summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/i915/display/intel_dp.c
blob: 75070eb07d4bfa97587a173b29fb25582cd00389 (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
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
5234
5235
5236
5237
5238
5239
5240
5241
5242
5243
5244
5245
5246
5247
5248
5249
5250
5251
5252
5253
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272
5273
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293
5294
5295
5296
5297
5298
5299
5300
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
5333
5334
5335
5336
5337
5338
5339
5340
5341
5342
5343
5344
5345
5346
5347
5348
5349
5350
5351
5352
5353
5354
5355
5356
5357
5358
5359
5360
5361
5362
5363
5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
/*
 * Copyright © 2008 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * Authors:
 *    Keith Packard <keithp@keithp.com>
 *
 */

#include <linux/export.h>
#include <linux/i2c.h>
#include <linux/notifier.h>
#include <linux/slab.h>
#include <linux/string_helpers.h>
#include <linux/timekeeping.h>
#include <linux/types.h>

#include <asm/byteorder.h>

#include <drm/display/drm_dp_helper.h>
#include <drm/display/drm_dsc_helper.h>
#include <drm/display/drm_hdmi_helper.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_edid.h>
#include <drm/drm_probe_helper.h>

#include "g4x_dp.h"
#include "i915_debugfs.h"
#include "i915_drv.h"
#include "i915_reg.h"
#include "intel_atomic.h"
#include "intel_audio.h"
#include "intel_backlight.h"
#include "intel_combo_phy_regs.h"
#include "intel_connector.h"
#include "intel_crtc.h"
#include "intel_ddi.h"
#include "intel_de.h"
#include "intel_display_types.h"
#include "intel_dp.h"
#include "intel_dp_aux.h"
#include "intel_dp_hdcp.h"
#include "intel_dp_link_training.h"
#include "intel_dp_mst.h"
#include "intel_dpio_phy.h"
#include "intel_dpll.h"
#include "intel_fifo_underrun.h"
#include "intel_hdcp.h"
#include "intel_hdmi.h"
#include "intel_hotplug.h"
#include "intel_lspcon.h"
#include "intel_lvds.h"
#include "intel_panel.h"
#include "intel_pch_display.h"
#include "intel_pps.h"
#include "intel_psr.h"
#include "intel_tc.h"
#include "intel_vdsc.h"
#include "intel_vrr.h"

/* DP DSC throughput values used for slice count calculations KPixels/s */
#define DP_DSC_PEAK_PIXEL_RATE			2720000
#define DP_DSC_MAX_ENC_THROUGHPUT_0		340000
#define DP_DSC_MAX_ENC_THROUGHPUT_1		400000

/* DP DSC FEC Overhead factor = 1/(0.972261) */
#define DP_DSC_FEC_OVERHEAD_FACTOR		972261

/* Compliance test status bits  */
#define INTEL_DP_RESOLUTION_SHIFT_MASK	0
#define INTEL_DP_RESOLUTION_PREFERRED	(1 << INTEL_DP_RESOLUTION_SHIFT_MASK)
#define INTEL_DP_RESOLUTION_STANDARD	(2 << INTEL_DP_RESOLUTION_SHIFT_MASK)
#define INTEL_DP_RESOLUTION_FAILSAFE	(3 << INTEL_DP_RESOLUTION_SHIFT_MASK)


/* Constants for DP DSC configurations */
static const u8 valid_dsc_bpp[] = {6, 8, 10, 12, 15};

/* With Single pipe configuration, HW is capable of supporting maximum
 * of 4 slices per line.
 */
static const u8 valid_dsc_slicecount[] = {1, 2, 4};

/**
 * intel_dp_is_edp - is the given port attached to an eDP panel (either CPU or PCH)
 * @intel_dp: DP struct
 *
 * If a CPU or PCH DP output is attached to an eDP panel, this function
 * will return true, and false otherwise.
 *
 * This function is not safe to use prior to encoder type being set.
 */
bool intel_dp_is_edp(struct intel_dp *intel_dp)
{
	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);

	return dig_port->base.type == INTEL_OUTPUT_EDP;
}

static void intel_dp_unset_edid(struct intel_dp *intel_dp);
static int intel_dp_dsc_compute_bpp(struct intel_dp *intel_dp, u8 dsc_max_bpc);

/* Is link rate UHBR and thus 128b/132b? */
bool intel_dp_is_uhbr(const struct intel_crtc_state *crtc_state)
{
	return crtc_state->port_clock >= 1000000;
}

static void intel_dp_set_default_sink_rates(struct intel_dp *intel_dp)
{
	intel_dp->sink_rates[0] = 162000;
	intel_dp->num_sink_rates = 1;
}

/* update sink rates from dpcd */
static void intel_dp_set_dpcd_sink_rates(struct intel_dp *intel_dp)
{
	static const int dp_rates[] = {
		162000, 270000, 540000, 810000
	};
	int i, max_rate;
	int max_lttpr_rate;

	if (drm_dp_has_quirk(&intel_dp->desc, DP_DPCD_QUIRK_CAN_DO_MAX_LINK_RATE_3_24_GBPS)) {
		/* Needed, e.g., for Apple MBP 2017, 15 inch eDP Retina panel */
		static const int quirk_rates[] = { 162000, 270000, 324000 };

		memcpy(intel_dp->sink_rates, quirk_rates, sizeof(quirk_rates));
		intel_dp->num_sink_rates = ARRAY_SIZE(quirk_rates);

		return;
	}

	/*
	 * Sink rates for 8b/10b.
	 */
	max_rate = drm_dp_bw_code_to_link_rate(intel_dp->dpcd[DP_MAX_LINK_RATE]);
	max_lttpr_rate = drm_dp_lttpr_max_link_rate(intel_dp->lttpr_common_caps);
	if (max_lttpr_rate)
		max_rate = min(max_rate, max_lttpr_rate);

	for (i = 0; i < ARRAY_SIZE(dp_rates); i++) {
		if (dp_rates[i] > max_rate)
			break;
		intel_dp->sink_rates[i] = dp_rates[i];
	}

	/*
	 * Sink rates for 128b/132b. If set, sink should support all 8b/10b
	 * rates and 10 Gbps.
	 */
	if (intel_dp->dpcd[DP_MAIN_LINK_CHANNEL_CODING] & DP_CAP_ANSI_128B132B) {
		u8 uhbr_rates = 0;

		BUILD_BUG_ON(ARRAY_SIZE(intel_dp->sink_rates) < ARRAY_SIZE(dp_rates) + 3);

		drm_dp_dpcd_readb(&intel_dp->aux,
				  DP_128B132B_SUPPORTED_LINK_RATES, &uhbr_rates);

		if (drm_dp_lttpr_count(intel_dp->lttpr_common_caps)) {
			/* We have a repeater */
			if (intel_dp->lttpr_common_caps[0] >= 0x20 &&
			    intel_dp->lttpr_common_caps[DP_MAIN_LINK_CHANNEL_CODING_PHY_REPEATER -
							DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV] &
			    DP_PHY_REPEATER_128B132B_SUPPORTED) {
				/* Repeater supports 128b/132b, valid UHBR rates */
				uhbr_rates &= intel_dp->lttpr_common_caps[DP_PHY_REPEATER_128B132B_RATES -
									  DP_LT_TUNABLE_PHY_REPEATER_FIELD_DATA_STRUCTURE_REV];
			} else {
				/* Does not support 128b/132b */
				uhbr_rates = 0;
			}
		}

		if (uhbr_rates & DP_UHBR10)
			intel_dp->sink_rates[i++] = 1000000;
		if (uhbr_rates & DP_UHBR13_5)
			intel_dp->sink_rates[i++] = 1350000;
		if (uhbr_rates & DP_UHBR20)
			intel_dp->sink_rates[i++] = 2000000;
	}

	intel_dp->num_sink_rates = i;
}

static void intel_dp_set_sink_rates(struct intel_dp *intel_dp)
{
	struct intel_connector *connector = intel_dp->attached_connector;
	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
	struct intel_encoder *encoder = &intel_dig_port->base;

	intel_dp_set_dpcd_sink_rates(intel_dp);

	if (intel_dp->num_sink_rates)
		return;

	drm_err(&dp_to_i915(intel_dp)->drm,
		"[CONNECTOR:%d:%s][ENCODER:%d:%s] Invalid DPCD with no link rates, using defaults\n",
		connector->base.base.id, connector->base.name,
		encoder->base.base.id, encoder->base.name);

	intel_dp_set_default_sink_rates(intel_dp);
}

static void intel_dp_set_default_max_sink_lane_count(struct intel_dp *intel_dp)
{
	intel_dp->max_sink_lane_count = 1;
}

static void intel_dp_set_max_sink_lane_count(struct intel_dp *intel_dp)
{
	struct intel_connector *connector = intel_dp->attached_connector;
	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
	struct intel_encoder *encoder = &intel_dig_port->base;

	intel_dp->max_sink_lane_count = drm_dp_max_lane_count(intel_dp->dpcd);

	switch (intel_dp->max_sink_lane_count) {
	case 1:
	case 2:
	case 4:
		return;
	}

	drm_err(&dp_to_i915(intel_dp)->drm,
		"[CONNECTOR:%d:%s][ENCODER:%d:%s] Invalid DPCD max lane count (%d), using default\n",
		connector->base.base.id, connector->base.name,
		encoder->base.base.id, encoder->base.name,
		intel_dp->max_sink_lane_count);

	intel_dp_set_default_max_sink_lane_count(intel_dp);
}

/* Get length of rates array potentially limited by max_rate. */
static int intel_dp_rate_limit_len(const int *rates, int len, int max_rate)
{
	int i;

	/* Limit results by potentially reduced max rate */
	for (i = 0; i < len; i++) {
		if (rates[len - i - 1] <= max_rate)
			return len - i;
	}

	return 0;
}

/* Get length of common rates array potentially limited by max_rate. */
static int intel_dp_common_len_rate_limit(const struct intel_dp *intel_dp,
					  int max_rate)
{
	return intel_dp_rate_limit_len(intel_dp->common_rates,
				       intel_dp->num_common_rates, max_rate);
}

static int intel_dp_common_rate(struct intel_dp *intel_dp, int index)
{
	if (drm_WARN_ON(&dp_to_i915(intel_dp)->drm,
			index < 0 || index >= intel_dp->num_common_rates))
		return 162000;

	return intel_dp->common_rates[index];
}

/* Theoretical max between source and sink */
static int intel_dp_max_common_rate(struct intel_dp *intel_dp)
{
	return intel_dp_common_rate(intel_dp, intel_dp->num_common_rates - 1);
}

static int intel_dp_max_source_lane_count(struct intel_digital_port *dig_port)
{
	int vbt_max_lanes = intel_bios_dp_max_lane_count(&dig_port->base);
	int max_lanes = dig_port->max_lanes;

	if (vbt_max_lanes)
		max_lanes = min(max_lanes, vbt_max_lanes);

	return max_lanes;
}

/* Theoretical max between source and sink */
static int intel_dp_max_common_lane_count(struct intel_dp *intel_dp)
{
	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
	int source_max = intel_dp_max_source_lane_count(dig_port);
	int sink_max = intel_dp->max_sink_lane_count;
	int fia_max = intel_tc_port_fia_max_lane_count(dig_port);
	int lttpr_max = drm_dp_lttpr_max_lane_count(intel_dp->lttpr_common_caps);

	if (lttpr_max)
		sink_max = min(sink_max, lttpr_max);

	return min3(source_max, sink_max, fia_max);
}

int intel_dp_max_lane_count(struct intel_dp *intel_dp)
{
	switch (intel_dp->max_link_lane_count) {
	case 1:
	case 2:
	case 4:
		return intel_dp->max_link_lane_count;
	default:
		MISSING_CASE(intel_dp->max_link_lane_count);
		return 1;
	}
}

/*
 * The required data bandwidth for a mode with given pixel clock and bpp. This
 * is the required net bandwidth independent of the data bandwidth efficiency.
 */
int
intel_dp_link_required(int pixel_clock, int bpp)
{
	/* pixel_clock is in kHz, divide bpp by 8 for bit to Byte conversion */
	return DIV_ROUND_UP(pixel_clock * bpp, 8);
}

/*
 * Given a link rate and lanes, get the data bandwidth.
 *
 * Data bandwidth is the actual payload rate, which depends on the data
 * bandwidth efficiency and the link rate.
 *
 * For 8b/10b channel encoding, SST and non-FEC, the data bandwidth efficiency
 * is 80%. For example, for a 1.62 Gbps link, 1.62*10^9 bps * 0.80 * (1/8) =
 * 162000 kBps. With 8-bit symbols, we have 162000 kHz symbol clock. Just by
 * coincidence, the port clock in kHz matches the data bandwidth in kBps, and
 * they equal the link bit rate in Gbps multiplied by 100000. (Note that this no
 * longer holds for data bandwidth as soon as FEC or MST is taken into account!)
 *
 * For 128b/132b channel encoding, the data bandwidth efficiency is 96.71%. For
 * example, for a 10 Gbps link, 10*10^9 bps * 0.9671 * (1/8) = 1208875
 * kBps. With 32-bit symbols, we have 312500 kHz symbol clock. The value 1000000
 * does not match the symbol clock, the port clock (not even if you think in
 * terms of a byte clock), nor the data bandwidth. It only matches the link bit
 * rate in units of 10000 bps.
 */
int
intel_dp_max_data_rate(int max_link_rate, int max_lanes)
{
	if (max_link_rate >= 1000000) {
		/*
		 * UHBR rates always use 128b/132b channel encoding, and have
		 * 97.71% data bandwidth efficiency. Consider max_link_rate the
		 * link bit rate in units of 10000 bps.
		 */
		int max_link_rate_kbps = max_link_rate * 10;

		max_link_rate_kbps = DIV_ROUND_CLOSEST_ULL(mul_u32_u32(max_link_rate_kbps, 9671), 10000);
		max_link_rate = max_link_rate_kbps / 8;
	}

	/*
	 * Lower than UHBR rates always use 8b/10b channel encoding, and have
	 * 80% data bandwidth efficiency for SST non-FEC. However, this turns
	 * out to be a nop by coincidence, and can be skipped:
	 *
	 *	int max_link_rate_kbps = max_link_rate * 10;
	 *	max_link_rate_kbps = DIV_ROUND_CLOSEST_ULL(max_link_rate_kbps * 8, 10);
	 *	max_link_rate = max_link_rate_kbps / 8;
	 */

	return max_link_rate * max_lanes;
}

bool intel_dp_can_bigjoiner(struct intel_dp *intel_dp)
{
	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
	struct intel_encoder *encoder = &intel_dig_port->base;
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);

	return DISPLAY_VER(dev_priv) >= 12 ||
		(DISPLAY_VER(dev_priv) == 11 &&
		 encoder->port != PORT_A);
}

static int dg2_max_source_rate(struct intel_dp *intel_dp)
{
	return intel_dp_is_edp(intel_dp) ? 810000 : 1350000;
}

static int icl_max_source_rate(struct intel_dp *intel_dp)
{
	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
	struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
	enum phy phy = intel_port_to_phy(dev_priv, dig_port->base.port);

	if (intel_phy_is_combo(dev_priv, phy) && !intel_dp_is_edp(intel_dp))
		return 540000;

	return 810000;
}

static int ehl_max_source_rate(struct intel_dp *intel_dp)
{
	if (intel_dp_is_edp(intel_dp))
		return 540000;

	return 810000;
}

static int vbt_max_link_rate(struct intel_dp *intel_dp)
{
	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
	int max_rate;

	max_rate = intel_bios_dp_max_link_rate(encoder);

	if (intel_dp_is_edp(intel_dp)) {
		struct intel_connector *connector = intel_dp->attached_connector;
		int edp_max_rate = connector->panel.vbt.edp.max_link_rate;

		if (max_rate && edp_max_rate)
			max_rate = min(max_rate, edp_max_rate);
		else if (edp_max_rate)
			max_rate = edp_max_rate;
	}

	return max_rate;
}

static void
intel_dp_set_source_rates(struct intel_dp *intel_dp)
{
	/* The values must be in increasing order */
	static const int icl_rates[] = {
		162000, 216000, 270000, 324000, 432000, 540000, 648000, 810000,
		1000000, 1350000,
	};
	static const int bxt_rates[] = {
		162000, 216000, 243000, 270000, 324000, 432000, 540000
	};
	static const int skl_rates[] = {
		162000, 216000, 270000, 324000, 432000, 540000
	};
	static const int hsw_rates[] = {
		162000, 270000, 540000
	};
	static const int g4x_rates[] = {
		162000, 270000
	};
	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
	struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
	const int *source_rates;
	int size, max_rate = 0, vbt_max_rate;

	/* This should only be done once */
	drm_WARN_ON(&dev_priv->drm,
		    intel_dp->source_rates || intel_dp->num_source_rates);

	if (DISPLAY_VER(dev_priv) >= 11) {
		source_rates = icl_rates;
		size = ARRAY_SIZE(icl_rates);
		if (IS_DG2(dev_priv))
			max_rate = dg2_max_source_rate(intel_dp);
		else if (IS_ALDERLAKE_P(dev_priv) || IS_ALDERLAKE_S(dev_priv) ||
			 IS_DG1(dev_priv) || IS_ROCKETLAKE(dev_priv))
			max_rate = 810000;
		else if (IS_JSL_EHL(dev_priv))
			max_rate = ehl_max_source_rate(intel_dp);
		else
			max_rate = icl_max_source_rate(intel_dp);
	} else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
		source_rates = bxt_rates;
		size = ARRAY_SIZE(bxt_rates);
	} else if (DISPLAY_VER(dev_priv) == 9) {
		source_rates = skl_rates;
		size = ARRAY_SIZE(skl_rates);
	} else if ((IS_HASWELL(dev_priv) && !IS_HSW_ULX(dev_priv)) ||
		   IS_BROADWELL(dev_priv)) {
		source_rates = hsw_rates;
		size = ARRAY_SIZE(hsw_rates);
	} else {
		source_rates = g4x_rates;
		size = ARRAY_SIZE(g4x_rates);
	}

	vbt_max_rate = vbt_max_link_rate(intel_dp);
	if (max_rate && vbt_max_rate)
		max_rate = min(max_rate, vbt_max_rate);
	else if (vbt_max_rate)
		max_rate = vbt_max_rate;

	if (max_rate)
		size = intel_dp_rate_limit_len(source_rates, size, max_rate);

	intel_dp->source_rates = source_rates;
	intel_dp->num_source_rates = size;
}

static int intersect_rates(const int *source_rates, int source_len,
			   const int *sink_rates, int sink_len,
			   int *common_rates)
{
	int i = 0, j = 0, k = 0;

	while (i < source_len && j < sink_len) {
		if (source_rates[i] == sink_rates[j]) {
			if (WARN_ON(k >= DP_MAX_SUPPORTED_RATES))
				return k;
			common_rates[k] = source_rates[i];
			++k;
			++i;
			++j;
		} else if (source_rates[i] < sink_rates[j]) {
			++i;
		} else {
			++j;
		}
	}
	return k;
}

/* return index of rate in rates array, or -1 if not found */
static int intel_dp_rate_index(const int *rates, int len, int rate)
{
	int i;

	for (i = 0; i < len; i++)
		if (rate == rates[i])
			return i;

	return -1;
}

static void intel_dp_set_common_rates(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);

	drm_WARN_ON(&i915->drm,
		    !intel_dp->num_source_rates || !intel_dp->num_sink_rates);

	intel_dp->num_common_rates = intersect_rates(intel_dp->source_rates,
						     intel_dp->num_source_rates,
						     intel_dp->sink_rates,
						     intel_dp->num_sink_rates,
						     intel_dp->common_rates);

	/* Paranoia, there should always be something in common. */
	if (drm_WARN_ON(&i915->drm, intel_dp->num_common_rates == 0)) {
		intel_dp->common_rates[0] = 162000;
		intel_dp->num_common_rates = 1;
	}
}

static bool intel_dp_link_params_valid(struct intel_dp *intel_dp, int link_rate,
				       u8 lane_count)
{
	/*
	 * FIXME: we need to synchronize the current link parameters with
	 * hardware readout. Currently fast link training doesn't work on
	 * boot-up.
	 */
	if (link_rate == 0 ||
	    link_rate > intel_dp->max_link_rate)
		return false;

	if (lane_count == 0 ||
	    lane_count > intel_dp_max_lane_count(intel_dp))
		return false;

	return true;
}

static bool intel_dp_can_link_train_fallback_for_edp(struct intel_dp *intel_dp,
						     int link_rate,
						     u8 lane_count)
{
	/* FIXME figure out what we actually want here */
	const struct drm_display_mode *fixed_mode =
		intel_panel_preferred_fixed_mode(intel_dp->attached_connector);
	int mode_rate, max_rate;

	mode_rate = intel_dp_link_required(fixed_mode->clock, 18);
	max_rate = intel_dp_max_data_rate(link_rate, lane_count);
	if (mode_rate > max_rate)
		return false;

	return true;
}

int intel_dp_get_link_train_fallback_values(struct intel_dp *intel_dp,
					    int link_rate, u8 lane_count)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	int index;

	/*
	 * TODO: Enable fallback on MST links once MST link compute can handle
	 * the fallback params.
	 */
	if (intel_dp->is_mst) {
		drm_err(&i915->drm, "Link Training Unsuccessful\n");
		return -1;
	}

	if (intel_dp_is_edp(intel_dp) && !intel_dp->use_max_params) {
		drm_dbg_kms(&i915->drm,
			    "Retrying Link training for eDP with max parameters\n");
		intel_dp->use_max_params = true;
		return 0;
	}

	index = intel_dp_rate_index(intel_dp->common_rates,
				    intel_dp->num_common_rates,
				    link_rate);
	if (index > 0) {
		if (intel_dp_is_edp(intel_dp) &&
		    !intel_dp_can_link_train_fallback_for_edp(intel_dp,
							      intel_dp_common_rate(intel_dp, index - 1),
							      lane_count)) {
			drm_dbg_kms(&i915->drm,
				    "Retrying Link training for eDP with same parameters\n");
			return 0;
		}
		intel_dp->max_link_rate = intel_dp_common_rate(intel_dp, index - 1);
		intel_dp->max_link_lane_count = lane_count;
	} else if (lane_count > 1) {
		if (intel_dp_is_edp(intel_dp) &&
		    !intel_dp_can_link_train_fallback_for_edp(intel_dp,
							      intel_dp_max_common_rate(intel_dp),
							      lane_count >> 1)) {
			drm_dbg_kms(&i915->drm,
				    "Retrying Link training for eDP with same parameters\n");
			return 0;
		}
		intel_dp->max_link_rate = intel_dp_max_common_rate(intel_dp);
		intel_dp->max_link_lane_count = lane_count >> 1;
	} else {
		drm_err(&i915->drm, "Link Training Unsuccessful\n");
		return -1;
	}

	return 0;
}

u32 intel_dp_mode_to_fec_clock(u32 mode_clock)
{
	return div_u64(mul_u32_u32(mode_clock, 1000000U),
		       DP_DSC_FEC_OVERHEAD_FACTOR);
}

static int
small_joiner_ram_size_bits(struct drm_i915_private *i915)
{
	if (DISPLAY_VER(i915) >= 13)
		return 17280 * 8;
	else if (DISPLAY_VER(i915) >= 11)
		return 7680 * 8;
	else
		return 6144 * 8;
}

static u16 intel_dp_dsc_get_output_bpp(struct drm_i915_private *i915,
				       u32 link_clock, u32 lane_count,
				       u32 mode_clock, u32 mode_hdisplay,
				       bool bigjoiner,
				       u32 pipe_bpp)
{
	u32 bits_per_pixel, max_bpp_small_joiner_ram;
	int i;

	/*
	 * Available Link Bandwidth(Kbits/sec) = (NumberOfLanes)*
	 * (LinkSymbolClock)* 8 * (TimeSlotsPerMTP)
	 * for SST -> TimeSlotsPerMTP is 1,
	 * for MST -> TimeSlotsPerMTP has to be calculated
	 */
	bits_per_pixel = (link_clock * lane_count * 8) /
			 intel_dp_mode_to_fec_clock(mode_clock);

	/* Small Joiner Check: output bpp <= joiner RAM (bits) / Horiz. width */
	max_bpp_small_joiner_ram = small_joiner_ram_size_bits(i915) /
		mode_hdisplay;

	if (bigjoiner)
		max_bpp_small_joiner_ram *= 2;

	/*
	 * Greatest allowed DSC BPP = MIN (output BPP from available Link BW
	 * check, output bpp from small joiner RAM check)
	 */
	bits_per_pixel = min(bits_per_pixel, max_bpp_small_joiner_ram);

	if (bigjoiner) {
		u32 max_bpp_bigjoiner =
			i915->display.cdclk.max_cdclk_freq * 48 /
			intel_dp_mode_to_fec_clock(mode_clock);

		bits_per_pixel = min(bits_per_pixel, max_bpp_bigjoiner);
	}

	/* Error out if the max bpp is less than smallest allowed valid bpp */
	if (bits_per_pixel < valid_dsc_bpp[0]) {
		drm_dbg_kms(&i915->drm, "Unsupported BPP %u, min %u\n",
			    bits_per_pixel, valid_dsc_bpp[0]);
		return 0;
	}

	/* From XE_LPD onwards we support from bpc upto uncompressed bpp-1 BPPs */
	if (DISPLAY_VER(i915) >= 13) {
		bits_per_pixel = min(bits_per_pixel, pipe_bpp - 1);
	} else {
		/* Find the nearest match in the array of known BPPs from VESA */
		for (i = 0; i < ARRAY_SIZE(valid_dsc_bpp) - 1; i++) {
			if (bits_per_pixel < valid_dsc_bpp[i + 1])
				break;
		}
		bits_per_pixel = valid_dsc_bpp[i];
	}

	/*
	 * Compressed BPP in U6.4 format so multiply by 16, for Gen 11,
	 * fractional part is 0
	 */
	return bits_per_pixel << 4;
}

static u8 intel_dp_dsc_get_slice_count(struct intel_dp *intel_dp,
				       int mode_clock, int mode_hdisplay,
				       bool bigjoiner)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	u8 min_slice_count, i;
	int max_slice_width;

	if (mode_clock <= DP_DSC_PEAK_PIXEL_RATE)
		min_slice_count = DIV_ROUND_UP(mode_clock,
					       DP_DSC_MAX_ENC_THROUGHPUT_0);
	else
		min_slice_count = DIV_ROUND_UP(mode_clock,
					       DP_DSC_MAX_ENC_THROUGHPUT_1);

	max_slice_width = drm_dp_dsc_sink_max_slice_width(intel_dp->dsc_dpcd);
	if (max_slice_width < DP_DSC_MIN_SLICE_WIDTH_VALUE) {
		drm_dbg_kms(&i915->drm,
			    "Unsupported slice width %d by DP DSC Sink device\n",
			    max_slice_width);
		return 0;
	}
	/* Also take into account max slice width */
	min_slice_count = max_t(u8, min_slice_count,
				DIV_ROUND_UP(mode_hdisplay,
					     max_slice_width));

	/* Find the closest match to the valid slice count values */
	for (i = 0; i < ARRAY_SIZE(valid_dsc_slicecount); i++) {
		u8 test_slice_count = valid_dsc_slicecount[i] << bigjoiner;

		if (test_slice_count >
		    drm_dp_dsc_sink_max_slice_count(intel_dp->dsc_dpcd, false))
			break;

		/* big joiner needs small joiner to be enabled */
		if (bigjoiner && test_slice_count < 4)
			continue;

		if (min_slice_count <= test_slice_count)
			return test_slice_count;
	}

	drm_dbg_kms(&i915->drm, "Unsupported Slice Count %d\n",
		    min_slice_count);
	return 0;
}

static enum intel_output_format
intel_dp_output_format(struct intel_connector *connector,
		       bool ycbcr_420_output)
{
	struct intel_dp *intel_dp = intel_attached_dp(connector);

	if (!connector->base.ycbcr_420_allowed || !ycbcr_420_output)
		return INTEL_OUTPUT_FORMAT_RGB;

	if (intel_dp->dfp.rgb_to_ycbcr &&
	    intel_dp->dfp.ycbcr_444_to_420)
		return INTEL_OUTPUT_FORMAT_RGB;

	if (intel_dp->dfp.ycbcr_444_to_420)
		return INTEL_OUTPUT_FORMAT_YCBCR444;
	else
		return INTEL_OUTPUT_FORMAT_YCBCR420;
}

int intel_dp_min_bpp(enum intel_output_format output_format)
{
	if (output_format == INTEL_OUTPUT_FORMAT_RGB)
		return 6 * 3;
	else
		return 8 * 3;
}

static int intel_dp_output_bpp(enum intel_output_format output_format, int bpp)
{
	/*
	 * bpp value was assumed to RGB format. And YCbCr 4:2:0 output
	 * format of the number of bytes per pixel will be half the number
	 * of bytes of RGB pixel.
	 */
	if (output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
		bpp /= 2;

	return bpp;
}

static int
intel_dp_mode_min_output_bpp(struct intel_connector *connector,
			     const struct drm_display_mode *mode)
{
	const struct drm_display_info *info = &connector->base.display_info;
	enum intel_output_format output_format =
		intel_dp_output_format(connector, drm_mode_is_420_only(info, mode));

	return intel_dp_output_bpp(output_format, intel_dp_min_bpp(output_format));
}

static bool intel_dp_hdisplay_bad(struct drm_i915_private *dev_priv,
				  int hdisplay)
{
	/*
	 * Older platforms don't like hdisplay==4096 with DP.
	 *
	 * On ILK/SNB/IVB the pipe seems to be somewhat running (scanline
	 * and frame counter increment), but we don't get vblank interrupts,
	 * and the pipe underruns immediately. The link also doesn't seem
	 * to get trained properly.
	 *
	 * On CHV the vblank interrupts don't seem to disappear but
	 * otherwise the symptoms are similar.
	 *
	 * TODO: confirm the behaviour on HSW+
	 */
	return hdisplay == 4096 && !HAS_DDI(dev_priv);
}

static int intel_dp_max_tmds_clock(struct intel_dp *intel_dp)
{
	struct intel_connector *connector = intel_dp->attached_connector;
	const struct drm_display_info *info = &connector->base.display_info;
	int max_tmds_clock = intel_dp->dfp.max_tmds_clock;

	/* Only consider the sink's max TMDS clock if we know this is a HDMI DFP */
	if (max_tmds_clock && info->max_tmds_clock)
		max_tmds_clock = min(max_tmds_clock, info->max_tmds_clock);

	return max_tmds_clock;
}

static enum drm_mode_status
intel_dp_tmds_clock_valid(struct intel_dp *intel_dp,
			  int clock, int bpc, bool ycbcr420_output,
			  bool respect_downstream_limits)
{
	int tmds_clock, min_tmds_clock, max_tmds_clock;

	if (!respect_downstream_limits)
		return MODE_OK;

	tmds_clock = intel_hdmi_tmds_clock(clock, bpc, ycbcr420_output);

	min_tmds_clock = intel_dp->dfp.min_tmds_clock;
	max_tmds_clock = intel_dp_max_tmds_clock(intel_dp);

	if (min_tmds_clock && tmds_clock < min_tmds_clock)
		return MODE_CLOCK_LOW;

	if (max_tmds_clock && tmds_clock > max_tmds_clock)
		return MODE_CLOCK_HIGH;

	return MODE_OK;
}

static enum drm_mode_status
intel_dp_mode_valid_downstream(struct intel_connector *connector,
			       const struct drm_display_mode *mode,
			       int target_clock)
{
	struct intel_dp *intel_dp = intel_attached_dp(connector);
	const struct drm_display_info *info = &connector->base.display_info;
	enum drm_mode_status status;
	bool ycbcr_420_only;

	/* If PCON supports FRL MODE, check FRL bandwidth constraints */
	if (intel_dp->dfp.pcon_max_frl_bw) {
		int target_bw;
		int max_frl_bw;
		int bpp = intel_dp_mode_min_output_bpp(connector, mode);

		target_bw = bpp * target_clock;

		max_frl_bw = intel_dp->dfp.pcon_max_frl_bw;

		/* converting bw from Gbps to Kbps*/
		max_frl_bw = max_frl_bw * 1000000;

		if (target_bw > max_frl_bw)
			return MODE_CLOCK_HIGH;

		return MODE_OK;
	}

	if (intel_dp->dfp.max_dotclock &&
	    target_clock > intel_dp->dfp.max_dotclock)
		return MODE_CLOCK_HIGH;

	ycbcr_420_only = drm_mode_is_420_only(info, mode);

	/* Assume 8bpc for the DP++/HDMI/DVI TMDS clock check */
	status = intel_dp_tmds_clock_valid(intel_dp, target_clock,
					   8, ycbcr_420_only, true);

	if (status != MODE_OK) {
		if (ycbcr_420_only ||
		    !connector->base.ycbcr_420_allowed ||
		    !drm_mode_is_420_also(info, mode))
			return status;

		status = intel_dp_tmds_clock_valid(intel_dp, target_clock,
						   8, true, true);
		if (status != MODE_OK)
			return status;
	}

	return MODE_OK;
}

static bool intel_dp_need_bigjoiner(struct intel_dp *intel_dp,
				    int hdisplay, int clock)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);

	if (!intel_dp_can_bigjoiner(intel_dp))
		return false;

	return clock > i915->max_dotclk_freq || hdisplay > 5120;
}

static enum drm_mode_status
intel_dp_mode_valid(struct drm_connector *_connector,
		    struct drm_display_mode *mode)
{
	struct intel_connector *connector = to_intel_connector(_connector);
	struct intel_dp *intel_dp = intel_attached_dp(connector);
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	const struct drm_display_mode *fixed_mode;
	int target_clock = mode->clock;
	int max_rate, mode_rate, max_lanes, max_link_clock;
	int max_dotclk = dev_priv->max_dotclk_freq;
	u16 dsc_max_output_bpp = 0;
	u8 dsc_slice_count = 0;
	enum drm_mode_status status;
	bool dsc = false, bigjoiner = false;

	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
		return MODE_NO_DBLESCAN;

	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
		return MODE_H_ILLEGAL;

	fixed_mode = intel_panel_fixed_mode(connector, mode);
	if (intel_dp_is_edp(intel_dp) && fixed_mode) {
		status = intel_panel_mode_valid(connector, mode);
		if (status != MODE_OK)
			return status;

		target_clock = fixed_mode->clock;
	}

	if (mode->clock < 10000)
		return MODE_CLOCK_LOW;

	if (intel_dp_need_bigjoiner(intel_dp, mode->hdisplay, target_clock)) {
		bigjoiner = true;
		max_dotclk *= 2;
	}
	if (target_clock > max_dotclk)
		return MODE_CLOCK_HIGH;

	max_link_clock = intel_dp_max_link_rate(intel_dp);
	max_lanes = intel_dp_max_lane_count(intel_dp);

	max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
	mode_rate = intel_dp_link_required(target_clock,
					   intel_dp_mode_min_output_bpp(connector, mode));

	if (intel_dp_hdisplay_bad(dev_priv, mode->hdisplay))
		return MODE_H_ILLEGAL;

	/*
	 * Output bpp is stored in 6.4 format so right shift by 4 to get the
	 * integer value since we support only integer values of bpp.
	 */
	if (DISPLAY_VER(dev_priv) >= 10 &&
	    drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd)) {
		/*
		 * TBD pass the connector BPC,
		 * for now U8_MAX so that max BPC on that platform would be picked
		 */
		int pipe_bpp = intel_dp_dsc_compute_bpp(intel_dp, U8_MAX);

		if (intel_dp_is_edp(intel_dp)) {
			dsc_max_output_bpp =
				drm_edp_dsc_sink_output_bpp(intel_dp->dsc_dpcd) >> 4;
			dsc_slice_count =
				drm_dp_dsc_sink_max_slice_count(intel_dp->dsc_dpcd,
								true);
		} else if (drm_dp_sink_supports_fec(intel_dp->fec_capable)) {
			dsc_max_output_bpp =
				intel_dp_dsc_get_output_bpp(dev_priv,
							    max_link_clock,
							    max_lanes,
							    target_clock,
							    mode->hdisplay,
							    bigjoiner,
							    pipe_bpp) >> 4;
			dsc_slice_count =
				intel_dp_dsc_get_slice_count(intel_dp,
							     target_clock,
							     mode->hdisplay,
							     bigjoiner);
		}

		dsc = dsc_max_output_bpp && dsc_slice_count;
	}

	/*
	 * Big joiner configuration needs DSC for TGL which is not true for
	 * XE_LPD where uncompressed joiner is supported.
	 */
	if (DISPLAY_VER(dev_priv) < 13 && bigjoiner && !dsc)
		return MODE_CLOCK_HIGH;

	if (mode_rate > max_rate && !dsc)
		return MODE_CLOCK_HIGH;

	status = intel_dp_mode_valid_downstream(connector, mode, target_clock);
	if (status != MODE_OK)
		return status;

	return intel_mode_valid_max_plane_size(dev_priv, mode, bigjoiner);
}

bool intel_dp_source_supports_tps3(struct drm_i915_private *i915)
{
	return DISPLAY_VER(i915) >= 9 || IS_BROADWELL(i915) || IS_HASWELL(i915);
}

bool intel_dp_source_supports_tps4(struct drm_i915_private *i915)
{
	return DISPLAY_VER(i915) >= 10;
}

static void snprintf_int_array(char *str, size_t len,
			       const int *array, int nelem)
{
	int i;

	str[0] = '\0';

	for (i = 0; i < nelem; i++) {
		int r = snprintf(str, len, "%s%d", i ? ", " : "", array[i]);
		if (r >= len)
			return;
		str += r;
		len -= r;
	}
}

static void intel_dp_print_rates(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	char str[128]; /* FIXME: too big for stack? */

	if (!drm_debug_enabled(DRM_UT_KMS))
		return;

	snprintf_int_array(str, sizeof(str),
			   intel_dp->source_rates, intel_dp->num_source_rates);
	drm_dbg_kms(&i915->drm, "source rates: %s\n", str);

	snprintf_int_array(str, sizeof(str),
			   intel_dp->sink_rates, intel_dp->num_sink_rates);
	drm_dbg_kms(&i915->drm, "sink rates: %s\n", str);

	snprintf_int_array(str, sizeof(str),
			   intel_dp->common_rates, intel_dp->num_common_rates);
	drm_dbg_kms(&i915->drm, "common rates: %s\n", str);
}

int
intel_dp_max_link_rate(struct intel_dp *intel_dp)
{
	int len;

	len = intel_dp_common_len_rate_limit(intel_dp, intel_dp->max_link_rate);

	return intel_dp_common_rate(intel_dp, len - 1);
}

int intel_dp_rate_select(struct intel_dp *intel_dp, int rate)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	int i = intel_dp_rate_index(intel_dp->sink_rates,
				    intel_dp->num_sink_rates, rate);

	if (drm_WARN_ON(&i915->drm, i < 0))
		i = 0;

	return i;
}

void intel_dp_compute_rate(struct intel_dp *intel_dp, int port_clock,
			   u8 *link_bw, u8 *rate_select)
{
	/* eDP 1.4 rate select method. */
	if (intel_dp->use_rate_select) {
		*link_bw = 0;
		*rate_select =
			intel_dp_rate_select(intel_dp, port_clock);
	} else {
		*link_bw = drm_dp_link_rate_to_bw_code(port_clock);
		*rate_select = 0;
	}
}

static bool intel_dp_source_supports_fec(struct intel_dp *intel_dp,
					 const struct intel_crtc_state *pipe_config)
{
	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);

	/* On TGL, FEC is supported on all Pipes */
	if (DISPLAY_VER(dev_priv) >= 12)
		return true;

	if (DISPLAY_VER(dev_priv) == 11 && pipe_config->cpu_transcoder != TRANSCODER_A)
		return true;

	return false;
}

static bool intel_dp_supports_fec(struct intel_dp *intel_dp,
				  const struct intel_crtc_state *pipe_config)
{
	return intel_dp_source_supports_fec(intel_dp, pipe_config) &&
		drm_dp_sink_supports_fec(intel_dp->fec_capable);
}

static bool intel_dp_supports_dsc(struct intel_dp *intel_dp,
				  const struct intel_crtc_state *crtc_state)
{
	if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP) && !crtc_state->fec_enable)
		return false;

	return intel_dsc_source_support(crtc_state) &&
		drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd);
}

static bool intel_dp_is_ycbcr420(struct intel_dp *intel_dp,
				 const struct intel_crtc_state *crtc_state)
{
	return crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
		(crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR444 &&
		 intel_dp->dfp.ycbcr_444_to_420);
}

static int intel_dp_hdmi_compute_bpc(struct intel_dp *intel_dp,
				     const struct intel_crtc_state *crtc_state,
				     int bpc, bool respect_downstream_limits)
{
	bool ycbcr420_output = intel_dp_is_ycbcr420(intel_dp, crtc_state);
	int clock = crtc_state->hw.adjusted_mode.crtc_clock;

	/*
	 * Current bpc could already be below 8bpc due to
	 * FDI bandwidth constraints or other limits.
	 * HDMI minimum is 8bpc however.
	 */
	bpc = max(bpc, 8);

	/*
	 * We will never exceed downstream TMDS clock limits while
	 * attempting deep color. If the user insists on forcing an
	 * out of spec mode they will have to be satisfied with 8bpc.
	 */
	if (!respect_downstream_limits)
		bpc = 8;

	for (; bpc >= 8; bpc -= 2) {
		if (intel_hdmi_bpc_possible(crtc_state, bpc,
					    intel_dp->has_hdmi_sink, ycbcr420_output) &&
		    intel_dp_tmds_clock_valid(intel_dp, clock, bpc, ycbcr420_output,
					      respect_downstream_limits) == MODE_OK)
			return bpc;
	}

	return -EINVAL;
}

static int intel_dp_max_bpp(struct intel_dp *intel_dp,
			    const struct intel_crtc_state *crtc_state,
			    bool respect_downstream_limits)
{
	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
	struct intel_connector *intel_connector = intel_dp->attached_connector;
	int bpp, bpc;

	bpc = crtc_state->pipe_bpp / 3;

	if (intel_dp->dfp.max_bpc)
		bpc = min_t(int, bpc, intel_dp->dfp.max_bpc);

	if (intel_dp->dfp.min_tmds_clock) {
		int max_hdmi_bpc;

		max_hdmi_bpc = intel_dp_hdmi_compute_bpc(intel_dp, crtc_state, bpc,
							 respect_downstream_limits);
		if (max_hdmi_bpc < 0)
			return 0;

		bpc = min(bpc, max_hdmi_bpc);
	}

	bpp = bpc * 3;
	if (intel_dp_is_edp(intel_dp)) {
		/* Get bpp from vbt only for panels that dont have bpp in edid */
		if (intel_connector->base.display_info.bpc == 0 &&
		    intel_connector->panel.vbt.edp.bpp &&
		    intel_connector->panel.vbt.edp.bpp < bpp) {
			drm_dbg_kms(&dev_priv->drm,
				    "clamping bpp for eDP panel to BIOS-provided %i\n",
				    intel_connector->panel.vbt.edp.bpp);
			bpp = intel_connector->panel.vbt.edp.bpp;
		}
	}

	return bpp;
}

/* Adjust link config limits based on compliance test requests. */
void
intel_dp_adjust_compliance_config(struct intel_dp *intel_dp,
				  struct intel_crtc_state *pipe_config,
				  struct link_config_limits *limits)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);

	/* For DP Compliance we override the computed bpp for the pipe */
	if (intel_dp->compliance.test_data.bpc != 0) {
		int bpp = 3 * intel_dp->compliance.test_data.bpc;

		limits->min_bpp = limits->max_bpp = bpp;
		pipe_config->dither_force_disable = bpp == 6 * 3;

		drm_dbg_kms(&i915->drm, "Setting pipe_bpp to %d\n", bpp);
	}

	/* Use values requested by Compliance Test Request */
	if (intel_dp->compliance.test_type == DP_TEST_LINK_TRAINING) {
		int index;

		/* Validate the compliance test data since max values
		 * might have changed due to link train fallback.
		 */
		if (intel_dp_link_params_valid(intel_dp, intel_dp->compliance.test_link_rate,
					       intel_dp->compliance.test_lane_count)) {
			index = intel_dp_rate_index(intel_dp->common_rates,
						    intel_dp->num_common_rates,
						    intel_dp->compliance.test_link_rate);
			if (index >= 0)
				limits->min_rate = limits->max_rate =
					intel_dp->compliance.test_link_rate;
			limits->min_lane_count = limits->max_lane_count =
				intel_dp->compliance.test_lane_count;
		}
	}
}

static bool has_seamless_m_n(struct intel_connector *connector)
{
	struct drm_i915_private *i915 = to_i915(connector->base.dev);

	/*
	 * Seamless M/N reprogramming only implemented
	 * for BDW+ double buffered M/N registers so far.
	 */
	return HAS_DOUBLE_BUFFERED_M_N(i915) &&
		intel_panel_drrs_type(connector) == DRRS_TYPE_SEAMLESS;
}

static int intel_dp_mode_clock(const struct intel_crtc_state *crtc_state,
			       const struct drm_connector_state *conn_state)
{
	struct intel_connector *connector = to_intel_connector(conn_state->connector);
	const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;

	/* FIXME a bit of a mess wrt clock vs. crtc_clock */
	if (has_seamless_m_n(connector))
		return intel_panel_highest_mode(connector, adjusted_mode)->clock;
	else
		return adjusted_mode->crtc_clock;
}

/* Optimize link config in order: max bpp, min clock, min lanes */
static int
intel_dp_compute_link_config_wide(struct intel_dp *intel_dp,
				  struct intel_crtc_state *pipe_config,
				  const struct drm_connector_state *conn_state,
				  const struct link_config_limits *limits)
{
	int bpp, i, lane_count, clock = intel_dp_mode_clock(pipe_config, conn_state);
	int mode_rate, link_rate, link_avail;

	for (bpp = limits->max_bpp; bpp >= limits->min_bpp; bpp -= 2 * 3) {
		int output_bpp = intel_dp_output_bpp(pipe_config->output_format, bpp);

		mode_rate = intel_dp_link_required(clock, output_bpp);

		for (i = 0; i < intel_dp->num_common_rates; i++) {
			link_rate = intel_dp_common_rate(intel_dp, i);
			if (link_rate < limits->min_rate ||
			    link_rate > limits->max_rate)
				continue;

			for (lane_count = limits->min_lane_count;
			     lane_count <= limits->max_lane_count;
			     lane_count <<= 1) {
				link_avail = intel_dp_max_data_rate(link_rate,
								    lane_count);

				if (mode_rate <= link_avail) {
					pipe_config->lane_count = lane_count;
					pipe_config->pipe_bpp = bpp;
					pipe_config->port_clock = link_rate;

					return 0;
				}
			}
		}
	}

	return -EINVAL;
}

static int intel_dp_dsc_compute_bpp(struct intel_dp *intel_dp, u8 max_req_bpc)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	int i, num_bpc;
	u8 dsc_bpc[3] = {0};
	u8 dsc_max_bpc;

	/* Max DSC Input BPC for ICL is 10 and for TGL+ is 12 */
	if (DISPLAY_VER(i915) >= 12)
		dsc_max_bpc = min_t(u8, 12, max_req_bpc);
	else
		dsc_max_bpc = min_t(u8, 10, max_req_bpc);

	num_bpc = drm_dp_dsc_sink_supported_input_bpcs(intel_dp->dsc_dpcd,
						       dsc_bpc);
	for (i = 0; i < num_bpc; i++) {
		if (dsc_max_bpc >= dsc_bpc[i])
			return dsc_bpc[i] * 3;
	}

	return 0;
}

static int intel_dp_source_dsc_version_minor(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);

	return DISPLAY_VER(i915) >= 14 ? 2 : 1;
}

static int intel_dp_sink_dsc_version_minor(struct intel_dp *intel_dp)
{
	return (intel_dp->dsc_dpcd[DP_DSC_REV - DP_DSC_SUPPORT] & DP_DSC_MINOR_MASK) >>
		DP_DSC_MINOR_SHIFT;
}

static int intel_dp_dsc_compute_params(struct intel_encoder *encoder,
				       struct intel_crtc_state *crtc_state)
{
	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
	struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
	u8 line_buf_depth;
	int ret;

	/*
	 * RC_MODEL_SIZE is currently a constant across all configurations.
	 *
	 * FIXME: Look into using sink defined DPCD DP_DSC_RC_BUF_BLK_SIZE and
	 * DP_DSC_RC_BUF_SIZE for this.
	 */
	vdsc_cfg->rc_model_size = DSC_RC_MODEL_SIZE_CONST;
	vdsc_cfg->pic_height = crtc_state->hw.adjusted_mode.crtc_vdisplay;

	/*
	 * Slice Height of 8 works for all currently available panels. So start
	 * with that if pic_height is an integral multiple of 8. Eventually add
	 * logic to try multiple slice heights.
	 */
	if (vdsc_cfg->pic_height % 8 == 0)
		vdsc_cfg->slice_height = 8;
	else if (vdsc_cfg->pic_height % 4 == 0)
		vdsc_cfg->slice_height = 4;
	else
		vdsc_cfg->slice_height = 2;

	ret = intel_dsc_compute_params(crtc_state);
	if (ret)
		return ret;

	vdsc_cfg->dsc_version_major =
		(intel_dp->dsc_dpcd[DP_DSC_REV - DP_DSC_SUPPORT] &
		 DP_DSC_MAJOR_MASK) >> DP_DSC_MAJOR_SHIFT;
	vdsc_cfg->dsc_version_minor =
		min(intel_dp_source_dsc_version_minor(intel_dp),
		    intel_dp_sink_dsc_version_minor(intel_dp));

	vdsc_cfg->convert_rgb = intel_dp->dsc_dpcd[DP_DSC_DEC_COLOR_FORMAT_CAP - DP_DSC_SUPPORT] &
		DP_DSC_RGB;

	line_buf_depth = drm_dp_dsc_sink_line_buf_depth(intel_dp->dsc_dpcd);
	if (!line_buf_depth) {
		drm_dbg_kms(&i915->drm,
			    "DSC Sink Line Buffer Depth invalid\n");
		return -EINVAL;
	}

	if (vdsc_cfg->dsc_version_minor == 2)
		vdsc_cfg->line_buf_depth = (line_buf_depth == DSC_1_2_MAX_LINEBUF_DEPTH_BITS) ?
			DSC_1_2_MAX_LINEBUF_DEPTH_VAL : line_buf_depth;
	else
		vdsc_cfg->line_buf_depth = (line_buf_depth > DSC_1_1_MAX_LINEBUF_DEPTH_BITS) ?
			DSC_1_1_MAX_LINEBUF_DEPTH_BITS : line_buf_depth;

	vdsc_cfg->block_pred_enable =
		intel_dp->dsc_dpcd[DP_DSC_BLK_PREDICTION_SUPPORT - DP_DSC_SUPPORT] &
		DP_DSC_BLK_PREDICTION_IS_SUPPORTED;

	return drm_dsc_compute_rc_parameters(vdsc_cfg);
}

static int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
				       struct intel_crtc_state *pipe_config,
				       struct drm_connector_state *conn_state,
				       struct link_config_limits *limits)
{
	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
	struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
	const struct drm_display_mode *adjusted_mode =
		&pipe_config->hw.adjusted_mode;
	int pipe_bpp;
	int ret;

	pipe_config->fec_enable = !intel_dp_is_edp(intel_dp) &&
		intel_dp_supports_fec(intel_dp, pipe_config);

	if (!intel_dp_supports_dsc(intel_dp, pipe_config))
		return -EINVAL;

	pipe_bpp = intel_dp_dsc_compute_bpp(intel_dp, conn_state->max_requested_bpc);

	if (intel_dp->force_dsc_bpc) {
		pipe_bpp = intel_dp->force_dsc_bpc * 3;
		drm_dbg_kms(&dev_priv->drm, "Input DSC BPP forced to %d", pipe_bpp);
	}

	/* Min Input BPC for ICL+ is 8 */
	if (pipe_bpp < 8 * 3) {
		drm_dbg_kms(&dev_priv->drm,
			    "No DSC support for less than 8bpc\n");
		return -EINVAL;
	}

	/*
	 * For now enable DSC for max bpp, max link rate, max lane count.
	 * Optimize this later for the minimum possible link rate/lane count
	 * with DSC enabled for the requested mode.
	 */
	pipe_config->pipe_bpp = pipe_bpp;
	pipe_config->port_clock = limits->max_rate;
	pipe_config->lane_count = limits->max_lane_count;

	if (intel_dp_is_edp(intel_dp)) {
		pipe_config->dsc.compressed_bpp =
			min_t(u16, drm_edp_dsc_sink_output_bpp(intel_dp->dsc_dpcd) >> 4,
			      pipe_config->pipe_bpp);
		pipe_config->dsc.slice_count =
			drm_dp_dsc_sink_max_slice_count(intel_dp->dsc_dpcd,
							true);
	} else {
		u16 dsc_max_output_bpp;
		u8 dsc_dp_slice_count;

		dsc_max_output_bpp =
			intel_dp_dsc_get_output_bpp(dev_priv,
						    pipe_config->port_clock,
						    pipe_config->lane_count,
						    adjusted_mode->crtc_clock,
						    adjusted_mode->crtc_hdisplay,
						    pipe_config->bigjoiner_pipes,
						    pipe_bpp);
		dsc_dp_slice_count =
			intel_dp_dsc_get_slice_count(intel_dp,
						     adjusted_mode->crtc_clock,
						     adjusted_mode->crtc_hdisplay,
						     pipe_config->bigjoiner_pipes);
		if (!dsc_max_output_bpp || !dsc_dp_slice_count) {
			drm_dbg_kms(&dev_priv->drm,
				    "Compressed BPP/Slice Count not supported\n");
			return -EINVAL;
		}
		pipe_config->dsc.compressed_bpp = min_t(u16,
							       dsc_max_output_bpp >> 4,
							       pipe_config->pipe_bpp);
		pipe_config->dsc.slice_count = dsc_dp_slice_count;
	}

	/*
	 * VDSC engine operates at 1 Pixel per clock, so if peak pixel rate
	 * is greater than the maximum Cdclock and if slice count is even
	 * then we need to use 2 VDSC instances.
	 */
	if (adjusted_mode->crtc_clock > dev_priv->display.cdclk.max_cdclk_freq ||
	    pipe_config->bigjoiner_pipes) {
		if (pipe_config->dsc.slice_count < 2) {
			drm_dbg_kms(&dev_priv->drm,
				    "Cannot split stream to use 2 VDSC instances\n");
			return -EINVAL;
		}

		pipe_config->dsc.dsc_split = true;
	}

	ret = intel_dp_dsc_compute_params(&dig_port->base, pipe_config);
	if (ret < 0) {
		drm_dbg_kms(&dev_priv->drm,
			    "Cannot compute valid DSC parameters for Input Bpp = %d "
			    "Compressed BPP = %d\n",
			    pipe_config->pipe_bpp,
			    pipe_config->dsc.compressed_bpp);
		return ret;
	}

	pipe_config->dsc.compression_enable = true;
	drm_dbg_kms(&dev_priv->drm, "DP DSC computed with Input Bpp = %d "
		    "Compressed Bpp = %d Slice Count = %d\n",
		    pipe_config->pipe_bpp,
		    pipe_config->dsc.compressed_bpp,
		    pipe_config->dsc.slice_count);

	return 0;
}

static int
intel_dp_compute_link_config(struct intel_encoder *encoder,
			     struct intel_crtc_state *pipe_config,
			     struct drm_connector_state *conn_state,
			     bool respect_downstream_limits)
{
	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
	struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
	const struct drm_display_mode *adjusted_mode =
		&pipe_config->hw.adjusted_mode;
	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
	struct link_config_limits limits;
	bool joiner_needs_dsc = false;
	int ret;

	limits.min_rate = intel_dp_common_rate(intel_dp, 0);
	limits.max_rate = intel_dp_max_link_rate(intel_dp);

	limits.min_lane_count = 1;
	limits.max_lane_count = intel_dp_max_lane_count(intel_dp);

	limits.min_bpp = intel_dp_min_bpp(pipe_config->output_format);
	limits.max_bpp = intel_dp_max_bpp(intel_dp, pipe_config, respect_downstream_limits);

	if (intel_dp->use_max_params) {
		/*
		 * Use the maximum clock and number of lanes the eDP panel
		 * advertizes being capable of in case the initial fast
		 * optimal params failed us. The panels are generally
		 * designed to support only a single clock and lane
		 * configuration, and typically on older panels these
		 * values correspond to the native resolution of the panel.
		 */
		limits.min_lane_count = limits.max_lane_count;
		limits.min_rate = limits.max_rate;
	}

	intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits);

	drm_dbg_kms(&i915->drm, "DP link computation with max lane count %i "
		    "max rate %d max bpp %d pixel clock %iKHz\n",
		    limits.max_lane_count, limits.max_rate,
		    limits.max_bpp, adjusted_mode->crtc_clock);

	if (intel_dp_need_bigjoiner(intel_dp, adjusted_mode->crtc_hdisplay,
				    adjusted_mode->crtc_clock))
		pipe_config->bigjoiner_pipes = GENMASK(crtc->pipe + 1, crtc->pipe);

	/*
	 * Pipe joiner needs compression up to display 12 due to bandwidth
	 * limitation. DG2 onwards pipe joiner can be enabled without
	 * compression.
	 */
	joiner_needs_dsc = DISPLAY_VER(i915) < 13 && pipe_config->bigjoiner_pipes;

	/*
	 * Optimize for slow and wide for everything, because there are some
	 * eDP 1.3 and 1.4 panels don't work well with fast and narrow.
	 */
	ret = intel_dp_compute_link_config_wide(intel_dp, pipe_config, conn_state, &limits);

	if (ret || joiner_needs_dsc || intel_dp->force_dsc_en) {
		drm_dbg_kms(&i915->drm, "Try DSC (fallback=%s, joiner=%s, force=%s)\n",
			    str_yes_no(ret), str_yes_no(joiner_needs_dsc),
			    str_yes_no(intel_dp->force_dsc_en));
		ret = intel_dp_dsc_compute_config(intel_dp, pipe_config,
						  conn_state, &limits);
		if (ret < 0)
			return ret;
	}

	if (pipe_config->dsc.compression_enable) {
		drm_dbg_kms(&i915->drm,
			    "DP lane count %d clock %d Input bpp %d Compressed bpp %d\n",
			    pipe_config->lane_count, pipe_config->port_clock,
			    pipe_config->pipe_bpp,
			    pipe_config->dsc.compressed_bpp);

		drm_dbg_kms(&i915->drm,
			    "DP link rate required %i available %i\n",
			    intel_dp_link_required(adjusted_mode->crtc_clock,
						   pipe_config->dsc.compressed_bpp),
			    intel_dp_max_data_rate(pipe_config->port_clock,
						   pipe_config->lane_count));
	} else {
		drm_dbg_kms(&i915->drm, "DP lane count %d clock %d bpp %d\n",
			    pipe_config->lane_count, pipe_config->port_clock,
			    pipe_config->pipe_bpp);

		drm_dbg_kms(&i915->drm,
			    "DP link rate required %i available %i\n",
			    intel_dp_link_required(adjusted_mode->crtc_clock,
						   pipe_config->pipe_bpp),
			    intel_dp_max_data_rate(pipe_config->port_clock,
						   pipe_config->lane_count));
	}
	return 0;
}

bool intel_dp_limited_color_range(const struct intel_crtc_state *crtc_state,
				  const struct drm_connector_state *conn_state)
{
	const struct intel_digital_connector_state *intel_conn_state =
		to_intel_digital_connector_state(conn_state);
	const struct drm_display_mode *adjusted_mode =
		&crtc_state->hw.adjusted_mode;

	/*
	 * Our YCbCr output is always limited range.
	 * crtc_state->limited_color_range only applies to RGB,
	 * and it must never be set for YCbCr or we risk setting
	 * some conflicting bits in PIPECONF which will mess up
	 * the colors on the monitor.
	 */
	if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB)
		return false;

	if (intel_conn_state->broadcast_rgb == INTEL_BROADCAST_RGB_AUTO) {
		/*
		 * See:
		 * CEA-861-E - 5.1 Default Encoding Parameters
		 * VESA DisplayPort Ver.1.2a - 5.1.1.1 Video Colorimetry
		 */
		return crtc_state->pipe_bpp != 18 &&
			drm_default_rgb_quant_range(adjusted_mode) ==
			HDMI_QUANTIZATION_RANGE_LIMITED;
	} else {
		return intel_conn_state->broadcast_rgb ==
			INTEL_BROADCAST_RGB_LIMITED;
	}
}

static bool intel_dp_port_has_audio(struct drm_i915_private *dev_priv,
				    enum port port)
{
	if (IS_G4X(dev_priv))
		return false;
	if (DISPLAY_VER(dev_priv) < 12 && port == PORT_A)
		return false;

	return true;
}

static void intel_dp_compute_vsc_colorimetry(const struct intel_crtc_state *crtc_state,
					     const struct drm_connector_state *conn_state,
					     struct drm_dp_vsc_sdp *vsc)
{
	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);

	/*
	 * Prepare VSC Header for SU as per DP 1.4 spec, Table 2-118
	 * VSC SDP supporting 3D stereo, PSR2, and Pixel Encoding/
	 * Colorimetry Format indication.
	 */
	vsc->revision = 0x5;
	vsc->length = 0x13;

	/* DP 1.4a spec, Table 2-120 */
	switch (crtc_state->output_format) {
	case INTEL_OUTPUT_FORMAT_YCBCR444:
		vsc->pixelformat = DP_PIXELFORMAT_YUV444;
		break;
	case INTEL_OUTPUT_FORMAT_YCBCR420:
		vsc->pixelformat = DP_PIXELFORMAT_YUV420;
		break;
	case INTEL_OUTPUT_FORMAT_RGB:
	default:
		vsc->pixelformat = DP_PIXELFORMAT_RGB;
	}

	switch (conn_state->colorspace) {
	case DRM_MODE_COLORIMETRY_BT709_YCC:
		vsc->colorimetry = DP_COLORIMETRY_BT709_YCC;
		break;
	case DRM_MODE_COLORIMETRY_XVYCC_601:
		vsc->colorimetry = DP_COLORIMETRY_XVYCC_601;
		break;
	case DRM_MODE_COLORIMETRY_XVYCC_709:
		vsc->colorimetry = DP_COLORIMETRY_XVYCC_709;
		break;
	case DRM_MODE_COLORIMETRY_SYCC_601:
		vsc->colorimetry = DP_COLORIMETRY_SYCC_601;
		break;
	case DRM_MODE_COLORIMETRY_OPYCC_601:
		vsc->colorimetry = DP_COLORIMETRY_OPYCC_601;
		break;
	case DRM_MODE_COLORIMETRY_BT2020_CYCC:
		vsc->colorimetry = DP_COLORIMETRY_BT2020_CYCC;
		break;
	case DRM_MODE_COLORIMETRY_BT2020_RGB:
		vsc->colorimetry = DP_COLORIMETRY_BT2020_RGB;
		break;
	case DRM_MODE_COLORIMETRY_BT2020_YCC:
		vsc->colorimetry = DP_COLORIMETRY_BT2020_YCC;
		break;
	case DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65:
	case DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER:
		vsc->colorimetry = DP_COLORIMETRY_DCI_P3_RGB;
		break;
	default:
		/*
		 * RGB->YCBCR color conversion uses the BT.709
		 * color space.
		 */
		if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
			vsc->colorimetry = DP_COLORIMETRY_BT709_YCC;
		else
			vsc->colorimetry = DP_COLORIMETRY_DEFAULT;
		break;
	}

	vsc->bpc = crtc_state->pipe_bpp / 3;

	/* only RGB pixelformat supports 6 bpc */
	drm_WARN_ON(&dev_priv->drm,
		    vsc->bpc == 6 && vsc->pixelformat != DP_PIXELFORMAT_RGB);

	/* all YCbCr are always limited range */
	vsc->dynamic_range = DP_DYNAMIC_RANGE_CTA;
	vsc->content_type = DP_CONTENT_TYPE_NOT_DEFINED;
}

static void intel_dp_compute_vsc_sdp(struct intel_dp *intel_dp,
				     struct intel_crtc_state *crtc_state,
				     const struct drm_connector_state *conn_state)
{
	struct drm_dp_vsc_sdp *vsc = &crtc_state->infoframes.vsc;

	/* When a crtc state has PSR, VSC SDP will be handled by PSR routine */
	if (crtc_state->has_psr)
		return;

	if (!intel_dp_needs_vsc_sdp(crtc_state, conn_state))
		return;

	crtc_state->infoframes.enable |= intel_hdmi_infoframe_enable(DP_SDP_VSC);
	vsc->sdp_type = DP_SDP_VSC;
	intel_dp_compute_vsc_colorimetry(crtc_state, conn_state,
					 &crtc_state->infoframes.vsc);
}

void intel_dp_compute_psr_vsc_sdp(struct intel_dp *intel_dp,
				  const struct intel_crtc_state *crtc_state,
				  const struct drm_connector_state *conn_state,
				  struct drm_dp_vsc_sdp *vsc)
{
	vsc->sdp_type = DP_SDP_VSC;

	if (crtc_state->has_psr2) {
		if (intel_dp->psr.colorimetry_support &&
		    intel_dp_needs_vsc_sdp(crtc_state, conn_state)) {
			/* [PSR2, +Colorimetry] */
			intel_dp_compute_vsc_colorimetry(crtc_state, conn_state,
							 vsc);
		} else {
			/*
			 * [PSR2, -Colorimetry]
			 * Prepare VSC Header for SU as per eDP 1.4 spec, Table 6-11
			 * 3D stereo + PSR/PSR2 + Y-coordinate.
			 */
			vsc->revision = 0x4;
			vsc->length = 0xe;
		}
	} else {
		/*
		 * [PSR1]
		 * Prepare VSC Header for SU as per DP 1.4 spec, Table 2-118
		 * VSC SDP supporting 3D stereo + PSR (applies to eDP v1.3 or
		 * higher).
		 */
		vsc->revision = 0x2;
		vsc->length = 0x8;
	}
}

static void
intel_dp_compute_hdr_metadata_infoframe_sdp(struct intel_dp *intel_dp,
					    struct intel_crtc_state *crtc_state,
					    const struct drm_connector_state *conn_state)
{
	int ret;
	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
	struct hdmi_drm_infoframe *drm_infoframe = &crtc_state->infoframes.drm.drm;

	if (!conn_state->hdr_output_metadata)
		return;

	ret = drm_hdmi_infoframe_set_hdr_metadata(drm_infoframe, conn_state);

	if (ret) {
		drm_dbg_kms(&dev_priv->drm, "couldn't set HDR metadata in infoframe\n");
		return;
	}

	crtc_state->infoframes.enable |=
		intel_hdmi_infoframe_enable(HDMI_PACKET_TYPE_GAMUT_METADATA);
}

static bool cpu_transcoder_has_drrs(struct drm_i915_private *i915,
				    enum transcoder cpu_transcoder)
{
	if (HAS_DOUBLE_BUFFERED_M_N(i915))
		return true;

	return intel_cpu_transcoder_has_m2_n2(i915, cpu_transcoder);
}

static bool can_enable_drrs(struct intel_connector *connector,
			    const struct intel_crtc_state *pipe_config,
			    const struct drm_display_mode *downclock_mode)
{
	struct drm_i915_private *i915 = to_i915(connector->base.dev);

	if (pipe_config->vrr.enable)
		return false;

	/*
	 * DRRS and PSR can't be enable together, so giving preference to PSR
	 * as it allows more power-savings by complete shutting down display,
	 * so to guarantee this, intel_drrs_compute_config() must be called
	 * after intel_psr_compute_config().
	 */
	if (pipe_config->has_psr)
		return false;

	/* FIXME missing FDI M2/N2 etc. */
	if (pipe_config->has_pch_encoder)
		return false;

	if (!cpu_transcoder_has_drrs(i915, pipe_config->cpu_transcoder))
		return false;

	return downclock_mode &&
		intel_panel_drrs_type(connector) == DRRS_TYPE_SEAMLESS;
}

static void
intel_dp_drrs_compute_config(struct intel_connector *connector,
			     struct intel_crtc_state *pipe_config,
			     int output_bpp)
{
	struct drm_i915_private *i915 = to_i915(connector->base.dev);
	const struct drm_display_mode *downclock_mode =
		intel_panel_downclock_mode(connector, &pipe_config->hw.adjusted_mode);
	int pixel_clock;

	if (has_seamless_m_n(connector))
		pipe_config->seamless_m_n = true;

	if (!can_enable_drrs(connector, pipe_config, downclock_mode)) {
		if (intel_cpu_transcoder_has_m2_n2(i915, pipe_config->cpu_transcoder))
			intel_zero_m_n(&pipe_config->dp_m2_n2);
		return;
	}

	if (IS_IRONLAKE(i915) || IS_SANDYBRIDGE(i915) || IS_IVYBRIDGE(i915))
		pipe_config->msa_timing_delay = connector->panel.vbt.edp.drrs_msa_timing_delay;

	pipe_config->has_drrs = true;

	pixel_clock = downclock_mode->clock;
	if (pipe_config->splitter.enable)
		pixel_clock /= pipe_config->splitter.link_count;

	intel_link_compute_m_n(output_bpp, pipe_config->lane_count, pixel_clock,
			       pipe_config->port_clock, &pipe_config->dp_m2_n2,
			       pipe_config->fec_enable);

	/* FIXME: abstract this better */
	if (pipe_config->splitter.enable)
		pipe_config->dp_m2_n2.data_m *= pipe_config->splitter.link_count;
}

static bool intel_dp_has_audio(struct intel_encoder *encoder,
			       const struct intel_crtc_state *crtc_state,
			       const struct drm_connector_state *conn_state)
{
	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
	const struct intel_digital_connector_state *intel_conn_state =
		to_intel_digital_connector_state(conn_state);

	if (!intel_dp_port_has_audio(i915, encoder->port))
		return false;

	if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO)
		return intel_dp->has_audio;
	else
		return intel_conn_state->force_audio == HDMI_AUDIO_ON;
}

static int
intel_dp_compute_output_format(struct intel_encoder *encoder,
			       struct intel_crtc_state *crtc_state,
			       struct drm_connector_state *conn_state,
			       bool respect_downstream_limits)
{
	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
	struct intel_connector *connector = intel_dp->attached_connector;
	const struct drm_display_info *info = &connector->base.display_info;
	const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
	bool ycbcr_420_only;
	int ret;

	ycbcr_420_only = drm_mode_is_420_only(info, adjusted_mode);

	crtc_state->output_format = intel_dp_output_format(connector, ycbcr_420_only);

	if (ycbcr_420_only && !intel_dp_is_ycbcr420(intel_dp, crtc_state)) {
		drm_dbg_kms(&i915->drm,
			    "YCbCr 4:2:0 mode but YCbCr 4:2:0 output not possible. Falling back to RGB.\n");
		crtc_state->output_format = INTEL_OUTPUT_FORMAT_RGB;
	}

	ret = intel_dp_compute_link_config(encoder, crtc_state, conn_state,
					   respect_downstream_limits);
	if (ret) {
		if (intel_dp_is_ycbcr420(intel_dp, crtc_state) ||
		    !connector->base.ycbcr_420_allowed ||
		    !drm_mode_is_420_also(info, adjusted_mode))
			return ret;

		crtc_state->output_format = intel_dp_output_format(connector, true);
		ret = intel_dp_compute_link_config(encoder, crtc_state, conn_state,
						   respect_downstream_limits);
	}

	return ret;
}

int
intel_dp_compute_config(struct intel_encoder *encoder,
			struct intel_crtc_state *pipe_config,
			struct drm_connector_state *conn_state)
{
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
	struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
	const struct drm_display_mode *fixed_mode;
	struct intel_connector *connector = intel_dp->attached_connector;
	int ret = 0, output_bpp;

	if (HAS_PCH_SPLIT(dev_priv) && !HAS_DDI(dev_priv) && encoder->port != PORT_A)
		pipe_config->has_pch_encoder = true;

	pipe_config->has_audio = intel_dp_has_audio(encoder, pipe_config, conn_state);

	fixed_mode = intel_panel_fixed_mode(connector, adjusted_mode);
	if (intel_dp_is_edp(intel_dp) && fixed_mode) {
		ret = intel_panel_compute_config(connector, adjusted_mode);
		if (ret)
			return ret;
	}

	if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
		return -EINVAL;

	if (HAS_GMCH(dev_priv) &&
	    adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
		return -EINVAL;

	if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
		return -EINVAL;

	if (intel_dp_hdisplay_bad(dev_priv, adjusted_mode->crtc_hdisplay))
		return -EINVAL;

	/*
	 * Try to respect downstream TMDS clock limits first, if
	 * that fails assume the user might know something we don't.
	 */
	ret = intel_dp_compute_output_format(encoder, pipe_config, conn_state, true);
	if (ret)
		ret = intel_dp_compute_output_format(encoder, pipe_config, conn_state, false);
	if (ret)
		return ret;

	if ((intel_dp_is_edp(intel_dp) && fixed_mode) ||
	    pipe_config->output_format == INTEL_OUTPUT_FORMAT_YCBCR420) {
		ret = intel_panel_fitting(pipe_config, conn_state);
		if (ret)
			return ret;
	}

	pipe_config->limited_color_range =
		intel_dp_limited_color_range(pipe_config, conn_state);

	if (pipe_config->dsc.compression_enable)
		output_bpp = pipe_config->dsc.compressed_bpp;
	else
		output_bpp = intel_dp_output_bpp(pipe_config->output_format,
						 pipe_config->pipe_bpp);

	if (intel_dp->mso_link_count) {
		int n = intel_dp->mso_link_count;
		int overlap = intel_dp->mso_pixel_overlap;

		pipe_config->splitter.enable = true;
		pipe_config->splitter.link_count = n;
		pipe_config->splitter.pixel_overlap = overlap;

		drm_dbg_kms(&dev_priv->drm, "MSO link count %d, pixel overlap %d\n",
			    n, overlap);

		adjusted_mode->crtc_hdisplay = adjusted_mode->crtc_hdisplay / n + overlap;
		adjusted_mode->crtc_hblank_start = adjusted_mode->crtc_hblank_start / n + overlap;
		adjusted_mode->crtc_hblank_end = adjusted_mode->crtc_hblank_end / n + overlap;
		adjusted_mode->crtc_hsync_start = adjusted_mode->crtc_hsync_start / n + overlap;
		adjusted_mode->crtc_hsync_end = adjusted_mode->crtc_hsync_end / n + overlap;
		adjusted_mode->crtc_htotal = adjusted_mode->crtc_htotal / n + overlap;
		adjusted_mode->crtc_clock /= n;
	}

	intel_link_compute_m_n(output_bpp,
			       pipe_config->lane_count,
			       adjusted_mode->crtc_clock,
			       pipe_config->port_clock,
			       &pipe_config->dp_m_n,
			       pipe_config->fec_enable);

	/* FIXME: abstract this better */
	if (pipe_config->splitter.enable)
		pipe_config->dp_m_n.data_m *= pipe_config->splitter.link_count;

	if (!HAS_DDI(dev_priv))
		g4x_dp_set_clock(encoder, pipe_config);

	intel_vrr_compute_config(pipe_config, conn_state);
	intel_psr_compute_config(intel_dp, pipe_config, conn_state);
	intel_dp_drrs_compute_config(connector, pipe_config, output_bpp);
	intel_dp_compute_vsc_sdp(intel_dp, pipe_config, conn_state);
	intel_dp_compute_hdr_metadata_infoframe_sdp(intel_dp, pipe_config, conn_state);

	return 0;
}

void intel_dp_set_link_params(struct intel_dp *intel_dp,
			      int link_rate, int lane_count)
{
	memset(intel_dp->train_set, 0, sizeof(intel_dp->train_set));
	intel_dp->link_trained = false;
	intel_dp->link_rate = link_rate;
	intel_dp->lane_count = lane_count;
}

static void intel_dp_reset_max_link_params(struct intel_dp *intel_dp)
{
	intel_dp->max_link_lane_count = intel_dp_max_common_lane_count(intel_dp);
	intel_dp->max_link_rate = intel_dp_max_common_rate(intel_dp);
}

/* Enable backlight PWM and backlight PP control. */
void intel_edp_backlight_on(const struct intel_crtc_state *crtc_state,
			    const struct drm_connector_state *conn_state)
{
	struct intel_dp *intel_dp = enc_to_intel_dp(to_intel_encoder(conn_state->best_encoder));
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);

	if (!intel_dp_is_edp(intel_dp))
		return;

	drm_dbg_kms(&i915->drm, "\n");

	intel_backlight_enable(crtc_state, conn_state);
	intel_pps_backlight_on(intel_dp);
}

/* Disable backlight PP control and backlight PWM. */
void intel_edp_backlight_off(const struct drm_connector_state *old_conn_state)
{
	struct intel_dp *intel_dp = enc_to_intel_dp(to_intel_encoder(old_conn_state->best_encoder));
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);

	if (!intel_dp_is_edp(intel_dp))
		return;

	drm_dbg_kms(&i915->drm, "\n");

	intel_pps_backlight_off(intel_dp);
	intel_backlight_disable(old_conn_state);
}

static bool downstream_hpd_needs_d0(struct intel_dp *intel_dp)
{
	/*
	 * DPCD 1.2+ should support BRANCH_DEVICE_CTRL, and thus
	 * be capable of signalling downstream hpd with a long pulse.
	 * Whether or not that means D3 is safe to use is not clear,
	 * but let's assume so until proven otherwise.
	 *
	 * FIXME should really check all downstream ports...
	 */
	return intel_dp->dpcd[DP_DPCD_REV] == 0x11 &&
		drm_dp_is_branch(intel_dp->dpcd) &&
		intel_dp->downstream_ports[0] & DP_DS_PORT_HPD;
}

void intel_dp_sink_set_decompression_state(struct intel_dp *intel_dp,
					   const struct intel_crtc_state *crtc_state,
					   bool enable)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	int ret;

	if (!crtc_state->dsc.compression_enable)
		return;

	ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_DSC_ENABLE,
				 enable ? DP_DECOMPRESSION_EN : 0);
	if (ret < 0)
		drm_dbg_kms(&i915->drm,
			    "Failed to %s sink decompression state\n",
			    str_enable_disable(enable));
}

static void
intel_edp_init_source_oui(struct intel_dp *intel_dp, bool careful)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	u8 oui[] = { 0x00, 0xaa, 0x01 };
	u8 buf[3] = { 0 };

	/*
	 * During driver init, we want to be careful and avoid changing the source OUI if it's
	 * already set to what we want, so as to avoid clearing any state by accident
	 */
	if (careful) {
		if (drm_dp_dpcd_read(&intel_dp->aux, DP_SOURCE_OUI, buf, sizeof(buf)) < 0)
			drm_err(&i915->drm, "Failed to read source OUI\n");

		if (memcmp(oui, buf, sizeof(oui)) == 0)
			return;
	}

	if (drm_dp_dpcd_write(&intel_dp->aux, DP_SOURCE_OUI, oui, sizeof(oui)) < 0)
		drm_err(&i915->drm, "Failed to write source OUI\n");

	intel_dp->last_oui_write = jiffies;
}

void intel_dp_wait_source_oui(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);

	drm_dbg_kms(&i915->drm, "Performing OUI wait\n");
	wait_remaining_ms_from_jiffies(intel_dp->last_oui_write, 30);
}

/* If the device supports it, try to set the power state appropriately */
void intel_dp_set_power(struct intel_dp *intel_dp, u8 mode)
{
	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
	int ret, i;

	/* Should have a valid DPCD by this point */
	if (intel_dp->dpcd[DP_DPCD_REV] < 0x11)
		return;

	if (mode != DP_SET_POWER_D0) {
		if (downstream_hpd_needs_d0(intel_dp))
			return;

		ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER, mode);
	} else {
		struct intel_lspcon *lspcon = dp_to_lspcon(intel_dp);

		lspcon_resume(dp_to_dig_port(intel_dp));

		/* Write the source OUI as early as possible */
		if (intel_dp_is_edp(intel_dp))
			intel_edp_init_source_oui(intel_dp, false);

		/*
		 * When turning on, we need to retry for 1ms to give the sink
		 * time to wake up.
		 */
		for (i = 0; i < 3; i++) {
			ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER, mode);
			if (ret == 1)
				break;
			msleep(1);
		}

		if (ret == 1 && lspcon->active)
			lspcon_wait_pcon_mode(lspcon);
	}

	if (ret != 1)
		drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s] Set power to %s failed\n",
			    encoder->base.base.id, encoder->base.name,
			    mode == DP_SET_POWER_D0 ? "D0" : "D3");
}

static bool
intel_dp_get_dpcd(struct intel_dp *intel_dp);

/**
 * intel_dp_sync_state - sync the encoder state during init/resume
 * @encoder: intel encoder to sync
 * @crtc_state: state for the CRTC connected to the encoder
 *
 * Sync any state stored in the encoder wrt. HW state during driver init
 * and system resume.
 */
void intel_dp_sync_state(struct intel_encoder *encoder,
			 const struct intel_crtc_state *crtc_state)
{
	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);

	if (!crtc_state)
		return;

	/*
	 * Don't clobber DPCD if it's been already read out during output
	 * setup (eDP) or detect.
	 */
	if (intel_dp->dpcd[DP_DPCD_REV] == 0)
		intel_dp_get_dpcd(intel_dp);

	intel_dp_reset_max_link_params(intel_dp);
}

bool intel_dp_initial_fastset_check(struct intel_encoder *encoder,
				    struct intel_crtc_state *crtc_state)
{
	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
	bool fastset = true;

	/*
	 * If BIOS has set an unsupported or non-standard link rate for some
	 * reason force an encoder recompute and full modeset.
	 */
	if (intel_dp_rate_index(intel_dp->source_rates, intel_dp->num_source_rates,
				crtc_state->port_clock) < 0) {
		drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s] Forcing full modeset due to unsupported link rate\n",
			    encoder->base.base.id, encoder->base.name);
		crtc_state->uapi.connectors_changed = true;
		fastset = false;
	}

	/*
	 * FIXME hack to force full modeset when DSC is being used.
	 *
	 * As long as we do not have full state readout and config comparison
	 * of crtc_state->dsc, we have no way to ensure reliable fastset.
	 * Remove once we have readout for DSC.
	 */
	if (crtc_state->dsc.compression_enable) {
		drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s] Forcing full modeset due to DSC being enabled\n",
			    encoder->base.base.id, encoder->base.name);
		crtc_state->uapi.mode_changed = true;
		fastset = false;
	}

	if (CAN_PSR(intel_dp)) {
		drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s] Forcing full modeset to compute PSR state\n",
			    encoder->base.base.id, encoder->base.name);
		crtc_state->uapi.mode_changed = true;
		fastset = false;
	}

	return fastset;
}

static void intel_dp_get_pcon_dsc_cap(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);

	/* Clear the cached register set to avoid using stale values */

	memset(intel_dp->pcon_dsc_dpcd, 0, sizeof(intel_dp->pcon_dsc_dpcd));

	if (drm_dp_dpcd_read(&intel_dp->aux, DP_PCON_DSC_ENCODER,
			     intel_dp->pcon_dsc_dpcd,
			     sizeof(intel_dp->pcon_dsc_dpcd)) < 0)
		drm_err(&i915->drm, "Failed to read DPCD register 0x%x\n",
			DP_PCON_DSC_ENCODER);

	drm_dbg_kms(&i915->drm, "PCON ENCODER DSC DPCD: %*ph\n",
		    (int)sizeof(intel_dp->pcon_dsc_dpcd), intel_dp->pcon_dsc_dpcd);
}

static int intel_dp_pcon_get_frl_mask(u8 frl_bw_mask)
{
	int bw_gbps[] = {9, 18, 24, 32, 40, 48};
	int i;

	for (i = ARRAY_SIZE(bw_gbps) - 1; i >= 0; i--) {
		if (frl_bw_mask & (1 << i))
			return bw_gbps[i];
	}
	return 0;
}

static int intel_dp_pcon_set_frl_mask(int max_frl)
{
	switch (max_frl) {
	case 48:
		return DP_PCON_FRL_BW_MASK_48GBPS;
	case 40:
		return DP_PCON_FRL_BW_MASK_40GBPS;
	case 32:
		return DP_PCON_FRL_BW_MASK_32GBPS;
	case 24:
		return DP_PCON_FRL_BW_MASK_24GBPS;
	case 18:
		return DP_PCON_FRL_BW_MASK_18GBPS;
	case 9:
		return DP_PCON_FRL_BW_MASK_9GBPS;
	}

	return 0;
}

static int intel_dp_hdmi_sink_max_frl(struct intel_dp *intel_dp)
{
	struct intel_connector *intel_connector = intel_dp->attached_connector;
	struct drm_connector *connector = &intel_connector->base;
	int max_frl_rate;
	int max_lanes, rate_per_lane;
	int max_dsc_lanes, dsc_rate_per_lane;

	max_lanes = connector->display_info.hdmi.max_lanes;
	rate_per_lane = connector->display_info.hdmi.max_frl_rate_per_lane;
	max_frl_rate = max_lanes * rate_per_lane;

	if (connector->display_info.hdmi.dsc_cap.v_1p2) {
		max_dsc_lanes = connector->display_info.hdmi.dsc_cap.max_lanes;
		dsc_rate_per_lane = connector->display_info.hdmi.dsc_cap.max_frl_rate_per_lane;
		if (max_dsc_lanes && dsc_rate_per_lane)
			max_frl_rate = min(max_frl_rate, max_dsc_lanes * dsc_rate_per_lane);
	}

	return max_frl_rate;
}

static bool
intel_dp_pcon_is_frl_trained(struct intel_dp *intel_dp,
			     u8 max_frl_bw_mask, u8 *frl_trained_mask)
{
	if (drm_dp_pcon_hdmi_link_active(&intel_dp->aux) &&
	    drm_dp_pcon_hdmi_link_mode(&intel_dp->aux, frl_trained_mask) == DP_PCON_HDMI_MODE_FRL &&
	    *frl_trained_mask >= max_frl_bw_mask)
		return true;

	return false;
}

static int intel_dp_pcon_start_frl_training(struct intel_dp *intel_dp)
{
#define TIMEOUT_FRL_READY_MS 500
#define TIMEOUT_HDMI_LINK_ACTIVE_MS 1000

	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	int max_frl_bw, max_pcon_frl_bw, max_edid_frl_bw, ret;
	u8 max_frl_bw_mask = 0, frl_trained_mask;
	bool is_active;

	max_pcon_frl_bw = intel_dp->dfp.pcon_max_frl_bw;
	drm_dbg(&i915->drm, "PCON max rate = %d Gbps\n", max_pcon_frl_bw);

	max_edid_frl_bw = intel_dp_hdmi_sink_max_frl(intel_dp);
	drm_dbg(&i915->drm, "Sink max rate from EDID = %d Gbps\n", max_edid_frl_bw);

	max_frl_bw = min(max_edid_frl_bw, max_pcon_frl_bw);

	if (max_frl_bw <= 0)
		return -EINVAL;

	max_frl_bw_mask = intel_dp_pcon_set_frl_mask(max_frl_bw);
	drm_dbg(&i915->drm, "MAX_FRL_BW_MASK = %u\n", max_frl_bw_mask);

	if (intel_dp_pcon_is_frl_trained(intel_dp, max_frl_bw_mask, &frl_trained_mask))
		goto frl_trained;

	ret = drm_dp_pcon_frl_prepare(&intel_dp->aux, false);
	if (ret < 0)
		return ret;
	/* Wait for PCON to be FRL Ready */
	wait_for(is_active = drm_dp_pcon_is_frl_ready(&intel_dp->aux) == true, TIMEOUT_FRL_READY_MS);

	if (!is_active)
		return -ETIMEDOUT;

	ret = drm_dp_pcon_frl_configure_1(&intel_dp->aux, max_frl_bw,
					  DP_PCON_ENABLE_SEQUENTIAL_LINK);
	if (ret < 0)
		return ret;
	ret = drm_dp_pcon_frl_configure_2(&intel_dp->aux, max_frl_bw_mask,
					  DP_PCON_FRL_LINK_TRAIN_NORMAL);
	if (ret < 0)
		return ret;
	ret = drm_dp_pcon_frl_enable(&intel_dp->aux);
	if (ret < 0)
		return ret;
	/*
	 * Wait for FRL to be completed
	 * Check if the HDMI Link is up and active.
	 */
	wait_for(is_active =
		 intel_dp_pcon_is_frl_trained(intel_dp, max_frl_bw_mask, &frl_trained_mask),
		 TIMEOUT_HDMI_LINK_ACTIVE_MS);

	if (!is_active)
		return -ETIMEDOUT;

frl_trained:
	drm_dbg(&i915->drm, "FRL_TRAINED_MASK = %u\n", frl_trained_mask);
	intel_dp->frl.trained_rate_gbps = intel_dp_pcon_get_frl_mask(frl_trained_mask);
	intel_dp->frl.is_trained = true;
	drm_dbg(&i915->drm, "FRL trained with : %d Gbps\n", intel_dp->frl.trained_rate_gbps);

	return 0;
}

static bool intel_dp_is_hdmi_2_1_sink(struct intel_dp *intel_dp)
{
	if (drm_dp_is_branch(intel_dp->dpcd) &&
	    intel_dp->has_hdmi_sink &&
	    intel_dp_hdmi_sink_max_frl(intel_dp) > 0)
		return true;

	return false;
}

static
int intel_dp_pcon_set_tmds_mode(struct intel_dp *intel_dp)
{
	int ret;
	u8 buf = 0;

	/* Set PCON source control mode */
	buf |= DP_PCON_ENABLE_SOURCE_CTL_MODE;

	ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_PCON_HDMI_LINK_CONFIG_1, buf);
	if (ret < 0)
		return ret;

	/* Set HDMI LINK ENABLE */
	buf |= DP_PCON_ENABLE_HDMI_LINK;
	ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_PCON_HDMI_LINK_CONFIG_1, buf);
	if (ret < 0)
		return ret;

	return 0;
}

void intel_dp_check_frl_training(struct intel_dp *intel_dp)
{
	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);

	/*
	 * Always go for FRL training if:
	 * -PCON supports SRC_CTL_MODE (VESA DP2.0-HDMI2.1 PCON Spec Draft-1 Sec-7)
	 * -sink is HDMI2.1
	 */
	if (!(intel_dp->downstream_ports[2] & DP_PCON_SOURCE_CTL_MODE) ||
	    !intel_dp_is_hdmi_2_1_sink(intel_dp) ||
	    intel_dp->frl.is_trained)
		return;

	if (intel_dp_pcon_start_frl_training(intel_dp) < 0) {
		int ret, mode;

		drm_dbg(&dev_priv->drm, "Couldn't set FRL mode, continuing with TMDS mode\n");
		ret = intel_dp_pcon_set_tmds_mode(intel_dp);
		mode = drm_dp_pcon_hdmi_link_mode(&intel_dp->aux, NULL);

		if (ret < 0 || mode != DP_PCON_HDMI_MODE_TMDS)
			drm_dbg(&dev_priv->drm, "Issue with PCON, cannot set TMDS mode\n");
	} else {
		drm_dbg(&dev_priv->drm, "FRL training Completed\n");
	}
}

static int
intel_dp_pcon_dsc_enc_slice_height(const struct intel_crtc_state *crtc_state)
{
	int vactive = crtc_state->hw.adjusted_mode.vdisplay;

	return intel_hdmi_dsc_get_slice_height(vactive);
}

static int
intel_dp_pcon_dsc_enc_slices(struct intel_dp *intel_dp,
			     const struct intel_crtc_state *crtc_state)
{
	struct intel_connector *intel_connector = intel_dp->attached_connector;
	struct drm_connector *connector = &intel_connector->base;
	int hdmi_throughput = connector->display_info.hdmi.dsc_cap.clk_per_slice;
	int hdmi_max_slices = connector->display_info.hdmi.dsc_cap.max_slices;
	int pcon_max_slices = drm_dp_pcon_dsc_max_slices(intel_dp->pcon_dsc_dpcd);
	int pcon_max_slice_width = drm_dp_pcon_dsc_max_slice_width(intel_dp->pcon_dsc_dpcd);

	return intel_hdmi_dsc_get_num_slices(crtc_state, pcon_max_slices,
					     pcon_max_slice_width,
					     hdmi_max_slices, hdmi_throughput);
}

static int
intel_dp_pcon_dsc_enc_bpp(struct intel_dp *intel_dp,
			  const struct intel_crtc_state *crtc_state,
			  int num_slices, int slice_width)
{
	struct intel_connector *intel_connector = intel_dp->attached_connector;
	struct drm_connector *connector = &intel_connector->base;
	int output_format = crtc_state->output_format;
	bool hdmi_all_bpp = connector->display_info.hdmi.dsc_cap.all_bpp;
	int pcon_fractional_bpp = drm_dp_pcon_dsc_bpp_incr(intel_dp->pcon_dsc_dpcd);
	int hdmi_max_chunk_bytes =
		connector->display_info.hdmi.dsc_cap.total_chunk_kbytes * 1024;

	return intel_hdmi_dsc_get_bpp(pcon_fractional_bpp, slice_width,
				      num_slices, output_format, hdmi_all_bpp,
				      hdmi_max_chunk_bytes);
}

void
intel_dp_pcon_dsc_configure(struct intel_dp *intel_dp,
			    const struct intel_crtc_state *crtc_state)
{
	u8 pps_param[6];
	int slice_height;
	int slice_width;
	int num_slices;
	int bits_per_pixel;
	int ret;
	struct intel_connector *intel_connector = intel_dp->attached_connector;
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	struct drm_connector *connector;
	bool hdmi_is_dsc_1_2;

	if (!intel_dp_is_hdmi_2_1_sink(intel_dp))
		return;

	if (!intel_connector)
		return;
	connector = &intel_connector->base;
	hdmi_is_dsc_1_2 = connector->display_info.hdmi.dsc_cap.v_1p2;

	if (!drm_dp_pcon_enc_is_dsc_1_2(intel_dp->pcon_dsc_dpcd) ||
	    !hdmi_is_dsc_1_2)
		return;

	slice_height = intel_dp_pcon_dsc_enc_slice_height(crtc_state);
	if (!slice_height)
		return;

	num_slices = intel_dp_pcon_dsc_enc_slices(intel_dp, crtc_state);
	if (!num_slices)
		return;

	slice_width = DIV_ROUND_UP(crtc_state->hw.adjusted_mode.hdisplay,
				   num_slices);

	bits_per_pixel = intel_dp_pcon_dsc_enc_bpp(intel_dp, crtc_state,
						   num_slices, slice_width);
	if (!bits_per_pixel)
		return;

	pps_param[0] = slice_height & 0xFF;
	pps_param[1] = slice_height >> 8;
	pps_param[2] = slice_width & 0xFF;
	pps_param[3] = slice_width >> 8;
	pps_param[4] = bits_per_pixel & 0xFF;
	pps_param[5] = (bits_per_pixel >> 8) & 0x3;

	ret = drm_dp_pcon_pps_override_param(&intel_dp->aux, pps_param);
	if (ret < 0)
		drm_dbg_kms(&i915->drm, "Failed to set pcon DSC\n");
}

void intel_dp_configure_protocol_converter(struct intel_dp *intel_dp,
					   const struct intel_crtc_state *crtc_state)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	u8 tmp;

	if (intel_dp->dpcd[DP_DPCD_REV] < 0x13)
		return;

	if (!drm_dp_is_branch(intel_dp->dpcd))
		return;

	tmp = intel_dp->has_hdmi_sink ?
		DP_HDMI_DVI_OUTPUT_CONFIG : 0;

	if (drm_dp_dpcd_writeb(&intel_dp->aux,
			       DP_PROTOCOL_CONVERTER_CONTROL_0, tmp) != 1)
		drm_dbg_kms(&i915->drm, "Failed to %s protocol converter HDMI mode\n",
			    str_enable_disable(intel_dp->has_hdmi_sink));

	tmp = crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR444 &&
		intel_dp->dfp.ycbcr_444_to_420 ? DP_CONVERSION_TO_YCBCR420_ENABLE : 0;

	if (drm_dp_dpcd_writeb(&intel_dp->aux,
			       DP_PROTOCOL_CONVERTER_CONTROL_1, tmp) != 1)
		drm_dbg_kms(&i915->drm,
			    "Failed to %s protocol converter YCbCr 4:2:0 conversion mode\n",
			    str_enable_disable(intel_dp->dfp.ycbcr_444_to_420));

	tmp = intel_dp->dfp.rgb_to_ycbcr ?
		DP_CONVERSION_BT709_RGB_YCBCR_ENABLE : 0;

	if (drm_dp_pcon_convert_rgb_to_ycbcr(&intel_dp->aux, tmp) < 0)
		drm_dbg_kms(&i915->drm,
			   "Failed to %s protocol converter RGB->YCbCr conversion mode\n",
			   str_enable_disable(tmp));
}

bool intel_dp_get_colorimetry_status(struct intel_dp *intel_dp)
{
	u8 dprx = 0;

	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_DPRX_FEATURE_ENUMERATION_LIST,
			      &dprx) != 1)
		return false;
	return dprx & DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED;
}

static void intel_dp_get_dsc_sink_cap(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);

	/*
	 * Clear the cached register set to avoid using stale values
	 * for the sinks that do not support DSC.
	 */
	memset(intel_dp->dsc_dpcd, 0, sizeof(intel_dp->dsc_dpcd));

	/* Clear fec_capable to avoid using stale values */
	intel_dp->fec_capable = 0;

	/* Cache the DSC DPCD if eDP or DP rev >= 1.4 */
	if (intel_dp->dpcd[DP_DPCD_REV] >= 0x14 ||
	    intel_dp->edp_dpcd[0] >= DP_EDP_14) {
		if (drm_dp_dpcd_read(&intel_dp->aux, DP_DSC_SUPPORT,
				     intel_dp->dsc_dpcd,
				     sizeof(intel_dp->dsc_dpcd)) < 0)
			drm_err(&i915->drm,
				"Failed to read DPCD register 0x%x\n",
				DP_DSC_SUPPORT);

		drm_dbg_kms(&i915->drm, "DSC DPCD: %*ph\n",
			    (int)sizeof(intel_dp->dsc_dpcd),
			    intel_dp->dsc_dpcd);

		/* FEC is supported only on DP 1.4 */
		if (!intel_dp_is_edp(intel_dp) &&
		    drm_dp_dpcd_readb(&intel_dp->aux, DP_FEC_CAPABILITY,
				      &intel_dp->fec_capable) < 0)
			drm_err(&i915->drm,
				"Failed to read FEC DPCD register\n");

		drm_dbg_kms(&i915->drm, "FEC CAPABILITY: %x\n",
			    intel_dp->fec_capable);
	}
}

static void intel_edp_mso_mode_fixup(struct intel_connector *connector,
				     struct drm_display_mode *mode)
{
	struct intel_dp *intel_dp = intel_attached_dp(connector);
	struct drm_i915_private *i915 = to_i915(connector->base.dev);
	int n = intel_dp->mso_link_count;
	int overlap = intel_dp->mso_pixel_overlap;

	if (!mode || !n)
		return;

	mode->hdisplay = (mode->hdisplay - overlap) * n;
	mode->hsync_start = (mode->hsync_start - overlap) * n;
	mode->hsync_end = (mode->hsync_end - overlap) * n;
	mode->htotal = (mode->htotal - overlap) * n;
	mode->clock *= n;

	drm_mode_set_name(mode);

	drm_dbg_kms(&i915->drm,
		    "[CONNECTOR:%d:%s] using generated MSO mode: " DRM_MODE_FMT "\n",
		    connector->base.base.id, connector->base.name,
		    DRM_MODE_ARG(mode));
}

void intel_edp_fixup_vbt_bpp(struct intel_encoder *encoder, int pipe_bpp)
{
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
	struct intel_connector *connector = intel_dp->attached_connector;

	if (connector->panel.vbt.edp.bpp && pipe_bpp > connector->panel.vbt.edp.bpp) {
		/*
		 * This is a big fat ugly hack.
		 *
		 * Some machines in UEFI boot mode provide us a VBT that has 18
		 * bpp and 1.62 GHz link bandwidth for eDP, which for reasons
		 * unknown we fail to light up. Yet the same BIOS boots up with
		 * 24 bpp and 2.7 GHz link. Use the same bpp as the BIOS uses as
		 * max, not what it tells us to use.
		 *
		 * Note: This will still be broken if the eDP panel is not lit
		 * up by the BIOS, and thus we can't get the mode at module
		 * load.
		 */
		drm_dbg_kms(&dev_priv->drm,
			    "pipe has %d bpp for eDP panel, overriding BIOS-provided max %d bpp\n",
			    pipe_bpp, connector->panel.vbt.edp.bpp);
		connector->panel.vbt.edp.bpp = pipe_bpp;
	}
}

static void intel_edp_mso_init(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	struct intel_connector *connector = intel_dp->attached_connector;
	struct drm_display_info *info = &connector->base.display_info;
	u8 mso;

	if (intel_dp->edp_dpcd[0] < DP_EDP_14)
		return;

	if (drm_dp_dpcd_readb(&intel_dp->aux, DP_EDP_MSO_LINK_CAPABILITIES, &mso) != 1) {
		drm_err(&i915->drm, "Failed to read MSO cap\n");
		return;
	}

	/* Valid configurations are SST or MSO 2x1, 2x2, 4x1 */
	mso &= DP_EDP_MSO_NUMBER_OF_LINKS_MASK;
	if (mso % 2 || mso > drm_dp_max_lane_count(intel_dp->dpcd)) {
		drm_err(&i915->drm, "Invalid MSO link count cap %u\n", mso);
		mso = 0;
	}

	if (mso) {
		drm_dbg_kms(&i915->drm, "Sink MSO %ux%u configuration, pixel overlap %u\n",
			    mso, drm_dp_max_lane_count(intel_dp->dpcd) / mso,
			    info->mso_pixel_overlap);
		if (!HAS_MSO(i915)) {
			drm_err(&i915->drm, "No source MSO support, disabling\n");
			mso = 0;
		}
	}

	intel_dp->mso_link_count = mso;
	intel_dp->mso_pixel_overlap = mso ? info->mso_pixel_overlap : 0;
}

static bool
intel_edp_init_dpcd(struct intel_dp *intel_dp)
{
	struct drm_i915_private *dev_priv =
		to_i915(dp_to_dig_port(intel_dp)->base.base.dev);

	/* this function is meant to be called only once */
	drm_WARN_ON(&dev_priv->drm, intel_dp->dpcd[DP_DPCD_REV] != 0);

	if (drm_dp_read_dpcd_caps(&intel_dp->aux, intel_dp->dpcd) != 0)
		return false;

	drm_dp_read_desc(&intel_dp->aux, &intel_dp->desc,
			 drm_dp_is_branch(intel_dp->dpcd));

	/*
	 * Read the eDP display control registers.
	 *
	 * Do this independent of DP_DPCD_DISPLAY_CONTROL_CAPABLE bit in
	 * DP_EDP_CONFIGURATION_CAP, because some buggy displays do not have it
	 * set, but require eDP 1.4+ detection (e.g. for supported link rates
	 * method). The display control registers should read zero if they're
	 * not supported anyway.
	 */
	if (drm_dp_dpcd_read(&intel_dp->aux, DP_EDP_DPCD_REV,
			     intel_dp->edp_dpcd, sizeof(intel_dp->edp_dpcd)) ==
			     sizeof(intel_dp->edp_dpcd)) {
		drm_dbg_kms(&dev_priv->drm, "eDP DPCD: %*ph\n",
			    (int)sizeof(intel_dp->edp_dpcd),
			    intel_dp->edp_dpcd);

		intel_dp->use_max_params = intel_dp->edp_dpcd[0] < DP_EDP_14;
	}

	/*
	 * This has to be called after intel_dp->edp_dpcd is filled, PSR checks
	 * for SET_POWER_CAPABLE bit in intel_dp->edp_dpcd[1]
	 */
	intel_psr_init_dpcd(intel_dp);

	/* Clear the default sink rates */
	intel_dp->num_sink_rates = 0;

	/* Read the eDP 1.4+ supported link rates. */
	if (intel_dp->edp_dpcd[0] >= DP_EDP_14) {
		__le16 sink_rates[DP_MAX_SUPPORTED_RATES];
		int i;

		drm_dp_dpcd_read(&intel_dp->aux, DP_SUPPORTED_LINK_RATES,
				sink_rates, sizeof(sink_rates));

		for (i = 0; i < ARRAY_SIZE(sink_rates); i++) {
			int val = le16_to_cpu(sink_rates[i]);

			if (val == 0)
				break;

			/* Value read multiplied by 200kHz gives the per-lane
			 * link rate in kHz. The source rates are, however,
			 * stored in terms of LS_Clk kHz. The full conversion
			 * back to symbols is
			 * (val * 200kHz)*(8/10 ch. encoding)*(1/8 bit to Byte)
			 */
			intel_dp->sink_rates[i] = (val * 200) / 10;
		}
		intel_dp->num_sink_rates = i;
	}

	/*
	 * Use DP_LINK_RATE_SET if DP_SUPPORTED_LINK_RATES are available,
	 * default to DP_MAX_LINK_RATE and DP_LINK_BW_SET otherwise.
	 */
	if (intel_dp->num_sink_rates)
		intel_dp->use_rate_select = true;
	else
		intel_dp_set_sink_rates(intel_dp);
	intel_dp_set_max_sink_lane_count(intel_dp);

	/* Read the eDP DSC DPCD registers */
	if (DISPLAY_VER(dev_priv) >= 10)
		intel_dp_get_dsc_sink_cap(intel_dp);

	/*
	 * If needed, program our source OUI so we can make various Intel-specific AUX services
	 * available (such as HDR backlight controls)
	 */
	intel_edp_init_source_oui(intel_dp, true);

	return true;
}

static bool
intel_dp_has_sink_count(struct intel_dp *intel_dp)
{
	if (!intel_dp->attached_connector)
		return false;

	return drm_dp_read_sink_count_cap(&intel_dp->attached_connector->base,
					  intel_dp->dpcd,
					  &intel_dp->desc);
}

static bool
intel_dp_get_dpcd(struct intel_dp *intel_dp)
{
	int ret;

	if (intel_dp_init_lttpr_and_dprx_caps(intel_dp) < 0)
		return false;

	/*
	 * Don't clobber cached eDP rates. Also skip re-reading
	 * the OUI/ID since we know it won't change.
	 */
	if (!intel_dp_is_edp(intel_dp)) {
		drm_dp_read_desc(&intel_dp->aux, &intel_dp->desc,
				 drm_dp_is_branch(intel_dp->dpcd));

		intel_dp_set_sink_rates(intel_dp);
		intel_dp_set_max_sink_lane_count(intel_dp);
		intel_dp_set_common_rates(intel_dp);
	}

	if (intel_dp_has_sink_count(intel_dp)) {
		ret = drm_dp_read_sink_count(&intel_dp->aux);
		if (ret < 0)
			return false;

		/*
		 * Sink count can change between short pulse hpd hence
		 * a member variable in intel_dp will track any changes
		 * between short pulse interrupts.
		 */
		intel_dp->sink_count = ret;

		/*
		 * SINK_COUNT == 0 and DOWNSTREAM_PORT_PRESENT == 1 implies that
		 * a dongle is present but no display. Unless we require to know
		 * if a dongle is present or not, we don't need to update
		 * downstream port information. So, an early return here saves
		 * time from performing other operations which are not required.
		 */
		if (!intel_dp->sink_count)
			return false;
	}

	return drm_dp_read_downstream_info(&intel_dp->aux, intel_dp->dpcd,
					   intel_dp->downstream_ports) == 0;
}

static bool
intel_dp_can_mst(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);

	return i915->params.enable_dp_mst &&
		intel_dp_mst_source_support(intel_dp) &&
		drm_dp_read_mst_cap(&intel_dp->aux, intel_dp->dpcd);
}

static void
intel_dp_configure_mst(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	struct intel_encoder *encoder =
		&dp_to_dig_port(intel_dp)->base;
	bool sink_can_mst = drm_dp_read_mst_cap(&intel_dp->aux, intel_dp->dpcd);

	drm_dbg_kms(&i915->drm,
		    "[ENCODER:%d:%s] MST support: port: %s, sink: %s, modparam: %s\n",
		    encoder->base.base.id, encoder->base.name,
		    str_yes_no(intel_dp_mst_source_support(intel_dp)),
		    str_yes_no(sink_can_mst),
		    str_yes_no(i915->params.enable_dp_mst));

	if (!intel_dp_mst_source_support(intel_dp))
		return;

	intel_dp->is_mst = sink_can_mst &&
		i915->params.enable_dp_mst;

	drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
					intel_dp->is_mst);
}

static bool
intel_dp_get_sink_irq_esi(struct intel_dp *intel_dp, u8 *esi)
{
	return drm_dp_dpcd_read(&intel_dp->aux, DP_SINK_COUNT_ESI, esi, 4) == 4;
}

static bool intel_dp_ack_sink_irq_esi(struct intel_dp *intel_dp, u8 esi[4])
{
	int retry;

	for (retry = 0; retry < 3; retry++) {
		if (drm_dp_dpcd_write(&intel_dp->aux, DP_SINK_COUNT_ESI + 1,
				      &esi[1], 3) == 3)
			return true;
	}

	return false;
}

bool
intel_dp_needs_vsc_sdp(const struct intel_crtc_state *crtc_state,
		       const struct drm_connector_state *conn_state)
{
	/*
	 * As per DP 1.4a spec section 2.2.4.3 [MSA Field for Indication
	 * of Color Encoding Format and Content Color Gamut], in order to
	 * sending YCBCR 420 or HDR BT.2020 signals we should use DP VSC SDP.
	 */
	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
		return true;

	switch (conn_state->colorspace) {
	case DRM_MODE_COLORIMETRY_SYCC_601:
	case DRM_MODE_COLORIMETRY_OPYCC_601:
	case DRM_MODE_COLORIMETRY_BT2020_YCC:
	case DRM_MODE_COLORIMETRY_BT2020_RGB:
	case DRM_MODE_COLORIMETRY_BT2020_CYCC:
		return true;
	default:
		break;
	}

	return false;
}

static ssize_t intel_dp_vsc_sdp_pack(const struct drm_dp_vsc_sdp *vsc,
				     struct dp_sdp *sdp, size_t size)
{
	size_t length = sizeof(struct dp_sdp);

	if (size < length)
		return -ENOSPC;

	memset(sdp, 0, size);

	/*
	 * Prepare VSC Header for SU as per DP 1.4a spec, Table 2-119
	 * VSC SDP Header Bytes
	 */
	sdp->sdp_header.HB0 = 0; /* Secondary-Data Packet ID = 0 */
	sdp->sdp_header.HB1 = vsc->sdp_type; /* Secondary-data Packet Type */
	sdp->sdp_header.HB2 = vsc->revision; /* Revision Number */
	sdp->sdp_header.HB3 = vsc->length; /* Number of Valid Data Bytes */

	/*
	 * Only revision 0x5 supports Pixel Encoding/Colorimetry Format as
	 * per DP 1.4a spec.
	 */
	if (vsc->revision != 0x5)
		goto out;

	/* VSC SDP Payload for DB16 through DB18 */
	/* Pixel Encoding and Colorimetry Formats  */
	sdp->db[16] = (vsc->pixelformat & 0xf) << 4; /* DB16[7:4] */
	sdp->db[16] |= vsc->colorimetry & 0xf; /* DB16[3:0] */

	switch (vsc->bpc) {
	case 6:
		/* 6bpc: 0x0 */
		break;
	case 8:
		sdp->db[17] = 0x1; /* DB17[3:0] */
		break;
	case 10:
		sdp->db[17] = 0x2;
		break;
	case 12:
		sdp->db[17] = 0x3;
		break;
	case 16:
		sdp->db[17] = 0x4;
		break;
	default:
		MISSING_CASE(vsc->bpc);
		break;
	}
	/* Dynamic Range and Component Bit Depth */
	if (vsc->dynamic_range == DP_DYNAMIC_RANGE_CTA)
		sdp->db[17] |= 0x80;  /* DB17[7] */

	/* Content Type */
	sdp->db[18] = vsc->content_type & 0x7;

out:
	return length;
}

static ssize_t
intel_dp_hdr_metadata_infoframe_sdp_pack(struct drm_i915_private *i915,
					 const struct hdmi_drm_infoframe *drm_infoframe,
					 struct dp_sdp *sdp,
					 size_t size)
{
	size_t length = sizeof(struct dp_sdp);
	const int infoframe_size = HDMI_INFOFRAME_HEADER_SIZE + HDMI_DRM_INFOFRAME_SIZE;
	unsigned char buf[HDMI_INFOFRAME_HEADER_SIZE + HDMI_DRM_INFOFRAME_SIZE];
	ssize_t len;

	if (size < length)
		return -ENOSPC;

	memset(sdp, 0, size);

	len = hdmi_drm_infoframe_pack_only(drm_infoframe, buf, sizeof(buf));
	if (len < 0) {
		drm_dbg_kms(&i915->drm, "buffer size is smaller than hdr metadata infoframe\n");
		return -ENOSPC;
	}

	if (len != infoframe_size) {
		drm_dbg_kms(&i915->drm, "wrong static hdr metadata size\n");
		return -ENOSPC;
	}

	/*
	 * Set up the infoframe sdp packet for HDR static metadata.
	 * Prepare VSC Header for SU as per DP 1.4a spec,
	 * Table 2-100 and Table 2-101
	 */

	/* Secondary-Data Packet ID, 00h for non-Audio INFOFRAME */
	sdp->sdp_header.HB0 = 0;
	/*
	 * Packet Type 80h + Non-audio INFOFRAME Type value
	 * HDMI_INFOFRAME_TYPE_DRM: 0x87
	 * - 80h + Non-audio INFOFRAME Type value
	 * - InfoFrame Type: 0x07
	 *    [CTA-861-G Table-42 Dynamic Range and Mastering InfoFrame]
	 */
	sdp->sdp_header.HB1 = drm_infoframe->type;
	/*
	 * Least Significant Eight Bits of (Data Byte Count – 1)
	 * infoframe_size - 1
	 */
	sdp->sdp_header.HB2 = 0x1D;
	/* INFOFRAME SDP Version Number */
	sdp->sdp_header.HB3 = (0x13 << 2);
	/* CTA Header Byte 2 (INFOFRAME Version Number) */
	sdp->db[0] = drm_infoframe->version;
	/* CTA Header Byte 3 (Length of INFOFRAME): HDMI_DRM_INFOFRAME_SIZE */
	sdp->db[1] = drm_infoframe->length;
	/*
	 * Copy HDMI_DRM_INFOFRAME_SIZE size from a buffer after
	 * HDMI_INFOFRAME_HEADER_SIZE
	 */
	BUILD_BUG_ON(sizeof(sdp->db) < HDMI_DRM_INFOFRAME_SIZE + 2);
	memcpy(&sdp->db[2], &buf[HDMI_INFOFRAME_HEADER_SIZE],
	       HDMI_DRM_INFOFRAME_SIZE);

	/*
	 * Size of DP infoframe sdp packet for HDR static metadata consists of
	 * - DP SDP Header(struct dp_sdp_header): 4 bytes
	 * - Two Data Blocks: 2 bytes
	 *    CTA Header Byte2 (INFOFRAME Version Number)
	 *    CTA Header Byte3 (Length of INFOFRAME)
	 * - HDMI_DRM_INFOFRAME_SIZE: 26 bytes
	 *
	 * Prior to GEN11's GMP register size is identical to DP HDR static metadata
	 * infoframe size. But GEN11+ has larger than that size, write_infoframe
	 * will pad rest of the size.
	 */
	return sizeof(struct dp_sdp_header) + 2 + HDMI_DRM_INFOFRAME_SIZE;
}

static void intel_write_dp_sdp(struct intel_encoder *encoder,
			       const struct intel_crtc_state *crtc_state,
			       unsigned int type)
{
	struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
	struct dp_sdp sdp = {};
	ssize_t len;

	if ((crtc_state->infoframes.enable &
	     intel_hdmi_infoframe_enable(type)) == 0)
		return;

	switch (type) {
	case DP_SDP_VSC:
		len = intel_dp_vsc_sdp_pack(&crtc_state->infoframes.vsc, &sdp,
					    sizeof(sdp));
		break;
	case HDMI_PACKET_TYPE_GAMUT_METADATA:
		len = intel_dp_hdr_metadata_infoframe_sdp_pack(dev_priv,
							       &crtc_state->infoframes.drm.drm,
							       &sdp, sizeof(sdp));
		break;
	default:
		MISSING_CASE(type);
		return;
	}

	if (drm_WARN_ON(&dev_priv->drm, len < 0))
		return;

	dig_port->write_infoframe(encoder, crtc_state, type, &sdp, len);
}

void intel_write_dp_vsc_sdp(struct intel_encoder *encoder,
			    const struct intel_crtc_state *crtc_state,
			    const struct drm_dp_vsc_sdp *vsc)
{
	struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
	struct dp_sdp sdp = {};
	ssize_t len;

	len = intel_dp_vsc_sdp_pack(vsc, &sdp, sizeof(sdp));

	if (drm_WARN_ON(&dev_priv->drm, len < 0))
		return;

	dig_port->write_infoframe(encoder, crtc_state, DP_SDP_VSC,
					&sdp, len);
}

void intel_dp_set_infoframes(struct intel_encoder *encoder,
			     bool enable,
			     const struct intel_crtc_state *crtc_state,
			     const struct drm_connector_state *conn_state)
{
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
	i915_reg_t reg = HSW_TVIDEO_DIP_CTL(crtc_state->cpu_transcoder);
	u32 dip_enable = VIDEO_DIP_ENABLE_AVI_HSW | VIDEO_DIP_ENABLE_GCP_HSW |
			 VIDEO_DIP_ENABLE_VS_HSW | VIDEO_DIP_ENABLE_GMP_HSW |
			 VIDEO_DIP_ENABLE_SPD_HSW | VIDEO_DIP_ENABLE_DRM_GLK;
	u32 val = intel_de_read(dev_priv, reg) & ~dip_enable;

	/* TODO: Add DSC case (DIP_ENABLE_PPS) */
	/* When PSR is enabled, this routine doesn't disable VSC DIP */
	if (!crtc_state->has_psr)
		val &= ~VIDEO_DIP_ENABLE_VSC_HSW;

	intel_de_write(dev_priv, reg, val);
	intel_de_posting_read(dev_priv, reg);

	if (!enable)
		return;

	/* When PSR is enabled, VSC SDP is handled by PSR routine */
	if (!crtc_state->has_psr)
		intel_write_dp_sdp(encoder, crtc_state, DP_SDP_VSC);

	intel_write_dp_sdp(encoder, crtc_state, HDMI_PACKET_TYPE_GAMUT_METADATA);
}

static int intel_dp_vsc_sdp_unpack(struct drm_dp_vsc_sdp *vsc,
				   const void *buffer, size_t size)
{
	const struct dp_sdp *sdp = buffer;

	if (size < sizeof(struct dp_sdp))
		return -EINVAL;

	memset(vsc, 0, sizeof(*vsc));

	if (sdp->sdp_header.HB0 != 0)
		return -EINVAL;

	if (sdp->sdp_header.HB1 != DP_SDP_VSC)
		return -EINVAL;

	vsc->sdp_type = sdp->sdp_header.HB1;
	vsc->revision = sdp->sdp_header.HB2;
	vsc->length = sdp->sdp_header.HB3;

	if ((sdp->sdp_header.HB2 == 0x2 && sdp->sdp_header.HB3 == 0x8) ||
	    (sdp->sdp_header.HB2 == 0x4 && sdp->sdp_header.HB3 == 0xe)) {
		/*
		 * - HB2 = 0x2, HB3 = 0x8
		 *   VSC SDP supporting 3D stereo + PSR
		 * - HB2 = 0x4, HB3 = 0xe
		 *   VSC SDP supporting 3D stereo + PSR2 with Y-coordinate of
		 *   first scan line of the SU region (applies to eDP v1.4b
		 *   and higher).
		 */
		return 0;
	} else if (sdp->sdp_header.HB2 == 0x5 && sdp->sdp_header.HB3 == 0x13) {
		/*
		 * - HB2 = 0x5, HB3 = 0x13
		 *   VSC SDP supporting 3D stereo + PSR2 + Pixel Encoding/Colorimetry
		 *   Format.
		 */
		vsc->pixelformat = (sdp->db[16] >> 4) & 0xf;
		vsc->colorimetry = sdp->db[16] & 0xf;
		vsc->dynamic_range = (sdp->db[17] >> 7) & 0x1;

		switch (sdp->db[17] & 0x7) {
		case 0x0:
			vsc->bpc = 6;
			break;
		case 0x1:
			vsc->bpc = 8;
			break;
		case 0x2:
			vsc->bpc = 10;
			break;
		case 0x3:
			vsc->bpc = 12;
			break;
		case 0x4:
			vsc->bpc = 16;
			break;
		default:
			MISSING_CASE(sdp->db[17] & 0x7);
			return -EINVAL;
		}

		vsc->content_type = sdp->db[18] & 0x7;
	} else {
		return -EINVAL;
	}

	return 0;
}

static int
intel_dp_hdr_metadata_infoframe_sdp_unpack(struct hdmi_drm_infoframe *drm_infoframe,
					   const void *buffer, size_t size)
{
	int ret;

	const struct dp_sdp *sdp = buffer;

	if (size < sizeof(struct dp_sdp))
		return -EINVAL;

	if (sdp->sdp_header.HB0 != 0)
		return -EINVAL;

	if (sdp->sdp_header.HB1 != HDMI_INFOFRAME_TYPE_DRM)
		return -EINVAL;

	/*
	 * Least Significant Eight Bits of (Data Byte Count – 1)
	 * 1Dh (i.e., Data Byte Count = 30 bytes).
	 */
	if (sdp->sdp_header.HB2 != 0x1D)
		return -EINVAL;

	/* Most Significant Two Bits of (Data Byte Count – 1), Clear to 00b. */
	if ((sdp->sdp_header.HB3 & 0x3) != 0)
		return -EINVAL;

	/* INFOFRAME SDP Version Number */
	if (((sdp->sdp_header.HB3 >> 2) & 0x3f) != 0x13)
		return -EINVAL;

	/* CTA Header Byte 2 (INFOFRAME Version Number) */
	if (sdp->db[0] != 1)
		return -EINVAL;

	/* CTA Header Byte 3 (Length of INFOFRAME): HDMI_DRM_INFOFRAME_SIZE */
	if (sdp->db[1] != HDMI_DRM_INFOFRAME_SIZE)
		return -EINVAL;

	ret = hdmi_drm_infoframe_unpack_only(drm_infoframe, &sdp->db[2],
					     HDMI_DRM_INFOFRAME_SIZE);

	return ret;
}

static void intel_read_dp_vsc_sdp(struct intel_encoder *encoder,
				  struct intel_crtc_state *crtc_state,
				  struct drm_dp_vsc_sdp *vsc)
{
	struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
	unsigned int type = DP_SDP_VSC;
	struct dp_sdp sdp = {};
	int ret;

	/* When PSR is enabled, VSC SDP is handled by PSR routine */
	if (crtc_state->has_psr)
		return;

	if ((crtc_state->infoframes.enable &
	     intel_hdmi_infoframe_enable(type)) == 0)
		return;

	dig_port->read_infoframe(encoder, crtc_state, type, &sdp, sizeof(sdp));

	ret = intel_dp_vsc_sdp_unpack(vsc, &sdp, sizeof(sdp));

	if (ret)
		drm_dbg_kms(&dev_priv->drm, "Failed to unpack DP VSC SDP\n");
}

static void intel_read_dp_hdr_metadata_infoframe_sdp(struct intel_encoder *encoder,
						     struct intel_crtc_state *crtc_state,
						     struct hdmi_drm_infoframe *drm_infoframe)
{
	struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
	unsigned int type = HDMI_PACKET_TYPE_GAMUT_METADATA;
	struct dp_sdp sdp = {};
	int ret;

	if ((crtc_state->infoframes.enable &
	    intel_hdmi_infoframe_enable(type)) == 0)
		return;

	dig_port->read_infoframe(encoder, crtc_state, type, &sdp,
				 sizeof(sdp));

	ret = intel_dp_hdr_metadata_infoframe_sdp_unpack(drm_infoframe, &sdp,
							 sizeof(sdp));

	if (ret)
		drm_dbg_kms(&dev_priv->drm,
			    "Failed to unpack DP HDR Metadata Infoframe SDP\n");
}

void intel_read_dp_sdp(struct intel_encoder *encoder,
		       struct intel_crtc_state *crtc_state,
		       unsigned int type)
{
	switch (type) {
	case DP_SDP_VSC:
		intel_read_dp_vsc_sdp(encoder, crtc_state,
				      &crtc_state->infoframes.vsc);
		break;
	case HDMI_PACKET_TYPE_GAMUT_METADATA:
		intel_read_dp_hdr_metadata_infoframe_sdp(encoder, crtc_state,
							 &crtc_state->infoframes.drm.drm);
		break;
	default:
		MISSING_CASE(type);
		break;
	}
}

static u8 intel_dp_autotest_link_training(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	int status = 0;
	int test_link_rate;
	u8 test_lane_count, test_link_bw;
	/* (DP CTS 1.2)
	 * 4.3.1.11
	 */
	/* Read the TEST_LANE_COUNT and TEST_LINK_RTAE fields (DP CTS 3.1.4) */
	status = drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_LANE_COUNT,
				   &test_lane_count);

	if (status <= 0) {
		drm_dbg_kms(&i915->drm, "Lane count read failed\n");
		return DP_TEST_NAK;
	}
	test_lane_count &= DP_MAX_LANE_COUNT_MASK;

	status = drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_LINK_RATE,
				   &test_link_bw);
	if (status <= 0) {
		drm_dbg_kms(&i915->drm, "Link Rate read failed\n");
		return DP_TEST_NAK;
	}
	test_link_rate = drm_dp_bw_code_to_link_rate(test_link_bw);

	/* Validate the requested link rate and lane count */
	if (!intel_dp_link_params_valid(intel_dp, test_link_rate,
					test_lane_count))
		return DP_TEST_NAK;

	intel_dp->compliance.test_lane_count = test_lane_count;
	intel_dp->compliance.test_link_rate = test_link_rate;

	return DP_TEST_ACK;
}

static u8 intel_dp_autotest_video_pattern(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	u8 test_pattern;
	u8 test_misc;
	__be16 h_width, v_height;
	int status = 0;

	/* Read the TEST_PATTERN (DP CTS 3.1.5) */
	status = drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_PATTERN,
				   &test_pattern);
	if (status <= 0) {
		drm_dbg_kms(&i915->drm, "Test pattern read failed\n");
		return DP_TEST_NAK;
	}
	if (test_pattern != DP_COLOR_RAMP)
		return DP_TEST_NAK;

	status = drm_dp_dpcd_read(&intel_dp->aux, DP_TEST_H_WIDTH_HI,
				  &h_width, 2);
	if (status <= 0) {
		drm_dbg_kms(&i915->drm, "H Width read failed\n");
		return DP_TEST_NAK;
	}

	status = drm_dp_dpcd_read(&intel_dp->aux, DP_TEST_V_HEIGHT_HI,
				  &v_height, 2);
	if (status <= 0) {
		drm_dbg_kms(&i915->drm, "V Height read failed\n");
		return DP_TEST_NAK;
	}

	status = drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_MISC0,
				   &test_misc);
	if (status <= 0) {
		drm_dbg_kms(&i915->drm, "TEST MISC read failed\n");
		return DP_TEST_NAK;
	}
	if ((test_misc & DP_TEST_COLOR_FORMAT_MASK) != DP_COLOR_FORMAT_RGB)
		return DP_TEST_NAK;
	if (test_misc & DP_TEST_DYNAMIC_RANGE_CEA)
		return DP_TEST_NAK;
	switch (test_misc & DP_TEST_BIT_DEPTH_MASK) {
	case DP_TEST_BIT_DEPTH_6:
		intel_dp->compliance.test_data.bpc = 6;
		break;
	case DP_TEST_BIT_DEPTH_8:
		intel_dp->compliance.test_data.bpc = 8;
		break;
	default:
		return DP_TEST_NAK;
	}

	intel_dp->compliance.test_data.video_pattern = test_pattern;
	intel_dp->compliance.test_data.hdisplay = be16_to_cpu(h_width);
	intel_dp->compliance.test_data.vdisplay = be16_to_cpu(v_height);
	/* Set test active flag here so userspace doesn't interrupt things */
	intel_dp->compliance.test_active = true;

	return DP_TEST_ACK;
}

static u8 intel_dp_autotest_edid(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	u8 test_result = DP_TEST_ACK;
	struct intel_connector *intel_connector = intel_dp->attached_connector;
	struct drm_connector *connector = &intel_connector->base;

	if (intel_connector->detect_edid == NULL ||
	    connector->edid_corrupt ||
	    intel_dp->aux.i2c_defer_count > 6) {
		/* Check EDID read for NACKs, DEFERs and corruption
		 * (DP CTS 1.2 Core r1.1)
		 *    4.2.2.4 : Failed EDID read, I2C_NAK
		 *    4.2.2.5 : Failed EDID read, I2C_DEFER
		 *    4.2.2.6 : EDID corruption detected
		 * Use failsafe mode for all cases
		 */
		if (intel_dp->aux.i2c_nack_count > 0 ||
			intel_dp->aux.i2c_defer_count > 0)
			drm_dbg_kms(&i915->drm,
				    "EDID read had %d NACKs, %d DEFERs\n",
				    intel_dp->aux.i2c_nack_count,
				    intel_dp->aux.i2c_defer_count);
		intel_dp->compliance.test_data.edid = INTEL_DP_RESOLUTION_FAILSAFE;
	} else {
		struct edid *block = intel_connector->detect_edid;

		/* We have to write the checksum
		 * of the last block read
		 */
		block += intel_connector->detect_edid->extensions;

		if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_EDID_CHECKSUM,
				       block->checksum) <= 0)
			drm_dbg_kms(&i915->drm,
				    "Failed to write EDID checksum\n");

		test_result = DP_TEST_ACK | DP_TEST_EDID_CHECKSUM_WRITE;
		intel_dp->compliance.test_data.edid = INTEL_DP_RESOLUTION_PREFERRED;
	}

	/* Set test active flag here so userspace doesn't interrupt things */
	intel_dp->compliance.test_active = true;

	return test_result;
}

static void intel_dp_phy_pattern_update(struct intel_dp *intel_dp,
					const struct intel_crtc_state *crtc_state)
{
	struct drm_i915_private *dev_priv =
			to_i915(dp_to_dig_port(intel_dp)->base.base.dev);
	struct drm_dp_phy_test_params *data =
			&intel_dp->compliance.test_data.phytest;
	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
	enum pipe pipe = crtc->pipe;
	u32 pattern_val;

	switch (data->phy_pattern) {
	case DP_PHY_TEST_PATTERN_NONE:
		drm_dbg_kms(&dev_priv->drm, "Disable Phy Test Pattern\n");
		intel_de_write(dev_priv, DDI_DP_COMP_CTL(pipe), 0x0);
		break;
	case DP_PHY_TEST_PATTERN_D10_2:
		drm_dbg_kms(&dev_priv->drm, "Set D10.2 Phy Test Pattern\n");
		intel_de_write(dev_priv, DDI_DP_COMP_CTL(pipe),
			       DDI_DP_COMP_CTL_ENABLE | DDI_DP_COMP_CTL_D10_2);
		break;
	case DP_PHY_TEST_PATTERN_ERROR_COUNT:
		drm_dbg_kms(&dev_priv->drm, "Set Error Count Phy Test Pattern\n");
		intel_de_write(dev_priv, DDI_DP_COMP_CTL(pipe),
			       DDI_DP_COMP_CTL_ENABLE |
			       DDI_DP_COMP_CTL_SCRAMBLED_0);
		break;
	case DP_PHY_TEST_PATTERN_PRBS7:
		drm_dbg_kms(&dev_priv->drm, "Set PRBS7 Phy Test Pattern\n");
		intel_de_write(dev_priv, DDI_DP_COMP_CTL(pipe),
			       DDI_DP_COMP_CTL_ENABLE | DDI_DP_COMP_CTL_PRBS7);
		break;
	case DP_PHY_TEST_PATTERN_80BIT_CUSTOM:
		/*
		 * FIXME: Ideally pattern should come from DPCD 0x250. As
		 * current firmware of DPR-100 could not set it, so hardcoding
		 * now for complaince test.
		 */
		drm_dbg_kms(&dev_priv->drm,
			    "Set 80Bit Custom Phy Test Pattern 0x3e0f83e0 0x0f83e0f8 0x0000f83e\n");
		pattern_val = 0x3e0f83e0;
		intel_de_write(dev_priv, DDI_DP_COMP_PAT(pipe, 0), pattern_val);
		pattern_val = 0x0f83e0f8;
		intel_de_write(dev_priv, DDI_DP_COMP_PAT(pipe, 1), pattern_val);
		pattern_val = 0x0000f83e;
		intel_de_write(dev_priv, DDI_DP_COMP_PAT(pipe, 2), pattern_val);
		intel_de_write(dev_priv, DDI_DP_COMP_CTL(pipe),
			       DDI_DP_COMP_CTL_ENABLE |
			       DDI_DP_COMP_CTL_CUSTOM80);
		break;
	case DP_PHY_TEST_PATTERN_CP2520:
		/*
		 * FIXME: Ideally pattern should come from DPCD 0x24A. As
		 * current firmware of DPR-100 could not set it, so hardcoding
		 * now for complaince test.
		 */
		drm_dbg_kms(&dev_priv->drm, "Set HBR2 compliance Phy Test Pattern\n");
		pattern_val = 0xFB;
		intel_de_write(dev_priv, DDI_DP_COMP_CTL(pipe),
			       DDI_DP_COMP_CTL_ENABLE | DDI_DP_COMP_CTL_HBR2 |
			       pattern_val);
		break;
	default:
		WARN(1, "Invalid Phy Test Pattern\n");
	}
}

static void intel_dp_process_phy_request(struct intel_dp *intel_dp,
					 const struct intel_crtc_state *crtc_state)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	struct drm_dp_phy_test_params *data =
		&intel_dp->compliance.test_data.phytest;
	u8 link_status[DP_LINK_STATUS_SIZE];

	if (drm_dp_dpcd_read_phy_link_status(&intel_dp->aux, DP_PHY_DPRX,
					     link_status) < 0) {
		drm_dbg_kms(&i915->drm, "failed to get link status\n");
		return;
	}

	/* retrieve vswing & pre-emphasis setting */
	intel_dp_get_adjust_train(intel_dp, crtc_state, DP_PHY_DPRX,
				  link_status);

	intel_dp_set_signal_levels(intel_dp, crtc_state, DP_PHY_DPRX);

	intel_dp_phy_pattern_update(intel_dp, crtc_state);

	drm_dp_dpcd_write(&intel_dp->aux, DP_TRAINING_LANE0_SET,
			  intel_dp->train_set, crtc_state->lane_count);

	drm_dp_set_phy_test_pattern(&intel_dp->aux, data,
				    link_status[DP_DPCD_REV]);
}

static u8 intel_dp_autotest_phy_pattern(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	struct drm_dp_phy_test_params *data =
		&intel_dp->compliance.test_data.phytest;

	if (drm_dp_get_phy_test_pattern(&intel_dp->aux, data)) {
		drm_dbg_kms(&i915->drm, "DP Phy Test pattern AUX read failure\n");
		return DP_TEST_NAK;
	}

	/* Set test active flag here so userspace doesn't interrupt things */
	intel_dp->compliance.test_active = true;

	return DP_TEST_ACK;
}

static void intel_dp_handle_test_request(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	u8 response = DP_TEST_NAK;
	u8 request = 0;
	int status;

	status = drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_REQUEST, &request);
	if (status <= 0) {
		drm_dbg_kms(&i915->drm,
			    "Could not read test request from sink\n");
		goto update_status;
	}

	switch (request) {
	case DP_TEST_LINK_TRAINING:
		drm_dbg_kms(&i915->drm, "LINK_TRAINING test requested\n");
		response = intel_dp_autotest_link_training(intel_dp);
		break;
	case DP_TEST_LINK_VIDEO_PATTERN:
		drm_dbg_kms(&i915->drm, "TEST_PATTERN test requested\n");
		response = intel_dp_autotest_video_pattern(intel_dp);
		break;
	case DP_TEST_LINK_EDID_READ:
		drm_dbg_kms(&i915->drm, "EDID test requested\n");
		response = intel_dp_autotest_edid(intel_dp);
		break;
	case DP_TEST_LINK_PHY_TEST_PATTERN:
		drm_dbg_kms(&i915->drm, "PHY_PATTERN test requested\n");
		response = intel_dp_autotest_phy_pattern(intel_dp);
		break;
	default:
		drm_dbg_kms(&i915->drm, "Invalid test request '%02x'\n",
			    request);
		break;
	}

	if (response & DP_TEST_ACK)
		intel_dp->compliance.test_type = request;

update_status:
	status = drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_RESPONSE, response);
	if (status <= 0)
		drm_dbg_kms(&i915->drm,
			    "Could not write test response to sink\n");
}

static bool intel_dp_link_ok(struct intel_dp *intel_dp,
			     u8 link_status[DP_LINK_STATUS_SIZE])
{
	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
	bool uhbr = intel_dp->link_rate >= 1000000;
	bool ok;

	if (uhbr)
		ok = drm_dp_128b132b_lane_channel_eq_done(link_status,
							  intel_dp->lane_count);
	else
		ok = drm_dp_channel_eq_ok(link_status, intel_dp->lane_count);

	if (ok)
		return true;

	intel_dp_dump_link_status(intel_dp, DP_PHY_DPRX, link_status);
	drm_dbg_kms(&i915->drm,
		    "[ENCODER:%d:%s] %s link not ok, retraining\n",
		    encoder->base.base.id, encoder->base.name,
		    uhbr ? "128b/132b" : "8b/10b");

	return false;
}

static void
intel_dp_mst_hpd_irq(struct intel_dp *intel_dp, u8 *esi, u8 *ack)
{
	bool handled = false;

	drm_dp_mst_hpd_irq(&intel_dp->mst_mgr, esi, &handled);
	if (handled)
		ack[1] |= esi[1] & (DP_DOWN_REP_MSG_RDY | DP_UP_REQ_MSG_RDY);

	if (esi[1] & DP_CP_IRQ) {
		intel_hdcp_handle_cp_irq(intel_dp->attached_connector);
		ack[1] |= DP_CP_IRQ;
	}
}

static bool intel_dp_mst_link_status(struct intel_dp *intel_dp)
{
	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
	u8 link_status[DP_LINK_STATUS_SIZE] = {};
	const size_t esi_link_status_size = DP_LINK_STATUS_SIZE - 2;

	if (drm_dp_dpcd_read(&intel_dp->aux, DP_LANE0_1_STATUS_ESI, link_status,
			     esi_link_status_size) != esi_link_status_size) {
		drm_err(&i915->drm,
			"[ENCODER:%d:%s] Failed to read link status\n",
			encoder->base.base.id, encoder->base.name);
		return false;
	}

	return intel_dp_link_ok(intel_dp, link_status);
}

/**
 * intel_dp_check_mst_status - service any pending MST interrupts, check link status
 * @intel_dp: Intel DP struct
 *
 * Read any pending MST interrupts, call MST core to handle these and ack the
 * interrupts. Check if the main and AUX link state is ok.
 *
 * Returns:
 * - %true if pending interrupts were serviced (or no interrupts were
 *   pending) w/o detecting an error condition.
 * - %false if an error condition - like AUX failure or a loss of link - is
 *   detected, which needs servicing from the hotplug work.
 */
static bool
intel_dp_check_mst_status(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	bool link_ok = true;

	drm_WARN_ON_ONCE(&i915->drm, intel_dp->active_mst_links < 0);

	for (;;) {
		u8 esi[4] = {};
		u8 ack[4] = {};

		if (!intel_dp_get_sink_irq_esi(intel_dp, esi)) {
			drm_dbg_kms(&i915->drm,
				    "failed to get ESI - device may have failed\n");
			link_ok = false;

			break;
		}

		drm_dbg_kms(&i915->drm, "DPRX ESI: %4ph\n", esi);

		if (intel_dp->active_mst_links > 0 && link_ok &&
		    esi[3] & LINK_STATUS_CHANGED) {
			if (!intel_dp_mst_link_status(intel_dp))
				link_ok = false;
			ack[3] |= LINK_STATUS_CHANGED;
		}

		intel_dp_mst_hpd_irq(intel_dp, esi, ack);

		if (!memchr_inv(ack, 0, sizeof(ack)))
			break;

		if (!intel_dp_ack_sink_irq_esi(intel_dp, ack))
			drm_dbg_kms(&i915->drm, "Failed to ack ESI\n");
	}

	return link_ok;
}

static void
intel_dp_handle_hdmi_link_status_change(struct intel_dp *intel_dp)
{
	bool is_active;
	u8 buf = 0;

	is_active = drm_dp_pcon_hdmi_link_active(&intel_dp->aux);
	if (intel_dp->frl.is_trained && !is_active) {
		if (drm_dp_dpcd_readb(&intel_dp->aux, DP_PCON_HDMI_LINK_CONFIG_1, &buf) < 0)
			return;

		buf &=  ~DP_PCON_ENABLE_HDMI_LINK;
		if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_PCON_HDMI_LINK_CONFIG_1, buf) < 0)
			return;

		drm_dp_pcon_hdmi_frl_link_error_count(&intel_dp->aux, &intel_dp->attached_connector->base);

		intel_dp->frl.is_trained = false;

		/* Restart FRL training or fall back to TMDS mode */
		intel_dp_check_frl_training(intel_dp);
	}
}

static bool
intel_dp_needs_link_retrain(struct intel_dp *intel_dp)
{
	u8 link_status[DP_LINK_STATUS_SIZE];

	if (!intel_dp->link_trained)
		return false;

	/*
	 * While PSR source HW is enabled, it will control main-link sending
	 * frames, enabling and disabling it so trying to do a retrain will fail
	 * as the link would or not be on or it could mix training patterns
	 * and frame data at the same time causing retrain to fail.
	 * Also when exiting PSR, HW will retrain the link anyways fixing
	 * any link status error.
	 */
	if (intel_psr_enabled(intel_dp))
		return false;

	if (drm_dp_dpcd_read_phy_link_status(&intel_dp->aux, DP_PHY_DPRX,
					     link_status) < 0)
		return false;

	/*
	 * Validate the cached values of intel_dp->link_rate and
	 * intel_dp->lane_count before attempting to retrain.
	 *
	 * FIXME would be nice to user the crtc state here, but since
	 * we need to call this from the short HPD handler that seems
	 * a bit hard.
	 */
	if (!intel_dp_link_params_valid(intel_dp, intel_dp->link_rate,
					intel_dp->lane_count))
		return false;

	/* Retrain if link not ok */
	return !intel_dp_link_ok(intel_dp, link_status);
}

static bool intel_dp_has_connector(struct intel_dp *intel_dp,
				   const struct drm_connector_state *conn_state)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	struct intel_encoder *encoder;
	enum pipe pipe;

	if (!conn_state->best_encoder)
		return false;

	/* SST */
	encoder = &dp_to_dig_port(intel_dp)->base;
	if (conn_state->best_encoder == &encoder->base)
		return true;

	/* MST */
	for_each_pipe(i915, pipe) {
		encoder = &intel_dp->mst_encoders[pipe]->base;
		if (conn_state->best_encoder == &encoder->base)
			return true;
	}

	return false;
}

static int intel_dp_prep_link_retrain(struct intel_dp *intel_dp,
				      struct drm_modeset_acquire_ctx *ctx,
				      u8 *pipe_mask)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	struct drm_connector_list_iter conn_iter;
	struct intel_connector *connector;
	int ret = 0;

	*pipe_mask = 0;

	if (!intel_dp_needs_link_retrain(intel_dp))
		return 0;

	drm_connector_list_iter_begin(&i915->drm, &conn_iter);
	for_each_intel_connector_iter(connector, &conn_iter) {
		struct drm_connector_state *conn_state =
			connector->base.state;
		struct intel_crtc_state *crtc_state;
		struct intel_crtc *crtc;

		if (!intel_dp_has_connector(intel_dp, conn_state))
			continue;

		crtc = to_intel_crtc(conn_state->crtc);
		if (!crtc)
			continue;

		ret = drm_modeset_lock(&crtc->base.mutex, ctx);
		if (ret)
			break;

		crtc_state = to_intel_crtc_state(crtc->base.state);

		drm_WARN_ON(&i915->drm, !intel_crtc_has_dp_encoder(crtc_state));

		if (!crtc_state->hw.active)
			continue;

		if (conn_state->commit &&
		    !try_wait_for_completion(&conn_state->commit->hw_done))
			continue;

		*pipe_mask |= BIT(crtc->pipe);
	}
	drm_connector_list_iter_end(&conn_iter);

	if (!intel_dp_needs_link_retrain(intel_dp))
		*pipe_mask = 0;

	return ret;
}

static bool intel_dp_is_connected(struct intel_dp *intel_dp)
{
	struct intel_connector *connector = intel_dp->attached_connector;

	return connector->base.status == connector_status_connected ||
		intel_dp->is_mst;
}

int intel_dp_retrain_link(struct intel_encoder *encoder,
			  struct drm_modeset_acquire_ctx *ctx)
{
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
	struct intel_crtc *crtc;
	u8 pipe_mask;
	int ret;

	if (!intel_dp_is_connected(intel_dp))
		return 0;

	ret = drm_modeset_lock(&dev_priv->drm.mode_config.connection_mutex,
			       ctx);
	if (ret)
		return ret;

	ret = intel_dp_prep_link_retrain(intel_dp, ctx, &pipe_mask);
	if (ret)
		return ret;

	if (pipe_mask == 0)
		return 0;

	drm_dbg_kms(&dev_priv->drm, "[ENCODER:%d:%s] retraining link\n",
		    encoder->base.base.id, encoder->base.name);

	for_each_intel_crtc_in_pipe_mask(&dev_priv->drm, crtc, pipe_mask) {
		const struct intel_crtc_state *crtc_state =
			to_intel_crtc_state(crtc->base.state);

		/* Suppress underruns caused by re-training */
		intel_set_cpu_fifo_underrun_reporting(dev_priv, crtc->pipe, false);
		if (crtc_state->has_pch_encoder)
			intel_set_pch_fifo_underrun_reporting(dev_priv,
							      intel_crtc_pch_transcoder(crtc), false);
	}

	for_each_intel_crtc_in_pipe_mask(&dev_priv->drm, crtc, pipe_mask) {
		const struct intel_crtc_state *crtc_state =
			to_intel_crtc_state(crtc->base.state);

		/* retrain on the MST master transcoder */
		if (DISPLAY_VER(dev_priv) >= 12 &&
		    intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST) &&
		    !intel_dp_mst_is_master_trans(crtc_state))
			continue;

		intel_dp_check_frl_training(intel_dp);
		intel_dp_pcon_dsc_configure(intel_dp, crtc_state);
		intel_dp_start_link_train(intel_dp, crtc_state);
		intel_dp_stop_link_train(intel_dp, crtc_state);
		break;
	}

	for_each_intel_crtc_in_pipe_mask(&dev_priv->drm, crtc, pipe_mask) {
		const struct intel_crtc_state *crtc_state =
			to_intel_crtc_state(crtc->base.state);

		/* Keep underrun reporting disabled until things are stable */
		intel_crtc_wait_for_next_vblank(crtc);

		intel_set_cpu_fifo_underrun_reporting(dev_priv, crtc->pipe, true);
		if (crtc_state->has_pch_encoder)
			intel_set_pch_fifo_underrun_reporting(dev_priv,
							      intel_crtc_pch_transcoder(crtc), true);
	}

	return 0;
}

static int intel_dp_prep_phy_test(struct intel_dp *intel_dp,
				  struct drm_modeset_acquire_ctx *ctx,
				  u8 *pipe_mask)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	struct drm_connector_list_iter conn_iter;
	struct intel_connector *connector;
	int ret = 0;

	*pipe_mask = 0;

	drm_connector_list_iter_begin(&i915->drm, &conn_iter);
	for_each_intel_connector_iter(connector, &conn_iter) {
		struct drm_connector_state *conn_state =
			connector->base.state;
		struct intel_crtc_state *crtc_state;
		struct intel_crtc *crtc;

		if (!intel_dp_has_connector(intel_dp, conn_state))
			continue;

		crtc = to_intel_crtc(conn_state->crtc);
		if (!crtc)
			continue;

		ret = drm_modeset_lock(&crtc->base.mutex, ctx);
		if (ret)
			break;

		crtc_state = to_intel_crtc_state(crtc->base.state);

		drm_WARN_ON(&i915->drm, !intel_crtc_has_dp_encoder(crtc_state));

		if (!crtc_state->hw.active)
			continue;

		if (conn_state->commit &&
		    !try_wait_for_completion(&conn_state->commit->hw_done))
			continue;

		*pipe_mask |= BIT(crtc->pipe);
	}
	drm_connector_list_iter_end(&conn_iter);

	return ret;
}

static int intel_dp_do_phy_test(struct intel_encoder *encoder,
				struct drm_modeset_acquire_ctx *ctx)
{
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
	struct intel_crtc *crtc;
	u8 pipe_mask;
	int ret;

	ret = drm_modeset_lock(&dev_priv->drm.mode_config.connection_mutex,
			       ctx);
	if (ret)
		return ret;

	ret = intel_dp_prep_phy_test(intel_dp, ctx, &pipe_mask);
	if (ret)
		return ret;

	if (pipe_mask == 0)
		return 0;

	drm_dbg_kms(&dev_priv->drm, "[ENCODER:%d:%s] PHY test\n",
		    encoder->base.base.id, encoder->base.name);

	for_each_intel_crtc_in_pipe_mask(&dev_priv->drm, crtc, pipe_mask) {
		const struct intel_crtc_state *crtc_state =
			to_intel_crtc_state(crtc->base.state);

		/* test on the MST master transcoder */
		if (DISPLAY_VER(dev_priv) >= 12 &&
		    intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST) &&
		    !intel_dp_mst_is_master_trans(crtc_state))
			continue;

		intel_dp_process_phy_request(intel_dp, crtc_state);
		break;
	}

	return 0;
}

void intel_dp_phy_test(struct intel_encoder *encoder)
{
	struct drm_modeset_acquire_ctx ctx;
	int ret;

	drm_modeset_acquire_init(&ctx, 0);

	for (;;) {
		ret = intel_dp_do_phy_test(encoder, &ctx);

		if (ret == -EDEADLK) {
			drm_modeset_backoff(&ctx);
			continue;
		}

		break;
	}

	drm_modeset_drop_locks(&ctx);
	drm_modeset_acquire_fini(&ctx);
	drm_WARN(encoder->base.dev, ret,
		 "Acquiring modeset locks failed with %i\n", ret);
}

static void intel_dp_check_device_service_irq(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	u8 val;

	if (intel_dp->dpcd[DP_DPCD_REV] < 0x11)
		return;

	if (drm_dp_dpcd_readb(&intel_dp->aux,
			      DP_DEVICE_SERVICE_IRQ_VECTOR, &val) != 1 || !val)
		return;

	drm_dp_dpcd_writeb(&intel_dp->aux, DP_DEVICE_SERVICE_IRQ_VECTOR, val);

	if (val & DP_AUTOMATED_TEST_REQUEST)
		intel_dp_handle_test_request(intel_dp);

	if (val & DP_CP_IRQ)
		intel_hdcp_handle_cp_irq(intel_dp->attached_connector);

	if (val & DP_SINK_SPECIFIC_IRQ)
		drm_dbg_kms(&i915->drm, "Sink specific irq unhandled\n");
}

static void intel_dp_check_link_service_irq(struct intel_dp *intel_dp)
{
	u8 val;

	if (intel_dp->dpcd[DP_DPCD_REV] < 0x11)
		return;

	if (drm_dp_dpcd_readb(&intel_dp->aux,
			      DP_LINK_SERVICE_IRQ_VECTOR_ESI0, &val) != 1 || !val)
		return;

	if (drm_dp_dpcd_writeb(&intel_dp->aux,
			       DP_LINK_SERVICE_IRQ_VECTOR_ESI0, val) != 1)
		return;

	if (val & HDMI_LINK_STATUS_CHANGED)
		intel_dp_handle_hdmi_link_status_change(intel_dp);
}

/*
 * According to DP spec
 * 5.1.2:
 *  1. Read DPCD
 *  2. Configure link according to Receiver Capabilities
 *  3. Use Link Training from 2.5.3.3 and 3.5.1.3
 *  4. Check link status on receipt of hot-plug interrupt
 *
 * intel_dp_short_pulse -  handles short pulse interrupts
 * when full detection is not required.
 * Returns %true if short pulse is handled and full detection
 * is NOT required and %false otherwise.
 */
static bool
intel_dp_short_pulse(struct intel_dp *intel_dp)
{
	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
	u8 old_sink_count = intel_dp->sink_count;
	bool ret;

	/*
	 * Clearing compliance test variables to allow capturing
	 * of values for next automated test request.
	 */
	memset(&intel_dp->compliance, 0, sizeof(intel_dp->compliance));

	/*
	 * Now read the DPCD to see if it's actually running
	 * If the current value of sink count doesn't match with
	 * the value that was stored earlier or dpcd read failed
	 * we need to do full detection
	 */
	ret = intel_dp_get_dpcd(intel_dp);

	if ((old_sink_count != intel_dp->sink_count) || !ret) {
		/* No need to proceed if we are going to do full detect */
		return false;
	}

	intel_dp_check_device_service_irq(intel_dp);
	intel_dp_check_link_service_irq(intel_dp);

	/* Handle CEC interrupts, if any */
	drm_dp_cec_irq(&intel_dp->aux);

	/* defer to the hotplug work for link retraining if needed */
	if (intel_dp_needs_link_retrain(intel_dp))
		return false;

	intel_psr_short_pulse(intel_dp);

	switch (intel_dp->compliance.test_type) {
	case DP_TEST_LINK_TRAINING:
		drm_dbg_kms(&dev_priv->drm,
			    "Link Training Compliance Test requested\n");
		/* Send a Hotplug Uevent to userspace to start modeset */
		drm_kms_helper_hotplug_event(&dev_priv->drm);
		break;
	case DP_TEST_LINK_PHY_TEST_PATTERN:
		drm_dbg_kms(&dev_priv->drm,
			    "PHY test pattern Compliance Test requested\n");
		/*
		 * Schedule long hpd to do the test
		 *
		 * FIXME get rid of the ad-hoc phy test modeset code
		 * and properly incorporate it into the normal modeset.
		 */
		return false;
	}

	return true;
}

/* XXX this is probably wrong for multiple downstream ports */
static enum drm_connector_status
intel_dp_detect_dpcd(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
	u8 *dpcd = intel_dp->dpcd;
	u8 type;

	if (drm_WARN_ON(&i915->drm, intel_dp_is_edp(intel_dp)))
		return connector_status_connected;

	lspcon_resume(dig_port);

	if (!intel_dp_get_dpcd(intel_dp))
		return connector_status_disconnected;

	/* if there's no downstream port, we're done */
	if (!drm_dp_is_branch(dpcd))
		return connector_status_connected;

	/* If we're HPD-aware, SINK_COUNT changes dynamically */
	if (intel_dp_has_sink_count(intel_dp) &&
	    intel_dp->downstream_ports[0] & DP_DS_PORT_HPD) {
		return intel_dp->sink_count ?
		connector_status_connected : connector_status_disconnected;
	}

	if (intel_dp_can_mst(intel_dp))
		return connector_status_connected;

	/* If no HPD, poke DDC gently */
	if (drm_probe_ddc(&intel_dp->aux.ddc))
		return connector_status_connected;

	/* Well we tried, say unknown for unreliable port types */
	if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) {
		type = intel_dp->downstream_ports[0] & DP_DS_PORT_TYPE_MASK;
		if (type == DP_DS_PORT_TYPE_VGA ||
		    type == DP_DS_PORT_TYPE_NON_EDID)
			return connector_status_unknown;
	} else {
		type = intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
			DP_DWN_STRM_PORT_TYPE_MASK;
		if (type == DP_DWN_STRM_PORT_TYPE_ANALOG ||
		    type == DP_DWN_STRM_PORT_TYPE_OTHER)
			return connector_status_unknown;
	}

	/* Anything else is out of spec, warn and ignore */
	drm_dbg_kms(&i915->drm, "Broken DP branch device, ignoring\n");
	return connector_status_disconnected;
}

static enum drm_connector_status
edp_detect(struct intel_dp *intel_dp)
{
	return connector_status_connected;
}

/*
 * intel_digital_port_connected - is the specified port connected?
 * @encoder: intel_encoder
 *
 * In cases where there's a connector physically connected but it can't be used
 * by our hardware we also return false, since the rest of the driver should
 * pretty much treat the port as disconnected. This is relevant for type-C
 * (starting on ICL) where there's ownership involved.
 *
 * Return %true if port is connected, %false otherwise.
 */
bool intel_digital_port_connected(struct intel_encoder *encoder)
{
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
	struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
	bool is_connected = false;
	intel_wakeref_t wakeref;

	with_intel_display_power(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref)
		is_connected = dig_port->connected(encoder);

	return is_connected;
}

static struct edid *
intel_dp_get_edid(struct intel_dp *intel_dp)
{
	struct intel_connector *intel_connector = intel_dp->attached_connector;

	/* use cached edid if we have one */
	if (intel_connector->edid) {
		/* invalid edid */
		if (IS_ERR(intel_connector->edid))
			return NULL;

		return drm_edid_duplicate(intel_connector->edid);
	} else
		return drm_get_edid(&intel_connector->base,
				    &intel_dp->aux.ddc);
}

static void
intel_dp_update_dfp(struct intel_dp *intel_dp,
		    const struct edid *edid)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	struct intel_connector *connector = intel_dp->attached_connector;

	intel_dp->dfp.max_bpc =
		drm_dp_downstream_max_bpc(intel_dp->dpcd,
					  intel_dp->downstream_ports, edid);

	intel_dp->dfp.max_dotclock =
		drm_dp_downstream_max_dotclock(intel_dp->dpcd,
					       intel_dp->downstream_ports);

	intel_dp->dfp.min_tmds_clock =
		drm_dp_downstream_min_tmds_clock(intel_dp->dpcd,
						 intel_dp->downstream_ports,
						 edid);
	intel_dp->dfp.max_tmds_clock =
		drm_dp_downstream_max_tmds_clock(intel_dp->dpcd,
						 intel_dp->downstream_ports,
						 edid);

	intel_dp->dfp.pcon_max_frl_bw =
		drm_dp_get_pcon_max_frl_bw(intel_dp->dpcd,
					   intel_dp->downstream_ports);

	drm_dbg_kms(&i915->drm,
		    "[CONNECTOR:%d:%s] DFP max bpc %d, max dotclock %d, TMDS clock %d-%d, PCON Max FRL BW %dGbps\n",
		    connector->base.base.id, connector->base.name,
		    intel_dp->dfp.max_bpc,
		    intel_dp->dfp.max_dotclock,
		    intel_dp->dfp.min_tmds_clock,
		    intel_dp->dfp.max_tmds_clock,
		    intel_dp->dfp.pcon_max_frl_bw);

	intel_dp_get_pcon_dsc_cap(intel_dp);
}

static void
intel_dp_update_420(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	struct intel_connector *connector = intel_dp->attached_connector;
	bool is_branch, ycbcr_420_passthrough, ycbcr_444_to_420, rgb_to_ycbcr;

	/* No YCbCr output support on gmch platforms */
	if (HAS_GMCH(i915))
		return;

	/*
	 * ILK doesn't seem capable of DP YCbCr output. The
	 * displayed image is severly corrupted. SNB+ is fine.
	 */
	if (IS_IRONLAKE(i915))
		return;

	is_branch = drm_dp_is_branch(intel_dp->dpcd);
	ycbcr_420_passthrough =
		drm_dp_downstream_420_passthrough(intel_dp->dpcd,
						  intel_dp->downstream_ports);
	/* on-board LSPCON always assumed to support 4:4:4->4:2:0 conversion */
	ycbcr_444_to_420 =
		dp_to_dig_port(intel_dp)->lspcon.active ||
		drm_dp_downstream_444_to_420_conversion(intel_dp->dpcd,
							intel_dp->downstream_ports);
	rgb_to_ycbcr = drm_dp_downstream_rgb_to_ycbcr_conversion(intel_dp->dpcd,
								 intel_dp->downstream_ports,
								 DP_DS_HDMI_BT709_RGB_YCBCR_CONV);

	if (DISPLAY_VER(i915) >= 11) {
		/* Let PCON convert from RGB->YCbCr if possible */
		if (is_branch && rgb_to_ycbcr && ycbcr_444_to_420) {
			intel_dp->dfp.rgb_to_ycbcr = true;
			intel_dp->dfp.ycbcr_444_to_420 = true;
			connector->base.ycbcr_420_allowed = true;
		} else {
		/* Prefer 4:2:0 passthrough over 4:4:4->4:2:0 conversion */
			intel_dp->dfp.ycbcr_444_to_420 =
				ycbcr_444_to_420 && !ycbcr_420_passthrough;

			connector->base.ycbcr_420_allowed =
				!is_branch || ycbcr_444_to_420 || ycbcr_420_passthrough;
		}
	} else {
		/* 4:4:4->4:2:0 conversion is the only way */
		intel_dp->dfp.ycbcr_444_to_420 = ycbcr_444_to_420;

		connector->base.ycbcr_420_allowed = ycbcr_444_to_420;
	}

	drm_dbg_kms(&i915->drm,
		    "[CONNECTOR:%d:%s] RGB->YcbCr conversion? %s, YCbCr 4:2:0 allowed? %s, YCbCr 4:4:4->4:2:0 conversion? %s\n",
		    connector->base.base.id, connector->base.name,
		    str_yes_no(intel_dp->dfp.rgb_to_ycbcr),
		    str_yes_no(connector->base.ycbcr_420_allowed),
		    str_yes_no(intel_dp->dfp.ycbcr_444_to_420));
}

static void
intel_dp_set_edid(struct intel_dp *intel_dp)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	struct intel_connector *connector = intel_dp->attached_connector;
	struct edid *edid;
	bool vrr_capable;

	intel_dp_unset_edid(intel_dp);
	edid = intel_dp_get_edid(intel_dp);
	connector->detect_edid = edid;

	vrr_capable = intel_vrr_is_capable(connector);
	drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] VRR capable: %s\n",
		    connector->base.base.id, connector->base.name, str_yes_no(vrr_capable));
	drm_connector_set_vrr_capable_property(&connector->base, vrr_capable);

	intel_dp_update_dfp(intel_dp, edid);
	intel_dp_update_420(intel_dp);

	if (edid && edid->input & DRM_EDID_INPUT_DIGITAL) {
		intel_dp->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
		intel_dp->has_audio = drm_detect_monitor_audio(edid);
	}

	drm_dp_cec_set_edid(&intel_dp->aux, edid);
}

static void
intel_dp_unset_edid(struct intel_dp *intel_dp)
{
	struct intel_connector *connector = intel_dp->attached_connector;

	drm_dp_cec_unset_edid(&intel_dp->aux);
	kfree(connector->detect_edid);
	connector->detect_edid = NULL;

	intel_dp->has_hdmi_sink = false;
	intel_dp->has_audio = false;

	intel_dp->dfp.max_bpc = 0;
	intel_dp->dfp.max_dotclock = 0;
	intel_dp->dfp.min_tmds_clock = 0;
	intel_dp->dfp.max_tmds_clock = 0;

	intel_dp->dfp.pcon_max_frl_bw = 0;

	intel_dp->dfp.ycbcr_444_to_420 = false;
	connector->base.ycbcr_420_allowed = false;

	drm_connector_set_vrr_capable_property(&connector->base,
					       false);
}

static int
intel_dp_detect(struct drm_connector *connector,
		struct drm_modeset_acquire_ctx *ctx,
		bool force)
{
	struct drm_i915_private *dev_priv = to_i915(connector->dev);
	struct intel_dp *intel_dp = intel_attached_dp(to_intel_connector(connector));
	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
	struct intel_encoder *encoder = &dig_port->base;
	enum drm_connector_status status;

	drm_dbg_kms(&dev_priv->drm, "[CONNECTOR:%d:%s]\n",
		    connector->base.id, connector->name);
	drm_WARN_ON(&dev_priv->drm,
		    !drm_modeset_is_locked(&dev_priv->drm.mode_config.connection_mutex));

	if (!INTEL_DISPLAY_ENABLED(dev_priv))
		return connector_status_disconnected;

	/* Can't disconnect eDP */
	if (intel_dp_is_edp(intel_dp))
		status = edp_detect(intel_dp);
	else if (intel_digital_port_connected(encoder))
		status = intel_dp_detect_dpcd(intel_dp);
	else
		status = connector_status_disconnected;

	if (status == connector_status_disconnected) {
		memset(&intel_dp->compliance, 0, sizeof(intel_dp->compliance));
		memset(intel_dp->dsc_dpcd, 0, sizeof(intel_dp->dsc_dpcd));

		if (intel_dp->is_mst) {
			drm_dbg_kms(&dev_priv->drm,
				    "MST device may have disappeared %d vs %d\n",
				    intel_dp->is_mst,
				    intel_dp->mst_mgr.mst_state);
			intel_dp->is_mst = false;
			drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
							intel_dp->is_mst);
		}

		goto out;
	}

	/* Read DP Sink DSC Cap DPCD regs for DP v1.4 */
	if (DISPLAY_VER(dev_priv) >= 11)
		intel_dp_get_dsc_sink_cap(intel_dp);

	intel_dp_configure_mst(intel_dp);

	/*
	 * TODO: Reset link params when switching to MST mode, until MST
	 * supports link training fallback params.
	 */
	if (intel_dp->reset_link_params || intel_dp->is_mst) {
		intel_dp_reset_max_link_params(intel_dp);
		intel_dp->reset_link_params = false;
	}

	intel_dp_print_rates(intel_dp);

	if (intel_dp->is_mst) {
		/*
		 * If we are in MST mode then this connector
		 * won't appear connected or have anything
		 * with EDID on it
		 */
		status = connector_status_disconnected;
		goto out;
	}

	/*
	 * Some external monitors do not signal loss of link synchronization
	 * with an IRQ_HPD, so force a link status check.
	 */
	if (!intel_dp_is_edp(intel_dp)) {
		int ret;

		ret = intel_dp_retrain_link(encoder, ctx);
		if (ret)
			return ret;
	}

	/*
	 * Clearing NACK and defer counts to get their exact values
	 * while reading EDID which are required by Compliance tests
	 * 4.2.2.4 and 4.2.2.5
	 */
	intel_dp->aux.i2c_nack_count = 0;
	intel_dp->aux.i2c_defer_count = 0;

	intel_dp_set_edid(intel_dp);
	if (intel_dp_is_edp(intel_dp) ||
	    to_intel_connector(connector)->detect_edid)
		status = connector_status_connected;

	intel_dp_check_device_service_irq(intel_dp);

out:
	if (status != connector_status_connected && !intel_dp->is_mst)
		intel_dp_unset_edid(intel_dp);

	/*
	 * Make sure the refs for power wells enabled during detect are
	 * dropped to avoid a new detect cycle triggered by HPD polling.
	 */
	intel_display_power_flush_work(dev_priv);

	if (!intel_dp_is_edp(intel_dp))
		drm_dp_set_subconnector_property(connector,
						 status,
						 intel_dp->dpcd,
						 intel_dp->downstream_ports);
	return status;
}

static void
intel_dp_force(struct drm_connector *connector)
{
	struct intel_dp *intel_dp = intel_attached_dp(to_intel_connector(connector));
	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
	struct intel_encoder *intel_encoder = &dig_port->base;
	struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
	enum intel_display_power_domain aux_domain =
		intel_aux_power_domain(dig_port);
	intel_wakeref_t wakeref;

	drm_dbg_kms(&dev_priv->drm, "[CONNECTOR:%d:%s]\n",
		    connector->base.id, connector->name);
	intel_dp_unset_edid(intel_dp);

	if (connector->status != connector_status_connected)
		return;

	wakeref = intel_display_power_get(dev_priv, aux_domain);

	intel_dp_set_edid(intel_dp);

	intel_display_power_put(dev_priv, aux_domain, wakeref);
}

static int intel_dp_get_modes(struct drm_connector *connector)
{
	struct intel_connector *intel_connector = to_intel_connector(connector);
	struct edid *edid;
	int num_modes = 0;

	edid = intel_connector->detect_edid;
	if (edid)
		num_modes = intel_connector_update_modes(connector, edid);

	/* Also add fixed mode, which may or may not be present in EDID */
	if (intel_dp_is_edp(intel_attached_dp(intel_connector)))
		num_modes += intel_panel_get_modes(intel_connector);

	if (num_modes)
		return num_modes;

	if (!edid) {
		struct intel_dp *intel_dp = intel_attached_dp(intel_connector);
		struct drm_display_mode *mode;

		mode = drm_dp_downstream_mode(connector->dev,
					      intel_dp->dpcd,
					      intel_dp->downstream_ports);
		if (mode) {
			drm_mode_probed_add(connector, mode);
			num_modes++;
		}
	}

	return num_modes;
}

static int
intel_dp_connector_register(struct drm_connector *connector)
{
	struct drm_i915_private *i915 = to_i915(connector->dev);
	struct intel_dp *intel_dp = intel_attached_dp(to_intel_connector(connector));
	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
	struct intel_lspcon *lspcon = &dig_port->lspcon;
	int ret;

	ret = intel_connector_register(connector);
	if (ret)
		return ret;

	drm_dbg_kms(&i915->drm, "registering %s bus for %s\n",
		    intel_dp->aux.name, connector->kdev->kobj.name);

	intel_dp->aux.dev = connector->kdev;
	ret = drm_dp_aux_register(&intel_dp->aux);
	if (!ret)
		drm_dp_cec_register_connector(&intel_dp->aux, connector);

	if (!intel_bios_is_lspcon_present(i915, dig_port->base.port))
		return ret;

	/*
	 * ToDo: Clean this up to handle lspcon init and resume more
	 * efficiently and streamlined.
	 */
	if (lspcon_init(dig_port)) {
		lspcon_detect_hdr_capability(lspcon);
		if (lspcon->hdr_supported)
			drm_connector_attach_hdr_output_metadata_property(connector);
	}

	return ret;
}

static void
intel_dp_connector_unregister(struct drm_connector *connector)
{
	struct intel_dp *intel_dp = intel_attached_dp(to_intel_connector(connector));

	drm_dp_cec_unregister_connector(&intel_dp->aux);
	drm_dp_aux_unregister(&intel_dp->aux);
	intel_connector_unregister(connector);
}

void intel_dp_encoder_flush_work(struct drm_encoder *encoder)
{
	struct intel_digital_port *dig_port = enc_to_dig_port(to_intel_encoder(encoder));
	struct intel_dp *intel_dp = &dig_port->dp;

	intel_dp_mst_encoder_cleanup(dig_port);

	intel_pps_vdd_off_sync(intel_dp);

	/*
	 * Ensure power off delay is respected on module remove, so that we can
	 * reduce delays at driver probe. See pps_init_timestamps().
	 */
	intel_pps_wait_power_cycle(intel_dp);

	intel_dp_aux_fini(intel_dp);
}

void intel_dp_encoder_suspend(struct intel_encoder *intel_encoder)
{
	struct intel_dp *intel_dp = enc_to_intel_dp(intel_encoder);

	intel_pps_vdd_off_sync(intel_dp);
}

void intel_dp_encoder_shutdown(struct intel_encoder *intel_encoder)
{
	struct intel_dp *intel_dp = enc_to_intel_dp(intel_encoder);

	intel_pps_wait_power_cycle(intel_dp);
}

static int intel_modeset_tile_group(struct intel_atomic_state *state,
				    int tile_group_id)
{
	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
	struct drm_connector_list_iter conn_iter;
	struct drm_connector *connector;
	int ret = 0;

	drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
	drm_for_each_connector_iter(connector, &conn_iter) {
		struct drm_connector_state *conn_state;
		struct intel_crtc_state *crtc_state;
		struct intel_crtc *crtc;

		if (!connector->has_tile ||
		    connector->tile_group->id != tile_group_id)
			continue;

		conn_state = drm_atomic_get_connector_state(&state->base,
							    connector);
		if (IS_ERR(conn_state)) {
			ret = PTR_ERR(conn_state);
			break;
		}

		crtc = to_intel_crtc(conn_state->crtc);

		if (!crtc)
			continue;

		crtc_state = intel_atomic_get_new_crtc_state(state, crtc);
		crtc_state->uapi.mode_changed = true;

		ret = drm_atomic_add_affected_planes(&state->base, &crtc->base);
		if (ret)
			break;
	}
	drm_connector_list_iter_end(&conn_iter);

	return ret;
}

static int intel_modeset_affected_transcoders(struct intel_atomic_state *state, u8 transcoders)
{
	struct drm_i915_private *dev_priv = to_i915(state->base.dev);
	struct intel_crtc *crtc;

	if (transcoders == 0)
		return 0;

	for_each_intel_crtc(&dev_priv->drm, crtc) {
		struct intel_crtc_state *crtc_state;
		int ret;

		crtc_state = intel_atomic_get_crtc_state(&state->base, crtc);
		if (IS_ERR(crtc_state))
			return PTR_ERR(crtc_state);

		if (!crtc_state->hw.enable)
			continue;

		if (!(transcoders & BIT(crtc_state->cpu_transcoder)))
			continue;

		crtc_state->uapi.mode_changed = true;

		ret = drm_atomic_add_affected_connectors(&state->base, &crtc->base);
		if (ret)
			return ret;

		ret = drm_atomic_add_affected_planes(&state->base, &crtc->base);
		if (ret)
			return ret;

		transcoders &= ~BIT(crtc_state->cpu_transcoder);
	}

	drm_WARN_ON(&dev_priv->drm, transcoders != 0);

	return 0;
}

static int intel_modeset_synced_crtcs(struct intel_atomic_state *state,
				      struct drm_connector *connector)
{
	const struct drm_connector_state *old_conn_state =
		drm_atomic_get_old_connector_state(&state->base, connector);
	const struct intel_crtc_state *old_crtc_state;
	struct intel_crtc *crtc;
	u8 transcoders;

	crtc = to_intel_crtc(old_conn_state->crtc);
	if (!crtc)
		return 0;

	old_crtc_state = intel_atomic_get_old_crtc_state(state, crtc);

	if (!old_crtc_state->hw.active)
		return 0;

	transcoders = old_crtc_state->sync_mode_slaves_mask;
	if (old_crtc_state->master_transcoder != INVALID_TRANSCODER)
		transcoders |= BIT(old_crtc_state->master_transcoder);

	return intel_modeset_affected_transcoders(state,
						  transcoders);
}

static int intel_dp_connector_atomic_check(struct drm_connector *conn,
					   struct drm_atomic_state *_state)
{
	struct drm_i915_private *dev_priv = to_i915(conn->dev);
	struct intel_atomic_state *state = to_intel_atomic_state(_state);
	struct drm_connector_state *conn_state = drm_atomic_get_new_connector_state(_state, conn);
	struct intel_connector *intel_conn = to_intel_connector(conn);
	struct intel_dp *intel_dp = enc_to_intel_dp(intel_conn->encoder);
	int ret;

	ret = intel_digital_connector_atomic_check(conn, &state->base);
	if (ret)
		return ret;

	if (intel_dp_mst_source_support(intel_dp)) {
		ret = drm_dp_mst_root_conn_atomic_check(conn_state, &intel_dp->mst_mgr);
		if (ret)
			return ret;
	}

	/*
	 * We don't enable port sync on BDW due to missing w/as and
	 * due to not having adjusted the modeset sequence appropriately.
	 */
	if (DISPLAY_VER(dev_priv) < 9)
		return 0;

	if (!intel_connector_needs_modeset(state, conn))
		return 0;

	if (conn->has_tile) {
		ret = intel_modeset_tile_group(state, conn->tile_group->id);
		if (ret)
			return ret;
	}

	return intel_modeset_synced_crtcs(state, conn);
}

static void intel_dp_oob_hotplug_event(struct drm_connector *connector)
{
	struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector));
	struct drm_i915_private *i915 = to_i915(connector->dev);

	spin_lock_irq(&i915->irq_lock);
	i915->display.hotplug.event_bits |= BIT(encoder->hpd_pin);
	spin_unlock_irq(&i915->irq_lock);
	queue_delayed_work(system_wq, &i915->display.hotplug.hotplug_work, 0);
}

static const struct drm_connector_funcs intel_dp_connector_funcs = {
	.force = intel_dp_force,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.atomic_get_property = intel_digital_connector_atomic_get_property,
	.atomic_set_property = intel_digital_connector_atomic_set_property,
	.late_register = intel_dp_connector_register,
	.early_unregister = intel_dp_connector_unregister,
	.destroy = intel_connector_destroy,
	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
	.atomic_duplicate_state = intel_digital_connector_duplicate_state,
	.oob_hotplug_event = intel_dp_oob_hotplug_event,
};

static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = {
	.detect_ctx = intel_dp_detect,
	.get_modes = intel_dp_get_modes,
	.mode_valid = intel_dp_mode_valid,
	.atomic_check = intel_dp_connector_atomic_check,
};

enum irqreturn
intel_dp_hpd_pulse(struct intel_digital_port *dig_port, bool long_hpd)
{
	struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
	struct intel_dp *intel_dp = &dig_port->dp;

	if (dig_port->base.type == INTEL_OUTPUT_EDP &&
	    (long_hpd || !intel_pps_have_panel_power_or_vdd(intel_dp))) {
		/*
		 * vdd off can generate a long/short pulse on eDP which
		 * would require vdd on to handle it, and thus we
		 * would end up in an endless cycle of
		 * "vdd off -> long/short hpd -> vdd on -> detect -> vdd off -> ..."
		 */
		drm_dbg_kms(&i915->drm,
			    "ignoring %s hpd on eDP [ENCODER:%d:%s]\n",
			    long_hpd ? "long" : "short",
			    dig_port->base.base.base.id,
			    dig_port->base.base.name);
		return IRQ_HANDLED;
	}

	drm_dbg_kms(&i915->drm, "got hpd irq on [ENCODER:%d:%s] - %s\n",
		    dig_port->base.base.base.id,
		    dig_port->base.base.name,
		    long_hpd ? "long" : "short");

	if (long_hpd) {
		intel_dp->reset_link_params = true;
		return IRQ_NONE;
	}

	if (intel_dp->is_mst) {
		if (!intel_dp_check_mst_status(intel_dp))
			return IRQ_NONE;
	} else if (!intel_dp_short_pulse(intel_dp)) {
		return IRQ_NONE;
	}

	return IRQ_HANDLED;
}

/* check the VBT to see whether the eDP is on another port */
bool intel_dp_is_port_edp(struct drm_i915_private *dev_priv, enum port port)
{
	/*
	 * eDP not supported on g4x. so bail out early just
	 * for a bit extra safety in case the VBT is bonkers.
	 */
	if (DISPLAY_VER(dev_priv) < 5)
		return false;

	if (DISPLAY_VER(dev_priv) < 9 && port == PORT_A)
		return true;

	return intel_bios_is_port_edp(dev_priv, port);
}

static bool
has_gamut_metadata_dip(struct drm_i915_private *i915, enum port port)
{
	if (intel_bios_is_lspcon_present(i915, port))
		return false;

	if (DISPLAY_VER(i915) >= 11)
		return true;

	if (port == PORT_A)
		return false;

	if (IS_HASWELL(i915) || IS_BROADWELL(i915) ||
	    DISPLAY_VER(i915) >= 9)
		return true;

	return false;
}

static void
intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->dev);
	enum port port = dp_to_dig_port(intel_dp)->base.port;

	if (!intel_dp_is_edp(intel_dp))
		drm_connector_attach_dp_subconnector_property(connector);

	if (!IS_G4X(dev_priv) && port != PORT_A)
		intel_attach_force_audio_property(connector);

	intel_attach_broadcast_rgb_property(connector);
	if (HAS_GMCH(dev_priv))
		drm_connector_attach_max_bpc_property(connector, 6, 10);
	else if (DISPLAY_VER(dev_priv) >= 5)
		drm_connector_attach_max_bpc_property(connector, 6, 12);

	/* Register HDMI colorspace for case of lspcon */
	if (intel_bios_is_lspcon_present(dev_priv, port)) {
		drm_connector_attach_content_type_property(connector);
		intel_attach_hdmi_colorspace_property(connector);
	} else {
		intel_attach_dp_colorspace_property(connector);
	}

	if (has_gamut_metadata_dip(dev_priv, port))
		drm_connector_attach_hdr_output_metadata_property(connector);

	if (HAS_VRR(dev_priv))
		drm_connector_attach_vrr_capable_property(connector);
}

static void
intel_edp_add_properties(struct intel_dp *intel_dp)
{
	struct intel_connector *connector = intel_dp->attached_connector;
	struct drm_i915_private *i915 = to_i915(connector->base.dev);
	const struct drm_display_mode *fixed_mode =
		intel_panel_preferred_fixed_mode(connector);

	intel_attach_scaling_mode_property(&connector->base);

	drm_connector_set_panel_orientation_with_quirk(&connector->base,
						       i915->display.vbt.orientation,
						       fixed_mode->hdisplay,
						       fixed_mode->vdisplay);
}

static void intel_edp_backlight_setup(struct intel_dp *intel_dp,
				      struct intel_connector *connector)
{
	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
	enum pipe pipe = INVALID_PIPE;

	if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) {
		/*
		 * Figure out the current pipe for the initial backlight setup.
		 * If the current pipe isn't valid, try the PPS pipe, and if that
		 * fails just assume pipe A.
		 */
		pipe = vlv_active_pipe(intel_dp);

		if (pipe != PIPE_A && pipe != PIPE_B)
			pipe = intel_dp->pps.pps_pipe;

		if (pipe != PIPE_A && pipe != PIPE_B)
			pipe = PIPE_A;

		drm_dbg_kms(&i915->drm,
			    "[CONNECTOR:%d:%s] using pipe %c for initial backlight setup\n",
			    connector->base.base.id, connector->base.name,
			    pipe_name(pipe));
	}

	intel_backlight_setup(connector, pipe);
}

static bool intel_edp_init_connector(struct intel_dp *intel_dp,
				     struct intel_connector *intel_connector)
{
	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
	struct drm_connector *connector = &intel_connector->base;
	struct drm_display_mode *fixed_mode;
	struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
	bool has_dpcd;
	struct edid *edid;

	if (!intel_dp_is_edp(intel_dp))
		return true;

	/*
	 * On IBX/CPT we may get here with LVDS already registered. Since the
	 * driver uses the only internal power sequencer available for both
	 * eDP and LVDS bail out early in this case to prevent interfering
	 * with an already powered-on LVDS power sequencer.
	 */
	if (intel_get_lvds_encoder(dev_priv)) {
		drm_WARN_ON(&dev_priv->drm,
			    !(HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)));
		drm_info(&dev_priv->drm,
			 "LVDS was detected, not registering eDP\n");

		return false;
	}

	intel_pps_init(intel_dp);

	/* Cache DPCD and EDID for edp. */
	has_dpcd = intel_edp_init_dpcd(intel_dp);

	if (!has_dpcd) {
		/* if this fails, presume the device is a ghost */
		drm_info(&dev_priv->drm,
			 "[ENCODER:%d:%s] failed to retrieve link info, disabling eDP\n",
			 encoder->base.base.id, encoder->base.name);
		goto out_vdd_off;
	}

	mutex_lock(&dev_priv->drm.mode_config.mutex);
	edid = drm_get_edid(connector, &intel_dp->aux.ddc);
	if (!edid) {
		/* Fallback to EDID from ACPI OpRegion, if any */
		edid = intel_opregion_get_edid(intel_connector);
		if (edid)
			drm_dbg_kms(&dev_priv->drm,
				    "[CONNECTOR:%d:%s] Using OpRegion EDID\n",
				    connector->base.id, connector->name);
	}
	if (edid) {
		if (drm_add_edid_modes(connector, edid)) {
			drm_connector_update_edid_property(connector, edid);
		} else {
			kfree(edid);
			edid = ERR_PTR(-EINVAL);
		}
	} else {
		edid = ERR_PTR(-ENOENT);
	}
	intel_connector->edid = edid;

	intel_bios_init_panel(dev_priv, &intel_connector->panel,
			      encoder->devdata, IS_ERR(edid) ? NULL : edid);

	intel_panel_add_edid_fixed_modes(intel_connector, true);

	/* MSO requires information from the EDID */
	intel_edp_mso_init(intel_dp);

	/* multiply the mode clock and horizontal timings for MSO */
	list_for_each_entry(fixed_mode, &intel_connector->panel.fixed_modes, head)
		intel_edp_mso_mode_fixup(intel_connector, fixed_mode);

	/* fallback to VBT if available for eDP */
	if (!intel_panel_preferred_fixed_mode(intel_connector))
		intel_panel_add_vbt_lfp_fixed_mode(intel_connector);

	mutex_unlock(&dev_priv->drm.mode_config.mutex);

	if (!intel_panel_preferred_fixed_mode(intel_connector)) {
		drm_info(&dev_priv->drm,
			 "[ENCODER:%d:%s] failed to find fixed mode for the panel, disabling eDP\n",
			 encoder->base.base.id, encoder->base.name);
		goto out_vdd_off;
	}

	intel_panel_init(intel_connector);

	intel_edp_backlight_setup(intel_dp, intel_connector);

	intel_edp_add_properties(intel_dp);

	intel_pps_init_late(intel_dp);

	return true;

out_vdd_off:
	intel_pps_vdd_off_sync(intel_dp);

	return false;
}

static void intel_dp_modeset_retry_work_fn(struct work_struct *work)
{
	struct intel_connector *intel_connector;
	struct drm_connector *connector;

	intel_connector = container_of(work, typeof(*intel_connector),
				       modeset_retry_work);
	connector = &intel_connector->base;
	drm_dbg_kms(connector->dev, "[CONNECTOR:%d:%s]\n", connector->base.id,
		    connector->name);

	/* Grab the locks before changing connector property*/
	mutex_lock(&connector->dev->mode_config.mutex);
	/* Set connector link status to BAD and send a Uevent to notify
	 * userspace to do a modeset.
	 */
	drm_connector_set_link_status_property(connector,
					       DRM_MODE_LINK_STATUS_BAD);
	mutex_unlock(&connector->dev->mode_config.mutex);
	/* Send Hotplug uevent so userspace can reprobe */
	drm_kms_helper_connector_hotplug_event(connector);
}

bool
intel_dp_init_connector(struct intel_digital_port *dig_port,
			struct intel_connector *intel_connector)
{
	struct drm_connector *connector = &intel_connector->base;
	struct intel_dp *intel_dp = &dig_port->dp;
	struct intel_encoder *intel_encoder = &dig_port->base;
	struct drm_device *dev = intel_encoder->base.dev;
	struct drm_i915_private *dev_priv = to_i915(dev);
	enum port port = intel_encoder->port;
	enum phy phy = intel_port_to_phy(dev_priv, port);
	int type;

	/* Initialize the work for modeset in case of link train failure */
	INIT_WORK(&intel_connector->modeset_retry_work,
		  intel_dp_modeset_retry_work_fn);

	if (drm_WARN(dev, dig_port->max_lanes < 1,
		     "Not enough lanes (%d) for DP on [ENCODER:%d:%s]\n",
		     dig_port->max_lanes, intel_encoder->base.base.id,
		     intel_encoder->base.name))
		return false;

	intel_dp->reset_link_params = true;
	intel_dp->pps.pps_pipe = INVALID_PIPE;
	intel_dp->pps.active_pipe = INVALID_PIPE;

	/* Preserve the current hw state. */
	intel_dp->DP = intel_de_read(dev_priv, intel_dp->output_reg);
	intel_dp->attached_connector = intel_connector;

	if (intel_dp_is_port_edp(dev_priv, port)) {
		/*
		 * Currently we don't support eDP on TypeC ports, although in
		 * theory it could work on TypeC legacy ports.
		 */
		drm_WARN_ON(dev, intel_phy_is_tc(dev_priv, phy));
		type = DRM_MODE_CONNECTOR_eDP;
		intel_encoder->type = INTEL_OUTPUT_EDP;

		/* eDP only on port B and/or C on vlv/chv */
		if (drm_WARN_ON(dev, (IS_VALLEYVIEW(dev_priv) ||
				      IS_CHERRYVIEW(dev_priv)) &&
				port != PORT_B && port != PORT_C))
			return false;
	} else {
		type = DRM_MODE_CONNECTOR_DisplayPort;
	}

	intel_dp_set_default_sink_rates(intel_dp);
	intel_dp_set_default_max_sink_lane_count(intel_dp);

	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
		intel_dp->pps.active_pipe = vlv_active_pipe(intel_dp);

	drm_dbg_kms(&dev_priv->drm,
		    "Adding %s connector on [ENCODER:%d:%s]\n",
		    type == DRM_MODE_CONNECTOR_eDP ? "eDP" : "DP",
		    intel_encoder->base.base.id, intel_encoder->base.name);

	drm_connector_init(dev, connector, &intel_dp_connector_funcs, type);
	drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs);

	if (!HAS_GMCH(dev_priv))
		connector->interlace_allowed = true;

	intel_connector->polled = DRM_CONNECTOR_POLL_HPD;

	intel_dp_aux_init(intel_dp);

	intel_connector_attach_encoder(intel_connector, intel_encoder);

	if (HAS_DDI(dev_priv))
		intel_connector->get_hw_state = intel_ddi_connector_get_hw_state;
	else
		intel_connector->get_hw_state = intel_connector_get_hw_state;

	if (!intel_edp_init_connector(intel_dp, intel_connector)) {
		intel_dp_aux_fini(intel_dp);
		goto fail;
	}

	intel_dp_set_source_rates(intel_dp);
	intel_dp_set_common_rates(intel_dp);
	intel_dp_reset_max_link_params(intel_dp);

	/* init MST on ports that can support it */
	intel_dp_mst_encoder_init(dig_port,
				  intel_connector->base.base.id);

	intel_dp_add_properties(intel_dp, connector);

	if (is_hdcp_supported(dev_priv, port) && !intel_dp_is_edp(intel_dp)) {
		int ret = intel_dp_hdcp_init(dig_port, intel_connector);
		if (ret)
			drm_dbg_kms(&dev_priv->drm,
				    "HDCP init failed, skipping.\n");
	}

	/* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
	 * 0xd.  Failure to do so will result in spurious interrupts being
	 * generated on the port when a cable is not attached.
	 */
	if (IS_G45(dev_priv)) {
		u32 temp = intel_de_read(dev_priv, PEG_BAND_GAP_DATA);
		intel_de_write(dev_priv, PEG_BAND_GAP_DATA,
			       (temp & ~0xf) | 0xd);
	}

	intel_dp->frl.is_trained = false;
	intel_dp->frl.trained_rate_gbps = 0;

	intel_psr_init(intel_dp);

	return true;

fail:
	drm_connector_cleanup(connector);

	return false;
}

void intel_dp_mst_suspend(struct drm_i915_private *dev_priv)
{
	struct intel_encoder *encoder;

	if (!HAS_DISPLAY(dev_priv))
		return;

	for_each_intel_encoder(&dev_priv->drm, encoder) {
		struct intel_dp *intel_dp;

		if (encoder->type != INTEL_OUTPUT_DDI)
			continue;

		intel_dp = enc_to_intel_dp(encoder);

		if (!intel_dp_mst_source_support(intel_dp))
			continue;

		if (intel_dp->is_mst)
			drm_dp_mst_topology_mgr_suspend(&intel_dp->mst_mgr);
	}
}

void intel_dp_mst_resume(struct drm_i915_private *dev_priv)
{
	struct intel_encoder *encoder;

	if (!HAS_DISPLAY(dev_priv))
		return;

	for_each_intel_encoder(&dev_priv->drm, encoder) {
		struct intel_dp *intel_dp;
		int ret;

		if (encoder->type != INTEL_OUTPUT_DDI)
			continue;

		intel_dp = enc_to_intel_dp(encoder);

		if (!intel_dp_mst_source_support(intel_dp))
			continue;

		ret = drm_dp_mst_topology_mgr_resume(&intel_dp->mst_mgr,
						     true);
		if (ret) {
			intel_dp->is_mst = false;
			drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
							false);
		}
	}
}