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zram: use DEVICE_ATTR_[RW|RO|WO] to define zram sys device attribute
[linux/fpc-iii.git] / sound / soc / soc-pcm.c
blobeb87d96e2cf0a8807e34a9859918a5c672d17981
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 /*
305 * List of sample sizes that might go over the bus for parameter
306 * application. There ought to be a wildcard sample size for things
307 * like the DAC/ADC resolution to use but there isn't right now.
308 */
309 static int sample_sizes[] = {
310 24, 32,
311 };
312
313 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
314 {
315 struct snd_soc_pcm_runtime *rtd = substream->private_data;
316 int ret, i;
317
318 if (!bits)
319 return;
320
321 for (i = 0; i < ARRAY_SIZE(sample_sizes); i++) {
322 if (bits >= sample_sizes[i])
323 continue;
324
325 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0,
326 sample_sizes[i], bits);
327 if (ret != 0)
328 dev_warn(rtd->dev,
329 "ASoC: Failed to set MSB %d/%d: %d\n",
330 bits, sample_sizes[i], ret);
331 }
332 }
333
334 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
335 {
336 struct snd_soc_pcm_runtime *rtd = substream->private_data;
337 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
338 struct snd_soc_dai *codec_dai;
339 int i;
340 unsigned int bits = 0, cpu_bits;
341
342 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
343 for (i = 0; i < rtd->num_codecs; i++) {
344 codec_dai = rtd->codec_dais[i];
345 if (codec_dai->driver->playback.sig_bits == 0) {
346 bits = 0;
347 break;
348 }
349 bits = max(codec_dai->driver->playback.sig_bits, bits);
350 }
351 cpu_bits = cpu_dai->driver->playback.sig_bits;
352 } else {
353 for (i = 0; i < rtd->num_codecs; i++) {
354 codec_dai = rtd->codec_dais[i];
355 if (codec_dai->driver->capture.sig_bits == 0) {
356 bits = 0;
357 break;
358 }
359 bits = max(codec_dai->driver->capture.sig_bits, bits);
360 }
361 cpu_bits = cpu_dai->driver->capture.sig_bits;
362 }
363
364 soc_pcm_set_msb(substream, bits);
365 soc_pcm_set_msb(substream, cpu_bits);
366 }
367
368 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
369 {
370 struct snd_pcm_runtime *runtime = substream->runtime;
371 struct snd_pcm_hardware *hw = &runtime->hw;
372 struct snd_soc_pcm_runtime *rtd = substream->private_data;
373 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
374 struct snd_soc_dai_driver *codec_dai_drv;
375 struct snd_soc_pcm_stream *codec_stream;
376 struct snd_soc_pcm_stream *cpu_stream;
377 unsigned int chan_min = 0, chan_max = UINT_MAX;
378 unsigned int rate_min = 0, rate_max = UINT_MAX;
379 unsigned int rates = UINT_MAX;
380 u64 formats = ULLONG_MAX;
381 int i;
382
383 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
384 cpu_stream = &cpu_dai_drv->playback;
385 else
386 cpu_stream = &cpu_dai_drv->capture;
387
388 /* first calculate min/max only for CODECs in the DAI link */
389 for (i = 0; i < rtd->num_codecs; i++) {
390 codec_dai_drv = rtd->codec_dais[i]->driver;
391 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
392 codec_stream = &codec_dai_drv->playback;
393 else
394 codec_stream = &codec_dai_drv->capture;
395 chan_min = max(chan_min, codec_stream->channels_min);
396 chan_max = min(chan_max, codec_stream->channels_max);
397 rate_min = max(rate_min, codec_stream->rate_min);
398 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
399 formats &= codec_stream->formats;
400 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
401 }
402
403 /*
404 * chan min/max cannot be enforced if there are multiple CODEC DAIs
405 * connected to a single CPU DAI, use CPU DAI's directly and let
406 * channel allocation be fixed up later
407 */
408 if (rtd->num_codecs > 1) {
409 chan_min = cpu_stream->channels_min;
410 chan_max = cpu_stream->channels_max;
411 }
412
413 hw->channels_min = max(chan_min, cpu_stream->channels_min);
414 hw->channels_max = min(chan_max, cpu_stream->channels_max);
415 if (hw->formats)
416 hw->formats &= formats & cpu_stream->formats;
417 else
418 hw->formats = formats & cpu_stream->formats;
419 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
420
421 snd_pcm_limit_hw_rates(runtime);
422
423 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
424 hw->rate_min = max(hw->rate_min, rate_min);
425 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
426 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
427 }
428
429 /*
430 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
431 * then initialized and any private data can be allocated. This also calls
432 * startup for the cpu DAI, platform, machine and codec DAI.
433 */
434 static int soc_pcm_open(struct snd_pcm_substream *substream)
435 {
436 struct snd_soc_pcm_runtime *rtd = substream->private_data;
437 struct snd_pcm_runtime *runtime = substream->runtime;
438 struct snd_soc_platform *platform = rtd->platform;
439 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
440 struct snd_soc_dai *codec_dai;
441 const char *codec_dai_name = "multicodec";
442 int i, ret = 0;
443
444 pinctrl_pm_select_default_state(cpu_dai->dev);
445 for (i = 0; i < rtd->num_codecs; i++)
446 pinctrl_pm_select_default_state(rtd->codec_dais[i]->dev);
447 pm_runtime_get_sync(cpu_dai->dev);
448 for (i = 0; i < rtd->num_codecs; i++)
449 pm_runtime_get_sync(rtd->codec_dais[i]->dev);
450 pm_runtime_get_sync(platform->dev);
451
452 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
453
454 /* startup the audio subsystem */
455 if (cpu_dai->driver->ops && cpu_dai->driver->ops->startup) {
456 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
457 if (ret < 0) {
458 dev_err(cpu_dai->dev, "ASoC: can't open interface"
459 " %s: %d\n", cpu_dai->name, ret);
460 goto out;
461 }
462 }
463
464 if (platform->driver->ops && platform->driver->ops->open) {
465 ret = platform->driver->ops->open(substream);
466 if (ret < 0) {
467 dev_err(platform->dev, "ASoC: can't open platform"
468 " %s: %d\n", platform->component.name, ret);
469 goto platform_err;
470 }
471 }
472
473 for (i = 0; i < rtd->num_codecs; i++) {
474 codec_dai = rtd->codec_dais[i];
475 if (codec_dai->driver->ops && codec_dai->driver->ops->startup) {
476 ret = codec_dai->driver->ops->startup(substream,
477 codec_dai);
478 if (ret < 0) {
479 dev_err(codec_dai->dev,
480 "ASoC: can't open codec %s: %d\n",
481 codec_dai->name, ret);
482 goto codec_dai_err;
483 }
484 }
485
486 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
487 codec_dai->tx_mask = 0;
488 else
489 codec_dai->rx_mask = 0;
490 }
491
492 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
493 ret = rtd->dai_link->ops->startup(substream);
494 if (ret < 0) {
495 pr_err("ASoC: %s startup failed: %d\n",
496 rtd->dai_link->name, ret);
497 goto machine_err;
498 }
499 }
500
501 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
502 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
503 goto dynamic;
504
505 /* Check that the codec and cpu DAIs are compatible */
506 soc_pcm_init_runtime_hw(substream);
507
508 if (rtd->num_codecs == 1)
509 codec_dai_name = rtd->codec_dai->name;
510
511 if (soc_pcm_has_symmetry(substream))
512 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
513
514 ret = -EINVAL;
515 if (!runtime->hw.rates) {
516 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
517 codec_dai_name, cpu_dai->name);
518 goto config_err;
519 }
520 if (!runtime->hw.formats) {
521 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
522 codec_dai_name, cpu_dai->name);
523 goto config_err;
524 }
525 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
526 runtime->hw.channels_min > runtime->hw.channels_max) {
527 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
528 codec_dai_name, cpu_dai->name);
529 goto config_err;
530 }
531
532 soc_pcm_apply_msb(substream);
533
534 /* Symmetry only applies if we've already got an active stream. */
535 if (cpu_dai->active) {
536 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
537 if (ret != 0)
538 goto config_err;
539 }
540
541 for (i = 0; i < rtd->num_codecs; i++) {
542 if (rtd->codec_dais[i]->active) {
543 ret = soc_pcm_apply_symmetry(substream,
544 rtd->codec_dais[i]);
545 if (ret != 0)
546 goto config_err;
547 }
548 }
549
550 pr_debug("ASoC: %s <-> %s info:\n",
551 codec_dai_name, cpu_dai->name);
552 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
553 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
554 runtime->hw.channels_max);
555 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
556 runtime->hw.rate_max);
557
558 dynamic:
559
560 snd_soc_runtime_activate(rtd, substream->stream);
561
562 mutex_unlock(&rtd->pcm_mutex);
563 return 0;
564
565 config_err:
566 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
567 rtd->dai_link->ops->shutdown(substream);
568
569 machine_err:
570 i = rtd->num_codecs;
571
572 codec_dai_err:
573 while (--i >= 0) {
574 codec_dai = rtd->codec_dais[i];
575 if (codec_dai->driver->ops->shutdown)
576 codec_dai->driver->ops->shutdown(substream, codec_dai);
577 }
578
579 if (platform->driver->ops && platform->driver->ops->close)
580 platform->driver->ops->close(substream);
581
582 platform_err:
583 if (cpu_dai->driver->ops->shutdown)
584 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
585 out:
586 mutex_unlock(&rtd->pcm_mutex);
587
588 pm_runtime_put(platform->dev);
589 for (i = 0; i < rtd->num_codecs; i++)
590 pm_runtime_put(rtd->codec_dais[i]->dev);
591 pm_runtime_put(cpu_dai->dev);
592 for (i = 0; i < rtd->num_codecs; i++) {
593 if (!rtd->codec_dais[i]->active)
594 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
595 }
596 if (!cpu_dai->active)
597 pinctrl_pm_select_sleep_state(cpu_dai->dev);
598
599 return ret;
600 }
601
602 /*
603 * Power down the audio subsystem pmdown_time msecs after close is called.
604 * This is to ensure there are no pops or clicks in between any music tracks
605 * due to DAPM power cycling.
606 */
607 static void close_delayed_work(struct work_struct *work)
608 {
609 struct snd_soc_pcm_runtime *rtd =
610 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
611 struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
612
613 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
614
615 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
616 codec_dai->driver->playback.stream_name,
617 codec_dai->playback_active ? "active" : "inactive",
618 rtd->pop_wait ? "yes" : "no");
619
620 /* are we waiting on this codec DAI stream */
621 if (rtd->pop_wait == 1) {
622 rtd->pop_wait = 0;
623 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
624 SND_SOC_DAPM_STREAM_STOP);
625 }
626
627 mutex_unlock(&rtd->pcm_mutex);
628 }
629
630 /*
631 * Called by ALSA when a PCM substream is closed. Private data can be
632 * freed here. The cpu DAI, codec DAI, machine and platform are also
633 * shutdown.
634 */
635 static int soc_pcm_close(struct snd_pcm_substream *substream)
636 {
637 struct snd_soc_pcm_runtime *rtd = substream->private_data;
638 struct snd_soc_platform *platform = rtd->platform;
639 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
640 struct snd_soc_dai *codec_dai;
641 int i;
642
643 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
644
645 snd_soc_runtime_deactivate(rtd, substream->stream);
646
647 /* clear the corresponding DAIs rate when inactive */
648 if (!cpu_dai->active)
649 cpu_dai->rate = 0;
650
651 for (i = 0; i < rtd->num_codecs; i++) {
652 codec_dai = rtd->codec_dais[i];
653 if (!codec_dai->active)
654 codec_dai->rate = 0;
655 }
656
657 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
658
659 if (cpu_dai->driver->ops->shutdown)
660 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
661
662 for (i = 0; i < rtd->num_codecs; i++) {
663 codec_dai = rtd->codec_dais[i];
664 if (codec_dai->driver->ops->shutdown)
665 codec_dai->driver->ops->shutdown(substream, codec_dai);
666 }
667
668 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
669 rtd->dai_link->ops->shutdown(substream);
670
671 if (platform->driver->ops && platform->driver->ops->close)
672 platform->driver->ops->close(substream);
673
674 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
675 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
676 /* powered down playback stream now */
677 snd_soc_dapm_stream_event(rtd,
678 SNDRV_PCM_STREAM_PLAYBACK,
679 SND_SOC_DAPM_STREAM_STOP);
680 } else {
681 /* start delayed pop wq here for playback streams */
682 rtd->pop_wait = 1;
683 queue_delayed_work(system_power_efficient_wq,
684 &rtd->delayed_work,
685 msecs_to_jiffies(rtd->pmdown_time));
686 }
687 } else {
688 /* capture streams can be powered down now */
689 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
690 SND_SOC_DAPM_STREAM_STOP);
691 }
692
693 mutex_unlock(&rtd->pcm_mutex);
694
695 pm_runtime_put(platform->dev);
696 for (i = 0; i < rtd->num_codecs; i++)
697 pm_runtime_put(rtd->codec_dais[i]->dev);
698 pm_runtime_put(cpu_dai->dev);
699 for (i = 0; i < rtd->num_codecs; i++) {
700 if (!rtd->codec_dais[i]->active)
701 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
702 }
703 if (!cpu_dai->active)
704 pinctrl_pm_select_sleep_state(cpu_dai->dev);
705
706 return 0;
707 }
708
709 /*
710 * Called by ALSA when the PCM substream is prepared, can set format, sample
711 * rate, etc. This function is non atomic and can be called multiple times,
712 * it can refer to the runtime info.
713 */
714 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
715 {
716 struct snd_soc_pcm_runtime *rtd = substream->private_data;
717 struct snd_soc_platform *platform = rtd->platform;
718 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
719 struct snd_soc_dai *codec_dai;
720 int i, ret = 0;
721
722 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
723
724 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
725 ret = rtd->dai_link->ops->prepare(substream);
726 if (ret < 0) {
727 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
728 " %d\n", ret);
729 goto out;
730 }
731 }
732
733 if (platform->driver->ops && platform->driver->ops->prepare) {
734 ret = platform->driver->ops->prepare(substream);
735 if (ret < 0) {
736 dev_err(platform->dev, "ASoC: platform prepare error:"
737 " %d\n", ret);
738 goto out;
739 }
740 }
741
742 for (i = 0; i < rtd->num_codecs; i++) {
743 codec_dai = rtd->codec_dais[i];
744 if (codec_dai->driver->ops && codec_dai->driver->ops->prepare) {
745 ret = codec_dai->driver->ops->prepare(substream,
746 codec_dai);
747 if (ret < 0) {
748 dev_err(codec_dai->dev,
749 "ASoC: DAI prepare error: %d\n", ret);
750 goto out;
751 }
752 }
753 }
754
755 if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) {
756 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
757 if (ret < 0) {
758 dev_err(cpu_dai->dev, "ASoC: DAI prepare error: %d\n",
759 ret);
760 goto out;
761 }
762 }
763
764 /* cancel any delayed stream shutdown that is pending */
765 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
766 rtd->pop_wait) {
767 rtd->pop_wait = 0;
768 cancel_delayed_work(&rtd->delayed_work);
769 }
770
771 snd_soc_dapm_stream_event(rtd, substream->stream,
772 SND_SOC_DAPM_STREAM_START);
773
774 for (i = 0; i < rtd->num_codecs; i++)
775 snd_soc_dai_digital_mute(rtd->codec_dais[i], 0,
776 substream->stream);
777 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
778
779 out:
780 mutex_unlock(&rtd->pcm_mutex);
781 return ret;
782 }
783
784 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
785 unsigned int mask)
786 {
787 struct snd_interval *interval;
788 int channels = hweight_long(mask);
789
790 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
791 interval->min = channels;
792 interval->max = channels;
793 }
794
795 int soc_dai_hw_params(struct snd_pcm_substream *substream,
796 struct snd_pcm_hw_params *params,
797 struct snd_soc_dai *dai)
798 {
799 int ret;
800
801 if (dai->driver->ops && dai->driver->ops->hw_params) {
802 ret = dai->driver->ops->hw_params(substream, params, dai);
803 if (ret < 0) {
804 dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
805 dai->name, ret);
806 return ret;
807 }
808 }
809
810 return 0;
811 }
812
813 /*
814 * Called by ALSA when the hardware params are set by application. This
815 * function can also be called multiple times and can allocate buffers
816 * (using snd_pcm_lib_* ). It's non-atomic.
817 */
818 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
819 struct snd_pcm_hw_params *params)
820 {
821 struct snd_soc_pcm_runtime *rtd = substream->private_data;
822 struct snd_soc_platform *platform = rtd->platform;
823 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
824 int i, ret = 0;
825
826 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
827
828 ret = soc_pcm_params_symmetry(substream, params);
829 if (ret)
830 goto out;
831
832 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
833 ret = rtd->dai_link->ops->hw_params(substream, params);
834 if (ret < 0) {
835 dev_err(rtd->card->dev, "ASoC: machine hw_params"
836 " failed: %d\n", ret);
837 goto out;
838 }
839 }
840
841 for (i = 0; i < rtd->num_codecs; i++) {
842 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
843 struct snd_pcm_hw_params codec_params;
844
845 /* copy params for each codec */
846 codec_params = *params;
847
848 /* fixup params based on TDM slot masks */
849 if (codec_dai->tx_mask)
850 soc_pcm_codec_params_fixup(&codec_params,
851 codec_dai->tx_mask);
852 if (codec_dai->rx_mask)
853 soc_pcm_codec_params_fixup(&codec_params,
854 codec_dai->rx_mask);
855
856 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
857 if(ret < 0)
858 goto codec_err;
859
860 codec_dai->rate = params_rate(&codec_params);
861 codec_dai->channels = params_channels(&codec_params);
862 codec_dai->sample_bits = snd_pcm_format_physical_width(
863 params_format(&codec_params));
864 }
865
866 ret = soc_dai_hw_params(substream, params, cpu_dai);
867 if (ret < 0)
868 goto interface_err;
869
870 if (platform->driver->ops && platform->driver->ops->hw_params) {
871 ret = platform->driver->ops->hw_params(substream, params);
872 if (ret < 0) {
873 dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
874 platform->component.name, ret);
875 goto platform_err;
876 }
877 }
878
879 /* store the parameters for each DAIs */
880 cpu_dai->rate = params_rate(params);
881 cpu_dai->channels = params_channels(params);
882 cpu_dai->sample_bits =
883 snd_pcm_format_physical_width(params_format(params));
884
885 out:
886 mutex_unlock(&rtd->pcm_mutex);
887 return ret;
888
889 platform_err:
890 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
891 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
892
893 interface_err:
894 i = rtd->num_codecs;
895
896 codec_err:
897 while (--i >= 0) {
898 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
899 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
900 codec_dai->driver->ops->hw_free(substream, codec_dai);
901 codec_dai->rate = 0;
902 }
903
904 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
905 rtd->dai_link->ops->hw_free(substream);
906
907 mutex_unlock(&rtd->pcm_mutex);
908 return ret;
909 }
910
911 /*
912 * Frees resources allocated by hw_params, can be called multiple times
913 */
914 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
915 {
916 struct snd_soc_pcm_runtime *rtd = substream->private_data;
917 struct snd_soc_platform *platform = rtd->platform;
918 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
919 struct snd_soc_dai *codec_dai;
920 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
921 int i;
922
923 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
924
925 /* clear the corresponding DAIs parameters when going to be inactive */
926 if (cpu_dai->active == 1) {
927 cpu_dai->rate = 0;
928 cpu_dai->channels = 0;
929 cpu_dai->sample_bits = 0;
930 }
931
932 for (i = 0; i < rtd->num_codecs; i++) {
933 codec_dai = rtd->codec_dais[i];
934 if (codec_dai->active == 1) {
935 codec_dai->rate = 0;
936 codec_dai->channels = 0;
937 codec_dai->sample_bits = 0;
938 }
939 }
940
941 /* apply codec digital mute */
942 for (i = 0; i < rtd->num_codecs; i++) {
943 if ((playback && rtd->codec_dais[i]->playback_active == 1) ||
944 (!playback && rtd->codec_dais[i]->capture_active == 1))
945 snd_soc_dai_digital_mute(rtd->codec_dais[i], 1,
946 substream->stream);
947 }
948
949 /* free any machine hw params */
950 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
951 rtd->dai_link->ops->hw_free(substream);
952
953 /* free any DMA resources */
954 if (platform->driver->ops && platform->driver->ops->hw_free)
955 platform->driver->ops->hw_free(substream);
956
957 /* now free hw params for the DAIs */
958 for (i = 0; i < rtd->num_codecs; i++) {
959 codec_dai = rtd->codec_dais[i];
960 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
961 codec_dai->driver->ops->hw_free(substream, codec_dai);
962 }
963
964 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
965 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
966
967 mutex_unlock(&rtd->pcm_mutex);
968 return 0;
969 }
970
971 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
972 {
973 struct snd_soc_pcm_runtime *rtd = substream->private_data;
974 struct snd_soc_platform *platform = rtd->platform;
975 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
976 struct snd_soc_dai *codec_dai;
977 int i, ret;
978
979 for (i = 0; i < rtd->num_codecs; i++) {
980 codec_dai = rtd->codec_dais[i];
981 if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) {
982 ret = codec_dai->driver->ops->trigger(substream,
983 cmd, codec_dai);
984 if (ret < 0)
985 return ret;
986 }
987 }
988
989 if (platform->driver->ops && platform->driver->ops->trigger) {
990 ret = platform->driver->ops->trigger(substream, cmd);
991 if (ret < 0)
992 return ret;
993 }
994
995 if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) {
996 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
997 if (ret < 0)
998 return ret;
999 }
1000
1001 if (rtd->dai_link->ops && rtd->dai_link->ops->trigger) {
1002 ret = rtd->dai_link->ops->trigger(substream, cmd);
1003 if (ret < 0)
1004 return ret;
1005 }
1006
1007 return 0;
1008 }
1009
1010 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1011 int cmd)
1012 {
1013 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1014 struct snd_soc_platform *platform = rtd->platform;
1015 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1016 struct snd_soc_dai *codec_dai;
1017 int i, ret;
1018
1019 for (i = 0; i < rtd->num_codecs; i++) {
1020 codec_dai = rtd->codec_dais[i];
1021 if (codec_dai->driver->ops &&
1022 codec_dai->driver->ops->bespoke_trigger) {
1023 ret = codec_dai->driver->ops->bespoke_trigger(substream,
1024 cmd, codec_dai);
1025 if (ret < 0)
1026 return ret;
1027 }
1028 }
1029
1030 if (platform->driver->bespoke_trigger) {
1031 ret = platform->driver->bespoke_trigger(substream, cmd);
1032 if (ret < 0)
1033 return ret;
1034 }
1035
1036 if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) {
1037 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1038 if (ret < 0)
1039 return ret;
1040 }
1041 return 0;
1042 }
1043 /*
1044 * soc level wrapper for pointer callback
1045 * If cpu_dai, codec_dai, platform driver has the delay callback, than
1046 * the runtime->delay will be updated accordingly.
1047 */
1048 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1049 {
1050 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1051 struct snd_soc_platform *platform = rtd->platform;
1052 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1053 struct snd_soc_dai *codec_dai;
1054 struct snd_pcm_runtime *runtime = substream->runtime;
1055 snd_pcm_uframes_t offset = 0;
1056 snd_pcm_sframes_t delay = 0;
1057 snd_pcm_sframes_t codec_delay = 0;
1058 int i;
1059
1060 if (platform->driver->ops && platform->driver->ops->pointer)
1061 offset = platform->driver->ops->pointer(substream);
1062
1063 if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay)
1064 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1065
1066 for (i = 0; i < rtd->num_codecs; i++) {
1067 codec_dai = rtd->codec_dais[i];
1068 if (codec_dai->driver->ops && codec_dai->driver->ops->delay)
1069 codec_delay = max(codec_delay,
1070 codec_dai->driver->ops->delay(substream,
1071 codec_dai));
1072 }
1073 delay += codec_delay;
1074
1075 /*
1076 * None of the existing platform drivers implement delay(), so
1077 * for now the codec_dai of first multicodec entry is used
1078 */
1079 if (platform->driver->delay)
1080 delay += platform->driver->delay(substream, rtd->codec_dais[0]);
1081
1082 runtime->delay = delay;
1083
1084 return offset;
1085 }
1086
1087 /* connect a FE and BE */
1088 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1089 struct snd_soc_pcm_runtime *be, int stream)
1090 {
1091 struct snd_soc_dpcm *dpcm;
1092
1093 /* only add new dpcms */
1094 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1095 if (dpcm->be == be && dpcm->fe == fe)
1096 return 0;
1097 }
1098
1099 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1100 if (!dpcm)
1101 return -ENOMEM;
1102
1103 dpcm->be = be;
1104 dpcm->fe = fe;
1105 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1106 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1107 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1108 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1109
1110 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1111 stream ? "capture" : "playback", fe->dai_link->name,
1112 stream ? "<-" : "->", be->dai_link->name);
1113
1114 #ifdef CONFIG_DEBUG_FS
1115 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1116 fe->debugfs_dpcm_root, &dpcm->state);
1117 #endif
1118 return 1;
1119 }
1120
1121 /* reparent a BE onto another FE */
1122 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1123 struct snd_soc_pcm_runtime *be, int stream)
1124 {
1125 struct snd_soc_dpcm *dpcm;
1126 struct snd_pcm_substream *fe_substream, *be_substream;
1127
1128 /* reparent if BE is connected to other FEs */
1129 if (!be->dpcm[stream].users)
1130 return;
1131
1132 be_substream = snd_soc_dpcm_get_substream(be, stream);
1133
1134 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
1135 if (dpcm->fe == fe)
1136 continue;
1137
1138 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1139 stream ? "capture" : "playback",
1140 dpcm->fe->dai_link->name,
1141 stream ? "<-" : "->", dpcm->be->dai_link->name);
1142
1143 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1144 be_substream->runtime = fe_substream->runtime;
1145 break;
1146 }
1147 }
1148
1149 /* disconnect a BE and FE */
1150 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1151 {
1152 struct snd_soc_dpcm *dpcm, *d;
1153
1154 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
1155 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1156 stream ? "capture" : "playback",
1157 dpcm->be->dai_link->name);
1158
1159 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1160 continue;
1161
1162 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1163 stream ? "capture" : "playback", fe->dai_link->name,
1164 stream ? "<-" : "->", dpcm->be->dai_link->name);
1165
1166 /* BEs still alive need new FE */
1167 dpcm_be_reparent(fe, dpcm->be, stream);
1168
1169 #ifdef CONFIG_DEBUG_FS
1170 debugfs_remove(dpcm->debugfs_state);
1171 #endif
1172 list_del(&dpcm->list_be);
1173 list_del(&dpcm->list_fe);
1174 kfree(dpcm);
1175 }
1176 }
1177
1178 /* get BE for DAI widget and stream */
1179 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1180 struct snd_soc_dapm_widget *widget, int stream)
1181 {
1182 struct snd_soc_pcm_runtime *be;
1183 int i, j;
1184
1185 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1186 for (i = 0; i < card->num_links; i++) {
1187 be = &card->rtd[i];
1188
1189 if (!be->dai_link->no_pcm)
1190 continue;
1191
1192 if (be->cpu_dai->playback_widget == widget)
1193 return be;
1194
1195 for (j = 0; j < be->num_codecs; j++) {
1196 struct snd_soc_dai *dai = be->codec_dais[j];
1197 if (dai->playback_widget == widget)
1198 return be;
1199 }
1200 }
1201 } else {
1202
1203 for (i = 0; i < card->num_links; i++) {
1204 be = &card->rtd[i];
1205
1206 if (!be->dai_link->no_pcm)
1207 continue;
1208
1209 if (be->cpu_dai->capture_widget == widget)
1210 return be;
1211
1212 for (j = 0; j < be->num_codecs; j++) {
1213 struct snd_soc_dai *dai = be->codec_dais[j];
1214 if (dai->capture_widget == widget)
1215 return be;
1216 }
1217 }
1218 }
1219
1220 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1221 stream ? "capture" : "playback", widget->name);
1222 return NULL;
1223 }
1224
1225 static inline struct snd_soc_dapm_widget *
1226 dai_get_widget(struct snd_soc_dai *dai, int stream)
1227 {
1228 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1229 return dai->playback_widget;
1230 else
1231 return dai->capture_widget;
1232 }
1233
1234 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1235 struct snd_soc_dapm_widget *widget)
1236 {
1237 int i;
1238
1239 for (i = 0; i < list->num_widgets; i++) {
1240 if (widget == list->widgets[i])
1241 return 1;
1242 }
1243
1244 return 0;
1245 }
1246
1247 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1248 int stream, struct snd_soc_dapm_widget_list **list_)
1249 {
1250 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1251 struct snd_soc_dapm_widget_list *list;
1252 int paths;
1253
1254 list = kzalloc(sizeof(struct snd_soc_dapm_widget_list) +
1255 sizeof(struct snd_soc_dapm_widget *), GFP_KERNEL);
1256 if (list == NULL)
1257 return -ENOMEM;
1258
1259 /* get number of valid DAI paths and their widgets */
1260 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, &list);
1261
1262 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1263 stream ? "capture" : "playback");
1264
1265 *list_ = list;
1266 return paths;
1267 }
1268
1269 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1270 struct snd_soc_dapm_widget_list **list_)
1271 {
1272 struct snd_soc_dpcm *dpcm;
1273 struct snd_soc_dapm_widget_list *list = *list_;
1274 struct snd_soc_dapm_widget *widget;
1275 int prune = 0;
1276
1277 /* Destroy any old FE <--> BE connections */
1278 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1279 unsigned int i;
1280
1281 /* is there a valid CPU DAI widget for this BE */
1282 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1283
1284 /* prune the BE if it's no longer in our active list */
1285 if (widget && widget_in_list(list, widget))
1286 continue;
1287
1288 /* is there a valid CODEC DAI widget for this BE */
1289 for (i = 0; i < dpcm->be->num_codecs; i++) {
1290 struct snd_soc_dai *dai = dpcm->be->codec_dais[i];
1291 widget = dai_get_widget(dai, stream);
1292
1293 /* prune the BE if it's no longer in our active list */
1294 if (widget && widget_in_list(list, widget))
1295 continue;
1296 }
1297
1298 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1299 stream ? "capture" : "playback",
1300 dpcm->be->dai_link->name, fe->dai_link->name);
1301 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1302 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1303 prune++;
1304 }
1305
1306 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1307 return prune;
1308 }
1309
1310 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1311 struct snd_soc_dapm_widget_list **list_)
1312 {
1313 struct snd_soc_card *card = fe->card;
1314 struct snd_soc_dapm_widget_list *list = *list_;
1315 struct snd_soc_pcm_runtime *be;
1316 int i, new = 0, err;
1317
1318 /* Create any new FE <--> BE connections */
1319 for (i = 0; i < list->num_widgets; i++) {
1320
1321 switch (list->widgets[i]->id) {
1322 case snd_soc_dapm_dai_in:
1323 case snd_soc_dapm_dai_out:
1324 break;
1325 default:
1326 continue;
1327 }
1328
1329 /* is there a valid BE rtd for this widget */
1330 be = dpcm_get_be(card, list->widgets[i], stream);
1331 if (!be) {
1332 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1333 list->widgets[i]->name);
1334 continue;
1335 }
1336
1337 /* make sure BE is a real BE */
1338 if (!be->dai_link->no_pcm)
1339 continue;
1340
1341 /* don't connect if FE is not running */
1342 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1343 continue;
1344
1345 /* newly connected FE and BE */
1346 err = dpcm_be_connect(fe, be, stream);
1347 if (err < 0) {
1348 dev_err(fe->dev, "ASoC: can't connect %s\n",
1349 list->widgets[i]->name);
1350 break;
1351 } else if (err == 0) /* already connected */
1352 continue;
1353
1354 /* new */
1355 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1356 new++;
1357 }
1358
1359 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1360 return new;
1361 }
1362
1363 /*
1364 * Find the corresponding BE DAIs that source or sink audio to this
1365 * FE substream.
1366 */
1367 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1368 int stream, struct snd_soc_dapm_widget_list **list, int new)
1369 {
1370 if (new)
1371 return dpcm_add_paths(fe, stream, list);
1372 else
1373 return dpcm_prune_paths(fe, stream, list);
1374 }
1375
1376 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1377 {
1378 struct snd_soc_dpcm *dpcm;
1379
1380 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1381 dpcm->be->dpcm[stream].runtime_update =
1382 SND_SOC_DPCM_UPDATE_NO;
1383 }
1384
1385 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1386 int stream)
1387 {
1388 struct snd_soc_dpcm *dpcm;
1389
1390 /* disable any enabled and non active backends */
1391 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1392
1393 struct snd_soc_pcm_runtime *be = dpcm->be;
1394 struct snd_pcm_substream *be_substream =
1395 snd_soc_dpcm_get_substream(be, stream);
1396
1397 if (be->dpcm[stream].users == 0)
1398 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1399 stream ? "capture" : "playback",
1400 be->dpcm[stream].state);
1401
1402 if (--be->dpcm[stream].users != 0)
1403 continue;
1404
1405 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1406 continue;
1407
1408 soc_pcm_close(be_substream);
1409 be_substream->runtime = NULL;
1410 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1411 }
1412 }
1413
1414 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1415 {
1416 struct snd_soc_dpcm *dpcm;
1417 int err, count = 0;
1418
1419 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1420 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1421
1422 struct snd_soc_pcm_runtime *be = dpcm->be;
1423 struct snd_pcm_substream *be_substream =
1424 snd_soc_dpcm_get_substream(be, stream);
1425
1426 if (!be_substream) {
1427 dev_err(be->dev, "ASoC: no backend %s stream\n",
1428 stream ? "capture" : "playback");
1429 continue;
1430 }
1431
1432 /* is this op for this BE ? */
1433 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1434 continue;
1435
1436 /* first time the dpcm is open ? */
1437 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1438 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1439 stream ? "capture" : "playback",
1440 be->dpcm[stream].state);
1441
1442 if (be->dpcm[stream].users++ != 0)
1443 continue;
1444
1445 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1446 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1447 continue;
1448
1449 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1450 stream ? "capture" : "playback", be->dai_link->name);
1451
1452 be_substream->runtime = be->dpcm[stream].runtime;
1453 err = soc_pcm_open(be_substream);
1454 if (err < 0) {
1455 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1456 be->dpcm[stream].users--;
1457 if (be->dpcm[stream].users < 0)
1458 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1459 stream ? "capture" : "playback",
1460 be->dpcm[stream].state);
1461
1462 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1463 goto unwind;
1464 }
1465
1466 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1467 count++;
1468 }
1469
1470 return count;
1471
1472 unwind:
1473 /* disable any enabled and non active backends */
1474 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1475 struct snd_soc_pcm_runtime *be = dpcm->be;
1476 struct snd_pcm_substream *be_substream =
1477 snd_soc_dpcm_get_substream(be, stream);
1478
1479 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1480 continue;
1481
1482 if (be->dpcm[stream].users == 0)
1483 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1484 stream ? "capture" : "playback",
1485 be->dpcm[stream].state);
1486
1487 if (--be->dpcm[stream].users != 0)
1488 continue;
1489
1490 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1491 continue;
1492
1493 soc_pcm_close(be_substream);
1494 be_substream->runtime = NULL;
1495 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1496 }
1497
1498 return err;
1499 }
1500
1501 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1502 struct snd_soc_pcm_stream *stream)
1503 {
1504 runtime->hw.rate_min = stream->rate_min;
1505 runtime->hw.rate_max = stream->rate_max;
1506 runtime->hw.channels_min = stream->channels_min;
1507 runtime->hw.channels_max = stream->channels_max;
1508 if (runtime->hw.formats)
1509 runtime->hw.formats &= stream->formats;
1510 else
1511 runtime->hw.formats = stream->formats;
1512 runtime->hw.rates = stream->rates;
1513 }
1514
1515 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1516 {
1517 struct snd_pcm_runtime *runtime = substream->runtime;
1518 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1519 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1520 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1521
1522 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1523 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1524 else
1525 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1526 }
1527
1528 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1529
1530 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1531 * for avoiding the race with trigger callback.
1532 * If the state is unset and a trigger is pending while the previous operation,
1533 * process the pending trigger action here.
1534 */
1535 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1536 int stream, enum snd_soc_dpcm_update state)
1537 {
1538 struct snd_pcm_substream *substream =
1539 snd_soc_dpcm_get_substream(fe, stream);
1540
1541 snd_pcm_stream_lock_irq(substream);
1542 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1543 dpcm_fe_dai_do_trigger(substream,
1544 fe->dpcm[stream].trigger_pending - 1);
1545 fe->dpcm[stream].trigger_pending = 0;
1546 }
1547 fe->dpcm[stream].runtime_update = state;
1548 snd_pcm_stream_unlock_irq(substream);
1549 }
1550
1551 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1552 {
1553 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1554 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1555 int stream = fe_substream->stream, ret = 0;
1556
1557 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1558
1559 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1560 if (ret < 0) {
1561 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1562 goto be_err;
1563 }
1564
1565 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1566
1567 /* start the DAI frontend */
1568 ret = soc_pcm_open(fe_substream);
1569 if (ret < 0) {
1570 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1571 goto unwind;
1572 }
1573
1574 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1575
1576 dpcm_set_fe_runtime(fe_substream);
1577 snd_pcm_limit_hw_rates(runtime);
1578
1579 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1580 return 0;
1581
1582 unwind:
1583 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1584 be_err:
1585 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1586 return ret;
1587 }
1588
1589 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1590 {
1591 struct snd_soc_dpcm *dpcm;
1592
1593 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1594 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1595
1596 struct snd_soc_pcm_runtime *be = dpcm->be;
1597 struct snd_pcm_substream *be_substream =
1598 snd_soc_dpcm_get_substream(be, stream);
1599
1600 /* is this op for this BE ? */
1601 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1602 continue;
1603
1604 if (be->dpcm[stream].users == 0)
1605 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1606 stream ? "capture" : "playback",
1607 be->dpcm[stream].state);
1608
1609 if (--be->dpcm[stream].users != 0)
1610 continue;
1611
1612 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1613 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1614 continue;
1615
1616 dev_dbg(be->dev, "ASoC: close BE %s\n",
1617 dpcm->fe->dai_link->name);
1618
1619 soc_pcm_close(be_substream);
1620 be_substream->runtime = NULL;
1621
1622 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1623 }
1624 return 0;
1625 }
1626
1627 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1628 {
1629 struct snd_soc_pcm_runtime *fe = substream->private_data;
1630 int stream = substream->stream;
1631
1632 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1633
1634 /* shutdown the BEs */
1635 dpcm_be_dai_shutdown(fe, substream->stream);
1636
1637 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1638
1639 /* now shutdown the frontend */
1640 soc_pcm_close(substream);
1641
1642 /* run the stream event for each BE */
1643 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1644
1645 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1646 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1647 return 0;
1648 }
1649
1650 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1651 {
1652 struct snd_soc_dpcm *dpcm;
1653
1654 /* only hw_params backends that are either sinks or sources
1655 * to this frontend DAI */
1656 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1657
1658 struct snd_soc_pcm_runtime *be = dpcm->be;
1659 struct snd_pcm_substream *be_substream =
1660 snd_soc_dpcm_get_substream(be, stream);
1661
1662 /* is this op for this BE ? */
1663 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1664 continue;
1665
1666 /* only free hw when no longer used - check all FEs */
1667 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1668 continue;
1669
1670 /* do not free hw if this BE is used by other FE */
1671 if (be->dpcm[stream].users > 1)
1672 continue;
1673
1674 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1675 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1676 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1677 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1678 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1679 continue;
1680
1681 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1682 dpcm->fe->dai_link->name);
1683
1684 soc_pcm_hw_free(be_substream);
1685
1686 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1687 }
1688
1689 return 0;
1690 }
1691
1692 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1693 {
1694 struct snd_soc_pcm_runtime *fe = substream->private_data;
1695 int err, stream = substream->stream;
1696
1697 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1698 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1699
1700 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1701
1702 /* call hw_free on the frontend */
1703 err = soc_pcm_hw_free(substream);
1704 if (err < 0)
1705 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
1706 fe->dai_link->name);
1707
1708 /* only hw_params backends that are either sinks or sources
1709 * to this frontend DAI */
1710 err = dpcm_be_dai_hw_free(fe, stream);
1711
1712 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1713 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1714
1715 mutex_unlock(&fe->card->mutex);
1716 return 0;
1717 }
1718
1719 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1720 {
1721 struct snd_soc_dpcm *dpcm;
1722 int ret;
1723
1724 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1725
1726 struct snd_soc_pcm_runtime *be = dpcm->be;
1727 struct snd_pcm_substream *be_substream =
1728 snd_soc_dpcm_get_substream(be, stream);
1729
1730 /* is this op for this BE ? */
1731 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1732 continue;
1733
1734 /* only allow hw_params() if no connected FEs are running */
1735 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1736 continue;
1737
1738 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1739 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1740 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1741 continue;
1742
1743 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1744 dpcm->fe->dai_link->name);
1745
1746 /* copy params for each dpcm */
1747 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1748 sizeof(struct snd_pcm_hw_params));
1749
1750 /* perform any hw_params fixups */
1751 if (be->dai_link->be_hw_params_fixup) {
1752 ret = be->dai_link->be_hw_params_fixup(be,
1753 &dpcm->hw_params);
1754 if (ret < 0) {
1755 dev_err(be->dev,
1756 "ASoC: hw_params BE fixup failed %d\n",
1757 ret);
1758 goto unwind;
1759 }
1760 }
1761
1762 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1763 if (ret < 0) {
1764 dev_err(dpcm->be->dev,
1765 "ASoC: hw_params BE failed %d\n", ret);
1766 goto unwind;
1767 }
1768
1769 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1770 }
1771 return 0;
1772
1773 unwind:
1774 /* disable any enabled and non active backends */
1775 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1776 struct snd_soc_pcm_runtime *be = dpcm->be;
1777 struct snd_pcm_substream *be_substream =
1778 snd_soc_dpcm_get_substream(be, stream);
1779
1780 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1781 continue;
1782
1783 /* only allow hw_free() if no connected FEs are running */
1784 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1785 continue;
1786
1787 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1788 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1789 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1790 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1791 continue;
1792
1793 soc_pcm_hw_free(be_substream);
1794 }
1795
1796 return ret;
1797 }
1798
1799 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1800 struct snd_pcm_hw_params *params)
1801 {
1802 struct snd_soc_pcm_runtime *fe = substream->private_data;
1803 int ret, stream = substream->stream;
1804
1805 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1806 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1807
1808 memcpy(&fe->dpcm[substream->stream].hw_params, params,
1809 sizeof(struct snd_pcm_hw_params));
1810 ret = dpcm_be_dai_hw_params(fe, substream->stream);
1811 if (ret < 0) {
1812 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
1813 goto out;
1814 }
1815
1816 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1817 fe->dai_link->name, params_rate(params),
1818 params_channels(params), params_format(params));
1819
1820 /* call hw_params on the frontend */
1821 ret = soc_pcm_hw_params(substream, params);
1822 if (ret < 0) {
1823 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
1824 dpcm_be_dai_hw_free(fe, stream);
1825 } else
1826 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1827
1828 out:
1829 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1830 mutex_unlock(&fe->card->mutex);
1831 return ret;
1832 }
1833
1834 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
1835 struct snd_pcm_substream *substream, int cmd)
1836 {
1837 int ret;
1838
1839 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
1840 dpcm->fe->dai_link->name, cmd);
1841
1842 ret = soc_pcm_trigger(substream, cmd);
1843 if (ret < 0)
1844 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
1845
1846 return ret;
1847 }
1848
1849 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
1850 int cmd)
1851 {
1852 struct snd_soc_dpcm *dpcm;
1853 int ret = 0;
1854
1855 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1856
1857 struct snd_soc_pcm_runtime *be = dpcm->be;
1858 struct snd_pcm_substream *be_substream =
1859 snd_soc_dpcm_get_substream(be, stream);
1860
1861 /* is this op for this BE ? */
1862 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1863 continue;
1864
1865 switch (cmd) {
1866 case SNDRV_PCM_TRIGGER_START:
1867 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1868 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1869 continue;
1870
1871 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1872 if (ret)
1873 return ret;
1874
1875 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1876 break;
1877 case SNDRV_PCM_TRIGGER_RESUME:
1878 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1879 continue;
1880
1881 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1882 if (ret)
1883 return ret;
1884
1885 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1886 break;
1887 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1888 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
1889 continue;
1890
1891 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1892 if (ret)
1893 return ret;
1894
1895 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1896 break;
1897 case SNDRV_PCM_TRIGGER_STOP:
1898 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1899 continue;
1900
1901 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1902 continue;
1903
1904 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1905 if (ret)
1906 return ret;
1907
1908 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1909 break;
1910 case SNDRV_PCM_TRIGGER_SUSPEND:
1911 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1912 continue;
1913
1914 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1915 continue;
1916
1917 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1918 if (ret)
1919 return ret;
1920
1921 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
1922 break;
1923 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1924 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1925 continue;
1926
1927 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1928 continue;
1929
1930 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1931 if (ret)
1932 return ret;
1933
1934 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
1935 break;
1936 }
1937 }
1938
1939 return ret;
1940 }
1941 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
1942
1943 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
1944 {
1945 struct snd_soc_pcm_runtime *fe = substream->private_data;
1946 int stream = substream->stream, ret;
1947 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1948
1949 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1950
1951 switch (trigger) {
1952 case SND_SOC_DPCM_TRIGGER_PRE:
1953 /* call trigger on the frontend before the backend. */
1954
1955 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
1956 fe->dai_link->name, cmd);
1957
1958 ret = soc_pcm_trigger(substream, cmd);
1959 if (ret < 0) {
1960 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1961 goto out;
1962 }
1963
1964 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1965 break;
1966 case SND_SOC_DPCM_TRIGGER_POST:
1967 /* call trigger on the frontend after the backend. */
1968
1969 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1970 if (ret < 0) {
1971 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1972 goto out;
1973 }
1974
1975 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
1976 fe->dai_link->name, cmd);
1977
1978 ret = soc_pcm_trigger(substream, cmd);
1979 break;
1980 case SND_SOC_DPCM_TRIGGER_BESPOKE:
1981 /* bespoke trigger() - handles both FE and BEs */
1982
1983 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
1984 fe->dai_link->name, cmd);
1985
1986 ret = soc_pcm_bespoke_trigger(substream, cmd);
1987 if (ret < 0) {
1988 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1989 goto out;
1990 }
1991 break;
1992 default:
1993 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
1994 fe->dai_link->name);
1995 ret = -EINVAL;
1996 goto out;
1997 }
1998
1999 switch (cmd) {
2000 case SNDRV_PCM_TRIGGER_START:
2001 case SNDRV_PCM_TRIGGER_RESUME:
2002 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2003 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2004 break;
2005 case SNDRV_PCM_TRIGGER_STOP:
2006 case SNDRV_PCM_TRIGGER_SUSPEND:
2007 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2008 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2009 break;
2010 }
2011
2012 out:
2013 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2014 return ret;
2015 }
2016
2017 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2018 {
2019 struct snd_soc_pcm_runtime *fe = substream->private_data;
2020 int stream = substream->stream;
2021
2022 /* if FE's runtime_update is already set, we're in race;
2023 * process this trigger later at exit
2024 */
2025 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2026 fe->dpcm[stream].trigger_pending = cmd + 1;
2027 return 0; /* delayed, assuming it's successful */
2028 }
2029
2030 /* we're alone, let's trigger */
2031 return dpcm_fe_dai_do_trigger(substream, cmd);
2032 }
2033
2034 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2035 {
2036 struct snd_soc_dpcm *dpcm;
2037 int ret = 0;
2038
2039 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2040
2041 struct snd_soc_pcm_runtime *be = dpcm->be;
2042 struct snd_pcm_substream *be_substream =
2043 snd_soc_dpcm_get_substream(be, stream);
2044
2045 /* is this op for this BE ? */
2046 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2047 continue;
2048
2049 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2050 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2051 continue;
2052
2053 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2054 dpcm->fe->dai_link->name);
2055
2056 ret = soc_pcm_prepare(be_substream);
2057 if (ret < 0) {
2058 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2059 ret);
2060 break;
2061 }
2062
2063 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2064 }
2065 return ret;
2066 }
2067
2068 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2069 {
2070 struct snd_soc_pcm_runtime *fe = substream->private_data;
2071 int stream = substream->stream, ret = 0;
2072
2073 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2074
2075 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2076
2077 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2078
2079 /* there is no point preparing this FE if there are no BEs */
2080 if (list_empty(&fe->dpcm[stream].be_clients)) {
2081 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2082 fe->dai_link->name);
2083 ret = -EINVAL;
2084 goto out;
2085 }
2086
2087 ret = dpcm_be_dai_prepare(fe, substream->stream);
2088 if (ret < 0)
2089 goto out;
2090
2091 /* call prepare on the frontend */
2092 ret = soc_pcm_prepare(substream);
2093 if (ret < 0) {
2094 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2095 fe->dai_link->name);
2096 goto out;
2097 }
2098
2099 /* run the stream event for each BE */
2100 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2101 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2102
2103 out:
2104 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2105 mutex_unlock(&fe->card->mutex);
2106
2107 return ret;
2108 }
2109
2110 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2111 unsigned int cmd, void *arg)
2112 {
2113 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2114 struct snd_soc_platform *platform = rtd->platform;
2115
2116 if (platform->driver->ops && platform->driver->ops->ioctl)
2117 return platform->driver->ops->ioctl(substream, cmd, arg);
2118 return snd_pcm_lib_ioctl(substream, cmd, arg);
2119 }
2120
2121 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2122 {
2123 struct snd_pcm_substream *substream =
2124 snd_soc_dpcm_get_substream(fe, stream);
2125 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2126 int err;
2127
2128 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2129 stream ? "capture" : "playback", fe->dai_link->name);
2130
2131 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2132 /* call bespoke trigger - FE takes care of all BE triggers */
2133 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2134 fe->dai_link->name);
2135
2136 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2137 if (err < 0)
2138 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2139 } else {
2140 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2141 fe->dai_link->name);
2142
2143 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2144 if (err < 0)
2145 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2146 }
2147
2148 err = dpcm_be_dai_hw_free(fe, stream);
2149 if (err < 0)
2150 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2151
2152 err = dpcm_be_dai_shutdown(fe, stream);
2153 if (err < 0)
2154 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2155
2156 /* run the stream event for each BE */
2157 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2158
2159 return 0;
2160 }
2161
2162 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2163 {
2164 struct snd_pcm_substream *substream =
2165 snd_soc_dpcm_get_substream(fe, stream);
2166 struct snd_soc_dpcm *dpcm;
2167 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2168 int ret;
2169
2170 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2171 stream ? "capture" : "playback", fe->dai_link->name);
2172
2173 /* Only start the BE if the FE is ready */
2174 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2175 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2176 return -EINVAL;
2177
2178 /* startup must always be called for new BEs */
2179 ret = dpcm_be_dai_startup(fe, stream);
2180 if (ret < 0)
2181 goto disconnect;
2182
2183 /* keep going if FE state is > open */
2184 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2185 return 0;
2186
2187 ret = dpcm_be_dai_hw_params(fe, stream);
2188 if (ret < 0)
2189 goto close;
2190
2191 /* keep going if FE state is > hw_params */
2192 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2193 return 0;
2194
2195
2196 ret = dpcm_be_dai_prepare(fe, stream);
2197 if (ret < 0)
2198 goto hw_free;
2199
2200 /* run the stream event for each BE */
2201 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2202
2203 /* keep going if FE state is > prepare */
2204 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2205 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2206 return 0;
2207
2208 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2209 /* call trigger on the frontend - FE takes care of all BE triggers */
2210 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2211 fe->dai_link->name);
2212
2213 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2214 if (ret < 0) {
2215 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2216 goto hw_free;
2217 }
2218 } else {
2219 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2220 fe->dai_link->name);
2221
2222 ret = dpcm_be_dai_trigger(fe, stream,
2223 SNDRV_PCM_TRIGGER_START);
2224 if (ret < 0) {
2225 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2226 goto hw_free;
2227 }
2228 }
2229
2230 return 0;
2231
2232 hw_free:
2233 dpcm_be_dai_hw_free(fe, stream);
2234 close:
2235 dpcm_be_dai_shutdown(fe, stream);
2236 disconnect:
2237 /* disconnect any non started BEs */
2238 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2239 struct snd_soc_pcm_runtime *be = dpcm->be;
2240 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2241 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2242 }
2243
2244 return ret;
2245 }
2246
2247 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2248 {
2249 int ret;
2250
2251 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2252 ret = dpcm_run_update_startup(fe, stream);
2253 if (ret < 0)
2254 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2255 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2256
2257 return ret;
2258 }
2259
2260 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2261 {
2262 int ret;
2263
2264 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2265 ret = dpcm_run_update_shutdown(fe, stream);
2266 if (ret < 0)
2267 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2268 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2269
2270 return ret;
2271 }
2272
2273 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2274 * any DAI links.
2275 */
2276 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2277 {
2278 int i, old, new, paths;
2279
2280 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2281 for (i = 0; i < card->num_rtd; i++) {
2282 struct snd_soc_dapm_widget_list *list;
2283 struct snd_soc_pcm_runtime *fe = &card->rtd[i];
2284
2285 /* make sure link is FE */
2286 if (!fe->dai_link->dynamic)
2287 continue;
2288
2289 /* only check active links */
2290 if (!fe->cpu_dai->active)
2291 continue;
2292
2293 /* DAPM sync will call this to update DSP paths */
2294 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
2295 fe->dai_link->name);
2296
2297 /* skip if FE doesn't have playback capability */
2298 if (!fe->cpu_dai->driver->playback.channels_min
2299 || !fe->codec_dai->driver->playback.channels_min)
2300 goto capture;
2301
2302 /* skip if FE isn't currently playing */
2303 if (!fe->cpu_dai->playback_active
2304 || !fe->codec_dai->playback_active)
2305 goto capture;
2306
2307 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2308 if (paths < 0) {
2309 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2310 fe->dai_link->name, "playback");
2311 mutex_unlock(&card->mutex);
2312 return paths;
2313 }
2314
2315 /* update any new playback paths */
2316 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
2317 if (new) {
2318 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2319 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2320 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2321 }
2322
2323 /* update any old playback paths */
2324 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
2325 if (old) {
2326 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2327 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2328 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2329 }
2330
2331 dpcm_path_put(&list);
2332 capture:
2333 /* skip if FE doesn't have capture capability */
2334 if (!fe->cpu_dai->driver->capture.channels_min
2335 || !fe->codec_dai->driver->capture.channels_min)
2336 continue;
2337
2338 /* skip if FE isn't currently capturing */
2339 if (!fe->cpu_dai->capture_active
2340 || !fe->codec_dai->capture_active)
2341 continue;
2342
2343 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2344 if (paths < 0) {
2345 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2346 fe->dai_link->name, "capture");
2347 mutex_unlock(&card->mutex);
2348 return paths;
2349 }
2350
2351 /* update any new capture paths */
2352 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
2353 if (new) {
2354 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2355 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2356 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2357 }
2358
2359 /* update any old capture paths */
2360 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
2361 if (old) {
2362 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2363 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2364 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2365 }
2366
2367 dpcm_path_put(&list);
2368 }
2369
2370 mutex_unlock(&card->mutex);
2371 return 0;
2372 }
2373 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2374 {
2375 struct snd_soc_dpcm *dpcm;
2376 struct list_head *clients =
2377 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
2378
2379 list_for_each_entry(dpcm, clients, list_be) {
2380
2381 struct snd_soc_pcm_runtime *be = dpcm->be;
2382 int i;
2383
2384 if (be->dai_link->ignore_suspend)
2385 continue;
2386
2387 for (i = 0; i < be->num_codecs; i++) {
2388 struct snd_soc_dai *dai = be->codec_dais[i];
2389 struct snd_soc_dai_driver *drv = dai->driver;
2390
2391 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2392 be->dai_link->name);
2393
2394 if (drv->ops && drv->ops->digital_mute &&
2395 dai->playback_active)
2396 drv->ops->digital_mute(dai, mute);
2397 }
2398 }
2399
2400 return 0;
2401 }
2402
2403 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2404 {
2405 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2406 struct snd_soc_dpcm *dpcm;
2407 struct snd_soc_dapm_widget_list *list;
2408 int ret;
2409 int stream = fe_substream->stream;
2410
2411 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2412 fe->dpcm[stream].runtime = fe_substream->runtime;
2413
2414 ret = dpcm_path_get(fe, stream, &list);
2415 if (ret < 0) {
2416 mutex_unlock(&fe->card->mutex);
2417 return ret;
2418 } else if (ret == 0) {
2419 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2420 fe->dai_link->name, stream ? "capture" : "playback");
2421 }
2422
2423 /* calculate valid and active FE <-> BE dpcms */
2424 dpcm_process_paths(fe, stream, &list, 1);
2425
2426 ret = dpcm_fe_dai_startup(fe_substream);
2427 if (ret < 0) {
2428 /* clean up all links */
2429 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2430 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2431
2432 dpcm_be_disconnect(fe, stream);
2433 fe->dpcm[stream].runtime = NULL;
2434 }
2435
2436 dpcm_clear_pending_state(fe, stream);
2437 dpcm_path_put(&list);
2438 mutex_unlock(&fe->card->mutex);
2439 return ret;
2440 }
2441
2442 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2443 {
2444 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2445 struct snd_soc_dpcm *dpcm;
2446 int stream = fe_substream->stream, ret;
2447
2448 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2449 ret = dpcm_fe_dai_shutdown(fe_substream);
2450
2451 /* mark FE's links ready to prune */
2452 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2453 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2454
2455 dpcm_be_disconnect(fe, stream);
2456
2457 fe->dpcm[stream].runtime = NULL;
2458 mutex_unlock(&fe->card->mutex);
2459 return ret;
2460 }
2461
2462 /* create a new pcm */
2463 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2464 {
2465 struct snd_soc_platform *platform = rtd->platform;
2466 struct snd_soc_dai *codec_dai;
2467 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2468 struct snd_pcm *pcm;
2469 char new_name[64];
2470 int ret = 0, playback = 0, capture = 0;
2471 int i;
2472
2473 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2474 playback = rtd->dai_link->dpcm_playback;
2475 capture = rtd->dai_link->dpcm_capture;
2476 } else {
2477 for (i = 0; i < rtd->num_codecs; i++) {
2478 codec_dai = rtd->codec_dais[i];
2479 if (codec_dai->driver->playback.channels_min)
2480 playback = 1;
2481 if (codec_dai->driver->capture.channels_min)
2482 capture = 1;
2483 }
2484
2485 capture = capture && cpu_dai->driver->capture.channels_min;
2486 playback = playback && cpu_dai->driver->playback.channels_min;
2487 }
2488
2489 if (rtd->dai_link->playback_only) {
2490 playback = 1;
2491 capture = 0;
2492 }
2493
2494 if (rtd->dai_link->capture_only) {
2495 playback = 0;
2496 capture = 1;
2497 }
2498
2499 /* create the PCM */
2500 if (rtd->dai_link->no_pcm) {
2501 snprintf(new_name, sizeof(new_name), "(%s)",
2502 rtd->dai_link->stream_name);
2503
2504 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2505 playback, capture, &pcm);
2506 } else {
2507 if (rtd->dai_link->dynamic)
2508 snprintf(new_name, sizeof(new_name), "%s (*)",
2509 rtd->dai_link->stream_name);
2510 else
2511 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2512 rtd->dai_link->stream_name,
2513 (rtd->num_codecs > 1) ?
2514 "multicodec" : rtd->codec_dai->name, num);
2515
2516 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2517 capture, &pcm);
2518 }
2519 if (ret < 0) {
2520 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2521 rtd->dai_link->name);
2522 return ret;
2523 }
2524 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2525
2526 /* DAPM dai link stream work */
2527 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2528
2529 rtd->pcm = pcm;
2530 pcm->private_data = rtd;
2531
2532 if (rtd->dai_link->no_pcm) {
2533 if (playback)
2534 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2535 if (capture)
2536 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2537 goto out;
2538 }
2539
2540 /* ASoC PCM operations */
2541 if (rtd->dai_link->dynamic) {
2542 rtd->ops.open = dpcm_fe_dai_open;
2543 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2544 rtd->ops.prepare = dpcm_fe_dai_prepare;
2545 rtd->ops.trigger = dpcm_fe_dai_trigger;
2546 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2547 rtd->ops.close = dpcm_fe_dai_close;
2548 rtd->ops.pointer = soc_pcm_pointer;
2549 rtd->ops.ioctl = soc_pcm_ioctl;
2550 } else {
2551 rtd->ops.open = soc_pcm_open;
2552 rtd->ops.hw_params = soc_pcm_hw_params;
2553 rtd->ops.prepare = soc_pcm_prepare;
2554 rtd->ops.trigger = soc_pcm_trigger;
2555 rtd->ops.hw_free = soc_pcm_hw_free;
2556 rtd->ops.close = soc_pcm_close;
2557 rtd->ops.pointer = soc_pcm_pointer;
2558 rtd->ops.ioctl = soc_pcm_ioctl;
2559 }
2560
2561 if (platform->driver->ops) {
2562 rtd->ops.ack = platform->driver->ops->ack;
2563 rtd->ops.copy = platform->driver->ops->copy;
2564 rtd->ops.silence = platform->driver->ops->silence;
2565 rtd->ops.page = platform->driver->ops->page;
2566 rtd->ops.mmap = platform->driver->ops->mmap;
2567 }
2568
2569 if (playback)
2570 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2571
2572 if (capture)
2573 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2574
2575 if (platform->driver->pcm_new) {
2576 ret = platform->driver->pcm_new(rtd);
2577 if (ret < 0) {
2578 dev_err(platform->dev,
2579 "ASoC: pcm constructor failed: %d\n",
2580 ret);
2581 return ret;
2582 }
2583 }
2584
2585 pcm->private_free = platform->driver->pcm_free;
2586 out:
2587 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
2588 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
2589 cpu_dai->name);
2590 return ret;
2591 }
2592
2593 /* is the current PCM operation for this FE ? */
2594 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2595 {
2596 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2597 return 1;
2598 return 0;
2599 }
2600 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2601
2602 /* is the current PCM operation for this BE ? */
2603 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2604 struct snd_soc_pcm_runtime *be, int stream)
2605 {
2606 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2607 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2608 be->dpcm[stream].runtime_update))
2609 return 1;
2610 return 0;
2611 }
2612 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2613
2614 /* get the substream for this BE */
2615 struct snd_pcm_substream *
2616 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2617 {
2618 return be->pcm->streams[stream].substream;
2619 }
2620 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2621
2622 /* get the BE runtime state */
2623 enum snd_soc_dpcm_state
2624 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2625 {
2626 return be->dpcm[stream].state;
2627 }
2628 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
2629
2630 /* set the BE runtime state */
2631 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
2632 int stream, enum snd_soc_dpcm_state state)
2633 {
2634 be->dpcm[stream].state = state;
2635 }
2636 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
2637
2638 /*
2639 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2640 * are not running, paused or suspended for the specified stream direction.
2641 */
2642 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2643 struct snd_soc_pcm_runtime *be, int stream)
2644 {
2645 struct snd_soc_dpcm *dpcm;
2646 int state;
2647
2648 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2649
2650 if (dpcm->fe == fe)
2651 continue;
2652
2653 state = dpcm->fe->dpcm[stream].state;
2654 if (state == SND_SOC_DPCM_STATE_START ||
2655 state == SND_SOC_DPCM_STATE_PAUSED ||
2656 state == SND_SOC_DPCM_STATE_SUSPEND)
2657 return 0;
2658 }
2659
2660 /* it's safe to free/stop this BE DAI */
2661 return 1;
2662 }
2663 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2664
2665 /*
2666 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2667 * running, paused or suspended for the specified stream direction.
2668 */
2669 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2670 struct snd_soc_pcm_runtime *be, int stream)
2671 {
2672 struct snd_soc_dpcm *dpcm;
2673 int state;
2674
2675 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2676
2677 if (dpcm->fe == fe)
2678 continue;
2679
2680 state = dpcm->fe->dpcm[stream].state;
2681 if (state == SND_SOC_DPCM_STATE_START ||
2682 state == SND_SOC_DPCM_STATE_PAUSED ||
2683 state == SND_SOC_DPCM_STATE_SUSPEND ||
2684 state == SND_SOC_DPCM_STATE_PREPARE)
2685 return 0;
2686 }
2687
2688 /* it's safe to change hw_params */
2689 return 1;
2690 }
2691 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2692
2693 int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
2694 int cmd, struct snd_soc_platform *platform)
2695 {
2696 if (platform->driver->ops && platform->driver->ops->trigger)
2697 return platform->driver->ops->trigger(substream, cmd);
2698 return 0;
2699 }
2700 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger);
2701
2702 #ifdef CONFIG_DEBUG_FS
2703 static char *dpcm_state_string(enum snd_soc_dpcm_state state)
2704 {
2705 switch (state) {
2706 case SND_SOC_DPCM_STATE_NEW:
2707 return "new";
2708 case SND_SOC_DPCM_STATE_OPEN:
2709 return "open";
2710 case SND_SOC_DPCM_STATE_HW_PARAMS:
2711 return "hw_params";
2712 case SND_SOC_DPCM_STATE_PREPARE:
2713 return "prepare";
2714 case SND_SOC_DPCM_STATE_START:
2715 return "start";
2716 case SND_SOC_DPCM_STATE_STOP:
2717 return "stop";
2718 case SND_SOC_DPCM_STATE_SUSPEND:
2719 return "suspend";
2720 case SND_SOC_DPCM_STATE_PAUSED:
2721 return "paused";
2722 case SND_SOC_DPCM_STATE_HW_FREE:
2723 return "hw_free";
2724 case SND_SOC_DPCM_STATE_CLOSE:
2725 return "close";
2726 }
2727
2728 return "unknown";
2729 }
2730
2731 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2732 int stream, char *buf, size_t size)
2733 {
2734 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2735 struct snd_soc_dpcm *dpcm;
2736 ssize_t offset = 0;
2737
2738 /* FE state */
2739 offset += snprintf(buf + offset, size - offset,
2740 "[%s - %s]\n", fe->dai_link->name,
2741 stream ? "Capture" : "Playback");
2742
2743 offset += snprintf(buf + offset, size - offset, "State: %s\n",
2744 dpcm_state_string(fe->dpcm[stream].state));
2745
2746 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2747 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2748 offset += snprintf(buf + offset, size - offset,
2749 "Hardware Params: "
2750 "Format = %s, Channels = %d, Rate = %d\n",
2751 snd_pcm_format_name(params_format(params)),
2752 params_channels(params),
2753 params_rate(params));
2754
2755 /* BEs state */
2756 offset += snprintf(buf + offset, size - offset, "Backends:\n");
2757
2758 if (list_empty(&fe->dpcm[stream].be_clients)) {
2759 offset += snprintf(buf + offset, size - offset,
2760 " No active DSP links\n");
2761 goto out;
2762 }
2763
2764 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2765 struct snd_soc_pcm_runtime *be = dpcm->be;
2766 params = &dpcm->hw_params;
2767
2768 offset += snprintf(buf + offset, size - offset,
2769 "- %s\n", be->dai_link->name);
2770
2771 offset += snprintf(buf + offset, size - offset,
2772 " State: %s\n",
2773 dpcm_state_string(be->dpcm[stream].state));
2774
2775 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2776 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2777 offset += snprintf(buf + offset, size - offset,
2778 " Hardware Params: "
2779 "Format = %s, Channels = %d, Rate = %d\n",
2780 snd_pcm_format_name(params_format(params)),
2781 params_channels(params),
2782 params_rate(params));
2783 }
2784
2785 out:
2786 return offset;
2787 }
2788
2789 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
2790 size_t count, loff_t *ppos)
2791 {
2792 struct snd_soc_pcm_runtime *fe = file->private_data;
2793 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
2794 char *buf;
2795
2796 buf = kmalloc(out_count, GFP_KERNEL);
2797 if (!buf)
2798 return -ENOMEM;
2799
2800 if (fe->cpu_dai->driver->playback.channels_min)
2801 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
2802 buf + offset, out_count - offset);
2803
2804 if (fe->cpu_dai->driver->capture.channels_min)
2805 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
2806 buf + offset, out_count - offset);
2807
2808 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
2809
2810 kfree(buf);
2811 return ret;
2812 }
2813
2814 static const struct file_operations dpcm_state_fops = {
2815 .open = simple_open,
2816 .read = dpcm_state_read_file,
2817 .llseek = default_llseek,
2818 };
2819
2820 int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
2821 {
2822 if (!rtd->dai_link)
2823 return 0;
2824
2825 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
2826 rtd->card->debugfs_card_root);
2827 if (!rtd->debugfs_dpcm_root) {
2828 dev_dbg(rtd->dev,
2829 "ASoC: Failed to create dpcm debugfs directory %s\n",
2830 rtd->dai_link->name);
2831 return -EINVAL;
2832 }
2833
2834 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
2835 rtd->debugfs_dpcm_root,
2836 rtd, &dpcm_state_fops);
2837
2838 return 0;
2839 }
2840 #endif
Linux with added FPC-III support