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