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