aboutsummaryrefslogtreecommitdiffhomepage
path: root/vidix/mga_vid.c
blob: bab02d7df84407fa99acf8fe50d4c3ef56430fa3 (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
/*
 * VIDIX driver for Matrox chipsets.
 *
 * Copyright (C) 2002 Alex Beregszaszi
 * Original sources from Aaron Holtzman (C) 1999.
 * module skeleton based on gutted agpgart module by Jeff Hartmann
 *   <slicer@ionet.net>
 * YUY2 support and double buffering added by A'rpi/ESP-team
 * brightness/contrast support by Nick Kurshev/Dariush Pietrzak (eyck)
 *
 * This file is part of MPlayer.
 *
 * MPlayer is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * MPlayer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

/* TODO:
 *   - fix memory size detection (current reading pci userconfig isn't
 *     working as requested - returns the max avail. ram on arch?)
 *   - translate all non-english comments to english
 */

//#define CRTC2

// Set this value, if autodetection fails! (video ram size in megabytes)
//#define MGA_MEMORY_SIZE 16

/* No irq support in userspace implemented yet, do not enable this! */
/* disable irq */
#define MGA_ALLOW_IRQ 0

#define MGA_VSYNC_POS 2

#undef MGA_PCICONFIG_MEMDETECT

#define MGA_DEFAULT_FRAMES 4

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <inttypes.h>

#include "vidix.h"
#include "fourcc.h"
#include "dha.h"
#include "pci_ids.h"
#include "pci_names.h"

#ifdef __MINGW32__
#define ENOTSUP 134
#endif

#if    !defined(ENOTSUP) && defined(EOPNOTSUPP)
#define ENOTSUP EOPNOTSUPP
#endif

/* from radeon_vid */
#define GETREG(TYPE,PTR,OFFZ)		(*((volatile TYPE*)((PTR)+(OFFZ))))
#define SETREG(TYPE,PTR,OFFZ,VAL)	(*((volatile TYPE*)((PTR)+(OFFZ))))=VAL

#define readb(addr)		GETREG(uint8_t,(uint32_t)(addr),0)
#define writeb(val,addr)	SETREG(uint8_t,(uint32_t)(addr),0,val)
#define readl(addr)		GETREG(uint32_t,(uint32_t)(addr),0)
#define writel(val,addr)	SETREG(uint32_t,(uint32_t)(addr),0,val)

static int mga_verbose = 0;

/* for device detection */
static int probed = 0;
static pciinfo_t pci_info;

/* internal booleans */
static int mga_vid_in_use = 0;
static int is_g400 = 0;
static int vid_src_ready = 0;
static int vid_overlay_on = 0;

/* mapped physical addresses */
static uint8_t *mga_mmio_base = 0;
static uint8_t *mga_mem_base = 0;

static int mga_src_base = 0; /* YUV buffer position in video memory */

static uint32_t mga_ram_size = 0; /* how much megabytes videoram we have */

/* Graphic keys */
static vidix_grkey_t mga_grkey;

static int colkey_saved = 0;
static int colkey_on = 0;
static unsigned char colkey_color[4];
static unsigned char colkey_mask[4];

/* for IRQ */
static int mga_irq = -1;

static int mga_next_frame = 0;

static vidix_capability_t mga_cap =
{
    "Matrox MGA G200/G4x0/G5x0 YUV Video",
    "Aaron Holtzman, Arpad Gereoffy, Alex Beregszaszi, Nick Kurshev",
    TYPE_OUTPUT,
    { 0, 0, 0, 0 },
    2048,
    2048,
    4,
    4,
    -1,
    FLAG_UPSCALER | FLAG_DOWNSCALER | FLAG_EQUALIZER,
    VENDOR_MATROX,
    -1, /* will be set in vixProbe */
    { 0, 0, 0, 0}
};

/* MATROX BES registers */
typedef struct bes_registers_s
{
	//BES Control
	uint32_t besctl;
	//BES Global control
	uint32_t besglobctl;
	//Luma control (brightness and contrast)
	uint32_t beslumactl;
	//Line pitch
	uint32_t bespitch;

	//Buffer A-1 Chroma 3 plane org
	uint32_t besa1c3org;
	//Buffer A-1 Chroma org
	uint32_t besa1corg;
	//Buffer A-1 Luma org
	uint32_t besa1org;

	//Buffer A-2 Chroma 3 plane org
	uint32_t besa2c3org;
	//Buffer A-2 Chroma org
	uint32_t besa2corg;
	//Buffer A-2 Luma org
	uint32_t besa2org;

	//Buffer B-1 Chroma 3 plane org
	uint32_t besb1c3org;
	//Buffer B-1 Chroma org
	uint32_t besb1corg;
	//Buffer B-1 Luma org
	uint32_t besb1org;

	//Buffer B-2 Chroma 3 plane org
	uint32_t besb2c3org;
	//Buffer B-2 Chroma org
	uint32_t besb2corg;
	//Buffer B-2 Luma org
	uint32_t besb2org;

	//BES Horizontal coord
	uint32_t beshcoord;
	//BES Horizontal inverse scaling [5.14]
	uint32_t beshiscal;
	//BES Horizontal source start [10.14] (for scaling)
	uint32_t beshsrcst;
	//BES Horizontal source ending [10.14] (for scaling)
	uint32_t beshsrcend;
	//BES Horizontal source last
	uint32_t beshsrclst;


	//BES Vertical coord
	uint32_t besvcoord;
	//BES Vertical inverse scaling [5.14]
	uint32_t besviscal;
	//BES Field 1 vertical source last position
	uint32_t besv1srclst;
	//BES Field 1 weight start
	uint32_t besv1wght;
	//BES Field 2 vertical source last position
	uint32_t besv2srclst;
	//BES Field 2 weight start
	uint32_t besv2wght;

} bes_registers_t;
static bes_registers_t regs;

#ifdef CRTC2
typedef struct crtc2_registers_s
{
	uint32_t c2ctl;
	uint32_t c2datactl;
	uint32_t c2misc;
	uint32_t c2hparam;
	uint32_t c2hsync;
	uint32_t c2offset;
	uint32_t c2pl2startadd0;
	uint32_t c2pl2startadd1;
	uint32_t c2pl3startadd0;
	uint32_t c2pl3startadd1;
	uint32_t c2preload;
	uint32_t c2spicstartadd0;
	uint32_t c2spicstartadd1;
	uint32_t c2startadd0;
	uint32_t c2startadd1;
	uint32_t c2subpiclut;
	uint32_t c2vcount;
	uint32_t c2vparam;
	uint32_t c2vsync;
} crtc2_registers_t;
static crtc2_registers_t cregs;
#endif

//All register offsets are converted to word aligned offsets (32 bit)
//because we want all our register accesses to be 32 bits
#define VCOUNT      0x1e20

#define PALWTADD      0x3c00 // Index register for X_DATAREG port
#define X_DATAREG     0x3c0a

#define XMULCTRL      0x19
#define BPP_8         0x00
#define BPP_15        0x01
#define BPP_16        0x02
#define BPP_24        0x03
#define BPP_32_DIR    0x04
#define BPP_32_PAL    0x07

#define XCOLMSK       0x40
#define X_COLKEY      0x42
#define XKEYOPMODE    0x51
#define XCOLMSK0RED   0x52
#define XCOLMSK0GREEN 0x53
#define XCOLMSK0BLUE  0x54
#define XCOLKEY0RED   0x55
#define XCOLKEY0GREEN 0x56
#define XCOLKEY0BLUE  0x57

#ifdef CRTC2
/*CRTC2 registers*/
#define XMISCCTRL  0x1e
#define C2CTL       0x3c10
#define C2DATACTL   0x3c4c
#define C2MISC      0x3c44
#define C2HPARAM    0x3c14
#define C2HSYNC     0x3c18
#define C2OFFSET    0x3c40
#define C2PL2STARTADD0 0x3c30  // like BESA1CORG
#define C2PL2STARTADD1 0x3c34  // like BESA2CORG
#define C2PL3STARTADD0 0x3c38  // like BESA1C3ORG
#define C2PL3STARTADD1 0x3c3c  // like BESA2C3ORG
#define C2PRELOAD   0x3c24
#define C2SPICSTARTADD0 0x3c54
#define C2SPICSTARTADD1 0x3c58
#define C2STARTADD0 0x3c28  // like BESA1ORG
#define C2STARTADD1 0x3c2c  // like BESA2ORG
#define C2SUBPICLUT 0x3c50
#define C2VCOUNT    0x3c48
#define C2VPARAM    0x3c1c
#define C2VSYNC     0x3c20
#endif /* CRTC2 */

// Backend Scaler registers
#define BESCTL      0x3d20
#define BESGLOBCTL  0x3dc0
#define BESLUMACTL  0x3d40
#define BESPITCH    0x3d24

#define BESA1C3ORG  0x3d60
#define BESA1CORG   0x3d10
#define BESA1ORG    0x3d00

#define BESA2C3ORG  0x3d64
#define BESA2CORG   0x3d14
#define BESA2ORG    0x3d04

#define BESB1C3ORG  0x3d68
#define BESB1CORG   0x3d18
#define BESB1ORG    0x3d08

#define BESB2C3ORG  0x3d6C
#define BESB2CORG   0x3d1C
#define BESB2ORG    0x3d0C

#define BESHCOORD   0x3d28
#define BESHISCAL   0x3d30
#define BESHSRCEND  0x3d3C
#define BESHSRCLST  0x3d50
#define BESHSRCST   0x3d38
#define BESV1WGHT   0x3d48
#define BESV2WGHT   0x3d4c
#define BESV1SRCLST 0x3d54
#define BESV2SRCLST 0x3d58
#define BESVISCAL   0x3d34
#define BESVCOORD   0x3d2c
#define BESSTATUS   0x3dc4

#define CRTCX	    0x1fd4
#define CRTCD	    0x1fd5
#define	IEN	    0x1e1c
#define ICLEAR	    0x1e18
#define STATUS      0x1e14


#ifdef CRTC2
static void crtc2_frame_sel(int frame)
{
switch(frame) {
case 0:
	cregs.c2pl2startadd0=regs.besa1corg;
	cregs.c2pl3startadd0=regs.besa1c3org;
	cregs.c2startadd0=regs.besa1org;
	break;
case 1:
	cregs.c2pl2startadd0=regs.besa2corg;
	cregs.c2pl3startadd0=regs.besa2c3org;
	cregs.c2startadd0=regs.besa2org;
	break;
case 2:
	cregs.c2pl2startadd0=regs.besb1corg;
	cregs.c2pl3startadd0=regs.besb1c3org;
	cregs.c2startadd0=regs.besb1org;
	break;
case 3:
	cregs.c2pl2startadd0=regs.besb2corg;
	cregs.c2pl3startadd0=regs.besb2c3org;
	cregs.c2startadd0=regs.besb2org;
	break;
}
	writel(cregs.c2startadd0, mga_mmio_base + C2STARTADD0);
	writel(cregs.c2pl2startadd0, mga_mmio_base + C2PL2STARTADD0);
	writel(cregs.c2pl3startadd0, mga_mmio_base + C2PL3STARTADD0);
}
#endif

static int mga_frame_select(unsigned int frame)
{
    mga_next_frame = frame;
    if (mga_verbose>1) printf("[mga] frameselect: %d\n", mga_next_frame);
#if MGA_ALLOW_IRQ
    if (mga_irq == -1)
#endif
    {
	//we don't need the vcount protection as we're only hitting
	//one register (and it doesn't seem to be double buffered)
	regs.besctl = (regs.besctl & ~0x07000000) + (mga_next_frame << 25);
	writel( regs.besctl, mga_mmio_base + BESCTL );

//	writel( regs.besglobctl + ((readl(mga_mmio_base + VCOUNT)+2)<<16),
	writel( regs.besglobctl + (MGA_VSYNC_POS<<16),
			mga_mmio_base + BESGLOBCTL);
#ifdef CRTC2
	crtc2_frame_sel(mga_next_frame);
#endif
    }

    return 0;
}


static void mga_vid_write_regs(int restore)
{
	//Make sure internal registers don't get updated until we're done
	writel( (readl(mga_mmio_base + VCOUNT)-1)<<16,
			mga_mmio_base + BESGLOBCTL);

	// color or coordinate keying

	if(restore && colkey_saved){
	    // restore it
	    colkey_saved=0;

		// Set color key registers:
		writeb( XKEYOPMODE, mga_mmio_base + PALWTADD);
		writeb( colkey_on, mga_mmio_base + X_DATAREG);

		writeb( XCOLKEY0RED, mga_mmio_base + PALWTADD);
		writeb( colkey_color[0], mga_mmio_base + X_DATAREG);
		writeb( XCOLKEY0GREEN, mga_mmio_base + PALWTADD);
		writeb( colkey_color[1], mga_mmio_base + X_DATAREG);
		writeb( XCOLKEY0BLUE, mga_mmio_base + PALWTADD);
		writeb( colkey_color[2], mga_mmio_base + X_DATAREG);
		writeb( X_COLKEY, mga_mmio_base + PALWTADD);
		writeb( colkey_color[3], mga_mmio_base + X_DATAREG);

		writeb( XCOLMSK0RED, mga_mmio_base + PALWTADD);
		writeb( colkey_mask[0], mga_mmio_base + X_DATAREG);
		writeb( XCOLMSK0GREEN, mga_mmio_base + PALWTADD);
		writeb( colkey_mask[1], mga_mmio_base + X_DATAREG);
		writeb( XCOLMSK0BLUE, mga_mmio_base + PALWTADD);
		writeb( colkey_mask[2], mga_mmio_base + X_DATAREG);
		writeb( XCOLMSK, mga_mmio_base + PALWTADD);
		writeb( colkey_mask[3], mga_mmio_base + X_DATAREG);

	} else if(!colkey_saved){
	    // save it
	    colkey_saved=1;
		// Get color key registers:
		writeb( XKEYOPMODE, mga_mmio_base + PALWTADD);
		colkey_on=(unsigned char)readb(mga_mmio_base + X_DATAREG) & 1;

		writeb( XCOLKEY0RED, mga_mmio_base + PALWTADD);
		colkey_color[0]=(unsigned char)readb(mga_mmio_base + X_DATAREG);
		writeb( XCOLKEY0GREEN, mga_mmio_base + PALWTADD);
		colkey_color[1]=(unsigned char)readb(mga_mmio_base + X_DATAREG);
		writeb( XCOLKEY0BLUE, mga_mmio_base + PALWTADD);
		colkey_color[2]=(unsigned char)readb(mga_mmio_base + X_DATAREG);
		writeb( X_COLKEY, mga_mmio_base + PALWTADD);
		colkey_color[3]=(unsigned char)readb(mga_mmio_base + X_DATAREG);

		writeb( XCOLMSK0RED, mga_mmio_base + PALWTADD);
		colkey_mask[0]=(unsigned char)readb(mga_mmio_base + X_DATAREG);
		writeb( XCOLMSK0GREEN, mga_mmio_base + PALWTADD);
		colkey_mask[1]=(unsigned char)readb(mga_mmio_base + X_DATAREG);
		writeb( XCOLMSK0BLUE, mga_mmio_base + PALWTADD);
		colkey_mask[2]=(unsigned char)readb(mga_mmio_base + X_DATAREG);
		writeb( XCOLMSK, mga_mmio_base + PALWTADD);
		colkey_mask[3]=(unsigned char)readb(mga_mmio_base + X_DATAREG);
	}

if(!restore){
	writeb( XKEYOPMODE, mga_mmio_base + PALWTADD);
	writeb( mga_grkey.ckey.op == CKEY_TRUE, mga_mmio_base + X_DATAREG);
	if ( mga_grkey.ckey.op == CKEY_TRUE )
	{
		uint32_t r=0, g=0, b=0;

		writeb( XMULCTRL, mga_mmio_base + PALWTADD);
		switch (readb (mga_mmio_base + X_DATAREG))
		{
			case BPP_8:
				/* Need to look up the color index, just using
														 color 0 for now. */
			break;

			case BPP_15:
				r = mga_grkey.ckey.red   >> 3;
				g = mga_grkey.ckey.green >> 3;
				b = mga_grkey.ckey.blue  >> 3;
			break;

			case BPP_16:
				r = mga_grkey.ckey.red   >> 3;
				g = mga_grkey.ckey.green >> 2;
				b = mga_grkey.ckey.blue  >> 3;
			break;

			case BPP_24:
			case BPP_32_DIR:
			case BPP_32_PAL:
				r = mga_grkey.ckey.red;
				g = mga_grkey.ckey.green;
				b = mga_grkey.ckey.blue;
			break;
		}

		// Enable colorkeying
		writeb( XKEYOPMODE, mga_mmio_base + PALWTADD);
		writeb( 1, mga_mmio_base + X_DATAREG);

		// Disable color keying on alpha channel
		writeb( XCOLMSK, mga_mmio_base + PALWTADD);
		writeb( 0x00, mga_mmio_base + X_DATAREG);
		writeb( X_COLKEY, mga_mmio_base + PALWTADD);
		writeb( 0x00, mga_mmio_base + X_DATAREG);


		// Set up color key registers
		writeb( XCOLKEY0RED, mga_mmio_base + PALWTADD);
		writeb( r, mga_mmio_base + X_DATAREG);
		writeb( XCOLKEY0GREEN, mga_mmio_base + PALWTADD);
		writeb( g, mga_mmio_base + X_DATAREG);
		writeb( XCOLKEY0BLUE, mga_mmio_base + PALWTADD);
		writeb( b, mga_mmio_base + X_DATAREG);

		// Set up color key mask registers
		writeb( XCOLMSK0RED, mga_mmio_base + PALWTADD);
		writeb( 0xff, mga_mmio_base + X_DATAREG);
		writeb( XCOLMSK0GREEN, mga_mmio_base + PALWTADD);
		writeb( 0xff, mga_mmio_base + X_DATAREG);
		writeb( XCOLMSK0BLUE, mga_mmio_base + PALWTADD);
		writeb( 0xff, mga_mmio_base + X_DATAREG);
	}
	else
	{
		// Disable colorkeying
		writeb( XKEYOPMODE, mga_mmio_base + PALWTADD);
		writeb( 0, mga_mmio_base + X_DATAREG);
	}
}

	// Backend Scaler
	writel( regs.besctl,      mga_mmio_base + BESCTL);
	if(is_g400)
		writel( regs.beslumactl,  mga_mmio_base + BESLUMACTL);
	writel( regs.bespitch,    mga_mmio_base + BESPITCH);

	writel( regs.besa1org,    mga_mmio_base + BESA1ORG);
	writel( regs.besa1corg,   mga_mmio_base + BESA1CORG);
	writel( regs.besa2org,    mga_mmio_base + BESA2ORG);
	writel( regs.besa2corg,   mga_mmio_base + BESA2CORG);
	writel( regs.besb1org,    mga_mmio_base + BESB1ORG);
	writel( regs.besb1corg,   mga_mmio_base + BESB1CORG);
	writel( regs.besb2org,    mga_mmio_base + BESB2ORG);
	writel( regs.besb2corg,   mga_mmio_base + BESB2CORG);
	if(is_g400)
	{
		writel( regs.besa1c3org,  mga_mmio_base + BESA1C3ORG);
		writel( regs.besa2c3org,  mga_mmio_base + BESA2C3ORG);
		writel( regs.besb1c3org,  mga_mmio_base + BESB1C3ORG);
		writel( regs.besb2c3org,  mga_mmio_base + BESB2C3ORG);
	}

	writel( regs.beshcoord,   mga_mmio_base + BESHCOORD);
	writel( regs.beshiscal,   mga_mmio_base + BESHISCAL);
	writel( regs.beshsrcst,   mga_mmio_base + BESHSRCST);
	writel( regs.beshsrcend,  mga_mmio_base + BESHSRCEND);
	writel( regs.beshsrclst,  mga_mmio_base + BESHSRCLST);

	writel( regs.besvcoord,   mga_mmio_base + BESVCOORD);
	writel( regs.besviscal,   mga_mmio_base + BESVISCAL);

	writel( regs.besv1srclst, mga_mmio_base + BESV1SRCLST);
	writel( regs.besv1wght,   mga_mmio_base + BESV1WGHT);
	writel( regs.besv2srclst, mga_mmio_base + BESV2SRCLST);
	writel( regs.besv2wght,   mga_mmio_base + BESV2WGHT);

	//update the registers somewhere between 1 and 2 frames from now.
	writel( regs.besglobctl + ((readl(mga_mmio_base + VCOUNT)+2)<<16),
			mga_mmio_base + BESGLOBCTL);

	if (mga_verbose > 1)
	{
	    printf("[mga] wrote BES registers\n");
	    printf("[mga] BESCTL = 0x%08x\n",
			readl(mga_mmio_base + BESCTL));
	    printf("[mga] BESGLOBCTL = 0x%08x\n",
			readl(mga_mmio_base + BESGLOBCTL));
	    printf("[mga] BESSTATUS= 0x%08x\n",
			readl(mga_mmio_base + BESSTATUS));
	}
#ifdef CRTC2
	writel(((readl(mga_mmio_base + C2CTL) & ~0x03e00000) + (cregs.c2ctl & 0x03e00000)),	mga_mmio_base + C2CTL);
	writel(((readl(mga_mmio_base + C2DATACTL) & ~0x000000ff) + (cregs.c2datactl & 0x000000ff)), mga_mmio_base + C2DATACTL);
	// ctrc2
	// disable CRTC2 acording to specs
	writel(cregs.c2misc, mga_mmio_base + C2MISC);

	if (mga_verbose > 1) printf("[mga] c2offset = %d\n",cregs.c2offset);

	writel(cregs.c2offset, mga_mmio_base + C2OFFSET);
	writel(cregs.c2startadd0, mga_mmio_base + C2STARTADD0);
	writel(cregs.c2pl2startadd0, mga_mmio_base + C2PL2STARTADD0);
	writel(cregs.c2pl3startadd0, mga_mmio_base + C2PL3STARTADD0);
	writel(cregs.c2spicstartadd0, mga_mmio_base + C2SPICSTARTADD0);
#endif
}

#if MGA_ALLOW_IRQ
static void enable_irq(void)
{
	long int cc;

	cc = readl(mga_mmio_base + IEN);

	writeb( 0x11, mga_mmio_base + CRTCX);

	writeb(0x20, mga_mmio_base + CRTCD );  /* clear 0, enable off */
	writeb(0x00, mga_mmio_base + CRTCD );  /* enable on */
	writeb(0x10, mga_mmio_base + CRTCD );  /* clear = 1 */

	writel( regs.besglobctl , mga_mmio_base + BESGLOBCTL);

	return;
}

static void disable_irq(void)
{
	writeb( 0x11, mga_mmio_base + CRTCX);
	writeb(0x20, mga_mmio_base + CRTCD );  /* clear 0, enable off */

	return;
}

void mga_handle_irq(int irq, void *dev_id/*, struct pt_regs *pregs*/) {
	long int cc;

	if ( irq != -1 ) {

		cc = readl(mga_mmio_base + STATUS);
		if ( ! (cc & 0x10) ) return;  /* vsyncpen */
	}

	regs.besctl = (regs.besctl & ~0x07000000) + (mga_next_frame << 25);
	writel( regs.besctl, mga_mmio_base + BESCTL );

#ifdef CRTC2
// sem pridat vyber obrazku !!!!
	crtc2_frame_sel(mga_next_frame);
#endif

	if ( irq != -1 ) {
		writeb( 0x11, mga_mmio_base + CRTCX);
		writeb( 0, mga_mmio_base + CRTCD );
		writeb( 0x10, mga_mmio_base + CRTCD );
	}

	return;

}
#endif /* MGA_ALLOW_IRQ */

static int mga_config_playback(vidix_playback_t *config)
{
	unsigned int i;
	int x, y, sw, sh, dw, dh;
	int besleft, bestop, ifactor, ofsleft, ofstop, baseadrofs, weight, weights;
#ifdef CRTC2
#define right_margin 0
#define left_margin 18
#define hsync_len 46
#define lower_margin 10
#define vsync_len 4
#define upper_margin 39

	unsigned int hdispend = (config->src.w + 31) & ~31;
	unsigned int hsyncstart = hdispend + (right_margin & ~7);
	unsigned int hsyncend = hsyncstart + (hsync_len & ~7);
	unsigned int htotal = hsyncend + (left_margin & ~7);
	unsigned int vdispend = config->src.h;
	unsigned int vsyncstart = vdispend + lower_margin;
	unsigned int vsyncend = vsyncstart + vsync_len;
	unsigned int vtotal = vsyncend + upper_margin;
#endif

    if ((config->num_frames < 1) || (config->num_frames > 4))
    {
	printf("[mga] illegal num_frames: %d, setting to %d\n",
	    config->num_frames, MGA_DEFAULT_FRAMES);
	config->num_frames = MGA_DEFAULT_FRAMES;
    }

    x = config->dest.x;
    y = config->dest.y;
    sw = config->src.w;
    sh = config->src.h;
    dw = config->dest.w;
    dh = config->dest.h;

    config->dest.pitch.y=32;
    config->dest.pitch.u=config->dest.pitch.v=32;

    if (mga_verbose) printf("[mga] Setting up a %dx%d-%dx%d video window (src %dx%d) format %X\n",
           dw, dh, x, y, sw, sh, config->fourcc);

    if ((sw < 4) || (sh < 4) || (dw < 4) || (dh < 4))
    {
        printf("[mga] Invalid src/dest dimensions\n");
        return EINVAL;
    }

    //FIXME check that window is valid and inside desktop

    sw+=sw&1;
    switch(config->fourcc)
    {
	case IMGFMT_I420:
	case IMGFMT_IYUV:
	case IMGFMT_YV12:
	    sh+=sh&1;
	    config->frame_size = ((sw + 31) & ~31) * sh + (((sw + 31) & ~31) * sh) / 2;
	    break;
	case IMGFMT_YUY2:
	case IMGFMT_UYVY:
	    config->frame_size = ((sw + 31) & ~31) * sh * 2;
	    break;
	default:
	    printf("[mga] Unsupported pixel format: %x\n", config->fourcc);
	    return ENOTSUP;
    }

    config->offsets[0] = 0;
    for (i = 1; i < config->num_frames+1; i++)
	config->offsets[i] = i*config->frame_size;

    config->offset.y=0;
    if(config->fourcc == IMGFMT_I420 || config->fourcc == IMGFMT_IYUV)
    {
	config->offset.u=((sw + 31) & ~31) * sh;
	config->offset.v=config->offset.u+((sw + 31) & ~31) * sh /4;
    }
    else {
	config->offset.v=((sw + 31) & ~31) * sh;
	config->offset.u=config->offset.v+((sw + 31) & ~31) * sh /4;
    }

    mga_src_base = (mga_ram_size*0x100000-config->num_frames*config->frame_size);
    if (mga_src_base < 0)
    {
    	printf("[mga] not enough memory for frames!\n");
    	return EFAULT;
    }
    mga_src_base &= (~0xFFFF); /* 64k boundary */
    if (mga_verbose > 1) printf("[mga] YUV buffer base: %#x\n", mga_src_base);

    config->dga_addr = mga_mem_base + mga_src_base;

    /* for G200 set Interleaved UV planes */
    if (!is_g400)
	config->flags = VID_PLAY_INTERLEAVED_UV | INTERLEAVING_UV;

    //Setup the BES registers for a three plane 4:2:0 video source

    regs.besglobctl = 0;

    switch(config->fourcc)
    {
	case IMGFMT_YV12:
	case IMGFMT_I420:
	case IMGFMT_IYUV:
	regs.besctl = 1         // BES enabled
                    + (0<<6)    // even start polarity
                    + (1<<10)   // x filtering enabled
                    + (1<<11)   // y filtering enabled
                    + (1<<16)   // chroma upsampling
                    + (1<<17)   // 4:2:0 mode
                    + (1<<18);  // dither enabled
        break;

    case IMGFMT_YUY2:
	regs.besctl = 1         // BES enabled
                    + (0<<6)    // even start polarity
                    + (1<<10)   // x filtering enabled
                    + (1<<11)   // y filtering enabled
                    + (1<<16)   // chroma upsampling
                    + (0<<17)   // 4:2:2 mode
                    + (1<<18);  // dither enabled

	regs.besglobctl = 0;        // YUY2 format selected
        break;

    case IMGFMT_UYVY:
	regs.besctl = 1         // BES enabled
                    + (0<<6)    // even start polarity
                    + (1<<10)   // x filtering enabled
                    + (1<<11)   // y filtering enabled
                    + (1<<16)   // chroma upsampling
                    + (0<<17)   // 4:2:2 mode
                    + (1<<18);  // dither enabled

	regs.besglobctl = 1<<6;        // UYVY format selected
        break;

    }

	//Disable contrast and brightness control
	regs.besglobctl |= (1<<5) + (1<<7);
	regs.beslumactl = (0x7f << 16) + (0x80<<0);
	regs.beslumactl = 0x80<<0;

	//Setup destination window boundaries
	besleft = x > 0 ? x : 0;
	bestop = y > 0 ? y : 0;
	regs.beshcoord = (besleft<<16) + (x + dw-1);
	regs.besvcoord = (bestop<<16) + (y + dh-1);

	//Setup source dimensions
	regs.beshsrclst  = (sw - 1) << 16;
	regs.bespitch = (sw + 31) & ~31 ;

	//Setup horizontal scaling
	ifactor = ((sw-1)<<14)/(dw-1);
	ofsleft = besleft - x;

	regs.beshiscal = ifactor<<2;
	regs.beshsrcst = (ofsleft*ifactor)<<2;
	regs.beshsrcend = regs.beshsrcst + (((dw - ofsleft - 1) * ifactor) << 2);

	//Setup vertical scaling
	ifactor = ((sh-1)<<14)/(dh-1);
	ofstop = bestop - y;

	regs.besviscal = ifactor<<2;

	baseadrofs = ((ofstop*regs.besviscal)>>16)*regs.bespitch;
	regs.besa1org = (uint32_t) mga_src_base + baseadrofs;
	regs.besa2org = (uint32_t) mga_src_base + baseadrofs + 1*config->frame_size;
	regs.besb1org = (uint32_t) mga_src_base + baseadrofs + 2*config->frame_size;
	regs.besb2org = (uint32_t) mga_src_base + baseadrofs + 3*config->frame_size;

if(config->fourcc==IMGFMT_YV12
 ||config->fourcc==IMGFMT_IYUV
 ||config->fourcc==IMGFMT_I420
 ){
        // planar YUV frames:
	if (is_g400)
		baseadrofs = (((ofstop*regs.besviscal)/4)>>16)*regs.bespitch;
	else
		baseadrofs = (((ofstop*regs.besviscal)/2)>>16)*regs.bespitch;

    if(config->fourcc==IMGFMT_YV12){
	regs.besa1corg = (uint32_t) mga_src_base + baseadrofs + regs.bespitch * sh ;
	regs.besa2corg = (uint32_t) mga_src_base + baseadrofs + 1*config->frame_size + regs.bespitch * sh;
	regs.besb1corg = (uint32_t) mga_src_base + baseadrofs + 2*config->frame_size + regs.bespitch * sh;
	regs.besb2corg = (uint32_t) mga_src_base + baseadrofs + 3*config->frame_size + regs.bespitch * sh;
	regs.besa1c3org = regs.besa1corg + ((regs.bespitch * sh) / 4);
	regs.besa2c3org = regs.besa2corg + ((regs.bespitch * sh) / 4);
	regs.besb1c3org = regs.besb1corg + ((regs.bespitch * sh) / 4);
	regs.besb2c3org = regs.besb2corg + ((regs.bespitch * sh) / 4);
    } else {
	regs.besa1c3org = (uint32_t) mga_src_base + baseadrofs + regs.bespitch * sh ;
	regs.besa2c3org = (uint32_t) mga_src_base + baseadrofs + 1*config->frame_size + regs.bespitch * sh;
	regs.besb1c3org = (uint32_t) mga_src_base + baseadrofs + 2*config->frame_size + regs.bespitch * sh;
	regs.besb2c3org = (uint32_t) mga_src_base + baseadrofs + 3*config->frame_size + regs.bespitch * sh;
	regs.besa1corg = regs.besa1c3org + ((regs.bespitch * sh) / 4);
	regs.besa2corg = regs.besa2c3org + ((regs.bespitch * sh) / 4);
	regs.besb1corg = regs.besb1c3org + ((regs.bespitch * sh) / 4);
	regs.besb2corg = regs.besb2c3org + ((regs.bespitch * sh) / 4);
    }

}

    weight = ofstop * (regs.besviscal >> 2);
    weights = weight < 0 ? 1 : 0;
    regs.besv2wght = regs.besv1wght = (weights << 16) + ((weight & 0x3FFF) << 2);
    regs.besv2srclst = regs.besv1srclst = sh - 1 - (((ofstop * regs.besviscal) >> 16) & 0x03FF);

#ifdef CRTC2
	// pridat hlavni registry - tj. casovani ...


switch(config->fourcc){
    case IMGFMT_YV12:
    case IMGFMT_I420:
    case IMGFMT_IYUV:
	cregs.c2ctl = 1         // CRTC2 enabled
		    + (1<<1)	// external clock
		    + (0<<2)	// external clock
		    + (1<<3)	// pixel clock enable - not needed ???
		    + (0<<4)	// high prioryty req
		    + (1<<5)	// high prioryty req
		    + (0<<6)	// high prioryty req
		    + (1<<8)	// high prioryty req max
		    + (0<<9)	// high prioryty req max
		    + (0<<10)	// high prioryty req max
                    + (0<<20)   // CRTC1 to DAC
                    + (1<<21)   // 420 mode
                    + (1<<22)   // 420 mode
                    + (1<<23)   // 420 mode
                    + (0<<24)   // single chroma line for 420 mode - need to be corrected
                    + (0<<25)   /*/ interlace mode - need to be corrected*/
                    + (0<<26)   // field legth polariry
                    + (0<<27)   // field identification polariry
                    + (1<<28)   // VIDRST detection mode
                    + (0<<29)   // VIDRST detection mode
                    + (1<<30)   // Horizontal counter preload
                    + (1<<31)   // Vertical counter preload
		    ;
	cregs.c2datactl = 1         // disable dither - propably not needed, we are already in YUV mode
		    + (1<<1)	// Y filter enable
		    + (1<<2)	// CbCr filter enable
		    + (0<<3)	// subpicture enable (disabled)
		    + (0<<4)	// NTSC enable (disabled - PAL)
		    + (0<<5)	// C2 static subpicture enable (disabled)
		    + (0<<6)	// C2 subpicture offset division (disabled)
		    + (0<<7)	// 422 subformat selection !
/*		    + (0<<8)	// 15 bpp high alpha
		    + (0<<9)	// 15 bpp high alpha
		    + (0<<10)	// 15 bpp high alpha
		    + (0<<11)	// 15 bpp high alpha
		    + (0<<12)	// 15 bpp high alpha
		    + (0<<13)	// 15 bpp high alpha
		    + (0<<14)	// 15 bpp high alpha
		    + (0<<15)	// 15 bpp high alpha
		    + (0<<16)	// 15 bpp low alpha
		    + (0<<17)	// 15 bpp low alpha
		    + (0<<18)	// 15 bpp low alpha
		    + (0<<19)	// 15 bpp low alpha
		    + (0<<20)	// 15 bpp low alpha
		    + (0<<21)	// 15 bpp low alpha
		    + (0<<22)	// 15 bpp low alpha
		    + (0<<23)	// 15 bpp low alpha
		    + (0<<24)	// static subpicture key
		    + (0<<25)	// static subpicture key
		    + (0<<26)	// static subpicture key
		    + (0<<27)	// static subpicture key
		    + (0<<28)	// static subpicture key
*/		    ;
        break;

    case IMGFMT_YUY2:
	cregs.c2ctl = 1         // CRTC2 enabled
		    + (1<<1)	// external clock
		    + (0<<2)	// external clock
		    + (1<<3)	// pixel clock enable - not needed ???
		    + (0<<4)	// high prioryty req - acc to spec
		    + (1<<5)	// high prioryty req
		    + (0<<6)	// high prioryty req
				// 7 reserved
		    + (1<<8)	// high prioryty req max
		    + (0<<9)	// high prioryty req max
		    + (0<<10)	// high prioryty req max
				// 11-19 reserved
                    + (0<<20)   // CRTC1 to DAC
                    + (1<<21)   // 422 mode
                    + (0<<22)   // 422 mode
                    + (1<<23)   // 422 mode
                    + (0<<24)   // single chroma line for 420 mode - need to be corrected
                    + (0<<25)   /*/ interlace mode - need to be corrected*/
                    + (0<<26)   // field legth polariry
                    + (0<<27)   // field identification polariry
                    + (1<<28)   // VIDRST detection mode
                    + (0<<29)   // VIDRST detection mode
                    + (1<<30)   // Horizontal counter preload
                    + (1<<31)   // Vertical counter preload
		    ;
	cregs.c2datactl = 1         // disable dither - propably not needed, we are already in YUV mode
		    + (1<<1)	// Y filter enable
		    + (1<<2)	// CbCr filter enable
		    + (0<<3)	// subpicture enable (disabled)
		    + (0<<4)	// NTSC enable (disabled - PAL)
		    + (0<<5)	// C2 static subpicture enable (disabled)
		    + (0<<6)	// C2 subpicture offset division (disabled)
		    + (0<<7)	// 422 subformat selection !
/*		    + (0<<8)	// 15 bpp high alpha
		    + (0<<9)	// 15 bpp high alpha
		    + (0<<10)	// 15 bpp high alpha
		    + (0<<11)	// 15 bpp high alpha
		    + (0<<12)	// 15 bpp high alpha
		    + (0<<13)	// 15 bpp high alpha
		    + (0<<14)	// 15 bpp high alpha
		    + (0<<15)	// 15 bpp high alpha
		    + (0<<16)	// 15 bpp low alpha
		    + (0<<17)	// 15 bpp low alpha
		    + (0<<18)	// 15 bpp low alpha
		    + (0<<19)	// 15 bpp low alpha
		    + (0<<20)	// 15 bpp low alpha
		    + (0<<21)	// 15 bpp low alpha
		    + (0<<22)	// 15 bpp low alpha
		    + (0<<23)	// 15 bpp low alpha
		    + (0<<24)	// static subpicture key
		    + (0<<25)	// static subpicture key
		    + (0<<26)	// static subpicture key
		    + (0<<27)	// static subpicture key
		    + (0<<28)	// static subpicture key
*/			;
          break;

    case IMGFMT_UYVY:
	cregs.c2ctl = 1         // CRTC2 enabled
		    + (1<<1)	// external clock
		    + (0<<2)	// external clock
		    + (1<<3)	// pixel clock enable - not needed ???
		    + (0<<4)	// high prioryty req
		    + (1<<5)	// high prioryty req
		    + (0<<6)	// high prioryty req
		    + (1<<8)	// high prioryty req max
		    + (0<<9)	// high prioryty req max
		    + (0<<10)	// high prioryty req max
                    + (0<<20)   // CRTC1 to DAC
                    + (1<<21)   // 422 mode
                    + (0<<22)   // 422 mode
                    + (1<<23)   // 422 mode
                    + (1<<24)   // single chroma line for 420 mode - need to be corrected
                    + (1<<25)   /*/ interlace mode - need to be corrected*/
                    + (0<<26)   // field legth polariry
                    + (0<<27)   // field identification polariry
                    + (1<<28)   // VIDRST detection mode
                    + (0<<29)   // VIDRST detection mode
                    + (1<<30)   // Horizontal counter preload
                    + (1<<31)   // Vertical counter preload
		    ;
	cregs.c2datactl = 0         // enable dither - propably not needed, we are already in YUV mode
		    + (1<<1)	// Y filter enable
		    + (1<<2)	// CbCr filter enable
		    + (0<<3)	// subpicture enable (disabled)
		    + (0<<4)	// NTSC enable (disabled - PAL)
		    + (0<<5)	// C2 static subpicture enable (disabled)
		    + (0<<6)	// C2 subpicture offset division (disabled)
		    + (1<<7)	// 422 subformat selection !
/*		    + (0<<8)	// 15 bpp high alpha
		    + (0<<9)	// 15 bpp high alpha
		    + (0<<10)	// 15 bpp high alpha
		    + (0<<11)	// 15 bpp high alpha
		    + (0<<12)	// 15 bpp high alpha
		    + (0<<13)	// 15 bpp high alpha
		    + (0<<14)	// 15 bpp high alpha
		    + (0<<15)	// 15 bpp high alpha
		    + (0<<16)	// 15 bpp low alpha
		    + (0<<17)	// 15 bpp low alpha
		    + (0<<18)	// 15 bpp low alpha
		    + (0<<19)	// 15 bpp low alpha
		    + (0<<20)	// 15 bpp low alpha
		    + (0<<21)	// 15 bpp low alpha
		    + (0<<22)	// 15 bpp low alpha
		    + (0<<23)	// 15 bpp low alpha
		    + (0<<24)	// static subpicture key
		    + (0<<25)	// static subpicture key
		    + (0<<26)	// static subpicture key
		    + (0<<27)	// static subpicture key
		    + (0<<28)	// static subpicture key
*/		    ;
        break;
    }

	cregs.c2hparam=((hdispend - 8) << 16) | (htotal - 8);
	cregs.c2hsync=((hsyncend - 8) << 16) | (hsyncstart - 8);

	cregs.c2misc=0	// CRTCV2 656 togg f0
		    +(0<<1) // CRTCV2 656 togg f0
		    +(0<<2) // CRTCV2 656 togg f0
		    +(0<<4) // CRTCV2 656 togg f1
		    +(0<<5) // CRTCV2 656 togg f1
		    +(0<<6) // CRTCV2 656 togg f1
		    +(0<<8) // Hsync active high
		    +(0<<9) // Vsync active high
		    // 16-27 c2vlinecomp - nevim co tam dat
		    ;
	cregs.c2offset=(regs.bespitch << 1);

	cregs.c2pl2startadd0=regs.besa1corg;
	cregs.c2pl3startadd0=regs.besa1c3org;

	cregs.c2preload=(vsyncstart << 16) | (hsyncstart); // from

	cregs.c2spicstartadd0=0; // not used

    cregs.c2startadd0=regs.besa1org;

    cregs.c2subpiclut=0; //not used

    cregs.c2vparam=((vdispend - 1) << 16) | (vtotal - 1);
    cregs.c2vsync=((vsyncend - 1) << 16) | (vsyncstart - 1);
#endif /* CRTC2 */

    mga_vid_write_regs(0);
    return 0;
}

static int mga_playback_on(void)
{
    if (mga_verbose) printf("[mga] playback on\n");

    vid_src_ready = 1;
    if(vid_overlay_on)
    {
	regs.besctl |= 1;
    	mga_vid_write_regs(0);
    }
#if MGA_ALLOW_IRQ
    if (mga_irq != -1)
	enable_irq();
#endif
    mga_next_frame=0;

    return 0;
}

static int mga_playback_off(void)
{
    if (mga_verbose) printf("[mga] playback off\n");

    vid_src_ready = 0;
#if MGA_ALLOW_IRQ
    if (mga_irq != -1)
	disable_irq();
#endif
    regs.besctl &= ~1;
    regs.besglobctl &= ~(1<<6); /* UYVY format selected */
    mga_vid_write_regs(0);

    return 0;
}

static int mga_probe(int verbose,int force)
{
	pciinfo_t lst[MAX_PCI_DEVICES];
	unsigned int i, num_pci;
	int err;

	if (verbose) printf("[mga] probe\n");

	mga_verbose = verbose;

	is_g400 = -1;

	err = pci_scan(lst, &num_pci);
	if (err)
	{
	    printf("[mga] Error occurred during pci scan: %s\n", strerror(err));
	    return err;
	}

	if (mga_verbose)
	    printf("[mga] found %d pci devices\n", num_pci);

	for (i = 0; i < num_pci; i++)
	{
	    if (mga_verbose > 1)
		printf("[mga] pci[%d] vendor: %d device: %d\n",
		    i, lst[i].vendor, lst[i].device);
	    if (lst[i].vendor == VENDOR_MATROX)
	    {
#if 0
		if ((lst[i].command & PCI_COMMAND_IO) == 0)
		{
			printf("[mga] Device is disabled, ignoring\n");
			continue;
		}
#endif
		switch(lst[i].device)
		{
		    case DEVICE_MATROX_MGA_G550_AGP:
			printf("[mga] Found MGA G550\n");
			is_g400 = 1;
			goto card_found;
		    case DEVICE_MATROX_MGA_G400_G450:
			printf("[mga] Found MGA G400/G450\n");
			is_g400 = 1;
			goto card_found;
		    case DEVICE_MATROX_MGA_G200_AGP:
			printf("[mga] Found MGA G200 AGP\n");
			is_g400 = 0;
			goto card_found;
		    case DEVICE_MATROX_MGA_G200:
			printf("[mga] Found MGA G200 PCI\n");
			is_g400 = 0;
			goto card_found;
		}
	    }
	}

	if (is_g400 == -1)
	{
		if (verbose) printf("[mga] Can't find chip\n");
		return ENXIO;
	}

card_found:
	probed = 1;
	memcpy(&pci_info, &lst[i], sizeof(pciinfo_t));

	mga_cap.device_id = pci_info.device; /* set device id in capabilites */

	return 0;
}

static int mga_init(void)
{
    unsigned int card_option = 0;
    int err;

    if (mga_verbose) printf("[mga] init\n");

    mga_vid_in_use = 0;

    printf("Matrox MGA G200/G400/G450 YUV Video interface v2.01 (c) Aaron Holtzman & A'rpi\n");
#ifdef CRTC2
    printf("Driver compiled with TV-out (second-head) support\n");
#endif

    if (!probed)
    {
	printf("[mga] driver was not probed but is being initializing\n");
	return EINTR;
    }

#ifdef MGA_PCICONFIG_MEMDETECT
    pci_config_read(pci_info.bus, pci_info.card, pci_info.func,
        0x40, 4, &card_option);
    if (mga_verbose > 1) printf("[mga] OPTION word: 0x%08X  mem: 0x%02X  %s\n", card_option,
    	(card_option>>10)&0x17, ((card_option>>14)&1)?"SGRAM":"SDRAM");
#endif

    if (mga_ram_size)
    {
    	printf("[mga] RAMSIZE forced to %d MB\n", mga_ram_size);
    }
    else
    {
#ifdef MGA_MEMORY_SIZE
        mga_ram_size = MGA_MEMORY_SIZE;
        printf("[mga] hard-coded RAMSIZE is %d MB\n", (unsigned int) mga_ram_size);
#else
        if (is_g400)
	{
	    switch((card_option>>10)&0x17)
	    {
	        // SDRAM:
	        case 0x00:
	        case 0x04:  mga_ram_size = 16; break;
	        case 0x03:  mga_ram_size = 32; break;
	        // SGRAM:
	        case 0x10:
	        case 0x14:  mga_ram_size = 32; break;
	        case 0x11:
	        case 0x12:  mga_ram_size = 16; break;
	        default:
	    	    mga_ram_size = 16;
		    printf("[mga] Couldn't detect RAMSIZE, assuming 16MB!\n");
	    }
	}
	else
	{
	    switch((card_option>>10)&0x17)
	    {
		default: mga_ram_size = 8;
	    }
	}

        printf("[mga] detected RAMSIZE is %d MB\n", (unsigned int) mga_ram_size);
#endif
    }

    if (mga_ram_size)
    {
	if ((mga_ram_size < 4) || (mga_ram_size > 64))
	{
	    printf("[mga] invalid RAMSIZE: %d MB\n", mga_ram_size);
	    return EINVAL;
	}
    }

    if (mga_verbose > 1) printf("[mga] hardware addresses: mmio: %#x, framebuffer: %#x\n",
        pci_info.base1, pci_info.base0);

    mga_mmio_base = map_phys_mem(pci_info.base1,0x4000);
    mga_mem_base = map_phys_mem(pci_info.base0,mga_ram_size*1024*1024);

    if (mga_verbose > 1) printf("[mga] MMIO at %p, IRQ: %d, framebuffer: %p\n",
        mga_mmio_base, mga_irq, mga_mem_base);
    err = mtrr_set_type(pci_info.base0,mga_ram_size*1024*1024,MTRR_TYPE_WRCOMB);
    if(!err) printf("[mga] Set write-combining type of video memory\n");
#if MGA_ALLOW_IRQ
    if (mga_irq != -1)
    {
    	int tmp = request_irq(mga_irq, mga_handle_irq, SA_INTERRUPT | SA_SHIRQ, "Syncfb Time Base", &mga_irq);
    	if (tmp)
	{
    	    printf("syncfb (mga): cannot register irq %d (Err: %d)\n", mga_irq, tmp);
    	    mga_irq=-1;
	}
	else
	{
	    printf("syncfb (mga): registered irq %d\n", mga_irq);
	}
    }
    else
    {
	printf("syncfb (mga): No valid irq was found\n");
	mga_irq=-1;
    }
#else
	printf("syncfb (mga): IRQ disabled in mga_vid.c\n");
	mga_irq=-1;
#endif

    return 0;
}

static void mga_destroy(void)
{
    if (mga_verbose) printf("[mga] destroy\n");

    /* FIXME turn off BES */
    vid_src_ready = 0;
    regs.besctl &= ~1;
    regs.besglobctl &= ~(1<<6);  // UYVY format selected
    mga_vid_write_regs(1);
    mga_vid_in_use = 0;

#if MGA_ALLOW_IRQ
    if (mga_irq != -1)
    	free_irq(mga_irq, &mga_irq);
#endif

    if (mga_mmio_base)
        unmap_phys_mem(mga_mmio_base, 0x4000);
    if (mga_mem_base)
        unmap_phys_mem(mga_mem_base, mga_ram_size);
    return;
}

static int mga_query_fourcc(vidix_fourcc_t *to)
{
    if (mga_verbose) printf("[mga] query fourcc (%x)\n", to->fourcc);

    switch(to->fourcc)
    {
	case IMGFMT_YV12:
	case IMGFMT_IYUV:
	case IMGFMT_I420:
	case IMGFMT_YUY2:
	case IMGFMT_UYVY:
	    break;
	default:
	    to->depth = to->flags = 0;
	    return ENOTSUP;
    }

    to->depth = VID_DEPTH_12BPP |
		VID_DEPTH_15BPP | VID_DEPTH_16BPP |
		VID_DEPTH_24BPP | VID_DEPTH_32BPP;
    to->flags = VID_CAP_EXPAND | VID_CAP_SHRINK | VID_CAP_COLORKEY;
    return 0;
}

static int mga_get_caps(vidix_capability_t *to)
{
    memcpy(to, &mga_cap, sizeof(vidix_capability_t));
    return 0;
}

static int mga_get_gkeys(vidix_grkey_t *grkey)
{
    memcpy(grkey, &mga_grkey, sizeof(vidix_grkey_t));
    return 0;
}

static int mga_set_gkeys(const vidix_grkey_t *grkey)
{
    memcpy(&mga_grkey, grkey, sizeof(vidix_grkey_t));
    mga_vid_write_regs(0);
    return 0;
}

static int mga_set_eq( const vidix_video_eq_t * eq)
{
    /* contrast and brightness control isn't supported on G200 - alex */
    if (!is_g400)
    {
	if (mga_verbose) printf("[mga] equalizer isn't supported with G200\n");
	return ENOTSUP;
    }

    // only brightness&contrast are supported:
    if(!(eq->cap & (VEQ_CAP_BRIGHTNESS|VEQ_CAP_CONTRAST)))
	return ENOTSUP;

    //regs.beslumactl = readl(mga_mmio_base + BESLUMACTL);
    if (eq->cap & VEQ_CAP_BRIGHTNESS) {
	regs.beslumactl &= 0xFFFF;
	regs.beslumactl |= (eq->brightness*255/2000)<<16;
    }
    if (eq->cap & VEQ_CAP_CONTRAST) {
	regs.beslumactl &= 0xFFFF0000;
	regs.beslumactl |= (128+eq->contrast*255/2000)&0xFFFF;
    }
    writel(regs.beslumactl,mga_mmio_base + BESLUMACTL);

    return 0;
}

static int mga_get_eq( vidix_video_eq_t * eq)
{
    /* contrast and brightness control isn't supported on G200 - alex */
    if (!is_g400)
    {
	if (mga_verbose) printf("[mga] equalizer isn't supported with G200\n");
	return ENOTSUP;
    }

    eq->brightness = (signed short int)(regs.beslumactl >> 16) * 1000 / 128;
    eq->contrast = (signed short int)(regs.beslumactl & 0xFFFF) * 1000 / 128 - 1000;
    eq->cap = VEQ_CAP_BRIGHTNESS | VEQ_CAP_CONTRAST;

    printf("MGA GET_EQ: br=%d c=%d  \n",eq->brightness,eq->contrast);

    return 0;
}

#ifndef CRTC2
VDXDriver mga_drv = {
  "mga",
#else
VDXDriver mga_crtc2_drv = {
  "mga_crtc2",
#endif
  NULL,

  .probe = mga_probe,
  .get_caps = mga_get_caps,
  .query_fourcc = mga_query_fourcc,
  .init = mga_init,
  .destroy = mga_destroy,
  .config_playback = mga_config_playback,
  .playback_on = mga_playback_on,
  .playback_off = mga_playback_off,
  .frame_sel = mga_frame_select,
  .get_eq = mga_get_eq,
  .set_eq = mga_set_eq,
  .get_gkey = mga_get_gkeys,
  .set_gkey = mga_set_gkeys,
};