aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/video/ivtv/ivtv-yuv.c
blob: 3092ff1d00a066a24a4d04b3de06f1999159a299 (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
/*
    yuv support

    Copyright (C) 2007  Ian Armstrong <ian@iarmst.demon.co.uk>

    This program 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.

    This program 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 this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "ivtv-driver.h"
#include "ivtv-udma.h"
#include "ivtv-yuv.h"

/* YUV buffer offsets */
const u32 yuv_offset[IVTV_YUV_BUFFERS] = {
	0x001a8600,
	0x00240400,
	0x002d8200,
	0x00370000,
	0x00029000,
	0x000C0E00,
	0x006B0400,
	0x00748200
};

static int ivtv_yuv_prep_user_dma(struct ivtv *itv, struct ivtv_user_dma *dma,
				  struct ivtv_dma_frame *args)
{
	struct ivtv_dma_page_info y_dma;
	struct ivtv_dma_page_info uv_dma;
	struct yuv_playback_info *yi = &itv->yuv_info;
	u8 frame = yi->draw_frame;
	struct yuv_frame_info *f = &yi->new_frame_info[frame];
	int i;
	int y_pages, uv_pages;
	unsigned long y_buffer_offset, uv_buffer_offset;
	int y_decode_height, uv_decode_height, y_size;

	y_buffer_offset = IVTV_DECODER_OFFSET + yuv_offset[frame];
	uv_buffer_offset = y_buffer_offset + IVTV_YUV_BUFFER_UV_OFFSET;

	y_decode_height = uv_decode_height = f->src_h + f->src_y;

	if (f->offset_y)
		y_buffer_offset += 720 * 16;

	if (y_decode_height & 15)
		y_decode_height = (y_decode_height + 16) & ~15;

	if (uv_decode_height & 31)
		uv_decode_height = (uv_decode_height + 32) & ~31;

	y_size = 720 * y_decode_height;

	/* Still in USE */
	if (dma->SG_length || dma->page_count) {
		IVTV_DEBUG_WARN
		    ("prep_user_dma: SG_length %d page_count %d still full?\n",
		     dma->SG_length, dma->page_count);
		return -EBUSY;
	}

	ivtv_udma_get_page_info (&y_dma, (unsigned long)args->y_source, 720 * y_decode_height);
	ivtv_udma_get_page_info (&uv_dma, (unsigned long)args->uv_source, 360 * uv_decode_height);

	/* Get user pages for DMA Xfer */
	down_read(&current->mm->mmap_sem);
	y_pages = get_user_pages(current, current->mm, y_dma.uaddr, y_dma.page_count, 0, 1, &dma->map[0], NULL);
	uv_pages = get_user_pages(current, current->mm, uv_dma.uaddr, uv_dma.page_count, 0, 1, &dma->map[y_pages], NULL);
	up_read(&current->mm->mmap_sem);

	dma->page_count = y_dma.page_count + uv_dma.page_count;

	if (y_pages + uv_pages != dma->page_count) {
		IVTV_DEBUG_WARN
		    ("failed to map user pages, returned %d instead of %d\n",
		     y_pages + uv_pages, dma->page_count);

		for (i = 0; i < dma->page_count; i++) {
			put_page(dma->map[i]);
		}
		dma->page_count = 0;
		return -EINVAL;
	}

	/* Fill & map SG List */
	if (ivtv_udma_fill_sg_list (dma, &uv_dma, ivtv_udma_fill_sg_list (dma, &y_dma, 0)) < 0) {
		IVTV_DEBUG_WARN("could not allocate bounce buffers for highmem userspace buffers\n");
		for (i = 0; i < dma->page_count; i++) {
			put_page(dma->map[i]);
		}
		dma->page_count = 0;
		return -ENOMEM;
	}
	dma->SG_length = pci_map_sg(itv->dev, dma->SGlist, dma->page_count, PCI_DMA_TODEVICE);

	/* Fill SG Array with new values */
	ivtv_udma_fill_sg_array(dma, y_buffer_offset, uv_buffer_offset, y_size);

	/* If we've offset the y plane, ensure top area is blanked */
	if (f->offset_y && yi->blanking_dmaptr) {
		dma->SGarray[dma->SG_length].size = cpu_to_le32(720*16);
		dma->SGarray[dma->SG_length].src = cpu_to_le32(yi->blanking_dmaptr);
		dma->SGarray[dma->SG_length].dst = cpu_to_le32(IVTV_DECODER_OFFSET + yuv_offset[frame]);
		dma->SG_length++;
	}

	/* Tag SG Array with Interrupt Bit */
	dma->SGarray[dma->SG_length - 1].size |= cpu_to_le32(0x80000000);

	ivtv_udma_sync_for_device(itv);
	return 0;
}

/* We rely on a table held in the firmware - Quick check. */
int ivtv_yuv_filter_check(struct ivtv *itv)
{
	int i, y, uv;

	for (i = 0, y = 16, uv = 4; i < 16; i++, y += 24, uv += 12) {
		if ((read_dec(IVTV_YUV_HORIZONTAL_FILTER_OFFSET + y) != i << 16) ||
		    (read_dec(IVTV_YUV_VERTICAL_FILTER_OFFSET + uv) != i << 16)) {
			IVTV_WARN ("YUV filter table not found in firmware.\n");
			return -1;
		}
	}
	return 0;
}

static void ivtv_yuv_filter(struct ivtv *itv, int h_filter, int v_filter_1, int v_filter_2)
{
	u32 i, line;

	/* If any filter is -1, then don't update it */
	if (h_filter > -1) {
		if (h_filter > 4)
			h_filter = 4;
		i = IVTV_YUV_HORIZONTAL_FILTER_OFFSET + (h_filter * 384);
		for (line = 0; line < 16; line++) {
			write_reg(read_dec(i), 0x02804);
			write_reg(read_dec(i), 0x0281c);
			i += 4;
			write_reg(read_dec(i), 0x02808);
			write_reg(read_dec(i), 0x02820);
			i += 4;
			write_reg(read_dec(i), 0x0280c);
			write_reg(read_dec(i), 0x02824);
			i += 4;
			write_reg(read_dec(i), 0x02810);
			write_reg(read_dec(i), 0x02828);
			i += 4;
			write_reg(read_dec(i), 0x02814);
			write_reg(read_dec(i), 0x0282c);
			i += 8;
			write_reg(0, 0x02818);
			write_reg(0, 0x02830);
		}
		IVTV_DEBUG_YUV("h_filter -> %d\n", h_filter);
	}

	if (v_filter_1 > -1) {
		if (v_filter_1 > 4)
			v_filter_1 = 4;
		i = IVTV_YUV_VERTICAL_FILTER_OFFSET + (v_filter_1 * 192);
		for (line = 0; line < 16; line++) {
			write_reg(read_dec(i), 0x02900);
			i += 4;
			write_reg(read_dec(i), 0x02904);
			i += 8;
			write_reg(0, 0x02908);
		}
		IVTV_DEBUG_YUV("v_filter_1 -> %d\n", v_filter_1);
	}

	if (v_filter_2 > -1) {
		if (v_filter_2 > 4)
			v_filter_2 = 4;
		i = IVTV_YUV_VERTICAL_FILTER_OFFSET + (v_filter_2 * 192);
		for (line = 0; line < 16; line++) {
			write_reg(read_dec(i), 0x0290c);
			i += 4;
			write_reg(read_dec(i), 0x02910);
			i += 8;
			write_reg(0, 0x02914);
		}
		IVTV_DEBUG_YUV("v_filter_2 -> %d\n", v_filter_2);
	}
}

static void ivtv_yuv_handle_horizontal(struct ivtv *itv, struct yuv_frame_info *f)
{
	struct yuv_playback_info *yi = &itv->yuv_info;
	u32 reg_2834, reg_2838, reg_283c;
	u32 reg_2844, reg_2854, reg_285c;
	u32 reg_2864, reg_2874, reg_2890;
	u32 reg_2870, reg_2870_base, reg_2870_offset;
	int x_cutoff;
	int h_filter;
	u32 master_width;

	IVTV_DEBUG_WARN
	    ("Adjust to width %d src_w %d dst_w %d src_x %d dst_x %d\n",
	     f->tru_w, f->src_w, f->dst_w, f->src_x, f->dst_x);

	/* How wide is the src image */
	x_cutoff = f->src_w + f->src_x;

	/* Set the display width */
	reg_2834 = f->dst_w;
	reg_2838 = reg_2834;

	/* Set the display position */
	reg_2890 = f->dst_x;

	/* Index into the image horizontally */
	reg_2870 = 0;

	/* 2870 is normally fudged to align video coords with osd coords.
	   If running full screen, it causes an unwanted left shift
	   Remove the fudge if we almost fill the screen.
	   Gradually adjust the offset to avoid the video 'snapping'
	   left/right if it gets dragged through this region.
	   Only do this if osd is full width. */
	if (f->vis_w == 720) {
		if ((f->tru_x - f->pan_x > -1) && (f->tru_x - f->pan_x <= 40) && (f->dst_w >= 680))
			reg_2870 = 10 - (f->tru_x - f->pan_x) / 4;
		else if ((f->tru_x - f->pan_x < 0) && (f->tru_x - f->pan_x >= -20) && (f->dst_w >= 660))
			reg_2870 = (10 + (f->tru_x - f->pan_x) / 2);

		if (f->dst_w >= f->src_w)
			reg_2870 = reg_2870 << 16 | reg_2870;
		else
			reg_2870 = ((reg_2870 & ~1) << 15) | (reg_2870 & ~1);
	}

	if (f->dst_w < f->src_w)
		reg_2870 = 0x000d000e - reg_2870;
	else
		reg_2870 = 0x0012000e - reg_2870;

	/* We're also using 2870 to shift the image left (src_x & negative dst_x) */
	reg_2870_offset = (f->src_x * ((f->dst_w << 21) / f->src_w)) >> 19;

	if (f->dst_w >= f->src_w) {
		x_cutoff &= ~1;
		master_width = (f->src_w * 0x00200000) / (f->dst_w);
		if (master_width * f->dst_w != f->src_w * 0x00200000)
			master_width++;
		reg_2834 = (reg_2834 << 16) | x_cutoff;
		reg_2838 = (reg_2838 << 16) | x_cutoff;
		reg_283c = master_width >> 2;
		reg_2844 = master_width >> 2;
		reg_2854 = master_width;
		reg_285c = master_width >> 1;
		reg_2864 = master_width >> 1;

		/* We also need to factor in the scaling
		   (src_w - dst_w) / (src_w / 4) */
		if (f->dst_w > f->src_w)
			reg_2870_base = ((f->dst_w - f->src_w)<<16) / (f->src_w <<14);
		else
			reg_2870_base = 0;

		reg_2870 += (((reg_2870_offset << 14) & 0xFFFF0000) | reg_2870_offset >> 2) + (reg_2870_base << 17 | reg_2870_base);
		reg_2874 = 0;
	} else if (f->dst_w < f->src_w / 2) {
		master_width = (f->src_w * 0x00080000) / f->dst_w;
		if (master_width * f->dst_w != f->src_w * 0x00080000)
			master_width++;
		reg_2834 = (reg_2834 << 16) | x_cutoff;
		reg_2838 = (reg_2838 << 16) | x_cutoff;
		reg_283c = master_width >> 2;
		reg_2844 = master_width >> 1;
		reg_2854 = master_width;
		reg_285c = master_width >> 1;
		reg_2864 = master_width >> 1;
		reg_2870 += ((reg_2870_offset << 15) & 0xFFFF0000) | reg_2870_offset;
		reg_2870 += (5 - (((f->src_w + f->src_w / 2) - 1) / f->dst_w)) << 16;
		reg_2874 = 0x00000012;
	} else {
		master_width = (f->src_w * 0x00100000) / f->dst_w;
		if (master_width * f->dst_w != f->src_w * 0x00100000)
			master_width++;
		reg_2834 = (reg_2834 << 16) | x_cutoff;
		reg_2838 = (reg_2838 << 16) | x_cutoff;
		reg_283c = master_width >> 2;
		reg_2844 = master_width >> 1;
		reg_2854 = master_width;
		reg_285c = master_width >> 1;
		reg_2864 = master_width >> 1;
		reg_2870 += ((reg_2870_offset << 14) & 0xFFFF0000) | reg_2870_offset >> 1;
		reg_2870 += (5 - (((f->src_w * 3) - 1) / f->dst_w)) << 16;
		reg_2874 = 0x00000001;
	}

	/* Select the horizontal filter */
	if (f->src_w == f->dst_w) {
		/* An exact size match uses filter 0 */
		h_filter = 0;
	} else {
		/* Figure out which filter to use */
		h_filter = ((f->src_w << 16) / f->dst_w) >> 15;
		h_filter = (h_filter >> 1) + (h_filter & 1);
		/* Only an exact size match can use filter 0 */
		h_filter += !h_filter;
	}

	write_reg(reg_2834, 0x02834);
	write_reg(reg_2838, 0x02838);
	IVTV_DEBUG_YUV("Update reg 0x2834 %08x->%08x 0x2838 %08x->%08x\n",
		       yi->reg_2834, reg_2834, yi->reg_2838, reg_2838);

	write_reg(reg_283c, 0x0283c);
	write_reg(reg_2844, 0x02844);

	IVTV_DEBUG_YUV("Update reg 0x283c %08x->%08x 0x2844 %08x->%08x\n",
		       yi->reg_283c, reg_283c, yi->reg_2844, reg_2844);

	write_reg(0x00080514, 0x02840);
	write_reg(0x00100514, 0x02848);
	IVTV_DEBUG_YUV("Update reg 0x2840 %08x->%08x 0x2848 %08x->%08x\n",
		       yi->reg_2840, 0x00080514, yi->reg_2848, 0x00100514);

	write_reg(reg_2854, 0x02854);
	IVTV_DEBUG_YUV("Update reg 0x2854 %08x->%08x \n",
		       yi->reg_2854, reg_2854);

	write_reg(reg_285c, 0x0285c);
	write_reg(reg_2864, 0x02864);
	IVTV_DEBUG_YUV("Update reg 0x285c %08x->%08x 0x2864 %08x->%08x\n",
		       yi->reg_285c, reg_285c, yi->reg_2864, reg_2864);

	write_reg(reg_2874, 0x02874);
	IVTV_DEBUG_YUV("Update reg 0x2874 %08x->%08x\n",
		       yi->reg_2874, reg_2874);

	write_reg(reg_2870, 0x02870);
	IVTV_DEBUG_YUV("Update reg 0x2870 %08x->%08x\n",
		       yi->reg_2870, reg_2870);

	write_reg(reg_2890, 0x02890);
	IVTV_DEBUG_YUV("Update reg 0x2890 %08x->%08x\n",
		       yi->reg_2890, reg_2890);

	/* Only update the filter if we really need to */
	if (h_filter != yi->h_filter) {
		ivtv_yuv_filter(itv, h_filter, -1, -1);
		yi->h_filter = h_filter;
	}
}

static void ivtv_yuv_handle_vertical(struct ivtv *itv, struct yuv_frame_info *f)
{
	struct yuv_playback_info *yi = &itv->yuv_info;
	u32 master_height;
	u32 reg_2918, reg_291c, reg_2920, reg_2928;
	u32 reg_2930, reg_2934, reg_293c;
	u32 reg_2940, reg_2944, reg_294c;
	u32 reg_2950, reg_2954, reg_2958, reg_295c;
	u32 reg_2960, reg_2964, reg_2968, reg_296c;
	u32 reg_289c;
	u32 src_major_y, src_minor_y;
	u32 src_major_uv, src_minor_uv;
	u32 reg_2964_base, reg_2968_base;
	int v_filter_1, v_filter_2;

	IVTV_DEBUG_WARN
	    ("Adjust to height %d src_h %d dst_h %d src_y %d dst_y %d\n",
	     f->tru_h, f->src_h, f->dst_h, f->src_y, f->dst_y);

	/* What scaling mode is being used... */
	IVTV_DEBUG_YUV("Scaling mode Y: %s\n",
		       f->interlaced_y ? "Interlaced" : "Progressive");

	IVTV_DEBUG_YUV("Scaling mode UV: %s\n",
		       f->interlaced_uv ? "Interlaced" : "Progressive");

	/* What is the source video being treated as... */
	IVTV_DEBUG_WARN("Source video: %s\n",
			f->interlaced ? "Interlaced" : "Progressive");

	/* We offset into the image using two different index methods, so split
	   the y source coord into two parts. */
	if (f->src_y < 8) {
		src_minor_uv = f->src_y;
		src_major_uv = 0;
	} else {
		src_minor_uv = 8;
		src_major_uv = f->src_y - 8;
	}

	src_minor_y = src_minor_uv;
	src_major_y = src_major_uv;

	if (f->offset_y)
		src_minor_y += 16;

	if (f->interlaced_y)
		reg_2918 = (f->dst_h << 16) | (f->src_h + src_minor_y);
	else
		reg_2918 = (f->dst_h << 16) | ((f->src_h + src_minor_y) << 1);

	if (f->interlaced_uv)
		reg_291c = (f->dst_h << 16) | ((f->src_h + src_minor_uv) >> 1);
	else
		reg_291c = (f->dst_h << 16) | (f->src_h + src_minor_uv);

	reg_2964_base = (src_minor_y * ((f->dst_h << 16) / f->src_h)) >> 14;
	reg_2968_base = (src_minor_uv * ((f->dst_h << 16) / f->src_h)) >> 14;

	if (f->dst_h / 2 >= f->src_h && !f->interlaced_y) {
		master_height = (f->src_h * 0x00400000) / f->dst_h;
		if ((f->src_h * 0x00400000) - (master_height * f->dst_h) >= f->dst_h / 2)
			master_height++;
		reg_2920 = master_height >> 2;
		reg_2928 = master_height >> 3;
		reg_2930 = master_height;
		reg_2940 = master_height >> 1;
		reg_2964_base >>= 3;
		reg_2968_base >>= 3;
		reg_296c = 0x00000000;
	} else if (f->dst_h >= f->src_h) {
		master_height = (f->src_h * 0x00400000) / f->dst_h;
		master_height = (master_height >> 1) + (master_height & 1);
		reg_2920 = master_height >> 2;
		reg_2928 = master_height >> 2;
		reg_2930 = master_height;
		reg_2940 = master_height >> 1;
		reg_296c = 0x00000000;
		if (f->interlaced_y) {
			reg_2964_base >>= 3;
		} else {
			reg_296c++;
			reg_2964_base >>= 2;
		}
		if (f->interlaced_uv)
			reg_2928 >>= 1;
		reg_2968_base >>= 3;
	} else if (f->dst_h >= f->src_h / 2) {
		master_height = (f->src_h * 0x00200000) / f->dst_h;
		master_height = (master_height >> 1) + (master_height & 1);
		reg_2920 = master_height >> 2;
		reg_2928 = master_height >> 2;
		reg_2930 = master_height;
		reg_2940 = master_height;
		reg_296c = 0x00000101;
		if (f->interlaced_y) {
			reg_2964_base >>= 2;
		} else {
			reg_296c++;
			reg_2964_base >>= 1;
		}
		if (f->interlaced_uv)
			reg_2928 >>= 1;
		reg_2968_base >>= 2;
	} else {
		master_height = (f->src_h * 0x00100000) / f->dst_h;
		master_height = (master_height >> 1) + (master_height & 1);
		reg_2920 = master_height >> 2;
		reg_2928 = master_height >> 2;
		reg_2930 = master_height;
		reg_2940 = master_height;
		reg_2964_base >>= 1;
		reg_2968_base >>= 2;
		reg_296c = 0x00000102;
	}

	/* FIXME These registers change depending on scaled / unscaled output
	   We really need to work out what they should be */
	if (f->src_h == f->dst_h) {
		reg_2934 = 0x00020000;
		reg_293c = 0x00100000;
		reg_2944 = 0x00040000;
		reg_294c = 0x000b0000;
	} else {
		reg_2934 = 0x00000FF0;
		reg_293c = 0x00000FF0;
		reg_2944 = 0x00000FF0;
		reg_294c = 0x00000FF0;
	}

	/* The first line to be displayed */
	reg_2950 = 0x00010000 + src_major_y;
	if (f->interlaced_y)
		reg_2950 += 0x00010000;
	reg_2954 = reg_2950 + 1;

	reg_2958 = 0x00010000 + (src_major_y >> 1);
	if (f->interlaced_uv)
		reg_2958 += 0x00010000;
	reg_295c = reg_2958 + 1;

	if (yi->decode_height == 480)
		reg_289c = 0x011e0017;
	else
		reg_289c = 0x01500017;

	if (f->dst_y < 0)
		reg_289c = (reg_289c - ((f->dst_y & ~1)<<15))-(f->dst_y >>1);
	else
		reg_289c = (reg_289c + ((f->dst_y & ~1)<<15))+(f->dst_y >>1);

	/* How much of the source to decode.
	   Take into account the source offset */
	reg_2960 = ((src_minor_y + f->src_h + src_major_y) - 1) |
		(((src_minor_uv + f->src_h + src_major_uv - 1) & ~1) << 15);

	/* Calculate correct value for register 2964 */
	if (f->src_h == f->dst_h) {
		reg_2964 = 1;
	} else {
		reg_2964 = 2 + ((f->dst_h << 1) / f->src_h);
		reg_2964 = (reg_2964 >> 1) + (reg_2964 & 1);
	}
	reg_2968 = (reg_2964 << 16) + reg_2964 + (reg_2964 >> 1);
	reg_2964 = (reg_2964 << 16) + reg_2964 + (reg_2964 * 46 / 94);

	/* Okay, we've wasted time working out the correct value,
	   but if we use it, it fouls the the window alignment.
	   Fudge it to what we want... */
	reg_2964 = 0x00010001 + ((reg_2964 & 0x0000FFFF) - (reg_2964 >> 16));
	reg_2968 = 0x00010001 + ((reg_2968 & 0x0000FFFF) - (reg_2968 >> 16));

	/* Deviate further from what it should be. I find the flicker headache
	   inducing so try to reduce it slightly. Leave 2968 as-is otherwise
	   colours foul. */
	if ((reg_2964 != 0x00010001) && (f->dst_h / 2 <= f->src_h))
		reg_2964 = (reg_2964 & 0xFFFF0000) + ((reg_2964 & 0x0000FFFF) / 2);

	if (!f->interlaced_y)
		reg_2964 -= 0x00010001;
	if (!f->interlaced_uv)
		reg_2968 -= 0x00010001;

	reg_2964 += ((reg_2964_base << 16) | reg_2964_base);
	reg_2968 += ((reg_2968_base << 16) | reg_2968_base);

	/* Select the vertical filter */
	if (f->src_h == f->dst_h) {
		/* An exact size match uses filter 0/1 */
		v_filter_1 = 0;
		v_filter_2 = 1;
	} else {
		/* Figure out which filter to use */
		v_filter_1 = ((f->src_h << 16) / f->dst_h) >> 15;
		v_filter_1 = (v_filter_1 >> 1) + (v_filter_1 & 1);
		/* Only an exact size match can use filter 0 */
		v_filter_1 += !v_filter_1;
		v_filter_2 = v_filter_1;
	}

	write_reg(reg_2934, 0x02934);
	write_reg(reg_293c, 0x0293c);
	IVTV_DEBUG_YUV("Update reg 0x2934 %08x->%08x 0x293c %08x->%08x\n",
		       yi->reg_2934, reg_2934, yi->reg_293c, reg_293c);
	write_reg(reg_2944, 0x02944);
	write_reg(reg_294c, 0x0294c);
	IVTV_DEBUG_YUV("Update reg 0x2944 %08x->%08x 0x294c %08x->%08x\n",
		       yi->reg_2944, reg_2944, yi->reg_294c, reg_294c);

	/* Ensure 2970 is 0 (does it ever change ?) */
/*	write_reg(0,0x02970); */
/*	IVTV_DEBUG_YUV("Update reg 0x2970 %08x->%08x\n", yi->reg_2970, 0); */

	write_reg(reg_2930, 0x02938);
	write_reg(reg_2930, 0x02930);
	IVTV_DEBUG_YUV("Update reg 0x2930 %08x->%08x 0x2938 %08x->%08x\n",
		       yi->reg_2930, reg_2930, yi->reg_2938, reg_2930);

	write_reg(reg_2928, 0x02928);
	write_reg(reg_2928 + 0x514, 0x0292C);
	IVTV_DEBUG_YUV("Update reg 0x2928 %08x->%08x 0x292c %08x->%08x\n",
		       yi->reg_2928, reg_2928, yi->reg_292c, reg_2928 + 0x514);

	write_reg(reg_2920, 0x02920);
	write_reg(reg_2920 + 0x514, 0x02924);
	IVTV_DEBUG_YUV("Update reg 0x2920 %08x->%08x 0x2924 %08x->%08x\n",
		       yi->reg_2920, reg_2920, yi->reg_2924, reg_2920 + 0x514);

	write_reg(reg_2918, 0x02918);
	write_reg(reg_291c, 0x0291C);
	IVTV_DEBUG_YUV("Update reg 0x2918 %08x->%08x 0x291C %08x->%08x\n",
		       yi->reg_2918, reg_2918, yi->reg_291c, reg_291c);

	write_reg(reg_296c, 0x0296c);
	IVTV_DEBUG_YUV("Update reg 0x296c %08x->%08x\n",
		       yi->reg_296c, reg_296c);

	write_reg(reg_2940, 0x02948);
	write_reg(reg_2940, 0x02940);
	IVTV_DEBUG_YUV("Update reg 0x2940 %08x->%08x 0x2948 %08x->%08x\n",
		       yi->reg_2940, reg_2940, yi->reg_2948, reg_2940);

	write_reg(reg_2950, 0x02950);
	write_reg(reg_2954, 0x02954);
	IVTV_DEBUG_YUV("Update reg 0x2950 %08x->%08x 0x2954 %08x->%08x\n",
		       yi->reg_2950, reg_2950, yi->reg_2954, reg_2954);

	write_reg(reg_2958, 0x02958);
	write_reg(reg_295c, 0x0295C);
	IVTV_DEBUG_YUV("Update reg 0x2958 %08x->%08x 0x295C %08x->%08x\n",
		       yi->reg_2958, reg_2958, yi->reg_295c, reg_295c);

	write_reg(reg_2960, 0x02960);
	IVTV_DEBUG_YUV("Update reg 0x2960 %08x->%08x \n",
		       yi->reg_2960, reg_2960);

	write_reg(reg_2964, 0x02964);
	write_reg(reg_2968, 0x02968);
	IVTV_DEBUG_YUV("Update reg 0x2964 %08x->%08x 0x2968 %08x->%08x\n",
		       yi->reg_2964, reg_2964, yi->reg_2968, reg_2968);

	write_reg(reg_289c, 0x0289c);
	IVTV_DEBUG_YUV("Update reg 0x289c %08x->%08x\n",
		       yi->reg_289c, reg_289c);

	/* Only update filter 1 if we really need to */
	if (v_filter_1 != yi->v_filter_1) {
		ivtv_yuv_filter(itv, -1, v_filter_1, -1);
		yi->v_filter_1 = v_filter_1;
	}

	/* Only update filter 2 if we really need to */
	if (v_filter_2 != yi->v_filter_2) {
		ivtv_yuv_filter(itv, -1, -1, v_filter_2);
		yi->v_filter_2 = v_filter_2;
	}
}

/* Modify the supplied coordinate information to fit the visible osd area */
static u32 ivtv_yuv_window_setup(struct ivtv *itv, struct yuv_frame_info *f)
{
	struct yuv_frame_info *of = &itv->yuv_info.old_frame_info;
	int osd_crop;
	u32 osd_scale;
	u32 yuv_update = 0;

	/* Sorry, but no negative coords for src */
	if (f->src_x < 0)
		f->src_x = 0;
	if (f->src_y < 0)
		f->src_y = 0;

	/* Can only reduce width down to 1/4 original size */
	if ((osd_crop = f->src_w - 4 * f->dst_w) > 0) {
		f->src_x += osd_crop / 2;
		f->src_w = (f->src_w - osd_crop) & ~3;
		f->dst_w = f->src_w / 4;
		f->dst_w += f->dst_w & 1;
	}

	/* Can only reduce height down to 1/4 original size */
	if (f->src_h / f->dst_h >= 2) {
		/* Overflow may be because we're running progressive,
		   so force mode switch */
		f->interlaced_y = 1;
		/* Make sure we're still within limits for interlace */
		if ((osd_crop = f->src_h - 4 * f->dst_h) > 0) {
			/* If we reach here we'll have to force the height. */
			f->src_y += osd_crop / 2;
			f->src_h = (f->src_h - osd_crop) & ~3;
			f->dst_h = f->src_h / 4;
			f->dst_h += f->dst_h & 1;
		}
	}

	/* If there's nothing to safe to display, we may as well stop now */
	if ((int)f->dst_w <= 2 || (int)f->dst_h <= 2 ||
	    (int)f->src_w <= 2 || (int)f->src_h <= 2) {
		return IVTV_YUV_UPDATE_INVALID;
	}

	/* Ensure video remains inside OSD area */
	osd_scale = (f->src_h << 16) / f->dst_h;

	if ((osd_crop = f->pan_y - f->dst_y) > 0) {
		/* Falls off the upper edge - crop */
		f->src_y += (osd_scale * osd_crop) >> 16;
		f->src_h -= (osd_scale * osd_crop) >> 16;
		f->dst_h -= osd_crop;
		f->dst_y = 0;
	} else {
		f->dst_y -= f->pan_y;
	}

	if ((osd_crop = f->dst_h + f->dst_y - f->vis_h) > 0) {
		/* Falls off the lower edge - crop */
		f->dst_h -= osd_crop;
		f->src_h -= (osd_scale * osd_crop) >> 16;
	}

	osd_scale = (f->src_w << 16) / f->dst_w;

	if ((osd_crop = f->pan_x - f->dst_x) > 0) {
		/* Fall off the left edge - crop */
		f->src_x += (osd_scale * osd_crop) >> 16;
		f->src_w -= (osd_scale * osd_crop) >> 16;
		f->dst_w -= osd_crop;
		f->dst_x = 0;
	} else {
		f->dst_x -= f->pan_x;
	}

	if ((osd_crop = f->dst_w + f->dst_x - f->vis_w) > 0) {
		/* Falls off the right edge - crop */
		f->dst_w -= osd_crop;
		f->src_w -= (osd_scale * osd_crop) >> 16;
	}

	if (itv->yuv_info.track_osd) {
		/* The OSD can be moved. Track to it */
		f->dst_x += itv->yuv_info.osd_x_offset;
		f->dst_y += itv->yuv_info.osd_y_offset;
	}

	/* Width & height for both src & dst must be even.
	   Same for coordinates. */
	f->dst_w &= ~1;
	f->dst_x &= ~1;

	f->src_w += f->src_x & 1;
	f->src_x &= ~1;

	f->src_w &= ~1;
	f->dst_w &= ~1;

	f->dst_h &= ~1;
	f->dst_y &= ~1;

	f->src_h += f->src_y & 1;
	f->src_y &= ~1;

	f->src_h &= ~1;
	f->dst_h &= ~1;

	/* Due to rounding, we may have reduced the output size to <1/4 of
	   the source. Check again, but this time just resize. Don't change
	   source coordinates */
	if (f->dst_w < f->src_w / 4) {
		f->src_w &= ~3;
		f->dst_w = f->src_w / 4;
		f->dst_w += f->dst_w & 1;
	}
	if (f->dst_h < f->src_h / 4) {
		f->src_h &= ~3;
		f->dst_h = f->src_h / 4;
		f->dst_h += f->dst_h & 1;
	}

	/* Check again. If there's nothing to safe to display, stop now */
	if ((int)f->dst_w <= 2 || (int)f->dst_h <= 2 ||
	    (int)f->src_w <= 2 || (int)f->src_h <= 2) {
		return IVTV_YUV_UPDATE_INVALID;
	}

	/* Both x offset & width are linked, so they have to be done together */
	if ((of->dst_w != f->dst_w) || (of->src_w != f->src_w) ||
	    (of->dst_x != f->dst_x) || (of->src_x != f->src_x) ||
	    (of->pan_x != f->pan_x) || (of->vis_w != f->vis_w)) {
		yuv_update |= IVTV_YUV_UPDATE_HORIZONTAL;
	}

	if ((of->src_h != f->src_h) || (of->dst_h != f->dst_h) ||
	    (of->dst_y != f->dst_y) || (of->src_y != f->src_y) ||
	    (of->pan_y != f->pan_y) || (of->vis_h != f->vis_h) ||
	    (of->lace_mode != f->lace_mode) ||
	    (of->interlaced_y != f->interlaced_y) ||
	    (of->interlaced_uv != f->interlaced_uv)) {
		yuv_update |= IVTV_YUV_UPDATE_VERTICAL;
	}

	return yuv_update;
}

/* Update the scaling register to the requested value */
void ivtv_yuv_work_handler(struct ivtv *itv)
{
	struct yuv_playback_info *yi = &itv->yuv_info;
	struct yuv_frame_info f;
	int frame = yi->update_frame;
	u32 yuv_update;

	IVTV_DEBUG_YUV("Update yuv registers for frame %d\n", frame);
	f = yi->new_frame_info[frame];

	if (yi->track_osd) {
		/* Snapshot the osd pan info */
		f.pan_x = yi->osd_x_pan;
		f.pan_y = yi->osd_y_pan;
		f.vis_w = yi->osd_vis_w;
		f.vis_h = yi->osd_vis_h;
	} else {
		/* Not tracking the osd, so assume full screen */
		f.pan_x = 0;
		f.pan_y = 0;
		f.vis_w = 720;
		f.vis_h = yi->decode_height;
	}

	/* Calculate the display window coordinates. Exit if nothing left */
	if (!(yuv_update = ivtv_yuv_window_setup(itv, &f)))
		return;

	if (yuv_update & IVTV_YUV_UPDATE_INVALID) {
		write_reg(0x01008080, 0x2898);
	} else if (yuv_update) {
		write_reg(0x00108080, 0x2898);

		if (yuv_update & IVTV_YUV_UPDATE_HORIZONTAL)
			ivtv_yuv_handle_horizontal(itv, &f);

		if (yuv_update & IVTV_YUV_UPDATE_VERTICAL)
			ivtv_yuv_handle_vertical(itv, &f);
	}
	yi->old_frame_info = f;
}

static void ivtv_yuv_init(struct ivtv *itv)
{
	struct yuv_playback_info *yi = &itv->yuv_info;

	IVTV_DEBUG_YUV("ivtv_yuv_init\n");

	/* Take a snapshot of the current register settings */
	yi->reg_2834 = read_reg(0x02834);
	yi->reg_2838 = read_reg(0x02838);
	yi->reg_283c = read_reg(0x0283c);
	yi->reg_2840 = read_reg(0x02840);
	yi->reg_2844 = read_reg(0x02844);
	yi->reg_2848 = read_reg(0x02848);
	yi->reg_2854 = read_reg(0x02854);
	yi->reg_285c = read_reg(0x0285c);
	yi->reg_2864 = read_reg(0x02864);
	yi->reg_2870 = read_reg(0x02870);
	yi->reg_2874 = read_reg(0x02874);
	yi->reg_2898 = read_reg(0x02898);
	yi->reg_2890 = read_reg(0x02890);

	yi->reg_289c = read_reg(0x0289c);
	yi->reg_2918 = read_reg(0x02918);
	yi->reg_291c = read_reg(0x0291c);
	yi->reg_2920 = read_reg(0x02920);
	yi->reg_2924 = read_reg(0x02924);
	yi->reg_2928 = read_reg(0x02928);
	yi->reg_292c = read_reg(0x0292c);
	yi->reg_2930 = read_reg(0x02930);
	yi->reg_2934 = read_reg(0x02934);
	yi->reg_2938 = read_reg(0x02938);
	yi->reg_293c = read_reg(0x0293c);
	yi->reg_2940 = read_reg(0x02940);
	yi->reg_2944 = read_reg(0x02944);
	yi->reg_2948 = read_reg(0x02948);
	yi->reg_294c = read_reg(0x0294c);
	yi->reg_2950 = read_reg(0x02950);
	yi->reg_2954 = read_reg(0x02954);
	yi->reg_2958 = read_reg(0x02958);
	yi->reg_295c = read_reg(0x0295c);
	yi->reg_2960 = read_reg(0x02960);
	yi->reg_2964 = read_reg(0x02964);
	yi->reg_2968 = read_reg(0x02968);
	yi->reg_296c = read_reg(0x0296c);
	yi->reg_2970 = read_reg(0x02970);

	yi->v_filter_1 = -1;
	yi->v_filter_2 = -1;
	yi->h_filter = -1;

	/* Set some valid size info */
	yi->osd_x_offset = read_reg(0x02a04) & 0x00000FFF;
	yi->osd_y_offset = (read_reg(0x02a04) >> 16) & 0x00000FFF;

	/* Bit 2 of reg 2878 indicates current decoder output format
	   0 : NTSC    1 : PAL */
	if (read_reg(0x2878) & 4)
		yi->decode_height = 576;
	else
		yi->decode_height = 480;

	if (!itv->osd_info) {
		yi->osd_vis_w = 720 - yi->osd_x_offset;
		yi->osd_vis_h = yi->decode_height - yi->osd_y_offset;
	} else {
		/* If no visible size set, assume full size */
		if (!yi->osd_vis_w)
			yi->osd_vis_w = 720 - yi->osd_x_offset;

		if (!yi->osd_vis_h) {
			yi->osd_vis_h = yi->decode_height - yi->osd_y_offset;
		} else if (yi->osd_vis_h + yi->osd_y_offset > yi->decode_height) {
			/* If output video standard has changed, requested height may
			   not be legal */
			IVTV_DEBUG_WARN("Clipping yuv output - fb size (%d) exceeds video standard limit (%d)\n",
					yi->osd_vis_h + yi->osd_y_offset,
					yi->decode_height);
			yi->osd_vis_h = yi->decode_height - yi->osd_y_offset;
		}
	}

	/* We need a buffer for blanking when Y plane is offset - non-fatal if we can't get one */
	yi->blanking_ptr = kzalloc(720 * 16, GFP_KERNEL|__GFP_NOWARN);
	if (yi->blanking_ptr) {
		yi->blanking_dmaptr = pci_map_single(itv->dev, yi->blanking_ptr, 720*16, PCI_DMA_TODEVICE);
	} else {
		yi->blanking_dmaptr = 0;
		IVTV_DEBUG_WARN("Failed to allocate yuv blanking buffer\n");
	}

	/* Enable YUV decoder output */
	write_reg_sync(0x01, IVTV_REG_VDM);

	set_bit(IVTV_F_I_DECODING_YUV, &itv->i_flags);
	atomic_set(&yi->next_dma_frame, 0);
}

/* Get next available yuv buffer on PVR350 */
static void ivtv_yuv_next_free(struct ivtv *itv)
{
	int draw, display;
	struct yuv_playback_info *yi = &itv->yuv_info;

	if (atomic_read(&yi->next_dma_frame) == -1)
		ivtv_yuv_init(itv);

	draw = atomic_read(&yi->next_fill_frame);
	display = atomic_read(&yi->next_dma_frame);

	if (display > draw)
		display -= IVTV_YUV_BUFFERS;

	if (draw - display >= yi->max_frames_buffered)
		draw = (u8)(draw - 1) % IVTV_YUV_BUFFERS;
	else
		yi->new_frame_info[draw].update = 0;

	yi->draw_frame = draw;
}

/* Set up frame according to ivtv_dma_frame parameters */
static void ivtv_yuv_setup_frame(struct ivtv *itv, struct ivtv_dma_frame *args)
{
	struct yuv_playback_info *yi = &itv->yuv_info;
	u8 frame = yi->draw_frame;
	u8 last_frame = (u8)(frame - 1) % IVTV_YUV_BUFFERS;
	struct yuv_frame_info *nf = &yi->new_frame_info[frame];
	struct yuv_frame_info *of = &yi->new_frame_info[last_frame];
	int lace_threshold = yi->lace_threshold;

	/* Preserve old update flag in case we're overwriting a queued frame */
	int update = nf->update;

	/* Take a snapshot of the yuv coordinate information */
	nf->src_x = args->src.left;
	nf->src_y = args->src.top;
	nf->src_w = args->src.width;
	nf->src_h = args->src.height;
	nf->dst_x = args->dst.left;
	nf->dst_y = args->dst.top;
	nf->dst_w = args->dst.width;
	nf->dst_h = args->dst.height;
	nf->tru_x = args->dst.left;
	nf->tru_w = args->src_width;
	nf->tru_h = args->src_height;

	/* Are we going to offset the Y plane */
	nf->offset_y = (nf->tru_h + nf->src_x < 512 - 16) ? 1 : 0;

	nf->update = 0;
	nf->interlaced_y = 0;
	nf->interlaced_uv = 0;
	nf->delay = 0;
	nf->sync_field = 0;
	nf->lace_mode = yi->lace_mode & IVTV_YUV_MODE_MASK;

	if (lace_threshold < 0)
		lace_threshold = yi->decode_height - 1;

	/* Work out the lace settings */
	switch (nf->lace_mode) {
	case IVTV_YUV_MODE_PROGRESSIVE: /* Progressive mode */
		nf->interlaced = 0;
		if (nf->tru_h < 512 || (nf->tru_h > 576 && nf->tru_h < 1021))
			nf->interlaced_y = 0;
		else
			nf->interlaced_y = 1;

		if (nf->tru_h < 1021 && (nf->dst_h >= nf->src_h / 2))
			nf->interlaced_uv = 0;
		else
			nf->interlaced_uv = 1;
		break;

	case IVTV_YUV_MODE_AUTO:
		if (nf->tru_h <= lace_threshold || nf->tru_h > 576 || nf->tru_w > 720) {
			nf->interlaced = 0;
			if ((nf->tru_h < 512) ||
			    (nf->tru_h > 576 && nf->tru_h < 1021) ||
			    (nf->tru_w > 720 && nf->tru_h < 1021))
				nf->interlaced_y = 0;
			else
				nf->interlaced_y = 1;
			if (nf->tru_h < 1021 && (nf->dst_h >= nf->src_h / 2))
				nf->interlaced_uv = 0;
			else
				nf->interlaced_uv = 1;
		} else {
			nf->interlaced = 1;
			nf->interlaced_y = 1;
			nf->interlaced_uv = 1;
		}
		break;

	case IVTV_YUV_MODE_INTERLACED: /* Interlace mode */
	default:
		nf->interlaced = 1;
		nf->interlaced_y = 1;
		nf->interlaced_uv = 1;
		break;
	}

	if (memcmp(&yi->old_frame_info_args, nf, sizeof(*nf))) {
		yi->old_frame_info_args = *nf;
		nf->update = 1;
		IVTV_DEBUG_YUV("Requesting reg update for frame %d\n", frame);
	}

	nf->update |= update;
	nf->sync_field = yi->lace_sync_field;
	nf->delay = nf->sync_field != of->sync_field;
}

/* Frame is complete & ready for display */
void ivtv_yuv_frame_complete(struct ivtv *itv)
{
	atomic_set(&itv->yuv_info.next_fill_frame,
			(itv->yuv_info.draw_frame + 1) % IVTV_YUV_BUFFERS);
}

static int ivtv_yuv_udma_frame(struct ivtv *itv, struct ivtv_dma_frame *args)
{
	DEFINE_WAIT(wait);
	int rc = 0;
	int got_sig = 0;
	/* DMA the frame */
	mutex_lock(&itv->udma.lock);

	if ((rc = ivtv_yuv_prep_user_dma(itv, &itv->udma, args)) != 0) {
		mutex_unlock(&itv->udma.lock);
		return rc;
	}

	ivtv_udma_prepare(itv);
	prepare_to_wait(&itv->dma_waitq, &wait, TASK_INTERRUPTIBLE);
	/* if no UDMA is pending and no UDMA is in progress, then the DMA
	   is finished */
	while (itv->i_flags & (IVTV_F_I_UDMA_PENDING | IVTV_F_I_UDMA)) {
		/* don't interrupt if the DMA is in progress but break off
		   a still pending DMA. */
		got_sig = signal_pending(current);
		if (got_sig && test_and_clear_bit(IVTV_F_I_UDMA_PENDING, &itv->i_flags))
			break;
		got_sig = 0;
		schedule();
	}
	finish_wait(&itv->dma_waitq, &wait);

	/* Unmap Last DMA Xfer */
	ivtv_udma_unmap(itv);

	if (got_sig) {
		IVTV_DEBUG_INFO("User stopped YUV UDMA\n");
		mutex_unlock(&itv->udma.lock);
		return -EINTR;
	}

	ivtv_yuv_frame_complete(itv);

	mutex_unlock(&itv->udma.lock);
	return rc;
}

/* Setup frame according to V4L2 parameters */
void ivtv_yuv_setup_stream_frame(struct ivtv *itv)
{
	struct yuv_playback_info *yi = &itv->yuv_info;
	struct ivtv_dma_frame dma_args;

	ivtv_yuv_next_free(itv);

	/* Copy V4L2 parameters to an ivtv_dma_frame struct... */
	dma_args.y_source = NULL;
	dma_args.uv_source = NULL;
	dma_args.src.left = 0;
	dma_args.src.top = 0;
	dma_args.src.width = yi->v4l2_src_w;
	dma_args.src.height = yi->v4l2_src_h;
	dma_args.dst = yi->main_rect;
	dma_args.src_width = yi->v4l2_src_w;
	dma_args.src_height = yi->v4l2_src_h;

	/* ... and use the same setup routine as ivtv_yuv_prep_frame */
	ivtv_yuv_setup_frame(itv, &dma_args);

	if (!itv->dma_data_req_offset)
		itv->dma_data_req_offset = yuv_offset[yi->draw_frame];
}

/* Attempt to dma a frame from a user buffer */
int ivtv_yuv_udma_stream_frame(struct ivtv *itv, void __user *src)
{
	struct yuv_playback_info *yi = &itv->yuv_info;
	struct ivtv_dma_frame dma_args;

	ivtv_yuv_setup_stream_frame(itv);

	/* We only need to supply source addresses for this */
	dma_args.y_source = src;
	dma_args.uv_source = src + 720 * ((yi->v4l2_src_h + 31) & ~31);
	return ivtv_yuv_udma_frame(itv, &dma_args);
}

/* IVTV_IOC_DMA_FRAME ioctl handler */
int ivtv_yuv_prep_frame(struct ivtv *itv, struct ivtv_dma_frame *args)
{
/*	IVTV_DEBUG_INFO("yuv_prep_frame\n"); */

	ivtv_yuv_next_free(itv);
	ivtv_yuv_setup_frame(itv, args);
	return ivtv_yuv_udma_frame(itv, args);
}

void ivtv_yuv_close(struct ivtv *itv)
{
	struct yuv_playback_info *yi = &itv->yuv_info;
	int h_filter, v_filter_1, v_filter_2;

	IVTV_DEBUG_YUV("ivtv_yuv_close\n");
	ivtv_waitq(&itv->vsync_waitq);

	atomic_set(&yi->next_dma_frame, -1);
	atomic_set(&yi->next_fill_frame, 0);

	/* Reset registers we have changed so mpeg playback works */

	/* If we fully restore this register, the display may remain active.
	   Restore, but set one bit to blank the video. Firmware will always
	   clear this bit when needed, so not a problem. */
	write_reg(yi->reg_2898 | 0x01000000, 0x2898);

	write_reg(yi->reg_2834, 0x02834);
	write_reg(yi->reg_2838, 0x02838);
	write_reg(yi->reg_283c, 0x0283c);
	write_reg(yi->reg_2840, 0x02840);
	write_reg(yi->reg_2844, 0x02844);
	write_reg(yi->reg_2848, 0x02848);
	write_reg(yi->reg_2854, 0x02854);
	write_reg(yi->reg_285c, 0x0285c);
	write_reg(yi->reg_2864, 0x02864);
	write_reg(yi->reg_2870, 0x02870);
	write_reg(yi->reg_2874, 0x02874);
	write_reg(yi->reg_2890, 0x02890);
	write_reg(yi->reg_289c, 0x0289c);

	write_reg(yi->reg_2918, 0x02918);
	write_reg(yi->reg_291c, 0x0291c);
	write_reg(yi->reg_2920, 0x02920);
	write_reg(yi->reg_2924, 0x02924);
	write_reg(yi->reg_2928, 0x02928);
	write_reg(yi->reg_292c, 0x0292c);
	write_reg(yi->reg_2930, 0x02930);
	write_reg(yi->reg_2934, 0x02934);
	write_reg(yi->reg_2938, 0x02938);
	write_reg(yi->reg_293c, 0x0293c);
	write_reg(yi->reg_2940, 0x02940);
	write_reg(yi->reg_2944, 0x02944);
	write_reg(yi->reg_2948, 0x02948);
	write_reg(yi->reg_294c, 0x0294c);
	write_reg(yi->reg_2950, 0x02950);
	write_reg(yi->reg_2954, 0x02954);
	write_reg(yi->reg_2958, 0x02958);
	write_reg(yi->reg_295c, 0x0295c);
	write_reg(yi->reg_2960, 0x02960);
	write_reg(yi->reg_2964, 0x02964);
	write_reg(yi->reg_2968, 0x02968);
	write_reg(yi->reg_296c, 0x0296c);
	write_reg(yi->reg_2970, 0x02970);

	/* Prepare to restore filters */

	/* First the horizontal filter */
	if ((yi->reg_2834 & 0x0000FFFF) == (yi->reg_2834 >> 16)) {
		/* An exact size match uses filter 0 */
		h_filter = 0;
	} else {
		/* Figure out which filter to use */
		h_filter = ((yi->reg_2834 << 16) / (yi->reg_2834 >> 16)) >> 15;
		h_filter = (h_filter >> 1) + (h_filter & 1);
		/* Only an exact size match can use filter 0. */
		h_filter += !h_filter;
	}

	/* Now the vertical filter */
	if ((yi->reg_2918 & 0x0000FFFF) == (yi->reg_2918 >> 16)) {
		/* An exact size match uses filter 0/1 */
		v_filter_1 = 0;
		v_filter_2 = 1;
	} else {
		/* Figure out which filter to use */
		v_filter_1 = ((yi->reg_2918 << 16) / (yi->reg_2918 >> 16)) >> 15;
		v_filter_1 = (v_filter_1 >> 1) + (v_filter_1 & 1);
		/* Only an exact size match can use filter 0 */
		v_filter_1 += !v_filter_1;
		v_filter_2 = v_filter_1;
	}

	/* Now restore the filters */
	ivtv_yuv_filter(itv, h_filter, v_filter_1, v_filter_2);

	/* and clear a few registers */
	write_reg(0, 0x02814);
	write_reg(0, 0x0282c);
	write_reg(0, 0x02904);
	write_reg(0, 0x02910);

	/* Release the blanking buffer */
	if (yi->blanking_ptr) {
		kfree(yi->blanking_ptr);
		yi->blanking_ptr = NULL;
		pci_unmap_single(itv->dev, yi->blanking_dmaptr, 720*16, PCI_DMA_TODEVICE);
	}

	/* Invalidate the old dimension information */
	yi->old_frame_info.src_w = 0;
	yi->old_frame_info.src_h = 0;
	yi->old_frame_info_args.src_w = 0;
	yi->old_frame_info_args.src_h = 0;

	/* All done. */
	clear_bit(IVTV_F_I_DECODING_YUV, &itv->i_flags);
}

Privacy Policy