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