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 <[email protected]>
11 // Mark Brown <[email protected]>
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/slab.h>
18 #include <linux/workqueue.h>
19 #include <linux/export.h>
20 #include <linux/debugfs.h>
21 #include <sound/core.h>
22 #include <sound/pcm.h>
23 #include <sound/pcm_params.h>
24 #include <sound/soc.h>
25 #include <sound/soc-dpcm.h>
26 #include <sound/soc-link.h>
27 #include <sound/initval.h>
28
29 #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)30 static inline int _soc_pcm_ret(struct snd_soc_pcm_runtime *rtd,
31 const char *func, int ret)
32 {
33 /* Positive, Zero values are not errors */
34 if (ret >= 0)
35 return ret;
36
37 /* Negative values might be errors */
38 switch (ret) {
39 case -EPROBE_DEFER:
40 case -ENOTSUPP:
41 break;
42 default:
43 dev_err(rtd->dev,
44 "ASoC: error at %s on %s: %d\n",
45 func, rtd->dai_link->name, ret);
46 }
47
48 return ret;
49 }
50
51 /* is the current PCM operation for this FE ? */
52 #if 0
53 static int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
54 {
55 if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
56 return 1;
57 return 0;
58 }
59 #endif
60
61 /* 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)62 static int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
63 struct snd_soc_pcm_runtime *be, int stream)
64 {
65 if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
66 ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
67 be->dpcm[stream].runtime_update))
68 return 1;
69 return 0;
70 }
71
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)72 static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
73 struct snd_soc_pcm_runtime *be,
74 int stream,
75 const enum snd_soc_dpcm_state *states,
76 int num_states)
77 {
78 struct snd_soc_dpcm *dpcm;
79 int state;
80 int ret = 1;
81 int i;
82
83 for_each_dpcm_fe(be, stream, dpcm) {
84
85 if (dpcm->fe == fe)
86 continue;
87
88 state = dpcm->fe->dpcm[stream].state;
89 for (i = 0; i < num_states; i++) {
90 if (state == states[i]) {
91 ret = 0;
92 break;
93 }
94 }
95 }
96
97 /* it's safe to do this BE DAI */
98 return ret;
99 }
100
101 /*
102 * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
103 * are not running, paused or suspended for the specified stream direction.
104 */
snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime * fe,struct snd_soc_pcm_runtime * be,int stream)105 static int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
106 struct snd_soc_pcm_runtime *be, int stream)
107 {
108 const enum snd_soc_dpcm_state state[] = {
109 SND_SOC_DPCM_STATE_START,
110 SND_SOC_DPCM_STATE_PAUSED,
111 SND_SOC_DPCM_STATE_SUSPEND,
112 };
113
114 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
115 }
116
117 /*
118 * We can only change hw params a BE DAI if any of it's FE are not prepared,
119 * running, paused or suspended for the specified stream direction.
120 */
snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime * fe,struct snd_soc_pcm_runtime * be,int stream)121 static int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
122 struct snd_soc_pcm_runtime *be, int stream)
123 {
124 const enum snd_soc_dpcm_state state[] = {
125 SND_SOC_DPCM_STATE_START,
126 SND_SOC_DPCM_STATE_PAUSED,
127 SND_SOC_DPCM_STATE_SUSPEND,
128 SND_SOC_DPCM_STATE_PREPARE,
129 };
130
131 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
132 }
133
134 /*
135 * We can only prepare a BE DAI if any of it's FE are not prepared,
136 * running or paused for the specified stream direction.
137 */
snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime * fe,struct snd_soc_pcm_runtime * be,int stream)138 static int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
139 struct snd_soc_pcm_runtime *be, int stream)
140 {
141 const enum snd_soc_dpcm_state state[] = {
142 SND_SOC_DPCM_STATE_START,
143 SND_SOC_DPCM_STATE_PAUSED,
144 SND_SOC_DPCM_STATE_PREPARE,
145 };
146
147 return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
148 }
149
150 #define DPCM_MAX_BE_USERS 8
151
soc_cpu_dai_name(struct snd_soc_pcm_runtime * rtd)152 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd)
153 {
154 return (rtd)->dai_link->num_cpus == 1 ? snd_soc_rtd_to_cpu(rtd, 0)->name : "multicpu";
155 }
soc_codec_dai_name(struct snd_soc_pcm_runtime * rtd)156 static inline const char *soc_codec_dai_name(struct snd_soc_pcm_runtime *rtd)
157 {
158 return (rtd)->dai_link->num_codecs == 1 ? snd_soc_rtd_to_codec(rtd, 0)->name : "multicodec";
159 }
160
161 #ifdef CONFIG_DEBUG_FS
dpcm_state_string(enum snd_soc_dpcm_state state)162 static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
163 {
164 switch (state) {
165 case SND_SOC_DPCM_STATE_NEW:
166 return "new";
167 case SND_SOC_DPCM_STATE_OPEN:
168 return "open";
169 case SND_SOC_DPCM_STATE_HW_PARAMS:
170 return "hw_params";
171 case SND_SOC_DPCM_STATE_PREPARE:
172 return "prepare";
173 case SND_SOC_DPCM_STATE_START:
174 return "start";
175 case SND_SOC_DPCM_STATE_STOP:
176 return "stop";
177 case SND_SOC_DPCM_STATE_SUSPEND:
178 return "suspend";
179 case SND_SOC_DPCM_STATE_PAUSED:
180 return "paused";
181 case SND_SOC_DPCM_STATE_HW_FREE:
182 return "hw_free";
183 case SND_SOC_DPCM_STATE_CLOSE:
184 return "close";
185 }
186
187 return "unknown";
188 }
189
dpcm_show_state(struct snd_soc_pcm_runtime * fe,int stream,char * buf,size_t size)190 static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
191 int stream, char *buf, size_t size)
192 {
193 struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
194 struct snd_soc_dpcm *dpcm;
195 ssize_t offset = 0;
196
197 /* FE state */
198 offset += scnprintf(buf + offset, size - offset,
199 "[%s - %s]\n", fe->dai_link->name,
200 stream ? "Capture" : "Playback");
201
202 offset += scnprintf(buf + offset, size - offset, "State: %s\n",
203 dpcm_state_string(fe->dpcm[stream].state));
204
205 if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
206 (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
207 offset += scnprintf(buf + offset, size - offset,
208 "Hardware Params: "
209 "Format = %s, Channels = %d, Rate = %d\n",
210 snd_pcm_format_name(params_format(params)),
211 params_channels(params),
212 params_rate(params));
213
214 /* BEs state */
215 offset += scnprintf(buf + offset, size - offset, "Backends:\n");
216
217 if (list_empty(&fe->dpcm[stream].be_clients)) {
218 offset += scnprintf(buf + offset, size - offset,
219 " No active DSP links\n");
220 goto out;
221 }
222
223 for_each_dpcm_be(fe, stream, dpcm) {
224 struct snd_soc_pcm_runtime *be = dpcm->be;
225 params = &be->dpcm[stream].hw_params;
226
227 offset += scnprintf(buf + offset, size - offset,
228 "- %s\n", be->dai_link->name);
229
230 offset += scnprintf(buf + offset, size - offset,
231 " State: %s\n",
232 dpcm_state_string(be->dpcm[stream].state));
233
234 if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
235 (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
236 offset += scnprintf(buf + offset, size - offset,
237 " Hardware Params: "
238 "Format = %s, Channels = %d, Rate = %d\n",
239 snd_pcm_format_name(params_format(params)),
240 params_channels(params),
241 params_rate(params));
242 }
243 out:
244 return offset;
245 }
246
dpcm_state_read_file(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)247 static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
248 size_t count, loff_t *ppos)
249 {
250 struct snd_soc_pcm_runtime *fe = file->private_data;
251 ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
252 int stream;
253 char *buf;
254
255 if (fe->dai_link->num_cpus > 1) {
256 dev_err(fe->dev,
257 "%s doesn't support Multi CPU yet\n", __func__);
258 return -EINVAL;
259 }
260
261 buf = kmalloc(out_count, GFP_KERNEL);
262 if (!buf)
263 return -ENOMEM;
264
265 snd_soc_dpcm_mutex_lock(fe);
266 for_each_pcm_streams(stream)
267 if (snd_soc_dai_stream_valid(snd_soc_rtd_to_cpu(fe, 0), stream))
268 offset += dpcm_show_state(fe, stream,
269 buf + offset,
270 out_count - offset);
271 snd_soc_dpcm_mutex_unlock(fe);
272
273 ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
274
275 kfree(buf);
276 return ret;
277 }
278
279 static const struct file_operations dpcm_state_fops = {
280 .open = simple_open,
281 .read = dpcm_state_read_file,
282 .llseek = default_llseek,
283 };
284
soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime * rtd)285 void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
286 {
287 if (!rtd->dai_link->dynamic)
288 return;
289
290 if (!rtd->card->debugfs_card_root)
291 return;
292
293 rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
294 rtd->card->debugfs_card_root);
295
296 debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
297 rtd, &dpcm_state_fops);
298 }
299
dpcm_create_debugfs_state(struct snd_soc_dpcm * dpcm,int stream)300 static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream)
301 {
302 char *name;
303
304 name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name,
305 snd_pcm_direction_name(stream));
306 if (name) {
307 dpcm->debugfs_state = debugfs_create_dir(
308 name, dpcm->fe->debugfs_dpcm_root);
309 debugfs_create_u32("state", 0644, dpcm->debugfs_state,
310 &dpcm->state);
311 kfree(name);
312 }
313 }
314
dpcm_remove_debugfs_state(struct snd_soc_dpcm * dpcm)315 static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
316 {
317 debugfs_remove_recursive(dpcm->debugfs_state);
318 }
319
320 #else
dpcm_create_debugfs_state(struct snd_soc_dpcm * dpcm,int stream)321 static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm,
322 int stream)
323 {
324 }
325
dpcm_remove_debugfs_state(struct snd_soc_dpcm * dpcm)326 static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
327 {
328 }
329 #endif
330
331 /* Set FE's runtime_update state; the state is protected via PCM stream lock
332 * for avoiding the race with trigger callback.
333 * If the state is unset and a trigger is pending while the previous operation,
334 * process the pending trigger action here.
335 */
336 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)337 static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
338 int stream, enum snd_soc_dpcm_update state)
339 {
340 struct snd_pcm_substream *substream =
341 snd_soc_dpcm_get_substream(fe, stream);
342
343 snd_pcm_stream_lock_irq(substream);
344 if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
345 dpcm_fe_dai_do_trigger(substream,
346 fe->dpcm[stream].trigger_pending - 1);
347 fe->dpcm[stream].trigger_pending = 0;
348 }
349 fe->dpcm[stream].runtime_update = state;
350 snd_pcm_stream_unlock_irq(substream);
351 }
352
dpcm_set_be_update_state(struct snd_soc_pcm_runtime * be,int stream,enum snd_soc_dpcm_update state)353 static void dpcm_set_be_update_state(struct snd_soc_pcm_runtime *be,
354 int stream, enum snd_soc_dpcm_update state)
355 {
356 be->dpcm[stream].runtime_update = state;
357 }
358
359 /**
360 * snd_soc_runtime_action() - Increment/Decrement active count for
361 * PCM runtime components
362 * @rtd: ASoC PCM runtime that is activated
363 * @stream: Direction of the PCM stream
364 * @action: Activate stream if 1. Deactivate if -1.
365 *
366 * Increments/Decrements the active count for all the DAIs and components
367 * attached to a PCM runtime.
368 * Should typically be called when a stream is opened.
369 *
370 * Must be called with the rtd->card->pcm_mutex being held
371 */
snd_soc_runtime_action(struct snd_soc_pcm_runtime * rtd,int stream,int action)372 void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd,
373 int stream, int action)
374 {
375 struct snd_soc_component *component;
376 struct snd_soc_dai *dai;
377 int i;
378
379 snd_soc_dpcm_mutex_assert_held(rtd);
380
381 for_each_rtd_dais(rtd, i, dai)
382 snd_soc_dai_action(dai, stream, action);
383
384 /* Increments/Decrements the active count for components without DAIs */
385 for_each_rtd_components(rtd, i, component) {
386 if (component->num_dai)
387 continue;
388 component->active += action;
389 }
390 }
391 EXPORT_SYMBOL_GPL(snd_soc_runtime_action);
392
393 /**
394 * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
395 * @rtd: The ASoC PCM runtime that should be checked.
396 *
397 * This function checks whether the power down delay should be ignored for a
398 * specific PCM runtime. Returns true if the delay is 0, if the DAI link has
399 * been configured to ignore the delay, or if none of the components benefits
400 * from having the delay.
401 */
snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime * rtd)402 bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
403 {
404 struct snd_soc_component *component;
405 int i;
406
407 if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
408 return true;
409
410 for_each_rtd_components(rtd, i, component)
411 if (component->driver->use_pmdown_time)
412 /* No need to go through all components */
413 return false;
414
415 return true;
416 }
417
418 /* 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)419 int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
420 int event)
421 {
422 struct snd_soc_dpcm *dpcm;
423
424 snd_soc_dpcm_mutex_assert_held(fe);
425
426 for_each_dpcm_be(fe, dir, dpcm) {
427
428 struct snd_soc_pcm_runtime *be = dpcm->be;
429
430 dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
431 be->dai_link->name, event, dir);
432
433 if ((event == SND_SOC_DAPM_STREAM_STOP) &&
434 (be->dpcm[dir].users >= 1))
435 continue;
436
437 snd_soc_dapm_stream_event(be, dir, event);
438 }
439
440 snd_soc_dapm_stream_event(fe, dir, event);
441
442 return 0;
443 }
444
soc_pcm_set_dai_params(struct snd_soc_dai * dai,struct snd_pcm_hw_params * params)445 static void soc_pcm_set_dai_params(struct snd_soc_dai *dai,
446 struct snd_pcm_hw_params *params)
447 {
448 if (params) {
449 dai->symmetric_rate = params_rate(params);
450 dai->symmetric_channels = params_channels(params);
451 dai->symmetric_sample_bits = snd_pcm_format_physical_width(params_format(params));
452 } else {
453 dai->symmetric_rate = 0;
454 dai->symmetric_channels = 0;
455 dai->symmetric_sample_bits = 0;
456 }
457 }
458
soc_pcm_apply_symmetry(struct snd_pcm_substream * substream,struct snd_soc_dai * soc_dai)459 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
460 struct snd_soc_dai *soc_dai)
461 {
462 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
463 int ret;
464
465 if (!snd_soc_dai_active(soc_dai))
466 return 0;
467
468 #define __soc_pcm_apply_symmetry(name, NAME) \
469 if (soc_dai->symmetric_##name && \
470 (soc_dai->driver->symmetric_##name || rtd->dai_link->symmetric_##name)) { \
471 dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %s to %d\n",\
472 #name, soc_dai->symmetric_##name); \
473 \
474 ret = snd_pcm_hw_constraint_single(substream->runtime, \
475 SNDRV_PCM_HW_PARAM_##NAME,\
476 soc_dai->symmetric_##name); \
477 if (ret < 0) { \
478 dev_err(soc_dai->dev, \
479 "ASoC: Unable to apply %s constraint: %d\n",\
480 #name, ret); \
481 return ret; \
482 } \
483 }
484
485 __soc_pcm_apply_symmetry(rate, RATE);
486 __soc_pcm_apply_symmetry(channels, CHANNELS);
487 __soc_pcm_apply_symmetry(sample_bits, SAMPLE_BITS);
488
489 return 0;
490 }
491
soc_pcm_params_symmetry(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)492 static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
493 struct snd_pcm_hw_params *params)
494 {
495 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
496 struct snd_soc_dai d;
497 struct snd_soc_dai *dai;
498 struct snd_soc_dai *cpu_dai;
499 unsigned int symmetry, i;
500
501 d.name = __func__;
502 soc_pcm_set_dai_params(&d, params);
503
504 #define __soc_pcm_params_symmetry(xxx) \
505 symmetry = rtd->dai_link->symmetric_##xxx; \
506 for_each_rtd_dais(rtd, i, dai) \
507 symmetry |= dai->driver->symmetric_##xxx; \
508 \
509 if (symmetry) \
510 for_each_rtd_cpu_dais(rtd, i, cpu_dai) \
511 if (!snd_soc_dai_is_dummy(cpu_dai) && \
512 cpu_dai->symmetric_##xxx && \
513 cpu_dai->symmetric_##xxx != d.symmetric_##xxx) { \
514 dev_err(rtd->dev, "ASoC: unmatched %s symmetry: %s:%d - %s:%d\n", \
515 #xxx, cpu_dai->name, cpu_dai->symmetric_##xxx, \
516 d.name, d.symmetric_##xxx); \
517 return -EINVAL; \
518 }
519
520 /* reject unmatched parameters when applying symmetry */
521 __soc_pcm_params_symmetry(rate);
522 __soc_pcm_params_symmetry(channels);
523 __soc_pcm_params_symmetry(sample_bits);
524
525 return 0;
526 }
527
soc_pcm_update_symmetry(struct snd_pcm_substream * substream)528 static void soc_pcm_update_symmetry(struct snd_pcm_substream *substream)
529 {
530 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
531 struct snd_soc_dai_link *link = rtd->dai_link;
532 struct snd_soc_dai *dai;
533 unsigned int symmetry, i;
534
535 symmetry = link->symmetric_rate ||
536 link->symmetric_channels ||
537 link->symmetric_sample_bits;
538
539 for_each_rtd_dais(rtd, i, dai)
540 symmetry = symmetry ||
541 dai->driver->symmetric_rate ||
542 dai->driver->symmetric_channels ||
543 dai->driver->symmetric_sample_bits;
544
545 if (symmetry)
546 substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
547 }
548
soc_pcm_set_msb(struct snd_pcm_substream * substream,int bits)549 static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
550 {
551 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
552 int ret;
553
554 if (!bits)
555 return;
556
557 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
558 if (ret != 0)
559 dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
560 bits, ret);
561 }
562
soc_pcm_apply_msb(struct snd_pcm_substream * substream)563 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
564 {
565 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
566 struct snd_soc_dai *cpu_dai;
567 struct snd_soc_dai *codec_dai;
568 int stream = substream->stream;
569 int i;
570 unsigned int bits = 0, cpu_bits = 0;
571
572 for_each_rtd_codec_dais(rtd, i, codec_dai) {
573 const struct snd_soc_pcm_stream *pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream);
574
575 if (pcm_codec->sig_bits == 0) {
576 bits = 0;
577 break;
578 }
579 bits = max(pcm_codec->sig_bits, bits);
580 }
581
582 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
583 const struct snd_soc_pcm_stream *pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
584
585 if (pcm_cpu->sig_bits == 0) {
586 cpu_bits = 0;
587 break;
588 }
589 cpu_bits = max(pcm_cpu->sig_bits, cpu_bits);
590 }
591
592 soc_pcm_set_msb(substream, bits);
593 soc_pcm_set_msb(substream, cpu_bits);
594 }
595
soc_pcm_hw_init(struct snd_pcm_hardware * hw)596 static void soc_pcm_hw_init(struct snd_pcm_hardware *hw)
597 {
598 hw->rates = UINT_MAX;
599 hw->rate_min = 0;
600 hw->rate_max = UINT_MAX;
601 hw->channels_min = 0;
602 hw->channels_max = UINT_MAX;
603 hw->formats = ULLONG_MAX;
604 }
605
soc_pcm_hw_update_rate(struct snd_pcm_hardware * hw,const struct snd_soc_pcm_stream * p)606 static void soc_pcm_hw_update_rate(struct snd_pcm_hardware *hw,
607 const struct snd_soc_pcm_stream *p)
608 {
609 hw->rates = snd_pcm_rate_mask_intersect(hw->rates, p->rates);
610
611 /* setup hw->rate_min/max via hw->rates first */
612 snd_pcm_hw_limit_rates(hw);
613
614 /* update hw->rate_min/max by snd_soc_pcm_stream */
615 hw->rate_min = max(hw->rate_min, p->rate_min);
616 hw->rate_max = min_not_zero(hw->rate_max, p->rate_max);
617 }
618
soc_pcm_hw_update_chan(struct snd_pcm_hardware * hw,const struct snd_soc_pcm_stream * p)619 static void soc_pcm_hw_update_chan(struct snd_pcm_hardware *hw,
620 const struct snd_soc_pcm_stream *p)
621 {
622 hw->channels_min = max(hw->channels_min, p->channels_min);
623 hw->channels_max = min(hw->channels_max, p->channels_max);
624 }
625
soc_pcm_hw_update_format(struct snd_pcm_hardware * hw,const struct snd_soc_pcm_stream * p)626 static void soc_pcm_hw_update_format(struct snd_pcm_hardware *hw,
627 const struct snd_soc_pcm_stream *p)
628 {
629 hw->formats &= p->formats;
630 }
631
soc_pcm_hw_update_subformat(struct snd_pcm_hardware * hw,const struct snd_soc_pcm_stream * p)632 static void soc_pcm_hw_update_subformat(struct snd_pcm_hardware *hw,
633 const struct snd_soc_pcm_stream *p)
634 {
635 hw->subformats &= p->subformats;
636 }
637
638 /**
639 * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream
640 * @rtd: ASoC PCM runtime
641 * @hw: PCM hardware parameters (output)
642 * @stream: Direction of the PCM stream
643 *
644 * Calculates the subset of stream parameters supported by all DAIs
645 * associated with the PCM stream.
646 */
snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime * rtd,struct snd_pcm_hardware * hw,int stream)647 int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd,
648 struct snd_pcm_hardware *hw, int stream)
649 {
650 struct snd_soc_dai *codec_dai;
651 struct snd_soc_dai *cpu_dai;
652 const struct snd_soc_pcm_stream *codec_stream;
653 const struct snd_soc_pcm_stream *cpu_stream;
654 unsigned int cpu_chan_min = 0, cpu_chan_max = UINT_MAX;
655 int i;
656
657 soc_pcm_hw_init(hw);
658
659 /* first calculate min/max only for CPUs in the DAI link */
660 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
661
662 /*
663 * Skip CPUs which don't support the current stream type.
664 * Otherwise, since the rate, channel, and format values will
665 * zero in that case, we would have no usable settings left,
666 * causing the resulting setup to fail.
667 */
668 if (!snd_soc_dai_stream_valid(cpu_dai, stream))
669 continue;
670
671 cpu_stream = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
672
673 soc_pcm_hw_update_chan(hw, cpu_stream);
674 soc_pcm_hw_update_rate(hw, cpu_stream);
675 soc_pcm_hw_update_format(hw, cpu_stream);
676 soc_pcm_hw_update_subformat(hw, cpu_stream);
677 }
678 cpu_chan_min = hw->channels_min;
679 cpu_chan_max = hw->channels_max;
680
681 /* second calculate min/max only for CODECs in the DAI link */
682 for_each_rtd_codec_dais(rtd, i, codec_dai) {
683
684 /*
685 * Skip CODECs which don't support the current stream type.
686 * Otherwise, since the rate, channel, and format values will
687 * zero in that case, we would have no usable settings left,
688 * causing the resulting setup to fail.
689 */
690 if (!snd_soc_dai_stream_valid(codec_dai, stream))
691 continue;
692
693 codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream);
694
695 soc_pcm_hw_update_chan(hw, codec_stream);
696 soc_pcm_hw_update_rate(hw, codec_stream);
697 soc_pcm_hw_update_format(hw, codec_stream);
698 soc_pcm_hw_update_subformat(hw, codec_stream);
699 }
700
701 /* Verify both a valid CPU DAI and a valid CODEC DAI were found */
702 if (!hw->channels_min)
703 return -EINVAL;
704
705 /*
706 * chan min/max cannot be enforced if there are multiple CODEC DAIs
707 * connected to CPU DAI(s), use CPU DAI's directly and let
708 * channel allocation be fixed up later
709 */
710 if (rtd->dai_link->num_codecs > 1) {
711 hw->channels_min = cpu_chan_min;
712 hw->channels_max = cpu_chan_max;
713 }
714
715 return 0;
716 }
717 EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw);
718
soc_pcm_init_runtime_hw(struct snd_pcm_substream * substream)719 static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
720 {
721 struct snd_pcm_hardware *hw = &substream->runtime->hw;
722 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
723 u64 formats = hw->formats;
724
725 /*
726 * At least one CPU and one CODEC should match. Otherwise, we should
727 * have bailed out on a higher level, since there would be no CPU or
728 * CODEC to support the transfer direction in that case.
729 */
730 snd_soc_runtime_calc_hw(rtd, hw, substream->stream);
731
732 if (formats)
733 hw->formats &= formats;
734 }
735
soc_pcm_components_open(struct snd_pcm_substream * substream)736 static int soc_pcm_components_open(struct snd_pcm_substream *substream)
737 {
738 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
739 struct snd_soc_component *component;
740 int i, ret = 0;
741
742 for_each_rtd_components(rtd, i, component) {
743 ret = snd_soc_component_module_get_when_open(component, substream);
744 if (ret < 0)
745 break;
746
747 ret = snd_soc_component_open(component, substream);
748 if (ret < 0)
749 break;
750 }
751
752 return ret;
753 }
754
soc_pcm_components_close(struct snd_pcm_substream * substream,int rollback)755 static int soc_pcm_components_close(struct snd_pcm_substream *substream,
756 int rollback)
757 {
758 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
759 struct snd_soc_component *component;
760 int i, ret = 0;
761
762 for_each_rtd_components(rtd, i, component) {
763 int r = snd_soc_component_close(component, substream, rollback);
764 if (r < 0)
765 ret = r; /* use last ret */
766
767 snd_soc_component_module_put_when_close(component, substream, rollback);
768 }
769
770 return ret;
771 }
772
soc_pcm_clean(struct snd_soc_pcm_runtime * rtd,struct snd_pcm_substream * substream,int rollback)773 static int soc_pcm_clean(struct snd_soc_pcm_runtime *rtd,
774 struct snd_pcm_substream *substream, int rollback)
775 {
776 struct snd_soc_component *component;
777 struct snd_soc_dai *dai;
778 int i;
779
780 snd_soc_dpcm_mutex_assert_held(rtd);
781
782 if (!rollback) {
783 snd_soc_runtime_deactivate(rtd, substream->stream);
784
785 /* Make sure DAI parameters cleared if the DAI becomes inactive */
786 for_each_rtd_dais(rtd, i, dai) {
787 if (snd_soc_dai_active(dai) == 0)
788 soc_pcm_set_dai_params(dai, NULL);
789 }
790 }
791
792 for_each_rtd_dais_reverse(rtd, i, dai)
793 snd_soc_dai_shutdown(dai, substream, rollback);
794
795 snd_soc_link_shutdown(substream, rollback);
796
797 soc_pcm_components_close(substream, rollback);
798
799 snd_soc_pcm_component_pm_runtime_put(rtd, substream, rollback);
800
801 for_each_rtd_components(rtd, i, component)
802 if (!snd_soc_component_active(component))
803 pinctrl_pm_select_sleep_state(component->dev);
804
805 return 0;
806 }
807
808 /*
809 * Called by ALSA when a PCM substream is closed. Private data can be
810 * freed here. The cpu DAI, codec DAI, machine and components are also
811 * shutdown.
812 */
__soc_pcm_close(struct snd_soc_pcm_runtime * rtd,struct snd_pcm_substream * substream)813 static int __soc_pcm_close(struct snd_soc_pcm_runtime *rtd,
814 struct snd_pcm_substream *substream)
815 {
816 return soc_pcm_clean(rtd, substream, 0);
817 }
818
819 /* PCM close ops for non-DPCM streams */
soc_pcm_close(struct snd_pcm_substream * substream)820 static int soc_pcm_close(struct snd_pcm_substream *substream)
821 {
822 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
823
824 snd_soc_dpcm_mutex_lock(rtd);
825 __soc_pcm_close(rtd, substream);
826 snd_soc_dpcm_mutex_unlock(rtd);
827 return 0;
828 }
829
soc_hw_sanity_check(struct snd_pcm_substream * substream)830 static int soc_hw_sanity_check(struct snd_pcm_substream *substream)
831 {
832 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
833 struct snd_pcm_hardware *hw = &substream->runtime->hw;
834 const char *name_cpu = soc_cpu_dai_name(rtd);
835 const char *name_codec = soc_codec_dai_name(rtd);
836 const char *err_msg;
837 struct device *dev = rtd->dev;
838
839 err_msg = "rates";
840 if (!hw->rates)
841 goto config_err;
842
843 err_msg = "formats";
844 if (!hw->formats)
845 goto config_err;
846
847 err_msg = "channels";
848 if (!hw->channels_min || !hw->channels_max ||
849 hw->channels_min > hw->channels_max)
850 goto config_err;
851
852 dev_dbg(dev, "ASoC: %s <-> %s info:\n", name_codec,
853 name_cpu);
854 dev_dbg(dev, "ASoC: rate mask 0x%x\n", hw->rates);
855 dev_dbg(dev, "ASoC: ch min %d max %d\n", hw->channels_min,
856 hw->channels_max);
857 dev_dbg(dev, "ASoC: rate min %d max %d\n", hw->rate_min,
858 hw->rate_max);
859
860 return 0;
861
862 config_err:
863 dev_err(dev, "ASoC: %s <-> %s No matching %s\n",
864 name_codec, name_cpu, err_msg);
865 return -EINVAL;
866 }
867
868 /*
869 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
870 * then initialized and any private data can be allocated. This also calls
871 * startup for the cpu DAI, component, machine and codec DAI.
872 */
__soc_pcm_open(struct snd_soc_pcm_runtime * rtd,struct snd_pcm_substream * substream)873 static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd,
874 struct snd_pcm_substream *substream)
875 {
876 struct snd_soc_component *component;
877 struct snd_soc_dai *dai;
878 int i, ret = 0;
879
880 snd_soc_dpcm_mutex_assert_held(rtd);
881
882 for_each_rtd_components(rtd, i, component)
883 pinctrl_pm_select_default_state(component->dev);
884
885 ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream);
886 if (ret < 0)
887 goto err;
888
889 ret = soc_pcm_components_open(substream);
890 if (ret < 0)
891 goto err;
892
893 ret = snd_soc_link_startup(substream);
894 if (ret < 0)
895 goto err;
896
897 /* startup the audio subsystem */
898 for_each_rtd_dais(rtd, i, dai) {
899 ret = snd_soc_dai_startup(dai, substream);
900 if (ret < 0)
901 goto err;
902 }
903
904 /* Dynamic PCM DAI links compat checks use dynamic capabilities */
905 if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
906 goto dynamic;
907
908 /* Check that the codec and cpu DAIs are compatible */
909 soc_pcm_init_runtime_hw(substream);
910
911 soc_pcm_update_symmetry(substream);
912
913 ret = soc_hw_sanity_check(substream);
914 if (ret < 0)
915 goto err;
916
917 soc_pcm_apply_msb(substream);
918
919 /* Symmetry only applies if we've already got an active stream. */
920 for_each_rtd_dais(rtd, i, dai) {
921 ret = soc_pcm_apply_symmetry(substream, dai);
922 if (ret != 0)
923 goto err;
924 }
925 dynamic:
926 snd_soc_runtime_activate(rtd, substream->stream);
927 ret = 0;
928 err:
929 if (ret < 0)
930 soc_pcm_clean(rtd, substream, 1);
931
932 return soc_pcm_ret(rtd, ret);
933 }
934
935 /* PCM open ops for non-DPCM streams */
soc_pcm_open(struct snd_pcm_substream * substream)936 static int soc_pcm_open(struct snd_pcm_substream *substream)
937 {
938 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
939 int ret;
940
941 snd_soc_dpcm_mutex_lock(rtd);
942 ret = __soc_pcm_open(rtd, substream);
943 snd_soc_dpcm_mutex_unlock(rtd);
944 return ret;
945 }
946
947 /*
948 * Called by ALSA when the PCM substream is prepared, can set format, sample
949 * rate, etc. This function is non atomic and can be called multiple times,
950 * it can refer to the runtime info.
951 */
__soc_pcm_prepare(struct snd_soc_pcm_runtime * rtd,struct snd_pcm_substream * substream)952 static int __soc_pcm_prepare(struct snd_soc_pcm_runtime *rtd,
953 struct snd_pcm_substream *substream)
954 {
955 struct snd_soc_dai *dai;
956 int i, ret = 0;
957
958 snd_soc_dpcm_mutex_assert_held(rtd);
959
960 ret = snd_soc_link_prepare(substream);
961 if (ret < 0)
962 goto out;
963
964 ret = snd_soc_pcm_component_prepare(substream);
965 if (ret < 0)
966 goto out;
967
968 ret = snd_soc_pcm_dai_prepare(substream);
969 if (ret < 0)
970 goto out;
971
972 /* cancel any delayed stream shutdown that is pending */
973 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
974 rtd->pop_wait) {
975 rtd->pop_wait = 0;
976 cancel_delayed_work(&rtd->delayed_work);
977 }
978
979 snd_soc_dapm_stream_event(rtd, substream->stream,
980 SND_SOC_DAPM_STREAM_START);
981
982 for_each_rtd_dais(rtd, i, dai) {
983 if (dai->driver->ops && !dai->driver->ops->mute_unmute_on_trigger)
984 snd_soc_dai_digital_mute(dai, 0, substream->stream);
985 }
986
987 out:
988 /*
989 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity
990 *
991 * We don't want to log an error since we do not want to give userspace a way to do a
992 * denial-of-service attack on the syslog / diskspace.
993 */
994 return ret;
995 }
996
997 /* PCM prepare ops for non-DPCM streams */
soc_pcm_prepare(struct snd_pcm_substream * substream)998 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
999 {
1000 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
1001 int ret;
1002
1003 snd_soc_dpcm_mutex_lock(rtd);
1004 ret = __soc_pcm_prepare(rtd, substream);
1005 snd_soc_dpcm_mutex_unlock(rtd);
1006
1007 /*
1008 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity
1009 *
1010 * We don't want to log an error since we do not want to give userspace a way to do a
1011 * denial-of-service attack on the syslog / diskspace.
1012 */
1013 return ret;
1014 }
1015
soc_pcm_codec_params_fixup(struct snd_pcm_hw_params * params,unsigned int mask)1016 static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
1017 unsigned int mask)
1018 {
1019 struct snd_interval *interval;
1020 int channels = hweight_long(mask);
1021
1022 interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1023 interval->min = channels;
1024 interval->max = channels;
1025 }
1026
soc_pcm_hw_clean(struct snd_soc_pcm_runtime * rtd,struct snd_pcm_substream * substream,int rollback)1027 static int soc_pcm_hw_clean(struct snd_soc_pcm_runtime *rtd,
1028 struct snd_pcm_substream *substream, int rollback)
1029 {
1030 struct snd_soc_dai *dai;
1031 int i;
1032
1033 snd_soc_dpcm_mutex_assert_held(rtd);
1034
1035 /* clear the corresponding DAIs parameters when going to be inactive */
1036 for_each_rtd_dais(rtd, i, dai) {
1037 if (snd_soc_dai_active(dai) == 1)
1038 soc_pcm_set_dai_params(dai, NULL);
1039
1040 if (snd_soc_dai_stream_active(dai, substream->stream) == 1) {
1041 if (dai->driver->ops && !dai->driver->ops->mute_unmute_on_trigger)
1042 snd_soc_dai_digital_mute(dai, 1, substream->stream);
1043 }
1044 }
1045
1046 /* run the stream event */
1047 snd_soc_dapm_stream_stop(rtd, substream->stream);
1048
1049 /* free any machine hw params */
1050 snd_soc_link_hw_free(substream, rollback);
1051
1052 /* free any component resources */
1053 snd_soc_pcm_component_hw_free(substream, rollback);
1054
1055 /* now free hw params for the DAIs */
1056 for_each_rtd_dais(rtd, i, dai)
1057 if (snd_soc_dai_stream_valid(dai, substream->stream))
1058 snd_soc_dai_hw_free(dai, substream, rollback);
1059
1060 return 0;
1061 }
1062
1063 /*
1064 * Frees resources allocated by hw_params, can be called multiple times
1065 */
__soc_pcm_hw_free(struct snd_soc_pcm_runtime * rtd,struct snd_pcm_substream * substream)1066 static int __soc_pcm_hw_free(struct snd_soc_pcm_runtime *rtd,
1067 struct snd_pcm_substream *substream)
1068 {
1069 return soc_pcm_hw_clean(rtd, substream, 0);
1070 }
1071
1072 /* hw_free PCM ops for non-DPCM streams */
soc_pcm_hw_free(struct snd_pcm_substream * substream)1073 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
1074 {
1075 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
1076 int ret;
1077
1078 snd_soc_dpcm_mutex_lock(rtd);
1079 ret = __soc_pcm_hw_free(rtd, substream);
1080 snd_soc_dpcm_mutex_unlock(rtd);
1081 return ret;
1082 }
1083
1084 /*
1085 * Called by ALSA when the hardware params are set by application. This
1086 * function can also be called multiple times and can allocate buffers
1087 * (using snd_pcm_lib_* ). It's non-atomic.
1088 */
__soc_pcm_hw_params(struct snd_soc_pcm_runtime * rtd,struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)1089 static int __soc_pcm_hw_params(struct snd_soc_pcm_runtime *rtd,
1090 struct snd_pcm_substream *substream,
1091 struct snd_pcm_hw_params *params)
1092 {
1093 struct snd_soc_dai *cpu_dai;
1094 struct snd_soc_dai *codec_dai;
1095 struct snd_pcm_hw_params tmp_params;
1096 int i, ret = 0;
1097
1098 snd_soc_dpcm_mutex_assert_held(rtd);
1099
1100 ret = soc_pcm_params_symmetry(substream, params);
1101 if (ret)
1102 goto out;
1103
1104 ret = snd_soc_link_hw_params(substream, params);
1105 if (ret < 0)
1106 goto out;
1107
1108 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1109 unsigned int tdm_mask = snd_soc_dai_tdm_mask_get(codec_dai, substream->stream);
1110
1111 /*
1112 * Skip CODECs which don't support the current stream type,
1113 * the idea being that if a CODEC is not used for the currently
1114 * set up transfer direction, it should not need to be
1115 * configured, especially since the configuration used might
1116 * not even be supported by that CODEC. There may be cases
1117 * however where a CODEC needs to be set up although it is
1118 * actually not being used for the transfer, e.g. if a
1119 * capture-only CODEC is acting as an LRCLK and/or BCLK master
1120 * for the DAI link including a playback-only CODEC.
1121 * If this becomes necessary, we will have to augment the
1122 * machine driver setup with information on how to act, so
1123 * we can do the right thing here.
1124 */
1125 if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
1126 continue;
1127
1128 /* copy params for each codec */
1129 tmp_params = *params;
1130
1131 /* fixup params based on TDM slot masks */
1132 if (tdm_mask)
1133 soc_pcm_codec_params_fixup(&tmp_params, tdm_mask);
1134
1135 ret = snd_soc_dai_hw_params(codec_dai, substream,
1136 &tmp_params);
1137 if(ret < 0)
1138 goto out;
1139
1140 soc_pcm_set_dai_params(codec_dai, &tmp_params);
1141 snd_soc_dapm_update_dai(substream, &tmp_params, codec_dai);
1142 }
1143
1144 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1145 struct snd_soc_dai_link_ch_map *ch_maps;
1146 unsigned int ch_mask = 0;
1147 int j;
1148
1149 /*
1150 * Skip CPUs which don't support the current stream
1151 * type. See soc_pcm_init_runtime_hw() for more details
1152 */
1153 if (!snd_soc_dai_stream_valid(cpu_dai, substream->stream))
1154 continue;
1155
1156 /* copy params for each cpu */
1157 tmp_params = *params;
1158
1159 /*
1160 * construct cpu channel mask by combining ch_mask of each
1161 * codec which maps to the cpu.
1162 * see
1163 * soc.h :: [dai_link->ch_maps Image sample]
1164 */
1165 for_each_rtd_ch_maps(rtd, j, ch_maps)
1166 if (ch_maps->cpu == i)
1167 ch_mask |= ch_maps->ch_mask;
1168
1169 /* fixup cpu channel number */
1170 if (ch_mask)
1171 soc_pcm_codec_params_fixup(&tmp_params, ch_mask);
1172
1173 ret = snd_soc_dai_hw_params(cpu_dai, substream, &tmp_params);
1174 if (ret < 0)
1175 goto out;
1176
1177 /* store the parameters for each DAI */
1178 soc_pcm_set_dai_params(cpu_dai, &tmp_params);
1179 snd_soc_dapm_update_dai(substream, &tmp_params, cpu_dai);
1180 }
1181
1182 ret = snd_soc_pcm_component_hw_params(substream, params);
1183 out:
1184 if (ret < 0)
1185 soc_pcm_hw_clean(rtd, substream, 1);
1186
1187 return soc_pcm_ret(rtd, ret);
1188 }
1189
1190 /* hw_params PCM ops for non-DPCM streams */
soc_pcm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)1191 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
1192 struct snd_pcm_hw_params *params)
1193 {
1194 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
1195 int ret;
1196
1197 snd_soc_dpcm_mutex_lock(rtd);
1198 ret = __soc_pcm_hw_params(rtd, substream, params);
1199 snd_soc_dpcm_mutex_unlock(rtd);
1200 return ret;
1201 }
1202
1203 #define TRIGGER_MAX 3
1204 static int (* const trigger[][TRIGGER_MAX])(struct snd_pcm_substream *substream, int cmd, int rollback) = {
1205 [SND_SOC_TRIGGER_ORDER_DEFAULT] = {
1206 snd_soc_link_trigger,
1207 snd_soc_pcm_component_trigger,
1208 snd_soc_pcm_dai_trigger,
1209 },
1210 [SND_SOC_TRIGGER_ORDER_LDC] = {
1211 snd_soc_link_trigger,
1212 snd_soc_pcm_dai_trigger,
1213 snd_soc_pcm_component_trigger,
1214 },
1215 };
1216
soc_pcm_trigger(struct snd_pcm_substream * substream,int cmd)1217 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1218 {
1219 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
1220 struct snd_soc_component *component;
1221 int ret = 0, r = 0, i;
1222 int rollback = 0;
1223 int start = 0, stop = 0;
1224
1225 /*
1226 * select START/STOP sequence
1227 */
1228 for_each_rtd_components(rtd, i, component) {
1229 if (component->driver->trigger_start)
1230 start = component->driver->trigger_start;
1231 if (component->driver->trigger_stop)
1232 stop = component->driver->trigger_stop;
1233 }
1234 if (rtd->dai_link->trigger_start)
1235 start = rtd->dai_link->trigger_start;
1236 if (rtd->dai_link->trigger_stop)
1237 stop = rtd->dai_link->trigger_stop;
1238
1239 if (start < 0 || start >= SND_SOC_TRIGGER_ORDER_MAX ||
1240 stop < 0 || stop >= SND_SOC_TRIGGER_ORDER_MAX)
1241 return -EINVAL;
1242
1243 /*
1244 * START
1245 */
1246 switch (cmd) {
1247 case SNDRV_PCM_TRIGGER_START:
1248 case SNDRV_PCM_TRIGGER_RESUME:
1249 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1250 for (i = 0; i < TRIGGER_MAX; i++) {
1251 r = trigger[start][i](substream, cmd, 0);
1252 if (r < 0)
1253 break;
1254 }
1255 }
1256
1257 /*
1258 * Rollback if START failed
1259 * find correspond STOP command
1260 */
1261 if (r < 0) {
1262 rollback = 1;
1263 ret = r;
1264 switch (cmd) {
1265 case SNDRV_PCM_TRIGGER_START:
1266 cmd = SNDRV_PCM_TRIGGER_STOP;
1267 break;
1268 case SNDRV_PCM_TRIGGER_RESUME:
1269 cmd = SNDRV_PCM_TRIGGER_SUSPEND;
1270 break;
1271 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1272 cmd = SNDRV_PCM_TRIGGER_PAUSE_PUSH;
1273 break;
1274 }
1275 }
1276
1277 /*
1278 * STOP
1279 */
1280 switch (cmd) {
1281 case SNDRV_PCM_TRIGGER_STOP:
1282 case SNDRV_PCM_TRIGGER_SUSPEND:
1283 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1284 for (i = TRIGGER_MAX; i > 0; i--) {
1285 r = trigger[stop][i - 1](substream, cmd, rollback);
1286 if (r < 0)
1287 ret = r;
1288 }
1289 }
1290
1291 return ret;
1292 }
1293
1294 /*
1295 * soc level wrapper for pointer callback
1296 * If cpu_dai, codec_dai, component driver has the delay callback, then
1297 * the runtime->delay will be updated via snd_soc_pcm_component/dai_delay().
1298 */
soc_pcm_pointer(struct snd_pcm_substream * substream)1299 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
1300 {
1301 struct snd_pcm_runtime *runtime = substream->runtime;
1302 snd_pcm_uframes_t offset = 0;
1303 snd_pcm_sframes_t codec_delay = 0;
1304 snd_pcm_sframes_t cpu_delay = 0;
1305
1306 offset = snd_soc_pcm_component_pointer(substream);
1307
1308 /* should be called *after* snd_soc_pcm_component_pointer() */
1309 snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay);
1310 snd_soc_pcm_component_delay(substream, &cpu_delay, &codec_delay);
1311
1312 runtime->delay = cpu_delay + codec_delay;
1313
1314 return offset;
1315 }
1316
1317 /* connect a FE and BE */
dpcm_be_connect(struct snd_soc_pcm_runtime * fe,struct snd_soc_pcm_runtime * be,int stream)1318 static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
1319 struct snd_soc_pcm_runtime *be, int stream)
1320 {
1321 struct snd_pcm_substream *fe_substream;
1322 struct snd_pcm_substream *be_substream;
1323 struct snd_soc_dpcm *dpcm;
1324
1325 snd_soc_dpcm_mutex_assert_held(fe);
1326
1327 /* only add new dpcms */
1328 for_each_dpcm_be(fe, stream, dpcm) {
1329 if (dpcm->be == be && dpcm->fe == fe)
1330 return 0;
1331 }
1332
1333 fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1334 be_substream = snd_soc_dpcm_get_substream(be, stream);
1335
1336 if (!fe_substream->pcm->nonatomic && be_substream->pcm->nonatomic) {
1337 dev_err(be->dev, "%s: FE is atomic but BE is nonatomic, invalid configuration\n",
1338 __func__);
1339 return -EINVAL;
1340 }
1341 if (fe_substream->pcm->nonatomic && !be_substream->pcm->nonatomic) {
1342 dev_dbg(be->dev, "FE is nonatomic but BE is not, forcing BE as nonatomic\n");
1343 be_substream->pcm->nonatomic = 1;
1344 }
1345
1346 dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL);
1347 if (!dpcm)
1348 return -ENOMEM;
1349
1350 dpcm->be = be;
1351 dpcm->fe = fe;
1352 dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW;
1353 snd_pcm_stream_lock_irq(fe_substream);
1354 list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients);
1355 list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
1356 snd_pcm_stream_unlock_irq(fe_substream);
1357
1358 dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
1359 snd_pcm_direction_name(stream), fe->dai_link->name,
1360 stream ? "<-" : "->", be->dai_link->name);
1361
1362 dpcm_create_debugfs_state(dpcm, stream);
1363
1364 return 1;
1365 }
1366
1367 /* reparent a BE onto another FE */
dpcm_be_reparent(struct snd_soc_pcm_runtime * fe,struct snd_soc_pcm_runtime * be,int stream)1368 static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
1369 struct snd_soc_pcm_runtime *be, int stream)
1370 {
1371 struct snd_soc_dpcm *dpcm;
1372 struct snd_pcm_substream *fe_substream, *be_substream;
1373
1374 /* reparent if BE is connected to other FEs */
1375 if (!be->dpcm[stream].users)
1376 return;
1377
1378 be_substream = snd_soc_dpcm_get_substream(be, stream);
1379 if (!be_substream)
1380 return;
1381
1382 for_each_dpcm_fe(be, stream, dpcm) {
1383 if (dpcm->fe == fe)
1384 continue;
1385
1386 dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
1387 snd_pcm_direction_name(stream),
1388 dpcm->fe->dai_link->name,
1389 stream ? "<-" : "->", dpcm->be->dai_link->name);
1390
1391 fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
1392 be_substream->runtime = fe_substream->runtime;
1393 break;
1394 }
1395 }
1396
1397 /* disconnect a BE and FE */
dpcm_be_disconnect(struct snd_soc_pcm_runtime * fe,int stream)1398 void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
1399 {
1400 struct snd_soc_dpcm *dpcm, *d;
1401 struct snd_pcm_substream *substream = snd_soc_dpcm_get_substream(fe, stream);
1402 LIST_HEAD(deleted_dpcms);
1403
1404 snd_soc_dpcm_mutex_assert_held(fe);
1405
1406 snd_pcm_stream_lock_irq(substream);
1407 for_each_dpcm_be_safe(fe, stream, dpcm, d) {
1408 dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
1409 snd_pcm_direction_name(stream),
1410 dpcm->be->dai_link->name);
1411
1412 if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
1413 continue;
1414
1415 dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
1416 snd_pcm_direction_name(stream), fe->dai_link->name,
1417 stream ? "<-" : "->", dpcm->be->dai_link->name);
1418
1419 /* BEs still alive need new FE */
1420 dpcm_be_reparent(fe, dpcm->be, stream);
1421
1422 list_del(&dpcm->list_be);
1423 list_move(&dpcm->list_fe, &deleted_dpcms);
1424 }
1425 snd_pcm_stream_unlock_irq(substream);
1426
1427 while (!list_empty(&deleted_dpcms)) {
1428 dpcm = list_first_entry(&deleted_dpcms, struct snd_soc_dpcm,
1429 list_fe);
1430 list_del(&dpcm->list_fe);
1431 dpcm_remove_debugfs_state(dpcm);
1432 kfree(dpcm);
1433 }
1434 }
1435
1436 /* get BE for DAI widget and stream */
dpcm_get_be(struct snd_soc_card * card,struct snd_soc_dapm_widget * widget,int stream)1437 static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
1438 struct snd_soc_dapm_widget *widget, int stream)
1439 {
1440 struct snd_soc_pcm_runtime *be;
1441 struct snd_soc_dapm_widget *w;
1442 struct snd_soc_dai *dai;
1443 int i;
1444
1445 dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
1446
1447 for_each_card_rtds(card, be) {
1448
1449 if (!be->dai_link->no_pcm)
1450 continue;
1451
1452 if (!snd_soc_dpcm_get_substream(be, stream))
1453 continue;
1454
1455 for_each_rtd_dais(be, i, dai) {
1456 w = snd_soc_dai_get_widget(dai, stream);
1457
1458 dev_dbg(card->dev, "ASoC: try BE : %s\n",
1459 w ? w->name : "(not set)");
1460
1461 if (w == widget)
1462 return be;
1463 }
1464 }
1465
1466 /* Widget provided is not a BE */
1467 return NULL;
1468 }
1469
widget_in_list(struct snd_soc_dapm_widget_list * list,struct snd_soc_dapm_widget * widget)1470 int widget_in_list(struct snd_soc_dapm_widget_list *list,
1471 struct snd_soc_dapm_widget *widget)
1472 {
1473 struct snd_soc_dapm_widget *w;
1474 int i;
1475
1476 for_each_dapm_widgets(list, i, w)
1477 if (widget == w)
1478 return 1;
1479
1480 return 0;
1481 }
1482 EXPORT_SYMBOL_GPL(widget_in_list);
1483
dpcm_end_walk_at_be(struct snd_soc_dapm_widget * widget,enum snd_soc_dapm_direction dir)1484 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget, enum snd_soc_dapm_direction dir)
1485 {
1486 struct snd_soc_card *card = widget->dapm->card;
1487 struct snd_soc_pcm_runtime *rtd;
1488 int stream;
1489
1490 /* adjust dir to stream */
1491 if (dir == SND_SOC_DAPM_DIR_OUT)
1492 stream = SNDRV_PCM_STREAM_PLAYBACK;
1493 else
1494 stream = SNDRV_PCM_STREAM_CAPTURE;
1495
1496 rtd = dpcm_get_be(card, widget, stream);
1497 if (rtd)
1498 return true;
1499
1500 return false;
1501 }
1502 EXPORT_SYMBOL_GPL(dpcm_end_walk_at_be);
1503
dpcm_path_get(struct snd_soc_pcm_runtime * fe,int stream,struct snd_soc_dapm_widget_list ** list)1504 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
1505 int stream, struct snd_soc_dapm_widget_list **list)
1506 {
1507 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(fe, 0);
1508 int paths;
1509
1510 if (fe->dai_link->num_cpus > 1) {
1511 dev_err(fe->dev,
1512 "%s doesn't support Multi CPU yet\n", __func__);
1513 return -EINVAL;
1514 }
1515
1516 /* get number of valid DAI paths and their widgets */
1517 paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
1518 fe->card->component_chaining ?
1519 NULL : dpcm_end_walk_at_be);
1520
1521 if (paths > 0)
1522 dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
1523 snd_pcm_direction_name(stream));
1524 else if (paths == 0)
1525 dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name,
1526 snd_pcm_direction_name(stream));
1527
1528 return paths;
1529 }
1530
dpcm_path_put(struct snd_soc_dapm_widget_list ** list)1531 void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
1532 {
1533 snd_soc_dapm_dai_free_widgets(list);
1534 }
1535
dpcm_be_is_active(struct snd_soc_dpcm * dpcm,int stream,struct snd_soc_dapm_widget_list * list)1536 static bool dpcm_be_is_active(struct snd_soc_dpcm *dpcm, int stream,
1537 struct snd_soc_dapm_widget_list *list)
1538 {
1539 struct snd_soc_dai *dai;
1540 unsigned int i;
1541
1542 /* is there a valid DAI widget for this BE */
1543 for_each_rtd_dais(dpcm->be, i, dai) {
1544 struct snd_soc_dapm_widget *widget = snd_soc_dai_get_widget(dai, stream);
1545
1546 /*
1547 * The BE is pruned only if none of the dai
1548 * widgets are in the active list.
1549 */
1550 if (widget && widget_in_list(list, widget))
1551 return true;
1552 }
1553
1554 return false;
1555 }
1556
dpcm_prune_paths(struct snd_soc_pcm_runtime * fe,int stream,struct snd_soc_dapm_widget_list ** list_)1557 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
1558 struct snd_soc_dapm_widget_list **list_)
1559 {
1560 struct snd_soc_dpcm *dpcm;
1561 int prune = 0;
1562
1563 /* Destroy any old FE <--> BE connections */
1564 for_each_dpcm_be(fe, stream, dpcm) {
1565 if (dpcm_be_is_active(dpcm, stream, *list_))
1566 continue;
1567
1568 dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
1569 snd_pcm_direction_name(stream),
1570 dpcm->be->dai_link->name, fe->dai_link->name);
1571 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
1572 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE);
1573 prune++;
1574 }
1575
1576 dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
1577 return prune;
1578 }
1579
dpcm_add_paths(struct snd_soc_pcm_runtime * fe,int stream,struct snd_soc_dapm_widget_list ** list_)1580 static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
1581 struct snd_soc_dapm_widget_list **list_)
1582 {
1583 struct snd_soc_card *card = fe->card;
1584 struct snd_soc_dapm_widget_list *list = *list_;
1585 struct snd_soc_pcm_runtime *be;
1586 struct snd_soc_dapm_widget *widget;
1587 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1588 int i, new = 0, err;
1589
1590 /* don't connect if FE is not running */
1591 if (!fe_substream->runtime && !fe->fe_compr)
1592 return new;
1593
1594 /* Create any new FE <--> BE connections */
1595 for_each_dapm_widgets(list, i, widget) {
1596
1597 switch (widget->id) {
1598 case snd_soc_dapm_dai_in:
1599 if (stream != SNDRV_PCM_STREAM_PLAYBACK)
1600 continue;
1601 break;
1602 case snd_soc_dapm_dai_out:
1603 if (stream != SNDRV_PCM_STREAM_CAPTURE)
1604 continue;
1605 break;
1606 default:
1607 continue;
1608 }
1609
1610 /* is there a valid BE rtd for this widget */
1611 be = dpcm_get_be(card, widget, stream);
1612 if (!be) {
1613 dev_dbg(fe->dev, "ASoC: no BE found for %s\n",
1614 widget->name);
1615 continue;
1616 }
1617
1618 /*
1619 * Filter for systems with 'component_chaining' enabled.
1620 * This helps to avoid unnecessary re-configuration of an
1621 * already active BE on such systems.
1622 */
1623 if (fe->card->component_chaining &&
1624 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1625 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1626 continue;
1627
1628 /* newly connected FE and BE */
1629 err = dpcm_be_connect(fe, be, stream);
1630 if (err < 0) {
1631 dev_err(fe->dev, "ASoC: can't connect %s\n",
1632 widget->name);
1633 break;
1634 } else if (err == 0) /* already connected */
1635 continue;
1636
1637 /* new */
1638 dpcm_set_be_update_state(be, stream, SND_SOC_DPCM_UPDATE_BE);
1639 new++;
1640 }
1641
1642 dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
1643 return new;
1644 }
1645
1646 /*
1647 * Find the corresponding BE DAIs that source or sink audio to this
1648 * FE substream.
1649 */
dpcm_process_paths(struct snd_soc_pcm_runtime * fe,int stream,struct snd_soc_dapm_widget_list ** list,int new)1650 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
1651 int stream, struct snd_soc_dapm_widget_list **list, int new)
1652 {
1653 if (new)
1654 return dpcm_add_paths(fe, stream, list);
1655 else
1656 return dpcm_prune_paths(fe, stream, list);
1657 }
1658
dpcm_clear_pending_state(struct snd_soc_pcm_runtime * fe,int stream)1659 void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
1660 {
1661 struct snd_soc_dpcm *dpcm;
1662
1663 for_each_dpcm_be(fe, stream, dpcm)
1664 dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_NO);
1665 }
1666
dpcm_be_dai_stop(struct snd_soc_pcm_runtime * fe,int stream,int do_hw_free,struct snd_soc_dpcm * last)1667 void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream,
1668 int do_hw_free, struct snd_soc_dpcm *last)
1669 {
1670 struct snd_soc_dpcm *dpcm;
1671
1672 /* disable any enabled and non active backends */
1673 for_each_dpcm_be(fe, stream, dpcm) {
1674 struct snd_soc_pcm_runtime *be = dpcm->be;
1675 struct snd_pcm_substream *be_substream =
1676 snd_soc_dpcm_get_substream(be, stream);
1677
1678 if (dpcm == last)
1679 return;
1680
1681 /* is this op for this BE ? */
1682 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1683 continue;
1684
1685 if (be->dpcm[stream].users == 0) {
1686 dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
1687 snd_pcm_direction_name(stream),
1688 be->dpcm[stream].state);
1689 continue;
1690 }
1691
1692 if (--be->dpcm[stream].users != 0)
1693 continue;
1694
1695 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) {
1696 if (!do_hw_free)
1697 continue;
1698
1699 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) {
1700 __soc_pcm_hw_free(be, be_substream);
1701 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
1702 }
1703 }
1704
1705 __soc_pcm_close(be, be_substream);
1706 be_substream->runtime = NULL;
1707 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1708 }
1709 }
1710
dpcm_be_dai_startup(struct snd_soc_pcm_runtime * fe,int stream)1711 int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
1712 {
1713 struct snd_pcm_substream *fe_substream = snd_soc_dpcm_get_substream(fe, stream);
1714 struct snd_soc_pcm_runtime *be;
1715 struct snd_soc_dpcm *dpcm;
1716 int err, count = 0;
1717
1718 /* only startup BE DAIs that are either sinks or sources to this FE DAI */
1719 for_each_dpcm_be(fe, stream, dpcm) {
1720 struct snd_pcm_substream *be_substream;
1721
1722 be = dpcm->be;
1723 be_substream = snd_soc_dpcm_get_substream(be, stream);
1724
1725 if (!be_substream) {
1726 dev_err(be->dev, "ASoC: no backend %s stream\n",
1727 snd_pcm_direction_name(stream));
1728 continue;
1729 }
1730
1731 /* is this op for this BE ? */
1732 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
1733 continue;
1734
1735 /* first time the dpcm is open ? */
1736 if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) {
1737 dev_err(be->dev, "ASoC: too many users %s at open %d\n",
1738 snd_pcm_direction_name(stream),
1739 be->dpcm[stream].state);
1740 continue;
1741 }
1742
1743 if (be->dpcm[stream].users++ != 0)
1744 continue;
1745
1746 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
1747 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
1748 continue;
1749
1750 dev_dbg(be->dev, "ASoC: open %s BE %s\n",
1751 snd_pcm_direction_name(stream), be->dai_link->name);
1752
1753 be_substream->runtime = fe_substream->runtime;
1754 err = __soc_pcm_open(be, be_substream);
1755 if (err < 0) {
1756 be->dpcm[stream].users--;
1757 if (be->dpcm[stream].users < 0)
1758 dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
1759 snd_pcm_direction_name(stream),
1760 be->dpcm[stream].state);
1761
1762 be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
1763 goto unwind;
1764 }
1765 be->dpcm[stream].be_start = 0;
1766 be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
1767 count++;
1768 }
1769
1770 return count;
1771
1772 unwind:
1773 dpcm_be_dai_startup_rollback(fe, stream, dpcm);
1774
1775 return soc_pcm_ret(fe, err);
1776 }
1777
dpcm_runtime_setup_fe(struct snd_pcm_substream * substream)1778 static void dpcm_runtime_setup_fe(struct snd_pcm_substream *substream)
1779 {
1780 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
1781 struct snd_pcm_runtime *runtime = substream->runtime;
1782 struct snd_pcm_hardware *hw = &runtime->hw;
1783 struct snd_soc_dai *dai;
1784 int stream = substream->stream;
1785 u64 formats = hw->formats;
1786 int i;
1787
1788 soc_pcm_hw_init(hw);
1789
1790 if (formats)
1791 hw->formats &= formats;
1792
1793 for_each_rtd_cpu_dais(fe, i, dai) {
1794 const struct snd_soc_pcm_stream *cpu_stream;
1795
1796 /*
1797 * Skip CPUs which don't support the current stream
1798 * type. See soc_pcm_init_runtime_hw() for more details
1799 */
1800 if (!snd_soc_dai_stream_valid(dai, stream))
1801 continue;
1802
1803 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1804
1805 soc_pcm_hw_update_rate(hw, cpu_stream);
1806 soc_pcm_hw_update_chan(hw, cpu_stream);
1807 soc_pcm_hw_update_format(hw, cpu_stream);
1808 soc_pcm_hw_update_subformat(hw, cpu_stream);
1809 }
1810
1811 }
1812
dpcm_runtime_setup_be_format(struct snd_pcm_substream * substream)1813 static void dpcm_runtime_setup_be_format(struct snd_pcm_substream *substream)
1814 {
1815 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
1816 struct snd_pcm_runtime *runtime = substream->runtime;
1817 struct snd_pcm_hardware *hw = &runtime->hw;
1818 struct snd_soc_dpcm *dpcm;
1819 struct snd_soc_dai *dai;
1820 int stream = substream->stream;
1821
1822 if (!fe->dai_link->dpcm_merged_format)
1823 return;
1824
1825 /*
1826 * It returns merged BE codec format
1827 * if FE want to use it (= dpcm_merged_format)
1828 */
1829
1830 for_each_dpcm_be(fe, stream, dpcm) {
1831 struct snd_soc_pcm_runtime *be = dpcm->be;
1832 const struct snd_soc_pcm_stream *codec_stream;
1833 int i;
1834
1835 for_each_rtd_codec_dais(be, i, dai) {
1836 /*
1837 * Skip CODECs which don't support the current stream
1838 * type. See soc_pcm_init_runtime_hw() for more details
1839 */
1840 if (!snd_soc_dai_stream_valid(dai, stream))
1841 continue;
1842
1843 codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1844
1845 soc_pcm_hw_update_format(hw, codec_stream);
1846 soc_pcm_hw_update_subformat(hw, codec_stream);
1847 }
1848 }
1849 }
1850
dpcm_runtime_setup_be_chan(struct snd_pcm_substream * substream)1851 static void dpcm_runtime_setup_be_chan(struct snd_pcm_substream *substream)
1852 {
1853 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
1854 struct snd_pcm_runtime *runtime = substream->runtime;
1855 struct snd_pcm_hardware *hw = &runtime->hw;
1856 struct snd_soc_dpcm *dpcm;
1857 int stream = substream->stream;
1858
1859 if (!fe->dai_link->dpcm_merged_chan)
1860 return;
1861
1862 /*
1863 * It returns merged BE codec channel;
1864 * if FE want to use it (= dpcm_merged_chan)
1865 */
1866
1867 for_each_dpcm_be(fe, stream, dpcm) {
1868 struct snd_soc_pcm_runtime *be = dpcm->be;
1869 const struct snd_soc_pcm_stream *cpu_stream;
1870 struct snd_soc_dai *dai;
1871 int i;
1872
1873 for_each_rtd_cpu_dais(be, i, dai) {
1874 /*
1875 * Skip CPUs which don't support the current stream
1876 * type. See soc_pcm_init_runtime_hw() for more details
1877 */
1878 if (!snd_soc_dai_stream_valid(dai, stream))
1879 continue;
1880
1881 cpu_stream = snd_soc_dai_get_pcm_stream(dai, stream);
1882
1883 soc_pcm_hw_update_chan(hw, cpu_stream);
1884 }
1885
1886 /*
1887 * chan min/max cannot be enforced if there are multiple CODEC
1888 * DAIs connected to a single CPU DAI, use CPU DAI's directly
1889 */
1890 if (be->dai_link->num_codecs == 1) {
1891 const struct snd_soc_pcm_stream *codec_stream = snd_soc_dai_get_pcm_stream(
1892 snd_soc_rtd_to_codec(be, 0), stream);
1893
1894 soc_pcm_hw_update_chan(hw, codec_stream);
1895 }
1896 }
1897 }
1898
dpcm_runtime_setup_be_rate(struct snd_pcm_substream * substream)1899 static void dpcm_runtime_setup_be_rate(struct snd_pcm_substream *substream)
1900 {
1901 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
1902 struct snd_pcm_runtime *runtime = substream->runtime;
1903 struct snd_pcm_hardware *hw = &runtime->hw;
1904 struct snd_soc_dpcm *dpcm;
1905 int stream = substream->stream;
1906
1907 if (!fe->dai_link->dpcm_merged_rate)
1908 return;
1909
1910 /*
1911 * It returns merged BE codec channel;
1912 * if FE want to use it (= dpcm_merged_chan)
1913 */
1914
1915 for_each_dpcm_be(fe, stream, dpcm) {
1916 struct snd_soc_pcm_runtime *be = dpcm->be;
1917 const struct snd_soc_pcm_stream *pcm;
1918 struct snd_soc_dai *dai;
1919 int i;
1920
1921 for_each_rtd_dais(be, i, dai) {
1922 /*
1923 * Skip DAIs which don't support the current stream
1924 * type. See soc_pcm_init_runtime_hw() for more details
1925 */
1926 if (!snd_soc_dai_stream_valid(dai, stream))
1927 continue;
1928
1929 pcm = snd_soc_dai_get_pcm_stream(dai, stream);
1930
1931 soc_pcm_hw_update_rate(hw, pcm);
1932 }
1933 }
1934 }
1935
dpcm_apply_symmetry(struct snd_pcm_substream * fe_substream,int stream)1936 static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
1937 int stream)
1938 {
1939 struct snd_soc_dpcm *dpcm;
1940 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream);
1941 struct snd_soc_dai *fe_cpu_dai;
1942 int err = 0;
1943 int i;
1944
1945 /* apply symmetry for FE */
1946 soc_pcm_update_symmetry(fe_substream);
1947
1948 for_each_rtd_cpu_dais (fe, i, fe_cpu_dai) {
1949 /* Symmetry only applies if we've got an active stream. */
1950 err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
1951 if (err < 0)
1952 goto error;
1953 }
1954
1955 /* apply symmetry for BE */
1956 for_each_dpcm_be(fe, stream, dpcm) {
1957 struct snd_soc_pcm_runtime *be = dpcm->be;
1958 struct snd_pcm_substream *be_substream =
1959 snd_soc_dpcm_get_substream(be, stream);
1960 struct snd_soc_pcm_runtime *rtd;
1961 struct snd_soc_dai *dai;
1962
1963 /* A backend may not have the requested substream */
1964 if (!be_substream)
1965 continue;
1966
1967 rtd = snd_soc_substream_to_rtd(be_substream);
1968 if (rtd->dai_link->be_hw_params_fixup)
1969 continue;
1970
1971 soc_pcm_update_symmetry(be_substream);
1972
1973 /* Symmetry only applies if we've got an active stream. */
1974 for_each_rtd_dais(rtd, i, dai) {
1975 err = soc_pcm_apply_symmetry(fe_substream, dai);
1976 if (err < 0)
1977 goto error;
1978 }
1979 }
1980 error:
1981 return soc_pcm_ret(fe, err);
1982 }
1983
dpcm_fe_dai_startup(struct snd_pcm_substream * fe_substream)1984 static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
1985 {
1986 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream);
1987 int stream = fe_substream->stream, ret = 0;
1988
1989 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
1990
1991 ret = dpcm_be_dai_startup(fe, stream);
1992 if (ret < 0)
1993 goto be_err;
1994
1995 dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
1996
1997 /* start the DAI frontend */
1998 ret = __soc_pcm_open(fe, fe_substream);
1999 if (ret < 0)
2000 goto unwind;
2001
2002 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
2003
2004 dpcm_runtime_setup_fe(fe_substream);
2005
2006 dpcm_runtime_setup_be_format(fe_substream);
2007 dpcm_runtime_setup_be_chan(fe_substream);
2008 dpcm_runtime_setup_be_rate(fe_substream);
2009
2010 ret = dpcm_apply_symmetry(fe_substream, stream);
2011
2012 unwind:
2013 if (ret < 0)
2014 dpcm_be_dai_startup_unwind(fe, stream);
2015 be_err:
2016 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2017
2018 return soc_pcm_ret(fe, ret);
2019 }
2020
dpcm_fe_dai_shutdown(struct snd_pcm_substream * substream)2021 static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
2022 {
2023 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2024 int stream = substream->stream;
2025
2026 snd_soc_dpcm_mutex_assert_held(fe);
2027
2028 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2029
2030 /* shutdown the BEs */
2031 dpcm_be_dai_shutdown(fe, stream);
2032
2033 dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
2034
2035 /* now shutdown the frontend */
2036 __soc_pcm_close(fe, substream);
2037
2038 /* run the stream stop event */
2039 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
2040
2041 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
2042 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2043 return 0;
2044 }
2045
dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime * fe,int stream)2046 void dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
2047 {
2048 struct snd_soc_dpcm *dpcm;
2049
2050 /* only hw_params backends that are either sinks or sources
2051 * to this frontend DAI */
2052 for_each_dpcm_be(fe, stream, dpcm) {
2053
2054 struct snd_soc_pcm_runtime *be = dpcm->be;
2055 struct snd_pcm_substream *be_substream =
2056 snd_soc_dpcm_get_substream(be, stream);
2057
2058 /* is this op for this BE ? */
2059 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2060 continue;
2061
2062 /* only free hw when no longer used - check all FEs */
2063 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2064 continue;
2065
2066 /* do not free hw if this BE is used by other FE */
2067 if (be->dpcm[stream].users > 1)
2068 continue;
2069
2070 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2071 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2072 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2073 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
2074 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2075 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2076 continue;
2077
2078 dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
2079 be->dai_link->name);
2080
2081 __soc_pcm_hw_free(be, be_substream);
2082
2083 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2084 }
2085 }
2086
dpcm_fe_dai_hw_free(struct snd_pcm_substream * substream)2087 static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
2088 {
2089 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2090 int stream = substream->stream;
2091
2092 snd_soc_dpcm_mutex_lock(fe);
2093 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2094
2095 dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
2096
2097 /* call hw_free on the frontend */
2098 soc_pcm_hw_clean(fe, substream, 0);
2099
2100 /* only hw_params backends that are either sinks or sources
2101 * to this frontend DAI */
2102 dpcm_be_dai_hw_free(fe, stream);
2103
2104 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
2105 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2106
2107 snd_soc_dpcm_mutex_unlock(fe);
2108 return 0;
2109 }
2110
dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime * fe,int stream)2111 int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
2112 {
2113 struct snd_soc_pcm_runtime *be;
2114 struct snd_pcm_substream *be_substream;
2115 struct snd_soc_dpcm *dpcm;
2116 int ret;
2117
2118 for_each_dpcm_be(fe, stream, dpcm) {
2119 struct snd_pcm_hw_params hw_params;
2120
2121 be = dpcm->be;
2122 be_substream = snd_soc_dpcm_get_substream(be, stream);
2123
2124 /* is this op for this BE ? */
2125 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2126 continue;
2127
2128 /* copy params for each dpcm */
2129 memcpy(&hw_params, &fe->dpcm[stream].hw_params,
2130 sizeof(struct snd_pcm_hw_params));
2131
2132 /* perform any hw_params fixups */
2133 ret = snd_soc_link_be_hw_params_fixup(be, &hw_params);
2134 if (ret < 0)
2135 goto unwind;
2136
2137 /* copy the fixed-up hw params for BE dai */
2138 memcpy(&be->dpcm[stream].hw_params, &hw_params,
2139 sizeof(struct snd_pcm_hw_params));
2140
2141 /* only allow hw_params() if no connected FEs are running */
2142 if (!snd_soc_dpcm_can_be_params(fe, be, stream))
2143 continue;
2144
2145 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2146 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2147 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
2148 continue;
2149
2150 dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
2151 be->dai_link->name);
2152
2153 ret = __soc_pcm_hw_params(be, be_substream, &hw_params);
2154 if (ret < 0)
2155 goto unwind;
2156
2157 be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2158 }
2159 return 0;
2160
2161 unwind:
2162 dev_dbg(fe->dev, "ASoC: %s() failed at %s (%d)\n",
2163 __func__, be->dai_link->name, ret);
2164
2165 /* disable any enabled and non active backends */
2166 for_each_dpcm_be_rollback(fe, stream, dpcm) {
2167 be = dpcm->be;
2168 be_substream = snd_soc_dpcm_get_substream(be, stream);
2169
2170 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2171 continue;
2172
2173 /* only allow hw_free() if no connected FEs are running */
2174 if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
2175 continue;
2176
2177 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
2178 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2179 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
2180 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
2181 continue;
2182
2183 __soc_pcm_hw_free(be, be_substream);
2184 }
2185
2186 return ret;
2187 }
2188
dpcm_fe_dai_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)2189 static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
2190 struct snd_pcm_hw_params *params)
2191 {
2192 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2193 int ret, stream = substream->stream;
2194
2195 snd_soc_dpcm_mutex_lock(fe);
2196 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2197
2198 memcpy(&fe->dpcm[stream].hw_params, params,
2199 sizeof(struct snd_pcm_hw_params));
2200 ret = dpcm_be_dai_hw_params(fe, stream);
2201 if (ret < 0)
2202 goto out;
2203
2204 dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
2205 fe->dai_link->name, params_rate(params),
2206 params_channels(params), params_format(params));
2207
2208 /* call hw_params on the frontend */
2209 ret = __soc_pcm_hw_params(fe, substream, params);
2210 if (ret < 0)
2211 dpcm_be_dai_hw_free(fe, stream);
2212 else
2213 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
2214
2215 out:
2216 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2217 snd_soc_dpcm_mutex_unlock(fe);
2218
2219 return soc_pcm_ret(fe, ret);
2220 }
2221
dpcm_be_dai_trigger(struct snd_soc_pcm_runtime * fe,int stream,int cmd)2222 int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
2223 int cmd)
2224 {
2225 struct snd_soc_pcm_runtime *be;
2226 bool pause_stop_transition;
2227 struct snd_soc_dpcm *dpcm;
2228 unsigned long flags;
2229 int ret = 0;
2230
2231 for_each_dpcm_be(fe, stream, dpcm) {
2232 struct snd_pcm_substream *be_substream;
2233
2234 be = dpcm->be;
2235 be_substream = snd_soc_dpcm_get_substream(be, stream);
2236
2237 snd_pcm_stream_lock_irqsave_nested(be_substream, flags);
2238
2239 /* is this op for this BE ? */
2240 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2241 goto next;
2242
2243 dev_dbg(be->dev, "ASoC: trigger BE %s cmd %d\n",
2244 be->dai_link->name, cmd);
2245
2246 switch (cmd) {
2247 case SNDRV_PCM_TRIGGER_START:
2248 if (!be->dpcm[stream].be_start &&
2249 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
2250 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2251 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2252 goto next;
2253
2254 be->dpcm[stream].be_start++;
2255 if (be->dpcm[stream].be_start != 1)
2256 goto next;
2257
2258 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_PAUSED)
2259 ret = soc_pcm_trigger(be_substream,
2260 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
2261 else
2262 ret = soc_pcm_trigger(be_substream,
2263 SNDRV_PCM_TRIGGER_START);
2264 if (ret) {
2265 be->dpcm[stream].be_start--;
2266 goto next;
2267 }
2268
2269 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2270 break;
2271 case SNDRV_PCM_TRIGGER_RESUME:
2272 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
2273 goto next;
2274
2275 be->dpcm[stream].be_start++;
2276 if (be->dpcm[stream].be_start != 1)
2277 goto next;
2278
2279 ret = soc_pcm_trigger(be_substream, cmd);
2280 if (ret) {
2281 be->dpcm[stream].be_start--;
2282 goto next;
2283 }
2284
2285 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2286 break;
2287 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2288 if (!be->dpcm[stream].be_start &&
2289 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2290 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2291 goto next;
2292
2293 fe->dpcm[stream].fe_pause = false;
2294 be->dpcm[stream].be_pause--;
2295
2296 be->dpcm[stream].be_start++;
2297 if (be->dpcm[stream].be_start != 1)
2298 goto next;
2299
2300 ret = soc_pcm_trigger(be_substream, cmd);
2301 if (ret) {
2302 be->dpcm[stream].be_start--;
2303 goto next;
2304 }
2305
2306 be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2307 break;
2308 case SNDRV_PCM_TRIGGER_STOP:
2309 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) &&
2310 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2311 goto next;
2312
2313 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2314 be->dpcm[stream].be_start--;
2315
2316 if (be->dpcm[stream].be_start != 0)
2317 goto next;
2318
2319 pause_stop_transition = false;
2320 if (fe->dpcm[stream].fe_pause) {
2321 pause_stop_transition = true;
2322 fe->dpcm[stream].fe_pause = false;
2323 be->dpcm[stream].be_pause--;
2324 }
2325
2326 if (be->dpcm[stream].be_pause != 0)
2327 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_PAUSE_PUSH);
2328 else
2329 ret = soc_pcm_trigger(be_substream, SNDRV_PCM_TRIGGER_STOP);
2330
2331 if (ret) {
2332 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_START)
2333 be->dpcm[stream].be_start++;
2334 if (pause_stop_transition) {
2335 fe->dpcm[stream].fe_pause = true;
2336 be->dpcm[stream].be_pause++;
2337 }
2338 goto next;
2339 }
2340
2341 if (be->dpcm[stream].be_pause != 0)
2342 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2343 else
2344 be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2345
2346 break;
2347 case SNDRV_PCM_TRIGGER_SUSPEND:
2348 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2349 goto next;
2350
2351 be->dpcm[stream].be_start--;
2352 if (be->dpcm[stream].be_start != 0)
2353 goto next;
2354
2355 ret = soc_pcm_trigger(be_substream, cmd);
2356 if (ret) {
2357 be->dpcm[stream].be_start++;
2358 goto next;
2359 }
2360
2361 be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND;
2362 break;
2363 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2364 if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
2365 goto next;
2366
2367 fe->dpcm[stream].fe_pause = true;
2368 be->dpcm[stream].be_pause++;
2369
2370 be->dpcm[stream].be_start--;
2371 if (be->dpcm[stream].be_start != 0)
2372 goto next;
2373
2374 ret = soc_pcm_trigger(be_substream, cmd);
2375 if (ret) {
2376 be->dpcm[stream].be_start++;
2377 goto next;
2378 }
2379
2380 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2381 break;
2382 }
2383 next:
2384 snd_pcm_stream_unlock_irqrestore(be_substream, flags);
2385 if (ret)
2386 break;
2387 }
2388 return soc_pcm_ret(fe, ret);
2389 }
2390 EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger);
2391
dpcm_dai_trigger_fe_be(struct snd_pcm_substream * substream,int cmd,bool fe_first)2392 static int dpcm_dai_trigger_fe_be(struct snd_pcm_substream *substream,
2393 int cmd, bool fe_first)
2394 {
2395 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2396 int ret;
2397
2398 /* call trigger on the frontend before the backend. */
2399 if (fe_first) {
2400 dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
2401 fe->dai_link->name, cmd);
2402
2403 ret = soc_pcm_trigger(substream, cmd);
2404 if (ret < 0)
2405 return ret;
2406
2407 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2408 return ret;
2409 }
2410
2411 /* call trigger on the frontend after the backend. */
2412 ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
2413 if (ret < 0)
2414 return ret;
2415
2416 dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
2417 fe->dai_link->name, cmd);
2418
2419 ret = soc_pcm_trigger(substream, cmd);
2420
2421 return ret;
2422 }
2423
dpcm_fe_dai_do_trigger(struct snd_pcm_substream * substream,int cmd)2424 static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd)
2425 {
2426 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2427 int stream = substream->stream;
2428 int ret = 0;
2429 enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
2430
2431 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
2432
2433 switch (trigger) {
2434 case SND_SOC_DPCM_TRIGGER_PRE:
2435 switch (cmd) {
2436 case SNDRV_PCM_TRIGGER_START:
2437 case SNDRV_PCM_TRIGGER_RESUME:
2438 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2439 case SNDRV_PCM_TRIGGER_DRAIN:
2440 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2441 break;
2442 case SNDRV_PCM_TRIGGER_STOP:
2443 case SNDRV_PCM_TRIGGER_SUSPEND:
2444 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2445 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2446 break;
2447 default:
2448 ret = -EINVAL;
2449 break;
2450 }
2451 break;
2452 case SND_SOC_DPCM_TRIGGER_POST:
2453 switch (cmd) {
2454 case SNDRV_PCM_TRIGGER_START:
2455 case SNDRV_PCM_TRIGGER_RESUME:
2456 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2457 case SNDRV_PCM_TRIGGER_DRAIN:
2458 ret = dpcm_dai_trigger_fe_be(substream, cmd, false);
2459 break;
2460 case SNDRV_PCM_TRIGGER_STOP:
2461 case SNDRV_PCM_TRIGGER_SUSPEND:
2462 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2463 ret = dpcm_dai_trigger_fe_be(substream, cmd, true);
2464 break;
2465 default:
2466 ret = -EINVAL;
2467 break;
2468 }
2469 break;
2470 default:
2471 dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
2472 fe->dai_link->name);
2473 ret = -EINVAL;
2474 goto out;
2475 }
2476
2477 if (ret < 0) {
2478 dev_err(fe->dev, "ASoC: trigger FE cmd: %d failed: %d\n",
2479 cmd, ret);
2480 goto out;
2481 }
2482
2483 switch (cmd) {
2484 case SNDRV_PCM_TRIGGER_START:
2485 case SNDRV_PCM_TRIGGER_RESUME:
2486 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
2487 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
2488 break;
2489 case SNDRV_PCM_TRIGGER_STOP:
2490 case SNDRV_PCM_TRIGGER_SUSPEND:
2491 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
2492 break;
2493 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
2494 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
2495 break;
2496 }
2497
2498 out:
2499 fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
2500 return ret;
2501 }
2502
dpcm_fe_dai_trigger(struct snd_pcm_substream * substream,int cmd)2503 static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd)
2504 {
2505 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2506 int stream = substream->stream;
2507
2508 /* if FE's runtime_update is already set, we're in race;
2509 * process this trigger later at exit
2510 */
2511 if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
2512 fe->dpcm[stream].trigger_pending = cmd + 1;
2513 return 0; /* delayed, assuming it's successful */
2514 }
2515
2516 /* we're alone, let's trigger */
2517 return dpcm_fe_dai_do_trigger(substream, cmd);
2518 }
2519
dpcm_be_dai_prepare(struct snd_soc_pcm_runtime * fe,int stream)2520 int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
2521 {
2522 struct snd_soc_dpcm *dpcm;
2523 int ret = 0;
2524
2525 for_each_dpcm_be(fe, stream, dpcm) {
2526
2527 struct snd_soc_pcm_runtime *be = dpcm->be;
2528 struct snd_pcm_substream *be_substream =
2529 snd_soc_dpcm_get_substream(be, stream);
2530
2531 /* is this op for this BE ? */
2532 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2533 continue;
2534
2535 if (!snd_soc_dpcm_can_be_prepared(fe, be, stream))
2536 continue;
2537
2538 if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
2539 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
2540 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND) &&
2541 (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
2542 continue;
2543
2544 dev_dbg(be->dev, "ASoC: prepare BE %s\n",
2545 be->dai_link->name);
2546
2547 ret = __soc_pcm_prepare(be, be_substream);
2548 if (ret < 0)
2549 break;
2550
2551 be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2552 }
2553
2554 /*
2555 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity
2556 *
2557 * We don't want to log an error since we do not want to give userspace a way to do a
2558 * denial-of-service attack on the syslog / diskspace.
2559 */
2560 return ret;
2561 }
2562
dpcm_fe_dai_prepare(struct snd_pcm_substream * substream)2563 static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
2564 {
2565 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(substream);
2566 int stream = substream->stream, ret = 0;
2567
2568 snd_soc_dpcm_mutex_lock(fe);
2569
2570 dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
2571
2572 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
2573
2574 /* there is no point preparing this FE if there are no BEs */
2575 if (list_empty(&fe->dpcm[stream].be_clients)) {
2576 /* dev_err_once() for visibility, dev_dbg() for debugging UCM profiles */
2577 dev_err_once(fe->dev, "ASoC: no backend DAIs enabled for %s, possibly missing ALSA mixer-based routing or UCM profile\n",
2578 fe->dai_link->name);
2579 dev_dbg(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
2580 fe->dai_link->name);
2581 ret = -EINVAL;
2582 goto out;
2583 }
2584
2585 ret = dpcm_be_dai_prepare(fe, stream);
2586 if (ret < 0)
2587 goto out;
2588
2589 /* call prepare on the frontend */
2590 ret = __soc_pcm_prepare(fe, substream);
2591 if (ret < 0)
2592 goto out;
2593
2594 fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
2595
2596 out:
2597 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2598 snd_soc_dpcm_mutex_unlock(fe);
2599
2600 /*
2601 * Don't use soc_pcm_ret() on .prepare callback to lower error log severity
2602 *
2603 * We don't want to log an error since we do not want to give userspace a way to do a
2604 * denial-of-service attack on the syslog / diskspace.
2605 */
2606 return ret;
2607 }
2608
dpcm_run_update_shutdown(struct snd_soc_pcm_runtime * fe,int stream)2609 static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
2610 {
2611 int err;
2612
2613 dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
2614 snd_pcm_direction_name(stream), fe->dai_link->name);
2615
2616 err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
2617
2618 dpcm_be_dai_hw_free(fe, stream);
2619
2620 dpcm_be_dai_shutdown(fe, stream);
2621
2622 /* run the stream event for each BE */
2623 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2624
2625 return soc_pcm_ret(fe, err);
2626 }
2627
dpcm_run_update_startup(struct snd_soc_pcm_runtime * fe,int stream)2628 static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
2629 {
2630 struct snd_soc_dpcm *dpcm;
2631 int ret = 0;
2632
2633 dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
2634 snd_pcm_direction_name(stream), fe->dai_link->name);
2635
2636 /* Only start the BE if the FE is ready */
2637 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
2638 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) {
2639 dev_err(fe->dev, "ASoC: FE %s is not ready %d\n",
2640 fe->dai_link->name, fe->dpcm[stream].state);
2641 ret = -EINVAL;
2642 goto disconnect;
2643 }
2644
2645 /* startup must always be called for new BEs */
2646 ret = dpcm_be_dai_startup(fe, stream);
2647 if (ret < 0)
2648 goto disconnect;
2649
2650 /* keep going if FE state is > open */
2651 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
2652 return 0;
2653
2654 ret = dpcm_be_dai_hw_params(fe, stream);
2655 if (ret < 0)
2656 goto close;
2657
2658 /* keep going if FE state is > hw_params */
2659 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
2660 return 0;
2661
2662 ret = dpcm_be_dai_prepare(fe, stream);
2663 if (ret < 0)
2664 goto hw_free;
2665
2666 /* run the stream event for each BE */
2667 dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
2668
2669 /* keep going if FE state is > prepare */
2670 if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
2671 fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
2672 return 0;
2673
2674 ret = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_START);
2675 if (ret < 0)
2676 goto hw_free;
2677
2678 return 0;
2679
2680 hw_free:
2681 dpcm_be_dai_hw_free(fe, stream);
2682 close:
2683 dpcm_be_dai_shutdown(fe, stream);
2684 disconnect:
2685 /* disconnect any pending BEs */
2686 for_each_dpcm_be(fe, stream, dpcm) {
2687 struct snd_soc_pcm_runtime *be = dpcm->be;
2688
2689 /* is this op for this BE ? */
2690 if (!snd_soc_dpcm_be_can_update(fe, be, stream))
2691 continue;
2692
2693 if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE ||
2694 be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW)
2695 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2696 }
2697
2698 return soc_pcm_ret(fe, ret);
2699 }
2700
soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime * fe,int new)2701 static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
2702 {
2703 struct snd_soc_dapm_widget_list *list;
2704 int stream;
2705 int count, paths;
2706
2707 if (!fe->dai_link->dynamic)
2708 return 0;
2709
2710 if (fe->dai_link->num_cpus > 1) {
2711 dev_err(fe->dev,
2712 "%s doesn't support Multi CPU yet\n", __func__);
2713 return -EINVAL;
2714 }
2715
2716 /* only check active links */
2717 if (!snd_soc_dai_active(snd_soc_rtd_to_cpu(fe, 0)))
2718 return 0;
2719
2720 /* DAPM sync will call this to update DSP paths */
2721 dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
2722 new ? "new" : "old", fe->dai_link->name);
2723
2724 for_each_pcm_streams(stream) {
2725
2726 /* skip if FE doesn't have playback/capture capability */
2727 if (!snd_soc_dai_stream_valid(snd_soc_rtd_to_cpu(fe, 0), stream) ||
2728 !snd_soc_dai_stream_valid(snd_soc_rtd_to_codec(fe, 0), stream))
2729 continue;
2730
2731 /* skip if FE isn't currently playing/capturing */
2732 if (!snd_soc_dai_stream_active(snd_soc_rtd_to_cpu(fe, 0), stream) ||
2733 !snd_soc_dai_stream_active(snd_soc_rtd_to_codec(fe, 0), stream))
2734 continue;
2735
2736 paths = dpcm_path_get(fe, stream, &list);
2737 if (paths < 0)
2738 return paths;
2739
2740 /* update any playback/capture paths */
2741 count = dpcm_process_paths(fe, stream, &list, new);
2742 if (count) {
2743 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
2744 if (new)
2745 dpcm_run_update_startup(fe, stream);
2746 else
2747 dpcm_run_update_shutdown(fe, stream);
2748 dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
2749
2750 dpcm_clear_pending_state(fe, stream);
2751 dpcm_be_disconnect(fe, stream);
2752 }
2753
2754 dpcm_path_put(&list);
2755 }
2756
2757 return 0;
2758 }
2759
2760 /* Called by DAPM mixer/mux changes to update audio routing between PCMs and
2761 * any DAI links.
2762 */
snd_soc_dpcm_runtime_update(struct snd_soc_card * card)2763 int snd_soc_dpcm_runtime_update(struct snd_soc_card *card)
2764 {
2765 struct snd_soc_pcm_runtime *fe;
2766 int ret = 0;
2767
2768 snd_soc_dpcm_mutex_lock(card);
2769 /* shutdown all old paths first */
2770 for_each_card_rtds(card, fe) {
2771 ret = soc_dpcm_fe_runtime_update(fe, 0);
2772 if (ret)
2773 goto out;
2774 }
2775
2776 /* bring new paths up */
2777 for_each_card_rtds(card, fe) {
2778 ret = soc_dpcm_fe_runtime_update(fe, 1);
2779 if (ret)
2780 goto out;
2781 }
2782
2783 out:
2784 snd_soc_dpcm_mutex_unlock(card);
2785 return ret;
2786 }
2787 EXPORT_SYMBOL_GPL(snd_soc_dpcm_runtime_update);
2788
dpcm_fe_dai_cleanup(struct snd_pcm_substream * fe_substream)2789 static void dpcm_fe_dai_cleanup(struct snd_pcm_substream *fe_substream)
2790 {
2791 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream);
2792 struct snd_soc_dpcm *dpcm;
2793 int stream = fe_substream->stream;
2794
2795 snd_soc_dpcm_mutex_assert_held(fe);
2796
2797 /* mark FE's links ready to prune */
2798 for_each_dpcm_be(fe, stream, dpcm)
2799 dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
2800
2801 dpcm_be_disconnect(fe, stream);
2802 }
2803
dpcm_fe_dai_close(struct snd_pcm_substream * fe_substream)2804 static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream)
2805 {
2806 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream);
2807 int ret;
2808
2809 snd_soc_dpcm_mutex_lock(fe);
2810 ret = dpcm_fe_dai_shutdown(fe_substream);
2811
2812 dpcm_fe_dai_cleanup(fe_substream);
2813
2814 snd_soc_dpcm_mutex_unlock(fe);
2815 return ret;
2816 }
2817
dpcm_fe_dai_open(struct snd_pcm_substream * fe_substream)2818 static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
2819 {
2820 struct snd_soc_pcm_runtime *fe = snd_soc_substream_to_rtd(fe_substream);
2821 struct snd_soc_dapm_widget_list *list;
2822 int ret;
2823 int stream = fe_substream->stream;
2824
2825 snd_soc_dpcm_mutex_lock(fe);
2826
2827 ret = dpcm_path_get(fe, stream, &list);
2828 if (ret < 0)
2829 goto open_end;
2830
2831 /* calculate valid and active FE <-> BE dpcms */
2832 dpcm_process_paths(fe, stream, &list, 1);
2833
2834 ret = dpcm_fe_dai_startup(fe_substream);
2835 if (ret < 0)
2836 dpcm_fe_dai_cleanup(fe_substream);
2837
2838 dpcm_clear_pending_state(fe, stream);
2839 dpcm_path_put(&list);
2840 open_end:
2841 snd_soc_dpcm_mutex_unlock(fe);
2842 return ret;
2843 }
2844
soc_get_playback_capture(struct snd_soc_pcm_runtime * rtd,int * playback,int * capture)2845 static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd,
2846 int *playback, int *capture)
2847 {
2848 struct snd_soc_dai_link *dai_link = rtd->dai_link;
2849 struct snd_soc_dai *cpu_dai;
2850 struct snd_soc_dai *codec_dai;
2851 struct snd_soc_dai_link_ch_map *ch_maps;
2852 struct snd_soc_dai *dummy_dai = snd_soc_find_dai(&snd_soc_dummy_dlc);
2853 int cpu_capture;
2854 int cpu_playback;
2855 int has_playback = 0;
2856 int has_capture = 0;
2857 int i;
2858
2859 if (dai_link->dynamic && dai_link->num_cpus > 1) {
2860 dev_err(rtd->dev, "DPCM doesn't support Multi CPU for Front-Ends yet\n");
2861 return -EINVAL;
2862 }
2863
2864 /* Adapt stream for codec2codec links */
2865 cpu_capture = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_CAPTURE);
2866 cpu_playback = snd_soc_get_stream_cpu(dai_link, SNDRV_PCM_STREAM_PLAYBACK);
2867
2868 /*
2869 * see
2870 * soc.h :: [dai_link->ch_maps Image sample]
2871 */
2872 for_each_rtd_ch_maps(rtd, i, ch_maps) {
2873 cpu_dai = snd_soc_rtd_to_cpu(rtd, ch_maps->cpu);
2874 codec_dai = snd_soc_rtd_to_codec(rtd, ch_maps->codec);
2875
2876 /*
2877 * FIXME
2878 *
2879 * DPCM Codec has been no checked before.
2880 * It should be checked, but it breaks compatibility.
2881 *
2882 * For example there is a case that CPU have loopback capabilities which is used
2883 * for tests on boards where the Codec has no capture capabilities. In this case,
2884 * Codec capture validation check will be fail, but system should allow capture
2885 * capabilities. We have no solution for it today.
2886 */
2887 if (dai_link->dynamic || dai_link->no_pcm)
2888 codec_dai = dummy_dai;
2889
2890 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
2891 snd_soc_dai_stream_valid(cpu_dai, cpu_playback))
2892 has_playback = 1;
2893 if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
2894 snd_soc_dai_stream_valid(cpu_dai, cpu_capture))
2895 has_capture = 1;
2896 }
2897
2898 if (dai_link->playback_only)
2899 has_capture = 0;
2900
2901 if (dai_link->capture_only)
2902 has_playback = 0;
2903
2904 if (!has_playback && !has_capture) {
2905 dev_err(rtd->dev, "substream %s has no playback, no capture\n",
2906 dai_link->stream_name);
2907
2908 return -EINVAL;
2909 }
2910
2911 *playback = has_playback;
2912 *capture = has_capture;
2913
2914 return 0;
2915 }
2916
soc_create_pcm(struct snd_pcm ** pcm,struct snd_soc_pcm_runtime * rtd,int playback,int capture)2917 static int soc_create_pcm(struct snd_pcm **pcm,
2918 struct snd_soc_pcm_runtime *rtd,
2919 int playback, int capture)
2920 {
2921 char new_name[64];
2922 int ret;
2923
2924 /* create the PCM */
2925 if (rtd->dai_link->c2c_params) {
2926 snprintf(new_name, sizeof(new_name), "codec2codec(%s)",
2927 rtd->dai_link->stream_name);
2928
2929 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, rtd->id,
2930 playback, capture, pcm);
2931 } else if (rtd->dai_link->no_pcm) {
2932 snprintf(new_name, sizeof(new_name), "(%s)",
2933 rtd->dai_link->stream_name);
2934
2935 ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, rtd->id,
2936 playback, capture, pcm);
2937 } else {
2938 if (rtd->dai_link->dynamic)
2939 snprintf(new_name, sizeof(new_name), "%s (*)",
2940 rtd->dai_link->stream_name);
2941 else
2942 snprintf(new_name, sizeof(new_name), "%s %s-%d",
2943 rtd->dai_link->stream_name,
2944 soc_codec_dai_name(rtd), rtd->id);
2945
2946 ret = snd_pcm_new(rtd->card->snd_card, new_name, rtd->id, playback,
2947 capture, pcm);
2948 }
2949 if (ret < 0) {
2950 dev_err(rtd->card->dev, "ASoC: can't create pcm %s for dailink %s: %d\n",
2951 new_name, rtd->dai_link->name, ret);
2952 return ret;
2953 }
2954 dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n", rtd->id, new_name);
2955
2956 return 0;
2957 }
2958
2959 /* create a new pcm */
soc_new_pcm(struct snd_soc_pcm_runtime * rtd)2960 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd)
2961 {
2962 struct snd_soc_component *component;
2963 struct snd_pcm *pcm;
2964 int ret = 0, playback = 0, capture = 0;
2965 int i;
2966
2967 ret = soc_get_playback_capture(rtd, &playback, &capture);
2968 if (ret < 0)
2969 return ret;
2970
2971 ret = soc_create_pcm(&pcm, rtd, playback, capture);
2972 if (ret < 0)
2973 return ret;
2974
2975 /* DAPM dai link stream work */
2976 /*
2977 * Currently nothing to do for c2c links
2978 * Since c2c links are internal nodes in the DAPM graph and
2979 * don't interface with the outside world or application layer
2980 * we don't have to do any special handling on close.
2981 */
2982 if (!rtd->dai_link->c2c_params)
2983 rtd->close_delayed_work_func = snd_soc_close_delayed_work;
2984
2985 rtd->pcm = pcm;
2986 pcm->nonatomic = rtd->dai_link->nonatomic;
2987 pcm->private_data = rtd;
2988 pcm->no_device_suspend = true;
2989
2990 if (rtd->dai_link->no_pcm || rtd->dai_link->c2c_params) {
2991 if (playback)
2992 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
2993 if (capture)
2994 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
2995 goto out;
2996 }
2997
2998 /* ASoC PCM operations */
2999 if (rtd->dai_link->dynamic) {
3000 rtd->ops.open = dpcm_fe_dai_open;
3001 rtd->ops.hw_params = dpcm_fe_dai_hw_params;
3002 rtd->ops.prepare = dpcm_fe_dai_prepare;
3003 rtd->ops.trigger = dpcm_fe_dai_trigger;
3004 rtd->ops.hw_free = dpcm_fe_dai_hw_free;
3005 rtd->ops.close = dpcm_fe_dai_close;
3006 rtd->ops.pointer = soc_pcm_pointer;
3007 } else {
3008 rtd->ops.open = soc_pcm_open;
3009 rtd->ops.hw_params = soc_pcm_hw_params;
3010 rtd->ops.prepare = soc_pcm_prepare;
3011 rtd->ops.trigger = soc_pcm_trigger;
3012 rtd->ops.hw_free = soc_pcm_hw_free;
3013 rtd->ops.close = soc_pcm_close;
3014 rtd->ops.pointer = soc_pcm_pointer;
3015 }
3016
3017 for_each_rtd_components(rtd, i, component) {
3018 const struct snd_soc_component_driver *drv = component->driver;
3019
3020 if (drv->ioctl)
3021 rtd->ops.ioctl = snd_soc_pcm_component_ioctl;
3022 if (drv->sync_stop)
3023 rtd->ops.sync_stop = snd_soc_pcm_component_sync_stop;
3024 if (drv->copy)
3025 rtd->ops.copy = snd_soc_pcm_component_copy;
3026 if (drv->page)
3027 rtd->ops.page = snd_soc_pcm_component_page;
3028 if (drv->mmap)
3029 rtd->ops.mmap = snd_soc_pcm_component_mmap;
3030 if (drv->ack)
3031 rtd->ops.ack = snd_soc_pcm_component_ack;
3032 }
3033
3034 if (playback)
3035 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
3036
3037 if (capture)
3038 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
3039
3040 ret = snd_soc_pcm_component_new(rtd);
3041 if (ret < 0)
3042 return ret;
3043 out:
3044 dev_dbg(rtd->card->dev, "%s <-> %s mapping ok\n",
3045 soc_codec_dai_name(rtd), soc_cpu_dai_name(rtd));
3046 return ret;
3047 }
3048
3049 /* get the substream for this BE */
3050 struct snd_pcm_substream *
snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime * be,int stream)3051 snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
3052 {
3053 return be->pcm->streams[stream].substream;
3054 }
3055 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
3056