aboutsummaryrefslogtreecommitdiff
path: root/drivers/video/sh_mobile_lcdcfb.c
blob: 0264704a52be3d9e02b23178e489b2e567ec4c56 (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
/*
 * SuperH Mobile LCDC Framebuffer
 *
 * Copyright (c) 2008 Magnus Damm
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#include <linux/atomic.h>
#include <linux/backlight.h>
#include <linux/clk.h>
#include <linux/console.h>
#include <linux/ctype.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ioctl.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <linux/vmalloc.h>

#include <video/sh_mobile_lcdc.h>
#include <video/sh_mobile_meram.h>

#include "sh_mobile_lcdcfb.h"

/* ----------------------------------------------------------------------------
 * Overlay register definitions
 */

#define LDBCR			0xb00
#define LDBCR_UPC(n)		(1 << ((n) + 16))
#define LDBCR_UPF(n)		(1 << ((n) + 8))
#define LDBCR_UPD(n)		(1 << ((n) + 0))
#define LDBnBSIFR(n)		(0xb20 + (n) * 0x20 + 0x00)
#define LDBBSIFR_EN		(1 << 31)
#define LDBBSIFR_VS		(1 << 29)
#define LDBBSIFR_BRSEL		(1 << 28)
#define LDBBSIFR_MX		(1 << 27)
#define LDBBSIFR_MY		(1 << 26)
#define LDBBSIFR_CV3		(3 << 24)
#define LDBBSIFR_CV2		(2 << 24)
#define LDBBSIFR_CV1		(1 << 24)
#define LDBBSIFR_CV0		(0 << 24)
#define LDBBSIFR_CV_MASK	(3 << 24)
#define LDBBSIFR_LAY_MASK	(0xff << 16)
#define LDBBSIFR_LAY_SHIFT	16
#define LDBBSIFR_ROP3_MASK	(0xff << 16)
#define LDBBSIFR_ROP3_SHIFT	16
#define LDBBSIFR_AL_PL8		(3 << 14)
#define LDBBSIFR_AL_PL1		(2 << 14)
#define LDBBSIFR_AL_PK		(1 << 14)
#define LDBBSIFR_AL_1		(0 << 14)
#define LDBBSIFR_AL_MASK	(3 << 14)
#define LDBBSIFR_SWPL		(1 << 10)
#define LDBBSIFR_SWPW		(1 << 9)
#define LDBBSIFR_SWPB		(1 << 8)
#define LDBBSIFR_RY		(1 << 7)
#define LDBBSIFR_CHRR_420	(2 << 0)
#define LDBBSIFR_CHRR_422	(1 << 0)
#define LDBBSIFR_CHRR_444	(0 << 0)
#define LDBBSIFR_RPKF_ARGB32	(0x00 << 0)
#define LDBBSIFR_RPKF_RGB16	(0x03 << 0)
#define LDBBSIFR_RPKF_RGB24	(0x0b << 0)
#define LDBBSIFR_RPKF_MASK	(0x1f << 0)
#define LDBnBSSZR(n)		(0xb20 + (n) * 0x20 + 0x04)
#define LDBBSSZR_BVSS_MASK	(0xfff << 16)
#define LDBBSSZR_BVSS_SHIFT	16
#define LDBBSSZR_BHSS_MASK	(0xfff << 0)
#define LDBBSSZR_BHSS_SHIFT	0
#define LDBnBLOCR(n)		(0xb20 + (n) * 0x20 + 0x08)
#define LDBBLOCR_CVLC_MASK	(0xfff << 16)
#define LDBBLOCR_CVLC_SHIFT	16
#define LDBBLOCR_CHLC_MASK	(0xfff << 0)
#define LDBBLOCR_CHLC_SHIFT	0
#define LDBnBSMWR(n)		(0xb20 + (n) * 0x20 + 0x0c)
#define LDBBSMWR_BSMWA_MASK	(0xffff << 16)
#define LDBBSMWR_BSMWA_SHIFT	16
#define LDBBSMWR_BSMW_MASK	(0xffff << 0)
#define LDBBSMWR_BSMW_SHIFT	0
#define LDBnBSAYR(n)		(0xb20 + (n) * 0x20 + 0x10)
#define LDBBSAYR_FG1A_MASK	(0xff << 24)
#define LDBBSAYR_FG1A_SHIFT	24
#define LDBBSAYR_FG1R_MASK	(0xff << 16)
#define LDBBSAYR_FG1R_SHIFT	16
#define LDBBSAYR_FG1G_MASK	(0xff << 8)
#define LDBBSAYR_FG1G_SHIFT	8
#define LDBBSAYR_FG1B_MASK	(0xff << 0)
#define LDBBSAYR_FG1B_SHIFT	0
#define LDBnBSACR(n)		(0xb20 + (n) * 0x20 + 0x14)
#define LDBBSACR_FG2A_MASK	(0xff << 24)
#define LDBBSACR_FG2A_SHIFT	24
#define LDBBSACR_FG2R_MASK	(0xff << 16)
#define LDBBSACR_FG2R_SHIFT	16
#define LDBBSACR_FG2G_MASK	(0xff << 8)
#define LDBBSACR_FG2G_SHIFT	8
#define LDBBSACR_FG2B_MASK	(0xff << 0)
#define LDBBSACR_FG2B_SHIFT	0
#define LDBnBSAAR(n)		(0xb20 + (n) * 0x20 + 0x18)
#define LDBBSAAR_AP_MASK	(0xff << 24)
#define LDBBSAAR_AP_SHIFT	24
#define LDBBSAAR_R_MASK		(0xff << 16)
#define LDBBSAAR_R_SHIFT	16
#define LDBBSAAR_GY_MASK	(0xff << 8)
#define LDBBSAAR_GY_SHIFT	8
#define LDBBSAAR_B_MASK		(0xff << 0)
#define LDBBSAAR_B_SHIFT	0
#define LDBnBPPCR(n)		(0xb20 + (n) * 0x20 + 0x1c)
#define LDBBPPCR_AP_MASK	(0xff << 24)
#define LDBBPPCR_AP_SHIFT	24
#define LDBBPPCR_R_MASK		(0xff << 16)
#define LDBBPPCR_R_SHIFT	16
#define LDBBPPCR_GY_MASK	(0xff << 8)
#define LDBBPPCR_GY_SHIFT	8
#define LDBBPPCR_B_MASK		(0xff << 0)
#define LDBBPPCR_B_SHIFT	0
#define LDBnBBGCL(n)		(0xb10 + (n) * 0x04)
#define LDBBBGCL_BGA_MASK	(0xff << 24)
#define LDBBBGCL_BGA_SHIFT	24
#define LDBBBGCL_BGR_MASK	(0xff << 16)
#define LDBBBGCL_BGR_SHIFT	16
#define LDBBBGCL_BGG_MASK	(0xff << 8)
#define LDBBBGCL_BGG_SHIFT	8
#define LDBBBGCL_BGB_MASK	(0xff << 0)
#define LDBBBGCL_BGB_SHIFT	0

#define SIDE_B_OFFSET 0x1000
#define MIRROR_OFFSET 0x2000

#define MAX_XRES 1920
#define MAX_YRES 1080

enum sh_mobile_lcdc_overlay_mode {
	LCDC_OVERLAY_BLEND,
	LCDC_OVERLAY_ROP3,
};

/*
 * struct sh_mobile_lcdc_overlay - LCDC display overlay
 *
 * @channel: LCDC channel this overlay belongs to
 * @cfg: Overlay configuration
 * @info: Frame buffer device
 * @index: Overlay index (0-3)
 * @base: Overlay registers base address
 * @enabled: True if the overlay is enabled
 * @mode: Overlay blending mode (alpha blend or ROP3)
 * @alpha: Global alpha blending value (0-255, for alpha blending mode)
 * @rop3: Raster operation (for ROP3 mode)
 * @fb_mem: Frame buffer virtual memory address
 * @fb_size: Frame buffer size in bytes
 * @dma_handle: Frame buffer DMA address
 * @base_addr_y: Overlay base address (RGB or luma component)
 * @base_addr_c: Overlay base address (chroma component)
 * @pan_y_offset: Panning linear offset in bytes (luma component)
 * @format: Current pixelf format
 * @xres: Horizontal visible resolution
 * @xres_virtual: Horizontal total resolution
 * @yres: Vertical visible resolution
 * @yres_virtual: Vertical total resolution
 * @pitch: Overlay line pitch
 * @pos_x: Horizontal overlay position
 * @pos_y: Vertical overlay position
 */
struct sh_mobile_lcdc_overlay {
	struct sh_mobile_lcdc_chan *channel;

	const struct sh_mobile_lcdc_overlay_cfg *cfg;
	struct fb_info *info;

	unsigned int index;
	unsigned long base;

	bool enabled;
	enum sh_mobile_lcdc_overlay_mode mode;
	unsigned int alpha;
	unsigned int rop3;

	void *fb_mem;
	unsigned long fb_size;

	dma_addr_t dma_handle;
	unsigned long base_addr_y;
	unsigned long base_addr_c;
	unsigned long pan_y_offset;

	const struct sh_mobile_lcdc_format_info *format;
	unsigned int xres;
	unsigned int xres_virtual;
	unsigned int yres;
	unsigned int yres_virtual;
	unsigned int pitch;
	int pos_x;
	int pos_y;
};

struct sh_mobile_lcdc_priv {
	void __iomem *base;
	int irq;
	atomic_t hw_usecnt;
	struct device *dev;
	struct clk *dot_clk;
	unsigned long lddckr;

	struct sh_mobile_lcdc_chan ch[2];
	struct sh_mobile_lcdc_overlay overlays[4];

	struct notifier_block notifier;
	int started;
	int forced_fourcc; /* 2 channel LCDC must share fourcc setting */
	struct sh_mobile_meram_info *meram_dev;
};

/* -----------------------------------------------------------------------------
 * Registers access
 */

static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
	[LDDCKPAT1R] = 0x400,
	[LDDCKPAT2R] = 0x404,
	[LDMT1R] = 0x418,
	[LDMT2R] = 0x41c,
	[LDMT3R] = 0x420,
	[LDDFR] = 0x424,
	[LDSM1R] = 0x428,
	[LDSM2R] = 0x42c,
	[LDSA1R] = 0x430,
	[LDSA2R] = 0x434,
	[LDMLSR] = 0x438,
	[LDHCNR] = 0x448,
	[LDHSYNR] = 0x44c,
	[LDVLNR] = 0x450,
	[LDVSYNR] = 0x454,
	[LDPMR] = 0x460,
	[LDHAJR] = 0x4a0,
};

static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
	[LDDCKPAT1R] = 0x408,
	[LDDCKPAT2R] = 0x40c,
	[LDMT1R] = 0x600,
	[LDMT2R] = 0x604,
	[LDMT3R] = 0x608,
	[LDDFR] = 0x60c,
	[LDSM1R] = 0x610,
	[LDSM2R] = 0x614,
	[LDSA1R] = 0x618,
	[LDMLSR] = 0x620,
	[LDHCNR] = 0x624,
	[LDHSYNR] = 0x628,
	[LDVLNR] = 0x62c,
	[LDVSYNR] = 0x630,
	[LDPMR] = 0x63c,
};

static bool banked(int reg_nr)
{
	switch (reg_nr) {
	case LDMT1R:
	case LDMT2R:
	case LDMT3R:
	case LDDFR:
	case LDSM1R:
	case LDSA1R:
	case LDSA2R:
	case LDMLSR:
	case LDHCNR:
	case LDHSYNR:
	case LDVLNR:
	case LDVSYNR:
		return true;
	}
	return false;
}

static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
{
	return chan->cfg->chan == LCDC_CHAN_SUBLCD;
}

static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
			    int reg_nr, unsigned long data)
{
	iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
	if (banked(reg_nr))
		iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
			  SIDE_B_OFFSET);
}

static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
			    int reg_nr, unsigned long data)
{
	iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
		  MIRROR_OFFSET);
}

static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
				    int reg_nr)
{
	return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
}

static void lcdc_write_overlay(struct sh_mobile_lcdc_overlay *ovl,
			       int reg, unsigned long data)
{
	iowrite32(data, ovl->channel->lcdc->base + reg);
	iowrite32(data, ovl->channel->lcdc->base + reg + SIDE_B_OFFSET);
}

static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
		       unsigned long reg_offs, unsigned long data)
{
	iowrite32(data, priv->base + reg_offs);
}

static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
			       unsigned long reg_offs)
{
	return ioread32(priv->base + reg_offs);
}

static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
			  unsigned long reg_offs,
			  unsigned long mask, unsigned long until)
{
	while ((lcdc_read(priv, reg_offs) & mask) != until)
		cpu_relax();
}

/* -----------------------------------------------------------------------------
 * Clock management
 */

static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
{
	if (atomic_inc_and_test(&priv->hw_usecnt)) {
		if (priv->dot_clk)
			clk_enable(priv->dot_clk);
		pm_runtime_get_sync(priv->dev);
		if (priv->meram_dev && priv->meram_dev->pdev)
			pm_runtime_get_sync(&priv->meram_dev->pdev->dev);
	}
}

static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
{
	if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
		if (priv->meram_dev && priv->meram_dev->pdev)
			pm_runtime_put_sync(&priv->meram_dev->pdev->dev);
		pm_runtime_put(priv->dev);
		if (priv->dot_clk)
			clk_disable(priv->dot_clk);
	}
}

static int sh_mobile_lcdc_setup_clocks(struct sh_mobile_lcdc_priv *priv,
				       int clock_source)
{
	struct clk *clk;
	char *str;

	switch (clock_source) {
	case LCDC_CLK_BUS:
		str = "bus_clk";
		priv->lddckr = LDDCKR_ICKSEL_BUS;
		break;
	case LCDC_CLK_PERIPHERAL:
		str = "peripheral_clk";
		priv->lddckr = LDDCKR_ICKSEL_MIPI;
		break;
	case LCDC_CLK_EXTERNAL:
		str = NULL;
		priv->lddckr = LDDCKR_ICKSEL_HDMI;
		break;
	default:
		return -EINVAL;
	}

	if (str == NULL)
		return 0;

	clk = clk_get(priv->dev, str);
	if (IS_ERR(clk)) {
		dev_err(priv->dev, "cannot get dot clock %s\n", str);
		return PTR_ERR(clk);
	}

	priv->dot_clk = clk;
	return 0;
}

/* -----------------------------------------------------------------------------
 * Display, panel and deferred I/O
 */

static void lcdc_sys_write_index(void *handle, unsigned long data)
{
	struct sh_mobile_lcdc_chan *ch = handle;

	lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT);
	lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
	lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
		   (lcdc_chan_is_sublcd(ch) ? 2 : 0));
	lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
}

static void lcdc_sys_write_data(void *handle, unsigned long data)
{
	struct sh_mobile_lcdc_chan *ch = handle;

	lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW);
	lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
	lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
		   (lcdc_chan_is_sublcd(ch) ? 2 : 0));
	lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
}

static unsigned long lcdc_sys_read_data(void *handle)
{
	struct sh_mobile_lcdc_chan *ch = handle;

	lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR);
	lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
	lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA |
		   (lcdc_chan_is_sublcd(ch) ? 2 : 0));
	udelay(1);
	lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);

	return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK;
}

static struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
	lcdc_sys_write_index,
	lcdc_sys_write_data,
	lcdc_sys_read_data,
};

static int sh_mobile_lcdc_sginit(struct fb_info *info,
				  struct list_head *pagelist)
{
	struct sh_mobile_lcdc_chan *ch = info->par;
	unsigned int nr_pages_max = ch->fb_size >> PAGE_SHIFT;
	struct page *page;
	int nr_pages = 0;

	sg_init_table(ch->sglist, nr_pages_max);

	list_for_each_entry(page, pagelist, lru)
		sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);

	return nr_pages;
}

static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
				       struct list_head *pagelist)
{
	struct sh_mobile_lcdc_chan *ch = info->par;
	const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;

	/* enable clocks before accessing hardware */
	sh_mobile_lcdc_clk_on(ch->lcdc);

	/*
	 * It's possible to get here without anything on the pagelist via
	 * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
	 * invocation. In the former case, the acceleration routines are
	 * stepped in to when using the framebuffer console causing the
	 * workqueue to be scheduled without any dirty pages on the list.
	 *
	 * Despite this, a panel update is still needed given that the
	 * acceleration routines have their own methods for writing in
	 * that still need to be updated.
	 *
	 * The fsync() and empty pagelist case could be optimized for,
	 * but we don't bother, as any application exhibiting such
	 * behaviour is fundamentally broken anyways.
	 */
	if (!list_empty(pagelist)) {
		unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);

		/* trigger panel update */
		dma_map_sg(ch->lcdc->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
		if (panel->start_transfer)
			panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
		lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
		dma_unmap_sg(ch->lcdc->dev, ch->sglist, nr_pages,
			     DMA_TO_DEVICE);
	} else {
		if (panel->start_transfer)
			panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
		lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
	}
}

static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
{
	struct fb_deferred_io *fbdefio = info->fbdefio;

	if (fbdefio)
		schedule_delayed_work(&info->deferred_work, fbdefio->delay);
}

static void sh_mobile_lcdc_display_on(struct sh_mobile_lcdc_chan *ch)
{
	const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;

	if (ch->tx_dev) {
		int ret;

		ret = ch->tx_dev->ops->display_on(ch->tx_dev);
		if (ret < 0)
			return;

		if (ret == SH_MOBILE_LCDC_DISPLAY_DISCONNECTED)
			ch->info->state = FBINFO_STATE_SUSPENDED;
	}

	/* HDMI must be enabled before LCDC configuration */
	if (panel->display_on)
		panel->display_on();
}

static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch)
{
	const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;

	if (panel->display_off)
		panel->display_off();

	if (ch->tx_dev)
		ch->tx_dev->ops->display_off(ch->tx_dev);
}

static bool
sh_mobile_lcdc_must_reconfigure(struct sh_mobile_lcdc_chan *ch,
				const struct fb_videomode *new_mode)
{
	dev_dbg(ch->info->dev, "Old %ux%u, new %ux%u\n",
		ch->display.mode.xres, ch->display.mode.yres,
		new_mode->xres, new_mode->yres);

	/* It can be a different monitor with an equal video-mode */
	if (fb_mode_is_equal(&ch->display.mode, new_mode))
		return false;

	dev_dbg(ch->info->dev, "Switching %u -> %u lines\n",
		ch->display.mode.yres, new_mode->yres);
	ch->display.mode = *new_mode;

	return true;
}

static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
				    struct fb_info *info);

static int sh_mobile_lcdc_display_notify(struct sh_mobile_lcdc_chan *ch,
					 enum sh_mobile_lcdc_entity_event event,
					 const struct fb_videomode *mode,
					 const struct fb_monspecs *monspec)
{
	struct fb_info *info = ch->info;
	struct fb_var_screeninfo var;
	int ret = 0;

	switch (event) {
	case SH_MOBILE_LCDC_EVENT_DISPLAY_CONNECT:
		/* HDMI plug in */
		if (lock_fb_info(info)) {
			console_lock();

			ch->display.width = monspec->max_x * 10;
			ch->display.height = monspec->max_y * 10;

			if (!sh_mobile_lcdc_must_reconfigure(ch, mode) &&
			    info->state == FBINFO_STATE_RUNNING) {
				/* First activation with the default monitor.
				 * Just turn on, if we run a resume here, the
				 * logo disappears.
				 */
				info->var.width = ch->display.width;
				info->var.height = ch->display.height;
				sh_mobile_lcdc_display_on(ch);
			} else {
				/* New monitor or have to wake up */
				fb_set_suspend(info, 0);
			}

			console_unlock();
			unlock_fb_info(info);
		}
		break;

	case SH_MOBILE_LCDC_EVENT_DISPLAY_DISCONNECT:
		/* HDMI disconnect */
		if (lock_fb_info(info)) {
			console_lock();
			fb_set_suspend(info, 1);
			console_unlock();
			unlock_fb_info(info);
		}
		break;

	case SH_MOBILE_LCDC_EVENT_DISPLAY_MODE:
		/* Validate a proposed new mode */
		fb_videomode_to_var(&var, mode);
		var.bits_per_pixel = info->var.bits_per_pixel;
		var.grayscale = info->var.grayscale;
		ret = sh_mobile_lcdc_check_var(&var, info);
		break;
	}

	return ret;
}

/* -----------------------------------------------------------------------------
 * Format helpers
 */

struct sh_mobile_lcdc_format_info {
	u32 fourcc;
	unsigned int bpp;
	bool yuv;
	u32 lddfr;
};

static const struct sh_mobile_lcdc_format_info sh_mobile_format_infos[] = {
	{
		.fourcc = V4L2_PIX_FMT_RGB565,
		.bpp = 16,
		.yuv = false,
		.lddfr = LDDFR_PKF_RGB16,
	}, {
		.fourcc = V4L2_PIX_FMT_BGR24,
		.bpp = 24,
		.yuv = false,
		.lddfr = LDDFR_PKF_RGB24,
	}, {
		.fourcc = V4L2_PIX_FMT_BGR32,
		.bpp = 32,
		.yuv = false,
		.lddfr = LDDFR_PKF_ARGB32,
	}, {
		.fourcc = V4L2_PIX_FMT_NV12,
		.bpp = 12,
		.yuv = true,
		.lddfr = LDDFR_CC | LDDFR_YF_420,
	}, {
		.fourcc = V4L2_PIX_FMT_NV21,
		.bpp = 12,
		.yuv = true,
		.lddfr = LDDFR_CC | LDDFR_YF_420,
	}, {
		.fourcc = V4L2_PIX_FMT_NV16,
		.bpp = 16,
		.yuv = true,
		.lddfr = LDDFR_CC | LDDFR_YF_422,
	}, {
		.fourcc = V4L2_PIX_FMT_NV61,
		.bpp = 16,
		.yuv = true,
		.lddfr = LDDFR_CC | LDDFR_YF_422,
	}, {
		.fourcc = V4L2_PIX_FMT_NV24,
		.bpp = 24,
		.yuv = true,
		.lddfr = LDDFR_CC | LDDFR_YF_444,
	}, {
		.fourcc = V4L2_PIX_FMT_NV42,
		.bpp = 24,
		.yuv = true,
		.lddfr = LDDFR_CC | LDDFR_YF_444,
	},
};

static const struct sh_mobile_lcdc_format_info *
sh_mobile_format_info(u32 fourcc)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(sh_mobile_format_infos); ++i) {
		if (sh_mobile_format_infos[i].fourcc == fourcc)
			return &sh_mobile_format_infos[i];
	}

	return NULL;
}

static int sh_mobile_format_fourcc(const struct fb_var_screeninfo *var)
{
	if (var->grayscale > 1)
		return var->grayscale;

	switch (var->bits_per_pixel) {
	case 16:
		return V4L2_PIX_FMT_RGB565;
	case 24:
		return V4L2_PIX_FMT_BGR24;
	case 32:
		return V4L2_PIX_FMT_BGR32;
	default:
		return 0;
	}
}

static int sh_mobile_format_is_fourcc(const struct fb_var_screeninfo *var)
{
	return var->grayscale > 1;
}

/* -----------------------------------------------------------------------------
 * Start, stop and IRQ
 */

static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
{
	struct sh_mobile_lcdc_priv *priv = data;
	struct sh_mobile_lcdc_chan *ch;
	unsigned long ldintr;
	int is_sub;
	int k;

	/* Acknowledge interrupts and disable further VSYNC End IRQs. */
	ldintr = lcdc_read(priv, _LDINTR);
	lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);

	/* figure out if this interrupt is for main or sub lcd */
	is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;

	/* wake up channel and disable clocks */
	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
		ch = &priv->ch[k];

		if (!ch->enabled)
			continue;

		/* Frame End */
		if (ldintr & LDINTR_FS) {
			if (is_sub == lcdc_chan_is_sublcd(ch)) {
				ch->frame_end = 1;
				wake_up(&ch->frame_end_wait);

				sh_mobile_lcdc_clk_off(priv);
			}
		}

		/* VSYNC End */
		if (ldintr & LDINTR_VES)
			complete(&ch->vsync_completion);
	}

	return IRQ_HANDLED;
}

static int sh_mobile_lcdc_wait_for_vsync(struct sh_mobile_lcdc_chan *ch)
{
	unsigned long ldintr;
	int ret;

	/* Enable VSync End interrupt and be careful not to acknowledge any
	 * pending interrupt.
	 */
	ldintr = lcdc_read(ch->lcdc, _LDINTR);
	ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
	lcdc_write(ch->lcdc, _LDINTR, ldintr);

	ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
							msecs_to_jiffies(100));
	if (!ret)
		return -ETIMEDOUT;

	return 0;
}

static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
				      int start)
{
	unsigned long tmp = lcdc_read(priv, _LDCNT2R);
	int k;

	/* start or stop the lcdc */
	if (start)
		lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
	else
		lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);

	/* wait until power is applied/stopped on all channels */
	for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
		if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
			while (1) {
				tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
				    & LDPMR_LPS;
				if (start && tmp == LDPMR_LPS)
					break;
				if (!start && tmp == 0)
					break;
				cpu_relax();
			}

	if (!start)
		lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
}

static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
{
	const struct fb_var_screeninfo *var = &ch->info->var;
	const struct fb_videomode *mode = &ch->display.mode;
	unsigned long h_total, hsync_pos, display_h_total;
	u32 tmp;

	tmp = ch->ldmt1r_value;
	tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
	tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
	tmp |= (ch->cfg->flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
	tmp |= (ch->cfg->flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
	tmp |= (ch->cfg->flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
	tmp |= (ch->cfg->flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
	tmp |= (ch->cfg->flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
	lcdc_write_chan(ch, LDMT1R, tmp);

	/* setup SYS bus */
	lcdc_write_chan(ch, LDMT2R, ch->cfg->sys_bus_cfg.ldmt2r);
	lcdc_write_chan(ch, LDMT3R, ch->cfg->sys_bus_cfg.ldmt3r);

	/* horizontal configuration */
	h_total = mode->xres + mode->hsync_len + mode->left_margin
		+ mode->right_margin;
	tmp = h_total / 8; /* HTCN */
	tmp |= (min(mode->xres, ch->xres) / 8) << 16; /* HDCN */
	lcdc_write_chan(ch, LDHCNR, tmp);

	hsync_pos = mode->xres + mode->right_margin;
	tmp = hsync_pos / 8; /* HSYNP */
	tmp |= (mode->hsync_len / 8) << 16; /* HSYNW */
	lcdc_write_chan(ch, LDHSYNR, tmp);

	/* vertical configuration */
	tmp = mode->yres + mode->vsync_len + mode->upper_margin
	    + mode->lower_margin; /* VTLN */
	tmp |= min(mode->yres, ch->yres) << 16; /* VDLN */
	lcdc_write_chan(ch, LDVLNR, tmp);

	tmp = mode->yres + mode->lower_margin; /* VSYNP */
	tmp |= mode->vsync_len << 16; /* VSYNW */
	lcdc_write_chan(ch, LDVSYNR, tmp);

	/* Adjust horizontal synchronisation for HDMI */
	display_h_total = mode->xres + mode->hsync_len + mode->left_margin
			+ mode->right_margin;
	tmp = ((mode->xres & 7) << 24) | ((display_h_total & 7) << 16)
	    | ((mode->hsync_len & 7) << 8) | (hsync_pos & 7);
	lcdc_write_chan(ch, LDHAJR, tmp);
	lcdc_write_chan_mirror(ch, LDHAJR, tmp);
}

static void sh_mobile_lcdc_overlay_setup(struct sh_mobile_lcdc_overlay *ovl)
{
	u32 format = 0;

	if (!ovl->enabled) {
		lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
		lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), 0);
		lcdc_write(ovl->channel->lcdc, LDBCR,
			   LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
		return;
	}

	ovl->base_addr_y = ovl->dma_handle;
	ovl->base_addr_c = ovl->dma_handle
			 + ovl->xres_virtual * ovl->yres_virtual;

	switch (ovl->mode) {
	case LCDC_OVERLAY_BLEND:
		format = LDBBSIFR_EN | (ovl->alpha << LDBBSIFR_LAY_SHIFT);
		break;

	case LCDC_OVERLAY_ROP3:
		format = LDBBSIFR_EN | LDBBSIFR_BRSEL
		       | (ovl->rop3 << LDBBSIFR_ROP3_SHIFT);
		break;
	}

	switch (ovl->format->fourcc) {
	case V4L2_PIX_FMT_RGB565:
	case V4L2_PIX_FMT_NV21:
	case V4L2_PIX_FMT_NV61:
	case V4L2_PIX_FMT_NV42:
		format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW;
		break;
	case V4L2_PIX_FMT_BGR24:
	case V4L2_PIX_FMT_NV12:
	case V4L2_PIX_FMT_NV16:
	case V4L2_PIX_FMT_NV24:
		format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
		break;
	case V4L2_PIX_FMT_BGR32:
	default:
		format |= LDBBSIFR_SWPL;
		break;
	}

	switch (ovl->format->fourcc) {
	case V4L2_PIX_FMT_RGB565:
		format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16;
		break;
	case V4L2_PIX_FMT_BGR24:
		format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24;
		break;
	case V4L2_PIX_FMT_BGR32:
		format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
		break;
	case V4L2_PIX_FMT_NV12:
	case V4L2_PIX_FMT_NV21:
		format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
		break;
	case V4L2_PIX_FMT_NV16:
	case V4L2_PIX_FMT_NV61:
		format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
		break;
	case V4L2_PIX_FMT_NV24:
	case V4L2_PIX_FMT_NV42:
		format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
		break;
	}

	lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));

	lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), format);

	lcdc_write_overlay(ovl, LDBnBSSZR(ovl->index),
		(ovl->yres << LDBBSSZR_BVSS_SHIFT) |
		(ovl->xres << LDBBSSZR_BHSS_SHIFT));
	lcdc_write_overlay(ovl, LDBnBLOCR(ovl->index),
		(ovl->pos_y << LDBBLOCR_CVLC_SHIFT) |
		(ovl->pos_x << LDBBLOCR_CHLC_SHIFT));
	lcdc_write_overlay(ovl, LDBnBSMWR(ovl->index),
		ovl->pitch << LDBBSMWR_BSMW_SHIFT);

	lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
	lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);

	lcdc_write(ovl->channel->lcdc, LDBCR,
		   LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
}

/*
 * __sh_mobile_lcdc_start - Configure and start the LCDC
 * @priv: LCDC device
 *
 * Configure all enabled channels and start the LCDC device. All external
 * devices (clocks, MERAM, panels, ...) are not touched by this function.
 */
static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
{
	struct sh_mobile_lcdc_chan *ch;
	unsigned long tmp;
	int k, m;

	/* Enable LCDC channels. Read data from external memory, avoid using the
	 * BEU for now.
	 */
	lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);

	/* Stop the LCDC first and disable all interrupts. */
	sh_mobile_lcdc_start_stop(priv, 0);
	lcdc_write(priv, _LDINTR, 0);

	/* Configure power supply, dot clocks and start them. */
	tmp = priv->lddckr;
	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
		ch = &priv->ch[k];
		if (!ch->enabled)
			continue;

		/* Power supply */
		lcdc_write_chan(ch, LDPMR, 0);

		m = ch->cfg->clock_divider;
		if (!m)
			continue;

		/* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
		 * denominator.
		 */
		lcdc_write_chan(ch, LDDCKPAT1R, 0);
		lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);

		if (m == 1)
			m = LDDCKR_MOSEL;
		tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
	}

	lcdc_write(priv, _LDDCKR, tmp);
	lcdc_write(priv, _LDDCKSTPR, 0);
	lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);

	/* Setup geometry, format, frame buffer memory and operation mode. */
	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
		ch = &priv->ch[k];
		if (!ch->enabled)
			continue;

		sh_mobile_lcdc_geometry(ch);

		tmp = ch->format->lddfr;

		if (ch->format->yuv) {
			switch (ch->colorspace) {
			case V4L2_COLORSPACE_REC709:
				tmp |= LDDFR_CF1;
				break;
			case V4L2_COLORSPACE_JPEG:
				tmp |= LDDFR_CF0;
				break;
			}
		}

		lcdc_write_chan(ch, LDDFR, tmp);
		lcdc_write_chan(ch, LDMLSR, ch->line_size);
		lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
		if (ch->format->yuv)
			lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);

		/* When using deferred I/O mode, configure the LCDC for one-shot
		 * operation and enable the frame end interrupt. Otherwise use
		 * continuous read mode.
		 */
		if (ch->ldmt1r_value & LDMT1R_IFM &&
		    ch->cfg->sys_bus_cfg.deferred_io_msec) {
			lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
			lcdc_write(priv, _LDINTR, LDINTR_FE);
		} else {
			lcdc_write_chan(ch, LDSM1R, 0);
		}
	}

	/* Word and long word swap. */
	switch (priv->ch[0].format->fourcc) {
	case V4L2_PIX_FMT_RGB565:
	case V4L2_PIX_FMT_NV21:
	case V4L2_PIX_FMT_NV61:
	case V4L2_PIX_FMT_NV42:
		tmp = LDDDSR_LS | LDDDSR_WS;
		break;
	case V4L2_PIX_FMT_BGR24:
	case V4L2_PIX_FMT_NV12:
	case V4L2_PIX_FMT_NV16:
	case V4L2_PIX_FMT_NV24:
		tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
		break;
	case V4L2_PIX_FMT_BGR32:
	default:
		tmp = LDDDSR_LS;
		break;
	}
	lcdc_write(priv, _LDDDSR, tmp);

	/* Enable the display output. */
	lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
	sh_mobile_lcdc_start_stop(priv, 1);
	priv->started = 1;
}

static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
{
	struct sh_mobile_meram_info *mdev = priv->meram_dev;
	struct sh_mobile_lcdc_chan *ch;
	unsigned long tmp;
	int ret;
	int k;

	/* enable clocks before accessing the hardware */
	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
		if (priv->ch[k].enabled)
			sh_mobile_lcdc_clk_on(priv);
	}

	/* reset */
	lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
	lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);

	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
		const struct sh_mobile_lcdc_panel_cfg *panel;

		ch = &priv->ch[k];
		if (!ch->enabled)
			continue;

		panel = &ch->cfg->panel_cfg;
		if (panel->setup_sys) {
			ret = panel->setup_sys(ch, &sh_mobile_lcdc_sys_bus_ops);
			if (ret)
				return ret;
		}
	}

	/* Compute frame buffer base address and pitch for each channel. */
	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
		int pixelformat;
		void *cache;

		ch = &priv->ch[k];
		if (!ch->enabled)
			continue;

		ch->base_addr_y = ch->dma_handle;
		ch->base_addr_c = ch->dma_handle
				+ ch->xres_virtual * ch->yres_virtual;
		ch->line_size = ch->pitch;

		/* Enable MERAM if possible. */
		if (mdev == NULL || ch->cfg->meram_cfg == NULL)
			continue;

		/* Free the allocated MERAM cache. */
		if (ch->cache) {
			sh_mobile_meram_cache_free(mdev, ch->cache);
			ch->cache = NULL;
		}

		switch (ch->format->fourcc) {
		case V4L2_PIX_FMT_NV12:
		case V4L2_PIX_FMT_NV21:
		case V4L2_PIX_FMT_NV16:
		case V4L2_PIX_FMT_NV61:
			pixelformat = SH_MOBILE_MERAM_PF_NV;
			break;
		case V4L2_PIX_FMT_NV24:
		case V4L2_PIX_FMT_NV42:
			pixelformat = SH_MOBILE_MERAM_PF_NV24;
			break;
		case V4L2_PIX_FMT_RGB565:
		case V4L2_PIX_FMT_BGR24:
		case V4L2_PIX_FMT_BGR32:
		default:
			pixelformat = SH_MOBILE_MERAM_PF_RGB;
			break;
		}

		cache = sh_mobile_meram_cache_alloc(mdev, ch->cfg->meram_cfg,
					ch->pitch, ch->yres, pixelformat,
					&ch->line_size);
		if (!IS_ERR(cache)) {
			sh_mobile_meram_cache_update(mdev, cache,
					ch->base_addr_y, ch->base_addr_c,
					&ch->base_addr_y, &ch->base_addr_c);
			ch->cache = cache;
		}
	}

	for (k = 0; k < ARRAY_SIZE(priv->overlays); ++k) {
		struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[k];
		sh_mobile_lcdc_overlay_setup(ovl);
	}

	/* Start the LCDC. */
	__sh_mobile_lcdc_start(priv);

	/* Setup deferred I/O, tell the board code to enable the panels, and
	 * turn backlight on.
	 */
	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
		ch = &priv->ch[k];
		if (!ch->enabled)
			continue;

		tmp = ch->cfg->sys_bus_cfg.deferred_io_msec;
		if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
			ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
			ch->defio.delay = msecs_to_jiffies(tmp);
			ch->info->fbdefio = &ch->defio;
			fb_deferred_io_init(ch->info);
		}

		sh_mobile_lcdc_display_on(ch);

		if (ch->bl) {
			ch->bl->props.power = FB_BLANK_UNBLANK;
			backlight_update_status(ch->bl);
		}
	}

	return 0;
}

static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
{
	struct sh_mobile_lcdc_chan *ch;
	int k;

	/* clean up deferred io and ask board code to disable panel */
	for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
		ch = &priv->ch[k];
		if (!ch->enabled)
			continue;

		/* deferred io mode:
		 * flush frame, and wait for frame end interrupt
		 * clean up deferred io and enable clock
		 */
		if (ch->info && ch->info->fbdefio) {
			ch->frame_end = 0;
			schedule_delayed_work(&ch->info->deferred_work, 0);
			wait_event(ch->frame_end_wait, ch->frame_end);
			fb_deferred_io_cleanup(ch->info);
			ch->info->fbdefio = NULL;
			sh_mobile_lcdc_clk_on(priv);
		}

		if (ch->bl) {
			ch->bl->props.power = FB_BLANK_POWERDOWN;
			backlight_update_status(ch->bl);
		}

		sh_mobile_lcdc_display_off(ch);

		/* Free the MERAM cache. */
		if (ch->cache) {
			sh_mobile_meram_cache_free(priv->meram_dev, ch->cache);
			ch->cache = 0;
		}

	}

	/* stop the lcdc */
	if (priv->started) {
		sh_mobile_lcdc_start_stop(priv, 0);
		priv->started = 0;
	}

	/* stop clocks */
	for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
		if (priv->ch[k].enabled)
			sh_mobile_lcdc_clk_off(priv);
}

static int __sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
				      struct fb_info *info)
{
	if (var->xres > MAX_XRES || var->yres > MAX_YRES)
		return -EINVAL;

	/* Make sure the virtual resolution is at least as big as the visible
	 * resolution.
	 */
	if (var->xres_virtual < var->xres)
		var->xres_virtual = var->xres;
	if (var->yres_virtual < var->yres)
		var->yres_virtual = var->yres;

	if (sh_mobile_format_is_fourcc(var)) {
		const struct sh_mobile_lcdc_format_info *format;

		format = sh_mobile_format_info(var->grayscale);
		if (format == NULL)
			return -EINVAL;
		var->bits_per_pixel = format->bpp;

		/* Default to RGB and JPEG color-spaces for RGB and YUV formats
		 * respectively.
		 */
		if (!format->yuv)
			var->colorspace = V4L2_COLORSPACE_SRGB;
		else if (var->colorspace != V4L2_COLORSPACE_REC709)
			var->colorspace = V4L2_COLORSPACE_JPEG;
	} else {
		if (var->bits_per_pixel <= 16) {		/* RGB 565 */
			var->bits_per_pixel = 16;
			var->red.offset = 11;
			var->red.length = 5;
			var->green.offset = 5;
			var->green.length = 6;
			var->blue.offset = 0;
			var->blue.length = 5;
			var->transp.offset = 0;
			var->transp.length = 0;
		} else if (var->bits_per_pixel <= 24) {		/* RGB 888 */
			var->bits_per_pixel = 24;
			var->red.offset = 16;
			var->red.length = 8;
			var->green.offset = 8;
			var->green.length = 8;
			var->blue.offset = 0;
			var->blue.length = 8;
			var->transp.offset = 0;
			var->transp.length = 0;
		} else if (var->bits_per_pixel <= 32) {		/* RGBA 888 */
			var->bits_per_pixel = 32;
			var->red.offset = 16;
			var->red.length = 8;
			var->green.offset = 8;
			var->green.length = 8;
			var->blue.offset = 0;
			var->blue.length = 8;
			var->transp.offset = 24;
			var->transp.length = 8;
		} else
			return -EINVAL;

		var->red.msb_right = 0;
		var->green.msb_right = 0;
		var->blue.msb_right = 0;
		var->transp.msb_right = 0;
	}

	/* Make sure we don't exceed our allocated memory. */
	if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
	    info->fix.smem_len)
		return -EINVAL;

	return 0;
}

/* -----------------------------------------------------------------------------
 * Frame buffer operations - Overlays
 */

static ssize_t
overlay_alpha_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct fb_info *info = dev_get_drvdata(dev);
	struct sh_mobile_lcdc_overlay *ovl = info->par;

	return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->alpha);
}

static ssize_t
overlay_alpha_store(struct device *dev, struct device_attribute *attr,
		    const char *buf, size_t count)
{
	struct fb_info *info = dev_get_drvdata(dev);
	struct sh_mobile_lcdc_overlay *ovl = info->par;
	unsigned int alpha;
	char *endp;

	alpha = simple_strtoul(buf, &endp, 10);
	if (isspace(*endp))
		endp++;

	if (endp - buf != count)
		return -EINVAL;

	if (alpha > 255)
		return -EINVAL;

	if (ovl->alpha != alpha) {
		ovl->alpha = alpha;

		if (ovl->mode == LCDC_OVERLAY_BLEND && ovl->enabled)
			sh_mobile_lcdc_overlay_setup(ovl);
	}

	return count;
}

static ssize_t
overlay_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct fb_info *info = dev_get_drvdata(dev);
	struct sh_mobile_lcdc_overlay *ovl = info->par;

	return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->mode);
}

static ssize_t
overlay_mode_store(struct device *dev, struct device_attribute *attr,
		   const char *buf, size_t count)
{
	struct fb_info *info = dev_get_drvdata(dev);
	struct sh_mobile_lcdc_overlay *ovl = info->par;
	unsigned int mode;
	char *endp;

	mode = simple_strtoul(buf, &endp, 10);
	if (isspace(*endp))
		endp++;

	if (endp - buf != count)
		return -EINVAL;

	if (mode != LCDC_OVERLAY_BLEND && mode != LCDC_OVERLAY_ROP3)
		return -EINVAL;

	if (ovl->mode != mode) {
		ovl->mode = mode;

		if (ovl->enabled)
			sh_mobile_lcdc_overlay_setup(ovl);
	}

	return count;
}

static ssize_t
overlay_position_show(struct device *dev, struct device_attribute *attr,
		      char *buf)
{
	struct fb_info *info = dev_get_drvdata(dev);
	struct sh_mobile_lcdc_overlay *ovl = info->par;

	return scnprintf(buf, PAGE_SIZE, "%d,%d\n", ovl->pos_x, ovl->pos_y);
}

static ssize_t
overlay_position_store(struct device *dev, struct device_attribute *attr,
		       const char *buf, size_t count)
{
	struct fb_info *info = dev_get_drvdata(dev);
	struct sh_mobile_lcdc_overlay *ovl = info->par;
	char *endp;
	int pos_x;
	int pos_y;

	pos_x = simple_strtol(buf, &endp, 10);
	if (*endp != ',')
		return -EINVAL;

	pos_y = simple_strtol(endp + 1, &endp, 10);
	if (isspace(*endp))
		endp++;

	if (endp - buf != count)
		return -EINVAL;

	if (ovl->pos_x != pos_x || ovl->pos_y != pos_y) {
		ovl->pos_x = pos_x;
		ovl->pos_y = pos_y;

		if (ovl->enabled)
			sh_mobile_lcdc_overlay_setup(ovl);
	}

	return count;
}

static ssize_t
overlay_rop3_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct fb_info *info = dev_get_drvdata(dev);
	struct sh_mobile_lcdc_overlay *ovl = info->par;

	return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->rop3);
}

static ssize_t
overlay_rop3_store(struct device *dev, struct device_attribute *attr,
		    const char *buf, size_t count)
{
	struct fb_info *info = dev_get_drvdata(dev);
	struct sh_mobile_lcdc_overlay *ovl = info->par;
	unsigned int rop3;
	char *endp;

	rop3 = !!simple_strtoul(buf, &endp, 10);
	if (isspace(*endp))
		endp++;

	if (endp - buf != count)
		return -EINVAL;

	if (rop3 > 255)
		return -EINVAL;

	if (ovl->rop3 != rop3) {
		ovl->rop3 = rop3;

		if (ovl->mode == LCDC_OVERLAY_ROP3 && ovl->enabled)
			sh_mobile_lcdc_overlay_setup(ovl);
	}

	return count;
}

static const struct device_attribute overlay_sysfs_attrs[] = {
	__ATTR(ovl_alpha, S_IRUGO|S_IWUSR,
	       overlay_alpha_show, overlay_alpha_store),
	__ATTR(ovl_mode, S_IRUGO|S_IWUSR,
	       overlay_mode_show, overlay_mode_store),
	__ATTR(ovl_position, S_IRUGO|S_IWUSR,
	       overlay_position_show, overlay_position_store),
	__ATTR(ovl_rop3, S_IRUGO|S_IWUSR,
	       overlay_rop3_show, overlay_rop3_store),
};

static const struct fb_fix_screeninfo sh_mobile_lcdc_overlay_fix  = {
	.id =		"SH Mobile LCDC",
	.type =		FB_TYPE_PACKED_PIXELS,
	.visual =	FB_VISUAL_TRUECOLOR,
	.accel =	FB_ACCEL_NONE,
	.xpanstep =	1,
	.ypanstep =	1,
	.ywrapstep =	0,
	.capabilities =	FB_CAP_FOURCC,
};

static int sh_mobile_lcdc_overlay_pan(struct fb_var_screeninfo *var,
				    struct fb_info *info)
{
	struct sh_mobile_lcdc_overlay *ovl = info->par;
	unsigned long base_addr_y;
	unsigned long base_addr_c;
	unsigned long y_offset;
	unsigned long c_offset;

	if (!ovl->format->yuv) {
		y_offset = (var->yoffset * ovl->xres_virtual + var->xoffset)
			 * ovl->format->bpp / 8;
		c_offset = 0;
	} else {
		unsigned int xsub = ovl->format->bpp < 24 ? 2 : 1;
		unsigned int ysub = ovl->format->bpp < 16 ? 2 : 1;

		y_offset = var->yoffset * ovl->xres_virtual + var->xoffset;
		c_offset = var->yoffset / ysub * ovl->xres_virtual * 2 / xsub
			 + var->xoffset * 2 / xsub;
	}

	/* If the Y offset hasn't changed, the C offset hasn't either. There's
	 * nothing to do in that case.
	 */
	if (y_offset == ovl->pan_y_offset)
		return 0;

	/* Set the source address for the next refresh */
	base_addr_y = ovl->dma_handle + y_offset;
	base_addr_c = ovl->dma_handle + ovl->xres_virtual * ovl->yres_virtual
		    + c_offset;

	ovl->base_addr_y = base_addr_y;
	ovl->base_addr_c = base_addr_c;
	ovl->pan_y_offset = y_offset;

	lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));

	lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
	lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);

	lcdc_write(ovl->channel->lcdc, LDBCR,
		   LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));

	return 0;
}

static int sh_mobile_lcdc_overlay_ioctl(struct fb_info *info, unsigned int cmd,
				      unsigned long arg)
{
	struct sh_mobile_lcdc_overlay *ovl = info->par;

	switch (cmd) {
	case FBIO_WAITFORVSYNC:
		return sh_mobile_lcdc_wait_for_vsync(ovl->channel);

	default:
		return -ENOIOCTLCMD;
	}
}

static int sh_mobile_lcdc_overlay_check_var(struct fb_var_screeninfo *var,
					  struct fb_info *info)
{
	return __sh_mobile_lcdc_check_var(var, info);
}

static int sh_mobile_lcdc_overlay_set_par(struct fb_info *info)
{
	struct sh_mobile_lcdc_overlay *ovl = info->par;

	ovl->format =
		sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));

	ovl->xres = info->var.xres;
	ovl->xres_virtual = info->var.xres_virtual;
	ovl->yres = info->var.yres;
	ovl->yres_virtual = info->var.yres_virtual;

	if (ovl->format->yuv)
		ovl->pitch = info->var.xres_virtual;
	else
		ovl->pitch = info->var.xres_virtual * ovl->format->bpp / 8;

	sh_mobile_lcdc_overlay_setup(ovl);

	info->fix.line_length = ovl->pitch;

	if (sh_mobile_format_is_fourcc(&info->var)) {
		info->fix.type = FB_TYPE_FOURCC;
		info->fix.visual = FB_VISUAL_FOURCC;
	} else {
		info->fix.type = FB_TYPE_PACKED_PIXELS;
		info->fix.visual = FB_VISUAL_TRUECOLOR;
	}

	return 0;
}

/* Overlay blanking. Disable the overlay when blanked. */
static int sh_mobile_lcdc_overlay_blank(int blank, struct fb_info *info)
{
	struct sh_mobile_lcdc_overlay *ovl = info->par;

	ovl->enabled = !blank;
	sh_mobile_lcdc_overlay_setup(ovl);

	/* Prevent the backlight from receiving a blanking event by returning
	 * a non-zero value.
	 */
	return 1;
}

static int
sh_mobile_lcdc_overlay_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
	struct sh_mobile_lcdc_overlay *ovl = info->par;

	return dma_mmap_coherent(ovl->channel->lcdc->dev, vma, ovl->fb_mem,
				 ovl->dma_handle, ovl->fb_size);
}

static struct fb_ops sh_mobile_lcdc_overlay_ops = {
	.owner          = THIS_MODULE,
	.fb_read        = fb_sys_read,
	.fb_write       = fb_sys_write,
	.fb_fillrect	= sys_fillrect,
	.fb_copyarea	= sys_copyarea,
	.fb_imageblit	= sys_imageblit,
	.fb_blank	= sh_mobile_lcdc_overlay_blank,
	.fb_pan_display = sh_mobile_lcdc_overlay_pan,
	.fb_ioctl       = sh_mobile_lcdc_overlay_ioctl,
	.fb_check_var	= sh_mobile_lcdc_overlay_check_var,
	.fb_set_par	= sh_mobile_lcdc_overlay_set_par,
	.fb_mmap	= sh_mobile_lcdc_overlay_mmap,
};

static void
sh_mobile_lcdc_overlay_fb_unregister(struct sh_mobile_lcdc_overlay *ovl)
{
	struct fb_info *info = ovl->info;

	if (info == NULL || info->dev == NULL)
		return;

	unregister_framebuffer(ovl->info);
}

static int
sh_mobile_lcdc_overlay_fb_register(struct sh_mobile_lcdc_overlay *ovl)
{
	struct sh_mobile_lcdc_priv *lcdc = ovl->channel->lcdc;
	struct fb_info *info = ovl->info;
	unsigned int i;
	int ret;

	if (info == NULL)
		return 0;

	ret = register_framebuffer(info);
	if (ret < 0)
		return ret;

	dev_info(lcdc->dev, "registered %s/overlay %u as %dx%d %dbpp.\n",
		 dev_name(lcdc->dev), ovl->index, info->var.xres,
		 info->var.yres, info->var.bits_per_pixel);

	for (i = 0; i < ARRAY_SIZE(overlay_sysfs_attrs); ++i) {
		ret = device_create_file(info->dev, &overlay_sysfs_attrs[i]);
		if (ret < 0)
			return ret;
	}

	return 0;
}

static void
sh_mobile_lcdc_overlay_fb_cleanup(struct sh_mobile_lcdc_overlay *ovl)
{
	struct fb_info *info = ovl->info;

	if (info == NULL || info->device == NULL)
		return;

	framebuffer_release(info);
}

static int
sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl)
{
	struct sh_mobile_lcdc_priv *priv = ovl->channel->lcdc;
	struct fb_var_screeninfo *var;
	struct fb_info *info;

	/* Allocate and initialize the frame buffer device. */
	info = framebuffer_alloc(0, priv->dev);
	if (info == NULL) {
		dev_err(priv->dev, "unable to allocate fb_info\n");
		return -ENOMEM;
	}

	ovl->info = info;

	info->flags = FBINFO_FLAG_DEFAULT;
	info->fbops = &sh_mobile_lcdc_overlay_ops;
	info->device = priv->dev;
	info->screen_base = ovl->fb_mem;
	info->par = ovl;

	/* Initialize fixed screen information. Restrict pan to 2 lines steps
	 * for NV12 and NV21.
	 */
	info->fix = sh_mobile_lcdc_overlay_fix;
	snprintf(info->fix.id, sizeof(info->fix.id),
		 "SH Mobile LCDC Overlay %u", ovl->index);
	info->fix.smem_start = ovl->dma_handle;
	info->fix.smem_len = ovl->fb_size;
	info->fix.line_length = ovl->pitch;

	if (ovl->format->yuv)
		info->fix.visual = FB_VISUAL_FOURCC;
	else
		info->fix.visual = FB_VISUAL_TRUECOLOR;

	switch (ovl->format->fourcc) {
	case V4L2_PIX_FMT_NV12:
	case V4L2_PIX_FMT_NV21:
		info->fix.ypanstep = 2;
	case V4L2_PIX_FMT_NV16:
	case V4L2_PIX_FMT_NV61:
		info->fix.xpanstep = 2;
	}

	/* Initialize variable screen information. */
	var = &info->var;
	memset(var, 0, sizeof(*var));
	var->xres = ovl->xres;
	var->yres = ovl->yres;
	var->xres_virtual = ovl->xres_virtual;
	var->yres_virtual = ovl->yres_virtual;
	var->activate = FB_ACTIVATE_NOW;

	/* Use the legacy API by default for RGB formats, and the FOURCC API
	 * for YUV formats.
	 */
	if (!ovl->format->yuv)
		var->bits_per_pixel = ovl->format->bpp;
	else
		var->grayscale = ovl->format->fourcc;

	return sh_mobile_lcdc_overlay_check_var(var, info);
}

/* -----------------------------------------------------------------------------
 * Frame buffer operations - main frame buffer
 */

static int sh_mobile_lcdc_setcolreg(u_int regno,
				    u_int red, u_int green, u_int blue,
				    u_int transp, struct fb_info *info)
{
	u32 *palette = info->pseudo_palette;

	if (regno >= PALETTE_NR)
		return -EINVAL;

	/* only FB_VISUAL_TRUECOLOR supported */

	red >>= 16 - info->var.red.length;
	green >>= 16 - info->var.green.length;
	blue >>= 16 - info->var.blue.length;
	transp >>= 16 - info->var.transp.length;

	palette[regno] = (red << info->var.red.offset) |
	  (green << info->var.green.offset) |
	  (blue << info->var.blue.offset) |
	  (transp << info->var.transp.offset);

	return 0;
}

static const struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
	.id =		"SH Mobile LCDC",
	.type =		FB_TYPE_PACKED_PIXELS,
	.visual =	FB_VISUAL_TRUECOLOR,
	.accel =	FB_ACCEL_NONE,
	.xpanstep =	1,
	.ypanstep =	1,
	.ywrapstep =	0,
	.capabilities =	FB_CAP_FOURCC,
};

static void sh_mobile_lcdc_fillrect(struct fb_info *info,
				    const struct fb_fillrect *rect)
{
	sys_fillrect(info, rect);
	sh_mobile_lcdc_deferred_io_touch(info);
}

static void sh_mobile_lcdc_copyarea(struct fb_info *info,
				    const struct fb_copyarea *area)
{
	sys_copyarea(info, area);
	sh_mobile_lcdc_deferred_io_touch(info);
}

static void sh_mobile_lcdc_imageblit(struct fb_info *info,
				     const struct fb_image *image)
{
	sys_imageblit(info, image);
	sh_mobile_lcdc_deferred_io_touch(info);
}

static int sh_mobile_lcdc_pan(struct fb_var_screeninfo *var,
			      struct fb_info *info)
{
	struct sh_mobile_lcdc_chan *ch = info->par;
	struct sh_mobile_lcdc_priv *priv = ch->lcdc;
	unsigned long ldrcntr;
	unsigned long base_addr_y, base_addr_c;
	unsigned long y_offset;
	unsigned long c_offset;

	if (!ch->format->yuv) {
		y_offset = (var->yoffset * ch->xres_virtual + var->xoffset)
			 * ch->format->bpp / 8;
		c_offset = 0;
	} else {
		unsigned int xsub = ch->format->bpp < 24 ? 2 : 1;
		unsigned int ysub = ch->format->bpp < 16 ? 2 : 1;

		y_offset = var->yoffset * ch->xres_virtual + var->xoffset;
		c_offset = var->yoffset / ysub * ch->xres_virtual * 2 / xsub
			 + var->xoffset * 2 / xsub;
	}

	/* If the Y offset hasn't changed, the C offset hasn't either. There's
	 * nothing to do in that case.
	 */
	if (y_offset == ch->pan_y_offset)
		return 0;

	/* Set the source address for the next refresh */
	base_addr_y = ch->dma_handle + y_offset;
	base_addr_c = ch->dma_handle + ch->xres_virtual * ch->yres_virtual
		    + c_offset;

	if (ch->cache)
		sh_mobile_meram_cache_update(priv->meram_dev, ch->cache,
					     base_addr_y, base_addr_c,
					     &base_addr_y, &base_addr_c);

	ch->base_addr_y = base_addr_y;
	ch->base_addr_c = base_addr_c;
	ch->pan_y_offset = y_offset;

	lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
	if (ch->format->yuv)
		lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);

	ldrcntr = lcdc_read(priv, _LDRCNTR);
	if (lcdc_chan_is_sublcd(ch))
		lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
	else
		lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);


	sh_mobile_lcdc_deferred_io_touch(info);

	return 0;
}

static int sh_mobile_lcdc_ioctl(struct fb_info *info, unsigned int cmd,
				unsigned long arg)
{
	struct sh_mobile_lcdc_chan *ch = info->par;
	int retval;

	switch (cmd) {
	case FBIO_WAITFORVSYNC:
		retval = sh_mobile_lcdc_wait_for_vsync(ch);
		break;

	default:
		retval = -ENOIOCTLCMD;
		break;
	}
	return retval;
}

static void sh_mobile_fb_reconfig(struct fb_info *info)
{
	struct sh_mobile_lcdc_chan *ch = info->par;
	struct fb_var_screeninfo var;
	struct fb_videomode mode;
	struct fb_event event;
	int evnt = FB_EVENT_MODE_CHANGE_ALL;

	if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
		/* More framebuffer users are active */
		return;

	fb_var_to_videomode(&mode, &info->var);

	if (fb_mode_is_equal(&ch->display.mode, &mode))
		return;

	/* Display has been re-plugged, framebuffer is free now, reconfigure */
	var = info->var;
	fb_videomode_to_var(&var, &ch->display.mode);
	var.width = ch->display.width;
	var.height = ch->display.height;
	var.activate = FB_ACTIVATE_NOW;

	if (fb_set_var(info, &var) < 0)
		/* Couldn't reconfigure, hopefully, can continue as before */
		return;

	/*
	 * fb_set_var() calls the notifier change internally, only if
	 * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
	 * user event, we have to call the chain ourselves.
	 */
	event.info = info;
	event.data = &ch->display.mode;
	fb_notifier_call_chain(evnt, &event);
}

/*
 * Locking: both .fb_release() and .fb_open() are called with info->lock held if
 * user == 1, or with console sem held, if user == 0.
 */
static int sh_mobile_lcdc_release(struct fb_info *info, int user)
{
	struct sh_mobile_lcdc_chan *ch = info->par;

	mutex_lock(&ch->open_lock);
	dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);

	ch->use_count--;

	/* Nothing to reconfigure, when called from fbcon */
	if (user) {
		console_lock();
		sh_mobile_fb_reconfig(info);
		console_unlock();
	}

	mutex_unlock(&ch->open_lock);

	return 0;
}

static int sh_mobile_lcdc_open(struct fb_info *info, int user)
{
	struct sh_mobile_lcdc_chan *ch = info->par;

	mutex_lock(&ch->open_lock);
	ch->use_count++;

	dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
	mutex_unlock(&ch->open_lock);

	return 0;
}

static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
				    struct fb_info *info)
{
	struct sh_mobile_lcdc_chan *ch = info->par;
	struct sh_mobile_lcdc_priv *p = ch->lcdc;
	unsigned int best_dist = (unsigned int)-1;
	unsigned int best_xres = 0;
	unsigned int best_yres = 0;
	unsigned int i;
	int ret;

	/* If board code provides us with a list of available modes, make sure
	 * we use one of them. Find the mode closest to the requested one. The
	 * distance between two modes is defined as the size of the
	 * non-overlapping parts of the two rectangles.
	 */
	for (i = 0; i < ch->cfg->num_modes; ++i) {
		const struct fb_videomode *mode = &ch->cfg->lcd_modes[i];
		unsigned int dist;

		/* We can only round up. */
		if (var->xres > mode->xres || var->yres > mode->yres)
			continue;

		dist = var->xres * var->yres + mode->xres * mode->yres
		     - 2 * min(var->xres, mode->xres)
			 * min(var->yres, mode->yres);

		if (dist < best_dist) {
			best_xres = mode->xres;
			best_yres = mode->yres;
			best_dist = dist;
		}
	}

	/* If no available mode can be used, return an error. */
	if (ch->cfg->num_modes != 0) {
		if (best_dist == (unsigned int)-1)
			return -EINVAL;

		var->xres = best_xres;
		var->yres = best_yres;
	}

	ret = __sh_mobile_lcdc_check_var(var, info);
	if (ret < 0)
		return ret;

	/* only accept the forced_fourcc for dual channel configurations */
	if (p->forced_fourcc &&
	    p->forced_fourcc != sh_mobile_format_fourcc(var))
		return -EINVAL;

	return 0;
}

static int sh_mobile_lcdc_set_par(struct fb_info *info)
{
	struct sh_mobile_lcdc_chan *ch = info->par;
	int ret;

	sh_mobile_lcdc_stop(ch->lcdc);

	ch->format = sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
	ch->colorspace = info->var.colorspace;

	ch->xres = info->var.xres;
	ch->xres_virtual = info->var.xres_virtual;
	ch->yres = info->var.yres;
	ch->yres_virtual = info->var.yres_virtual;

	if (ch->format->yuv)
		ch->pitch = info->var.xres_virtual;
	else
		ch->pitch = info->var.xres_virtual * ch->format->bpp / 8;

	ret = sh_mobile_lcdc_start(ch->lcdc);
	if (ret < 0)
		dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);

	info->fix.line_length = ch->pitch;

	if (sh_mobile_format_is_fourcc(&info->var)) {
		info->fix.type = FB_TYPE_FOURCC;
		info->fix.visual = FB_VISUAL_FOURCC;
	} else {
		info->fix.type = FB_TYPE_PACKED_PIXELS;
		info->fix.visual = FB_VISUAL_TRUECOLOR;
	}

	return ret;
}

/*
 * Screen blanking. Behavior is as follows:
 * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
 * FB_BLANK_NORMAL: screen blanked, clocks enabled
 * FB_BLANK_VSYNC,
 * FB_BLANK_HSYNC,
 * FB_BLANK_POWEROFF: screen blanked, clocks disabled
 */
static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
{
	struct sh_mobile_lcdc_chan *ch = info->par;
	struct sh_mobile_lcdc_priv *p = ch->lcdc;

	/* blank the screen? */
	if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
		struct fb_fillrect rect = {
			.width = ch->xres,
			.height = ch->yres,
		};
		sh_mobile_lcdc_fillrect(info, &rect);
	}
	/* turn clocks on? */
	if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
		sh_mobile_lcdc_clk_on(p);
	}
	/* turn clocks off? */
	if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
		/* make sure the screen is updated with the black fill before
		 * switching the clocks off. one vsync is not enough since
		 * blanking may occur in the middle of a refresh. deferred io
		 * mode will reenable the clocks and update the screen in time,
		 * so it does not need this. */
		if (!info->fbdefio) {
			sh_mobile_lcdc_wait_for_vsync(ch);
			sh_mobile_lcdc_wait_for_vsync(ch);
		}
		sh_mobile_lcdc_clk_off(p);
	}

	ch->blank_status = blank;
	return 0;
}

static int
sh_mobile_lcdc_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
	struct sh_mobile_lcdc_chan *ch = info->par;

	return dma_mmap_coherent(ch->lcdc->dev, vma, ch->fb_mem,
				 ch->dma_handle, ch->fb_size);
}

static struct fb_ops sh_mobile_lcdc_ops = {
	.owner          = THIS_MODULE,
	.fb_setcolreg	= sh_mobile_lcdc_setcolreg,
	.fb_read        = fb_sys_read,
	.fb_write       = fb_sys_write,
	.fb_fillrect	= sh_mobile_lcdc_fillrect,
	.fb_copyarea	= sh_mobile_lcdc_copyarea,
	.fb_imageblit	= sh_mobile_lcdc_imageblit,
	.fb_blank	= sh_mobile_lcdc_blank,
	.fb_pan_display = sh_mobile_lcdc_pan,
	.fb_ioctl       = sh_mobile_lcdc_ioctl,
	.fb_open	= sh_mobile_lcdc_open,
	.fb_release	= sh_mobile_lcdc_release,
	.fb_check_var	= sh_mobile_lcdc_check_var,
	.fb_set_par	= sh_mobile_lcdc_set_par,
	.fb_mmap	= sh_mobile_lcdc_mmap,
};

static void
sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch)
{
	if (ch->info && ch->info->dev)
		unregister_framebuffer(ch->info);
}

static int
sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch)
{
	struct fb_info *info = ch->info;
	int ret;

	if (info->fbdefio) {
		ch->sglist = vmalloc(sizeof(struct scatterlist) *
				     ch->fb_size >> PAGE_SHIFT);
		if (!ch->sglist) {
			dev_err(ch->lcdc->dev, "cannot allocate sglist\n");
			return -ENOMEM;
		}
	}

	info->bl_dev = ch->bl;

	ret = register_framebuffer(info);
	if (ret < 0)
		return ret;

	dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n",
		 dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ?
		 "mainlcd" : "sublcd", info->var.xres, info->var.yres,
		 info->var.bits_per_pixel);

	/* deferred io mode: disable clock to save power */
	if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
		sh_mobile_lcdc_clk_off(ch->lcdc);

	return ret;
}

static void
sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch)
{
	struct fb_info *info = ch->info;

	if (!info || !info->device)
		return;

	if (ch->sglist)
		vfree(ch->sglist);

	fb_dealloc_cmap(&info->cmap);
	framebuffer_release(info);
}

static int
sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
			       const struct fb_videomode *modes,
			       unsigned int num_modes)
{
	struct sh_mobile_lcdc_priv *priv = ch->lcdc;
	struct fb_var_screeninfo *var;
	struct fb_info *info;
	int ret;

	/* Allocate and initialize the frame buffer device. Create the modes
	 * list and allocate the color map.
	 */
	info = framebuffer_alloc(0, priv->dev);
	if (info == NULL) {
		dev_err(priv->dev, "unable to allocate fb_info\n");
		return -ENOMEM;
	}

	ch->info = info;

	info->flags = FBINFO_FLAG_DEFAULT;
	info->fbops = &sh_mobile_lcdc_ops;
	info->device = priv->dev;
	info->screen_base = ch->fb_mem;
	info->pseudo_palette = &ch->pseudo_palette;
	info->par = ch;

	fb_videomode_to_modelist(modes, num_modes, &info->modelist);

	ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
	if (ret < 0) {
		dev_err(priv->dev, "unable to allocate cmap\n");
		return ret;
	}

	/* Initialize fixed screen information. Restrict pan to 2 lines steps
	 * for NV12 and NV21.
	 */
	info->fix = sh_mobile_lcdc_fix;
	info->fix.smem_start = ch->dma_handle;
	info->fix.smem_len = ch->fb_size;
	info->fix.line_length = ch->pitch;

	if (ch->format->yuv)
		info->fix.visual = FB_VISUAL_FOURCC;
	else
		info->fix.visual = FB_VISUAL_TRUECOLOR;

	switch (ch->format->fourcc) {
	case V4L2_PIX_FMT_NV12:
	case V4L2_PIX_FMT_NV21:
		info->fix.ypanstep = 2;
	case V4L2_PIX_FMT_NV16:
	case V4L2_PIX_FMT_NV61:
		info->fix.xpanstep = 2;
	}

	/* Initialize variable screen information using the first mode as
	 * default.
	 */
	var = &info->var;
	fb_videomode_to_var(var, modes);
	var->width = ch->display.width;
	var->height = ch->display.height;
	var->xres_virtual = ch->xres_virtual;
	var->yres_virtual = ch->yres_virtual;
	var->activate = FB_ACTIVATE_NOW;

	/* Use the legacy API by default for RGB formats, and the FOURCC API
	 * for YUV formats.
	 */
	if (!ch->format->yuv)
		var->bits_per_pixel = ch->format->bpp;
	else
		var->grayscale = ch->format->fourcc;

	ret = sh_mobile_lcdc_check_var(var, info);
	if (ret)
		return ret;

	return 0;
}

/* -----------------------------------------------------------------------------
 * Backlight
 */

static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
{
	struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
	int brightness = bdev->props.brightness;

	if (bdev->props.power != FB_BLANK_UNBLANK ||
	    bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
		brightness = 0;

	ch->bl_brightness = brightness;
	return ch->cfg->bl_info.set_brightness(brightness);
}

static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
{
	struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);

	return ch->bl_brightness;
}

static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
				   struct fb_info *info)
{
	return (info->bl_dev == bdev);
}

static struct backlight_ops sh_mobile_lcdc_bl_ops = {
	.options	= BL_CORE_SUSPENDRESUME,
	.update_status	= sh_mobile_lcdc_update_bl,
	.get_brightness	= sh_mobile_lcdc_get_brightness,
	.check_fb	= sh_mobile_lcdc_check_fb,
};

static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
					       struct sh_mobile_lcdc_chan *ch)
{
	struct backlight_device *bl;

	bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch,
				       &sh_mobile_lcdc_bl_ops, NULL);
	if (IS_ERR(bl)) {
		dev_err(parent, "unable to register backlight device: %ld\n",
			PTR_ERR(bl));
		return NULL;
	}

	bl->props.max_brightness = ch->cfg->bl_info.max_brightness;
	bl->props.brightness = bl->props.max_brightness;
	backlight_update_status(bl);

	return bl;
}

static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
{
	backlight_device_unregister(bdev);
}

/* -----------------------------------------------------------------------------
 * Power management
 */

static int sh_mobile_lcdc_suspend(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);

	sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
	return 0;
}

static int sh_mobile_lcdc_resume(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);

	return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
}

static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);

	/* turn off LCDC hardware */
	lcdc_write(priv, _LDCNT1R, 0);

	return 0;
}

static int sh_mobile_lcdc_runtime_resume(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);

	__sh_mobile_lcdc_start(priv);

	return 0;
}

static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
	.suspend = sh_mobile_lcdc_suspend,
	.resume = sh_mobile_lcdc_resume,
	.runtime_suspend = sh_mobile_lcdc_runtime_suspend,
	.runtime_resume = sh_mobile_lcdc_runtime_resume,
};

/* -----------------------------------------------------------------------------
 * Framebuffer notifier
 */

/* locking: called with info->lock held */
static int sh_mobile_lcdc_notify(struct notifier_block *nb,
				 unsigned long action, void *data)
{
	struct fb_event *event = data;
	struct fb_info *info = event->info;
	struct sh_mobile_lcdc_chan *ch = info->par;

	if (&ch->lcdc->notifier != nb)
		return NOTIFY_DONE;

	dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
		__func__, action, event->data);

	switch(action) {
	case FB_EVENT_SUSPEND:
		sh_mobile_lcdc_display_off(ch);
		sh_mobile_lcdc_stop(ch->lcdc);
		break;
	case FB_EVENT_RESUME:
		mutex_lock(&ch->open_lock);
		sh_mobile_fb_reconfig(info);
		mutex_unlock(&ch->open_lock);

		sh_mobile_lcdc_display_on(ch);
		sh_mobile_lcdc_start(ch->lcdc);
	}

	return NOTIFY_OK;
}

/* -----------------------------------------------------------------------------
 * Probe/remove and driver init/exit
 */

static const struct fb_videomode default_720p = {
	.name = "HDMI 720p",
	.xres = 1280,
	.yres = 720,

	.left_margin = 220,
	.right_margin = 110,
	.hsync_len = 40,

	.upper_margin = 20,
	.lower_margin = 5,
	.vsync_len = 5,

	.pixclock = 13468,
	.refresh = 60,
	.sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
};

static int sh_mobile_lcdc_remove(struct platform_device *pdev)
{
	struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
	unsigned int i;

	fb_unregister_client(&priv->notifier);

	for (i = 0; i < ARRAY_SIZE(priv->overlays); i++)
		sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]);
	for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
		sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]);

	sh_mobile_lcdc_stop(priv);

	for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) {
		struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];

		sh_mobile_lcdc_overlay_fb_cleanup(ovl);

		if (ovl->fb_mem)
			dma_free_coherent(&pdev->dev, ovl->fb_size,
					  ovl->fb_mem, ovl->dma_handle);
	}

	for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
		struct sh_mobile_lcdc_chan *ch = &priv->ch[i];

		if (ch->tx_dev) {
			ch->tx_dev->lcdc = NULL;
			module_put(ch->cfg->tx_dev->dev.driver->owner);
		}

		sh_mobile_lcdc_channel_fb_cleanup(ch);

		if (ch->fb_mem)
			dma_free_coherent(&pdev->dev, ch->fb_size,
					  ch->fb_mem, ch->dma_handle);
	}

	for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
		struct sh_mobile_lcdc_chan *ch = &priv->ch[i];

		if (ch->bl)
			sh_mobile_lcdc_bl_remove(ch->bl);
		mutex_destroy(&ch->open_lock);
	}

	if (priv->dot_clk) {
		pm_runtime_disable(&pdev->dev);
		clk_put(priv->dot_clk);
	}

	if (priv->base)
		iounmap(priv->base);

	if (priv->irq)
		free_irq(priv->irq, priv);
	kfree(priv);
	return 0;
}

static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
{
	int interface_type = ch->cfg->interface_type;

	switch (interface_type) {
	case RGB8:
	case RGB9:
	case RGB12A:
	case RGB12B:
	case RGB16:
	case RGB18:
	case RGB24:
	case SYS8A:
	case SYS8B:
	case SYS8C:
	case SYS8D:
	case SYS9:
	case SYS12:
	case SYS16A:
	case SYS16B:
	case SYS16C:
	case SYS18:
	case SYS24:
		break;
	default:
		return -EINVAL;
	}

	/* SUBLCD only supports SYS interface */
	if (lcdc_chan_is_sublcd(ch)) {
		if (!(interface_type & LDMT1R_IFM))
			return -EINVAL;

		interface_type &= ~LDMT1R_IFM;
	}

	ch->ldmt1r_value = interface_type;
	return 0;
}

static int
sh_mobile_lcdc_overlay_init(struct sh_mobile_lcdc_overlay *ovl)
{
	const struct sh_mobile_lcdc_format_info *format;
	struct device *dev = ovl->channel->lcdc->dev;
	int ret;

	if (ovl->cfg->fourcc == 0)
		return 0;

	/* Validate the format. */
	format = sh_mobile_format_info(ovl->cfg->fourcc);
	if (format == NULL) {
		dev_err(dev, "Invalid FOURCC %08x\n", ovl->cfg->fourcc);
		return -EINVAL;
	}

	ovl->enabled = false;
	ovl->mode = LCDC_OVERLAY_BLEND;
	ovl->alpha = 255;
	ovl->rop3 = 0;
	ovl->pos_x = 0;
	ovl->pos_y = 0;

	/* The default Y virtual resolution is twice the panel size to allow for
	 * double-buffering.
	 */
	ovl->format = format;
	ovl->xres = ovl->cfg->max_xres;
	ovl->xres_virtual = ovl->xres;
	ovl->yres = ovl->cfg->max_yres;
	ovl->yres_virtual = ovl->yres * 2;

	if (!format->yuv)
		ovl->pitch = ovl->xres_virtual * format->bpp / 8;
	else
		ovl->pitch = ovl->xres_virtual;

	/* Allocate frame buffer memory. */
	ovl->fb_size = ovl->cfg->max_xres * ovl->cfg->max_yres
		       * format->bpp / 8 * 2;
	ovl->fb_mem = dma_alloc_coherent(dev, ovl->fb_size, &ovl->dma_handle,
					 GFP_KERNEL);
	if (!ovl->fb_mem) {
		dev_err(dev, "unable to allocate buffer\n");
		return -ENOMEM;
	}

	ret = sh_mobile_lcdc_overlay_fb_init(ovl);
	if (ret < 0)
		return ret;

	return 0;
}

static int
sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch)
{
	const struct sh_mobile_lcdc_format_info *format;
	const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg;
	struct device *dev = ch->lcdc->dev;
	const struct fb_videomode *max_mode;
	const struct fb_videomode *mode;
	unsigned int num_modes;
	unsigned int max_size;
	unsigned int i;

	mutex_init(&ch->open_lock);
	ch->notify = sh_mobile_lcdc_display_notify;

	/* Validate the format. */
	format = sh_mobile_format_info(cfg->fourcc);
	if (format == NULL) {
		dev_err(dev, "Invalid FOURCC %08x.\n", cfg->fourcc);
		return -EINVAL;
	}

	/* Iterate through the modes to validate them and find the highest
	 * resolution.
	 */
	max_mode = NULL;
	max_size = 0;

	for (i = 0, mode = cfg->lcd_modes; i < cfg->num_modes; i++, mode++) {
		unsigned int size = mode->yres * mode->xres;

		/* NV12/NV21 buffers must have even number of lines */
		if ((cfg->fourcc == V4L2_PIX_FMT_NV12 ||
		     cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) {
			dev_err(dev, "yres must be multiple of 2 for "
				"YCbCr420 mode.\n");
			return -EINVAL;
		}

		if (size > max_size) {
			max_mode = mode;
			max_size = size;
		}
	}

	if (!max_size)
		max_size = MAX_XRES * MAX_YRES;
	else
		dev_dbg(dev, "Found largest videomode %ux%u\n",
			max_mode->xres, max_mode->yres);

	if (cfg->lcd_modes == NULL) {
		mode = &default_720p;
		num_modes = 1;
	} else {
		mode = cfg->lcd_modes;
		num_modes = cfg->num_modes;
	}

	/* Use the first mode as default. The default Y virtual resolution is
	 * twice the panel size to allow for double-buffering.
	 */
	ch->format = format;
	ch->xres = mode->xres;
	ch->xres_virtual = mode->xres;
	ch->yres = mode->yres;
	ch->yres_virtual = mode->yres * 2;

	if (!format->yuv) {
		ch->colorspace = V4L2_COLORSPACE_SRGB;
		ch->pitch = ch->xres_virtual * format->bpp / 8;
	} else {
		ch->colorspace = V4L2_COLORSPACE_REC709;
		ch->pitch = ch->xres_virtual;
	}

	ch->display.width = cfg->panel_cfg.width;
	ch->display.height = cfg->panel_cfg.height;
	ch->display.mode = *mode;

	/* Allocate frame buffer memory. */
	ch->fb_size = max_size * format->bpp / 8 * 2;
	ch->fb_mem = dma_alloc_coherent(dev, ch->fb_size, &ch->dma_handle,
					GFP_KERNEL);
	if (ch->fb_mem == NULL) {
		dev_err(dev, "unable to allocate buffer\n");
		return -ENOMEM;
	}

	/* Initialize the transmitter device if present. */
	if (cfg->tx_dev) {
		if (!cfg->tx_dev->dev.driver ||
		    !try_module_get(cfg->tx_dev->dev.driver->owner)) {
			dev_warn(dev, "unable to get transmitter device\n");
			return -EINVAL;
		}
		ch->tx_dev = platform_get_drvdata(cfg->tx_dev);
		ch->tx_dev->lcdc = ch;
		ch->tx_dev->def_mode = *mode;
	}

	return sh_mobile_lcdc_channel_fb_init(ch, mode, num_modes);
}

static int sh_mobile_lcdc_probe(struct platform_device *pdev)
{
	struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
	struct sh_mobile_lcdc_priv *priv;
	struct resource *res;
	int num_channels;
	int error;
	int i;

	if (!pdata) {
		dev_err(&pdev->dev, "no platform data defined\n");
		return -EINVAL;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	i = platform_get_irq(pdev, 0);
	if (!res || i < 0) {
		dev_err(&pdev->dev, "cannot get platform resources\n");
		return -ENOENT;
	}

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		dev_err(&pdev->dev, "cannot allocate device data\n");
		return -ENOMEM;
	}

	priv->dev = &pdev->dev;
	priv->meram_dev = pdata->meram_dev;
	platform_set_drvdata(pdev, priv);

	error = request_irq(i, sh_mobile_lcdc_irq, 0,
			    dev_name(&pdev->dev), priv);
	if (error) {
		dev_err(&pdev->dev, "unable to request irq\n");
		goto err1;
	}

	priv->irq = i;
	atomic_set(&priv->hw_usecnt, -1);

	for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
		struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;

		ch->lcdc = priv;
		ch->cfg = &pdata->ch[i];

		error = sh_mobile_lcdc_check_interface(ch);
		if (error) {
			dev_err(&pdev->dev, "unsupported interface type\n");
			goto err1;
		}
		init_waitqueue_head(&ch->frame_end_wait);
		init_completion(&ch->vsync_completion);

		/* probe the backlight is there is one defined */
		if (ch->cfg->bl_info.max_brightness)
			ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);

		switch (pdata->ch[i].chan) {
		case LCDC_CHAN_MAINLCD:
			ch->enabled = LDCNT2R_ME;
			ch->reg_offs = lcdc_offs_mainlcd;
			num_channels++;
			break;
		case LCDC_CHAN_SUBLCD:
			ch->enabled = LDCNT2R_SE;
			ch->reg_offs = lcdc_offs_sublcd;
			num_channels++;
			break;
		}
	}

	if (!num_channels) {
		dev_err(&pdev->dev, "no channels defined\n");
		error = -EINVAL;
		goto err1;
	}

	/* for dual channel LCDC (MAIN + SUB) force shared format setting */
	if (num_channels == 2)
		priv->forced_fourcc = pdata->ch[0].fourcc;

	priv->base = ioremap_nocache(res->start, resource_size(res));
	if (!priv->base)
		goto err1;

	error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source);
	if (error) {
		dev_err(&pdev->dev, "unable to setup clocks\n");
		goto err1;
	}

	/* Enable runtime PM. */
	pm_runtime_enable(&pdev->dev);

	for (i = 0; i < num_channels; i++) {
		struct sh_mobile_lcdc_chan *ch = &priv->ch[i];

		error = sh_mobile_lcdc_channel_init(ch);
		if (error)
			goto err1;
	}

	for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
		struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];

		ovl->cfg = &pdata->overlays[i];
		ovl->channel = &priv->ch[0];

		error = sh_mobile_lcdc_overlay_init(ovl);
		if (error)
			goto err1;
	}

	error = sh_mobile_lcdc_start(priv);
	if (error) {
		dev_err(&pdev->dev, "unable to start hardware\n");
		goto err1;
	}

	for (i = 0; i < num_channels; i++) {
		struct sh_mobile_lcdc_chan *ch = priv->ch + i;

		error = sh_mobile_lcdc_channel_fb_register(ch);
		if (error)
			goto err1;
	}

	for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
		struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];

		error = sh_mobile_lcdc_overlay_fb_register(ovl);
		if (error)
			goto err1;
	}

	/* Failure ignored */
	priv->notifier.notifier_call = sh_mobile_lcdc_notify;
	fb_register_client(&priv->notifier);

	return 0;
err1:
	sh_mobile_lcdc_remove(pdev);

	return error;
}

static struct platform_driver sh_mobile_lcdc_driver = {
	.driver		= {
		.name		= "sh_mobile_lcdc_fb",
		.owner		= THIS_MODULE,
		.pm		= &sh_mobile_lcdc_dev_pm_ops,
	},
	.probe		= sh_mobile_lcdc_probe,
	.remove		= sh_mobile_lcdc_remove,
};

module_platform_driver(sh_mobile_lcdc_driver);

MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
MODULE_LICENSE("GPL v2");