GENMASK(27, VE_SYNC_STATUS_VSYNC_SHF)

#define VE_INTERRUPT_CTRL		0x304
#define VE_INTERRUPT_STATUS		0x308
#define  VE_INTERRUPT_MODE_DETECT_WD	BIT(0)
#define  VE_INTERRUPT_CAPTURE_COMPLETE	BIT(1)
#define  VE_INTERRUPT_COMP_READY	BIT(2)
#define  VE_INTERRUPT_COMP_COMPLETE	BIT(3)
#define  VE_INTERRUPT_MODE_DETECT	BIT(4)
#define  VE_INTERRUPT_FRAME_COMPLETE	BIT(5)
#define  VE_INTERRUPT_DECODE_ERR	BIT(6)
#define  VE_INTERRUPT_HALT_READY	BIT(8)
#define  VE_INTERRUPT_HANG_WD		BIT(9)
#define  VE_INTERRUPT_STREAM_DESC	BIT(10)
#define  VE_INTERRUPT_VSYNC_DESC	BIT(11)

#define VE_MODE_DETECT			0x30c
#define VE_MEM_RESTRICT_START		0x310
#define VE_MEM_RESTRICT_END		0x314

enum {
	VIDEO_MODE_DETECT_DONE,
	VIDEO_RES_CHANGE,
	VIDEO_RES_DETECT,
	VIDEO_STREAMING,
	VIDEO_FRAME_INPRG,
	VIDEO_STOPPED,
	VIDEO_CLOCKS_ON,
};

struct aspeed_video_addr {
	unsigned int size;
	dma_addr_t dma;
	void *virt;
};

struct aspeed_video_buffer {
	struct vb2_v4l2_buffer vb;
	struct list_head link;
};

#define to_aspeed_video_buffer(x) \
	container_of((x), struct aspeed_video_buffer, vb)

struct aspeed_video {
	void __iomem *base;
	struct clk *eclk;
	struct clk *vclk;

	struct device *dev;
	struct v4l2_ctrl_handler ctrl_handler;
	struct v4l2_device v4l2_dev;
	struct v4l2_pix_format pix_fmt;
	struct v4l2_bt_timings active_timings;
	struct v4l2_bt_timings detected_timings;
	u32 v4l2_input_status;
	struct vb2_queue queue;
	struct video_device vdev;
	struct mutex video_lock;	/* v4l2 and videobuf2 lock */

	u32 jpeg_mode;
	u32 comp_size_read;

	wait_queue_head_t wait;
	spinlock_t lock;		/* buffer list lock */
	struct delayed_work res_work;
	struct list_head buffers;
	unsigned long flags;
	unsigned int sequence;

	unsigned int max_compressed_size;
	struct aspeed_video_addr srcs[2];
	struct aspeed_video_addr jpeg;

	bool yuv420;
	unsigned int frame_rate;
	unsigned int jpeg_quality;

	unsigned int frame_bottom;
	unsigned int frame_left;
	unsigned int frame_right;
	unsigned int frame_top;
};

#define to_aspeed_video(x) container_of((x), struct aspeed_video, v4l2_dev)

struct aspeed_video_config {
	u32 jpeg_mode;
	u32 comp_size_read;
};

static const struct aspeed_video_config ast2400_config = {
	.jpeg_mode = AST2400_VE_SEQ_CTRL_JPEG_MODE,
	.comp_size_read = AST2400_VE_COMP_SIZE_READ_BACK,
};

static const struct aspeed_video_config ast2500_config = {
	.jpeg_mode = AST2500_VE_SEQ_CTRL_JPEG_MODE,
	.comp_size_read = AST2400_VE_COMP_SIZE_READ_BACK,
};

static const struct aspeed_video_config ast2600_config = {
	.jpeg_mode = AST2500_VE_SEQ_CTRL_JPEG_MODE,
	.comp_size_read = AST2600_VE_COMP_SIZE_READ_BACK,
};

static const u32 aspeed_video_jpeg_header[ASPEED_VIDEO_JPEG_HEADER_SIZE] = {
	0xe0ffd8ff, 0x464a1000, 0x01004649, 0x60000101, 0x00006000, 0x0f00feff,
	0x00002d05, 0x00000000, 0x00000000, 0x00dbff00
};

static const u32 aspeed_video_jpeg_quant[ASPEED_VIDEO_JPEG_QUANT_SIZE] = {
	0x081100c0, 0x00000000, 0x00110103, 0x03011102, 0xc4ff0111, 0x00001f00,
	0x01010501, 0x01010101, 0x00000000, 0x00000000, 0x04030201, 0x08070605,
	0xff0b0a09, 0x10b500c4, 0x03010200, 0x03040203, 0x04040505, 0x7d010000,
	0x00030201, 0x12051104, 0x06413121, 0x07615113, 0x32147122, 0x08a19181,
	0xc1b14223, 0xf0d15215, 0x72623324, 0x160a0982, 0x1a191817, 0x28272625,
	0x35342a29, 0x39383736, 0x4544433a, 0x49484746, 0x5554534a, 0x59585756,
	0x6564635a, 0x69686766, 0x7574736a, 0x79787776, 0x8584837a, 0x89888786,
	0x9493928a, 0x98979695, 0xa3a29a99, 0xa7a6a5a4, 0xb2aaa9a8, 0xb6b5b4b3,
	0xbab9b8b7, 0xc5c4c3c2, 0xc9c8c7c6, 0xd4d3d2ca, 0xd8d7d6d5, 0xe2e1dad9,
	0xe6e5e4e3, 0xeae9e8e7, 0xf4f3f2f1, 0xf8f7f6f5, 0xc4fffaf9, 0x00011f00,
	0x01010103, 0x01010101, 0x00000101, 0x00000000, 0x04030201, 0x08070605,
	0xff0b0a09, 0x11b500c4, 0x02010200, 0x04030404, 0x04040507, 0x77020100,
	0x03020100, 0x21050411, 0x41120631, 0x71610751, 0x81322213, 0x91421408,
	0x09c1b1a1, 0xf0523323, 0xd1726215, 0x3424160a, 0x17f125e1, 0x261a1918,
	0x2a292827, 0x38373635, 0x44433a39, 0x48474645, 0x54534a49, 0x58575655,
	0x64635a59, 0x68676665, 0x74736a69, 0x78777675, 0x83827a79, 0x87868584,
	0x928a8988, 0x96959493, 0x9a999897, 0xa5a4a3a2, 0xa9a8a7a6, 0xb4b3b2aa,
	0xb8b7b6b5, 0xc3c2bab9, 0xc7c6c5c4, 0xd2cac9c8, 0xd6d5d4d3, 0xdad9d8d7,
	0xe5e4e3e2, 0xe9e8e7e6, 0xf4f3f2ea, 0xf8f7f6f5, 0xdafffaf9, 0x01030c00,
	0x03110200, 0x003f0011
};

static const u32 aspeed_video_jpeg_dct[ASPEED_VIDEO_JPEG_NUM_QUALITIES]
				      [ASPEED_VIDEO_JPEG_DCT_SIZE] = {
	{ 0x0d140043, 0x0c0f110f, 0x11101114, 0x17141516, 0x1e20321e,
	  0x3d1e1b1b, 0x32242e2b, 0x4b4c3f48, 0x44463f47, 0x61735a50,
	  0x566c5550, 0x88644644, 0x7a766c65, 0x4d808280, 0x8c978d60,
	  0x7e73967d, 0xdbff7b80, 0x1f014300, 0x272d2121, 0x3030582d,
	  0x697bb958, 0xb8b9b97b, 0xb9b8a6a6, 0xb9b9b9b9, 0xb9b9b9b9,
	  0xb9b9b9b9, 0xb9b9b9b9, 0xb9b9b9b9, 0xb9b9b9b9, 0xb9b9b9b9,
	  0xb9b9b9b9, 0xb9b9b9b9, 0xb9b9b9b9, 0xffb9b9b9 },
	{ 0x0c110043, 0x0a0d0f0d, 0x0f0e0f11, 0x14111213, 0x1a1c2b1a,
	  0x351a1818, 0x2b1f2826, 0x4142373f, 0x3c3d373e, 0x55644e46,
	  0x4b5f4a46, 0x77573d3c, 0x6b675f58, 0x43707170, 0x7a847b54,
	  0x6e64836d, 0xdbff6c70, 0x1b014300, 0x22271d1d, 0x2a2a4c27,
	  0x5b6ba04c, 0xa0a0a06b, 0xa0a0a0a0, 0xa0a0a0a0, 0xa0a0a0a0,
	  0xa0a0a0a0, 0xa0a0a0a0, 0xa0a0a0a0, 0xa0a0a0a0, 0xa0a0a0a0,
	  0xa0a0a0a0, 0xa0a0a0a0, 0xa0a0a0a0, 0xffa0a0a0 },
	{ 0x090e0043, 0x090a0c0a, 0x0c0b0c0e, 0x110e0f10, 0x15172415,
	  0x2c151313, 0x241a211f, 0x36372e34, 0x31322e33, 0x4653413a,
	  0x3e4e3d3a, 0x62483231, 0x58564e49, 0x385d5e5d, 0x656d6645,
	  0x5b536c5a, 0xdbff595d, 0x16014300, 0x1c201818, 0x22223f20,
	  0x4b58853f, 0x85858558, 0x85858585, 0x85858585, 0x85858585,
	  0x85858585, 0x85858585, 0x85858585, 0x85858585, 0x85858585,
	  0x85858585, 0x85858585, 0x85858585, 0xff858585 },
	{ 0x070b0043, 0x07080a08, 0x0a090a0b, 0x0d0b0c0c, 0x11121c11,
	  0x23110f0f, 0x1c141a19, 0x2b2b2429, 0x27282428, 0x3842332e,
	  0x313e302e, 0x4e392827, 0x46443e3a, 0x2c4a4a4a, 0x50565137,
	  0x48425647, 0xdbff474a, 0x12014300, 0x161a1313, 0x1c1c331a,
	  0x3d486c33, 0x6c6c6c48, 0x6c6c6c6c, 0x6c6c6c6c, 0x6c6c6c6c,
	  0x6c6c6c6c, 0x6c6c6c6c, 0x6c6c6c6c, 0x6c6c6c6c, 0x6c6c6c6c,
	  0x6c6c6c6c, 0x6c6c6c6c, 0x6c6c6c6c, 0xff6c6c6c },
	{ 0x06090043, 0x05060706, 0x07070709, 0x0a09090a, 0x0d0e160d,
	  0x1b0d0c0c, 0x16101413, 0x21221c20, 0x1e1f1c20, 0x2b332824,
	  0x26302624, 0x3d2d1f1e, 0x3735302d, 0x22393a39, 0x3f443f2b,
	  0x38334338, 0xdbff3739, 0x0d014300, 0x11130e0e, 0x15152613,
	  0x2d355026, 0x50505035, 0x50505050, 0x50505050, 0x50505050,
	  0x50505050, 0x50505050, 0x50505050, 0x50505050, 0x50505050,
	  0x50505050, 0x50505050, 0x50505050, 0xff505050 },
	{ 0x04060043, 0x03040504, 0x05040506, 0x07060606, 0x09090f09,
	  0x12090808, 0x0f0a0d0d, 0x16161315, 0x14151315, 0x1d221b18,
	  0x19201918, 0x281e1514, 0x2423201e, 0x17262726, 0x2a2d2a1c,
	  0x25222d25, 0xdbff2526, 0x09014300, 0x0b0d0a0a, 0x0e0e1a0d,
	  0x1f25371a, 0x37373725, 0x37373737, 0x37373737, 0x37373737,
	  0x37373737, 0x37373737, 0x37373737, 0x37373737, 0x37373737,
	  0x37373737, 0x37373737, 0x37373737, 0xff373737 },
	{ 0x02030043, 0x01020202, 0x02020203, 0x03030303, 0x04040704,
	  0x09040404, 0x07050606, 0x0b0b090a, 0x0a0a090a, 0x0e110d0c,
	  0x0c100c0c, 0x140f0a0a, 0x1211100f, 0x0b131313, 0x1516150e,
	  0x12111612, 0xdbff1213, 0x04014300, 0x05060505, 0x07070d06,
	  0x0f121b0d, 0x1b1b1b12, 0x1b1b1b1b, 0x1b1b1b1b, 0x1b1b1b1b,
	  0x1b1b1b1b, 0x1b1b1b1b, 0x1b1b1b1b, 0x1b1b1b1b, 0x1b1b1b1b,
	  0x1b1b1b1b, 0x1b1b1b1b, 0x1b1b1b1b, 0xff1b1b1b },
	{ 0x01020043, 0x01010101, 0x01010102, 0x02020202, 0x03030503,
	  0x06030202, 0x05030404, 0x07070607, 0x06070607, 0x090b0908,
	  0x080a0808, 0x0d0a0706, 0x0c0b0a0a, 0x070c0d0c, 0x0e0f0e09,
	  0x0c0b0f0c, 0xdbff0c0c, 0x03014300, 0x03040303, 0x04040804,
	  0x0a0c1208, 0x1212120c, 0x12121212, 0x12121212, 0x12121212,
	  0x12121212, 0x12121212, 0x12121212, 0x12121212, 0x12121212,
	  0x12121212, 0x12121212, 0x12121212, 0xff121212 },
	{ 0x01020043, 0x01010101, 0x01010102, 0x02020202, 0x03030503,
	  0x06030202, 0x05030404, 0x07070607, 0x06070607, 0x090b0908,
	  0x080a0808, 0x0d0a0706, 0x0c0b0a0a, 0x070c0d0c, 0x0e0f0e09,
	  0x0c0b0f0c, 0xdbff0c0c, 0x02014300, 0x03030202, 0x04040703,
	  0x080a0f07, 0x0f0f0f0a, 0x0f0f0f0f, 0x0f0f0f0f, 0x0f0f0f0f,
	  0x0f0f0f0f, 0x0f0f0f0f, 0x0f0f0f0f, 0x0f0f0f0f, 0x0f0f0f0f,
	  0x0f0f0f0f, 0x0f0f0f0f, 0x0f0f0f0f, 0xff0f0f0f },
	{ 0x01010043, 0x01010101, 0x01010101, 0x01010101, 0x02020302,
	  0x04020202, 0x03020303, 0x05050405, 0x05050405, 0x07080606,
	  0x06080606, 0x0a070505, 0x09080807, 0x05090909, 0x0a0b0a07,
	  0x09080b09, 0xdbff0909, 0x02014300, 0x02030202, 0x03030503,
	  0x07080c05, 0x0c0c0c08, 0x0c0c0c0c, 0x0c0c0c0c, 0x0c0c0c0c,
	  0x0c0c0c0c, 0x0c0c0c0c, 0x0c0c0c0c, 0x0c0c0c0c, 0x0c0c0c0c,
	  0x0c0c0c0c, 0x0c0c0c0c, 0x0c0c0c0c, 0xff0c0c0c },
	{ 0x01010043, 0x01010101, 0x01010101, 0x01010101, 0x01010201,
	  0x03010101, 0x02010202, 0x03030303, 0x03030303, 0x04050404,
	  0x04050404, 0x06050303, 0x06050505, 0x03060606, 0x07070704,
	  0x06050706, 0xdbff0606, 0x01014300, 0x01020101, 0x02020402,
	  0x05060904, 0x09090906, 0x09090909, 0x09090909, 0x09090909,
	  0x09090909, 0x09090909, 0x09090909, 0x09090909, 0x09090909,
	  0x09090909, 0x09090909, 0x09090909, 0xff090909 },
	{ 0x01010043, 0x01010101, 0x01010101, 0x01010101, 0x01010101,
	  0x01010101, 0x01010101, 0x01010101, 0x01010101, 0x02020202,
	  0x02020202, 0x03020101, 0x03020202, 0x01030303, 0x03030302,
	  0x03020303, 0xdbff0403, 0x01014300, 0x01010101, 0x01010201,
	  0x03040602, 0x06060604, 0x06060606, 0x06060606, 0x06060606,
	  0x06060606, 0x06060606, 0x06060606, 0x06060606, 0x06060606,
	  0x06060606, 0x06060606, 0x06060606, 0xff060606 }
};

static const struct v4l2_dv_timings_cap aspeed_video_timings_cap = {
	.type = V4L2_DV_BT_656_1120,
	.bt = {
		.min_width = MIN_WIDTH,
		.max_width = MAX_WIDTH,
		.min_height = MIN_HEIGHT,
		.max_height = MAX_HEIGHT,
		.min_pixelclock = 6574080, /* 640 x 480 x 24Hz */
		.max_pixelclock = 138240000, /* 1920 x 1200 x 60Hz */
		.standards = V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT |
			V4L2_DV_BT_STD_CVT | V4L2_DV_BT_STD_GTF,
		.capabilities = V4L2_DV_BT_CAP_PROGRESSIVE |
			V4L2_DV_BT_CAP_REDUCED_BLANKING |
			V4L2_DV_BT_CAP_CUSTOM,
	},
};

static void aspeed_video_init_jpeg_table(u32 *table, bool yuv420)
{
	int i;
	unsigned int base;

	for (i = 0; i < ASPEED_VIDEO_JPEG_NUM_QUALITIES; i++) {
		base = 256 * i;	/* AST HW requires this header spacing */
		memcpy(&table[base], aspeed_video_jpeg_header,
		       sizeof(aspeed_video_jpeg_header));

		base += ASPEED_VIDEO_JPEG_HEADER_SIZE;
		memcpy(&table[base], aspeed_video_jpeg_dct[i],
		       sizeof(aspeed_video_jpeg_dct[i]));

		base += ASPEED_VIDEO_JPEG_DCT_SIZE;
		memcpy(&table[base], aspeed_video_jpeg_quant,
		       sizeof(aspeed_video_jpeg_quant));

		if (yuv420)
			table[base + 2] = 0x00220103;
	}
}

static void aspeed_video_update(struct aspeed_video *video, u32 reg, u32 clear,
				u32 bits)
{
	u32 t = readl(video->base + reg);
	u32 before = t;

	t &= ~clear;
	t |= bits;
	writel(t, video->base + reg);
	dev_dbg(video->dev, "update %03x[%08x -> %08x]\n", reg, before,
		readl(video->base + reg));
}

static u32 aspeed_video_read(struct aspeed_video *video, u32 reg)
{
	u32 t = readl(video->base + reg);

	dev_dbg(video->dev, "read %03x[%08x]\n", reg, t);
	return t;
}

static void aspeed_video_write(struct aspeed_video *video, u32 reg, u32 val)
{
	writel(val, video->base + reg);
	dev_dbg(video->dev, "write %03x[%08x]\n", reg,
		readl(video->base + reg));
}

static int aspeed_video_start_frame(struct aspeed_video *video)
{
	dma_addr_t addr;
	unsigned long flags;
	struct aspeed_video_buffer *buf;
	u32 seq_ctrl = aspeed_video_read(video, VE_SEQ_CTRL);

	if (video->v4l2_input_status) {
		dev_dbg(video->dev, "No signal; don't start frame\n");
		return 0;
	}

	if (!(seq_ctrl & VE_SEQ_CTRL_COMP_BUSY) ||
	    !(seq_ctrl & VE_SEQ_CTRL_CAP_BUSY)) {
		dev_dbg(video->dev, "Engine busy; don't start frame\n");
		return -EBUSY;
	}

	spin_lock_irqsave(&video->lock, flags);
	buf = list_first_entry_or_null(&video->buffers,
				       struct aspeed_video_buffer, link);
	if (!buf) {
		spin_unlock_irqrestore(&video->lock, flags);
		dev_dbg(video->dev, "No buffers; don't start frame\n");
		return -EPROTO;
	}

	set_bit(VIDEO_FRAME_INPRG, &video->flags);
	addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0);
	spin_unlock_irqrestore(&video->lock, flags);

	aspeed_video_write(video, VE_COMP_PROC_OFFSET, 0);
	aspeed_video_write(video, VE_COMP_OFFSET, 0);
	aspeed_video_write(video, VE_COMP_ADDR, addr);

	aspeed_video_update(video, VE_INTERRUPT_CTRL, 0,
			    VE_INTERRUPT_COMP_COMPLETE);

	aspeed_video_update(video, VE_SEQ_CTRL, 0,
			    VE_SEQ_CTRL_TRIG_CAPTURE | VE_SEQ_CTRL_TRIG_COMP);

	return 0;
}

static void aspeed_video_enable_mode_detect(struct aspeed_video *video)
{
	/* Enable mode detect interrupts */
	aspeed_video_update(video, VE_INTERRUPT_CTRL, 0,
			    VE_INTERRUPT_MODE_DETECT);

	/* Trigger mode detect */
	aspeed_video_update(video, VE_SEQ_CTRL, 0, VE_SEQ_CTRL_TRIG_MODE_DET);
}

static void aspeed_video_off(struct aspeed_video *video)
{
	if (!test_bit(VIDEO_CLOCKS_ON, &video->flags))
		return;

	/* Disable interrupts */
	aspeed_video_write(video, VE_INTERRUPT_CTRL, 0);
	aspeed_video_write(video, VE_INTERRUPT_STATUS, 0xffffffff);

	/* Turn off the relevant clocks */
	clk_disable(video->vclk);
	clk_disable(video->eclk);

	clear_bit(VIDEO_CLOCKS_ON, &video->flags);
}

static void aspeed_video_on(struct aspeed_video *video)
{
	if (test_bit(VIDEO_CLOCKS_ON, &video->flags))
		return;

	/* Turn on the relevant clocks */
	clk_enable(video->eclk);
	clk_enable(video->vclk);

	set_bit(VIDEO_CLOCKS_ON, &video->flags);
}

static void aspeed_video_bufs_done(struct aspeed_video *video,
				   enum vb2_buffer_state state)
{
	unsigned long flags;
	struct aspeed_video_buffer *buf;

	spin_lock_irqsave(&video->lock, flags);
	list_for_each_entry(buf, &video->buffers, link)
		vb2_buffer_done(&buf->vb.vb2_buf, state);
	INIT_LIST_HEAD(&video->buffers);
	spin_unlock_irqrestore(&video->lock, flags);
}

static void aspeed_video_irq_res_change(struct aspeed_video *video, ulong delay)
{
	dev_dbg(video->dev, "Resolution changed; resetting\n");

	set_bit(VIDEO_RES_CHANGE, &video->flags);
	clear_bit(VIDEO_FRAME_INPRG, &video->flags);

	aspeed_video_off(video);
	aspeed_video_bufs_done(video, VB2_BUF_STATE_ERROR);

	schedule_delayed_work(&video->res_work, delay);
}

static irqreturn_t aspeed_video_irq(int irq, void *arg)
{
	struct aspeed_video *video = arg;
	u32 sts = aspeed_video_read(video, VE_INTERRUPT_STATUS);

	/*
	 * Resolution changed or signal was lost; reset the engine and
	 * re-initialize
	 */
	if (sts & VE_INTERRUPT_MODE_DETECT_WD) {
		aspeed_video_irq_res_change(video, 0);
		return IRQ_HANDLED;
	}

	if (sts & VE_INTERRUPT_MODE_DETECT) {
		if (test_bit(VIDEO_RES_DETECT, &video->flags)) {
			aspeed_video_update(video, VE_INTERRUPT_CTRL,
					    VE_INTERRUPT_MODE_DETECT, 0);
			aspeed_video_write(video, VE_INTERRUPT_STATUS,
					   VE_INTERRUPT_MODE_DETECT);
			sts &= ~VE_INTERRUPT_MODE_DETECT;
			set_bit(VIDEO_MODE_DETECT_DONE, &video->flags);
			wake_up_interruptible_all(&video->wait);
		} else {
			/*
			 * Signal acquired while NOT doing resolution
			 * detection; reset the engine and re-initialize
			 */
			aspeed_video_irq_res_change(video,
						    RESOLUTION_CHANGE_DELAY);
			return IRQ_HANDLED;
		}
	}

	if (sts & VE_INTERRUPT_COMP_COMPLETE) {
		struct aspeed_video_buffer *buf;
		u32 frame_size = aspeed_video_read(video,
						   video->comp_size_read);

		spin_lock(&video->lock);
		clear_bit(VIDEO_FRAME_INPRG, &video->flags);
		buf = list_first_entry_or_null(&video->buffers,
					       struct aspeed_video_buffer,
					       link);
		if (buf) {
			vb2_set_plane_payload(&buf->vb.vb2_buf, 0, frame_size);

			if (!list_is_last(&buf->link, &video->buffers)) {
				buf->vb.vb2_buf.timestamp = ktime_get_ns();
				buf->vb.sequence = video->sequence++;
				buf->vb.field = V4L2_FIELD_NONE;
				vb2_buffer_done(&buf->vb.vb2_buf,
						VB2_BUF_STATE_DONE);
				list_del(&buf->link);
			}
		}
		spin_unlock(&video->lock);

		aspeed_video_update(video, VE_SEQ_CTRL,
				    VE_SEQ_CTRL_TRIG_CAPTURE |
				    VE_SEQ_CTRL_FORCE_IDLE |
				    VE_SEQ_CTRL_TRIG_COMP, 0);
		aspeed_video_update(video, VE_INTERRUPT_CTRL,
				    VE_INTERRUPT_COMP_COMPLETE, 0);
		aspeed_video_write(video, VE_INTERRUPT_STATUS,
				   VE_INTERRUPT_COMP_COMPLETE);
		sts &= ~VE_INTERRUPT_COMP_COMPLETE;
		if (test_bit(VIDEO_STREAMING, &video->flags) && buf)
			aspeed_video_start_frame(video);
	}

	/*
	 * CAPTURE_COMPLETE and FRAME_COMPLETE interrupts come even when these
	 * are disabled in the VE_INTERRUPT_CTRL register so clear them to
	 * prevent unnecessary interrupt calls.
	 */
	if (sts & VE_INTERRUPT_CAPTURE_COMPLETE)
		sts &= ~VE_INTERRUPT_CAPTURE_COMPLETE;
	if (sts & VE_INTERRUPT_FRAME_COMPLETE)
		sts &= ~VE_INTERRUPT_FRAME_COMPLETE;

	return sts ? IRQ_NONE : IRQ_HANDLED;
}

static void aspeed_video_check_and_set_polarity(struct aspeed_video *video)
{
	int i;
	int hsync_counter = 0;
	int vsync_counter = 0;
	u32 sts, ctrl;

	for (i = 0; i < NUM_POLARITY_CHECKS; ++i) {
		sts = aspeed_video_read(video, VE_MODE_DETECT_STATUS);
		if (sts & VE_MODE_DETECT_STATUS_VSYNC)
			vsync_counter--;
		else
			vsync_counter++;

		if (sts & VE_MODE_DETECT_STATUS_HSYNC)
			hsync_counter--;
		else
			hsync_counter++;
	}

	ctrl = aspeed_video_read(video, VE_CTRL);

	if (hsync_counter < 0) {
		ctrl |= VE_CTRL_HSYNC_POL;
		video->detected_timings.polarities &=
			~V4L2_DV_HSYNC_POS_POL;
	} else {
		ctrl &= ~VE_CTRL_HSYNC_POL;
		video->detected_timings.polarities |=
			V4L2_DV_HSYNC_POS_POL;
	}

	if (vsync_counter < 0) {
		ctrl |= VE_CTRL_VSYNC_POL;
		video->detected_timings.polarities &=
			~V4L2_DV_VSYNC_POS_POL;
	} else {
		ctrl &= ~VE_CTRL_VSYNC_POL;
		video->detected_timings.polarities |=
			V4L2_DV_VSYNC_POS_POL;
	}

	aspeed_video_write(video, VE_CTRL, ctrl);
}

static bool aspeed_video_alloc_buf(struct aspeed_video *video,
				   struct aspeed_video_addr *addr,
				   unsigned int size)
{
	addr->virt = dma_alloc_coherent(video->dev, size, &addr->dma,
					GFP_KERNEL);
	if (!addr->virt)
		return false;

	addr->size = size;
	return true;
}

static void aspeed_video_free_buf(struct aspeed_video *video,
				  struct aspeed_video_addr *addr)
{
	dma_free_coherent(video->dev, addr->size, addr->virt, addr->dma);
	addr->size = 0;
	addr->dma = 0ULL;
	addr->virt = NULL;
}

/*
 * Get the minimum HW-supported compression buffer size for the frame size.
 * Assume worst-case JPEG compression size is 1/8 raw size. This should be
 * plenty even for maximum quality; any worse and the engine will simply return
 * incomplete JPEGs.
 */
static void aspeed_video_calc_compressed_size(struct aspeed_video *video,
					      unsigned int frame_size)
{
	int i, j;
	u32 compression_buffer_size_reg = 0;
	unsigned int size;
	const unsigned int num_compression_packets = 4;
	const unsigned int compression_packet_size = 1024;
	const unsigned int max_compressed_size = frame_size / 2; /* 4bpp / 8 */

	video->max_compressed_size = UINT_MAX;

	for (i = 0; i < 6; ++i) {
		for (j = 0; j < 8; ++j) {
			size = (num_compression_packets << i) *
				(compression_packet_size << j);
			if (size < max_compressed_size)
				continue;

			if (size < video->max_compressed_size) {
				compression_buffer_size_reg = (i << 3) | j;
				video->max_compressed_size = size;
			}
		}
	}

	aspeed_video_write(video, VE_STREAM_BUF_SIZE,
			   compression_buffer_size_reg);

	dev_dbg(video->dev, "Max compressed size: %x\n",
		video->max_compressed_size);
}

#define res_check(v) test_and_clear_bit(VIDEO_MODE_DETECT_DONE, &(v)->flags)

static void aspeed_video_get_resolution(struct aspeed_video *video)
{
	bool invalid_resolution = true;
	int rc;
	int tries = 0;
	u32 mds;
	u32 src_lr_edge;
	u32 src_tb_edge;
	u32 sync;
	struct v4l2_bt_timings *det = &video->detected_timings;

	det->width = MIN_WIDTH;
	det->height = MIN_HEIGHT;
	video->v4l2_input_status = V4L2_IN_ST_NO_SIGNAL;

	do {
		if (tries) {
			set_current_state(TASK_INTERRUPTIBLE);
			if (schedule_timeout(INVALID_RESOLUTION_DELAY))
				return;
		}

		set_bit(VIDEO_RES_DETECT, &video->flags);
		aspeed_video_update(video, VE_CTRL,
				    VE_CTRL_VSYNC_POL | VE_CTRL_HSYNC_POL, 0);
		aspeed_video_enable_mode_detect(video);

		rc = wait_event_interruptible_timeout(video->wait,
						      res_check(video),
						      MODE_DETECT_TIMEOUT);
		if (!rc) {
			dev_dbg(video->dev, "Timed out; first mode detect\n");
			clear_bit(VIDEO_RES_DETECT, &video->flags);
			return;
		}

		/* Disable mode detect in order to re-trigger */
		aspeed_video_update(video, VE_SEQ_CTRL,
				    VE_SEQ_CTRL_TRIG_MODE_DET, 0);

		aspeed_video_check_and_set_polarity(video);

		aspeed_video_enable_mode_detect(video);

		rc = wait_event_interruptible_timeout(video->wait,
						      res_check(video),
						      MODE_DETECT_TIMEOUT);
		clear_bit(VIDEO_RES_DETECT, &video->flags);
		if (!rc) {
			dev_dbg(video->dev, "Timed out; second mode detect\n");
			return;
		}

		src_lr_edge = aspeed_video_read(video, VE_SRC_LR_EDGE_DET);
		src_tb_edge = aspeed_video_read(video, VE_SRC_TB_EDGE_DET);
		mds = aspeed_video_read(video, VE_MODE_DETECT_STATUS);
		sync = aspeed_video_read(video, VE_SYNC_STATUS);

		video->frame_bottom = (src_tb_edge & VE_SRC_TB_EDGE_DET_BOT) >>
			VE_SRC_TB_EDGE_DET_BOT_SHF;
		video->frame_top = src_tb_edge & VE_SRC_TB_EDGE_DET_TOP;
		det->vfrontporch = video->frame_top;
		det->vbackporch = ((mds & VE_MODE_DETECT_V_LINES) >>
			VE_MODE_DETECT_V_LINES_SHF) - video->frame_bottom;
		det->vsync = (sync & VE_SYNC_STATUS_VSYNC) >>
			VE_SYNC_STATUS_VSYNC_SHF;
		if (video->frame_top > video->frame_bottom)
			continue;

		video->frame_right = (src_lr_edge & VE_SRC_LR_EDGE_DET_RT) >>
			VE_SRC_LR_EDGE_DET_RT_SHF;
		video->frame_left = src_lr_edge & VE_SRC_LR_EDGE_DET_LEFT;
		det->hfrontporch = video->frame_left;
		det->hbackporch = (mds & VE_MODE_DETECT_H_PIXELS) -
			video->frame_right;
		det->hsync = sync & VE_SYNC_STATUS_HSYNC;
		if (video->frame_left > video->frame_right)
			continue;

		invalid_resolution = false;
	} while (invalid_resolution && (tries++ < INVALID_RESOLUTION_RETRIES));

	if (invalid_resolution) {
		dev_dbg(video->dev, "Invalid resolution detected\n");
		return;
	}

	det->height = (video->frame_bottom - video->frame_top) + 1;
	det->width = (video->frame_right - video->frame_left) + 1;
	video->v4l2_input_status = 0;

	/*
	 * Enable mode-detect watchdog, resolution-change watchdog and
	 * automatic compression after frame capture.
	 */
	aspeed_video_update(video, VE_INTERRUPT_CTRL, 0,
			    VE_INTERRUPT_MODE_DETECT_WD);
	aspeed_video_update(video, VE_SEQ_CTRL, 0,
			    VE_SEQ_CTRL_AUTO_COMP | VE_SEQ_CTRL_EN_WATCHDOG);

	dev_dbg(video->dev, "Got resolution: %dx%d\n", det->width,
		det->height);
}

static void aspeed_video_set_resolution(struct aspeed_video *video)
{
	struct v4l2_bt_timings *act = &video->active_timings;
	unsigned int size = act->width * act->height;

	/* Set capture/compression frame sizes */
	aspeed_video_calc_compressed_size(video, size);

	if (video->active_timings.width == 1680) {
		/*
		 * This is a workaround to fix a silicon bug on A1 and A2
		 * revisions. Since it doesn't break capturing operation of
		 * other revisions, use it for all revisions without checking
		 * the revision ID. It picked 1728 which is a very next
		 * 64-pixels aligned value to 1680 to minimize memory bandwidth
		 * and to get better access speed from video engine.
		 */
		aspeed_video_write(video, VE_CAP_WINDOW,
				   1728 << 16 | act->height);
		size += (1728 - 1680) * video->active_timings.height;
	} else {
		aspeed_video_write(video, VE_CAP_WINDOW,
				   act->width << 16 | act->height);
	}
	aspeed_video_write(video, VE_COMP_WINDOW,
			   act->width << 16 | act->height);
	aspeed_video_write(video, VE_SRC_SCANLINE_OFFSET, act->width * 4);

	/* Don't use direct mode below 1024 x 768 (irqs don't fire) */
	if (size < DIRECT_FETCH_THRESHOLD) {
		aspeed_video_write(video, VE_TGS_0,
				   FIELD_PREP(VE_TGS_FIRST,
					      video->frame_left - 1) |
				   FIELD_PREP(VE_TGS_LAST,
					      video->frame_right));
		aspeed_video_write(video, VE_TGS_1,
				   FIELD_PREP(VE_TGS_FIRST, video->frame_top) |
				   FIELD_PREP(VE_TGS_LAST,
					      video->frame_bottom + 1));
		aspeed_video_update(video, VE_CTRL, 0, VE_CTRL_INT_DE);
	} else {
		aspeed_video_update(video, VE_CTRL, 0, VE_CTRL_DIRECT_FETCH);
	}

	size *= 4;

	if (size != video->srcs[0].size) {
		if (video->srcs[0].size)
			aspeed_video_free_buf(video, &video->srcs[0]);
		if (video->srcs[1].size)
			aspeed_video_free_buf(video, &video->srcs[1]);

		if (!aspeed_video_alloc_buf(video, &video->srcs[0], size))
			goto err_mem;
		if (!aspeed_video_alloc_buf(video, &video->srcs[1], size))
			goto err_mem;

		aspeed_video_write(video, VE_SRC0_ADDR, video->srcs[0].dma);
		aspeed_video_write(video, VE_SRC1_ADDR, video->srcs[1].dma);
	}

	return;

err_mem:
	dev_err(video->dev, "Failed to allocate source buffers\n");

	if (video->srcs[0].size)
		aspeed_video_free_buf(video, &video->srcs[0]);
}

static void aspeed_video_init_regs(struct aspeed_video *video)
{
	u32 comp_ctrl = VE_COMP_CTRL_RSVD |
		FIELD_PREP(VE_COMP_CTRL_DCT_LUM, video->jpeg_quality) |
		FIELD_PREP(VE_COMP_CTRL_DCT_CHR, video->jpeg_quality | 0x10);
	u32 ctrl = VE_CTRL_AUTO_OR_CURSOR;
	u32 seq_ctrl = video->jpeg_mode;

	if (video->frame_rate)
		ctrl |= FIELD_PREP(VE_CTRL_FRC, video->frame_rate);

	if (video->yuv420)
		seq_ctrl |= VE_SEQ_CTRL_YUV420;

	/* Unlock VE registers */
	aspeed_video_write(video, VE_PROTECTION_KEY, VE_PROTECTION_KEY_UNLOCK);

	/* Disable interrupts */
	aspeed_video_write(video, VE_INTERRUPT_CTRL, 0);
	aspeed_video_write(video, VE_INTERRUPT_STATUS, 0xffffffff);

	/* Clear the offset */
	aspeed_video_write(video, VE_COMP_PROC_OFFSET, 0);
	aspeed_video_write(video, VE_COMP_OFFSET, 0);

	aspeed_video_write(video, VE_JPEG_ADDR, video->jpeg.dma);

	/* Set control registers */
	aspeed_video_write(video, VE_SEQ_CTRL, seq_ctrl);
	aspeed_video_write(video, VE_CTRL, ctrl);
	aspeed_video_write(video, VE_COMP_CTRL, comp_ctrl);

	/* Don't downscale */
	aspeed_video_write(video, VE_SCALING_FACTOR, 0x10001000);
	aspeed_video_write(video, VE_SCALING_FILTER0, 0x00200000);
	aspeed_video_write(video, VE_SCALING_FILTER1, 0x00200000);
	aspeed_video_write(video, VE_SCALING_FILTER2, 0x00200000);
	aspeed_video_write(video, VE_SCALING_FILTER3, 0x00200000);

	/* Set mode detection defaults */
	aspeed_video_write(video, VE_MODE_DETECT, 0x22666500);
}

static void aspeed_video_start(struct aspeed_video *video)
{
	aspeed_video_on(video);

	aspeed_video_init_regs(video);

	/* Resolution set to 640x480 if no signal found */
	aspeed_video_get_resolution(video);

	/* Set timings since the device is being opened for the first time */
	video->active_timings = video->detected_timings;
	aspeed_video_set_resolution(video);

	video->pix_fmt.width = video->active_timings.width;
	video->pix_fmt.height = video->active_timings.height;
	video->pix_fmt.sizeimage = video->max_compressed_size;
}

static void aspeed_video_stop(struct aspeed_video *video)
{
	set_bit(VIDEO_STOPPED, &video->flags);
	cancel_delayed_work_sync(&video->res_work);

	aspeed_video_off(video);

	if (video->srcs[0].size)
		aspeed_video_free_buf(video, &video->srcs[0]);

	if (video->srcs[1].size)
		aspeed_video_free_buf(video, &video->srcs[1]);

	video->v4l2_input_status = V4L2_IN_ST_NO_SIGNAL;
	video->flags = 0;
}

static int aspeed_video_querycap(struct file *file, void *fh,
				 struct v4l2_capability *cap)
{
	strscpy(cap->driver, DEVICE_NAME, sizeof(cap->driver));
	strscpy(cap->card, "Aspeed Video Engine", sizeof(cap->card));
	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
		 DEVICE_NAME);

	return 0;
}

static int aspeed_video_enum_format(struct file *file, void *fh,
				    struct v4l2_fmtdesc *f)
{
	if (f->index)
		return -EINVAL;

	f->pixelformat = V4L2_PIX_FMT_JPEG;

	return 0;
}

static int aspeed_video_get_format(struct file *file, void *fh,
				   struct v4l2_format *f)
{
	struct aspeed_video *video = video_drvdata(file);

	f->fmt.pix = video->pix_fmt;

	return 0;
}

static int aspeed_video_enum_input(struct file *file, void *fh,
				   struct v4l2_input *inp)
{
	struct aspeed_video *video = video_drvdata(file);

	if (inp->index)
		return -EINVAL;

	strscpy(inp->name, "Host VGA capture", sizeof(inp->name));
	inp->type = V4L2_INPUT_TYPE_CAMERA;
	inp->capabilities = V4L2_IN_CAP_DV_TIMINGS;
	inp->status = video->v4l2_input_status;

	return 0;
}

static int aspeed_video_get_input(struct file *file, void *fh, unsigned int *i)
{
	*i = 0;

	return 0;
}

static int aspeed_video_set_input(struct file *file, void *fh, unsigned int i)
{
	if (i)
		return -EINVAL;

	return 0;
}

static int aspeed_video_get_parm(struct file *file, void *fh,
				 struct v4l2_streamparm *a)
{
	struct aspeed_video *video = video_drvdata(file);

	a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
	a->parm.capture.readbuffers = 3;
	a->parm.capture.timeperframe.numerator = 1;
	if (!video->frame_rate)
		a->parm.capture.timeperframe.denominator = MAX_FRAME_RATE;
	else
		a->parm.capture.timeperframe.denominator = video->frame_rate;

	return 0;
}

static int aspeed_video_set_parm(struct file *file, void *fh,
				 struct v4l2_streamparm *a)
{
	unsigned int frame_rate = 0;
	struct aspeed_video *video = video_drvdata(file);

	a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
	a->parm.capture.readbuffers = 3;

	if (a->parm.capture.timeperframe.numerator)
		frame_rate = a->parm.capture.timeperframe.denominator /
			a->parm.capture.timeperframe.numerator;

	if (!frame_rate || frame_rate > MAX_FRAME_RATE) {
		frame_rate = 0;
		a->parm.capture.timeperframe.denominator = MAX_FRAME_RATE;
		a->parm.capture.timeperframe.numerator = 1;
	}

	if (video->frame_rate != frame_rate) {
		video->frame_rate = frame_rate;
		aspeed_video_update(video, VE_CTRL, VE_CTRL_FRC,
				    FIELD_PREP(VE_CTRL_FRC, frame_rate));
	}

	return 0;
}

static int aspeed_video_enum_framesizes(struct file *file, void *fh,
					struct v4l2_frmsizeenum *fsize)
{
	struct aspeed_video *video = video_drvdata(file);

	if (fsize->index)
		return -EINVAL;

	if (fsize->pixel_format != V4L2_PIX_FMT_JPEG)
		return -EINVAL;

	fsize->discrete.width = video->pix_fmt.width;
	fsize->discrete.height = video->pix_fmt.height;
	fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;

	return 0;
}

static int aspeed_video_enum_frameintervals(struct file *file, void *fh,
					    struct v4l2_frmivalenum *fival)
{
	struct aspeed_video *video = video_drvdata(file);

	if (fival->index)
		return -EINVAL;

	if (fival->width != video->detected_timings.width ||
	    fival->height != video->detected_timings.height)
		return -EINVAL;

	if (fival->pixel_format != V4L2_PIX_FMT_JPEG)
		return -EINVAL;

	fival->type = V4L2_FRMIVAL_TYPE_CONTINUOUS;

	fival->stepwise.min.denominator = MAX_FRAME_RATE;
	fival->stepwise.min.numerator = 1;
	fival->stepwise.max.denominator = 1;
	fival->stepwise.max.numerator = 1;
	fival->stepwise.step = fival->stepwise.max;

	return 0;
}

static int aspeed_video_set_dv_timings(struct file *file, void *fh,
				       struct v4l2_dv_timings *timings)
{
	struct aspeed_video *video = video_drvdata(file);

	if (timings->bt.width == video->active_timings.width &&
	    timings->bt.height == video->active_timings.height)
		return 0;

	if (vb2_is_busy(&video->queue))
		return -EBUSY;

	video->active_timings = timings->bt;

	aspeed_video_set_resolution(video);

	video->pix_fmt.width = timings->bt.width;
	video->pix_fmt.height = timings->bt.height;
	video->pix_fmt.sizeimage = video->max_compressed_size;

	timings->type = V4L2_DV_BT_656_1120;

	return 0;
}

static int aspeed_video_get_dv_timings(struct file *file, void *fh,
				       struct v4l2_dv_timings *timings)
{
	struct aspeed_video *video = video_drvdata(file);

	timings->type = V4L2_DV_BT_656_1120;
	timings->bt = video->active_timings;

	return 0;
}

static int aspeed_video_query_dv_timings(struct file *file, void *fh,
					 struct v4l2_dv_timings *timings)
{
	int rc;
	struct aspeed_video *video = video_drvdata(file);

	/*
	 * This blocks only if the driver is currently in the process of
	 * detecting a new resolution; in the event of no signal or timeout
	 * this function is woken up.
	 */
	if (file->f_flags & O_NONBLOCK) {
		if (test_bit(VIDEO_RES_CHANGE, &video->flags))
			return -EAGAIN;
	} else {
		rc = wait_event_interruptible(video->wait,
					      !test_bit(VIDEO_RES_CHANGE,
							&video->flags));
		if (rc)
			return -EINTR;
	}

	timings->type = V4L2_DV_BT_656_1120;
	timings->bt = video->detected_timings;

	return video->v4l2_input_status ? -ENOLINK : 0;
}

static int aspeed_video_enum_dv_timings(struct file *file, void *fh,
					struct v4l2_enum_dv_timings *timings)
{
	return v4l2_enum_dv_timings_cap(timings, &aspeed_video_timings_cap,
					NULL, NULL);
}

static int aspeed_video_dv_timings_cap(struct file *file, void *fh,
				       struct v4l2_dv_timings_cap *cap)
{
	*cap = aspeed_video_timings_cap;

	return 0;
}

static int aspeed_video_sub_event(struct v4l2_fh *fh,
				  const struct v4l2_event_subscription *sub)
{
	switch (sub->type) {
	case V4L2_EVENT_SOURCE_CHANGE:
		return v4l2_src_change_event_subscribe(fh, sub);
	}

	return v4l2_ctrl_subscribe_event(fh, sub);
}

static const struct v4l2_ioctl_ops aspeed_video_ioctl_ops = {
	.vidioc_querycap = aspeed_video_querycap,

	.vidioc_enum_fmt_vid_cap = aspeed_video_enum_format,
	.vidioc_g_fmt_vid_cap = aspeed_video_get_format,
	.vidioc_s_fmt_vid_cap = aspeed_video_get_format,
	.vidioc_try_fmt_vid_cap = aspeed_video_get_format,

	.vidioc_reqbufs = vb2_ioctl_reqbufs,
	.vidioc_querybuf = vb2_ioctl_querybuf,
	.vidioc_qbuf = vb2_ioctl_qbuf,
	.vidioc_expbuf = vb2_ioctl_expbuf,
	.vidioc_dqbuf = vb2_ioctl_dqbuf,
	.vidioc_create_bufs = vb2_ioctl_create_bufs,
	.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
	.vidioc_streamon = vb2_ioctl_streamon,
	.vidioc_streamoff = vb2_ioctl_streamoff,

	.vidioc_enum_input = aspeed_video_enum_input,
	.vidioc_g_input = aspeed_video_get_input,
	.vidioc_s_input = aspeed_video_set_input,

	.vidioc_g_parm = aspeed_video_get_parm,
	.vidioc_s_parm = aspeed_video_set_parm,
	.vidioc_enum_framesizes = aspeed_video_enum_framesizes,
	.vidioc_enum_frameintervals = aspeed_video_enum_frameintervals,

	.vidioc_s_dv_timings = aspeed_video_set_dv_timings,
	.vidioc_g_dv_timings = aspeed_video_get_dv_timings,
	.vidioc_query_dv_timings = aspeed_video_query_dv_timings,
	.vidioc_enum_dv_timings = aspeed_video_enum_dv_timings,
	.vidioc_dv_timings_cap = aspeed_video_dv_timings_cap,

	.vidioc_subscribe_event = aspeed_video_sub_event,
	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};

static void aspeed_video_update_jpeg_quality(struct aspeed_video *video)
{
	u32 comp_ctrl = FIELD_PREP(VE_COMP_CTRL_DCT_LUM, video->jpeg_quality) |
		FIELD_PREP(VE_COMP_CTRL_DCT_CHR, video->jpeg_quality | 0x10);

	aspeed_video_update(video, VE_COMP_CTRL,
			    VE_COMP_CTRL_DCT_LUM | VE_COMP_CTRL_DCT_CHR,
			    comp_ctrl);
}

static void aspeed_video_update_subsampling(struct aspeed_video *video)
{
	if (video->jpeg.virt)
		aspeed_video_init_jpeg_table(video->jpeg.virt, video->yuv420);

	if (video->yuv420)
		aspeed_video_update(video, VE_SEQ_CTRL, 0, VE_SEQ_CTRL_YUV420);
	else
		aspeed_video_update(video, VE_SEQ_CTRL, VE_SEQ_CTRL_YUV420, 0);
}

static int aspeed_video_set_ctrl(struct v4l2_ctrl *ctrl)
{
	struct aspeed_video *video = container_of(ctrl->handler,
						  struct aspeed_video,
						  ctrl_handler);

	switch (ctrl->id) {
	case V4L2_CID_JPEG_COMPRESSION_QUALITY:
		video->jpeg_quality = ctrl->val;
		aspeed_video_update_jpeg_quality(video);
		break;
	case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
		if (ctrl->val == V4L2_JPEG_CHROMA_SUBSAMPLING_420) {
			video->yuv420 = true;
			aspeed_video_update_subsampling(video);
		} else {
			video->yuv420 = false;
			aspeed_video_update_subsampling(video);
		}
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static const struct v4l2_ctrl_ops aspeed_video_ctrl_ops = {
	.s_ctrl = aspeed_video_set_ctrl,
};

static void aspeed_video_resolution_work(struct work_struct *work)
{
	struct delayed_work *dwork = to_delayed_work(work);
	struct aspeed_video *video = container_of(dwork, struct aspeed_video,
						  res_work);
	u32 input_status = video->v4l2_input_status;

	aspeed_video_on(video);

	/* Exit early in case no clients remain */
	if (test_bit(VIDEO_STOPPED, &video->flags))
		goto done;

	aspeed_video_init_regs(video);

	aspeed_video_get_resolution(video);

	if (video->detected_timings.width != video->active_timings.width ||
	    video->detected_timings.height != video->active_timings.height ||
	    input_status != video->v4l2_input_status) {
		static const struct v4l2_event ev = {
			.type = V4L2_EVENT_SOURCE_CHANGE,
			.u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
		};

		v4l2_event_queue(&video->vdev, &ev);
	} else if (test_bit(VIDEO_STREAMING, &video->flags)) {
		/* No resolution change so just restart streaming */
		aspeed_video_start_frame(video);
	}

done:
	clear_bit(VIDEO_RES_CHANGE, &video->flags);
	wake_up_interruptible_all(&video->wait);
}

static int aspeed_video_open(struct file *file)
{
	int rc;
	struct aspeed_video *video = video_drvdata(file);

	mutex_lock(&video->video_lock);

	rc = v4l2_fh_open(file);
	if (rc) {
		mutex_unlock(&video->video_lock);
		return rc;
	}

	if (v4l2_fh_is_singular_file(file))
		aspeed_video_start(video);

	mutex_unlock(&video->video_lock);

	return 0;
}

static int aspeed_video_release(struct file *file)
{
	int rc;
	struct aspeed_video *video = video_drvdata(file);

	mutex_lock(&video->video_lock);

	if (v4l2_fh_is_singular_file(file))
		aspeed_video_stop(video);

	rc = _vb2_fop_release(file, NULL);

	mutex_unlock(&video->video_lock);

	return rc;
}

static const struct v4l2_file_operations aspeed_video_v4l2_fops = {
	.owner = THIS_MODULE,
	.read = vb2_fop_read,
	.poll = vb2_fop_poll,
	.unlocked_ioctl = video_ioctl2,
	.mmap = vb2_fop_mmap,
	.open = aspeed_video_open,
	.release = aspeed_video_release,
};

static int aspeed_video_queue_setup(struct vb2_queue *q,
				    unsigned int *num_buffers,
				    unsigned int *num_planes,
				    unsigned int sizes[],
				    struct device *alloc_devs[])
{
	struct aspeed_video *video = vb2_get_drv_priv(q);

	if (*num_planes) {
		if (sizes[0] < video->max_compressed_size)
			return -EINVAL;

		return 0;
	}

	*num_planes = 1;
	sizes[0] = video->max_compressed_size;

	return 0;
}

static int aspeed_video_buf_prepare(struct vb2_buffer *vb)
{
	struct aspeed_video *video = vb2_get_drv_priv(vb->vb2_queue);

	if (vb2_plane_size(vb, 0) < video->max_compressed_size)
		return -EINVAL;

	return 0;
}

static int aspeed_video_start_streaming(struct vb2_queue *q,
					unsigned int count)
{
	int rc;
	struct aspeed_video *video = vb2_get_drv_priv(q);

	video->sequence = 0;

	rc = aspeed_video_start_frame(video);
	if (rc) {
		aspeed_video_bufs_done(video, VB2_BUF_STATE_QUEUED);
		return rc;
	}

	set_bit(VIDEO_STREAMING, &video->flags);
	return 0;
}

static void aspeed_video_stop_streaming(struct vb2_queue *q)
{
	int rc;
	struct aspeed_video *video = vb2_get_drv_priv(q);

	clear_bit(VIDEO_STREAMING, &video->flags);

	rc = wait_event_timeout(video->wait,
				!test_bit(VIDEO_FRAME_INPRG, &video->flags),
				STOP_TIMEOUT);
	if (!rc) {
		dev_dbg(video->dev, "Timed out when stopping streaming\n");

		/*
		 * Need to force stop any DMA and try and get HW into a good
		 * state for future calls to start streaming again.
		 */
		aspeed_video_off(video);
		aspeed_video_on(video);

		aspeed_video_init_regs(video);

		aspeed_video_get_resolution(video);
	}

	aspeed_video_bufs_done(video, VB2_BUF_STATE_ERROR);
}

static void aspeed_video_buf_queue(struct vb2_buffer *vb)
{
	bool empty;
	struct aspeed_video *video = vb2_get_drv_priv(vb->vb2_queue);
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct aspeed_video_buffer *avb = to_aspeed_video_buffer(vbuf);
	unsigned long flags;

	spin_lock_irqsave(&video->lock, flags);
	empty = list_empty(&video->buffers);
	list_add_tail(&avb->link, &video->buffers);
	spin_unlock_irqrestore(&video->lock, flags);

	if (test_bit(VIDEO_STREAMING, &video->flags) &&
	    !test_bit(VIDEO_FRAME_INPRG, &video->flags) && empty)
		aspeed_video_start_frame(video);
}

static const struct vb2_ops aspeed_video_vb2_ops = {
	.queue_setup = aspeed_video_queue_setup,
	.wait_prepare = vb2_ops_wait_prepare,
	.wait_finish = vb2_ops_wait_finish,
	.buf_prepare = aspeed_video_buf_prepare,
	.start_streaming = aspeed_video_start_streaming,
	.stop_streaming = aspeed_video_stop_streaming,
	.buf_queue =  aspeed_video_buf_queue,
};

static int aspeed_video_setup_video(struct aspeed_video *video)
{
	const u64 mask = ~(BIT(V4L2_JPEG_CHROMA_SUBSAMPLING_444) |
			   BIT(V4L2_JPEG_CHROMA_SUBSAMPLING_420));
	struct v4l2_device *v4l2_dev = &video->v4l2_dev;
	struct vb2_queue *vbq = &video->queue;
	struct video_device *vdev = &video->vdev;
	int rc;

	video->pix_fmt.pixelformat = V4L2_PIX_FMT_JPEG;
	video->pix_fmt.field = V4L2_FIELD_NONE;
	video->pix_fmt.colorspace = V4L2_COLORSPACE_SRGB;
	video->pix_fmt.quantization = V4L2_QUANTIZATION_FULL_RANGE;
	video->v4l2_input_status = V4L2_IN_ST_NO_SIGNAL;

	rc = v4l2_device_register(video->dev, v4l2_dev);
	if (rc) {
		dev_err(video->dev, "Failed to register v4l2 device\n");
		return rc;
	}

	v4l2_ctrl_handler_init(&video->ctrl_handler, 2);
	v4l2_ctrl_new_std(&video->ctrl_handler, &aspeed_video_ctrl_ops,
			  V4L2_CID_JPEG_COMPRESSION_QUALITY, 0,
			  ASPEED_VIDEO_JPEG_NUM_QUALITIES - 1, 1, 0);
	v4l2_ctrl_new_std_menu(&video->ctrl_handler, &aspeed_video_ctrl_ops,
			       V4L2_CID_JPEG_CHROMA_SUBSAMPLING,
			       V4L2_JPEG_CHROMA_SUBSAMPLING_420, mask,
			       V4L2_JPEG_CHROMA_SUBSAMPLING_444);

	rc = video->ctrl_handler.error;
	if (rc) {
		v4l2_ctrl_handler_free(&video->ctrl_handler);
		v4l2_device_unregister(v4l2_dev);

		dev_err(video->dev, "Failed to init controls: %d\n", rc);
		return rc;
	}

	v4l2_dev->ctrl_handler = &video->ctrl_handler;

	vbq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	vbq->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
	vbq->dev = v4l2_dev->dev;
	vbq->lock = &video->video_lock;
	vbq->ops = &aspeed_video_vb2_ops;
	vbq->mem_ops = &vb2_dma_contig_memops;
	vbq->drv_priv = video;
	vbq->buf_struct_size = sizeof(struct aspeed_video_buffer);
	vbq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
	vbq->min_buffers_needed = 3;

	rc = vb2_queue_init(vbq);
	if (rc) {
		v4l2_ctrl_handler_free(&video->ctrl_handler);
		v4l2_device_unregister(v4l2_dev);

		dev_err(video->dev, "Failed to init vb2 queue\n");
		return rc;
	}

	vdev->queue = vbq;
	vdev->fops = &aspeed_video_v4l2_fops;
	vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
		V4L2_CAP_STREAMING;
	vdev->v4l2_dev = v4l2_dev;
	strscpy(vdev->name, DEVICE_NAME, sizeof(vdev->name));
	vdev->vfl_type = VFL_TYPE_VIDEO;
	vdev->vfl_dir = VFL_DIR_RX;
	vdev->release = video_device_release_empty;
	vdev->ioctl_ops = &aspeed_video_ioctl_ops;
	vdev->lock = &video->video_lock;

	video_set_drvdata(vdev, video);
	rc = video_register_device(vdev, VFL_TYPE_VIDEO, 0);
	if (rc) {
		v4l2_ctrl_handler_free(&video->ctrl_handler);
		v4l2_device_unregister(v4l2_dev);

		dev_err(video->dev, "Failed to register video device\n");
		return rc;
	}

	return 0;
}

static int aspeed_video_init(struct aspeed_video *video)
{
	int irq;
	int rc;
	struct device *dev = video->dev;

	irq = irq_of_parse_and_map(dev->of_node, 0);
	if (!irq) {
		dev_err(dev, "Unable to find IRQ\n");
		return -ENODEV;
	}

	rc = devm_request_threaded_irq(dev, irq, NULL, aspeed_video_irq,
				       IRQF_ONESHOT, DEVICE_NAME, video);
	if (rc < 0) {
		dev_err(dev, "Unable to request IRQ %d\n", irq);
		return rc;
	}

	video->eclk = devm_clk_get(dev, "eclk");
	if (IS_ERR(video->eclk)) {
		dev_err(dev, "Unable to get ECLK\n");
		return PTR_ERR(video->eclk);
	}

	rc = clk_prepare(video->eclk);
	if (rc)
		return rc;

	video->vclk = devm_clk_get(dev, "vclk");
	if (IS_ERR(video->vclk)) {
		dev_err(dev, "Unable to get VCLK\n");
		rc = PTR_ERR(video->vclk);
		goto err_unprepare_eclk;
	}

	rc = clk_prepare(video->vclk);
	if (rc)
		goto err_unprepare_eclk;

	of_reserved_mem_device_init(dev);

	rc = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
	if (rc) {
		dev_err(dev, "Failed to set DMA mask\n");
		goto err_release_reserved_mem;
	}

	if (!aspeed_video_alloc_buf(video, &video->jpeg,
				    VE_JPEG_HEADER_SIZE)) {
		dev_err(dev, "Failed to allocate DMA for JPEG header\n");
		rc = -ENOMEM;
		goto err_release_reserved_mem;
	}

	aspeed_video_init_jpeg_table(video->jpeg.virt, video->yuv420);

	return 0;

err_release_reserved_mem:
	of_reserved_mem_device_release(dev);
	clk_unprepare(video->vclk);
err_unprepare_eclk:
	clk_unprepare(video->eclk);

	return rc;
}

static const struct of_device_id aspeed_video_of_match[] = {
	{ .compatible = "aspeed,ast2400-video-engine", .data = &ast2400_config },
	{ .compatible = "aspeed,ast2500-video-engine", .data = &ast2500_config },
	{ .compatible = "aspeed,ast2600-video-engine", .data = &ast2600_config },
	{}
};
MODULE_DEVICE_TABLE(of, aspeed_video_of_match);

static int aspeed_video_probe(struct platform_device *pdev)
{
	const struct aspeed_video_config *config;
	const struct of_device_id *match;
	struct aspeed_video *video;
	int rc;

	video = devm_kzalloc(&pdev->dev, sizeof(*video), GFP_KERNEL);
	if (!video)
		return -ENOMEM;

	video->base = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(video->base))
		return PTR_ERR(video->base);

	match = of_match_node(aspeed_video_of_match, pdev->dev.of_node);
	if (!match)
		return -EINVAL;

	config = match->data;
	video->jpeg_mode = config->jpeg_mode;
	video->comp_size_read = config->comp_size_read;

	video->frame_rate = 30;
	video->dev = &pdev->dev;
	spin_lock_init(&video->lock);
	mutex_init(&video->video_lock);
	init_waitqueue_head(&video->wait);
	INIT_DELAYED_WORK(&video->res_work, aspeed_video_resolution_work);
	INIT_LIST_HEAD(&video->buffers);

	rc = aspeed_video_init(video);
	if (rc)
		return rc;

	rc = aspeed_video_setup_video(video);
	if (rc)
		return rc;

	return 0;
}

static int aspeed_video_remove(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
	struct aspeed_video *video = to_aspeed_video(v4l2_dev);

	aspeed_video_off(video);

	clk_unprepare(video->vclk);
	clk_unprepare(video->eclk);

	vb2_video_unregister_device(&video->vdev);

	v4l2_ctrl_handler_free(&video->ctrl_handler);

	v4l2_device_unregister(v4l2_dev);

	dma_free_coherent(video->dev, VE_JPEG_HEADER_SIZE, video->jpeg.virt,
			  video->jpeg.dma);

	of_reserved_mem_device_release(dev);

	return 0;
}

static struct platform_driver aspeed_video_driver = {
	.driver = {
		.name = DEVICE_NAME,
		.of_match_table = aspeed_video_of_match,
	},
	.probe = aspeed_video_probe,
	.remove = aspeed_video_remove,
};

module_platform_driver(aspeed_video_driver);

MODULE_DESCRIPTION("ASPEED Video Engine Driver");
MODULE_AUTHOR("Eddie James");
MODULE_LICENSE("GPL v2");