aboutsummaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/radeon/radeon_display.c
blob: 913fafa597ad210180c03e03618002a702cda441 (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
/*
 * Copyright 2007-8 Advanced Micro Devices, Inc.
 * Copyright 2008 Red Hat Inc.
 *
 * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: Dave Airlie
 *          Alex Deucher
 */
#include <drm/drmP.h>
#include <drm/radeon_drm.h>
#include "radeon.h"

#include "atom.h"
#include <asm/div64.h>

#include <linux/pm_runtime.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_edid.h>

#include <linux/gcd.h>

static void avivo_crtc_load_lut(struct drm_crtc *crtc)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	int i;

	DRM_DEBUG_KMS("%d\n", radeon_crtc->crtc_id);
	WREG32(AVIVO_DC_LUTA_CONTROL + radeon_crtc->crtc_offset, 0);

	WREG32(AVIVO_DC_LUTA_BLACK_OFFSET_BLUE + radeon_crtc->crtc_offset, 0);
	WREG32(AVIVO_DC_LUTA_BLACK_OFFSET_GREEN + radeon_crtc->crtc_offset, 0);
	WREG32(AVIVO_DC_LUTA_BLACK_OFFSET_RED + radeon_crtc->crtc_offset, 0);

	WREG32(AVIVO_DC_LUTA_WHITE_OFFSET_BLUE + radeon_crtc->crtc_offset, 0xffff);
	WREG32(AVIVO_DC_LUTA_WHITE_OFFSET_GREEN + radeon_crtc->crtc_offset, 0xffff);
	WREG32(AVIVO_DC_LUTA_WHITE_OFFSET_RED + radeon_crtc->crtc_offset, 0xffff);

	WREG32(AVIVO_DC_LUT_RW_SELECT, radeon_crtc->crtc_id);
	WREG32(AVIVO_DC_LUT_RW_MODE, 0);
	WREG32(AVIVO_DC_LUT_WRITE_EN_MASK, 0x0000003f);

	WREG8(AVIVO_DC_LUT_RW_INDEX, 0);
	for (i = 0; i < 256; i++) {
		WREG32(AVIVO_DC_LUT_30_COLOR,
			     (radeon_crtc->lut_r[i] << 20) |
			     (radeon_crtc->lut_g[i] << 10) |
			     (radeon_crtc->lut_b[i] << 0));
	}

	/* Only change bit 0 of LUT_SEL, other bits are set elsewhere */
	WREG32_P(AVIVO_D1GRPH_LUT_SEL + radeon_crtc->crtc_offset, radeon_crtc->crtc_id, ~1);
}

static void dce4_crtc_load_lut(struct drm_crtc *crtc)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	int i;

	DRM_DEBUG_KMS("%d\n", radeon_crtc->crtc_id);
	WREG32(EVERGREEN_DC_LUT_CONTROL + radeon_crtc->crtc_offset, 0);

	WREG32(EVERGREEN_DC_LUT_BLACK_OFFSET_BLUE + radeon_crtc->crtc_offset, 0);
	WREG32(EVERGREEN_DC_LUT_BLACK_OFFSET_GREEN + radeon_crtc->crtc_offset, 0);
	WREG32(EVERGREEN_DC_LUT_BLACK_OFFSET_RED + radeon_crtc->crtc_offset, 0);

	WREG32(EVERGREEN_DC_LUT_WHITE_OFFSET_BLUE + radeon_crtc->crtc_offset, 0xffff);
	WREG32(EVERGREEN_DC_LUT_WHITE_OFFSET_GREEN + radeon_crtc->crtc_offset, 0xffff);
	WREG32(EVERGREEN_DC_LUT_WHITE_OFFSET_RED + radeon_crtc->crtc_offset, 0xffff);

	WREG32(EVERGREEN_DC_LUT_RW_MODE + radeon_crtc->crtc_offset, 0);
	WREG32(EVERGREEN_DC_LUT_WRITE_EN_MASK + radeon_crtc->crtc_offset, 0x00000007);

	WREG32(EVERGREEN_DC_LUT_RW_INDEX + radeon_crtc->crtc_offset, 0);
	for (i = 0; i < 256; i++) {
		WREG32(EVERGREEN_DC_LUT_30_COLOR + radeon_crtc->crtc_offset,
		       (radeon_crtc->lut_r[i] << 20) |
		       (radeon_crtc->lut_g[i] << 10) |
		       (radeon_crtc->lut_b[i] << 0));
	}
}

static void dce5_crtc_load_lut(struct drm_crtc *crtc)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	int i;

	DRM_DEBUG_KMS("%d\n", radeon_crtc->crtc_id);

	WREG32(NI_INPUT_CSC_CONTROL + radeon_crtc->crtc_offset,
	       (NI_INPUT_CSC_GRPH_MODE(NI_INPUT_CSC_BYPASS) |
		NI_INPUT_CSC_OVL_MODE(NI_INPUT_CSC_BYPASS)));
	WREG32(NI_PRESCALE_GRPH_CONTROL + radeon_crtc->crtc_offset,
	       NI_GRPH_PRESCALE_BYPASS);
	WREG32(NI_PRESCALE_OVL_CONTROL + radeon_crtc->crtc_offset,
	       NI_OVL_PRESCALE_BYPASS);
	WREG32(NI_INPUT_GAMMA_CONTROL + radeon_crtc->crtc_offset,
	       (NI_GRPH_INPUT_GAMMA_MODE(NI_INPUT_GAMMA_USE_LUT) |
		NI_OVL_INPUT_GAMMA_MODE(NI_INPUT_GAMMA_USE_LUT)));

	WREG32(EVERGREEN_DC_LUT_CONTROL + radeon_crtc->crtc_offset, 0);

	WREG32(EVERGREEN_DC_LUT_BLACK_OFFSET_BLUE + radeon_crtc->crtc_offset, 0);
	WREG32(EVERGREEN_DC_LUT_BLACK_OFFSET_GREEN + radeon_crtc->crtc_offset, 0);
	WREG32(EVERGREEN_DC_LUT_BLACK_OFFSET_RED + radeon_crtc->crtc_offset, 0);

	WREG32(EVERGREEN_DC_LUT_WHITE_OFFSET_BLUE + radeon_crtc->crtc_offset, 0xffff);
	WREG32(EVERGREEN_DC_LUT_WHITE_OFFSET_GREEN + radeon_crtc->crtc_offset, 0xffff);
	WREG32(EVERGREEN_DC_LUT_WHITE_OFFSET_RED + radeon_crtc->crtc_offset, 0xffff);

	WREG32(EVERGREEN_DC_LUT_RW_MODE + radeon_crtc->crtc_offset, 0);
	WREG32(EVERGREEN_DC_LUT_WRITE_EN_MASK + radeon_crtc->crtc_offset, 0x00000007);

	WREG32(EVERGREEN_DC_LUT_RW_INDEX + radeon_crtc->crtc_offset, 0);
	for (i = 0; i < 256; i++) {
		WREG32(EVERGREEN_DC_LUT_30_COLOR + radeon_crtc->crtc_offset,
		       (radeon_crtc->lut_r[i] << 20) |
		       (radeon_crtc->lut_g[i] << 10) |
		       (radeon_crtc->lut_b[i] << 0));
	}

	WREG32(NI_DEGAMMA_CONTROL + radeon_crtc->crtc_offset,
	       (NI_GRPH_DEGAMMA_MODE(NI_DEGAMMA_BYPASS) |
		NI_OVL_DEGAMMA_MODE(NI_DEGAMMA_BYPASS) |
		NI_ICON_DEGAMMA_MODE(NI_DEGAMMA_BYPASS) |
		NI_CURSOR_DEGAMMA_MODE(NI_DEGAMMA_BYPASS)));
	WREG32(NI_GAMUT_REMAP_CONTROL + radeon_crtc->crtc_offset,
	       (NI_GRPH_GAMUT_REMAP_MODE(NI_GAMUT_REMAP_BYPASS) |
		NI_OVL_GAMUT_REMAP_MODE(NI_GAMUT_REMAP_BYPASS)));
	WREG32(NI_REGAMMA_CONTROL + radeon_crtc->crtc_offset,
	       (NI_GRPH_REGAMMA_MODE(NI_REGAMMA_BYPASS) |
		NI_OVL_REGAMMA_MODE(NI_REGAMMA_BYPASS)));
	WREG32(NI_OUTPUT_CSC_CONTROL + radeon_crtc->crtc_offset,
	       (NI_OUTPUT_CSC_GRPH_MODE(NI_OUTPUT_CSC_BYPASS) |
		NI_OUTPUT_CSC_OVL_MODE(NI_OUTPUT_CSC_BYPASS)));
	/* XXX match this to the depth of the crtc fmt block, move to modeset? */
	WREG32(0x6940 + radeon_crtc->crtc_offset, 0);
	if (ASIC_IS_DCE8(rdev)) {
		/* XXX this only needs to be programmed once per crtc at startup,
		 * not sure where the best place for it is
		 */
		WREG32(CIK_ALPHA_CONTROL + radeon_crtc->crtc_offset,
		       CIK_CURSOR_ALPHA_BLND_ENA);
	}
}

static void legacy_crtc_load_lut(struct drm_crtc *crtc)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	int i;
	uint32_t dac2_cntl;

	dac2_cntl = RREG32(RADEON_DAC_CNTL2);
	if (radeon_crtc->crtc_id == 0)
		dac2_cntl &= (uint32_t)~RADEON_DAC2_PALETTE_ACC_CTL;
	else
		dac2_cntl |= RADEON_DAC2_PALETTE_ACC_CTL;
	WREG32(RADEON_DAC_CNTL2, dac2_cntl);

	WREG8(RADEON_PALETTE_INDEX, 0);
	for (i = 0; i < 256; i++) {
		WREG32(RADEON_PALETTE_30_DATA,
			     (radeon_crtc->lut_r[i] << 20) |
			     (radeon_crtc->lut_g[i] << 10) |
			     (radeon_crtc->lut_b[i] << 0));
	}
}

void radeon_crtc_load_lut(struct drm_crtc *crtc)
{
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;

	if (!crtc->enabled)
		return;

	if (ASIC_IS_DCE5(rdev))
		dce5_crtc_load_lut(crtc);
	else if (ASIC_IS_DCE4(rdev))
		dce4_crtc_load_lut(crtc);
	else if (ASIC_IS_AVIVO(rdev))
		avivo_crtc_load_lut(crtc);
	else
		legacy_crtc_load_lut(crtc);
}

/** Sets the color ramps on behalf of fbcon */
void radeon_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
			      u16 blue, int regno)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);

	radeon_crtc->lut_r[regno] = red >> 6;
	radeon_crtc->lut_g[regno] = green >> 6;
	radeon_crtc->lut_b[regno] = blue >> 6;
}

/** Gets the color ramps on behalf of fbcon */
void radeon_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
			      u16 *blue, int regno)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);

	*red = radeon_crtc->lut_r[regno] << 6;
	*green = radeon_crtc->lut_g[regno] << 6;
	*blue = radeon_crtc->lut_b[regno] << 6;
}

static void radeon_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
				  u16 *blue, uint32_t start, uint32_t size)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	int end = (start + size > 256) ? 256 : start + size, i;

	/* userspace palettes are always correct as is */
	for (i = start; i < end; i++) {
		radeon_crtc->lut_r[i] = red[i] >> 6;
		radeon_crtc->lut_g[i] = green[i] >> 6;
		radeon_crtc->lut_b[i] = blue[i] >> 6;
	}
	radeon_crtc_load_lut(crtc);
}

static void radeon_crtc_destroy(struct drm_crtc *crtc)
{
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);

	drm_crtc_cleanup(crtc);
	destroy_workqueue(radeon_crtc->flip_queue);
	kfree(radeon_crtc);
}

/**
 * radeon_unpin_work_func - unpin old buffer object
 *
 * @__work - kernel work item
 *
 * Unpin the old frame buffer object outside of the interrupt handler
 */
static void radeon_unpin_work_func(struct work_struct *__work)
{
	struct radeon_flip_work *work =
		container_of(__work, struct radeon_flip_work, unpin_work);
	int r;

	/* unpin of the old buffer */
	r = radeon_bo_reserve(work->old_rbo, false);
	if (likely(r == 0)) {
		r = radeon_bo_unpin(work->old_rbo);
		if (unlikely(r != 0)) {
			DRM_ERROR("failed to unpin buffer after flip\n");
		}
		radeon_bo_unreserve(work->old_rbo);
	} else
		DRM_ERROR("failed to reserve buffer after flip\n");

	drm_gem_object_unreference_unlocked(&work->old_rbo->gem_base);
	kfree(work);
}

void radeon_crtc_handle_vblank(struct radeon_device *rdev, int crtc_id)
{
	struct radeon_crtc *radeon_crtc = rdev->mode_info.crtcs[crtc_id];
	unsigned long flags;
	u32 update_pending;
	int vpos, hpos;

	/* can happen during initialization */
	if (radeon_crtc == NULL)
		return;

	/* Skip the pageflip completion check below (based on polling) on
	 * asics which reliably support hw pageflip completion irqs. pflip
	 * irqs are a reliable and race-free method of handling pageflip
	 * completion detection. A use_pflipirq module parameter < 2 allows
	 * to override this in case of asics with faulty pflip irqs.
	 * A module parameter of 0 would only use this polling based path,
	 * a parameter of 1 would use pflip irq only as a backup to this
	 * path, as in Linux 3.16.
	 */
	if ((radeon_use_pflipirq == 2) && ASIC_IS_DCE4(rdev))
		return;

	spin_lock_irqsave(&rdev->ddev->event_lock, flags);
	if (radeon_crtc->flip_status != RADEON_FLIP_SUBMITTED) {
		DRM_DEBUG_DRIVER("radeon_crtc->flip_status = %d != "
				 "RADEON_FLIP_SUBMITTED(%d)\n",
				 radeon_crtc->flip_status,
				 RADEON_FLIP_SUBMITTED);
		spin_unlock_irqrestore(&rdev->ddev->event_lock, flags);
		return;
	}

	update_pending = radeon_page_flip_pending(rdev, crtc_id);

	/* Has the pageflip already completed in crtc, or is it certain
	 * to complete in this vblank?
	 */
	if (update_pending &&
	    (DRM_SCANOUTPOS_VALID & radeon_get_crtc_scanoutpos(rdev->ddev, crtc_id, 0,
							       &vpos, &hpos, NULL, NULL)) &&
	    ((vpos >= (99 * rdev->mode_info.crtcs[crtc_id]->base.hwmode.crtc_vdisplay)/100) ||
	     (vpos < 0 && !ASIC_IS_AVIVO(rdev)))) {
		/* crtc didn't flip in this target vblank interval,
		 * but flip is pending in crtc. Based on the current
		 * scanout position we know that the current frame is
		 * (nearly) complete and the flip will (likely)
		 * complete before the start of the next frame.
		 */
		update_pending = 0;
	}
	spin_unlock_irqrestore(&rdev->ddev->event_lock, flags);
	if (!update_pending)
		radeon_crtc_handle_flip(rdev, crtc_id);
}

/**
 * radeon_crtc_handle_flip - page flip completed
 *
 * @rdev: radeon device pointer
 * @crtc_id: crtc number this event is for
 *
 * Called when we are sure that a page flip for this crtc is completed.
 */
void radeon_crtc_handle_flip(struct radeon_device *rdev, int crtc_id)
{
	struct radeon_crtc *radeon_crtc = rdev->mode_info.crtcs[crtc_id];
	struct radeon_flip_work *work;
	unsigned long flags;

	/* this can happen at init */
	if (radeon_crtc == NULL)
		return;

	spin_lock_irqsave(&rdev->ddev->event_lock, flags);
	work = radeon_crtc->flip_work;
	if (radeon_crtc->flip_status != RADEON_FLIP_SUBMITTED) {
		DRM_DEBUG_DRIVER("radeon_crtc->flip_status = %d != "
				 "RADEON_FLIP_SUBMITTED(%d)\n",
				 radeon_crtc->flip_status,
				 RADEON_FLIP_SUBMITTED);
		spin_unlock_irqrestore(&rdev->ddev->event_lock, flags);
		return;
	}

	/* Pageflip completed. Clean up. */
	radeon_crtc->flip_status = RADEON_FLIP_NONE;
	radeon_crtc->flip_work = NULL;

	/* wakeup userspace */
	if (work->event)
		drm_send_vblank_event(rdev->ddev, crtc_id, work->event);

	spin_unlock_irqrestore(&rdev->ddev->event_lock, flags);

	drm_vblank_put(rdev->ddev, radeon_crtc->crtc_id);
	radeon_irq_kms_pflip_irq_put(rdev, work->crtc_id);
	queue_work(radeon_crtc->flip_queue, &work->unpin_work);
}

/**
 * radeon_flip_work_func - page flip framebuffer
 *
 * @work - kernel work item
 *
 * Wait for the buffer object to become idle and do the actual page flip
 */
static void radeon_flip_work_func(struct work_struct *__work)
{
	struct radeon_flip_work *work =
		container_of(__work, struct radeon_flip_work, flip_work);
	struct radeon_device *rdev = work->rdev;
	struct radeon_crtc *radeon_crtc = rdev->mode_info.crtcs[work->crtc_id];

	struct drm_crtc *crtc = &radeon_crtc->base;
	unsigned long flags;
	int r;

        down_read(&rdev->exclusive_lock);
	if (work->fence) {
		struct radeon_fence *fence;

		fence = to_radeon_fence(work->fence);
		if (fence && fence->rdev == rdev) {
			r = radeon_fence_wait(fence, false);
			if (r == -EDEADLK) {
				up_read(&rdev->exclusive_lock);
				do {
					r = radeon_gpu_reset(rdev);
				} while (r == -EAGAIN);
				down_read(&rdev->exclusive_lock);
			}
		} else
			r = fence_wait(work->fence, false);

		if (r)
			DRM_ERROR("failed to wait on page flip fence (%d)!\n", r);

		/* We continue with the page flip even if we failed to wait on
		 * the fence, otherwise the DRM core and userspace will be
		 * confused about which BO the CRTC is scanning out
		 */

		fence_put(work->fence);
		work->fence = NULL;
	}

	/* We borrow the event spin lock for protecting flip_status */
	spin_lock_irqsave(&crtc->dev->event_lock, flags);

	/* set the proper interrupt */
	radeon_irq_kms_pflip_irq_get(rdev, radeon_crtc->crtc_id);

	/* do the flip (mmio) */
	radeon_page_flip(rdev, radeon_crtc->crtc_id, work->base);

	radeon_crtc->flip_status = RADEON_FLIP_SUBMITTED;
	spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
	up_read(&rdev->exclusive_lock);
}

static int radeon_crtc_page_flip(struct drm_crtc *crtc,
				 struct drm_framebuffer *fb,
				 struct drm_pending_vblank_event *event,
				 uint32_t page_flip_flags)
{
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct radeon_framebuffer *old_radeon_fb;
	struct radeon_framebuffer *new_radeon_fb;
	struct drm_gem_object *obj;
	struct radeon_flip_work *work;
	struct radeon_bo *new_rbo;
	uint32_t tiling_flags, pitch_pixels;
	uint64_t base;
	unsigned long flags;
	int r;

	work = kzalloc(sizeof *work, GFP_KERNEL);
	if (work == NULL)
		return -ENOMEM;

	INIT_WORK(&work->flip_work, radeon_flip_work_func);
	INIT_WORK(&work->unpin_work, radeon_unpin_work_func);

	work->rdev = rdev;
	work->crtc_id = radeon_crtc->crtc_id;
	work->event = event;

	/* schedule unpin of the old buffer */
	old_radeon_fb = to_radeon_framebuffer(crtc->primary->fb);
	obj = old_radeon_fb->obj;

	/* take a reference to the old object */
	drm_gem_object_reference(obj);
	work->old_rbo = gem_to_radeon_bo(obj);

	new_radeon_fb = to_radeon_framebuffer(fb);
	obj = new_radeon_fb->obj;
	new_rbo = gem_to_radeon_bo(obj);

	/* pin the new buffer */
	DRM_DEBUG_DRIVER("flip-ioctl() cur_rbo = %p, new_rbo = %p\n",
			 work->old_rbo, new_rbo);

	r = radeon_bo_reserve(new_rbo, false);
	if (unlikely(r != 0)) {
		DRM_ERROR("failed to reserve new rbo buffer before flip\n");
		goto cleanup;
	}
	/* Only 27 bit offset for legacy CRTC */
	r = radeon_bo_pin_restricted(new_rbo, RADEON_GEM_DOMAIN_VRAM,
				     ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27, &base);
	if (unlikely(r != 0)) {
		radeon_bo_unreserve(new_rbo);
		r = -EINVAL;
		DRM_ERROR("failed to pin new rbo buffer before flip\n");
		goto cleanup;
	}
	work->fence = fence_get(reservation_object_get_excl(new_rbo->tbo.resv));
	radeon_bo_get_tiling_flags(new_rbo, &tiling_flags, NULL);
	radeon_bo_unreserve(new_rbo);

	if (!ASIC_IS_AVIVO(rdev)) {
		/* crtc offset is from display base addr not FB location */
		base -= radeon_crtc->legacy_display_base_addr;
		pitch_pixels = fb->pitches[0] / (fb->bits_per_pixel / 8);

		if (tiling_flags & RADEON_TILING_MACRO) {
			if (ASIC_IS_R300(rdev)) {
				base &= ~0x7ff;
			} else {
				int byteshift = fb->bits_per_pixel >> 4;
				int tile_addr = (((crtc->y >> 3) * pitch_pixels +  crtc->x) >> (8 - byteshift)) << 11;
				base += tile_addr + ((crtc->x << byteshift) % 256) + ((crtc->y % 8) << 8);
			}
		} else {
			int offset = crtc->y * pitch_pixels + crtc->x;
			switch (fb->bits_per_pixel) {
			case 8:
			default:
				offset *= 1;
				break;
			case 15:
			case 16:
				offset *= 2;
				break;
			case 24:
				offset *= 3;
				break;
			case 32:
				offset *= 4;
				break;
			}
			base += offset;
		}
		base &= ~7;
	}
	work->base = base;

	r = drm_vblank_get(crtc->dev, radeon_crtc->crtc_id);
	if (r) {
		DRM_ERROR("failed to get vblank before flip\n");
		goto pflip_cleanup;
	}

	/* We borrow the event spin lock for protecting flip_work */
	spin_lock_irqsave(&crtc->dev->event_lock, flags);

	if (radeon_crtc->flip_status != RADEON_FLIP_NONE) {
		DRM_DEBUG_DRIVER("flip queue: crtc already busy\n");
		spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
		r = -EBUSY;
		goto vblank_cleanup;
	}
	radeon_crtc->flip_status = RADEON_FLIP_PENDING;
	radeon_crtc->flip_work = work;

	/* update crtc fb */
	crtc->primary->fb = fb;

	spin_unlock_irqrestore(&crtc->dev->event_lock, flags);

	queue_work(radeon_crtc->flip_queue, &work->flip_work);
	return 0;

vblank_cleanup:
	drm_vblank_put(crtc->dev, radeon_crtc->crtc_id);

pflip_cleanup:
	if (unlikely(radeon_bo_reserve(new_rbo, false) != 0)) {
		DRM_ERROR("failed to reserve new rbo in error path\n");
		goto cleanup;
	}
	if (unlikely(radeon_bo_unpin(new_rbo) != 0)) {
		DRM_ERROR("failed to unpin new rbo in error path\n");
	}
	radeon_bo_unreserve(new_rbo);

cleanup:
	drm_gem_object_unreference_unlocked(&work->old_rbo->gem_base);
	fence_put(work->fence);
	kfree(work);
	return r;
}

static int
radeon_crtc_set_config(struct drm_mode_set *set)
{
	struct drm_device *dev;
	struct radeon_device *rdev;
	struct drm_crtc *crtc;
	bool active = false;
	int ret;

	if (!set || !set->crtc)
		return -EINVAL;

	dev = set->crtc->dev;

	ret = pm_runtime_get_sync(dev->dev);
	if (ret < 0)
		return ret;

	ret = drm_crtc_helper_set_config(set);

	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
		if (crtc->enabled)
			active = true;

	pm_runtime_mark_last_busy(dev->dev);

	rdev = dev->dev_private;
	/* if we have active crtcs and we don't have a power ref,
	   take the current one */
	if (active && !rdev->have_disp_power_ref) {
		rdev->have_disp_power_ref = true;
		return ret;
	}
	/* if we have no active crtcs, then drop the power ref
	   we got before */
	if (!active && rdev->have_disp_power_ref) {
		pm_runtime_put_autosuspend(dev->dev);
		rdev->have_disp_power_ref = false;
	}

	/* drop the power reference we got coming in here */
	pm_runtime_put_autosuspend(dev->dev);
	return ret;
}
static const struct drm_crtc_funcs radeon_crtc_funcs = {
	.cursor_set2 = radeon_crtc_cursor_set2,
	.cursor_move = radeon_crtc_cursor_move,
	.gamma_set = radeon_crtc_gamma_set,
	.set_config = radeon_crtc_set_config,
	.destroy = radeon_crtc_destroy,
	.page_flip = radeon_crtc_page_flip,
};

static void radeon_crtc_init(struct drm_device *dev, int index)
{
	struct radeon_device *rdev = dev->dev_private;
	struct radeon_crtc *radeon_crtc;
	int i;

	radeon_crtc = kzalloc(sizeof(struct radeon_crtc) + (RADEONFB_CONN_LIMIT * sizeof(struct drm_connector *)), GFP_KERNEL);
	if (radeon_crtc == NULL)
		return;

	drm_crtc_init(dev, &radeon_crtc->base, &radeon_crtc_funcs);

	drm_mode_crtc_set_gamma_size(&radeon_crtc->base, 256);
	radeon_crtc->crtc_id = index;
	radeon_crtc->flip_queue = create_singlethread_workqueue("radeon-crtc");
	rdev->mode_info.crtcs[index] = radeon_crtc;

	if (rdev->family >= CHIP_BONAIRE) {
		radeon_crtc->max_cursor_width = CIK_CURSOR_WIDTH;
		radeon_crtc->max_cursor_height = CIK_CURSOR_HEIGHT;
	} else {
		radeon_crtc->max_cursor_width = CURSOR_WIDTH;
		radeon_crtc->max_cursor_height = CURSOR_HEIGHT;
	}
	dev->mode_config.cursor_width = radeon_crtc->max_cursor_width;
	dev->mode_config.cursor_height = radeon_crtc->max_cursor_height;

#if 0
	radeon_crtc->mode_set.crtc = &radeon_crtc->base;
	radeon_crtc->mode_set.connectors = (struct drm_connector **)(radeon_crtc + 1);
	radeon_crtc->mode_set.num_connectors = 0;
#endif

	for (i = 0; i < 256; i++) {
		radeon_crtc->lut_r[i] = i << 2;
		radeon_crtc->lut_g[i] = i << 2;
		radeon_crtc->lut_b[i] = i << 2;
	}

	if (rdev->is_atom_bios && (ASIC_IS_AVIVO(rdev) || radeon_r4xx_atom))
		radeon_atombios_init_crtc(dev, radeon_crtc);
	else
		radeon_legacy_init_crtc(dev, radeon_crtc);
}

static const char *encoder_names[38] = {
	"NONE",
	"INTERNAL_LVDS",
	"INTERNAL_TMDS1",
	"INTERNAL_TMDS2",
	"INTERNAL_DAC1",
	"INTERNAL_DAC2",
	"INTERNAL_SDVOA",
	"INTERNAL_SDVOB",
	"SI170B",
	"CH7303",
	"CH7301",
	"INTERNAL_DVO1",
	"EXTERNAL_SDVOA",
	"EXTERNAL_SDVOB",
	"TITFP513",
	"INTERNAL_LVTM1",
	"VT1623",
	"HDMI_SI1930",
	"HDMI_INTERNAL",
	"INTERNAL_KLDSCP_TMDS1",
	"INTERNAL_KLDSCP_DVO1",
	"INTERNAL_KLDSCP_DAC1",
	"INTERNAL_KLDSCP_DAC2",
	"SI178",
	"MVPU_FPGA",
	"INTERNAL_DDI",
	"VT1625",
	"HDMI_SI1932",
	"DP_AN9801",
	"DP_DP501",
	"INTERNAL_UNIPHY",
	"INTERNAL_KLDSCP_LVTMA",
	"INTERNAL_UNIPHY1",
	"INTERNAL_UNIPHY2",
	"NUTMEG",
	"TRAVIS",
	"INTERNAL_VCE",
	"INTERNAL_UNIPHY3",
};

static const char *hpd_names[6] = {
	"HPD1",
	"HPD2",
	"HPD3",
	"HPD4",
	"HPD5",
	"HPD6",
};

static void radeon_print_display_setup(struct drm_device *dev)
{
	struct drm_connector *connector;
	struct radeon_connector *radeon_connector;
	struct drm_encoder *encoder;
	struct radeon_encoder *radeon_encoder;
	uint32_t devices;
	int i = 0;

	DRM_INFO("Radeon Display Connectors\n");
	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
		radeon_connector = to_radeon_connector(connector);
		DRM_INFO("Connector %d:\n", i);
		DRM_INFO("  %s\n", connector->name);
		if (radeon_connector->hpd.hpd != RADEON_HPD_NONE)
			DRM_INFO("  %s\n", hpd_names[radeon_connector->hpd.hpd]);
		if (radeon_connector->ddc_bus) {
			DRM_INFO("  DDC: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
				 radeon_connector->ddc_bus->rec.mask_clk_reg,
				 radeon_connector->ddc_bus->rec.mask_data_reg,
				 radeon_connector->ddc_bus->rec.a_clk_reg,
				 radeon_connector->ddc_bus->rec.a_data_reg,
				 radeon_connector->ddc_bus->rec.en_clk_reg,
				 radeon_connector->ddc_bus->rec.en_data_reg,
				 radeon_connector->ddc_bus->rec.y_clk_reg,
				 radeon_connector->ddc_bus->rec.y_data_reg);
			if (radeon_connector->router.ddc_valid)
				DRM_INFO("  DDC Router 0x%x/0x%x\n",
					 radeon_connector->router.ddc_mux_control_pin,
					 radeon_connector->router.ddc_mux_state);
			if (radeon_connector->router.cd_valid)
				DRM_INFO("  Clock/Data Router 0x%x/0x%x\n",
					 radeon_connector->router.cd_mux_control_pin,
					 radeon_connector->router.cd_mux_state);
		} else {
			if (connector->connector_type == DRM_MODE_CONNECTOR_VGA ||
			    connector->connector_type == DRM_MODE_CONNECTOR_DVII ||
			    connector->connector_type == DRM_MODE_CONNECTOR_DVID ||
			    connector->connector_type == DRM_MODE_CONNECTOR_DVIA ||
			    connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
			    connector->connector_type == DRM_MODE_CONNECTOR_HDMIB)
				DRM_INFO("  DDC: no ddc bus - possible BIOS bug - please report to xorg-driver-ati@lists.x.org\n");
		}
		DRM_INFO("  Encoders:\n");
		list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
			radeon_encoder = to_radeon_encoder(encoder);
			devices = radeon_encoder->devices & radeon_connector->devices;
			if (devices) {
				if (devices & ATOM_DEVICE_CRT1_SUPPORT)
					DRM_INFO("    CRT1: %s\n", encoder_names[radeon_encoder->encoder_id]);
				if (devices & ATOM_DEVICE_CRT2_SUPPORT)
					DRM_INFO("    CRT2: %s\n", encoder_names[radeon_encoder->encoder_id]);
				if (devices & ATOM_DEVICE_LCD1_SUPPORT)
					DRM_INFO("    LCD1: %s\n", encoder_names[radeon_encoder->encoder_id]);
				if (devices & ATOM_DEVICE_DFP1_SUPPORT)
					DRM_INFO("    DFP1: %s\n", encoder_names[radeon_encoder->encoder_id]);
				if (devices & ATOM_DEVICE_DFP2_SUPPORT)
					DRM_INFO("    DFP2: %s\n", encoder_names[radeon_encoder->encoder_id]);
				if (devices & ATOM_DEVICE_DFP3_SUPPORT)
					DRM_INFO("    DFP3: %s\n", encoder_names[radeon_encoder->encoder_id]);
				if (devices & ATOM_DEVICE_DFP4_SUPPORT)
					DRM_INFO("    DFP4: %s\n", encoder_names[radeon_encoder->encoder_id]);
				if (devices & ATOM_DEVICE_DFP5_SUPPORT)
					DRM_INFO("    DFP5: %s\n", encoder_names[radeon_encoder->encoder_id]);
				if (devices & ATOM_DEVICE_DFP6_SUPPORT)
					DRM_INFO("    DFP6: %s\n", encoder_names[radeon_encoder->encoder_id]);
				if (devices & ATOM_DEVICE_TV1_SUPPORT)
					DRM_INFO("    TV1: %s\n", encoder_names[radeon_encoder->encoder_id]);
				if (devices & ATOM_DEVICE_CV_SUPPORT)
					DRM_INFO("    CV: %s\n", encoder_names[radeon_encoder->encoder_id]);
			}
		}
		i++;
	}
}

static bool radeon_setup_enc_conn(struct drm_device *dev)
{
	struct radeon_device *rdev = dev->dev_private;
	bool ret = false;

	if (rdev->bios) {
		if (rdev->is_atom_bios) {
			ret = radeon_get_atom_connector_info_from_supported_devices_table(dev);
			if (ret == false)
				ret = radeon_get_atom_connector_info_from_object_table(dev);
		} else {
			ret = radeon_get_legacy_connector_info_from_bios(dev);
			if (ret == false)
				ret = radeon_get_legacy_connector_info_from_table(dev);
		}
	} else {
		if (!ASIC_IS_AVIVO(rdev))
			ret = radeon_get_legacy_connector_info_from_table(dev);
	}
	if (ret) {
		radeon_setup_encoder_clones(dev);
		radeon_print_display_setup(dev);
	}

	return ret;
}

/* avivo */

/**
 * avivo_reduce_ratio - fractional number reduction
 *
 * @nom: nominator
 * @den: denominator
 * @nom_min: minimum value for nominator
 * @den_min: minimum value for denominator
 *
 * Find the greatest common divisor and apply it on both nominator and
 * denominator, but make nominator and denominator are at least as large
 * as their minimum values.
 */
static void avivo_reduce_ratio(unsigned *nom, unsigned *den,
			       unsigned nom_min, unsigned den_min)
{
	unsigned tmp;

	/* reduce the numbers to a simpler ratio */
	tmp = gcd(*nom, *den);
	*nom /= tmp;
	*den /= tmp;

	/* make sure nominator is large enough */
        if (*nom < nom_min) {
		tmp = DIV_ROUND_UP(nom_min, *nom);
		*nom *= tmp;
		*den *= tmp;
	}

	/* make sure the denominator is large enough */
	if (*den < den_min) {
		tmp = DIV_ROUND_UP(den_min, *den);
		*nom *= tmp;
		*den *= tmp;
	}
}

/**
 * avivo_get_fb_ref_div - feedback and ref divider calculation
 *
 * @nom: nominator
 * @den: denominator
 * @post_div: post divider
 * @fb_div_max: feedback divider maximum
 * @ref_div_max: reference divider maximum
 * @fb_div: resulting feedback divider
 * @ref_div: resulting reference divider
 *
 * Calculate feedback and reference divider for a given post divider. Makes
 * sure we stay within the limits.
 */
static void avivo_get_fb_ref_div(unsigned nom, unsigned den, unsigned post_div,
				 unsigned fb_div_max, unsigned ref_div_max,
				 unsigned *fb_div, unsigned *ref_div)
{
	/* limit reference * post divider to a maximum */
	ref_div_max = max(min(100 / post_div, ref_div_max), 1u);

	/* get matching reference and feedback divider */
	*ref_div = min(max(DIV_ROUND_CLOSEST(den, post_div), 1u), ref_div_max);
	*fb_div = DIV_ROUND_CLOSEST(nom * *ref_div * post_div, den);

	/* limit fb divider to its maximum */
        if (*fb_div > fb_div_max) {
		*ref_div = DIV_ROUND_CLOSEST(*ref_div * fb_div_max, *fb_div);
		*fb_div = fb_div_max;
	}
}

/**
 * radeon_compute_pll_avivo - compute PLL paramaters
 *
 * @pll: information about the PLL
 * @dot_clock_p: resulting pixel clock
 * fb_div_p: resulting feedback divider
 * frac_fb_div_p: fractional part of the feedback divider
 * ref_div_p: resulting reference divider
 * post_div_p: resulting reference divider
 *
 * Try to calculate the PLL parameters to generate the given frequency:
 * dot_clock = (ref_freq * feedback_div) / (ref_div * post_div)
 */
void radeon_compute_pll_avivo(struct radeon_pll *pll,
			      u32 freq,
			      u32 *dot_clock_p,
			      u32 *fb_div_p,
			      u32 *frac_fb_div_p,
			      u32 *ref_div_p,
			      u32 *post_div_p)
{
	unsigned target_clock = pll->flags & RADEON_PLL_USE_FRAC_FB_DIV ?
		freq : freq / 10;

	unsigned fb_div_min, fb_div_max, fb_div;
	unsigned post_div_min, post_div_max, post_div;
	unsigned ref_div_min, ref_div_max, ref_div;
	unsigned post_div_best, diff_best;
	unsigned nom, den;

	/* determine allowed feedback divider range */
	fb_div_min = pll->min_feedback_div;
	fb_div_max = pll->max_feedback_div;

	if (pll->flags & RADEON_PLL_USE_FRAC_FB_DIV) {
		fb_div_min *= 10;
		fb_div_max *= 10;
	}

	/* determine allowed ref divider range */
	if (pll->flags & RADEON_PLL_USE_REF_DIV)
		ref_div_min = pll->reference_div;
	else
		ref_div_min = pll->min_ref_div;

	if (pll->flags & RADEON_PLL_USE_FRAC_FB_DIV &&
	    pll->flags & RADEON_PLL_USE_REF_DIV)
		ref_div_max = pll->reference_div;
	else if (pll->flags & RADEON_PLL_PREFER_MINM_OVER_MAXP)
		/* fix for problems on RS880 */
		ref_div_max = min(pll->max_ref_div, 7u);
	else
		ref_div_max = pll->max_ref_div;

	/* determine allowed post divider range */
	if (pll->flags & RADEON_PLL_USE_POST_DIV) {
		post_div_min = pll->post_div;
		post_div_max = pll->post_div;
	} else {
		unsigned vco_min, vco_max;

		if (pll->flags & RADEON_PLL_IS_LCD) {
			vco_min = pll->lcd_pll_out_min;
			vco_max = pll->lcd_pll_out_max;
		} else {
			vco_min = pll->pll_out_min;
			vco_max = pll->pll_out_max;
		}

		if (pll->flags & RADEON_PLL_USE_FRAC_FB_DIV) {
			vco_min *= 10;
			vco_max *= 10;
		}

		post_div_min = vco_min / target_clock;
		if ((target_clock * post_div_min) < vco_min)
			++post_div_min;
		if (post_div_min < pll->min_post_div)
			post_div_min = pll->min_post_div;

		post_div_max = vco_max / target_clock;
		if ((target_clock * post_div_max) > vco_max)
			--post_div_max;
		if (post_div_max > pll->max_post_div)
			post_div_max = pll->max_post_div;
	}

	/* represent the searched ratio as fractional number */
	nom = target_clock;
	den = pll->reference_freq;

	/* reduce the numbers to a simpler ratio */
	avivo_reduce_ratio(&nom, &den, fb_div_min, post_div_min);

	/* now search for a post divider */
	if (pll->flags & RADEON_PLL_PREFER_MINM_OVER_MAXP)
		post_div_best = post_div_min;
	else
		post_div_best = post_div_max;
	diff_best = ~0;

	for (post_div = post_div_min; post_div <= post_div_max; ++post_div) {
		unsigned diff;
		avivo_get_fb_ref_div(nom, den, post_div, fb_div_max,
				     ref_div_max, &fb_div, &ref_div);
		diff = abs(target_clock - (pll->reference_freq * fb_div) /
			(ref_div * post_div));

		if (diff < diff_best || (diff == diff_best &&
		    !(pll->flags & RADEON_PLL_PREFER_MINM_OVER_MAXP))) {

			post_div_best = post_div;
			diff_best = diff;
		}
	}
	post_div = post_div_best;

	/* get the feedback and reference divider for the optimal value */
	avivo_get_fb_ref_div(nom, den, post_div, fb_div_max, ref_div_max,
			     &fb_div, &ref_div);

	/* reduce the numbers to a simpler ratio once more */
	/* this also makes sure that the reference divider is large enough */
	avivo_reduce_ratio(&fb_div, &ref_div, fb_div_min, ref_div_min);

	/* avoid high jitter with small fractional dividers */
	if (pll->flags & RADEON_PLL_USE_FRAC_FB_DIV && (fb_div % 10)) {
		fb_div_min = max(fb_div_min, (9 - (fb_div % 10)) * 20 + 50);
		if (fb_div < fb_div_min) {
			unsigned tmp = DIV_ROUND_UP(fb_div_min, fb_div);
			fb_div *= tmp;
			ref_div *= tmp;
		}
	}

	/* and finally save the result */
	if (pll->flags & RADEON_PLL_USE_FRAC_FB_DIV) {
		*fb_div_p = fb_div / 10;
		*frac_fb_div_p = fb_div % 10;
	} else {
		*fb_div_p = fb_div;
		*frac_fb_div_p = 0;
	}

	*dot_clock_p = ((pll->reference_freq * *fb_div_p * 10) +
			(pll->reference_freq * *frac_fb_div_p)) /
		       (ref_div * post_div * 10);
	*ref_div_p = ref_div;
	*post_div_p = post_div;

	DRM_DEBUG_KMS("%d - %d, pll dividers - fb: %d.%d ref: %d, post %d\n",
		      freq, *dot_clock_p * 10, *fb_div_p, *frac_fb_div_p,
		      ref_div, post_div);
}

/* pre-avivo */
static inline uint32_t radeon_div(uint64_t n, uint32_t d)
{
	uint64_t mod;

	n += d / 2;

	mod = do_div(n, d);
	return n;
}

void radeon_compute_pll_legacy(struct radeon_pll *pll,
			       uint64_t freq,
			       uint32_t *dot_clock_p,
			       uint32_t *fb_div_p,
			       uint32_t *frac_fb_div_p,
			       uint32_t *ref_div_p,
			       uint32_t *post_div_p)
{
	uint32_t min_ref_div = pll->min_ref_div;
	uint32_t max_ref_div = pll->max_ref_div;
	uint32_t min_post_div = pll->min_post_div;
	uint32_t max_post_div = pll->max_post_div;
	uint32_t min_fractional_feed_div = 0;
	uint32_t max_fractional_feed_div = 0;
	uint32_t best_vco = pll->best_vco;
	uint32_t best_post_div = 1;
	uint32_t best_ref_div = 1;
	uint32_t best_feedback_div = 1;
	uint32_t best_frac_feedback_div = 0;
	uint32_t best_freq = -1;
	uint32_t best_error = 0xffffffff;
	uint32_t best_vco_diff = 1;
	uint32_t post_div;
	u32 pll_out_min, pll_out_max;

	DRM_DEBUG_KMS("PLL freq %llu %u %u\n", freq, pll->min_ref_div, pll->max_ref_div);
	freq = freq * 1000;

	if (pll->flags & RADEON_PLL_IS_LCD) {
		pll_out_min = pll->lcd_pll_out_min;
		pll_out_max = pll->lcd_pll_out_max;
	} else {
		pll_out_min = pll->pll_out_min;
		pll_out_max = pll->pll_out_max;
	}

	if (pll_out_min > 64800)
		pll_out_min = 64800;

	if (pll->flags & RADEON_PLL_USE_REF_DIV)
		min_ref_div = max_ref_div = pll->reference_div;
	else {
		while (min_ref_div < max_ref_div-1) {
			uint32_t mid = (min_ref_div + max_ref_div) / 2;
			uint32_t pll_in = pll->reference_freq / mid;
			if (pll_in < pll->pll_in_min)
				max_ref_div = mid;
			else if (pll_in > pll->pll_in_max)
				min_ref_div = mid;
			else
				break;
		}
	}

	if (pll->flags & RADEON_PLL_USE_POST_DIV)
		min_post_div = max_post_div = pll->post_div;

	if (pll->flags & RADEON_PLL_USE_FRAC_FB_DIV) {
		min_fractional_feed_div = pll->min_frac_feedback_div;
		max_fractional_feed_div = pll->max_frac_feedback_div;
	}

	for (post_div = max_post_div; post_div >= min_post_div; --post_div) {
		uint32_t ref_div;

		if ((pll->flags & RADEON_PLL_NO_ODD_POST_DIV) && (post_div & 1))
			continue;

		/* legacy radeons only have a few post_divs */
		if (pll->flags & RADEON_PLL_LEGACY) {
			if ((post_div == 5) ||
			    (post_div == 7) ||
			    (post_div == 9) ||
			    (post_div == 10) ||
			    (post_div == 11) ||
			    (post_div == 13) ||
			    (post_div == 14) ||
			    (post_div == 15))
				continue;
		}

		for (ref_div = min_ref_div; ref_div <= max_ref_div; ++ref_div) {
			uint32_t feedback_div, current_freq = 0, error, vco_diff;
			uint32_t pll_in = pll->reference_freq / ref_div;
			uint32_t min_feed_div = pll->min_feedback_div;
			uint32_t max_feed_div = pll->max_feedback_div + 1;

			if (pll_in < pll->pll_in_min || pll_in > pll->pll_in_max)
				continue;

			while (min_feed_div < max_feed_div) {
				uint32_t vco;
				uint32_t min_frac_feed_div = min_fractional_feed_div;
				uint32_t max_frac_feed_div = max_fractional_feed_div + 1;
				uint32_t frac_feedback_div;
				uint64_t tmp;

				feedback_div = (min_feed_div + max_feed_div) / 2;

				tmp = (uint64_t)pll->reference_freq * feedback_div;
				vco = radeon_div(tmp, ref_div);

				if (vco < pll_out_min) {
					min_feed_div = feedback_div + 1;
					continue;
				} else if (vco > pll_out_max) {
					max_feed_div = feedback_div;
					continue;
				}

				while (min_frac_feed_div < max_frac_feed_div) {
					frac_feedback_div = (min_frac_feed_div + max_frac_feed_div) / 2;
					tmp = (uint64_t)pll->reference_freq * 10000 * feedback_div;
					tmp += (uint64_t)pll->reference_freq * 1000 * frac_feedback_div;
					current_freq = radeon_div(tmp, ref_div * post_div);

					if (pll->flags & RADEON_PLL_PREFER_CLOSEST_LOWER) {
						if (freq < current_freq)
							error = 0xffffffff;
						else
							error = freq - current_freq;
					} else
						error = abs(current_freq - freq);
					vco_diff = abs(vco - best_vco);

					if ((best_vco == 0 && error < best_error) ||
					    (best_vco != 0 &&
					     ((best_error > 100 && error < best_error - 100) ||
					      (abs(error - best_error) < 100 && vco_diff < best_vco_diff)))) {
						best_post_div = post_div;
						best_ref_div = ref_div;
						best_feedback_div = feedback_div;
						best_frac_feedback_div = frac_feedback_div;
						best_freq = current_freq;
						best_error = error;
						best_vco_diff = vco_diff;
					} else if (current_freq == freq) {
						if (best_freq == -1) {
							best_post_div = post_div;
							best_ref_div = ref_div;
							best_feedback_div = feedback_div;
							best_frac_feedback_div = frac_feedback_div;
							best_freq = current_freq;
							best_error = error;
							best_vco_diff = vco_diff;
						} else if (((pll->flags & RADEON_PLL_PREFER_LOW_REF_DIV) && (ref_div < best_ref_div)) ||
							   ((pll->flags & RADEON_PLL_PREFER_HIGH_REF_DIV) && (ref_div > best_ref_div)) ||
							   ((pll->flags & RADEON_PLL_PREFER_LOW_FB_DIV) && (feedback_div < best_feedback_div)) ||
							   ((pll->flags & RADEON_PLL_PREFER_HIGH_FB_DIV) && (feedback_div > best_feedback_div)) ||
							   ((pll->flags & RADEON_PLL_PREFER_LOW_POST_DIV) && (post_div < best_post_div)) ||
							   ((pll->flags & RADEON_PLL_PREFER_HIGH_POST_DIV) && (post_div > best_post_div))) {
							best_post_div = post_div;
							best_ref_div = ref_div;
							best_feedback_div = feedback_div;
							best_frac_feedback_div = frac_feedback_div;
							best_freq = current_freq;
							best_error = error;
							best_vco_diff = vco_diff;
						}
					}
					if (current_freq < freq)
						min_frac_feed_div = frac_feedback_div + 1;
					else
						max_frac_feed_div = frac_feedback_div;
				}
				if (current_freq < freq)
					min_feed_div = feedback_div + 1;
				else
					max_feed_div = feedback_div;
			}
		}
	}

	*dot_clock_p = best_freq / 10000;
	*fb_div_p = best_feedback_div;
	*frac_fb_div_p = best_frac_feedback_div;
	*ref_div_p = best_ref_div;
	*post_div_p = best_post_div;
	DRM_DEBUG_KMS("%lld %d, pll dividers - fb: %d.%d ref: %d, post %d\n",
		      (long long)freq,
		      best_freq / 1000, best_feedback_div, best_frac_feedback_div,
		      best_ref_div, best_post_div);

}

static void radeon_user_framebuffer_destroy(struct drm_framebuffer *fb)
{
	struct radeon_framebuffer *radeon_fb = to_radeon_framebuffer(fb);

	if (radeon_fb->obj) {
		drm_gem_object_unreference_unlocked(radeon_fb->obj);
	}
	drm_framebuffer_cleanup(fb);
	kfree(radeon_fb);
}

static int radeon_user_framebuffer_create_handle(struct drm_framebuffer *fb,
						  struct drm_file *file_priv,
						  unsigned int *handle)
{
	struct radeon_framebuffer *radeon_fb = to_radeon_framebuffer(fb);

	return drm_gem_handle_create(file_priv, radeon_fb->obj, handle);
}

static const struct drm_framebuffer_funcs radeon_fb_funcs = {
	.destroy = radeon_user_framebuffer_destroy,
	.create_handle = radeon_user_framebuffer_create_handle,
};

int
radeon_framebuffer_init(struct drm_device *dev,
			struct radeon_framebuffer *rfb,
			struct drm_mode_fb_cmd2 *mode_cmd,
			struct drm_gem_object *obj)
{
	int ret;
	rfb->obj = obj;
	drm_helper_mode_fill_fb_struct(&rfb->base, mode_cmd);
	ret = drm_framebuffer_init(dev, &rfb->base, &radeon_fb_funcs);
	if (ret) {
		rfb->obj = NULL;
		return ret;
	}
	return 0;
}

static struct drm_framebuffer *
radeon_user_framebuffer_create(struct drm_device *dev,
			       struct drm_file *file_priv,
			       struct drm_mode_fb_cmd2 *mode_cmd)
{
	struct drm_gem_object *obj;
	struct radeon_framebuffer *radeon_fb;
	int ret;

	obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
	if (obj ==  NULL) {
		dev_err(&dev->pdev->dev, "No GEM object associated to handle 0x%08X, "
			"can't create framebuffer\n", mode_cmd->handles[0]);
		return ERR_PTR(-ENOENT);
	}

	radeon_fb = kzalloc(sizeof(*radeon_fb), GFP_KERNEL);
	if (radeon_fb == NULL) {
		drm_gem_object_unreference_unlocked(obj);
		return ERR_PTR(-ENOMEM);
	}

	ret = radeon_framebuffer_init(dev, radeon_fb, mode_cmd, obj);
	if (ret) {
		kfree(radeon_fb);
		drm_gem_object_unreference_unlocked(obj);
		return ERR_PTR(ret);
	}

	return &radeon_fb->base;
}

static void radeon_output_poll_changed(struct drm_device *dev)
{
	struct radeon_device *rdev = dev->dev_private;
	radeon_fb_output_poll_changed(rdev);
}

static const struct drm_mode_config_funcs radeon_mode_funcs = {
	.fb_create = radeon_user_framebuffer_create,
	.output_poll_changed = radeon_output_poll_changed
};

static struct drm_prop_enum_list radeon_tmds_pll_enum_list[] =
{	{ 0, "driver" },
	{ 1, "bios" },
};

static struct drm_prop_enum_list radeon_tv_std_enum_list[] =
{	{ TV_STD_NTSC, "ntsc" },
	{ TV_STD_PAL, "pal" },
	{ TV_STD_PAL_M, "pal-m" },
	{ TV_STD_PAL_60, "pal-60" },
	{ TV_STD_NTSC_J, "ntsc-j" },
	{ TV_STD_SCART_PAL, "scart-pal" },
	{ TV_STD_PAL_CN, "pal-cn" },
	{ TV_STD_SECAM, "secam" },
};

static struct drm_prop_enum_list radeon_underscan_enum_list[] =
{	{ UNDERSCAN_OFF, "off" },
	{ UNDERSCAN_ON, "on" },
	{ UNDERSCAN_AUTO, "auto" },
};

static struct drm_prop_enum_list radeon_audio_enum_list[] =
{	{ RADEON_AUDIO_DISABLE, "off" },
	{ RADEON_AUDIO_ENABLE, "on" },
	{ RADEON_AUDIO_AUTO, "auto" },
};

/* XXX support different dither options? spatial, temporal, both, etc. */
static struct drm_prop_enum_list radeon_dither_enum_list[] =
{	{ RADEON_FMT_DITHER_DISABLE, "off" },
	{ RADEON_FMT_DITHER_ENABLE, "on" },
};

static int radeon_modeset_create_props(struct radeon_device *rdev)
{
	int sz;

	if (rdev->is_atom_bios) {
		rdev->mode_info.coherent_mode_property =
			drm_property_create_range(rdev->ddev, 0 , "coherent", 0, 1);
		if (!rdev->mode_info.coherent_mode_property)
			return -ENOMEM;
	}

	if (!ASIC_IS_AVIVO(rdev)) {
		sz = ARRAY_SIZE(radeon_tmds_pll_enum_list);
		rdev->mode_info.tmds_pll_property =
			drm_property_create_enum(rdev->ddev, 0,
					    "tmds_pll",
					    radeon_tmds_pll_enum_list, sz);
	}

	rdev->mode_info.load_detect_property =
		drm_property_create_range(rdev->ddev, 0, "load detection", 0, 1);
	if (!rdev->mode_info.load_detect_property)
		return -ENOMEM;

	drm_mode_create_scaling_mode_property(rdev->ddev);

	sz = ARRAY_SIZE(radeon_tv_std_enum_list);
	rdev->mode_info.tv_std_property =
		drm_property_create_enum(rdev->ddev, 0,
				    "tv standard",
				    radeon_tv_std_enum_list, sz);

	sz = ARRAY_SIZE(radeon_underscan_enum_list);
	rdev->mode_info.underscan_property =
		drm_property_create_enum(rdev->ddev, 0,
				    "underscan",
				    radeon_underscan_enum_list, sz);

	rdev->mode_info.underscan_hborder_property =
		drm_property_create_range(rdev->ddev, 0,
					"underscan hborder", 0, 128);
	if (!rdev->mode_info.underscan_hborder_property)
		return -ENOMEM;

	rdev->mode_info.underscan_vborder_property =
		drm_property_create_range(rdev->ddev, 0,
					"underscan vborder", 0, 128);
	if (!rdev->mode_info.underscan_vborder_property)
		return -ENOMEM;

	sz = ARRAY_SIZE(radeon_audio_enum_list);
	rdev->mode_info.audio_property =
		drm_property_create_enum(rdev->ddev, 0,
					 "audio",
					 radeon_audio_enum_list, sz);

	sz = ARRAY_SIZE(radeon_dither_enum_list);
	rdev->mode_info.dither_property =
		drm_property_create_enum(rdev->ddev, 0,
					 "dither",
					 radeon_dither_enum_list, sz);

	return 0;
}

void radeon_update_display_priority(struct radeon_device *rdev)
{
	/* adjustment options for the display watermarks */
	if ((radeon_disp_priority == 0) || (radeon_disp_priority > 2)) {
		/* set display priority to high for r3xx, rv515 chips
		 * this avoids flickering due to underflow to the
		 * display controllers during heavy acceleration.
		 * Don't force high on rs4xx igp chips as it seems to
		 * affect the sound card.  See kernel bug 15982.
		 */
		if ((ASIC_IS_R300(rdev) || (rdev->family == CHIP_RV515)) &&
		    !(rdev->flags & RADEON_IS_IGP))
			rdev->disp_priority = 2;
		else
			rdev->disp_priority = 0;
	} else
		rdev->disp_priority = radeon_disp_priority;

}

/*
 * Allocate hdmi structs and determine register offsets
 */
static void radeon_afmt_init(struct radeon_device *rdev)
{
	int i;

	for (i = 0; i < RADEON_MAX_AFMT_BLOCKS; i++)
		rdev->mode_info.afmt[i] = NULL;

	if (ASIC_IS_NODCE(rdev)) {
		/* nothing to do */
	} else if (ASIC_IS_DCE4(rdev)) {
		static uint32_t eg_offsets[] = {
			EVERGREEN_CRTC0_REGISTER_OFFSET,
			EVERGREEN_CRTC1_REGISTER_OFFSET,
			EVERGREEN_CRTC2_REGISTER_OFFSET,
			EVERGREEN_CRTC3_REGISTER_OFFSET,
			EVERGREEN_CRTC4_REGISTER_OFFSET,
			EVERGREEN_CRTC5_REGISTER_OFFSET,
			0x13830 - 0x7030,
		};
		int num_afmt;

		/* DCE8 has 7 audio blocks tied to DIG encoders */
		/* DCE6 has 6 audio blocks tied to DIG encoders */
		/* DCE4/5 has 6 audio blocks tied to DIG encoders */
		/* DCE4.1 has 2 audio blocks tied to DIG encoders */
		if (ASIC_IS_DCE8(rdev))
			num_afmt = 7;
		else if (ASIC_IS_DCE6(rdev))
			num_afmt = 6;
		else if (ASIC_IS_DCE5(rdev))
			num_afmt = 6;
		else if (ASIC_IS_DCE41(rdev))
			num_afmt = 2;
		else /* DCE4 */
			num_afmt = 6;

		BUG_ON(num_afmt > ARRAY_SIZE(eg_offsets));
		for (i = 0; i < num_afmt; i++) {
			rdev->mode_info.afmt[i] = kzalloc(sizeof(struct radeon_afmt), GFP_KERNEL);
			if (rdev->mode_info.afmt[i]) {
				rdev->mode_info.afmt[i]->offset = eg_offsets[i];
				rdev->mode_info.afmt[i]->id = i;
			}
		}
	} else if (ASIC_IS_DCE3(rdev)) {
		/* DCE3.x has 2 audio blocks tied to DIG encoders */
		rdev->mode_info.afmt[0] = kzalloc(sizeof(struct radeon_afmt), GFP_KERNEL);
		if (rdev->mode_info.afmt[0]) {
			rdev->mode_info.afmt[0]->offset = DCE3_HDMI_OFFSET0;
			rdev->mode_info.afmt[0]->id = 0;
		}
		rdev->mode_info.afmt[1] = kzalloc(sizeof(struct radeon_afmt), GFP_KERNEL);
		if (rdev->mode_info.afmt[1]) {
			rdev->mode_info.afmt[1]->offset = DCE3_HDMI_OFFSET1;
			rdev->mode_info.afmt[1]->id = 1;
		}
	} else if (ASIC_IS_DCE2(rdev)) {
		/* DCE2 has at least 1 routable audio block */
		rdev->mode_info.afmt[0] = kzalloc(sizeof(struct radeon_afmt), GFP_KERNEL);
		if (rdev->mode_info.afmt[0]) {
			rdev->mode_info.afmt[0]->offset = DCE2_HDMI_OFFSET0;
			rdev->mode_info.afmt[0]->id = 0;
		}
		/* r6xx has 2 routable audio blocks */
		if (rdev->family >= CHIP_R600) {
			rdev->mode_info.afmt[1] = kzalloc(sizeof(struct radeon_afmt), GFP_KERNEL);
			if (rdev->mode_info.afmt[1]) {
				rdev->mode_info.afmt[1]->offset = DCE2_HDMI_OFFSET1;
				rdev->mode_info.afmt[1]->id = 1;
			}
		}
	}
}

static void radeon_afmt_fini(struct radeon_device *rdev)
{
	int i;

	for (i = 0; i < RADEON_MAX_AFMT_BLOCKS; i++) {
		kfree(rdev->mode_info.afmt[i]);
		rdev->mode_info.afmt[i] = NULL;
	}
}

int radeon_modeset_init(struct radeon_device *rdev)
{
	int i;
	int ret;

	drm_mode_config_init(rdev->ddev);
	rdev->mode_info.mode_config_initialized = true;

	rdev->ddev->mode_config.funcs = &radeon_mode_funcs;

	if (ASIC_IS_DCE5(rdev)) {
		rdev->ddev->mode_config.max_width = 16384;
		rdev->ddev->mode_config.max_height = 16384;
	} else if (ASIC_IS_AVIVO(rdev)) {
		rdev->ddev->mode_config.max_width = 8192;
		rdev->ddev->mode_config.max_height = 8192;
	} else {
		rdev->ddev->mode_config.max_width = 4096;
		rdev->ddev->mode_config.max_height = 4096;
	}

	rdev->ddev->mode_config.preferred_depth = 24;
	rdev->ddev->mode_config.prefer_shadow = 1;

	rdev->ddev->mode_config.fb_base = rdev->mc.aper_base;

	ret = radeon_modeset_create_props(rdev);
	if (ret) {
		return ret;
	}

	/* init i2c buses */
	radeon_i2c_init(rdev);

	/* check combios for a valid hardcoded EDID - Sun servers */
	if (!rdev->is_atom_bios) {
		/* check for hardcoded EDID in BIOS */
		radeon_combios_check_hardcoded_edid(rdev);
	}

	/* allocate crtcs */
	for (i = 0; i < rdev->num_crtc; i++) {
		radeon_crtc_init(rdev->ddev, i);
	}

	/* okay we should have all the bios connectors */
	ret = radeon_setup_enc_conn(rdev->ddev);
	if (!ret) {
		return ret;
	}

	/* init dig PHYs, disp eng pll */
	if (rdev->is_atom_bios) {
		radeon_atom_encoder_init(rdev);
		radeon_atom_disp_eng_pll_init(rdev);
	}

	/* initialize hpd */
	radeon_hpd_init(rdev);

	/* setup afmt */
	radeon_afmt_init(rdev);

	radeon_fbdev_init(rdev);
	drm_kms_helper_poll_init(rdev->ddev);

	if (rdev->pm.dpm_enabled) {
		/* do dpm late init */
		ret = radeon_pm_late_init(rdev);
		if (ret) {
			rdev->pm.dpm_enabled = false;
			DRM_ERROR("radeon_pm_late_init failed, disabling dpm\n");
		}
		/* set the dpm state for PX since there won't be
		 * a modeset to call this.
		 */
		radeon_pm_compute_clocks(rdev);
	}

	return 0;
}

void radeon_modeset_fini(struct radeon_device *rdev)
{
	radeon_fbdev_fini(rdev);
	kfree(rdev->mode_info.bios_hardcoded_edid);

	if (rdev->mode_info.mode_config_initialized) {
		radeon_afmt_fini(rdev);
		drm_kms_helper_poll_fini(rdev->ddev);
		radeon_hpd_fini(rdev);
		drm_mode_config_cleanup(rdev->ddev);
		rdev->mode_info.mode_config_initialized = false;
	}
	/* free i2c buses */
	radeon_i2c_fini(rdev);
}

static bool is_hdtv_mode(const struct drm_display_mode *mode)
{
	/* try and guess if this is a tv or a monitor */
	if ((mode->vdisplay == 480 && mode->hdisplay == 720) || /* 480p */
	    (mode->vdisplay == 576) || /* 576p */
	    (mode->vdisplay == 720) || /* 720p */
	    (mode->vdisplay == 1080)) /* 1080p */
		return true;
	else
		return false;
}

bool radeon_crtc_scaling_mode_fixup(struct drm_crtc *crtc,
				const struct drm_display_mode *mode,
				struct drm_display_mode *adjusted_mode)
{
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct drm_encoder *encoder;
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	struct radeon_encoder *radeon_encoder;
	struct drm_connector *connector;
	struct radeon_connector *radeon_connector;
	bool first = true;
	u32 src_v = 1, dst_v = 1;
	u32 src_h = 1, dst_h = 1;

	radeon_crtc->h_border = 0;
	radeon_crtc->v_border = 0;

	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
		if (encoder->crtc != crtc)
			continue;
		radeon_encoder = to_radeon_encoder(encoder);
		connector = radeon_get_connector_for_encoder(encoder);
		radeon_connector = to_radeon_connector(connector);

		if (first) {
			/* set scaling */
			if (radeon_encoder->rmx_type == RMX_OFF)
				radeon_crtc->rmx_type = RMX_OFF;
			else if (mode->hdisplay < radeon_encoder->native_mode.hdisplay ||
				 mode->vdisplay < radeon_encoder->native_mode.vdisplay)
				radeon_crtc->rmx_type = radeon_encoder->rmx_type;
			else
				radeon_crtc->rmx_type = RMX_OFF;
			/* copy native mode */
			memcpy(&radeon_crtc->native_mode,
			       &radeon_encoder->native_mode,
				sizeof(struct drm_display_mode));
			src_v = crtc->mode.vdisplay;
			dst_v = radeon_crtc->native_mode.vdisplay;
			src_h = crtc->mode.hdisplay;
			dst_h = radeon_crtc->native_mode.hdisplay;

			/* fix up for overscan on hdmi */
			if (ASIC_IS_AVIVO(rdev) &&
			    (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) &&
			    ((radeon_encoder->underscan_type == UNDERSCAN_ON) ||
			     ((radeon_encoder->underscan_type == UNDERSCAN_AUTO) &&
			      drm_detect_hdmi_monitor(radeon_connector_edid(connector)) &&
			      is_hdtv_mode(mode)))) {
				if (radeon_encoder->underscan_hborder != 0)
					radeon_crtc->h_border = radeon_encoder->underscan_hborder;
				else
					radeon_crtc->h_border = (mode->hdisplay >> 5) + 16;
				if (radeon_encoder->underscan_vborder != 0)
					radeon_crtc->v_border = radeon_encoder->underscan_vborder;
				else
					radeon_crtc->v_border = (mode->vdisplay >> 5) + 16;
				radeon_crtc->rmx_type = RMX_FULL;
				src_v = crtc->mode.vdisplay;
				dst_v = crtc->mode.vdisplay - (radeon_crtc->v_border * 2);
				src_h = crtc->mode.hdisplay;
				dst_h = crtc->mode.hdisplay - (radeon_crtc->h_border * 2);
			}
			first = false;
		} else {
			if (radeon_crtc->rmx_type != radeon_encoder->rmx_type) {
				/* WARNING: Right now this can't happen but
				 * in the future we need to check that scaling
				 * are consistent across different encoder
				 * (ie all encoder can work with the same
				 *  scaling).
				 */
				DRM_ERROR("Scaling not consistent across encoder.\n");
				return false;
			}
		}
	}
	if (radeon_crtc->rmx_type != RMX_OFF) {
		fixed20_12 a, b;
		a.full = dfixed_const(src_v);
		b.full = dfixed_const(dst_v);
		radeon_crtc->vsc.full = dfixed_div(a, b);
		a.full = dfixed_const(src_h);
		b.full = dfixed_const(dst_h);
		radeon_crtc->hsc.full = dfixed_div(a, b);
	} else {
		radeon_crtc->vsc.full = dfixed_const(1);
		radeon_crtc->hsc.full = dfixed_const(1);
	}
	return true;
}

/*
 * Retrieve current video scanout position of crtc on a given gpu, and
 * an optional accurate timestamp of when query happened.
 *
 * \param dev Device to query.
 * \param crtc Crtc to query.
 * \param flags Flags from caller (DRM_CALLED_FROM_VBLIRQ or 0).
 * \param *vpos Location where vertical scanout position should be stored.
 * \param *hpos Location where horizontal scanout position should go.
 * \param *stime Target location for timestamp taken immediately before
 *               scanout position query. Can be NULL to skip timestamp.
 * \param *etime Target location for timestamp taken immediately after
 *               scanout position query. Can be NULL to skip timestamp.
 *
 * Returns vpos as a positive number while in active scanout area.
 * Returns vpos as a negative number inside vblank, counting the number
 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
 * until start of active scanout / end of vblank."
 *
 * \return Flags, or'ed together as follows:
 *
 * DRM_SCANOUTPOS_VALID = Query successful.
 * DRM_SCANOUTPOS_INVBL = Inside vblank.
 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
 * this flag means that returned position may be offset by a constant but
 * unknown small number of scanlines wrt. real scanout position.
 *
 */
int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc, unsigned int flags,
			       int *vpos, int *hpos, ktime_t *stime, ktime_t *etime)
{
	u32 stat_crtc = 0, vbl = 0, position = 0;
	int vbl_start, vbl_end, vtotal, ret = 0;
	bool in_vbl = true;

	struct radeon_device *rdev = dev->dev_private;

	/* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */

	/* Get optional system timestamp before query. */
	if (stime)
		*stime = ktime_get();

	if (ASIC_IS_DCE4(rdev)) {
		if (crtc == 0) {
			vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
				     EVERGREEN_CRTC0_REGISTER_OFFSET);
			position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
					  EVERGREEN_CRTC0_REGISTER_OFFSET);
			ret |= DRM_SCANOUTPOS_VALID;
		}
		if (crtc == 1) {
			vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
				     EVERGREEN_CRTC1_REGISTER_OFFSET);
			position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
					  EVERGREEN_CRTC1_REGISTER_OFFSET);
			ret |= DRM_SCANOUTPOS_VALID;
		}
		if (crtc == 2) {
			vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
				     EVERGREEN_CRTC2_REGISTER_OFFSET);
			position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
					  EVERGREEN_CRTC2_REGISTER_OFFSET);
			ret |= DRM_SCANOUTPOS_VALID;
		}
		if (crtc == 3) {
			vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
				     EVERGREEN_CRTC3_REGISTER_OFFSET);
			position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
					  EVERGREEN_CRTC3_REGISTER_OFFSET);
			ret |= DRM_SCANOUTPOS_VALID;
		}
		if (crtc == 4) {
			vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
				     EVERGREEN_CRTC4_REGISTER_OFFSET);
			position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
					  EVERGREEN_CRTC4_REGISTER_OFFSET);
			ret |= DRM_SCANOUTPOS_VALID;
		}
		if (crtc == 5) {
			vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END +
				     EVERGREEN_CRTC5_REGISTER_OFFSET);
			position = RREG32(EVERGREEN_CRTC_STATUS_POSITION +
					  EVERGREEN_CRTC5_REGISTER_OFFSET);
			ret |= DRM_SCANOUTPOS_VALID;
		}
	} else if (ASIC_IS_AVIVO(rdev)) {
		if (crtc == 0) {
			vbl = RREG32(AVIVO_D1CRTC_V_BLANK_START_END);
			position = RREG32(AVIVO_D1CRTC_STATUS_POSITION);
			ret |= DRM_SCANOUTPOS_VALID;
		}
		if (crtc == 1) {
			vbl = RREG32(AVIVO_D2CRTC_V_BLANK_START_END);
			position = RREG32(AVIVO_D2CRTC_STATUS_POSITION);
			ret |= DRM_SCANOUTPOS_VALID;
		}
	} else {
		/* Pre-AVIVO: Different encoding of scanout pos and vblank interval. */
		if (crtc == 0) {
			/* Assume vbl_end == 0, get vbl_start from
			 * upper 16 bits.
			 */
			vbl = (RREG32(RADEON_CRTC_V_TOTAL_DISP) &
				RADEON_CRTC_V_DISP) >> RADEON_CRTC_V_DISP_SHIFT;
			/* Only retrieve vpos from upper 16 bits, set hpos == 0. */
			position = (RREG32(RADEON_CRTC_VLINE_CRNT_VLINE) >> 16) & RADEON_CRTC_V_TOTAL;
			stat_crtc = RREG32(RADEON_CRTC_STATUS);
			if (!(stat_crtc & 1))
				in_vbl = false;

			ret |= DRM_SCANOUTPOS_VALID;
		}
		if (crtc == 1) {
			vbl = (RREG32(RADEON_CRTC2_V_TOTAL_DISP) &
				RADEON_CRTC_V_DISP) >> RADEON_CRTC_V_DISP_SHIFT;
			position = (RREG32(RADEON_CRTC2_VLINE_CRNT_VLINE) >> 16) & RADEON_CRTC_V_TOTAL;
			stat_crtc = RREG32(RADEON_CRTC2_STATUS);
			if (!(stat_crtc & 1))
				in_vbl = false;

			ret |= DRM_SCANOUTPOS_VALID;
		}
	}

	/* Get optional system timestamp after query. */
	if (etime)
		*etime = ktime_get();

	/* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */

	/* Decode into vertical and horizontal scanout position. */
	*vpos = position & 0x1fff;
	*hpos = (position >> 16) & 0x1fff;

	/* Valid vblank area boundaries from gpu retrieved? */
	if (vbl > 0) {
		/* Yes: Decode. */
		ret |= DRM_SCANOUTPOS_ACCURATE;
		vbl_start = vbl & 0x1fff;
		vbl_end = (vbl >> 16) & 0x1fff;
	}
	else {
		/* No: Fake something reasonable which gives at least ok results. */
		vbl_start = rdev->mode_info.crtcs[crtc]->base.hwmode.crtc_vdisplay;
		vbl_end = 0;
	}

	/* Test scanout position against vblank region. */
	if ((*vpos < vbl_start) && (*vpos >= vbl_end))
		in_vbl = false;

	/* Check if inside vblank area and apply corrective offsets:
	 * vpos will then be >=0 in video scanout area, but negative
	 * within vblank area, counting down the number of lines until
	 * start of scanout.
	 */

	/* Inside "upper part" of vblank area? Apply corrective offset if so: */
	if (in_vbl && (*vpos >= vbl_start)) {
		vtotal = rdev->mode_info.crtcs[crtc]->base.hwmode.crtc_vtotal;
		*vpos = *vpos - vtotal;
	}

	/* Correct for shifted end of vbl at vbl_end. */
	*vpos = *vpos - vbl_end;

	/* In vblank? */
	if (in_vbl)
		ret |= DRM_SCANOUTPOS_IN_VBLANK;

	/* Is vpos outside nominal vblank area, but less than
	 * 1/100 of a frame height away from start of vblank?
	 * If so, assume this isn't a massively delayed vblank
	 * interrupt, but a vblank interrupt that fired a few
	 * microseconds before true start of vblank. Compensate
	 * by adding a full frame duration to the final timestamp.
	 * Happens, e.g., on ATI R500, R600.
	 *
	 * We only do this if DRM_CALLED_FROM_VBLIRQ.
	 */
	if ((flags & DRM_CALLED_FROM_VBLIRQ) && !in_vbl) {
		vbl_start = rdev->mode_info.crtcs[crtc]->base.hwmode.crtc_vdisplay;
		vtotal = rdev->mode_info.crtcs[crtc]->base.hwmode.crtc_vtotal;

		if (vbl_start - *vpos < vtotal / 100) {
			*vpos -= vtotal;

			/* Signal this correction as "applied". */
			ret |= 0x8;
		}
	}

	return ret;
}