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 = asoc_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 --|
558 * asoc_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_flush_all_delayed_work(struct snd_soc_card *card)
581 struct snd_soc_pcm_runtime *rtd;
583 for_each_card_rtds(card, rtd)
584 flush_delayed_work(&rtd->delayed_work);
587 #ifdef CONFIG_PM_SLEEP
588 static void soc_playback_digital_mute(struct snd_soc_card *card, int mute)
590 struct snd_soc_pcm_runtime *rtd;
591 struct snd_soc_dai *dai;
592 int playback = SNDRV_PCM_STREAM_PLAYBACK;
595 for_each_card_rtds(card, rtd) {
597 if (rtd->dai_link->ignore_suspend)
600 for_each_rtd_dais(rtd, i, dai) {
601 if (snd_soc_dai_stream_active(dai, playback))
602 snd_soc_dai_digital_mute(dai, mute, playback);
607 static void soc_dapm_suspend_resume(struct snd_soc_card *card, int event)
609 struct snd_soc_pcm_runtime *rtd;
612 for_each_card_rtds(card, rtd) {
614 if (rtd->dai_link->ignore_suspend)
617 for_each_pcm_streams(stream)
618 snd_soc_dapm_stream_event(rtd, stream, event);
622 /* powers down audio subsystem for suspend */
623 int snd_soc_suspend(struct device *dev)
625 struct snd_soc_card *card = dev_get_drvdata(dev);
626 struct snd_soc_component *component;
627 struct snd_soc_pcm_runtime *rtd;
630 /* If the card is not initialized yet there is nothing to do */
631 if (!snd_soc_card_is_instantiated(card))
635 * Due to the resume being scheduled into a workqueue we could
636 * suspend before that's finished - wait for it to complete.
638 snd_power_wait(card->snd_card);
640 /* we're going to block userspace touching us until resume completes */
641 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
643 /* mute any active DACs */
644 soc_playback_digital_mute(card, 1);
646 /* suspend all pcms */
647 for_each_card_rtds(card, rtd) {
648 if (rtd->dai_link->ignore_suspend)
651 snd_pcm_suspend_all(rtd->pcm);
654 snd_soc_card_suspend_pre(card);
656 /* close any waiting streams */
657 snd_soc_flush_all_delayed_work(card);
659 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_SUSPEND);
661 /* Recheck all endpoints too, their state is affected by suspend */
662 dapm_mark_endpoints_dirty(card);
663 snd_soc_dapm_sync(&card->dapm);
665 /* suspend all COMPONENTs */
666 for_each_card_rtds(card, rtd) {
668 if (rtd->dai_link->ignore_suspend)
671 for_each_rtd_components(rtd, i, component) {
672 struct snd_soc_dapm_context *dapm =
673 snd_soc_component_get_dapm(component);
676 * ignore if component was already suspended
678 if (snd_soc_component_is_suspended(component))
682 * If there are paths active then the COMPONENT will be
683 * held with bias _ON and should not be suspended.
685 switch (snd_soc_dapm_get_bias_level(dapm)) {
686 case SND_SOC_BIAS_STANDBY:
688 * If the COMPONENT is capable of idle
689 * bias off then being in STANDBY
690 * means it's doing something,
691 * otherwise fall through.
693 if (dapm->idle_bias_off) {
694 dev_dbg(component->dev,
695 "ASoC: idle_bias_off CODEC on over suspend\n");
700 case SND_SOC_BIAS_OFF:
701 snd_soc_component_suspend(component);
702 if (component->regmap)
703 regcache_mark_dirty(component->regmap);
704 /* deactivate pins to sleep state */
705 pinctrl_pm_select_sleep_state(component->dev);
708 dev_dbg(component->dev,
709 "ASoC: COMPONENT is on over suspend\n");
715 snd_soc_card_suspend_post(card);
719 EXPORT_SYMBOL_GPL(snd_soc_suspend);
722 * deferred resume work, so resume can complete before we finished
723 * setting our codec back up, which can be very slow on I2C
725 static void soc_resume_deferred(struct work_struct *work)
727 struct snd_soc_card *card =
728 container_of(work, struct snd_soc_card,
729 deferred_resume_work);
730 struct snd_soc_component *component;
733 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
734 * so userspace apps are blocked from touching us
737 dev_dbg(card->dev, "ASoC: starting resume work\n");
739 /* Bring us up into D2 so that DAPM starts enabling things */
740 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
742 snd_soc_card_resume_pre(card);
744 for_each_card_components(card, component) {
745 if (snd_soc_component_is_suspended(component))
746 snd_soc_component_resume(component);
749 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_RESUME);
751 /* unmute any active DACs */
752 soc_playback_digital_mute(card, 0);
754 snd_soc_card_resume_post(card);
756 dev_dbg(card->dev, "ASoC: resume work completed\n");
758 /* Recheck all endpoints too, their state is affected by suspend */
759 dapm_mark_endpoints_dirty(card);
760 snd_soc_dapm_sync(&card->dapm);
762 /* userspace can access us now we are back as we were before */
763 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
766 /* powers up audio subsystem after a suspend */
767 int snd_soc_resume(struct device *dev)
769 struct snd_soc_card *card = dev_get_drvdata(dev);
770 struct snd_soc_component *component;
772 /* If the card is not initialized yet there is nothing to do */
773 if (!snd_soc_card_is_instantiated(card))
776 /* activate pins from sleep state */
777 for_each_card_components(card, component)
778 if (snd_soc_component_active(component))
779 pinctrl_pm_select_default_state(component->dev);
781 dev_dbg(dev, "ASoC: Scheduling resume work\n");
782 if (!schedule_work(&card->deferred_resume_work))
783 dev_err(dev, "ASoC: resume work item may be lost\n");
787 EXPORT_SYMBOL_GPL(snd_soc_resume);
789 static void soc_resume_init(struct snd_soc_card *card)
791 /* deferred resume work */
792 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
795 #define snd_soc_suspend NULL
796 #define snd_soc_resume NULL
797 static inline void soc_resume_init(struct snd_soc_card *card) { }
800 static struct device_node
801 *soc_component_to_node(struct snd_soc_component *component)
803 struct device_node *of_node;
805 of_node = component->dev->of_node;
806 if (!of_node && component->dev->parent)
807 of_node = component->dev->parent->of_node;
812 struct of_phandle_args *snd_soc_copy_dai_args(struct device *dev, struct of_phandle_args *args)
814 struct of_phandle_args *ret = devm_kzalloc(dev, sizeof(*ret), GFP_KERNEL);
823 EXPORT_SYMBOL_GPL(snd_soc_copy_dai_args);
825 static int snd_soc_is_matching_component(
826 const struct snd_soc_dai_link_component *dlc,
827 struct snd_soc_component *component)
829 struct device_node *component_of_node;
835 struct snd_soc_dai *dai;
837 for_each_component_dais(component, dai)
838 if (snd_soc_is_matching_dai(dlc, dai))
843 component_of_node = soc_component_to_node(component);
845 if (dlc->of_node && component_of_node != dlc->of_node)
847 if (dlc->name && strcmp(component->name, dlc->name))
853 static struct snd_soc_component *soc_find_component(
854 const struct snd_soc_dai_link_component *dlc)
856 struct snd_soc_component *component;
858 lockdep_assert_held(&client_mutex);
863 * It returns *1st* found component, but some driver
864 * has few components by same of_node/name
866 * CPU component and generic DMAEngine component
868 for_each_component(component)
869 if (snd_soc_is_matching_component(dlc, component))
876 * snd_soc_find_dai - Find a registered DAI
878 * @dlc: name of the DAI or the DAI driver and optional component info to match
880 * This function will search all registered components and their DAIs to
881 * find the DAI of the same name. The component's of_node and name
882 * should also match if being specified.
884 * Return: pointer of DAI, or NULL if not found.
886 struct snd_soc_dai *snd_soc_find_dai(
887 const struct snd_soc_dai_link_component *dlc)
889 struct snd_soc_component *component;
890 struct snd_soc_dai *dai;
892 lockdep_assert_held(&client_mutex);
894 /* Find CPU DAI from registered DAIs */
895 for_each_component(component)
896 if (snd_soc_is_matching_component(dlc, component))
897 for_each_component_dais(component, dai)
898 if (snd_soc_is_matching_dai(dlc, dai))
903 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
905 struct snd_soc_dai *snd_soc_find_dai_with_mutex(
906 const struct snd_soc_dai_link_component *dlc)
908 struct snd_soc_dai *dai;
910 mutex_lock(&client_mutex);
911 dai = snd_soc_find_dai(dlc);
912 mutex_unlock(&client_mutex);
916 EXPORT_SYMBOL_GPL(snd_soc_find_dai_with_mutex);
918 static int soc_dai_link_sanity_check(struct snd_soc_card *card,
919 struct snd_soc_dai_link *link)
922 struct snd_soc_dai_link_component *dlc;
925 for_each_link_codecs(link, i, dlc) {
927 * Codec must be specified by 1 of name or OF node,
928 * not both or neither.
930 if (snd_soc_dlc_component_is_invalid(dlc))
931 goto component_invalid;
933 if (snd_soc_dlc_component_is_empty(dlc))
934 goto component_empty;
936 /* Codec DAI name must be specified */
937 if (snd_soc_dlc_dai_is_empty(dlc))
941 * Defer card registration if codec component is not added to
944 if (!soc_find_component(dlc))
945 goto component_not_found;
949 for_each_link_platforms(link, i, dlc) {
951 * Platform may be specified by either name or OF node, but it
952 * can be left unspecified, then no components will be inserted
955 if (snd_soc_dlc_component_is_invalid(dlc))
956 goto component_invalid;
958 if (snd_soc_dlc_component_is_empty(dlc))
959 goto component_empty;
962 * Defer card registration if platform component is not added to
965 if (!soc_find_component(dlc))
966 goto component_not_found;
970 for_each_link_cpus(link, i, dlc) {
972 * CPU device may be specified by either name or OF node, but
973 * can be left unspecified, and will be matched based on DAI
976 if (snd_soc_dlc_component_is_invalid(dlc))
977 goto component_invalid;
980 if (snd_soc_dlc_component_is_empty(dlc)) {
982 * At least one of CPU DAI name or CPU device name/node must be specified
984 if (snd_soc_dlc_dai_is_empty(dlc))
985 goto component_dai_empty;
988 * Defer card registration if Component is not added
990 if (!soc_find_component(dlc))
991 goto component_not_found;
998 dev_err(card->dev, "ASoC: Both Component name/of_node are set for %s\n", link->name);
1002 dev_err(card->dev, "ASoC: Neither Component name/of_node are set for %s\n", link->name);
1005 component_not_found:
1006 dev_dbg(card->dev, "ASoC: Component %s not found for link %s\n", dlc->name, link->name);
1007 return -EPROBE_DEFER;
1010 dev_err(card->dev, "ASoC: DAI name is not set for %s\n", link->name);
1013 component_dai_empty:
1014 dev_err(card->dev, "ASoC: Neither DAI/Component name/of_node are set for %s\n", link->name);
1019 * snd_soc_remove_pcm_runtime - Remove a pcm_runtime from card
1020 * @card: The ASoC card to which the pcm_runtime has
1021 * @rtd: The pcm_runtime to remove
1023 * This function removes a pcm_runtime from the ASoC card.
1025 void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
1026 struct snd_soc_pcm_runtime *rtd)
1028 lockdep_assert_held(&client_mutex);
1031 * Notify the machine driver for extra destruction
1033 snd_soc_card_remove_dai_link(card, rtd->dai_link);
1035 soc_free_pcm_runtime(rtd);
1037 EXPORT_SYMBOL_GPL(snd_soc_remove_pcm_runtime);
1040 * snd_soc_add_pcm_runtime - Add a pcm_runtime dynamically via dai_link
1041 * @card: The ASoC card to which the pcm_runtime is added
1042 * @dai_link: The DAI link to find pcm_runtime
1044 * This function adds a pcm_runtime ASoC card by using dai_link.
1046 * Note: Topology can use this API to add pcm_runtime when probing the
1047 * topology component. And machine drivers can still define static
1048 * DAI links in dai_link array.
1050 static int snd_soc_add_pcm_runtime(struct snd_soc_card *card,
1051 struct snd_soc_dai_link *dai_link)
1053 struct snd_soc_pcm_runtime *rtd;
1054 struct snd_soc_dai_link_component *codec, *platform, *cpu;
1055 struct snd_soc_component *component;
1058 lockdep_assert_held(&client_mutex);
1061 * Notify the machine driver for extra initialization
1063 ret = snd_soc_card_add_dai_link(card, dai_link);
1067 if (dai_link->ignore)
1070 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1072 ret = soc_dai_link_sanity_check(card, dai_link);
1076 rtd = soc_new_pcm_runtime(card, dai_link);
1080 for_each_link_cpus(dai_link, i, cpu) {
1081 asoc_rtd_to_cpu(rtd, i) = snd_soc_find_dai(cpu);
1082 if (!asoc_rtd_to_cpu(rtd, i)) {
1083 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1087 snd_soc_rtd_add_component(rtd, asoc_rtd_to_cpu(rtd, i)->component);
1090 /* Find CODEC from registered CODECs */
1091 for_each_link_codecs(dai_link, i, codec) {
1092 asoc_rtd_to_codec(rtd, i) = snd_soc_find_dai(codec);
1093 if (!asoc_rtd_to_codec(rtd, i)) {
1094 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
1099 snd_soc_rtd_add_component(rtd, asoc_rtd_to_codec(rtd, i)->component);
1102 /* Find PLATFORM from registered PLATFORMs */
1103 for_each_link_platforms(dai_link, i, platform) {
1104 for_each_component(component) {
1105 if (!snd_soc_is_matching_component(platform, component))
1108 snd_soc_rtd_add_component(rtd, component);
1115 snd_soc_remove_pcm_runtime(card, rtd);
1116 return -EPROBE_DEFER;
1119 int snd_soc_add_pcm_runtimes(struct snd_soc_card *card,
1120 struct snd_soc_dai_link *dai_link,
1123 for (int i = 0; i < num_dai_link; i++) {
1124 int ret = snd_soc_add_pcm_runtime(card, dai_link + i);
1132 EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtimes);
1134 static void snd_soc_runtime_get_dai_fmt(struct snd_soc_pcm_runtime *rtd)
1136 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1137 struct snd_soc_dai *dai, *not_used;
1138 u64 pos, possible_fmt;
1139 unsigned int mask = 0, dai_fmt = 0;
1140 int i, j, priority, pri, until;
1143 * Get selectable format from each DAIs.
1145 ****************************
1147 * Using .auto_selectable_formats is not mandatory,
1148 * we can select format manually from Sound Card.
1149 * When use it, driver should list well tested format only.
1150 ****************************
1153 * auto_selectable_formats (= SND_SOC_POSSIBLE_xxx)
1155 * DAI0_: { 0x000F, 0x00F0, 0x0F00 };
1156 * DAI1 : { 0xF000, 0x0F00 };
1159 * "until" will be 3 in this case (MAX array size from DAI0 and DAI1)
1160 * Here is dev_dbg() message and comments
1163 * DAI0: (pri, fmt) = (1, 000000000000000F) // 1st check (A) DAI1 is not selected
1164 * DAI1: (pri, fmt) = (0, 0000000000000000) // Necessary Waste
1165 * DAI0: (pri, fmt) = (1, 000000000000000F) // 2nd check (A)
1166 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1168 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 3rd check (A) + (B)
1169 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1170 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 4th check (A) + (B)
1171 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1173 * DAI0: (pri, fmt) = (3, 0000000000000FFF) // 5th check (A) + (B) + (C)
1174 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1175 * found auto selected format: 0000000000000F00
1177 until = snd_soc_dai_get_fmt_max_priority(rtd);
1178 for (priority = 1; priority <= until; priority++) {
1179 for_each_rtd_dais(rtd, j, not_used) {
1181 possible_fmt = ULLONG_MAX;
1182 for_each_rtd_dais(rtd, i, dai) {
1185 pri = (j >= i) ? priority : priority - 1;
1186 fmt = snd_soc_dai_get_fmt(dai, pri);
1187 possible_fmt &= fmt;
1197 * convert POSSIBLE_DAIFMT to DAIFMT
1199 * Some basic/default settings on each is defined as 0.
1201 * SND_SOC_DAIFMT_NB_NF
1202 * SND_SOC_DAIFMT_GATED
1204 * SND_SOC_DAIFMT_xxx_MASK can't notice it if Sound Card specify
1205 * these value, and will be overwrite to auto selected value.
1207 * To avoid such issue, loop from 63 to 0 here.
1208 * Small number of SND_SOC_POSSIBLE_xxx will be Hi priority.
1209 * Basic/Default settings of each part and aboves are defined
1210 * as Hi priority (= small number) of SND_SOC_POSSIBLE_xxx.
1212 for (i = 63; i >= 0; i--) {
1214 switch (possible_fmt & pos) {
1218 case SND_SOC_POSSIBLE_DAIFMT_I2S:
1219 case SND_SOC_POSSIBLE_DAIFMT_RIGHT_J:
1220 case SND_SOC_POSSIBLE_DAIFMT_LEFT_J:
1221 case SND_SOC_POSSIBLE_DAIFMT_DSP_A:
1222 case SND_SOC_POSSIBLE_DAIFMT_DSP_B:
1223 case SND_SOC_POSSIBLE_DAIFMT_AC97:
1224 case SND_SOC_POSSIBLE_DAIFMT_PDM:
1225 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_FORMAT_MASK) | i;
1230 case SND_SOC_POSSIBLE_DAIFMT_CONT:
1231 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_CONT;
1233 case SND_SOC_POSSIBLE_DAIFMT_GATED:
1234 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_GATED;
1239 case SND_SOC_POSSIBLE_DAIFMT_NB_NF:
1240 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_NF;
1242 case SND_SOC_POSSIBLE_DAIFMT_NB_IF:
1243 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_IF;
1245 case SND_SOC_POSSIBLE_DAIFMT_IB_NF:
1246 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_NF;
1248 case SND_SOC_POSSIBLE_DAIFMT_IB_IF:
1249 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_IF;
1252 * for clock provider / consumer
1254 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFP:
1255 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFP;
1257 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFP:
1258 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFP;
1260 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFC:
1261 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFC;
1263 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFC:
1264 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFC;
1270 * Some driver might have very complex limitation.
1271 * In such case, user want to auto-select non-limitation part,
1272 * and want to manually specify complex part.
1274 * Or for example, if both CPU and Codec can be clock provider,
1275 * but because of its quality, user want to specify it manually.
1277 * Use manually specified settings if sound card did.
1279 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK))
1280 mask |= SND_SOC_DAIFMT_FORMAT_MASK;
1281 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_MASK))
1282 mask |= SND_SOC_DAIFMT_CLOCK_MASK;
1283 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_INV_MASK))
1284 mask |= SND_SOC_DAIFMT_INV_MASK;
1285 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK))
1286 mask |= SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
1288 dai_link->dai_fmt |= (dai_fmt & mask);
1292 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1293 * @rtd: The runtime for which the DAI link format should be changed
1294 * @dai_fmt: The new DAI link format
1296 * This function updates the DAI link format for all DAIs connected to the DAI
1297 * link for the specified runtime.
1299 * Note: For setups with a static format set the dai_fmt field in the
1300 * corresponding snd_dai_link struct instead of using this function.
1302 * Returns 0 on success, otherwise a negative error code.
1304 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1305 unsigned int dai_fmt)
1307 struct snd_soc_dai *cpu_dai;
1308 struct snd_soc_dai *codec_dai;
1315 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1316 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1317 if (ret != 0 && ret != -ENOTSUPP)
1321 /* Flip the polarity for the "CPU" end of link */
1322 dai_fmt = snd_soc_daifmt_clock_provider_flipped(dai_fmt);
1324 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1325 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1326 if (ret != 0 && ret != -ENOTSUPP)
1332 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1334 static int soc_init_pcm_runtime(struct snd_soc_card *card,
1335 struct snd_soc_pcm_runtime *rtd)
1337 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1338 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
1339 struct snd_soc_component *component;
1342 /* do machine specific initialization */
1343 ret = snd_soc_link_init(rtd);
1347 snd_soc_runtime_get_dai_fmt(rtd);
1348 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1352 /* add DPCM sysfs entries */
1353 soc_dpcm_debugfs_add(rtd);
1358 * most drivers will register their PCMs using DAI link ordering but
1359 * topology based drivers can use the DAI link id field to set PCM
1360 * device number and then use rtd + a base offset of the BEs.
1362 for_each_rtd_components(rtd, i, component) {
1363 if (!component->driver->use_dai_pcm_id)
1366 if (rtd->dai_link->no_pcm)
1367 num += component->driver->be_pcm_base;
1369 num = rtd->dai_link->id;
1372 /* create compress_device if possible */
1373 ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1374 if (ret != -ENOTSUPP)
1377 /* create the pcm */
1378 ret = soc_new_pcm(rtd, num);
1380 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1381 dai_link->stream_name, ret);
1385 return snd_soc_pcm_dai_new(rtd);
1388 static void soc_set_name_prefix(struct snd_soc_card *card,
1389 struct snd_soc_component *component)
1391 struct device_node *of_node = soc_component_to_node(component);
1395 for (i = 0; i < card->num_configs; i++) {
1396 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1398 if (snd_soc_is_matching_component(&map->dlc, component) &&
1400 component->name_prefix = map->name_prefix;
1406 * If there is no configuration table or no match in the table,
1407 * check if a prefix is provided in the node
1409 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1413 component->name_prefix = str;
1416 static void soc_remove_component(struct snd_soc_component *component,
1420 if (!component->card)
1424 snd_soc_component_remove(component);
1426 list_del_init(&component->card_list);
1427 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1428 soc_cleanup_component_debugfs(component);
1429 component->card = NULL;
1430 snd_soc_component_module_put_when_remove(component);
1433 static int soc_probe_component(struct snd_soc_card *card,
1434 struct snd_soc_component *component)
1436 struct snd_soc_dapm_context *dapm =
1437 snd_soc_component_get_dapm(component);
1438 struct snd_soc_dai *dai;
1442 if (snd_soc_component_is_dummy(component))
1445 if (component->card) {
1446 if (component->card != card) {
1447 dev_err(component->dev,
1448 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1449 card->name, component->card->name);
1455 ret = snd_soc_component_module_get_when_probe(component);
1459 component->card = card;
1460 soc_set_name_prefix(card, component);
1462 soc_init_component_debugfs(component);
1464 snd_soc_dapm_init(dapm, card, component);
1466 ret = snd_soc_dapm_new_controls(dapm,
1467 component->driver->dapm_widgets,
1468 component->driver->num_dapm_widgets);
1471 dev_err(component->dev,
1472 "Failed to create new controls %d\n", ret);
1476 for_each_component_dais(component, dai) {
1477 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1479 dev_err(component->dev,
1480 "Failed to create DAI widgets %d\n", ret);
1485 ret = snd_soc_component_probe(component);
1489 WARN(dapm->idle_bias_off &&
1490 dapm->bias_level != SND_SOC_BIAS_OFF,
1491 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1496 * machine specific init
1498 * snd_soc_component_set_aux()
1500 ret = snd_soc_component_init(component);
1504 ret = snd_soc_add_component_controls(component,
1505 component->driver->controls,
1506 component->driver->num_controls);
1510 ret = snd_soc_dapm_add_routes(dapm,
1511 component->driver->dapm_routes,
1512 component->driver->num_dapm_routes);
1514 if (card->disable_route_checks) {
1516 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1520 "%s: snd_soc_dapm_add_routes failed: %d\n",
1526 /* see for_each_card_components */
1527 list_add(&component->card_list, &card->component_dev_list);
1531 soc_remove_component(component, probed);
1536 static void soc_remove_link_dais(struct snd_soc_card *card)
1538 struct snd_soc_pcm_runtime *rtd;
1541 for_each_comp_order(order) {
1542 for_each_card_rtds(card, rtd) {
1543 /* remove all rtd connected DAIs in good order */
1544 snd_soc_pcm_dai_remove(rtd, order);
1549 static int soc_probe_link_dais(struct snd_soc_card *card)
1551 struct snd_soc_pcm_runtime *rtd;
1554 for_each_comp_order(order) {
1555 for_each_card_rtds(card, rtd) {
1556 /* probe all rtd connected DAIs in good order */
1557 ret = snd_soc_pcm_dai_probe(rtd, order);
1566 static void soc_remove_link_components(struct snd_soc_card *card)
1568 struct snd_soc_component *component;
1569 struct snd_soc_pcm_runtime *rtd;
1572 for_each_comp_order(order) {
1573 for_each_card_rtds(card, rtd) {
1574 for_each_rtd_components(rtd, i, component) {
1575 if (component->driver->remove_order != order)
1578 soc_remove_component(component, 1);
1584 static int soc_probe_link_components(struct snd_soc_card *card)
1586 struct snd_soc_component *component;
1587 struct snd_soc_pcm_runtime *rtd;
1590 for_each_comp_order(order) {
1591 for_each_card_rtds(card, rtd) {
1592 for_each_rtd_components(rtd, i, component) {
1593 if (component->driver->probe_order != order)
1596 ret = soc_probe_component(card, component);
1606 static void soc_unbind_aux_dev(struct snd_soc_card *card)
1608 struct snd_soc_component *component, *_component;
1610 for_each_card_auxs_safe(card, component, _component) {
1611 /* for snd_soc_component_init() */
1612 snd_soc_component_set_aux(component, NULL);
1613 list_del(&component->card_aux_list);
1617 static int soc_bind_aux_dev(struct snd_soc_card *card)
1619 struct snd_soc_component *component;
1620 struct snd_soc_aux_dev *aux;
1623 for_each_card_pre_auxs(card, i, aux) {
1624 /* codecs, usually analog devices */
1625 component = soc_find_component(&aux->dlc);
1627 return -EPROBE_DEFER;
1629 /* for snd_soc_component_init() */
1630 snd_soc_component_set_aux(component, aux);
1631 /* see for_each_card_auxs */
1632 list_add(&component->card_aux_list, &card->aux_comp_list);
1637 static int soc_probe_aux_devices(struct snd_soc_card *card)
1639 struct snd_soc_component *component;
1643 for_each_comp_order(order) {
1644 for_each_card_auxs(card, component) {
1645 if (component->driver->probe_order != order)
1648 ret = soc_probe_component(card, component);
1657 static void soc_remove_aux_devices(struct snd_soc_card *card)
1659 struct snd_soc_component *comp, *_comp;
1662 for_each_comp_order(order) {
1663 for_each_card_auxs_safe(card, comp, _comp) {
1664 if (comp->driver->remove_order == order)
1665 soc_remove_component(comp, 1);
1672 * If a DMI filed contain strings in this blacklist (e.g.
1673 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
1674 * as invalid and dropped when setting the card long name from DMI info.
1676 static const char * const dmi_blacklist[] = {
1677 "To be filled by OEM",
1680 "Board Manufacturer",
1681 "Board Vendor Name",
1682 "Board Product Name",
1683 NULL, /* terminator */
1687 * Trim special characters, and replace '-' with '_' since '-' is used to
1688 * separate different DMI fields in the card long name. Only number and
1689 * alphabet characters and a few separator characters are kept.
1691 static void cleanup_dmi_name(char *name)
1695 for (i = 0; name[i]; i++) {
1696 if (isalnum(name[i]) || (name[i] == '.')
1697 || (name[i] == '_'))
1698 name[j++] = name[i];
1699 else if (name[i] == '-')
1707 * Check if a DMI field is valid, i.e. not containing any string
1708 * in the black list.
1710 static int is_dmi_valid(const char *field)
1714 while (dmi_blacklist[i]) {
1715 if (strstr(field, dmi_blacklist[i]))
1724 * Append a string to card->dmi_longname with character cleanups.
1726 static void append_dmi_string(struct snd_soc_card *card, const char *str)
1728 char *dst = card->dmi_longname;
1729 size_t dst_len = sizeof(card->dmi_longname);
1733 snprintf(dst + len, dst_len - len, "-%s", str);
1735 len++; /* skip the separator "-" */
1737 cleanup_dmi_name(dst + len);
1741 * snd_soc_set_dmi_name() - Register DMI names to card
1742 * @card: The card to register DMI names
1743 * @flavour: The flavour "differentiator" for the card amongst its peers.
1745 * An Intel machine driver may be used by many different devices but are
1746 * difficult for userspace to differentiate, since machine drivers ususally
1747 * use their own name as the card short name and leave the card long name
1748 * blank. To differentiate such devices and fix bugs due to lack of
1749 * device-specific configurations, this function allows DMI info to be used
1750 * as the sound card long name, in the format of
1751 * "vendor-product-version-board"
1752 * (Character '-' is used to separate different DMI fields here).
1753 * This will help the user space to load the device-specific Use Case Manager
1754 * (UCM) configurations for the card.
1756 * Possible card long names may be:
1757 * DellInc.-XPS139343-01-0310JH
1758 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1759 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1761 * This function also supports flavoring the card longname to provide
1762 * the extra differentiation, like "vendor-product-version-board-flavor".
1764 * We only keep number and alphabet characters and a few separator characters
1765 * in the card long name since UCM in the user space uses the card long names
1766 * as card configuration directory names and AudoConf cannot support special
1767 * charactors like SPACE.
1769 * Returns 0 on success, otherwise a negative error code.
1771 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1773 const char *vendor, *product, *board;
1775 if (card->long_name)
1776 return 0; /* long name already set by driver or from DMI */
1781 /* make up dmi long name as: vendor-product-version-board */
1782 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1783 if (!vendor || !is_dmi_valid(vendor)) {
1784 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1788 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1789 cleanup_dmi_name(card->dmi_longname);
1791 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1792 if (product && is_dmi_valid(product)) {
1793 const char *product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1795 append_dmi_string(card, product);
1798 * some vendors like Lenovo may only put a self-explanatory
1799 * name in the product version field
1801 if (product_version && is_dmi_valid(product_version))
1802 append_dmi_string(card, product_version);
1805 board = dmi_get_system_info(DMI_BOARD_NAME);
1806 if (board && is_dmi_valid(board)) {
1807 if (!product || strcasecmp(board, product))
1808 append_dmi_string(card, board);
1809 } else if (!product) {
1810 /* fall back to using legacy name */
1811 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1815 /* Add flavour to dmi long name */
1817 append_dmi_string(card, flavour);
1819 /* set the card long name */
1820 card->long_name = card->dmi_longname;
1824 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1825 #endif /* CONFIG_DMI */
1827 static void soc_check_tplg_fes(struct snd_soc_card *card)
1829 struct snd_soc_component *component;
1830 const struct snd_soc_component_driver *comp_drv;
1831 struct snd_soc_dai_link *dai_link;
1834 for_each_component(component) {
1836 /* does this component override BEs ? */
1837 if (!component->driver->ignore_machine)
1840 /* for this machine ? */
1841 if (!strcmp(component->driver->ignore_machine,
1842 card->dev->driver->name))
1844 if (strcmp(component->driver->ignore_machine,
1845 dev_name(card->dev)))
1848 /* machine matches, so override the rtd data */
1849 for_each_card_prelinks(card, i, dai_link) {
1851 /* ignore this FE */
1852 if (dai_link->dynamic) {
1853 dai_link->ignore = true;
1857 dev_dbg(card->dev, "info: override BE DAI link %s\n",
1858 card->dai_link[i].name);
1860 /* override platform component */
1861 if (!dai_link->platforms) {
1862 dev_err(card->dev, "init platform error");
1866 if (component->dev->of_node)
1867 dai_link->platforms->of_node = component->dev->of_node;
1869 dai_link->platforms->name = component->name;
1871 /* convert non BE into BE */
1872 if (!dai_link->no_pcm) {
1873 dai_link->no_pcm = 1;
1875 if (dai_link->dpcm_playback)
1877 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_playback=1\n",
1879 if (dai_link->dpcm_capture)
1881 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_capture=1\n",
1884 /* convert normal link into DPCM one */
1885 if (!(dai_link->dpcm_playback ||
1886 dai_link->dpcm_capture)) {
1887 dai_link->dpcm_playback = !dai_link->capture_only;
1888 dai_link->dpcm_capture = !dai_link->playback_only;
1893 * override any BE fixups
1895 * snd_soc_link_be_hw_params_fixup()
1897 dai_link->be_hw_params_fixup =
1898 component->driver->be_hw_params_fixup;
1901 * most BE links don't set stream name, so set it to
1902 * dai link name if it's NULL to help bind widgets.
1904 if (!dai_link->stream_name)
1905 dai_link->stream_name = dai_link->name;
1908 /* Inform userspace we are using alternate topology */
1909 if (component->driver->topology_name_prefix) {
1911 /* topology shortname created? */
1912 if (!card->topology_shortname_created) {
1913 comp_drv = component->driver;
1915 snprintf(card->topology_shortname, 32, "%s-%s",
1916 comp_drv->topology_name_prefix,
1918 card->topology_shortname_created = true;
1921 /* use topology shortname */
1922 card->name = card->topology_shortname;
1927 #define soc_setup_card_name(card, name, name1, name2) \
1928 __soc_setup_card_name(card, name, sizeof(name), name1, name2)
1929 static void __soc_setup_card_name(struct snd_soc_card *card,
1930 char *name, int len,
1931 const char *name1, const char *name2)
1933 const char *src = name1 ? name1 : name2;
1936 snprintf(name, len, "%s", src);
1938 if (name != card->snd_card->driver)
1942 * Name normalization (driver field)
1944 * The driver name is somewhat special, as it's used as a key for
1945 * searches in the user-space.
1948 * "abcd??efg" -> "abcd__efg"
1950 for (i = 0; i < len; i++) {
1957 if (!isalnum(name[i]))
1964 * The driver field should contain a valid string from the user view.
1965 * The wrapping usually does not work so well here. Set a smaller string
1966 * in the specific ASoC driver.
1968 if (strlen(src) > len - 1)
1969 dev_err(card->dev, "ASoC: driver name too long '%s' -> '%s'\n", src, name);
1972 static void soc_cleanup_card_resources(struct snd_soc_card *card)
1974 struct snd_soc_pcm_runtime *rtd, *n;
1977 snd_card_disconnect_sync(card->snd_card);
1979 snd_soc_dapm_shutdown(card);
1981 /* release machine specific resources */
1982 for_each_card_rtds(card, rtd)
1983 snd_soc_link_exit(rtd);
1984 /* remove and free each DAI */
1985 soc_remove_link_dais(card);
1986 soc_remove_link_components(card);
1988 for_each_card_rtds_safe(card, rtd, n)
1989 snd_soc_remove_pcm_runtime(card, rtd);
1991 /* remove auxiliary devices */
1992 soc_remove_aux_devices(card);
1993 soc_unbind_aux_dev(card);
1995 snd_soc_dapm_free(&card->dapm);
1996 soc_cleanup_card_debugfs(card);
1998 /* remove the card */
1999 snd_soc_card_remove(card);
2001 if (card->snd_card) {
2002 snd_card_free(card->snd_card);
2003 card->snd_card = NULL;
2007 static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
2009 if (snd_soc_card_is_instantiated(card)) {
2010 card->instantiated = false;
2011 snd_soc_flush_all_delayed_work(card);
2013 soc_cleanup_card_resources(card);
2015 list_add(&card->list, &unbind_card_list);
2018 list_del(&card->list);
2022 static int snd_soc_bind_card(struct snd_soc_card *card)
2024 struct snd_soc_pcm_runtime *rtd;
2025 struct snd_soc_component *component;
2028 mutex_lock(&client_mutex);
2029 snd_soc_card_mutex_lock_root(card);
2031 snd_soc_dapm_init(&card->dapm, card, NULL);
2033 /* check whether any platform is ignore machine FE and using topology */
2034 soc_check_tplg_fes(card);
2036 /* bind aux_devs too */
2037 ret = soc_bind_aux_dev(card);
2041 /* add predefined DAI links to the list */
2043 ret = snd_soc_add_pcm_runtimes(card, card->dai_link, card->num_links);
2047 /* card bind complete so register a sound card */
2048 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2049 card->owner, 0, &card->snd_card);
2052 "ASoC: can't create sound card for card %s: %d\n",
2057 soc_init_card_debugfs(card);
2059 soc_resume_init(card);
2061 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2062 card->num_dapm_widgets);
2066 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2067 card->num_of_dapm_widgets);
2071 /* initialise the sound card only once */
2072 ret = snd_soc_card_probe(card);
2076 /* probe all components used by DAI links on this card */
2077 ret = soc_probe_link_components(card);
2079 if (ret != -EPROBE_DEFER) {
2081 "ASoC: failed to instantiate card %d\n", ret);
2086 /* probe auxiliary components */
2087 ret = soc_probe_aux_devices(card);
2090 "ASoC: failed to probe aux component %d\n", ret);
2094 /* probe all DAI links on this card */
2095 ret = soc_probe_link_dais(card);
2098 "ASoC: failed to instantiate card %d\n", ret);
2102 for_each_card_rtds(card, rtd) {
2103 ret = soc_init_pcm_runtime(card, rtd);
2108 snd_soc_dapm_link_dai_widgets(card);
2109 snd_soc_dapm_connect_dai_link_widgets(card);
2111 ret = snd_soc_add_card_controls(card, card->controls,
2112 card->num_controls);
2116 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2117 card->num_dapm_routes);
2119 if (card->disable_route_checks) {
2121 "%s: disable_route_checks set, ignoring errors on add_routes\n",
2125 "%s: snd_soc_dapm_add_routes failed: %d\n",
2131 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2132 card->num_of_dapm_routes);
2136 /* try to set some sane longname if DMI is available */
2137 snd_soc_set_dmi_name(card, NULL);
2139 soc_setup_card_name(card, card->snd_card->shortname,
2141 soc_setup_card_name(card, card->snd_card->longname,
2142 card->long_name, card->name);
2143 soc_setup_card_name(card, card->snd_card->driver,
2144 card->driver_name, card->name);
2146 if (card->components) {
2147 /* the current implementation of snd_component_add() accepts */
2148 /* multiple components in the string separated by space, */
2149 /* but the string collision (identical string) check might */
2150 /* not work correctly */
2151 ret = snd_component_add(card->snd_card, card->components);
2153 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
2159 ret = snd_soc_card_late_probe(card);
2163 snd_soc_dapm_new_widgets(card);
2164 snd_soc_card_fixup_controls(card);
2166 ret = snd_card_register(card->snd_card);
2168 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2173 card->instantiated = 1;
2174 dapm_mark_endpoints_dirty(card);
2175 snd_soc_dapm_sync(&card->dapm);
2177 /* deactivate pins to sleep state */
2178 for_each_card_components(card, component)
2179 if (!snd_soc_component_active(component))
2180 pinctrl_pm_select_sleep_state(component->dev);
2184 soc_cleanup_card_resources(card);
2186 snd_soc_card_mutex_unlock(card);
2187 mutex_unlock(&client_mutex);
2192 /* probes a new socdev */
2193 static int soc_probe(struct platform_device *pdev)
2195 struct snd_soc_card *card = platform_get_drvdata(pdev);
2198 * no card, so machine driver should be registering card
2199 * we should not be here in that case so ret error
2204 dev_warn(&pdev->dev,
2205 "ASoC: machine %s should use snd_soc_register_card()\n",
2208 /* Bodge while we unpick instantiation */
2209 card->dev = &pdev->dev;
2211 return devm_snd_soc_register_card(&pdev->dev, card);
2214 int snd_soc_poweroff(struct device *dev)
2216 struct snd_soc_card *card = dev_get_drvdata(dev);
2217 struct snd_soc_component *component;
2219 if (!snd_soc_card_is_instantiated(card))
2223 * Flush out pmdown_time work - we actually do want to run it
2224 * now, we're shutting down so no imminent restart.
2226 snd_soc_flush_all_delayed_work(card);
2228 snd_soc_dapm_shutdown(card);
2230 /* deactivate pins to sleep state */
2231 for_each_card_components(card, component)
2232 pinctrl_pm_select_sleep_state(component->dev);
2236 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2238 const struct dev_pm_ops snd_soc_pm_ops = {
2239 .suspend = snd_soc_suspend,
2240 .resume = snd_soc_resume,
2241 .freeze = snd_soc_suspend,
2242 .thaw = snd_soc_resume,
2243 .poweroff = snd_soc_poweroff,
2244 .restore = snd_soc_resume,
2246 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2248 /* ASoC platform driver */
2249 static struct platform_driver soc_driver = {
2251 .name = "soc-audio",
2252 .pm = &snd_soc_pm_ops,
2258 * snd_soc_cnew - create new control
2259 * @_template: control template
2260 * @data: control private data
2261 * @long_name: control long name
2262 * @prefix: control name prefix
2264 * Create a new mixer control from a template control.
2266 * Returns 0 for success, else error.
2268 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2269 void *data, const char *long_name,
2272 struct snd_kcontrol_new template;
2273 struct snd_kcontrol *kcontrol;
2276 memcpy(&template, _template, sizeof(template));
2280 long_name = template.name;
2283 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2287 template.name = name;
2289 template.name = long_name;
2292 kcontrol = snd_ctl_new1(&template, data);
2298 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2300 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2301 const struct snd_kcontrol_new *controls, int num_controls,
2302 const char *prefix, void *data)
2306 for (i = 0; i < num_controls; i++) {
2307 const struct snd_kcontrol_new *control = &controls[i];
2308 int err = snd_ctl_add(card, snd_soc_cnew(control, data,
2309 control->name, prefix));
2311 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2312 control->name, err);
2321 * snd_soc_add_component_controls - Add an array of controls to a component.
2323 * @component: Component to add controls to
2324 * @controls: Array of controls to add
2325 * @num_controls: Number of elements in the array
2327 * Return: 0 for success, else error.
2329 int snd_soc_add_component_controls(struct snd_soc_component *component,
2330 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2332 struct snd_card *card = component->card->snd_card;
2334 return snd_soc_add_controls(card, component->dev, controls,
2335 num_controls, component->name_prefix, component);
2337 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2340 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2341 * Convenience function to add a list of controls.
2343 * @soc_card: SoC card to add controls to
2344 * @controls: array of controls to add
2345 * @num_controls: number of elements in the array
2347 * Return 0 for success, else error.
2349 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2350 const struct snd_kcontrol_new *controls, int num_controls)
2352 struct snd_card *card = soc_card->snd_card;
2354 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2357 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2360 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2361 * Convienience function to add a list of controls.
2363 * @dai: DAI to add controls to
2364 * @controls: array of controls to add
2365 * @num_controls: number of elements in the array
2367 * Return 0 for success, else error.
2369 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2370 const struct snd_kcontrol_new *controls, int num_controls)
2372 struct snd_card *card = dai->component->card->snd_card;
2374 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2377 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2380 * snd_soc_register_card - Register a card with the ASoC core
2382 * @card: Card to register
2385 int snd_soc_register_card(struct snd_soc_card *card)
2387 if (!card->name || !card->dev)
2390 dev_set_drvdata(card->dev, card);
2392 INIT_LIST_HEAD(&card->widgets);
2393 INIT_LIST_HEAD(&card->paths);
2394 INIT_LIST_HEAD(&card->dapm_list);
2395 INIT_LIST_HEAD(&card->aux_comp_list);
2396 INIT_LIST_HEAD(&card->component_dev_list);
2397 INIT_LIST_HEAD(&card->list);
2398 INIT_LIST_HEAD(&card->rtd_list);
2399 INIT_LIST_HEAD(&card->dapm_dirty);
2400 INIT_LIST_HEAD(&card->dobj_list);
2402 card->instantiated = 0;
2403 mutex_init(&card->mutex);
2404 mutex_init(&card->dapm_mutex);
2405 mutex_init(&card->pcm_mutex);
2407 return snd_soc_bind_card(card);
2409 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2412 * snd_soc_unregister_card - Unregister a card with the ASoC core
2414 * @card: Card to unregister
2417 void snd_soc_unregister_card(struct snd_soc_card *card)
2419 mutex_lock(&client_mutex);
2420 snd_soc_unbind_card(card, true);
2421 mutex_unlock(&client_mutex);
2422 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2424 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2427 * Simplify DAI link configuration by removing ".-1" from device names
2428 * and sanitizing names.
2430 static char *fmt_single_name(struct device *dev, int *id)
2432 const char *devname = dev_name(dev);
2434 unsigned int id1, id2;
2436 if (devname == NULL)
2439 name = devm_kstrdup(dev, devname, GFP_KERNEL);
2443 /* are we a "%s.%d" name (platform and SPI components) */
2444 found = strstr(name, dev->driver->name);
2447 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2449 /* discard ID from name if ID == -1 */
2451 found[strlen(dev->driver->name)] = '\0';
2454 /* I2C component devices are named "bus-addr" */
2455 } else if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2457 /* create unique ID number from I2C addr and bus */
2458 *id = ((id1 & 0xffff) << 16) + id2;
2460 devm_kfree(dev, name);
2462 /* sanitize component name for DAI link creation */
2463 name = devm_kasprintf(dev, GFP_KERNEL, "%s.%s", dev->driver->name, devname);
2472 * Simplify DAI link naming for single devices with multiple DAIs by removing
2473 * any ".-1" and using the DAI name (instead of device name).
2475 static inline char *fmt_multiple_name(struct device *dev,
2476 struct snd_soc_dai_driver *dai_drv)
2478 if (dai_drv->name == NULL) {
2480 "ASoC: error - multiple DAI %s registered with no name\n",
2485 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2488 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2490 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2491 list_del(&dai->list);
2493 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2496 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2498 * @component: The component the DAIs are registered for
2499 * @dai_drv: DAI driver to use for the DAI
2500 * @legacy_dai_naming: if %true, use legacy single-name format;
2501 * if %false, use multiple-name format;
2503 * Topology can use this API to register DAIs when probing a component.
2504 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2505 * will be freed in the component cleanup.
2507 struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2508 struct snd_soc_dai_driver *dai_drv,
2509 bool legacy_dai_naming)
2511 struct device *dev = component->dev;
2512 struct snd_soc_dai *dai;
2514 lockdep_assert_held(&client_mutex);
2516 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2521 * Back in the old days when we still had component-less DAIs,
2522 * instead of having a static name, component-less DAIs would
2523 * inherit the name of the parent device so it is possible to
2524 * register multiple instances of the DAI. We still need to keep
2525 * the same naming style even though those DAIs are not
2526 * component-less anymore.
2528 if (legacy_dai_naming &&
2529 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2530 dai->name = fmt_single_name(dev, &dai->id);
2532 dai->name = fmt_multiple_name(dev, dai_drv);
2534 dai->id = dai_drv->id;
2536 dai->id = component->num_dai;
2541 dai->component = component;
2543 dai->driver = dai_drv;
2545 /* see for_each_component_dais */
2546 list_add_tail(&dai->list, &component->dai_list);
2547 component->num_dai++;
2549 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2552 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2555 * snd_soc_unregister_dais - Unregister DAIs from the ASoC core
2557 * @component: The component for which the DAIs should be unregistered
2559 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2561 struct snd_soc_dai *dai, *_dai;
2563 for_each_component_dais_safe(component, dai, _dai)
2564 snd_soc_unregister_dai(dai);
2568 * snd_soc_register_dais - Register a DAI with the ASoC core
2570 * @component: The component the DAIs are registered for
2571 * @dai_drv: DAI driver to use for the DAIs
2572 * @count: Number of DAIs
2574 static int snd_soc_register_dais(struct snd_soc_component *component,
2575 struct snd_soc_dai_driver *dai_drv,
2578 struct snd_soc_dai *dai;
2582 for (i = 0; i < count; i++) {
2583 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2584 component->driver->legacy_dai_naming);
2594 snd_soc_unregister_dais(component);
2599 #define ENDIANNESS_MAP(name) \
2600 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2601 static u64 endianness_format_map[] = {
2602 ENDIANNESS_MAP(S16_),
2603 ENDIANNESS_MAP(U16_),
2604 ENDIANNESS_MAP(S24_),
2605 ENDIANNESS_MAP(U24_),
2606 ENDIANNESS_MAP(S32_),
2607 ENDIANNESS_MAP(U32_),
2608 ENDIANNESS_MAP(S24_3),
2609 ENDIANNESS_MAP(U24_3),
2610 ENDIANNESS_MAP(S20_3),
2611 ENDIANNESS_MAP(U20_3),
2612 ENDIANNESS_MAP(S18_3),
2613 ENDIANNESS_MAP(U18_3),
2614 ENDIANNESS_MAP(FLOAT_),
2615 ENDIANNESS_MAP(FLOAT64_),
2616 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2620 * Fix up the DAI formats for endianness: codecs don't actually see
2621 * the endianness of the data but we're using the CPU format
2622 * definitions which do need to include endianness so we ensure that
2623 * codec DAIs always have both big and little endian variants set.
2625 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2629 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2630 if (stream->formats & endianness_format_map[i])
2631 stream->formats |= endianness_format_map[i];
2634 static void snd_soc_try_rebind_card(void)
2636 struct snd_soc_card *card, *c;
2638 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2639 if (!snd_soc_bind_card(card))
2640 list_del(&card->list);
2643 static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2645 struct snd_soc_card *card = component->card;
2647 snd_soc_unregister_dais(component);
2650 snd_soc_unbind_card(card, false);
2652 list_del(&component->list);
2655 int snd_soc_component_initialize(struct snd_soc_component *component,
2656 const struct snd_soc_component_driver *driver,
2659 INIT_LIST_HEAD(&component->dai_list);
2660 INIT_LIST_HEAD(&component->dobj_list);
2661 INIT_LIST_HEAD(&component->card_list);
2662 INIT_LIST_HEAD(&component->list);
2663 mutex_init(&component->io_mutex);
2665 component->name = fmt_single_name(dev, &component->id);
2666 if (!component->name) {
2667 dev_err(dev, "ASoC: Failed to allocate name\n");
2671 component->dev = dev;
2672 component->driver = driver;
2674 #ifdef CONFIG_DEBUG_FS
2675 if (!component->debugfs_prefix)
2676 component->debugfs_prefix = driver->debugfs_prefix;
2681 EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
2683 int snd_soc_add_component(struct snd_soc_component *component,
2684 struct snd_soc_dai_driver *dai_drv,
2690 mutex_lock(&client_mutex);
2692 if (component->driver->endianness) {
2693 for (i = 0; i < num_dai; i++) {
2694 convert_endianness_formats(&dai_drv[i].playback);
2695 convert_endianness_formats(&dai_drv[i].capture);
2699 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2701 dev_err(component->dev, "ASoC: Failed to register DAIs: %d\n",
2706 if (!component->driver->write && !component->driver->read) {
2707 if (!component->regmap)
2708 component->regmap = dev_get_regmap(component->dev,
2710 if (component->regmap)
2711 snd_soc_component_setup_regmap(component);
2714 /* see for_each_component */
2715 list_add(&component->list, &component_list);
2719 snd_soc_del_component_unlocked(component);
2721 mutex_unlock(&client_mutex);
2724 snd_soc_try_rebind_card();
2728 EXPORT_SYMBOL_GPL(snd_soc_add_component);
2730 int snd_soc_register_component(struct device *dev,
2731 const struct snd_soc_component_driver *component_driver,
2732 struct snd_soc_dai_driver *dai_drv,
2735 struct snd_soc_component *component;
2738 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2742 ret = snd_soc_component_initialize(component, component_driver, dev);
2746 return snd_soc_add_component(component, dai_drv, num_dai);
2748 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2751 * snd_soc_unregister_component_by_driver - Unregister component using a given driver
2752 * from the ASoC core
2754 * @dev: The device to unregister
2755 * @component_driver: The component driver to unregister
2757 void snd_soc_unregister_component_by_driver(struct device *dev,
2758 const struct snd_soc_component_driver *component_driver)
2760 struct snd_soc_component *component;
2762 if (!component_driver)
2765 mutex_lock(&client_mutex);
2766 component = snd_soc_lookup_component_nolocked(dev, component_driver->name);
2770 snd_soc_del_component_unlocked(component);
2773 mutex_unlock(&client_mutex);
2775 EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
2778 * snd_soc_unregister_component - Unregister all related component
2779 * from the ASoC core
2781 * @dev: The device to unregister
2783 void snd_soc_unregister_component(struct device *dev)
2785 mutex_lock(&client_mutex);
2787 struct snd_soc_component *component = snd_soc_lookup_component_nolocked(dev, NULL);
2792 snd_soc_del_component_unlocked(component);
2794 mutex_unlock(&client_mutex);
2796 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2798 /* Retrieve a card's name from device tree */
2799 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2800 const char *propname)
2802 struct device_node *np;
2806 pr_err("card->dev is not set before calling %s\n", __func__);
2810 np = card->dev->of_node;
2812 ret = of_property_read_string_index(np, propname, 0, &card->name);
2814 * EINVAL means the property does not exist. This is fine providing
2815 * card->name was previously set, which is checked later in
2816 * snd_soc_register_card.
2818 if (ret < 0 && ret != -EINVAL) {
2820 "ASoC: Property '%s' could not be read: %d\n",
2827 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2829 static const struct snd_soc_dapm_widget simple_widgets[] = {
2830 SND_SOC_DAPM_MIC("Microphone", NULL),
2831 SND_SOC_DAPM_LINE("Line", NULL),
2832 SND_SOC_DAPM_HP("Headphone", NULL),
2833 SND_SOC_DAPM_SPK("Speaker", NULL),
2836 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2837 const char *propname)
2839 struct device_node *np = card->dev->of_node;
2840 struct snd_soc_dapm_widget *widgets;
2841 const char *template, *wname;
2842 int i, j, num_widgets;
2844 num_widgets = of_property_count_strings(np, propname);
2845 if (num_widgets < 0) {
2847 "ASoC: Property '%s' does not exist\n", propname);
2851 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2855 if (num_widgets & 1) {
2857 "ASoC: Property '%s' length is not even\n", propname);
2863 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2867 "ASoC: Could not allocate memory for widgets\n");
2871 for (i = 0; i < num_widgets; i++) {
2872 int ret = of_property_read_string_index(np, propname,
2876 "ASoC: Property '%s' index %d read error:%d\n",
2877 propname, 2 * i, ret);
2881 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
2882 if (!strncmp(template, simple_widgets[j].name,
2883 strlen(simple_widgets[j].name))) {
2884 widgets[i] = simple_widgets[j];
2889 if (j >= ARRAY_SIZE(simple_widgets)) {
2891 "ASoC: DAPM widget '%s' is not supported\n",
2896 ret = of_property_read_string_index(np, propname,
2901 "ASoC: Property '%s' index %d read error:%d\n",
2902 propname, (2 * i) + 1, ret);
2906 widgets[i].name = wname;
2909 card->of_dapm_widgets = widgets;
2910 card->num_of_dapm_widgets = num_widgets;
2914 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
2916 int snd_soc_of_parse_pin_switches(struct snd_soc_card *card, const char *prop)
2918 const unsigned int nb_controls_max = 16;
2919 const char **strings, *control_name;
2920 struct snd_kcontrol_new *controls;
2921 struct device *dev = card->dev;
2922 unsigned int i, nb_controls;
2925 if (!of_property_read_bool(dev->of_node, prop))
2928 strings = devm_kcalloc(dev, nb_controls_max,
2929 sizeof(*strings), GFP_KERNEL);
2933 ret = of_property_read_string_array(dev->of_node, prop,
2934 strings, nb_controls_max);
2938 nb_controls = (unsigned int)ret;
2940 controls = devm_kcalloc(dev, nb_controls,
2941 sizeof(*controls), GFP_KERNEL);
2945 for (i = 0; i < nb_controls; i++) {
2946 control_name = devm_kasprintf(dev, GFP_KERNEL,
2947 "%s Switch", strings[i]);
2951 controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
2952 controls[i].name = control_name;
2953 controls[i].info = snd_soc_dapm_info_pin_switch;
2954 controls[i].get = snd_soc_dapm_get_pin_switch;
2955 controls[i].put = snd_soc_dapm_put_pin_switch;
2956 controls[i].private_value = (unsigned long)strings[i];
2959 card->controls = controls;
2960 card->num_controls = nb_controls;
2964 EXPORT_SYMBOL_GPL(snd_soc_of_parse_pin_switches);
2966 int snd_soc_of_get_slot_mask(struct device_node *np,
2967 const char *prop_name,
2971 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
2977 for (i = 0; i < val; i++)
2978 if (be32_to_cpup(&of_slot_mask[i]))
2983 EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
2985 int snd_soc_of_parse_tdm_slot(struct device_node *np,
2986 unsigned int *tx_mask,
2987 unsigned int *rx_mask,
2988 unsigned int *slots,
2989 unsigned int *slot_width)
2995 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
2997 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
2999 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3000 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3008 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3009 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3019 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3021 void snd_soc_dlc_use_cpu_as_platform(struct snd_soc_dai_link_component *platforms,
3022 struct snd_soc_dai_link_component *cpus)
3024 platforms->of_node = cpus->of_node;
3025 platforms->dai_args = cpus->dai_args;
3027 EXPORT_SYMBOL_GPL(snd_soc_dlc_use_cpu_as_platform);
3029 void snd_soc_of_parse_node_prefix(struct device_node *np,
3030 struct snd_soc_codec_conf *codec_conf,
3031 struct device_node *of_node,
3032 const char *propname)
3037 ret = of_property_read_string(np, propname, &str);
3039 /* no prefix is not error */
3043 codec_conf->dlc.of_node = of_node;
3044 codec_conf->name_prefix = str;
3046 EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
3048 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3049 const char *propname)
3051 struct device_node *np = card->dev->of_node;
3053 struct snd_soc_dapm_route *routes;
3056 num_routes = of_property_count_strings(np, propname);
3057 if (num_routes < 0 || num_routes & 1) {
3059 "ASoC: Property '%s' does not exist or its length is not even\n",
3065 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3069 "ASoC: Could not allocate DAPM route table\n");
3073 for (i = 0; i < num_routes; i++) {
3074 int ret = of_property_read_string_index(np, propname,
3075 2 * i, &routes[i].sink);
3078 "ASoC: Property '%s' index %d could not be read: %d\n",
3079 propname, 2 * i, ret);
3082 ret = of_property_read_string_index(np, propname,
3083 (2 * i) + 1, &routes[i].source);
3086 "ASoC: Property '%s' index %d could not be read: %d\n",
3087 propname, (2 * i) + 1, ret);
3092 card->num_of_dapm_routes = num_routes;
3093 card->of_dapm_routes = routes;
3097 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3099 int snd_soc_of_parse_aux_devs(struct snd_soc_card *card, const char *propname)
3101 struct device_node *node = card->dev->of_node;
3102 struct snd_soc_aux_dev *aux;
3105 num = of_count_phandle_with_args(node, propname, NULL);
3106 if (num == -ENOENT) {
3108 } else if (num < 0) {
3109 dev_err(card->dev, "ASOC: Property '%s' could not be read: %d\n",
3114 aux = devm_kcalloc(card->dev, num, sizeof(*aux), GFP_KERNEL);
3117 card->aux_dev = aux;
3118 card->num_aux_devs = num;
3120 for_each_card_pre_auxs(card, i, aux) {
3121 aux->dlc.of_node = of_parse_phandle(node, propname, i);
3122 if (!aux->dlc.of_node)
3128 EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs);
3130 unsigned int snd_soc_daifmt_clock_provider_flipped(unsigned int dai_fmt)
3132 unsigned int inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
3134 switch (dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
3135 case SND_SOC_DAIFMT_CBP_CFP:
3136 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFC;
3138 case SND_SOC_DAIFMT_CBP_CFC:
3139 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFP;
3141 case SND_SOC_DAIFMT_CBC_CFP:
3142 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFC;
3144 case SND_SOC_DAIFMT_CBC_CFC:
3145 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFP;
3151 EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_flipped);
3153 unsigned int snd_soc_daifmt_clock_provider_from_bitmap(unsigned int bit_frame)
3156 * bit_frame is return value from
3157 * snd_soc_daifmt_parse_clock_provider_raw()
3161 switch (bit_frame) {
3163 return SND_SOC_DAIFMT_CBP_CFP;
3165 return SND_SOC_DAIFMT_CBP_CFC;
3167 return SND_SOC_DAIFMT_CBC_CFP;
3169 return SND_SOC_DAIFMT_CBC_CFC;
3174 EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_from_bitmap);
3176 unsigned int snd_soc_daifmt_parse_format(struct device_node *np,
3181 unsigned int format = 0;
3187 } of_fmt_table[] = {
3188 { "i2s", SND_SOC_DAIFMT_I2S },
3189 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3190 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3191 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3192 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3193 { "ac97", SND_SOC_DAIFMT_AC97 },
3194 { "pdm", SND_SOC_DAIFMT_PDM},
3195 { "msb", SND_SOC_DAIFMT_MSB },
3196 { "lsb", SND_SOC_DAIFMT_LSB },
3203 * check "dai-format = xxx"
3204 * or "[prefix]format = xxx"
3205 * SND_SOC_DAIFMT_FORMAT_MASK area
3207 ret = of_property_read_string(np, "dai-format", &str);
3209 snprintf(prop, sizeof(prop), "%sformat", prefix);
3210 ret = of_property_read_string(np, prop, &str);
3215 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3216 if (strcmp(str, of_fmt_table[i].name) == 0) {
3217 format |= of_fmt_table[i].val;
3224 * check "[prefix]continuous-clock"
3225 * SND_SOC_DAIFMT_CLOCK_MASK area
3227 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3228 if (of_property_read_bool(np, prop))
3229 format |= SND_SOC_DAIFMT_CONT;
3231 format |= SND_SOC_DAIFMT_GATED;
3234 * check "[prefix]bitclock-inversion"
3235 * check "[prefix]frame-inversion"
3236 * SND_SOC_DAIFMT_INV_MASK area
3238 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3239 bit = !!of_get_property(np, prop, NULL);
3241 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3242 frame = !!of_get_property(np, prop, NULL);
3244 switch ((bit << 4) + frame) {
3246 format |= SND_SOC_DAIFMT_IB_IF;
3249 format |= SND_SOC_DAIFMT_IB_NF;
3252 format |= SND_SOC_DAIFMT_NB_IF;
3255 /* SND_SOC_DAIFMT_NB_NF is default */
3261 EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_format);
3263 unsigned int snd_soc_daifmt_parse_clock_provider_raw(struct device_node *np,
3265 struct device_node **bitclkmaster,
3266 struct device_node **framemaster)
3269 unsigned int bit, frame;
3275 * check "[prefix]bitclock-master"
3276 * check "[prefix]frame-master"
3278 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3279 bit = !!of_get_property(np, prop, NULL);
3280 if (bit && bitclkmaster)
3281 *bitclkmaster = of_parse_phandle(np, prop, 0);
3283 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3284 frame = !!of_get_property(np, prop, NULL);
3285 if (frame && framemaster)
3286 *framemaster = of_parse_phandle(np, prop, 0);
3290 * It will be parameter of
3291 * snd_soc_daifmt_clock_provider_from_bitmap()
3293 return (bit << 4) + frame;
3295 EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_clock_provider_raw);
3297 int snd_soc_get_stream_cpu(struct snd_soc_dai_link *dai_link, int stream)
3303 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3304 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3307 * CPU : SNDRV_PCM_STREAM_CAPTURE
3308 * Codec: SNDRV_PCM_STREAM_CAPTURE
3310 if (!dai_link->c2c_params)
3317 * CPU : SNDRV_PCM_STREAM_CAPTURE
3318 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3321 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3322 * Codec: SNDRV_PCM_STREAM_CAPTURE
3324 if (stream == SNDRV_PCM_STREAM_CAPTURE)
3325 return SNDRV_PCM_STREAM_PLAYBACK;
3327 return SNDRV_PCM_STREAM_CAPTURE;
3329 EXPORT_SYMBOL_GPL(snd_soc_get_stream_cpu);
3331 int snd_soc_get_dai_id(struct device_node *ep)
3333 struct snd_soc_component *component;
3334 struct snd_soc_dai_link_component dlc = {
3335 .of_node = of_graph_get_port_parent(ep),
3341 * For example HDMI case, HDMI has video/sound port,
3342 * but ALSA SoC needs sound port number only.
3343 * Thus counting HDMI DT port/endpoint doesn't work.
3344 * Then, it should have .of_xlate_dai_id
3347 mutex_lock(&client_mutex);
3348 component = soc_find_component(&dlc);
3350 ret = snd_soc_component_of_xlate_dai_id(component, ep);
3351 mutex_unlock(&client_mutex);
3353 of_node_put(dlc.of_node);
3357 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3359 int snd_soc_get_dlc(const struct of_phandle_args *args, struct snd_soc_dai_link_component *dlc)
3361 struct snd_soc_component *pos;
3362 int ret = -EPROBE_DEFER;
3364 mutex_lock(&client_mutex);
3365 for_each_component(pos) {
3366 struct device_node *component_of_node = soc_component_to_node(pos);
3368 if (component_of_node != args->np || !pos->num_dai)
3371 ret = snd_soc_component_of_xlate_dai_name(pos, args, &dlc->dai_name);
3372 if (ret == -ENOTSUPP) {
3373 struct snd_soc_dai *dai;
3376 switch (args->args_count) {
3378 id = 0; /* same as dai_drv[0] */
3388 if (id < 0 || id >= pos->num_dai) {
3395 /* find target DAI */
3396 for_each_component_dais(pos, dai) {
3402 dlc->dai_name = snd_soc_dai_name_get(dai);
3405 * if another error than ENOTSUPP is returned go on and
3406 * check if another component is provided with the same
3407 * node. This may happen if a device provides several
3417 dlc->of_node = args->np;
3419 mutex_unlock(&client_mutex);
3422 EXPORT_SYMBOL_GPL(snd_soc_get_dlc);
3424 int snd_soc_of_get_dlc(struct device_node *of_node,
3425 struct of_phandle_args *args,
3426 struct snd_soc_dai_link_component *dlc,
3429 struct of_phandle_args __args;
3435 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3436 "#sound-dai-cells", index, args);
3440 return snd_soc_get_dlc(args, dlc);
3442 EXPORT_SYMBOL_GPL(snd_soc_of_get_dlc);
3444 int snd_soc_get_dai_name(const struct of_phandle_args *args,
3445 const char **dai_name)
3447 struct snd_soc_dai_link_component dlc;
3448 int ret = snd_soc_get_dlc(args, &dlc);
3451 *dai_name = dlc.dai_name;
3455 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3457 int snd_soc_of_get_dai_name(struct device_node *of_node,
3458 const char **dai_name, int index)
3460 struct snd_soc_dai_link_component dlc;
3461 int ret = snd_soc_of_get_dlc(of_node, NULL, &dlc, index);
3464 *dai_name = dlc.dai_name;
3468 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3470 struct snd_soc_dai *snd_soc_get_dai_via_args(struct of_phandle_args *dai_args)
3472 struct snd_soc_dai *dai;
3473 struct snd_soc_component *component;
3475 mutex_lock(&client_mutex);
3476 for_each_component(component) {
3477 for_each_component_dais(component, dai)
3478 if (snd_soc_is_match_dai_args(dai->driver->dai_args, dai_args))
3483 mutex_unlock(&client_mutex);
3486 EXPORT_SYMBOL_GPL(snd_soc_get_dai_via_args);
3488 static void __snd_soc_of_put_component(struct snd_soc_dai_link_component *component)
3490 if (component->of_node) {
3491 of_node_put(component->of_node);
3492 component->of_node = NULL;
3496 static int __snd_soc_of_get_dai_link_component_alloc(
3497 struct device *dev, struct device_node *of_node,
3498 struct snd_soc_dai_link_component **ret_component,
3501 struct snd_soc_dai_link_component *component;
3504 /* Count the number of CPUs/CODECs */
3505 num = of_count_phandle_with_args(of_node, "sound-dai", "#sound-dai-cells");
3508 dev_err(dev, "No 'sound-dai' property\n");
3510 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3513 component = devm_kcalloc(dev, num, sizeof(*component), GFP_KERNEL);
3517 *ret_component = component;
3524 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3525 * @dai_link: DAI link
3527 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3529 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3531 struct snd_soc_dai_link_component *component;
3534 for_each_link_codecs(dai_link, index, component)
3535 __snd_soc_of_put_component(component);
3537 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3540 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3542 * @of_node: Device node
3543 * @dai_link: DAI link
3545 * Builds an array of CODEC DAI components from the DAI link property
3547 * The array is set in the DAI link and the number of DAIs is set accordingly.
3548 * The device nodes in the array (of_node) must be dereferenced by calling
3549 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3551 * Returns 0 for success
3553 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3554 struct device_node *of_node,
3555 struct snd_soc_dai_link *dai_link)
3557 struct snd_soc_dai_link_component *component;
3560 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3561 &dai_link->codecs, &dai_link->num_codecs);
3565 /* Parse the list */
3566 for_each_link_codecs(dai_link, index, component) {
3567 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3573 snd_soc_of_put_dai_link_codecs(dai_link);
3574 dai_link->codecs = NULL;
3575 dai_link->num_codecs = 0;
3578 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3581 * snd_soc_of_put_dai_link_cpus - Dereference device nodes in the codecs array
3582 * @dai_link: DAI link
3584 * Dereference device nodes acquired by snd_soc_of_get_dai_link_cpus().
3586 void snd_soc_of_put_dai_link_cpus(struct snd_soc_dai_link *dai_link)
3588 struct snd_soc_dai_link_component *component;
3591 for_each_link_cpus(dai_link, index, component)
3592 __snd_soc_of_put_component(component);
3594 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_cpus);
3597 * snd_soc_of_get_dai_link_cpus - Parse a list of CPU DAIs in the devicetree
3599 * @of_node: Device node
3600 * @dai_link: DAI link
3602 * Is analogous to snd_soc_of_get_dai_link_codecs but parses a list of CPU DAIs
3605 * Returns 0 for success
3607 int snd_soc_of_get_dai_link_cpus(struct device *dev,
3608 struct device_node *of_node,
3609 struct snd_soc_dai_link *dai_link)
3611 struct snd_soc_dai_link_component *component;
3614 /* Count the number of CPUs */
3615 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3616 &dai_link->cpus, &dai_link->num_cpus);
3620 /* Parse the list */
3621 for_each_link_cpus(dai_link, index, component) {
3622 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3628 snd_soc_of_put_dai_link_cpus(dai_link);
3629 dai_link->cpus = NULL;
3630 dai_link->num_cpus = 0;
3633 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_cpus);
3635 static int __init snd_soc_init(void)
3639 snd_soc_debugfs_init();
3640 ret = snd_soc_util_init();
3644 ret = platform_driver_register(&soc_driver);
3650 snd_soc_util_exit();
3652 snd_soc_debugfs_exit();
3655 module_init(snd_soc_init);
3657 static void __exit snd_soc_exit(void)
3659 snd_soc_util_exit();
3660 snd_soc_debugfs_exit();
3662 platform_driver_unregister(&soc_driver);
3664 module_exit(snd_soc_exit);
3666 /* Module information */
3667 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3668 MODULE_DESCRIPTION("ALSA SoC Core");
3669 MODULE_LICENSE("GPL");
3670 MODULE_ALIAS("platform:soc-audio");