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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[deliverable/linux.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_platform *platform = rtd->platform;
1059 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1060 struct snd_soc_dai *codec_dai;
1061 int i, ret;
1062
1063 for (i = 0; i < rtd->num_codecs; i++) {
1064 codec_dai = rtd->codec_dais[i];
1065 if (codec_dai->driver->ops &&
1066 codec_dai->driver->ops->bespoke_trigger) {
1067 ret = codec_dai->driver->ops->bespoke_trigger(substream,
1068 cmd, codec_dai);
1069 if (ret < 0)
1070 return ret;
1071 }
1072 }
1073
1074 if (platform->driver->bespoke_trigger) {
1075 ret = platform->driver->bespoke_trigger(substream, cmd);
1076 if (ret < 0)
1077 return ret;
1078 }
1079
1080 if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) {
1081 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1082 if (ret < 0)
1083 return ret;
1084 }
1085 return 0;
1086 }
1087 /*
1088 * soc level wrapper for pointer callback
1089 * If cpu_dai, codec_dai, platform driver has the delay callback, than
1090 * the runtime->delay will be updated accordingly.
1091 */
1092 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1093 {
1094 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1095 struct snd_soc_platform *platform = rtd->platform;
1096 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1097 struct snd_soc_dai *codec_dai;
1098 struct snd_pcm_runtime *runtime = substream->runtime;
1099 snd_pcm_uframes_t offset = 0;
1100 snd_pcm_sframes_t delay = 0;
1101 snd_pcm_sframes_t codec_delay = 0;
1102 int i;
1103
1104 if (platform->driver->ops && platform->driver->ops->pointer)
1105 offset = platform->driver->ops->pointer(substream);
1106
1107 if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay)
1108 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1109
1110 for (i = 0; i < rtd->num_codecs; i++) {
1111 codec_dai = rtd->codec_dais[i];
1112 if (codec_dai->driver->ops && codec_dai->driver->ops->delay)
1113 codec_delay = max(codec_delay,
1114 codec_dai->driver->ops->delay(substream,
1115 codec_dai));
1116 }
1117 delay += codec_delay;
1118
1119 /*
1120 * None of the existing platform drivers implement delay(), so
1121 * for now the codec_dai of first multicodec entry is used
1122 */
1123 if (platform->driver->delay)
1124 delay += platform->driver->delay(substream, rtd->codec_dais[0]);
1125
1126 runtime->delay = delay;
1127
1128 return offset;
1129 }
1130
1131 /* connect a FE and BE */
1132 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1133 struct snd_soc_pcm_runtime *be, int stream)
1134 {
1135 struct snd_soc_dpcm *dpcm;
1136
1137 /* only add new dpcms */
1138 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1139 if (dpcm->be == be && dpcm->fe == fe)
1140 return 0;
1141 }
1142
1143 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1144 if (!dpcm)
1145 return -ENOMEM;
1146
1147 dpcm->be = be;
1148 dpcm->fe = fe;
1149 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1150 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1151 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1152 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1153
1154 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1155 stream ? "capture" : "playback", fe->dai_link->name,
1156 stream ? "<-" : "->", be->dai_link->name);
1157
1158 #ifdef CONFIG_DEBUG_FS
1159 if (fe->debugfs_dpcm_root)
1160 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1161 fe->debugfs_dpcm_root, &dpcm->state);
1162 #endif
1163 return 1;
1164 }
1165
1166 /* reparent a BE onto another FE */
1167 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1168 struct snd_soc_pcm_runtime *be, int stream)
1169 {
1170 struct snd_soc_dpcm *dpcm;
1171 struct snd_pcm_substream *fe_substream, *be_substream;
1172
1173 /* reparent if BE is connected to other FEs */
1174 if (!be->dpcm[stream].users)
1175 return;
1176
1177 be_substream = snd_soc_dpcm_get_substream(be, stream);
1178
1179 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
1180 if (dpcm->fe == fe)
1181 continue;
1182
1183 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1184 stream ? "capture" : "playback",
1185 dpcm->fe->dai_link->name,
1186 stream ? "<-" : "->", dpcm->be->dai_link->name);
1187
1188 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1189 be_substream->runtime = fe_substream->runtime;
1190 break;
1191 }
1192 }
1193
1194 /* disconnect a BE and FE */
1195 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1196 {
1197 struct snd_soc_dpcm *dpcm, *d;
1198
1199 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
1200 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1201 stream ? "capture" : "playback",
1202 dpcm->be->dai_link->name);
1203
1204 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1205 continue;
1206
1207 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1208 stream ? "capture" : "playback", fe->dai_link->name,
1209 stream ? "<-" : "->", dpcm->be->dai_link->name);
1210
1211 /* BEs still alive need new FE */
1212 dpcm_be_reparent(fe, dpcm->be, stream);
1213
1214 #ifdef CONFIG_DEBUG_FS
1215 debugfs_remove(dpcm->debugfs_state);
1216 #endif
1217 list_del(&dpcm->list_be);
1218 list_del(&dpcm->list_fe);
1219 kfree(dpcm);
1220 }
1221 }
1222
1223 /* get BE for DAI widget and stream */
1224 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1225 struct snd_soc_dapm_widget *widget, int stream)
1226 {
1227 struct snd_soc_pcm_runtime *be;
1228 int i;
1229
1230 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1231 list_for_each_entry(be, &card->rtd_list, list) {
1232
1233 if (!be->dai_link->no_pcm)
1234 continue;
1235
1236 if (be->cpu_dai->playback_widget == widget)
1237 return be;
1238
1239 for (i = 0; i < be->num_codecs; i++) {
1240 struct snd_soc_dai *dai = be->codec_dais[i];
1241 if (dai->playback_widget == widget)
1242 return be;
1243 }
1244 }
1245 } else {
1246
1247 list_for_each_entry(be, &card->rtd_list, list) {
1248
1249 if (!be->dai_link->no_pcm)
1250 continue;
1251
1252 if (be->cpu_dai->capture_widget == widget)
1253 return be;
1254
1255 for (i = 0; i < be->num_codecs; i++) {
1256 struct snd_soc_dai *dai = be->codec_dais[i];
1257 if (dai->capture_widget == widget)
1258 return be;
1259 }
1260 }
1261 }
1262
1263 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1264 stream ? "capture" : "playback", widget->name);
1265 return NULL;
1266 }
1267
1268 static inline struct snd_soc_dapm_widget *
1269 dai_get_widget(struct snd_soc_dai *dai, int stream)
1270 {
1271 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1272 return dai->playback_widget;
1273 else
1274 return dai->capture_widget;
1275 }
1276
1277 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1278 struct snd_soc_dapm_widget *widget)
1279 {
1280 int i;
1281
1282 for (i = 0; i < list->num_widgets; i++) {
1283 if (widget == list->widgets[i])
1284 return 1;
1285 }
1286
1287 return 0;
1288 }
1289
1290 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1291 int stream, struct snd_soc_dapm_widget_list **list)
1292 {
1293 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1294 int paths;
1295
1296 /* get number of valid DAI paths and their widgets */
1297 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list);
1298
1299 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1300 stream ? "capture" : "playback");
1301
1302 return paths;
1303 }
1304
1305 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1306 struct snd_soc_dapm_widget_list **list_)
1307 {
1308 struct snd_soc_dpcm *dpcm;
1309 struct snd_soc_dapm_widget_list *list = *list_;
1310 struct snd_soc_dapm_widget *widget;
1311 int prune = 0;
1312
1313 /* Destroy any old FE <--> BE connections */
1314 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1315 unsigned int i;
1316
1317 /* is there a valid CPU DAI widget for this BE */
1318 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1319
1320 /* prune the BE if it's no longer in our active list */
1321 if (widget && widget_in_list(list, widget))
1322 continue;
1323
1324 /* is there a valid CODEC DAI widget for this BE */
1325 for (i = 0; i < dpcm->be->num_codecs; i++) {
1326 struct snd_soc_dai *dai = dpcm->be->codec_dais[i];
1327 widget = dai_get_widget(dai, stream);
1328
1329 /* prune the BE if it's no longer in our active list */
1330 if (widget && widget_in_list(list, widget))
1331 continue;
1332 }
1333
1334 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1335 stream ? "capture" : "playback",
1336 dpcm->be->dai_link->name, fe->dai_link->name);
1337 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1338 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1339 prune++;
1340 }
1341
1342 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1343 return prune;
1344 }
1345
1346 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1347 struct snd_soc_dapm_widget_list **list_)
1348 {
1349 struct snd_soc_card *card = fe->card;
1350 struct snd_soc_dapm_widget_list *list = *list_;
1351 struct snd_soc_pcm_runtime *be;
1352 int i, new = 0, err;
1353
1354 /* Create any new FE <--> BE connections */
1355 for (i = 0; i < list->num_widgets; i++) {
1356
1357 switch (list->widgets[i]->id) {
1358 case snd_soc_dapm_dai_in:
1359 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1360 continue;
1361 break;
1362 case snd_soc_dapm_dai_out:
1363 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1364 continue;
1365 break;
1366 default:
1367 continue;
1368 }
1369
1370 /* is there a valid BE rtd for this widget */
1371 be = dpcm_get_be(card, list->widgets[i], stream);
1372 if (!be) {
1373 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1374 list->widgets[i]->name);
1375 continue;
1376 }
1377
1378 /* make sure BE is a real BE */
1379 if (!be->dai_link->no_pcm)
1380 continue;
1381
1382 /* don't connect if FE is not running */
1383 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1384 continue;
1385
1386 /* newly connected FE and BE */
1387 err = dpcm_be_connect(fe, be, stream);
1388 if (err < 0) {
1389 dev_err(fe->dev, "ASoC: can't connect %s\n",
1390 list->widgets[i]->name);
1391 break;
1392 } else if (err == 0) /* already connected */
1393 continue;
1394
1395 /* new */
1396 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1397 new++;
1398 }
1399
1400 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1401 return new;
1402 }
1403
1404 /*
1405 * Find the corresponding BE DAIs that source or sink audio to this
1406 * FE substream.
1407 */
1408 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1409 int stream, struct snd_soc_dapm_widget_list **list, int new)
1410 {
1411 if (new)
1412 return dpcm_add_paths(fe, stream, list);
1413 else
1414 return dpcm_prune_paths(fe, stream, list);
1415 }
1416
1417 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1418 {
1419 struct snd_soc_dpcm *dpcm;
1420
1421 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1422 dpcm->be->dpcm[stream].runtime_update =
1423 SND_SOC_DPCM_UPDATE_NO;
1424 }
1425
1426 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1427 int stream)
1428 {
1429 struct snd_soc_dpcm *dpcm;
1430
1431 /* disable any enabled and non active backends */
1432 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1433
1434 struct snd_soc_pcm_runtime *be = dpcm->be;
1435 struct snd_pcm_substream *be_substream =
1436 snd_soc_dpcm_get_substream(be, stream);
1437
1438 if (be->dpcm[stream].users == 0)
1439 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1440 stream ? "capture" : "playback",
1441 be->dpcm[stream].state);
1442
1443 if (--be->dpcm[stream].users != 0)
1444 continue;
1445
1446 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1447 continue;
1448
1449 soc_pcm_close(be_substream);
1450 be_substream->runtime = NULL;
1451 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1452 }
1453 }
1454
1455 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1456 {
1457 struct snd_soc_dpcm *dpcm;
1458 int err, count = 0;
1459
1460 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1461 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1462
1463 struct snd_soc_pcm_runtime *be = dpcm->be;
1464 struct snd_pcm_substream *be_substream =
1465 snd_soc_dpcm_get_substream(be, stream);
1466
1467 if (!be_substream) {
1468 dev_err(be->dev, "ASoC: no backend %s stream\n",
1469 stream ? "capture" : "playback");
1470 continue;
1471 }
1472
1473 /* is this op for this BE ? */
1474 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1475 continue;
1476
1477 /* first time the dpcm is open ? */
1478 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1479 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1480 stream ? "capture" : "playback",
1481 be->dpcm[stream].state);
1482
1483 if (be->dpcm[stream].users++ != 0)
1484 continue;
1485
1486 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1487 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1488 continue;
1489
1490 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1491 stream ? "capture" : "playback", be->dai_link->name);
1492
1493 be_substream->runtime = be->dpcm[stream].runtime;
1494 err = soc_pcm_open(be_substream);
1495 if (err < 0) {
1496 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1497 be->dpcm[stream].users--;
1498 if (be->dpcm[stream].users < 0)
1499 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1500 stream ? "capture" : "playback",
1501 be->dpcm[stream].state);
1502
1503 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1504 goto unwind;
1505 }
1506
1507 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1508 count++;
1509 }
1510
1511 return count;
1512
1513 unwind:
1514 /* disable any enabled and non active backends */
1515 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1516 struct snd_soc_pcm_runtime *be = dpcm->be;
1517 struct snd_pcm_substream *be_substream =
1518 snd_soc_dpcm_get_substream(be, stream);
1519
1520 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1521 continue;
1522
1523 if (be->dpcm[stream].users == 0)
1524 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1525 stream ? "capture" : "playback",
1526 be->dpcm[stream].state);
1527
1528 if (--be->dpcm[stream].users != 0)
1529 continue;
1530
1531 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1532 continue;
1533
1534 soc_pcm_close(be_substream);
1535 be_substream->runtime = NULL;
1536 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1537 }
1538
1539 return err;
1540 }
1541
1542 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1543 struct snd_soc_pcm_stream *stream,
1544 u64 formats)
1545 {
1546 runtime->hw.rate_min = stream->rate_min;
1547 runtime->hw.rate_max = stream->rate_max;
1548 runtime->hw.channels_min = stream->channels_min;
1549 runtime->hw.channels_max = stream->channels_max;
1550 if (runtime->hw.formats)
1551 runtime->hw.formats &= formats & stream->formats;
1552 else
1553 runtime->hw.formats = formats & stream->formats;
1554 runtime->hw.rates = stream->rates;
1555 }
1556
1557 static u64 dpcm_runtime_base_format(struct snd_pcm_substream *substream)
1558 {
1559 struct snd_soc_pcm_runtime *fe = substream->private_data;
1560 struct snd_soc_dpcm *dpcm;
1561 u64 formats = ULLONG_MAX;
1562 int stream = substream->stream;
1563
1564 if (!fe->dai_link->dpcm_merged_format)
1565 return formats;
1566
1567 /*
1568 * It returns merged BE codec format
1569 * if FE want to use it (= dpcm_merged_format)
1570 */
1571
1572 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1573 struct snd_soc_pcm_runtime *be = dpcm->be;
1574 struct snd_soc_dai_driver *codec_dai_drv;
1575 struct snd_soc_pcm_stream *codec_stream;
1576 int i;
1577
1578 for (i = 0; i < be->num_codecs; i++) {
1579 codec_dai_drv = be->codec_dais[i]->driver;
1580 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1581 codec_stream = &codec_dai_drv->playback;
1582 else
1583 codec_stream = &codec_dai_drv->capture;
1584
1585 formats &= codec_stream->formats;
1586 }
1587 }
1588
1589 return formats;
1590 }
1591
1592 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1593 {
1594 struct snd_pcm_runtime *runtime = substream->runtime;
1595 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1596 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1597 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1598 u64 format = dpcm_runtime_base_format(substream);
1599
1600 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1601 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback, format);
1602 else
1603 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture, format);
1604 }
1605
1606 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1607
1608 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1609 * for avoiding the race with trigger callback.
1610 * If the state is unset and a trigger is pending while the previous operation,
1611 * process the pending trigger action here.
1612 */
1613 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1614 int stream, enum snd_soc_dpcm_update state)
1615 {
1616 struct snd_pcm_substream *substream =
1617 snd_soc_dpcm_get_substream(fe, stream);
1618
1619 snd_pcm_stream_lock_irq(substream);
1620 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1621 dpcm_fe_dai_do_trigger(substream,
1622 fe->dpcm[stream].trigger_pending - 1);
1623 fe->dpcm[stream].trigger_pending = 0;
1624 }
1625 fe->dpcm[stream].runtime_update = state;
1626 snd_pcm_stream_unlock_irq(substream);
1627 }
1628
1629 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1630 int stream)
1631 {
1632 struct snd_soc_dpcm *dpcm;
1633 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1634 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1635 int err;
1636
1637 /* apply symmetry for FE */
1638 if (soc_pcm_has_symmetry(fe_substream))
1639 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1640
1641 /* Symmetry only applies if we've got an active stream. */
1642 if (fe_cpu_dai->active) {
1643 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1644 if (err < 0)
1645 return err;
1646 }
1647
1648 /* apply symmetry for BE */
1649 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1650 struct snd_soc_pcm_runtime *be = dpcm->be;
1651 struct snd_pcm_substream *be_substream =
1652 snd_soc_dpcm_get_substream(be, stream);
1653 struct snd_soc_pcm_runtime *rtd = be_substream->private_data;
1654 int i;
1655
1656 if (soc_pcm_has_symmetry(be_substream))
1657 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1658
1659 /* Symmetry only applies if we've got an active stream. */
1660 if (rtd->cpu_dai->active) {
1661 err = soc_pcm_apply_symmetry(be_substream, rtd->cpu_dai);
1662 if (err < 0)
1663 return err;
1664 }
1665
1666 for (i = 0; i < rtd->num_codecs; i++) {
1667 if (rtd->codec_dais[i]->active) {
1668 err = soc_pcm_apply_symmetry(be_substream,
1669 rtd->codec_dais[i]);
1670 if (err < 0)
1671 return err;
1672 }
1673 }
1674 }
1675
1676 return 0;
1677 }
1678
1679 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1680 {
1681 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1682 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1683 int stream = fe_substream->stream, ret = 0;
1684
1685 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1686
1687 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1688 if (ret < 0) {
1689 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1690 goto be_err;
1691 }
1692
1693 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1694
1695 /* start the DAI frontend */
1696 ret = soc_pcm_open(fe_substream);
1697 if (ret < 0) {
1698 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1699 goto unwind;
1700 }
1701
1702 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1703
1704 dpcm_set_fe_runtime(fe_substream);
1705 snd_pcm_limit_hw_rates(runtime);
1706
1707 ret = dpcm_apply_symmetry(fe_substream, stream);
1708 if (ret < 0) {
1709 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1710 ret);
1711 goto unwind;
1712 }
1713
1714 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1715 return 0;
1716
1717 unwind:
1718 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1719 be_err:
1720 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1721 return ret;
1722 }
1723
1724 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1725 {
1726 struct snd_soc_dpcm *dpcm;
1727
1728 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1729 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1730
1731 struct snd_soc_pcm_runtime *be = dpcm->be;
1732 struct snd_pcm_substream *be_substream =
1733 snd_soc_dpcm_get_substream(be, stream);
1734
1735 /* is this op for this BE ? */
1736 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1737 continue;
1738
1739 if (be->dpcm[stream].users == 0)
1740 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1741 stream ? "capture" : "playback",
1742 be->dpcm[stream].state);
1743
1744 if (--be->dpcm[stream].users != 0)
1745 continue;
1746
1747 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1748 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1749 continue;
1750
1751 dev_dbg(be->dev, "ASoC: close BE %s\n",
1752 dpcm->fe->dai_link->name);
1753
1754 soc_pcm_close(be_substream);
1755 be_substream->runtime = NULL;
1756
1757 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1758 }
1759 return 0;
1760 }
1761
1762 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1763 {
1764 struct snd_soc_pcm_runtime *fe = substream->private_data;
1765 int stream = substream->stream;
1766
1767 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1768
1769 /* shutdown the BEs */
1770 dpcm_be_dai_shutdown(fe, substream->stream);
1771
1772 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1773
1774 /* now shutdown the frontend */
1775 soc_pcm_close(substream);
1776
1777 /* run the stream event for each BE */
1778 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1779
1780 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1781 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1782 return 0;
1783 }
1784
1785 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1786 {
1787 struct snd_soc_dpcm *dpcm;
1788
1789 /* only hw_params backends that are either sinks or sources
1790 * to this frontend DAI */
1791 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1792
1793 struct snd_soc_pcm_runtime *be = dpcm->be;
1794 struct snd_pcm_substream *be_substream =
1795 snd_soc_dpcm_get_substream(be, stream);
1796
1797 /* is this op for this BE ? */
1798 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1799 continue;
1800
1801 /* only free hw when no longer used - check all FEs */
1802 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1803 continue;
1804
1805 /* do not free hw if this BE is used by other FE */
1806 if (be->dpcm[stream].users > 1)
1807 continue;
1808
1809 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1810 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1811 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1812 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1813 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1814 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1815 continue;
1816
1817 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1818 dpcm->fe->dai_link->name);
1819
1820 soc_pcm_hw_free(be_substream);
1821
1822 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1823 }
1824
1825 return 0;
1826 }
1827
1828 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1829 {
1830 struct snd_soc_pcm_runtime *fe = substream->private_data;
1831 int err, stream = substream->stream;
1832
1833 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1834 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1835
1836 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1837
1838 /* call hw_free on the frontend */
1839 err = soc_pcm_hw_free(substream);
1840 if (err < 0)
1841 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
1842 fe->dai_link->name);
1843
1844 /* only hw_params backends that are either sinks or sources
1845 * to this frontend DAI */
1846 err = dpcm_be_dai_hw_free(fe, stream);
1847
1848 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1849 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1850
1851 mutex_unlock(&fe->card->mutex);
1852 return 0;
1853 }
1854
1855 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1856 {
1857 struct snd_soc_dpcm *dpcm;
1858 int ret;
1859
1860 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1861
1862 struct snd_soc_pcm_runtime *be = dpcm->be;
1863 struct snd_pcm_substream *be_substream =
1864 snd_soc_dpcm_get_substream(be, stream);
1865
1866 /* is this op for this BE ? */
1867 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1868 continue;
1869
1870 /* copy params for each dpcm */
1871 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1872 sizeof(struct snd_pcm_hw_params));
1873
1874 /* perform any hw_params fixups */
1875 if (be->dai_link->be_hw_params_fixup) {
1876 ret = be->dai_link->be_hw_params_fixup(be,
1877 &dpcm->hw_params);
1878 if (ret < 0) {
1879 dev_err(be->dev,
1880 "ASoC: hw_params BE fixup failed %d\n",
1881 ret);
1882 goto unwind;
1883 }
1884 }
1885
1886 /* only allow hw_params() if no connected FEs are running */
1887 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1888 continue;
1889
1890 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1891 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1892 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1893 continue;
1894
1895 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1896 dpcm->fe->dai_link->name);
1897
1898 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1899 if (ret < 0) {
1900 dev_err(dpcm->be->dev,
1901 "ASoC: hw_params BE failed %d\n", ret);
1902 goto unwind;
1903 }
1904
1905 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1906 }
1907 return 0;
1908
1909 unwind:
1910 /* disable any enabled and non active backends */
1911 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1912 struct snd_soc_pcm_runtime *be = dpcm->be;
1913 struct snd_pcm_substream *be_substream =
1914 snd_soc_dpcm_get_substream(be, stream);
1915
1916 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1917 continue;
1918
1919 /* only allow hw_free() if no connected FEs are running */
1920 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1921 continue;
1922
1923 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1924 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1925 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1926 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1927 continue;
1928
1929 soc_pcm_hw_free(be_substream);
1930 }
1931
1932 return ret;
1933 }
1934
1935 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1936 struct snd_pcm_hw_params *params)
1937 {
1938 struct snd_soc_pcm_runtime *fe = substream->private_data;
1939 int ret, stream = substream->stream;
1940
1941 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1942 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1943
1944 memcpy(&fe->dpcm[substream->stream].hw_params, params,
1945 sizeof(struct snd_pcm_hw_params));
1946 ret = dpcm_be_dai_hw_params(fe, substream->stream);
1947 if (ret < 0) {
1948 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
1949 goto out;
1950 }
1951
1952 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1953 fe->dai_link->name, params_rate(params),
1954 params_channels(params), params_format(params));
1955
1956 /* call hw_params on the frontend */
1957 ret = soc_pcm_hw_params(substream, params);
1958 if (ret < 0) {
1959 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
1960 dpcm_be_dai_hw_free(fe, stream);
1961 } else
1962 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1963
1964 out:
1965 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1966 mutex_unlock(&fe->card->mutex);
1967 return ret;
1968 }
1969
1970 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
1971 struct snd_pcm_substream *substream, int cmd)
1972 {
1973 int ret;
1974
1975 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
1976 dpcm->fe->dai_link->name, cmd);
1977
1978 ret = soc_pcm_trigger(substream, cmd);
1979 if (ret < 0)
1980 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
1981
1982 return ret;
1983 }
1984
1985 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
1986 int cmd)
1987 {
1988 struct snd_soc_dpcm *dpcm;
1989 int ret = 0;
1990
1991 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1992
1993 struct snd_soc_pcm_runtime *be = dpcm->be;
1994 struct snd_pcm_substream *be_substream =
1995 snd_soc_dpcm_get_substream(be, stream);
1996
1997 /* is this op for this BE ? */
1998 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1999 continue;
2000
2001 switch (cmd) {
2002 case SNDRV_PCM_TRIGGER_START:
2003 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2004 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2005 continue;
2006
2007 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2008 if (ret)
2009 return ret;
2010
2011 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2012 break;
2013 case SNDRV_PCM_TRIGGER_RESUME:
2014 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2015 continue;
2016
2017 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2018 if (ret)
2019 return ret;
2020
2021 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2022 break;
2023 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2024 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2025 continue;
2026
2027 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2028 if (ret)
2029 return ret;
2030
2031 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2032 break;
2033 case SNDRV_PCM_TRIGGER_STOP:
2034 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2035 continue;
2036
2037 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2038 continue;
2039
2040 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2041 if (ret)
2042 return ret;
2043
2044 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2045 break;
2046 case SNDRV_PCM_TRIGGER_SUSPEND:
2047 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2048 continue;
2049
2050 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2051 continue;
2052
2053 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2054 if (ret)
2055 return ret;
2056
2057 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2058 break;
2059 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2060 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2061 continue;
2062
2063 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2064 continue;
2065
2066 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2067 if (ret)
2068 return ret;
2069
2070 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2071 break;
2072 }
2073 }
2074
2075 return ret;
2076 }
2077 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2078
2079 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2080 {
2081 struct snd_soc_pcm_runtime *fe = substream->private_data;
2082 int stream = substream->stream, ret;
2083 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2084
2085 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2086
2087 switch (trigger) {
2088 case SND_SOC_DPCM_TRIGGER_PRE:
2089 /* call trigger on the frontend before the backend. */
2090
2091 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2092 fe->dai_link->name, cmd);
2093
2094 ret = soc_pcm_trigger(substream, cmd);
2095 if (ret < 0) {
2096 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2097 goto out;
2098 }
2099
2100 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2101 break;
2102 case SND_SOC_DPCM_TRIGGER_POST:
2103 /* call trigger on the frontend after the backend. */
2104
2105 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2106 if (ret < 0) {
2107 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2108 goto out;
2109 }
2110
2111 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2112 fe->dai_link->name, cmd);
2113
2114 ret = soc_pcm_trigger(substream, cmd);
2115 break;
2116 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2117 /* bespoke trigger() - handles both FE and BEs */
2118
2119 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2120 fe->dai_link->name, cmd);
2121
2122 ret = soc_pcm_bespoke_trigger(substream, cmd);
2123 if (ret < 0) {
2124 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2125 goto out;
2126 }
2127 break;
2128 default:
2129 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2130 fe->dai_link->name);
2131 ret = -EINVAL;
2132 goto out;
2133 }
2134
2135 switch (cmd) {
2136 case SNDRV_PCM_TRIGGER_START:
2137 case SNDRV_PCM_TRIGGER_RESUME:
2138 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2139 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2140 break;
2141 case SNDRV_PCM_TRIGGER_STOP:
2142 case SNDRV_PCM_TRIGGER_SUSPEND:
2143 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2144 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2145 break;
2146 }
2147
2148 out:
2149 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2150 return ret;
2151 }
2152
2153 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2154 {
2155 struct snd_soc_pcm_runtime *fe = substream->private_data;
2156 int stream = substream->stream;
2157
2158 /* if FE's runtime_update is already set, we're in race;
2159 * process this trigger later at exit
2160 */
2161 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2162 fe->dpcm[stream].trigger_pending = cmd + 1;
2163 return 0; /* delayed, assuming it's successful */
2164 }
2165
2166 /* we're alone, let's trigger */
2167 return dpcm_fe_dai_do_trigger(substream, cmd);
2168 }
2169
2170 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2171 {
2172 struct snd_soc_dpcm *dpcm;
2173 int ret = 0;
2174
2175 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2176
2177 struct snd_soc_pcm_runtime *be = dpcm->be;
2178 struct snd_pcm_substream *be_substream =
2179 snd_soc_dpcm_get_substream(be, stream);
2180
2181 /* is this op for this BE ? */
2182 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2183 continue;
2184
2185 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2186 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2187 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2188 continue;
2189
2190 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2191 dpcm->fe->dai_link->name);
2192
2193 ret = soc_pcm_prepare(be_substream);
2194 if (ret < 0) {
2195 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2196 ret);
2197 break;
2198 }
2199
2200 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2201 }
2202 return ret;
2203 }
2204
2205 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2206 {
2207 struct snd_soc_pcm_runtime *fe = substream->private_data;
2208 int stream = substream->stream, ret = 0;
2209
2210 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2211
2212 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2213
2214 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2215
2216 /* there is no point preparing this FE if there are no BEs */
2217 if (list_empty(&fe->dpcm[stream].be_clients)) {
2218 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2219 fe->dai_link->name);
2220 ret = -EINVAL;
2221 goto out;
2222 }
2223
2224 ret = dpcm_be_dai_prepare(fe, substream->stream);
2225 if (ret < 0)
2226 goto out;
2227
2228 /* call prepare on the frontend */
2229 ret = soc_pcm_prepare(substream);
2230 if (ret < 0) {
2231 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2232 fe->dai_link->name);
2233 goto out;
2234 }
2235
2236 /* run the stream event for each BE */
2237 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2238 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2239
2240 out:
2241 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2242 mutex_unlock(&fe->card->mutex);
2243
2244 return ret;
2245 }
2246
2247 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2248 unsigned int cmd, void *arg)
2249 {
2250 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2251 struct snd_soc_platform *platform = rtd->platform;
2252
2253 if (platform->driver->ops && platform->driver->ops->ioctl)
2254 return platform->driver->ops->ioctl(substream, cmd, arg);
2255 return snd_pcm_lib_ioctl(substream, cmd, arg);
2256 }
2257
2258 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2259 {
2260 struct snd_pcm_substream *substream =
2261 snd_soc_dpcm_get_substream(fe, stream);
2262 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2263 int err;
2264
2265 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2266 stream ? "capture" : "playback", fe->dai_link->name);
2267
2268 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2269 /* call bespoke trigger - FE takes care of all BE triggers */
2270 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2271 fe->dai_link->name);
2272
2273 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2274 if (err < 0)
2275 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2276 } else {
2277 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2278 fe->dai_link->name);
2279
2280 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2281 if (err < 0)
2282 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2283 }
2284
2285 err = dpcm_be_dai_hw_free(fe, stream);
2286 if (err < 0)
2287 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2288
2289 err = dpcm_be_dai_shutdown(fe, stream);
2290 if (err < 0)
2291 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2292
2293 /* run the stream event for each BE */
2294 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2295
2296 return 0;
2297 }
2298
2299 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2300 {
2301 struct snd_pcm_substream *substream =
2302 snd_soc_dpcm_get_substream(fe, stream);
2303 struct snd_soc_dpcm *dpcm;
2304 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2305 int ret;
2306
2307 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2308 stream ? "capture" : "playback", fe->dai_link->name);
2309
2310 /* Only start the BE if the FE is ready */
2311 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2312 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2313 return -EINVAL;
2314
2315 /* startup must always be called for new BEs */
2316 ret = dpcm_be_dai_startup(fe, stream);
2317 if (ret < 0)
2318 goto disconnect;
2319
2320 /* keep going if FE state is > open */
2321 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2322 return 0;
2323
2324 ret = dpcm_be_dai_hw_params(fe, stream);
2325 if (ret < 0)
2326 goto close;
2327
2328 /* keep going if FE state is > hw_params */
2329 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2330 return 0;
2331
2332
2333 ret = dpcm_be_dai_prepare(fe, stream);
2334 if (ret < 0)
2335 goto hw_free;
2336
2337 /* run the stream event for each BE */
2338 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2339
2340 /* keep going if FE state is > prepare */
2341 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2342 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2343 return 0;
2344
2345 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2346 /* call trigger on the frontend - FE takes care of all BE triggers */
2347 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2348 fe->dai_link->name);
2349
2350 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2351 if (ret < 0) {
2352 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2353 goto hw_free;
2354 }
2355 } else {
2356 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2357 fe->dai_link->name);
2358
2359 ret = dpcm_be_dai_trigger(fe, stream,
2360 SNDRV_PCM_TRIGGER_START);
2361 if (ret < 0) {
2362 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2363 goto hw_free;
2364 }
2365 }
2366
2367 return 0;
2368
2369 hw_free:
2370 dpcm_be_dai_hw_free(fe, stream);
2371 close:
2372 dpcm_be_dai_shutdown(fe, stream);
2373 disconnect:
2374 /* disconnect any non started BEs */
2375 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2376 struct snd_soc_pcm_runtime *be = dpcm->be;
2377 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2378 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2379 }
2380
2381 return ret;
2382 }
2383
2384 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2385 {
2386 int ret;
2387
2388 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2389 ret = dpcm_run_update_startup(fe, stream);
2390 if (ret < 0)
2391 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2392 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2393
2394 return ret;
2395 }
2396
2397 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2398 {
2399 int ret;
2400
2401 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2402 ret = dpcm_run_update_shutdown(fe, stream);
2403 if (ret < 0)
2404 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2405 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2406
2407 return ret;
2408 }
2409
2410 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2411 * any DAI links.
2412 */
2413 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2414 {
2415 struct snd_soc_pcm_runtime *fe;
2416 int old, new, paths;
2417
2418 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2419 list_for_each_entry(fe, &card->rtd_list, list) {
2420 struct snd_soc_dapm_widget_list *list;
2421
2422 /* make sure link is FE */
2423 if (!fe->dai_link->dynamic)
2424 continue;
2425
2426 /* only check active links */
2427 if (!fe->cpu_dai->active)
2428 continue;
2429
2430 /* DAPM sync will call this to update DSP paths */
2431 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
2432 fe->dai_link->name);
2433
2434 /* skip if FE doesn't have playback capability */
2435 if (!fe->cpu_dai->driver->playback.channels_min
2436 || !fe->codec_dai->driver->playback.channels_min)
2437 goto capture;
2438
2439 /* skip if FE isn't currently playing */
2440 if (!fe->cpu_dai->playback_active
2441 || !fe->codec_dai->playback_active)
2442 goto capture;
2443
2444 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2445 if (paths < 0) {
2446 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2447 fe->dai_link->name, "playback");
2448 mutex_unlock(&card->mutex);
2449 return paths;
2450 }
2451
2452 /* update any new playback paths */
2453 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
2454 if (new) {
2455 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2456 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2457 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2458 }
2459
2460 /* update any old playback paths */
2461 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
2462 if (old) {
2463 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2464 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2465 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2466 }
2467
2468 dpcm_path_put(&list);
2469 capture:
2470 /* skip if FE doesn't have capture capability */
2471 if (!fe->cpu_dai->driver->capture.channels_min
2472 || !fe->codec_dai->driver->capture.channels_min)
2473 continue;
2474
2475 /* skip if FE isn't currently capturing */
2476 if (!fe->cpu_dai->capture_active
2477 || !fe->codec_dai->capture_active)
2478 continue;
2479
2480 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2481 if (paths < 0) {
2482 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2483 fe->dai_link->name, "capture");
2484 mutex_unlock(&card->mutex);
2485 return paths;
2486 }
2487
2488 /* update any new capture paths */
2489 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
2490 if (new) {
2491 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2492 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2493 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2494 }
2495
2496 /* update any old capture paths */
2497 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
2498 if (old) {
2499 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2500 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2501 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2502 }
2503
2504 dpcm_path_put(&list);
2505 }
2506
2507 mutex_unlock(&card->mutex);
2508 return 0;
2509 }
2510 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2511 {
2512 struct snd_soc_dpcm *dpcm;
2513 struct list_head *clients =
2514 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
2515
2516 list_for_each_entry(dpcm, clients, list_be) {
2517
2518 struct snd_soc_pcm_runtime *be = dpcm->be;
2519 int i;
2520
2521 if (be->dai_link->ignore_suspend)
2522 continue;
2523
2524 for (i = 0; i < be->num_codecs; i++) {
2525 struct snd_soc_dai *dai = be->codec_dais[i];
2526 struct snd_soc_dai_driver *drv = dai->driver;
2527
2528 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2529 be->dai_link->name);
2530
2531 if (drv->ops && drv->ops->digital_mute &&
2532 dai->playback_active)
2533 drv->ops->digital_mute(dai, mute);
2534 }
2535 }
2536
2537 return 0;
2538 }
2539
2540 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2541 {
2542 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2543 struct snd_soc_dpcm *dpcm;
2544 struct snd_soc_dapm_widget_list *list;
2545 int ret;
2546 int stream = fe_substream->stream;
2547
2548 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2549 fe->dpcm[stream].runtime = fe_substream->runtime;
2550
2551 ret = dpcm_path_get(fe, stream, &list);
2552 if (ret < 0) {
2553 mutex_unlock(&fe->card->mutex);
2554 return ret;
2555 } else if (ret == 0) {
2556 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2557 fe->dai_link->name, stream ? "capture" : "playback");
2558 }
2559
2560 /* calculate valid and active FE <-> BE dpcms */
2561 dpcm_process_paths(fe, stream, &list, 1);
2562
2563 ret = dpcm_fe_dai_startup(fe_substream);
2564 if (ret < 0) {
2565 /* clean up all links */
2566 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2567 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2568
2569 dpcm_be_disconnect(fe, stream);
2570 fe->dpcm[stream].runtime = NULL;
2571 }
2572
2573 dpcm_clear_pending_state(fe, stream);
2574 dpcm_path_put(&list);
2575 mutex_unlock(&fe->card->mutex);
2576 return ret;
2577 }
2578
2579 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2580 {
2581 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2582 struct snd_soc_dpcm *dpcm;
2583 int stream = fe_substream->stream, ret;
2584
2585 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2586 ret = dpcm_fe_dai_shutdown(fe_substream);
2587
2588 /* mark FE's links ready to prune */
2589 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2590 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2591
2592 dpcm_be_disconnect(fe, stream);
2593
2594 fe->dpcm[stream].runtime = NULL;
2595 mutex_unlock(&fe->card->mutex);
2596 return ret;
2597 }
2598
2599 /* create a new pcm */
2600 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2601 {
2602 struct snd_soc_platform *platform = rtd->platform;
2603 struct snd_soc_dai *codec_dai;
2604 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2605 struct snd_pcm *pcm;
2606 char new_name[64];
2607 int ret = 0, playback = 0, capture = 0;
2608 int i;
2609
2610 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2611 playback = rtd->dai_link->dpcm_playback;
2612 capture = rtd->dai_link->dpcm_capture;
2613 } else {
2614 for (i = 0; i < rtd->num_codecs; i++) {
2615 codec_dai = rtd->codec_dais[i];
2616 if (codec_dai->driver->playback.channels_min)
2617 playback = 1;
2618 if (codec_dai->driver->capture.channels_min)
2619 capture = 1;
2620 }
2621
2622 capture = capture && cpu_dai->driver->capture.channels_min;
2623 playback = playback && cpu_dai->driver->playback.channels_min;
2624 }
2625
2626 if (rtd->dai_link->playback_only) {
2627 playback = 1;
2628 capture = 0;
2629 }
2630
2631 if (rtd->dai_link->capture_only) {
2632 playback = 0;
2633 capture = 1;
2634 }
2635
2636 /* create the PCM */
2637 if (rtd->dai_link->no_pcm) {
2638 snprintf(new_name, sizeof(new_name), "(%s)",
2639 rtd->dai_link->stream_name);
2640
2641 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2642 playback, capture, &pcm);
2643 } else {
2644 if (rtd->dai_link->dynamic)
2645 snprintf(new_name, sizeof(new_name), "%s (*)",
2646 rtd->dai_link->stream_name);
2647 else
2648 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2649 rtd->dai_link->stream_name,
2650 (rtd->num_codecs > 1) ?
2651 "multicodec" : rtd->codec_dai->name, num);
2652
2653 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2654 capture, &pcm);
2655 }
2656 if (ret < 0) {
2657 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2658 rtd->dai_link->name);
2659 return ret;
2660 }
2661 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2662
2663 /* DAPM dai link stream work */
2664 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2665
2666 pcm->nonatomic = rtd->dai_link->nonatomic;
2667 rtd->pcm = pcm;
2668 pcm->private_data = rtd;
2669
2670 if (rtd->dai_link->no_pcm) {
2671 if (playback)
2672 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2673 if (capture)
2674 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2675 goto out;
2676 }
2677
2678 /* ASoC PCM operations */
2679 if (rtd->dai_link->dynamic) {
2680 rtd->ops.open = dpcm_fe_dai_open;
2681 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2682 rtd->ops.prepare = dpcm_fe_dai_prepare;
2683 rtd->ops.trigger = dpcm_fe_dai_trigger;
2684 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2685 rtd->ops.close = dpcm_fe_dai_close;
2686 rtd->ops.pointer = soc_pcm_pointer;
2687 rtd->ops.ioctl = soc_pcm_ioctl;
2688 } else {
2689 rtd->ops.open = soc_pcm_open;
2690 rtd->ops.hw_params = soc_pcm_hw_params;
2691 rtd->ops.prepare = soc_pcm_prepare;
2692 rtd->ops.trigger = soc_pcm_trigger;
2693 rtd->ops.hw_free = soc_pcm_hw_free;
2694 rtd->ops.close = soc_pcm_close;
2695 rtd->ops.pointer = soc_pcm_pointer;
2696 rtd->ops.ioctl = soc_pcm_ioctl;
2697 }
2698
2699 if (platform->driver->ops) {
2700 rtd->ops.ack = platform->driver->ops->ack;
2701 rtd->ops.copy = platform->driver->ops->copy;
2702 rtd->ops.silence = platform->driver->ops->silence;
2703 rtd->ops.page = platform->driver->ops->page;
2704 rtd->ops.mmap = platform->driver->ops->mmap;
2705 }
2706
2707 if (playback)
2708 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2709
2710 if (capture)
2711 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2712
2713 if (platform->driver->pcm_new) {
2714 ret = platform->driver->pcm_new(rtd);
2715 if (ret < 0) {
2716 dev_err(platform->dev,
2717 "ASoC: pcm constructor failed: %d\n",
2718 ret);
2719 return ret;
2720 }
2721 }
2722
2723 pcm->private_free = platform->driver->pcm_free;
2724 out:
2725 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
2726 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
2727 cpu_dai->name);
2728 return ret;
2729 }
2730
2731 /* is the current PCM operation for this FE ? */
2732 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2733 {
2734 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2735 return 1;
2736 return 0;
2737 }
2738 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2739
2740 /* is the current PCM operation for this BE ? */
2741 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2742 struct snd_soc_pcm_runtime *be, int stream)
2743 {
2744 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2745 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2746 be->dpcm[stream].runtime_update))
2747 return 1;
2748 return 0;
2749 }
2750 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2751
2752 /* get the substream for this BE */
2753 struct snd_pcm_substream *
2754 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2755 {
2756 return be->pcm->streams[stream].substream;
2757 }
2758 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2759
2760 /* get the BE runtime state */
2761 enum snd_soc_dpcm_state
2762 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2763 {
2764 return be->dpcm[stream].state;
2765 }
2766 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
2767
2768 /* set the BE runtime state */
2769 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
2770 int stream, enum snd_soc_dpcm_state state)
2771 {
2772 be->dpcm[stream].state = state;
2773 }
2774 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
2775
2776 /*
2777 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2778 * are not running, paused or suspended for the specified stream direction.
2779 */
2780 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2781 struct snd_soc_pcm_runtime *be, int stream)
2782 {
2783 struct snd_soc_dpcm *dpcm;
2784 int state;
2785
2786 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2787
2788 if (dpcm->fe == fe)
2789 continue;
2790
2791 state = dpcm->fe->dpcm[stream].state;
2792 if (state == SND_SOC_DPCM_STATE_START ||
2793 state == SND_SOC_DPCM_STATE_PAUSED ||
2794 state == SND_SOC_DPCM_STATE_SUSPEND)
2795 return 0;
2796 }
2797
2798 /* it's safe to free/stop this BE DAI */
2799 return 1;
2800 }
2801 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2802
2803 /*
2804 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2805 * running, paused or suspended for the specified stream direction.
2806 */
2807 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2808 struct snd_soc_pcm_runtime *be, int stream)
2809 {
2810 struct snd_soc_dpcm *dpcm;
2811 int state;
2812
2813 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2814
2815 if (dpcm->fe == fe)
2816 continue;
2817
2818 state = dpcm->fe->dpcm[stream].state;
2819 if (state == SND_SOC_DPCM_STATE_START ||
2820 state == SND_SOC_DPCM_STATE_PAUSED ||
2821 state == SND_SOC_DPCM_STATE_SUSPEND ||
2822 state == SND_SOC_DPCM_STATE_PREPARE)
2823 return 0;
2824 }
2825
2826 /* it's safe to change hw_params */
2827 return 1;
2828 }
2829 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2830
2831 int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
2832 int cmd, struct snd_soc_platform *platform)
2833 {
2834 if (platform->driver->ops && platform->driver->ops->trigger)
2835 return platform->driver->ops->trigger(substream, cmd);
2836 return 0;
2837 }
2838 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger);
2839
2840 #ifdef CONFIG_DEBUG_FS
2841 static char *dpcm_state_string(enum snd_soc_dpcm_state state)
2842 {
2843 switch (state) {
2844 case SND_SOC_DPCM_STATE_NEW:
2845 return "new";
2846 case SND_SOC_DPCM_STATE_OPEN:
2847 return "open";
2848 case SND_SOC_DPCM_STATE_HW_PARAMS:
2849 return "hw_params";
2850 case SND_SOC_DPCM_STATE_PREPARE:
2851 return "prepare";
2852 case SND_SOC_DPCM_STATE_START:
2853 return "start";
2854 case SND_SOC_DPCM_STATE_STOP:
2855 return "stop";
2856 case SND_SOC_DPCM_STATE_SUSPEND:
2857 return "suspend";
2858 case SND_SOC_DPCM_STATE_PAUSED:
2859 return "paused";
2860 case SND_SOC_DPCM_STATE_HW_FREE:
2861 return "hw_free";
2862 case SND_SOC_DPCM_STATE_CLOSE:
2863 return "close";
2864 }
2865
2866 return "unknown";
2867 }
2868
2869 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2870 int stream, char *buf, size_t size)
2871 {
2872 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2873 struct snd_soc_dpcm *dpcm;
2874 ssize_t offset = 0;
2875
2876 /* FE state */
2877 offset += snprintf(buf + offset, size - offset,
2878 "[%s - %s]\n", fe->dai_link->name,
2879 stream ? "Capture" : "Playback");
2880
2881 offset += snprintf(buf + offset, size - offset, "State: %s\n",
2882 dpcm_state_string(fe->dpcm[stream].state));
2883
2884 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2885 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2886 offset += snprintf(buf + offset, size - offset,
2887 "Hardware Params: "
2888 "Format = %s, Channels = %d, Rate = %d\n",
2889 snd_pcm_format_name(params_format(params)),
2890 params_channels(params),
2891 params_rate(params));
2892
2893 /* BEs state */
2894 offset += snprintf(buf + offset, size - offset, "Backends:\n");
2895
2896 if (list_empty(&fe->dpcm[stream].be_clients)) {
2897 offset += snprintf(buf + offset, size - offset,
2898 " No active DSP links\n");
2899 goto out;
2900 }
2901
2902 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2903 struct snd_soc_pcm_runtime *be = dpcm->be;
2904 params = &dpcm->hw_params;
2905
2906 offset += snprintf(buf + offset, size - offset,
2907 "- %s\n", be->dai_link->name);
2908
2909 offset += snprintf(buf + offset, size - offset,
2910 " State: %s\n",
2911 dpcm_state_string(be->dpcm[stream].state));
2912
2913 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2914 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2915 offset += snprintf(buf + offset, size - offset,
2916 " Hardware Params: "
2917 "Format = %s, Channels = %d, Rate = %d\n",
2918 snd_pcm_format_name(params_format(params)),
2919 params_channels(params),
2920 params_rate(params));
2921 }
2922
2923 out:
2924 return offset;
2925 }
2926
2927 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
2928 size_t count, loff_t *ppos)
2929 {
2930 struct snd_soc_pcm_runtime *fe = file->private_data;
2931 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
2932 char *buf;
2933
2934 buf = kmalloc(out_count, GFP_KERNEL);
2935 if (!buf)
2936 return -ENOMEM;
2937
2938 if (fe->cpu_dai->driver->playback.channels_min)
2939 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
2940 buf + offset, out_count - offset);
2941
2942 if (fe->cpu_dai->driver->capture.channels_min)
2943 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
2944 buf + offset, out_count - offset);
2945
2946 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
2947
2948 kfree(buf);
2949 return ret;
2950 }
2951
2952 static const struct file_operations dpcm_state_fops = {
2953 .open = simple_open,
2954 .read = dpcm_state_read_file,
2955 .llseek = default_llseek,
2956 };
2957
2958 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
2959 {
2960 if (!rtd->dai_link)
2961 return;
2962
2963 if (!rtd->card->debugfs_card_root)
2964 return;
2965
2966 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
2967 rtd->card->debugfs_card_root);
2968 if (!rtd->debugfs_dpcm_root) {
2969 dev_dbg(rtd->dev,
2970 "ASoC: Failed to create dpcm debugfs directory %s\n",
2971 rtd->dai_link->name);
2972 return;
2973 }
2974
2975 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
2976 rtd->debugfs_dpcm_root,
2977 rtd, &dpcm_state_fops);
2978 }
2979 #endif
Linux kernel - Deliverables
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