dc0129b75a4b11d380cd8aadb5060784b6421bf1
[sfrench/cifs-2.6.git] / sound / soc / codecs / hdac_hdmi.c
1 /*
2  *  hdac_hdmi.c - ASoc HDA-HDMI codec driver for Intel platforms
3  *
4  *  Copyright (C) 2014-2015 Intel Corp
5  *  Author: Samreen Nilofer <samreen.nilofer@intel.com>
6  *          Subhransu S. Prusty <subhransu.s.prusty@intel.com>
7  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8  *
9  *  This program is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License as published by
11  *  the Free Software Foundation; version 2 of the License.
12  *
13  *  This program is distributed in the hope that it will be useful, but
14  *  WITHOUT ANY WARRANTY; without even the implied warranty of
15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  *  General Public License for more details.
17  *
18  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
19  */
20 #include <linux/init.h>
21 #include <linux/delay.h>
22 #include <linux/module.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/hdmi.h>
25 #include <drm/drm_edid.h>
26 #include <sound/pcm_params.h>
27 #include <sound/jack.h>
28 #include <sound/soc.h>
29 #include <sound/hdaudio_ext.h>
30 #include <sound/hda_i915.h>
31 #include <sound/pcm_drm_eld.h>
32 #include <sound/hda_chmap.h>
33 #include "../../hda/local.h"
34 #include "hdac_hdmi.h"
35
36 #define NAME_SIZE       32
37
38 #define AMP_OUT_MUTE            0xb080
39 #define AMP_OUT_UNMUTE          0xb000
40 #define PIN_OUT                 (AC_PINCTL_OUT_EN)
41
42 #define HDA_MAX_CONNECTIONS     32
43
44 #define HDA_MAX_CVTS            3
45
46 #define ELD_MAX_SIZE    256
47 #define ELD_FIXED_BYTES 20
48
49 struct hdac_hdmi_cvt_params {
50         unsigned int channels_min;
51         unsigned int channels_max;
52         u32 rates;
53         u64 formats;
54         unsigned int maxbps;
55 };
56
57 struct hdac_hdmi_cvt {
58         struct list_head head;
59         hda_nid_t nid;
60         const char *name;
61         struct hdac_hdmi_cvt_params params;
62 };
63
64 /* Currently only spk_alloc, more to be added */
65 struct hdac_hdmi_parsed_eld {
66         u8 spk_alloc;
67 };
68
69 struct hdac_hdmi_eld {
70         bool    monitor_present;
71         bool    eld_valid;
72         int     eld_size;
73         char    eld_buffer[ELD_MAX_SIZE];
74         struct  hdac_hdmi_parsed_eld info;
75 };
76
77 struct hdac_hdmi_pin {
78         struct list_head head;
79         hda_nid_t nid;
80         int num_mux_nids;
81         hda_nid_t mux_nids[HDA_MAX_CONNECTIONS];
82         struct hdac_hdmi_eld eld;
83         struct hdac_ext_device *edev;
84         int repoll_count;
85         struct delayed_work work;
86         struct mutex lock;
87         bool chmap_set;
88         unsigned char chmap[8]; /* ALSA API channel-map */
89         int channels; /* current number of channels */
90 };
91
92 struct hdac_hdmi_pcm {
93         struct list_head head;
94         int pcm_id;
95         struct hdac_hdmi_pin *pin;
96         struct hdac_hdmi_cvt *cvt;
97         struct snd_jack *jack;
98 };
99
100 struct hdac_hdmi_dai_pin_map {
101         int dai_id;
102         struct hdac_hdmi_pin *pin;
103         struct hdac_hdmi_cvt *cvt;
104 };
105
106 struct hdac_hdmi_priv {
107         struct hdac_hdmi_dai_pin_map dai_map[HDA_MAX_CVTS];
108         struct list_head pin_list;
109         struct list_head cvt_list;
110         struct list_head pcm_list;
111         int num_pin;
112         int num_cvt;
113         struct mutex pin_mutex;
114         struct hdac_chmap chmap;
115 };
116
117 static struct hdac_hdmi_pcm *get_hdmi_pcm_from_id(struct hdac_hdmi_priv *hdmi,
118                                                 int pcm_idx)
119 {
120         struct hdac_hdmi_pcm *pcm;
121
122         list_for_each_entry(pcm, &hdmi->pcm_list, head) {
123                 if (pcm->pcm_id == pcm_idx)
124                         return pcm;
125         }
126
127         return NULL;
128 }
129
130 static inline struct hdac_ext_device *to_hda_ext_device(struct device *dev)
131 {
132         struct hdac_device *hdac = dev_to_hdac_dev(dev);
133
134         return to_ehdac_device(hdac);
135 }
136
137 static unsigned int sad_format(const u8 *sad)
138 {
139         return ((sad[0] >> 0x3) & 0x1f);
140 }
141
142 static unsigned int sad_sample_bits_lpcm(const u8 *sad)
143 {
144         return (sad[2] & 7);
145 }
146
147 static int hdac_hdmi_eld_limit_formats(struct snd_pcm_runtime *runtime,
148                                                 void *eld)
149 {
150         u64 formats = SNDRV_PCM_FMTBIT_S16;
151         int i;
152         const u8 *sad, *eld_buf = eld;
153
154         sad = drm_eld_sad(eld_buf);
155         if (!sad)
156                 goto format_constraint;
157
158         for (i = drm_eld_sad_count(eld_buf); i > 0; i--, sad += 3) {
159                 if (sad_format(sad) == 1) { /* AUDIO_CODING_TYPE_LPCM */
160
161                         /*
162                          * the controller support 20 and 24 bits in 32 bit
163                          * container so we set S32
164                          */
165                         if (sad_sample_bits_lpcm(sad) & 0x6)
166                                 formats |= SNDRV_PCM_FMTBIT_S32;
167                 }
168         }
169
170 format_constraint:
171         return snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT,
172                                 formats);
173
174 }
175
176  /* HDMI ELD routines */
177 static unsigned int hdac_hdmi_get_eld_data(struct hdac_device *codec,
178                                 hda_nid_t nid, int byte_index)
179 {
180         unsigned int val;
181
182         val = snd_hdac_codec_read(codec, nid, 0, AC_VERB_GET_HDMI_ELDD,
183                                                         byte_index);
184
185         dev_dbg(&codec->dev, "HDMI: ELD data byte %d: 0x%x\n",
186                                         byte_index, val);
187
188         return val;
189 }
190
191 static int hdac_hdmi_get_eld_size(struct hdac_device *codec, hda_nid_t nid)
192 {
193         return snd_hdac_codec_read(codec, nid, 0, AC_VERB_GET_HDMI_DIP_SIZE,
194                                                  AC_DIPSIZE_ELD_BUF);
195 }
196
197 /*
198  * This function queries the ELD size and ELD data and fills in the buffer
199  * passed by user
200  */
201 static int hdac_hdmi_get_eld(struct hdac_device *codec, hda_nid_t nid,
202                              unsigned char *buf, int *eld_size)
203 {
204         int i, size, ret = 0;
205
206         /*
207          * ELD size is initialized to zero in caller function. If no errors and
208          * ELD is valid, actual eld_size is assigned.
209          */
210
211         size = hdac_hdmi_get_eld_size(codec, nid);
212         if (size < ELD_FIXED_BYTES || size > ELD_MAX_SIZE) {
213                 dev_err(&codec->dev, "HDMI: invalid ELD buf size %d\n", size);
214                 return -ERANGE;
215         }
216
217         /* set ELD buffer */
218         for (i = 0; i < size; i++) {
219                 unsigned int val = hdac_hdmi_get_eld_data(codec, nid, i);
220                 /*
221                  * Graphics driver might be writing to ELD buffer right now.
222                  * Just abort. The caller will repoll after a while.
223                  */
224                 if (!(val & AC_ELDD_ELD_VALID)) {
225                         dev_err(&codec->dev,
226                                 "HDMI: invalid ELD data byte %d\n", i);
227                         ret = -EINVAL;
228                         goto error;
229                 }
230                 val &= AC_ELDD_ELD_DATA;
231                 /*
232                  * The first byte cannot be zero. This can happen on some DVI
233                  * connections. Some Intel chips may also need some 250ms delay
234                  * to return non-zero ELD data, even when the graphics driver
235                  * correctly writes ELD content before setting ELD_valid bit.
236                  */
237                 if (!val && !i) {
238                         dev_err(&codec->dev, "HDMI: 0 ELD data\n");
239                         ret = -EINVAL;
240                         goto error;
241                 }
242                 buf[i] = val;
243         }
244
245         *eld_size = size;
246 error:
247         return ret;
248 }
249
250 static int hdac_hdmi_setup_stream(struct hdac_ext_device *hdac,
251                                 hda_nid_t cvt_nid, hda_nid_t pin_nid,
252                                 u32 stream_tag, int format)
253 {
254         unsigned int val;
255
256         dev_dbg(&hdac->hdac.dev, "cvt nid %d pnid %d stream %d format 0x%x\n",
257                         cvt_nid, pin_nid, stream_tag, format);
258
259         val = (stream_tag << 4);
260
261         snd_hdac_codec_write(&hdac->hdac, cvt_nid, 0,
262                                 AC_VERB_SET_CHANNEL_STREAMID, val);
263         snd_hdac_codec_write(&hdac->hdac, cvt_nid, 0,
264                                 AC_VERB_SET_STREAM_FORMAT, format);
265
266         return 0;
267 }
268
269 static void
270 hdac_hdmi_set_dip_index(struct hdac_ext_device *hdac, hda_nid_t pin_nid,
271                                 int packet_index, int byte_index)
272 {
273         int val;
274
275         val = (packet_index << 5) | (byte_index & 0x1f);
276
277         snd_hdac_codec_write(&hdac->hdac, pin_nid, 0,
278                                 AC_VERB_SET_HDMI_DIP_INDEX, val);
279 }
280
281 struct dp_audio_infoframe {
282         u8 type; /* 0x84 */
283         u8 len;  /* 0x1b */
284         u8 ver;  /* 0x11 << 2 */
285
286         u8 CC02_CT47;   /* match with HDMI infoframe from this on */
287         u8 SS01_SF24;
288         u8 CXT04;
289         u8 CA;
290         u8 LFEPBL01_LSV36_DM_INH7;
291 };
292
293 static int hdac_hdmi_setup_audio_infoframe(struct hdac_ext_device *hdac,
294                                 hda_nid_t cvt_nid, hda_nid_t pin_nid)
295 {
296         uint8_t buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AUDIO_INFOFRAME_SIZE];
297         struct hdmi_audio_infoframe frame;
298         struct dp_audio_infoframe dp_ai;
299         struct hdac_hdmi_priv *hdmi = hdac->private_data;
300         struct hdac_hdmi_pin *pin;
301         u8 *dip;
302         int ret;
303         int i;
304         const u8 *eld_buf;
305         u8 conn_type;
306         int channels, ca;
307
308         list_for_each_entry(pin, &hdmi->pin_list, head) {
309                 if (pin->nid == pin_nid)
310                         break;
311         }
312
313         ca = snd_hdac_channel_allocation(&hdac->hdac, pin->eld.info.spk_alloc,
314                         pin->channels, pin->chmap_set, true, pin->chmap);
315
316         channels = snd_hdac_get_active_channels(ca);
317         hdmi->chmap.ops.set_channel_count(&hdac->hdac, cvt_nid, channels);
318
319         snd_hdac_setup_channel_mapping(&hdmi->chmap, pin->nid, false, ca,
320                                 pin->channels, pin->chmap, pin->chmap_set);
321
322         eld_buf = pin->eld.eld_buffer;
323         conn_type = drm_eld_get_conn_type(eld_buf);
324
325         switch (conn_type) {
326         case DRM_ELD_CONN_TYPE_HDMI:
327                 hdmi_audio_infoframe_init(&frame);
328
329                 frame.channels = channels;
330                 frame.channel_allocation = ca;
331
332                 ret = hdmi_audio_infoframe_pack(&frame, buffer, sizeof(buffer));
333                 if (ret < 0)
334                         return ret;
335
336                 break;
337
338         case DRM_ELD_CONN_TYPE_DP:
339                 memset(&dp_ai, 0, sizeof(dp_ai));
340                 dp_ai.type      = 0x84;
341                 dp_ai.len       = 0x1b;
342                 dp_ai.ver       = 0x11 << 2;
343                 dp_ai.CC02_CT47 = channels - 1;
344                 dp_ai.CA        = ca;
345
346                 dip = (u8 *)&dp_ai;
347                 break;
348
349         default:
350                 dev_err(&hdac->hdac.dev, "Invalid connection type: %d\n",
351                                                 conn_type);
352                 return -EIO;
353         }
354
355         /* stop infoframe transmission */
356         hdac_hdmi_set_dip_index(hdac, pin_nid, 0x0, 0x0);
357         snd_hdac_codec_write(&hdac->hdac, pin_nid, 0,
358                         AC_VERB_SET_HDMI_DIP_XMIT, AC_DIPXMIT_DISABLE);
359
360
361         /*  Fill infoframe. Index auto-incremented */
362         hdac_hdmi_set_dip_index(hdac, pin_nid, 0x0, 0x0);
363         if (conn_type == DRM_ELD_CONN_TYPE_HDMI) {
364                 for (i = 0; i < sizeof(buffer); i++)
365                         snd_hdac_codec_write(&hdac->hdac, pin_nid, 0,
366                                 AC_VERB_SET_HDMI_DIP_DATA, buffer[i]);
367         } else {
368                 for (i = 0; i < sizeof(dp_ai); i++)
369                         snd_hdac_codec_write(&hdac->hdac, pin_nid, 0,
370                                 AC_VERB_SET_HDMI_DIP_DATA, dip[i]);
371         }
372
373         /* Start infoframe */
374         hdac_hdmi_set_dip_index(hdac, pin_nid, 0x0, 0x0);
375         snd_hdac_codec_write(&hdac->hdac, pin_nid, 0,
376                         AC_VERB_SET_HDMI_DIP_XMIT, AC_DIPXMIT_BEST);
377
378         return 0;
379 }
380
381 static void hdac_hdmi_set_power_state(struct hdac_ext_device *edev,
382                 struct hdac_hdmi_dai_pin_map *dai_map, unsigned int pwr_state)
383 {
384         /* Power up pin widget */
385         if (!snd_hdac_check_power_state(&edev->hdac, dai_map->pin->nid,
386                                                 pwr_state))
387                 snd_hdac_codec_write(&edev->hdac, dai_map->pin->nid, 0,
388                         AC_VERB_SET_POWER_STATE, pwr_state);
389
390         /* Power up converter */
391         if (!snd_hdac_check_power_state(&edev->hdac, dai_map->cvt->nid,
392                                                 pwr_state))
393                 snd_hdac_codec_write(&edev->hdac, dai_map->cvt->nid, 0,
394                         AC_VERB_SET_POWER_STATE, pwr_state);
395 }
396
397 static int hdac_hdmi_playback_prepare(struct snd_pcm_substream *substream,
398                                 struct snd_soc_dai *dai)
399 {
400         struct hdac_ext_device *hdac = snd_soc_dai_get_drvdata(dai);
401         struct hdac_hdmi_priv *hdmi = hdac->private_data;
402         struct hdac_hdmi_dai_pin_map *dai_map;
403         struct hdac_hdmi_pin *pin;
404         struct hdac_ext_dma_params *dd;
405         int ret;
406
407         dai_map = &hdmi->dai_map[dai->id];
408         pin = dai_map->pin;
409
410         dd = (struct hdac_ext_dma_params *)snd_soc_dai_get_dma_data(dai, substream);
411         dev_dbg(&hdac->hdac.dev, "stream tag from cpu dai %d format in cvt 0x%x\n",
412                         dd->stream_tag, dd->format);
413
414         mutex_lock(&pin->lock);
415         pin->channels = substream->runtime->channels;
416
417         ret = hdac_hdmi_setup_audio_infoframe(hdac, dai_map->cvt->nid,
418                                                 dai_map->pin->nid);
419         mutex_unlock(&pin->lock);
420         if (ret < 0)
421                 return ret;
422
423         return hdac_hdmi_setup_stream(hdac, dai_map->cvt->nid,
424                         dai_map->pin->nid, dd->stream_tag, dd->format);
425 }
426
427 static int hdac_hdmi_set_hw_params(struct snd_pcm_substream *substream,
428         struct snd_pcm_hw_params *hparams, struct snd_soc_dai *dai)
429 {
430         struct hdac_ext_device *hdac = snd_soc_dai_get_drvdata(dai);
431         struct hdac_hdmi_priv *hdmi = hdac->private_data;
432         struct hdac_hdmi_dai_pin_map *dai_map;
433         struct hdac_hdmi_pin *pin;
434         struct hdac_ext_dma_params *dd;
435
436         dai_map = &hdmi->dai_map[dai->id];
437         pin = dai_map->pin;
438
439         if (!pin)
440                 return -ENODEV;
441
442         if ((!pin->eld.monitor_present) || (!pin->eld.eld_valid)) {
443                 dev_err(&hdac->hdac.dev, "device is not configured for this pin: %d\n",
444                                                                 pin->nid);
445                 return -ENODEV;
446         }
447
448         dd = snd_soc_dai_get_dma_data(dai, substream);
449         if (!dd) {
450                 dd = kzalloc(sizeof(*dd), GFP_KERNEL);
451                 if (!dd)
452                         return -ENOMEM;
453         }
454
455         dd->format = snd_hdac_calc_stream_format(params_rate(hparams),
456                         params_channels(hparams), params_format(hparams),
457                         24, 0);
458
459         snd_soc_dai_set_dma_data(dai, substream, (void *)dd);
460
461         return 0;
462 }
463
464 static int hdac_hdmi_playback_cleanup(struct snd_pcm_substream *substream,
465                 struct snd_soc_dai *dai)
466 {
467         struct hdac_ext_device *edev = snd_soc_dai_get_drvdata(dai);
468         struct hdac_ext_dma_params *dd;
469         struct hdac_hdmi_priv *hdmi = edev->private_data;
470         struct hdac_hdmi_dai_pin_map *dai_map;
471
472         dai_map = &hdmi->dai_map[dai->id];
473
474         dd = (struct hdac_ext_dma_params *)snd_soc_dai_get_dma_data(dai, substream);
475
476         if (dd) {
477                 snd_soc_dai_set_dma_data(dai, substream, NULL);
478                 kfree(dd);
479         }
480
481         return 0;
482 }
483
484 static void hdac_hdmi_enable_cvt(struct hdac_ext_device *edev,
485                 struct hdac_hdmi_dai_pin_map *dai_map)
486 {
487         /* Enable transmission */
488         snd_hdac_codec_write(&edev->hdac, dai_map->cvt->nid, 0,
489                         AC_VERB_SET_DIGI_CONVERT_1, 1);
490
491         /* Category Code (CC) to zero */
492         snd_hdac_codec_write(&edev->hdac, dai_map->cvt->nid, 0,
493                         AC_VERB_SET_DIGI_CONVERT_2, 0);
494 }
495
496 static int hdac_hdmi_enable_pin(struct hdac_ext_device *hdac,
497                 struct hdac_hdmi_dai_pin_map *dai_map)
498 {
499         int mux_idx;
500         struct hdac_hdmi_pin *pin = dai_map->pin;
501
502         for (mux_idx = 0; mux_idx < pin->num_mux_nids; mux_idx++) {
503                 if (pin->mux_nids[mux_idx] == dai_map->cvt->nid) {
504                         snd_hdac_codec_write(&hdac->hdac, pin->nid, 0,
505                                         AC_VERB_SET_CONNECT_SEL, mux_idx);
506                         break;
507                 }
508         }
509
510         if (mux_idx == pin->num_mux_nids)
511                 return -EIO;
512
513         /* Enable out path for this pin widget */
514         snd_hdac_codec_write(&hdac->hdac, pin->nid, 0,
515                         AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_OUT);
516
517         hdac_hdmi_set_power_state(hdac, dai_map, AC_PWRST_D0);
518
519         snd_hdac_codec_write(&hdac->hdac, pin->nid, 0,
520                         AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE);
521
522         return 0;
523 }
524
525 static int hdac_hdmi_query_pin_connlist(struct hdac_ext_device *hdac,
526                                         struct hdac_hdmi_pin *pin)
527 {
528         if (!(get_wcaps(&hdac->hdac, pin->nid) & AC_WCAP_CONN_LIST)) {
529                 dev_warn(&hdac->hdac.dev,
530                         "HDMI: pin %d wcaps %#x does not support connection list\n",
531                         pin->nid, get_wcaps(&hdac->hdac, pin->nid));
532                 return -EINVAL;
533         }
534
535         pin->num_mux_nids = snd_hdac_get_connections(&hdac->hdac, pin->nid,
536                         pin->mux_nids, HDA_MAX_CONNECTIONS);
537         if (pin->num_mux_nids == 0)
538                 dev_warn(&hdac->hdac.dev, "No connections found for pin: %d\n",
539                                                                 pin->nid);
540
541         dev_dbg(&hdac->hdac.dev, "num_mux_nids %d for pin: %d\n",
542                         pin->num_mux_nids, pin->nid);
543
544         return pin->num_mux_nids;
545 }
546
547 /*
548  * Query pcm list and return pin widget to which stream is routed.
549  *
550  * Also query connection list of the pin, to validate the cvt to pin map.
551  *
552  * Same stream rendering to multiple pins simultaneously can be done
553  * possibly, but not supported for now in driver. So return the first pin
554  * connected.
555  */
556 static struct hdac_hdmi_pin *hdac_hdmi_get_pin_from_cvt(
557                         struct hdac_ext_device *edev,
558                         struct hdac_hdmi_priv *hdmi,
559                         struct hdac_hdmi_cvt *cvt)
560 {
561         struct hdac_hdmi_pcm *pcm;
562         struct hdac_hdmi_pin *pin = NULL;
563         int ret, i;
564
565         list_for_each_entry(pcm, &hdmi->pcm_list, head) {
566                 if (pcm->cvt == cvt) {
567                         pin = pcm->pin;
568                         break;
569                 }
570         }
571
572         if (pin) {
573                 ret = hdac_hdmi_query_pin_connlist(edev, pin);
574                 if (ret < 0)
575                         return NULL;
576
577                 for (i = 0; i < pin->num_mux_nids; i++) {
578                         if (pin->mux_nids[i] == cvt->nid)
579                                 return pin;
580                 }
581         }
582
583         return NULL;
584 }
585
586 /*
587  * This tries to get a valid pin and set the HW constraints based on the
588  * ELD. Even if a valid pin is not found return success so that device open
589  * doesn't fail.
590  */
591 static int hdac_hdmi_pcm_open(struct snd_pcm_substream *substream,
592                         struct snd_soc_dai *dai)
593 {
594         struct hdac_ext_device *hdac = snd_soc_dai_get_drvdata(dai);
595         struct hdac_hdmi_priv *hdmi = hdac->private_data;
596         struct hdac_hdmi_dai_pin_map *dai_map;
597         struct hdac_hdmi_cvt *cvt;
598         struct hdac_hdmi_pin *pin;
599         int ret;
600
601         dai_map = &hdmi->dai_map[dai->id];
602
603         cvt = dai_map->cvt;
604         pin = hdac_hdmi_get_pin_from_cvt(hdac, hdmi, cvt);
605
606         /*
607          * To make PA and other userland happy.
608          * userland scans devices so returning error does not help.
609          */
610         if (!pin)
611                 return 0;
612
613         if ((!pin->eld.monitor_present) ||
614                         (!pin->eld.eld_valid)) {
615
616                 dev_warn(&hdac->hdac.dev,
617                         "Failed: montior present? %d ELD valid?: %d for pin: %d\n",
618                         pin->eld.monitor_present, pin->eld.eld_valid, pin->nid);
619
620                 return 0;
621         }
622
623         dai_map->pin = pin;
624
625         hdac_hdmi_enable_cvt(hdac, dai_map);
626         ret = hdac_hdmi_enable_pin(hdac, dai_map);
627         if (ret < 0)
628                 return ret;
629
630         ret = hdac_hdmi_eld_limit_formats(substream->runtime,
631                                 pin->eld.eld_buffer);
632         if (ret < 0)
633                 return ret;
634
635         return snd_pcm_hw_constraint_eld(substream->runtime,
636                                 pin->eld.eld_buffer);
637 }
638
639 static int hdac_hdmi_trigger(struct snd_pcm_substream *substream, int cmd,
640                 struct snd_soc_dai *dai)
641 {
642         struct hdac_hdmi_dai_pin_map *dai_map;
643         struct hdac_ext_device *hdac = snd_soc_dai_get_drvdata(dai);
644         struct hdac_hdmi_priv *hdmi = hdac->private_data;
645         int ret;
646
647         dai_map = &hdmi->dai_map[dai->id];
648         if (cmd == SNDRV_PCM_TRIGGER_RESUME) {
649                 ret = hdac_hdmi_enable_pin(hdac, dai_map);
650                 if (ret < 0)
651                         return ret;
652
653                 return hdac_hdmi_playback_prepare(substream, dai);
654         }
655
656         return 0;
657 }
658
659 static void hdac_hdmi_pcm_close(struct snd_pcm_substream *substream,
660                 struct snd_soc_dai *dai)
661 {
662         struct hdac_ext_device *hdac = snd_soc_dai_get_drvdata(dai);
663         struct hdac_hdmi_priv *hdmi = hdac->private_data;
664         struct hdac_hdmi_dai_pin_map *dai_map;
665
666         dai_map = &hdmi->dai_map[dai->id];
667
668         if (dai_map->pin) {
669                 snd_hdac_codec_write(&hdac->hdac, dai_map->cvt->nid, 0,
670                                 AC_VERB_SET_CHANNEL_STREAMID, 0);
671                 snd_hdac_codec_write(&hdac->hdac, dai_map->cvt->nid, 0,
672                                 AC_VERB_SET_STREAM_FORMAT, 0);
673
674                 hdac_hdmi_set_power_state(hdac, dai_map, AC_PWRST_D3);
675
676                 snd_hdac_codec_write(&hdac->hdac, dai_map->pin->nid, 0,
677                         AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_MUTE);
678
679                 mutex_lock(&dai_map->pin->lock);
680                 dai_map->pin->chmap_set = false;
681                 memset(dai_map->pin->chmap, 0, sizeof(dai_map->pin->chmap));
682                 dai_map->pin->channels = 0;
683                 mutex_unlock(&dai_map->pin->lock);
684
685                 dai_map->pin = NULL;
686         }
687 }
688
689 static int
690 hdac_hdmi_query_cvt_params(struct hdac_device *hdac, struct hdac_hdmi_cvt *cvt)
691 {
692         unsigned int chans;
693         struct hdac_ext_device *edev = to_ehdac_device(hdac);
694         struct hdac_hdmi_priv *hdmi = edev->private_data;
695         int err;
696
697         chans = get_wcaps(hdac, cvt->nid);
698         chans = get_wcaps_channels(chans);
699
700         cvt->params.channels_min = 2;
701
702         cvt->params.channels_max = chans;
703         if (chans > hdmi->chmap.channels_max)
704                 hdmi->chmap.channels_max = chans;
705
706         err = snd_hdac_query_supported_pcm(hdac, cvt->nid,
707                         &cvt->params.rates,
708                         &cvt->params.formats,
709                         &cvt->params.maxbps);
710         if (err < 0)
711                 dev_err(&hdac->dev,
712                         "Failed to query pcm params for nid %d: %d\n",
713                         cvt->nid, err);
714
715         return err;
716 }
717
718 static int hdac_hdmi_fill_widget_info(struct device *dev,
719                                 struct snd_soc_dapm_widget *w,
720                                 enum snd_soc_dapm_type id, void *priv,
721                                 const char *wname, const char *stream,
722                                 struct snd_kcontrol_new *wc, int numkc)
723 {
724         w->id = id;
725         w->name = devm_kstrdup(dev, wname, GFP_KERNEL);
726         if (!w->name)
727                 return -ENOMEM;
728
729         w->sname = stream;
730         w->reg = SND_SOC_NOPM;
731         w->shift = 0;
732         w->kcontrol_news = wc;
733         w->num_kcontrols = numkc;
734         w->priv = priv;
735
736         return 0;
737 }
738
739 static void hdac_hdmi_fill_route(struct snd_soc_dapm_route *route,
740                 const char *sink, const char *control, const char *src,
741                 int (*handler)(struct snd_soc_dapm_widget *src,
742                         struct snd_soc_dapm_widget *sink))
743 {
744         route->sink = sink;
745         route->source = src;
746         route->control = control;
747         route->connected = handler;
748 }
749
750 static struct hdac_hdmi_pcm *hdac_hdmi_get_pcm(struct hdac_ext_device *edev,
751                                         struct hdac_hdmi_pin *pin)
752 {
753         struct hdac_hdmi_priv *hdmi = edev->private_data;
754         struct hdac_hdmi_pcm *pcm = NULL;
755
756         list_for_each_entry(pcm, &hdmi->pcm_list, head) {
757                 if (pcm->pin == pin)
758                         return pcm;
759         }
760
761         return NULL;
762 }
763
764 /*
765  * Based on user selection, map the PINs with the PCMs.
766  */
767 static int hdac_hdmi_set_pin_mux(struct snd_kcontrol *kcontrol,
768                 struct snd_ctl_elem_value *ucontrol)
769 {
770         int ret;
771         struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
772         struct snd_soc_dapm_widget *w = snd_soc_dapm_kcontrol_widget(kcontrol);
773         struct snd_soc_dapm_context *dapm = w->dapm;
774         struct hdac_hdmi_pin *pin = w->priv;
775         struct hdac_ext_device *edev = to_hda_ext_device(dapm->dev);
776         struct hdac_hdmi_priv *hdmi = edev->private_data;
777         struct hdac_hdmi_pcm *pcm = NULL;
778         const char *cvt_name =  e->texts[ucontrol->value.enumerated.item[0]];
779
780         ret = snd_soc_dapm_put_enum_double(kcontrol, ucontrol);
781         if (ret < 0)
782                 return ret;
783
784         mutex_lock(&hdmi->pin_mutex);
785         list_for_each_entry(pcm, &hdmi->pcm_list, head) {
786                 if (pcm->pin == pin)
787                         pcm->pin = NULL;
788
789                 /*
790                  * Jack status is not reported during device probe as the
791                  * PCMs are not registered by then. So report it here.
792                  */
793                 if (!strcmp(cvt_name, pcm->cvt->name) && !pcm->pin) {
794                         pcm->pin = pin;
795                         if (pin->eld.monitor_present && pin->eld.eld_valid) {
796                                 dev_dbg(&edev->hdac.dev,
797                                         "jack report for pcm=%d\n",
798                                         pcm->pcm_id);
799
800                                 snd_jack_report(pcm->jack, SND_JACK_AVOUT);
801                         }
802                         mutex_unlock(&hdmi->pin_mutex);
803                         return ret;
804                 }
805         }
806         mutex_unlock(&hdmi->pin_mutex);
807
808         return ret;
809 }
810
811 /*
812  * Ideally the Mux inputs should be based on the num_muxs enumerated, but
813  * the display driver seem to be programming the connection list for the pin
814  * widget runtime.
815  *
816  * So programming all the possible inputs for the mux, the user has to take
817  * care of selecting the right one and leaving all other inputs selected to
818  * "NONE"
819  */
820 static int hdac_hdmi_create_pin_muxs(struct hdac_ext_device *edev,
821                                 struct hdac_hdmi_pin *pin,
822                                 struct snd_soc_dapm_widget *widget,
823                                 const char *widget_name)
824 {
825         struct hdac_hdmi_priv *hdmi = edev->private_data;
826         struct snd_kcontrol_new *kc;
827         struct hdac_hdmi_cvt *cvt;
828         struct soc_enum *se;
829         char kc_name[NAME_SIZE];
830         char mux_items[NAME_SIZE];
831         /* To hold inputs to the Pin mux */
832         char *items[HDA_MAX_CONNECTIONS];
833         int i = 0;
834         int num_items = hdmi->num_cvt + 1;
835
836         kc = devm_kzalloc(&edev->hdac.dev, sizeof(*kc), GFP_KERNEL);
837         if (!kc)
838                 return -ENOMEM;
839
840         se = devm_kzalloc(&edev->hdac.dev, sizeof(*se), GFP_KERNEL);
841         if (!se)
842                 return -ENOMEM;
843
844         sprintf(kc_name, "Pin %d Input", pin->nid);
845         kc->name = devm_kstrdup(&edev->hdac.dev, kc_name, GFP_KERNEL);
846         if (!kc->name)
847                 return -ENOMEM;
848
849         kc->private_value = (long)se;
850         kc->iface = SNDRV_CTL_ELEM_IFACE_MIXER;
851         kc->access = 0;
852         kc->info = snd_soc_info_enum_double;
853         kc->put = hdac_hdmi_set_pin_mux;
854         kc->get = snd_soc_dapm_get_enum_double;
855
856         se->reg = SND_SOC_NOPM;
857
858         /* enum texts: ["NONE", "cvt #", "cvt #", ...] */
859         se->items = num_items;
860         se->mask = roundup_pow_of_two(se->items) - 1;
861
862         sprintf(mux_items, "NONE");
863         items[i] = devm_kstrdup(&edev->hdac.dev, mux_items, GFP_KERNEL);
864         if (!items[i])
865                 return -ENOMEM;
866
867         list_for_each_entry(cvt, &hdmi->cvt_list, head) {
868                 i++;
869                 sprintf(mux_items, "cvt %d", cvt->nid);
870                 items[i] = devm_kstrdup(&edev->hdac.dev, mux_items, GFP_KERNEL);
871                 if (!items[i])
872                         return -ENOMEM;
873         }
874
875         se->texts = devm_kmemdup(&edev->hdac.dev, items,
876                         (num_items  * sizeof(char *)), GFP_KERNEL);
877         if (!se->texts)
878                 return -ENOMEM;
879
880         return hdac_hdmi_fill_widget_info(&edev->hdac.dev, widget,
881                         snd_soc_dapm_mux, pin, widget_name, NULL, kc, 1);
882 }
883
884 /* Add cvt <- input <- mux route map */
885 static void hdac_hdmi_add_pinmux_cvt_route(struct hdac_ext_device *edev,
886                         struct snd_soc_dapm_widget *widgets,
887                         struct snd_soc_dapm_route *route, int rindex)
888 {
889         struct hdac_hdmi_priv *hdmi = edev->private_data;
890         const struct snd_kcontrol_new *kc;
891         struct soc_enum *se;
892         int mux_index = hdmi->num_cvt + hdmi->num_pin;
893         int i, j;
894
895         for (i = 0; i < hdmi->num_pin; i++) {
896                 kc = widgets[mux_index].kcontrol_news;
897                 se = (struct soc_enum *)kc->private_value;
898                 for (j = 0; j < hdmi->num_cvt; j++) {
899                         hdac_hdmi_fill_route(&route[rindex],
900                                         widgets[mux_index].name,
901                                         se->texts[j + 1],
902                                         widgets[j].name, NULL);
903
904                         rindex++;
905                 }
906
907                 mux_index++;
908         }
909 }
910
911 /*
912  * Widgets are added in the below sequence
913  *      Converter widgets for num converters enumerated
914  *      Pin widgets for num pins enumerated
915  *      Pin mux widgets to represent connenction list of pin widget
916  *
917  * Total widgets elements = num_cvt + num_pin + num_pin;
918  *
919  * Routes are added as below:
920  *      pin mux -> pin (based on num_pins)
921  *      cvt -> "Input sel control" -> pin_mux
922  *
923  * Total route elements:
924  *      num_pins + (pin_muxes * num_cvt)
925  */
926 static int create_fill_widget_route_map(struct snd_soc_dapm_context *dapm)
927 {
928         struct snd_soc_dapm_widget *widgets;
929         struct snd_soc_dapm_route *route;
930         struct hdac_ext_device *edev = to_hda_ext_device(dapm->dev);
931         struct hdac_hdmi_priv *hdmi = edev->private_data;
932         struct snd_soc_dai_driver *dai_drv = dapm->component->dai_drv;
933         char widget_name[NAME_SIZE];
934         struct hdac_hdmi_cvt *cvt;
935         struct hdac_hdmi_pin *pin;
936         int ret, i = 0, num_routes = 0;
937
938         if (list_empty(&hdmi->cvt_list) || list_empty(&hdmi->pin_list))
939                 return -EINVAL;
940
941         widgets = devm_kzalloc(dapm->dev,
942                 (sizeof(*widgets) * ((2 * hdmi->num_pin) + hdmi->num_cvt)),
943                 GFP_KERNEL);
944
945         if (!widgets)
946                 return -ENOMEM;
947
948         /* DAPM widgets to represent each converter widget */
949         list_for_each_entry(cvt, &hdmi->cvt_list, head) {
950                 sprintf(widget_name, "Converter %d", cvt->nid);
951                 ret = hdac_hdmi_fill_widget_info(dapm->dev, &widgets[i],
952                         snd_soc_dapm_aif_in, &cvt->nid,
953                         widget_name, dai_drv[i].playback.stream_name, NULL, 0);
954                 if (ret < 0)
955                         return ret;
956                 i++;
957         }
958
959         list_for_each_entry(pin, &hdmi->pin_list, head) {
960                 sprintf(widget_name, "hif%d Output", pin->nid);
961                 ret = hdac_hdmi_fill_widget_info(dapm->dev, &widgets[i],
962                                 snd_soc_dapm_output, &pin->nid,
963                                 widget_name, NULL, NULL, 0);
964                 if (ret < 0)
965                         return ret;
966                 i++;
967         }
968
969         /* DAPM widgets to represent the connection list to pin widget */
970         list_for_each_entry(pin, &hdmi->pin_list, head) {
971                 sprintf(widget_name, "Pin %d Mux", pin->nid);
972                 ret = hdac_hdmi_create_pin_muxs(edev, pin, &widgets[i],
973                                                         widget_name);
974                 if (ret < 0)
975                         return ret;
976                 i++;
977
978                 /* For cvt to pin_mux mapping */
979                 num_routes += hdmi->num_cvt;
980
981                 /* For pin_mux to pin mapping */
982                 num_routes++;
983         }
984
985         route = devm_kzalloc(dapm->dev, (sizeof(*route) * num_routes),
986                                                         GFP_KERNEL);
987         if (!route)
988                 return -ENOMEM;
989
990         i = 0;
991         /* Add pin <- NULL <- mux route map */
992         list_for_each_entry(pin, &hdmi->pin_list, head) {
993                 int sink_index = i + hdmi->num_cvt;
994                 int src_index = sink_index + hdmi->num_pin;
995
996                 hdac_hdmi_fill_route(&route[i],
997                                 widgets[sink_index].name, NULL,
998                                 widgets[src_index].name, NULL);
999                 i++;
1000
1001         }
1002
1003         hdac_hdmi_add_pinmux_cvt_route(edev, widgets, route, i);
1004
1005         snd_soc_dapm_new_controls(dapm, widgets,
1006                 ((2 * hdmi->num_pin) + hdmi->num_cvt));
1007
1008         snd_soc_dapm_add_routes(dapm, route, num_routes);
1009         snd_soc_dapm_new_widgets(dapm->card);
1010
1011         return 0;
1012
1013 }
1014
1015 static int hdac_hdmi_init_dai_map(struct hdac_ext_device *edev)
1016 {
1017         struct hdac_hdmi_priv *hdmi = edev->private_data;
1018         struct hdac_hdmi_dai_pin_map *dai_map;
1019         struct hdac_hdmi_cvt *cvt;
1020         int dai_id = 0;
1021
1022         if (list_empty(&hdmi->cvt_list))
1023                 return -EINVAL;
1024
1025         list_for_each_entry(cvt, &hdmi->cvt_list, head) {
1026                 dai_map = &hdmi->dai_map[dai_id];
1027                 dai_map->dai_id = dai_id;
1028                 dai_map->cvt = cvt;
1029
1030                 dai_id++;
1031
1032                 if (dai_id == HDA_MAX_CVTS) {
1033                         dev_warn(&edev->hdac.dev,
1034                                 "Max dais supported: %d\n", dai_id);
1035                         break;
1036                 }
1037         }
1038
1039         return 0;
1040 }
1041
1042 static int hdac_hdmi_add_cvt(struct hdac_ext_device *edev, hda_nid_t nid)
1043 {
1044         struct hdac_hdmi_priv *hdmi = edev->private_data;
1045         struct hdac_hdmi_cvt *cvt;
1046         char name[NAME_SIZE];
1047
1048         cvt = kzalloc(sizeof(*cvt), GFP_KERNEL);
1049         if (!cvt)
1050                 return -ENOMEM;
1051
1052         cvt->nid = nid;
1053         sprintf(name, "cvt %d", cvt->nid);
1054         cvt->name = kstrdup(name, GFP_KERNEL);
1055
1056         list_add_tail(&cvt->head, &hdmi->cvt_list);
1057         hdmi->num_cvt++;
1058
1059         return hdac_hdmi_query_cvt_params(&edev->hdac, cvt);
1060 }
1061
1062 static void hdac_hdmi_parse_eld(struct hdac_ext_device *edev,
1063                         struct hdac_hdmi_pin *pin)
1064 {
1065         pin->eld.info.spk_alloc = pin->eld.eld_buffer[DRM_ELD_SPEAKER];
1066 }
1067
1068 static void hdac_hdmi_present_sense(struct hdac_hdmi_pin *pin, int repoll)
1069 {
1070         struct hdac_ext_device *edev = pin->edev;
1071         struct hdac_hdmi_priv *hdmi = edev->private_data;
1072         struct hdac_hdmi_pcm *pcm;
1073         int val;
1074
1075         pin->repoll_count = repoll;
1076
1077         pm_runtime_get_sync(&edev->hdac.dev);
1078         val = snd_hdac_codec_read(&edev->hdac, pin->nid, 0,
1079                                         AC_VERB_GET_PIN_SENSE, 0);
1080
1081         dev_dbg(&edev->hdac.dev, "Pin sense val %x for pin: %d\n",
1082                                                 val, pin->nid);
1083
1084
1085         mutex_lock(&hdmi->pin_mutex);
1086         pin->eld.monitor_present = !!(val & AC_PINSENSE_PRESENCE);
1087         pin->eld.eld_valid = !!(val & AC_PINSENSE_ELDV);
1088
1089         pcm = hdac_hdmi_get_pcm(edev, pin);
1090
1091         if (!pin->eld.monitor_present || !pin->eld.eld_valid) {
1092
1093                 dev_dbg(&edev->hdac.dev, "%s: disconnect for pin %d\n",
1094                                                 __func__, pin->nid);
1095
1096                 /*
1097                  * PCMs are not registered during device probe, so don't
1098                  * report jack here. It will be done in usermode mux
1099                  * control select.
1100                  */
1101                 if (pcm) {
1102                         dev_dbg(&edev->hdac.dev,
1103                                 "jack report for pcm=%d\n", pcm->pcm_id);
1104
1105                         snd_jack_report(pcm->jack, 0);
1106                 }
1107
1108                 mutex_unlock(&hdmi->pin_mutex);
1109                 goto put_hdac_device;
1110         }
1111
1112         if (pin->eld.monitor_present && pin->eld.eld_valid) {
1113                 /* TODO: use i915 component for reading ELD later */
1114                 if (hdac_hdmi_get_eld(&edev->hdac, pin->nid,
1115                                 pin->eld.eld_buffer,
1116                                 &pin->eld.eld_size) == 0) {
1117
1118                         if (pcm) {
1119                                 dev_dbg(&edev->hdac.dev,
1120                                         "jack report for pcm=%d\n",
1121                                         pcm->pcm_id);
1122
1123                                 snd_jack_report(pcm->jack, SND_JACK_AVOUT);
1124                         }
1125                         hdac_hdmi_parse_eld(edev, pin);
1126
1127                         print_hex_dump_debug("ELD: ",
1128                                         DUMP_PREFIX_OFFSET, 16, 1,
1129                                         pin->eld.eld_buffer, pin->eld.eld_size,
1130                                         true);
1131                 } else {
1132                         pin->eld.monitor_present = false;
1133                         pin->eld.eld_valid = false;
1134
1135                         if (pcm) {
1136                                 dev_dbg(&edev->hdac.dev,
1137                                         "jack report for pcm=%d\n",
1138                                         pcm->pcm_id);
1139
1140                                 snd_jack_report(pcm->jack, 0);
1141                         }
1142                 }
1143         }
1144
1145         mutex_unlock(&hdmi->pin_mutex);
1146
1147         /*
1148          * Sometimes the pin_sense may present invalid monitor
1149          * present and eld_valid. If ELD data is not valid, loop few
1150          * more times to get correct pin sense and valid ELD.
1151          */
1152         if ((!pin->eld.monitor_present || !pin->eld.eld_valid) && repoll)
1153                 schedule_delayed_work(&pin->work, msecs_to_jiffies(300));
1154
1155 put_hdac_device:
1156         pm_runtime_put_sync(&edev->hdac.dev);
1157 }
1158
1159 static void hdac_hdmi_repoll_eld(struct work_struct *work)
1160 {
1161         struct hdac_hdmi_pin *pin =
1162                 container_of(to_delayed_work(work), struct hdac_hdmi_pin, work);
1163
1164         /* picked from legacy HDA driver */
1165         if (pin->repoll_count++ > 6)
1166                 pin->repoll_count = 0;
1167
1168         hdac_hdmi_present_sense(pin, pin->repoll_count);
1169 }
1170
1171 static int hdac_hdmi_add_pin(struct hdac_ext_device *edev, hda_nid_t nid)
1172 {
1173         struct hdac_hdmi_priv *hdmi = edev->private_data;
1174         struct hdac_hdmi_pin *pin;
1175
1176         pin = kzalloc(sizeof(*pin), GFP_KERNEL);
1177         if (!pin)
1178                 return -ENOMEM;
1179
1180         pin->nid = nid;
1181
1182         list_add_tail(&pin->head, &hdmi->pin_list);
1183         hdmi->num_pin++;
1184
1185         pin->edev = edev;
1186         mutex_init(&pin->lock);
1187         INIT_DELAYED_WORK(&pin->work, hdac_hdmi_repoll_eld);
1188
1189         return 0;
1190 }
1191
1192 #define INTEL_VENDOR_NID 0x08
1193 #define INTEL_GET_VENDOR_VERB 0xf81
1194 #define INTEL_SET_VENDOR_VERB 0x781
1195 #define INTEL_EN_DP12                   0x02 /* enable DP 1.2 features */
1196 #define INTEL_EN_ALL_PIN_CVTS   0x01 /* enable 2nd & 3rd pins and convertors */
1197
1198 static void hdac_hdmi_skl_enable_all_pins(struct hdac_device *hdac)
1199 {
1200         unsigned int vendor_param;
1201
1202         vendor_param = snd_hdac_codec_read(hdac, INTEL_VENDOR_NID, 0,
1203                                 INTEL_GET_VENDOR_VERB, 0);
1204         if (vendor_param == -1 || vendor_param & INTEL_EN_ALL_PIN_CVTS)
1205                 return;
1206
1207         vendor_param |= INTEL_EN_ALL_PIN_CVTS;
1208         vendor_param = snd_hdac_codec_read(hdac, INTEL_VENDOR_NID, 0,
1209                                 INTEL_SET_VENDOR_VERB, vendor_param);
1210         if (vendor_param == -1)
1211                 return;
1212 }
1213
1214 static void hdac_hdmi_skl_enable_dp12(struct hdac_device *hdac)
1215 {
1216         unsigned int vendor_param;
1217
1218         vendor_param = snd_hdac_codec_read(hdac, INTEL_VENDOR_NID, 0,
1219                                 INTEL_GET_VENDOR_VERB, 0);
1220         if (vendor_param == -1 || vendor_param & INTEL_EN_DP12)
1221                 return;
1222
1223         /* enable DP1.2 mode */
1224         vendor_param |= INTEL_EN_DP12;
1225         vendor_param = snd_hdac_codec_read(hdac, INTEL_VENDOR_NID, 0,
1226                                 INTEL_SET_VENDOR_VERB, vendor_param);
1227         if (vendor_param == -1)
1228                 return;
1229
1230 }
1231
1232 static struct snd_soc_dai_ops hdmi_dai_ops = {
1233         .startup = hdac_hdmi_pcm_open,
1234         .shutdown = hdac_hdmi_pcm_close,
1235         .hw_params = hdac_hdmi_set_hw_params,
1236         .prepare = hdac_hdmi_playback_prepare,
1237         .trigger = hdac_hdmi_trigger,
1238         .hw_free = hdac_hdmi_playback_cleanup,
1239 };
1240
1241 /*
1242  * Each converter can support a stream independently. So a dai is created
1243  * based on the number of converter queried.
1244  */
1245 static int hdac_hdmi_create_dais(struct hdac_device *hdac,
1246                 struct snd_soc_dai_driver **dais,
1247                 struct hdac_hdmi_priv *hdmi, int num_dais)
1248 {
1249         struct snd_soc_dai_driver *hdmi_dais;
1250         struct hdac_hdmi_cvt *cvt;
1251         char name[NAME_SIZE], dai_name[NAME_SIZE];
1252         int i = 0;
1253         u32 rates, bps;
1254         unsigned int rate_max = 384000, rate_min = 8000;
1255         u64 formats;
1256         int ret;
1257
1258         hdmi_dais = devm_kzalloc(&hdac->dev,
1259                         (sizeof(*hdmi_dais) * num_dais),
1260                         GFP_KERNEL);
1261         if (!hdmi_dais)
1262                 return -ENOMEM;
1263
1264         list_for_each_entry(cvt, &hdmi->cvt_list, head) {
1265                 ret = snd_hdac_query_supported_pcm(hdac, cvt->nid,
1266                                         &rates, &formats, &bps);
1267                 if (ret)
1268                         return ret;
1269
1270                 sprintf(dai_name, "intel-hdmi-hifi%d", i+1);
1271                 hdmi_dais[i].name = devm_kstrdup(&hdac->dev,
1272                                         dai_name, GFP_KERNEL);
1273
1274                 if (!hdmi_dais[i].name)
1275                         return -ENOMEM;
1276
1277                 snprintf(name, sizeof(name), "hifi%d", i+1);
1278                 hdmi_dais[i].playback.stream_name =
1279                                 devm_kstrdup(&hdac->dev, name, GFP_KERNEL);
1280                 if (!hdmi_dais[i].playback.stream_name)
1281                         return -ENOMEM;
1282
1283                 /*
1284                  * Set caps based on capability queried from the converter.
1285                  * It will be constrained runtime based on ELD queried.
1286                  */
1287                 hdmi_dais[i].playback.formats = formats;
1288                 hdmi_dais[i].playback.rates = rates;
1289                 hdmi_dais[i].playback.rate_max = rate_max;
1290                 hdmi_dais[i].playback.rate_min = rate_min;
1291                 hdmi_dais[i].playback.channels_min = 2;
1292                 hdmi_dais[i].playback.channels_max = 2;
1293                 hdmi_dais[i].ops = &hdmi_dai_ops;
1294
1295                 i++;
1296         }
1297
1298         *dais = hdmi_dais;
1299
1300         return 0;
1301 }
1302
1303 /*
1304  * Parse all nodes and store the cvt/pin nids in array
1305  * Add one time initialization for pin and cvt widgets
1306  */
1307 static int hdac_hdmi_parse_and_map_nid(struct hdac_ext_device *edev,
1308                 struct snd_soc_dai_driver **dais, int *num_dais)
1309 {
1310         hda_nid_t nid;
1311         int i, num_nodes;
1312         struct hdac_device *hdac = &edev->hdac;
1313         struct hdac_hdmi_priv *hdmi = edev->private_data;
1314         int ret;
1315
1316         hdac_hdmi_skl_enable_all_pins(hdac);
1317         hdac_hdmi_skl_enable_dp12(hdac);
1318
1319         num_nodes = snd_hdac_get_sub_nodes(hdac, hdac->afg, &nid);
1320         if (!nid || num_nodes <= 0) {
1321                 dev_warn(&hdac->dev, "HDMI: failed to get afg sub nodes\n");
1322                 return -EINVAL;
1323         }
1324
1325         hdac->num_nodes = num_nodes;
1326         hdac->start_nid = nid;
1327
1328         for (i = 0; i < hdac->num_nodes; i++, nid++) {
1329                 unsigned int caps;
1330                 unsigned int type;
1331
1332                 caps = get_wcaps(hdac, nid);
1333                 type = get_wcaps_type(caps);
1334
1335                 if (!(caps & AC_WCAP_DIGITAL))
1336                         continue;
1337
1338                 switch (type) {
1339
1340                 case AC_WID_AUD_OUT:
1341                         ret = hdac_hdmi_add_cvt(edev, nid);
1342                         if (ret < 0)
1343                                 return ret;
1344                         break;
1345
1346                 case AC_WID_PIN:
1347                         ret = hdac_hdmi_add_pin(edev, nid);
1348                         if (ret < 0)
1349                                 return ret;
1350                         break;
1351                 }
1352         }
1353
1354         hdac->end_nid = nid;
1355
1356         if (!hdmi->num_pin || !hdmi->num_cvt)
1357                 return -EIO;
1358
1359         ret = hdac_hdmi_create_dais(hdac, dais, hdmi, hdmi->num_cvt);
1360         if (ret) {
1361                 dev_err(&hdac->dev, "Failed to create dais with err: %d\n",
1362                                                         ret);
1363                 return ret;
1364         }
1365
1366         *num_dais = hdmi->num_cvt;
1367
1368         return hdac_hdmi_init_dai_map(edev);
1369 }
1370
1371 static void hdac_hdmi_eld_notify_cb(void *aptr, int port, int pipe)
1372 {
1373         struct hdac_ext_device *edev = aptr;
1374         struct hdac_hdmi_priv *hdmi = edev->private_data;
1375         struct hdac_hdmi_pin *pin;
1376         struct snd_soc_codec *codec = edev->scodec;
1377
1378         /* Don't know how this mapping is derived */
1379         hda_nid_t pin_nid = port + 0x04;
1380
1381         dev_dbg(&edev->hdac.dev, "%s: for pin: %d\n", __func__, pin_nid);
1382
1383         /*
1384          * skip notification during system suspend (but not in runtime PM);
1385          * the state will be updated at resume. Also since the ELD and
1386          * connection states are updated in anyway at the end of the resume,
1387          * we can skip it when received during PM process.
1388          */
1389         if (snd_power_get_state(codec->component.card->snd_card) !=
1390                         SNDRV_CTL_POWER_D0)
1391                 return;
1392
1393         if (atomic_read(&edev->hdac.in_pm))
1394                 return;
1395
1396         list_for_each_entry(pin, &hdmi->pin_list, head) {
1397                 if (pin->nid == pin_nid)
1398                         hdac_hdmi_present_sense(pin, 1);
1399         }
1400 }
1401
1402 static struct i915_audio_component_audio_ops aops = {
1403         .pin_eld_notify = hdac_hdmi_eld_notify_cb,
1404 };
1405
1406 static struct snd_pcm *hdac_hdmi_get_pcm_from_id(struct snd_soc_card *card,
1407                                                 int device)
1408 {
1409         struct snd_soc_pcm_runtime *rtd;
1410
1411         list_for_each_entry(rtd, &card->rtd_list, list) {
1412                 if (rtd->pcm && (rtd->pcm->device == device))
1413                         return rtd->pcm;
1414         }
1415
1416         return NULL;
1417 }
1418
1419 int hdac_hdmi_jack_init(struct snd_soc_dai *dai, int device)
1420 {
1421         char jack_name[NAME_SIZE];
1422         struct snd_soc_codec *codec = dai->codec;
1423         struct hdac_ext_device *edev = snd_soc_codec_get_drvdata(codec);
1424         struct snd_soc_dapm_context *dapm =
1425                 snd_soc_component_get_dapm(&codec->component);
1426         struct hdac_hdmi_priv *hdmi = edev->private_data;
1427         struct hdac_hdmi_pcm *pcm;
1428         struct snd_pcm *snd_pcm;
1429         int err;
1430
1431         /*
1432          * this is a new PCM device, create new pcm and
1433          * add to the pcm list
1434          */
1435         pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
1436         if (!pcm)
1437                 return -ENOMEM;
1438         pcm->pcm_id = device;
1439         pcm->cvt = hdmi->dai_map[dai->id].cvt;
1440
1441         snd_pcm = hdac_hdmi_get_pcm_from_id(dai->component->card, device);
1442         if (snd_pcm) {
1443                 err = snd_hdac_add_chmap_ctls(snd_pcm, device, &hdmi->chmap);
1444                 if (err < 0) {
1445                         dev_err(&edev->hdac.dev,
1446                                 "chmap control add failed with err: %d for pcm: %d\n",
1447                                 err, device);
1448                         kfree(pcm);
1449                         return err;
1450                 }
1451         }
1452
1453         list_add_tail(&pcm->head, &hdmi->pcm_list);
1454
1455         sprintf(jack_name, "HDMI/DP, pcm=%d Jack", device);
1456
1457         return snd_jack_new(dapm->card->snd_card, jack_name,
1458                 SND_JACK_AVOUT, &pcm->jack, true, false);
1459 }
1460 EXPORT_SYMBOL_GPL(hdac_hdmi_jack_init);
1461
1462 static int hdmi_codec_probe(struct snd_soc_codec *codec)
1463 {
1464         struct hdac_ext_device *edev = snd_soc_codec_get_drvdata(codec);
1465         struct hdac_hdmi_priv *hdmi = edev->private_data;
1466         struct snd_soc_dapm_context *dapm =
1467                 snd_soc_component_get_dapm(&codec->component);
1468         struct hdac_hdmi_pin *pin;
1469         struct hdac_ext_link *hlink = NULL;
1470         int ret;
1471
1472         edev->scodec = codec;
1473
1474         /*
1475          * hold the ref while we probe, also no need to drop the ref on
1476          * exit, we call pm_runtime_suspend() so that will do for us
1477          */
1478         hlink = snd_hdac_ext_bus_get_link(edev->ebus, dev_name(&edev->hdac.dev));
1479         if (!hlink) {
1480                 dev_err(&edev->hdac.dev, "hdac link not found\n");
1481                 return -EIO;
1482         }
1483
1484         snd_hdac_ext_bus_link_get(edev->ebus, hlink);
1485
1486         ret = create_fill_widget_route_map(dapm);
1487         if (ret < 0)
1488                 return ret;
1489
1490         aops.audio_ptr = edev;
1491         ret = snd_hdac_i915_register_notifier(&aops);
1492         if (ret < 0) {
1493                 dev_err(&edev->hdac.dev, "notifier register failed: err: %d\n",
1494                                 ret);
1495                 return ret;
1496         }
1497
1498         list_for_each_entry(pin, &hdmi->pin_list, head)
1499                 hdac_hdmi_present_sense(pin, 1);
1500
1501         /* Imp: Store the card pointer in hda_codec */
1502         edev->card = dapm->card->snd_card;
1503
1504         /*
1505          * hdac_device core already sets the state to active and calls
1506          * get_noresume. So enable runtime and set the device to suspend.
1507          */
1508         pm_runtime_enable(&edev->hdac.dev);
1509         pm_runtime_put(&edev->hdac.dev);
1510         pm_runtime_suspend(&edev->hdac.dev);
1511
1512         return 0;
1513 }
1514
1515 static int hdmi_codec_remove(struct snd_soc_codec *codec)
1516 {
1517         struct hdac_ext_device *edev = snd_soc_codec_get_drvdata(codec);
1518
1519         pm_runtime_disable(&edev->hdac.dev);
1520         return 0;
1521 }
1522
1523 #ifdef CONFIG_PM
1524 static int hdmi_codec_prepare(struct device *dev)
1525 {
1526         struct hdac_ext_device *edev = to_hda_ext_device(dev);
1527         struct hdac_device *hdac = &edev->hdac;
1528
1529         pm_runtime_get_sync(&edev->hdac.dev);
1530
1531         /*
1532          * Power down afg.
1533          * codec_read is preferred over codec_write to set the power state.
1534          * This way verb is send to set the power state and response
1535          * is received. So setting power state is ensured without using loop
1536          * to read the state.
1537          */
1538         snd_hdac_codec_read(hdac, hdac->afg, 0, AC_VERB_SET_POWER_STATE,
1539                                                         AC_PWRST_D3);
1540
1541         return 0;
1542 }
1543
1544 static void hdmi_codec_complete(struct device *dev)
1545 {
1546         struct hdac_ext_device *edev = to_hda_ext_device(dev);
1547         struct hdac_hdmi_priv *hdmi = edev->private_data;
1548         struct hdac_hdmi_pin *pin;
1549         struct hdac_device *hdac = &edev->hdac;
1550
1551         /* Power up afg */
1552         snd_hdac_codec_read(hdac, hdac->afg, 0, AC_VERB_SET_POWER_STATE,
1553                                                         AC_PWRST_D0);
1554
1555         hdac_hdmi_skl_enable_all_pins(&edev->hdac);
1556         hdac_hdmi_skl_enable_dp12(&edev->hdac);
1557
1558         /*
1559          * As the ELD notify callback request is not entertained while the
1560          * device is in suspend state. Need to manually check detection of
1561          * all pins here.
1562          */
1563         list_for_each_entry(pin, &hdmi->pin_list, head)
1564                 hdac_hdmi_present_sense(pin, 1);
1565
1566         pm_runtime_put_sync(&edev->hdac.dev);
1567 }
1568 #else
1569 #define hdmi_codec_prepare NULL
1570 #define hdmi_codec_complete NULL
1571 #endif
1572
1573 static struct snd_soc_codec_driver hdmi_hda_codec = {
1574         .probe          = hdmi_codec_probe,
1575         .remove         = hdmi_codec_remove,
1576         .idle_bias_off  = true,
1577 };
1578
1579 static void hdac_hdmi_get_chmap(struct hdac_device *hdac, int pcm_idx,
1580                                         unsigned char *chmap)
1581 {
1582         struct hdac_ext_device *edev = to_ehdac_device(hdac);
1583         struct hdac_hdmi_priv *hdmi = edev->private_data;
1584         struct hdac_hdmi_pcm *pcm = get_hdmi_pcm_from_id(hdmi, pcm_idx);
1585         struct hdac_hdmi_pin *pin = pcm->pin;
1586
1587         /* chmap is already set to 0 in caller */
1588         if (!pin)
1589                 return;
1590
1591         memcpy(chmap, pin->chmap, ARRAY_SIZE(pin->chmap));
1592 }
1593
1594 static void hdac_hdmi_set_chmap(struct hdac_device *hdac, int pcm_idx,
1595                                 unsigned char *chmap, int prepared)
1596 {
1597         struct hdac_ext_device *edev = to_ehdac_device(hdac);
1598         struct hdac_hdmi_priv *hdmi = edev->private_data;
1599         struct hdac_hdmi_pcm *pcm = get_hdmi_pcm_from_id(hdmi, pcm_idx);
1600         struct hdac_hdmi_pin *pin = pcm->pin;
1601
1602         mutex_lock(&pin->lock);
1603         pin->chmap_set = true;
1604         memcpy(pin->chmap, chmap, ARRAY_SIZE(pin->chmap));
1605         if (prepared)
1606                 hdac_hdmi_setup_audio_infoframe(edev, pcm->cvt->nid, pin->nid);
1607         mutex_unlock(&pin->lock);
1608 }
1609
1610 static bool is_hdac_hdmi_pcm_attached(struct hdac_device *hdac, int pcm_idx)
1611 {
1612         struct hdac_ext_device *edev = to_ehdac_device(hdac);
1613         struct hdac_hdmi_priv *hdmi = edev->private_data;
1614         struct hdac_hdmi_pcm *pcm = get_hdmi_pcm_from_id(hdmi, pcm_idx);
1615         struct hdac_hdmi_pin *pin = pcm->pin;
1616
1617         return pin ? true:false;
1618 }
1619
1620 static int hdac_hdmi_get_spk_alloc(struct hdac_device *hdac, int pcm_idx)
1621 {
1622         struct hdac_ext_device *edev = to_ehdac_device(hdac);
1623         struct hdac_hdmi_priv *hdmi = edev->private_data;
1624         struct hdac_hdmi_pcm *pcm = get_hdmi_pcm_from_id(hdmi, pcm_idx);
1625         struct hdac_hdmi_pin *pin = pcm->pin;
1626
1627         if (!pin || !pin->eld.eld_valid)
1628                 return 0;
1629
1630         return pin->eld.info.spk_alloc;
1631 }
1632
1633 static int hdac_hdmi_dev_probe(struct hdac_ext_device *edev)
1634 {
1635         struct hdac_device *codec = &edev->hdac;
1636         struct hdac_hdmi_priv *hdmi_priv;
1637         struct snd_soc_dai_driver *hdmi_dais = NULL;
1638         struct hdac_ext_link *hlink = NULL;
1639         int num_dais = 0;
1640         int ret = 0;
1641
1642         /* hold the ref while we probe */
1643         hlink = snd_hdac_ext_bus_get_link(edev->ebus, dev_name(&edev->hdac.dev));
1644         if (!hlink) {
1645                 dev_err(&edev->hdac.dev, "hdac link not found\n");
1646                 return -EIO;
1647         }
1648
1649         snd_hdac_ext_bus_link_get(edev->ebus, hlink);
1650
1651         hdmi_priv = devm_kzalloc(&codec->dev, sizeof(*hdmi_priv), GFP_KERNEL);
1652         if (hdmi_priv == NULL)
1653                 return -ENOMEM;
1654
1655         edev->private_data = hdmi_priv;
1656         snd_hdac_register_chmap_ops(codec, &hdmi_priv->chmap);
1657         hdmi_priv->chmap.ops.get_chmap = hdac_hdmi_get_chmap;
1658         hdmi_priv->chmap.ops.set_chmap = hdac_hdmi_set_chmap;
1659         hdmi_priv->chmap.ops.is_pcm_attached = is_hdac_hdmi_pcm_attached;
1660         hdmi_priv->chmap.ops.get_spk_alloc = hdac_hdmi_get_spk_alloc;
1661
1662         dev_set_drvdata(&codec->dev, edev);
1663
1664         INIT_LIST_HEAD(&hdmi_priv->pin_list);
1665         INIT_LIST_HEAD(&hdmi_priv->cvt_list);
1666         INIT_LIST_HEAD(&hdmi_priv->pcm_list);
1667         mutex_init(&hdmi_priv->pin_mutex);
1668
1669         /*
1670          * Turned off in the runtime_suspend during the first explicit
1671          * pm_runtime_suspend call.
1672          */
1673         ret = snd_hdac_display_power(edev->hdac.bus, true);
1674         if (ret < 0) {
1675                 dev_err(&edev->hdac.dev,
1676                         "Cannot turn on display power on i915 err: %d\n",
1677                         ret);
1678                 return ret;
1679         }
1680
1681         ret = hdac_hdmi_parse_and_map_nid(edev, &hdmi_dais, &num_dais);
1682         if (ret < 0) {
1683                 dev_err(&codec->dev,
1684                         "Failed in parse and map nid with err: %d\n", ret);
1685                 return ret;
1686         }
1687
1688         /* ASoC specific initialization */
1689         ret = snd_soc_register_codec(&codec->dev, &hdmi_hda_codec,
1690                                         hdmi_dais, num_dais);
1691
1692         snd_hdac_ext_bus_link_put(edev->ebus, hlink);
1693
1694         return ret;
1695 }
1696
1697 static int hdac_hdmi_dev_remove(struct hdac_ext_device *edev)
1698 {
1699         struct hdac_hdmi_priv *hdmi = edev->private_data;
1700         struct hdac_hdmi_pin *pin, *pin_next;
1701         struct hdac_hdmi_cvt *cvt, *cvt_next;
1702         struct hdac_hdmi_pcm *pcm, *pcm_next;
1703
1704         snd_soc_unregister_codec(&edev->hdac.dev);
1705
1706         list_for_each_entry_safe(pcm, pcm_next, &hdmi->pcm_list, head) {
1707                 pcm->cvt = NULL;
1708                 pcm->pin = NULL;
1709                 list_del(&pcm->head);
1710                 kfree(pcm);
1711         }
1712
1713         list_for_each_entry_safe(cvt, cvt_next, &hdmi->cvt_list, head) {
1714                 list_del(&cvt->head);
1715                 kfree(cvt->name);
1716                 kfree(cvt);
1717         }
1718
1719         list_for_each_entry_safe(pin, pin_next, &hdmi->pin_list, head) {
1720                 list_del(&pin->head);
1721                 kfree(pin);
1722         }
1723
1724         return 0;
1725 }
1726
1727 #ifdef CONFIG_PM
1728 static int hdac_hdmi_runtime_suspend(struct device *dev)
1729 {
1730         struct hdac_ext_device *edev = to_hda_ext_device(dev);
1731         struct hdac_device *hdac = &edev->hdac;
1732         struct hdac_bus *bus = hdac->bus;
1733         struct hdac_ext_bus *ebus = hbus_to_ebus(bus);
1734         struct hdac_ext_link *hlink = NULL;
1735         int err;
1736
1737         dev_dbg(dev, "Enter: %s\n", __func__);
1738
1739         /* controller may not have been initialized for the first time */
1740         if (!bus)
1741                 return 0;
1742
1743         /*
1744          * Power down afg.
1745          * codec_read is preferred over codec_write to set the power state.
1746          * This way verb is send to set the power state and response
1747          * is received. So setting power state is ensured without using loop
1748          * to read the state.
1749          */
1750         snd_hdac_codec_read(hdac, hdac->afg, 0, AC_VERB_SET_POWER_STATE,
1751                                                         AC_PWRST_D3);
1752         err = snd_hdac_display_power(bus, false);
1753         if (err < 0) {
1754                 dev_err(bus->dev, "Cannot turn on display power on i915\n");
1755                 return err;
1756         }
1757
1758         hlink = snd_hdac_ext_bus_get_link(ebus, dev_name(dev));
1759         if (!hlink) {
1760                 dev_err(dev, "hdac link not found\n");
1761                 return -EIO;
1762         }
1763
1764         snd_hdac_ext_bus_link_put(ebus, hlink);
1765
1766         return 0;
1767 }
1768
1769 static int hdac_hdmi_runtime_resume(struct device *dev)
1770 {
1771         struct hdac_ext_device *edev = to_hda_ext_device(dev);
1772         struct hdac_device *hdac = &edev->hdac;
1773         struct hdac_bus *bus = hdac->bus;
1774         struct hdac_ext_bus *ebus = hbus_to_ebus(bus);
1775         struct hdac_ext_link *hlink = NULL;
1776         int err;
1777
1778         dev_dbg(dev, "Enter: %s\n", __func__);
1779
1780         /* controller may not have been initialized for the first time */
1781         if (!bus)
1782                 return 0;
1783
1784         hlink = snd_hdac_ext_bus_get_link(ebus, dev_name(dev));
1785         if (!hlink) {
1786                 dev_err(dev, "hdac link not found\n");
1787                 return -EIO;
1788         }
1789
1790         snd_hdac_ext_bus_link_get(ebus, hlink);
1791
1792         err = snd_hdac_display_power(bus, true);
1793         if (err < 0) {
1794                 dev_err(bus->dev, "Cannot turn on display power on i915\n");
1795                 return err;
1796         }
1797
1798         hdac_hdmi_skl_enable_all_pins(&edev->hdac);
1799         hdac_hdmi_skl_enable_dp12(&edev->hdac);
1800
1801         /* Power up afg */
1802         snd_hdac_codec_read(hdac, hdac->afg, 0, AC_VERB_SET_POWER_STATE,
1803                                                         AC_PWRST_D0);
1804
1805         return 0;
1806 }
1807 #else
1808 #define hdac_hdmi_runtime_suspend NULL
1809 #define hdac_hdmi_runtime_resume NULL
1810 #endif
1811
1812 static const struct dev_pm_ops hdac_hdmi_pm = {
1813         SET_RUNTIME_PM_OPS(hdac_hdmi_runtime_suspend, hdac_hdmi_runtime_resume, NULL)
1814         .prepare = hdmi_codec_prepare,
1815         .complete = hdmi_codec_complete,
1816 };
1817
1818 static const struct hda_device_id hdmi_list[] = {
1819         HDA_CODEC_EXT_ENTRY(0x80862809, 0x100000, "Skylake HDMI", 0),
1820         HDA_CODEC_EXT_ENTRY(0x8086280a, 0x100000, "Broxton HDMI", 0),
1821         HDA_CODEC_EXT_ENTRY(0x8086280b, 0x100000, "Kabylake HDMI", 0),
1822         {}
1823 };
1824
1825 MODULE_DEVICE_TABLE(hdaudio, hdmi_list);
1826
1827 static struct hdac_ext_driver hdmi_driver = {
1828         . hdac = {
1829                 .driver = {
1830                         .name   = "HDMI HDA Codec",
1831                         .pm = &hdac_hdmi_pm,
1832                 },
1833                 .id_table       = hdmi_list,
1834         },
1835         .probe          = hdac_hdmi_dev_probe,
1836         .remove         = hdac_hdmi_dev_remove,
1837 };
1838
1839 static int __init hdmi_init(void)
1840 {
1841         return snd_hda_ext_driver_register(&hdmi_driver);
1842 }
1843
1844 static void __exit hdmi_exit(void)
1845 {
1846         snd_hda_ext_driver_unregister(&hdmi_driver);
1847 }
1848
1849 module_init(hdmi_init);
1850 module_exit(hdmi_exit);
1851
1852 MODULE_LICENSE("GPL v2");
1853 MODULE_DESCRIPTION("HDMI HD codec");
1854 MODULE_AUTHOR("Samreen Nilofer<samreen.nilofer@intel.com>");
1855 MODULE_AUTHOR("Subhransu S. Prusty<subhransu.s.prusty@intel.com>");