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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / sound / soc / soc-pcm.c
blob289aebc1552935b273463f579f3d4a865a4f409f
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 #ifdef CONFIG_DEBUG_FS
32 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
33 {
34 switch (state) {
35 case SND_SOC_DPCM_STATE_NEW:
36 return "new";
37 case SND_SOC_DPCM_STATE_OPEN:
38 return "open";
39 case SND_SOC_DPCM_STATE_HW_PARAMS:
40 return "hw_params";
41 case SND_SOC_DPCM_STATE_PREPARE:
42 return "prepare";
43 case SND_SOC_DPCM_STATE_START:
44 return "start";
45 case SND_SOC_DPCM_STATE_STOP:
46 return "stop";
47 case SND_SOC_DPCM_STATE_SUSPEND:
48 return "suspend";
49 case SND_SOC_DPCM_STATE_PAUSED:
50 return "paused";
51 case SND_SOC_DPCM_STATE_HW_FREE:
52 return "hw_free";
53 case SND_SOC_DPCM_STATE_CLOSE:
54 return "close";
55 }
56
57 return "unknown";
58 }
59
60 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
61 int stream, char *buf, size_t size)
62 {
63 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
64 struct snd_soc_dpcm *dpcm;
65 ssize_t offset = 0;
66 unsigned long flags;
67
68 /* FE state */
69 offset += scnprintf(buf + offset, size - offset,
70 "[%s - %s]\n", fe->dai_link->name,
71 stream ? "Capture" : "Playback");
72
73 offset += scnprintf(buf + offset, size - offset, "State: %s\n",
74 dpcm_state_string(fe->dpcm[stream].state));
75
76 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
77 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
78 offset += scnprintf(buf + offset, size - offset,
79 "Hardware Params: "
80 "Format = %s, Channels = %d, Rate = %d\n",
81 snd_pcm_format_name(params_format(params)),
82 params_channels(params),
83 params_rate(params));
84
85 /* BEs state */
86 offset += scnprintf(buf + offset, size - offset, "Backends:\n");
87
88 if (list_empty(&fe->dpcm[stream].be_clients)) {
89 offset += scnprintf(buf + offset, size - offset,
90 " No active DSP links\n");
91 goto out;
92 }
93
94 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
95 for_each_dpcm_be(fe, stream, dpcm) {
96 struct snd_soc_pcm_runtime *be = dpcm->be;
97 params = &dpcm->hw_params;
98
99 offset += scnprintf(buf + offset, size - offset,
100 "- %s\n", be->dai_link->name);
101
102 offset += scnprintf(buf + offset, size - offset,
103 " State: %s\n",
104 dpcm_state_string(be->dpcm[stream].state));
105
106 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
107 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
108 offset += scnprintf(buf + offset, size - offset,
109 " Hardware Params: "
110 "Format = %s, Channels = %d, Rate = %d\n",
111 snd_pcm_format_name(params_format(params)),
112 params_channels(params),
113 params_rate(params));
114 }
115 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
116 out:
117 return offset;
118 }
119
120 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
121 size_t count, loff_t *ppos)
122 {
123 struct snd_soc_pcm_runtime *fe = file->private_data;
124 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
125 int stream;
126 char *buf;
127
128 if (fe->num_cpus > 1) {
129 dev_err(fe->dev,
130 "%s doesn't support Multi CPU yet\n", __func__);
131 return -EINVAL;
132 }
133
134 buf = kmalloc(out_count, GFP_KERNEL);
135 if (!buf)
136 return -ENOMEM;
137
138 for_each_pcm_streams(stream)
139 if (snd_soc_dai_stream_valid(fe->cpu_dai, stream))
140 offset += dpcm_show_state(fe, stream,
141 buf + offset,
142 out_count - offset);
143
144 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
145
146 kfree(buf);
147 return ret;
148 }
149
150 static const struct file_operations dpcm_state_fops = {
151 .open = simple_open,
152 .read = dpcm_state_read_file,
153 .llseek = default_llseek,
154 };
155
156 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
157 {
158 if (!rtd->dai_link)
159 return;
160
161 if (!rtd->dai_link->dynamic)
162 return;
163
164 if (!rtd->card->debugfs_card_root)
165 return;
166
167 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
168 rtd->card->debugfs_card_root);
169
170 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
171 rtd, &dpcm_state_fops);
172 }
173
174 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream)
175 {
176 char *name;
177
178 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name,
179 stream ? "capture" : "playback");
180 if (name) {
181 dpcm->debugfs_state = debugfs_create_dir(
182 name, dpcm->fe->debugfs_dpcm_root);
183 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
184 &dpcm->state);
185 kfree(name);
186 }
187 }
188
189 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
190 {
191 debugfs_remove_recursive(dpcm->debugfs_state);
192 }
193
194 #else
195 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm,
196 int stream)
197 {
198 }
199
200 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
201 {
202 }
203 #endif
204
205 static int soc_rtd_startup(struct snd_soc_pcm_runtime *rtd,
206 struct snd_pcm_substream *substream)
207 {
208 if (rtd->dai_link->ops &&
209 rtd->dai_link->ops->startup)
210 return rtd->dai_link->ops->startup(substream);
211 return 0;
212 }
213
214 static void soc_rtd_shutdown(struct snd_soc_pcm_runtime *rtd,
215 struct snd_pcm_substream *substream)
216 {
217 if (rtd->dai_link->ops &&
218 rtd->dai_link->ops->shutdown)
219 rtd->dai_link->ops->shutdown(substream);
220 }
221
222 static int soc_rtd_prepare(struct snd_soc_pcm_runtime *rtd,
223 struct snd_pcm_substream *substream)
224 {
225 if (rtd->dai_link->ops &&
226 rtd->dai_link->ops->prepare)
227 return rtd->dai_link->ops->prepare(substream);
228 return 0;
229 }
230
231 static int soc_rtd_hw_params(struct snd_soc_pcm_runtime *rtd,
232 struct snd_pcm_substream *substream,
233 struct snd_pcm_hw_params *params)
234 {
235 if (rtd->dai_link->ops &&
236 rtd->dai_link->ops->hw_params)
237 return rtd->dai_link->ops->hw_params(substream, params);
238 return 0;
239 }
240
241 static void soc_rtd_hw_free(struct snd_soc_pcm_runtime *rtd,
242 struct snd_pcm_substream *substream)
243 {
244 if (rtd->dai_link->ops &&
245 rtd->dai_link->ops->hw_free)
246 rtd->dai_link->ops->hw_free(substream);
247 }
248
249 static int soc_rtd_trigger(struct snd_soc_pcm_runtime *rtd,
250 struct snd_pcm_substream *substream,
251 int cmd)
252 {
253 if (rtd->dai_link->ops &&
254 rtd->dai_link->ops->trigger)
255 return rtd->dai_link->ops->trigger(substream, cmd);
256 return 0;
257 }
258
259 static void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd,
260 int stream, int action)
261 {
262 struct snd_soc_dai *dai;
263 int i;
264
265 lockdep_assert_held(&rtd->card->pcm_mutex);
266
267 for_each_rtd_dais(rtd, i, dai) {
268 dai->stream_active[stream] += action;
269 dai->active += action;
270 dai->component->active += action;
271 }
272 }
273
274 /**
275 * snd_soc_runtime_activate() - Increment active count for PCM runtime components
276 * @rtd: ASoC PCM runtime that is activated
277 * @stream: Direction of the PCM stream
278 *
279 * Increments the active count for all the DAIs and components attached to a PCM
280 * runtime. Should typically be called when a stream is opened.
281 *
282 * Must be called with the rtd->card->pcm_mutex being held
283 */
284 void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
285 {
286 snd_soc_runtime_action(rtd, stream, 1);
287 }
288 EXPORT_SYMBOL_GPL(snd_soc_runtime_activate);
289
290 /**
291 * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
292 * @rtd: ASoC PCM runtime that is deactivated
293 * @stream: Direction of the PCM stream
294 *
295 * Decrements the active count for all the DAIs and components attached to a PCM
296 * runtime. Should typically be called when a stream is closed.
297 *
298 * Must be called with the rtd->card->pcm_mutex being held
299 */
300 void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
301 {
302 snd_soc_runtime_action(rtd, stream, -1);
303 }
304 EXPORT_SYMBOL_GPL(snd_soc_runtime_deactivate);
305
306 /**
307 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
308 * @rtd: The ASoC PCM runtime that should be checked.
309 *
310 * This function checks whether the power down delay should be ignored for a
311 * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
312 * been configured to ignore the delay, or if none of the components benefits
313 * from having the delay.
314 */
315 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
316 {
317 struct snd_soc_component *component;
318 bool ignore = true;
319 int i;
320
321 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
322 return true;
323
324 for_each_rtd_components(rtd, i, component)
325 ignore &= !component->driver->use_pmdown_time;
326
327 return ignore;
328 }
329
330 /**
331 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
332 * @substream: the pcm substream
333 * @hw: the hardware parameters
334 *
335 * Sets the substream runtime hardware parameters.
336 */
337 int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
338 const struct snd_pcm_hardware *hw)
339 {
340 struct snd_pcm_runtime *runtime = substream->runtime;
341 runtime->hw.info = hw->info;
342 runtime->hw.formats = hw->formats;
343 runtime->hw.period_bytes_min = hw->period_bytes_min;
344 runtime->hw.period_bytes_max = hw->period_bytes_max;
345 runtime->hw.periods_min = hw->periods_min;
346 runtime->hw.periods_max = hw->periods_max;
347 runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
348 runtime->hw.fifo_size = hw->fifo_size;
349 return 0;
350 }
351 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
352
353 /* DPCM stream event, send event to FE and all active BEs. */
354 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
355 int event)
356 {
357 struct snd_soc_dpcm *dpcm;
358
359 for_each_dpcm_be(fe, dir, dpcm) {
360
361 struct snd_soc_pcm_runtime *be = dpcm->be;
362
363 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
364 be->dai_link->name, event, dir);
365
366 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
367 (be->dpcm[dir].users >= 1))
368 continue;
369
370 snd_soc_dapm_stream_event(be, dir, event);
371 }
372
373 snd_soc_dapm_stream_event(fe, dir, event);
374
375 return 0;
376 }
377
378 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
379 struct snd_soc_dai *soc_dai)
380 {
381 struct snd_soc_pcm_runtime *rtd = substream->private_data;
382 int ret;
383
384 if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
385 rtd->dai_link->symmetric_rates)) {
386 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
387 soc_dai->rate);
388
389 ret = snd_pcm_hw_constraint_single(substream->runtime,
390 SNDRV_PCM_HW_PARAM_RATE,
391 soc_dai->rate);
392 if (ret < 0) {
393 dev_err(soc_dai->dev,
394 "ASoC: Unable to apply rate constraint: %d\n",
395 ret);
396 return ret;
397 }
398 }
399
400 if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
401 rtd->dai_link->symmetric_channels)) {
402 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
403 soc_dai->channels);
404
405 ret = snd_pcm_hw_constraint_single(substream->runtime,
406 SNDRV_PCM_HW_PARAM_CHANNELS,
407 soc_dai->channels);
408 if (ret < 0) {
409 dev_err(soc_dai->dev,
410 "ASoC: Unable to apply channel symmetry constraint: %d\n",
411 ret);
412 return ret;
413 }
414 }
415
416 if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
417 rtd->dai_link->symmetric_samplebits)) {
418 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
419 soc_dai->sample_bits);
420
421 ret = snd_pcm_hw_constraint_single(substream->runtime,
422 SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
423 soc_dai->sample_bits);
424 if (ret < 0) {
425 dev_err(soc_dai->dev,
426 "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
427 ret);
428 return ret;
429 }
430 }
431
432 return 0;
433 }
434
435 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
436 struct snd_pcm_hw_params *params)
437 {
438 struct snd_soc_pcm_runtime *rtd = substream->private_data;
439 struct snd_soc_dai *dai;
440 struct snd_soc_dai *cpu_dai;
441 unsigned int rate, channels, sample_bits, symmetry, i;
442
443 rate = params_rate(params);
444 channels = params_channels(params);
445 sample_bits = snd_pcm_format_physical_width(params_format(params));
446
447 /* reject unmatched parameters when applying symmetry */
448 symmetry = rtd->dai_link->symmetric_rates;
449
450 for_each_rtd_cpu_dais(rtd, i, dai)
451 symmetry |= dai->driver->symmetric_rates;
452
453 if (symmetry) {
454 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
455 if (cpu_dai->rate && cpu_dai->rate != rate) {
456 dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
457 cpu_dai->rate, rate);
458 return -EINVAL;
459 }
460 }
461 }
462
463 symmetry = rtd->dai_link->symmetric_channels;
464
465 for_each_rtd_dais(rtd, i, dai)
466 symmetry |= dai->driver->symmetric_channels;
467
468 if (symmetry) {
469 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
470 if (cpu_dai->channels &&
471 cpu_dai->channels != channels) {
472 dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
473 cpu_dai->channels, channels);
474 return -EINVAL;
475 }
476 }
477 }
478
479 symmetry = rtd->dai_link->symmetric_samplebits;
480
481 for_each_rtd_dais(rtd, i, dai)
482 symmetry |= dai->driver->symmetric_samplebits;
483
484 if (symmetry) {
485 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
486 if (cpu_dai->sample_bits &&
487 cpu_dai->sample_bits != sample_bits) {
488 dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
489 cpu_dai->sample_bits, sample_bits);
490 return -EINVAL;
491 }
492 }
493 }
494
495 return 0;
496 }
497
498 static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
499 {
500 struct snd_soc_pcm_runtime *rtd = substream->private_data;
501 struct snd_soc_dai_link *link = rtd->dai_link;
502 struct snd_soc_dai *dai;
503 unsigned int symmetry, i;
504
505 symmetry = link->symmetric_rates ||
506 link->symmetric_channels ||
507 link->symmetric_samplebits;
508
509 for_each_rtd_dais(rtd, i, dai)
510 symmetry = symmetry ||
511 dai->driver->symmetric_rates ||
512 dai->driver->symmetric_channels ||
513 dai->driver->symmetric_samplebits;
514
515 return symmetry;
516 }
517
518 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
519 {
520 struct snd_soc_pcm_runtime *rtd = substream->private_data;
521 int ret;
522
523 if (!bits)
524 return;
525
526 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
527 if (ret != 0)
528 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
529 bits, ret);
530 }
531
532 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
533 {
534 struct snd_soc_pcm_runtime *rtd = substream->private_data;
535 struct snd_soc_dai *cpu_dai;
536 struct snd_soc_dai *codec_dai;
537 struct snd_soc_pcm_stream *pcm_codec, *pcm_cpu;
538 int stream = substream->stream;
539 int i;
540 unsigned int bits = 0, cpu_bits = 0;
541
542 for_each_rtd_codec_dais(rtd, i, codec_dai) {
543 pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream);
544
545 if (pcm_codec->sig_bits == 0) {
546 bits = 0;
547 break;
548 }
549 bits = max(pcm_codec->sig_bits, bits);
550 }
551
552 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
553 pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
554
555 if (pcm_cpu->sig_bits == 0) {
556 cpu_bits = 0;
557 break;
558 }
559 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits);
560 }
561
562 soc_pcm_set_msb(substream, bits);
563 soc_pcm_set_msb(substream, cpu_bits);
564 }
565
566 /**
567 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream
568 * @rtd: ASoC PCM runtime
569 * @hw: PCM hardware parameters (output)
570 * @stream: Direction of the PCM stream
571 *
572 * Calculates the subset of stream parameters supported by all DAIs
573 * associated with the PCM stream.
574 */
575 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd,
576 struct snd_pcm_hardware *hw, int stream)
577 {
578 struct snd_soc_dai *codec_dai;
579 struct snd_soc_dai *cpu_dai;
580 struct snd_soc_pcm_stream *codec_stream;
581 struct snd_soc_pcm_stream *cpu_stream;
582 unsigned int chan_min = 0, chan_max = UINT_MAX;
583 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX;
584 unsigned int rate_min = 0, rate_max = UINT_MAX;
585 unsigned int cpu_rate_min = 0, cpu_rate_max = UINT_MAX;
586 unsigned int rates = UINT_MAX, cpu_rates = UINT_MAX;
587 u64 formats = ULLONG_MAX;
588 int i;
589
590 /* first calculate min/max only for CPUs in the DAI link */
591 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
592
593 /*
594 * Skip CPUs which don't support the current stream type.
595 * Otherwise, since the rate, channel, and format values will
596 * zero in that case, we would have no usable settings left,
597 * causing the resulting setup to fail.
598 */
599 if (!snd_soc_dai_stream_valid(cpu_dai, stream))
600 continue;
601
602 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
603
604 cpu_chan_min = max(cpu_chan_min, cpu_stream->channels_min);
605 cpu_chan_max = min(cpu_chan_max, cpu_stream->channels_max);
606 cpu_rate_min = max(cpu_rate_min, cpu_stream->rate_min);
607 cpu_rate_max = min_not_zero(cpu_rate_max, cpu_stream->rate_max);
608 formats &= cpu_stream->formats;
609 cpu_rates = snd_pcm_rate_mask_intersect(cpu_stream->rates,
610 cpu_rates);
611 }
612
613 /* second calculate min/max only for CODECs in the DAI link */
614 for_each_rtd_codec_dais(rtd, i, codec_dai) {
615
616 /*
617 * Skip CODECs which don't support the current stream type.
618 * Otherwise, since the rate, channel, and format values will
619 * zero in that case, we would have no usable settings left,
620 * causing the resulting setup to fail.
621 */
622 if (!snd_soc_dai_stream_valid(codec_dai, stream))
623 continue;
624
625 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream);
626
627 chan_min = max(chan_min, codec_stream->channels_min);
628 chan_max = min(chan_max, codec_stream->channels_max);
629 rate_min = max(rate_min, codec_stream->rate_min);
630 rate_max = min_not_zero(rate_max, codec_stream->rate_max);
631 formats &= codec_stream->formats;
632 rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
633 }
634
635 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */
636 if (!chan_min || !cpu_chan_min)
637 return -EINVAL;
638
639 /*
640 * chan min/max cannot be enforced if there are multiple CODEC DAIs
641 * connected to CPU DAI(s), use CPU DAI's directly and let
642 * channel allocation be fixed up later
643 */
644 if (rtd->num_codecs > 1) {
645 chan_min = cpu_chan_min;
646 chan_max = cpu_chan_max;
647 }
648
649 /* finally find a intersection between CODECs and CPUs */
650 hw->channels_min = max(chan_min, cpu_chan_min);
651 hw->channels_max = min(chan_max, cpu_chan_max);
652 hw->formats = formats;
653 hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_rates);
654
655 snd_pcm_hw_limit_rates(hw);
656
657 hw->rate_min = max(hw->rate_min, cpu_rate_min);
658 hw->rate_min = max(hw->rate_min, rate_min);
659 hw->rate_max = min_not_zero(hw->rate_max, cpu_rate_max);
660 hw->rate_max = min_not_zero(hw->rate_max, rate_max);
661
662 return 0;
663 }
664 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw);
665
666 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
667 {
668 struct snd_pcm_hardware *hw = &substream->runtime->hw;
669 struct snd_soc_pcm_runtime *rtd = substream->private_data;
670 u64 formats = hw->formats;
671
672 /*
673 * At least one CPU and one CODEC should match. Otherwise, we should
674 * have bailed out on a higher level, since there would be no CPU or
675 * CODEC to support the transfer direction in that case.
676 */
677 snd_soc_runtime_calc_hw(rtd, hw, substream->stream);
678
679 if (formats)
680 hw->formats &= formats;
681 }
682
683 static int soc_pcm_components_open(struct snd_pcm_substream *substream)
684 {
685 struct snd_soc_pcm_runtime *rtd = substream->private_data;
686 struct snd_soc_component *last = NULL;
687 struct snd_soc_component *component;
688 int i, ret = 0;
689
690 for_each_rtd_components(rtd, i, component) {
691 last = component;
692
693 ret = snd_soc_component_module_get_when_open(component);
694 if (ret < 0) {
695 dev_err(component->dev,
696 "ASoC: can't get module %s\n",
697 component->name);
698 break;
699 }
700
701 ret = snd_soc_component_open(component, substream);
702 if (ret < 0) {
703 snd_soc_component_module_put_when_close(component);
704 dev_err(component->dev,
705 "ASoC: can't open component %s: %d\n",
706 component->name, ret);
707 break;
708 }
709 }
710
711 if (ret < 0) {
712 /* rollback on error */
713 for_each_rtd_components(rtd, i, component) {
714 if (component == last)
715 break;
716
717 snd_soc_component_close(component, substream);
718 snd_soc_component_module_put_when_close(component);
719 }
720 }
721
722 return ret;
723 }
724
725 static int soc_pcm_components_close(struct snd_pcm_substream *substream)
726 {
727 struct snd_soc_pcm_runtime *rtd = substream->private_data;
728 struct snd_soc_component *component;
729 int i, r, ret = 0;
730
731 for_each_rtd_components(rtd, i, component) {
732 r = snd_soc_component_close(component, substream);
733 if (r < 0)
734 ret = r; /* use last ret */
735
736 snd_soc_component_module_put_when_close(component);
737 }
738
739 return ret;
740 }
741
742 /*
743 * Called by ALSA when a PCM substream is closed. Private data can be
744 * freed here. The cpu DAI, codec DAI, machine and components are also
745 * shutdown.
746 */
747 static int soc_pcm_close(struct snd_pcm_substream *substream)
748 {
749 struct snd_soc_pcm_runtime *rtd = substream->private_data;
750 struct snd_soc_component *component;
751 struct snd_soc_dai *dai;
752 int i;
753
754 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
755
756 snd_soc_runtime_deactivate(rtd, substream->stream);
757
758 for_each_rtd_dais(rtd, i, dai)
759 snd_soc_dai_shutdown(dai, substream);
760
761 soc_rtd_shutdown(rtd, substream);
762
763 soc_pcm_components_close(substream);
764
765 snd_soc_dapm_stream_stop(rtd, substream->stream);
766
767 mutex_unlock(&rtd->card->pcm_mutex);
768
769 for_each_rtd_components(rtd, i, component) {
770 pm_runtime_mark_last_busy(component->dev);
771 pm_runtime_put_autosuspend(component->dev);
772 }
773
774 for_each_rtd_components(rtd, i, component)
775 if (!component->active)
776 pinctrl_pm_select_sleep_state(component->dev);
777
778 return 0;
779 }
780
781 /*
782 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
783 * then initialized and any private data can be allocated. This also calls
784 * startup for the cpu DAI, component, machine and codec DAI.
785 */
786 static int soc_pcm_open(struct snd_pcm_substream *substream)
787 {
788 struct snd_soc_pcm_runtime *rtd = substream->private_data;
789 struct snd_pcm_runtime *runtime = substream->runtime;
790 struct snd_soc_component *component;
791 struct snd_soc_dai *dai;
792 const char *codec_dai_name = "multicodec";
793 const char *cpu_dai_name = "multicpu";
794 int i, ret = 0;
795
796 for_each_rtd_components(rtd, i, component)
797 pinctrl_pm_select_default_state(component->dev);
798
799 for_each_rtd_components(rtd, i, component)
800 pm_runtime_get_sync(component->dev);
801
802 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
803
804 ret = soc_pcm_components_open(substream);
805 if (ret < 0)
806 goto component_err;
807
808 ret = soc_rtd_startup(rtd, substream);
809 if (ret < 0) {
810 pr_err("ASoC: %s startup failed: %d\n",
811 rtd->dai_link->name, ret);
812 goto rtd_startup_err;
813 }
814
815 /* startup the audio subsystem */
816 for_each_rtd_dais(rtd, i, dai) {
817 ret = snd_soc_dai_startup(dai, substream);
818 if (ret < 0) {
819 dev_err(dai->dev,
820 "ASoC: can't open DAI %s: %d\n",
821 dai->name, ret);
822 goto config_err;
823 }
824
825 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
826 dai->tx_mask = 0;
827 else
828 dai->rx_mask = 0;
829 }
830
831 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
832 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
833 goto dynamic;
834
835 /* Check that the codec and cpu DAIs are compatible */
836 soc_pcm_init_runtime_hw(substream);
837
838 if (rtd->num_codecs == 1)
839 codec_dai_name = rtd->codec_dai->name;
840
841 if (rtd->num_cpus == 1)
842 cpu_dai_name = rtd->cpu_dai->name;
843
844 if (soc_pcm_has_symmetry(substream))
845 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
846
847 ret = -EINVAL;
848 if (!runtime->hw.rates) {
849 printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
850 codec_dai_name, cpu_dai_name);
851 goto config_err;
852 }
853 if (!runtime->hw.formats) {
854 printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
855 codec_dai_name, cpu_dai_name);
856 goto config_err;
857 }
858 if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
859 runtime->hw.channels_min > runtime->hw.channels_max) {
860 printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
861 codec_dai_name, cpu_dai_name);
862 goto config_err;
863 }
864
865 soc_pcm_apply_msb(substream);
866
867 /* Symmetry only applies if we've already got an active stream. */
868 for_each_rtd_dais(rtd, i, dai) {
869 if (dai->active) {
870 ret = soc_pcm_apply_symmetry(substream, dai);
871 if (ret != 0)
872 goto config_err;
873 }
874 }
875
876 pr_debug("ASoC: %s <-> %s info:\n",
877 codec_dai_name, cpu_dai_name);
878 pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
879 pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
880 runtime->hw.channels_max);
881 pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
882 runtime->hw.rate_max);
883
884 dynamic:
885
886 snd_soc_runtime_activate(rtd, substream->stream);
887
888 mutex_unlock(&rtd->card->pcm_mutex);
889 return 0;
890
891 config_err:
892 for_each_rtd_dais(rtd, i, dai)
893 snd_soc_dai_shutdown(dai, substream);
894
895 soc_rtd_shutdown(rtd, substream);
896 rtd_startup_err:
897 soc_pcm_components_close(substream);
898 component_err:
899 mutex_unlock(&rtd->card->pcm_mutex);
900
901 for_each_rtd_components(rtd, i, component) {
902 pm_runtime_mark_last_busy(component->dev);
903 pm_runtime_put_autosuspend(component->dev);
904 }
905
906 for_each_rtd_components(rtd, i, component)
907 if (!component->active)
908 pinctrl_pm_select_sleep_state(component->dev);
909
910 return ret;
911 }
912
913 static void codec2codec_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
914 {
915 /*
916 * Currently nothing to do for c2c links
917 * Since c2c links are internal nodes in the DAPM graph and
918 * don't interface with the outside world or application layer
919 * we don't have to do any special handling on close.
920 */
921 }
922
923 /*
924 * Called by ALSA when the PCM substream is prepared, can set format, sample
925 * rate, etc. This function is non atomic and can be called multiple times,
926 * it can refer to the runtime info.
927 */
928 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
929 {
930 struct snd_soc_pcm_runtime *rtd = substream->private_data;
931 struct snd_soc_component *component;
932 struct snd_soc_dai *dai;
933 int i, ret = 0;
934
935 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
936
937 ret = soc_rtd_prepare(rtd, substream);
938 if (ret < 0) {
939 dev_err(rtd->card->dev,
940 "ASoC: machine prepare error: %d\n", ret);
941 goto out;
942 }
943
944 for_each_rtd_components(rtd, i, component) {
945 ret = snd_soc_component_prepare(component, substream);
946 if (ret < 0) {
947 dev_err(component->dev,
948 "ASoC: platform prepare error: %d\n", ret);
949 goto out;
950 }
951 }
952
953 for_each_rtd_dais(rtd, i, dai) {
954 ret = snd_soc_dai_prepare(dai, substream);
955 if (ret < 0) {
956 dev_err(dai->dev,
957 "ASoC: DAI prepare error: %d\n", ret);
958 goto out;
959 }
960 }
961
962 /* cancel any delayed stream shutdown that is pending */
963 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
964 rtd->pop_wait) {
965 rtd->pop_wait = 0;
966 cancel_delayed_work(&rtd->delayed_work);
967 }
968
969 snd_soc_dapm_stream_event(rtd, substream->stream,
970 SND_SOC_DAPM_STREAM_START);
971
972 for_each_rtd_dais(rtd, i, dai)
973 snd_soc_dai_digital_mute(dai, 0, substream->stream);
974
975 out:
976 mutex_unlock(&rtd->card->pcm_mutex);
977 return ret;
978 }
979
980 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
981 unsigned int mask)
982 {
983 struct snd_interval *interval;
984 int channels = hweight_long(mask);
985
986 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
987 interval->min = channels;
988 interval->max = channels;
989 }
990
991 static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
992 struct snd_soc_component *last)
993 {
994 struct snd_soc_pcm_runtime *rtd = substream->private_data;
995 struct snd_soc_component *component;
996 int i, r, ret = 0;
997
998 for_each_rtd_components(rtd, i, component) {
999 if (component == last)
1000 break;
1001
1002 r = snd_soc_component_hw_free(component, substream);
1003 if (r < 0)
1004 ret = r; /* use last ret */
1005 }
1006
1007 return ret;
1008 }
1009
1010 /*
1011 * Called by ALSA when the hardware params are set by application. This
1012 * function can also be called multiple times and can allocate buffers
1013 * (using snd_pcm_lib_* ). It's non-atomic.
1014 */
1015 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
1016 struct snd_pcm_hw_params *params)
1017 {
1018 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1019 struct snd_soc_component *component;
1020 struct snd_soc_dai *cpu_dai;
1021 struct snd_soc_dai *codec_dai;
1022 int i, ret = 0;
1023
1024 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
1025
1026 ret = soc_pcm_params_symmetry(substream, params);
1027 if (ret)
1028 goto out;
1029
1030 ret = soc_rtd_hw_params(rtd, substream, params);
1031 if (ret < 0) {
1032 dev_err(rtd->card->dev,
1033 "ASoC: machine hw_params failed: %d\n", ret);
1034 goto out;
1035 }
1036
1037 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1038 struct snd_pcm_hw_params codec_params;
1039
1040 /*
1041 * Skip CODECs which don't support the current stream type,
1042 * the idea being that if a CODEC is not used for the currently
1043 * set up transfer direction, it should not need to be
1044 * configured, especially since the configuration used might
1045 * not even be supported by that CODEC. There may be cases
1046 * however where a CODEC needs to be set up although it is
1047 * actually not being used for the transfer, e.g. if a
1048 * capture-only CODEC is acting as an LRCLK and/or BCLK master
1049 * for the DAI link including a playback-only CODEC.
1050 * If this becomes necessary, we will have to augment the
1051 * machine driver setup with information on how to act, so
1052 * we can do the right thing here.
1053 */
1054 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1055 continue;
1056
1057 /* copy params for each codec */
1058 codec_params = *params;
1059
1060 /* fixup params based on TDM slot masks */
1061 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1062 codec_dai->tx_mask)
1063 soc_pcm_codec_params_fixup(&codec_params,
1064 codec_dai->tx_mask);
1065
1066 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE &&
1067 codec_dai->rx_mask)
1068 soc_pcm_codec_params_fixup(&codec_params,
1069 codec_dai->rx_mask);
1070
1071 ret = snd_soc_dai_hw_params(codec_dai, substream,
1072 &codec_params);
1073 if(ret < 0)
1074 goto codec_err;
1075
1076 codec_dai->rate = params_rate(&codec_params);
1077 codec_dai->channels = params_channels(&codec_params);
1078 codec_dai->sample_bits = snd_pcm_format_physical_width(
1079 params_format(&codec_params));
1080
1081 snd_soc_dapm_update_dai(substream, &codec_params, codec_dai);
1082 }
1083
1084 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1085 /*
1086 * Skip CPUs which don't support the current stream
1087 * type. See soc_pcm_init_runtime_hw() for more details
1088 */
1089 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
1090 continue;
1091
1092 ret = snd_soc_dai_hw_params(cpu_dai, substream, params);
1093 if (ret < 0)
1094 goto interface_err;
1095
1096 /* store the parameters for each DAI */
1097 cpu_dai->rate = params_rate(params);
1098 cpu_dai->channels = params_channels(params);
1099 cpu_dai->sample_bits =
1100 snd_pcm_format_physical_width(params_format(params));
1101
1102 snd_soc_dapm_update_dai(substream, params, cpu_dai);
1103 }
1104
1105 for_each_rtd_components(rtd, i, component) {
1106 ret = snd_soc_component_hw_params(component, substream, params);
1107 if (ret < 0) {
1108 dev_err(component->dev,
1109 "ASoC: %s hw params failed: %d\n",
1110 component->name, ret);
1111 goto component_err;
1112 }
1113 }
1114 component = NULL;
1115
1116 out:
1117 mutex_unlock(&rtd->card->pcm_mutex);
1118 return ret;
1119
1120 component_err:
1121 soc_pcm_components_hw_free(substream, component);
1122
1123 i = rtd->num_cpus;
1124
1125 interface_err:
1126 for_each_rtd_cpu_dais_rollback(rtd, i, cpu_dai) {
1127 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
1128 continue;
1129
1130 snd_soc_dai_hw_free(cpu_dai, substream);
1131 cpu_dai->rate = 0;
1132 }
1133
1134 i = rtd->num_codecs;
1135
1136 codec_err:
1137 for_each_rtd_codec_dais_rollback(rtd, i, codec_dai) {
1138 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1139 continue;
1140
1141 snd_soc_dai_hw_free(codec_dai, substream);
1142 codec_dai->rate = 0;
1143 }
1144
1145 soc_rtd_hw_free(rtd, substream);
1146
1147 mutex_unlock(&rtd->card->pcm_mutex);
1148 return ret;
1149 }
1150
1151 /*
1152 * Frees resources allocated by hw_params, can be called multiple times
1153 */
1154 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
1155 {
1156 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1157 struct snd_soc_dai *dai;
1158 int i;
1159
1160 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
1161
1162 /* clear the corresponding DAIs parameters when going to be inactive */
1163 for_each_rtd_dais(rtd, i, dai) {
1164 int active = dai->stream_active[substream->stream];
1165
1166 if (dai->active == 1) {
1167 dai->rate = 0;
1168 dai->channels = 0;
1169 dai->sample_bits = 0;
1170 }
1171
1172 if (active == 1)
1173 snd_soc_dai_digital_mute(dai, 1, substream->stream);
1174 }
1175
1176 /* free any machine hw params */
1177 soc_rtd_hw_free(rtd, substream);
1178
1179 /* free any component resources */
1180 soc_pcm_components_hw_free(substream, NULL);
1181
1182 /* now free hw params for the DAIs */
1183 for_each_rtd_dais(rtd, i, dai) {
1184 if (!snd_soc_dai_stream_valid(dai, substream->stream))
1185 continue;
1186
1187 snd_soc_dai_hw_free(dai, substream);
1188 }
1189
1190 mutex_unlock(&rtd->card->pcm_mutex);
1191 return 0;
1192 }
1193
1194 static int soc_pcm_trigger_start(struct snd_pcm_substream *substream, int cmd)
1195 {
1196 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1197 struct snd_soc_component *component;
1198 struct snd_soc_dai *dai;
1199 int i, ret;
1200
1201 ret = soc_rtd_trigger(rtd, substream, cmd);
1202 if (ret < 0)
1203 return ret;
1204
1205 for_each_rtd_components(rtd, i, component) {
1206 ret = snd_soc_component_trigger(component, substream, cmd);
1207 if (ret < 0)
1208 return ret;
1209 }
1210
1211 for_each_rtd_dais(rtd, i, dai) {
1212 ret = snd_soc_dai_trigger(dai, substream, cmd);
1213 if (ret < 0)
1214 return ret;
1215 }
1216
1217 return 0;
1218 }
1219
1220 static int soc_pcm_trigger_stop(struct snd_pcm_substream *substream, int cmd)
1221 {
1222 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1223 struct snd_soc_component *component;
1224 struct snd_soc_dai *dai;
1225 int i, ret;
1226
1227 for_each_rtd_dais(rtd, i, dai) {
1228 ret = snd_soc_dai_trigger(dai, substream, cmd);
1229 if (ret < 0)
1230 return ret;
1231 }
1232
1233 for_each_rtd_components(rtd, i, component) {
1234 ret = snd_soc_component_trigger(component, substream, cmd);
1235 if (ret < 0)
1236 return ret;
1237 }
1238
1239 ret = soc_rtd_trigger(rtd, substream, cmd);
1240 if (ret < 0)
1241 return ret;
1242
1243 return 0;
1244 }
1245
1246 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1247 {
1248 int ret;
1249
1250 switch (cmd) {
1251 case SNDRV_PCM_TRIGGER_START:
1252 case SNDRV_PCM_TRIGGER_RESUME:
1253 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1254 ret = soc_pcm_trigger_start(substream, cmd);
1255 break;
1256 case SNDRV_PCM_TRIGGER_STOP:
1257 case SNDRV_PCM_TRIGGER_SUSPEND:
1258 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1259 ret = soc_pcm_trigger_stop(substream, cmd);
1260 break;
1261 default:
1262 return -EINVAL;
1263 }
1264
1265 return ret;
1266 }
1267
1268 static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream,
1269 int cmd)
1270 {
1271 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1272 struct snd_soc_dai *dai;
1273 int i, ret;
1274
1275 for_each_rtd_dais(rtd, i, dai) {
1276 ret = snd_soc_dai_bespoke_trigger(dai, substream, cmd);
1277 if (ret < 0)
1278 return ret;
1279 }
1280
1281 return 0;
1282 }
1283 /*
1284 * soc level wrapper for pointer callback
1285 * If cpu_dai, codec_dai, component driver has the delay callback, then
1286 * the runtime->delay will be updated accordingly.
1287 */
1288 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1289 {
1290 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1291 struct snd_soc_dai *cpu_dai;
1292 struct snd_soc_dai *codec_dai;
1293 struct snd_pcm_runtime *runtime = substream->runtime;
1294 snd_pcm_uframes_t offset = 0;
1295 snd_pcm_sframes_t delay = 0;
1296 snd_pcm_sframes_t codec_delay = 0;
1297 snd_pcm_sframes_t cpu_delay = 0;
1298 int i;
1299
1300 /* clearing the previous total delay */
1301 runtime->delay = 0;
1302
1303 offset = snd_soc_pcm_component_pointer(substream);
1304
1305 /* base delay if assigned in pointer callback */
1306 delay = runtime->delay;
1307
1308 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1309 cpu_delay = max(cpu_delay,
1310 snd_soc_dai_delay(cpu_dai, substream));
1311 }
1312 delay += cpu_delay;
1313
1314 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1315 codec_delay = max(codec_delay,
1316 snd_soc_dai_delay(codec_dai, substream));
1317 }
1318 delay += codec_delay;
1319
1320 runtime->delay = delay;
1321
1322 return offset;
1323 }
1324
1325 /* connect a FE and BE */
1326 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1327 struct snd_soc_pcm_runtime *be, int stream)
1328 {
1329 struct snd_soc_dpcm *dpcm;
1330 unsigned long flags;
1331
1332 /* only add new dpcms */
1333 for_each_dpcm_be(fe, stream, dpcm) {
1334 if (dpcm->be == be && dpcm->fe == fe)
1335 return 0;
1336 }
1337
1338 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1339 if (!dpcm)
1340 return -ENOMEM;
1341
1342 dpcm->be = be;
1343 dpcm->fe = fe;
1344 be->dpcm[stream].runtime = fe->dpcm[stream].runtime;
1345 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1346 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1347 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1348 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1349 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1350
1351 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1352 stream ? "capture" : "playback", fe->dai_link->name,
1353 stream ? "<-" : "->", be->dai_link->name);
1354
1355 dpcm_create_debugfs_state(dpcm, stream);
1356
1357 return 1;
1358 }
1359
1360 /* reparent a BE onto another FE */
1361 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1362 struct snd_soc_pcm_runtime *be, int stream)
1363 {
1364 struct snd_soc_dpcm *dpcm;
1365 struct snd_pcm_substream *fe_substream, *be_substream;
1366
1367 /* reparent if BE is connected to other FEs */
1368 if (!be->dpcm[stream].users)
1369 return;
1370
1371 be_substream = snd_soc_dpcm_get_substream(be, stream);
1372
1373 for_each_dpcm_fe(be, stream, dpcm) {
1374 if (dpcm->fe == fe)
1375 continue;
1376
1377 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1378 stream ? "capture" : "playback",
1379 dpcm->fe->dai_link->name,
1380 stream ? "<-" : "->", dpcm->be->dai_link->name);
1381
1382 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1383 be_substream->runtime = fe_substream->runtime;
1384 break;
1385 }
1386 }
1387
1388 /* disconnect a BE and FE */
1389 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1390 {
1391 struct snd_soc_dpcm *dpcm, *d;
1392 unsigned long flags;
1393
1394 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1395 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1396 stream ? "capture" : "playback",
1397 dpcm->be->dai_link->name);
1398
1399 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1400 continue;
1401
1402 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1403 stream ? "capture" : "playback", fe->dai_link->name,
1404 stream ? "<-" : "->", dpcm->be->dai_link->name);
1405
1406 /* BEs still alive need new FE */
1407 dpcm_be_reparent(fe, dpcm->be, stream);
1408
1409 dpcm_remove_debugfs_state(dpcm);
1410
1411 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1412 list_del(&dpcm->list_be);
1413 list_del(&dpcm->list_fe);
1414 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1415 kfree(dpcm);
1416 }
1417 }
1418
1419 /* get BE for DAI widget and stream */
1420 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1421 struct snd_soc_dapm_widget *widget, int stream)
1422 {
1423 struct snd_soc_pcm_runtime *be;
1424 struct snd_soc_dapm_widget *w;
1425 struct snd_soc_dai *dai;
1426 int i;
1427
1428 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1429
1430 for_each_card_rtds(card, be) {
1431
1432 if (!be->dai_link->no_pcm)
1433 continue;
1434
1435 for_each_rtd_dais(be, i, dai) {
1436 w = snd_soc_dai_get_widget(dai, stream);
1437
1438 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1439 w ? w->name : "(not set)");
1440
1441 if (w == widget)
1442 return be;
1443 }
1444 }
1445
1446 /* Widget provided is not a BE */
1447 return NULL;
1448 }
1449
1450 static int widget_in_list(struct snd_soc_dapm_widget_list *list,
1451 struct snd_soc_dapm_widget *widget)
1452 {
1453 struct snd_soc_dapm_widget *w;
1454 int i;
1455
1456 for_each_dapm_widgets(list, i, w)
1457 if (widget == w)
1458 return 1;
1459
1460 return 0;
1461 }
1462
1463 static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
1464 enum snd_soc_dapm_direction dir)
1465 {
1466 struct snd_soc_card *card = widget->dapm->card;
1467 struct snd_soc_pcm_runtime *rtd;
1468 int stream;
1469
1470 /* adjust dir to stream */
1471 if (dir == SND_SOC_DAPM_DIR_OUT)
1472 stream = SNDRV_PCM_STREAM_PLAYBACK;
1473 else
1474 stream = SNDRV_PCM_STREAM_CAPTURE;
1475
1476 rtd = dpcm_get_be(card, widget, stream);
1477 if (rtd)
1478 return true;
1479
1480 return false;
1481 }
1482
1483 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1484 int stream, struct snd_soc_dapm_widget_list **list)
1485 {
1486 struct snd_soc_dai *cpu_dai = fe->cpu_dai;
1487 int paths;
1488
1489 if (fe->num_cpus > 1) {
1490 dev_err(fe->dev,
1491 "%s doesn't support Multi CPU yet\n", __func__);
1492 return -EINVAL;
1493 }
1494
1495 /* get number of valid DAI paths and their widgets */
1496 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1497 dpcm_end_walk_at_be);
1498
1499 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1500 stream ? "capture" : "playback");
1501
1502 return paths;
1503 }
1504
1505 void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
1506 {
1507 snd_soc_dapm_dai_free_widgets(list);
1508 }
1509
1510 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream,
1511 struct snd_soc_dapm_widget_list *list)
1512 {
1513 struct snd_soc_dapm_widget *widget;
1514 struct snd_soc_dai *dai;
1515 unsigned int i;
1516
1517 /* is there a valid DAI widget for this BE */
1518 for_each_rtd_dais(dpcm->be, i, dai) {
1519 widget = snd_soc_dai_get_widget(dai, stream);
1520
1521 /*
1522 * The BE is pruned only if none of the dai
1523 * widgets are in the active list.
1524 */
1525 if (widget && widget_in_list(list, widget))
1526 return true;
1527 }
1528
1529 return false;
1530 }
1531
1532 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1533 struct snd_soc_dapm_widget_list **list_)
1534 {
1535 struct snd_soc_dpcm *dpcm;
1536 int prune = 0;
1537
1538 /* Destroy any old FE <--> BE connections */
1539 for_each_dpcm_be(fe, stream, dpcm) {
1540 if (dpcm_be_is_active(dpcm, stream, *list_))
1541 continue;
1542
1543 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1544 stream ? "capture" : "playback",
1545 dpcm->be->dai_link->name, fe->dai_link->name);
1546 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1547 dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1548 prune++;
1549 }
1550
1551 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1552 return prune;
1553 }
1554
1555 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1556 struct snd_soc_dapm_widget_list **list_)
1557 {
1558 struct snd_soc_card *card = fe->card;
1559 struct snd_soc_dapm_widget_list *list = *list_;
1560 struct snd_soc_pcm_runtime *be;
1561 struct snd_soc_dapm_widget *widget;
1562 int i, new = 0, err;
1563
1564 /* Create any new FE <--> BE connections */
1565 for_each_dapm_widgets(list, i, widget) {
1566
1567 switch (widget->id) {
1568 case snd_soc_dapm_dai_in:
1569 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1570 continue;
1571 break;
1572 case snd_soc_dapm_dai_out:
1573 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1574 continue;
1575 break;
1576 default:
1577 continue;
1578 }
1579
1580 /* is there a valid BE rtd for this widget */
1581 be = dpcm_get_be(card, widget, stream);
1582 if (!be) {
1583 dev_err(fe->dev, "ASoC: no BE found for %s\n",
1584 widget->name);
1585 continue;
1586 }
1587
1588 /* don't connect if FE is not running */
1589 if (!fe->dpcm[stream].runtime && !fe->fe_compr)
1590 continue;
1591
1592 /* newly connected FE and BE */
1593 err = dpcm_be_connect(fe, be, stream);
1594 if (err < 0) {
1595 dev_err(fe->dev, "ASoC: can't connect %s\n",
1596 widget->name);
1597 break;
1598 } else if (err == 0) /* already connected */
1599 continue;
1600
1601 /* new */
1602 be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
1603 new++;
1604 }
1605
1606 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1607 return new;
1608 }
1609
1610 /*
1611 * Find the corresponding BE DAIs that source or sink audio to this
1612 * FE substream.
1613 */
1614 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1615 int stream, struct snd_soc_dapm_widget_list **list, int new)
1616 {
1617 if (new)
1618 return dpcm_add_paths(fe, stream, list);
1619 else
1620 return dpcm_prune_paths(fe, stream, list);
1621 }
1622
1623 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1624 {
1625 struct snd_soc_dpcm *dpcm;
1626 unsigned long flags;
1627
1628 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
1629 for_each_dpcm_be(fe, stream, dpcm)
1630 dpcm->be->dpcm[stream].runtime_update =
1631 SND_SOC_DPCM_UPDATE_NO;
1632 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
1633 }
1634
1635 static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
1636 int stream)
1637 {
1638 struct snd_soc_dpcm *dpcm;
1639
1640 /* disable any enabled and non active backends */
1641 for_each_dpcm_be(fe, stream, dpcm) {
1642
1643 struct snd_soc_pcm_runtime *be = dpcm->be;
1644 struct snd_pcm_substream *be_substream =
1645 snd_soc_dpcm_get_substream(be, stream);
1646
1647 if (be->dpcm[stream].users == 0)
1648 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1649 stream ? "capture" : "playback",
1650 be->dpcm[stream].state);
1651
1652 if (--be->dpcm[stream].users != 0)
1653 continue;
1654
1655 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1656 continue;
1657
1658 soc_pcm_close(be_substream);
1659 be_substream->runtime = NULL;
1660 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1661 }
1662 }
1663
1664 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1665 {
1666 struct snd_soc_dpcm *dpcm;
1667 int err, count = 0;
1668
1669 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1670 for_each_dpcm_be(fe, stream, dpcm) {
1671
1672 struct snd_soc_pcm_runtime *be = dpcm->be;
1673 struct snd_pcm_substream *be_substream =
1674 snd_soc_dpcm_get_substream(be, stream);
1675
1676 if (!be_substream) {
1677 dev_err(be->dev, "ASoC: no backend %s stream\n",
1678 stream ? "capture" : "playback");
1679 continue;
1680 }
1681
1682 /* is this op for this BE ? */
1683 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1684 continue;
1685
1686 /* first time the dpcm is open ? */
1687 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
1688 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1689 stream ? "capture" : "playback",
1690 be->dpcm[stream].state);
1691
1692 if (be->dpcm[stream].users++ != 0)
1693 continue;
1694
1695 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1696 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1697 continue;
1698
1699 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1700 stream ? "capture" : "playback", be->dai_link->name);
1701
1702 be_substream->runtime = be->dpcm[stream].runtime;
1703 err = soc_pcm_open(be_substream);
1704 if (err < 0) {
1705 dev_err(be->dev, "ASoC: BE open failed %d\n", err);
1706 be->dpcm[stream].users--;
1707 if (be->dpcm[stream].users < 0)
1708 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1709 stream ? "capture" : "playback",
1710 be->dpcm[stream].state);
1711
1712 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1713 goto unwind;
1714 }
1715
1716 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1717 count++;
1718 }
1719
1720 return count;
1721
1722 unwind:
1723 /* disable any enabled and non active backends */
1724 for_each_dpcm_be_rollback(fe, stream, dpcm) {
1725 struct snd_soc_pcm_runtime *be = dpcm->be;
1726 struct snd_pcm_substream *be_substream =
1727 snd_soc_dpcm_get_substream(be, stream);
1728
1729 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1730 continue;
1731
1732 if (be->dpcm[stream].users == 0)
1733 dev_err(be->dev, "ASoC: no users %s at close %d\n",
1734 stream ? "capture" : "playback",
1735 be->dpcm[stream].state);
1736
1737 if (--be->dpcm[stream].users != 0)
1738 continue;
1739
1740 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
1741 continue;
1742
1743 soc_pcm_close(be_substream);
1744 be_substream->runtime = NULL;
1745 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1746 }
1747
1748 return err;
1749 }
1750
1751 static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
1752 struct snd_soc_pcm_stream *stream)
1753 {
1754 runtime->hw.rate_min = stream->rate_min;
1755 runtime->hw.rate_max = min_not_zero(stream->rate_max, UINT_MAX);
1756 runtime->hw.channels_min = stream->channels_min;
1757 runtime->hw.channels_max = stream->channels_max;
1758 if (runtime->hw.formats)
1759 runtime->hw.formats &= stream->formats;
1760 else
1761 runtime->hw.formats = stream->formats;
1762 runtime->hw.rates = stream->rates;
1763 }
1764
1765 static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
1766 u64 *formats)
1767 {
1768 struct snd_soc_pcm_runtime *fe = substream->private_data;
1769 struct snd_soc_dpcm *dpcm;
1770 struct snd_soc_dai *dai;
1771 int stream = substream->stream;
1772
1773 if (!fe->dai_link->dpcm_merged_format)
1774 return;
1775
1776 /*
1777 * It returns merged BE codec format
1778 * if FE want to use it (= dpcm_merged_format)
1779 */
1780
1781 for_each_dpcm_be(fe, stream, dpcm) {
1782 struct snd_soc_pcm_runtime *be = dpcm->be;
1783 struct snd_soc_pcm_stream *codec_stream;
1784 int i;
1785
1786 for_each_rtd_codec_dais(be, i, dai) {
1787 /*
1788 * Skip CODECs which don't support the current stream
1789 * type. See soc_pcm_init_runtime_hw() for more details
1790 */
1791 if (!snd_soc_dai_stream_valid(dai, stream))
1792 continue;
1793
1794 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1795
1796 *formats &= codec_stream->formats;
1797 }
1798 }
1799 }
1800
1801 static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
1802 unsigned int *channels_min,
1803 unsigned int *channels_max)
1804 {
1805 struct snd_soc_pcm_runtime *fe = substream->private_data;
1806 struct snd_soc_dpcm *dpcm;
1807 int stream = substream->stream;
1808
1809 if (!fe->dai_link->dpcm_merged_chan)
1810 return;
1811
1812 /*
1813 * It returns merged BE codec channel;
1814 * if FE want to use it (= dpcm_merged_chan)
1815 */
1816
1817 for_each_dpcm_be(fe, stream, dpcm) {
1818 struct snd_soc_pcm_runtime *be = dpcm->be;
1819 struct snd_soc_pcm_stream *codec_stream;
1820 struct snd_soc_pcm_stream *cpu_stream;
1821 struct snd_soc_dai *dai;
1822 int i;
1823
1824 for_each_rtd_cpu_dais(be, i, dai) {
1825 /*
1826 * Skip CPUs which don't support the current stream
1827 * type. See soc_pcm_init_runtime_hw() for more details
1828 */
1829 if (!snd_soc_dai_stream_valid(dai, stream))
1830 continue;
1831
1832 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1833
1834 *channels_min = max(*channels_min,
1835 cpu_stream->channels_min);
1836 *channels_max = min(*channels_max,
1837 cpu_stream->channels_max);
1838 }
1839
1840 /*
1841 * chan min/max cannot be enforced if there are multiple CODEC
1842 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1843 */
1844 if (be->num_codecs == 1) {
1845 codec_stream = snd_soc_dai_get_pcm_stream(be->codec_dais[0], stream);
1846
1847 *channels_min = max(*channels_min,
1848 codec_stream->channels_min);
1849 *channels_max = min(*channels_max,
1850 codec_stream->channels_max);
1851 }
1852 }
1853 }
1854
1855 static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
1856 unsigned int *rates,
1857 unsigned int *rate_min,
1858 unsigned int *rate_max)
1859 {
1860 struct snd_soc_pcm_runtime *fe = substream->private_data;
1861 struct snd_soc_dpcm *dpcm;
1862 int stream = substream->stream;
1863
1864 if (!fe->dai_link->dpcm_merged_rate)
1865 return;
1866
1867 /*
1868 * It returns merged BE codec channel;
1869 * if FE want to use it (= dpcm_merged_chan)
1870 */
1871
1872 for_each_dpcm_be(fe, stream, dpcm) {
1873 struct snd_soc_pcm_runtime *be = dpcm->be;
1874 struct snd_soc_pcm_stream *pcm;
1875 struct snd_soc_dai *dai;
1876 int i;
1877
1878 for_each_rtd_dais(be, i, dai) {
1879 /*
1880 * Skip DAIs which don't support the current stream
1881 * type. See soc_pcm_init_runtime_hw() for more details
1882 */
1883 if (!snd_soc_dai_stream_valid(dai, stream))
1884 continue;
1885
1886 pcm = snd_soc_dai_get_pcm_stream(dai, stream);
1887
1888 *rate_min = max(*rate_min, pcm->rate_min);
1889 *rate_max = min_not_zero(*rate_max, pcm->rate_max);
1890 *rates = snd_pcm_rate_mask_intersect(*rates, pcm->rates);
1891 }
1892 }
1893 }
1894
1895 static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
1896 {
1897 struct snd_pcm_runtime *runtime = substream->runtime;
1898 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1899 struct snd_soc_dai *cpu_dai;
1900 int i;
1901
1902 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1903 /*
1904 * Skip CPUs which don't support the current stream
1905 * type. See soc_pcm_init_runtime_hw() for more details
1906 */
1907 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
1908 continue;
1909
1910 dpcm_init_runtime_hw(runtime,
1911 snd_soc_dai_get_pcm_stream(cpu_dai,
1912 substream->stream));
1913 }
1914
1915 dpcm_runtime_merge_format(substream, &runtime->hw.formats);
1916 dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
1917 &runtime->hw.channels_max);
1918 dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
1919 &runtime->hw.rate_min, &runtime->hw.rate_max);
1920 }
1921
1922 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
1923
1924 /* Set FE's runtime_update state; the state is protected via PCM stream lock
1925 * for avoiding the race with trigger callback.
1926 * If the state is unset and a trigger is pending while the previous operation,
1927 * process the pending trigger action here.
1928 */
1929 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
1930 int stream, enum snd_soc_dpcm_update state)
1931 {
1932 struct snd_pcm_substream *substream =
1933 snd_soc_dpcm_get_substream(fe, stream);
1934
1935 snd_pcm_stream_lock_irq(substream);
1936 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
1937 dpcm_fe_dai_do_trigger(substream,
1938 fe->dpcm[stream].trigger_pending - 1);
1939 fe->dpcm[stream].trigger_pending = 0;
1940 }
1941 fe->dpcm[stream].runtime_update = state;
1942 snd_pcm_stream_unlock_irq(substream);
1943 }
1944
1945 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1946 int stream)
1947 {
1948 struct snd_soc_dpcm *dpcm;
1949 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
1950 struct snd_soc_dai *fe_cpu_dai;
1951 int err;
1952 int i;
1953
1954 /* apply symmetry for FE */
1955 if (soc_pcm_has_symmetry(fe_substream))
1956 fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1957
1958 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) {
1959 /* Symmetry only applies if we've got an active stream. */
1960 if (fe_cpu_dai->active) {
1961 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1962 if (err < 0)
1963 return err;
1964 }
1965 }
1966
1967 /* apply symmetry for BE */
1968 for_each_dpcm_be(fe, stream, dpcm) {
1969 struct snd_soc_pcm_runtime *be = dpcm->be;
1970 struct snd_pcm_substream *be_substream =
1971 snd_soc_dpcm_get_substream(be, stream);
1972 struct snd_soc_pcm_runtime *rtd;
1973 struct snd_soc_dai *dai;
1974 int i;
1975
1976 /* A backend may not have the requested substream */
1977 if (!be_substream)
1978 continue;
1979
1980 rtd = be_substream->private_data;
1981 if (rtd->dai_link->be_hw_params_fixup)
1982 continue;
1983
1984 if (soc_pcm_has_symmetry(be_substream))
1985 be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
1986
1987 /* Symmetry only applies if we've got an active stream. */
1988 for_each_rtd_dais(rtd, i, dai) {
1989 if (dai->active) {
1990 err = soc_pcm_apply_symmetry(fe_substream, dai);
1991 if (err < 0)
1992 return err;
1993 }
1994 }
1995 }
1996
1997 return 0;
1998 }
1999
2000 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
2001 {
2002 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2003 struct snd_pcm_runtime *runtime = fe_substream->runtime;
2004 int stream = fe_substream->stream, ret = 0;
2005
2006 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2007
2008 ret = dpcm_be_dai_startup(fe, stream);
2009 if (ret < 0) {
2010 dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
2011 goto be_err;
2012 }
2013
2014 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
2015
2016 /* start the DAI frontend */
2017 ret = soc_pcm_open(fe_substream);
2018 if (ret < 0) {
2019 dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
2020 goto unwind;
2021 }
2022
2023 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
2024
2025 dpcm_set_fe_runtime(fe_substream);
2026 snd_pcm_limit_hw_rates(runtime);
2027
2028 ret = dpcm_apply_symmetry(fe_substream, stream);
2029 if (ret < 0)
2030 dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
2031 ret);
2032
2033 unwind:
2034 if (ret < 0)
2035 dpcm_be_dai_startup_unwind(fe, stream);
2036 be_err:
2037 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2038 return ret;
2039 }
2040
2041 int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2042 {
2043 struct snd_soc_dpcm *dpcm;
2044
2045 /* only shutdown BEs that are either sinks or sources to this FE DAI */
2046 for_each_dpcm_be(fe, stream, dpcm) {
2047
2048 struct snd_soc_pcm_runtime *be = dpcm->be;
2049 struct snd_pcm_substream *be_substream =
2050 snd_soc_dpcm_get_substream(be, stream);
2051
2052 /* is this op for this BE ? */
2053 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2054 continue;
2055
2056 if (be->dpcm[stream].users == 0)
2057 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
2058 stream ? "capture" : "playback",
2059 be->dpcm[stream].state);
2060
2061 if (--be->dpcm[stream].users != 0)
2062 continue;
2063
2064 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2065 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
2066 soc_pcm_hw_free(be_substream);
2067 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2068 }
2069
2070 dev_dbg(be->dev, "ASoC: close BE %s\n",
2071 be->dai_link->name);
2072
2073 soc_pcm_close(be_substream);
2074 be_substream->runtime = NULL;
2075
2076 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2077 }
2078 return 0;
2079 }
2080
2081 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2082 {
2083 struct snd_soc_pcm_runtime *fe = substream->private_data;
2084 int stream = substream->stream;
2085
2086 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2087
2088 /* shutdown the BEs */
2089 dpcm_be_dai_shutdown(fe, stream);
2090
2091 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2092
2093 /* now shutdown the frontend */
2094 soc_pcm_close(substream);
2095
2096 /* run the stream event for each BE */
2097 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2098
2099 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2100 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2101 return 0;
2102 }
2103
2104 int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2105 {
2106 struct snd_soc_dpcm *dpcm;
2107
2108 /* only hw_params backends that are either sinks or sources
2109 * to this frontend DAI */
2110 for_each_dpcm_be(fe, stream, dpcm) {
2111
2112 struct snd_soc_pcm_runtime *be = dpcm->be;
2113 struct snd_pcm_substream *be_substream =
2114 snd_soc_dpcm_get_substream(be, stream);
2115
2116 /* is this op for this BE ? */
2117 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2118 continue;
2119
2120 /* only free hw when no longer used - check all FEs */
2121 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2122 continue;
2123
2124 /* do not free hw if this BE is used by other FE */
2125 if (be->dpcm[stream].users > 1)
2126 continue;
2127
2128 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2129 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2130 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2131 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2132 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2133 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2134 continue;
2135
2136 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2137 be->dai_link->name);
2138
2139 soc_pcm_hw_free(be_substream);
2140
2141 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2142 }
2143
2144 return 0;
2145 }
2146
2147 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2148 {
2149 struct snd_soc_pcm_runtime *fe = substream->private_data;
2150 int err, stream = substream->stream;
2151
2152 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2153 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2154
2155 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2156
2157 /* call hw_free on the frontend */
2158 err = soc_pcm_hw_free(substream);
2159 if (err < 0)
2160 dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
2161 fe->dai_link->name);
2162
2163 /* only hw_params backends that are either sinks or sources
2164 * to this frontend DAI */
2165 err = dpcm_be_dai_hw_free(fe, stream);
2166
2167 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2168 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2169
2170 mutex_unlock(&fe->card->mutex);
2171 return 0;
2172 }
2173
2174 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2175 {
2176 struct snd_soc_dpcm *dpcm;
2177 int ret;
2178
2179 for_each_dpcm_be(fe, stream, dpcm) {
2180
2181 struct snd_soc_pcm_runtime *be = dpcm->be;
2182 struct snd_pcm_substream *be_substream =
2183 snd_soc_dpcm_get_substream(be, stream);
2184
2185 /* is this op for this BE ? */
2186 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2187 continue;
2188
2189 /* copy params for each dpcm */
2190 memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
2191 sizeof(struct snd_pcm_hw_params));
2192
2193 /* perform any hw_params fixups */
2194 if (be->dai_link->be_hw_params_fixup) {
2195 ret = be->dai_link->be_hw_params_fixup(be,
2196 &dpcm->hw_params);
2197 if (ret < 0) {
2198 dev_err(be->dev,
2199 "ASoC: hw_params BE fixup failed %d\n",
2200 ret);
2201 goto unwind;
2202 }
2203 }
2204
2205 /* copy the fixed-up hw params for BE dai */
2206 memcpy(&be->dpcm[stream].hw_params, &dpcm->hw_params,
2207 sizeof(struct snd_pcm_hw_params));
2208
2209 /* only allow hw_params() if no connected FEs are running */
2210 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2211 continue;
2212
2213 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2214 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2215 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2216 continue;
2217
2218 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2219 be->dai_link->name);
2220
2221 ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
2222 if (ret < 0) {
2223 dev_err(dpcm->be->dev,
2224 "ASoC: hw_params BE failed %d\n", ret);
2225 goto unwind;
2226 }
2227
2228 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2229 }
2230 return 0;
2231
2232 unwind:
2233 /* disable any enabled and non active backends */
2234 for_each_dpcm_be_rollback(fe, stream, dpcm) {
2235 struct snd_soc_pcm_runtime *be = dpcm->be;
2236 struct snd_pcm_substream *be_substream =
2237 snd_soc_dpcm_get_substream(be, stream);
2238
2239 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2240 continue;
2241
2242 /* only allow hw_free() if no connected FEs are running */
2243 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2244 continue;
2245
2246 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2247 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2248 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2249 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2250 continue;
2251
2252 soc_pcm_hw_free(be_substream);
2253 }
2254
2255 return ret;
2256 }
2257
2258 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2259 struct snd_pcm_hw_params *params)
2260 {
2261 struct snd_soc_pcm_runtime *fe = substream->private_data;
2262 int ret, stream = substream->stream;
2263
2264 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2265 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2266
2267 memcpy(&fe->dpcm[stream].hw_params, params,
2268 sizeof(struct snd_pcm_hw_params));
2269 ret = dpcm_be_dai_hw_params(fe, stream);
2270 if (ret < 0) {
2271 dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
2272 goto out;
2273 }
2274
2275 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2276 fe->dai_link->name, params_rate(params),
2277 params_channels(params), params_format(params));
2278
2279 /* call hw_params on the frontend */
2280 ret = soc_pcm_hw_params(substream, params);
2281 if (ret < 0) {
2282 dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
2283 dpcm_be_dai_hw_free(fe, stream);
2284 } else
2285 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2286
2287 out:
2288 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2289 mutex_unlock(&fe->card->mutex);
2290 return ret;
2291 }
2292
2293 static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
2294 struct snd_pcm_substream *substream, int cmd)
2295 {
2296 int ret;
2297
2298 dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
2299 dpcm->be->dai_link->name, cmd);
2300
2301 ret = soc_pcm_trigger(substream, cmd);
2302 if (ret < 0)
2303 dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
2304
2305 return ret;
2306 }
2307
2308 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2309 int cmd)
2310 {
2311 struct snd_soc_dpcm *dpcm;
2312 int ret = 0;
2313
2314 for_each_dpcm_be(fe, stream, dpcm) {
2315
2316 struct snd_soc_pcm_runtime *be = dpcm->be;
2317 struct snd_pcm_substream *be_substream =
2318 snd_soc_dpcm_get_substream(be, stream);
2319
2320 /* is this op for this BE ? */
2321 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2322 continue;
2323
2324 switch (cmd) {
2325 case SNDRV_PCM_TRIGGER_START:
2326 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2327 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2328 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2329 continue;
2330
2331 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2332 if (ret)
2333 return ret;
2334
2335 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2336 break;
2337 case SNDRV_PCM_TRIGGER_RESUME:
2338 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2339 continue;
2340
2341 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2342 if (ret)
2343 return ret;
2344
2345 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2346 break;
2347 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2348 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2349 continue;
2350
2351 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2352 if (ret)
2353 return ret;
2354
2355 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2356 break;
2357 case SNDRV_PCM_TRIGGER_STOP:
2358 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2359 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2360 continue;
2361
2362 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2363 continue;
2364
2365 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2366 if (ret)
2367 return ret;
2368
2369 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2370 break;
2371 case SNDRV_PCM_TRIGGER_SUSPEND:
2372 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2373 continue;
2374
2375 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2376 continue;
2377
2378 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2379 if (ret)
2380 return ret;
2381
2382 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2383 break;
2384 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2385 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2386 continue;
2387
2388 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2389 continue;
2390
2391 ret = dpcm_do_trigger(dpcm, be_substream, cmd);
2392 if (ret)
2393 return ret;
2394
2395 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2396 break;
2397 }
2398 }
2399
2400 return ret;
2401 }
2402 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2403
2404 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2405 int cmd, bool fe_first)
2406 {
2407 struct snd_soc_pcm_runtime *fe = substream->private_data;
2408 int ret;
2409
2410 /* call trigger on the frontend before the backend. */
2411 if (fe_first) {
2412 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2413 fe->dai_link->name, cmd);
2414
2415 ret = soc_pcm_trigger(substream, cmd);
2416 if (ret < 0)
2417 return ret;
2418
2419 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2420 return ret;
2421 }
2422
2423 /* call trigger on the frontend after the backend. */
2424 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2425 if (ret < 0)
2426 return ret;
2427
2428 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2429 fe->dai_link->name, cmd);
2430
2431 ret = soc_pcm_trigger(substream, cmd);
2432
2433 return ret;
2434 }
2435
2436 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2437 {
2438 struct snd_soc_pcm_runtime *fe = substream->private_data;
2439 int stream = substream->stream;
2440 int ret = 0;
2441 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2442
2443 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2444
2445 switch (trigger) {
2446 case SND_SOC_DPCM_TRIGGER_PRE:
2447 switch (cmd) {
2448 case SNDRV_PCM_TRIGGER_START:
2449 case SNDRV_PCM_TRIGGER_RESUME:
2450 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2451 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2452 break;
2453 case SNDRV_PCM_TRIGGER_STOP:
2454 case SNDRV_PCM_TRIGGER_SUSPEND:
2455 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2456 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2457 break;
2458 default:
2459 ret = -EINVAL;
2460 break;
2461 }
2462 break;
2463 case SND_SOC_DPCM_TRIGGER_POST:
2464 switch (cmd) {
2465 case SNDRV_PCM_TRIGGER_START:
2466 case SNDRV_PCM_TRIGGER_RESUME:
2467 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2468 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2469 break;
2470 case SNDRV_PCM_TRIGGER_STOP:
2471 case SNDRV_PCM_TRIGGER_SUSPEND:
2472 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2473 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2474 break;
2475 default:
2476 ret = -EINVAL;
2477 break;
2478 }
2479 break;
2480 case SND_SOC_DPCM_TRIGGER_BESPOKE:
2481 /* bespoke trigger() - handles both FE and BEs */
2482
2483 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
2484 fe->dai_link->name, cmd);
2485
2486 ret = soc_pcm_bespoke_trigger(substream, cmd);
2487 break;
2488 default:
2489 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2490 fe->dai_link->name);
2491 ret = -EINVAL;
2492 goto out;
2493 }
2494
2495 if (ret < 0) {
2496 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2497 cmd, ret);
2498 goto out;
2499 }
2500
2501 switch (cmd) {
2502 case SNDRV_PCM_TRIGGER_START:
2503 case SNDRV_PCM_TRIGGER_RESUME:
2504 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2505 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2506 break;
2507 case SNDRV_PCM_TRIGGER_STOP:
2508 case SNDRV_PCM_TRIGGER_SUSPEND:
2509 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2510 break;
2511 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2512 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2513 break;
2514 }
2515
2516 out:
2517 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2518 return ret;
2519 }
2520
2521 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2522 {
2523 struct snd_soc_pcm_runtime *fe = substream->private_data;
2524 int stream = substream->stream;
2525
2526 /* if FE's runtime_update is already set, we're in race;
2527 * process this trigger later at exit
2528 */
2529 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2530 fe->dpcm[stream].trigger_pending = cmd + 1;
2531 return 0; /* delayed, assuming it's successful */
2532 }
2533
2534 /* we're alone, let's trigger */
2535 return dpcm_fe_dai_do_trigger(substream, cmd);
2536 }
2537
2538 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2539 {
2540 struct snd_soc_dpcm *dpcm;
2541 int ret = 0;
2542
2543 for_each_dpcm_be(fe, stream, dpcm) {
2544
2545 struct snd_soc_pcm_runtime *be = dpcm->be;
2546 struct snd_pcm_substream *be_substream =
2547 snd_soc_dpcm_get_substream(be, stream);
2548
2549 /* is this op for this BE ? */
2550 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2551 continue;
2552
2553 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2554 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2555 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2556 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2557 continue;
2558
2559 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2560 be->dai_link->name);
2561
2562 ret = soc_pcm_prepare(be_substream);
2563 if (ret < 0) {
2564 dev_err(be->dev, "ASoC: backend prepare failed %d\n",
2565 ret);
2566 break;
2567 }
2568
2569 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2570 }
2571 return ret;
2572 }
2573
2574 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2575 {
2576 struct snd_soc_pcm_runtime *fe = substream->private_data;
2577 int stream = substream->stream, ret = 0;
2578
2579 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2580
2581 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2582
2583 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2584
2585 /* there is no point preparing this FE if there are no BEs */
2586 if (list_empty(&fe->dpcm[stream].be_clients)) {
2587 dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2588 fe->dai_link->name);
2589 ret = -EINVAL;
2590 goto out;
2591 }
2592
2593 ret = dpcm_be_dai_prepare(fe, stream);
2594 if (ret < 0)
2595 goto out;
2596
2597 /* call prepare on the frontend */
2598 ret = soc_pcm_prepare(substream);
2599 if (ret < 0) {
2600 dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
2601 fe->dai_link->name);
2602 goto out;
2603 }
2604
2605 /* run the stream event for each BE */
2606 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
2607 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2608
2609 out:
2610 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2611 mutex_unlock(&fe->card->mutex);
2612
2613 return ret;
2614 }
2615
2616 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2617 {
2618 struct snd_pcm_substream *substream =
2619 snd_soc_dpcm_get_substream(fe, stream);
2620 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2621 int err;
2622
2623 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2624 stream ? "capture" : "playback", fe->dai_link->name);
2625
2626 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2627 /* call bespoke trigger - FE takes care of all BE triggers */
2628 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
2629 fe->dai_link->name);
2630
2631 err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
2632 if (err < 0)
2633 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2634 } else {
2635 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
2636 fe->dai_link->name);
2637
2638 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2639 if (err < 0)
2640 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
2641 }
2642
2643 err = dpcm_be_dai_hw_free(fe, stream);
2644 if (err < 0)
2645 dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
2646
2647 err = dpcm_be_dai_shutdown(fe, stream);
2648 if (err < 0)
2649 dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
2650
2651 /* run the stream event for each BE */
2652 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2653
2654 return 0;
2655 }
2656
2657 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2658 {
2659 struct snd_pcm_substream *substream =
2660 snd_soc_dpcm_get_substream(fe, stream);
2661 struct snd_soc_dpcm *dpcm;
2662 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2663 int ret;
2664 unsigned long flags;
2665
2666 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2667 stream ? "capture" : "playback", fe->dai_link->name);
2668
2669 /* Only start the BE if the FE is ready */
2670 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2671 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
2672 return -EINVAL;
2673
2674 /* startup must always be called for new BEs */
2675 ret = dpcm_be_dai_startup(fe, stream);
2676 if (ret < 0)
2677 goto disconnect;
2678
2679 /* keep going if FE state is > open */
2680 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2681 return 0;
2682
2683 ret = dpcm_be_dai_hw_params(fe, stream);
2684 if (ret < 0)
2685 goto close;
2686
2687 /* keep going if FE state is > hw_params */
2688 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2689 return 0;
2690
2691
2692 ret = dpcm_be_dai_prepare(fe, stream);
2693 if (ret < 0)
2694 goto hw_free;
2695
2696 /* run the stream event for each BE */
2697 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2698
2699 /* keep going if FE state is > prepare */
2700 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2701 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2702 return 0;
2703
2704 if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
2705 /* call trigger on the frontend - FE takes care of all BE triggers */
2706 dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
2707 fe->dai_link->name);
2708
2709 ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
2710 if (ret < 0) {
2711 dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
2712 goto hw_free;
2713 }
2714 } else {
2715 dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
2716 fe->dai_link->name);
2717
2718 ret = dpcm_be_dai_trigger(fe, stream,
2719 SNDRV_PCM_TRIGGER_START);
2720 if (ret < 0) {
2721 dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
2722 goto hw_free;
2723 }
2724 }
2725
2726 return 0;
2727
2728 hw_free:
2729 dpcm_be_dai_hw_free(fe, stream);
2730 close:
2731 dpcm_be_dai_shutdown(fe, stream);
2732 disconnect:
2733 /* disconnect any non started BEs */
2734 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
2735 for_each_dpcm_be(fe, stream, dpcm) {
2736 struct snd_soc_pcm_runtime *be = dpcm->be;
2737 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2738 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2739 }
2740 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
2741
2742 return ret;
2743 }
2744
2745 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2746 {
2747 struct snd_soc_dapm_widget_list *list;
2748 int stream;
2749 int count, paths;
2750 int ret;
2751
2752 if (fe->num_cpus > 1) {
2753 dev_err(fe->dev,
2754 "%s doesn't support Multi CPU yet\n", __func__);
2755 return -EINVAL;
2756 }
2757
2758 if (!fe->dai_link->dynamic)
2759 return 0;
2760
2761 /* only check active links */
2762 if (!fe->cpu_dai->active)
2763 return 0;
2764
2765 /* DAPM sync will call this to update DSP paths */
2766 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2767 new ? "new" : "old", fe->dai_link->name);
2768
2769 for_each_pcm_streams(stream) {
2770
2771 /* skip if FE doesn't have playback/capture capability */
2772 if (!snd_soc_dai_stream_valid(fe->cpu_dai, stream) ||
2773 !snd_soc_dai_stream_valid(fe->codec_dai, stream))
2774 continue;
2775
2776 /* skip if FE isn't currently playing/capturing */
2777 if (!fe->cpu_dai->stream_active[stream] ||
2778 !fe->codec_dai->stream_active[stream])
2779 continue;
2780
2781 paths = dpcm_path_get(fe, stream, &list);
2782 if (paths < 0) {
2783 dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
2784 fe->dai_link->name,
2785 stream == SNDRV_PCM_STREAM_PLAYBACK ?
2786 "playback" : "capture");
2787 return paths;
2788 }
2789
2790 /* update any playback/capture paths */
2791 count = dpcm_process_paths(fe, stream, &list, new);
2792 if (count) {
2793 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2794 if (new)
2795 ret = dpcm_run_update_startup(fe, stream);
2796 else
2797 ret = dpcm_run_update_shutdown(fe, stream);
2798 if (ret < 0)
2799 dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
2800 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2801
2802 dpcm_clear_pending_state(fe, stream);
2803 dpcm_be_disconnect(fe, stream);
2804 }
2805
2806 dpcm_path_put(&list);
2807 }
2808
2809 return 0;
2810 }
2811
2812 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2813 * any DAI links.
2814 */
2815 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card)
2816 {
2817 struct snd_soc_pcm_runtime *fe;
2818 int ret = 0;
2819
2820 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2821 /* shutdown all old paths first */
2822 for_each_card_rtds(card, fe) {
2823 ret = soc_dpcm_fe_runtime_update(fe, 0);
2824 if (ret)
2825 goto out;
2826 }
2827
2828 /* bring new paths up */
2829 for_each_card_rtds(card, fe) {
2830 ret = soc_dpcm_fe_runtime_update(fe, 1);
2831 if (ret)
2832 goto out;
2833 }
2834
2835 out:
2836 mutex_unlock(&card->mutex);
2837 return ret;
2838 }
2839 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update);
2840
2841 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream)
2842 {
2843 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2844 struct snd_soc_dpcm *dpcm;
2845 int stream = fe_substream->stream;
2846
2847 /* mark FE's links ready to prune */
2848 for_each_dpcm_be(fe, stream, dpcm)
2849 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2850
2851 dpcm_be_disconnect(fe, stream);
2852
2853 fe->dpcm[stream].runtime = NULL;
2854 }
2855
2856 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2857 {
2858 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2859 int ret;
2860
2861 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2862 ret = dpcm_fe_dai_shutdown(fe_substream);
2863
2864 dpcm_fe_dai_cleanup(fe_substream);
2865
2866 mutex_unlock(&fe->card->mutex);
2867 return ret;
2868 }
2869
2870 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2871 {
2872 struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
2873 struct snd_soc_dapm_widget_list *list;
2874 int ret;
2875 int stream = fe_substream->stream;
2876
2877 mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
2878 fe->dpcm[stream].runtime = fe_substream->runtime;
2879
2880 ret = dpcm_path_get(fe, stream, &list);
2881 if (ret < 0) {
2882 goto open_end;
2883 } else if (ret == 0) {
2884 dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
2885 fe->dai_link->name, stream ? "capture" : "playback");
2886 }
2887
2888 /* calculate valid and active FE <-> BE dpcms */
2889 dpcm_process_paths(fe, stream, &list, 1);
2890
2891 ret = dpcm_fe_dai_startup(fe_substream);
2892 if (ret < 0)
2893 dpcm_fe_dai_cleanup(fe_substream);
2894
2895 dpcm_clear_pending_state(fe, stream);
2896 dpcm_path_put(&list);
2897 open_end:
2898 mutex_unlock(&fe->card->mutex);
2899 return ret;
2900 }
2901
2902 /* create a new pcm */
2903 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
2904 {
2905 struct snd_soc_dai *codec_dai;
2906 struct snd_soc_dai *cpu_dai;
2907 struct snd_soc_component *component;
2908 struct snd_pcm *pcm;
2909 char new_name[64];
2910 int ret = 0, playback = 0, capture = 0;
2911 int i;
2912
2913 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
2914 playback = rtd->dai_link->dpcm_playback;
2915 capture = rtd->dai_link->dpcm_capture;
2916 } else {
2917 /* Adapt stream for codec2codec links */
2918 int cpu_capture = rtd->dai_link->params ?
2919 SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
2920 int cpu_playback = rtd->dai_link->params ?
2921 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2922
2923 for_each_rtd_codec_dais(rtd, i, codec_dai) {
2924 if (rtd->num_cpus == 1) {
2925 cpu_dai = rtd->cpu_dais[0];
2926 } else if (rtd->num_cpus == rtd->num_codecs) {
2927 cpu_dai = rtd->cpu_dais[i];
2928 } else {
2929 dev_err(rtd->card->dev,
2930 "N cpus to M codecs link is not supported yet\n");
2931 return -EINVAL;
2932 }
2933
2934 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2935 snd_soc_dai_stream_valid(cpu_dai, cpu_playback))
2936 playback = 1;
2937 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2938 snd_soc_dai_stream_valid(cpu_dai, cpu_capture))
2939 capture = 1;
2940 }
2941 }
2942
2943 if (rtd->dai_link->playback_only) {
2944 playback = 1;
2945 capture = 0;
2946 }
2947
2948 if (rtd->dai_link->capture_only) {
2949 playback = 0;
2950 capture = 1;
2951 }
2952
2953 /* create the PCM */
2954 if (rtd->dai_link->params) {
2955 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2956 rtd->dai_link->stream_name);
2957
2958 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2959 playback, capture, &pcm);
2960 } else if (rtd->dai_link->no_pcm) {
2961 snprintf(new_name, sizeof(new_name), "(%s)",
2962 rtd->dai_link->stream_name);
2963
2964 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
2965 playback, capture, &pcm);
2966 } else {
2967 if (rtd->dai_link->dynamic)
2968 snprintf(new_name, sizeof(new_name), "%s (*)",
2969 rtd->dai_link->stream_name);
2970 else
2971 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2972 rtd->dai_link->stream_name,
2973 (rtd->num_codecs > 1) ?
2974 "multicodec" : rtd->codec_dai->name, num);
2975
2976 ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
2977 capture, &pcm);
2978 }
2979 if (ret < 0) {
2980 dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
2981 rtd->dai_link->name);
2982 return ret;
2983 }
2984 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
2985
2986 /* DAPM dai link stream work */
2987 if (rtd->dai_link->params)
2988 rtd->close_delayed_work_func = codec2codec_close_delayed_work;
2989 else
2990 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
2991
2992 pcm->nonatomic = rtd->dai_link->nonatomic;
2993 rtd->pcm = pcm;
2994 pcm->private_data = rtd;
2995
2996 if (rtd->dai_link->no_pcm || rtd->dai_link->params) {
2997 if (playback)
2998 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2999 if (capture)
3000 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
3001 goto out;
3002 }
3003
3004 /* ASoC PCM operations */
3005 if (rtd->dai_link->dynamic) {
3006 rtd->ops.open = dpcm_fe_dai_open;
3007 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
3008 rtd->ops.prepare = dpcm_fe_dai_prepare;
3009 rtd->ops.trigger = dpcm_fe_dai_trigger;
3010 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
3011 rtd->ops.close = dpcm_fe_dai_close;
3012 rtd->ops.pointer = soc_pcm_pointer;
3013 } else {
3014 rtd->ops.open = soc_pcm_open;
3015 rtd->ops.hw_params = soc_pcm_hw_params;
3016 rtd->ops.prepare = soc_pcm_prepare;
3017 rtd->ops.trigger = soc_pcm_trigger;
3018 rtd->ops.hw_free = soc_pcm_hw_free;
3019 rtd->ops.close = soc_pcm_close;
3020 rtd->ops.pointer = soc_pcm_pointer;
3021 }
3022
3023 for_each_rtd_components(rtd, i, component) {
3024 const struct snd_soc_component_driver *drv = component->driver;
3025
3026 if (drv->ioctl)
3027 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
3028 if (drv->sync_stop)
3029 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
3030 if (drv->copy_user)
3031 rtd->ops.copy_user = snd_soc_pcm_component_copy_user;
3032 if (drv->page)
3033 rtd->ops.page = snd_soc_pcm_component_page;
3034 if (drv->mmap)
3035 rtd->ops.mmap = snd_soc_pcm_component_mmap;
3036 }
3037
3038 if (playback)
3039 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3040
3041 if (capture)
3042 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3043
3044 ret = snd_soc_pcm_component_new(rtd);
3045 if (ret < 0) {
3046 dev_err(rtd->dev, "ASoC: pcm constructor failed: %d\n", ret);
3047 return ret;
3048 }
3049
3050 pcm->no_device_suspend = true;
3051 out:
3052 dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
3053 (rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
3054 (rtd->num_cpus > 1) ? "multicpu" : rtd->cpu_dai->name);
3055 return ret;
3056 }
3057
3058 /* is the current PCM operation for this FE ? */
3059 int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
3060 {
3061 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
3062 return 1;
3063 return 0;
3064 }
3065 EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
3066
3067 /* is the current PCM operation for this BE ? */
3068 int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
3069 struct snd_soc_pcm_runtime *be, int stream)
3070 {
3071 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
3072 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
3073 be->dpcm[stream].runtime_update))
3074 return 1;
3075 return 0;
3076 }
3077 EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
3078
3079 /* get the substream for this BE */
3080 struct snd_pcm_substream *
3081 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3082 {
3083 return be->pcm->streams[stream].substream;
3084 }
3085 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3086
3087 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
3088 struct snd_soc_pcm_runtime *be,
3089 int stream,
3090 const enum snd_soc_dpcm_state *states,
3091 int num_states)
3092 {
3093 struct snd_soc_dpcm *dpcm;
3094 int state;
3095 int ret = 1;
3096 unsigned long flags;
3097 int i;
3098
3099 spin_lock_irqsave(&fe->card->dpcm_lock, flags);
3100 for_each_dpcm_fe(be, stream, dpcm) {
3101
3102 if (dpcm->fe == fe)
3103 continue;
3104
3105 state = dpcm->fe->dpcm[stream].state;
3106 for (i = 0; i < num_states; i++) {
3107 if (state == states[i]) {
3108 ret = 0;
3109 break;
3110 }
3111 }
3112 }
3113 spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
3114
3115 /* it's safe to do this BE DAI */
3116 return ret;
3117 }
3118
3119 /*
3120 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
3121 * are not running, paused or suspended for the specified stream direction.
3122 */
3123 int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
3124 struct snd_soc_pcm_runtime *be, int stream)
3125 {
3126 const enum snd_soc_dpcm_state state[] = {
3127 SND_SOC_DPCM_STATE_START,
3128 SND_SOC_DPCM_STATE_PAUSED,
3129 SND_SOC_DPCM_STATE_SUSPEND,
3130 };
3131
3132 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3133 }
3134 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
3135
3136 /*
3137 * We can only change hw params a BE DAI if any of it's FE are not prepared,
3138 * running, paused or suspended for the specified stream direction.
3139 */
3140 int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
3141 struct snd_soc_pcm_runtime *be, int stream)
3142 {
3143 const enum snd_soc_dpcm_state state[] = {
3144 SND_SOC_DPCM_STATE_START,
3145 SND_SOC_DPCM_STATE_PAUSED,
3146 SND_SOC_DPCM_STATE_SUSPEND,
3147 SND_SOC_DPCM_STATE_PREPARE,
3148 };
3149
3150 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
3151 }
3152 EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
Linux with added FPC-III support