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 sprintf(buf, "%ld\n", rtd->pmdown_time);
78 static ssize_t pmdown_time_set(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(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
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->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(
233 struct snd_soc_component *component)
237 static inline void soc_cleanup_component_debugfs(
238 struct snd_soc_component *component)
242 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
246 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
250 static inline void snd_soc_debugfs_init(void)
254 static inline void snd_soc_debugfs_exit(void)
260 static int snd_soc_rtd_add_component(struct snd_soc_pcm_runtime *rtd,
261 struct snd_soc_component *component)
263 struct snd_soc_component *comp;
266 for_each_rtd_components(rtd, i, comp) {
267 /* already connected */
268 if (comp == component)
272 /* see for_each_rtd_components */
273 rtd->components[rtd->num_components] = component;
274 rtd->num_components++;
279 struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
280 const char *driver_name)
282 struct snd_soc_component *component;
291 * snd_soc_rtdcom_lookup() will find component from rtd by using
292 * specified driver name.
293 * But, if many components which have same driver name are connected
294 * to 1 rtd, this function will return 1st found component.
296 for_each_rtd_components(rtd, i, component) {
297 const char *component_name = component->driver->name;
302 if ((component_name == driver_name) ||
303 strcmp(component_name, driver_name) == 0)
309 EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
311 struct snd_soc_component
312 *snd_soc_lookup_component_nolocked(struct device *dev, const char *driver_name)
314 struct snd_soc_component *component;
315 struct snd_soc_component *found_component;
317 found_component = NULL;
318 for_each_component(component) {
319 if ((dev == component->dev) &&
321 (driver_name == component->driver->name) ||
322 (strcmp(component->driver->name, driver_name) == 0))) {
323 found_component = component;
328 return found_component;
330 EXPORT_SYMBOL_GPL(snd_soc_lookup_component_nolocked);
332 struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
333 const char *driver_name)
335 struct snd_soc_component *component;
337 mutex_lock(&client_mutex);
338 component = snd_soc_lookup_component_nolocked(dev, driver_name);
339 mutex_unlock(&client_mutex);
343 EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
345 struct snd_soc_pcm_runtime
346 *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
347 struct snd_soc_dai_link *dai_link)
349 struct snd_soc_pcm_runtime *rtd;
351 for_each_card_rtds(card, rtd) {
352 if (rtd->dai_link == dai_link)
355 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link->name);
358 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
361 * Power down the audio subsystem pmdown_time msecs after close is called.
362 * This is to ensure there are no pops or clicks in between any music tracks
363 * due to DAPM power cycling.
365 void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
367 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
368 int playback = SNDRV_PCM_STREAM_PLAYBACK;
370 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
373 "ASoC: pop wq checking: %s status: %s waiting: %s\n",
374 codec_dai->driver->playback.stream_name,
375 snd_soc_dai_stream_active(codec_dai, playback) ?
376 "active" : "inactive",
377 rtd->pop_wait ? "yes" : "no");
379 /* are we waiting on this codec DAI stream */
380 if (rtd->pop_wait == 1) {
382 snd_soc_dapm_stream_event(rtd, playback,
383 SND_SOC_DAPM_STREAM_STOP);
386 mutex_unlock(&rtd->card->pcm_mutex);
388 EXPORT_SYMBOL_GPL(snd_soc_close_delayed_work);
390 static void soc_release_rtd_dev(struct device *dev)
392 /* "dev" means "rtd->dev" */
396 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
401 list_del(&rtd->list);
403 if (delayed_work_pending(&rtd->delayed_work))
404 flush_delayed_work(&rtd->delayed_work);
405 snd_soc_pcm_component_free(rtd);
408 * we don't need to call kfree() for rtd->dev
410 * soc_release_rtd_dev()
412 * We don't need rtd->dev NULL check, because
413 * it is alloced *before* rtd.
415 * soc_new_pcm_runtime()
417 * We don't need to mind freeing for rtd,
418 * because it was created from dev (= rtd->dev)
420 * soc_new_pcm_runtime()
422 * rtd = devm_kzalloc(dev, ...);
425 device_unregister(rtd->dev);
428 static void close_delayed_work(struct work_struct *work) {
429 struct snd_soc_pcm_runtime *rtd =
430 container_of(work, struct snd_soc_pcm_runtime,
433 if (rtd->close_delayed_work_func)
434 rtd->close_delayed_work_func(rtd);
437 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
438 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
440 struct snd_soc_pcm_runtime *rtd;
441 struct snd_soc_component *component;
449 dev = kzalloc(sizeof(struct device), GFP_KERNEL);
453 dev->parent = card->dev;
454 dev->release = soc_release_rtd_dev;
456 dev_set_name(dev, "%s", dai_link->name);
458 ret = device_register(dev);
460 put_device(dev); /* soc_release_rtd_dev */
467 rtd = devm_kzalloc(dev,
469 sizeof(*component) * (dai_link->num_cpus +
470 dai_link->num_codecs +
471 dai_link->num_platforms),
474 device_unregister(dev);
479 INIT_LIST_HEAD(&rtd->list);
480 for_each_pcm_streams(stream) {
481 INIT_LIST_HEAD(&rtd->dpcm[stream].be_clients);
482 INIT_LIST_HEAD(&rtd->dpcm[stream].fe_clients);
484 dev_set_drvdata(dev, rtd);
485 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
490 rtd->dais = devm_kcalloc(dev, dai_link->num_cpus + dai_link->num_codecs,
491 sizeof(struct snd_soc_dai *),
497 * dais = [][][][][][][][][][][][][][][][][][]
498 * ^cpu_dais ^codec_dais
499 * |--- num_cpus ---|--- num_codecs --|
502 * asoc_rtd_to_codec()
504 rtd->num_cpus = dai_link->num_cpus;
505 rtd->num_codecs = dai_link->num_codecs;
507 rtd->dai_link = dai_link;
508 rtd->num = card->num_rtd++;
510 /* see for_each_card_rtds */
511 list_add_tail(&rtd->list, &card->rtd_list);
513 ret = device_add_groups(dev, soc_dev_attr_groups);
520 soc_free_pcm_runtime(rtd);
524 static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
526 struct snd_soc_pcm_runtime *rtd;
528 for_each_card_rtds(card, rtd)
529 flush_delayed_work(&rtd->delayed_work);
532 #ifdef CONFIG_PM_SLEEP
533 static void soc_playback_digital_mute(struct snd_soc_card *card, int mute)
535 struct snd_soc_pcm_runtime *rtd;
536 struct snd_soc_dai *dai;
537 int playback = SNDRV_PCM_STREAM_PLAYBACK;
540 for_each_card_rtds(card, rtd) {
542 if (rtd->dai_link->ignore_suspend)
545 for_each_rtd_dais(rtd, i, dai) {
546 if (snd_soc_dai_stream_active(dai, playback))
547 snd_soc_dai_digital_mute(dai, mute, playback);
552 static void soc_dapm_suspend_resume(struct snd_soc_card *card, int event)
554 struct snd_soc_pcm_runtime *rtd;
557 for_each_card_rtds(card, rtd) {
559 if (rtd->dai_link->ignore_suspend)
562 for_each_pcm_streams(stream)
563 snd_soc_dapm_stream_event(rtd, stream, event);
567 /* powers down audio subsystem for suspend */
568 int snd_soc_suspend(struct device *dev)
570 struct snd_soc_card *card = dev_get_drvdata(dev);
571 struct snd_soc_component *component;
572 struct snd_soc_pcm_runtime *rtd;
575 /* If the card is not initialized yet there is nothing to do */
576 if (!card->instantiated)
580 * Due to the resume being scheduled into a workqueue we could
581 * suspend before that's finished - wait for it to complete.
583 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
585 /* we're going to block userspace touching us until resume completes */
586 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
588 /* mute any active DACs */
589 soc_playback_digital_mute(card, 1);
591 /* suspend all pcms */
592 for_each_card_rtds(card, rtd) {
593 if (rtd->dai_link->ignore_suspend)
596 snd_pcm_suspend_all(rtd->pcm);
599 snd_soc_card_suspend_pre(card);
601 /* close any waiting streams */
602 snd_soc_flush_all_delayed_work(card);
604 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_SUSPEND);
606 /* Recheck all endpoints too, their state is affected by suspend */
607 dapm_mark_endpoints_dirty(card);
608 snd_soc_dapm_sync(&card->dapm);
610 /* suspend all COMPONENTs */
611 for_each_card_rtds(card, rtd) {
613 if (rtd->dai_link->ignore_suspend)
616 for_each_rtd_components(rtd, i, component) {
617 struct snd_soc_dapm_context *dapm =
618 snd_soc_component_get_dapm(component);
621 * ignore if component was already suspended
623 if (snd_soc_component_is_suspended(component))
627 * If there are paths active then the COMPONENT will be
628 * held with bias _ON and should not be suspended.
630 switch (snd_soc_dapm_get_bias_level(dapm)) {
631 case SND_SOC_BIAS_STANDBY:
633 * If the COMPONENT is capable of idle
634 * bias off then being in STANDBY
635 * means it's doing something,
636 * otherwise fall through.
638 if (dapm->idle_bias_off) {
639 dev_dbg(component->dev,
640 "ASoC: idle_bias_off CODEC on over suspend\n");
645 case SND_SOC_BIAS_OFF:
646 snd_soc_component_suspend(component);
647 if (component->regmap)
648 regcache_mark_dirty(component->regmap);
649 /* deactivate pins to sleep state */
650 pinctrl_pm_select_sleep_state(component->dev);
653 dev_dbg(component->dev,
654 "ASoC: COMPONENT is on over suspend\n");
660 snd_soc_card_suspend_post(card);
664 EXPORT_SYMBOL_GPL(snd_soc_suspend);
667 * deferred resume work, so resume can complete before we finished
668 * setting our codec back up, which can be very slow on I2C
670 static void soc_resume_deferred(struct work_struct *work)
672 struct snd_soc_card *card =
673 container_of(work, struct snd_soc_card,
674 deferred_resume_work);
675 struct snd_soc_component *component;
678 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
679 * so userspace apps are blocked from touching us
682 dev_dbg(card->dev, "ASoC: starting resume work\n");
684 /* Bring us up into D2 so that DAPM starts enabling things */
685 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
687 snd_soc_card_resume_pre(card);
689 for_each_card_components(card, component) {
690 if (snd_soc_component_is_suspended(component))
691 snd_soc_component_resume(component);
694 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_RESUME);
696 /* unmute any active DACs */
697 soc_playback_digital_mute(card, 0);
699 snd_soc_card_resume_post(card);
701 dev_dbg(card->dev, "ASoC: resume work completed\n");
703 /* Recheck all endpoints too, their state is affected by suspend */
704 dapm_mark_endpoints_dirty(card);
705 snd_soc_dapm_sync(&card->dapm);
707 /* userspace can access us now we are back as we were before */
708 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
711 /* powers up audio subsystem after a suspend */
712 int snd_soc_resume(struct device *dev)
714 struct snd_soc_card *card = dev_get_drvdata(dev);
715 struct snd_soc_component *component;
717 /* If the card is not initialized yet there is nothing to do */
718 if (!card->instantiated)
721 /* activate pins from sleep state */
722 for_each_card_components(card, component)
723 if (snd_soc_component_active(component))
724 pinctrl_pm_select_default_state(component->dev);
726 dev_dbg(dev, "ASoC: Scheduling resume work\n");
727 if (!schedule_work(&card->deferred_resume_work))
728 dev_err(dev, "ASoC: resume work item may be lost\n");
732 EXPORT_SYMBOL_GPL(snd_soc_resume);
734 static void soc_resume_init(struct snd_soc_card *card)
736 /* deferred resume work */
737 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
740 #define snd_soc_suspend NULL
741 #define snd_soc_resume NULL
742 static inline void soc_resume_init(struct snd_soc_card *card)
747 static struct device_node
748 *soc_component_to_node(struct snd_soc_component *component)
750 struct device_node *of_node;
752 of_node = component->dev->of_node;
753 if (!of_node && component->dev->parent)
754 of_node = component->dev->parent->of_node;
759 static int snd_soc_is_matching_component(
760 const struct snd_soc_dai_link_component *dlc,
761 struct snd_soc_component *component)
763 struct device_node *component_of_node;
768 component_of_node = soc_component_to_node(component);
770 if (dlc->of_node && component_of_node != dlc->of_node)
772 if (dlc->name && strcmp(component->name, dlc->name))
778 static struct snd_soc_component *soc_find_component(
779 const struct snd_soc_dai_link_component *dlc)
781 struct snd_soc_component *component;
783 lockdep_assert_held(&client_mutex);
788 * It returns *1st* found component, but some driver
789 * has few components by same of_node/name
791 * CPU component and generic DMAEngine component
793 for_each_component(component)
794 if (snd_soc_is_matching_component(dlc, component))
801 * snd_soc_find_dai - Find a registered DAI
803 * @dlc: name of the DAI or the DAI driver and optional component info to match
805 * This function will search all registered components and their DAIs to
806 * find the DAI of the same name. The component's of_node and name
807 * should also match if being specified.
809 * Return: pointer of DAI, or NULL if not found.
811 struct snd_soc_dai *snd_soc_find_dai(
812 const struct snd_soc_dai_link_component *dlc)
814 struct snd_soc_component *component;
815 struct snd_soc_dai *dai;
817 lockdep_assert_held(&client_mutex);
819 /* Find CPU DAI from registered DAIs */
820 for_each_component(component) {
821 if (!snd_soc_is_matching_component(dlc, component))
823 for_each_component_dais(component, dai) {
824 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
825 && (!dai->driver->name
826 || strcmp(dai->driver->name, dlc->dai_name)))
835 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
837 struct snd_soc_dai *snd_soc_find_dai_with_mutex(
838 const struct snd_soc_dai_link_component *dlc)
840 struct snd_soc_dai *dai;
842 mutex_lock(&client_mutex);
843 dai = snd_soc_find_dai(dlc);
844 mutex_unlock(&client_mutex);
848 EXPORT_SYMBOL_GPL(snd_soc_find_dai_with_mutex);
850 static int soc_dai_link_sanity_check(struct snd_soc_card *card,
851 struct snd_soc_dai_link *link)
854 struct snd_soc_dai_link_component *cpu, *codec, *platform;
856 for_each_link_codecs(link, i, codec) {
858 * Codec must be specified by 1 of name or OF node,
859 * not both or neither.
861 if (!!codec->name == !!codec->of_node) {
862 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
867 /* Codec DAI name must be specified */
868 if (!codec->dai_name) {
869 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
875 * Defer card registration if codec component is not added to
878 if (!soc_find_component(codec)) {
880 "ASoC: codec component %s not found for link %s\n",
881 codec->name, link->name);
882 return -EPROBE_DEFER;
886 for_each_link_platforms(link, i, platform) {
888 * Platform may be specified by either name or OF node, but it
889 * can be left unspecified, then no components will be inserted
892 if (!!platform->name == !!platform->of_node) {
894 "ASoC: Neither/both platform name/of_node are set for %s\n",
900 * Defer card registration if platform component is not added to
903 if (!soc_find_component(platform)) {
905 "ASoC: platform component %s not found for link %s\n",
906 platform->name, link->name);
907 return -EPROBE_DEFER;
911 for_each_link_cpus(link, i, cpu) {
913 * CPU device may be specified by either name or OF node, but
914 * can be left unspecified, and will be matched based on DAI
917 if (cpu->name && cpu->of_node) {
919 "ASoC: Neither/both cpu name/of_node are set for %s\n",
925 * Defer card registration if cpu dai component is not added to
928 if ((cpu->of_node || cpu->name) &&
929 !soc_find_component(cpu)) {
931 "ASoC: cpu component %s not found for link %s\n",
932 cpu->name, link->name);
933 return -EPROBE_DEFER;
937 * At least one of CPU DAI name or CPU device name/node must be
940 if (!cpu->dai_name &&
941 !(cpu->name || cpu->of_node)) {
943 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
953 * snd_soc_remove_pcm_runtime - Remove a pcm_runtime from card
954 * @card: The ASoC card to which the pcm_runtime has
955 * @rtd: The pcm_runtime to remove
957 * This function removes a pcm_runtime from the ASoC card.
959 void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
960 struct snd_soc_pcm_runtime *rtd)
962 lockdep_assert_held(&client_mutex);
964 /* release machine specific resources */
965 snd_soc_link_exit(rtd);
968 * Notify the machine driver for extra destruction
970 snd_soc_card_remove_dai_link(card, rtd->dai_link);
972 soc_free_pcm_runtime(rtd);
974 EXPORT_SYMBOL_GPL(snd_soc_remove_pcm_runtime);
977 * snd_soc_add_pcm_runtime - Add a pcm_runtime dynamically via dai_link
978 * @card: The ASoC card to which the pcm_runtime is added
979 * @dai_link: The DAI link to find pcm_runtime
981 * This function adds a pcm_runtime ASoC card by using dai_link.
983 * Note: Topology can use this API to add pcm_runtime when probing the
984 * topology component. And machine drivers can still define static
985 * DAI links in dai_link array.
987 int snd_soc_add_pcm_runtime(struct snd_soc_card *card,
988 struct snd_soc_dai_link *dai_link)
990 struct snd_soc_pcm_runtime *rtd;
991 struct snd_soc_dai_link_component *codec, *platform, *cpu;
992 struct snd_soc_component *component;
995 lockdep_assert_held(&client_mutex);
998 * Notify the machine driver for extra initialization
1000 ret = snd_soc_card_add_dai_link(card, dai_link);
1004 if (dai_link->ignore)
1007 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1009 ret = soc_dai_link_sanity_check(card, dai_link);
1013 rtd = soc_new_pcm_runtime(card, dai_link);
1017 for_each_link_cpus(dai_link, i, cpu) {
1018 asoc_rtd_to_cpu(rtd, i) = snd_soc_find_dai(cpu);
1019 if (!asoc_rtd_to_cpu(rtd, i)) {
1020 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1024 snd_soc_rtd_add_component(rtd, asoc_rtd_to_cpu(rtd, i)->component);
1027 /* Find CODEC from registered CODECs */
1028 for_each_link_codecs(dai_link, i, codec) {
1029 asoc_rtd_to_codec(rtd, i) = snd_soc_find_dai(codec);
1030 if (!asoc_rtd_to_codec(rtd, i)) {
1031 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
1036 snd_soc_rtd_add_component(rtd, asoc_rtd_to_codec(rtd, i)->component);
1039 /* Find PLATFORM from registered PLATFORMs */
1040 for_each_link_platforms(dai_link, i, platform) {
1041 for_each_component(component) {
1042 if (!snd_soc_is_matching_component(platform, component))
1045 snd_soc_rtd_add_component(rtd, component);
1052 snd_soc_remove_pcm_runtime(card, rtd);
1053 return -EPROBE_DEFER;
1055 EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtime);
1057 static int soc_init_pcm_runtime(struct snd_soc_card *card,
1058 struct snd_soc_pcm_runtime *rtd)
1060 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1061 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
1062 struct snd_soc_component *component;
1065 /* set default power off timeout */
1066 rtd->pmdown_time = pmdown_time;
1068 /* do machine specific initialization */
1069 ret = snd_soc_link_init(rtd);
1073 if (dai_link->dai_fmt) {
1074 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1079 /* add DPCM sysfs entries */
1080 soc_dpcm_debugfs_add(rtd);
1085 * most drivers will register their PCMs using DAI link ordering but
1086 * topology based drivers can use the DAI link id field to set PCM
1087 * device number and then use rtd + a base offset of the BEs.
1089 for_each_rtd_components(rtd, i, component) {
1090 if (!component->driver->use_dai_pcm_id)
1093 if (rtd->dai_link->no_pcm)
1094 num += component->driver->be_pcm_base;
1096 num = rtd->dai_link->id;
1099 /* create compress_device if possible */
1100 ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1101 if (ret != -ENOTSUPP)
1104 /* create the pcm */
1105 ret = soc_new_pcm(rtd, num);
1107 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1108 dai_link->stream_name, ret);
1112 return snd_soc_pcm_dai_new(rtd);
1115 static void soc_set_name_prefix(struct snd_soc_card *card,
1116 struct snd_soc_component *component)
1118 struct device_node *of_node = soc_component_to_node(component);
1122 for (i = 0; i < card->num_configs; i++) {
1123 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1125 if (snd_soc_is_matching_component(&map->dlc, component) &&
1127 component->name_prefix = map->name_prefix;
1133 * If there is no configuration table or no match in the table,
1134 * check if a prefix is provided in the node
1136 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1140 component->name_prefix = str;
1143 static void soc_remove_component(struct snd_soc_component *component,
1147 if (!component->card)
1151 snd_soc_component_remove(component);
1153 /* For framework level robustness */
1154 snd_soc_component_set_jack(component, NULL, NULL);
1156 list_del_init(&component->card_list);
1157 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1158 soc_cleanup_component_debugfs(component);
1159 component->card = NULL;
1160 snd_soc_component_module_put_when_remove(component);
1163 static int soc_probe_component(struct snd_soc_card *card,
1164 struct snd_soc_component *component)
1166 struct snd_soc_dapm_context *dapm =
1167 snd_soc_component_get_dapm(component);
1168 struct snd_soc_dai *dai;
1172 if (snd_soc_component_is_dummy(component))
1175 if (component->card) {
1176 if (component->card != card) {
1177 dev_err(component->dev,
1178 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1179 card->name, component->card->name);
1185 ret = snd_soc_component_module_get_when_probe(component);
1189 component->card = card;
1190 soc_set_name_prefix(card, component);
1192 soc_init_component_debugfs(component);
1194 snd_soc_dapm_init(dapm, card, component);
1196 ret = snd_soc_dapm_new_controls(dapm,
1197 component->driver->dapm_widgets,
1198 component->driver->num_dapm_widgets);
1201 dev_err(component->dev,
1202 "Failed to create new controls %d\n", ret);
1206 for_each_component_dais(component, dai) {
1207 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1209 dev_err(component->dev,
1210 "Failed to create DAI widgets %d\n", ret);
1215 ret = snd_soc_component_probe(component);
1219 WARN(dapm->idle_bias_off &&
1220 dapm->bias_level != SND_SOC_BIAS_OFF,
1221 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1226 * machine specific init
1228 * snd_soc_component_set_aux()
1230 ret = snd_soc_component_init(component);
1234 ret = snd_soc_add_component_controls(component,
1235 component->driver->controls,
1236 component->driver->num_controls);
1240 ret = snd_soc_dapm_add_routes(dapm,
1241 component->driver->dapm_routes,
1242 component->driver->num_dapm_routes);
1244 if (card->disable_route_checks) {
1246 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1250 "%s: snd_soc_dapm_add_routes failed: %d\n",
1256 /* see for_each_card_components */
1257 list_add(&component->card_list, &card->component_dev_list);
1261 soc_remove_component(component, probed);
1266 static void soc_remove_link_dais(struct snd_soc_card *card)
1268 struct snd_soc_pcm_runtime *rtd;
1271 for_each_comp_order(order) {
1272 for_each_card_rtds(card, rtd) {
1273 /* remove all rtd connected DAIs in good order */
1274 snd_soc_pcm_dai_remove(rtd, order);
1279 static int soc_probe_link_dais(struct snd_soc_card *card)
1281 struct snd_soc_pcm_runtime *rtd;
1284 for_each_comp_order(order) {
1285 for_each_card_rtds(card, rtd) {
1288 "ASoC: probe %s dai link %d late %d\n",
1289 card->name, rtd->num, order);
1291 /* probe all rtd connected DAIs in good order */
1292 ret = snd_soc_pcm_dai_probe(rtd, order);
1301 static void soc_remove_link_components(struct snd_soc_card *card)
1303 struct snd_soc_component *component;
1304 struct snd_soc_pcm_runtime *rtd;
1307 for_each_comp_order(order) {
1308 for_each_card_rtds(card, rtd) {
1309 for_each_rtd_components(rtd, i, component) {
1310 if (component->driver->remove_order != order)
1313 soc_remove_component(component, 1);
1319 static int soc_probe_link_components(struct snd_soc_card *card)
1321 struct snd_soc_component *component;
1322 struct snd_soc_pcm_runtime *rtd;
1325 for_each_comp_order(order) {
1326 for_each_card_rtds(card, rtd) {
1327 for_each_rtd_components(rtd, i, component) {
1328 if (component->driver->probe_order != order)
1331 ret = soc_probe_component(card, component);
1341 static void soc_unbind_aux_dev(struct snd_soc_card *card)
1343 struct snd_soc_component *component, *_component;
1345 for_each_card_auxs_safe(card, component, _component) {
1346 /* for snd_soc_component_init() */
1347 snd_soc_component_set_aux(component, NULL);
1348 list_del(&component->card_aux_list);
1352 static int soc_bind_aux_dev(struct snd_soc_card *card)
1354 struct snd_soc_component *component;
1355 struct snd_soc_aux_dev *aux;
1358 for_each_card_pre_auxs(card, i, aux) {
1359 /* codecs, usually analog devices */
1360 component = soc_find_component(&aux->dlc);
1362 return -EPROBE_DEFER;
1364 /* for snd_soc_component_init() */
1365 snd_soc_component_set_aux(component, aux);
1366 /* see for_each_card_auxs */
1367 list_add(&component->card_aux_list, &card->aux_comp_list);
1372 static int soc_probe_aux_devices(struct snd_soc_card *card)
1374 struct snd_soc_component *component;
1378 for_each_comp_order(order) {
1379 for_each_card_auxs(card, component) {
1380 if (component->driver->probe_order != order)
1383 ret = soc_probe_component(card, component);
1392 static void soc_remove_aux_devices(struct snd_soc_card *card)
1394 struct snd_soc_component *comp, *_comp;
1397 for_each_comp_order(order) {
1398 for_each_card_auxs_safe(card, comp, _comp) {
1399 if (comp->driver->remove_order == order)
1400 soc_remove_component(comp, 1);
1406 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1407 * @rtd: The runtime for which the DAI link format should be changed
1408 * @dai_fmt: The new DAI link format
1410 * This function updates the DAI link format for all DAIs connected to the DAI
1411 * link for the specified runtime.
1413 * Note: For setups with a static format set the dai_fmt field in the
1414 * corresponding snd_dai_link struct instead of using this function.
1416 * Returns 0 on success, otherwise a negative error code.
1418 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1419 unsigned int dai_fmt)
1421 struct snd_soc_dai *cpu_dai;
1422 struct snd_soc_dai *codec_dai;
1423 unsigned int inv_dai_fmt;
1427 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1428 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1429 if (ret != 0 && ret != -ENOTSUPP)
1434 * Flip the polarity for the "CPU" end of a CODEC<->CODEC link
1435 * the component which has non_legacy_dai_naming is Codec
1437 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1438 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1439 case SND_SOC_DAIFMT_CBM_CFM:
1440 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1442 case SND_SOC_DAIFMT_CBM_CFS:
1443 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1445 case SND_SOC_DAIFMT_CBS_CFM:
1446 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1448 case SND_SOC_DAIFMT_CBS_CFS:
1449 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1452 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1453 unsigned int fmt = dai_fmt;
1455 if (cpu_dai->component->driver->non_legacy_dai_naming)
1458 ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
1459 if (ret != 0 && ret != -ENOTSUPP)
1465 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1469 * If a DMI filed contain strings in this blacklist (e.g.
1470 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
1471 * as invalid and dropped when setting the card long name from DMI info.
1473 static const char * const dmi_blacklist[] = {
1474 "To be filled by OEM",
1477 "Board Manufacturer",
1478 "Board Vendor Name",
1479 "Board Product Name",
1480 NULL, /* terminator */
1484 * Trim special characters, and replace '-' with '_' since '-' is used to
1485 * separate different DMI fields in the card long name. Only number and
1486 * alphabet characters and a few separator characters are kept.
1488 static void cleanup_dmi_name(char *name)
1492 for (i = 0; name[i]; i++) {
1493 if (isalnum(name[i]) || (name[i] == '.')
1494 || (name[i] == '_'))
1495 name[j++] = name[i];
1496 else if (name[i] == '-')
1504 * Check if a DMI field is valid, i.e. not containing any string
1505 * in the black list.
1507 static int is_dmi_valid(const char *field)
1511 while (dmi_blacklist[i]) {
1512 if (strstr(field, dmi_blacklist[i]))
1521 * Append a string to card->dmi_longname with character cleanups.
1523 static void append_dmi_string(struct snd_soc_card *card, const char *str)
1525 char *dst = card->dmi_longname;
1526 size_t dst_len = sizeof(card->dmi_longname);
1530 snprintf(dst + len, dst_len - len, "-%s", str);
1532 len++; /* skip the separator "-" */
1534 cleanup_dmi_name(dst + len);
1538 * snd_soc_set_dmi_name() - Register DMI names to card
1539 * @card: The card to register DMI names
1540 * @flavour: The flavour "differentiator" for the card amongst its peers.
1542 * An Intel machine driver may be used by many different devices but are
1543 * difficult for userspace to differentiate, since machine drivers ususally
1544 * use their own name as the card short name and leave the card long name
1545 * blank. To differentiate such devices and fix bugs due to lack of
1546 * device-specific configurations, this function allows DMI info to be used
1547 * as the sound card long name, in the format of
1548 * "vendor-product-version-board"
1549 * (Character '-' is used to separate different DMI fields here).
1550 * This will help the user space to load the device-specific Use Case Manager
1551 * (UCM) configurations for the card.
1553 * Possible card long names may be:
1554 * DellInc.-XPS139343-01-0310JH
1555 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1556 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1558 * This function also supports flavoring the card longname to provide
1559 * the extra differentiation, like "vendor-product-version-board-flavor".
1561 * We only keep number and alphabet characters and a few separator characters
1562 * in the card long name since UCM in the user space uses the card long names
1563 * as card configuration directory names and AudoConf cannot support special
1564 * charactors like SPACE.
1566 * Returns 0 on success, otherwise a negative error code.
1568 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1570 const char *vendor, *product, *product_version, *board;
1572 if (card->long_name)
1573 return 0; /* long name already set by driver or from DMI */
1578 /* make up dmi long name as: vendor-product-version-board */
1579 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1580 if (!vendor || !is_dmi_valid(vendor)) {
1581 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1585 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1586 cleanup_dmi_name(card->dmi_longname);
1588 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1589 if (product && is_dmi_valid(product)) {
1590 append_dmi_string(card, product);
1593 * some vendors like Lenovo may only put a self-explanatory
1594 * name in the product version field
1596 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1597 if (product_version && is_dmi_valid(product_version))
1598 append_dmi_string(card, product_version);
1601 board = dmi_get_system_info(DMI_BOARD_NAME);
1602 if (board && is_dmi_valid(board)) {
1603 if (!product || strcasecmp(board, product))
1604 append_dmi_string(card, board);
1605 } else if (!product) {
1606 /* fall back to using legacy name */
1607 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1611 /* Add flavour to dmi long name */
1613 append_dmi_string(card, flavour);
1615 /* set the card long name */
1616 card->long_name = card->dmi_longname;
1620 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1621 #endif /* CONFIG_DMI */
1623 static void soc_check_tplg_fes(struct snd_soc_card *card)
1625 struct snd_soc_component *component;
1626 const struct snd_soc_component_driver *comp_drv;
1627 struct snd_soc_dai_link *dai_link;
1630 for_each_component(component) {
1632 /* does this component override BEs ? */
1633 if (!component->driver->ignore_machine)
1636 /* for this machine ? */
1637 if (!strcmp(component->driver->ignore_machine,
1638 card->dev->driver->name))
1640 if (strcmp(component->driver->ignore_machine,
1641 dev_name(card->dev)))
1644 /* machine matches, so override the rtd data */
1645 for_each_card_prelinks(card, i, dai_link) {
1647 /* ignore this FE */
1648 if (dai_link->dynamic) {
1649 dai_link->ignore = true;
1653 dev_dbg(card->dev, "info: override BE DAI link %s\n",
1654 card->dai_link[i].name);
1656 /* override platform component */
1657 if (!dai_link->platforms) {
1658 dev_err(card->dev, "init platform error");
1662 if (component->dev->of_node)
1663 dai_link->platforms->of_node = component->dev->of_node;
1665 dai_link->platforms->name = component->name;
1667 /* convert non BE into BE */
1668 if (!dai_link->no_pcm) {
1669 dai_link->no_pcm = 1;
1671 if (dai_link->dpcm_playback)
1673 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_playback=1\n",
1675 if (dai_link->dpcm_capture)
1677 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_capture=1\n",
1680 /* convert normal link into DPCM one */
1681 if (!(dai_link->dpcm_playback ||
1682 dai_link->dpcm_capture)) {
1683 dai_link->dpcm_playback = !dai_link->capture_only;
1684 dai_link->dpcm_capture = !dai_link->playback_only;
1689 * override any BE fixups
1691 * snd_soc_link_be_hw_params_fixup()
1693 dai_link->be_hw_params_fixup =
1694 component->driver->be_hw_params_fixup;
1697 * most BE links don't set stream name, so set it to
1698 * dai link name if it's NULL to help bind widgets.
1700 if (!dai_link->stream_name)
1701 dai_link->stream_name = dai_link->name;
1704 /* Inform userspace we are using alternate topology */
1705 if (component->driver->topology_name_prefix) {
1707 /* topology shortname created? */
1708 if (!card->topology_shortname_created) {
1709 comp_drv = component->driver;
1711 snprintf(card->topology_shortname, 32, "%s-%s",
1712 comp_drv->topology_name_prefix,
1714 card->topology_shortname_created = true;
1717 /* use topology shortname */
1718 card->name = card->topology_shortname;
1723 #define soc_setup_card_name(name, name1, name2, norm) \
1724 __soc_setup_card_name(name, sizeof(name), name1, name2, norm)
1725 static void __soc_setup_card_name(char *name, int len,
1726 const char *name1, const char *name2,
1731 snprintf(name, len, "%s", name1 ? name1 : name2);
1737 * Name normalization
1739 * The driver name is somewhat special, as it's used as a key for
1740 * searches in the user-space.
1743 * "abcd??efg" -> "abcd__efg"
1745 for (i = 0; i < len; i++) {
1752 if (!isalnum(name[i]))
1759 static void soc_cleanup_card_resources(struct snd_soc_card *card)
1761 struct snd_soc_pcm_runtime *rtd, *n;
1764 snd_card_disconnect_sync(card->snd_card);
1766 snd_soc_dapm_shutdown(card);
1768 /* remove and free each DAI */
1769 soc_remove_link_dais(card);
1770 soc_remove_link_components(card);
1772 for_each_card_rtds_safe(card, rtd, n)
1773 snd_soc_remove_pcm_runtime(card, rtd);
1775 /* remove auxiliary devices */
1776 soc_remove_aux_devices(card);
1777 soc_unbind_aux_dev(card);
1779 snd_soc_dapm_free(&card->dapm);
1780 soc_cleanup_card_debugfs(card);
1782 /* remove the card */
1783 snd_soc_card_remove(card);
1785 if (card->snd_card) {
1786 snd_card_free(card->snd_card);
1787 card->snd_card = NULL;
1791 static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
1793 if (card->instantiated) {
1794 card->instantiated = false;
1795 snd_soc_flush_all_delayed_work(card);
1797 soc_cleanup_card_resources(card);
1799 list_add(&card->list, &unbind_card_list);
1802 list_del(&card->list);
1806 static int snd_soc_bind_card(struct snd_soc_card *card)
1808 struct snd_soc_pcm_runtime *rtd;
1809 struct snd_soc_component *component;
1810 struct snd_soc_dai_link *dai_link;
1813 mutex_lock(&client_mutex);
1814 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1816 snd_soc_dapm_init(&card->dapm, card, NULL);
1818 /* check whether any platform is ignore machine FE and using topology */
1819 soc_check_tplg_fes(card);
1821 /* bind aux_devs too */
1822 ret = soc_bind_aux_dev(card);
1826 /* add predefined DAI links to the list */
1828 for_each_card_prelinks(card, i, dai_link) {
1829 ret = snd_soc_add_pcm_runtime(card, dai_link);
1834 /* card bind complete so register a sound card */
1835 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1836 card->owner, 0, &card->snd_card);
1839 "ASoC: can't create sound card for card %s: %d\n",
1844 soc_init_card_debugfs(card);
1846 soc_resume_init(card);
1848 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1849 card->num_dapm_widgets);
1853 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
1854 card->num_of_dapm_widgets);
1858 /* initialise the sound card only once */
1859 ret = snd_soc_card_probe(card);
1863 /* probe all components used by DAI links on this card */
1864 ret = soc_probe_link_components(card);
1867 "ASoC: failed to instantiate card %d\n", ret);
1871 /* probe auxiliary components */
1872 ret = soc_probe_aux_devices(card);
1875 "ASoC: failed to probe aux component %d\n", ret);
1879 /* probe all DAI links on this card */
1880 ret = soc_probe_link_dais(card);
1883 "ASoC: failed to instantiate card %d\n", ret);
1887 for_each_card_rtds(card, rtd) {
1888 ret = soc_init_pcm_runtime(card, rtd);
1893 snd_soc_dapm_link_dai_widgets(card);
1894 snd_soc_dapm_connect_dai_link_widgets(card);
1896 ret = snd_soc_add_card_controls(card, card->controls,
1897 card->num_controls);
1901 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1902 card->num_dapm_routes);
1904 if (card->disable_route_checks) {
1906 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1910 "%s: snd_soc_dapm_add_routes failed: %d\n",
1916 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
1917 card->num_of_dapm_routes);
1921 /* try to set some sane longname if DMI is available */
1922 snd_soc_set_dmi_name(card, NULL);
1924 soc_setup_card_name(card->snd_card->shortname,
1925 card->name, NULL, 0);
1926 soc_setup_card_name(card->snd_card->longname,
1927 card->long_name, card->name, 0);
1928 soc_setup_card_name(card->snd_card->driver,
1929 card->driver_name, card->name, 1);
1931 if (card->components) {
1932 /* the current implementation of snd_component_add() accepts */
1933 /* multiple components in the string separated by space, */
1934 /* but the string collision (identical string) check might */
1935 /* not work correctly */
1936 ret = snd_component_add(card->snd_card, card->components);
1938 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
1944 ret = snd_soc_card_late_probe(card);
1948 snd_soc_dapm_new_widgets(card);
1950 ret = snd_card_register(card->snd_card);
1952 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1957 card->instantiated = 1;
1958 dapm_mark_endpoints_dirty(card);
1959 snd_soc_dapm_sync(&card->dapm);
1961 /* deactivate pins to sleep state */
1962 for_each_card_components(card, component)
1963 if (!snd_soc_component_active(component))
1964 pinctrl_pm_select_sleep_state(component->dev);
1968 soc_cleanup_card_resources(card);
1970 mutex_unlock(&card->mutex);
1971 mutex_unlock(&client_mutex);
1976 /* probes a new socdev */
1977 static int soc_probe(struct platform_device *pdev)
1979 struct snd_soc_card *card = platform_get_drvdata(pdev);
1982 * no card, so machine driver should be registering card
1983 * we should not be here in that case so ret error
1988 dev_warn(&pdev->dev,
1989 "ASoC: machine %s should use snd_soc_register_card()\n",
1992 /* Bodge while we unpick instantiation */
1993 card->dev = &pdev->dev;
1995 return devm_snd_soc_register_card(&pdev->dev, card);
1998 int snd_soc_poweroff(struct device *dev)
2000 struct snd_soc_card *card = dev_get_drvdata(dev);
2001 struct snd_soc_component *component;
2003 if (!card->instantiated)
2007 * Flush out pmdown_time work - we actually do want to run it
2008 * now, we're shutting down so no imminent restart.
2010 snd_soc_flush_all_delayed_work(card);
2012 snd_soc_dapm_shutdown(card);
2014 /* deactivate pins to sleep state */
2015 for_each_card_components(card, component)
2016 pinctrl_pm_select_sleep_state(component->dev);
2020 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2022 const struct dev_pm_ops snd_soc_pm_ops = {
2023 .suspend = snd_soc_suspend,
2024 .resume = snd_soc_resume,
2025 .freeze = snd_soc_suspend,
2026 .thaw = snd_soc_resume,
2027 .poweroff = snd_soc_poweroff,
2028 .restore = snd_soc_resume,
2030 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2032 /* ASoC platform driver */
2033 static struct platform_driver soc_driver = {
2035 .name = "soc-audio",
2036 .pm = &snd_soc_pm_ops,
2042 * snd_soc_cnew - create new control
2043 * @_template: control template
2044 * @data: control private data
2045 * @long_name: control long name
2046 * @prefix: control name prefix
2048 * Create a new mixer control from a template control.
2050 * Returns 0 for success, else error.
2052 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2053 void *data, const char *long_name,
2056 struct snd_kcontrol_new template;
2057 struct snd_kcontrol *kcontrol;
2060 memcpy(&template, _template, sizeof(template));
2064 long_name = template.name;
2067 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2071 template.name = name;
2073 template.name = long_name;
2076 kcontrol = snd_ctl_new1(&template, data);
2082 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2084 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2085 const struct snd_kcontrol_new *controls, int num_controls,
2086 const char *prefix, void *data)
2090 for (i = 0; i < num_controls; i++) {
2091 const struct snd_kcontrol_new *control = &controls[i];
2093 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2094 control->name, prefix));
2096 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2097 control->name, err);
2106 * snd_soc_add_component_controls - Add an array of controls to a component.
2108 * @component: Component to add controls to
2109 * @controls: Array of controls to add
2110 * @num_controls: Number of elements in the array
2112 * Return: 0 for success, else error.
2114 int snd_soc_add_component_controls(struct snd_soc_component *component,
2115 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2117 struct snd_card *card = component->card->snd_card;
2119 return snd_soc_add_controls(card, component->dev, controls,
2120 num_controls, component->name_prefix, component);
2122 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2125 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2126 * Convenience function to add a list of controls.
2128 * @soc_card: SoC card to add controls to
2129 * @controls: array of controls to add
2130 * @num_controls: number of elements in the array
2132 * Return 0 for success, else error.
2134 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2135 const struct snd_kcontrol_new *controls, int num_controls)
2137 struct snd_card *card = soc_card->snd_card;
2139 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2142 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2145 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2146 * Convienience function to add a list of controls.
2148 * @dai: DAI to add controls to
2149 * @controls: array of controls to add
2150 * @num_controls: number of elements in the array
2152 * Return 0 for success, else error.
2154 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2155 const struct snd_kcontrol_new *controls, int num_controls)
2157 struct snd_card *card = dai->component->card->snd_card;
2159 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2162 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2165 * snd_soc_register_card - Register a card with the ASoC core
2167 * @card: Card to register
2170 int snd_soc_register_card(struct snd_soc_card *card)
2172 if (!card->name || !card->dev)
2175 dev_set_drvdata(card->dev, card);
2177 INIT_LIST_HEAD(&card->widgets);
2178 INIT_LIST_HEAD(&card->paths);
2179 INIT_LIST_HEAD(&card->dapm_list);
2180 INIT_LIST_HEAD(&card->aux_comp_list);
2181 INIT_LIST_HEAD(&card->component_dev_list);
2182 INIT_LIST_HEAD(&card->list);
2183 INIT_LIST_HEAD(&card->rtd_list);
2184 INIT_LIST_HEAD(&card->dapm_dirty);
2185 INIT_LIST_HEAD(&card->dobj_list);
2187 card->instantiated = 0;
2188 mutex_init(&card->mutex);
2189 mutex_init(&card->dapm_mutex);
2190 mutex_init(&card->pcm_mutex);
2191 spin_lock_init(&card->dpcm_lock);
2193 return snd_soc_bind_card(card);
2195 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2198 * snd_soc_unregister_card - Unregister a card with the ASoC core
2200 * @card: Card to unregister
2203 int snd_soc_unregister_card(struct snd_soc_card *card)
2205 mutex_lock(&client_mutex);
2206 snd_soc_unbind_card(card, true);
2207 mutex_unlock(&client_mutex);
2208 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2212 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2215 * Simplify DAI link configuration by removing ".-1" from device names
2216 * and sanitizing names.
2218 static char *fmt_single_name(struct device *dev, int *id)
2220 const char *devname = dev_name(dev);
2222 unsigned int id1, id2;
2224 if (devname == NULL)
2227 name = devm_kstrdup(dev, devname, GFP_KERNEL);
2229 /* are we a "%s.%d" name (platform and SPI components) */
2230 found = strstr(name, dev->driver->name);
2233 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2235 /* discard ID from name if ID == -1 */
2237 found[strlen(dev->driver->name)] = '\0';
2240 /* I2C component devices are named "bus-addr" */
2241 } else if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2243 /* create unique ID number from I2C addr and bus */
2244 *id = ((id1 & 0xffff) << 16) + id2;
2246 devm_kfree(dev, name);
2248 /* sanitize component name for DAI link creation */
2249 name = devm_kasprintf(dev, GFP_KERNEL, "%s.%s", dev->driver->name, devname);
2258 * Simplify DAI link naming for single devices with multiple DAIs by removing
2259 * any ".-1" and using the DAI name (instead of device name).
2261 static inline char *fmt_multiple_name(struct device *dev,
2262 struct snd_soc_dai_driver *dai_drv)
2264 if (dai_drv->name == NULL) {
2266 "ASoC: error - multiple DAI %s registered with no name\n",
2271 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2274 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2276 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2277 list_del(&dai->list);
2279 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2282 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2284 * @component: The component the DAIs are registered for
2285 * @dai_drv: DAI driver to use for the DAI
2286 * @legacy_dai_naming: if %true, use legacy single-name format;
2287 * if %false, use multiple-name format;
2289 * Topology can use this API to register DAIs when probing a component.
2290 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2291 * will be freed in the component cleanup.
2293 struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2294 struct snd_soc_dai_driver *dai_drv,
2295 bool legacy_dai_naming)
2297 struct device *dev = component->dev;
2298 struct snd_soc_dai *dai;
2300 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2302 lockdep_assert_held(&client_mutex);
2304 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2309 * Back in the old days when we still had component-less DAIs,
2310 * instead of having a static name, component-less DAIs would
2311 * inherit the name of the parent device so it is possible to
2312 * register multiple instances of the DAI. We still need to keep
2313 * the same naming style even though those DAIs are not
2314 * component-less anymore.
2316 if (legacy_dai_naming &&
2317 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2318 dai->name = fmt_single_name(dev, &dai->id);
2320 dai->name = fmt_multiple_name(dev, dai_drv);
2322 dai->id = dai_drv->id;
2324 dai->id = component->num_dai;
2329 dai->component = component;
2331 dai->driver = dai_drv;
2333 /* see for_each_component_dais */
2334 list_add_tail(&dai->list, &component->dai_list);
2335 component->num_dai++;
2337 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2342 * snd_soc_unregister_dais - Unregister DAIs from the ASoC core
2344 * @component: The component for which the DAIs should be unregistered
2346 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2348 struct snd_soc_dai *dai, *_dai;
2350 for_each_component_dais_safe(component, dai, _dai)
2351 snd_soc_unregister_dai(dai);
2355 * snd_soc_register_dais - Register a DAI with the ASoC core
2357 * @component: The component the DAIs are registered for
2358 * @dai_drv: DAI driver to use for the DAIs
2359 * @count: Number of DAIs
2361 static int snd_soc_register_dais(struct snd_soc_component *component,
2362 struct snd_soc_dai_driver *dai_drv,
2365 struct snd_soc_dai *dai;
2369 for (i = 0; i < count; i++) {
2370 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2371 !component->driver->non_legacy_dai_naming);
2381 snd_soc_unregister_dais(component);
2386 #define ENDIANNESS_MAP(name) \
2387 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2388 static u64 endianness_format_map[] = {
2389 ENDIANNESS_MAP(S16_),
2390 ENDIANNESS_MAP(U16_),
2391 ENDIANNESS_MAP(S24_),
2392 ENDIANNESS_MAP(U24_),
2393 ENDIANNESS_MAP(S32_),
2394 ENDIANNESS_MAP(U32_),
2395 ENDIANNESS_MAP(S24_3),
2396 ENDIANNESS_MAP(U24_3),
2397 ENDIANNESS_MAP(S20_3),
2398 ENDIANNESS_MAP(U20_3),
2399 ENDIANNESS_MAP(S18_3),
2400 ENDIANNESS_MAP(U18_3),
2401 ENDIANNESS_MAP(FLOAT_),
2402 ENDIANNESS_MAP(FLOAT64_),
2403 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2407 * Fix up the DAI formats for endianness: codecs don't actually see
2408 * the endianness of the data but we're using the CPU format
2409 * definitions which do need to include endianness so we ensure that
2410 * codec DAIs always have both big and little endian variants set.
2412 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2416 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2417 if (stream->formats & endianness_format_map[i])
2418 stream->formats |= endianness_format_map[i];
2421 static void snd_soc_try_rebind_card(void)
2423 struct snd_soc_card *card, *c;
2425 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2426 if (!snd_soc_bind_card(card))
2427 list_del(&card->list);
2430 static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2432 struct snd_soc_card *card = component->card;
2434 snd_soc_unregister_dais(component);
2437 snd_soc_unbind_card(card, false);
2439 list_del(&component->list);
2442 int snd_soc_component_initialize(struct snd_soc_component *component,
2443 const struct snd_soc_component_driver *driver,
2446 INIT_LIST_HEAD(&component->dai_list);
2447 INIT_LIST_HEAD(&component->dobj_list);
2448 INIT_LIST_HEAD(&component->card_list);
2449 mutex_init(&component->io_mutex);
2451 component->name = fmt_single_name(dev, &component->id);
2452 if (!component->name) {
2453 dev_err(dev, "ASoC: Failed to allocate name\n");
2457 component->dev = dev;
2458 component->driver = driver;
2462 EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
2464 int snd_soc_add_component(struct snd_soc_component *component,
2465 struct snd_soc_dai_driver *dai_drv,
2471 mutex_lock(&client_mutex);
2473 if (component->driver->endianness) {
2474 for (i = 0; i < num_dai; i++) {
2475 convert_endianness_formats(&dai_drv[i].playback);
2476 convert_endianness_formats(&dai_drv[i].capture);
2480 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2482 dev_err(component->dev, "ASoC: Failed to register DAIs: %d\n",
2487 if (!component->driver->write && !component->driver->read) {
2488 if (!component->regmap)
2489 component->regmap = dev_get_regmap(component->dev,
2491 if (component->regmap)
2492 snd_soc_component_setup_regmap(component);
2495 /* see for_each_component */
2496 list_add(&component->list, &component_list);
2500 snd_soc_del_component_unlocked(component);
2502 mutex_unlock(&client_mutex);
2505 snd_soc_try_rebind_card();
2509 EXPORT_SYMBOL_GPL(snd_soc_add_component);
2511 int snd_soc_register_component(struct device *dev,
2512 const struct snd_soc_component_driver *component_driver,
2513 struct snd_soc_dai_driver *dai_drv,
2516 struct snd_soc_component *component;
2519 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2523 ret = snd_soc_component_initialize(component, component_driver, dev);
2527 return snd_soc_add_component(component, dai_drv, num_dai);
2529 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2532 * snd_soc_unregister_component_by_driver - Unregister component using a given driver
2533 * from the ASoC core
2535 * @dev: The device to unregister
2536 * @component_driver: The component driver to unregister
2538 void snd_soc_unregister_component_by_driver(struct device *dev,
2539 const struct snd_soc_component_driver *component_driver)
2541 struct snd_soc_component *component;
2543 if (!component_driver)
2546 mutex_lock(&client_mutex);
2547 component = snd_soc_lookup_component_nolocked(dev, component_driver->name);
2551 snd_soc_del_component_unlocked(component);
2554 mutex_unlock(&client_mutex);
2556 EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
2559 * snd_soc_unregister_component - Unregister all related component
2560 * from the ASoC core
2562 * @dev: The device to unregister
2564 void snd_soc_unregister_component(struct device *dev)
2566 struct snd_soc_component *component;
2568 mutex_lock(&client_mutex);
2570 component = snd_soc_lookup_component_nolocked(dev, NULL);
2574 snd_soc_del_component_unlocked(component);
2576 mutex_unlock(&client_mutex);
2578 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2580 /* Retrieve a card's name from device tree */
2581 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2582 const char *propname)
2584 struct device_node *np;
2588 pr_err("card->dev is not set before calling %s\n", __func__);
2592 np = card->dev->of_node;
2594 ret = of_property_read_string_index(np, propname, 0, &card->name);
2596 * EINVAL means the property does not exist. This is fine providing
2597 * card->name was previously set, which is checked later in
2598 * snd_soc_register_card.
2600 if (ret < 0 && ret != -EINVAL) {
2602 "ASoC: Property '%s' could not be read: %d\n",
2609 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2611 static const struct snd_soc_dapm_widget simple_widgets[] = {
2612 SND_SOC_DAPM_MIC("Microphone", NULL),
2613 SND_SOC_DAPM_LINE("Line", NULL),
2614 SND_SOC_DAPM_HP("Headphone", NULL),
2615 SND_SOC_DAPM_SPK("Speaker", NULL),
2618 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2619 const char *propname)
2621 struct device_node *np = card->dev->of_node;
2622 struct snd_soc_dapm_widget *widgets;
2623 const char *template, *wname;
2624 int i, j, num_widgets, ret;
2626 num_widgets = of_property_count_strings(np, propname);
2627 if (num_widgets < 0) {
2629 "ASoC: Property '%s' does not exist\n", propname);
2632 if (num_widgets & 1) {
2634 "ASoC: Property '%s' length is not even\n", propname);
2640 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2645 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2649 "ASoC: Could not allocate memory for widgets\n");
2653 for (i = 0; i < num_widgets; i++) {
2654 ret = of_property_read_string_index(np, propname,
2658 "ASoC: Property '%s' index %d read error:%d\n",
2659 propname, 2 * i, ret);
2663 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
2664 if (!strncmp(template, simple_widgets[j].name,
2665 strlen(simple_widgets[j].name))) {
2666 widgets[i] = simple_widgets[j];
2671 if (j >= ARRAY_SIZE(simple_widgets)) {
2673 "ASoC: DAPM widget '%s' is not supported\n",
2678 ret = of_property_read_string_index(np, propname,
2683 "ASoC: Property '%s' index %d read error:%d\n",
2684 propname, (2 * i) + 1, ret);
2688 widgets[i].name = wname;
2691 card->of_dapm_widgets = widgets;
2692 card->num_of_dapm_widgets = num_widgets;
2696 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
2698 int snd_soc_of_get_slot_mask(struct device_node *np,
2699 const char *prop_name,
2703 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
2709 for (i = 0; i < val; i++)
2710 if (be32_to_cpup(&of_slot_mask[i]))
2715 EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
2717 int snd_soc_of_parse_tdm_slot(struct device_node *np,
2718 unsigned int *tx_mask,
2719 unsigned int *rx_mask,
2720 unsigned int *slots,
2721 unsigned int *slot_width)
2727 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
2729 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
2731 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
2732 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
2740 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
2741 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
2751 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
2753 void snd_soc_of_parse_node_prefix(struct device_node *np,
2754 struct snd_soc_codec_conf *codec_conf,
2755 struct device_node *of_node,
2756 const char *propname)
2761 ret = of_property_read_string(np, propname, &str);
2763 /* no prefix is not error */
2767 codec_conf->dlc.of_node = of_node;
2768 codec_conf->name_prefix = str;
2770 EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
2772 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
2773 const char *propname)
2775 struct device_node *np = card->dev->of_node;
2777 struct snd_soc_dapm_route *routes;
2780 num_routes = of_property_count_strings(np, propname);
2781 if (num_routes < 0 || num_routes & 1) {
2783 "ASoC: Property '%s' does not exist or its length is not even\n",
2789 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
2793 "ASoC: Could not allocate DAPM route table\n");
2797 for (i = 0; i < num_routes; i++) {
2798 ret = of_property_read_string_index(np, propname,
2799 2 * i, &routes[i].sink);
2802 "ASoC: Property '%s' index %d could not be read: %d\n",
2803 propname, 2 * i, ret);
2806 ret = of_property_read_string_index(np, propname,
2807 (2 * i) + 1, &routes[i].source);
2810 "ASoC: Property '%s' index %d could not be read: %d\n",
2811 propname, (2 * i) + 1, ret);
2816 card->num_of_dapm_routes = num_routes;
2817 card->of_dapm_routes = routes;
2821 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
2823 int snd_soc_of_parse_aux_devs(struct snd_soc_card *card, const char *propname)
2825 struct device_node *node = card->dev->of_node;
2826 struct snd_soc_aux_dev *aux;
2829 num = of_count_phandle_with_args(node, propname, NULL);
2830 if (num == -ENOENT) {
2832 } else if (num < 0) {
2833 dev_err(card->dev, "ASOC: Property '%s' could not be read: %d\n",
2838 aux = devm_kcalloc(card->dev, num, sizeof(*aux), GFP_KERNEL);
2841 card->aux_dev = aux;
2842 card->num_aux_devs = num;
2844 for_each_card_pre_auxs(card, i, aux) {
2845 aux->dlc.of_node = of_parse_phandle(node, propname, i);
2846 if (!aux->dlc.of_node)
2852 EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs);
2854 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
2856 struct device_node **bitclkmaster,
2857 struct device_node **framemaster)
2861 unsigned int format = 0;
2867 } of_fmt_table[] = {
2868 { "i2s", SND_SOC_DAIFMT_I2S },
2869 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
2870 { "left_j", SND_SOC_DAIFMT_LEFT_J },
2871 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
2872 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
2873 { "ac97", SND_SOC_DAIFMT_AC97 },
2874 { "pdm", SND_SOC_DAIFMT_PDM},
2875 { "msb", SND_SOC_DAIFMT_MSB },
2876 { "lsb", SND_SOC_DAIFMT_LSB },
2883 * check "dai-format = xxx"
2884 * or "[prefix]format = xxx"
2885 * SND_SOC_DAIFMT_FORMAT_MASK area
2887 ret = of_property_read_string(np, "dai-format", &str);
2889 snprintf(prop, sizeof(prop), "%sformat", prefix);
2890 ret = of_property_read_string(np, prop, &str);
2893 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
2894 if (strcmp(str, of_fmt_table[i].name) == 0) {
2895 format |= of_fmt_table[i].val;
2902 * check "[prefix]continuous-clock"
2903 * SND_SOC_DAIFMT_CLOCK_MASK area
2905 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
2906 if (of_property_read_bool(np, prop))
2907 format |= SND_SOC_DAIFMT_CONT;
2909 format |= SND_SOC_DAIFMT_GATED;
2912 * check "[prefix]bitclock-inversion"
2913 * check "[prefix]frame-inversion"
2914 * SND_SOC_DAIFMT_INV_MASK area
2916 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
2917 bit = !!of_get_property(np, prop, NULL);
2919 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
2920 frame = !!of_get_property(np, prop, NULL);
2922 switch ((bit << 4) + frame) {
2924 format |= SND_SOC_DAIFMT_IB_IF;
2927 format |= SND_SOC_DAIFMT_IB_NF;
2930 format |= SND_SOC_DAIFMT_NB_IF;
2933 /* SND_SOC_DAIFMT_NB_NF is default */
2938 * check "[prefix]bitclock-master"
2939 * check "[prefix]frame-master"
2940 * SND_SOC_DAIFMT_MASTER_MASK area
2942 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
2943 bit = !!of_get_property(np, prop, NULL);
2944 if (bit && bitclkmaster)
2945 *bitclkmaster = of_parse_phandle(np, prop, 0);
2947 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
2948 frame = !!of_get_property(np, prop, NULL);
2949 if (frame && framemaster)
2950 *framemaster = of_parse_phandle(np, prop, 0);
2952 switch ((bit << 4) + frame) {
2954 format |= SND_SOC_DAIFMT_CBM_CFM;
2957 format |= SND_SOC_DAIFMT_CBM_CFS;
2960 format |= SND_SOC_DAIFMT_CBS_CFM;
2963 format |= SND_SOC_DAIFMT_CBS_CFS;
2969 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
2971 int snd_soc_get_dai_id(struct device_node *ep)
2973 struct snd_soc_component *component;
2974 struct snd_soc_dai_link_component dlc;
2977 dlc.of_node = of_graph_get_port_parent(ep);
2980 * For example HDMI case, HDMI has video/sound port,
2981 * but ALSA SoC needs sound port number only.
2982 * Thus counting HDMI DT port/endpoint doesn't work.
2983 * Then, it should have .of_xlate_dai_id
2986 mutex_lock(&client_mutex);
2987 component = soc_find_component(&dlc);
2989 ret = snd_soc_component_of_xlate_dai_id(component, ep);
2990 mutex_unlock(&client_mutex);
2992 of_node_put(dlc.of_node);
2996 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
2998 int snd_soc_get_dai_name(const struct of_phandle_args *args,
2999 const char **dai_name)
3001 struct snd_soc_component *pos;
3002 struct device_node *component_of_node;
3003 int ret = -EPROBE_DEFER;
3005 mutex_lock(&client_mutex);
3006 for_each_component(pos) {
3007 component_of_node = soc_component_to_node(pos);
3009 if (component_of_node != args->np)
3012 ret = snd_soc_component_of_xlate_dai_name(pos, args, dai_name);
3013 if (ret == -ENOTSUPP) {
3014 struct snd_soc_dai *dai;
3017 switch (args->args_count) {
3019 id = 0; /* same as dai_drv[0] */
3029 if (id < 0 || id >= pos->num_dai) {
3036 /* find target DAI */
3037 for_each_component_dais(pos, dai) {
3043 *dai_name = dai->driver->name;
3045 *dai_name = pos->name;
3048 * if another error than ENOTSUPP is returned go on and
3049 * check if another component is provided with the same
3050 * node. This may happen if a device provides several
3058 mutex_unlock(&client_mutex);
3061 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3063 int snd_soc_of_get_dai_name(struct device_node *of_node,
3064 const char **dai_name)
3066 struct of_phandle_args args;
3069 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3070 "#sound-dai-cells", 0, &args);
3074 ret = snd_soc_get_dai_name(&args, dai_name);
3076 of_node_put(args.np);
3080 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3083 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3084 * @dai_link: DAI link
3086 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3088 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3090 struct snd_soc_dai_link_component *component;
3093 for_each_link_codecs(dai_link, index, component) {
3094 if (!component->of_node)
3096 of_node_put(component->of_node);
3097 component->of_node = NULL;
3100 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3103 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3105 * @of_node: Device node
3106 * @dai_link: DAI link
3108 * Builds an array of CODEC DAI components from the DAI link property
3110 * The array is set in the DAI link and the number of DAIs is set accordingly.
3111 * The device nodes in the array (of_node) must be dereferenced by calling
3112 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3114 * Returns 0 for success
3116 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3117 struct device_node *of_node,
3118 struct snd_soc_dai_link *dai_link)
3120 struct of_phandle_args args;
3121 struct snd_soc_dai_link_component *component;
3123 int index, num_codecs, ret;
3125 /* Count the number of CODECs */
3127 num_codecs = of_count_phandle_with_args(of_node, name,
3128 "#sound-dai-cells");
3129 if (num_codecs <= 0) {
3130 if (num_codecs == -ENOENT)
3131 dev_err(dev, "No 'sound-dai' property\n");
3133 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3136 component = devm_kcalloc(dev,
3137 num_codecs, sizeof(*component),
3141 dai_link->codecs = component;
3142 dai_link->num_codecs = num_codecs;
3144 /* Parse the list */
3145 for_each_link_codecs(dai_link, index, component) {
3146 ret = of_parse_phandle_with_args(of_node, name,
3151 component->of_node = args.np;
3152 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3158 snd_soc_of_put_dai_link_codecs(dai_link);
3159 dai_link->codecs = NULL;
3160 dai_link->num_codecs = 0;
3163 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3165 static int __init snd_soc_init(void)
3167 snd_soc_debugfs_init();
3168 snd_soc_util_init();
3170 return platform_driver_register(&soc_driver);
3172 module_init(snd_soc_init);
3174 static void __exit snd_soc_exit(void)
3176 snd_soc_util_exit();
3177 snd_soc_debugfs_exit();
3179 platform_driver_unregister(&soc_driver);
3181 module_exit(snd_soc_exit);
3183 /* Module information */
3184 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3185 MODULE_DESCRIPTION("ALSA SoC Core");
3186 MODULE_LICENSE("GPL");
3187 MODULE_ALIAS("platform:soc-audio");