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ARM: dts: omap5: Add bus_dma_limit for L3 bus
[linux/fpc-iii.git] / sound / soc / soc-pcm.c
blob8de29f48442f6d34d783340e738419db4114e9ee
1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // soc-pcm.c -- ALSA SoC PCM
4 //
5 // Copyright 2005 Wolfson Microelectronics PLC.
6 // Copyright 2005 Openedhand Ltd.
7 // Copyright (C) 2010 Slimlogic Ltd.
8 // Copyright (C) 2010 Texas Instruments Inc.
9 //
10 // Authors: Liam Girdwood <lrg@ti.com>
11 // Mark Brown <broonie@opensource.wolfsonmicro.com>
12
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/delay.h>
16 #include <linux/pinctrl/consumer.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/slab.h>
19 #include <linux/workqueue.h>
20 #include <linux/export.h>
21 #include <linux/debugfs.h>
22 #include <sound/core.h>
23 #include <sound/pcm.h>
24 #include <sound/pcm_params.h>
25 #include <sound/soc.h>
26 #include <sound/soc-dpcm.h>
27 #include <sound/initval.h>
28
29 #define DPCM_MAX_BE_USERS 8
30
31 /**
32 * snd_soc_runtime_activate() - Increment active count for PCM runtime components
33 * @rtd: ASoC PCM runtime that is activated
34 * @stream: Direction of the PCM stream
35 *
36 * Increments the active count for all the DAIs and components attached to a PCM
37 * runtime. Should typically be called when a stream is opened.
38 *
39 * Must be called with the rtd->card->pcm_mutex being held
40 */
41 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
42 {
43 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
44 struct snd_soc_dai *codec_dai;
45 int i;
46
47 lockdep_assert_held(&rtd->card->pcm_mutex);
48
49 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
50 cpu_dai->playback_active++;
51 for_each_rtd_codec_dai(rtd, i, codec_dai)
52 codec_dai->playback_active++;
53 } else {
54 cpu_dai->capture_active++;
55 for_each_rtd_codec_dai(rtd, i, codec_dai)
56 codec_dai->capture_active++;
57 }
58
59 cpu_dai->active++;
60 cpu_dai->component->active++;
61 for_each_rtd_codec_dai(rtd, i, codec_dai) {
62 codec_dai->active++;
63 codec_dai->component->active++;
64 }
65 }
66
67 /**
68 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
69 * @rtd: ASoC PCM runtime that is deactivated
70 * @stream: Direction of the PCM stream
71 *
72 * Decrements the active count for all the DAIs and components attached to a PCM
73 * runtime. Should typically be called when a stream is closed.
74 *
75 * Must be called with the rtd->card->pcm_mutex being held
76 */
77 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
78 {
79 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
80 struct snd_soc_dai *codec_dai;
81 int i;
82
83 lockdep_assert_held(&rtd->card->pcm_mutex);
84
85 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
86 cpu_dai->playback_active--;
87 for_each_rtd_codec_dai(rtd, i, codec_dai)
88 codec_dai->playback_active--;
89 } else {
90 cpu_dai->capture_active--;
91 for_each_rtd_codec_dai(rtd, i, codec_dai)
92 codec_dai->capture_active--;
93 }
94
95 cpu_dai->active--;
96 cpu_dai->component->active--;
97 for_each_rtd_codec_dai(rtd, i, codec_dai) {
98 codec_dai->component->active--;
99 codec_dai->active--;
100 }
101 }
102
103 /**
104 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
105 * @rtd: The ASoC PCM runtime that should be checked.
106 *
107 * This function checks whether the power down delay should be ignored for a
108 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
109 * been configured to ignore the delay, or if none of the components benefits
110 * from having the delay.
111 */
112 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
113 {
114 struct snd_soc_rtdcom_list *rtdcom;
115 struct snd_soc_component *component;
116 bool ignore = true;
117
118 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
119 return true;
120
121 for_each_rtd_components(rtd, rtdcom, component)
122 ignore &= !component->driver->use_pmdown_time;
123
124 return ignore;
125 }
126
127 /**
128 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
129 * @substream: the pcm substream
130 * @hw: the hardware parameters
131 *
132 * Sets the substream runtime hardware parameters.
133 */
134 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
135 const struct snd_pcm_hardware *hw)
136 {
137 struct snd_pcm_runtime *runtime = substream->runtime;
138 runtime->hw.info = hw->info;
139 runtime->hw.formats = hw->formats;
140 runtime->hw.period_bytes_min = hw->period_bytes_min;
141 runtime->hw.period_bytes_max = hw->period_bytes_max;
142 runtime->hw.periods_min = hw->periods_min;
143 runtime->hw.periods_max = hw->periods_max;
144 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
145 runtime->hw.fifo_size = hw->fifo_size;
146 return 0;
147 }
148 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
149
150 /* DPCM stream event, send event to FE and all active BEs. */
151 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
152 int event)
153 {
154 struct snd_soc_dpcm *dpcm;
155
156 for_each_dpcm_be(fe, dir, dpcm) {
157
158 struct snd_soc_pcm_runtime *be = dpcm->be;
159
160 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
161 be->dai_link->name, event, dir);
162
163 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
164 (be->dpcm[dir].users >= 1))
165 continue;
166
167 snd_soc_dapm_stream_event(be, dir, event);
168 }
169
170 snd_soc_dapm_stream_event(fe, dir, event);
171
172 return 0;
173 }
174
175 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
176 struct snd_soc_dai *soc_dai)
177 {
178 struct snd_soc_pcm_runtime *rtd = substream->private_data;
179 int ret;
180
181 if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
182 rtd->dai_link->symmetric_rates)) {
183 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
184 soc_dai->rate);
185
186 ret = snd_pcm_hw_constraint_single(substream->runtime,
187 SNDRV_PCM_HW_PARAM_RATE,
188 soc_dai->rate);
189 if (ret < 0) {
190 dev_err(soc_dai->dev,
191 "ASoC: Unable to apply rate constraint: %d\n",
192 ret);
193 return ret;
194 }
195 }
196
197 if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
198 rtd->dai_link->symmetric_channels)) {
199 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
200 soc_dai->channels);
201
202 ret = snd_pcm_hw_constraint_single(substream->runtime,
203 SNDRV_PCM_HW_PARAM_CHANNELS,
204 soc_dai->channels);
205 if (ret < 0) {
206 dev_err(soc_dai->dev,
207 "ASoC: Unable to apply channel symmetry constraint: %d\n",
208 ret);
209 return ret;
210 }
211 }
212
213 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
214 rtd->dai_link->symmetric_samplebits)) {
215 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
216 soc_dai->sample_bits);
217
218 ret = snd_pcm_hw_constraint_single(substream->runtime,
219 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
220 soc_dai->sample_bits);
221 if (ret < 0) {
222 dev_err(soc_dai->dev,
223 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
224 ret);
225 return ret;
226 }
227 }
228
229 return 0;
230 }
231
232 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
233 struct snd_pcm_hw_params *params)
234 {
235 struct snd_soc_pcm_runtime *rtd = substream->private_data;
236 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
237 struct snd_soc_dai *codec_dai;
238 unsigned int rate, channels, sample_bits, symmetry, i;
239
240 rate = params_rate(params);
241 channels = params_channels(params);
242 sample_bits = snd_pcm_format_physical_width(params_format(params));
243
244 /* reject unmatched parameters when applying symmetry */
245 symmetry = cpu_dai->driver->symmetric_rates ||
246 rtd->dai_link->symmetric_rates;
247
248 for_each_rtd_codec_dai(rtd, i, codec_dai)
249 symmetry |= codec_dai->driver->symmetric_rates;
250
251 if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
252 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
253 cpu_dai->rate, rate);
254 return -EINVAL;
255 }
256
257 symmetry = cpu_dai->driver->symmetric_channels ||
258 rtd->dai_link->symmetric_channels;
259
260 for_each_rtd_codec_dai(rtd, i, codec_dai)
261 symmetry |= codec_dai->driver->symmetric_channels;
262
263 if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
264 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
265 cpu_dai->channels, channels);
266 return -EINVAL;
267 }
268
269 symmetry = cpu_dai->driver->symmetric_samplebits ||
270 rtd->dai_link->symmetric_samplebits;
271
272 for_each_rtd_codec_dai(rtd, i, codec_dai)
273 symmetry |= codec_dai->driver->symmetric_samplebits;
274
275 if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
276 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
277 cpu_dai->sample_bits, sample_bits);
278 return -EINVAL;
279 }
280
281 return 0;
282 }
283
284 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
285 {
286 struct snd_soc_pcm_runtime *rtd = substream->private_data;
287 struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
288 struct snd_soc_dai_link *link = rtd->dai_link;
289 struct snd_soc_dai *codec_dai;
290 unsigned int symmetry, i;
291
292 symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
293 cpu_driver->symmetric_channels || link->symmetric_channels ||
294 cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
295
296 for_each_rtd_codec_dai(rtd, i, codec_dai)
297 symmetry = symmetry ||
298 codec_dai->driver->symmetric_rates ||
299 codec_dai->driver->symmetric_channels ||
300 codec_dai->driver->symmetric_samplebits;
301
302 return symmetry;
303 }
304
305 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
306 {
307 struct snd_soc_pcm_runtime *rtd = substream->private_data;
308 int ret;
309
310 if (!bits)
311 return;
312
313 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
314 if (ret != 0)
315 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
316 bits, ret);
317 }
318
319 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
320 {
321 struct snd_soc_pcm_runtime *rtd = substream->private_data;
322 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
323 struct snd_soc_dai *codec_dai;
324 int i;
325 unsigned int bits = 0, cpu_bits;
326
327 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
328 for_each_rtd_codec_dai(rtd, i, codec_dai) {
329 if (codec_dai->driver->playback.sig_bits == 0) {
330 bits = 0;
331 break;
332 }
333 bits = max(codec_dai->driver->playback.sig_bits, bits);
334 }
335 cpu_bits = cpu_dai->driver->playback.sig_bits;
336 } else {
337 for_each_rtd_codec_dai(rtd, i, codec_dai) {
338 if (codec_dai->driver->capture.sig_bits == 0) {
339 bits = 0;
340 break;
341 }
342 bits = max(codec_dai->driver->capture.sig_bits, bits);
343 }
344 cpu_bits = cpu_dai->driver->capture.sig_bits;
345 }
346
347 soc_pcm_set_msb(substream, bits);
348 soc_pcm_set_msb(substream, cpu_bits);
349 }
350
351 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
352 {
353 struct snd_pcm_runtime *runtime = substream->runtime;
354 struct snd_pcm_hardware *hw = &runtime->hw;
355 struct snd_soc_pcm_runtime *rtd = substream->private_data;
356 struct snd_soc_dai *codec_dai;
357 struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
358 struct snd_soc_dai_driver *codec_dai_drv;
359 struct snd_soc_pcm_stream *codec_stream;
360 struct snd_soc_pcm_stream *cpu_stream;
361 unsigned int chan_min = 0, chan_max = UINT_MAX;
362 unsigned int rate_min = 0, rate_max = UINT_MAX;
363 unsigned int rates = UINT_MAX;
364 u64 formats = ULLONG_MAX;
365 int i;
366
367 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
368 cpu_stream = &cpu_dai_drv->playback;
369 else
370 cpu_stream = &cpu_dai_drv->capture;
371
372 /* first calculate min/max only for CODECs in the DAI link */
373 for_each_rtd_codec_dai(rtd, i, codec_dai) {
374
375 /*
376 * Skip CODECs which don't support the current stream type.
377 * Otherwise, since the rate, channel, and format values will
378 * zero in that case, we would have no usable settings left,
379 * causing the resulting setup to fail.
380 * At least one CODEC should match, otherwise we should have
381 * bailed out on a higher level, since there would be no
382 * CODEC to support the transfer direction in that case.
383 */
384 if (!snd_soc_dai_stream_valid(codec_dai,
385 substream->stream))
386 continue;
387
388 codec_dai_drv = codec_dai->driver;
389 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
390 codec_stream = &codec_dai_drv->playback;
391 else
392 codec_stream = &codec_dai_drv->capture;
393 chan_min = max(chan_min, codec_stream->channels_min);
394 chan_max = min(chan_max, codec_stream->channels_max);
395 rate_min = max(rate_min, codec_stream->rate_min);
396 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
397 formats &= codec_stream->formats;
398 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
399 }
400
401 /*
402 * chan min/max cannot be enforced if there are multiple CODEC DAIs
403 * connected to a single CPU DAI, use CPU DAI's directly and let
404 * channel allocation be fixed up later
405 */
406 if (rtd->num_codecs > 1) {
407 chan_min = cpu_stream->channels_min;
408 chan_max = cpu_stream->channels_max;
409 }
410
411 hw->channels_min = max(chan_min, cpu_stream->channels_min);
412 hw->channels_max = min(chan_max, cpu_stream->channels_max);
413 if (hw->formats)
414 hw->formats &= formats & cpu_stream->formats;
415 else
416 hw->formats = formats & cpu_stream->formats;
417 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
418
419 snd_pcm_limit_hw_rates(runtime);
420
421 hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
422 hw->rate_min = max(hw->rate_min, rate_min);
423 hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
424 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
425 }
426
427 static int soc_pcm_components_open(struct snd_pcm_substream *substream,
428 struct snd_soc_component **last)
429 {
430 struct snd_soc_pcm_runtime *rtd = substream->private_data;
431 struct snd_soc_rtdcom_list *rtdcom;
432 struct snd_soc_component *component;
433 int ret = 0;
434
435 for_each_rtd_components(rtd, rtdcom, component) {
436 *last = component;
437
438 ret = snd_soc_component_module_get_when_open(component);
439 if (ret < 0) {
440 dev_err(component->dev,
441 "ASoC: can't get module %s\n",
442 component->name);
443 return ret;
444 }
445
446 ret = snd_soc_component_open(component, substream);
447 if (ret < 0) {
448 dev_err(component->dev,
449 "ASoC: can't open component %s: %d\n",
450 component->name, ret);
451 return ret;
452 }
453 }
454 *last = NULL;
455 return 0;
456 }
457
458 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
459 struct snd_soc_component *last)
460 {
461 struct snd_soc_pcm_runtime *rtd = substream->private_data;
462 struct snd_soc_rtdcom_list *rtdcom;
463 struct snd_soc_component *component;
464 int ret = 0;
465
466 for_each_rtd_components(rtd, rtdcom, component) {
467 if (component == last)
468 break;
469
470 ret |= snd_soc_component_close(component, substream);
471 snd_soc_component_module_put_when_close(component);
472 }
473
474 return ret;
475 }
476
477 /*
478 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
479 * then initialized and any private data can be allocated. This also calls
480 * startup for the cpu DAI, component, machine and codec DAI.
481 */
482 static int soc_pcm_open(struct snd_pcm_substream *substream)
483 {
484 struct snd_soc_pcm_runtime *rtd = substream->private_data;
485 struct snd_pcm_runtime *runtime = substream->runtime;
486 struct snd_soc_component *component;
487 struct snd_soc_rtdcom_list *rtdcom;
488 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
489 struct snd_soc_dai *codec_dai;
490 const char *codec_dai_name = "multicodec";
491 int i, ret = 0;
492
493 pinctrl_pm_select_default_state(cpu_dai->dev);
494 for_each_rtd_codec_dai(rtd, i, codec_dai)
495 pinctrl_pm_select_default_state(codec_dai->dev);
496
497 for_each_rtd_components(rtd, rtdcom, component) {
498 pm_runtime_get_sync(component->dev);
499 }
500
501 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
502
503 /* startup the audio subsystem */
504 ret = snd_soc_dai_startup(cpu_dai, substream);
505 if (ret < 0) {
506 dev_err(cpu_dai->dev, "ASoC: can't open interface %s: %d\n",
507 cpu_dai->name, ret);
508 goto out;
509 }
510
511 ret = soc_pcm_components_open(substream, &component);
512 if (ret < 0)
513 goto component_err;
514
515 for_each_rtd_codec_dai(rtd, i, codec_dai) {
516 ret = snd_soc_dai_startup(codec_dai, substream);
517 if (ret < 0) {
518 dev_err(codec_dai->dev,
519 "ASoC: can't open codec %s: %d\n",
520 codec_dai->name, ret);
521 goto codec_dai_err;
522 }
523
524 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
525 codec_dai->tx_mask = 0;
526 else
527 codec_dai->rx_mask = 0;
528 }
529
530 if (rtd->dai_link->ops->startup) {
531 ret = rtd->dai_link->ops->startup(substream);
532 if (ret < 0) {
533 pr_err("ASoC: %s startup failed: %d\n",
534 rtd->dai_link->name, ret);
535 goto machine_err;
536 }
537 }
538
539 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
540 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
541 goto dynamic;
542
543 /* Check that the codec and cpu DAIs are compatible */
544 soc_pcm_init_runtime_hw(substream);
545
546 if (rtd->num_codecs == 1)
547 codec_dai_name = rtd->codec_dai->name;
548
549 if (soc_pcm_has_symmetry(substream))
550 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
551
552 ret = -EINVAL;
553 if (!runtime->hw.rates) {
554 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
555 codec_dai_name, cpu_dai->name);
556 goto config_err;
557 }
558 if (!runtime->hw.formats) {
559 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
560 codec_dai_name, cpu_dai->name);
561 goto config_err;
562 }
563 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
564 runtime->hw.channels_min > runtime->hw.channels_max) {
565 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
566 codec_dai_name, cpu_dai->name);
567 goto config_err;
568 }
569
570 soc_pcm_apply_msb(substream);
571
572 /* Symmetry only applies if we've already got an active stream. */
573 if (cpu_dai->active) {
574 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
575 if (ret != 0)
576 goto config_err;
577 }
578
579 for_each_rtd_codec_dai(rtd, i, codec_dai) {
580 if (codec_dai->active) {
581 ret = soc_pcm_apply_symmetry(substream, codec_dai);
582 if (ret != 0)
583 goto config_err;
584 }
585 }
586
587 pr_debug("ASoC: %s <-> %s info:\n",
588 codec_dai_name, cpu_dai->name);
589 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
590 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
591 runtime->hw.channels_max);
592 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
593 runtime->hw.rate_max);
594
595 dynamic:
596
597 snd_soc_runtime_activate(rtd, substream->stream);
598
599 mutex_unlock(&rtd->card->pcm_mutex);
600 return 0;
601
602 config_err:
603 if (rtd->dai_link->ops->shutdown)
604 rtd->dai_link->ops->shutdown(substream);
605
606 machine_err:
607 i = rtd->num_codecs;
608
609 codec_dai_err:
610 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai)
611 snd_soc_dai_shutdown(codec_dai, substream);
612
613 component_err:
614 soc_pcm_components_close(substream, component);
615
616 snd_soc_dai_shutdown(cpu_dai, substream);
617 out:
618 mutex_unlock(&rtd->card->pcm_mutex);
619
620 for_each_rtd_components(rtd, rtdcom, component) {
621 pm_runtime_mark_last_busy(component->dev);
622 pm_runtime_put_autosuspend(component->dev);
623 }
624
625 for_each_rtd_codec_dai(rtd, i, codec_dai) {
626 if (!codec_dai->active)
627 pinctrl_pm_select_sleep_state(codec_dai->dev);
628 }
629 if (!cpu_dai->active)
630 pinctrl_pm_select_sleep_state(cpu_dai->dev);
631
632 return ret;
633 }
634
635 /*
636 * Power down the audio subsystem pmdown_time msecs after close is called.
637 * This is to ensure there are no pops or clicks in between any music tracks
638 * due to DAPM power cycling.
639 */
640 static void close_delayed_work(struct snd_soc_pcm_runtime *rtd)
641 {
642 struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
643
644 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
645
646 dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
647 codec_dai->driver->playback.stream_name,
648 codec_dai->playback_active ? "active" : "inactive",
649 rtd->pop_wait ? "yes" : "no");
650
651 /* are we waiting on this codec DAI stream */
652 if (rtd->pop_wait == 1) {
653 rtd->pop_wait = 0;
654 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
655 SND_SOC_DAPM_STREAM_STOP);
656 }
657
658 mutex_unlock(&rtd->card->pcm_mutex);
659 }
660
661 static void codec2codec_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
662 {
663 /*
664 * Currently nothing to do for c2c links
665 * Since c2c links are internal nodes in the DAPM graph and
666 * don't interface with the outside world or application layer
667 * we don't have to do any special handling on close.
668 */
669 }
670
671 /*
672 * Called by ALSA when a PCM substream is closed. Private data can be
673 * freed here. The cpu DAI, codec DAI, machine and components are also
674 * shutdown.
675 */
676 static int soc_pcm_close(struct snd_pcm_substream *substream)
677 {
678 struct snd_soc_pcm_runtime *rtd = substream->private_data;
679 struct snd_soc_component *component;
680 struct snd_soc_rtdcom_list *rtdcom;
681 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
682 struct snd_soc_dai *codec_dai;
683 int i;
684
685 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
686
687 snd_soc_runtime_deactivate(rtd, substream->stream);
688
689 /* clear the corresponding DAIs rate when inactive */
690 if (!cpu_dai->active)
691 cpu_dai->rate = 0;
692
693 for_each_rtd_codec_dai(rtd, i, codec_dai) {
694 if (!codec_dai->active)
695 codec_dai->rate = 0;
696 }
697
698 snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
699
700 snd_soc_dai_shutdown(cpu_dai, substream);
701
702 for_each_rtd_codec_dai(rtd, i, codec_dai)
703 snd_soc_dai_shutdown(codec_dai, substream);
704
705 if (rtd->dai_link->ops->shutdown)
706 rtd->dai_link->ops->shutdown(substream);
707
708 soc_pcm_components_close(substream, NULL);
709
710 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
711 if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
712 /* powered down playback stream now */
713 snd_soc_dapm_stream_event(rtd,
714 SNDRV_PCM_STREAM_PLAYBACK,
715 SND_SOC_DAPM_STREAM_STOP);
716 } else {
717 /* start delayed pop wq here for playback streams */
718 rtd->pop_wait = 1;
719 queue_delayed_work(system_power_efficient_wq,
720 &rtd->delayed_work,
721 msecs_to_jiffies(rtd->pmdown_time));
722 }
723 } else {
724 /* capture streams can be powered down now */
725 snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
726 SND_SOC_DAPM_STREAM_STOP);
727 }
728
729 mutex_unlock(&rtd->card->pcm_mutex);
730
731 for_each_rtd_components(rtd, rtdcom, component) {
732 pm_runtime_mark_last_busy(component->dev);
733 pm_runtime_put_autosuspend(component->dev);
734 }
735
736 for_each_rtd_codec_dai(rtd, i, codec_dai) {
737 if (!codec_dai->active)
738 pinctrl_pm_select_sleep_state(codec_dai->dev);
739 }
740 if (!cpu_dai->active)
741 pinctrl_pm_select_sleep_state(cpu_dai->dev);
742
743 return 0;
744 }
745
746 /*
747 * Called by ALSA when the PCM substream is prepared, can set format, sample
748 * rate, etc. This function is non atomic and can be called multiple times,
749 * it can refer to the runtime info.
750 */
751 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
752 {
753 struct snd_soc_pcm_runtime *rtd = substream->private_data;
754 struct snd_soc_component *component;
755 struct snd_soc_rtdcom_list *rtdcom;
756 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
757 struct snd_soc_dai *codec_dai;
758 int i, ret = 0;
759
760 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
761
762 if (rtd->dai_link->ops->prepare) {
763 ret = rtd->dai_link->ops->prepare(substream);
764 if (ret < 0) {
765 dev_err(rtd->card->dev, "ASoC: machine prepare error:"
766 " %d\n", ret);
767 goto out;
768 }
769 }
770
771 for_each_rtd_components(rtd, rtdcom, component) {
772 ret = snd_soc_component_prepare(component, substream);
773 if (ret < 0) {
774 dev_err(component->dev,
775 "ASoC: platform prepare error: %d\n", ret);
776 goto out;
777 }
778 }
779
780 for_each_rtd_codec_dai(rtd, i, codec_dai) {
781 ret = snd_soc_dai_prepare(codec_dai, substream);
782 if (ret < 0) {
783 dev_err(codec_dai->dev,
784 "ASoC: codec DAI prepare error: %d\n",
785 ret);
786 goto out;
787 }
788 }
789
790 ret = snd_soc_dai_prepare(cpu_dai, substream);
791 if (ret < 0) {
792 dev_err(cpu_dai->dev,
793 "ASoC: cpu DAI prepare error: %d\n", ret);
794 goto out;
795 }
796
797 /* cancel any delayed stream shutdown that is pending */
798 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
799 rtd->pop_wait) {
800 rtd->pop_wait = 0;
801 cancel_delayed_work(&rtd->delayed_work);
802 }
803
804 snd_soc_dapm_stream_event(rtd, substream->stream,
805 SND_SOC_DAPM_STREAM_START);
806
807 for_each_rtd_codec_dai(rtd, i, codec_dai)
808 snd_soc_dai_digital_mute(codec_dai, 0,
809 substream->stream);
810 snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
811
812 out:
813 mutex_unlock(&rtd->card->pcm_mutex);
814 return ret;
815 }
816
817 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
818 unsigned int mask)
819 {
820 struct snd_interval *interval;
821 int channels = hweight_long(mask);
822
823 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
824 interval->min = channels;
825 interval->max = channels;
826 }
827
828 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
829 struct snd_soc_component *last)
830 {
831 struct snd_soc_pcm_runtime *rtd = substream->private_data;
832 struct snd_soc_rtdcom_list *rtdcom;
833 struct snd_soc_component *component;
834 int ret = 0;
835
836 for_each_rtd_components(rtd, rtdcom, component) {
837 if (component == last)
838 break;
839
840 ret |= snd_soc_component_hw_free(component, substream);
841 }
842
843 return ret;
844 }
845
846 /*
847 * Called by ALSA when the hardware params are set by application. This
848 * function can also be called multiple times and can allocate buffers
849 * (using snd_pcm_lib_* ). It's non-atomic.
850 */
851 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
852 struct snd_pcm_hw_params *params)
853 {
854 struct snd_soc_pcm_runtime *rtd = substream->private_data;
855 struct snd_soc_component *component;
856 struct snd_soc_rtdcom_list *rtdcom;
857 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
858 struct snd_soc_dai *codec_dai;
859 int i, ret = 0;
860
861 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
862
863 ret = soc_pcm_params_symmetry(substream, params);
864 if (ret)
865 goto out;
866
867 if (rtd->dai_link->ops->hw_params) {
868 ret = rtd->dai_link->ops->hw_params(substream, params);
869 if (ret < 0) {
870 dev_err(rtd->card->dev, "ASoC: machine hw_params"
871 " failed: %d\n", ret);
872 goto out;
873 }
874 }
875
876 for_each_rtd_codec_dai(rtd, i, codec_dai) {
877 struct snd_pcm_hw_params codec_params;
878
879 /*
880 * Skip CODECs which don't support the current stream type,
881 * the idea being that if a CODEC is not used for the currently
882 * set up transfer direction, it should not need to be
883 * configured, especially since the configuration used might
884 * not even be supported by that CODEC. There may be cases
885 * however where a CODEC needs to be set up although it is
886 * actually not being used for the transfer, e.g. if a
887 * capture-only CODEC is acting as an LRCLK and/or BCLK master
888 * for the DAI link including a playback-only CODEC.
889 * If this becomes necessary, we will have to augment the
890 * machine driver setup with information on how to act, so
891 * we can do the right thing here.
892 */
893 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
894 continue;
895
896 /* copy params for each codec */
897 codec_params = *params;
898
899 /* fixup params based on TDM slot masks */
900 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
901 codec_dai->tx_mask)
902 soc_pcm_codec_params_fixup(&codec_params,
903 codec_dai->tx_mask);
904
905 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
906 codec_dai->rx_mask)
907 soc_pcm_codec_params_fixup(&codec_params,
908 codec_dai->rx_mask);
909
910 ret = snd_soc_dai_hw_params(codec_dai, substream,
911 &codec_params);
912 if(ret < 0)
913 goto codec_err;
914
915 codec_dai->rate = params_rate(&codec_params);
916 codec_dai->channels = params_channels(&codec_params);
917 codec_dai->sample_bits = snd_pcm_format_physical_width(
918 params_format(&codec_params));
919
920 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
921 }
922
923 ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
924 if (ret < 0)
925 goto interface_err;
926
927 /* store the parameters for each DAIs */
928 cpu_dai->rate = params_rate(params);
929 cpu_dai->channels = params_channels(params);
930 cpu_dai->sample_bits =
931 snd_pcm_format_physical_width(params_format(params));
932
933 snd_soc_dapm_update_dai(substream, params, cpu_dai);
934
935 for_each_rtd_components(rtd, rtdcom, component) {
936 ret = snd_soc_component_hw_params(component, substream, params);
937 if (ret < 0) {
938 dev_err(component->dev,
939 "ASoC: %s hw params failed: %d\n",
940 component->name, ret);
941 goto component_err;
942 }
943 }
944 component = NULL;
945
946 out:
947 mutex_unlock(&rtd->card->pcm_mutex);
948 return ret;
949
950 component_err:
951 soc_pcm_components_hw_free(substream, component);
952
953 snd_soc_dai_hw_free(cpu_dai, substream);
954 cpu_dai->rate = 0;
955
956 interface_err:
957 i = rtd->num_codecs;
958
959 codec_err:
960 for_each_rtd_codec_dai_rollback(rtd, i, codec_dai) {
961 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
962 continue;
963
964 snd_soc_dai_hw_free(codec_dai, substream);
965 codec_dai->rate = 0;
966 }
967
968 if (rtd->dai_link->ops->hw_free)
969 rtd->dai_link->ops->hw_free(substream);
970
971 mutex_unlock(&rtd->card->pcm_mutex);
972 return ret;
973 }
974
975 /*
976 * Frees resources allocated by hw_params, can be called multiple times
977 */
978 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
979 {
980 struct snd_soc_pcm_runtime *rtd = substream->private_data;
981 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
982 struct snd_soc_dai *codec_dai;
983 bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
984 int i;
985
986 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
987
988 /* clear the corresponding DAIs parameters when going to be inactive */
989 if (cpu_dai->active == 1) {
990 cpu_dai->rate = 0;
991 cpu_dai->channels = 0;
992 cpu_dai->sample_bits = 0;
993 }
994
995 for_each_rtd_codec_dai(rtd, i, codec_dai) {
996 if (codec_dai->active == 1) {
997 codec_dai->rate = 0;
998 codec_dai->channels = 0;
999 codec_dai->sample_bits = 0;
1000 }
1001 }
1002
1003 /* apply codec digital mute */
1004 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1005 if ((playback && codec_dai->playback_active == 1) ||
1006 (!playback && codec_dai->capture_active == 1))
1007 snd_soc_dai_digital_mute(codec_dai, 1,
1008 substream->stream);
1009 }
1010
1011 /* free any machine hw params */
1012 if (rtd->dai_link->ops->hw_free)
1013 rtd->dai_link->ops->hw_free(substream);
1014
1015 /* free any component resources */
1016 soc_pcm_components_hw_free(substream, NULL);
1017
1018 /* now free hw params for the DAIs */
1019 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1020 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1021 continue;
1022
1023 snd_soc_dai_hw_free(codec_dai, substream);
1024 }
1025
1026 snd_soc_dai_hw_free(cpu_dai, substream);
1027
1028 mutex_unlock(&rtd->card->pcm_mutex);
1029 return 0;
1030 }
1031
1032 static int soc_pcm_trigger_start(struct snd_pcm_substream *substream, int cmd)
1033 {
1034 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1035 struct snd_soc_component *component;
1036 struct snd_soc_rtdcom_list *rtdcom;
1037 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1038 struct snd_soc_dai *codec_dai;
1039 int i, ret;
1040
1041 if (rtd->dai_link->ops->trigger) {
1042 ret = rtd->dai_link->ops->trigger(substream, cmd);
1043 if (ret < 0)
1044 return ret;
1045 }
1046
1047 for_each_rtd_components(rtd, rtdcom, component) {
1048 ret = snd_soc_component_trigger(component, substream, cmd);
1049 if (ret < 0)
1050 return ret;
1051 }
1052
1053 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1054 if (ret < 0)
1055 return ret;
1056
1057 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1058 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1059 if (ret < 0)
1060 return ret;
1061 }
1062
1063 return 0;
1064 }
1065
1066 static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd)
1067 {
1068 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1069 struct snd_soc_component *component;
1070 struct snd_soc_rtdcom_list *rtdcom;
1071 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1072 struct snd_soc_dai *codec_dai;
1073 int i, ret;
1074
1075 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1076 ret = snd_soc_dai_trigger(codec_dai, substream, cmd);
1077 if (ret < 0)
1078 return ret;
1079 }
1080
1081 ret = snd_soc_dai_trigger(cpu_dai, substream, cmd);
1082 if (ret < 0)
1083 return ret;
1084
1085 for_each_rtd_components(rtd, rtdcom, component) {
1086 ret = snd_soc_component_trigger(component, substream, cmd);
1087 if (ret < 0)
1088 return ret;
1089 }
1090
1091 if (rtd->dai_link->ops->trigger) {
1092 ret = rtd->dai_link->ops->trigger(substream, cmd);
1093 if (ret < 0)
1094 return ret;
1095 }
1096
1097 return 0;
1098 }
1099
1100 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1101 {
1102 int ret;
1103
1104 switch (cmd) {
1105 case SNDRV_PCM_TRIGGER_START:
1106 case SNDRV_PCM_TRIGGER_RESUME:
1107 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1108 ret = soc_pcm_trigger_start(substream, cmd);
1109 break;
1110 case SNDRV_PCM_TRIGGER_STOP:
1111 case SNDRV_PCM_TRIGGER_SUSPEND:
1112 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1113 ret = soc_pcm_trigger_stop(substream, cmd);
1114 break;
1115 default:
1116 return -EINVAL;
1117 }
1118
1119 return ret;
1120 }
1121
1122 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1123 int cmd)
1124 {
1125 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1126 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1127 struct snd_soc_dai *codec_dai;
1128 int i, ret;
1129
1130 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1131 ret = snd_soc_dai_bespoke_trigger(codec_dai, substream, cmd);
1132 if (ret < 0)
1133 return ret;
1134 }
1135
1136 ret = snd_soc_dai_bespoke_trigger(cpu_dai, substream, cmd);
1137 if (ret < 0)
1138 return ret;
1139
1140 return 0;
1141 }
1142 /*
1143 * soc level wrapper for pointer callback
1144 * If cpu_dai, codec_dai, component driver has the delay callback, then
1145 * the runtime->delay will be updated accordingly.
1146 */
1147 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1148 {
1149 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1150 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1151 struct snd_soc_dai *codec_dai;
1152 struct snd_pcm_runtime *runtime = substream->runtime;
1153 snd_pcm_uframes_t offset = 0;
1154 snd_pcm_sframes_t delay = 0;
1155 snd_pcm_sframes_t codec_delay = 0;
1156 int i;
1157
1158 /* clearing the previous total delay */
1159 runtime->delay = 0;
1160
1161 offset = snd_soc_pcm_component_pointer(substream);
1162
1163 /* base delay if assigned in pointer callback */
1164 delay = runtime->delay;
1165
1166 delay += snd_soc_dai_delay(cpu_dai, substream);
1167
1168 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1169 codec_delay = max(codec_delay,
1170 snd_soc_dai_delay(codec_dai, substream));
1171 }
1172 delay += codec_delay;
1173
1174 runtime->delay = delay;
1175
1176 return offset;
1177 }
1178
1179 /* connect a FE and BE */
1180 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1181 struct snd_soc_pcm_runtime *be, int stream)
1182 {
1183 struct snd_soc_dpcm *dpcm;
1184 unsigned long flags;
1185 #ifdef CONFIG_DEBUG_FS
1186 char *name;
1187 #endif
1188
1189 /* only add new dpcms */
1190 for_each_dpcm_be(fe, stream, dpcm) {
1191 if (dpcm->be == be && dpcm->fe == fe)
1192 return 0;
1193 }
1194
1195 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1196 if (!dpcm)
1197 return -ENOMEM;
1198
1199 dpcm->be = be;
1200 dpcm->fe = fe;
1201 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1202 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1203 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1204 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1205 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1206 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1207
1208 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1209 stream ? "capture" : "playback", fe->dai_link->name,
1210 stream ? "<-" : "->", be->dai_link->name);
1211
1212 #ifdef CONFIG_DEBUG_FS
1213 name = kasprintf(GFP_KERNEL, "%s:%s", be->dai_link->name,
1214 stream ? "capture" : "playback");
1215 if (name) {
1216 dpcm->debugfs_state = debugfs_create_dir(name,
1217 fe->debugfs_dpcm_root);
1218 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
1219 &dpcm->state);
1220 kfree(name);
1221 }
1222 #endif
1223 return 1;
1224 }
1225
1226 /* reparent a BE onto another FE */
1227 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1228 struct snd_soc_pcm_runtime *be, int stream)
1229 {
1230 struct snd_soc_dpcm *dpcm;
1231 struct snd_pcm_substream *fe_substream, *be_substream;
1232
1233 /* reparent if BE is connected to other FEs */
1234 if (!be->dpcm[stream].users)
1235 return;
1236
1237 be_substream = snd_soc_dpcm_get_substream(be, stream);
1238
1239 for_each_dpcm_fe(be, stream, dpcm) {
1240 if (dpcm->fe == fe)
1241 continue;
1242
1243 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1244 stream ? "capture" : "playback",
1245 dpcm->fe->dai_link->name,
1246 stream ? "<-" : "->", dpcm->be->dai_link->name);
1247
1248 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1249 be_substream->runtime = fe_substream->runtime;
1250 break;
1251 }
1252 }
1253
1254 /* disconnect a BE and FE */
1255 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1256 {
1257 struct snd_soc_dpcm *dpcm, *d;
1258 unsigned long flags;
1259
1260 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1261 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1262 stream ? "capture" : "playback",
1263 dpcm->be->dai_link->name);
1264
1265 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1266 continue;
1267
1268 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1269 stream ? "capture" : "playback", fe->dai_link->name,
1270 stream ? "<-" : "->", dpcm->be->dai_link->name);
1271
1272 /* BEs still alive need new FE */
1273 dpcm_be_reparent(fe, dpcm->be, stream);
1274
1275 #ifdef CONFIG_DEBUG_FS
1276 debugfs_remove_recursive(dpcm->debugfs_state);
1277 #endif
1278 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1279 list_del(&dpcm->list_be);
1280 list_del(&dpcm->list_fe);
1281 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1282 kfree(dpcm);
1283 }
1284 }
1285
1286 /* get BE for DAI widget and stream */
1287 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1288 struct snd_soc_dapm_widget *widget, int stream)
1289 {
1290 struct snd_soc_pcm_runtime *be;
1291 struct snd_soc_dai *dai;
1292 int i;
1293
1294 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1295
1296 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1297 for_each_card_rtds(card, be) {
1298
1299 if (!be->dai_link->no_pcm)
1300 continue;
1301
1302 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1303 be->cpu_dai->playback_widget ?
1304 be->cpu_dai->playback_widget->name : "(not set)");
1305
1306 if (be->cpu_dai->playback_widget == widget)
1307 return be;
1308
1309 for_each_rtd_codec_dai(be, i, dai) {
1310 if (dai->playback_widget == widget)
1311 return be;
1312 }
1313 }
1314 } else {
1315
1316 for_each_card_rtds(card, be) {
1317
1318 if (!be->dai_link->no_pcm)
1319 continue;
1320
1321 dev_dbg(card->dev, "ASoC: try BE %s\n",
1322 be->cpu_dai->capture_widget ?
1323 be->cpu_dai->capture_widget->name : "(not set)");
1324
1325 if (be->cpu_dai->capture_widget == widget)
1326 return be;
1327
1328 for_each_rtd_codec_dai(be, i, dai) {
1329 if (dai->capture_widget == widget)
1330 return be;
1331 }
1332 }
1333 }
1334
1335 /* dai link name and stream name set correctly ? */
1336 dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
1337 stream ? "capture" : "playback", widget->name);
1338 return NULL;
1339 }
1340
1341 static inline struct snd_soc_dapm_widget *
1342 dai_get_widget(struct snd_soc_dai *dai, int stream)
1343 {
1344 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1345 return dai->playback_widget;
1346 else
1347 return dai->capture_widget;
1348 }
1349
1350 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1351 struct snd_soc_dapm_widget *widget)
1352 {
1353 int i;
1354
1355 for (i = 0; i < list->num_widgets; i++) {
1356 if (widget == list->widgets[i])
1357 return 1;
1358 }
1359
1360 return 0;
1361 }
1362
1363 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1364 enum snd_soc_dapm_direction dir)
1365 {
1366 struct snd_soc_card *card = widget->dapm->card;
1367 struct snd_soc_pcm_runtime *rtd;
1368 struct snd_soc_dai *dai;
1369 int i;
1370
1371 if (dir == SND_SOC_DAPM_DIR_OUT) {
1372 for_each_card_rtds(card, rtd) {
1373 if (!rtd->dai_link->no_pcm)
1374 continue;
1375
1376 if (rtd->cpu_dai->playback_widget == widget)
1377 return true;
1378
1379 for_each_rtd_codec_dai(rtd, i, dai) {
1380 if (dai->playback_widget == widget)
1381 return true;
1382 }
1383 }
1384 } else { /* SND_SOC_DAPM_DIR_IN */
1385 for_each_card_rtds(card, rtd) {
1386 if (!rtd->dai_link->no_pcm)
1387 continue;
1388
1389 if (rtd->cpu_dai->capture_widget == widget)
1390 return true;
1391
1392 for_each_rtd_codec_dai(rtd, i, dai) {
1393 if (dai->capture_widget == widget)
1394 return true;
1395 }
1396 }
1397 }
1398
1399 return false;
1400 }
1401
1402 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1403 int stream, struct snd_soc_dapm_widget_list **list)
1404 {
1405 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1406 int paths;
1407
1408 /* get number of valid DAI paths and their widgets */
1409 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1410 dpcm_end_walk_at_be);
1411
1412 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1413 stream ? "capture" : "playback");
1414
1415 return paths;
1416 }
1417
1418 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1419 struct snd_soc_dapm_widget_list **list_)
1420 {
1421 struct snd_soc_dpcm *dpcm;
1422 struct snd_soc_dapm_widget_list *list = *list_;
1423 struct snd_soc_dapm_widget *widget;
1424 struct snd_soc_dai *dai;
1425 int prune = 0;
1426 int do_prune;
1427
1428 /* Destroy any old FE <--> BE connections */
1429 for_each_dpcm_be(fe, stream, dpcm) {
1430 unsigned int i;
1431
1432 /* is there a valid CPU DAI widget for this BE */
1433 widget = dai_get_widget(dpcm->be->cpu_dai, stream);
1434
1435 /* prune the BE if it's no longer in our active list */
1436 if (widget && widget_in_list(list, widget))
1437 continue;
1438
1439 /* is there a valid CODEC DAI widget for this BE */
1440 do_prune = 1;
1441 for_each_rtd_codec_dai(dpcm->be, i, dai) {
1442 widget = dai_get_widget(dai, stream);
1443
1444 /* prune the BE if it's no longer in our active list */
1445 if (widget && widget_in_list(list, widget))
1446 do_prune = 0;
1447 }
1448 if (!do_prune)
1449 continue;
1450
1451 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1452 stream ? "capture" : "playback",
1453 dpcm->be->dai_link->name, fe->dai_link->name);
1454 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1455 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1456 prune++;
1457 }
1458
1459 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1460 return prune;
1461 }
1462
1463 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1464 struct snd_soc_dapm_widget_list **list_)
1465 {
1466 struct snd_soc_card *card = fe->card;
1467 struct snd_soc_dapm_widget_list *list = *list_;
1468 struct snd_soc_pcm_runtime *be;
1469 int i, new = 0, err;
1470
1471 /* Create any new FE <--> BE connections */
1472 for (i = 0; i < list->num_widgets; i++) {
1473
1474 switch (list->widgets[i]->id) {
1475 case snd_soc_dapm_dai_in:
1476 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1477 continue;
1478 break;
1479 case snd_soc_dapm_dai_out:
1480 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1481 continue;
1482 break;
1483 default:
1484 continue;
1485 }
1486
1487 /* is there a valid BE rtd for this widget */
1488 be = dpcm_get_be(card, list->widgets[i], stream);
1489 if (!be) {
1490 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1491 list->widgets[i]->name);
1492 continue;
1493 }
1494
1495 /* make sure BE is a real BE */
1496 if (!be->dai_link->no_pcm)
1497 continue;
1498
1499 /* don't connect if FE is not running */
1500 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1501 continue;
1502
1503 /* newly connected FE and BE */
1504 err = dpcm_be_connect(fe, be, stream);
1505 if (err < 0) {
1506 dev_err(fe->dev, "ASoC: can't connect %s\n",
1507 list->widgets[i]->name);
1508 break;
1509 } else if (err == 0) /* already connected */
1510 continue;
1511
1512 /* new */
1513 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1514 new++;
1515 }
1516
1517 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1518 return new;
1519 }
1520
1521 /*
1522 * Find the corresponding BE DAIs that source or sink audio to this
1523 * FE substream.
1524 */
1525 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1526 int stream, struct snd_soc_dapm_widget_list **list, int new)
1527 {
1528 if (new)
1529 return dpcm_add_paths(fe, stream, list);
1530 else
1531 return dpcm_prune_paths(fe, stream, list);
1532 }
1533
1534 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1535 {
1536 struct snd_soc_dpcm *dpcm;
1537 unsigned long flags;
1538
1539 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1540 for_each_dpcm_be(fe, stream, dpcm)
1541 dpcm->be->dpcm[stream].runtime_update =
1542 SND_SOC_DPCM_UPDATE_NO;
1543 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1544 }
1545
1546 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1547 int stream)
1548 {
1549 struct snd_soc_dpcm *dpcm;
1550
1551 /* disable any enabled and non active backends */
1552 for_each_dpcm_be(fe, stream, dpcm) {
1553
1554 struct snd_soc_pcm_runtime *be = dpcm->be;
1555 struct snd_pcm_substream *be_substream =
1556 snd_soc_dpcm_get_substream(be, stream);
1557
1558 if (be->dpcm[stream].users == 0)
1559 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1560 stream ? "capture" : "playback",
1561 be->dpcm[stream].state);
1562
1563 if (--be->dpcm[stream].users != 0)
1564 continue;
1565
1566 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1567 continue;
1568
1569 soc_pcm_close(be_substream);
1570 be_substream->runtime = NULL;
1571 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1572 }
1573 }
1574
1575 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1576 {
1577 struct snd_soc_dpcm *dpcm;
1578 int err, count = 0;
1579
1580 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1581 for_each_dpcm_be(fe, stream, dpcm) {
1582
1583 struct snd_soc_pcm_runtime *be = dpcm->be;
1584 struct snd_pcm_substream *be_substream =
1585 snd_soc_dpcm_get_substream(be, stream);
1586
1587 if (!be_substream) {
1588 dev_err(be->dev, "ASoC: no backend %s stream\n",
1589 stream ? "capture" : "playback");
1590 continue;
1591 }
1592
1593 /* is this op for this BE ? */
1594 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1595 continue;
1596
1597 /* first time the dpcm is open ? */
1598 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1599 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1600 stream ? "capture" : "playback",
1601 be->dpcm[stream].state);
1602
1603 if (be->dpcm[stream].users++ != 0)
1604 continue;
1605
1606 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1607 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1608 continue;
1609
1610 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1611 stream ? "capture" : "playback", be->dai_link->name);
1612
1613 be_substream->runtime = be->dpcm[stream].runtime;
1614 err = soc_pcm_open(be_substream);
1615 if (err < 0) {
1616 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1617 be->dpcm[stream].users--;
1618 if (be->dpcm[stream].users < 0)
1619 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1620 stream ? "capture" : "playback",
1621 be->dpcm[stream].state);
1622
1623 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1624 goto unwind;
1625 }
1626
1627 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1628 count++;
1629 }
1630
1631 return count;
1632
1633 unwind:
1634 /* disable any enabled and non active backends */
1635 for_each_dpcm_be_rollback(fe, stream, dpcm) {
1636 struct snd_soc_pcm_runtime *be = dpcm->be;
1637 struct snd_pcm_substream *be_substream =
1638 snd_soc_dpcm_get_substream(be, stream);
1639
1640 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1641 continue;
1642
1643 if (be->dpcm[stream].users == 0)
1644 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1645 stream ? "capture" : "playback",
1646 be->dpcm[stream].state);
1647
1648 if (--be->dpcm[stream].users != 0)
1649 continue;
1650
1651 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1652 continue;
1653
1654 soc_pcm_close(be_substream);
1655 be_substream->runtime = NULL;
1656 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1657 }
1658
1659 return err;
1660 }
1661
1662 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1663 struct snd_soc_pcm_stream *stream)
1664 {
1665 runtime->hw.rate_min = stream->rate_min;
1666 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1667 runtime->hw.channels_min = stream->channels_min;
1668 runtime->hw.channels_max = stream->channels_max;
1669 if (runtime->hw.formats)
1670 runtime->hw.formats &= stream->formats;
1671 else
1672 runtime->hw.formats = stream->formats;
1673 runtime->hw.rates = stream->rates;
1674 }
1675
1676 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1677 u64 *formats)
1678 {
1679 struct snd_soc_pcm_runtime *fe = substream->private_data;
1680 struct snd_soc_dpcm *dpcm;
1681 struct snd_soc_dai *dai;
1682 int stream = substream->stream;
1683
1684 if (!fe->dai_link->dpcm_merged_format)
1685 return;
1686
1687 /*
1688 * It returns merged BE codec format
1689 * if FE want to use it (= dpcm_merged_format)
1690 */
1691
1692 for_each_dpcm_be(fe, stream, dpcm) {
1693 struct snd_soc_pcm_runtime *be = dpcm->be;
1694 struct snd_soc_dai_driver *codec_dai_drv;
1695 struct snd_soc_pcm_stream *codec_stream;
1696 int i;
1697
1698 for_each_rtd_codec_dai(be, i, dai) {
1699 /*
1700 * Skip CODECs which don't support the current stream
1701 * type. See soc_pcm_init_runtime_hw() for more details
1702 */
1703 if (!snd_soc_dai_stream_valid(dai, stream))
1704 continue;
1705
1706 codec_dai_drv = dai->driver;
1707 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1708 codec_stream = &codec_dai_drv->playback;
1709 else
1710 codec_stream = &codec_dai_drv->capture;
1711
1712 *formats &= codec_stream->formats;
1713 }
1714 }
1715 }
1716
1717 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1718 unsigned int *channels_min,
1719 unsigned int *channels_max)
1720 {
1721 struct snd_soc_pcm_runtime *fe = substream->private_data;
1722 struct snd_soc_dpcm *dpcm;
1723 int stream = substream->stream;
1724
1725 if (!fe->dai_link->dpcm_merged_chan)
1726 return;
1727
1728 /*
1729 * It returns merged BE codec channel;
1730 * if FE want to use it (= dpcm_merged_chan)
1731 */
1732
1733 for_each_dpcm_be(fe, stream, dpcm) {
1734 struct snd_soc_pcm_runtime *be = dpcm->be;
1735 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1736 struct snd_soc_dai_driver *codec_dai_drv;
1737 struct snd_soc_pcm_stream *codec_stream;
1738 struct snd_soc_pcm_stream *cpu_stream;
1739
1740 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1741 cpu_stream = &cpu_dai_drv->playback;
1742 else
1743 cpu_stream = &cpu_dai_drv->capture;
1744
1745 *channels_min = max(*channels_min, cpu_stream->channels_min);
1746 *channels_max = min(*channels_max, cpu_stream->channels_max);
1747
1748 /*
1749 * chan min/max cannot be enforced if there are multiple CODEC
1750 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1751 */
1752 if (be->num_codecs == 1) {
1753 codec_dai_drv = be->codec_dais[0]->driver;
1754
1755 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1756 codec_stream = &codec_dai_drv->playback;
1757 else
1758 codec_stream = &codec_dai_drv->capture;
1759
1760 *channels_min = max(*channels_min,
1761 codec_stream->channels_min);
1762 *channels_max = min(*channels_max,
1763 codec_stream->channels_max);
1764 }
1765 }
1766 }
1767
1768 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1769 unsigned int *rates,
1770 unsigned int *rate_min,
1771 unsigned int *rate_max)
1772 {
1773 struct snd_soc_pcm_runtime *fe = substream->private_data;
1774 struct snd_soc_dpcm *dpcm;
1775 int stream = substream->stream;
1776
1777 if (!fe->dai_link->dpcm_merged_rate)
1778 return;
1779
1780 /*
1781 * It returns merged BE codec channel;
1782 * if FE want to use it (= dpcm_merged_chan)
1783 */
1784
1785 for_each_dpcm_be(fe, stream, dpcm) {
1786 struct snd_soc_pcm_runtime *be = dpcm->be;
1787 struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
1788 struct snd_soc_dai_driver *codec_dai_drv;
1789 struct snd_soc_pcm_stream *codec_stream;
1790 struct snd_soc_pcm_stream *cpu_stream;
1791 struct snd_soc_dai *dai;
1792 int i;
1793
1794 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1795 cpu_stream = &cpu_dai_drv->playback;
1796 else
1797 cpu_stream = &cpu_dai_drv->capture;
1798
1799 *rate_min = max(*rate_min, cpu_stream->rate_min);
1800 *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
1801 *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
1802
1803 for_each_rtd_codec_dai(be, i, dai) {
1804 /*
1805 * Skip CODECs which don't support the current stream
1806 * type. See soc_pcm_init_runtime_hw() for more details
1807 */
1808 if (!snd_soc_dai_stream_valid(dai, stream))
1809 continue;
1810
1811 codec_dai_drv = dai->driver;
1812 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1813 codec_stream = &codec_dai_drv->playback;
1814 else
1815 codec_stream = &codec_dai_drv->capture;
1816
1817 *rate_min = max(*rate_min, codec_stream->rate_min);
1818 *rate_max = min_not_zero(*rate_max,
1819 codec_stream->rate_max);
1820 *rates = snd_pcm_rate_mask_intersect(*rates,
1821 codec_stream->rates);
1822 }
1823 }
1824 }
1825
1826 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1827 {
1828 struct snd_pcm_runtime *runtime = substream->runtime;
1829 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1830 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1831 struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
1832
1833 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1834 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
1835 else
1836 dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
1837
1838 dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1839 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1840 &runtime->hw.channels_max);
1841 dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1842 &runtime->hw.rate_min, &runtime->hw.rate_max);
1843 }
1844
1845 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1846
1847 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1848 * for avoiding the race with trigger callback.
1849 * If the state is unset and a trigger is pending while the previous operation,
1850 * process the pending trigger action here.
1851 */
1852 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1853 int stream, enum snd_soc_dpcm_update state)
1854 {
1855 struct snd_pcm_substream *substream =
1856 snd_soc_dpcm_get_substream(fe, stream);
1857
1858 snd_pcm_stream_lock_irq(substream);
1859 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1860 dpcm_fe_dai_do_trigger(substream,
1861 fe->dpcm[stream].trigger_pending - 1);
1862 fe->dpcm[stream].trigger_pending = 0;
1863 }
1864 fe->dpcm[stream].runtime_update = state;
1865 snd_pcm_stream_unlock_irq(substream);
1866 }
1867
1868 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1869 int stream)
1870 {
1871 struct snd_soc_dpcm *dpcm;
1872 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1873 struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
1874 int err;
1875
1876 /* apply symmetry for FE */
1877 if (soc_pcm_has_symmetry(fe_substream))
1878 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1879
1880 /* Symmetry only applies if we've got an active stream. */
1881 if (fe_cpu_dai->active) {
1882 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1883 if (err < 0)
1884 return err;
1885 }
1886
1887 /* apply symmetry for BE */
1888 for_each_dpcm_be(fe, stream, dpcm) {
1889 struct snd_soc_pcm_runtime *be = dpcm->be;
1890 struct snd_pcm_substream *be_substream =
1891 snd_soc_dpcm_get_substream(be, stream);
1892 struct snd_soc_pcm_runtime *rtd;
1893 struct snd_soc_dai *codec_dai;
1894 int i;
1895
1896 /* A backend may not have the requested substream */
1897 if (!be_substream)
1898 continue;
1899
1900 rtd = be_substream->private_data;
1901 if (rtd->dai_link->be_hw_params_fixup)
1902 continue;
1903
1904 if (soc_pcm_has_symmetry(be_substream))
1905 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1906
1907 /* Symmetry only applies if we've got an active stream. */
1908 if (rtd->cpu_dai->active) {
1909 err = soc_pcm_apply_symmetry(fe_substream,
1910 rtd->cpu_dai);
1911 if (err < 0)
1912 return err;
1913 }
1914
1915 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1916 if (codec_dai->active) {
1917 err = soc_pcm_apply_symmetry(fe_substream,
1918 codec_dai);
1919 if (err < 0)
1920 return err;
1921 }
1922 }
1923 }
1924
1925 return 0;
1926 }
1927
1928 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1929 {
1930 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1931 struct snd_pcm_runtime *runtime = fe_substream->runtime;
1932 int stream = fe_substream->stream, ret = 0;
1933
1934 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1935
1936 ret = dpcm_be_dai_startup(fe, fe_substream->stream);
1937 if (ret < 0) {
1938 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
1939 goto be_err;
1940 }
1941
1942 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1943
1944 /* start the DAI frontend */
1945 ret = soc_pcm_open(fe_substream);
1946 if (ret < 0) {
1947 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
1948 goto unwind;
1949 }
1950
1951 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1952
1953 dpcm_set_fe_runtime(fe_substream);
1954 snd_pcm_limit_hw_rates(runtime);
1955
1956 ret = dpcm_apply_symmetry(fe_substream, stream);
1957 if (ret < 0) {
1958 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
1959 ret);
1960 goto unwind;
1961 }
1962
1963 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1964 return 0;
1965
1966 unwind:
1967 dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
1968 be_err:
1969 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
1970 return ret;
1971 }
1972
1973 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
1974 {
1975 struct snd_soc_dpcm *dpcm;
1976
1977 /* only shutdown BEs that are either sinks or sources to this FE DAI */
1978 for_each_dpcm_be(fe, stream, dpcm) {
1979
1980 struct snd_soc_pcm_runtime *be = dpcm->be;
1981 struct snd_pcm_substream *be_substream =
1982 snd_soc_dpcm_get_substream(be, stream);
1983
1984 /* is this op for this BE ? */
1985 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1986 continue;
1987
1988 if (be->dpcm[stream].users == 0)
1989 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1990 stream ? "capture" : "playback",
1991 be->dpcm[stream].state);
1992
1993 if (--be->dpcm[stream].users != 0)
1994 continue;
1995
1996 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
1997 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
1998 soc_pcm_hw_free(be_substream);
1999 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2000 }
2001
2002 dev_dbg(be->dev, "ASoC: close BE %s\n",
2003 be->dai_link->name);
2004
2005 soc_pcm_close(be_substream);
2006 be_substream->runtime = NULL;
2007
2008 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2009 }
2010 return 0;
2011 }
2012
2013 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2014 {
2015 struct snd_soc_pcm_runtime *fe = substream->private_data;
2016 int stream = substream->stream;
2017
2018 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2019
2020 /* shutdown the BEs */
2021 dpcm_be_dai_shutdown(fe, substream->stream);
2022
2023 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2024
2025 /* now shutdown the frontend */
2026 soc_pcm_close(substream);
2027
2028 /* run the stream event for each BE */
2029 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2030
2031 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2032 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2033 return 0;
2034 }
2035
2036 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2037 {
2038 struct snd_soc_dpcm *dpcm;
2039
2040 /* only hw_params backends that are either sinks or sources
2041 * to this frontend DAI */
2042 for_each_dpcm_be(fe, stream, dpcm) {
2043
2044 struct snd_soc_pcm_runtime *be = dpcm->be;
2045 struct snd_pcm_substream *be_substream =
2046 snd_soc_dpcm_get_substream(be, stream);
2047
2048 /* is this op for this BE ? */
2049 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2050 continue;
2051
2052 /* only free hw when no longer used - check all FEs */
2053 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2054 continue;
2055
2056 /* do not free hw if this BE is used by other FE */
2057 if (be->dpcm[stream].users > 1)
2058 continue;
2059
2060 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2061 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2062 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2063 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2064 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2065 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2066 continue;
2067
2068 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2069 be->dai_link->name);
2070
2071 soc_pcm_hw_free(be_substream);
2072
2073 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2074 }
2075
2076 return 0;
2077 }
2078
2079 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2080 {
2081 struct snd_soc_pcm_runtime *fe = substream->private_data;
2082 int err, stream = substream->stream;
2083
2084 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2085 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2086
2087 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2088
2089 /* call hw_free on the frontend */
2090 err = soc_pcm_hw_free(substream);
2091 if (err < 0)
2092 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2093 fe->dai_link->name);
2094
2095 /* only hw_params backends that are either sinks or sources
2096 * to this frontend DAI */
2097 err = dpcm_be_dai_hw_free(fe, stream);
2098
2099 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2100 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2101
2102 mutex_unlock(&fe->card->mutex);
2103 return 0;
2104 }
2105
2106 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2107 {
2108 struct snd_soc_dpcm *dpcm;
2109 int ret;
2110
2111 for_each_dpcm_be(fe, stream, dpcm) {
2112
2113 struct snd_soc_pcm_runtime *be = dpcm->be;
2114 struct snd_pcm_substream *be_substream =
2115 snd_soc_dpcm_get_substream(be, stream);
2116
2117 /* is this op for this BE ? */
2118 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2119 continue;
2120
2121 /* copy params for each dpcm */
2122 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2123 sizeof(struct snd_pcm_hw_params));
2124
2125 /* perform any hw_params fixups */
2126 if (be->dai_link->be_hw_params_fixup) {
2127 ret = be->dai_link->be_hw_params_fixup(be,
2128 &dpcm->hw_params);
2129 if (ret < 0) {
2130 dev_err(be->dev,
2131 "ASoC: hw_params BE fixup failed %d\n",
2132 ret);
2133 goto unwind;
2134 }
2135 }
2136
2137 /* copy the fixed-up hw params for BE dai */
2138 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2139 sizeof(struct snd_pcm_hw_params));
2140
2141 /* only allow hw_params() if no connected FEs are running */
2142 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2143 continue;
2144
2145 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2146 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2147 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2148 continue;
2149
2150 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2151 be->dai_link->name);
2152
2153 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2154 if (ret < 0) {
2155 dev_err(dpcm->be->dev,
2156 "ASoC: hw_params BE failed %d\n", ret);
2157 goto unwind;
2158 }
2159
2160 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2161 }
2162 return 0;
2163
2164 unwind:
2165 /* disable any enabled and non active backends */
2166 for_each_dpcm_be_rollback(fe, stream, dpcm) {
2167 struct snd_soc_pcm_runtime *be = dpcm->be;
2168 struct snd_pcm_substream *be_substream =
2169 snd_soc_dpcm_get_substream(be, stream);
2170
2171 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2172 continue;
2173
2174 /* only allow hw_free() if no connected FEs are running */
2175 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2176 continue;
2177
2178 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2179 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2180 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2181 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2182 continue;
2183
2184 soc_pcm_hw_free(be_substream);
2185 }
2186
2187 return ret;
2188 }
2189
2190 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2191 struct snd_pcm_hw_params *params)
2192 {
2193 struct snd_soc_pcm_runtime *fe = substream->private_data;
2194 int ret, stream = substream->stream;
2195
2196 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2197 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2198
2199 memcpy(&fe->dpcm[substream->stream].hw_params, params,
2200 sizeof(struct snd_pcm_hw_params));
2201 ret = dpcm_be_dai_hw_params(fe, substream->stream);
2202 if (ret < 0) {
2203 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2204 goto out;
2205 }
2206
2207 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2208 fe->dai_link->name, params_rate(params),
2209 params_channels(params), params_format(params));
2210
2211 /* call hw_params on the frontend */
2212 ret = soc_pcm_hw_params(substream, params);
2213 if (ret < 0) {
2214 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2215 dpcm_be_dai_hw_free(fe, stream);
2216 } else
2217 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2218
2219 out:
2220 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2221 mutex_unlock(&fe->card->mutex);
2222 return ret;
2223 }
2224
2225 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2226 struct snd_pcm_substream *substream, int cmd)
2227 {
2228 int ret;
2229
2230 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2231 dpcm->be->dai_link->name, cmd);
2232
2233 ret = soc_pcm_trigger(substream, cmd);
2234 if (ret < 0)
2235 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2236
2237 return ret;
2238 }
2239
2240 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2241 int cmd)
2242 {
2243 struct snd_soc_dpcm *dpcm;
2244 int ret = 0;
2245
2246 for_each_dpcm_be(fe, stream, dpcm) {
2247
2248 struct snd_soc_pcm_runtime *be = dpcm->be;
2249 struct snd_pcm_substream *be_substream =
2250 snd_soc_dpcm_get_substream(be, stream);
2251
2252 /* is this op for this BE ? */
2253 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2254 continue;
2255
2256 switch (cmd) {
2257 case SNDRV_PCM_TRIGGER_START:
2258 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2259 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2260 continue;
2261
2262 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2263 if (ret)
2264 return ret;
2265
2266 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2267 break;
2268 case SNDRV_PCM_TRIGGER_RESUME:
2269 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2270 continue;
2271
2272 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2273 if (ret)
2274 return ret;
2275
2276 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2277 break;
2278 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2279 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2280 continue;
2281
2282 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2283 if (ret)
2284 return ret;
2285
2286 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2287 break;
2288 case SNDRV_PCM_TRIGGER_STOP:
2289 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2290 continue;
2291
2292 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2293 continue;
2294
2295 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2296 if (ret)
2297 return ret;
2298
2299 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2300 break;
2301 case SNDRV_PCM_TRIGGER_SUSPEND:
2302 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2303 continue;
2304
2305 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2306 continue;
2307
2308 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2309 if (ret)
2310 return ret;
2311
2312 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2313 break;
2314 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2315 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2316 continue;
2317
2318 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2319 continue;
2320
2321 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2322 if (ret)
2323 return ret;
2324
2325 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2326 break;
2327 }
2328 }
2329
2330 return ret;
2331 }
2332 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2333
2334 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2335 int cmd, bool fe_first)
2336 {
2337 struct snd_soc_pcm_runtime *fe = substream->private_data;
2338 int ret;
2339
2340 /* call trigger on the frontend before the backend. */
2341 if (fe_first) {
2342 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2343 fe->dai_link->name, cmd);
2344
2345 ret = soc_pcm_trigger(substream, cmd);
2346 if (ret < 0)
2347 return ret;
2348
2349 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2350 return ret;
2351 }
2352
2353 /* call trigger on the frontend after the backend. */
2354 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2355 if (ret < 0)
2356 return ret;
2357
2358 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2359 fe->dai_link->name, cmd);
2360
2361 ret = soc_pcm_trigger(substream, cmd);
2362
2363 return ret;
2364 }
2365
2366 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2367 {
2368 struct snd_soc_pcm_runtime *fe = substream->private_data;
2369 int stream = substream->stream;
2370 int ret = 0;
2371 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2372
2373 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2374
2375 switch (trigger) {
2376 case SND_SOC_DPCM_TRIGGER_PRE:
2377 switch (cmd) {
2378 case SNDRV_PCM_TRIGGER_START:
2379 case SNDRV_PCM_TRIGGER_RESUME:
2380 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2381 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2382 break;
2383 case SNDRV_PCM_TRIGGER_STOP:
2384 case SNDRV_PCM_TRIGGER_SUSPEND:
2385 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2386 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2387 break;
2388 default:
2389 ret = -EINVAL;
2390 break;
2391 }
2392 break;
2393 case SND_SOC_DPCM_TRIGGER_POST:
2394 switch (cmd) {
2395 case SNDRV_PCM_TRIGGER_START:
2396 case SNDRV_PCM_TRIGGER_RESUME:
2397 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2398 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2399 break;
2400 case SNDRV_PCM_TRIGGER_STOP:
2401 case SNDRV_PCM_TRIGGER_SUSPEND:
2402 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2403 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2404 break;
2405 default:
2406 ret = -EINVAL;
2407 break;
2408 }
2409 break;
2410 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2411 /* bespoke trigger() - handles both FE and BEs */
2412
2413 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2414 fe->dai_link->name, cmd);
2415
2416 ret = soc_pcm_bespoke_trigger(substream, cmd);
2417 break;
2418 default:
2419 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2420 fe->dai_link->name);
2421 ret = -EINVAL;
2422 goto out;
2423 }
2424
2425 if (ret < 0) {
2426 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2427 cmd, ret);
2428 goto out;
2429 }
2430
2431 switch (cmd) {
2432 case SNDRV_PCM_TRIGGER_START:
2433 case SNDRV_PCM_TRIGGER_RESUME:
2434 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2435 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2436 break;
2437 case SNDRV_PCM_TRIGGER_STOP:
2438 case SNDRV_PCM_TRIGGER_SUSPEND:
2439 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2440 break;
2441 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2442 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2443 break;
2444 }
2445
2446 out:
2447 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2448 return ret;
2449 }
2450
2451 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2452 {
2453 struct snd_soc_pcm_runtime *fe = substream->private_data;
2454 int stream = substream->stream;
2455
2456 /* if FE's runtime_update is already set, we're in race;
2457 * process this trigger later at exit
2458 */
2459 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2460 fe->dpcm[stream].trigger_pending = cmd + 1;
2461 return 0; /* delayed, assuming it's successful */
2462 }
2463
2464 /* we're alone, let's trigger */
2465 return dpcm_fe_dai_do_trigger(substream, cmd);
2466 }
2467
2468 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2469 {
2470 struct snd_soc_dpcm *dpcm;
2471 int ret = 0;
2472
2473 for_each_dpcm_be(fe, stream, dpcm) {
2474
2475 struct snd_soc_pcm_runtime *be = dpcm->be;
2476 struct snd_pcm_substream *be_substream =
2477 snd_soc_dpcm_get_substream(be, stream);
2478
2479 /* is this op for this BE ? */
2480 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2481 continue;
2482
2483 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2484 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2485 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2486 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2487 continue;
2488
2489 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2490 be->dai_link->name);
2491
2492 ret = soc_pcm_prepare(be_substream);
2493 if (ret < 0) {
2494 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2495 ret);
2496 break;
2497 }
2498
2499 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2500 }
2501 return ret;
2502 }
2503
2504 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2505 {
2506 struct snd_soc_pcm_runtime *fe = substream->private_data;
2507 int stream = substream->stream, ret = 0;
2508
2509 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2510
2511 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2512
2513 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2514
2515 /* there is no point preparing this FE if there are no BEs */
2516 if (list_empty(&fe->dpcm[stream].be_clients)) {
2517 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2518 fe->dai_link->name);
2519 ret = -EINVAL;
2520 goto out;
2521 }
2522
2523 ret = dpcm_be_dai_prepare(fe, substream->stream);
2524 if (ret < 0)
2525 goto out;
2526
2527 /* call prepare on the frontend */
2528 ret = soc_pcm_prepare(substream);
2529 if (ret < 0) {
2530 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2531 fe->dai_link->name);
2532 goto out;
2533 }
2534
2535 /* run the stream event for each BE */
2536 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2537 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2538
2539 out:
2540 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2541 mutex_unlock(&fe->card->mutex);
2542
2543 return ret;
2544 }
2545
2546 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2547 {
2548 struct snd_pcm_substream *substream =
2549 snd_soc_dpcm_get_substream(fe, stream);
2550 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2551 int err;
2552
2553 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2554 stream ? "capture" : "playback", fe->dai_link->name);
2555
2556 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2557 /* call bespoke trigger - FE takes care of all BE triggers */
2558 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2559 fe->dai_link->name);
2560
2561 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2562 if (err < 0)
2563 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2564 } else {
2565 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2566 fe->dai_link->name);
2567
2568 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2569 if (err < 0)
2570 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2571 }
2572
2573 err = dpcm_be_dai_hw_free(fe, stream);
2574 if (err < 0)
2575 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2576
2577 err = dpcm_be_dai_shutdown(fe, stream);
2578 if (err < 0)
2579 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2580
2581 /* run the stream event for each BE */
2582 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2583
2584 return 0;
2585 }
2586
2587 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2588 {
2589 struct snd_pcm_substream *substream =
2590 snd_soc_dpcm_get_substream(fe, stream);
2591 struct snd_soc_dpcm *dpcm;
2592 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2593 int ret;
2594 unsigned long flags;
2595
2596 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2597 stream ? "capture" : "playback", fe->dai_link->name);
2598
2599 /* Only start the BE if the FE is ready */
2600 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2601 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2602 return -EINVAL;
2603
2604 /* startup must always be called for new BEs */
2605 ret = dpcm_be_dai_startup(fe, stream);
2606 if (ret < 0)
2607 goto disconnect;
2608
2609 /* keep going if FE state is > open */
2610 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2611 return 0;
2612
2613 ret = dpcm_be_dai_hw_params(fe, stream);
2614 if (ret < 0)
2615 goto close;
2616
2617 /* keep going if FE state is > hw_params */
2618 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2619 return 0;
2620
2621
2622 ret = dpcm_be_dai_prepare(fe, stream);
2623 if (ret < 0)
2624 goto hw_free;
2625
2626 /* run the stream event for each BE */
2627 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2628
2629 /* keep going if FE state is > prepare */
2630 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2631 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2632 return 0;
2633
2634 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2635 /* call trigger on the frontend - FE takes care of all BE triggers */
2636 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2637 fe->dai_link->name);
2638
2639 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2640 if (ret < 0) {
2641 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2642 goto hw_free;
2643 }
2644 } else {
2645 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2646 fe->dai_link->name);
2647
2648 ret = dpcm_be_dai_trigger(fe, stream,
2649 SNDRV_PCM_TRIGGER_START);
2650 if (ret < 0) {
2651 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2652 goto hw_free;
2653 }
2654 }
2655
2656 return 0;
2657
2658 hw_free:
2659 dpcm_be_dai_hw_free(fe, stream);
2660 close:
2661 dpcm_be_dai_shutdown(fe, stream);
2662 disconnect:
2663 /* disconnect any non started BEs */
2664 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2665 for_each_dpcm_be(fe, stream, dpcm) {
2666 struct snd_soc_pcm_runtime *be = dpcm->be;
2667 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2668 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2669 }
2670 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2671
2672 return ret;
2673 }
2674
2675 static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
2676 {
2677 int ret;
2678
2679 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2680 ret = dpcm_run_update_startup(fe, stream);
2681 if (ret < 0)
2682 dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
2683 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2684
2685 return ret;
2686 }
2687
2688 static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
2689 {
2690 int ret;
2691
2692 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2693 ret = dpcm_run_update_shutdown(fe, stream);
2694 if (ret < 0)
2695 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2696 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2697
2698 return ret;
2699 }
2700
2701 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2702 {
2703 struct snd_soc_dapm_widget_list *list;
2704 int count, paths;
2705
2706 if (!fe->dai_link->dynamic)
2707 return 0;
2708
2709 /* only check active links */
2710 if (!fe->cpu_dai->active)
2711 return 0;
2712
2713 /* DAPM sync will call this to update DSP paths */
2714 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2715 new ? "new" : "old", fe->dai_link->name);
2716
2717 /* skip if FE doesn't have playback capability */
2718 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK) ||
2719 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
2720 goto capture;
2721
2722 /* skip if FE isn't currently playing */
2723 if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
2724 goto capture;
2725
2726 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
2727 if (paths < 0) {
2728 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2729 fe->dai_link->name, "playback");
2730 return paths;
2731 }
2732
2733 /* update any playback paths */
2734 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
2735 if (count) {
2736 if (new)
2737 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2738 else
2739 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
2740
2741 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
2742 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
2743 }
2744
2745 dpcm_path_put(&list);
2746
2747 capture:
2748 /* skip if FE doesn't have capture capability */
2749 if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE) ||
2750 !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE))
2751 return 0;
2752
2753 /* skip if FE isn't currently capturing */
2754 if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
2755 return 0;
2756
2757 paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
2758 if (paths < 0) {
2759 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2760 fe->dai_link->name, "capture");
2761 return paths;
2762 }
2763
2764 /* update any old capture paths */
2765 count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
2766 if (count) {
2767 if (new)
2768 dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2769 else
2770 dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
2771
2772 dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
2773 dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
2774 }
2775
2776 dpcm_path_put(&list);
2777
2778 return 0;
2779 }
2780
2781 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2782 * any DAI links.
2783 */
2784 int soc_dpcm_runtime_update(struct snd_soc_card *card)
2785 {
2786 struct snd_soc_pcm_runtime *fe;
2787 int ret = 0;
2788
2789 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2790 /* shutdown all old paths first */
2791 for_each_card_rtds(card, fe) {
2792 ret = soc_dpcm_fe_runtime_update(fe, 0);
2793 if (ret)
2794 goto out;
2795 }
2796
2797 /* bring new paths up */
2798 for_each_card_rtds(card, fe) {
2799 ret = soc_dpcm_fe_runtime_update(fe, 1);
2800 if (ret)
2801 goto out;
2802 }
2803
2804 out:
2805 mutex_unlock(&card->mutex);
2806 return ret;
2807 }
2808 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
2809 {
2810 struct snd_soc_dpcm *dpcm;
2811 struct snd_soc_dai *dai;
2812
2813 for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
2814
2815 struct snd_soc_pcm_runtime *be = dpcm->be;
2816 int i;
2817
2818 if (be->dai_link->ignore_suspend)
2819 continue;
2820
2821 for_each_rtd_codec_dai(be, i, dai) {
2822 struct snd_soc_dai_driver *drv = dai->driver;
2823
2824 dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
2825 be->dai_link->name);
2826
2827 if (drv->ops && drv->ops->digital_mute &&
2828 dai->playback_active)
2829 drv->ops->digital_mute(dai, mute);
2830 }
2831 }
2832
2833 return 0;
2834 }
2835
2836 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2837 {
2838 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2839 struct snd_soc_dpcm *dpcm;
2840 struct snd_soc_dapm_widget_list *list;
2841 int ret;
2842 int stream = fe_substream->stream;
2843
2844 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2845 fe->dpcm[stream].runtime = fe_substream->runtime;
2846
2847 ret = dpcm_path_get(fe, stream, &list);
2848 if (ret < 0) {
2849 mutex_unlock(&fe->card->mutex);
2850 return ret;
2851 } else if (ret == 0) {
2852 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2853 fe->dai_link->name, stream ? "capture" : "playback");
2854 }
2855
2856 /* calculate valid and active FE <-> BE dpcms */
2857 dpcm_process_paths(fe, stream, &list, 1);
2858
2859 ret = dpcm_fe_dai_startup(fe_substream);
2860 if (ret < 0) {
2861 /* clean up all links */
2862 for_each_dpcm_be(fe, stream, dpcm)
2863 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2864
2865 dpcm_be_disconnect(fe, stream);
2866 fe->dpcm[stream].runtime = NULL;
2867 }
2868
2869 dpcm_clear_pending_state(fe, stream);
2870 dpcm_path_put(&list);
2871 mutex_unlock(&fe->card->mutex);
2872 return ret;
2873 }
2874
2875 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2876 {
2877 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2878 struct snd_soc_dpcm *dpcm;
2879 int stream = fe_substream->stream, ret;
2880
2881 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2882 ret = dpcm_fe_dai_shutdown(fe_substream);
2883
2884 /* mark FE's links ready to prune */
2885 for_each_dpcm_be(fe, stream, dpcm)
2886 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2887
2888 dpcm_be_disconnect(fe, stream);
2889
2890 fe->dpcm[stream].runtime = NULL;
2891 mutex_unlock(&fe->card->mutex);
2892 return ret;
2893 }
2894
2895 /* create a new pcm */
2896 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2897 {
2898 struct snd_soc_dai *codec_dai;
2899 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2900 struct snd_soc_rtdcom_list *rtdcom;
2901 struct snd_soc_component *component;
2902 struct snd_pcm *pcm;
2903 char new_name[64];
2904 int ret = 0, playback = 0, capture = 0;
2905 int i;
2906
2907 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2908 playback = rtd->dai_link->dpcm_playback;
2909 capture = rtd->dai_link->dpcm_capture;
2910 } else {
2911 /* Adapt stream for codec2codec links */
2912 struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
2913 &cpu_dai->driver->playback : &cpu_dai->driver->capture;
2914 struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
2915 &cpu_dai->driver->capture : &cpu_dai->driver->playback;
2916
2917 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2918 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2919 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
2920 playback = 1;
2921 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2922 snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
2923 capture = 1;
2924 }
2925
2926 capture = capture && cpu_capture->channels_min;
2927 playback = playback && cpu_playback->channels_min;
2928 }
2929
2930 if (rtd->dai_link->playback_only) {
2931 playback = 1;
2932 capture = 0;
2933 }
2934
2935 if (rtd->dai_link->capture_only) {
2936 playback = 0;
2937 capture = 1;
2938 }
2939
2940 /* create the PCM */
2941 if (rtd->dai_link->params) {
2942 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2943 rtd->dai_link->stream_name);
2944
2945 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2946 playback, capture, &pcm);
2947 } else if (rtd->dai_link->no_pcm) {
2948 snprintf(new_name, sizeof(new_name), "(%s)",
2949 rtd->dai_link->stream_name);
2950
2951 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2952 playback, capture, &pcm);
2953 } else {
2954 if (rtd->dai_link->dynamic)
2955 snprintf(new_name, sizeof(new_name), "%s (*)",
2956 rtd->dai_link->stream_name);
2957 else
2958 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2959 rtd->dai_link->stream_name,
2960 (rtd->num_codecs > 1) ?
2961 "multicodec" : rtd->codec_dai->name, num);
2962
2963 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2964 capture, &pcm);
2965 }
2966 if (ret < 0) {
2967 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2968 rtd->dai_link->name);
2969 return ret;
2970 }
2971 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2972
2973 /* DAPM dai link stream work */
2974 if (rtd->dai_link->params)
2975 rtd->close_delayed_work_func = codec2codec_close_delayed_work;
2976 else
2977 rtd->close_delayed_work_func = close_delayed_work;
2978
2979 pcm->nonatomic = rtd->dai_link->nonatomic;
2980 rtd->pcm = pcm;
2981 pcm->private_data = rtd;
2982
2983 if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2984 if (playback)
2985 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2986 if (capture)
2987 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2988 goto out;
2989 }
2990
2991 /* ASoC PCM operations */
2992 if (rtd->dai_link->dynamic) {
2993 rtd->ops.open = dpcm_fe_dai_open;
2994 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
2995 rtd->ops.prepare = dpcm_fe_dai_prepare;
2996 rtd->ops.trigger = dpcm_fe_dai_trigger;
2997 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
2998 rtd->ops.close = dpcm_fe_dai_close;
2999 rtd->ops.pointer = soc_pcm_pointer;
3000 } else {
3001 rtd->ops.open = soc_pcm_open;
3002 rtd->ops.hw_params = soc_pcm_hw_params;
3003 rtd->ops.prepare = soc_pcm_prepare;
3004 rtd->ops.trigger = soc_pcm_trigger;
3005 rtd->ops.hw_free = soc_pcm_hw_free;
3006 rtd->ops.close = soc_pcm_close;
3007 rtd->ops.pointer = soc_pcm_pointer;
3008 }
3009
3010 for_each_rtd_components(rtd, rtdcom, component) {
3011 const struct snd_soc_component_driver *drv = component->driver;
3012
3013 if (drv->ioctl)
3014 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
3015 if (drv->sync_stop)
3016 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
3017 if (drv->copy_user)
3018 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
3019 if (drv->page)
3020 rtd->ops.page = snd_soc_pcm_component_page;
3021 if (drv->mmap)
3022 rtd->ops.mmap = snd_soc_pcm_component_mmap;
3023 }
3024
3025 if (playback)
3026 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3027
3028 if (capture)
3029 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3030
3031 ret = snd_soc_pcm_component_new(rtd);
3032 if (ret < 0) {
3033 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
3034 return ret;
3035 }
3036
3037 pcm->no_device_suspend = true;
3038 out:
3039 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3040 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3041 cpu_dai->name);
3042 return ret;
3043 }
3044
3045 /* is the current PCM operation for this FE ? */
3046 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3047 {
3048 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3049 return 1;
3050 return 0;
3051 }
3052 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3053
3054 /* is the current PCM operation for this BE ? */
3055 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3056 struct snd_soc_pcm_runtime *be, int stream)
3057 {
3058 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3059 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3060 be->dpcm[stream].runtime_update))
3061 return 1;
3062 return 0;
3063 }
3064 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3065
3066 /* get the substream for this BE */
3067 struct snd_pcm_substream *
3068 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3069 {
3070 return be->pcm->streams[stream].substream;
3071 }
3072 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3073
3074 /* get the BE runtime state */
3075 enum snd_soc_dpcm_state
3076 snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
3077 {
3078 return be->dpcm[stream].state;
3079 }
3080 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
3081
3082 /* set the BE runtime state */
3083 void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
3084 int stream, enum snd_soc_dpcm_state state)
3085 {
3086 be->dpcm[stream].state = state;
3087 }
3088 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
3089
3090 /*
3091 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3092 * are not running, paused or suspended for the specified stream direction.
3093 */
3094 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3095 struct snd_soc_pcm_runtime *be, int stream)
3096 {
3097 struct snd_soc_dpcm *dpcm;
3098 int state;
3099 int ret = 1;
3100 unsigned long flags;
3101
3102 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3103 for_each_dpcm_fe(be, stream, dpcm) {
3104
3105 if (dpcm->fe == fe)
3106 continue;
3107
3108 state = dpcm->fe->dpcm[stream].state;
3109 if (state == SND_SOC_DPCM_STATE_START ||
3110 state == SND_SOC_DPCM_STATE_PAUSED ||
3111 state == SND_SOC_DPCM_STATE_SUSPEND) {
3112 ret = 0;
3113 break;
3114 }
3115 }
3116 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3117
3118 /* it's safe to free/stop this BE DAI */
3119 return ret;
3120 }
3121 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3122
3123 /*
3124 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3125 * running, paused or suspended for the specified stream direction.
3126 */
3127 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3128 struct snd_soc_pcm_runtime *be, int stream)
3129 {
3130 struct snd_soc_dpcm *dpcm;
3131 int state;
3132 int ret = 1;
3133 unsigned long flags;
3134
3135 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3136 for_each_dpcm_fe(be, stream, dpcm) {
3137
3138 if (dpcm->fe == fe)
3139 continue;
3140
3141 state = dpcm->fe->dpcm[stream].state;
3142 if (state == SND_SOC_DPCM_STATE_START ||
3143 state == SND_SOC_DPCM_STATE_PAUSED ||
3144 state == SND_SOC_DPCM_STATE_SUSPEND ||
3145 state == SND_SOC_DPCM_STATE_PREPARE) {
3146 ret = 0;
3147 break;
3148 }
3149 }
3150 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3151
3152 /* it's safe to change hw_params */
3153 return ret;
3154 }
3155 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
3156
3157 #ifdef CONFIG_DEBUG_FS
3158 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
3159 {
3160 switch (state) {
3161 case SND_SOC_DPCM_STATE_NEW:
3162 return "new";
3163 case SND_SOC_DPCM_STATE_OPEN:
3164 return "open";
3165 case SND_SOC_DPCM_STATE_HW_PARAMS:
3166 return "hw_params";
3167 case SND_SOC_DPCM_STATE_PREPARE:
3168 return "prepare";
3169 case SND_SOC_DPCM_STATE_START:
3170 return "start";
3171 case SND_SOC_DPCM_STATE_STOP:
3172 return "stop";
3173 case SND_SOC_DPCM_STATE_SUSPEND:
3174 return "suspend";
3175 case SND_SOC_DPCM_STATE_PAUSED:
3176 return "paused";
3177 case SND_SOC_DPCM_STATE_HW_FREE:
3178 return "hw_free";
3179 case SND_SOC_DPCM_STATE_CLOSE:
3180 return "close";
3181 }
3182
3183 return "unknown";
3184 }
3185
3186 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
3187 int stream, char *buf, size_t size)
3188 {
3189 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
3190 struct snd_soc_dpcm *dpcm;
3191 ssize_t offset = 0;
3192 unsigned long flags;
3193
3194 /* FE state */
3195 offset += scnprintf(buf + offset, size - offset,
3196 "[%s - %s]\n", fe->dai_link->name,
3197 stream ? "Capture" : "Playback");
3198
3199 offset += scnprintf(buf + offset, size - offset, "State: %s\n",
3200 dpcm_state_string(fe->dpcm[stream].state));
3201
3202 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3203 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3204 offset += scnprintf(buf + offset, size - offset,
3205 "Hardware Params: "
3206 "Format = %s, Channels = %d, Rate = %d\n",
3207 snd_pcm_format_name(params_format(params)),
3208 params_channels(params),
3209 params_rate(params));
3210
3211 /* BEs state */
3212 offset += scnprintf(buf + offset, size - offset, "Backends:\n");
3213
3214 if (list_empty(&fe->dpcm[stream].be_clients)) {
3215 offset += scnprintf(buf + offset, size - offset,
3216 " No active DSP links\n");
3217 goto out;
3218 }
3219
3220 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3221 for_each_dpcm_be(fe, stream, dpcm) {
3222 struct snd_soc_pcm_runtime *be = dpcm->be;
3223 params = &dpcm->hw_params;
3224
3225 offset += scnprintf(buf + offset, size - offset,
3226 "- %s\n", be->dai_link->name);
3227
3228 offset += scnprintf(buf + offset, size - offset,
3229 " State: %s\n",
3230 dpcm_state_string(be->dpcm[stream].state));
3231
3232 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
3233 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
3234 offset += scnprintf(buf + offset, size - offset,
3235 " Hardware Params: "
3236 "Format = %s, Channels = %d, Rate = %d\n",
3237 snd_pcm_format_name(params_format(params)),
3238 params_channels(params),
3239 params_rate(params));
3240 }
3241 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3242 out:
3243 return offset;
3244 }
3245
3246 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
3247 size_t count, loff_t *ppos)
3248 {
3249 struct snd_soc_pcm_runtime *fe = file->private_data;
3250 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
3251 char *buf;
3252
3253 buf = kmalloc(out_count, GFP_KERNEL);
3254 if (!buf)
3255 return -ENOMEM;
3256
3257 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
3258 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
3259 buf + offset, out_count - offset);
3260
3261 if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
3262 offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
3263 buf + offset, out_count - offset);
3264
3265 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
3266
3267 kfree(buf);
3268 return ret;
3269 }
3270
3271 static const struct file_operations dpcm_state_fops = {
3272 .open = simple_open,
3273 .read = dpcm_state_read_file,
3274 .llseek = default_llseek,
3275 };
3276
3277 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
3278 {
3279 if (!rtd->dai_link)
3280 return;
3281
3282 if (!rtd->dai_link->dynamic)
3283 return;
3284
3285 if (!rtd->card->debugfs_card_root)
3286 return;
3287
3288 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
3289 rtd->card->debugfs_card_root);
3290
3291 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
3292 rtd, &dpcm_state_fops);
3293 }
3294 #endif
Linux with added FPC-III support