1 // SPDX-License-Identifier: GPL-2.0+
3 // soc-core.c -- ALSA SoC Audio Layer
5 // Copyright 2005 Wolfson Microelectronics PLC.
6 // Copyright 2005 Openedhand Ltd.
7 // Copyright (C) 2010 Slimlogic Ltd.
8 // Copyright (C) 2010 Texas Instruments Inc.
10 // Author: Liam Girdwood <lrg@slimlogic.co.uk>
11 // with code, comments and ideas from :-
12 // Richard Purdie <richard@openedhand.com>
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
20 #include <linux/module.h>
21 #include <linux/moduleparam.h>
22 #include <linux/init.h>
23 #include <linux/delay.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>
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>
44 #define CREATE_TRACE_POINTS
45 #include <trace/events/asoc.h>
47 static DEFINE_MUTEX(client_mutex);
48 static LIST_HEAD(component_list);
49 static LIST_HEAD(unbind_card_list);
51 #define for_each_component(component) \
52 list_for_each_entry(component, &component_list, list)
55 * This is used if driver don't need to have CPU/Codec/Platform
58 struct snd_soc_dai_link_component null_dailink_component[0];
59 EXPORT_SYMBOL_GPL(null_dailink_component);
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.
66 static int pmdown_time = 5000;
67 module_param(pmdown_time, int, 0);
68 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
70 static ssize_t pmdown_time_show(struct device *dev,
71 struct device_attribute *attr, char *buf)
73 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
75 return sysfs_emit(buf, "%ld\n", rtd->pmdown_time);
78 static ssize_t pmdown_time_store(struct device *dev,
79 struct device_attribute *attr,
80 const char *buf, size_t count)
82 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
85 ret = kstrtol(buf, 10, &rtd->pmdown_time);
92 static DEVICE_ATTR_RW(pmdown_time);
94 static struct attribute *soc_dev_attrs[] = {
95 &dev_attr_pmdown_time.attr,
99 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
100 struct attribute *attr, int idx)
102 struct device *dev = kobj_to_dev(kobj);
103 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
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 */
113 static const struct attribute_group soc_dapm_dev_group = {
114 .attrs = soc_dapm_dev_attrs,
115 .is_visible = soc_dev_attr_is_visible,
118 static const struct attribute_group soc_dev_group = {
119 .attrs = soc_dev_attrs,
120 .is_visible = soc_dev_attr_is_visible,
123 static const struct attribute_group *soc_dev_attr_groups[] = {
129 #ifdef CONFIG_DEBUG_FS
130 struct dentry *snd_soc_debugfs_root;
131 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
133 static void soc_init_component_debugfs(struct snd_soc_component *component)
135 if (!component->card->debugfs_card_root)
138 if (component->debugfs_prefix) {
141 name = kasprintf(GFP_KERNEL, "%s:%s",
142 component->debugfs_prefix, component->name);
144 component->debugfs_root = debugfs_create_dir(name,
145 component->card->debugfs_card_root);
149 component->debugfs_root = debugfs_create_dir(component->name,
150 component->card->debugfs_card_root);
153 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
154 component->debugfs_root);
157 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
159 if (!component->debugfs_root)
161 debugfs_remove_recursive(component->debugfs_root);
162 component->debugfs_root = NULL;
165 static int dai_list_show(struct seq_file *m, void *v)
167 struct snd_soc_component *component;
168 struct snd_soc_dai *dai;
170 mutex_lock(&client_mutex);
172 for_each_component(component)
173 for_each_component_dais(component, dai)
174 seq_printf(m, "%s\n", dai->name);
176 mutex_unlock(&client_mutex);
180 DEFINE_SHOW_ATTRIBUTE(dai_list);
182 static int component_list_show(struct seq_file *m, void *v)
184 struct snd_soc_component *component;
186 mutex_lock(&client_mutex);
188 for_each_component(component)
189 seq_printf(m, "%s\n", component->name);
191 mutex_unlock(&client_mutex);
195 DEFINE_SHOW_ATTRIBUTE(component_list);
197 static void soc_init_card_debugfs(struct snd_soc_card *card)
199 card->debugfs_card_root = debugfs_create_dir(card->name,
200 snd_soc_debugfs_root);
202 debugfs_create_u32("dapm_pop_time", 0644, card->debugfs_card_root,
205 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
208 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
210 debugfs_remove_recursive(card->debugfs_card_root);
211 card->debugfs_card_root = NULL;
214 static void snd_soc_debugfs_init(void)
216 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
218 debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
221 debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
222 &component_list_fops);
225 static void snd_soc_debugfs_exit(void)
227 debugfs_remove_recursive(snd_soc_debugfs_root);
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) { }
241 static int snd_soc_is_match_dai_args(struct of_phandle_args *args1,
242 struct of_phandle_args *args2)
244 if (!args1 || !args2)
247 if (args1->np != args2->np)
250 for (int i = 0; i < args1->args_count; i++)
251 if (args1->args[i] != args2->args[i])
257 static inline int snd_soc_dlc_component_is_empty(struct snd_soc_dai_link_component *dlc)
259 return !(dlc->dai_args || dlc->name || dlc->of_node);
262 static inline int snd_soc_dlc_component_is_invalid(struct snd_soc_dai_link_component *dlc)
264 return (dlc->name && dlc->of_node);
267 static inline int snd_soc_dlc_dai_is_empty(struct snd_soc_dai_link_component *dlc)
269 return !(dlc->dai_args || dlc->dai_name);
272 static int snd_soc_is_matching_dai(const struct snd_soc_dai_link_component *dlc,
273 struct snd_soc_dai *dai)
279 return snd_soc_is_match_dai_args(dai->driver->dai_args, dlc->dai_args);
284 /* see snd_soc_dai_name_get() */
286 if (strcmp(dlc->dai_name, dai->name) == 0)
289 if (dai->driver->name &&
290 strcmp(dai->driver->name, dlc->dai_name) == 0)
293 if (dai->component->name &&
294 strcmp(dlc->dai_name, dai->component->name) == 0)
300 const char *snd_soc_dai_name_get(struct snd_soc_dai *dai)
302 /* see snd_soc_is_matching_dai() */
306 if (dai->driver->name)
307 return dai->driver->name;
309 if (dai->component->name)
310 return dai->component->name;
314 EXPORT_SYMBOL_GPL(snd_soc_dai_name_get);
316 static int snd_soc_rtd_add_component(struct snd_soc_pcm_runtime *rtd,
317 struct snd_soc_component *component)
319 struct snd_soc_component *comp;
322 for_each_rtd_components(rtd, i, comp) {
323 /* already connected */
324 if (comp == component)
328 /* see for_each_rtd_components */
329 rtd->components[rtd->num_components] = component;
330 rtd->num_components++;
335 struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
336 const char *driver_name)
338 struct snd_soc_component *component;
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.
352 for_each_rtd_components(rtd, i, component) {
353 const char *component_name = component->driver->name;
358 if ((component_name == driver_name) ||
359 strcmp(component_name, driver_name) == 0)
365 EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
367 struct snd_soc_component
368 *snd_soc_lookup_component_nolocked(struct device *dev, const char *driver_name)
370 struct snd_soc_component *component;
371 struct snd_soc_component *found_component;
373 found_component = NULL;
374 for_each_component(component) {
375 if ((dev == component->dev) &&
377 (driver_name == component->driver->name) ||
378 (strcmp(component->driver->name, driver_name) == 0))) {
379 found_component = component;
384 return found_component;
386 EXPORT_SYMBOL_GPL(snd_soc_lookup_component_nolocked);
388 struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
389 const char *driver_name)
391 struct snd_soc_component *component;
393 mutex_lock(&client_mutex);
394 component = snd_soc_lookup_component_nolocked(dev, driver_name);
395 mutex_unlock(&client_mutex);
399 EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
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)
405 struct snd_soc_pcm_runtime *rtd;
407 for_each_card_rtds(card, rtd) {
408 if (rtd->dai_link == dai_link)
411 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link->name);
414 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
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.
421 void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
423 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
424 int playback = SNDRV_PCM_STREAM_PLAYBACK;
426 snd_soc_dpcm_mutex_lock(rtd);
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");
435 /* are we waiting on this codec DAI stream */
436 if (rtd->pop_wait == 1) {
438 snd_soc_dapm_stream_event(rtd, playback,
439 SND_SOC_DAPM_STREAM_STOP);
442 snd_soc_dpcm_mutex_unlock(rtd);
444 EXPORT_SYMBOL_GPL(snd_soc_close_delayed_work);
446 static void soc_release_rtd_dev(struct device *dev)
448 /* "dev" means "rtd->dev" */
452 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
457 list_del(&rtd->list);
459 if (delayed_work_pending(&rtd->delayed_work))
460 flush_delayed_work(&rtd->delayed_work);
461 snd_soc_pcm_component_free(rtd);
464 * we don't need to call kfree() for rtd->dev
466 * soc_release_rtd_dev()
468 * We don't need rtd->dev NULL check, because
469 * it is alloced *before* rtd.
471 * soc_new_pcm_runtime()
473 * We don't need to mind freeing for rtd,
474 * because it was created from dev (= rtd->dev)
476 * soc_new_pcm_runtime()
478 * rtd = devm_kzalloc(dev, ...);
481 device_unregister(rtd->dev);
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,
489 if (rtd->close_delayed_work_func)
490 rtd->close_delayed_work_func(rtd);
493 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
494 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
496 struct snd_soc_pcm_runtime *rtd;
497 struct snd_soc_component *component;
505 dev = kzalloc(sizeof(struct device), GFP_KERNEL);
509 dev->parent = card->dev;
510 dev->release = soc_release_rtd_dev;
512 dev_set_name(dev, "%s", dai_link->name);
514 ret = device_register(dev);
516 put_device(dev); /* soc_release_rtd_dev */
523 rtd = devm_kzalloc(dev,
525 sizeof(component) * (dai_link->num_cpus +
526 dai_link->num_codecs +
527 dai_link->num_platforms),
530 device_unregister(dev);
535 INIT_LIST_HEAD(&rtd->list);
536 for_each_pcm_streams(stream) {
537 INIT_LIST_HEAD(&rtd->dpcm[stream].be_clients);
538 INIT_LIST_HEAD(&rtd->dpcm[stream].fe_clients);
540 dev_set_drvdata(dev, rtd);
541 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
546 rtd->dais = devm_kcalloc(dev, dai_link->num_cpus + dai_link->num_codecs,
547 sizeof(struct snd_soc_dai *),
553 * dais = [][][][][][][][][][][][][][][][][][]
554 * ^cpu_dais ^codec_dais
555 * |--- num_cpus ---|--- num_codecs --|
557 * snd_soc_rtd_to_cpu()
558 * snd_soc_rtd_to_codec()
561 rtd->dai_link = dai_link;
562 rtd->num = card->num_rtd++;
563 rtd->pmdown_time = pmdown_time; /* default power off timeout */
565 /* see for_each_card_rtds */
566 list_add_tail(&rtd->list, &card->rtd_list);
568 ret = device_add_groups(dev, soc_dev_attr_groups);
575 soc_free_pcm_runtime(rtd);
579 static void snd_soc_fill_dummy_dai(struct snd_soc_card *card)
581 struct snd_soc_dai_link *dai_link;
585 * COMP_DUMMY() creates size 0 array on dai_link.
586 * Fill it as dummy DAI in case of CPU/Codec here.
587 * Do nothing for Platform.
589 for_each_card_prelinks(card, i, dai_link) {
590 if (dai_link->num_cpus == 0 && dai_link->cpus) {
591 dai_link->num_cpus = 1;
592 dai_link->cpus = &snd_soc_dummy_dlc;
594 if (dai_link->num_codecs == 0 && dai_link->codecs) {
595 dai_link->num_codecs = 1;
596 dai_link->codecs = &snd_soc_dummy_dlc;
601 static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
603 struct snd_soc_pcm_runtime *rtd;
605 for_each_card_rtds(card, rtd)
606 flush_delayed_work(&rtd->delayed_work);
609 #ifdef CONFIG_PM_SLEEP
610 static void soc_playback_digital_mute(struct snd_soc_card *card, int mute)
612 struct snd_soc_pcm_runtime *rtd;
613 struct snd_soc_dai *dai;
614 int playback = SNDRV_PCM_STREAM_PLAYBACK;
617 for_each_card_rtds(card, rtd) {
619 if (rtd->dai_link->ignore_suspend)
622 for_each_rtd_dais(rtd, i, dai) {
623 if (snd_soc_dai_stream_active(dai, playback))
624 snd_soc_dai_digital_mute(dai, mute, playback);
629 static void soc_dapm_suspend_resume(struct snd_soc_card *card, int event)
631 struct snd_soc_pcm_runtime *rtd;
634 for_each_card_rtds(card, rtd) {
636 if (rtd->dai_link->ignore_suspend)
639 for_each_pcm_streams(stream)
640 snd_soc_dapm_stream_event(rtd, stream, event);
644 /* powers down audio subsystem for suspend */
645 int snd_soc_suspend(struct device *dev)
647 struct snd_soc_card *card = dev_get_drvdata(dev);
648 struct snd_soc_component *component;
649 struct snd_soc_pcm_runtime *rtd;
652 /* If the card is not initialized yet there is nothing to do */
653 if (!snd_soc_card_is_instantiated(card))
657 * Due to the resume being scheduled into a workqueue we could
658 * suspend before that's finished - wait for it to complete.
660 snd_power_wait(card->snd_card);
662 /* we're going to block userspace touching us until resume completes */
663 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
665 /* mute any active DACs */
666 soc_playback_digital_mute(card, 1);
668 /* suspend all pcms */
669 for_each_card_rtds(card, rtd) {
670 if (rtd->dai_link->ignore_suspend)
673 snd_pcm_suspend_all(rtd->pcm);
676 snd_soc_card_suspend_pre(card);
678 /* close any waiting streams */
679 snd_soc_flush_all_delayed_work(card);
681 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_SUSPEND);
683 /* Recheck all endpoints too, their state is affected by suspend */
684 dapm_mark_endpoints_dirty(card);
685 snd_soc_dapm_sync(&card->dapm);
687 /* suspend all COMPONENTs */
688 for_each_card_rtds(card, rtd) {
690 if (rtd->dai_link->ignore_suspend)
693 for_each_rtd_components(rtd, i, component) {
694 struct snd_soc_dapm_context *dapm =
695 snd_soc_component_get_dapm(component);
698 * ignore if component was already suspended
700 if (snd_soc_component_is_suspended(component))
704 * If there are paths active then the COMPONENT will be
705 * held with bias _ON and should not be suspended.
707 switch (snd_soc_dapm_get_bias_level(dapm)) {
708 case SND_SOC_BIAS_STANDBY:
710 * If the COMPONENT is capable of idle
711 * bias off then being in STANDBY
712 * means it's doing something,
713 * otherwise fall through.
715 if (dapm->idle_bias_off) {
716 dev_dbg(component->dev,
717 "ASoC: idle_bias_off CODEC on over suspend\n");
722 case SND_SOC_BIAS_OFF:
723 snd_soc_component_suspend(component);
724 if (component->regmap)
725 regcache_mark_dirty(component->regmap);
726 /* deactivate pins to sleep state */
727 pinctrl_pm_select_sleep_state(component->dev);
730 dev_dbg(component->dev,
731 "ASoC: COMPONENT is on over suspend\n");
737 snd_soc_card_suspend_post(card);
741 EXPORT_SYMBOL_GPL(snd_soc_suspend);
744 * deferred resume work, so resume can complete before we finished
745 * setting our codec back up, which can be very slow on I2C
747 static void soc_resume_deferred(struct work_struct *work)
749 struct snd_soc_card *card =
750 container_of(work, struct snd_soc_card,
751 deferred_resume_work);
752 struct snd_soc_component *component;
755 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
756 * so userspace apps are blocked from touching us
759 dev_dbg(card->dev, "ASoC: starting resume work\n");
761 /* Bring us up into D2 so that DAPM starts enabling things */
762 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
764 snd_soc_card_resume_pre(card);
766 for_each_card_components(card, component) {
767 if (snd_soc_component_is_suspended(component))
768 snd_soc_component_resume(component);
771 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_RESUME);
773 /* unmute any active DACs */
774 soc_playback_digital_mute(card, 0);
776 snd_soc_card_resume_post(card);
778 dev_dbg(card->dev, "ASoC: resume work completed\n");
780 /* Recheck all endpoints too, their state is affected by suspend */
781 dapm_mark_endpoints_dirty(card);
782 snd_soc_dapm_sync(&card->dapm);
784 /* userspace can access us now we are back as we were before */
785 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
788 /* powers up audio subsystem after a suspend */
789 int snd_soc_resume(struct device *dev)
791 struct snd_soc_card *card = dev_get_drvdata(dev);
792 struct snd_soc_component *component;
794 /* If the card is not initialized yet there is nothing to do */
795 if (!snd_soc_card_is_instantiated(card))
798 /* activate pins from sleep state */
799 for_each_card_components(card, component)
800 if (snd_soc_component_active(component))
801 pinctrl_pm_select_default_state(component->dev);
803 dev_dbg(dev, "ASoC: Scheduling resume work\n");
804 if (!schedule_work(&card->deferred_resume_work))
805 dev_err(dev, "ASoC: resume work item may be lost\n");
809 EXPORT_SYMBOL_GPL(snd_soc_resume);
811 static void soc_resume_init(struct snd_soc_card *card)
813 /* deferred resume work */
814 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
817 #define snd_soc_suspend NULL
818 #define snd_soc_resume NULL
819 static inline void soc_resume_init(struct snd_soc_card *card) { }
822 static struct device_node
823 *soc_component_to_node(struct snd_soc_component *component)
825 struct device_node *of_node;
827 of_node = component->dev->of_node;
828 if (!of_node && component->dev->parent)
829 of_node = component->dev->parent->of_node;
834 struct of_phandle_args *snd_soc_copy_dai_args(struct device *dev, struct of_phandle_args *args)
836 struct of_phandle_args *ret = devm_kzalloc(dev, sizeof(*ret), GFP_KERNEL);
845 EXPORT_SYMBOL_GPL(snd_soc_copy_dai_args);
847 static int snd_soc_is_matching_component(
848 const struct snd_soc_dai_link_component *dlc,
849 struct snd_soc_component *component)
851 struct device_node *component_of_node;
857 struct snd_soc_dai *dai;
859 for_each_component_dais(component, dai)
860 if (snd_soc_is_matching_dai(dlc, dai))
865 component_of_node = soc_component_to_node(component);
867 if (dlc->of_node && component_of_node != dlc->of_node)
869 if (dlc->name && strcmp(component->name, dlc->name))
875 static struct snd_soc_component *soc_find_component(
876 const struct snd_soc_dai_link_component *dlc)
878 struct snd_soc_component *component;
880 lockdep_assert_held(&client_mutex);
885 * It returns *1st* found component, but some driver
886 * has few components by same of_node/name
888 * CPU component and generic DMAEngine component
890 for_each_component(component)
891 if (snd_soc_is_matching_component(dlc, component))
898 * snd_soc_find_dai - Find a registered DAI
900 * @dlc: name of the DAI or the DAI driver and optional component info to match
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.
906 * Return: pointer of DAI, or NULL if not found.
908 struct snd_soc_dai *snd_soc_find_dai(
909 const struct snd_soc_dai_link_component *dlc)
911 struct snd_soc_component *component;
912 struct snd_soc_dai *dai;
914 lockdep_assert_held(&client_mutex);
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))
925 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
927 struct snd_soc_dai *snd_soc_find_dai_with_mutex(
928 const struct snd_soc_dai_link_component *dlc)
930 struct snd_soc_dai *dai;
932 mutex_lock(&client_mutex);
933 dai = snd_soc_find_dai(dlc);
934 mutex_unlock(&client_mutex);
938 EXPORT_SYMBOL_GPL(snd_soc_find_dai_with_mutex);
940 static int soc_dai_link_sanity_check(struct snd_soc_card *card,
941 struct snd_soc_dai_link *link)
944 struct snd_soc_dai_link_component *dlc;
947 for_each_link_codecs(link, i, dlc) {
949 * Codec must be specified by 1 of name or OF node,
950 * not both or neither.
952 if (snd_soc_dlc_component_is_invalid(dlc))
953 goto component_invalid;
955 if (snd_soc_dlc_component_is_empty(dlc))
956 goto component_empty;
958 /* Codec DAI name must be specified */
959 if (snd_soc_dlc_dai_is_empty(dlc))
963 * Defer card registration if codec component is not added to
966 if (!soc_find_component(dlc))
967 goto component_not_found;
971 for_each_link_platforms(link, i, dlc) {
973 * Platform may be specified by either name or OF node, but it
974 * can be left unspecified, then no components will be inserted
977 if (snd_soc_dlc_component_is_invalid(dlc))
978 goto component_invalid;
980 if (snd_soc_dlc_component_is_empty(dlc))
981 goto component_empty;
984 * Defer card registration if platform component is not added to
987 if (!soc_find_component(dlc))
988 goto component_not_found;
992 for_each_link_cpus(link, i, dlc) {
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
998 if (snd_soc_dlc_component_is_invalid(dlc))
999 goto component_invalid;
1002 if (snd_soc_dlc_component_is_empty(dlc)) {
1004 * At least one of CPU DAI name or CPU device name/node must be specified
1006 if (snd_soc_dlc_dai_is_empty(dlc))
1007 goto component_dai_empty;
1010 * Defer card registration if Component is not added
1012 if (!soc_find_component(dlc))
1013 goto component_not_found;
1020 dev_err(card->dev, "ASoC: Both Component name/of_node are set for %s\n", link->name);
1024 dev_err(card->dev, "ASoC: Neither Component name/of_node are set for %s\n", link->name);
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;
1032 dev_err(card->dev, "ASoC: DAI name is not set for %s\n", link->name);
1035 component_dai_empty:
1036 dev_err(card->dev, "ASoC: Neither DAI/Component name/of_node are set for %s\n", link->name);
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 },
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 },
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 },
1071 static int snd_soc_compensate_channel_connection_map(struct snd_soc_card *card,
1072 struct snd_soc_dai_link *dai_link)
1074 struct snd_soc_dai_link_ch_map *ch_maps;
1078 * dai_link->ch_maps indicates how CPU/Codec are connected.
1079 * It will be a map seen from a larger number of DAI.
1081 * soc.h :: [dai_link->ch_maps Image sample]
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)",
1092 /* do nothing if it has own maps */
1093 if (dai_link->ch_maps)
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");
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 */
1109 dai_link->ch_maps = default_ch_map_1codec; /* for N:1 */
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)) {
1117 "unexpected dai_link->ch_maps[%d] index (cpu(%d/%d) codec(%d/%d))",
1119 ch_maps->cpu, dai_link->num_cpus,
1120 ch_maps->codec, dai_link->num_codecs);
1124 dev_dbg(card->dev, " [%d] cpu%d <-> codec%d\n",
1125 i, ch_maps->cpu, ch_maps->codec);
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
1136 * This function removes a pcm_runtime from the ASoC card.
1138 void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
1139 struct snd_soc_pcm_runtime *rtd)
1141 lockdep_assert_held(&client_mutex);
1144 * Notify the machine driver for extra destruction
1146 snd_soc_card_remove_dai_link(card, rtd->dai_link);
1148 soc_free_pcm_runtime(rtd);
1150 EXPORT_SYMBOL_GPL(snd_soc_remove_pcm_runtime);
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
1157 * This function adds a pcm_runtime ASoC card by using dai_link.
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.
1163 static int snd_soc_add_pcm_runtime(struct snd_soc_card *card,
1164 struct snd_soc_dai_link *dai_link)
1166 struct snd_soc_pcm_runtime *rtd;
1167 struct snd_soc_dai_link_component *codec, *platform, *cpu;
1168 struct snd_soc_component *component;
1171 lockdep_assert_held(&client_mutex);
1174 * Notify the machine driver for extra initialization
1176 ret = snd_soc_card_add_dai_link(card, dai_link);
1180 if (dai_link->ignore)
1183 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1185 ret = soc_dai_link_sanity_check(card, dai_link);
1189 rtd = soc_new_pcm_runtime(card, dai_link);
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",
1200 snd_soc_rtd_add_component(rtd, snd_soc_rtd_to_cpu(rtd, i)->component);
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",
1212 snd_soc_rtd_add_component(rtd, snd_soc_rtd_to_codec(rtd, i)->component);
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))
1221 if (snd_soc_component_is_dummy(component) && component->num_dai)
1224 snd_soc_rtd_add_component(rtd, component);
1231 snd_soc_remove_pcm_runtime(card, rtd);
1232 return -EPROBE_DEFER;
1235 int snd_soc_add_pcm_runtimes(struct snd_soc_card *card,
1236 struct snd_soc_dai_link *dai_link,
1239 for (int i = 0; i < num_dai_link; i++) {
1242 ret = snd_soc_compensate_channel_connection_map(card, dai_link + i);
1246 ret = snd_soc_add_pcm_runtime(card, dai_link + i);
1253 EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtimes);
1255 static void snd_soc_runtime_get_dai_fmt(struct snd_soc_pcm_runtime *rtd)
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;
1264 * Get selectable format from each DAIs.
1266 ****************************
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 ****************************
1274 * auto_selectable_formats (= SND_SOC_POSSIBLE_xxx)
1276 * DAI0_: { 0x000F, 0x00F0, 0x0F00 };
1277 * DAI1 : { 0xF000, 0x0F00 };
1280 * "until" will be 3 in this case (MAX array size from DAI0 and DAI1)
1281 * Here is dev_dbg() message and comments
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)
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)
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
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) {
1302 possible_fmt = ULLONG_MAX;
1303 for_each_rtd_dais(rtd, i, dai) {
1306 pri = (j >= i) ? priority : priority - 1;
1307 fmt = snd_soc_dai_get_fmt(dai, pri);
1308 possible_fmt &= fmt;
1318 * convert POSSIBLE_DAIFMT to DAIFMT
1320 * Some basic/default settings on each is defined as 0.
1322 * SND_SOC_DAIFMT_NB_NF
1323 * SND_SOC_DAIFMT_GATED
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.
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.
1333 for (i = 63; i >= 0; i--) {
1335 switch (possible_fmt & pos) {
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;
1351 case SND_SOC_POSSIBLE_DAIFMT_CONT:
1352 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_CONT;
1354 case SND_SOC_POSSIBLE_DAIFMT_GATED:
1355 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_GATED;
1360 case SND_SOC_POSSIBLE_DAIFMT_NB_NF:
1361 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_NF;
1363 case SND_SOC_POSSIBLE_DAIFMT_NB_IF:
1364 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_IF;
1366 case SND_SOC_POSSIBLE_DAIFMT_IB_NF:
1367 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_NF;
1369 case SND_SOC_POSSIBLE_DAIFMT_IB_IF:
1370 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_IF;
1373 * for clock provider / consumer
1375 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFP:
1376 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFP;
1378 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFP:
1379 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFP;
1381 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFC:
1382 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFC;
1384 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFC:
1385 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFC;
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.
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.
1398 * Use manually specified settings if sound card did.
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;
1409 dai_link->dai_fmt |= (dai_fmt & mask);
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
1417 * This function updates the DAI link format for all DAIs connected to the DAI
1418 * link for the specified runtime.
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.
1423 * Returns 0 on success, otherwise a negative error code.
1425 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1426 unsigned int dai_fmt)
1428 struct snd_soc_dai *cpu_dai;
1429 struct snd_soc_dai *codec_dai;
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)
1442 /* Flip the polarity for the "CPU" end of link */
1443 dai_fmt = snd_soc_daifmt_clock_provider_flipped(dai_fmt);
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)
1453 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1455 static int soc_init_pcm_runtime(struct snd_soc_card *card,
1456 struct snd_soc_pcm_runtime *rtd)
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;
1463 /* do machine specific initialization */
1464 ret = snd_soc_link_init(rtd);
1468 snd_soc_runtime_get_dai_fmt(rtd);
1469 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1473 /* add DPCM sysfs entries */
1474 soc_dpcm_debugfs_add(rtd);
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.
1483 for_each_rtd_components(rtd, i, component) {
1484 if (!component->driver->use_dai_pcm_id)
1487 if (rtd->dai_link->no_pcm)
1488 num += component->driver->be_pcm_base;
1490 num = rtd->dai_link->id;
1493 /* create compress_device if possible */
1494 ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1495 if (ret != -ENOTSUPP)
1498 /* create the pcm */
1499 ret = soc_new_pcm(rtd, num);
1501 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1502 dai_link->stream_name, ret);
1506 ret = snd_soc_pcm_dai_new(rtd);
1510 rtd->initialized = true;
1514 snd_soc_link_exit(rtd);
1518 static void soc_set_name_prefix(struct snd_soc_card *card,
1519 struct snd_soc_component *component)
1521 struct device_node *of_node = soc_component_to_node(component);
1525 for (i = 0; i < card->num_configs; i++) {
1526 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1528 if (snd_soc_is_matching_component(&map->dlc, component) &&
1530 component->name_prefix = map->name_prefix;
1536 * If there is no configuration table or no match in the table,
1537 * check if a prefix is provided in the node
1539 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1543 component->name_prefix = str;
1546 static void soc_remove_component(struct snd_soc_component *component,
1550 if (!component->card)
1554 snd_soc_component_remove(component);
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);
1563 static int soc_probe_component(struct snd_soc_card *card,
1564 struct snd_soc_component *component)
1566 struct snd_soc_dapm_context *dapm =
1567 snd_soc_component_get_dapm(component);
1568 struct snd_soc_dai *dai;
1572 if (snd_soc_component_is_dummy(component))
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);
1585 ret = snd_soc_component_module_get_when_probe(component);
1589 component->card = card;
1590 soc_set_name_prefix(card, component);
1592 soc_init_component_debugfs(component);
1594 snd_soc_dapm_init(dapm, card, component);
1596 ret = snd_soc_dapm_new_controls(dapm,
1597 component->driver->dapm_widgets,
1598 component->driver->num_dapm_widgets);
1601 dev_err(component->dev,
1602 "Failed to create new controls %d\n", ret);
1606 for_each_component_dais(component, dai) {
1607 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1609 dev_err(component->dev,
1610 "Failed to create DAI widgets %d\n", ret);
1615 ret = snd_soc_component_probe(component);
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",
1626 * machine specific init
1628 * snd_soc_component_set_aux()
1630 ret = snd_soc_component_init(component);
1634 ret = snd_soc_add_component_controls(component,
1635 component->driver->controls,
1636 component->driver->num_controls);
1640 ret = snd_soc_dapm_add_routes(dapm,
1641 component->driver->dapm_routes,
1642 component->driver->num_dapm_routes);
1644 if (card->disable_route_checks) {
1646 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1650 "%s: snd_soc_dapm_add_routes failed: %d\n",
1656 /* see for_each_card_components */
1657 list_add(&component->card_list, &card->component_dev_list);
1661 soc_remove_component(component, probed);
1666 static void soc_remove_link_dais(struct snd_soc_card *card)
1668 struct snd_soc_pcm_runtime *rtd;
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);
1679 static int soc_probe_link_dais(struct snd_soc_card *card)
1681 struct snd_soc_pcm_runtime *rtd;
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);
1696 static void soc_remove_link_components(struct snd_soc_card *card)
1698 struct snd_soc_component *component;
1699 struct snd_soc_pcm_runtime *rtd;
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)
1708 soc_remove_component(component, 1);
1714 static int soc_probe_link_components(struct snd_soc_card *card)
1716 struct snd_soc_component *component;
1717 struct snd_soc_pcm_runtime *rtd;
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)
1726 ret = soc_probe_component(card, component);
1736 static void soc_unbind_aux_dev(struct snd_soc_card *card)
1738 struct snd_soc_component *component, *_component;
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);
1747 static int soc_bind_aux_dev(struct snd_soc_card *card)
1749 struct snd_soc_component *component;
1750 struct snd_soc_aux_dev *aux;
1753 for_each_card_pre_auxs(card, i, aux) {
1754 /* codecs, usually analog devices */
1755 component = soc_find_component(&aux->dlc);
1757 return -EPROBE_DEFER;
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);
1767 static int soc_probe_aux_devices(struct snd_soc_card *card)
1769 struct snd_soc_component *component;
1773 for_each_comp_order(order) {
1774 for_each_card_auxs(card, component) {
1775 if (component->driver->probe_order != order)
1778 ret = soc_probe_component(card, component);
1787 static void soc_remove_aux_devices(struct snd_soc_card *card)
1789 struct snd_soc_component *comp, *_comp;
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);
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.
1806 static const char * const dmi_blacklist[] = {
1807 "To be filled by OEM",
1810 "Board Manufacturer",
1811 "Board Vendor Name",
1812 "Board Product Name",
1813 NULL, /* terminator */
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.
1821 static void cleanup_dmi_name(char *name)
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] == '-')
1837 * Check if a DMI field is valid, i.e. not containing any string
1838 * in the black list.
1840 static int is_dmi_valid(const char *field)
1844 while (dmi_blacklist[i]) {
1845 if (strstr(field, dmi_blacklist[i]))
1854 * Append a string to card->dmi_longname with character cleanups.
1856 static void append_dmi_string(struct snd_soc_card *card, const char *str)
1858 char *dst = card->dmi_longname;
1859 size_t dst_len = sizeof(card->dmi_longname);
1863 snprintf(dst + len, dst_len - len, "-%s", str);
1865 len++; /* skip the separator "-" */
1867 cleanup_dmi_name(dst + len);
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.
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.
1886 * Possible card long names may be:
1887 * DellInc.-XPS139343-01-0310JH
1888 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1889 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1891 * This function also supports flavoring the card longname to provide
1892 * the extra differentiation, like "vendor-product-version-board-flavor".
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.
1899 * Returns 0 on success, otherwise a negative error code.
1901 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1903 const char *vendor, *product, *board;
1905 if (card->long_name)
1906 return 0; /* long name already set by driver or from DMI */
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");
1918 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1919 cleanup_dmi_name(card->dmi_longname);
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);
1925 append_dmi_string(card, product);
1928 * some vendors like Lenovo may only put a self-explanatory
1929 * name in the product version field
1931 if (product_version && is_dmi_valid(product_version))
1932 append_dmi_string(card, product_version);
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");
1945 /* Add flavour to dmi long name */
1947 append_dmi_string(card, flavour);
1949 /* set the card long name */
1950 card->long_name = card->dmi_longname;
1954 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1955 #endif /* CONFIG_DMI */
1957 static void soc_check_tplg_fes(struct snd_soc_card *card)
1959 struct snd_soc_component *component;
1960 const struct snd_soc_component_driver *comp_drv;
1961 struct snd_soc_dai_link *dai_link;
1964 for_each_component(component) {
1966 /* does this component override BEs ? */
1967 if (!component->driver->ignore_machine)
1970 /* for this machine ? */
1971 if (!strcmp(component->driver->ignore_machine,
1972 card->dev->driver->name))
1974 if (strcmp(component->driver->ignore_machine,
1975 dev_name(card->dev)))
1978 /* machine matches, so override the rtd data */
1979 for_each_card_prelinks(card, i, dai_link) {
1981 /* ignore this FE */
1982 if (dai_link->dynamic) {
1983 dai_link->ignore = true;
1987 dev_dbg(card->dev, "info: override BE DAI link %s\n",
1988 card->dai_link[i].name);
1990 /* override platform component */
1991 if (!dai_link->platforms) {
1992 dev_err(card->dev, "init platform error");
1996 if (component->dev->of_node)
1997 dai_link->platforms->of_node = component->dev->of_node;
1999 dai_link->platforms->name = component->name;
2001 /* convert non BE into BE */
2002 if (!dai_link->no_pcm) {
2003 dai_link->no_pcm = 1;
2005 if (dai_link->dpcm_playback)
2007 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_playback=1\n",
2009 if (dai_link->dpcm_capture)
2011 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_capture=1\n",
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;
2023 * override any BE fixups
2025 * snd_soc_link_be_hw_params_fixup()
2027 dai_link->be_hw_params_fixup =
2028 component->driver->be_hw_params_fixup;
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.
2034 if (!dai_link->stream_name)
2035 dai_link->stream_name = dai_link->name;
2038 /* Inform userspace we are using alternate topology */
2039 if (component->driver->topology_name_prefix) {
2041 /* topology shortname created? */
2042 if (!card->topology_shortname_created) {
2043 comp_drv = component->driver;
2045 snprintf(card->topology_shortname, 32, "%s-%s",
2046 comp_drv->topology_name_prefix,
2048 card->topology_shortname_created = true;
2051 /* use topology shortname */
2052 card->name = card->topology_shortname;
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)
2063 const char *src = name1 ? name1 : name2;
2066 snprintf(name, len, "%s", src);
2068 if (name != card->snd_card->driver)
2072 * Name normalization (driver field)
2074 * The driver name is somewhat special, as it's used as a key for
2075 * searches in the user-space.
2078 * "abcd??efg" -> "abcd__efg"
2080 for (i = 0; i < len; i++) {
2087 if (!isalnum(name[i]))
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.
2098 if (strlen(src) > len - 1)
2099 dev_err(card->dev, "ASoC: driver name too long '%s' -> '%s'\n", src, name);
2102 static void soc_cleanup_card_resources(struct snd_soc_card *card)
2104 struct snd_soc_pcm_runtime *rtd, *n;
2107 snd_card_disconnect_sync(card->snd_card);
2109 snd_soc_dapm_shutdown(card);
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);
2119 for_each_card_rtds_safe(card, rtd, n)
2120 snd_soc_remove_pcm_runtime(card, rtd);
2122 /* remove auxiliary devices */
2123 soc_remove_aux_devices(card);
2124 soc_unbind_aux_dev(card);
2126 snd_soc_dapm_free(&card->dapm);
2127 soc_cleanup_card_debugfs(card);
2129 /* remove the card */
2130 snd_soc_card_remove(card);
2132 if (card->snd_card) {
2133 snd_card_free(card->snd_card);
2134 card->snd_card = NULL;
2138 static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
2140 if (snd_soc_card_is_instantiated(card)) {
2141 card->instantiated = false;
2142 snd_soc_flush_all_delayed_work(card);
2144 soc_cleanup_card_resources(card);
2146 list_add(&card->list, &unbind_card_list);
2149 list_del(&card->list);
2153 static int snd_soc_bind_card(struct snd_soc_card *card)
2155 struct snd_soc_pcm_runtime *rtd;
2156 struct snd_soc_component *component;
2159 mutex_lock(&client_mutex);
2160 snd_soc_card_mutex_lock_root(card);
2162 snd_soc_fill_dummy_dai(card);
2164 snd_soc_dapm_init(&card->dapm, card, NULL);
2166 /* check whether any platform is ignore machine FE and using topology */
2167 soc_check_tplg_fes(card);
2169 /* bind aux_devs too */
2170 ret = soc_bind_aux_dev(card);
2174 /* add predefined DAI links to the list */
2176 ret = snd_soc_add_pcm_runtimes(card, card->dai_link, card->num_links);
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);
2185 "ASoC: can't create sound card for card %s: %d\n",
2190 soc_init_card_debugfs(card);
2192 soc_resume_init(card);
2194 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2195 card->num_dapm_widgets);
2199 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2200 card->num_of_dapm_widgets);
2204 /* initialise the sound card only once */
2205 ret = snd_soc_card_probe(card);
2209 /* probe all components used by DAI links on this card */
2210 ret = soc_probe_link_components(card);
2212 if (ret != -EPROBE_DEFER) {
2214 "ASoC: failed to instantiate card %d\n", ret);
2219 /* probe auxiliary components */
2220 ret = soc_probe_aux_devices(card);
2223 "ASoC: failed to probe aux component %d\n", ret);
2227 /* probe all DAI links on this card */
2228 ret = soc_probe_link_dais(card);
2231 "ASoC: failed to instantiate card %d\n", ret);
2235 for_each_card_rtds(card, rtd) {
2236 ret = soc_init_pcm_runtime(card, rtd);
2241 snd_soc_dapm_link_dai_widgets(card);
2242 snd_soc_dapm_connect_dai_link_widgets(card);
2244 ret = snd_soc_add_card_controls(card, card->controls,
2245 card->num_controls);
2249 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2250 card->num_dapm_routes);
2252 if (card->disable_route_checks) {
2254 "%s: disable_route_checks set, ignoring errors on add_routes\n",
2258 "%s: snd_soc_dapm_add_routes failed: %d\n",
2264 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2265 card->num_of_dapm_routes);
2269 /* try to set some sane longname if DMI is available */
2270 snd_soc_set_dmi_name(card, NULL);
2272 soc_setup_card_name(card, card->snd_card->shortname,
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);
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);
2286 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
2292 ret = snd_soc_card_late_probe(card);
2296 snd_soc_dapm_new_widgets(card);
2297 snd_soc_card_fixup_controls(card);
2299 ret = snd_card_register(card->snd_card);
2301 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2306 card->instantiated = 1;
2307 dapm_mark_endpoints_dirty(card);
2308 snd_soc_dapm_sync(&card->dapm);
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);
2317 soc_cleanup_card_resources(card);
2319 snd_soc_card_mutex_unlock(card);
2320 mutex_unlock(&client_mutex);
2325 /* probes a new socdev */
2326 static int soc_probe(struct platform_device *pdev)
2328 struct snd_soc_card *card = platform_get_drvdata(pdev);
2331 * no card, so machine driver should be registering card
2332 * we should not be here in that case so ret error
2337 dev_warn(&pdev->dev,
2338 "ASoC: machine %s should use snd_soc_register_card()\n",
2341 /* Bodge while we unpick instantiation */
2342 card->dev = &pdev->dev;
2344 return devm_snd_soc_register_card(&pdev->dev, card);
2347 int snd_soc_poweroff(struct device *dev)
2349 struct snd_soc_card *card = dev_get_drvdata(dev);
2350 struct snd_soc_component *component;
2352 if (!snd_soc_card_is_instantiated(card))
2356 * Flush out pmdown_time work - we actually do want to run it
2357 * now, we're shutting down so no imminent restart.
2359 snd_soc_flush_all_delayed_work(card);
2361 snd_soc_dapm_shutdown(card);
2363 /* deactivate pins to sleep state */
2364 for_each_card_components(card, component)
2365 pinctrl_pm_select_sleep_state(component->dev);
2369 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
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,
2379 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2381 /* ASoC platform driver */
2382 static struct platform_driver soc_driver = {
2384 .name = "soc-audio",
2385 .pm = &snd_soc_pm_ops,
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
2397 * Create a new mixer control from a template control.
2399 * Returns 0 for success, else error.
2401 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2402 void *data, const char *long_name,
2405 struct snd_kcontrol_new template;
2406 struct snd_kcontrol *kcontrol;
2409 memcpy(&template, _template, sizeof(template));
2413 long_name = template.name;
2416 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2420 template.name = name;
2422 template.name = long_name;
2425 kcontrol = snd_ctl_new1(&template, data);
2431 EXPORT_SYMBOL_GPL(snd_soc_cnew);
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)
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));
2444 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2445 control->name, err);
2454 * snd_soc_add_component_controls - Add an array of controls to a component.
2456 * @component: Component to add controls to
2457 * @controls: Array of controls to add
2458 * @num_controls: Number of elements in the array
2460 * Return: 0 for success, else error.
2462 int snd_soc_add_component_controls(struct snd_soc_component *component,
2463 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2465 struct snd_card *card = component->card->snd_card;
2467 return snd_soc_add_controls(card, component->dev, controls,
2468 num_controls, component->name_prefix, component);
2470 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2473 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2474 * Convenience function to add a list of controls.
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
2480 * Return 0 for success, else error.
2482 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2483 const struct snd_kcontrol_new *controls, int num_controls)
2485 struct snd_card *card = soc_card->snd_card;
2487 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2490 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2493 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2494 * Convenience function to add a list of controls.
2496 * @dai: DAI to add controls to
2497 * @controls: array of controls to add
2498 * @num_controls: number of elements in the array
2500 * Return 0 for success, else error.
2502 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2503 const struct snd_kcontrol_new *controls, int num_controls)
2505 struct snd_card *card = dai->component->card->snd_card;
2507 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2510 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2513 * snd_soc_register_card - Register a card with the ASoC core
2515 * @card: Card to register
2518 int snd_soc_register_card(struct snd_soc_card *card)
2520 if (!card->name || !card->dev)
2523 dev_set_drvdata(card->dev, card);
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);
2535 card->instantiated = 0;
2536 mutex_init(&card->mutex);
2537 mutex_init(&card->dapm_mutex);
2538 mutex_init(&card->pcm_mutex);
2540 return snd_soc_bind_card(card);
2542 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2545 * snd_soc_unregister_card - Unregister a card with the ASoC core
2547 * @card: Card to unregister
2550 void snd_soc_unregister_card(struct snd_soc_card *card)
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);
2557 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2560 * Simplify DAI link configuration by removing ".-1" from device names
2561 * and sanitizing names.
2563 static char *fmt_single_name(struct device *dev, int *id)
2565 const char *devname = dev_name(dev);
2567 unsigned int id1, id2;
2569 if (devname == NULL)
2572 name = devm_kstrdup(dev, devname, GFP_KERNEL);
2576 /* are we a "%s.%d" name (platform and SPI components) */
2577 found = strstr(name, dev->driver->name);
2580 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2582 /* discard ID from name if ID == -1 */
2584 found[strlen(dev->driver->name)] = '\0';
2587 /* I2C component devices are named "bus-addr" */
2588 } else if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2590 /* create unique ID number from I2C addr and bus */
2591 *id = ((id1 & 0xffff) << 16) + id2;
2593 devm_kfree(dev, name);
2595 /* sanitize component name for DAI link creation */
2596 name = devm_kasprintf(dev, GFP_KERNEL, "%s.%s", dev->driver->name, devname);
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).
2608 static inline char *fmt_multiple_name(struct device *dev,
2609 struct snd_soc_dai_driver *dai_drv)
2611 if (dai_drv->name == NULL) {
2613 "ASoC: error - multiple DAI %s registered with no name\n",
2618 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2621 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2623 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2624 list_del(&dai->list);
2626 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2629 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
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;
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.
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)
2644 struct device *dev = component->dev;
2645 struct snd_soc_dai *dai;
2647 lockdep_assert_held(&client_mutex);
2649 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
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.
2661 if (legacy_dai_naming &&
2662 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2663 dai->name = fmt_single_name(dev, &dai->id);
2665 dai->name = fmt_multiple_name(dev, dai_drv);
2667 dai->id = dai_drv->id;
2669 dai->id = component->num_dai;
2674 dai->component = component;
2676 dai->driver = dai_drv;
2678 /* see for_each_component_dais */
2679 list_add_tail(&dai->list, &component->dai_list);
2680 component->num_dai++;
2682 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2685 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2688 * snd_soc_unregister_dais - Unregister DAIs from the ASoC core
2690 * @component: The component for which the DAIs should be unregistered
2692 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2694 struct snd_soc_dai *dai, *_dai;
2696 for_each_component_dais_safe(component, dai, _dai)
2697 snd_soc_unregister_dai(dai);
2701 * snd_soc_register_dais - Register a DAI with the ASoC core
2703 * @component: The component the DAIs are registered for
2704 * @dai_drv: DAI driver to use for the DAIs
2705 * @count: Number of DAIs
2707 static int snd_soc_register_dais(struct snd_soc_component *component,
2708 struct snd_soc_dai_driver *dai_drv,
2711 struct snd_soc_dai *dai;
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);
2727 snd_soc_unregister_dais(component);
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_),
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.
2758 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
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];
2767 static void snd_soc_try_rebind_card(void)
2769 struct snd_soc_card *card, *c;
2771 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2772 if (!snd_soc_bind_card(card))
2773 list_del(&card->list);
2776 static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2778 struct snd_soc_card *card = component->card;
2780 snd_soc_unregister_dais(component);
2783 snd_soc_unbind_card(card, false);
2785 list_del(&component->list);
2788 int snd_soc_component_initialize(struct snd_soc_component *component,
2789 const struct snd_soc_component_driver *driver,
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);
2798 component->name = fmt_single_name(dev, &component->id);
2799 if (!component->name) {
2800 dev_err(dev, "ASoC: Failed to allocate name\n");
2804 component->dev = dev;
2805 component->driver = driver;
2807 #ifdef CONFIG_DEBUG_FS
2808 if (!component->debugfs_prefix)
2809 component->debugfs_prefix = driver->debugfs_prefix;
2814 EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
2816 int snd_soc_add_component(struct snd_soc_component *component,
2817 struct snd_soc_dai_driver *dai_drv,
2823 mutex_lock(&client_mutex);
2825 if (component->driver->endianness) {
2826 for (i = 0; i < num_dai; i++) {
2827 convert_endianness_formats(&dai_drv[i].playback);
2828 convert_endianness_formats(&dai_drv[i].capture);
2832 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2834 dev_err(component->dev, "ASoC: Failed to register DAIs: %d\n",
2839 if (!component->driver->write && !component->driver->read) {
2840 if (!component->regmap)
2841 component->regmap = dev_get_regmap(component->dev,
2843 if (component->regmap)
2844 snd_soc_component_setup_regmap(component);
2847 /* see for_each_component */
2848 list_add(&component->list, &component_list);
2852 snd_soc_del_component_unlocked(component);
2854 mutex_unlock(&client_mutex);
2857 snd_soc_try_rebind_card();
2861 EXPORT_SYMBOL_GPL(snd_soc_add_component);
2863 int snd_soc_register_component(struct device *dev,
2864 const struct snd_soc_component_driver *component_driver,
2865 struct snd_soc_dai_driver *dai_drv,
2868 struct snd_soc_component *component;
2871 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2875 ret = snd_soc_component_initialize(component, component_driver, dev);
2879 return snd_soc_add_component(component, dai_drv, num_dai);
2881 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2884 * snd_soc_unregister_component_by_driver - Unregister component using a given driver
2885 * from the ASoC core
2887 * @dev: The device to unregister
2888 * @component_driver: The component driver to unregister
2890 void snd_soc_unregister_component_by_driver(struct device *dev,
2891 const struct snd_soc_component_driver *component_driver)
2893 struct snd_soc_component *component;
2895 if (!component_driver)
2898 mutex_lock(&client_mutex);
2899 component = snd_soc_lookup_component_nolocked(dev, component_driver->name);
2903 snd_soc_del_component_unlocked(component);
2906 mutex_unlock(&client_mutex);
2908 EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
2911 * snd_soc_unregister_component - Unregister all related component
2912 * from the ASoC core
2914 * @dev: The device to unregister
2916 void snd_soc_unregister_component(struct device *dev)
2918 mutex_lock(&client_mutex);
2920 struct snd_soc_component *component = snd_soc_lookup_component_nolocked(dev, NULL);
2925 snd_soc_del_component_unlocked(component);
2927 mutex_unlock(&client_mutex);
2929 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2931 /* Retrieve a card's name from device tree */
2932 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2933 const char *propname)
2935 struct device_node *np;
2939 pr_err("card->dev is not set before calling %s\n", __func__);
2943 np = card->dev->of_node;
2945 ret = of_property_read_string_index(np, propname, 0, &card->name);
2947 * EINVAL means the property does not exist. This is fine providing
2948 * card->name was previously set, which is checked later in
2949 * snd_soc_register_card.
2951 if (ret < 0 && ret != -EINVAL) {
2953 "ASoC: Property '%s' could not be read: %d\n",
2960 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2962 static const struct snd_soc_dapm_widget simple_widgets[] = {
2963 SND_SOC_DAPM_MIC("Microphone", NULL),
2964 SND_SOC_DAPM_LINE("Line", NULL),
2965 SND_SOC_DAPM_HP("Headphone", NULL),
2966 SND_SOC_DAPM_SPK("Speaker", NULL),
2969 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2970 const char *propname)
2972 struct device_node *np = card->dev->of_node;
2973 struct snd_soc_dapm_widget *widgets;
2974 const char *template, *wname;
2975 int i, j, num_widgets;
2977 num_widgets = of_property_count_strings(np, propname);
2978 if (num_widgets < 0) {
2980 "ASoC: Property '%s' does not exist\n", propname);
2984 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2988 if (num_widgets & 1) {
2990 "ASoC: Property '%s' length is not even\n", propname);
2996 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3000 "ASoC: Could not allocate memory for widgets\n");
3004 for (i = 0; i < num_widgets; i++) {
3005 int ret = of_property_read_string_index(np, propname,
3009 "ASoC: Property '%s' index %d read error:%d\n",
3010 propname, 2 * i, ret);
3014 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3015 if (!strncmp(template, simple_widgets[j].name,
3016 strlen(simple_widgets[j].name))) {
3017 widgets[i] = simple_widgets[j];
3022 if (j >= ARRAY_SIZE(simple_widgets)) {
3024 "ASoC: DAPM widget '%s' is not supported\n",
3029 ret = of_property_read_string_index(np, propname,
3034 "ASoC: Property '%s' index %d read error:%d\n",
3035 propname, (2 * i) + 1, ret);
3039 widgets[i].name = wname;
3042 card->of_dapm_widgets = widgets;
3043 card->num_of_dapm_widgets = num_widgets;
3047 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3049 int snd_soc_of_parse_pin_switches(struct snd_soc_card *card, const char *prop)
3051 const unsigned int nb_controls_max = 16;
3052 const char **strings, *control_name;
3053 struct snd_kcontrol_new *controls;
3054 struct device *dev = card->dev;
3055 unsigned int i, nb_controls;
3058 if (!of_property_read_bool(dev->of_node, prop))
3061 strings = devm_kcalloc(dev, nb_controls_max,
3062 sizeof(*strings), GFP_KERNEL);
3066 ret = of_property_read_string_array(dev->of_node, prop,
3067 strings, nb_controls_max);
3071 nb_controls = (unsigned int)ret;
3073 controls = devm_kcalloc(dev, nb_controls,
3074 sizeof(*controls), GFP_KERNEL);
3078 for (i = 0; i < nb_controls; i++) {
3079 control_name = devm_kasprintf(dev, GFP_KERNEL,
3080 "%s Switch", strings[i]);
3084 controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
3085 controls[i].name = control_name;
3086 controls[i].info = snd_soc_dapm_info_pin_switch;
3087 controls[i].get = snd_soc_dapm_get_pin_switch;
3088 controls[i].put = snd_soc_dapm_put_pin_switch;
3089 controls[i].private_value = (unsigned long)strings[i];
3092 card->controls = controls;
3093 card->num_controls = nb_controls;
3097 EXPORT_SYMBOL_GPL(snd_soc_of_parse_pin_switches);
3099 int snd_soc_of_get_slot_mask(struct device_node *np,
3100 const char *prop_name,
3104 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3110 for (i = 0; i < val; i++)
3111 if (be32_to_cpup(&of_slot_mask[i]))
3116 EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
3118 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3119 unsigned int *tx_mask,
3120 unsigned int *rx_mask,
3121 unsigned int *slots,
3122 unsigned int *slot_width)
3128 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3130 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3132 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3133 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3141 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3142 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3152 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3154 void snd_soc_dlc_use_cpu_as_platform(struct snd_soc_dai_link_component *platforms,
3155 struct snd_soc_dai_link_component *cpus)
3157 platforms->of_node = cpus->of_node;
3158 platforms->dai_args = cpus->dai_args;
3160 EXPORT_SYMBOL_GPL(snd_soc_dlc_use_cpu_as_platform);
3162 void snd_soc_of_parse_node_prefix(struct device_node *np,
3163 struct snd_soc_codec_conf *codec_conf,
3164 struct device_node *of_node,
3165 const char *propname)
3170 ret = of_property_read_string(np, propname, &str);
3172 /* no prefix is not error */
3176 codec_conf->dlc.of_node = of_node;
3177 codec_conf->name_prefix = str;
3179 EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
3181 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3182 const char *propname)
3184 struct device_node *np = card->dev->of_node;
3186 struct snd_soc_dapm_route *routes;
3189 num_routes = of_property_count_strings(np, propname);
3190 if (num_routes < 0 || num_routes & 1) {
3192 "ASoC: Property '%s' does not exist or its length is not even\n",
3198 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3202 "ASoC: Could not allocate DAPM route table\n");
3206 for (i = 0; i < num_routes; i++) {
3207 int ret = of_property_read_string_index(np, propname,
3208 2 * i, &routes[i].sink);
3211 "ASoC: Property '%s' index %d could not be read: %d\n",
3212 propname, 2 * i, ret);
3215 ret = of_property_read_string_index(np, propname,
3216 (2 * i) + 1, &routes[i].source);
3219 "ASoC: Property '%s' index %d could not be read: %d\n",
3220 propname, (2 * i) + 1, ret);
3225 card->num_of_dapm_routes = num_routes;
3226 card->of_dapm_routes = routes;
3230 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3232 int snd_soc_of_parse_aux_devs(struct snd_soc_card *card, const char *propname)
3234 struct device_node *node = card->dev->of_node;
3235 struct snd_soc_aux_dev *aux;
3238 num = of_count_phandle_with_args(node, propname, NULL);
3239 if (num == -ENOENT) {
3241 } else if (num < 0) {
3242 dev_err(card->dev, "ASOC: Property '%s' could not be read: %d\n",
3247 aux = devm_kcalloc(card->dev, num, sizeof(*aux), GFP_KERNEL);
3250 card->aux_dev = aux;
3251 card->num_aux_devs = num;
3253 for_each_card_pre_auxs(card, i, aux) {
3254 aux->dlc.of_node = of_parse_phandle(node, propname, i);
3255 if (!aux->dlc.of_node)
3261 EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs);
3263 unsigned int snd_soc_daifmt_clock_provider_flipped(unsigned int dai_fmt)
3265 unsigned int inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
3267 switch (dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
3268 case SND_SOC_DAIFMT_CBP_CFP:
3269 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFC;
3271 case SND_SOC_DAIFMT_CBP_CFC:
3272 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFP;
3274 case SND_SOC_DAIFMT_CBC_CFP:
3275 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFC;
3277 case SND_SOC_DAIFMT_CBC_CFC:
3278 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFP;
3284 EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_flipped);
3286 unsigned int snd_soc_daifmt_clock_provider_from_bitmap(unsigned int bit_frame)
3289 * bit_frame is return value from
3290 * snd_soc_daifmt_parse_clock_provider_raw()
3294 switch (bit_frame) {
3296 return SND_SOC_DAIFMT_CBP_CFP;
3298 return SND_SOC_DAIFMT_CBP_CFC;
3300 return SND_SOC_DAIFMT_CBC_CFP;
3302 return SND_SOC_DAIFMT_CBC_CFC;
3307 EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_from_bitmap);
3309 unsigned int snd_soc_daifmt_parse_format(struct device_node *np,
3314 unsigned int format = 0;
3320 } of_fmt_table[] = {
3321 { "i2s", SND_SOC_DAIFMT_I2S },
3322 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3323 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3324 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3325 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3326 { "ac97", SND_SOC_DAIFMT_AC97 },
3327 { "pdm", SND_SOC_DAIFMT_PDM},
3328 { "msb", SND_SOC_DAIFMT_MSB },
3329 { "lsb", SND_SOC_DAIFMT_LSB },
3336 * check "dai-format = xxx"
3337 * or "[prefix]format = xxx"
3338 * SND_SOC_DAIFMT_FORMAT_MASK area
3340 ret = of_property_read_string(np, "dai-format", &str);
3342 snprintf(prop, sizeof(prop), "%sformat", prefix);
3343 ret = of_property_read_string(np, prop, &str);
3348 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3349 if (strcmp(str, of_fmt_table[i].name) == 0) {
3350 format |= of_fmt_table[i].val;
3357 * check "[prefix]continuous-clock"
3358 * SND_SOC_DAIFMT_CLOCK_MASK area
3360 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3361 if (of_property_read_bool(np, prop))
3362 format |= SND_SOC_DAIFMT_CONT;
3364 format |= SND_SOC_DAIFMT_GATED;
3367 * check "[prefix]bitclock-inversion"
3368 * check "[prefix]frame-inversion"
3369 * SND_SOC_DAIFMT_INV_MASK area
3371 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3372 bit = !!of_get_property(np, prop, NULL);
3374 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3375 frame = !!of_get_property(np, prop, NULL);
3377 switch ((bit << 4) + frame) {
3379 format |= SND_SOC_DAIFMT_IB_IF;
3382 format |= SND_SOC_DAIFMT_IB_NF;
3385 format |= SND_SOC_DAIFMT_NB_IF;
3388 /* SND_SOC_DAIFMT_NB_NF is default */
3394 EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_format);
3396 unsigned int snd_soc_daifmt_parse_clock_provider_raw(struct device_node *np,
3398 struct device_node **bitclkmaster,
3399 struct device_node **framemaster)
3402 unsigned int bit, frame;
3408 * check "[prefix]bitclock-master"
3409 * check "[prefix]frame-master"
3411 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3412 bit = !!of_get_property(np, prop, NULL);
3413 if (bit && bitclkmaster)
3414 *bitclkmaster = of_parse_phandle(np, prop, 0);
3416 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3417 frame = !!of_get_property(np, prop, NULL);
3418 if (frame && framemaster)
3419 *framemaster = of_parse_phandle(np, prop, 0);
3423 * It will be parameter of
3424 * snd_soc_daifmt_clock_provider_from_bitmap()
3426 return (bit << 4) + frame;
3428 EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_clock_provider_raw);
3430 int snd_soc_get_stream_cpu(struct snd_soc_dai_link *dai_link, int stream)
3436 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3437 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3440 * CPU : SNDRV_PCM_STREAM_CAPTURE
3441 * Codec: SNDRV_PCM_STREAM_CAPTURE
3443 if (!dai_link->c2c_params)
3450 * CPU : SNDRV_PCM_STREAM_CAPTURE
3451 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3454 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3455 * Codec: SNDRV_PCM_STREAM_CAPTURE
3457 if (stream == SNDRV_PCM_STREAM_CAPTURE)
3458 return SNDRV_PCM_STREAM_PLAYBACK;
3460 return SNDRV_PCM_STREAM_CAPTURE;
3462 EXPORT_SYMBOL_GPL(snd_soc_get_stream_cpu);
3464 int snd_soc_get_dai_id(struct device_node *ep)
3466 struct snd_soc_component *component;
3467 struct snd_soc_dai_link_component dlc = {
3468 .of_node = of_graph_get_port_parent(ep),
3474 * For example HDMI case, HDMI has video/sound port,
3475 * but ALSA SoC needs sound port number only.
3476 * Thus counting HDMI DT port/endpoint doesn't work.
3477 * Then, it should have .of_xlate_dai_id
3480 mutex_lock(&client_mutex);
3481 component = soc_find_component(&dlc);
3483 ret = snd_soc_component_of_xlate_dai_id(component, ep);
3484 mutex_unlock(&client_mutex);
3486 of_node_put(dlc.of_node);
3490 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3492 int snd_soc_get_dlc(const struct of_phandle_args *args, struct snd_soc_dai_link_component *dlc)
3494 struct snd_soc_component *pos;
3495 int ret = -EPROBE_DEFER;
3497 mutex_lock(&client_mutex);
3498 for_each_component(pos) {
3499 struct device_node *component_of_node = soc_component_to_node(pos);
3501 if (component_of_node != args->np || !pos->num_dai)
3504 ret = snd_soc_component_of_xlate_dai_name(pos, args, &dlc->dai_name);
3505 if (ret == -ENOTSUPP) {
3506 struct snd_soc_dai *dai;
3509 switch (args->args_count) {
3511 id = 0; /* same as dai_drv[0] */
3521 if (id < 0 || id >= pos->num_dai) {
3528 /* find target DAI */
3529 for_each_component_dais(pos, dai) {
3535 dlc->dai_name = snd_soc_dai_name_get(dai);
3538 * if another error than ENOTSUPP is returned go on and
3539 * check if another component is provided with the same
3540 * node. This may happen if a device provides several
3550 dlc->of_node = args->np;
3552 mutex_unlock(&client_mutex);
3555 EXPORT_SYMBOL_GPL(snd_soc_get_dlc);
3557 int snd_soc_of_get_dlc(struct device_node *of_node,
3558 struct of_phandle_args *args,
3559 struct snd_soc_dai_link_component *dlc,
3562 struct of_phandle_args __args;
3568 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3569 "#sound-dai-cells", index, args);
3573 return snd_soc_get_dlc(args, dlc);
3575 EXPORT_SYMBOL_GPL(snd_soc_of_get_dlc);
3577 int snd_soc_get_dai_name(const struct of_phandle_args *args,
3578 const char **dai_name)
3580 struct snd_soc_dai_link_component dlc;
3581 int ret = snd_soc_get_dlc(args, &dlc);
3584 *dai_name = dlc.dai_name;
3588 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3590 int snd_soc_of_get_dai_name(struct device_node *of_node,
3591 const char **dai_name, int index)
3593 struct snd_soc_dai_link_component dlc;
3594 int ret = snd_soc_of_get_dlc(of_node, NULL, &dlc, index);
3597 *dai_name = dlc.dai_name;
3601 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3603 struct snd_soc_dai *snd_soc_get_dai_via_args(struct of_phandle_args *dai_args)
3605 struct snd_soc_dai *dai;
3606 struct snd_soc_component *component;
3608 mutex_lock(&client_mutex);
3609 for_each_component(component) {
3610 for_each_component_dais(component, dai)
3611 if (snd_soc_is_match_dai_args(dai->driver->dai_args, dai_args))
3616 mutex_unlock(&client_mutex);
3619 EXPORT_SYMBOL_GPL(snd_soc_get_dai_via_args);
3621 static void __snd_soc_of_put_component(struct snd_soc_dai_link_component *component)
3623 if (component->of_node) {
3624 of_node_put(component->of_node);
3625 component->of_node = NULL;
3629 static int __snd_soc_of_get_dai_link_component_alloc(
3630 struct device *dev, struct device_node *of_node,
3631 struct snd_soc_dai_link_component **ret_component,
3634 struct snd_soc_dai_link_component *component;
3637 /* Count the number of CPUs/CODECs */
3638 num = of_count_phandle_with_args(of_node, "sound-dai", "#sound-dai-cells");
3641 dev_err(dev, "No 'sound-dai' property\n");
3643 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3646 component = devm_kcalloc(dev, num, sizeof(*component), GFP_KERNEL);
3650 *ret_component = component;
3657 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3658 * @dai_link: DAI link
3660 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3662 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3664 struct snd_soc_dai_link_component *component;
3667 for_each_link_codecs(dai_link, index, component)
3668 __snd_soc_of_put_component(component);
3670 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3673 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3675 * @of_node: Device node
3676 * @dai_link: DAI link
3678 * Builds an array of CODEC DAI components from the DAI link property
3680 * The array is set in the DAI link and the number of DAIs is set accordingly.
3681 * The device nodes in the array (of_node) must be dereferenced by calling
3682 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3684 * Returns 0 for success
3686 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3687 struct device_node *of_node,
3688 struct snd_soc_dai_link *dai_link)
3690 struct snd_soc_dai_link_component *component;
3693 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3694 &dai_link->codecs, &dai_link->num_codecs);
3698 /* Parse the list */
3699 for_each_link_codecs(dai_link, index, component) {
3700 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3706 snd_soc_of_put_dai_link_codecs(dai_link);
3707 dai_link->codecs = NULL;
3708 dai_link->num_codecs = 0;
3711 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3714 * snd_soc_of_put_dai_link_cpus - Dereference device nodes in the codecs array
3715 * @dai_link: DAI link
3717 * Dereference device nodes acquired by snd_soc_of_get_dai_link_cpus().
3719 void snd_soc_of_put_dai_link_cpus(struct snd_soc_dai_link *dai_link)
3721 struct snd_soc_dai_link_component *component;
3724 for_each_link_cpus(dai_link, index, component)
3725 __snd_soc_of_put_component(component);
3727 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_cpus);
3730 * snd_soc_of_get_dai_link_cpus - Parse a list of CPU DAIs in the devicetree
3732 * @of_node: Device node
3733 * @dai_link: DAI link
3735 * Is analogous to snd_soc_of_get_dai_link_codecs but parses a list of CPU DAIs
3738 * Returns 0 for success
3740 int snd_soc_of_get_dai_link_cpus(struct device *dev,
3741 struct device_node *of_node,
3742 struct snd_soc_dai_link *dai_link)
3744 struct snd_soc_dai_link_component *component;
3747 /* Count the number of CPUs */
3748 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3749 &dai_link->cpus, &dai_link->num_cpus);
3753 /* Parse the list */
3754 for_each_link_cpus(dai_link, index, component) {
3755 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3761 snd_soc_of_put_dai_link_cpus(dai_link);
3762 dai_link->cpus = NULL;
3763 dai_link->num_cpus = 0;
3766 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_cpus);
3768 static int __init snd_soc_init(void)
3772 snd_soc_debugfs_init();
3773 ret = snd_soc_util_init();
3777 ret = platform_driver_register(&soc_driver);
3783 snd_soc_util_exit();
3785 snd_soc_debugfs_exit();
3788 module_init(snd_soc_init);
3790 static void __exit snd_soc_exit(void)
3792 snd_soc_util_exit();
3793 snd_soc_debugfs_exit();
3795 platform_driver_unregister(&soc_driver);
3797 module_exit(snd_soc_exit);
3799 /* Module information */
3800 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3801 MODULE_DESCRIPTION("ALSA SoC Core");
3802 MODULE_LICENSE("GPL");
3803 MODULE_ALIAS("platform:soc-audio");