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drm/panthor: Don't add write fences to the shared BOs
[drm/drm-misc.git] / sound / soc / soc-core.c
blob20248a29d1674abc85d64fa7ea1cd1aefaad1d8a
1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // soc-core.c -- ALSA SoC Audio Layer
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 // Author: Liam Girdwood <lrg@slimlogic.co.uk>
11 // with code, comments and ideas from :-
12 // Richard Purdie <richard@openedhand.com>
13 //
14 // TODO:
15 // o Add hw rules to enforce rates, etc.
16 // o More testing with other codecs/machines.
17 // o Add more codecs and platforms to ensure good API coverage.
18 // o Support TDM on PCM and I2S
19
20 #include <linux/module.h>
21 #include <linux/moduleparam.h>
22 #include <linux/init.h>
23 #include <linux/delay.h>
24 #include <linux/pm.h>
25 #include <linux/bitops.h>
26 #include <linux/debugfs.h>
27 #include <linux/platform_device.h>
28 #include <linux/pinctrl/consumer.h>
29 #include <linux/ctype.h>
30 #include <linux/slab.h>
31 #include <linux/of.h>
32 #include <linux/of_graph.h>
33 #include <linux/dmi.h>
34 #include <linux/acpi.h>
35 #include <sound/core.h>
36 #include <sound/pcm.h>
37 #include <sound/pcm_params.h>
38 #include <sound/soc.h>
39 #include <sound/soc-dpcm.h>
40 #include <sound/soc-topology.h>
41 #include <sound/soc-link.h>
42 #include <sound/initval.h>
43
44 #define CREATE_TRACE_POINTS
45 #include <trace/events/asoc.h>
46
47 static DEFINE_MUTEX(client_mutex);
48 static LIST_HEAD(component_list);
49 static LIST_HEAD(unbind_card_list);
50
51 #define for_each_component(component) \
52 list_for_each_entry(component, &component_list, list)
53
54 /*
55 * This is used if driver don't need to have CPU/Codec/Platform
56 * dai_link. see soc.h
57 */
58 struct snd_soc_dai_link_component null_dailink_component[0];
59 EXPORT_SYMBOL_GPL(null_dailink_component);
60
61 /*
62 * This is a timeout to do a DAPM powerdown after a stream is closed().
63 * It can be used to eliminate pops between different playback streams, e.g.
64 * between two audio tracks.
65 */
66 static int pmdown_time = 5000;
67 module_param(pmdown_time, int, 0);
68 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
69
70 static ssize_t pmdown_time_show(struct device *dev,
71 struct device_attribute *attr, char *buf)
72 {
73 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
74
75 return sysfs_emit(buf, "%ld\n", rtd->pmdown_time);
76 }
77
78 static ssize_t pmdown_time_store(struct device *dev,
79 struct device_attribute *attr,
80 const char *buf, size_t count)
81 {
82 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
83 int ret;
84
85 ret = kstrtol(buf, 10, &rtd->pmdown_time);
86 if (ret)
87 return ret;
88
89 return count;
90 }
91
92 static DEVICE_ATTR_RW(pmdown_time);
93
94 static struct attribute *soc_dev_attrs[] = {
95 &dev_attr_pmdown_time.attr,
96 NULL
97 };
98
99 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
100 struct attribute *attr, int idx)
101 {
102 struct device *dev = kobj_to_dev(kobj);
103 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
104
105 if (!rtd)
106 return 0;
107
108 if (attr == &dev_attr_pmdown_time.attr)
109 return attr->mode; /* always visible */
110 return rtd->dai_link->num_codecs ? attr->mode : 0; /* enabled only with codec */
111 }
112
113 static const struct attribute_group soc_dapm_dev_group = {
114 .attrs = soc_dapm_dev_attrs,
115 .is_visible = soc_dev_attr_is_visible,
116 };
117
118 static const struct attribute_group soc_dev_group = {
119 .attrs = soc_dev_attrs,
120 .is_visible = soc_dev_attr_is_visible,
121 };
122
123 static const struct attribute_group *soc_dev_attr_groups[] = {
124 &soc_dapm_dev_group,
125 &soc_dev_group,
126 NULL
127 };
128
129 #ifdef CONFIG_DEBUG_FS
130 struct dentry *snd_soc_debugfs_root;
131 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
132
133 static void soc_init_component_debugfs(struct snd_soc_component *component)
134 {
135 if (!component->card->debugfs_card_root)
136 return;
137
138 if (component->debugfs_prefix) {
139 char *name;
140
141 name = kasprintf(GFP_KERNEL, "%s:%s",
142 component->debugfs_prefix, component->name);
143 if (name) {
144 component->debugfs_root = debugfs_create_dir(name,
145 component->card->debugfs_card_root);
146 kfree(name);
147 }
148 } else {
149 component->debugfs_root = debugfs_create_dir(component->name,
150 component->card->debugfs_card_root);
151 }
152
153 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
154 component->debugfs_root);
155 }
156
157 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
158 {
159 if (!component->debugfs_root)
160 return;
161 debugfs_remove_recursive(component->debugfs_root);
162 component->debugfs_root = NULL;
163 }
164
165 static int dai_list_show(struct seq_file *m, void *v)
166 {
167 struct snd_soc_component *component;
168 struct snd_soc_dai *dai;
169
170 mutex_lock(&client_mutex);
171
172 for_each_component(component)
173 for_each_component_dais(component, dai)
174 seq_printf(m, "%s\n", dai->name);
175
176 mutex_unlock(&client_mutex);
177
178 return 0;
179 }
180 DEFINE_SHOW_ATTRIBUTE(dai_list);
181
182 static int component_list_show(struct seq_file *m, void *v)
183 {
184 struct snd_soc_component *component;
185
186 mutex_lock(&client_mutex);
187
188 for_each_component(component)
189 seq_printf(m, "%s\n", component->name);
190
191 mutex_unlock(&client_mutex);
192
193 return 0;
194 }
195 DEFINE_SHOW_ATTRIBUTE(component_list);
196
197 static void soc_init_card_debugfs(struct snd_soc_card *card)
198 {
199 card->debugfs_card_root = debugfs_create_dir(card->name,
200 snd_soc_debugfs_root);
201
202 debugfs_create_u32("dapm_pop_time", 0644, card->debugfs_card_root,
203 &card->pop_time);
204
205 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
206 }
207
208 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
209 {
210 debugfs_remove_recursive(card->debugfs_card_root);
211 card->debugfs_card_root = NULL;
212 }
213
214 static void snd_soc_debugfs_init(void)
215 {
216 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
217
218 debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
219 &dai_list_fops);
220
221 debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
222 &component_list_fops);
223 }
224
225 static void snd_soc_debugfs_exit(void)
226 {
227 debugfs_remove_recursive(snd_soc_debugfs_root);
228 }
229
230 #else
231
232 static inline void soc_init_component_debugfs(struct snd_soc_component *component) { }
233 static inline void soc_cleanup_component_debugfs(struct snd_soc_component *component) { }
234 static inline void soc_init_card_debugfs(struct snd_soc_card *card) { }
235 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card) { }
236 static inline void snd_soc_debugfs_init(void) { }
237 static inline void snd_soc_debugfs_exit(void) { }
238
239 #endif
240
241 static int snd_soc_is_match_dai_args(const struct of_phandle_args *args1,
242 const struct of_phandle_args *args2)
243 {
244 if (!args1 || !args2)
245 return 0;
246
247 if (args1->np != args2->np)
248 return 0;
249
250 for (int i = 0; i < args1->args_count; i++)
251 if (args1->args[i] != args2->args[i])
252 return 0;
253
254 return 1;
255 }
256
257 static inline int snd_soc_dlc_component_is_empty(struct snd_soc_dai_link_component *dlc)
258 {
259 return !(dlc->dai_args || dlc->name || dlc->of_node);
260 }
261
262 static inline int snd_soc_dlc_component_is_invalid(struct snd_soc_dai_link_component *dlc)
263 {
264 return (dlc->name && dlc->of_node);
265 }
266
267 static inline int snd_soc_dlc_dai_is_empty(struct snd_soc_dai_link_component *dlc)
268 {
269 return !(dlc->dai_args || dlc->dai_name);
270 }
271
272 static int snd_soc_is_matching_dai(const struct snd_soc_dai_link_component *dlc,
273 struct snd_soc_dai *dai)
274 {
275 if (!dlc)
276 return 0;
277
278 if (dlc->dai_args)
279 return snd_soc_is_match_dai_args(dai->driver->dai_args, dlc->dai_args);
280
281 if (!dlc->dai_name)
282 return 1;
283
284 /* see snd_soc_dai_name_get() */
285
286 if (dai->driver->name &&
287 strcmp(dlc->dai_name, dai->driver->name) == 0)
288 return 1;
289
290 if (strcmp(dlc->dai_name, dai->name) == 0)
291 return 1;
292
293 if (dai->component->name &&
294 strcmp(dlc->dai_name, dai->component->name) == 0)
295 return 1;
296
297 return 0;
298 }
299
300 const char *snd_soc_dai_name_get(const struct snd_soc_dai *dai)
301 {
302 /* see snd_soc_is_matching_dai() */
303 if (dai->driver->name)
304 return dai->driver->name;
305
306 if (dai->name)
307 return dai->name;
308
309 if (dai->component->name)
310 return dai->component->name;
311
312 return NULL;
313 }
314 EXPORT_SYMBOL_GPL(snd_soc_dai_name_get);
315
316 static int snd_soc_rtd_add_component(struct snd_soc_pcm_runtime *rtd,
317 struct snd_soc_component *component)
318 {
319 struct snd_soc_component *comp;
320 int i;
321
322 for_each_rtd_components(rtd, i, comp) {
323 /* already connected */
324 if (comp == component)
325 return 0;
326 }
327
328 /* see for_each_rtd_components */
329 rtd->num_components++; // increment flex array count at first
330 rtd->components[rtd->num_components - 1] = component;
331
332 return 0;
333 }
334
335 struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
336 const char *driver_name)
337 {
338 struct snd_soc_component *component;
339 int i;
340
341 if (!driver_name)
342 return NULL;
343
344 /*
345 * NOTE
346 *
347 * snd_soc_rtdcom_lookup() will find component from rtd by using
348 * specified driver name.
349 * But, if many components which have same driver name are connected
350 * to 1 rtd, this function will return 1st found component.
351 */
352 for_each_rtd_components(rtd, i, component) {
353 const char *component_name = component->driver->name;
354
355 if (!component_name)
356 continue;
357
358 if ((component_name == driver_name) ||
359 strcmp(component_name, driver_name) == 0)
360 return component;
361 }
362
363 return NULL;
364 }
365 EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
366
367 struct snd_soc_component
368 *snd_soc_lookup_component_nolocked(struct device *dev, const char *driver_name)
369 {
370 struct snd_soc_component *component;
371 struct snd_soc_component *found_component;
372
373 found_component = NULL;
374 for_each_component(component) {
375 if ((dev == component->dev) &&
376 (!driver_name ||
377 (driver_name == component->driver->name) ||
378 (strcmp(component->driver->name, driver_name) == 0))) {
379 found_component = component;
380 break;
381 }
382 }
383
384 return found_component;
385 }
386 EXPORT_SYMBOL_GPL(snd_soc_lookup_component_nolocked);
387
388 struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
389 const char *driver_name)
390 {
391 struct snd_soc_component *component;
392
393 mutex_lock(&client_mutex);
394 component = snd_soc_lookup_component_nolocked(dev, driver_name);
395 mutex_unlock(&client_mutex);
396
397 return component;
398 }
399 EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
400
401 struct snd_soc_pcm_runtime
402 *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
403 struct snd_soc_dai_link *dai_link)
404 {
405 struct snd_soc_pcm_runtime *rtd;
406
407 for_each_card_rtds(card, rtd) {
408 if (rtd->dai_link == dai_link)
409 return rtd;
410 }
411 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link->name);
412 return NULL;
413 }
414 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
415
416 /*
417 * Power down the audio subsystem pmdown_time msecs after close is called.
418 * This is to ensure there are no pops or clicks in between any music tracks
419 * due to DAPM power cycling.
420 */
421 void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
422 {
423 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
424 int playback = SNDRV_PCM_STREAM_PLAYBACK;
425
426 snd_soc_dpcm_mutex_lock(rtd);
427
428 dev_dbg(rtd->dev,
429 "ASoC: pop wq checking: %s status: %s waiting: %s\n",
430 codec_dai->driver->playback.stream_name,
431 snd_soc_dai_stream_active(codec_dai, playback) ?
432 "active" : "inactive",
433 rtd->pop_wait ? "yes" : "no");
434
435 /* are we waiting on this codec DAI stream */
436 if (rtd->pop_wait == 1) {
437 rtd->pop_wait = 0;
438 snd_soc_dapm_stream_event(rtd, playback,
439 SND_SOC_DAPM_STREAM_STOP);
440 }
441
442 snd_soc_dpcm_mutex_unlock(rtd);
443 }
444 EXPORT_SYMBOL_GPL(snd_soc_close_delayed_work);
445
446 static void soc_release_rtd_dev(struct device *dev)
447 {
448 /* "dev" means "rtd->dev" */
449 kfree(dev);
450 }
451
452 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
453 {
454 if (!rtd)
455 return;
456
457 list_del(&rtd->list);
458
459 if (delayed_work_pending(&rtd->delayed_work))
460 flush_delayed_work(&rtd->delayed_work);
461 snd_soc_pcm_component_free(rtd);
462
463 /*
464 * we don't need to call kfree() for rtd->dev
465 * see
466 * soc_release_rtd_dev()
467 *
468 * We don't need rtd->dev NULL check, because
469 * it is alloced *before* rtd.
470 * see
471 * soc_new_pcm_runtime()
472 *
473 * We don't need to mind freeing for rtd,
474 * because it was created from dev (= rtd->dev)
475 * see
476 * soc_new_pcm_runtime()
477 *
478 * rtd = devm_kzalloc(dev, ...);
479 * rtd->dev = dev
480 */
481 device_unregister(rtd->dev);
482 }
483
484 static void close_delayed_work(struct work_struct *work) {
485 struct snd_soc_pcm_runtime *rtd =
486 container_of(work, struct snd_soc_pcm_runtime,
487 delayed_work.work);
488
489 if (rtd->close_delayed_work_func)
490 rtd->close_delayed_work_func(rtd);
491 }
492
493 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
494 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
495 {
496 struct snd_soc_pcm_runtime *rtd;
497 struct device *dev;
498 int ret;
499 int stream;
500
501 /*
502 * for rtd->dev
503 */
504 dev = kzalloc(sizeof(struct device), GFP_KERNEL);
505 if (!dev)
506 return NULL;
507
508 dev->parent = card->dev;
509 dev->release = soc_release_rtd_dev;
510
511 dev_set_name(dev, "%s", dai_link->name);
512
513 ret = device_register(dev);
514 if (ret < 0) {
515 put_device(dev); /* soc_release_rtd_dev */
516 return NULL;
517 }
518
519 /*
520 * for rtd
521 */
522 rtd = devm_kzalloc(dev,
523 struct_size(rtd, components,
524 dai_link->num_cpus +
525 dai_link->num_codecs +
526 dai_link->num_platforms),
527 GFP_KERNEL);
528 if (!rtd) {
529 device_unregister(dev);
530 return NULL;
531 }
532
533 rtd->dev = dev;
534 INIT_LIST_HEAD(&rtd->list);
535 for_each_pcm_streams(stream) {
536 INIT_LIST_HEAD(&rtd->dpcm[stream].be_clients);
537 INIT_LIST_HEAD(&rtd->dpcm[stream].fe_clients);
538 }
539 dev_set_drvdata(dev, rtd);
540 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
541
542 /*
543 * for rtd->dais
544 */
545 rtd->dais = devm_kcalloc(dev, dai_link->num_cpus + dai_link->num_codecs,
546 sizeof(struct snd_soc_dai *),
547 GFP_KERNEL);
548 if (!rtd->dais)
549 goto free_rtd;
550
551 /*
552 * dais = [][][][][][][][][][][][][][][][][][]
553 * ^cpu_dais ^codec_dais
554 * |--- num_cpus ---|--- num_codecs --|
555 * see
556 * snd_soc_rtd_to_cpu()
557 * snd_soc_rtd_to_codec()
558 */
559 rtd->card = card;
560 rtd->dai_link = dai_link;
561 rtd->num = card->num_rtd++;
562 rtd->pmdown_time = pmdown_time; /* default power off timeout */
563
564 /* see for_each_card_rtds */
565 list_add_tail(&rtd->list, &card->rtd_list);
566
567 ret = device_add_groups(dev, soc_dev_attr_groups);
568 if (ret < 0)
569 goto free_rtd;
570
571 return rtd;
572
573 free_rtd:
574 soc_free_pcm_runtime(rtd);
575 return NULL;
576 }
577
578 static void snd_soc_fill_dummy_dai(struct snd_soc_card *card)
579 {
580 struct snd_soc_dai_link *dai_link;
581 int i;
582
583 /*
584 * COMP_DUMMY() creates size 0 array on dai_link.
585 * Fill it as dummy DAI in case of CPU/Codec here.
586 * Do nothing for Platform.
587 */
588 for_each_card_prelinks(card, i, dai_link) {
589 if (dai_link->num_cpus == 0 && dai_link->cpus) {
590 dai_link->num_cpus = 1;
591 dai_link->cpus = &snd_soc_dummy_dlc;
592 }
593 if (dai_link->num_codecs == 0 && dai_link->codecs) {
594 dai_link->num_codecs = 1;
595 dai_link->codecs = &snd_soc_dummy_dlc;
596 }
597 }
598 }
599
600 static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
601 {
602 struct snd_soc_pcm_runtime *rtd;
603
604 for_each_card_rtds(card, rtd)
605 flush_delayed_work(&rtd->delayed_work);
606 }
607
608 #ifdef CONFIG_PM_SLEEP
609 static void soc_playback_digital_mute(struct snd_soc_card *card, int mute)
610 {
611 struct snd_soc_pcm_runtime *rtd;
612 struct snd_soc_dai *dai;
613 int playback = SNDRV_PCM_STREAM_PLAYBACK;
614 int i;
615
616 for_each_card_rtds(card, rtd) {
617
618 if (rtd->dai_link->ignore_suspend)
619 continue;
620
621 for_each_rtd_dais(rtd, i, dai) {
622 if (snd_soc_dai_stream_active(dai, playback))
623 snd_soc_dai_digital_mute(dai, mute, playback);
624 }
625 }
626 }
627
628 static void soc_dapm_suspend_resume(struct snd_soc_card *card, int event)
629 {
630 struct snd_soc_pcm_runtime *rtd;
631 int stream;
632
633 for_each_card_rtds(card, rtd) {
634
635 if (rtd->dai_link->ignore_suspend)
636 continue;
637
638 for_each_pcm_streams(stream)
639 snd_soc_dapm_stream_event(rtd, stream, event);
640 }
641 }
642
643 /* powers down audio subsystem for suspend */
644 int snd_soc_suspend(struct device *dev)
645 {
646 struct snd_soc_card *card = dev_get_drvdata(dev);
647 struct snd_soc_component *component;
648 struct snd_soc_pcm_runtime *rtd;
649 int i;
650
651 /* If the card is not initialized yet there is nothing to do */
652 if (!snd_soc_card_is_instantiated(card))
653 return 0;
654
655 /*
656 * Due to the resume being scheduled into a workqueue we could
657 * suspend before that's finished - wait for it to complete.
658 */
659 snd_power_wait(card->snd_card);
660
661 /* we're going to block userspace touching us until resume completes */
662 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
663
664 /* mute any active DACs */
665 soc_playback_digital_mute(card, 1);
666
667 /* suspend all pcms */
668 for_each_card_rtds(card, rtd) {
669 if (rtd->dai_link->ignore_suspend)
670 continue;
671
672 snd_pcm_suspend_all(rtd->pcm);
673 }
674
675 snd_soc_card_suspend_pre(card);
676
677 /* close any waiting streams */
678 snd_soc_flush_all_delayed_work(card);
679
680 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_SUSPEND);
681
682 /* Recheck all endpoints too, their state is affected by suspend */
683 dapm_mark_endpoints_dirty(card);
684 snd_soc_dapm_sync(&card->dapm);
685
686 /* suspend all COMPONENTs */
687 for_each_card_rtds(card, rtd) {
688
689 if (rtd->dai_link->ignore_suspend)
690 continue;
691
692 for_each_rtd_components(rtd, i, component) {
693 struct snd_soc_dapm_context *dapm =
694 snd_soc_component_get_dapm(component);
695
696 /*
697 * ignore if component was already suspended
698 */
699 if (snd_soc_component_is_suspended(component))
700 continue;
701
702 /*
703 * If there are paths active then the COMPONENT will be
704 * held with bias _ON and should not be suspended.
705 */
706 switch (snd_soc_dapm_get_bias_level(dapm)) {
707 case SND_SOC_BIAS_STANDBY:
708 /*
709 * If the COMPONENT is capable of idle
710 * bias off then being in STANDBY
711 * means it's doing something,
712 * otherwise fall through.
713 */
714 if (dapm->idle_bias_off) {
715 dev_dbg(component->dev,
716 "ASoC: idle_bias_off CODEC on over suspend\n");
717 break;
718 }
719 fallthrough;
720
721 case SND_SOC_BIAS_OFF:
722 snd_soc_component_suspend(component);
723 if (component->regmap)
724 regcache_mark_dirty(component->regmap);
725 /* deactivate pins to sleep state */
726 pinctrl_pm_select_sleep_state(component->dev);
727 break;
728 default:
729 dev_dbg(component->dev,
730 "ASoC: COMPONENT is on over suspend\n");
731 break;
732 }
733 }
734 }
735
736 snd_soc_card_suspend_post(card);
737
738 return 0;
739 }
740 EXPORT_SYMBOL_GPL(snd_soc_suspend);
741
742 /*
743 * deferred resume work, so resume can complete before we finished
744 * setting our codec back up, which can be very slow on I2C
745 */
746 static void soc_resume_deferred(struct work_struct *work)
747 {
748 struct snd_soc_card *card =
749 container_of(work, struct snd_soc_card,
750 deferred_resume_work);
751 struct snd_soc_component *component;
752
753 /*
754 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
755 * so userspace apps are blocked from touching us
756 */
757
758 dev_dbg(card->dev, "ASoC: starting resume work\n");
759
760 /* Bring us up into D2 so that DAPM starts enabling things */
761 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
762
763 snd_soc_card_resume_pre(card);
764
765 for_each_card_components(card, component) {
766 if (snd_soc_component_is_suspended(component))
767 snd_soc_component_resume(component);
768 }
769
770 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_RESUME);
771
772 /* unmute any active DACs */
773 soc_playback_digital_mute(card, 0);
774
775 snd_soc_card_resume_post(card);
776
777 dev_dbg(card->dev, "ASoC: resume work completed\n");
778
779 /* Recheck all endpoints too, their state is affected by suspend */
780 dapm_mark_endpoints_dirty(card);
781 snd_soc_dapm_sync(&card->dapm);
782
783 /* userspace can access us now we are back as we were before */
784 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
785 }
786
787 /* powers up audio subsystem after a suspend */
788 int snd_soc_resume(struct device *dev)
789 {
790 struct snd_soc_card *card = dev_get_drvdata(dev);
791 struct snd_soc_component *component;
792
793 /* If the card is not initialized yet there is nothing to do */
794 if (!snd_soc_card_is_instantiated(card))
795 return 0;
796
797 /* activate pins from sleep state */
798 for_each_card_components(card, component)
799 if (snd_soc_component_active(component))
800 pinctrl_pm_select_default_state(component->dev);
801
802 dev_dbg(dev, "ASoC: Scheduling resume work\n");
803 if (!schedule_work(&card->deferred_resume_work))
804 dev_err(dev, "ASoC: resume work item may be lost\n");
805
806 return 0;
807 }
808 EXPORT_SYMBOL_GPL(snd_soc_resume);
809
810 static void soc_resume_init(struct snd_soc_card *card)
811 {
812 /* deferred resume work */
813 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
814 }
815 #else
816 #define snd_soc_suspend NULL
817 #define snd_soc_resume NULL
818 static inline void soc_resume_init(struct snd_soc_card *card) { }
819 #endif
820
821 static struct device_node
822 *soc_component_to_node(struct snd_soc_component *component)
823 {
824 struct device_node *of_node;
825
826 of_node = component->dev->of_node;
827 if (!of_node && component->dev->parent)
828 of_node = component->dev->parent->of_node;
829
830 return of_node;
831 }
832
833 struct of_phandle_args *snd_soc_copy_dai_args(struct device *dev,
834 const struct of_phandle_args *args)
835 {
836 struct of_phandle_args *ret = devm_kzalloc(dev, sizeof(*ret), GFP_KERNEL);
837
838 if (!ret)
839 return NULL;
840
841 *ret = *args;
842
843 return ret;
844 }
845 EXPORT_SYMBOL_GPL(snd_soc_copy_dai_args);
846
847 static int snd_soc_is_matching_component(
848 const struct snd_soc_dai_link_component *dlc,
849 struct snd_soc_component *component)
850 {
851 struct device_node *component_of_node;
852
853 if (!dlc)
854 return 0;
855
856 if (dlc->dai_args) {
857 struct snd_soc_dai *dai;
858
859 for_each_component_dais(component, dai)
860 if (snd_soc_is_matching_dai(dlc, dai))
861 return 1;
862 return 0;
863 }
864
865 component_of_node = soc_component_to_node(component);
866
867 if (dlc->of_node && component_of_node != dlc->of_node)
868 return 0;
869 if (dlc->name && strcmp(component->name, dlc->name))
870 return 0;
871
872 return 1;
873 }
874
875 static struct snd_soc_component *soc_find_component(
876 const struct snd_soc_dai_link_component *dlc)
877 {
878 struct snd_soc_component *component;
879
880 lockdep_assert_held(&client_mutex);
881
882 /*
883 * NOTE
884 *
885 * It returns *1st* found component, but some driver
886 * has few components by same of_node/name
887 * ex)
888 * CPU component and generic DMAEngine component
889 */
890 for_each_component(component)
891 if (snd_soc_is_matching_component(dlc, component))
892 return component;
893
894 return NULL;
895 }
896
897 /**
898 * snd_soc_find_dai - Find a registered DAI
899 *
900 * @dlc: name of the DAI or the DAI driver and optional component info to match
901 *
902 * This function will search all registered components and their DAIs to
903 * find the DAI of the same name. The component's of_node and name
904 * should also match if being specified.
905 *
906 * Return: pointer of DAI, or NULL if not found.
907 */
908 struct snd_soc_dai *snd_soc_find_dai(
909 const struct snd_soc_dai_link_component *dlc)
910 {
911 struct snd_soc_component *component;
912 struct snd_soc_dai *dai;
913
914 lockdep_assert_held(&client_mutex);
915
916 /* Find CPU DAI from registered DAIs */
917 for_each_component(component)
918 if (snd_soc_is_matching_component(dlc, component))
919 for_each_component_dais(component, dai)
920 if (snd_soc_is_matching_dai(dlc, dai))
921 return dai;
922
923 return NULL;
924 }
925 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
926
927 struct snd_soc_dai *snd_soc_find_dai_with_mutex(
928 const struct snd_soc_dai_link_component *dlc)
929 {
930 struct snd_soc_dai *dai;
931
932 mutex_lock(&client_mutex);
933 dai = snd_soc_find_dai(dlc);
934 mutex_unlock(&client_mutex);
935
936 return dai;
937 }
938 EXPORT_SYMBOL_GPL(snd_soc_find_dai_with_mutex);
939
940 static int soc_dai_link_sanity_check(struct snd_soc_card *card,
941 struct snd_soc_dai_link *link)
942 {
943 int i;
944 struct snd_soc_dai_link_component *dlc;
945
946 /* Codec check */
947 for_each_link_codecs(link, i, dlc) {
948 /*
949 * Codec must be specified by 1 of name or OF node,
950 * not both or neither.
951 */
952 if (snd_soc_dlc_component_is_invalid(dlc))
953 goto component_invalid;
954
955 if (snd_soc_dlc_component_is_empty(dlc))
956 goto component_empty;
957
958 /* Codec DAI name must be specified */
959 if (snd_soc_dlc_dai_is_empty(dlc))
960 goto dai_empty;
961
962 /*
963 * Defer card registration if codec component is not added to
964 * component list.
965 */
966 if (!soc_find_component(dlc))
967 goto component_not_found;
968 }
969
970 /* Platform check */
971 for_each_link_platforms(link, i, dlc) {
972 /*
973 * Platform may be specified by either name or OF node, but it
974 * can be left unspecified, then no components will be inserted
975 * in the rtdcom list
976 */
977 if (snd_soc_dlc_component_is_invalid(dlc))
978 goto component_invalid;
979
980 if (snd_soc_dlc_component_is_empty(dlc))
981 goto component_empty;
982
983 /*
984 * Defer card registration if platform component is not added to
985 * component list.
986 */
987 if (!soc_find_component(dlc))
988 goto component_not_found;
989 }
990
991 /* CPU check */
992 for_each_link_cpus(link, i, dlc) {
993 /*
994 * CPU device may be specified by either name or OF node, but
995 * can be left unspecified, and will be matched based on DAI
996 * name alone..
997 */
998 if (snd_soc_dlc_component_is_invalid(dlc))
999 goto component_invalid;
1000
1001
1002 if (snd_soc_dlc_component_is_empty(dlc)) {
1003 /*
1004 * At least one of CPU DAI name or CPU device name/node must be specified
1005 */
1006 if (snd_soc_dlc_dai_is_empty(dlc))
1007 goto component_dai_empty;
1008 } else {
1009 /*
1010 * Defer card registration if Component is not added
1011 */
1012 if (!soc_find_component(dlc))
1013 goto component_not_found;
1014 }
1015 }
1016
1017 return 0;
1018
1019 component_invalid:
1020 dev_err(card->dev, "ASoC: Both Component name/of_node are set for %s\n", link->name);
1021 return -EINVAL;
1022
1023 component_empty:
1024 dev_err(card->dev, "ASoC: Neither Component name/of_node are set for %s\n", link->name);
1025 return -EINVAL;
1026
1027 component_not_found:
1028 dev_dbg(card->dev, "ASoC: Component %s not found for link %s\n", dlc->name, link->name);
1029 return -EPROBE_DEFER;
1030
1031 dai_empty:
1032 dev_err(card->dev, "ASoC: DAI name is not set for %s\n", link->name);
1033 return -EINVAL;
1034
1035 component_dai_empty:
1036 dev_err(card->dev, "ASoC: Neither DAI/Component name/of_node are set for %s\n", link->name);
1037 return -EINVAL;
1038 }
1039
1040 #define MAX_DEFAULT_CH_MAP_SIZE 8
1041 static struct snd_soc_dai_link_ch_map default_ch_map_sync[MAX_DEFAULT_CH_MAP_SIZE] = {
1042 { .cpu = 0, .codec = 0 },
1043 { .cpu = 1, .codec = 1 },
1044 { .cpu = 2, .codec = 2 },
1045 { .cpu = 3, .codec = 3 },
1046 { .cpu = 4, .codec = 4 },
1047 { .cpu = 5, .codec = 5 },
1048 { .cpu = 6, .codec = 6 },
1049 { .cpu = 7, .codec = 7 },
1050 };
1051 static struct snd_soc_dai_link_ch_map default_ch_map_1cpu[MAX_DEFAULT_CH_MAP_SIZE] = {
1052 { .cpu = 0, .codec = 0 },
1053 { .cpu = 0, .codec = 1 },
1054 { .cpu = 0, .codec = 2 },
1055 { .cpu = 0, .codec = 3 },
1056 { .cpu = 0, .codec = 4 },
1057 { .cpu = 0, .codec = 5 },
1058 { .cpu = 0, .codec = 6 },
1059 { .cpu = 0, .codec = 7 },
1060 };
1061 static struct snd_soc_dai_link_ch_map default_ch_map_1codec[MAX_DEFAULT_CH_MAP_SIZE] = {
1062 { .cpu = 0, .codec = 0 },
1063 { .cpu = 1, .codec = 0 },
1064 { .cpu = 2, .codec = 0 },
1065 { .cpu = 3, .codec = 0 },
1066 { .cpu = 4, .codec = 0 },
1067 { .cpu = 5, .codec = 0 },
1068 { .cpu = 6, .codec = 0 },
1069 { .cpu = 7, .codec = 0 },
1070 };
1071 static int snd_soc_compensate_channel_connection_map(struct snd_soc_card *card,
1072 struct snd_soc_dai_link *dai_link)
1073 {
1074 struct snd_soc_dai_link_ch_map *ch_maps;
1075 int i;
1076
1077 /*
1078 * dai_link->ch_maps indicates how CPU/Codec are connected.
1079 * It will be a map seen from a larger number of DAI.
1080 * see
1081 * soc.h :: [dai_link->ch_maps Image sample]
1082 */
1083
1084 /* it should have ch_maps if connection was N:M */
1085 if (dai_link->num_cpus > 1 && dai_link->num_codecs > 1 &&
1086 dai_link->num_cpus != dai_link->num_codecs && !dai_link->ch_maps) {
1087 dev_err(card->dev, "need to have ch_maps when N:M connection (%s)",
1088 dai_link->name);
1089 return -EINVAL;
1090 }
1091
1092 /* do nothing if it has own maps */
1093 if (dai_link->ch_maps)
1094 goto sanity_check;
1095
1096 /* check default map size */
1097 if (dai_link->num_cpus > MAX_DEFAULT_CH_MAP_SIZE ||
1098 dai_link->num_codecs > MAX_DEFAULT_CH_MAP_SIZE) {
1099 dev_err(card->dev, "soc-core.c needs update default_connection_maps");
1100 return -EINVAL;
1101 }
1102
1103 /* Compensate missing map for ... */
1104 if (dai_link->num_cpus == dai_link->num_codecs)
1105 dai_link->ch_maps = default_ch_map_sync; /* for 1:1 or N:N */
1106 else if (dai_link->num_cpus < dai_link->num_codecs)
1107 dai_link->ch_maps = default_ch_map_1cpu; /* for 1:N */
1108 else
1109 dai_link->ch_maps = default_ch_map_1codec; /* for N:1 */
1110
1111 sanity_check:
1112 dev_dbg(card->dev, "dai_link %s\n", dai_link->stream_name);
1113 for_each_link_ch_maps(dai_link, i, ch_maps) {
1114 if ((ch_maps->cpu >= dai_link->num_cpus) ||
1115 (ch_maps->codec >= dai_link->num_codecs)) {
1116 dev_err(card->dev,
1117 "unexpected dai_link->ch_maps[%d] index (cpu(%d/%d) codec(%d/%d))",
1118 i,
1119 ch_maps->cpu, dai_link->num_cpus,
1120 ch_maps->codec, dai_link->num_codecs);
1121 return -EINVAL;
1122 }
1123
1124 dev_dbg(card->dev, " [%d] cpu%d <-> codec%d\n",
1125 i, ch_maps->cpu, ch_maps->codec);
1126 }
1127
1128 return 0;
1129 }
1130
1131 /**
1132 * snd_soc_remove_pcm_runtime - Remove a pcm_runtime from card
1133 * @card: The ASoC card to which the pcm_runtime has
1134 * @rtd: The pcm_runtime to remove
1135 *
1136 * This function removes a pcm_runtime from the ASoC card.
1137 */
1138 void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
1139 struct snd_soc_pcm_runtime *rtd)
1140 {
1141 lockdep_assert_held(&client_mutex);
1142
1143 /*
1144 * Notify the machine driver for extra destruction
1145 */
1146 snd_soc_card_remove_dai_link(card, rtd->dai_link);
1147
1148 soc_free_pcm_runtime(rtd);
1149 }
1150 EXPORT_SYMBOL_GPL(snd_soc_remove_pcm_runtime);
1151
1152 /**
1153 * snd_soc_add_pcm_runtime - Add a pcm_runtime dynamically via dai_link
1154 * @card: The ASoC card to which the pcm_runtime is added
1155 * @dai_link: The DAI link to find pcm_runtime
1156 *
1157 * This function adds a pcm_runtime ASoC card by using dai_link.
1158 *
1159 * Note: Topology can use this API to add pcm_runtime when probing the
1160 * topology component. And machine drivers can still define static
1161 * DAI links in dai_link array.
1162 */
1163 static int snd_soc_add_pcm_runtime(struct snd_soc_card *card,
1164 struct snd_soc_dai_link *dai_link)
1165 {
1166 struct snd_soc_pcm_runtime *rtd;
1167 struct snd_soc_dai_link_component *codec, *platform, *cpu;
1168 struct snd_soc_component *component;
1169 int i, ret;
1170
1171 lockdep_assert_held(&client_mutex);
1172
1173 /*
1174 * Notify the machine driver for extra initialization
1175 */
1176 ret = snd_soc_card_add_dai_link(card, dai_link);
1177 if (ret < 0)
1178 return ret;
1179
1180 if (dai_link->ignore)
1181 return 0;
1182
1183 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1184
1185 ret = soc_dai_link_sanity_check(card, dai_link);
1186 if (ret < 0)
1187 return ret;
1188
1189 rtd = soc_new_pcm_runtime(card, dai_link);
1190 if (!rtd)
1191 return -ENOMEM;
1192
1193 for_each_link_cpus(dai_link, i, cpu) {
1194 snd_soc_rtd_to_cpu(rtd, i) = snd_soc_find_dai(cpu);
1195 if (!snd_soc_rtd_to_cpu(rtd, i)) {
1196 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1197 cpu->dai_name);
1198 goto _err_defer;
1199 }
1200 snd_soc_rtd_add_component(rtd, snd_soc_rtd_to_cpu(rtd, i)->component);
1201 }
1202
1203 /* Find CODEC from registered CODECs */
1204 for_each_link_codecs(dai_link, i, codec) {
1205 snd_soc_rtd_to_codec(rtd, i) = snd_soc_find_dai(codec);
1206 if (!snd_soc_rtd_to_codec(rtd, i)) {
1207 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
1208 codec->dai_name);
1209 goto _err_defer;
1210 }
1211
1212 snd_soc_rtd_add_component(rtd, snd_soc_rtd_to_codec(rtd, i)->component);
1213 }
1214
1215 /* Find PLATFORM from registered PLATFORMs */
1216 for_each_link_platforms(dai_link, i, platform) {
1217 for_each_component(component) {
1218 if (!snd_soc_is_matching_component(platform, component))
1219 continue;
1220
1221 if (snd_soc_component_is_dummy(component) && component->num_dai)
1222 continue;
1223
1224 snd_soc_rtd_add_component(rtd, component);
1225 }
1226 }
1227
1228 return 0;
1229
1230 _err_defer:
1231 snd_soc_remove_pcm_runtime(card, rtd);
1232 return -EPROBE_DEFER;
1233 }
1234
1235 int snd_soc_add_pcm_runtimes(struct snd_soc_card *card,
1236 struct snd_soc_dai_link *dai_link,
1237 int num_dai_link)
1238 {
1239 for (int i = 0; i < num_dai_link; i++) {
1240 int ret;
1241
1242 ret = snd_soc_compensate_channel_connection_map(card, dai_link + i);
1243 if (ret < 0)
1244 return ret;
1245
1246 ret = snd_soc_add_pcm_runtime(card, dai_link + i);
1247 if (ret < 0)
1248 return ret;
1249 }
1250
1251 return 0;
1252 }
1253 EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtimes);
1254
1255 static void snd_soc_runtime_get_dai_fmt(struct snd_soc_pcm_runtime *rtd)
1256 {
1257 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1258 struct snd_soc_dai *dai, *not_used;
1259 u64 pos, possible_fmt;
1260 unsigned int mask = 0, dai_fmt = 0;
1261 int i, j, priority, pri, until;
1262
1263 /*
1264 * Get selectable format from each DAIs.
1265 *
1266 ****************************
1267 * NOTE
1268 * Using .auto_selectable_formats is not mandatory,
1269 * we can select format manually from Sound Card.
1270 * When use it, driver should list well tested format only.
1271 ****************************
1272 *
1273 * ex)
1274 * auto_selectable_formats (= SND_SOC_POSSIBLE_xxx)
1275 * (A) (B) (C)
1276 * DAI0_: { 0x000F, 0x00F0, 0x0F00 };
1277 * DAI1 : { 0xF000, 0x0F00 };
1278 * (X) (Y)
1279 *
1280 * "until" will be 3 in this case (MAX array size from DAI0 and DAI1)
1281 * Here is dev_dbg() message and comments
1282 *
1283 * priority = 1
1284 * DAI0: (pri, fmt) = (1, 000000000000000F) // 1st check (A) DAI1 is not selected
1285 * DAI1: (pri, fmt) = (0, 0000000000000000) // Necessary Waste
1286 * DAI0: (pri, fmt) = (1, 000000000000000F) // 2nd check (A)
1287 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1288 * priority = 2
1289 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 3rd check (A) + (B)
1290 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1291 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 4th check (A) + (B)
1292 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1293 * priority = 3
1294 * DAI0: (pri, fmt) = (3, 0000000000000FFF) // 5th check (A) + (B) + (C)
1295 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1296 * found auto selected format: 0000000000000F00
1297 */
1298 until = snd_soc_dai_get_fmt_max_priority(rtd);
1299 for (priority = 1; priority <= until; priority++) {
1300 for_each_rtd_dais(rtd, j, not_used) {
1301
1302 possible_fmt = ULLONG_MAX;
1303 for_each_rtd_dais(rtd, i, dai) {
1304 u64 fmt = 0;
1305
1306 pri = (j >= i) ? priority : priority - 1;
1307 fmt = snd_soc_dai_get_fmt(dai, pri);
1308 possible_fmt &= fmt;
1309 }
1310 if (possible_fmt)
1311 goto found;
1312 }
1313 }
1314 /* Not Found */
1315 return;
1316 found:
1317 /*
1318 * convert POSSIBLE_DAIFMT to DAIFMT
1319 *
1320 * Some basic/default settings on each is defined as 0.
1321 * see
1322 * SND_SOC_DAIFMT_NB_NF
1323 * SND_SOC_DAIFMT_GATED
1324 *
1325 * SND_SOC_DAIFMT_xxx_MASK can't notice it if Sound Card specify
1326 * these value, and will be overwrite to auto selected value.
1327 *
1328 * To avoid such issue, loop from 63 to 0 here.
1329 * Small number of SND_SOC_POSSIBLE_xxx will be Hi priority.
1330 * Basic/Default settings of each part and above are defined
1331 * as Hi priority (= small number) of SND_SOC_POSSIBLE_xxx.
1332 */
1333 for (i = 63; i >= 0; i--) {
1334 pos = 1ULL << i;
1335 switch (possible_fmt & pos) {
1336 /*
1337 * for format
1338 */
1339 case SND_SOC_POSSIBLE_DAIFMT_I2S:
1340 case SND_SOC_POSSIBLE_DAIFMT_RIGHT_J:
1341 case SND_SOC_POSSIBLE_DAIFMT_LEFT_J:
1342 case SND_SOC_POSSIBLE_DAIFMT_DSP_A:
1343 case SND_SOC_POSSIBLE_DAIFMT_DSP_B:
1344 case SND_SOC_POSSIBLE_DAIFMT_AC97:
1345 case SND_SOC_POSSIBLE_DAIFMT_PDM:
1346 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_FORMAT_MASK) | i;
1347 break;
1348 /*
1349 * for clock
1350 */
1351 case SND_SOC_POSSIBLE_DAIFMT_CONT:
1352 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_CONT;
1353 break;
1354 case SND_SOC_POSSIBLE_DAIFMT_GATED:
1355 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_GATED;
1356 break;
1357 /*
1358 * for clock invert
1359 */
1360 case SND_SOC_POSSIBLE_DAIFMT_NB_NF:
1361 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_NF;
1362 break;
1363 case SND_SOC_POSSIBLE_DAIFMT_NB_IF:
1364 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_IF;
1365 break;
1366 case SND_SOC_POSSIBLE_DAIFMT_IB_NF:
1367 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_NF;
1368 break;
1369 case SND_SOC_POSSIBLE_DAIFMT_IB_IF:
1370 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_IF;
1371 break;
1372 /*
1373 * for clock provider / consumer
1374 */
1375 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFP:
1376 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFP;
1377 break;
1378 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFP:
1379 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFP;
1380 break;
1381 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFC:
1382 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFC;
1383 break;
1384 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFC:
1385 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFC;
1386 break;
1387 }
1388 }
1389
1390 /*
1391 * Some driver might have very complex limitation.
1392 * In such case, user want to auto-select non-limitation part,
1393 * and want to manually specify complex part.
1394 *
1395 * Or for example, if both CPU and Codec can be clock provider,
1396 * but because of its quality, user want to specify it manually.
1397 *
1398 * Use manually specified settings if sound card did.
1399 */
1400 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK))
1401 mask |= SND_SOC_DAIFMT_FORMAT_MASK;
1402 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_MASK))
1403 mask |= SND_SOC_DAIFMT_CLOCK_MASK;
1404 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_INV_MASK))
1405 mask |= SND_SOC_DAIFMT_INV_MASK;
1406 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK))
1407 mask |= SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
1408
1409 dai_link->dai_fmt |= (dai_fmt & mask);
1410 }
1411
1412 /**
1413 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1414 * @rtd: The runtime for which the DAI link format should be changed
1415 * @dai_fmt: The new DAI link format
1416 *
1417 * This function updates the DAI link format for all DAIs connected to the DAI
1418 * link for the specified runtime.
1419 *
1420 * Note: For setups with a static format set the dai_fmt field in the
1421 * corresponding snd_dai_link struct instead of using this function.
1422 *
1423 * Returns 0 on success, otherwise a negative error code.
1424 */
1425 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1426 unsigned int dai_fmt)
1427 {
1428 struct snd_soc_dai *cpu_dai;
1429 struct snd_soc_dai *codec_dai;
1430 unsigned int i;
1431 int ret;
1432
1433 if (!dai_fmt)
1434 return 0;
1435
1436 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1437 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1438 if (ret != 0 && ret != -ENOTSUPP)
1439 return ret;
1440 }
1441
1442 /* Flip the polarity for the "CPU" end of link */
1443 dai_fmt = snd_soc_daifmt_clock_provider_flipped(dai_fmt);
1444
1445 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1446 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1447 if (ret != 0 && ret != -ENOTSUPP)
1448 return ret;
1449 }
1450
1451 return 0;
1452 }
1453 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1454
1455 static int soc_init_pcm_runtime(struct snd_soc_card *card,
1456 struct snd_soc_pcm_runtime *rtd)
1457 {
1458 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1459 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
1460 struct snd_soc_component *component;
1461 int ret, num, i;
1462
1463 /* do machine specific initialization */
1464 ret = snd_soc_link_init(rtd);
1465 if (ret < 0)
1466 return ret;
1467
1468 snd_soc_runtime_get_dai_fmt(rtd);
1469 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1470 if (ret)
1471 goto err;
1472
1473 /* add DPCM sysfs entries */
1474 soc_dpcm_debugfs_add(rtd);
1475
1476 num = rtd->num;
1477
1478 /*
1479 * most drivers will register their PCMs using DAI link ordering but
1480 * topology based drivers can use the DAI link id field to set PCM
1481 * device number and then use rtd + a base offset of the BEs.
1482 */
1483 for_each_rtd_components(rtd, i, component) {
1484 if (!component->driver->use_dai_pcm_id)
1485 continue;
1486
1487 if (rtd->dai_link->no_pcm)
1488 num += component->driver->be_pcm_base;
1489 else
1490 num = rtd->dai_link->id;
1491 }
1492
1493 /* create compress_device if possible */
1494 ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1495 if (ret != -ENOTSUPP)
1496 goto err;
1497
1498 /* create the pcm */
1499 ret = soc_new_pcm(rtd, num);
1500 if (ret < 0) {
1501 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1502 dai_link->stream_name, ret);
1503 goto err;
1504 }
1505
1506 ret = snd_soc_pcm_dai_new(rtd);
1507 if (ret < 0)
1508 goto err;
1509
1510 rtd->initialized = true;
1511
1512 return 0;
1513 err:
1514 snd_soc_link_exit(rtd);
1515 return ret;
1516 }
1517
1518 static void soc_set_name_prefix(struct snd_soc_card *card,
1519 struct snd_soc_component *component)
1520 {
1521 struct device_node *of_node = soc_component_to_node(component);
1522 const char *str;
1523 int ret, i;
1524
1525 for (i = 0; i < card->num_configs; i++) {
1526 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1527
1528 if (snd_soc_is_matching_component(&map->dlc, component) &&
1529 map->name_prefix) {
1530 component->name_prefix = map->name_prefix;
1531 return;
1532 }
1533 }
1534
1535 /*
1536 * If there is no configuration table or no match in the table,
1537 * check if a prefix is provided in the node
1538 */
1539 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1540 if (ret < 0)
1541 return;
1542
1543 component->name_prefix = str;
1544 }
1545
1546 static void soc_remove_component(struct snd_soc_component *component,
1547 int probed)
1548 {
1549
1550 if (!component->card)
1551 return;
1552
1553 if (probed)
1554 snd_soc_component_remove(component);
1555
1556 list_del_init(&component->card_list);
1557 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1558 soc_cleanup_component_debugfs(component);
1559 component->card = NULL;
1560 snd_soc_component_module_put_when_remove(component);
1561 }
1562
1563 static int soc_probe_component(struct snd_soc_card *card,
1564 struct snd_soc_component *component)
1565 {
1566 struct snd_soc_dapm_context *dapm =
1567 snd_soc_component_get_dapm(component);
1568 struct snd_soc_dai *dai;
1569 int probed = 0;
1570 int ret;
1571
1572 if (snd_soc_component_is_dummy(component))
1573 return 0;
1574
1575 if (component->card) {
1576 if (component->card != card) {
1577 dev_err(component->dev,
1578 "Trying to bind component \"%s\" to card \"%s\" but is already bound to card \"%s\"\n",
1579 component->name, card->name, component->card->name);
1580 return -ENODEV;
1581 }
1582 return 0;
1583 }
1584
1585 ret = snd_soc_component_module_get_when_probe(component);
1586 if (ret < 0)
1587 return ret;
1588
1589 component->card = card;
1590 soc_set_name_prefix(card, component);
1591
1592 soc_init_component_debugfs(component);
1593
1594 snd_soc_dapm_init(dapm, card, component);
1595
1596 ret = snd_soc_dapm_new_controls(dapm,
1597 component->driver->dapm_widgets,
1598 component->driver->num_dapm_widgets);
1599
1600 if (ret != 0) {
1601 dev_err(component->dev,
1602 "Failed to create new controls %d\n", ret);
1603 goto err_probe;
1604 }
1605
1606 for_each_component_dais(component, dai) {
1607 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1608 if (ret != 0) {
1609 dev_err(component->dev,
1610 "Failed to create DAI widgets %d\n", ret);
1611 goto err_probe;
1612 }
1613 }
1614
1615 ret = snd_soc_component_probe(component);
1616 if (ret < 0)
1617 goto err_probe;
1618
1619 WARN(dapm->idle_bias_off &&
1620 dapm->bias_level != SND_SOC_BIAS_OFF,
1621 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1622 component->name);
1623 probed = 1;
1624
1625 /*
1626 * machine specific init
1627 * see
1628 * snd_soc_component_set_aux()
1629 */
1630 ret = snd_soc_component_init(component);
1631 if (ret < 0)
1632 goto err_probe;
1633
1634 ret = snd_soc_add_component_controls(component,
1635 component->driver->controls,
1636 component->driver->num_controls);
1637 if (ret < 0)
1638 goto err_probe;
1639
1640 ret = snd_soc_dapm_add_routes(dapm,
1641 component->driver->dapm_routes,
1642 component->driver->num_dapm_routes);
1643 if (ret < 0) {
1644 if (card->disable_route_checks) {
1645 dev_info(card->dev,
1646 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1647 __func__);
1648 } else {
1649 dev_err(card->dev,
1650 "%s: snd_soc_dapm_add_routes failed: %d\n",
1651 __func__, ret);
1652 goto err_probe;
1653 }
1654 }
1655
1656 /* see for_each_card_components */
1657 list_add(&component->card_list, &card->component_dev_list);
1658
1659 err_probe:
1660 if (ret < 0)
1661 soc_remove_component(component, probed);
1662
1663 return ret;
1664 }
1665
1666 static void soc_remove_link_dais(struct snd_soc_card *card)
1667 {
1668 struct snd_soc_pcm_runtime *rtd;
1669 int order;
1670
1671 for_each_comp_order(order) {
1672 for_each_card_rtds(card, rtd) {
1673 /* remove all rtd connected DAIs in good order */
1674 snd_soc_pcm_dai_remove(rtd, order);
1675 }
1676 }
1677 }
1678
1679 static int soc_probe_link_dais(struct snd_soc_card *card)
1680 {
1681 struct snd_soc_pcm_runtime *rtd;
1682 int order, ret;
1683
1684 for_each_comp_order(order) {
1685 for_each_card_rtds(card, rtd) {
1686 /* probe all rtd connected DAIs in good order */
1687 ret = snd_soc_pcm_dai_probe(rtd, order);
1688 if (ret)
1689 return ret;
1690 }
1691 }
1692
1693 return 0;
1694 }
1695
1696 static void soc_remove_link_components(struct snd_soc_card *card)
1697 {
1698 struct snd_soc_component *component;
1699 struct snd_soc_pcm_runtime *rtd;
1700 int i, order;
1701
1702 for_each_comp_order(order) {
1703 for_each_card_rtds(card, rtd) {
1704 for_each_rtd_components(rtd, i, component) {
1705 if (component->driver->remove_order != order)
1706 continue;
1707
1708 soc_remove_component(component, 1);
1709 }
1710 }
1711 }
1712 }
1713
1714 static int soc_probe_link_components(struct snd_soc_card *card)
1715 {
1716 struct snd_soc_component *component;
1717 struct snd_soc_pcm_runtime *rtd;
1718 int i, ret, order;
1719
1720 for_each_comp_order(order) {
1721 for_each_card_rtds(card, rtd) {
1722 for_each_rtd_components(rtd, i, component) {
1723 if (component->driver->probe_order != order)
1724 continue;
1725
1726 ret = soc_probe_component(card, component);
1727 if (ret < 0)
1728 return ret;
1729 }
1730 }
1731 }
1732
1733 return 0;
1734 }
1735
1736 static void soc_unbind_aux_dev(struct snd_soc_card *card)
1737 {
1738 struct snd_soc_component *component, *_component;
1739
1740 for_each_card_auxs_safe(card, component, _component) {
1741 /* for snd_soc_component_init() */
1742 snd_soc_component_set_aux(component, NULL);
1743 list_del(&component->card_aux_list);
1744 }
1745 }
1746
1747 static int soc_bind_aux_dev(struct snd_soc_card *card)
1748 {
1749 struct snd_soc_component *component;
1750 struct snd_soc_aux_dev *aux;
1751 int i;
1752
1753 for_each_card_pre_auxs(card, i, aux) {
1754 /* codecs, usually analog devices */
1755 component = soc_find_component(&aux->dlc);
1756 if (!component)
1757 return -EPROBE_DEFER;
1758
1759 /* for snd_soc_component_init() */
1760 snd_soc_component_set_aux(component, aux);
1761 /* see for_each_card_auxs */
1762 list_add(&component->card_aux_list, &card->aux_comp_list);
1763 }
1764 return 0;
1765 }
1766
1767 static int soc_probe_aux_devices(struct snd_soc_card *card)
1768 {
1769 struct snd_soc_component *component;
1770 int order;
1771 int ret;
1772
1773 for_each_comp_order(order) {
1774 for_each_card_auxs(card, component) {
1775 if (component->driver->probe_order != order)
1776 continue;
1777
1778 ret = soc_probe_component(card, component);
1779 if (ret < 0)
1780 return ret;
1781 }
1782 }
1783
1784 return 0;
1785 }
1786
1787 static void soc_remove_aux_devices(struct snd_soc_card *card)
1788 {
1789 struct snd_soc_component *comp, *_comp;
1790 int order;
1791
1792 for_each_comp_order(order) {
1793 for_each_card_auxs_safe(card, comp, _comp) {
1794 if (comp->driver->remove_order == order)
1795 soc_remove_component(comp, 1);
1796 }
1797 }
1798 }
1799
1800 #ifdef CONFIG_DMI
1801 /*
1802 * If a DMI filed contain strings in this blacklist (e.g.
1803 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
1804 * as invalid and dropped when setting the card long name from DMI info.
1805 */
1806 static const char * const dmi_blacklist[] = {
1807 "To be filled by OEM",
1808 "TBD by OEM",
1809 "Default String",
1810 "Board Manufacturer",
1811 "Board Vendor Name",
1812 "Board Product Name",
1813 NULL, /* terminator */
1814 };
1815
1816 /*
1817 * Trim special characters, and replace '-' with '_' since '-' is used to
1818 * separate different DMI fields in the card long name. Only number and
1819 * alphabet characters and a few separator characters are kept.
1820 */
1821 static void cleanup_dmi_name(char *name)
1822 {
1823 int i, j = 0;
1824
1825 for (i = 0; name[i]; i++) {
1826 if (isalnum(name[i]) || (name[i] == '.')
1827 || (name[i] == '_'))
1828 name[j++] = name[i];
1829 else if (name[i] == '-')
1830 name[j++] = '_';
1831 }
1832
1833 name[j] = '\0';
1834 }
1835
1836 /*
1837 * Check if a DMI field is valid, i.e. not containing any string
1838 * in the black list.
1839 */
1840 static int is_dmi_valid(const char *field)
1841 {
1842 int i = 0;
1843
1844 while (dmi_blacklist[i]) {
1845 if (strstr(field, dmi_blacklist[i]))
1846 return 0;
1847 i++;
1848 }
1849
1850 return 1;
1851 }
1852
1853 /*
1854 * Append a string to card->dmi_longname with character cleanups.
1855 */
1856 static void append_dmi_string(struct snd_soc_card *card, const char *str)
1857 {
1858 char *dst = card->dmi_longname;
1859 size_t dst_len = sizeof(card->dmi_longname);
1860 size_t len;
1861
1862 len = strlen(dst);
1863 snprintf(dst + len, dst_len - len, "-%s", str);
1864
1865 len++; /* skip the separator "-" */
1866 if (len < dst_len)
1867 cleanup_dmi_name(dst + len);
1868 }
1869
1870 /**
1871 * snd_soc_set_dmi_name() - Register DMI names to card
1872 * @card: The card to register DMI names
1873 * @flavour: The flavour "differentiator" for the card amongst its peers.
1874 *
1875 * An Intel machine driver may be used by many different devices but are
1876 * difficult for userspace to differentiate, since machine drivers usually
1877 * use their own name as the card short name and leave the card long name
1878 * blank. To differentiate such devices and fix bugs due to lack of
1879 * device-specific configurations, this function allows DMI info to be used
1880 * as the sound card long name, in the format of
1881 * "vendor-product-version-board"
1882 * (Character '-' is used to separate different DMI fields here).
1883 * This will help the user space to load the device-specific Use Case Manager
1884 * (UCM) configurations for the card.
1885 *
1886 * Possible card long names may be:
1887 * DellInc.-XPS139343-01-0310JH
1888 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1889 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1890 *
1891 * This function also supports flavoring the card longname to provide
1892 * the extra differentiation, like "vendor-product-version-board-flavor".
1893 *
1894 * We only keep number and alphabet characters and a few separator characters
1895 * in the card long name since UCM in the user space uses the card long names
1896 * as card configuration directory names and AudoConf cannot support special
1897 * characters like SPACE.
1898 *
1899 * Returns 0 on success, otherwise a negative error code.
1900 */
1901 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1902 {
1903 const char *vendor, *product, *board;
1904
1905 if (card->long_name)
1906 return 0; /* long name already set by driver or from DMI */
1907
1908 if (!dmi_available)
1909 return 0;
1910
1911 /* make up dmi long name as: vendor-product-version-board */
1912 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1913 if (!vendor || !is_dmi_valid(vendor)) {
1914 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1915 return 0;
1916 }
1917
1918 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1919 cleanup_dmi_name(card->dmi_longname);
1920
1921 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1922 if (product && is_dmi_valid(product)) {
1923 const char *product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1924
1925 append_dmi_string(card, product);
1926
1927 /*
1928 * some vendors like Lenovo may only put a self-explanatory
1929 * name in the product version field
1930 */
1931 if (product_version && is_dmi_valid(product_version))
1932 append_dmi_string(card, product_version);
1933 }
1934
1935 board = dmi_get_system_info(DMI_BOARD_NAME);
1936 if (board && is_dmi_valid(board)) {
1937 if (!product || strcasecmp(board, product))
1938 append_dmi_string(card, board);
1939 } else if (!product) {
1940 /* fall back to using legacy name */
1941 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1942 return 0;
1943 }
1944
1945 /* Add flavour to dmi long name */
1946 if (flavour)
1947 append_dmi_string(card, flavour);
1948
1949 /* set the card long name */
1950 card->long_name = card->dmi_longname;
1951
1952 return 0;
1953 }
1954 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1955 #endif /* CONFIG_DMI */
1956
1957 static void soc_check_tplg_fes(struct snd_soc_card *card)
1958 {
1959 struct snd_soc_component *component;
1960 const struct snd_soc_component_driver *comp_drv;
1961 struct snd_soc_dai_link *dai_link;
1962 int i;
1963
1964 for_each_component(component) {
1965
1966 /* does this component override BEs ? */
1967 if (!component->driver->ignore_machine)
1968 continue;
1969
1970 /* for this machine ? */
1971 if (!strcmp(component->driver->ignore_machine,
1972 card->dev->driver->name))
1973 goto match;
1974 if (strcmp(component->driver->ignore_machine,
1975 dev_name(card->dev)))
1976 continue;
1977 match:
1978 /* machine matches, so override the rtd data */
1979 for_each_card_prelinks(card, i, dai_link) {
1980
1981 /* ignore this FE */
1982 if (dai_link->dynamic) {
1983 dai_link->ignore = true;
1984 continue;
1985 }
1986
1987 dev_dbg(card->dev, "info: override BE DAI link %s\n",
1988 card->dai_link[i].name);
1989
1990 /* override platform component */
1991 if (!dai_link->platforms) {
1992 dev_err(card->dev, "init platform error");
1993 continue;
1994 }
1995
1996 if (component->dev->of_node)
1997 dai_link->platforms->of_node = component->dev->of_node;
1998 else
1999 dai_link->platforms->name = component->name;
2000
2001 /* convert non BE into BE */
2002 if (!dai_link->no_pcm) {
2003 dai_link->no_pcm = 1;
2004
2005 if (dai_link->dpcm_playback)
2006 dev_warn(card->dev,
2007 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_playback=1\n",
2008 dai_link->name);
2009 if (dai_link->dpcm_capture)
2010 dev_warn(card->dev,
2011 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_capture=1\n",
2012 dai_link->name);
2013
2014 /* convert normal link into DPCM one */
2015 if (!(dai_link->dpcm_playback ||
2016 dai_link->dpcm_capture)) {
2017 dai_link->dpcm_playback = !dai_link->capture_only;
2018 dai_link->dpcm_capture = !dai_link->playback_only;
2019 }
2020 }
2021
2022 /*
2023 * override any BE fixups
2024 * see
2025 * snd_soc_link_be_hw_params_fixup()
2026 */
2027 dai_link->be_hw_params_fixup =
2028 component->driver->be_hw_params_fixup;
2029
2030 /*
2031 * most BE links don't set stream name, so set it to
2032 * dai link name if it's NULL to help bind widgets.
2033 */
2034 if (!dai_link->stream_name)
2035 dai_link->stream_name = dai_link->name;
2036 }
2037
2038 /* Inform userspace we are using alternate topology */
2039 if (component->driver->topology_name_prefix) {
2040
2041 /* topology shortname created? */
2042 if (!card->topology_shortname_created) {
2043 comp_drv = component->driver;
2044
2045 snprintf(card->topology_shortname, 32, "%s-%s",
2046 comp_drv->topology_name_prefix,
2047 card->name);
2048 card->topology_shortname_created = true;
2049 }
2050
2051 /* use topology shortname */
2052 card->name = card->topology_shortname;
2053 }
2054 }
2055 }
2056
2057 #define soc_setup_card_name(card, name, name1, name2) \
2058 __soc_setup_card_name(card, name, sizeof(name), name1, name2)
2059 static void __soc_setup_card_name(struct snd_soc_card *card,
2060 char *name, int len,
2061 const char *name1, const char *name2)
2062 {
2063 const char *src = name1 ? name1 : name2;
2064 int i;
2065
2066 snprintf(name, len, "%s", src);
2067
2068 if (name != card->snd_card->driver)
2069 return;
2070
2071 /*
2072 * Name normalization (driver field)
2073 *
2074 * The driver name is somewhat special, as it's used as a key for
2075 * searches in the user-space.
2076 *
2077 * ex)
2078 * "abcd??efg" -> "abcd__efg"
2079 */
2080 for (i = 0; i < len; i++) {
2081 switch (name[i]) {
2082 case '_':
2083 case '-':
2084 case '\0':
2085 break;
2086 default:
2087 if (!isalnum(name[i]))
2088 name[i] = '_';
2089 break;
2090 }
2091 }
2092
2093 /*
2094 * The driver field should contain a valid string from the user view.
2095 * The wrapping usually does not work so well here. Set a smaller string
2096 * in the specific ASoC driver.
2097 */
2098 if (strlen(src) > len - 1)
2099 dev_err(card->dev, "ASoC: driver name too long '%s' -> '%s'\n", src, name);
2100 }
2101
2102 static void soc_cleanup_card_resources(struct snd_soc_card *card)
2103 {
2104 struct snd_soc_pcm_runtime *rtd, *n;
2105
2106 if (card->snd_card)
2107 snd_card_disconnect_sync(card->snd_card);
2108
2109 snd_soc_dapm_shutdown(card);
2110
2111 /* release machine specific resources */
2112 for_each_card_rtds(card, rtd)
2113 if (rtd->initialized)
2114 snd_soc_link_exit(rtd);
2115 /* remove and free each DAI */
2116 soc_remove_link_dais(card);
2117 soc_remove_link_components(card);
2118
2119 for_each_card_rtds_safe(card, rtd, n)
2120 snd_soc_remove_pcm_runtime(card, rtd);
2121
2122 /* remove auxiliary devices */
2123 soc_remove_aux_devices(card);
2124 soc_unbind_aux_dev(card);
2125
2126 snd_soc_dapm_free(&card->dapm);
2127 soc_cleanup_card_debugfs(card);
2128
2129 /* remove the card */
2130 snd_soc_card_remove(card);
2131
2132 if (card->snd_card) {
2133 snd_card_free(card->snd_card);
2134 card->snd_card = NULL;
2135 }
2136 }
2137
2138 static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
2139 {
2140 if (snd_soc_card_is_instantiated(card)) {
2141 card->instantiated = false;
2142 snd_soc_flush_all_delayed_work(card);
2143
2144 soc_cleanup_card_resources(card);
2145 if (!unregister)
2146 list_add(&card->list, &unbind_card_list);
2147 } else {
2148 if (unregister)
2149 list_del(&card->list);
2150 }
2151 }
2152
2153 static int snd_soc_bind_card(struct snd_soc_card *card)
2154 {
2155 struct snd_soc_pcm_runtime *rtd;
2156 struct snd_soc_component *component;
2157 int ret;
2158
2159 mutex_lock(&client_mutex);
2160 snd_soc_card_mutex_lock_root(card);
2161
2162 snd_soc_fill_dummy_dai(card);
2163
2164 snd_soc_dapm_init(&card->dapm, card, NULL);
2165
2166 /* check whether any platform is ignore machine FE and using topology */
2167 soc_check_tplg_fes(card);
2168
2169 /* bind aux_devs too */
2170 ret = soc_bind_aux_dev(card);
2171 if (ret < 0)
2172 goto probe_end;
2173
2174 /* add predefined DAI links to the list */
2175 card->num_rtd = 0;
2176 ret = snd_soc_add_pcm_runtimes(card, card->dai_link, card->num_links);
2177 if (ret < 0)
2178 goto probe_end;
2179
2180 /* card bind complete so register a sound card */
2181 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2182 card->owner, 0, &card->snd_card);
2183 if (ret < 0) {
2184 dev_err(card->dev,
2185 "ASoC: can't create sound card for card %s: %d\n",
2186 card->name, ret);
2187 goto probe_end;
2188 }
2189
2190 soc_init_card_debugfs(card);
2191
2192 soc_resume_init(card);
2193
2194 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2195 card->num_dapm_widgets);
2196 if (ret < 0)
2197 goto probe_end;
2198
2199 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2200 card->num_of_dapm_widgets);
2201 if (ret < 0)
2202 goto probe_end;
2203
2204 /* initialise the sound card only once */
2205 ret = snd_soc_card_probe(card);
2206 if (ret < 0)
2207 goto probe_end;
2208
2209 /* probe all components used by DAI links on this card */
2210 ret = soc_probe_link_components(card);
2211 if (ret < 0) {
2212 if (ret != -EPROBE_DEFER) {
2213 dev_err(card->dev,
2214 "ASoC: failed to instantiate card %d\n", ret);
2215 }
2216 goto probe_end;
2217 }
2218
2219 /* probe auxiliary components */
2220 ret = soc_probe_aux_devices(card);
2221 if (ret < 0) {
2222 dev_err(card->dev,
2223 "ASoC: failed to probe aux component %d\n", ret);
2224 goto probe_end;
2225 }
2226
2227 /* probe all DAI links on this card */
2228 ret = soc_probe_link_dais(card);
2229 if (ret < 0) {
2230 dev_err(card->dev,
2231 "ASoC: failed to instantiate card %d\n", ret);
2232 goto probe_end;
2233 }
2234
2235 for_each_card_rtds(card, rtd) {
2236 ret = soc_init_pcm_runtime(card, rtd);
2237 if (ret < 0)
2238 goto probe_end;
2239 }
2240
2241 snd_soc_dapm_link_dai_widgets(card);
2242 snd_soc_dapm_connect_dai_link_widgets(card);
2243
2244 ret = snd_soc_add_card_controls(card, card->controls,
2245 card->num_controls);
2246 if (ret < 0)
2247 goto probe_end;
2248
2249 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2250 card->num_dapm_routes);
2251 if (ret < 0) {
2252 if (card->disable_route_checks) {
2253 dev_info(card->dev,
2254 "%s: disable_route_checks set, ignoring errors on add_routes\n",
2255 __func__);
2256 } else {
2257 dev_err(card->dev,
2258 "%s: snd_soc_dapm_add_routes failed: %d\n",
2259 __func__, ret);
2260 goto probe_end;
2261 }
2262 }
2263
2264 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2265 card->num_of_dapm_routes);
2266 if (ret < 0)
2267 goto probe_end;
2268
2269 /* try to set some sane longname if DMI is available */
2270 snd_soc_set_dmi_name(card, NULL);
2271
2272 soc_setup_card_name(card, card->snd_card->shortname,
2273 card->name, NULL);
2274 soc_setup_card_name(card, card->snd_card->longname,
2275 card->long_name, card->name);
2276 soc_setup_card_name(card, card->snd_card->driver,
2277 card->driver_name, card->name);
2278
2279 if (card->components) {
2280 /* the current implementation of snd_component_add() accepts */
2281 /* multiple components in the string separated by space, */
2282 /* but the string collision (identical string) check might */
2283 /* not work correctly */
2284 ret = snd_component_add(card->snd_card, card->components);
2285 if (ret < 0) {
2286 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
2287 card->name, ret);
2288 goto probe_end;
2289 }
2290 }
2291
2292 ret = snd_soc_card_late_probe(card);
2293 if (ret < 0)
2294 goto probe_end;
2295
2296 snd_soc_dapm_new_widgets(card);
2297 snd_soc_card_fixup_controls(card);
2298
2299 ret = snd_card_register(card->snd_card);
2300 if (ret < 0) {
2301 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2302 ret);
2303 goto probe_end;
2304 }
2305
2306 card->instantiated = 1;
2307 dapm_mark_endpoints_dirty(card);
2308 snd_soc_dapm_sync(&card->dapm);
2309
2310 /* deactivate pins to sleep state */
2311 for_each_card_components(card, component)
2312 if (!snd_soc_component_active(component))
2313 pinctrl_pm_select_sleep_state(component->dev);
2314
2315 probe_end:
2316 if (ret < 0)
2317 soc_cleanup_card_resources(card);
2318
2319 snd_soc_card_mutex_unlock(card);
2320 mutex_unlock(&client_mutex);
2321
2322 return ret;
2323 }
2324
2325 /* probes a new socdev */
2326 static int soc_probe(struct platform_device *pdev)
2327 {
2328 struct snd_soc_card *card = platform_get_drvdata(pdev);
2329
2330 /*
2331 * no card, so machine driver should be registering card
2332 * we should not be here in that case so ret error
2333 */
2334 if (!card)
2335 return -EINVAL;
2336
2337 dev_warn(&pdev->dev,
2338 "ASoC: machine %s should use snd_soc_register_card()\n",
2339 card->name);
2340
2341 /* Bodge while we unpick instantiation */
2342 card->dev = &pdev->dev;
2343
2344 return devm_snd_soc_register_card(&pdev->dev, card);
2345 }
2346
2347 int snd_soc_poweroff(struct device *dev)
2348 {
2349 struct snd_soc_card *card = dev_get_drvdata(dev);
2350 struct snd_soc_component *component;
2351
2352 if (!snd_soc_card_is_instantiated(card))
2353 return 0;
2354
2355 /*
2356 * Flush out pmdown_time work - we actually do want to run it
2357 * now, we're shutting down so no imminent restart.
2358 */
2359 snd_soc_flush_all_delayed_work(card);
2360
2361 snd_soc_dapm_shutdown(card);
2362
2363 /* deactivate pins to sleep state */
2364 for_each_card_components(card, component)
2365 pinctrl_pm_select_sleep_state(component->dev);
2366
2367 return 0;
2368 }
2369 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2370
2371 const struct dev_pm_ops snd_soc_pm_ops = {
2372 .suspend = snd_soc_suspend,
2373 .resume = snd_soc_resume,
2374 .freeze = snd_soc_suspend,
2375 .thaw = snd_soc_resume,
2376 .poweroff = snd_soc_poweroff,
2377 .restore = snd_soc_resume,
2378 };
2379 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2380
2381 /* ASoC platform driver */
2382 static struct platform_driver soc_driver = {
2383 .driver = {
2384 .name = "soc-audio",
2385 .pm = &snd_soc_pm_ops,
2386 },
2387 .probe = soc_probe,
2388 };
2389
2390 /**
2391 * snd_soc_cnew - create new control
2392 * @_template: control template
2393 * @data: control private data
2394 * @long_name: control long name
2395 * @prefix: control name prefix
2396 *
2397 * Create a new mixer control from a template control.
2398 *
2399 * Returns 0 for success, else error.
2400 */
2401 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2402 void *data, const char *long_name,
2403 const char *prefix)
2404 {
2405 struct snd_kcontrol_new template;
2406 struct snd_kcontrol *kcontrol;
2407 char *name = NULL;
2408
2409 memcpy(&template, _template, sizeof(template));
2410 template.index = 0;
2411
2412 if (!long_name)
2413 long_name = template.name;
2414
2415 if (prefix) {
2416 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2417 if (!name)
2418 return NULL;
2419
2420 template.name = name;
2421 } else {
2422 template.name = long_name;
2423 }
2424
2425 kcontrol = snd_ctl_new1(&template, data);
2426
2427 kfree(name);
2428
2429 return kcontrol;
2430 }
2431 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2432
2433 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2434 const struct snd_kcontrol_new *controls, int num_controls,
2435 const char *prefix, void *data)
2436 {
2437 int i;
2438
2439 for (i = 0; i < num_controls; i++) {
2440 const struct snd_kcontrol_new *control = &controls[i];
2441 int err = snd_ctl_add(card, snd_soc_cnew(control, data,
2442 control->name, prefix));
2443 if (err < 0) {
2444 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2445 control->name, err);
2446 return err;
2447 }
2448 }
2449
2450 return 0;
2451 }
2452
2453 /**
2454 * snd_soc_add_component_controls - Add an array of controls to a component.
2455 *
2456 * @component: Component to add controls to
2457 * @controls: Array of controls to add
2458 * @num_controls: Number of elements in the array
2459 *
2460 * Return: 0 for success, else error.
2461 */
2462 int snd_soc_add_component_controls(struct snd_soc_component *component,
2463 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2464 {
2465 struct snd_card *card = component->card->snd_card;
2466
2467 return snd_soc_add_controls(card, component->dev, controls,
2468 num_controls, component->name_prefix, component);
2469 }
2470 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2471
2472 /**
2473 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2474 * Convenience function to add a list of controls.
2475 *
2476 * @soc_card: SoC card to add controls to
2477 * @controls: array of controls to add
2478 * @num_controls: number of elements in the array
2479 *
2480 * Return 0 for success, else error.
2481 */
2482 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2483 const struct snd_kcontrol_new *controls, int num_controls)
2484 {
2485 struct snd_card *card = soc_card->snd_card;
2486
2487 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2488 NULL, soc_card);
2489 }
2490 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2491
2492 /**
2493 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2494 * Convenience function to add a list of controls.
2495 *
2496 * @dai: DAI to add controls to
2497 * @controls: array of controls to add
2498 * @num_controls: number of elements in the array
2499 *
2500 * Return 0 for success, else error.
2501 */
2502 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2503 const struct snd_kcontrol_new *controls, int num_controls)
2504 {
2505 struct snd_card *card = dai->component->card->snd_card;
2506
2507 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2508 NULL, dai);
2509 }
2510 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2511
2512 /**
2513 * snd_soc_register_card - Register a card with the ASoC core
2514 *
2515 * @card: Card to register
2516 *
2517 */
2518 int snd_soc_register_card(struct snd_soc_card *card)
2519 {
2520 if (!card->name || !card->dev)
2521 return -EINVAL;
2522
2523 dev_set_drvdata(card->dev, card);
2524
2525 INIT_LIST_HEAD(&card->widgets);
2526 INIT_LIST_HEAD(&card->paths);
2527 INIT_LIST_HEAD(&card->dapm_list);
2528 INIT_LIST_HEAD(&card->aux_comp_list);
2529 INIT_LIST_HEAD(&card->component_dev_list);
2530 INIT_LIST_HEAD(&card->list);
2531 INIT_LIST_HEAD(&card->rtd_list);
2532 INIT_LIST_HEAD(&card->dapm_dirty);
2533 INIT_LIST_HEAD(&card->dobj_list);
2534
2535 card->instantiated = 0;
2536 mutex_init(&card->mutex);
2537 mutex_init(&card->dapm_mutex);
2538 mutex_init(&card->pcm_mutex);
2539
2540 return snd_soc_bind_card(card);
2541 }
2542 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2543
2544 /**
2545 * snd_soc_unregister_card - Unregister a card with the ASoC core
2546 *
2547 * @card: Card to unregister
2548 *
2549 */
2550 void snd_soc_unregister_card(struct snd_soc_card *card)
2551 {
2552 mutex_lock(&client_mutex);
2553 snd_soc_unbind_card(card, true);
2554 mutex_unlock(&client_mutex);
2555 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2556 }
2557 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2558
2559 /*
2560 * Simplify DAI link configuration by removing ".-1" from device names
2561 * and sanitizing names.
2562 */
2563 static char *fmt_single_name(struct device *dev, int *id)
2564 {
2565 const char *devname = dev_name(dev);
2566 char *found, *name;
2567 unsigned int id1, id2;
2568
2569 if (devname == NULL)
2570 return NULL;
2571
2572 name = devm_kstrdup(dev, devname, GFP_KERNEL);
2573 if (!name)
2574 return NULL;
2575
2576 /* are we a "%s.%d" name (platform and SPI components) */
2577 found = strstr(name, dev->driver->name);
2578 if (found) {
2579 /* get ID */
2580 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2581
2582 /* discard ID from name if ID == -1 */
2583 if (*id == -1)
2584 found[strlen(dev->driver->name)] = '\0';
2585 }
2586
2587 /* I2C component devices are named "bus-addr" */
2588 } else if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2589
2590 /* create unique ID number from I2C addr and bus */
2591 *id = ((id1 & 0xffff) << 16) + id2;
2592
2593 devm_kfree(dev, name);
2594
2595 /* sanitize component name for DAI link creation */
2596 name = devm_kasprintf(dev, GFP_KERNEL, "%s.%s", dev->driver->name, devname);
2597 } else {
2598 *id = 0;
2599 }
2600
2601 return name;
2602 }
2603
2604 /*
2605 * Simplify DAI link naming for single devices with multiple DAIs by removing
2606 * any ".-1" and using the DAI name (instead of device name).
2607 */
2608 static inline char *fmt_multiple_name(struct device *dev,
2609 struct snd_soc_dai_driver *dai_drv)
2610 {
2611 if (dai_drv->name == NULL) {
2612 dev_err(dev,
2613 "ASoC: error - multiple DAI %s registered with no name\n",
2614 dev_name(dev));
2615 return NULL;
2616 }
2617
2618 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2619 }
2620
2621 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2622 {
2623 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2624 list_del(&dai->list);
2625 }
2626 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2627
2628 /**
2629 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2630 *
2631 * @component: The component the DAIs are registered for
2632 * @dai_drv: DAI driver to use for the DAI
2633 * @legacy_dai_naming: if %true, use legacy single-name format;
2634 * if %false, use multiple-name format;
2635 *
2636 * Topology can use this API to register DAIs when probing a component.
2637 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2638 * will be freed in the component cleanup.
2639 */
2640 struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2641 struct snd_soc_dai_driver *dai_drv,
2642 bool legacy_dai_naming)
2643 {
2644 struct device *dev = component->dev;
2645 struct snd_soc_dai *dai;
2646
2647 lockdep_assert_held(&client_mutex);
2648
2649 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2650 if (dai == NULL)
2651 return NULL;
2652
2653 /*
2654 * Back in the old days when we still had component-less DAIs,
2655 * instead of having a static name, component-less DAIs would
2656 * inherit the name of the parent device so it is possible to
2657 * register multiple instances of the DAI. We still need to keep
2658 * the same naming style even though those DAIs are not
2659 * component-less anymore.
2660 */
2661 if (legacy_dai_naming &&
2662 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2663 dai->name = fmt_single_name(dev, &dai->id);
2664 } else {
2665 dai->name = fmt_multiple_name(dev, dai_drv);
2666 if (dai_drv->id)
2667 dai->id = dai_drv->id;
2668 else
2669 dai->id = component->num_dai;
2670 }
2671 if (!dai->name)
2672 return NULL;
2673
2674 dai->component = component;
2675 dai->dev = dev;
2676 dai->driver = dai_drv;
2677
2678 /* see for_each_component_dais */
2679 list_add_tail(&dai->list, &component->dai_list);
2680 component->num_dai++;
2681
2682 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2683 return dai;
2684 }
2685 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2686
2687 /**
2688 * snd_soc_unregister_dais - Unregister DAIs from the ASoC core
2689 *
2690 * @component: The component for which the DAIs should be unregistered
2691 */
2692 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2693 {
2694 struct snd_soc_dai *dai, *_dai;
2695
2696 for_each_component_dais_safe(component, dai, _dai)
2697 snd_soc_unregister_dai(dai);
2698 }
2699
2700 /**
2701 * snd_soc_register_dais - Register a DAI with the ASoC core
2702 *
2703 * @component: The component the DAIs are registered for
2704 * @dai_drv: DAI driver to use for the DAIs
2705 * @count: Number of DAIs
2706 */
2707 static int snd_soc_register_dais(struct snd_soc_component *component,
2708 struct snd_soc_dai_driver *dai_drv,
2709 size_t count)
2710 {
2711 struct snd_soc_dai *dai;
2712 unsigned int i;
2713 int ret;
2714
2715 for (i = 0; i < count; i++) {
2716 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2717 component->driver->legacy_dai_naming);
2718 if (dai == NULL) {
2719 ret = -ENOMEM;
2720 goto err;
2721 }
2722 }
2723
2724 return 0;
2725
2726 err:
2727 snd_soc_unregister_dais(component);
2728
2729 return ret;
2730 }
2731
2732 #define ENDIANNESS_MAP(name) \
2733 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2734 static u64 endianness_format_map[] = {
2735 ENDIANNESS_MAP(S16_),
2736 ENDIANNESS_MAP(U16_),
2737 ENDIANNESS_MAP(S24_),
2738 ENDIANNESS_MAP(U24_),
2739 ENDIANNESS_MAP(S32_),
2740 ENDIANNESS_MAP(U32_),
2741 ENDIANNESS_MAP(S24_3),
2742 ENDIANNESS_MAP(U24_3),
2743 ENDIANNESS_MAP(S20_3),
2744 ENDIANNESS_MAP(U20_3),
2745 ENDIANNESS_MAP(S18_3),
2746 ENDIANNESS_MAP(U18_3),
2747 ENDIANNESS_MAP(FLOAT_),
2748 ENDIANNESS_MAP(FLOAT64_),
2749 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2750 };
2751
2752 /*
2753 * Fix up the DAI formats for endianness: codecs don't actually see
2754 * the endianness of the data but we're using the CPU format
2755 * definitions which do need to include endianness so we ensure that
2756 * codec DAIs always have both big and little endian variants set.
2757 */
2758 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2759 {
2760 int i;
2761
2762 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2763 if (stream->formats & endianness_format_map[i])
2764 stream->formats |= endianness_format_map[i];
2765 }
2766
2767 static void snd_soc_try_rebind_card(void)
2768 {
2769 struct snd_soc_card *card, *c;
2770
2771 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2772 if (!snd_soc_bind_card(card))
2773 list_del(&card->list);
2774 }
2775
2776 static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2777 {
2778 struct snd_soc_card *card = component->card;
2779
2780 snd_soc_unregister_dais(component);
2781
2782 if (card)
2783 snd_soc_unbind_card(card, false);
2784
2785 list_del(&component->list);
2786 }
2787
2788 int snd_soc_component_initialize(struct snd_soc_component *component,
2789 const struct snd_soc_component_driver *driver,
2790 struct device *dev)
2791 {
2792 INIT_LIST_HEAD(&component->dai_list);
2793 INIT_LIST_HEAD(&component->dobj_list);
2794 INIT_LIST_HEAD(&component->card_list);
2795 INIT_LIST_HEAD(&component->list);
2796 mutex_init(&component->io_mutex);
2797
2798 if (!component->name) {
2799 component->name = fmt_single_name(dev, &component->id);
2800 if (!component->name) {
2801 dev_err(dev, "ASoC: Failed to allocate name\n");
2802 return -ENOMEM;
2803 }
2804 }
2805
2806 component->dev = dev;
2807 component->driver = driver;
2808
2809 #ifdef CONFIG_DEBUG_FS
2810 if (!component->debugfs_prefix)
2811 component->debugfs_prefix = driver->debugfs_prefix;
2812 #endif
2813
2814 return 0;
2815 }
2816 EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
2817
2818 int snd_soc_add_component(struct snd_soc_component *component,
2819 struct snd_soc_dai_driver *dai_drv,
2820 int num_dai)
2821 {
2822 int ret;
2823 int i;
2824
2825 mutex_lock(&client_mutex);
2826
2827 if (component->driver->endianness) {
2828 for (i = 0; i < num_dai; i++) {
2829 convert_endianness_formats(&dai_drv[i].playback);
2830 convert_endianness_formats(&dai_drv[i].capture);
2831 }
2832 }
2833
2834 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2835 if (ret < 0) {
2836 dev_err(component->dev, "ASoC: Failed to register DAIs: %d\n",
2837 ret);
2838 goto err_cleanup;
2839 }
2840
2841 if (!component->driver->write && !component->driver->read) {
2842 if (!component->regmap)
2843 component->regmap = dev_get_regmap(component->dev,
2844 NULL);
2845 if (component->regmap)
2846 snd_soc_component_setup_regmap(component);
2847 }
2848
2849 /* see for_each_component */
2850 list_add(&component->list, &component_list);
2851
2852 err_cleanup:
2853 if (ret < 0)
2854 snd_soc_del_component_unlocked(component);
2855
2856 mutex_unlock(&client_mutex);
2857
2858 if (ret == 0)
2859 snd_soc_try_rebind_card();
2860
2861 return ret;
2862 }
2863 EXPORT_SYMBOL_GPL(snd_soc_add_component);
2864
2865 int snd_soc_register_component(struct device *dev,
2866 const struct snd_soc_component_driver *component_driver,
2867 struct snd_soc_dai_driver *dai_drv,
2868 int num_dai)
2869 {
2870 struct snd_soc_component *component;
2871 int ret;
2872
2873 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2874 if (!component)
2875 return -ENOMEM;
2876
2877 ret = snd_soc_component_initialize(component, component_driver, dev);
2878 if (ret < 0)
2879 return ret;
2880
2881 return snd_soc_add_component(component, dai_drv, num_dai);
2882 }
2883 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2884
2885 /**
2886 * snd_soc_unregister_component_by_driver - Unregister component using a given driver
2887 * from the ASoC core
2888 *
2889 * @dev: The device to unregister
2890 * @component_driver: The component driver to unregister
2891 */
2892 void snd_soc_unregister_component_by_driver(struct device *dev,
2893 const struct snd_soc_component_driver *component_driver)
2894 {
2895 struct snd_soc_component *component;
2896
2897 if (!component_driver)
2898 return;
2899
2900 mutex_lock(&client_mutex);
2901 component = snd_soc_lookup_component_nolocked(dev, component_driver->name);
2902 if (!component)
2903 goto out;
2904
2905 snd_soc_del_component_unlocked(component);
2906
2907 out:
2908 mutex_unlock(&client_mutex);
2909 }
2910 EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
2911
2912 /**
2913 * snd_soc_unregister_component - Unregister all related component
2914 * from the ASoC core
2915 *
2916 * @dev: The device to unregister
2917 */
2918 void snd_soc_unregister_component(struct device *dev)
2919 {
2920 mutex_lock(&client_mutex);
2921 while (1) {
2922 struct snd_soc_component *component = snd_soc_lookup_component_nolocked(dev, NULL);
2923
2924 if (!component)
2925 break;
2926
2927 snd_soc_del_component_unlocked(component);
2928 }
2929 mutex_unlock(&client_mutex);
2930 }
2931 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2932
2933 /* Retrieve a card's name from device tree */
2934 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2935 const char *propname)
2936 {
2937 struct device_node *np;
2938 int ret;
2939
2940 if (!card->dev) {
2941 pr_err("card->dev is not set before calling %s\n", __func__);
2942 return -EINVAL;
2943 }
2944
2945 np = card->dev->of_node;
2946
2947 ret = of_property_read_string_index(np, propname, 0, &card->name);
2948 /*
2949 * EINVAL means the property does not exist. This is fine providing
2950 * card->name was previously set, which is checked later in
2951 * snd_soc_register_card.
2952 */
2953 if (ret < 0 && ret != -EINVAL) {
2954 dev_err(card->dev,
2955 "ASoC: Property '%s' could not be read: %d\n",
2956 propname, ret);
2957 return ret;
2958 }
2959
2960 return 0;
2961 }
2962 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2963
2964 static const struct snd_soc_dapm_widget simple_widgets[] = {
2965 SND_SOC_DAPM_MIC("Microphone", NULL),
2966 SND_SOC_DAPM_LINE("Line", NULL),
2967 SND_SOC_DAPM_HP("Headphone", NULL),
2968 SND_SOC_DAPM_SPK("Speaker", NULL),
2969 };
2970
2971 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2972 const char *propname)
2973 {
2974 struct device_node *np = card->dev->of_node;
2975 struct snd_soc_dapm_widget *widgets;
2976 const char *template, *wname;
2977 int i, j, num_widgets;
2978
2979 num_widgets = of_property_count_strings(np, propname);
2980 if (num_widgets < 0) {
2981 dev_err(card->dev,
2982 "ASoC: Property '%s' does not exist\n", propname);
2983 return -EINVAL;
2984 }
2985 if (!num_widgets) {
2986 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2987 propname);
2988 return -EINVAL;
2989 }
2990 if (num_widgets & 1) {
2991 dev_err(card->dev,
2992 "ASoC: Property '%s' length is not even\n", propname);
2993 return -EINVAL;
2994 }
2995
2996 num_widgets /= 2;
2997
2998 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2999 GFP_KERNEL);
3000 if (!widgets) {
3001 dev_err(card->dev,
3002 "ASoC: Could not allocate memory for widgets\n");
3003 return -ENOMEM;
3004 }
3005
3006 for (i = 0; i < num_widgets; i++) {
3007 int ret = of_property_read_string_index(np, propname,
3008 2 * i, &template);
3009 if (ret) {
3010 dev_err(card->dev,
3011 "ASoC: Property '%s' index %d read error:%d\n",
3012 propname, 2 * i, ret);
3013 return -EINVAL;
3014 }
3015
3016 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3017 if (!strncmp(template, simple_widgets[j].name,
3018 strlen(simple_widgets[j].name))) {
3019 widgets[i] = simple_widgets[j];
3020 break;
3021 }
3022 }
3023
3024 if (j >= ARRAY_SIZE(simple_widgets)) {
3025 dev_err(card->dev,
3026 "ASoC: DAPM widget '%s' is not supported\n",
3027 template);
3028 return -EINVAL;
3029 }
3030
3031 ret = of_property_read_string_index(np, propname,
3032 (2 * i) + 1,
3033 &wname);
3034 if (ret) {
3035 dev_err(card->dev,
3036 "ASoC: Property '%s' index %d read error:%d\n",
3037 propname, (2 * i) + 1, ret);
3038 return -EINVAL;
3039 }
3040
3041 widgets[i].name = wname;
3042 }
3043
3044 card->of_dapm_widgets = widgets;
3045 card->num_of_dapm_widgets = num_widgets;
3046
3047 return 0;
3048 }
3049 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3050
3051 int snd_soc_of_parse_pin_switches(struct snd_soc_card *card, const char *prop)
3052 {
3053 const unsigned int nb_controls_max = 16;
3054 const char **strings, *control_name;
3055 struct snd_kcontrol_new *controls;
3056 struct device *dev = card->dev;
3057 unsigned int i, nb_controls;
3058 int ret;
3059
3060 if (!of_property_read_bool(dev->of_node, prop))
3061 return 0;
3062
3063 strings = devm_kcalloc(dev, nb_controls_max,
3064 sizeof(*strings), GFP_KERNEL);
3065 if (!strings)
3066 return -ENOMEM;
3067
3068 ret = of_property_read_string_array(dev->of_node, prop,
3069 strings, nb_controls_max);
3070 if (ret < 0)
3071 return ret;
3072
3073 nb_controls = (unsigned int)ret;
3074
3075 controls = devm_kcalloc(dev, nb_controls,
3076 sizeof(*controls), GFP_KERNEL);
3077 if (!controls)
3078 return -ENOMEM;
3079
3080 for (i = 0; i < nb_controls; i++) {
3081 control_name = devm_kasprintf(dev, GFP_KERNEL,
3082 "%s Switch", strings[i]);
3083 if (!control_name)
3084 return -ENOMEM;
3085
3086 controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
3087 controls[i].name = control_name;
3088 controls[i].info = snd_soc_dapm_info_pin_switch;
3089 controls[i].get = snd_soc_dapm_get_pin_switch;
3090 controls[i].put = snd_soc_dapm_put_pin_switch;
3091 controls[i].private_value = (unsigned long)strings[i];
3092 }
3093
3094 card->controls = controls;
3095 card->num_controls = nb_controls;
3096
3097 return 0;
3098 }
3099 EXPORT_SYMBOL_GPL(snd_soc_of_parse_pin_switches);
3100
3101 int snd_soc_of_get_slot_mask(struct device_node *np,
3102 const char *prop_name,
3103 unsigned int *mask)
3104 {
3105 u32 val;
3106 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3107 int i;
3108
3109 if (!of_slot_mask)
3110 return 0;
3111 val /= sizeof(u32);
3112 for (i = 0; i < val; i++)
3113 if (be32_to_cpup(&of_slot_mask[i]))
3114 *mask |= (1 << i);
3115
3116 return val;
3117 }
3118 EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
3119
3120 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3121 unsigned int *tx_mask,
3122 unsigned int *rx_mask,
3123 unsigned int *slots,
3124 unsigned int *slot_width)
3125 {
3126 u32 val;
3127 int ret;
3128
3129 if (tx_mask)
3130 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3131 if (rx_mask)
3132 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3133
3134 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3135 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3136 if (ret)
3137 return ret;
3138
3139 if (slots)
3140 *slots = val;
3141 }
3142
3143 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3144 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3145 if (ret)
3146 return ret;
3147
3148 if (slot_width)
3149 *slot_width = val;
3150 }
3151
3152 return 0;
3153 }
3154 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3155
3156 void snd_soc_dlc_use_cpu_as_platform(struct snd_soc_dai_link_component *platforms,
3157 struct snd_soc_dai_link_component *cpus)
3158 {
3159 platforms->of_node = cpus->of_node;
3160 platforms->dai_args = cpus->dai_args;
3161 }
3162 EXPORT_SYMBOL_GPL(snd_soc_dlc_use_cpu_as_platform);
3163
3164 void snd_soc_of_parse_node_prefix(struct device_node *np,
3165 struct snd_soc_codec_conf *codec_conf,
3166 struct device_node *of_node,
3167 const char *propname)
3168 {
3169 const char *str;
3170 int ret;
3171
3172 ret = of_property_read_string(np, propname, &str);
3173 if (ret < 0) {
3174 /* no prefix is not error */
3175 return;
3176 }
3177
3178 codec_conf->dlc.of_node = of_node;
3179 codec_conf->name_prefix = str;
3180 }
3181 EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
3182
3183 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3184 const char *propname)
3185 {
3186 struct device_node *np = card->dev->of_node;
3187 int num_routes;
3188 struct snd_soc_dapm_route *routes;
3189 int i;
3190
3191 num_routes = of_property_count_strings(np, propname);
3192 if (num_routes < 0 || num_routes & 1) {
3193 dev_err(card->dev,
3194 "ASoC: Property '%s' does not exist or its length is not even\n",
3195 propname);
3196 return -EINVAL;
3197 }
3198 num_routes /= 2;
3199
3200 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3201 GFP_KERNEL);
3202 if (!routes) {
3203 dev_err(card->dev,
3204 "ASoC: Could not allocate DAPM route table\n");
3205 return -ENOMEM;
3206 }
3207
3208 for (i = 0; i < num_routes; i++) {
3209 int ret = of_property_read_string_index(np, propname,
3210 2 * i, &routes[i].sink);
3211 if (ret) {
3212 dev_err(card->dev,
3213 "ASoC: Property '%s' index %d could not be read: %d\n",
3214 propname, 2 * i, ret);
3215 return -EINVAL;
3216 }
3217 ret = of_property_read_string_index(np, propname,
3218 (2 * i) + 1, &routes[i].source);
3219 if (ret) {
3220 dev_err(card->dev,
3221 "ASoC: Property '%s' index %d could not be read: %d\n",
3222 propname, (2 * i) + 1, ret);
3223 return -EINVAL;
3224 }
3225 }
3226
3227 card->num_of_dapm_routes = num_routes;
3228 card->of_dapm_routes = routes;
3229
3230 return 0;
3231 }
3232 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3233
3234 int snd_soc_of_parse_aux_devs(struct snd_soc_card *card, const char *propname)
3235 {
3236 struct device_node *node = card->dev->of_node;
3237 struct snd_soc_aux_dev *aux;
3238 int num, i;
3239
3240 num = of_count_phandle_with_args(node, propname, NULL);
3241 if (num == -ENOENT) {
3242 return 0;
3243 } else if (num < 0) {
3244 dev_err(card->dev, "ASOC: Property '%s' could not be read: %d\n",
3245 propname, num);
3246 return num;
3247 }
3248
3249 aux = devm_kcalloc(card->dev, num, sizeof(*aux), GFP_KERNEL);
3250 if (!aux)
3251 return -ENOMEM;
3252 card->aux_dev = aux;
3253 card->num_aux_devs = num;
3254
3255 for_each_card_pre_auxs(card, i, aux) {
3256 aux->dlc.of_node = of_parse_phandle(node, propname, i);
3257 if (!aux->dlc.of_node)
3258 return -EINVAL;
3259 }
3260
3261 return 0;
3262 }
3263 EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs);
3264
3265 unsigned int snd_soc_daifmt_clock_provider_flipped(unsigned int dai_fmt)
3266 {
3267 unsigned int inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
3268
3269 switch (dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
3270 case SND_SOC_DAIFMT_CBP_CFP:
3271 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFC;
3272 break;
3273 case SND_SOC_DAIFMT_CBP_CFC:
3274 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFP;
3275 break;
3276 case SND_SOC_DAIFMT_CBC_CFP:
3277 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFC;
3278 break;
3279 case SND_SOC_DAIFMT_CBC_CFC:
3280 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFP;
3281 break;
3282 }
3283
3284 return inv_dai_fmt;
3285 }
3286 EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_flipped);
3287
3288 unsigned int snd_soc_daifmt_clock_provider_from_bitmap(unsigned int bit_frame)
3289 {
3290 /*
3291 * bit_frame is return value from
3292 * snd_soc_daifmt_parse_clock_provider_raw()
3293 */
3294
3295 /* Codec base */
3296 switch (bit_frame) {
3297 case 0x11:
3298 return SND_SOC_DAIFMT_CBP_CFP;
3299 case 0x10:
3300 return SND_SOC_DAIFMT_CBP_CFC;
3301 case 0x01:
3302 return SND_SOC_DAIFMT_CBC_CFP;
3303 default:
3304 return SND_SOC_DAIFMT_CBC_CFC;
3305 }
3306
3307 return 0;
3308 }
3309 EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_from_bitmap);
3310
3311 unsigned int snd_soc_daifmt_parse_format(struct device_node *np,
3312 const char *prefix)
3313 {
3314 int ret;
3315 char prop[128];
3316 unsigned int format = 0;
3317 int bit, frame;
3318 const char *str;
3319 struct {
3320 char *name;
3321 unsigned int val;
3322 } of_fmt_table[] = {
3323 { "i2s", SND_SOC_DAIFMT_I2S },
3324 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3325 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3326 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3327 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3328 { "ac97", SND_SOC_DAIFMT_AC97 },
3329 { "pdm", SND_SOC_DAIFMT_PDM},
3330 { "msb", SND_SOC_DAIFMT_MSB },
3331 { "lsb", SND_SOC_DAIFMT_LSB },
3332 };
3333
3334 if (!prefix)
3335 prefix = "";
3336
3337 /*
3338 * check "dai-format = xxx"
3339 * or "[prefix]format = xxx"
3340 * SND_SOC_DAIFMT_FORMAT_MASK area
3341 */
3342 ret = of_property_read_string(np, "dai-format", &str);
3343 if (ret < 0) {
3344 snprintf(prop, sizeof(prop), "%sformat", prefix);
3345 ret = of_property_read_string(np, prop, &str);
3346 }
3347 if (ret == 0) {
3348 int i;
3349
3350 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3351 if (strcmp(str, of_fmt_table[i].name) == 0) {
3352 format |= of_fmt_table[i].val;
3353 break;
3354 }
3355 }
3356 }
3357
3358 /*
3359 * check "[prefix]continuous-clock"
3360 * SND_SOC_DAIFMT_CLOCK_MASK area
3361 */
3362 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3363 if (of_property_read_bool(np, prop))
3364 format |= SND_SOC_DAIFMT_CONT;
3365 else
3366 format |= SND_SOC_DAIFMT_GATED;
3367
3368 /*
3369 * check "[prefix]bitclock-inversion"
3370 * check "[prefix]frame-inversion"
3371 * SND_SOC_DAIFMT_INV_MASK area
3372 */
3373 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3374 bit = of_property_read_bool(np, prop);
3375
3376 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3377 frame = of_property_read_bool(np, prop);
3378
3379 switch ((bit << 4) + frame) {
3380 case 0x11:
3381 format |= SND_SOC_DAIFMT_IB_IF;
3382 break;
3383 case 0x10:
3384 format |= SND_SOC_DAIFMT_IB_NF;
3385 break;
3386 case 0x01:
3387 format |= SND_SOC_DAIFMT_NB_IF;
3388 break;
3389 default:
3390 /* SND_SOC_DAIFMT_NB_NF is default */
3391 break;
3392 }
3393
3394 return format;
3395 }
3396 EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_format);
3397
3398 unsigned int snd_soc_daifmt_parse_clock_provider_raw(struct device_node *np,
3399 const char *prefix,
3400 struct device_node **bitclkmaster,
3401 struct device_node **framemaster)
3402 {
3403 char prop[128];
3404 unsigned int bit, frame;
3405
3406 if (!prefix)
3407 prefix = "";
3408
3409 /*
3410 * check "[prefix]bitclock-master"
3411 * check "[prefix]frame-master"
3412 */
3413 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3414 bit = of_property_read_bool(np, prop);
3415 if (bit && bitclkmaster)
3416 *bitclkmaster = of_parse_phandle(np, prop, 0);
3417
3418 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3419 frame = of_property_read_bool(np, prop);
3420 if (frame && framemaster)
3421 *framemaster = of_parse_phandle(np, prop, 0);
3422
3423 /*
3424 * return bitmap.
3425 * It will be parameter of
3426 * snd_soc_daifmt_clock_provider_from_bitmap()
3427 */
3428 return (bit << 4) + frame;
3429 }
3430 EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_clock_provider_raw);
3431
3432 int snd_soc_get_stream_cpu(const struct snd_soc_dai_link *dai_link, int stream)
3433 {
3434 /*
3435 * [Normal]
3436 *
3437 * Playback
3438 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3439 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3440 *
3441 * Capture
3442 * CPU : SNDRV_PCM_STREAM_CAPTURE
3443 * Codec: SNDRV_PCM_STREAM_CAPTURE
3444 */
3445 if (!dai_link->c2c_params)
3446 return stream;
3447
3448 /*
3449 * [Codec2Codec]
3450 *
3451 * Playback
3452 * CPU : SNDRV_PCM_STREAM_CAPTURE
3453 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3454 *
3455 * Capture
3456 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3457 * Codec: SNDRV_PCM_STREAM_CAPTURE
3458 */
3459 if (stream == SNDRV_PCM_STREAM_CAPTURE)
3460 return SNDRV_PCM_STREAM_PLAYBACK;
3461
3462 return SNDRV_PCM_STREAM_CAPTURE;
3463 }
3464 EXPORT_SYMBOL_GPL(snd_soc_get_stream_cpu);
3465
3466 int snd_soc_get_dai_id(struct device_node *ep)
3467 {
3468 struct snd_soc_component *component;
3469 struct snd_soc_dai_link_component dlc = {
3470 .of_node = of_graph_get_port_parent(ep),
3471 };
3472 int ret;
3473
3474
3475 /*
3476 * For example HDMI case, HDMI has video/sound port,
3477 * but ALSA SoC needs sound port number only.
3478 * Thus counting HDMI DT port/endpoint doesn't work.
3479 * Then, it should have .of_xlate_dai_id
3480 */
3481 ret = -ENOTSUPP;
3482 mutex_lock(&client_mutex);
3483 component = soc_find_component(&dlc);
3484 if (component)
3485 ret = snd_soc_component_of_xlate_dai_id(component, ep);
3486 mutex_unlock(&client_mutex);
3487
3488 of_node_put(dlc.of_node);
3489
3490 return ret;
3491 }
3492 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3493
3494 int snd_soc_get_dlc(const struct of_phandle_args *args, struct snd_soc_dai_link_component *dlc)
3495 {
3496 struct snd_soc_component *pos;
3497 int ret = -EPROBE_DEFER;
3498
3499 mutex_lock(&client_mutex);
3500 for_each_component(pos) {
3501 struct device_node *component_of_node = soc_component_to_node(pos);
3502
3503 if (component_of_node != args->np || !pos->num_dai)
3504 continue;
3505
3506 ret = snd_soc_component_of_xlate_dai_name(pos, args, &dlc->dai_name);
3507 if (ret == -ENOTSUPP) {
3508 struct snd_soc_dai *dai;
3509 int id = -1;
3510
3511 switch (args->args_count) {
3512 case 0:
3513 id = 0; /* same as dai_drv[0] */
3514 break;
3515 case 1:
3516 id = args->args[0];
3517 break;
3518 default:
3519 /* not supported */
3520 break;
3521 }
3522
3523 if (id < 0 || id >= pos->num_dai) {
3524 ret = -EINVAL;
3525 continue;
3526 }
3527
3528 ret = 0;
3529
3530 /* find target DAI */
3531 for_each_component_dais(pos, dai) {
3532 if (id == 0)
3533 break;
3534 id--;
3535 }
3536
3537 dlc->dai_name = snd_soc_dai_name_get(dai);
3538 } else if (ret) {
3539 /*
3540 * if another error than ENOTSUPP is returned go on and
3541 * check if another component is provided with the same
3542 * node. This may happen if a device provides several
3543 * components
3544 */
3545 continue;
3546 }
3547
3548 break;
3549 }
3550
3551 if (ret == 0)
3552 dlc->of_node = args->np;
3553
3554 mutex_unlock(&client_mutex);
3555 return ret;
3556 }
3557 EXPORT_SYMBOL_GPL(snd_soc_get_dlc);
3558
3559 int snd_soc_of_get_dlc(struct device_node *of_node,
3560 struct of_phandle_args *args,
3561 struct snd_soc_dai_link_component *dlc,
3562 int index)
3563 {
3564 struct of_phandle_args __args;
3565 int ret;
3566
3567 if (!args)
3568 args = &__args;
3569
3570 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3571 "#sound-dai-cells", index, args);
3572 if (ret)
3573 return ret;
3574
3575 return snd_soc_get_dlc(args, dlc);
3576 }
3577 EXPORT_SYMBOL_GPL(snd_soc_of_get_dlc);
3578
3579 int snd_soc_get_dai_name(const struct of_phandle_args *args,
3580 const char **dai_name)
3581 {
3582 struct snd_soc_dai_link_component dlc;
3583 int ret = snd_soc_get_dlc(args, &dlc);
3584
3585 if (ret == 0)
3586 *dai_name = dlc.dai_name;
3587
3588 return ret;
3589 }
3590 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3591
3592 int snd_soc_of_get_dai_name(struct device_node *of_node,
3593 const char **dai_name, int index)
3594 {
3595 struct snd_soc_dai_link_component dlc;
3596 int ret = snd_soc_of_get_dlc(of_node, NULL, &dlc, index);
3597
3598 if (ret == 0)
3599 *dai_name = dlc.dai_name;
3600
3601 return ret;
3602 }
3603 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3604
3605 struct snd_soc_dai *snd_soc_get_dai_via_args(const struct of_phandle_args *dai_args)
3606 {
3607 struct snd_soc_dai *dai;
3608 struct snd_soc_component *component;
3609
3610 mutex_lock(&client_mutex);
3611 for_each_component(component) {
3612 for_each_component_dais(component, dai)
3613 if (snd_soc_is_match_dai_args(dai->driver->dai_args, dai_args))
3614 goto found;
3615 }
3616 dai = NULL;
3617 found:
3618 mutex_unlock(&client_mutex);
3619 return dai;
3620 }
3621 EXPORT_SYMBOL_GPL(snd_soc_get_dai_via_args);
3622
3623 static void __snd_soc_of_put_component(struct snd_soc_dai_link_component *component)
3624 {
3625 if (component->of_node) {
3626 of_node_put(component->of_node);
3627 component->of_node = NULL;
3628 }
3629 }
3630
3631 static int __snd_soc_of_get_dai_link_component_alloc(
3632 struct device *dev, struct device_node *of_node,
3633 struct snd_soc_dai_link_component **ret_component,
3634 int *ret_num)
3635 {
3636 struct snd_soc_dai_link_component *component;
3637 int num;
3638
3639 /* Count the number of CPUs/CODECs */
3640 num = of_count_phandle_with_args(of_node, "sound-dai", "#sound-dai-cells");
3641 if (num <= 0) {
3642 if (num == -ENOENT)
3643 dev_err(dev, "No 'sound-dai' property\n");
3644 else
3645 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3646 return num;
3647 }
3648 component = devm_kcalloc(dev, num, sizeof(*component), GFP_KERNEL);
3649 if (!component)
3650 return -ENOMEM;
3651
3652 *ret_component = component;
3653 *ret_num = num;
3654
3655 return 0;
3656 }
3657
3658 /*
3659 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3660 * @dai_link: DAI link
3661 *
3662 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3663 */
3664 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3665 {
3666 struct snd_soc_dai_link_component *component;
3667 int index;
3668
3669 for_each_link_codecs(dai_link, index, component)
3670 __snd_soc_of_put_component(component);
3671 }
3672 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3673
3674 /*
3675 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3676 * @dev: Card device
3677 * @of_node: Device node
3678 * @dai_link: DAI link
3679 *
3680 * Builds an array of CODEC DAI components from the DAI link property
3681 * 'sound-dai'.
3682 * The array is set in the DAI link and the number of DAIs is set accordingly.
3683 * The device nodes in the array (of_node) must be dereferenced by calling
3684 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3685 *
3686 * Returns 0 for success
3687 */
3688 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3689 struct device_node *of_node,
3690 struct snd_soc_dai_link *dai_link)
3691 {
3692 struct snd_soc_dai_link_component *component;
3693 int index, ret;
3694
3695 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3696 &dai_link->codecs, &dai_link->num_codecs);
3697 if (ret < 0)
3698 return ret;
3699
3700 /* Parse the list */
3701 for_each_link_codecs(dai_link, index, component) {
3702 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3703 if (ret)
3704 goto err;
3705 }
3706 return 0;
3707 err:
3708 snd_soc_of_put_dai_link_codecs(dai_link);
3709 dai_link->codecs = NULL;
3710 dai_link->num_codecs = 0;
3711 return ret;
3712 }
3713 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3714
3715 /*
3716 * snd_soc_of_put_dai_link_cpus - Dereference device nodes in the codecs array
3717 * @dai_link: DAI link
3718 *
3719 * Dereference device nodes acquired by snd_soc_of_get_dai_link_cpus().
3720 */
3721 void snd_soc_of_put_dai_link_cpus(struct snd_soc_dai_link *dai_link)
3722 {
3723 struct snd_soc_dai_link_component *component;
3724 int index;
3725
3726 for_each_link_cpus(dai_link, index, component)
3727 __snd_soc_of_put_component(component);
3728 }
3729 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_cpus);
3730
3731 /*
3732 * snd_soc_of_get_dai_link_cpus - Parse a list of CPU DAIs in the devicetree
3733 * @dev: Card device
3734 * @of_node: Device node
3735 * @dai_link: DAI link
3736 *
3737 * Is analogous to snd_soc_of_get_dai_link_codecs but parses a list of CPU DAIs
3738 * instead.
3739 *
3740 * Returns 0 for success
3741 */
3742 int snd_soc_of_get_dai_link_cpus(struct device *dev,
3743 struct device_node *of_node,
3744 struct snd_soc_dai_link *dai_link)
3745 {
3746 struct snd_soc_dai_link_component *component;
3747 int index, ret;
3748
3749 /* Count the number of CPUs */
3750 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3751 &dai_link->cpus, &dai_link->num_cpus);
3752 if (ret < 0)
3753 return ret;
3754
3755 /* Parse the list */
3756 for_each_link_cpus(dai_link, index, component) {
3757 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3758 if (ret)
3759 goto err;
3760 }
3761 return 0;
3762 err:
3763 snd_soc_of_put_dai_link_cpus(dai_link);
3764 dai_link->cpus = NULL;
3765 dai_link->num_cpus = 0;
3766 return ret;
3767 }
3768 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_cpus);
3769
3770 static int __init snd_soc_init(void)
3771 {
3772 int ret;
3773
3774 snd_soc_debugfs_init();
3775 ret = snd_soc_util_init();
3776 if (ret)
3777 goto err_util_init;
3778
3779 ret = platform_driver_register(&soc_driver);
3780 if (ret)
3781 goto err_register;
3782 return 0;
3783
3784 err_register:
3785 snd_soc_util_exit();
3786 err_util_init:
3787 snd_soc_debugfs_exit();
3788 return ret;
3789 }
3790 module_init(snd_soc_init);
3791
3792 static void __exit snd_soc_exit(void)
3793 {
3794 snd_soc_util_exit();
3795 snd_soc_debugfs_exit();
3796
3797 platform_driver_unregister(&soc_driver);
3798 }
3799 module_exit(snd_soc_exit);
3800
3801 /* Module information */
3802 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3803 MODULE_DESCRIPTION("ALSA SoC Core");
3804 MODULE_LICENSE("GPL");
3805 MODULE_ALIAS("platform:soc-audio");
Kernel DRM miscellaneous fixes and cross-tree changes