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