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media: v4l: rcar_fdp1: Change platform dependency to ARCH_RENESAS
[linux/fpc-iii.git] / sound / soc / soc-pcm.c
blob5e7ae47a9658c3200241007b02d11b63bb45d429
1 /*
2 * soc-pcm.c -- ALSA SoC PCM
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
8 *
9 * Authors: Liam Girdwood <lrg@ti.com>
10 * Mark Brown <broonie@opensource.wolfsonmicro.com>
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 *
17 */
18
19 #include <linux/kernel.h>
20 #include <linux/init.h>
21 #include <linux/delay.h>
22 #include <linux/pinctrl/consumer.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/slab.h>
25 #include <linux/workqueue.h>
26 #include <linux/export.h>
27 #include <linux/debugfs.h>
28 #include <sound/core.h>
29 #include <sound/pcm.h>
30 #include <sound/pcm_params.h>
31 #include <sound/soc.h>
32 #include <sound/soc-dpcm.h>
33 #include <sound/initval.h>
34
35 #define DPCM_MAX_BE_USERS 8
36
37 /*
38 * snd_soc_dai_stream_valid() - check if a DAI supports the given stream
39 *
40 * Returns true if the DAI supports the indicated stream type.
41 */
42 static bool snd_soc_dai_stream_valid(struct snd_soc_dai *dai, int stream)
43 {
44 struct snd_soc_pcm_stream *codec_stream;
45
46 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
47 codec_stream = &dai->driver->playback;
48 else
49 codec_stream = &dai->driver->capture;
50
51 /* If the codec specifies any rate at all, it supports the stream. */
52 return codec_stream->rates;
53 }
54
55 /**
56 * snd_soc_runtime_activate() - Increment active count for PCM runtime components
57 * @rtd: ASoC PCM runtime that is activated
58 * @stream: Direction of the PCM stream
59 *
60 * Increments the active count for all the DAIs and components attached to a PCM
61 * runtime. Should typically be called when a stream is opened.
62 *
63 * Must be called with the rtd->pcm_mutex being held
64 */
65 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
66 {
67 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
68 int i;
69
70 lockdep_assert_held(&rtd->pcm_mutex);
71
72 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
73 cpu_dai->playback_active++;
74 for (i = 0; i < rtd->num_codecs; i++)
75 rtd->codec_dais[i]->playback_active++;
76 } else {
77 cpu_dai->capture_active++;
78 for (i = 0; i < rtd->num_codecs; i++)
79 rtd->codec_dais[i]->capture_active++;
80 }
81
82 cpu_dai->active++;
83 cpu_dai->component->active++;
84 for (i = 0; i < rtd->num_codecs; i++) {
85 rtd->codec_dais[i]->active++;
86 rtd->codec_dais[i]->component->active++;
87 }
88 }
89
90 /**
91 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
92 * @rtd: ASoC PCM runtime that is deactivated
93 * @stream: Direction of the PCM stream
94 *
95 * Decrements the active count for all the DAIs and components attached to a PCM
96 * runtime. Should typically be called when a stream is closed.
97 *
98 * Must be called with the rtd->pcm_mutex being held
99 */
100 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
101 {
102 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
103 int i;
104
105 lockdep_assert_held(&rtd->pcm_mutex);
106
107 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
108 cpu_dai->playback_active--;
109 for (i = 0; i < rtd->num_codecs; i++)
110 rtd->codec_dais[i]->playback_active--;
111 } else {
112 cpu_dai->capture_active--;
113 for (i = 0; i < rtd->num_codecs; i++)
114 rtd->codec_dais[i]->capture_active--;
115 }
116
117 cpu_dai->active--;
118 cpu_dai->component->active--;
119 for (i = 0; i < rtd->num_codecs; i++) {
120 rtd->codec_dais[i]->component->active--;
121 rtd->codec_dais[i]->active--;
122 }
123 }
124
125 /**
126 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
127 * @rtd: The ASoC PCM runtime that should be checked.
128 *
129 * This function checks whether the power down delay should be ignored for a
130 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
131 * been configured to ignore the delay, or if none of the components benefits
132 * from having the delay.
133 */
134 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
135 {
136 struct snd_soc_rtdcom_list *rtdcom;
137 struct snd_soc_component *component;
138 bool ignore = true;
139
140 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
141 return true;
142
143 for_each_rtdcom(rtd, rtdcom) {
144 component = rtdcom->component;
145
146 ignore &= !component->driver->use_pmdown_time;
147 }
148
149 return ignore;
150 }
151
152 /**
153 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
154 * @substream: the pcm substream
155 * @hw: the hardware parameters
156 *
157 * Sets the substream runtime hardware parameters.
158 */
159 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
160 const struct snd_pcm_hardware *hw)
161 {
162 struct snd_pcm_runtime *runtime = substream->runtime;
163 runtime->hw.info = hw->info;
164 runtime->hw.formats = hw->formats;
165 runtime->hw.period_bytes_min = hw->period_bytes_min;
166 runtime->hw.period_bytes_max = hw->period_bytes_max;
167 runtime->hw.periods_min = hw->periods_min;
168 runtime->hw.periods_max = hw->periods_max;
169 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
170 runtime->hw.fifo_size = hw->fifo_size;
171 return 0;
172 }
173 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
174
175 /* DPCM stream event, send event to FE and all active BEs. */
176 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
177 int event)
178 {
179 struct snd_soc_dpcm *dpcm;
180
181 list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
182
183 struct snd_soc_pcm_runtime *be = dpcm->be;
184
185 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
186 be->dai_link->name, event, dir);
187
188 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
189 (be->dpcm[dir].users >= 1))
190 continue;
191
192 snd_soc_dapm_stream_event(be, dir, event);
193 }
194
195 snd_soc_dapm_stream_event(fe, dir, event);
196
197 return 0;
198 }
199
200 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
201 struct snd_soc_dai *soc_dai)
202 {
203 struct snd_soc_pcm_runtime *rtd = substream->private_data;
204 int ret;
205
206 if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
207 rtd->dai_link->symmetric_rates)) {
208 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
209 soc_dai->rate);
210
211 ret = snd_pcm_hw_constraint_single(substream->runtime,
212 SNDRV_PCM_HW_PARAM_RATE,
213 soc_dai->rate);
214 if (ret < 0) {
215 dev_err(soc_dai->dev,
216 "ASoC: Unable to apply rate constraint: %d\n",
217 ret);
218 return ret;
219 }
220 }
221
222 if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
223 rtd->dai_link->symmetric_channels)) {
224 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
225 soc_dai->channels);
226
227 ret = snd_pcm_hw_constraint_single(substream->runtime,
228 SNDRV_PCM_HW_PARAM_CHANNELS,
229 soc_dai->channels);
230 if (ret < 0) {
231 dev_err(soc_dai->dev,
232 "ASoC: Unable to apply channel symmetry constraint: %d\n",
233 ret);
234 return ret;
235 }
236 }
237
238 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
239 rtd->dai_link->symmetric_samplebits)) {
240 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
241 soc_dai->sample_bits);
242
243 ret = snd_pcm_hw_constraint_single(substream->runtime,
244 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
245 soc_dai->sample_bits);
246 if (ret < 0) {
247 dev_err(soc_dai->dev,
248 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
249 ret);
250 return ret;
251 }
252 }
253
254 return 0;
255 }
256
257 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
258 struct snd_pcm_hw_params *params)
259 {
260 struct snd_soc_pcm_runtime *rtd = substream->private_data;
261 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
262 unsigned int rate, channels, sample_bits, symmetry, i;
263
264 rate = params_rate(params);
265 channels = params_channels(params);
266 sample_bits = snd_pcm_format_physical_width(params_format(params));
267
268 /* reject unmatched parameters when applying symmetry */
269 symmetry = cpu_dai->driver->symmetric_rates ||
270 rtd->dai_link->symmetric_rates;
271
272 for (i = 0; i < rtd->num_codecs; i++)
273 symmetry |= rtd->codec_dais[i]->driver->symmetric_rates;
274
275 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
276 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
277 cpu_dai->rate, rate);
278 return -EINVAL;
279 }
280
281 symmetry = cpu_dai->driver->symmetric_channels ||
282 rtd->dai_link->symmetric_channels;
283
284 for (i = 0; i < rtd->num_codecs; i++)
285 symmetry |= rtd->codec_dais[i]->driver->symmetric_channels;
286
287 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
288 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
289 cpu_dai->channels, channels);
290 return -EINVAL;
291 }
292
293 symmetry = cpu_dai->driver->symmetric_samplebits ||
294 rtd->dai_link->symmetric_samplebits;
295
296 for (i = 0; i < rtd->num_codecs; i++)
297 symmetry |= rtd->codec_dais[i]->driver->symmetric_samplebits;
298
299 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
300 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
301 cpu_dai->sample_bits, sample_bits);
302 return -EINVAL;
303 }
304
305 return 0;
306 }
307
308 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
309 {
310 struct snd_soc_pcm_runtime *rtd = substream->private_data;
311 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
312 struct snd_soc_dai_link *link = rtd->dai_link;
313 unsigned int symmetry, i;
314
315 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
316 cpu_driver->symmetric_channels || link->symmetric_channels ||
317 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
318
319 for (i = 0; i < rtd->num_codecs; i++)
320 symmetry = symmetry ||
321 rtd->codec_dais[i]->driver->symmetric_rates ||
322 rtd->codec_dais[i]->driver->symmetric_channels ||
323 rtd->codec_dais[i]->driver->symmetric_samplebits;
324
325 return symmetry;
326 }
327
328 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
329 {
330 struct snd_soc_pcm_runtime *rtd = substream->private_data;
331 int ret;
332
333 if (!bits)
334 return;
335
336 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
337 if (ret != 0)
338 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
339 bits, ret);
340 }
341
342 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
343 {
344 struct snd_soc_pcm_runtime *rtd = substream->private_data;
345 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
346 struct snd_soc_dai *codec_dai;
347 int i;
348 unsigned int bits = 0, cpu_bits;
349
350 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
351 for (i = 0; i < rtd->num_codecs; i++) {
352 codec_dai = rtd->codec_dais[i];
353 if (codec_dai->driver->playback.sig_bits == 0) {
354 bits = 0;
355 break;
356 }
357 bits = max(codec_dai->driver->playback.sig_bits, bits);
358 }
359 cpu_bits = cpu_dai->driver->playback.sig_bits;
360 } else {
361 for (i = 0; i < rtd->num_codecs; i++) {
362 codec_dai = rtd->codec_dais[i];
363 if (codec_dai->driver->capture.sig_bits == 0) {
364 bits = 0;
365 break;
366 }
367 bits = max(codec_dai->driver->capture.sig_bits, bits);
368 }
369 cpu_bits = cpu_dai->driver->capture.sig_bits;
370 }
371
372 soc_pcm_set_msb(substream, bits);
373 soc_pcm_set_msb(substream, cpu_bits);
374 }
375
376 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
377 {
378 struct snd_pcm_runtime *runtime = substream->runtime;
379 struct snd_pcm_hardware *hw = &runtime->hw;
380 struct snd_soc_pcm_runtime *rtd = substream->private_data;
381 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
382 struct snd_soc_dai_driver *codec_dai_drv;
383 struct snd_soc_pcm_stream *codec_stream;
384 struct snd_soc_pcm_stream *cpu_stream;
385 unsigned int chan_min = 0, chan_max = UINT_MAX;
386 unsigned int rate_min = 0, rate_max = UINT_MAX;
387 unsigned int rates = UINT_MAX;
388 u64 formats = ULLONG_MAX;
389 int i;
390
391 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
392 cpu_stream = &cpu_dai_drv->playback;
393 else
394 cpu_stream = &cpu_dai_drv->capture;
395
396 /* first calculate min/max only for CODECs in the DAI link */
397 for (i = 0; i < rtd->num_codecs; i++) {
398
399 /*
400 * Skip CODECs which don't support the current stream type.
401 * Otherwise, since the rate, channel, and format values will
402 * zero in that case, we would have no usable settings left,
403 * causing the resulting setup to fail.
404 * At least one CODEC should match, otherwise we should have
405 * bailed out on a higher level, since there would be no
406 * CODEC to support the transfer direction in that case.
407 */
408 if (!snd_soc_dai_stream_valid(rtd->codec_dais[i],
409 substream->stream))
410 continue;
411
412 codec_dai_drv = rtd->codec_dais[i]->driver;
413 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
414 codec_stream = &codec_dai_drv->playback;
415 else
416 codec_stream = &codec_dai_drv->capture;
417 chan_min = max(chan_min, codec_stream->channels_min);
418 chan_max = min(chan_max, codec_stream->channels_max);
419 rate_min = max(rate_min, codec_stream->rate_min);
420 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
421 formats &= codec_stream->formats;
422 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
423 }
424
425 /*
426 * chan min/max cannot be enforced if there are multiple CODEC DAIs
427 * connected to a single CPU DAI, use CPU DAI's directly and let
428 * channel allocation be fixed up later
429 */
430 if (rtd->num_codecs > 1) {
431 chan_min = cpu_stream->channels_min;
432 chan_max = cpu_stream->channels_max;
433 }
434
435 hw->channels_min = max(chan_min, cpu_stream->channels_min);
436 hw->channels_max = min(chan_max, cpu_stream->channels_max);
437 if (hw->formats)
438 hw->formats &= formats & cpu_stream->formats;
439 else
440 hw->formats = formats & cpu_stream->formats;
441 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
442
443 snd_pcm_limit_hw_rates(runtime);
444
445 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
446 hw->rate_min = max(hw->rate_min, rate_min);
447 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
448 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
449 }
450
451 /*
452 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
453 * then initialized and any private data can be allocated. This also calls
454 * startup for the cpu DAI, component, machine and codec DAI.
455 */
456 static int soc_pcm_open(struct snd_pcm_substream *substream)
457 {
458 struct snd_soc_pcm_runtime *rtd = substream->private_data;
459 struct snd_pcm_runtime *runtime = substream->runtime;
460 struct snd_soc_component *component;
461 struct snd_soc_rtdcom_list *rtdcom;
462 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
463 struct snd_soc_dai *codec_dai;
464 const char *codec_dai_name = "multicodec";
465 int i, ret = 0, __ret;
466
467 pinctrl_pm_select_default_state(cpu_dai->dev);
468 for (i = 0; i < rtd->num_codecs; i++)
469 pinctrl_pm_select_default_state(rtd->codec_dais[i]->dev);
470
471 for_each_rtdcom(rtd, rtdcom) {
472 component = rtdcom->component;
473
474 pm_runtime_get_sync(component->dev);
475 }
476
477 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
478
479 /* startup the audio subsystem */
480 if (cpu_dai->driver->ops->startup) {
481 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
482 if (ret < 0) {
483 dev_err(cpu_dai->dev, "ASoC: can't open interface"
484 " %s: %d\n", cpu_dai->name, ret);
485 goto out;
486 }
487 }
488
489 ret = 0;
490 for_each_rtdcom(rtd, rtdcom) {
491 component = rtdcom->component;
492
493 if (!component->driver->ops ||
494 !component->driver->ops->open)
495 continue;
496
497 __ret = component->driver->ops->open(substream);
498 if (__ret < 0) {
499 dev_err(component->dev,
500 "ASoC: can't open component %s: %d\n",
501 component->name, __ret);
502 ret = __ret;
503 }
504 }
505 if (ret < 0)
506 goto component_err;
507
508 for (i = 0; i < rtd->num_codecs; i++) {
509 codec_dai = rtd->codec_dais[i];
510 if (codec_dai->driver->ops->startup) {
511 ret = codec_dai->driver->ops->startup(substream,
512 codec_dai);
513 if (ret < 0) {
514 dev_err(codec_dai->dev,
515 "ASoC: can't open codec %s: %d\n",
516 codec_dai->name, ret);
517 goto codec_dai_err;
518 }
519 }
520
521 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
522 codec_dai->tx_mask = 0;
523 else
524 codec_dai->rx_mask = 0;
525 }
526
527 if (rtd->dai_link->ops->startup) {
528 ret = rtd->dai_link->ops->startup(substream);
529 if (ret < 0) {
530 pr_err("ASoC: %s startup failed: %d\n",
531 rtd->dai_link->name, ret);
532 goto machine_err;
533 }
534 }
535
536 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
537 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
538 goto dynamic;
539
540 /* Check that the codec and cpu DAIs are compatible */
541 soc_pcm_init_runtime_hw(substream);
542
543 if (rtd->num_codecs == 1)
544 codec_dai_name = rtd->codec_dai->name;
545
546 if (soc_pcm_has_symmetry(substream))
547 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
548
549 ret = -EINVAL;
550 if (!runtime->hw.rates) {
551 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
552 codec_dai_name, cpu_dai->name);
553 goto config_err;
554 }
555 if (!runtime->hw.formats) {
556 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
557 codec_dai_name, cpu_dai->name);
558 goto config_err;
559 }
560 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
561 runtime->hw.channels_min > runtime->hw.channels_max) {
562 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
563 codec_dai_name, cpu_dai->name);
564 goto config_err;
565 }
566
567 soc_pcm_apply_msb(substream);
568
569 /* Symmetry only applies if we've already got an active stream. */
570 if (cpu_dai->active) {
571 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
572 if (ret != 0)
573 goto config_err;
574 }
575
576 for (i = 0; i < rtd->num_codecs; i++) {
577 if (rtd->codec_dais[i]->active) {
578 ret = soc_pcm_apply_symmetry(substream,
579 rtd->codec_dais[i]);
580 if (ret != 0)
581 goto config_err;
582 }
583 }
584
585 pr_debug("ASoC: %s <-> %s info:\n",
586 codec_dai_name, cpu_dai->name);
587 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
588 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
589 runtime->hw.channels_max);
590 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
591 runtime->hw.rate_max);
592
593 dynamic:
594
595 snd_soc_runtime_activate(rtd, substream->stream);
596
597 mutex_unlock(&rtd->pcm_mutex);
598 return 0;
599
600 config_err:
601 if (rtd->dai_link->ops->shutdown)
602 rtd->dai_link->ops->shutdown(substream);
603
604 machine_err:
605 i = rtd->num_codecs;
606
607 codec_dai_err:
608 while (--i >= 0) {
609 codec_dai = rtd->codec_dais[i];
610 if (codec_dai->driver->ops->shutdown)
611 codec_dai->driver->ops->shutdown(substream, codec_dai);
612 }
613
614 component_err:
615 for_each_rtdcom(rtd, rtdcom) {
616 component = rtdcom->component;
617
618 if (!component->driver->ops ||
619 !component->driver->ops->close)
620 continue;
621
622 component->driver->ops->close(substream);
623 }
624
625 if (cpu_dai->driver->ops->shutdown)
626 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
627 out:
628 mutex_unlock(&rtd->pcm_mutex);
629
630 for_each_rtdcom(rtd, rtdcom) {
631 component = rtdcom->component;
632
633 pm_runtime_mark_last_busy(component->dev);
634 pm_runtime_put_autosuspend(component->dev);
635 }
636
637 for (i = 0; i < rtd->num_codecs; i++) {
638 if (!rtd->codec_dais[i]->active)
639 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
640 }
641 if (!cpu_dai->active)
642 pinctrl_pm_select_sleep_state(cpu_dai->dev);
643
644 return ret;
645 }
646
647 /*
648 * Power down the audio subsystem pmdown_time msecs after close is called.
649 * This is to ensure there are no pops or clicks in between any music tracks
650 * due to DAPM power cycling.
651 */
652 static void close_delayed_work(struct work_struct *work)
653 {
654 struct snd_soc_pcm_runtime *rtd =
655 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
656 struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
657
658 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
659
660 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
661 codec_dai->driver->playback.stream_name,
662 codec_dai->playback_active ? "active" : "inactive",
663 rtd->pop_wait ? "yes" : "no");
664
665 /* are we waiting on this codec DAI stream */
666 if (rtd->pop_wait == 1) {
667 rtd->pop_wait = 0;
668 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
669 SND_SOC_DAPM_STREAM_STOP);
670 }
671
672 mutex_unlock(&rtd->pcm_mutex);
673 }
674
675 /*
676 * Called by ALSA when a PCM substream is closed. Private data can be
677 * freed here. The cpu DAI, codec DAI, machine and components are also
678 * shutdown.
679 */
680 static int soc_pcm_close(struct snd_pcm_substream *substream)
681 {
682 struct snd_soc_pcm_runtime *rtd = substream->private_data;
683 struct snd_soc_component *component;
684 struct snd_soc_rtdcom_list *rtdcom;
685 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
686 struct snd_soc_dai *codec_dai;
687 int i;
688
689 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
690
691 snd_soc_runtime_deactivate(rtd, substream->stream);
692
693 /* clear the corresponding DAIs rate when inactive */
694 if (!cpu_dai->active)
695 cpu_dai->rate = 0;
696
697 for (i = 0; i < rtd->num_codecs; i++) {
698 codec_dai = rtd->codec_dais[i];
699 if (!codec_dai->active)
700 codec_dai->rate = 0;
701 }
702
703 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
704
705 if (cpu_dai->driver->ops->shutdown)
706 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
707
708 for (i = 0; i < rtd->num_codecs; i++) {
709 codec_dai = rtd->codec_dais[i];
710 if (codec_dai->driver->ops->shutdown)
711 codec_dai->driver->ops->shutdown(substream, codec_dai);
712 }
713
714 if (rtd->dai_link->ops->shutdown)
715 rtd->dai_link->ops->shutdown(substream);
716
717 for_each_rtdcom(rtd, rtdcom) {
718 component = rtdcom->component;
719
720 if (!component->driver->ops ||
721 !component->driver->ops->close)
722 continue;
723
724 component->driver->ops->close(substream);
725 }
726
727 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
728 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
729 /* powered down playback stream now */
730 snd_soc_dapm_stream_event(rtd,
731 SNDRV_PCM_STREAM_PLAYBACK,
732 SND_SOC_DAPM_STREAM_STOP);
733 } else {
734 /* start delayed pop wq here for playback streams */
735 rtd->pop_wait = 1;
736 queue_delayed_work(system_power_efficient_wq,
737 &rtd->delayed_work,
738 msecs_to_jiffies(rtd->pmdown_time));
739 }
740 } else {
741 /* capture streams can be powered down now */
742 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
743 SND_SOC_DAPM_STREAM_STOP);
744 }
745
746 mutex_unlock(&rtd->pcm_mutex);
747
748 for_each_rtdcom(rtd, rtdcom) {
749 component = rtdcom->component;
750
751 pm_runtime_mark_last_busy(component->dev);
752 pm_runtime_put_autosuspend(component->dev);
753 }
754
755 for (i = 0; i < rtd->num_codecs; i++) {
756 if (!rtd->codec_dais[i]->active)
757 pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
758 }
759 if (!cpu_dai->active)
760 pinctrl_pm_select_sleep_state(cpu_dai->dev);
761
762 return 0;
763 }
764
765 /*
766 * Called by ALSA when the PCM substream is prepared, can set format, sample
767 * rate, etc. This function is non atomic and can be called multiple times,
768 * it can refer to the runtime info.
769 */
770 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
771 {
772 struct snd_soc_pcm_runtime *rtd = substream->private_data;
773 struct snd_soc_component *component;
774 struct snd_soc_rtdcom_list *rtdcom;
775 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
776 struct snd_soc_dai *codec_dai;
777 int i, ret = 0;
778
779 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
780
781 if (rtd->dai_link->ops->prepare) {
782 ret = rtd->dai_link->ops->prepare(substream);
783 if (ret < 0) {
784 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
785 " %d\n", ret);
786 goto out;
787 }
788 }
789
790 for_each_rtdcom(rtd, rtdcom) {
791 component = rtdcom->component;
792
793 if (!component->driver->ops ||
794 !component->driver->ops->prepare)
795 continue;
796
797 ret = component->driver->ops->prepare(substream);
798 if (ret < 0) {
799 dev_err(component->dev,
800 "ASoC: platform prepare error: %d\n", ret);
801 goto out;
802 }
803 }
804
805 for (i = 0; i < rtd->num_codecs; i++) {
806 codec_dai = rtd->codec_dais[i];
807 if (codec_dai->driver->ops->prepare) {
808 ret = codec_dai->driver->ops->prepare(substream,
809 codec_dai);
810 if (ret < 0) {
811 dev_err(codec_dai->dev,
812 "ASoC: codec DAI prepare error: %d\n",
813 ret);
814 goto out;
815 }
816 }
817 }
818
819 if (cpu_dai->driver->ops->prepare) {
820 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
821 if (ret < 0) {
822 dev_err(cpu_dai->dev,
823 "ASoC: cpu DAI prepare error: %d\n", ret);
824 goto out;
825 }
826 }
827
828 /* cancel any delayed stream shutdown that is pending */
829 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
830 rtd->pop_wait) {
831 rtd->pop_wait = 0;
832 cancel_delayed_work(&rtd->delayed_work);
833 }
834
835 snd_soc_dapm_stream_event(rtd, substream->stream,
836 SND_SOC_DAPM_STREAM_START);
837
838 for (i = 0; i < rtd->num_codecs; i++)
839 snd_soc_dai_digital_mute(rtd->codec_dais[i], 0,
840 substream->stream);
841 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
842
843 out:
844 mutex_unlock(&rtd->pcm_mutex);
845 return ret;
846 }
847
848 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
849 unsigned int mask)
850 {
851 struct snd_interval *interval;
852 int channels = hweight_long(mask);
853
854 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
855 interval->min = channels;
856 interval->max = channels;
857 }
858
859 int soc_dai_hw_params(struct snd_pcm_substream *substream,
860 struct snd_pcm_hw_params *params,
861 struct snd_soc_dai *dai)
862 {
863 int ret;
864
865 if (dai->driver->ops->hw_params) {
866 ret = dai->driver->ops->hw_params(substream, params, dai);
867 if (ret < 0) {
868 dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
869 dai->name, ret);
870 return ret;
871 }
872 }
873
874 return 0;
875 }
876
877 /*
878 * Called by ALSA when the hardware params are set by application. This
879 * function can also be called multiple times and can allocate buffers
880 * (using snd_pcm_lib_* ). It's non-atomic.
881 */
882 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
883 struct snd_pcm_hw_params *params)
884 {
885 struct snd_soc_pcm_runtime *rtd = substream->private_data;
886 struct snd_soc_component *component;
887 struct snd_soc_rtdcom_list *rtdcom;
888 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
889 int i, ret = 0, __ret;
890
891 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
892 if (rtd->dai_link->ops->hw_params) {
893 ret = rtd->dai_link->ops->hw_params(substream, params);
894 if (ret < 0) {
895 dev_err(rtd->card->dev, "ASoC: machine hw_params"
896 " failed: %d\n", ret);
897 goto out;
898 }
899 }
900
901 for (i = 0; i < rtd->num_codecs; i++) {
902 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
903 struct snd_pcm_hw_params codec_params;
904
905 /*
906 * Skip CODECs which don't support the current stream type,
907 * the idea being that if a CODEC is not used for the currently
908 * set up transfer direction, it should not need to be
909 * configured, especially since the configuration used might
910 * not even be supported by that CODEC. There may be cases
911 * however where a CODEC needs to be set up although it is
912 * actually not being used for the transfer, e.g. if a
913 * capture-only CODEC is acting as an LRCLK and/or BCLK master
914 * for the DAI link including a playback-only CODEC.
915 * If this becomes necessary, we will have to augment the
916 * machine driver setup with information on how to act, so
917 * we can do the right thing here.
918 */
919 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
920 continue;
921
922 /* copy params for each codec */
923 codec_params = *params;
924
925 /* fixup params based on TDM slot masks */
926 if (codec_dai->tx_mask)
927 soc_pcm_codec_params_fixup(&codec_params,
928 codec_dai->tx_mask);
929 if (codec_dai->rx_mask)
930 soc_pcm_codec_params_fixup(&codec_params,
931 codec_dai->rx_mask);
932
933 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
934 if(ret < 0)
935 goto codec_err;
936
937 codec_dai->rate = params_rate(&codec_params);
938 codec_dai->channels = params_channels(&codec_params);
939 codec_dai->sample_bits = snd_pcm_format_physical_width(
940 params_format(&codec_params));
941 }
942
943 ret = soc_dai_hw_params(substream, params, cpu_dai);
944 if (ret < 0)
945 goto interface_err;
946
947 ret = 0;
948 for_each_rtdcom(rtd, rtdcom) {
949 component = rtdcom->component;
950
951 if (!component->driver->ops ||
952 !component->driver->ops->hw_params)
953 continue;
954
955 __ret = component->driver->ops->hw_params(substream, params);
956 if (__ret < 0) {
957 dev_err(component->dev,
958 "ASoC: %s hw params failed: %d\n",
959 component->name, __ret);
960 ret = __ret;
961 }
962 }
963 if (ret < 0)
964 goto component_err;
965
966 /* store the parameters for each DAIs */
967 cpu_dai->rate = params_rate(params);
968 cpu_dai->channels = params_channels(params);
969 cpu_dai->sample_bits =
970 snd_pcm_format_physical_width(params_format(params));
971
972 ret = soc_pcm_params_symmetry(substream, params);
973 if (ret)
974 goto component_err;
975 out:
976 mutex_unlock(&rtd->pcm_mutex);
977 return ret;
978
979 component_err:
980 for_each_rtdcom(rtd, rtdcom) {
981 component = rtdcom->component;
982
983 if (!component->driver->ops ||
984 !component->driver->ops->hw_free)
985 continue;
986
987 component->driver->ops->hw_free(substream);
988 }
989
990 if (cpu_dai->driver->ops->hw_free)
991 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
992
993 interface_err:
994 i = rtd->num_codecs;
995
996 codec_err:
997 while (--i >= 0) {
998 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
999 if (codec_dai->driver->ops->hw_free)
1000 codec_dai->driver->ops->hw_free(substream, codec_dai);
1001 codec_dai->rate = 0;
1002 }
1003
1004 if (rtd->dai_link->ops->hw_free)
1005 rtd->dai_link->ops->hw_free(substream);
1006
1007 mutex_unlock(&rtd->pcm_mutex);
1008 return ret;
1009 }
1010
1011 /*
1012 * Frees resources allocated by hw_params, can be called multiple times
1013 */
1014 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
1015 {
1016 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1017 struct snd_soc_component *component;
1018 struct snd_soc_rtdcom_list *rtdcom;
1019 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1020 struct snd_soc_dai *codec_dai;
1021 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
1022 int i;
1023
1024 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
1025
1026 /* clear the corresponding DAIs parameters when going to be inactive */
1027 if (cpu_dai->active == 1) {
1028 cpu_dai->rate = 0;
1029 cpu_dai->channels = 0;
1030 cpu_dai->sample_bits = 0;
1031 }
1032
1033 for (i = 0; i < rtd->num_codecs; i++) {
1034 codec_dai = rtd->codec_dais[i];
1035 if (codec_dai->active == 1) {
1036 codec_dai->rate = 0;
1037 codec_dai->channels = 0;
1038 codec_dai->sample_bits = 0;
1039 }
1040 }
1041
1042 /* apply codec digital mute */
1043 for (i = 0; i < rtd->num_codecs; i++) {
1044 if ((playback && rtd->codec_dais[i]->playback_active == 1) ||
1045 (!playback && rtd->codec_dais[i]->capture_active == 1))
1046 snd_soc_dai_digital_mute(rtd->codec_dais[i], 1,
1047 substream->stream);
1048 }
1049
1050 /* free any machine hw params */
1051 if (rtd->dai_link->ops->hw_free)
1052 rtd->dai_link->ops->hw_free(substream);
1053
1054 /* free any component resources */
1055 for_each_rtdcom(rtd, rtdcom) {
1056 component = rtdcom->component;
1057
1058 if (!component->driver->ops ||
1059 !component->driver->ops->hw_free)
1060 continue;
1061
1062 component->driver->ops->hw_free(substream);
1063 }
1064
1065 /* now free hw params for the DAIs */
1066 for (i = 0; i < rtd->num_codecs; i++) {
1067 codec_dai = rtd->codec_dais[i];
1068 if (codec_dai->driver->ops->hw_free)
1069 codec_dai->driver->ops->hw_free(substream, codec_dai);
1070 }
1071
1072 if (cpu_dai->driver->ops->hw_free)
1073 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1074
1075 mutex_unlock(&rtd->pcm_mutex);
1076 return 0;
1077 }
1078
1079 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1080 {
1081 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1082 struct snd_soc_component *component;
1083 struct snd_soc_rtdcom_list *rtdcom;
1084 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1085 struct snd_soc_dai *codec_dai;
1086 int i, ret;
1087
1088 for (i = 0; i < rtd->num_codecs; i++) {
1089 codec_dai = rtd->codec_dais[i];
1090 if (codec_dai->driver->ops->trigger) {
1091 ret = codec_dai->driver->ops->trigger(substream,
1092 cmd, codec_dai);
1093 if (ret < 0)
1094 return ret;
1095 }
1096 }
1097
1098 for_each_rtdcom(rtd, rtdcom) {
1099 component = rtdcom->component;
1100
1101 if (!component->driver->ops ||
1102 !component->driver->ops->trigger)
1103 continue;
1104
1105 ret = component->driver->ops->trigger(substream, cmd);
1106 if (ret < 0)
1107 return ret;
1108 }
1109
1110 if (cpu_dai->driver->ops->trigger) {
1111 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
1112 if (ret < 0)
1113 return ret;
1114 }
1115
1116 if (rtd->dai_link->ops->trigger) {
1117 ret = rtd->dai_link->ops->trigger(substream, cmd);
1118 if (ret < 0)
1119 return ret;
1120 }
1121
1122 return 0;
1123 }
1124
1125 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1126 int cmd)
1127 {
1128 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1129 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1130 struct snd_soc_dai *codec_dai;
1131 int i, ret;
1132
1133 for (i = 0; i < rtd->num_codecs; i++) {
1134 codec_dai = rtd->codec_dais[i];
1135 if (codec_dai->driver->ops->bespoke_trigger) {
1136 ret = codec_dai->driver->ops->bespoke_trigger(substream,
1137 cmd, codec_dai);
1138 if (ret < 0)
1139 return ret;
1140 }
1141 }
1142
1143 if (cpu_dai->driver->ops->bespoke_trigger) {
1144 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1145 if (ret < 0)
1146 return ret;
1147 }
1148 return 0;
1149 }
1150 /*
1151 * soc level wrapper for pointer callback
1152 * If cpu_dai, codec_dai, component driver has the delay callback, then
1153 * the runtime->delay will be updated accordingly.
1154 */
1155 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1156 {
1157 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1158 struct snd_soc_component *component;
1159 struct snd_soc_rtdcom_list *rtdcom;
1160 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1161 struct snd_soc_dai *codec_dai;
1162 struct snd_pcm_runtime *runtime = substream->runtime;
1163 snd_pcm_uframes_t offset = 0;
1164 snd_pcm_sframes_t delay = 0;
1165 snd_pcm_sframes_t codec_delay = 0;
1166 int i;
1167
1168 for_each_rtdcom(rtd, rtdcom) {
1169 component = rtdcom->component;
1170
1171 if (!component->driver->ops ||
1172 !component->driver->ops->pointer)
1173 continue;
1174
1175 /* FIXME: use 1st pointer */
1176 offset = component->driver->ops->pointer(substream);
1177 break;
1178 }
1179
1180 if (cpu_dai->driver->ops->delay)
1181 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1182
1183 for (i = 0; i < rtd->num_codecs; i++) {
1184 codec_dai = rtd->codec_dais[i];
1185 if (codec_dai->driver->ops->delay)
1186 codec_delay = max(codec_delay,
1187 codec_dai->driver->ops->delay(substream,
1188 codec_dai));
1189 }
1190 delay += codec_delay;
1191
1192 runtime->delay = delay;
1193
1194 return offset;
1195 }
1196
1197 /* connect a FE and BE */
1198 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1199 struct snd_soc_pcm_runtime *be, int stream)
1200 {
1201 struct snd_soc_dpcm *dpcm;
1202
1203 /* only add new dpcms */
1204 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1205 if (dpcm->be == be && dpcm->fe == fe)
1206 return 0;
1207 }
1208
1209 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1210 if (!dpcm)
1211 return -ENOMEM;
1212
1213 dpcm->be = be;
1214 dpcm->fe = fe;
1215 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1216 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1217 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1218 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1219
1220 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1221 stream ? "capture" : "playback", fe->dai_link->name,
1222 stream ? "<-" : "->", be->dai_link->name);
1223
1224 #ifdef CONFIG_DEBUG_FS
1225 if (fe->debugfs_dpcm_root)
1226 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1227 fe->debugfs_dpcm_root, &dpcm->state);
1228 #endif
1229 return 1;
1230 }
1231
1232 /* reparent a BE onto another FE */
1233 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1234 struct snd_soc_pcm_runtime *be, int stream)
1235 {
1236 struct snd_soc_dpcm *dpcm;
1237 struct snd_pcm_substream *fe_substream, *be_substream;
1238
1239 /* reparent if BE is connected to other FEs */
1240 if (!be->dpcm[stream].users)
1241 return;
1242
1243 be_substream = snd_soc_dpcm_get_substream(be, stream);
1244
1245 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
1246 if (dpcm->fe == fe)
1247 continue;
1248
1249 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1250 stream ? "capture" : "playback",
1251 dpcm->fe->dai_link->name,
1252 stream ? "<-" : "->", dpcm->be->dai_link->name);
1253
1254 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1255 be_substream->runtime = fe_substream->runtime;
1256 break;
1257 }
1258 }
1259
1260 /* disconnect a BE and FE */
1261 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1262 {
1263 struct snd_soc_dpcm *dpcm, *d;
1264
1265 list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
1266 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1267 stream ? "capture" : "playback",
1268 dpcm->be->dai_link->name);
1269
1270 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1271 continue;
1272
1273 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1274 stream ? "capture" : "playback", fe->dai_link->name,
1275 stream ? "<-" : "->", dpcm->be->dai_link->name);
1276
1277 /* BEs still alive need new FE */
1278 dpcm_be_reparent(fe, dpcm->be, stream);
1279
1280 #ifdef CONFIG_DEBUG_FS
1281 debugfs_remove(dpcm->debugfs_state);
1282 #endif
1283 list_del(&dpcm->list_be);
1284 list_del(&dpcm->list_fe);
1285 kfree(dpcm);
1286 }
1287 }
1288
1289 /* get BE for DAI widget and stream */
1290 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1291 struct snd_soc_dapm_widget *widget, int stream)
1292 {
1293 struct snd_soc_pcm_runtime *be;
1294 int i;
1295
1296 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1297
1298 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1299 list_for_each_entry(be, &card->rtd_list, list) {
1300
1301 if (!be->dai_link->no_pcm)
1302 continue;
1303
1304 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1305 be->cpu_dai->playback_widget ?
1306 be->cpu_dai->playback_widget->name : "(not set)");
1307
1308 if (be->cpu_dai->playback_widget == widget)
1309 return be;
1310
1311 for (i = 0; i < be->num_codecs; i++) {
1312 struct snd_soc_dai *dai = be->codec_dais[i];
1313 if (dai->playback_widget == widget)
1314 return be;
1315 }
1316 }
1317 } else {
1318
1319 list_for_each_entry(be, &card->rtd_list, list) {
1320
1321 if (!be->dai_link->no_pcm)
1322 continue;
1323
1324 dev_dbg(card->dev, "ASoC: try BE %s\n",
1325 be->cpu_dai->capture_widget ?
1326 be->cpu_dai->capture_widget->name : "(not set)");
1327
1328 if (be->cpu_dai->capture_widget == widget)
1329 return be;
1330
1331 for (i = 0; i < be->num_codecs; i++) {
1332 struct snd_soc_dai *dai = be->codec_dais[i];
1333 if (dai->capture_widget == widget)
1334 return be;
1335 }
1336 }
1337 }
1338
1339 /* dai link name and stream name set correctly ? */
1340 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1341 stream ? "capture" : "playback", widget->name);
1342 return NULL;
1343 }
1344
1345 static inline struct snd_soc_dapm_widget *
1346 dai_get_widget(struct snd_soc_dai *dai, int stream)
1347 {
1348 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1349 return dai->playback_widget;
1350 else
1351 return dai->capture_widget;
1352 }
1353
1354 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1355 struct snd_soc_dapm_widget *widget)
1356 {
1357 int i;
1358
1359 for (i = 0; i < list->num_widgets; i++) {
1360 if (widget == list->widgets[i])
1361 return 1;
1362 }
1363
1364 return 0;
1365 }
1366
1367 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1368 enum snd_soc_dapm_direction dir)
1369 {
1370 struct snd_soc_card *card = widget->dapm->card;
1371 struct snd_soc_pcm_runtime *rtd;
1372 int i;
1373
1374 if (dir == SND_SOC_DAPM_DIR_OUT) {
1375 list_for_each_entry(rtd, &card->rtd_list, list) {
1376 if (!rtd->dai_link->no_pcm)
1377 continue;
1378
1379 if (rtd->cpu_dai->playback_widget == widget)
1380 return true;
1381
1382 for (i = 0; i < rtd->num_codecs; ++i) {
1383 struct snd_soc_dai *dai = rtd->codec_dais[i];
1384 if (dai->playback_widget == widget)
1385 return true;
1386 }
1387 }
1388 } else { /* SND_SOC_DAPM_DIR_IN */
1389 list_for_each_entry(rtd, &card->rtd_list, list) {
1390 if (!rtd->dai_link->no_pcm)
1391 continue;
1392
1393 if (rtd->cpu_dai->capture_widget == widget)
1394 return true;
1395
1396 for (i = 0; i < rtd->num_codecs; ++i) {
1397 struct snd_soc_dai *dai = rtd->codec_dais[i];
1398 if (dai->capture_widget == widget)
1399 return true;
1400 }
1401 }
1402 }
1403
1404 return false;
1405 }
1406
1407 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1408 int stream, struct snd_soc_dapm_widget_list **list)
1409 {
1410 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1411 int paths;
1412
1413 /* get number of valid DAI paths and their widgets */
1414 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1415 dpcm_end_walk_at_be);
1416
1417 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1418 stream ? "capture" : "playback");
1419
1420 return paths;
1421 }
1422
1423 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1424 struct snd_soc_dapm_widget_list **list_)
1425 {
1426 struct snd_soc_dpcm *dpcm;
1427 struct snd_soc_dapm_widget_list *list = *list_;
1428 struct snd_soc_dapm_widget *widget;
1429 int prune = 0;
1430
1431 /* Destroy any old FE <--> BE connections */
1432 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1433 unsigned int i;
1434
1435 /* is there a valid CPU DAI widget for this BE */
1436 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1437
1438 /* prune the BE if it's no longer in our active list */
1439 if (widget && widget_in_list(list, widget))
1440 continue;
1441
1442 /* is there a valid CODEC DAI widget for this BE */
1443 for (i = 0; i < dpcm->be->num_codecs; i++) {
1444 struct snd_soc_dai *dai = dpcm->be->codec_dais[i];
1445 widget = dai_get_widget(dai, stream);
1446
1447 /* prune the BE if it's no longer in our active list */
1448 if (widget && widget_in_list(list, widget))
1449 continue;
1450 }
1451
1452 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1453 stream ? "capture" : "playback",
1454 dpcm->be->dai_link->name, fe->dai_link->name);
1455 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1456 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1457 prune++;
1458 }
1459
1460 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1461 return prune;
1462 }
1463
1464 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1465 struct snd_soc_dapm_widget_list **list_)
1466 {
1467 struct snd_soc_card *card = fe->card;
1468 struct snd_soc_dapm_widget_list *list = *list_;
1469 struct snd_soc_pcm_runtime *be;
1470 int i, new = 0, err;
1471
1472 /* Create any new FE <--> BE connections */
1473 for (i = 0; i < list->num_widgets; i++) {
1474
1475 switch (list->widgets[i]->id) {
1476 case snd_soc_dapm_dai_in:
1477 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1478 continue;
1479 break;
1480 case snd_soc_dapm_dai_out:
1481 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1482 continue;
1483 break;
1484 default:
1485 continue;
1486 }
1487
1488 /* is there a valid BE rtd for this widget */
1489 be = dpcm_get_be(card, list->widgets[i], stream);
1490 if (!be) {
1491 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1492 list->widgets[i]->name);
1493 continue;
1494 }
1495
1496 /* make sure BE is a real BE */
1497 if (!be->dai_link->no_pcm)
1498 continue;
1499
1500 /* don't connect if FE is not running */
1501 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1502 continue;
1503
1504 /* newly connected FE and BE */
1505 err = dpcm_be_connect(fe, be, stream);
1506 if (err < 0) {
1507 dev_err(fe->dev, "ASoC: can't connect %s\n",
1508 list->widgets[i]->name);
1509 break;
1510 } else if (err == 0) /* already connected */
1511 continue;
1512
1513 /* new */
1514 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1515 new++;
1516 }
1517
1518 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1519 return new;
1520 }
1521
1522 /*
1523 * Find the corresponding BE DAIs that source or sink audio to this
1524 * FE substream.
1525 */
1526 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1527 int stream, struct snd_soc_dapm_widget_list **list, int new)
1528 {
1529 if (new)
1530 return dpcm_add_paths(fe, stream, list);
1531 else
1532 return dpcm_prune_paths(fe, stream, list);
1533 }
1534
1535 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1536 {
1537 struct snd_soc_dpcm *dpcm;
1538
1539 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
1540 dpcm->be->dpcm[stream].runtime_update =
1541 SND_SOC_DPCM_UPDATE_NO;
1542 }
1543
1544 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1545 int stream)
1546 {
1547 struct snd_soc_dpcm *dpcm;
1548
1549 /* disable any enabled and non active backends */
1550 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1551
1552 struct snd_soc_pcm_runtime *be = dpcm->be;
1553 struct snd_pcm_substream *be_substream =
1554 snd_soc_dpcm_get_substream(be, stream);
1555
1556 if (be->dpcm[stream].users == 0)
1557 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1558 stream ? "capture" : "playback",
1559 be->dpcm[stream].state);
1560
1561 if (--be->dpcm[stream].users != 0)
1562 continue;
1563
1564 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1565 continue;
1566
1567 soc_pcm_close(be_substream);
1568 be_substream->runtime = NULL;
1569 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1570 }
1571 }
1572
1573 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1574 {
1575 struct snd_soc_dpcm *dpcm;
1576 int err, count = 0;
1577
1578 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1579 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1580
1581 struct snd_soc_pcm_runtime *be = dpcm->be;
1582 struct snd_pcm_substream *be_substream =
1583 snd_soc_dpcm_get_substream(be, stream);
1584
1585 if (!be_substream) {
1586 dev_err(be->dev, "ASoC: no backend %s stream\n",
1587 stream ? "capture" : "playback");
1588 continue;
1589 }
1590
1591 /* is this op for this BE ? */
1592 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1593 continue;
1594
1595 /* first time the dpcm is open ? */
1596 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1597 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1598 stream ? "capture" : "playback",
1599 be->dpcm[stream].state);
1600
1601 if (be->dpcm[stream].users++ != 0)
1602 continue;
1603
1604 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1605 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1606 continue;
1607
1608 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1609 stream ? "capture" : "playback", be->dai_link->name);
1610
1611 be_substream->runtime = be->dpcm[stream].runtime;
1612 err = soc_pcm_open(be_substream);
1613 if (err < 0) {
1614 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1615 be->dpcm[stream].users--;
1616 if (be->dpcm[stream].users < 0)
1617 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1618 stream ? "capture" : "playback",
1619 be->dpcm[stream].state);
1620
1621 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1622 goto unwind;
1623 }
1624
1625 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1626 count++;
1627 }
1628
1629 return count;
1630
1631 unwind:
1632 /* disable any enabled and non active backends */
1633 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1634 struct snd_soc_pcm_runtime *be = dpcm->be;
1635 struct snd_pcm_substream *be_substream =
1636 snd_soc_dpcm_get_substream(be, stream);
1637
1638 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1639 continue;
1640
1641 if (be->dpcm[stream].users == 0)
1642 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1643 stream ? "capture" : "playback",
1644 be->dpcm[stream].state);
1645
1646 if (--be->dpcm[stream].users != 0)
1647 continue;
1648
1649 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1650 continue;
1651
1652 soc_pcm_close(be_substream);
1653 be_substream->runtime = NULL;
1654 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1655 }
1656
1657 return err;
1658 }
1659
1660 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1661 struct snd_soc_pcm_stream *stream,
1662 u64 formats)
1663 {
1664 runtime->hw.rate_min = stream->rate_min;
1665 runtime->hw.rate_max = stream->rate_max;
1666 runtime->hw.channels_min = stream->channels_min;
1667 runtime->hw.channels_max = stream->channels_max;
1668 if (runtime->hw.formats)
1669 runtime->hw.formats &= formats & stream->formats;
1670 else
1671 runtime->hw.formats = formats & stream->formats;
1672 runtime->hw.rates = stream->rates;
1673 }
1674
1675 static u64 dpcm_runtime_base_format(struct snd_pcm_substream *substream)
1676 {
1677 struct snd_soc_pcm_runtime *fe = substream->private_data;
1678 struct snd_soc_dpcm *dpcm;
1679 u64 formats = ULLONG_MAX;
1680 int stream = substream->stream;
1681
1682 if (!fe->dai_link->dpcm_merged_format)
1683 return formats;
1684
1685 /*
1686 * It returns merged BE codec format
1687 * if FE want to use it (= dpcm_merged_format)
1688 */
1689
1690 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1691 struct snd_soc_pcm_runtime *be = dpcm->be;
1692 struct snd_soc_dai_driver *codec_dai_drv;
1693 struct snd_soc_pcm_stream *codec_stream;
1694 int i;
1695
1696 for (i = 0; i < be->num_codecs; i++) {
1697 codec_dai_drv = be->codec_dais[i]->driver;
1698 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1699 codec_stream = &codec_dai_drv->playback;
1700 else
1701 codec_stream = &codec_dai_drv->capture;
1702
1703 formats &= codec_stream->formats;
1704 }
1705 }
1706
1707 return formats;
1708 }
1709
1710 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1711 {
1712 struct snd_pcm_runtime *runtime = substream->runtime;
1713 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1714 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1715 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1716 u64 format = dpcm_runtime_base_format(substream);
1717
1718 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1719 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback, format);
1720 else
1721 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture, format);
1722 }
1723
1724 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1725
1726 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1727 * for avoiding the race with trigger callback.
1728 * If the state is unset and a trigger is pending while the previous operation,
1729 * process the pending trigger action here.
1730 */
1731 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1732 int stream, enum snd_soc_dpcm_update state)
1733 {
1734 struct snd_pcm_substream *substream =
1735 snd_soc_dpcm_get_substream(fe, stream);
1736
1737 snd_pcm_stream_lock_irq(substream);
1738 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1739 dpcm_fe_dai_do_trigger(substream,
1740 fe->dpcm[stream].trigger_pending - 1);
1741 fe->dpcm[stream].trigger_pending = 0;
1742 }
1743 fe->dpcm[stream].runtime_update = state;
1744 snd_pcm_stream_unlock_irq(substream);
1745 }
1746
1747 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1748 int stream)
1749 {
1750 struct snd_soc_dpcm *dpcm;
1751 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1752 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1753 int err;
1754
1755 /* apply symmetry for FE */
1756 if (soc_pcm_has_symmetry(fe_substream))
1757 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1758
1759 /* Symmetry only applies if we've got an active stream. */
1760 if (fe_cpu_dai->active) {
1761 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1762 if (err < 0)
1763 return err;
1764 }
1765
1766 /* apply symmetry for BE */
1767 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1768 struct snd_soc_pcm_runtime *be = dpcm->be;
1769 struct snd_pcm_substream *be_substream =
1770 snd_soc_dpcm_get_substream(be, stream);
1771 struct snd_soc_pcm_runtime *rtd = be_substream->private_data;
1772 int i;
1773
1774 if (rtd->dai_link->be_hw_params_fixup)
1775 continue;
1776
1777 if (soc_pcm_has_symmetry(be_substream))
1778 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1779
1780 /* Symmetry only applies if we've got an active stream. */
1781 if (rtd->cpu_dai->active) {
1782 err = soc_pcm_apply_symmetry(fe_substream,
1783 rtd->cpu_dai);
1784 if (err < 0)
1785 return err;
1786 }
1787
1788 for (i = 0; i < rtd->num_codecs; i++) {
1789 if (rtd->codec_dais[i]->active) {
1790 err = soc_pcm_apply_symmetry(fe_substream,
1791 rtd->codec_dais[i]);
1792 if (err < 0)
1793 return err;
1794 }
1795 }
1796 }
1797
1798 return 0;
1799 }
1800
1801 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1802 {
1803 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1804 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1805 int stream = fe_substream->stream, ret = 0;
1806
1807 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1808
1809 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1810 if (ret < 0) {
1811 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1812 goto be_err;
1813 }
1814
1815 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1816
1817 /* start the DAI frontend */
1818 ret = soc_pcm_open(fe_substream);
1819 if (ret < 0) {
1820 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1821 goto unwind;
1822 }
1823
1824 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1825
1826 dpcm_set_fe_runtime(fe_substream);
1827 snd_pcm_limit_hw_rates(runtime);
1828
1829 ret = dpcm_apply_symmetry(fe_substream, stream);
1830 if (ret < 0) {
1831 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1832 ret);
1833 goto unwind;
1834 }
1835
1836 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1837 return 0;
1838
1839 unwind:
1840 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1841 be_err:
1842 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1843 return ret;
1844 }
1845
1846 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1847 {
1848 struct snd_soc_dpcm *dpcm;
1849
1850 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1851 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1852
1853 struct snd_soc_pcm_runtime *be = dpcm->be;
1854 struct snd_pcm_substream *be_substream =
1855 snd_soc_dpcm_get_substream(be, stream);
1856
1857 /* is this op for this BE ? */
1858 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1859 continue;
1860
1861 if (be->dpcm[stream].users == 0)
1862 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1863 stream ? "capture" : "playback",
1864 be->dpcm[stream].state);
1865
1866 if (--be->dpcm[stream].users != 0)
1867 continue;
1868
1869 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1870 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
1871 soc_pcm_hw_free(be_substream);
1872 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1873 }
1874
1875 dev_dbg(be->dev, "ASoC: close BE %s\n",
1876 be->dai_link->name);
1877
1878 soc_pcm_close(be_substream);
1879 be_substream->runtime = NULL;
1880
1881 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1882 }
1883 return 0;
1884 }
1885
1886 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
1887 {
1888 struct snd_soc_pcm_runtime *fe = substream->private_data;
1889 int stream = substream->stream;
1890
1891 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1892
1893 /* shutdown the BEs */
1894 dpcm_be_dai_shutdown(fe, substream->stream);
1895
1896 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
1897
1898 /* now shutdown the frontend */
1899 soc_pcm_close(substream);
1900
1901 /* run the stream event for each BE */
1902 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
1903
1904 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1905 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1906 return 0;
1907 }
1908
1909 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
1910 {
1911 struct snd_soc_dpcm *dpcm;
1912
1913 /* only hw_params backends that are either sinks or sources
1914 * to this frontend DAI */
1915 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1916
1917 struct snd_soc_pcm_runtime *be = dpcm->be;
1918 struct snd_pcm_substream *be_substream =
1919 snd_soc_dpcm_get_substream(be, stream);
1920
1921 /* is this op for this BE ? */
1922 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1923 continue;
1924
1925 /* only free hw when no longer used - check all FEs */
1926 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
1927 continue;
1928
1929 /* do not free hw if this BE is used by other FE */
1930 if (be->dpcm[stream].users > 1)
1931 continue;
1932
1933 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
1934 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
1935 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1936 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
1937 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
1938 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
1939 continue;
1940
1941 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
1942 be->dai_link->name);
1943
1944 soc_pcm_hw_free(be_substream);
1945
1946 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1947 }
1948
1949 return 0;
1950 }
1951
1952 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
1953 {
1954 struct snd_soc_pcm_runtime *fe = substream->private_data;
1955 int err, stream = substream->stream;
1956
1957 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
1958 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1959
1960 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
1961
1962 /* call hw_free on the frontend */
1963 err = soc_pcm_hw_free(substream);
1964 if (err < 0)
1965 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
1966 fe->dai_link->name);
1967
1968 /* only hw_params backends that are either sinks or sources
1969 * to this frontend DAI */
1970 err = dpcm_be_dai_hw_free(fe, stream);
1971
1972 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1973 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1974
1975 mutex_unlock(&fe->card->mutex);
1976 return 0;
1977 }
1978
1979 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
1980 {
1981 struct snd_soc_dpcm *dpcm;
1982 int ret;
1983
1984 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
1985
1986 struct snd_soc_pcm_runtime *be = dpcm->be;
1987 struct snd_pcm_substream *be_substream =
1988 snd_soc_dpcm_get_substream(be, stream);
1989
1990 /* is this op for this BE ? */
1991 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1992 continue;
1993
1994 /* copy params for each dpcm */
1995 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
1996 sizeof(struct snd_pcm_hw_params));
1997
1998 /* perform any hw_params fixups */
1999 if (be->dai_link->be_hw_params_fixup) {
2000 ret = be->dai_link->be_hw_params_fixup(be,
2001 &dpcm->hw_params);
2002 if (ret < 0) {
2003 dev_err(be->dev,
2004 "ASoC: hw_params BE fixup failed %d\n",
2005 ret);
2006 goto unwind;
2007 }
2008 }
2009
2010 /* only allow hw_params() if no connected FEs are running */
2011 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2012 continue;
2013
2014 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2015 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2016 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2017 continue;
2018
2019 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2020 be->dai_link->name);
2021
2022 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2023 if (ret < 0) {
2024 dev_err(dpcm->be->dev,
2025 "ASoC: hw_params BE failed %d\n", ret);
2026 goto unwind;
2027 }
2028
2029 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2030 }
2031 return 0;
2032
2033 unwind:
2034 /* disable any enabled and non active backends */
2035 list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2036 struct snd_soc_pcm_runtime *be = dpcm->be;
2037 struct snd_pcm_substream *be_substream =
2038 snd_soc_dpcm_get_substream(be, stream);
2039
2040 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2041 continue;
2042
2043 /* only allow hw_free() if no connected FEs are running */
2044 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2045 continue;
2046
2047 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2048 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2049 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2050 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2051 continue;
2052
2053 soc_pcm_hw_free(be_substream);
2054 }
2055
2056 return ret;
2057 }
2058
2059 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2060 struct snd_pcm_hw_params *params)
2061 {
2062 struct snd_soc_pcm_runtime *fe = substream->private_data;
2063 int ret, stream = substream->stream;
2064
2065 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2066 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2067
2068 memcpy(&fe->dpcm[substream->stream].hw_params, params,
2069 sizeof(struct snd_pcm_hw_params));
2070 ret = dpcm_be_dai_hw_params(fe, substream->stream);
2071 if (ret < 0) {
2072 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2073 goto out;
2074 }
2075
2076 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2077 fe->dai_link->name, params_rate(params),
2078 params_channels(params), params_format(params));
2079
2080 /* call hw_params on the frontend */
2081 ret = soc_pcm_hw_params(substream, params);
2082 if (ret < 0) {
2083 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2084 dpcm_be_dai_hw_free(fe, stream);
2085 } else
2086 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2087
2088 out:
2089 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2090 mutex_unlock(&fe->card->mutex);
2091 return ret;
2092 }
2093
2094 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2095 struct snd_pcm_substream *substream, int cmd)
2096 {
2097 int ret;
2098
2099 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2100 dpcm->be->dai_link->name, cmd);
2101
2102 ret = soc_pcm_trigger(substream, cmd);
2103 if (ret < 0)
2104 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2105
2106 return ret;
2107 }
2108
2109 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2110 int cmd)
2111 {
2112 struct snd_soc_dpcm *dpcm;
2113 int ret = 0;
2114
2115 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2116
2117 struct snd_soc_pcm_runtime *be = dpcm->be;
2118 struct snd_pcm_substream *be_substream =
2119 snd_soc_dpcm_get_substream(be, stream);
2120
2121 /* is this op for this BE ? */
2122 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2123 continue;
2124
2125 switch (cmd) {
2126 case SNDRV_PCM_TRIGGER_START:
2127 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2128 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2129 continue;
2130
2131 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2132 if (ret)
2133 return ret;
2134
2135 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2136 break;
2137 case SNDRV_PCM_TRIGGER_RESUME:
2138 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2139 continue;
2140
2141 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2142 if (ret)
2143 return ret;
2144
2145 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2146 break;
2147 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2148 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2149 continue;
2150
2151 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2152 if (ret)
2153 return ret;
2154
2155 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2156 break;
2157 case SNDRV_PCM_TRIGGER_STOP:
2158 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2159 continue;
2160
2161 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2162 continue;
2163
2164 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2165 if (ret)
2166 return ret;
2167
2168 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2169 break;
2170 case SNDRV_PCM_TRIGGER_SUSPEND:
2171 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2172 continue;
2173
2174 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2175 continue;
2176
2177 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2178 if (ret)
2179 return ret;
2180
2181 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2182 break;
2183 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2184 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2185 continue;
2186
2187 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2188 continue;
2189
2190 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2191 if (ret)
2192 return ret;
2193
2194 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2195 break;
2196 }
2197 }
2198
2199 return ret;
2200 }
2201 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2202
2203 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2204 {
2205 struct snd_soc_pcm_runtime *fe = substream->private_data;
2206 int stream = substream->stream, ret;
2207 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2208
2209 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2210
2211 switch (trigger) {
2212 case SND_SOC_DPCM_TRIGGER_PRE:
2213 /* call trigger on the frontend before the backend. */
2214
2215 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2216 fe->dai_link->name, cmd);
2217
2218 ret = soc_pcm_trigger(substream, cmd);
2219 if (ret < 0) {
2220 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2221 goto out;
2222 }
2223
2224 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2225 break;
2226 case SND_SOC_DPCM_TRIGGER_POST:
2227 /* call trigger on the frontend after the backend. */
2228
2229 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2230 if (ret < 0) {
2231 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2232 goto out;
2233 }
2234
2235 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2236 fe->dai_link->name, cmd);
2237
2238 ret = soc_pcm_trigger(substream, cmd);
2239 break;
2240 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2241 /* bespoke trigger() - handles both FE and BEs */
2242
2243 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2244 fe->dai_link->name, cmd);
2245
2246 ret = soc_pcm_bespoke_trigger(substream, cmd);
2247 if (ret < 0) {
2248 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2249 goto out;
2250 }
2251 break;
2252 default:
2253 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2254 fe->dai_link->name);
2255 ret = -EINVAL;
2256 goto out;
2257 }
2258
2259 switch (cmd) {
2260 case SNDRV_PCM_TRIGGER_START:
2261 case SNDRV_PCM_TRIGGER_RESUME:
2262 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2263 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2264 break;
2265 case SNDRV_PCM_TRIGGER_STOP:
2266 case SNDRV_PCM_TRIGGER_SUSPEND:
2267 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2268 break;
2269 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2270 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2271 break;
2272 }
2273
2274 out:
2275 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2276 return ret;
2277 }
2278
2279 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2280 {
2281 struct snd_soc_pcm_runtime *fe = substream->private_data;
2282 int stream = substream->stream;
2283
2284 /* if FE's runtime_update is already set, we're in race;
2285 * process this trigger later at exit
2286 */
2287 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2288 fe->dpcm[stream].trigger_pending = cmd + 1;
2289 return 0; /* delayed, assuming it's successful */
2290 }
2291
2292 /* we're alone, let's trigger */
2293 return dpcm_fe_dai_do_trigger(substream, cmd);
2294 }
2295
2296 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2297 {
2298 struct snd_soc_dpcm *dpcm;
2299 int ret = 0;
2300
2301 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2302
2303 struct snd_soc_pcm_runtime *be = dpcm->be;
2304 struct snd_pcm_substream *be_substream =
2305 snd_soc_dpcm_get_substream(be, stream);
2306
2307 /* is this op for this BE ? */
2308 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2309 continue;
2310
2311 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2312 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2313 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2314 continue;
2315
2316 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2317 be->dai_link->name);
2318
2319 ret = soc_pcm_prepare(be_substream);
2320 if (ret < 0) {
2321 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2322 ret);
2323 break;
2324 }
2325
2326 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2327 }
2328 return ret;
2329 }
2330
2331 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2332 {
2333 struct snd_soc_pcm_runtime *fe = substream->private_data;
2334 int stream = substream->stream, ret = 0;
2335
2336 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2337
2338 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2339
2340 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2341
2342 /* there is no point preparing this FE if there are no BEs */
2343 if (list_empty(&fe->dpcm[stream].be_clients)) {
2344 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2345 fe->dai_link->name);
2346 ret = -EINVAL;
2347 goto out;
2348 }
2349
2350 ret = dpcm_be_dai_prepare(fe, substream->stream);
2351 if (ret < 0)
2352 goto out;
2353
2354 /* call prepare on the frontend */
2355 ret = soc_pcm_prepare(substream);
2356 if (ret < 0) {
2357 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2358 fe->dai_link->name);
2359 goto out;
2360 }
2361
2362 /* run the stream event for each BE */
2363 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2364 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2365
2366 out:
2367 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2368 mutex_unlock(&fe->card->mutex);
2369
2370 return ret;
2371 }
2372
2373 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2374 unsigned int cmd, void *arg)
2375 {
2376 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2377 struct snd_soc_component *component;
2378 struct snd_soc_rtdcom_list *rtdcom;
2379
2380 for_each_rtdcom(rtd, rtdcom) {
2381 component = rtdcom->component;
2382
2383 if (!component->driver->ops ||
2384 !component->driver->ops->ioctl)
2385 continue;
2386
2387 /* FIXME: use 1st ioctl */
2388 return component->driver->ops->ioctl(substream, cmd, arg);
2389 }
2390
2391 return snd_pcm_lib_ioctl(substream, cmd, arg);
2392 }
2393
2394 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2395 {
2396 struct snd_pcm_substream *substream =
2397 snd_soc_dpcm_get_substream(fe, stream);
2398 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2399 int err;
2400
2401 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2402 stream ? "capture" : "playback", fe->dai_link->name);
2403
2404 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2405 /* call bespoke trigger - FE takes care of all BE triggers */
2406 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2407 fe->dai_link->name);
2408
2409 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2410 if (err < 0)
2411 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2412 } else {
2413 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2414 fe->dai_link->name);
2415
2416 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2417 if (err < 0)
2418 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2419 }
2420
2421 err = dpcm_be_dai_hw_free(fe, stream);
2422 if (err < 0)
2423 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2424
2425 err = dpcm_be_dai_shutdown(fe, stream);
2426 if (err < 0)
2427 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2428
2429 /* run the stream event for each BE */
2430 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2431
2432 return 0;
2433 }
2434
2435 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2436 {
2437 struct snd_pcm_substream *substream =
2438 snd_soc_dpcm_get_substream(fe, stream);
2439 struct snd_soc_dpcm *dpcm;
2440 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2441 int ret;
2442
2443 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2444 stream ? "capture" : "playback", fe->dai_link->name);
2445
2446 /* Only start the BE if the FE is ready */
2447 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2448 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2449 return -EINVAL;
2450
2451 /* startup must always be called for new BEs */
2452 ret = dpcm_be_dai_startup(fe, stream);
2453 if (ret < 0)
2454 goto disconnect;
2455
2456 /* keep going if FE state is > open */
2457 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2458 return 0;
2459
2460 ret = dpcm_be_dai_hw_params(fe, stream);
2461 if (ret < 0)
2462 goto close;
2463
2464 /* keep going if FE state is > hw_params */
2465 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2466 return 0;
2467
2468
2469 ret = dpcm_be_dai_prepare(fe, stream);
2470 if (ret < 0)
2471 goto hw_free;
2472
2473 /* run the stream event for each BE */
2474 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2475
2476 /* keep going if FE state is > prepare */
2477 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2478 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2479 return 0;
2480
2481 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2482 /* call trigger on the frontend - FE takes care of all BE triggers */
2483 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2484 fe->dai_link->name);
2485
2486 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2487 if (ret < 0) {
2488 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2489 goto hw_free;
2490 }
2491 } else {
2492 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2493 fe->dai_link->name);
2494
2495 ret = dpcm_be_dai_trigger(fe, stream,
2496 SNDRV_PCM_TRIGGER_START);
2497 if (ret < 0) {
2498 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2499 goto hw_free;
2500 }
2501 }
2502
2503 return 0;
2504
2505 hw_free:
2506 dpcm_be_dai_hw_free(fe, stream);
2507 close:
2508 dpcm_be_dai_shutdown(fe, stream);
2509 disconnect:
2510 /* disconnect any non started BEs */
2511 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
2512 struct snd_soc_pcm_runtime *be = dpcm->be;
2513 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2514 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2515 }
2516
2517 return ret;
2518 }
2519
2520 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2521 {
2522 int ret;
2523
2524 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2525 ret = dpcm_run_update_startup(fe, stream);
2526 if (ret < 0)
2527 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2528 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2529
2530 return ret;
2531 }
2532
2533 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2534 {
2535 int ret;
2536
2537 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2538 ret = dpcm_run_update_shutdown(fe, stream);
2539 if (ret < 0)
2540 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2541 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2542
2543 return ret;
2544 }
2545
2546 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2547 * any DAI links.
2548 */
2549 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2550 {
2551 struct snd_soc_pcm_runtime *fe;
2552 int old, new, paths;
2553
2554 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2555 list_for_each_entry(fe, &card->rtd_list, list) {
2556 struct snd_soc_dapm_widget_list *list;
2557
2558 /* make sure link is FE */
2559 if (!fe->dai_link->dynamic)
2560 continue;
2561
2562 /* only check active links */
2563 if (!fe->cpu_dai->active)
2564 continue;
2565
2566 /* DAPM sync will call this to update DSP paths */
2567 dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n",
2568 fe->dai_link->name);
2569
2570 /* skip if FE doesn't have playback capability */
2571 if (!fe->cpu_dai->driver->playback.channels_min
2572 || !fe->codec_dai->driver->playback.channels_min)
2573 goto capture;
2574
2575 /* skip if FE isn't currently playing */
2576 if (!fe->cpu_dai->playback_active
2577 || !fe->codec_dai->playback_active)
2578 goto capture;
2579
2580 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2581 if (paths < 0) {
2582 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2583 fe->dai_link->name, "playback");
2584 mutex_unlock(&card->mutex);
2585 return paths;
2586 }
2587
2588 /* update any new playback paths */
2589 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1);
2590 if (new) {
2591 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2592 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2593 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2594 }
2595
2596 /* update any old playback paths */
2597 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0);
2598 if (old) {
2599 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2600 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2601 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2602 }
2603
2604 dpcm_path_put(&list);
2605 capture:
2606 /* skip if FE doesn't have capture capability */
2607 if (!fe->cpu_dai->driver->capture.channels_min
2608 || !fe->codec_dai->driver->capture.channels_min)
2609 continue;
2610
2611 /* skip if FE isn't currently capturing */
2612 if (!fe->cpu_dai->capture_active
2613 || !fe->codec_dai->capture_active)
2614 continue;
2615
2616 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2617 if (paths < 0) {
2618 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2619 fe->dai_link->name, "capture");
2620 mutex_unlock(&card->mutex);
2621 return paths;
2622 }
2623
2624 /* update any new capture paths */
2625 new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1);
2626 if (new) {
2627 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2628 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2629 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2630 }
2631
2632 /* update any old capture paths */
2633 old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0);
2634 if (old) {
2635 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2636 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2637 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2638 }
2639
2640 dpcm_path_put(&list);
2641 }
2642
2643 mutex_unlock(&card->mutex);
2644 return 0;
2645 }
2646 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2647 {
2648 struct snd_soc_dpcm *dpcm;
2649 struct list_head *clients =
2650 &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients;
2651
2652 list_for_each_entry(dpcm, clients, list_be) {
2653
2654 struct snd_soc_pcm_runtime *be = dpcm->be;
2655 int i;
2656
2657 if (be->dai_link->ignore_suspend)
2658 continue;
2659
2660 for (i = 0; i < be->num_codecs; i++) {
2661 struct snd_soc_dai *dai = be->codec_dais[i];
2662 struct snd_soc_dai_driver *drv = dai->driver;
2663
2664 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2665 be->dai_link->name);
2666
2667 if (drv->ops && drv->ops->digital_mute &&
2668 dai->playback_active)
2669 drv->ops->digital_mute(dai, mute);
2670 }
2671 }
2672
2673 return 0;
2674 }
2675
2676 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2677 {
2678 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2679 struct snd_soc_dpcm *dpcm;
2680 struct snd_soc_dapm_widget_list *list;
2681 int ret;
2682 int stream = fe_substream->stream;
2683
2684 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2685 fe->dpcm[stream].runtime = fe_substream->runtime;
2686
2687 ret = dpcm_path_get(fe, stream, &list);
2688 if (ret < 0) {
2689 mutex_unlock(&fe->card->mutex);
2690 return ret;
2691 } else if (ret == 0) {
2692 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2693 fe->dai_link->name, stream ? "capture" : "playback");
2694 }
2695
2696 /* calculate valid and active FE <-> BE dpcms */
2697 dpcm_process_paths(fe, stream, &list, 1);
2698
2699 ret = dpcm_fe_dai_startup(fe_substream);
2700 if (ret < 0) {
2701 /* clean up all links */
2702 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2703 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2704
2705 dpcm_be_disconnect(fe, stream);
2706 fe->dpcm[stream].runtime = NULL;
2707 }
2708
2709 dpcm_clear_pending_state(fe, stream);
2710 dpcm_path_put(&list);
2711 mutex_unlock(&fe->card->mutex);
2712 return ret;
2713 }
2714
2715 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2716 {
2717 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2718 struct snd_soc_dpcm *dpcm;
2719 int stream = fe_substream->stream, ret;
2720
2721 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2722 ret = dpcm_fe_dai_shutdown(fe_substream);
2723
2724 /* mark FE's links ready to prune */
2725 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
2726 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2727
2728 dpcm_be_disconnect(fe, stream);
2729
2730 fe->dpcm[stream].runtime = NULL;
2731 mutex_unlock(&fe->card->mutex);
2732 return ret;
2733 }
2734
2735 static void soc_pcm_private_free(struct snd_pcm *pcm)
2736 {
2737 struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2738 struct snd_soc_rtdcom_list *rtdcom;
2739 struct snd_soc_component *component;
2740
2741 /* need to sync the delayed work before releasing resources */
2742 flush_delayed_work(&rtd->delayed_work);
2743 for_each_rtdcom(rtd, rtdcom) {
2744 component = rtdcom->component;
2745
2746 if (component->driver->pcm_free)
2747 component->driver->pcm_free(pcm);
2748 }
2749 }
2750
2751 static int soc_rtdcom_ack(struct snd_pcm_substream *substream)
2752 {
2753 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2754 struct snd_soc_rtdcom_list *rtdcom;
2755 struct snd_soc_component *component;
2756
2757 for_each_rtdcom(rtd, rtdcom) {
2758 component = rtdcom->component;
2759
2760 if (!component->driver->ops ||
2761 !component->driver->ops->ack)
2762 continue;
2763
2764 /* FIXME. it returns 1st ask now */
2765 return component->driver->ops->ack(substream);
2766 }
2767
2768 return -EINVAL;
2769 }
2770
2771 static int soc_rtdcom_copy_user(struct snd_pcm_substream *substream, int channel,
2772 unsigned long pos, void __user *buf,
2773 unsigned long bytes)
2774 {
2775 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2776 struct snd_soc_rtdcom_list *rtdcom;
2777 struct snd_soc_component *component;
2778
2779 for_each_rtdcom(rtd, rtdcom) {
2780 component = rtdcom->component;
2781
2782 if (!component->driver->ops ||
2783 !component->driver->ops->copy_user)
2784 continue;
2785
2786 /* FIXME. it returns 1st copy now */
2787 return component->driver->ops->copy_user(substream, channel,
2788 pos, buf, bytes);
2789 }
2790
2791 return -EINVAL;
2792 }
2793
2794 static int soc_rtdcom_copy_kernel(struct snd_pcm_substream *substream, int channel,
2795 unsigned long pos, void *buf, unsigned long bytes)
2796 {
2797 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2798 struct snd_soc_rtdcom_list *rtdcom;
2799 struct snd_soc_component *component;
2800
2801 for_each_rtdcom(rtd, rtdcom) {
2802 component = rtdcom->component;
2803
2804 if (!component->driver->ops ||
2805 !component->driver->ops->copy_kernel)
2806 continue;
2807
2808 /* FIXME. it returns 1st copy now */
2809 return component->driver->ops->copy_kernel(substream, channel,
2810 pos, buf, bytes);
2811 }
2812
2813 return -EINVAL;
2814 }
2815
2816 static int soc_rtdcom_fill_silence(struct snd_pcm_substream *substream, int channel,
2817 unsigned long pos, unsigned long bytes)
2818 {
2819 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2820 struct snd_soc_rtdcom_list *rtdcom;
2821 struct snd_soc_component *component;
2822
2823 for_each_rtdcom(rtd, rtdcom) {
2824 component = rtdcom->component;
2825
2826 if (!component->driver->ops ||
2827 !component->driver->ops->fill_silence)
2828 continue;
2829
2830 /* FIXME. it returns 1st silence now */
2831 return component->driver->ops->fill_silence(substream, channel,
2832 pos, bytes);
2833 }
2834
2835 return -EINVAL;
2836 }
2837
2838 static struct page *soc_rtdcom_page(struct snd_pcm_substream *substream,
2839 unsigned long offset)
2840 {
2841 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2842 struct snd_soc_rtdcom_list *rtdcom;
2843 struct snd_soc_component *component;
2844 struct page *page;
2845
2846 for_each_rtdcom(rtd, rtdcom) {
2847 component = rtdcom->component;
2848
2849 if (!component->driver->ops ||
2850 !component->driver->ops->page)
2851 continue;
2852
2853 /* FIXME. it returns 1st page now */
2854 page = component->driver->ops->page(substream, offset);
2855 if (page)
2856 return page;
2857 }
2858
2859 return NULL;
2860 }
2861
2862 static int soc_rtdcom_mmap(struct snd_pcm_substream *substream,
2863 struct vm_area_struct *vma)
2864 {
2865 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2866 struct snd_soc_rtdcom_list *rtdcom;
2867 struct snd_soc_component *component;
2868
2869 for_each_rtdcom(rtd, rtdcom) {
2870 component = rtdcom->component;
2871
2872 if (!component->driver->ops ||
2873 !component->driver->ops->mmap)
2874 continue;
2875
2876 /* FIXME. it returns 1st mmap now */
2877 return component->driver->ops->mmap(substream, vma);
2878 }
2879
2880 return -EINVAL;
2881 }
2882
2883 /* create a new pcm */
2884 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2885 {
2886 struct snd_soc_dai *codec_dai;
2887 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2888 struct snd_soc_component *component;
2889 struct snd_soc_rtdcom_list *rtdcom;
2890 struct snd_pcm *pcm;
2891 char new_name[64];
2892 int ret = 0, playback = 0, capture = 0;
2893 int i;
2894
2895 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2896 playback = rtd->dai_link->dpcm_playback;
2897 capture = rtd->dai_link->dpcm_capture;
2898 } else {
2899 for (i = 0; i < rtd->num_codecs; i++) {
2900 codec_dai = rtd->codec_dais[i];
2901 if (codec_dai->driver->playback.channels_min)
2902 playback = 1;
2903 if (codec_dai->driver->capture.channels_min)
2904 capture = 1;
2905 }
2906
2907 capture = capture && cpu_dai->driver->capture.channels_min;
2908 playback = playback && cpu_dai->driver->playback.channels_min;
2909 }
2910
2911 if (rtd->dai_link->playback_only) {
2912 playback = 1;
2913 capture = 0;
2914 }
2915
2916 if (rtd->dai_link->capture_only) {
2917 playback = 0;
2918 capture = 1;
2919 }
2920
2921 /* create the PCM */
2922 if (rtd->dai_link->no_pcm) {
2923 snprintf(new_name, sizeof(new_name), "(%s)",
2924 rtd->dai_link->stream_name);
2925
2926 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2927 playback, capture, &pcm);
2928 } else {
2929 if (rtd->dai_link->dynamic)
2930 snprintf(new_name, sizeof(new_name), "%s (*)",
2931 rtd->dai_link->stream_name);
2932 else
2933 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2934 rtd->dai_link->stream_name,
2935 (rtd->num_codecs > 1) ?
2936 "multicodec" : rtd->codec_dai->name, num);
2937
2938 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2939 capture, &pcm);
2940 }
2941 if (ret < 0) {
2942 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2943 rtd->dai_link->name);
2944 return ret;
2945 }
2946 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2947
2948 /* DAPM dai link stream work */
2949 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
2950
2951 pcm->nonatomic = rtd->dai_link->nonatomic;
2952 rtd->pcm = pcm;
2953 pcm->private_data = rtd;
2954
2955 if (rtd->dai_link->no_pcm) {
2956 if (playback)
2957 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2958 if (capture)
2959 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2960 goto out;
2961 }
2962
2963 /* ASoC PCM operations */
2964 if (rtd->dai_link->dynamic) {
2965 rtd->ops.open = dpcm_fe_dai_open;
2966 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2967 rtd->ops.prepare = dpcm_fe_dai_prepare;
2968 rtd->ops.trigger = dpcm_fe_dai_trigger;
2969 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2970 rtd->ops.close = dpcm_fe_dai_close;
2971 rtd->ops.pointer = soc_pcm_pointer;
2972 rtd->ops.ioctl = soc_pcm_ioctl;
2973 } else {
2974 rtd->ops.open = soc_pcm_open;
2975 rtd->ops.hw_params = soc_pcm_hw_params;
2976 rtd->ops.prepare = soc_pcm_prepare;
2977 rtd->ops.trigger = soc_pcm_trigger;
2978 rtd->ops.hw_free = soc_pcm_hw_free;
2979 rtd->ops.close = soc_pcm_close;
2980 rtd->ops.pointer = soc_pcm_pointer;
2981 rtd->ops.ioctl = soc_pcm_ioctl;
2982 }
2983
2984 for_each_rtdcom(rtd, rtdcom) {
2985 const struct snd_pcm_ops *ops = rtdcom->component->driver->ops;
2986
2987 if (!ops)
2988 continue;
2989
2990 if (ops->ack)
2991 rtd->ops.ack = soc_rtdcom_ack;
2992 if (ops->copy_user)
2993 rtd->ops.copy_user = soc_rtdcom_copy_user;
2994 if (ops->copy_kernel)
2995 rtd->ops.copy_kernel = soc_rtdcom_copy_kernel;
2996 if (ops->fill_silence)
2997 rtd->ops.fill_silence = soc_rtdcom_fill_silence;
2998 if (ops->page)
2999 rtd->ops.page = soc_rtdcom_page;
3000 if (ops->mmap)
3001 rtd->ops.mmap = soc_rtdcom_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 for_each_rtdcom(rtd, rtdcom) {
3011 component = rtdcom->component;
3012
3013 if (!component->driver->pcm_new)
3014 continue;
3015
3016 ret = component->driver->pcm_new(rtd);
3017 if (ret < 0) {
3018 dev_err(component->dev,
3019 "ASoC: pcm constructor failed: %d\n",
3020 ret);
3021 return ret;
3022 }
3023 }
3024
3025 pcm->private_free = soc_pcm_private_free;
3026 out:
3027 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3028 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3029 cpu_dai->name);
3030 return ret;
3031 }
3032
3033 /* is the current PCM operation for this FE ? */
3034 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3035 {
3036 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3037 return 1;
3038 return 0;
3039 }
3040 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3041
3042 /* is the current PCM operation for this BE ? */
3043 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3044 struct snd_soc_pcm_runtime *be, int stream)
3045 {
3046 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3047 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3048 be->dpcm[stream].runtime_update))
3049 return 1;
3050 return 0;
3051 }
3052 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3053
3054 /* get the substream for this BE */
3055 struct snd_pcm_substream *
3056 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3057 {
3058 return be->pcm->streams[stream].substream;
3059 }
3060 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3061
3062 /* get the BE runtime state */
3063 enum snd_soc_dpcm_state
3064 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3065 {
3066 return be->dpcm[stream].state;
3067 }
3068 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3069
3070 /* set the BE runtime state */
3071 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3072 int stream, enum snd_soc_dpcm_state state)
3073 {
3074 be->dpcm[stream].state = state;
3075 }
3076 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3077
3078 /*
3079 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3080 * are not running, paused or suspended for the specified stream direction.
3081 */
3082 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3083 struct snd_soc_pcm_runtime *be, int stream)
3084 {
3085 struct snd_soc_dpcm *dpcm;
3086 int state;
3087
3088 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
3089
3090 if (dpcm->fe == fe)
3091 continue;
3092
3093 state = dpcm->fe->dpcm[stream].state;
3094 if (state == SND_SOC_DPCM_STATE_START ||
3095 state == SND_SOC_DPCM_STATE_PAUSED ||
3096 state == SND_SOC_DPCM_STATE_SUSPEND)
3097 return 0;
3098 }
3099
3100 /* it's safe to free/stop this BE DAI */
3101 return 1;
3102 }
3103 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3104
3105 /*
3106 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3107 * running, paused or suspended for the specified stream direction.
3108 */
3109 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3110 struct snd_soc_pcm_runtime *be, int stream)
3111 {
3112 struct snd_soc_dpcm *dpcm;
3113 int state;
3114
3115 list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
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 return 0;
3126 }
3127
3128 /* it's safe to change hw_params */
3129 return 1;
3130 }
3131 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3132
3133 #ifdef CONFIG_DEBUG_FS
3134 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3135 {
3136 switch (state) {
3137 case SND_SOC_DPCM_STATE_NEW:
3138 return "new";
3139 case SND_SOC_DPCM_STATE_OPEN:
3140 return "open";
3141 case SND_SOC_DPCM_STATE_HW_PARAMS:
3142 return "hw_params";
3143 case SND_SOC_DPCM_STATE_PREPARE:
3144 return "prepare";
3145 case SND_SOC_DPCM_STATE_START:
3146 return "start";
3147 case SND_SOC_DPCM_STATE_STOP:
3148 return "stop";
3149 case SND_SOC_DPCM_STATE_SUSPEND:
3150 return "suspend";
3151 case SND_SOC_DPCM_STATE_PAUSED:
3152 return "paused";
3153 case SND_SOC_DPCM_STATE_HW_FREE:
3154 return "hw_free";
3155 case SND_SOC_DPCM_STATE_CLOSE:
3156 return "close";
3157 }
3158
3159 return "unknown";
3160 }
3161
3162 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3163 int stream, char *buf, size_t size)
3164 {
3165 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3166 struct snd_soc_dpcm *dpcm;
3167 ssize_t offset = 0;
3168
3169 /* FE state */
3170 offset += snprintf(buf + offset, size - offset,
3171 "[%s - %s]\n", fe->dai_link->name,
3172 stream ? "Capture" : "Playback");
3173
3174 offset += snprintf(buf + offset, size - offset, "State: %s\n",
3175 dpcm_state_string(fe->dpcm[stream].state));
3176
3177 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3178 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3179 offset += snprintf(buf + offset, size - offset,
3180 "Hardware Params: "
3181 "Format = %s, Channels = %d, Rate = %d\n",
3182 snd_pcm_format_name(params_format(params)),
3183 params_channels(params),
3184 params_rate(params));
3185
3186 /* BEs state */
3187 offset += snprintf(buf + offset, size - offset, "Backends:\n");
3188
3189 if (list_empty(&fe->dpcm[stream].be_clients)) {
3190 offset += snprintf(buf + offset, size - offset,
3191 " No active DSP links\n");
3192 goto out;
3193 }
3194
3195 list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
3196 struct snd_soc_pcm_runtime *be = dpcm->be;
3197 params = &dpcm->hw_params;
3198
3199 offset += snprintf(buf + offset, size - offset,
3200 "- %s\n", be->dai_link->name);
3201
3202 offset += snprintf(buf + offset, size - offset,
3203 " State: %s\n",
3204 dpcm_state_string(be->dpcm[stream].state));
3205
3206 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3207 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3208 offset += snprintf(buf + offset, size - offset,
3209 " Hardware Params: "
3210 "Format = %s, Channels = %d, Rate = %d\n",
3211 snd_pcm_format_name(params_format(params)),
3212 params_channels(params),
3213 params_rate(params));
3214 }
3215
3216 out:
3217 return offset;
3218 }
3219
3220 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3221 size_t count, loff_t *ppos)
3222 {
3223 struct snd_soc_pcm_runtime *fe = file->private_data;
3224 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3225 char *buf;
3226
3227 buf = kmalloc(out_count, GFP_KERNEL);
3228 if (!buf)
3229 return -ENOMEM;
3230
3231 if (fe->cpu_dai->driver->playback.channels_min)
3232 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3233 buf + offset, out_count - offset);
3234
3235 if (fe->cpu_dai->driver->capture.channels_min)
3236 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3237 buf + offset, out_count - offset);
3238
3239 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3240
3241 kfree(buf);
3242 return ret;
3243 }
3244
3245 static const struct file_operations dpcm_state_fops = {
3246 .open = simple_open,
3247 .read = dpcm_state_read_file,
3248 .llseek = default_llseek,
3249 };
3250
3251 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3252 {
3253 if (!rtd->dai_link)
3254 return;
3255
3256 if (!rtd->card->debugfs_card_root)
3257 return;
3258
3259 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3260 rtd->card->debugfs_card_root);
3261 if (!rtd->debugfs_dpcm_root) {
3262 dev_dbg(rtd->dev,
3263 "ASoC: Failed to create dpcm debugfs directory %s\n",
3264 rtd->dai_link->name);
3265 return;
3266 }
3267
3268 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3269 rtd, &dpcm_state_fops);
3270 }
3271 #endif
Linux with added FPC-III support