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Merge tag 'tty-4.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
[deliverable/linux.git] / sound / soc / soc-pcm.c
1 /*
2 * soc-pcm.c -- ALSA SoC PCM
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Authors: Liam Girdwood <lrg@ti.com>
10 * Mark Brown <broonie@opensource.wolfsonmicro.com>
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 *
17 */
18
19 #include <linux/kernel.h>
20 #include <linux/init.h>
21 #include <linux/delay.h>
22 #include <linux/pinctrl/consumer.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/slab.h>
25 #include <linux/workqueue.h>
26 #include <linux/export.h>
27 #include <linux/debugfs.h>
28 #include <sound/core.h>
29 #include <sound/pcm.h>
30 #include <sound/pcm_params.h>
31 #include <sound/soc.h>
32 #include <sound/soc-dpcm.h>
33 #include <sound/initval.h>
34
35 #define DPCM_MAX_BE_USERS 8
36
37 /**
38 * snd_soc_runtime_activate() - Increment active count for PCM runtime components
39 * @rtd: ASoC PCM runtime that is activated
40 * @stream: Direction of the PCM stream
41 *
42 * Increments the active count for all the DAIs and components attached to a PCM
43 * runtime. Should typically be called when a stream is opened.
44 *
45 * Must be called with the rtd->pcm_mutex being held
46 */
47 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
48 {
49 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
50 int i;
51
52 lockdep_assert_held(&rtd->pcm_mutex);
53
54 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
55 cpu_dai->playback_active++;
56 for (i = 0; i < rtd->num_codecs; i++)
57 rtd->codec_dais[i]->playback_active++;
58 } else {
59 cpu_dai->capture_active++;
60 for (i = 0; i < rtd->num_codecs; i++)
61 rtd->codec_dais[i]->capture_active++;
62 }
63
64 cpu_dai->active++;
65 cpu_dai->component->active++;
66 for (i = 0; i < rtd->num_codecs; i++) {
67 rtd->codec_dais[i]->active++;
68 rtd->codec_dais[i]->component->active++;
69 }
70 }
71
72 /**
73 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
74 * @rtd: ASoC PCM runtime that is deactivated
75 * @stream: Direction of the PCM stream
76 *
77 * Decrements the active count for all the DAIs and components attached to a PCM
78 * runtime. Should typically be called when a stream is closed.
79 *
80 * Must be called with the rtd->pcm_mutex being held
81 */
82 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
83 {
84 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
85 int i;
86
87 lockdep_assert_held(&rtd->pcm_mutex);
88
89 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
90 cpu_dai->playback_active--;
91 for (i = 0; i < rtd->num_codecs; i++)
92 rtd->codec_dais[i]->playback_active--;
93 } else {
94 cpu_dai->capture_active--;
95 for (i = 0; i < rtd->num_codecs; i++)
96 rtd->codec_dais[i]->capture_active--;
97 }
98
99 cpu_dai->active--;
100 cpu_dai->component->active--;
101 for (i = 0; i < rtd->num_codecs; i++) {
102 rtd->codec_dais[i]->component->active--;
103 rtd->codec_dais[i]->active--;
104 }
105 }
106
107 /**
108 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
109 * @rtd: The ASoC PCM runtime that should be checked.
110 *
111 * This function checks whether the power down delay should be ignored for a
112 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
113 * been configured to ignore the delay, or if none of the components benefits
114 * from having the delay.
115 */
116 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
117 {
118 int i;
119 bool ignore = true;
120
121 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
122 return true;
123
124 for (i = 0; i < rtd->num_codecs; i++)
125 ignore &= rtd->codec_dais[i]->component->ignore_pmdown_time;
126
127 return rtd->cpu_dai->component->ignore_pmdown_time && ignore;
128 }
129
130 /**
131 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
132 * @substream: the pcm substream
133 * @hw: the hardware parameters
134 *
135 * Sets the substream runtime hardware parameters.
136 */
137 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
138 const struct snd_pcm_hardware *hw)
139 {
140 struct snd_pcm_runtime *runtime = substream->runtime;
141 runtime->hw.info = hw->info;
142 runtime->hw.formats = hw->formats;
143 runtime->hw.period_bytes_min = hw->period_bytes_min;
144 runtime->hw.period_bytes_max = hw->period_bytes_max;
145 runtime->hw.periods_min = hw->periods_min;
146 runtime->hw.periods_max = hw->periods_max;
147 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
148 runtime->hw.fifo_size = hw->fifo_size;
149 return 0;
150 }
151 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
152
153 /* DPCM stream event, send event to FE and all active BEs. */
154 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
155 int event)
156 {
157 struct snd_soc_dpcm *dpcm;
158
159 list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
160
161 struct snd_soc_pcm_runtime *be = dpcm->be;
162
163 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
164 be->dai_link->name, event, dir);
165
166 snd_soc_dapm_stream_event(be, dir, event);
167 }
168
169 snd_soc_dapm_stream_event(fe, dir, event);
170
171 return 0;
172 }
173
174 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
175 struct snd_soc_dai *soc_dai)
176 {
177 struct snd_soc_pcm_runtime *rtd = substream->private_data;
178 int ret;
179
180 if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
181 rtd->dai_link->symmetric_rates)) {
182 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
183 soc_dai->rate);
184
185 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
186 SNDRV_PCM_HW_PARAM_RATE,
187 soc_dai->rate, soc_dai->rate);
188 if (ret < 0) {
189 dev_err(soc_dai->dev,
190 "ASoC: Unable to apply rate constraint: %d\n",
191 ret);
192 return ret;
193 }
194 }
195
196 if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
197 rtd->dai_link->symmetric_channels)) {
198 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
199 soc_dai->channels);
200
201 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
202 SNDRV_PCM_HW_PARAM_CHANNELS,
203 soc_dai->channels,
204 soc_dai->channels);
205 if (ret < 0) {
206 dev_err(soc_dai->dev,
207 "ASoC: Unable to apply channel symmetry constraint: %d\n",
208 ret);
209 return ret;
210 }
211 }
212
213 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
214 rtd->dai_link->symmetric_samplebits)) {
215 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
216 soc_dai->sample_bits);
217
218 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
219 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
220 soc_dai->sample_bits,
221 soc_dai->sample_bits);
222 if (ret < 0) {
223 dev_err(soc_dai->dev,
224 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
225 ret);
226 return ret;
227 }
228 }
229
230 return 0;
231 }
232
233 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
234 struct snd_pcm_hw_params *params)
235 {
236 struct snd_soc_pcm_runtime *rtd = substream->private_data;
237 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
238 unsigned int rate, channels, sample_bits, symmetry, i;
239
240 rate = params_rate(params);
241 channels = params_channels(params);
242 sample_bits = snd_pcm_format_physical_width(params_format(params));
243
244 /* reject unmatched parameters when applying symmetry */
245 symmetry = cpu_dai->driver->symmetric_rates ||
246 rtd->dai_link->symmetric_rates;
247
248 for (i = 0; i < rtd->num_codecs; i++)
249 symmetry |= rtd->codec_dais[i]->driver->symmetric_rates;
250
251 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
252 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
253 cpu_dai->rate, rate);
254 return -EINVAL;
255 }
256
257 symmetry = cpu_dai->driver->symmetric_channels ||
258 rtd->dai_link->symmetric_channels;
259
260 for (i = 0; i < rtd->num_codecs; i++)
261 symmetry |= rtd->codec_dais[i]->driver->symmetric_channels;
262
263 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
264 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
265 cpu_dai->channels, channels);
266 return -EINVAL;
267 }
268
269 symmetry = cpu_dai->driver->symmetric_samplebits ||
270 rtd->dai_link->symmetric_samplebits;
271
272 for (i = 0; i < rtd->num_codecs; i++)
273 symmetry |= rtd->codec_dais[i]->driver->symmetric_samplebits;
274
275 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
276 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
277 cpu_dai->sample_bits, sample_bits);
278 return -EINVAL;
279 }
280
281 return 0;
282 }
283
284 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
285 {
286 struct snd_soc_pcm_runtime *rtd = substream->private_data;
287 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
288 struct snd_soc_dai_link *link = rtd->dai_link;
289 unsigned int symmetry, i;
290
291 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
292 cpu_driver->symmetric_channels || link->symmetric_channels ||
293 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
294
295 for (i = 0; i < rtd->num_codecs; i++)
296 symmetry = symmetry ||
297 rtd->codec_dais[i]->driver->symmetric_rates ||
298 rtd->codec_dais[i]->driver->symmetric_channels ||
299 rtd->codec_dais[i]->driver->symmetric_samplebits;
300
301 return symmetry;
302 }
303
304 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
305 {
306 struct snd_soc_pcm_runtime *rtd = substream->private_data;
307 int ret;
308
309 if (!bits)
310 return;
311
312 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
313 if (ret != 0)
314 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
315 bits, ret);
316 }
317
318 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
319 {
320 struct snd_soc_pcm_runtime *rtd = substream->private_data;
321 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
322 struct snd_soc_dai *codec_dai;
323 int i;
324 unsigned int bits = 0, cpu_bits;
325
326 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
327 for (i = 0; i < rtd->num_codecs; i++) {
328 codec_dai = rtd->codec_dais[i];
329 if (codec_dai->driver->playback.sig_bits == 0) {
330 bits = 0;
331 break;
332 }
333 bits = max(codec_dai->driver->playback.sig_bits, bits);
334 }
335 cpu_bits = cpu_dai->driver->playback.sig_bits;
336 } else {
337 for (i = 0; i < rtd->num_codecs; i++) {
338 codec_dai = rtd->codec_dais[i];
339 if (codec_dai->driver->capture.sig_bits == 0) {
340 bits = 0;
341 break;
342 }
343 bits = max(codec_dai->driver->capture.sig_bits, bits);
344 }
345 cpu_bits = cpu_dai->driver->capture.sig_bits;
346 }
347
348 soc_pcm_set_msb(substream, bits);
349 soc_pcm_set_msb(substream, cpu_bits);
350 }
351
352 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
353 {
354 struct snd_pcm_runtime *runtime = substream->runtime;
355 struct snd_pcm_hardware *hw = &runtime->hw;
356 struct snd_soc_pcm_runtime *rtd = substream->private_data;
357 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
358 struct snd_soc_dai_driver *codec_dai_drv;
359 struct snd_soc_pcm_stream *codec_stream;
360 struct snd_soc_pcm_stream *cpu_stream;
361 unsigned int chan_min = 0, chan_max = UINT_MAX;
362 unsigned int rate_min = 0, rate_max = UINT_MAX;
363 unsigned int rates = UINT_MAX;
364 u64 formats = ULLONG_MAX;
365 int i;
366
367 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
368 cpu_stream = &cpu_dai_drv->playback;
369 else
370 cpu_stream = &cpu_dai_drv->capture;
371
372 /* first calculate min/max only for CODECs in the DAI link */
373 for (i = 0; i < rtd->num_codecs; i++) {
374 codec_dai_drv = rtd->codec_dais[i]->driver;
375 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
376 codec_stream = &codec_dai_drv->playback;
377 else
378 codec_stream = &codec_dai_drv->capture;
379 chan_min = max(chan_min, codec_stream->channels_min);
380 chan_max = min(chan_max, codec_stream->channels_max);
381 rate_min = max(rate_min, codec_stream->rate_min);
382 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
383 formats &= codec_stream->formats;
384 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
385 }
386
387 /*
388 * chan min/max cannot be enforced if there are multiple CODEC DAIs
389 * connected to a single CPU DAI, use CPU DAI's directly and let
390 * channel allocation be fixed up later
391 */
392 if (rtd->num_codecs > 1) {
393 chan_min = cpu_stream->channels_min;
394 chan_max = cpu_stream->channels_max;
395 }
396
397 hw->channels_min = max(chan_min, cpu_stream->channels_min);
398 hw->channels_max = min(chan_max, cpu_stream->channels_max);
399 if (hw->formats)
400 hw->formats &= formats & cpu_stream->formats;
401 else
402 hw->formats = formats & cpu_stream->formats;
403 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
404
405 snd_pcm_limit_hw_rates(runtime);
406
407 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
408 hw->rate_min = max(hw->rate_min, rate_min);
409 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
410 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
411 }
412
413 /*
414 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
415 * then initialized and any private data can be allocated. This also calls
416 * startup for the cpu DAI, platform, machine and codec DAI.
417 */
418 static int soc_pcm_open(struct snd_pcm_substream *substream)
419 {
420 struct snd_soc_pcm_runtime *rtd = substream->private_data;
421 struct snd_pcm_runtime *runtime = substream->runtime;
422 struct snd_soc_platform *platform = rtd->platform;
423 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
424 struct snd_soc_dai *codec_dai;
425 const char *codec_dai_name = "multicodec";
426 int i, ret = 0;
427
428 pinctrl_pm_select_default_state(cpu_dai->dev);
429 for (i = 0; i < rtd->num_codecs; i++)
430 pinctrl_pm_select_default_state(rtd->codec_dais[i]->dev);
431 pm_runtime_get_sync(cpu_dai->dev);
432 for (i = 0; i < rtd->num_codecs; i++)
433 pm_runtime_get_sync(rtd->codec_dais[i]->dev);
434 pm_runtime_get_sync(platform->dev);
435
436 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
437
438 /* startup the audio subsystem */
439 if (cpu_dai->driver->ops && cpu_dai->driver->ops->startup) {
440 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
441 if (ret < 0) {
442 dev_err(cpu_dai->dev, "ASoC: can't open interface"
443 " %s: %d\n", cpu_dai->name, ret);
444 goto out;
445 }
446 }
447
448 if (platform->driver->ops && platform->driver->ops->open) {
449 ret = platform->driver->ops->open(substream);
450 if (ret < 0) {
451 dev_err(platform->dev, "ASoC: can't open platform"
452 " %s: %d\n", platform->component.name, ret);
453 goto platform_err;
454 }
455 }
456
457 for (i = 0; i < rtd->num_codecs; i++) {
458 codec_dai = rtd->codec_dais[i];
459 if (codec_dai->driver->ops && codec_dai->driver->ops->startup) {
460 ret = codec_dai->driver->ops->startup(substream,
461 codec_dai);
462 if (ret < 0) {
463 dev_err(codec_dai->dev,
464 "ASoC: can't open codec %s: %d\n",
465 codec_dai->name, ret);
466 goto codec_dai_err;
467 }
468 }
469
470 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
471 codec_dai->tx_mask = 0;
472 else
473 codec_dai->rx_mask = 0;
474 }
475
476 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
477 ret = rtd->dai_link->ops->startup(substream);
478 if (ret < 0) {
479 pr_err("ASoC: %s startup failed: %d\n",
480 rtd->dai_link->name, ret);
481 goto machine_err;
482 }
483 }
484
485 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
486 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
487 goto dynamic;
488
489 /* Check that the codec and cpu DAIs are compatible */
490 soc_pcm_init_runtime_hw(substream);
491
492 if (rtd->num_codecs == 1)
493 codec_dai_name = rtd->codec_dai->name;
494
495 if (soc_pcm_has_symmetry(substream))
496 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
497
498 ret = -EINVAL;
499 if (!runtime->hw.rates) {
500 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
501 codec_dai_name, cpu_dai->name);
502 goto config_err;
503 }
504 if (!runtime->hw.formats) {
505 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
506 codec_dai_name, cpu_dai->name);
507 goto config_err;
508 }
509 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
510 runtime->hw.channels_min > runtime->hw.channels_max) {
511 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
512 codec_dai_name, cpu_dai->name);
513 goto config_err;
514 }
515
516 soc_pcm_apply_msb(substream);
517
518 /* Symmetry only applies if we've already got an active stream. */
519 if (cpu_dai->active) {
520 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
521 if (ret != 0)
522 goto config_err;
523 }
524
525 for (i = 0; i < rtd->num_codecs; i++) {
526 if (rtd->codec_dais[i]->active) {
527 ret = soc_pcm_apply_symmetry(substream,
528 rtd->codec_dais[i]);
529 if (ret != 0)
530 goto config_err;
531 }
532 }
533
534 pr_debug("ASoC: %s <-> %s info:\n",
535 codec_dai_name, cpu_dai->name);
536 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
537 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
538 runtime->hw.channels_max);
539 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
540 runtime->hw.rate_max);
541
542 dynamic:
543
544 snd_soc_runtime_activate(rtd, substream->stream);
545
546 mutex_unlock(&rtd->pcm_mutex);
547 return 0;
548
549 config_err:
550 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
551 rtd->dai_link->ops->shutdown(substream);
552
553 machine_err:
554 i = rtd->num_codecs;
555
556 codec_dai_err:
557 while (--i >= 0) {
558 codec_dai = rtd->codec_dais[i];
559 if (codec_dai->driver->ops->shutdown)
560 codec_dai->driver->ops->shutdown(substream, codec_dai);
561 }
562
563 if (platform->driver->ops && platform->driver->ops->close)
564 platform->driver->ops->close(substream);
565
566 platform_err:
567 if (cpu_dai->driver->ops->shutdown)
568 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
569 out:
570 mutex_unlock(&rtd->pcm_mutex);
571
572 pm_runtime_put(platform->dev);
573 for (i = 0; i < rtd->num_codecs; i++)
574 pm_runtime_put(rtd->codec_dais[i]->dev);
575 pm_runtime_put(cpu_dai->dev);
576 for (i = 0; i < rtd->num_codecs; i++) {
577 if (!rtd->codec_dais[i]->active)
578 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
579 }
580 if (!cpu_dai->active)
581 pinctrl_pm_select_sleep_state(cpu_dai->dev);
582
583 return ret;
584 }
585
586 /*
587 * Power down the audio subsystem pmdown_time msecs after close is called.
588 * This is to ensure there are no pops or clicks in between any music tracks
589 * due to DAPM power cycling.
590 */
591 static void close_delayed_work(struct work_struct *work)
592 {
593 struct snd_soc_pcm_runtime *rtd =
594 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
595 struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
596
597 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
598
599 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
600 codec_dai->driver->playback.stream_name,
601 codec_dai->playback_active ? "active" : "inactive",
602 rtd->pop_wait ? "yes" : "no");
603
604 /* are we waiting on this codec DAI stream */
605 if (rtd->pop_wait == 1) {
606 rtd->pop_wait = 0;
607 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
608 SND_SOC_DAPM_STREAM_STOP);
609 }
610
611 mutex_unlock(&rtd->pcm_mutex);
612 }
613
614 /*
615 * Called by ALSA when a PCM substream is closed. Private data can be
616 * freed here. The cpu DAI, codec DAI, machine and platform are also
617 * shutdown.
618 */
619 static int soc_pcm_close(struct snd_pcm_substream *substream)
620 {
621 struct snd_soc_pcm_runtime *rtd = substream->private_data;
622 struct snd_soc_platform *platform = rtd->platform;
623 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
624 struct snd_soc_dai *codec_dai;
625 int i;
626
627 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
628
629 snd_soc_runtime_deactivate(rtd, substream->stream);
630
631 /* clear the corresponding DAIs rate when inactive */
632 if (!cpu_dai->active)
633 cpu_dai->rate = 0;
634
635 for (i = 0; i < rtd->num_codecs; i++) {
636 codec_dai = rtd->codec_dais[i];
637 if (!codec_dai->active)
638 codec_dai->rate = 0;
639 }
640
641 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
642
643 if (cpu_dai->driver->ops->shutdown)
644 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
645
646 for (i = 0; i < rtd->num_codecs; i++) {
647 codec_dai = rtd->codec_dais[i];
648 if (codec_dai->driver->ops->shutdown)
649 codec_dai->driver->ops->shutdown(substream, codec_dai);
650 }
651
652 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
653 rtd->dai_link->ops->shutdown(substream);
654
655 if (platform->driver->ops && platform->driver->ops->close)
656 platform->driver->ops->close(substream);
657
658 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
659 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
660 /* powered down playback stream now */
661 snd_soc_dapm_stream_event(rtd,
662 SNDRV_PCM_STREAM_PLAYBACK,
663 SND_SOC_DAPM_STREAM_STOP);
664 } else {
665 /* start delayed pop wq here for playback streams */
666 rtd->pop_wait = 1;
667 queue_delayed_work(system_power_efficient_wq,
668 &rtd->delayed_work,
669 msecs_to_jiffies(rtd->pmdown_time));
670 }
671 } else {
672 /* capture streams can be powered down now */
673 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
674 SND_SOC_DAPM_STREAM_STOP);
675 }
676
677 mutex_unlock(&rtd->pcm_mutex);
678
679 pm_runtime_put(platform->dev);
680 for (i = 0; i < rtd->num_codecs; i++)
681 pm_runtime_put(rtd->codec_dais[i]->dev);
682 pm_runtime_put(cpu_dai->dev);
683 for (i = 0; i < rtd->num_codecs; i++) {
684 if (!rtd->codec_dais[i]->active)
685 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
686 }
687 if (!cpu_dai->active)
688 pinctrl_pm_select_sleep_state(cpu_dai->dev);
689
690 return 0;
691 }
692
693 /*
694 * Called by ALSA when the PCM substream is prepared, can set format, sample
695 * rate, etc. This function is non atomic and can be called multiple times,
696 * it can refer to the runtime info.
697 */
698 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
699 {
700 struct snd_soc_pcm_runtime *rtd = substream->private_data;
701 struct snd_soc_platform *platform = rtd->platform;
702 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
703 struct snd_soc_dai *codec_dai;
704 int i, ret = 0;
705
706 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
707
708 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
709 ret = rtd->dai_link->ops->prepare(substream);
710 if (ret < 0) {
711 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
712 " %d\n", ret);
713 goto out;
714 }
715 }
716
717 if (platform->driver->ops && platform->driver->ops->prepare) {
718 ret = platform->driver->ops->prepare(substream);
719 if (ret < 0) {
720 dev_err(platform->dev, "ASoC: platform prepare error:"
721 " %d\n", ret);
722 goto out;
723 }
724 }
725
726 for (i = 0; i < rtd->num_codecs; i++) {
727 codec_dai = rtd->codec_dais[i];
728 if (codec_dai->driver->ops && codec_dai->driver->ops->prepare) {
729 ret = codec_dai->driver->ops->prepare(substream,
730 codec_dai);
731 if (ret < 0) {
732 dev_err(codec_dai->dev,
733 "ASoC: codec DAI prepare error: %d\n",
734 ret);
735 goto out;
736 }
737 }
738 }
739
740 if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) {
741 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
742 if (ret < 0) {
743 dev_err(cpu_dai->dev,
744 "ASoC: cpu DAI prepare error: %d\n", ret);
745 goto out;
746 }
747 }
748
749 /* cancel any delayed stream shutdown that is pending */
750 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
751 rtd->pop_wait) {
752 rtd->pop_wait = 0;
753 cancel_delayed_work(&rtd->delayed_work);
754 }
755
756 snd_soc_dapm_stream_event(rtd, substream->stream,
757 SND_SOC_DAPM_STREAM_START);
758
759 for (i = 0; i < rtd->num_codecs; i++)
760 snd_soc_dai_digital_mute(rtd->codec_dais[i], 0,
761 substream->stream);
762 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
763
764 out:
765 mutex_unlock(&rtd->pcm_mutex);
766 return ret;
767 }
768
769 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
770 unsigned int mask)
771 {
772 struct snd_interval *interval;
773 int channels = hweight_long(mask);
774
775 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
776 interval->min = channels;
777 interval->max = channels;
778 }
779
780 int soc_dai_hw_params(struct snd_pcm_substream *substream,
781 struct snd_pcm_hw_params *params,
782 struct snd_soc_dai *dai)
783 {
784 int ret;
785
786 if (dai->driver->ops && dai->driver->ops->hw_params) {
787 ret = dai->driver->ops->hw_params(substream, params, dai);
788 if (ret < 0) {
789 dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
790 dai->name, ret);
791 return ret;
792 }
793 }
794
795 return 0;
796 }
797
798 /*
799 * Called by ALSA when the hardware params are set by application. This
800 * function can also be called multiple times and can allocate buffers
801 * (using snd_pcm_lib_* ). It's non-atomic.
802 */
803 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
804 struct snd_pcm_hw_params *params)
805 {
806 struct snd_soc_pcm_runtime *rtd = substream->private_data;
807 struct snd_soc_platform *platform = rtd->platform;
808 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
809 int i, ret = 0;
810
811 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
812
813 ret = soc_pcm_params_symmetry(substream, params);
814 if (ret)
815 goto out;
816
817 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
818 ret = rtd->dai_link->ops->hw_params(substream, params);
819 if (ret < 0) {
820 dev_err(rtd->card->dev, "ASoC: machine hw_params"
821 " failed: %d\n", ret);
822 goto out;
823 }
824 }
825
826 for (i = 0; i < rtd->num_codecs; i++) {
827 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
828 struct snd_pcm_hw_params codec_params;
829
830 /* copy params for each codec */
831 codec_params = *params;
832
833 /* fixup params based on TDM slot masks */
834 if (codec_dai->tx_mask)
835 soc_pcm_codec_params_fixup(&codec_params,
836 codec_dai->tx_mask);
837 if (codec_dai->rx_mask)
838 soc_pcm_codec_params_fixup(&codec_params,
839 codec_dai->rx_mask);
840
841 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
842 if(ret < 0)
843 goto codec_err;
844
845 codec_dai->rate = params_rate(&codec_params);
846 codec_dai->channels = params_channels(&codec_params);
847 codec_dai->sample_bits = snd_pcm_format_physical_width(
848 params_format(&codec_params));
849 }
850
851 ret = soc_dai_hw_params(substream, params, cpu_dai);
852 if (ret < 0)
853 goto interface_err;
854
855 if (platform->driver->ops && platform->driver->ops->hw_params) {
856 ret = platform->driver->ops->hw_params(substream, params);
857 if (ret < 0) {
858 dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
859 platform->component.name, ret);
860 goto platform_err;
861 }
862 }
863
864 /* store the parameters for each DAIs */
865 cpu_dai->rate = params_rate(params);
866 cpu_dai->channels = params_channels(params);
867 cpu_dai->sample_bits =
868 snd_pcm_format_physical_width(params_format(params));
869
870 out:
871 mutex_unlock(&rtd->pcm_mutex);
872 return ret;
873
874 platform_err:
875 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
876 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
877
878 interface_err:
879 i = rtd->num_codecs;
880
881 codec_err:
882 while (--i >= 0) {
883 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
884 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
885 codec_dai->driver->ops->hw_free(substream, codec_dai);
886 codec_dai->rate = 0;
887 }
888
889 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
890 rtd->dai_link->ops->hw_free(substream);
891
892 mutex_unlock(&rtd->pcm_mutex);
893 return ret;
894 }
895
896 /*
897 * Frees resources allocated by hw_params, can be called multiple times
898 */
899 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
900 {
901 struct snd_soc_pcm_runtime *rtd = substream->private_data;
902 struct snd_soc_platform *platform = rtd->platform;
903 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
904 struct snd_soc_dai *codec_dai;
905 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
906 int i;
907
908 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
909
910 /* clear the corresponding DAIs parameters when going to be inactive */
911 if (cpu_dai->active == 1) {
912 cpu_dai->rate = 0;
913 cpu_dai->channels = 0;
914 cpu_dai->sample_bits = 0;
915 }
916
917 for (i = 0; i < rtd->num_codecs; i++) {
918 codec_dai = rtd->codec_dais[i];
919 if (codec_dai->active == 1) {
920 codec_dai->rate = 0;
921 codec_dai->channels = 0;
922 codec_dai->sample_bits = 0;
923 }
924 }
925
926 /* apply codec digital mute */
927 for (i = 0; i < rtd->num_codecs; i++) {
928 if ((playback && rtd->codec_dais[i]->playback_active == 1) ||
929 (!playback && rtd->codec_dais[i]->capture_active == 1))
930 snd_soc_dai_digital_mute(rtd->codec_dais[i], 1,
931 substream->stream);
932 }
933
934 /* free any machine hw params */
935 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
936 rtd->dai_link->ops->hw_free(substream);
937
938 /* free any DMA resources */
939 if (platform->driver->ops && platform->driver->ops->hw_free)
940 platform->driver->ops->hw_free(substream);
941
942 /* now free hw params for the DAIs */
943 for (i = 0; i < rtd->num_codecs; i++) {
944 codec_dai = rtd->codec_dais[i];
945 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
946 codec_dai->driver->ops->hw_free(substream, codec_dai);
947 }
948
949 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
950 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
951
952 mutex_unlock(&rtd->pcm_mutex);
953 return 0;
954 }
955
956 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
957 {
958 struct snd_soc_pcm_runtime *rtd = substream->private_data;
959 struct snd_soc_platform *platform = rtd->platform;
960 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
961 struct snd_soc_dai *codec_dai;
962 int i, ret;
963
964 for (i = 0; i < rtd->num_codecs; i++) {
965 codec_dai = rtd->codec_dais[i];
966 if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) {
967 ret = codec_dai->driver->ops->trigger(substream,
968 cmd, codec_dai);
969 if (ret < 0)
970 return ret;
971 }
972 }
973
974 if (platform->driver->ops && platform->driver->ops->trigger) {
975 ret = platform->driver->ops->trigger(substream, cmd);
976 if (ret < 0)
977 return ret;
978 }
979
980 if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) {
981 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
982 if (ret < 0)
983 return ret;
984 }
985
986 if (rtd->dai_link->ops && rtd->dai_link->ops->trigger) {
987 ret = rtd->dai_link->ops->trigger(substream, cmd);
988 if (ret < 0)
989 return ret;
990 }
991
992 return 0;
993 }
994
995 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
996 int cmd)
997 {
998 struct snd_soc_pcm_runtime *rtd = substream->private_data;
999 struct snd_soc_platform *platform = rtd->platform;
1000 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1001 struct snd_soc_dai *codec_dai;
1002 int i, ret;
1003
1004 for (i = 0; i < rtd->num_codecs; i++) {
1005 codec_dai = rtd->codec_dais[i];
1006 if (codec_dai->driver->ops &&
1007 codec_dai->driver->ops->bespoke_trigger) {
1008 ret = codec_dai->driver->ops->bespoke_trigger(substream,
1009 cmd, codec_dai);
1010 if (ret < 0)
1011 return ret;
1012 }
1013 }
1014
1015 if (platform->driver->bespoke_trigger) {
1016 ret = platform->driver->bespoke_trigger(substream, cmd);
1017 if (ret < 0)
1018 return ret;
1019 }
1020
1021 if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) {
1022 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1023 if (ret < 0)
1024 return ret;
1025 }
1026 return 0;
1027 }
1028 /*
1029 * soc level wrapper for pointer callback
1030 * If cpu_dai, codec_dai, platform driver has the delay callback, than
1031 * the runtime->delay will be updated accordingly.
1032 */
1033 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1034 {
1035 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1036 struct snd_soc_platform *platform = rtd->platform;
1037 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1038 struct snd_soc_dai *codec_dai;
1039 struct snd_pcm_runtime *runtime = substream->runtime;
1040 snd_pcm_uframes_t offset = 0;
1041 snd_pcm_sframes_t delay = 0;
1042 snd_pcm_sframes_t codec_delay = 0;
1043 int i;
1044
1045 if (platform->driver->ops && platform->driver->ops->pointer)
1046 offset = platform->driver->ops->pointer(substream);
1047
1048 if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay)
1049 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1050
1051 for (i = 0; i < rtd->num_codecs; i++) {
1052 codec_dai = rtd->codec_dais[i];
1053 if (codec_dai->driver->ops && codec_dai->driver->ops->delay)
1054 codec_delay = max(codec_delay,
1055 codec_dai->driver->ops->delay(substream,
1056 codec_dai));
1057 }
1058 delay += codec_delay;
1059
1060 /*
1061 * None of the existing platform drivers implement delay(), so
1062 * for now the codec_dai of first multicodec entry is used
1063 */
1064 if (platform->driver->delay)
1065 delay += platform->driver->delay(substream, rtd->codec_dais[0]);
1066
1067 runtime->delay = delay;
1068
1069 return offset;
1070 }
1071
1072 /* connect a FE and BE */
1073 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1074 struct snd_soc_pcm_runtime *be, int stream)
1075 {
1076 struct snd_soc_dpcm *dpcm;
1077
1078 /* only add new dpcms */
1079 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1080 if (dpcm->be == be && dpcm->fe == fe)
1081 return 0;
1082 }
1083
1084 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1085 if (!dpcm)
1086 return -ENOMEM;
1087
1088 dpcm->be = be;
1089 dpcm->fe = fe;
1090 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1091 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1092 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1093 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1094
1095 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1096 stream ? "capture" : "playback", fe->dai_link->name,
1097 stream ? "<-" : "->", be->dai_link->name);
1098
1099 #ifdef CONFIG_DEBUG_FS
1100 if (fe->debugfs_dpcm_root)
1101 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1102 fe->debugfs_dpcm_root, &dpcm->state);
1103 #endif
1104 return 1;
1105 }
1106
1107 /* reparent a BE onto another FE */
1108 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1109 struct snd_soc_pcm_runtime *be, int stream)
1110 {
1111 struct snd_soc_dpcm *dpcm;
1112 struct snd_pcm_substream *fe_substream, *be_substream;
1113
1114 /* reparent if BE is connected to other FEs */
1115 if (!be->dpcm[stream].users)
1116 return;
1117
1118 be_substream = snd_soc_dpcm_get_substream(be, stream);
1119
1120 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
1121 if (dpcm->fe == fe)
1122 continue;
1123
1124 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1125 stream ? "capture" : "playback",
1126 dpcm->fe->dai_link->name,
1127 stream ? "<-" : "->", dpcm->be->dai_link->name);
1128
1129 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1130 be_substream->runtime = fe_substream->runtime;
1131 break;
1132 }
1133 }
1134
1135 /* disconnect a BE and FE */
1136 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1137 {
1138 struct snd_soc_dpcm *dpcm, *d;
1139
1140 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
1141 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1142 stream ? "capture" : "playback",
1143 dpcm->be->dai_link->name);
1144
1145 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1146 continue;
1147
1148 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1149 stream ? "capture" : "playback", fe->dai_link->name,
1150 stream ? "<-" : "->", dpcm->be->dai_link->name);
1151
1152 /* BEs still alive need new FE */
1153 dpcm_be_reparent(fe, dpcm->be, stream);
1154
1155 #ifdef CONFIG_DEBUG_FS
1156 debugfs_remove(dpcm->debugfs_state);
1157 #endif
1158 list_del(&dpcm->list_be);
1159 list_del(&dpcm->list_fe);
1160 kfree(dpcm);
1161 }
1162 }
1163
1164 /* get BE for DAI widget and stream */
1165 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1166 struct snd_soc_dapm_widget *widget, int stream)
1167 {
1168 struct snd_soc_pcm_runtime *be;
1169 int i, j;
1170
1171 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1172 for (i = 0; i < card->num_links; i++) {
1173 be = &card->rtd[i];
1174
1175 if (!be->dai_link->no_pcm)
1176 continue;
1177
1178 if (be->cpu_dai->playback_widget == widget)
1179 return be;
1180
1181 for (j = 0; j < be->num_codecs; j++) {
1182 struct snd_soc_dai *dai = be->codec_dais[j];
1183 if (dai->playback_widget == widget)
1184 return be;
1185 }
1186 }
1187 } else {
1188
1189 for (i = 0; i < card->num_links; i++) {
1190 be = &card->rtd[i];
1191
1192 if (!be->dai_link->no_pcm)
1193 continue;
1194
1195 if (be->cpu_dai->capture_widget == widget)
1196 return be;
1197
1198 for (j = 0; j < be->num_codecs; j++) {
1199 struct snd_soc_dai *dai = be->codec_dais[j];
1200 if (dai->capture_widget == widget)
1201 return be;
1202 }
1203 }
1204 }
1205
1206 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1207 stream ? "capture" : "playback", widget->name);
1208 return NULL;
1209 }
1210
1211 static inline struct snd_soc_dapm_widget *
1212 dai_get_widget(struct snd_soc_dai *dai, int stream)
1213 {
1214 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1215 return dai->playback_widget;
1216 else
1217 return dai->capture_widget;
1218 }
1219
1220 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1221 struct snd_soc_dapm_widget *widget)
1222 {
1223 int i;
1224
1225 for (i = 0; i < list->num_widgets; i++) {
1226 if (widget == list->widgets[i])
1227 return 1;
1228 }
1229
1230 return 0;
1231 }
1232
1233 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1234 int stream, struct snd_soc_dapm_widget_list **list)
1235 {
1236 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1237 int paths;
1238
1239 /* get number of valid DAI paths and their widgets */
1240 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list);
1241
1242 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1243 stream ? "capture" : "playback");
1244
1245 return paths;
1246 }
1247
1248 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1249 struct snd_soc_dapm_widget_list **list_)
1250 {
1251 struct snd_soc_dpcm *dpcm;
1252 struct snd_soc_dapm_widget_list *list = *list_;
1253 struct snd_soc_dapm_widget *widget;
1254 int prune = 0;
1255
1256 /* Destroy any old FE <--> BE connections */
1257 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1258 unsigned int i;
1259
1260 /* is there a valid CPU DAI widget for this BE */
1261 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1262
1263 /* prune the BE if it's no longer in our active list */
1264 if (widget && widget_in_list(list, widget))
1265 continue;
1266
1267 /* is there a valid CODEC DAI widget for this BE */
1268 for (i = 0; i < dpcm->be->num_codecs; i++) {
1269 struct snd_soc_dai *dai = dpcm->be->codec_dais[i];
1270 widget = dai_get_widget(dai, stream);
1271
1272 /* prune the BE if it's no longer in our active list */
1273 if (widget && widget_in_list(list, widget))
1274 continue;
1275 }
1276
1277 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1278 stream ? "capture" : "playback",
1279 dpcm->be->dai_link->name, fe->dai_link->name);
1280 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1281 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1282 prune++;
1283 }
1284
1285 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1286 return prune;
1287 }
1288
1289 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1290 struct snd_soc_dapm_widget_list **list_)
1291 {
1292 struct snd_soc_card *card = fe->card;
1293 struct snd_soc_dapm_widget_list *list = *list_;
1294 struct snd_soc_pcm_runtime *be;
1295 int i, new = 0, err;
1296
1297 /* Create any new FE <--> BE connections */
1298 for (i = 0; i < list->num_widgets; i++) {
1299
1300 switch (list->widgets[i]->id) {
1301 case snd_soc_dapm_dai_in:
1302 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1303 continue;
1304 break;
1305 case snd_soc_dapm_dai_out:
1306 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1307 continue;
1308 break;
1309 default:
1310 continue;
1311 }
1312
1313 /* is there a valid BE rtd for this widget */
1314 be = dpcm_get_be(card, list->widgets[i], stream);
1315 if (!be) {
1316 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1317 list->widgets[i]->name);
1318 continue;
1319 }
1320
1321 /* make sure BE is a real BE */
1322 if (!be->dai_link->no_pcm)
1323 continue;
1324
1325 /* don't connect if FE is not running */
1326 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1327 continue;
1328
1329 /* newly connected FE and BE */
1330 err = dpcm_be_connect(fe, be, stream);
1331 if (err < 0) {
1332 dev_err(fe->dev, "ASoC: can't connect %s\n",
1333 list->widgets[i]->name);
1334 break;
1335 } else if (err == 0) /* already connected */
1336 continue;
1337
1338 /* new */
1339 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1340 new++;
1341 }
1342
1343 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1344 return new;
1345 }
1346
1347 /*
1348 * Find the corresponding BE DAIs that source or sink audio to this
1349 * FE substream.
1350 */
1351 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1352 int stream, struct snd_soc_dapm_widget_list **list, int new)
1353 {
1354 if (new)
1355 return dpcm_add_paths(fe, stream, list);
1356 else
1357 return dpcm_prune_paths(fe, stream, list);
1358 }
1359
1360 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1361 {
1362 struct snd_soc_dpcm *dpcm;
1363
1364 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1365 dpcm->be->dpcm[stream].runtime_update =
1366 SND_SOC_DPCM_UPDATE_NO;
1367 }
1368
1369 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1370 int stream)
1371 {
1372 struct snd_soc_dpcm *dpcm;
1373
1374 /* disable any enabled and non active backends */
1375 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1376
1377 struct snd_soc_pcm_runtime *be = dpcm->be;
1378 struct snd_pcm_substream *be_substream =
1379 snd_soc_dpcm_get_substream(be, stream);
1380
1381 if (be->dpcm[stream].users == 0)
1382 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1383 stream ? "capture" : "playback",
1384 be->dpcm[stream].state);
1385
1386 if (--be->dpcm[stream].users != 0)
1387 continue;
1388
1389 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1390 continue;
1391
1392 soc_pcm_close(be_substream);
1393 be_substream->runtime = NULL;
1394 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1395 }
1396 }
1397
1398 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1399 {
1400 struct snd_soc_dpcm *dpcm;
1401 int err, count = 0;
1402
1403 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1404 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1405
1406 struct snd_soc_pcm_runtime *be = dpcm->be;
1407 struct snd_pcm_substream *be_substream =
1408 snd_soc_dpcm_get_substream(be, stream);
1409
1410 if (!be_substream) {
1411 dev_err(be->dev, "ASoC: no backend %s stream\n",
1412 stream ? "capture" : "playback");
1413 continue;
1414 }
1415
1416 /* is this op for this BE ? */
1417 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1418 continue;
1419
1420 /* first time the dpcm is open ? */
1421 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1422 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1423 stream ? "capture" : "playback",
1424 be->dpcm[stream].state);
1425
1426 if (be->dpcm[stream].users++ != 0)
1427 continue;
1428
1429 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1430 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1431 continue;
1432
1433 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1434 stream ? "capture" : "playback", be->dai_link->name);
1435
1436 be_substream->runtime = be->dpcm[stream].runtime;
1437 err = soc_pcm_open(be_substream);
1438 if (err < 0) {
1439 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1440 be->dpcm[stream].users--;
1441 if (be->dpcm[stream].users < 0)
1442 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1443 stream ? "capture" : "playback",
1444 be->dpcm[stream].state);
1445
1446 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1447 goto unwind;
1448 }
1449
1450 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1451 count++;
1452 }
1453
1454 return count;
1455
1456 unwind:
1457 /* disable any enabled and non active backends */
1458 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1459 struct snd_soc_pcm_runtime *be = dpcm->be;
1460 struct snd_pcm_substream *be_substream =
1461 snd_soc_dpcm_get_substream(be, stream);
1462
1463 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1464 continue;
1465
1466 if (be->dpcm[stream].users == 0)
1467 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1468 stream ? "capture" : "playback",
1469 be->dpcm[stream].state);
1470
1471 if (--be->dpcm[stream].users != 0)
1472 continue;
1473
1474 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1475 continue;
1476
1477 soc_pcm_close(be_substream);
1478 be_substream->runtime = NULL;
1479 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1480 }
1481
1482 return err;
1483 }
1484
1485 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1486 struct snd_soc_pcm_stream *stream,
1487 u64 formats)
1488 {
1489 runtime->hw.rate_min = stream->rate_min;
1490 runtime->hw.rate_max = stream->rate_max;
1491 runtime->hw.channels_min = stream->channels_min;
1492 runtime->hw.channels_max = stream->channels_max;
1493 if (runtime->hw.formats)
1494 runtime->hw.formats &= formats & stream->formats;
1495 else
1496 runtime->hw.formats = formats & stream->formats;
1497 runtime->hw.rates = stream->rates;
1498 }
1499
1500 static u64 dpcm_runtime_base_format(struct snd_pcm_substream *substream)
1501 {
1502 struct snd_soc_pcm_runtime *fe = substream->private_data;
1503 struct snd_soc_dpcm *dpcm;
1504 u64 formats = ULLONG_MAX;
1505 int stream = substream->stream;
1506
1507 if (!fe->dai_link->dpcm_merged_format)
1508 return formats;
1509
1510 /*
1511 * It returns merged BE codec format
1512 * if FE want to use it (= dpcm_merged_format)
1513 */
1514
1515 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1516 struct snd_soc_pcm_runtime *be = dpcm->be;
1517 struct snd_soc_dai_driver *codec_dai_drv;
1518 struct snd_soc_pcm_stream *codec_stream;
1519 int i;
1520
1521 for (i = 0; i < be->num_codecs; i++) {
1522 codec_dai_drv = be->codec_dais[i]->driver;
1523 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1524 codec_stream = &codec_dai_drv->playback;
1525 else
1526 codec_stream = &codec_dai_drv->capture;
1527
1528 formats &= codec_stream->formats;
1529 }
1530 }
1531
1532 return formats;
1533 }
1534
1535 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1536 {
1537 struct snd_pcm_runtime *runtime = substream->runtime;
1538 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1539 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1540 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1541 u64 format = dpcm_runtime_base_format(substream);
1542
1543 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1544 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback, format);
1545 else
1546 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture, format);
1547 }
1548
1549 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1550
1551 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1552 * for avoiding the race with trigger callback.
1553 * If the state is unset and a trigger is pending while the previous operation,
1554 * process the pending trigger action here.
1555 */
1556 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1557 int stream, enum snd_soc_dpcm_update state)
1558 {
1559 struct snd_pcm_substream *substream =
1560 snd_soc_dpcm_get_substream(fe, stream);
1561
1562 snd_pcm_stream_lock_irq(substream);
1563 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1564 dpcm_fe_dai_do_trigger(substream,
1565 fe->dpcm[stream].trigger_pending - 1);
1566 fe->dpcm[stream].trigger_pending = 0;
1567 }
1568 fe->dpcm[stream].runtime_update = state;
1569 snd_pcm_stream_unlock_irq(substream);
1570 }
1571
1572 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1573 {
1574 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1575 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1576 int stream = fe_substream->stream, ret = 0;
1577
1578 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1579
1580 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1581 if (ret < 0) {
1582 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1583 goto be_err;
1584 }
1585
1586 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1587
1588 /* start the DAI frontend */
1589 ret = soc_pcm_open(fe_substream);
1590 if (ret < 0) {
1591 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1592 goto unwind;
1593 }
1594
1595 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1596
1597 dpcm_set_fe_runtime(fe_substream);
1598 snd_pcm_limit_hw_rates(runtime);
1599
1600 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1601 return 0;
1602
1603 unwind:
1604 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1605 be_err:
1606 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1607 return ret;
1608 }
1609
1610 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1611 {
1612 struct snd_soc_dpcm *dpcm;
1613
1614 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1615 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1616
1617 struct snd_soc_pcm_runtime *be = dpcm->be;
1618 struct snd_pcm_substream *be_substream =
1619 snd_soc_dpcm_get_substream(be, stream);
1620
1621 /* is this op for this BE ? */
1622 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1623 continue;
1624
1625 if (be->dpcm[stream].users == 0)
1626 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1627 stream ? "capture" : "playback",
1628 be->dpcm[stream].state);
1629
1630 if (--be->dpcm[stream].users != 0)
1631 continue;
1632
1633 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1634 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1635 continue;
1636
1637 dev_dbg(be->dev, "ASoC: close BE %s\n",
1638 dpcm->fe->dai_link->name);
1639
1640 soc_pcm_close(be_substream);
1641 be_substream->runtime = NULL;
1642
1643 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1644 }
1645 return 0;
1646 }
1647
1648 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1649 {
1650 struct snd_soc_pcm_runtime *fe = substream->private_data;
1651 int stream = substream->stream;
1652
1653 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1654
1655 /* shutdown the BEs */
1656 dpcm_be_dai_shutdown(fe, substream->stream);
1657
1658 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1659
1660 /* now shutdown the frontend */
1661 soc_pcm_close(substream);
1662
1663 /* run the stream event for each BE */
1664 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1665
1666 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1667 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1668 return 0;
1669 }
1670
1671 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1672 {
1673 struct snd_soc_dpcm *dpcm;
1674
1675 /* only hw_params backends that are either sinks or sources
1676 * to this frontend DAI */
1677 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1678
1679 struct snd_soc_pcm_runtime *be = dpcm->be;
1680 struct snd_pcm_substream *be_substream =
1681 snd_soc_dpcm_get_substream(be, stream);
1682
1683 /* is this op for this BE ? */
1684 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1685 continue;
1686
1687 /* only free hw when no longer used - check all FEs */
1688 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1689 continue;
1690
1691 /* do not free hw if this BE is used by other FE */
1692 if (be->dpcm[stream].users > 1)
1693 continue;
1694
1695 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1696 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1697 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1698 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1699 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1700 continue;
1701
1702 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1703 dpcm->fe->dai_link->name);
1704
1705 soc_pcm_hw_free(be_substream);
1706
1707 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1708 }
1709
1710 return 0;
1711 }
1712
1713 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1714 {
1715 struct snd_soc_pcm_runtime *fe = substream->private_data;
1716 int err, stream = substream->stream;
1717
1718 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1719 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1720
1721 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1722
1723 /* call hw_free on the frontend */
1724 err = soc_pcm_hw_free(substream);
1725 if (err < 0)
1726 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
1727 fe->dai_link->name);
1728
1729 /* only hw_params backends that are either sinks or sources
1730 * to this frontend DAI */
1731 err = dpcm_be_dai_hw_free(fe, stream);
1732
1733 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1734 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1735
1736 mutex_unlock(&fe->card->mutex);
1737 return 0;
1738 }
1739
1740 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1741 {
1742 struct snd_soc_dpcm *dpcm;
1743 int ret;
1744
1745 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1746
1747 struct snd_soc_pcm_runtime *be = dpcm->be;
1748 struct snd_pcm_substream *be_substream =
1749 snd_soc_dpcm_get_substream(be, stream);
1750
1751 /* is this op for this BE ? */
1752 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1753 continue;
1754
1755 /* only allow hw_params() if no connected FEs are running */
1756 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1757 continue;
1758
1759 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1760 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1761 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1762 continue;
1763
1764 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1765 dpcm->fe->dai_link->name);
1766
1767 /* copy params for each dpcm */
1768 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1769 sizeof(struct snd_pcm_hw_params));
1770
1771 /* perform any hw_params fixups */
1772 if (be->dai_link->be_hw_params_fixup) {
1773 ret = be->dai_link->be_hw_params_fixup(be,
1774 &dpcm->hw_params);
1775 if (ret < 0) {
1776 dev_err(be->dev,
1777 "ASoC: hw_params BE fixup failed %d\n",
1778 ret);
1779 goto unwind;
1780 }
1781 }
1782
1783 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1784 if (ret < 0) {
1785 dev_err(dpcm->be->dev,
1786 "ASoC: hw_params BE failed %d\n", ret);
1787 goto unwind;
1788 }
1789
1790 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1791 }
1792 return 0;
1793
1794 unwind:
1795 /* disable any enabled and non active backends */
1796 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1797 struct snd_soc_pcm_runtime *be = dpcm->be;
1798 struct snd_pcm_substream *be_substream =
1799 snd_soc_dpcm_get_substream(be, stream);
1800
1801 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1802 continue;
1803
1804 /* only allow hw_free() if no connected FEs are running */
1805 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1806 continue;
1807
1808 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1809 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1810 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1811 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1812 continue;
1813
1814 soc_pcm_hw_free(be_substream);
1815 }
1816
1817 return ret;
1818 }
1819
1820 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1821 struct snd_pcm_hw_params *params)
1822 {
1823 struct snd_soc_pcm_runtime *fe = substream->private_data;
1824 int ret, stream = substream->stream;
1825
1826 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1827 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1828
1829 memcpy(&fe->dpcm[substream->stream].hw_params, params,
1830 sizeof(struct snd_pcm_hw_params));
1831 ret = dpcm_be_dai_hw_params(fe, substream->stream);
1832 if (ret < 0) {
1833 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
1834 goto out;
1835 }
1836
1837 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1838 fe->dai_link->name, params_rate(params),
1839 params_channels(params), params_format(params));
1840
1841 /* call hw_params on the frontend */
1842 ret = soc_pcm_hw_params(substream, params);
1843 if (ret < 0) {
1844 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
1845 dpcm_be_dai_hw_free(fe, stream);
1846 } else
1847 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1848
1849 out:
1850 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1851 mutex_unlock(&fe->card->mutex);
1852 return ret;
1853 }
1854
1855 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
1856 struct snd_pcm_substream *substream, int cmd)
1857 {
1858 int ret;
1859
1860 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
1861 dpcm->fe->dai_link->name, cmd);
1862
1863 ret = soc_pcm_trigger(substream, cmd);
1864 if (ret < 0)
1865 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
1866
1867 return ret;
1868 }
1869
1870 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
1871 int cmd)
1872 {
1873 struct snd_soc_dpcm *dpcm;
1874 int ret = 0;
1875
1876 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1877
1878 struct snd_soc_pcm_runtime *be = dpcm->be;
1879 struct snd_pcm_substream *be_substream =
1880 snd_soc_dpcm_get_substream(be, stream);
1881
1882 /* is this op for this BE ? */
1883 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1884 continue;
1885
1886 switch (cmd) {
1887 case SNDRV_PCM_TRIGGER_START:
1888 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1889 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1890 continue;
1891
1892 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1893 if (ret)
1894 return ret;
1895
1896 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1897 break;
1898 case SNDRV_PCM_TRIGGER_RESUME:
1899 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1900 continue;
1901
1902 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1903 if (ret)
1904 return ret;
1905
1906 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1907 break;
1908 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1909 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
1910 continue;
1911
1912 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1913 if (ret)
1914 return ret;
1915
1916 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1917 break;
1918 case SNDRV_PCM_TRIGGER_STOP:
1919 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1920 continue;
1921
1922 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1923 continue;
1924
1925 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1926 if (ret)
1927 return ret;
1928
1929 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1930 break;
1931 case SNDRV_PCM_TRIGGER_SUSPEND:
1932 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1933 continue;
1934
1935 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1936 continue;
1937
1938 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1939 if (ret)
1940 return ret;
1941
1942 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
1943 break;
1944 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1945 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1946 continue;
1947
1948 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1949 continue;
1950
1951 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1952 if (ret)
1953 return ret;
1954
1955 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
1956 break;
1957 }
1958 }
1959
1960 return ret;
1961 }
1962 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
1963
1964 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
1965 {
1966 struct snd_soc_pcm_runtime *fe = substream->private_data;
1967 int stream = substream->stream, ret;
1968 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1969
1970 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1971
1972 switch (trigger) {
1973 case SND_SOC_DPCM_TRIGGER_PRE:
1974 /* call trigger on the frontend before the backend. */
1975
1976 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
1977 fe->dai_link->name, cmd);
1978
1979 ret = soc_pcm_trigger(substream, cmd);
1980 if (ret < 0) {
1981 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1982 goto out;
1983 }
1984
1985 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1986 break;
1987 case SND_SOC_DPCM_TRIGGER_POST:
1988 /* call trigger on the frontend after the backend. */
1989
1990 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1991 if (ret < 0) {
1992 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1993 goto out;
1994 }
1995
1996 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
1997 fe->dai_link->name, cmd);
1998
1999 ret = soc_pcm_trigger(substream, cmd);
2000 break;
2001 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2002 /* bespoke trigger() - handles both FE and BEs */
2003
2004 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2005 fe->dai_link->name, cmd);
2006
2007 ret = soc_pcm_bespoke_trigger(substream, cmd);
2008 if (ret < 0) {
2009 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2010 goto out;
2011 }
2012 break;
2013 default:
2014 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2015 fe->dai_link->name);
2016 ret = -EINVAL;
2017 goto out;
2018 }
2019
2020 switch (cmd) {
2021 case SNDRV_PCM_TRIGGER_START:
2022 case SNDRV_PCM_TRIGGER_RESUME:
2023 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2024 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2025 break;
2026 case SNDRV_PCM_TRIGGER_STOP:
2027 case SNDRV_PCM_TRIGGER_SUSPEND:
2028 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2029 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2030 break;
2031 }
2032
2033 out:
2034 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2035 return ret;
2036 }
2037
2038 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2039 {
2040 struct snd_soc_pcm_runtime *fe = substream->private_data;
2041 int stream = substream->stream;
2042
2043 /* if FE's runtime_update is already set, we're in race;
2044 * process this trigger later at exit
2045 */
2046 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2047 fe->dpcm[stream].trigger_pending = cmd + 1;
2048 return 0; /* delayed, assuming it's successful */
2049 }
2050
2051 /* we're alone, let's trigger */
2052 return dpcm_fe_dai_do_trigger(substream, cmd);
2053 }
2054
2055 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2056 {
2057 struct snd_soc_dpcm *dpcm;
2058 int ret = 0;
2059
2060 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2061
2062 struct snd_soc_pcm_runtime *be = dpcm->be;
2063 struct snd_pcm_substream *be_substream =
2064 snd_soc_dpcm_get_substream(be, stream);
2065
2066 /* is this op for this BE ? */
2067 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2068 continue;
2069
2070 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2071 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2072 continue;
2073
2074 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2075 dpcm->fe->dai_link->name);
2076
2077 ret = soc_pcm_prepare(be_substream);
2078 if (ret < 0) {
2079 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2080 ret);
2081 break;
2082 }
2083
2084 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2085 }
2086 return ret;
2087 }
2088
2089 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2090 {
2091 struct snd_soc_pcm_runtime *fe = substream->private_data;
2092 int stream = substream->stream, ret = 0;
2093
2094 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2095
2096 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2097
2098 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2099
2100 /* there is no point preparing this FE if there are no BEs */
2101 if (list_empty(&fe->dpcm[stream].be_clients)) {
2102 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2103 fe->dai_link->name);
2104 ret = -EINVAL;
2105 goto out;
2106 }
2107
2108 ret = dpcm_be_dai_prepare(fe, substream->stream);
2109 if (ret < 0)
2110 goto out;
2111
2112 /* call prepare on the frontend */
2113 ret = soc_pcm_prepare(substream);
2114 if (ret < 0) {
2115 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2116 fe->dai_link->name);
2117 goto out;
2118 }
2119
2120 /* run the stream event for each BE */
2121 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2122 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2123
2124 out:
2125 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2126 mutex_unlock(&fe->card->mutex);
2127
2128 return ret;
2129 }
2130
2131 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2132 unsigned int cmd, void *arg)
2133 {
2134 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2135 struct snd_soc_platform *platform = rtd->platform;
2136
2137 if (platform->driver->ops && platform->driver->ops->ioctl)
2138 return platform->driver->ops->ioctl(substream, cmd, arg);
2139 return snd_pcm_lib_ioctl(substream, cmd, arg);
2140 }
2141
2142 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2143 {
2144 struct snd_pcm_substream *substream =
2145 snd_soc_dpcm_get_substream(fe, stream);
2146 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2147 int err;
2148
2149 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2150 stream ? "capture" : "playback", fe->dai_link->name);
2151
2152 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2153 /* call bespoke trigger - FE takes care of all BE triggers */
2154 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2155 fe->dai_link->name);
2156
2157 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2158 if (err < 0)
2159 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2160 } else {
2161 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2162 fe->dai_link->name);
2163
2164 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2165 if (err < 0)
2166 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2167 }
2168
2169 err = dpcm_be_dai_hw_free(fe, stream);
2170 if (err < 0)
2171 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2172
2173 err = dpcm_be_dai_shutdown(fe, stream);
2174 if (err < 0)
2175 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2176
2177 /* run the stream event for each BE */
2178 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2179
2180 return 0;
2181 }
2182
2183 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2184 {
2185 struct snd_pcm_substream *substream =
2186 snd_soc_dpcm_get_substream(fe, stream);
2187 struct snd_soc_dpcm *dpcm;
2188 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2189 int ret;
2190
2191 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2192 stream ? "capture" : "playback", fe->dai_link->name);
2193
2194 /* Only start the BE if the FE is ready */
2195 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2196 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2197 return -EINVAL;
2198
2199 /* startup must always be called for new BEs */
2200 ret = dpcm_be_dai_startup(fe, stream);
2201 if (ret < 0)
2202 goto disconnect;
2203
2204 /* keep going if FE state is > open */
2205 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2206 return 0;
2207
2208 ret = dpcm_be_dai_hw_params(fe, stream);
2209 if (ret < 0)
2210 goto close;
2211
2212 /* keep going if FE state is > hw_params */
2213 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2214 return 0;
2215
2216
2217 ret = dpcm_be_dai_prepare(fe, stream);
2218 if (ret < 0)
2219 goto hw_free;
2220
2221 /* run the stream event for each BE */
2222 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2223
2224 /* keep going if FE state is > prepare */
2225 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2226 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2227 return 0;
2228
2229 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2230 /* call trigger on the frontend - FE takes care of all BE triggers */
2231 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2232 fe->dai_link->name);
2233
2234 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2235 if (ret < 0) {
2236 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2237 goto hw_free;
2238 }
2239 } else {
2240 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2241 fe->dai_link->name);
2242
2243 ret = dpcm_be_dai_trigger(fe, stream,
2244 SNDRV_PCM_TRIGGER_START);
2245 if (ret < 0) {
2246 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2247 goto hw_free;
2248 }
2249 }
2250
2251 return 0;
2252
2253 hw_free:
2254 dpcm_be_dai_hw_free(fe, stream);
2255 close:
2256 dpcm_be_dai_shutdown(fe, stream);
2257 disconnect:
2258 /* disconnect any non started BEs */
2259 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2260 struct snd_soc_pcm_runtime *be = dpcm->be;
2261 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2262 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2263 }
2264
2265 return ret;
2266 }
2267
2268 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2269 {
2270 int ret;
2271
2272 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2273 ret = dpcm_run_update_startup(fe, stream);
2274 if (ret < 0)
2275 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2276 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2277
2278 return ret;
2279 }
2280
2281 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2282 {
2283 int ret;
2284
2285 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2286 ret = dpcm_run_update_shutdown(fe, stream);
2287 if (ret < 0)
2288 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2289 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2290
2291 return ret;
2292 }
2293
2294 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2295 * any DAI links.
2296 */
2297 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2298 {
2299 int i, old, new, paths;
2300
2301 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2302 for (i = 0; i < card->num_rtd; i++) {
2303 struct snd_soc_dapm_widget_list *list;
2304 struct snd_soc_pcm_runtime *fe = &card->rtd[i];
2305
2306 /* make sure link is FE */
2307 if (!fe->dai_link->dynamic)
2308 continue;
2309
2310 /* only check active links */
2311 if (!fe->cpu_dai->active)
2312 continue;
2313
2314 /* DAPM sync will call this to update DSP paths */
2315 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
2316 fe->dai_link->name);
2317
2318 /* skip if FE doesn't have playback capability */
2319 if (!fe->cpu_dai->driver->playback.channels_min
2320 || !fe->codec_dai->driver->playback.channels_min)
2321 goto capture;
2322
2323 /* skip if FE isn't currently playing */
2324 if (!fe->cpu_dai->playback_active
2325 || !fe->codec_dai->playback_active)
2326 goto capture;
2327
2328 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2329 if (paths < 0) {
2330 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2331 fe->dai_link->name, "playback");
2332 mutex_unlock(&card->mutex);
2333 return paths;
2334 }
2335
2336 /* update any new playback paths */
2337 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
2338 if (new) {
2339 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2340 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2341 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2342 }
2343
2344 /* update any old playback paths */
2345 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
2346 if (old) {
2347 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2348 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2349 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2350 }
2351
2352 dpcm_path_put(&list);
2353 capture:
2354 /* skip if FE doesn't have capture capability */
2355 if (!fe->cpu_dai->driver->capture.channels_min
2356 || !fe->codec_dai->driver->capture.channels_min)
2357 continue;
2358
2359 /* skip if FE isn't currently capturing */
2360 if (!fe->cpu_dai->capture_active
2361 || !fe->codec_dai->capture_active)
2362 continue;
2363
2364 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2365 if (paths < 0) {
2366 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2367 fe->dai_link->name, "capture");
2368 mutex_unlock(&card->mutex);
2369 return paths;
2370 }
2371
2372 /* update any new capture paths */
2373 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
2374 if (new) {
2375 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2376 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2377 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2378 }
2379
2380 /* update any old capture paths */
2381 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
2382 if (old) {
2383 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2384 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2385 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2386 }
2387
2388 dpcm_path_put(&list);
2389 }
2390
2391 mutex_unlock(&card->mutex);
2392 return 0;
2393 }
2394 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2395 {
2396 struct snd_soc_dpcm *dpcm;
2397 struct list_head *clients =
2398 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
2399
2400 list_for_each_entry(dpcm, clients, list_be) {
2401
2402 struct snd_soc_pcm_runtime *be = dpcm->be;
2403 int i;
2404
2405 if (be->dai_link->ignore_suspend)
2406 continue;
2407
2408 for (i = 0; i < be->num_codecs; i++) {
2409 struct snd_soc_dai *dai = be->codec_dais[i];
2410 struct snd_soc_dai_driver *drv = dai->driver;
2411
2412 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2413 be->dai_link->name);
2414
2415 if (drv->ops && drv->ops->digital_mute &&
2416 dai->playback_active)
2417 drv->ops->digital_mute(dai, mute);
2418 }
2419 }
2420
2421 return 0;
2422 }
2423
2424 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2425 {
2426 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2427 struct snd_soc_dpcm *dpcm;
2428 struct snd_soc_dapm_widget_list *list;
2429 int ret;
2430 int stream = fe_substream->stream;
2431
2432 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2433 fe->dpcm[stream].runtime = fe_substream->runtime;
2434
2435 ret = dpcm_path_get(fe, stream, &list);
2436 if (ret < 0) {
2437 mutex_unlock(&fe->card->mutex);
2438 return ret;
2439 } else if (ret == 0) {
2440 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2441 fe->dai_link->name, stream ? "capture" : "playback");
2442 }
2443
2444 /* calculate valid and active FE <-> BE dpcms */
2445 dpcm_process_paths(fe, stream, &list, 1);
2446
2447 ret = dpcm_fe_dai_startup(fe_substream);
2448 if (ret < 0) {
2449 /* clean up all links */
2450 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2451 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2452
2453 dpcm_be_disconnect(fe, stream);
2454 fe->dpcm[stream].runtime = NULL;
2455 }
2456
2457 dpcm_clear_pending_state(fe, stream);
2458 dpcm_path_put(&list);
2459 mutex_unlock(&fe->card->mutex);
2460 return ret;
2461 }
2462
2463 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2464 {
2465 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2466 struct snd_soc_dpcm *dpcm;
2467 int stream = fe_substream->stream, ret;
2468
2469 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2470 ret = dpcm_fe_dai_shutdown(fe_substream);
2471
2472 /* mark FE's links ready to prune */
2473 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2474 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2475
2476 dpcm_be_disconnect(fe, stream);
2477
2478 fe->dpcm[stream].runtime = NULL;
2479 mutex_unlock(&fe->card->mutex);
2480 return ret;
2481 }
2482
2483 /* create a new pcm */
2484 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2485 {
2486 struct snd_soc_platform *platform = rtd->platform;
2487 struct snd_soc_dai *codec_dai;
2488 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2489 struct snd_pcm *pcm;
2490 char new_name[64];
2491 int ret = 0, playback = 0, capture = 0;
2492 int i;
2493
2494 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2495 playback = rtd->dai_link->dpcm_playback;
2496 capture = rtd->dai_link->dpcm_capture;
2497 } else {
2498 for (i = 0; i < rtd->num_codecs; i++) {
2499 codec_dai = rtd->codec_dais[i];
2500 if (codec_dai->driver->playback.channels_min)
2501 playback = 1;
2502 if (codec_dai->driver->capture.channels_min)
2503 capture = 1;
2504 }
2505
2506 capture = capture && cpu_dai->driver->capture.channels_min;
2507 playback = playback && cpu_dai->driver->playback.channels_min;
2508 }
2509
2510 if (rtd->dai_link->playback_only) {
2511 playback = 1;
2512 capture = 0;
2513 }
2514
2515 if (rtd->dai_link->capture_only) {
2516 playback = 0;
2517 capture = 1;
2518 }
2519
2520 /* create the PCM */
2521 if (rtd->dai_link->no_pcm) {
2522 snprintf(new_name, sizeof(new_name), "(%s)",
2523 rtd->dai_link->stream_name);
2524
2525 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2526 playback, capture, &pcm);
2527 } else {
2528 if (rtd->dai_link->dynamic)
2529 snprintf(new_name, sizeof(new_name), "%s (*)",
2530 rtd->dai_link->stream_name);
2531 else
2532 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2533 rtd->dai_link->stream_name,
2534 (rtd->num_codecs > 1) ?
2535 "multicodec" : rtd->codec_dai->name, num);
2536
2537 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2538 capture, &pcm);
2539 }
2540 if (ret < 0) {
2541 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2542 rtd->dai_link->name);
2543 return ret;
2544 }
2545 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2546
2547 /* DAPM dai link stream work */
2548 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2549
2550 pcm->nonatomic = rtd->dai_link->nonatomic;
2551 rtd->pcm = pcm;
2552 pcm->private_data = rtd;
2553
2554 if (rtd->dai_link->no_pcm) {
2555 if (playback)
2556 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2557 if (capture)
2558 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2559 goto out;
2560 }
2561
2562 /* ASoC PCM operations */
2563 if (rtd->dai_link->dynamic) {
2564 rtd->ops.open = dpcm_fe_dai_open;
2565 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2566 rtd->ops.prepare = dpcm_fe_dai_prepare;
2567 rtd->ops.trigger = dpcm_fe_dai_trigger;
2568 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2569 rtd->ops.close = dpcm_fe_dai_close;
2570 rtd->ops.pointer = soc_pcm_pointer;
2571 rtd->ops.ioctl = soc_pcm_ioctl;
2572 } else {
2573 rtd->ops.open = soc_pcm_open;
2574 rtd->ops.hw_params = soc_pcm_hw_params;
2575 rtd->ops.prepare = soc_pcm_prepare;
2576 rtd->ops.trigger = soc_pcm_trigger;
2577 rtd->ops.hw_free = soc_pcm_hw_free;
2578 rtd->ops.close = soc_pcm_close;
2579 rtd->ops.pointer = soc_pcm_pointer;
2580 rtd->ops.ioctl = soc_pcm_ioctl;
2581 }
2582
2583 if (platform->driver->ops) {
2584 rtd->ops.ack = platform->driver->ops->ack;
2585 rtd->ops.copy = platform->driver->ops->copy;
2586 rtd->ops.silence = platform->driver->ops->silence;
2587 rtd->ops.page = platform->driver->ops->page;
2588 rtd->ops.mmap = platform->driver->ops->mmap;
2589 }
2590
2591 if (playback)
2592 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2593
2594 if (capture)
2595 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2596
2597 if (platform->driver->pcm_new) {
2598 ret = platform->driver->pcm_new(rtd);
2599 if (ret < 0) {
2600 dev_err(platform->dev,
2601 "ASoC: pcm constructor failed: %d\n",
2602 ret);
2603 return ret;
2604 }
2605 }
2606
2607 pcm->private_free = platform->driver->pcm_free;
2608 out:
2609 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
2610 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
2611 cpu_dai->name);
2612 return ret;
2613 }
2614
2615 /* is the current PCM operation for this FE ? */
2616 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2617 {
2618 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2619 return 1;
2620 return 0;
2621 }
2622 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2623
2624 /* is the current PCM operation for this BE ? */
2625 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2626 struct snd_soc_pcm_runtime *be, int stream)
2627 {
2628 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2629 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2630 be->dpcm[stream].runtime_update))
2631 return 1;
2632 return 0;
2633 }
2634 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2635
2636 /* get the substream for this BE */
2637 struct snd_pcm_substream *
2638 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2639 {
2640 return be->pcm->streams[stream].substream;
2641 }
2642 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2643
2644 /* get the BE runtime state */
2645 enum snd_soc_dpcm_state
2646 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2647 {
2648 return be->dpcm[stream].state;
2649 }
2650 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
2651
2652 /* set the BE runtime state */
2653 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
2654 int stream, enum snd_soc_dpcm_state state)
2655 {
2656 be->dpcm[stream].state = state;
2657 }
2658 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
2659
2660 /*
2661 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2662 * are not running, paused or suspended for the specified stream direction.
2663 */
2664 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2665 struct snd_soc_pcm_runtime *be, int stream)
2666 {
2667 struct snd_soc_dpcm *dpcm;
2668 int state;
2669
2670 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2671
2672 if (dpcm->fe == fe)
2673 continue;
2674
2675 state = dpcm->fe->dpcm[stream].state;
2676 if (state == SND_SOC_DPCM_STATE_START ||
2677 state == SND_SOC_DPCM_STATE_PAUSED ||
2678 state == SND_SOC_DPCM_STATE_SUSPEND)
2679 return 0;
2680 }
2681
2682 /* it's safe to free/stop this BE DAI */
2683 return 1;
2684 }
2685 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2686
2687 /*
2688 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2689 * running, paused or suspended for the specified stream direction.
2690 */
2691 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2692 struct snd_soc_pcm_runtime *be, int stream)
2693 {
2694 struct snd_soc_dpcm *dpcm;
2695 int state;
2696
2697 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2698
2699 if (dpcm->fe == fe)
2700 continue;
2701
2702 state = dpcm->fe->dpcm[stream].state;
2703 if (state == SND_SOC_DPCM_STATE_START ||
2704 state == SND_SOC_DPCM_STATE_PAUSED ||
2705 state == SND_SOC_DPCM_STATE_SUSPEND ||
2706 state == SND_SOC_DPCM_STATE_PREPARE)
2707 return 0;
2708 }
2709
2710 /* it's safe to change hw_params */
2711 return 1;
2712 }
2713 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2714
2715 int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
2716 int cmd, struct snd_soc_platform *platform)
2717 {
2718 if (platform->driver->ops && platform->driver->ops->trigger)
2719 return platform->driver->ops->trigger(substream, cmd);
2720 return 0;
2721 }
2722 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger);
2723
2724 #ifdef CONFIG_DEBUG_FS
2725 static char *dpcm_state_string(enum snd_soc_dpcm_state state)
2726 {
2727 switch (state) {
2728 case SND_SOC_DPCM_STATE_NEW:
2729 return "new";
2730 case SND_SOC_DPCM_STATE_OPEN:
2731 return "open";
2732 case SND_SOC_DPCM_STATE_HW_PARAMS:
2733 return "hw_params";
2734 case SND_SOC_DPCM_STATE_PREPARE:
2735 return "prepare";
2736 case SND_SOC_DPCM_STATE_START:
2737 return "start";
2738 case SND_SOC_DPCM_STATE_STOP:
2739 return "stop";
2740 case SND_SOC_DPCM_STATE_SUSPEND:
2741 return "suspend";
2742 case SND_SOC_DPCM_STATE_PAUSED:
2743 return "paused";
2744 case SND_SOC_DPCM_STATE_HW_FREE:
2745 return "hw_free";
2746 case SND_SOC_DPCM_STATE_CLOSE:
2747 return "close";
2748 }
2749
2750 return "unknown";
2751 }
2752
2753 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2754 int stream, char *buf, size_t size)
2755 {
2756 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2757 struct snd_soc_dpcm *dpcm;
2758 ssize_t offset = 0;
2759
2760 /* FE state */
2761 offset += snprintf(buf + offset, size - offset,
2762 "[%s - %s]\n", fe->dai_link->name,
2763 stream ? "Capture" : "Playback");
2764
2765 offset += snprintf(buf + offset, size - offset, "State: %s\n",
2766 dpcm_state_string(fe->dpcm[stream].state));
2767
2768 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2769 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2770 offset += snprintf(buf + offset, size - offset,
2771 "Hardware Params: "
2772 "Format = %s, Channels = %d, Rate = %d\n",
2773 snd_pcm_format_name(params_format(params)),
2774 params_channels(params),
2775 params_rate(params));
2776
2777 /* BEs state */
2778 offset += snprintf(buf + offset, size - offset, "Backends:\n");
2779
2780 if (list_empty(&fe->dpcm[stream].be_clients)) {
2781 offset += snprintf(buf + offset, size - offset,
2782 " No active DSP links\n");
2783 goto out;
2784 }
2785
2786 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2787 struct snd_soc_pcm_runtime *be = dpcm->be;
2788 params = &dpcm->hw_params;
2789
2790 offset += snprintf(buf + offset, size - offset,
2791 "- %s\n", be->dai_link->name);
2792
2793 offset += snprintf(buf + offset, size - offset,
2794 " State: %s\n",
2795 dpcm_state_string(be->dpcm[stream].state));
2796
2797 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2798 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2799 offset += snprintf(buf + offset, size - offset,
2800 " Hardware Params: "
2801 "Format = %s, Channels = %d, Rate = %d\n",
2802 snd_pcm_format_name(params_format(params)),
2803 params_channels(params),
2804 params_rate(params));
2805 }
2806
2807 out:
2808 return offset;
2809 }
2810
2811 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
2812 size_t count, loff_t *ppos)
2813 {
2814 struct snd_soc_pcm_runtime *fe = file->private_data;
2815 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
2816 char *buf;
2817
2818 buf = kmalloc(out_count, GFP_KERNEL);
2819 if (!buf)
2820 return -ENOMEM;
2821
2822 if (fe->cpu_dai->driver->playback.channels_min)
2823 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
2824 buf + offset, out_count - offset);
2825
2826 if (fe->cpu_dai->driver->capture.channels_min)
2827 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
2828 buf + offset, out_count - offset);
2829
2830 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
2831
2832 kfree(buf);
2833 return ret;
2834 }
2835
2836 static const struct file_operations dpcm_state_fops = {
2837 .open = simple_open,
2838 .read = dpcm_state_read_file,
2839 .llseek = default_llseek,
2840 };
2841
2842 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
2843 {
2844 if (!rtd->dai_link)
2845 return;
2846
2847 if (!rtd->card->debugfs_card_root)
2848 return;
2849
2850 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
2851 rtd->card->debugfs_card_root);
2852 if (!rtd->debugfs_dpcm_root) {
2853 dev_dbg(rtd->dev,
2854 "ASoC: Failed to create dpcm debugfs directory %s\n",
2855 rtd->dai_link->name);
2856 return;
2857 }
2858
2859 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
2860 rtd->debugfs_dpcm_root,
2861 rtd, &dpcm_state_fops);
2862 }
2863 #endif
Linux kernel - Deliverables
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