summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/exynos/exynos_drm_dsi.c
blob: 3955f84dc89356b093b0d9749c9fe2a04008347a (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
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Samsung SoC MIPI DSI Master driver.
 *
 * Copyright (c) 2014 Samsung Electronics Co., Ltd
 *
 * Contacts: Tomasz Figa <t.figa@samsung.com>
*/

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/component.h>
#include <linux/gpio/consumer.h>
#include <linux/irq.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/of_graph.h>
#include <linux/phy/phy.h>
#include <linux/regulator/consumer.h>

#include <asm/unaligned.h>

#include <video/mipi_display.h>
#include <video/videomode.h>

#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_panel.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>

#include "exynos_drm_crtc.h"
#include "exynos_drm_drv.h"

/* returns true iff both arguments logically differs */
#define NEQV(a, b) (!(a) ^ !(b))

/* DSIM_STATUS */
#define DSIM_STOP_STATE_DAT(x)		(((x) & 0xf) << 0)
#define DSIM_STOP_STATE_CLK		(1 << 8)
#define DSIM_TX_READY_HS_CLK		(1 << 10)
#define DSIM_PLL_STABLE			(1 << 31)

/* DSIM_SWRST */
#define DSIM_FUNCRST			(1 << 16)
#define DSIM_SWRST			(1 << 0)

/* DSIM_TIMEOUT */
#define DSIM_LPDR_TIMEOUT(x)		((x) << 0)
#define DSIM_BTA_TIMEOUT(x)		((x) << 16)

/* DSIM_CLKCTRL */
#define DSIM_ESC_PRESCALER(x)		(((x) & 0xffff) << 0)
#define DSIM_ESC_PRESCALER_MASK		(0xffff << 0)
#define DSIM_LANE_ESC_CLK_EN_CLK	(1 << 19)
#define DSIM_LANE_ESC_CLK_EN_DATA(x)	(((x) & 0xf) << 20)
#define DSIM_LANE_ESC_CLK_EN_DATA_MASK	(0xf << 20)
#define DSIM_BYTE_CLKEN			(1 << 24)
#define DSIM_BYTE_CLK_SRC(x)		(((x) & 0x3) << 25)
#define DSIM_BYTE_CLK_SRC_MASK		(0x3 << 25)
#define DSIM_PLL_BYPASS			(1 << 27)
#define DSIM_ESC_CLKEN			(1 << 28)
#define DSIM_TX_REQUEST_HSCLK		(1 << 31)

/* DSIM_CONFIG */
#define DSIM_LANE_EN_CLK		(1 << 0)
#define DSIM_LANE_EN(x)			(((x) & 0xf) << 1)
#define DSIM_NUM_OF_DATA_LANE(x)	(((x) & 0x3) << 5)
#define DSIM_SUB_PIX_FORMAT(x)		(((x) & 0x7) << 8)
#define DSIM_MAIN_PIX_FORMAT_MASK	(0x7 << 12)
#define DSIM_MAIN_PIX_FORMAT_RGB888	(0x7 << 12)
#define DSIM_MAIN_PIX_FORMAT_RGB666	(0x6 << 12)
#define DSIM_MAIN_PIX_FORMAT_RGB666_P	(0x5 << 12)
#define DSIM_MAIN_PIX_FORMAT_RGB565	(0x4 << 12)
#define DSIM_SUB_VC			(((x) & 0x3) << 16)
#define DSIM_MAIN_VC			(((x) & 0x3) << 18)
#define DSIM_HSA_MODE			(1 << 20)
#define DSIM_HBP_MODE			(1 << 21)
#define DSIM_HFP_MODE			(1 << 22)
#define DSIM_HSE_MODE			(1 << 23)
#define DSIM_AUTO_MODE			(1 << 24)
#define DSIM_VIDEO_MODE			(1 << 25)
#define DSIM_BURST_MODE			(1 << 26)
#define DSIM_SYNC_INFORM		(1 << 27)
#define DSIM_EOT_DISABLE		(1 << 28)
#define DSIM_MFLUSH_VS			(1 << 29)
/* This flag is valid only for exynos3250/3472/5260/5430 */
#define DSIM_CLKLANE_STOP		(1 << 30)

/* DSIM_ESCMODE */
#define DSIM_TX_TRIGGER_RST		(1 << 4)
#define DSIM_TX_LPDT_LP			(1 << 6)
#define DSIM_CMD_LPDT_LP		(1 << 7)
#define DSIM_FORCE_BTA			(1 << 16)
#define DSIM_FORCE_STOP_STATE		(1 << 20)
#define DSIM_STOP_STATE_CNT(x)		(((x) & 0x7ff) << 21)
#define DSIM_STOP_STATE_CNT_MASK	(0x7ff << 21)

/* DSIM_MDRESOL */
#define DSIM_MAIN_STAND_BY		(1 << 31)
#define DSIM_MAIN_VRESOL(x, num_bits)	(((x) & ((1 << (num_bits)) - 1)) << 16)
#define DSIM_MAIN_HRESOL(x, num_bits)	(((x) & ((1 << (num_bits)) - 1)) << 0)

/* DSIM_MVPORCH */
#define DSIM_CMD_ALLOW(x)		((x) << 28)
#define DSIM_STABLE_VFP(x)		((x) << 16)
#define DSIM_MAIN_VBP(x)		((x) << 0)
#define DSIM_CMD_ALLOW_MASK		(0xf << 28)
#define DSIM_STABLE_VFP_MASK		(0x7ff << 16)
#define DSIM_MAIN_VBP_MASK		(0x7ff << 0)

/* DSIM_MHPORCH */
#define DSIM_MAIN_HFP(x)		((x) << 16)
#define DSIM_MAIN_HBP(x)		((x) << 0)
#define DSIM_MAIN_HFP_MASK		((0xffff) << 16)
#define DSIM_MAIN_HBP_MASK		((0xffff) << 0)

/* DSIM_MSYNC */
#define DSIM_MAIN_VSA(x)		((x) << 22)
#define DSIM_MAIN_HSA(x)		((x) << 0)
#define DSIM_MAIN_VSA_MASK		((0x3ff) << 22)
#define DSIM_MAIN_HSA_MASK		((0xffff) << 0)

/* DSIM_SDRESOL */
#define DSIM_SUB_STANDY(x)		((x) << 31)
#define DSIM_SUB_VRESOL(x)		((x) << 16)
#define DSIM_SUB_HRESOL(x)		((x) << 0)
#define DSIM_SUB_STANDY_MASK		((0x1) << 31)
#define DSIM_SUB_VRESOL_MASK		((0x7ff) << 16)
#define DSIM_SUB_HRESOL_MASK		((0x7ff) << 0)

/* DSIM_INTSRC */
#define DSIM_INT_PLL_STABLE		(1 << 31)
#define DSIM_INT_SW_RST_RELEASE		(1 << 30)
#define DSIM_INT_SFR_FIFO_EMPTY		(1 << 29)
#define DSIM_INT_SFR_HDR_FIFO_EMPTY	(1 << 28)
#define DSIM_INT_BTA			(1 << 25)
#define DSIM_INT_FRAME_DONE		(1 << 24)
#define DSIM_INT_RX_TIMEOUT		(1 << 21)
#define DSIM_INT_BTA_TIMEOUT		(1 << 20)
#define DSIM_INT_RX_DONE		(1 << 18)
#define DSIM_INT_RX_TE			(1 << 17)
#define DSIM_INT_RX_ACK			(1 << 16)
#define DSIM_INT_RX_ECC_ERR		(1 << 15)
#define DSIM_INT_RX_CRC_ERR		(1 << 14)

/* DSIM_FIFOCTRL */
#define DSIM_RX_DATA_FULL		(1 << 25)
#define DSIM_RX_DATA_EMPTY		(1 << 24)
#define DSIM_SFR_HEADER_FULL		(1 << 23)
#define DSIM_SFR_HEADER_EMPTY		(1 << 22)
#define DSIM_SFR_PAYLOAD_FULL		(1 << 21)
#define DSIM_SFR_PAYLOAD_EMPTY		(1 << 20)
#define DSIM_I80_HEADER_FULL		(1 << 19)
#define DSIM_I80_HEADER_EMPTY		(1 << 18)
#define DSIM_I80_PAYLOAD_FULL		(1 << 17)
#define DSIM_I80_PAYLOAD_EMPTY		(1 << 16)
#define DSIM_SD_HEADER_FULL		(1 << 15)
#define DSIM_SD_HEADER_EMPTY		(1 << 14)
#define DSIM_SD_PAYLOAD_FULL		(1 << 13)
#define DSIM_SD_PAYLOAD_EMPTY		(1 << 12)
#define DSIM_MD_HEADER_FULL		(1 << 11)
#define DSIM_MD_HEADER_EMPTY		(1 << 10)
#define DSIM_MD_PAYLOAD_FULL		(1 << 9)
#define DSIM_MD_PAYLOAD_EMPTY		(1 << 8)
#define DSIM_RX_FIFO			(1 << 4)
#define DSIM_SFR_FIFO			(1 << 3)
#define DSIM_I80_FIFO			(1 << 2)
#define DSIM_SD_FIFO			(1 << 1)
#define DSIM_MD_FIFO			(1 << 0)

/* DSIM_PHYACCHR */
#define DSIM_AFC_EN			(1 << 14)
#define DSIM_AFC_CTL(x)			(((x) & 0x7) << 5)

/* DSIM_PLLCTRL */
#define DSIM_FREQ_BAND(x)		((x) << 24)
#define DSIM_PLL_EN			(1 << 23)
#define DSIM_PLL_P(x)			((x) << 13)
#define DSIM_PLL_M(x)			((x) << 4)
#define DSIM_PLL_S(x)			((x) << 1)

/* DSIM_PHYCTRL */
#define DSIM_PHYCTRL_ULPS_EXIT(x)	(((x) & 0x1ff) << 0)
#define DSIM_PHYCTRL_B_DPHYCTL_VREG_LP	(1 << 30)
#define DSIM_PHYCTRL_B_DPHYCTL_SLEW_UP	(1 << 14)

/* DSIM_PHYTIMING */
#define DSIM_PHYTIMING_LPX(x)		((x) << 8)
#define DSIM_PHYTIMING_HS_EXIT(x)	((x) << 0)

/* DSIM_PHYTIMING1 */
#define DSIM_PHYTIMING1_CLK_PREPARE(x)	((x) << 24)
#define DSIM_PHYTIMING1_CLK_ZERO(x)	((x) << 16)
#define DSIM_PHYTIMING1_CLK_POST(x)	((x) << 8)
#define DSIM_PHYTIMING1_CLK_TRAIL(x)	((x) << 0)

/* DSIM_PHYTIMING2 */
#define DSIM_PHYTIMING2_HS_PREPARE(x)	((x) << 16)
#define DSIM_PHYTIMING2_HS_ZERO(x)	((x) << 8)
#define DSIM_PHYTIMING2_HS_TRAIL(x)	((x) << 0)

#define DSI_MAX_BUS_WIDTH		4
#define DSI_NUM_VIRTUAL_CHANNELS	4
#define DSI_TX_FIFO_SIZE		2048
#define DSI_RX_FIFO_SIZE		256
#define DSI_XFER_TIMEOUT_MS		100
#define DSI_RX_FIFO_EMPTY		0x30800002

#define OLD_SCLK_MIPI_CLK_NAME "pll_clk"

static char *clk_names[5] = { "bus_clk", "sclk_mipi",
	"phyclk_mipidphy0_bitclkdiv8", "phyclk_mipidphy0_rxclkesc0",
	"sclk_rgb_vclk_to_dsim0" };

enum exynos_dsi_transfer_type {
	EXYNOS_DSI_TX,
	EXYNOS_DSI_RX,
};

struct exynos_dsi_transfer {
	struct list_head list;
	struct completion completed;
	int result;
	struct mipi_dsi_packet packet;
	u16 flags;
	u16 tx_done;

	u8 *rx_payload;
	u16 rx_len;
	u16 rx_done;
};

#define DSIM_STATE_ENABLED		BIT(0)
#define DSIM_STATE_INITIALIZED		BIT(1)
#define DSIM_STATE_CMD_LPM		BIT(2)
#define DSIM_STATE_VIDOUT_AVAILABLE	BIT(3)

struct exynos_dsi_driver_data {
	const unsigned int *reg_ofs;
	unsigned int plltmr_reg;
	unsigned int has_freqband:1;
	unsigned int has_clklane_stop:1;
	unsigned int num_clks;
	unsigned int max_freq;
	unsigned int wait_for_reset;
	unsigned int num_bits_resol;
	const unsigned int *reg_values;
};

struct exynos_dsi {
	struct drm_encoder encoder;
	struct mipi_dsi_host dsi_host;
	struct drm_connector connector;
	struct drm_panel *panel;
	struct list_head bridge_chain;
	struct drm_bridge *out_bridge;
	struct device *dev;

	void __iomem *reg_base;
	struct phy *phy;
	struct clk **clks;
	struct regulator_bulk_data supplies[2];
	int irq;
	int te_gpio;

	u32 pll_clk_rate;
	u32 burst_clk_rate;
	u32 esc_clk_rate;
	u32 lanes;
	u32 mode_flags;
	u32 format;

	int state;
	struct drm_property *brightness;
	struct completion completed;

	spinlock_t transfer_lock; /* protects transfer_list */
	struct list_head transfer_list;

	const struct exynos_dsi_driver_data *driver_data;
	struct device_node *in_bridge_node;
};

#define host_to_dsi(host) container_of(host, struct exynos_dsi, dsi_host)
#define connector_to_dsi(c) container_of(c, struct exynos_dsi, connector)

static inline struct exynos_dsi *encoder_to_dsi(struct drm_encoder *e)
{
	return container_of(e, struct exynos_dsi, encoder);
}

enum reg_idx {
	DSIM_STATUS_REG,	/* Status register */
	DSIM_SWRST_REG,		/* Software reset register */
	DSIM_CLKCTRL_REG,	/* Clock control register */
	DSIM_TIMEOUT_REG,	/* Time out register */
	DSIM_CONFIG_REG,	/* Configuration register */
	DSIM_ESCMODE_REG,	/* Escape mode register */
	DSIM_MDRESOL_REG,
	DSIM_MVPORCH_REG,	/* Main display Vporch register */
	DSIM_MHPORCH_REG,	/* Main display Hporch register */
	DSIM_MSYNC_REG,		/* Main display sync area register */
	DSIM_INTSRC_REG,	/* Interrupt source register */
	DSIM_INTMSK_REG,	/* Interrupt mask register */
	DSIM_PKTHDR_REG,	/* Packet Header FIFO register */
	DSIM_PAYLOAD_REG,	/* Payload FIFO register */
	DSIM_RXFIFO_REG,	/* Read FIFO register */
	DSIM_FIFOCTRL_REG,	/* FIFO status and control register */
	DSIM_PLLCTRL_REG,	/* PLL control register */
	DSIM_PHYCTRL_REG,
	DSIM_PHYTIMING_REG,
	DSIM_PHYTIMING1_REG,
	DSIM_PHYTIMING2_REG,
	NUM_REGS
};

static inline void exynos_dsi_write(struct exynos_dsi *dsi, enum reg_idx idx,
				    u32 val)
{

	writel(val, dsi->reg_base + dsi->driver_data->reg_ofs[idx]);
}

static inline u32 exynos_dsi_read(struct exynos_dsi *dsi, enum reg_idx idx)
{
	return readl(dsi->reg_base + dsi->driver_data->reg_ofs[idx]);
}

static const unsigned int exynos_reg_ofs[] = {
	[DSIM_STATUS_REG] =  0x00,
	[DSIM_SWRST_REG] =  0x04,
	[DSIM_CLKCTRL_REG] =  0x08,
	[DSIM_TIMEOUT_REG] =  0x0c,
	[DSIM_CONFIG_REG] =  0x10,
	[DSIM_ESCMODE_REG] =  0x14,
	[DSIM_MDRESOL_REG] =  0x18,
	[DSIM_MVPORCH_REG] =  0x1c,
	[DSIM_MHPORCH_REG] =  0x20,
	[DSIM_MSYNC_REG] =  0x24,
	[DSIM_INTSRC_REG] =  0x2c,
	[DSIM_INTMSK_REG] =  0x30,
	[DSIM_PKTHDR_REG] =  0x34,
	[DSIM_PAYLOAD_REG] =  0x38,
	[DSIM_RXFIFO_REG] =  0x3c,
	[DSIM_FIFOCTRL_REG] =  0x44,
	[DSIM_PLLCTRL_REG] =  0x4c,
	[DSIM_PHYCTRL_REG] =  0x5c,
	[DSIM_PHYTIMING_REG] =  0x64,
	[DSIM_PHYTIMING1_REG] =  0x68,
	[DSIM_PHYTIMING2_REG] =  0x6c,
};

static const unsigned int exynos5433_reg_ofs[] = {
	[DSIM_STATUS_REG] = 0x04,
	[DSIM_SWRST_REG] = 0x0C,
	[DSIM_CLKCTRL_REG] = 0x10,
	[DSIM_TIMEOUT_REG] = 0x14,
	[DSIM_CONFIG_REG] = 0x18,
	[DSIM_ESCMODE_REG] = 0x1C,
	[DSIM_MDRESOL_REG] = 0x20,
	[DSIM_MVPORCH_REG] = 0x24,
	[DSIM_MHPORCH_REG] = 0x28,
	[DSIM_MSYNC_REG] = 0x2C,
	[DSIM_INTSRC_REG] = 0x34,
	[DSIM_INTMSK_REG] = 0x38,
	[DSIM_PKTHDR_REG] = 0x3C,
	[DSIM_PAYLOAD_REG] = 0x40,
	[DSIM_RXFIFO_REG] = 0x44,
	[DSIM_FIFOCTRL_REG] = 0x4C,
	[DSIM_PLLCTRL_REG] = 0x94,
	[DSIM_PHYCTRL_REG] = 0xA4,
	[DSIM_PHYTIMING_REG] = 0xB4,
	[DSIM_PHYTIMING1_REG] = 0xB8,
	[DSIM_PHYTIMING2_REG] = 0xBC,
};

enum reg_value_idx {
	RESET_TYPE,
	PLL_TIMER,
	STOP_STATE_CNT,
	PHYCTRL_ULPS_EXIT,
	PHYCTRL_VREG_LP,
	PHYCTRL_SLEW_UP,
	PHYTIMING_LPX,
	PHYTIMING_HS_EXIT,
	PHYTIMING_CLK_PREPARE,
	PHYTIMING_CLK_ZERO,
	PHYTIMING_CLK_POST,
	PHYTIMING_CLK_TRAIL,
	PHYTIMING_HS_PREPARE,
	PHYTIMING_HS_ZERO,
	PHYTIMING_HS_TRAIL
};

static const unsigned int reg_values[] = {
	[RESET_TYPE] = DSIM_SWRST,
	[PLL_TIMER] = 500,
	[STOP_STATE_CNT] = 0xf,
	[PHYCTRL_ULPS_EXIT] = DSIM_PHYCTRL_ULPS_EXIT(0x0af),
	[PHYCTRL_VREG_LP] = 0,
	[PHYCTRL_SLEW_UP] = 0,
	[PHYTIMING_LPX] = DSIM_PHYTIMING_LPX(0x06),
	[PHYTIMING_HS_EXIT] = DSIM_PHYTIMING_HS_EXIT(0x0b),
	[PHYTIMING_CLK_PREPARE] = DSIM_PHYTIMING1_CLK_PREPARE(0x07),
	[PHYTIMING_CLK_ZERO] = DSIM_PHYTIMING1_CLK_ZERO(0x27),
	[PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0d),
	[PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x08),
	[PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x09),
	[PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x0d),
	[PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0b),
};

static const unsigned int exynos5422_reg_values[] = {
	[RESET_TYPE] = DSIM_SWRST,
	[PLL_TIMER] = 500,
	[STOP_STATE_CNT] = 0xf,
	[PHYCTRL_ULPS_EXIT] = DSIM_PHYCTRL_ULPS_EXIT(0xaf),
	[PHYCTRL_VREG_LP] = 0,
	[PHYCTRL_SLEW_UP] = 0,
	[PHYTIMING_LPX] = DSIM_PHYTIMING_LPX(0x08),
	[PHYTIMING_HS_EXIT] = DSIM_PHYTIMING_HS_EXIT(0x0d),
	[PHYTIMING_CLK_PREPARE] = DSIM_PHYTIMING1_CLK_PREPARE(0x09),
	[PHYTIMING_CLK_ZERO] = DSIM_PHYTIMING1_CLK_ZERO(0x30),
	[PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0e),
	[PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x0a),
	[PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x0c),
	[PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x11),
	[PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0d),
};

static const unsigned int exynos5433_reg_values[] = {
	[RESET_TYPE] = DSIM_FUNCRST,
	[PLL_TIMER] = 22200,
	[STOP_STATE_CNT] = 0xa,
	[PHYCTRL_ULPS_EXIT] = DSIM_PHYCTRL_ULPS_EXIT(0x190),
	[PHYCTRL_VREG_LP] = DSIM_PHYCTRL_B_DPHYCTL_VREG_LP,
	[PHYCTRL_SLEW_UP] = DSIM_PHYCTRL_B_DPHYCTL_SLEW_UP,
	[PHYTIMING_LPX] = DSIM_PHYTIMING_LPX(0x07),
	[PHYTIMING_HS_EXIT] = DSIM_PHYTIMING_HS_EXIT(0x0c),
	[PHYTIMING_CLK_PREPARE] = DSIM_PHYTIMING1_CLK_PREPARE(0x09),
	[PHYTIMING_CLK_ZERO] = DSIM_PHYTIMING1_CLK_ZERO(0x2d),
	[PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0e),
	[PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x09),
	[PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x0b),
	[PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x10),
	[PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0c),
};

static const struct exynos_dsi_driver_data exynos3_dsi_driver_data = {
	.reg_ofs = exynos_reg_ofs,
	.plltmr_reg = 0x50,
	.has_freqband = 1,
	.has_clklane_stop = 1,
	.num_clks = 2,
	.max_freq = 1000,
	.wait_for_reset = 1,
	.num_bits_resol = 11,
	.reg_values = reg_values,
};

static const struct exynos_dsi_driver_data exynos4_dsi_driver_data = {
	.reg_ofs = exynos_reg_ofs,
	.plltmr_reg = 0x50,
	.has_freqband = 1,
	.has_clklane_stop = 1,
	.num_clks = 2,
	.max_freq = 1000,
	.wait_for_reset = 1,
	.num_bits_resol = 11,
	.reg_values = reg_values,
};

static const struct exynos_dsi_driver_data exynos5_dsi_driver_data = {
	.reg_ofs = exynos_reg_ofs,
	.plltmr_reg = 0x58,
	.num_clks = 2,
	.max_freq = 1000,
	.wait_for_reset = 1,
	.num_bits_resol = 11,
	.reg_values = reg_values,
};

static const struct exynos_dsi_driver_data exynos5433_dsi_driver_data = {
	.reg_ofs = exynos5433_reg_ofs,
	.plltmr_reg = 0xa0,
	.has_clklane_stop = 1,
	.num_clks = 5,
	.max_freq = 1500,
	.wait_for_reset = 0,
	.num_bits_resol = 12,
	.reg_values = exynos5433_reg_values,
};

static const struct exynos_dsi_driver_data exynos5422_dsi_driver_data = {
	.reg_ofs = exynos5433_reg_ofs,
	.plltmr_reg = 0xa0,
	.has_clklane_stop = 1,
	.num_clks = 2,
	.max_freq = 1500,
	.wait_for_reset = 1,
	.num_bits_resol = 12,
	.reg_values = exynos5422_reg_values,
};

static const struct of_device_id exynos_dsi_of_match[] = {
	{ .compatible = "samsung,exynos3250-mipi-dsi",
	  .data = &exynos3_dsi_driver_data },
	{ .compatible = "samsung,exynos4210-mipi-dsi",
	  .data = &exynos4_dsi_driver_data },
	{ .compatible = "samsung,exynos5410-mipi-dsi",
	  .data = &exynos5_dsi_driver_data },
	{ .compatible = "samsung,exynos5422-mipi-dsi",
	  .data = &exynos5422_dsi_driver_data },
	{ .compatible = "samsung,exynos5433-mipi-dsi",
	  .data = &exynos5433_dsi_driver_data },
	{ }
};

static void exynos_dsi_wait_for_reset(struct exynos_dsi *dsi)
{
	if (wait_for_completion_timeout(&dsi->completed, msecs_to_jiffies(300)))
		return;

	dev_err(dsi->dev, "timeout waiting for reset\n");
}

static void exynos_dsi_reset(struct exynos_dsi *dsi)
{
	u32 reset_val = dsi->driver_data->reg_values[RESET_TYPE];

	reinit_completion(&dsi->completed);
	exynos_dsi_write(dsi, DSIM_SWRST_REG, reset_val);
}

#ifndef MHZ
#define MHZ	(1000*1000)
#endif

static unsigned long exynos_dsi_pll_find_pms(struct exynos_dsi *dsi,
		unsigned long fin, unsigned long fout, u8 *p, u16 *m, u8 *s)
{
	const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
	unsigned long best_freq = 0;
	u32 min_delta = 0xffffffff;
	u8 p_min, p_max;
	u8 _p, uninitialized_var(best_p);
	u16 _m, uninitialized_var(best_m);
	u8 _s, uninitialized_var(best_s);

	p_min = DIV_ROUND_UP(fin, (12 * MHZ));
	p_max = fin / (6 * MHZ);

	for (_p = p_min; _p <= p_max; ++_p) {
		for (_s = 0; _s <= 5; ++_s) {
			u64 tmp;
			u32 delta;

			tmp = (u64)fout * (_p << _s);
			do_div(tmp, fin);
			_m = tmp;
			if (_m < 41 || _m > 125)
				continue;

			tmp = (u64)_m * fin;
			do_div(tmp, _p);
			if (tmp < 500 * MHZ ||
					tmp > driver_data->max_freq * MHZ)
				continue;

			tmp = (u64)_m * fin;
			do_div(tmp, _p << _s);

			delta = abs(fout - tmp);
			if (delta < min_delta) {
				best_p = _p;
				best_m = _m;
				best_s = _s;
				min_delta = delta;
				best_freq = tmp;
			}
		}
	}

	if (best_freq) {
		*p = best_p;
		*m = best_m;
		*s = best_s;
	}

	return best_freq;
}

static unsigned long exynos_dsi_set_pll(struct exynos_dsi *dsi,
					unsigned long freq)
{
	const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
	unsigned long fin, fout;
	int timeout;
	u8 p, s;
	u16 m;
	u32 reg;

	fin = dsi->pll_clk_rate;
	fout = exynos_dsi_pll_find_pms(dsi, fin, freq, &p, &m, &s);
	if (!fout) {
		dev_err(dsi->dev,
			"failed to find PLL PMS for requested frequency\n");
		return 0;
	}
	dev_dbg(dsi->dev, "PLL freq %lu, (p %d, m %d, s %d)\n", fout, p, m, s);

	writel(driver_data->reg_values[PLL_TIMER],
			dsi->reg_base + driver_data->plltmr_reg);

	reg = DSIM_PLL_EN | DSIM_PLL_P(p) | DSIM_PLL_M(m) | DSIM_PLL_S(s);

	if (driver_data->has_freqband) {
		static const unsigned long freq_bands[] = {
			100 * MHZ, 120 * MHZ, 160 * MHZ, 200 * MHZ,
			270 * MHZ, 320 * MHZ, 390 * MHZ, 450 * MHZ,
			510 * MHZ, 560 * MHZ, 640 * MHZ, 690 * MHZ,
			770 * MHZ, 870 * MHZ, 950 * MHZ,
		};
		int band;

		for (band = 0; band < ARRAY_SIZE(freq_bands); ++band)
			if (fout < freq_bands[band])
				break;

		dev_dbg(dsi->dev, "band %d\n", band);

		reg |= DSIM_FREQ_BAND(band);
	}

	exynos_dsi_write(dsi, DSIM_PLLCTRL_REG, reg);

	timeout = 1000;
	do {
		if (timeout-- == 0) {
			dev_err(dsi->dev, "PLL failed to stabilize\n");
			return 0;
		}
		reg = exynos_dsi_read(dsi, DSIM_STATUS_REG);
	} while ((reg & DSIM_PLL_STABLE) == 0);

	return fout;
}

static int exynos_dsi_enable_clock(struct exynos_dsi *dsi)
{
	unsigned long hs_clk, byte_clk, esc_clk;
	unsigned long esc_div;
	u32 reg;

	hs_clk = exynos_dsi_set_pll(dsi, dsi->burst_clk_rate);
	if (!hs_clk) {
		dev_err(dsi->dev, "failed to configure DSI PLL\n");
		return -EFAULT;
	}

	byte_clk = hs_clk / 8;
	esc_div = DIV_ROUND_UP(byte_clk, dsi->esc_clk_rate);
	esc_clk = byte_clk / esc_div;

	if (esc_clk > 20 * MHZ) {
		++esc_div;
		esc_clk = byte_clk / esc_div;
	}

	dev_dbg(dsi->dev, "hs_clk = %lu, byte_clk = %lu, esc_clk = %lu\n",
		hs_clk, byte_clk, esc_clk);

	reg = exynos_dsi_read(dsi, DSIM_CLKCTRL_REG);
	reg &= ~(DSIM_ESC_PRESCALER_MASK | DSIM_LANE_ESC_CLK_EN_CLK
			| DSIM_LANE_ESC_CLK_EN_DATA_MASK | DSIM_PLL_BYPASS
			| DSIM_BYTE_CLK_SRC_MASK);
	reg |= DSIM_ESC_CLKEN | DSIM_BYTE_CLKEN
			| DSIM_ESC_PRESCALER(esc_div)
			| DSIM_LANE_ESC_CLK_EN_CLK
			| DSIM_LANE_ESC_CLK_EN_DATA(BIT(dsi->lanes) - 1)
			| DSIM_BYTE_CLK_SRC(0)
			| DSIM_TX_REQUEST_HSCLK;
	exynos_dsi_write(dsi, DSIM_CLKCTRL_REG, reg);

	return 0;
}

static void exynos_dsi_set_phy_ctrl(struct exynos_dsi *dsi)
{
	const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
	const unsigned int *reg_values = driver_data->reg_values;
	u32 reg;

	if (driver_data->has_freqband)
		return;

	/* B D-PHY: D-PHY Master & Slave Analog Block control */
	reg = reg_values[PHYCTRL_ULPS_EXIT] | reg_values[PHYCTRL_VREG_LP] |
		reg_values[PHYCTRL_SLEW_UP];
	exynos_dsi_write(dsi, DSIM_PHYCTRL_REG, reg);

	/*
	 * T LPX: Transmitted length of any Low-Power state period
	 * T HS-EXIT: Time that the transmitter drives LP-11 following a HS
	 *	burst
	 */
	reg = reg_values[PHYTIMING_LPX] | reg_values[PHYTIMING_HS_EXIT];
	exynos_dsi_write(dsi, DSIM_PHYTIMING_REG, reg);

	/*
	 * T CLK-PREPARE: Time that the transmitter drives the Clock Lane LP-00
	 *	Line state immediately before the HS-0 Line state starting the
	 *	HS transmission
	 * T CLK-ZERO: Time that the transmitter drives the HS-0 state prior to
	 *	transmitting the Clock.
	 * T CLK_POST: Time that the transmitter continues to send HS clock
	 *	after the last associated Data Lane has transitioned to LP Mode
	 *	Interval is defined as the period from the end of T HS-TRAIL to
	 *	the beginning of T CLK-TRAIL
	 * T CLK-TRAIL: Time that the transmitter drives the HS-0 state after
	 *	the last payload clock bit of a HS transmission burst
	 */
	reg = reg_values[PHYTIMING_CLK_PREPARE] |
		reg_values[PHYTIMING_CLK_ZERO] |
		reg_values[PHYTIMING_CLK_POST] |
		reg_values[PHYTIMING_CLK_TRAIL];

	exynos_dsi_write(dsi, DSIM_PHYTIMING1_REG, reg);

	/*
	 * T HS-PREPARE: Time that the transmitter drives the Data Lane LP-00
	 *	Line state immediately before the HS-0 Line state starting the
	 *	HS transmission
	 * T HS-ZERO: Time that the transmitter drives the HS-0 state prior to
	 *	transmitting the Sync sequence.
	 * T HS-TRAIL: Time that the transmitter drives the flipped differential
	 *	state after last payload data bit of a HS transmission burst
	 */
	reg = reg_values[PHYTIMING_HS_PREPARE] | reg_values[PHYTIMING_HS_ZERO] |
		reg_values[PHYTIMING_HS_TRAIL];
	exynos_dsi_write(dsi, DSIM_PHYTIMING2_REG, reg);
}

static void exynos_dsi_disable_clock(struct exynos_dsi *dsi)
{
	u32 reg;

	reg = exynos_dsi_read(dsi, DSIM_CLKCTRL_REG);
	reg &= ~(DSIM_LANE_ESC_CLK_EN_CLK | DSIM_LANE_ESC_CLK_EN_DATA_MASK
			| DSIM_ESC_CLKEN | DSIM_BYTE_CLKEN);
	exynos_dsi_write(dsi, DSIM_CLKCTRL_REG, reg);

	reg = exynos_dsi_read(dsi, DSIM_PLLCTRL_REG);
	reg &= ~DSIM_PLL_EN;
	exynos_dsi_write(dsi, DSIM_PLLCTRL_REG, reg);
}

static void exynos_dsi_enable_lane(struct exynos_dsi *dsi, u32 lane)
{
	u32 reg = exynos_dsi_read(dsi, DSIM_CONFIG_REG);
	reg |= (DSIM_NUM_OF_DATA_LANE(dsi->lanes - 1) | DSIM_LANE_EN_CLK |
			DSIM_LANE_EN(lane));
	exynos_dsi_write(dsi, DSIM_CONFIG_REG, reg);
}

static int exynos_dsi_init_link(struct exynos_dsi *dsi)
{
	const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
	int timeout;
	u32 reg;
	u32 lanes_mask;

	/* Initialize FIFO pointers */
	reg = exynos_dsi_read(dsi, DSIM_FIFOCTRL_REG);
	reg &= ~0x1f;
	exynos_dsi_write(dsi, DSIM_FIFOCTRL_REG, reg);

	usleep_range(9000, 11000);

	reg |= 0x1f;
	exynos_dsi_write(dsi, DSIM_FIFOCTRL_REG, reg);
	usleep_range(9000, 11000);

	/* DSI configuration */
	reg = 0;

	/*
	 * The first bit of mode_flags specifies display configuration.
	 * If this bit is set[= MIPI_DSI_MODE_VIDEO], dsi will support video
	 * mode, otherwise it will support command mode.
	 */
	if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
		reg |= DSIM_VIDEO_MODE;

		/*
		 * The user manual describes that following bits are ignored in
		 * command mode.
		 */
		if (!(dsi->mode_flags & MIPI_DSI_MODE_VSYNC_FLUSH))
			reg |= DSIM_MFLUSH_VS;
		if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
			reg |= DSIM_SYNC_INFORM;
		if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
			reg |= DSIM_BURST_MODE;
		if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_AUTO_VERT)
			reg |= DSIM_AUTO_MODE;
		if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_HSE)
			reg |= DSIM_HSE_MODE;
		if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_HFP))
			reg |= DSIM_HFP_MODE;
		if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_HBP))
			reg |= DSIM_HBP_MODE;
		if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_HSA))
			reg |= DSIM_HSA_MODE;
	}

	if (!(dsi->mode_flags & MIPI_DSI_MODE_EOT_PACKET))
		reg |= DSIM_EOT_DISABLE;

	switch (dsi->format) {
	case MIPI_DSI_FMT_RGB888:
		reg |= DSIM_MAIN_PIX_FORMAT_RGB888;
		break;
	case MIPI_DSI_FMT_RGB666:
		reg |= DSIM_MAIN_PIX_FORMAT_RGB666;
		break;
	case MIPI_DSI_FMT_RGB666_PACKED:
		reg |= DSIM_MAIN_PIX_FORMAT_RGB666_P;
		break;
	case MIPI_DSI_FMT_RGB565:
		reg |= DSIM_MAIN_PIX_FORMAT_RGB565;
		break;
	default:
		dev_err(dsi->dev, "invalid pixel format\n");
		return -EINVAL;
	}

	/*
	 * Use non-continuous clock mode if the periparal wants and
	 * host controller supports
	 *
	 * In non-continous clock mode, host controller will turn off
	 * the HS clock between high-speed transmissions to reduce
	 * power consumption.
	 */
	if (driver_data->has_clklane_stop &&
			dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) {
		reg |= DSIM_CLKLANE_STOP;
	}
	exynos_dsi_write(dsi, DSIM_CONFIG_REG, reg);

	lanes_mask = BIT(dsi->lanes) - 1;
	exynos_dsi_enable_lane(dsi, lanes_mask);

	/* Check clock and data lane state are stop state */
	timeout = 100;
	do {
		if (timeout-- == 0) {
			dev_err(dsi->dev, "waiting for bus lanes timed out\n");
			return -EFAULT;
		}

		reg = exynos_dsi_read(dsi, DSIM_STATUS_REG);
		if ((reg & DSIM_STOP_STATE_DAT(lanes_mask))
		    != DSIM_STOP_STATE_DAT(lanes_mask))
			continue;
	} while (!(reg & (DSIM_STOP_STATE_CLK | DSIM_TX_READY_HS_CLK)));

	reg = exynos_dsi_read(dsi, DSIM_ESCMODE_REG);
	reg &= ~DSIM_STOP_STATE_CNT_MASK;
	reg |= DSIM_STOP_STATE_CNT(driver_data->reg_values[STOP_STATE_CNT]);
	exynos_dsi_write(dsi, DSIM_ESCMODE_REG, reg);

	reg = DSIM_BTA_TIMEOUT(0xff) | DSIM_LPDR_TIMEOUT(0xffff);
	exynos_dsi_write(dsi, DSIM_TIMEOUT_REG, reg);

	return 0;
}

static void exynos_dsi_set_display_mode(struct exynos_dsi *dsi)
{
	struct drm_display_mode *m = &dsi->encoder.crtc->state->adjusted_mode;
	unsigned int num_bits_resol = dsi->driver_data->num_bits_resol;
	u32 reg;

	if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
		reg = DSIM_CMD_ALLOW(0xf)
			| DSIM_STABLE_VFP(m->vsync_start - m->vdisplay)
			| DSIM_MAIN_VBP(m->vtotal - m->vsync_end);
		exynos_dsi_write(dsi, DSIM_MVPORCH_REG, reg);

		reg = DSIM_MAIN_HFP(m->hsync_start - m->hdisplay)
			| DSIM_MAIN_HBP(m->htotal - m->hsync_end);
		exynos_dsi_write(dsi, DSIM_MHPORCH_REG, reg);

		reg = DSIM_MAIN_VSA(m->vsync_end - m->vsync_start)
			| DSIM_MAIN_HSA(m->hsync_end - m->hsync_start);
		exynos_dsi_write(dsi, DSIM_MSYNC_REG, reg);
	}
	reg =  DSIM_MAIN_HRESOL(m->hdisplay, num_bits_resol) |
		DSIM_MAIN_VRESOL(m->vdisplay, num_bits_resol);

	exynos_dsi_write(dsi, DSIM_MDRESOL_REG, reg);

	dev_dbg(dsi->dev, "LCD size = %dx%d\n", m->hdisplay, m->vdisplay);
}

static void exynos_dsi_set_display_enable(struct exynos_dsi *dsi, bool enable)
{
	u32 reg;

	reg = exynos_dsi_read(dsi, DSIM_MDRESOL_REG);
	if (enable)
		reg |= DSIM_MAIN_STAND_BY;
	else
		reg &= ~DSIM_MAIN_STAND_BY;
	exynos_dsi_write(dsi, DSIM_MDRESOL_REG, reg);
}

static int exynos_dsi_wait_for_hdr_fifo(struct exynos_dsi *dsi)
{
	int timeout = 2000;

	do {
		u32 reg = exynos_dsi_read(dsi, DSIM_FIFOCTRL_REG);

		if (!(reg & DSIM_SFR_HEADER_FULL))
			return 0;

		if (!cond_resched())
			usleep_range(950, 1050);
	} while (--timeout);

	return -ETIMEDOUT;
}

static void exynos_dsi_set_cmd_lpm(struct exynos_dsi *dsi, bool lpm)
{
	u32 v = exynos_dsi_read(dsi, DSIM_ESCMODE_REG);

	if (lpm)
		v |= DSIM_CMD_LPDT_LP;
	else
		v &= ~DSIM_CMD_LPDT_LP;

	exynos_dsi_write(dsi, DSIM_ESCMODE_REG, v);
}

static void exynos_dsi_force_bta(struct exynos_dsi *dsi)
{
	u32 v = exynos_dsi_read(dsi, DSIM_ESCMODE_REG);
	v |= DSIM_FORCE_BTA;
	exynos_dsi_write(dsi, DSIM_ESCMODE_REG, v);
}

static void exynos_dsi_send_to_fifo(struct exynos_dsi *dsi,
					struct exynos_dsi_transfer *xfer)
{
	struct device *dev = dsi->dev;
	struct mipi_dsi_packet *pkt = &xfer->packet;
	const u8 *payload = pkt->payload + xfer->tx_done;
	u16 length = pkt->payload_length - xfer->tx_done;
	bool first = !xfer->tx_done;
	u32 reg;

	dev_dbg(dev, "< xfer %pK: tx len %u, done %u, rx len %u, done %u\n",
		xfer, length, xfer->tx_done, xfer->rx_len, xfer->rx_done);

	if (length > DSI_TX_FIFO_SIZE)
		length = DSI_TX_FIFO_SIZE;

	xfer->tx_done += length;

	/* Send payload */
	while (length >= 4) {
		reg = get_unaligned_le32(payload);
		exynos_dsi_write(dsi, DSIM_PAYLOAD_REG, reg);
		payload += 4;
		length -= 4;
	}

	reg = 0;
	switch (length) {
	case 3:
		reg |= payload[2] << 16;
		/* Fall through */
	case 2:
		reg |= payload[1] << 8;
		/* Fall through */
	case 1:
		reg |= payload[0];
		exynos_dsi_write(dsi, DSIM_PAYLOAD_REG, reg);
		break;
	}

	/* Send packet header */
	if (!first)
		return;

	reg = get_unaligned_le32(pkt->header);
	if (exynos_dsi_wait_for_hdr_fifo(dsi)) {
		dev_err(dev, "waiting for header FIFO timed out\n");
		return;
	}

	if (NEQV(xfer->flags & MIPI_DSI_MSG_USE_LPM,
		 dsi->state & DSIM_STATE_CMD_LPM)) {
		exynos_dsi_set_cmd_lpm(dsi, xfer->flags & MIPI_DSI_MSG_USE_LPM);
		dsi->state ^= DSIM_STATE_CMD_LPM;
	}

	exynos_dsi_write(dsi, DSIM_PKTHDR_REG, reg);

	if (xfer->flags & MIPI_DSI_MSG_REQ_ACK)
		exynos_dsi_force_bta(dsi);
}

static void exynos_dsi_read_from_fifo(struct exynos_dsi *dsi,
					struct exynos_dsi_transfer *xfer)
{
	u8 *payload = xfer->rx_payload + xfer->rx_done;
	bool first = !xfer->rx_done;
	struct device *dev = dsi->dev;
	u16 length;
	u32 reg;

	if (first) {
		reg = exynos_dsi_read(dsi, DSIM_RXFIFO_REG);

		switch (reg & 0x3f) {
		case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
		case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
			if (xfer->rx_len >= 2) {
				payload[1] = reg >> 16;
				++xfer->rx_done;
			}
			/* Fall through */
		case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
		case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
			payload[0] = reg >> 8;
			++xfer->rx_done;
			xfer->rx_len = xfer->rx_done;
			xfer->result = 0;
			goto clear_fifo;
		case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
			dev_err(dev, "DSI Error Report: 0x%04x\n",
				(reg >> 8) & 0xffff);
			xfer->result = 0;
			goto clear_fifo;
		}

		length = (reg >> 8) & 0xffff;
		if (length > xfer->rx_len) {
			dev_err(dev,
				"response too long (%u > %u bytes), stripping\n",
				xfer->rx_len, length);
			length = xfer->rx_len;
		} else if (length < xfer->rx_len)
			xfer->rx_len = length;
	}

	length = xfer->rx_len - xfer->rx_done;
	xfer->rx_done += length;

	/* Receive payload */
	while (length >= 4) {
		reg = exynos_dsi_read(dsi, DSIM_RXFIFO_REG);
		payload[0] = (reg >>  0) & 0xff;
		payload[1] = (reg >>  8) & 0xff;
		payload[2] = (reg >> 16) & 0xff;
		payload[3] = (reg >> 24) & 0xff;
		payload += 4;
		length -= 4;
	}

	if (length) {
		reg = exynos_dsi_read(dsi, DSIM_RXFIFO_REG);
		switch (length) {
		case 3:
			payload[2] = (reg >> 16) & 0xff;
			/* Fall through */
		case 2:
			payload[1] = (reg >> 8) & 0xff;
			/* Fall through */
		case 1:
			payload[0] = reg & 0xff;
		}
	}

	if (xfer->rx_done == xfer->rx_len)
		xfer->result = 0;

clear_fifo:
	length = DSI_RX_FIFO_SIZE / 4;
	do {
		reg = exynos_dsi_read(dsi, DSIM_RXFIFO_REG);
		if (reg == DSI_RX_FIFO_EMPTY)
			break;
	} while (--length);
}

static void exynos_dsi_transfer_start(struct exynos_dsi *dsi)
{
	unsigned long flags;
	struct exynos_dsi_transfer *xfer;
	bool start = false;

again:
	spin_lock_irqsave(&dsi->transfer_lock, flags);

	if (list_empty(&dsi->transfer_list)) {
		spin_unlock_irqrestore(&dsi->transfer_lock, flags);
		return;
	}

	xfer = list_first_entry(&dsi->transfer_list,
					struct exynos_dsi_transfer, list);

	spin_unlock_irqrestore(&dsi->transfer_lock, flags);

	if (xfer->packet.payload_length &&
	    xfer->tx_done == xfer->packet.payload_length)
		/* waiting for RX */
		return;

	exynos_dsi_send_to_fifo(dsi, xfer);

	if (xfer->packet.payload_length || xfer->rx_len)
		return;

	xfer->result = 0;
	complete(&xfer->completed);

	spin_lock_irqsave(&dsi->transfer_lock, flags);

	list_del_init(&xfer->list);
	start = !list_empty(&dsi->transfer_list);

	spin_unlock_irqrestore(&dsi->transfer_lock, flags);

	if (start)
		goto again;
}

static bool exynos_dsi_transfer_finish(struct exynos_dsi *dsi)
{
	struct exynos_dsi_transfer *xfer;
	unsigned long flags;
	bool start = true;

	spin_lock_irqsave(&dsi->transfer_lock, flags);

	if (list_empty(&dsi->transfer_list)) {
		spin_unlock_irqrestore(&dsi->transfer_lock, flags);
		return false;
	}

	xfer = list_first_entry(&dsi->transfer_list,
					struct exynos_dsi_transfer, list);

	spin_unlock_irqrestore(&dsi->transfer_lock, flags);

	dev_dbg(dsi->dev,
		"> xfer %pK, tx_len %zu, tx_done %u, rx_len %u, rx_done %u\n",
		xfer, xfer->packet.payload_length, xfer->tx_done, xfer->rx_len,
		xfer->rx_done);

	if (xfer->tx_done != xfer->packet.payload_length)
		return true;

	if (xfer->rx_done != xfer->rx_len)
		exynos_dsi_read_from_fifo(dsi, xfer);

	if (xfer->rx_done != xfer->rx_len)
		return true;

	spin_lock_irqsave(&dsi->transfer_lock, flags);

	list_del_init(&xfer->list);
	start = !list_empty(&dsi->transfer_list);

	spin_unlock_irqrestore(&dsi->transfer_lock, flags);

	if (!xfer->rx_len)
		xfer->result = 0;
	complete(&xfer->completed);

	return start;
}

static void exynos_dsi_remove_transfer(struct exynos_dsi *dsi,
					struct exynos_dsi_transfer *xfer)
{
	unsigned long flags;
	bool start;

	spin_lock_irqsave(&dsi->transfer_lock, flags);

	if (!list_empty(&dsi->transfer_list) &&
	    xfer == list_first_entry(&dsi->transfer_list,
				     struct exynos_dsi_transfer, list)) {
		list_del_init(&xfer->list);
		start = !list_empty(&dsi->transfer_list);
		spin_unlock_irqrestore(&dsi->transfer_lock, flags);
		if (start)
			exynos_dsi_transfer_start(dsi);
		return;
	}

	list_del_init(&xfer->list);

	spin_unlock_irqrestore(&dsi->transfer_lock, flags);
}

static int exynos_dsi_transfer(struct exynos_dsi *dsi,
					struct exynos_dsi_transfer *xfer)
{
	unsigned long flags;
	bool stopped;

	xfer->tx_done = 0;
	xfer->rx_done = 0;
	xfer->result = -ETIMEDOUT;
	init_completion(&xfer->completed);

	spin_lock_irqsave(&dsi->transfer_lock, flags);

	stopped = list_empty(&dsi->transfer_list);
	list_add_tail(&xfer->list, &dsi->transfer_list);

	spin_unlock_irqrestore(&dsi->transfer_lock, flags);

	if (stopped)
		exynos_dsi_transfer_start(dsi);

	wait_for_completion_timeout(&xfer->completed,
				    msecs_to_jiffies(DSI_XFER_TIMEOUT_MS));
	if (xfer->result == -ETIMEDOUT) {
		struct mipi_dsi_packet *pkt = &xfer->packet;
		exynos_dsi_remove_transfer(dsi, xfer);
		dev_err(dsi->dev, "xfer timed out: %*ph %*ph\n", 4, pkt->header,
			(int)pkt->payload_length, pkt->payload);
		return -ETIMEDOUT;
	}

	/* Also covers hardware timeout condition */
	return xfer->result;
}

static irqreturn_t exynos_dsi_irq(int irq, void *dev_id)
{
	struct exynos_dsi *dsi = dev_id;
	u32 status;

	status = exynos_dsi_read(dsi, DSIM_INTSRC_REG);
	if (!status) {
		static unsigned long int j;
		if (printk_timed_ratelimit(&j, 500))
			dev_warn(dsi->dev, "spurious interrupt\n");
		return IRQ_HANDLED;
	}
	exynos_dsi_write(dsi, DSIM_INTSRC_REG, status);

	if (status & DSIM_INT_SW_RST_RELEASE) {
		u32 mask = ~(DSIM_INT_RX_DONE | DSIM_INT_SFR_FIFO_EMPTY |
			DSIM_INT_SFR_HDR_FIFO_EMPTY | DSIM_INT_RX_ECC_ERR |
			DSIM_INT_SW_RST_RELEASE);
		exynos_dsi_write(dsi, DSIM_INTMSK_REG, mask);
		complete(&dsi->completed);
		return IRQ_HANDLED;
	}

	if (!(status & (DSIM_INT_RX_DONE | DSIM_INT_SFR_FIFO_EMPTY |
			DSIM_INT_PLL_STABLE)))
		return IRQ_HANDLED;

	if (exynos_dsi_transfer_finish(dsi))
		exynos_dsi_transfer_start(dsi);

	return IRQ_HANDLED;
}

static irqreturn_t exynos_dsi_te_irq_handler(int irq, void *dev_id)
{
	struct exynos_dsi *dsi = (struct exynos_dsi *)dev_id;
	struct drm_encoder *encoder = &dsi->encoder;

	if (dsi->state & DSIM_STATE_VIDOUT_AVAILABLE)
		exynos_drm_crtc_te_handler(encoder->crtc);

	return IRQ_HANDLED;
}

static void exynos_dsi_enable_irq(struct exynos_dsi *dsi)
{
	enable_irq(dsi->irq);

	if (gpio_is_valid(dsi->te_gpio))
		enable_irq(gpio_to_irq(dsi->te_gpio));
}

static void exynos_dsi_disable_irq(struct exynos_dsi *dsi)
{
	if (gpio_is_valid(dsi->te_gpio))
		disable_irq(gpio_to_irq(dsi->te_gpio));

	disable_irq(dsi->irq);
}

static int exynos_dsi_init(struct exynos_dsi *dsi)
{
	const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;

	exynos_dsi_reset(dsi);
	exynos_dsi_enable_irq(dsi);

	if (driver_data->reg_values[RESET_TYPE] == DSIM_FUNCRST)
		exynos_dsi_enable_lane(dsi, BIT(dsi->lanes) - 1);

	exynos_dsi_enable_clock(dsi);
	if (driver_data->wait_for_reset)
		exynos_dsi_wait_for_reset(dsi);
	exynos_dsi_set_phy_ctrl(dsi);
	exynos_dsi_init_link(dsi);

	return 0;
}

static int exynos_dsi_register_te_irq(struct exynos_dsi *dsi,
				      struct device *panel)
{
	int ret;
	int te_gpio_irq;

	dsi->te_gpio = of_get_named_gpio(panel->of_node, "te-gpios", 0);
	if (dsi->te_gpio == -ENOENT)
		return 0;

	if (!gpio_is_valid(dsi->te_gpio)) {
		ret = dsi->te_gpio;
		dev_err(dsi->dev, "cannot get te-gpios, %d\n", ret);
		goto out;
	}

	ret = gpio_request(dsi->te_gpio, "te_gpio");
	if (ret) {
		dev_err(dsi->dev, "gpio request failed with %d\n", ret);
		goto out;
	}

	te_gpio_irq = gpio_to_irq(dsi->te_gpio);
	irq_set_status_flags(te_gpio_irq, IRQ_NOAUTOEN);

	ret = request_threaded_irq(te_gpio_irq, exynos_dsi_te_irq_handler, NULL,
					IRQF_TRIGGER_RISING, "TE", dsi);
	if (ret) {
		dev_err(dsi->dev, "request interrupt failed with %d\n", ret);
		gpio_free(dsi->te_gpio);
		goto out;
	}

out:
	return ret;
}

static void exynos_dsi_unregister_te_irq(struct exynos_dsi *dsi)
{
	if (gpio_is_valid(dsi->te_gpio)) {
		free_irq(gpio_to_irq(dsi->te_gpio), dsi);
		gpio_free(dsi->te_gpio);
		dsi->te_gpio = -ENOENT;
	}
}

static void exynos_dsi_enable(struct drm_encoder *encoder)
{
	struct exynos_dsi *dsi = encoder_to_dsi(encoder);
	int ret;

	if (dsi->state & DSIM_STATE_ENABLED)
		return;

	pm_runtime_get_sync(dsi->dev);
	dsi->state |= DSIM_STATE_ENABLED;

	if (dsi->panel) {
		ret = drm_panel_prepare(dsi->panel);
		if (ret < 0)
			goto err_put_sync;
	} else {
		drm_bridge_chain_pre_enable(dsi->out_bridge);
	}

	exynos_dsi_set_display_mode(dsi);
	exynos_dsi_set_display_enable(dsi, true);

	if (dsi->panel) {
		ret = drm_panel_enable(dsi->panel);
		if (ret < 0)
			goto err_display_disable;
	} else {
		drm_bridge_chain_enable(dsi->out_bridge);
	}

	dsi->state |= DSIM_STATE_VIDOUT_AVAILABLE;
	return;

err_display_disable:
	exynos_dsi_set_display_enable(dsi, false);
	drm_panel_unprepare(dsi->panel);

err_put_sync:
	dsi->state &= ~DSIM_STATE_ENABLED;
	pm_runtime_put(dsi->dev);
}

static void exynos_dsi_disable(struct drm_encoder *encoder)
{
	struct exynos_dsi *dsi = encoder_to_dsi(encoder);

	if (!(dsi->state & DSIM_STATE_ENABLED))
		return;

	dsi->state &= ~DSIM_STATE_VIDOUT_AVAILABLE;

	drm_panel_disable(dsi->panel);
	drm_bridge_chain_disable(dsi->out_bridge);
	exynos_dsi_set_display_enable(dsi, false);
	drm_panel_unprepare(dsi->panel);
	drm_bridge_chain_post_disable(dsi->out_bridge);
	dsi->state &= ~DSIM_STATE_ENABLED;
	pm_runtime_put_sync(dsi->dev);
}

static enum drm_connector_status
exynos_dsi_detect(struct drm_connector *connector, bool force)
{
	return connector->status;
}

static void exynos_dsi_connector_destroy(struct drm_connector *connector)
{
	drm_connector_unregister(connector);
	drm_connector_cleanup(connector);
	connector->dev = NULL;
}

static const struct drm_connector_funcs exynos_dsi_connector_funcs = {
	.detect = exynos_dsi_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.destroy = exynos_dsi_connector_destroy,
	.reset = drm_atomic_helper_connector_reset,
	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};

static int exynos_dsi_get_modes(struct drm_connector *connector)
{
	struct exynos_dsi *dsi = connector_to_dsi(connector);

	if (dsi->panel)
		return drm_panel_get_modes(dsi->panel, connector);

	return 0;
}

static const struct drm_connector_helper_funcs exynos_dsi_connector_helper_funcs = {
	.get_modes = exynos_dsi_get_modes,
};

static int exynos_dsi_create_connector(struct drm_encoder *encoder)
{
	struct exynos_dsi *dsi = encoder_to_dsi(encoder);
	struct drm_connector *connector = &dsi->connector;
	struct drm_device *drm = encoder->dev;
	int ret;

	connector->polled = DRM_CONNECTOR_POLL_HPD;

	ret = drm_connector_init(drm, connector, &exynos_dsi_connector_funcs,
				 DRM_MODE_CONNECTOR_DSI);
	if (ret) {
		DRM_DEV_ERROR(dsi->dev,
			      "Failed to initialize connector with drm\n");
		return ret;
	}

	connector->status = connector_status_disconnected;
	drm_connector_helper_add(connector, &exynos_dsi_connector_helper_funcs);
	drm_connector_attach_encoder(connector, encoder);
	if (!drm->registered)
		return 0;

	connector->funcs->reset(connector);
	drm_fb_helper_add_one_connector(drm->fb_helper, connector);
	drm_connector_register(connector);
	return 0;
}

static const struct drm_encoder_helper_funcs exynos_dsi_encoder_helper_funcs = {
	.enable = exynos_dsi_enable,
	.disable = exynos_dsi_disable,
};

static const struct drm_encoder_funcs exynos_dsi_encoder_funcs = {
	.destroy = drm_encoder_cleanup,
};

MODULE_DEVICE_TABLE(of, exynos_dsi_of_match);

static int exynos_dsi_host_attach(struct mipi_dsi_host *host,
				  struct mipi_dsi_device *device)
{
	struct exynos_dsi *dsi = host_to_dsi(host);
	struct drm_encoder *encoder = &dsi->encoder;
	struct drm_device *drm = encoder->dev;
	struct drm_bridge *out_bridge;

	out_bridge  = of_drm_find_bridge(device->dev.of_node);
	if (out_bridge) {
		drm_bridge_attach(encoder, out_bridge, NULL);
		dsi->out_bridge = out_bridge;
		list_splice(&encoder->bridge_chain, &dsi->bridge_chain);
	} else {
		int ret = exynos_dsi_create_connector(encoder);

		if (ret) {
			DRM_DEV_ERROR(dsi->dev,
				      "failed to create connector ret = %d\n",
				      ret);
			drm_encoder_cleanup(encoder);
			return ret;
		}

		dsi->panel = of_drm_find_panel(device->dev.of_node);
		if (IS_ERR(dsi->panel)) {
			dsi->panel = NULL;
		} else {
			drm_panel_attach(dsi->panel, &dsi->connector);
			dsi->connector.status = connector_status_connected;
		}
	}

	/*
	 * This is a temporary solution and should be made by more generic way.
	 *
	 * If attached panel device is for command mode one, dsi should register
	 * TE interrupt handler.
	 */
	if (!(device->mode_flags & MIPI_DSI_MODE_VIDEO)) {
		int ret = exynos_dsi_register_te_irq(dsi, &device->dev);
		if (ret)
			return ret;
	}

	mutex_lock(&drm->mode_config.mutex);

	dsi->lanes = device->lanes;
	dsi->format = device->format;
	dsi->mode_flags = device->mode_flags;
	exynos_drm_crtc_get_by_type(drm, EXYNOS_DISPLAY_TYPE_LCD)->i80_mode =
			!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO);

	mutex_unlock(&drm->mode_config.mutex);

	if (drm->mode_config.poll_enabled)
		drm_kms_helper_hotplug_event(drm);

	return 0;
}

static int exynos_dsi_host_detach(struct mipi_dsi_host *host,
				  struct mipi_dsi_device *device)
{
	struct exynos_dsi *dsi = host_to_dsi(host);
	struct drm_device *drm = dsi->encoder.dev;

	if (dsi->panel) {
		mutex_lock(&drm->mode_config.mutex);
		exynos_dsi_disable(&dsi->encoder);
		drm_panel_detach(dsi->panel);
		dsi->panel = NULL;
		dsi->connector.status = connector_status_disconnected;
		mutex_unlock(&drm->mode_config.mutex);
	} else {
		if (dsi->out_bridge->funcs->detach)
			dsi->out_bridge->funcs->detach(dsi->out_bridge);
		dsi->out_bridge = NULL;
		INIT_LIST_HEAD(&dsi->bridge_chain);
	}

	if (drm->mode_config.poll_enabled)
		drm_kms_helper_hotplug_event(drm);

	exynos_dsi_unregister_te_irq(dsi);

	return 0;
}

static ssize_t exynos_dsi_host_transfer(struct mipi_dsi_host *host,
					 const struct mipi_dsi_msg *msg)
{
	struct exynos_dsi *dsi = host_to_dsi(host);
	struct exynos_dsi_transfer xfer;
	int ret;

	if (!(dsi->state & DSIM_STATE_ENABLED))
		return -EINVAL;

	if (!(dsi->state & DSIM_STATE_INITIALIZED)) {
		ret = exynos_dsi_init(dsi);
		if (ret)
			return ret;
		dsi->state |= DSIM_STATE_INITIALIZED;
	}

	ret = mipi_dsi_create_packet(&xfer.packet, msg);
	if (ret < 0)
		return ret;

	xfer.rx_len = msg->rx_len;
	xfer.rx_payload = msg->rx_buf;
	xfer.flags = msg->flags;

	ret = exynos_dsi_transfer(dsi, &xfer);
	return (ret < 0) ? ret : xfer.rx_done;
}

static const struct mipi_dsi_host_ops exynos_dsi_ops = {
	.attach = exynos_dsi_host_attach,
	.detach = exynos_dsi_host_detach,
	.transfer = exynos_dsi_host_transfer,
};

static int exynos_dsi_of_read_u32(const struct device_node *np,
				  const char *propname, u32 *out_value)
{
	int ret = of_property_read_u32(np, propname, out_value);

	if (ret < 0)
		pr_err("%pOF: failed to get '%s' property\n", np, propname);

	return ret;
}

enum {
	DSI_PORT_IN,
	DSI_PORT_OUT
};

static int exynos_dsi_parse_dt(struct exynos_dsi *dsi)
{
	struct device *dev = dsi->dev;
	struct device_node *node = dev->of_node;
	int ret;

	ret = exynos_dsi_of_read_u32(node, "samsung,pll-clock-frequency",
				     &dsi->pll_clk_rate);
	if (ret < 0)
		return ret;

	ret = exynos_dsi_of_read_u32(node, "samsung,burst-clock-frequency",
				     &dsi->burst_clk_rate);
	if (ret < 0)
		return ret;

	ret = exynos_dsi_of_read_u32(node, "samsung,esc-clock-frequency",
				     &dsi->esc_clk_rate);
	if (ret < 0)
		return ret;

	dsi->in_bridge_node = of_graph_get_remote_node(node, DSI_PORT_IN, 0);

	return 0;
}

static int exynos_dsi_bind(struct device *dev, struct device *master,
				void *data)
{
	struct drm_encoder *encoder = dev_get_drvdata(dev);
	struct exynos_dsi *dsi = encoder_to_dsi(encoder);
	struct drm_device *drm_dev = data;
	struct drm_bridge *in_bridge;
	int ret;

	drm_encoder_init(drm_dev, encoder, &exynos_dsi_encoder_funcs,
			 DRM_MODE_ENCODER_TMDS, NULL);

	drm_encoder_helper_add(encoder, &exynos_dsi_encoder_helper_funcs);

	ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD);
	if (ret < 0)
		return ret;

	if (dsi->in_bridge_node) {
		in_bridge = of_drm_find_bridge(dsi->in_bridge_node);
		if (in_bridge)
			drm_bridge_attach(encoder, in_bridge, NULL);
	}

	return mipi_dsi_host_register(&dsi->dsi_host);
}

static void exynos_dsi_unbind(struct device *dev, struct device *master,
				void *data)
{
	struct drm_encoder *encoder = dev_get_drvdata(dev);
	struct exynos_dsi *dsi = encoder_to_dsi(encoder);

	exynos_dsi_disable(encoder);

	mipi_dsi_host_unregister(&dsi->dsi_host);
}

static const struct component_ops exynos_dsi_component_ops = {
	.bind	= exynos_dsi_bind,
	.unbind	= exynos_dsi_unbind,
};

static int exynos_dsi_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct resource *res;
	struct exynos_dsi *dsi;
	int ret, i;

	dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
	if (!dsi)
		return -ENOMEM;

	/* To be checked as invalid one */
	dsi->te_gpio = -ENOENT;

	init_completion(&dsi->completed);
	spin_lock_init(&dsi->transfer_lock);
	INIT_LIST_HEAD(&dsi->transfer_list);
	INIT_LIST_HEAD(&dsi->bridge_chain);

	dsi->dsi_host.ops = &exynos_dsi_ops;
	dsi->dsi_host.dev = dev;

	dsi->dev = dev;
	dsi->driver_data = of_device_get_match_data(dev);

	ret = exynos_dsi_parse_dt(dsi);
	if (ret)
		return ret;

	dsi->supplies[0].supply = "vddcore";
	dsi->supplies[1].supply = "vddio";
	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(dsi->supplies),
				      dsi->supplies);
	if (ret) {
		dev_info(dev, "failed to get regulators: %d\n", ret);
		return -EPROBE_DEFER;
	}

	dsi->clks = devm_kcalloc(dev,
			dsi->driver_data->num_clks, sizeof(*dsi->clks),
			GFP_KERNEL);
	if (!dsi->clks)
		return -ENOMEM;

	for (i = 0; i < dsi->driver_data->num_clks; i++) {
		dsi->clks[i] = devm_clk_get(dev, clk_names[i]);
		if (IS_ERR(dsi->clks[i])) {
			if (strcmp(clk_names[i], "sclk_mipi") == 0) {
				strcpy(clk_names[i], OLD_SCLK_MIPI_CLK_NAME);
				i--;
				continue;
			}

			dev_info(dev, "failed to get the clock: %s\n",
					clk_names[i]);
			return PTR_ERR(dsi->clks[i]);
		}
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	dsi->reg_base = devm_ioremap_resource(dev, res);
	if (IS_ERR(dsi->reg_base)) {
		dev_err(dev, "failed to remap io region\n");
		return PTR_ERR(dsi->reg_base);
	}

	dsi->phy = devm_phy_get(dev, "dsim");
	if (IS_ERR(dsi->phy)) {
		dev_info(dev, "failed to get dsim phy\n");
		return PTR_ERR(dsi->phy);
	}

	dsi->irq = platform_get_irq(pdev, 0);
	if (dsi->irq < 0) {
		dev_err(dev, "failed to request dsi irq resource\n");
		return dsi->irq;
	}

	irq_set_status_flags(dsi->irq, IRQ_NOAUTOEN);
	ret = devm_request_threaded_irq(dev, dsi->irq, NULL,
					exynos_dsi_irq, IRQF_ONESHOT,
					dev_name(dev), dsi);
	if (ret) {
		dev_err(dev, "failed to request dsi irq\n");
		return ret;
	}

	platform_set_drvdata(pdev, &dsi->encoder);

	pm_runtime_enable(dev);

	return component_add(dev, &exynos_dsi_component_ops);
}

static int exynos_dsi_remove(struct platform_device *pdev)
{
	struct exynos_dsi *dsi = platform_get_drvdata(pdev);

	of_node_put(dsi->in_bridge_node);

	pm_runtime_disable(&pdev->dev);

	component_del(&pdev->dev, &exynos_dsi_component_ops);

	return 0;
}

static int __maybe_unused exynos_dsi_suspend(struct device *dev)
{
	struct drm_encoder *encoder = dev_get_drvdata(dev);
	struct exynos_dsi *dsi = encoder_to_dsi(encoder);
	const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
	int ret, i;

	usleep_range(10000, 20000);

	if (dsi->state & DSIM_STATE_INITIALIZED) {
		dsi->state &= ~DSIM_STATE_INITIALIZED;

		exynos_dsi_disable_clock(dsi);

		exynos_dsi_disable_irq(dsi);
	}

	dsi->state &= ~DSIM_STATE_CMD_LPM;

	phy_power_off(dsi->phy);

	for (i = driver_data->num_clks - 1; i > -1; i--)
		clk_disable_unprepare(dsi->clks[i]);

	ret = regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
	if (ret < 0)
		dev_err(dsi->dev, "cannot disable regulators %d\n", ret);

	return 0;
}

static int __maybe_unused exynos_dsi_resume(struct device *dev)
{
	struct drm_encoder *encoder = dev_get_drvdata(dev);
	struct exynos_dsi *dsi = encoder_to_dsi(encoder);
	const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
	int ret, i;

	ret = regulator_bulk_enable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
	if (ret < 0) {
		dev_err(dsi->dev, "cannot enable regulators %d\n", ret);
		return ret;
	}

	for (i = 0; i < driver_data->num_clks; i++) {
		ret = clk_prepare_enable(dsi->clks[i]);
		if (ret < 0)
			goto err_clk;
	}

	ret = phy_power_on(dsi->phy);
	if (ret < 0) {
		dev_err(dsi->dev, "cannot enable phy %d\n", ret);
		goto err_clk;
	}

	return 0;

err_clk:
	while (--i > -1)
		clk_disable_unprepare(dsi->clks[i]);
	regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies);

	return ret;
}

static const struct dev_pm_ops exynos_dsi_pm_ops = {
	SET_RUNTIME_PM_OPS(exynos_dsi_suspend, exynos_dsi_resume, NULL)
	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
				pm_runtime_force_resume)
};

struct platform_driver dsi_driver = {
	.probe = exynos_dsi_probe,
	.remove = exynos_dsi_remove,
	.driver = {
		   .name = "exynos-dsi",
		   .owner = THIS_MODULE,
		   .pm = &exynos_dsi_pm_ops,
		   .of_match_table = exynos_dsi_of_match,
	},
};

MODULE_AUTHOR("Tomasz Figa <t.figa@samsung.com>");
MODULE_AUTHOR("Andrzej Hajda <a.hajda@samsung.com>");
MODULE_DESCRIPTION("Samsung SoC MIPI DSI Master");
MODULE_LICENSE("GPL v2");