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 <sound/core.h>
35 #include <sound/jack.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/initval.h>
43 #define CREATE_TRACE_POINTS
44 #include <trace/events/asoc.h>
48 #ifdef CONFIG_DEBUG_FS
49 struct dentry *snd_soc_debugfs_root;
50 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
53 static DEFINE_MUTEX(client_mutex);
54 static LIST_HEAD(component_list);
55 static LIST_HEAD(unbind_card_list);
57 #define for_each_component(component) \
58 list_for_each_entry(component, &component_list, list)
61 * This is used if driver don't need to have CPU/Codec/Platform
64 struct snd_soc_dai_link_component null_dailink_component[0];
65 EXPORT_SYMBOL_GPL(null_dailink_component);
68 * This is a timeout to do a DAPM powerdown after a stream is closed().
69 * It can be used to eliminate pops between different playback streams, e.g.
70 * between two audio tracks.
72 static int pmdown_time = 5000;
73 module_param(pmdown_time, int, 0);
74 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
78 * If a DMI filed contain strings in this blacklist (e.g.
79 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
80 * as invalid and dropped when setting the card long name from DMI info.
82 static const char * const dmi_blacklist[] = {
83 "To be filled by OEM",
89 NULL, /* terminator */
93 static ssize_t pmdown_time_show(struct device *dev,
94 struct device_attribute *attr, char *buf)
96 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
98 return sprintf(buf, "%ld\n", rtd->pmdown_time);
101 static ssize_t pmdown_time_set(struct device *dev,
102 struct device_attribute *attr,
103 const char *buf, size_t count)
105 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
108 ret = kstrtol(buf, 10, &rtd->pmdown_time);
115 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
117 static struct attribute *soc_dev_attrs[] = {
118 &dev_attr_pmdown_time.attr,
122 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
123 struct attribute *attr, int idx)
125 struct device *dev = kobj_to_dev(kobj);
126 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
131 if (attr == &dev_attr_pmdown_time.attr)
132 return attr->mode; /* always visible */
133 return rtd->num_codecs ? attr->mode : 0; /* enabled only with codec */
136 static const struct attribute_group soc_dapm_dev_group = {
137 .attrs = soc_dapm_dev_attrs,
138 .is_visible = soc_dev_attr_is_visible,
141 static const struct attribute_group soc_dev_group = {
142 .attrs = soc_dev_attrs,
143 .is_visible = soc_dev_attr_is_visible,
146 static const struct attribute_group *soc_dev_attr_groups[] = {
152 #ifdef CONFIG_DEBUG_FS
153 static void soc_init_component_debugfs(struct snd_soc_component *component)
155 if (!component->card->debugfs_card_root)
158 if (component->debugfs_prefix) {
161 name = kasprintf(GFP_KERNEL, "%s:%s",
162 component->debugfs_prefix, component->name);
164 component->debugfs_root = debugfs_create_dir(name,
165 component->card->debugfs_card_root);
169 component->debugfs_root = debugfs_create_dir(component->name,
170 component->card->debugfs_card_root);
173 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
174 component->debugfs_root);
177 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
179 if (!component->debugfs_root)
181 debugfs_remove_recursive(component->debugfs_root);
182 component->debugfs_root = NULL;
185 static int dai_list_show(struct seq_file *m, void *v)
187 struct snd_soc_component *component;
188 struct snd_soc_dai *dai;
190 mutex_lock(&client_mutex);
192 for_each_component(component)
193 for_each_component_dais(component, dai)
194 seq_printf(m, "%s\n", dai->name);
196 mutex_unlock(&client_mutex);
200 DEFINE_SHOW_ATTRIBUTE(dai_list);
202 static int component_list_show(struct seq_file *m, void *v)
204 struct snd_soc_component *component;
206 mutex_lock(&client_mutex);
208 for_each_component(component)
209 seq_printf(m, "%s\n", component->name);
211 mutex_unlock(&client_mutex);
215 DEFINE_SHOW_ATTRIBUTE(component_list);
217 static void soc_init_card_debugfs(struct snd_soc_card *card)
219 card->debugfs_card_root = debugfs_create_dir(card->name,
220 snd_soc_debugfs_root);
222 debugfs_create_u32("dapm_pop_time", 0644, card->debugfs_card_root,
225 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
228 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
230 debugfs_remove_recursive(card->debugfs_card_root);
231 card->debugfs_card_root = NULL;
234 static void snd_soc_debugfs_init(void)
236 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
238 debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
241 debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
242 &component_list_fops);
245 static void snd_soc_debugfs_exit(void)
247 debugfs_remove_recursive(snd_soc_debugfs_root);
252 static inline void soc_init_component_debugfs(
253 struct snd_soc_component *component)
257 static inline void soc_cleanup_component_debugfs(
258 struct snd_soc_component *component)
262 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
266 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
270 static inline void snd_soc_debugfs_init(void)
274 static inline void snd_soc_debugfs_exit(void)
281 * This is glue code between snd_pcm_lib_ioctl() and
282 * snd_soc_component_driver :: ioctl
284 int snd_soc_pcm_lib_ioctl(struct snd_soc_component *component,
285 struct snd_pcm_substream *substream,
286 unsigned int cmd, void *arg)
288 return snd_pcm_lib_ioctl(substream, cmd, arg);
290 EXPORT_SYMBOL_GPL(snd_soc_pcm_lib_ioctl);
292 static int snd_soc_rtdcom_add(struct snd_soc_pcm_runtime *rtd,
293 struct snd_soc_component *component)
295 struct snd_soc_rtdcom_list *rtdcom;
296 struct snd_soc_component *comp;
298 for_each_rtd_components(rtd, rtdcom, comp) {
299 /* already connected */
300 if (comp == component)
305 * created rtdcom here will be freed when rtd->dev was freed.
307 * soc_free_pcm_runtime() :: device_unregister(rtd->dev)
309 rtdcom = devm_kzalloc(rtd->dev, sizeof(*rtdcom), GFP_KERNEL);
313 rtdcom->component = component;
314 INIT_LIST_HEAD(&rtdcom->list);
317 * When rtd was freed, created rtdcom here will be
319 * And we don't need to call list_del(&rtdcom->list)
320 * when freed, because rtd is also freed.
322 list_add_tail(&rtdcom->list, &rtd->component_list);
327 struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
328 const char *driver_name)
330 struct snd_soc_rtdcom_list *rtdcom;
331 struct snd_soc_component *component;
339 * snd_soc_rtdcom_lookup() will find component from rtd by using
340 * specified driver name.
341 * But, if many components which have same driver name are connected
342 * to 1 rtd, this function will return 1st found component.
344 for_each_rtd_components(rtd, rtdcom, component) {
345 const char *component_name = component->driver->name;
350 if ((component_name == driver_name) ||
351 strcmp(component_name, driver_name) == 0)
352 return rtdcom->component;
357 EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
359 static struct snd_soc_component
360 *snd_soc_lookup_component_nolocked(struct device *dev, const char *driver_name)
362 struct snd_soc_component *component;
363 struct snd_soc_component *found_component;
365 found_component = NULL;
366 for_each_component(component) {
367 if ((dev == component->dev) &&
369 (driver_name == component->driver->name) ||
370 (strcmp(component->driver->name, driver_name) == 0))) {
371 found_component = component;
376 return found_component;
379 struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
380 const char *driver_name)
382 struct snd_soc_component *component;
384 mutex_lock(&client_mutex);
385 component = snd_soc_lookup_component_nolocked(dev, driver_name);
386 mutex_unlock(&client_mutex);
390 EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
392 static const struct snd_soc_ops null_snd_soc_ops;
394 struct snd_soc_pcm_runtime
395 *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
396 struct snd_soc_dai_link *dai_link)
398 struct snd_soc_pcm_runtime *rtd;
400 for_each_card_rtds(card, rtd) {
401 if (rtd->dai_link == dai_link)
404 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link->name);
407 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
409 static void soc_release_rtd_dev(struct device *dev)
411 /* "dev" means "rtd->dev" */
415 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
420 list_del(&rtd->list);
422 flush_delayed_work(&rtd->delayed_work);
423 snd_soc_pcm_component_free(rtd);
426 * we don't need to call kfree() for rtd->dev
428 * soc_release_rtd_dev()
430 * We don't need rtd->dev NULL check, because
431 * it is alloced *before* rtd.
433 * soc_new_pcm_runtime()
435 device_unregister(rtd->dev);
438 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
439 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
441 struct snd_soc_pcm_runtime *rtd;
448 dev = kzalloc(sizeof(struct device), GFP_KERNEL);
452 dev->parent = card->dev;
453 dev->release = soc_release_rtd_dev;
454 dev->groups = soc_dev_attr_groups;
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, sizeof(*rtd), GFP_KERNEL);
472 dev_set_drvdata(dev, rtd);
475 * for rtd->codec_dais
477 rtd->codec_dais = devm_kcalloc(dev, dai_link->num_codecs,
478 sizeof(struct snd_soc_dai *),
480 if (!rtd->codec_dais)
484 * rtd remaining settings
486 INIT_LIST_HEAD(&rtd->component_list);
487 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
488 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
489 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
490 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
493 rtd->dai_link = dai_link;
494 if (!rtd->dai_link->ops)
495 rtd->dai_link->ops = &null_snd_soc_ops;
497 /* see for_each_card_rtds */
498 list_add_tail(&rtd->list, &card->rtd_list);
499 rtd->num = card->num_rtd;
505 soc_free_pcm_runtime(rtd);
509 static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
511 struct snd_soc_pcm_runtime *rtd;
513 for_each_card_rtds(card, rtd)
514 flush_delayed_work(&rtd->delayed_work);
517 #ifdef CONFIG_PM_SLEEP
518 /* powers down audio subsystem for suspend */
519 int snd_soc_suspend(struct device *dev)
521 struct snd_soc_card *card = dev_get_drvdata(dev);
522 struct snd_soc_component *component;
523 struct snd_soc_pcm_runtime *rtd;
526 /* If the card is not initialized yet there is nothing to do */
527 if (!card->instantiated)
531 * Due to the resume being scheduled into a workqueue we could
532 * suspend before that's finished - wait for it to complete.
534 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
536 /* we're going to block userspace touching us until resume completes */
537 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
539 /* mute any active DACs */
540 for_each_card_rtds(card, rtd) {
541 struct snd_soc_dai *dai;
543 if (rtd->dai_link->ignore_suspend)
546 for_each_rtd_codec_dai(rtd, i, dai) {
547 if (dai->playback_active)
548 snd_soc_dai_digital_mute(dai, 1,
549 SNDRV_PCM_STREAM_PLAYBACK);
553 /* suspend all pcms */
554 for_each_card_rtds(card, rtd) {
555 if (rtd->dai_link->ignore_suspend)
558 snd_pcm_suspend_all(rtd->pcm);
561 if (card->suspend_pre)
562 card->suspend_pre(card);
564 for_each_card_rtds(card, rtd) {
565 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
567 if (rtd->dai_link->ignore_suspend)
570 if (!cpu_dai->driver->bus_control)
571 snd_soc_dai_suspend(cpu_dai);
574 /* close any waiting streams */
575 snd_soc_flush_all_delayed_work(card);
577 for_each_card_rtds(card, rtd) {
579 if (rtd->dai_link->ignore_suspend)
582 snd_soc_dapm_stream_event(rtd,
583 SNDRV_PCM_STREAM_PLAYBACK,
584 SND_SOC_DAPM_STREAM_SUSPEND);
586 snd_soc_dapm_stream_event(rtd,
587 SNDRV_PCM_STREAM_CAPTURE,
588 SND_SOC_DAPM_STREAM_SUSPEND);
591 /* Recheck all endpoints too, their state is affected by suspend */
592 dapm_mark_endpoints_dirty(card);
593 snd_soc_dapm_sync(&card->dapm);
595 /* suspend all COMPONENTs */
596 for_each_card_components(card, component) {
597 struct snd_soc_dapm_context *dapm =
598 snd_soc_component_get_dapm(component);
601 * If there are paths active then the COMPONENT will be held
602 * with bias _ON and should not be suspended.
604 if (!snd_soc_component_is_suspended(component)) {
605 switch (snd_soc_dapm_get_bias_level(dapm)) {
606 case SND_SOC_BIAS_STANDBY:
608 * If the COMPONENT is capable of idle
609 * bias off then being in STANDBY
610 * means it's doing something,
611 * otherwise fall through.
613 if (dapm->idle_bias_off) {
614 dev_dbg(component->dev,
615 "ASoC: idle_bias_off CODEC on over suspend\n");
620 case SND_SOC_BIAS_OFF:
621 snd_soc_component_suspend(component);
622 if (component->regmap)
623 regcache_mark_dirty(component->regmap);
624 /* deactivate pins to sleep state */
625 pinctrl_pm_select_sleep_state(component->dev);
628 dev_dbg(component->dev,
629 "ASoC: COMPONENT is on over suspend\n");
635 for_each_card_rtds(card, rtd) {
636 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
638 if (rtd->dai_link->ignore_suspend)
641 if (cpu_dai->driver->bus_control)
642 snd_soc_dai_suspend(cpu_dai);
644 /* deactivate pins to sleep state */
645 pinctrl_pm_select_sleep_state(cpu_dai->dev);
648 if (card->suspend_post)
649 card->suspend_post(card);
653 EXPORT_SYMBOL_GPL(snd_soc_suspend);
656 * deferred resume work, so resume can complete before we finished
657 * setting our codec back up, which can be very slow on I2C
659 static void soc_resume_deferred(struct work_struct *work)
661 struct snd_soc_card *card =
662 container_of(work, struct snd_soc_card,
663 deferred_resume_work);
664 struct snd_soc_pcm_runtime *rtd;
665 struct snd_soc_component *component;
669 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
670 * so userspace apps are blocked from touching us
673 dev_dbg(card->dev, "ASoC: starting resume work\n");
675 /* Bring us up into D2 so that DAPM starts enabling things */
676 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
678 if (card->resume_pre)
679 card->resume_pre(card);
681 /* resume control bus DAIs */
682 for_each_card_rtds(card, rtd) {
683 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
685 if (rtd->dai_link->ignore_suspend)
688 if (cpu_dai->driver->bus_control)
689 snd_soc_dai_resume(cpu_dai);
692 for_each_card_components(card, component) {
693 if (snd_soc_component_is_suspended(component))
694 snd_soc_component_resume(component);
697 for_each_card_rtds(card, rtd) {
699 if (rtd->dai_link->ignore_suspend)
702 snd_soc_dapm_stream_event(rtd,
703 SNDRV_PCM_STREAM_PLAYBACK,
704 SND_SOC_DAPM_STREAM_RESUME);
706 snd_soc_dapm_stream_event(rtd,
707 SNDRV_PCM_STREAM_CAPTURE,
708 SND_SOC_DAPM_STREAM_RESUME);
711 /* unmute any active DACs */
712 for_each_card_rtds(card, rtd) {
713 struct snd_soc_dai *dai;
715 if (rtd->dai_link->ignore_suspend)
718 for_each_rtd_codec_dai(rtd, i, dai) {
719 if (dai->playback_active)
720 snd_soc_dai_digital_mute(dai, 0,
721 SNDRV_PCM_STREAM_PLAYBACK);
725 for_each_card_rtds(card, rtd) {
726 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
728 if (rtd->dai_link->ignore_suspend)
731 if (!cpu_dai->driver->bus_control)
732 snd_soc_dai_resume(cpu_dai);
735 if (card->resume_post)
736 card->resume_post(card);
738 dev_dbg(card->dev, "ASoC: resume work completed\n");
740 /* Recheck all endpoints too, their state is affected by suspend */
741 dapm_mark_endpoints_dirty(card);
742 snd_soc_dapm_sync(&card->dapm);
744 /* userspace can access us now we are back as we were before */
745 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
748 /* powers up audio subsystem after a suspend */
749 int snd_soc_resume(struct device *dev)
751 struct snd_soc_card *card = dev_get_drvdata(dev);
752 bool bus_control = false;
753 struct snd_soc_pcm_runtime *rtd;
754 struct snd_soc_dai *codec_dai;
757 /* If the card is not initialized yet there is nothing to do */
758 if (!card->instantiated)
761 /* activate pins from sleep state */
762 for_each_card_rtds(card, rtd) {
763 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
766 pinctrl_pm_select_default_state(cpu_dai->dev);
768 for_each_rtd_codec_dai(rtd, i, codec_dai) {
769 if (codec_dai->active)
770 pinctrl_pm_select_default_state(codec_dai->dev);
775 * DAIs that also act as the control bus master might have other drivers
776 * hanging off them so need to resume immediately. Other drivers don't
777 * have that problem and may take a substantial amount of time to resume
778 * due to I/O costs and anti-pop so handle them out of line.
780 for_each_card_rtds(card, rtd) {
781 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
783 bus_control |= cpu_dai->driver->bus_control;
786 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
787 soc_resume_deferred(&card->deferred_resume_work);
789 dev_dbg(dev, "ASoC: Scheduling resume work\n");
790 if (!schedule_work(&card->deferred_resume_work))
791 dev_err(dev, "ASoC: resume work item may be lost\n");
796 EXPORT_SYMBOL_GPL(snd_soc_resume);
798 static void soc_resume_init(struct snd_soc_card *card)
800 /* deferred resume work */
801 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
804 #define snd_soc_suspend NULL
805 #define snd_soc_resume NULL
806 static inline void soc_resume_init(struct snd_soc_card *card)
811 static const struct snd_soc_dai_ops null_dai_ops = {
814 static struct device_node
815 *soc_component_to_node(struct snd_soc_component *component)
817 struct device_node *of_node;
819 of_node = component->dev->of_node;
820 if (!of_node && component->dev->parent)
821 of_node = component->dev->parent->of_node;
826 static int snd_soc_is_matching_component(
827 const struct snd_soc_dai_link_component *dlc,
828 struct snd_soc_component *component)
830 struct device_node *component_of_node;
835 component_of_node = soc_component_to_node(component);
837 if (dlc->of_node && component_of_node != dlc->of_node)
839 if (dlc->name && strcmp(component->name, dlc->name))
845 static struct snd_soc_component *soc_find_component(
846 const struct snd_soc_dai_link_component *dlc)
848 struct snd_soc_component *component;
850 lockdep_assert_held(&client_mutex);
855 * It returns *1st* found component, but some driver
856 * has few components by same of_node/name
858 * CPU component and generic DMAEngine component
860 for_each_component(component)
861 if (snd_soc_is_matching_component(dlc, component))
868 * snd_soc_find_dai - Find a registered DAI
870 * @dlc: name of the DAI or the DAI driver and optional component info to match
872 * This function will search all registered components and their DAIs to
873 * find the DAI of the same name. The component's of_node and name
874 * should also match if being specified.
876 * Return: pointer of DAI, or NULL if not found.
878 struct snd_soc_dai *snd_soc_find_dai(
879 const struct snd_soc_dai_link_component *dlc)
881 struct snd_soc_component *component;
882 struct snd_soc_dai *dai;
884 lockdep_assert_held(&client_mutex);
886 /* Find CPU DAI from registered DAIs */
887 for_each_component(component) {
888 if (!snd_soc_is_matching_component(dlc, component))
890 for_each_component_dais(component, dai) {
891 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
892 && (!dai->driver->name
893 || strcmp(dai->driver->name, dlc->dai_name)))
902 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
905 * snd_soc_find_dai_link - Find a DAI link
908 * @id: DAI link ID to match
909 * @name: DAI link name to match, optional
910 * @stream_name: DAI link stream name to match, optional
912 * This function will search all existing DAI links of the soc card to
913 * find the link of the same ID. Since DAI links may not have their
914 * unique ID, so name and stream name should also match if being
917 * Return: pointer of DAI link, or NULL if not found.
919 struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
920 int id, const char *name,
921 const char *stream_name)
923 struct snd_soc_pcm_runtime *rtd;
924 struct snd_soc_dai_link *link;
926 lockdep_assert_held(&client_mutex);
928 for_each_card_rtds(card, rtd) {
929 link = rtd->dai_link;
934 if (name && (!link->name || strcmp(name, link->name)))
937 if (stream_name && (!link->stream_name
938 || strcmp(stream_name, link->stream_name)))
946 EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);
948 static int soc_dai_link_sanity_check(struct snd_soc_card *card,
949 struct snd_soc_dai_link *link)
952 struct snd_soc_dai_link_component *codec, *platform;
954 for_each_link_codecs(link, i, codec) {
956 * Codec must be specified by 1 of name or OF node,
957 * not both or neither.
959 if (!!codec->name == !!codec->of_node) {
960 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
965 /* Codec DAI name must be specified */
966 if (!codec->dai_name) {
967 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
973 * Defer card registration if codec component is not added to
976 if (!soc_find_component(codec))
977 return -EPROBE_DEFER;
980 for_each_link_platforms(link, i, platform) {
982 * Platform may be specified by either name or OF node, but it
983 * can be left unspecified, then no components will be inserted
986 if (!!platform->name == !!platform->of_node) {
988 "ASoC: Neither/both platform name/of_node are set for %s\n",
994 * Defer card registration if platform component is not added to
997 if (!soc_find_component(platform))
998 return -EPROBE_DEFER;
1002 if (link->num_cpus > 1) {
1004 "ASoC: multi cpu is not yet supported %s\n",
1010 * CPU device may be specified by either name or OF node, but
1011 * can be left unspecified, and will be matched based on DAI
1014 if (link->cpus->name && link->cpus->of_node) {
1016 "ASoC: Neither/both cpu name/of_node are set for %s\n",
1022 * Defer card registration if cpu dai component is not added to
1025 if ((link->cpus->of_node || link->cpus->name) &&
1026 !soc_find_component(link->cpus))
1027 return -EPROBE_DEFER;
1030 * At least one of CPU DAI name or CPU device name/node must be
1033 if (!link->cpus->dai_name &&
1034 !(link->cpus->name || link->cpus->of_node)) {
1036 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
1045 * snd_soc_remove_dai_link - Remove a DAI link from the list
1046 * @card: The ASoC card that owns the link
1047 * @dai_link: The DAI link to remove
1049 * This function removes a DAI link from the ASoC card's link list.
1051 * For DAI links previously added by topology, topology should
1052 * remove them by using the dobj embedded in the link.
1054 void snd_soc_remove_dai_link(struct snd_soc_card *card,
1055 struct snd_soc_dai_link *dai_link)
1057 struct snd_soc_pcm_runtime *rtd;
1059 lockdep_assert_held(&client_mutex);
1062 * Notify the machine driver for extra destruction
1064 if (card->remove_dai_link)
1065 card->remove_dai_link(card, dai_link);
1067 rtd = snd_soc_get_pcm_runtime(card, dai_link);
1069 soc_free_pcm_runtime(rtd);
1071 EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);
1074 * snd_soc_add_dai_link - Add a DAI link dynamically
1075 * @card: The ASoC card to which the DAI link is added
1076 * @dai_link: The new DAI link to add
1078 * This function adds a DAI link to the ASoC card's link list.
1080 * Note: Topology can use this API to add DAI links when probing the
1081 * topology component. And machine drivers can still define static
1082 * DAI links in dai_link array.
1084 int snd_soc_add_dai_link(struct snd_soc_card *card,
1085 struct snd_soc_dai_link *dai_link)
1087 struct snd_soc_pcm_runtime *rtd;
1088 struct snd_soc_dai_link_component *codec, *platform;
1089 struct snd_soc_component *component;
1092 lockdep_assert_held(&client_mutex);
1095 * Notify the machine driver for extra initialization
1097 if (card->add_dai_link)
1098 card->add_dai_link(card, dai_link);
1100 if (dai_link->ignore)
1103 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1105 ret = soc_dai_link_sanity_check(card, dai_link);
1109 rtd = soc_new_pcm_runtime(card, dai_link);
1113 /* FIXME: we need multi CPU support in the future */
1114 rtd->cpu_dai = snd_soc_find_dai(dai_link->cpus);
1115 if (!rtd->cpu_dai) {
1116 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1117 dai_link->cpus->dai_name);
1120 snd_soc_rtdcom_add(rtd, rtd->cpu_dai->component);
1122 /* Find CODEC from registered CODECs */
1123 rtd->num_codecs = dai_link->num_codecs;
1124 for_each_link_codecs(dai_link, i, codec) {
1125 rtd->codec_dais[i] = snd_soc_find_dai(codec);
1126 if (!rtd->codec_dais[i]) {
1127 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
1132 snd_soc_rtdcom_add(rtd, rtd->codec_dais[i]->component);
1135 /* Single codec links expect codec and codec_dai in runtime data */
1136 rtd->codec_dai = rtd->codec_dais[0];
1138 /* Find PLATFORM from registered PLATFORMs */
1139 for_each_link_platforms(dai_link, i, platform) {
1140 for_each_component(component) {
1141 if (!snd_soc_is_matching_component(platform, component))
1144 snd_soc_rtdcom_add(rtd, component);
1151 soc_free_pcm_runtime(rtd);
1152 return -EPROBE_DEFER;
1154 EXPORT_SYMBOL_GPL(snd_soc_add_dai_link);
1156 static void soc_set_of_name_prefix(struct snd_soc_component *component)
1158 struct device_node *of_node = soc_component_to_node(component);
1162 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1164 component->name_prefix = str;
1167 static void soc_set_name_prefix(struct snd_soc_card *card,
1168 struct snd_soc_component *component)
1172 for (i = 0; i < card->num_configs && card->codec_conf; i++) {
1173 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1174 struct device_node *of_node = soc_component_to_node(component);
1176 if (map->of_node && of_node != map->of_node)
1178 if (map->dev_name && strcmp(component->name, map->dev_name))
1180 component->name_prefix = map->name_prefix;
1185 * If there is no configuration table or no match in the table,
1186 * check if a prefix is provided in the node
1188 soc_set_of_name_prefix(component);
1191 static void soc_remove_component(struct snd_soc_component *component,
1195 if (!component->card)
1199 snd_soc_component_remove(component);
1201 /* For framework level robustness */
1202 snd_soc_component_set_jack(component, NULL, NULL);
1204 list_del_init(&component->card_list);
1205 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1206 soc_cleanup_component_debugfs(component);
1207 component->card = NULL;
1208 snd_soc_component_module_put_when_remove(component);
1211 static int soc_probe_component(struct snd_soc_card *card,
1212 struct snd_soc_component *component)
1214 struct snd_soc_dapm_context *dapm =
1215 snd_soc_component_get_dapm(component);
1216 struct snd_soc_dai *dai;
1220 if (!strcmp(component->name, "snd-soc-dummy"))
1223 if (component->card) {
1224 if (component->card != card) {
1225 dev_err(component->dev,
1226 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1227 card->name, component->card->name);
1233 ret = snd_soc_component_module_get_when_probe(component);
1237 component->card = card;
1238 soc_set_name_prefix(card, component);
1240 soc_init_component_debugfs(component);
1242 snd_soc_dapm_init(dapm, card, component);
1244 ret = snd_soc_dapm_new_controls(dapm,
1245 component->driver->dapm_widgets,
1246 component->driver->num_dapm_widgets);
1249 dev_err(component->dev,
1250 "Failed to create new controls %d\n", ret);
1254 for_each_component_dais(component, dai) {
1255 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1257 dev_err(component->dev,
1258 "Failed to create DAI widgets %d\n", ret);
1263 ret = snd_soc_component_probe(component);
1265 dev_err(component->dev,
1266 "ASoC: failed to probe component %d\n", ret);
1269 WARN(dapm->idle_bias_off &&
1270 dapm->bias_level != SND_SOC_BIAS_OFF,
1271 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1275 /* machine specific init */
1276 if (component->init) {
1277 ret = component->init(component);
1279 dev_err(component->dev,
1280 "Failed to do machine specific init %d\n", ret);
1285 ret = snd_soc_add_component_controls(component,
1286 component->driver->controls,
1287 component->driver->num_controls);
1291 ret = snd_soc_dapm_add_routes(dapm,
1292 component->driver->dapm_routes,
1293 component->driver->num_dapm_routes);
1297 /* see for_each_card_components */
1298 list_add(&component->card_list, &card->component_dev_list);
1302 soc_remove_component(component, probed);
1307 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1311 if (!dai || !dai->probed || !dai->driver ||
1312 dai->driver->remove_order != order)
1315 err = snd_soc_dai_remove(dai);
1318 "ASoC: failed to remove %s: %d\n",
1324 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1329 dai->driver->probe_order != order)
1332 ret = snd_soc_dai_probe(dai);
1334 dev_err(dai->dev, "ASoC: failed to probe DAI %s: %d\n",
1344 static void soc_remove_link_dais(struct snd_soc_card *card)
1347 struct snd_soc_dai *codec_dai;
1348 struct snd_soc_pcm_runtime *rtd;
1351 for_each_comp_order(order) {
1352 for_each_card_rtds(card, rtd) {
1353 /* remove the CODEC DAI */
1354 for_each_rtd_codec_dai(rtd, i, codec_dai)
1355 soc_remove_dai(codec_dai, order);
1357 soc_remove_dai(rtd->cpu_dai, order);
1362 static int soc_probe_link_dais(struct snd_soc_card *card)
1364 struct snd_soc_dai *codec_dai;
1365 struct snd_soc_pcm_runtime *rtd;
1368 for_each_comp_order(order) {
1369 for_each_card_rtds(card, rtd) {
1372 "ASoC: probe %s dai link %d late %d\n",
1373 card->name, rtd->num, order);
1375 ret = soc_probe_dai(rtd->cpu_dai, order);
1379 /* probe the CODEC DAI */
1380 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1381 ret = soc_probe_dai(codec_dai, order);
1391 static void soc_remove_link_components(struct snd_soc_card *card)
1393 struct snd_soc_component *component;
1394 struct snd_soc_pcm_runtime *rtd;
1395 struct snd_soc_rtdcom_list *rtdcom;
1398 for_each_comp_order(order) {
1399 for_each_card_rtds(card, rtd) {
1400 for_each_rtd_components(rtd, rtdcom, component) {
1401 if (component->driver->remove_order != order)
1404 soc_remove_component(component, 1);
1410 static int soc_probe_link_components(struct snd_soc_card *card)
1412 struct snd_soc_component *component;
1413 struct snd_soc_pcm_runtime *rtd;
1414 struct snd_soc_rtdcom_list *rtdcom;
1417 for_each_comp_order(order) {
1418 for_each_card_rtds(card, rtd) {
1419 for_each_rtd_components(rtd, rtdcom, component) {
1420 if (component->driver->probe_order != order)
1423 ret = soc_probe_component(card, component);
1433 static int soc_link_dai_pcm_new(struct snd_soc_dai **dais, int num_dais,
1434 struct snd_soc_pcm_runtime *rtd)
1438 for (i = 0; i < num_dais; ++i) {
1439 struct snd_soc_dai_driver *drv = dais[i]->driver;
1442 ret = drv->pcm_new(rtd, dais[i]);
1444 dev_err(dais[i]->dev,
1445 "ASoC: Failed to bind %s with pcm device\n",
1454 static int soc_link_init(struct snd_soc_card *card,
1455 struct snd_soc_pcm_runtime *rtd)
1457 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1458 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1459 struct snd_soc_rtdcom_list *rtdcom;
1460 struct snd_soc_component *component;
1463 /* set default power off timeout */
1464 rtd->pmdown_time = pmdown_time;
1466 /* do machine specific initialization */
1467 if (dai_link->init) {
1468 ret = dai_link->init(rtd);
1470 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1471 dai_link->name, ret);
1476 if (dai_link->dai_fmt) {
1477 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1482 /* add DPCM sysfs entries */
1483 soc_dpcm_debugfs_add(rtd);
1488 * most drivers will register their PCMs using DAI link ordering but
1489 * topology based drivers can use the DAI link id field to set PCM
1490 * device number and then use rtd + a base offset of the BEs.
1492 for_each_rtd_components(rtd, rtdcom, component) {
1493 if (!component->driver->use_dai_pcm_id)
1496 if (rtd->dai_link->no_pcm)
1497 num += component->driver->be_pcm_base;
1499 num = rtd->dai_link->id;
1502 /* create compress_device if possible */
1503 ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1504 if (ret != -ENOTSUPP) {
1506 dev_err(card->dev, "ASoC: can't create compress %s\n",
1507 dai_link->stream_name);
1511 /* create the pcm */
1512 ret = soc_new_pcm(rtd, num);
1514 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1515 dai_link->stream_name, ret);
1518 ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd);
1521 ret = soc_link_dai_pcm_new(rtd->codec_dais,
1522 rtd->num_codecs, rtd);
1526 static void soc_unbind_aux_dev(struct snd_soc_card *card)
1528 struct snd_soc_component *component, *_component;
1530 for_each_card_auxs_safe(card, component, _component) {
1531 component->init = NULL;
1532 list_del(&component->card_aux_list);
1536 static int soc_bind_aux_dev(struct snd_soc_card *card)
1538 struct snd_soc_component *component;
1539 struct snd_soc_aux_dev *aux;
1542 for_each_card_pre_auxs(card, i, aux) {
1543 /* codecs, usually analog devices */
1544 component = soc_find_component(&aux->dlc);
1546 return -EPROBE_DEFER;
1548 component->init = aux->init;
1549 /* see for_each_card_auxs */
1550 list_add(&component->card_aux_list, &card->aux_comp_list);
1555 static int soc_probe_aux_devices(struct snd_soc_card *card)
1557 struct snd_soc_component *component;
1561 for_each_comp_order(order) {
1562 for_each_card_auxs(card, component) {
1563 if (component->driver->probe_order != order)
1566 ret = soc_probe_component(card, component);
1575 static void soc_remove_aux_devices(struct snd_soc_card *card)
1577 struct snd_soc_component *comp, *_comp;
1580 for_each_comp_order(order) {
1581 for_each_card_auxs_safe(card, comp, _comp) {
1582 if (comp->driver->remove_order == order)
1583 soc_remove_component(comp, 1);
1589 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1590 * @rtd: The runtime for which the DAI link format should be changed
1591 * @dai_fmt: The new DAI link format
1593 * This function updates the DAI link format for all DAIs connected to the DAI
1594 * link for the specified runtime.
1596 * Note: For setups with a static format set the dai_fmt field in the
1597 * corresponding snd_dai_link struct instead of using this function.
1599 * Returns 0 on success, otherwise a negative error code.
1601 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1602 unsigned int dai_fmt)
1604 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1605 struct snd_soc_dai *codec_dai;
1609 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1610 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1611 if (ret != 0 && ret != -ENOTSUPP) {
1612 dev_warn(codec_dai->dev,
1613 "ASoC: Failed to set DAI format: %d\n", ret);
1619 * Flip the polarity for the "CPU" end of a CODEC<->CODEC link
1620 * the component which has non_legacy_dai_naming is Codec
1622 if (cpu_dai->component->driver->non_legacy_dai_naming) {
1623 unsigned int inv_dai_fmt;
1625 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1626 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1627 case SND_SOC_DAIFMT_CBM_CFM:
1628 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1630 case SND_SOC_DAIFMT_CBM_CFS:
1631 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1633 case SND_SOC_DAIFMT_CBS_CFM:
1634 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1636 case SND_SOC_DAIFMT_CBS_CFS:
1637 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1641 dai_fmt = inv_dai_fmt;
1644 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1645 if (ret != 0 && ret != -ENOTSUPP) {
1646 dev_warn(cpu_dai->dev,
1647 "ASoC: Failed to set DAI format: %d\n", ret);
1653 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1657 * Trim special characters, and replace '-' with '_' since '-' is used to
1658 * separate different DMI fields in the card long name. Only number and
1659 * alphabet characters and a few separator characters are kept.
1661 static void cleanup_dmi_name(char *name)
1665 for (i = 0; name[i]; i++) {
1666 if (isalnum(name[i]) || (name[i] == '.')
1667 || (name[i] == '_'))
1668 name[j++] = name[i];
1669 else if (name[i] == '-')
1677 * Check if a DMI field is valid, i.e. not containing any string
1678 * in the black list.
1680 static int is_dmi_valid(const char *field)
1684 while (dmi_blacklist[i]) {
1685 if (strstr(field, dmi_blacklist[i]))
1694 * Append a string to card->dmi_longname with character cleanups.
1696 static void append_dmi_string(struct snd_soc_card *card, const char *str)
1698 char *dst = card->dmi_longname;
1699 size_t dst_len = sizeof(card->dmi_longname);
1703 snprintf(dst + len, dst_len - len, "-%s", str);
1705 len++; /* skip the separator "-" */
1707 cleanup_dmi_name(dst + len);
1711 * snd_soc_set_dmi_name() - Register DMI names to card
1712 * @card: The card to register DMI names
1713 * @flavour: The flavour "differentiator" for the card amongst its peers.
1715 * An Intel machine driver may be used by many different devices but are
1716 * difficult for userspace to differentiate, since machine drivers ususally
1717 * use their own name as the card short name and leave the card long name
1718 * blank. To differentiate such devices and fix bugs due to lack of
1719 * device-specific configurations, this function allows DMI info to be used
1720 * as the sound card long name, in the format of
1721 * "vendor-product-version-board"
1722 * (Character '-' is used to separate different DMI fields here).
1723 * This will help the user space to load the device-specific Use Case Manager
1724 * (UCM) configurations for the card.
1726 * Possible card long names may be:
1727 * DellInc.-XPS139343-01-0310JH
1728 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1729 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1731 * This function also supports flavoring the card longname to provide
1732 * the extra differentiation, like "vendor-product-version-board-flavor".
1734 * We only keep number and alphabet characters and a few separator characters
1735 * in the card long name since UCM in the user space uses the card long names
1736 * as card configuration directory names and AudoConf cannot support special
1737 * charactors like SPACE.
1739 * Returns 0 on success, otherwise a negative error code.
1741 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1743 const char *vendor, *product, *product_version, *board;
1745 if (card->long_name)
1746 return 0; /* long name already set by driver or from DMI */
1748 /* make up dmi long name as: vendor-product-version-board */
1749 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1750 if (!vendor || !is_dmi_valid(vendor)) {
1751 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1755 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1756 cleanup_dmi_name(card->dmi_longname);
1758 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1759 if (product && is_dmi_valid(product)) {
1760 append_dmi_string(card, product);
1763 * some vendors like Lenovo may only put a self-explanatory
1764 * name in the product version field
1766 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1767 if (product_version && is_dmi_valid(product_version))
1768 append_dmi_string(card, product_version);
1771 board = dmi_get_system_info(DMI_BOARD_NAME);
1772 if (board && is_dmi_valid(board)) {
1773 if (!product || strcasecmp(board, product))
1774 append_dmi_string(card, board);
1775 } else if (!product) {
1776 /* fall back to using legacy name */
1777 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1781 /* Add flavour to dmi long name */
1783 append_dmi_string(card, flavour);
1785 /* set the card long name */
1786 card->long_name = card->dmi_longname;
1790 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1791 #endif /* CONFIG_DMI */
1793 static void soc_check_tplg_fes(struct snd_soc_card *card)
1795 struct snd_soc_component *component;
1796 const struct snd_soc_component_driver *comp_drv;
1797 struct snd_soc_dai_link *dai_link;
1800 for_each_component(component) {
1802 /* does this component override BEs ? */
1803 if (!component->driver->ignore_machine)
1806 /* for this machine ? */
1807 if (!strcmp(component->driver->ignore_machine,
1808 card->dev->driver->name))
1810 if (strcmp(component->driver->ignore_machine,
1811 dev_name(card->dev)))
1814 /* machine matches, so override the rtd data */
1815 for_each_card_prelinks(card, i, dai_link) {
1817 /* ignore this FE */
1818 if (dai_link->dynamic) {
1819 dai_link->ignore = true;
1823 dev_info(card->dev, "info: override BE DAI link %s\n",
1824 card->dai_link[i].name);
1826 /* override platform component */
1827 if (!dai_link->platforms) {
1828 dev_err(card->dev, "init platform error");
1831 dai_link->platforms->name = component->name;
1833 /* convert non BE into BE */
1834 dai_link->no_pcm = 1;
1836 /* override any BE fixups */
1837 dai_link->be_hw_params_fixup =
1838 component->driver->be_hw_params_fixup;
1841 * most BE links don't set stream name, so set it to
1842 * dai link name if it's NULL to help bind widgets.
1844 if (!dai_link->stream_name)
1845 dai_link->stream_name = dai_link->name;
1848 /* Inform userspace we are using alternate topology */
1849 if (component->driver->topology_name_prefix) {
1851 /* topology shortname created? */
1852 if (!card->topology_shortname_created) {
1853 comp_drv = component->driver;
1855 snprintf(card->topology_shortname, 32, "%s-%s",
1856 comp_drv->topology_name_prefix,
1858 card->topology_shortname_created = true;
1861 /* use topology shortname */
1862 card->name = card->topology_shortname;
1867 #define soc_setup_card_name(name, name1, name2, norm) \
1868 __soc_setup_card_name(name, sizeof(name), name1, name2, norm)
1869 static void __soc_setup_card_name(char *name, int len,
1870 const char *name1, const char *name2,
1875 snprintf(name, len, "%s", name1 ? name1 : name2);
1881 * Name normalization
1883 * The driver name is somewhat special, as it's used as a key for
1884 * searches in the user-space.
1887 * "abcd??efg" -> "abcd__efg"
1889 for (i = 0; i < len; i++) {
1896 if (!isalnum(name[i]))
1903 static void soc_cleanup_card_resources(struct snd_soc_card *card,
1906 struct snd_soc_pcm_runtime *rtd, *n;
1909 snd_card_disconnect_sync(card->snd_card);
1911 snd_soc_dapm_shutdown(card);
1913 /* remove and free each DAI */
1914 soc_remove_link_dais(card);
1915 soc_remove_link_components(card);
1917 for_each_card_rtds_safe(card, rtd, n)
1918 snd_soc_remove_dai_link(card, rtd->dai_link);
1920 /* remove auxiliary devices */
1921 soc_remove_aux_devices(card);
1922 soc_unbind_aux_dev(card);
1924 snd_soc_dapm_free(&card->dapm);
1925 soc_cleanup_card_debugfs(card);
1927 /* remove the card */
1928 if (card_probed && card->remove)
1931 if (card->snd_card) {
1932 snd_card_free(card->snd_card);
1933 card->snd_card = NULL;
1937 static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
1939 if (card->instantiated) {
1940 int card_probed = 1;
1942 card->instantiated = false;
1943 snd_soc_flush_all_delayed_work(card);
1945 soc_cleanup_card_resources(card, card_probed);
1947 list_add(&card->list, &unbind_card_list);
1950 list_del(&card->list);
1954 static int snd_soc_bind_card(struct snd_soc_card *card)
1956 struct snd_soc_pcm_runtime *rtd;
1957 struct snd_soc_dai_link *dai_link;
1958 int ret, i, card_probed = 0;
1960 mutex_lock(&client_mutex);
1961 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1963 snd_soc_dapm_init(&card->dapm, card, NULL);
1965 /* check whether any platform is ignore machine FE and using topology */
1966 soc_check_tplg_fes(card);
1968 /* bind aux_devs too */
1969 ret = soc_bind_aux_dev(card);
1973 /* add predefined DAI links to the list */
1975 for_each_card_prelinks(card, i, dai_link) {
1976 ret = snd_soc_add_dai_link(card, dai_link);
1981 /* card bind complete so register a sound card */
1982 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1983 card->owner, 0, &card->snd_card);
1986 "ASoC: can't create sound card for card %s: %d\n",
1991 soc_init_card_debugfs(card);
1993 soc_resume_init(card);
1995 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1996 card->num_dapm_widgets);
2000 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2001 card->num_of_dapm_widgets);
2005 /* initialise the sound card only once */
2007 ret = card->probe(card);
2013 /* probe all components used by DAI links on this card */
2014 ret = soc_probe_link_components(card);
2017 "ASoC: failed to instantiate card %d\n", ret);
2021 /* probe auxiliary components */
2022 ret = soc_probe_aux_devices(card);
2025 "ASoC: failed to probe aux component %d\n", ret);
2029 /* probe all DAI links on this card */
2030 ret = soc_probe_link_dais(card);
2033 "ASoC: failed to instantiate card %d\n", ret);
2037 for_each_card_rtds(card, rtd)
2038 soc_link_init(card, rtd);
2040 snd_soc_dapm_link_dai_widgets(card);
2041 snd_soc_dapm_connect_dai_link_widgets(card);
2043 ret = snd_soc_add_card_controls(card, card->controls,
2044 card->num_controls);
2048 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2049 card->num_dapm_routes);
2053 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2054 card->num_of_dapm_routes);
2058 /* try to set some sane longname if DMI is available */
2059 snd_soc_set_dmi_name(card, NULL);
2061 soc_setup_card_name(card->snd_card->shortname,
2062 card->name, NULL, 0);
2063 soc_setup_card_name(card->snd_card->longname,
2064 card->long_name, card->name, 0);
2065 soc_setup_card_name(card->snd_card->driver,
2066 card->driver_name, card->name, 1);
2068 if (card->components) {
2069 /* the current implementation of snd_component_add() accepts */
2070 /* multiple components in the string separated by space, */
2071 /* but the string collision (identical string) check might */
2072 /* not work correctly */
2073 ret = snd_component_add(card->snd_card, card->components);
2075 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
2081 if (card->late_probe) {
2082 ret = card->late_probe(card);
2084 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2091 snd_soc_dapm_new_widgets(card);
2093 ret = snd_card_register(card->snd_card);
2095 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2100 card->instantiated = 1;
2101 dapm_mark_endpoints_dirty(card);
2102 snd_soc_dapm_sync(&card->dapm);
2104 /* deactivate pins to sleep state */
2105 for_each_card_rtds(card, rtd) {
2106 struct snd_soc_dai *dai;
2108 for_each_rtd_codec_dai(rtd, i, dai) {
2110 pinctrl_pm_select_sleep_state(dai->dev);
2113 if (!rtd->cpu_dai->active)
2114 pinctrl_pm_select_sleep_state(rtd->cpu_dai->dev);
2119 soc_cleanup_card_resources(card, card_probed);
2121 mutex_unlock(&card->mutex);
2122 mutex_unlock(&client_mutex);
2127 /* probes a new socdev */
2128 static int soc_probe(struct platform_device *pdev)
2130 struct snd_soc_card *card = platform_get_drvdata(pdev);
2133 * no card, so machine driver should be registering card
2134 * we should not be here in that case so ret error
2139 dev_warn(&pdev->dev,
2140 "ASoC: machine %s should use snd_soc_register_card()\n",
2143 /* Bodge while we unpick instantiation */
2144 card->dev = &pdev->dev;
2146 return snd_soc_register_card(card);
2149 /* removes a socdev */
2150 static int soc_remove(struct platform_device *pdev)
2152 struct snd_soc_card *card = platform_get_drvdata(pdev);
2154 snd_soc_unregister_card(card);
2158 int snd_soc_poweroff(struct device *dev)
2160 struct snd_soc_card *card = dev_get_drvdata(dev);
2161 struct snd_soc_pcm_runtime *rtd;
2163 if (!card->instantiated)
2167 * Flush out pmdown_time work - we actually do want to run it
2168 * now, we're shutting down so no imminent restart.
2170 snd_soc_flush_all_delayed_work(card);
2172 snd_soc_dapm_shutdown(card);
2174 /* deactivate pins to sleep state */
2175 for_each_card_rtds(card, rtd) {
2176 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2177 struct snd_soc_dai *codec_dai;
2180 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2181 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2182 pinctrl_pm_select_sleep_state(codec_dai->dev);
2188 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2190 const struct dev_pm_ops snd_soc_pm_ops = {
2191 .suspend = snd_soc_suspend,
2192 .resume = snd_soc_resume,
2193 .freeze = snd_soc_suspend,
2194 .thaw = snd_soc_resume,
2195 .poweroff = snd_soc_poweroff,
2196 .restore = snd_soc_resume,
2198 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2200 /* ASoC platform driver */
2201 static struct platform_driver soc_driver = {
2203 .name = "soc-audio",
2204 .pm = &snd_soc_pm_ops,
2207 .remove = soc_remove,
2211 * snd_soc_cnew - create new control
2212 * @_template: control template
2213 * @data: control private data
2214 * @long_name: control long name
2215 * @prefix: control name prefix
2217 * Create a new mixer control from a template control.
2219 * Returns 0 for success, else error.
2221 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2222 void *data, const char *long_name,
2225 struct snd_kcontrol_new template;
2226 struct snd_kcontrol *kcontrol;
2229 memcpy(&template, _template, sizeof(template));
2233 long_name = template.name;
2236 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2240 template.name = name;
2242 template.name = long_name;
2245 kcontrol = snd_ctl_new1(&template, data);
2251 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2253 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2254 const struct snd_kcontrol_new *controls, int num_controls,
2255 const char *prefix, void *data)
2259 for (i = 0; i < num_controls; i++) {
2260 const struct snd_kcontrol_new *control = &controls[i];
2262 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2263 control->name, prefix));
2265 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2266 control->name, err);
2274 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2277 struct snd_card *card = soc_card->snd_card;
2278 struct snd_kcontrol *kctl;
2280 if (unlikely(!name))
2283 list_for_each_entry(kctl, &card->controls, list)
2284 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2288 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2291 * snd_soc_add_component_controls - Add an array of controls to a component.
2293 * @component: Component to add controls to
2294 * @controls: Array of controls to add
2295 * @num_controls: Number of elements in the array
2297 * Return: 0 for success, else error.
2299 int snd_soc_add_component_controls(struct snd_soc_component *component,
2300 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2302 struct snd_card *card = component->card->snd_card;
2304 return snd_soc_add_controls(card, component->dev, controls,
2305 num_controls, component->name_prefix, component);
2307 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2310 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2311 * Convenience function to add a list of controls.
2313 * @soc_card: SoC card to add controls to
2314 * @controls: array of controls to add
2315 * @num_controls: number of elements in the array
2317 * Return 0 for success, else error.
2319 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2320 const struct snd_kcontrol_new *controls, int num_controls)
2322 struct snd_card *card = soc_card->snd_card;
2324 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2327 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2330 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2331 * Convienience function to add a list of controls.
2333 * @dai: DAI to add controls to
2334 * @controls: array of controls to add
2335 * @num_controls: number of elements in the array
2337 * Return 0 for success, else error.
2339 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2340 const struct snd_kcontrol_new *controls, int num_controls)
2342 struct snd_card *card = dai->component->card->snd_card;
2344 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2347 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2350 * snd_soc_register_card - Register a card with the ASoC core
2352 * @card: Card to register
2355 int snd_soc_register_card(struct snd_soc_card *card)
2357 if (!card->name || !card->dev)
2360 dev_set_drvdata(card->dev, card);
2362 INIT_LIST_HEAD(&card->widgets);
2363 INIT_LIST_HEAD(&card->paths);
2364 INIT_LIST_HEAD(&card->dapm_list);
2365 INIT_LIST_HEAD(&card->aux_comp_list);
2366 INIT_LIST_HEAD(&card->component_dev_list);
2367 INIT_LIST_HEAD(&card->list);
2368 INIT_LIST_HEAD(&card->rtd_list);
2369 INIT_LIST_HEAD(&card->dapm_dirty);
2370 INIT_LIST_HEAD(&card->dobj_list);
2372 card->instantiated = 0;
2373 mutex_init(&card->mutex);
2374 mutex_init(&card->dapm_mutex);
2375 mutex_init(&card->pcm_mutex);
2376 spin_lock_init(&card->dpcm_lock);
2378 return snd_soc_bind_card(card);
2380 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2383 * snd_soc_unregister_card - Unregister a card with the ASoC core
2385 * @card: Card to unregister
2388 int snd_soc_unregister_card(struct snd_soc_card *card)
2390 mutex_lock(&client_mutex);
2391 snd_soc_unbind_card(card, true);
2392 mutex_unlock(&client_mutex);
2393 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2397 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2400 * Simplify DAI link configuration by removing ".-1" from device names
2401 * and sanitizing names.
2403 static char *fmt_single_name(struct device *dev, int *id)
2405 char *found, name[NAME_SIZE];
2408 if (dev_name(dev) == NULL)
2411 strlcpy(name, dev_name(dev), NAME_SIZE);
2413 /* are we a "%s.%d" name (platform and SPI components) */
2414 found = strstr(name, dev->driver->name);
2417 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2419 /* discard ID from name if ID == -1 */
2421 found[strlen(dev->driver->name)] = '\0';
2425 /* I2C component devices are named "bus-addr" */
2426 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2427 char tmp[NAME_SIZE];
2429 /* create unique ID number from I2C addr and bus */
2430 *id = ((id1 & 0xffff) << 16) + id2;
2432 /* sanitize component name for DAI link creation */
2433 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name,
2435 strlcpy(name, tmp, NAME_SIZE);
2440 return devm_kstrdup(dev, name, GFP_KERNEL);
2444 * Simplify DAI link naming for single devices with multiple DAIs by removing
2445 * any ".-1" and using the DAI name (instead of device name).
2447 static inline char *fmt_multiple_name(struct device *dev,
2448 struct snd_soc_dai_driver *dai_drv)
2450 if (dai_drv->name == NULL) {
2452 "ASoC: error - multiple DAI %s registered with no name\n",
2457 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2460 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2462 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2463 list_del(&dai->list);
2465 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2468 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2470 * @component: The component the DAIs are registered for
2471 * @dai_drv: DAI driver to use for the DAI
2472 * @legacy_dai_naming: if %true, use legacy single-name format;
2473 * if %false, use multiple-name format;
2475 * Topology can use this API to register DAIs when probing a component.
2476 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2477 * will be freed in the component cleanup.
2479 struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2480 struct snd_soc_dai_driver *dai_drv,
2481 bool legacy_dai_naming)
2483 struct device *dev = component->dev;
2484 struct snd_soc_dai *dai;
2486 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2488 lockdep_assert_held(&client_mutex);
2490 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2495 * Back in the old days when we still had component-less DAIs,
2496 * instead of having a static name, component-less DAIs would
2497 * inherit the name of the parent device so it is possible to
2498 * register multiple instances of the DAI. We still need to keep
2499 * the same naming style even though those DAIs are not
2500 * component-less anymore.
2502 if (legacy_dai_naming &&
2503 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2504 dai->name = fmt_single_name(dev, &dai->id);
2506 dai->name = fmt_multiple_name(dev, dai_drv);
2508 dai->id = dai_drv->id;
2510 dai->id = component->num_dai;
2515 dai->component = component;
2517 dai->driver = dai_drv;
2518 if (!dai->driver->ops)
2519 dai->driver->ops = &null_dai_ops;
2521 /* see for_each_component_dais */
2522 list_add_tail(&dai->list, &component->dai_list);
2523 component->num_dai++;
2525 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2530 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2532 * @component: The component for which the DAIs should be unregistered
2534 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2536 struct snd_soc_dai *dai, *_dai;
2538 for_each_component_dais_safe(component, dai, _dai)
2539 snd_soc_unregister_dai(dai);
2543 * snd_soc_register_dais - Register a DAI with the ASoC core
2545 * @component: The component the DAIs are registered for
2546 * @dai_drv: DAI driver to use for the DAIs
2547 * @count: Number of DAIs
2549 static int snd_soc_register_dais(struct snd_soc_component *component,
2550 struct snd_soc_dai_driver *dai_drv,
2553 struct snd_soc_dai *dai;
2557 for (i = 0; i < count; i++) {
2558 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2559 !component->driver->non_legacy_dai_naming);
2569 snd_soc_unregister_dais(component);
2574 static int snd_soc_component_initialize(struct snd_soc_component *component,
2575 const struct snd_soc_component_driver *driver, struct device *dev)
2577 INIT_LIST_HEAD(&component->dai_list);
2578 INIT_LIST_HEAD(&component->dobj_list);
2579 INIT_LIST_HEAD(&component->card_list);
2580 mutex_init(&component->io_mutex);
2582 component->name = fmt_single_name(dev, &component->id);
2583 if (!component->name) {
2584 dev_err(dev, "ASoC: Failed to allocate name\n");
2588 component->dev = dev;
2589 component->driver = driver;
2594 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2596 int val_bytes = regmap_get_val_bytes(component->regmap);
2598 /* Errors are legitimate for non-integer byte multiples */
2600 component->val_bytes = val_bytes;
2603 #ifdef CONFIG_REGMAP
2606 * snd_soc_component_init_regmap() - Initialize regmap instance for the
2608 * @component: The component for which to initialize the regmap instance
2609 * @regmap: The regmap instance that should be used by the component
2611 * This function allows deferred assignment of the regmap instance that is
2612 * associated with the component. Only use this if the regmap instance is not
2613 * yet ready when the component is registered. The function must also be called
2614 * before the first IO attempt of the component.
2616 void snd_soc_component_init_regmap(struct snd_soc_component *component,
2617 struct regmap *regmap)
2619 component->regmap = regmap;
2620 snd_soc_component_setup_regmap(component);
2622 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2625 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the
2627 * @component: The component for which to de-initialize the regmap instance
2629 * Calls regmap_exit() on the regmap instance associated to the component and
2630 * removes the regmap instance from the component.
2632 * This function should only be used if snd_soc_component_init_regmap() was used
2633 * to initialize the regmap instance.
2635 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2637 regmap_exit(component->regmap);
2638 component->regmap = NULL;
2640 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2644 #define ENDIANNESS_MAP(name) \
2645 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2646 static u64 endianness_format_map[] = {
2647 ENDIANNESS_MAP(S16_),
2648 ENDIANNESS_MAP(U16_),
2649 ENDIANNESS_MAP(S24_),
2650 ENDIANNESS_MAP(U24_),
2651 ENDIANNESS_MAP(S32_),
2652 ENDIANNESS_MAP(U32_),
2653 ENDIANNESS_MAP(S24_3),
2654 ENDIANNESS_MAP(U24_3),
2655 ENDIANNESS_MAP(S20_3),
2656 ENDIANNESS_MAP(U20_3),
2657 ENDIANNESS_MAP(S18_3),
2658 ENDIANNESS_MAP(U18_3),
2659 ENDIANNESS_MAP(FLOAT_),
2660 ENDIANNESS_MAP(FLOAT64_),
2661 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2665 * Fix up the DAI formats for endianness: codecs don't actually see
2666 * the endianness of the data but we're using the CPU format
2667 * definitions which do need to include endianness so we ensure that
2668 * codec DAIs always have both big and little endian variants set.
2670 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2674 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2675 if (stream->formats & endianness_format_map[i])
2676 stream->formats |= endianness_format_map[i];
2679 static void snd_soc_try_rebind_card(void)
2681 struct snd_soc_card *card, *c;
2683 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2684 if (!snd_soc_bind_card(card))
2685 list_del(&card->list);
2688 static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2690 struct snd_soc_card *card = component->card;
2692 snd_soc_unregister_dais(component);
2695 snd_soc_unbind_card(card, false);
2697 list_del(&component->list);
2700 int snd_soc_add_component(struct device *dev,
2701 struct snd_soc_component *component,
2702 const struct snd_soc_component_driver *component_driver,
2703 struct snd_soc_dai_driver *dai_drv,
2709 mutex_lock(&client_mutex);
2711 ret = snd_soc_component_initialize(component, component_driver, dev);
2715 if (component_driver->endianness) {
2716 for (i = 0; i < num_dai; i++) {
2717 convert_endianness_formats(&dai_drv[i].playback);
2718 convert_endianness_formats(&dai_drv[i].capture);
2722 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2724 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
2728 if (!component->driver->write && !component->driver->read) {
2729 if (!component->regmap)
2730 component->regmap = dev_get_regmap(component->dev,
2732 if (component->regmap)
2733 snd_soc_component_setup_regmap(component);
2736 /* see for_each_component */
2737 list_add(&component->list, &component_list);
2741 snd_soc_del_component_unlocked(component);
2743 mutex_unlock(&client_mutex);
2746 snd_soc_try_rebind_card();
2750 EXPORT_SYMBOL_GPL(snd_soc_add_component);
2752 int snd_soc_register_component(struct device *dev,
2753 const struct snd_soc_component_driver *component_driver,
2754 struct snd_soc_dai_driver *dai_drv,
2757 struct snd_soc_component *component;
2759 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2763 return snd_soc_add_component(dev, component, component_driver,
2766 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2769 * snd_soc_unregister_component - Unregister all related component
2770 * from the ASoC core
2772 * @dev: The device to unregister
2774 void snd_soc_unregister_component(struct device *dev)
2776 struct snd_soc_component *component;
2778 mutex_lock(&client_mutex);
2780 component = snd_soc_lookup_component_nolocked(dev, NULL);
2784 snd_soc_del_component_unlocked(component);
2786 mutex_unlock(&client_mutex);
2788 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2790 /* Retrieve a card's name from device tree */
2791 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2792 const char *propname)
2794 struct device_node *np;
2798 pr_err("card->dev is not set before calling %s\n", __func__);
2802 np = card->dev->of_node;
2804 ret = of_property_read_string_index(np, propname, 0, &card->name);
2806 * EINVAL means the property does not exist. This is fine providing
2807 * card->name was previously set, which is checked later in
2808 * snd_soc_register_card.
2810 if (ret < 0 && ret != -EINVAL) {
2812 "ASoC: Property '%s' could not be read: %d\n",
2819 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2821 static const struct snd_soc_dapm_widget simple_widgets[] = {
2822 SND_SOC_DAPM_MIC("Microphone", NULL),
2823 SND_SOC_DAPM_LINE("Line", NULL),
2824 SND_SOC_DAPM_HP("Headphone", NULL),
2825 SND_SOC_DAPM_SPK("Speaker", NULL),
2828 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2829 const char *propname)
2831 struct device_node *np = card->dev->of_node;
2832 struct snd_soc_dapm_widget *widgets;
2833 const char *template, *wname;
2834 int i, j, num_widgets, ret;
2836 num_widgets = of_property_count_strings(np, propname);
2837 if (num_widgets < 0) {
2839 "ASoC: Property '%s' does not exist\n", propname);
2842 if (num_widgets & 1) {
2844 "ASoC: Property '%s' length is not even\n", propname);
2850 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2855 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2859 "ASoC: Could not allocate memory for widgets\n");
2863 for (i = 0; i < num_widgets; i++) {
2864 ret = of_property_read_string_index(np, propname,
2868 "ASoC: Property '%s' index %d read error:%d\n",
2869 propname, 2 * i, ret);
2873 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
2874 if (!strncmp(template, simple_widgets[j].name,
2875 strlen(simple_widgets[j].name))) {
2876 widgets[i] = simple_widgets[j];
2881 if (j >= ARRAY_SIZE(simple_widgets)) {
2883 "ASoC: DAPM widget '%s' is not supported\n",
2888 ret = of_property_read_string_index(np, propname,
2893 "ASoC: Property '%s' index %d read error:%d\n",
2894 propname, (2 * i) + 1, ret);
2898 widgets[i].name = wname;
2901 card->of_dapm_widgets = widgets;
2902 card->num_of_dapm_widgets = num_widgets;
2906 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
2908 int snd_soc_of_get_slot_mask(struct device_node *np,
2909 const char *prop_name,
2913 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
2919 for (i = 0; i < val; i++)
2920 if (be32_to_cpup(&of_slot_mask[i]))
2925 EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
2927 int snd_soc_of_parse_tdm_slot(struct device_node *np,
2928 unsigned int *tx_mask,
2929 unsigned int *rx_mask,
2930 unsigned int *slots,
2931 unsigned int *slot_width)
2937 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
2939 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
2941 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
2942 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
2950 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
2951 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
2961 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
2963 void snd_soc_of_parse_node_prefix(struct device_node *np,
2964 struct snd_soc_codec_conf *codec_conf,
2965 struct device_node *of_node,
2966 const char *propname)
2971 ret = of_property_read_string(np, propname, &str);
2973 /* no prefix is not error */
2977 codec_conf->of_node = of_node;
2978 codec_conf->name_prefix = str;
2980 EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
2982 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
2983 const char *propname)
2985 struct device_node *np = card->dev->of_node;
2987 struct snd_soc_dapm_route *routes;
2990 num_routes = of_property_count_strings(np, propname);
2991 if (num_routes < 0 || num_routes & 1) {
2993 "ASoC: Property '%s' does not exist or its length is not even\n",
2999 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3004 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3008 "ASoC: Could not allocate DAPM route table\n");
3012 for (i = 0; i < num_routes; i++) {
3013 ret = of_property_read_string_index(np, propname,
3014 2 * i, &routes[i].sink);
3017 "ASoC: Property '%s' index %d could not be read: %d\n",
3018 propname, 2 * i, ret);
3021 ret = of_property_read_string_index(np, propname,
3022 (2 * i) + 1, &routes[i].source);
3025 "ASoC: Property '%s' index %d could not be read: %d\n",
3026 propname, (2 * i) + 1, ret);
3031 card->num_of_dapm_routes = num_routes;
3032 card->of_dapm_routes = routes;
3036 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3038 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3040 struct device_node **bitclkmaster,
3041 struct device_node **framemaster)
3045 unsigned int format = 0;
3051 } of_fmt_table[] = {
3052 { "i2s", SND_SOC_DAIFMT_I2S },
3053 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3054 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3055 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3056 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3057 { "ac97", SND_SOC_DAIFMT_AC97 },
3058 { "pdm", SND_SOC_DAIFMT_PDM},
3059 { "msb", SND_SOC_DAIFMT_MSB },
3060 { "lsb", SND_SOC_DAIFMT_LSB },
3067 * check "dai-format = xxx"
3068 * or "[prefix]format = xxx"
3069 * SND_SOC_DAIFMT_FORMAT_MASK area
3071 ret = of_property_read_string(np, "dai-format", &str);
3073 snprintf(prop, sizeof(prop), "%sformat", prefix);
3074 ret = of_property_read_string(np, prop, &str);
3077 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3078 if (strcmp(str, of_fmt_table[i].name) == 0) {
3079 format |= of_fmt_table[i].val;
3086 * check "[prefix]continuous-clock"
3087 * SND_SOC_DAIFMT_CLOCK_MASK area
3089 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3090 if (of_property_read_bool(np, prop))
3091 format |= SND_SOC_DAIFMT_CONT;
3093 format |= SND_SOC_DAIFMT_GATED;
3096 * check "[prefix]bitclock-inversion"
3097 * check "[prefix]frame-inversion"
3098 * SND_SOC_DAIFMT_INV_MASK area
3100 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3101 bit = !!of_get_property(np, prop, NULL);
3103 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3104 frame = !!of_get_property(np, prop, NULL);
3106 switch ((bit << 4) + frame) {
3108 format |= SND_SOC_DAIFMT_IB_IF;
3111 format |= SND_SOC_DAIFMT_IB_NF;
3114 format |= SND_SOC_DAIFMT_NB_IF;
3117 /* SND_SOC_DAIFMT_NB_NF is default */
3122 * check "[prefix]bitclock-master"
3123 * check "[prefix]frame-master"
3124 * SND_SOC_DAIFMT_MASTER_MASK area
3126 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3127 bit = !!of_get_property(np, prop, NULL);
3128 if (bit && bitclkmaster)
3129 *bitclkmaster = of_parse_phandle(np, prop, 0);
3131 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3132 frame = !!of_get_property(np, prop, NULL);
3133 if (frame && framemaster)
3134 *framemaster = of_parse_phandle(np, prop, 0);
3136 switch ((bit << 4) + frame) {
3138 format |= SND_SOC_DAIFMT_CBM_CFM;
3141 format |= SND_SOC_DAIFMT_CBM_CFS;
3144 format |= SND_SOC_DAIFMT_CBS_CFM;
3147 format |= SND_SOC_DAIFMT_CBS_CFS;
3153 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3155 int snd_soc_get_dai_id(struct device_node *ep)
3157 struct snd_soc_component *component;
3158 struct snd_soc_dai_link_component dlc;
3161 dlc.of_node = of_graph_get_port_parent(ep);
3164 * For example HDMI case, HDMI has video/sound port,
3165 * but ALSA SoC needs sound port number only.
3166 * Thus counting HDMI DT port/endpoint doesn't work.
3167 * Then, it should have .of_xlate_dai_id
3170 mutex_lock(&client_mutex);
3171 component = soc_find_component(&dlc);
3173 ret = snd_soc_component_of_xlate_dai_id(component, ep);
3174 mutex_unlock(&client_mutex);
3176 of_node_put(dlc.of_node);
3180 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3182 int snd_soc_get_dai_name(struct of_phandle_args *args,
3183 const char **dai_name)
3185 struct snd_soc_component *pos;
3186 struct device_node *component_of_node;
3187 int ret = -EPROBE_DEFER;
3189 mutex_lock(&client_mutex);
3190 for_each_component(pos) {
3191 component_of_node = soc_component_to_node(pos);
3193 if (component_of_node != args->np)
3196 ret = snd_soc_component_of_xlate_dai_name(pos, args, dai_name);
3197 if (ret == -ENOTSUPP) {
3198 struct snd_soc_dai *dai;
3201 switch (args->args_count) {
3203 id = 0; /* same as dai_drv[0] */
3213 if (id < 0 || id >= pos->num_dai) {
3220 /* find target DAI */
3221 for_each_component_dais(pos, dai) {
3227 *dai_name = dai->driver->name;
3229 *dai_name = pos->name;
3234 mutex_unlock(&client_mutex);
3237 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3239 int snd_soc_of_get_dai_name(struct device_node *of_node,
3240 const char **dai_name)
3242 struct of_phandle_args args;
3245 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3246 "#sound-dai-cells", 0, &args);
3250 ret = snd_soc_get_dai_name(&args, dai_name);
3252 of_node_put(args.np);
3256 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3259 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3260 * @dai_link: DAI link
3262 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3264 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3266 struct snd_soc_dai_link_component *component;
3269 for_each_link_codecs(dai_link, index, component) {
3270 if (!component->of_node)
3272 of_node_put(component->of_node);
3273 component->of_node = NULL;
3276 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3279 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3281 * @of_node: Device node
3282 * @dai_link: DAI link
3284 * Builds an array of CODEC DAI components from the DAI link property
3286 * The array is set in the DAI link and the number of DAIs is set accordingly.
3287 * The device nodes in the array (of_node) must be dereferenced by calling
3288 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3290 * Returns 0 for success
3292 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3293 struct device_node *of_node,
3294 struct snd_soc_dai_link *dai_link)
3296 struct of_phandle_args args;
3297 struct snd_soc_dai_link_component *component;
3299 int index, num_codecs, ret;
3301 /* Count the number of CODECs */
3303 num_codecs = of_count_phandle_with_args(of_node, name,
3304 "#sound-dai-cells");
3305 if (num_codecs <= 0) {
3306 if (num_codecs == -ENOENT)
3307 dev_err(dev, "No 'sound-dai' property\n");
3309 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3312 component = devm_kcalloc(dev,
3313 num_codecs, sizeof(*component),
3317 dai_link->codecs = component;
3318 dai_link->num_codecs = num_codecs;
3320 /* Parse the list */
3321 for_each_link_codecs(dai_link, index, component) {
3322 ret = of_parse_phandle_with_args(of_node, name,
3327 component->of_node = args.np;
3328 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3334 snd_soc_of_put_dai_link_codecs(dai_link);
3335 dai_link->codecs = NULL;
3336 dai_link->num_codecs = 0;
3339 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3341 static int __init snd_soc_init(void)
3343 snd_soc_debugfs_init();
3344 snd_soc_util_init();
3346 return platform_driver_register(&soc_driver);
3348 module_init(snd_soc_init);
3350 static void __exit snd_soc_exit(void)
3352 snd_soc_util_exit();
3353 snd_soc_debugfs_exit();
3355 platform_driver_unregister(&soc_driver);
3357 module_exit(snd_soc_exit);
3359 /* Module information */
3360 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3361 MODULE_DESCRIPTION("ALSA SoC Core");
3362 MODULE_LICENSE("GPL");
3363 MODULE_ALIAS("platform:soc-audio");