ASoC: soc-pcm: Use delay set in component pointer function
[sfrench/cifs-2.6.git] / sound / soc / soc-pcm.c
1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // soc-pcm.c  --  ALSA SoC PCM
4 //
5 // Copyright 2005 Wolfson Microelectronics PLC.
6 // Copyright 2005 Openedhand Ltd.
7 // Copyright (C) 2010 Slimlogic Ltd.
8 // Copyright (C) 2010 Texas Instruments Inc.
9 //
10 // Authors: Liam Girdwood <lrg@ti.com>
11 //          Mark Brown <broonie@opensource.wolfsonmicro.com>
12
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/delay.h>
16 #include <linux/pinctrl/consumer.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/slab.h>
19 #include <linux/workqueue.h>
20 #include <linux/export.h>
21 #include <linux/debugfs.h>
22 #include <sound/core.h>
23 #include <sound/pcm.h>
24 #include <sound/pcm_params.h>
25 #include <sound/soc.h>
26 #include <sound/soc-dpcm.h>
27 #include <sound/initval.h>
28
29 #define DPCM_MAX_BE_USERS       8
30
31 /*
32  * snd_soc_dai_stream_valid() - check if a DAI supports the given stream
33  *
34  * Returns true if the DAI supports the indicated stream type.
35  */
36 static bool snd_soc_dai_stream_valid(struct snd_soc_dai *dai, int stream)
37 {
38         struct snd_soc_pcm_stream *codec_stream;
39
40         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
41                 codec_stream = &dai->driver->playback;
42         else
43                 codec_stream = &dai->driver->capture;
44
45         /* If the codec specifies any rate at all, it supports the stream. */
46         return codec_stream->rates;
47 }
48
49 /**
50  * snd_soc_runtime_activate() - Increment active count for PCM runtime components
51  * @rtd: ASoC PCM runtime that is activated
52  * @stream: Direction of the PCM stream
53  *
54  * Increments the active count for all the DAIs and components attached to a PCM
55  * runtime. Should typically be called when a stream is opened.
56  *
57  * Must be called with the rtd->pcm_mutex being held
58  */
59 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
60 {
61         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
62         int i;
63
64         lockdep_assert_held(&rtd->pcm_mutex);
65
66         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
67                 cpu_dai->playback_active++;
68                 for (i = 0; i < rtd->num_codecs; i++)
69                         rtd->codec_dais[i]->playback_active++;
70         } else {
71                 cpu_dai->capture_active++;
72                 for (i = 0; i < rtd->num_codecs; i++)
73                         rtd->codec_dais[i]->capture_active++;
74         }
75
76         cpu_dai->active++;
77         cpu_dai->component->active++;
78         for (i = 0; i < rtd->num_codecs; i++) {
79                 rtd->codec_dais[i]->active++;
80                 rtd->codec_dais[i]->component->active++;
81         }
82 }
83
84 /**
85  * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
86  * @rtd: ASoC PCM runtime that is deactivated
87  * @stream: Direction of the PCM stream
88  *
89  * Decrements the active count for all the DAIs and components attached to a PCM
90  * runtime. Should typically be called when a stream is closed.
91  *
92  * Must be called with the rtd->pcm_mutex being held
93  */
94 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
95 {
96         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
97         int i;
98
99         lockdep_assert_held(&rtd->pcm_mutex);
100
101         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
102                 cpu_dai->playback_active--;
103                 for (i = 0; i < rtd->num_codecs; i++)
104                         rtd->codec_dais[i]->playback_active--;
105         } else {
106                 cpu_dai->capture_active--;
107                 for (i = 0; i < rtd->num_codecs; i++)
108                         rtd->codec_dais[i]->capture_active--;
109         }
110
111         cpu_dai->active--;
112         cpu_dai->component->active--;
113         for (i = 0; i < rtd->num_codecs; i++) {
114                 rtd->codec_dais[i]->component->active--;
115                 rtd->codec_dais[i]->active--;
116         }
117 }
118
119 /**
120  * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
121  * @rtd: The ASoC PCM runtime that should be checked.
122  *
123  * This function checks whether the power down delay should be ignored for a
124  * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
125  * been configured to ignore the delay, or if none of the components benefits
126  * from having the delay.
127  */
128 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
129 {
130         struct snd_soc_rtdcom_list *rtdcom;
131         struct snd_soc_component *component;
132         bool ignore = true;
133
134         if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
135                 return true;
136
137         for_each_rtdcom(rtd, rtdcom) {
138                 component = rtdcom->component;
139
140                 ignore &= !component->driver->use_pmdown_time;
141         }
142
143         return ignore;
144 }
145
146 /**
147  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
148  * @substream: the pcm substream
149  * @hw: the hardware parameters
150  *
151  * Sets the substream runtime hardware parameters.
152  */
153 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
154         const struct snd_pcm_hardware *hw)
155 {
156         struct snd_pcm_runtime *runtime = substream->runtime;
157         runtime->hw.info = hw->info;
158         runtime->hw.formats = hw->formats;
159         runtime->hw.period_bytes_min = hw->period_bytes_min;
160         runtime->hw.period_bytes_max = hw->period_bytes_max;
161         runtime->hw.periods_min = hw->periods_min;
162         runtime->hw.periods_max = hw->periods_max;
163         runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
164         runtime->hw.fifo_size = hw->fifo_size;
165         return 0;
166 }
167 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
168
169 /* DPCM stream event, send event to FE and all active BEs. */
170 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
171         int event)
172 {
173         struct snd_soc_dpcm *dpcm;
174
175         list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
176
177                 struct snd_soc_pcm_runtime *be = dpcm->be;
178
179                 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
180                                 be->dai_link->name, event, dir);
181
182                 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
183                     (be->dpcm[dir].users >= 1))
184                         continue;
185
186                 snd_soc_dapm_stream_event(be, dir, event);
187         }
188
189         snd_soc_dapm_stream_event(fe, dir, event);
190
191         return 0;
192 }
193
194 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
195                                         struct snd_soc_dai *soc_dai)
196 {
197         struct snd_soc_pcm_runtime *rtd = substream->private_data;
198         int ret;
199
200         if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
201                                 rtd->dai_link->symmetric_rates)) {
202                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
203                                 soc_dai->rate);
204
205                 ret = snd_pcm_hw_constraint_single(substream->runtime,
206                                                 SNDRV_PCM_HW_PARAM_RATE,
207                                                 soc_dai->rate);
208                 if (ret < 0) {
209                         dev_err(soc_dai->dev,
210                                 "ASoC: Unable to apply rate constraint: %d\n",
211                                 ret);
212                         return ret;
213                 }
214         }
215
216         if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
217                                 rtd->dai_link->symmetric_channels)) {
218                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
219                                 soc_dai->channels);
220
221                 ret = snd_pcm_hw_constraint_single(substream->runtime,
222                                                 SNDRV_PCM_HW_PARAM_CHANNELS,
223                                                 soc_dai->channels);
224                 if (ret < 0) {
225                         dev_err(soc_dai->dev,
226                                 "ASoC: Unable to apply channel symmetry constraint: %d\n",
227                                 ret);
228                         return ret;
229                 }
230         }
231
232         if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
233                                 rtd->dai_link->symmetric_samplebits)) {
234                 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
235                                 soc_dai->sample_bits);
236
237                 ret = snd_pcm_hw_constraint_single(substream->runtime,
238                                                 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
239                                                 soc_dai->sample_bits);
240                 if (ret < 0) {
241                         dev_err(soc_dai->dev,
242                                 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
243                                 ret);
244                         return ret;
245                 }
246         }
247
248         return 0;
249 }
250
251 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
252                                 struct snd_pcm_hw_params *params)
253 {
254         struct snd_soc_pcm_runtime *rtd = substream->private_data;
255         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
256         unsigned int rate, channels, sample_bits, symmetry, i;
257
258         rate = params_rate(params);
259         channels = params_channels(params);
260         sample_bits = snd_pcm_format_physical_width(params_format(params));
261
262         /* reject unmatched parameters when applying symmetry */
263         symmetry = cpu_dai->driver->symmetric_rates ||
264                 rtd->dai_link->symmetric_rates;
265
266         for (i = 0; i < rtd->num_codecs; i++)
267                 symmetry |= rtd->codec_dais[i]->driver->symmetric_rates;
268
269         if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
270                 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
271                                 cpu_dai->rate, rate);
272                 return -EINVAL;
273         }
274
275         symmetry = cpu_dai->driver->symmetric_channels ||
276                 rtd->dai_link->symmetric_channels;
277
278         for (i = 0; i < rtd->num_codecs; i++)
279                 symmetry |= rtd->codec_dais[i]->driver->symmetric_channels;
280
281         if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
282                 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
283                                 cpu_dai->channels, channels);
284                 return -EINVAL;
285         }
286
287         symmetry = cpu_dai->driver->symmetric_samplebits ||
288                 rtd->dai_link->symmetric_samplebits;
289
290         for (i = 0; i < rtd->num_codecs; i++)
291                 symmetry |= rtd->codec_dais[i]->driver->symmetric_samplebits;
292
293         if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
294                 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
295                                 cpu_dai->sample_bits, sample_bits);
296                 return -EINVAL;
297         }
298
299         return 0;
300 }
301
302 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
303 {
304         struct snd_soc_pcm_runtime *rtd = substream->private_data;
305         struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
306         struct snd_soc_dai_link *link = rtd->dai_link;
307         unsigned int symmetry, i;
308
309         symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
310                 cpu_driver->symmetric_channels || link->symmetric_channels ||
311                 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
312
313         for (i = 0; i < rtd->num_codecs; i++)
314                 symmetry = symmetry ||
315                         rtd->codec_dais[i]->driver->symmetric_rates ||
316                         rtd->codec_dais[i]->driver->symmetric_channels ||
317                         rtd->codec_dais[i]->driver->symmetric_samplebits;
318
319         return symmetry;
320 }
321
322 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
323 {
324         struct snd_soc_pcm_runtime *rtd = substream->private_data;
325         int ret;
326
327         if (!bits)
328                 return;
329
330         ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
331         if (ret != 0)
332                 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
333                                  bits, ret);
334 }
335
336 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
337 {
338         struct snd_soc_pcm_runtime *rtd = substream->private_data;
339         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
340         struct snd_soc_dai *codec_dai;
341         int i;
342         unsigned int bits = 0, cpu_bits;
343
344         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
345                 for (i = 0; i < rtd->num_codecs; i++) {
346                         codec_dai = rtd->codec_dais[i];
347                         if (codec_dai->driver->playback.sig_bits == 0) {
348                                 bits = 0;
349                                 break;
350                         }
351                         bits = max(codec_dai->driver->playback.sig_bits, bits);
352                 }
353                 cpu_bits = cpu_dai->driver->playback.sig_bits;
354         } else {
355                 for (i = 0; i < rtd->num_codecs; i++) {
356                         codec_dai = rtd->codec_dais[i];
357                         if (codec_dai->driver->capture.sig_bits == 0) {
358                                 bits = 0;
359                                 break;
360                         }
361                         bits = max(codec_dai->driver->capture.sig_bits, bits);
362                 }
363                 cpu_bits = cpu_dai->driver->capture.sig_bits;
364         }
365
366         soc_pcm_set_msb(substream, bits);
367         soc_pcm_set_msb(substream, cpu_bits);
368 }
369
370 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
371 {
372         struct snd_pcm_runtime *runtime = substream->runtime;
373         struct snd_pcm_hardware *hw = &runtime->hw;
374         struct snd_soc_pcm_runtime *rtd = substream->private_data;
375         struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
376         struct snd_soc_dai_driver *codec_dai_drv;
377         struct snd_soc_pcm_stream *codec_stream;
378         struct snd_soc_pcm_stream *cpu_stream;
379         unsigned int chan_min = 0, chan_max = UINT_MAX;
380         unsigned int rate_min = 0, rate_max = UINT_MAX;
381         unsigned int rates = UINT_MAX;
382         u64 formats = ULLONG_MAX;
383         int i;
384
385         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
386                 cpu_stream = &cpu_dai_drv->playback;
387         else
388                 cpu_stream = &cpu_dai_drv->capture;
389
390         /* first calculate min/max only for CODECs in the DAI link */
391         for (i = 0; i < rtd->num_codecs; i++) {
392
393                 /*
394                  * Skip CODECs which don't support the current stream type.
395                  * Otherwise, since the rate, channel, and format values will
396                  * zero in that case, we would have no usable settings left,
397                  * causing the resulting setup to fail.
398                  * At least one CODEC should match, otherwise we should have
399                  * bailed out on a higher level, since there would be no
400                  * CODEC to support the transfer direction in that case.
401                  */
402                 if (!snd_soc_dai_stream_valid(rtd->codec_dais[i],
403                                               substream->stream))
404                         continue;
405
406                 codec_dai_drv = rtd->codec_dais[i]->driver;
407                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
408                         codec_stream = &codec_dai_drv->playback;
409                 else
410                         codec_stream = &codec_dai_drv->capture;
411                 chan_min = max(chan_min, codec_stream->channels_min);
412                 chan_max = min(chan_max, codec_stream->channels_max);
413                 rate_min = max(rate_min, codec_stream->rate_min);
414                 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
415                 formats &= codec_stream->formats;
416                 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
417         }
418
419         /*
420          * chan min/max cannot be enforced if there are multiple CODEC DAIs
421          * connected to a single CPU DAI, use CPU DAI's directly and let
422          * channel allocation be fixed up later
423          */
424         if (rtd->num_codecs > 1) {
425                 chan_min = cpu_stream->channels_min;
426                 chan_max = cpu_stream->channels_max;
427         }
428
429         hw->channels_min = max(chan_min, cpu_stream->channels_min);
430         hw->channels_max = min(chan_max, cpu_stream->channels_max);
431         if (hw->formats)
432                 hw->formats &= formats & cpu_stream->formats;
433         else
434                 hw->formats = formats & cpu_stream->formats;
435         hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
436
437         snd_pcm_limit_hw_rates(runtime);
438
439         hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
440         hw->rate_min = max(hw->rate_min, rate_min);
441         hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
442         hw->rate_max = min_not_zero(hw->rate_max, rate_max);
443 }
444
445 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
446                                     struct snd_soc_component *last)
447 {
448         struct snd_soc_pcm_runtime *rtd = substream->private_data;
449         struct snd_soc_rtdcom_list *rtdcom;
450         struct snd_soc_component *component;
451
452         for_each_rtdcom(rtd, rtdcom) {
453                 component = rtdcom->component;
454
455                 if (component == last)
456                         break;
457
458                 if (!component->driver->ops ||
459                     !component->driver->ops->close)
460                         continue;
461
462                 component->driver->ops->close(substream);
463         }
464
465         return 0;
466 }
467
468 /*
469  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
470  * then initialized and any private data can be allocated. This also calls
471  * startup for the cpu DAI, component, machine and codec DAI.
472  */
473 static int soc_pcm_open(struct snd_pcm_substream *substream)
474 {
475         struct snd_soc_pcm_runtime *rtd = substream->private_data;
476         struct snd_pcm_runtime *runtime = substream->runtime;
477         struct snd_soc_component *component;
478         struct snd_soc_rtdcom_list *rtdcom;
479         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
480         struct snd_soc_dai *codec_dai;
481         const char *codec_dai_name = "multicodec";
482         int i, ret = 0;
483
484         pinctrl_pm_select_default_state(cpu_dai->dev);
485         for (i = 0; i < rtd->num_codecs; i++)
486                 pinctrl_pm_select_default_state(rtd->codec_dais[i]->dev);
487
488         for_each_rtdcom(rtd, rtdcom) {
489                 component = rtdcom->component;
490
491                 pm_runtime_get_sync(component->dev);
492         }
493
494         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
495
496         /* startup the audio subsystem */
497         if (cpu_dai->driver->ops->startup) {
498                 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
499                 if (ret < 0) {
500                         dev_err(cpu_dai->dev, "ASoC: can't open interface"
501                                 " %s: %d\n", cpu_dai->name, ret);
502                         goto out;
503                 }
504         }
505
506         for_each_rtdcom(rtd, rtdcom) {
507                 component = rtdcom->component;
508
509                 if (!component->driver->ops ||
510                     !component->driver->ops->open)
511                         continue;
512
513                 ret = component->driver->ops->open(substream);
514                 if (ret < 0) {
515                         dev_err(component->dev,
516                                 "ASoC: can't open component %s: %d\n",
517                                 component->name, ret);
518                         goto component_err;
519                 }
520         }
521         component = NULL;
522
523         for (i = 0; i < rtd->num_codecs; i++) {
524                 codec_dai = rtd->codec_dais[i];
525                 if (codec_dai->driver->ops->startup) {
526                         ret = codec_dai->driver->ops->startup(substream,
527                                                               codec_dai);
528                         if (ret < 0) {
529                                 dev_err(codec_dai->dev,
530                                         "ASoC: can't open codec %s: %d\n",
531                                         codec_dai->name, ret);
532                                 goto codec_dai_err;
533                         }
534                 }
535
536                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
537                         codec_dai->tx_mask = 0;
538                 else
539                         codec_dai->rx_mask = 0;
540         }
541
542         if (rtd->dai_link->ops->startup) {
543                 ret = rtd->dai_link->ops->startup(substream);
544                 if (ret < 0) {
545                         pr_err("ASoC: %s startup failed: %d\n",
546                                rtd->dai_link->name, ret);
547                         goto machine_err;
548                 }
549         }
550
551         /* Dynamic PCM DAI links compat checks use dynamic capabilities */
552         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
553                 goto dynamic;
554
555         /* Check that the codec and cpu DAIs are compatible */
556         soc_pcm_init_runtime_hw(substream);
557
558         if (rtd->num_codecs == 1)
559                 codec_dai_name = rtd->codec_dai->name;
560
561         if (soc_pcm_has_symmetry(substream))
562                 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
563
564         ret = -EINVAL;
565         if (!runtime->hw.rates) {
566                 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
567                         codec_dai_name, cpu_dai->name);
568                 goto config_err;
569         }
570         if (!runtime->hw.formats) {
571                 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
572                         codec_dai_name, cpu_dai->name);
573                 goto config_err;
574         }
575         if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
576             runtime->hw.channels_min > runtime->hw.channels_max) {
577                 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
578                                 codec_dai_name, cpu_dai->name);
579                 goto config_err;
580         }
581
582         soc_pcm_apply_msb(substream);
583
584         /* Symmetry only applies if we've already got an active stream. */
585         if (cpu_dai->active) {
586                 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
587                 if (ret != 0)
588                         goto config_err;
589         }
590
591         for (i = 0; i < rtd->num_codecs; i++) {
592                 if (rtd->codec_dais[i]->active) {
593                         ret = soc_pcm_apply_symmetry(substream,
594                                                      rtd->codec_dais[i]);
595                         if (ret != 0)
596                                 goto config_err;
597                 }
598         }
599
600         pr_debug("ASoC: %s <-> %s info:\n",
601                         codec_dai_name, cpu_dai->name);
602         pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
603         pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
604                  runtime->hw.channels_max);
605         pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
606                  runtime->hw.rate_max);
607
608 dynamic:
609
610         snd_soc_runtime_activate(rtd, substream->stream);
611
612         mutex_unlock(&rtd->pcm_mutex);
613         return 0;
614
615 config_err:
616         if (rtd->dai_link->ops->shutdown)
617                 rtd->dai_link->ops->shutdown(substream);
618
619 machine_err:
620         i = rtd->num_codecs;
621
622 codec_dai_err:
623         while (--i >= 0) {
624                 codec_dai = rtd->codec_dais[i];
625                 if (codec_dai->driver->ops->shutdown)
626                         codec_dai->driver->ops->shutdown(substream, codec_dai);
627         }
628
629 component_err:
630         soc_pcm_components_close(substream, component);
631
632         if (cpu_dai->driver->ops->shutdown)
633                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
634 out:
635         mutex_unlock(&rtd->pcm_mutex);
636
637         for_each_rtdcom(rtd, rtdcom) {
638                 component = rtdcom->component;
639
640                 pm_runtime_mark_last_busy(component->dev);
641                 pm_runtime_put_autosuspend(component->dev);
642         }
643
644         for (i = 0; i < rtd->num_codecs; i++) {
645                 if (!rtd->codec_dais[i]->active)
646                         pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
647         }
648         if (!cpu_dai->active)
649                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
650
651         return ret;
652 }
653
654 /*
655  * Power down the audio subsystem pmdown_time msecs after close is called.
656  * This is to ensure there are no pops or clicks in between any music tracks
657  * due to DAPM power cycling.
658  */
659 static void close_delayed_work(struct work_struct *work)
660 {
661         struct snd_soc_pcm_runtime *rtd =
662                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
663         struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
664
665         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
666
667         dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
668                  codec_dai->driver->playback.stream_name,
669                  codec_dai->playback_active ? "active" : "inactive",
670                  rtd->pop_wait ? "yes" : "no");
671
672         /* are we waiting on this codec DAI stream */
673         if (rtd->pop_wait == 1) {
674                 rtd->pop_wait = 0;
675                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
676                                           SND_SOC_DAPM_STREAM_STOP);
677         }
678
679         mutex_unlock(&rtd->pcm_mutex);
680 }
681
682 /*
683  * Called by ALSA when a PCM substream is closed. Private data can be
684  * freed here. The cpu DAI, codec DAI, machine and components are also
685  * shutdown.
686  */
687 static int soc_pcm_close(struct snd_pcm_substream *substream)
688 {
689         struct snd_soc_pcm_runtime *rtd = substream->private_data;
690         struct snd_soc_component *component;
691         struct snd_soc_rtdcom_list *rtdcom;
692         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
693         struct snd_soc_dai *codec_dai;
694         int i;
695
696         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
697
698         snd_soc_runtime_deactivate(rtd, substream->stream);
699
700         /* clear the corresponding DAIs rate when inactive */
701         if (!cpu_dai->active)
702                 cpu_dai->rate = 0;
703
704         for (i = 0; i < rtd->num_codecs; i++) {
705                 codec_dai = rtd->codec_dais[i];
706                 if (!codec_dai->active)
707                         codec_dai->rate = 0;
708         }
709
710         snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
711
712         if (cpu_dai->driver->ops->shutdown)
713                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
714
715         for (i = 0; i < rtd->num_codecs; i++) {
716                 codec_dai = rtd->codec_dais[i];
717                 if (codec_dai->driver->ops->shutdown)
718                         codec_dai->driver->ops->shutdown(substream, codec_dai);
719         }
720
721         if (rtd->dai_link->ops->shutdown)
722                 rtd->dai_link->ops->shutdown(substream);
723
724         soc_pcm_components_close(substream, NULL);
725
726         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
727                 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
728                         /* powered down playback stream now */
729                         snd_soc_dapm_stream_event(rtd,
730                                                   SNDRV_PCM_STREAM_PLAYBACK,
731                                                   SND_SOC_DAPM_STREAM_STOP);
732                 } else {
733                         /* start delayed pop wq here for playback streams */
734                         rtd->pop_wait = 1;
735                         queue_delayed_work(system_power_efficient_wq,
736                                            &rtd->delayed_work,
737                                            msecs_to_jiffies(rtd->pmdown_time));
738                 }
739         } else {
740                 /* capture streams can be powered down now */
741                 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
742                                           SND_SOC_DAPM_STREAM_STOP);
743         }
744
745         mutex_unlock(&rtd->pcm_mutex);
746
747         for_each_rtdcom(rtd, rtdcom) {
748                 component = rtdcom->component;
749
750                 pm_runtime_mark_last_busy(component->dev);
751                 pm_runtime_put_autosuspend(component->dev);
752         }
753
754         for (i = 0; i < rtd->num_codecs; i++) {
755                 if (!rtd->codec_dais[i]->active)
756                         pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
757         }
758         if (!cpu_dai->active)
759                 pinctrl_pm_select_sleep_state(cpu_dai->dev);
760
761         return 0;
762 }
763
764 /*
765  * Called by ALSA when the PCM substream is prepared, can set format, sample
766  * rate, etc.  This function is non atomic and can be called multiple times,
767  * it can refer to the runtime info.
768  */
769 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
770 {
771         struct snd_soc_pcm_runtime *rtd = substream->private_data;
772         struct snd_soc_component *component;
773         struct snd_soc_rtdcom_list *rtdcom;
774         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
775         struct snd_soc_dai *codec_dai;
776         int i, ret = 0;
777
778         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
779
780         if (rtd->dai_link->ops->prepare) {
781                 ret = rtd->dai_link->ops->prepare(substream);
782                 if (ret < 0) {
783                         dev_err(rtd->card->dev, "ASoC: machine prepare error:"
784                                 " %d\n", ret);
785                         goto out;
786                 }
787         }
788
789         for_each_rtdcom(rtd, rtdcom) {
790                 component = rtdcom->component;
791
792                 if (!component->driver->ops ||
793                     !component->driver->ops->prepare)
794                         continue;
795
796                 ret = component->driver->ops->prepare(substream);
797                 if (ret < 0) {
798                         dev_err(component->dev,
799                                 "ASoC: platform prepare error: %d\n", ret);
800                         goto out;
801                 }
802         }
803
804         for (i = 0; i < rtd->num_codecs; i++) {
805                 codec_dai = rtd->codec_dais[i];
806                 if (codec_dai->driver->ops->prepare) {
807                         ret = codec_dai->driver->ops->prepare(substream,
808                                                               codec_dai);
809                         if (ret < 0) {
810                                 dev_err(codec_dai->dev,
811                                         "ASoC: codec DAI prepare error: %d\n",
812                                         ret);
813                                 goto out;
814                         }
815                 }
816         }
817
818         if (cpu_dai->driver->ops->prepare) {
819                 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
820                 if (ret < 0) {
821                         dev_err(cpu_dai->dev,
822                                 "ASoC: cpu DAI prepare error: %d\n", ret);
823                         goto out;
824                 }
825         }
826
827         /* cancel any delayed stream shutdown that is pending */
828         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
829             rtd->pop_wait) {
830                 rtd->pop_wait = 0;
831                 cancel_delayed_work(&rtd->delayed_work);
832         }
833
834         snd_soc_dapm_stream_event(rtd, substream->stream,
835                         SND_SOC_DAPM_STREAM_START);
836
837         for (i = 0; i < rtd->num_codecs; i++)
838                 snd_soc_dai_digital_mute(rtd->codec_dais[i], 0,
839                                          substream->stream);
840         snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
841
842 out:
843         mutex_unlock(&rtd->pcm_mutex);
844         return ret;
845 }
846
847 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
848                                        unsigned int mask)
849 {
850         struct snd_interval *interval;
851         int channels = hweight_long(mask);
852
853         interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
854         interval->min = channels;
855         interval->max = channels;
856 }
857
858 int soc_dai_hw_params(struct snd_pcm_substream *substream,
859                       struct snd_pcm_hw_params *params,
860                       struct snd_soc_dai *dai)
861 {
862         struct snd_soc_pcm_runtime *rtd = substream->private_data;
863         int ret;
864
865         /* perform any topology hw_params fixups before DAI  */
866         if (rtd->dai_link->be_hw_params_fixup) {
867                 ret = rtd->dai_link->be_hw_params_fixup(rtd, params);
868                 if (ret < 0) {
869                         dev_err(rtd->dev,
870                                 "ASoC: hw_params topology fixup failed %d\n",
871                                 ret);
872                         return ret;
873                 }
874         }
875
876         if (dai->driver->ops->hw_params) {
877                 ret = dai->driver->ops->hw_params(substream, params, dai);
878                 if (ret < 0) {
879                         dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
880                                 dai->name, ret);
881                         return ret;
882                 }
883         }
884
885         return 0;
886 }
887
888 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
889                                       struct snd_soc_component *last)
890 {
891         struct snd_soc_pcm_runtime *rtd = substream->private_data;
892         struct snd_soc_rtdcom_list *rtdcom;
893         struct snd_soc_component *component;
894
895         for_each_rtdcom(rtd, rtdcom) {
896                 component = rtdcom->component;
897
898                 if (component == last)
899                         break;
900
901                 if (!component->driver->ops ||
902                     !component->driver->ops->hw_free)
903                         continue;
904
905                 component->driver->ops->hw_free(substream);
906         }
907
908         return 0;
909 }
910
911 /*
912  * Called by ALSA when the hardware params are set by application. This
913  * function can also be called multiple times and can allocate buffers
914  * (using snd_pcm_lib_* ). It's non-atomic.
915  */
916 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
917                                 struct snd_pcm_hw_params *params)
918 {
919         struct snd_soc_pcm_runtime *rtd = substream->private_data;
920         struct snd_soc_component *component;
921         struct snd_soc_rtdcom_list *rtdcom;
922         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
923         int i, ret = 0;
924
925         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
926         if (rtd->dai_link->ops->hw_params) {
927                 ret = rtd->dai_link->ops->hw_params(substream, params);
928                 if (ret < 0) {
929                         dev_err(rtd->card->dev, "ASoC: machine hw_params"
930                                 " failed: %d\n", ret);
931                         goto out;
932                 }
933         }
934
935         for (i = 0; i < rtd->num_codecs; i++) {
936                 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
937                 struct snd_pcm_hw_params codec_params;
938
939                 /*
940                  * Skip CODECs which don't support the current stream type,
941                  * the idea being that if a CODEC is not used for the currently
942                  * set up transfer direction, it should not need to be
943                  * configured, especially since the configuration used might
944                  * not even be supported by that CODEC. There may be cases
945                  * however where a CODEC needs to be set up although it is
946                  * actually not being used for the transfer, e.g. if a
947                  * capture-only CODEC is acting as an LRCLK and/or BCLK master
948                  * for the DAI link including a playback-only CODEC.
949                  * If this becomes necessary, we will have to augment the
950                  * machine driver setup with information on how to act, so
951                  * we can do the right thing here.
952                  */
953                 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
954                         continue;
955
956                 /* copy params for each codec */
957                 codec_params = *params;
958
959                 /* fixup params based on TDM slot masks */
960                 if (codec_dai->tx_mask)
961                         soc_pcm_codec_params_fixup(&codec_params,
962                                                    codec_dai->tx_mask);
963                 if (codec_dai->rx_mask)
964                         soc_pcm_codec_params_fixup(&codec_params,
965                                                    codec_dai->rx_mask);
966
967                 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
968                 if(ret < 0)
969                         goto codec_err;
970
971                 codec_dai->rate = params_rate(&codec_params);
972                 codec_dai->channels = params_channels(&codec_params);
973                 codec_dai->sample_bits = snd_pcm_format_physical_width(
974                                                 params_format(&codec_params));
975         }
976
977         ret = soc_dai_hw_params(substream, params, cpu_dai);
978         if (ret < 0)
979                 goto interface_err;
980
981         for_each_rtdcom(rtd, rtdcom) {
982                 component = rtdcom->component;
983
984                 if (!component->driver->ops ||
985                     !component->driver->ops->hw_params)
986                         continue;
987
988                 ret = component->driver->ops->hw_params(substream, params);
989                 if (ret < 0) {
990                         dev_err(component->dev,
991                                 "ASoC: %s hw params failed: %d\n",
992                                 component->name, ret);
993                         goto component_err;
994                 }
995         }
996         component = NULL;
997
998         /* store the parameters for each DAIs */
999         cpu_dai->rate = params_rate(params);
1000         cpu_dai->channels = params_channels(params);
1001         cpu_dai->sample_bits =
1002                 snd_pcm_format_physical_width(params_format(params));
1003
1004         ret = soc_pcm_params_symmetry(substream, params);
1005         if (ret)
1006                 goto component_err;
1007 out:
1008         mutex_unlock(&rtd->pcm_mutex);
1009         return ret;
1010
1011 component_err:
1012         soc_pcm_components_hw_free(substream, component);
1013
1014         if (cpu_dai->driver->ops->hw_free)
1015                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1016
1017 interface_err:
1018         i = rtd->num_codecs;
1019
1020 codec_err:
1021         while (--i >= 0) {
1022                 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
1023                 if (codec_dai->driver->ops->hw_free)
1024                         codec_dai->driver->ops->hw_free(substream, codec_dai);
1025                 codec_dai->rate = 0;
1026         }
1027
1028         if (rtd->dai_link->ops->hw_free)
1029                 rtd->dai_link->ops->hw_free(substream);
1030
1031         mutex_unlock(&rtd->pcm_mutex);
1032         return ret;
1033 }
1034
1035 /*
1036  * Frees resources allocated by hw_params, can be called multiple times
1037  */
1038 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
1039 {
1040         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1041         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1042         struct snd_soc_dai *codec_dai;
1043         bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
1044         int i;
1045
1046         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
1047
1048         /* clear the corresponding DAIs parameters when going to be inactive */
1049         if (cpu_dai->active == 1) {
1050                 cpu_dai->rate = 0;
1051                 cpu_dai->channels = 0;
1052                 cpu_dai->sample_bits = 0;
1053         }
1054
1055         for (i = 0; i < rtd->num_codecs; i++) {
1056                 codec_dai = rtd->codec_dais[i];
1057                 if (codec_dai->active == 1) {
1058                         codec_dai->rate = 0;
1059                         codec_dai->channels = 0;
1060                         codec_dai->sample_bits = 0;
1061                 }
1062         }
1063
1064         /* apply codec digital mute */
1065         for (i = 0; i < rtd->num_codecs; i++) {
1066                 if ((playback && rtd->codec_dais[i]->playback_active == 1) ||
1067                     (!playback && rtd->codec_dais[i]->capture_active == 1))
1068                         snd_soc_dai_digital_mute(rtd->codec_dais[i], 1,
1069                                                  substream->stream);
1070         }
1071
1072         /* free any machine hw params */
1073         if (rtd->dai_link->ops->hw_free)
1074                 rtd->dai_link->ops->hw_free(substream);
1075
1076         /* free any component resources */
1077         soc_pcm_components_hw_free(substream, NULL);
1078
1079         /* now free hw params for the DAIs  */
1080         for (i = 0; i < rtd->num_codecs; i++) {
1081                 codec_dai = rtd->codec_dais[i];
1082                 if (codec_dai->driver->ops->hw_free)
1083                         codec_dai->driver->ops->hw_free(substream, codec_dai);
1084         }
1085
1086         if (cpu_dai->driver->ops->hw_free)
1087                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1088
1089         mutex_unlock(&rtd->pcm_mutex);
1090         return 0;
1091 }
1092
1093 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1094 {
1095         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1096         struct snd_soc_component *component;
1097         struct snd_soc_rtdcom_list *rtdcom;
1098         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1099         struct snd_soc_dai *codec_dai;
1100         int i, ret;
1101
1102         for (i = 0; i < rtd->num_codecs; i++) {
1103                 codec_dai = rtd->codec_dais[i];
1104                 if (codec_dai->driver->ops->trigger) {
1105                         ret = codec_dai->driver->ops->trigger(substream,
1106                                                               cmd, codec_dai);
1107                         if (ret < 0)
1108                                 return ret;
1109                 }
1110         }
1111
1112         for_each_rtdcom(rtd, rtdcom) {
1113                 component = rtdcom->component;
1114
1115                 if (!component->driver->ops ||
1116                     !component->driver->ops->trigger)
1117                         continue;
1118
1119                 ret = component->driver->ops->trigger(substream, cmd);
1120                 if (ret < 0)
1121                         return ret;
1122         }
1123
1124         if (cpu_dai->driver->ops->trigger) {
1125                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
1126                 if (ret < 0)
1127                         return ret;
1128         }
1129
1130         if (rtd->dai_link->ops->trigger) {
1131                 ret = rtd->dai_link->ops->trigger(substream, cmd);
1132                 if (ret < 0)
1133                         return ret;
1134         }
1135
1136         return 0;
1137 }
1138
1139 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1140                                    int cmd)
1141 {
1142         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1143         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1144         struct snd_soc_dai *codec_dai;
1145         int i, ret;
1146
1147         for (i = 0; i < rtd->num_codecs; i++) {
1148                 codec_dai = rtd->codec_dais[i];
1149                 if (codec_dai->driver->ops->bespoke_trigger) {
1150                         ret = codec_dai->driver->ops->bespoke_trigger(substream,
1151                                                                 cmd, codec_dai);
1152                         if (ret < 0)
1153                                 return ret;
1154                 }
1155         }
1156
1157         if (cpu_dai->driver->ops->bespoke_trigger) {
1158                 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1159                 if (ret < 0)
1160                         return ret;
1161         }
1162         return 0;
1163 }
1164 /*
1165  * soc level wrapper for pointer callback
1166  * If cpu_dai, codec_dai, component driver has the delay callback, then
1167  * the runtime->delay will be updated accordingly.
1168  */
1169 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1170 {
1171         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1172         struct snd_soc_component *component;
1173         struct snd_soc_rtdcom_list *rtdcom;
1174         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1175         struct snd_soc_dai *codec_dai;
1176         struct snd_pcm_runtime *runtime = substream->runtime;
1177         snd_pcm_uframes_t offset = 0;
1178         snd_pcm_sframes_t delay = 0;
1179         snd_pcm_sframes_t codec_delay = 0;
1180         int i;
1181
1182         /* clearing the previous total delay */
1183         runtime->delay = 0;
1184
1185         for_each_rtdcom(rtd, rtdcom) {
1186                 component = rtdcom->component;
1187
1188                 if (!component->driver->ops ||
1189                     !component->driver->ops->pointer)
1190                         continue;
1191
1192                 /* FIXME: use 1st pointer */
1193                 offset = component->driver->ops->pointer(substream);
1194                 break;
1195         }
1196         /* base delay if assigned in pointer callback */
1197         delay = runtime->delay;
1198
1199         if (cpu_dai->driver->ops->delay)
1200                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1201
1202         for (i = 0; i < rtd->num_codecs; i++) {
1203                 codec_dai = rtd->codec_dais[i];
1204                 if (codec_dai->driver->ops->delay)
1205                         codec_delay = max(codec_delay,
1206                                         codec_dai->driver->ops->delay(substream,
1207                                                                     codec_dai));
1208         }
1209         delay += codec_delay;
1210
1211         runtime->delay = delay;
1212
1213         return offset;
1214 }
1215
1216 /* connect a FE and BE */
1217 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1218                 struct snd_soc_pcm_runtime *be, int stream)
1219 {
1220         struct snd_soc_dpcm *dpcm;
1221
1222         /* only add new dpcms */
1223         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1224                 if (dpcm->be == be && dpcm->fe == fe)
1225                         return 0;
1226         }
1227
1228         dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1229         if (!dpcm)
1230                 return -ENOMEM;
1231
1232         dpcm->be = be;
1233         dpcm->fe = fe;
1234         be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1235         dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1236         list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1237         list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1238
1239         dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1240                         stream ? "capture" : "playback",  fe->dai_link->name,
1241                         stream ? "<-" : "->", be->dai_link->name);
1242
1243 #ifdef CONFIG_DEBUG_FS
1244         if (fe->debugfs_dpcm_root)
1245                 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1246                                 fe->debugfs_dpcm_root, &dpcm->state);
1247 #endif
1248         return 1;
1249 }
1250
1251 /* reparent a BE onto another FE */
1252 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1253                         struct snd_soc_pcm_runtime *be, int stream)
1254 {
1255         struct snd_soc_dpcm *dpcm;
1256         struct snd_pcm_substream *fe_substream, *be_substream;
1257
1258         /* reparent if BE is connected to other FEs */
1259         if (!be->dpcm[stream].users)
1260                 return;
1261
1262         be_substream = snd_soc_dpcm_get_substream(be, stream);
1263
1264         list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
1265                 if (dpcm->fe == fe)
1266                         continue;
1267
1268                 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1269                         stream ? "capture" : "playback",
1270                         dpcm->fe->dai_link->name,
1271                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1272
1273                 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1274                 be_substream->runtime = fe_substream->runtime;
1275                 break;
1276         }
1277 }
1278
1279 /* disconnect a BE and FE */
1280 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1281 {
1282         struct snd_soc_dpcm *dpcm, *d;
1283
1284         list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
1285                 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1286                                 stream ? "capture" : "playback",
1287                                 dpcm->be->dai_link->name);
1288
1289                 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1290                         continue;
1291
1292                 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1293                         stream ? "capture" : "playback", fe->dai_link->name,
1294                         stream ? "<-" : "->", dpcm->be->dai_link->name);
1295
1296                 /* BEs still alive need new FE */
1297                 dpcm_be_reparent(fe, dpcm->be, stream);
1298
1299 #ifdef CONFIG_DEBUG_FS
1300                 debugfs_remove(dpcm->debugfs_state);
1301 #endif
1302                 list_del(&dpcm->list_be);
1303                 list_del(&dpcm->list_fe);
1304                 kfree(dpcm);
1305         }
1306 }
1307
1308 /* get BE for DAI widget and stream */
1309 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1310                 struct snd_soc_dapm_widget *widget, int stream)
1311 {
1312         struct snd_soc_pcm_runtime *be;
1313         int i;
1314
1315         dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1316
1317         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1318                 list_for_each_entry(be, &card->rtd_list, list) {
1319
1320                         if (!be->dai_link->no_pcm)
1321                                 continue;
1322
1323                         dev_dbg(card->dev, "ASoC: try BE : %s\n",
1324                                 be->cpu_dai->playback_widget ?
1325                                 be->cpu_dai->playback_widget->name : "(not set)");
1326
1327                         if (be->cpu_dai->playback_widget == widget)
1328                                 return be;
1329
1330                         for (i = 0; i < be->num_codecs; i++) {
1331                                 struct snd_soc_dai *dai = be->codec_dais[i];
1332                                 if (dai->playback_widget == widget)
1333                                         return be;
1334                         }
1335                 }
1336         } else {
1337
1338                 list_for_each_entry(be, &card->rtd_list, list) {
1339
1340                         if (!be->dai_link->no_pcm)
1341                                 continue;
1342
1343                         dev_dbg(card->dev, "ASoC: try BE %s\n",
1344                                 be->cpu_dai->capture_widget ?
1345                                 be->cpu_dai->capture_widget->name : "(not set)");
1346
1347                         if (be->cpu_dai->capture_widget == widget)
1348                                 return be;
1349
1350                         for (i = 0; i < be->num_codecs; i++) {
1351                                 struct snd_soc_dai *dai = be->codec_dais[i];
1352                                 if (dai->capture_widget == widget)
1353                                         return be;
1354                         }
1355                 }
1356         }
1357
1358         /* dai link name and stream name set correctly ? */
1359         dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1360                 stream ? "capture" : "playback", widget->name);
1361         return NULL;
1362 }
1363
1364 static inline struct snd_soc_dapm_widget *
1365         dai_get_widget(struct snd_soc_dai *dai, int stream)
1366 {
1367         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1368                 return dai->playback_widget;
1369         else
1370                 return dai->capture_widget;
1371 }
1372
1373 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1374                 struct snd_soc_dapm_widget *widget)
1375 {
1376         int i;
1377
1378         for (i = 0; i < list->num_widgets; i++) {
1379                 if (widget == list->widgets[i])
1380                         return 1;
1381         }
1382
1383         return 0;
1384 }
1385
1386 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1387                 enum snd_soc_dapm_direction dir)
1388 {
1389         struct snd_soc_card *card = widget->dapm->card;
1390         struct snd_soc_pcm_runtime *rtd;
1391         int i;
1392
1393         if (dir == SND_SOC_DAPM_DIR_OUT) {
1394                 list_for_each_entry(rtd, &card->rtd_list, list) {
1395                         if (!rtd->dai_link->no_pcm)
1396                                 continue;
1397
1398                         if (rtd->cpu_dai->playback_widget == widget)
1399                                 return true;
1400
1401                         for (i = 0; i < rtd->num_codecs; ++i) {
1402                                 struct snd_soc_dai *dai = rtd->codec_dais[i];
1403                                 if (dai->playback_widget == widget)
1404                                         return true;
1405                         }
1406                 }
1407         } else { /* SND_SOC_DAPM_DIR_IN */
1408                 list_for_each_entry(rtd, &card->rtd_list, list) {
1409                         if (!rtd->dai_link->no_pcm)
1410                                 continue;
1411
1412                         if (rtd->cpu_dai->capture_widget == widget)
1413                                 return true;
1414
1415                         for (i = 0; i < rtd->num_codecs; ++i) {
1416                                 struct snd_soc_dai *dai = rtd->codec_dais[i];
1417                                 if (dai->capture_widget == widget)
1418                                         return true;
1419                         }
1420                 }
1421         }
1422
1423         return false;
1424 }
1425
1426 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1427         int stream, struct snd_soc_dapm_widget_list **list)
1428 {
1429         struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1430         int paths;
1431
1432         /* get number of valid DAI paths and their widgets */
1433         paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1434                         dpcm_end_walk_at_be);
1435
1436         dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1437                         stream ? "capture" : "playback");
1438
1439         return paths;
1440 }
1441
1442 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1443         struct snd_soc_dapm_widget_list **list_)
1444 {
1445         struct snd_soc_dpcm *dpcm;
1446         struct snd_soc_dapm_widget_list *list = *list_;
1447         struct snd_soc_dapm_widget *widget;
1448         int prune = 0;
1449
1450         /* Destroy any old FE <--> BE connections */
1451         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1452                 unsigned int i;
1453
1454                 /* is there a valid CPU DAI widget for this BE */
1455                 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1456
1457                 /* prune the BE if it's no longer in our active list */
1458                 if (widget && widget_in_list(list, widget))
1459                         continue;
1460
1461                 /* is there a valid CODEC DAI widget for this BE */
1462                 for (i = 0; i < dpcm->be->num_codecs; i++) {
1463                         struct snd_soc_dai *dai = dpcm->be->codec_dais[i];
1464                         widget = dai_get_widget(dai, stream);
1465
1466                         /* prune the BE if it's no longer in our active list */
1467                         if (widget && widget_in_list(list, widget))
1468                                 continue;
1469                 }
1470
1471                 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1472                         stream ? "capture" : "playback",
1473                         dpcm->be->dai_link->name, fe->dai_link->name);
1474                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1475                 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1476                 prune++;
1477         }
1478
1479         dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1480         return prune;
1481 }
1482
1483 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1484         struct snd_soc_dapm_widget_list **list_)
1485 {
1486         struct snd_soc_card *card = fe->card;
1487         struct snd_soc_dapm_widget_list *list = *list_;
1488         struct snd_soc_pcm_runtime *be;
1489         int i, new = 0, err;
1490
1491         /* Create any new FE <--> BE connections */
1492         for (i = 0; i < list->num_widgets; i++) {
1493
1494                 switch (list->widgets[i]->id) {
1495                 case snd_soc_dapm_dai_in:
1496                         if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1497                                 continue;
1498                         break;
1499                 case snd_soc_dapm_dai_out:
1500                         if (stream != SNDRV_PCM_STREAM_CAPTURE)
1501                                 continue;
1502                         break;
1503                 default:
1504                         continue;
1505                 }
1506
1507                 /* is there a valid BE rtd for this widget */
1508                 be = dpcm_get_be(card, list->widgets[i], stream);
1509                 if (!be) {
1510                         dev_err(fe->dev, "ASoC: no BE found for %s\n",
1511                                         list->widgets[i]->name);
1512                         continue;
1513                 }
1514
1515                 /* make sure BE is a real BE */
1516                 if (!be->dai_link->no_pcm)
1517                         continue;
1518
1519                 /* don't connect if FE is not running */
1520                 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1521                         continue;
1522
1523                 /* newly connected FE and BE */
1524                 err = dpcm_be_connect(fe, be, stream);
1525                 if (err < 0) {
1526                         dev_err(fe->dev, "ASoC: can't connect %s\n",
1527                                 list->widgets[i]->name);
1528                         break;
1529                 } else if (err == 0) /* already connected */
1530                         continue;
1531
1532                 /* new */
1533                 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1534                 new++;
1535         }
1536
1537         dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1538         return new;
1539 }
1540
1541 /*
1542  * Find the corresponding BE DAIs that source or sink audio to this
1543  * FE substream.
1544  */
1545 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1546         int stream, struct snd_soc_dapm_widget_list **list, int new)
1547 {
1548         if (new)
1549                 return dpcm_add_paths(fe, stream, list);
1550         else
1551                 return dpcm_prune_paths(fe, stream, list);
1552 }
1553
1554 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1555 {
1556         struct snd_soc_dpcm *dpcm;
1557
1558         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1559                 dpcm->be->dpcm[stream].runtime_update =
1560                                                 SND_SOC_DPCM_UPDATE_NO;
1561 }
1562
1563 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1564         int stream)
1565 {
1566         struct snd_soc_dpcm *dpcm;
1567
1568         /* disable any enabled and non active backends */
1569         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1570
1571                 struct snd_soc_pcm_runtime *be = dpcm->be;
1572                 struct snd_pcm_substream *be_substream =
1573                         snd_soc_dpcm_get_substream(be, stream);
1574
1575                 if (be->dpcm[stream].users == 0)
1576                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1577                                 stream ? "capture" : "playback",
1578                                 be->dpcm[stream].state);
1579
1580                 if (--be->dpcm[stream].users != 0)
1581                         continue;
1582
1583                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1584                         continue;
1585
1586                 soc_pcm_close(be_substream);
1587                 be_substream->runtime = NULL;
1588                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1589         }
1590 }
1591
1592 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1593 {
1594         struct snd_soc_dpcm *dpcm;
1595         int err, count = 0;
1596
1597         /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1598         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1599
1600                 struct snd_soc_pcm_runtime *be = dpcm->be;
1601                 struct snd_pcm_substream *be_substream =
1602                         snd_soc_dpcm_get_substream(be, stream);
1603
1604                 if (!be_substream) {
1605                         dev_err(be->dev, "ASoC: no backend %s stream\n",
1606                                 stream ? "capture" : "playback");
1607                         continue;
1608                 }
1609
1610                 /* is this op for this BE ? */
1611                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1612                         continue;
1613
1614                 /* first time the dpcm is open ? */
1615                 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1616                         dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1617                                 stream ? "capture" : "playback",
1618                                 be->dpcm[stream].state);
1619
1620                 if (be->dpcm[stream].users++ != 0)
1621                         continue;
1622
1623                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1624                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1625                         continue;
1626
1627                 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1628                         stream ? "capture" : "playback", be->dai_link->name);
1629
1630                 be_substream->runtime = be->dpcm[stream].runtime;
1631                 err = soc_pcm_open(be_substream);
1632                 if (err < 0) {
1633                         dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1634                         be->dpcm[stream].users--;
1635                         if (be->dpcm[stream].users < 0)
1636                                 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1637                                         stream ? "capture" : "playback",
1638                                         be->dpcm[stream].state);
1639
1640                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1641                         goto unwind;
1642                 }
1643
1644                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1645                 count++;
1646         }
1647
1648         return count;
1649
1650 unwind:
1651         /* disable any enabled and non active backends */
1652         list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1653                 struct snd_soc_pcm_runtime *be = dpcm->be;
1654                 struct snd_pcm_substream *be_substream =
1655                         snd_soc_dpcm_get_substream(be, stream);
1656
1657                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1658                         continue;
1659
1660                 if (be->dpcm[stream].users == 0)
1661                         dev_err(be->dev, "ASoC: no users %s at close %d\n",
1662                                 stream ? "capture" : "playback",
1663                                 be->dpcm[stream].state);
1664
1665                 if (--be->dpcm[stream].users != 0)
1666                         continue;
1667
1668                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1669                         continue;
1670
1671                 soc_pcm_close(be_substream);
1672                 be_substream->runtime = NULL;
1673                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1674         }
1675
1676         return err;
1677 }
1678
1679 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1680                                  struct snd_soc_pcm_stream *stream)
1681 {
1682         runtime->hw.rate_min = stream->rate_min;
1683         runtime->hw.rate_max = stream->rate_max;
1684         runtime->hw.channels_min = stream->channels_min;
1685         runtime->hw.channels_max = stream->channels_max;
1686         if (runtime->hw.formats)
1687                 runtime->hw.formats &= stream->formats;
1688         else
1689                 runtime->hw.formats = stream->formats;
1690         runtime->hw.rates = stream->rates;
1691 }
1692
1693 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1694                                       u64 *formats)
1695 {
1696         struct snd_soc_pcm_runtime *fe = substream->private_data;
1697         struct snd_soc_dpcm *dpcm;
1698         int stream = substream->stream;
1699
1700         if (!fe->dai_link->dpcm_merged_format)
1701                 return;
1702
1703         /*
1704          * It returns merged BE codec format
1705          * if FE want to use it (= dpcm_merged_format)
1706          */
1707
1708         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1709                 struct snd_soc_pcm_runtime *be = dpcm->be;
1710                 struct snd_soc_dai_driver *codec_dai_drv;
1711                 struct snd_soc_pcm_stream *codec_stream;
1712                 int i;
1713
1714                 for (i = 0; i < be->num_codecs; i++) {
1715                         codec_dai_drv = be->codec_dais[i]->driver;
1716                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1717                                 codec_stream = &codec_dai_drv->playback;
1718                         else
1719                                 codec_stream = &codec_dai_drv->capture;
1720
1721                         *formats &= codec_stream->formats;
1722                 }
1723         }
1724 }
1725
1726 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1727                                     unsigned int *channels_min,
1728                                     unsigned int *channels_max)
1729 {
1730         struct snd_soc_pcm_runtime *fe = substream->private_data;
1731         struct snd_soc_dpcm *dpcm;
1732         int stream = substream->stream;
1733
1734         if (!fe->dai_link->dpcm_merged_chan)
1735                 return;
1736
1737         /*
1738          * It returns merged BE codec channel;
1739          * if FE want to use it (= dpcm_merged_chan)
1740          */
1741
1742         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1743                 struct snd_soc_pcm_runtime *be = dpcm->be;
1744                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1745                 struct snd_soc_dai_driver *codec_dai_drv;
1746                 struct snd_soc_pcm_stream *codec_stream;
1747                 struct snd_soc_pcm_stream *cpu_stream;
1748
1749                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1750                         cpu_stream = &cpu_dai_drv->playback;
1751                 else
1752                         cpu_stream = &cpu_dai_drv->capture;
1753
1754                 *channels_min = max(*channels_min, cpu_stream->channels_min);
1755                 *channels_max = min(*channels_max, cpu_stream->channels_max);
1756
1757                 /*
1758                  * chan min/max cannot be enforced if there are multiple CODEC
1759                  * DAIs connected to a single CPU DAI, use CPU DAI's directly
1760                  */
1761                 if (be->num_codecs == 1) {
1762                         codec_dai_drv = be->codec_dais[0]->driver;
1763
1764                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1765                                 codec_stream = &codec_dai_drv->playback;
1766                         else
1767                                 codec_stream = &codec_dai_drv->capture;
1768
1769                         *channels_min = max(*channels_min,
1770                                             codec_stream->channels_min);
1771                         *channels_max = min(*channels_max,
1772                                             codec_stream->channels_max);
1773                 }
1774         }
1775 }
1776
1777 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1778                                     unsigned int *rates,
1779                                     unsigned int *rate_min,
1780                                     unsigned int *rate_max)
1781 {
1782         struct snd_soc_pcm_runtime *fe = substream->private_data;
1783         struct snd_soc_dpcm *dpcm;
1784         int stream = substream->stream;
1785
1786         if (!fe->dai_link->dpcm_merged_rate)
1787                 return;
1788
1789         /*
1790          * It returns merged BE codec channel;
1791          * if FE want to use it (= dpcm_merged_chan)
1792          */
1793
1794         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1795                 struct snd_soc_pcm_runtime *be = dpcm->be;
1796                 struct snd_soc_dai_driver *cpu_dai_drv =  be->cpu_dai->driver;
1797                 struct snd_soc_dai_driver *codec_dai_drv;
1798                 struct snd_soc_pcm_stream *codec_stream;
1799                 struct snd_soc_pcm_stream *cpu_stream;
1800                 int i;
1801
1802                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1803                         cpu_stream = &cpu_dai_drv->playback;
1804                 else
1805                         cpu_stream = &cpu_dai_drv->capture;
1806
1807                 *rate_min = max(*rate_min, cpu_stream->rate_min);
1808                 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1809                 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1810
1811                 for (i = 0; i < be->num_codecs; i++) {
1812                         /*
1813                          * Skip CODECs which don't support the current stream
1814                          * type. See soc_pcm_init_runtime_hw() for more details
1815                          */
1816                         if (!snd_soc_dai_stream_valid(be->codec_dais[i],
1817                                                       stream))
1818                                 continue;
1819
1820                         codec_dai_drv = be->codec_dais[i]->driver;
1821                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1822                                 codec_stream = &codec_dai_drv->playback;
1823                         else
1824                                 codec_stream = &codec_dai_drv->capture;
1825
1826                         *rate_min = max(*rate_min, codec_stream->rate_min);
1827                         *rate_max = min_not_zero(*rate_max,
1828                                                  codec_stream->rate_max);
1829                         *rates = snd_pcm_rate_mask_intersect(*rates,
1830                                                 codec_stream->rates);
1831                 }
1832         }
1833 }
1834
1835 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1836 {
1837         struct snd_pcm_runtime *runtime = substream->runtime;
1838         struct snd_soc_pcm_runtime *rtd = substream->private_data;
1839         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1840         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1841
1842         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1843                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1844         else
1845                 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1846
1847         dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1848         dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1849                                 &runtime->hw.channels_max);
1850         dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1851                                 &runtime->hw.rate_min, &runtime->hw.rate_max);
1852 }
1853
1854 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1855
1856 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1857  * for avoiding the race with trigger callback.
1858  * If the state is unset and a trigger is pending while the previous operation,
1859  * process the pending trigger action here.
1860  */
1861 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1862                                      int stream, enum snd_soc_dpcm_update state)
1863 {
1864         struct snd_pcm_substream *substream =
1865                 snd_soc_dpcm_get_substream(fe, stream);
1866
1867         snd_pcm_stream_lock_irq(substream);
1868         if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1869                 dpcm_fe_dai_do_trigger(substream,
1870                                        fe->dpcm[stream].trigger_pending - 1);
1871                 fe->dpcm[stream].trigger_pending = 0;
1872         }
1873         fe->dpcm[stream].runtime_update = state;
1874         snd_pcm_stream_unlock_irq(substream);
1875 }
1876
1877 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1878                                int stream)
1879 {
1880         struct snd_soc_dpcm *dpcm;
1881         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1882         struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1883         int err;
1884
1885         /* apply symmetry for FE */
1886         if (soc_pcm_has_symmetry(fe_substream))
1887                 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1888
1889         /* Symmetry only applies if we've got an active stream. */
1890         if (fe_cpu_dai->active) {
1891                 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1892                 if (err < 0)
1893                         return err;
1894         }
1895
1896         /* apply symmetry for BE */
1897         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1898                 struct snd_soc_pcm_runtime *be = dpcm->be;
1899                 struct snd_pcm_substream *be_substream =
1900                         snd_soc_dpcm_get_substream(be, stream);
1901                 struct snd_soc_pcm_runtime *rtd = be_substream->private_data;
1902                 int i;
1903
1904                 if (rtd->dai_link->be_hw_params_fixup)
1905                         continue;
1906
1907                 if (soc_pcm_has_symmetry(be_substream))
1908                         be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1909
1910                 /* Symmetry only applies if we've got an active stream. */
1911                 if (rtd->cpu_dai->active) {
1912                         err = soc_pcm_apply_symmetry(fe_substream,
1913                                                      rtd->cpu_dai);
1914                         if (err < 0)
1915                                 return err;
1916                 }
1917
1918                 for (i = 0; i < rtd->num_codecs; i++) {
1919                         if (rtd->codec_dais[i]->active) {
1920                                 err = soc_pcm_apply_symmetry(fe_substream,
1921                                                              rtd->codec_dais[i]);
1922                                 if (err < 0)
1923                                         return err;
1924                         }
1925                 }
1926         }
1927
1928         return 0;
1929 }
1930
1931 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1932 {
1933         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1934         struct snd_pcm_runtime *runtime = fe_substream->runtime;
1935         int stream = fe_substream->stream, ret = 0;
1936
1937         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1938
1939         ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1940         if (ret < 0) {
1941                 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1942                 goto be_err;
1943         }
1944
1945         dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1946
1947         /* start the DAI frontend */
1948         ret = soc_pcm_open(fe_substream);
1949         if (ret < 0) {
1950                 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1951                 goto unwind;
1952         }
1953
1954         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1955
1956         dpcm_set_fe_runtime(fe_substream);
1957         snd_pcm_limit_hw_rates(runtime);
1958
1959         ret = dpcm_apply_symmetry(fe_substream, stream);
1960         if (ret < 0) {
1961                 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1962                         ret);
1963                 goto unwind;
1964         }
1965
1966         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1967         return 0;
1968
1969 unwind:
1970         dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1971 be_err:
1972         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1973         return ret;
1974 }
1975
1976 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1977 {
1978         struct snd_soc_dpcm *dpcm;
1979
1980         /* only shutdown BEs that are either sinks or sources to this FE DAI */
1981         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1982
1983                 struct snd_soc_pcm_runtime *be = dpcm->be;
1984                 struct snd_pcm_substream *be_substream =
1985                         snd_soc_dpcm_get_substream(be, stream);
1986
1987                 /* is this op for this BE ? */
1988                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1989                         continue;
1990
1991                 if (be->dpcm[stream].users == 0)
1992                         dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1993                                 stream ? "capture" : "playback",
1994                                 be->dpcm[stream].state);
1995
1996                 if (--be->dpcm[stream].users != 0)
1997                         continue;
1998
1999                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2000                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
2001                         soc_pcm_hw_free(be_substream);
2002                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2003                 }
2004
2005                 dev_dbg(be->dev, "ASoC: close BE %s\n",
2006                         be->dai_link->name);
2007
2008                 soc_pcm_close(be_substream);
2009                 be_substream->runtime = NULL;
2010
2011                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2012         }
2013         return 0;
2014 }
2015
2016 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2017 {
2018         struct snd_soc_pcm_runtime *fe = substream->private_data;
2019         int stream = substream->stream;
2020
2021         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2022
2023         /* shutdown the BEs */
2024         dpcm_be_dai_shutdown(fe, substream->stream);
2025
2026         dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2027
2028         /* now shutdown the frontend */
2029         soc_pcm_close(substream);
2030
2031         /* run the stream event for each BE */
2032         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2033
2034         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2035         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2036         return 0;
2037 }
2038
2039 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2040 {
2041         struct snd_soc_dpcm *dpcm;
2042
2043         /* only hw_params backends that are either sinks or sources
2044          * to this frontend DAI */
2045         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2046
2047                 struct snd_soc_pcm_runtime *be = dpcm->be;
2048                 struct snd_pcm_substream *be_substream =
2049                         snd_soc_dpcm_get_substream(be, stream);
2050
2051                 /* is this op for this BE ? */
2052                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2053                         continue;
2054
2055                 /* only free hw when no longer used - check all FEs */
2056                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2057                                 continue;
2058
2059                 /* do not free hw if this BE is used by other FE */
2060                 if (be->dpcm[stream].users > 1)
2061                         continue;
2062
2063                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2064                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2065                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2066                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2067                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2068                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2069                         continue;
2070
2071                 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2072                         be->dai_link->name);
2073
2074                 soc_pcm_hw_free(be_substream);
2075
2076                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2077         }
2078
2079         return 0;
2080 }
2081
2082 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2083 {
2084         struct snd_soc_pcm_runtime *fe = substream->private_data;
2085         int err, stream = substream->stream;
2086
2087         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2088         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2089
2090         dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2091
2092         /* call hw_free on the frontend */
2093         err = soc_pcm_hw_free(substream);
2094         if (err < 0)
2095                 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2096                         fe->dai_link->name);
2097
2098         /* only hw_params backends that are either sinks or sources
2099          * to this frontend DAI */
2100         err = dpcm_be_dai_hw_free(fe, stream);
2101
2102         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2103         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2104
2105         mutex_unlock(&fe->card->mutex);
2106         return 0;
2107 }
2108
2109 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2110 {
2111         struct snd_soc_dpcm *dpcm;
2112         int ret;
2113
2114         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2115
2116                 struct snd_soc_pcm_runtime *be = dpcm->be;
2117                 struct snd_pcm_substream *be_substream =
2118                         snd_soc_dpcm_get_substream(be, stream);
2119
2120                 /* is this op for this BE ? */
2121                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2122                         continue;
2123
2124                 /* copy params for each dpcm */
2125                 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2126                                 sizeof(struct snd_pcm_hw_params));
2127
2128                 /* perform any hw_params fixups */
2129                 if (be->dai_link->be_hw_params_fixup) {
2130                         ret = be->dai_link->be_hw_params_fixup(be,
2131                                         &dpcm->hw_params);
2132                         if (ret < 0) {
2133                                 dev_err(be->dev,
2134                                         "ASoC: hw_params BE fixup failed %d\n",
2135                                         ret);
2136                                 goto unwind;
2137                         }
2138                 }
2139
2140                 /* only allow hw_params() if no connected FEs are running */
2141                 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2142                         continue;
2143
2144                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2145                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2146                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2147                         continue;
2148
2149                 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2150                         be->dai_link->name);
2151
2152                 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2153                 if (ret < 0) {
2154                         dev_err(dpcm->be->dev,
2155                                 "ASoC: hw_params BE failed %d\n", ret);
2156                         goto unwind;
2157                 }
2158
2159                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2160         }
2161         return 0;
2162
2163 unwind:
2164         /* disable any enabled and non active backends */
2165         list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2166                 struct snd_soc_pcm_runtime *be = dpcm->be;
2167                 struct snd_pcm_substream *be_substream =
2168                         snd_soc_dpcm_get_substream(be, stream);
2169
2170                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2171                         continue;
2172
2173                 /* only allow hw_free() if no connected FEs are running */
2174                 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2175                         continue;
2176
2177                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2178                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2179                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2180                    (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2181                         continue;
2182
2183                 soc_pcm_hw_free(be_substream);
2184         }
2185
2186         return ret;
2187 }
2188
2189 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2190                                  struct snd_pcm_hw_params *params)
2191 {
2192         struct snd_soc_pcm_runtime *fe = substream->private_data;
2193         int ret, stream = substream->stream;
2194
2195         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2196         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2197
2198         memcpy(&fe->dpcm[substream->stream].hw_params, params,
2199                         sizeof(struct snd_pcm_hw_params));
2200         ret = dpcm_be_dai_hw_params(fe, substream->stream);
2201         if (ret < 0) {
2202                 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2203                 goto out;
2204         }
2205
2206         dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2207                         fe->dai_link->name, params_rate(params),
2208                         params_channels(params), params_format(params));
2209
2210         /* call hw_params on the frontend */
2211         ret = soc_pcm_hw_params(substream, params);
2212         if (ret < 0) {
2213                 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2214                 dpcm_be_dai_hw_free(fe, stream);
2215          } else
2216                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2217
2218 out:
2219         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2220         mutex_unlock(&fe->card->mutex);
2221         return ret;
2222 }
2223
2224 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2225                 struct snd_pcm_substream *substream, int cmd)
2226 {
2227         int ret;
2228
2229         dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2230                         dpcm->be->dai_link->name, cmd);
2231
2232         ret = soc_pcm_trigger(substream, cmd);
2233         if (ret < 0)
2234                 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2235
2236         return ret;
2237 }
2238
2239 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2240                                int cmd)
2241 {
2242         struct snd_soc_dpcm *dpcm;
2243         int ret = 0;
2244
2245         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2246
2247                 struct snd_soc_pcm_runtime *be = dpcm->be;
2248                 struct snd_pcm_substream *be_substream =
2249                         snd_soc_dpcm_get_substream(be, stream);
2250
2251                 /* is this op for this BE ? */
2252                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2253                         continue;
2254
2255                 switch (cmd) {
2256                 case SNDRV_PCM_TRIGGER_START:
2257                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2258                             (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2259                                 continue;
2260
2261                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2262                         if (ret)
2263                                 return ret;
2264
2265                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2266                         break;
2267                 case SNDRV_PCM_TRIGGER_RESUME:
2268                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2269                                 continue;
2270
2271                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2272                         if (ret)
2273                                 return ret;
2274
2275                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2276                         break;
2277                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2278                         if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2279                                 continue;
2280
2281                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2282                         if (ret)
2283                                 return ret;
2284
2285                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2286                         break;
2287                 case SNDRV_PCM_TRIGGER_STOP:
2288                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2289                                 continue;
2290
2291                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2292                                 continue;
2293
2294                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2295                         if (ret)
2296                                 return ret;
2297
2298                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2299                         break;
2300                 case SNDRV_PCM_TRIGGER_SUSPEND:
2301                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2302                                 continue;
2303
2304                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2305                                 continue;
2306
2307                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2308                         if (ret)
2309                                 return ret;
2310
2311                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2312                         break;
2313                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2314                         if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2315                                 continue;
2316
2317                         if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2318                                 continue;
2319
2320                         ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2321                         if (ret)
2322                                 return ret;
2323
2324                         be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2325                         break;
2326                 }
2327         }
2328
2329         return ret;
2330 }
2331 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2332
2333 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2334 {
2335         struct snd_soc_pcm_runtime *fe = substream->private_data;
2336         int stream = substream->stream, ret;
2337         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2338
2339         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2340
2341         switch (trigger) {
2342         case SND_SOC_DPCM_TRIGGER_PRE:
2343                 /* call trigger on the frontend before the backend. */
2344
2345                 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2346                                 fe->dai_link->name, cmd);
2347
2348                 ret = soc_pcm_trigger(substream, cmd);
2349                 if (ret < 0) {
2350                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2351                         goto out;
2352                 }
2353
2354                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2355                 break;
2356         case SND_SOC_DPCM_TRIGGER_POST:
2357                 /* call trigger on the frontend after the backend. */
2358
2359                 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2360                 if (ret < 0) {
2361                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2362                         goto out;
2363                 }
2364
2365                 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2366                                 fe->dai_link->name, cmd);
2367
2368                 ret = soc_pcm_trigger(substream, cmd);
2369                 break;
2370         case SND_SOC_DPCM_TRIGGER_BESPOKE:
2371                 /* bespoke trigger() - handles both FE and BEs */
2372
2373                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2374                                 fe->dai_link->name, cmd);
2375
2376                 ret = soc_pcm_bespoke_trigger(substream, cmd);
2377                 if (ret < 0) {
2378                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2379                         goto out;
2380                 }
2381                 break;
2382         default:
2383                 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2384                                 fe->dai_link->name);
2385                 ret = -EINVAL;
2386                 goto out;
2387         }
2388
2389         switch (cmd) {
2390         case SNDRV_PCM_TRIGGER_START:
2391         case SNDRV_PCM_TRIGGER_RESUME:
2392         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2393                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2394                 break;
2395         case SNDRV_PCM_TRIGGER_STOP:
2396         case SNDRV_PCM_TRIGGER_SUSPEND:
2397                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2398                 break;
2399         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2400                 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2401                 break;
2402         }
2403
2404 out:
2405         fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2406         return ret;
2407 }
2408
2409 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2410 {
2411         struct snd_soc_pcm_runtime *fe = substream->private_data;
2412         int stream = substream->stream;
2413
2414         /* if FE's runtime_update is already set, we're in race;
2415          * process this trigger later at exit
2416          */
2417         if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2418                 fe->dpcm[stream].trigger_pending = cmd + 1;
2419                 return 0; /* delayed, assuming it's successful */
2420         }
2421
2422         /* we're alone, let's trigger */
2423         return dpcm_fe_dai_do_trigger(substream, cmd);
2424 }
2425
2426 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2427 {
2428         struct snd_soc_dpcm *dpcm;
2429         int ret = 0;
2430
2431         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2432
2433                 struct snd_soc_pcm_runtime *be = dpcm->be;
2434                 struct snd_pcm_substream *be_substream =
2435                         snd_soc_dpcm_get_substream(be, stream);
2436
2437                 /* is this op for this BE ? */
2438                 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2439                         continue;
2440
2441                 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2442                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2443                     (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2444                         continue;
2445
2446                 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2447                         be->dai_link->name);
2448
2449                 ret = soc_pcm_prepare(be_substream);
2450                 if (ret < 0) {
2451                         dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2452                                 ret);
2453                         break;
2454                 }
2455
2456                 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2457         }
2458         return ret;
2459 }
2460
2461 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2462 {
2463         struct snd_soc_pcm_runtime *fe = substream->private_data;
2464         int stream = substream->stream, ret = 0;
2465
2466         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2467
2468         dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2469
2470         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2471
2472         /* there is no point preparing this FE if there are no BEs */
2473         if (list_empty(&fe->dpcm[stream].be_clients)) {
2474                 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2475                                 fe->dai_link->name);
2476                 ret = -EINVAL;
2477                 goto out;
2478         }
2479
2480         ret = dpcm_be_dai_prepare(fe, substream->stream);
2481         if (ret < 0)
2482                 goto out;
2483
2484         /* call prepare on the frontend */
2485         ret = soc_pcm_prepare(substream);
2486         if (ret < 0) {
2487                 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2488                         fe->dai_link->name);
2489                 goto out;
2490         }
2491
2492         /* run the stream event for each BE */
2493         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2494         fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2495
2496 out:
2497         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2498         mutex_unlock(&fe->card->mutex);
2499
2500         return ret;
2501 }
2502
2503 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2504                      unsigned int cmd, void *arg)
2505 {
2506         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2507         struct snd_soc_component *component;
2508         struct snd_soc_rtdcom_list *rtdcom;
2509
2510         for_each_rtdcom(rtd, rtdcom) {
2511                 component = rtdcom->component;
2512
2513                 if (!component->driver->ops ||
2514                     !component->driver->ops->ioctl)
2515                         continue;
2516
2517                 /* FIXME: use 1st ioctl */
2518                 return component->driver->ops->ioctl(substream, cmd, arg);
2519         }
2520
2521         return snd_pcm_lib_ioctl(substream, cmd, arg);
2522 }
2523
2524 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2525 {
2526         struct snd_pcm_substream *substream =
2527                 snd_soc_dpcm_get_substream(fe, stream);
2528         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2529         int err;
2530
2531         dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2532                         stream ? "capture" : "playback", fe->dai_link->name);
2533
2534         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2535                 /* call bespoke trigger - FE takes care of all BE triggers */
2536                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2537                                 fe->dai_link->name);
2538
2539                 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2540                 if (err < 0)
2541                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2542         } else {
2543                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2544                         fe->dai_link->name);
2545
2546                 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2547                 if (err < 0)
2548                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2549         }
2550
2551         err = dpcm_be_dai_hw_free(fe, stream);
2552         if (err < 0)
2553                 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2554
2555         err = dpcm_be_dai_shutdown(fe, stream);
2556         if (err < 0)
2557                 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2558
2559         /* run the stream event for each BE */
2560         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2561
2562         return 0;
2563 }
2564
2565 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2566 {
2567         struct snd_pcm_substream *substream =
2568                 snd_soc_dpcm_get_substream(fe, stream);
2569         struct snd_soc_dpcm *dpcm;
2570         enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2571         int ret;
2572
2573         dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2574                         stream ? "capture" : "playback", fe->dai_link->name);
2575
2576         /* Only start the BE if the FE is ready */
2577         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2578                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2579                 return -EINVAL;
2580
2581         /* startup must always be called for new BEs */
2582         ret = dpcm_be_dai_startup(fe, stream);
2583         if (ret < 0)
2584                 goto disconnect;
2585
2586         /* keep going if FE state is > open */
2587         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2588                 return 0;
2589
2590         ret = dpcm_be_dai_hw_params(fe, stream);
2591         if (ret < 0)
2592                 goto close;
2593
2594         /* keep going if FE state is > hw_params */
2595         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2596                 return 0;
2597
2598
2599         ret = dpcm_be_dai_prepare(fe, stream);
2600         if (ret < 0)
2601                 goto hw_free;
2602
2603         /* run the stream event for each BE */
2604         dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2605
2606         /* keep going if FE state is > prepare */
2607         if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2608                 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2609                 return 0;
2610
2611         if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2612                 /* call trigger on the frontend - FE takes care of all BE triggers */
2613                 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2614                                 fe->dai_link->name);
2615
2616                 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2617                 if (ret < 0) {
2618                         dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2619                         goto hw_free;
2620                 }
2621         } else {
2622                 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2623                         fe->dai_link->name);
2624
2625                 ret = dpcm_be_dai_trigger(fe, stream,
2626                                         SNDRV_PCM_TRIGGER_START);
2627                 if (ret < 0) {
2628                         dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2629                         goto hw_free;
2630                 }
2631         }
2632
2633         return 0;
2634
2635 hw_free:
2636         dpcm_be_dai_hw_free(fe, stream);
2637 close:
2638         dpcm_be_dai_shutdown(fe, stream);
2639 disconnect:
2640         /* disconnect any non started BEs */
2641         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2642                 struct snd_soc_pcm_runtime *be = dpcm->be;
2643                 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2644                                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2645         }
2646
2647         return ret;
2648 }
2649
2650 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2651 {
2652         int ret;
2653
2654         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2655         ret = dpcm_run_update_startup(fe, stream);
2656         if (ret < 0)
2657                 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2658         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2659
2660         return ret;
2661 }
2662
2663 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2664 {
2665         int ret;
2666
2667         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2668         ret = dpcm_run_update_shutdown(fe, stream);
2669         if (ret < 0)
2670                 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2671         dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2672
2673         return ret;
2674 }
2675
2676 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2677 {
2678         struct snd_soc_dapm_widget_list *list;
2679         int count, paths;
2680
2681         if (!fe->dai_link->dynamic)
2682                 return 0;
2683
2684         /* only check active links */
2685         if (!fe->cpu_dai->active)
2686                 return 0;
2687
2688         /* DAPM sync will call this to update DSP paths */
2689         dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2690                 new ? "new" : "old", fe->dai_link->name);
2691
2692         /* skip if FE doesn't have playback capability */
2693         if (!fe->cpu_dai->driver->playback.channels_min ||
2694             !fe->codec_dai->driver->playback.channels_min)
2695                 goto capture;
2696
2697         /* skip if FE isn't currently playing */
2698         if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2699                 goto capture;
2700
2701         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2702         if (paths < 0) {
2703                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2704                          fe->dai_link->name,  "playback");
2705                 return paths;
2706         }
2707
2708         /* update any playback paths */
2709         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2710         if (count) {
2711                 if (new)
2712                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2713                 else
2714                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2715
2716                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2717                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2718         }
2719
2720         dpcm_path_put(&list);
2721
2722 capture:
2723         /* skip if FE doesn't have capture capability */
2724         if (!fe->cpu_dai->driver->capture.channels_min ||
2725             !fe->codec_dai->driver->capture.channels_min)
2726                 return 0;
2727
2728         /* skip if FE isn't currently capturing */
2729         if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2730                 return 0;
2731
2732         paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2733         if (paths < 0) {
2734                 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2735                          fe->dai_link->name,  "capture");
2736                 return paths;
2737         }
2738
2739         /* update any old capture paths */
2740         count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2741         if (count) {
2742                 if (new)
2743                         dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2744                 else
2745                         dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2746
2747                 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2748                 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2749         }
2750
2751         dpcm_path_put(&list);
2752
2753         return 0;
2754 }
2755
2756 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2757  * any DAI links.
2758  */
2759 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2760 {
2761         struct snd_soc_pcm_runtime *fe;
2762         int ret = 0;
2763
2764         mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2765         /* shutdown all old paths first */
2766         list_for_each_entry(fe, &card->rtd_list, list) {
2767                 ret = soc_dpcm_fe_runtime_update(fe, 0);
2768                 if (ret)
2769                         goto out;
2770         }
2771
2772         /* bring new paths up */
2773         list_for_each_entry(fe, &card->rtd_list, list) {
2774                 ret = soc_dpcm_fe_runtime_update(fe, 1);
2775                 if (ret)
2776                         goto out;
2777         }
2778
2779 out:
2780         mutex_unlock(&card->mutex);
2781         return ret;
2782 }
2783 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2784 {
2785         struct snd_soc_dpcm *dpcm;
2786         struct list_head *clients =
2787                 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
2788
2789         list_for_each_entry(dpcm, clients, list_be) {
2790
2791                 struct snd_soc_pcm_runtime *be = dpcm->be;
2792                 int i;
2793
2794                 if (be->dai_link->ignore_suspend)
2795                         continue;
2796
2797                 for (i = 0; i < be->num_codecs; i++) {
2798                         struct snd_soc_dai *dai = be->codec_dais[i];
2799                         struct snd_soc_dai_driver *drv = dai->driver;
2800
2801                         dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2802                                          be->dai_link->name);
2803
2804                         if (drv->ops && drv->ops->digital_mute &&
2805                                                         dai->playback_active)
2806                                 drv->ops->digital_mute(dai, mute);
2807                 }
2808         }
2809
2810         return 0;
2811 }
2812
2813 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2814 {
2815         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2816         struct snd_soc_dpcm *dpcm;
2817         struct snd_soc_dapm_widget_list *list;
2818         int ret;
2819         int stream = fe_substream->stream;
2820
2821         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2822         fe->dpcm[stream].runtime = fe_substream->runtime;
2823
2824         ret = dpcm_path_get(fe, stream, &list);
2825         if (ret < 0) {
2826                 mutex_unlock(&fe->card->mutex);
2827                 return ret;
2828         } else if (ret == 0) {
2829                 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2830                         fe->dai_link->name, stream ? "capture" : "playback");
2831         }
2832
2833         /* calculate valid and active FE <-> BE dpcms */
2834         dpcm_process_paths(fe, stream, &list, 1);
2835
2836         ret = dpcm_fe_dai_startup(fe_substream);
2837         if (ret < 0) {
2838                 /* clean up all links */
2839                 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2840                         dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2841
2842                 dpcm_be_disconnect(fe, stream);
2843                 fe->dpcm[stream].runtime = NULL;
2844         }
2845
2846         dpcm_clear_pending_state(fe, stream);
2847         dpcm_path_put(&list);
2848         mutex_unlock(&fe->card->mutex);
2849         return ret;
2850 }
2851
2852 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2853 {
2854         struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2855         struct snd_soc_dpcm *dpcm;
2856         int stream = fe_substream->stream, ret;
2857
2858         mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2859         ret = dpcm_fe_dai_shutdown(fe_substream);
2860
2861         /* mark FE's links ready to prune */
2862         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2863                 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2864
2865         dpcm_be_disconnect(fe, stream);
2866
2867         fe->dpcm[stream].runtime = NULL;
2868         mutex_unlock(&fe->card->mutex);
2869         return ret;
2870 }
2871
2872 static void soc_pcm_private_free(struct snd_pcm *pcm)
2873 {
2874         struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2875         struct snd_soc_rtdcom_list *rtdcom;
2876         struct snd_soc_component *component;
2877
2878         /* need to sync the delayed work before releasing resources */
2879         flush_delayed_work(&rtd->delayed_work);
2880         for_each_rtdcom(rtd, rtdcom) {
2881                 component = rtdcom->component;
2882
2883                 if (component->driver->pcm_free)
2884                         component->driver->pcm_free(pcm);
2885         }
2886 }
2887
2888 static int soc_rtdcom_ack(struct snd_pcm_substream *substream)
2889 {
2890         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2891         struct snd_soc_rtdcom_list *rtdcom;
2892         struct snd_soc_component *component;
2893
2894         for_each_rtdcom(rtd, rtdcom) {
2895                 component = rtdcom->component;
2896
2897                 if (!component->driver->ops ||
2898                     !component->driver->ops->ack)
2899                         continue;
2900
2901                 /* FIXME. it returns 1st ask now */
2902                 return component->driver->ops->ack(substream);
2903         }
2904
2905         return -EINVAL;
2906 }
2907
2908 static int soc_rtdcom_copy_user(struct snd_pcm_substream *substream, int channel,
2909                                 unsigned long pos, void __user *buf,
2910                                 unsigned long bytes)
2911 {
2912         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2913         struct snd_soc_rtdcom_list *rtdcom;
2914         struct snd_soc_component *component;
2915
2916         for_each_rtdcom(rtd, rtdcom) {
2917                 component = rtdcom->component;
2918
2919                 if (!component->driver->ops ||
2920                     !component->driver->ops->copy_user)
2921                         continue;
2922
2923                 /* FIXME. it returns 1st copy now */
2924                 return component->driver->ops->copy_user(substream, channel,
2925                                                          pos, buf, bytes);
2926         }
2927
2928         return -EINVAL;
2929 }
2930
2931 static int soc_rtdcom_copy_kernel(struct snd_pcm_substream *substream, int channel,
2932                                   unsigned long pos, void *buf, unsigned long bytes)
2933 {
2934         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2935         struct snd_soc_rtdcom_list *rtdcom;
2936         struct snd_soc_component *component;
2937
2938         for_each_rtdcom(rtd, rtdcom) {
2939                 component = rtdcom->component;
2940
2941                 if (!component->driver->ops ||
2942                     !component->driver->ops->copy_kernel)
2943                         continue;
2944
2945                 /* FIXME. it returns 1st copy now */
2946                 return component->driver->ops->copy_kernel(substream, channel,
2947                                                            pos, buf, bytes);
2948         }
2949
2950         return -EINVAL;
2951 }
2952
2953 static int soc_rtdcom_fill_silence(struct snd_pcm_substream *substream, int channel,
2954                                    unsigned long pos, unsigned long bytes)
2955 {
2956         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2957         struct snd_soc_rtdcom_list *rtdcom;
2958         struct snd_soc_component *component;
2959
2960         for_each_rtdcom(rtd, rtdcom) {
2961                 component = rtdcom->component;
2962
2963                 if (!component->driver->ops ||
2964                     !component->driver->ops->fill_silence)
2965                         continue;
2966
2967                 /* FIXME. it returns 1st silence now */
2968                 return component->driver->ops->fill_silence(substream, channel,
2969                                                             pos, bytes);
2970         }
2971
2972         return -EINVAL;
2973 }
2974
2975 static struct page *soc_rtdcom_page(struct snd_pcm_substream *substream,
2976                                     unsigned long offset)
2977 {
2978         struct snd_soc_pcm_runtime *rtd = substream->private_data;
2979         struct snd_soc_rtdcom_list *rtdcom;
2980         struct snd_soc_component *component;
2981         struct page *page;
2982
2983         for_each_rtdcom(rtd, rtdcom) {
2984                 component = rtdcom->component;
2985
2986                 if (!component->driver->ops ||
2987                     !component->driver->ops->page)
2988                         continue;
2989
2990                 /* FIXME. it returns 1st page now */
2991                 page = component->driver->ops->page(substream, offset);
2992                 if (page)
2993                         return page;
2994         }
2995
2996         return NULL;
2997 }
2998
2999 static int soc_rtdcom_mmap(struct snd_pcm_substream *substream,
3000                            struct vm_area_struct *vma)
3001 {
3002         struct snd_soc_pcm_runtime *rtd = substream->private_data;
3003         struct snd_soc_rtdcom_list *rtdcom;
3004         struct snd_soc_component *component;
3005
3006         for_each_rtdcom(rtd, rtdcom) {
3007                 component = rtdcom->component;
3008
3009                 if (!component->driver->ops ||
3010                     !component->driver->ops->mmap)
3011                         continue;
3012
3013                 /* FIXME. it returns 1st mmap now */
3014                 return component->driver->ops->mmap(substream, vma);
3015         }
3016
3017         return -EINVAL;
3018 }
3019
3020 /* create a new pcm */
3021 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
3022 {
3023         struct snd_soc_dai *codec_dai;
3024         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3025         struct snd_soc_component *component;
3026         struct snd_soc_rtdcom_list *rtdcom;
3027         struct snd_pcm *pcm;
3028         char new_name[64];
3029         int ret = 0, playback = 0, capture = 0;
3030         int i;
3031
3032         if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
3033                 playback = rtd->dai_link->dpcm_playback;
3034                 capture = rtd->dai_link->dpcm_capture;
3035         } else {
3036                 for (i = 0; i < rtd->num_codecs; i++) {
3037                         codec_dai = rtd->codec_dais[i];
3038                         if (codec_dai->driver->playback.channels_min)
3039                                 playback = 1;
3040                         if (codec_dai->driver->capture.channels_min)
3041                                 capture = 1;
3042                 }
3043
3044                 capture = capture && cpu_dai->driver->capture.channels_min;
3045                 playback = playback && cpu_dai->driver->playback.channels_min;
3046         }
3047
3048         if (rtd->dai_link->playback_only) {
3049                 playback = 1;
3050                 capture = 0;
3051         }
3052
3053         if (rtd->dai_link->capture_only) {
3054                 playback = 0;
3055                 capture = 1;
3056         }
3057
3058         /* create the PCM */
3059         if (rtd->dai_link->no_pcm) {
3060                 snprintf(new_name, sizeof(new_name), "(%s)",
3061                         rtd->dai_link->stream_name);
3062
3063                 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
3064                                 playback, capture, &pcm);
3065         } else {
3066                 if (rtd->dai_link->dynamic)
3067                         snprintf(new_name, sizeof(new_name), "%s (*)",
3068                                 rtd->dai_link->stream_name);
3069                 else
3070                         snprintf(new_name, sizeof(new_name), "%s %s-%d",
3071                                 rtd->dai_link->stream_name,
3072                                 (rtd->num_codecs > 1) ?
3073                                 "multicodec" : rtd->codec_dai->name, num);
3074
3075                 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
3076                         capture, &pcm);
3077         }
3078         if (ret < 0) {
3079                 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
3080                         rtd->dai_link->name);
3081                 return ret;
3082         }
3083         dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
3084
3085         /* DAPM dai link stream work */
3086         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
3087
3088         pcm->nonatomic = rtd->dai_link->nonatomic;
3089         rtd->pcm = pcm;
3090         pcm->private_data = rtd;
3091
3092         if (rtd->dai_link->no_pcm) {
3093                 if (playback)
3094                         pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
3095                 if (capture)
3096                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
3097                 goto out;
3098         }
3099
3100         /* ASoC PCM operations */
3101         if (rtd->dai_link->dynamic) {
3102                 rtd->ops.open           = dpcm_fe_dai_open;
3103                 rtd->ops.hw_params      = dpcm_fe_dai_hw_params;
3104                 rtd->ops.prepare        = dpcm_fe_dai_prepare;
3105                 rtd->ops.trigger        = dpcm_fe_dai_trigger;
3106                 rtd->ops.hw_free        = dpcm_fe_dai_hw_free;
3107                 rtd->ops.close          = dpcm_fe_dai_close;
3108                 rtd->ops.pointer        = soc_pcm_pointer;
3109                 rtd->ops.ioctl          = soc_pcm_ioctl;
3110         } else {
3111                 rtd->ops.open           = soc_pcm_open;
3112                 rtd->ops.hw_params      = soc_pcm_hw_params;
3113                 rtd->ops.prepare        = soc_pcm_prepare;
3114                 rtd->ops.trigger        = soc_pcm_trigger;
3115                 rtd->ops.hw_free        = soc_pcm_hw_free;
3116                 rtd->ops.close          = soc_pcm_close;
3117                 rtd->ops.pointer        = soc_pcm_pointer;
3118                 rtd->ops.ioctl          = soc_pcm_ioctl;
3119         }
3120
3121         for_each_rtdcom(rtd, rtdcom) {
3122                 const struct snd_pcm_ops *ops = rtdcom->component->driver->ops;
3123
3124                 if (!ops)
3125                         continue;
3126
3127                 if (ops->ack)
3128                         rtd->ops.ack            = soc_rtdcom_ack;
3129                 if (ops->copy_user)
3130                         rtd->ops.copy_user      = soc_rtdcom_copy_user;
3131                 if (ops->copy_kernel)
3132                         rtd->ops.copy_kernel    = soc_rtdcom_copy_kernel;
3133                 if (ops->fill_silence)
3134                         rtd->ops.fill_silence   = soc_rtdcom_fill_silence;
3135                 if (ops->page)
3136                         rtd->ops.page           = soc_rtdcom_page;
3137                 if (ops->mmap)
3138                         rtd->ops.mmap           = soc_rtdcom_mmap;
3139         }
3140
3141         if (playback)
3142                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3143
3144         if (capture)
3145                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3146
3147         for_each_rtdcom(rtd, rtdcom) {
3148                 component = rtdcom->component;
3149
3150                 if (!component->driver->pcm_new)
3151                         continue;
3152
3153                 ret = component->driver->pcm_new(rtd);
3154                 if (ret < 0) {
3155                         dev_err(component->dev,
3156                                 "ASoC: pcm constructor failed: %d\n",
3157                                 ret);
3158                         return ret;
3159                 }
3160         }
3161
3162         pcm->private_free = soc_pcm_private_free;
3163 out:
3164         dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3165                  (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3166                  cpu_dai->name);
3167         return ret;
3168 }
3169
3170 /* is the current PCM operation for this FE ? */
3171 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3172 {
3173         if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3174                 return 1;
3175         return 0;
3176 }
3177 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3178
3179 /* is the current PCM operation for this BE ? */
3180 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3181                 struct snd_soc_pcm_runtime *be, int stream)
3182 {
3183         if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3184            ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3185                   be->dpcm[stream].runtime_update))
3186                 return 1;
3187         return 0;
3188 }
3189 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3190
3191 /* get the substream for this BE */
3192 struct snd_pcm_substream *
3193         snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3194 {
3195         return be->pcm->streams[stream].substream;
3196 }
3197 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3198
3199 /* get the BE runtime state */
3200 enum snd_soc_dpcm_state
3201         snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3202 {
3203         return be->dpcm[stream].state;
3204 }
3205 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3206
3207 /* set the BE runtime state */
3208 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3209                 int stream, enum snd_soc_dpcm_state state)
3210 {
3211         be->dpcm[stream].state = state;
3212 }
3213 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3214
3215 /*
3216  * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3217  * are not running, paused or suspended for the specified stream direction.
3218  */
3219 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3220                 struct snd_soc_pcm_runtime *be, int stream)
3221 {
3222         struct snd_soc_dpcm *dpcm;
3223         int state;
3224
3225         list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
3226
3227                 if (dpcm->fe == fe)
3228                         continue;
3229
3230                 state = dpcm->fe->dpcm[stream].state;
3231                 if (state == SND_SOC_DPCM_STATE_START ||
3232                         state == SND_SOC_DPCM_STATE_PAUSED ||
3233                         state == SND_SOC_DPCM_STATE_SUSPEND)
3234                         return 0;
3235         }
3236
3237         /* it's safe to free/stop this BE DAI */
3238         return 1;
3239 }
3240 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3241
3242 /*
3243  * We can only change hw params a BE DAI if any of it's FE are not prepared,
3244  * running, paused or suspended for the specified stream direction.
3245  */
3246 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3247                 struct snd_soc_pcm_runtime *be, int stream)
3248 {
3249         struct snd_soc_dpcm *dpcm;
3250         int state;
3251
3252         list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
3253
3254                 if (dpcm->fe == fe)
3255                         continue;
3256
3257                 state = dpcm->fe->dpcm[stream].state;
3258                 if (state == SND_SOC_DPCM_STATE_START ||
3259                         state == SND_SOC_DPCM_STATE_PAUSED ||
3260                         state == SND_SOC_DPCM_STATE_SUSPEND ||
3261                         state == SND_SOC_DPCM_STATE_PREPARE)
3262                         return 0;
3263         }
3264
3265         /* it's safe to change hw_params */
3266         return 1;
3267 }
3268 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3269
3270 #ifdef CONFIG_DEBUG_FS
3271 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3272 {
3273         switch (state) {
3274         case SND_SOC_DPCM_STATE_NEW:
3275                 return "new";
3276         case SND_SOC_DPCM_STATE_OPEN:
3277                 return "open";
3278         case SND_SOC_DPCM_STATE_HW_PARAMS:
3279                 return "hw_params";
3280         case SND_SOC_DPCM_STATE_PREPARE:
3281                 return "prepare";
3282         case SND_SOC_DPCM_STATE_START:
3283                 return "start";
3284         case SND_SOC_DPCM_STATE_STOP:
3285                 return "stop";
3286         case SND_SOC_DPCM_STATE_SUSPEND:
3287                 return "suspend";
3288         case SND_SOC_DPCM_STATE_PAUSED:
3289                 return "paused";
3290         case SND_SOC_DPCM_STATE_HW_FREE:
3291                 return "hw_free";
3292         case SND_SOC_DPCM_STATE_CLOSE:
3293                 return "close";
3294         }
3295
3296         return "unknown";
3297 }
3298
3299 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3300                                 int stream, char *buf, size_t size)
3301 {
3302         struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3303         struct snd_soc_dpcm *dpcm;
3304         ssize_t offset = 0;
3305
3306         /* FE state */
3307         offset += snprintf(buf + offset, size - offset,
3308                         "[%s - %s]\n", fe->dai_link->name,
3309                         stream ? "Capture" : "Playback");
3310
3311         offset += snprintf(buf + offset, size - offset, "State: %s\n",
3312                         dpcm_state_string(fe->dpcm[stream].state));
3313
3314         if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3315             (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3316                 offset += snprintf(buf + offset, size - offset,
3317                                 "Hardware Params: "
3318                                 "Format = %s, Channels = %d, Rate = %d\n",
3319                                 snd_pcm_format_name(params_format(params)),
3320                                 params_channels(params),
3321                                 params_rate(params));
3322
3323         /* BEs state */
3324         offset += snprintf(buf + offset, size - offset, "Backends:\n");
3325
3326         if (list_empty(&fe->dpcm[stream].be_clients)) {
3327                 offset += snprintf(buf + offset, size - offset,
3328                                 " No active DSP links\n");
3329                 goto out;
3330         }
3331
3332         list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
3333                 struct snd_soc_pcm_runtime *be = dpcm->be;
3334                 params = &dpcm->hw_params;
3335
3336                 offset += snprintf(buf + offset, size - offset,
3337                                 "- %s\n", be->dai_link->name);
3338
3339                 offset += snprintf(buf + offset, size - offset,
3340                                 "   State: %s\n",
3341                                 dpcm_state_string(be->dpcm[stream].state));
3342
3343                 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3344                     (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3345                         offset += snprintf(buf + offset, size - offset,
3346                                 "   Hardware Params: "
3347                                 "Format = %s, Channels = %d, Rate = %d\n",
3348                                 snd_pcm_format_name(params_format(params)),
3349                                 params_channels(params),
3350                                 params_rate(params));
3351         }
3352
3353 out:
3354         return offset;
3355 }
3356
3357 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3358                                 size_t count, loff_t *ppos)
3359 {
3360         struct snd_soc_pcm_runtime *fe = file->private_data;
3361         ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3362         char *buf;
3363
3364         buf = kmalloc(out_count, GFP_KERNEL);
3365         if (!buf)
3366                 return -ENOMEM;
3367
3368         if (fe->cpu_dai->driver->playback.channels_min)
3369                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3370                                         buf + offset, out_count - offset);
3371
3372         if (fe->cpu_dai->driver->capture.channels_min)
3373                 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3374                                         buf + offset, out_count - offset);
3375
3376         ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3377
3378         kfree(buf);
3379         return ret;
3380 }
3381
3382 static const struct file_operations dpcm_state_fops = {
3383         .open = simple_open,
3384         .read = dpcm_state_read_file,
3385         .llseek = default_llseek,
3386 };
3387
3388 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3389 {
3390         if (!rtd->dai_link)
3391                 return;
3392
3393         if (!rtd->card->debugfs_card_root)
3394                 return;
3395
3396         rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3397                         rtd->card->debugfs_card_root);
3398         if (!rtd->debugfs_dpcm_root) {
3399                 dev_dbg(rtd->dev,
3400                          "ASoC: Failed to create dpcm debugfs directory %s\n",
3401                          rtd->dai_link->name);
3402                 return;
3403         }
3404
3405         debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3406                             rtd, &dpcm_state_fops);
3407 }
3408 #endif