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Merge remote-tracking branches 'asoc/topic/fsl-spdif', 'asoc/topic/imx', 'asoc/topic...
[linux-2.6/btrfs-unstable.git] / sound / soc / soc-pcm.c
blob0ae0e2a9eed714d169635e3a4b6dbbe1451c9d18
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: codec DAI prepare error: %d\n",
750 ret);
751 goto out;
752 }
753 }
754 }
755
756 if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) {
757 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
758 if (ret < 0) {
759 dev_err(cpu_dai->dev,
760 "ASoC: cpu DAI prepare error: %d\n", ret);
761 goto out;
762 }
763 }
764
765 /* cancel any delayed stream shutdown that is pending */
766 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
767 rtd->pop_wait) {
768 rtd->pop_wait = 0;
769 cancel_delayed_work(&rtd->delayed_work);
770 }
771
772 snd_soc_dapm_stream_event(rtd, substream->stream,
773 SND_SOC_DAPM_STREAM_START);
774
775 for (i = 0; i < rtd->num_codecs; i++)
776 snd_soc_dai_digital_mute(rtd->codec_dais[i], 0,
777 substream->stream);
778 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
779
780 out:
781 mutex_unlock(&rtd->pcm_mutex);
782 return ret;
783 }
784
785 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
786 unsigned int mask)
787 {
788 struct snd_interval *interval;
789 int channels = hweight_long(mask);
790
791 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
792 interval->min = channels;
793 interval->max = channels;
794 }
795
796 int soc_dai_hw_params(struct snd_pcm_substream *substream,
797 struct snd_pcm_hw_params *params,
798 struct snd_soc_dai *dai)
799 {
800 int ret;
801
802 if (dai->driver->ops && dai->driver->ops->hw_params) {
803 ret = dai->driver->ops->hw_params(substream, params, dai);
804 if (ret < 0) {
805 dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
806 dai->name, ret);
807 return ret;
808 }
809 }
810
811 return 0;
812 }
813
814 /*
815 * Called by ALSA when the hardware params are set by application. This
816 * function can also be called multiple times and can allocate buffers
817 * (using snd_pcm_lib_* ). It's non-atomic.
818 */
819 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
820 struct snd_pcm_hw_params *params)
821 {
822 struct snd_soc_pcm_runtime *rtd = substream->private_data;
823 struct snd_soc_platform *platform = rtd->platform;
824 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
825 int i, ret = 0;
826
827 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
828
829 ret = soc_pcm_params_symmetry(substream, params);
830 if (ret)
831 goto out;
832
833 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
834 ret = rtd->dai_link->ops->hw_params(substream, params);
835 if (ret < 0) {
836 dev_err(rtd->card->dev, "ASoC: machine hw_params"
837 " failed: %d\n", ret);
838 goto out;
839 }
840 }
841
842 for (i = 0; i < rtd->num_codecs; i++) {
843 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
844 struct snd_pcm_hw_params codec_params;
845
846 /* copy params for each codec */
847 codec_params = *params;
848
849 /* fixup params based on TDM slot masks */
850 if (codec_dai->tx_mask)
851 soc_pcm_codec_params_fixup(&codec_params,
852 codec_dai->tx_mask);
853 if (codec_dai->rx_mask)
854 soc_pcm_codec_params_fixup(&codec_params,
855 codec_dai->rx_mask);
856
857 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
858 if(ret < 0)
859 goto codec_err;
860
861 codec_dai->rate = params_rate(&codec_params);
862 codec_dai->channels = params_channels(&codec_params);
863 codec_dai->sample_bits = snd_pcm_format_physical_width(
864 params_format(&codec_params));
865 }
866
867 ret = soc_dai_hw_params(substream, params, cpu_dai);
868 if (ret < 0)
869 goto interface_err;
870
871 if (platform->driver->ops && platform->driver->ops->hw_params) {
872 ret = platform->driver->ops->hw_params(substream, params);
873 if (ret < 0) {
874 dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
875 platform->component.name, ret);
876 goto platform_err;
877 }
878 }
879
880 /* store the parameters for each DAIs */
881 cpu_dai->rate = params_rate(params);
882 cpu_dai->channels = params_channels(params);
883 cpu_dai->sample_bits =
884 snd_pcm_format_physical_width(params_format(params));
885
886 out:
887 mutex_unlock(&rtd->pcm_mutex);
888 return ret;
889
890 platform_err:
891 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
892 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
893
894 interface_err:
895 i = rtd->num_codecs;
896
897 codec_err:
898 while (--i >= 0) {
899 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
900 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
901 codec_dai->driver->ops->hw_free(substream, codec_dai);
902 codec_dai->rate = 0;
903 }
904
905 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
906 rtd->dai_link->ops->hw_free(substream);
907
908 mutex_unlock(&rtd->pcm_mutex);
909 return ret;
910 }
911
912 /*
913 * Frees resources allocated by hw_params, can be called multiple times
914 */
915 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
916 {
917 struct snd_soc_pcm_runtime *rtd = substream->private_data;
918 struct snd_soc_platform *platform = rtd->platform;
919 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
920 struct snd_soc_dai *codec_dai;
921 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
922 int i;
923
924 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
925
926 /* clear the corresponding DAIs parameters when going to be inactive */
927 if (cpu_dai->active == 1) {
928 cpu_dai->rate = 0;
929 cpu_dai->channels = 0;
930 cpu_dai->sample_bits = 0;
931 }
932
933 for (i = 0; i < rtd->num_codecs; i++) {
934 codec_dai = rtd->codec_dais[i];
935 if (codec_dai->active == 1) {
936 codec_dai->rate = 0;
937 codec_dai->channels = 0;
938 codec_dai->sample_bits = 0;
939 }
940 }
941
942 /* apply codec digital mute */
943 for (i = 0; i < rtd->num_codecs; i++) {
944 if ((playback && rtd->codec_dais[i]->playback_active == 1) ||
945 (!playback && rtd->codec_dais[i]->capture_active == 1))
946 snd_soc_dai_digital_mute(rtd->codec_dais[i], 1,
947 substream->stream);
948 }
949
950 /* free any machine hw params */
951 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
952 rtd->dai_link->ops->hw_free(substream);
953
954 /* free any DMA resources */
955 if (platform->driver->ops && platform->driver->ops->hw_free)
956 platform->driver->ops->hw_free(substream);
957
958 /* now free hw params for the DAIs */
959 for (i = 0; i < rtd->num_codecs; i++) {
960 codec_dai = rtd->codec_dais[i];
961 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
962 codec_dai->driver->ops->hw_free(substream, codec_dai);
963 }
964
965 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
966 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
967
968 mutex_unlock(&rtd->pcm_mutex);
969 return 0;
970 }
971
972 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
973 {
974 struct snd_soc_pcm_runtime *rtd = substream->private_data;
975 struct snd_soc_platform *platform = rtd->platform;
976 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
977 struct snd_soc_dai *codec_dai;
978 int i, ret;
979
980 for (i = 0; i < rtd->num_codecs; i++) {
981 codec_dai = rtd->codec_dais[i];
982 if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) {
983 ret = codec_dai->driver->ops->trigger(substream,
984 cmd, codec_dai);
985 if (ret < 0)
986 return ret;
987 }
988 }
989
990 if (platform->driver->ops && platform->driver->ops->trigger) {
991 ret = platform->driver->ops->trigger(substream, cmd);
992 if (ret < 0)
993 return ret;
994 }
995
996 if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) {
997 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
998 if (ret < 0)
999 return ret;
1000 }
1001
1002 if (rtd->dai_link->ops && rtd->dai_link->ops->trigger) {
1003 ret = rtd->dai_link->ops->trigger(substream, cmd);
1004 if (ret < 0)
1005 return ret;
1006 }
1007
1008 return 0;
1009 }
1010
1011 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1012 int cmd)
1013 {
1014 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1015 struct snd_soc_platform *platform = rtd->platform;
1016 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1017 struct snd_soc_dai *codec_dai;
1018 int i, ret;
1019
1020 for (i = 0; i < rtd->num_codecs; i++) {
1021 codec_dai = rtd->codec_dais[i];
1022 if (codec_dai->driver->ops &&
1023 codec_dai->driver->ops->bespoke_trigger) {
1024 ret = codec_dai->driver->ops->bespoke_trigger(substream,
1025 cmd, codec_dai);
1026 if (ret < 0)
1027 return ret;
1028 }
1029 }
1030
1031 if (platform->driver->bespoke_trigger) {
1032 ret = platform->driver->bespoke_trigger(substream, cmd);
1033 if (ret < 0)
1034 return ret;
1035 }
1036
1037 if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) {
1038 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1039 if (ret < 0)
1040 return ret;
1041 }
1042 return 0;
1043 }
1044 /*
1045 * soc level wrapper for pointer callback
1046 * If cpu_dai, codec_dai, platform driver has the delay callback, than
1047 * the runtime->delay will be updated accordingly.
1048 */
1049 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1050 {
1051 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1052 struct snd_soc_platform *platform = rtd->platform;
1053 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1054 struct snd_soc_dai *codec_dai;
1055 struct snd_pcm_runtime *runtime = substream->runtime;
1056 snd_pcm_uframes_t offset = 0;
1057 snd_pcm_sframes_t delay = 0;
1058 snd_pcm_sframes_t codec_delay = 0;
1059 int i;
1060
1061 if (platform->driver->ops && platform->driver->ops->pointer)
1062 offset = platform->driver->ops->pointer(substream);
1063
1064 if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay)
1065 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1066
1067 for (i = 0; i < rtd->num_codecs; i++) {
1068 codec_dai = rtd->codec_dais[i];
1069 if (codec_dai->driver->ops && codec_dai->driver->ops->delay)
1070 codec_delay = max(codec_delay,
1071 codec_dai->driver->ops->delay(substream,
1072 codec_dai));
1073 }
1074 delay += codec_delay;
1075
1076 /*
1077 * None of the existing platform drivers implement delay(), so
1078 * for now the codec_dai of first multicodec entry is used
1079 */
1080 if (platform->driver->delay)
1081 delay += platform->driver->delay(substream, rtd->codec_dais[0]);
1082
1083 runtime->delay = delay;
1084
1085 return offset;
1086 }
1087
1088 /* connect a FE and BE */
1089 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1090 struct snd_soc_pcm_runtime *be, int stream)
1091 {
1092 struct snd_soc_dpcm *dpcm;
1093
1094 /* only add new dpcms */
1095 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1096 if (dpcm->be == be && dpcm->fe == fe)
1097 return 0;
1098 }
1099
1100 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1101 if (!dpcm)
1102 return -ENOMEM;
1103
1104 dpcm->be = be;
1105 dpcm->fe = fe;
1106 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1107 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1108 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1109 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1110
1111 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1112 stream ? "capture" : "playback", fe->dai_link->name,
1113 stream ? "<-" : "->", be->dai_link->name);
1114
1115 #ifdef CONFIG_DEBUG_FS
1116 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1117 fe->debugfs_dpcm_root, &dpcm->state);
1118 #endif
1119 return 1;
1120 }
1121
1122 /* reparent a BE onto another FE */
1123 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1124 struct snd_soc_pcm_runtime *be, int stream)
1125 {
1126 struct snd_soc_dpcm *dpcm;
1127 struct snd_pcm_substream *fe_substream, *be_substream;
1128
1129 /* reparent if BE is connected to other FEs */
1130 if (!be->dpcm[stream].users)
1131 return;
1132
1133 be_substream = snd_soc_dpcm_get_substream(be, stream);
1134
1135 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
1136 if (dpcm->fe == fe)
1137 continue;
1138
1139 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1140 stream ? "capture" : "playback",
1141 dpcm->fe->dai_link->name,
1142 stream ? "<-" : "->", dpcm->be->dai_link->name);
1143
1144 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1145 be_substream->runtime = fe_substream->runtime;
1146 break;
1147 }
1148 }
1149
1150 /* disconnect a BE and FE */
1151 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1152 {
1153 struct snd_soc_dpcm *dpcm, *d;
1154
1155 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
1156 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1157 stream ? "capture" : "playback",
1158 dpcm->be->dai_link->name);
1159
1160 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1161 continue;
1162
1163 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1164 stream ? "capture" : "playback", fe->dai_link->name,
1165 stream ? "<-" : "->", dpcm->be->dai_link->name);
1166
1167 /* BEs still alive need new FE */
1168 dpcm_be_reparent(fe, dpcm->be, stream);
1169
1170 #ifdef CONFIG_DEBUG_FS
1171 debugfs_remove(dpcm->debugfs_state);
1172 #endif
1173 list_del(&dpcm->list_be);
1174 list_del(&dpcm->list_fe);
1175 kfree(dpcm);
1176 }
1177 }
1178
1179 /* get BE for DAI widget and stream */
1180 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1181 struct snd_soc_dapm_widget *widget, int stream)
1182 {
1183 struct snd_soc_pcm_runtime *be;
1184 int i, j;
1185
1186 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1187 for (i = 0; i < card->num_links; i++) {
1188 be = &card->rtd[i];
1189
1190 if (!be->dai_link->no_pcm)
1191 continue;
1192
1193 if (be->cpu_dai->playback_widget == widget)
1194 return be;
1195
1196 for (j = 0; j < be->num_codecs; j++) {
1197 struct snd_soc_dai *dai = be->codec_dais[j];
1198 if (dai->playback_widget == widget)
1199 return be;
1200 }
1201 }
1202 } else {
1203
1204 for (i = 0; i < card->num_links; i++) {
1205 be = &card->rtd[i];
1206
1207 if (!be->dai_link->no_pcm)
1208 continue;
1209
1210 if (be->cpu_dai->capture_widget == widget)
1211 return be;
1212
1213 for (j = 0; j < be->num_codecs; j++) {
1214 struct snd_soc_dai *dai = be->codec_dais[j];
1215 if (dai->capture_widget == widget)
1216 return be;
1217 }
1218 }
1219 }
1220
1221 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1222 stream ? "capture" : "playback", widget->name);
1223 return NULL;
1224 }
1225
1226 static inline struct snd_soc_dapm_widget *
1227 dai_get_widget(struct snd_soc_dai *dai, int stream)
1228 {
1229 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1230 return dai->playback_widget;
1231 else
1232 return dai->capture_widget;
1233 }
1234
1235 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1236 struct snd_soc_dapm_widget *widget)
1237 {
1238 int i;
1239
1240 for (i = 0; i < list->num_widgets; i++) {
1241 if (widget == list->widgets[i])
1242 return 1;
1243 }
1244
1245 return 0;
1246 }
1247
1248 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1249 int stream, struct snd_soc_dapm_widget_list **list_)
1250 {
1251 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1252 struct snd_soc_dapm_widget_list *list;
1253 int paths;
1254
1255 list = kzalloc(sizeof(struct snd_soc_dapm_widget_list) +
1256 sizeof(struct snd_soc_dapm_widget *), GFP_KERNEL);
1257 if (list == NULL)
1258 return -ENOMEM;
1259
1260 /* get number of valid DAI paths and their widgets */
1261 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, &list);
1262
1263 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1264 stream ? "capture" : "playback");
1265
1266 *list_ = list;
1267 return paths;
1268 }
1269
1270 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1271 struct snd_soc_dapm_widget_list **list_)
1272 {
1273 struct snd_soc_dpcm *dpcm;
1274 struct snd_soc_dapm_widget_list *list = *list_;
1275 struct snd_soc_dapm_widget *widget;
1276 int prune = 0;
1277
1278 /* Destroy any old FE <--> BE connections */
1279 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1280 unsigned int i;
1281
1282 /* is there a valid CPU DAI widget for this BE */
1283 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1284
1285 /* prune the BE if it's no longer in our active list */
1286 if (widget && widget_in_list(list, widget))
1287 continue;
1288
1289 /* is there a valid CODEC DAI widget for this BE */
1290 for (i = 0; i < dpcm->be->num_codecs; i++) {
1291 struct snd_soc_dai *dai = dpcm->be->codec_dais[i];
1292 widget = dai_get_widget(dai, stream);
1293
1294 /* prune the BE if it's no longer in our active list */
1295 if (widget && widget_in_list(list, widget))
1296 continue;
1297 }
1298
1299 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1300 stream ? "capture" : "playback",
1301 dpcm->be->dai_link->name, fe->dai_link->name);
1302 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1303 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1304 prune++;
1305 }
1306
1307 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1308 return prune;
1309 }
1310
1311 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1312 struct snd_soc_dapm_widget_list **list_)
1313 {
1314 struct snd_soc_card *card = fe->card;
1315 struct snd_soc_dapm_widget_list *list = *list_;
1316 struct snd_soc_pcm_runtime *be;
1317 int i, new = 0, err;
1318
1319 /* Create any new FE <--> BE connections */
1320 for (i = 0; i < list->num_widgets; i++) {
1321
1322 switch (list->widgets[i]->id) {
1323 case snd_soc_dapm_dai_in:
1324 case snd_soc_dapm_dai_out:
1325 break;
1326 default:
1327 continue;
1328 }
1329
1330 /* is there a valid BE rtd for this widget */
1331 be = dpcm_get_be(card, list->widgets[i], stream);
1332 if (!be) {
1333 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1334 list->widgets[i]->name);
1335 continue;
1336 }
1337
1338 /* make sure BE is a real BE */
1339 if (!be->dai_link->no_pcm)
1340 continue;
1341
1342 /* don't connect if FE is not running */
1343 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1344 continue;
1345
1346 /* newly connected FE and BE */
1347 err = dpcm_be_connect(fe, be, stream);
1348 if (err < 0) {
1349 dev_err(fe->dev, "ASoC: can't connect %s\n",
1350 list->widgets[i]->name);
1351 break;
1352 } else if (err == 0) /* already connected */
1353 continue;
1354
1355 /* new */
1356 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1357 new++;
1358 }
1359
1360 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1361 return new;
1362 }
1363
1364 /*
1365 * Find the corresponding BE DAIs that source or sink audio to this
1366 * FE substream.
1367 */
1368 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1369 int stream, struct snd_soc_dapm_widget_list **list, int new)
1370 {
1371 if (new)
1372 return dpcm_add_paths(fe, stream, list);
1373 else
1374 return dpcm_prune_paths(fe, stream, list);
1375 }
1376
1377 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1378 {
1379 struct snd_soc_dpcm *dpcm;
1380
1381 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1382 dpcm->be->dpcm[stream].runtime_update =
1383 SND_SOC_DPCM_UPDATE_NO;
1384 }
1385
1386 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1387 int stream)
1388 {
1389 struct snd_soc_dpcm *dpcm;
1390
1391 /* disable any enabled and non active backends */
1392 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1393
1394 struct snd_soc_pcm_runtime *be = dpcm->be;
1395 struct snd_pcm_substream *be_substream =
1396 snd_soc_dpcm_get_substream(be, stream);
1397
1398 if (be->dpcm[stream].users == 0)
1399 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1400 stream ? "capture" : "playback",
1401 be->dpcm[stream].state);
1402
1403 if (--be->dpcm[stream].users != 0)
1404 continue;
1405
1406 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1407 continue;
1408
1409 soc_pcm_close(be_substream);
1410 be_substream->runtime = NULL;
1411 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1412 }
1413 }
1414
1415 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1416 {
1417 struct snd_soc_dpcm *dpcm;
1418 int err, count = 0;
1419
1420 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1421 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1422
1423 struct snd_soc_pcm_runtime *be = dpcm->be;
1424 struct snd_pcm_substream *be_substream =
1425 snd_soc_dpcm_get_substream(be, stream);
1426
1427 if (!be_substream) {
1428 dev_err(be->dev, "ASoC: no backend %s stream\n",
1429 stream ? "capture" : "playback");
1430 continue;
1431 }
1432
1433 /* is this op for this BE ? */
1434 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1435 continue;
1436
1437 /* first time the dpcm is open ? */
1438 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1439 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1440 stream ? "capture" : "playback",
1441 be->dpcm[stream].state);
1442
1443 if (be->dpcm[stream].users++ != 0)
1444 continue;
1445
1446 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1447 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1448 continue;
1449
1450 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1451 stream ? "capture" : "playback", be->dai_link->name);
1452
1453 be_substream->runtime = be->dpcm[stream].runtime;
1454 err = soc_pcm_open(be_substream);
1455 if (err < 0) {
1456 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1457 be->dpcm[stream].users--;
1458 if (be->dpcm[stream].users < 0)
1459 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1460 stream ? "capture" : "playback",
1461 be->dpcm[stream].state);
1462
1463 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1464 goto unwind;
1465 }
1466
1467 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1468 count++;
1469 }
1470
1471 return count;
1472
1473 unwind:
1474 /* disable any enabled and non active backends */
1475 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1476 struct snd_soc_pcm_runtime *be = dpcm->be;
1477 struct snd_pcm_substream *be_substream =
1478 snd_soc_dpcm_get_substream(be, stream);
1479
1480 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1481 continue;
1482
1483 if (be->dpcm[stream].users == 0)
1484 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1485 stream ? "capture" : "playback",
1486 be->dpcm[stream].state);
1487
1488 if (--be->dpcm[stream].users != 0)
1489 continue;
1490
1491 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1492 continue;
1493
1494 soc_pcm_close(be_substream);
1495 be_substream->runtime = NULL;
1496 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1497 }
1498
1499 return err;
1500 }
1501
1502 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1503 struct snd_soc_pcm_stream *stream)
1504 {
1505 runtime->hw.rate_min = stream->rate_min;
1506 runtime->hw.rate_max = stream->rate_max;
1507 runtime->hw.channels_min = stream->channels_min;
1508 runtime->hw.channels_max = stream->channels_max;
1509 if (runtime->hw.formats)
1510 runtime->hw.formats &= stream->formats;
1511 else
1512 runtime->hw.formats = stream->formats;
1513 runtime->hw.rates = stream->rates;
1514 }
1515
1516 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1517 {
1518 struct snd_pcm_runtime *runtime = substream->runtime;
1519 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1520 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1521 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1522
1523 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1524 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1525 else
1526 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1527 }
1528
1529 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1530
1531 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1532 * for avoiding the race with trigger callback.
1533 * If the state is unset and a trigger is pending while the previous operation,
1534 * process the pending trigger action here.
1535 */
1536 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1537 int stream, enum snd_soc_dpcm_update state)
1538 {
1539 struct snd_pcm_substream *substream =
1540 snd_soc_dpcm_get_substream(fe, stream);
1541
1542 snd_pcm_stream_lock_irq(substream);
1543 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1544 dpcm_fe_dai_do_trigger(substream,
1545 fe->dpcm[stream].trigger_pending - 1);
1546 fe->dpcm[stream].trigger_pending = 0;
1547 }
1548 fe->dpcm[stream].runtime_update = state;
1549 snd_pcm_stream_unlock_irq(substream);
1550 }
1551
1552 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1553 {
1554 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1555 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1556 int stream = fe_substream->stream, ret = 0;
1557
1558 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1559
1560 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1561 if (ret < 0) {
1562 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1563 goto be_err;
1564 }
1565
1566 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1567
1568 /* start the DAI frontend */
1569 ret = soc_pcm_open(fe_substream);
1570 if (ret < 0) {
1571 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1572 goto unwind;
1573 }
1574
1575 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1576
1577 dpcm_set_fe_runtime(fe_substream);
1578 snd_pcm_limit_hw_rates(runtime);
1579
1580 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1581 return 0;
1582
1583 unwind:
1584 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1585 be_err:
1586 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1587 return ret;
1588 }
1589
1590 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1591 {
1592 struct snd_soc_dpcm *dpcm;
1593
1594 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1595 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1596
1597 struct snd_soc_pcm_runtime *be = dpcm->be;
1598 struct snd_pcm_substream *be_substream =
1599 snd_soc_dpcm_get_substream(be, stream);
1600
1601 /* is this op for this BE ? */
1602 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1603 continue;
1604
1605 if (be->dpcm[stream].users == 0)
1606 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1607 stream ? "capture" : "playback",
1608 be->dpcm[stream].state);
1609
1610 if (--be->dpcm[stream].users != 0)
1611 continue;
1612
1613 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1614 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1615 continue;
1616
1617 dev_dbg(be->dev, "ASoC: close BE %s\n",
1618 dpcm->fe->dai_link->name);
1619
1620 soc_pcm_close(be_substream);
1621 be_substream->runtime = NULL;
1622
1623 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1624 }
1625 return 0;
1626 }
1627
1628 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1629 {
1630 struct snd_soc_pcm_runtime *fe = substream->private_data;
1631 int stream = substream->stream;
1632
1633 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1634
1635 /* shutdown the BEs */
1636 dpcm_be_dai_shutdown(fe, substream->stream);
1637
1638 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1639
1640 /* now shutdown the frontend */
1641 soc_pcm_close(substream);
1642
1643 /* run the stream event for each BE */
1644 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1645
1646 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1647 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1648 return 0;
1649 }
1650
1651 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1652 {
1653 struct snd_soc_dpcm *dpcm;
1654
1655 /* only hw_params backends that are either sinks or sources
1656 * to this frontend DAI */
1657 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1658
1659 struct snd_soc_pcm_runtime *be = dpcm->be;
1660 struct snd_pcm_substream *be_substream =
1661 snd_soc_dpcm_get_substream(be, stream);
1662
1663 /* is this op for this BE ? */
1664 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1665 continue;
1666
1667 /* only free hw when no longer used - check all FEs */
1668 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1669 continue;
1670
1671 /* do not free hw if this BE is used by other FE */
1672 if (be->dpcm[stream].users > 1)
1673 continue;
1674
1675 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1676 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1677 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1678 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1679 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1680 continue;
1681
1682 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1683 dpcm->fe->dai_link->name);
1684
1685 soc_pcm_hw_free(be_substream);
1686
1687 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1688 }
1689
1690 return 0;
1691 }
1692
1693 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1694 {
1695 struct snd_soc_pcm_runtime *fe = substream->private_data;
1696 int err, stream = substream->stream;
1697
1698 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1699 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1700
1701 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1702
1703 /* call hw_free on the frontend */
1704 err = soc_pcm_hw_free(substream);
1705 if (err < 0)
1706 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
1707 fe->dai_link->name);
1708
1709 /* only hw_params backends that are either sinks or sources
1710 * to this frontend DAI */
1711 err = dpcm_be_dai_hw_free(fe, stream);
1712
1713 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1714 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1715
1716 mutex_unlock(&fe->card->mutex);
1717 return 0;
1718 }
1719
1720 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1721 {
1722 struct snd_soc_dpcm *dpcm;
1723 int ret;
1724
1725 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1726
1727 struct snd_soc_pcm_runtime *be = dpcm->be;
1728 struct snd_pcm_substream *be_substream =
1729 snd_soc_dpcm_get_substream(be, stream);
1730
1731 /* is this op for this BE ? */
1732 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1733 continue;
1734
1735 /* only allow hw_params() if no connected FEs are running */
1736 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1737 continue;
1738
1739 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1740 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1741 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1742 continue;
1743
1744 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1745 dpcm->fe->dai_link->name);
1746
1747 /* copy params for each dpcm */
1748 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1749 sizeof(struct snd_pcm_hw_params));
1750
1751 /* perform any hw_params fixups */
1752 if (be->dai_link->be_hw_params_fixup) {
1753 ret = be->dai_link->be_hw_params_fixup(be,
1754 &dpcm->hw_params);
1755 if (ret < 0) {
1756 dev_err(be->dev,
1757 "ASoC: hw_params BE fixup failed %d\n",
1758 ret);
1759 goto unwind;
1760 }
1761 }
1762
1763 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1764 if (ret < 0) {
1765 dev_err(dpcm->be->dev,
1766 "ASoC: hw_params BE failed %d\n", ret);
1767 goto unwind;
1768 }
1769
1770 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1771 }
1772 return 0;
1773
1774 unwind:
1775 /* disable any enabled and non active backends */
1776 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1777 struct snd_soc_pcm_runtime *be = dpcm->be;
1778 struct snd_pcm_substream *be_substream =
1779 snd_soc_dpcm_get_substream(be, stream);
1780
1781 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1782 continue;
1783
1784 /* only allow hw_free() if no connected FEs are running */
1785 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1786 continue;
1787
1788 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1789 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1790 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1791 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1792 continue;
1793
1794 soc_pcm_hw_free(be_substream);
1795 }
1796
1797 return ret;
1798 }
1799
1800 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1801 struct snd_pcm_hw_params *params)
1802 {
1803 struct snd_soc_pcm_runtime *fe = substream->private_data;
1804 int ret, stream = substream->stream;
1805
1806 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1807 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1808
1809 memcpy(&fe->dpcm[substream->stream].hw_params, params,
1810 sizeof(struct snd_pcm_hw_params));
1811 ret = dpcm_be_dai_hw_params(fe, substream->stream);
1812 if (ret < 0) {
1813 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
1814 goto out;
1815 }
1816
1817 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1818 fe->dai_link->name, params_rate(params),
1819 params_channels(params), params_format(params));
1820
1821 /* call hw_params on the frontend */
1822 ret = soc_pcm_hw_params(substream, params);
1823 if (ret < 0) {
1824 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
1825 dpcm_be_dai_hw_free(fe, stream);
1826 } else
1827 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1828
1829 out:
1830 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1831 mutex_unlock(&fe->card->mutex);
1832 return ret;
1833 }
1834
1835 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
1836 struct snd_pcm_substream *substream, int cmd)
1837 {
1838 int ret;
1839
1840 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
1841 dpcm->fe->dai_link->name, cmd);
1842
1843 ret = soc_pcm_trigger(substream, cmd);
1844 if (ret < 0)
1845 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
1846
1847 return ret;
1848 }
1849
1850 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
1851 int cmd)
1852 {
1853 struct snd_soc_dpcm *dpcm;
1854 int ret = 0;
1855
1856 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1857
1858 struct snd_soc_pcm_runtime *be = dpcm->be;
1859 struct snd_pcm_substream *be_substream =
1860 snd_soc_dpcm_get_substream(be, stream);
1861
1862 /* is this op for this BE ? */
1863 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1864 continue;
1865
1866 switch (cmd) {
1867 case SNDRV_PCM_TRIGGER_START:
1868 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1869 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1870 continue;
1871
1872 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1873 if (ret)
1874 return ret;
1875
1876 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1877 break;
1878 case SNDRV_PCM_TRIGGER_RESUME:
1879 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1880 continue;
1881
1882 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1883 if (ret)
1884 return ret;
1885
1886 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1887 break;
1888 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1889 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
1890 continue;
1891
1892 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1893 if (ret)
1894 return ret;
1895
1896 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1897 break;
1898 case SNDRV_PCM_TRIGGER_STOP:
1899 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1900 continue;
1901
1902 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1903 continue;
1904
1905 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1906 if (ret)
1907 return ret;
1908
1909 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1910 break;
1911 case SNDRV_PCM_TRIGGER_SUSPEND:
1912 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1913 continue;
1914
1915 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1916 continue;
1917
1918 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1919 if (ret)
1920 return ret;
1921
1922 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
1923 break;
1924 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1925 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1926 continue;
1927
1928 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1929 continue;
1930
1931 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1932 if (ret)
1933 return ret;
1934
1935 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
1936 break;
1937 }
1938 }
1939
1940 return ret;
1941 }
1942 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
1943
1944 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
1945 {
1946 struct snd_soc_pcm_runtime *fe = substream->private_data;
1947 int stream = substream->stream, ret;
1948 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1949
1950 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1951
1952 switch (trigger) {
1953 case SND_SOC_DPCM_TRIGGER_PRE:
1954 /* call trigger on the frontend before the backend. */
1955
1956 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
1957 fe->dai_link->name, cmd);
1958
1959 ret = soc_pcm_trigger(substream, cmd);
1960 if (ret < 0) {
1961 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1962 goto out;
1963 }
1964
1965 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1966 break;
1967 case SND_SOC_DPCM_TRIGGER_POST:
1968 /* call trigger on the frontend after the backend. */
1969
1970 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1971 if (ret < 0) {
1972 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1973 goto out;
1974 }
1975
1976 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
1977 fe->dai_link->name, cmd);
1978
1979 ret = soc_pcm_trigger(substream, cmd);
1980 break;
1981 case SND_SOC_DPCM_TRIGGER_BESPOKE:
1982 /* bespoke trigger() - handles both FE and BEs */
1983
1984 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
1985 fe->dai_link->name, cmd);
1986
1987 ret = soc_pcm_bespoke_trigger(substream, cmd);
1988 if (ret < 0) {
1989 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1990 goto out;
1991 }
1992 break;
1993 default:
1994 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
1995 fe->dai_link->name);
1996 ret = -EINVAL;
1997 goto out;
1998 }
1999
2000 switch (cmd) {
2001 case SNDRV_PCM_TRIGGER_START:
2002 case SNDRV_PCM_TRIGGER_RESUME:
2003 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2004 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2005 break;
2006 case SNDRV_PCM_TRIGGER_STOP:
2007 case SNDRV_PCM_TRIGGER_SUSPEND:
2008 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2009 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2010 break;
2011 }
2012
2013 out:
2014 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2015 return ret;
2016 }
2017
2018 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2019 {
2020 struct snd_soc_pcm_runtime *fe = substream->private_data;
2021 int stream = substream->stream;
2022
2023 /* if FE's runtime_update is already set, we're in race;
2024 * process this trigger later at exit
2025 */
2026 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2027 fe->dpcm[stream].trigger_pending = cmd + 1;
2028 return 0; /* delayed, assuming it's successful */
2029 }
2030
2031 /* we're alone, let's trigger */
2032 return dpcm_fe_dai_do_trigger(substream, cmd);
2033 }
2034
2035 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2036 {
2037 struct snd_soc_dpcm *dpcm;
2038 int ret = 0;
2039
2040 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2041
2042 struct snd_soc_pcm_runtime *be = dpcm->be;
2043 struct snd_pcm_substream *be_substream =
2044 snd_soc_dpcm_get_substream(be, stream);
2045
2046 /* is this op for this BE ? */
2047 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2048 continue;
2049
2050 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2051 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2052 continue;
2053
2054 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2055 dpcm->fe->dai_link->name);
2056
2057 ret = soc_pcm_prepare(be_substream);
2058 if (ret < 0) {
2059 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2060 ret);
2061 break;
2062 }
2063
2064 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2065 }
2066 return ret;
2067 }
2068
2069 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2070 {
2071 struct snd_soc_pcm_runtime *fe = substream->private_data;
2072 int stream = substream->stream, ret = 0;
2073
2074 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2075
2076 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2077
2078 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2079
2080 /* there is no point preparing this FE if there are no BEs */
2081 if (list_empty(&fe->dpcm[stream].be_clients)) {
2082 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2083 fe->dai_link->name);
2084 ret = -EINVAL;
2085 goto out;
2086 }
2087
2088 ret = dpcm_be_dai_prepare(fe, substream->stream);
2089 if (ret < 0)
2090 goto out;
2091
2092 /* call prepare on the frontend */
2093 ret = soc_pcm_prepare(substream);
2094 if (ret < 0) {
2095 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2096 fe->dai_link->name);
2097 goto out;
2098 }
2099
2100 /* run the stream event for each BE */
2101 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2102 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2103
2104 out:
2105 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2106 mutex_unlock(&fe->card->mutex);
2107
2108 return ret;
2109 }
2110
2111 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2112 unsigned int cmd, void *arg)
2113 {
2114 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2115 struct snd_soc_platform *platform = rtd->platform;
2116
2117 if (platform->driver->ops && platform->driver->ops->ioctl)
2118 return platform->driver->ops->ioctl(substream, cmd, arg);
2119 return snd_pcm_lib_ioctl(substream, cmd, arg);
2120 }
2121
2122 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2123 {
2124 struct snd_pcm_substream *substream =
2125 snd_soc_dpcm_get_substream(fe, stream);
2126 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2127 int err;
2128
2129 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2130 stream ? "capture" : "playback", fe->dai_link->name);
2131
2132 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2133 /* call bespoke trigger - FE takes care of all BE triggers */
2134 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2135 fe->dai_link->name);
2136
2137 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2138 if (err < 0)
2139 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2140 } else {
2141 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2142 fe->dai_link->name);
2143
2144 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2145 if (err < 0)
2146 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2147 }
2148
2149 err = dpcm_be_dai_hw_free(fe, stream);
2150 if (err < 0)
2151 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2152
2153 err = dpcm_be_dai_shutdown(fe, stream);
2154 if (err < 0)
2155 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2156
2157 /* run the stream event for each BE */
2158 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2159
2160 return 0;
2161 }
2162
2163 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2164 {
2165 struct snd_pcm_substream *substream =
2166 snd_soc_dpcm_get_substream(fe, stream);
2167 struct snd_soc_dpcm *dpcm;
2168 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2169 int ret;
2170
2171 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2172 stream ? "capture" : "playback", fe->dai_link->name);
2173
2174 /* Only start the BE if the FE is ready */
2175 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2176 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2177 return -EINVAL;
2178
2179 /* startup must always be called for new BEs */
2180 ret = dpcm_be_dai_startup(fe, stream);
2181 if (ret < 0)
2182 goto disconnect;
2183
2184 /* keep going if FE state is > open */
2185 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2186 return 0;
2187
2188 ret = dpcm_be_dai_hw_params(fe, stream);
2189 if (ret < 0)
2190 goto close;
2191
2192 /* keep going if FE state is > hw_params */
2193 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2194 return 0;
2195
2196
2197 ret = dpcm_be_dai_prepare(fe, stream);
2198 if (ret < 0)
2199 goto hw_free;
2200
2201 /* run the stream event for each BE */
2202 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2203
2204 /* keep going if FE state is > prepare */
2205 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2206 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2207 return 0;
2208
2209 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2210 /* call trigger on the frontend - FE takes care of all BE triggers */
2211 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2212 fe->dai_link->name);
2213
2214 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2215 if (ret < 0) {
2216 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2217 goto hw_free;
2218 }
2219 } else {
2220 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2221 fe->dai_link->name);
2222
2223 ret = dpcm_be_dai_trigger(fe, stream,
2224 SNDRV_PCM_TRIGGER_START);
2225 if (ret < 0) {
2226 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2227 goto hw_free;
2228 }
2229 }
2230
2231 return 0;
2232
2233 hw_free:
2234 dpcm_be_dai_hw_free(fe, stream);
2235 close:
2236 dpcm_be_dai_shutdown(fe, stream);
2237 disconnect:
2238 /* disconnect any non started BEs */
2239 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2240 struct snd_soc_pcm_runtime *be = dpcm->be;
2241 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2242 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2243 }
2244
2245 return ret;
2246 }
2247
2248 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2249 {
2250 int ret;
2251
2252 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2253 ret = dpcm_run_update_startup(fe, stream);
2254 if (ret < 0)
2255 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2256 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2257
2258 return ret;
2259 }
2260
2261 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2262 {
2263 int ret;
2264
2265 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2266 ret = dpcm_run_update_shutdown(fe, stream);
2267 if (ret < 0)
2268 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2269 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2270
2271 return ret;
2272 }
2273
2274 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2275 * any DAI links.
2276 */
2277 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2278 {
2279 int i, old, new, paths;
2280
2281 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2282 for (i = 0; i < card->num_rtd; i++) {
2283 struct snd_soc_dapm_widget_list *list;
2284 struct snd_soc_pcm_runtime *fe = &card->rtd[i];
2285
2286 /* make sure link is FE */
2287 if (!fe->dai_link->dynamic)
2288 continue;
2289
2290 /* only check active links */
2291 if (!fe->cpu_dai->active)
2292 continue;
2293
2294 /* DAPM sync will call this to update DSP paths */
2295 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
2296 fe->dai_link->name);
2297
2298 /* skip if FE doesn't have playback capability */
2299 if (!fe->cpu_dai->driver->playback.channels_min
2300 || !fe->codec_dai->driver->playback.channels_min)
2301 goto capture;
2302
2303 /* skip if FE isn't currently playing */
2304 if (!fe->cpu_dai->playback_active
2305 || !fe->codec_dai->playback_active)
2306 goto capture;
2307
2308 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2309 if (paths < 0) {
2310 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2311 fe->dai_link->name, "playback");
2312 mutex_unlock(&card->mutex);
2313 return paths;
2314 }
2315
2316 /* update any new playback paths */
2317 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
2318 if (new) {
2319 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2320 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2321 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2322 }
2323
2324 /* update any old playback paths */
2325 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
2326 if (old) {
2327 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2328 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2329 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2330 }
2331
2332 dpcm_path_put(&list);
2333 capture:
2334 /* skip if FE doesn't have capture capability */
2335 if (!fe->cpu_dai->driver->capture.channels_min
2336 || !fe->codec_dai->driver->capture.channels_min)
2337 continue;
2338
2339 /* skip if FE isn't currently capturing */
2340 if (!fe->cpu_dai->capture_active
2341 || !fe->codec_dai->capture_active)
2342 continue;
2343
2344 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2345 if (paths < 0) {
2346 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2347 fe->dai_link->name, "capture");
2348 mutex_unlock(&card->mutex);
2349 return paths;
2350 }
2351
2352 /* update any new capture paths */
2353 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
2354 if (new) {
2355 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2356 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2357 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2358 }
2359
2360 /* update any old capture paths */
2361 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
2362 if (old) {
2363 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2364 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2365 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2366 }
2367
2368 dpcm_path_put(&list);
2369 }
2370
2371 mutex_unlock(&card->mutex);
2372 return 0;
2373 }
2374 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2375 {
2376 struct snd_soc_dpcm *dpcm;
2377 struct list_head *clients =
2378 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
2379
2380 list_for_each_entry(dpcm, clients, list_be) {
2381
2382 struct snd_soc_pcm_runtime *be = dpcm->be;
2383 int i;
2384
2385 if (be->dai_link->ignore_suspend)
2386 continue;
2387
2388 for (i = 0; i < be->num_codecs; i++) {
2389 struct snd_soc_dai *dai = be->codec_dais[i];
2390 struct snd_soc_dai_driver *drv = dai->driver;
2391
2392 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2393 be->dai_link->name);
2394
2395 if (drv->ops && drv->ops->digital_mute &&
2396 dai->playback_active)
2397 drv->ops->digital_mute(dai, mute);
2398 }
2399 }
2400
2401 return 0;
2402 }
2403
2404 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2405 {
2406 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2407 struct snd_soc_dpcm *dpcm;
2408 struct snd_soc_dapm_widget_list *list;
2409 int ret;
2410 int stream = fe_substream->stream;
2411
2412 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2413 fe->dpcm[stream].runtime = fe_substream->runtime;
2414
2415 ret = dpcm_path_get(fe, stream, &list);
2416 if (ret < 0) {
2417 mutex_unlock(&fe->card->mutex);
2418 return ret;
2419 } else if (ret == 0) {
2420 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2421 fe->dai_link->name, stream ? "capture" : "playback");
2422 }
2423
2424 /* calculate valid and active FE <-> BE dpcms */
2425 dpcm_process_paths(fe, stream, &list, 1);
2426
2427 ret = dpcm_fe_dai_startup(fe_substream);
2428 if (ret < 0) {
2429 /* clean up all links */
2430 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2431 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2432
2433 dpcm_be_disconnect(fe, stream);
2434 fe->dpcm[stream].runtime = NULL;
2435 }
2436
2437 dpcm_clear_pending_state(fe, stream);
2438 dpcm_path_put(&list);
2439 mutex_unlock(&fe->card->mutex);
2440 return ret;
2441 }
2442
2443 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2444 {
2445 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2446 struct snd_soc_dpcm *dpcm;
2447 int stream = fe_substream->stream, ret;
2448
2449 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2450 ret = dpcm_fe_dai_shutdown(fe_substream);
2451
2452 /* mark FE's links ready to prune */
2453 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2454 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2455
2456 dpcm_be_disconnect(fe, stream);
2457
2458 fe->dpcm[stream].runtime = NULL;
2459 mutex_unlock(&fe->card->mutex);
2460 return ret;
2461 }
2462
2463 /* create a new pcm */
2464 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2465 {
2466 struct snd_soc_platform *platform = rtd->platform;
2467 struct snd_soc_dai *codec_dai;
2468 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2469 struct snd_pcm *pcm;
2470 char new_name[64];
2471 int ret = 0, playback = 0, capture = 0;
2472 int i;
2473
2474 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2475 playback = rtd->dai_link->dpcm_playback;
2476 capture = rtd->dai_link->dpcm_capture;
2477 } else {
2478 for (i = 0; i < rtd->num_codecs; i++) {
2479 codec_dai = rtd->codec_dais[i];
2480 if (codec_dai->driver->playback.channels_min)
2481 playback = 1;
2482 if (codec_dai->driver->capture.channels_min)
2483 capture = 1;
2484 }
2485
2486 capture = capture && cpu_dai->driver->capture.channels_min;
2487 playback = playback && cpu_dai->driver->playback.channels_min;
2488 }
2489
2490 if (rtd->dai_link->playback_only) {
2491 playback = 1;
2492 capture = 0;
2493 }
2494
2495 if (rtd->dai_link->capture_only) {
2496 playback = 0;
2497 capture = 1;
2498 }
2499
2500 /* create the PCM */
2501 if (rtd->dai_link->no_pcm) {
2502 snprintf(new_name, sizeof(new_name), "(%s)",
2503 rtd->dai_link->stream_name);
2504
2505 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2506 playback, capture, &pcm);
2507 } else {
2508 if (rtd->dai_link->dynamic)
2509 snprintf(new_name, sizeof(new_name), "%s (*)",
2510 rtd->dai_link->stream_name);
2511 else
2512 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2513 rtd->dai_link->stream_name,
2514 (rtd->num_codecs > 1) ?
2515 "multicodec" : rtd->codec_dai->name, num);
2516
2517 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2518 capture, &pcm);
2519 }
2520 if (ret < 0) {
2521 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2522 rtd->dai_link->name);
2523 return ret;
2524 }
2525 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2526
2527 /* DAPM dai link stream work */
2528 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2529
2530 rtd->pcm = pcm;
2531 pcm->private_data = rtd;
2532
2533 if (rtd->dai_link->no_pcm) {
2534 if (playback)
2535 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2536 if (capture)
2537 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2538 goto out;
2539 }
2540
2541 /* ASoC PCM operations */
2542 if (rtd->dai_link->dynamic) {
2543 rtd->ops.open = dpcm_fe_dai_open;
2544 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2545 rtd->ops.prepare = dpcm_fe_dai_prepare;
2546 rtd->ops.trigger = dpcm_fe_dai_trigger;
2547 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2548 rtd->ops.close = dpcm_fe_dai_close;
2549 rtd->ops.pointer = soc_pcm_pointer;
2550 rtd->ops.ioctl = soc_pcm_ioctl;
2551 } else {
2552 rtd->ops.open = soc_pcm_open;
2553 rtd->ops.hw_params = soc_pcm_hw_params;
2554 rtd->ops.prepare = soc_pcm_prepare;
2555 rtd->ops.trigger = soc_pcm_trigger;
2556 rtd->ops.hw_free = soc_pcm_hw_free;
2557 rtd->ops.close = soc_pcm_close;
2558 rtd->ops.pointer = soc_pcm_pointer;
2559 rtd->ops.ioctl = soc_pcm_ioctl;
2560 }
2561
2562 if (platform->driver->ops) {
2563 rtd->ops.ack = platform->driver->ops->ack;
2564 rtd->ops.copy = platform->driver->ops->copy;
2565 rtd->ops.silence = platform->driver->ops->silence;
2566 rtd->ops.page = platform->driver->ops->page;
2567 rtd->ops.mmap = platform->driver->ops->mmap;
2568 }
2569
2570 if (playback)
2571 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2572
2573 if (capture)
2574 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2575
2576 if (platform->driver->pcm_new) {
2577 ret = platform->driver->pcm_new(rtd);
2578 if (ret < 0) {
2579 dev_err(platform->dev,
2580 "ASoC: pcm constructor failed: %d\n",
2581 ret);
2582 return ret;
2583 }
2584 }
2585
2586 pcm->private_free = platform->driver->pcm_free;
2587 out:
2588 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
2589 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
2590 cpu_dai->name);
2591 return ret;
2592 }
2593
2594 /* is the current PCM operation for this FE ? */
2595 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2596 {
2597 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2598 return 1;
2599 return 0;
2600 }
2601 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2602
2603 /* is the current PCM operation for this BE ? */
2604 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2605 struct snd_soc_pcm_runtime *be, int stream)
2606 {
2607 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2608 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2609 be->dpcm[stream].runtime_update))
2610 return 1;
2611 return 0;
2612 }
2613 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2614
2615 /* get the substream for this BE */
2616 struct snd_pcm_substream *
2617 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2618 {
2619 return be->pcm->streams[stream].substream;
2620 }
2621 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2622
2623 /* get the BE runtime state */
2624 enum snd_soc_dpcm_state
2625 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2626 {
2627 return be->dpcm[stream].state;
2628 }
2629 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
2630
2631 /* set the BE runtime state */
2632 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
2633 int stream, enum snd_soc_dpcm_state state)
2634 {
2635 be->dpcm[stream].state = state;
2636 }
2637 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
2638
2639 /*
2640 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2641 * are not running, paused or suspended for the specified stream direction.
2642 */
2643 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2644 struct snd_soc_pcm_runtime *be, int stream)
2645 {
2646 struct snd_soc_dpcm *dpcm;
2647 int state;
2648
2649 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2650
2651 if (dpcm->fe == fe)
2652 continue;
2653
2654 state = dpcm->fe->dpcm[stream].state;
2655 if (state == SND_SOC_DPCM_STATE_START ||
2656 state == SND_SOC_DPCM_STATE_PAUSED ||
2657 state == SND_SOC_DPCM_STATE_SUSPEND)
2658 return 0;
2659 }
2660
2661 /* it's safe to free/stop this BE DAI */
2662 return 1;
2663 }
2664 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2665
2666 /*
2667 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2668 * running, paused or suspended for the specified stream direction.
2669 */
2670 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2671 struct snd_soc_pcm_runtime *be, int stream)
2672 {
2673 struct snd_soc_dpcm *dpcm;
2674 int state;
2675
2676 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2677
2678 if (dpcm->fe == fe)
2679 continue;
2680
2681 state = dpcm->fe->dpcm[stream].state;
2682 if (state == SND_SOC_DPCM_STATE_START ||
2683 state == SND_SOC_DPCM_STATE_PAUSED ||
2684 state == SND_SOC_DPCM_STATE_SUSPEND ||
2685 state == SND_SOC_DPCM_STATE_PREPARE)
2686 return 0;
2687 }
2688
2689 /* it's safe to change hw_params */
2690 return 1;
2691 }
2692 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2693
2694 int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
2695 int cmd, struct snd_soc_platform *platform)
2696 {
2697 if (platform->driver->ops && platform->driver->ops->trigger)
2698 return platform->driver->ops->trigger(substream, cmd);
2699 return 0;
2700 }
2701 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger);
2702
2703 #ifdef CONFIG_DEBUG_FS
2704 static char *dpcm_state_string(enum snd_soc_dpcm_state state)
2705 {
2706 switch (state) {
2707 case SND_SOC_DPCM_STATE_NEW:
2708 return "new";
2709 case SND_SOC_DPCM_STATE_OPEN:
2710 return "open";
2711 case SND_SOC_DPCM_STATE_HW_PARAMS:
2712 return "hw_params";
2713 case SND_SOC_DPCM_STATE_PREPARE:
2714 return "prepare";
2715 case SND_SOC_DPCM_STATE_START:
2716 return "start";
2717 case SND_SOC_DPCM_STATE_STOP:
2718 return "stop";
2719 case SND_SOC_DPCM_STATE_SUSPEND:
2720 return "suspend";
2721 case SND_SOC_DPCM_STATE_PAUSED:
2722 return "paused";
2723 case SND_SOC_DPCM_STATE_HW_FREE:
2724 return "hw_free";
2725 case SND_SOC_DPCM_STATE_CLOSE:
2726 return "close";
2727 }
2728
2729 return "unknown";
2730 }
2731
2732 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2733 int stream, char *buf, size_t size)
2734 {
2735 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2736 struct snd_soc_dpcm *dpcm;
2737 ssize_t offset = 0;
2738
2739 /* FE state */
2740 offset += snprintf(buf + offset, size - offset,
2741 "[%s - %s]\n", fe->dai_link->name,
2742 stream ? "Capture" : "Playback");
2743
2744 offset += snprintf(buf + offset, size - offset, "State: %s\n",
2745 dpcm_state_string(fe->dpcm[stream].state));
2746
2747 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2748 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2749 offset += snprintf(buf + offset, size - offset,
2750 "Hardware Params: "
2751 "Format = %s, Channels = %d, Rate = %d\n",
2752 snd_pcm_format_name(params_format(params)),
2753 params_channels(params),
2754 params_rate(params));
2755
2756 /* BEs state */
2757 offset += snprintf(buf + offset, size - offset, "Backends:\n");
2758
2759 if (list_empty(&fe->dpcm[stream].be_clients)) {
2760 offset += snprintf(buf + offset, size - offset,
2761 " No active DSP links\n");
2762 goto out;
2763 }
2764
2765 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2766 struct snd_soc_pcm_runtime *be = dpcm->be;
2767 params = &dpcm->hw_params;
2768
2769 offset += snprintf(buf + offset, size - offset,
2770 "- %s\n", be->dai_link->name);
2771
2772 offset += snprintf(buf + offset, size - offset,
2773 " State: %s\n",
2774 dpcm_state_string(be->dpcm[stream].state));
2775
2776 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2777 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2778 offset += snprintf(buf + offset, size - offset,
2779 " Hardware Params: "
2780 "Format = %s, Channels = %d, Rate = %d\n",
2781 snd_pcm_format_name(params_format(params)),
2782 params_channels(params),
2783 params_rate(params));
2784 }
2785
2786 out:
2787 return offset;
2788 }
2789
2790 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
2791 size_t count, loff_t *ppos)
2792 {
2793 struct snd_soc_pcm_runtime *fe = file->private_data;
2794 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
2795 char *buf;
2796
2797 buf = kmalloc(out_count, GFP_KERNEL);
2798 if (!buf)
2799 return -ENOMEM;
2800
2801 if (fe->cpu_dai->driver->playback.channels_min)
2802 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
2803 buf + offset, out_count - offset);
2804
2805 if (fe->cpu_dai->driver->capture.channels_min)
2806 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
2807 buf + offset, out_count - offset);
2808
2809 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
2810
2811 kfree(buf);
2812 return ret;
2813 }
2814
2815 static const struct file_operations dpcm_state_fops = {
2816 .open = simple_open,
2817 .read = dpcm_state_read_file,
2818 .llseek = default_llseek,
2819 };
2820
2821 int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
2822 {
2823 if (!rtd->dai_link)
2824 return 0;
2825
2826 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
2827 rtd->card->debugfs_card_root);
2828 if (!rtd->debugfs_dpcm_root) {
2829 dev_dbg(rtd->dev,
2830 "ASoC: Failed to create dpcm debugfs directory %s\n",
2831 rtd->dai_link->name);
2832 return -EINVAL;
2833 }
2834
2835 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
2836 rtd->debugfs_dpcm_root,
2837 rtd, &dpcm_state_fops);
2838
2839 return 0;
2840 }
2841 #endif
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