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