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disable some mediatekl custom warnings
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / soc / soc-pcm.c
1 /*
2 * soc-pcm.c -- ALSA SoC PCM
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Authors: Liam Girdwood <lrg@ti.com>
10 * Mark Brown <broonie@opensource.wolfsonmicro.com>
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 *
17 */
18
19 #include <linux/kernel.h>
20 #include <linux/init.h>
21 #include <linux/delay.h>
22 #include <linux/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. */
37 static 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, "ASoC: 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
57 static 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 "ASoC: Not enforcing symmetric_rates due to race\n");
74 return 0;
75 }
76
77 dev_dbg(soc_dai->dev, "ASoC: 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 "ASoC: Unable to apply rate symmetry constraint: %d\n",
85 ret);
86 return ret;
87 }
88
89 return 0;
90 }
91
92 /*
93 * List of sample sizes that might go over the bus for parameter
94 * application. There ought to be a wildcard sample size for things
95 * like the DAC/ADC resolution to use but there isn't right now.
96 */
97 static int sample_sizes[] = {
98 24, 32,
99 };
100
101 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream,
102 struct snd_soc_dai *dai)
103 {
104 int ret, i, bits;
105
106 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
107 bits = dai->driver->playback.sig_bits;
108 else
109 bits = dai->driver->capture.sig_bits;
110
111 if (!bits)
112 return;
113
114 for (i = 0; i < ARRAY_SIZE(sample_sizes); i++) {
115 if (bits >= sample_sizes[i])
116 continue;
117
118 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0,
119 sample_sizes[i], bits);
120 if (ret != 0)
121 dev_warn(dai->dev,
122 "ASoC: Failed to set MSB %d/%d: %d\n",
123 bits, sample_sizes[i], ret);
124 }
125 }
126
127 /*
128 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
129 * then initialized and any private data can be allocated. This also calls
130 * startup for the cpu DAI, platform, machine and codec DAI.
131 */
132 static int soc_pcm_open(struct snd_pcm_substream *substream)
133 {
134 struct snd_soc_pcm_runtime *rtd = substream->private_data;
135 struct snd_pcm_runtime *runtime = substream->runtime;
136 struct snd_soc_platform *platform = rtd->platform;
137 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
138 struct snd_soc_dai *codec_dai = rtd->codec_dai;
139 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
140 struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
141 int ret = 0;
142
143 pm_runtime_get_sync(cpu_dai->dev);
144 pm_runtime_get_sync(codec_dai->dev);
145 pm_runtime_get_sync(platform->dev);
146
147 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
148
149 /* startup the audio subsystem */
150 if (cpu_dai->driver->ops->startup) {
151 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
152 if (ret < 0) {
153 dev_err(cpu_dai->dev, "ASoC: can't open interface"
154 " %s: %d\n", cpu_dai->name, ret);
155 goto out;
156 }
157 }
158
159 if (platform->driver->ops && platform->driver->ops->open) {
160 ret = platform->driver->ops->open(substream);
161 if (ret < 0) {
162 dev_err(platform->dev, "ASoC: can't open platform"
163 " %s: %d\n", platform->name, ret);
164 goto platform_err;
165 }
166 }
167
168 if (codec_dai->driver->ops->startup) {
169 ret = codec_dai->driver->ops->startup(substream, codec_dai);
170 if (ret < 0) {
171 dev_err(codec_dai->dev, "ASoC: can't open codec"
172 " %s: %d\n", codec_dai->name, ret);
173 goto codec_dai_err;
174 }
175 }
176
177 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
178 ret = rtd->dai_link->ops->startup(substream);
179 if (ret < 0) {
180 pr_err("ASoC: %s startup failed: %d\n",
181 rtd->dai_link->name, ret);
182 goto machine_err;
183 }
184 }
185
186 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
187 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
188 goto dynamic;
189
190 /* Check that the codec and cpu DAIs are compatible */
191 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
192 runtime->hw.rate_min =
193 max(codec_dai_drv->playback.rate_min,
194 cpu_dai_drv->playback.rate_min);
195 runtime->hw.rate_max =
196 min(codec_dai_drv->playback.rate_max,
197 cpu_dai_drv->playback.rate_max);
198 runtime->hw.channels_min =
199 max(codec_dai_drv->playback.channels_min,
200 cpu_dai_drv->playback.channels_min);
201 runtime->hw.channels_max =
202 min(codec_dai_drv->playback.channels_max,
203 cpu_dai_drv->playback.channels_max);
204 runtime->hw.formats =
205 codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
206 runtime->hw.rates =
207 codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
208 if (codec_dai_drv->playback.rates
209 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
210 runtime->hw.rates |= cpu_dai_drv->playback.rates;
211 if (cpu_dai_drv->playback.rates
212 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
213 runtime->hw.rates |= codec_dai_drv->playback.rates;
214 } else {
215 runtime->hw.rate_min =
216 max(codec_dai_drv->capture.rate_min,
217 cpu_dai_drv->capture.rate_min);
218 runtime->hw.rate_max =
219 min(codec_dai_drv->capture.rate_max,
220 cpu_dai_drv->capture.rate_max);
221 runtime->hw.channels_min =
222 max(codec_dai_drv->capture.channels_min,
223 cpu_dai_drv->capture.channels_min);
224 runtime->hw.channels_max =
225 min(codec_dai_drv->capture.channels_max,
226 cpu_dai_drv->capture.channels_max);
227 runtime->hw.formats =
228 codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
229 runtime->hw.rates =
230 codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
231 if (codec_dai_drv->capture.rates
232 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
233 runtime->hw.rates |= cpu_dai_drv->capture.rates;
234 if (cpu_dai_drv->capture.rates
235 & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
236 runtime->hw.rates |= codec_dai_drv->capture.rates;
237 }
238
239 ret = -EINVAL;
240 snd_pcm_limit_hw_rates(runtime);
241 if (!runtime->hw.rates) {
242 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
243 codec_dai->name, cpu_dai->name);
244 goto config_err;
245 }
246 if (!runtime->hw.formats) {
247 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
248 codec_dai->name, cpu_dai->name);
249 goto config_err;
250 }
251 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
252 runtime->hw.channels_min > runtime->hw.channels_max) {
253 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
254 codec_dai->name, cpu_dai->name);
255 goto config_err;
256 }
257
258 soc_pcm_apply_msb(substream, codec_dai);
259 soc_pcm_apply_msb(substream, cpu_dai);
260
261 /* Symmetry only applies if we've already got an active stream. */
262 if (cpu_dai->active) {
263 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
264 if (ret != 0)
265 goto config_err;
266 }
267
268 if (codec_dai->active) {
269 ret = soc_pcm_apply_symmetry(substream, codec_dai);
270 if (ret != 0)
271 goto config_err;
272 }
273
274 pr_debug("ASoC: %s <-> %s info:\n",
275 codec_dai->name, cpu_dai->name);
276 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
277 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
278 runtime->hw.channels_max);
279 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
280 runtime->hw.rate_max);
281
282 dynamic:
283 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
284 cpu_dai->playback_active++;
285 codec_dai->playback_active++;
286 } else {
287 cpu_dai->capture_active++;
288 codec_dai->capture_active++;
289 }
290 cpu_dai->active++;
291 codec_dai->active++;
292 rtd->codec->active++;
293 mutex_unlock(&rtd->pcm_mutex);
294 return 0;
295
296 config_err:
297 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
298 rtd->dai_link->ops->shutdown(substream);
299
300 machine_err:
301 if (codec_dai->driver->ops->shutdown)
302 codec_dai->driver->ops->shutdown(substream, codec_dai);
303
304 codec_dai_err:
305 if (platform->driver->ops && platform->driver->ops->close)
306 platform->driver->ops->close(substream);
307
308 platform_err:
309 if (cpu_dai->driver->ops->shutdown)
310 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
311 out:
312 mutex_unlock(&rtd->pcm_mutex);
313
314 pm_runtime_put(platform->dev);
315 pm_runtime_put(codec_dai->dev);
316 pm_runtime_put(cpu_dai->dev);
317
318 return ret;
319 }
320
321 /*
322 * Power down the audio subsystem pmdown_time msecs after close is called.
323 * This is to ensure there are no pops or clicks in between any music tracks
324 * due to DAPM power cycling.
325 */
326 static void close_delayed_work(struct work_struct *work)
327 {
328 struct snd_soc_pcm_runtime *rtd =
329 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
330 struct snd_soc_dai *codec_dai = rtd->codec_dai;
331
332 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
333
334 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
335 codec_dai->driver->playback.stream_name,
336 codec_dai->playback_active ? "active" : "inactive",
337 rtd->pop_wait ? "yes" : "no");
338
339 /* are we waiting on this codec DAI stream */
340 if (rtd->pop_wait == 1) {
341 rtd->pop_wait = 0;
342 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
343 SND_SOC_DAPM_STREAM_STOP);
344 }
345
346 mutex_unlock(&rtd->pcm_mutex);
347 }
348
349 /*
350 * Called by ALSA when a PCM substream is closed. Private data can be
351 * freed here. The cpu DAI, codec DAI, machine and platform are also
352 * shutdown.
353 */
354 static int soc_pcm_close(struct snd_pcm_substream *substream)
355 {
356 struct snd_soc_pcm_runtime *rtd = substream->private_data;
357 struct snd_soc_platform *platform = rtd->platform;
358 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
359 struct snd_soc_dai *codec_dai = rtd->codec_dai;
360 struct snd_soc_codec *codec = rtd->codec;
361
362 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
363
364 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
365 cpu_dai->playback_active--;
366 codec_dai->playback_active--;
367 } else {
368 cpu_dai->capture_active--;
369 codec_dai->capture_active--;
370 }
371
372 cpu_dai->active--;
373 codec_dai->active--;
374 codec->active--;
375
376 /* clear the corresponding DAIs rate when inactive */
377 if (!cpu_dai->active)
378 cpu_dai->rate = 0;
379
380 if (!codec_dai->active)
381 codec_dai->rate = 0;
382
383 /* Muting the DAC suppresses artifacts caused during digital
384 * shutdown, for example from stopping clocks.
385 */
386 snd_soc_dai_digital_mute(codec_dai, 1, substream->stream);
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 rtd->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 */
434 static 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 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
448 " %d\n", ret);
449 goto out;
450 }
451 }
452
453 if (platform->driver->ops && platform->driver->ops->prepare) {
454 ret = platform->driver->ops->prepare(substream);
455 if (ret < 0) {
456 dev_err(platform->dev, "ASoC: platform prepare error:"
457 " %d\n", ret);
458 goto out;
459 }
460 }
461
462 if (codec_dai->driver->ops->prepare) {
463 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
464 if (ret < 0) {
465 dev_err(codec_dai->dev, "ASoC: DAI prepare error: %d\n",
466 ret);
467 goto out;
468 }
469 }
470
471 if (cpu_dai->driver->ops->prepare) {
472 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
473 if (ret < 0) {
474 dev_err(cpu_dai->dev, "ASoC: DAI prepare error: %d\n",
475 ret);
476 goto out;
477 }
478 }
479
480 /* cancel any delayed stream shutdown that is pending */
481 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
482 rtd->pop_wait) {
483 rtd->pop_wait = 0;
484 cancel_delayed_work(&rtd->delayed_work);
485 }
486
487 snd_soc_dapm_stream_event(rtd, substream->stream,
488 SND_SOC_DAPM_STREAM_START);
489
490 snd_soc_dai_digital_mute(codec_dai, 0, substream->stream);
491
492 out:
493 mutex_unlock(&rtd->pcm_mutex);
494 return ret;
495 }
496
497 /*
498 * Called by ALSA when the hardware params are set by application. This
499 * function can also be called multiple times and can allocate buffers
500 * (using snd_pcm_lib_* ). It's non-atomic.
501 */
502 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
503 struct snd_pcm_hw_params *params)
504 {
505 struct snd_soc_pcm_runtime *rtd = substream->private_data;
506 struct snd_soc_platform *platform = rtd->platform;
507 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
508 struct snd_soc_dai *codec_dai = rtd->codec_dai;
509 int ret = 0;
510
511 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
512
513 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
514 ret = rtd->dai_link->ops->hw_params(substream, params);
515 if (ret < 0) {
516 dev_err(rtd->card->dev, "ASoC: machine hw_params"
517 " failed: %d\n", ret);
518 goto out;
519 }
520 }
521
522 if (codec_dai->driver->ops->hw_params) {
523 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
524 if (ret < 0) {
525 dev_err(codec_dai->dev, "ASoC: can't set %s hw params:"
526 " %d\n", codec_dai->name, ret);
527 goto codec_err;
528 }
529 }
530
531 if (cpu_dai->driver->ops->hw_params) {
532 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
533 if (ret < 0) {
534 dev_err(cpu_dai->dev, "ASoC: %s hw params failed: %d\n",
535 cpu_dai->name, ret);
536 goto interface_err;
537 }
538 }
539
540 if (platform->driver->ops && platform->driver->ops->hw_params) {
541 ret = platform->driver->ops->hw_params(substream, params);
542 if (ret < 0) {
543 dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
544 platform->name, ret);
545 goto platform_err;
546 }
547 }
548
549 /* store the rate for each DAIs */
550 cpu_dai->rate = params_rate(params);
551 codec_dai->rate = params_rate(params);
552
553 out:
554 mutex_unlock(&rtd->pcm_mutex);
555 return ret;
556
557 platform_err:
558 if (cpu_dai->driver->ops->hw_free)
559 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
560
561 interface_err:
562 if (codec_dai->driver->ops->hw_free)
563 codec_dai->driver->ops->hw_free(substream, codec_dai);
564
565 codec_err:
566 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
567 rtd->dai_link->ops->hw_free(substream);
568
569 mutex_unlock(&rtd->pcm_mutex);
570 return ret;
571 }
572
573 /*
574 * Frees resources allocated by hw_params, can be called multiple times
575 */
576 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
577 {
578 struct snd_soc_pcm_runtime *rtd = substream->private_data;
579 struct snd_soc_platform *platform = rtd->platform;
580 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
581 struct snd_soc_dai *codec_dai = rtd->codec_dai;
582 struct snd_soc_codec *codec = rtd->codec;
583
584 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
585
586 /* apply codec digital mute */
587 if (!codec->active)
588 snd_soc_dai_digital_mute(codec_dai, 1, substream->stream);
589
590 /* free any machine hw params */
591 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
592 rtd->dai_link->ops->hw_free(substream);
593
594 /* free any DMA resources */
595 if (platform->driver->ops && platform->driver->ops->hw_free)
596 platform->driver->ops->hw_free(substream);
597
598 /* now free hw params for the DAIs */
599 if (codec_dai->driver->ops->hw_free)
600 codec_dai->driver->ops->hw_free(substream, codec_dai);
601
602 if (cpu_dai->driver->ops->hw_free)
603 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
604
605 mutex_unlock(&rtd->pcm_mutex);
606 return 0;
607 }
608
609 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
610 {
611 struct snd_soc_pcm_runtime *rtd = substream->private_data;
612 struct snd_soc_platform *platform = rtd->platform;
613 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
614 struct snd_soc_dai *codec_dai = rtd->codec_dai;
615 int ret;
616
617 if (codec_dai->driver->ops->trigger) {
618 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
619 if (ret < 0)
620 return ret;
621 }
622
623 if (platform->driver->ops && platform->driver->ops->trigger) {
624 ret = platform->driver->ops->trigger(substream, cmd);
625 if (ret < 0)
626 return ret;
627 }
628
629 if (cpu_dai->driver->ops->trigger) {
630 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
631 if (ret < 0)
632 return ret;
633 }
634 return 0;
635 }
636
637 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
638 int cmd)
639 {
640 struct snd_soc_pcm_runtime *rtd = substream->private_data;
641 struct snd_soc_platform *platform = rtd->platform;
642 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
643 struct snd_soc_dai *codec_dai = rtd->codec_dai;
644 int ret;
645
646 if (codec_dai->driver->ops->bespoke_trigger) {
647 ret = codec_dai->driver->ops->bespoke_trigger(substream, cmd, codec_dai);
648 if (ret < 0)
649 return ret;
650 }
651
652 if (platform->driver->bespoke_trigger) {
653 ret = platform->driver->bespoke_trigger(substream, cmd);
654 if (ret < 0)
655 return ret;
656 }
657
658 if (cpu_dai->driver->ops->bespoke_trigger) {
659 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
660 if (ret < 0)
661 return ret;
662 }
663 return 0;
664 }
665 /*
666 * soc level wrapper for pointer callback
667 * If cpu_dai, codec_dai, platform driver has the delay callback, than
668 * the runtime->delay will be updated accordingly.
669 */
670 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
671 {
672 struct snd_soc_pcm_runtime *rtd = substream->private_data;
673 struct snd_soc_platform *platform = rtd->platform;
674 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
675 struct snd_soc_dai *codec_dai = rtd->codec_dai;
676 struct snd_pcm_runtime *runtime = substream->runtime;
677 snd_pcm_uframes_t offset = 0;
678 snd_pcm_sframes_t delay = 0;
679
680 if (platform->driver->ops && platform->driver->ops->pointer)
681 offset = platform->driver->ops->pointer(substream);
682
683 if (cpu_dai->driver->ops->delay)
684 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
685
686 if (codec_dai->driver->ops->delay)
687 delay += codec_dai->driver->ops->delay(substream, codec_dai);
688
689 if (platform->driver->delay)
690 delay += platform->driver->delay(substream, codec_dai);
691
692 runtime->delay = delay;
693
694 return offset;
695 }
696
697 /* connect a FE and BE */
698 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
699 struct snd_soc_pcm_runtime *be, int stream)
700 {
701 struct snd_soc_dpcm *dpcm;
702
703 /* only add new dpcms */
704 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
705 if (dpcm->be == be && dpcm->fe == fe)
706 return 0;
707 }
708
709 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
710 if (!dpcm)
711 return -ENOMEM;
712
713 dpcm->be = be;
714 dpcm->fe = fe;
715 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
716 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
717 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
718 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
719
720 dev_dbg(fe->dev, " connected new DPCM %s path %s %s %s\n",
721 stream ? "capture" : "playback", fe->dai_link->name,
722 stream ? "<-" : "->", be->dai_link->name);
723
724 #ifdef CONFIG_DEBUG_FS
725 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
726 fe->debugfs_dpcm_root, &dpcm->state);
727 #endif
728 return 1;
729 }
730
731 /* reparent a BE onto another FE */
732 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
733 struct snd_soc_pcm_runtime *be, int stream)
734 {
735 struct snd_soc_dpcm *dpcm;
736 struct snd_pcm_substream *fe_substream, *be_substream;
737
738 /* reparent if BE is connected to other FEs */
739 if (!be->dpcm[stream].users)
740 return;
741
742 be_substream = snd_soc_dpcm_get_substream(be, stream);
743
744 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
745 if (dpcm->fe == fe)
746 continue;
747
748 dev_dbg(fe->dev, " reparent %s path %s %s %s\n",
749 stream ? "capture" : "playback",
750 dpcm->fe->dai_link->name,
751 stream ? "<-" : "->", dpcm->be->dai_link->name);
752
753 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
754 be_substream->runtime = fe_substream->runtime;
755 break;
756 }
757 }
758
759 /* disconnect a BE and FE */
760 static void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
761 {
762 struct snd_soc_dpcm *dpcm, *d;
763
764 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
765 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
766 stream ? "capture" : "playback",
767 dpcm->be->dai_link->name);
768
769 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
770 continue;
771
772 dev_dbg(fe->dev, " freed DSP %s path %s %s %s\n",
773 stream ? "capture" : "playback", fe->dai_link->name,
774 stream ? "<-" : "->", dpcm->be->dai_link->name);
775
776 /* BEs still alive need new FE */
777 dpcm_be_reparent(fe, dpcm->be, stream);
778
779 #ifdef CONFIG_DEBUG_FS
780 debugfs_remove(dpcm->debugfs_state);
781 #endif
782 list_del(&dpcm->list_be);
783 list_del(&dpcm->list_fe);
784 kfree(dpcm);
785 }
786 }
787
788 /* get BE for DAI widget and stream */
789 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
790 struct snd_soc_dapm_widget *widget, int stream)
791 {
792 struct snd_soc_pcm_runtime *be;
793 int i;
794
795 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
796 for (i = 0; i < card->num_links; i++) {
797 be = &card->rtd[i];
798
799 if (!be->dai_link->no_pcm)
800 continue;
801
802 if (be->cpu_dai->playback_widget == widget ||
803 be->codec_dai->playback_widget == widget)
804 return be;
805 }
806 } else {
807
808 for (i = 0; i < card->num_links; i++) {
809 be = &card->rtd[i];
810
811 if (!be->dai_link->no_pcm)
812 continue;
813
814 if (be->cpu_dai->capture_widget == widget ||
815 be->codec_dai->capture_widget == widget)
816 return be;
817 }
818 }
819
820 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
821 stream ? "capture" : "playback", widget->name);
822 return NULL;
823 }
824
825 static inline struct snd_soc_dapm_widget *
826 rtd_get_cpu_widget(struct snd_soc_pcm_runtime *rtd, int stream)
827 {
828 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
829 return rtd->cpu_dai->playback_widget;
830 else
831 return rtd->cpu_dai->capture_widget;
832 }
833
834 static inline struct snd_soc_dapm_widget *
835 rtd_get_codec_widget(struct snd_soc_pcm_runtime *rtd, int stream)
836 {
837 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
838 return rtd->codec_dai->playback_widget;
839 else
840 return rtd->codec_dai->capture_widget;
841 }
842
843 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
844 struct snd_soc_dapm_widget *widget)
845 {
846 int i;
847
848 for (i = 0; i < list->num_widgets; i++) {
849 if (widget == list->widgets[i])
850 return 1;
851 }
852
853 return 0;
854 }
855
856 static int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
857 int stream, struct snd_soc_dapm_widget_list **list_)
858 {
859 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
860 struct snd_soc_dapm_widget_list *list;
861 int paths;
862
863 list = kzalloc(sizeof(struct snd_soc_dapm_widget_list) +
864 sizeof(struct snd_soc_dapm_widget *), GFP_KERNEL);
865 if (list == NULL)
866 return -ENOMEM;
867
868 /* get number of valid DAI paths and their widgets */
869 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, &list);
870
871 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
872 stream ? "capture" : "playback");
873
874 *list_ = list;
875 return paths;
876 }
877
878 static inline void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
879 {
880 kfree(*list);
881 }
882
883 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
884 struct snd_soc_dapm_widget_list **list_)
885 {
886 struct snd_soc_dpcm *dpcm;
887 struct snd_soc_dapm_widget_list *list = *list_;
888 struct snd_soc_dapm_widget *widget;
889 int prune = 0;
890
891 /* Destroy any old FE <--> BE connections */
892 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
893
894 /* is there a valid CPU DAI widget for this BE */
895 widget = rtd_get_cpu_widget(dpcm->be, stream);
896
897 /* prune the BE if it's no longer in our active list */
898 if (widget && widget_in_list(list, widget))
899 continue;
900
901 /* is there a valid CODEC DAI widget for this BE */
902 widget = rtd_get_codec_widget(dpcm->be, stream);
903
904 /* prune the BE if it's no longer in our active list */
905 if (widget && widget_in_list(list, widget))
906 continue;
907
908 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
909 stream ? "capture" : "playback",
910 dpcm->be->dai_link->name, fe->dai_link->name);
911 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
912 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
913 prune++;
914 }
915
916 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
917 return prune;
918 }
919
920 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
921 struct snd_soc_dapm_widget_list **list_)
922 {
923 struct snd_soc_card *card = fe->card;
924 struct snd_soc_dapm_widget_list *list = *list_;
925 struct snd_soc_pcm_runtime *be;
926 int i, new = 0, err;
927
928 /* Create any new FE <--> BE connections */
929 for (i = 0; i < list->num_widgets; i++) {
930
931 switch (list->widgets[i]->id) {
932 case snd_soc_dapm_dai_in:
933 case snd_soc_dapm_dai_out:
934 break;
935 default:
936 continue;
937 }
938
939 /* is there a valid BE rtd for this widget */
940 be = dpcm_get_be(card, list->widgets[i], stream);
941 if (!be) {
942 dev_err(fe->dev, "ASoC: no BE found for %s\n",
943 list->widgets[i]->name);
944 continue;
945 }
946
947 /* make sure BE is a real BE */
948 if (!be->dai_link->no_pcm)
949 continue;
950
951 /* don't connect if FE is not running */
952 if (!fe->dpcm[stream].runtime)
953 continue;
954
955 /* newly connected FE and BE */
956 err = dpcm_be_connect(fe, be, stream);
957 if (err < 0) {
958 dev_err(fe->dev, "ASoC: can't connect %s\n",
959 list->widgets[i]->name);
960 break;
961 } else if (err == 0) /* already connected */
962 continue;
963
964 /* new */
965 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
966 new++;
967 }
968
969 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
970 return new;
971 }
972
973 /*
974 * Find the corresponding BE DAIs that source or sink audio to this
975 * FE substream.
976 */
977 static int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
978 int stream, struct snd_soc_dapm_widget_list **list, int new)
979 {
980 if (new)
981 return dpcm_add_paths(fe, stream, list);
982 else
983 return dpcm_prune_paths(fe, stream, list);
984 }
985
986 static void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
987 {
988 struct snd_soc_dpcm *dpcm;
989
990 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
991 dpcm->be->dpcm[stream].runtime_update =
992 SND_SOC_DPCM_UPDATE_NO;
993 }
994
995 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
996 int stream)
997 {
998 struct snd_soc_dpcm *dpcm;
999
1000 /* disable any enabled and non active backends */
1001 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1002
1003 struct snd_soc_pcm_runtime *be = dpcm->be;
1004 struct snd_pcm_substream *be_substream =
1005 snd_soc_dpcm_get_substream(be, stream);
1006
1007 if (be->dpcm[stream].users == 0)
1008 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1009 stream ? "capture" : "playback",
1010 be->dpcm[stream].state);
1011
1012 if (--be->dpcm[stream].users != 0)
1013 continue;
1014
1015 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1016 continue;
1017
1018 soc_pcm_close(be_substream);
1019 be_substream->runtime = NULL;
1020 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1021 }
1022 }
1023
1024 static int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1025 {
1026 struct snd_soc_dpcm *dpcm;
1027 int err, count = 0;
1028
1029 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1030 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1031
1032 struct snd_soc_pcm_runtime *be = dpcm->be;
1033 struct snd_pcm_substream *be_substream =
1034 snd_soc_dpcm_get_substream(be, stream);
1035
1036 /* is this op for this BE ? */
1037 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1038 continue;
1039
1040 /* first time the dpcm is open ? */
1041 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1042 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1043 stream ? "capture" : "playback",
1044 be->dpcm[stream].state);
1045
1046 if (be->dpcm[stream].users++ != 0)
1047 continue;
1048
1049 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1050 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1051 continue;
1052
1053 dev_dbg(be->dev, "ASoC: open BE %s\n", be->dai_link->name);
1054
1055 be_substream->runtime = be->dpcm[stream].runtime;
1056 err = soc_pcm_open(be_substream);
1057 if (err < 0) {
1058 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1059 be->dpcm[stream].users--;
1060 if (be->dpcm[stream].users < 0)
1061 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1062 stream ? "capture" : "playback",
1063 be->dpcm[stream].state);
1064
1065 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1066 goto unwind;
1067 }
1068
1069 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1070 count++;
1071 }
1072
1073 return count;
1074
1075 unwind:
1076 /* disable any enabled and non active backends */
1077 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1078 struct snd_soc_pcm_runtime *be = dpcm->be;
1079 struct snd_pcm_substream *be_substream =
1080 snd_soc_dpcm_get_substream(be, stream);
1081
1082 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1083 continue;
1084
1085 if (be->dpcm[stream].users == 0)
1086 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1087 stream ? "capture" : "playback",
1088 be->dpcm[stream].state);
1089
1090 if (--be->dpcm[stream].users != 0)
1091 continue;
1092
1093 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1094 continue;
1095
1096 soc_pcm_close(be_substream);
1097 be_substream->runtime = NULL;
1098 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1099 }
1100
1101 return err;
1102 }
1103
1104 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1105 {
1106 struct snd_pcm_runtime *runtime = substream->runtime;
1107 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1108 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1109 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1110
1111 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1112 runtime->hw.rate_min = cpu_dai_drv->playback.rate_min;
1113 runtime->hw.rate_max = cpu_dai_drv->playback.rate_max;
1114 runtime->hw.channels_min = cpu_dai_drv->playback.channels_min;
1115 runtime->hw.channels_max = cpu_dai_drv->playback.channels_max;
1116 runtime->hw.formats &= cpu_dai_drv->playback.formats;
1117 runtime->hw.rates = cpu_dai_drv->playback.rates;
1118 } else {
1119 runtime->hw.rate_min = cpu_dai_drv->capture.rate_min;
1120 runtime->hw.rate_max = cpu_dai_drv->capture.rate_max;
1121 runtime->hw.channels_min = cpu_dai_drv->capture.channels_min;
1122 runtime->hw.channels_max = cpu_dai_drv->capture.channels_max;
1123 runtime->hw.formats &= cpu_dai_drv->capture.formats;
1124 runtime->hw.rates = cpu_dai_drv->capture.rates;
1125 }
1126 }
1127
1128 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1129 {
1130 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1131 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1132 int stream = fe_substream->stream, ret = 0;
1133
1134 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1135
1136 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1137 if (ret < 0) {
1138 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1139 goto be_err;
1140 }
1141
1142 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1143
1144 /* start the DAI frontend */
1145 ret = soc_pcm_open(fe_substream);
1146 if (ret < 0) {
1147 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1148 goto unwind;
1149 }
1150
1151 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1152
1153 dpcm_set_fe_runtime(fe_substream);
1154 snd_pcm_limit_hw_rates(runtime);
1155
1156 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1157 return 0;
1158
1159 unwind:
1160 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1161 be_err:
1162 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1163 return ret;
1164 }
1165
1166 static int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1167 {
1168 struct snd_soc_dpcm *dpcm;
1169
1170 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1171 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1172
1173 struct snd_soc_pcm_runtime *be = dpcm->be;
1174 struct snd_pcm_substream *be_substream =
1175 snd_soc_dpcm_get_substream(be, stream);
1176
1177 /* is this op for this BE ? */
1178 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1179 continue;
1180
1181 if (be->dpcm[stream].users == 0)
1182 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1183 stream ? "capture" : "playback",
1184 be->dpcm[stream].state);
1185
1186 if (--be->dpcm[stream].users != 0)
1187 continue;
1188
1189 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1190 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1191 continue;
1192
1193 dev_dbg(be->dev, "ASoC: close BE %s\n",
1194 dpcm->fe->dai_link->name);
1195
1196 soc_pcm_close(be_substream);
1197 be_substream->runtime = NULL;
1198
1199 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1200 }
1201 return 0;
1202 }
1203
1204 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1205 {
1206 struct snd_soc_pcm_runtime *fe = substream->private_data;
1207 int stream = substream->stream;
1208
1209 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1210
1211 /* shutdown the BEs */
1212 dpcm_be_dai_shutdown(fe, substream->stream);
1213
1214 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1215
1216 /* now shutdown the frontend */
1217 soc_pcm_close(substream);
1218
1219 /* run the stream event for each BE */
1220 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1221
1222 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1223 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1224 return 0;
1225 }
1226
1227 static int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1228 {
1229 struct snd_soc_dpcm *dpcm;
1230
1231 /* only hw_params backends that are either sinks or sources
1232 * to this frontend DAI */
1233 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1234
1235 struct snd_soc_pcm_runtime *be = dpcm->be;
1236 struct snd_pcm_substream *be_substream =
1237 snd_soc_dpcm_get_substream(be, stream);
1238
1239 /* is this op for this BE ? */
1240 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1241 continue;
1242
1243 /* only free hw when no longer used - check all FEs */
1244 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1245 continue;
1246
1247 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1248 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1249 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1250 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1251 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1252 continue;
1253
1254 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1255 dpcm->fe->dai_link->name);
1256
1257 soc_pcm_hw_free(be_substream);
1258
1259 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1260 }
1261
1262 return 0;
1263 }
1264
1265 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1266 {
1267 struct snd_soc_pcm_runtime *fe = substream->private_data;
1268 int err, stream = substream->stream;
1269
1270 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1271 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1272
1273 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1274
1275 /* call hw_free on the frontend */
1276 err = soc_pcm_hw_free(substream);
1277 if (err < 0)
1278 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
1279 fe->dai_link->name);
1280
1281 /* only hw_params backends that are either sinks or sources
1282 * to this frontend DAI */
1283 err = dpcm_be_dai_hw_free(fe, stream);
1284
1285 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1286 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1287
1288 mutex_unlock(&fe->card->mutex);
1289 return 0;
1290 }
1291
1292 static int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1293 {
1294 struct snd_soc_dpcm *dpcm;
1295 int ret;
1296
1297 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1298
1299 struct snd_soc_pcm_runtime *be = dpcm->be;
1300 struct snd_pcm_substream *be_substream =
1301 snd_soc_dpcm_get_substream(be, stream);
1302
1303 /* is this op for this BE ? */
1304 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1305 continue;
1306
1307 /* only allow hw_params() if no connected FEs are running */
1308 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1309 continue;
1310
1311 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1312 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1313 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1314 continue;
1315
1316 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1317 dpcm->fe->dai_link->name);
1318
1319 /* copy params for each dpcm */
1320 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1321 sizeof(struct snd_pcm_hw_params));
1322
1323 /* perform any hw_params fixups */
1324 if (be->dai_link->be_hw_params_fixup) {
1325 ret = be->dai_link->be_hw_params_fixup(be,
1326 &dpcm->hw_params);
1327 if (ret < 0) {
1328 dev_err(be->dev,
1329 "ASoC: hw_params BE fixup failed %d\n",
1330 ret);
1331 goto unwind;
1332 }
1333 }
1334
1335 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1336 if (ret < 0) {
1337 dev_err(dpcm->be->dev,
1338 "ASoC: hw_params BE failed %d\n", ret);
1339 goto unwind;
1340 }
1341
1342 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1343 }
1344 return 0;
1345
1346 unwind:
1347 /* disable any enabled and non active backends */
1348 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1349 struct snd_soc_pcm_runtime *be = dpcm->be;
1350 struct snd_pcm_substream *be_substream =
1351 snd_soc_dpcm_get_substream(be, stream);
1352
1353 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1354 continue;
1355
1356 /* only allow hw_free() if no connected FEs are running */
1357 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1358 continue;
1359
1360 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1361 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1362 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1363 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1364 continue;
1365
1366 soc_pcm_hw_free(be_substream);
1367 }
1368
1369 return ret;
1370 }
1371
1372 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1373 struct snd_pcm_hw_params *params)
1374 {
1375 struct snd_soc_pcm_runtime *fe = substream->private_data;
1376 int ret, stream = substream->stream;
1377
1378 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1379 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1380
1381 memcpy(&fe->dpcm[substream->stream].hw_params, params,
1382 sizeof(struct snd_pcm_hw_params));
1383 ret = dpcm_be_dai_hw_params(fe, substream->stream);
1384 if (ret < 0) {
1385 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
1386 goto out;
1387 }
1388
1389 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1390 fe->dai_link->name, params_rate(params),
1391 params_channels(params), params_format(params));
1392
1393 /* call hw_params on the frontend */
1394 ret = soc_pcm_hw_params(substream, params);
1395 if (ret < 0) {
1396 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
1397 dpcm_be_dai_hw_free(fe, stream);
1398 } else
1399 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1400
1401 out:
1402 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1403 mutex_unlock(&fe->card->mutex);
1404 return ret;
1405 }
1406
1407 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
1408 struct snd_pcm_substream *substream, int cmd)
1409 {
1410 int ret;
1411
1412 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
1413 dpcm->fe->dai_link->name, cmd);
1414
1415 ret = soc_pcm_trigger(substream, cmd);
1416 if (ret < 0)
1417 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
1418
1419 return ret;
1420 }
1421
1422 static int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
1423 int cmd)
1424 {
1425 struct snd_soc_dpcm *dpcm;
1426 int ret = 0;
1427
1428 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1429
1430 struct snd_soc_pcm_runtime *be = dpcm->be;
1431 struct snd_pcm_substream *be_substream =
1432 snd_soc_dpcm_get_substream(be, stream);
1433
1434 /* is this op for this BE ? */
1435 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1436 continue;
1437
1438 switch (cmd) {
1439 case SNDRV_PCM_TRIGGER_START:
1440 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1441 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1442 continue;
1443
1444 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1445 if (ret)
1446 return ret;
1447
1448 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1449 break;
1450 case SNDRV_PCM_TRIGGER_RESUME:
1451 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1452 continue;
1453
1454 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1455 if (ret)
1456 return ret;
1457
1458 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1459 break;
1460 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1461 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
1462 continue;
1463
1464 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1465 if (ret)
1466 return ret;
1467
1468 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1469 break;
1470 case SNDRV_PCM_TRIGGER_STOP:
1471 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1472 continue;
1473
1474 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1475 continue;
1476
1477 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1478 if (ret)
1479 return ret;
1480
1481 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1482 break;
1483 case SNDRV_PCM_TRIGGER_SUSPEND:
1484 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)
1485 continue;
1486
1487 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1488 continue;
1489
1490 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1491 if (ret)
1492 return ret;
1493
1494 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
1495 break;
1496 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1497 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1498 continue;
1499
1500 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1501 continue;
1502
1503 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1504 if (ret)
1505 return ret;
1506
1507 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
1508 break;
1509 }
1510 }
1511
1512 return ret;
1513 }
1514 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
1515
1516 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
1517 {
1518 struct snd_soc_pcm_runtime *fe = substream->private_data;
1519 int stream = substream->stream, ret;
1520 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1521
1522 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1523
1524 switch (trigger) {
1525 case SND_SOC_DPCM_TRIGGER_PRE:
1526 /* call trigger on the frontend before the backend. */
1527
1528 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
1529 fe->dai_link->name, cmd);
1530
1531 ret = soc_pcm_trigger(substream, cmd);
1532 if (ret < 0) {
1533 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1534 goto out;
1535 }
1536
1537 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1538 break;
1539 case SND_SOC_DPCM_TRIGGER_POST:
1540 /* call trigger on the frontend after the backend. */
1541
1542 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1543 if (ret < 0) {
1544 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1545 goto out;
1546 }
1547
1548 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
1549 fe->dai_link->name, cmd);
1550
1551 ret = soc_pcm_trigger(substream, cmd);
1552 break;
1553 case SND_SOC_DPCM_TRIGGER_BESPOKE:
1554 /* bespoke trigger() - handles both FE and BEs */
1555
1556 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
1557 fe->dai_link->name, cmd);
1558
1559 ret = soc_pcm_bespoke_trigger(substream, cmd);
1560 if (ret < 0) {
1561 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1562 goto out;
1563 }
1564 break;
1565 default:
1566 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
1567 fe->dai_link->name);
1568 ret = -EINVAL;
1569 goto out;
1570 }
1571
1572 switch (cmd) {
1573 case SNDRV_PCM_TRIGGER_START:
1574 case SNDRV_PCM_TRIGGER_RESUME:
1575 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1576 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1577 break;
1578 case SNDRV_PCM_TRIGGER_STOP:
1579 case SNDRV_PCM_TRIGGER_SUSPEND:
1580 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1581 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1582 break;
1583 }
1584
1585 out:
1586 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1587 return ret;
1588 }
1589
1590 static int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
1591 {
1592 struct snd_soc_dpcm *dpcm;
1593 int ret = 0;
1594
1595 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1596
1597 struct snd_soc_pcm_runtime *be = dpcm->be;
1598 struct snd_pcm_substream *be_substream =
1599 snd_soc_dpcm_get_substream(be, stream);
1600
1601 /* is this op for this BE ? */
1602 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1603 continue;
1604
1605 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1606 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1607 continue;
1608
1609 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
1610 dpcm->fe->dai_link->name);
1611
1612 ret = soc_pcm_prepare(be_substream);
1613 if (ret < 0) {
1614 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
1615 ret);
1616 break;
1617 }
1618
1619 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
1620 }
1621 return ret;
1622 }
1623
1624 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
1625 {
1626 struct snd_soc_pcm_runtime *fe = substream->private_data;
1627 int stream = substream->stream, ret = 0;
1628
1629 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1630
1631 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
1632
1633 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1634
1635 /* there is no point preparing this FE if there are no BEs */
1636 if (list_empty(&fe->dpcm[stream].be_clients)) {
1637 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
1638 fe->dai_link->name);
1639 ret = -EINVAL;
1640 goto out;
1641 }
1642
1643 ret = dpcm_be_dai_prepare(fe, substream->stream);
1644 if (ret < 0)
1645 goto out;
1646
1647 /* call prepare on the frontend */
1648 ret = soc_pcm_prepare(substream);
1649 if (ret < 0) {
1650 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
1651 fe->dai_link->name);
1652 goto out;
1653 }
1654
1655 /* run the stream event for each BE */
1656 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
1657 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
1658
1659 out:
1660 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1661 mutex_unlock(&fe->card->mutex);
1662
1663 return ret;
1664 }
1665
1666 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
1667 unsigned int cmd, void *arg)
1668 {
1669 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1670 struct snd_soc_platform *platform = rtd->platform;
1671
1672 if (platform->driver->ops->ioctl)
1673 return platform->driver->ops->ioctl(substream, cmd, arg);
1674 return snd_pcm_lib_ioctl(substream, cmd, arg);
1675 }
1676
1677 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1678 {
1679 struct snd_pcm_substream *substream =
1680 snd_soc_dpcm_get_substream(fe, stream);
1681 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1682 int err;
1683
1684 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
1685 stream ? "capture" : "playback", fe->dai_link->name);
1686
1687 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
1688 /* call bespoke trigger - FE takes care of all BE triggers */
1689 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
1690 fe->dai_link->name);
1691
1692 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
1693 if (err < 0)
1694 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
1695 } else {
1696 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
1697 fe->dai_link->name);
1698
1699 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
1700 if (err < 0)
1701 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
1702 }
1703
1704 err = dpcm_be_dai_hw_free(fe, stream);
1705 if (err < 0)
1706 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
1707
1708 err = dpcm_be_dai_shutdown(fe, stream);
1709 if (err < 0)
1710 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
1711
1712 /* run the stream event for each BE */
1713 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
1714
1715 return 0;
1716 }
1717
1718 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
1719 {
1720 struct snd_pcm_substream *substream =
1721 snd_soc_dpcm_get_substream(fe, stream);
1722 struct snd_soc_dpcm *dpcm;
1723 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1724 int ret;
1725
1726 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
1727 stream ? "capture" : "playback", fe->dai_link->name);
1728
1729 /* Only start the BE if the FE is ready */
1730 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
1731 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
1732 return -EINVAL;
1733
1734 /* startup must always be called for new BEs */
1735 ret = dpcm_be_dai_startup(fe, stream);
1736 if (ret < 0)
1737 goto disconnect;
1738
1739 /* keep going if FE state is > open */
1740 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
1741 return 0;
1742
1743 ret = dpcm_be_dai_hw_params(fe, stream);
1744 if (ret < 0)
1745 goto close;
1746
1747 /* keep going if FE state is > hw_params */
1748 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
1749 return 0;
1750
1751
1752 ret = dpcm_be_dai_prepare(fe, stream);
1753 if (ret < 0)
1754 goto hw_free;
1755
1756 /* run the stream event for each BE */
1757 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
1758
1759 /* keep going if FE state is > prepare */
1760 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
1761 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
1762 return 0;
1763
1764 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
1765 /* call trigger on the frontend - FE takes care of all BE triggers */
1766 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
1767 fe->dai_link->name);
1768
1769 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
1770 if (ret < 0) {
1771 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
1772 goto hw_free;
1773 }
1774 } else {
1775 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
1776 fe->dai_link->name);
1777
1778 ret = dpcm_be_dai_trigger(fe, stream,
1779 SNDRV_PCM_TRIGGER_START);
1780 if (ret < 0) {
1781 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1782 goto hw_free;
1783 }
1784 }
1785
1786 return 0;
1787
1788 hw_free:
1789 dpcm_be_dai_hw_free(fe, stream);
1790 close:
1791 dpcm_be_dai_shutdown(fe, stream);
1792 disconnect:
1793 /* disconnect any non started BEs */
1794 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1795 struct snd_soc_pcm_runtime *be = dpcm->be;
1796 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1797 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1798 }
1799
1800 return ret;
1801 }
1802
1803 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
1804 {
1805 int ret;
1806
1807 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1808 ret = dpcm_run_update_startup(fe, stream);
1809 if (ret < 0)
1810 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
1811 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1812
1813 return ret;
1814 }
1815
1816 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
1817 {
1818 int ret;
1819
1820 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1821 ret = dpcm_run_update_shutdown(fe, stream);
1822 if (ret < 0)
1823 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
1824 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
1825
1826 return ret;
1827 }
1828
1829 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
1830 * any DAI links.
1831 */
1832 int soc_dpcm_runtime_update(struct snd_soc_dapm_widget *widget)
1833 {
1834 struct snd_soc_card *card;
1835 int i, old, new, paths;
1836
1837 if (widget->codec)
1838 card = widget->codec->card;
1839 else if (widget->platform)
1840 card = widget->platform->card;
1841 else
1842 return -EINVAL;
1843
1844 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1845 for (i = 0; i < card->num_rtd; i++) {
1846 struct snd_soc_dapm_widget_list *list;
1847 struct snd_soc_pcm_runtime *fe = &card->rtd[i];
1848
1849 /* make sure link is FE */
1850 if (!fe->dai_link->dynamic)
1851 continue;
1852
1853 /* only check active links */
1854 if (!fe->cpu_dai->active)
1855 continue;
1856
1857 /* DAPM sync will call this to update DSP paths */
1858 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
1859 fe->dai_link->name);
1860
1861 /* skip if FE doesn't have playback capability */
1862 if (!fe->cpu_dai->driver->playback.channels_min)
1863 goto capture;
1864
1865 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
1866 if (paths < 0) {
1867 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
1868 fe->dai_link->name, "playback");
1869 mutex_unlock(&card->mutex);
1870 return paths;
1871 }
1872
1873 /* update any new playback paths */
1874 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
1875 if (new) {
1876 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
1877 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
1878 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
1879 }
1880
1881 /* update any old playback paths */
1882 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
1883 if (old) {
1884 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
1885 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
1886 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
1887 }
1888
1889 capture:
1890 /* skip if FE doesn't have capture capability */
1891 if (!fe->cpu_dai->driver->capture.channels_min)
1892 continue;
1893
1894 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
1895 if (paths < 0) {
1896 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
1897 fe->dai_link->name, "capture");
1898 mutex_unlock(&card->mutex);
1899 return paths;
1900 }
1901
1902 /* update any new capture paths */
1903 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
1904 if (new) {
1905 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
1906 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
1907 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
1908 }
1909
1910 /* update any old capture paths */
1911 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
1912 if (old) {
1913 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
1914 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
1915 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
1916 }
1917
1918 dpcm_path_put(&list);
1919 }
1920
1921 mutex_unlock(&card->mutex);
1922 return 0;
1923 }
1924 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
1925 {
1926 struct snd_soc_dpcm *dpcm;
1927 struct list_head *clients =
1928 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
1929
1930 list_for_each_entry(dpcm, clients, list_be) {
1931
1932 struct snd_soc_pcm_runtime *be = dpcm->be;
1933 struct snd_soc_dai *dai = be->codec_dai;
1934 struct snd_soc_dai_driver *drv = dai->driver;
1935
1936 if (be->dai_link->ignore_suspend)
1937 continue;
1938
1939 dev_dbg(be->dev, "ASoC: BE digital mute %s\n", be->dai_link->name);
1940
1941 if (drv->ops->digital_mute && dai->playback_active)
1942 drv->ops->digital_mute(dai, mute);
1943 }
1944
1945 return 0;
1946 }
1947
1948 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
1949 {
1950 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1951 struct snd_soc_dpcm *dpcm;
1952 struct snd_soc_dapm_widget_list *list;
1953 int ret;
1954 int stream = fe_substream->stream;
1955
1956 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1957 fe->dpcm[stream].runtime = fe_substream->runtime;
1958
1959 if (dpcm_path_get(fe, stream, &list) <= 0) {
1960 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
1961 fe->dai_link->name, stream ? "capture" : "playback");
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
1983 static 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 */
2004 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2005 {
2006 struct snd_soc_platform *platform = rtd->platform;
2007 struct snd_soc_dai *codec_dai = rtd->codec_dai;
2008 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2009 struct snd_pcm *pcm;
2010 char new_name[64];
2011 int ret = 0, playback = 0, capture = 0;
2012
2013 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2014 if (cpu_dai->driver->playback.channels_min)
2015 playback = 1;
2016 if (cpu_dai->driver->capture.channels_min)
2017 capture = 1;
2018 } else {
2019 if (codec_dai->driver->playback.channels_min &&
2020 cpu_dai->driver->playback.channels_min)
2021 playback = 1;
2022 if (codec_dai->driver->capture.channels_min &&
2023 cpu_dai->driver->capture.channels_min)
2024 capture = 1;
2025 }
2026
2027 /* create the PCM */
2028 if (rtd->dai_link->no_pcm) {
2029 snprintf(new_name, sizeof(new_name), "(%s)",
2030 rtd->dai_link->stream_name);
2031
2032 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2033 playback, capture, &pcm);
2034 } else {
2035 if (rtd->dai_link->dynamic)
2036 snprintf(new_name, sizeof(new_name), "%s (*)",
2037 rtd->dai_link->stream_name);
2038 else
2039 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2040 rtd->dai_link->stream_name, codec_dai->name, num);
2041
2042 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2043 capture, &pcm);
2044 }
2045 if (ret < 0) {
2046 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2047 rtd->dai_link->name);
2048 return ret;
2049 }
2050 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2051
2052 /* DAPM dai link stream work */
2053 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2054
2055 rtd->pcm = pcm;
2056 pcm->private_data = rtd;
2057
2058 if (rtd->dai_link->no_pcm) {
2059 if (playback)
2060 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2061 if (capture)
2062 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2063 goto out;
2064 }
2065
2066 /* ASoC PCM operations */
2067 if (rtd->dai_link->dynamic) {
2068 rtd->ops.open = dpcm_fe_dai_open;
2069 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2070 rtd->ops.prepare = dpcm_fe_dai_prepare;
2071 rtd->ops.trigger = dpcm_fe_dai_trigger;
2072 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2073 rtd->ops.close = dpcm_fe_dai_close;
2074 rtd->ops.pointer = soc_pcm_pointer;
2075 rtd->ops.ioctl = soc_pcm_ioctl;
2076 } else {
2077 rtd->ops.open = soc_pcm_open;
2078 rtd->ops.hw_params = soc_pcm_hw_params;
2079 rtd->ops.prepare = soc_pcm_prepare;
2080 rtd->ops.trigger = soc_pcm_trigger;
2081 rtd->ops.hw_free = soc_pcm_hw_free;
2082 rtd->ops.close = soc_pcm_close;
2083 rtd->ops.pointer = soc_pcm_pointer;
2084 rtd->ops.ioctl = soc_pcm_ioctl;
2085 }
2086
2087 if (platform->driver->ops) {
2088 rtd->ops.ack = platform->driver->ops->ack;
2089 rtd->ops.copy = platform->driver->ops->copy;
2090 rtd->ops.silence = platform->driver->ops->silence;
2091 rtd->ops.page = platform->driver->ops->page;
2092 rtd->ops.mmap = platform->driver->ops->mmap;
2093 }
2094
2095 if (playback)
2096 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2097
2098 if (capture)
2099 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2100
2101 if (platform->driver->pcm_new) {
2102 ret = platform->driver->pcm_new(rtd);
2103 if (ret < 0) {
2104 dev_err(platform->dev,
2105 "ASoC: pcm constructor failed: %d\n",
2106 ret);
2107 return ret;
2108 }
2109 }
2110
2111 pcm->private_free = platform->driver->pcm_free;
2112 out:
2113 dev_info(rtd->card->dev, " %s <-> %s mapping ok\n", codec_dai->name,
2114 cpu_dai->name);
2115 return ret;
2116 }
2117
2118 /* is the current PCM operation for this FE ? */
2119 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2120 {
2121 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2122 return 1;
2123 return 0;
2124 }
2125 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2126
2127 /* is the current PCM operation for this BE ? */
2128 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2129 struct snd_soc_pcm_runtime *be, int stream)
2130 {
2131 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2132 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2133 be->dpcm[stream].runtime_update))
2134 return 1;
2135 return 0;
2136 }
2137 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2138
2139 /* get the substream for this BE */
2140 struct snd_pcm_substream *
2141 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2142 {
2143 return be->pcm->streams[stream].substream;
2144 }
2145 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2146
2147 /* get the BE runtime state */
2148 enum snd_soc_dpcm_state
2149 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2150 {
2151 return be->dpcm[stream].state;
2152 }
2153 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
2154
2155 /* set the BE runtime state */
2156 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
2157 int stream, enum snd_soc_dpcm_state state)
2158 {
2159 be->dpcm[stream].state = state;
2160 }
2161 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
2162
2163 /*
2164 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2165 * are not running, paused or suspended for the specified stream direction.
2166 */
2167 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2168 struct snd_soc_pcm_runtime *be, int stream)
2169 {
2170 struct snd_soc_dpcm *dpcm;
2171 int state;
2172
2173 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2174
2175 if (dpcm->fe == fe)
2176 continue;
2177
2178 state = dpcm->fe->dpcm[stream].state;
2179 if (state == SND_SOC_DPCM_STATE_START ||
2180 state == SND_SOC_DPCM_STATE_PAUSED ||
2181 state == SND_SOC_DPCM_STATE_SUSPEND)
2182 return 0;
2183 }
2184
2185 /* it's safe to free/stop this BE DAI */
2186 return 1;
2187 }
2188 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2189
2190 /*
2191 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2192 * running, paused or suspended for the specified stream direction.
2193 */
2194 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2195 struct snd_soc_pcm_runtime *be, int stream)
2196 {
2197 struct snd_soc_dpcm *dpcm;
2198 int state;
2199
2200 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2201
2202 if (dpcm->fe == fe)
2203 continue;
2204
2205 state = dpcm->fe->dpcm[stream].state;
2206 if (state == SND_SOC_DPCM_STATE_START ||
2207 state == SND_SOC_DPCM_STATE_PAUSED ||
2208 state == SND_SOC_DPCM_STATE_SUSPEND ||
2209 state == SND_SOC_DPCM_STATE_PREPARE)
2210 return 0;
2211 }
2212
2213 /* it's safe to change hw_params */
2214 return 1;
2215 }
2216 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2217
2218 int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
2219 int cmd, struct snd_soc_platform *platform)
2220 {
2221 if (platform->driver->ops->trigger)
2222 return platform->driver->ops->trigger(substream, cmd);
2223 return 0;
2224 }
2225 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger);
2226
2227 #ifdef CONFIG_DEBUG_FS
2228 static char *dpcm_state_string(enum snd_soc_dpcm_state state)
2229 {
2230 switch (state) {
2231 case SND_SOC_DPCM_STATE_NEW:
2232 return "new";
2233 case SND_SOC_DPCM_STATE_OPEN:
2234 return "open";
2235 case SND_SOC_DPCM_STATE_HW_PARAMS:
2236 return "hw_params";
2237 case SND_SOC_DPCM_STATE_PREPARE:
2238 return "prepare";
2239 case SND_SOC_DPCM_STATE_START:
2240 return "start";
2241 case SND_SOC_DPCM_STATE_STOP:
2242 return "stop";
2243 case SND_SOC_DPCM_STATE_SUSPEND:
2244 return "suspend";
2245 case SND_SOC_DPCM_STATE_PAUSED:
2246 return "paused";
2247 case SND_SOC_DPCM_STATE_HW_FREE:
2248 return "hw_free";
2249 case SND_SOC_DPCM_STATE_CLOSE:
2250 return "close";
2251 }
2252
2253 return "unknown";
2254 }
2255
2256 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2257 int stream, char *buf, size_t size)
2258 {
2259 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2260 struct snd_soc_dpcm *dpcm;
2261 ssize_t offset = 0;
2262
2263 /* FE state */
2264 offset += snprintf(buf + offset, size - offset,
2265 "[%s - %s]\n", fe->dai_link->name,
2266 stream ? "Capture" : "Playback");
2267
2268 offset += snprintf(buf + offset, size - offset, "State: %s\n",
2269 dpcm_state_string(fe->dpcm[stream].state));
2270
2271 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2272 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2273 offset += snprintf(buf + offset, size - offset,
2274 "Hardware Params: "
2275 "Format = %s, Channels = %d, Rate = %d\n",
2276 snd_pcm_format_name(params_format(params)),
2277 params_channels(params),
2278 params_rate(params));
2279
2280 /* BEs state */
2281 offset += snprintf(buf + offset, size - offset, "Backends:\n");
2282
2283 if (list_empty(&fe->dpcm[stream].be_clients)) {
2284 offset += snprintf(buf + offset, size - offset,
2285 " No active DSP links\n");
2286 goto out;
2287 }
2288
2289 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2290 struct snd_soc_pcm_runtime *be = dpcm->be;
2291 params = &dpcm->hw_params;
2292
2293 offset += snprintf(buf + offset, size - offset,
2294 "- %s\n", be->dai_link->name);
2295
2296 offset += snprintf(buf + offset, size - offset,
2297 " State: %s\n",
2298 dpcm_state_string(be->dpcm[stream].state));
2299
2300 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2301 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2302 offset += snprintf(buf + offset, size - offset,
2303 " Hardware Params: "
2304 "Format = %s, Channels = %d, Rate = %d\n",
2305 snd_pcm_format_name(params_format(params)),
2306 params_channels(params),
2307 params_rate(params));
2308 }
2309
2310 out:
2311 return offset;
2312 }
2313
2314 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
2315 size_t count, loff_t *ppos)
2316 {
2317 struct snd_soc_pcm_runtime *fe = file->private_data;
2318 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
2319 char *buf;
2320
2321 buf = kmalloc(out_count, GFP_KERNEL);
2322 if (!buf)
2323 return -ENOMEM;
2324
2325 if (fe->cpu_dai->driver->playback.channels_min)
2326 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
2327 buf + offset, out_count - offset);
2328
2329 if (fe->cpu_dai->driver->capture.channels_min)
2330 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
2331 buf + offset, out_count - offset);
2332
2333 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
2334
2335 kfree(buf);
2336 return ret;
2337 }
2338
2339 static const struct file_operations dpcm_state_fops = {
2340 .open = simple_open,
2341 .read = dpcm_state_read_file,
2342 .llseek = default_llseek,
2343 };
2344
2345 int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
2346 {
2347 if (!rtd->dai_link)
2348 return 0;
2349
2350 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
2351 rtd->card->debugfs_card_root);
2352 if (!rtd->debugfs_dpcm_root) {
2353 dev_dbg(rtd->dev,
2354 "ASoC: Failed to create dpcm debugfs directory %s\n",
2355 rtd->dai_link->name);
2356 return -EINVAL;
2357 }
2358
2359 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
2360 rtd->debugfs_dpcm_root,
2361 rtd, &dpcm_state_fops);
2362
2363 return 0;
2364 }
2365 #endif
kernel source for telekom puls (alcatel/mediatek)