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 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
393 const char *dai_link, int stream)
395 struct snd_soc_pcm_runtime *rtd;
397 for_each_card_rtds(card, rtd) {
398 if (rtd->dai_link->no_pcm &&
399 !strcmp(rtd->dai_link->name, dai_link))
400 return rtd->pcm->streams[stream].substream;
402 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
405 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
407 static const struct snd_soc_ops null_snd_soc_ops;
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);
423 * we don't need to call kfree() for rtd->dev
425 * soc_release_rtd_dev()
427 * We don't need rtd->dev NULL check, because
428 * it is alloced *before* rtd.
430 * soc_new_pcm_runtime()
432 device_unregister(rtd->dev);
435 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
436 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
438 struct snd_soc_pcm_runtime *rtd;
445 dev = kzalloc(sizeof(struct device), GFP_KERNEL);
449 dev->parent = card->dev;
450 dev->release = soc_release_rtd_dev;
451 dev->groups = soc_dev_attr_groups;
453 dev_set_name(dev, "%s", dai_link->name);
455 ret = device_register(dev);
457 put_device(dev); /* soc_release_rtd_dev */
464 rtd = devm_kzalloc(dev, sizeof(*rtd), GFP_KERNEL);
469 dev_set_drvdata(dev, rtd);
472 * for rtd->codec_dais
474 rtd->codec_dais = devm_kcalloc(dev, dai_link->num_codecs,
475 sizeof(struct snd_soc_dai *),
477 if (!rtd->codec_dais)
481 * rtd remaining settings
483 INIT_LIST_HEAD(&rtd->component_list);
484 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
485 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
486 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
487 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
490 rtd->dai_link = dai_link;
491 if (!rtd->dai_link->ops)
492 rtd->dai_link->ops = &null_snd_soc_ops;
494 /* see for_each_card_rtds */
495 list_add_tail(&rtd->list, &card->rtd_list);
496 rtd->num = card->num_rtd;
502 soc_free_pcm_runtime(rtd);
506 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
507 const char *dai_link)
509 struct snd_soc_pcm_runtime *rtd;
511 for_each_card_rtds(card, rtd) {
512 if (!strcmp(rtd->dai_link->name, dai_link))
515 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
518 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
520 static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
522 struct snd_soc_pcm_runtime *rtd;
524 for_each_card_rtds(card, rtd)
525 flush_delayed_work(&rtd->delayed_work);
528 #ifdef CONFIG_PM_SLEEP
529 /* powers down audio subsystem for suspend */
530 int snd_soc_suspend(struct device *dev)
532 struct snd_soc_card *card = dev_get_drvdata(dev);
533 struct snd_soc_component *component;
534 struct snd_soc_pcm_runtime *rtd;
537 /* If the card is not initialized yet there is nothing to do */
538 if (!card->instantiated)
542 * Due to the resume being scheduled into a workqueue we could
543 * suspend before that's finished - wait for it to complete.
545 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
547 /* we're going to block userspace touching us until resume completes */
548 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
550 /* mute any active DACs */
551 for_each_card_rtds(card, rtd) {
552 struct snd_soc_dai *dai;
554 if (rtd->dai_link->ignore_suspend)
557 for_each_rtd_codec_dai(rtd, i, dai) {
558 if (dai->playback_active)
559 snd_soc_dai_digital_mute(dai, 1,
560 SNDRV_PCM_STREAM_PLAYBACK);
564 /* suspend all pcms */
565 for_each_card_rtds(card, rtd) {
566 if (rtd->dai_link->ignore_suspend)
569 snd_pcm_suspend_all(rtd->pcm);
572 if (card->suspend_pre)
573 card->suspend_pre(card);
575 for_each_card_rtds(card, rtd) {
576 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
578 if (rtd->dai_link->ignore_suspend)
581 if (!cpu_dai->driver->bus_control)
582 snd_soc_dai_suspend(cpu_dai);
585 /* close any waiting streams */
586 snd_soc_flush_all_delayed_work(card);
588 for_each_card_rtds(card, rtd) {
590 if (rtd->dai_link->ignore_suspend)
593 snd_soc_dapm_stream_event(rtd,
594 SNDRV_PCM_STREAM_PLAYBACK,
595 SND_SOC_DAPM_STREAM_SUSPEND);
597 snd_soc_dapm_stream_event(rtd,
598 SNDRV_PCM_STREAM_CAPTURE,
599 SND_SOC_DAPM_STREAM_SUSPEND);
602 /* Recheck all endpoints too, their state is affected by suspend */
603 dapm_mark_endpoints_dirty(card);
604 snd_soc_dapm_sync(&card->dapm);
606 /* suspend all COMPONENTs */
607 for_each_card_components(card, component) {
608 struct snd_soc_dapm_context *dapm =
609 snd_soc_component_get_dapm(component);
612 * If there are paths active then the COMPONENT will be held
613 * with bias _ON and should not be suspended.
615 if (!snd_soc_component_is_suspended(component)) {
616 switch (snd_soc_dapm_get_bias_level(dapm)) {
617 case SND_SOC_BIAS_STANDBY:
619 * If the COMPONENT is capable of idle
620 * bias off then being in STANDBY
621 * means it's doing something,
622 * otherwise fall through.
624 if (dapm->idle_bias_off) {
625 dev_dbg(component->dev,
626 "ASoC: idle_bias_off CODEC on over suspend\n");
631 case SND_SOC_BIAS_OFF:
632 snd_soc_component_suspend(component);
633 if (component->regmap)
634 regcache_mark_dirty(component->regmap);
635 /* deactivate pins to sleep state */
636 pinctrl_pm_select_sleep_state(component->dev);
639 dev_dbg(component->dev,
640 "ASoC: COMPONENT is on over suspend\n");
646 for_each_card_rtds(card, rtd) {
647 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
649 if (rtd->dai_link->ignore_suspend)
652 if (cpu_dai->driver->bus_control)
653 snd_soc_dai_suspend(cpu_dai);
655 /* deactivate pins to sleep state */
656 pinctrl_pm_select_sleep_state(cpu_dai->dev);
659 if (card->suspend_post)
660 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_pcm_runtime *rtd;
676 struct snd_soc_component *component;
680 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
681 * so userspace apps are blocked from touching us
684 dev_dbg(card->dev, "ASoC: starting resume work\n");
686 /* Bring us up into D2 so that DAPM starts enabling things */
687 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
689 if (card->resume_pre)
690 card->resume_pre(card);
692 /* resume control bus DAIs */
693 for_each_card_rtds(card, rtd) {
694 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
696 if (rtd->dai_link->ignore_suspend)
699 if (cpu_dai->driver->bus_control)
700 snd_soc_dai_resume(cpu_dai);
703 for_each_card_components(card, component) {
704 if (snd_soc_component_is_suspended(component))
705 snd_soc_component_resume(component);
708 for_each_card_rtds(card, rtd) {
710 if (rtd->dai_link->ignore_suspend)
713 snd_soc_dapm_stream_event(rtd,
714 SNDRV_PCM_STREAM_PLAYBACK,
715 SND_SOC_DAPM_STREAM_RESUME);
717 snd_soc_dapm_stream_event(rtd,
718 SNDRV_PCM_STREAM_CAPTURE,
719 SND_SOC_DAPM_STREAM_RESUME);
722 /* unmute any active DACs */
723 for_each_card_rtds(card, rtd) {
724 struct snd_soc_dai *dai;
726 if (rtd->dai_link->ignore_suspend)
729 for_each_rtd_codec_dai(rtd, i, dai) {
730 if (dai->playback_active)
731 snd_soc_dai_digital_mute(dai, 0,
732 SNDRV_PCM_STREAM_PLAYBACK);
736 for_each_card_rtds(card, rtd) {
737 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
739 if (rtd->dai_link->ignore_suspend)
742 if (!cpu_dai->driver->bus_control)
743 snd_soc_dai_resume(cpu_dai);
746 if (card->resume_post)
747 card->resume_post(card);
749 dev_dbg(card->dev, "ASoC: resume work completed\n");
751 /* Recheck all endpoints too, their state is affected by suspend */
752 dapm_mark_endpoints_dirty(card);
753 snd_soc_dapm_sync(&card->dapm);
755 /* userspace can access us now we are back as we were before */
756 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
759 /* powers up audio subsystem after a suspend */
760 int snd_soc_resume(struct device *dev)
762 struct snd_soc_card *card = dev_get_drvdata(dev);
763 bool bus_control = false;
764 struct snd_soc_pcm_runtime *rtd;
765 struct snd_soc_dai *codec_dai;
768 /* If the card is not initialized yet there is nothing to do */
769 if (!card->instantiated)
772 /* activate pins from sleep state */
773 for_each_card_rtds(card, rtd) {
774 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
777 pinctrl_pm_select_default_state(cpu_dai->dev);
779 for_each_rtd_codec_dai(rtd, i, codec_dai) {
780 if (codec_dai->active)
781 pinctrl_pm_select_default_state(codec_dai->dev);
786 * DAIs that also act as the control bus master might have other drivers
787 * hanging off them so need to resume immediately. Other drivers don't
788 * have that problem and may take a substantial amount of time to resume
789 * due to I/O costs and anti-pop so handle them out of line.
791 for_each_card_rtds(card, rtd) {
792 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
794 bus_control |= cpu_dai->driver->bus_control;
797 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
798 soc_resume_deferred(&card->deferred_resume_work);
800 dev_dbg(dev, "ASoC: Scheduling resume work\n");
801 if (!schedule_work(&card->deferred_resume_work))
802 dev_err(dev, "ASoC: resume work item may be lost\n");
807 EXPORT_SYMBOL_GPL(snd_soc_resume);
809 static void soc_resume_init(struct snd_soc_card *card)
811 /* deferred resume work */
812 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
815 #define snd_soc_suspend NULL
816 #define snd_soc_resume NULL
817 static inline void soc_resume_init(struct snd_soc_card *card)
822 static const struct snd_soc_dai_ops null_dai_ops = {
825 static struct device_node
826 *soc_component_to_node(struct snd_soc_component *component)
828 struct device_node *of_node;
830 of_node = component->dev->of_node;
831 if (!of_node && component->dev->parent)
832 of_node = component->dev->parent->of_node;
837 static int snd_soc_is_matching_component(
838 const struct snd_soc_dai_link_component *dlc,
839 struct snd_soc_component *component)
841 struct device_node *component_of_node;
846 component_of_node = soc_component_to_node(component);
848 if (dlc->of_node && component_of_node != dlc->of_node)
850 if (dlc->name && strcmp(component->name, dlc->name))
856 static struct snd_soc_component *soc_find_component(
857 const struct snd_soc_dai_link_component *dlc)
859 struct snd_soc_component *component;
861 lockdep_assert_held(&client_mutex);
866 * It returns *1st* found component, but some driver
867 * has few components by same of_node/name
869 * CPU component and generic DMAEngine component
871 for_each_component(component)
872 if (snd_soc_is_matching_component(dlc, component))
879 * snd_soc_find_dai - Find a registered DAI
881 * @dlc: name of the DAI or the DAI driver and optional component info to match
883 * This function will search all registered components and their DAIs to
884 * find the DAI of the same name. The component's of_node and name
885 * should also match if being specified.
887 * Return: pointer of DAI, or NULL if not found.
889 struct snd_soc_dai *snd_soc_find_dai(
890 const struct snd_soc_dai_link_component *dlc)
892 struct snd_soc_component *component;
893 struct snd_soc_dai *dai;
895 lockdep_assert_held(&client_mutex);
897 /* Find CPU DAI from registered DAIs */
898 for_each_component(component) {
899 if (!snd_soc_is_matching_component(dlc, component))
901 for_each_component_dais(component, dai) {
902 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
903 && (!dai->driver->name
904 || strcmp(dai->driver->name, dlc->dai_name)))
913 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
916 * snd_soc_find_dai_link - Find a DAI link
919 * @id: DAI link ID to match
920 * @name: DAI link name to match, optional
921 * @stream_name: DAI link stream name to match, optional
923 * This function will search all existing DAI links of the soc card to
924 * find the link of the same ID. Since DAI links may not have their
925 * unique ID, so name and stream name should also match if being
928 * Return: pointer of DAI link, or NULL if not found.
930 struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
931 int id, const char *name,
932 const char *stream_name)
934 struct snd_soc_dai_link *link;
936 lockdep_assert_held(&client_mutex);
938 for_each_card_links(card, link) {
942 if (name && (!link->name || strcmp(name, link->name)))
945 if (stream_name && (!link->stream_name
946 || strcmp(stream_name, link->stream_name)))
954 EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);
956 static int soc_dai_link_sanity_check(struct snd_soc_card *card,
957 struct snd_soc_dai_link *link)
960 struct snd_soc_dai_link_component *codec, *platform;
962 for_each_link_codecs(link, i, codec) {
964 * Codec must be specified by 1 of name or OF node,
965 * not both or neither.
967 if (!!codec->name == !!codec->of_node) {
968 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
973 /* Codec DAI name must be specified */
974 if (!codec->dai_name) {
975 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
981 * Defer card registration if codec component is not added to
984 if (!soc_find_component(codec))
985 return -EPROBE_DEFER;
988 for_each_link_platforms(link, i, platform) {
990 * Platform may be specified by either name or OF node, but it
991 * can be left unspecified, then no components will be inserted
994 if (!!platform->name == !!platform->of_node) {
996 "ASoC: Neither/both platform name/of_node are set for %s\n",
1002 * Defer card registration if platform component is not added to
1005 if (!soc_find_component(platform))
1006 return -EPROBE_DEFER;
1010 if (link->num_cpus > 1) {
1012 "ASoC: multi cpu is not yet supported %s\n",
1018 * CPU device may be specified by either name or OF node, but
1019 * can be left unspecified, and will be matched based on DAI
1022 if (link->cpus->name && link->cpus->of_node) {
1024 "ASoC: Neither/both cpu name/of_node are set for %s\n",
1030 * Defer card registration if cpu dai component is not added to
1033 if ((link->cpus->of_node || link->cpus->name) &&
1034 !soc_find_component(link->cpus))
1035 return -EPROBE_DEFER;
1038 * At least one of CPU DAI name or CPU device name/node must be
1041 if (!link->cpus->dai_name &&
1042 !(link->cpus->name || link->cpus->of_node)) {
1044 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
1053 * snd_soc_remove_dai_link - Remove a DAI link from the list
1054 * @card: The ASoC card that owns the link
1055 * @dai_link: The DAI link to remove
1057 * This function removes a DAI link from the ASoC card's link list.
1059 * For DAI links previously added by topology, topology should
1060 * remove them by using the dobj embedded in the link.
1062 void snd_soc_remove_dai_link(struct snd_soc_card *card,
1063 struct snd_soc_dai_link *dai_link)
1065 struct snd_soc_pcm_runtime *rtd;
1067 lockdep_assert_held(&client_mutex);
1070 * Notify the machine driver for extra destruction
1072 if (card->remove_dai_link)
1073 card->remove_dai_link(card, dai_link);
1075 list_del(&dai_link->list);
1077 rtd = snd_soc_get_pcm_runtime(card, dai_link->name);
1079 soc_free_pcm_runtime(rtd);
1081 EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);
1084 * snd_soc_add_dai_link - Add a DAI link dynamically
1085 * @card: The ASoC card to which the DAI link is added
1086 * @dai_link: The new DAI link to add
1088 * This function adds a DAI link to the ASoC card's link list.
1090 * Note: Topology can use this API to add DAI links when probing the
1091 * topology component. And machine drivers can still define static
1092 * DAI links in dai_link array.
1094 int snd_soc_add_dai_link(struct snd_soc_card *card,
1095 struct snd_soc_dai_link *dai_link)
1097 struct snd_soc_pcm_runtime *rtd;
1098 struct snd_soc_dai_link_component *codec, *platform;
1099 struct snd_soc_component *component;
1102 lockdep_assert_held(&client_mutex);
1105 * Notify the machine driver for extra initialization
1107 if (card->add_dai_link)
1108 card->add_dai_link(card, dai_link);
1110 if (dai_link->ignore)
1113 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1115 ret = soc_dai_link_sanity_check(card, dai_link);
1119 rtd = soc_new_pcm_runtime(card, dai_link);
1123 /* FIXME: we need multi CPU support in the future */
1124 rtd->cpu_dai = snd_soc_find_dai(dai_link->cpus);
1125 if (!rtd->cpu_dai) {
1126 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1127 dai_link->cpus->dai_name);
1130 snd_soc_rtdcom_add(rtd, rtd->cpu_dai->component);
1132 /* Find CODEC from registered CODECs */
1133 rtd->num_codecs = dai_link->num_codecs;
1134 for_each_link_codecs(dai_link, i, codec) {
1135 rtd->codec_dais[i] = snd_soc_find_dai(codec);
1136 if (!rtd->codec_dais[i]) {
1137 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
1142 snd_soc_rtdcom_add(rtd, rtd->codec_dais[i]->component);
1145 /* Single codec links expect codec and codec_dai in runtime data */
1146 rtd->codec_dai = rtd->codec_dais[0];
1148 /* Find PLATFORM from registered PLATFORMs */
1149 for_each_link_platforms(dai_link, i, platform) {
1150 for_each_component(component) {
1151 if (!snd_soc_is_matching_component(platform, component))
1154 snd_soc_rtdcom_add(rtd, component);
1158 /* see for_each_card_links */
1159 list_add_tail(&dai_link->list, &card->dai_link_list);
1164 soc_free_pcm_runtime(rtd);
1165 return -EPROBE_DEFER;
1167 EXPORT_SYMBOL_GPL(snd_soc_add_dai_link);
1169 static void soc_set_of_name_prefix(struct snd_soc_component *component)
1171 struct device_node *of_node = soc_component_to_node(component);
1175 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1177 component->name_prefix = str;
1180 static void soc_set_name_prefix(struct snd_soc_card *card,
1181 struct snd_soc_component *component)
1185 for (i = 0; i < card->num_configs && card->codec_conf; i++) {
1186 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1187 struct device_node *of_node = soc_component_to_node(component);
1189 if (map->of_node && of_node != map->of_node)
1191 if (map->dev_name && strcmp(component->name, map->dev_name))
1193 component->name_prefix = map->name_prefix;
1198 * If there is no configuration table or no match in the table,
1199 * check if a prefix is provided in the node
1201 soc_set_of_name_prefix(component);
1204 static void soc_remove_component(struct snd_soc_component *component,
1208 if (!component->card)
1212 snd_soc_component_remove(component);
1214 /* For framework level robustness */
1215 snd_soc_component_set_jack(component, NULL, NULL);
1217 list_del_init(&component->card_list);
1218 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1219 soc_cleanup_component_debugfs(component);
1220 component->card = NULL;
1221 snd_soc_component_module_put_when_remove(component);
1224 static int soc_probe_component(struct snd_soc_card *card,
1225 struct snd_soc_component *component)
1227 struct snd_soc_dapm_context *dapm =
1228 snd_soc_component_get_dapm(component);
1229 struct snd_soc_dai *dai;
1233 if (!strcmp(component->name, "snd-soc-dummy"))
1236 if (component->card) {
1237 if (component->card != card) {
1238 dev_err(component->dev,
1239 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1240 card->name, component->card->name);
1246 ret = snd_soc_component_module_get_when_probe(component);
1250 component->card = card;
1251 soc_set_name_prefix(card, component);
1253 soc_init_component_debugfs(component);
1255 snd_soc_dapm_init(dapm, card, component);
1257 ret = snd_soc_dapm_new_controls(dapm,
1258 component->driver->dapm_widgets,
1259 component->driver->num_dapm_widgets);
1262 dev_err(component->dev,
1263 "Failed to create new controls %d\n", ret);
1267 for_each_component_dais(component, dai) {
1268 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1270 dev_err(component->dev,
1271 "Failed to create DAI widgets %d\n", ret);
1276 ret = snd_soc_component_probe(component);
1278 dev_err(component->dev,
1279 "ASoC: failed to probe component %d\n", ret);
1282 WARN(dapm->idle_bias_off &&
1283 dapm->bias_level != SND_SOC_BIAS_OFF,
1284 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1288 /* machine specific init */
1289 if (component->init) {
1290 ret = component->init(component);
1292 dev_err(component->dev,
1293 "Failed to do machine specific init %d\n", ret);
1298 ret = snd_soc_add_component_controls(component,
1299 component->driver->controls,
1300 component->driver->num_controls);
1304 ret = snd_soc_dapm_add_routes(dapm,
1305 component->driver->dapm_routes,
1306 component->driver->num_dapm_routes);
1310 /* see for_each_card_components */
1311 list_add(&component->card_list, &card->component_dev_list);
1315 soc_remove_component(component, probed);
1320 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1324 if (!dai || !dai->probed || !dai->driver ||
1325 dai->driver->remove_order != order)
1328 err = snd_soc_dai_remove(dai);
1331 "ASoC: failed to remove %s: %d\n",
1337 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1342 dai->driver->probe_order != order)
1345 ret = snd_soc_dai_probe(dai);
1347 dev_err(dai->dev, "ASoC: failed to probe DAI %s: %d\n",
1357 static void soc_remove_link_dais(struct snd_soc_card *card)
1360 struct snd_soc_dai *codec_dai;
1361 struct snd_soc_pcm_runtime *rtd;
1364 for_each_comp_order(order) {
1365 for_each_card_rtds(card, rtd) {
1366 /* remove the CODEC DAI */
1367 for_each_rtd_codec_dai(rtd, i, codec_dai)
1368 soc_remove_dai(codec_dai, order);
1370 soc_remove_dai(rtd->cpu_dai, order);
1375 static int soc_probe_link_dais(struct snd_soc_card *card)
1377 struct snd_soc_dai *codec_dai;
1378 struct snd_soc_pcm_runtime *rtd;
1381 for_each_comp_order(order) {
1382 for_each_card_rtds(card, rtd) {
1385 "ASoC: probe %s dai link %d late %d\n",
1386 card->name, rtd->num, order);
1388 ret = soc_probe_dai(rtd->cpu_dai, order);
1392 /* probe the CODEC DAI */
1393 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1394 ret = soc_probe_dai(codec_dai, order);
1404 static void soc_remove_link_components(struct snd_soc_card *card)
1406 struct snd_soc_component *component;
1407 struct snd_soc_pcm_runtime *rtd;
1408 struct snd_soc_rtdcom_list *rtdcom;
1411 for_each_comp_order(order) {
1412 for_each_card_rtds(card, rtd) {
1413 for_each_rtd_components(rtd, rtdcom, component) {
1414 if (component->driver->remove_order != order)
1417 soc_remove_component(component, 1);
1423 static int soc_probe_link_components(struct snd_soc_card *card)
1425 struct snd_soc_component *component;
1426 struct snd_soc_pcm_runtime *rtd;
1427 struct snd_soc_rtdcom_list *rtdcom;
1430 for_each_comp_order(order) {
1431 for_each_card_rtds(card, rtd) {
1432 for_each_rtd_components(rtd, rtdcom, component) {
1433 if (component->driver->probe_order != order)
1436 ret = soc_probe_component(card, component);
1446 void snd_soc_disconnect_sync(struct device *dev)
1448 struct snd_soc_component *component =
1449 snd_soc_lookup_component(dev, NULL);
1451 if (!component || !component->card)
1454 snd_card_disconnect_sync(component->card->snd_card);
1456 EXPORT_SYMBOL_GPL(snd_soc_disconnect_sync);
1458 static int soc_link_dai_pcm_new(struct snd_soc_dai **dais, int num_dais,
1459 struct snd_soc_pcm_runtime *rtd)
1463 for (i = 0; i < num_dais; ++i) {
1464 struct snd_soc_dai_driver *drv = dais[i]->driver;
1467 ret = drv->pcm_new(rtd, dais[i]);
1469 dev_err(dais[i]->dev,
1470 "ASoC: Failed to bind %s with pcm device\n",
1479 static int soc_link_init(struct snd_soc_card *card,
1480 struct snd_soc_pcm_runtime *rtd)
1482 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1483 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1484 struct snd_soc_rtdcom_list *rtdcom;
1485 struct snd_soc_component *component;
1488 /* set default power off timeout */
1489 rtd->pmdown_time = pmdown_time;
1491 /* do machine specific initialization */
1492 if (dai_link->init) {
1493 ret = dai_link->init(rtd);
1495 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1496 dai_link->name, ret);
1501 if (dai_link->dai_fmt) {
1502 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1507 /* add DPCM sysfs entries */
1508 soc_dpcm_debugfs_add(rtd);
1513 * most drivers will register their PCMs using DAI link ordering but
1514 * topology based drivers can use the DAI link id field to set PCM
1515 * device number and then use rtd + a base offset of the BEs.
1517 for_each_rtd_components(rtd, rtdcom, component) {
1518 if (!component->driver->use_dai_pcm_id)
1521 if (rtd->dai_link->no_pcm)
1522 num += component->driver->be_pcm_base;
1524 num = rtd->dai_link->id;
1527 /* create compress_device if possible */
1528 ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1529 if (ret != -ENOTSUPP) {
1531 dev_err(card->dev, "ASoC: can't create compress %s\n",
1532 dai_link->stream_name);
1536 /* create the pcm */
1537 ret = soc_new_pcm(rtd, num);
1539 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1540 dai_link->stream_name, ret);
1543 ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd);
1546 ret = soc_link_dai_pcm_new(rtd->codec_dais,
1547 rtd->num_codecs, rtd);
1551 static void soc_unbind_aux_dev(struct snd_soc_card *card)
1553 struct snd_soc_component *component, *_component;
1555 for_each_card_auxs_safe(card, component, _component) {
1556 component->init = NULL;
1557 list_del(&component->card_aux_list);
1561 static int soc_bind_aux_dev(struct snd_soc_card *card)
1563 struct snd_soc_component *component;
1564 struct snd_soc_aux_dev *aux;
1567 for_each_card_pre_auxs(card, i, aux) {
1568 /* codecs, usually analog devices */
1569 component = soc_find_component(&aux->dlc);
1571 return -EPROBE_DEFER;
1573 component->init = aux->init;
1574 /* see for_each_card_auxs */
1575 list_add(&component->card_aux_list, &card->aux_comp_list);
1580 static int soc_probe_aux_devices(struct snd_soc_card *card)
1582 struct snd_soc_component *component;
1586 for_each_comp_order(order) {
1587 for_each_card_auxs(card, component) {
1588 if (component->driver->probe_order != order)
1591 ret = soc_probe_component(card, component);
1600 static void soc_remove_aux_devices(struct snd_soc_card *card)
1602 struct snd_soc_component *comp, *_comp;
1605 for_each_comp_order(order) {
1606 for_each_card_auxs_safe(card, comp, _comp) {
1607 if (comp->driver->remove_order == order)
1608 soc_remove_component(comp, 1);
1614 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1615 * @rtd: The runtime for which the DAI link format should be changed
1616 * @dai_fmt: The new DAI link format
1618 * This function updates the DAI link format for all DAIs connected to the DAI
1619 * link for the specified runtime.
1621 * Note: For setups with a static format set the dai_fmt field in the
1622 * corresponding snd_dai_link struct instead of using this function.
1624 * Returns 0 on success, otherwise a negative error code.
1626 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1627 unsigned int dai_fmt)
1629 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1630 struct snd_soc_dai *codec_dai;
1634 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1635 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1636 if (ret != 0 && ret != -ENOTSUPP) {
1637 dev_warn(codec_dai->dev,
1638 "ASoC: Failed to set DAI format: %d\n", ret);
1644 * Flip the polarity for the "CPU" end of a CODEC<->CODEC link
1645 * the component which has non_legacy_dai_naming is Codec
1647 if (cpu_dai->component->driver->non_legacy_dai_naming) {
1648 unsigned int inv_dai_fmt;
1650 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1651 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1652 case SND_SOC_DAIFMT_CBM_CFM:
1653 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1655 case SND_SOC_DAIFMT_CBM_CFS:
1656 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1658 case SND_SOC_DAIFMT_CBS_CFM:
1659 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1661 case SND_SOC_DAIFMT_CBS_CFS:
1662 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1666 dai_fmt = inv_dai_fmt;
1669 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1670 if (ret != 0 && ret != -ENOTSUPP) {
1671 dev_warn(cpu_dai->dev,
1672 "ASoC: Failed to set DAI format: %d\n", ret);
1678 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1682 * Trim special characters, and replace '-' with '_' since '-' is used to
1683 * separate different DMI fields in the card long name. Only number and
1684 * alphabet characters and a few separator characters are kept.
1686 static void cleanup_dmi_name(char *name)
1690 for (i = 0; name[i]; i++) {
1691 if (isalnum(name[i]) || (name[i] == '.')
1692 || (name[i] == '_'))
1693 name[j++] = name[i];
1694 else if (name[i] == '-')
1702 * Check if a DMI field is valid, i.e. not containing any string
1703 * in the black list.
1705 static int is_dmi_valid(const char *field)
1709 while (dmi_blacklist[i]) {
1710 if (strstr(field, dmi_blacklist[i]))
1719 * snd_soc_set_dmi_name() - Register DMI names to card
1720 * @card: The card to register DMI names
1721 * @flavour: The flavour "differentiator" for the card amongst its peers.
1723 * An Intel machine driver may be used by many different devices but are
1724 * difficult for userspace to differentiate, since machine drivers ususally
1725 * use their own name as the card short name and leave the card long name
1726 * blank. To differentiate such devices and fix bugs due to lack of
1727 * device-specific configurations, this function allows DMI info to be used
1728 * as the sound card long name, in the format of
1729 * "vendor-product-version-board"
1730 * (Character '-' is used to separate different DMI fields here).
1731 * This will help the user space to load the device-specific Use Case Manager
1732 * (UCM) configurations for the card.
1734 * Possible card long names may be:
1735 * DellInc.-XPS139343-01-0310JH
1736 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1737 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1739 * This function also supports flavoring the card longname to provide
1740 * the extra differentiation, like "vendor-product-version-board-flavor".
1742 * We only keep number and alphabet characters and a few separator characters
1743 * in the card long name since UCM in the user space uses the card long names
1744 * as card configuration directory names and AudoConf cannot support special
1745 * charactors like SPACE.
1747 * Returns 0 on success, otherwise a negative error code.
1749 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1751 const char *vendor, *product, *product_version, *board;
1752 size_t longname_buf_size = sizeof(card->snd_card->longname);
1755 if (card->long_name)
1756 return 0; /* long name already set by driver or from DMI */
1758 /* make up dmi long name as: vendor.product.version.board */
1759 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1760 if (!vendor || !is_dmi_valid(vendor)) {
1761 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1765 snprintf(card->dmi_longname, sizeof(card->snd_card->longname),
1767 cleanup_dmi_name(card->dmi_longname);
1769 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1770 if (product && is_dmi_valid(product)) {
1771 len = strlen(card->dmi_longname);
1772 snprintf(card->dmi_longname + len,
1773 longname_buf_size - len,
1776 len++; /* skip the separator "-" */
1777 if (len < longname_buf_size)
1778 cleanup_dmi_name(card->dmi_longname + len);
1781 * some vendors like Lenovo may only put a self-explanatory
1782 * name in the product version field
1784 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1785 if (product_version && is_dmi_valid(product_version)) {
1786 len = strlen(card->dmi_longname);
1787 snprintf(card->dmi_longname + len,
1788 longname_buf_size - len,
1789 "-%s", product_version);
1792 if (len < longname_buf_size)
1793 cleanup_dmi_name(card->dmi_longname + len);
1797 board = dmi_get_system_info(DMI_BOARD_NAME);
1798 if (board && is_dmi_valid(board)) {
1799 len = strlen(card->dmi_longname);
1800 snprintf(card->dmi_longname + len,
1801 longname_buf_size - len,
1805 if (len < longname_buf_size)
1806 cleanup_dmi_name(card->dmi_longname + len);
1807 } else if (!product) {
1808 /* fall back to using legacy name */
1809 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1813 /* Add flavour to dmi long name */
1815 len = strlen(card->dmi_longname);
1816 snprintf(card->dmi_longname + len,
1817 longname_buf_size - len,
1821 if (len < longname_buf_size)
1822 cleanup_dmi_name(card->dmi_longname + len);
1825 /* set the card long name */
1826 card->long_name = card->dmi_longname;
1830 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1831 #endif /* CONFIG_DMI */
1833 static void soc_check_tplg_fes(struct snd_soc_card *card)
1835 struct snd_soc_component *component;
1836 const struct snd_soc_component_driver *comp_drv;
1837 struct snd_soc_dai_link *dai_link;
1840 for_each_component(component) {
1842 /* does this component override BEs ? */
1843 if (!component->driver->ignore_machine)
1846 /* for this machine ? */
1847 if (!strcmp(component->driver->ignore_machine,
1848 card->dev->driver->name))
1850 if (strcmp(component->driver->ignore_machine,
1851 dev_name(card->dev)))
1854 /* machine matches, so override the rtd data */
1855 for_each_card_prelinks(card, i, dai_link) {
1857 /* ignore this FE */
1858 if (dai_link->dynamic) {
1859 dai_link->ignore = true;
1863 dev_info(card->dev, "info: override BE DAI link %s\n",
1864 card->dai_link[i].name);
1866 /* override platform component */
1867 if (!dai_link->platforms) {
1868 dev_err(card->dev, "init platform error");
1871 dai_link->platforms->name = component->name;
1873 /* convert non BE into BE */
1874 dai_link->no_pcm = 1;
1876 /* override any BE fixups */
1877 dai_link->be_hw_params_fixup =
1878 component->driver->be_hw_params_fixup;
1881 * most BE links don't set stream name, so set it to
1882 * dai link name if it's NULL to help bind widgets.
1884 if (!dai_link->stream_name)
1885 dai_link->stream_name = dai_link->name;
1888 /* Inform userspace we are using alternate topology */
1889 if (component->driver->topology_name_prefix) {
1891 /* topology shortname created? */
1892 if (!card->topology_shortname_created) {
1893 comp_drv = component->driver;
1895 snprintf(card->topology_shortname, 32, "%s-%s",
1896 comp_drv->topology_name_prefix,
1898 card->topology_shortname_created = true;
1901 /* use topology shortname */
1902 card->name = card->topology_shortname;
1907 #define soc_setup_card_name(name, name1, name2, norm) \
1908 __soc_setup_card_name(name, sizeof(name), name1, name2, norm)
1909 static void __soc_setup_card_name(char *name, int len,
1910 const char *name1, const char *name2,
1915 snprintf(name, len, "%s", name1 ? name1 : name2);
1921 * Name normalization
1923 * The driver name is somewhat special, as it's used as a key for
1924 * searches in the user-space.
1927 * "abcd??efg" -> "abcd__efg"
1929 for (i = 0; i < len; i++) {
1936 if (!isalnum(name[i]))
1943 static void soc_cleanup_card_resources(struct snd_soc_card *card)
1945 struct snd_soc_dai_link *link, *_link;
1947 /* This should be called before snd_card_free() */
1948 soc_remove_link_components(card);
1950 /* free the ALSA card at first; this syncs with pending operations */
1951 if (card->snd_card) {
1952 snd_card_free(card->snd_card);
1953 card->snd_card = NULL;
1956 snd_soc_dapm_shutdown(card);
1958 /* remove and free each DAI */
1959 soc_remove_link_dais(card);
1961 for_each_card_links_safe(card, link, _link)
1962 snd_soc_remove_dai_link(card, link);
1964 /* remove auxiliary devices */
1965 soc_remove_aux_devices(card);
1966 soc_unbind_aux_dev(card);
1968 snd_soc_dapm_free(&card->dapm);
1969 soc_cleanup_card_debugfs(card);
1971 /* remove the card */
1976 static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
1978 if (card->instantiated) {
1979 card->instantiated = false;
1980 snd_soc_flush_all_delayed_work(card);
1982 soc_cleanup_card_resources(card);
1984 list_add(&card->list, &unbind_card_list);
1987 list_del(&card->list);
1991 static int snd_soc_bind_card(struct snd_soc_card *card)
1993 struct snd_soc_pcm_runtime *rtd;
1994 struct snd_soc_dai_link *dai_link;
1997 mutex_lock(&client_mutex);
1998 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
2000 snd_soc_dapm_init(&card->dapm, card, NULL);
2002 /* check whether any platform is ignore machine FE and using topology */
2003 soc_check_tplg_fes(card);
2005 /* bind aux_devs too */
2006 ret = soc_bind_aux_dev(card);
2010 /* add predefined DAI links to the list */
2012 for_each_card_prelinks(card, i, dai_link) {
2013 ret = snd_soc_add_dai_link(card, dai_link);
2018 /* card bind complete so register a sound card */
2019 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2020 card->owner, 0, &card->snd_card);
2023 "ASoC: can't create sound card for card %s: %d\n",
2028 soc_init_card_debugfs(card);
2030 soc_resume_init(card);
2032 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2033 card->num_dapm_widgets);
2037 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2038 card->num_of_dapm_widgets);
2042 /* initialise the sound card only once */
2044 ret = card->probe(card);
2049 /* probe all components used by DAI links on this card */
2050 ret = soc_probe_link_components(card);
2053 "ASoC: failed to instantiate card %d\n", ret);
2057 /* probe auxiliary components */
2058 ret = soc_probe_aux_devices(card);
2061 "ASoC: failed to probe aux component %d\n", ret);
2065 /* probe all DAI links on this card */
2066 ret = soc_probe_link_dais(card);
2069 "ASoC: failed to instantiate card %d\n", ret);
2073 for_each_card_rtds(card, rtd)
2074 soc_link_init(card, rtd);
2076 snd_soc_dapm_link_dai_widgets(card);
2077 snd_soc_dapm_connect_dai_link_widgets(card);
2079 ret = snd_soc_add_card_controls(card, card->controls,
2080 card->num_controls);
2084 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2085 card->num_dapm_routes);
2089 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2090 card->num_of_dapm_routes);
2094 /* try to set some sane longname if DMI is available */
2095 snd_soc_set_dmi_name(card, NULL);
2097 soc_setup_card_name(card->snd_card->shortname,
2098 card->name, NULL, 0);
2099 soc_setup_card_name(card->snd_card->longname,
2100 card->long_name, card->name, 0);
2101 soc_setup_card_name(card->snd_card->driver,
2102 card->driver_name, card->name, 1);
2104 if (card->late_probe) {
2105 ret = card->late_probe(card);
2107 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2113 snd_soc_dapm_new_widgets(card);
2115 ret = snd_card_register(card->snd_card);
2117 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2122 card->instantiated = 1;
2123 dapm_mark_endpoints_dirty(card);
2124 snd_soc_dapm_sync(&card->dapm);
2126 /* deactivate pins to sleep state */
2127 for_each_card_rtds(card, rtd) {
2128 struct snd_soc_dai *dai;
2130 for_each_rtd_codec_dai(rtd, i, dai) {
2132 pinctrl_pm_select_sleep_state(dai->dev);
2135 if (!rtd->cpu_dai->active)
2136 pinctrl_pm_select_sleep_state(rtd->cpu_dai->dev);
2141 soc_cleanup_card_resources(card);
2143 mutex_unlock(&card->mutex);
2144 mutex_unlock(&client_mutex);
2149 /* probes a new socdev */
2150 static int soc_probe(struct platform_device *pdev)
2152 struct snd_soc_card *card = platform_get_drvdata(pdev);
2155 * no card, so machine driver should be registering card
2156 * we should not be here in that case so ret error
2161 dev_warn(&pdev->dev,
2162 "ASoC: machine %s should use snd_soc_register_card()\n",
2165 /* Bodge while we unpick instantiation */
2166 card->dev = &pdev->dev;
2168 return snd_soc_register_card(card);
2171 /* removes a socdev */
2172 static int soc_remove(struct platform_device *pdev)
2174 struct snd_soc_card *card = platform_get_drvdata(pdev);
2176 snd_soc_unregister_card(card);
2180 int snd_soc_poweroff(struct device *dev)
2182 struct snd_soc_card *card = dev_get_drvdata(dev);
2183 struct snd_soc_pcm_runtime *rtd;
2185 if (!card->instantiated)
2189 * Flush out pmdown_time work - we actually do want to run it
2190 * now, we're shutting down so no imminent restart.
2192 snd_soc_flush_all_delayed_work(card);
2194 snd_soc_dapm_shutdown(card);
2196 /* deactivate pins to sleep state */
2197 for_each_card_rtds(card, rtd) {
2198 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2199 struct snd_soc_dai *codec_dai;
2202 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2203 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2204 pinctrl_pm_select_sleep_state(codec_dai->dev);
2210 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2212 const struct dev_pm_ops snd_soc_pm_ops = {
2213 .suspend = snd_soc_suspend,
2214 .resume = snd_soc_resume,
2215 .freeze = snd_soc_suspend,
2216 .thaw = snd_soc_resume,
2217 .poweroff = snd_soc_poweroff,
2218 .restore = snd_soc_resume,
2220 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2222 /* ASoC platform driver */
2223 static struct platform_driver soc_driver = {
2225 .name = "soc-audio",
2226 .pm = &snd_soc_pm_ops,
2229 .remove = soc_remove,
2233 * snd_soc_cnew - create new control
2234 * @_template: control template
2235 * @data: control private data
2236 * @long_name: control long name
2237 * @prefix: control name prefix
2239 * Create a new mixer control from a template control.
2241 * Returns 0 for success, else error.
2243 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2244 void *data, const char *long_name,
2247 struct snd_kcontrol_new template;
2248 struct snd_kcontrol *kcontrol;
2251 memcpy(&template, _template, sizeof(template));
2255 long_name = template.name;
2258 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2262 template.name = name;
2264 template.name = long_name;
2267 kcontrol = snd_ctl_new1(&template, data);
2273 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2275 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2276 const struct snd_kcontrol_new *controls, int num_controls,
2277 const char *prefix, void *data)
2281 for (i = 0; i < num_controls; i++) {
2282 const struct snd_kcontrol_new *control = &controls[i];
2284 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2285 control->name, prefix));
2287 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2288 control->name, err);
2296 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2299 struct snd_card *card = soc_card->snd_card;
2300 struct snd_kcontrol *kctl;
2302 if (unlikely(!name))
2305 list_for_each_entry(kctl, &card->controls, list)
2306 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2310 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2313 * snd_soc_add_component_controls - Add an array of controls to a component.
2315 * @component: Component to add controls to
2316 * @controls: Array of controls to add
2317 * @num_controls: Number of elements in the array
2319 * Return: 0 for success, else error.
2321 int snd_soc_add_component_controls(struct snd_soc_component *component,
2322 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2324 struct snd_card *card = component->card->snd_card;
2326 return snd_soc_add_controls(card, component->dev, controls,
2327 num_controls, component->name_prefix, component);
2329 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2332 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2333 * Convenience function to add a list of controls.
2335 * @soc_card: SoC card to add controls to
2336 * @controls: array of controls to add
2337 * @num_controls: number of elements in the array
2339 * Return 0 for success, else error.
2341 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2342 const struct snd_kcontrol_new *controls, int num_controls)
2344 struct snd_card *card = soc_card->snd_card;
2346 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2349 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2352 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2353 * Convienience function to add a list of controls.
2355 * @dai: DAI to add controls to
2356 * @controls: array of controls to add
2357 * @num_controls: number of elements in the array
2359 * Return 0 for success, else error.
2361 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2362 const struct snd_kcontrol_new *controls, int num_controls)
2364 struct snd_card *card = dai->component->card->snd_card;
2366 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2369 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2372 * snd_soc_register_card - Register a card with the ASoC core
2374 * @card: Card to register
2377 int snd_soc_register_card(struct snd_soc_card *card)
2379 if (!card->name || !card->dev)
2382 dev_set_drvdata(card->dev, card);
2384 INIT_LIST_HEAD(&card->widgets);
2385 INIT_LIST_HEAD(&card->paths);
2386 INIT_LIST_HEAD(&card->dapm_list);
2387 INIT_LIST_HEAD(&card->aux_comp_list);
2388 INIT_LIST_HEAD(&card->component_dev_list);
2389 INIT_LIST_HEAD(&card->list);
2390 INIT_LIST_HEAD(&card->dai_link_list);
2391 INIT_LIST_HEAD(&card->rtd_list);
2392 INIT_LIST_HEAD(&card->dapm_dirty);
2393 INIT_LIST_HEAD(&card->dobj_list);
2395 card->instantiated = 0;
2396 mutex_init(&card->mutex);
2397 mutex_init(&card->dapm_mutex);
2398 mutex_init(&card->pcm_mutex);
2399 spin_lock_init(&card->dpcm_lock);
2401 return snd_soc_bind_card(card);
2403 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2406 * snd_soc_unregister_card - Unregister a card with the ASoC core
2408 * @card: Card to unregister
2411 int snd_soc_unregister_card(struct snd_soc_card *card)
2413 mutex_lock(&client_mutex);
2414 snd_soc_unbind_card(card, true);
2415 mutex_unlock(&client_mutex);
2416 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2420 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2423 * Simplify DAI link configuration by removing ".-1" from device names
2424 * and sanitizing names.
2426 static char *fmt_single_name(struct device *dev, int *id)
2428 char *found, name[NAME_SIZE];
2431 if (dev_name(dev) == NULL)
2434 strlcpy(name, dev_name(dev), NAME_SIZE);
2436 /* are we a "%s.%d" name (platform and SPI components) */
2437 found = strstr(name, dev->driver->name);
2440 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2442 /* discard ID from name if ID == -1 */
2444 found[strlen(dev->driver->name)] = '\0';
2448 /* I2C component devices are named "bus-addr" */
2449 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2450 char tmp[NAME_SIZE];
2452 /* create unique ID number from I2C addr and bus */
2453 *id = ((id1 & 0xffff) << 16) + id2;
2455 /* sanitize component name for DAI link creation */
2456 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name,
2458 strlcpy(name, tmp, NAME_SIZE);
2463 return devm_kstrdup(dev, name, GFP_KERNEL);
2467 * Simplify DAI link naming for single devices with multiple DAIs by removing
2468 * any ".-1" and using the DAI name (instead of device name).
2470 static inline char *fmt_multiple_name(struct device *dev,
2471 struct snd_soc_dai_driver *dai_drv)
2473 if (dai_drv->name == NULL) {
2475 "ASoC: error - multiple DAI %s registered with no name\n",
2480 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2483 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2485 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2486 list_del(&dai->list);
2488 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2491 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2493 * @component: The component the DAIs are registered for
2494 * @dai_drv: DAI driver to use for the DAI
2496 * Topology can use this API to register DAIs when probing a component.
2497 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2498 * will be freed in the component cleanup.
2500 struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2501 struct snd_soc_dai_driver *dai_drv,
2502 bool legacy_dai_naming)
2504 struct device *dev = component->dev;
2505 struct snd_soc_dai *dai;
2507 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2509 lockdep_assert_held(&client_mutex);
2511 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2516 * Back in the old days when we still had component-less DAIs,
2517 * instead of having a static name, component-less DAIs would
2518 * inherit the name of the parent device so it is possible to
2519 * register multiple instances of the DAI. We still need to keep
2520 * the same naming style even though those DAIs are not
2521 * component-less anymore.
2523 if (legacy_dai_naming &&
2524 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2525 dai->name = fmt_single_name(dev, &dai->id);
2527 dai->name = fmt_multiple_name(dev, dai_drv);
2529 dai->id = dai_drv->id;
2531 dai->id = component->num_dai;
2536 dai->component = component;
2538 dai->driver = dai_drv;
2539 if (!dai->driver->ops)
2540 dai->driver->ops = &null_dai_ops;
2542 /* see for_each_component_dais */
2543 list_add_tail(&dai->list, &component->dai_list);
2544 component->num_dai++;
2546 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2551 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2553 * @component: The component for which the DAIs should be unregistered
2555 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2557 struct snd_soc_dai *dai, *_dai;
2559 for_each_component_dais_safe(component, dai, _dai)
2560 snd_soc_unregister_dai(dai);
2564 * snd_soc_register_dais - Register a DAI with the ASoC core
2566 * @component: The component the DAIs are registered for
2567 * @dai_drv: DAI driver to use for the DAIs
2568 * @count: Number of DAIs
2570 static int snd_soc_register_dais(struct snd_soc_component *component,
2571 struct snd_soc_dai_driver *dai_drv,
2574 struct snd_soc_dai *dai;
2578 for (i = 0; i < count; i++) {
2579 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2580 !component->driver->non_legacy_dai_naming);
2590 snd_soc_unregister_dais(component);
2595 static int snd_soc_component_initialize(struct snd_soc_component *component,
2596 const struct snd_soc_component_driver *driver, struct device *dev)
2598 INIT_LIST_HEAD(&component->dai_list);
2599 INIT_LIST_HEAD(&component->dobj_list);
2600 INIT_LIST_HEAD(&component->card_list);
2601 mutex_init(&component->io_mutex);
2603 component->name = fmt_single_name(dev, &component->id);
2604 if (!component->name) {
2605 dev_err(dev, "ASoC: Failed to allocate name\n");
2609 component->dev = dev;
2610 component->driver = driver;
2615 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2617 int val_bytes = regmap_get_val_bytes(component->regmap);
2619 /* Errors are legitimate for non-integer byte multiples */
2621 component->val_bytes = val_bytes;
2624 #ifdef CONFIG_REGMAP
2627 * snd_soc_component_init_regmap() - Initialize regmap instance for the
2629 * @component: The component for which to initialize the regmap instance
2630 * @regmap: The regmap instance that should be used by the component
2632 * This function allows deferred assignment of the regmap instance that is
2633 * associated with the component. Only use this if the regmap instance is not
2634 * yet ready when the component is registered. The function must also be called
2635 * before the first IO attempt of the component.
2637 void snd_soc_component_init_regmap(struct snd_soc_component *component,
2638 struct regmap *regmap)
2640 component->regmap = regmap;
2641 snd_soc_component_setup_regmap(component);
2643 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2646 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the
2648 * @component: The component for which to de-initialize the regmap instance
2650 * Calls regmap_exit() on the regmap instance associated to the component and
2651 * removes the regmap instance from the component.
2653 * This function should only be used if snd_soc_component_init_regmap() was used
2654 * to initialize the regmap instance.
2656 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2658 regmap_exit(component->regmap);
2659 component->regmap = NULL;
2661 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2665 #define ENDIANNESS_MAP(name) \
2666 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2667 static u64 endianness_format_map[] = {
2668 ENDIANNESS_MAP(S16_),
2669 ENDIANNESS_MAP(U16_),
2670 ENDIANNESS_MAP(S24_),
2671 ENDIANNESS_MAP(U24_),
2672 ENDIANNESS_MAP(S32_),
2673 ENDIANNESS_MAP(U32_),
2674 ENDIANNESS_MAP(S24_3),
2675 ENDIANNESS_MAP(U24_3),
2676 ENDIANNESS_MAP(S20_3),
2677 ENDIANNESS_MAP(U20_3),
2678 ENDIANNESS_MAP(S18_3),
2679 ENDIANNESS_MAP(U18_3),
2680 ENDIANNESS_MAP(FLOAT_),
2681 ENDIANNESS_MAP(FLOAT64_),
2682 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2686 * Fix up the DAI formats for endianness: codecs don't actually see
2687 * the endianness of the data but we're using the CPU format
2688 * definitions which do need to include endianness so we ensure that
2689 * codec DAIs always have both big and little endian variants set.
2691 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2695 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2696 if (stream->formats & endianness_format_map[i])
2697 stream->formats |= endianness_format_map[i];
2700 static void snd_soc_try_rebind_card(void)
2702 struct snd_soc_card *card, *c;
2704 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2705 if (!snd_soc_bind_card(card))
2706 list_del(&card->list);
2709 static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2711 struct snd_soc_card *card = component->card;
2713 snd_soc_unregister_dais(component);
2716 snd_soc_unbind_card(card, false);
2718 list_del(&component->list);
2721 int snd_soc_add_component(struct device *dev,
2722 struct snd_soc_component *component,
2723 const struct snd_soc_component_driver *component_driver,
2724 struct snd_soc_dai_driver *dai_drv,
2730 mutex_lock(&client_mutex);
2732 ret = snd_soc_component_initialize(component, component_driver, dev);
2736 if (component_driver->endianness) {
2737 for (i = 0; i < num_dai; i++) {
2738 convert_endianness_formats(&dai_drv[i].playback);
2739 convert_endianness_formats(&dai_drv[i].capture);
2743 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2745 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
2749 if (!component->driver->write && !component->driver->read) {
2750 if (!component->regmap)
2751 component->regmap = dev_get_regmap(component->dev,
2753 if (component->regmap)
2754 snd_soc_component_setup_regmap(component);
2757 /* see for_each_component */
2758 list_add(&component->list, &component_list);
2762 snd_soc_del_component_unlocked(component);
2764 mutex_unlock(&client_mutex);
2767 snd_soc_try_rebind_card();
2771 EXPORT_SYMBOL_GPL(snd_soc_add_component);
2773 int snd_soc_register_component(struct device *dev,
2774 const struct snd_soc_component_driver *component_driver,
2775 struct snd_soc_dai_driver *dai_drv,
2778 struct snd_soc_component *component;
2780 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2784 return snd_soc_add_component(dev, component, component_driver,
2787 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2790 * snd_soc_unregister_component - Unregister all related component
2791 * from the ASoC core
2793 * @dev: The device to unregister
2795 void snd_soc_unregister_component(struct device *dev)
2797 struct snd_soc_component *component;
2799 mutex_lock(&client_mutex);
2801 component = snd_soc_lookup_component_nolocked(dev, NULL);
2805 snd_soc_del_component_unlocked(component);
2807 mutex_unlock(&client_mutex);
2809 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2811 /* Retrieve a card's name from device tree */
2812 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2813 const char *propname)
2815 struct device_node *np;
2819 pr_err("card->dev is not set before calling %s\n", __func__);
2823 np = card->dev->of_node;
2825 ret = of_property_read_string_index(np, propname, 0, &card->name);
2827 * EINVAL means the property does not exist. This is fine providing
2828 * card->name was previously set, which is checked later in
2829 * snd_soc_register_card.
2831 if (ret < 0 && ret != -EINVAL) {
2833 "ASoC: Property '%s' could not be read: %d\n",
2840 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2842 static const struct snd_soc_dapm_widget simple_widgets[] = {
2843 SND_SOC_DAPM_MIC("Microphone", NULL),
2844 SND_SOC_DAPM_LINE("Line", NULL),
2845 SND_SOC_DAPM_HP("Headphone", NULL),
2846 SND_SOC_DAPM_SPK("Speaker", NULL),
2849 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2850 const char *propname)
2852 struct device_node *np = card->dev->of_node;
2853 struct snd_soc_dapm_widget *widgets;
2854 const char *template, *wname;
2855 int i, j, num_widgets, ret;
2857 num_widgets = of_property_count_strings(np, propname);
2858 if (num_widgets < 0) {
2860 "ASoC: Property '%s' does not exist\n", propname);
2863 if (num_widgets & 1) {
2865 "ASoC: Property '%s' length is not even\n", propname);
2871 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2876 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2880 "ASoC: Could not allocate memory for widgets\n");
2884 for (i = 0; i < num_widgets; i++) {
2885 ret = of_property_read_string_index(np, propname,
2889 "ASoC: Property '%s' index %d read error:%d\n",
2890 propname, 2 * i, ret);
2894 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
2895 if (!strncmp(template, simple_widgets[j].name,
2896 strlen(simple_widgets[j].name))) {
2897 widgets[i] = simple_widgets[j];
2902 if (j >= ARRAY_SIZE(simple_widgets)) {
2904 "ASoC: DAPM widget '%s' is not supported\n",
2909 ret = of_property_read_string_index(np, propname,
2914 "ASoC: Property '%s' index %d read error:%d\n",
2915 propname, (2 * i) + 1, ret);
2919 widgets[i].name = wname;
2922 card->of_dapm_widgets = widgets;
2923 card->num_of_dapm_widgets = num_widgets;
2927 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
2929 int snd_soc_of_get_slot_mask(struct device_node *np,
2930 const char *prop_name,
2934 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
2940 for (i = 0; i < val; i++)
2941 if (be32_to_cpup(&of_slot_mask[i]))
2946 EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
2948 int snd_soc_of_parse_tdm_slot(struct device_node *np,
2949 unsigned int *tx_mask,
2950 unsigned int *rx_mask,
2951 unsigned int *slots,
2952 unsigned int *slot_width)
2958 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
2960 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
2962 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
2963 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
2971 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
2972 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
2982 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
2984 void snd_soc_of_parse_node_prefix(struct device_node *np,
2985 struct snd_soc_codec_conf *codec_conf,
2986 struct device_node *of_node,
2987 const char *propname)
2992 ret = of_property_read_string(np, propname, &str);
2994 /* no prefix is not error */
2998 codec_conf->of_node = of_node;
2999 codec_conf->name_prefix = str;
3001 EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
3003 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3004 const char *propname)
3006 struct device_node *np = card->dev->of_node;
3008 struct snd_soc_dapm_route *routes;
3011 num_routes = of_property_count_strings(np, propname);
3012 if (num_routes < 0 || num_routes & 1) {
3014 "ASoC: Property '%s' does not exist or its length is not even\n",
3020 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3025 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3029 "ASoC: Could not allocate DAPM route table\n");
3033 for (i = 0; i < num_routes; i++) {
3034 ret = of_property_read_string_index(np, propname,
3035 2 * i, &routes[i].sink);
3038 "ASoC: Property '%s' index %d could not be read: %d\n",
3039 propname, 2 * i, ret);
3042 ret = of_property_read_string_index(np, propname,
3043 (2 * i) + 1, &routes[i].source);
3046 "ASoC: Property '%s' index %d could not be read: %d\n",
3047 propname, (2 * i) + 1, ret);
3052 card->num_of_dapm_routes = num_routes;
3053 card->of_dapm_routes = routes;
3057 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3059 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3061 struct device_node **bitclkmaster,
3062 struct device_node **framemaster)
3066 unsigned int format = 0;
3072 } of_fmt_table[] = {
3073 { "i2s", SND_SOC_DAIFMT_I2S },
3074 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3075 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3076 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3077 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3078 { "ac97", SND_SOC_DAIFMT_AC97 },
3079 { "pdm", SND_SOC_DAIFMT_PDM},
3080 { "msb", SND_SOC_DAIFMT_MSB },
3081 { "lsb", SND_SOC_DAIFMT_LSB },
3088 * check "dai-format = xxx"
3089 * or "[prefix]format = xxx"
3090 * SND_SOC_DAIFMT_FORMAT_MASK area
3092 ret = of_property_read_string(np, "dai-format", &str);
3094 snprintf(prop, sizeof(prop), "%sformat", prefix);
3095 ret = of_property_read_string(np, prop, &str);
3098 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3099 if (strcmp(str, of_fmt_table[i].name) == 0) {
3100 format |= of_fmt_table[i].val;
3107 * check "[prefix]continuous-clock"
3108 * SND_SOC_DAIFMT_CLOCK_MASK area
3110 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3111 if (of_property_read_bool(np, prop))
3112 format |= SND_SOC_DAIFMT_CONT;
3114 format |= SND_SOC_DAIFMT_GATED;
3117 * check "[prefix]bitclock-inversion"
3118 * check "[prefix]frame-inversion"
3119 * SND_SOC_DAIFMT_INV_MASK area
3121 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3122 bit = !!of_get_property(np, prop, NULL);
3124 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3125 frame = !!of_get_property(np, prop, NULL);
3127 switch ((bit << 4) + frame) {
3129 format |= SND_SOC_DAIFMT_IB_IF;
3132 format |= SND_SOC_DAIFMT_IB_NF;
3135 format |= SND_SOC_DAIFMT_NB_IF;
3138 /* SND_SOC_DAIFMT_NB_NF is default */
3143 * check "[prefix]bitclock-master"
3144 * check "[prefix]frame-master"
3145 * SND_SOC_DAIFMT_MASTER_MASK area
3147 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3148 bit = !!of_get_property(np, prop, NULL);
3149 if (bit && bitclkmaster)
3150 *bitclkmaster = of_parse_phandle(np, prop, 0);
3152 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3153 frame = !!of_get_property(np, prop, NULL);
3154 if (frame && framemaster)
3155 *framemaster = of_parse_phandle(np, prop, 0);
3157 switch ((bit << 4) + frame) {
3159 format |= SND_SOC_DAIFMT_CBM_CFM;
3162 format |= SND_SOC_DAIFMT_CBM_CFS;
3165 format |= SND_SOC_DAIFMT_CBS_CFM;
3168 format |= SND_SOC_DAIFMT_CBS_CFS;
3174 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3176 int snd_soc_get_dai_id(struct device_node *ep)
3178 struct snd_soc_component *component;
3179 struct snd_soc_dai_link_component dlc;
3182 dlc.of_node = of_graph_get_port_parent(ep);
3185 * For example HDMI case, HDMI has video/sound port,
3186 * but ALSA SoC needs sound port number only.
3187 * Thus counting HDMI DT port/endpoint doesn't work.
3188 * Then, it should have .of_xlate_dai_id
3191 mutex_lock(&client_mutex);
3192 component = soc_find_component(&dlc);
3194 ret = snd_soc_component_of_xlate_dai_id(component, ep);
3195 mutex_unlock(&client_mutex);
3197 of_node_put(dlc.of_node);
3201 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3203 int snd_soc_get_dai_name(struct of_phandle_args *args,
3204 const char **dai_name)
3206 struct snd_soc_component *pos;
3207 struct device_node *component_of_node;
3208 int ret = -EPROBE_DEFER;
3210 mutex_lock(&client_mutex);
3211 for_each_component(pos) {
3212 component_of_node = soc_component_to_node(pos);
3214 if (component_of_node != args->np)
3217 ret = snd_soc_component_of_xlate_dai_name(pos, args, dai_name);
3218 if (ret == -ENOTSUPP) {
3219 struct snd_soc_dai *dai;
3222 switch (args->args_count) {
3224 id = 0; /* same as dai_drv[0] */
3234 if (id < 0 || id >= pos->num_dai) {
3241 /* find target DAI */
3242 for_each_component_dais(pos, dai) {
3248 *dai_name = dai->driver->name;
3250 *dai_name = pos->name;
3255 mutex_unlock(&client_mutex);
3258 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3260 int snd_soc_of_get_dai_name(struct device_node *of_node,
3261 const char **dai_name)
3263 struct of_phandle_args args;
3266 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3267 "#sound-dai-cells", 0, &args);
3271 ret = snd_soc_get_dai_name(&args, dai_name);
3273 of_node_put(args.np);
3277 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3280 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3281 * @dai_link: DAI link
3283 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3285 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3287 struct snd_soc_dai_link_component *component;
3290 for_each_link_codecs(dai_link, index, component) {
3291 if (!component->of_node)
3293 of_node_put(component->of_node);
3294 component->of_node = NULL;
3297 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3300 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3302 * @of_node: Device node
3303 * @dai_link: DAI link
3305 * Builds an array of CODEC DAI components from the DAI link property
3307 * The array is set in the DAI link and the number of DAIs is set accordingly.
3308 * The device nodes in the array (of_node) must be dereferenced by calling
3309 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3311 * Returns 0 for success
3313 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3314 struct device_node *of_node,
3315 struct snd_soc_dai_link *dai_link)
3317 struct of_phandle_args args;
3318 struct snd_soc_dai_link_component *component;
3320 int index, num_codecs, ret;
3322 /* Count the number of CODECs */
3324 num_codecs = of_count_phandle_with_args(of_node, name,
3325 "#sound-dai-cells");
3326 if (num_codecs <= 0) {
3327 if (num_codecs == -ENOENT)
3328 dev_err(dev, "No 'sound-dai' property\n");
3330 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3333 component = devm_kcalloc(dev,
3334 num_codecs, sizeof(*component),
3338 dai_link->codecs = component;
3339 dai_link->num_codecs = num_codecs;
3341 /* Parse the list */
3342 for_each_link_codecs(dai_link, index, component) {
3343 ret = of_parse_phandle_with_args(of_node, name,
3348 component->of_node = args.np;
3349 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3355 snd_soc_of_put_dai_link_codecs(dai_link);
3356 dai_link->codecs = NULL;
3357 dai_link->num_codecs = 0;
3360 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3362 static int __init snd_soc_init(void)
3364 snd_soc_debugfs_init();
3365 snd_soc_util_init();
3367 return platform_driver_register(&soc_driver);
3369 module_init(snd_soc_init);
3371 static void __exit snd_soc_exit(void)
3373 snd_soc_util_exit();
3374 snd_soc_debugfs_exit();
3376 platform_driver_unregister(&soc_driver);
3378 module_exit(snd_soc_exit);
3380 /* Module information */
3381 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3382 MODULE_DESCRIPTION("ALSA SoC Core");
3383 MODULE_LICENSE("GPL");
3384 MODULE_ALIAS("platform:soc-audio");