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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / sound / soc / soc-pcm.c
blobff1b7c7078e5f1d01db793fbe6484476eeb60cf9
1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // soc-pcm.c -- ALSA SoC PCM
4 //
5 // Copyright 2005 Wolfson Microelectronics PLC.
6 // Copyright 2005 Openedhand Ltd.
7 // Copyright (C) 2010 Slimlogic Ltd.
8 // Copyright (C) 2010 Texas Instruments Inc.
9 //
10 // Authors: Liam Girdwood <lrg@ti.com>
11 // Mark Brown <broonie@opensource.wolfsonmicro.com>
12
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/delay.h>
16 #include <linux/pinctrl/consumer.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/slab.h>
19 #include <linux/workqueue.h>
20 #include <linux/export.h>
21 #include <linux/debugfs.h>
22 #include <sound/core.h>
23 #include <sound/pcm.h>
24 #include <sound/pcm_params.h>
25 #include <sound/soc.h>
26 #include <sound/soc-dpcm.h>
27 #include <sound/initval.h>
28
29 #define DPCM_MAX_BE_USERS 8
30
31 static int soc_rtd_startup(struct snd_soc_pcm_runtime *rtd,
32 struct snd_pcm_substream *substream)
33 {
34 if (rtd->dai_link->ops &&
35 rtd->dai_link->ops->startup)
36 return rtd->dai_link->ops->startup(substream);
37 return 0;
38 }
39
40 static void soc_rtd_shutdown(struct snd_soc_pcm_runtime *rtd,
41 struct snd_pcm_substream *substream)
42 {
43 if (rtd->dai_link->ops &&
44 rtd->dai_link->ops->shutdown)
45 rtd->dai_link->ops->shutdown(substream);
46 }
47
48 static int soc_rtd_prepare(struct snd_soc_pcm_runtime *rtd,
49 struct snd_pcm_substream *substream)
50 {
51 if (rtd->dai_link->ops &&
52 rtd->dai_link->ops->prepare)
53 return rtd->dai_link->ops->prepare(substream);
54 return 0;
55 }
56
57 static int soc_rtd_hw_params(struct snd_soc_pcm_runtime *rtd,
58 struct snd_pcm_substream *substream,
59 struct snd_pcm_hw_params *params)
60 {
61 if (rtd->dai_link->ops &&
62 rtd->dai_link->ops->hw_params)
63 return rtd->dai_link->ops->hw_params(substream, params);
64 return 0;
65 }
66
67 static void soc_rtd_hw_free(struct snd_soc_pcm_runtime *rtd,
68 struct snd_pcm_substream *substream)
69 {
70 if (rtd->dai_link->ops &&
71 rtd->dai_link->ops->hw_free)
72 rtd->dai_link->ops->hw_free(substream);
73 }
74
75 static int soc_rtd_trigger(struct snd_soc_pcm_runtime *rtd,
76 struct snd_pcm_substream *substream,
77 int cmd)
78 {
79 if (rtd->dai_link->ops &&
80 rtd->dai_link->ops->trigger)
81 return rtd->dai_link->ops->trigger(substream, cmd);
82 return 0;
83 }
84
85 /**
86 * snd_soc_runtime_activate() - Increment active count for PCM runtime components
87 * @rtd: ASoC PCM runtime that is activated
88 * @stream: Direction of the PCM stream
89 *
90 * Increments the active count for all the DAIs and components attached to a PCM
91 * runtime. Should typically be called when a stream is opened.
92 *
93 * Must be called with the rtd->card->pcm_mutex being held
94 */
95 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
96 {
97 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
98 struct snd_soc_dai *codec_dai;
99 int i;
100
101 lockdep_assert_held(&rtd->card->pcm_mutex);
102
103 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
104 cpu_dai->playback_active++;
105 for_each_rtd_codec_dai(rtd, i, codec_dai)
106 codec_dai->playback_active++;
107 } else {
108 cpu_dai->capture_active++;
109 for_each_rtd_codec_dai(rtd, i, codec_dai)
110 codec_dai->capture_active++;
111 }
112
113 cpu_dai->active++;
114 cpu_dai->component->active++;
115 for_each_rtd_codec_dai(rtd, i, codec_dai) {
116 codec_dai->active++;
117 codec_dai->component->active++;
118 }
119 }
120
121 /**
122 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
123 * @rtd: ASoC PCM runtime that is deactivated
124 * @stream: Direction of the PCM stream
125 *
126 * Decrements the active count for all the DAIs and components attached to a PCM
127 * runtime. Should typically be called when a stream is closed.
128 *
129 * Must be called with the rtd->card->pcm_mutex being held
130 */
131 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
132 {
133 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
134 struct snd_soc_dai *codec_dai;
135 int i;
136
137 lockdep_assert_held(&rtd->card->pcm_mutex);
138
139 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
140 cpu_dai->playback_active--;
141 for_each_rtd_codec_dai(rtd, i, codec_dai)
142 codec_dai->playback_active--;
143 } else {
144 cpu_dai->capture_active--;
145 for_each_rtd_codec_dai(rtd, i, codec_dai)
146 codec_dai->capture_active--;
147 }
148
149 cpu_dai->active--;
150 cpu_dai->component->active--;
151 for_each_rtd_codec_dai(rtd, i, codec_dai) {
152 codec_dai->component->active--;
153 codec_dai->active--;
154 }
155 }
156
157 /**
158 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
159 * @rtd: The ASoC PCM runtime that should be checked.
160 *
161 * This function checks whether the power down delay should be ignored for a
162 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
163 * been configured to ignore the delay, or if none of the components benefits
164 * from having the delay.
165 */
166 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
167 {
168 struct snd_soc_component *component;
169 bool ignore = true;
170 int i;
171
172 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
173 return true;
174
175 for_each_rtd_components(rtd, i, component)
176 ignore &= !component->driver->use_pmdown_time;
177
178 return ignore;
179 }
180
181 /**
182 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
183 * @substream: the pcm substream
184 * @hw: the hardware parameters
185 *
186 * Sets the substream runtime hardware parameters.
187 */
188 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
189 const struct snd_pcm_hardware *hw)
190 {
191 struct snd_pcm_runtime *runtime = substream->runtime;
192 runtime->hw.info = hw->info;
193 runtime->hw.formats = hw->formats;
194 runtime->hw.period_bytes_min = hw->period_bytes_min;
195 runtime->hw.period_bytes_max = hw->period_bytes_max;
196 runtime->hw.periods_min = hw->periods_min;
197 runtime->hw.periods_max = hw->periods_max;
198 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
199 runtime->hw.fifo_size = hw->fifo_size;
200 return 0;
201 }
202 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
203
204 /* DPCM stream event, send event to FE and all active BEs. */
205 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
206 int event)
207 {
208 struct snd_soc_dpcm *dpcm;
209
210 for_each_dpcm_be(fe, dir, dpcm) {
211
212 struct snd_soc_pcm_runtime *be = dpcm->be;
213
214 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
215 be->dai_link->name, event, dir);
216
217 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
218 (be->dpcm[dir].users >= 1))
219 continue;
220
221 snd_soc_dapm_stream_event(be, dir, event);
222 }
223
224 snd_soc_dapm_stream_event(fe, dir, event);
225
226 return 0;
227 }
228
229 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
230 struct snd_soc_dai *soc_dai)
231 {
232 struct snd_soc_pcm_runtime *rtd = substream->private_data;
233 int ret;
234
235 if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
236 rtd->dai_link->symmetric_rates)) {
237 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
238 soc_dai->rate);
239
240 ret = snd_pcm_hw_constraint_single(substream->runtime,
241 SNDRV_PCM_HW_PARAM_RATE,
242 soc_dai->rate);
243 if (ret < 0) {
244 dev_err(soc_dai->dev,
245 "ASoC: Unable to apply rate constraint: %d\n",
246 ret);
247 return ret;
248 }
249 }
250
251 if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
252 rtd->dai_link->symmetric_channels)) {
253 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
254 soc_dai->channels);
255
256 ret = snd_pcm_hw_constraint_single(substream->runtime,
257 SNDRV_PCM_HW_PARAM_CHANNELS,
258 soc_dai->channels);
259 if (ret < 0) {
260 dev_err(soc_dai->dev,
261 "ASoC: Unable to apply channel symmetry constraint: %d\n",
262 ret);
263 return ret;
264 }
265 }
266
267 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
268 rtd->dai_link->symmetric_samplebits)) {
269 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
270 soc_dai->sample_bits);
271
272 ret = snd_pcm_hw_constraint_single(substream->runtime,
273 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
274 soc_dai->sample_bits);
275 if (ret < 0) {
276 dev_err(soc_dai->dev,
277 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
278 ret);
279 return ret;
280 }
281 }
282
283 return 0;
284 }
285
286 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
287 struct snd_pcm_hw_params *params)
288 {
289 struct snd_soc_pcm_runtime *rtd = substream->private_data;
290 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
291 struct snd_soc_dai *codec_dai;
292 unsigned int rate, channels, sample_bits, symmetry, i;
293
294 rate = params_rate(params);
295 channels = params_channels(params);
296 sample_bits = snd_pcm_format_physical_width(params_format(params));
297
298 /* reject unmatched parameters when applying symmetry */
299 symmetry = cpu_dai->driver->symmetric_rates ||
300 rtd->dai_link->symmetric_rates;
301
302 for_each_rtd_codec_dai(rtd, i, codec_dai)
303 symmetry |= codec_dai->driver->symmetric_rates;
304
305 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
306 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
307 cpu_dai->rate, rate);
308 return -EINVAL;
309 }
310
311 symmetry = cpu_dai->driver->symmetric_channels ||
312 rtd->dai_link->symmetric_channels;
313
314 for_each_rtd_codec_dai(rtd, i, codec_dai)
315 symmetry |= codec_dai->driver->symmetric_channels;
316
317 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
318 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
319 cpu_dai->channels, channels);
320 return -EINVAL;
321 }
322
323 symmetry = cpu_dai->driver->symmetric_samplebits ||
324 rtd->dai_link->symmetric_samplebits;
325
326 for_each_rtd_codec_dai(rtd, i, codec_dai)
327 symmetry |= codec_dai->driver->symmetric_samplebits;
328
329 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
330 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
331 cpu_dai->sample_bits, sample_bits);
332 return -EINVAL;
333 }
334
335 return 0;
336 }
337
338 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
339 {
340 struct snd_soc_pcm_runtime *rtd = substream->private_data;
341 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
342 struct snd_soc_dai_link *link = rtd->dai_link;
343 struct snd_soc_dai *codec_dai;
344 unsigned int symmetry, i;
345
346 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
347 cpu_driver->symmetric_channels || link->symmetric_channels ||
348 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
349
350 for_each_rtd_codec_dai(rtd, i, codec_dai)
351 symmetry = symmetry ||
352 codec_dai->driver->symmetric_rates ||
353 codec_dai->driver->symmetric_channels ||
354 codec_dai->driver->symmetric_samplebits;
355
356 return symmetry;
357 }
358
359 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
360 {
361 struct snd_soc_pcm_runtime *rtd = substream->private_data;
362 int ret;
363
364 if (!bits)
365 return;
366
367 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
368 if (ret != 0)
369 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
370 bits, ret);
371 }
372
373 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
374 {
375 struct snd_soc_pcm_runtime *rtd = substream->private_data;
376 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
377 struct snd_soc_dai *codec_dai;
378 int i;
379 unsigned int bits = 0, cpu_bits;
380
381 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
382 for_each_rtd_codec_dai(rtd, i, codec_dai) {
383 if (codec_dai->driver->playback.sig_bits == 0) {
384 bits = 0;
385 break;
386 }
387 bits = max(codec_dai->driver->playback.sig_bits, bits);
388 }
389 cpu_bits = cpu_dai->driver->playback.sig_bits;
390 } else {
391 for_each_rtd_codec_dai(rtd, i, codec_dai) {
392 if (codec_dai->driver->capture.sig_bits == 0) {
393 bits = 0;
394 break;
395 }
396 bits = max(codec_dai->driver->capture.sig_bits, bits);
397 }
398 cpu_bits = cpu_dai->driver->capture.sig_bits;
399 }
400
401 soc_pcm_set_msb(substream, bits);
402 soc_pcm_set_msb(substream, cpu_bits);
403 }
404
405 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
406 {
407 struct snd_pcm_runtime *runtime = substream->runtime;
408 struct snd_pcm_hardware *hw = &runtime->hw;
409 struct snd_soc_pcm_runtime *rtd = substream->private_data;
410 struct snd_soc_dai *codec_dai;
411 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
412 struct snd_soc_dai_driver *codec_dai_drv;
413 struct snd_soc_pcm_stream *codec_stream;
414 struct snd_soc_pcm_stream *cpu_stream;
415 unsigned int chan_min = 0, chan_max = UINT_MAX;
416 unsigned int rate_min = 0, rate_max = UINT_MAX;
417 unsigned int rates = UINT_MAX;
418 u64 formats = ULLONG_MAX;
419 int i;
420
421 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
422 cpu_stream = &cpu_dai_drv->playback;
423 else
424 cpu_stream = &cpu_dai_drv->capture;
425
426 /* first calculate min/max only for CODECs in the DAI link */
427 for_each_rtd_codec_dai(rtd, i, codec_dai) {
428
429 /*
430 * Skip CODECs which don't support the current stream type.
431 * Otherwise, since the rate, channel, and format values will
432 * zero in that case, we would have no usable settings left,
433 * causing the resulting setup to fail.
434 * At least one CODEC should match, otherwise we should have
435 * bailed out on a higher level, since there would be no
436 * CODEC to support the transfer direction in that case.
437 */
438 if (!snd_soc_dai_stream_valid(codec_dai,
439 substream->stream))
440 continue;
441
442 codec_dai_drv = codec_dai->driver;
443 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
444 codec_stream = &codec_dai_drv->playback;
445 else
446 codec_stream = &codec_dai_drv->capture;
447 chan_min = max(chan_min, codec_stream->channels_min);
448 chan_max = min(chan_max, codec_stream->channels_max);
449 rate_min = max(rate_min, codec_stream->rate_min);
450 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
451 formats &= codec_stream->formats;
452 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
453 }
454
455 /*
456 * chan min/max cannot be enforced if there are multiple CODEC DAIs
457 * connected to a single CPU DAI, use CPU DAI's directly and let
458 * channel allocation be fixed up later
459 */
460 if (rtd->num_codecs > 1) {
461 chan_min = cpu_stream->channels_min;
462 chan_max = cpu_stream->channels_max;
463 }
464
465 hw->channels_min = max(chan_min, cpu_stream->channels_min);
466 hw->channels_max = min(chan_max, cpu_stream->channels_max);
467 if (hw->formats)
468 hw->formats &= formats & cpu_stream->formats;
469 else
470 hw->formats = formats & cpu_stream->formats;
471 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
472
473 snd_pcm_limit_hw_rates(runtime);
474
475 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
476 hw->rate_min = max(hw->rate_min, rate_min);
477 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
478 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
479 }
480
481 static int soc_pcm_components_open(struct snd_pcm_substream *substream,
482 struct snd_soc_component **last)
483 {
484 struct snd_soc_pcm_runtime *rtd = substream->private_data;
485 struct snd_soc_component *component;
486 int i, ret = 0;
487
488 for_each_rtd_components(rtd, i, component) {
489 *last = component;
490
491 ret = snd_soc_component_module_get_when_open(component);
492 if (ret < 0) {
493 dev_err(component->dev,
494 "ASoC: can't get module %s\n",
495 component->name);
496 return ret;
497 }
498
499 ret = snd_soc_component_open(component, substream);
500 if (ret < 0) {
501 dev_err(component->dev,
502 "ASoC: can't open component %s: %d\n",
503 component->name, ret);
504 return ret;
505 }
506 }
507 *last = NULL;
508 return 0;
509 }
510
511 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
512 struct snd_soc_component *last)
513 {
514 struct snd_soc_pcm_runtime *rtd = substream->private_data;
515 struct snd_soc_component *component;
516 int i, ret = 0;
517
518 for_each_rtd_components(rtd, i, component) {
519 if (component == last)
520 break;
521
522 ret |= snd_soc_component_close(component, substream);
523 snd_soc_component_module_put_when_close(component);
524 }
525
526 return ret;
527 }
528
529 /*
530 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
531 * then initialized and any private data can be allocated. This also calls
532 * startup for the cpu DAI, component, machine and codec DAI.
533 */
534 static int soc_pcm_open(struct snd_pcm_substream *substream)
535 {
536 struct snd_soc_pcm_runtime *rtd = substream->private_data;
537 struct snd_pcm_runtime *runtime = substream->runtime;
538 struct snd_soc_component *component;
539 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
540 struct snd_soc_dai *codec_dai;
541 const char *codec_dai_name = "multicodec";
542 int i, ret = 0;
543
544 for_each_rtd_components(rtd, i, component)
545 pinctrl_pm_select_default_state(component->dev);
546
547 for_each_rtd_components(rtd, i, component)
548 pm_runtime_get_sync(component->dev);
549
550 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
551
552 /* startup the audio subsystem */
553 ret = snd_soc_dai_startup(cpu_dai, substream);
554 if (ret < 0) {
555 dev_err(cpu_dai->dev, "ASoC: can't open interface %s: %d\n",
556 cpu_dai->name, ret);
557 goto out;
558 }
559
560 ret = soc_pcm_components_open(substream, &component);
561 if (ret < 0)
562 goto component_err;
563
564 for_each_rtd_codec_dai(rtd, i, codec_dai) {
565 ret = snd_soc_dai_startup(codec_dai, substream);
566 if (ret < 0) {
567 dev_err(codec_dai->dev,
568 "ASoC: can't open codec %s: %d\n",
569 codec_dai->name, ret);
570 goto codec_dai_err;
571 }
572
573 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
574 codec_dai->tx_mask = 0;
575 else
576 codec_dai->rx_mask = 0;
577 }
578
579 ret = soc_rtd_startup(rtd, substream);
580 if (ret < 0) {
581 pr_err("ASoC: %s startup failed: %d\n",
582 rtd->dai_link->name, ret);
583 goto machine_err;
584 }
585
586 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
587 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
588 goto dynamic;
589
590 /* Check that the codec and cpu DAIs are compatible */
591 soc_pcm_init_runtime_hw(substream);
592
593 if (rtd->num_codecs == 1)
594 codec_dai_name = rtd->codec_dai->name;
595
596 if (soc_pcm_has_symmetry(substream))
597 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
598
599 ret = -EINVAL;
600 if (!runtime->hw.rates) {
601 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
602 codec_dai_name, cpu_dai->name);
603 goto config_err;
604 }
605 if (!runtime->hw.formats) {
606 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
607 codec_dai_name, cpu_dai->name);
608 goto config_err;
609 }
610 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
611 runtime->hw.channels_min > runtime->hw.channels_max) {
612 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
613 codec_dai_name, cpu_dai->name);
614 goto config_err;
615 }
616
617 soc_pcm_apply_msb(substream);
618
619 /* Symmetry only applies if we've already got an active stream. */
620 if (cpu_dai->active) {
621 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
622 if (ret != 0)
623 goto config_err;
624 }
625
626 for_each_rtd_codec_dai(rtd, i, codec_dai) {
627 if (codec_dai->active) {
628 ret = soc_pcm_apply_symmetry(substream, codec_dai);
629 if (ret != 0)
630 goto config_err;
631 }
632 }
633
634 pr_debug("ASoC: %s <-> %s info:\n",
635 codec_dai_name, cpu_dai->name);
636 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
637 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
638 runtime->hw.channels_max);
639 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
640 runtime->hw.rate_max);
641
642 dynamic:
643
644 snd_soc_runtime_activate(rtd, substream->stream);
645
646 mutex_unlock(&rtd->card->pcm_mutex);
647 return 0;
648
649 config_err:
650 soc_rtd_shutdown(rtd, substream);
651
652 machine_err:
653 i = rtd->num_codecs;
654
655 codec_dai_err:
656 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai)
657 snd_soc_dai_shutdown(codec_dai, substream);
658
659 component_err:
660 soc_pcm_components_close(substream, component);
661
662 snd_soc_dai_shutdown(cpu_dai, substream);
663 out:
664 mutex_unlock(&rtd->card->pcm_mutex);
665
666 for_each_rtd_components(rtd, i, component) {
667 pm_runtime_mark_last_busy(component->dev);
668 pm_runtime_put_autosuspend(component->dev);
669 }
670
671 for_each_rtd_components(rtd, i, component)
672 if (!component->active)
673 pinctrl_pm_select_sleep_state(component->dev);
674
675 return ret;
676 }
677
678 static void codec2codec_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
679 {
680 /*
681 * Currently nothing to do for c2c links
682 * Since c2c links are internal nodes in the DAPM graph and
683 * don't interface with the outside world or application layer
684 * we don't have to do any special handling on close.
685 */
686 }
687
688 /*
689 * Called by ALSA when a PCM substream is closed. Private data can be
690 * freed here. The cpu DAI, codec DAI, machine and components are also
691 * shutdown.
692 */
693 static int soc_pcm_close(struct snd_pcm_substream *substream)
694 {
695 struct snd_soc_pcm_runtime *rtd = substream->private_data;
696 struct snd_soc_component *component;
697 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
698 struct snd_soc_dai *codec_dai;
699 int i;
700
701 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
702
703 snd_soc_runtime_deactivate(rtd, substream->stream);
704
705 /* clear the corresponding DAIs rate when inactive */
706 if (!cpu_dai->active)
707 cpu_dai->rate = 0;
708
709 for_each_rtd_codec_dai(rtd, i, codec_dai) {
710 if (!codec_dai->active)
711 codec_dai->rate = 0;
712 }
713
714 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
715
716 snd_soc_dai_shutdown(cpu_dai, substream);
717
718 for_each_rtd_codec_dai(rtd, i, codec_dai)
719 snd_soc_dai_shutdown(codec_dai, substream);
720
721 soc_rtd_shutdown(rtd, substream);
722
723 soc_pcm_components_close(substream, NULL);
724
725 snd_soc_dapm_stream_stop(rtd, substream->stream);
726
727 mutex_unlock(&rtd->card->pcm_mutex);
728
729 for_each_rtd_components(rtd, i, component) {
730 pm_runtime_mark_last_busy(component->dev);
731 pm_runtime_put_autosuspend(component->dev);
732 }
733
734 for_each_rtd_components(rtd, i, component)
735 if (!component->active)
736 pinctrl_pm_select_sleep_state(component->dev);
737
738 return 0;
739 }
740
741 /*
742 * Called by ALSA when the PCM substream is prepared, can set format, sample
743 * rate, etc. This function is non atomic and can be called multiple times,
744 * it can refer to the runtime info.
745 */
746 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
747 {
748 struct snd_soc_pcm_runtime *rtd = substream->private_data;
749 struct snd_soc_component *component;
750 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
751 struct snd_soc_dai *codec_dai;
752 int i, ret = 0;
753
754 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
755
756 ret = soc_rtd_prepare(rtd, substream);
757 if (ret < 0) {
758 dev_err(rtd->card->dev,
759 "ASoC: machine prepare error: %d\n", ret);
760 goto out;
761 }
762
763 for_each_rtd_components(rtd, i, component) {
764 ret = snd_soc_component_prepare(component, substream);
765 if (ret < 0) {
766 dev_err(component->dev,
767 "ASoC: platform prepare error: %d\n", ret);
768 goto out;
769 }
770 }
771
772 for_each_rtd_codec_dai(rtd, i, codec_dai) {
773 ret = snd_soc_dai_prepare(codec_dai, substream);
774 if (ret < 0) {
775 dev_err(codec_dai->dev,
776 "ASoC: codec DAI prepare error: %d\n",
777 ret);
778 goto out;
779 }
780 }
781
782 ret = snd_soc_dai_prepare(cpu_dai, substream);
783 if (ret < 0) {
784 dev_err(cpu_dai->dev,
785 "ASoC: cpu DAI prepare error: %d\n", ret);
786 goto out;
787 }
788
789 /* cancel any delayed stream shutdown that is pending */
790 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
791 rtd->pop_wait) {
792 rtd->pop_wait = 0;
793 cancel_delayed_work(&rtd->delayed_work);
794 }
795
796 snd_soc_dapm_stream_event(rtd, substream->stream,
797 SND_SOC_DAPM_STREAM_START);
798
799 for_each_rtd_codec_dai(rtd, i, codec_dai)
800 snd_soc_dai_digital_mute(codec_dai, 0,
801 substream->stream);
802 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
803
804 out:
805 mutex_unlock(&rtd->card->pcm_mutex);
806 return ret;
807 }
808
809 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
810 unsigned int mask)
811 {
812 struct snd_interval *interval;
813 int channels = hweight_long(mask);
814
815 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
816 interval->min = channels;
817 interval->max = channels;
818 }
819
820 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
821 struct snd_soc_component *last)
822 {
823 struct snd_soc_pcm_runtime *rtd = substream->private_data;
824 struct snd_soc_component *component;
825 int i, ret = 0;
826
827 for_each_rtd_components(rtd, i, component) {
828 if (component == last)
829 break;
830
831 ret |= snd_soc_component_hw_free(component, substream);
832 }
833
834 return ret;
835 }
836
837 /*
838 * Called by ALSA when the hardware params are set by application. This
839 * function can also be called multiple times and can allocate buffers
840 * (using snd_pcm_lib_* ). It's non-atomic.
841 */
842 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
843 struct snd_pcm_hw_params *params)
844 {
845 struct snd_soc_pcm_runtime *rtd = substream->private_data;
846 struct snd_soc_component *component;
847 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
848 struct snd_soc_dai *codec_dai;
849 int i, ret = 0;
850
851 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
852
853 ret = soc_pcm_params_symmetry(substream, params);
854 if (ret)
855 goto out;
856
857 ret = soc_rtd_hw_params(rtd, substream, params);
858 if (ret < 0) {
859 dev_err(rtd->card->dev,
860 "ASoC: machine hw_params failed: %d\n", ret);
861 goto out;
862 }
863
864 for_each_rtd_codec_dai(rtd, i, codec_dai) {
865 struct snd_pcm_hw_params codec_params;
866
867 /*
868 * Skip CODECs which don't support the current stream type,
869 * the idea being that if a CODEC is not used for the currently
870 * set up transfer direction, it should not need to be
871 * configured, especially since the configuration used might
872 * not even be supported by that CODEC. There may be cases
873 * however where a CODEC needs to be set up although it is
874 * actually not being used for the transfer, e.g. if a
875 * capture-only CODEC is acting as an LRCLK and/or BCLK master
876 * for the DAI link including a playback-only CODEC.
877 * If this becomes necessary, we will have to augment the
878 * machine driver setup with information on how to act, so
879 * we can do the right thing here.
880 */
881 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
882 continue;
883
884 /* copy params for each codec */
885 codec_params = *params;
886
887 /* fixup params based on TDM slot masks */
888 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
889 codec_dai->tx_mask)
890 soc_pcm_codec_params_fixup(&codec_params,
891 codec_dai->tx_mask);
892
893 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
894 codec_dai->rx_mask)
895 soc_pcm_codec_params_fixup(&codec_params,
896 codec_dai->rx_mask);
897
898 ret = snd_soc_dai_hw_params(codec_dai, substream,
899 &codec_params);
900 if(ret < 0)
901 goto codec_err;
902
903 codec_dai->rate = params_rate(&codec_params);
904 codec_dai->channels = params_channels(&codec_params);
905 codec_dai->sample_bits = snd_pcm_format_physical_width(
906 params_format(&codec_params));
907
908 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
909 }
910
911 ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
912 if (ret < 0)
913 goto interface_err;
914
915 /* store the parameters for each DAIs */
916 cpu_dai->rate = params_rate(params);
917 cpu_dai->channels = params_channels(params);
918 cpu_dai->sample_bits =
919 snd_pcm_format_physical_width(params_format(params));
920
921 snd_soc_dapm_update_dai(substream, params, cpu_dai);
922
923 for_each_rtd_components(rtd, i, component) {
924 ret = snd_soc_component_hw_params(component, substream, params);
925 if (ret < 0) {
926 dev_err(component->dev,
927 "ASoC: %s hw params failed: %d\n",
928 component->name, ret);
929 goto component_err;
930 }
931 }
932 component = NULL;
933
934 out:
935 mutex_unlock(&rtd->card->pcm_mutex);
936 return ret;
937
938 component_err:
939 soc_pcm_components_hw_free(substream, component);
940
941 snd_soc_dai_hw_free(cpu_dai, substream);
942 cpu_dai->rate = 0;
943
944 interface_err:
945 i = rtd->num_codecs;
946
947 codec_err:
948 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
949 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
950 continue;
951
952 snd_soc_dai_hw_free(codec_dai, substream);
953 codec_dai->rate = 0;
954 }
955
956 soc_rtd_hw_free(rtd, substream);
957
958 mutex_unlock(&rtd->card->pcm_mutex);
959 return ret;
960 }
961
962 /*
963 * Frees resources allocated by hw_params, can be called multiple times
964 */
965 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
966 {
967 struct snd_soc_pcm_runtime *rtd = substream->private_data;
968 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
969 struct snd_soc_dai *codec_dai;
970 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
971 int i;
972
973 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
974
975 /* clear the corresponding DAIs parameters when going to be inactive */
976 if (cpu_dai->active == 1) {
977 cpu_dai->rate = 0;
978 cpu_dai->channels = 0;
979 cpu_dai->sample_bits = 0;
980 }
981
982 for_each_rtd_codec_dai(rtd, i, codec_dai) {
983 if (codec_dai->active == 1) {
984 codec_dai->rate = 0;
985 codec_dai->channels = 0;
986 codec_dai->sample_bits = 0;
987 }
988 }
989
990 /* apply codec digital mute */
991 for_each_rtd_codec_dai(rtd, i, codec_dai) {
992 if ((playback && codec_dai->playback_active == 1) ||
993 (!playback && codec_dai->capture_active == 1))
994 snd_soc_dai_digital_mute(codec_dai, 1,
995 substream->stream);
996 }
997
998 /* free any machine hw params */
999 soc_rtd_hw_free(rtd, substream);
1000
1001 /* free any component resources */
1002 soc_pcm_components_hw_free(substream, NULL);
1003
1004 /* now free hw params for the DAIs */
1005 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1006 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1007 continue;
1008
1009 snd_soc_dai_hw_free(codec_dai, substream);
1010 }
1011
1012 snd_soc_dai_hw_free(cpu_dai, substream);
1013
1014 mutex_unlock(&rtd->card->pcm_mutex);
1015 return 0;
1016 }
1017
1018 static int soc_pcm_trigger_start(struct snd_pcm_substream *substream, int cmd)
1019 {
1020 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1021 struct snd_soc_component *component;
1022 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1023 struct snd_soc_dai *codec_dai;
1024 int i, ret;
1025
1026 ret = soc_rtd_trigger(rtd, substream, cmd);
1027 if (ret < 0)
1028 return ret;
1029
1030 for_each_rtd_components(rtd, i, component) {
1031 ret = snd_soc_component_trigger(component, substream, cmd);
1032 if (ret < 0)
1033 return ret;
1034 }
1035
1036 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1037 if (ret < 0)
1038 return ret;
1039
1040 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1041 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1042 if (ret < 0)
1043 return ret;
1044 }
1045
1046 return 0;
1047 }
1048
1049 static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd)
1050 {
1051 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1052 struct snd_soc_component *component;
1053 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1054 struct snd_soc_dai *codec_dai;
1055 int i, ret;
1056
1057 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1058 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1059 if (ret < 0)
1060 return ret;
1061 }
1062
1063 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1064 if (ret < 0)
1065 return ret;
1066
1067 for_each_rtd_components(rtd, i, component) {
1068 ret = snd_soc_component_trigger(component, substream, cmd);
1069 if (ret < 0)
1070 return ret;
1071 }
1072
1073 ret = soc_rtd_trigger(rtd, substream, cmd);
1074 if (ret < 0)
1075 return ret;
1076
1077 return 0;
1078 }
1079
1080 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1081 {
1082 int ret;
1083
1084 switch (cmd) {
1085 case SNDRV_PCM_TRIGGER_START:
1086 case SNDRV_PCM_TRIGGER_RESUME:
1087 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1088 ret = soc_pcm_trigger_start(substream, cmd);
1089 break;
1090 case SNDRV_PCM_TRIGGER_STOP:
1091 case SNDRV_PCM_TRIGGER_SUSPEND:
1092 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1093 ret = soc_pcm_trigger_stop(substream, cmd);
1094 break;
1095 default:
1096 return -EINVAL;
1097 }
1098
1099 return ret;
1100 }
1101
1102 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1103 int cmd)
1104 {
1105 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1106 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1107 struct snd_soc_dai *codec_dai;
1108 int i, ret;
1109
1110 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1111 ret = snd_soc_dai_bespoke_trigger(codec_dai, substream, cmd);
1112 if (ret < 0)
1113 return ret;
1114 }
1115
1116 ret = snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd);
1117 if (ret < 0)
1118 return ret;
1119
1120 return 0;
1121 }
1122 /*
1123 * soc level wrapper for pointer callback
1124 * If cpu_dai, codec_dai, component driver has the delay callback, then
1125 * the runtime->delay will be updated accordingly.
1126 */
1127 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1128 {
1129 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1130 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1131 struct snd_soc_dai *codec_dai;
1132 struct snd_pcm_runtime *runtime = substream->runtime;
1133 snd_pcm_uframes_t offset = 0;
1134 snd_pcm_sframes_t delay = 0;
1135 snd_pcm_sframes_t codec_delay = 0;
1136 int i;
1137
1138 /* clearing the previous total delay */
1139 runtime->delay = 0;
1140
1141 offset = snd_soc_pcm_component_pointer(substream);
1142
1143 /* base delay if assigned in pointer callback */
1144 delay = runtime->delay;
1145
1146 delay += snd_soc_dai_delay(cpu_dai, substream);
1147
1148 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1149 codec_delay = max(codec_delay,
1150 snd_soc_dai_delay(codec_dai, substream));
1151 }
1152 delay += codec_delay;
1153
1154 runtime->delay = delay;
1155
1156 return offset;
1157 }
1158
1159 /* connect a FE and BE */
1160 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1161 struct snd_soc_pcm_runtime *be, int stream)
1162 {
1163 struct snd_soc_dpcm *dpcm;
1164 unsigned long flags;
1165 #ifdef CONFIG_DEBUG_FS
1166 char *name;
1167 #endif
1168
1169 /* only add new dpcms */
1170 for_each_dpcm_be(fe, stream, dpcm) {
1171 if (dpcm->be == be && dpcm->fe == fe)
1172 return 0;
1173 }
1174
1175 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1176 if (!dpcm)
1177 return -ENOMEM;
1178
1179 dpcm->be = be;
1180 dpcm->fe = fe;
1181 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1182 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1183 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1184 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1185 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1186 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1187
1188 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1189 stream ? "capture" : "playback", fe->dai_link->name,
1190 stream ? "<-" : "->", be->dai_link->name);
1191
1192 #ifdef CONFIG_DEBUG_FS
1193 name = kasprintf(GFP_KERNEL, "%s:%s", be->dai_link->name,
1194 stream ? "capture" : "playback");
1195 if (name) {
1196 dpcm->debugfs_state = debugfs_create_dir(name,
1197 fe->debugfs_dpcm_root);
1198 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
1199 &dpcm->state);
1200 kfree(name);
1201 }
1202 #endif
1203 return 1;
1204 }
1205
1206 /* reparent a BE onto another FE */
1207 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1208 struct snd_soc_pcm_runtime *be, int stream)
1209 {
1210 struct snd_soc_dpcm *dpcm;
1211 struct snd_pcm_substream *fe_substream, *be_substream;
1212
1213 /* reparent if BE is connected to other FEs */
1214 if (!be->dpcm[stream].users)
1215 return;
1216
1217 be_substream = snd_soc_dpcm_get_substream(be, stream);
1218
1219 for_each_dpcm_fe(be, stream, dpcm) {
1220 if (dpcm->fe == fe)
1221 continue;
1222
1223 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1224 stream ? "capture" : "playback",
1225 dpcm->fe->dai_link->name,
1226 stream ? "<-" : "->", dpcm->be->dai_link->name);
1227
1228 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1229 be_substream->runtime = fe_substream->runtime;
1230 break;
1231 }
1232 }
1233
1234 /* disconnect a BE and FE */
1235 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1236 {
1237 struct snd_soc_dpcm *dpcm, *d;
1238 unsigned long flags;
1239
1240 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1241 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1242 stream ? "capture" : "playback",
1243 dpcm->be->dai_link->name);
1244
1245 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1246 continue;
1247
1248 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1249 stream ? "capture" : "playback", fe->dai_link->name,
1250 stream ? "<-" : "->", dpcm->be->dai_link->name);
1251
1252 /* BEs still alive need new FE */
1253 dpcm_be_reparent(fe, dpcm->be, stream);
1254
1255 #ifdef CONFIG_DEBUG_FS
1256 debugfs_remove_recursive(dpcm->debugfs_state);
1257 #endif
1258 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1259 list_del(&dpcm->list_be);
1260 list_del(&dpcm->list_fe);
1261 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1262 kfree(dpcm);
1263 }
1264 }
1265
1266 /* get BE for DAI widget and stream */
1267 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1268 struct snd_soc_dapm_widget *widget, int stream)
1269 {
1270 struct snd_soc_pcm_runtime *be;
1271 struct snd_soc_dai *dai;
1272 int i;
1273
1274 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1275
1276 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1277 for_each_card_rtds(card, be) {
1278
1279 if (!be->dai_link->no_pcm)
1280 continue;
1281
1282 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1283 be->cpu_dai->playback_widget ?
1284 be->cpu_dai->playback_widget->name : "(not set)");
1285
1286 if (be->cpu_dai->playback_widget == widget)
1287 return be;
1288
1289 for_each_rtd_codec_dai(be, i, dai) {
1290 if (dai->playback_widget == widget)
1291 return be;
1292 }
1293 }
1294 } else {
1295
1296 for_each_card_rtds(card, be) {
1297
1298 if (!be->dai_link->no_pcm)
1299 continue;
1300
1301 dev_dbg(card->dev, "ASoC: try BE %s\n",
1302 be->cpu_dai->capture_widget ?
1303 be->cpu_dai->capture_widget->name : "(not set)");
1304
1305 if (be->cpu_dai->capture_widget == widget)
1306 return be;
1307
1308 for_each_rtd_codec_dai(be, i, dai) {
1309 if (dai->capture_widget == widget)
1310 return be;
1311 }
1312 }
1313 }
1314
1315 /* dai link name and stream name set correctly ? */
1316 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1317 stream ? "capture" : "playback", widget->name);
1318 return NULL;
1319 }
1320
1321 static inline struct snd_soc_dapm_widget *
1322 dai_get_widget(struct snd_soc_dai *dai, int stream)
1323 {
1324 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1325 return dai->playback_widget;
1326 else
1327 return dai->capture_widget;
1328 }
1329
1330 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1331 struct snd_soc_dapm_widget *widget)
1332 {
1333 int i;
1334
1335 for (i = 0; i < list->num_widgets; i++) {
1336 if (widget == list->widgets[i])
1337 return 1;
1338 }
1339
1340 return 0;
1341 }
1342
1343 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1344 enum snd_soc_dapm_direction dir)
1345 {
1346 struct snd_soc_card *card = widget->dapm->card;
1347 struct snd_soc_pcm_runtime *rtd;
1348 struct snd_soc_dai *dai;
1349 int i;
1350
1351 if (dir == SND_SOC_DAPM_DIR_OUT) {
1352 for_each_card_rtds(card, rtd) {
1353 if (!rtd->dai_link->no_pcm)
1354 continue;
1355
1356 if (rtd->cpu_dai->playback_widget == widget)
1357 return true;
1358
1359 for_each_rtd_codec_dai(rtd, i, dai) {
1360 if (dai->playback_widget == widget)
1361 return true;
1362 }
1363 }
1364 } else { /* SND_SOC_DAPM_DIR_IN */
1365 for_each_card_rtds(card, rtd) {
1366 if (!rtd->dai_link->no_pcm)
1367 continue;
1368
1369 if (rtd->cpu_dai->capture_widget == widget)
1370 return true;
1371
1372 for_each_rtd_codec_dai(rtd, i, dai) {
1373 if (dai->capture_widget == widget)
1374 return true;
1375 }
1376 }
1377 }
1378
1379 return false;
1380 }
1381
1382 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1383 int stream, struct snd_soc_dapm_widget_list **list)
1384 {
1385 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1386 int paths;
1387
1388 /* get number of valid DAI paths and their widgets */
1389 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1390 dpcm_end_walk_at_be);
1391
1392 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1393 stream ? "capture" : "playback");
1394
1395 return paths;
1396 }
1397
1398 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1399 struct snd_soc_dapm_widget_list **list_)
1400 {
1401 struct snd_soc_dpcm *dpcm;
1402 struct snd_soc_dapm_widget_list *list = *list_;
1403 struct snd_soc_dapm_widget *widget;
1404 struct snd_soc_dai *dai;
1405 int prune = 0;
1406 int do_prune;
1407
1408 /* Destroy any old FE <--> BE connections */
1409 for_each_dpcm_be(fe, stream, dpcm) {
1410 unsigned int i;
1411
1412 /* is there a valid CPU DAI widget for this BE */
1413 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1414
1415 /* prune the BE if it's no longer in our active list */
1416 if (widget && widget_in_list(list, widget))
1417 continue;
1418
1419 /* is there a valid CODEC DAI widget for this BE */
1420 do_prune = 1;
1421 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1422 widget = dai_get_widget(dai, stream);
1423
1424 /* prune the BE if it's no longer in our active list */
1425 if (widget && widget_in_list(list, widget))
1426 do_prune = 0;
1427 }
1428 if (!do_prune)
1429 continue;
1430
1431 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1432 stream ? "capture" : "playback",
1433 dpcm->be->dai_link->name, fe->dai_link->name);
1434 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1435 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1436 prune++;
1437 }
1438
1439 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1440 return prune;
1441 }
1442
1443 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1444 struct snd_soc_dapm_widget_list **list_)
1445 {
1446 struct snd_soc_card *card = fe->card;
1447 struct snd_soc_dapm_widget_list *list = *list_;
1448 struct snd_soc_pcm_runtime *be;
1449 int i, new = 0, err;
1450
1451 /* Create any new FE <--> BE connections */
1452 for (i = 0; i < list->num_widgets; i++) {
1453
1454 switch (list->widgets[i]->id) {
1455 case snd_soc_dapm_dai_in:
1456 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1457 continue;
1458 break;
1459 case snd_soc_dapm_dai_out:
1460 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1461 continue;
1462 break;
1463 default:
1464 continue;
1465 }
1466
1467 /* is there a valid BE rtd for this widget */
1468 be = dpcm_get_be(card, list->widgets[i], stream);
1469 if (!be) {
1470 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1471 list->widgets[i]->name);
1472 continue;
1473 }
1474
1475 /* make sure BE is a real BE */
1476 if (!be->dai_link->no_pcm)
1477 continue;
1478
1479 /* don't connect if FE is not running */
1480 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1481 continue;
1482
1483 /* newly connected FE and BE */
1484 err = dpcm_be_connect(fe, be, stream);
1485 if (err < 0) {
1486 dev_err(fe->dev, "ASoC: can't connect %s\n",
1487 list->widgets[i]->name);
1488 break;
1489 } else if (err == 0) /* already connected */
1490 continue;
1491
1492 /* new */
1493 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1494 new++;
1495 }
1496
1497 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1498 return new;
1499 }
1500
1501 /*
1502 * Find the corresponding BE DAIs that source or sink audio to this
1503 * FE substream.
1504 */
1505 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1506 int stream, struct snd_soc_dapm_widget_list **list, int new)
1507 {
1508 if (new)
1509 return dpcm_add_paths(fe, stream, list);
1510 else
1511 return dpcm_prune_paths(fe, stream, list);
1512 }
1513
1514 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1515 {
1516 struct snd_soc_dpcm *dpcm;
1517 unsigned long flags;
1518
1519 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1520 for_each_dpcm_be(fe, stream, dpcm)
1521 dpcm->be->dpcm[stream].runtime_update =
1522 SND_SOC_DPCM_UPDATE_NO;
1523 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1524 }
1525
1526 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1527 int stream)
1528 {
1529 struct snd_soc_dpcm *dpcm;
1530
1531 /* disable any enabled and non active backends */
1532 for_each_dpcm_be(fe, stream, dpcm) {
1533
1534 struct snd_soc_pcm_runtime *be = dpcm->be;
1535 struct snd_pcm_substream *be_substream =
1536 snd_soc_dpcm_get_substream(be, stream);
1537
1538 if (be->dpcm[stream].users == 0)
1539 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1540 stream ? "capture" : "playback",
1541 be->dpcm[stream].state);
1542
1543 if (--be->dpcm[stream].users != 0)
1544 continue;
1545
1546 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1547 continue;
1548
1549 soc_pcm_close(be_substream);
1550 be_substream->runtime = NULL;
1551 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1552 }
1553 }
1554
1555 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1556 {
1557 struct snd_soc_dpcm *dpcm;
1558 int err, count = 0;
1559
1560 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1561 for_each_dpcm_be(fe, stream, dpcm) {
1562
1563 struct snd_soc_pcm_runtime *be = dpcm->be;
1564 struct snd_pcm_substream *be_substream =
1565 snd_soc_dpcm_get_substream(be, stream);
1566
1567 if (!be_substream) {
1568 dev_err(be->dev, "ASoC: no backend %s stream\n",
1569 stream ? "capture" : "playback");
1570 continue;
1571 }
1572
1573 /* is this op for this BE ? */
1574 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1575 continue;
1576
1577 /* first time the dpcm is open ? */
1578 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1579 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1580 stream ? "capture" : "playback",
1581 be->dpcm[stream].state);
1582
1583 if (be->dpcm[stream].users++ != 0)
1584 continue;
1585
1586 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1587 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1588 continue;
1589
1590 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1591 stream ? "capture" : "playback", be->dai_link->name);
1592
1593 be_substream->runtime = be->dpcm[stream].runtime;
1594 err = soc_pcm_open(be_substream);
1595 if (err < 0) {
1596 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1597 be->dpcm[stream].users--;
1598 if (be->dpcm[stream].users < 0)
1599 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1600 stream ? "capture" : "playback",
1601 be->dpcm[stream].state);
1602
1603 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1604 goto unwind;
1605 }
1606
1607 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1608 count++;
1609 }
1610
1611 return count;
1612
1613 unwind:
1614 /* disable any enabled and non active backends */
1615 for_each_dpcm_be_rollback(fe, stream, dpcm) {
1616 struct snd_soc_pcm_runtime *be = dpcm->be;
1617 struct snd_pcm_substream *be_substream =
1618 snd_soc_dpcm_get_substream(be, stream);
1619
1620 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1621 continue;
1622
1623 if (be->dpcm[stream].users == 0)
1624 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1625 stream ? "capture" : "playback",
1626 be->dpcm[stream].state);
1627
1628 if (--be->dpcm[stream].users != 0)
1629 continue;
1630
1631 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1632 continue;
1633
1634 soc_pcm_close(be_substream);
1635 be_substream->runtime = NULL;
1636 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1637 }
1638
1639 return err;
1640 }
1641
1642 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1643 struct snd_soc_pcm_stream *stream)
1644 {
1645 runtime->hw.rate_min = stream->rate_min;
1646 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1647 runtime->hw.channels_min = stream->channels_min;
1648 runtime->hw.channels_max = stream->channels_max;
1649 if (runtime->hw.formats)
1650 runtime->hw.formats &= stream->formats;
1651 else
1652 runtime->hw.formats = stream->formats;
1653 runtime->hw.rates = stream->rates;
1654 }
1655
1656 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1657 u64 *formats)
1658 {
1659 struct snd_soc_pcm_runtime *fe = substream->private_data;
1660 struct snd_soc_dpcm *dpcm;
1661 struct snd_soc_dai *dai;
1662 int stream = substream->stream;
1663
1664 if (!fe->dai_link->dpcm_merged_format)
1665 return;
1666
1667 /*
1668 * It returns merged BE codec format
1669 * if FE want to use it (= dpcm_merged_format)
1670 */
1671
1672 for_each_dpcm_be(fe, stream, dpcm) {
1673 struct snd_soc_pcm_runtime *be = dpcm->be;
1674 struct snd_soc_dai_driver *codec_dai_drv;
1675 struct snd_soc_pcm_stream *codec_stream;
1676 int i;
1677
1678 for_each_rtd_codec_dai(be, i, dai) {
1679 /*
1680 * Skip CODECs which don't support the current stream
1681 * type. See soc_pcm_init_runtime_hw() for more details
1682 */
1683 if (!snd_soc_dai_stream_valid(dai, stream))
1684 continue;
1685
1686 codec_dai_drv = dai->driver;
1687 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1688 codec_stream = &codec_dai_drv->playback;
1689 else
1690 codec_stream = &codec_dai_drv->capture;
1691
1692 *formats &= codec_stream->formats;
1693 }
1694 }
1695 }
1696
1697 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1698 unsigned int *channels_min,
1699 unsigned int *channels_max)
1700 {
1701 struct snd_soc_pcm_runtime *fe = substream->private_data;
1702 struct snd_soc_dpcm *dpcm;
1703 int stream = substream->stream;
1704
1705 if (!fe->dai_link->dpcm_merged_chan)
1706 return;
1707
1708 /*
1709 * It returns merged BE codec channel;
1710 * if FE want to use it (= dpcm_merged_chan)
1711 */
1712
1713 for_each_dpcm_be(fe, stream, dpcm) {
1714 struct snd_soc_pcm_runtime *be = dpcm->be;
1715 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1716 struct snd_soc_dai_driver *codec_dai_drv;
1717 struct snd_soc_pcm_stream *codec_stream;
1718 struct snd_soc_pcm_stream *cpu_stream;
1719
1720 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1721 cpu_stream = &cpu_dai_drv->playback;
1722 else
1723 cpu_stream = &cpu_dai_drv->capture;
1724
1725 *channels_min = max(*channels_min, cpu_stream->channels_min);
1726 *channels_max = min(*channels_max, cpu_stream->channels_max);
1727
1728 /*
1729 * chan min/max cannot be enforced if there are multiple CODEC
1730 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1731 */
1732 if (be->num_codecs == 1) {
1733 codec_dai_drv = be->codec_dais[0]->driver;
1734
1735 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1736 codec_stream = &codec_dai_drv->playback;
1737 else
1738 codec_stream = &codec_dai_drv->capture;
1739
1740 *channels_min = max(*channels_min,
1741 codec_stream->channels_min);
1742 *channels_max = min(*channels_max,
1743 codec_stream->channels_max);
1744 }
1745 }
1746 }
1747
1748 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1749 unsigned int *rates,
1750 unsigned int *rate_min,
1751 unsigned int *rate_max)
1752 {
1753 struct snd_soc_pcm_runtime *fe = substream->private_data;
1754 struct snd_soc_dpcm *dpcm;
1755 int stream = substream->stream;
1756
1757 if (!fe->dai_link->dpcm_merged_rate)
1758 return;
1759
1760 /*
1761 * It returns merged BE codec channel;
1762 * if FE want to use it (= dpcm_merged_chan)
1763 */
1764
1765 for_each_dpcm_be(fe, stream, dpcm) {
1766 struct snd_soc_pcm_runtime *be = dpcm->be;
1767 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1768 struct snd_soc_dai_driver *codec_dai_drv;
1769 struct snd_soc_pcm_stream *codec_stream;
1770 struct snd_soc_pcm_stream *cpu_stream;
1771 struct snd_soc_dai *dai;
1772 int i;
1773
1774 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1775 cpu_stream = &cpu_dai_drv->playback;
1776 else
1777 cpu_stream = &cpu_dai_drv->capture;
1778
1779 *rate_min = max(*rate_min, cpu_stream->rate_min);
1780 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1781 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1782
1783 for_each_rtd_codec_dai(be, i, dai) {
1784 /*
1785 * Skip CODECs which don't support the current stream
1786 * type. See soc_pcm_init_runtime_hw() for more details
1787 */
1788 if (!snd_soc_dai_stream_valid(dai, stream))
1789 continue;
1790
1791 codec_dai_drv = dai->driver;
1792 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1793 codec_stream = &codec_dai_drv->playback;
1794 else
1795 codec_stream = &codec_dai_drv->capture;
1796
1797 *rate_min = max(*rate_min, codec_stream->rate_min);
1798 *rate_max = min_not_zero(*rate_max,
1799 codec_stream->rate_max);
1800 *rates = snd_pcm_rate_mask_intersect(*rates,
1801 codec_stream->rates);
1802 }
1803 }
1804 }
1805
1806 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1807 {
1808 struct snd_pcm_runtime *runtime = substream->runtime;
1809 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1810 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1811 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1812
1813 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1814 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1815 else
1816 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1817
1818 dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1819 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1820 &runtime->hw.channels_max);
1821 dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1822 &runtime->hw.rate_min, &runtime->hw.rate_max);
1823 }
1824
1825 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1826
1827 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1828 * for avoiding the race with trigger callback.
1829 * If the state is unset and a trigger is pending while the previous operation,
1830 * process the pending trigger action here.
1831 */
1832 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1833 int stream, enum snd_soc_dpcm_update state)
1834 {
1835 struct snd_pcm_substream *substream =
1836 snd_soc_dpcm_get_substream(fe, stream);
1837
1838 snd_pcm_stream_lock_irq(substream);
1839 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1840 dpcm_fe_dai_do_trigger(substream,
1841 fe->dpcm[stream].trigger_pending - 1);
1842 fe->dpcm[stream].trigger_pending = 0;
1843 }
1844 fe->dpcm[stream].runtime_update = state;
1845 snd_pcm_stream_unlock_irq(substream);
1846 }
1847
1848 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1849 int stream)
1850 {
1851 struct snd_soc_dpcm *dpcm;
1852 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1853 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1854 int err;
1855
1856 /* apply symmetry for FE */
1857 if (soc_pcm_has_symmetry(fe_substream))
1858 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1859
1860 /* Symmetry only applies if we've got an active stream. */
1861 if (fe_cpu_dai->active) {
1862 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1863 if (err < 0)
1864 return err;
1865 }
1866
1867 /* apply symmetry for BE */
1868 for_each_dpcm_be(fe, stream, dpcm) {
1869 struct snd_soc_pcm_runtime *be = dpcm->be;
1870 struct snd_pcm_substream *be_substream =
1871 snd_soc_dpcm_get_substream(be, stream);
1872 struct snd_soc_pcm_runtime *rtd;
1873 struct snd_soc_dai *codec_dai;
1874 int i;
1875
1876 /* A backend may not have the requested substream */
1877 if (!be_substream)
1878 continue;
1879
1880 rtd = be_substream->private_data;
1881 if (rtd->dai_link->be_hw_params_fixup)
1882 continue;
1883
1884 if (soc_pcm_has_symmetry(be_substream))
1885 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1886
1887 /* Symmetry only applies if we've got an active stream. */
1888 if (rtd->cpu_dai->active) {
1889 err = soc_pcm_apply_symmetry(fe_substream,
1890 rtd->cpu_dai);
1891 if (err < 0)
1892 return err;
1893 }
1894
1895 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1896 if (codec_dai->active) {
1897 err = soc_pcm_apply_symmetry(fe_substream,
1898 codec_dai);
1899 if (err < 0)
1900 return err;
1901 }
1902 }
1903 }
1904
1905 return 0;
1906 }
1907
1908 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1909 {
1910 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1911 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1912 int stream = fe_substream->stream, ret = 0;
1913
1914 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1915
1916 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1917 if (ret < 0) {
1918 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1919 goto be_err;
1920 }
1921
1922 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1923
1924 /* start the DAI frontend */
1925 ret = soc_pcm_open(fe_substream);
1926 if (ret < 0) {
1927 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1928 goto unwind;
1929 }
1930
1931 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1932
1933 dpcm_set_fe_runtime(fe_substream);
1934 snd_pcm_limit_hw_rates(runtime);
1935
1936 ret = dpcm_apply_symmetry(fe_substream, stream);
1937 if (ret < 0) {
1938 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1939 ret);
1940 goto unwind;
1941 }
1942
1943 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1944 return 0;
1945
1946 unwind:
1947 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1948 be_err:
1949 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1950 return ret;
1951 }
1952
1953 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1954 {
1955 struct snd_soc_dpcm *dpcm;
1956
1957 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1958 for_each_dpcm_be(fe, stream, dpcm) {
1959
1960 struct snd_soc_pcm_runtime *be = dpcm->be;
1961 struct snd_pcm_substream *be_substream =
1962 snd_soc_dpcm_get_substream(be, stream);
1963
1964 /* is this op for this BE ? */
1965 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1966 continue;
1967
1968 if (be->dpcm[stream].users == 0)
1969 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1970 stream ? "capture" : "playback",
1971 be->dpcm[stream].state);
1972
1973 if (--be->dpcm[stream].users != 0)
1974 continue;
1975
1976 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1977 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
1978 soc_pcm_hw_free(be_substream);
1979 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1980 }
1981
1982 dev_dbg(be->dev, "ASoC: close BE %s\n",
1983 be->dai_link->name);
1984
1985 soc_pcm_close(be_substream);
1986 be_substream->runtime = NULL;
1987
1988 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1989 }
1990 return 0;
1991 }
1992
1993 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1994 {
1995 struct snd_soc_pcm_runtime *fe = substream->private_data;
1996 int stream = substream->stream;
1997
1998 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1999
2000 /* shutdown the BEs */
2001 dpcm_be_dai_shutdown(fe, substream->stream);
2002
2003 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2004
2005 /* now shutdown the frontend */
2006 soc_pcm_close(substream);
2007
2008 /* run the stream event for each BE */
2009 snd_soc_dapm_stream_stop(fe, stream);
2010
2011 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2012 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2013 return 0;
2014 }
2015
2016 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2017 {
2018 struct snd_soc_dpcm *dpcm;
2019
2020 /* only hw_params backends that are either sinks or sources
2021 * to this frontend DAI */
2022 for_each_dpcm_be(fe, stream, dpcm) {
2023
2024 struct snd_soc_pcm_runtime *be = dpcm->be;
2025 struct snd_pcm_substream *be_substream =
2026 snd_soc_dpcm_get_substream(be, stream);
2027
2028 /* is this op for this BE ? */
2029 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2030 continue;
2031
2032 /* only free hw when no longer used - check all FEs */
2033 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2034 continue;
2035
2036 /* do not free hw if this BE is used by other FE */
2037 if (be->dpcm[stream].users > 1)
2038 continue;
2039
2040 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2041 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2042 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2043 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2044 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2045 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2046 continue;
2047
2048 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2049 be->dai_link->name);
2050
2051 soc_pcm_hw_free(be_substream);
2052
2053 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2054 }
2055
2056 return 0;
2057 }
2058
2059 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2060 {
2061 struct snd_soc_pcm_runtime *fe = substream->private_data;
2062 int err, stream = substream->stream;
2063
2064 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2065 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2066
2067 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2068
2069 /* call hw_free on the frontend */
2070 err = soc_pcm_hw_free(substream);
2071 if (err < 0)
2072 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2073 fe->dai_link->name);
2074
2075 /* only hw_params backends that are either sinks or sources
2076 * to this frontend DAI */
2077 err = dpcm_be_dai_hw_free(fe, stream);
2078
2079 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2080 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2081
2082 mutex_unlock(&fe->card->mutex);
2083 return 0;
2084 }
2085
2086 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2087 {
2088 struct snd_soc_dpcm *dpcm;
2089 int ret;
2090
2091 for_each_dpcm_be(fe, stream, dpcm) {
2092
2093 struct snd_soc_pcm_runtime *be = dpcm->be;
2094 struct snd_pcm_substream *be_substream =
2095 snd_soc_dpcm_get_substream(be, stream);
2096
2097 /* is this op for this BE ? */
2098 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2099 continue;
2100
2101 /* copy params for each dpcm */
2102 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2103 sizeof(struct snd_pcm_hw_params));
2104
2105 /* perform any hw_params fixups */
2106 if (be->dai_link->be_hw_params_fixup) {
2107 ret = be->dai_link->be_hw_params_fixup(be,
2108 &dpcm->hw_params);
2109 if (ret < 0) {
2110 dev_err(be->dev,
2111 "ASoC: hw_params BE fixup failed %d\n",
2112 ret);
2113 goto unwind;
2114 }
2115 }
2116
2117 /* copy the fixed-up hw params for BE dai */
2118 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2119 sizeof(struct snd_pcm_hw_params));
2120
2121 /* only allow hw_params() if no connected FEs are running */
2122 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2123 continue;
2124
2125 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2126 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2127 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2128 continue;
2129
2130 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2131 be->dai_link->name);
2132
2133 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2134 if (ret < 0) {
2135 dev_err(dpcm->be->dev,
2136 "ASoC: hw_params BE failed %d\n", ret);
2137 goto unwind;
2138 }
2139
2140 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2141 }
2142 return 0;
2143
2144 unwind:
2145 /* disable any enabled and non active backends */
2146 for_each_dpcm_be_rollback(fe, stream, dpcm) {
2147 struct snd_soc_pcm_runtime *be = dpcm->be;
2148 struct snd_pcm_substream *be_substream =
2149 snd_soc_dpcm_get_substream(be, stream);
2150
2151 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2152 continue;
2153
2154 /* only allow hw_free() if no connected FEs are running */
2155 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2156 continue;
2157
2158 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2159 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2160 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2161 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2162 continue;
2163
2164 soc_pcm_hw_free(be_substream);
2165 }
2166
2167 return ret;
2168 }
2169
2170 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2171 struct snd_pcm_hw_params *params)
2172 {
2173 struct snd_soc_pcm_runtime *fe = substream->private_data;
2174 int ret, stream = substream->stream;
2175
2176 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2177 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2178
2179 memcpy(&fe->dpcm[substream->stream].hw_params, params,
2180 sizeof(struct snd_pcm_hw_params));
2181 ret = dpcm_be_dai_hw_params(fe, substream->stream);
2182 if (ret < 0) {
2183 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2184 goto out;
2185 }
2186
2187 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2188 fe->dai_link->name, params_rate(params),
2189 params_channels(params), params_format(params));
2190
2191 /* call hw_params on the frontend */
2192 ret = soc_pcm_hw_params(substream, params);
2193 if (ret < 0) {
2194 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2195 dpcm_be_dai_hw_free(fe, stream);
2196 } else
2197 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2198
2199 out:
2200 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2201 mutex_unlock(&fe->card->mutex);
2202 return ret;
2203 }
2204
2205 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2206 struct snd_pcm_substream *substream, int cmd)
2207 {
2208 int ret;
2209
2210 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2211 dpcm->be->dai_link->name, cmd);
2212
2213 ret = soc_pcm_trigger(substream, cmd);
2214 if (ret < 0)
2215 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2216
2217 return ret;
2218 }
2219
2220 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2221 int cmd)
2222 {
2223 struct snd_soc_dpcm *dpcm;
2224 int ret = 0;
2225
2226 for_each_dpcm_be(fe, stream, dpcm) {
2227
2228 struct snd_soc_pcm_runtime *be = dpcm->be;
2229 struct snd_pcm_substream *be_substream =
2230 snd_soc_dpcm_get_substream(be, stream);
2231
2232 /* is this op for this BE ? */
2233 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2234 continue;
2235
2236 switch (cmd) {
2237 case SNDRV_PCM_TRIGGER_START:
2238 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2239 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2240 continue;
2241
2242 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2243 if (ret)
2244 return ret;
2245
2246 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2247 break;
2248 case SNDRV_PCM_TRIGGER_RESUME:
2249 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2250 continue;
2251
2252 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2253 if (ret)
2254 return ret;
2255
2256 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2257 break;
2258 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2259 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2260 continue;
2261
2262 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2263 if (ret)
2264 return ret;
2265
2266 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2267 break;
2268 case SNDRV_PCM_TRIGGER_STOP:
2269 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2270 continue;
2271
2272 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2273 continue;
2274
2275 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2276 if (ret)
2277 return ret;
2278
2279 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2280 break;
2281 case SNDRV_PCM_TRIGGER_SUSPEND:
2282 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2283 continue;
2284
2285 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2286 continue;
2287
2288 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2289 if (ret)
2290 return ret;
2291
2292 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2293 break;
2294 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2295 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2296 continue;
2297
2298 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2299 continue;
2300
2301 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2302 if (ret)
2303 return ret;
2304
2305 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2306 break;
2307 }
2308 }
2309
2310 return ret;
2311 }
2312 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2313
2314 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2315 int cmd, bool fe_first)
2316 {
2317 struct snd_soc_pcm_runtime *fe = substream->private_data;
2318 int ret;
2319
2320 /* call trigger on the frontend before the backend. */
2321 if (fe_first) {
2322 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2323 fe->dai_link->name, cmd);
2324
2325 ret = soc_pcm_trigger(substream, cmd);
2326 if (ret < 0)
2327 return ret;
2328
2329 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2330 return ret;
2331 }
2332
2333 /* call trigger on the frontend after the backend. */
2334 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2335 if (ret < 0)
2336 return ret;
2337
2338 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2339 fe->dai_link->name, cmd);
2340
2341 ret = soc_pcm_trigger(substream, cmd);
2342
2343 return ret;
2344 }
2345
2346 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2347 {
2348 struct snd_soc_pcm_runtime *fe = substream->private_data;
2349 int stream = substream->stream;
2350 int ret = 0;
2351 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2352
2353 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2354
2355 switch (trigger) {
2356 case SND_SOC_DPCM_TRIGGER_PRE:
2357 switch (cmd) {
2358 case SNDRV_PCM_TRIGGER_START:
2359 case SNDRV_PCM_TRIGGER_RESUME:
2360 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2361 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2362 break;
2363 case SNDRV_PCM_TRIGGER_STOP:
2364 case SNDRV_PCM_TRIGGER_SUSPEND:
2365 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2366 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2367 break;
2368 default:
2369 ret = -EINVAL;
2370 break;
2371 }
2372 break;
2373 case SND_SOC_DPCM_TRIGGER_POST:
2374 switch (cmd) {
2375 case SNDRV_PCM_TRIGGER_START:
2376 case SNDRV_PCM_TRIGGER_RESUME:
2377 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2378 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2379 break;
2380 case SNDRV_PCM_TRIGGER_STOP:
2381 case SNDRV_PCM_TRIGGER_SUSPEND:
2382 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2383 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2384 break;
2385 default:
2386 ret = -EINVAL;
2387 break;
2388 }
2389 break;
2390 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2391 /* bespoke trigger() - handles both FE and BEs */
2392
2393 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2394 fe->dai_link->name, cmd);
2395
2396 ret = soc_pcm_bespoke_trigger(substream, cmd);
2397 break;
2398 default:
2399 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2400 fe->dai_link->name);
2401 ret = -EINVAL;
2402 goto out;
2403 }
2404
2405 if (ret < 0) {
2406 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2407 cmd, ret);
2408 goto out;
2409 }
2410
2411 switch (cmd) {
2412 case SNDRV_PCM_TRIGGER_START:
2413 case SNDRV_PCM_TRIGGER_RESUME:
2414 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2415 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2416 break;
2417 case SNDRV_PCM_TRIGGER_STOP:
2418 case SNDRV_PCM_TRIGGER_SUSPEND:
2419 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2420 break;
2421 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2422 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2423 break;
2424 }
2425
2426 out:
2427 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2428 return ret;
2429 }
2430
2431 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2432 {
2433 struct snd_soc_pcm_runtime *fe = substream->private_data;
2434 int stream = substream->stream;
2435
2436 /* if FE's runtime_update is already set, we're in race;
2437 * process this trigger later at exit
2438 */
2439 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2440 fe->dpcm[stream].trigger_pending = cmd + 1;
2441 return 0; /* delayed, assuming it's successful */
2442 }
2443
2444 /* we're alone, let's trigger */
2445 return dpcm_fe_dai_do_trigger(substream, cmd);
2446 }
2447
2448 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2449 {
2450 struct snd_soc_dpcm *dpcm;
2451 int ret = 0;
2452
2453 for_each_dpcm_be(fe, stream, dpcm) {
2454
2455 struct snd_soc_pcm_runtime *be = dpcm->be;
2456 struct snd_pcm_substream *be_substream =
2457 snd_soc_dpcm_get_substream(be, stream);
2458
2459 /* is this op for this BE ? */
2460 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2461 continue;
2462
2463 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2464 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2465 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2466 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2467 continue;
2468
2469 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2470 be->dai_link->name);
2471
2472 ret = soc_pcm_prepare(be_substream);
2473 if (ret < 0) {
2474 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2475 ret);
2476 break;
2477 }
2478
2479 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2480 }
2481 return ret;
2482 }
2483
2484 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2485 {
2486 struct snd_soc_pcm_runtime *fe = substream->private_data;
2487 int stream = substream->stream, ret = 0;
2488
2489 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2490
2491 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2492
2493 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2494
2495 /* there is no point preparing this FE if there are no BEs */
2496 if (list_empty(&fe->dpcm[stream].be_clients)) {
2497 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2498 fe->dai_link->name);
2499 ret = -EINVAL;
2500 goto out;
2501 }
2502
2503 ret = dpcm_be_dai_prepare(fe, substream->stream);
2504 if (ret < 0)
2505 goto out;
2506
2507 /* call prepare on the frontend */
2508 ret = soc_pcm_prepare(substream);
2509 if (ret < 0) {
2510 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2511 fe->dai_link->name);
2512 goto out;
2513 }
2514
2515 /* run the stream event for each BE */
2516 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2517 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2518
2519 out:
2520 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2521 mutex_unlock(&fe->card->mutex);
2522
2523 return ret;
2524 }
2525
2526 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2527 {
2528 struct snd_pcm_substream *substream =
2529 snd_soc_dpcm_get_substream(fe, stream);
2530 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2531 int err;
2532
2533 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2534 stream ? "capture" : "playback", fe->dai_link->name);
2535
2536 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2537 /* call bespoke trigger - FE takes care of all BE triggers */
2538 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2539 fe->dai_link->name);
2540
2541 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2542 if (err < 0)
2543 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2544 } else {
2545 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2546 fe->dai_link->name);
2547
2548 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2549 if (err < 0)
2550 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2551 }
2552
2553 err = dpcm_be_dai_hw_free(fe, stream);
2554 if (err < 0)
2555 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2556
2557 err = dpcm_be_dai_shutdown(fe, stream);
2558 if (err < 0)
2559 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2560
2561 /* run the stream event for each BE */
2562 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2563
2564 return 0;
2565 }
2566
2567 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2568 {
2569 struct snd_pcm_substream *substream =
2570 snd_soc_dpcm_get_substream(fe, stream);
2571 struct snd_soc_dpcm *dpcm;
2572 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2573 int ret;
2574 unsigned long flags;
2575
2576 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2577 stream ? "capture" : "playback", fe->dai_link->name);
2578
2579 /* Only start the BE if the FE is ready */
2580 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2581 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2582 return -EINVAL;
2583
2584 /* startup must always be called for new BEs */
2585 ret = dpcm_be_dai_startup(fe, stream);
2586 if (ret < 0)
2587 goto disconnect;
2588
2589 /* keep going if FE state is > open */
2590 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2591 return 0;
2592
2593 ret = dpcm_be_dai_hw_params(fe, stream);
2594 if (ret < 0)
2595 goto close;
2596
2597 /* keep going if FE state is > hw_params */
2598 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2599 return 0;
2600
2601
2602 ret = dpcm_be_dai_prepare(fe, stream);
2603 if (ret < 0)
2604 goto hw_free;
2605
2606 /* run the stream event for each BE */
2607 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2608
2609 /* keep going if FE state is > prepare */
2610 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2611 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2612 return 0;
2613
2614 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2615 /* call trigger on the frontend - FE takes care of all BE triggers */
2616 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2617 fe->dai_link->name);
2618
2619 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2620 if (ret < 0) {
2621 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2622 goto hw_free;
2623 }
2624 } else {
2625 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2626 fe->dai_link->name);
2627
2628 ret = dpcm_be_dai_trigger(fe, stream,
2629 SNDRV_PCM_TRIGGER_START);
2630 if (ret < 0) {
2631 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2632 goto hw_free;
2633 }
2634 }
2635
2636 return 0;
2637
2638 hw_free:
2639 dpcm_be_dai_hw_free(fe, stream);
2640 close:
2641 dpcm_be_dai_shutdown(fe, stream);
2642 disconnect:
2643 /* disconnect any non started BEs */
2644 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2645 for_each_dpcm_be(fe, stream, dpcm) {
2646 struct snd_soc_pcm_runtime *be = dpcm->be;
2647 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2648 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2649 }
2650 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2651
2652 return ret;
2653 }
2654
2655 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2656 {
2657 int ret;
2658
2659 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2660 ret = dpcm_run_update_startup(fe, stream);
2661 if (ret < 0)
2662 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2663 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2664
2665 return ret;
2666 }
2667
2668 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2669 {
2670 int ret;
2671
2672 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2673 ret = dpcm_run_update_shutdown(fe, stream);
2674 if (ret < 0)
2675 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2676 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2677
2678 return ret;
2679 }
2680
2681 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2682 {
2683 struct snd_soc_dapm_widget_list *list;
2684 int count, paths;
2685
2686 if (!fe->dai_link->dynamic)
2687 return 0;
2688
2689 /* only check active links */
2690 if (!fe->cpu_dai->active)
2691 return 0;
2692
2693 /* DAPM sync will call this to update DSP paths */
2694 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2695 new ? "new" : "old", fe->dai_link->name);
2696
2697 /* skip if FE doesn't have playback capability */
2698 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK) ||
2699 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
2700 goto capture;
2701
2702 /* skip if FE isn't currently playing */
2703 if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2704 goto capture;
2705
2706 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2707 if (paths < 0) {
2708 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2709 fe->dai_link->name, "playback");
2710 return paths;
2711 }
2712
2713 /* update any playback paths */
2714 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2715 if (count) {
2716 if (new)
2717 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2718 else
2719 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2720
2721 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2722 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2723 }
2724
2725 dpcm_path_put(&list);
2726
2727 capture:
2728 /* skip if FE doesn't have capture capability */
2729 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE) ||
2730 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE))
2731 return 0;
2732
2733 /* skip if FE isn't currently capturing */
2734 if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2735 return 0;
2736
2737 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2738 if (paths < 0) {
2739 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2740 fe->dai_link->name, "capture");
2741 return paths;
2742 }
2743
2744 /* update any old capture paths */
2745 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2746 if (count) {
2747 if (new)
2748 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2749 else
2750 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2751
2752 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2753 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2754 }
2755
2756 dpcm_path_put(&list);
2757
2758 return 0;
2759 }
2760
2761 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2762 * any DAI links.
2763 */
2764 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2765 {
2766 struct snd_soc_pcm_runtime *fe;
2767 int ret = 0;
2768
2769 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2770 /* shutdown all old paths first */
2771 for_each_card_rtds(card, fe) {
2772 ret = soc_dpcm_fe_runtime_update(fe, 0);
2773 if (ret)
2774 goto out;
2775 }
2776
2777 /* bring new paths up */
2778 for_each_card_rtds(card, fe) {
2779 ret = soc_dpcm_fe_runtime_update(fe, 1);
2780 if (ret)
2781 goto out;
2782 }
2783
2784 out:
2785 mutex_unlock(&card->mutex);
2786 return ret;
2787 }
2788 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2789 {
2790 struct snd_soc_dpcm *dpcm;
2791 struct snd_soc_dai *dai;
2792
2793 for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2794
2795 struct snd_soc_pcm_runtime *be = dpcm->be;
2796 int i;
2797
2798 if (be->dai_link->ignore_suspend)
2799 continue;
2800
2801 for_each_rtd_codec_dai(be, i, dai) {
2802 struct snd_soc_dai_driver *drv = dai->driver;
2803
2804 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2805 be->dai_link->name);
2806
2807 if (drv->ops && drv->ops->digital_mute &&
2808 dai->playback_active)
2809 drv->ops->digital_mute(dai, mute);
2810 }
2811 }
2812
2813 return 0;
2814 }
2815
2816 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2817 {
2818 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2819 struct snd_soc_dpcm *dpcm;
2820 struct snd_soc_dapm_widget_list *list;
2821 int ret;
2822 int stream = fe_substream->stream;
2823
2824 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2825 fe->dpcm[stream].runtime = fe_substream->runtime;
2826
2827 ret = dpcm_path_get(fe, stream, &list);
2828 if (ret < 0) {
2829 mutex_unlock(&fe->card->mutex);
2830 return ret;
2831 } else if (ret == 0) {
2832 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2833 fe->dai_link->name, stream ? "capture" : "playback");
2834 }
2835
2836 /* calculate valid and active FE <-> BE dpcms */
2837 dpcm_process_paths(fe, stream, &list, 1);
2838
2839 ret = dpcm_fe_dai_startup(fe_substream);
2840 if (ret < 0) {
2841 /* clean up all links */
2842 for_each_dpcm_be(fe, stream, dpcm)
2843 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2844
2845 dpcm_be_disconnect(fe, stream);
2846 fe->dpcm[stream].runtime = NULL;
2847 }
2848
2849 dpcm_clear_pending_state(fe, stream);
2850 dpcm_path_put(&list);
2851 mutex_unlock(&fe->card->mutex);
2852 return ret;
2853 }
2854
2855 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2856 {
2857 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2858 struct snd_soc_dpcm *dpcm;
2859 int stream = fe_substream->stream, ret;
2860
2861 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2862 ret = dpcm_fe_dai_shutdown(fe_substream);
2863
2864 /* mark FE's links ready to prune */
2865 for_each_dpcm_be(fe, stream, dpcm)
2866 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2867
2868 dpcm_be_disconnect(fe, stream);
2869
2870 fe->dpcm[stream].runtime = NULL;
2871 mutex_unlock(&fe->card->mutex);
2872 return ret;
2873 }
2874
2875 /* create a new pcm */
2876 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2877 {
2878 struct snd_soc_dai *codec_dai;
2879 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2880 struct snd_soc_component *component;
2881 struct snd_pcm *pcm;
2882 char new_name[64];
2883 int ret = 0, playback = 0, capture = 0;
2884 int i;
2885
2886 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2887 playback = rtd->dai_link->dpcm_playback;
2888 capture = rtd->dai_link->dpcm_capture;
2889 } else {
2890 /* Adapt stream for codec2codec links */
2891 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
2892 &cpu_dai->driver->playback : &cpu_dai->driver->capture;
2893 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
2894 &cpu_dai->driver->capture : &cpu_dai->driver->playback;
2895
2896 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2897 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2898 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
2899 playback = 1;
2900 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2901 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
2902 capture = 1;
2903 }
2904
2905 capture = capture && cpu_capture->channels_min;
2906 playback = playback && cpu_playback->channels_min;
2907 }
2908
2909 if (rtd->dai_link->playback_only) {
2910 playback = 1;
2911 capture = 0;
2912 }
2913
2914 if (rtd->dai_link->capture_only) {
2915 playback = 0;
2916 capture = 1;
2917 }
2918
2919 /* create the PCM */
2920 if (rtd->dai_link->params) {
2921 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2922 rtd->dai_link->stream_name);
2923
2924 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2925 playback, capture, &pcm);
2926 } else if (rtd->dai_link->no_pcm) {
2927 snprintf(new_name, sizeof(new_name), "(%s)",
2928 rtd->dai_link->stream_name);
2929
2930 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2931 playback, capture, &pcm);
2932 } else {
2933 if (rtd->dai_link->dynamic)
2934 snprintf(new_name, sizeof(new_name), "%s (*)",
2935 rtd->dai_link->stream_name);
2936 else
2937 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2938 rtd->dai_link->stream_name,
2939 (rtd->num_codecs > 1) ?
2940 "multicodec" : rtd->codec_dai->name, num);
2941
2942 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2943 capture, &pcm);
2944 }
2945 if (ret < 0) {
2946 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2947 rtd->dai_link->name);
2948 return ret;
2949 }
2950 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2951
2952 /* DAPM dai link stream work */
2953 if (rtd->dai_link->params)
2954 rtd->close_delayed_work_func = codec2codec_close_delayed_work;
2955 else
2956 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
2957
2958 pcm->nonatomic = rtd->dai_link->nonatomic;
2959 rtd->pcm = pcm;
2960 pcm->private_data = rtd;
2961
2962 if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2963 if (playback)
2964 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2965 if (capture)
2966 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2967 goto out;
2968 }
2969
2970 /* ASoC PCM operations */
2971 if (rtd->dai_link->dynamic) {
2972 rtd->ops.open = dpcm_fe_dai_open;
2973 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2974 rtd->ops.prepare = dpcm_fe_dai_prepare;
2975 rtd->ops.trigger = dpcm_fe_dai_trigger;
2976 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2977 rtd->ops.close = dpcm_fe_dai_close;
2978 rtd->ops.pointer = soc_pcm_pointer;
2979 } else {
2980 rtd->ops.open = soc_pcm_open;
2981 rtd->ops.hw_params = soc_pcm_hw_params;
2982 rtd->ops.prepare = soc_pcm_prepare;
2983 rtd->ops.trigger = soc_pcm_trigger;
2984 rtd->ops.hw_free = soc_pcm_hw_free;
2985 rtd->ops.close = soc_pcm_close;
2986 rtd->ops.pointer = soc_pcm_pointer;
2987 }
2988
2989 for_each_rtd_components(rtd, i, component) {
2990 const struct snd_soc_component_driver *drv = component->driver;
2991
2992 if (drv->ioctl)
2993 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
2994 if (drv->sync_stop)
2995 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
2996 if (drv->copy_user)
2997 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
2998 if (drv->page)
2999 rtd->ops.page = snd_soc_pcm_component_page;
3000 if (drv->mmap)
3001 rtd->ops.mmap = snd_soc_pcm_component_mmap;
3002 }
3003
3004 if (playback)
3005 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3006
3007 if (capture)
3008 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3009
3010 ret = snd_soc_pcm_component_new(rtd);
3011 if (ret < 0) {
3012 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
3013 return ret;
3014 }
3015
3016 pcm->no_device_suspend = true;
3017 out:
3018 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3019 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3020 cpu_dai->name);
3021 return ret;
3022 }
3023
3024 /* is the current PCM operation for this FE ? */
3025 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3026 {
3027 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3028 return 1;
3029 return 0;
3030 }
3031 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3032
3033 /* is the current PCM operation for this BE ? */
3034 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3035 struct snd_soc_pcm_runtime *be, int stream)
3036 {
3037 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3038 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3039 be->dpcm[stream].runtime_update))
3040 return 1;
3041 return 0;
3042 }
3043 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3044
3045 /* get the substream for this BE */
3046 struct snd_pcm_substream *
3047 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3048 {
3049 return be->pcm->streams[stream].substream;
3050 }
3051 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3052
3053 /* get the BE runtime state */
3054 enum snd_soc_dpcm_state
3055 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3056 {
3057 return be->dpcm[stream].state;
3058 }
3059 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3060
3061 /* set the BE runtime state */
3062 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3063 int stream, enum snd_soc_dpcm_state state)
3064 {
3065 be->dpcm[stream].state = state;
3066 }
3067 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3068
3069 /*
3070 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3071 * are not running, paused or suspended for the specified stream direction.
3072 */
3073 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3074 struct snd_soc_pcm_runtime *be, int stream)
3075 {
3076 struct snd_soc_dpcm *dpcm;
3077 int state;
3078 int ret = 1;
3079 unsigned long flags;
3080
3081 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3082 for_each_dpcm_fe(be, stream, dpcm) {
3083
3084 if (dpcm->fe == fe)
3085 continue;
3086
3087 state = dpcm->fe->dpcm[stream].state;
3088 if (state == SND_SOC_DPCM_STATE_START ||
3089 state == SND_SOC_DPCM_STATE_PAUSED ||
3090 state == SND_SOC_DPCM_STATE_SUSPEND) {
3091 ret = 0;
3092 break;
3093 }
3094 }
3095 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3096
3097 /* it's safe to free/stop this BE DAI */
3098 return ret;
3099 }
3100 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3101
3102 /*
3103 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3104 * running, paused or suspended for the specified stream direction.
3105 */
3106 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3107 struct snd_soc_pcm_runtime *be, int stream)
3108 {
3109 struct snd_soc_dpcm *dpcm;
3110 int state;
3111 int ret = 1;
3112 unsigned long flags;
3113
3114 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3115 for_each_dpcm_fe(be, stream, dpcm) {
3116
3117 if (dpcm->fe == fe)
3118 continue;
3119
3120 state = dpcm->fe->dpcm[stream].state;
3121 if (state == SND_SOC_DPCM_STATE_START ||
3122 state == SND_SOC_DPCM_STATE_PAUSED ||
3123 state == SND_SOC_DPCM_STATE_SUSPEND ||
3124 state == SND_SOC_DPCM_STATE_PREPARE) {
3125 ret = 0;
3126 break;
3127 }
3128 }
3129 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3130
3131 /* it's safe to change hw_params */
3132 return ret;
3133 }
3134 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3135
3136 #ifdef CONFIG_DEBUG_FS
3137 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3138 {
3139 switch (state) {
3140 case SND_SOC_DPCM_STATE_NEW:
3141 return "new";
3142 case SND_SOC_DPCM_STATE_OPEN:
3143 return "open";
3144 case SND_SOC_DPCM_STATE_HW_PARAMS:
3145 return "hw_params";
3146 case SND_SOC_DPCM_STATE_PREPARE:
3147 return "prepare";
3148 case SND_SOC_DPCM_STATE_START:
3149 return "start";
3150 case SND_SOC_DPCM_STATE_STOP:
3151 return "stop";
3152 case SND_SOC_DPCM_STATE_SUSPEND:
3153 return "suspend";
3154 case SND_SOC_DPCM_STATE_PAUSED:
3155 return "paused";
3156 case SND_SOC_DPCM_STATE_HW_FREE:
3157 return "hw_free";
3158 case SND_SOC_DPCM_STATE_CLOSE:
3159 return "close";
3160 }
3161
3162 return "unknown";
3163 }
3164
3165 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3166 int stream, char *buf, size_t size)
3167 {
3168 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3169 struct snd_soc_dpcm *dpcm;
3170 ssize_t offset = 0;
3171 unsigned long flags;
3172
3173 /* FE state */
3174 offset += snprintf(buf + offset, size - offset,
3175 "[%s - %s]\n", fe->dai_link->name,
3176 stream ? "Capture" : "Playback");
3177
3178 offset += snprintf(buf + offset, size - offset, "State: %s\n",
3179 dpcm_state_string(fe->dpcm[stream].state));
3180
3181 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3182 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3183 offset += snprintf(buf + offset, size - offset,
3184 "Hardware Params: "
3185 "Format = %s, Channels = %d, Rate = %d\n",
3186 snd_pcm_format_name(params_format(params)),
3187 params_channels(params),
3188 params_rate(params));
3189
3190 /* BEs state */
3191 offset += snprintf(buf + offset, size - offset, "Backends:\n");
3192
3193 if (list_empty(&fe->dpcm[stream].be_clients)) {
3194 offset += snprintf(buf + offset, size - offset,
3195 " No active DSP links\n");
3196 goto out;
3197 }
3198
3199 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3200 for_each_dpcm_be(fe, stream, dpcm) {
3201 struct snd_soc_pcm_runtime *be = dpcm->be;
3202 params = &dpcm->hw_params;
3203
3204 offset += snprintf(buf + offset, size - offset,
3205 "- %s\n", be->dai_link->name);
3206
3207 offset += snprintf(buf + offset, size - offset,
3208 " State: %s\n",
3209 dpcm_state_string(be->dpcm[stream].state));
3210
3211 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3212 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3213 offset += snprintf(buf + offset, size - offset,
3214 " Hardware Params: "
3215 "Format = %s, Channels = %d, Rate = %d\n",
3216 snd_pcm_format_name(params_format(params)),
3217 params_channels(params),
3218 params_rate(params));
3219 }
3220 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3221 out:
3222 return offset;
3223 }
3224
3225 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3226 size_t count, loff_t *ppos)
3227 {
3228 struct snd_soc_pcm_runtime *fe = file->private_data;
3229 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3230 char *buf;
3231
3232 buf = kmalloc(out_count, GFP_KERNEL);
3233 if (!buf)
3234 return -ENOMEM;
3235
3236 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
3237 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3238 buf + offset, out_count - offset);
3239
3240 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
3241 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3242 buf + offset, out_count - offset);
3243
3244 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3245
3246 kfree(buf);
3247 return ret;
3248 }
3249
3250 static const struct file_operations dpcm_state_fops = {
3251 .open = simple_open,
3252 .read = dpcm_state_read_file,
3253 .llseek = default_llseek,
3254 };
3255
3256 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3257 {
3258 if (!rtd->dai_link)
3259 return;
3260
3261 if (!rtd->dai_link->dynamic)
3262 return;
3263
3264 if (!rtd->card->debugfs_card_root)
3265 return;
3266
3267 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3268 rtd->card->debugfs_card_root);
3269
3270 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3271 rtd, &dpcm_state_fops);
3272 }
3273 #endif
Linux with added FPC-III support