aboutsummaryrefslogtreecommitdiff
path: root/drivers/video/fbdev/via/lcd.c
blob: 5d21ff436ec80a313dc9133a22b1db08ab7006ae (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
/*
 * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
 * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.

 * 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, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; 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 <linux/via-core.h>
#include <linux/via_i2c.h>
#include "global.h"

#define viafb_compact_res(x, y) (((x)<<16)|(y))

/* CLE266 Software Power Sequence */
/* {Mask}, {Data}, {Delay} */
static const int PowerSequenceOn[3][3] = {
	{0x10, 0x08, 0x06}, {0x10, 0x08, 0x06},	{0x19, 0x1FE, 0x01}
};
static const int PowerSequenceOff[3][3] = {
	{0x06, 0x08, 0x10}, {0x00, 0x00, 0x00},	{0xD2, 0x19, 0x01}
};

static struct _lcd_scaling_factor lcd_scaling_factor = {
	/* LCD Horizontal Scaling Factor Register */
	{LCD_HOR_SCALING_FACTOR_REG_NUM,
	 {{CR9F, 0, 1}, {CR77, 0, 7}, {CR79, 4, 5} } },
	/* LCD Vertical Scaling Factor Register */
	{LCD_VER_SCALING_FACTOR_REG_NUM,
	 {{CR79, 3, 3}, {CR78, 0, 7}, {CR79, 6, 7} } }
};
static struct _lcd_scaling_factor lcd_scaling_factor_CLE = {
	/* LCD Horizontal Scaling Factor Register */
	{LCD_HOR_SCALING_FACTOR_REG_NUM_CLE, {{CR77, 0, 7}, {CR79, 4, 5} } },
	/* LCD Vertical Scaling Factor Register */
	{LCD_VER_SCALING_FACTOR_REG_NUM_CLE, {{CR78, 0, 7}, {CR79, 6, 7} } }
};

static bool lvds_identify_integratedlvds(void);
static void fp_id_to_vindex(int panel_id);
static int lvds_register_read(int index);
static void load_lcd_scaling(int set_hres, int set_vres, int panel_hres,
		      int panel_vres);
static void lcd_patch_skew_dvp0(struct lvds_setting_information
			 *plvds_setting_info,
			 struct lvds_chip_information *plvds_chip_info);
static void lcd_patch_skew_dvp1(struct lvds_setting_information
			 *plvds_setting_info,
			 struct lvds_chip_information *plvds_chip_info);
static void lcd_patch_skew(struct lvds_setting_information
	*plvds_setting_info, struct lvds_chip_information *plvds_chip_info);

static void integrated_lvds_disable(struct lvds_setting_information
			     *plvds_setting_info,
			     struct lvds_chip_information *plvds_chip_info);
static void integrated_lvds_enable(struct lvds_setting_information
			    *plvds_setting_info,
			    struct lvds_chip_information *plvds_chip_info);
static void lcd_powersequence_off(void);
static void lcd_powersequence_on(void);
static void fill_lcd_format(void);
static void check_diport_of_integrated_lvds(
	struct lvds_chip_information *plvds_chip_info,
				     struct lvds_setting_information
				     *plvds_setting_info);

static inline bool check_lvds_chip(int device_id_subaddr, int device_id)
{
	return lvds_register_read(device_id_subaddr) == device_id;
}

void viafb_init_lcd_size(void)
{
	DEBUG_MSG(KERN_INFO "viafb_init_lcd_size()\n");

	fp_id_to_vindex(viafb_lcd_panel_id);
	viaparinfo->lvds_setting_info2->lcd_panel_hres =
		viaparinfo->lvds_setting_info->lcd_panel_hres;
	viaparinfo->lvds_setting_info2->lcd_panel_vres =
		viaparinfo->lvds_setting_info->lcd_panel_vres;
	viaparinfo->lvds_setting_info2->device_lcd_dualedge =
	    viaparinfo->lvds_setting_info->device_lcd_dualedge;
	viaparinfo->lvds_setting_info2->LCDDithering =
		viaparinfo->lvds_setting_info->LCDDithering;
}

static bool lvds_identify_integratedlvds(void)
{
	if (viafb_display_hardware_layout == HW_LAYOUT_LCD_EXTERNAL_LCD2) {
		/* Two dual channel LCD (Internal LVDS + External LVDS): */
		/* If we have an external LVDS, such as VT1636, we should
		   have its chip ID already. */
		if (viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
			viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name =
			    INTEGRATED_LVDS;
			DEBUG_MSG(KERN_INFO "Support two dual channel LVDS! "
				  "(Internal LVDS + External LVDS)\n");
		} else {
			viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
			    INTEGRATED_LVDS;
			DEBUG_MSG(KERN_INFO "Not found external LVDS, "
				  "so can't support two dual channel LVDS!\n");
		}
	} else if (viafb_display_hardware_layout == HW_LAYOUT_LCD1_LCD2) {
		/* Two single channel LCD (Internal LVDS + Internal LVDS): */
		viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
		INTEGRATED_LVDS;
		viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name =
			INTEGRATED_LVDS;
		DEBUG_MSG(KERN_INFO "Support two single channel LVDS! "
			  "(Internal LVDS + Internal LVDS)\n");
	} else if (viafb_display_hardware_layout != HW_LAYOUT_DVI_ONLY) {
		/* If we have found external LVDS, just use it,
		   otherwise, we will use internal LVDS as default. */
		if (!viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
			viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
			    INTEGRATED_LVDS;
			DEBUG_MSG(KERN_INFO "Found Integrated LVDS!\n");
		}
	} else {
		viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
			NON_LVDS_TRANSMITTER;
		DEBUG_MSG(KERN_INFO "Do not support LVDS!\n");
		return false;
	}

	return true;
}

bool viafb_lvds_trasmitter_identify(void)
{
	if (viafb_lvds_identify_vt1636(VIA_PORT_31)) {
		viaparinfo->chip_info->lvds_chip_info.i2c_port = VIA_PORT_31;
		DEBUG_MSG(KERN_INFO
			  "Found VIA VT1636 LVDS on port i2c 0x31\n");
	} else {
		if (viafb_lvds_identify_vt1636(VIA_PORT_2C)) {
			viaparinfo->chip_info->lvds_chip_info.i2c_port =
				VIA_PORT_2C;
			DEBUG_MSG(KERN_INFO
				  "Found VIA VT1636 LVDS on port gpio 0x2c\n");
		}
	}

	if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700)
		lvds_identify_integratedlvds();

	if (viaparinfo->chip_info->lvds_chip_info.lvds_chip_name)
		return true;
	/* Check for VT1631: */
	viaparinfo->chip_info->lvds_chip_info.lvds_chip_name = VT1631_LVDS;
	viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
		VT1631_LVDS_I2C_ADDR;

	if (check_lvds_chip(VT1631_DEVICE_ID_REG, VT1631_DEVICE_ID)) {
		DEBUG_MSG(KERN_INFO "\n VT1631 LVDS ! \n");
		DEBUG_MSG(KERN_INFO "\n %2d",
			  viaparinfo->chip_info->lvds_chip_info.lvds_chip_name);
		DEBUG_MSG(KERN_INFO "\n %2d",
			  viaparinfo->chip_info->lvds_chip_info.lvds_chip_name);
		return true;
	}

	viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
		NON_LVDS_TRANSMITTER;
	viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
		VT1631_LVDS_I2C_ADDR;
	return false;
}

static void fp_id_to_vindex(int panel_id)
{
	DEBUG_MSG(KERN_INFO "fp_get_panel_id()\n");

	if (panel_id > LCD_PANEL_ID_MAXIMUM)
		viafb_lcd_panel_id = panel_id =
		viafb_read_reg(VIACR, CR3F) & 0x0F;

	switch (panel_id) {
	case 0x0:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 640;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 480;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		break;
	case 0x1:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 800;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 600;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		break;
	case 0x2:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		break;
	case 0x3:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		break;
	case 0x4:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 1024;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		break;
	case 0x5:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1400;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 1050;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		break;
	case 0x6:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1600;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 1200;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		break;
	case 0x8:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 800;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 480;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		break;
	case 0x9:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		break;
	case 0xA:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		break;
	case 0xB:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		break;
	case 0xC:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		break;
	case 0xD:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 1024;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		break;
	case 0xE:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1400;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 1050;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		break;
	case 0xF:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1600;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 1200;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		break;
	case 0x10:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1366;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		break;
	case 0x11:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 600;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		break;
	case 0x12:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		break;
	case 0x13:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 800;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		break;
	case 0x14:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1360;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		break;
	case 0x15:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		break;
	case 0x16:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 480;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 640;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		break;
	case 0x17:
		/* OLPC XO-1.5 panel */
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1200;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 900;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		break;
	default:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 800;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 600;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
	}
}

static int lvds_register_read(int index)
{
	u8 data;

	viafb_i2c_readbyte(VIA_PORT_2C,
			(u8) viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr,
			(u8) index, &data);
	return data;
}

static void load_lcd_scaling(int set_hres, int set_vres, int panel_hres,
		      int panel_vres)
{
	int reg_value = 0;
	int viafb_load_reg_num;
	struct io_register *reg = NULL;

	DEBUG_MSG(KERN_INFO "load_lcd_scaling()!!\n");

	/* LCD Scaling Enable */
	viafb_write_reg_mask(CR79, VIACR, 0x07, BIT0 + BIT1 + BIT2);

	/* Check if expansion for horizontal */
	if (set_hres < panel_hres) {
		/* Load Horizontal Scaling Factor */
		switch (viaparinfo->chip_info->gfx_chip_name) {
		case UNICHROME_CLE266:
		case UNICHROME_K400:
			reg_value =
			    CLE266_LCD_HOR_SCF_FORMULA(set_hres, panel_hres);
			viafb_load_reg_num =
			    lcd_scaling_factor_CLE.lcd_hor_scaling_factor.
			    reg_num;
			reg = lcd_scaling_factor_CLE.lcd_hor_scaling_factor.reg;
			viafb_load_reg(reg_value,
				viafb_load_reg_num, reg, VIACR);
			break;
		case UNICHROME_K800:
		case UNICHROME_PM800:
		case UNICHROME_CN700:
		case UNICHROME_CX700:
		case UNICHROME_K8M890:
		case UNICHROME_P4M890:
		case UNICHROME_P4M900:
		case UNICHROME_CN750:
		case UNICHROME_VX800:
		case UNICHROME_VX855:
		case UNICHROME_VX900:
			reg_value =
			    K800_LCD_HOR_SCF_FORMULA(set_hres, panel_hres);
			/* Horizontal scaling enabled */
			viafb_write_reg_mask(CRA2, VIACR, 0xC0, BIT7 + BIT6);
			viafb_load_reg_num =
			    lcd_scaling_factor.lcd_hor_scaling_factor.reg_num;
			reg = lcd_scaling_factor.lcd_hor_scaling_factor.reg;
			viafb_load_reg(reg_value,
				viafb_load_reg_num, reg, VIACR);
			break;
		}

		DEBUG_MSG(KERN_INFO "Horizontal Scaling value = %d", reg_value);
	} else {
		/* Horizontal scaling disabled */
		viafb_write_reg_mask(CRA2, VIACR, 0x00, BIT7);
	}

	/* Check if expansion for vertical */
	if (set_vres < panel_vres) {
		/* Load Vertical Scaling Factor */
		switch (viaparinfo->chip_info->gfx_chip_name) {
		case UNICHROME_CLE266:
		case UNICHROME_K400:
			reg_value =
			    CLE266_LCD_VER_SCF_FORMULA(set_vres, panel_vres);
			viafb_load_reg_num =
			    lcd_scaling_factor_CLE.lcd_ver_scaling_factor.
			    reg_num;
			reg = lcd_scaling_factor_CLE.lcd_ver_scaling_factor.reg;
			viafb_load_reg(reg_value,
				viafb_load_reg_num, reg, VIACR);
			break;
		case UNICHROME_K800:
		case UNICHROME_PM800:
		case UNICHROME_CN700:
		case UNICHROME_CX700:
		case UNICHROME_K8M890:
		case UNICHROME_P4M890:
		case UNICHROME_P4M900:
		case UNICHROME_CN750:
		case UNICHROME_VX800:
		case UNICHROME_VX855:
		case UNICHROME_VX900:
			reg_value =
			    K800_LCD_VER_SCF_FORMULA(set_vres, panel_vres);
			/* Vertical scaling enabled */
			viafb_write_reg_mask(CRA2, VIACR, 0x08, BIT3);
			viafb_load_reg_num =
			    lcd_scaling_factor.lcd_ver_scaling_factor.reg_num;
			reg = lcd_scaling_factor.lcd_ver_scaling_factor.reg;
			viafb_load_reg(reg_value,
				viafb_load_reg_num, reg, VIACR);
			break;
		}

		DEBUG_MSG(KERN_INFO "Vertical Scaling value = %d", reg_value);
	} else {
		/* Vertical scaling disabled */
		viafb_write_reg_mask(CRA2, VIACR, 0x00, BIT3);
	}
}

static void via_pitch_alignment_patch_lcd(int iga_path, int hres, int bpp)
{
	unsigned char cr13, cr35, cr65, cr66, cr67;
	unsigned long dwScreenPitch = 0;
	unsigned long dwPitch;

	dwPitch = hres * (bpp >> 3);
	if (dwPitch & 0x1F) {
		dwScreenPitch = ((dwPitch + 31) & ~31) >> 3;
		if (iga_path == IGA2) {
			if (bpp > 8) {
				cr66 = (unsigned char)(dwScreenPitch & 0xFF);
				viafb_write_reg(CR66, VIACR, cr66);
				cr67 = viafb_read_reg(VIACR, CR67) & 0xFC;
				cr67 |=
				    (unsigned
				     char)((dwScreenPitch & 0x300) >> 8);
				viafb_write_reg(CR67, VIACR, cr67);
			}

			/* Fetch Count */
			cr67 = viafb_read_reg(VIACR, CR67) & 0xF3;
			cr67 |= (unsigned char)((dwScreenPitch & 0x600) >> 7);
			viafb_write_reg(CR67, VIACR, cr67);
			cr65 = (unsigned char)((dwScreenPitch >> 1) & 0xFF);
			cr65 += 2;
			viafb_write_reg(CR65, VIACR, cr65);
		} else {
			if (bpp > 8) {
				cr13 = (unsigned char)(dwScreenPitch & 0xFF);
				viafb_write_reg(CR13, VIACR, cr13);
				cr35 = viafb_read_reg(VIACR, CR35) & 0x1F;
				cr35 |=
				    (unsigned
				     char)((dwScreenPitch & 0x700) >> 3);
				viafb_write_reg(CR35, VIACR, cr35);
			}
		}
	}
}
static void lcd_patch_skew_dvp0(struct lvds_setting_information
			 *plvds_setting_info,
			 struct lvds_chip_information *plvds_chip_info)
{
	if (VT1636_LVDS == plvds_chip_info->lvds_chip_name) {
		switch (viaparinfo->chip_info->gfx_chip_name) {
		case UNICHROME_P4M900:
			viafb_vt1636_patch_skew_on_vt3364(plvds_setting_info,
						    plvds_chip_info);
			break;
		case UNICHROME_P4M890:
			viafb_vt1636_patch_skew_on_vt3327(plvds_setting_info,
						    plvds_chip_info);
			break;
		}
	}
}
static void lcd_patch_skew_dvp1(struct lvds_setting_information
			 *plvds_setting_info,
			 struct lvds_chip_information *plvds_chip_info)
{
	if (VT1636_LVDS == plvds_chip_info->lvds_chip_name) {
		switch (viaparinfo->chip_info->gfx_chip_name) {
		case UNICHROME_CX700:
			viafb_vt1636_patch_skew_on_vt3324(plvds_setting_info,
						    plvds_chip_info);
			break;
		}
	}
}
static void lcd_patch_skew(struct lvds_setting_information
	*plvds_setting_info, struct lvds_chip_information *plvds_chip_info)
{
	DEBUG_MSG(KERN_INFO "lcd_patch_skew\n");
	switch (plvds_chip_info->output_interface) {
	case INTERFACE_DVP0:
		lcd_patch_skew_dvp0(plvds_setting_info, plvds_chip_info);
		break;
	case INTERFACE_DVP1:
		lcd_patch_skew_dvp1(plvds_setting_info, plvds_chip_info);
		break;
	case INTERFACE_DFP_LOW:
		if (UNICHROME_P4M900 == viaparinfo->chip_info->gfx_chip_name) {
			viafb_write_reg_mask(CR99, VIACR, 0x08,
				       BIT0 + BIT1 + BIT2 + BIT3);
		}
		break;
	}
}

/* LCD Set Mode */
void viafb_lcd_set_mode(const struct fb_var_screeninfo *var, u16 cxres,
	u16 cyres, struct lvds_setting_information *plvds_setting_info,
	struct lvds_chip_information *plvds_chip_info)
{
	int set_iga = plvds_setting_info->iga_path;
	int mode_bpp = var->bits_per_pixel;
	int set_hres = cxres ? cxres : var->xres;
	int set_vres = cyres ? cyres : var->yres;
	int panel_hres = plvds_setting_info->lcd_panel_hres;
	int panel_vres = plvds_setting_info->lcd_panel_vres;
	u32 clock;
	struct via_display_timing timing;
	struct fb_var_screeninfo panel_var;
	const struct fb_videomode *mode_crt_table, *panel_crt_table;

	DEBUG_MSG(KERN_INFO "viafb_lcd_set_mode!!\n");
	/* Get mode table */
	mode_crt_table = viafb_get_best_mode(set_hres, set_vres, 60);
	/* Get panel table Pointer */
	panel_crt_table = viafb_get_best_mode(panel_hres, panel_vres, 60);
	viafb_fill_var_timing_info(&panel_var, panel_crt_table);
	DEBUG_MSG(KERN_INFO "bellow viafb_lcd_set_mode!!\n");
	if (VT1636_LVDS == plvds_chip_info->lvds_chip_name)
		viafb_init_lvds_vt1636(plvds_setting_info, plvds_chip_info);
	clock = PICOS2KHZ(panel_crt_table->pixclock) * 1000;
	plvds_setting_info->vclk = clock;

	if (set_iga == IGA2 && (set_hres < panel_hres || set_vres < panel_vres)
		&& plvds_setting_info->display_method == LCD_EXPANDSION) {
		timing = var_to_timing(&panel_var, panel_hres, panel_vres);
		load_lcd_scaling(set_hres, set_vres, panel_hres, panel_vres);
	} else {
		timing = var_to_timing(&panel_var, set_hres, set_vres);
		if (set_iga == IGA2)
			/* disable scaling */
			via_write_reg_mask(VIACR, 0x79, 0x00,
				BIT0 + BIT1 + BIT2);
	}

	if (set_iga == IGA1)
		via_set_primary_timing(&timing);
	else if (set_iga == IGA2)
		via_set_secondary_timing(&timing);

	/* Fetch count for IGA2 only */
	viafb_load_fetch_count_reg(set_hres, mode_bpp / 8, set_iga);

	if ((viaparinfo->chip_info->gfx_chip_name != UNICHROME_CLE266)
		&& (viaparinfo->chip_info->gfx_chip_name != UNICHROME_K400))
		viafb_load_FIFO_reg(set_iga, set_hres, set_vres);

	fill_lcd_format();
	viafb_set_vclock(clock, set_iga);
	lcd_patch_skew(plvds_setting_info, plvds_chip_info);

	/* If K8M800, enable LCD Prefetch Mode. */
	if ((viaparinfo->chip_info->gfx_chip_name == UNICHROME_K800)
	    || (UNICHROME_K8M890 == viaparinfo->chip_info->gfx_chip_name))
		viafb_write_reg_mask(CR6A, VIACR, 0x01, BIT0);

	/* Patch for non 32bit alignment mode */
	via_pitch_alignment_patch_lcd(plvds_setting_info->iga_path, set_hres,
		var->bits_per_pixel);
}

static void integrated_lvds_disable(struct lvds_setting_information
			     *plvds_setting_info,
			     struct lvds_chip_information *plvds_chip_info)
{
	bool turn_off_first_powersequence = false;
	bool turn_off_second_powersequence = false;
	if (INTERFACE_LVDS0LVDS1 == plvds_chip_info->output_interface)
		turn_off_first_powersequence = true;
	if (INTERFACE_LVDS0 == plvds_chip_info->output_interface)
		turn_off_first_powersequence = true;
	if (INTERFACE_LVDS1 == plvds_chip_info->output_interface)
		turn_off_second_powersequence = true;
	if (turn_off_second_powersequence) {
		/* Use second power sequence control: */

		/* Turn off power sequence. */
		viafb_write_reg_mask(CRD4, VIACR, 0, BIT1);

		/* Turn off back light. */
		viafb_write_reg_mask(CRD3, VIACR, 0xC0, BIT6 + BIT7);
	}
	if (turn_off_first_powersequence) {
		/* Use first power sequence control: */

		/* Turn off power sequence. */
		viafb_write_reg_mask(CR6A, VIACR, 0, BIT3);

		/* Turn off back light. */
		viafb_write_reg_mask(CR91, VIACR, 0xC0, BIT6 + BIT7);
	}

	/* Power off LVDS channel. */
	switch (plvds_chip_info->output_interface) {
	case INTERFACE_LVDS0:
		{
			viafb_write_reg_mask(CRD2, VIACR, 0x80, BIT7);
			break;
		}

	case INTERFACE_LVDS1:
		{
			viafb_write_reg_mask(CRD2, VIACR, 0x40, BIT6);
			break;
		}

	case INTERFACE_LVDS0LVDS1:
		{
			viafb_write_reg_mask(CRD2, VIACR, 0xC0, BIT6 + BIT7);
			break;
		}
	}
}

static void integrated_lvds_enable(struct lvds_setting_information
			    *plvds_setting_info,
			    struct lvds_chip_information *plvds_chip_info)
{
	DEBUG_MSG(KERN_INFO "integrated_lvds_enable, out_interface:%d\n",
		  plvds_chip_info->output_interface);
	if (plvds_setting_info->lcd_mode == LCD_SPWG)
		viafb_write_reg_mask(CRD2, VIACR, 0x00, BIT0 + BIT1);
	else
		viafb_write_reg_mask(CRD2, VIACR, 0x03, BIT0 + BIT1);

	switch (plvds_chip_info->output_interface) {
	case INTERFACE_LVDS0LVDS1:
	case INTERFACE_LVDS0:
		/* Use first power sequence control: */
		/* Use hardware control power sequence. */
		viafb_write_reg_mask(CR91, VIACR, 0, BIT0);
		/* Turn on back light. */
		viafb_write_reg_mask(CR91, VIACR, 0, BIT6 + BIT7);
		/* Turn on hardware power sequence. */
		viafb_write_reg_mask(CR6A, VIACR, 0x08, BIT3);
		break;
	case INTERFACE_LVDS1:
		/* Use second power sequence control: */
		/* Use hardware control power sequence. */
		viafb_write_reg_mask(CRD3, VIACR, 0, BIT0);
		/* Turn on back light. */
		viafb_write_reg_mask(CRD3, VIACR, 0, BIT6 + BIT7);
		/* Turn on hardware power sequence. */
		viafb_write_reg_mask(CRD4, VIACR, 0x02, BIT1);
		break;
	}

	/* Power on LVDS channel. */
	switch (plvds_chip_info->output_interface) {
	case INTERFACE_LVDS0:
		{
			viafb_write_reg_mask(CRD2, VIACR, 0, BIT7);
			break;
		}

	case INTERFACE_LVDS1:
		{
			viafb_write_reg_mask(CRD2, VIACR, 0, BIT6);
			break;
		}

	case INTERFACE_LVDS0LVDS1:
		{
			viafb_write_reg_mask(CRD2, VIACR, 0, BIT6 + BIT7);
			break;
		}
	}
}

void viafb_lcd_disable(void)
{

	if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
		lcd_powersequence_off();
		/* DI1 pad off */
		viafb_write_reg_mask(SR1E, VIASR, 0x00, 0x30);
	} else if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700) {
		if (viafb_LCD2_ON
		    && (INTEGRATED_LVDS ==
			viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name))
			integrated_lvds_disable(viaparinfo->lvds_setting_info,
				&viaparinfo->chip_info->lvds_chip_info2);
		if (INTEGRATED_LVDS ==
			viaparinfo->chip_info->lvds_chip_info.lvds_chip_name)
			integrated_lvds_disable(viaparinfo->lvds_setting_info,
				&viaparinfo->chip_info->lvds_chip_info);
		if (VT1636_LVDS == viaparinfo->chip_info->
			lvds_chip_info.lvds_chip_name)
			viafb_disable_lvds_vt1636(viaparinfo->lvds_setting_info,
				&viaparinfo->chip_info->lvds_chip_info);
	} else if (VT1636_LVDS ==
	viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
		viafb_disable_lvds_vt1636(viaparinfo->lvds_setting_info,
				    &viaparinfo->chip_info->lvds_chip_info);
	} else {
		/* Backlight off           */
		viafb_write_reg_mask(SR3D, VIASR, 0x00, 0x20);
		/* 24 bit DI data paht off */
		viafb_write_reg_mask(CR91, VIACR, 0x80, 0x80);
	}

	/* Disable expansion bit   */
	viafb_write_reg_mask(CR79, VIACR, 0x00, 0x01);
	/* Simultaneout disabled   */
	viafb_write_reg_mask(CR6B, VIACR, 0x00, 0x08);
}

static void set_lcd_output_path(int set_iga, int output_interface)
{
	switch (output_interface) {
	case INTERFACE_DFP:
		if ((UNICHROME_K8M890 == viaparinfo->chip_info->gfx_chip_name)
		    || (UNICHROME_P4M890 ==
		    viaparinfo->chip_info->gfx_chip_name))
			viafb_write_reg_mask(CR97, VIACR, 0x84,
				       BIT7 + BIT2 + BIT1 + BIT0);
	case INTERFACE_DVP0:
	case INTERFACE_DVP1:
	case INTERFACE_DFP_HIGH:
	case INTERFACE_DFP_LOW:
		if (set_iga == IGA2)
			viafb_write_reg(CR91, VIACR, 0x00);
		break;
	}
}

void viafb_lcd_enable(void)
{
	viafb_write_reg_mask(CR6B, VIACR, 0x00, BIT3);
	viafb_write_reg_mask(CR6A, VIACR, 0x08, BIT3);
	set_lcd_output_path(viaparinfo->lvds_setting_info->iga_path,
		viaparinfo->chip_info->lvds_chip_info.output_interface);
	if (viafb_LCD2_ON)
		set_lcd_output_path(viaparinfo->lvds_setting_info2->iga_path,
			viaparinfo->chip_info->
			lvds_chip_info2.output_interface);

	if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
		/* DI1 pad on */
		viafb_write_reg_mask(SR1E, VIASR, 0x30, 0x30);
		lcd_powersequence_on();
	} else if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700) {
		if (viafb_LCD2_ON && (INTEGRATED_LVDS ==
			viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name))
			integrated_lvds_enable(viaparinfo->lvds_setting_info2, \
				&viaparinfo->chip_info->lvds_chip_info2);
		if (INTEGRATED_LVDS ==
			viaparinfo->chip_info->lvds_chip_info.lvds_chip_name)
			integrated_lvds_enable(viaparinfo->lvds_setting_info,
				&viaparinfo->chip_info->lvds_chip_info);
		if (VT1636_LVDS == viaparinfo->chip_info->
			lvds_chip_info.lvds_chip_name)
			viafb_enable_lvds_vt1636(viaparinfo->
			lvds_setting_info, &viaparinfo->chip_info->
			lvds_chip_info);
	} else if (VT1636_LVDS ==
	viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
		viafb_enable_lvds_vt1636(viaparinfo->lvds_setting_info,
				   &viaparinfo->chip_info->lvds_chip_info);
	} else {
		/* Backlight on            */
		viafb_write_reg_mask(SR3D, VIASR, 0x20, 0x20);
		/* 24 bit DI data paht on  */
		viafb_write_reg_mask(CR91, VIACR, 0x00, 0x80);
		/* LCD enabled             */
		viafb_write_reg_mask(CR6A, VIACR, 0x48, 0x48);
	}
}

static void lcd_powersequence_off(void)
{
	int i, mask, data;

	/* Software control power sequence */
	viafb_write_reg_mask(CR91, VIACR, 0x11, 0x11);

	for (i = 0; i < 3; i++) {
		mask = PowerSequenceOff[0][i];
		data = PowerSequenceOff[1][i] & mask;
		viafb_write_reg_mask(CR91, VIACR, (u8) data, (u8) mask);
		udelay(PowerSequenceOff[2][i]);
	}

	/* Disable LCD */
	viafb_write_reg_mask(CR6A, VIACR, 0x00, 0x08);
}

static void lcd_powersequence_on(void)
{
	int i, mask, data;

	/* Software control power sequence */
	viafb_write_reg_mask(CR91, VIACR, 0x11, 0x11);

	/* Enable LCD */
	viafb_write_reg_mask(CR6A, VIACR, 0x08, 0x08);

	for (i = 0; i < 3; i++) {
		mask = PowerSequenceOn[0][i];
		data = PowerSequenceOn[1][i] & mask;
		viafb_write_reg_mask(CR91, VIACR, (u8) data, (u8) mask);
		udelay(PowerSequenceOn[2][i]);
	}

	udelay(1);
}

static void fill_lcd_format(void)
{
	u8 bdithering = 0, bdual = 0;

	if (viaparinfo->lvds_setting_info->device_lcd_dualedge)
		bdual = BIT4;
	if (viaparinfo->lvds_setting_info->LCDDithering)
		bdithering = BIT0;
	/* Dual & Dithering */
	viafb_write_reg_mask(CR88, VIACR, (bdithering | bdual), BIT4 + BIT0);
}

static void check_diport_of_integrated_lvds(
	struct lvds_chip_information *plvds_chip_info,
				     struct lvds_setting_information
				     *plvds_setting_info)
{
	/* Determine LCD DI Port by hardware layout. */
	switch (viafb_display_hardware_layout) {
	case HW_LAYOUT_LCD_ONLY:
		{
			if (plvds_setting_info->device_lcd_dualedge) {
				plvds_chip_info->output_interface =
				    INTERFACE_LVDS0LVDS1;
			} else {
				plvds_chip_info->output_interface =
				    INTERFACE_LVDS0;
			}

			break;
		}

	case HW_LAYOUT_DVI_ONLY:
		{
			plvds_chip_info->output_interface = INTERFACE_NONE;
			break;
		}

	case HW_LAYOUT_LCD1_LCD2:
	case HW_LAYOUT_LCD_EXTERNAL_LCD2:
		{
			plvds_chip_info->output_interface =
			    INTERFACE_LVDS0LVDS1;
			break;
		}

	case HW_LAYOUT_LCD_DVI:
		{
			plvds_chip_info->output_interface = INTERFACE_LVDS1;
			break;
		}

	default:
		{
			plvds_chip_info->output_interface = INTERFACE_LVDS1;
			break;
		}
	}

	DEBUG_MSG(KERN_INFO
		  "Display Hardware Layout: 0x%x, LCD DI Port: 0x%x\n",
		  viafb_display_hardware_layout,
		  plvds_chip_info->output_interface);
}

void viafb_init_lvds_output_interface(struct lvds_chip_information
				*plvds_chip_info,
				struct lvds_setting_information
				*plvds_setting_info)
{
	if (INTERFACE_NONE != plvds_chip_info->output_interface) {
		/*Do nothing, lcd port is specified by module parameter */
		return;
	}

	switch (plvds_chip_info->lvds_chip_name) {

	case VT1636_LVDS:
		switch (viaparinfo->chip_info->gfx_chip_name) {
		case UNICHROME_CX700:
			plvds_chip_info->output_interface = INTERFACE_DVP1;
			break;
		case UNICHROME_CN700:
			plvds_chip_info->output_interface = INTERFACE_DFP_LOW;
			break;
		default:
			plvds_chip_info->output_interface = INTERFACE_DVP0;
			break;
		}
		break;

	case INTEGRATED_LVDS:
		check_diport_of_integrated_lvds(plvds_chip_info,
						plvds_setting_info);
		break;

	default:
		switch (viaparinfo->chip_info->gfx_chip_name) {
		case UNICHROME_K8M890:
		case UNICHROME_P4M900:
		case UNICHROME_P4M890:
			plvds_chip_info->output_interface = INTERFACE_DFP_LOW;
			break;
		default:
			plvds_chip_info->output_interface = INTERFACE_DFP;
			break;
		}
		break;
	}
}

bool viafb_lcd_get_mobile_state(bool *mobile)
{
	unsigned char __iomem *romptr, *tableptr, *biosptr;
	u8 core_base;
	/* Rom address */
	const u32 romaddr = 0x000C0000;
	u16 start_pattern;

	biosptr = ioremap(romaddr, 0x10000);
	start_pattern = readw(biosptr);

	/* Compare pattern */
	if (start_pattern == 0xAA55) {
		/* Get the start of Table */
		/* 0x1B means BIOS offset position */
		romptr = biosptr + 0x1B;
		tableptr = biosptr + readw(romptr);

		/* Get the start of biosver structure */
		/* 18 means BIOS version position. */
		romptr = tableptr + 18;
		romptr = biosptr + readw(romptr);

		/* The offset should be 44, but the
		   actual image is less three char. */
		/* pRom += 44; */
		romptr += 41;

		core_base = readb(romptr);

		if (core_base & 0x8)
			*mobile = false;
		else
			*mobile = true;
		/* release memory */
		iounmap(biosptr);

		return true;
	} else {
		iounmap(biosptr);
		return false;
	}
}