summaryrefslogtreecommitdiff
path: root/sound/pci/hda/patch_intelhdmi.c
blob: fcc77fec4487c46b48a9c6115c26e16989380ba4 (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
/*
 *
 *  patch_intelhdmi.c - Patch for Intel HDMI codecs
 *
 *  Copyright(c) 2008 Intel Corporation. All rights reserved.
 *
 *  Authors:
 *  			Jiang Zhe <zhe.jiang@intel.com>
 *  			Wu Fengguang <wfg@linux.intel.com>
 *
 *  Maintained by:
 *  			Wu Fengguang <wfg@linux.intel.com>
 *
 *  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 <linux/init.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <sound/core.h>
#include "hda_codec.h"
#include "hda_local.h"

#define CVT_NID		0x02	/* audio converter */
#define PIN_NID		0x03	/* HDMI output pin */

#define INTEL_HDMI_EVENT_TAG		0x08

struct intel_hdmi_spec {
	struct hda_multi_out multiout;
	struct hda_pcm pcm_rec;
	struct hdmi_eld sink_eld;
};

static struct hda_verb pinout_enable_verb[] = {
	{PIN_NID, AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT},
	{} /* terminator */
};

static struct hda_verb unsolicited_response_verb[] = {
	{PIN_NID, AC_VERB_SET_UNSOLICITED_ENABLE, AC_USRSP_EN |
						  INTEL_HDMI_EVENT_TAG},
	{}
};

static struct hda_verb def_chan_map[] = {
	{CVT_NID, AC_VERB_SET_HDMI_CHAN_SLOT, 0x00},
	{CVT_NID, AC_VERB_SET_HDMI_CHAN_SLOT, 0x11},
	{CVT_NID, AC_VERB_SET_HDMI_CHAN_SLOT, 0x22},
	{CVT_NID, AC_VERB_SET_HDMI_CHAN_SLOT, 0x33},
	{CVT_NID, AC_VERB_SET_HDMI_CHAN_SLOT, 0x44},
	{CVT_NID, AC_VERB_SET_HDMI_CHAN_SLOT, 0x55},
	{CVT_NID, AC_VERB_SET_HDMI_CHAN_SLOT, 0x66},
	{CVT_NID, AC_VERB_SET_HDMI_CHAN_SLOT, 0x77},
	{}
};


struct hdmi_audio_infoframe {
	u8 type; /* 0x84 */
	u8 ver;  /* 0x01 */
	u8 len;  /* 0x0a */

	u8 checksum;	/* PB0 */
	u8 CC02_CT47;	/* CC in bits 0:2, CT in 4:7 */
	u8 SS01_SF24;
	u8 CXT04;
	u8 CA;
	u8 LFEPBL01_LSV36_DM_INH7;
	u8 reserved[5];	/* PB6 - PB10 */
};

/*
 * CEA speaker placement:
 *
 *        FLH       FCH        FRH
 *  FLW    FL  FLC   FC   FRC   FR   FRW
 *
 *                                  LFE
 *                     TC
 *
 *          RL  RLC   RC   RRC   RR
 *
 * The Left/Right Surround channel _notions_ LS/RS in SMPTE 320M corresponds to
 * CEA RL/RR; The SMPTE channel _assignment_ C/LFE is swapped to CEA LFE/FC.
 */
enum cea_speaker_placement {
	FL  = (1 <<  0),	/* Front Left           */
	FC  = (1 <<  1),	/* Front Center         */
	FR  = (1 <<  2),	/* Front Right          */
	FLC = (1 <<  3),	/* Front Left Center    */
	FRC = (1 <<  4),	/* Front Right Center   */
	RL  = (1 <<  5),	/* Rear Left            */
	RC  = (1 <<  6),	/* Rear Center          */
	RR  = (1 <<  7),	/* Rear Right           */
	RLC = (1 <<  8),	/* Rear Left Center     */
	RRC = (1 <<  9),	/* Rear Right Center    */
	LFE = (1 << 10),	/* Low Frequency Effect */
	FLW = (1 << 11),	/* Front Left Wide      */
	FRW = (1 << 12),	/* Front Right Wide     */
	FLH = (1 << 13),	/* Front Left High      */
	FCH = (1 << 14),	/* Front Center High    */
	FRH = (1 << 15),	/* Front Right High     */
	TC  = (1 << 16),	/* Top Center           */
};

/*
 * ELD SA bits in the CEA Speaker Allocation data block
 */
static int eld_speaker_allocation_bits[] = {
	[0] = FL | FR,
	[1] = LFE,
	[2] = FC,
	[3] = RL | RR,
	[4] = RC,
	[5] = FLC | FRC,
	[6] = RLC | RRC,
	/* the following are not defined in ELD yet */
	[7] = FLW | FRW,
	[8] = FLH | FRH,
	[9] = TC,
	[10] = FCH,
};

struct cea_channel_speaker_allocation {
	int ca_index;
	int speakers[8];

	/* derived values, just for convenience */
	int channels;
	int spk_mask;
};

/*
 * This is an ordered list!
 *
 * The preceding ones have better chances to be selected by
 * hdmi_setup_channel_allocation().
 */
static struct cea_channel_speaker_allocation channel_allocations[] = {
/* 			  channel:   8     7    6    5    4     3    2    1  */
{ .ca_index = 0x00,  .speakers = {   0,    0,   0,   0,   0,    0,  FR,  FL } },
				 /* 2.1 */
{ .ca_index = 0x01,  .speakers = {   0,    0,   0,   0,   0,  LFE,  FR,  FL } },
				 /* Dolby Surround */
{ .ca_index = 0x02,  .speakers = {   0,    0,   0,   0,  FC,    0,  FR,  FL } },
{ .ca_index = 0x03,  .speakers = {   0,    0,   0,   0,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x04,  .speakers = {   0,    0,   0,  RC,   0,    0,  FR,  FL } },
{ .ca_index = 0x05,  .speakers = {   0,    0,   0,  RC,   0,  LFE,  FR,  FL } },
{ .ca_index = 0x06,  .speakers = {   0,    0,   0,  RC,  FC,    0,  FR,  FL } },
{ .ca_index = 0x07,  .speakers = {   0,    0,   0,  RC,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x08,  .speakers = {   0,    0,  RR,  RL,   0,    0,  FR,  FL } },
{ .ca_index = 0x09,  .speakers = {   0,    0,  RR,  RL,   0,  LFE,  FR,  FL } },
{ .ca_index = 0x0a,  .speakers = {   0,    0,  RR,  RL,  FC,    0,  FR,  FL } },
				 /* 5.1 */
{ .ca_index = 0x0b,  .speakers = {   0,    0,  RR,  RL,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x0c,  .speakers = {   0,   RC,  RR,  RL,   0,    0,  FR,  FL } },
{ .ca_index = 0x0d,  .speakers = {   0,   RC,  RR,  RL,   0,  LFE,  FR,  FL } },
{ .ca_index = 0x0e,  .speakers = {   0,   RC,  RR,  RL,  FC,    0,  FR,  FL } },
				 /* 6.1 */
{ .ca_index = 0x0f,  .speakers = {   0,   RC,  RR,  RL,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x10,  .speakers = { RRC,  RLC,  RR,  RL,   0,    0,  FR,  FL } },
{ .ca_index = 0x11,  .speakers = { RRC,  RLC,  RR,  RL,   0,  LFE,  FR,  FL } },
{ .ca_index = 0x12,  .speakers = { RRC,  RLC,  RR,  RL,  FC,    0,  FR,  FL } },
				 /* 7.1 */
{ .ca_index = 0x13,  .speakers = { RRC,  RLC,  RR,  RL,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x14,  .speakers = { FRC,  FLC,   0,   0,   0,    0,  FR,  FL } },
{ .ca_index = 0x15,  .speakers = { FRC,  FLC,   0,   0,   0,  LFE,  FR,  FL } },
{ .ca_index = 0x16,  .speakers = { FRC,  FLC,   0,   0,  FC,    0,  FR,  FL } },
{ .ca_index = 0x17,  .speakers = { FRC,  FLC,   0,   0,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x18,  .speakers = { FRC,  FLC,   0,  RC,   0,    0,  FR,  FL } },
{ .ca_index = 0x19,  .speakers = { FRC,  FLC,   0,  RC,   0,  LFE,  FR,  FL } },
{ .ca_index = 0x1a,  .speakers = { FRC,  FLC,   0,  RC,  FC,    0,  FR,  FL } },
{ .ca_index = 0x1b,  .speakers = { FRC,  FLC,   0,  RC,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x1c,  .speakers = { FRC,  FLC,  RR,  RL,   0,    0,  FR,  FL } },
{ .ca_index = 0x1d,  .speakers = { FRC,  FLC,  RR,  RL,   0,  LFE,  FR,  FL } },
{ .ca_index = 0x1e,  .speakers = { FRC,  FLC,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x1f,  .speakers = { FRC,  FLC,  RR,  RL,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x20,  .speakers = {   0,  FCH,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x21,  .speakers = {   0,  FCH,  RR,  RL,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x22,  .speakers = {  TC,    0,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x23,  .speakers = {  TC,    0,  RR,  RL,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x24,  .speakers = { FRH,  FLH,  RR,  RL,   0,    0,  FR,  FL } },
{ .ca_index = 0x25,  .speakers = { FRH,  FLH,  RR,  RL,   0,  LFE,  FR,  FL } },
{ .ca_index = 0x26,  .speakers = { FRW,  FLW,  RR,  RL,   0,    0,  FR,  FL } },
{ .ca_index = 0x27,  .speakers = { FRW,  FLW,  RR,  RL,   0,  LFE,  FR,  FL } },
{ .ca_index = 0x28,  .speakers = {  TC,   RC,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x29,  .speakers = {  TC,   RC,  RR,  RL,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x2a,  .speakers = { FCH,   RC,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x2b,  .speakers = { FCH,   RC,  RR,  RL,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x2c,  .speakers = {  TC,  FCH,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x2d,  .speakers = {  TC,  FCH,  RR,  RL,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x2e,  .speakers = { FRH,  FLH,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x2f,  .speakers = { FRH,  FLH,  RR,  RL,  FC,  LFE,  FR,  FL } },
{ .ca_index = 0x30,  .speakers = { FRW,  FLW,  RR,  RL,  FC,    0,  FR,  FL } },
{ .ca_index = 0x31,  .speakers = { FRW,  FLW,  RR,  RL,  FC,  LFE,  FR,  FL } },
};

/*
 * HDMI routines
 */

#ifdef BE_PARANOID
static void hdmi_get_dip_index(struct hda_codec *codec, hda_nid_t nid,
				int *packet_index, int *byte_index)
{
	int val;

	val = snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_HDMI_DIP_INDEX, 0);

	*packet_index = val >> 5;
	*byte_index = val & 0x1f;
}
#endif

static void hdmi_set_dip_index(struct hda_codec *codec, hda_nid_t nid,
				int packet_index, int byte_index)
{
	int val;

	val = (packet_index << 5) | (byte_index & 0x1f);

	snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_HDMI_DIP_INDEX, val);
}

static void hdmi_write_dip_byte(struct hda_codec *codec, hda_nid_t nid,
				unsigned char val)
{
	snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_HDMI_DIP_DATA, val);
}

static void hdmi_enable_output(struct hda_codec *codec)
{
	/* Unmute */
	if (get_wcaps(codec, PIN_NID) & AC_WCAP_OUT_AMP)
		snd_hda_codec_write(codec, PIN_NID, 0,
				AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE);
	/* Enable pin out */
	snd_hda_sequence_write(codec, pinout_enable_verb);
}

/*
 * Enable Audio InfoFrame Transmission
 */
static void hdmi_start_infoframe_trans(struct hda_codec *codec)
{
	hdmi_set_dip_index(codec, PIN_NID, 0x0, 0x0);
	snd_hda_codec_write(codec, PIN_NID, 0, AC_VERB_SET_HDMI_DIP_XMIT,
						AC_DIPXMIT_BEST);
}

/*
 * Disable Audio InfoFrame Transmission
 */
static void hdmi_stop_infoframe_trans(struct hda_codec *codec)
{
	hdmi_set_dip_index(codec, PIN_NID, 0x0, 0x0);
	snd_hda_codec_write(codec, PIN_NID, 0, AC_VERB_SET_HDMI_DIP_XMIT,
						AC_DIPXMIT_DISABLE);
}

static int hdmi_get_channel_count(struct hda_codec *codec)
{
	return 1 + snd_hda_codec_read(codec, CVT_NID, 0,
					AC_VERB_GET_CVT_CHAN_COUNT, 0);
}

static void hdmi_set_channel_count(struct hda_codec *codec, int chs)
{
	snd_hda_codec_write(codec, CVT_NID, 0,
					AC_VERB_SET_CVT_CHAN_COUNT, chs - 1);

	if (chs != hdmi_get_channel_count(codec))
		snd_printd(KERN_INFO "HDMI channel count: expect %d, get %d\n",
					chs, hdmi_get_channel_count(codec));
}

static void hdmi_debug_channel_mapping(struct hda_codec *codec)
{
#ifdef CONFIG_SND_DEBUG_VERBOSE
	int i;
	int slot;

	for (i = 0; i < 8; i++) {
		slot = snd_hda_codec_read(codec, CVT_NID, 0,
						AC_VERB_GET_HDMI_CHAN_SLOT, i);
		printk(KERN_DEBUG "HDMI: ASP channel %d => slot %d\n",
						slot >> 4, slot & 0x7);
	}
#endif
}

static void hdmi_parse_eld(struct hda_codec *codec)
{
	struct intel_hdmi_spec *spec = codec->spec;
	struct hdmi_eld *eld = &spec->sink_eld;

	if (!snd_hdmi_get_eld(eld, codec, PIN_NID))
		snd_hdmi_show_eld(eld);
}


/*
 * Audio InfoFrame routines
 */

static void hdmi_debug_dip_size(struct hda_codec *codec)
{
#ifdef CONFIG_SND_DEBUG_VERBOSE
	int i;
	int size;

	size = snd_hdmi_get_eld_size(codec, PIN_NID);
	printk(KERN_DEBUG "HDMI: ELD buf size is %d\n", size);

	for (i = 0; i < 8; i++) {
		size = snd_hda_codec_read(codec, PIN_NID, 0,
						AC_VERB_GET_HDMI_DIP_SIZE, i);
		printk(KERN_DEBUG "HDMI: DIP GP[%d] buf size is %d\n", i, size);
	}
#endif
}

static void hdmi_clear_dip_buffers(struct hda_codec *codec)
{
#ifdef BE_PARANOID
	int i, j;
	int size;
	int pi, bi;
	for (i = 0; i < 8; i++) {
		size = snd_hda_codec_read(codec, PIN_NID, 0,
						AC_VERB_GET_HDMI_DIP_SIZE, i);
		if (size == 0)
			continue;

		hdmi_set_dip_index(codec, PIN_NID, i, 0x0);
		for (j = 1; j < 1000; j++) {
			hdmi_write_dip_byte(codec, PIN_NID, 0x0);
			hdmi_get_dip_index(codec, PIN_NID, &pi, &bi);
			if (pi != i)
				snd_printd(KERN_INFO "dip index %d: %d != %d\n",
						bi, pi, i);
			if (bi == 0) /* byte index wrapped around */
				break;
		}
		snd_printd(KERN_INFO
			"HDMI: DIP GP[%d] buf reported size=%d, written=%d\n",
			i, size, j);
	}
#endif
}

static void hdmi_fill_audio_infoframe(struct hda_codec *codec,
					struct hdmi_audio_infoframe *ai)
{
	u8 *params = (u8 *)ai;
	u8 sum = 0;
	int i;

	hdmi_debug_dip_size(codec);
	hdmi_clear_dip_buffers(codec); /* be paranoid */

	for (i = 0; i < sizeof(ai); i++)
		sum += params[i];
	ai->checksum = - sum;

	hdmi_set_dip_index(codec, PIN_NID, 0x0, 0x0);
	for (i = 0; i < sizeof(ai); i++)
		hdmi_write_dip_byte(codec, PIN_NID, params[i]);
}

/*
 * Compute derived values in channel_allocations[].
 */
static void init_channel_allocations(void)
{
	int i, j;
	struct cea_channel_speaker_allocation *p;

	for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
		p = channel_allocations + i;
		p->channels = 0;
		p->spk_mask = 0;
		for (j = 0; j < ARRAY_SIZE(p->speakers); j++)
			if (p->speakers[j]) {
				p->channels++;
				p->spk_mask |= p->speakers[j];
			}
	}
}

/*
 * The transformation takes two steps:
 *
 * 	eld->spk_alloc => (eld_speaker_allocation_bits[]) => spk_mask
 * 	      spk_mask => (channel_allocations[])         => ai->CA
 *
 * TODO: it could select the wrong CA from multiple candidates.
*/
static int hdmi_setup_channel_allocation(struct hda_codec *codec,
					 struct hdmi_audio_infoframe *ai)
{
	struct intel_hdmi_spec *spec = codec->spec;
	struct hdmi_eld *eld = &spec->sink_eld;
	int i;
	int spk_mask = 0;
	int channels = 1 + (ai->CC02_CT47 & 0x7);
	char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];

	/*
	 * CA defaults to 0 for basic stereo audio
	 */
	if (channels <= 2)
		return 0;

	/*
	 * HDMI sink's ELD info cannot always be retrieved for now, e.g.
	 * in console or for audio devices. Assume the highest speakers
	 * configuration, to _not_ prohibit multi-channel audio playback.
	 */
	if (!eld->spk_alloc)
		eld->spk_alloc = 0xffff;

	/*
	 * expand ELD's speaker allocation mask
	 *
	 * ELD tells the speaker mask in a compact(paired) form,
	 * expand ELD's notions to match the ones used by Audio InfoFrame.
	 */
	for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) {
		if (eld->spk_alloc & (1 << i))
			spk_mask |= eld_speaker_allocation_bits[i];
	}

	/* search for the first working match in the CA table */
	for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
		if (channels == channel_allocations[i].channels &&
		    (spk_mask & channel_allocations[i].spk_mask) ==
				channel_allocations[i].spk_mask) {
			ai->CA = channel_allocations[i].ca_index;
			break;
		}
	}

	snd_print_channel_allocation(eld->spk_alloc, buf, sizeof(buf));
	snd_printdd(KERN_INFO
			"HDMI: select CA 0x%x for %d-channel allocation: %s\n",
			ai->CA, channels, buf);

	return ai->CA;
}

static void hdmi_setup_channel_mapping(struct hda_codec *codec,
					struct hdmi_audio_infoframe *ai)
{
	if (!ai->CA)
		return;

	/*
	 * TODO: adjust channel mapping if necessary
	 * ALSA sequence is front/surr/clfe/side?
	 */

	snd_hda_sequence_write(codec, def_chan_map);
	hdmi_debug_channel_mapping(codec);
}


static void hdmi_setup_audio_infoframe(struct hda_codec *codec,
					struct snd_pcm_substream *substream)
{
	struct hdmi_audio_infoframe ai = {
		.type		= 0x84,
		.ver		= 0x01,
		.len		= 0x0a,
		.CC02_CT47	= substream->runtime->channels - 1,
	};

	hdmi_setup_channel_allocation(codec, &ai);
	hdmi_setup_channel_mapping(codec, &ai);

	hdmi_fill_audio_infoframe(codec, &ai);
	hdmi_start_infoframe_trans(codec);
}


/*
 * Unsolicited events
 */

static void hdmi_intrinsic_event(struct hda_codec *codec, unsigned int res)
{
	int pind = !!(res & AC_UNSOL_RES_PD);
	int eldv = !!(res & AC_UNSOL_RES_ELDV);

	printk(KERN_INFO
		"HDMI hot plug event: Presence_Detect=%d ELD_Valid=%d\n",
		pind, eldv);

	if (pind && eldv) {
		hdmi_parse_eld(codec);
		/* TODO: do real things about ELD */
	}
}

static void hdmi_non_intrinsic_event(struct hda_codec *codec, unsigned int res)
{
	int subtag = (res & AC_UNSOL_RES_SUBTAG) >> AC_UNSOL_RES_SUBTAG_SHIFT;
	int cp_state = !!(res & AC_UNSOL_RES_CP_STATE);
	int cp_ready = !!(res & AC_UNSOL_RES_CP_READY);

	printk(KERN_INFO
		"HDMI content protection event: SUBTAG=0x%x CP_STATE=%d CP_READY=%d\n",
		subtag,
		cp_state,
		cp_ready);

	/* TODO */
	if (cp_state)
		;
	if (cp_ready)
		;
}


static void intel_hdmi_unsol_event(struct hda_codec *codec, unsigned int res)
{
	int tag = res >> AC_UNSOL_RES_TAG_SHIFT;
	int subtag = (res & AC_UNSOL_RES_SUBTAG) >> AC_UNSOL_RES_SUBTAG_SHIFT;

	if (tag != INTEL_HDMI_EVENT_TAG) {
		snd_printd(KERN_INFO "Unexpected HDMI event tag 0x%x\n", tag);
		return;
	}

	if (subtag == 0)
		hdmi_intrinsic_event(codec, res);
	else
		hdmi_non_intrinsic_event(codec, res);
}

/*
 * Callbacks
 */

static int intel_hdmi_playback_pcm_open(struct hda_pcm_stream *hinfo,
					struct hda_codec *codec,
					struct snd_pcm_substream *substream)
{
	struct intel_hdmi_spec *spec = codec->spec;

	return snd_hda_multi_out_dig_open(codec, &spec->multiout);
}

static int intel_hdmi_playback_pcm_close(struct hda_pcm_stream *hinfo,
					 struct hda_codec *codec,
					 struct snd_pcm_substream *substream)
{
	struct intel_hdmi_spec *spec = codec->spec;

	hdmi_stop_infoframe_trans(codec);

	return snd_hda_multi_out_dig_close(codec, &spec->multiout);
}

static int intel_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
					   struct hda_codec *codec,
					   unsigned int stream_tag,
					   unsigned int format,
					   struct snd_pcm_substream *substream)
{
	struct intel_hdmi_spec *spec = codec->spec;

	snd_hda_multi_out_dig_prepare(codec, &spec->multiout, stream_tag,
					     format, substream);

	hdmi_set_channel_count(codec, substream->runtime->channels);

	hdmi_setup_audio_infoframe(codec, substream);

	return 0;
}

static struct hda_pcm_stream intel_hdmi_pcm_playback = {
	.substreams = 1,
	.channels_min = 2,
	.channels_max = 8,
	.nid = CVT_NID, /* NID to query formats and rates and setup streams */
	.ops = {
		.open    = intel_hdmi_playback_pcm_open,
		.close   = intel_hdmi_playback_pcm_close,
		.prepare = intel_hdmi_playback_pcm_prepare
	},
};

static int intel_hdmi_build_pcms(struct hda_codec *codec)
{
	struct intel_hdmi_spec *spec = codec->spec;
	struct hda_pcm *info = &spec->pcm_rec;

	codec->num_pcms = 1;
	codec->pcm_info = info;

	info->name = "INTEL HDMI";
	info->pcm_type = HDA_PCM_TYPE_HDMI;
	info->stream[SNDRV_PCM_STREAM_PLAYBACK] = intel_hdmi_pcm_playback;

	return 0;
}

static int intel_hdmi_build_controls(struct hda_codec *codec)
{
	struct intel_hdmi_spec *spec = codec->spec;
	int err;

	err = snd_hda_create_spdif_out_ctls(codec, spec->multiout.dig_out_nid);
	if (err < 0)
		return err;

	return 0;
}

static int intel_hdmi_init(struct hda_codec *codec)
{
	hdmi_enable_output(codec);

	snd_hda_sequence_write(codec, unsolicited_response_verb);

	return 0;
}

static void intel_hdmi_free(struct hda_codec *codec)
{
	struct intel_hdmi_spec *spec = codec->spec;

	snd_hda_eld_proc_free(codec, &spec->sink_eld);
	kfree(spec);
}

static struct hda_codec_ops intel_hdmi_patch_ops = {
	.init			= intel_hdmi_init,
	.free			= intel_hdmi_free,
	.build_pcms		= intel_hdmi_build_pcms,
	.build_controls 	= intel_hdmi_build_controls,
	.unsol_event		= intel_hdmi_unsol_event,
};

static int patch_intel_hdmi(struct hda_codec *codec)
{
	struct intel_hdmi_spec *spec;

	spec = kzalloc(sizeof(*spec), GFP_KERNEL);
	if (spec == NULL)
		return -ENOMEM;

	spec->multiout.num_dacs = 0;	  /* no analog */
	spec->multiout.max_channels = 8;
	spec->multiout.dig_out_nid = CVT_NID;

	codec->spec = spec;
	codec->patch_ops = intel_hdmi_patch_ops;

	snd_hda_eld_proc_new(codec, &spec->sink_eld);

	init_channel_allocations();

	return 0;
}

static struct hda_codec_preset snd_hda_preset_intelhdmi[] = {
	{ .id = 0x808629fb, .name = "G45 DEVCL",  .patch = patch_intel_hdmi },
	{ .id = 0x80862801, .name = "G45 DEVBLC", .patch = patch_intel_hdmi },
	{ .id = 0x80862802, .name = "G45 DEVCTG", .patch = patch_intel_hdmi },
	{ .id = 0x80862803, .name = "G45 DEVELK", .patch = patch_intel_hdmi },
	{ .id = 0x80862804, .name = "G45 DEVIBX", .patch = patch_intel_hdmi },
	{ .id = 0x10951392, .name = "SiI1392 HDMI",     .patch = patch_intel_hdmi },
	{} /* terminator */
};

MODULE_ALIAS("snd-hda-codec-id:808629fb");
MODULE_ALIAS("snd-hda-codec-id:80862801");
MODULE_ALIAS("snd-hda-codec-id:80862802");
MODULE_ALIAS("snd-hda-codec-id:80862803");
MODULE_ALIAS("snd-hda-codec-id:80862804");
MODULE_ALIAS("snd-hda-codec-id:10951392");

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Intel HDMI HD-audio codec");

static struct hda_codec_preset_list intel_list = {
	.preset = snd_hda_preset_intelhdmi,
	.owner = THIS_MODULE,
};

static int __init patch_intelhdmi_init(void)
{
	return snd_hda_add_codec_preset(&intel_list);
}

static void __exit patch_intelhdmi_exit(void)
{
	snd_hda_delete_codec_preset(&intel_list);
}

module_init(patch_intelhdmi_init)
module_exit(patch_intelhdmi_exit)