1 // SPDX-License-Identifier: GPL-2.0+
3 // soc-core.c -- ALSA SoC Audio Layer
5 // Copyright 2005 Wolfson Microelectronics PLC.
6 // Copyright 2005 Openedhand Ltd.
7 // Copyright (C) 2010 Slimlogic Ltd.
8 // Copyright (C) 2010 Texas Instruments Inc.
10 // Author: Liam Girdwood <lrg@slimlogic.co.uk>
11 // with code, comments and ideas from :-
12 // Richard Purdie <richard@openedhand.com>
15 // o Add hw rules to enforce rates, etc.
16 // o More testing with other codecs/machines.
17 // o Add more codecs and platforms to ensure good API coverage.
18 // o Support TDM on PCM and I2S
20 #include <linux/module.h>
21 #include <linux/moduleparam.h>
22 #include <linux/init.h>
23 #include <linux/delay.h>
25 #include <linux/bitops.h>
26 #include <linux/debugfs.h>
27 #include <linux/platform_device.h>
28 #include <linux/pinctrl/consumer.h>
29 #include <linux/ctype.h>
30 #include <linux/slab.h>
32 #include <linux/of_graph.h>
33 #include <linux/dmi.h>
34 #include <linux/acpi.h>
35 #include <sound/core.h>
36 #include <sound/pcm.h>
37 #include <sound/pcm_params.h>
38 #include <sound/soc.h>
39 #include <sound/soc-dpcm.h>
40 #include <sound/soc-topology.h>
41 #include <sound/soc-link.h>
42 #include <sound/initval.h>
44 #define CREATE_TRACE_POINTS
45 #include <trace/events/asoc.h>
47 static DEFINE_MUTEX(client_mutex);
48 static LIST_HEAD(component_list);
49 static LIST_HEAD(unbind_card_list);
51 #define for_each_component(component) \
52 list_for_each_entry(component, &component_list, list)
55 * This is used if driver don't need to have CPU/Codec/Platform
58 struct snd_soc_dai_link_component null_dailink_component[0];
59 EXPORT_SYMBOL_GPL(null_dailink_component);
62 * This is a timeout to do a DAPM powerdown after a stream is closed().
63 * It can be used to eliminate pops between different playback streams, e.g.
64 * between two audio tracks.
66 static int pmdown_time = 5000;
67 module_param(pmdown_time, int, 0);
68 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
70 static ssize_t pmdown_time_show(struct device *dev,
71 struct device_attribute *attr, char *buf)
73 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
75 return sprintf(buf, "%ld\n", rtd->pmdown_time);
78 static ssize_t pmdown_time_set(struct device *dev,
79 struct device_attribute *attr,
80 const char *buf, size_t count)
82 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
85 ret = kstrtol(buf, 10, &rtd->pmdown_time);
92 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
94 static struct attribute *soc_dev_attrs[] = {
95 &dev_attr_pmdown_time.attr,
99 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
100 struct attribute *attr, int idx)
102 struct device *dev = kobj_to_dev(kobj);
103 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
108 if (attr == &dev_attr_pmdown_time.attr)
109 return attr->mode; /* always visible */
110 return rtd->num_codecs ? attr->mode : 0; /* enabled only with codec */
113 static const struct attribute_group soc_dapm_dev_group = {
114 .attrs = soc_dapm_dev_attrs,
115 .is_visible = soc_dev_attr_is_visible,
118 static const struct attribute_group soc_dev_group = {
119 .attrs = soc_dev_attrs,
120 .is_visible = soc_dev_attr_is_visible,
123 static const struct attribute_group *soc_dev_attr_groups[] = {
129 #ifdef CONFIG_DEBUG_FS
130 struct dentry *snd_soc_debugfs_root;
131 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
133 static void soc_init_component_debugfs(struct snd_soc_component *component)
135 if (!component->card->debugfs_card_root)
138 if (component->debugfs_prefix) {
141 name = kasprintf(GFP_KERNEL, "%s:%s",
142 component->debugfs_prefix, component->name);
144 component->debugfs_root = debugfs_create_dir(name,
145 component->card->debugfs_card_root);
149 component->debugfs_root = debugfs_create_dir(component->name,
150 component->card->debugfs_card_root);
153 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
154 component->debugfs_root);
157 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
159 if (!component->debugfs_root)
161 debugfs_remove_recursive(component->debugfs_root);
162 component->debugfs_root = NULL;
165 static int dai_list_show(struct seq_file *m, void *v)
167 struct snd_soc_component *component;
168 struct snd_soc_dai *dai;
170 mutex_lock(&client_mutex);
172 for_each_component(component)
173 for_each_component_dais(component, dai)
174 seq_printf(m, "%s\n", dai->name);
176 mutex_unlock(&client_mutex);
180 DEFINE_SHOW_ATTRIBUTE(dai_list);
182 static int component_list_show(struct seq_file *m, void *v)
184 struct snd_soc_component *component;
186 mutex_lock(&client_mutex);
188 for_each_component(component)
189 seq_printf(m, "%s\n", component->name);
191 mutex_unlock(&client_mutex);
195 DEFINE_SHOW_ATTRIBUTE(component_list);
197 static void soc_init_card_debugfs(struct snd_soc_card *card)
199 card->debugfs_card_root = debugfs_create_dir(card->name,
200 snd_soc_debugfs_root);
202 debugfs_create_u32("dapm_pop_time", 0644, card->debugfs_card_root,
205 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
208 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
210 debugfs_remove_recursive(card->debugfs_card_root);
211 card->debugfs_card_root = NULL;
214 static void snd_soc_debugfs_init(void)
216 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
218 debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
221 debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
222 &component_list_fops);
225 static void snd_soc_debugfs_exit(void)
227 debugfs_remove_recursive(snd_soc_debugfs_root);
232 static inline void soc_init_component_debugfs(
233 struct snd_soc_component *component)
237 static inline void soc_cleanup_component_debugfs(
238 struct snd_soc_component *component)
242 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
246 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
250 static inline void snd_soc_debugfs_init(void)
254 static inline void snd_soc_debugfs_exit(void)
260 static int snd_soc_rtd_add_component(struct snd_soc_pcm_runtime *rtd,
261 struct snd_soc_component *component)
263 struct snd_soc_component *comp;
266 for_each_rtd_components(rtd, i, comp) {
267 /* already connected */
268 if (comp == component)
272 /* see for_each_rtd_components */
273 rtd->components[rtd->num_components] = component;
274 rtd->num_components++;
279 struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
280 const char *driver_name)
282 struct snd_soc_component *component;
291 * snd_soc_rtdcom_lookup() will find component from rtd by using
292 * specified driver name.
293 * But, if many components which have same driver name are connected
294 * to 1 rtd, this function will return 1st found component.
296 for_each_rtd_components(rtd, i, component) {
297 const char *component_name = component->driver->name;
302 if ((component_name == driver_name) ||
303 strcmp(component_name, driver_name) == 0)
309 EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
311 struct snd_soc_component
312 *snd_soc_lookup_component_nolocked(struct device *dev, const char *driver_name)
314 struct snd_soc_component *component;
315 struct snd_soc_component *found_component;
317 found_component = NULL;
318 for_each_component(component) {
319 if ((dev == component->dev) &&
321 (driver_name == component->driver->name) ||
322 (strcmp(component->driver->name, driver_name) == 0))) {
323 found_component = component;
328 return found_component;
330 EXPORT_SYMBOL_GPL(snd_soc_lookup_component_nolocked);
332 struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
333 const char *driver_name)
335 struct snd_soc_component *component;
337 mutex_lock(&client_mutex);
338 component = snd_soc_lookup_component_nolocked(dev, driver_name);
339 mutex_unlock(&client_mutex);
343 EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
345 struct snd_soc_pcm_runtime
346 *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
347 struct snd_soc_dai_link *dai_link)
349 struct snd_soc_pcm_runtime *rtd;
351 for_each_card_rtds(card, rtd) {
352 if (rtd->dai_link == dai_link)
355 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link->name);
358 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
361 * Power down the audio subsystem pmdown_time msecs after close is called.
362 * This is to ensure there are no pops or clicks in between any music tracks
363 * due to DAPM power cycling.
365 void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
367 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
368 int playback = SNDRV_PCM_STREAM_PLAYBACK;
370 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
373 "ASoC: pop wq checking: %s status: %s waiting: %s\n",
374 codec_dai->driver->playback.stream_name,
375 snd_soc_dai_stream_active(codec_dai, playback) ?
376 "active" : "inactive",
377 rtd->pop_wait ? "yes" : "no");
379 /* are we waiting on this codec DAI stream */
380 if (rtd->pop_wait == 1) {
382 snd_soc_dapm_stream_event(rtd, playback,
383 SND_SOC_DAPM_STREAM_STOP);
386 mutex_unlock(&rtd->card->pcm_mutex);
388 EXPORT_SYMBOL_GPL(snd_soc_close_delayed_work);
390 static void soc_release_rtd_dev(struct device *dev)
392 /* "dev" means "rtd->dev" */
396 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
401 list_del(&rtd->list);
403 if (delayed_work_pending(&rtd->delayed_work))
404 flush_delayed_work(&rtd->delayed_work);
405 snd_soc_pcm_component_free(rtd);
408 * we don't need to call kfree() for rtd->dev
410 * soc_release_rtd_dev()
412 * We don't need rtd->dev NULL check, because
413 * it is alloced *before* rtd.
415 * soc_new_pcm_runtime()
417 device_unregister(rtd->dev);
420 static void close_delayed_work(struct work_struct *work) {
421 struct snd_soc_pcm_runtime *rtd =
422 container_of(work, struct snd_soc_pcm_runtime,
425 if (rtd->close_delayed_work_func)
426 rtd->close_delayed_work_func(rtd);
429 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
430 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
432 struct snd_soc_pcm_runtime *rtd;
433 struct snd_soc_component *component;
441 dev = kzalloc(sizeof(struct device), GFP_KERNEL);
445 dev->parent = card->dev;
446 dev->release = soc_release_rtd_dev;
448 dev_set_name(dev, "%s", dai_link->name);
450 ret = device_register(dev);
452 put_device(dev); /* soc_release_rtd_dev */
459 rtd = devm_kzalloc(dev,
461 sizeof(*component) * (dai_link->num_cpus +
462 dai_link->num_codecs +
463 dai_link->num_platforms),
469 INIT_LIST_HEAD(&rtd->list);
470 for_each_pcm_streams(stream) {
471 INIT_LIST_HEAD(&rtd->dpcm[stream].be_clients);
472 INIT_LIST_HEAD(&rtd->dpcm[stream].fe_clients);
474 dev_set_drvdata(dev, rtd);
475 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
480 rtd->dais = devm_kcalloc(dev, dai_link->num_cpus + dai_link->num_codecs,
481 sizeof(struct snd_soc_dai *),
487 * dais = [][][][][][][][][][][][][][][][][][]
488 * ^cpu_dais ^codec_dais
489 * |--- num_cpus ---|--- num_codecs --|
492 * asoc_rtd_to_codec()
494 rtd->num_cpus = dai_link->num_cpus;
495 rtd->num_codecs = dai_link->num_codecs;
497 rtd->dai_link = dai_link;
498 rtd->num = card->num_rtd++;
500 /* see for_each_card_rtds */
501 list_add_tail(&rtd->list, &card->rtd_list);
503 ret = device_add_groups(dev, soc_dev_attr_groups);
510 soc_free_pcm_runtime(rtd);
514 static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
516 struct snd_soc_pcm_runtime *rtd;
518 for_each_card_rtds(card, rtd)
519 flush_delayed_work(&rtd->delayed_work);
522 #ifdef CONFIG_PM_SLEEP
523 static void soc_playback_digital_mute(struct snd_soc_card *card, int mute)
525 struct snd_soc_pcm_runtime *rtd;
526 struct snd_soc_dai *dai;
527 int playback = SNDRV_PCM_STREAM_PLAYBACK;
530 for_each_card_rtds(card, rtd) {
532 if (rtd->dai_link->ignore_suspend)
535 for_each_rtd_dais(rtd, i, dai) {
536 if (snd_soc_dai_stream_active(dai, playback))
537 snd_soc_dai_digital_mute(dai, mute, playback);
542 static void soc_dapm_suspend_resume(struct snd_soc_card *card, int event)
544 struct snd_soc_pcm_runtime *rtd;
547 for_each_card_rtds(card, rtd) {
549 if (rtd->dai_link->ignore_suspend)
552 for_each_pcm_streams(stream)
553 snd_soc_dapm_stream_event(rtd, stream, event);
557 /* powers down audio subsystem for suspend */
558 int snd_soc_suspend(struct device *dev)
560 struct snd_soc_card *card = dev_get_drvdata(dev);
561 struct snd_soc_component *component;
562 struct snd_soc_pcm_runtime *rtd;
565 /* If the card is not initialized yet there is nothing to do */
566 if (!card->instantiated)
570 * Due to the resume being scheduled into a workqueue we could
571 * suspend before that's finished - wait for it to complete.
573 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
575 /* we're going to block userspace touching us until resume completes */
576 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
578 /* mute any active DACs */
579 soc_playback_digital_mute(card, 1);
581 /* suspend all pcms */
582 for_each_card_rtds(card, rtd) {
583 if (rtd->dai_link->ignore_suspend)
586 snd_pcm_suspend_all(rtd->pcm);
589 snd_soc_card_suspend_pre(card);
591 /* close any waiting streams */
592 snd_soc_flush_all_delayed_work(card);
594 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_SUSPEND);
596 /* Recheck all endpoints too, their state is affected by suspend */
597 dapm_mark_endpoints_dirty(card);
598 snd_soc_dapm_sync(&card->dapm);
600 /* suspend all COMPONENTs */
601 for_each_card_rtds(card, rtd) {
603 if (rtd->dai_link->ignore_suspend)
606 for_each_rtd_components(rtd, i, component) {
607 struct snd_soc_dapm_context *dapm =
608 snd_soc_component_get_dapm(component);
611 * ignore if component was already suspended
613 if (snd_soc_component_is_suspended(component))
617 * If there are paths active then the COMPONENT will be
618 * held with bias _ON and should not be suspended.
620 switch (snd_soc_dapm_get_bias_level(dapm)) {
621 case SND_SOC_BIAS_STANDBY:
623 * If the COMPONENT is capable of idle
624 * bias off then being in STANDBY
625 * means it's doing something,
626 * otherwise fall through.
628 if (dapm->idle_bias_off) {
629 dev_dbg(component->dev,
630 "ASoC: idle_bias_off CODEC on over suspend\n");
635 case SND_SOC_BIAS_OFF:
636 snd_soc_component_suspend(component);
637 if (component->regmap)
638 regcache_mark_dirty(component->regmap);
639 /* deactivate pins to sleep state */
640 pinctrl_pm_select_sleep_state(component->dev);
643 dev_dbg(component->dev,
644 "ASoC: COMPONENT is on over suspend\n");
650 snd_soc_card_suspend_post(card);
654 EXPORT_SYMBOL_GPL(snd_soc_suspend);
657 * deferred resume work, so resume can complete before we finished
658 * setting our codec back up, which can be very slow on I2C
660 static void soc_resume_deferred(struct work_struct *work)
662 struct snd_soc_card *card =
663 container_of(work, struct snd_soc_card,
664 deferred_resume_work);
665 struct snd_soc_component *component;
668 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
669 * so userspace apps are blocked from touching us
672 dev_dbg(card->dev, "ASoC: starting resume work\n");
674 /* Bring us up into D2 so that DAPM starts enabling things */
675 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
677 snd_soc_card_resume_pre(card);
679 for_each_card_components(card, component) {
680 if (snd_soc_component_is_suspended(component))
681 snd_soc_component_resume(component);
684 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_RESUME);
686 /* unmute any active DACs */
687 soc_playback_digital_mute(card, 0);
689 snd_soc_card_resume_post(card);
691 dev_dbg(card->dev, "ASoC: resume work completed\n");
693 /* Recheck all endpoints too, their state is affected by suspend */
694 dapm_mark_endpoints_dirty(card);
695 snd_soc_dapm_sync(&card->dapm);
697 /* userspace can access us now we are back as we were before */
698 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
701 /* powers up audio subsystem after a suspend */
702 int snd_soc_resume(struct device *dev)
704 struct snd_soc_card *card = dev_get_drvdata(dev);
705 struct snd_soc_component *component;
707 /* If the card is not initialized yet there is nothing to do */
708 if (!card->instantiated)
711 /* activate pins from sleep state */
712 for_each_card_components(card, component)
713 if (snd_soc_component_active(component))
714 pinctrl_pm_select_default_state(component->dev);
716 dev_dbg(dev, "ASoC: Scheduling resume work\n");
717 if (!schedule_work(&card->deferred_resume_work))
718 dev_err(dev, "ASoC: resume work item may be lost\n");
722 EXPORT_SYMBOL_GPL(snd_soc_resume);
724 static void soc_resume_init(struct snd_soc_card *card)
726 /* deferred resume work */
727 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
730 #define snd_soc_suspend NULL
731 #define snd_soc_resume NULL
732 static inline void soc_resume_init(struct snd_soc_card *card)
737 static struct device_node
738 *soc_component_to_node(struct snd_soc_component *component)
740 struct device_node *of_node;
742 of_node = component->dev->of_node;
743 if (!of_node && component->dev->parent)
744 of_node = component->dev->parent->of_node;
749 static int snd_soc_is_matching_component(
750 const struct snd_soc_dai_link_component *dlc,
751 struct snd_soc_component *component)
753 struct device_node *component_of_node;
758 component_of_node = soc_component_to_node(component);
760 if (dlc->of_node && component_of_node != dlc->of_node)
762 if (dlc->name && strcmp(component->name, dlc->name))
768 static struct snd_soc_component *soc_find_component(
769 const struct snd_soc_dai_link_component *dlc)
771 struct snd_soc_component *component;
773 lockdep_assert_held(&client_mutex);
778 * It returns *1st* found component, but some driver
779 * has few components by same of_node/name
781 * CPU component and generic DMAEngine component
783 for_each_component(component)
784 if (snd_soc_is_matching_component(dlc, component))
791 * snd_soc_find_dai - Find a registered DAI
793 * @dlc: name of the DAI or the DAI driver and optional component info to match
795 * This function will search all registered components and their DAIs to
796 * find the DAI of the same name. The component's of_node and name
797 * should also match if being specified.
799 * Return: pointer of DAI, or NULL if not found.
801 struct snd_soc_dai *snd_soc_find_dai(
802 const struct snd_soc_dai_link_component *dlc)
804 struct snd_soc_component *component;
805 struct snd_soc_dai *dai;
807 lockdep_assert_held(&client_mutex);
809 /* Find CPU DAI from registered DAIs */
810 for_each_component(component) {
811 if (!snd_soc_is_matching_component(dlc, component))
813 for_each_component_dais(component, dai) {
814 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
815 && (!dai->driver->name
816 || strcmp(dai->driver->name, dlc->dai_name)))
825 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
827 struct snd_soc_dai *snd_soc_find_dai_with_mutex(
828 const struct snd_soc_dai_link_component *dlc)
830 struct snd_soc_dai *dai;
832 mutex_lock(&client_mutex);
833 dai = snd_soc_find_dai(dlc);
834 mutex_unlock(&client_mutex);
838 EXPORT_SYMBOL_GPL(snd_soc_find_dai_with_mutex);
840 static int soc_dai_link_sanity_check(struct snd_soc_card *card,
841 struct snd_soc_dai_link *link)
844 struct snd_soc_dai_link_component *cpu, *codec, *platform;
846 for_each_link_codecs(link, i, codec) {
848 * Codec must be specified by 1 of name or OF node,
849 * not both or neither.
851 if (!!codec->name == !!codec->of_node) {
852 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
857 /* Codec DAI name must be specified */
858 if (!codec->dai_name) {
859 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
865 * Defer card registration if codec component is not added to
868 if (!soc_find_component(codec)) {
870 "ASoC: codec component %s not found for link %s\n",
871 codec->name, link->name);
872 return -EPROBE_DEFER;
876 for_each_link_platforms(link, i, platform) {
878 * Platform may be specified by either name or OF node, but it
879 * can be left unspecified, then no components will be inserted
882 if (!!platform->name == !!platform->of_node) {
884 "ASoC: Neither/both platform name/of_node are set for %s\n",
890 * Defer card registration if platform component is not added to
893 if (!soc_find_component(platform)) {
895 "ASoC: platform component %s not found for link %s\n",
896 platform->name, link->name);
897 return -EPROBE_DEFER;
901 for_each_link_cpus(link, i, cpu) {
903 * CPU device may be specified by either name or OF node, but
904 * can be left unspecified, and will be matched based on DAI
907 if (cpu->name && cpu->of_node) {
909 "ASoC: Neither/both cpu name/of_node are set for %s\n",
915 * Defer card registration if cpu dai component is not added to
918 if ((cpu->of_node || cpu->name) &&
919 !soc_find_component(cpu)) {
921 "ASoC: cpu component %s not found for link %s\n",
922 cpu->name, link->name);
923 return -EPROBE_DEFER;
927 * At least one of CPU DAI name or CPU device name/node must be
930 if (!cpu->dai_name &&
931 !(cpu->name || cpu->of_node)) {
933 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
943 * snd_soc_remove_pcm_runtime - Remove a pcm_runtime from card
944 * @card: The ASoC card to which the pcm_runtime has
945 * @rtd: The pcm_runtime to remove
947 * This function removes a pcm_runtime from the ASoC card.
949 void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
950 struct snd_soc_pcm_runtime *rtd)
952 lockdep_assert_held(&client_mutex);
954 /* release machine specific resources */
955 snd_soc_link_exit(rtd);
958 * Notify the machine driver for extra destruction
960 snd_soc_card_remove_dai_link(card, rtd->dai_link);
962 soc_free_pcm_runtime(rtd);
964 EXPORT_SYMBOL_GPL(snd_soc_remove_pcm_runtime);
967 * snd_soc_add_pcm_runtime - Add a pcm_runtime dynamically via dai_link
968 * @card: The ASoC card to which the pcm_runtime is added
969 * @dai_link: The DAI link to find pcm_runtime
971 * This function adds a pcm_runtime ASoC card by using dai_link.
973 * Note: Topology can use this API to add pcm_runtime when probing the
974 * topology component. And machine drivers can still define static
975 * DAI links in dai_link array.
977 int snd_soc_add_pcm_runtime(struct snd_soc_card *card,
978 struct snd_soc_dai_link *dai_link)
980 struct snd_soc_pcm_runtime *rtd;
981 struct snd_soc_dai_link_component *codec, *platform, *cpu;
982 struct snd_soc_component *component;
985 lockdep_assert_held(&client_mutex);
988 * Notify the machine driver for extra initialization
990 ret = snd_soc_card_add_dai_link(card, dai_link);
994 if (dai_link->ignore)
997 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
999 ret = soc_dai_link_sanity_check(card, dai_link);
1003 rtd = soc_new_pcm_runtime(card, dai_link);
1007 for_each_link_cpus(dai_link, i, cpu) {
1008 asoc_rtd_to_cpu(rtd, i) = snd_soc_find_dai(cpu);
1009 if (!asoc_rtd_to_cpu(rtd, i)) {
1010 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1014 snd_soc_rtd_add_component(rtd, asoc_rtd_to_cpu(rtd, i)->component);
1017 /* Find CODEC from registered CODECs */
1018 for_each_link_codecs(dai_link, i, codec) {
1019 asoc_rtd_to_codec(rtd, i) = snd_soc_find_dai(codec);
1020 if (!asoc_rtd_to_codec(rtd, i)) {
1021 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
1026 snd_soc_rtd_add_component(rtd, asoc_rtd_to_codec(rtd, i)->component);
1029 /* Find PLATFORM from registered PLATFORMs */
1030 for_each_link_platforms(dai_link, i, platform) {
1031 for_each_component(component) {
1032 if (!snd_soc_is_matching_component(platform, component))
1035 snd_soc_rtd_add_component(rtd, component);
1042 snd_soc_remove_pcm_runtime(card, rtd);
1043 return -EPROBE_DEFER;
1045 EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtime);
1047 static int soc_init_pcm_runtime(struct snd_soc_card *card,
1048 struct snd_soc_pcm_runtime *rtd)
1050 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1051 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
1052 struct snd_soc_component *component;
1055 /* set default power off timeout */
1056 rtd->pmdown_time = pmdown_time;
1058 /* do machine specific initialization */
1059 ret = snd_soc_link_init(rtd);
1063 if (dai_link->dai_fmt) {
1064 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1069 /* add DPCM sysfs entries */
1070 soc_dpcm_debugfs_add(rtd);
1075 * most drivers will register their PCMs using DAI link ordering but
1076 * topology based drivers can use the DAI link id field to set PCM
1077 * device number and then use rtd + a base offset of the BEs.
1079 for_each_rtd_components(rtd, i, component) {
1080 if (!component->driver->use_dai_pcm_id)
1083 if (rtd->dai_link->no_pcm)
1084 num += component->driver->be_pcm_base;
1086 num = rtd->dai_link->id;
1089 /* create compress_device if possible */
1090 ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1091 if (ret != -ENOTSUPP) {
1093 dev_err(card->dev, "ASoC: can't create compress %s\n",
1094 dai_link->stream_name);
1098 /* create the pcm */
1099 ret = soc_new_pcm(rtd, num);
1101 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1102 dai_link->stream_name, ret);
1106 return snd_soc_pcm_dai_new(rtd);
1109 static void soc_set_name_prefix(struct snd_soc_card *card,
1110 struct snd_soc_component *component)
1112 struct device_node *of_node = soc_component_to_node(component);
1116 for (i = 0; i < card->num_configs; i++) {
1117 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1119 if (snd_soc_is_matching_component(&map->dlc, component) &&
1121 component->name_prefix = map->name_prefix;
1127 * If there is no configuration table or no match in the table,
1128 * check if a prefix is provided in the node
1130 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1134 component->name_prefix = str;
1137 static void soc_remove_component(struct snd_soc_component *component,
1141 if (!component->card)
1145 snd_soc_component_remove(component);
1147 /* For framework level robustness */
1148 snd_soc_component_set_jack(component, NULL, NULL);
1150 list_del_init(&component->card_list);
1151 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1152 soc_cleanup_component_debugfs(component);
1153 component->card = NULL;
1154 snd_soc_component_module_put_when_remove(component);
1157 static int soc_probe_component(struct snd_soc_card *card,
1158 struct snd_soc_component *component)
1160 struct snd_soc_dapm_context *dapm =
1161 snd_soc_component_get_dapm(component);
1162 struct snd_soc_dai *dai;
1166 if (!strcmp(component->name, "snd-soc-dummy"))
1169 if (component->card) {
1170 if (component->card != card) {
1171 dev_err(component->dev,
1172 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1173 card->name, component->card->name);
1179 ret = snd_soc_component_module_get_when_probe(component);
1183 component->card = card;
1184 soc_set_name_prefix(card, component);
1186 soc_init_component_debugfs(component);
1188 snd_soc_dapm_init(dapm, card, component);
1190 ret = snd_soc_dapm_new_controls(dapm,
1191 component->driver->dapm_widgets,
1192 component->driver->num_dapm_widgets);
1195 dev_err(component->dev,
1196 "Failed to create new controls %d\n", ret);
1200 for_each_component_dais(component, dai) {
1201 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1203 dev_err(component->dev,
1204 "Failed to create DAI widgets %d\n", ret);
1209 ret = snd_soc_component_probe(component);
1211 dev_err(component->dev,
1212 "ASoC: failed to probe component %d\n", ret);
1215 WARN(dapm->idle_bias_off &&
1216 dapm->bias_level != SND_SOC_BIAS_OFF,
1217 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1222 * machine specific init
1224 * snd_soc_component_set_aux()
1226 ret = snd_soc_component_init(component);
1230 ret = snd_soc_add_component_controls(component,
1231 component->driver->controls,
1232 component->driver->num_controls);
1236 ret = snd_soc_dapm_add_routes(dapm,
1237 component->driver->dapm_routes,
1238 component->driver->num_dapm_routes);
1240 if (card->disable_route_checks) {
1242 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1246 "%s: snd_soc_dapm_add_routes failed: %d\n",
1252 /* see for_each_card_components */
1253 list_add(&component->card_list, &card->component_dev_list);
1257 soc_remove_component(component, probed);
1262 static void soc_remove_link_dais(struct snd_soc_card *card)
1264 struct snd_soc_pcm_runtime *rtd;
1267 for_each_comp_order(order) {
1268 for_each_card_rtds(card, rtd) {
1269 /* remove all rtd connected DAIs in good order */
1270 snd_soc_pcm_dai_remove(rtd, order);
1275 static int soc_probe_link_dais(struct snd_soc_card *card)
1277 struct snd_soc_pcm_runtime *rtd;
1280 for_each_comp_order(order) {
1281 for_each_card_rtds(card, rtd) {
1284 "ASoC: probe %s dai link %d late %d\n",
1285 card->name, rtd->num, order);
1287 /* probe all rtd connected DAIs in good order */
1288 ret = snd_soc_pcm_dai_probe(rtd, order);
1297 static void soc_remove_link_components(struct snd_soc_card *card)
1299 struct snd_soc_component *component;
1300 struct snd_soc_pcm_runtime *rtd;
1303 for_each_comp_order(order) {
1304 for_each_card_rtds(card, rtd) {
1305 for_each_rtd_components(rtd, i, component) {
1306 if (component->driver->remove_order != order)
1309 soc_remove_component(component, 1);
1315 static int soc_probe_link_components(struct snd_soc_card *card)
1317 struct snd_soc_component *component;
1318 struct snd_soc_pcm_runtime *rtd;
1321 for_each_comp_order(order) {
1322 for_each_card_rtds(card, rtd) {
1323 for_each_rtd_components(rtd, i, component) {
1324 if (component->driver->probe_order != order)
1327 ret = soc_probe_component(card, component);
1337 static void soc_unbind_aux_dev(struct snd_soc_card *card)
1339 struct snd_soc_component *component, *_component;
1341 for_each_card_auxs_safe(card, component, _component) {
1342 /* for snd_soc_component_init() */
1343 snd_soc_component_set_aux(component, NULL);
1344 list_del(&component->card_aux_list);
1348 static int soc_bind_aux_dev(struct snd_soc_card *card)
1350 struct snd_soc_component *component;
1351 struct snd_soc_aux_dev *aux;
1354 for_each_card_pre_auxs(card, i, aux) {
1355 /* codecs, usually analog devices */
1356 component = soc_find_component(&aux->dlc);
1358 return -EPROBE_DEFER;
1360 /* for snd_soc_component_init() */
1361 snd_soc_component_set_aux(component, aux);
1362 /* see for_each_card_auxs */
1363 list_add(&component->card_aux_list, &card->aux_comp_list);
1368 static int soc_probe_aux_devices(struct snd_soc_card *card)
1370 struct snd_soc_component *component;
1374 for_each_comp_order(order) {
1375 for_each_card_auxs(card, component) {
1376 if (component->driver->probe_order != order)
1379 ret = soc_probe_component(card, component);
1388 static void soc_remove_aux_devices(struct snd_soc_card *card)
1390 struct snd_soc_component *comp, *_comp;
1393 for_each_comp_order(order) {
1394 for_each_card_auxs_safe(card, comp, _comp) {
1395 if (comp->driver->remove_order == order)
1396 soc_remove_component(comp, 1);
1402 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1403 * @rtd: The runtime for which the DAI link format should be changed
1404 * @dai_fmt: The new DAI link format
1406 * This function updates the DAI link format for all DAIs connected to the DAI
1407 * link for the specified runtime.
1409 * Note: For setups with a static format set the dai_fmt field in the
1410 * corresponding snd_dai_link struct instead of using this function.
1412 * Returns 0 on success, otherwise a negative error code.
1414 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1415 unsigned int dai_fmt)
1417 struct snd_soc_dai *cpu_dai;
1418 struct snd_soc_dai *codec_dai;
1419 unsigned int inv_dai_fmt;
1423 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1424 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1425 if (ret != 0 && ret != -ENOTSUPP) {
1426 dev_warn(codec_dai->dev,
1427 "ASoC: Failed to set DAI format: %d\n", ret);
1433 * Flip the polarity for the "CPU" end of a CODEC<->CODEC link
1434 * the component which has non_legacy_dai_naming is Codec
1436 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1437 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1438 case SND_SOC_DAIFMT_CBM_CFM:
1439 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1441 case SND_SOC_DAIFMT_CBM_CFS:
1442 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1444 case SND_SOC_DAIFMT_CBS_CFM:
1445 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1447 case SND_SOC_DAIFMT_CBS_CFS:
1448 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1451 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1452 unsigned int fmt = dai_fmt;
1454 if (cpu_dai->component->driver->non_legacy_dai_naming)
1457 ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
1458 if (ret != 0 && ret != -ENOTSUPP) {
1459 dev_warn(cpu_dai->dev,
1460 "ASoC: Failed to set DAI format: %d\n", ret);
1467 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1471 * If a DMI filed contain strings in this blacklist (e.g.
1472 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
1473 * as invalid and dropped when setting the card long name from DMI info.
1475 static const char * const dmi_blacklist[] = {
1476 "To be filled by OEM",
1479 "Board Manufacturer",
1480 "Board Vendor Name",
1481 "Board Product Name",
1482 NULL, /* terminator */
1486 * Trim special characters, and replace '-' with '_' since '-' is used to
1487 * separate different DMI fields in the card long name. Only number and
1488 * alphabet characters and a few separator characters are kept.
1490 static void cleanup_dmi_name(char *name)
1494 for (i = 0; name[i]; i++) {
1495 if (isalnum(name[i]) || (name[i] == '.')
1496 || (name[i] == '_'))
1497 name[j++] = name[i];
1498 else if (name[i] == '-')
1506 * Check if a DMI field is valid, i.e. not containing any string
1507 * in the black list.
1509 static int is_dmi_valid(const char *field)
1513 while (dmi_blacklist[i]) {
1514 if (strstr(field, dmi_blacklist[i]))
1523 * Append a string to card->dmi_longname with character cleanups.
1525 static void append_dmi_string(struct snd_soc_card *card, const char *str)
1527 char *dst = card->dmi_longname;
1528 size_t dst_len = sizeof(card->dmi_longname);
1532 snprintf(dst + len, dst_len - len, "-%s", str);
1534 len++; /* skip the separator "-" */
1536 cleanup_dmi_name(dst + len);
1540 * snd_soc_set_dmi_name() - Register DMI names to card
1541 * @card: The card to register DMI names
1542 * @flavour: The flavour "differentiator" for the card amongst its peers.
1544 * An Intel machine driver may be used by many different devices but are
1545 * difficult for userspace to differentiate, since machine drivers ususally
1546 * use their own name as the card short name and leave the card long name
1547 * blank. To differentiate such devices and fix bugs due to lack of
1548 * device-specific configurations, this function allows DMI info to be used
1549 * as the sound card long name, in the format of
1550 * "vendor-product-version-board"
1551 * (Character '-' is used to separate different DMI fields here).
1552 * This will help the user space to load the device-specific Use Case Manager
1553 * (UCM) configurations for the card.
1555 * Possible card long names may be:
1556 * DellInc.-XPS139343-01-0310JH
1557 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1558 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1560 * This function also supports flavoring the card longname to provide
1561 * the extra differentiation, like "vendor-product-version-board-flavor".
1563 * We only keep number and alphabet characters and a few separator characters
1564 * in the card long name since UCM in the user space uses the card long names
1565 * as card configuration directory names and AudoConf cannot support special
1566 * charactors like SPACE.
1568 * Returns 0 on success, otherwise a negative error code.
1570 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1572 const char *vendor, *product, *product_version, *board;
1574 if (card->long_name)
1575 return 0; /* long name already set by driver or from DMI */
1577 if (!is_acpi_device_node(card->dev->fwnode))
1580 /* make up dmi long name as: vendor-product-version-board */
1581 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1582 if (!vendor || !is_dmi_valid(vendor)) {
1583 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1587 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1588 cleanup_dmi_name(card->dmi_longname);
1590 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1591 if (product && is_dmi_valid(product)) {
1592 append_dmi_string(card, product);
1595 * some vendors like Lenovo may only put a self-explanatory
1596 * name in the product version field
1598 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1599 if (product_version && is_dmi_valid(product_version))
1600 append_dmi_string(card, product_version);
1603 board = dmi_get_system_info(DMI_BOARD_NAME);
1604 if (board && is_dmi_valid(board)) {
1605 if (!product || strcasecmp(board, product))
1606 append_dmi_string(card, board);
1607 } else if (!product) {
1608 /* fall back to using legacy name */
1609 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1613 /* Add flavour to dmi long name */
1615 append_dmi_string(card, flavour);
1617 /* set the card long name */
1618 card->long_name = card->dmi_longname;
1622 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1623 #endif /* CONFIG_DMI */
1625 static void soc_check_tplg_fes(struct snd_soc_card *card)
1627 struct snd_soc_component *component;
1628 const struct snd_soc_component_driver *comp_drv;
1629 struct snd_soc_dai_link *dai_link;
1632 for_each_component(component) {
1634 /* does this component override BEs ? */
1635 if (!component->driver->ignore_machine)
1638 /* for this machine ? */
1639 if (!strcmp(component->driver->ignore_machine,
1640 card->dev->driver->name))
1642 if (strcmp(component->driver->ignore_machine,
1643 dev_name(card->dev)))
1646 /* machine matches, so override the rtd data */
1647 for_each_card_prelinks(card, i, dai_link) {
1649 /* ignore this FE */
1650 if (dai_link->dynamic) {
1651 dai_link->ignore = true;
1655 dev_dbg(card->dev, "info: override BE DAI link %s\n",
1656 card->dai_link[i].name);
1658 /* override platform component */
1659 if (!dai_link->platforms) {
1660 dev_err(card->dev, "init platform error");
1663 dai_link->platforms->name = component->name;
1665 /* convert non BE into BE */
1666 if (!dai_link->no_pcm) {
1667 dai_link->no_pcm = 1;
1669 if (dai_link->dpcm_playback)
1671 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_playback=1\n",
1673 if (dai_link->dpcm_capture)
1675 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_capture=1\n",
1678 /* convert normal link into DPCM one */
1679 if (!(dai_link->dpcm_playback ||
1680 dai_link->dpcm_capture)) {
1681 dai_link->dpcm_playback = !dai_link->capture_only;
1682 dai_link->dpcm_capture = !dai_link->playback_only;
1687 * override any BE fixups
1689 * snd_soc_link_be_hw_params_fixup()
1691 dai_link->be_hw_params_fixup =
1692 component->driver->be_hw_params_fixup;
1695 * most BE links don't set stream name, so set it to
1696 * dai link name if it's NULL to help bind widgets.
1698 if (!dai_link->stream_name)
1699 dai_link->stream_name = dai_link->name;
1702 /* Inform userspace we are using alternate topology */
1703 if (component->driver->topology_name_prefix) {
1705 /* topology shortname created? */
1706 if (!card->topology_shortname_created) {
1707 comp_drv = component->driver;
1709 snprintf(card->topology_shortname, 32, "%s-%s",
1710 comp_drv->topology_name_prefix,
1712 card->topology_shortname_created = true;
1715 /* use topology shortname */
1716 card->name = card->topology_shortname;
1721 #define soc_setup_card_name(name, name1, name2, norm) \
1722 __soc_setup_card_name(name, sizeof(name), name1, name2, norm)
1723 static void __soc_setup_card_name(char *name, int len,
1724 const char *name1, const char *name2,
1729 snprintf(name, len, "%s", name1 ? name1 : name2);
1735 * Name normalization
1737 * The driver name is somewhat special, as it's used as a key for
1738 * searches in the user-space.
1741 * "abcd??efg" -> "abcd__efg"
1743 for (i = 0; i < len; i++) {
1750 if (!isalnum(name[i]))
1757 static void soc_cleanup_card_resources(struct snd_soc_card *card)
1759 struct snd_soc_pcm_runtime *rtd, *n;
1762 snd_card_disconnect_sync(card->snd_card);
1764 snd_soc_dapm_shutdown(card);
1766 /* remove and free each DAI */
1767 soc_remove_link_dais(card);
1768 soc_remove_link_components(card);
1770 for_each_card_rtds_safe(card, rtd, n)
1771 snd_soc_remove_pcm_runtime(card, rtd);
1773 /* remove auxiliary devices */
1774 soc_remove_aux_devices(card);
1775 soc_unbind_aux_dev(card);
1777 snd_soc_dapm_free(&card->dapm);
1778 soc_cleanup_card_debugfs(card);
1780 /* remove the card */
1781 snd_soc_card_remove(card);
1783 if (card->snd_card) {
1784 snd_card_free(card->snd_card);
1785 card->snd_card = NULL;
1789 static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
1791 if (card->instantiated) {
1792 card->instantiated = false;
1793 snd_soc_flush_all_delayed_work(card);
1795 soc_cleanup_card_resources(card);
1797 list_add(&card->list, &unbind_card_list);
1800 list_del(&card->list);
1804 static int snd_soc_bind_card(struct snd_soc_card *card)
1806 struct snd_soc_pcm_runtime *rtd;
1807 struct snd_soc_component *component;
1808 struct snd_soc_dai_link *dai_link;
1811 mutex_lock(&client_mutex);
1812 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1814 snd_soc_dapm_init(&card->dapm, card, NULL);
1816 /* check whether any platform is ignore machine FE and using topology */
1817 soc_check_tplg_fes(card);
1819 /* bind aux_devs too */
1820 ret = soc_bind_aux_dev(card);
1824 /* add predefined DAI links to the list */
1826 for_each_card_prelinks(card, i, dai_link) {
1827 ret = snd_soc_add_pcm_runtime(card, dai_link);
1832 /* card bind complete so register a sound card */
1833 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1834 card->owner, 0, &card->snd_card);
1837 "ASoC: can't create sound card for card %s: %d\n",
1842 soc_init_card_debugfs(card);
1844 soc_resume_init(card);
1846 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1847 card->num_dapm_widgets);
1851 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
1852 card->num_of_dapm_widgets);
1856 /* initialise the sound card only once */
1857 ret = snd_soc_card_probe(card);
1861 /* probe all components used by DAI links on this card */
1862 ret = soc_probe_link_components(card);
1865 "ASoC: failed to instantiate card %d\n", ret);
1869 /* probe auxiliary components */
1870 ret = soc_probe_aux_devices(card);
1873 "ASoC: failed to probe aux component %d\n", ret);
1877 /* probe all DAI links on this card */
1878 ret = soc_probe_link_dais(card);
1881 "ASoC: failed to instantiate card %d\n", ret);
1885 for_each_card_rtds(card, rtd) {
1886 ret = soc_init_pcm_runtime(card, rtd);
1891 snd_soc_dapm_link_dai_widgets(card);
1892 snd_soc_dapm_connect_dai_link_widgets(card);
1894 ret = snd_soc_add_card_controls(card, card->controls,
1895 card->num_controls);
1899 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1900 card->num_dapm_routes);
1902 if (card->disable_route_checks) {
1904 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1908 "%s: snd_soc_dapm_add_routes failed: %d\n",
1914 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
1915 card->num_of_dapm_routes);
1919 /* try to set some sane longname if DMI is available */
1920 snd_soc_set_dmi_name(card, NULL);
1922 soc_setup_card_name(card->snd_card->shortname,
1923 card->name, NULL, 0);
1924 soc_setup_card_name(card->snd_card->longname,
1925 card->long_name, card->name, 0);
1926 soc_setup_card_name(card->snd_card->driver,
1927 card->driver_name, card->name, 1);
1929 if (card->components) {
1930 /* the current implementation of snd_component_add() accepts */
1931 /* multiple components in the string separated by space, */
1932 /* but the string collision (identical string) check might */
1933 /* not work correctly */
1934 ret = snd_component_add(card->snd_card, card->components);
1936 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
1942 ret = snd_soc_card_late_probe(card);
1946 snd_soc_dapm_new_widgets(card);
1948 ret = snd_card_register(card->snd_card);
1950 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1955 card->instantiated = 1;
1956 dapm_mark_endpoints_dirty(card);
1957 snd_soc_dapm_sync(&card->dapm);
1959 /* deactivate pins to sleep state */
1960 for_each_card_components(card, component)
1961 if (!snd_soc_component_active(component))
1962 pinctrl_pm_select_sleep_state(component->dev);
1966 soc_cleanup_card_resources(card);
1968 mutex_unlock(&card->mutex);
1969 mutex_unlock(&client_mutex);
1974 /* probes a new socdev */
1975 static int soc_probe(struct platform_device *pdev)
1977 struct snd_soc_card *card = platform_get_drvdata(pdev);
1980 * no card, so machine driver should be registering card
1981 * we should not be here in that case so ret error
1986 dev_warn(&pdev->dev,
1987 "ASoC: machine %s should use snd_soc_register_card()\n",
1990 /* Bodge while we unpick instantiation */
1991 card->dev = &pdev->dev;
1993 return devm_snd_soc_register_card(&pdev->dev, card);
1996 int snd_soc_poweroff(struct device *dev)
1998 struct snd_soc_card *card = dev_get_drvdata(dev);
1999 struct snd_soc_component *component;
2001 if (!card->instantiated)
2005 * Flush out pmdown_time work - we actually do want to run it
2006 * now, we're shutting down so no imminent restart.
2008 snd_soc_flush_all_delayed_work(card);
2010 snd_soc_dapm_shutdown(card);
2012 /* deactivate pins to sleep state */
2013 for_each_card_components(card, component)
2014 pinctrl_pm_select_sleep_state(component->dev);
2018 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2020 const struct dev_pm_ops snd_soc_pm_ops = {
2021 .suspend = snd_soc_suspend,
2022 .resume = snd_soc_resume,
2023 .freeze = snd_soc_suspend,
2024 .thaw = snd_soc_resume,
2025 .poweroff = snd_soc_poweroff,
2026 .restore = snd_soc_resume,
2028 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2030 /* ASoC platform driver */
2031 static struct platform_driver soc_driver = {
2033 .name = "soc-audio",
2034 .pm = &snd_soc_pm_ops,
2040 * snd_soc_cnew - create new control
2041 * @_template: control template
2042 * @data: control private data
2043 * @long_name: control long name
2044 * @prefix: control name prefix
2046 * Create a new mixer control from a template control.
2048 * Returns 0 for success, else error.
2050 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2051 void *data, const char *long_name,
2054 struct snd_kcontrol_new template;
2055 struct snd_kcontrol *kcontrol;
2058 memcpy(&template, _template, sizeof(template));
2062 long_name = template.name;
2065 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2069 template.name = name;
2071 template.name = long_name;
2074 kcontrol = snd_ctl_new1(&template, data);
2080 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2082 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2083 const struct snd_kcontrol_new *controls, int num_controls,
2084 const char *prefix, void *data)
2088 for (i = 0; i < num_controls; i++) {
2089 const struct snd_kcontrol_new *control = &controls[i];
2091 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2092 control->name, prefix));
2094 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2095 control->name, err);
2104 * snd_soc_add_component_controls - Add an array of controls to a component.
2106 * @component: Component to add controls to
2107 * @controls: Array of controls to add
2108 * @num_controls: Number of elements in the array
2110 * Return: 0 for success, else error.
2112 int snd_soc_add_component_controls(struct snd_soc_component *component,
2113 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2115 struct snd_card *card = component->card->snd_card;
2117 return snd_soc_add_controls(card, component->dev, controls,
2118 num_controls, component->name_prefix, component);
2120 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2123 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2124 * Convenience function to add a list of controls.
2126 * @soc_card: SoC card to add controls to
2127 * @controls: array of controls to add
2128 * @num_controls: number of elements in the array
2130 * Return 0 for success, else error.
2132 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2133 const struct snd_kcontrol_new *controls, int num_controls)
2135 struct snd_card *card = soc_card->snd_card;
2137 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2140 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2143 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2144 * Convienience function to add a list of controls.
2146 * @dai: DAI to add controls to
2147 * @controls: array of controls to add
2148 * @num_controls: number of elements in the array
2150 * Return 0 for success, else error.
2152 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2153 const struct snd_kcontrol_new *controls, int num_controls)
2155 struct snd_card *card = dai->component->card->snd_card;
2157 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2160 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2163 * snd_soc_register_card - Register a card with the ASoC core
2165 * @card: Card to register
2168 int snd_soc_register_card(struct snd_soc_card *card)
2170 if (!card->name || !card->dev)
2173 dev_set_drvdata(card->dev, card);
2175 INIT_LIST_HEAD(&card->widgets);
2176 INIT_LIST_HEAD(&card->paths);
2177 INIT_LIST_HEAD(&card->dapm_list);
2178 INIT_LIST_HEAD(&card->aux_comp_list);
2179 INIT_LIST_HEAD(&card->component_dev_list);
2180 INIT_LIST_HEAD(&card->list);
2181 INIT_LIST_HEAD(&card->rtd_list);
2182 INIT_LIST_HEAD(&card->dapm_dirty);
2183 INIT_LIST_HEAD(&card->dobj_list);
2185 card->instantiated = 0;
2186 mutex_init(&card->mutex);
2187 mutex_init(&card->dapm_mutex);
2188 mutex_init(&card->pcm_mutex);
2189 spin_lock_init(&card->dpcm_lock);
2191 return snd_soc_bind_card(card);
2193 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2196 * snd_soc_unregister_card - Unregister a card with the ASoC core
2198 * @card: Card to unregister
2201 int snd_soc_unregister_card(struct snd_soc_card *card)
2203 mutex_lock(&client_mutex);
2204 snd_soc_unbind_card(card, true);
2205 mutex_unlock(&client_mutex);
2206 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2210 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2213 * Simplify DAI link configuration by removing ".-1" from device names
2214 * and sanitizing names.
2216 static char *fmt_single_name(struct device *dev, int *id)
2218 const char *devname = dev_name(dev);
2222 if (devname == NULL)
2225 name = devm_kstrdup(dev, devname, GFP_KERNEL);
2227 /* are we a "%s.%d" name (platform and SPI components) */
2228 found = strstr(name, dev->driver->name);
2231 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2233 /* discard ID from name if ID == -1 */
2235 found[strlen(dev->driver->name)] = '\0';
2238 /* I2C component devices are named "bus-addr" */
2239 } else if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2241 /* create unique ID number from I2C addr and bus */
2242 *id = ((id1 & 0xffff) << 16) + id2;
2244 devm_kfree(dev, name);
2246 /* sanitize component name for DAI link creation */
2247 name = devm_kasprintf(dev, GFP_KERNEL, "%s.%s", dev->driver->name, devname);
2256 * Simplify DAI link naming for single devices with multiple DAIs by removing
2257 * any ".-1" and using the DAI name (instead of device name).
2259 static inline char *fmt_multiple_name(struct device *dev,
2260 struct snd_soc_dai_driver *dai_drv)
2262 if (dai_drv->name == NULL) {
2264 "ASoC: error - multiple DAI %s registered with no name\n",
2269 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2272 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2274 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2275 list_del(&dai->list);
2277 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2280 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2282 * @component: The component the DAIs are registered for
2283 * @dai_drv: DAI driver to use for the DAI
2284 * @legacy_dai_naming: if %true, use legacy single-name format;
2285 * if %false, use multiple-name format;
2287 * Topology can use this API to register DAIs when probing a component.
2288 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2289 * will be freed in the component cleanup.
2291 struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2292 struct snd_soc_dai_driver *dai_drv,
2293 bool legacy_dai_naming)
2295 struct device *dev = component->dev;
2296 struct snd_soc_dai *dai;
2298 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2300 lockdep_assert_held(&client_mutex);
2302 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2307 * Back in the old days when we still had component-less DAIs,
2308 * instead of having a static name, component-less DAIs would
2309 * inherit the name of the parent device so it is possible to
2310 * register multiple instances of the DAI. We still need to keep
2311 * the same naming style even though those DAIs are not
2312 * component-less anymore.
2314 if (legacy_dai_naming &&
2315 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2316 dai->name = fmt_single_name(dev, &dai->id);
2318 dai->name = fmt_multiple_name(dev, dai_drv);
2320 dai->id = dai_drv->id;
2322 dai->id = component->num_dai;
2327 dai->component = component;
2329 dai->driver = dai_drv;
2331 /* see for_each_component_dais */
2332 list_add_tail(&dai->list, &component->dai_list);
2333 component->num_dai++;
2335 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2340 * snd_soc_unregister_dais - Unregister DAIs from the ASoC core
2342 * @component: The component for which the DAIs should be unregistered
2344 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2346 struct snd_soc_dai *dai, *_dai;
2348 for_each_component_dais_safe(component, dai, _dai)
2349 snd_soc_unregister_dai(dai);
2353 * snd_soc_register_dais - Register a DAI with the ASoC core
2355 * @component: The component the DAIs are registered for
2356 * @dai_drv: DAI driver to use for the DAIs
2357 * @count: Number of DAIs
2359 static int snd_soc_register_dais(struct snd_soc_component *component,
2360 struct snd_soc_dai_driver *dai_drv,
2363 struct snd_soc_dai *dai;
2367 for (i = 0; i < count; i++) {
2368 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2369 !component->driver->non_legacy_dai_naming);
2379 snd_soc_unregister_dais(component);
2384 #define ENDIANNESS_MAP(name) \
2385 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2386 static u64 endianness_format_map[] = {
2387 ENDIANNESS_MAP(S16_),
2388 ENDIANNESS_MAP(U16_),
2389 ENDIANNESS_MAP(S24_),
2390 ENDIANNESS_MAP(U24_),
2391 ENDIANNESS_MAP(S32_),
2392 ENDIANNESS_MAP(U32_),
2393 ENDIANNESS_MAP(S24_3),
2394 ENDIANNESS_MAP(U24_3),
2395 ENDIANNESS_MAP(S20_3),
2396 ENDIANNESS_MAP(U20_3),
2397 ENDIANNESS_MAP(S18_3),
2398 ENDIANNESS_MAP(U18_3),
2399 ENDIANNESS_MAP(FLOAT_),
2400 ENDIANNESS_MAP(FLOAT64_),
2401 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2405 * Fix up the DAI formats for endianness: codecs don't actually see
2406 * the endianness of the data but we're using the CPU format
2407 * definitions which do need to include endianness so we ensure that
2408 * codec DAIs always have both big and little endian variants set.
2410 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2414 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2415 if (stream->formats & endianness_format_map[i])
2416 stream->formats |= endianness_format_map[i];
2419 static void snd_soc_try_rebind_card(void)
2421 struct snd_soc_card *card, *c;
2423 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2424 if (!snd_soc_bind_card(card))
2425 list_del(&card->list);
2428 static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2430 struct snd_soc_card *card = component->card;
2432 snd_soc_unregister_dais(component);
2435 snd_soc_unbind_card(card, false);
2437 list_del(&component->list);
2440 int snd_soc_component_initialize(struct snd_soc_component *component,
2441 const struct snd_soc_component_driver *driver,
2444 INIT_LIST_HEAD(&component->dai_list);
2445 INIT_LIST_HEAD(&component->dobj_list);
2446 INIT_LIST_HEAD(&component->card_list);
2447 mutex_init(&component->io_mutex);
2449 component->name = fmt_single_name(dev, &component->id);
2450 if (!component->name) {
2451 dev_err(dev, "ASoC: Failed to allocate name\n");
2455 component->dev = dev;
2456 component->driver = driver;
2460 EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
2462 int snd_soc_add_component(struct snd_soc_component *component,
2463 struct snd_soc_dai_driver *dai_drv,
2469 mutex_lock(&client_mutex);
2471 if (component->driver->endianness) {
2472 for (i = 0; i < num_dai; i++) {
2473 convert_endianness_formats(&dai_drv[i].playback);
2474 convert_endianness_formats(&dai_drv[i].capture);
2478 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2480 dev_err(component->dev, "ASoC: Failed to register DAIs: %d\n",
2485 if (!component->driver->write && !component->driver->read) {
2486 if (!component->regmap)
2487 component->regmap = dev_get_regmap(component->dev,
2489 if (component->regmap)
2490 snd_soc_component_setup_regmap(component);
2493 /* see for_each_component */
2494 list_add(&component->list, &component_list);
2498 snd_soc_del_component_unlocked(component);
2500 mutex_unlock(&client_mutex);
2503 snd_soc_try_rebind_card();
2507 EXPORT_SYMBOL_GPL(snd_soc_add_component);
2509 int snd_soc_register_component(struct device *dev,
2510 const struct snd_soc_component_driver *component_driver,
2511 struct snd_soc_dai_driver *dai_drv,
2514 struct snd_soc_component *component;
2517 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2521 ret = snd_soc_component_initialize(component, component_driver, dev);
2525 return snd_soc_add_component(component, dai_drv, num_dai);
2527 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2530 * snd_soc_unregister_component_by_driver - Unregister component using a given driver
2531 * from the ASoC core
2533 * @dev: The device to unregister
2534 * @component_driver: The component driver to unregister
2536 void snd_soc_unregister_component_by_driver(struct device *dev,
2537 const struct snd_soc_component_driver *component_driver)
2539 struct snd_soc_component *component;
2541 if (!component_driver)
2544 mutex_lock(&client_mutex);
2545 component = snd_soc_lookup_component_nolocked(dev, component_driver->name);
2549 snd_soc_del_component_unlocked(component);
2552 mutex_unlock(&client_mutex);
2554 EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
2557 * snd_soc_unregister_component - Unregister all related component
2558 * from the ASoC core
2560 * @dev: The device to unregister
2562 void snd_soc_unregister_component(struct device *dev)
2564 struct snd_soc_component *component;
2566 mutex_lock(&client_mutex);
2568 component = snd_soc_lookup_component_nolocked(dev, NULL);
2572 snd_soc_del_component_unlocked(component);
2574 mutex_unlock(&client_mutex);
2576 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2578 /* Retrieve a card's name from device tree */
2579 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2580 const char *propname)
2582 struct device_node *np;
2586 pr_err("card->dev is not set before calling %s\n", __func__);
2590 np = card->dev->of_node;
2592 ret = of_property_read_string_index(np, propname, 0, &card->name);
2594 * EINVAL means the property does not exist. This is fine providing
2595 * card->name was previously set, which is checked later in
2596 * snd_soc_register_card.
2598 if (ret < 0 && ret != -EINVAL) {
2600 "ASoC: Property '%s' could not be read: %d\n",
2607 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2609 static const struct snd_soc_dapm_widget simple_widgets[] = {
2610 SND_SOC_DAPM_MIC("Microphone", NULL),
2611 SND_SOC_DAPM_LINE("Line", NULL),
2612 SND_SOC_DAPM_HP("Headphone", NULL),
2613 SND_SOC_DAPM_SPK("Speaker", NULL),
2616 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2617 const char *propname)
2619 struct device_node *np = card->dev->of_node;
2620 struct snd_soc_dapm_widget *widgets;
2621 const char *template, *wname;
2622 int i, j, num_widgets, ret;
2624 num_widgets = of_property_count_strings(np, propname);
2625 if (num_widgets < 0) {
2627 "ASoC: Property '%s' does not exist\n", propname);
2630 if (num_widgets & 1) {
2632 "ASoC: Property '%s' length is not even\n", propname);
2638 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2643 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2647 "ASoC: Could not allocate memory for widgets\n");
2651 for (i = 0; i < num_widgets; i++) {
2652 ret = of_property_read_string_index(np, propname,
2656 "ASoC: Property '%s' index %d read error:%d\n",
2657 propname, 2 * i, ret);
2661 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
2662 if (!strncmp(template, simple_widgets[j].name,
2663 strlen(simple_widgets[j].name))) {
2664 widgets[i] = simple_widgets[j];
2669 if (j >= ARRAY_SIZE(simple_widgets)) {
2671 "ASoC: DAPM widget '%s' is not supported\n",
2676 ret = of_property_read_string_index(np, propname,
2681 "ASoC: Property '%s' index %d read error:%d\n",
2682 propname, (2 * i) + 1, ret);
2686 widgets[i].name = wname;
2689 card->of_dapm_widgets = widgets;
2690 card->num_of_dapm_widgets = num_widgets;
2694 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
2696 int snd_soc_of_get_slot_mask(struct device_node *np,
2697 const char *prop_name,
2701 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
2707 for (i = 0; i < val; i++)
2708 if (be32_to_cpup(&of_slot_mask[i]))
2713 EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
2715 int snd_soc_of_parse_tdm_slot(struct device_node *np,
2716 unsigned int *tx_mask,
2717 unsigned int *rx_mask,
2718 unsigned int *slots,
2719 unsigned int *slot_width)
2725 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
2727 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
2729 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
2730 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
2738 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
2739 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
2749 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
2751 void snd_soc_of_parse_node_prefix(struct device_node *np,
2752 struct snd_soc_codec_conf *codec_conf,
2753 struct device_node *of_node,
2754 const char *propname)
2759 ret = of_property_read_string(np, propname, &str);
2761 /* no prefix is not error */
2765 codec_conf->dlc.of_node = of_node;
2766 codec_conf->name_prefix = str;
2768 EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
2770 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
2771 const char *propname)
2773 struct device_node *np = card->dev->of_node;
2775 struct snd_soc_dapm_route *routes;
2778 num_routes = of_property_count_strings(np, propname);
2779 if (num_routes < 0 || num_routes & 1) {
2781 "ASoC: Property '%s' does not exist or its length is not even\n",
2787 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2792 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
2796 "ASoC: Could not allocate DAPM route table\n");
2800 for (i = 0; i < num_routes; i++) {
2801 ret = of_property_read_string_index(np, propname,
2802 2 * i, &routes[i].sink);
2805 "ASoC: Property '%s' index %d could not be read: %d\n",
2806 propname, 2 * i, ret);
2809 ret = of_property_read_string_index(np, propname,
2810 (2 * i) + 1, &routes[i].source);
2813 "ASoC: Property '%s' index %d could not be read: %d\n",
2814 propname, (2 * i) + 1, ret);
2819 card->num_of_dapm_routes = num_routes;
2820 card->of_dapm_routes = routes;
2824 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
2826 int snd_soc_of_parse_aux_devs(struct snd_soc_card *card, const char *propname)
2828 struct device_node *node = card->dev->of_node;
2829 struct snd_soc_aux_dev *aux;
2832 num = of_count_phandle_with_args(node, propname, NULL);
2833 if (num == -ENOENT) {
2835 } else if (num < 0) {
2836 dev_err(card->dev, "ASOC: Property '%s' could not be read: %d\n",
2841 aux = devm_kcalloc(card->dev, num, sizeof(*aux), GFP_KERNEL);
2844 card->aux_dev = aux;
2845 card->num_aux_devs = num;
2847 for_each_card_pre_auxs(card, i, aux) {
2848 aux->dlc.of_node = of_parse_phandle(node, propname, i);
2849 if (!aux->dlc.of_node)
2855 EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs);
2857 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
2859 struct device_node **bitclkmaster,
2860 struct device_node **framemaster)
2864 unsigned int format = 0;
2870 } of_fmt_table[] = {
2871 { "i2s", SND_SOC_DAIFMT_I2S },
2872 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
2873 { "left_j", SND_SOC_DAIFMT_LEFT_J },
2874 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
2875 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
2876 { "ac97", SND_SOC_DAIFMT_AC97 },
2877 { "pdm", SND_SOC_DAIFMT_PDM},
2878 { "msb", SND_SOC_DAIFMT_MSB },
2879 { "lsb", SND_SOC_DAIFMT_LSB },
2886 * check "dai-format = xxx"
2887 * or "[prefix]format = xxx"
2888 * SND_SOC_DAIFMT_FORMAT_MASK area
2890 ret = of_property_read_string(np, "dai-format", &str);
2892 snprintf(prop, sizeof(prop), "%sformat", prefix);
2893 ret = of_property_read_string(np, prop, &str);
2896 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
2897 if (strcmp(str, of_fmt_table[i].name) == 0) {
2898 format |= of_fmt_table[i].val;
2905 * check "[prefix]continuous-clock"
2906 * SND_SOC_DAIFMT_CLOCK_MASK area
2908 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
2909 if (of_property_read_bool(np, prop))
2910 format |= SND_SOC_DAIFMT_CONT;
2912 format |= SND_SOC_DAIFMT_GATED;
2915 * check "[prefix]bitclock-inversion"
2916 * check "[prefix]frame-inversion"
2917 * SND_SOC_DAIFMT_INV_MASK area
2919 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
2920 bit = !!of_get_property(np, prop, NULL);
2922 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
2923 frame = !!of_get_property(np, prop, NULL);
2925 switch ((bit << 4) + frame) {
2927 format |= SND_SOC_DAIFMT_IB_IF;
2930 format |= SND_SOC_DAIFMT_IB_NF;
2933 format |= SND_SOC_DAIFMT_NB_IF;
2936 /* SND_SOC_DAIFMT_NB_NF is default */
2941 * check "[prefix]bitclock-master"
2942 * check "[prefix]frame-master"
2943 * SND_SOC_DAIFMT_MASTER_MASK area
2945 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
2946 bit = !!of_get_property(np, prop, NULL);
2947 if (bit && bitclkmaster)
2948 *bitclkmaster = of_parse_phandle(np, prop, 0);
2950 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
2951 frame = !!of_get_property(np, prop, NULL);
2952 if (frame && framemaster)
2953 *framemaster = of_parse_phandle(np, prop, 0);
2955 switch ((bit << 4) + frame) {
2957 format |= SND_SOC_DAIFMT_CBM_CFM;
2960 format |= SND_SOC_DAIFMT_CBM_CFS;
2963 format |= SND_SOC_DAIFMT_CBS_CFM;
2966 format |= SND_SOC_DAIFMT_CBS_CFS;
2972 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
2974 int snd_soc_get_dai_id(struct device_node *ep)
2976 struct snd_soc_component *component;
2977 struct snd_soc_dai_link_component dlc;
2980 dlc.of_node = of_graph_get_port_parent(ep);
2983 * For example HDMI case, HDMI has video/sound port,
2984 * but ALSA SoC needs sound port number only.
2985 * Thus counting HDMI DT port/endpoint doesn't work.
2986 * Then, it should have .of_xlate_dai_id
2989 mutex_lock(&client_mutex);
2990 component = soc_find_component(&dlc);
2992 ret = snd_soc_component_of_xlate_dai_id(component, ep);
2993 mutex_unlock(&client_mutex);
2995 of_node_put(dlc.of_node);
2999 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3001 int snd_soc_get_dai_name(struct of_phandle_args *args,
3002 const char **dai_name)
3004 struct snd_soc_component *pos;
3005 struct device_node *component_of_node;
3006 int ret = -EPROBE_DEFER;
3008 mutex_lock(&client_mutex);
3009 for_each_component(pos) {
3010 component_of_node = soc_component_to_node(pos);
3012 if (component_of_node != args->np)
3015 ret = snd_soc_component_of_xlate_dai_name(pos, args, dai_name);
3016 if (ret == -ENOTSUPP) {
3017 struct snd_soc_dai *dai;
3020 switch (args->args_count) {
3022 id = 0; /* same as dai_drv[0] */
3032 if (id < 0 || id >= pos->num_dai) {
3039 /* find target DAI */
3040 for_each_component_dais(pos, dai) {
3046 *dai_name = dai->driver->name;
3048 *dai_name = pos->name;
3051 * if another error than ENOTSUPP is returned go on and
3052 * check if another component is provided with the same
3053 * node. This may happen if a device provides several
3061 mutex_unlock(&client_mutex);
3064 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3066 int snd_soc_of_get_dai_name(struct device_node *of_node,
3067 const char **dai_name)
3069 struct of_phandle_args args;
3072 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3073 "#sound-dai-cells", 0, &args);
3077 ret = snd_soc_get_dai_name(&args, dai_name);
3079 of_node_put(args.np);
3083 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3086 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3087 * @dai_link: DAI link
3089 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3091 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3093 struct snd_soc_dai_link_component *component;
3096 for_each_link_codecs(dai_link, index, component) {
3097 if (!component->of_node)
3099 of_node_put(component->of_node);
3100 component->of_node = NULL;
3103 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3106 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3108 * @of_node: Device node
3109 * @dai_link: DAI link
3111 * Builds an array of CODEC DAI components from the DAI link property
3113 * The array is set in the DAI link and the number of DAIs is set accordingly.
3114 * The device nodes in the array (of_node) must be dereferenced by calling
3115 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3117 * Returns 0 for success
3119 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3120 struct device_node *of_node,
3121 struct snd_soc_dai_link *dai_link)
3123 struct of_phandle_args args;
3124 struct snd_soc_dai_link_component *component;
3126 int index, num_codecs, ret;
3128 /* Count the number of CODECs */
3130 num_codecs = of_count_phandle_with_args(of_node, name,
3131 "#sound-dai-cells");
3132 if (num_codecs <= 0) {
3133 if (num_codecs == -ENOENT)
3134 dev_err(dev, "No 'sound-dai' property\n");
3136 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3139 component = devm_kcalloc(dev,
3140 num_codecs, sizeof(*component),
3144 dai_link->codecs = component;
3145 dai_link->num_codecs = num_codecs;
3147 /* Parse the list */
3148 for_each_link_codecs(dai_link, index, component) {
3149 ret = of_parse_phandle_with_args(of_node, name,
3154 component->of_node = args.np;
3155 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3161 snd_soc_of_put_dai_link_codecs(dai_link);
3162 dai_link->codecs = NULL;
3163 dai_link->num_codecs = 0;
3166 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3168 static int __init snd_soc_init(void)
3170 snd_soc_debugfs_init();
3171 snd_soc_util_init();
3173 return platform_driver_register(&soc_driver);
3175 module_init(snd_soc_init);
3177 static void __exit snd_soc_exit(void)
3179 snd_soc_util_exit();
3180 snd_soc_debugfs_exit();
3182 platform_driver_unregister(&soc_driver);
3184 module_exit(snd_soc_exit);
3186 /* Module information */
3187 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3188 MODULE_DESCRIPTION("ALSA SoC Core");
3189 MODULE_LICENSE("GPL");
3190 MODULE_ALIAS("platform:soc-audio");