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Merge tag 'for-linus-20190706' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / sound / soc / soc-pcm.c
blobc46ad0f662921210425ec78295a166301efb769b
1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // soc-pcm.c -- ALSA SoC PCM
4 //
5 // Copyright 2005 Wolfson Microelectronics PLC.
6 // Copyright 2005 Openedhand Ltd.
7 // Copyright (C) 2010 Slimlogic Ltd.
8 // Copyright (C) 2010 Texas Instruments Inc.
9 //
10 // Authors: Liam Girdwood <lrg@ti.com>
11 // Mark Brown <broonie@opensource.wolfsonmicro.com>
12
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/delay.h>
16 #include <linux/pinctrl/consumer.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/module.h>
19 #include <linux/slab.h>
20 #include <linux/workqueue.h>
21 #include <linux/export.h>
22 #include <linux/debugfs.h>
23 #include <sound/core.h>
24 #include <sound/pcm.h>
25 #include <sound/pcm_params.h>
26 #include <sound/soc.h>
27 #include <sound/soc-dpcm.h>
28 #include <sound/initval.h>
29
30 #define DPCM_MAX_BE_USERS 8
31
32 /*
33 * snd_soc_dai_stream_valid() - check if a DAI supports the given stream
34 *
35 * Returns true if the DAI supports the indicated stream type.
36 */
37 static bool snd_soc_dai_stream_valid(struct snd_soc_dai *dai, int stream)
38 {
39 struct snd_soc_pcm_stream *codec_stream;
40
41 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
42 codec_stream = &dai->driver->playback;
43 else
44 codec_stream = &dai->driver->capture;
45
46 /* If the codec specifies any channels at all, it supports the stream */
47 return codec_stream->channels_min;
48 }
49
50 /**
51 * snd_soc_runtime_activate() - Increment active count for PCM runtime components
52 * @rtd: ASoC PCM runtime that is activated
53 * @stream: Direction of the PCM stream
54 *
55 * Increments the active count for all the DAIs and components attached to a PCM
56 * runtime. Should typically be called when a stream is opened.
57 *
58 * Must be called with the rtd->pcm_mutex being held
59 */
60 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
61 {
62 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
63 struct snd_soc_dai *codec_dai;
64 int i;
65
66 lockdep_assert_held(&rtd->pcm_mutex);
67
68 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
69 cpu_dai->playback_active++;
70 for_each_rtd_codec_dai(rtd, i, codec_dai)
71 codec_dai->playback_active++;
72 } else {
73 cpu_dai->capture_active++;
74 for_each_rtd_codec_dai(rtd, i, codec_dai)
75 codec_dai->capture_active++;
76 }
77
78 cpu_dai->active++;
79 cpu_dai->component->active++;
80 for_each_rtd_codec_dai(rtd, i, codec_dai) {
81 codec_dai->active++;
82 codec_dai->component->active++;
83 }
84 }
85
86 /**
87 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
88 * @rtd: ASoC PCM runtime that is deactivated
89 * @stream: Direction of the PCM stream
90 *
91 * Decrements the active count for all the DAIs and components attached to a PCM
92 * runtime. Should typically be called when a stream is closed.
93 *
94 * Must be called with the rtd->pcm_mutex being held
95 */
96 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
97 {
98 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
99 struct snd_soc_dai *codec_dai;
100 int i;
101
102 lockdep_assert_held(&rtd->pcm_mutex);
103
104 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
105 cpu_dai->playback_active--;
106 for_each_rtd_codec_dai(rtd, i, codec_dai)
107 codec_dai->playback_active--;
108 } else {
109 cpu_dai->capture_active--;
110 for_each_rtd_codec_dai(rtd, i, codec_dai)
111 codec_dai->capture_active--;
112 }
113
114 cpu_dai->active--;
115 cpu_dai->component->active--;
116 for_each_rtd_codec_dai(rtd, i, codec_dai) {
117 codec_dai->component->active--;
118 codec_dai->active--;
119 }
120 }
121
122 /**
123 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
124 * @rtd: The ASoC PCM runtime that should be checked.
125 *
126 * This function checks whether the power down delay should be ignored for a
127 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
128 * been configured to ignore the delay, or if none of the components benefits
129 * from having the delay.
130 */
131 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
132 {
133 struct snd_soc_rtdcom_list *rtdcom;
134 struct snd_soc_component *component;
135 bool ignore = true;
136
137 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
138 return true;
139
140 for_each_rtdcom(rtd, rtdcom) {
141 component = rtdcom->component;
142
143 ignore &= !component->driver->use_pmdown_time;
144 }
145
146 return ignore;
147 }
148
149 /**
150 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
151 * @substream: the pcm substream
152 * @hw: the hardware parameters
153 *
154 * Sets the substream runtime hardware parameters.
155 */
156 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
157 const struct snd_pcm_hardware *hw)
158 {
159 struct snd_pcm_runtime *runtime = substream->runtime;
160 runtime->hw.info = hw->info;
161 runtime->hw.formats = hw->formats;
162 runtime->hw.period_bytes_min = hw->period_bytes_min;
163 runtime->hw.period_bytes_max = hw->period_bytes_max;
164 runtime->hw.periods_min = hw->periods_min;
165 runtime->hw.periods_max = hw->periods_max;
166 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
167 runtime->hw.fifo_size = hw->fifo_size;
168 return 0;
169 }
170 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
171
172 /* DPCM stream event, send event to FE and all active BEs. */
173 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
174 int event)
175 {
176 struct snd_soc_dpcm *dpcm;
177
178 for_each_dpcm_be(fe, dir, dpcm) {
179
180 struct snd_soc_pcm_runtime *be = dpcm->be;
181
182 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
183 be->dai_link->name, event, dir);
184
185 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
186 (be->dpcm[dir].users >= 1))
187 continue;
188
189 snd_soc_dapm_stream_event(be, dir, event);
190 }
191
192 snd_soc_dapm_stream_event(fe, dir, event);
193
194 return 0;
195 }
196
197 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
198 struct snd_soc_dai *soc_dai)
199 {
200 struct snd_soc_pcm_runtime *rtd = substream->private_data;
201 int ret;
202
203 if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
204 rtd->dai_link->symmetric_rates)) {
205 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
206 soc_dai->rate);
207
208 ret = snd_pcm_hw_constraint_single(substream->runtime,
209 SNDRV_PCM_HW_PARAM_RATE,
210 soc_dai->rate);
211 if (ret < 0) {
212 dev_err(soc_dai->dev,
213 "ASoC: Unable to apply rate constraint: %d\n",
214 ret);
215 return ret;
216 }
217 }
218
219 if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
220 rtd->dai_link->symmetric_channels)) {
221 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
222 soc_dai->channels);
223
224 ret = snd_pcm_hw_constraint_single(substream->runtime,
225 SNDRV_PCM_HW_PARAM_CHANNELS,
226 soc_dai->channels);
227 if (ret < 0) {
228 dev_err(soc_dai->dev,
229 "ASoC: Unable to apply channel symmetry constraint: %d\n",
230 ret);
231 return ret;
232 }
233 }
234
235 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
236 rtd->dai_link->symmetric_samplebits)) {
237 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
238 soc_dai->sample_bits);
239
240 ret = snd_pcm_hw_constraint_single(substream->runtime,
241 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
242 soc_dai->sample_bits);
243 if (ret < 0) {
244 dev_err(soc_dai->dev,
245 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
246 ret);
247 return ret;
248 }
249 }
250
251 return 0;
252 }
253
254 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
255 struct snd_pcm_hw_params *params)
256 {
257 struct snd_soc_pcm_runtime *rtd = substream->private_data;
258 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
259 struct snd_soc_dai *codec_dai;
260 unsigned int rate, channels, sample_bits, symmetry, i;
261
262 rate = params_rate(params);
263 channels = params_channels(params);
264 sample_bits = snd_pcm_format_physical_width(params_format(params));
265
266 /* reject unmatched parameters when applying symmetry */
267 symmetry = cpu_dai->driver->symmetric_rates ||
268 rtd->dai_link->symmetric_rates;
269
270 for_each_rtd_codec_dai(rtd, i, codec_dai)
271 symmetry |= codec_dai->driver->symmetric_rates;
272
273 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
274 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
275 cpu_dai->rate, rate);
276 return -EINVAL;
277 }
278
279 symmetry = cpu_dai->driver->symmetric_channels ||
280 rtd->dai_link->symmetric_channels;
281
282 for_each_rtd_codec_dai(rtd, i, codec_dai)
283 symmetry |= codec_dai->driver->symmetric_channels;
284
285 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
286 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
287 cpu_dai->channels, channels);
288 return -EINVAL;
289 }
290
291 symmetry = cpu_dai->driver->symmetric_samplebits ||
292 rtd->dai_link->symmetric_samplebits;
293
294 for_each_rtd_codec_dai(rtd, i, codec_dai)
295 symmetry |= codec_dai->driver->symmetric_samplebits;
296
297 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
298 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
299 cpu_dai->sample_bits, sample_bits);
300 return -EINVAL;
301 }
302
303 return 0;
304 }
305
306 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
307 {
308 struct snd_soc_pcm_runtime *rtd = substream->private_data;
309 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
310 struct snd_soc_dai_link *link = rtd->dai_link;
311 struct snd_soc_dai *codec_dai;
312 unsigned int symmetry, i;
313
314 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
315 cpu_driver->symmetric_channels || link->symmetric_channels ||
316 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
317
318 for_each_rtd_codec_dai(rtd, i, codec_dai)
319 symmetry = symmetry ||
320 codec_dai->driver->symmetric_rates ||
321 codec_dai->driver->symmetric_channels ||
322 codec_dai->driver->symmetric_samplebits;
323
324 return symmetry;
325 }
326
327 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
328 {
329 struct snd_soc_pcm_runtime *rtd = substream->private_data;
330 int ret;
331
332 if (!bits)
333 return;
334
335 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
336 if (ret != 0)
337 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
338 bits, ret);
339 }
340
341 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
342 {
343 struct snd_soc_pcm_runtime *rtd = substream->private_data;
344 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
345 struct snd_soc_dai *codec_dai;
346 int i;
347 unsigned int bits = 0, cpu_bits;
348
349 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
350 for_each_rtd_codec_dai(rtd, i, codec_dai) {
351 if (codec_dai->driver->playback.sig_bits == 0) {
352 bits = 0;
353 break;
354 }
355 bits = max(codec_dai->driver->playback.sig_bits, bits);
356 }
357 cpu_bits = cpu_dai->driver->playback.sig_bits;
358 } else {
359 for_each_rtd_codec_dai(rtd, i, codec_dai) {
360 if (codec_dai->driver->capture.sig_bits == 0) {
361 bits = 0;
362 break;
363 }
364 bits = max(codec_dai->driver->capture.sig_bits, bits);
365 }
366 cpu_bits = cpu_dai->driver->capture.sig_bits;
367 }
368
369 soc_pcm_set_msb(substream, bits);
370 soc_pcm_set_msb(substream, cpu_bits);
371 }
372
373 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
374 {
375 struct snd_pcm_runtime *runtime = substream->runtime;
376 struct snd_pcm_hardware *hw = &runtime->hw;
377 struct snd_soc_pcm_runtime *rtd = substream->private_data;
378 struct snd_soc_dai *codec_dai;
379 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
380 struct snd_soc_dai_driver *codec_dai_drv;
381 struct snd_soc_pcm_stream *codec_stream;
382 struct snd_soc_pcm_stream *cpu_stream;
383 unsigned int chan_min = 0, chan_max = UINT_MAX;
384 unsigned int rate_min = 0, rate_max = UINT_MAX;
385 unsigned int rates = UINT_MAX;
386 u64 formats = ULLONG_MAX;
387 int i;
388
389 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
390 cpu_stream = &cpu_dai_drv->playback;
391 else
392 cpu_stream = &cpu_dai_drv->capture;
393
394 /* first calculate min/max only for CODECs in the DAI link */
395 for_each_rtd_codec_dai(rtd, i, codec_dai) {
396
397 /*
398 * Skip CODECs which don't support the current stream type.
399 * Otherwise, since the rate, channel, and format values will
400 * zero in that case, we would have no usable settings left,
401 * causing the resulting setup to fail.
402 * At least one CODEC should match, otherwise we should have
403 * bailed out on a higher level, since there would be no
404 * CODEC to support the transfer direction in that case.
405 */
406 if (!snd_soc_dai_stream_valid(codec_dai,
407 substream->stream))
408 continue;
409
410 codec_dai_drv = codec_dai->driver;
411 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
412 codec_stream = &codec_dai_drv->playback;
413 else
414 codec_stream = &codec_dai_drv->capture;
415 chan_min = max(chan_min, codec_stream->channels_min);
416 chan_max = min(chan_max, codec_stream->channels_max);
417 rate_min = max(rate_min, codec_stream->rate_min);
418 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
419 formats &= codec_stream->formats;
420 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
421 }
422
423 /*
424 * chan min/max cannot be enforced if there are multiple CODEC DAIs
425 * connected to a single CPU DAI, use CPU DAI's directly and let
426 * channel allocation be fixed up later
427 */
428 if (rtd->num_codecs > 1) {
429 chan_min = cpu_stream->channels_min;
430 chan_max = cpu_stream->channels_max;
431 }
432
433 hw->channels_min = max(chan_min, cpu_stream->channels_min);
434 hw->channels_max = min(chan_max, cpu_stream->channels_max);
435 if (hw->formats)
436 hw->formats &= formats & cpu_stream->formats;
437 else
438 hw->formats = formats & cpu_stream->formats;
439 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
440
441 snd_pcm_limit_hw_rates(runtime);
442
443 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
444 hw->rate_min = max(hw->rate_min, rate_min);
445 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
446 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
447 }
448
449 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
450 struct snd_soc_component *last)
451 {
452 struct snd_soc_pcm_runtime *rtd = substream->private_data;
453 struct snd_soc_rtdcom_list *rtdcom;
454 struct snd_soc_component *component;
455
456 for_each_rtdcom(rtd, rtdcom) {
457 component = rtdcom->component;
458
459 if (component == last)
460 break;
461
462 if (!component->driver->ops ||
463 !component->driver->ops->close)
464 continue;
465
466 component->driver->ops->close(substream);
467
468 if (component->driver->module_get_upon_open)
469 module_put(component->dev->driver->owner);
470 }
471
472 return 0;
473 }
474
475 /*
476 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
477 * then initialized and any private data can be allocated. This also calls
478 * startup for the cpu DAI, component, machine and codec DAI.
479 */
480 static int soc_pcm_open(struct snd_pcm_substream *substream)
481 {
482 struct snd_soc_pcm_runtime *rtd = substream->private_data;
483 struct snd_pcm_runtime *runtime = substream->runtime;
484 struct snd_soc_component *component;
485 struct snd_soc_rtdcom_list *rtdcom;
486 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
487 struct snd_soc_dai *codec_dai;
488 const char *codec_dai_name = "multicodec";
489 int i, ret = 0;
490
491 pinctrl_pm_select_default_state(cpu_dai->dev);
492 for_each_rtd_codec_dai(rtd, i, codec_dai)
493 pinctrl_pm_select_default_state(codec_dai->dev);
494
495 for_each_rtdcom(rtd, rtdcom) {
496 component = rtdcom->component;
497
498 pm_runtime_get_sync(component->dev);
499 }
500
501 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
502
503 /* startup the audio subsystem */
504 if (cpu_dai->driver->ops->startup) {
505 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
506 if (ret < 0) {
507 dev_err(cpu_dai->dev, "ASoC: can't open interface"
508 " %s: %d\n", cpu_dai->name, ret);
509 goto out;
510 }
511 }
512
513 for_each_rtdcom(rtd, rtdcom) {
514 component = rtdcom->component;
515
516 if (!component->driver->ops ||
517 !component->driver->ops->open)
518 continue;
519
520 if (component->driver->module_get_upon_open &&
521 !try_module_get(component->dev->driver->owner)) {
522 ret = -ENODEV;
523 goto module_err;
524 }
525
526 ret = component->driver->ops->open(substream);
527 if (ret < 0) {
528 dev_err(component->dev,
529 "ASoC: can't open component %s: %d\n",
530 component->name, ret);
531 goto component_err;
532 }
533 }
534 component = NULL;
535
536 for_each_rtd_codec_dai(rtd, i, codec_dai) {
537 if (codec_dai->driver->ops->startup) {
538 ret = codec_dai->driver->ops->startup(substream,
539 codec_dai);
540 if (ret < 0) {
541 dev_err(codec_dai->dev,
542 "ASoC: can't open codec %s: %d\n",
543 codec_dai->name, ret);
544 goto codec_dai_err;
545 }
546 }
547
548 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
549 codec_dai->tx_mask = 0;
550 else
551 codec_dai->rx_mask = 0;
552 }
553
554 if (rtd->dai_link->ops->startup) {
555 ret = rtd->dai_link->ops->startup(substream);
556 if (ret < 0) {
557 pr_err("ASoC: %s startup failed: %d\n",
558 rtd->dai_link->name, ret);
559 goto machine_err;
560 }
561 }
562
563 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
564 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
565 goto dynamic;
566
567 /* Check that the codec and cpu DAIs are compatible */
568 soc_pcm_init_runtime_hw(substream);
569
570 if (rtd->num_codecs == 1)
571 codec_dai_name = rtd->codec_dai->name;
572
573 if (soc_pcm_has_symmetry(substream))
574 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
575
576 ret = -EINVAL;
577 if (!runtime->hw.rates) {
578 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
579 codec_dai_name, cpu_dai->name);
580 goto config_err;
581 }
582 if (!runtime->hw.formats) {
583 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
584 codec_dai_name, cpu_dai->name);
585 goto config_err;
586 }
587 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
588 runtime->hw.channels_min > runtime->hw.channels_max) {
589 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
590 codec_dai_name, cpu_dai->name);
591 goto config_err;
592 }
593
594 soc_pcm_apply_msb(substream);
595
596 /* Symmetry only applies if we've already got an active stream. */
597 if (cpu_dai->active) {
598 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
599 if (ret != 0)
600 goto config_err;
601 }
602
603 for_each_rtd_codec_dai(rtd, i, codec_dai) {
604 if (codec_dai->active) {
605 ret = soc_pcm_apply_symmetry(substream, codec_dai);
606 if (ret != 0)
607 goto config_err;
608 }
609 }
610
611 pr_debug("ASoC: %s <-> %s info:\n",
612 codec_dai_name, cpu_dai->name);
613 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
614 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
615 runtime->hw.channels_max);
616 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
617 runtime->hw.rate_max);
618
619 dynamic:
620
621 snd_soc_runtime_activate(rtd, substream->stream);
622
623 mutex_unlock(&rtd->pcm_mutex);
624 return 0;
625
626 config_err:
627 if (rtd->dai_link->ops->shutdown)
628 rtd->dai_link->ops->shutdown(substream);
629
630 machine_err:
631 i = rtd->num_codecs;
632
633 codec_dai_err:
634 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
635 if (codec_dai->driver->ops->shutdown)
636 codec_dai->driver->ops->shutdown(substream, codec_dai);
637 }
638
639 component_err:
640 soc_pcm_components_close(substream, component);
641 module_err:
642 if (cpu_dai->driver->ops->shutdown)
643 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
644 out:
645 mutex_unlock(&rtd->pcm_mutex);
646
647 for_each_rtdcom(rtd, rtdcom) {
648 component = rtdcom->component;
649
650 pm_runtime_mark_last_busy(component->dev);
651 pm_runtime_put_autosuspend(component->dev);
652 }
653
654 for_each_rtd_codec_dai(rtd, i, codec_dai) {
655 if (!codec_dai->active)
656 pinctrl_pm_select_sleep_state(codec_dai->dev);
657 }
658 if (!cpu_dai->active)
659 pinctrl_pm_select_sleep_state(cpu_dai->dev);
660
661 return ret;
662 }
663
664 /*
665 * Power down the audio subsystem pmdown_time msecs after close is called.
666 * This is to ensure there are no pops or clicks in between any music tracks
667 * due to DAPM power cycling.
668 */
669 static void close_delayed_work(struct work_struct *work)
670 {
671 struct snd_soc_pcm_runtime *rtd =
672 container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
673 struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
674
675 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
676
677 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
678 codec_dai->driver->playback.stream_name,
679 codec_dai->playback_active ? "active" : "inactive",
680 rtd->pop_wait ? "yes" : "no");
681
682 /* are we waiting on this codec DAI stream */
683 if (rtd->pop_wait == 1) {
684 rtd->pop_wait = 0;
685 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
686 SND_SOC_DAPM_STREAM_STOP);
687 }
688
689 mutex_unlock(&rtd->pcm_mutex);
690 }
691
692 /*
693 * Called by ALSA when a PCM substream is closed. Private data can be
694 * freed here. The cpu DAI, codec DAI, machine and components are also
695 * shutdown.
696 */
697 static int soc_pcm_close(struct snd_pcm_substream *substream)
698 {
699 struct snd_soc_pcm_runtime *rtd = substream->private_data;
700 struct snd_soc_component *component;
701 struct snd_soc_rtdcom_list *rtdcom;
702 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
703 struct snd_soc_dai *codec_dai;
704 int i;
705
706 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
707
708 snd_soc_runtime_deactivate(rtd, substream->stream);
709
710 /* clear the corresponding DAIs rate when inactive */
711 if (!cpu_dai->active)
712 cpu_dai->rate = 0;
713
714 for_each_rtd_codec_dai(rtd, i, codec_dai) {
715 if (!codec_dai->active)
716 codec_dai->rate = 0;
717 }
718
719 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
720
721 if (cpu_dai->driver->ops->shutdown)
722 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
723
724 for_each_rtd_codec_dai(rtd, i, codec_dai) {
725 if (codec_dai->driver->ops->shutdown)
726 codec_dai->driver->ops->shutdown(substream, codec_dai);
727 }
728
729 if (rtd->dai_link->ops->shutdown)
730 rtd->dai_link->ops->shutdown(substream);
731
732 soc_pcm_components_close(substream, NULL);
733
734 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
735 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
736 /* powered down playback stream now */
737 snd_soc_dapm_stream_event(rtd,
738 SNDRV_PCM_STREAM_PLAYBACK,
739 SND_SOC_DAPM_STREAM_STOP);
740 } else {
741 /* start delayed pop wq here for playback streams */
742 rtd->pop_wait = 1;
743 queue_delayed_work(system_power_efficient_wq,
744 &rtd->delayed_work,
745 msecs_to_jiffies(rtd->pmdown_time));
746 }
747 } else {
748 /* capture streams can be powered down now */
749 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
750 SND_SOC_DAPM_STREAM_STOP);
751 }
752
753 mutex_unlock(&rtd->pcm_mutex);
754
755 for_each_rtdcom(rtd, rtdcom) {
756 component = rtdcom->component;
757
758 pm_runtime_mark_last_busy(component->dev);
759 pm_runtime_put_autosuspend(component->dev);
760 }
761
762 for_each_rtd_codec_dai(rtd, i, codec_dai) {
763 if (!codec_dai->active)
764 pinctrl_pm_select_sleep_state(codec_dai->dev);
765 }
766 if (!cpu_dai->active)
767 pinctrl_pm_select_sleep_state(cpu_dai->dev);
768
769 return 0;
770 }
771
772 /*
773 * Called by ALSA when the PCM substream is prepared, can set format, sample
774 * rate, etc. This function is non atomic and can be called multiple times,
775 * it can refer to the runtime info.
776 */
777 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
778 {
779 struct snd_soc_pcm_runtime *rtd = substream->private_data;
780 struct snd_soc_component *component;
781 struct snd_soc_rtdcom_list *rtdcom;
782 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
783 struct snd_soc_dai *codec_dai;
784 int i, ret = 0;
785
786 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
787
788 if (rtd->dai_link->ops->prepare) {
789 ret = rtd->dai_link->ops->prepare(substream);
790 if (ret < 0) {
791 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
792 " %d\n", ret);
793 goto out;
794 }
795 }
796
797 for_each_rtdcom(rtd, rtdcom) {
798 component = rtdcom->component;
799
800 if (!component->driver->ops ||
801 !component->driver->ops->prepare)
802 continue;
803
804 ret = component->driver->ops->prepare(substream);
805 if (ret < 0) {
806 dev_err(component->dev,
807 "ASoC: platform prepare error: %d\n", ret);
808 goto out;
809 }
810 }
811
812 for_each_rtd_codec_dai(rtd, i, codec_dai) {
813 if (codec_dai->driver->ops->prepare) {
814 ret = codec_dai->driver->ops->prepare(substream,
815 codec_dai);
816 if (ret < 0) {
817 dev_err(codec_dai->dev,
818 "ASoC: codec DAI prepare error: %d\n",
819 ret);
820 goto out;
821 }
822 }
823 }
824
825 if (cpu_dai->driver->ops->prepare) {
826 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
827 if (ret < 0) {
828 dev_err(cpu_dai->dev,
829 "ASoC: cpu DAI prepare error: %d\n", ret);
830 goto out;
831 }
832 }
833
834 /* cancel any delayed stream shutdown that is pending */
835 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
836 rtd->pop_wait) {
837 rtd->pop_wait = 0;
838 cancel_delayed_work(&rtd->delayed_work);
839 }
840
841 snd_soc_dapm_stream_event(rtd, substream->stream,
842 SND_SOC_DAPM_STREAM_START);
843
844 for_each_rtd_codec_dai(rtd, i, codec_dai)
845 snd_soc_dai_digital_mute(codec_dai, 0,
846 substream->stream);
847 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
848
849 out:
850 mutex_unlock(&rtd->pcm_mutex);
851 return ret;
852 }
853
854 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
855 unsigned int mask)
856 {
857 struct snd_interval *interval;
858 int channels = hweight_long(mask);
859
860 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
861 interval->min = channels;
862 interval->max = channels;
863 }
864
865 int soc_dai_hw_params(struct snd_pcm_substream *substream,
866 struct snd_pcm_hw_params *params,
867 struct snd_soc_dai *dai)
868 {
869 struct snd_soc_pcm_runtime *rtd = substream->private_data;
870 int ret;
871
872 /* perform any topology hw_params fixups before DAI */
873 if (rtd->dai_link->be_hw_params_fixup) {
874 ret = rtd->dai_link->be_hw_params_fixup(rtd, params);
875 if (ret < 0) {
876 dev_err(rtd->dev,
877 "ASoC: hw_params topology fixup failed %d\n",
878 ret);
879 return ret;
880 }
881 }
882
883 if (dai->driver->ops->hw_params) {
884 ret = dai->driver->ops->hw_params(substream, params, dai);
885 if (ret < 0) {
886 dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
887 dai->name, ret);
888 return ret;
889 }
890 }
891
892 return 0;
893 }
894
895 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
896 struct snd_soc_component *last)
897 {
898 struct snd_soc_pcm_runtime *rtd = substream->private_data;
899 struct snd_soc_rtdcom_list *rtdcom;
900 struct snd_soc_component *component;
901
902 for_each_rtdcom(rtd, rtdcom) {
903 component = rtdcom->component;
904
905 if (component == last)
906 break;
907
908 if (!component->driver->ops ||
909 !component->driver->ops->hw_free)
910 continue;
911
912 component->driver->ops->hw_free(substream);
913 }
914
915 return 0;
916 }
917
918 /*
919 * Called by ALSA when the hardware params are set by application. This
920 * function can also be called multiple times and can allocate buffers
921 * (using snd_pcm_lib_* ). It's non-atomic.
922 */
923 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
924 struct snd_pcm_hw_params *params)
925 {
926 struct snd_soc_pcm_runtime *rtd = substream->private_data;
927 struct snd_soc_component *component;
928 struct snd_soc_rtdcom_list *rtdcom;
929 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
930 struct snd_soc_dai *codec_dai;
931 int i, ret = 0;
932
933 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
934 if (rtd->dai_link->ops->hw_params) {
935 ret = rtd->dai_link->ops->hw_params(substream, params);
936 if (ret < 0) {
937 dev_err(rtd->card->dev, "ASoC: machine hw_params"
938 " failed: %d\n", ret);
939 goto out;
940 }
941 }
942
943 for_each_rtd_codec_dai(rtd, i, codec_dai) {
944 struct snd_pcm_hw_params codec_params;
945
946 /*
947 * Skip CODECs which don't support the current stream type,
948 * the idea being that if a CODEC is not used for the currently
949 * set up transfer direction, it should not need to be
950 * configured, especially since the configuration used might
951 * not even be supported by that CODEC. There may be cases
952 * however where a CODEC needs to be set up although it is
953 * actually not being used for the transfer, e.g. if a
954 * capture-only CODEC is acting as an LRCLK and/or BCLK master
955 * for the DAI link including a playback-only CODEC.
956 * If this becomes necessary, we will have to augment the
957 * machine driver setup with information on how to act, so
958 * we can do the right thing here.
959 */
960 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
961 continue;
962
963 /* copy params for each codec */
964 codec_params = *params;
965
966 /* fixup params based on TDM slot masks */
967 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
968 codec_dai->tx_mask)
969 soc_pcm_codec_params_fixup(&codec_params,
970 codec_dai->tx_mask);
971
972 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
973 codec_dai->rx_mask)
974 soc_pcm_codec_params_fixup(&codec_params,
975 codec_dai->rx_mask);
976
977 ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
978 if(ret < 0)
979 goto codec_err;
980
981 codec_dai->rate = params_rate(&codec_params);
982 codec_dai->channels = params_channels(&codec_params);
983 codec_dai->sample_bits = snd_pcm_format_physical_width(
984 params_format(&codec_params));
985
986 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
987 }
988
989 ret = soc_dai_hw_params(substream, params, cpu_dai);
990 if (ret < 0)
991 goto interface_err;
992
993 for_each_rtdcom(rtd, rtdcom) {
994 component = rtdcom->component;
995
996 if (!component->driver->ops ||
997 !component->driver->ops->hw_params)
998 continue;
999
1000 ret = component->driver->ops->hw_params(substream, params);
1001 if (ret < 0) {
1002 dev_err(component->dev,
1003 "ASoC: %s hw params failed: %d\n",
1004 component->name, ret);
1005 goto component_err;
1006 }
1007 }
1008 component = NULL;
1009
1010 /* store the parameters for each DAIs */
1011 cpu_dai->rate = params_rate(params);
1012 cpu_dai->channels = params_channels(params);
1013 cpu_dai->sample_bits =
1014 snd_pcm_format_physical_width(params_format(params));
1015
1016 snd_soc_dapm_update_dai(substream, params, cpu_dai);
1017
1018 ret = soc_pcm_params_symmetry(substream, params);
1019 if (ret)
1020 goto component_err;
1021 out:
1022 mutex_unlock(&rtd->pcm_mutex);
1023 return ret;
1024
1025 component_err:
1026 soc_pcm_components_hw_free(substream, component);
1027
1028 if (cpu_dai->driver->ops->hw_free)
1029 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1030
1031 interface_err:
1032 i = rtd->num_codecs;
1033
1034 codec_err:
1035 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
1036 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1037 continue;
1038
1039 if (codec_dai->driver->ops->hw_free)
1040 codec_dai->driver->ops->hw_free(substream, codec_dai);
1041 codec_dai->rate = 0;
1042 }
1043
1044 if (rtd->dai_link->ops->hw_free)
1045 rtd->dai_link->ops->hw_free(substream);
1046
1047 mutex_unlock(&rtd->pcm_mutex);
1048 return ret;
1049 }
1050
1051 /*
1052 * Frees resources allocated by hw_params, can be called multiple times
1053 */
1054 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
1055 {
1056 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1057 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1058 struct snd_soc_dai *codec_dai;
1059 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
1060 int i;
1061
1062 mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
1063
1064 /* clear the corresponding DAIs parameters when going to be inactive */
1065 if (cpu_dai->active == 1) {
1066 cpu_dai->rate = 0;
1067 cpu_dai->channels = 0;
1068 cpu_dai->sample_bits = 0;
1069 }
1070
1071 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1072 if (codec_dai->active == 1) {
1073 codec_dai->rate = 0;
1074 codec_dai->channels = 0;
1075 codec_dai->sample_bits = 0;
1076 }
1077 }
1078
1079 /* apply codec digital mute */
1080 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1081 if ((playback && codec_dai->playback_active == 1) ||
1082 (!playback && codec_dai->capture_active == 1))
1083 snd_soc_dai_digital_mute(codec_dai, 1,
1084 substream->stream);
1085 }
1086
1087 /* free any machine hw params */
1088 if (rtd->dai_link->ops->hw_free)
1089 rtd->dai_link->ops->hw_free(substream);
1090
1091 /* free any component resources */
1092 soc_pcm_components_hw_free(substream, NULL);
1093
1094 /* now free hw params for the DAIs */
1095 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1096 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1097 continue;
1098
1099 if (codec_dai->driver->ops->hw_free)
1100 codec_dai->driver->ops->hw_free(substream, codec_dai);
1101 }
1102
1103 if (cpu_dai->driver->ops->hw_free)
1104 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
1105
1106 mutex_unlock(&rtd->pcm_mutex);
1107 return 0;
1108 }
1109
1110 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1111 {
1112 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1113 struct snd_soc_component *component;
1114 struct snd_soc_rtdcom_list *rtdcom;
1115 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1116 struct snd_soc_dai *codec_dai;
1117 int i, ret;
1118
1119 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1120 if (codec_dai->driver->ops->trigger) {
1121 ret = codec_dai->driver->ops->trigger(substream,
1122 cmd, codec_dai);
1123 if (ret < 0)
1124 return ret;
1125 }
1126 }
1127
1128 for_each_rtdcom(rtd, rtdcom) {
1129 component = rtdcom->component;
1130
1131 if (!component->driver->ops ||
1132 !component->driver->ops->trigger)
1133 continue;
1134
1135 ret = component->driver->ops->trigger(substream, cmd);
1136 if (ret < 0)
1137 return ret;
1138 }
1139
1140 if (cpu_dai->driver->ops->trigger) {
1141 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
1142 if (ret < 0)
1143 return ret;
1144 }
1145
1146 if (rtd->dai_link->ops->trigger) {
1147 ret = rtd->dai_link->ops->trigger(substream, cmd);
1148 if (ret < 0)
1149 return ret;
1150 }
1151
1152 return 0;
1153 }
1154
1155 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1156 int cmd)
1157 {
1158 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1159 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1160 struct snd_soc_dai *codec_dai;
1161 int i, ret;
1162
1163 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1164 if (codec_dai->driver->ops->bespoke_trigger) {
1165 ret = codec_dai->driver->ops->bespoke_trigger(substream,
1166 cmd, codec_dai);
1167 if (ret < 0)
1168 return ret;
1169 }
1170 }
1171
1172 if (cpu_dai->driver->ops->bespoke_trigger) {
1173 ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai);
1174 if (ret < 0)
1175 return ret;
1176 }
1177 return 0;
1178 }
1179 /*
1180 * soc level wrapper for pointer callback
1181 * If cpu_dai, codec_dai, component driver has the delay callback, then
1182 * the runtime->delay will be updated accordingly.
1183 */
1184 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1185 {
1186 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1187 struct snd_soc_component *component;
1188 struct snd_soc_rtdcom_list *rtdcom;
1189 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1190 struct snd_soc_dai *codec_dai;
1191 struct snd_pcm_runtime *runtime = substream->runtime;
1192 snd_pcm_uframes_t offset = 0;
1193 snd_pcm_sframes_t delay = 0;
1194 snd_pcm_sframes_t codec_delay = 0;
1195 int i;
1196
1197 /* clearing the previous total delay */
1198 runtime->delay = 0;
1199
1200 for_each_rtdcom(rtd, rtdcom) {
1201 component = rtdcom->component;
1202
1203 if (!component->driver->ops ||
1204 !component->driver->ops->pointer)
1205 continue;
1206
1207 /* FIXME: use 1st pointer */
1208 offset = component->driver->ops->pointer(substream);
1209 break;
1210 }
1211 /* base delay if assigned in pointer callback */
1212 delay = runtime->delay;
1213
1214 if (cpu_dai->driver->ops->delay)
1215 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1216
1217 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1218 if (codec_dai->driver->ops->delay)
1219 codec_delay = max(codec_delay,
1220 codec_dai->driver->ops->delay(substream,
1221 codec_dai));
1222 }
1223 delay += codec_delay;
1224
1225 runtime->delay = delay;
1226
1227 return offset;
1228 }
1229
1230 /* connect a FE and BE */
1231 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1232 struct snd_soc_pcm_runtime *be, int stream)
1233 {
1234 struct snd_soc_dpcm *dpcm;
1235 unsigned long flags;
1236
1237 /* only add new dpcms */
1238 for_each_dpcm_be(fe, stream, dpcm) {
1239 if (dpcm->be == be && dpcm->fe == fe)
1240 return 0;
1241 }
1242
1243 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1244 if (!dpcm)
1245 return -ENOMEM;
1246
1247 dpcm->be = be;
1248 dpcm->fe = fe;
1249 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1250 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1251 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1252 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1253 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1254 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1255
1256 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1257 stream ? "capture" : "playback", fe->dai_link->name,
1258 stream ? "<-" : "->", be->dai_link->name);
1259
1260 #ifdef CONFIG_DEBUG_FS
1261 if (fe->debugfs_dpcm_root)
1262 dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
1263 fe->debugfs_dpcm_root, &dpcm->state);
1264 #endif
1265 return 1;
1266 }
1267
1268 /* reparent a BE onto another FE */
1269 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1270 struct snd_soc_pcm_runtime *be, int stream)
1271 {
1272 struct snd_soc_dpcm *dpcm;
1273 struct snd_pcm_substream *fe_substream, *be_substream;
1274
1275 /* reparent if BE is connected to other FEs */
1276 if (!be->dpcm[stream].users)
1277 return;
1278
1279 be_substream = snd_soc_dpcm_get_substream(be, stream);
1280
1281 for_each_dpcm_fe(be, stream, dpcm) {
1282 if (dpcm->fe == fe)
1283 continue;
1284
1285 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1286 stream ? "capture" : "playback",
1287 dpcm->fe->dai_link->name,
1288 stream ? "<-" : "->", dpcm->be->dai_link->name);
1289
1290 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1291 be_substream->runtime = fe_substream->runtime;
1292 break;
1293 }
1294 }
1295
1296 /* disconnect a BE and FE */
1297 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1298 {
1299 struct snd_soc_dpcm *dpcm, *d;
1300 unsigned long flags;
1301
1302 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1303 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1304 stream ? "capture" : "playback",
1305 dpcm->be->dai_link->name);
1306
1307 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1308 continue;
1309
1310 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1311 stream ? "capture" : "playback", fe->dai_link->name,
1312 stream ? "<-" : "->", dpcm->be->dai_link->name);
1313
1314 /* BEs still alive need new FE */
1315 dpcm_be_reparent(fe, dpcm->be, stream);
1316
1317 #ifdef CONFIG_DEBUG_FS
1318 debugfs_remove(dpcm->debugfs_state);
1319 #endif
1320 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1321 list_del(&dpcm->list_be);
1322 list_del(&dpcm->list_fe);
1323 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1324 kfree(dpcm);
1325 }
1326 }
1327
1328 /* get BE for DAI widget and stream */
1329 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1330 struct snd_soc_dapm_widget *widget, int stream)
1331 {
1332 struct snd_soc_pcm_runtime *be;
1333 struct snd_soc_dai *dai;
1334 int i;
1335
1336 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1337
1338 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1339 for_each_card_rtds(card, be) {
1340
1341 if (!be->dai_link->no_pcm)
1342 continue;
1343
1344 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1345 be->cpu_dai->playback_widget ?
1346 be->cpu_dai->playback_widget->name : "(not set)");
1347
1348 if (be->cpu_dai->playback_widget == widget)
1349 return be;
1350
1351 for_each_rtd_codec_dai(be, i, dai) {
1352 if (dai->playback_widget == widget)
1353 return be;
1354 }
1355 }
1356 } else {
1357
1358 for_each_card_rtds(card, be) {
1359
1360 if (!be->dai_link->no_pcm)
1361 continue;
1362
1363 dev_dbg(card->dev, "ASoC: try BE %s\n",
1364 be->cpu_dai->capture_widget ?
1365 be->cpu_dai->capture_widget->name : "(not set)");
1366
1367 if (be->cpu_dai->capture_widget == widget)
1368 return be;
1369
1370 for_each_rtd_codec_dai(be, i, dai) {
1371 if (dai->capture_widget == widget)
1372 return be;
1373 }
1374 }
1375 }
1376
1377 /* dai link name and stream name set correctly ? */
1378 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1379 stream ? "capture" : "playback", widget->name);
1380 return NULL;
1381 }
1382
1383 static inline struct snd_soc_dapm_widget *
1384 dai_get_widget(struct snd_soc_dai *dai, int stream)
1385 {
1386 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1387 return dai->playback_widget;
1388 else
1389 return dai->capture_widget;
1390 }
1391
1392 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1393 struct snd_soc_dapm_widget *widget)
1394 {
1395 int i;
1396
1397 for (i = 0; i < list->num_widgets; i++) {
1398 if (widget == list->widgets[i])
1399 return 1;
1400 }
1401
1402 return 0;
1403 }
1404
1405 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1406 enum snd_soc_dapm_direction dir)
1407 {
1408 struct snd_soc_card *card = widget->dapm->card;
1409 struct snd_soc_pcm_runtime *rtd;
1410 struct snd_soc_dai *dai;
1411 int i;
1412
1413 if (dir == SND_SOC_DAPM_DIR_OUT) {
1414 for_each_card_rtds(card, rtd) {
1415 if (!rtd->dai_link->no_pcm)
1416 continue;
1417
1418 if (rtd->cpu_dai->playback_widget == widget)
1419 return true;
1420
1421 for_each_rtd_codec_dai(rtd, i, dai) {
1422 if (dai->playback_widget == widget)
1423 return true;
1424 }
1425 }
1426 } else { /* SND_SOC_DAPM_DIR_IN */
1427 for_each_card_rtds(card, rtd) {
1428 if (!rtd->dai_link->no_pcm)
1429 continue;
1430
1431 if (rtd->cpu_dai->capture_widget == widget)
1432 return true;
1433
1434 for_each_rtd_codec_dai(rtd, i, dai) {
1435 if (dai->capture_widget == widget)
1436 return true;
1437 }
1438 }
1439 }
1440
1441 return false;
1442 }
1443
1444 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1445 int stream, struct snd_soc_dapm_widget_list **list)
1446 {
1447 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1448 int paths;
1449
1450 /* get number of valid DAI paths and their widgets */
1451 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1452 dpcm_end_walk_at_be);
1453
1454 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1455 stream ? "capture" : "playback");
1456
1457 return paths;
1458 }
1459
1460 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1461 struct snd_soc_dapm_widget_list **list_)
1462 {
1463 struct snd_soc_dpcm *dpcm;
1464 struct snd_soc_dapm_widget_list *list = *list_;
1465 struct snd_soc_dapm_widget *widget;
1466 struct snd_soc_dai *dai;
1467 int prune = 0;
1468
1469 /* Destroy any old FE <--> BE connections */
1470 for_each_dpcm_be(fe, stream, dpcm) {
1471 unsigned int i;
1472
1473 /* is there a valid CPU DAI widget for this BE */
1474 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1475
1476 /* prune the BE if it's no longer in our active list */
1477 if (widget && widget_in_list(list, widget))
1478 continue;
1479
1480 /* is there a valid CODEC DAI widget for this BE */
1481 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1482 widget = dai_get_widget(dai, stream);
1483
1484 /* prune the BE if it's no longer in our active list */
1485 if (widget && widget_in_list(list, widget))
1486 continue;
1487 }
1488
1489 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1490 stream ? "capture" : "playback",
1491 dpcm->be->dai_link->name, fe->dai_link->name);
1492 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1493 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1494 prune++;
1495 }
1496
1497 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1498 return prune;
1499 }
1500
1501 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1502 struct snd_soc_dapm_widget_list **list_)
1503 {
1504 struct snd_soc_card *card = fe->card;
1505 struct snd_soc_dapm_widget_list *list = *list_;
1506 struct snd_soc_pcm_runtime *be;
1507 int i, new = 0, err;
1508
1509 /* Create any new FE <--> BE connections */
1510 for (i = 0; i < list->num_widgets; i++) {
1511
1512 switch (list->widgets[i]->id) {
1513 case snd_soc_dapm_dai_in:
1514 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1515 continue;
1516 break;
1517 case snd_soc_dapm_dai_out:
1518 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1519 continue;
1520 break;
1521 default:
1522 continue;
1523 }
1524
1525 /* is there a valid BE rtd for this widget */
1526 be = dpcm_get_be(card, list->widgets[i], stream);
1527 if (!be) {
1528 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1529 list->widgets[i]->name);
1530 continue;
1531 }
1532
1533 /* make sure BE is a real BE */
1534 if (!be->dai_link->no_pcm)
1535 continue;
1536
1537 /* don't connect if FE is not running */
1538 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1539 continue;
1540
1541 /* newly connected FE and BE */
1542 err = dpcm_be_connect(fe, be, stream);
1543 if (err < 0) {
1544 dev_err(fe->dev, "ASoC: can't connect %s\n",
1545 list->widgets[i]->name);
1546 break;
1547 } else if (err == 0) /* already connected */
1548 continue;
1549
1550 /* new */
1551 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1552 new++;
1553 }
1554
1555 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1556 return new;
1557 }
1558
1559 /*
1560 * Find the corresponding BE DAIs that source or sink audio to this
1561 * FE substream.
1562 */
1563 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1564 int stream, struct snd_soc_dapm_widget_list **list, int new)
1565 {
1566 if (new)
1567 return dpcm_add_paths(fe, stream, list);
1568 else
1569 return dpcm_prune_paths(fe, stream, list);
1570 }
1571
1572 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1573 {
1574 struct snd_soc_dpcm *dpcm;
1575 unsigned long flags;
1576
1577 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1578 for_each_dpcm_be(fe, stream, dpcm)
1579 dpcm->be->dpcm[stream].runtime_update =
1580 SND_SOC_DPCM_UPDATE_NO;
1581 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1582 }
1583
1584 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1585 int stream)
1586 {
1587 struct snd_soc_dpcm *dpcm;
1588
1589 /* disable any enabled and non active backends */
1590 for_each_dpcm_be(fe, stream, dpcm) {
1591
1592 struct snd_soc_pcm_runtime *be = dpcm->be;
1593 struct snd_pcm_substream *be_substream =
1594 snd_soc_dpcm_get_substream(be, stream);
1595
1596 if (be->dpcm[stream].users == 0)
1597 dev_err(be->dev, "ASoC: no users %s at close - state %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_OPEN)
1605 continue;
1606
1607 soc_pcm_close(be_substream);
1608 be_substream->runtime = NULL;
1609 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1610 }
1611 }
1612
1613 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1614 {
1615 struct snd_soc_dpcm *dpcm;
1616 int err, count = 0;
1617
1618 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1619 for_each_dpcm_be(fe, stream, dpcm) {
1620
1621 struct snd_soc_pcm_runtime *be = dpcm->be;
1622 struct snd_pcm_substream *be_substream =
1623 snd_soc_dpcm_get_substream(be, stream);
1624
1625 if (!be_substream) {
1626 dev_err(be->dev, "ASoC: no backend %s stream\n",
1627 stream ? "capture" : "playback");
1628 continue;
1629 }
1630
1631 /* is this op for this BE ? */
1632 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1633 continue;
1634
1635 /* first time the dpcm is open ? */
1636 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1637 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1638 stream ? "capture" : "playback",
1639 be->dpcm[stream].state);
1640
1641 if (be->dpcm[stream].users++ != 0)
1642 continue;
1643
1644 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1645 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1646 continue;
1647
1648 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1649 stream ? "capture" : "playback", be->dai_link->name);
1650
1651 be_substream->runtime = be->dpcm[stream].runtime;
1652 err = soc_pcm_open(be_substream);
1653 if (err < 0) {
1654 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1655 be->dpcm[stream].users--;
1656 if (be->dpcm[stream].users < 0)
1657 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1658 stream ? "capture" : "playback",
1659 be->dpcm[stream].state);
1660
1661 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1662 goto unwind;
1663 }
1664
1665 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1666 count++;
1667 }
1668
1669 return count;
1670
1671 unwind:
1672 /* disable any enabled and non active backends */
1673 for_each_dpcm_be_rollback(fe, stream, dpcm) {
1674 struct snd_soc_pcm_runtime *be = dpcm->be;
1675 struct snd_pcm_substream *be_substream =
1676 snd_soc_dpcm_get_substream(be, stream);
1677
1678 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1679 continue;
1680
1681 if (be->dpcm[stream].users == 0)
1682 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1683 stream ? "capture" : "playback",
1684 be->dpcm[stream].state);
1685
1686 if (--be->dpcm[stream].users != 0)
1687 continue;
1688
1689 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1690 continue;
1691
1692 soc_pcm_close(be_substream);
1693 be_substream->runtime = NULL;
1694 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1695 }
1696
1697 return err;
1698 }
1699
1700 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1701 struct snd_soc_pcm_stream *stream)
1702 {
1703 runtime->hw.rate_min = stream->rate_min;
1704 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1705 runtime->hw.channels_min = stream->channels_min;
1706 runtime->hw.channels_max = stream->channels_max;
1707 if (runtime->hw.formats)
1708 runtime->hw.formats &= stream->formats;
1709 else
1710 runtime->hw.formats = stream->formats;
1711 runtime->hw.rates = stream->rates;
1712 }
1713
1714 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1715 u64 *formats)
1716 {
1717 struct snd_soc_pcm_runtime *fe = substream->private_data;
1718 struct snd_soc_dpcm *dpcm;
1719 struct snd_soc_dai *dai;
1720 int stream = substream->stream;
1721
1722 if (!fe->dai_link->dpcm_merged_format)
1723 return;
1724
1725 /*
1726 * It returns merged BE codec format
1727 * if FE want to use it (= dpcm_merged_format)
1728 */
1729
1730 for_each_dpcm_be(fe, stream, dpcm) {
1731 struct snd_soc_pcm_runtime *be = dpcm->be;
1732 struct snd_soc_dai_driver *codec_dai_drv;
1733 struct snd_soc_pcm_stream *codec_stream;
1734 int i;
1735
1736 for_each_rtd_codec_dai(be, i, dai) {
1737 /*
1738 * Skip CODECs which don't support the current stream
1739 * type. See soc_pcm_init_runtime_hw() for more details
1740 */
1741 if (!snd_soc_dai_stream_valid(dai, stream))
1742 continue;
1743
1744 codec_dai_drv = dai->driver;
1745 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1746 codec_stream = &codec_dai_drv->playback;
1747 else
1748 codec_stream = &codec_dai_drv->capture;
1749
1750 *formats &= codec_stream->formats;
1751 }
1752 }
1753 }
1754
1755 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1756 unsigned int *channels_min,
1757 unsigned int *channels_max)
1758 {
1759 struct snd_soc_pcm_runtime *fe = substream->private_data;
1760 struct snd_soc_dpcm *dpcm;
1761 int stream = substream->stream;
1762
1763 if (!fe->dai_link->dpcm_merged_chan)
1764 return;
1765
1766 /*
1767 * It returns merged BE codec channel;
1768 * if FE want to use it (= dpcm_merged_chan)
1769 */
1770
1771 for_each_dpcm_be(fe, stream, dpcm) {
1772 struct snd_soc_pcm_runtime *be = dpcm->be;
1773 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1774 struct snd_soc_dai_driver *codec_dai_drv;
1775 struct snd_soc_pcm_stream *codec_stream;
1776 struct snd_soc_pcm_stream *cpu_stream;
1777
1778 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1779 cpu_stream = &cpu_dai_drv->playback;
1780 else
1781 cpu_stream = &cpu_dai_drv->capture;
1782
1783 *channels_min = max(*channels_min, cpu_stream->channels_min);
1784 *channels_max = min(*channels_max, cpu_stream->channels_max);
1785
1786 /*
1787 * chan min/max cannot be enforced if there are multiple CODEC
1788 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1789 */
1790 if (be->num_codecs == 1) {
1791 codec_dai_drv = be->codec_dais[0]->driver;
1792
1793 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1794 codec_stream = &codec_dai_drv->playback;
1795 else
1796 codec_stream = &codec_dai_drv->capture;
1797
1798 *channels_min = max(*channels_min,
1799 codec_stream->channels_min);
1800 *channels_max = min(*channels_max,
1801 codec_stream->channels_max);
1802 }
1803 }
1804 }
1805
1806 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1807 unsigned int *rates,
1808 unsigned int *rate_min,
1809 unsigned int *rate_max)
1810 {
1811 struct snd_soc_pcm_runtime *fe = substream->private_data;
1812 struct snd_soc_dpcm *dpcm;
1813 int stream = substream->stream;
1814
1815 if (!fe->dai_link->dpcm_merged_rate)
1816 return;
1817
1818 /*
1819 * It returns merged BE codec channel;
1820 * if FE want to use it (= dpcm_merged_chan)
1821 */
1822
1823 for_each_dpcm_be(fe, stream, dpcm) {
1824 struct snd_soc_pcm_runtime *be = dpcm->be;
1825 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1826 struct snd_soc_dai_driver *codec_dai_drv;
1827 struct snd_soc_pcm_stream *codec_stream;
1828 struct snd_soc_pcm_stream *cpu_stream;
1829 struct snd_soc_dai *dai;
1830 int i;
1831
1832 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1833 cpu_stream = &cpu_dai_drv->playback;
1834 else
1835 cpu_stream = &cpu_dai_drv->capture;
1836
1837 *rate_min = max(*rate_min, cpu_stream->rate_min);
1838 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1839 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1840
1841 for_each_rtd_codec_dai(be, i, dai) {
1842 /*
1843 * Skip CODECs which don't support the current stream
1844 * type. See soc_pcm_init_runtime_hw() for more details
1845 */
1846 if (!snd_soc_dai_stream_valid(dai, stream))
1847 continue;
1848
1849 codec_dai_drv = dai->driver;
1850 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1851 codec_stream = &codec_dai_drv->playback;
1852 else
1853 codec_stream = &codec_dai_drv->capture;
1854
1855 *rate_min = max(*rate_min, codec_stream->rate_min);
1856 *rate_max = min_not_zero(*rate_max,
1857 codec_stream->rate_max);
1858 *rates = snd_pcm_rate_mask_intersect(*rates,
1859 codec_stream->rates);
1860 }
1861 }
1862 }
1863
1864 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1865 {
1866 struct snd_pcm_runtime *runtime = substream->runtime;
1867 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1868 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1869 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1870
1871 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1872 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1873 else
1874 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1875
1876 dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1877 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1878 &runtime->hw.channels_max);
1879 dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1880 &runtime->hw.rate_min, &runtime->hw.rate_max);
1881 }
1882
1883 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1884
1885 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1886 * for avoiding the race with trigger callback.
1887 * If the state is unset and a trigger is pending while the previous operation,
1888 * process the pending trigger action here.
1889 */
1890 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1891 int stream, enum snd_soc_dpcm_update state)
1892 {
1893 struct snd_pcm_substream *substream =
1894 snd_soc_dpcm_get_substream(fe, stream);
1895
1896 snd_pcm_stream_lock_irq(substream);
1897 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1898 dpcm_fe_dai_do_trigger(substream,
1899 fe->dpcm[stream].trigger_pending - 1);
1900 fe->dpcm[stream].trigger_pending = 0;
1901 }
1902 fe->dpcm[stream].runtime_update = state;
1903 snd_pcm_stream_unlock_irq(substream);
1904 }
1905
1906 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1907 int stream)
1908 {
1909 struct snd_soc_dpcm *dpcm;
1910 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1911 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1912 int err;
1913
1914 /* apply symmetry for FE */
1915 if (soc_pcm_has_symmetry(fe_substream))
1916 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1917
1918 /* Symmetry only applies if we've got an active stream. */
1919 if (fe_cpu_dai->active) {
1920 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1921 if (err < 0)
1922 return err;
1923 }
1924
1925 /* apply symmetry for BE */
1926 for_each_dpcm_be(fe, stream, dpcm) {
1927 struct snd_soc_pcm_runtime *be = dpcm->be;
1928 struct snd_pcm_substream *be_substream =
1929 snd_soc_dpcm_get_substream(be, stream);
1930 struct snd_soc_pcm_runtime *rtd;
1931 struct snd_soc_dai *codec_dai;
1932 int i;
1933
1934 /* A backend may not have the requested substream */
1935 if (!be_substream)
1936 continue;
1937
1938 rtd = be_substream->private_data;
1939 if (rtd->dai_link->be_hw_params_fixup)
1940 continue;
1941
1942 if (soc_pcm_has_symmetry(be_substream))
1943 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1944
1945 /* Symmetry only applies if we've got an active stream. */
1946 if (rtd->cpu_dai->active) {
1947 err = soc_pcm_apply_symmetry(fe_substream,
1948 rtd->cpu_dai);
1949 if (err < 0)
1950 return err;
1951 }
1952
1953 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1954 if (codec_dai->active) {
1955 err = soc_pcm_apply_symmetry(fe_substream,
1956 codec_dai);
1957 if (err < 0)
1958 return err;
1959 }
1960 }
1961 }
1962
1963 return 0;
1964 }
1965
1966 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1967 {
1968 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1969 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1970 int stream = fe_substream->stream, ret = 0;
1971
1972 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1973
1974 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1975 if (ret < 0) {
1976 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1977 goto be_err;
1978 }
1979
1980 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1981
1982 /* start the DAI frontend */
1983 ret = soc_pcm_open(fe_substream);
1984 if (ret < 0) {
1985 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1986 goto unwind;
1987 }
1988
1989 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1990
1991 dpcm_set_fe_runtime(fe_substream);
1992 snd_pcm_limit_hw_rates(runtime);
1993
1994 ret = dpcm_apply_symmetry(fe_substream, stream);
1995 if (ret < 0) {
1996 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1997 ret);
1998 goto unwind;
1999 }
2000
2001 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2002 return 0;
2003
2004 unwind:
2005 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
2006 be_err:
2007 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2008 return ret;
2009 }
2010
2011 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2012 {
2013 struct snd_soc_dpcm *dpcm;
2014
2015 /* only shutdown BEs that are either sinks or sources to this FE DAI */
2016 for_each_dpcm_be(fe, stream, dpcm) {
2017
2018 struct snd_soc_pcm_runtime *be = dpcm->be;
2019 struct snd_pcm_substream *be_substream =
2020 snd_soc_dpcm_get_substream(be, stream);
2021
2022 /* is this op for this BE ? */
2023 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2024 continue;
2025
2026 if (be->dpcm[stream].users == 0)
2027 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
2028 stream ? "capture" : "playback",
2029 be->dpcm[stream].state);
2030
2031 if (--be->dpcm[stream].users != 0)
2032 continue;
2033
2034 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2035 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
2036 soc_pcm_hw_free(be_substream);
2037 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2038 }
2039
2040 dev_dbg(be->dev, "ASoC: close BE %s\n",
2041 be->dai_link->name);
2042
2043 soc_pcm_close(be_substream);
2044 be_substream->runtime = NULL;
2045
2046 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2047 }
2048 return 0;
2049 }
2050
2051 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2052 {
2053 struct snd_soc_pcm_runtime *fe = substream->private_data;
2054 int stream = substream->stream;
2055
2056 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2057
2058 /* shutdown the BEs */
2059 dpcm_be_dai_shutdown(fe, substream->stream);
2060
2061 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2062
2063 /* now shutdown the frontend */
2064 soc_pcm_close(substream);
2065
2066 /* run the stream event for each BE */
2067 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2068
2069 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2070 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2071 return 0;
2072 }
2073
2074 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2075 {
2076 struct snd_soc_dpcm *dpcm;
2077
2078 /* only hw_params backends that are either sinks or sources
2079 * to this frontend DAI */
2080 for_each_dpcm_be(fe, stream, dpcm) {
2081
2082 struct snd_soc_pcm_runtime *be = dpcm->be;
2083 struct snd_pcm_substream *be_substream =
2084 snd_soc_dpcm_get_substream(be, stream);
2085
2086 /* is this op for this BE ? */
2087 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2088 continue;
2089
2090 /* only free hw when no longer used - check all FEs */
2091 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2092 continue;
2093
2094 /* do not free hw if this BE is used by other FE */
2095 if (be->dpcm[stream].users > 1)
2096 continue;
2097
2098 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2099 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2100 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2101 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2102 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2103 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2104 continue;
2105
2106 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2107 be->dai_link->name);
2108
2109 soc_pcm_hw_free(be_substream);
2110
2111 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2112 }
2113
2114 return 0;
2115 }
2116
2117 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2118 {
2119 struct snd_soc_pcm_runtime *fe = substream->private_data;
2120 int err, stream = substream->stream;
2121
2122 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2123 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2124
2125 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2126
2127 /* call hw_free on the frontend */
2128 err = soc_pcm_hw_free(substream);
2129 if (err < 0)
2130 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2131 fe->dai_link->name);
2132
2133 /* only hw_params backends that are either sinks or sources
2134 * to this frontend DAI */
2135 err = dpcm_be_dai_hw_free(fe, stream);
2136
2137 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2138 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2139
2140 mutex_unlock(&fe->card->mutex);
2141 return 0;
2142 }
2143
2144 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2145 {
2146 struct snd_soc_dpcm *dpcm;
2147 int ret;
2148
2149 for_each_dpcm_be(fe, stream, dpcm) {
2150
2151 struct snd_soc_pcm_runtime *be = dpcm->be;
2152 struct snd_pcm_substream *be_substream =
2153 snd_soc_dpcm_get_substream(be, stream);
2154
2155 /* is this op for this BE ? */
2156 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2157 continue;
2158
2159 /* copy params for each dpcm */
2160 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2161 sizeof(struct snd_pcm_hw_params));
2162
2163 /* perform any hw_params fixups */
2164 if (be->dai_link->be_hw_params_fixup) {
2165 ret = be->dai_link->be_hw_params_fixup(be,
2166 &dpcm->hw_params);
2167 if (ret < 0) {
2168 dev_err(be->dev,
2169 "ASoC: hw_params BE fixup failed %d\n",
2170 ret);
2171 goto unwind;
2172 }
2173 }
2174
2175 /* copy the fixed-up hw params for BE dai */
2176 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2177 sizeof(struct snd_pcm_hw_params));
2178
2179 /* only allow hw_params() if no connected FEs are running */
2180 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2181 continue;
2182
2183 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2184 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2185 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2186 continue;
2187
2188 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2189 be->dai_link->name);
2190
2191 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2192 if (ret < 0) {
2193 dev_err(dpcm->be->dev,
2194 "ASoC: hw_params BE failed %d\n", ret);
2195 goto unwind;
2196 }
2197
2198 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2199 }
2200 return 0;
2201
2202 unwind:
2203 /* disable any enabled and non active backends */
2204 for_each_dpcm_be_rollback(fe, stream, dpcm) {
2205 struct snd_soc_pcm_runtime *be = dpcm->be;
2206 struct snd_pcm_substream *be_substream =
2207 snd_soc_dpcm_get_substream(be, stream);
2208
2209 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2210 continue;
2211
2212 /* only allow hw_free() if no connected FEs are running */
2213 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2214 continue;
2215
2216 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2217 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2218 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2219 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2220 continue;
2221
2222 soc_pcm_hw_free(be_substream);
2223 }
2224
2225 return ret;
2226 }
2227
2228 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2229 struct snd_pcm_hw_params *params)
2230 {
2231 struct snd_soc_pcm_runtime *fe = substream->private_data;
2232 int ret, stream = substream->stream;
2233
2234 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2235 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2236
2237 memcpy(&fe->dpcm[substream->stream].hw_params, params,
2238 sizeof(struct snd_pcm_hw_params));
2239 ret = dpcm_be_dai_hw_params(fe, substream->stream);
2240 if (ret < 0) {
2241 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2242 goto out;
2243 }
2244
2245 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2246 fe->dai_link->name, params_rate(params),
2247 params_channels(params), params_format(params));
2248
2249 /* call hw_params on the frontend */
2250 ret = soc_pcm_hw_params(substream, params);
2251 if (ret < 0) {
2252 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2253 dpcm_be_dai_hw_free(fe, stream);
2254 } else
2255 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2256
2257 out:
2258 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2259 mutex_unlock(&fe->card->mutex);
2260 return ret;
2261 }
2262
2263 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2264 struct snd_pcm_substream *substream, int cmd)
2265 {
2266 int ret;
2267
2268 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2269 dpcm->be->dai_link->name, cmd);
2270
2271 ret = soc_pcm_trigger(substream, cmd);
2272 if (ret < 0)
2273 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2274
2275 return ret;
2276 }
2277
2278 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2279 int cmd)
2280 {
2281 struct snd_soc_dpcm *dpcm;
2282 int ret = 0;
2283
2284 for_each_dpcm_be(fe, stream, dpcm) {
2285
2286 struct snd_soc_pcm_runtime *be = dpcm->be;
2287 struct snd_pcm_substream *be_substream =
2288 snd_soc_dpcm_get_substream(be, stream);
2289
2290 /* is this op for this BE ? */
2291 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2292 continue;
2293
2294 switch (cmd) {
2295 case SNDRV_PCM_TRIGGER_START:
2296 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2297 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2298 continue;
2299
2300 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2301 if (ret)
2302 return ret;
2303
2304 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2305 break;
2306 case SNDRV_PCM_TRIGGER_RESUME:
2307 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2308 continue;
2309
2310 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2311 if (ret)
2312 return ret;
2313
2314 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2315 break;
2316 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2317 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2318 continue;
2319
2320 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2321 if (ret)
2322 return ret;
2323
2324 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2325 break;
2326 case SNDRV_PCM_TRIGGER_STOP:
2327 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2328 continue;
2329
2330 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2331 continue;
2332
2333 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2334 if (ret)
2335 return ret;
2336
2337 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2338 break;
2339 case SNDRV_PCM_TRIGGER_SUSPEND:
2340 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2341 continue;
2342
2343 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2344 continue;
2345
2346 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2347 if (ret)
2348 return ret;
2349
2350 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2351 break;
2352 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2353 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2354 continue;
2355
2356 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2357 continue;
2358
2359 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2360 if (ret)
2361 return ret;
2362
2363 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2364 break;
2365 }
2366 }
2367
2368 return ret;
2369 }
2370 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2371
2372 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2373 {
2374 struct snd_soc_pcm_runtime *fe = substream->private_data;
2375 int stream = substream->stream, ret;
2376 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2377
2378 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2379
2380 switch (trigger) {
2381 case SND_SOC_DPCM_TRIGGER_PRE:
2382 /* call trigger on the frontend before the backend. */
2383
2384 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2385 fe->dai_link->name, cmd);
2386
2387 ret = soc_pcm_trigger(substream, cmd);
2388 if (ret < 0) {
2389 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2390 goto out;
2391 }
2392
2393 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2394 break;
2395 case SND_SOC_DPCM_TRIGGER_POST:
2396 /* call trigger on the frontend after the backend. */
2397
2398 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2399 if (ret < 0) {
2400 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2401 goto out;
2402 }
2403
2404 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2405 fe->dai_link->name, cmd);
2406
2407 ret = soc_pcm_trigger(substream, cmd);
2408 break;
2409 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2410 /* bespoke trigger() - handles both FE and BEs */
2411
2412 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2413 fe->dai_link->name, cmd);
2414
2415 ret = soc_pcm_bespoke_trigger(substream, cmd);
2416 if (ret < 0) {
2417 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2418 goto out;
2419 }
2420 break;
2421 default:
2422 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2423 fe->dai_link->name);
2424 ret = -EINVAL;
2425 goto out;
2426 }
2427
2428 switch (cmd) {
2429 case SNDRV_PCM_TRIGGER_START:
2430 case SNDRV_PCM_TRIGGER_RESUME:
2431 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2432 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2433 break;
2434 case SNDRV_PCM_TRIGGER_STOP:
2435 case SNDRV_PCM_TRIGGER_SUSPEND:
2436 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2437 break;
2438 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2439 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2440 break;
2441 }
2442
2443 out:
2444 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2445 return ret;
2446 }
2447
2448 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2449 {
2450 struct snd_soc_pcm_runtime *fe = substream->private_data;
2451 int stream = substream->stream;
2452
2453 /* if FE's runtime_update is already set, we're in race;
2454 * process this trigger later at exit
2455 */
2456 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2457 fe->dpcm[stream].trigger_pending = cmd + 1;
2458 return 0; /* delayed, assuming it's successful */
2459 }
2460
2461 /* we're alone, let's trigger */
2462 return dpcm_fe_dai_do_trigger(substream, cmd);
2463 }
2464
2465 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2466 {
2467 struct snd_soc_dpcm *dpcm;
2468 int ret = 0;
2469
2470 for_each_dpcm_be(fe, stream, dpcm) {
2471
2472 struct snd_soc_pcm_runtime *be = dpcm->be;
2473 struct snd_pcm_substream *be_substream =
2474 snd_soc_dpcm_get_substream(be, stream);
2475
2476 /* is this op for this BE ? */
2477 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2478 continue;
2479
2480 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2481 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2482 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2483 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2484 continue;
2485
2486 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2487 be->dai_link->name);
2488
2489 ret = soc_pcm_prepare(be_substream);
2490 if (ret < 0) {
2491 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2492 ret);
2493 break;
2494 }
2495
2496 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2497 }
2498 return ret;
2499 }
2500
2501 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2502 {
2503 struct snd_soc_pcm_runtime *fe = substream->private_data;
2504 int stream = substream->stream, ret = 0;
2505
2506 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2507
2508 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2509
2510 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2511
2512 /* there is no point preparing this FE if there are no BEs */
2513 if (list_empty(&fe->dpcm[stream].be_clients)) {
2514 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2515 fe->dai_link->name);
2516 ret = -EINVAL;
2517 goto out;
2518 }
2519
2520 ret = dpcm_be_dai_prepare(fe, substream->stream);
2521 if (ret < 0)
2522 goto out;
2523
2524 /* call prepare on the frontend */
2525 ret = soc_pcm_prepare(substream);
2526 if (ret < 0) {
2527 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2528 fe->dai_link->name);
2529 goto out;
2530 }
2531
2532 /* run the stream event for each BE */
2533 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2534 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2535
2536 out:
2537 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2538 mutex_unlock(&fe->card->mutex);
2539
2540 return ret;
2541 }
2542
2543 static int soc_pcm_ioctl(struct snd_pcm_substream *substream,
2544 unsigned int cmd, void *arg)
2545 {
2546 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2547 struct snd_soc_component *component;
2548 struct snd_soc_rtdcom_list *rtdcom;
2549
2550 for_each_rtdcom(rtd, rtdcom) {
2551 component = rtdcom->component;
2552
2553 if (!component->driver->ops ||
2554 !component->driver->ops->ioctl)
2555 continue;
2556
2557 /* FIXME: use 1st ioctl */
2558 return component->driver->ops->ioctl(substream, cmd, arg);
2559 }
2560
2561 return snd_pcm_lib_ioctl(substream, cmd, arg);
2562 }
2563
2564 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2565 {
2566 struct snd_pcm_substream *substream =
2567 snd_soc_dpcm_get_substream(fe, stream);
2568 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2569 int err;
2570
2571 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2572 stream ? "capture" : "playback", fe->dai_link->name);
2573
2574 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2575 /* call bespoke trigger - FE takes care of all BE triggers */
2576 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2577 fe->dai_link->name);
2578
2579 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2580 if (err < 0)
2581 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2582 } else {
2583 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2584 fe->dai_link->name);
2585
2586 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2587 if (err < 0)
2588 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2589 }
2590
2591 err = dpcm_be_dai_hw_free(fe, stream);
2592 if (err < 0)
2593 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2594
2595 err = dpcm_be_dai_shutdown(fe, stream);
2596 if (err < 0)
2597 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2598
2599 /* run the stream event for each BE */
2600 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2601
2602 return 0;
2603 }
2604
2605 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2606 {
2607 struct snd_pcm_substream *substream =
2608 snd_soc_dpcm_get_substream(fe, stream);
2609 struct snd_soc_dpcm *dpcm;
2610 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2611 int ret;
2612 unsigned long flags;
2613
2614 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2615 stream ? "capture" : "playback", fe->dai_link->name);
2616
2617 /* Only start the BE if the FE is ready */
2618 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2619 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2620 return -EINVAL;
2621
2622 /* startup must always be called for new BEs */
2623 ret = dpcm_be_dai_startup(fe, stream);
2624 if (ret < 0)
2625 goto disconnect;
2626
2627 /* keep going if FE state is > open */
2628 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2629 return 0;
2630
2631 ret = dpcm_be_dai_hw_params(fe, stream);
2632 if (ret < 0)
2633 goto close;
2634
2635 /* keep going if FE state is > hw_params */
2636 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2637 return 0;
2638
2639
2640 ret = dpcm_be_dai_prepare(fe, stream);
2641 if (ret < 0)
2642 goto hw_free;
2643
2644 /* run the stream event for each BE */
2645 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2646
2647 /* keep going if FE state is > prepare */
2648 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2649 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2650 return 0;
2651
2652 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2653 /* call trigger on the frontend - FE takes care of all BE triggers */
2654 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2655 fe->dai_link->name);
2656
2657 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2658 if (ret < 0) {
2659 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2660 goto hw_free;
2661 }
2662 } else {
2663 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2664 fe->dai_link->name);
2665
2666 ret = dpcm_be_dai_trigger(fe, stream,
2667 SNDRV_PCM_TRIGGER_START);
2668 if (ret < 0) {
2669 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2670 goto hw_free;
2671 }
2672 }
2673
2674 return 0;
2675
2676 hw_free:
2677 dpcm_be_dai_hw_free(fe, stream);
2678 close:
2679 dpcm_be_dai_shutdown(fe, stream);
2680 disconnect:
2681 /* disconnect any non started BEs */
2682 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2683 for_each_dpcm_be(fe, stream, dpcm) {
2684 struct snd_soc_pcm_runtime *be = dpcm->be;
2685 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2686 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2687 }
2688 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2689
2690 return ret;
2691 }
2692
2693 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2694 {
2695 int ret;
2696
2697 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2698 ret = dpcm_run_update_startup(fe, stream);
2699 if (ret < 0)
2700 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2701 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2702
2703 return ret;
2704 }
2705
2706 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2707 {
2708 int ret;
2709
2710 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2711 ret = dpcm_run_update_shutdown(fe, stream);
2712 if (ret < 0)
2713 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2714 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2715
2716 return ret;
2717 }
2718
2719 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2720 {
2721 struct snd_soc_dapm_widget_list *list;
2722 int count, paths;
2723
2724 if (!fe->dai_link->dynamic)
2725 return 0;
2726
2727 /* only check active links */
2728 if (!fe->cpu_dai->active)
2729 return 0;
2730
2731 /* DAPM sync will call this to update DSP paths */
2732 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2733 new ? "new" : "old", fe->dai_link->name);
2734
2735 /* skip if FE doesn't have playback capability */
2736 if (!fe->cpu_dai->driver->playback.channels_min ||
2737 !fe->codec_dai->driver->playback.channels_min)
2738 goto capture;
2739
2740 /* skip if FE isn't currently playing */
2741 if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2742 goto capture;
2743
2744 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2745 if (paths < 0) {
2746 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2747 fe->dai_link->name, "playback");
2748 return paths;
2749 }
2750
2751 /* update any playback paths */
2752 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2753 if (count) {
2754 if (new)
2755 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2756 else
2757 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2758
2759 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2760 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2761 }
2762
2763 dpcm_path_put(&list);
2764
2765 capture:
2766 /* skip if FE doesn't have capture capability */
2767 if (!fe->cpu_dai->driver->capture.channels_min ||
2768 !fe->codec_dai->driver->capture.channels_min)
2769 return 0;
2770
2771 /* skip if FE isn't currently capturing */
2772 if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2773 return 0;
2774
2775 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2776 if (paths < 0) {
2777 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2778 fe->dai_link->name, "capture");
2779 return paths;
2780 }
2781
2782 /* update any old capture paths */
2783 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2784 if (count) {
2785 if (new)
2786 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2787 else
2788 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2789
2790 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2791 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2792 }
2793
2794 dpcm_path_put(&list);
2795
2796 return 0;
2797 }
2798
2799 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2800 * any DAI links.
2801 */
2802 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2803 {
2804 struct snd_soc_pcm_runtime *fe;
2805 int ret = 0;
2806
2807 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2808 /* shutdown all old paths first */
2809 for_each_card_rtds(card, fe) {
2810 ret = soc_dpcm_fe_runtime_update(fe, 0);
2811 if (ret)
2812 goto out;
2813 }
2814
2815 /* bring new paths up */
2816 for_each_card_rtds(card, fe) {
2817 ret = soc_dpcm_fe_runtime_update(fe, 1);
2818 if (ret)
2819 goto out;
2820 }
2821
2822 out:
2823 mutex_unlock(&card->mutex);
2824 return ret;
2825 }
2826 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2827 {
2828 struct snd_soc_dpcm *dpcm;
2829 struct snd_soc_dai *dai;
2830
2831 for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2832
2833 struct snd_soc_pcm_runtime *be = dpcm->be;
2834 int i;
2835
2836 if (be->dai_link->ignore_suspend)
2837 continue;
2838
2839 for_each_rtd_codec_dai(be, i, dai) {
2840 struct snd_soc_dai_driver *drv = dai->driver;
2841
2842 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2843 be->dai_link->name);
2844
2845 if (drv->ops && drv->ops->digital_mute &&
2846 dai->playback_active)
2847 drv->ops->digital_mute(dai, mute);
2848 }
2849 }
2850
2851 return 0;
2852 }
2853
2854 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2855 {
2856 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2857 struct snd_soc_dpcm *dpcm;
2858 struct snd_soc_dapm_widget_list *list;
2859 int ret;
2860 int stream = fe_substream->stream;
2861
2862 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2863 fe->dpcm[stream].runtime = fe_substream->runtime;
2864
2865 ret = dpcm_path_get(fe, stream, &list);
2866 if (ret < 0) {
2867 mutex_unlock(&fe->card->mutex);
2868 return ret;
2869 } else if (ret == 0) {
2870 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2871 fe->dai_link->name, stream ? "capture" : "playback");
2872 }
2873
2874 /* calculate valid and active FE <-> BE dpcms */
2875 dpcm_process_paths(fe, stream, &list, 1);
2876
2877 ret = dpcm_fe_dai_startup(fe_substream);
2878 if (ret < 0) {
2879 /* clean up all links */
2880 for_each_dpcm_be(fe, stream, dpcm)
2881 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2882
2883 dpcm_be_disconnect(fe, stream);
2884 fe->dpcm[stream].runtime = NULL;
2885 }
2886
2887 dpcm_clear_pending_state(fe, stream);
2888 dpcm_path_put(&list);
2889 mutex_unlock(&fe->card->mutex);
2890 return ret;
2891 }
2892
2893 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2894 {
2895 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2896 struct snd_soc_dpcm *dpcm;
2897 int stream = fe_substream->stream, ret;
2898
2899 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2900 ret = dpcm_fe_dai_shutdown(fe_substream);
2901
2902 /* mark FE's links ready to prune */
2903 for_each_dpcm_be(fe, stream, dpcm)
2904 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2905
2906 dpcm_be_disconnect(fe, stream);
2907
2908 fe->dpcm[stream].runtime = NULL;
2909 mutex_unlock(&fe->card->mutex);
2910 return ret;
2911 }
2912
2913 static void soc_pcm_private_free(struct snd_pcm *pcm)
2914 {
2915 struct snd_soc_pcm_runtime *rtd = pcm->private_data;
2916 struct snd_soc_rtdcom_list *rtdcom;
2917 struct snd_soc_component *component;
2918
2919 /* need to sync the delayed work before releasing resources */
2920 flush_delayed_work(&rtd->delayed_work);
2921 for_each_rtdcom(rtd, rtdcom) {
2922 component = rtdcom->component;
2923
2924 if (component->driver->pcm_free)
2925 component->driver->pcm_free(pcm);
2926 }
2927 }
2928
2929 static int soc_rtdcom_ack(struct snd_pcm_substream *substream)
2930 {
2931 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2932 struct snd_soc_rtdcom_list *rtdcom;
2933 struct snd_soc_component *component;
2934
2935 for_each_rtdcom(rtd, rtdcom) {
2936 component = rtdcom->component;
2937
2938 if (!component->driver->ops ||
2939 !component->driver->ops->ack)
2940 continue;
2941
2942 /* FIXME. it returns 1st ask now */
2943 return component->driver->ops->ack(substream);
2944 }
2945
2946 return -EINVAL;
2947 }
2948
2949 static int soc_rtdcom_copy_user(struct snd_pcm_substream *substream, int channel,
2950 unsigned long pos, void __user *buf,
2951 unsigned long bytes)
2952 {
2953 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2954 struct snd_soc_rtdcom_list *rtdcom;
2955 struct snd_soc_component *component;
2956
2957 for_each_rtdcom(rtd, rtdcom) {
2958 component = rtdcom->component;
2959
2960 if (!component->driver->ops ||
2961 !component->driver->ops->copy_user)
2962 continue;
2963
2964 /* FIXME. it returns 1st copy now */
2965 return component->driver->ops->copy_user(substream, channel,
2966 pos, buf, bytes);
2967 }
2968
2969 return -EINVAL;
2970 }
2971
2972 static int soc_rtdcom_copy_kernel(struct snd_pcm_substream *substream, int channel,
2973 unsigned long pos, void *buf, unsigned long bytes)
2974 {
2975 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2976 struct snd_soc_rtdcom_list *rtdcom;
2977 struct snd_soc_component *component;
2978
2979 for_each_rtdcom(rtd, rtdcom) {
2980 component = rtdcom->component;
2981
2982 if (!component->driver->ops ||
2983 !component->driver->ops->copy_kernel)
2984 continue;
2985
2986 /* FIXME. it returns 1st copy now */
2987 return component->driver->ops->copy_kernel(substream, channel,
2988 pos, buf, bytes);
2989 }
2990
2991 return -EINVAL;
2992 }
2993
2994 static int soc_rtdcom_fill_silence(struct snd_pcm_substream *substream, int channel,
2995 unsigned long pos, unsigned long bytes)
2996 {
2997 struct snd_soc_pcm_runtime *rtd = substream->private_data;
2998 struct snd_soc_rtdcom_list *rtdcom;
2999 struct snd_soc_component *component;
3000
3001 for_each_rtdcom(rtd, rtdcom) {
3002 component = rtdcom->component;
3003
3004 if (!component->driver->ops ||
3005 !component->driver->ops->fill_silence)
3006 continue;
3007
3008 /* FIXME. it returns 1st silence now */
3009 return component->driver->ops->fill_silence(substream, channel,
3010 pos, bytes);
3011 }
3012
3013 return -EINVAL;
3014 }
3015
3016 static struct page *soc_rtdcom_page(struct snd_pcm_substream *substream,
3017 unsigned long offset)
3018 {
3019 struct snd_soc_pcm_runtime *rtd = substream->private_data;
3020 struct snd_soc_rtdcom_list *rtdcom;
3021 struct snd_soc_component *component;
3022 struct page *page;
3023
3024 for_each_rtdcom(rtd, rtdcom) {
3025 component = rtdcom->component;
3026
3027 if (!component->driver->ops ||
3028 !component->driver->ops->page)
3029 continue;
3030
3031 /* FIXME. it returns 1st page now */
3032 page = component->driver->ops->page(substream, offset);
3033 if (page)
3034 return page;
3035 }
3036
3037 return NULL;
3038 }
3039
3040 static int soc_rtdcom_mmap(struct snd_pcm_substream *substream,
3041 struct vm_area_struct *vma)
3042 {
3043 struct snd_soc_pcm_runtime *rtd = substream->private_data;
3044 struct snd_soc_rtdcom_list *rtdcom;
3045 struct snd_soc_component *component;
3046
3047 for_each_rtdcom(rtd, rtdcom) {
3048 component = rtdcom->component;
3049
3050 if (!component->driver->ops ||
3051 !component->driver->ops->mmap)
3052 continue;
3053
3054 /* FIXME. it returns 1st mmap now */
3055 return component->driver->ops->mmap(substream, vma);
3056 }
3057
3058 return -EINVAL;
3059 }
3060
3061 /* create a new pcm */
3062 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
3063 {
3064 struct snd_soc_dai *codec_dai;
3065 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3066 struct snd_soc_component *component;
3067 struct snd_soc_rtdcom_list *rtdcom;
3068 struct snd_pcm *pcm;
3069 char new_name[64];
3070 int ret = 0, playback = 0, capture = 0;
3071 int i;
3072
3073 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
3074 playback = rtd->dai_link->dpcm_playback;
3075 capture = rtd->dai_link->dpcm_capture;
3076 } else {
3077 for_each_rtd_codec_dai(rtd, i, codec_dai) {
3078 if (codec_dai->driver->playback.channels_min)
3079 playback = 1;
3080 if (codec_dai->driver->capture.channels_min)
3081 capture = 1;
3082 }
3083
3084 capture = capture && cpu_dai->driver->capture.channels_min;
3085 playback = playback && cpu_dai->driver->playback.channels_min;
3086 }
3087
3088 if (rtd->dai_link->playback_only) {
3089 playback = 1;
3090 capture = 0;
3091 }
3092
3093 if (rtd->dai_link->capture_only) {
3094 playback = 0;
3095 capture = 1;
3096 }
3097
3098 /* create the PCM */
3099 if (rtd->dai_link->no_pcm) {
3100 snprintf(new_name, sizeof(new_name), "(%s)",
3101 rtd->dai_link->stream_name);
3102
3103 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
3104 playback, capture, &pcm);
3105 } else {
3106 if (rtd->dai_link->dynamic)
3107 snprintf(new_name, sizeof(new_name), "%s (*)",
3108 rtd->dai_link->stream_name);
3109 else
3110 snprintf(new_name, sizeof(new_name), "%s %s-%d",
3111 rtd->dai_link->stream_name,
3112 (rtd->num_codecs > 1) ?
3113 "multicodec" : rtd->codec_dai->name, num);
3114
3115 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
3116 capture, &pcm);
3117 }
3118 if (ret < 0) {
3119 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
3120 rtd->dai_link->name);
3121 return ret;
3122 }
3123 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
3124
3125 /* DAPM dai link stream work */
3126 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
3127
3128 pcm->nonatomic = rtd->dai_link->nonatomic;
3129 rtd->pcm = pcm;
3130 pcm->private_data = rtd;
3131
3132 if (rtd->dai_link->no_pcm) {
3133 if (playback)
3134 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
3135 if (capture)
3136 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
3137 goto out;
3138 }
3139
3140 /* ASoC PCM operations */
3141 if (rtd->dai_link->dynamic) {
3142 rtd->ops.open = dpcm_fe_dai_open;
3143 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
3144 rtd->ops.prepare = dpcm_fe_dai_prepare;
3145 rtd->ops.trigger = dpcm_fe_dai_trigger;
3146 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
3147 rtd->ops.close = dpcm_fe_dai_close;
3148 rtd->ops.pointer = soc_pcm_pointer;
3149 rtd->ops.ioctl = soc_pcm_ioctl;
3150 } else {
3151 rtd->ops.open = soc_pcm_open;
3152 rtd->ops.hw_params = soc_pcm_hw_params;
3153 rtd->ops.prepare = soc_pcm_prepare;
3154 rtd->ops.trigger = soc_pcm_trigger;
3155 rtd->ops.hw_free = soc_pcm_hw_free;
3156 rtd->ops.close = soc_pcm_close;
3157 rtd->ops.pointer = soc_pcm_pointer;
3158 rtd->ops.ioctl = soc_pcm_ioctl;
3159 }
3160
3161 for_each_rtdcom(rtd, rtdcom) {
3162 const struct snd_pcm_ops *ops = rtdcom->component->driver->ops;
3163
3164 if (!ops)
3165 continue;
3166
3167 if (ops->ack)
3168 rtd->ops.ack = soc_rtdcom_ack;
3169 if (ops->copy_user)
3170 rtd->ops.copy_user = soc_rtdcom_copy_user;
3171 if (ops->copy_kernel)
3172 rtd->ops.copy_kernel = soc_rtdcom_copy_kernel;
3173 if (ops->fill_silence)
3174 rtd->ops.fill_silence = soc_rtdcom_fill_silence;
3175 if (ops->page)
3176 rtd->ops.page = soc_rtdcom_page;
3177 if (ops->mmap)
3178 rtd->ops.mmap = soc_rtdcom_mmap;
3179 }
3180
3181 if (playback)
3182 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3183
3184 if (capture)
3185 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3186
3187 for_each_rtdcom(rtd, rtdcom) {
3188 component = rtdcom->component;
3189
3190 if (!component->driver->pcm_new)
3191 continue;
3192
3193 ret = component->driver->pcm_new(rtd);
3194 if (ret < 0) {
3195 dev_err(component->dev,
3196 "ASoC: pcm constructor failed: %d\n",
3197 ret);
3198 return ret;
3199 }
3200 }
3201
3202 pcm->private_free = soc_pcm_private_free;
3203 pcm->no_device_suspend = true;
3204 out:
3205 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3206 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3207 cpu_dai->name);
3208 return ret;
3209 }
3210
3211 /* is the current PCM operation for this FE ? */
3212 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3213 {
3214 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3215 return 1;
3216 return 0;
3217 }
3218 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3219
3220 /* is the current PCM operation for this BE ? */
3221 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3222 struct snd_soc_pcm_runtime *be, int stream)
3223 {
3224 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3225 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3226 be->dpcm[stream].runtime_update))
3227 return 1;
3228 return 0;
3229 }
3230 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3231
3232 /* get the substream for this BE */
3233 struct snd_pcm_substream *
3234 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3235 {
3236 return be->pcm->streams[stream].substream;
3237 }
3238 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3239
3240 /* get the BE runtime state */
3241 enum snd_soc_dpcm_state
3242 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3243 {
3244 return be->dpcm[stream].state;
3245 }
3246 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3247
3248 /* set the BE runtime state */
3249 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3250 int stream, enum snd_soc_dpcm_state state)
3251 {
3252 be->dpcm[stream].state = state;
3253 }
3254 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3255
3256 /*
3257 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3258 * are not running, paused or suspended for the specified stream direction.
3259 */
3260 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3261 struct snd_soc_pcm_runtime *be, int stream)
3262 {
3263 struct snd_soc_dpcm *dpcm;
3264 int state;
3265 int ret = 1;
3266 unsigned long flags;
3267
3268 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3269 for_each_dpcm_fe(be, stream, dpcm) {
3270
3271 if (dpcm->fe == fe)
3272 continue;
3273
3274 state = dpcm->fe->dpcm[stream].state;
3275 if (state == SND_SOC_DPCM_STATE_START ||
3276 state == SND_SOC_DPCM_STATE_PAUSED ||
3277 state == SND_SOC_DPCM_STATE_SUSPEND) {
3278 ret = 0;
3279 break;
3280 }
3281 }
3282 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3283
3284 /* it's safe to free/stop this BE DAI */
3285 return ret;
3286 }
3287 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3288
3289 /*
3290 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3291 * running, paused or suspended for the specified stream direction.
3292 */
3293 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3294 struct snd_soc_pcm_runtime *be, int stream)
3295 {
3296 struct snd_soc_dpcm *dpcm;
3297 int state;
3298 int ret = 1;
3299 unsigned long flags;
3300
3301 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3302 for_each_dpcm_fe(be, stream, dpcm) {
3303
3304 if (dpcm->fe == fe)
3305 continue;
3306
3307 state = dpcm->fe->dpcm[stream].state;
3308 if (state == SND_SOC_DPCM_STATE_START ||
3309 state == SND_SOC_DPCM_STATE_PAUSED ||
3310 state == SND_SOC_DPCM_STATE_SUSPEND ||
3311 state == SND_SOC_DPCM_STATE_PREPARE) {
3312 ret = 0;
3313 break;
3314 }
3315 }
3316 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3317
3318 /* it's safe to change hw_params */
3319 return ret;
3320 }
3321 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3322
3323 #ifdef CONFIG_DEBUG_FS
3324 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3325 {
3326 switch (state) {
3327 case SND_SOC_DPCM_STATE_NEW:
3328 return "new";
3329 case SND_SOC_DPCM_STATE_OPEN:
3330 return "open";
3331 case SND_SOC_DPCM_STATE_HW_PARAMS:
3332 return "hw_params";
3333 case SND_SOC_DPCM_STATE_PREPARE:
3334 return "prepare";
3335 case SND_SOC_DPCM_STATE_START:
3336 return "start";
3337 case SND_SOC_DPCM_STATE_STOP:
3338 return "stop";
3339 case SND_SOC_DPCM_STATE_SUSPEND:
3340 return "suspend";
3341 case SND_SOC_DPCM_STATE_PAUSED:
3342 return "paused";
3343 case SND_SOC_DPCM_STATE_HW_FREE:
3344 return "hw_free";
3345 case SND_SOC_DPCM_STATE_CLOSE:
3346 return "close";
3347 }
3348
3349 return "unknown";
3350 }
3351
3352 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3353 int stream, char *buf, size_t size)
3354 {
3355 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3356 struct snd_soc_dpcm *dpcm;
3357 ssize_t offset = 0;
3358 unsigned long flags;
3359
3360 /* FE state */
3361 offset += snprintf(buf + offset, size - offset,
3362 "[%s - %s]\n", fe->dai_link->name,
3363 stream ? "Capture" : "Playback");
3364
3365 offset += snprintf(buf + offset, size - offset, "State: %s\n",
3366 dpcm_state_string(fe->dpcm[stream].state));
3367
3368 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3369 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3370 offset += snprintf(buf + offset, size - offset,
3371 "Hardware Params: "
3372 "Format = %s, Channels = %d, Rate = %d\n",
3373 snd_pcm_format_name(params_format(params)),
3374 params_channels(params),
3375 params_rate(params));
3376
3377 /* BEs state */
3378 offset += snprintf(buf + offset, size - offset, "Backends:\n");
3379
3380 if (list_empty(&fe->dpcm[stream].be_clients)) {
3381 offset += snprintf(buf + offset, size - offset,
3382 " No active DSP links\n");
3383 goto out;
3384 }
3385
3386 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3387 for_each_dpcm_be(fe, stream, dpcm) {
3388 struct snd_soc_pcm_runtime *be = dpcm->be;
3389 params = &dpcm->hw_params;
3390
3391 offset += snprintf(buf + offset, size - offset,
3392 "- %s\n", be->dai_link->name);
3393
3394 offset += snprintf(buf + offset, size - offset,
3395 " State: %s\n",
3396 dpcm_state_string(be->dpcm[stream].state));
3397
3398 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3399 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3400 offset += snprintf(buf + offset, size - offset,
3401 " Hardware Params: "
3402 "Format = %s, Channels = %d, Rate = %d\n",
3403 snd_pcm_format_name(params_format(params)),
3404 params_channels(params),
3405 params_rate(params));
3406 }
3407 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3408 out:
3409 return offset;
3410 }
3411
3412 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3413 size_t count, loff_t *ppos)
3414 {
3415 struct snd_soc_pcm_runtime *fe = file->private_data;
3416 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3417 char *buf;
3418
3419 buf = kmalloc(out_count, GFP_KERNEL);
3420 if (!buf)
3421 return -ENOMEM;
3422
3423 if (fe->cpu_dai->driver->playback.channels_min)
3424 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3425 buf + offset, out_count - offset);
3426
3427 if (fe->cpu_dai->driver->capture.channels_min)
3428 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3429 buf + offset, out_count - offset);
3430
3431 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3432
3433 kfree(buf);
3434 return ret;
3435 }
3436
3437 static const struct file_operations dpcm_state_fops = {
3438 .open = simple_open,
3439 .read = dpcm_state_read_file,
3440 .llseek = default_llseek,
3441 };
3442
3443 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3444 {
3445 if (!rtd->dai_link)
3446 return;
3447
3448 if (!rtd->card->debugfs_card_root)
3449 return;
3450
3451 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3452 rtd->card->debugfs_card_root);
3453 if (!rtd->debugfs_dpcm_root) {
3454 dev_dbg(rtd->dev,
3455 "ASoC: Failed to create dpcm debugfs directory %s\n",
3456 rtd->dai_link->name);
3457 return;
3458 }
3459
3460 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3461 rtd, &dpcm_state_fops);
3462 }
3463 #endif
Linux with added FPC-III support