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 */
snd_soc_dai_stream_valid(struct snd_soc_dai * dai,int stream)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 */
snd_soc_runtime_activate(struct snd_soc_pcm_runtime * rtd,int stream)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 */
snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime * rtd,int stream)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 */
snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime * rtd)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 */
snd_soc_set_runtime_hwparams(struct snd_pcm_substream * substream,const struct snd_pcm_hardware * hw)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. */
dpcm_dapm_stream_event(struct snd_soc_pcm_runtime * fe,int dir,int event)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
soc_pcm_apply_symmetry(struct snd_pcm_substream * substream,struct snd_soc_dai * soc_dai)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
soc_pcm_params_symmetry(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)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
soc_pcm_has_symmetry(struct snd_pcm_substream * substream)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
soc_pcm_set_msb(struct snd_pcm_substream * substream,int bits)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
soc_pcm_apply_msb(struct snd_pcm_substream * substream)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
soc_pcm_init_runtime_hw(struct snd_pcm_substream * substream)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 */
soc_pcm_open(struct snd_pcm_substream * substream)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_put(platform->dev);
603 for (i = 0; i < rtd->num_codecs; i++)
604 pm_runtime_put(rtd->codec_dais[i]->dev);
605 pm_runtime_put(cpu_dai->dev);
606 for (i = 0; i < rtd->num_codecs; i++) {
607 if (!rtd->codec_dais[i]->active)
608 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
609 }
610 if (!cpu_dai->active)
611 pinctrl_pm_select_sleep_state(cpu_dai->dev);
612
613 return ret;
614 }
615
616 /*
617 * Power down the audio subsystem pmdown_time msecs after close is called.
618 * This is to ensure there are no pops or clicks in between any music tracks
619 * due to DAPM power cycling.
620 */
close_delayed_work(struct work_struct * work)621 static void close_delayed_work(struct work_struct *work)
622 {
623 struct snd_soc_pcm_runtime *rtd =
624 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
625 struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
626
627 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
628
629 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
630 codec_dai->driver->playback.stream_name,
631 codec_dai->playback_active ? "active" : "inactive",
632 rtd->pop_wait ? "yes" : "no");
633
634 /* are we waiting on this codec DAI stream */
635 if (rtd->pop_wait == 1) {
636 rtd->pop_wait = 0;
637 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
638 SND_SOC_DAPM_STREAM_STOP);
639 }
640
641 mutex_unlock(&rtd->pcm_mutex);
642 }
643
644 /*
645 * Called by ALSA when a PCM substream is closed. Private data can be
646 * freed here. The cpu DAI, codec DAI, machine and platform are also
647 * shutdown.
648 */
soc_pcm_close(struct snd_pcm_substream * substream)649 static int soc_pcm_close(struct snd_pcm_substream *substream)
650 {
651 struct snd_soc_pcm_runtime *rtd = substream->private_data;
652 struct snd_soc_platform *platform = rtd->platform;
653 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
654 struct snd_soc_dai *codec_dai;
655 int i;
656
657 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
658
659 snd_soc_runtime_deactivate(rtd, substream->stream);
660
661 /* clear the corresponding DAIs rate when inactive */
662 if (!cpu_dai->active)
663 cpu_dai->rate = 0;
664
665 for (i = 0; i < rtd->num_codecs; i++) {
666 codec_dai = rtd->codec_dais[i];
667 if (!codec_dai->active)
668 codec_dai->rate = 0;
669 }
670
671 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
672
673 if (cpu_dai->driver->ops->shutdown)
674 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
675
676 for (i = 0; i < rtd->num_codecs; i++) {
677 codec_dai = rtd->codec_dais[i];
678 if (codec_dai->driver->ops->shutdown)
679 codec_dai->driver->ops->shutdown(substream, codec_dai);
680 }
681
682 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
683 rtd->dai_link->ops->shutdown(substream);
684
685 if (platform->driver->ops && platform->driver->ops->close)
686 platform->driver->ops->close(substream);
687
688 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
689 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
690 /* powered down playback stream now */
691 snd_soc_dapm_stream_event(rtd,
692 SNDRV_PCM_STREAM_PLAYBACK,
693 SND_SOC_DAPM_STREAM_STOP);
694 } else {
695 /* start delayed pop wq here for playback streams */
696 rtd->pop_wait = 1;
697 queue_delayed_work(system_power_efficient_wq,
698 &rtd->delayed_work,
699 msecs_to_jiffies(rtd->pmdown_time));
700 }
701 } else {
702 /* capture streams can be powered down now */
703 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
704 SND_SOC_DAPM_STREAM_STOP);
705 }
706
707 mutex_unlock(&rtd->pcm_mutex);
708
709 pm_runtime_put(platform->dev);
710 for (i = 0; i < rtd->num_codecs; i++)
711 pm_runtime_put(rtd->codec_dais[i]->dev);
712 pm_runtime_put(cpu_dai->dev);
713 for (i = 0; i < rtd->num_codecs; i++) {
714 if (!rtd->codec_dais[i]->active)
715 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
716 }
717 if (!cpu_dai->active)
718 pinctrl_pm_select_sleep_state(cpu_dai->dev);
719
720 return 0;
721 }
722
723 /*
724 * Called by ALSA when the PCM substream is prepared, can set format, sample
725 * rate, etc. This function is non atomic and can be called multiple times,
726 * it can refer to the runtime info.
727 */
soc_pcm_prepare(struct snd_pcm_substream * substream)728 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
729 {
730 struct snd_soc_pcm_runtime *rtd = substream->private_data;
731 struct snd_soc_platform *platform = rtd->platform;
732 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
733 struct snd_soc_dai *codec_dai;
734 int i, ret = 0;
735
736 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
737
738 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
739 ret = rtd->dai_link->ops->prepare(substream);
740 if (ret < 0) {
741 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
742 " %d\n", ret);
743 goto out;
744 }
745 }
746
747 if (platform->driver->ops && platform->driver->ops->prepare) {
748 ret = platform->driver->ops->prepare(substream);
749 if (ret < 0) {
750 dev_err(platform->dev, "ASoC: platform prepare error:"
751 " %d\n", ret);
752 goto out;
753 }
754 }
755
756 for (i = 0; i < rtd->num_codecs; i++) {
757 codec_dai = rtd->codec_dais[i];
758 if (codec_dai->driver->ops && codec_dai->driver->ops->prepare) {
759 ret = codec_dai->driver->ops->prepare(substream,
760 codec_dai);
761 if (ret < 0) {
762 dev_err(codec_dai->dev,
763 "ASoC: codec DAI prepare error: %d\n",
764 ret);
765 goto out;
766 }
767 }
768 }
769
770 if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) {
771 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
772 if (ret < 0) {
773 dev_err(cpu_dai->dev,
774 "ASoC: cpu DAI prepare error: %d\n", ret);
775 goto out;
776 }
777 }
778
779 /* cancel any delayed stream shutdown that is pending */
780 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
781 rtd->pop_wait) {
782 rtd->pop_wait = 0;
783 cancel_delayed_work(&rtd->delayed_work);
784 }
785
786 snd_soc_dapm_stream_event(rtd, substream->stream,
787 SND_SOC_DAPM_STREAM_START);
788
789 for (i = 0; i < rtd->num_codecs; i++)
790 snd_soc_dai_digital_mute(rtd->codec_dais[i], 0,
791 substream->stream);
792 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
793
794 out:
795 mutex_unlock(&rtd->pcm_mutex);
796 return ret;
797 }
798
soc_pcm_codec_params_fixup(struct snd_pcm_hw_params * params,unsigned int mask)799 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
800 unsigned int mask)
801 {
802 struct snd_interval *interval;
803 int channels = hweight_long(mask);
804
805 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
806 interval->min = channels;
807 interval->max = channels;
808 }
809
soc_dai_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)810 int soc_dai_hw_params(struct snd_pcm_substream *substream,
811 struct snd_pcm_hw_params *params,
812 struct snd_soc_dai *dai)
813 {
814 int ret;
815
816 if (dai->driver->ops && dai->driver->ops->hw_params) {
817 ret = dai->driver->ops->hw_params(substream, params, dai);
818 if (ret < 0) {
819 dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
820 dai->name, ret);
821 return ret;
822 }
823 }
824
825 return 0;
826 }
827
828 /*
829 * Called by ALSA when the hardware params are set by application. This
830 * function can also be called multiple times and can allocate buffers
831 * (using snd_pcm_lib_* ). It's non-atomic.
832 */
soc_pcm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)833 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
834 struct snd_pcm_hw_params *params)
835 {
836 struct snd_soc_pcm_runtime *rtd = substream->private_data;
837 struct snd_soc_platform *platform = rtd->platform;
838 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
839 int i, ret = 0;
840
841 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
842
843 ret = soc_pcm_params_symmetry(substream, params);
844 if (ret)
845 goto out;
846
847 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
848 ret = rtd->dai_link->ops->hw_params(substream, params);
849 if (ret < 0) {
850 dev_err(rtd->card->dev, "ASoC: machine hw_params"
851 " failed: %d\n", ret);
852 goto out;
853 }
854 }
855
856 for (i = 0; i < rtd->num_codecs; i++) {
857 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
858 struct snd_pcm_hw_params codec_params;
859
860 /*
861 * Skip CODECs which don't support the current stream type,
862 * the idea being that if a CODEC is not used for the currently
863 * set up transfer direction, it should not need to be
864 * configured, especially since the configuration used might
865 * not even be supported by that CODEC. There may be cases
866 * however where a CODEC needs to be set up although it is
867 * actually not being used for the transfer, e.g. if a
868 * capture-only CODEC is acting as an LRCLK and/or BCLK master
869 * for the DAI link including a playback-only CODEC.
870 * If this becomes necessary, we will have to augment the
871 * machine driver setup with information on how to act, so
872 * we can do the right thing here.
873 */
874 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
875 continue;
876
877 /* copy params for each codec */
878 codec_params = *params;
879
880 /* fixup params based on TDM slot masks */
881 if (codec_dai->tx_mask)
882 soc_pcm_codec_params_fixup(&codec_params,
883 codec_dai->tx_mask);
884 if (codec_dai->rx_mask)
885 soc_pcm_codec_params_fixup(&codec_params,
886 codec_dai->rx_mask);
887
888 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
889 if(ret < 0)
890 goto codec_err;
891
892 codec_dai->rate = params_rate(&codec_params);
893 codec_dai->channels = params_channels(&codec_params);
894 codec_dai->sample_bits = snd_pcm_format_physical_width(
895 params_format(&codec_params));
896 }
897
898 ret = soc_dai_hw_params(substream, params, cpu_dai);
899 if (ret < 0)
900 goto interface_err;
901
902 if (platform->driver->ops && platform->driver->ops->hw_params) {
903 ret = platform->driver->ops->hw_params(substream, params);
904 if (ret < 0) {
905 dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
906 platform->component.name, ret);
907 goto platform_err;
908 }
909 }
910
911 /* store the parameters for each DAIs */
912 cpu_dai->rate = params_rate(params);
913 cpu_dai->channels = params_channels(params);
914 cpu_dai->sample_bits =
915 snd_pcm_format_physical_width(params_format(params));
916
917 out:
918 mutex_unlock(&rtd->pcm_mutex);
919 return ret;
920
921 platform_err:
922 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
923 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
924
925 interface_err:
926 i = rtd->num_codecs;
927
928 codec_err:
929 while (--i >= 0) {
930 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
931 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
932 codec_dai->driver->ops->hw_free(substream, codec_dai);
933 codec_dai->rate = 0;
934 }
935
936 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
937 rtd->dai_link->ops->hw_free(substream);
938
939 mutex_unlock(&rtd->pcm_mutex);
940 return ret;
941 }
942
943 /*
944 * Frees resources allocated by hw_params, can be called multiple times
945 */
soc_pcm_hw_free(struct snd_pcm_substream * substream)946 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
947 {
948 struct snd_soc_pcm_runtime *rtd = substream->private_data;
949 struct snd_soc_platform *platform = rtd->platform;
950 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
951 struct snd_soc_dai *codec_dai;
952 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
953 int i;
954
955 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
956
957 /* clear the corresponding DAIs parameters when going to be inactive */
958 if (cpu_dai->active == 1) {
959 cpu_dai->rate = 0;
960 cpu_dai->channels = 0;
961 cpu_dai->sample_bits = 0;
962 }
963
964 for (i = 0; i < rtd->num_codecs; i++) {
965 codec_dai = rtd->codec_dais[i];
966 if (codec_dai->active == 1) {
967 codec_dai->rate = 0;
968 codec_dai->channels = 0;
969 codec_dai->sample_bits = 0;
970 }
971 }
972
973 /* apply codec digital mute */
974 for (i = 0; i < rtd->num_codecs; i++) {
975 if ((playback && rtd->codec_dais[i]->playback_active == 1) ||
976 (!playback && rtd->codec_dais[i]->capture_active == 1))
977 snd_soc_dai_digital_mute(rtd->codec_dais[i], 1,
978 substream->stream);
979 }
980
981 /* free any machine hw params */
982 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
983 rtd->dai_link->ops->hw_free(substream);
984
985 /* free any DMA resources */
986 if (platform->driver->ops && platform->driver->ops->hw_free)
987 platform->driver->ops->hw_free(substream);
988
989 /* now free hw params for the DAIs */
990 for (i = 0; i < rtd->num_codecs; i++) {
991 codec_dai = rtd->codec_dais[i];
992 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
993 codec_dai->driver->ops->hw_free(substream, codec_dai);
994 }
995
996 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
997 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
998
999 mutex_unlock(&rtd->pcm_mutex);
1000 return 0;
1001 }
1002
soc_pcm_trigger(struct snd_pcm_substream * substream,int cmd)1003 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1004 {
1005 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1006 struct snd_soc_platform *platform = rtd->platform;
1007 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1008 struct snd_soc_dai *codec_dai;
1009 int i, ret;
1010
1011 for (i = 0; i < rtd->num_codecs; i++) {
1012 codec_dai = rtd->codec_dais[i];
1013 if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) {
1014 ret = codec_dai->driver->ops->trigger(substream,
1015 cmd, codec_dai);
1016 if (ret < 0)
1017 return ret;
1018 }
1019 }
1020
1021 if (platform->driver->ops && platform->driver->ops->trigger) {
1022 ret = platform->driver->ops->trigger(substream, cmd);
1023 if (ret < 0)
1024 return ret;
1025 }
1026
1027 if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) {
1028 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
1029 if (ret < 0)
1030 return ret;
1031 }
1032
1033 if (rtd->dai_link->ops && rtd->dai_link->ops->trigger) {
1034 ret = rtd->dai_link->ops->trigger(substream, cmd);
1035 if (ret < 0)
1036 return ret;
1037 }
1038
1039 return 0;
1040 }
1041
soc_pcm_bespoke_trigger(struct snd_pcm_substream * substream,int cmd)1042 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1043 int cmd)
1044 {
1045 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1046 struct snd_soc_platform *platform = rtd->platform;
1047 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1048 struct snd_soc_dai *codec_dai;
1049 int i, ret;
1050
1051 for (i = 0; i < rtd->num_codecs; i++) {
1052 codec_dai = rtd->codec_dais[i];
1053 if (codec_dai->driver->ops &&
1054 codec_dai->driver->ops->bespoke_trigger) {
1055 ret = codec_dai->driver->ops->bespoke_trigger(substream,
1056 cmd, codec_dai);
1057 if (ret < 0)
1058 return ret;
1059 }
1060 }
1061
1062 if (platform->driver->bespoke_trigger) {
1063 ret = platform->driver->bespoke_trigger(substream, cmd);
1064 if (ret < 0)
1065 return ret;
1066 }
1067
1068 if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) {
1069 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1070 if (ret < 0)
1071 return ret;
1072 }
1073 return 0;
1074 }
1075 /*
1076 * soc level wrapper for pointer callback
1077 * If cpu_dai, codec_dai, platform driver has the delay callback, than
1078 * the runtime->delay will be updated accordingly.
1079 */
soc_pcm_pointer(struct snd_pcm_substream * substream)1080 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1081 {
1082 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1083 struct snd_soc_platform *platform = rtd->platform;
1084 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1085 struct snd_soc_dai *codec_dai;
1086 struct snd_pcm_runtime *runtime = substream->runtime;
1087 snd_pcm_uframes_t offset = 0;
1088 snd_pcm_sframes_t delay = 0;
1089 snd_pcm_sframes_t codec_delay = 0;
1090 int i;
1091
1092 if (platform->driver->ops && platform->driver->ops->pointer)
1093 offset = platform->driver->ops->pointer(substream);
1094
1095 if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay)
1096 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1097
1098 for (i = 0; i < rtd->num_codecs; i++) {
1099 codec_dai = rtd->codec_dais[i];
1100 if (codec_dai->driver->ops && codec_dai->driver->ops->delay)
1101 codec_delay = max(codec_delay,
1102 codec_dai->driver->ops->delay(substream,
1103 codec_dai));
1104 }
1105 delay += codec_delay;
1106
1107 /*
1108 * None of the existing platform drivers implement delay(), so
1109 * for now the codec_dai of first multicodec entry is used
1110 */
1111 if (platform->driver->delay)
1112 delay += platform->driver->delay(substream, rtd->codec_dais[0]);
1113
1114 runtime->delay = delay;
1115
1116 return offset;
1117 }
1118
1119 /* connect a FE and BE */
dpcm_be_connect(struct snd_soc_pcm_runtime * fe,struct snd_soc_pcm_runtime * be,int stream)1120 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1121 struct snd_soc_pcm_runtime *be, int stream)
1122 {
1123 struct snd_soc_dpcm *dpcm;
1124
1125 /* only add new dpcms */
1126 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1127 if (dpcm->be == be && dpcm->fe == fe)
1128 return 0;
1129 }
1130
1131 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1132 if (!dpcm)
1133 return -ENOMEM;
1134
1135 dpcm->be = be;
1136 dpcm->fe = fe;
1137 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1138 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1139 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1140 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1141
1142 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1143 stream ? "capture" : "playback", fe->dai_link->name,
1144 stream ? "<-" : "->", be->dai_link->name);
1145
1146 #ifdef CONFIG_DEBUG_FS
1147 if (fe->debugfs_dpcm_root)
1148 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1149 fe->debugfs_dpcm_root, &dpcm->state);
1150 #endif
1151 return 1;
1152 }
1153
1154 /* reparent a BE onto another FE */
dpcm_be_reparent(struct snd_soc_pcm_runtime * fe,struct snd_soc_pcm_runtime * be,int stream)1155 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1156 struct snd_soc_pcm_runtime *be, int stream)
1157 {
1158 struct snd_soc_dpcm *dpcm;
1159 struct snd_pcm_substream *fe_substream, *be_substream;
1160
1161 /* reparent if BE is connected to other FEs */
1162 if (!be->dpcm[stream].users)
1163 return;
1164
1165 be_substream = snd_soc_dpcm_get_substream(be, stream);
1166
1167 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
1168 if (dpcm->fe == fe)
1169 continue;
1170
1171 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1172 stream ? "capture" : "playback",
1173 dpcm->fe->dai_link->name,
1174 stream ? "<-" : "->", dpcm->be->dai_link->name);
1175
1176 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1177 be_substream->runtime = fe_substream->runtime;
1178 break;
1179 }
1180 }
1181
1182 /* disconnect a BE and FE */
dpcm_be_disconnect(struct snd_soc_pcm_runtime * fe,int stream)1183 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1184 {
1185 struct snd_soc_dpcm *dpcm, *d;
1186
1187 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
1188 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1189 stream ? "capture" : "playback",
1190 dpcm->be->dai_link->name);
1191
1192 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1193 continue;
1194
1195 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1196 stream ? "capture" : "playback", fe->dai_link->name,
1197 stream ? "<-" : "->", dpcm->be->dai_link->name);
1198
1199 /* BEs still alive need new FE */
1200 dpcm_be_reparent(fe, dpcm->be, stream);
1201
1202 #ifdef CONFIG_DEBUG_FS
1203 debugfs_remove(dpcm->debugfs_state);
1204 #endif
1205 list_del(&dpcm->list_be);
1206 list_del(&dpcm->list_fe);
1207 kfree(dpcm);
1208 }
1209 }
1210
1211 /* get BE for DAI widget and stream */
dpcm_get_be(struct snd_soc_card * card,struct snd_soc_dapm_widget * widget,int stream)1212 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1213 struct snd_soc_dapm_widget *widget, int stream)
1214 {
1215 struct snd_soc_pcm_runtime *be;
1216 int i, j;
1217
1218 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1219 for (i = 0; i < card->num_links; i++) {
1220 be = &card->rtd[i];
1221
1222 if (!be->dai_link->no_pcm)
1223 continue;
1224
1225 if (be->cpu_dai->playback_widget == widget)
1226 return be;
1227
1228 for (j = 0; j < be->num_codecs; j++) {
1229 struct snd_soc_dai *dai = be->codec_dais[j];
1230 if (dai->playback_widget == widget)
1231 return be;
1232 }
1233 }
1234 } else {
1235
1236 for (i = 0; i < card->num_links; i++) {
1237 be = &card->rtd[i];
1238
1239 if (!be->dai_link->no_pcm)
1240 continue;
1241
1242 if (be->cpu_dai->capture_widget == widget)
1243 return be;
1244
1245 for (j = 0; j < be->num_codecs; j++) {
1246 struct snd_soc_dai *dai = be->codec_dais[j];
1247 if (dai->capture_widget == widget)
1248 return be;
1249 }
1250 }
1251 }
1252
1253 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1254 stream ? "capture" : "playback", widget->name);
1255 return NULL;
1256 }
1257
1258 static inline struct snd_soc_dapm_widget *
dai_get_widget(struct snd_soc_dai * dai,int stream)1259 dai_get_widget(struct snd_soc_dai *dai, int stream)
1260 {
1261 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1262 return dai->playback_widget;
1263 else
1264 return dai->capture_widget;
1265 }
1266
widget_in_list(struct snd_soc_dapm_widget_list * list,struct snd_soc_dapm_widget * widget)1267 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1268 struct snd_soc_dapm_widget *widget)
1269 {
1270 int i;
1271
1272 for (i = 0; i < list->num_widgets; i++) {
1273 if (widget == list->widgets[i])
1274 return 1;
1275 }
1276
1277 return 0;
1278 }
1279
dpcm_path_get(struct snd_soc_pcm_runtime * fe,int stream,struct snd_soc_dapm_widget_list ** list)1280 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1281 int stream, struct snd_soc_dapm_widget_list **list)
1282 {
1283 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1284 int paths;
1285
1286 /* get number of valid DAI paths and their widgets */
1287 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list);
1288
1289 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1290 stream ? "capture" : "playback");
1291
1292 return paths;
1293 }
1294
dpcm_prune_paths(struct snd_soc_pcm_runtime * fe,int stream,struct snd_soc_dapm_widget_list ** list_)1295 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1296 struct snd_soc_dapm_widget_list **list_)
1297 {
1298 struct snd_soc_dpcm *dpcm;
1299 struct snd_soc_dapm_widget_list *list = *list_;
1300 struct snd_soc_dapm_widget *widget;
1301 int prune = 0;
1302
1303 /* Destroy any old FE <--> BE connections */
1304 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1305 unsigned int i;
1306
1307 /* is there a valid CPU DAI widget for this BE */
1308 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1309
1310 /* prune the BE if it's no longer in our active list */
1311 if (widget && widget_in_list(list, widget))
1312 continue;
1313
1314 /* is there a valid CODEC DAI widget for this BE */
1315 for (i = 0; i < dpcm->be->num_codecs; i++) {
1316 struct snd_soc_dai *dai = dpcm->be->codec_dais[i];
1317 widget = dai_get_widget(dai, stream);
1318
1319 /* prune the BE if it's no longer in our active list */
1320 if (widget && widget_in_list(list, widget))
1321 continue;
1322 }
1323
1324 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1325 stream ? "capture" : "playback",
1326 dpcm->be->dai_link->name, fe->dai_link->name);
1327 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1328 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1329 prune++;
1330 }
1331
1332 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1333 return prune;
1334 }
1335
dpcm_add_paths(struct snd_soc_pcm_runtime * fe,int stream,struct snd_soc_dapm_widget_list ** list_)1336 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1337 struct snd_soc_dapm_widget_list **list_)
1338 {
1339 struct snd_soc_card *card = fe->card;
1340 struct snd_soc_dapm_widget_list *list = *list_;
1341 struct snd_soc_pcm_runtime *be;
1342 int i, new = 0, err;
1343
1344 /* Create any new FE <--> BE connections */
1345 for (i = 0; i < list->num_widgets; i++) {
1346
1347 switch (list->widgets[i]->id) {
1348 case snd_soc_dapm_dai_in:
1349 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1350 continue;
1351 break;
1352 case snd_soc_dapm_dai_out:
1353 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1354 continue;
1355 break;
1356 default:
1357 continue;
1358 }
1359
1360 /* is there a valid BE rtd for this widget */
1361 be = dpcm_get_be(card, list->widgets[i], stream);
1362 if (!be) {
1363 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1364 list->widgets[i]->name);
1365 continue;
1366 }
1367
1368 /* make sure BE is a real BE */
1369 if (!be->dai_link->no_pcm)
1370 continue;
1371
1372 /* don't connect if FE is not running */
1373 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1374 continue;
1375
1376 /* newly connected FE and BE */
1377 err = dpcm_be_connect(fe, be, stream);
1378 if (err < 0) {
1379 dev_err(fe->dev, "ASoC: can't connect %s\n",
1380 list->widgets[i]->name);
1381 break;
1382 } else if (err == 0) /* already connected */
1383 continue;
1384
1385 /* new */
1386 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1387 new++;
1388 }
1389
1390 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1391 return new;
1392 }
1393
1394 /*
1395 * Find the corresponding BE DAIs that source or sink audio to this
1396 * FE substream.
1397 */
dpcm_process_paths(struct snd_soc_pcm_runtime * fe,int stream,struct snd_soc_dapm_widget_list ** list,int new)1398 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1399 int stream, struct snd_soc_dapm_widget_list **list, int new)
1400 {
1401 if (new)
1402 return dpcm_add_paths(fe, stream, list);
1403 else
1404 return dpcm_prune_paths(fe, stream, list);
1405 }
1406
dpcm_clear_pending_state(struct snd_soc_pcm_runtime * fe,int stream)1407 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1408 {
1409 struct snd_soc_dpcm *dpcm;
1410
1411 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1412 dpcm->be->dpcm[stream].runtime_update =
1413 SND_SOC_DPCM_UPDATE_NO;
1414 }
1415
dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime * fe,int stream)1416 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1417 int stream)
1418 {
1419 struct snd_soc_dpcm *dpcm;
1420
1421 /* disable any enabled and non active backends */
1422 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1423
1424 struct snd_soc_pcm_runtime *be = dpcm->be;
1425 struct snd_pcm_substream *be_substream =
1426 snd_soc_dpcm_get_substream(be, stream);
1427
1428 if (be->dpcm[stream].users == 0)
1429 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1430 stream ? "capture" : "playback",
1431 be->dpcm[stream].state);
1432
1433 if (--be->dpcm[stream].users != 0)
1434 continue;
1435
1436 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1437 continue;
1438
1439 soc_pcm_close(be_substream);
1440 be_substream->runtime = NULL;
1441 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1442 }
1443 }
1444
dpcm_be_dai_startup(struct snd_soc_pcm_runtime * fe,int stream)1445 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1446 {
1447 struct snd_soc_dpcm *dpcm;
1448 int err, count = 0;
1449
1450 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1451 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1452
1453 struct snd_soc_pcm_runtime *be = dpcm->be;
1454 struct snd_pcm_substream *be_substream =
1455 snd_soc_dpcm_get_substream(be, stream);
1456
1457 if (!be_substream) {
1458 dev_err(be->dev, "ASoC: no backend %s stream\n",
1459 stream ? "capture" : "playback");
1460 continue;
1461 }
1462
1463 /* is this op for this BE ? */
1464 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1465 continue;
1466
1467 /* first time the dpcm is open ? */
1468 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1469 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1470 stream ? "capture" : "playback",
1471 be->dpcm[stream].state);
1472
1473 if (be->dpcm[stream].users++ != 0)
1474 continue;
1475
1476 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1477 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1478 continue;
1479
1480 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1481 stream ? "capture" : "playback", be->dai_link->name);
1482
1483 be_substream->runtime = be->dpcm[stream].runtime;
1484 err = soc_pcm_open(be_substream);
1485 if (err < 0) {
1486 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1487 be->dpcm[stream].users--;
1488 if (be->dpcm[stream].users < 0)
1489 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1490 stream ? "capture" : "playback",
1491 be->dpcm[stream].state);
1492
1493 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1494 goto unwind;
1495 }
1496
1497 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1498 count++;
1499 }
1500
1501 return count;
1502
1503 unwind:
1504 /* disable any enabled and non active backends */
1505 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1506 struct snd_soc_pcm_runtime *be = dpcm->be;
1507 struct snd_pcm_substream *be_substream =
1508 snd_soc_dpcm_get_substream(be, stream);
1509
1510 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1511 continue;
1512
1513 if (be->dpcm[stream].users == 0)
1514 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1515 stream ? "capture" : "playback",
1516 be->dpcm[stream].state);
1517
1518 if (--be->dpcm[stream].users != 0)
1519 continue;
1520
1521 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1522 continue;
1523
1524 soc_pcm_close(be_substream);
1525 be_substream->runtime = NULL;
1526 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1527 }
1528
1529 return err;
1530 }
1531
dpcm_init_runtime_hw(struct snd_pcm_runtime * runtime,struct snd_soc_pcm_stream * stream,u64 formats)1532 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1533 struct snd_soc_pcm_stream *stream,
1534 u64 formats)
1535 {
1536 runtime->hw.rate_min = stream->rate_min;
1537 runtime->hw.rate_max = stream->rate_max;
1538 runtime->hw.channels_min = stream->channels_min;
1539 runtime->hw.channels_max = stream->channels_max;
1540 if (runtime->hw.formats)
1541 runtime->hw.formats &= formats & stream->formats;
1542 else
1543 runtime->hw.formats = formats & stream->formats;
1544 runtime->hw.rates = stream->rates;
1545 }
1546
dpcm_runtime_base_format(struct snd_pcm_substream * substream)1547 static u64 dpcm_runtime_base_format(struct snd_pcm_substream *substream)
1548 {
1549 struct snd_soc_pcm_runtime *fe = substream->private_data;
1550 struct snd_soc_dpcm *dpcm;
1551 u64 formats = ULLONG_MAX;
1552 int stream = substream->stream;
1553
1554 if (!fe->dai_link->dpcm_merged_format)
1555 return formats;
1556
1557 /*
1558 * It returns merged BE codec format
1559 * if FE want to use it (= dpcm_merged_format)
1560 */
1561
1562 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1563 struct snd_soc_pcm_runtime *be = dpcm->be;
1564 struct snd_soc_dai_driver *codec_dai_drv;
1565 struct snd_soc_pcm_stream *codec_stream;
1566 int i;
1567
1568 for (i = 0; i < be->num_codecs; i++) {
1569 codec_dai_drv = be->codec_dais[i]->driver;
1570 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1571 codec_stream = &codec_dai_drv->playback;
1572 else
1573 codec_stream = &codec_dai_drv->capture;
1574
1575 formats &= codec_stream->formats;
1576 }
1577 }
1578
1579 return formats;
1580 }
1581
dpcm_set_fe_runtime(struct snd_pcm_substream * substream)1582 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1583 {
1584 struct snd_pcm_runtime *runtime = substream->runtime;
1585 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1586 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1587 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1588 u64 format = dpcm_runtime_base_format(substream);
1589
1590 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1591 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback, format);
1592 else
1593 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture, format);
1594 }
1595
1596 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1597
1598 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1599 * for avoiding the race with trigger callback.
1600 * If the state is unset and a trigger is pending while the previous operation,
1601 * process the pending trigger action here.
1602 */
dpcm_set_fe_update_state(struct snd_soc_pcm_runtime * fe,int stream,enum snd_soc_dpcm_update state)1603 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1604 int stream, enum snd_soc_dpcm_update state)
1605 {
1606 struct snd_pcm_substream *substream =
1607 snd_soc_dpcm_get_substream(fe, stream);
1608
1609 snd_pcm_stream_lock_irq(substream);
1610 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1611 dpcm_fe_dai_do_trigger(substream,
1612 fe->dpcm[stream].trigger_pending - 1);
1613 fe->dpcm[stream].trigger_pending = 0;
1614 }
1615 fe->dpcm[stream].runtime_update = state;
1616 snd_pcm_stream_unlock_irq(substream);
1617 }
1618
dpcm_fe_dai_startup(struct snd_pcm_substream * fe_substream)1619 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1620 {
1621 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1622 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1623 int stream = fe_substream->stream, ret = 0;
1624
1625 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1626
1627 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1628 if (ret < 0) {
1629 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1630 goto be_err;
1631 }
1632
1633 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1634
1635 /* start the DAI frontend */
1636 ret = soc_pcm_open(fe_substream);
1637 if (ret < 0) {
1638 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1639 goto unwind;
1640 }
1641
1642 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1643
1644 dpcm_set_fe_runtime(fe_substream);
1645 snd_pcm_limit_hw_rates(runtime);
1646
1647 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1648 return 0;
1649
1650 unwind:
1651 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1652 be_err:
1653 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1654 return ret;
1655 }
1656
dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime * fe,int stream)1657 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1658 {
1659 struct snd_soc_dpcm *dpcm;
1660
1661 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1662 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1663
1664 struct snd_soc_pcm_runtime *be = dpcm->be;
1665 struct snd_pcm_substream *be_substream =
1666 snd_soc_dpcm_get_substream(be, stream);
1667
1668 /* is this op for this BE ? */
1669 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1670 continue;
1671
1672 if (be->dpcm[stream].users == 0)
1673 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1674 stream ? "capture" : "playback",
1675 be->dpcm[stream].state);
1676
1677 if (--be->dpcm[stream].users != 0)
1678 continue;
1679
1680 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1681 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1682 continue;
1683
1684 dev_dbg(be->dev, "ASoC: close BE %s\n",
1685 dpcm->fe->dai_link->name);
1686
1687 soc_pcm_close(be_substream);
1688 be_substream->runtime = NULL;
1689
1690 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1691 }
1692 return 0;
1693 }
1694
dpcm_fe_dai_shutdown(struct snd_pcm_substream * substream)1695 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1696 {
1697 struct snd_soc_pcm_runtime *fe = substream->private_data;
1698 int stream = substream->stream;
1699
1700 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1701
1702 /* shutdown the BEs */
1703 dpcm_be_dai_shutdown(fe, substream->stream);
1704
1705 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1706
1707 /* now shutdown the frontend */
1708 soc_pcm_close(substream);
1709
1710 /* run the stream event for each BE */
1711 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1712
1713 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1714 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1715 return 0;
1716 }
1717
dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime * fe,int stream)1718 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1719 {
1720 struct snd_soc_dpcm *dpcm;
1721
1722 /* only hw_params backends that are either sinks or sources
1723 * to this frontend DAI */
1724 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1725
1726 struct snd_soc_pcm_runtime *be = dpcm->be;
1727 struct snd_pcm_substream *be_substream =
1728 snd_soc_dpcm_get_substream(be, stream);
1729
1730 /* is this op for this BE ? */
1731 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1732 continue;
1733
1734 /* only free hw when no longer used - check all FEs */
1735 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1736 continue;
1737
1738 /* do not free hw if this BE is used by other FE */
1739 if (be->dpcm[stream].users > 1)
1740 continue;
1741
1742 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1743 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1744 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1745 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1746 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1747 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1748 continue;
1749
1750 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1751 dpcm->fe->dai_link->name);
1752
1753 soc_pcm_hw_free(be_substream);
1754
1755 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1756 }
1757
1758 return 0;
1759 }
1760
dpcm_fe_dai_hw_free(struct snd_pcm_substream * substream)1761 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1762 {
1763 struct snd_soc_pcm_runtime *fe = substream->private_data;
1764 int err, stream = substream->stream;
1765
1766 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1767 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1768
1769 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1770
1771 /* call hw_free on the frontend */
1772 err = soc_pcm_hw_free(substream);
1773 if (err < 0)
1774 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
1775 fe->dai_link->name);
1776
1777 /* only hw_params backends that are either sinks or sources
1778 * to this frontend DAI */
1779 err = dpcm_be_dai_hw_free(fe, stream);
1780
1781 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1782 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1783
1784 mutex_unlock(&fe->card->mutex);
1785 return 0;
1786 }
1787
dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime * fe,int stream)1788 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1789 {
1790 struct snd_soc_dpcm *dpcm;
1791 int ret;
1792
1793 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1794
1795 struct snd_soc_pcm_runtime *be = dpcm->be;
1796 struct snd_pcm_substream *be_substream =
1797 snd_soc_dpcm_get_substream(be, stream);
1798
1799 /* is this op for this BE ? */
1800 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1801 continue;
1802
1803 /* only allow hw_params() if no connected FEs are running */
1804 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1805 continue;
1806
1807 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1808 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1809 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1810 continue;
1811
1812 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1813 dpcm->fe->dai_link->name);
1814
1815 /* copy params for each dpcm */
1816 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1817 sizeof(struct snd_pcm_hw_params));
1818
1819 /* perform any hw_params fixups */
1820 if (be->dai_link->be_hw_params_fixup) {
1821 ret = be->dai_link->be_hw_params_fixup(be,
1822 &dpcm->hw_params);
1823 if (ret < 0) {
1824 dev_err(be->dev,
1825 "ASoC: hw_params BE fixup failed %d\n",
1826 ret);
1827 goto unwind;
1828 }
1829 }
1830
1831 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1832 if (ret < 0) {
1833 dev_err(dpcm->be->dev,
1834 "ASoC: hw_params BE failed %d\n", ret);
1835 goto unwind;
1836 }
1837
1838 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1839 }
1840 return 0;
1841
1842 unwind:
1843 /* disable any enabled and non active backends */
1844 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1845 struct snd_soc_pcm_runtime *be = dpcm->be;
1846 struct snd_pcm_substream *be_substream =
1847 snd_soc_dpcm_get_substream(be, stream);
1848
1849 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1850 continue;
1851
1852 /* only allow hw_free() if no connected FEs are running */
1853 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1854 continue;
1855
1856 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1857 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1858 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1859 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1860 continue;
1861
1862 soc_pcm_hw_free(be_substream);
1863 }
1864
1865 return ret;
1866 }
1867
dpcm_fe_dai_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)1868 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1869 struct snd_pcm_hw_params *params)
1870 {
1871 struct snd_soc_pcm_runtime *fe = substream->private_data;
1872 int ret, stream = substream->stream;
1873
1874 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1875 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1876
1877 memcpy(&fe->dpcm[substream->stream].hw_params, params,
1878 sizeof(struct snd_pcm_hw_params));
1879 ret = dpcm_be_dai_hw_params(fe, substream->stream);
1880 if (ret < 0) {
1881 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
1882 goto out;
1883 }
1884
1885 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1886 fe->dai_link->name, params_rate(params),
1887 params_channels(params), params_format(params));
1888
1889 /* call hw_params on the frontend */
1890 ret = soc_pcm_hw_params(substream, params);
1891 if (ret < 0) {
1892 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
1893 dpcm_be_dai_hw_free(fe, stream);
1894 } else
1895 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1896
1897 out:
1898 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1899 mutex_unlock(&fe->card->mutex);
1900 return ret;
1901 }
1902
dpcm_do_trigger(struct snd_soc_dpcm * dpcm,struct snd_pcm_substream * substream,int cmd)1903 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
1904 struct snd_pcm_substream *substream, int cmd)
1905 {
1906 int ret;
1907
1908 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
1909 dpcm->fe->dai_link->name, cmd);
1910
1911 ret = soc_pcm_trigger(substream, cmd);
1912 if (ret < 0)
1913 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
1914
1915 return ret;
1916 }
1917
dpcm_be_dai_trigger(struct snd_soc_pcm_runtime * fe,int stream,int cmd)1918 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
1919 int cmd)
1920 {
1921 struct snd_soc_dpcm *dpcm;
1922 int ret = 0;
1923
1924 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1925
1926 struct snd_soc_pcm_runtime *be = dpcm->be;
1927 struct snd_pcm_substream *be_substream =
1928 snd_soc_dpcm_get_substream(be, stream);
1929
1930 /* is this op for this BE ? */
1931 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1932 continue;
1933
1934 switch (cmd) {
1935 case SNDRV_PCM_TRIGGER_START:
1936 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1937 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1938 continue;
1939
1940 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1941 if (ret)
1942 return ret;
1943
1944 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1945 break;
1946 case SNDRV_PCM_TRIGGER_RESUME:
1947 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1948 continue;
1949
1950 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1951 if (ret)
1952 return ret;
1953
1954 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1955 break;
1956 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1957 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
1958 continue;
1959
1960 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1961 if (ret)
1962 return ret;
1963
1964 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1965 break;
1966 case SNDRV_PCM_TRIGGER_STOP:
1967 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1968 continue;
1969
1970 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1971 continue;
1972
1973 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1974 if (ret)
1975 return ret;
1976
1977 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1978 break;
1979 case SNDRV_PCM_TRIGGER_SUSPEND:
1980 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1981 continue;
1982
1983 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1984 continue;
1985
1986 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1987 if (ret)
1988 return ret;
1989
1990 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
1991 break;
1992 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1993 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1994 continue;
1995
1996 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1997 continue;
1998
1999 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2000 if (ret)
2001 return ret;
2002
2003 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2004 break;
2005 }
2006 }
2007
2008 return ret;
2009 }
2010 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2011
dpcm_fe_dai_do_trigger(struct snd_pcm_substream * substream,int cmd)2012 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2013 {
2014 struct snd_soc_pcm_runtime *fe = substream->private_data;
2015 int stream = substream->stream, ret;
2016 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2017
2018 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2019
2020 switch (trigger) {
2021 case SND_SOC_DPCM_TRIGGER_PRE:
2022 /* call trigger on the frontend before the backend. */
2023
2024 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2025 fe->dai_link->name, cmd);
2026
2027 ret = soc_pcm_trigger(substream, cmd);
2028 if (ret < 0) {
2029 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2030 goto out;
2031 }
2032
2033 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2034 break;
2035 case SND_SOC_DPCM_TRIGGER_POST:
2036 /* call trigger on the frontend after the backend. */
2037
2038 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2039 if (ret < 0) {
2040 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2041 goto out;
2042 }
2043
2044 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2045 fe->dai_link->name, cmd);
2046
2047 ret = soc_pcm_trigger(substream, cmd);
2048 break;
2049 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2050 /* bespoke trigger() - handles both FE and BEs */
2051
2052 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2053 fe->dai_link->name, cmd);
2054
2055 ret = soc_pcm_bespoke_trigger(substream, cmd);
2056 if (ret < 0) {
2057 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2058 goto out;
2059 }
2060 break;
2061 default:
2062 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2063 fe->dai_link->name);
2064 ret = -EINVAL;
2065 goto out;
2066 }
2067
2068 switch (cmd) {
2069 case SNDRV_PCM_TRIGGER_START:
2070 case SNDRV_PCM_TRIGGER_RESUME:
2071 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2072 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2073 break;
2074 case SNDRV_PCM_TRIGGER_STOP:
2075 case SNDRV_PCM_TRIGGER_SUSPEND:
2076 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2077 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2078 break;
2079 }
2080
2081 out:
2082 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2083 return ret;
2084 }
2085
dpcm_fe_dai_trigger(struct snd_pcm_substream * substream,int cmd)2086 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2087 {
2088 struct snd_soc_pcm_runtime *fe = substream->private_data;
2089 int stream = substream->stream;
2090
2091 /* if FE's runtime_update is already set, we're in race;
2092 * process this trigger later at exit
2093 */
2094 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2095 fe->dpcm[stream].trigger_pending = cmd + 1;
2096 return 0; /* delayed, assuming it's successful */
2097 }
2098
2099 /* we're alone, let's trigger */
2100 return dpcm_fe_dai_do_trigger(substream, cmd);
2101 }
2102
dpcm_be_dai_prepare(struct snd_soc_pcm_runtime * fe,int stream)2103 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2104 {
2105 struct snd_soc_dpcm *dpcm;
2106 int ret = 0;
2107
2108 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2109
2110 struct snd_soc_pcm_runtime *be = dpcm->be;
2111 struct snd_pcm_substream *be_substream =
2112 snd_soc_dpcm_get_substream(be, stream);
2113
2114 /* is this op for this BE ? */
2115 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2116 continue;
2117
2118 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2119 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2120 continue;
2121
2122 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2123 dpcm->fe->dai_link->name);
2124
2125 ret = soc_pcm_prepare(be_substream);
2126 if (ret < 0) {
2127 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2128 ret);
2129 break;
2130 }
2131
2132 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2133 }
2134 return ret;
2135 }
2136
dpcm_fe_dai_prepare(struct snd_pcm_substream * substream)2137 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2138 {
2139 struct snd_soc_pcm_runtime *fe = substream->private_data;
2140 int stream = substream->stream, ret = 0;
2141
2142 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2143
2144 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2145
2146 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2147
2148 /* there is no point preparing this FE if there are no BEs */
2149 if (list_empty(&fe->dpcm[stream].be_clients)) {
2150 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2151 fe->dai_link->name);
2152 ret = -EINVAL;
2153 goto out;
2154 }
2155
2156 ret = dpcm_be_dai_prepare(fe, substream->stream);
2157 if (ret < 0)
2158 goto out;
2159
2160 /* call prepare on the frontend */
2161 ret = soc_pcm_prepare(substream);
2162 if (ret < 0) {
2163 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2164 fe->dai_link->name);
2165 goto out;
2166 }
2167
2168 /* run the stream event for each BE */
2169 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2170 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2171
2172 out:
2173 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2174 mutex_unlock(&fe->card->mutex);
2175
2176 return ret;
2177 }
2178
soc_pcm_ioctl(struct snd_pcm_substream * substream,unsigned int cmd,void * arg)2179 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2180 unsigned int cmd, void *arg)
2181 {
2182 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2183 struct snd_soc_platform *platform = rtd->platform;
2184
2185 if (platform->driver->ops && platform->driver->ops->ioctl)
2186 return platform->driver->ops->ioctl(substream, cmd, arg);
2187 return snd_pcm_lib_ioctl(substream, cmd, arg);
2188 }
2189
dpcm_run_update_shutdown(struct snd_soc_pcm_runtime * fe,int stream)2190 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2191 {
2192 struct snd_pcm_substream *substream =
2193 snd_soc_dpcm_get_substream(fe, stream);
2194 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2195 int err;
2196
2197 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2198 stream ? "capture" : "playback", fe->dai_link->name);
2199
2200 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2201 /* call bespoke trigger - FE takes care of all BE triggers */
2202 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2203 fe->dai_link->name);
2204
2205 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2206 if (err < 0)
2207 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2208 } else {
2209 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2210 fe->dai_link->name);
2211
2212 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2213 if (err < 0)
2214 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2215 }
2216
2217 err = dpcm_be_dai_hw_free(fe, stream);
2218 if (err < 0)
2219 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2220
2221 err = dpcm_be_dai_shutdown(fe, stream);
2222 if (err < 0)
2223 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2224
2225 /* run the stream event for each BE */
2226 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2227
2228 return 0;
2229 }
2230
dpcm_run_update_startup(struct snd_soc_pcm_runtime * fe,int stream)2231 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2232 {
2233 struct snd_pcm_substream *substream =
2234 snd_soc_dpcm_get_substream(fe, stream);
2235 struct snd_soc_dpcm *dpcm;
2236 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2237 int ret;
2238
2239 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2240 stream ? "capture" : "playback", fe->dai_link->name);
2241
2242 /* Only start the BE if the FE is ready */
2243 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2244 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2245 return -EINVAL;
2246
2247 /* startup must always be called for new BEs */
2248 ret = dpcm_be_dai_startup(fe, stream);
2249 if (ret < 0)
2250 goto disconnect;
2251
2252 /* keep going if FE state is > open */
2253 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2254 return 0;
2255
2256 ret = dpcm_be_dai_hw_params(fe, stream);
2257 if (ret < 0)
2258 goto close;
2259
2260 /* keep going if FE state is > hw_params */
2261 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2262 return 0;
2263
2264
2265 ret = dpcm_be_dai_prepare(fe, stream);
2266 if (ret < 0)
2267 goto hw_free;
2268
2269 /* run the stream event for each BE */
2270 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2271
2272 /* keep going if FE state is > prepare */
2273 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2274 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2275 return 0;
2276
2277 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2278 /* call trigger on the frontend - FE takes care of all BE triggers */
2279 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2280 fe->dai_link->name);
2281
2282 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2283 if (ret < 0) {
2284 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2285 goto hw_free;
2286 }
2287 } else {
2288 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2289 fe->dai_link->name);
2290
2291 ret = dpcm_be_dai_trigger(fe, stream,
2292 SNDRV_PCM_TRIGGER_START);
2293 if (ret < 0) {
2294 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2295 goto hw_free;
2296 }
2297 }
2298
2299 return 0;
2300
2301 hw_free:
2302 dpcm_be_dai_hw_free(fe, stream);
2303 close:
2304 dpcm_be_dai_shutdown(fe, stream);
2305 disconnect:
2306 /* disconnect any non started BEs */
2307 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2308 struct snd_soc_pcm_runtime *be = dpcm->be;
2309 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2310 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2311 }
2312
2313 return ret;
2314 }
2315
dpcm_run_new_update(struct snd_soc_pcm_runtime * fe,int stream)2316 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2317 {
2318 int ret;
2319
2320 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2321 ret = dpcm_run_update_startup(fe, stream);
2322 if (ret < 0)
2323 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2324 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2325
2326 return ret;
2327 }
2328
dpcm_run_old_update(struct snd_soc_pcm_runtime * fe,int stream)2329 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2330 {
2331 int ret;
2332
2333 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2334 ret = dpcm_run_update_shutdown(fe, stream);
2335 if (ret < 0)
2336 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2337 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2338
2339 return ret;
2340 }
2341
2342 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2343 * any DAI links.
2344 */
soc_dpcm_runtime_update(struct snd_soc_card * card)2345 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2346 {
2347 int i, old, new, paths;
2348
2349 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2350 for (i = 0; i < card->num_rtd; i++) {
2351 struct snd_soc_dapm_widget_list *list;
2352 struct snd_soc_pcm_runtime *fe = &card->rtd[i];
2353
2354 /* make sure link is FE */
2355 if (!fe->dai_link->dynamic)
2356 continue;
2357
2358 /* only check active links */
2359 if (!fe->cpu_dai->active)
2360 continue;
2361
2362 /* DAPM sync will call this to update DSP paths */
2363 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
2364 fe->dai_link->name);
2365
2366 /* skip if FE doesn't have playback capability */
2367 if (!fe->cpu_dai->driver->playback.channels_min
2368 || !fe->codec_dai->driver->playback.channels_min)
2369 goto capture;
2370
2371 /* skip if FE isn't currently playing */
2372 if (!fe->cpu_dai->playback_active
2373 || !fe->codec_dai->playback_active)
2374 goto capture;
2375
2376 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2377 if (paths < 0) {
2378 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2379 fe->dai_link->name, "playback");
2380 mutex_unlock(&card->mutex);
2381 return paths;
2382 }
2383
2384 /* update any new playback paths */
2385 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
2386 if (new) {
2387 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2388 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2389 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2390 }
2391
2392 /* update any old playback paths */
2393 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
2394 if (old) {
2395 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2396 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2397 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2398 }
2399
2400 dpcm_path_put(&list);
2401 capture:
2402 /* skip if FE doesn't have capture capability */
2403 if (!fe->cpu_dai->driver->capture.channels_min
2404 || !fe->codec_dai->driver->capture.channels_min)
2405 continue;
2406
2407 /* skip if FE isn't currently capturing */
2408 if (!fe->cpu_dai->capture_active
2409 || !fe->codec_dai->capture_active)
2410 continue;
2411
2412 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2413 if (paths < 0) {
2414 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2415 fe->dai_link->name, "capture");
2416 mutex_unlock(&card->mutex);
2417 return paths;
2418 }
2419
2420 /* update any new capture paths */
2421 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
2422 if (new) {
2423 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2424 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2425 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2426 }
2427
2428 /* update any old capture paths */
2429 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
2430 if (old) {
2431 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2432 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2433 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2434 }
2435
2436 dpcm_path_put(&list);
2437 }
2438
2439 mutex_unlock(&card->mutex);
2440 return 0;
2441 }
soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime * fe,int mute)2442 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2443 {
2444 struct snd_soc_dpcm *dpcm;
2445 struct list_head *clients =
2446 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
2447
2448 list_for_each_entry(dpcm, clients, list_be) {
2449
2450 struct snd_soc_pcm_runtime *be = dpcm->be;
2451 int i;
2452
2453 if (be->dai_link->ignore_suspend)
2454 continue;
2455
2456 for (i = 0; i < be->num_codecs; i++) {
2457 struct snd_soc_dai *dai = be->codec_dais[i];
2458 struct snd_soc_dai_driver *drv = dai->driver;
2459
2460 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2461 be->dai_link->name);
2462
2463 if (drv->ops && drv->ops->digital_mute &&
2464 dai->playback_active)
2465 drv->ops->digital_mute(dai, mute);
2466 }
2467 }
2468
2469 return 0;
2470 }
2471
dpcm_fe_dai_open(struct snd_pcm_substream * fe_substream)2472 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2473 {
2474 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2475 struct snd_soc_dpcm *dpcm;
2476 struct snd_soc_dapm_widget_list *list;
2477 int ret;
2478 int stream = fe_substream->stream;
2479
2480 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2481 fe->dpcm[stream].runtime = fe_substream->runtime;
2482
2483 ret = dpcm_path_get(fe, stream, &list);
2484 if (ret < 0) {
2485 mutex_unlock(&fe->card->mutex);
2486 return ret;
2487 } else if (ret == 0) {
2488 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2489 fe->dai_link->name, stream ? "capture" : "playback");
2490 }
2491
2492 /* calculate valid and active FE <-> BE dpcms */
2493 dpcm_process_paths(fe, stream, &list, 1);
2494
2495 ret = dpcm_fe_dai_startup(fe_substream);
2496 if (ret < 0) {
2497 /* clean up all links */
2498 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2499 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2500
2501 dpcm_be_disconnect(fe, stream);
2502 fe->dpcm[stream].runtime = NULL;
2503 }
2504
2505 dpcm_clear_pending_state(fe, stream);
2506 dpcm_path_put(&list);
2507 mutex_unlock(&fe->card->mutex);
2508 return ret;
2509 }
2510
dpcm_fe_dai_close(struct snd_pcm_substream * fe_substream)2511 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2512 {
2513 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2514 struct snd_soc_dpcm *dpcm;
2515 int stream = fe_substream->stream, ret;
2516
2517 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2518 ret = dpcm_fe_dai_shutdown(fe_substream);
2519
2520 /* mark FE's links ready to prune */
2521 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2522 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2523
2524 dpcm_be_disconnect(fe, stream);
2525
2526 fe->dpcm[stream].runtime = NULL;
2527 mutex_unlock(&fe->card->mutex);
2528 return ret;
2529 }
2530
2531 /* create a new pcm */
soc_new_pcm(struct snd_soc_pcm_runtime * rtd,int num)2532 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2533 {
2534 struct snd_soc_platform *platform = rtd->platform;
2535 struct snd_soc_dai *codec_dai;
2536 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2537 struct snd_pcm *pcm;
2538 char new_name[64];
2539 int ret = 0, playback = 0, capture = 0;
2540 int i;
2541
2542 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2543 playback = rtd->dai_link->dpcm_playback;
2544 capture = rtd->dai_link->dpcm_capture;
2545 } else {
2546 for (i = 0; i < rtd->num_codecs; i++) {
2547 codec_dai = rtd->codec_dais[i];
2548 if (codec_dai->driver->playback.channels_min)
2549 playback = 1;
2550 if (codec_dai->driver->capture.channels_min)
2551 capture = 1;
2552 }
2553
2554 capture = capture && cpu_dai->driver->capture.channels_min;
2555 playback = playback && cpu_dai->driver->playback.channels_min;
2556 }
2557
2558 if (rtd->dai_link->playback_only) {
2559 playback = 1;
2560 capture = 0;
2561 }
2562
2563 if (rtd->dai_link->capture_only) {
2564 playback = 0;
2565 capture = 1;
2566 }
2567
2568 /* create the PCM */
2569 if (rtd->dai_link->no_pcm) {
2570 snprintf(new_name, sizeof(new_name), "(%s)",
2571 rtd->dai_link->stream_name);
2572
2573 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2574 playback, capture, &pcm);
2575 } else {
2576 if (rtd->dai_link->dynamic)
2577 snprintf(new_name, sizeof(new_name), "%s (*)",
2578 rtd->dai_link->stream_name);
2579 else
2580 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2581 rtd->dai_link->stream_name,
2582 (rtd->num_codecs > 1) ?
2583 "multicodec" : rtd->codec_dai->name, num);
2584
2585 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2586 capture, &pcm);
2587 }
2588 if (ret < 0) {
2589 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2590 rtd->dai_link->name);
2591 return ret;
2592 }
2593 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2594
2595 /* DAPM dai link stream work */
2596 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2597
2598 pcm->nonatomic = rtd->dai_link->nonatomic;
2599 rtd->pcm = pcm;
2600 pcm->private_data = rtd;
2601
2602 if (rtd->dai_link->no_pcm) {
2603 if (playback)
2604 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2605 if (capture)
2606 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2607 goto out;
2608 }
2609
2610 /* ASoC PCM operations */
2611 if (rtd->dai_link->dynamic) {
2612 rtd->ops.open = dpcm_fe_dai_open;
2613 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2614 rtd->ops.prepare = dpcm_fe_dai_prepare;
2615 rtd->ops.trigger = dpcm_fe_dai_trigger;
2616 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2617 rtd->ops.close = dpcm_fe_dai_close;
2618 rtd->ops.pointer = soc_pcm_pointer;
2619 rtd->ops.ioctl = soc_pcm_ioctl;
2620 } else {
2621 rtd->ops.open = soc_pcm_open;
2622 rtd->ops.hw_params = soc_pcm_hw_params;
2623 rtd->ops.prepare = soc_pcm_prepare;
2624 rtd->ops.trigger = soc_pcm_trigger;
2625 rtd->ops.hw_free = soc_pcm_hw_free;
2626 rtd->ops.close = soc_pcm_close;
2627 rtd->ops.pointer = soc_pcm_pointer;
2628 rtd->ops.ioctl = soc_pcm_ioctl;
2629 }
2630
2631 if (platform->driver->ops) {
2632 rtd->ops.ack = platform->driver->ops->ack;
2633 rtd->ops.copy = platform->driver->ops->copy;
2634 rtd->ops.silence = platform->driver->ops->silence;
2635 rtd->ops.page = platform->driver->ops->page;
2636 rtd->ops.mmap = platform->driver->ops->mmap;
2637 }
2638
2639 if (playback)
2640 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2641
2642 if (capture)
2643 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2644
2645 if (platform->driver->pcm_new) {
2646 ret = platform->driver->pcm_new(rtd);
2647 if (ret < 0) {
2648 dev_err(platform->dev,
2649 "ASoC: pcm constructor failed: %d\n",
2650 ret);
2651 return ret;
2652 }
2653 }
2654
2655 pcm->private_free = platform->driver->pcm_free;
2656 out:
2657 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
2658 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
2659 cpu_dai->name);
2660 return ret;
2661 }
2662
2663 /* is the current PCM operation for this FE ? */
snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime * fe,int stream)2664 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2665 {
2666 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2667 return 1;
2668 return 0;
2669 }
2670 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2671
2672 /* is the current PCM operation for this BE ? */
snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime * fe,struct snd_soc_pcm_runtime * be,int stream)2673 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2674 struct snd_soc_pcm_runtime *be, int stream)
2675 {
2676 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2677 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2678 be->dpcm[stream].runtime_update))
2679 return 1;
2680 return 0;
2681 }
2682 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2683
2684 /* get the substream for this BE */
2685 struct snd_pcm_substream *
snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime * be,int stream)2686 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2687 {
2688 return be->pcm->streams[stream].substream;
2689 }
2690 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2691
2692 /* get the BE runtime state */
2693 enum snd_soc_dpcm_state
snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime * be,int stream)2694 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2695 {
2696 return be->dpcm[stream].state;
2697 }
2698 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
2699
2700 /* set the BE runtime state */
snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime * be,int stream,enum snd_soc_dpcm_state state)2701 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
2702 int stream, enum snd_soc_dpcm_state state)
2703 {
2704 be->dpcm[stream].state = state;
2705 }
2706 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
2707
2708 /*
2709 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2710 * are not running, paused or suspended for the specified stream direction.
2711 */
snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime * fe,struct snd_soc_pcm_runtime * be,int stream)2712 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2713 struct snd_soc_pcm_runtime *be, int stream)
2714 {
2715 struct snd_soc_dpcm *dpcm;
2716 int state;
2717
2718 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2719
2720 if (dpcm->fe == fe)
2721 continue;
2722
2723 state = dpcm->fe->dpcm[stream].state;
2724 if (state == SND_SOC_DPCM_STATE_START ||
2725 state == SND_SOC_DPCM_STATE_PAUSED ||
2726 state == SND_SOC_DPCM_STATE_SUSPEND)
2727 return 0;
2728 }
2729
2730 /* it's safe to free/stop this BE DAI */
2731 return 1;
2732 }
2733 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2734
2735 /*
2736 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2737 * running, paused or suspended for the specified stream direction.
2738 */
snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime * fe,struct snd_soc_pcm_runtime * be,int stream)2739 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2740 struct snd_soc_pcm_runtime *be, int stream)
2741 {
2742 struct snd_soc_dpcm *dpcm;
2743 int state;
2744
2745 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2746
2747 if (dpcm->fe == fe)
2748 continue;
2749
2750 state = dpcm->fe->dpcm[stream].state;
2751 if (state == SND_SOC_DPCM_STATE_START ||
2752 state == SND_SOC_DPCM_STATE_PAUSED ||
2753 state == SND_SOC_DPCM_STATE_SUSPEND ||
2754 state == SND_SOC_DPCM_STATE_PREPARE)
2755 return 0;
2756 }
2757
2758 /* it's safe to change hw_params */
2759 return 1;
2760 }
2761 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2762
snd_soc_platform_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_platform * platform)2763 int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
2764 int cmd, struct snd_soc_platform *platform)
2765 {
2766 if (platform->driver->ops && platform->driver->ops->trigger)
2767 return platform->driver->ops->trigger(substream, cmd);
2768 return 0;
2769 }
2770 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger);
2771
2772 #ifdef CONFIG_DEBUG_FS
dpcm_state_string(enum snd_soc_dpcm_state state)2773 static char *dpcm_state_string(enum snd_soc_dpcm_state state)
2774 {
2775 switch (state) {
2776 case SND_SOC_DPCM_STATE_NEW:
2777 return "new";
2778 case SND_SOC_DPCM_STATE_OPEN:
2779 return "open";
2780 case SND_SOC_DPCM_STATE_HW_PARAMS:
2781 return "hw_params";
2782 case SND_SOC_DPCM_STATE_PREPARE:
2783 return "prepare";
2784 case SND_SOC_DPCM_STATE_START:
2785 return "start";
2786 case SND_SOC_DPCM_STATE_STOP:
2787 return "stop";
2788 case SND_SOC_DPCM_STATE_SUSPEND:
2789 return "suspend";
2790 case SND_SOC_DPCM_STATE_PAUSED:
2791 return "paused";
2792 case SND_SOC_DPCM_STATE_HW_FREE:
2793 return "hw_free";
2794 case SND_SOC_DPCM_STATE_CLOSE:
2795 return "close";
2796 }
2797
2798 return "unknown";
2799 }
2800
dpcm_show_state(struct snd_soc_pcm_runtime * fe,int stream,char * buf,size_t size)2801 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2802 int stream, char *buf, size_t size)
2803 {
2804 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2805 struct snd_soc_dpcm *dpcm;
2806 ssize_t offset = 0;
2807
2808 /* FE state */
2809 offset += snprintf(buf + offset, size - offset,
2810 "[%s - %s]\n", fe->dai_link->name,
2811 stream ? "Capture" : "Playback");
2812
2813 offset += snprintf(buf + offset, size - offset, "State: %s\n",
2814 dpcm_state_string(fe->dpcm[stream].state));
2815
2816 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2817 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2818 offset += snprintf(buf + offset, size - offset,
2819 "Hardware Params: "
2820 "Format = %s, Channels = %d, Rate = %d\n",
2821 snd_pcm_format_name(params_format(params)),
2822 params_channels(params),
2823 params_rate(params));
2824
2825 /* BEs state */
2826 offset += snprintf(buf + offset, size - offset, "Backends:\n");
2827
2828 if (list_empty(&fe->dpcm[stream].be_clients)) {
2829 offset += snprintf(buf + offset, size - offset,
2830 " No active DSP links\n");
2831 goto out;
2832 }
2833
2834 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2835 struct snd_soc_pcm_runtime *be = dpcm->be;
2836 params = &dpcm->hw_params;
2837
2838 offset += snprintf(buf + offset, size - offset,
2839 "- %s\n", be->dai_link->name);
2840
2841 offset += snprintf(buf + offset, size - offset,
2842 " State: %s\n",
2843 dpcm_state_string(be->dpcm[stream].state));
2844
2845 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2846 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2847 offset += snprintf(buf + offset, size - offset,
2848 " Hardware Params: "
2849 "Format = %s, Channels = %d, Rate = %d\n",
2850 snd_pcm_format_name(params_format(params)),
2851 params_channels(params),
2852 params_rate(params));
2853 }
2854
2855 out:
2856 return offset;
2857 }
2858
dpcm_state_read_file(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)2859 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
2860 size_t count, loff_t *ppos)
2861 {
2862 struct snd_soc_pcm_runtime *fe = file->private_data;
2863 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
2864 char *buf;
2865
2866 buf = kmalloc(out_count, GFP_KERNEL);
2867 if (!buf)
2868 return -ENOMEM;
2869
2870 if (fe->cpu_dai->driver->playback.channels_min)
2871 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
2872 buf + offset, out_count - offset);
2873
2874 if (fe->cpu_dai->driver->capture.channels_min)
2875 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
2876 buf + offset, out_count - offset);
2877
2878 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
2879
2880 kfree(buf);
2881 return ret;
2882 }
2883
2884 static const struct file_operations dpcm_state_fops = {
2885 .open = simple_open,
2886 .read = dpcm_state_read_file,
2887 .llseek = default_llseek,
2888 };
2889
soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime * rtd)2890 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
2891 {
2892 if (!rtd->dai_link)
2893 return;
2894
2895 if (!rtd->card->debugfs_card_root)
2896 return;
2897
2898 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
2899 rtd->card->debugfs_card_root);
2900 if (!rtd->debugfs_dpcm_root) {
2901 dev_dbg(rtd->dev,
2902 "ASoC: Failed to create dpcm debugfs directory %s\n",
2903 rtd->dai_link->name);
2904 return;
2905 }
2906
2907 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
2908 rtd->debugfs_dpcm_root,
2909 rtd, &dpcm_state_fops);
2910 }
2911 #endif
2912