summaryrefslogtreecommitdiffstats
path: root/drivers/video/hdmi.c
blob: e70792b3e367488667df008803bdf66d8c358ead (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
/*
 * Copyright (C) 2012 Avionic Design GmbH
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sub license,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * 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 NON-INFRINGEMENT. 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/bitops.h>
#include <linux/bug.h>
#include <linux/errno.h>
#include <linux/export.h>
#include <linux/hdmi.h>
#include <linux/string.h>
#include <linux/device.h>

#define hdmi_log(fmt, ...) dev_printk(level, dev, fmt, ##__VA_ARGS__)

static u8 hdmi_infoframe_checksum(const 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 hdmi_infoframe_set_checksum(void *buffer, size_t size)
{
	u8 *ptr = buffer;

	ptr[3] = hdmi_infoframe_checksum(buffer, size);
}

/**
 * hdmi_avi_infoframe_init() - initialize an HDMI AVI infoframe
 * @frame: HDMI AVI infoframe
 */
void hdmi_avi_infoframe_init(struct hdmi_avi_infoframe *frame)
{
	memset(frame, 0, sizeof(*frame));

	frame->type = HDMI_INFOFRAME_TYPE_AVI;
	frame->version = 2;
	frame->length = HDMI_AVI_INFOFRAME_SIZE;
}
EXPORT_SYMBOL(hdmi_avi_infoframe_init);

static int hdmi_avi_infoframe_check_only(const struct hdmi_avi_infoframe *frame)
{
	if (frame->type != HDMI_INFOFRAME_TYPE_AVI ||
	    frame->version != 2 ||
	    frame->length != HDMI_AVI_INFOFRAME_SIZE)
		return -EINVAL;

	if (frame->picture_aspect > HDMI_PICTURE_ASPECT_16_9)
		return -EINVAL;

	return 0;
}

/**
 * hdmi_avi_infoframe_check() - check a HDMI AVI infoframe
 * @frame: HDMI AVI infoframe
 *
 * Validates that the infoframe is consistent and updates derived fields
 * (eg. length) based on other fields.
 *
 * Returns 0 on success or a negative error code on failure.
 */
int hdmi_avi_infoframe_check(struct hdmi_avi_infoframe *frame)
{
	return hdmi_avi_infoframe_check_only(frame);
}
EXPORT_SYMBOL(hdmi_avi_infoframe_check);

/**
 * hdmi_avi_infoframe_pack_only() - write HDMI AVI infoframe to binary buffer
 * @frame: HDMI AVI infoframe
 * @buffer: destination buffer
 * @size: size of buffer
 *
 * Packs the information contained in the @frame structure into a binary
 * representation that can be written into the corresponding controller
 * registers. Also computes the checksum as required by section 5.3.5 of
 * the HDMI 1.4 specification.
 *
 * Returns the number of bytes packed into the binary buffer or a negative
 * error code on failure.
 */
ssize_t hdmi_avi_infoframe_pack_only(const struct hdmi_avi_infoframe *frame,
				     void *buffer, size_t size)
{
	u8 *ptr = buffer;
	size_t length;
	int ret;

	ret = hdmi_avi_infoframe_check_only(frame);
	if (ret)
		return ret;

	length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;

	if (size < length)
		return -ENOSPC;

	memset(buffer, 0, size);

	ptr[0] = frame->type;
	ptr[1] = frame->version;
	ptr[2] = frame->length;
	ptr[3] = 0; /* checksum */

	/* start infoframe payload */
	ptr += HDMI_INFOFRAME_HEADER_SIZE;

	ptr[0] = ((frame->colorspace & 0x3) << 5) | (frame->scan_mode & 0x3);

	/*
	 * Data byte 1, bit 4 has to be set if we provide the active format
	 * aspect ratio
	 */
	if (frame->active_aspect & 0xf)
		ptr[0] |= BIT(4);

	/* Bit 3 and 2 indicate if we transmit horizontal/vertical bar data */
	if (frame->top_bar || frame->bottom_bar)
		ptr[0] |= BIT(3);

	if (frame->left_bar || frame->right_bar)
		ptr[0] |= BIT(2);

	ptr[1] = ((frame->colorimetry & 0x3) << 6) |
		 ((frame->picture_aspect & 0x3) << 4) |
		 (frame->active_aspect & 0xf);

	ptr[2] = ((frame->extended_colorimetry & 0x7) << 4) |
		 ((frame->quantization_range & 0x3) << 2) |
		 (frame->nups & 0x3);

	if (frame->itc)
		ptr[2] |= BIT(7);

	ptr[3] = frame->video_code & 0x7f;

	ptr[4] = ((frame->ycc_quantization_range & 0x3) << 6) |
		 ((frame->content_type & 0x3) << 4) |
		 (frame->pixel_repeat & 0xf);

	ptr[5] = frame->top_bar & 0xff;
	ptr[6] = (frame->top_bar >> 8) & 0xff;
	ptr[7] = frame->bottom_bar & 0xff;
	ptr[8] = (frame->bottom_bar >> 8) & 0xff;
	ptr[9] = frame->left_bar & 0xff;
	ptr[10] = (frame->left_bar >> 8) & 0xff;
	ptr[11] = frame->right_bar & 0xff;
	ptr[12] = (frame->right_bar >> 8) & 0xff;

	hdmi_infoframe_set_checksum(buffer, length);

	return length;
}
EXPORT_SYMBOL(hdmi_avi_infoframe_pack_only);

/**
 * hdmi_avi_infoframe_pack() - check a HDMI AVI infoframe,
 *                             and write it to binary buffer
 * @frame: HDMI AVI infoframe
 * @buffer: destination buffer
 * @size: size of buffer
 *
 * Validates that the infoframe is consistent and updates derived fields
 * (eg. length) based on other fields, after which it packs the information
 * contained in the @frame structure into a binary representation that
 * can be written into the corresponding controller registers. This function
 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
 * specification.
 *
 * Returns the number of bytes packed into the binary buffer or a negative
 * error code on failure.
 */
ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame,
				void *buffer, size_t size)
{
	int ret;

	ret = hdmi_avi_infoframe_check(frame);
	if (ret)
		return ret;

	return hdmi_avi_infoframe_pack_only(frame, buffer, size);
}
EXPORT_SYMBOL(hdmi_avi_infoframe_pack);

/**
 * hdmi_spd_infoframe_init() - initialize an HDMI SPD infoframe
 * @frame: HDMI SPD infoframe
 * @vendor: vendor string
 * @product: product string
 *
 * Returns 0 on success or a negative error code on failure.
 */
int hdmi_spd_infoframe_init(struct hdmi_spd_infoframe *frame,
			    const char *vendor, const char *product)
{
	memset(frame, 0, sizeof(*frame));

	frame->type = HDMI_INFOFRAME_TYPE_SPD;
	frame->version = 1;
	frame->length = HDMI_SPD_INFOFRAME_SIZE;

	strncpy(frame->vendor, vendor, sizeof(frame->vendor));
	strncpy(frame->product, product, sizeof(frame->product));

	return 0;
}
EXPORT_SYMBOL(hdmi_spd_infoframe_init);

static int hdmi_spd_infoframe_check_only(const struct hdmi_spd_infoframe *frame)
{
	if (frame->type != HDMI_INFOFRAME_TYPE_SPD ||
	    frame->version != 1 ||
	    frame->length != HDMI_SPD_INFOFRAME_SIZE)
		return -EINVAL;

	return 0;
}

/**
 * hdmi_spd_infoframe_check() - check a HDMI SPD infoframe
 * @frame: HDMI SPD infoframe
 *
 * Validates that the infoframe is consistent and updates derived fields
 * (eg. length) based on other fields.
 *
 * Returns 0 on success or a negative error code on failure.
 */
int hdmi_spd_infoframe_check(struct hdmi_spd_infoframe *frame)
{
	return hdmi_spd_infoframe_check_only(frame);
}
EXPORT_SYMBOL(hdmi_spd_infoframe_check);

/**
 * hdmi_spd_infoframe_pack_only() - write HDMI SPD infoframe to binary buffer
 * @frame: HDMI SPD infoframe
 * @buffer: destination buffer
 * @size: size of buffer
 *
 * Packs the information contained in the @frame structure into a binary
 * representation that can be written into the corresponding controller
 * registers. Also computes the checksum as required by section 5.3.5 of
 * the HDMI 1.4 specification.
 *
 * Returns the number of bytes packed into the binary buffer or a negative
 * error code on failure.
 */
ssize_t hdmi_spd_infoframe_pack_only(const struct hdmi_spd_infoframe *frame,
				     void *buffer, size_t size)
{
	u8 *ptr = buffer;
	size_t length;
	int ret;

	ret = hdmi_spd_infoframe_check_only(frame);
	if (ret)
		return ret;

	length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;

	if (size < length)
		return -ENOSPC;

	memset(buffer, 0, size);

	ptr[0] = frame->type;
	ptr[1] = frame->version;
	ptr[2] = frame->length;
	ptr[3] = 0; /* checksum */

	/* start infoframe payload */
	ptr += HDMI_INFOFRAME_HEADER_SIZE;

	memcpy(ptr, frame->vendor, sizeof(frame->vendor));
	memcpy(ptr + 8, frame->product, sizeof(frame->product));

	ptr[24] = frame->sdi;

	hdmi_infoframe_set_checksum(buffer, length);

	return length;
}
EXPORT_SYMBOL(hdmi_spd_infoframe_pack_only);

/**
 * hdmi_spd_infoframe_pack() - check a HDMI SPD infoframe,
 *                             and write it to binary buffer
 * @frame: HDMI SPD infoframe
 * @buffer: destination buffer
 * @size: size of buffer
 *
 * Validates that the infoframe is consistent and updates derived fields
 * (eg. length) based on other fields, after which it packs the information
 * contained in the @frame structure into a binary representation that
 * can be written into the corresponding controller registers. This function
 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
 * specification.
 *
 * Returns the number of bytes packed into the binary buffer or a negative
 * error code on failure.
 */
ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame,
				void *buffer, size_t size)
{
	int ret;

	ret = hdmi_spd_infoframe_check(frame);
	if (ret)
		return ret;

	return hdmi_spd_infoframe_pack_only(frame, buffer, size);
}
EXPORT_SYMBOL(hdmi_spd_infoframe_pack);

/**
 * hdmi_audio_infoframe_init() - initialize an HDMI audio infoframe
 * @frame: HDMI audio infoframe
 *
 * Returns 0 on success or a negative error code on failure.
 */
int hdmi_audio_infoframe_init(struct hdmi_audio_infoframe *frame)
{
	memset(frame, 0, sizeof(*frame));

	frame->type = HDMI_INFOFRAME_TYPE_AUDIO;
	frame->version = 1;
	frame->length = HDMI_AUDIO_INFOFRAME_SIZE;

	return 0;
}
EXPORT_SYMBOL(hdmi_audio_infoframe_init);

static int hdmi_audio_infoframe_check_only(const struct hdmi_audio_infoframe *frame)
{
	if (frame->type != HDMI_INFOFRAME_TYPE_AUDIO ||
	    frame->version != 1 ||
	    frame->length != HDMI_AUDIO_INFOFRAME_SIZE)
		return -EINVAL;

	return 0;
}

/**
 * hdmi_audio_infoframe_check() - check a HDMI audio infoframe
 * @frame: HDMI audio infoframe
 *
 * Validates that the infoframe is consistent and updates derived fields
 * (eg. length) based on other fields.
 *
 * Returns 0 on success or a negative error code on failure.
 */
int hdmi_audio_infoframe_check(struct hdmi_audio_infoframe *frame)
{
	return hdmi_audio_infoframe_check_only(frame);
}
EXPORT_SYMBOL(hdmi_audio_infoframe_check);

/**
 * hdmi_audio_infoframe_pack_only() - write HDMI audio infoframe to binary buffer
 * @frame: HDMI audio infoframe
 * @buffer: destination buffer
 * @size: size of buffer
 *
 * Packs the information contained in the @frame structure into a binary
 * representation that can be written into the corresponding controller
 * registers. Also computes the checksum as required by section 5.3.5 of
 * the HDMI 1.4 specification.
 *
 * Returns the number of bytes packed into the binary buffer or a negative
 * error code on failure.
 */
ssize_t hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe *frame,
				       void *buffer, size_t size)
{
	unsigned char channels;
	u8 *ptr = buffer;
	size_t length;
	int ret;

	ret = hdmi_audio_infoframe_check_only(frame);
	if (ret)
		return ret;

	length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;

	if (size < length)
		return -ENOSPC;

	memset(buffer, 0, size);

	if (frame->channels >= 2)
		channels = frame->channels - 1;
	else
		channels = 0;

	ptr[0] = frame->type;
	ptr[1] = frame->version;
	ptr[2] = frame->length;
	ptr[3] = 0; /* checksum */

	/* start infoframe payload */
	ptr += HDMI_INFOFRAME_HEADER_SIZE;

	ptr[0] = ((frame->coding_type & 0xf) << 4) | (channels & 0x7);
	ptr[1] = ((frame->sample_frequency & 0x7) << 2) |
		 (frame->sample_size & 0x3);
	ptr[2] = frame->coding_type_ext & 0x1f;
	ptr[3] = frame->channel_allocation;
	ptr[4] = (frame->level_shift_value & 0xf) << 3;

	if (frame->downmix_inhibit)
		ptr[4] |= BIT(7);

	hdmi_infoframe_set_checksum(buffer, length);

	return length;
}
EXPORT_SYMBOL(hdmi_audio_infoframe_pack_only);

/**
 * hdmi_audio_infoframe_pack() - check a HDMI Audio infoframe,
 *                               and write it to binary buffer
 * @frame: HDMI Audio infoframe
 * @buffer: destination buffer
 * @size: size of buffer
 *
 * Validates that the infoframe is consistent and updates derived fields
 * (eg. length) based on other fields, after which it packs the information
 * contained in the @frame structure into a binary representation that
 * can be written into the corresponding controller registers. This function
 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
 * specification.
 *
 * Returns the number of bytes packed into the binary buffer or a negative
 * error code on failure.
 */
ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame,
				  void *buffer, size_t size)
{
	int ret;

	ret = hdmi_audio_infoframe_check(frame);
	if (ret)
		return ret;

	return hdmi_audio_infoframe_pack_only(frame, buffer, size);
}
EXPORT_SYMBOL(hdmi_audio_infoframe_pack);

/**
 * hdmi_vendor_infoframe_init() - initialize an HDMI vendor infoframe
 * @frame: HDMI vendor infoframe
 *
 * Returns 0 on success or a negative error code on failure.
 */
int hdmi_vendor_infoframe_init(struct hdmi_vendor_infoframe *frame)
{
	memset(frame, 0, sizeof(*frame));

	frame->type = HDMI_INFOFRAME_TYPE_VENDOR;
	frame->version = 1;

	frame->oui = HDMI_IEEE_OUI;

	/*
	 * 0 is a valid value for s3d_struct, so we use a special "not set"
	 * value
	 */
	frame->s3d_struct = HDMI_3D_STRUCTURE_INVALID;
	frame->length = 4;

	return 0;
}
EXPORT_SYMBOL(hdmi_vendor_infoframe_init);

static int hdmi_vendor_infoframe_length(const struct hdmi_vendor_infoframe *frame)
{
	/* for side by side (half) we also need to provide 3D_Ext_Data */
	if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
		return 6;
	else if (frame->vic != 0 || frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
		return 5;
	else
		return 4;
}

static int hdmi_vendor_infoframe_check_only(const struct hdmi_vendor_infoframe *frame)
{
	if (frame->type != HDMI_INFOFRAME_TYPE_VENDOR ||
	    frame->version != 1 ||
	    frame->oui != HDMI_IEEE_OUI)
		return -EINVAL;

	/* only one of those can be supplied */
	if (frame->vic != 0 && frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
		return -EINVAL;

	if (frame->length != hdmi_vendor_infoframe_length(frame))
		return -EINVAL;

	return 0;
}

/**
 * hdmi_vendor_infoframe_check() - check a HDMI vendor infoframe
 * @frame: HDMI infoframe
 *
 * Validates that the infoframe is consistent and updates derived fields
 * (eg. length) based on other fields.
 *
 * Returns 0 on success or a negative error code on failure.
 */
int hdmi_vendor_infoframe_check(struct hdmi_vendor_infoframe *frame)
{
	frame->length = hdmi_vendor_infoframe_length(frame);

	return hdmi_vendor_infoframe_check_only(frame);
}
EXPORT_SYMBOL(hdmi_vendor_infoframe_check);

/**
 * hdmi_vendor_infoframe_pack_only() - write a HDMI vendor infoframe to binary buffer
 * @frame: HDMI infoframe
 * @buffer: destination buffer
 * @size: size of buffer
 *
 * Packs the information contained in the @frame structure into a binary
 * representation that can be written into the corresponding controller
 * registers. Also computes the checksum as required by section 5.3.5 of
 * the HDMI 1.4 specification.
 *
 * Returns the number of bytes packed into the binary buffer or a negative
 * error code on failure.
 */
ssize_t hdmi_vendor_infoframe_pack_only(const struct hdmi_vendor_infoframe *frame,
					void *buffer, size_t size)
{
	u8 *ptr = buffer;
	size_t length;
	int ret;

	ret = hdmi_vendor_infoframe_check_only(frame);
	if (ret)
		return ret;

	length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;

	if (size < length)
		return -ENOSPC;

	memset(buffer, 0, size);

	ptr[0] = frame->type;
	ptr[1] = frame->version;
	ptr[2] = frame->length;
	ptr[3] = 0; /* checksum */

	/* HDMI OUI */
	ptr[4] = 0x03;
	ptr[5] = 0x0c;
	ptr[6] = 0x00;

	if (frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
		ptr[7] = 0x2 << 5;	/* video format */
		ptr[8] = (frame->s3d_struct & 0xf) << 4;
		if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
			ptr[9] = (frame->s3d_ext_data & 0xf) << 4;
	} else if (frame->vic) {
		ptr[7] = 0x1 << 5;	/* video format */
		ptr[8] = frame->vic;
	} else {
		ptr[7] = 0x0 << 5;	/* video format */
	}

	hdmi_infoframe_set_checksum(buffer, length);

	return length;
}
EXPORT_SYMBOL(hdmi_vendor_infoframe_pack_only);

/**
 * hdmi_vendor_infoframe_pack() - check a HDMI Vendor infoframe,
 *                                and write it to binary buffer
 * @frame: HDMI Vendor infoframe
 * @buffer: destination buffer
 * @size: size of buffer
 *
 * Validates that the infoframe is consistent and updates derived fields
 * (eg. length) based on other fields, after which it packs the information
 * contained in the @frame structure into a binary representation that
 * can be written into the corresponding controller registers. This function
 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
 * specification.
 *
 * Returns the number of bytes packed into the binary buffer or a negative
 * error code on failure.
 */
ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
				   void *buffer, size_t size)
{
	int ret;

	ret = hdmi_vendor_infoframe_check(frame);
	if (ret)
		return ret;

	return hdmi_vendor_infoframe_pack_only(frame, buffer, size);
}
EXPORT_SYMBOL(hdmi_vendor_infoframe_pack);

static int
hdmi_vendor_any_infoframe_check_only(const union hdmi_vendor_any_infoframe *frame)
{
	if (frame->any.type != HDMI_INFOFRAME_TYPE_VENDOR ||
	    frame->any.version != 1)
		return -EINVAL;

	return 0;
}

/**
 * hdmi_drm_infoframe_init() - initialize an HDMI Dynaminc Range and
 * mastering infoframe
 * @frame: HDMI DRM infoframe
 *
 * Returns 0 on success or a negative error code on failure.
 */
int hdmi_drm_infoframe_init(struct hdmi_drm_infoframe *frame)
{
	memset(frame, 0, sizeof(*frame));

	frame->type = HDMI_INFOFRAME_TYPE_DRM;
	frame->version = 1;
	frame->length = HDMI_DRM_INFOFRAME_SIZE;

	return 0;
}
EXPORT_SYMBOL(hdmi_drm_infoframe_init);

static int hdmi_drm_infoframe_check_only(const struct hdmi_drm_infoframe *frame)
{
	if (frame->type != HDMI_INFOFRAME_TYPE_DRM ||
	    frame->version != 1)
		return -EINVAL;

	if (frame->length != HDMI_DRM_INFOFRAME_SIZE)
		return -EINVAL;

	return 0;
}

/**
 * hdmi_drm_infoframe_check() - check a HDMI DRM infoframe
 * @frame: HDMI DRM infoframe
 *
 * Validates that the infoframe is consistent.
 * Returns 0 on success or a negative error code on failure.
 */
int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame)
{
	return hdmi_drm_infoframe_check_only(frame);
}
EXPORT_SYMBOL(hdmi_drm_infoframe_check);

/**
 * hdmi_drm_infoframe_pack_only() - write HDMI DRM infoframe to binary buffer
 * @frame: HDMI DRM infoframe
 * @buffer: destination buffer
 * @size: size of buffer
 *
 * Packs the information contained in the @frame structure into a binary
 * representation that can be written into the corresponding controller
 * registers. Also computes the checksum as required by section 5.3.5 of
 * the HDMI 1.4 specification.
 *
 * Returns the number of bytes packed into the binary buffer or a negative
 * error code on failure.
 */
ssize_t hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe *frame,
				     void *buffer, size_t size)
{
	u8 *ptr = buffer;
	size_t length;
	int i;

	length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;

	if (size < length)
		return -ENOSPC;

	memset(buffer, 0, size);

	ptr[0] = frame->type;
	ptr[1] = frame->version;
	ptr[2] = frame->length;
	ptr[3] = 0; /* checksum */

	/* start infoframe payload */
	ptr += HDMI_INFOFRAME_HEADER_SIZE;

	*ptr++ = frame->eotf;
	*ptr++ = frame->metadata_type;

	for (i = 0; i < 3; i++) {
		*ptr++ = frame->display_primaries[i].x;
		*ptr++ = frame->display_primaries[i].x >> 8;
		*ptr++ = frame->display_primaries[i].y;
		*ptr++ = frame->display_primaries[i].y >> 8;
	}

	*ptr++ = frame->white_point.x;
	*ptr++ = frame->white_point.x >> 8;

	*ptr++ = frame->white_point.y;
	*ptr++ = frame->white_point.y >> 8;

	*ptr++ = frame->max_display_mastering_luminance;
	*ptr++ = frame->max_display_mastering_luminance >> 8;

	*ptr++ = frame->min_display_mastering_luminance;
	*ptr++ = frame->min_display_mastering_luminance >> 8;

	*ptr++ = frame->max_cll;
	*ptr++ = frame->max_cll >> 8;

	*ptr++ = frame->max_fall;
	*ptr++ = frame->max_fall >> 8;

	hdmi_infoframe_set_checksum(buffer, length);

	return length;
}
EXPORT_SYMBOL(hdmi_drm_infoframe_pack_only);

/**
 * hdmi_drm_infoframe_pack() - check a HDMI DRM infoframe,
 *                             and write it to binary buffer
 * @frame: HDMI DRM infoframe
 * @buffer: destination buffer
 * @size: size of buffer
 *
 * Validates that the infoframe is consistent and updates derived fields
 * (eg. length) based on other fields, after which it packs the information
 * contained in the @frame structure into a binary representation that
 * can be written into the corresponding controller registers. This function
 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
 * specification.
 *
 * Returns the number of bytes packed into the binary buffer or a negative
 * error code on failure.
 */
ssize_t hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe *frame,
				void *buffer, size_t size)
{
	int ret;

	ret = hdmi_drm_infoframe_check(frame);
	if (ret)
		return ret;

	return hdmi_drm_infoframe_pack_only(frame, buffer, size);
}
EXPORT_SYMBOL(hdmi_drm_infoframe_pack);

/*
 * hdmi_vendor_any_infoframe_check() - check a vendor infoframe
 */
static int
hdmi_vendor_any_infoframe_check(union hdmi_vendor_any_infoframe *frame)
{
	int ret;

	ret = hdmi_vendor_any_infoframe_check_only(frame);
	if (ret)
		return ret;

	/* we only know about HDMI vendor infoframes */
	if (frame->any.oui != HDMI_IEEE_OUI)
		return -EINVAL;

	return hdmi_vendor_infoframe_check(&frame->hdmi);
}

/*
 * hdmi_vendor_any_infoframe_pack_only() - write a vendor infoframe to binary buffer
 */
static ssize_t
hdmi_vendor_any_infoframe_pack_only(const union hdmi_vendor_any_infoframe *frame,
				    void *buffer, size_t size)
{
	int ret;

	ret = hdmi_vendor_any_infoframe_check_only(frame);
	if (ret)
		return ret;

	/* we only know about HDMI vendor infoframes */
	if (frame->any.oui != HDMI_IEEE_OUI)
		return -EINVAL;

	return hdmi_vendor_infoframe_pack_only(&frame->hdmi, buffer, size);
}

/*
 * hdmi_vendor_any_infoframe_pack() - check a vendor infoframe,
 *                                    and write it to binary buffer
 */
static ssize_t
hdmi_vendor_any_infoframe_pack(union hdmi_vendor_any_infoframe *frame,
			       void *buffer, size_t size)
{
	int ret;

	ret = hdmi_vendor_any_infoframe_check(frame);
	if (ret)
		return ret;

	return hdmi_vendor_any_infoframe_pack_only(frame, buffer, size);
}

/**
 * hdmi_infoframe_check() - check a HDMI infoframe
 * @frame: HDMI infoframe
 *
 * Validates that the infoframe is consistent and updates derived fields
 * (eg. length) based on other fields.
 *
 * Returns 0 on success or a negative error code on failure.
 */
int
hdmi_infoframe_check(union hdmi_infoframe *frame)
{
	switch (frame->any.type) {
	case HDMI_INFOFRAME_TYPE_AVI:
		return hdmi_avi_infoframe_check(&frame->avi);
	case HDMI_INFOFRAME_TYPE_SPD:
		return hdmi_spd_infoframe_check(&frame->spd);
	case HDMI_INFOFRAME_TYPE_AUDIO:
		return hdmi_audio_infoframe_check(&frame->audio);
	case HDMI_INFOFRAME_TYPE_VENDOR:
		return hdmi_vendor_any_infoframe_check(&frame->vendor);
	default:
		WARN(1, "Bad infoframe type %d\n", frame->any.type);
		return -EINVAL;
	}
}
EXPORT_SYMBOL(hdmi_infoframe_check);

/**
 * hdmi_infoframe_pack_only() - write a HDMI infoframe to binary buffer
 * @frame: HDMI infoframe
 * @buffer: destination buffer
 * @size: size of buffer
 *
 * Packs the information contained in the @frame structure into a binary
 * representation that can be written into the corresponding controller
 * registers. Also computes the checksum as required by section 5.3.5 of
 * the HDMI 1.4 specification.
 *
 * Returns the number of bytes packed into the binary buffer or a negative
 * error code on failure.
 */
ssize_t
hdmi_infoframe_pack_only(const union hdmi_infoframe *frame, void *buffer, size_t size)
{
	ssize_t length;

	switch (frame->any.type) {
	case HDMI_INFOFRAME_TYPE_AVI:
		length = hdmi_avi_infoframe_pack_only(&frame->avi,
						      buffer, size);
		break;
	case HDMI_INFOFRAME_TYPE_DRM:
		length = hdmi_drm_infoframe_pack_only(&frame->drm,
						      buffer, size);
		break;
	case HDMI_INFOFRAME_TYPE_SPD:
		length = hdmi_spd_infoframe_pack_only(&frame->spd,
						      buffer, size);
		break;
	case HDMI_INFOFRAME_TYPE_AUDIO:
		length = hdmi_audio_infoframe_pack_only(&frame->audio,
							buffer, size);
		break;
	case HDMI_INFOFRAME_TYPE_VENDOR:
		length = hdmi_vendor_any_infoframe_pack_only(&frame->vendor,
							     buffer, size);
		break;
	default:
		WARN(1, "Bad infoframe type %d\n", frame->any.type);
		length = -EINVAL;
	}

	return length;
}
EXPORT_SYMBOL(hdmi_infoframe_pack_only);

/**
 * hdmi_infoframe_pack() - check a HDMI infoframe,
 *                         and write it to binary buffer
 * @frame: HDMI infoframe
 * @buffer: destination buffer
 * @size: size of buffer
 *
 * Validates that the infoframe is consistent and updates derived fields
 * (eg. length) based on other fields, after which it packs the information
 * contained in the @frame structure into a binary representation that
 * can be written into the corresponding controller registers. This function
 * also computes the checksum as required by section 5.3.5 of the HDMI 1.4
 * specification.
 *
 * Returns the number of bytes packed into the binary buffer or a negative
 * error code on failure.
 */
ssize_t
hdmi_infoframe_pack(union hdmi_infoframe *frame,
		    void *buffer, size_t size)
{
	ssize_t length;

	switch (frame->any.type) {
	case HDMI_INFOFRAME_TYPE_AVI:
		length = hdmi_avi_infoframe_pack(&frame->avi, buffer, size);
		break;
	case HDMI_INFOFRAME_TYPE_DRM:
		length = hdmi_drm_infoframe_pack(&frame->drm, buffer, size);
		break;
	case HDMI_INFOFRAME_TYPE_SPD:
		length = hdmi_spd_infoframe_pack(&frame->spd, buffer, size);
		break;
	case HDMI_INFOFRAME_TYPE_AUDIO:
		length = hdmi_audio_infoframe_pack(&frame->audio, buffer, size);
		break;
	case HDMI_INFOFRAME_TYPE_VENDOR:
		length = hdmi_vendor_any_infoframe_pack(&frame->vendor,
							buffer, size);
		break;
	default:
		WARN(1, "Bad infoframe type %d\n", frame->any.type);
		length = -EINVAL;
	}

	return length;
}
EXPORT_SYMBOL(hdmi_infoframe_pack);

static const char *hdmi_infoframe_type_get_name(enum hdmi_infoframe_type type)
{
	if (type < 0x80 || type > 0x9f)
		return "Invalid";
	switch (type) {
	case HDMI_INFOFRAME_TYPE_VENDOR:
		return "Vendor";
	case HDMI_INFOFRAME_TYPE_AVI:
		return "Auxiliary Video Information (AVI)";
	case HDMI_INFOFRAME_TYPE_SPD:
		return "Source Product Description (SPD)";
	case HDMI_INFOFRAME_TYPE_AUDIO:
		return "Audio";
	case HDMI_INFOFRAME_TYPE_DRM:
		return "Dynamic Range and Mastering";
	}
	return "Reserved";
}

static void hdmi_infoframe_log_header(const char *level,
				      struct device *dev,
				      const struct hdmi_any_infoframe *frame)
{
	hdmi_log("HDMI infoframe: %s, version %u, length %u\n",
		hdmi_infoframe_type_get_name(frame->type),
		frame->version, frame->length);
}

static const char *hdmi_colorspace_get_name(enum hdmi_colorspace colorspace)
{
	switch (colorspace) {
	case HDMI_COLORSPACE_RGB:
		return "RGB";
	case HDMI_COLORSPACE_YUV422:
		return "YCbCr 4:2:2";
	case HDMI_COLORSPACE_YUV444:
		return "YCbCr 4:4:4";
	case HDMI_COLORSPACE_YUV420:
		return "YCbCr 4:2:0";
	case HDMI_COLORSPACE_RESERVED4:
		return "Reserved (4)";
	case HDMI_COLORSPACE_RESERVED5:
		return "Reserved (5)";
	case HDMI_COLORSPACE_RESERVED6:
		return "Reserved (6)";
	case HDMI_COLORSPACE_IDO_DEFINED:
		return "IDO Defined";
	}
	return "Invalid";
}

static const char *hdmi_scan_mode_get_name(enum hdmi_scan_mode scan_mode)
{
	switch (scan_mode) {
	case HDMI_SCAN_MODE_NONE:
		return "No Data";
	case HDMI_SCAN_MODE_OVERSCAN:
		return "Overscan";
	case HDMI_SCAN_MODE_UNDERSCAN:
		return "Underscan";
	case HDMI_SCAN_MODE_RESERVED:
		return "Reserved";
	}
	return "Invalid";
}

static const char *hdmi_colorimetry_get_name(enum hdmi_colorimetry colorimetry)
{
	switch (colorimetry) {
	case HDMI_COLORIMETRY_NONE:
		return "No Data";
	case HDMI_COLORIMETRY_ITU_601:
		return "ITU601";
	case HDMI_COLORIMETRY_ITU_709:
		return "ITU709";
	case HDMI_COLORIMETRY_EXTENDED:
		return "Extended";
	}
	return "Invalid";
}

static const char *
hdmi_picture_aspect_get_name(enum hdmi_picture_aspect picture_aspect)
{
	switch (picture_aspect) {
	case HDMI_PICTURE_ASPECT_NONE:
		return "No Data";
	case HDMI_PICTURE_ASPECT_4_3:
		return "4:3";
	case HDMI_PICTURE_ASPECT_16_9:
		return "16:9";
	case HDMI_PICTURE_ASPECT_64_27:
		return "64:27";
	case HDMI_PICTURE_ASPECT_256_135:
		return "256:135";
	case HDMI_PICTURE_ASPECT_RESERVED:
		return "Reserved";
	}
	return "Invalid";
}

static const char *
hdmi_active_aspect_get_name(enum hdmi_active_aspect active_aspect)
{
	if (active_aspect < 0 || active_aspect > 0xf)
		return "Invalid";

	switch (active_aspect) {
	case HDMI_ACTIVE_ASPECT_16_9_TOP:
		return "16:9 Top";
	case HDMI_ACTIVE_ASPECT_14_9_TOP:
		return "14:9 Top";
	case HDMI_ACTIVE_ASPECT_16_9_CENTER:
		return "16:9 Center";
	case HDMI_ACTIVE_ASPECT_PICTURE:
		return "Same as Picture";
	case HDMI_ACTIVE_ASPECT_4_3:
		return "4:3";
	case HDMI_ACTIVE_ASPECT_16_9:
		return "16:9";
	case HDMI_ACTIVE_ASPECT_14_9:
		return "14:9";
	case HDMI_ACTIVE_ASPECT_4_3_SP_14_9:
		return "4:3 SP 14:9";
	case HDMI_ACTIVE_ASPECT_16_9_SP_14_9:
		return "16:9 SP 14:9";
	case HDMI_ACTIVE_ASPECT_16_9_SP_4_3:
		return "16:9 SP 4:3";
	}
	return "Reserved";
}

static const char *
hdmi_extended_colorimetry_get_name(enum hdmi_extended_colorimetry ext_col)
{
	switch (ext_col) {
	case HDMI_EXTENDED_COLORIMETRY_XV_YCC_601:
		return "xvYCC 601";
	case HDMI_EXTENDED_COLORIMETRY_XV_YCC_709:
		return "xvYCC 709";
	case HDMI_EXTENDED_COLORIMETRY_S_YCC_601:
		return "sYCC 601";
	case HDMI_EXTENDED_COLORIMETRY_OPYCC_601:
		return "opYCC 601";
	case HDMI_EXTENDED_COLORIMETRY_OPRGB:
		return "opRGB";
	case HDMI_EXTENDED_COLORIMETRY_BT2020_CONST_LUM:
		return "BT.2020 Constant Luminance";
	case HDMI_EXTENDED_COLORIMETRY_BT2020:
		return "BT.2020";
	case HDMI_EXTENDED_COLORIMETRY_RESERVED:
		return "Reserved";
	}
	return "Invalid";
}

static const char *
hdmi_quantization_range_get_name(enum hdmi_quantization_range qrange)
{
	switch (qrange) {
	case HDMI_QUANTIZATION_RANGE_DEFAULT:
		return "Default";
	case HDMI_QUANTIZATION_RANGE_LIMITED:
		return "Limited";
	case HDMI_QUANTIZATION_RANGE_FULL:
		return "Full";
	case HDMI_QUANTIZATION_RANGE_RESERVED:
		return "Reserved";
	}
	return "Invalid";
}

static const char *hdmi_nups_get_name(enum hdmi_nups nups)
{
	switch (nups) {
	case HDMI_NUPS_UNKNOWN:
		return "Unknown Non-uniform Scaling";
	case HDMI_NUPS_HORIZONTAL:
		return "Horizontally Scaled";
	case HDMI_NUPS_VERTICAL:
		return "Vertically Scaled";
	case HDMI_NUPS_BOTH:
		return "Horizontally and Vertically Scaled";
	}
	return "Invalid";
}

static const char *
hdmi_ycc_quantization_range_get_name(enum hdmi_ycc_quantization_range qrange)
{
	switch (qrange) {
	case HDMI_YCC_QUANTIZATION_RANGE_LIMITED:
		return "Limited";
	case HDMI_YCC_QUANTIZATION_RANGE_FULL:
		return "Full";
	}
	return "Invalid";
}

static const char *
hdmi_content_type_get_name(enum hdmi_content_type content_type)
{
	switch (content_type) {
	case HDMI_CONTENT_TYPE_GRAPHICS:
		return "Graphics";
	case HDMI_CONTENT_TYPE_PHOTO:
		return "Photo";
	case HDMI_CONTENT_TYPE_CINEMA:
		return "Cinema";
	case HDMI_CONTENT_TYPE_GAME:
		return "Game";
	}
	return "Invalid";
}

static void hdmi_avi_infoframe_log(const char *level,
				   struct device *dev,
				   const struct hdmi_avi_infoframe *frame)
{
	hdmi_infoframe_log_header(level, dev,
				  (const struct hdmi_any_infoframe *)frame);

	hdmi_log("    colorspace: %s\n",
			hdmi_colorspace_get_name(frame->colorspace));
	hdmi_log("    scan mode: %s\n",
			hdmi_scan_mode_get_name(frame->scan_mode));
	hdmi_log("    colorimetry: %s\n",
			hdmi_colorimetry_get_name(frame->colorimetry));
	hdmi_log("    picture aspect: %s\n",
			hdmi_picture_aspect_get_name(frame->picture_aspect));
	hdmi_log("    active aspect: %s\n",
			hdmi_active_aspect_get_name(frame->active_aspect));
	hdmi_log("    itc: %s\n", frame->itc ? "IT Content" : "No Data");
	hdmi_log("    extended colorimetry: %s\n",
			hdmi_extended_colorimetry_get_name(frame->extended_colorimetry));
	hdmi_log("    quantization range: %s\n",
			hdmi_quantization_range_get_name(frame->quantization_range));
	hdmi_log("    nups: %s\n", hdmi_nups_get_name(frame->nups));
	hdmi_log("    video code: %u\n", frame->video_code);
	hdmi_log("    ycc quantization range: %s\n",
			hdmi_ycc_quantization_range_get_name(frame->ycc_quantization_range));
	hdmi_log("    hdmi content type: %s\n",
			hdmi_content_type_get_name(frame->content_type));
	hdmi_log("    pixel repeat: %u\n", frame->pixel_repeat);
	hdmi_log("    bar top %u, bottom %u, left %u, right %u\n",
			frame->top_bar, frame->bottom_bar,
			frame->left_bar, frame->right_bar);
}

static const char *hdmi_spd_sdi_get_name(enum hdmi_spd_sdi sdi)
{
	if (sdi < 0 || sdi > 0xff)
		return "Invalid";
	switch (sdi) {
	case HDMI_SPD_SDI_UNKNOWN:
		return "Unknown";
	case HDMI_SPD_SDI_DSTB:
		return "Digital STB";
	case HDMI_SPD_SDI_DVDP:
		return "DVD Player";
	case HDMI_SPD_SDI_DVHS:
		return "D-VHS";
	case HDMI_SPD_SDI_HDDVR:
		return "HDD Videorecorder";
	case HDMI_SPD_SDI_DVC:
		return "DVC";
	case HDMI_SPD_SDI_DSC:
		return "DSC";
	case HDMI_SPD_SDI_VCD:
		return "Video CD";
	case HDMI_SPD_SDI_GAME:
		return "Game";
	case HDMI_SPD_SDI_PC:
		return "PC General";
	case HDMI_SPD_SDI_BD:
		return "Blu-Ray Disc (BD)";
	case HDMI_SPD_SDI_SACD:
		return "Super Audio CD";
	case HDMI_SPD_SDI_HDDVD:
		return "HD DVD";
	case HDMI_SPD_SDI_PMP:
		return "PMP";
	}
	return "Reserved";
}

static void hdmi_spd_infoframe_log(const char *level,
				   struct device *dev,
				   const struct hdmi_spd_infoframe *frame)
{
	u8 buf[17];

	hdmi_infoframe_log_header(level, dev,
				  (const struct hdmi_any_infoframe *)frame);

	memset(buf, 0, sizeof(buf));

	strncpy(buf, frame->vendor, 8);
	hdmi_log("    vendor: %s\n", buf);
	strncpy(buf, frame->product, 16);
	hdmi_log("    product: %s\n", buf);
	hdmi_log("    source device information: %s (0x%x)\n",
		hdmi_spd_sdi_get_name(frame->sdi), frame->sdi);
}

static const char *
hdmi_audio_coding_type_get_name(enum hdmi_audio_coding_type coding_type)
{
	switch (coding_type) {
	case HDMI_AUDIO_CODING_TYPE_STREAM:
		return "Refer to Stream Header";
	case HDMI_AUDIO_CODING_TYPE_PCM:
		return "PCM";
	case HDMI_AUDIO_CODING_TYPE_AC3:
		return "AC-3";
	case HDMI_AUDIO_CODING_TYPE_MPEG1:
		return "MPEG1";
	case HDMI_AUDIO_CODING_TYPE_MP3:
		return "MP3";
	case HDMI_AUDIO_CODING_TYPE_MPEG2:
		return "MPEG2";
	case HDMI_AUDIO_CODING_TYPE_AAC_LC:
		return "AAC";
	case HDMI_AUDIO_CODING_TYPE_DTS:
		return "DTS";
	case HDMI_AUDIO_CODING_TYPE_ATRAC:
		return "ATRAC";
	case HDMI_AUDIO_CODING_TYPE_DSD:
		return "One Bit Audio";
	case HDMI_AUDIO_CODING_TYPE_EAC3:
		return "Dolby Digital +";
	case HDMI_AUDIO_CODING_TYPE_DTS_HD:
		return "DTS-HD";
	case HDMI_AUDIO_CODING_TYPE_MLP:
		return "MAT (MLP)";
	case HDMI_AUDIO_CODING_TYPE_DST:
		return "DST";
	case HDMI_AUDIO_CODING_TYPE_WMA_PRO:
		return "WMA PRO";
	case HDMI_AUDIO_CODING_TYPE_CXT:
		return "Refer to CXT";
	}
	return "Invalid";
}

static const char *
hdmi_audio_sample_size_get_name(enum hdmi_audio_sample_size sample_size)
{
	switch (sample_size) {
	case HDMI_AUDIO_SAMPLE_SIZE_STREAM:
		return "Refer to Stream Header";
	case HDMI_AUDIO_SAMPLE_SIZE_16:
		return "16 bit";
	case HDMI_AUDIO_SAMPLE_SIZE_20:
		return "20 bit";
	case HDMI_AUDIO_SAMPLE_SIZE_24:
		return "24 bit";
	}
	return "Invalid";
}

static const char *
hdmi_audio_sample_frequency_get_name(enum hdmi_audio_sample_frequency freq)
{
	switch (freq) {
	case HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM:
		return "Refer to Stream Header";
	case HDMI_AUDIO_SAMPLE_FREQUENCY_32000:
		return "32 kHz";
	case HDMI_AUDIO_SAMPLE_FREQUENCY_44100:
		return "44.1 kHz (CD)";
	case HDMI_AUDIO_SAMPLE_FREQUENCY_48000:
		return "48 kHz";
	case HDMI_AUDIO_SAMPLE_FREQUENCY_88200:
		return "88.2 kHz";
	case HDMI_AUDIO_SAMPLE_FREQUENCY_96000:
		return "96 kHz";
	case HDMI_AUDIO_SAMPLE_FREQUENCY_176400:
		return "176.4 kHz";
	case HDMI_AUDIO_SAMPLE_FREQUENCY_192000:
		return "192 kHz";
	}
	return "Invalid";
}

static const char *
hdmi_audio_coding_type_ext_get_name(enum hdmi_audio_coding_type_ext ctx)
{
	if (ctx < 0 || ctx > 0x1f)
		return "Invalid";

	switch (ctx) {
	case HDMI_AUDIO_CODING_TYPE_EXT_CT:
		return "Refer to CT";
	case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC:
		return "HE AAC";
	case HDMI_AUDIO_CODING_TYPE_EXT_HE_AAC_V2:
		return "HE AAC v2";
	case HDMI_AUDIO_CODING_TYPE_EXT_MPEG_SURROUND:
		return "MPEG SURROUND";
	case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC:
		return "MPEG-4 HE AAC";
	case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_V2:
		return "MPEG-4 HE AAC v2";
	case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC:
		return "MPEG-4 AAC LC";
	case HDMI_AUDIO_CODING_TYPE_EXT_DRA:
		return "DRA";
	case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_HE_AAC_SURROUND:
		return "MPEG-4 HE AAC + MPEG Surround";
	case HDMI_AUDIO_CODING_TYPE_EXT_MPEG4_AAC_LC_SURROUND:
		return "MPEG-4 AAC LC + MPEG Surround";
	}
	return "Reserved";
}

static void hdmi_audio_infoframe_log(const char *level,
				     struct device *dev,
				     const struct hdmi_audio_infoframe *frame)
{
	hdmi_infoframe_log_header(level, dev,
				  (const struct hdmi_any_infoframe *)frame);

	if (frame->channels)
		hdmi_log("    channels: %u\n", frame->channels - 1);
	else
		hdmi_log("    channels: Refer to stream header\n");
	hdmi_log("    coding type: %s\n",
			hdmi_audio_coding_type_get_name(frame->coding_type));
	hdmi_log("    sample size: %s\n",
			hdmi_audio_sample_size_get_name(frame->sample_size));
	hdmi_log("    sample frequency: %s\n",
			hdmi_audio_sample_frequency_get_name(frame->sample_frequency));
	hdmi_log("    coding type ext: %s\n",
			hdmi_audio_coding_type_ext_get_name(frame->coding_type_ext));
	hdmi_log("    channel allocation: 0x%x\n",
			frame->channel_allocation);
	hdmi_log("    level shift value: %u dB\n",
			frame->level_shift_value);
	hdmi_log("    downmix inhibit: %s\n",
			frame->downmix_inhibit ? "Yes" : "No");
}

static void hdmi_drm_infoframe_log(const char *level,
				   struct device *dev,
				   const struct hdmi_drm_infoframe *frame)
{
	int i;

	hdmi_infoframe_log_header(level, dev,
				  (struct hdmi_any_infoframe *)frame);
	hdmi_log("length: %d\n", frame->length);
	hdmi_log("metadata type: %d\n", frame->metadata_type);
	hdmi_log("eotf: %d\n", frame->eotf);
	for (i = 0; i < 3; i++) {
		hdmi_log("x[%d]: %d\n", i, frame->display_primaries[i].x);
		hdmi_log("y[%d]: %d\n", i, frame->display_primaries[i].y);
	}

	hdmi_log("white point x: %d\n", frame->white_point.x);
	hdmi_log("white point y: %d\n", frame->white_point.y);

	hdmi_log("max_display_mastering_luminance: %d\n",
		 frame->max_display_mastering_luminance);
	hdmi_log("min_display_mastering_luminance: %d\n",
		 frame->min_display_mastering_luminance);

	hdmi_log("max_cll: %d\n", frame->max_cll);
	hdmi_log("max_fall: %d\n", frame->max_fall);
}

static const char *
hdmi_3d_structure_get_name(enum hdmi_3d_structure s3d_struct)
{
	if (s3d_struct < 0 || s3d_struct > 0xf)
		return "Invalid";

	switch (s3d_struct) {
	case HDMI_3D_STRUCTURE_FRAME_PACKING:
		return "Frame Packing";
	case HDMI_3D_STRUCTURE_FIELD_ALTERNATIVE:
		return "Field Alternative";
	case HDMI_3D_STRUCTURE_LINE_ALTERNATIVE:
		return "Line Alternative";
	case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_FULL:
		return "Side-by-side (Full)";
	case HDMI_3D_STRUCTURE_L_DEPTH:
		return "L + Depth";
	case HDMI_3D_STRUCTURE_L_DEPTH_GFX_GFX_DEPTH:
		return "L + Depth + Graphics + Graphics-depth";
	case HDMI_3D_STRUCTURE_TOP_AND_BOTTOM:
		return "Top-and-Bottom";
	case HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF:
		return "Side-by-side (Half)";
	default:
		break;
	}
	return "Reserved";
}

static void
hdmi_vendor_any_infoframe_log(const char *level,
			      struct device *dev,
			      const union hdmi_vendor_any_infoframe *frame)
{
	const struct hdmi_vendor_infoframe *hvf = &frame->hdmi;

	hdmi_infoframe_log_header(level, dev,
				  (const struct hdmi_any_infoframe *)frame);

	if (frame->any.oui != HDMI_IEEE_OUI) {
		hdmi_log("    not a HDMI vendor infoframe\n");
		return;
	}
	if (hvf->vic == 0 && hvf->s3d_struct == HDMI_3D_STRUCTURE_INVALID) {
		hdmi_log("    empty frame\n");
		return;
	}

	if (hvf->vic)
		hdmi_log("    HDMI VIC: %u\n", hvf->vic);
	if (hvf->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
		hdmi_log("    3D structure: %s\n",
				hdmi_3d_structure_get_name(hvf->s3d_struct));
		if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
			hdmi_log("    3D extension data: %d\n",
					hvf->s3d_ext_data);
	}
}

/**
 * hdmi_infoframe_log() - log info of HDMI infoframe
 * @level: logging level
 * @dev: device
 * @frame: HDMI infoframe
 */
void hdmi_infoframe_log(const char *level,
			struct device *dev,
			const union hdmi_infoframe *frame)
{
	switch (frame->any.type) {
	case HDMI_INFOFRAME_TYPE_AVI:
		hdmi_avi_infoframe_log(level, dev, &frame->avi);
		break;
	case HDMI_INFOFRAME_TYPE_SPD:
		hdmi_spd_infoframe_log(level, dev, &frame->spd);
		break;
	case HDMI_INFOFRAME_TYPE_AUDIO:
		hdmi_audio_infoframe_log(level, dev, &frame->audio);
		break;
	case HDMI_INFOFRAME_TYPE_VENDOR:
		hdmi_vendor_any_infoframe_log(level, dev, &frame->vendor);
		break;
	case HDMI_INFOFRAME_TYPE_DRM:
		hdmi_drm_infoframe_log(level, dev, &frame->drm);
		break;
	}
}
EXPORT_SYMBOL(hdmi_infoframe_log);

/**
 * hdmi_avi_infoframe_unpack() - unpack binary buffer to a HDMI AVI infoframe
 * @frame: HDMI AVI infoframe
 * @buffer: source buffer
 * @size: size of buffer
 *
 * Unpacks the information contained in binary @buffer into a structured
 * @frame of the HDMI Auxiliary Video (AVI) information frame.
 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
 * specification.
 *
 * Returns 0 on success or a negative error code on failure.
 */
static int hdmi_avi_infoframe_unpack(struct hdmi_avi_infoframe *frame,
				     const void *buffer, size_t size)
{
	const u8 *ptr = buffer;

	if (size < HDMI_INFOFRAME_SIZE(AVI))
		return -EINVAL;

	if (ptr[0] != HDMI_INFOFRAME_TYPE_AVI ||
	    ptr[1] != 2 ||
	    ptr[2] != HDMI_AVI_INFOFRAME_SIZE)
		return -EINVAL;

	if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AVI)) != 0)
		return -EINVAL;

	hdmi_avi_infoframe_init(frame);

	ptr += HDMI_INFOFRAME_HEADER_SIZE;

	frame->colorspace = (ptr[0] >> 5) & 0x3;
	if (ptr[0] & 0x10)
		frame->active_aspect = ptr[1] & 0xf;
	if (ptr[0] & 0x8) {
		frame->top_bar = (ptr[6] << 8) | ptr[5];
		frame->bottom_bar = (ptr[8] << 8) | ptr[7];
	}
	if (ptr[0] & 0x4) {
		frame->left_bar = (ptr[10] << 8) | ptr[9];
		frame->right_bar = (ptr[12] << 8) | ptr[11];
	}
	frame->scan_mode = ptr[0] & 0x3;

	frame->colorimetry = (ptr[1] >> 6) & 0x3;
	frame->picture_aspect = (ptr[1] >> 4) & 0x3;
	frame->active_aspect = ptr[1] & 0xf;

	frame->itc = ptr[2] & 0x80 ? true : false;
	frame->extended_colorimetry = (ptr[2] >> 4) & 0x7;
	frame->quantization_range = (ptr[2] >> 2) & 0x3;
	frame->nups = ptr[2] & 0x3;

	frame->video_code = ptr[3] & 0x7f;
	frame->ycc_quantization_range = (ptr[4] >> 6) & 0x3;
	frame->content_type = (ptr[4] >> 4) & 0x3;

	frame->pixel_repeat = ptr[4] & 0xf;

	return 0;
}

/**
 * hdmi_spd_infoframe_unpack() - unpack binary buffer to a HDMI SPD infoframe
 * @frame: HDMI SPD infoframe
 * @buffer: source buffer
 * @size: size of buffer
 *
 * Unpacks the information contained in binary @buffer into a structured
 * @frame of the HDMI Source Product Description (SPD) information frame.
 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
 * specification.
 *
 * Returns 0 on success or a negative error code on failure.
 */
static int hdmi_spd_infoframe_unpack(struct hdmi_spd_infoframe *frame,
				     const void *buffer, size_t size)
{
	const u8 *ptr = buffer;
	int ret;

	if (size < HDMI_INFOFRAME_SIZE(SPD))
		return -EINVAL;

	if (ptr[0] != HDMI_INFOFRAME_TYPE_SPD ||
	    ptr[1] != 1 ||
	    ptr[2] != HDMI_SPD_INFOFRAME_SIZE) {
		return -EINVAL;
	}

	if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(SPD)) != 0)
		return -EINVAL;

	ptr += HDMI_INFOFRAME_HEADER_SIZE;

	ret = hdmi_spd_infoframe_init(frame, ptr, ptr + 8);
	if (ret)
		return ret;

	frame->sdi = ptr[24];

	return 0;
}

/**
 * hdmi_audio_infoframe_unpack() - unpack binary buffer to a HDMI AUDIO infoframe
 * @frame: HDMI Audio infoframe
 * @buffer: source buffer
 * @size: size of buffer
 *
 * Unpacks the information contained in binary @buffer into a structured
 * @frame of the HDMI Audio information frame.
 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
 * specification.
 *
 * Returns 0 on success or a negative error code on failure.
 */
static int hdmi_audio_infoframe_unpack(struct hdmi_audio_infoframe *frame,
				       const void *buffer, size_t size)
{
	const u8 *ptr = buffer;
	int ret;

	if (size < HDMI_INFOFRAME_SIZE(AUDIO))
		return -EINVAL;

	if (ptr[0] != HDMI_INFOFRAME_TYPE_AUDIO ||
	    ptr[1] != 1 ||
	    ptr[2] != HDMI_AUDIO_INFOFRAME_SIZE) {
		return -EINVAL;
	}

	if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(AUDIO)) != 0)
		return -EINVAL;

	ret = hdmi_audio_infoframe_init(frame);
	if (ret)
		return ret;

	ptr += HDMI_INFOFRAME_HEADER_SIZE;

	frame->channels = ptr[0] & 0x7;
	frame->coding_type = (ptr[0] >> 4) & 0xf;
	frame->sample_size = ptr[1] & 0x3;
	frame->sample_frequency = (ptr[1] >> 2) & 0x7;
	frame->coding_type_ext = ptr[2] & 0x1f;
	frame->channel_allocation = ptr[3];
	frame->level_shift_value = (ptr[4] >> 3) & 0xf;
	frame->downmix_inhibit = ptr[4] & 0x80 ? true : false;

	return 0;
}

/**
 * hdmi_vendor_infoframe_unpack() - unpack binary buffer to a HDMI vendor infoframe
 * @frame: HDMI Vendor infoframe
 * @buffer: source buffer
 * @size: size of buffer
 *
 * Unpacks the information contained in binary @buffer into a structured
 * @frame of the HDMI Vendor information frame.
 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
 * specification.
 *
 * Returns 0 on success or a negative error code on failure.
 */
static int
hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame,
				 const void *buffer, size_t size)
{
	const u8 *ptr = buffer;
	size_t length;
	int ret;
	u8 hdmi_video_format;
	struct hdmi_vendor_infoframe *hvf = &frame->hdmi;

	if (size < HDMI_INFOFRAME_HEADER_SIZE)
		return -EINVAL;

	if (ptr[0] != HDMI_INFOFRAME_TYPE_VENDOR ||
	    ptr[1] != 1 ||
	    (ptr[2] != 4 && ptr[2] != 5 && ptr[2] != 6))
		return -EINVAL;

	length = ptr[2];

	if (size < HDMI_INFOFRAME_HEADER_SIZE + length)
		return -EINVAL;

	if (hdmi_infoframe_checksum(buffer,
				    HDMI_INFOFRAME_HEADER_SIZE + length) != 0)
		return -EINVAL;

	ptr += HDMI_INFOFRAME_HEADER_SIZE;

	/* HDMI OUI */
	if ((ptr[0] != 0x03) ||
	    (ptr[1] != 0x0c) ||
	    (ptr[2] != 0x00))
		return -EINVAL;

	hdmi_video_format = ptr[3] >> 5;

	if (hdmi_video_format > 0x2)
		return -EINVAL;

	ret = hdmi_vendor_infoframe_init(hvf);
	if (ret)
		return ret;

	hvf->length = length;

	if (hdmi_video_format == 0x2) {
		if (length != 5 && length != 6)
			return -EINVAL;
		hvf->s3d_struct = ptr[4] >> 4;
		if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF) {
			if (length != 6)
				return -EINVAL;
			hvf->s3d_ext_data = ptr[5] >> 4;
		}
	} else if (hdmi_video_format == 0x1) {
		if (length != 5)
			return -EINVAL;
		hvf->vic = ptr[4];
	} else {
		if (length != 4)
			return -EINVAL;
	}

	return 0;
}

/**
 * hdmi_drm_infoframe_unpack_only() - unpack binary buffer of CTA-861-G DRM
 *                                    infoframe DataBytes to a HDMI DRM
 *                                    infoframe
 * @frame: HDMI DRM infoframe
 * @buffer: source buffer
 * @size: size of buffer
 *
 * Unpacks CTA-861-G DRM infoframe DataBytes contained in the binary @buffer
 * into a structured @frame of the HDMI Dynamic Range and Mastering (DRM)
 * infoframe.
 *
 * Returns 0 on success or a negative error code on failure.
 */
int hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe *frame,
				   const void *buffer, size_t size)
{
	const u8 *ptr = buffer;
	const u8 *temp;
	u8 x_lsb, x_msb;
	u8 y_lsb, y_msb;
	int ret;
	int i;

	if (size < HDMI_DRM_INFOFRAME_SIZE)
		return -EINVAL;

	ret = hdmi_drm_infoframe_init(frame);
	if (ret)
		return ret;

	frame->eotf = ptr[0] & 0x7;
	frame->metadata_type = ptr[1] & 0x7;

	temp = ptr + 2;
	for (i = 0; i < 3; i++) {
		x_lsb = *temp++;
		x_msb = *temp++;
		frame->display_primaries[i].x = (x_msb << 8) | x_lsb;
		y_lsb = *temp++;
		y_msb = *temp++;
		frame->display_primaries[i].y = (y_msb << 8) | y_lsb;
	}

	frame->white_point.x = (ptr[15] << 8) | ptr[14];
	frame->white_point.y = (ptr[17] << 8) | ptr[16];

	frame->max_display_mastering_luminance = (ptr[19] << 8) | ptr[18];
	frame->min_display_mastering_luminance = (ptr[21] << 8) | ptr[20];
	frame->max_cll = (ptr[23] << 8) | ptr[22];
	frame->max_fall = (ptr[25] << 8) | ptr[24];

	return 0;
}
EXPORT_SYMBOL(hdmi_drm_infoframe_unpack_only);

/**
 * hdmi_drm_infoframe_unpack() - unpack binary buffer to a HDMI DRM infoframe
 * @frame: HDMI DRM infoframe
 * @buffer: source buffer
 * @size: size of buffer
 *
 * Unpacks the CTA-861-G DRM infoframe contained in the binary @buffer into
 * a structured @frame of the HDMI Dynamic Range and Mastering (DRM)
 * infoframe. It also verifies the checksum as required by section 5.3.5 of
 * the HDMI 1.4 specification.
 *
 * Returns 0 on success or a negative error code on failure.
 */
static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
				     const void *buffer, size_t size)
{
	const u8 *ptr = buffer;
	int ret;

	if (size < HDMI_INFOFRAME_SIZE(DRM))
		return -EINVAL;

	if (ptr[0] != HDMI_INFOFRAME_TYPE_DRM ||
	    ptr[1] != 1 ||
	    ptr[2] != HDMI_DRM_INFOFRAME_SIZE)
		return -EINVAL;

	if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(DRM)) != 0)
		return -EINVAL;

	ret = hdmi_drm_infoframe_unpack_only(frame, ptr + HDMI_INFOFRAME_HEADER_SIZE,
					     size - HDMI_INFOFRAME_HEADER_SIZE);
	return ret;
}

/**
 * hdmi_infoframe_unpack() - unpack binary buffer to a HDMI infoframe
 * @frame: HDMI infoframe
 * @buffer: source buffer
 * @size: size of buffer
 *
 * Unpacks the information contained in binary buffer @buffer into a structured
 * @frame of a HDMI infoframe.
 * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
 * specification.
 *
 * Returns 0 on success or a negative error code on failure.
 */
int hdmi_infoframe_unpack(union hdmi_infoframe *frame,
			  const void *buffer, size_t size)
{
	int ret;
	const u8 *ptr = buffer;

	if (size < HDMI_INFOFRAME_HEADER_SIZE)
		return -EINVAL;

	switch (ptr[0]) {
	case HDMI_INFOFRAME_TYPE_AVI:
		ret = hdmi_avi_infoframe_unpack(&frame->avi, buffer, size);
		break;
	case HDMI_INFOFRAME_TYPE_DRM:
		ret = hdmi_drm_infoframe_unpack(&frame->drm, buffer, size);
		break;
	case HDMI_INFOFRAME_TYPE_SPD:
		ret = hdmi_spd_infoframe_unpack(&frame->spd, buffer, size);
		break;
	case HDMI_INFOFRAME_TYPE_AUDIO:
		ret = hdmi_audio_infoframe_unpack(&frame->audio, buffer, size);
		break;
	case HDMI_INFOFRAME_TYPE_VENDOR:
		ret = hdmi_vendor_any_infoframe_unpack(&frame->vendor, buffer, size);
		break;
	default:
		ret = -EINVAL;
		break;
	}

	return ret;
}
EXPORT_SYMBOL(hdmi_infoframe_unpack);