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Input: elan_i2c - don't require known iap version
[linux-stable.git] / sound / soc / soc-pcm.c
blob256b9c91aa94316979a270aa7459c83a0659b5da
1 /*
2 * soc-pcm.c -- ALSA SoC PCM
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Authors: Liam Girdwood <lrg@ti.com>
10 * Mark Brown <broonie@opensource.wolfsonmicro.com>
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 *
17 */
18
19 #include <linux/kernel.h>
20 #include <linux/init.h>
21 #include <linux/delay.h>
22 #include <linux/pinctrl/consumer.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/slab.h>
25 #include <linux/workqueue.h>
26 #include <linux/export.h>
27 #include <linux/debugfs.h>
28 #include <sound/core.h>
29 #include <sound/pcm.h>
30 #include <sound/pcm_params.h>
31 #include <sound/soc.h>
32 #include <sound/soc-dpcm.h>
33 #include <sound/initval.h>
34
35 #define DPCM_MAX_BE_USERS 8
36
37 /**
38 * snd_soc_runtime_activate() - Increment active count for PCM runtime components
39 * @rtd: ASoC PCM runtime that is activated
40 * @stream: Direction of the PCM stream
41 *
42 * Increments the active count for all the DAIs and components attached to a PCM
43 * runtime. Should typically be called when a stream is opened.
44 *
45 * Must be called with the rtd->pcm_mutex being held
46 */
47 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
48 {
49 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
50 int i;
51
52 lockdep_assert_held(&rtd->pcm_mutex);
53
54 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
55 cpu_dai->playback_active++;
56 for (i = 0; i < rtd->num_codecs; i++)
57 rtd->codec_dais[i]->playback_active++;
58 } else {
59 cpu_dai->capture_active++;
60 for (i = 0; i < rtd->num_codecs; i++)
61 rtd->codec_dais[i]->capture_active++;
62 }
63
64 cpu_dai->active++;
65 cpu_dai->component->active++;
66 for (i = 0; i < rtd->num_codecs; i++) {
67 rtd->codec_dais[i]->active++;
68 rtd->codec_dais[i]->component->active++;
69 }
70 }
71
72 /**
73 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
74 * @rtd: ASoC PCM runtime that is deactivated
75 * @stream: Direction of the PCM stream
76 *
77 * Decrements the active count for all the DAIs and components attached to a PCM
78 * runtime. Should typically be called when a stream is closed.
79 *
80 * Must be called with the rtd->pcm_mutex being held
81 */
82 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
83 {
84 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
85 int i;
86
87 lockdep_assert_held(&rtd->pcm_mutex);
88
89 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
90 cpu_dai->playback_active--;
91 for (i = 0; i < rtd->num_codecs; i++)
92 rtd->codec_dais[i]->playback_active--;
93 } else {
94 cpu_dai->capture_active--;
95 for (i = 0; i < rtd->num_codecs; i++)
96 rtd->codec_dais[i]->capture_active--;
97 }
98
99 cpu_dai->active--;
100 cpu_dai->component->active--;
101 for (i = 0; i < rtd->num_codecs; i++) {
102 rtd->codec_dais[i]->component->active--;
103 rtd->codec_dais[i]->active--;
104 }
105 }
106
107 /**
108 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
109 * @rtd: The ASoC PCM runtime that should be checked.
110 *
111 * This function checks whether the power down delay should be ignored for a
112 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
113 * been configured to ignore the delay, or if none of the components benefits
114 * from having the delay.
115 */
116 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
117 {
118 int i;
119 bool ignore = true;
120
121 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
122 return true;
123
124 for (i = 0; i < rtd->num_codecs; i++)
125 ignore &= rtd->codec_dais[i]->component->ignore_pmdown_time;
126
127 return rtd->cpu_dai->component->ignore_pmdown_time && ignore;
128 }
129
130 /**
131 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
132 * @substream: the pcm substream
133 * @hw: the hardware parameters
134 *
135 * Sets the substream runtime hardware parameters.
136 */
137 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
138 const struct snd_pcm_hardware *hw)
139 {
140 struct snd_pcm_runtime *runtime = substream->runtime;
141 runtime->hw.info = hw->info;
142 runtime->hw.formats = hw->formats;
143 runtime->hw.period_bytes_min = hw->period_bytes_min;
144 runtime->hw.period_bytes_max = hw->period_bytes_max;
145 runtime->hw.periods_min = hw->periods_min;
146 runtime->hw.periods_max = hw->periods_max;
147 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
148 runtime->hw.fifo_size = hw->fifo_size;
149 return 0;
150 }
151 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
152
153 /* DPCM stream event, send event to FE and all active BEs. */
154 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
155 int event)
156 {
157 struct snd_soc_dpcm *dpcm;
158
159 list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
160
161 struct snd_soc_pcm_runtime *be = dpcm->be;
162
163 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
164 be->dai_link->name, event, dir);
165
166 snd_soc_dapm_stream_event(be, dir, event);
167 }
168
169 snd_soc_dapm_stream_event(fe, dir, event);
170
171 return 0;
172 }
173
174 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
175 struct snd_soc_dai *soc_dai)
176 {
177 struct snd_soc_pcm_runtime *rtd = substream->private_data;
178 int ret;
179
180 if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
181 rtd->dai_link->symmetric_rates)) {
182 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
183 soc_dai->rate);
184
185 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
186 SNDRV_PCM_HW_PARAM_RATE,
187 soc_dai->rate, soc_dai->rate);
188 if (ret < 0) {
189 dev_err(soc_dai->dev,
190 "ASoC: Unable to apply rate constraint: %d\n",
191 ret);
192 return ret;
193 }
194 }
195
196 if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
197 rtd->dai_link->symmetric_channels)) {
198 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
199 soc_dai->channels);
200
201 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
202 SNDRV_PCM_HW_PARAM_CHANNELS,
203 soc_dai->channels,
204 soc_dai->channels);
205 if (ret < 0) {
206 dev_err(soc_dai->dev,
207 "ASoC: Unable to apply channel symmetry constraint: %d\n",
208 ret);
209 return ret;
210 }
211 }
212
213 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
214 rtd->dai_link->symmetric_samplebits)) {
215 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
216 soc_dai->sample_bits);
217
218 ret = snd_pcm_hw_constraint_minmax(substream->runtime,
219 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
220 soc_dai->sample_bits,
221 soc_dai->sample_bits);
222 if (ret < 0) {
223 dev_err(soc_dai->dev,
224 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
225 ret);
226 return ret;
227 }
228 }
229
230 return 0;
231 }
232
233 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
234 struct snd_pcm_hw_params *params)
235 {
236 struct snd_soc_pcm_runtime *rtd = substream->private_data;
237 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
238 unsigned int rate, channels, sample_bits, symmetry, i;
239
240 rate = params_rate(params);
241 channels = params_channels(params);
242 sample_bits = snd_pcm_format_physical_width(params_format(params));
243
244 /* reject unmatched parameters when applying symmetry */
245 symmetry = cpu_dai->driver->symmetric_rates ||
246 rtd->dai_link->symmetric_rates;
247
248 for (i = 0; i < rtd->num_codecs; i++)
249 symmetry |= rtd->codec_dais[i]->driver->symmetric_rates;
250
251 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
252 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
253 cpu_dai->rate, rate);
254 return -EINVAL;
255 }
256
257 symmetry = cpu_dai->driver->symmetric_channels ||
258 rtd->dai_link->symmetric_channels;
259
260 for (i = 0; i < rtd->num_codecs; i++)
261 symmetry |= rtd->codec_dais[i]->driver->symmetric_channels;
262
263 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
264 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
265 cpu_dai->channels, channels);
266 return -EINVAL;
267 }
268
269 symmetry = cpu_dai->driver->symmetric_samplebits ||
270 rtd->dai_link->symmetric_samplebits;
271
272 for (i = 0; i < rtd->num_codecs; i++)
273 symmetry |= rtd->codec_dais[i]->driver->symmetric_samplebits;
274
275 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
276 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
277 cpu_dai->sample_bits, sample_bits);
278 return -EINVAL;
279 }
280
281 return 0;
282 }
283
284 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
285 {
286 struct snd_soc_pcm_runtime *rtd = substream->private_data;
287 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
288 struct snd_soc_dai_link *link = rtd->dai_link;
289 unsigned int symmetry, i;
290
291 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
292 cpu_driver->symmetric_channels || link->symmetric_channels ||
293 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
294
295 for (i = 0; i < rtd->num_codecs; i++)
296 symmetry = symmetry ||
297 rtd->codec_dais[i]->driver->symmetric_rates ||
298 rtd->codec_dais[i]->driver->symmetric_channels ||
299 rtd->codec_dais[i]->driver->symmetric_samplebits;
300
301 return symmetry;
302 }
303
304 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
305 {
306 struct snd_soc_pcm_runtime *rtd = substream->private_data;
307 int ret;
308
309 if (!bits)
310 return;
311
312 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
313 if (ret != 0)
314 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
315 bits, ret);
316 }
317
318 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
319 {
320 struct snd_soc_pcm_runtime *rtd = substream->private_data;
321 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
322 struct snd_soc_dai *codec_dai;
323 int i;
324 unsigned int bits = 0, cpu_bits;
325
326 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
327 for (i = 0; i < rtd->num_codecs; i++) {
328 codec_dai = rtd->codec_dais[i];
329 if (codec_dai->driver->playback.sig_bits == 0) {
330 bits = 0;
331 break;
332 }
333 bits = max(codec_dai->driver->playback.sig_bits, bits);
334 }
335 cpu_bits = cpu_dai->driver->playback.sig_bits;
336 } else {
337 for (i = 0; i < rtd->num_codecs; i++) {
338 codec_dai = rtd->codec_dais[i];
339 if (codec_dai->driver->capture.sig_bits == 0) {
340 bits = 0;
341 break;
342 }
343 bits = max(codec_dai->driver->capture.sig_bits, bits);
344 }
345 cpu_bits = cpu_dai->driver->capture.sig_bits;
346 }
347
348 soc_pcm_set_msb(substream, bits);
349 soc_pcm_set_msb(substream, cpu_bits);
350 }
351
352 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
353 {
354 struct snd_pcm_runtime *runtime = substream->runtime;
355 struct snd_pcm_hardware *hw = &runtime->hw;
356 struct snd_soc_pcm_runtime *rtd = substream->private_data;
357 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
358 struct snd_soc_dai_driver *codec_dai_drv;
359 struct snd_soc_pcm_stream *codec_stream;
360 struct snd_soc_pcm_stream *cpu_stream;
361 unsigned int chan_min = 0, chan_max = UINT_MAX;
362 unsigned int rate_min = 0, rate_max = UINT_MAX;
363 unsigned int rates = UINT_MAX;
364 u64 formats = ULLONG_MAX;
365 int i;
366
367 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
368 cpu_stream = &cpu_dai_drv->playback;
369 else
370 cpu_stream = &cpu_dai_drv->capture;
371
372 /* first calculate min/max only for CODECs in the DAI link */
373 for (i = 0; i < rtd->num_codecs; i++) {
374 codec_dai_drv = rtd->codec_dais[i]->driver;
375 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
376 codec_stream = &codec_dai_drv->playback;
377 else
378 codec_stream = &codec_dai_drv->capture;
379 chan_min = max(chan_min, codec_stream->channels_min);
380 chan_max = min(chan_max, codec_stream->channels_max);
381 rate_min = max(rate_min, codec_stream->rate_min);
382 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
383 formats &= codec_stream->formats;
384 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
385 }
386
387 /*
388 * chan min/max cannot be enforced if there are multiple CODEC DAIs
389 * connected to a single CPU DAI, use CPU DAI's directly and let
390 * channel allocation be fixed up later
391 */
392 if (rtd->num_codecs > 1) {
393 chan_min = cpu_stream->channels_min;
394 chan_max = cpu_stream->channels_max;
395 }
396
397 hw->channels_min = max(chan_min, cpu_stream->channels_min);
398 hw->channels_max = min(chan_max, cpu_stream->channels_max);
399 if (hw->formats)
400 hw->formats &= formats & cpu_stream->formats;
401 else
402 hw->formats = formats & cpu_stream->formats;
403 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
404
405 snd_pcm_limit_hw_rates(runtime);
406
407 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
408 hw->rate_min = max(hw->rate_min, rate_min);
409 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
410 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
411 }
412
413 /*
414 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
415 * then initialized and any private data can be allocated. This also calls
416 * startup for the cpu DAI, platform, machine and codec DAI.
417 */
418 static int soc_pcm_open(struct snd_pcm_substream *substream)
419 {
420 struct snd_soc_pcm_runtime *rtd = substream->private_data;
421 struct snd_pcm_runtime *runtime = substream->runtime;
422 struct snd_soc_platform *platform = rtd->platform;
423 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
424 struct snd_soc_dai *codec_dai;
425 const char *codec_dai_name = "multicodec";
426 int i, ret = 0;
427
428 pinctrl_pm_select_default_state(cpu_dai->dev);
429 for (i = 0; i < rtd->num_codecs; i++)
430 pinctrl_pm_select_default_state(rtd->codec_dais[i]->dev);
431 pm_runtime_get_sync(cpu_dai->dev);
432 for (i = 0; i < rtd->num_codecs; i++)
433 pm_runtime_get_sync(rtd->codec_dais[i]->dev);
434 pm_runtime_get_sync(platform->dev);
435
436 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
437
438 /* startup the audio subsystem */
439 if (cpu_dai->driver->ops && cpu_dai->driver->ops->startup) {
440 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
441 if (ret < 0) {
442 dev_err(cpu_dai->dev, "ASoC: can't open interface"
443 " %s: %d\n", cpu_dai->name, ret);
444 goto out;
445 }
446 }
447
448 if (platform->driver->ops && platform->driver->ops->open) {
449 ret = platform->driver->ops->open(substream);
450 if (ret < 0) {
451 dev_err(platform->dev, "ASoC: can't open platform"
452 " %s: %d\n", platform->component.name, ret);
453 goto platform_err;
454 }
455 }
456
457 for (i = 0; i < rtd->num_codecs; i++) {
458 codec_dai = rtd->codec_dais[i];
459 if (codec_dai->driver->ops && codec_dai->driver->ops->startup) {
460 ret = codec_dai->driver->ops->startup(substream,
461 codec_dai);
462 if (ret < 0) {
463 dev_err(codec_dai->dev,
464 "ASoC: can't open codec %s: %d\n",
465 codec_dai->name, ret);
466 goto codec_dai_err;
467 }
468 }
469
470 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
471 codec_dai->tx_mask = 0;
472 else
473 codec_dai->rx_mask = 0;
474 }
475
476 if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
477 ret = rtd->dai_link->ops->startup(substream);
478 if (ret < 0) {
479 pr_err("ASoC: %s startup failed: %d\n",
480 rtd->dai_link->name, ret);
481 goto machine_err;
482 }
483 }
484
485 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
486 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
487 goto dynamic;
488
489 /* Check that the codec and cpu DAIs are compatible */
490 soc_pcm_init_runtime_hw(substream);
491
492 if (rtd->num_codecs == 1)
493 codec_dai_name = rtd->codec_dai->name;
494
495 if (soc_pcm_has_symmetry(substream))
496 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
497
498 ret = -EINVAL;
499 if (!runtime->hw.rates) {
500 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
501 codec_dai_name, cpu_dai->name);
502 goto config_err;
503 }
504 if (!runtime->hw.formats) {
505 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
506 codec_dai_name, cpu_dai->name);
507 goto config_err;
508 }
509 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
510 runtime->hw.channels_min > runtime->hw.channels_max) {
511 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
512 codec_dai_name, cpu_dai->name);
513 goto config_err;
514 }
515
516 soc_pcm_apply_msb(substream);
517
518 /* Symmetry only applies if we've already got an active stream. */
519 if (cpu_dai->active) {
520 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
521 if (ret != 0)
522 goto config_err;
523 }
524
525 for (i = 0; i < rtd->num_codecs; i++) {
526 if (rtd->codec_dais[i]->active) {
527 ret = soc_pcm_apply_symmetry(substream,
528 rtd->codec_dais[i]);
529 if (ret != 0)
530 goto config_err;
531 }
532 }
533
534 pr_debug("ASoC: %s <-> %s info:\n",
535 codec_dai_name, cpu_dai->name);
536 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
537 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
538 runtime->hw.channels_max);
539 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
540 runtime->hw.rate_max);
541
542 dynamic:
543
544 snd_soc_runtime_activate(rtd, substream->stream);
545
546 mutex_unlock(&rtd->pcm_mutex);
547 return 0;
548
549 config_err:
550 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
551 rtd->dai_link->ops->shutdown(substream);
552
553 machine_err:
554 i = rtd->num_codecs;
555
556 codec_dai_err:
557 while (--i >= 0) {
558 codec_dai = rtd->codec_dais[i];
559 if (codec_dai->driver->ops->shutdown)
560 codec_dai->driver->ops->shutdown(substream, codec_dai);
561 }
562
563 if (platform->driver->ops && platform->driver->ops->close)
564 platform->driver->ops->close(substream);
565
566 platform_err:
567 if (cpu_dai->driver->ops->shutdown)
568 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
569 out:
570 mutex_unlock(&rtd->pcm_mutex);
571
572 pm_runtime_put(platform->dev);
573 for (i = 0; i < rtd->num_codecs; i++)
574 pm_runtime_put(rtd->codec_dais[i]->dev);
575 pm_runtime_put(cpu_dai->dev);
576 for (i = 0; i < rtd->num_codecs; i++) {
577 if (!rtd->codec_dais[i]->active)
578 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
579 }
580 if (!cpu_dai->active)
581 pinctrl_pm_select_sleep_state(cpu_dai->dev);
582
583 return ret;
584 }
585
586 /*
587 * Power down the audio subsystem pmdown_time msecs after close is called.
588 * This is to ensure there are no pops or clicks in between any music tracks
589 * due to DAPM power cycling.
590 */
591 static void close_delayed_work(struct work_struct *work)
592 {
593 struct snd_soc_pcm_runtime *rtd =
594 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
595 struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
596
597 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
598
599 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
600 codec_dai->driver->playback.stream_name,
601 codec_dai->playback_active ? "active" : "inactive",
602 rtd->pop_wait ? "yes" : "no");
603
604 /* are we waiting on this codec DAI stream */
605 if (rtd->pop_wait == 1) {
606 rtd->pop_wait = 0;
607 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
608 SND_SOC_DAPM_STREAM_STOP);
609 }
610
611 mutex_unlock(&rtd->pcm_mutex);
612 }
613
614 /*
615 * Called by ALSA when a PCM substream is closed. Private data can be
616 * freed here. The cpu DAI, codec DAI, machine and platform are also
617 * shutdown.
618 */
619 static int soc_pcm_close(struct snd_pcm_substream *substream)
620 {
621 struct snd_soc_pcm_runtime *rtd = substream->private_data;
622 struct snd_soc_platform *platform = rtd->platform;
623 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
624 struct snd_soc_dai *codec_dai;
625 int i;
626
627 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
628
629 snd_soc_runtime_deactivate(rtd, substream->stream);
630
631 /* clear the corresponding DAIs rate when inactive */
632 if (!cpu_dai->active)
633 cpu_dai->rate = 0;
634
635 for (i = 0; i < rtd->num_codecs; i++) {
636 codec_dai = rtd->codec_dais[i];
637 if (!codec_dai->active)
638 codec_dai->rate = 0;
639 }
640
641 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
642
643 if (cpu_dai->driver->ops->shutdown)
644 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
645
646 for (i = 0; i < rtd->num_codecs; i++) {
647 codec_dai = rtd->codec_dais[i];
648 if (codec_dai->driver->ops->shutdown)
649 codec_dai->driver->ops->shutdown(substream, codec_dai);
650 }
651
652 if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
653 rtd->dai_link->ops->shutdown(substream);
654
655 if (platform->driver->ops && platform->driver->ops->close)
656 platform->driver->ops->close(substream);
657
658 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
659 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
660 /* powered down playback stream now */
661 snd_soc_dapm_stream_event(rtd,
662 SNDRV_PCM_STREAM_PLAYBACK,
663 SND_SOC_DAPM_STREAM_STOP);
664 } else {
665 /* start delayed pop wq here for playback streams */
666 rtd->pop_wait = 1;
667 queue_delayed_work(system_power_efficient_wq,
668 &rtd->delayed_work,
669 msecs_to_jiffies(rtd->pmdown_time));
670 }
671 } else {
672 /* capture streams can be powered down now */
673 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
674 SND_SOC_DAPM_STREAM_STOP);
675 }
676
677 mutex_unlock(&rtd->pcm_mutex);
678
679 pm_runtime_put(platform->dev);
680 for (i = 0; i < rtd->num_codecs; i++)
681 pm_runtime_put(rtd->codec_dais[i]->dev);
682 pm_runtime_put(cpu_dai->dev);
683 for (i = 0; i < rtd->num_codecs; i++) {
684 if (!rtd->codec_dais[i]->active)
685 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
686 }
687 if (!cpu_dai->active)
688 pinctrl_pm_select_sleep_state(cpu_dai->dev);
689
690 return 0;
691 }
692
693 /*
694 * Called by ALSA when the PCM substream is prepared, can set format, sample
695 * rate, etc. This function is non atomic and can be called multiple times,
696 * it can refer to the runtime info.
697 */
698 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
699 {
700 struct snd_soc_pcm_runtime *rtd = substream->private_data;
701 struct snd_soc_platform *platform = rtd->platform;
702 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
703 struct snd_soc_dai *codec_dai;
704 int i, ret = 0;
705
706 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
707
708 if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
709 ret = rtd->dai_link->ops->prepare(substream);
710 if (ret < 0) {
711 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
712 " %d\n", ret);
713 goto out;
714 }
715 }
716
717 if (platform->driver->ops && platform->driver->ops->prepare) {
718 ret = platform->driver->ops->prepare(substream);
719 if (ret < 0) {
720 dev_err(platform->dev, "ASoC: platform prepare error:"
721 " %d\n", ret);
722 goto out;
723 }
724 }
725
726 for (i = 0; i < rtd->num_codecs; i++) {
727 codec_dai = rtd->codec_dais[i];
728 if (codec_dai->driver->ops && codec_dai->driver->ops->prepare) {
729 ret = codec_dai->driver->ops->prepare(substream,
730 codec_dai);
731 if (ret < 0) {
732 dev_err(codec_dai->dev,
733 "ASoC: codec DAI prepare error: %d\n",
734 ret);
735 goto out;
736 }
737 }
738 }
739
740 if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) {
741 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
742 if (ret < 0) {
743 dev_err(cpu_dai->dev,
744 "ASoC: cpu DAI prepare error: %d\n", ret);
745 goto out;
746 }
747 }
748
749 /* cancel any delayed stream shutdown that is pending */
750 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
751 rtd->pop_wait) {
752 rtd->pop_wait = 0;
753 cancel_delayed_work(&rtd->delayed_work);
754 }
755
756 snd_soc_dapm_stream_event(rtd, substream->stream,
757 SND_SOC_DAPM_STREAM_START);
758
759 for (i = 0; i < rtd->num_codecs; i++)
760 snd_soc_dai_digital_mute(rtd->codec_dais[i], 0,
761 substream->stream);
762 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
763
764 out:
765 mutex_unlock(&rtd->pcm_mutex);
766 return ret;
767 }
768
769 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
770 unsigned int mask)
771 {
772 struct snd_interval *interval;
773 int channels = hweight_long(mask);
774
775 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
776 interval->min = channels;
777 interval->max = channels;
778 }
779
780 int soc_dai_hw_params(struct snd_pcm_substream *substream,
781 struct snd_pcm_hw_params *params,
782 struct snd_soc_dai *dai)
783 {
784 int ret;
785
786 if (dai->driver->ops && dai->driver->ops->hw_params) {
787 ret = dai->driver->ops->hw_params(substream, params, dai);
788 if (ret < 0) {
789 dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
790 dai->name, ret);
791 return ret;
792 }
793 }
794
795 return 0;
796 }
797
798 /*
799 * Called by ALSA when the hardware params are set by application. This
800 * function can also be called multiple times and can allocate buffers
801 * (using snd_pcm_lib_* ). It's non-atomic.
802 */
803 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
804 struct snd_pcm_hw_params *params)
805 {
806 struct snd_soc_pcm_runtime *rtd = substream->private_data;
807 struct snd_soc_platform *platform = rtd->platform;
808 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
809 int i, ret = 0;
810
811 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
812
813 ret = soc_pcm_params_symmetry(substream, params);
814 if (ret)
815 goto out;
816
817 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
818 ret = rtd->dai_link->ops->hw_params(substream, params);
819 if (ret < 0) {
820 dev_err(rtd->card->dev, "ASoC: machine hw_params"
821 " failed: %d\n", ret);
822 goto out;
823 }
824 }
825
826 for (i = 0; i < rtd->num_codecs; i++) {
827 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
828 struct snd_pcm_hw_params codec_params;
829
830 /* copy params for each codec */
831 codec_params = *params;
832
833 /* fixup params based on TDM slot masks */
834 if (codec_dai->tx_mask)
835 soc_pcm_codec_params_fixup(&codec_params,
836 codec_dai->tx_mask);
837 if (codec_dai->rx_mask)
838 soc_pcm_codec_params_fixup(&codec_params,
839 codec_dai->rx_mask);
840
841 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
842 if(ret < 0)
843 goto codec_err;
844
845 codec_dai->rate = params_rate(&codec_params);
846 codec_dai->channels = params_channels(&codec_params);
847 codec_dai->sample_bits = snd_pcm_format_physical_width(
848 params_format(&codec_params));
849 }
850
851 ret = soc_dai_hw_params(substream, params, cpu_dai);
852 if (ret < 0)
853 goto interface_err;
854
855 if (platform->driver->ops && platform->driver->ops->hw_params) {
856 ret = platform->driver->ops->hw_params(substream, params);
857 if (ret < 0) {
858 dev_err(platform->dev, "ASoC: %s hw params failed: %d\n",
859 platform->component.name, ret);
860 goto platform_err;
861 }
862 }
863
864 /* store the parameters for each DAIs */
865 cpu_dai->rate = params_rate(params);
866 cpu_dai->channels = params_channels(params);
867 cpu_dai->sample_bits =
868 snd_pcm_format_physical_width(params_format(params));
869
870 out:
871 mutex_unlock(&rtd->pcm_mutex);
872 return ret;
873
874 platform_err:
875 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
876 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
877
878 interface_err:
879 i = rtd->num_codecs;
880
881 codec_err:
882 while (--i >= 0) {
883 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
884 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
885 codec_dai->driver->ops->hw_free(substream, codec_dai);
886 codec_dai->rate = 0;
887 }
888
889 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
890 rtd->dai_link->ops->hw_free(substream);
891
892 mutex_unlock(&rtd->pcm_mutex);
893 return ret;
894 }
895
896 /*
897 * Frees resources allocated by hw_params, can be called multiple times
898 */
899 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
900 {
901 struct snd_soc_pcm_runtime *rtd = substream->private_data;
902 struct snd_soc_platform *platform = rtd->platform;
903 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
904 struct snd_soc_dai *codec_dai;
905 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
906 int i;
907
908 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
909
910 /* clear the corresponding DAIs parameters when going to be inactive */
911 if (cpu_dai->active == 1) {
912 cpu_dai->rate = 0;
913 cpu_dai->channels = 0;
914 cpu_dai->sample_bits = 0;
915 }
916
917 for (i = 0; i < rtd->num_codecs; i++) {
918 codec_dai = rtd->codec_dais[i];
919 if (codec_dai->active == 1) {
920 codec_dai->rate = 0;
921 codec_dai->channels = 0;
922 codec_dai->sample_bits = 0;
923 }
924 }
925
926 /* apply codec digital mute */
927 for (i = 0; i < rtd->num_codecs; i++) {
928 if ((playback && rtd->codec_dais[i]->playback_active == 1) ||
929 (!playback && rtd->codec_dais[i]->capture_active == 1))
930 snd_soc_dai_digital_mute(rtd->codec_dais[i], 1,
931 substream->stream);
932 }
933
934 /* free any machine hw params */
935 if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
936 rtd->dai_link->ops->hw_free(substream);
937
938 /* free any DMA resources */
939 if (platform->driver->ops && platform->driver->ops->hw_free)
940 platform->driver->ops->hw_free(substream);
941
942 /* now free hw params for the DAIs */
943 for (i = 0; i < rtd->num_codecs; i++) {
944 codec_dai = rtd->codec_dais[i];
945 if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free)
946 codec_dai->driver->ops->hw_free(substream, codec_dai);
947 }
948
949 if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free)
950 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
951
952 mutex_unlock(&rtd->pcm_mutex);
953 return 0;
954 }
955
956 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
957 {
958 struct snd_soc_pcm_runtime *rtd = substream->private_data;
959 struct snd_soc_platform *platform = rtd->platform;
960 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
961 struct snd_soc_dai *codec_dai;
962 int i, ret;
963
964 for (i = 0; i < rtd->num_codecs; i++) {
965 codec_dai = rtd->codec_dais[i];
966 if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) {
967 ret = codec_dai->driver->ops->trigger(substream,
968 cmd, codec_dai);
969 if (ret < 0)
970 return ret;
971 }
972 }
973
974 if (platform->driver->ops && platform->driver->ops->trigger) {
975 ret = platform->driver->ops->trigger(substream, cmd);
976 if (ret < 0)
977 return ret;
978 }
979
980 if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) {
981 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
982 if (ret < 0)
983 return ret;
984 }
985
986 if (rtd->dai_link->ops && rtd->dai_link->ops->trigger) {
987 ret = rtd->dai_link->ops->trigger(substream, cmd);
988 if (ret < 0)
989 return ret;
990 }
991
992 return 0;
993 }
994
995 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
996 int cmd)
997 {
998 struct snd_soc_pcm_runtime *rtd = substream->private_data;
999 struct snd_soc_platform *platform = rtd->platform;
1000 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1001 struct snd_soc_dai *codec_dai;
1002 int i, ret;
1003
1004 for (i = 0; i < rtd->num_codecs; i++) {
1005 codec_dai = rtd->codec_dais[i];
1006 if (codec_dai->driver->ops &&
1007 codec_dai->driver->ops->bespoke_trigger) {
1008 ret = codec_dai->driver->ops->bespoke_trigger(substream,
1009 cmd, codec_dai);
1010 if (ret < 0)
1011 return ret;
1012 }
1013 }
1014
1015 if (platform->driver->bespoke_trigger) {
1016 ret = platform->driver->bespoke_trigger(substream, cmd);
1017 if (ret < 0)
1018 return ret;
1019 }
1020
1021 if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) {
1022 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1023 if (ret < 0)
1024 return ret;
1025 }
1026 return 0;
1027 }
1028 /*
1029 * soc level wrapper for pointer callback
1030 * If cpu_dai, codec_dai, platform driver has the delay callback, than
1031 * the runtime->delay will be updated accordingly.
1032 */
1033 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1034 {
1035 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1036 struct snd_soc_platform *platform = rtd->platform;
1037 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1038 struct snd_soc_dai *codec_dai;
1039 struct snd_pcm_runtime *runtime = substream->runtime;
1040 snd_pcm_uframes_t offset = 0;
1041 snd_pcm_sframes_t delay = 0;
1042 snd_pcm_sframes_t codec_delay = 0;
1043 int i;
1044
1045 if (platform->driver->ops && platform->driver->ops->pointer)
1046 offset = platform->driver->ops->pointer(substream);
1047
1048 if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay)
1049 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1050
1051 for (i = 0; i < rtd->num_codecs; i++) {
1052 codec_dai = rtd->codec_dais[i];
1053 if (codec_dai->driver->ops && codec_dai->driver->ops->delay)
1054 codec_delay = max(codec_delay,
1055 codec_dai->driver->ops->delay(substream,
1056 codec_dai));
1057 }
1058 delay += codec_delay;
1059
1060 /*
1061 * None of the existing platform drivers implement delay(), so
1062 * for now the codec_dai of first multicodec entry is used
1063 */
1064 if (platform->driver->delay)
1065 delay += platform->driver->delay(substream, rtd->codec_dais[0]);
1066
1067 runtime->delay = delay;
1068
1069 return offset;
1070 }
1071
1072 /* connect a FE and BE */
1073 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1074 struct snd_soc_pcm_runtime *be, int stream)
1075 {
1076 struct snd_soc_dpcm *dpcm;
1077
1078 /* only add new dpcms */
1079 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1080 if (dpcm->be == be && dpcm->fe == fe)
1081 return 0;
1082 }
1083
1084 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1085 if (!dpcm)
1086 return -ENOMEM;
1087
1088 dpcm->be = be;
1089 dpcm->fe = fe;
1090 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1091 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1092 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1093 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1094
1095 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1096 stream ? "capture" : "playback", fe->dai_link->name,
1097 stream ? "<-" : "->", be->dai_link->name);
1098
1099 #ifdef CONFIG_DEBUG_FS
1100 if (fe->debugfs_dpcm_root)
1101 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1102 fe->debugfs_dpcm_root, &dpcm->state);
1103 #endif
1104 return 1;
1105 }
1106
1107 /* reparent a BE onto another FE */
1108 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1109 struct snd_soc_pcm_runtime *be, int stream)
1110 {
1111 struct snd_soc_dpcm *dpcm;
1112 struct snd_pcm_substream *fe_substream, *be_substream;
1113
1114 /* reparent if BE is connected to other FEs */
1115 if (!be->dpcm[stream].users)
1116 return;
1117
1118 be_substream = snd_soc_dpcm_get_substream(be, stream);
1119
1120 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
1121 if (dpcm->fe == fe)
1122 continue;
1123
1124 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1125 stream ? "capture" : "playback",
1126 dpcm->fe->dai_link->name,
1127 stream ? "<-" : "->", dpcm->be->dai_link->name);
1128
1129 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1130 be_substream->runtime = fe_substream->runtime;
1131 break;
1132 }
1133 }
1134
1135 /* disconnect a BE and FE */
1136 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1137 {
1138 struct snd_soc_dpcm *dpcm, *d;
1139
1140 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
1141 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1142 stream ? "capture" : "playback",
1143 dpcm->be->dai_link->name);
1144
1145 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1146 continue;
1147
1148 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1149 stream ? "capture" : "playback", fe->dai_link->name,
1150 stream ? "<-" : "->", dpcm->be->dai_link->name);
1151
1152 /* BEs still alive need new FE */
1153 dpcm_be_reparent(fe, dpcm->be, stream);
1154
1155 #ifdef CONFIG_DEBUG_FS
1156 debugfs_remove(dpcm->debugfs_state);
1157 #endif
1158 list_del(&dpcm->list_be);
1159 list_del(&dpcm->list_fe);
1160 kfree(dpcm);
1161 }
1162 }
1163
1164 /* get BE for DAI widget and stream */
1165 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1166 struct snd_soc_dapm_widget *widget, int stream)
1167 {
1168 struct snd_soc_pcm_runtime *be;
1169 int i, j;
1170
1171 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1172 for (i = 0; i < card->num_links; i++) {
1173 be = &card->rtd[i];
1174
1175 if (!be->dai_link->no_pcm)
1176 continue;
1177
1178 if (be->cpu_dai->playback_widget == widget)
1179 return be;
1180
1181 for (j = 0; j < be->num_codecs; j++) {
1182 struct snd_soc_dai *dai = be->codec_dais[j];
1183 if (dai->playback_widget == widget)
1184 return be;
1185 }
1186 }
1187 } else {
1188
1189 for (i = 0; i < card->num_links; i++) {
1190 be = &card->rtd[i];
1191
1192 if (!be->dai_link->no_pcm)
1193 continue;
1194
1195 if (be->cpu_dai->capture_widget == widget)
1196 return be;
1197
1198 for (j = 0; j < be->num_codecs; j++) {
1199 struct snd_soc_dai *dai = be->codec_dais[j];
1200 if (dai->capture_widget == widget)
1201 return be;
1202 }
1203 }
1204 }
1205
1206 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1207 stream ? "capture" : "playback", widget->name);
1208 return NULL;
1209 }
1210
1211 static inline struct snd_soc_dapm_widget *
1212 dai_get_widget(struct snd_soc_dai *dai, int stream)
1213 {
1214 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1215 return dai->playback_widget;
1216 else
1217 return dai->capture_widget;
1218 }
1219
1220 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1221 struct snd_soc_dapm_widget *widget)
1222 {
1223 int i;
1224
1225 for (i = 0; i < list->num_widgets; i++) {
1226 if (widget == list->widgets[i])
1227 return 1;
1228 }
1229
1230 return 0;
1231 }
1232
1233 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1234 int stream, struct snd_soc_dapm_widget_list **list_)
1235 {
1236 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1237 struct snd_soc_dapm_widget_list *list;
1238 int paths;
1239
1240 list = kzalloc(sizeof(struct snd_soc_dapm_widget_list) +
1241 sizeof(struct snd_soc_dapm_widget *), GFP_KERNEL);
1242 if (list == NULL)
1243 return -ENOMEM;
1244
1245 /* get number of valid DAI paths and their widgets */
1246 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, &list);
1247
1248 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1249 stream ? "capture" : "playback");
1250
1251 *list_ = list;
1252 return paths;
1253 }
1254
1255 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1256 struct snd_soc_dapm_widget_list **list_)
1257 {
1258 struct snd_soc_dpcm *dpcm;
1259 struct snd_soc_dapm_widget_list *list = *list_;
1260 struct snd_soc_dapm_widget *widget;
1261 int prune = 0;
1262
1263 /* Destroy any old FE <--> BE connections */
1264 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1265 unsigned int i;
1266
1267 /* is there a valid CPU DAI widget for this BE */
1268 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1269
1270 /* prune the BE if it's no longer in our active list */
1271 if (widget && widget_in_list(list, widget))
1272 continue;
1273
1274 /* is there a valid CODEC DAI widget for this BE */
1275 for (i = 0; i < dpcm->be->num_codecs; i++) {
1276 struct snd_soc_dai *dai = dpcm->be->codec_dais[i];
1277 widget = dai_get_widget(dai, stream);
1278
1279 /* prune the BE if it's no longer in our active list */
1280 if (widget && widget_in_list(list, widget))
1281 continue;
1282 }
1283
1284 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1285 stream ? "capture" : "playback",
1286 dpcm->be->dai_link->name, fe->dai_link->name);
1287 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1288 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1289 prune++;
1290 }
1291
1292 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1293 return prune;
1294 }
1295
1296 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1297 struct snd_soc_dapm_widget_list **list_)
1298 {
1299 struct snd_soc_card *card = fe->card;
1300 struct snd_soc_dapm_widget_list *list = *list_;
1301 struct snd_soc_pcm_runtime *be;
1302 int i, new = 0, err;
1303
1304 /* Create any new FE <--> BE connections */
1305 for (i = 0; i < list->num_widgets; i++) {
1306
1307 switch (list->widgets[i]->id) {
1308 case snd_soc_dapm_dai_in:
1309 case snd_soc_dapm_dai_out:
1310 break;
1311 default:
1312 continue;
1313 }
1314
1315 /* is there a valid BE rtd for this widget */
1316 be = dpcm_get_be(card, list->widgets[i], stream);
1317 if (!be) {
1318 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1319 list->widgets[i]->name);
1320 continue;
1321 }
1322
1323 /* make sure BE is a real BE */
1324 if (!be->dai_link->no_pcm)
1325 continue;
1326
1327 /* don't connect if FE is not running */
1328 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1329 continue;
1330
1331 /* newly connected FE and BE */
1332 err = dpcm_be_connect(fe, be, stream);
1333 if (err < 0) {
1334 dev_err(fe->dev, "ASoC: can't connect %s\n",
1335 list->widgets[i]->name);
1336 break;
1337 } else if (err == 0) /* already connected */
1338 continue;
1339
1340 /* new */
1341 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1342 new++;
1343 }
1344
1345 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1346 return new;
1347 }
1348
1349 /*
1350 * Find the corresponding BE DAIs that source or sink audio to this
1351 * FE substream.
1352 */
1353 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1354 int stream, struct snd_soc_dapm_widget_list **list, int new)
1355 {
1356 if (new)
1357 return dpcm_add_paths(fe, stream, list);
1358 else
1359 return dpcm_prune_paths(fe, stream, list);
1360 }
1361
1362 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1363 {
1364 struct snd_soc_dpcm *dpcm;
1365
1366 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1367 dpcm->be->dpcm[stream].runtime_update =
1368 SND_SOC_DPCM_UPDATE_NO;
1369 }
1370
1371 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1372 int stream)
1373 {
1374 struct snd_soc_dpcm *dpcm;
1375
1376 /* disable any enabled and non active backends */
1377 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1378
1379 struct snd_soc_pcm_runtime *be = dpcm->be;
1380 struct snd_pcm_substream *be_substream =
1381 snd_soc_dpcm_get_substream(be, stream);
1382
1383 if (be->dpcm[stream].users == 0)
1384 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1385 stream ? "capture" : "playback",
1386 be->dpcm[stream].state);
1387
1388 if (--be->dpcm[stream].users != 0)
1389 continue;
1390
1391 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1392 continue;
1393
1394 soc_pcm_close(be_substream);
1395 be_substream->runtime = NULL;
1396 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1397 }
1398 }
1399
1400 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1401 {
1402 struct snd_soc_dpcm *dpcm;
1403 int err, count = 0;
1404
1405 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1406 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1407
1408 struct snd_soc_pcm_runtime *be = dpcm->be;
1409 struct snd_pcm_substream *be_substream =
1410 snd_soc_dpcm_get_substream(be, stream);
1411
1412 if (!be_substream) {
1413 dev_err(be->dev, "ASoC: no backend %s stream\n",
1414 stream ? "capture" : "playback");
1415 continue;
1416 }
1417
1418 /* is this op for this BE ? */
1419 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1420 continue;
1421
1422 /* first time the dpcm is open ? */
1423 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1424 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1425 stream ? "capture" : "playback",
1426 be->dpcm[stream].state);
1427
1428 if (be->dpcm[stream].users++ != 0)
1429 continue;
1430
1431 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1432 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1433 continue;
1434
1435 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1436 stream ? "capture" : "playback", be->dai_link->name);
1437
1438 be_substream->runtime = be->dpcm[stream].runtime;
1439 err = soc_pcm_open(be_substream);
1440 if (err < 0) {
1441 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1442 be->dpcm[stream].users--;
1443 if (be->dpcm[stream].users < 0)
1444 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1445 stream ? "capture" : "playback",
1446 be->dpcm[stream].state);
1447
1448 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1449 goto unwind;
1450 }
1451
1452 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1453 count++;
1454 }
1455
1456 return count;
1457
1458 unwind:
1459 /* disable any enabled and non active backends */
1460 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1461 struct snd_soc_pcm_runtime *be = dpcm->be;
1462 struct snd_pcm_substream *be_substream =
1463 snd_soc_dpcm_get_substream(be, stream);
1464
1465 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1466 continue;
1467
1468 if (be->dpcm[stream].users == 0)
1469 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1470 stream ? "capture" : "playback",
1471 be->dpcm[stream].state);
1472
1473 if (--be->dpcm[stream].users != 0)
1474 continue;
1475
1476 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1477 continue;
1478
1479 soc_pcm_close(be_substream);
1480 be_substream->runtime = NULL;
1481 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1482 }
1483
1484 return err;
1485 }
1486
1487 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1488 struct snd_soc_pcm_stream *stream,
1489 u64 formats)
1490 {
1491 runtime->hw.rate_min = stream->rate_min;
1492 runtime->hw.rate_max = stream->rate_max;
1493 runtime->hw.channels_min = stream->channels_min;
1494 runtime->hw.channels_max = stream->channels_max;
1495 if (runtime->hw.formats)
1496 runtime->hw.formats &= formats & stream->formats;
1497 else
1498 runtime->hw.formats = formats & stream->formats;
1499 runtime->hw.rates = stream->rates;
1500 }
1501
1502 static u64 dpcm_runtime_base_format(struct snd_pcm_substream *substream)
1503 {
1504 struct snd_soc_pcm_runtime *fe = substream->private_data;
1505 struct snd_soc_dpcm *dpcm;
1506 u64 formats = ULLONG_MAX;
1507 int stream = substream->stream;
1508
1509 if (!fe->dai_link->dpcm_merged_format)
1510 return formats;
1511
1512 /*
1513 * It returns merged BE codec format
1514 * if FE want to use it (= dpcm_merged_format)
1515 */
1516
1517 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1518 struct snd_soc_pcm_runtime *be = dpcm->be;
1519 struct snd_soc_dai_driver *codec_dai_drv;
1520 struct snd_soc_pcm_stream *codec_stream;
1521 int i;
1522
1523 for (i = 0; i < be->num_codecs; i++) {
1524 codec_dai_drv = be->codec_dais[i]->driver;
1525 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1526 codec_stream = &codec_dai_drv->playback;
1527 else
1528 codec_stream = &codec_dai_drv->capture;
1529
1530 formats &= codec_stream->formats;
1531 }
1532 }
1533
1534 return formats;
1535 }
1536
1537 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1538 {
1539 struct snd_pcm_runtime *runtime = substream->runtime;
1540 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1541 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1542 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1543 u64 format = dpcm_runtime_base_format(substream);
1544
1545 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1546 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback, format);
1547 else
1548 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture, format);
1549 }
1550
1551 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1552
1553 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1554 * for avoiding the race with trigger callback.
1555 * If the state is unset and a trigger is pending while the previous operation,
1556 * process the pending trigger action here.
1557 */
1558 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1559 int stream, enum snd_soc_dpcm_update state)
1560 {
1561 struct snd_pcm_substream *substream =
1562 snd_soc_dpcm_get_substream(fe, stream);
1563
1564 snd_pcm_stream_lock_irq(substream);
1565 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1566 dpcm_fe_dai_do_trigger(substream,
1567 fe->dpcm[stream].trigger_pending - 1);
1568 fe->dpcm[stream].trigger_pending = 0;
1569 }
1570 fe->dpcm[stream].runtime_update = state;
1571 snd_pcm_stream_unlock_irq(substream);
1572 }
1573
1574 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1575 {
1576 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1577 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1578 int stream = fe_substream->stream, ret = 0;
1579
1580 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1581
1582 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1583 if (ret < 0) {
1584 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1585 goto be_err;
1586 }
1587
1588 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1589
1590 /* start the DAI frontend */
1591 ret = soc_pcm_open(fe_substream);
1592 if (ret < 0) {
1593 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1594 goto unwind;
1595 }
1596
1597 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1598
1599 dpcm_set_fe_runtime(fe_substream);
1600 snd_pcm_limit_hw_rates(runtime);
1601
1602 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1603 return 0;
1604
1605 unwind:
1606 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1607 be_err:
1608 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1609 return ret;
1610 }
1611
1612 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1613 {
1614 struct snd_soc_dpcm *dpcm;
1615
1616 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1617 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1618
1619 struct snd_soc_pcm_runtime *be = dpcm->be;
1620 struct snd_pcm_substream *be_substream =
1621 snd_soc_dpcm_get_substream(be, stream);
1622
1623 /* is this op for this BE ? */
1624 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1625 continue;
1626
1627 if (be->dpcm[stream].users == 0)
1628 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1629 stream ? "capture" : "playback",
1630 be->dpcm[stream].state);
1631
1632 if (--be->dpcm[stream].users != 0)
1633 continue;
1634
1635 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1636 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN))
1637 continue;
1638
1639 dev_dbg(be->dev, "ASoC: close BE %s\n",
1640 dpcm->fe->dai_link->name);
1641
1642 soc_pcm_close(be_substream);
1643 be_substream->runtime = NULL;
1644
1645 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1646 }
1647 return 0;
1648 }
1649
1650 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1651 {
1652 struct snd_soc_pcm_runtime *fe = substream->private_data;
1653 int stream = substream->stream;
1654
1655 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1656
1657 /* shutdown the BEs */
1658 dpcm_be_dai_shutdown(fe, substream->stream);
1659
1660 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1661
1662 /* now shutdown the frontend */
1663 soc_pcm_close(substream);
1664
1665 /* run the stream event for each BE */
1666 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1667
1668 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1669 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1670 return 0;
1671 }
1672
1673 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1674 {
1675 struct snd_soc_dpcm *dpcm;
1676
1677 /* only hw_params backends that are either sinks or sources
1678 * to this frontend DAI */
1679 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1680
1681 struct snd_soc_pcm_runtime *be = dpcm->be;
1682 struct snd_pcm_substream *be_substream =
1683 snd_soc_dpcm_get_substream(be, stream);
1684
1685 /* is this op for this BE ? */
1686 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1687 continue;
1688
1689 /* only free hw when no longer used - check all FEs */
1690 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1691 continue;
1692
1693 /* do not free hw if this BE is used by other FE */
1694 if (be->dpcm[stream].users > 1)
1695 continue;
1696
1697 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1698 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1699 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1700 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1701 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1702 continue;
1703
1704 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1705 dpcm->fe->dai_link->name);
1706
1707 soc_pcm_hw_free(be_substream);
1708
1709 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1710 }
1711
1712 return 0;
1713 }
1714
1715 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1716 {
1717 struct snd_soc_pcm_runtime *fe = substream->private_data;
1718 int err, stream = substream->stream;
1719
1720 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1721 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1722
1723 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1724
1725 /* call hw_free on the frontend */
1726 err = soc_pcm_hw_free(substream);
1727 if (err < 0)
1728 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
1729 fe->dai_link->name);
1730
1731 /* only hw_params backends that are either sinks or sources
1732 * to this frontend DAI */
1733 err = dpcm_be_dai_hw_free(fe, stream);
1734
1735 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1736 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1737
1738 mutex_unlock(&fe->card->mutex);
1739 return 0;
1740 }
1741
1742 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1743 {
1744 struct snd_soc_dpcm *dpcm;
1745 int ret;
1746
1747 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1748
1749 struct snd_soc_pcm_runtime *be = dpcm->be;
1750 struct snd_pcm_substream *be_substream =
1751 snd_soc_dpcm_get_substream(be, stream);
1752
1753 /* is this op for this BE ? */
1754 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1755 continue;
1756
1757 /* only allow hw_params() if no connected FEs are running */
1758 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
1759 continue;
1760
1761 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1762 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1763 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
1764 continue;
1765
1766 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
1767 dpcm->fe->dai_link->name);
1768
1769 /* copy params for each dpcm */
1770 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1771 sizeof(struct snd_pcm_hw_params));
1772
1773 /* perform any hw_params fixups */
1774 if (be->dai_link->be_hw_params_fixup) {
1775 ret = be->dai_link->be_hw_params_fixup(be,
1776 &dpcm->hw_params);
1777 if (ret < 0) {
1778 dev_err(be->dev,
1779 "ASoC: hw_params BE fixup failed %d\n",
1780 ret);
1781 goto unwind;
1782 }
1783 }
1784
1785 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
1786 if (ret < 0) {
1787 dev_err(dpcm->be->dev,
1788 "ASoC: hw_params BE failed %d\n", ret);
1789 goto unwind;
1790 }
1791
1792 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1793 }
1794 return 0;
1795
1796 unwind:
1797 /* disable any enabled and non active backends */
1798 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1799 struct snd_soc_pcm_runtime *be = dpcm->be;
1800 struct snd_pcm_substream *be_substream =
1801 snd_soc_dpcm_get_substream(be, stream);
1802
1803 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1804 continue;
1805
1806 /* only allow hw_free() if no connected FEs are running */
1807 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1808 continue;
1809
1810 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
1811 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1812 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1813 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1814 continue;
1815
1816 soc_pcm_hw_free(be_substream);
1817 }
1818
1819 return ret;
1820 }
1821
1822 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
1823 struct snd_pcm_hw_params *params)
1824 {
1825 struct snd_soc_pcm_runtime *fe = substream->private_data;
1826 int ret, stream = substream->stream;
1827
1828 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1829 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1830
1831 memcpy(&fe->dpcm[substream->stream].hw_params, params,
1832 sizeof(struct snd_pcm_hw_params));
1833 ret = dpcm_be_dai_hw_params(fe, substream->stream);
1834 if (ret < 0) {
1835 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
1836 goto out;
1837 }
1838
1839 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
1840 fe->dai_link->name, params_rate(params),
1841 params_channels(params), params_format(params));
1842
1843 /* call hw_params on the frontend */
1844 ret = soc_pcm_hw_params(substream, params);
1845 if (ret < 0) {
1846 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
1847 dpcm_be_dai_hw_free(fe, stream);
1848 } else
1849 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
1850
1851 out:
1852 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1853 mutex_unlock(&fe->card->mutex);
1854 return ret;
1855 }
1856
1857 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
1858 struct snd_pcm_substream *substream, int cmd)
1859 {
1860 int ret;
1861
1862 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
1863 dpcm->fe->dai_link->name, cmd);
1864
1865 ret = soc_pcm_trigger(substream, cmd);
1866 if (ret < 0)
1867 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
1868
1869 return ret;
1870 }
1871
1872 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
1873 int cmd)
1874 {
1875 struct snd_soc_dpcm *dpcm;
1876 int ret = 0;
1877
1878 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1879
1880 struct snd_soc_pcm_runtime *be = dpcm->be;
1881 struct snd_pcm_substream *be_substream =
1882 snd_soc_dpcm_get_substream(be, stream);
1883
1884 /* is this op for this BE ? */
1885 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1886 continue;
1887
1888 switch (cmd) {
1889 case SNDRV_PCM_TRIGGER_START:
1890 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1891 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
1892 continue;
1893
1894 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1895 if (ret)
1896 return ret;
1897
1898 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1899 break;
1900 case SNDRV_PCM_TRIGGER_RESUME:
1901 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
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_START;
1909 break;
1910 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1911 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
1912 continue;
1913
1914 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1915 if (ret)
1916 return ret;
1917
1918 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
1919 break;
1920 case SNDRV_PCM_TRIGGER_STOP:
1921 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1922 continue;
1923
1924 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1925 continue;
1926
1927 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1928 if (ret)
1929 return ret;
1930
1931 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
1932 break;
1933 case SNDRV_PCM_TRIGGER_SUSPEND:
1934 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1935 continue;
1936
1937 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1938 continue;
1939
1940 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1941 if (ret)
1942 return ret;
1943
1944 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
1945 break;
1946 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1947 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
1948 continue;
1949
1950 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1951 continue;
1952
1953 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
1954 if (ret)
1955 return ret;
1956
1957 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
1958 break;
1959 }
1960 }
1961
1962 return ret;
1963 }
1964 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
1965
1966 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
1967 {
1968 struct snd_soc_pcm_runtime *fe = substream->private_data;
1969 int stream = substream->stream, ret;
1970 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
1971
1972 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
1973
1974 switch (trigger) {
1975 case SND_SOC_DPCM_TRIGGER_PRE:
1976 /* call trigger on the frontend before the backend. */
1977
1978 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
1979 fe->dai_link->name, cmd);
1980
1981 ret = soc_pcm_trigger(substream, cmd);
1982 if (ret < 0) {
1983 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1984 goto out;
1985 }
1986
1987 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1988 break;
1989 case SND_SOC_DPCM_TRIGGER_POST:
1990 /* call trigger on the frontend after the backend. */
1991
1992 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
1993 if (ret < 0) {
1994 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
1995 goto out;
1996 }
1997
1998 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
1999 fe->dai_link->name, cmd);
2000
2001 ret = soc_pcm_trigger(substream, cmd);
2002 break;
2003 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2004 /* bespoke trigger() - handles both FE and BEs */
2005
2006 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2007 fe->dai_link->name, cmd);
2008
2009 ret = soc_pcm_bespoke_trigger(substream, cmd);
2010 if (ret < 0) {
2011 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2012 goto out;
2013 }
2014 break;
2015 default:
2016 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2017 fe->dai_link->name);
2018 ret = -EINVAL;
2019 goto out;
2020 }
2021
2022 switch (cmd) {
2023 case SNDRV_PCM_TRIGGER_START:
2024 case SNDRV_PCM_TRIGGER_RESUME:
2025 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2026 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2027 break;
2028 case SNDRV_PCM_TRIGGER_STOP:
2029 case SNDRV_PCM_TRIGGER_SUSPEND:
2030 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2031 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2032 break;
2033 }
2034
2035 out:
2036 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2037 return ret;
2038 }
2039
2040 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2041 {
2042 struct snd_soc_pcm_runtime *fe = substream->private_data;
2043 int stream = substream->stream;
2044
2045 /* if FE's runtime_update is already set, we're in race;
2046 * process this trigger later at exit
2047 */
2048 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2049 fe->dpcm[stream].trigger_pending = cmd + 1;
2050 return 0; /* delayed, assuming it's successful */
2051 }
2052
2053 /* we're alone, let's trigger */
2054 return dpcm_fe_dai_do_trigger(substream, cmd);
2055 }
2056
2057 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2058 {
2059 struct snd_soc_dpcm *dpcm;
2060 int ret = 0;
2061
2062 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2063
2064 struct snd_soc_pcm_runtime *be = dpcm->be;
2065 struct snd_pcm_substream *be_substream =
2066 snd_soc_dpcm_get_substream(be, stream);
2067
2068 /* is this op for this BE ? */
2069 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2070 continue;
2071
2072 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2073 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2074 continue;
2075
2076 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2077 dpcm->fe->dai_link->name);
2078
2079 ret = soc_pcm_prepare(be_substream);
2080 if (ret < 0) {
2081 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2082 ret);
2083 break;
2084 }
2085
2086 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2087 }
2088 return ret;
2089 }
2090
2091 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2092 {
2093 struct snd_soc_pcm_runtime *fe = substream->private_data;
2094 int stream = substream->stream, ret = 0;
2095
2096 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2097
2098 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2099
2100 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2101
2102 /* there is no point preparing this FE if there are no BEs */
2103 if (list_empty(&fe->dpcm[stream].be_clients)) {
2104 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2105 fe->dai_link->name);
2106 ret = -EINVAL;
2107 goto out;
2108 }
2109
2110 ret = dpcm_be_dai_prepare(fe, substream->stream);
2111 if (ret < 0)
2112 goto out;
2113
2114 /* call prepare on the frontend */
2115 ret = soc_pcm_prepare(substream);
2116 if (ret < 0) {
2117 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2118 fe->dai_link->name);
2119 goto out;
2120 }
2121
2122 /* run the stream event for each BE */
2123 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2124 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2125
2126 out:
2127 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2128 mutex_unlock(&fe->card->mutex);
2129
2130 return ret;
2131 }
2132
2133 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2134 unsigned int cmd, void *arg)
2135 {
2136 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2137 struct snd_soc_platform *platform = rtd->platform;
2138
2139 if (platform->driver->ops && platform->driver->ops->ioctl)
2140 return platform->driver->ops->ioctl(substream, cmd, arg);
2141 return snd_pcm_lib_ioctl(substream, cmd, arg);
2142 }
2143
2144 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2145 {
2146 struct snd_pcm_substream *substream =
2147 snd_soc_dpcm_get_substream(fe, stream);
2148 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2149 int err;
2150
2151 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2152 stream ? "capture" : "playback", fe->dai_link->name);
2153
2154 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2155 /* call bespoke trigger - FE takes care of all BE triggers */
2156 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2157 fe->dai_link->name);
2158
2159 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2160 if (err < 0)
2161 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2162 } else {
2163 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2164 fe->dai_link->name);
2165
2166 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2167 if (err < 0)
2168 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2169 }
2170
2171 err = dpcm_be_dai_hw_free(fe, stream);
2172 if (err < 0)
2173 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2174
2175 err = dpcm_be_dai_shutdown(fe, stream);
2176 if (err < 0)
2177 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2178
2179 /* run the stream event for each BE */
2180 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2181
2182 return 0;
2183 }
2184
2185 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2186 {
2187 struct snd_pcm_substream *substream =
2188 snd_soc_dpcm_get_substream(fe, stream);
2189 struct snd_soc_dpcm *dpcm;
2190 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2191 int ret;
2192
2193 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2194 stream ? "capture" : "playback", fe->dai_link->name);
2195
2196 /* Only start the BE if the FE is ready */
2197 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2198 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2199 return -EINVAL;
2200
2201 /* startup must always be called for new BEs */
2202 ret = dpcm_be_dai_startup(fe, stream);
2203 if (ret < 0)
2204 goto disconnect;
2205
2206 /* keep going if FE state is > open */
2207 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2208 return 0;
2209
2210 ret = dpcm_be_dai_hw_params(fe, stream);
2211 if (ret < 0)
2212 goto close;
2213
2214 /* keep going if FE state is > hw_params */
2215 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2216 return 0;
2217
2218
2219 ret = dpcm_be_dai_prepare(fe, stream);
2220 if (ret < 0)
2221 goto hw_free;
2222
2223 /* run the stream event for each BE */
2224 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2225
2226 /* keep going if FE state is > prepare */
2227 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2228 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2229 return 0;
2230
2231 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2232 /* call trigger on the frontend - FE takes care of all BE triggers */
2233 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2234 fe->dai_link->name);
2235
2236 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2237 if (ret < 0) {
2238 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2239 goto hw_free;
2240 }
2241 } else {
2242 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2243 fe->dai_link->name);
2244
2245 ret = dpcm_be_dai_trigger(fe, stream,
2246 SNDRV_PCM_TRIGGER_START);
2247 if (ret < 0) {
2248 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2249 goto hw_free;
2250 }
2251 }
2252
2253 return 0;
2254
2255 hw_free:
2256 dpcm_be_dai_hw_free(fe, stream);
2257 close:
2258 dpcm_be_dai_shutdown(fe, stream);
2259 disconnect:
2260 /* disconnect any non started BEs */
2261 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2262 struct snd_soc_pcm_runtime *be = dpcm->be;
2263 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2264 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2265 }
2266
2267 return ret;
2268 }
2269
2270 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2271 {
2272 int ret;
2273
2274 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2275 ret = dpcm_run_update_startup(fe, stream);
2276 if (ret < 0)
2277 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2278 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2279
2280 return ret;
2281 }
2282
2283 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2284 {
2285 int ret;
2286
2287 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2288 ret = dpcm_run_update_shutdown(fe, stream);
2289 if (ret < 0)
2290 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2291 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2292
2293 return ret;
2294 }
2295
2296 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2297 * any DAI links.
2298 */
2299 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2300 {
2301 int i, old, new, paths;
2302
2303 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2304 for (i = 0; i < card->num_rtd; i++) {
2305 struct snd_soc_dapm_widget_list *list;
2306 struct snd_soc_pcm_runtime *fe = &card->rtd[i];
2307
2308 /* make sure link is FE */
2309 if (!fe->dai_link->dynamic)
2310 continue;
2311
2312 /* only check active links */
2313 if (!fe->cpu_dai->active)
2314 continue;
2315
2316 /* DAPM sync will call this to update DSP paths */
2317 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
2318 fe->dai_link->name);
2319
2320 /* skip if FE doesn't have playback capability */
2321 if (!fe->cpu_dai->driver->playback.channels_min
2322 || !fe->codec_dai->driver->playback.channels_min)
2323 goto capture;
2324
2325 /* skip if FE isn't currently playing */
2326 if (!fe->cpu_dai->playback_active
2327 || !fe->codec_dai->playback_active)
2328 goto capture;
2329
2330 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2331 if (paths < 0) {
2332 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2333 fe->dai_link->name, "playback");
2334 mutex_unlock(&card->mutex);
2335 return paths;
2336 }
2337
2338 /* update any new playback paths */
2339 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
2340 if (new) {
2341 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2342 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2343 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2344 }
2345
2346 /* update any old playback paths */
2347 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
2348 if (old) {
2349 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2350 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2351 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2352 }
2353
2354 dpcm_path_put(&list);
2355 capture:
2356 /* skip if FE doesn't have capture capability */
2357 if (!fe->cpu_dai->driver->capture.channels_min
2358 || !fe->codec_dai->driver->capture.channels_min)
2359 continue;
2360
2361 /* skip if FE isn't currently capturing */
2362 if (!fe->cpu_dai->capture_active
2363 || !fe->codec_dai->capture_active)
2364 continue;
2365
2366 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2367 if (paths < 0) {
2368 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2369 fe->dai_link->name, "capture");
2370 mutex_unlock(&card->mutex);
2371 return paths;
2372 }
2373
2374 /* update any new capture paths */
2375 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
2376 if (new) {
2377 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2378 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2379 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2380 }
2381
2382 /* update any old capture paths */
2383 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
2384 if (old) {
2385 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2386 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2387 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2388 }
2389
2390 dpcm_path_put(&list);
2391 }
2392
2393 mutex_unlock(&card->mutex);
2394 return 0;
2395 }
2396 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2397 {
2398 struct snd_soc_dpcm *dpcm;
2399 struct list_head *clients =
2400 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
2401
2402 list_for_each_entry(dpcm, clients, list_be) {
2403
2404 struct snd_soc_pcm_runtime *be = dpcm->be;
2405 int i;
2406
2407 if (be->dai_link->ignore_suspend)
2408 continue;
2409
2410 for (i = 0; i < be->num_codecs; i++) {
2411 struct snd_soc_dai *dai = be->codec_dais[i];
2412 struct snd_soc_dai_driver *drv = dai->driver;
2413
2414 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2415 be->dai_link->name);
2416
2417 if (drv->ops && drv->ops->digital_mute &&
2418 dai->playback_active)
2419 drv->ops->digital_mute(dai, mute);
2420 }
2421 }
2422
2423 return 0;
2424 }
2425
2426 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2427 {
2428 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2429 struct snd_soc_dpcm *dpcm;
2430 struct snd_soc_dapm_widget_list *list;
2431 int ret;
2432 int stream = fe_substream->stream;
2433
2434 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2435 fe->dpcm[stream].runtime = fe_substream->runtime;
2436
2437 ret = dpcm_path_get(fe, stream, &list);
2438 if (ret < 0) {
2439 mutex_unlock(&fe->card->mutex);
2440 return ret;
2441 } else if (ret == 0) {
2442 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2443 fe->dai_link->name, stream ? "capture" : "playback");
2444 }
2445
2446 /* calculate valid and active FE <-> BE dpcms */
2447 dpcm_process_paths(fe, stream, &list, 1);
2448
2449 ret = dpcm_fe_dai_startup(fe_substream);
2450 if (ret < 0) {
2451 /* clean up all links */
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 fe->dpcm[stream].runtime = NULL;
2457 }
2458
2459 dpcm_clear_pending_state(fe, stream);
2460 dpcm_path_put(&list);
2461 mutex_unlock(&fe->card->mutex);
2462 return ret;
2463 }
2464
2465 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2466 {
2467 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2468 struct snd_soc_dpcm *dpcm;
2469 int stream = fe_substream->stream, ret;
2470
2471 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2472 ret = dpcm_fe_dai_shutdown(fe_substream);
2473
2474 /* mark FE's links ready to prune */
2475 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2476 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2477
2478 dpcm_be_disconnect(fe, stream);
2479
2480 fe->dpcm[stream].runtime = NULL;
2481 mutex_unlock(&fe->card->mutex);
2482 return ret;
2483 }
2484
2485 /* create a new pcm */
2486 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2487 {
2488 struct snd_soc_platform *platform = rtd->platform;
2489 struct snd_soc_dai *codec_dai;
2490 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2491 struct snd_pcm *pcm;
2492 char new_name[64];
2493 int ret = 0, playback = 0, capture = 0;
2494 int i;
2495
2496 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2497 playback = rtd->dai_link->dpcm_playback;
2498 capture = rtd->dai_link->dpcm_capture;
2499 } else {
2500 for (i = 0; i < rtd->num_codecs; i++) {
2501 codec_dai = rtd->codec_dais[i];
2502 if (codec_dai->driver->playback.channels_min)
2503 playback = 1;
2504 if (codec_dai->driver->capture.channels_min)
2505 capture = 1;
2506 }
2507
2508 capture = capture && cpu_dai->driver->capture.channels_min;
2509 playback = playback && cpu_dai->driver->playback.channels_min;
2510 }
2511
2512 if (rtd->dai_link->playback_only) {
2513 playback = 1;
2514 capture = 0;
2515 }
2516
2517 if (rtd->dai_link->capture_only) {
2518 playback = 0;
2519 capture = 1;
2520 }
2521
2522 /* create the PCM */
2523 if (rtd->dai_link->no_pcm) {
2524 snprintf(new_name, sizeof(new_name), "(%s)",
2525 rtd->dai_link->stream_name);
2526
2527 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2528 playback, capture, &pcm);
2529 } else {
2530 if (rtd->dai_link->dynamic)
2531 snprintf(new_name, sizeof(new_name), "%s (*)",
2532 rtd->dai_link->stream_name);
2533 else
2534 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2535 rtd->dai_link->stream_name,
2536 (rtd->num_codecs > 1) ?
2537 "multicodec" : rtd->codec_dai->name, num);
2538
2539 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2540 capture, &pcm);
2541 }
2542 if (ret < 0) {
2543 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2544 rtd->dai_link->name);
2545 return ret;
2546 }
2547 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2548
2549 /* DAPM dai link stream work */
2550 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2551
2552 pcm->nonatomic = rtd->dai_link->nonatomic;
2553 rtd->pcm = pcm;
2554 pcm->private_data = rtd;
2555
2556 if (rtd->dai_link->no_pcm) {
2557 if (playback)
2558 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2559 if (capture)
2560 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2561 goto out;
2562 }
2563
2564 /* ASoC PCM operations */
2565 if (rtd->dai_link->dynamic) {
2566 rtd->ops.open = dpcm_fe_dai_open;
2567 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2568 rtd->ops.prepare = dpcm_fe_dai_prepare;
2569 rtd->ops.trigger = dpcm_fe_dai_trigger;
2570 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2571 rtd->ops.close = dpcm_fe_dai_close;
2572 rtd->ops.pointer = soc_pcm_pointer;
2573 rtd->ops.ioctl = soc_pcm_ioctl;
2574 } else {
2575 rtd->ops.open = soc_pcm_open;
2576 rtd->ops.hw_params = soc_pcm_hw_params;
2577 rtd->ops.prepare = soc_pcm_prepare;
2578 rtd->ops.trigger = soc_pcm_trigger;
2579 rtd->ops.hw_free = soc_pcm_hw_free;
2580 rtd->ops.close = soc_pcm_close;
2581 rtd->ops.pointer = soc_pcm_pointer;
2582 rtd->ops.ioctl = soc_pcm_ioctl;
2583 }
2584
2585 if (platform->driver->ops) {
2586 rtd->ops.ack = platform->driver->ops->ack;
2587 rtd->ops.copy = platform->driver->ops->copy;
2588 rtd->ops.silence = platform->driver->ops->silence;
2589 rtd->ops.page = platform->driver->ops->page;
2590 rtd->ops.mmap = platform->driver->ops->mmap;
2591 }
2592
2593 if (playback)
2594 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
2595
2596 if (capture)
2597 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
2598
2599 if (platform->driver->pcm_new) {
2600 ret = platform->driver->pcm_new(rtd);
2601 if (ret < 0) {
2602 dev_err(platform->dev,
2603 "ASoC: pcm constructor failed: %d\n",
2604 ret);
2605 return ret;
2606 }
2607 }
2608
2609 pcm->private_free = platform->driver->pcm_free;
2610 out:
2611 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
2612 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
2613 cpu_dai->name);
2614 return ret;
2615 }
2616
2617 /* is the current PCM operation for this FE ? */
2618 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
2619 {
2620 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
2621 return 1;
2622 return 0;
2623 }
2624 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
2625
2626 /* is the current PCM operation for this BE ? */
2627 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
2628 struct snd_soc_pcm_runtime *be, int stream)
2629 {
2630 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
2631 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
2632 be->dpcm[stream].runtime_update))
2633 return 1;
2634 return 0;
2635 }
2636 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
2637
2638 /* get the substream for this BE */
2639 struct snd_pcm_substream *
2640 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
2641 {
2642 return be->pcm->streams[stream].substream;
2643 }
2644 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
2645
2646 /* get the BE runtime state */
2647 enum snd_soc_dpcm_state
2648 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
2649 {
2650 return be->dpcm[stream].state;
2651 }
2652 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
2653
2654 /* set the BE runtime state */
2655 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
2656 int stream, enum snd_soc_dpcm_state state)
2657 {
2658 be->dpcm[stream].state = state;
2659 }
2660 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
2661
2662 /*
2663 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
2664 * are not running, paused or suspended for the specified stream direction.
2665 */
2666 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
2667 struct snd_soc_pcm_runtime *be, int stream)
2668 {
2669 struct snd_soc_dpcm *dpcm;
2670 int state;
2671
2672 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2673
2674 if (dpcm->fe == fe)
2675 continue;
2676
2677 state = dpcm->fe->dpcm[stream].state;
2678 if (state == SND_SOC_DPCM_STATE_START ||
2679 state == SND_SOC_DPCM_STATE_PAUSED ||
2680 state == SND_SOC_DPCM_STATE_SUSPEND)
2681 return 0;
2682 }
2683
2684 /* it's safe to free/stop this BE DAI */
2685 return 1;
2686 }
2687 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
2688
2689 /*
2690 * We can only change hw params a BE DAI if any of it's FE are not prepared,
2691 * running, paused or suspended for the specified stream direction.
2692 */
2693 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
2694 struct snd_soc_pcm_runtime *be, int stream)
2695 {
2696 struct snd_soc_dpcm *dpcm;
2697 int state;
2698
2699 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
2700
2701 if (dpcm->fe == fe)
2702 continue;
2703
2704 state = dpcm->fe->dpcm[stream].state;
2705 if (state == SND_SOC_DPCM_STATE_START ||
2706 state == SND_SOC_DPCM_STATE_PAUSED ||
2707 state == SND_SOC_DPCM_STATE_SUSPEND ||
2708 state == SND_SOC_DPCM_STATE_PREPARE)
2709 return 0;
2710 }
2711
2712 /* it's safe to change hw_params */
2713 return 1;
2714 }
2715 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
2716
2717 int snd_soc_platform_trigger(struct snd_pcm_substream *substream,
2718 int cmd, struct snd_soc_platform *platform)
2719 {
2720 if (platform->driver->ops && platform->driver->ops->trigger)
2721 return platform->driver->ops->trigger(substream, cmd);
2722 return 0;
2723 }
2724 EXPORT_SYMBOL_GPL(snd_soc_platform_trigger);
2725
2726 #ifdef CONFIG_DEBUG_FS
2727 static char *dpcm_state_string(enum snd_soc_dpcm_state state)
2728 {
2729 switch (state) {
2730 case SND_SOC_DPCM_STATE_NEW:
2731 return "new";
2732 case SND_SOC_DPCM_STATE_OPEN:
2733 return "open";
2734 case SND_SOC_DPCM_STATE_HW_PARAMS:
2735 return "hw_params";
2736 case SND_SOC_DPCM_STATE_PREPARE:
2737 return "prepare";
2738 case SND_SOC_DPCM_STATE_START:
2739 return "start";
2740 case SND_SOC_DPCM_STATE_STOP:
2741 return "stop";
2742 case SND_SOC_DPCM_STATE_SUSPEND:
2743 return "suspend";
2744 case SND_SOC_DPCM_STATE_PAUSED:
2745 return "paused";
2746 case SND_SOC_DPCM_STATE_HW_FREE:
2747 return "hw_free";
2748 case SND_SOC_DPCM_STATE_CLOSE:
2749 return "close";
2750 }
2751
2752 return "unknown";
2753 }
2754
2755 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
2756 int stream, char *buf, size_t size)
2757 {
2758 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
2759 struct snd_soc_dpcm *dpcm;
2760 ssize_t offset = 0;
2761
2762 /* FE state */
2763 offset += snprintf(buf + offset, size - offset,
2764 "[%s - %s]\n", fe->dai_link->name,
2765 stream ? "Capture" : "Playback");
2766
2767 offset += snprintf(buf + offset, size - offset, "State: %s\n",
2768 dpcm_state_string(fe->dpcm[stream].state));
2769
2770 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2771 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2772 offset += snprintf(buf + offset, size - offset,
2773 "Hardware Params: "
2774 "Format = %s, Channels = %d, Rate = %d\n",
2775 snd_pcm_format_name(params_format(params)),
2776 params_channels(params),
2777 params_rate(params));
2778
2779 /* BEs state */
2780 offset += snprintf(buf + offset, size - offset, "Backends:\n");
2781
2782 if (list_empty(&fe->dpcm[stream].be_clients)) {
2783 offset += snprintf(buf + offset, size - offset,
2784 " No active DSP links\n");
2785 goto out;
2786 }
2787
2788 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2789 struct snd_soc_pcm_runtime *be = dpcm->be;
2790 params = &dpcm->hw_params;
2791
2792 offset += snprintf(buf + offset, size - offset,
2793 "- %s\n", be->dai_link->name);
2794
2795 offset += snprintf(buf + offset, size - offset,
2796 " State: %s\n",
2797 dpcm_state_string(be->dpcm[stream].state));
2798
2799 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
2800 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
2801 offset += snprintf(buf + offset, size - offset,
2802 " Hardware Params: "
2803 "Format = %s, Channels = %d, Rate = %d\n",
2804 snd_pcm_format_name(params_format(params)),
2805 params_channels(params),
2806 params_rate(params));
2807 }
2808
2809 out:
2810 return offset;
2811 }
2812
2813 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
2814 size_t count, loff_t *ppos)
2815 {
2816 struct snd_soc_pcm_runtime *fe = file->private_data;
2817 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
2818 char *buf;
2819
2820 buf = kmalloc(out_count, GFP_KERNEL);
2821 if (!buf)
2822 return -ENOMEM;
2823
2824 if (fe->cpu_dai->driver->playback.channels_min)
2825 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
2826 buf + offset, out_count - offset);
2827
2828 if (fe->cpu_dai->driver->capture.channels_min)
2829 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
2830 buf + offset, out_count - offset);
2831
2832 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
2833
2834 kfree(buf);
2835 return ret;
2836 }
2837
2838 static const struct file_operations dpcm_state_fops = {
2839 .open = simple_open,
2840 .read = dpcm_state_read_file,
2841 .llseek = default_llseek,
2842 };
2843
2844 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
2845 {
2846 if (!rtd->dai_link)
2847 return;
2848
2849 if (!rtd->card->debugfs_card_root)
2850 return;
2851
2852 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
2853 rtd->card->debugfs_card_root);
2854 if (!rtd->debugfs_dpcm_root) {
2855 dev_dbg(rtd->dev,
2856 "ASoC: Failed to create dpcm debugfs directory %s\n",
2857 rtd->dai_link->name);
2858 return;
2859 }
2860
2861 rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444,
2862 rtd->debugfs_dpcm_root,
2863 rtd, &dpcm_state_fops);
2864 }
2865 #endif
Linux kernel stable tree