summaryrefslogtreecommitdiffstats
path: root/sound/soc/codecs/hdac_hdmi.c
blob: e808f94bf8d11871dc1db8a182a429b32b04addc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
/*
 *  hdac_hdmi.c - ASoc HDA-HDMI codec driver for Intel platforms
 *
 *  Copyright (C) 2014-2015 Intel Corp
 *  Author: Samreen Nilofer <samreen.nilofer@intel.com>
 *	    Subhransu S. Prusty <subhransu.s.prusty@intel.com>
 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; version 2 of the License.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/hdmi.h>
#include <drm/drm_edid.h>
#include <sound/pcm_params.h>
#include <sound/jack.h>
#include <sound/soc.h>
#include <sound/hdaudio_ext.h>
#include <sound/hda_i915.h>
#include <sound/pcm_drm_eld.h>
#include <sound/hda_chmap.h>
#include "../../hda/local.h"
#include "hdac_hdmi.h"

#define NAME_SIZE	32

#define AMP_OUT_MUTE		0xb080
#define AMP_OUT_UNMUTE		0xb000
#define PIN_OUT			(AC_PINCTL_OUT_EN)

#define HDA_MAX_CONNECTIONS     32

#define HDA_MAX_CVTS		3
#define HDA_MAX_PORTS		3

#define ELD_MAX_SIZE    256
#define ELD_FIXED_BYTES	20

#define ELD_VER_CEA_861D 2
#define ELD_VER_PARTIAL 31
#define ELD_MAX_MNL     16

struct hdac_hdmi_cvt_params {
	unsigned int channels_min;
	unsigned int channels_max;
	u32 rates;
	u64 formats;
	unsigned int maxbps;
};

struct hdac_hdmi_cvt {
	struct list_head head;
	hda_nid_t nid;
	const char *name;
	struct hdac_hdmi_cvt_params params;
};

/* Currently only spk_alloc, more to be added */
struct hdac_hdmi_parsed_eld {
	u8 spk_alloc;
};

struct hdac_hdmi_eld {
	bool	monitor_present;
	bool	eld_valid;
	int	eld_size;
	char    eld_buffer[ELD_MAX_SIZE];
	struct	hdac_hdmi_parsed_eld info;
};

struct hdac_hdmi_pin {
	struct list_head head;
	hda_nid_t nid;
	bool mst_capable;
	struct hdac_hdmi_port *ports;
	int num_ports;
	struct hdac_ext_device *edev;
};

struct hdac_hdmi_port {
	struct list_head head;
	int id;
	struct hdac_hdmi_pin *pin;
	int num_mux_nids;
	hda_nid_t mux_nids[HDA_MAX_CONNECTIONS];
	struct hdac_hdmi_eld eld;
	const char *jack_pin;
	struct snd_soc_dapm_context *dapm;
	const char *output_pin;
};

struct hdac_hdmi_pcm {
	struct list_head head;
	int pcm_id;
	struct list_head port_list;
	struct hdac_hdmi_cvt *cvt;
	struct snd_soc_jack *jack;
	int stream_tag;
	int channels;
	int format;
	bool chmap_set;
	unsigned char chmap[8]; /* ALSA API channel-map */
	struct mutex lock;
	int jack_event;
};

struct hdac_hdmi_dai_port_map {
	int dai_id;
	struct hdac_hdmi_port *port;
	struct hdac_hdmi_cvt *cvt;
};

struct hdac_hdmi_priv {
	struct hdac_hdmi_dai_port_map dai_map[HDA_MAX_CVTS];
	struct list_head pin_list;
	struct list_head cvt_list;
	struct list_head pcm_list;
	int num_pin;
	int num_cvt;
	int num_ports;
	struct mutex pin_mutex;
	struct hdac_chmap chmap;
};

static struct hdac_hdmi_pcm *
hdac_hdmi_get_pcm_from_cvt(struct hdac_hdmi_priv *hdmi,
			   struct hdac_hdmi_cvt *cvt)
{
	struct hdac_hdmi_pcm *pcm = NULL;

	list_for_each_entry(pcm, &hdmi->pcm_list, head) {
		if (pcm->cvt == cvt)
			break;
	}

	return pcm;
}

static void hdac_hdmi_jack_report(struct hdac_hdmi_pcm *pcm,
		struct hdac_hdmi_port *port, bool is_connect)
{
	struct hdac_ext_device *edev = port->pin->edev;

	if (is_connect)
		snd_soc_dapm_enable_pin(port->dapm, port->jack_pin);
	else
		snd_soc_dapm_disable_pin(port->dapm, port->jack_pin);

	if (is_connect) {
		/*
		 * Report Jack connect event when a device is connected
		 * for the first time where same PCM is attached to multiple
		 * ports.
		 */
		if (pcm->jack_event == 0) {
			dev_dbg(&edev->hdac.dev,
					"jack report for pcm=%d\n",
					pcm->pcm_id);
			snd_soc_jack_report(pcm->jack, SND_JACK_AVOUT,
						SND_JACK_AVOUT);
		}
		pcm->jack_event++;
	} else {
		/*
		 * Report Jack disconnect event when a device is disconnected
		 * is the only last connected device when same PCM is attached
		 * to multiple ports.
		 */
		if (pcm->jack_event == 1)
			snd_soc_jack_report(pcm->jack, 0, SND_JACK_AVOUT);
		if (pcm->jack_event > 0)
			pcm->jack_event--;
	}

	snd_soc_dapm_sync(port->dapm);
}

/* MST supported verbs */
/*
 * Get the no devices that can be connected to a port on the Pin widget.
 */
static int hdac_hdmi_get_port_len(struct hdac_ext_device *hdac, hda_nid_t nid)
{
	unsigned int caps;
	unsigned int type, param;

	caps = get_wcaps(&hdac->hdac, nid);
	type = get_wcaps_type(caps);

	if (!(caps & AC_WCAP_DIGITAL) || (type != AC_WID_PIN))
		return 0;

	param = snd_hdac_read_parm_uncached(&hdac->hdac, nid,
					AC_PAR_DEVLIST_LEN);
	if (param == -1)
		return param;

	return param & AC_DEV_LIST_LEN_MASK;
}

/*
 * Get the port entry select on the pin. Return the port entry
 * id selected on the pin. Return 0 means the first port entry
 * is selected or MST is not supported.
 */
static int hdac_hdmi_port_select_get(struct hdac_ext_device *hdac,
					struct hdac_hdmi_port *port)
{
	return snd_hdac_codec_read(&hdac->hdac, port->pin->nid,
				0, AC_VERB_GET_DEVICE_SEL, 0);
}

/*
 * Sets the selected port entry for the configuring Pin widget verb.
 * returns error if port set is not equal to port get otherwise success
 */
static int hdac_hdmi_port_select_set(struct hdac_ext_device *hdac,
					struct hdac_hdmi_port *port)
{
	int num_ports;

	if (!port->pin->mst_capable)
		return 0;

	/* AC_PAR_DEVLIST_LEN is 0 based. */
	num_ports = hdac_hdmi_get_port_len(hdac, port->pin->nid);

	if (num_ports < 0)
		return -EIO;
	/*
	 * Device List Length is a 0 based integer value indicating the
	 * number of sink device that a MST Pin Widget can support.
	 */
	if (num_ports + 1  < port->id)
		return 0;

	snd_hdac_codec_write(&hdac->hdac, port->pin->nid, 0,
			AC_VERB_SET_DEVICE_SEL, port->id);

	if (port->id != hdac_hdmi_port_select_get(hdac, port))
		return -EIO;

	dev_dbg(&hdac->hdac.dev, "Selected the port=%d\n", port->id);

	return 0;
}

static struct hdac_hdmi_pcm *get_hdmi_pcm_from_id(struct hdac_hdmi_priv *hdmi,
						int pcm_idx)
{
	struct hdac_hdmi_pcm *pcm;

	list_for_each_entry(pcm, &hdmi->pcm_list, head) {
		if (pcm->pcm_id == pcm_idx)
			return pcm;
	}

	return NULL;
}

static inline struct hdac_ext_device *to_hda_ext_device(struct device *dev)
{
	struct hdac_device *hdac = dev_to_hdac_dev(dev);

	return to_ehdac_device(hdac);
}

static unsigned int sad_format(const u8 *sad)
{
	return ((sad[0] >> 0x3) & 0x1f);
}

static unsigned int sad_sample_bits_lpcm(const u8 *sad)
{
	return (sad[2] & 7);
}

static int hdac_hdmi_eld_limit_formats(struct snd_pcm_runtime *runtime,
						void *eld)
{
	u64 formats = SNDRV_PCM_FMTBIT_S16;
	int i;
	const u8 *sad, *eld_buf = eld;

	sad = drm_eld_sad(eld_buf);
	if (!sad)
		goto format_constraint;

	for (i = drm_eld_sad_count(eld_buf); i > 0; i--, sad += 3) {
		if (sad_format(sad) == 1) { /* AUDIO_CODING_TYPE_LPCM */

			/*
			 * the controller support 20 and 24 bits in 32 bit
			 * container so we set S32
			 */
			if (sad_sample_bits_lpcm(sad) & 0x6)
				formats |= SNDRV_PCM_FMTBIT_S32;
		}
	}

format_constraint:
	return snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT,
				formats);

}

static void
hdac_hdmi_set_dip_index(struct hdac_ext_device *hdac, hda_nid_t pin_nid,
				int packet_index, int byte_index)
{
	int val;

	val = (packet_index << 5) | (byte_index & 0x1f);

	snd_hdac_codec_write(&hdac->hdac, pin_nid, 0,
				AC_VERB_SET_HDMI_DIP_INDEX, val);
}

struct dp_audio_infoframe {
	u8 type; /* 0x84 */
	u8 len;  /* 0x1b */
	u8 ver;  /* 0x11 << 2 */

	u8 CC02_CT47;	/* match with HDMI infoframe from this on */
	u8 SS01_SF24;
	u8 CXT04;
	u8 CA;
	u8 LFEPBL01_LSV36_DM_INH7;
};

static int hdac_hdmi_setup_audio_infoframe(struct hdac_ext_device *hdac,
		   struct hdac_hdmi_pcm *pcm, struct hdac_hdmi_port *port)
{
	uint8_t buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AUDIO_INFOFRAME_SIZE];
	struct hdmi_audio_infoframe frame;
	struct hdac_hdmi_pin *pin = port->pin;
	struct dp_audio_infoframe dp_ai;
	struct hdac_hdmi_priv *hdmi = hdac->private_data;
	struct hdac_hdmi_cvt *cvt = pcm->cvt;
	u8 *dip;
	int ret;
	int i;
	const u8 *eld_buf;
	u8 conn_type;
	int channels, ca;

	ca = snd_hdac_channel_allocation(&hdac->hdac, port->eld.info.spk_alloc,
			pcm->channels, pcm->chmap_set, true, pcm->chmap);

	channels = snd_hdac_get_active_channels(ca);
	hdmi->chmap.ops.set_channel_count(&hdac->hdac, cvt->nid, channels);

	snd_hdac_setup_channel_mapping(&hdmi->chmap, pin->nid, false, ca,
				pcm->channels, pcm->chmap, pcm->chmap_set);

	eld_buf = port->eld.eld_buffer;
	conn_type = drm_eld_get_conn_type(eld_buf);

	switch (conn_type) {
	case DRM_ELD_CONN_TYPE_HDMI:
		hdmi_audio_infoframe_init(&frame);

		frame.channels = channels;
		frame.channel_allocation = ca;

		ret = hdmi_audio_infoframe_pack(&frame, buffer, sizeof(buffer));
		if (ret < 0)
			return ret;

		break;

	case DRM_ELD_CONN_TYPE_DP:
		memset(&dp_ai, 0, sizeof(dp_ai));
		dp_ai.type	= 0x84;
		dp_ai.len	= 0x1b;
		dp_ai.ver	= 0x11 << 2;
		dp_ai.CC02_CT47	= channels - 1;
		dp_ai.CA	= ca;

		dip = (u8 *)&dp_ai;
		break;

	default:
		dev_err(&hdac->hdac.dev, "Invalid connection type: %d\n",
						conn_type);
		return -EIO;
	}

	/* stop infoframe transmission */
	hdac_hdmi_set_dip_index(hdac, pin->nid, 0x0, 0x0);
	snd_hdac_codec_write(&hdac->hdac, pin->nid, 0,
			AC_VERB_SET_HDMI_DIP_XMIT, AC_DIPXMIT_DISABLE);


	/*  Fill infoframe. Index auto-incremented */
	hdac_hdmi_set_dip_index(hdac, pin->nid, 0x0, 0x0);
	if (conn_type == DRM_ELD_CONN_TYPE_HDMI) {
		for (i = 0; i < sizeof(buffer); i++)
			snd_hdac_codec_write(&hdac->hdac, pin->nid, 0,
				AC_VERB_SET_HDMI_DIP_DATA, buffer[i]);
	} else {
		for (i = 0; i < sizeof(dp_ai); i++)
			snd_hdac_codec_write(&hdac->hdac, pin->nid, 0,
				AC_VERB_SET_HDMI_DIP_DATA, dip[i]);
	}

	/* Start infoframe */
	hdac_hdmi_set_dip_index(hdac, pin->nid, 0x0, 0x0);
	snd_hdac_codec_write(&hdac->hdac, pin->nid, 0,
			AC_VERB_SET_HDMI_DIP_XMIT, AC_DIPXMIT_BEST);

	return 0;
}

static int hdac_hdmi_set_tdm_slot(struct snd_soc_dai *dai,
		unsigned int tx_mask, unsigned int rx_mask,
		int slots, int slot_width)
{
	struct hdac_ext_device *edev = snd_soc_dai_get_drvdata(dai);
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_hdmi_dai_port_map *dai_map;
	struct hdac_hdmi_pcm *pcm;

	dev_dbg(&edev->hdac.dev, "%s: strm_tag: %d\n", __func__, tx_mask);

	dai_map = &hdmi->dai_map[dai->id];

	pcm = hdac_hdmi_get_pcm_from_cvt(hdmi, dai_map->cvt);

	if (pcm)
		pcm->stream_tag = (tx_mask << 4);

	return 0;
}

static int hdac_hdmi_set_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *hparams, struct snd_soc_dai *dai)
{
	struct hdac_ext_device *hdac = snd_soc_dai_get_drvdata(dai);
	struct hdac_hdmi_priv *hdmi = hdac->private_data;
	struct hdac_hdmi_dai_port_map *dai_map;
	struct hdac_hdmi_port *port;
	struct hdac_hdmi_pcm *pcm;
	int format;

	dai_map = &hdmi->dai_map[dai->id];
	port = dai_map->port;

	if (!port)
		return -ENODEV;

	if ((!port->eld.monitor_present) || (!port->eld.eld_valid)) {
		dev_err(&hdac->hdac.dev,
			"device is not configured for this pin:port%d:%d\n",
					port->pin->nid, port->id);
		return -ENODEV;
	}

	format = snd_hdac_calc_stream_format(params_rate(hparams),
			params_channels(hparams), params_format(hparams),
			dai->driver->playback.sig_bits, 0);

	pcm = hdac_hdmi_get_pcm_from_cvt(hdmi, dai_map->cvt);
	if (!pcm)
		return -EIO;

	pcm->format = format;
	pcm->channels = params_channels(hparams);

	return 0;
}

static int hdac_hdmi_query_port_connlist(struct hdac_ext_device *hdac,
					struct hdac_hdmi_pin *pin,
					struct hdac_hdmi_port *port)
{
	if (!(get_wcaps(&hdac->hdac, pin->nid) & AC_WCAP_CONN_LIST)) {
		dev_warn(&hdac->hdac.dev,
			"HDMI: pin %d wcaps %#x does not support connection list\n",
			pin->nid, get_wcaps(&hdac->hdac, pin->nid));
		return -EINVAL;
	}

	if (hdac_hdmi_port_select_set(hdac, port) < 0)
		return -EIO;

	port->num_mux_nids = snd_hdac_get_connections(&hdac->hdac, pin->nid,
			port->mux_nids, HDA_MAX_CONNECTIONS);
	if (port->num_mux_nids == 0)
		dev_warn(&hdac->hdac.dev,
			"No connections found for pin:port %d:%d\n",
						pin->nid, port->id);

	dev_dbg(&hdac->hdac.dev, "num_mux_nids %d for pin:port %d:%d\n",
			port->num_mux_nids, pin->nid, port->id);

	return port->num_mux_nids;
}

/*
 * Query pcm list and return port to which stream is routed.
 *
 * Also query connection list of the pin, to validate the cvt to port map.
 *
 * Same stream rendering to multiple ports simultaneously can be done
 * possibly, but not supported for now in driver. So return the first port
 * connected.
 */
static struct hdac_hdmi_port *hdac_hdmi_get_port_from_cvt(
			struct hdac_ext_device *edev,
			struct hdac_hdmi_priv *hdmi,
			struct hdac_hdmi_cvt *cvt)
{
	struct hdac_hdmi_pcm *pcm;
	struct hdac_hdmi_port *port = NULL;
	int ret, i;

	list_for_each_entry(pcm, &hdmi->pcm_list, head) {
		if (pcm->cvt == cvt) {
			if (list_empty(&pcm->port_list))
				continue;

			list_for_each_entry(port, &pcm->port_list, head) {
				mutex_lock(&pcm->lock);
				ret = hdac_hdmi_query_port_connlist(edev,
							port->pin, port);
				mutex_unlock(&pcm->lock);
				if (ret < 0)
					continue;

				for (i = 0; i < port->num_mux_nids; i++) {
					if (port->mux_nids[i] == cvt->nid &&
						port->eld.monitor_present &&
						port->eld.eld_valid)
						return port;
				}
			}
		}
	}

	return NULL;
}

/*
 * This tries to get a valid pin and set the HW constraints based on the
 * ELD. Even if a valid pin is not found return success so that device open
 * doesn't fail.
 */
static int hdac_hdmi_pcm_open(struct snd_pcm_substream *substream,
			struct snd_soc_dai *dai)
{
	struct hdac_ext_device *hdac = snd_soc_dai_get_drvdata(dai);
	struct hdac_hdmi_priv *hdmi = hdac->private_data;
	struct hdac_hdmi_dai_port_map *dai_map;
	struct hdac_hdmi_cvt *cvt;
	struct hdac_hdmi_port *port;
	int ret;

	dai_map = &hdmi->dai_map[dai->id];

	cvt = dai_map->cvt;
	port = hdac_hdmi_get_port_from_cvt(hdac, hdmi, cvt);

	/*
	 * To make PA and other userland happy.
	 * userland scans devices so returning error does not help.
	 */
	if (!port)
		return 0;
	if ((!port->eld.monitor_present) ||
			(!port->eld.eld_valid)) {

		dev_warn(&hdac->hdac.dev,
			"Failed: present?:%d ELD valid?:%d pin:port: %d:%d\n",
			port->eld.monitor_present, port->eld.eld_valid,
			port->pin->nid, port->id);

		return 0;
	}

	dai_map->port = port;

	ret = hdac_hdmi_eld_limit_formats(substream->runtime,
				port->eld.eld_buffer);
	if (ret < 0)
		return ret;

	return snd_pcm_hw_constraint_eld(substream->runtime,
				port->eld.eld_buffer);
}

static void hdac_hdmi_pcm_close(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
{
	struct hdac_ext_device *hdac = snd_soc_dai_get_drvdata(dai);
	struct hdac_hdmi_priv *hdmi = hdac->private_data;
	struct hdac_hdmi_dai_port_map *dai_map;
	struct hdac_hdmi_pcm *pcm;

	dai_map = &hdmi->dai_map[dai->id];

	pcm = hdac_hdmi_get_pcm_from_cvt(hdmi, dai_map->cvt);

	if (pcm) {
		mutex_lock(&pcm->lock);
		pcm->chmap_set = false;
		memset(pcm->chmap, 0, sizeof(pcm->chmap));
		pcm->channels = 0;
		mutex_unlock(&pcm->lock);
	}

	if (dai_map->port)
		dai_map->port = NULL;
}

static int
hdac_hdmi_query_cvt_params(struct hdac_device *hdac, struct hdac_hdmi_cvt *cvt)
{
	unsigned int chans;
	struct hdac_ext_device *edev = to_ehdac_device(hdac);
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	int err;

	chans = get_wcaps(hdac, cvt->nid);
	chans = get_wcaps_channels(chans);

	cvt->params.channels_min = 2;

	cvt->params.channels_max = chans;
	if (chans > hdmi->chmap.channels_max)
		hdmi->chmap.channels_max = chans;

	err = snd_hdac_query_supported_pcm(hdac, cvt->nid,
			&cvt->params.rates,
			&cvt->params.formats,
			&cvt->params.maxbps);
	if (err < 0)
		dev_err(&hdac->dev,
			"Failed to query pcm params for nid %d: %d\n",
			cvt->nid, err);

	return err;
}

static int hdac_hdmi_fill_widget_info(struct device *dev,
		struct snd_soc_dapm_widget *w, enum snd_soc_dapm_type id,
		void *priv, const char *wname, const char *stream,
		struct snd_kcontrol_new *wc, int numkc,
		int (*event)(struct snd_soc_dapm_widget *,
		struct snd_kcontrol *, int), unsigned short event_flags)
{
	w->id = id;
	w->name = devm_kstrdup(dev, wname, GFP_KERNEL);
	if (!w->name)
		return -ENOMEM;

	w->sname = stream;
	w->reg = SND_SOC_NOPM;
	w->shift = 0;
	w->kcontrol_news = wc;
	w->num_kcontrols = numkc;
	w->priv = priv;
	w->event = event;
	w->event_flags = event_flags;

	return 0;
}

static void hdac_hdmi_fill_route(struct snd_soc_dapm_route *route,
		const char *sink, const char *control, const char *src,
		int (*handler)(struct snd_soc_dapm_widget *src,
			struct snd_soc_dapm_widget *sink))
{
	route->sink = sink;
	route->source = src;
	route->control = control;
	route->connected = handler;
}

static struct hdac_hdmi_pcm *hdac_hdmi_get_pcm(struct hdac_ext_device *edev,
					struct hdac_hdmi_port *port)
{
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_hdmi_pcm *pcm = NULL;
	struct hdac_hdmi_port *p;

	list_for_each_entry(pcm, &hdmi->pcm_list, head) {
		if (list_empty(&pcm->port_list))
			continue;

		list_for_each_entry(p, &pcm->port_list, head) {
			if (p->id == port->id && port->pin == p->pin)
				return pcm;
		}
	}

	return NULL;
}

static void hdac_hdmi_set_power_state(struct hdac_ext_device *edev,
			     hda_nid_t nid, unsigned int pwr_state)
{
	if (get_wcaps(&edev->hdac, nid) & AC_WCAP_POWER) {
		if (!snd_hdac_check_power_state(&edev->hdac, nid, pwr_state))
			snd_hdac_codec_write(&edev->hdac, nid, 0,
				AC_VERB_SET_POWER_STATE, pwr_state);
	}
}

static void hdac_hdmi_set_amp(struct hdac_ext_device *edev,
				   hda_nid_t nid, int val)
{
	if (get_wcaps(&edev->hdac, nid) & AC_WCAP_OUT_AMP)
		snd_hdac_codec_write(&edev->hdac, nid, 0,
					AC_VERB_SET_AMP_GAIN_MUTE, val);
}


static int hdac_hdmi_pin_output_widget_event(struct snd_soc_dapm_widget *w,
					struct snd_kcontrol *kc, int event)
{
	struct hdac_hdmi_port *port = w->priv;
	struct hdac_ext_device *edev = to_hda_ext_device(w->dapm->dev);
	struct hdac_hdmi_pcm *pcm;

	dev_dbg(&edev->hdac.dev, "%s: widget: %s event: %x\n",
			__func__, w->name, event);

	pcm = hdac_hdmi_get_pcm(edev, port);
	if (!pcm)
		return -EIO;

	/* set the device if pin is mst_capable */
	if (hdac_hdmi_port_select_set(edev, port) < 0)
		return -EIO;

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		hdac_hdmi_set_power_state(edev, port->pin->nid, AC_PWRST_D0);

		/* Enable out path for this pin widget */
		snd_hdac_codec_write(&edev->hdac, port->pin->nid, 0,
				AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT);

		hdac_hdmi_set_amp(edev, port->pin->nid, AMP_OUT_UNMUTE);

		return hdac_hdmi_setup_audio_infoframe(edev, pcm, port);

	case SND_SOC_DAPM_POST_PMD:
		hdac_hdmi_set_amp(edev, port->pin->nid, AMP_OUT_MUTE);

		/* Disable out path for this pin widget */
		snd_hdac_codec_write(&edev->hdac, port->pin->nid, 0,
				AC_VERB_SET_PIN_WIDGET_CONTROL, 0);

		hdac_hdmi_set_power_state(edev, port->pin->nid, AC_PWRST_D3);
		break;

	}

	return 0;
}

static int hdac_hdmi_cvt_output_widget_event(struct snd_soc_dapm_widget *w,
					struct snd_kcontrol *kc, int event)
{
	struct hdac_hdmi_cvt *cvt = w->priv;
	struct hdac_ext_device *edev = to_hda_ext_device(w->dapm->dev);
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_hdmi_pcm *pcm;

	dev_dbg(&edev->hdac.dev, "%s: widget: %s event: %x\n",
			__func__, w->name, event);

	pcm = hdac_hdmi_get_pcm_from_cvt(hdmi, cvt);
	if (!pcm)
		return -EIO;

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		hdac_hdmi_set_power_state(edev, cvt->nid, AC_PWRST_D0);

		/* Enable transmission */
		snd_hdac_codec_write(&edev->hdac, cvt->nid, 0,
			AC_VERB_SET_DIGI_CONVERT_1, 1);

		/* Category Code (CC) to zero */
		snd_hdac_codec_write(&edev->hdac, cvt->nid, 0,
			AC_VERB_SET_DIGI_CONVERT_2, 0);

		snd_hdac_codec_write(&edev->hdac, cvt->nid, 0,
				AC_VERB_SET_CHANNEL_STREAMID, pcm->stream_tag);
		snd_hdac_codec_write(&edev->hdac, cvt->nid, 0,
				AC_VERB_SET_STREAM_FORMAT, pcm->format);
		break;

	case SND_SOC_DAPM_POST_PMD:
		snd_hdac_codec_write(&edev->hdac, cvt->nid, 0,
				AC_VERB_SET_CHANNEL_STREAMID, 0);
		snd_hdac_codec_write(&edev->hdac, cvt->nid, 0,
				AC_VERB_SET_STREAM_FORMAT, 0);

		hdac_hdmi_set_power_state(edev, cvt->nid, AC_PWRST_D3);
		break;

	}

	return 0;
}

static int hdac_hdmi_pin_mux_widget_event(struct snd_soc_dapm_widget *w,
					struct snd_kcontrol *kc, int event)
{
	struct hdac_hdmi_port *port = w->priv;
	struct hdac_ext_device *edev = to_hda_ext_device(w->dapm->dev);
	int mux_idx;

	dev_dbg(&edev->hdac.dev, "%s: widget: %s event: %x\n",
			__func__, w->name, event);

	if (!kc)
		kc  = w->kcontrols[0];

	mux_idx = dapm_kcontrol_get_value(kc);

	/* set the device if pin is mst_capable */
	if (hdac_hdmi_port_select_set(edev, port) < 0)
		return -EIO;

	if (mux_idx > 0) {
		snd_hdac_codec_write(&edev->hdac, port->pin->nid, 0,
			AC_VERB_SET_CONNECT_SEL, (mux_idx - 1));
	}

	return 0;
}

/*
 * Based on user selection, map the PINs with the PCMs.
 */
static int hdac_hdmi_set_pin_port_mux(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	int ret;
	struct hdac_hdmi_port *p, *p_next;
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
	struct snd_soc_dapm_widget *w = snd_soc_dapm_kcontrol_widget(kcontrol);
	struct snd_soc_dapm_context *dapm = w->dapm;
	struct hdac_hdmi_port *port = w->priv;
	struct hdac_ext_device *edev = to_hda_ext_device(dapm->dev);
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_hdmi_pcm *pcm = NULL;
	const char *cvt_name =  e->texts[ucontrol->value.enumerated.item[0]];

	ret = snd_soc_dapm_put_enum_double(kcontrol, ucontrol);
	if (ret < 0)
		return ret;

	if (port == NULL)
		return -EINVAL;

	mutex_lock(&hdmi->pin_mutex);
	list_for_each_entry(pcm, &hdmi->pcm_list, head) {
		if (list_empty(&pcm->port_list))
			continue;

		list_for_each_entry_safe(p, p_next, &pcm->port_list, head) {
			if (p == port && p->id == port->id &&
					p->pin == port->pin) {
				hdac_hdmi_jack_report(pcm, port, false);
				list_del(&p->head);
			}
		}
	}

	/*
	 * Jack status is not reported during device probe as the
	 * PCMs are not registered by then. So report it here.
	 */
	list_for_each_entry(pcm, &hdmi->pcm_list, head) {
		if (!strcmp(cvt_name, pcm->cvt->name)) {
			list_add_tail(&port->head, &pcm->port_list);
			if (port->eld.monitor_present && port->eld.eld_valid) {
				hdac_hdmi_jack_report(pcm, port, true);
				mutex_unlock(&hdmi->pin_mutex);
				return ret;
			}
		}
	}
	mutex_unlock(&hdmi->pin_mutex);

	return ret;
}

/*
 * Ideally the Mux inputs should be based on the num_muxs enumerated, but
 * the display driver seem to be programming the connection list for the pin
 * widget runtime.
 *
 * So programming all the possible inputs for the mux, the user has to take
 * care of selecting the right one and leaving all other inputs selected to
 * "NONE"
 */
static int hdac_hdmi_create_pin_port_muxs(struct hdac_ext_device *edev,
				struct hdac_hdmi_port *port,
				struct snd_soc_dapm_widget *widget,
				const char *widget_name)
{
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_hdmi_pin *pin = port->pin;
	struct snd_kcontrol_new *kc;
	struct hdac_hdmi_cvt *cvt;
	struct soc_enum *se;
	char kc_name[NAME_SIZE];
	char mux_items[NAME_SIZE];
	/* To hold inputs to the Pin mux */
	char *items[HDA_MAX_CONNECTIONS];
	int i = 0;
	int num_items = hdmi->num_cvt + 1;

	kc = devm_kzalloc(&edev->hdac.dev, sizeof(*kc), GFP_KERNEL);
	if (!kc)
		return -ENOMEM;

	se = devm_kzalloc(&edev->hdac.dev, sizeof(*se), GFP_KERNEL);
	if (!se)
		return -ENOMEM;

	sprintf(kc_name, "Pin %d port %d Input", pin->nid, port->id);
	kc->name = devm_kstrdup(&edev->hdac.dev, kc_name, GFP_KERNEL);
	if (!kc->name)
		return -ENOMEM;

	kc->private_value = (long)se;
	kc->iface = SNDRV_CTL_ELEM_IFACE_MIXER;
	kc->access = 0;
	kc->info = snd_soc_info_enum_double;
	kc->put = hdac_hdmi_set_pin_port_mux;
	kc->get = snd_soc_dapm_get_enum_double;

	se->reg = SND_SOC_NOPM;

	/* enum texts: ["NONE", "cvt #", "cvt #", ...] */
	se->items = num_items;
	se->mask = roundup_pow_of_two(se->items) - 1;

	sprintf(mux_items, "NONE");
	items[i] = devm_kstrdup(&edev->hdac.dev, mux_items, GFP_KERNEL);
	if (!items[i])
		return -ENOMEM;

	list_for_each_entry(cvt, &hdmi->cvt_list, head) {
		i++;
		sprintf(mux_items, "cvt %d", cvt->nid);
		items[i] = devm_kstrdup(&edev->hdac.dev, mux_items, GFP_KERNEL);
		if (!items[i])
			return -ENOMEM;
	}

	se->texts = devm_kmemdup(&edev->hdac.dev, items,
			(num_items  * sizeof(char *)), GFP_KERNEL);
	if (!se->texts)
		return -ENOMEM;

	return hdac_hdmi_fill_widget_info(&edev->hdac.dev, widget,
			snd_soc_dapm_mux, port, widget_name, NULL, kc, 1,
			hdac_hdmi_pin_mux_widget_event,
			SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_REG);
}

/* Add cvt <- input <- mux route map */
static void hdac_hdmi_add_pinmux_cvt_route(struct hdac_ext_device *edev,
			struct snd_soc_dapm_widget *widgets,
			struct snd_soc_dapm_route *route, int rindex)
{
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	const struct snd_kcontrol_new *kc;
	struct soc_enum *se;
	int mux_index = hdmi->num_cvt + hdmi->num_ports;
	int i, j;

	for (i = 0; i < hdmi->num_ports; i++) {
		kc = widgets[mux_index].kcontrol_news;
		se = (struct soc_enum *)kc->private_value;
		for (j = 0; j < hdmi->num_cvt; j++) {
			hdac_hdmi_fill_route(&route[rindex],
					widgets[mux_index].name,
					se->texts[j + 1],
					widgets[j].name, NULL);

			rindex++;
		}

		mux_index++;
	}
}

/*
 * Widgets are added in the below sequence
 *	Converter widgets for num converters enumerated
 *	Pin-port widgets for num ports for Pins enumerated
 *	Pin-port mux widgets to represent connenction list of pin widget
 *
 * For each port, one Mux and One output widget is added
 * Total widgets elements = num_cvt + (num_ports * 2);
 *
 * Routes are added as below:
 *	pin-port mux -> pin (based on num_ports)
 *	cvt -> "Input sel control" -> pin-port_mux
 *
 * Total route elements:
 *	num_ports + (pin_muxes * num_cvt)
 */
static int create_fill_widget_route_map(struct snd_soc_dapm_context *dapm)
{
	struct snd_soc_dapm_widget *widgets;
	struct snd_soc_dapm_route *route;
	struct hdac_ext_device *edev = to_hda_ext_device(dapm->dev);
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct snd_soc_dai_driver *dai_drv = dapm->component->dai_drv;
	char widget_name[NAME_SIZE];
	struct hdac_hdmi_cvt *cvt;
	struct hdac_hdmi_pin *pin;
	int ret, i = 0, num_routes = 0, j;

	if (list_empty(&hdmi->cvt_list) || list_empty(&hdmi->pin_list))
		return -EINVAL;

	widgets = devm_kzalloc(dapm->dev, (sizeof(*widgets) *
				((2 * hdmi->num_ports) + hdmi->num_cvt)),
				GFP_KERNEL);

	if (!widgets)
		return -ENOMEM;

	/* DAPM widgets to represent each converter widget */
	list_for_each_entry(cvt, &hdmi->cvt_list, head) {
		sprintf(widget_name, "Converter %d", cvt->nid);
		ret = hdac_hdmi_fill_widget_info(dapm->dev, &widgets[i],
			snd_soc_dapm_aif_in, cvt,
			widget_name, dai_drv[i].playback.stream_name, NULL, 0,
			hdac_hdmi_cvt_output_widget_event,
			SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD);
		if (ret < 0)
			return ret;
		i++;
	}

	list_for_each_entry(pin, &hdmi->pin_list, head) {
		for (j = 0; j < pin->num_ports; j++) {
			sprintf(widget_name, "hif%d-%d Output",
				pin->nid, pin->ports[j].id);
			ret = hdac_hdmi_fill_widget_info(dapm->dev, &widgets[i],
					snd_soc_dapm_output, &pin->ports[j],
					widget_name, NULL, NULL, 0,
					hdac_hdmi_pin_output_widget_event,
					SND_SOC_DAPM_PRE_PMU |
					SND_SOC_DAPM_POST_PMD);
			if (ret < 0)
				return ret;
			pin->ports[j].output_pin = widgets[i].name;
			i++;
		}
	}

	/* DAPM widgets to represent the connection list to pin widget */
	list_for_each_entry(pin, &hdmi->pin_list, head) {
		for (j = 0; j < pin->num_ports; j++) {
			sprintf(widget_name, "Pin%d-Port%d Mux",
				pin->nid, pin->ports[j].id);
			ret = hdac_hdmi_create_pin_port_muxs(edev,
						&pin->ports[j], &widgets[i],
						widget_name);
			if (ret < 0)
				return ret;
			i++;

			/* For cvt to pin_mux mapping */
			num_routes += hdmi->num_cvt;

			/* For pin_mux to pin mapping */
			num_routes++;
		}
	}

	route = devm_kzalloc(dapm->dev, (sizeof(*route) * num_routes),
							GFP_KERNEL);
	if (!route)
		return -ENOMEM;

	i = 0;
	/* Add pin <- NULL <- mux route map */
	list_for_each_entry(pin, &hdmi->pin_list, head) {
		for (j = 0; j < pin->num_ports; j++) {
			int sink_index = i + hdmi->num_cvt;
			int src_index = sink_index + pin->num_ports *
						hdmi->num_pin;

			hdac_hdmi_fill_route(&route[i],
				widgets[sink_index].name, NULL,
				widgets[src_index].name, NULL);
			i++;
		}
	}

	hdac_hdmi_add_pinmux_cvt_route(edev, widgets, route, i);

	snd_soc_dapm_new_controls(dapm, widgets,
		((2 * hdmi->num_ports) + hdmi->num_cvt));

	snd_soc_dapm_add_routes(dapm, route, num_routes);
	snd_soc_dapm_new_widgets(dapm->card);

	return 0;

}

static int hdac_hdmi_init_dai_map(struct hdac_ext_device *edev)
{
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_hdmi_dai_port_map *dai_map;
	struct hdac_hdmi_cvt *cvt;
	int dai_id = 0;

	if (list_empty(&hdmi->cvt_list))
		return -EINVAL;

	list_for_each_entry(cvt, &hdmi->cvt_list, head) {
		dai_map = &hdmi->dai_map[dai_id];
		dai_map->dai_id = dai_id;
		dai_map->cvt = cvt;

		dai_id++;

		if (dai_id == HDA_MAX_CVTS) {
			dev_warn(&edev->hdac.dev,
				"Max dais supported: %d\n", dai_id);
			break;
		}
	}

	return 0;
}

static int hdac_hdmi_add_cvt(struct hdac_ext_device *edev, hda_nid_t nid)
{
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_hdmi_cvt *cvt;
	char name[NAME_SIZE];

	cvt = kzalloc(sizeof(*cvt), GFP_KERNEL);
	if (!cvt)
		return -ENOMEM;

	cvt->nid = nid;
	sprintf(name, "cvt %d", cvt->nid);
	cvt->name = kstrdup(name, GFP_KERNEL);

	list_add_tail(&cvt->head, &hdmi->cvt_list);
	hdmi->num_cvt++;

	return hdac_hdmi_query_cvt_params(&edev->hdac, cvt);
}

static int hdac_hdmi_parse_eld(struct hdac_ext_device *edev,
			struct hdac_hdmi_port *port)
{
	unsigned int ver, mnl;

	ver = (port->eld.eld_buffer[DRM_ELD_VER] & DRM_ELD_VER_MASK)
						>> DRM_ELD_VER_SHIFT;

	if (ver != ELD_VER_CEA_861D && ver != ELD_VER_PARTIAL) {
		dev_err(&edev->hdac.dev, "HDMI: Unknown ELD version %d\n", ver);
		return -EINVAL;
	}

	mnl = (port->eld.eld_buffer[DRM_ELD_CEA_EDID_VER_MNL] &
		DRM_ELD_MNL_MASK) >> DRM_ELD_MNL_SHIFT;

	if (mnl > ELD_MAX_MNL) {
		dev_err(&edev->hdac.dev, "HDMI: MNL Invalid %d\n", mnl);
		return -EINVAL;
	}

	port->eld.info.spk_alloc = port->eld.eld_buffer[DRM_ELD_SPEAKER];

	return 0;
}

static void hdac_hdmi_present_sense(struct hdac_hdmi_pin *pin,
				    struct hdac_hdmi_port *port)
{
	struct hdac_ext_device *edev = pin->edev;
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_hdmi_pcm *pcm;
	int size = 0;
	int port_id = -1;

	if (!hdmi)
		return;

	/*
	 * In case of non MST pin, get_eld info API expectes port
	 * to be -1.
	 */
	mutex_lock(&hdmi->pin_mutex);
	port->eld.monitor_present = false;

	if (pin->mst_capable)
		port_id = port->id;

	size = snd_hdac_acomp_get_eld(&edev->hdac, pin->nid, port_id,
				&port->eld.monitor_present,
				port->eld.eld_buffer,
				ELD_MAX_SIZE);

	if (size > 0) {
		size = min(size, ELD_MAX_SIZE);
		if (hdac_hdmi_parse_eld(edev, port) < 0)
			size = -EINVAL;
	}

	if (size > 0) {
		port->eld.eld_valid = true;
		port->eld.eld_size = size;
	} else {
		port->eld.eld_valid = false;
		port->eld.eld_size = 0;
	}

	pcm = hdac_hdmi_get_pcm(edev, port);

	if (!port->eld.monitor_present || !port->eld.eld_valid) {

		dev_err(&edev->hdac.dev, "%s: disconnect for pin:port %d:%d\n",
						__func__, pin->nid, port->id);

		/*
		 * PCMs are not registered during device probe, so don't
		 * report jack here. It will be done in usermode mux
		 * control select.
		 */
		if (pcm)
			hdac_hdmi_jack_report(pcm, port, false);

		mutex_unlock(&hdmi->pin_mutex);
		return;
	}

	if (port->eld.monitor_present && port->eld.eld_valid) {
		if (pcm)
			hdac_hdmi_jack_report(pcm, port, true);

		print_hex_dump_debug("ELD: ", DUMP_PREFIX_OFFSET, 16, 1,
			  port->eld.eld_buffer, port->eld.eld_size, false);

	}
	mutex_unlock(&hdmi->pin_mutex);
}

static int hdac_hdmi_add_ports(struct hdac_hdmi_priv *hdmi,
				struct hdac_hdmi_pin *pin)
{
	struct hdac_hdmi_port *ports;
	int max_ports = HDA_MAX_PORTS;
	int i;

	/*
	 * FIXME: max_port may vary for each platform, so pass this as
	 * as driver data or query from i915 interface when this API is
	 * implemented.
	 */

	ports = kcalloc(max_ports, sizeof(*ports), GFP_KERNEL);
	if (!ports)
		return -ENOMEM;

	for (i = 0; i < max_ports; i++) {
		ports[i].id = i;
		ports[i].pin = pin;
	}
	pin->ports = ports;
	pin->num_ports = max_ports;
	return 0;
}

static int hdac_hdmi_add_pin(struct hdac_ext_device *edev, hda_nid_t nid)
{
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_hdmi_pin *pin;
	int ret;

	pin = kzalloc(sizeof(*pin), GFP_KERNEL);
	if (!pin)
		return -ENOMEM;

	pin->nid = nid;
	pin->mst_capable = false;
	pin->edev = edev;
	ret = hdac_hdmi_add_ports(hdmi, pin);
	if (ret < 0)
		return ret;

	list_add_tail(&pin->head, &hdmi->pin_list);
	hdmi->num_pin++;
	hdmi->num_ports += pin->num_ports;

	return 0;
}

#define INTEL_VENDOR_NID 0x08
#define INTEL_GET_VENDOR_VERB 0xf81
#define INTEL_SET_VENDOR_VERB 0x781
#define INTEL_EN_DP12			0x02 /* enable DP 1.2 features */
#define INTEL_EN_ALL_PIN_CVTS	0x01 /* enable 2nd & 3rd pins and convertors */

static void hdac_hdmi_skl_enable_all_pins(struct hdac_device *hdac)
{
	unsigned int vendor_param;

	vendor_param = snd_hdac_codec_read(hdac, INTEL_VENDOR_NID, 0,
				INTEL_GET_VENDOR_VERB, 0);
	if (vendor_param == -1 || vendor_param & INTEL_EN_ALL_PIN_CVTS)
		return;

	vendor_param |= INTEL_EN_ALL_PIN_CVTS;
	vendor_param = snd_hdac_codec_read(hdac, INTEL_VENDOR_NID, 0,
				INTEL_SET_VENDOR_VERB, vendor_param);
	if (vendor_param == -1)
		return;
}

static void hdac_hdmi_skl_enable_dp12(struct hdac_device *hdac)
{
	unsigned int vendor_param;

	vendor_param = snd_hdac_codec_read(hdac, INTEL_VENDOR_NID, 0,
				INTEL_GET_VENDOR_VERB, 0);
	if (vendor_param == -1 || vendor_param & INTEL_EN_DP12)
		return;

	/* enable DP1.2 mode */
	vendor_param |= INTEL_EN_DP12;
	vendor_param = snd_hdac_codec_read(hdac, INTEL_VENDOR_NID, 0,
				INTEL_SET_VENDOR_VERB, vendor_param);
	if (vendor_param == -1)
		return;

}

static const struct snd_soc_dai_ops hdmi_dai_ops = {
	.startup = hdac_hdmi_pcm_open,
	.shutdown = hdac_hdmi_pcm_close,
	.hw_params = hdac_hdmi_set_hw_params,
	.set_tdm_slot = hdac_hdmi_set_tdm_slot,
};

/*
 * Each converter can support a stream independently. So a dai is created
 * based on the number of converter queried.
 */
static int hdac_hdmi_create_dais(struct hdac_device *hdac,
		struct snd_soc_dai_driver **dais,
		struct hdac_hdmi_priv *hdmi, int num_dais)
{
	struct snd_soc_dai_driver *hdmi_dais;
	struct hdac_hdmi_cvt *cvt;
	char name[NAME_SIZE], dai_name[NAME_SIZE];
	int i = 0;
	u32 rates, bps;
	unsigned int rate_max = 384000, rate_min = 8000;
	u64 formats;
	int ret;

	hdmi_dais = devm_kzalloc(&hdac->dev,
			(sizeof(*hdmi_dais) * num_dais),
			GFP_KERNEL);
	if (!hdmi_dais)
		return -ENOMEM;

	list_for_each_entry(cvt, &hdmi->cvt_list, head) {
		ret = snd_hdac_query_supported_pcm(hdac, cvt->nid,
					&rates,	&formats, &bps);
		if (ret)
			return ret;

		sprintf(dai_name, "intel-hdmi-hifi%d", i+1);
		hdmi_dais[i].name = devm_kstrdup(&hdac->dev,
					dai_name, GFP_KERNEL);

		if (!hdmi_dais[i].name)
			return -ENOMEM;

		snprintf(name, sizeof(name), "hifi%d", i+1);
		hdmi_dais[i].playback.stream_name =
				devm_kstrdup(&hdac->dev, name, GFP_KERNEL);
		if (!hdmi_dais[i].playback.stream_name)
			return -ENOMEM;

		/*
		 * Set caps based on capability queried from the converter.
		 * It will be constrained runtime based on ELD queried.
		 */
		hdmi_dais[i].playback.formats = formats;
		hdmi_dais[i].playback.rates = rates;
		hdmi_dais[i].playback.rate_max = rate_max;
		hdmi_dais[i].playback.rate_min = rate_min;
		hdmi_dais[i].playback.channels_min = 2;
		hdmi_dais[i].playback.channels_max = 2;
		hdmi_dais[i].playback.sig_bits = bps;
		hdmi_dais[i].ops = &hdmi_dai_ops;
		i++;
	}

	*dais = hdmi_dais;

	return 0;
}

/*
 * Parse all nodes and store the cvt/pin nids in array
 * Add one time initialization for pin and cvt widgets
 */
static int hdac_hdmi_parse_and_map_nid(struct hdac_ext_device *edev,
		struct snd_soc_dai_driver **dais, int *num_dais)
{
	hda_nid_t nid;
	int i, num_nodes;
	struct hdac_device *hdac = &edev->hdac;
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	int ret;

	hdac_hdmi_skl_enable_all_pins(hdac);
	hdac_hdmi_skl_enable_dp12(hdac);

	num_nodes = snd_hdac_get_sub_nodes(hdac, hdac->afg, &nid);
	if (!nid || num_nodes <= 0) {
		dev_warn(&hdac->dev, "HDMI: failed to get afg sub nodes\n");
		return -EINVAL;
	}

	hdac->num_nodes = num_nodes;
	hdac->start_nid = nid;

	for (i = 0; i < hdac->num_nodes; i++, nid++) {
		unsigned int caps;
		unsigned int type;

		caps = get_wcaps(hdac, nid);
		type = get_wcaps_type(caps);

		if (!(caps & AC_WCAP_DIGITAL))
			continue;

		switch (type) {

		case AC_WID_AUD_OUT:
			ret = hdac_hdmi_add_cvt(edev, nid);
			if (ret < 0)
				return ret;
			break;

		case AC_WID_PIN:
			ret = hdac_hdmi_add_pin(edev, nid);
			if (ret < 0)
				return ret;
			break;
		}
	}

	hdac->end_nid = nid;

	if (!hdmi->num_pin || !hdmi->num_cvt)
		return -EIO;

	ret = hdac_hdmi_create_dais(hdac, dais, hdmi, hdmi->num_cvt);
	if (ret) {
		dev_err(&hdac->dev, "Failed to create dais with err: %d\n",
							ret);
		return ret;
	}

	*num_dais = hdmi->num_cvt;

	return hdac_hdmi_init_dai_map(edev);
}

static void hdac_hdmi_eld_notify_cb(void *aptr, int port, int pipe)
{
	struct hdac_ext_device *edev = aptr;
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_hdmi_pin *pin = NULL;
	struct hdac_hdmi_port *hport = NULL;
	struct snd_soc_codec *codec = edev->scodec;
	int i;

	/* Don't know how this mapping is derived */
	hda_nid_t pin_nid = port + 0x04;

	dev_dbg(&edev->hdac.dev, "%s: for pin:%d port=%d\n", __func__,
							pin_nid, pipe);

	/*
	 * skip notification during system suspend (but not in runtime PM);
	 * the state will be updated at resume. Also since the ELD and
	 * connection states are updated in anyway at the end of the resume,
	 * we can skip it when received during PM process.
	 */
	if (snd_power_get_state(codec->component.card->snd_card) !=
			SNDRV_CTL_POWER_D0)
		return;

	if (atomic_read(&edev->hdac.in_pm))
		return;

	list_for_each_entry(pin, &hdmi->pin_list, head) {
		if (pin->nid != pin_nid)
			continue;

		/* In case of non MST pin, pipe is -1 */
		if (pipe == -1) {
			pin->mst_capable = false;
			/* if not MST, default is port[0] */
			hport = &pin->ports[0];
		} else {
			for (i = 0; i < pin->num_ports; i++) {
				pin->mst_capable = true;
				if (pin->ports[i].id == pipe) {
					hport = &pin->ports[i];
					break;
				}
			}
		}

		if (hport)
			hdac_hdmi_present_sense(pin, hport);
	}

}

static struct i915_audio_component_audio_ops aops = {
	.pin_eld_notify	= hdac_hdmi_eld_notify_cb,
};

static struct snd_pcm *hdac_hdmi_get_pcm_from_id(struct snd_soc_card *card,
						int device)
{
	struct snd_soc_pcm_runtime *rtd;

	list_for_each_entry(rtd, &card->rtd_list, list) {
		if (rtd->pcm && (rtd->pcm->device == device))
			return rtd->pcm;
	}

	return NULL;
}

/* create jack pin kcontrols */
static int create_fill_jack_kcontrols(struct snd_soc_card *card,
				    struct hdac_ext_device *edev)
{
	struct hdac_hdmi_pin *pin;
	struct snd_kcontrol_new *kc;
	char kc_name[NAME_SIZE], xname[NAME_SIZE];
	char *name;
	int i = 0, j;
	struct snd_soc_codec *codec = edev->scodec;
	struct hdac_hdmi_priv *hdmi = edev->private_data;

	kc = devm_kcalloc(codec->dev, hdmi->num_ports,
				sizeof(*kc), GFP_KERNEL);

	if (!kc)
		return -ENOMEM;

	list_for_each_entry(pin, &hdmi->pin_list, head) {
		for (j = 0; j < pin->num_ports; j++) {
			snprintf(xname, sizeof(xname), "hif%d-%d Jack",
						pin->nid, pin->ports[j].id);
			name = devm_kstrdup(codec->dev, xname, GFP_KERNEL);
			if (!name)
				return -ENOMEM;
			snprintf(kc_name, sizeof(kc_name), "%s Switch", xname);
			kc[i].name = devm_kstrdup(codec->dev, kc_name,
							GFP_KERNEL);
			if (!kc[i].name)
				return -ENOMEM;

			kc[i].private_value = (unsigned long)name;
			kc[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
			kc[i].access = 0;
			kc[i].info = snd_soc_dapm_info_pin_switch;
			kc[i].put = snd_soc_dapm_put_pin_switch;
			kc[i].get = snd_soc_dapm_get_pin_switch;
			i++;
		}
	}

	return snd_soc_add_card_controls(card, kc, i);
}

int hdac_hdmi_jack_port_init(struct snd_soc_codec *codec,
			struct snd_soc_dapm_context *dapm)
{
	struct hdac_ext_device *edev = snd_soc_codec_get_drvdata(codec);
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_hdmi_pin *pin;
	struct snd_soc_dapm_widget *widgets;
	struct snd_soc_dapm_route *route;
	char w_name[NAME_SIZE];
	int i = 0, j, ret;

	widgets = devm_kcalloc(dapm->dev, hdmi->num_ports,
				sizeof(*widgets), GFP_KERNEL);

	if (!widgets)
		return -ENOMEM;

	route = devm_kcalloc(dapm->dev, hdmi->num_ports,
				sizeof(*route), GFP_KERNEL);
	if (!route)
		return -ENOMEM;

	/* create Jack DAPM widget */
	list_for_each_entry(pin, &hdmi->pin_list, head) {
		for (j = 0; j < pin->num_ports; j++) {
			snprintf(w_name, sizeof(w_name), "hif%d-%d Jack",
						pin->nid, pin->ports[j].id);

			ret = hdac_hdmi_fill_widget_info(dapm->dev, &widgets[i],
					snd_soc_dapm_spk, NULL,
					w_name, NULL, NULL, 0, NULL, 0);
			if (ret < 0)
				return ret;

			pin->ports[j].jack_pin = widgets[i].name;
			pin->ports[j].dapm = dapm;

			/* add to route from Jack widget to output */
			hdac_hdmi_fill_route(&route[i], pin->ports[j].jack_pin,
					NULL, pin->ports[j].output_pin, NULL);

			i++;
		}
	}

	/* Add Route from Jack widget to the output widget */
	ret = snd_soc_dapm_new_controls(dapm, widgets, hdmi->num_ports);
	if (ret < 0)
		return ret;

	ret = snd_soc_dapm_add_routes(dapm, route, hdmi->num_ports);
	if (ret < 0)
		return ret;

	ret = snd_soc_dapm_new_widgets(dapm->card);
	if (ret < 0)
		return ret;

	/* Add Jack Pin switch Kcontrol */
	ret = create_fill_jack_kcontrols(dapm->card, edev);

	if (ret < 0)
		return ret;

	/* default set the Jack Pin switch to OFF */
	list_for_each_entry(pin, &hdmi->pin_list, head) {
		for (j = 0; j < pin->num_ports; j++)
			snd_soc_dapm_disable_pin(pin->ports[j].dapm,
						pin->ports[j].jack_pin);
	}

	return 0;
}
EXPORT_SYMBOL_GPL(hdac_hdmi_jack_port_init);

int hdac_hdmi_jack_init(struct snd_soc_dai *dai, int device,
				struct snd_soc_jack *jack)
{
	struct snd_soc_codec *codec = dai->codec;
	struct hdac_ext_device *edev = snd_soc_codec_get_drvdata(codec);
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_hdmi_pcm *pcm;
	struct snd_pcm *snd_pcm;
	int err;

	/*
	 * this is a new PCM device, create new pcm and
	 * add to the pcm list
	 */
	pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
	if (!pcm)
		return -ENOMEM;
	pcm->pcm_id = device;
	pcm->cvt = hdmi->dai_map[dai->id].cvt;
	pcm->jack_event = 0;
	pcm->jack = jack;
	mutex_init(&pcm->lock);
	INIT_LIST_HEAD(&pcm->port_list);
	snd_pcm = hdac_hdmi_get_pcm_from_id(dai->component->card, device);
	if (snd_pcm) {
		err = snd_hdac_add_chmap_ctls(snd_pcm, device, &hdmi->chmap);
		if (err < 0) {
			dev_err(&edev->hdac.dev,
				"chmap control add failed with err: %d for pcm: %d\n",
				err, device);
			kfree(pcm);
			return err;
		}
	}

	list_add_tail(&pcm->head, &hdmi->pcm_list);

	return 0;
}
EXPORT_SYMBOL_GPL(hdac_hdmi_jack_init);

static void hdac_hdmi_present_sense_all_pins(struct hdac_ext_device *edev,
			struct hdac_hdmi_priv *hdmi, bool detect_pin_caps)
{
	int i;
	struct hdac_hdmi_pin *pin;

	list_for_each_entry(pin, &hdmi->pin_list, head) {
		if (detect_pin_caps) {

			if (hdac_hdmi_get_port_len(edev, pin->nid)  == 0)
				pin->mst_capable = false;
			else
				pin->mst_capable = true;
		}

		for (i = 0; i < pin->num_ports; i++) {
			if (!pin->mst_capable && i > 0)
				continue;

			hdac_hdmi_present_sense(pin, &pin->ports[i]);
		}
	}
}

static int hdmi_codec_probe(struct snd_soc_codec *codec)
{
	struct hdac_ext_device *edev = snd_soc_codec_get_drvdata(codec);
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct snd_soc_dapm_context *dapm =
		snd_soc_component_get_dapm(&codec->component);
	struct hdac_ext_link *hlink = NULL;
	int ret;

	edev->scodec = codec;

	/*
	 * hold the ref while we probe, also no need to drop the ref on
	 * exit, we call pm_runtime_suspend() so that will do for us
	 */
	hlink = snd_hdac_ext_bus_get_link(edev->ebus, dev_name(&edev->hdac.dev));
	if (!hlink) {
		dev_err(&edev->hdac.dev, "hdac link not found\n");
		return -EIO;
	}

	snd_hdac_ext_bus_link_get(edev->ebus, hlink);

	ret = create_fill_widget_route_map(dapm);
	if (ret < 0)
		return ret;

	aops.audio_ptr = edev;
	ret = snd_hdac_i915_register_notifier(&aops);
	if (ret < 0) {
		dev_err(&edev->hdac.dev, "notifier register failed: err: %d\n",
				ret);
		return ret;
	}

	hdac_hdmi_present_sense_all_pins(edev, hdmi, true);
	/* Imp: Store the card pointer in hda_codec */
	edev->card = dapm->card->snd_card;

	/*
	 * hdac_device core already sets the state to active and calls
	 * get_noresume. So enable runtime and set the device to suspend.
	 */
	pm_runtime_enable(&edev->hdac.dev);
	pm_runtime_put(&edev->hdac.dev);
	pm_runtime_suspend(&edev->hdac.dev);

	return 0;
}

static int hdmi_codec_remove(struct snd_soc_codec *codec)
{
	struct hdac_ext_device *edev = snd_soc_codec_get_drvdata(codec);

	pm_runtime_disable(&edev->hdac.dev);
	return 0;
}

#ifdef CONFIG_PM
static int hdmi_codec_prepare(struct device *dev)
{
	struct hdac_ext_device *edev = to_hda_ext_device(dev);
	struct hdac_device *hdac = &edev->hdac;

	pm_runtime_get_sync(&edev->hdac.dev);

	/*
	 * Power down afg.
	 * codec_read is preferred over codec_write to set the power state.
	 * This way verb is send to set the power state and response
	 * is received. So setting power state is ensured without using loop
	 * to read the state.
	 */
	snd_hdac_codec_read(hdac, hdac->afg, 0,	AC_VERB_SET_POWER_STATE,
							AC_PWRST_D3);

	return 0;
}

static void hdmi_codec_complete(struct device *dev)
{
	struct hdac_ext_device *edev = to_hda_ext_device(dev);
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_device *hdac = &edev->hdac;

	/* Power up afg */
	snd_hdac_codec_read(hdac, hdac->afg, 0,	AC_VERB_SET_POWER_STATE,
							AC_PWRST_D0);

	hdac_hdmi_skl_enable_all_pins(&edev->hdac);
	hdac_hdmi_skl_enable_dp12(&edev->hdac);

	/*
	 * As the ELD notify callback request is not entertained while the
	 * device is in suspend state. Need to manually check detection of
	 * all pins here. pin capablity change is not support, so use the
	 * already set pin caps.
	 */
	hdac_hdmi_present_sense_all_pins(edev, hdmi, false);

	pm_runtime_put_sync(&edev->hdac.dev);
}
#else
#define hdmi_codec_prepare NULL
#define hdmi_codec_complete NULL
#endif

static const struct snd_soc_codec_driver hdmi_hda_codec = {
	.probe		= hdmi_codec_probe,
	.remove		= hdmi_codec_remove,
	.idle_bias_off	= true,
};

static void hdac_hdmi_get_chmap(struct hdac_device *hdac, int pcm_idx,
					unsigned char *chmap)
{
	struct hdac_ext_device *edev = to_ehdac_device(hdac);
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_hdmi_pcm *pcm = get_hdmi_pcm_from_id(hdmi, pcm_idx);

	memcpy(chmap, pcm->chmap, ARRAY_SIZE(pcm->chmap));
}

static void hdac_hdmi_set_chmap(struct hdac_device *hdac, int pcm_idx,
				unsigned char *chmap, int prepared)
{
	struct hdac_ext_device *edev = to_ehdac_device(hdac);
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_hdmi_pcm *pcm = get_hdmi_pcm_from_id(hdmi, pcm_idx);
	struct hdac_hdmi_port *port;

	if (list_empty(&pcm->port_list))
		return;

	mutex_lock(&pcm->lock);
	pcm->chmap_set = true;
	memcpy(pcm->chmap, chmap, ARRAY_SIZE(pcm->chmap));
	list_for_each_entry(port, &pcm->port_list, head)
		if (prepared)
			hdac_hdmi_setup_audio_infoframe(edev, pcm, port);
	mutex_unlock(&pcm->lock);
}

static bool is_hdac_hdmi_pcm_attached(struct hdac_device *hdac, int pcm_idx)
{
	struct hdac_ext_device *edev = to_ehdac_device(hdac);
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_hdmi_pcm *pcm = get_hdmi_pcm_from_id(hdmi, pcm_idx);

	if (list_empty(&pcm->port_list))
		return false;

	return true;
}

static int hdac_hdmi_get_spk_alloc(struct hdac_device *hdac, int pcm_idx)
{
	struct hdac_ext_device *edev = to_ehdac_device(hdac);
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_hdmi_pcm *pcm = get_hdmi_pcm_from_id(hdmi, pcm_idx);
	struct hdac_hdmi_port *port;

	if (list_empty(&pcm->port_list))
		return 0;

	port = list_first_entry(&pcm->port_list, struct hdac_hdmi_port, head);

	if (!port)
		return 0;

	if (!port || !port->eld.eld_valid)
		return 0;

	return port->eld.info.spk_alloc;
}

static int hdac_hdmi_dev_probe(struct hdac_ext_device *edev)
{
	struct hdac_device *codec = &edev->hdac;
	struct hdac_hdmi_priv *hdmi_priv;
	struct snd_soc_dai_driver *hdmi_dais = NULL;
	struct hdac_ext_link *hlink = NULL;
	int num_dais = 0;
	int ret = 0;

	/* hold the ref while we probe */
	hlink = snd_hdac_ext_bus_get_link(edev->ebus, dev_name(&edev->hdac.dev));
	if (!hlink) {
		dev_err(&edev->hdac.dev, "hdac link not found\n");
		return -EIO;
	}

	snd_hdac_ext_bus_link_get(edev->ebus, hlink);

	hdmi_priv = devm_kzalloc(&codec->dev, sizeof(*hdmi_priv), GFP_KERNEL);
	if (hdmi_priv == NULL)
		return -ENOMEM;

	edev->private_data = hdmi_priv;
	snd_hdac_register_chmap_ops(codec, &hdmi_priv->chmap);
	hdmi_priv->chmap.ops.get_chmap = hdac_hdmi_get_chmap;
	hdmi_priv->chmap.ops.set_chmap = hdac_hdmi_set_chmap;
	hdmi_priv->chmap.ops.is_pcm_attached = is_hdac_hdmi_pcm_attached;
	hdmi_priv->chmap.ops.get_spk_alloc = hdac_hdmi_get_spk_alloc;

	dev_set_drvdata(&codec->dev, edev);

	INIT_LIST_HEAD(&hdmi_priv->pin_list);
	INIT_LIST_HEAD(&hdmi_priv->cvt_list);
	INIT_LIST_HEAD(&hdmi_priv->pcm_list);
	mutex_init(&hdmi_priv->pin_mutex);

	/*
	 * Turned off in the runtime_suspend during the first explicit
	 * pm_runtime_suspend call.
	 */
	ret = snd_hdac_display_power(edev->hdac.bus, true);
	if (ret < 0) {
		dev_err(&edev->hdac.dev,
			"Cannot turn on display power on i915 err: %d\n",
			ret);
		return ret;
	}

	ret = hdac_hdmi_parse_and_map_nid(edev, &hdmi_dais, &num_dais);
	if (ret < 0) {
		dev_err(&codec->dev,
			"Failed in parse and map nid with err: %d\n", ret);
		return ret;
	}

	/* ASoC specific initialization */
	ret = snd_soc_register_codec(&codec->dev, &hdmi_hda_codec,
					hdmi_dais, num_dais);

	snd_hdac_ext_bus_link_put(edev->ebus, hlink);

	return ret;
}

static int hdac_hdmi_dev_remove(struct hdac_ext_device *edev)
{
	struct hdac_hdmi_priv *hdmi = edev->private_data;
	struct hdac_hdmi_pin *pin, *pin_next;
	struct hdac_hdmi_cvt *cvt, *cvt_next;
	struct hdac_hdmi_pcm *pcm, *pcm_next;
	struct hdac_hdmi_port *port, *port_next;
	int i;

	snd_soc_unregister_codec(&edev->hdac.dev);

	list_for_each_entry_safe(pcm, pcm_next, &hdmi->pcm_list, head) {
		pcm->cvt = NULL;
		if (list_empty(&pcm->port_list))
			continue;

		list_for_each_entry_safe(port, port_next,
					&pcm->port_list, head)
			list_del(&port->head);

		list_del(&pcm->head);
		kfree(pcm);
	}

	list_for_each_entry_safe(cvt, cvt_next, &hdmi->cvt_list, head) {
		list_del(&cvt->head);
		kfree(cvt->name);
		kfree(cvt);
	}

	list_for_each_entry_safe(pin, pin_next, &hdmi->pin_list, head) {
		for (i = 0; i < pin->num_ports; i++)
			pin->ports[i].pin = NULL;
		kfree(pin->ports);
		list_del(&pin->head);
		kfree(pin);
	}

	return 0;
}

#ifdef CONFIG_PM
static int hdac_hdmi_runtime_suspend(struct device *dev)
{
	struct hdac_ext_device *edev = to_hda_ext_device(dev);
	struct hdac_device *hdac = &edev->hdac;
	struct hdac_bus *bus = hdac->bus;
	struct hdac_ext_bus *ebus = hbus_to_ebus(bus);
	struct hdac_ext_link *hlink = NULL;
	int err;

	dev_dbg(dev, "Enter: %s\n", __func__);

	/* controller may not have been initialized for the first time */
	if (!bus)
		return 0;

	/*
	 * Power down afg.
	 * codec_read is preferred over codec_write to set the power state.
	 * This way verb is send to set the power state and response
	 * is received. So setting power state is ensured without using loop
	 * to read the state.
	 */
	snd_hdac_codec_read(hdac, hdac->afg, 0,	AC_VERB_SET_POWER_STATE,
							AC_PWRST_D3);
	err = snd_hdac_display_power(bus, false);
	if (err < 0) {
		dev_err(bus->dev, "Cannot turn on display power on i915\n");
		return err;
	}

	hlink = snd_hdac_ext_bus_get_link(ebus, dev_name(dev));
	if (!hlink) {
		dev_err(dev, "hdac link not found\n");
		return -EIO;
	}

	snd_hdac_ext_bus_link_put(ebus, hlink);

	return 0;
}

static int hdac_hdmi_runtime_resume(struct device *dev)
{
	struct hdac_ext_device *edev = to_hda_ext_device(dev);
	struct hdac_device *hdac = &edev->hdac;
	struct hdac_bus *bus = hdac->bus;
	struct hdac_ext_bus *ebus = hbus_to_ebus(bus);
	struct hdac_ext_link *hlink = NULL;
	int err;

	dev_dbg(dev, "Enter: %s\n", __func__);

	/* controller may not have been initialized for the first time */
	if (!bus)
		return 0;

	hlink = snd_hdac_ext_bus_get_link(ebus, dev_name(dev));
	if (!hlink) {
		dev_err(dev, "hdac link not found\n");
		return -EIO;
	}

	snd_hdac_ext_bus_link_get(ebus, hlink);

	err = snd_hdac_display_power(bus, true);
	if (err < 0) {
		dev_err(bus->dev, "Cannot turn on display power on i915\n");
		return err;
	}

	hdac_hdmi_skl_enable_all_pins(&edev->hdac);
	hdac_hdmi_skl_enable_dp12(&edev->hdac);

	/* Power up afg */
	snd_hdac_codec_read(hdac, hdac->afg, 0,	AC_VERB_SET_POWER_STATE,
							AC_PWRST_D0);

	return 0;
}
#else
#define hdac_hdmi_runtime_suspend NULL
#define hdac_hdmi_runtime_resume NULL
#endif

static const struct dev_pm_ops hdac_hdmi_pm = {
	SET_RUNTIME_PM_OPS(hdac_hdmi_runtime_suspend, hdac_hdmi_runtime_resume, NULL)
	.prepare = hdmi_codec_prepare,
	.complete = hdmi_codec_complete,
};

static const struct hda_device_id hdmi_list[] = {
	HDA_CODEC_EXT_ENTRY(0x80862809, 0x100000, "Skylake HDMI", 0),
	HDA_CODEC_EXT_ENTRY(0x8086280a, 0x100000, "Broxton HDMI", 0),
	HDA_CODEC_EXT_ENTRY(0x8086280b, 0x100000, "Kabylake HDMI", 0),
	HDA_CODEC_EXT_ENTRY(0x8086280d, 0x100000, "Geminilake HDMI", 0),
	{}
};

MODULE_DEVICE_TABLE(hdaudio, hdmi_list);

static struct hdac_ext_driver hdmi_driver = {
	. hdac = {
		.driver = {
			.name   = "HDMI HDA Codec",
			.pm = &hdac_hdmi_pm,
		},
		.id_table       = hdmi_list,
	},
	.probe          = hdac_hdmi_dev_probe,
	.remove         = hdac_hdmi_dev_remove,
};

static int __init hdmi_init(void)
{
	return snd_hda_ext_driver_register(&hdmi_driver);
}

static void __exit hdmi_exit(void)
{
	snd_hda_ext_driver_unregister(&hdmi_driver);
}

module_init(hdmi_init);
module_exit(hdmi_exit);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("HDMI HD codec");
MODULE_AUTHOR("Samreen Nilofer<samreen.nilofer@intel.com>");
MODULE_AUTHOR("Subhransu S. Prusty<subhransu.s.prusty@intel.com>");