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mtd: lpddr: fix Kconfig dependency, for I/O accessors
[linux/fpc-iii.git] / sound / soc / soc-pcm.c
blob2cedf09f6d9613c7b34bb22888806fde598052c6
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_runtime_activate() - Increment active count for PCM runtime components
39 * @rtd: ASoC PCM runtime that is activated
40 * @stream: Direction of the PCM stream
41 *
42 * Increments the active count for all the DAIs and components attached to a PCM
43 * runtime. Should typically be called when a stream is opened.
44 *
45 * Must be called with the rtd->pcm_mutex being held
46 */
47 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
48 {
49 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
50 struct snd_soc_dai *codec_dai = rtd->codec_dai;
51
52 lockdep_assert_held(&rtd->pcm_mutex);
53
54 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
55 cpu_dai->playback_active++;
56 codec_dai->playback_active++;
57 } else {
58 cpu_dai->capture_active++;
59 codec_dai->capture_active++;
60 }
61
62 cpu_dai->active++;
63 codec_dai->active++;
64 cpu_dai->component->active++;
65 codec_dai->component->active++;
66 }
67
68 /**
69 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
70 * @rtd: ASoC PCM runtime that is deactivated
71 * @stream: Direction of the PCM stream
72 *
73 * Decrements the active count for all the DAIs and components attached to a PCM
74 * runtime. Should typically be called when a stream is closed.
75 *
76 * Must be called with the rtd->pcm_mutex being held
77 */
78 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
79 {
80 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
81 struct snd_soc_dai *codec_dai = rtd->codec_dai;
82
83 lockdep_assert_held(&rtd->pcm_mutex);
84
85 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
86 cpu_dai->playback_active--;
87 codec_dai->playback_active--;
88 } else {
89 cpu_dai->capture_active--;
90 codec_dai->capture_active--;
91 }
92
93 cpu_dai->active--;
94 codec_dai->active--;
95 cpu_dai->component->active--;
96 codec_dai->component->active--;
97 }
98
99 /**
100 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
101 * @rtd: The ASoC PCM runtime that should be checked.
102 *
103 * This function checks whether the power down delay should be ignored for a
104 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
105 * been configured to ignore the delay, or if none of the components benefits
106 * from having the delay.
107 */
108 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
109 {
110 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
111 return true;
112
113 return rtd->cpu_dai->component->ignore_pmdown_time &&
114 rtd->codec_dai->component->ignore_pmdown_time;
115 }
116
117 /**
118 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
119 * @substream: the pcm substream
120 * @hw: the hardware parameters
121 *
122 * Sets the substream runtime hardware parameters.
123 */
124 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
125 const struct snd_pcm_hardware *hw)
126 {
127 struct snd_pcm_runtime *runtime = substream->runtime;
128 runtime->hw.info = hw->info;
129 runtime->hw.formats = hw->formats;
130 runtime->hw.period_bytes_min = hw->period_bytes_min;
131 runtime->hw.period_bytes_max = hw->period_bytes_max;
132 runtime->hw.periods_min = hw->periods_min;
133 runtime->hw.periods_max = hw->periods_max;
134 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
135 runtime->hw.fifo_size = hw->fifo_size;
136 return 0;
137 }
138 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
139
140 /* DPCM stream event, send event to FE and all active BEs. */
141 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
142 int event)
143 {
144 struct snd_soc_dpcm *dpcm;
145
146 list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
147
148 struct snd_soc_pcm_runtime *be = dpcm->be;
149
150 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
151 be->dai_link->name, event, dir);
152
153 snd_soc_dapm_stream_event(be, dir, event);
154 }
155
156 snd_soc_dapm_stream_event(fe, dir, event);
157
158 return 0;
159 }
160
161 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
162 struct snd_soc_dai *soc_dai)
163 {
164 struct snd_soc_pcm_runtime *rtd = substream->private_data;
165 int ret;
166
167 if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
168 rtd->dai_link->symmetric_rates)) {
169 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
170 soc_dai->rate);
171
172 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
173 SNDRV_PCM_HW_PARAM_RATE,
174 soc_dai->rate, soc_dai->rate);
175 if (ret < 0) {
176 dev_err(soc_dai->dev,
177 "ASoC: Unable to apply rate constraint: %d\n",
178 ret);
179 return ret;
180 }
181 }
182
183 if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
184 rtd->dai_link->symmetric_channels)) {
185 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
186 soc_dai->channels);
187
188 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
189 SNDRV_PCM_HW_PARAM_CHANNELS,
190 soc_dai->channels,
191 soc_dai->channels);
192 if (ret < 0) {
193 dev_err(soc_dai->dev,
194 "ASoC: Unable to apply channel symmetry constraint: %d\n",
195 ret);
196 return ret;
197 }
198 }
199
200 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
201 rtd->dai_link->symmetric_samplebits)) {
202 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
203 soc_dai->sample_bits);
204
205 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
206 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
207 soc_dai->sample_bits,
208 soc_dai->sample_bits);
209 if (ret < 0) {
210 dev_err(soc_dai->dev,
211 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
212 ret);
213 return ret;
214 }
215 }
216
217 return 0;
218 }
219
220 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
221 struct snd_pcm_hw_params *params)
222 {
223 struct snd_soc_pcm_runtime *rtd = substream->private_data;
224 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
225 struct snd_soc_dai *codec_dai = rtd->codec_dai;
226 unsigned int rate, channels, sample_bits, symmetry;
227
228 rate = params_rate(params);
229 channels = params_channels(params);
230 sample_bits = snd_pcm_format_physical_width(params_format(params));
231
232 /* reject unmatched parameters when applying symmetry */
233 symmetry = cpu_dai->driver->symmetric_rates ||
234 codec_dai->driver->symmetric_rates ||
235 rtd->dai_link->symmetric_rates;
236 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
237 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
238 cpu_dai->rate, rate);
239 return -EINVAL;
240 }
241
242 symmetry = cpu_dai->driver->symmetric_channels ||
243 codec_dai->driver->symmetric_channels ||
244 rtd->dai_link->symmetric_channels;
245 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
246 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
247 cpu_dai->channels, channels);
248 return -EINVAL;
249 }
250
251 symmetry = cpu_dai->driver->symmetric_samplebits ||
252 codec_dai->driver->symmetric_samplebits ||
253 rtd->dai_link->symmetric_samplebits;
254 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
255 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
256 cpu_dai->sample_bits, sample_bits);
257 return -EINVAL;
258 }
259
260 return 0;
261 }
262
263 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
264 {
265 struct snd_soc_pcm_runtime *rtd = substream->private_data;
266 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
267 struct snd_soc_dai_driver *codec_driver = rtd->codec_dai->driver;
268 struct snd_soc_dai_link *link = rtd->dai_link;
269
270 return cpu_driver->symmetric_rates || codec_driver->symmetric_rates ||
271 link->symmetric_rates || cpu_driver->symmetric_channels ||
272 codec_driver->symmetric_channels || link->symmetric_channels ||
273 cpu_driver->symmetric_samplebits ||
274 codec_driver->symmetric_samplebits ||
275 link->symmetric_samplebits;
276 }
277
278 /*
279 * List of sample sizes that might go over the bus for parameter
280 * application. There ought to be a wildcard sample size for things
281 * like the DAC/ADC resolution to use but there isn't right now.
282 */
283 static int sample_sizes[] = {
284 24, 32,
285 };
286
287 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream,
288 struct snd_soc_dai *dai)
289 {
290 int ret, i, bits;
291
292 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
293 bits = dai->driver->playback.sig_bits;
294 else
295 bits = dai->driver->capture.sig_bits;
296
297 if (!bits)
298 return;
299
300 for (i = 0; i < ARRAY_SIZE(sample_sizes); i++) {
301 if (bits >= sample_sizes[i])
302 continue;
303
304 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0,
305 sample_sizes[i], bits);
306 if (ret != 0)
307 dev_warn(dai->dev,
308 "ASoC: Failed to set MSB %d/%d: %d\n",
309 bits, sample_sizes[i], ret);
310 }
311 }
312
313 static void soc_pcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
314 struct snd_soc_pcm_stream *codec_stream,
315 struct snd_soc_pcm_stream *cpu_stream)
316 {
317 struct snd_pcm_hardware *hw = &runtime->hw;
318
319 hw->channels_min = max(codec_stream->channels_min,
320 cpu_stream->channels_min);
321 hw->channels_max = min(codec_stream->channels_max,
322 cpu_stream->channels_max);
323 if (hw->formats)
324 hw->formats &= codec_stream->formats & cpu_stream->formats;
325 else
326 hw->formats = codec_stream->formats & cpu_stream->formats;
327 hw->rates = snd_pcm_rate_mask_intersect(codec_stream->rates,
328 cpu_stream->rates);
329
330 hw->rate_min = 0;
331 hw->rate_max = UINT_MAX;
332
333 snd_pcm_limit_hw_rates(runtime);
334
335 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
336 hw->rate_min = max(hw->rate_min, codec_stream->rate_min);
337 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
338 hw->rate_max = min_not_zero(hw->rate_max, codec_stream->rate_max);
339 }
340
341 /*
342 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
343 * then initialized and any private data can be allocated. This also calls
344 * startup for the cpu DAI, platform, machine and codec DAI.
345 */
346 static int soc_pcm_open(struct snd_pcm_substream *substream)
347 {
348 struct snd_soc_pcm_runtime *rtd = substream->private_data;
349 struct snd_pcm_runtime *runtime = substream->runtime;
350 struct snd_soc_platform *platform = rtd->platform;
351 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
352 struct snd_soc_dai *codec_dai = rtd->codec_dai;
353 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
354 struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
355 int ret = 0;
356
357 pinctrl_pm_select_default_state(cpu_dai->dev);
358 pinctrl_pm_select_default_state(codec_dai->dev);
359 pm_runtime_get_sync(cpu_dai->dev);
360 pm_runtime_get_sync(codec_dai->dev);
361 pm_runtime_get_sync(platform->dev);
362
363 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
364
365 /* startup the audio subsystem */
366 if (cpu_dai->driver->ops && cpu_dai->driver->ops->startup) {
367 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
368 if (ret < 0) {
369 dev_err(cpu_dai->dev, "ASoC: can't open interface"
370 " %s: %d\n", cpu_dai->name, ret);
371 goto out;
372 }
373 }
374
375 if (platform->driver->ops && platform->driver->ops->open) {
376 ret = platform->driver->ops->open(substream);
377 if (ret < 0) {
378 dev_err(platform->dev, "ASoC: can't open platform"
379 " %s: %d\n", platform->name, ret);
380 goto platform_err;
381 }
382 }
383
384 if (codec_dai->driver->ops && codec_dai->driver->ops->startup) {
385 ret = codec_dai->driver->ops->startup(substream, codec_dai);
386 if (ret < 0) {
387 dev_err(codec_dai->dev, "ASoC: can't open codec"
388 " %s: %d\n", codec_dai->name, ret);
389 goto codec_dai_err;
390 }
391 }
392
393 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
394 ret = rtd->dai_link->ops->startup(substream);
395 if (ret < 0) {
396 pr_err("ASoC: %s startup failed: %d\n",
397 rtd->dai_link->name, ret);
398 goto machine_err;
399 }
400 }
401
402 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
403 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
404 goto dynamic;
405
406 /* Check that the codec and cpu DAIs are compatible */
407 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
408 soc_pcm_init_runtime_hw(runtime, &codec_dai_drv->playback,
409 &cpu_dai_drv->playback);
410 } else {
411 soc_pcm_init_runtime_hw(runtime, &codec_dai_drv->capture,
412 &cpu_dai_drv->capture);
413 }
414
415 if (soc_pcm_has_symmetry(substream))
416 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
417
418 ret = -EINVAL;
419 if (!runtime->hw.rates) {
420 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
421 codec_dai->name, cpu_dai->name);
422 goto config_err;
423 }
424 if (!runtime->hw.formats) {
425 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
426 codec_dai->name, cpu_dai->name);
427 goto config_err;
428 }
429 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
430 runtime->hw.channels_min > runtime->hw.channels_max) {
431 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
432 codec_dai->name, cpu_dai->name);
433 goto config_err;
434 }
435
436 soc_pcm_apply_msb(substream, codec_dai);
437 soc_pcm_apply_msb(substream, cpu_dai);
438
439 /* Symmetry only applies if we've already got an active stream. */
440 if (cpu_dai->active) {
441 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
442 if (ret != 0)
443 goto config_err;
444 }
445
446 if (codec_dai->active) {
447 ret = soc_pcm_apply_symmetry(substream, codec_dai);
448 if (ret != 0)
449 goto config_err;
450 }
451
452 pr_debug("ASoC: %s <-> %s info:\n",
453 codec_dai->name, cpu_dai->name);
454 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
455 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
456 runtime->hw.channels_max);
457 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
458 runtime->hw.rate_max);
459
460 dynamic:
461
462 snd_soc_runtime_activate(rtd, substream->stream);
463
464 mutex_unlock(&rtd->pcm_mutex);
465 return 0;
466
467 config_err:
468 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
469 rtd->dai_link->ops->shutdown(substream);
470
471 machine_err:
472 if (codec_dai->driver->ops->shutdown)
473 codec_dai->driver->ops->shutdown(substream, codec_dai);
474
475 codec_dai_err:
476 if (platform->driver->ops && platform->driver->ops->close)
477 platform->driver->ops->close(substream);
478
479 platform_err:
480 if (cpu_dai->driver->ops->shutdown)
481 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
482 out:
483 mutex_unlock(&rtd->pcm_mutex);
484
485 pm_runtime_put(platform->dev);
486 pm_runtime_put(codec_dai->dev);
487 pm_runtime_put(cpu_dai->dev);
488 if (!codec_dai->active)
489 pinctrl_pm_select_sleep_state(codec_dai->dev);
490 if (!cpu_dai->active)
491 pinctrl_pm_select_sleep_state(cpu_dai->dev);
492
493 return ret;
494 }
495
496 /*
497 * Power down the audio subsystem pmdown_time msecs after close is called.
498 * This is to ensure there are no pops or clicks in between any music tracks
499 * due to DAPM power cycling.
500 */
501 static void close_delayed_work(struct work_struct *work)
502 {
503 struct snd_soc_pcm_runtime *rtd =
504 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
505 struct snd_soc_dai *codec_dai = rtd->codec_dai;
506
507 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
508
509 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
510 codec_dai->driver->playback.stream_name,
511 codec_dai->playback_active ? "active" : "inactive",
512 rtd->pop_wait ? "yes" : "no");
513
514 /* are we waiting on this codec DAI stream */
515 if (rtd->pop_wait == 1) {
516 rtd->pop_wait = 0;
517 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
518 SND_SOC_DAPM_STREAM_STOP);
519 }
520
521 mutex_unlock(&rtd->pcm_mutex);
522 }
523
524 /*
525 * Called by ALSA when a PCM substream is closed. Private data can be
526 * freed here. The cpu DAI, codec DAI, machine and platform are also
527 * shutdown.
528 */
529 static int soc_pcm_close(struct snd_pcm_substream *substream)
530 {
531 struct snd_soc_pcm_runtime *rtd = substream->private_data;
532 struct snd_soc_platform *platform = rtd->platform;
533 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
534 struct snd_soc_dai *codec_dai = rtd->codec_dai;
535
536 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
537
538 snd_soc_runtime_deactivate(rtd, substream->stream);
539
540 /* clear the corresponding DAIs rate when inactive */
541 if (!cpu_dai->active)
542 cpu_dai->rate = 0;
543
544 if (!codec_dai->active)
545 codec_dai->rate = 0;
546
547 if (cpu_dai->driver->ops->shutdown)
548 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
549
550 if (codec_dai->driver->ops->shutdown)
551 codec_dai->driver->ops->shutdown(substream, codec_dai);
552
553 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
554 rtd->dai_link->ops->shutdown(substream);
555
556 if (platform->driver->ops && platform->driver->ops->close)
557 platform->driver->ops->close(substream);
558 cpu_dai->runtime = NULL;
559
560 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
561 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
562 /* powered down playback stream now */
563 snd_soc_dapm_stream_event(rtd,
564 SNDRV_PCM_STREAM_PLAYBACK,
565 SND_SOC_DAPM_STREAM_STOP);
566 } else {
567 /* start delayed pop wq here for playback streams */
568 rtd->pop_wait = 1;
569 queue_delayed_work(system_power_efficient_wq,
570 &rtd->delayed_work,
571 msecs_to_jiffies(rtd->pmdown_time));
572 }
573 } else {
574 /* capture streams can be powered down now */
575 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
576 SND_SOC_DAPM_STREAM_STOP);
577 }
578
579 mutex_unlock(&rtd->pcm_mutex);
580
581 pm_runtime_put(platform->dev);
582 pm_runtime_put(codec_dai->dev);
583 pm_runtime_put(cpu_dai->dev);
584 if (!codec_dai->active)
585 pinctrl_pm_select_sleep_state(codec_dai->dev);
586 if (!cpu_dai->active)
587 pinctrl_pm_select_sleep_state(cpu_dai->dev);
588
589 return 0;
590 }
591
592 /*
593 * Called by ALSA when the PCM substream is prepared, can set format, sample
594 * rate, etc. This function is non atomic and can be called multiple times,
595 * it can refer to the runtime info.
596 */
597 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
598 {
599 struct snd_soc_pcm_runtime *rtd = substream->private_data;
600 struct snd_soc_platform *platform = rtd->platform;
601 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
602 struct snd_soc_dai *codec_dai = rtd->codec_dai;
603 int ret = 0;
604
605 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
606
607 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
608 ret = rtd->dai_link->ops->prepare(substream);
609 if (ret < 0) {
610 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
611 " %d\n", ret);
612 goto out;
613 }
614 }
615
616 if (platform->driver->ops && platform->driver->ops->prepare) {
617 ret = platform->driver->ops->prepare(substream);
618 if (ret < 0) {
619 dev_err(platform->dev, "ASoC: platform prepare error:"
620 " %d\n", ret);
621 goto out;
622 }
623 }
624
625 if (codec_dai->driver->ops && codec_dai->driver->ops->prepare) {
626 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
627 if (ret < 0) {
628 dev_err(codec_dai->dev, "ASoC: DAI prepare error: %d\n",
629 ret);
630 goto out;
631 }
632 }
633
634 if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) {
635 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
636 if (ret < 0) {
637 dev_err(cpu_dai->dev, "ASoC: DAI prepare error: %d\n",
638 ret);
639 goto out;
640 }
641 }
642
643 /* cancel any delayed stream shutdown that is pending */
644 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
645 rtd->pop_wait) {
646 rtd->pop_wait = 0;
647 cancel_delayed_work(&rtd->delayed_work);
648 }
649
650 snd_soc_dapm_stream_event(rtd, substream->stream,
651 SND_SOC_DAPM_STREAM_START);
652
653 snd_soc_dai_digital_mute(codec_dai, 0, substream->stream);
654
655 out:
656 mutex_unlock(&rtd->pcm_mutex);
657 return ret;
658 }
659
660 /*
661 * Called by ALSA when the hardware params are set by application. This
662 * function can also be called multiple times and can allocate buffers
663 * (using snd_pcm_lib_* ). It's non-atomic.
664 */
665 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
666 struct snd_pcm_hw_params *params)
667 {
668 struct snd_soc_pcm_runtime *rtd = substream->private_data;
669 struct snd_soc_platform *platform = rtd->platform;
670 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
671 struct snd_soc_dai *codec_dai = rtd->codec_dai;
672 int ret = 0;
673
674 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
675
676 ret = soc_pcm_params_symmetry(substream, params);
677 if (ret)
678 goto out;
679
680 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
681 ret = rtd->dai_link->ops->hw_params(substream, params);
682 if (ret < 0) {
683 dev_err(rtd->card->dev, "ASoC: machine hw_params"
684 " failed: %d\n", ret);
685 goto out;
686 }
687 }
688
689 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_params) {
690 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
691 if (ret < 0) {
692 dev_err(codec_dai->dev, "ASoC: can't set %s hw params:"
693 " %d\n", codec_dai->name, ret);
694 goto codec_err;
695 }
696 }
697
698 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_params) {
699 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
700 if (ret < 0) {
701 dev_err(cpu_dai->dev, "ASoC: %s hw params failed: %d\n",
702 cpu_dai->name, ret);
703 goto interface_err;
704 }
705 }
706
707 if (platform->driver->ops && platform->driver->ops->hw_params) {
708 ret = platform->driver->ops->hw_params(substream, params);
709 if (ret < 0) {
710 dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
711 platform->name, ret);
712 goto platform_err;
713 }
714 }
715
716 /* store the parameters for each DAIs */
717 cpu_dai->rate = params_rate(params);
718 cpu_dai->channels = params_channels(params);
719 cpu_dai->sample_bits =
720 snd_pcm_format_physical_width(params_format(params));
721
722 codec_dai->rate = params_rate(params);
723 codec_dai->channels = params_channels(params);
724 codec_dai->sample_bits =
725 snd_pcm_format_physical_width(params_format(params));
726
727 out:
728 mutex_unlock(&rtd->pcm_mutex);
729 return ret;
730
731 platform_err:
732 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
733 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
734
735 interface_err:
736 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
737 codec_dai->driver->ops->hw_free(substream, codec_dai);
738
739 codec_err:
740 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
741 rtd->dai_link->ops->hw_free(substream);
742
743 mutex_unlock(&rtd->pcm_mutex);
744 return ret;
745 }
746
747 /*
748 * Frees resources allocated by hw_params, can be called multiple times
749 */
750 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
751 {
752 struct snd_soc_pcm_runtime *rtd = substream->private_data;
753 struct snd_soc_platform *platform = rtd->platform;
754 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
755 struct snd_soc_dai *codec_dai = rtd->codec_dai;
756 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
757
758 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
759
760 /* clear the corresponding DAIs parameters when going to be inactive */
761 if (cpu_dai->active == 1) {
762 cpu_dai->rate = 0;
763 cpu_dai->channels = 0;
764 cpu_dai->sample_bits = 0;
765 }
766
767 if (codec_dai->active == 1) {
768 codec_dai->rate = 0;
769 codec_dai->channels = 0;
770 codec_dai->sample_bits = 0;
771 }
772
773 /* apply codec digital mute */
774 if ((playback && codec_dai->playback_active == 1) ||
775 (!playback && codec_dai->capture_active == 1))
776 snd_soc_dai_digital_mute(codec_dai, 1, substream->stream);
777
778 /* free any machine hw params */
779 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
780 rtd->dai_link->ops->hw_free(substream);
781
782 /* free any DMA resources */
783 if (platform->driver->ops && platform->driver->ops->hw_free)
784 platform->driver->ops->hw_free(substream);
785
786 /* now free hw params for the DAIs */
787 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
788 codec_dai->driver->ops->hw_free(substream, codec_dai);
789
790 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
791 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
792
793 mutex_unlock(&rtd->pcm_mutex);
794 return 0;
795 }
796
797 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
798 {
799 struct snd_soc_pcm_runtime *rtd = substream->private_data;
800 struct snd_soc_platform *platform = rtd->platform;
801 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
802 struct snd_soc_dai *codec_dai = rtd->codec_dai;
803 int ret;
804
805 if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) {
806 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
807 if (ret < 0)
808 return ret;
809 }
810
811 if (platform->driver->ops && platform->driver->ops->trigger) {
812 ret = platform->driver->ops->trigger(substream, cmd);
813 if (ret < 0)
814 return ret;
815 }
816
817 if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) {
818 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
819 if (ret < 0)
820 return ret;
821 }
822 return 0;
823 }
824
825 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
826 int cmd)
827 {
828 struct snd_soc_pcm_runtime *rtd = substream->private_data;
829 struct snd_soc_platform *platform = rtd->platform;
830 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
831 struct snd_soc_dai *codec_dai = rtd->codec_dai;
832 int ret;
833
834 if (codec_dai->driver->ops &&
835 codec_dai->driver->ops->bespoke_trigger) {
836 ret = codec_dai->driver->ops->bespoke_trigger(substream, cmd, codec_dai);
837 if (ret < 0)
838 return ret;
839 }
840
841 if (platform->driver->bespoke_trigger) {
842 ret = platform->driver->bespoke_trigger(substream, cmd);
843 if (ret < 0)
844 return ret;
845 }
846
847 if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) {
848 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
849 if (ret < 0)
850 return ret;
851 }
852 return 0;
853 }
854 /*
855 * soc level wrapper for pointer callback
856 * If cpu_dai, codec_dai, platform driver has the delay callback, than
857 * the runtime->delay will be updated accordingly.
858 */
859 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
860 {
861 struct snd_soc_pcm_runtime *rtd = substream->private_data;
862 struct snd_soc_platform *platform = rtd->platform;
863 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
864 struct snd_soc_dai *codec_dai = rtd->codec_dai;
865 struct snd_pcm_runtime *runtime = substream->runtime;
866 snd_pcm_uframes_t offset = 0;
867 snd_pcm_sframes_t delay = 0;
868
869 if (platform->driver->ops && platform->driver->ops->pointer)
870 offset = platform->driver->ops->pointer(substream);
871
872 if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay)
873 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
874
875 if (codec_dai->driver->ops && codec_dai->driver->ops->delay)
876 delay += codec_dai->driver->ops->delay(substream, codec_dai);
877
878 if (platform->driver->delay)
879 delay += platform->driver->delay(substream, codec_dai);
880
881 runtime->delay = delay;
882
883 return offset;
884 }
885
886 /* connect a FE and BE */
887 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
888 struct snd_soc_pcm_runtime *be, int stream)
889 {
890 struct snd_soc_dpcm *dpcm;
891
892 /* only add new dpcms */
893 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
894 if (dpcm->be == be && dpcm->fe == fe)
895 return 0;
896 }
897
898 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
899 if (!dpcm)
900 return -ENOMEM;
901
902 dpcm->be = be;
903 dpcm->fe = fe;
904 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
905 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
906 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
907 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
908
909 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
910 stream ? "capture" : "playback", fe->dai_link->name,
911 stream ? "<-" : "->", be->dai_link->name);
912
913 #ifdef CONFIG_DEBUG_FS
914 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
915 fe->debugfs_dpcm_root, &dpcm->state);
916 #endif
917 return 1;
918 }
919
920 /* reparent a BE onto another FE */
921 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
922 struct snd_soc_pcm_runtime *be, int stream)
923 {
924 struct snd_soc_dpcm *dpcm;
925 struct snd_pcm_substream *fe_substream, *be_substream;
926
927 /* reparent if BE is connected to other FEs */
928 if (!be->dpcm[stream].users)
929 return;
930
931 be_substream = snd_soc_dpcm_get_substream(be, stream);
932
933 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
934 if (dpcm->fe == fe)
935 continue;
936
937 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
938 stream ? "capture" : "playback",
939 dpcm->fe->dai_link->name,
940 stream ? "<-" : "->", dpcm->be->dai_link->name);
941
942 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
943 be_substream->runtime = fe_substream->runtime;
944 break;
945 }
946 }
947
948 /* disconnect a BE and FE */
949 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
950 {
951 struct snd_soc_dpcm *dpcm, *d;
952
953 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
954 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
955 stream ? "capture" : "playback",
956 dpcm->be->dai_link->name);
957
958 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
959 continue;
960
961 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
962 stream ? "capture" : "playback", fe->dai_link->name,
963 stream ? "<-" : "->", dpcm->be->dai_link->name);
964
965 /* BEs still alive need new FE */
966 dpcm_be_reparent(fe, dpcm->be, stream);
967
968 #ifdef CONFIG_DEBUG_FS
969 debugfs_remove(dpcm->debugfs_state);
970 #endif
971 list_del(&dpcm->list_be);
972 list_del(&dpcm->list_fe);
973 kfree(dpcm);
974 }
975 }
976
977 /* get BE for DAI widget and stream */
978 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
979 struct snd_soc_dapm_widget *widget, int stream)
980 {
981 struct snd_soc_pcm_runtime *be;
982 int i;
983
984 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
985 for (i = 0; i < card->num_links; i++) {
986 be = &card->rtd[i];
987
988 if (!be->dai_link->no_pcm)
989 continue;
990
991 if (be->cpu_dai->playback_widget == widget ||
992 be->codec_dai->playback_widget == widget)
993 return be;
994 }
995 } else {
996
997 for (i = 0; i < card->num_links; i++) {
998 be = &card->rtd[i];
999
1000 if (!be->dai_link->no_pcm)
1001 continue;
1002
1003 if (be->cpu_dai->capture_widget == widget ||
1004 be->codec_dai->capture_widget == widget)
1005 return be;
1006 }
1007 }
1008
1009 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1010 stream ? "capture" : "playback", widget->name);
1011 return NULL;
1012 }
1013
1014 static inline struct snd_soc_dapm_widget *
1015 rtd_get_cpu_widget(struct snd_soc_pcm_runtime *rtd, int stream)
1016 {
1017 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1018 return rtd->cpu_dai->playback_widget;
1019 else
1020 return rtd->cpu_dai->capture_widget;
1021 }
1022
1023 static inline struct snd_soc_dapm_widget *
1024 rtd_get_codec_widget(struct snd_soc_pcm_runtime *rtd, int stream)
1025 {
1026 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1027 return rtd->codec_dai->playback_widget;
1028 else
1029 return rtd->codec_dai->capture_widget;
1030 }
1031
1032 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1033 struct snd_soc_dapm_widget *widget)
1034 {
1035 int i;
1036
1037 for (i = 0; i < list->num_widgets; i++) {
1038 if (widget == list->widgets[i])
1039 return 1;
1040 }
1041
1042 return 0;
1043 }
1044
1045 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1046 int stream, struct snd_soc_dapm_widget_list **list_)
1047 {
1048 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1049 struct snd_soc_dapm_widget_list *list;
1050 int paths;
1051
1052 list = kzalloc(sizeof(struct snd_soc_dapm_widget_list) +
1053 sizeof(struct snd_soc_dapm_widget *), GFP_KERNEL);
1054 if (list == NULL)
1055 return -ENOMEM;
1056
1057 /* get number of valid DAI paths and their widgets */
1058 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, &list);
1059
1060 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1061 stream ? "capture" : "playback");
1062
1063 *list_ = list;
1064 return paths;
1065 }
1066
1067 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1068 struct snd_soc_dapm_widget_list **list_)
1069 {
1070 struct snd_soc_dpcm *dpcm;
1071 struct snd_soc_dapm_widget_list *list = *list_;
1072 struct snd_soc_dapm_widget *widget;
1073 int prune = 0;
1074
1075 /* Destroy any old FE <--> BE connections */
1076 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1077
1078 /* is there a valid CPU DAI widget for this BE */
1079 widget = rtd_get_cpu_widget(dpcm->be, stream);
1080
1081 /* prune the BE if it's no longer in our active list */
1082 if (widget && widget_in_list(list, widget))
1083 continue;
1084
1085 /* is there a valid CODEC DAI widget for this BE */
1086 widget = rtd_get_codec_widget(dpcm->be, stream);
1087
1088 /* prune the BE if it's no longer in our active list */
1089 if (widget && widget_in_list(list, widget))
1090 continue;
1091
1092 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1093 stream ? "capture" : "playback",
1094 dpcm->be->dai_link->name, fe->dai_link->name);
1095 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1096 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1097 prune++;
1098 }
1099
1100 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1101 return prune;
1102 }
1103
1104 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1105 struct snd_soc_dapm_widget_list **list_)
1106 {
1107 struct snd_soc_card *card = fe->card;
1108 struct snd_soc_dapm_widget_list *list = *list_;
1109 struct snd_soc_pcm_runtime *be;
1110 int i, new = 0, err;
1111
1112 /* Create any new FE <--> BE connections */
1113 for (i = 0; i < list->num_widgets; i++) {
1114
1115 switch (list->widgets[i]->id) {
1116 case snd_soc_dapm_dai_in:
1117 case snd_soc_dapm_dai_out:
1118 break;
1119 default:
1120 continue;
1121 }
1122
1123 /* is there a valid BE rtd for this widget */
1124 be = dpcm_get_be(card, list->widgets[i], stream);
1125 if (!be) {
1126 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1127 list->widgets[i]->name);
1128 continue;
1129 }
1130
1131 /* make sure BE is a real BE */
1132 if (!be->dai_link->no_pcm)
1133 continue;
1134
1135 /* don't connect if FE is not running */
1136 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1137 continue;
1138
1139 /* newly connected FE and BE */
1140 err = dpcm_be_connect(fe, be, stream);
1141 if (err < 0) {
1142 dev_err(fe->dev, "ASoC: can't connect %s\n",
1143 list->widgets[i]->name);
1144 break;
1145 } else if (err == 0) /* already connected */
1146 continue;
1147
1148 /* new */
1149 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1150 new++;
1151 }
1152
1153 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1154 return new;
1155 }
1156
1157 /*
1158 * Find the corresponding BE DAIs that source or sink audio to this
1159 * FE substream.
1160 */
1161 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1162 int stream, struct snd_soc_dapm_widget_list **list, int new)
1163 {
1164 if (new)
1165 return dpcm_add_paths(fe, stream, list);
1166 else
1167 return dpcm_prune_paths(fe, stream, list);
1168 }
1169
1170 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1171 {
1172 struct snd_soc_dpcm *dpcm;
1173
1174 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1175 dpcm->be->dpcm[stream].runtime_update =
1176 SND_SOC_DPCM_UPDATE_NO;
1177 }
1178
1179 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1180 int stream)
1181 {
1182 struct snd_soc_dpcm *dpcm;
1183
1184 /* disable any enabled and non active backends */
1185 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1186
1187 struct snd_soc_pcm_runtime *be = dpcm->be;
1188 struct snd_pcm_substream *be_substream =
1189 snd_soc_dpcm_get_substream(be, stream);
1190
1191 if (be->dpcm[stream].users == 0)
1192 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1193 stream ? "capture" : "playback",
1194 be->dpcm[stream].state);
1195
1196 if (--be->dpcm[stream].users != 0)
1197 continue;
1198
1199 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1200 continue;
1201
1202 soc_pcm_close(be_substream);
1203 be_substream->runtime = NULL;
1204 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1205 }
1206 }
1207
1208 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1209 {
1210 struct snd_soc_dpcm *dpcm;
1211 int err, count = 0;
1212
1213 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1214 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1215
1216 struct snd_soc_pcm_runtime *be = dpcm->be;
1217 struct snd_pcm_substream *be_substream =
1218 snd_soc_dpcm_get_substream(be, stream);
1219
1220 if (!be_substream) {
1221 dev_err(be->dev, "ASoC: no backend %s stream\n",
1222 stream ? "capture" : "playback");
1223 continue;
1224 }
1225
1226 /* is this op for this BE ? */
1227 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1228 continue;
1229
1230 /* first time the dpcm is open ? */
1231 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1232 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1233 stream ? "capture" : "playback",
1234 be->dpcm[stream].state);
1235
1236 if (be->dpcm[stream].users++ != 0)
1237 continue;
1238
1239 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1240 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1241 continue;
1242
1243 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1244 stream ? "capture" : "playback", be->dai_link->name);
1245
1246 be_substream->runtime = be->dpcm[stream].runtime;
1247 err = soc_pcm_open(be_substream);
1248 if (err < 0) {
1249 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1250 be->dpcm[stream].users--;
1251 if (be->dpcm[stream].users < 0)
1252 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1253 stream ? "capture" : "playback",
1254 be->dpcm[stream].state);
1255
1256 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1257 goto unwind;
1258 }
1259
1260 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1261 count++;
1262 }
1263
1264 return count;
1265
1266 unwind:
1267 /* disable any enabled and non active backends */
1268 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1269 struct snd_soc_pcm_runtime *be = dpcm->be;
1270 struct snd_pcm_substream *be_substream =
1271 snd_soc_dpcm_get_substream(be, stream);
1272
1273 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1274 continue;
1275
1276 if (be->dpcm[stream].users == 0)
1277 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1278 stream ? "capture" : "playback",
1279 be->dpcm[stream].state);
1280
1281 if (--be->dpcm[stream].users != 0)
1282 continue;
1283
1284 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1285 continue;
1286
1287 soc_pcm_close(be_substream);
1288 be_substream->runtime = NULL;
1289 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1290 }
1291
1292 return err;
1293 }
1294
1295 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1296 struct snd_soc_pcm_stream *stream)
1297 {
1298 runtime->hw.rate_min = stream->rate_min;
1299 runtime->hw.rate_max = stream->rate_max;
1300 runtime->hw.channels_min = stream->channels_min;
1301 runtime->hw.channels_max = stream->channels_max;
1302 if (runtime->hw.formats)
1303 runtime->hw.formats &= stream->formats;
1304 else
1305 runtime->hw.formats = stream->formats;
1306 runtime->hw.rates = stream->rates;
1307 }
1308
1309 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1310 {
1311 struct snd_pcm_runtime *runtime = substream->runtime;
1312 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1313 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1314 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1315
1316 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1317 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1318 else
1319 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1320 }
1321
1322 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1323 {
1324 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1325 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1326 int stream = fe_substream->stream, ret = 0;
1327
1328 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1329
1330 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1331 if (ret < 0) {
1332 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1333 goto be_err;
1334 }
1335
1336 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1337
1338 /* start the DAI frontend */
1339 ret = soc_pcm_open(fe_substream);
1340 if (ret < 0) {
1341 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1342 goto unwind;
1343 }
1344
1345 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1346
1347 dpcm_set_fe_runtime(fe_substream);
1348 snd_pcm_limit_hw_rates(runtime);
1349
1350 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1351 return 0;
1352
1353 unwind:
1354 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1355 be_err:
1356 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1357 return ret;
1358 }
1359
1360 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1361 {
1362 struct snd_soc_dpcm *dpcm;
1363
1364 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1365 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1366
1367 struct snd_soc_pcm_runtime *be = dpcm->be;
1368 struct snd_pcm_substream *be_substream =
1369 snd_soc_dpcm_get_substream(be, stream);
1370
1371 /* is this op for this BE ? */
1372 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1373 continue;
1374
1375 if (be->dpcm[stream].users == 0)
1376 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1377 stream ? "capture" : "playback",
1378 be->dpcm[stream].state);
1379
1380 if (--be->dpcm[stream].users != 0)
1381 continue;
1382
1383 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1384 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1385 continue;
1386
1387 dev_dbg(be->dev, "ASoC: close BE %s\n",
1388 dpcm->fe->dai_link->name);
1389
1390 soc_pcm_close(be_substream);
1391 be_substream->runtime = NULL;
1392
1393 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1394 }
1395 return 0;
1396 }
1397
1398 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1399 {
1400 struct snd_soc_pcm_runtime *fe = substream->private_data;
1401 int stream = substream->stream;
1402
1403 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1404
1405 /* shutdown the BEs */
1406 dpcm_be_dai_shutdown(fe, substream->stream);
1407
1408 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1409
1410 /* now shutdown the frontend */
1411 soc_pcm_close(substream);
1412
1413 /* run the stream event for each BE */
1414 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1415
1416 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1417 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1418 return 0;
1419 }
1420
1421 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1422 {
1423 struct snd_soc_dpcm *dpcm;
1424
1425 /* only hw_params backends that are either sinks or sources
1426 * to this frontend DAI */
1427 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1428
1429 struct snd_soc_pcm_runtime *be = dpcm->be;
1430 struct snd_pcm_substream *be_substream =
1431 snd_soc_dpcm_get_substream(be, stream);
1432
1433 /* is this op for this BE ? */
1434 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1435 continue;
1436
1437 /* only free hw when no longer used - check all FEs */
1438 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1439 continue;
1440
1441 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1442 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1443 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1444 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1445 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1446 continue;
1447
1448 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1449 dpcm->fe->dai_link->name);
1450
1451 soc_pcm_hw_free(be_substream);
1452
1453 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1454 }
1455
1456 return 0;
1457 }
1458
1459 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1460 {
1461 struct snd_soc_pcm_runtime *fe = substream->private_data;
1462 int err, stream = substream->stream;
1463
1464 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1465 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1466
1467 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1468
1469 /* call hw_free on the frontend */
1470 err = soc_pcm_hw_free(substream);
1471 if (err < 0)
1472 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
1473 fe->dai_link->name);
1474
1475 /* only hw_params backends that are either sinks or sources
1476 * to this frontend DAI */
1477 err = dpcm_be_dai_hw_free(fe, stream);
1478
1479 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1480 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1481
1482 mutex_unlock(&fe->card->mutex);
1483 return 0;
1484 }
1485
1486 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1487 {
1488 struct snd_soc_dpcm *dpcm;
1489 int ret;
1490
1491 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1492
1493 struct snd_soc_pcm_runtime *be = dpcm->be;
1494 struct snd_pcm_substream *be_substream =
1495 snd_soc_dpcm_get_substream(be, stream);
1496
1497 /* is this op for this BE ? */
1498 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1499 continue;
1500
1501 /* only allow hw_params() if no connected FEs are running */
1502 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1503 continue;
1504
1505 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1506 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1507 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1508 continue;
1509
1510 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1511 dpcm->fe->dai_link->name);
1512
1513 /* copy params for each dpcm */
1514 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1515 sizeof(struct snd_pcm_hw_params));
1516
1517 /* perform any hw_params fixups */
1518 if (be->dai_link->be_hw_params_fixup) {
1519 ret = be->dai_link->be_hw_params_fixup(be,
1520 &dpcm->hw_params);
1521 if (ret < 0) {
1522 dev_err(be->dev,
1523 "ASoC: hw_params BE fixup failed %d\n",
1524 ret);
1525 goto unwind;
1526 }
1527 }
1528
1529 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1530 if (ret < 0) {
1531 dev_err(dpcm->be->dev,
1532 "ASoC: hw_params BE failed %d\n", ret);
1533 goto unwind;
1534 }
1535
1536 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1537 }
1538 return 0;
1539
1540 unwind:
1541 /* disable any enabled and non active backends */
1542 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1543 struct snd_soc_pcm_runtime *be = dpcm->be;
1544 struct snd_pcm_substream *be_substream =
1545 snd_soc_dpcm_get_substream(be, stream);
1546
1547 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1548 continue;
1549
1550 /* only allow hw_free() if no connected FEs are running */
1551 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1552 continue;
1553
1554 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1555 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1556 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1557 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1558 continue;
1559
1560 soc_pcm_hw_free(be_substream);
1561 }
1562
1563 return ret;
1564 }
1565
1566 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1567 struct snd_pcm_hw_params *params)
1568 {
1569 struct snd_soc_pcm_runtime *fe = substream->private_data;
1570 int ret, stream = substream->stream;
1571
1572 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1573 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1574
1575 memcpy(&fe->dpcm[substream->stream].hw_params, params,
1576 sizeof(struct snd_pcm_hw_params));
1577 ret = dpcm_be_dai_hw_params(fe, substream->stream);
1578 if (ret < 0) {
1579 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
1580 goto out;
1581 }
1582
1583 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1584 fe->dai_link->name, params_rate(params),
1585 params_channels(params), params_format(params));
1586
1587 /* call hw_params on the frontend */
1588 ret = soc_pcm_hw_params(substream, params);
1589 if (ret < 0) {
1590 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
1591 dpcm_be_dai_hw_free(fe, stream);
1592 } else
1593 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1594
1595 out:
1596 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1597 mutex_unlock(&fe->card->mutex);
1598 return ret;
1599 }
1600
1601 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
1602 struct snd_pcm_substream *substream, int cmd)
1603 {
1604 int ret;
1605
1606 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
1607 dpcm->fe->dai_link->name, cmd);
1608
1609 ret = soc_pcm_trigger(substream, cmd);
1610 if (ret < 0)
1611 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
1612
1613 return ret;
1614 }
1615
1616 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
1617 int cmd)
1618 {
1619 struct snd_soc_dpcm *dpcm;
1620 int ret = 0;
1621
1622 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1623
1624 struct snd_soc_pcm_runtime *be = dpcm->be;
1625 struct snd_pcm_substream *be_substream =
1626 snd_soc_dpcm_get_substream(be, stream);
1627
1628 /* is this op for this BE ? */
1629 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1630 continue;
1631
1632 switch (cmd) {
1633 case SNDRV_PCM_TRIGGER_START:
1634 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1635 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1636 continue;
1637
1638 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1639 if (ret)
1640 return ret;
1641
1642 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1643 break;
1644 case SNDRV_PCM_TRIGGER_RESUME:
1645 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1646 continue;
1647
1648 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1649 if (ret)
1650 return ret;
1651
1652 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1653 break;
1654 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1655 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
1656 continue;
1657
1658 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1659 if (ret)
1660 return ret;
1661
1662 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1663 break;
1664 case SNDRV_PCM_TRIGGER_STOP:
1665 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1666 continue;
1667
1668 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1669 continue;
1670
1671 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1672 if (ret)
1673 return ret;
1674
1675 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1676 break;
1677 case SNDRV_PCM_TRIGGER_SUSPEND:
1678 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)
1679 continue;
1680
1681 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1682 continue;
1683
1684 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1685 if (ret)
1686 return ret;
1687
1688 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
1689 break;
1690 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1691 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1692 continue;
1693
1694 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1695 continue;
1696
1697 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1698 if (ret)
1699 return ret;
1700
1701 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
1702 break;
1703 }
1704 }
1705
1706 return ret;
1707 }
1708 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
1709
1710 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
1711 {
1712 struct snd_soc_pcm_runtime *fe = substream->private_data;
1713 int stream = substream->stream, ret;
1714 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1715
1716 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1717
1718 switch (trigger) {
1719 case SND_SOC_DPCM_TRIGGER_PRE:
1720 /* call trigger on the frontend before the backend. */
1721
1722 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
1723 fe->dai_link->name, cmd);
1724
1725 ret = soc_pcm_trigger(substream, cmd);
1726 if (ret < 0) {
1727 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1728 goto out;
1729 }
1730
1731 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1732 break;
1733 case SND_SOC_DPCM_TRIGGER_POST:
1734 /* call trigger on the frontend after the backend. */
1735
1736 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1737 if (ret < 0) {
1738 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1739 goto out;
1740 }
1741
1742 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
1743 fe->dai_link->name, cmd);
1744
1745 ret = soc_pcm_trigger(substream, cmd);
1746 break;
1747 case SND_SOC_DPCM_TRIGGER_BESPOKE:
1748 /* bespoke trigger() - handles both FE and BEs */
1749
1750 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
1751 fe->dai_link->name, cmd);
1752
1753 ret = soc_pcm_bespoke_trigger(substream, cmd);
1754 if (ret < 0) {
1755 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1756 goto out;
1757 }
1758 break;
1759 default:
1760 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
1761 fe->dai_link->name);
1762 ret = -EINVAL;
1763 goto out;
1764 }
1765
1766 switch (cmd) {
1767 case SNDRV_PCM_TRIGGER_START:
1768 case SNDRV_PCM_TRIGGER_RESUME:
1769 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1770 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1771 break;
1772 case SNDRV_PCM_TRIGGER_STOP:
1773 case SNDRV_PCM_TRIGGER_SUSPEND:
1774 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1775 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1776 break;
1777 }
1778
1779 out:
1780 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1781 return ret;
1782 }
1783
1784 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
1785 {
1786 struct snd_soc_dpcm *dpcm;
1787 int ret = 0;
1788
1789 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1790
1791 struct snd_soc_pcm_runtime *be = dpcm->be;
1792 struct snd_pcm_substream *be_substream =
1793 snd_soc_dpcm_get_substream(be, stream);
1794
1795 /* is this op for this BE ? */
1796 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1797 continue;
1798
1799 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1800 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1801 continue;
1802
1803 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
1804 dpcm->fe->dai_link->name);
1805
1806 ret = soc_pcm_prepare(be_substream);
1807 if (ret < 0) {
1808 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
1809 ret);
1810 break;
1811 }
1812
1813 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
1814 }
1815 return ret;
1816 }
1817
1818 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
1819 {
1820 struct snd_soc_pcm_runtime *fe = substream->private_data;
1821 int stream = substream->stream, ret = 0;
1822
1823 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1824
1825 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
1826
1827 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1828
1829 /* there is no point preparing this FE if there are no BEs */
1830 if (list_empty(&fe->dpcm[stream].be_clients)) {
1831 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
1832 fe->dai_link->name);
1833 ret = -EINVAL;
1834 goto out;
1835 }
1836
1837 ret = dpcm_be_dai_prepare(fe, substream->stream);
1838 if (ret < 0)
1839 goto out;
1840
1841 /* call prepare on the frontend */
1842 ret = soc_pcm_prepare(substream);
1843 if (ret < 0) {
1844 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
1845 fe->dai_link->name);
1846 goto out;
1847 }
1848
1849 /* run the stream event for each BE */
1850 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
1851 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
1852
1853 out:
1854 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1855 mutex_unlock(&fe->card->mutex);
1856
1857 return ret;
1858 }
1859
1860 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
1861 unsigned int cmd, void *arg)
1862 {
1863 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1864 struct snd_soc_platform *platform = rtd->platform;
1865
1866 if (platform->driver->ops && platform->driver->ops->ioctl)
1867 return platform->driver->ops->ioctl(substream, cmd, arg);
1868 return snd_pcm_lib_ioctl(substream, cmd, arg);
1869 }
1870
1871 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1872 {
1873 struct snd_pcm_substream *substream =
1874 snd_soc_dpcm_get_substream(fe, stream);
1875 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1876 int err;
1877
1878 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
1879 stream ? "capture" : "playback", fe->dai_link->name);
1880
1881 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
1882 /* call bespoke trigger - FE takes care of all BE triggers */
1883 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
1884 fe->dai_link->name);
1885
1886 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1887 if (err < 0)
1888 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
1889 } else {
1890 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
1891 fe->dai_link->name);
1892
1893 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
1894 if (err < 0)
1895 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
1896 }
1897
1898 err = dpcm_be_dai_hw_free(fe, stream);
1899 if (err < 0)
1900 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
1901
1902 err = dpcm_be_dai_shutdown(fe, stream);
1903 if (err < 0)
1904 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
1905
1906 /* run the stream event for each BE */
1907 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
1908
1909 return 0;
1910 }
1911
1912 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
1913 {
1914 struct snd_pcm_substream *substream =
1915 snd_soc_dpcm_get_substream(fe, stream);
1916 struct snd_soc_dpcm *dpcm;
1917 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1918 int ret;
1919
1920 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
1921 stream ? "capture" : "playback", fe->dai_link->name);
1922
1923 /* Only start the BE if the FE is ready */
1924 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
1925 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
1926 return -EINVAL;
1927
1928 /* startup must always be called for new BEs */
1929 ret = dpcm_be_dai_startup(fe, stream);
1930 if (ret < 0)
1931 goto disconnect;
1932
1933 /* keep going if FE state is > open */
1934 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
1935 return 0;
1936
1937 ret = dpcm_be_dai_hw_params(fe, stream);
1938 if (ret < 0)
1939 goto close;
1940
1941 /* keep going if FE state is > hw_params */
1942 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
1943 return 0;
1944
1945
1946 ret = dpcm_be_dai_prepare(fe, stream);
1947 if (ret < 0)
1948 goto hw_free;
1949
1950 /* run the stream event for each BE */
1951 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
1952
1953 /* keep going if FE state is > prepare */
1954 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
1955 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
1956 return 0;
1957
1958 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
1959 /* call trigger on the frontend - FE takes care of all BE triggers */
1960 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
1961 fe->dai_link->name);
1962
1963 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
1964 if (ret < 0) {
1965 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
1966 goto hw_free;
1967 }
1968 } else {
1969 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
1970 fe->dai_link->name);
1971
1972 ret = dpcm_be_dai_trigger(fe, stream,
1973 SNDRV_PCM_TRIGGER_START);
1974 if (ret < 0) {
1975 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1976 goto hw_free;
1977 }
1978 }
1979
1980 return 0;
1981
1982 hw_free:
1983 dpcm_be_dai_hw_free(fe, stream);
1984 close:
1985 dpcm_be_dai_shutdown(fe, stream);
1986 disconnect:
1987 /* disconnect any non started BEs */
1988 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1989 struct snd_soc_pcm_runtime *be = dpcm->be;
1990 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1991 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1992 }
1993
1994 return ret;
1995 }
1996
1997 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
1998 {
1999 int ret;
2000
2001 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
2002 ret = dpcm_run_update_startup(fe, stream);
2003 if (ret < 0)
2004 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2005 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2006
2007 return ret;
2008 }
2009
2010 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2011 {
2012 int ret;
2013
2014 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
2015 ret = dpcm_run_update_shutdown(fe, stream);
2016 if (ret < 0)
2017 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2018 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2019
2020 return ret;
2021 }
2022
2023 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2024 * any DAI links.
2025 */
2026 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2027 {
2028 int i, old, new, paths;
2029
2030 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2031 for (i = 0; i < card->num_rtd; i++) {
2032 struct snd_soc_dapm_widget_list *list;
2033 struct snd_soc_pcm_runtime *fe = &card->rtd[i];
2034
2035 /* make sure link is FE */
2036 if (!fe->dai_link->dynamic)
2037 continue;
2038
2039 /* only check active links */
2040 if (!fe->cpu_dai->active)
2041 continue;
2042
2043 /* DAPM sync will call this to update DSP paths */
2044 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
2045 fe->dai_link->name);
2046
2047 /* skip if FE doesn't have playback capability */
2048 if (!fe->cpu_dai->driver->playback.channels_min)
2049 goto capture;
2050
2051 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2052 if (paths < 0) {
2053 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2054 fe->dai_link->name, "playback");
2055 mutex_unlock(&card->mutex);
2056 return paths;
2057 }
2058
2059 /* update any new playback paths */
2060 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
2061 if (new) {
2062 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2063 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2064 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2065 }
2066
2067 /* update any old playback paths */
2068 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
2069 if (old) {
2070 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2071 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2072 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2073 }
2074
2075 capture:
2076 /* skip if FE doesn't have capture capability */
2077 if (!fe->cpu_dai->driver->capture.channels_min)
2078 continue;
2079
2080 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2081 if (paths < 0) {
2082 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2083 fe->dai_link->name, "capture");
2084 mutex_unlock(&card->mutex);
2085 return paths;
2086 }
2087
2088 /* update any new capture paths */
2089 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
2090 if (new) {
2091 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2092 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2093 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2094 }
2095
2096 /* update any old capture paths */
2097 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
2098 if (old) {
2099 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2100 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2101 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2102 }
2103
2104 dpcm_path_put(&list);
2105 }
2106
2107 mutex_unlock(&card->mutex);
2108 return 0;
2109 }
2110 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2111 {
2112 struct snd_soc_dpcm *dpcm;
2113 struct list_head *clients =
2114 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
2115
2116 list_for_each_entry(dpcm, clients, list_be) {
2117
2118 struct snd_soc_pcm_runtime *be = dpcm->be;
2119 struct snd_soc_dai *dai = be->codec_dai;
2120 struct snd_soc_dai_driver *drv = dai->driver;
2121
2122 if (be->dai_link->ignore_suspend)
2123 continue;
2124
2125 dev_dbg(be->dev, "ASoC: BE digital mute %s\n", be->dai_link->name);
2126
2127 if (drv->ops && drv->ops->digital_mute && dai->playback_active)
2128 drv->ops->digital_mute(dai, mute);
2129 }
2130
2131 return 0;
2132 }
2133
2134 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2135 {
2136 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2137 struct snd_soc_dpcm *dpcm;
2138 struct snd_soc_dapm_widget_list *list;
2139 int ret;
2140 int stream = fe_substream->stream;
2141
2142 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2143 fe->dpcm[stream].runtime = fe_substream->runtime;
2144
2145 if (dpcm_path_get(fe, stream, &list) <= 0) {
2146 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2147 fe->dai_link->name, stream ? "capture" : "playback");
2148 }
2149
2150 /* calculate valid and active FE <-> BE dpcms */
2151 dpcm_process_paths(fe, stream, &list, 1);
2152
2153 ret = dpcm_fe_dai_startup(fe_substream);
2154 if (ret < 0) {
2155 /* clean up all links */
2156 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2157 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2158
2159 dpcm_be_disconnect(fe, stream);
2160 fe->dpcm[stream].runtime = NULL;
2161 }
2162
2163 dpcm_clear_pending_state(fe, stream);
2164 dpcm_path_put(&list);
2165 mutex_unlock(&fe->card->mutex);
2166 return ret;
2167 }
2168
2169 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2170 {
2171 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2172 struct snd_soc_dpcm *dpcm;
2173 int stream = fe_substream->stream, ret;
2174
2175 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2176 ret = dpcm_fe_dai_shutdown(fe_substream);
2177
2178 /* mark FE's links ready to prune */
2179 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2180 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2181
2182 dpcm_be_disconnect(fe, stream);
2183
2184 fe->dpcm[stream].runtime = NULL;
2185 mutex_unlock(&fe->card->mutex);
2186 return ret;
2187 }
2188
2189 /* create a new pcm */
2190 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2191 {
2192 struct snd_soc_platform *platform = rtd->platform;
2193 struct snd_soc_dai *codec_dai = rtd->codec_dai;
2194 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2195 struct snd_pcm *pcm;
2196 char new_name[64];
2197 int ret = 0, playback = 0, capture = 0;
2198
2199 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2200 playback = rtd->dai_link->dpcm_playback;
2201 capture = rtd->dai_link->dpcm_capture;
2202 } else {
2203 if (codec_dai->driver->playback.channels_min &&
2204 cpu_dai->driver->playback.channels_min)
2205 playback = 1;
2206 if (codec_dai->driver->capture.channels_min &&
2207 cpu_dai->driver->capture.channels_min)
2208 capture = 1;
2209 }
2210
2211 if (rtd->dai_link->playback_only) {
2212 playback = 1;
2213 capture = 0;
2214 }
2215
2216 if (rtd->dai_link->capture_only) {
2217 playback = 0;
2218 capture = 1;
2219 }
2220
2221 /* create the PCM */
2222 if (rtd->dai_link->no_pcm) {
2223 snprintf(new_name, sizeof(new_name), "(%s)",
2224 rtd->dai_link->stream_name);
2225
2226 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2227 playback, capture, &pcm);
2228 } else {
2229 if (rtd->dai_link->dynamic)
2230 snprintf(new_name, sizeof(new_name), "%s (*)",
2231 rtd->dai_link->stream_name);
2232 else
2233 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2234 rtd->dai_link->stream_name, codec_dai->name, num);
2235
2236 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2237 capture, &pcm);
2238 }
2239 if (ret < 0) {
2240 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2241 rtd->dai_link->name);
2242 return ret;
2243 }
2244 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2245
2246 /* DAPM dai link stream work */
2247 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2248
2249 rtd->pcm = pcm;
2250 pcm->private_data = rtd;
2251
2252 if (rtd->dai_link->no_pcm) {
2253 if (playback)
2254 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2255 if (capture)
2256 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2257 goto out;
2258 }
2259
2260 /* ASoC PCM operations */
2261 if (rtd->dai_link->dynamic) {
2262 rtd->ops.open = dpcm_fe_dai_open;
2263 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2264 rtd->ops.prepare = dpcm_fe_dai_prepare;
2265 rtd->ops.trigger = dpcm_fe_dai_trigger;
2266 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2267 rtd->ops.close = dpcm_fe_dai_close;
2268 rtd->ops.pointer = soc_pcm_pointer;
2269 rtd->ops.ioctl = soc_pcm_ioctl;
2270 } else {
2271 rtd->ops.open = soc_pcm_open;
2272 rtd->ops.hw_params = soc_pcm_hw_params;
2273 rtd->ops.prepare = soc_pcm_prepare;
2274 rtd->ops.trigger = soc_pcm_trigger;
2275 rtd->ops.hw_free = soc_pcm_hw_free;
2276 rtd->ops.close = soc_pcm_close;
2277 rtd->ops.pointer = soc_pcm_pointer;
2278 rtd->ops.ioctl = soc_pcm_ioctl;
2279 }
2280
2281 if (platform->driver->ops) {
2282 rtd->ops.ack = platform->driver->ops->ack;
2283 rtd->ops.copy = platform->driver->ops->copy;
2284 rtd->ops.silence = platform->driver->ops->silence;
2285 rtd->ops.page = platform->driver->ops->page;
2286 rtd->ops.mmap = platform->driver->ops->mmap;
2287 }
2288
2289 if (playback)
2290 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2291
2292 if (capture)
2293 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2294
2295 if (platform->driver->pcm_new) {
2296 ret = platform->driver->pcm_new(rtd);
2297 if (ret < 0) {
2298 dev_err(platform->dev,
2299 "ASoC: pcm constructor failed: %d\n",
2300 ret);
2301 return ret;
2302 }
2303 }
2304
2305 pcm->private_free = platform->driver->pcm_free;
2306 out:
2307 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n", codec_dai->name,
2308 cpu_dai->name);
2309 return ret;
2310 }
2311
2312 /* is the current PCM operation for this FE ? */
2313 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2314 {
2315 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2316 return 1;
2317 return 0;
2318 }
2319 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2320
2321 /* is the current PCM operation for this BE ? */
2322 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2323 struct snd_soc_pcm_runtime *be, int stream)
2324 {
2325 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2326 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2327 be->dpcm[stream].runtime_update))
2328 return 1;
2329 return 0;
2330 }
2331 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2332
2333 /* get the substream for this BE */
2334 struct snd_pcm_substream *
2335 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2336 {
2337 return be->pcm->streams[stream].substream;
2338 }
2339 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2340
2341 /* get the BE runtime state */
2342 enum snd_soc_dpcm_state
2343 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2344 {
2345 return be->dpcm[stream].state;
2346 }
2347 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
2348
2349 /* set the BE runtime state */
2350 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
2351 int stream, enum snd_soc_dpcm_state state)
2352 {
2353 be->dpcm[stream].state = state;
2354 }
2355 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
2356
2357 /*
2358 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2359 * are not running, paused or suspended for the specified stream direction.
2360 */
2361 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2362 struct snd_soc_pcm_runtime *be, int stream)
2363 {
2364 struct snd_soc_dpcm *dpcm;
2365 int state;
2366
2367 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2368
2369 if (dpcm->fe == fe)
2370 continue;
2371
2372 state = dpcm->fe->dpcm[stream].state;
2373 if (state == SND_SOC_DPCM_STATE_START ||
2374 state == SND_SOC_DPCM_STATE_PAUSED ||
2375 state == SND_SOC_DPCM_STATE_SUSPEND)
2376 return 0;
2377 }
2378
2379 /* it's safe to free/stop this BE DAI */
2380 return 1;
2381 }
2382 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2383
2384 /*
2385 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2386 * running, paused or suspended for the specified stream direction.
2387 */
2388 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2389 struct snd_soc_pcm_runtime *be, int stream)
2390 {
2391 struct snd_soc_dpcm *dpcm;
2392 int state;
2393
2394 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2395
2396 if (dpcm->fe == fe)
2397 continue;
2398
2399 state = dpcm->fe->dpcm[stream].state;
2400 if (state == SND_SOC_DPCM_STATE_START ||
2401 state == SND_SOC_DPCM_STATE_PAUSED ||
2402 state == SND_SOC_DPCM_STATE_SUSPEND ||
2403 state == SND_SOC_DPCM_STATE_PREPARE)
2404 return 0;
2405 }
2406
2407 /* it's safe to change hw_params */
2408 return 1;
2409 }
2410 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2411
2412 int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
2413 int cmd, struct snd_soc_platform *platform)
2414 {
2415 if (platform->driver->ops && platform->driver->ops->trigger)
2416 return platform->driver->ops->trigger(substream, cmd);
2417 return 0;
2418 }
2419 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger);
2420
2421 #ifdef CONFIG_DEBUG_FS
2422 static char *dpcm_state_string(enum snd_soc_dpcm_state state)
2423 {
2424 switch (state) {
2425 case SND_SOC_DPCM_STATE_NEW:
2426 return "new";
2427 case SND_SOC_DPCM_STATE_OPEN:
2428 return "open";
2429 case SND_SOC_DPCM_STATE_HW_PARAMS:
2430 return "hw_params";
2431 case SND_SOC_DPCM_STATE_PREPARE:
2432 return "prepare";
2433 case SND_SOC_DPCM_STATE_START:
2434 return "start";
2435 case SND_SOC_DPCM_STATE_STOP:
2436 return "stop";
2437 case SND_SOC_DPCM_STATE_SUSPEND:
2438 return "suspend";
2439 case SND_SOC_DPCM_STATE_PAUSED:
2440 return "paused";
2441 case SND_SOC_DPCM_STATE_HW_FREE:
2442 return "hw_free";
2443 case SND_SOC_DPCM_STATE_CLOSE:
2444 return "close";
2445 }
2446
2447 return "unknown";
2448 }
2449
2450 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2451 int stream, char *buf, size_t size)
2452 {
2453 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2454 struct snd_soc_dpcm *dpcm;
2455 ssize_t offset = 0;
2456
2457 /* FE state */
2458 offset += snprintf(buf + offset, size - offset,
2459 "[%s - %s]\n", fe->dai_link->name,
2460 stream ? "Capture" : "Playback");
2461
2462 offset += snprintf(buf + offset, size - offset, "State: %s\n",
2463 dpcm_state_string(fe->dpcm[stream].state));
2464
2465 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2466 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2467 offset += snprintf(buf + offset, size - offset,
2468 "Hardware Params: "
2469 "Format = %s, Channels = %d, Rate = %d\n",
2470 snd_pcm_format_name(params_format(params)),
2471 params_channels(params),
2472 params_rate(params));
2473
2474 /* BEs state */
2475 offset += snprintf(buf + offset, size - offset, "Backends:\n");
2476
2477 if (list_empty(&fe->dpcm[stream].be_clients)) {
2478 offset += snprintf(buf + offset, size - offset,
2479 " No active DSP links\n");
2480 goto out;
2481 }
2482
2483 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2484 struct snd_soc_pcm_runtime *be = dpcm->be;
2485 params = &dpcm->hw_params;
2486
2487 offset += snprintf(buf + offset, size - offset,
2488 "- %s\n", be->dai_link->name);
2489
2490 offset += snprintf(buf + offset, size - offset,
2491 " State: %s\n",
2492 dpcm_state_string(be->dpcm[stream].state));
2493
2494 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2495 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2496 offset += snprintf(buf + offset, size - offset,
2497 " Hardware Params: "
2498 "Format = %s, Channels = %d, Rate = %d\n",
2499 snd_pcm_format_name(params_format(params)),
2500 params_channels(params),
2501 params_rate(params));
2502 }
2503
2504 out:
2505 return offset;
2506 }
2507
2508 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
2509 size_t count, loff_t *ppos)
2510 {
2511 struct snd_soc_pcm_runtime *fe = file->private_data;
2512 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
2513 char *buf;
2514
2515 buf = kmalloc(out_count, GFP_KERNEL);
2516 if (!buf)
2517 return -ENOMEM;
2518
2519 if (fe->cpu_dai->driver->playback.channels_min)
2520 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
2521 buf + offset, out_count - offset);
2522
2523 if (fe->cpu_dai->driver->capture.channels_min)
2524 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
2525 buf + offset, out_count - offset);
2526
2527 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
2528
2529 kfree(buf);
2530 return ret;
2531 }
2532
2533 static const struct file_operations dpcm_state_fops = {
2534 .open = simple_open,
2535 .read = dpcm_state_read_file,
2536 .llseek = default_llseek,
2537 };
2538
2539 int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
2540 {
2541 if (!rtd->dai_link)
2542 return 0;
2543
2544 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
2545 rtd->card->debugfs_card_root);
2546 if (!rtd->debugfs_dpcm_root) {
2547 dev_dbg(rtd->dev,
2548 "ASoC: Failed to create dpcm debugfs directory %s\n",
2549 rtd->dai_link->name);
2550 return -EINVAL;
2551 }
2552
2553 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
2554 rtd->debugfs_dpcm_root,
2555 rtd, &dpcm_state_fops);
2556
2557 return 0;
2558 }
2559 #endif
Linux with added FPC-III support