summaryrefslogtreecommitdiffstats
path: root/drivers/media/i2c/adv7511.c
blob: e4900df1140b9b10a729570aa075943e4beccee3 (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
/*
 * Analog Devices ADV7511 HDMI Transmitter Device Driver
 *
 * Copyright 2013 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */


#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/videodev2.h>
#include <linux/gpio.h>
#include <linux/workqueue.h>
#include <linux/hdmi.h>
#include <linux/v4l2-dv-timings.h>
#include <media/v4l2-device.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-dv-timings.h>
#include <media/adv7511.h>

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "debug level (0-2)");

MODULE_DESCRIPTION("Analog Devices ADV7511 HDMI Transmitter Device Driver");
MODULE_AUTHOR("Hans Verkuil");
MODULE_LICENSE("GPL v2");

#define MASK_ADV7511_EDID_RDY_INT   0x04
#define MASK_ADV7511_MSEN_INT       0x40
#define MASK_ADV7511_HPD_INT        0x80

#define MASK_ADV7511_HPD_DETECT     0x40
#define MASK_ADV7511_MSEN_DETECT    0x20
#define MASK_ADV7511_EDID_RDY       0x10

#define EDID_MAX_RETRIES (8)
#define EDID_DELAY 250
#define EDID_MAX_SEGM 8

#define ADV7511_MAX_WIDTH 1920
#define ADV7511_MAX_HEIGHT 1200
#define ADV7511_MIN_PIXELCLOCK 20000000
#define ADV7511_MAX_PIXELCLOCK 225000000

/*
**********************************************************************
*
*  Arrays with configuration parameters for the ADV7511
*
**********************************************************************
*/

struct i2c_reg_value {
	unsigned char reg;
	unsigned char value;
};

struct adv7511_state_edid {
	/* total number of blocks */
	u32 blocks;
	/* Number of segments read */
	u32 segments;
	u8 data[EDID_MAX_SEGM * 256];
	/* Number of EDID read retries left */
	unsigned read_retries;
	bool complete;
};

struct adv7511_state {
	struct adv7511_platform_data pdata;
	struct v4l2_subdev sd;
	struct media_pad pad;
	struct v4l2_ctrl_handler hdl;
	int chip_revision;
	u8 i2c_edid_addr;
	u8 i2c_cec_addr;
	u8 i2c_pktmem_addr;
	/* Is the adv7511 powered on? */
	bool power_on;
	/* Did we receive hotplug and rx-sense signals? */
	bool have_monitor;
	/* timings from s_dv_timings */
	struct v4l2_dv_timings dv_timings;
	u32 fmt_code;
	u32 colorspace;
	u32 ycbcr_enc;
	u32 quantization;
	u32 xfer_func;
	/* controls */
	struct v4l2_ctrl *hdmi_mode_ctrl;
	struct v4l2_ctrl *hotplug_ctrl;
	struct v4l2_ctrl *rx_sense_ctrl;
	struct v4l2_ctrl *have_edid0_ctrl;
	struct v4l2_ctrl *rgb_quantization_range_ctrl;
	struct i2c_client *i2c_edid;
	struct i2c_client *i2c_pktmem;
	struct adv7511_state_edid edid;
	/* Running counter of the number of detected EDIDs (for debugging) */
	unsigned edid_detect_counter;
	struct workqueue_struct *work_queue;
	struct delayed_work edid_handler; /* work entry */
};

static void adv7511_check_monitor_present_status(struct v4l2_subdev *sd);
static bool adv7511_check_edid_status(struct v4l2_subdev *sd);
static void adv7511_setup(struct v4l2_subdev *sd);
static int adv7511_s_i2s_clock_freq(struct v4l2_subdev *sd, u32 freq);
static int adv7511_s_clock_freq(struct v4l2_subdev *sd, u32 freq);


static const struct v4l2_dv_timings_cap adv7511_timings_cap = {
	.type = V4L2_DV_BT_656_1120,
	/* keep this initialization for compatibility with GCC < 4.4.6 */
	.reserved = { 0 },
	V4L2_INIT_BT_TIMINGS(0, ADV7511_MAX_WIDTH, 0, ADV7511_MAX_HEIGHT,
		ADV7511_MIN_PIXELCLOCK, ADV7511_MAX_PIXELCLOCK,
		V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT |
			V4L2_DV_BT_STD_GTF | V4L2_DV_BT_STD_CVT,
		V4L2_DV_BT_CAP_PROGRESSIVE | V4L2_DV_BT_CAP_REDUCED_BLANKING |
			V4L2_DV_BT_CAP_CUSTOM)
};

static inline struct adv7511_state *get_adv7511_state(struct v4l2_subdev *sd)
{
	return container_of(sd, struct adv7511_state, sd);
}

static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
	return &container_of(ctrl->handler, struct adv7511_state, hdl)->sd;
}

/* ------------------------ I2C ----------------------------------------------- */

static s32 adv_smbus_read_byte_data_check(struct i2c_client *client,
					  u8 command, bool check)
{
	union i2c_smbus_data data;

	if (!i2c_smbus_xfer(client->adapter, client->addr, client->flags,
			    I2C_SMBUS_READ, command,
			    I2C_SMBUS_BYTE_DATA, &data))
		return data.byte;
	if (check)
		v4l_err(client, "error reading %02x, %02x\n",
			client->addr, command);
	return -1;
}

static s32 adv_smbus_read_byte_data(struct i2c_client *client, u8 command)
{
	int i;
	for (i = 0; i < 3; i++) {
		int ret = adv_smbus_read_byte_data_check(client, command, true);
		if (ret >= 0) {
			if (i)
				v4l_err(client, "read ok after %d retries\n", i);
			return ret;
		}
	}
	v4l_err(client, "read failed\n");
	return -1;
}

static int adv7511_rd(struct v4l2_subdev *sd, u8 reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	return adv_smbus_read_byte_data(client, reg);
}

static int adv7511_wr(struct v4l2_subdev *sd, u8 reg, u8 val)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	int ret;
	int i;

	for (i = 0; i < 3; i++) {
		ret = i2c_smbus_write_byte_data(client, reg, val);
		if (ret == 0)
			return 0;
	}
	v4l2_err(sd, "%s: i2c write error\n", __func__);
	return ret;
}

/* To set specific bits in the register, a clear-mask is given (to be AND-ed),
   and then the value-mask (to be OR-ed). */
static inline void adv7511_wr_and_or(struct v4l2_subdev *sd, u8 reg, u8 clr_mask, u8 val_mask)
{
	adv7511_wr(sd, reg, (adv7511_rd(sd, reg) & clr_mask) | val_mask);
}

static int adv_smbus_read_i2c_block_data(struct i2c_client *client,
					 u8 command, unsigned length, u8 *values)
{
	union i2c_smbus_data data;
	int ret;

	if (length > I2C_SMBUS_BLOCK_MAX)
		length = I2C_SMBUS_BLOCK_MAX;
	data.block[0] = length;

	ret = i2c_smbus_xfer(client->adapter, client->addr, client->flags,
			     I2C_SMBUS_READ, command,
			     I2C_SMBUS_I2C_BLOCK_DATA, &data);
	memcpy(values, data.block + 1, length);
	return ret;
}

static inline void adv7511_edid_rd(struct v4l2_subdev *sd, u16 len, u8 *buf)
{
	struct adv7511_state *state = get_adv7511_state(sd);
	int i;
	int err = 0;

	v4l2_dbg(1, debug, sd, "%s:\n", __func__);

	for (i = 0; !err && i < len; i += I2C_SMBUS_BLOCK_MAX)
		err = adv_smbus_read_i2c_block_data(state->i2c_edid, i,
						    I2C_SMBUS_BLOCK_MAX, buf + i);
	if (err)
		v4l2_err(sd, "%s: i2c read error\n", __func__);
}

static int adv7511_pktmem_rd(struct v4l2_subdev *sd, u8 reg)
{
	struct adv7511_state *state = get_adv7511_state(sd);

	return adv_smbus_read_byte_data(state->i2c_pktmem, reg);
}

static int adv7511_pktmem_wr(struct v4l2_subdev *sd, u8 reg, u8 val)
{
	struct adv7511_state *state = get_adv7511_state(sd);
	int ret;
	int i;

	for (i = 0; i < 3; i++) {
		ret = i2c_smbus_write_byte_data(state->i2c_pktmem, reg, val);
		if (ret == 0)
			return 0;
	}
	v4l2_err(sd, "%s: i2c write error\n", __func__);
	return ret;
}

/* To set specific bits in the register, a clear-mask is given (to be AND-ed),
   and then the value-mask (to be OR-ed). */
static inline void adv7511_pktmem_wr_and_or(struct v4l2_subdev *sd, u8 reg, u8 clr_mask, u8 val_mask)
{
	adv7511_pktmem_wr(sd, reg, (adv7511_pktmem_rd(sd, reg) & clr_mask) | val_mask);
}

static inline bool adv7511_have_hotplug(struct v4l2_subdev *sd)
{
	return adv7511_rd(sd, 0x42) & MASK_ADV7511_HPD_DETECT;
}

static inline bool adv7511_have_rx_sense(struct v4l2_subdev *sd)
{
	return adv7511_rd(sd, 0x42) & MASK_ADV7511_MSEN_DETECT;
}

static void adv7511_csc_conversion_mode(struct v4l2_subdev *sd, u8 mode)
{
	adv7511_wr_and_or(sd, 0x18, 0x9f, (mode & 0x3)<<5);
}

static void adv7511_csc_coeff(struct v4l2_subdev *sd,
			      u16 A1, u16 A2, u16 A3, u16 A4,
			      u16 B1, u16 B2, u16 B3, u16 B4,
			      u16 C1, u16 C2, u16 C3, u16 C4)
{
	/* A */
	adv7511_wr_and_or(sd, 0x18, 0xe0, A1>>8);
	adv7511_wr(sd, 0x19, A1);
	adv7511_wr_and_or(sd, 0x1A, 0xe0, A2>>8);
	adv7511_wr(sd, 0x1B, A2);
	adv7511_wr_and_or(sd, 0x1c, 0xe0, A3>>8);
	adv7511_wr(sd, 0x1d, A3);
	adv7511_wr_and_or(sd, 0x1e, 0xe0, A4>>8);
	adv7511_wr(sd, 0x1f, A4);

	/* B */
	adv7511_wr_and_or(sd, 0x20, 0xe0, B1>>8);
	adv7511_wr(sd, 0x21, B1);
	adv7511_wr_and_or(sd, 0x22, 0xe0, B2>>8);
	adv7511_wr(sd, 0x23, B2);
	adv7511_wr_and_or(sd, 0x24, 0xe0, B3>>8);
	adv7511_wr(sd, 0x25, B3);
	adv7511_wr_and_or(sd, 0x26, 0xe0, B4>>8);
	adv7511_wr(sd, 0x27, B4);

	/* C */
	adv7511_wr_and_or(sd, 0x28, 0xe0, C1>>8);
	adv7511_wr(sd, 0x29, C1);
	adv7511_wr_and_or(sd, 0x2A, 0xe0, C2>>8);
	adv7511_wr(sd, 0x2B, C2);
	adv7511_wr_and_or(sd, 0x2C, 0xe0, C3>>8);
	adv7511_wr(sd, 0x2D, C3);
	adv7511_wr_and_or(sd, 0x2E, 0xe0, C4>>8);
	adv7511_wr(sd, 0x2F, C4);
}

static void adv7511_csc_rgb_full2limit(struct v4l2_subdev *sd, bool enable)
{
	if (enable) {
		u8 csc_mode = 0;
		adv7511_csc_conversion_mode(sd, csc_mode);
		adv7511_csc_coeff(sd,
				  4096-564, 0, 0, 256,
				  0, 4096-564, 0, 256,
				  0, 0, 4096-564, 256);
		/* enable CSC */
		adv7511_wr_and_or(sd, 0x18, 0x7f, 0x80);
		/* AVI infoframe: Limited range RGB (16-235) */
		adv7511_wr_and_or(sd, 0x57, 0xf3, 0x04);
	} else {
		/* disable CSC */
		adv7511_wr_and_or(sd, 0x18, 0x7f, 0x0);
		/* AVI infoframe: Full range RGB (0-255) */
		adv7511_wr_and_or(sd, 0x57, 0xf3, 0x08);
	}
}

static void adv7511_set_IT_content_AVI_InfoFrame(struct v4l2_subdev *sd)
{
	struct adv7511_state *state = get_adv7511_state(sd);
	if (state->dv_timings.bt.flags & V4L2_DV_FL_IS_CE_VIDEO) {
		/* CE format, not IT  */
		adv7511_wr_and_or(sd, 0x57, 0x7f, 0x00);
	} else {
		/* IT format */
		adv7511_wr_and_or(sd, 0x57, 0x7f, 0x80);
	}
}

static int adv7511_set_rgb_quantization_mode(struct v4l2_subdev *sd, struct v4l2_ctrl *ctrl)
{
	switch (ctrl->val) {
	default:
		return -EINVAL;
		break;
	case V4L2_DV_RGB_RANGE_AUTO: {
		/* automatic */
		struct adv7511_state *state = get_adv7511_state(sd);

		if (state->dv_timings.bt.flags & V4L2_DV_FL_IS_CE_VIDEO) {
			/* CE format, RGB limited range (16-235) */
			adv7511_csc_rgb_full2limit(sd, true);
		} else {
			/* not CE format, RGB full range (0-255) */
			adv7511_csc_rgb_full2limit(sd, false);
		}
	}
		break;
	case V4L2_DV_RGB_RANGE_LIMITED:
		/* RGB limited range (16-235) */
		adv7511_csc_rgb_full2limit(sd, true);
		break;
	case V4L2_DV_RGB_RANGE_FULL:
		/* RGB full range (0-255) */
		adv7511_csc_rgb_full2limit(sd, false);
		break;
	}
	return 0;
}

/* ------------------------------ CTRL OPS ------------------------------ */

static int adv7511_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct v4l2_subdev *sd = to_sd(ctrl);
	struct adv7511_state *state = get_adv7511_state(sd);

	v4l2_dbg(1, debug, sd, "%s: ctrl id: %d, ctrl->val %d\n", __func__, ctrl->id, ctrl->val);

	if (state->hdmi_mode_ctrl == ctrl) {
		/* Set HDMI or DVI-D */
		adv7511_wr_and_or(sd, 0xaf, 0xfd, ctrl->val == V4L2_DV_TX_MODE_HDMI ? 0x02 : 0x00);
		return 0;
	}
	if (state->rgb_quantization_range_ctrl == ctrl)
		return adv7511_set_rgb_quantization_mode(sd, ctrl);

	return -EINVAL;
}

static const struct v4l2_ctrl_ops adv7511_ctrl_ops = {
	.s_ctrl = adv7511_s_ctrl,
};

/* ---------------------------- CORE OPS ------------------------------------------- */

#ifdef CONFIG_VIDEO_ADV_DEBUG
static void adv7511_inv_register(struct v4l2_subdev *sd)
{
	v4l2_info(sd, "0x000-0x0ff: Main Map\n");
}

static int adv7511_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
{
	reg->size = 1;
	switch (reg->reg >> 8) {
	case 0:
		reg->val = adv7511_rd(sd, reg->reg & 0xff);
		break;
	default:
		v4l2_info(sd, "Register %03llx not supported\n", reg->reg);
		adv7511_inv_register(sd);
		break;
	}
	return 0;
}

static int adv7511_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
{
	switch (reg->reg >> 8) {
	case 0:
		adv7511_wr(sd, reg->reg & 0xff, reg->val & 0xff);
		break;
	default:
		v4l2_info(sd, "Register %03llx not supported\n", reg->reg);
		adv7511_inv_register(sd);
		break;
	}
	return 0;
}
#endif

struct adv7511_cfg_read_infoframe {
	const char *desc;
	u8 present_reg;
	u8 present_mask;
	u8 header[3];
	u16 payload_addr;
};

static u8 hdmi_infoframe_checksum(u8 *ptr, size_t size)
{
	u8 csum = 0;
	size_t i;

	/* compute checksum */
	for (i = 0; i < size; i++)
		csum += ptr[i];

	return 256 - csum;
}

static void log_infoframe(struct v4l2_subdev *sd, const struct adv7511_cfg_read_infoframe *cri)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	struct device *dev = &client->dev;
	union hdmi_infoframe frame;
	u8 buffer[32];
	u8 len;
	int i;

	if (!(adv7511_rd(sd, cri->present_reg) & cri->present_mask)) {
		v4l2_info(sd, "%s infoframe not transmitted\n", cri->desc);
		return;
	}

	memcpy(buffer, cri->header, sizeof(cri->header));

	len = buffer[2];

	if (len + 4 > sizeof(buffer)) {
		v4l2_err(sd, "%s: invalid %s infoframe length %d\n", __func__, cri->desc, len);
		return;
	}

	if (cri->payload_addr >= 0x100) {
		for (i = 0; i < len; i++)
			buffer[i + 4] = adv7511_pktmem_rd(sd, cri->payload_addr + i - 0x100);
	} else {
		for (i = 0; i < len; i++)
			buffer[i + 4] = adv7511_rd(sd, cri->payload_addr + i);
	}
	buffer[3] = 0;
	buffer[3] = hdmi_infoframe_checksum(buffer, len + 4);

	if (hdmi_infoframe_unpack(&frame, buffer) < 0) {
		v4l2_err(sd, "%s: unpack of %s infoframe failed\n", __func__, cri->desc);
		return;
	}

	hdmi_infoframe_log(KERN_INFO, dev, &frame);
}

static void adv7511_log_infoframes(struct v4l2_subdev *sd)
{
	static const struct adv7511_cfg_read_infoframe cri[] = {
		{ "AVI", 0x44, 0x10, { 0x82, 2, 13 }, 0x55 },
		{ "Audio", 0x44, 0x08, { 0x84, 1, 10 }, 0x73 },
		{ "SDP", 0x40, 0x40, { 0x83, 1, 25 }, 0x103 },
	};
	int i;

	for (i = 0; i < ARRAY_SIZE(cri); i++)
		log_infoframe(sd, &cri[i]);
}

static int adv7511_log_status(struct v4l2_subdev *sd)
{
	struct adv7511_state *state = get_adv7511_state(sd);
	struct adv7511_state_edid *edid = &state->edid;

	static const char * const states[] = {
		"in reset",
		"reading EDID",
		"idle",
		"initializing HDCP",
		"HDCP enabled",
		"initializing HDCP repeater",
		"6", "7", "8", "9", "A", "B", "C", "D", "E", "F"
	};
	static const char * const errors[] = {
		"no error",
		"bad receiver BKSV",
		"Ri mismatch",
		"Pj mismatch",
		"i2c error",
		"timed out",
		"max repeater cascade exceeded",
		"hash check failed",
		"too many devices",
		"9", "A", "B", "C", "D", "E", "F"
	};

	v4l2_info(sd, "power %s\n", state->power_on ? "on" : "off");
	v4l2_info(sd, "%s hotplug, %s Rx Sense, %s EDID (%d block(s))\n",
		  (adv7511_rd(sd, 0x42) & MASK_ADV7511_HPD_DETECT) ? "detected" : "no",
		  (adv7511_rd(sd, 0x42) & MASK_ADV7511_MSEN_DETECT) ? "detected" : "no",
		  edid->segments ? "found" : "no",
		  edid->blocks);
	v4l2_info(sd, "%s output %s\n",
		  (adv7511_rd(sd, 0xaf) & 0x02) ?
		  "HDMI" : "DVI-D",
		  (adv7511_rd(sd, 0xa1) & 0x3c) ?
		  "disabled" : "enabled");
	v4l2_info(sd, "state: %s, error: %s, detect count: %u, msk/irq: %02x/%02x\n",
			  states[adv7511_rd(sd, 0xc8) & 0xf],
			  errors[adv7511_rd(sd, 0xc8) >> 4], state->edid_detect_counter,
			  adv7511_rd(sd, 0x94), adv7511_rd(sd, 0x96));
	v4l2_info(sd, "RGB quantization: %s range\n", adv7511_rd(sd, 0x18) & 0x80 ? "limited" : "full");
	if (adv7511_rd(sd, 0xaf) & 0x02) {
		/* HDMI only */
		u8 manual_cts = adv7511_rd(sd, 0x0a) & 0x80;
		u32 N = (adv7511_rd(sd, 0x01) & 0xf) << 16 |
			adv7511_rd(sd, 0x02) << 8 |
			adv7511_rd(sd, 0x03);
		u8 vic_detect = adv7511_rd(sd, 0x3e) >> 2;
		u8 vic_sent = adv7511_rd(sd, 0x3d) & 0x3f;
		u32 CTS;

		if (manual_cts)
			CTS = (adv7511_rd(sd, 0x07) & 0xf) << 16 |
			      adv7511_rd(sd, 0x08) << 8 |
			      adv7511_rd(sd, 0x09);
		else
			CTS = (adv7511_rd(sd, 0x04) & 0xf) << 16 |
			      adv7511_rd(sd, 0x05) << 8 |
			      adv7511_rd(sd, 0x06);
		v4l2_info(sd, "CTS %s mode: N %d, CTS %d\n",
			  manual_cts ? "manual" : "automatic", N, CTS);
		v4l2_info(sd, "VIC: detected %d, sent %d\n",
			  vic_detect, vic_sent);
		adv7511_log_infoframes(sd);
	}
	if (state->dv_timings.type == V4L2_DV_BT_656_1120)
		v4l2_print_dv_timings(sd->name, "timings: ",
				&state->dv_timings, false);
	else
		v4l2_info(sd, "no timings set\n");
	v4l2_info(sd, "i2c edid addr: 0x%x\n", state->i2c_edid_addr);
	v4l2_info(sd, "i2c cec addr: 0x%x\n", state->i2c_cec_addr);
	v4l2_info(sd, "i2c pktmem addr: 0x%x\n", state->i2c_pktmem_addr);
	return 0;
}

/* Power up/down adv7511 */
static int adv7511_s_power(struct v4l2_subdev *sd, int on)
{
	struct adv7511_state *state = get_adv7511_state(sd);
	const int retries = 20;
	int i;

	v4l2_dbg(1, debug, sd, "%s: power %s\n", __func__, on ? "on" : "off");

	state->power_on = on;

	if (!on) {
		/* Power down */
		adv7511_wr_and_or(sd, 0x41, 0xbf, 0x40);
		return true;
	}

	/* Power up */
	/* The adv7511 does not always come up immediately.
	   Retry multiple times. */
	for (i = 0; i < retries; i++) {
		adv7511_wr_and_or(sd, 0x41, 0xbf, 0x0);
		if ((adv7511_rd(sd, 0x41) & 0x40) == 0)
			break;
		adv7511_wr_and_or(sd, 0x41, 0xbf, 0x40);
		msleep(10);
	}
	if (i == retries) {
		v4l2_dbg(1, debug, sd, "%s: failed to powerup the adv7511!\n", __func__);
		adv7511_s_power(sd, 0);
		return false;
	}
	if (i > 1)
		v4l2_dbg(1, debug, sd, "%s: needed %d retries to powerup the adv7511\n", __func__, i);

	/* Reserved registers that must be set */
	adv7511_wr(sd, 0x98, 0x03);
	adv7511_wr_and_or(sd, 0x9a, 0xfe, 0x70);
	adv7511_wr(sd, 0x9c, 0x30);
	adv7511_wr_and_or(sd, 0x9d, 0xfc, 0x01);
	adv7511_wr(sd, 0xa2, 0xa4);
	adv7511_wr(sd, 0xa3, 0xa4);
	adv7511_wr(sd, 0xe0, 0xd0);
	adv7511_wr(sd, 0xf9, 0x00);

	adv7511_wr(sd, 0x43, state->i2c_edid_addr);
	adv7511_wr(sd, 0x45, state->i2c_pktmem_addr);

	/* Set number of attempts to read the EDID */
	adv7511_wr(sd, 0xc9, 0xf);
	return true;
}

/* Enable interrupts */
static void adv7511_set_isr(struct v4l2_subdev *sd, bool enable)
{
	u8 irqs = MASK_ADV7511_HPD_INT | MASK_ADV7511_MSEN_INT;
	u8 irqs_rd;
	int retries = 100;

	v4l2_dbg(2, debug, sd, "%s: %s\n", __func__, enable ? "enable" : "disable");

	/* The datasheet says that the EDID ready interrupt should be
	   disabled if there is no hotplug. */
	if (!enable)
		irqs = 0;
	else if (adv7511_have_hotplug(sd))
		irqs |= MASK_ADV7511_EDID_RDY_INT;

	/*
	 * This i2c write can fail (approx. 1 in 1000 writes). But it
	 * is essential that this register is correct, so retry it
	 * multiple times.
	 *
	 * Note that the i2c write does not report an error, but the readback
	 * clearly shows the wrong value.
	 */
	do {
		adv7511_wr(sd, 0x94, irqs);
		irqs_rd = adv7511_rd(sd, 0x94);
	} while (retries-- && irqs_rd != irqs);

	if (irqs_rd == irqs)
		return;
	v4l2_err(sd, "Could not set interrupts: hw failure?\n");
}

/* Interrupt handler */
static int adv7511_isr(struct v4l2_subdev *sd, u32 status, bool *handled)
{
	u8 irq_status;

	/* disable interrupts to prevent a race condition */
	adv7511_set_isr(sd, false);
	irq_status = adv7511_rd(sd, 0x96);
	/* clear detected interrupts */
	adv7511_wr(sd, 0x96, irq_status);

	v4l2_dbg(1, debug, sd, "%s: irq 0x%x\n", __func__, irq_status);

	if (irq_status & (MASK_ADV7511_HPD_INT | MASK_ADV7511_MSEN_INT))
		adv7511_check_monitor_present_status(sd);
	if (irq_status & MASK_ADV7511_EDID_RDY_INT)
		adv7511_check_edid_status(sd);

	/* enable interrupts */
	adv7511_set_isr(sd, true);

	if (handled)
		*handled = true;
	return 0;
}

static const struct v4l2_subdev_core_ops adv7511_core_ops = {
	.log_status = adv7511_log_status,
#ifdef CONFIG_VIDEO_ADV_DEBUG
	.g_register = adv7511_g_register,
	.s_register = adv7511_s_register,
#endif
	.s_power = adv7511_s_power,
	.interrupt_service_routine = adv7511_isr,
};

/* ------------------------------ VIDEO OPS ------------------------------ */

/* Enable/disable adv7511 output */
static int adv7511_s_stream(struct v4l2_subdev *sd, int enable)
{
	struct adv7511_state *state = get_adv7511_state(sd);

	v4l2_dbg(1, debug, sd, "%s: %sable\n", __func__, (enable ? "en" : "dis"));
	adv7511_wr_and_or(sd, 0xa1, ~0x3c, (enable ? 0 : 0x3c));
	if (enable) {
		adv7511_check_monitor_present_status(sd);
	} else {
		adv7511_s_power(sd, 0);
		state->have_monitor = false;
	}
	return 0;
}

static int adv7511_s_dv_timings(struct v4l2_subdev *sd,
			       struct v4l2_dv_timings *timings)
{
	struct adv7511_state *state = get_adv7511_state(sd);

	v4l2_dbg(1, debug, sd, "%s:\n", __func__);

	/* quick sanity check */
	if (!v4l2_valid_dv_timings(timings, &adv7511_timings_cap, NULL, NULL))
		return -EINVAL;

	/* Fill the optional fields .standards and .flags in struct v4l2_dv_timings
	   if the format is one of the CEA or DMT timings. */
	v4l2_find_dv_timings_cap(timings, &adv7511_timings_cap, 0, NULL, NULL);

	timings->bt.flags &= ~V4L2_DV_FL_REDUCED_FPS;

	/* save timings */
	state->dv_timings = *timings;

	/* update quantization range based on new dv_timings */
	adv7511_set_rgb_quantization_mode(sd, state->rgb_quantization_range_ctrl);

	/* update AVI infoframe */
	adv7511_set_IT_content_AVI_InfoFrame(sd);

	return 0;
}

static int adv7511_g_dv_timings(struct v4l2_subdev *sd,
				struct v4l2_dv_timings *timings)
{
	struct adv7511_state *state = get_adv7511_state(sd);

	v4l2_dbg(1, debug, sd, "%s:\n", __func__);

	if (!timings)
		return -EINVAL;

	*timings = state->dv_timings;

	return 0;
}

static int adv7511_enum_dv_timings(struct v4l2_subdev *sd,
				   struct v4l2_enum_dv_timings *timings)
{
	if (timings->pad != 0)
		return -EINVAL;

	return v4l2_enum_dv_timings_cap(timings, &adv7511_timings_cap, NULL, NULL);
}

static int adv7511_dv_timings_cap(struct v4l2_subdev *sd,
				  struct v4l2_dv_timings_cap *cap)
{
	if (cap->pad != 0)
		return -EINVAL;

	*cap = adv7511_timings_cap;
	return 0;
}

static const struct v4l2_subdev_video_ops adv7511_video_ops = {
	.s_stream = adv7511_s_stream,
	.s_dv_timings = adv7511_s_dv_timings,
	.g_dv_timings = adv7511_g_dv_timings,
};

/* ------------------------------ AUDIO OPS ------------------------------ */
static int adv7511_s_audio_stream(struct v4l2_subdev *sd, int enable)
{
	v4l2_dbg(1, debug, sd, "%s: %sable\n", __func__, (enable ? "en" : "dis"));

	if (enable)
		adv7511_wr_and_or(sd, 0x4b, 0x3f, 0x80);
	else
		adv7511_wr_and_or(sd, 0x4b, 0x3f, 0x40);

	return 0;
}

static int adv7511_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
{
	u32 N;

	switch (freq) {
	case 32000:  N = 4096;  break;
	case 44100:  N = 6272;  break;
	case 48000:  N = 6144;  break;
	case 88200:  N = 12544; break;
	case 96000:  N = 12288; break;
	case 176400: N = 25088; break;
	case 192000: N = 24576; break;
	default:
		return -EINVAL;
	}

	/* Set N (used with CTS to regenerate the audio clock) */
	adv7511_wr(sd, 0x01, (N >> 16) & 0xf);
	adv7511_wr(sd, 0x02, (N >> 8) & 0xff);
	adv7511_wr(sd, 0x03, N & 0xff);

	return 0;
}

static int adv7511_s_i2s_clock_freq(struct v4l2_subdev *sd, u32 freq)
{
	u32 i2s_sf;

	switch (freq) {
	case 32000:  i2s_sf = 0x30; break;
	case 44100:  i2s_sf = 0x00; break;
	case 48000:  i2s_sf = 0x20; break;
	case 88200:  i2s_sf = 0x80; break;
	case 96000:  i2s_sf = 0xa0; break;
	case 176400: i2s_sf = 0xc0; break;
	case 192000: i2s_sf = 0xe0; break;
	default:
		return -EINVAL;
	}

	/* Set sampling frequency for I2S audio to 48 kHz */
	adv7511_wr_and_or(sd, 0x15, 0xf, i2s_sf);

	return 0;
}

static int adv7511_s_routing(struct v4l2_subdev *sd, u32 input, u32 output, u32 config)
{
	/* Only 2 channels in use for application */
	adv7511_wr_and_or(sd, 0x73, 0xf8, 0x1);
	/* Speaker mapping */
	adv7511_wr(sd, 0x76, 0x00);

	/* 16 bit audio word length */
	adv7511_wr_and_or(sd, 0x14, 0xf0, 0x02);

	return 0;
}

static const struct v4l2_subdev_audio_ops adv7511_audio_ops = {
	.s_stream = adv7511_s_audio_stream,
	.s_clock_freq = adv7511_s_clock_freq,
	.s_i2s_clock_freq = adv7511_s_i2s_clock_freq,
	.s_routing = adv7511_s_routing,
};

/* ---------------------------- PAD OPS ------------------------------------- */

static int adv7511_get_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
{
	struct adv7511_state *state = get_adv7511_state(sd);

	memset(edid->reserved, 0, sizeof(edid->reserved));

	if (edid->pad != 0)
		return -EINVAL;

	if (edid->start_block == 0 && edid->blocks == 0) {
		edid->blocks = state->edid.segments * 2;
		return 0;
	}

	if (state->edid.segments == 0)
		return -ENODATA;

	if (edid->start_block >= state->edid.segments * 2)
		return -EINVAL;

	if (edid->start_block + edid->blocks > state->edid.segments * 2)
		edid->blocks = state->edid.segments * 2 - edid->start_block;

	memcpy(edid->edid, &state->edid.data[edid->start_block * 128],
			128 * edid->blocks);

	return 0;
}

static int adv7511_enum_mbus_code(struct v4l2_subdev *sd,
				  struct v4l2_subdev_pad_config *cfg,
				  struct v4l2_subdev_mbus_code_enum *code)
{
	if (code->pad != 0)
		return -EINVAL;

	switch (code->index) {
	case 0:
		code->code = MEDIA_BUS_FMT_RGB888_1X24;
		break;
	case 1:
		code->code = MEDIA_BUS_FMT_YUYV8_1X16;
		break;
	case 2:
		code->code = MEDIA_BUS_FMT_UYVY8_1X16;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static void adv7511_fill_format(struct adv7511_state *state,
				struct v4l2_mbus_framefmt *format)
{
	memset(format, 0, sizeof(*format));

	format->width = state->dv_timings.bt.width;
	format->height = state->dv_timings.bt.height;
	format->field = V4L2_FIELD_NONE;
}

static int adv7511_get_fmt(struct v4l2_subdev *sd,
			   struct v4l2_subdev_pad_config *cfg,
			   struct v4l2_subdev_format *format)
{
	struct adv7511_state *state = get_adv7511_state(sd);

	if (format->pad != 0)
		return -EINVAL;

	adv7511_fill_format(state, &format->format);

	if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
		struct v4l2_mbus_framefmt *fmt;

		fmt = v4l2_subdev_get_try_format(sd, cfg, format->pad);
		format->format.code = fmt->code;
		format->format.colorspace = fmt->colorspace;
		format->format.ycbcr_enc = fmt->ycbcr_enc;
		format->format.quantization = fmt->quantization;
		format->format.xfer_func = fmt->xfer_func;
	} else {
		format->format.code = state->fmt_code;
		format->format.colorspace = state->colorspace;
		format->format.ycbcr_enc = state->ycbcr_enc;
		format->format.quantization = state->quantization;
		format->format.xfer_func = state->xfer_func;
	}

	return 0;
}

static int adv7511_set_fmt(struct v4l2_subdev *sd,
			   struct v4l2_subdev_pad_config *cfg,
			   struct v4l2_subdev_format *format)
{
	struct adv7511_state *state = get_adv7511_state(sd);
	/*
	 * Bitfield namings come the CEA-861-F standard, table 8 "Auxiliary
	 * Video Information (AVI) InfoFrame Format"
	 *
	 * c = Colorimetry
	 * ec = Extended Colorimetry
	 * y = RGB or YCbCr
	 * q = RGB Quantization Range
	 * yq = YCC Quantization Range
	 */
	u8 c = HDMI_COLORIMETRY_NONE;
	u8 ec = HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
	u8 y = HDMI_COLORSPACE_RGB;
	u8 q = HDMI_QUANTIZATION_RANGE_DEFAULT;
	u8 yq = HDMI_YCC_QUANTIZATION_RANGE_LIMITED;

	if (format->pad != 0)
		return -EINVAL;
	switch (format->format.code) {
	case MEDIA_BUS_FMT_UYVY8_1X16:
	case MEDIA_BUS_FMT_YUYV8_1X16:
	case MEDIA_BUS_FMT_RGB888_1X24:
		break;
	default:
		return -EINVAL;
	}

	adv7511_fill_format(state, &format->format);
	if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
		struct v4l2_mbus_framefmt *fmt;

		fmt = v4l2_subdev_get_try_format(sd, cfg, format->pad);
		fmt->code = format->format.code;
		fmt->colorspace = format->format.colorspace;
		fmt->ycbcr_enc = format->format.ycbcr_enc;
		fmt->quantization = format->format.quantization;
		fmt->xfer_func = format->format.xfer_func;
		return 0;
	}

	switch (format->format.code) {
	case MEDIA_BUS_FMT_UYVY8_1X16:
		adv7511_wr_and_or(sd, 0x15, 0xf0, 0x01);
		adv7511_wr_and_or(sd, 0x16, 0x03, 0xb8);
		y = HDMI_COLORSPACE_YUV422;
		break;
	case MEDIA_BUS_FMT_YUYV8_1X16:
		adv7511_wr_and_or(sd, 0x15, 0xf0, 0x01);
		adv7511_wr_and_or(sd, 0x16, 0x03, 0xbc);
		y = HDMI_COLORSPACE_YUV422;
		break;
	case MEDIA_BUS_FMT_RGB888_1X24:
	default:
		adv7511_wr_and_or(sd, 0x15, 0xf0, 0x00);
		adv7511_wr_and_or(sd, 0x16, 0x03, 0x00);
		break;
	}
	state->fmt_code = format->format.code;
	state->colorspace = format->format.colorspace;
	state->ycbcr_enc = format->format.ycbcr_enc;
	state->quantization = format->format.quantization;
	state->xfer_func = format->format.xfer_func;

	switch (format->format.colorspace) {
	case V4L2_COLORSPACE_ADOBERGB:
		c = HDMI_COLORIMETRY_EXTENDED;
		ec = y ? HDMI_EXTENDED_COLORIMETRY_ADOBE_YCC_601 :
			 HDMI_EXTENDED_COLORIMETRY_ADOBE_RGB;
		break;
	case V4L2_COLORSPACE_SMPTE170M:
		c = y ? HDMI_COLORIMETRY_ITU_601 : HDMI_COLORIMETRY_NONE;
		if (y && format->format.ycbcr_enc == V4L2_YCBCR_ENC_XV601) {
			c = HDMI_COLORIMETRY_EXTENDED;
			ec = HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
		}
		break;
	case V4L2_COLORSPACE_REC709:
		c = y ? HDMI_COLORIMETRY_ITU_709 : HDMI_COLORIMETRY_NONE;
		if (y && format->format.ycbcr_enc == V4L2_YCBCR_ENC_XV709) {
			c = HDMI_COLORIMETRY_EXTENDED;
			ec = HDMI_EXTENDED_COLORIMETRY_XV_YCC_709;
		}
		break;
	case V4L2_COLORSPACE_SRGB:
		c = y ? HDMI_COLORIMETRY_EXTENDED : HDMI_COLORIMETRY_NONE;
		ec = y ? HDMI_EXTENDED_COLORIMETRY_S_YCC_601 :
			 HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
		break;
	case V4L2_COLORSPACE_BT2020:
		c = HDMI_COLORIMETRY_EXTENDED;
		if (y && format->format.ycbcr_enc == V4L2_YCBCR_ENC_BT2020_CONST_LUM)
			ec = 5; /* Not yet available in hdmi.h */
		else
			ec = 6; /* Not yet available in hdmi.h */
		break;
	default:
		break;
	}

	/*
	 * CEA-861-F says that for RGB formats the YCC range must match the
	 * RGB range, although sources should ignore the YCC range.
	 *
	 * The RGB quantization range shouldn't be non-zero if the EDID doesn't
	 * have the Q bit set in the Video Capabilities Data Block, however this
	 * isn't checked at the moment. The assumption is that the application
	 * knows the EDID and can detect this.
	 *
	 * The same is true for the YCC quantization range: non-standard YCC
	 * quantization ranges should only be sent if the EDID has the YQ bit
	 * set in the Video Capabilities Data Block.
	 */
	switch (format->format.quantization) {
	case V4L2_QUANTIZATION_FULL_RANGE:
		q = y ? HDMI_QUANTIZATION_RANGE_DEFAULT :
			HDMI_QUANTIZATION_RANGE_FULL;
		yq = q ? q - 1 : HDMI_YCC_QUANTIZATION_RANGE_FULL;
		break;
	case V4L2_QUANTIZATION_LIM_RANGE:
		q = y ? HDMI_QUANTIZATION_RANGE_DEFAULT :
			HDMI_QUANTIZATION_RANGE_LIMITED;
		yq = q ? q - 1 : HDMI_YCC_QUANTIZATION_RANGE_LIMITED;
		break;
	}

	adv7511_wr_and_or(sd, 0x4a, 0xbf, 0);
	adv7511_wr_and_or(sd, 0x55, 0x9f, y << 5);
	adv7511_wr_and_or(sd, 0x56, 0x3f, c << 6);
	adv7511_wr_and_or(sd, 0x57, 0x83, (ec << 4) | (q << 2));
	adv7511_wr_and_or(sd, 0x59, 0x0f, yq << 4);
	adv7511_wr_and_or(sd, 0x4a, 0xff, 1);

	return 0;
}

static const struct v4l2_subdev_pad_ops adv7511_pad_ops = {
	.get_edid = adv7511_get_edid,
	.enum_mbus_code = adv7511_enum_mbus_code,
	.get_fmt = adv7511_get_fmt,
	.set_fmt = adv7511_set_fmt,
	.enum_dv_timings = adv7511_enum_dv_timings,
	.dv_timings_cap = adv7511_dv_timings_cap,
};

/* --------------------- SUBDEV OPS --------------------------------------- */

static const struct v4l2_subdev_ops adv7511_ops = {
	.core  = &adv7511_core_ops,
	.pad  = &adv7511_pad_ops,
	.video = &adv7511_video_ops,
	.audio = &adv7511_audio_ops,
};

/* ----------------------------------------------------------------------- */
static void adv7511_dbg_dump_edid(int lvl, int debug, struct v4l2_subdev *sd, int segment, u8 *buf)
{
	if (debug >= lvl) {
		int i, j;
		v4l2_dbg(lvl, debug, sd, "edid segment %d\n", segment);
		for (i = 0; i < 256; i += 16) {
			u8 b[128];
			u8 *bp = b;
			if (i == 128)
				v4l2_dbg(lvl, debug, sd, "\n");
			for (j = i; j < i + 16; j++) {
				sprintf(bp, "0x%02x, ", buf[j]);
				bp += 6;
			}
			bp[0] = '\0';
			v4l2_dbg(lvl, debug, sd, "%s\n", b);
		}
	}
}

static void adv7511_edid_handler(struct work_struct *work)
{
	struct delayed_work *dwork = to_delayed_work(work);
	struct adv7511_state *state = container_of(dwork, struct adv7511_state, edid_handler);
	struct v4l2_subdev *sd = &state->sd;
	struct adv7511_edid_detect ed;

	v4l2_dbg(1, debug, sd, "%s:\n", __func__);

	if (adv7511_check_edid_status(sd)) {
		/* Return if we received the EDID. */
		return;
	}

	if (adv7511_have_hotplug(sd)) {
		/* We must retry reading the EDID several times, it is possible
		 * that initially the EDID couldn't be read due to i2c errors
		 * (DVI connectors are particularly prone to this problem). */
		if (state->edid.read_retries) {
			state->edid.read_retries--;
			v4l2_dbg(1, debug, sd, "%s: edid read failed\n", __func__);
			state->have_monitor = false;
			adv7511_s_power(sd, false);
			adv7511_s_power(sd, true);
			queue_delayed_work(state->work_queue, &state->edid_handler, EDID_DELAY);
			return;
		}
	}

	/* We failed to read the EDID, so send an event for this. */
	ed.present = false;
	ed.segment = adv7511_rd(sd, 0xc4);
	v4l2_subdev_notify(sd, ADV7511_EDID_DETECT, (void *)&ed);
	v4l2_dbg(1, debug, sd, "%s: no edid found\n", __func__);
}

static void adv7511_audio_setup(struct v4l2_subdev *sd)
{
	v4l2_dbg(1, debug, sd, "%s\n", __func__);

	adv7511_s_i2s_clock_freq(sd, 48000);
	adv7511_s_clock_freq(sd, 48000);
	adv7511_s_routing(sd, 0, 0, 0);
}

/* Configure hdmi transmitter. */
static void adv7511_setup(struct v4l2_subdev *sd)
{
	struct adv7511_state *state = get_adv7511_state(sd);
	v4l2_dbg(1, debug, sd, "%s\n", __func__);

	/* Input format: RGB 4:4:4 */
	adv7511_wr_and_or(sd, 0x15, 0xf0, 0x0);
	/* Output format: RGB 4:4:4 */
	adv7511_wr_and_or(sd, 0x16, 0x7f, 0x0);
	/* 1st order interpolation 4:2:2 -> 4:4:4 up conversion, Aspect ratio: 16:9 */
	adv7511_wr_and_or(sd, 0x17, 0xf9, 0x06);
	/* Disable pixel repetition */
	adv7511_wr_and_or(sd, 0x3b, 0x9f, 0x0);
	/* Disable CSC */
	adv7511_wr_and_or(sd, 0x18, 0x7f, 0x0);
	/* Output format: RGB 4:4:4, Active Format Information is valid,
	 * underscanned */
	adv7511_wr_and_or(sd, 0x55, 0x9c, 0x12);
	/* AVI Info frame packet enable, Audio Info frame disable */
	adv7511_wr_and_or(sd, 0x44, 0xe7, 0x10);
	/* Colorimetry, Active format aspect ratio: same as picure. */
	adv7511_wr(sd, 0x56, 0xa8);
	/* No encryption */
	adv7511_wr_and_or(sd, 0xaf, 0xed, 0x0);

	/* Positive clk edge capture for input video clock */
	adv7511_wr_and_or(sd, 0xba, 0x1f, 0x60);

	adv7511_audio_setup(sd);

	v4l2_ctrl_handler_setup(&state->hdl);
}

static void adv7511_notify_monitor_detect(struct v4l2_subdev *sd)
{
	struct adv7511_monitor_detect mdt;
	struct adv7511_state *state = get_adv7511_state(sd);

	mdt.present = state->have_monitor;
	v4l2_subdev_notify(sd, ADV7511_MONITOR_DETECT, (void *)&mdt);
}

static void adv7511_check_monitor_present_status(struct v4l2_subdev *sd)
{
	struct adv7511_state *state = get_adv7511_state(sd);
	/* read hotplug and rx-sense state */
	u8 status = adv7511_rd(sd, 0x42);

	v4l2_dbg(1, debug, sd, "%s: status: 0x%x%s%s\n",
			 __func__,
			 status,
			 status & MASK_ADV7511_HPD_DETECT ? ", hotplug" : "",
			 status & MASK_ADV7511_MSEN_DETECT ? ", rx-sense" : "");

	/* update read only ctrls */
	v4l2_ctrl_s_ctrl(state->hotplug_ctrl, adv7511_have_hotplug(sd) ? 0x1 : 0x0);
	v4l2_ctrl_s_ctrl(state->rx_sense_ctrl, adv7511_have_rx_sense(sd) ? 0x1 : 0x0);
	v4l2_ctrl_s_ctrl(state->have_edid0_ctrl, state->edid.segments ? 0x1 : 0x0);

	if ((status & MASK_ADV7511_HPD_DETECT) && ((status & MASK_ADV7511_MSEN_DETECT) || state->edid.segments)) {
		v4l2_dbg(1, debug, sd, "%s: hotplug and (rx-sense or edid)\n", __func__);
		if (!state->have_monitor) {
			v4l2_dbg(1, debug, sd, "%s: monitor detected\n", __func__);
			state->have_monitor = true;
			adv7511_set_isr(sd, true);
			if (!adv7511_s_power(sd, true)) {
				v4l2_dbg(1, debug, sd, "%s: monitor detected, powerup failed\n", __func__);
				return;
			}
			adv7511_setup(sd);
			adv7511_notify_monitor_detect(sd);
			state->edid.read_retries = EDID_MAX_RETRIES;
			queue_delayed_work(state->work_queue, &state->edid_handler, EDID_DELAY);
		}
	} else if (status & MASK_ADV7511_HPD_DETECT) {
		v4l2_dbg(1, debug, sd, "%s: hotplug detected\n", __func__);
		state->edid.read_retries = EDID_MAX_RETRIES;
		queue_delayed_work(state->work_queue, &state->edid_handler, EDID_DELAY);
	} else if (!(status & MASK_ADV7511_HPD_DETECT)) {
		v4l2_dbg(1, debug, sd, "%s: hotplug not detected\n", __func__);
		if (state->have_monitor) {
			v4l2_dbg(1, debug, sd, "%s: monitor not detected\n", __func__);
			state->have_monitor = false;
			adv7511_notify_monitor_detect(sd);
		}
		adv7511_s_power(sd, false);
		memset(&state->edid, 0, sizeof(struct adv7511_state_edid));
	}
}

static bool edid_block_verify_crc(u8 *edid_block)
{
	u8 sum = 0;
	int i;

	for (i = 0; i < 128; i++)
		sum += edid_block[i];
	return sum == 0;
}

static bool edid_verify_crc(struct v4l2_subdev *sd, u32 segment)
{
	struct adv7511_state *state = get_adv7511_state(sd);
	u32 blocks = state->edid.blocks;
	u8 *data = state->edid.data;

	if (!edid_block_verify_crc(&data[segment * 256]))
		return false;
	if ((segment + 1) * 2 <= blocks)
		return edid_block_verify_crc(&data[segment * 256 + 128]);
	return true;
}

static bool edid_verify_header(struct v4l2_subdev *sd, u32 segment)
{
	static const u8 hdmi_header[] = {
		0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
	};
	struct adv7511_state *state = get_adv7511_state(sd);
	u8 *data = state->edid.data;

	if (segment != 0)
		return true;
	return !memcmp(data, hdmi_header, sizeof(hdmi_header));
}

static bool adv7511_check_edid_status(struct v4l2_subdev *sd)
{
	struct adv7511_state *state = get_adv7511_state(sd);
	u8 edidRdy = adv7511_rd(sd, 0xc5);

	v4l2_dbg(1, debug, sd, "%s: edid ready (retries: %d)\n",
			 __func__, EDID_MAX_RETRIES - state->edid.read_retries);

	if (state->edid.complete)
		return true;

	if (edidRdy & MASK_ADV7511_EDID_RDY) {
		int segment = adv7511_rd(sd, 0xc4);
		struct adv7511_edid_detect ed;

		if (segment >= EDID_MAX_SEGM) {
			v4l2_err(sd, "edid segment number too big\n");
			return false;
		}
		v4l2_dbg(1, debug, sd, "%s: got segment %d\n", __func__, segment);
		adv7511_edid_rd(sd, 256, &state->edid.data[segment * 256]);
		adv7511_dbg_dump_edid(2, debug, sd, segment, &state->edid.data[segment * 256]);
		if (segment == 0) {
			state->edid.blocks = state->edid.data[0x7e] + 1;
			v4l2_dbg(1, debug, sd, "%s: %d blocks in total\n", __func__, state->edid.blocks);
		}
		if (!edid_verify_crc(sd, segment) ||
		    !edid_verify_header(sd, segment)) {
			/* edid crc error, force reread of edid segment */
			v4l2_err(sd, "%s: edid crc or header error\n", __func__);
			state->have_monitor = false;
			adv7511_s_power(sd, false);
			adv7511_s_power(sd, true);
			return false;
		}
		/* one more segment read ok */
		state->edid.segments = segment + 1;
		if (((state->edid.data[0x7e] >> 1) + 1) > state->edid.segments) {
			/* Request next EDID segment */
			v4l2_dbg(1, debug, sd, "%s: request segment %d\n", __func__, state->edid.segments);
			adv7511_wr(sd, 0xc9, 0xf);
			adv7511_wr(sd, 0xc4, state->edid.segments);
			state->edid.read_retries = EDID_MAX_RETRIES;
			queue_delayed_work(state->work_queue, &state->edid_handler, EDID_DELAY);
			return false;
		}

		v4l2_dbg(1, debug, sd, "%s: edid complete with %d segment(s)\n", __func__, state->edid.segments);
		state->edid.complete = true;

		/* report when we have all segments
		   but report only for segment 0
		 */
		ed.present = true;
		ed.segment = 0;
		state->edid_detect_counter++;
		v4l2_ctrl_s_ctrl(state->have_edid0_ctrl, state->edid.segments ? 0x1 : 0x0);
		v4l2_subdev_notify(sd, ADV7511_EDID_DETECT, (void *)&ed);
		return ed.present;
	}

	return false;
}

/* ----------------------------------------------------------------------- */
/* Setup ADV7511 */
static void adv7511_init_setup(struct v4l2_subdev *sd)
{
	struct adv7511_state *state = get_adv7511_state(sd);
	struct adv7511_state_edid *edid = &state->edid;

	v4l2_dbg(1, debug, sd, "%s\n", __func__);

	/* clear all interrupts */
	adv7511_wr(sd, 0x96, 0xff);
	/*
	 * Stop HPD from resetting a lot of registers.
	 * It might leave the chip in a partly un-initialized state,
	 * in particular with regards to hotplug bounces.
	 */
	adv7511_wr_and_or(sd, 0xd6, 0x3f, 0xc0);
	memset(edid, 0, sizeof(struct adv7511_state_edid));
	state->have_monitor = false;
	adv7511_set_isr(sd, false);
	adv7511_s_stream(sd, false);
	adv7511_s_audio_stream(sd, false);
}

static int adv7511_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
	struct adv7511_state *state;
	struct adv7511_platform_data *pdata = client->dev.platform_data;
	struct v4l2_ctrl_handler *hdl;
	struct v4l2_subdev *sd;
	u8 chip_id[2];
	int err = -EIO;

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -EIO;

	state = devm_kzalloc(&client->dev, sizeof(struct adv7511_state), GFP_KERNEL);
	if (!state)
		return -ENOMEM;

	/* Platform data */
	if (!pdata) {
		v4l_err(client, "No platform data!\n");
		return -ENODEV;
	}
	memcpy(&state->pdata, pdata, sizeof(state->pdata));
	state->fmt_code = MEDIA_BUS_FMT_RGB888_1X24;
	state->colorspace = V4L2_COLORSPACE_SRGB;

	sd = &state->sd;

	v4l2_dbg(1, debug, sd, "detecting adv7511 client on address 0x%x\n",
			 client->addr << 1);

	v4l2_i2c_subdev_init(sd, client, &adv7511_ops);

	hdl = &state->hdl;
	v4l2_ctrl_handler_init(hdl, 10);
	/* add in ascending ID order */
	state->hdmi_mode_ctrl = v4l2_ctrl_new_std_menu(hdl, &adv7511_ctrl_ops,
			V4L2_CID_DV_TX_MODE, V4L2_DV_TX_MODE_HDMI,
			0, V4L2_DV_TX_MODE_DVI_D);
	state->hotplug_ctrl = v4l2_ctrl_new_std(hdl, NULL,
			V4L2_CID_DV_TX_HOTPLUG, 0, 1, 0, 0);
	state->rx_sense_ctrl = v4l2_ctrl_new_std(hdl, NULL,
			V4L2_CID_DV_TX_RXSENSE, 0, 1, 0, 0);
	state->have_edid0_ctrl = v4l2_ctrl_new_std(hdl, NULL,
			V4L2_CID_DV_TX_EDID_PRESENT, 0, 1, 0, 0);
	state->rgb_quantization_range_ctrl =
		v4l2_ctrl_new_std_menu(hdl, &adv7511_ctrl_ops,
			V4L2_CID_DV_TX_RGB_RANGE, V4L2_DV_RGB_RANGE_FULL,
			0, V4L2_DV_RGB_RANGE_AUTO);
	sd->ctrl_handler = hdl;
	if (hdl->error) {
		err = hdl->error;
		goto err_hdl;
	}
	state->hdmi_mode_ctrl->is_private = true;
	state->hotplug_ctrl->is_private = true;
	state->rx_sense_ctrl->is_private = true;
	state->have_edid0_ctrl->is_private = true;
	state->rgb_quantization_range_ctrl->is_private = true;

	state->pad.flags = MEDIA_PAD_FL_SINK;
	err = media_entity_init(&sd->entity, 1, &state->pad, 0);
	if (err)
		goto err_hdl;

	/* EDID and CEC i2c addr */
	state->i2c_edid_addr = state->pdata.i2c_edid << 1;
	state->i2c_cec_addr = state->pdata.i2c_cec << 1;
	state->i2c_pktmem_addr = state->pdata.i2c_pktmem << 1;

	state->chip_revision = adv7511_rd(sd, 0x0);
	chip_id[0] = adv7511_rd(sd, 0xf5);
	chip_id[1] = adv7511_rd(sd, 0xf6);
	if (chip_id[0] != 0x75 || chip_id[1] != 0x11) {
		v4l2_err(sd, "chip_id != 0x7511, read 0x%02x%02x\n", chip_id[0], chip_id[1]);
		err = -EIO;
		goto err_entity;
	}

	state->i2c_edid = i2c_new_dummy(client->adapter, state->i2c_edid_addr >> 1);
	if (state->i2c_edid == NULL) {
		v4l2_err(sd, "failed to register edid i2c client\n");
		err = -ENOMEM;
		goto err_entity;
	}

	state->i2c_pktmem = i2c_new_dummy(client->adapter, state->i2c_pktmem_addr >> 1);
	if (state->i2c_pktmem == NULL) {
		v4l2_err(sd, "failed to register pktmem i2c client\n");
		err = -ENOMEM;
		goto err_unreg_edid;
	}

	adv7511_wr(sd, 0xe2, 0x01); /* power down cec section */
	state->work_queue = create_singlethread_workqueue(sd->name);
	if (state->work_queue == NULL) {
		v4l2_err(sd, "could not create workqueue\n");
		err = -ENOMEM;
		goto err_unreg_pktmem;
	}

	INIT_DELAYED_WORK(&state->edid_handler, adv7511_edid_handler);

	adv7511_init_setup(sd);
	adv7511_set_isr(sd, true);
	adv7511_check_monitor_present_status(sd);

	v4l2_info(sd, "%s found @ 0x%x (%s)\n", client->name,
			  client->addr << 1, client->adapter->name);
	return 0;

err_unreg_pktmem:
	i2c_unregister_device(state->i2c_pktmem);
err_unreg_edid:
	i2c_unregister_device(state->i2c_edid);
err_entity:
	media_entity_cleanup(&sd->entity);
err_hdl:
	v4l2_ctrl_handler_free(&state->hdl);
	return err;
}

/* ----------------------------------------------------------------------- */

static int adv7511_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct adv7511_state *state = get_adv7511_state(sd);

	state->chip_revision = -1;

	v4l2_dbg(1, debug, sd, "%s removed @ 0x%x (%s)\n", client->name,
		 client->addr << 1, client->adapter->name);

	adv7511_init_setup(sd);
	cancel_delayed_work(&state->edid_handler);
	i2c_unregister_device(state->i2c_edid);
	i2c_unregister_device(state->i2c_pktmem);
	destroy_workqueue(state->work_queue);
	v4l2_device_unregister_subdev(sd);
	media_entity_cleanup(&sd->entity);
	v4l2_ctrl_handler_free(sd->ctrl_handler);
	return 0;
}

/* ----------------------------------------------------------------------- */

static struct i2c_device_id adv7511_id[] = {
	{ "adv7511", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, adv7511_id);

static struct i2c_driver adv7511_driver = {
	.driver = {
		.name = "adv7511",
	},
	.probe = adv7511_probe,
	.remove = adv7511_remove,
	.id_table = adv7511_id,
};

module_i2c_driver(adv7511_driver);
OpenPOWER on IntegriCloud