summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/sti/sti_tvout.c
blob: 5767e93dd1cdc034c520adac8b774f745c1f185a (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
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) STMicroelectronics SA 2014
 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
 *          Vincent Abriou <vincent.abriou@st.com>
 *          for STMicroelectronics.
 */

#include <linux/clk.h>
#include <linux/component.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/seq_file.h>

#include <drm/drm_atomic_helper.h>
#include <drm/drm_debugfs.h>
#include <drm/drm_device.h>
#include <drm/drm_file.h>
#include <drm/drm_print.h>

#include "sti_crtc.h"
#include "sti_drv.h"
#include "sti_vtg.h"

/* glue registers */
#define TVO_CSC_MAIN_M0                  0x000
#define TVO_CSC_MAIN_M1                  0x004
#define TVO_CSC_MAIN_M2                  0x008
#define TVO_CSC_MAIN_M3                  0x00c
#define TVO_CSC_MAIN_M4                  0x010
#define TVO_CSC_MAIN_M5                  0x014
#define TVO_CSC_MAIN_M6                  0x018
#define TVO_CSC_MAIN_M7                  0x01c
#define TVO_MAIN_IN_VID_FORMAT           0x030
#define TVO_CSC_AUX_M0                   0x100
#define TVO_CSC_AUX_M1                   0x104
#define TVO_CSC_AUX_M2                   0x108
#define TVO_CSC_AUX_M3                   0x10c
#define TVO_CSC_AUX_M4                   0x110
#define TVO_CSC_AUX_M5                   0x114
#define TVO_CSC_AUX_M6                   0x118
#define TVO_CSC_AUX_M7                   0x11c
#define TVO_AUX_IN_VID_FORMAT            0x130
#define TVO_VIP_HDF                      0x400
#define TVO_HD_SYNC_SEL                  0x418
#define TVO_HD_DAC_CFG_OFF               0x420
#define TVO_VIP_HDMI                     0x500
#define TVO_HDMI_FORCE_COLOR_0           0x504
#define TVO_HDMI_FORCE_COLOR_1           0x508
#define TVO_HDMI_CLIP_VALUE_B_CB         0x50c
#define TVO_HDMI_CLIP_VALUE_Y_G          0x510
#define TVO_HDMI_CLIP_VALUE_R_CR         0x514
#define TVO_HDMI_SYNC_SEL                0x518
#define TVO_HDMI_DFV_OBS                 0x540
#define TVO_VIP_DVO                      0x600
#define TVO_DVO_SYNC_SEL                 0x618
#define TVO_DVO_CONFIG                   0x620

#define TVO_IN_FMT_SIGNED                BIT(0)
#define TVO_SYNC_EXT                     BIT(4)

#define TVO_VIP_REORDER_R_SHIFT          24
#define TVO_VIP_REORDER_G_SHIFT          20
#define TVO_VIP_REORDER_B_SHIFT          16
#define TVO_VIP_REORDER_MASK             0x3
#define TVO_VIP_REORDER_Y_G_SEL          0
#define TVO_VIP_REORDER_CB_B_SEL         1
#define TVO_VIP_REORDER_CR_R_SEL         2

#define TVO_VIP_CLIP_SHIFT               8
#define TVO_VIP_CLIP_MASK                0x7
#define TVO_VIP_CLIP_DISABLED            0
#define TVO_VIP_CLIP_EAV_SAV             1
#define TVO_VIP_CLIP_LIMITED_RANGE_RGB_Y 2
#define TVO_VIP_CLIP_LIMITED_RANGE_CB_CR 3
#define TVO_VIP_CLIP_PROG_RANGE          4

#define TVO_VIP_RND_SHIFT                4
#define TVO_VIP_RND_MASK                 0x3
#define TVO_VIP_RND_8BIT_ROUNDED         0
#define TVO_VIP_RND_10BIT_ROUNDED        1
#define TVO_VIP_RND_12BIT_ROUNDED        2

#define TVO_VIP_SEL_INPUT_MASK           0xf
#define TVO_VIP_SEL_INPUT_MAIN           0x0
#define TVO_VIP_SEL_INPUT_AUX            0x8
#define TVO_VIP_SEL_INPUT_FORCE_COLOR    0xf
#define TVO_VIP_SEL_INPUT_BYPASS_MASK    0x1
#define TVO_VIP_SEL_INPUT_BYPASSED       1

#define TVO_SYNC_MAIN_VTG_SET_REF        0x00
#define TVO_SYNC_AUX_VTG_SET_REF         0x10

#define TVO_SYNC_HD_DCS_SHIFT            8

#define TVO_SYNC_DVO_PAD_HSYNC_SHIFT     8
#define TVO_SYNC_DVO_PAD_VSYNC_SHIFT     16

#define ENCODER_CRTC_MASK                (BIT(0) | BIT(1))

#define TVO_MIN_HD_HEIGHT                720

/* enum listing the supported output data format */
enum sti_tvout_video_out_type {
	STI_TVOUT_VIDEO_OUT_RGB,
	STI_TVOUT_VIDEO_OUT_YUV,
};

struct sti_tvout {
	struct device *dev;
	struct drm_device *drm_dev;
	void __iomem *regs;
	struct reset_control *reset;
	struct drm_encoder *hdmi;
	struct drm_encoder *hda;
	struct drm_encoder *dvo;
	bool debugfs_registered;
};

struct sti_tvout_encoder {
	struct drm_encoder encoder;
	struct sti_tvout *tvout;
};

#define to_sti_tvout_encoder(x) \
	container_of(x, struct sti_tvout_encoder, encoder)

#define to_sti_tvout(x) to_sti_tvout_encoder(x)->tvout

/* preformatter conversion matrix */
static const u32 rgb_to_ycbcr_601[8] = {
	0xF927082E, 0x04C9FEAB, 0x01D30964, 0xFA95FD3D,
	0x0000082E, 0x00002000, 0x00002000, 0x00000000
};

/* 709 RGB to YCbCr */
static const u32 rgb_to_ycbcr_709[8] = {
	0xF891082F, 0x0367FF40, 0x01280B71, 0xF9B1FE20,
	0x0000082F, 0x00002000, 0x00002000, 0x00000000
};

static u32 tvout_read(struct sti_tvout *tvout, int offset)
{
	return readl(tvout->regs + offset);
}

static void tvout_write(struct sti_tvout *tvout, u32 val, int offset)
{
	writel(val, tvout->regs + offset);
}

/**
 * Set the clipping mode of a VIP
 *
 * @tvout: tvout structure
 * @reg: register to set
 * @cr_r: red chroma or red order
 * @y_g: y or green order
 * @cb_b: blue chroma or blue order
 */
static void tvout_vip_set_color_order(struct sti_tvout *tvout, int reg,
				      u32 cr_r, u32 y_g, u32 cb_b)
{
	u32 val = tvout_read(tvout, reg);

	val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_R_SHIFT);
	val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_G_SHIFT);
	val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_B_SHIFT);
	val |= cr_r << TVO_VIP_REORDER_R_SHIFT;
	val |= y_g << TVO_VIP_REORDER_G_SHIFT;
	val |= cb_b << TVO_VIP_REORDER_B_SHIFT;

	tvout_write(tvout, val, reg);
}

/**
 * Set the clipping mode of a VIP
 *
 * @tvout: tvout structure
 * @reg: register to set
 * @range: clipping range
 */
static void tvout_vip_set_clip_mode(struct sti_tvout *tvout, int reg, u32 range)
{
	u32 val = tvout_read(tvout, reg);

	val &= ~(TVO_VIP_CLIP_MASK << TVO_VIP_CLIP_SHIFT);
	val |= range << TVO_VIP_CLIP_SHIFT;
	tvout_write(tvout, val, reg);
}

/**
 * Set the rounded value of a VIP
 *
 * @tvout: tvout structure
 * @reg: register to set
 * @rnd: rounded val per component
 */
static void tvout_vip_set_rnd(struct sti_tvout *tvout, int reg, u32 rnd)
{
	u32 val = tvout_read(tvout, reg);

	val &= ~(TVO_VIP_RND_MASK << TVO_VIP_RND_SHIFT);
	val |= rnd << TVO_VIP_RND_SHIFT;
	tvout_write(tvout, val, reg);
}

/**
 * Select the VIP input
 *
 * @tvout: tvout structure
 * @reg: register to set
 * @main_path: main or auxiliary path
 * @video_out: selected_input (main/aux + conv)
 */
static void tvout_vip_set_sel_input(struct sti_tvout *tvout,
				    int reg,
				    bool main_path,
				    enum sti_tvout_video_out_type video_out)
{
	u32 sel_input;
	u32 val = tvout_read(tvout, reg);

	if (main_path)
		sel_input = TVO_VIP_SEL_INPUT_MAIN;
	else
		sel_input = TVO_VIP_SEL_INPUT_AUX;

	switch (video_out) {
	case STI_TVOUT_VIDEO_OUT_RGB:
		sel_input |= TVO_VIP_SEL_INPUT_BYPASSED;
		break;
	case STI_TVOUT_VIDEO_OUT_YUV:
		sel_input &= ~TVO_VIP_SEL_INPUT_BYPASSED;
		break;
	}

	/* on stih407 chip the sel_input bypass mode logic is inverted */
	sel_input = sel_input ^ TVO_VIP_SEL_INPUT_BYPASS_MASK;

	val &= ~TVO_VIP_SEL_INPUT_MASK;
	val |= sel_input;
	tvout_write(tvout, val, reg);
}

/**
 * Select the input video signed or unsigned
 *
 * @tvout: tvout structure
 * @reg: register to set
 * @in_vid_fmt: used video input format
 */
static void tvout_vip_set_in_vid_fmt(struct sti_tvout *tvout,
		int reg, u32 in_vid_fmt)
{
	u32 val = tvout_read(tvout, reg);

	val &= ~TVO_IN_FMT_SIGNED;
	val |= in_vid_fmt;
	tvout_write(tvout, val, reg);
}

/**
 * Set preformatter matrix
 *
 * @tvout: tvout structure
 * @mode: display mode structure
 */
static void tvout_preformatter_set_matrix(struct sti_tvout *tvout,
					  struct drm_display_mode *mode)
{
	unsigned int i;
	const u32 *pf_matrix;

	if (mode->vdisplay >= TVO_MIN_HD_HEIGHT)
		pf_matrix = rgb_to_ycbcr_709;
	else
		pf_matrix = rgb_to_ycbcr_601;

	for (i = 0; i < 8; i++) {
		tvout_write(tvout, *(pf_matrix + i),
			    TVO_CSC_MAIN_M0 + (i * 4));
		tvout_write(tvout, *(pf_matrix + i),
			    TVO_CSC_AUX_M0 + (i * 4));
	}
}

/**
 * Start VIP block for DVO output
 *
 * @tvout: pointer on tvout structure
 * @main_path: true if main path has to be used in the vip configuration
 *	  else aux path is used.
 */
static void tvout_dvo_start(struct sti_tvout *tvout, bool main_path)
{
	u32 tvo_in_vid_format;
	int val, tmp;

	dev_dbg(tvout->dev, "%s\n", __func__);

	if (main_path) {
		DRM_DEBUG_DRIVER("main vip for DVO\n");
		/* Select the input sync for dvo */
		tmp = TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_DVO;
		val  = tmp << TVO_SYNC_DVO_PAD_VSYNC_SHIFT;
		val |= tmp << TVO_SYNC_DVO_PAD_HSYNC_SHIFT;
		val |= tmp;
		tvout_write(tvout, val, TVO_DVO_SYNC_SEL);
		tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT;
	} else {
		DRM_DEBUG_DRIVER("aux vip for DVO\n");
		/* Select the input sync for dvo */
		tmp = TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_DVO;
		val  = tmp << TVO_SYNC_DVO_PAD_VSYNC_SHIFT;
		val |= tmp << TVO_SYNC_DVO_PAD_HSYNC_SHIFT;
		val |= tmp;
		tvout_write(tvout, val, TVO_DVO_SYNC_SEL);
		tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT;
	}

	/* Set color channel order */
	tvout_vip_set_color_order(tvout, TVO_VIP_DVO,
				  TVO_VIP_REORDER_CR_R_SEL,
				  TVO_VIP_REORDER_Y_G_SEL,
				  TVO_VIP_REORDER_CB_B_SEL);

	/* Set clipping mode */
	tvout_vip_set_clip_mode(tvout, TVO_VIP_DVO, TVO_VIP_CLIP_DISABLED);

	/* Set round mode (rounded to 8-bit per component) */
	tvout_vip_set_rnd(tvout, TVO_VIP_DVO, TVO_VIP_RND_8BIT_ROUNDED);

	/* Set input video format */
	tvout_vip_set_in_vid_fmt(tvout, tvo_in_vid_format, TVO_IN_FMT_SIGNED);

	/* Input selection */
	tvout_vip_set_sel_input(tvout, TVO_VIP_DVO, main_path,
				STI_TVOUT_VIDEO_OUT_RGB);
}

/**
 * Start VIP block for HDMI output
 *
 * @tvout: pointer on tvout structure
 * @main_path: true if main path has to be used in the vip configuration
 *	  else aux path is used.
 */
static void tvout_hdmi_start(struct sti_tvout *tvout, bool main_path)
{
	u32 tvo_in_vid_format;

	dev_dbg(tvout->dev, "%s\n", __func__);

	if (main_path) {
		DRM_DEBUG_DRIVER("main vip for hdmi\n");
		/* select the input sync for hdmi */
		tvout_write(tvout,
			    TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_HDMI,
			    TVO_HDMI_SYNC_SEL);
		tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT;
	} else {
		DRM_DEBUG_DRIVER("aux vip for hdmi\n");
		/* select the input sync for hdmi */
		tvout_write(tvout,
			    TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_HDMI,
			    TVO_HDMI_SYNC_SEL);
		tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT;
	}

	/* set color channel order */
	tvout_vip_set_color_order(tvout, TVO_VIP_HDMI,
				  TVO_VIP_REORDER_CR_R_SEL,
				  TVO_VIP_REORDER_Y_G_SEL,
				  TVO_VIP_REORDER_CB_B_SEL);

	/* set clipping mode */
	tvout_vip_set_clip_mode(tvout, TVO_VIP_HDMI, TVO_VIP_CLIP_DISABLED);

	/* set round mode (rounded to 8-bit per component) */
	tvout_vip_set_rnd(tvout, TVO_VIP_HDMI, TVO_VIP_RND_8BIT_ROUNDED);

	/* set input video format */
	tvout_vip_set_in_vid_fmt(tvout, tvo_in_vid_format, TVO_IN_FMT_SIGNED);

	/* input selection */
	tvout_vip_set_sel_input(tvout, TVO_VIP_HDMI, main_path,
				STI_TVOUT_VIDEO_OUT_RGB);
}

/**
 * Start HDF VIP and HD DAC
 *
 * @tvout: pointer on tvout structure
 * @main_path: true if main path has to be used in the vip configuration
 *	  else aux path is used.
 */
static void tvout_hda_start(struct sti_tvout *tvout, bool main_path)
{
	u32 tvo_in_vid_format;
	int val;

	dev_dbg(tvout->dev, "%s\n", __func__);

	if (main_path) {
		DRM_DEBUG_DRIVER("main vip for HDF\n");
		/* Select the input sync for HD analog and HD DCS */
		val  = TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_HDDCS;
		val  = val << TVO_SYNC_HD_DCS_SHIFT;
		val |= TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_HDF;
		tvout_write(tvout, val, TVO_HD_SYNC_SEL);
		tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT;
	} else {
		DRM_DEBUG_DRIVER("aux vip for HDF\n");
		/* Select the input sync for HD analog and HD DCS */
		val  = TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_HDDCS;
		val  = val << TVO_SYNC_HD_DCS_SHIFT;
		val |= TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_HDF;
		tvout_write(tvout, val, TVO_HD_SYNC_SEL);
		tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT;
	}

	/* set color channel order */
	tvout_vip_set_color_order(tvout, TVO_VIP_HDF,
				  TVO_VIP_REORDER_CR_R_SEL,
				  TVO_VIP_REORDER_Y_G_SEL,
				  TVO_VIP_REORDER_CB_B_SEL);

	/* set clipping mode */
	tvout_vip_set_clip_mode(tvout, TVO_VIP_HDF, TVO_VIP_CLIP_DISABLED);

	/* set round mode (rounded to 10-bit per component) */
	tvout_vip_set_rnd(tvout, TVO_VIP_HDF, TVO_VIP_RND_10BIT_ROUNDED);

	/* Set input video format */
	tvout_vip_set_in_vid_fmt(tvout, tvo_in_vid_format, TVO_IN_FMT_SIGNED);

	/* Input selection */
	tvout_vip_set_sel_input(tvout, TVO_VIP_HDF, main_path,
				STI_TVOUT_VIDEO_OUT_YUV);

	/* power up HD DAC */
	tvout_write(tvout, 0, TVO_HD_DAC_CFG_OFF);
}

#define DBGFS_DUMP(reg) seq_printf(s, "\n  %-25s 0x%08X", #reg, \
				   readl(tvout->regs + reg))

static void tvout_dbg_vip(struct seq_file *s, int val)
{
	int r, g, b, tmp, mask;
	char *const reorder[] = {"Y_G", "Cb_B", "Cr_R"};
	char *const clipping[] = {"No", "EAV/SAV", "Limited range RGB/Y",
				  "Limited range Cb/Cr", "decided by register"};
	char *const round[] = {"8-bit", "10-bit", "12-bit"};
	char *const input_sel[] = {"Main (color matrix enabled)",
				   "Main (color matrix by-passed)",
				   "", "", "", "", "", "",
				   "Aux (color matrix enabled)",
				   "Aux (color matrix by-passed)",
				   "", "", "", "", "", "Force value"};

	seq_putc(s, '\t');
	mask = TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_R_SHIFT;
	r = (val & mask) >> TVO_VIP_REORDER_R_SHIFT;
	mask = TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_G_SHIFT;
	g = (val & mask) >> TVO_VIP_REORDER_G_SHIFT;
	mask = TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_B_SHIFT;
	b = (val & mask) >> TVO_VIP_REORDER_B_SHIFT;
	seq_printf(s, "%-24s %s->%s %s->%s %s->%s\n", "Reorder:",
		   reorder[r], reorder[TVO_VIP_REORDER_CR_R_SEL],
		   reorder[g], reorder[TVO_VIP_REORDER_Y_G_SEL],
		   reorder[b], reorder[TVO_VIP_REORDER_CB_B_SEL]);
	seq_puts(s, "\t\t\t\t\t");
	mask = TVO_VIP_CLIP_MASK << TVO_VIP_CLIP_SHIFT;
	tmp = (val & mask) >> TVO_VIP_CLIP_SHIFT;
	seq_printf(s, "%-24s %s\n", "Clipping:", clipping[tmp]);
	seq_puts(s, "\t\t\t\t\t");
	mask = TVO_VIP_RND_MASK << TVO_VIP_RND_SHIFT;
	tmp = (val & mask) >> TVO_VIP_RND_SHIFT;
	seq_printf(s, "%-24s input data rounded to %s per component\n",
		   "Round:", round[tmp]);
	seq_puts(s, "\t\t\t\t\t");
	tmp = (val & TVO_VIP_SEL_INPUT_MASK);
	seq_printf(s, "%-24s %s", "Input selection:", input_sel[tmp]);
}

static void tvout_dbg_hd_dac_cfg(struct seq_file *s, int val)
{
	seq_printf(s, "\t%-24s %s", "HD DAC:",
		   val & 1 ? "disabled" : "enabled");
}

static int tvout_dbg_show(struct seq_file *s, void *data)
{
	struct drm_info_node *node = s->private;
	struct sti_tvout *tvout = (struct sti_tvout *)node->info_ent->data;
	struct drm_crtc *crtc;

	seq_printf(s, "TVOUT: (vaddr = 0x%p)", tvout->regs);

	seq_puts(s, "\n\n  HDMI encoder: ");
	crtc = tvout->hdmi->crtc;
	if (crtc) {
		seq_printf(s, "connected to %s path",
			   sti_crtc_is_main(crtc) ? "main" : "aux");
		DBGFS_DUMP(TVO_HDMI_SYNC_SEL);
		DBGFS_DUMP(TVO_VIP_HDMI);
		tvout_dbg_vip(s, readl(tvout->regs + TVO_VIP_HDMI));
	} else {
		seq_puts(s, "disabled");
	}

	seq_puts(s, "\n\n  DVO encoder: ");
	crtc = tvout->dvo->crtc;
	if (crtc) {
		seq_printf(s, "connected to %s path",
			   sti_crtc_is_main(crtc) ? "main" : "aux");
		DBGFS_DUMP(TVO_DVO_SYNC_SEL);
		DBGFS_DUMP(TVO_DVO_CONFIG);
		DBGFS_DUMP(TVO_VIP_DVO);
		tvout_dbg_vip(s, readl(tvout->regs + TVO_VIP_DVO));
	} else {
		seq_puts(s, "disabled");
	}

	seq_puts(s, "\n\n  HDA encoder: ");
	crtc = tvout->hda->crtc;
	if (crtc) {
		seq_printf(s, "connected to %s path",
			   sti_crtc_is_main(crtc) ? "main" : "aux");
		DBGFS_DUMP(TVO_HD_SYNC_SEL);
		DBGFS_DUMP(TVO_HD_DAC_CFG_OFF);
		tvout_dbg_hd_dac_cfg(s,
				     readl(tvout->regs + TVO_HD_DAC_CFG_OFF));
		DBGFS_DUMP(TVO_VIP_HDF);
		tvout_dbg_vip(s, readl(tvout->regs + TVO_VIP_HDF));
	} else {
		seq_puts(s, "disabled");
	}

	seq_puts(s, "\n\n  main path configuration");
	DBGFS_DUMP(TVO_CSC_MAIN_M0);
	DBGFS_DUMP(TVO_CSC_MAIN_M1);
	DBGFS_DUMP(TVO_CSC_MAIN_M2);
	DBGFS_DUMP(TVO_CSC_MAIN_M3);
	DBGFS_DUMP(TVO_CSC_MAIN_M4);
	DBGFS_DUMP(TVO_CSC_MAIN_M5);
	DBGFS_DUMP(TVO_CSC_MAIN_M6);
	DBGFS_DUMP(TVO_CSC_MAIN_M7);
	DBGFS_DUMP(TVO_MAIN_IN_VID_FORMAT);

	seq_puts(s, "\n\n  auxiliary path configuration");
	DBGFS_DUMP(TVO_CSC_AUX_M0);
	DBGFS_DUMP(TVO_CSC_AUX_M2);
	DBGFS_DUMP(TVO_CSC_AUX_M3);
	DBGFS_DUMP(TVO_CSC_AUX_M4);
	DBGFS_DUMP(TVO_CSC_AUX_M5);
	DBGFS_DUMP(TVO_CSC_AUX_M6);
	DBGFS_DUMP(TVO_CSC_AUX_M7);
	DBGFS_DUMP(TVO_AUX_IN_VID_FORMAT);
	seq_putc(s, '\n');
	return 0;
}

static struct drm_info_list tvout_debugfs_files[] = {
	{ "tvout", tvout_dbg_show, 0, NULL },
};

static int tvout_debugfs_init(struct sti_tvout *tvout, struct drm_minor *minor)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(tvout_debugfs_files); i++)
		tvout_debugfs_files[i].data = tvout;

	return drm_debugfs_create_files(tvout_debugfs_files,
					ARRAY_SIZE(tvout_debugfs_files),
					minor->debugfs_root, minor);
}

static void sti_tvout_encoder_dpms(struct drm_encoder *encoder, int mode)
{
}

static void sti_tvout_encoder_mode_set(struct drm_encoder *encoder,
				       struct drm_display_mode *mode,
				       struct drm_display_mode *adjusted_mode)
{
}

static void sti_tvout_encoder_destroy(struct drm_encoder *encoder)
{
	struct sti_tvout_encoder *sti_encoder = to_sti_tvout_encoder(encoder);

	drm_encoder_cleanup(encoder);
	kfree(sti_encoder);
}

static int sti_tvout_late_register(struct drm_encoder *encoder)
{
	struct sti_tvout *tvout = to_sti_tvout(encoder);
	int ret;

	if (tvout->debugfs_registered)
		return 0;

	ret = tvout_debugfs_init(tvout, encoder->dev->primary);
	if (ret)
		return ret;

	tvout->debugfs_registered = true;
	return 0;
}

static void sti_tvout_early_unregister(struct drm_encoder *encoder)
{
	struct sti_tvout *tvout = to_sti_tvout(encoder);

	if (!tvout->debugfs_registered)
		return;

	tvout->debugfs_registered = false;
}

static const struct drm_encoder_funcs sti_tvout_encoder_funcs = {
	.destroy = sti_tvout_encoder_destroy,
	.late_register = sti_tvout_late_register,
	.early_unregister = sti_tvout_early_unregister,
};

static void sti_dvo_encoder_enable(struct drm_encoder *encoder)
{
	struct sti_tvout *tvout = to_sti_tvout(encoder);

	tvout_preformatter_set_matrix(tvout, &encoder->crtc->mode);

	tvout_dvo_start(tvout, sti_crtc_is_main(encoder->crtc));
}

static void sti_dvo_encoder_disable(struct drm_encoder *encoder)
{
	struct sti_tvout *tvout = to_sti_tvout(encoder);

	/* Reset VIP register */
	tvout_write(tvout, 0x0, TVO_VIP_DVO);
}

static const struct drm_encoder_helper_funcs sti_dvo_encoder_helper_funcs = {
	.dpms = sti_tvout_encoder_dpms,
	.mode_set = sti_tvout_encoder_mode_set,
	.enable = sti_dvo_encoder_enable,
	.disable = sti_dvo_encoder_disable,
};

static struct drm_encoder *
sti_tvout_create_dvo_encoder(struct drm_device *dev,
			     struct sti_tvout *tvout)
{
	struct sti_tvout_encoder *encoder;
	struct drm_encoder *drm_encoder;

	encoder = devm_kzalloc(tvout->dev, sizeof(*encoder), GFP_KERNEL);
	if (!encoder)
		return NULL;

	encoder->tvout = tvout;

	drm_encoder = &encoder->encoder;

	drm_encoder->possible_crtcs = ENCODER_CRTC_MASK;

	drm_encoder_init(dev, drm_encoder,
			 &sti_tvout_encoder_funcs, DRM_MODE_ENCODER_LVDS,
			 NULL);

	drm_encoder_helper_add(drm_encoder, &sti_dvo_encoder_helper_funcs);

	return drm_encoder;
}

static void sti_hda_encoder_enable(struct drm_encoder *encoder)
{
	struct sti_tvout *tvout = to_sti_tvout(encoder);

	tvout_preformatter_set_matrix(tvout, &encoder->crtc->mode);

	tvout_hda_start(tvout, sti_crtc_is_main(encoder->crtc));
}

static void sti_hda_encoder_disable(struct drm_encoder *encoder)
{
	struct sti_tvout *tvout = to_sti_tvout(encoder);

	/* reset VIP register */
	tvout_write(tvout, 0x0, TVO_VIP_HDF);

	/* power down HD DAC */
	tvout_write(tvout, 1, TVO_HD_DAC_CFG_OFF);
}

static const struct drm_encoder_helper_funcs sti_hda_encoder_helper_funcs = {
	.dpms = sti_tvout_encoder_dpms,
	.mode_set = sti_tvout_encoder_mode_set,
	.commit = sti_hda_encoder_enable,
	.disable = sti_hda_encoder_disable,
};

static struct drm_encoder *sti_tvout_create_hda_encoder(struct drm_device *dev,
		struct sti_tvout *tvout)
{
	struct sti_tvout_encoder *encoder;
	struct drm_encoder *drm_encoder;

	encoder = devm_kzalloc(tvout->dev, sizeof(*encoder), GFP_KERNEL);
	if (!encoder)
		return NULL;

	encoder->tvout = tvout;

	drm_encoder = &encoder->encoder;

	drm_encoder->possible_crtcs = ENCODER_CRTC_MASK;

	drm_encoder_init(dev, drm_encoder,
			&sti_tvout_encoder_funcs, DRM_MODE_ENCODER_DAC, NULL);

	drm_encoder_helper_add(drm_encoder, &sti_hda_encoder_helper_funcs);

	return drm_encoder;
}

static void sti_hdmi_encoder_enable(struct drm_encoder *encoder)
{
	struct sti_tvout *tvout = to_sti_tvout(encoder);

	tvout_preformatter_set_matrix(tvout, &encoder->crtc->mode);

	tvout_hdmi_start(tvout, sti_crtc_is_main(encoder->crtc));
}

static void sti_hdmi_encoder_disable(struct drm_encoder *encoder)
{
	struct sti_tvout *tvout = to_sti_tvout(encoder);

	/* reset VIP register */
	tvout_write(tvout, 0x0, TVO_VIP_HDMI);
}

static const struct drm_encoder_helper_funcs sti_hdmi_encoder_helper_funcs = {
	.dpms = sti_tvout_encoder_dpms,
	.mode_set = sti_tvout_encoder_mode_set,
	.commit = sti_hdmi_encoder_enable,
	.disable = sti_hdmi_encoder_disable,
};

static struct drm_encoder *sti_tvout_create_hdmi_encoder(struct drm_device *dev,
		struct sti_tvout *tvout)
{
	struct sti_tvout_encoder *encoder;
	struct drm_encoder *drm_encoder;

	encoder = devm_kzalloc(tvout->dev, sizeof(*encoder), GFP_KERNEL);
	if (!encoder)
		return NULL;

	encoder->tvout = tvout;

	drm_encoder = &encoder->encoder;

	drm_encoder->possible_crtcs = ENCODER_CRTC_MASK;

	drm_encoder_init(dev, drm_encoder,
			&sti_tvout_encoder_funcs, DRM_MODE_ENCODER_TMDS, NULL);

	drm_encoder_helper_add(drm_encoder, &sti_hdmi_encoder_helper_funcs);

	return drm_encoder;
}

static void sti_tvout_create_encoders(struct drm_device *dev,
		struct sti_tvout *tvout)
{
	tvout->hdmi = sti_tvout_create_hdmi_encoder(dev, tvout);
	tvout->hda = sti_tvout_create_hda_encoder(dev, tvout);
	tvout->dvo = sti_tvout_create_dvo_encoder(dev, tvout);

	tvout->hdmi->possible_clones = drm_encoder_mask(tvout->hdmi) |
		drm_encoder_mask(tvout->hda) | drm_encoder_mask(tvout->dvo);
	tvout->hda->possible_clones = drm_encoder_mask(tvout->hdmi) |
		drm_encoder_mask(tvout->hda) | drm_encoder_mask(tvout->dvo);
	tvout->dvo->possible_clones = drm_encoder_mask(tvout->hdmi) |
		drm_encoder_mask(tvout->hda) | drm_encoder_mask(tvout->dvo);
}

static void sti_tvout_destroy_encoders(struct sti_tvout *tvout)
{
	if (tvout->hdmi)
		drm_encoder_cleanup(tvout->hdmi);
	tvout->hdmi = NULL;

	if (tvout->hda)
		drm_encoder_cleanup(tvout->hda);
	tvout->hda = NULL;

	if (tvout->dvo)
		drm_encoder_cleanup(tvout->dvo);
	tvout->dvo = NULL;
}

static int sti_tvout_bind(struct device *dev, struct device *master, void *data)
{
	struct sti_tvout *tvout = dev_get_drvdata(dev);
	struct drm_device *drm_dev = data;

	tvout->drm_dev = drm_dev;

	sti_tvout_create_encoders(drm_dev, tvout);

	return 0;
}

static void sti_tvout_unbind(struct device *dev, struct device *master,
	void *data)
{
	struct sti_tvout *tvout = dev_get_drvdata(dev);

	sti_tvout_destroy_encoders(tvout);
}

static const struct component_ops sti_tvout_ops = {
	.bind	= sti_tvout_bind,
	.unbind	= sti_tvout_unbind,
};

static int sti_tvout_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *node = dev->of_node;
	struct sti_tvout *tvout;
	struct resource *res;

	DRM_INFO("%s\n", __func__);

	if (!node)
		return -ENODEV;

	tvout = devm_kzalloc(dev, sizeof(*tvout), GFP_KERNEL);
	if (!tvout)
		return -ENOMEM;

	tvout->dev = dev;

	/* get memory resources */
	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tvout-reg");
	if (!res) {
		DRM_ERROR("Invalid glue resource\n");
		return -ENOMEM;
	}
	tvout->regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
	if (!tvout->regs)
		return -ENOMEM;

	/* get reset resources */
	tvout->reset = devm_reset_control_get(dev, "tvout");
	/* take tvout out of reset */
	if (!IS_ERR(tvout->reset))
		reset_control_deassert(tvout->reset);

	platform_set_drvdata(pdev, tvout);

	return component_add(dev, &sti_tvout_ops);
}

static int sti_tvout_remove(struct platform_device *pdev)
{
	component_del(&pdev->dev, &sti_tvout_ops);
	return 0;
}

static const struct of_device_id tvout_of_match[] = {
	{ .compatible = "st,stih407-tvout", },
	{ /* end node */ }
};
MODULE_DEVICE_TABLE(of, tvout_of_match);

struct platform_driver sti_tvout_driver = {
	.driver = {
		.name = "sti-tvout",
		.owner = THIS_MODULE,
		.of_match_table = tvout_of_match,
	},
	.probe = sti_tvout_probe,
	.remove = sti_tvout_remove,
};

MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
MODULE_LICENSE("GPL");