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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/pm_runtime.h>
23#include <linux/slab.h>
24#include <linux/workqueue.h>
25#include <linux/export.h>
26#include <linux/debugfs.h>
27#include <sound/core.h>
28#include <sound/pcm.h>
29#include <sound/pcm_params.h>
30#include <sound/soc.h>
31#include <sound/soc-dpcm.h>
32#include <sound/initval.h>
33
34#define DPCM_MAX_BE_USERS 8
35
36/* DPCM stream event, send event to FE and all active BEs. */
37static int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
38 int event)
39{
40 struct snd_soc_dpcm *dpcm;
41
42 list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
43
44 struct snd_soc_pcm_runtime *be = dpcm->be;
45
46 dev_dbg(be->dev, "pm: BE %s event %d dir %d\n",
47 be->dai_link->name, event, dir);
48
49 snd_soc_dapm_stream_event(be, dir, event);
50 }
51
52 snd_soc_dapm_stream_event(fe, dir, event);
53
54 return 0;
55}
56
57static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
58 struct snd_soc_dai *soc_dai)
59{
60 struct snd_soc_pcm_runtime *rtd = substream->private_data;
61 int ret;
62
63 if (!soc_dai->driver->symmetric_rates &&
64 !rtd->dai_link->symmetric_rates)
65 return 0;
66
67 /* This can happen if multiple streams are starting simultaneously -
68 * the second can need to get its constraints before the first has
69 * picked a rate. Complain and allow the application to carry on.
70 */
71 if (!soc_dai->rate) {
72 dev_warn(soc_dai->dev,
73 "Not enforcing symmetric_rates due to race\n");
74 return 0;
75 }
76
77 dev_dbg(soc_dai->dev, "Symmetry forces %dHz rate\n", soc_dai->rate);
78
79 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
80 SNDRV_PCM_HW_PARAM_RATE,
81 soc_dai->rate, soc_dai->rate);
82 if (ret < 0) {
83 dev_err(soc_dai->dev,
84 "Unable to apply rate symmetry constraint: %d\n", ret);
85 return ret;
86 }
87
88 return 0;
89}
90
91/*
92 * List of sample sizes that might go over the bus for parameter
93 * application. There ought to be a wildcard sample size for things
94 * like the DAC/ADC resolution to use but there isn't right now.
95 */
96static int sample_sizes[] = {
97 24, 32,
98};
99
100static void soc_pcm_apply_msb(struct snd_pcm_substream *substream,
101 struct snd_soc_dai *dai)
102{
103 int ret, i, bits;
104
105 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
106 bits = dai->driver->playback.sig_bits;
107 else
108 bits = dai->driver->capture.sig_bits;
109
110 if (!bits)
111 return;
112
113 for (i = 0; i < ARRAY_SIZE(sample_sizes); i++) {
114 if (bits >= sample_sizes[i])
115 continue;
116
117 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0,
118 sample_sizes[i], bits);
119 if (ret != 0)
120 dev_warn(dai->dev,
121 "Failed to set MSB %d/%d: %d\n",
122 bits, sample_sizes[i], ret);
123 }
124}
125
126/*
127 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
128 * then initialized and any private data can be allocated. This also calls
129 * startup for the cpu DAI, platform, machine and codec DAI.
130 */
131static int soc_pcm_open(struct snd_pcm_substream *substream)
132{
133 struct snd_soc_pcm_runtime *rtd = substream->private_data;
134 struct snd_pcm_runtime *runtime = substream->runtime;
135 struct snd_soc_platform *platform = rtd->platform;
136 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
137 struct snd_soc_dai *codec_dai = rtd->codec_dai;
138 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
139 struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
140 int ret = 0;
141
142 pm_runtime_get_sync(cpu_dai->dev);
143 pm_runtime_get_sync(codec_dai->dev);
144 pm_runtime_get_sync(platform->dev);
145
146 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
147
148 /* startup the audio subsystem */
149 if (cpu_dai->driver->ops->startup) {
150 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
151 if (ret < 0) {
152 dev_err(cpu_dai->dev, "can't open interface %s: %d\n",
153 cpu_dai->name, ret);
154 goto out;
155 }
156 }
157
158 if (platform->driver->ops && platform->driver->ops->open) {
159 ret = platform->driver->ops->open(substream);
160 if (ret < 0) {
161 dev_err(platform->dev, "can't open platform %s: %d\n",
162 platform->name, ret);
163 goto platform_err;
164 }
165 }
166
167 if (codec_dai->driver->ops->startup) {
168 ret = codec_dai->driver->ops->startup(substream, codec_dai);
169 if (ret < 0) {
170 dev_err(codec_dai->dev, "can't open codec %s: %d\n",
171 codec_dai->name, ret);
172 goto codec_dai_err;
173 }
174 }
175
176 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
177 ret = rtd->dai_link->ops->startup(substream);
178 if (ret < 0) {
179 pr_err("asoc: %s startup failed: %d\n",
180 rtd->dai_link->name, ret);
181 goto machine_err;
182 }
183 }
184
185 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
186 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
187 goto dynamic;
188
189 /* Check that the codec and cpu DAIs are compatible */
190 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
191 runtime->hw.rate_min =
192 max(codec_dai_drv->playback.rate_min,
193 cpu_dai_drv->playback.rate_min);
194 runtime->hw.rate_max =
195 min(codec_dai_drv->playback.rate_max,
196 cpu_dai_drv->playback.rate_max);
197 runtime->hw.channels_min =
198 max(codec_dai_drv->playback.channels_min,
199 cpu_dai_drv->playback.channels_min);
200 runtime->hw.channels_max =
201 min(codec_dai_drv->playback.channels_max,
202 cpu_dai_drv->playback.channels_max);
203 runtime->hw.formats =
204 codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
205 runtime->hw.rates =
206 codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
207 if (codec_dai_drv->playback.rates
208 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
209 runtime->hw.rates |= cpu_dai_drv->playback.rates;
210 if (cpu_dai_drv->playback.rates
211 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
212 runtime->hw.rates |= codec_dai_drv->playback.rates;
213 } else {
214 runtime->hw.rate_min =
215 max(codec_dai_drv->capture.rate_min,
216 cpu_dai_drv->capture.rate_min);
217 runtime->hw.rate_max =
218 min(codec_dai_drv->capture.rate_max,
219 cpu_dai_drv->capture.rate_max);
220 runtime->hw.channels_min =
221 max(codec_dai_drv->capture.channels_min,
222 cpu_dai_drv->capture.channels_min);
223 runtime->hw.channels_max =
224 min(codec_dai_drv->capture.channels_max,
225 cpu_dai_drv->capture.channels_max);
226 runtime->hw.formats =
227 codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
228 runtime->hw.rates =
229 codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
230 if (codec_dai_drv->capture.rates
231 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
232 runtime->hw.rates |= cpu_dai_drv->capture.rates;
233 if (cpu_dai_drv->capture.rates
234 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
235 runtime->hw.rates |= codec_dai_drv->capture.rates;
236 }
237
238 ret = -EINVAL;
239 snd_pcm_limit_hw_rates(runtime);
240 if (!runtime->hw.rates) {
241 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
242 codec_dai->name, cpu_dai->name);
243 goto config_err;
244 }
245 if (!runtime->hw.formats) {
246 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
247 codec_dai->name, cpu_dai->name);
248 goto config_err;
249 }
250 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
251 runtime->hw.channels_min > runtime->hw.channels_max) {
252 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
253 codec_dai->name, cpu_dai->name);
254 goto config_err;
255 }
256
257 soc_pcm_apply_msb(substream, codec_dai);
258 soc_pcm_apply_msb(substream, cpu_dai);
259
260 /* Symmetry only applies if we've already got an active stream. */
261 if (cpu_dai->active) {
262 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
263 if (ret != 0)
264 goto config_err;
265 }
266
267 if (codec_dai->active) {
268 ret = soc_pcm_apply_symmetry(substream, codec_dai);
269 if (ret != 0)
270 goto config_err;
271 }
272
273 pr_debug("asoc: %s <-> %s info:\n",
274 codec_dai->name, cpu_dai->name);
275 pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
276 pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
277 runtime->hw.channels_max);
278 pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
279 runtime->hw.rate_max);
280
281dynamic:
282 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
283 cpu_dai->playback_active++;
284 codec_dai->playback_active++;
285 } else {
286 cpu_dai->capture_active++;
287 codec_dai->capture_active++;
288 }
289 cpu_dai->active++;
290 codec_dai->active++;
291 rtd->codec->active++;
292 mutex_unlock(&rtd->pcm_mutex);
293 return 0;
294
295config_err:
296 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
297 rtd->dai_link->ops->shutdown(substream);
298
299machine_err:
300 if (codec_dai->driver->ops->shutdown)
301 codec_dai->driver->ops->shutdown(substream, codec_dai);
302
303codec_dai_err:
304 if (platform->driver->ops && platform->driver->ops->close)
305 platform->driver->ops->close(substream);
306
307platform_err:
308 if (cpu_dai->driver->ops->shutdown)
309 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
310out:
311 mutex_unlock(&rtd->pcm_mutex);
312
313 pm_runtime_put(platform->dev);
314 pm_runtime_put(codec_dai->dev);
315 pm_runtime_put(cpu_dai->dev);
316
317 return ret;
318}
319
320/*
321 * Power down the audio subsystem pmdown_time msecs after close is called.
322 * This is to ensure there are no pops or clicks in between any music tracks
323 * due to DAPM power cycling.
324 */
325static void close_delayed_work(struct work_struct *work)
326{
327 struct snd_soc_pcm_runtime *rtd =
328 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
329 struct snd_soc_dai *codec_dai = rtd->codec_dai;
330
331 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
332
333 pr_debug("pop wq checking: %s status: %s waiting: %s\n",
334 codec_dai->driver->playback.stream_name,
335 codec_dai->playback_active ? "active" : "inactive",
336 codec_dai->pop_wait ? "yes" : "no");
337
338 /* are we waiting on this codec DAI stream */
339 if (codec_dai->pop_wait == 1) {
340 codec_dai->pop_wait = 0;
341 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
342 SND_SOC_DAPM_STREAM_STOP);
343 }
344
345 mutex_unlock(&rtd->pcm_mutex);
346}
347
348/*
349 * Called by ALSA when a PCM substream is closed. Private data can be
350 * freed here. The cpu DAI, codec DAI, machine and platform are also
351 * shutdown.
352 */
353static int soc_pcm_close(struct snd_pcm_substream *substream)
354{
355 struct snd_soc_pcm_runtime *rtd = substream->private_data;
356 struct snd_soc_platform *platform = rtd->platform;
357 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
358 struct snd_soc_dai *codec_dai = rtd->codec_dai;
359 struct snd_soc_codec *codec = rtd->codec;
360
361 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
362
363 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
364 cpu_dai->playback_active--;
365 codec_dai->playback_active--;
366 } else {
367 cpu_dai->capture_active--;
368 codec_dai->capture_active--;
369 }
370
371 cpu_dai->active--;
372 codec_dai->active--;
373 codec->active--;
374
375 /* clear the corresponding DAIs rate when inactive */
376 if (!cpu_dai->active)
377 cpu_dai->rate = 0;
378
379 if (!codec_dai->active)
380 codec_dai->rate = 0;
381
382 /* Muting the DAC suppresses artifacts caused during digital
383 * shutdown, for example from stopping clocks.
384 */
385 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
386 snd_soc_dai_digital_mute(codec_dai, 1);
387
388 if (cpu_dai->driver->ops->shutdown)
389 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
390
391 if (codec_dai->driver->ops->shutdown)
392 codec_dai->driver->ops->shutdown(substream, codec_dai);
393
394 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
395 rtd->dai_link->ops->shutdown(substream);
396
397 if (platform->driver->ops && platform->driver->ops->close)
398 platform->driver->ops->close(substream);
399 cpu_dai->runtime = NULL;
400
401 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
402 if (!rtd->pmdown_time || codec->ignore_pmdown_time ||
403 rtd->dai_link->ignore_pmdown_time) {
404 /* powered down playback stream now */
405 snd_soc_dapm_stream_event(rtd,
406 SNDRV_PCM_STREAM_PLAYBACK,
407 SND_SOC_DAPM_STREAM_STOP);
408 } else {
409 /* start delayed pop wq here for playback streams */
410 codec_dai->pop_wait = 1;
411 schedule_delayed_work(&rtd->delayed_work,
412 msecs_to_jiffies(rtd->pmdown_time));
413 }
414 } else {
415 /* capture streams can be powered down now */
416 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
417 SND_SOC_DAPM_STREAM_STOP);
418 }
419
420 mutex_unlock(&rtd->pcm_mutex);
421
422 pm_runtime_put(platform->dev);
423 pm_runtime_put(codec_dai->dev);
424 pm_runtime_put(cpu_dai->dev);
425
426 return 0;
427}
428
429/*
430 * Called by ALSA when the PCM substream is prepared, can set format, sample
431 * rate, etc. This function is non atomic and can be called multiple times,
432 * it can refer to the runtime info.
433 */
434static int soc_pcm_prepare(struct snd_pcm_substream *substream)
435{
436 struct snd_soc_pcm_runtime *rtd = substream->private_data;
437 struct snd_soc_platform *platform = rtd->platform;
438 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
439 struct snd_soc_dai *codec_dai = rtd->codec_dai;
440 int ret = 0;
441
442 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
443
444 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
445 ret = rtd->dai_link->ops->prepare(substream);
446 if (ret < 0) {
447 pr_err("asoc: machine prepare error: %d\n", ret);
448 goto out;
449 }
450 }
451
452 if (platform->driver->ops && platform->driver->ops->prepare) {
453 ret = platform->driver->ops->prepare(substream);
454 if (ret < 0) {
455 dev_err(platform->dev, "platform prepare error: %d\n",
456 ret);
457 goto out;
458 }
459 }
460
461 if (codec_dai->driver->ops->prepare) {
462 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
463 if (ret < 0) {
464 dev_err(codec_dai->dev, "DAI prepare error: %d\n",
465 ret);
466 goto out;
467 }
468 }
469
470 if (cpu_dai->driver->ops->prepare) {
471 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
472 if (ret < 0) {
473 dev_err(cpu_dai->dev, "DAI prepare error: %d\n",
474 ret);
475 goto out;
476 }
477 }
478
479 /* cancel any delayed stream shutdown that is pending */
480 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
481 codec_dai->pop_wait) {
482 codec_dai->pop_wait = 0;
483 cancel_delayed_work(&rtd->delayed_work);
484 }
485
486 snd_soc_dapm_stream_event(rtd, substream->stream,
487 SND_SOC_DAPM_STREAM_START);
488
489 snd_soc_dai_digital_mute(codec_dai, 0);
490
491out:
492 mutex_unlock(&rtd->pcm_mutex);
493 return ret;
494}
495
496/*
497 * Called by ALSA when the hardware params are set by application. This
498 * function can also be called multiple times and can allocate buffers
499 * (using snd_pcm_lib_* ). It's non-atomic.
500 */
501static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
502 struct snd_pcm_hw_params *params)
503{
504 struct snd_soc_pcm_runtime *rtd = substream->private_data;
505 struct snd_soc_platform *platform = rtd->platform;
506 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
507 struct snd_soc_dai *codec_dai = rtd->codec_dai;
508 int ret = 0;
509
510 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
511
512 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
513 ret = rtd->dai_link->ops->hw_params(substream, params);
514 if (ret < 0) {
515 pr_err("asoc: machine hw_params failed: %d\n", ret);
516 goto out;
517 }
518 }
519
520 if (codec_dai->driver->ops->hw_params) {
521 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
522 if (ret < 0) {
523 dev_err(codec_dai->dev, "can't set %s hw params: %d\n",
524 codec_dai->name, ret);
525 goto codec_err;
526 }
527 }
528
529 if (cpu_dai->driver->ops->hw_params) {
530 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
531 if (ret < 0) {
532 dev_err(cpu_dai->dev, "%s hw params failed: %d\n",
533 cpu_dai->name, ret);
534 goto interface_err;
535 }
536 }
537
538 if (platform->driver->ops && platform->driver->ops->hw_params) {
539 ret = platform->driver->ops->hw_params(substream, params);
540 if (ret < 0) {
541 dev_err(platform->dev, "%s hw params failed: %d\n",
542 platform->name, ret);
543 goto platform_err;
544 }
545 }
546
547 /* store the rate for each DAIs */
548 cpu_dai->rate = params_rate(params);
549 codec_dai->rate = params_rate(params);
550
551out:
552 mutex_unlock(&rtd->pcm_mutex);
553 return ret;
554
555platform_err:
556 if (cpu_dai->driver->ops->hw_free)
557 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
558
559interface_err:
560 if (codec_dai->driver->ops->hw_free)
561 codec_dai->driver->ops->hw_free(substream, codec_dai);
562
563codec_err:
564 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
565 rtd->dai_link->ops->hw_free(substream);
566
567 mutex_unlock(&rtd->pcm_mutex);
568 return ret;
569}
570
571/*
572 * Frees resources allocated by hw_params, can be called multiple times
573 */
574static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
575{
576 struct snd_soc_pcm_runtime *rtd = substream->private_data;
577 struct snd_soc_platform *platform = rtd->platform;
578 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
579 struct snd_soc_dai *codec_dai = rtd->codec_dai;
580 struct snd_soc_codec *codec = rtd->codec;
581
582 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
583
584 /* apply codec digital mute */
585 if (!codec->active)
586 snd_soc_dai_digital_mute(codec_dai, 1);
587
588 /* free any machine hw params */
589 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
590 rtd->dai_link->ops->hw_free(substream);
591
592 /* free any DMA resources */
593 if (platform->driver->ops && platform->driver->ops->hw_free)
594 platform->driver->ops->hw_free(substream);
595
596 /* now free hw params for the DAIs */
597 if (codec_dai->driver->ops->hw_free)
598 codec_dai->driver->ops->hw_free(substream, codec_dai);
599
600 if (cpu_dai->driver->ops->hw_free)
601 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
602
603 mutex_unlock(&rtd->pcm_mutex);
604 return 0;
605}
606
607static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
608{
609 struct snd_soc_pcm_runtime *rtd = substream->private_data;
610 struct snd_soc_platform *platform = rtd->platform;
611 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
612 struct snd_soc_dai *codec_dai = rtd->codec_dai;
613 int ret;
614
615 if (codec_dai->driver->ops->trigger) {
616 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
617 if (ret < 0)
618 return ret;
619 }
620
621 if (platform->driver->ops && platform->driver->ops->trigger) {
622 ret = platform->driver->ops->trigger(substream, cmd);
623 if (ret < 0)
624 return ret;
625 }
626
627 if (cpu_dai->driver->ops->trigger) {
628 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
629 if (ret < 0)
630 return ret;
631 }
632 return 0;
633}
634
635static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
636 int cmd)
637{
638 struct snd_soc_pcm_runtime *rtd = substream->private_data;
639 struct snd_soc_platform *platform = rtd->platform;
640 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
641 struct snd_soc_dai *codec_dai = rtd->codec_dai;
642 int ret;
643
644 if (codec_dai->driver->ops->bespoke_trigger) {
645 ret = codec_dai->driver->ops->bespoke_trigger(substream, cmd, codec_dai);
646 if (ret < 0)
647 return ret;
648 }
649
650 if (platform->driver->bespoke_trigger) {
651 ret = platform->driver->bespoke_trigger(substream, cmd);
652 if (ret < 0)
653 return ret;
654 }
655
656 if (cpu_dai->driver->ops->bespoke_trigger) {
657 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
658 if (ret < 0)
659 return ret;
660 }
661 return 0;
662}
663/*
664 * soc level wrapper for pointer callback
665 * If cpu_dai, codec_dai, platform driver has the delay callback, than
666 * the runtime->delay will be updated accordingly.
667 */
668static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
669{
670 struct snd_soc_pcm_runtime *rtd = substream->private_data;
671 struct snd_soc_platform *platform = rtd->platform;
672 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
673 struct snd_soc_dai *codec_dai = rtd->codec_dai;
674 struct snd_pcm_runtime *runtime = substream->runtime;
675 snd_pcm_uframes_t offset = 0;
676 snd_pcm_sframes_t delay = 0;
677
678 if (platform->driver->ops && platform->driver->ops->pointer)
679 offset = platform->driver->ops->pointer(substream);
680
681 if (cpu_dai->driver->ops->delay)
682 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
683
684 if (codec_dai->driver->ops->delay)
685 delay += codec_dai->driver->ops->delay(substream, codec_dai);
686
687 if (platform->driver->delay)
688 delay += platform->driver->delay(substream, codec_dai);
689
690 runtime->delay = delay;
691
692 return offset;
693}
694
695/* connect a FE and BE */
696static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
697 struct snd_soc_pcm_runtime *be, int stream)
698{
699 struct snd_soc_dpcm *dpcm;
700
701 /* only add new dpcms */
702 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
703 if (dpcm->be == be && dpcm->fe == fe)
704 return 0;
705 }
706
707 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
708 if (!dpcm)
709 return -ENOMEM;
710
711 dpcm->be = be;
712 dpcm->fe = fe;
713 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
714 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
715 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
716 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
717
718 dev_dbg(fe->dev, " connected new DPCM %s path %s %s %s\n",
719 stream ? "capture" : "playback", fe->dai_link->name,
720 stream ? "<-" : "->", be->dai_link->name);
721
722#ifdef CONFIG_DEBUG_FS
723 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
724 fe->debugfs_dpcm_root, &dpcm->state);
725#endif
726 return 1;
727}
728
729/* reparent a BE onto another FE */
730static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
731 struct snd_soc_pcm_runtime *be, int stream)
732{
733 struct snd_soc_dpcm *dpcm;
734 struct snd_pcm_substream *fe_substream, *be_substream;
735
736 /* reparent if BE is connected to other FEs */
737 if (!be->dpcm[stream].users)
738 return;
739
740 be_substream = snd_soc_dpcm_get_substream(be, stream);
741
742 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
743 if (dpcm->fe == fe)
744 continue;
745
746 dev_dbg(fe->dev, " reparent %s path %s %s %s\n",
747 stream ? "capture" : "playback",
748 dpcm->fe->dai_link->name,
749 stream ? "<-" : "->", dpcm->be->dai_link->name);
750
751 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
752 be_substream->runtime = fe_substream->runtime;
753 break;
754 }
755}
756
757/* disconnect a BE and FE */
758static void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
759{
760 struct snd_soc_dpcm *dpcm, *d;
761
762 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
763 dev_dbg(fe->dev, "BE %s disconnect check for %s\n",
764 stream ? "capture" : "playback",
765 dpcm->be->dai_link->name);
766
767 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
768 continue;
769
770 dev_dbg(fe->dev, " freed DSP %s path %s %s %s\n",
771 stream ? "capture" : "playback", fe->dai_link->name,
772 stream ? "<-" : "->", dpcm->be->dai_link->name);
773
774 /* BEs still alive need new FE */
775 dpcm_be_reparent(fe, dpcm->be, stream);
776
777#ifdef CONFIG_DEBUG_FS
778 debugfs_remove(dpcm->debugfs_state);
779#endif
780 list_del(&dpcm->list_be);
781 list_del(&dpcm->list_fe);
782 kfree(dpcm);
783 }
784}
785
786/* get BE for DAI widget and stream */
787static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
788 struct snd_soc_dapm_widget *widget, int stream)
789{
790 struct snd_soc_pcm_runtime *be;
791 int i;
792
793 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
794 for (i = 0; i < card->num_links; i++) {
795 be = &card->rtd[i];
796
797 if (!be->dai_link->no_pcm)
798 continue;
799
800 if (be->cpu_dai->playback_widget == widget ||
801 be->codec_dai->playback_widget == widget)
802 return be;
803 }
804 } else {
805
806 for (i = 0; i < card->num_links; i++) {
807 be = &card->rtd[i];
808
809 if (!be->dai_link->no_pcm)
810 continue;
811
812 if (be->cpu_dai->capture_widget == widget ||
813 be->codec_dai->capture_widget == widget)
814 return be;
815 }
816 }
817
818 dev_err(card->dev, "can't get %s BE for %s\n",
819 stream ? "capture" : "playback", widget->name);
820 return NULL;
821}
822
823static inline struct snd_soc_dapm_widget *
824 rtd_get_cpu_widget(struct snd_soc_pcm_runtime *rtd, int stream)
825{
826 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
827 return rtd->cpu_dai->playback_widget;
828 else
829 return rtd->cpu_dai->capture_widget;
830}
831
832static inline struct snd_soc_dapm_widget *
833 rtd_get_codec_widget(struct snd_soc_pcm_runtime *rtd, int stream)
834{
835 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
836 return rtd->codec_dai->playback_widget;
837 else
838 return rtd->codec_dai->capture_widget;
839}
840
841static int widget_in_list(struct snd_soc_dapm_widget_list *list,
842 struct snd_soc_dapm_widget *widget)
843{
844 int i;
845
846 for (i = 0; i < list->num_widgets; i++) {
847 if (widget == list->widgets[i])
848 return 1;
849 }
850
851 return 0;
852}
853
854static int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
855 int stream, struct snd_soc_dapm_widget_list **list_)
856{
857 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
858 struct snd_soc_dapm_widget_list *list;
859 int paths;
860
861 list = kzalloc(sizeof(struct snd_soc_dapm_widget_list) +
862 sizeof(struct snd_soc_dapm_widget *), GFP_KERNEL);
863 if (list == NULL)
864 return -ENOMEM;
865
866 /* get number of valid DAI paths and their widgets */
867 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, &list);
868
869 dev_dbg(fe->dev, "found %d audio %s paths\n", paths,
870 stream ? "capture" : "playback");
871
872 *list_ = list;
873 return paths;
874}
875
876static inline void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
877{
878 kfree(*list);
879}
880
881static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
882 struct snd_soc_dapm_widget_list **list_)
883{
884 struct snd_soc_dpcm *dpcm;
885 struct snd_soc_dapm_widget_list *list = *list_;
886 struct snd_soc_dapm_widget *widget;
887 int prune = 0;
888
889 /* Destroy any old FE <--> BE connections */
890 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
891
892 /* is there a valid CPU DAI widget for this BE */
893 widget = rtd_get_cpu_widget(dpcm->be, stream);
894
895 /* prune the BE if it's no longer in our active list */
896 if (widget && widget_in_list(list, widget))
897 continue;
898
899 /* is there a valid CODEC DAI widget for this BE */
900 widget = rtd_get_codec_widget(dpcm->be, stream);
901
902 /* prune the BE if it's no longer in our active list */
903 if (widget && widget_in_list(list, widget))
904 continue;
905
906 dev_dbg(fe->dev, "pruning %s BE %s for %s\n",
907 stream ? "capture" : "playback",
908 dpcm->be->dai_link->name, fe->dai_link->name);
909 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
910 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
911 prune++;
912 }
913
914 dev_dbg(fe->dev, "found %d old BE paths for pruning\n", prune);
915 return prune;
916}
917
918static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
919 struct snd_soc_dapm_widget_list **list_)
920{
921 struct snd_soc_card *card = fe->card;
922 struct snd_soc_dapm_widget_list *list = *list_;
923 struct snd_soc_pcm_runtime *be;
924 int i, new = 0, err;
925
926 /* Create any new FE <--> BE connections */
927 for (i = 0; i < list->num_widgets; i++) {
928
929 if (list->widgets[i]->id != snd_soc_dapm_dai)
930 continue;
931
932 /* is there a valid BE rtd for this widget */
933 be = dpcm_get_be(card, list->widgets[i], stream);
934 if (!be) {
935 dev_err(fe->dev, "no BE found for %s\n",
936 list->widgets[i]->name);
937 continue;
938 }
939
940 /* make sure BE is a real BE */
941 if (!be->dai_link->no_pcm)
942 continue;
943
944 /* don't connect if FE is not running */
945 if (!fe->dpcm[stream].runtime)
946 continue;
947
948 /* newly connected FE and BE */
949 err = dpcm_be_connect(fe, be, stream);
950 if (err < 0) {
951 dev_err(fe->dev, "can't connect %s\n",
952 list->widgets[i]->name);
953 break;
954 } else if (err == 0) /* already connected */
955 continue;
956
957 /* new */
958 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
959 new++;
960 }
961
962 dev_dbg(fe->dev, "found %d new BE paths\n", new);
963 return new;
964}
965
966/*
967 * Find the corresponding BE DAIs that source or sink audio to this
968 * FE substream.
969 */
970static int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
971 int stream, struct snd_soc_dapm_widget_list **list, int new)
972{
973 if (new)
974 return dpcm_add_paths(fe, stream, list);
975 else
976 return dpcm_prune_paths(fe, stream, list);
977}
978
979static void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
980{
981 struct snd_soc_dpcm *dpcm;
982
983 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
984 dpcm->be->dpcm[stream].runtime_update =
985 SND_SOC_DPCM_UPDATE_NO;
986}
987
988static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
989 int stream)
990{
991 struct snd_soc_dpcm *dpcm;
992
993 /* disable any enabled and non active backends */
994 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
995
996 struct snd_soc_pcm_runtime *be = dpcm->be;
997 struct snd_pcm_substream *be_substream =
998 snd_soc_dpcm_get_substream(be, stream);
999
1000 if (be->dpcm[stream].users == 0)
1001 dev_err(be->dev, "no users %s at close - state %d\n",
1002 stream ? "capture" : "playback",
1003 be->dpcm[stream].state);
1004
1005 if (--be->dpcm[stream].users != 0)
1006 continue;
1007
1008 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1009 continue;
1010
1011 soc_pcm_close(be_substream);
1012 be_substream->runtime = NULL;
1013 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1014 }
1015}
1016
1017static int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1018{
1019 struct snd_soc_dpcm *dpcm;
1020 int err, count = 0;
1021
1022 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1023 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1024
1025 struct snd_soc_pcm_runtime *be = dpcm->be;
1026 struct snd_pcm_substream *be_substream =
1027 snd_soc_dpcm_get_substream(be, stream);
1028
1029 /* is this op for this BE ? */
1030 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1031 continue;
1032
1033 /* first time the dpcm is open ? */
1034 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1035 dev_err(be->dev, "too many users %s at open %d\n",
1036 stream ? "capture" : "playback",
1037 be->dpcm[stream].state);
1038
1039 if (be->dpcm[stream].users++ != 0)
1040 continue;
1041
1042 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1043 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1044 continue;
1045
1046 dev_dbg(be->dev, "dpcm: open BE %s\n", be->dai_link->name);
1047
1048 be_substream->runtime = be->dpcm[stream].runtime;
1049 err = soc_pcm_open(be_substream);
1050 if (err < 0) {
1051 dev_err(be->dev, "BE open failed %d\n", err);
1052 be->dpcm[stream].users--;
1053 if (be->dpcm[stream].users < 0)
1054 dev_err(be->dev, "no users %s at unwind %d\n",
1055 stream ? "capture" : "playback",
1056 be->dpcm[stream].state);
1057
1058 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1059 goto unwind;
1060 }
1061
1062 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1063 count++;
1064 }
1065
1066 return count;
1067
1068unwind:
1069 /* disable any enabled and non active backends */
1070 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1071 struct snd_soc_pcm_runtime *be = dpcm->be;
1072 struct snd_pcm_substream *be_substream =
1073 snd_soc_dpcm_get_substream(be, stream);
1074
1075 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1076 continue;
1077
1078 if (be->dpcm[stream].users == 0)
1079 dev_err(be->dev, "no users %s at close %d\n",
1080 stream ? "capture" : "playback",
1081 be->dpcm[stream].state);
1082
1083 if (--be->dpcm[stream].users != 0)
1084 continue;
1085
1086 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1087 continue;
1088
1089 soc_pcm_close(be_substream);
1090 be_substream->runtime = NULL;
1091 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1092 }
1093
1094 return err;
1095}
1096
1097static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1098{
1099 struct snd_pcm_runtime *runtime = substream->runtime;
1100 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1101 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1102 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1103
1104 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1105 runtime->hw.rate_min = cpu_dai_drv->playback.rate_min;
1106 runtime->hw.rate_max = cpu_dai_drv->playback.rate_max;
1107 runtime->hw.channels_min = cpu_dai_drv->playback.channels_min;
1108 runtime->hw.channels_max = cpu_dai_drv->playback.channels_max;
1109 runtime->hw.formats &= cpu_dai_drv->playback.formats;
1110 runtime->hw.rates = cpu_dai_drv->playback.rates;
1111 } else {
1112 runtime->hw.rate_min = cpu_dai_drv->capture.rate_min;
1113 runtime->hw.rate_max = cpu_dai_drv->capture.rate_max;
1114 runtime->hw.channels_min = cpu_dai_drv->capture.channels_min;
1115 runtime->hw.channels_max = cpu_dai_drv->capture.channels_max;
1116 runtime->hw.formats &= cpu_dai_drv->capture.formats;
1117 runtime->hw.rates = cpu_dai_drv->capture.rates;
1118 }
1119}
1120
1121static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1122{
1123 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1124 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1125 int stream = fe_substream->stream, ret = 0;
1126
1127 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1128
1129 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1130 if (ret < 0) {
1131 dev_err(fe->dev,"dpcm: failed to start some BEs %d\n", ret);
1132 goto be_err;
1133 }
1134
1135 dev_dbg(fe->dev, "dpcm: open FE %s\n", fe->dai_link->name);
1136
1137 /* start the DAI frontend */
1138 ret = soc_pcm_open(fe_substream);
1139 if (ret < 0) {
1140 dev_err(fe->dev,"dpcm: failed to start FE %d\n", ret);
1141 goto unwind;
1142 }
1143
1144 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1145
1146 dpcm_set_fe_runtime(fe_substream);
1147 snd_pcm_limit_hw_rates(runtime);
1148
1149 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1150 return 0;
1151
1152unwind:
1153 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1154be_err:
1155 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1156 return ret;
1157}
1158
1159static int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1160{
1161 struct snd_soc_dpcm *dpcm;
1162
1163 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1164 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1165
1166 struct snd_soc_pcm_runtime *be = dpcm->be;
1167 struct snd_pcm_substream *be_substream =
1168 snd_soc_dpcm_get_substream(be, stream);
1169
1170 /* is this op for this BE ? */
1171 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1172 continue;
1173
1174 if (be->dpcm[stream].users == 0)
1175 dev_err(be->dev, "no users %s at close - state %d\n",
1176 stream ? "capture" : "playback",
1177 be->dpcm[stream].state);
1178
1179 if (--be->dpcm[stream].users != 0)
1180 continue;
1181
1182 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1183 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1184 continue;
1185
1186 dev_dbg(be->dev, "dpcm: close BE %s\n",
1187 dpcm->fe->dai_link->name);
1188
1189 soc_pcm_close(be_substream);
1190 be_substream->runtime = NULL;
1191
1192 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1193 }
1194 return 0;
1195}
1196
1197static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1198{
1199 struct snd_soc_pcm_runtime *fe = substream->private_data;
1200 int stream = substream->stream;
1201
1202 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1203
1204 /* shutdown the BEs */
1205 dpcm_be_dai_shutdown(fe, substream->stream);
1206
1207 dev_dbg(fe->dev, "dpcm: close FE %s\n", fe->dai_link->name);
1208
1209 /* now shutdown the frontend */
1210 soc_pcm_close(substream);
1211
1212 /* run the stream event for each BE */
1213 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1214
1215 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1216 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1217 return 0;
1218}
1219
1220static int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1221{
1222 struct snd_soc_dpcm *dpcm;
1223
1224 /* only hw_params backends that are either sinks or sources
1225 * to this frontend DAI */
1226 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1227
1228 struct snd_soc_pcm_runtime *be = dpcm->be;
1229 struct snd_pcm_substream *be_substream =
1230 snd_soc_dpcm_get_substream(be, stream);
1231
1232 /* is this op for this BE ? */
1233 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1234 continue;
1235
1236 /* only free hw when no longer used - check all FEs */
1237 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1238 continue;
1239
1240 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1241 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1242 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1243 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1244 continue;
1245
1246 dev_dbg(be->dev, "dpcm: hw_free BE %s\n",
1247 dpcm->fe->dai_link->name);
1248
1249 soc_pcm_hw_free(be_substream);
1250
1251 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1252 }
1253
1254 return 0;
1255}
1256
1257static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1258{
1259 struct snd_soc_pcm_runtime *fe = substream->private_data;
1260 int err, stream = substream->stream;
1261
1262 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1263 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1264
1265 dev_dbg(fe->dev, "dpcm: hw_free FE %s\n", fe->dai_link->name);
1266
1267 /* call hw_free on the frontend */
1268 err = soc_pcm_hw_free(substream);
1269 if (err < 0)
1270 dev_err(fe->dev,"dpcm: hw_free FE %s failed\n",
1271 fe->dai_link->name);
1272
1273 /* only hw_params backends that are either sinks or sources
1274 * to this frontend DAI */
1275 err = dpcm_be_dai_hw_free(fe, stream);
1276
1277 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1278 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1279
1280 mutex_unlock(&fe->card->mutex);
1281 return 0;
1282}
1283
1284static int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1285{
1286 struct snd_soc_dpcm *dpcm;
1287 int ret;
1288
1289 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1290
1291 struct snd_soc_pcm_runtime *be = dpcm->be;
1292 struct snd_pcm_substream *be_substream =
1293 snd_soc_dpcm_get_substream(be, stream);
1294
1295 /* is this op for this BE ? */
1296 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1297 continue;
1298
1299 /* only allow hw_params() if no connected FEs are running */
1300 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1301 continue;
1302
1303 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1304 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1305 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1306 continue;
1307
1308 dev_dbg(be->dev, "dpcm: hw_params BE %s\n",
1309 dpcm->fe->dai_link->name);
1310
1311 /* copy params for each dpcm */
1312 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1313 sizeof(struct snd_pcm_hw_params));
1314
1315 /* perform any hw_params fixups */
1316 if (be->dai_link->be_hw_params_fixup) {
1317 ret = be->dai_link->be_hw_params_fixup(be,
1318 &dpcm->hw_params);
1319 if (ret < 0) {
1320 dev_err(be->dev,
1321 "dpcm: hw_params BE fixup failed %d\n",
1322 ret);
1323 goto unwind;
1324 }
1325 }
1326
1327 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1328 if (ret < 0) {
1329 dev_err(dpcm->be->dev,
1330 "dpcm: hw_params BE failed %d\n", ret);
1331 goto unwind;
1332 }
1333
1334 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1335 }
1336 return 0;
1337
1338unwind:
1339 /* disable any enabled and non active backends */
1340 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1341 struct snd_soc_pcm_runtime *be = dpcm->be;
1342 struct snd_pcm_substream *be_substream =
1343 snd_soc_dpcm_get_substream(be, stream);
1344
1345 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1346 continue;
1347
1348 /* only allow hw_free() if no connected FEs are running */
1349 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1350 continue;
1351
1352 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1353 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1354 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1355 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1356 continue;
1357
1358 soc_pcm_hw_free(be_substream);
1359 }
1360
1361 return ret;
1362}
1363
1364static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1365 struct snd_pcm_hw_params *params)
1366{
1367 struct snd_soc_pcm_runtime *fe = substream->private_data;
1368 int ret, stream = substream->stream;
1369
1370 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1371 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1372
1373 memcpy(&fe->dpcm[substream->stream].hw_params, params,
1374 sizeof(struct snd_pcm_hw_params));
1375 ret = dpcm_be_dai_hw_params(fe, substream->stream);
1376 if (ret < 0) {
1377 dev_err(fe->dev,"dpcm: hw_params BE failed %d\n", ret);
1378 goto out;
1379 }
1380
1381 dev_dbg(fe->dev, "dpcm: hw_params FE %s rate %d chan %x fmt %d\n",
1382 fe->dai_link->name, params_rate(params),
1383 params_channels(params), params_format(params));
1384
1385 /* call hw_params on the frontend */
1386 ret = soc_pcm_hw_params(substream, params);
1387 if (ret < 0) {
1388 dev_err(fe->dev,"dpcm: hw_params FE failed %d\n", ret);
1389 dpcm_be_dai_hw_free(fe, stream);
1390 } else
1391 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1392
1393out:
1394 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1395 mutex_unlock(&fe->card->mutex);
1396 return ret;
1397}
1398
1399static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
1400 struct snd_pcm_substream *substream, int cmd)
1401{
1402 int ret;
1403
1404 dev_dbg(dpcm->be->dev, "dpcm: trigger BE %s cmd %d\n",
1405 dpcm->fe->dai_link->name, cmd);
1406
1407 ret = soc_pcm_trigger(substream, cmd);
1408 if (ret < 0)
1409 dev_err(dpcm->be->dev,"dpcm: trigger BE failed %d\n", ret);
1410
1411 return ret;
1412}
1413
1414static int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
1415 int cmd)
1416{
1417 struct snd_soc_dpcm *dpcm;
1418 int ret = 0;
1419
1420 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1421
1422 struct snd_soc_pcm_runtime *be = dpcm->be;
1423 struct snd_pcm_substream *be_substream =
1424 snd_soc_dpcm_get_substream(be, stream);
1425
1426 /* is this op for this BE ? */
1427 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1428 continue;
1429
1430 switch (cmd) {
1431 case SNDRV_PCM_TRIGGER_START:
1432 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1433 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1434 continue;
1435
1436 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1437 if (ret)
1438 return ret;
1439
1440 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1441 break;
1442 case SNDRV_PCM_TRIGGER_RESUME:
1443 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1444 continue;
1445
1446 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1447 if (ret)
1448 return ret;
1449
1450 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1451 break;
1452 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1453 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
1454 continue;
1455
1456 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1457 if (ret)
1458 return ret;
1459
1460 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1461 break;
1462 case SNDRV_PCM_TRIGGER_STOP:
1463 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1464 continue;
1465
1466 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1467 continue;
1468
1469 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1470 if (ret)
1471 return ret;
1472
1473 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1474 break;
1475 case SNDRV_PCM_TRIGGER_SUSPEND:
1476 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)
1477 continue;
1478
1479 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1480 continue;
1481
1482 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1483 if (ret)
1484 return ret;
1485
1486 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
1487 break;
1488 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1489 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1490 continue;
1491
1492 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1493 continue;
1494
1495 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1496 if (ret)
1497 return ret;
1498
1499 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
1500 break;
1501 }
1502 }
1503
1504 return ret;
1505}
1506EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
1507
1508static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
1509{
1510 struct snd_soc_pcm_runtime *fe = substream->private_data;
1511 int stream = substream->stream, ret;
1512 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1513
1514 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1515
1516 switch (trigger) {
1517 case SND_SOC_DPCM_TRIGGER_PRE:
1518 /* call trigger on the frontend before the backend. */
1519
1520 dev_dbg(fe->dev, "dpcm: pre trigger FE %s cmd %d\n",
1521 fe->dai_link->name, cmd);
1522
1523 ret = soc_pcm_trigger(substream, cmd);
1524 if (ret < 0) {
1525 dev_err(fe->dev,"dpcm: trigger FE failed %d\n", ret);
1526 goto out;
1527 }
1528
1529 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1530 break;
1531 case SND_SOC_DPCM_TRIGGER_POST:
1532 /* call trigger on the frontend after the backend. */
1533
1534 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1535 if (ret < 0) {
1536 dev_err(fe->dev,"dpcm: trigger FE failed %d\n", ret);
1537 goto out;
1538 }
1539
1540 dev_dbg(fe->dev, "dpcm: post trigger FE %s cmd %d\n",
1541 fe->dai_link->name, cmd);
1542
1543 ret = soc_pcm_trigger(substream, cmd);
1544 break;
1545 case SND_SOC_DPCM_TRIGGER_BESPOKE:
1546 /* bespoke trigger() - handles both FE and BEs */
1547
1548 dev_dbg(fe->dev, "dpcm: bespoke trigger FE %s cmd %d\n",
1549 fe->dai_link->name, cmd);
1550
1551 ret = soc_pcm_bespoke_trigger(substream, cmd);
1552 if (ret < 0) {
1553 dev_err(fe->dev,"dpcm: trigger FE failed %d\n", ret);
1554 goto out;
1555 }
1556 break;
1557 default:
1558 dev_err(fe->dev, "dpcm: invalid trigger cmd %d for %s\n", cmd,
1559 fe->dai_link->name);
1560 ret = -EINVAL;
1561 goto out;
1562 }
1563
1564 switch (cmd) {
1565 case SNDRV_PCM_TRIGGER_START:
1566 case SNDRV_PCM_TRIGGER_RESUME:
1567 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1568 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1569 break;
1570 case SNDRV_PCM_TRIGGER_STOP:
1571 case SNDRV_PCM_TRIGGER_SUSPEND:
1572 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1573 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1574 break;
1575 }
1576
1577out:
1578 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1579 return ret;
1580}
1581
1582static int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
1583{
1584 struct snd_soc_dpcm *dpcm;
1585 int ret = 0;
1586
1587 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1588
1589 struct snd_soc_pcm_runtime *be = dpcm->be;
1590 struct snd_pcm_substream *be_substream =
1591 snd_soc_dpcm_get_substream(be, stream);
1592
1593 /* is this op for this BE ? */
1594 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1595 continue;
1596
1597 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1598 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1599 continue;
1600
1601 dev_dbg(be->dev, "dpcm: prepare BE %s\n",
1602 dpcm->fe->dai_link->name);
1603
1604 ret = soc_pcm_prepare(be_substream);
1605 if (ret < 0) {
1606 dev_err(be->dev, "dpcm: backend prepare failed %d\n",
1607 ret);
1608 break;
1609 }
1610
1611 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
1612 }
1613 return ret;
1614}
1615
1616static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
1617{
1618 struct snd_soc_pcm_runtime *fe = substream->private_data;
1619 int stream = substream->stream, ret = 0;
1620
1621 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1622
1623 dev_dbg(fe->dev, "dpcm: prepare FE %s\n", fe->dai_link->name);
1624
1625 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1626
1627 /* there is no point preparing this FE if there are no BEs */
1628 if (list_empty(&fe->dpcm[stream].be_clients)) {
1629 dev_err(fe->dev, "dpcm: no backend DAIs enabled for %s\n",
1630 fe->dai_link->name);
1631 ret = -EINVAL;
1632 goto out;
1633 }
1634
1635 ret = dpcm_be_dai_prepare(fe, substream->stream);
1636 if (ret < 0)
1637 goto out;
1638
1639 /* call prepare on the frontend */
1640 ret = soc_pcm_prepare(substream);
1641 if (ret < 0) {
1642 dev_err(fe->dev,"dpcm: prepare FE %s failed\n",
1643 fe->dai_link->name);
1644 goto out;
1645 }
1646
1647 /* run the stream event for each BE */
1648 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
1649 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
1650
1651out:
1652 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1653 mutex_unlock(&fe->card->mutex);
1654
1655 return ret;
1656}
1657
1658static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
1659 unsigned int cmd, void *arg)
1660{
1661 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1662 struct snd_soc_platform *platform = rtd->platform;
1663
1664 if (platform->driver->ops->ioctl)
1665 return platform->driver->ops->ioctl(substream, cmd, arg);
1666 return snd_pcm_lib_ioctl(substream, cmd, arg);
1667}
1668
1669static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1670{
1671 struct snd_pcm_substream *substream =
1672 snd_soc_dpcm_get_substream(fe, stream);
1673 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1674 int err;
1675
1676 dev_dbg(fe->dev, "runtime %s close on FE %s\n",
1677 stream ? "capture" : "playback", fe->dai_link->name);
1678
1679 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
1680 /* call bespoke trigger - FE takes care of all BE triggers */
1681 dev_dbg(fe->dev, "dpcm: bespoke trigger FE %s cmd stop\n",
1682 fe->dai_link->name);
1683
1684 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1685 if (err < 0)
1686 dev_err(fe->dev,"dpcm: trigger FE failed %d\n", err);
1687 } else {
1688 dev_dbg(fe->dev, "dpcm: trigger FE %s cmd stop\n",
1689 fe->dai_link->name);
1690
1691 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
1692 if (err < 0)
1693 dev_err(fe->dev,"dpcm: trigger FE failed %d\n", err);
1694 }
1695
1696 err = dpcm_be_dai_hw_free(fe, stream);
1697 if (err < 0)
1698 dev_err(fe->dev,"dpcm: hw_free FE failed %d\n", err);
1699
1700 err = dpcm_be_dai_shutdown(fe, stream);
1701 if (err < 0)
1702 dev_err(fe->dev,"dpcm: shutdown FE failed %d\n", err);
1703
1704 /* run the stream event for each BE */
1705 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
1706
1707 return 0;
1708}
1709
1710static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
1711{
1712 struct snd_pcm_substream *substream =
1713 snd_soc_dpcm_get_substream(fe, stream);
1714 struct snd_soc_dpcm *dpcm;
1715 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1716 int ret;
1717
1718 dev_dbg(fe->dev, "runtime %s open on FE %s\n",
1719 stream ? "capture" : "playback", fe->dai_link->name);
1720
1721 /* Only start the BE if the FE is ready */
1722 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
1723 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
1724 return -EINVAL;
1725
1726 /* startup must always be called for new BEs */
1727 ret = dpcm_be_dai_startup(fe, stream);
1728 if (ret < 0) {
1729 goto disconnect;
1730 return ret;
1731 }
1732
1733 /* keep going if FE state is > open */
1734 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
1735 return 0;
1736
1737 ret = dpcm_be_dai_hw_params(fe, stream);
1738 if (ret < 0) {
1739 goto close;
1740 return ret;
1741 }
1742
1743 /* keep going if FE state is > hw_params */
1744 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
1745 return 0;
1746
1747
1748 ret = dpcm_be_dai_prepare(fe, stream);
1749 if (ret < 0) {
1750 goto hw_free;
1751 return ret;
1752 }
1753
1754 /* run the stream event for each BE */
1755 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
1756
1757 /* keep going if FE state is > prepare */
1758 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
1759 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
1760 return 0;
1761
1762 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
1763 /* call trigger on the frontend - FE takes care of all BE triggers */
1764 dev_dbg(fe->dev, "dpcm: bespoke trigger FE %s cmd start\n",
1765 fe->dai_link->name);
1766
1767 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
1768 if (ret < 0) {
1769 dev_err(fe->dev,"dpcm: bespoke trigger FE failed %d\n", ret);
1770 goto hw_free;
1771 }
1772 } else {
1773 dev_dbg(fe->dev, "dpcm: trigger FE %s cmd start\n",
1774 fe->dai_link->name);
1775
1776 ret = dpcm_be_dai_trigger(fe, stream,
1777 SNDRV_PCM_TRIGGER_START);
1778 if (ret < 0) {
1779 dev_err(fe->dev,"dpcm: trigger FE failed %d\n", ret);
1780 goto hw_free;
1781 }
1782 }
1783
1784 return 0;
1785
1786hw_free:
1787 dpcm_be_dai_hw_free(fe, stream);
1788close:
1789 dpcm_be_dai_shutdown(fe, stream);
1790disconnect:
1791 /* disconnect any non started BEs */
1792 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1793 struct snd_soc_pcm_runtime *be = dpcm->be;
1794 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1795 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1796 }
1797
1798 return ret;
1799}
1800
1801static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
1802{
1803 int ret;
1804
1805 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1806 ret = dpcm_run_update_startup(fe, stream);
1807 if (ret < 0)
1808 dev_err(fe->dev, "failed to startup some BEs\n");
1809 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1810
1811 return ret;
1812}
1813
1814static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
1815{
1816 int ret;
1817
1818 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1819 ret = dpcm_run_update_shutdown(fe, stream);
1820 if (ret < 0)
1821 dev_err(fe->dev, "failed to shutdown some BEs\n");
1822 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1823
1824 return ret;
1825}
1826
1827/* Called by DAPM mixer/mux changes to update audio routing between PCMs and
1828 * any DAI links.
1829 */
1830int soc_dpcm_runtime_update(struct snd_soc_dapm_widget *widget)
1831{
1832 struct snd_soc_card *card;
1833 int i, old, new, paths;
1834
1835 if (widget->codec)
1836 card = widget->codec->card;
1837 else if (widget->platform)
1838 card = widget->platform->card;
1839 else
1840 return -EINVAL;
1841
1842 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1843 for (i = 0; i < card->num_rtd; i++) {
1844 struct snd_soc_dapm_widget_list *list;
1845 struct snd_soc_pcm_runtime *fe = &card->rtd[i];
1846
1847 /* make sure link is FE */
1848 if (!fe->dai_link->dynamic)
1849 continue;
1850
1851 /* only check active links */
1852 if (!fe->cpu_dai->active)
1853 continue;
1854
1855 /* DAPM sync will call this to update DSP paths */
1856 dev_dbg(fe->dev, "DPCM runtime update for FE %s\n",
1857 fe->dai_link->name);
1858
1859 /* skip if FE doesn't have playback capability */
1860 if (!fe->cpu_dai->driver->playback.channels_min)
1861 goto capture;
1862
1863 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
1864 if (paths < 0) {
1865 dev_warn(fe->dev, "%s no valid %s path\n",
1866 fe->dai_link->name, "playback");
1867 mutex_unlock(&card->mutex);
1868 return paths;
1869 }
1870
1871 /* update any new playback paths */
1872 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
1873 if (new) {
1874 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
1875 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
1876 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
1877 }
1878
1879 /* update any old playback paths */
1880 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
1881 if (old) {
1882 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
1883 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
1884 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
1885 }
1886
1887capture:
1888 /* skip if FE doesn't have capture capability */
1889 if (!fe->cpu_dai->driver->capture.channels_min)
1890 continue;
1891
1892 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
1893 if (paths < 0) {
1894 dev_warn(fe->dev, "%s no valid %s path\n",
1895 fe->dai_link->name, "capture");
1896 mutex_unlock(&card->mutex);
1897 return paths;
1898 }
1899
1900 /* update any new capture paths */
1901 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
1902 if (new) {
1903 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
1904 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
1905 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
1906 }
1907
1908 /* update any old capture paths */
1909 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
1910 if (old) {
1911 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
1912 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
1913 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
1914 }
1915
1916 dpcm_path_put(&list);
1917 }
1918
1919 mutex_unlock(&card->mutex);
1920 return 0;
1921}
1922int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
1923{
1924 struct snd_soc_dpcm *dpcm;
1925 struct list_head *clients =
1926 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
1927
1928 list_for_each_entry(dpcm, clients, list_be) {
1929
1930 struct snd_soc_pcm_runtime *be = dpcm->be;
1931 struct snd_soc_dai *dai = be->codec_dai;
1932 struct snd_soc_dai_driver *drv = dai->driver;
1933
1934 if (be->dai_link->ignore_suspend)
1935 continue;
1936
1937 dev_dbg(be->dev, "BE digital mute %s\n", be->dai_link->name);
1938
1939 if (drv->ops->digital_mute && dai->playback_active)
1940 drv->ops->digital_mute(dai, mute);
1941 }
1942
1943 return 0;
1944}
1945
1946static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
1947{
1948 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1949 struct snd_soc_dpcm *dpcm;
1950 struct snd_soc_dapm_widget_list *list;
1951 int ret;
1952 int stream = fe_substream->stream;
1953
1954 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1955 fe->dpcm[stream].runtime = fe_substream->runtime;
1956
1957 if (dpcm_path_get(fe, stream, &list) <= 0) {
1958 dev_warn(fe->dev, "asoc: %s no valid %s route\n",
1959 fe->dai_link->name, stream ? "capture" : "playback");
1960 mutex_unlock(&fe->card->mutex);
1961 return -EINVAL;
1962 }
1963
1964 /* calculate valid and active FE <-> BE dpcms */
1965 dpcm_process_paths(fe, stream, &list, 1);
1966
1967 ret = dpcm_fe_dai_startup(fe_substream);
1968 if (ret < 0) {
1969 /* clean up all links */
1970 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1971 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1972
1973 dpcm_be_disconnect(fe, stream);
1974 fe->dpcm[stream].runtime = NULL;
1975 }
1976
1977 dpcm_clear_pending_state(fe, stream);
1978 dpcm_path_put(&list);
1979 mutex_unlock(&fe->card->mutex);
1980 return ret;
1981}
1982
1983static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
1984{
1985 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1986 struct snd_soc_dpcm *dpcm;
1987 int stream = fe_substream->stream, ret;
1988
1989 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1990 ret = dpcm_fe_dai_shutdown(fe_substream);
1991
1992 /* mark FE's links ready to prune */
1993 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1994 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1995
1996 dpcm_be_disconnect(fe, stream);
1997
1998 fe->dpcm[stream].runtime = NULL;
1999 mutex_unlock(&fe->card->mutex);
2000 return ret;
2001}
2002
2003/* create a new pcm */
2004int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2005{
2006 struct snd_soc_codec *codec = rtd->codec;
2007 struct snd_soc_platform *platform = rtd->platform;
2008 struct snd_soc_dai *codec_dai = rtd->codec_dai;
2009 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2010 struct snd_pcm *pcm;
2011 char new_name[64];
2012 int ret = 0, playback = 0, capture = 0;
2013
2014 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2015 if (cpu_dai->driver->playback.channels_min)
2016 playback = 1;
2017 if (cpu_dai->driver->capture.channels_min)
2018 capture = 1;
2019 } else {
2020 if (codec_dai->driver->playback.channels_min)
2021 playback = 1;
2022 if (codec_dai->driver->capture.channels_min)
2023 capture = 1;
2024 }
2025
2026 /* create the PCM */
2027 if (rtd->dai_link->no_pcm) {
2028 snprintf(new_name, sizeof(new_name), "(%s)",
2029 rtd->dai_link->stream_name);
2030
2031 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2032 playback, capture, &pcm);
2033 } else {
2034 if (rtd->dai_link->dynamic)
2035 snprintf(new_name, sizeof(new_name), "%s (*)",
2036 rtd->dai_link->stream_name);
2037 else
2038 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2039 rtd->dai_link->stream_name, codec_dai->name, num);
2040
2041 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2042 capture, &pcm);
2043 }
2044 if (ret < 0) {
2045 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
2046 return ret;
2047 }
2048 dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num, new_name);
2049
2050 /* DAPM dai link stream work */
2051 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2052
2053 rtd->pcm = pcm;
2054 pcm->private_data = rtd;
2055
2056 if (rtd->dai_link->no_pcm) {
2057 if (playback)
2058 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2059 if (capture)
2060 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2061 goto out;
2062 }
2063
2064 /* ASoC PCM operations */
2065 if (rtd->dai_link->dynamic) {
2066 rtd->ops.open = dpcm_fe_dai_open;
2067 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2068 rtd->ops.prepare = dpcm_fe_dai_prepare;
2069 rtd->ops.trigger = dpcm_fe_dai_trigger;
2070 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2071 rtd->ops.close = dpcm_fe_dai_close;
2072 rtd->ops.pointer = soc_pcm_pointer;
2073 rtd->ops.ioctl = soc_pcm_ioctl;
2074 } else {
2075 rtd->ops.open = soc_pcm_open;
2076 rtd->ops.hw_params = soc_pcm_hw_params;
2077 rtd->ops.prepare = soc_pcm_prepare;
2078 rtd->ops.trigger = soc_pcm_trigger;
2079 rtd->ops.hw_free = soc_pcm_hw_free;
2080 rtd->ops.close = soc_pcm_close;
2081 rtd->ops.pointer = soc_pcm_pointer;
2082 rtd->ops.ioctl = soc_pcm_ioctl;
2083 }
2084
2085 if (platform->driver->ops) {
2086 rtd->ops.ack = platform->driver->ops->ack;
2087 rtd->ops.copy = platform->driver->ops->copy;
2088 rtd->ops.silence = platform->driver->ops->silence;
2089 rtd->ops.page = platform->driver->ops->page;
2090 rtd->ops.mmap = platform->driver->ops->mmap;
2091 }
2092
2093 if (playback)
2094 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2095
2096 if (capture)
2097 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2098
2099 if (platform->driver->pcm_new) {
2100 ret = platform->driver->pcm_new(rtd);
2101 if (ret < 0) {
2102 pr_err("asoc: platform pcm constructor failed\n");
2103 return ret;
2104 }
2105 }
2106
2107 pcm->private_free = platform->driver->pcm_free;
2108out:
2109 printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
2110 cpu_dai->name);
2111 return ret;
2112}
2113
2114/* is the current PCM operation for this FE ? */
2115int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2116{
2117 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2118 return 1;
2119 return 0;
2120}
2121EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2122
2123/* is the current PCM operation for this BE ? */
2124int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2125 struct snd_soc_pcm_runtime *be, int stream)
2126{
2127 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2128 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2129 be->dpcm[stream].runtime_update))
2130 return 1;
2131 return 0;
2132}
2133EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2134
2135/* get the substream for this BE */
2136struct snd_pcm_substream *
2137 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2138{
2139 return be->pcm->streams[stream].substream;
2140}
2141EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2142
2143/* get the BE runtime state */
2144enum snd_soc_dpcm_state
2145 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2146{
2147 return be->dpcm[stream].state;
2148}
2149EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
2150
2151/* set the BE runtime state */
2152void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
2153 int stream, enum snd_soc_dpcm_state state)
2154{
2155 be->dpcm[stream].state = state;
2156}
2157EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
2158
2159/*
2160 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2161 * are not running, paused or suspended for the specified stream direction.
2162 */
2163int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2164 struct snd_soc_pcm_runtime *be, int stream)
2165{
2166 struct snd_soc_dpcm *dpcm;
2167 int state;
2168
2169 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2170
2171 if (dpcm->fe == fe)
2172 continue;
2173
2174 state = dpcm->fe->dpcm[stream].state;
2175 if (state == SND_SOC_DPCM_STATE_START ||
2176 state == SND_SOC_DPCM_STATE_PAUSED ||
2177 state == SND_SOC_DPCM_STATE_SUSPEND)
2178 return 0;
2179 }
2180
2181 /* it's safe to free/stop this BE DAI */
2182 return 1;
2183}
2184EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2185
2186/*
2187 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2188 * running, paused or suspended for the specified stream direction.
2189 */
2190int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2191 struct snd_soc_pcm_runtime *be, int stream)
2192{
2193 struct snd_soc_dpcm *dpcm;
2194 int state;
2195
2196 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2197
2198 if (dpcm->fe == fe)
2199 continue;
2200
2201 state = dpcm->fe->dpcm[stream].state;
2202 if (state == SND_SOC_DPCM_STATE_START ||
2203 state == SND_SOC_DPCM_STATE_PAUSED ||
2204 state == SND_SOC_DPCM_STATE_SUSPEND ||
2205 state == SND_SOC_DPCM_STATE_PREPARE)
2206 return 0;
2207 }
2208
2209 /* it's safe to change hw_params */
2210 return 1;
2211}
2212EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2213
2214int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
2215 int cmd, struct snd_soc_platform *platform)
2216{
2217 if (platform->driver->ops->trigger)
2218 return platform->driver->ops->trigger(substream, cmd);
2219 return 0;
2220}
2221EXPORT_SYMBOL_GPL(snd_soc_platform_trigger);
2222
2223#ifdef CONFIG_DEBUG_FS
2224static char *dpcm_state_string(enum snd_soc_dpcm_state state)
2225{
2226 switch (state) {
2227 case SND_SOC_DPCM_STATE_NEW:
2228 return "new";
2229 case SND_SOC_DPCM_STATE_OPEN:
2230 return "open";
2231 case SND_SOC_DPCM_STATE_HW_PARAMS:
2232 return "hw_params";
2233 case SND_SOC_DPCM_STATE_PREPARE:
2234 return "prepare";
2235 case SND_SOC_DPCM_STATE_START:
2236 return "start";
2237 case SND_SOC_DPCM_STATE_STOP:
2238 return "stop";
2239 case SND_SOC_DPCM_STATE_SUSPEND:
2240 return "suspend";
2241 case SND_SOC_DPCM_STATE_PAUSED:
2242 return "paused";
2243 case SND_SOC_DPCM_STATE_HW_FREE:
2244 return "hw_free";
2245 case SND_SOC_DPCM_STATE_CLOSE:
2246 return "close";
2247 }
2248
2249 return "unknown";
2250}
2251
2252static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2253 int stream, char *buf, size_t size)
2254{
2255 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2256 struct snd_soc_dpcm *dpcm;
2257 ssize_t offset = 0;
2258
2259 /* FE state */
2260 offset += snprintf(buf + offset, size - offset,
2261 "[%s - %s]\n", fe->dai_link->name,
2262 stream ? "Capture" : "Playback");
2263
2264 offset += snprintf(buf + offset, size - offset, "State: %s\n",
2265 dpcm_state_string(fe->dpcm[stream].state));
2266
2267 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2268 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2269 offset += snprintf(buf + offset, size - offset,
2270 "Hardware Params: "
2271 "Format = %s, Channels = %d, Rate = %d\n",
2272 snd_pcm_format_name(params_format(params)),
2273 params_channels(params),
2274 params_rate(params));
2275
2276 /* BEs state */
2277 offset += snprintf(buf + offset, size - offset, "Backends:\n");
2278
2279 if (list_empty(&fe->dpcm[stream].be_clients)) {
2280 offset += snprintf(buf + offset, size - offset,
2281 " No active DSP links\n");
2282 goto out;
2283 }
2284
2285 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2286 struct snd_soc_pcm_runtime *be = dpcm->be;
2287 params = &dpcm->hw_params;
2288
2289 offset += snprintf(buf + offset, size - offset,
2290 "- %s\n", be->dai_link->name);
2291
2292 offset += snprintf(buf + offset, size - offset,
2293 " State: %s\n",
2294 dpcm_state_string(be->dpcm[stream].state));
2295
2296 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2297 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2298 offset += snprintf(buf + offset, size - offset,
2299 " Hardware Params: "
2300 "Format = %s, Channels = %d, Rate = %d\n",
2301 snd_pcm_format_name(params_format(params)),
2302 params_channels(params),
2303 params_rate(params));
2304 }
2305
2306out:
2307 return offset;
2308}
2309
2310static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
2311 size_t count, loff_t *ppos)
2312{
2313 struct snd_soc_pcm_runtime *fe = file->private_data;
2314 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
2315 char *buf;
2316
2317 buf = kmalloc(out_count, GFP_KERNEL);
2318 if (!buf)
2319 return -ENOMEM;
2320
2321 if (fe->cpu_dai->driver->playback.channels_min)
2322 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
2323 buf + offset, out_count - offset);
2324
2325 if (fe->cpu_dai->driver->capture.channels_min)
2326 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
2327 buf + offset, out_count - offset);
2328
2329 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
2330
2331 kfree(buf);
2332 return ret;
2333}
2334
2335static const struct file_operations dpcm_state_fops = {
2336 .open = simple_open,
2337 .read = dpcm_state_read_file,
2338 .llseek = default_llseek,
2339};
2340
2341int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
2342{
2343 if (!rtd->dai_link)
2344 return 0;
2345
2346 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
2347 rtd->card->debugfs_card_root);
2348 if (!rtd->debugfs_dpcm_root) {
2349 dev_dbg(rtd->dev,
2350 "ASoC: Failed to create dpcm debugfs directory %s\n",
2351 rtd->dai_link->name);
2352 return -EINVAL;
2353 }
2354
2355 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
2356 rtd->debugfs_dpcm_root,
2357 rtd, &dpcm_state_fops);
2358
2359 return 0;
2360}
2361#endif