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_store(struct device *dev,
79 struct device_attribute *attr,
80 const char *buf, size_t count)
82 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
85 ret = kstrtol(buf, 10, &rtd->pmdown_time);
92 static DEVICE_ATTR_RW(pmdown_time);
94 static struct attribute *soc_dev_attrs[] = {
95 &dev_attr_pmdown_time.attr,
99 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
100 struct attribute *attr, int idx)
102 struct device *dev = kobj_to_dev(kobj);
103 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
108 if (attr == &dev_attr_pmdown_time.attr)
109 return attr->mode; /* always visible */
110 return rtd->num_codecs ? attr->mode : 0; /* enabled only with codec */
113 static const struct attribute_group soc_dapm_dev_group = {
114 .attrs = soc_dapm_dev_attrs,
115 .is_visible = soc_dev_attr_is_visible,
118 static const struct attribute_group soc_dev_group = {
119 .attrs = soc_dev_attrs,
120 .is_visible = soc_dev_attr_is_visible,
123 static const struct attribute_group *soc_dev_attr_groups[] = {
129 #ifdef CONFIG_DEBUG_FS
130 struct dentry *snd_soc_debugfs_root;
131 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
133 static void soc_init_component_debugfs(struct snd_soc_component *component)
135 if (!component->card->debugfs_card_root)
138 if (component->debugfs_prefix) {
141 name = kasprintf(GFP_KERNEL, "%s:%s",
142 component->debugfs_prefix, component->name);
144 component->debugfs_root = debugfs_create_dir(name,
145 component->card->debugfs_card_root);
149 component->debugfs_root = debugfs_create_dir(component->name,
150 component->card->debugfs_card_root);
153 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
154 component->debugfs_root);
157 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
159 if (!component->debugfs_root)
161 debugfs_remove_recursive(component->debugfs_root);
162 component->debugfs_root = NULL;
165 static int dai_list_show(struct seq_file *m, void *v)
167 struct snd_soc_component *component;
168 struct snd_soc_dai *dai;
170 mutex_lock(&client_mutex);
172 for_each_component(component)
173 for_each_component_dais(component, dai)
174 seq_printf(m, "%s\n", dai->name);
176 mutex_unlock(&client_mutex);
180 DEFINE_SHOW_ATTRIBUTE(dai_list);
182 static int component_list_show(struct seq_file *m, void *v)
184 struct snd_soc_component *component;
186 mutex_lock(&client_mutex);
188 for_each_component(component)
189 seq_printf(m, "%s\n", component->name);
191 mutex_unlock(&client_mutex);
195 DEFINE_SHOW_ATTRIBUTE(component_list);
197 static void soc_init_card_debugfs(struct snd_soc_card *card)
199 card->debugfs_card_root = debugfs_create_dir(card->name,
200 snd_soc_debugfs_root);
202 debugfs_create_u32("dapm_pop_time", 0644, card->debugfs_card_root,
205 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
208 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
210 debugfs_remove_recursive(card->debugfs_card_root);
211 card->debugfs_card_root = NULL;
214 static void snd_soc_debugfs_init(void)
216 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
218 debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
221 debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
222 &component_list_fops);
225 static void snd_soc_debugfs_exit(void)
227 debugfs_remove_recursive(snd_soc_debugfs_root);
232 static inline void soc_init_component_debugfs(struct snd_soc_component *component) { }
233 static inline void soc_cleanup_component_debugfs(struct snd_soc_component *component) { }
234 static inline void soc_init_card_debugfs(struct snd_soc_card *card) { }
235 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card) { }
236 static inline void snd_soc_debugfs_init(void) { }
237 static inline void snd_soc_debugfs_exit(void) { }
241 static int snd_soc_rtd_add_component(struct snd_soc_pcm_runtime *rtd,
242 struct snd_soc_component *component)
244 struct snd_soc_component *comp;
247 for_each_rtd_components(rtd, i, comp) {
248 /* already connected */
249 if (comp == component)
253 /* see for_each_rtd_components */
254 rtd->components[rtd->num_components] = component;
255 rtd->num_components++;
260 struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
261 const char *driver_name)
263 struct snd_soc_component *component;
272 * snd_soc_rtdcom_lookup() will find component from rtd by using
273 * specified driver name.
274 * But, if many components which have same driver name are connected
275 * to 1 rtd, this function will return 1st found component.
277 for_each_rtd_components(rtd, i, component) {
278 const char *component_name = component->driver->name;
283 if ((component_name == driver_name) ||
284 strcmp(component_name, driver_name) == 0)
290 EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
292 struct snd_soc_component
293 *snd_soc_lookup_component_nolocked(struct device *dev, const char *driver_name)
295 struct snd_soc_component *component;
296 struct snd_soc_component *found_component;
298 found_component = NULL;
299 for_each_component(component) {
300 if ((dev == component->dev) &&
302 (driver_name == component->driver->name) ||
303 (strcmp(component->driver->name, driver_name) == 0))) {
304 found_component = component;
309 return found_component;
311 EXPORT_SYMBOL_GPL(snd_soc_lookup_component_nolocked);
313 struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
314 const char *driver_name)
316 struct snd_soc_component *component;
318 mutex_lock(&client_mutex);
319 component = snd_soc_lookup_component_nolocked(dev, driver_name);
320 mutex_unlock(&client_mutex);
324 EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
326 struct snd_soc_pcm_runtime
327 *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
328 struct snd_soc_dai_link *dai_link)
330 struct snd_soc_pcm_runtime *rtd;
332 for_each_card_rtds(card, rtd) {
333 if (rtd->dai_link == dai_link)
336 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link->name);
339 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
342 * Power down the audio subsystem pmdown_time msecs after close is called.
343 * This is to ensure there are no pops or clicks in between any music tracks
344 * due to DAPM power cycling.
346 void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
348 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
349 int playback = SNDRV_PCM_STREAM_PLAYBACK;
351 mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
354 "ASoC: pop wq checking: %s status: %s waiting: %s\n",
355 codec_dai->driver->playback.stream_name,
356 snd_soc_dai_stream_active(codec_dai, playback) ?
357 "active" : "inactive",
358 rtd->pop_wait ? "yes" : "no");
360 /* are we waiting on this codec DAI stream */
361 if (rtd->pop_wait == 1) {
363 snd_soc_dapm_stream_event(rtd, playback,
364 SND_SOC_DAPM_STREAM_STOP);
367 mutex_unlock(&rtd->card->pcm_mutex);
369 EXPORT_SYMBOL_GPL(snd_soc_close_delayed_work);
371 static void soc_release_rtd_dev(struct device *dev)
373 /* "dev" means "rtd->dev" */
377 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
382 list_del(&rtd->list);
384 if (delayed_work_pending(&rtd->delayed_work))
385 flush_delayed_work(&rtd->delayed_work);
386 snd_soc_pcm_component_free(rtd);
389 * we don't need to call kfree() for rtd->dev
391 * soc_release_rtd_dev()
393 * We don't need rtd->dev NULL check, because
394 * it is alloced *before* rtd.
396 * soc_new_pcm_runtime()
398 * We don't need to mind freeing for rtd,
399 * because it was created from dev (= rtd->dev)
401 * soc_new_pcm_runtime()
403 * rtd = devm_kzalloc(dev, ...);
406 device_unregister(rtd->dev);
409 static void close_delayed_work(struct work_struct *work) {
410 struct snd_soc_pcm_runtime *rtd =
411 container_of(work, struct snd_soc_pcm_runtime,
414 if (rtd->close_delayed_work_func)
415 rtd->close_delayed_work_func(rtd);
418 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
419 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
421 struct snd_soc_pcm_runtime *rtd;
422 struct snd_soc_component *component;
430 dev = kzalloc(sizeof(struct device), GFP_KERNEL);
434 dev->parent = card->dev;
435 dev->release = soc_release_rtd_dev;
437 dev_set_name(dev, "%s", dai_link->name);
439 ret = device_register(dev);
441 put_device(dev); /* soc_release_rtd_dev */
448 rtd = devm_kzalloc(dev,
450 sizeof(*component) * (dai_link->num_cpus +
451 dai_link->num_codecs +
452 dai_link->num_platforms),
455 device_unregister(dev);
460 INIT_LIST_HEAD(&rtd->list);
461 for_each_pcm_streams(stream) {
462 INIT_LIST_HEAD(&rtd->dpcm[stream].be_clients);
463 INIT_LIST_HEAD(&rtd->dpcm[stream].fe_clients);
465 dev_set_drvdata(dev, rtd);
466 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
471 rtd->dais = devm_kcalloc(dev, dai_link->num_cpus + dai_link->num_codecs,
472 sizeof(struct snd_soc_dai *),
478 * dais = [][][][][][][][][][][][][][][][][][]
479 * ^cpu_dais ^codec_dais
480 * |--- num_cpus ---|--- num_codecs --|
483 * asoc_rtd_to_codec()
485 rtd->num_cpus = dai_link->num_cpus;
486 rtd->num_codecs = dai_link->num_codecs;
488 rtd->dai_link = dai_link;
489 rtd->num = card->num_rtd++;
491 /* see for_each_card_rtds */
492 list_add_tail(&rtd->list, &card->rtd_list);
494 ret = device_add_groups(dev, soc_dev_attr_groups);
501 soc_free_pcm_runtime(rtd);
505 static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
507 struct snd_soc_pcm_runtime *rtd;
509 for_each_card_rtds(card, rtd)
510 flush_delayed_work(&rtd->delayed_work);
513 #ifdef CONFIG_PM_SLEEP
514 static void soc_playback_digital_mute(struct snd_soc_card *card, int mute)
516 struct snd_soc_pcm_runtime *rtd;
517 struct snd_soc_dai *dai;
518 int playback = SNDRV_PCM_STREAM_PLAYBACK;
521 for_each_card_rtds(card, rtd) {
523 if (rtd->dai_link->ignore_suspend)
526 for_each_rtd_dais(rtd, i, dai) {
527 if (snd_soc_dai_stream_active(dai, playback))
528 snd_soc_dai_digital_mute(dai, mute, playback);
533 static void soc_dapm_suspend_resume(struct snd_soc_card *card, int event)
535 struct snd_soc_pcm_runtime *rtd;
538 for_each_card_rtds(card, rtd) {
540 if (rtd->dai_link->ignore_suspend)
543 for_each_pcm_streams(stream)
544 snd_soc_dapm_stream_event(rtd, stream, event);
548 /* powers down audio subsystem for suspend */
549 int snd_soc_suspend(struct device *dev)
551 struct snd_soc_card *card = dev_get_drvdata(dev);
552 struct snd_soc_component *component;
553 struct snd_soc_pcm_runtime *rtd;
556 /* If the card is not initialized yet there is nothing to do */
557 if (!card->instantiated)
561 * Due to the resume being scheduled into a workqueue we could
562 * suspend before that's finished - wait for it to complete.
564 snd_power_wait(card->snd_card);
566 /* we're going to block userspace touching us until resume completes */
567 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
569 /* mute any active DACs */
570 soc_playback_digital_mute(card, 1);
572 /* suspend all pcms */
573 for_each_card_rtds(card, rtd) {
574 if (rtd->dai_link->ignore_suspend)
577 snd_pcm_suspend_all(rtd->pcm);
580 snd_soc_card_suspend_pre(card);
582 /* close any waiting streams */
583 snd_soc_flush_all_delayed_work(card);
585 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_SUSPEND);
587 /* Recheck all endpoints too, their state is affected by suspend */
588 dapm_mark_endpoints_dirty(card);
589 snd_soc_dapm_sync(&card->dapm);
591 /* suspend all COMPONENTs */
592 for_each_card_rtds(card, rtd) {
594 if (rtd->dai_link->ignore_suspend)
597 for_each_rtd_components(rtd, i, component) {
598 struct snd_soc_dapm_context *dapm =
599 snd_soc_component_get_dapm(component);
602 * ignore if component was already suspended
604 if (snd_soc_component_is_suspended(component))
608 * If there are paths active then the COMPONENT will be
609 * held with bias _ON and should not be suspended.
611 switch (snd_soc_dapm_get_bias_level(dapm)) {
612 case SND_SOC_BIAS_STANDBY:
614 * If the COMPONENT is capable of idle
615 * bias off then being in STANDBY
616 * means it's doing something,
617 * otherwise fall through.
619 if (dapm->idle_bias_off) {
620 dev_dbg(component->dev,
621 "ASoC: idle_bias_off CODEC on over suspend\n");
626 case SND_SOC_BIAS_OFF:
627 snd_soc_component_suspend(component);
628 if (component->regmap)
629 regcache_mark_dirty(component->regmap);
630 /* deactivate pins to sleep state */
631 pinctrl_pm_select_sleep_state(component->dev);
634 dev_dbg(component->dev,
635 "ASoC: COMPONENT is on over suspend\n");
641 snd_soc_card_suspend_post(card);
645 EXPORT_SYMBOL_GPL(snd_soc_suspend);
648 * deferred resume work, so resume can complete before we finished
649 * setting our codec back up, which can be very slow on I2C
651 static void soc_resume_deferred(struct work_struct *work)
653 struct snd_soc_card *card =
654 container_of(work, struct snd_soc_card,
655 deferred_resume_work);
656 struct snd_soc_component *component;
659 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
660 * so userspace apps are blocked from touching us
663 dev_dbg(card->dev, "ASoC: starting resume work\n");
665 /* Bring us up into D2 so that DAPM starts enabling things */
666 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
668 snd_soc_card_resume_pre(card);
670 for_each_card_components(card, component) {
671 if (snd_soc_component_is_suspended(component))
672 snd_soc_component_resume(component);
675 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_RESUME);
677 /* unmute any active DACs */
678 soc_playback_digital_mute(card, 0);
680 snd_soc_card_resume_post(card);
682 dev_dbg(card->dev, "ASoC: resume work completed\n");
684 /* Recheck all endpoints too, their state is affected by suspend */
685 dapm_mark_endpoints_dirty(card);
686 snd_soc_dapm_sync(&card->dapm);
688 /* userspace can access us now we are back as we were before */
689 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
692 /* powers up audio subsystem after a suspend */
693 int snd_soc_resume(struct device *dev)
695 struct snd_soc_card *card = dev_get_drvdata(dev);
696 struct snd_soc_component *component;
698 /* If the card is not initialized yet there is nothing to do */
699 if (!card->instantiated)
702 /* activate pins from sleep state */
703 for_each_card_components(card, component)
704 if (snd_soc_component_active(component))
705 pinctrl_pm_select_default_state(component->dev);
707 dev_dbg(dev, "ASoC: Scheduling resume work\n");
708 if (!schedule_work(&card->deferred_resume_work))
709 dev_err(dev, "ASoC: resume work item may be lost\n");
713 EXPORT_SYMBOL_GPL(snd_soc_resume);
715 static void soc_resume_init(struct snd_soc_card *card)
717 /* deferred resume work */
718 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
721 #define snd_soc_suspend NULL
722 #define snd_soc_resume NULL
723 static inline void soc_resume_init(struct snd_soc_card *card) { }
726 static struct device_node
727 *soc_component_to_node(struct snd_soc_component *component)
729 struct device_node *of_node;
731 of_node = component->dev->of_node;
732 if (!of_node && component->dev->parent)
733 of_node = component->dev->parent->of_node;
738 static int snd_soc_is_matching_component(
739 const struct snd_soc_dai_link_component *dlc,
740 struct snd_soc_component *component)
742 struct device_node *component_of_node;
747 component_of_node = soc_component_to_node(component);
749 if (dlc->of_node && component_of_node != dlc->of_node)
751 if (dlc->name && strcmp(component->name, dlc->name))
757 static struct snd_soc_component *soc_find_component(
758 const struct snd_soc_dai_link_component *dlc)
760 struct snd_soc_component *component;
762 lockdep_assert_held(&client_mutex);
767 * It returns *1st* found component, but some driver
768 * has few components by same of_node/name
770 * CPU component and generic DMAEngine component
772 for_each_component(component)
773 if (snd_soc_is_matching_component(dlc, component))
780 * snd_soc_find_dai - Find a registered DAI
782 * @dlc: name of the DAI or the DAI driver and optional component info to match
784 * This function will search all registered components and their DAIs to
785 * find the DAI of the same name. The component's of_node and name
786 * should also match if being specified.
788 * Return: pointer of DAI, or NULL if not found.
790 struct snd_soc_dai *snd_soc_find_dai(
791 const struct snd_soc_dai_link_component *dlc)
793 struct snd_soc_component *component;
794 struct snd_soc_dai *dai;
796 lockdep_assert_held(&client_mutex);
798 /* Find CPU DAI from registered DAIs */
799 for_each_component(component) {
800 if (!snd_soc_is_matching_component(dlc, component))
802 for_each_component_dais(component, dai) {
803 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
804 && (!dai->driver->name
805 || strcmp(dai->driver->name, dlc->dai_name)))
814 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
816 struct snd_soc_dai *snd_soc_find_dai_with_mutex(
817 const struct snd_soc_dai_link_component *dlc)
819 struct snd_soc_dai *dai;
821 mutex_lock(&client_mutex);
822 dai = snd_soc_find_dai(dlc);
823 mutex_unlock(&client_mutex);
827 EXPORT_SYMBOL_GPL(snd_soc_find_dai_with_mutex);
829 static int soc_dai_link_sanity_check(struct snd_soc_card *card,
830 struct snd_soc_dai_link *link)
833 struct snd_soc_dai_link_component *cpu, *codec, *platform;
835 for_each_link_codecs(link, i, codec) {
837 * Codec must be specified by 1 of name or OF node,
838 * not both or neither.
840 if (!!codec->name == !!codec->of_node) {
841 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
846 /* Codec DAI name must be specified */
847 if (!codec->dai_name) {
848 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
854 * Defer card registration if codec component is not added to
857 if (!soc_find_component(codec)) {
859 "ASoC: codec component %s not found for link %s\n",
860 codec->name, link->name);
861 return -EPROBE_DEFER;
865 for_each_link_platforms(link, i, platform) {
867 * Platform may be specified by either name or OF node, but it
868 * can be left unspecified, then no components will be inserted
871 if (!!platform->name == !!platform->of_node) {
873 "ASoC: Neither/both platform name/of_node are set for %s\n",
879 * Defer card registration if platform component is not added to
882 if (!soc_find_component(platform)) {
884 "ASoC: platform component %s not found for link %s\n",
885 platform->name, link->name);
886 return -EPROBE_DEFER;
890 for_each_link_cpus(link, i, cpu) {
892 * CPU device may be specified by either name or OF node, but
893 * can be left unspecified, and will be matched based on DAI
896 if (cpu->name && cpu->of_node) {
898 "ASoC: Neither/both cpu name/of_node are set for %s\n",
904 * Defer card registration if cpu dai component is not added to
907 if ((cpu->of_node || cpu->name) &&
908 !soc_find_component(cpu)) {
910 "ASoC: cpu component %s not found for link %s\n",
911 cpu->name, link->name);
912 return -EPROBE_DEFER;
916 * At least one of CPU DAI name or CPU device name/node must be
919 if (!cpu->dai_name &&
920 !(cpu->name || cpu->of_node)) {
922 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
932 * snd_soc_remove_pcm_runtime - Remove a pcm_runtime from card
933 * @card: The ASoC card to which the pcm_runtime has
934 * @rtd: The pcm_runtime to remove
936 * This function removes a pcm_runtime from the ASoC card.
938 void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
939 struct snd_soc_pcm_runtime *rtd)
941 lockdep_assert_held(&client_mutex);
943 /* release machine specific resources */
944 snd_soc_link_exit(rtd);
947 * Notify the machine driver for extra destruction
949 snd_soc_card_remove_dai_link(card, rtd->dai_link);
951 soc_free_pcm_runtime(rtd);
953 EXPORT_SYMBOL_GPL(snd_soc_remove_pcm_runtime);
956 * snd_soc_add_pcm_runtime - Add a pcm_runtime dynamically via dai_link
957 * @card: The ASoC card to which the pcm_runtime is added
958 * @dai_link: The DAI link to find pcm_runtime
960 * This function adds a pcm_runtime ASoC card by using dai_link.
962 * Note: Topology can use this API to add pcm_runtime when probing the
963 * topology component. And machine drivers can still define static
964 * DAI links in dai_link array.
966 int snd_soc_add_pcm_runtime(struct snd_soc_card *card,
967 struct snd_soc_dai_link *dai_link)
969 struct snd_soc_pcm_runtime *rtd;
970 struct snd_soc_dai_link_component *codec, *platform, *cpu;
971 struct snd_soc_component *component;
974 lockdep_assert_held(&client_mutex);
977 * Notify the machine driver for extra initialization
979 ret = snd_soc_card_add_dai_link(card, dai_link);
983 if (dai_link->ignore)
986 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
988 ret = soc_dai_link_sanity_check(card, dai_link);
992 rtd = soc_new_pcm_runtime(card, dai_link);
996 for_each_link_cpus(dai_link, i, cpu) {
997 asoc_rtd_to_cpu(rtd, i) = snd_soc_find_dai(cpu);
998 if (!asoc_rtd_to_cpu(rtd, i)) {
999 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1003 snd_soc_rtd_add_component(rtd, asoc_rtd_to_cpu(rtd, i)->component);
1006 /* Find CODEC from registered CODECs */
1007 for_each_link_codecs(dai_link, i, codec) {
1008 asoc_rtd_to_codec(rtd, i) = snd_soc_find_dai(codec);
1009 if (!asoc_rtd_to_codec(rtd, i)) {
1010 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
1015 snd_soc_rtd_add_component(rtd, asoc_rtd_to_codec(rtd, i)->component);
1018 /* Find PLATFORM from registered PLATFORMs */
1019 for_each_link_platforms(dai_link, i, platform) {
1020 for_each_component(component) {
1021 if (!snd_soc_is_matching_component(platform, component))
1024 snd_soc_rtd_add_component(rtd, component);
1031 snd_soc_remove_pcm_runtime(card, rtd);
1032 return -EPROBE_DEFER;
1034 EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtime);
1036 static void snd_soc_runtime_get_dai_fmt(struct snd_soc_pcm_runtime *rtd)
1038 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1039 struct snd_soc_dai *dai, *not_used;
1040 struct device *dev = rtd->dev;
1041 u64 pos, possible_fmt;
1042 unsigned int mask = 0, dai_fmt = 0;
1043 int i, j, priority, pri, until;
1046 * Get selectable format from each DAIs.
1048 ****************************
1050 * Using .auto_selectable_formats is not mandatory,
1051 * we can select format manually from Sound Card.
1052 * When use it, driver should list well tested format only.
1053 ****************************
1056 * auto_selectable_formats (= SND_SOC_POSSIBLE_xxx)
1058 * DAI0_: { 0x000F, 0x00F0, 0x0F00 };
1059 * DAI1 : { 0xF000, 0x0F00 };
1062 * "until" will be 3 in this case (MAX array size from DAI0 and DAI1)
1063 * Here is dev_dbg() message and comments
1066 * DAI0: (pri, fmt) = (1, 000000000000000F) // 1st check (A) DAI1 is not selected
1067 * DAI1: (pri, fmt) = (0, 0000000000000000) // Necessary Waste
1068 * DAI0: (pri, fmt) = (1, 000000000000000F) // 2nd check (A)
1069 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1071 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 3rd check (A) + (B)
1072 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1073 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 4th check (A) + (B)
1074 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1076 * DAI0: (pri, fmt) = (3, 0000000000000FFF) // 5th check (A) + (B) + (C)
1077 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1078 * found auto selected format: 0000000000000F00
1080 until = snd_soc_dai_get_fmt_max_priority(rtd);
1081 for (priority = 1; priority <= until; priority++) {
1083 dev_dbg(dev, "priority = %d\n", priority);
1084 for_each_rtd_dais(rtd, j, not_used) {
1086 possible_fmt = ULLONG_MAX;
1087 for_each_rtd_dais(rtd, i, dai) {
1090 pri = (j >= i) ? priority : priority - 1;
1091 fmt = snd_soc_dai_get_fmt(dai, pri);
1092 dev_dbg(dev, "%s: (pri, fmt) = (%d, %016llX)\n", dai->name, pri, fmt);
1093 possible_fmt &= fmt;
1102 dev_dbg(dev, "found auto selected format: %016llX\n", possible_fmt);
1105 * convert POSSIBLE_DAIFMT to DAIFMT
1107 * Some basic/default settings on each is defined as 0.
1109 * SND_SOC_DAIFMT_NB_NF
1110 * SND_SOC_DAIFMT_GATED
1112 * SND_SOC_DAIFMT_xxx_MASK can't notice it if Sound Card specify
1113 * these value, and will be overwrite to auto selected value.
1115 * To avoid such issue, loop from 63 to 0 here.
1116 * Small number of SND_SOC_POSSIBLE_xxx will be Hi priority.
1117 * Basic/Default settings of each part and aboves are defined
1118 * as Hi priority (= small number) of SND_SOC_POSSIBLE_xxx.
1120 for (i = 63; i >= 0; i--) {
1122 switch (possible_fmt & pos) {
1126 case SND_SOC_POSSIBLE_DAIFMT_I2S:
1127 case SND_SOC_POSSIBLE_DAIFMT_RIGHT_J:
1128 case SND_SOC_POSSIBLE_DAIFMT_LEFT_J:
1129 case SND_SOC_POSSIBLE_DAIFMT_DSP_A:
1130 case SND_SOC_POSSIBLE_DAIFMT_DSP_B:
1131 case SND_SOC_POSSIBLE_DAIFMT_AC97:
1132 case SND_SOC_POSSIBLE_DAIFMT_PDM:
1133 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_FORMAT_MASK) | i;
1138 case SND_SOC_POSSIBLE_DAIFMT_CONT:
1139 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_CONT;
1141 case SND_SOC_POSSIBLE_DAIFMT_GATED:
1142 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_GATED;
1147 case SND_SOC_POSSIBLE_DAIFMT_NB_NF:
1148 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_NF;
1150 case SND_SOC_POSSIBLE_DAIFMT_NB_IF:
1151 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_IF;
1153 case SND_SOC_POSSIBLE_DAIFMT_IB_NF:
1154 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_NF;
1156 case SND_SOC_POSSIBLE_DAIFMT_IB_IF:
1157 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_IF;
1160 * for clock provider / consumer
1162 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFP:
1163 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFP;
1165 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFP:
1166 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFP;
1168 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFC:
1169 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFC;
1171 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFC:
1172 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFC;
1178 * Some driver might have very complex limitation.
1179 * In such case, user want to auto-select non-limitation part,
1180 * and want to manually specify complex part.
1182 * Or for example, if both CPU and Codec can be clock provider,
1183 * but because of its quality, user want to specify it manually.
1185 * Use manually specified settings if sound card did.
1187 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK))
1188 mask |= SND_SOC_DAIFMT_FORMAT_MASK;
1189 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_MASK))
1190 mask |= SND_SOC_DAIFMT_CLOCK_MASK;
1191 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_INV_MASK))
1192 mask |= SND_SOC_DAIFMT_INV_MASK;
1193 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK))
1194 mask |= SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
1196 dai_link->dai_fmt |= (dai_fmt & mask);
1200 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1201 * @rtd: The runtime for which the DAI link format should be changed
1202 * @dai_fmt: The new DAI link format
1204 * This function updates the DAI link format for all DAIs connected to the DAI
1205 * link for the specified runtime.
1207 * Note: For setups with a static format set the dai_fmt field in the
1208 * corresponding snd_dai_link struct instead of using this function.
1210 * Returns 0 on success, otherwise a negative error code.
1212 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1213 unsigned int dai_fmt)
1215 struct snd_soc_dai *cpu_dai;
1216 struct snd_soc_dai *codec_dai;
1217 unsigned int inv_dai_fmt;
1224 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1225 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1226 if (ret != 0 && ret != -ENOTSUPP)
1231 * Flip the polarity for the "CPU" end of a CODEC<->CODEC link
1233 inv_dai_fmt = snd_soc_daifmt_clock_provider_flipped(dai_fmt);
1235 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1236 unsigned int fmt = dai_fmt;
1238 if (snd_soc_component_is_codec(cpu_dai->component))
1241 ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
1242 if (ret != 0 && ret != -ENOTSUPP)
1248 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1250 static int soc_init_pcm_runtime(struct snd_soc_card *card,
1251 struct snd_soc_pcm_runtime *rtd)
1253 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1254 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
1255 struct snd_soc_component *component;
1258 /* set default power off timeout */
1259 rtd->pmdown_time = pmdown_time;
1261 /* do machine specific initialization */
1262 ret = snd_soc_link_init(rtd);
1266 snd_soc_runtime_get_dai_fmt(rtd);
1267 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1271 /* add DPCM sysfs entries */
1272 soc_dpcm_debugfs_add(rtd);
1277 * most drivers will register their PCMs using DAI link ordering but
1278 * topology based drivers can use the DAI link id field to set PCM
1279 * device number and then use rtd + a base offset of the BEs.
1281 for_each_rtd_components(rtd, i, component) {
1282 if (!component->driver->use_dai_pcm_id)
1285 if (rtd->dai_link->no_pcm)
1286 num += component->driver->be_pcm_base;
1288 num = rtd->dai_link->id;
1291 /* create compress_device if possible */
1292 ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1293 if (ret != -ENOTSUPP)
1296 /* create the pcm */
1297 ret = soc_new_pcm(rtd, num);
1299 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1300 dai_link->stream_name, ret);
1304 return snd_soc_pcm_dai_new(rtd);
1307 static void soc_set_name_prefix(struct snd_soc_card *card,
1308 struct snd_soc_component *component)
1310 struct device_node *of_node = soc_component_to_node(component);
1314 for (i = 0; i < card->num_configs; i++) {
1315 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1317 if (snd_soc_is_matching_component(&map->dlc, component) &&
1319 component->name_prefix = map->name_prefix;
1325 * If there is no configuration table or no match in the table,
1326 * check if a prefix is provided in the node
1328 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1332 component->name_prefix = str;
1335 static void soc_remove_component(struct snd_soc_component *component,
1339 if (!component->card)
1343 snd_soc_component_remove(component);
1345 list_del_init(&component->card_list);
1346 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1347 soc_cleanup_component_debugfs(component);
1348 component->card = NULL;
1349 snd_soc_component_module_put_when_remove(component);
1352 static int soc_probe_component(struct snd_soc_card *card,
1353 struct snd_soc_component *component)
1355 struct snd_soc_dapm_context *dapm =
1356 snd_soc_component_get_dapm(component);
1357 struct snd_soc_dai *dai;
1361 if (snd_soc_component_is_dummy(component))
1364 if (component->card) {
1365 if (component->card != card) {
1366 dev_err(component->dev,
1367 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1368 card->name, component->card->name);
1374 ret = snd_soc_component_module_get_when_probe(component);
1378 component->card = card;
1379 soc_set_name_prefix(card, component);
1381 soc_init_component_debugfs(component);
1383 snd_soc_dapm_init(dapm, card, component);
1385 ret = snd_soc_dapm_new_controls(dapm,
1386 component->driver->dapm_widgets,
1387 component->driver->num_dapm_widgets);
1390 dev_err(component->dev,
1391 "Failed to create new controls %d\n", ret);
1395 for_each_component_dais(component, dai) {
1396 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1398 dev_err(component->dev,
1399 "Failed to create DAI widgets %d\n", ret);
1404 ret = snd_soc_component_probe(component);
1408 WARN(dapm->idle_bias_off &&
1409 dapm->bias_level != SND_SOC_BIAS_OFF,
1410 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1415 * machine specific init
1417 * snd_soc_component_set_aux()
1419 ret = snd_soc_component_init(component);
1423 ret = snd_soc_add_component_controls(component,
1424 component->driver->controls,
1425 component->driver->num_controls);
1429 ret = snd_soc_dapm_add_routes(dapm,
1430 component->driver->dapm_routes,
1431 component->driver->num_dapm_routes);
1433 if (card->disable_route_checks) {
1435 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1439 "%s: snd_soc_dapm_add_routes failed: %d\n",
1445 /* see for_each_card_components */
1446 list_add(&component->card_list, &card->component_dev_list);
1450 soc_remove_component(component, probed);
1455 static void soc_remove_link_dais(struct snd_soc_card *card)
1457 struct snd_soc_pcm_runtime *rtd;
1460 for_each_comp_order(order) {
1461 for_each_card_rtds(card, rtd) {
1462 /* remove all rtd connected DAIs in good order */
1463 snd_soc_pcm_dai_remove(rtd, order);
1468 static int soc_probe_link_dais(struct snd_soc_card *card)
1470 struct snd_soc_pcm_runtime *rtd;
1473 for_each_comp_order(order) {
1474 for_each_card_rtds(card, rtd) {
1477 "ASoC: probe %s dai link %d late %d\n",
1478 card->name, rtd->num, order);
1480 /* probe all rtd connected DAIs in good order */
1481 ret = snd_soc_pcm_dai_probe(rtd, order);
1490 static void soc_remove_link_components(struct snd_soc_card *card)
1492 struct snd_soc_component *component;
1493 struct snd_soc_pcm_runtime *rtd;
1496 for_each_comp_order(order) {
1497 for_each_card_rtds(card, rtd) {
1498 for_each_rtd_components(rtd, i, component) {
1499 if (component->driver->remove_order != order)
1502 soc_remove_component(component, 1);
1508 static int soc_probe_link_components(struct snd_soc_card *card)
1510 struct snd_soc_component *component;
1511 struct snd_soc_pcm_runtime *rtd;
1514 for_each_comp_order(order) {
1515 for_each_card_rtds(card, rtd) {
1516 for_each_rtd_components(rtd, i, component) {
1517 if (component->driver->probe_order != order)
1520 ret = soc_probe_component(card, component);
1530 static void soc_unbind_aux_dev(struct snd_soc_card *card)
1532 struct snd_soc_component *component, *_component;
1534 for_each_card_auxs_safe(card, component, _component) {
1535 /* for snd_soc_component_init() */
1536 snd_soc_component_set_aux(component, NULL);
1537 list_del(&component->card_aux_list);
1541 static int soc_bind_aux_dev(struct snd_soc_card *card)
1543 struct snd_soc_component *component;
1544 struct snd_soc_aux_dev *aux;
1547 for_each_card_pre_auxs(card, i, aux) {
1548 /* codecs, usually analog devices */
1549 component = soc_find_component(&aux->dlc);
1551 return -EPROBE_DEFER;
1553 /* for snd_soc_component_init() */
1554 snd_soc_component_set_aux(component, aux);
1555 /* see for_each_card_auxs */
1556 list_add(&component->card_aux_list, &card->aux_comp_list);
1561 static int soc_probe_aux_devices(struct snd_soc_card *card)
1563 struct snd_soc_component *component;
1567 for_each_comp_order(order) {
1568 for_each_card_auxs(card, component) {
1569 if (component->driver->probe_order != order)
1572 ret = soc_probe_component(card, component);
1581 static void soc_remove_aux_devices(struct snd_soc_card *card)
1583 struct snd_soc_component *comp, *_comp;
1586 for_each_comp_order(order) {
1587 for_each_card_auxs_safe(card, comp, _comp) {
1588 if (comp->driver->remove_order == order)
1589 soc_remove_component(comp, 1);
1596 * If a DMI filed contain strings in this blacklist (e.g.
1597 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
1598 * as invalid and dropped when setting the card long name from DMI info.
1600 static const char * const dmi_blacklist[] = {
1601 "To be filled by OEM",
1604 "Board Manufacturer",
1605 "Board Vendor Name",
1606 "Board Product Name",
1607 NULL, /* terminator */
1611 * Trim special characters, and replace '-' with '_' since '-' is used to
1612 * separate different DMI fields in the card long name. Only number and
1613 * alphabet characters and a few separator characters are kept.
1615 static void cleanup_dmi_name(char *name)
1619 for (i = 0; name[i]; i++) {
1620 if (isalnum(name[i]) || (name[i] == '.')
1621 || (name[i] == '_'))
1622 name[j++] = name[i];
1623 else if (name[i] == '-')
1631 * Check if a DMI field is valid, i.e. not containing any string
1632 * in the black list.
1634 static int is_dmi_valid(const char *field)
1638 while (dmi_blacklist[i]) {
1639 if (strstr(field, dmi_blacklist[i]))
1648 * Append a string to card->dmi_longname with character cleanups.
1650 static void append_dmi_string(struct snd_soc_card *card, const char *str)
1652 char *dst = card->dmi_longname;
1653 size_t dst_len = sizeof(card->dmi_longname);
1657 snprintf(dst + len, dst_len - len, "-%s", str);
1659 len++; /* skip the separator "-" */
1661 cleanup_dmi_name(dst + len);
1665 * snd_soc_set_dmi_name() - Register DMI names to card
1666 * @card: The card to register DMI names
1667 * @flavour: The flavour "differentiator" for the card amongst its peers.
1669 * An Intel machine driver may be used by many different devices but are
1670 * difficult for userspace to differentiate, since machine drivers ususally
1671 * use their own name as the card short name and leave the card long name
1672 * blank. To differentiate such devices and fix bugs due to lack of
1673 * device-specific configurations, this function allows DMI info to be used
1674 * as the sound card long name, in the format of
1675 * "vendor-product-version-board"
1676 * (Character '-' is used to separate different DMI fields here).
1677 * This will help the user space to load the device-specific Use Case Manager
1678 * (UCM) configurations for the card.
1680 * Possible card long names may be:
1681 * DellInc.-XPS139343-01-0310JH
1682 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1683 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1685 * This function also supports flavoring the card longname to provide
1686 * the extra differentiation, like "vendor-product-version-board-flavor".
1688 * We only keep number and alphabet characters and a few separator characters
1689 * in the card long name since UCM in the user space uses the card long names
1690 * as card configuration directory names and AudoConf cannot support special
1691 * charactors like SPACE.
1693 * Returns 0 on success, otherwise a negative error code.
1695 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1697 const char *vendor, *product, *board;
1699 if (card->long_name)
1700 return 0; /* long name already set by driver or from DMI */
1705 /* make up dmi long name as: vendor-product-version-board */
1706 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1707 if (!vendor || !is_dmi_valid(vendor)) {
1708 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1712 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1713 cleanup_dmi_name(card->dmi_longname);
1715 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1716 if (product && is_dmi_valid(product)) {
1717 const char *product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1719 append_dmi_string(card, product);
1722 * some vendors like Lenovo may only put a self-explanatory
1723 * name in the product version field
1725 if (product_version && is_dmi_valid(product_version))
1726 append_dmi_string(card, product_version);
1729 board = dmi_get_system_info(DMI_BOARD_NAME);
1730 if (board && is_dmi_valid(board)) {
1731 if (!product || strcasecmp(board, product))
1732 append_dmi_string(card, board);
1733 } else if (!product) {
1734 /* fall back to using legacy name */
1735 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1739 /* Add flavour to dmi long name */
1741 append_dmi_string(card, flavour);
1743 /* set the card long name */
1744 card->long_name = card->dmi_longname;
1748 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1749 #endif /* CONFIG_DMI */
1751 static void soc_check_tplg_fes(struct snd_soc_card *card)
1753 struct snd_soc_component *component;
1754 const struct snd_soc_component_driver *comp_drv;
1755 struct snd_soc_dai_link *dai_link;
1758 for_each_component(component) {
1760 /* does this component override BEs ? */
1761 if (!component->driver->ignore_machine)
1764 /* for this machine ? */
1765 if (!strcmp(component->driver->ignore_machine,
1766 card->dev->driver->name))
1768 if (strcmp(component->driver->ignore_machine,
1769 dev_name(card->dev)))
1772 /* machine matches, so override the rtd data */
1773 for_each_card_prelinks(card, i, dai_link) {
1775 /* ignore this FE */
1776 if (dai_link->dynamic) {
1777 dai_link->ignore = true;
1781 dev_dbg(card->dev, "info: override BE DAI link %s\n",
1782 card->dai_link[i].name);
1784 /* override platform component */
1785 if (!dai_link->platforms) {
1786 dev_err(card->dev, "init platform error");
1790 if (component->dev->of_node)
1791 dai_link->platforms->of_node = component->dev->of_node;
1793 dai_link->platforms->name = component->name;
1795 /* convert non BE into BE */
1796 if (!dai_link->no_pcm) {
1797 dai_link->no_pcm = 1;
1799 if (dai_link->dpcm_playback)
1801 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_playback=1\n",
1803 if (dai_link->dpcm_capture)
1805 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_capture=1\n",
1808 /* convert normal link into DPCM one */
1809 if (!(dai_link->dpcm_playback ||
1810 dai_link->dpcm_capture)) {
1811 dai_link->dpcm_playback = !dai_link->capture_only;
1812 dai_link->dpcm_capture = !dai_link->playback_only;
1817 * override any BE fixups
1819 * snd_soc_link_be_hw_params_fixup()
1821 dai_link->be_hw_params_fixup =
1822 component->driver->be_hw_params_fixup;
1825 * most BE links don't set stream name, so set it to
1826 * dai link name if it's NULL to help bind widgets.
1828 if (!dai_link->stream_name)
1829 dai_link->stream_name = dai_link->name;
1832 /* Inform userspace we are using alternate topology */
1833 if (component->driver->topology_name_prefix) {
1835 /* topology shortname created? */
1836 if (!card->topology_shortname_created) {
1837 comp_drv = component->driver;
1839 snprintf(card->topology_shortname, 32, "%s-%s",
1840 comp_drv->topology_name_prefix,
1842 card->topology_shortname_created = true;
1845 /* use topology shortname */
1846 card->name = card->topology_shortname;
1851 #define soc_setup_card_name(name, name1, name2, norm) \
1852 __soc_setup_card_name(name, sizeof(name), name1, name2, norm)
1853 static void __soc_setup_card_name(char *name, int len,
1854 const char *name1, const char *name2,
1859 snprintf(name, len, "%s", name1 ? name1 : name2);
1865 * Name normalization
1867 * The driver name is somewhat special, as it's used as a key for
1868 * searches in the user-space.
1871 * "abcd??efg" -> "abcd__efg"
1873 for (i = 0; i < len; i++) {
1880 if (!isalnum(name[i]))
1887 static void soc_cleanup_card_resources(struct snd_soc_card *card)
1889 struct snd_soc_pcm_runtime *rtd, *n;
1892 snd_card_disconnect_sync(card->snd_card);
1894 snd_soc_dapm_shutdown(card);
1896 /* remove and free each DAI */
1897 soc_remove_link_dais(card);
1898 soc_remove_link_components(card);
1900 for_each_card_rtds_safe(card, rtd, n)
1901 snd_soc_remove_pcm_runtime(card, rtd);
1903 /* remove auxiliary devices */
1904 soc_remove_aux_devices(card);
1905 soc_unbind_aux_dev(card);
1907 snd_soc_dapm_free(&card->dapm);
1908 soc_cleanup_card_debugfs(card);
1910 /* remove the card */
1911 snd_soc_card_remove(card);
1913 if (card->snd_card) {
1914 snd_card_free(card->snd_card);
1915 card->snd_card = NULL;
1919 static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
1921 if (card->instantiated) {
1922 card->instantiated = false;
1923 snd_soc_flush_all_delayed_work(card);
1925 soc_cleanup_card_resources(card);
1927 list_add(&card->list, &unbind_card_list);
1930 list_del(&card->list);
1934 static int snd_soc_bind_card(struct snd_soc_card *card)
1936 struct snd_soc_pcm_runtime *rtd;
1937 struct snd_soc_component *component;
1938 struct snd_soc_dai_link *dai_link;
1941 mutex_lock(&client_mutex);
1942 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1944 snd_soc_dapm_init(&card->dapm, card, NULL);
1946 /* check whether any platform is ignore machine FE and using topology */
1947 soc_check_tplg_fes(card);
1949 /* bind aux_devs too */
1950 ret = soc_bind_aux_dev(card);
1954 /* add predefined DAI links to the list */
1956 for_each_card_prelinks(card, i, dai_link) {
1957 ret = snd_soc_add_pcm_runtime(card, dai_link);
1962 /* card bind complete so register a sound card */
1963 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1964 card->owner, 0, &card->snd_card);
1967 "ASoC: can't create sound card for card %s: %d\n",
1972 soc_init_card_debugfs(card);
1974 soc_resume_init(card);
1976 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1977 card->num_dapm_widgets);
1981 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
1982 card->num_of_dapm_widgets);
1986 /* initialise the sound card only once */
1987 ret = snd_soc_card_probe(card);
1991 /* probe all components used by DAI links on this card */
1992 ret = soc_probe_link_components(card);
1995 "ASoC: failed to instantiate card %d\n", ret);
1999 /* probe auxiliary components */
2000 ret = soc_probe_aux_devices(card);
2003 "ASoC: failed to probe aux component %d\n", ret);
2007 /* probe all DAI links on this card */
2008 ret = soc_probe_link_dais(card);
2011 "ASoC: failed to instantiate card %d\n", ret);
2015 for_each_card_rtds(card, rtd) {
2016 ret = soc_init_pcm_runtime(card, rtd);
2021 snd_soc_dapm_link_dai_widgets(card);
2022 snd_soc_dapm_connect_dai_link_widgets(card);
2024 ret = snd_soc_add_card_controls(card, card->controls,
2025 card->num_controls);
2029 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2030 card->num_dapm_routes);
2032 if (card->disable_route_checks) {
2034 "%s: disable_route_checks set, ignoring errors on add_routes\n",
2038 "%s: snd_soc_dapm_add_routes failed: %d\n",
2044 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2045 card->num_of_dapm_routes);
2049 /* try to set some sane longname if DMI is available */
2050 snd_soc_set_dmi_name(card, NULL);
2052 soc_setup_card_name(card->snd_card->shortname,
2053 card->name, NULL, 0);
2054 soc_setup_card_name(card->snd_card->longname,
2055 card->long_name, card->name, 0);
2056 soc_setup_card_name(card->snd_card->driver,
2057 card->driver_name, card->name, 1);
2059 if (card->components) {
2060 /* the current implementation of snd_component_add() accepts */
2061 /* multiple components in the string separated by space, */
2062 /* but the string collision (identical string) check might */
2063 /* not work correctly */
2064 ret = snd_component_add(card->snd_card, card->components);
2066 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
2072 ret = snd_soc_card_late_probe(card);
2076 snd_soc_dapm_new_widgets(card);
2078 ret = snd_card_register(card->snd_card);
2080 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2085 card->instantiated = 1;
2086 dapm_mark_endpoints_dirty(card);
2087 snd_soc_dapm_sync(&card->dapm);
2089 /* deactivate pins to sleep state */
2090 for_each_card_components(card, component)
2091 if (!snd_soc_component_active(component))
2092 pinctrl_pm_select_sleep_state(component->dev);
2096 soc_cleanup_card_resources(card);
2098 mutex_unlock(&card->mutex);
2099 mutex_unlock(&client_mutex);
2104 /* probes a new socdev */
2105 static int soc_probe(struct platform_device *pdev)
2107 struct snd_soc_card *card = platform_get_drvdata(pdev);
2110 * no card, so machine driver should be registering card
2111 * we should not be here in that case so ret error
2116 dev_warn(&pdev->dev,
2117 "ASoC: machine %s should use snd_soc_register_card()\n",
2120 /* Bodge while we unpick instantiation */
2121 card->dev = &pdev->dev;
2123 return devm_snd_soc_register_card(&pdev->dev, card);
2126 int snd_soc_poweroff(struct device *dev)
2128 struct snd_soc_card *card = dev_get_drvdata(dev);
2129 struct snd_soc_component *component;
2131 if (!card->instantiated)
2135 * Flush out pmdown_time work - we actually do want to run it
2136 * now, we're shutting down so no imminent restart.
2138 snd_soc_flush_all_delayed_work(card);
2140 snd_soc_dapm_shutdown(card);
2142 /* deactivate pins to sleep state */
2143 for_each_card_components(card, component)
2144 pinctrl_pm_select_sleep_state(component->dev);
2148 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2150 const struct dev_pm_ops snd_soc_pm_ops = {
2151 .suspend = snd_soc_suspend,
2152 .resume = snd_soc_resume,
2153 .freeze = snd_soc_suspend,
2154 .thaw = snd_soc_resume,
2155 .poweroff = snd_soc_poweroff,
2156 .restore = snd_soc_resume,
2158 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2160 /* ASoC platform driver */
2161 static struct platform_driver soc_driver = {
2163 .name = "soc-audio",
2164 .pm = &snd_soc_pm_ops,
2170 * snd_soc_cnew - create new control
2171 * @_template: control template
2172 * @data: control private data
2173 * @long_name: control long name
2174 * @prefix: control name prefix
2176 * Create a new mixer control from a template control.
2178 * Returns 0 for success, else error.
2180 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2181 void *data, const char *long_name,
2184 struct snd_kcontrol_new template;
2185 struct snd_kcontrol *kcontrol;
2188 memcpy(&template, _template, sizeof(template));
2192 long_name = template.name;
2195 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2199 template.name = name;
2201 template.name = long_name;
2204 kcontrol = snd_ctl_new1(&template, data);
2210 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2212 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2213 const struct snd_kcontrol_new *controls, int num_controls,
2214 const char *prefix, void *data)
2218 for (i = 0; i < num_controls; i++) {
2219 const struct snd_kcontrol_new *control = &controls[i];
2220 int err = snd_ctl_add(card, snd_soc_cnew(control, data,
2221 control->name, prefix));
2223 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2224 control->name, err);
2233 * snd_soc_add_component_controls - Add an array of controls to a component.
2235 * @component: Component to add controls to
2236 * @controls: Array of controls to add
2237 * @num_controls: Number of elements in the array
2239 * Return: 0 for success, else error.
2241 int snd_soc_add_component_controls(struct snd_soc_component *component,
2242 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2244 struct snd_card *card = component->card->snd_card;
2246 return snd_soc_add_controls(card, component->dev, controls,
2247 num_controls, component->name_prefix, component);
2249 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2252 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2253 * Convenience function to add a list of controls.
2255 * @soc_card: SoC card to add controls to
2256 * @controls: array of controls to add
2257 * @num_controls: number of elements in the array
2259 * Return 0 for success, else error.
2261 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2262 const struct snd_kcontrol_new *controls, int num_controls)
2264 struct snd_card *card = soc_card->snd_card;
2266 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2269 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2272 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2273 * Convienience function to add a list of controls.
2275 * @dai: DAI to add controls to
2276 * @controls: array of controls to add
2277 * @num_controls: number of elements in the array
2279 * Return 0 for success, else error.
2281 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2282 const struct snd_kcontrol_new *controls, int num_controls)
2284 struct snd_card *card = dai->component->card->snd_card;
2286 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2289 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2292 * snd_soc_register_card - Register a card with the ASoC core
2294 * @card: Card to register
2297 int snd_soc_register_card(struct snd_soc_card *card)
2299 if (!card->name || !card->dev)
2302 dev_set_drvdata(card->dev, card);
2304 INIT_LIST_HEAD(&card->widgets);
2305 INIT_LIST_HEAD(&card->paths);
2306 INIT_LIST_HEAD(&card->dapm_list);
2307 INIT_LIST_HEAD(&card->aux_comp_list);
2308 INIT_LIST_HEAD(&card->component_dev_list);
2309 INIT_LIST_HEAD(&card->list);
2310 INIT_LIST_HEAD(&card->rtd_list);
2311 INIT_LIST_HEAD(&card->dapm_dirty);
2312 INIT_LIST_HEAD(&card->dobj_list);
2314 card->instantiated = 0;
2315 mutex_init(&card->mutex);
2316 mutex_init(&card->dapm_mutex);
2317 mutex_init(&card->pcm_mutex);
2319 return snd_soc_bind_card(card);
2321 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2324 * snd_soc_unregister_card - Unregister a card with the ASoC core
2326 * @card: Card to unregister
2329 int snd_soc_unregister_card(struct snd_soc_card *card)
2331 mutex_lock(&client_mutex);
2332 snd_soc_unbind_card(card, true);
2333 mutex_unlock(&client_mutex);
2334 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2338 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2341 * Simplify DAI link configuration by removing ".-1" from device names
2342 * and sanitizing names.
2344 static char *fmt_single_name(struct device *dev, int *id)
2346 const char *devname = dev_name(dev);
2348 unsigned int id1, id2;
2350 if (devname == NULL)
2353 name = devm_kstrdup(dev, devname, GFP_KERNEL);
2357 /* are we a "%s.%d" name (platform and SPI components) */
2358 found = strstr(name, dev->driver->name);
2361 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2363 /* discard ID from name if ID == -1 */
2365 found[strlen(dev->driver->name)] = '\0';
2368 /* I2C component devices are named "bus-addr" */
2369 } else if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2371 /* create unique ID number from I2C addr and bus */
2372 *id = ((id1 & 0xffff) << 16) + id2;
2374 devm_kfree(dev, name);
2376 /* sanitize component name for DAI link creation */
2377 name = devm_kasprintf(dev, GFP_KERNEL, "%s.%s", dev->driver->name, devname);
2386 * Simplify DAI link naming for single devices with multiple DAIs by removing
2387 * any ".-1" and using the DAI name (instead of device name).
2389 static inline char *fmt_multiple_name(struct device *dev,
2390 struct snd_soc_dai_driver *dai_drv)
2392 if (dai_drv->name == NULL) {
2394 "ASoC: error - multiple DAI %s registered with no name\n",
2399 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2402 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2404 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2405 list_del(&dai->list);
2407 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2410 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2412 * @component: The component the DAIs are registered for
2413 * @dai_drv: DAI driver to use for the DAI
2414 * @legacy_dai_naming: if %true, use legacy single-name format;
2415 * if %false, use multiple-name format;
2417 * Topology can use this API to register DAIs when probing a component.
2418 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2419 * will be freed in the component cleanup.
2421 struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2422 struct snd_soc_dai_driver *dai_drv,
2423 bool legacy_dai_naming)
2425 struct device *dev = component->dev;
2426 struct snd_soc_dai *dai;
2428 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2430 lockdep_assert_held(&client_mutex);
2432 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2437 * Back in the old days when we still had component-less DAIs,
2438 * instead of having a static name, component-less DAIs would
2439 * inherit the name of the parent device so it is possible to
2440 * register multiple instances of the DAI. We still need to keep
2441 * the same naming style even though those DAIs are not
2442 * component-less anymore.
2444 if (legacy_dai_naming &&
2445 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2446 dai->name = fmt_single_name(dev, &dai->id);
2448 dai->name = fmt_multiple_name(dev, dai_drv);
2450 dai->id = dai_drv->id;
2452 dai->id = component->num_dai;
2457 dai->component = component;
2459 dai->driver = dai_drv;
2461 /* see for_each_component_dais */
2462 list_add_tail(&dai->list, &component->dai_list);
2463 component->num_dai++;
2465 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2468 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2471 * snd_soc_unregister_dais - Unregister DAIs from the ASoC core
2473 * @component: The component for which the DAIs should be unregistered
2475 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2477 struct snd_soc_dai *dai, *_dai;
2479 for_each_component_dais_safe(component, dai, _dai)
2480 snd_soc_unregister_dai(dai);
2484 * snd_soc_register_dais - Register a DAI with the ASoC core
2486 * @component: The component the DAIs are registered for
2487 * @dai_drv: DAI driver to use for the DAIs
2488 * @count: Number of DAIs
2490 static int snd_soc_register_dais(struct snd_soc_component *component,
2491 struct snd_soc_dai_driver *dai_drv,
2494 struct snd_soc_dai *dai;
2498 for (i = 0; i < count; i++) {
2499 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2500 !component->driver->non_legacy_dai_naming);
2510 snd_soc_unregister_dais(component);
2515 #define ENDIANNESS_MAP(name) \
2516 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2517 static u64 endianness_format_map[] = {
2518 ENDIANNESS_MAP(S16_),
2519 ENDIANNESS_MAP(U16_),
2520 ENDIANNESS_MAP(S24_),
2521 ENDIANNESS_MAP(U24_),
2522 ENDIANNESS_MAP(S32_),
2523 ENDIANNESS_MAP(U32_),
2524 ENDIANNESS_MAP(S24_3),
2525 ENDIANNESS_MAP(U24_3),
2526 ENDIANNESS_MAP(S20_3),
2527 ENDIANNESS_MAP(U20_3),
2528 ENDIANNESS_MAP(S18_3),
2529 ENDIANNESS_MAP(U18_3),
2530 ENDIANNESS_MAP(FLOAT_),
2531 ENDIANNESS_MAP(FLOAT64_),
2532 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2536 * Fix up the DAI formats for endianness: codecs don't actually see
2537 * the endianness of the data but we're using the CPU format
2538 * definitions which do need to include endianness so we ensure that
2539 * codec DAIs always have both big and little endian variants set.
2541 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2545 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2546 if (stream->formats & endianness_format_map[i])
2547 stream->formats |= endianness_format_map[i];
2550 static void snd_soc_try_rebind_card(void)
2552 struct snd_soc_card *card, *c;
2554 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2555 if (!snd_soc_bind_card(card))
2556 list_del(&card->list);
2559 static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2561 struct snd_soc_card *card = component->card;
2563 snd_soc_unregister_dais(component);
2566 snd_soc_unbind_card(card, false);
2568 list_del(&component->list);
2571 int snd_soc_component_initialize(struct snd_soc_component *component,
2572 const struct snd_soc_component_driver *driver,
2575 INIT_LIST_HEAD(&component->dai_list);
2576 INIT_LIST_HEAD(&component->dobj_list);
2577 INIT_LIST_HEAD(&component->card_list);
2578 INIT_LIST_HEAD(&component->list);
2579 mutex_init(&component->io_mutex);
2581 component->name = fmt_single_name(dev, &component->id);
2582 if (!component->name) {
2583 dev_err(dev, "ASoC: Failed to allocate name\n");
2587 component->dev = dev;
2588 component->driver = driver;
2590 #ifdef CONFIG_DEBUG_FS
2591 if (!component->debugfs_prefix)
2592 component->debugfs_prefix = driver->debugfs_prefix;
2597 EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
2599 int snd_soc_add_component(struct snd_soc_component *component,
2600 struct snd_soc_dai_driver *dai_drv,
2606 mutex_lock(&client_mutex);
2608 if (component->driver->endianness) {
2609 for (i = 0; i < num_dai; i++) {
2610 convert_endianness_formats(&dai_drv[i].playback);
2611 convert_endianness_formats(&dai_drv[i].capture);
2615 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2617 dev_err(component->dev, "ASoC: Failed to register DAIs: %d\n",
2622 if (!component->driver->write && !component->driver->read) {
2623 if (!component->regmap)
2624 component->regmap = dev_get_regmap(component->dev,
2626 if (component->regmap)
2627 snd_soc_component_setup_regmap(component);
2630 /* see for_each_component */
2631 list_add(&component->list, &component_list);
2635 snd_soc_del_component_unlocked(component);
2637 mutex_unlock(&client_mutex);
2640 snd_soc_try_rebind_card();
2644 EXPORT_SYMBOL_GPL(snd_soc_add_component);
2646 int snd_soc_register_component(struct device *dev,
2647 const struct snd_soc_component_driver *component_driver,
2648 struct snd_soc_dai_driver *dai_drv,
2651 struct snd_soc_component *component;
2654 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2658 ret = snd_soc_component_initialize(component, component_driver, dev);
2662 return snd_soc_add_component(component, dai_drv, num_dai);
2664 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2667 * snd_soc_unregister_component_by_driver - Unregister component using a given driver
2668 * from the ASoC core
2670 * @dev: The device to unregister
2671 * @component_driver: The component driver to unregister
2673 void snd_soc_unregister_component_by_driver(struct device *dev,
2674 const struct snd_soc_component_driver *component_driver)
2676 struct snd_soc_component *component;
2678 if (!component_driver)
2681 mutex_lock(&client_mutex);
2682 component = snd_soc_lookup_component_nolocked(dev, component_driver->name);
2686 snd_soc_del_component_unlocked(component);
2689 mutex_unlock(&client_mutex);
2691 EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
2694 * snd_soc_unregister_component - Unregister all related component
2695 * from the ASoC core
2697 * @dev: The device to unregister
2699 void snd_soc_unregister_component(struct device *dev)
2701 mutex_lock(&client_mutex);
2703 struct snd_soc_component *component = snd_soc_lookup_component_nolocked(dev, NULL);
2708 snd_soc_del_component_unlocked(component);
2710 mutex_unlock(&client_mutex);
2712 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2714 /* Retrieve a card's name from device tree */
2715 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2716 const char *propname)
2718 struct device_node *np;
2722 pr_err("card->dev is not set before calling %s\n", __func__);
2726 np = card->dev->of_node;
2728 ret = of_property_read_string_index(np, propname, 0, &card->name);
2730 * EINVAL means the property does not exist. This is fine providing
2731 * card->name was previously set, which is checked later in
2732 * snd_soc_register_card.
2734 if (ret < 0 && ret != -EINVAL) {
2736 "ASoC: Property '%s' could not be read: %d\n",
2743 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2745 static const struct snd_soc_dapm_widget simple_widgets[] = {
2746 SND_SOC_DAPM_MIC("Microphone", NULL),
2747 SND_SOC_DAPM_LINE("Line", NULL),
2748 SND_SOC_DAPM_HP("Headphone", NULL),
2749 SND_SOC_DAPM_SPK("Speaker", NULL),
2752 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2753 const char *propname)
2755 struct device_node *np = card->dev->of_node;
2756 struct snd_soc_dapm_widget *widgets;
2757 const char *template, *wname;
2758 int i, j, num_widgets;
2760 num_widgets = of_property_count_strings(np, propname);
2761 if (num_widgets < 0) {
2763 "ASoC: Property '%s' does not exist\n", propname);
2767 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2771 if (num_widgets & 1) {
2773 "ASoC: Property '%s' length is not even\n", propname);
2779 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2783 "ASoC: Could not allocate memory for widgets\n");
2787 for (i = 0; i < num_widgets; i++) {
2788 int ret = of_property_read_string_index(np, propname,
2792 "ASoC: Property '%s' index %d read error:%d\n",
2793 propname, 2 * i, ret);
2797 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
2798 if (!strncmp(template, simple_widgets[j].name,
2799 strlen(simple_widgets[j].name))) {
2800 widgets[i] = simple_widgets[j];
2805 if (j >= ARRAY_SIZE(simple_widgets)) {
2807 "ASoC: DAPM widget '%s' is not supported\n",
2812 ret = of_property_read_string_index(np, propname,
2817 "ASoC: Property '%s' index %d read error:%d\n",
2818 propname, (2 * i) + 1, ret);
2822 widgets[i].name = wname;
2825 card->of_dapm_widgets = widgets;
2826 card->num_of_dapm_widgets = num_widgets;
2830 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
2832 int snd_soc_of_parse_pin_switches(struct snd_soc_card *card, const char *prop)
2834 const unsigned int nb_controls_max = 16;
2835 const char **strings, *control_name;
2836 struct snd_kcontrol_new *controls;
2837 struct device *dev = card->dev;
2838 unsigned int i, nb_controls;
2841 if (!of_property_read_bool(dev->of_node, prop))
2844 strings = devm_kcalloc(dev, nb_controls_max,
2845 sizeof(*strings), GFP_KERNEL);
2849 ret = of_property_read_string_array(dev->of_node, prop,
2850 strings, nb_controls_max);
2854 nb_controls = (unsigned int)ret;
2856 controls = devm_kcalloc(dev, nb_controls,
2857 sizeof(*controls), GFP_KERNEL);
2861 for (i = 0; i < nb_controls; i++) {
2862 control_name = devm_kasprintf(dev, GFP_KERNEL,
2863 "%s Switch", strings[i]);
2867 controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
2868 controls[i].name = control_name;
2869 controls[i].info = snd_soc_dapm_info_pin_switch;
2870 controls[i].get = snd_soc_dapm_get_pin_switch;
2871 controls[i].put = snd_soc_dapm_put_pin_switch;
2872 controls[i].private_value = (unsigned long)strings[i];
2875 card->controls = controls;
2876 card->num_controls = nb_controls;
2880 EXPORT_SYMBOL_GPL(snd_soc_of_parse_pin_switches);
2882 int snd_soc_of_get_slot_mask(struct device_node *np,
2883 const char *prop_name,
2887 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
2893 for (i = 0; i < val; i++)
2894 if (be32_to_cpup(&of_slot_mask[i]))
2899 EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
2901 int snd_soc_of_parse_tdm_slot(struct device_node *np,
2902 unsigned int *tx_mask,
2903 unsigned int *rx_mask,
2904 unsigned int *slots,
2905 unsigned int *slot_width)
2911 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
2913 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
2915 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
2916 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
2924 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
2925 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
2935 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
2937 void snd_soc_of_parse_node_prefix(struct device_node *np,
2938 struct snd_soc_codec_conf *codec_conf,
2939 struct device_node *of_node,
2940 const char *propname)
2945 ret = of_property_read_string(np, propname, &str);
2947 /* no prefix is not error */
2951 codec_conf->dlc.of_node = of_node;
2952 codec_conf->name_prefix = str;
2954 EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
2956 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
2957 const char *propname)
2959 struct device_node *np = card->dev->of_node;
2961 struct snd_soc_dapm_route *routes;
2964 num_routes = of_property_count_strings(np, propname);
2965 if (num_routes < 0 || num_routes & 1) {
2967 "ASoC: Property '%s' does not exist or its length is not even\n",
2973 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
2977 "ASoC: Could not allocate DAPM route table\n");
2981 for (i = 0; i < num_routes; i++) {
2982 int ret = of_property_read_string_index(np, propname,
2983 2 * i, &routes[i].sink);
2986 "ASoC: Property '%s' index %d could not be read: %d\n",
2987 propname, 2 * i, ret);
2990 ret = of_property_read_string_index(np, propname,
2991 (2 * i) + 1, &routes[i].source);
2994 "ASoC: Property '%s' index %d could not be read: %d\n",
2995 propname, (2 * i) + 1, ret);
3000 card->num_of_dapm_routes = num_routes;
3001 card->of_dapm_routes = routes;
3005 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3007 int snd_soc_of_parse_aux_devs(struct snd_soc_card *card, const char *propname)
3009 struct device_node *node = card->dev->of_node;
3010 struct snd_soc_aux_dev *aux;
3013 num = of_count_phandle_with_args(node, propname, NULL);
3014 if (num == -ENOENT) {
3016 } else if (num < 0) {
3017 dev_err(card->dev, "ASOC: Property '%s' could not be read: %d\n",
3022 aux = devm_kcalloc(card->dev, num, sizeof(*aux), GFP_KERNEL);
3025 card->aux_dev = aux;
3026 card->num_aux_devs = num;
3028 for_each_card_pre_auxs(card, i, aux) {
3029 aux->dlc.of_node = of_parse_phandle(node, propname, i);
3030 if (!aux->dlc.of_node)
3036 EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs);
3038 unsigned int snd_soc_daifmt_clock_provider_flipped(unsigned int dai_fmt)
3040 unsigned int inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
3042 switch (dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
3043 case SND_SOC_DAIFMT_CBP_CFP:
3044 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFC;
3046 case SND_SOC_DAIFMT_CBP_CFC:
3047 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFP;
3049 case SND_SOC_DAIFMT_CBC_CFP:
3050 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFC;
3052 case SND_SOC_DAIFMT_CBC_CFC:
3053 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFP;
3059 EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_flipped);
3061 unsigned int snd_soc_daifmt_clock_provider_from_bitmap(unsigned int bit_frame)
3064 * bit_frame is return value from
3065 * snd_soc_daifmt_parse_clock_provider_raw()
3069 switch (bit_frame) {
3071 return SND_SOC_DAIFMT_CBP_CFP;
3073 return SND_SOC_DAIFMT_CBP_CFC;
3075 return SND_SOC_DAIFMT_CBC_CFP;
3077 return SND_SOC_DAIFMT_CBC_CFC;
3082 EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_from_bitmap);
3084 unsigned int snd_soc_daifmt_parse_format(struct device_node *np,
3089 unsigned int format = 0;
3095 } of_fmt_table[] = {
3096 { "i2s", SND_SOC_DAIFMT_I2S },
3097 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3098 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3099 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3100 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3101 { "ac97", SND_SOC_DAIFMT_AC97 },
3102 { "pdm", SND_SOC_DAIFMT_PDM},
3103 { "msb", SND_SOC_DAIFMT_MSB },
3104 { "lsb", SND_SOC_DAIFMT_LSB },
3111 * check "dai-format = xxx"
3112 * or "[prefix]format = xxx"
3113 * SND_SOC_DAIFMT_FORMAT_MASK area
3115 ret = of_property_read_string(np, "dai-format", &str);
3117 snprintf(prop, sizeof(prop), "%sformat", prefix);
3118 ret = of_property_read_string(np, prop, &str);
3123 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3124 if (strcmp(str, of_fmt_table[i].name) == 0) {
3125 format |= of_fmt_table[i].val;
3132 * check "[prefix]continuous-clock"
3133 * SND_SOC_DAIFMT_CLOCK_MASK area
3135 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3136 if (of_property_read_bool(np, prop))
3137 format |= SND_SOC_DAIFMT_CONT;
3139 format |= SND_SOC_DAIFMT_GATED;
3142 * check "[prefix]bitclock-inversion"
3143 * check "[prefix]frame-inversion"
3144 * SND_SOC_DAIFMT_INV_MASK area
3146 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3147 bit = !!of_get_property(np, prop, NULL);
3149 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3150 frame = !!of_get_property(np, prop, NULL);
3152 switch ((bit << 4) + frame) {
3154 format |= SND_SOC_DAIFMT_IB_IF;
3157 format |= SND_SOC_DAIFMT_IB_NF;
3160 format |= SND_SOC_DAIFMT_NB_IF;
3163 /* SND_SOC_DAIFMT_NB_NF is default */
3169 EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_format);
3171 unsigned int snd_soc_daifmt_parse_clock_provider_raw(struct device_node *np,
3173 struct device_node **bitclkmaster,
3174 struct device_node **framemaster)
3177 unsigned int bit, frame;
3183 * check "[prefix]bitclock-master"
3184 * check "[prefix]frame-master"
3186 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3187 bit = !!of_get_property(np, prop, NULL);
3188 if (bit && bitclkmaster)
3189 *bitclkmaster = of_parse_phandle(np, prop, 0);
3191 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3192 frame = !!of_get_property(np, prop, NULL);
3193 if (frame && framemaster)
3194 *framemaster = of_parse_phandle(np, prop, 0);
3198 * It will be parameter of
3199 * snd_soc_daifmt_clock_provider_from_bitmap()
3201 return (bit << 4) + frame;
3203 EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_clock_provider_raw);
3205 int snd_soc_get_dai_id(struct device_node *ep)
3207 struct snd_soc_component *component;
3208 struct snd_soc_dai_link_component dlc;
3211 dlc.of_node = of_graph_get_port_parent(ep);
3214 * For example HDMI case, HDMI has video/sound port,
3215 * but ALSA SoC needs sound port number only.
3216 * Thus counting HDMI DT port/endpoint doesn't work.
3217 * Then, it should have .of_xlate_dai_id
3220 mutex_lock(&client_mutex);
3221 component = soc_find_component(&dlc);
3223 ret = snd_soc_component_of_xlate_dai_id(component, ep);
3224 mutex_unlock(&client_mutex);
3226 of_node_put(dlc.of_node);
3230 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3232 int snd_soc_get_dai_name(const struct of_phandle_args *args,
3233 const char **dai_name)
3235 struct snd_soc_component *pos;
3236 int ret = -EPROBE_DEFER;
3238 mutex_lock(&client_mutex);
3239 for_each_component(pos) {
3240 struct device_node *component_of_node = soc_component_to_node(pos);
3242 if (component_of_node != args->np || !pos->num_dai)
3245 ret = snd_soc_component_of_xlate_dai_name(pos, args, dai_name);
3246 if (ret == -ENOTSUPP) {
3247 struct snd_soc_dai *dai;
3250 switch (args->args_count) {
3252 id = 0; /* same as dai_drv[0] */
3262 if (id < 0 || id >= pos->num_dai) {
3269 /* find target DAI */
3270 for_each_component_dais(pos, dai) {
3276 *dai_name = dai->driver->name;
3278 *dai_name = pos->name;
3281 * if another error than ENOTSUPP is returned go on and
3282 * check if another component is provided with the same
3283 * node. This may happen if a device provides several
3291 mutex_unlock(&client_mutex);
3294 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3296 int snd_soc_of_get_dai_name(struct device_node *of_node,
3297 const char **dai_name)
3299 struct of_phandle_args args;
3302 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3303 "#sound-dai-cells", 0, &args);
3307 ret = snd_soc_get_dai_name(&args, dai_name);
3309 of_node_put(args.np);
3313 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3316 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3317 * @dai_link: DAI link
3319 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3321 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3323 struct snd_soc_dai_link_component *component;
3326 for_each_link_codecs(dai_link, index, component) {
3327 if (!component->of_node)
3329 of_node_put(component->of_node);
3330 component->of_node = NULL;
3333 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3336 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3338 * @of_node: Device node
3339 * @dai_link: DAI link
3341 * Builds an array of CODEC DAI components from the DAI link property
3343 * The array is set in the DAI link and the number of DAIs is set accordingly.
3344 * The device nodes in the array (of_node) must be dereferenced by calling
3345 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3347 * Returns 0 for success
3349 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3350 struct device_node *of_node,
3351 struct snd_soc_dai_link *dai_link)
3353 struct of_phandle_args args;
3354 struct snd_soc_dai_link_component *component;
3356 int index, num_codecs, ret;
3358 /* Count the number of CODECs */
3360 num_codecs = of_count_phandle_with_args(of_node, name,
3361 "#sound-dai-cells");
3362 if (num_codecs <= 0) {
3363 if (num_codecs == -ENOENT)
3364 dev_err(dev, "No 'sound-dai' property\n");
3366 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3369 component = devm_kcalloc(dev,
3370 num_codecs, sizeof(*component),
3374 dai_link->codecs = component;
3375 dai_link->num_codecs = num_codecs;
3377 /* Parse the list */
3378 for_each_link_codecs(dai_link, index, component) {
3379 ret = of_parse_phandle_with_args(of_node, name,
3384 component->of_node = args.np;
3385 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3391 snd_soc_of_put_dai_link_codecs(dai_link);
3392 dai_link->codecs = NULL;
3393 dai_link->num_codecs = 0;
3396 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3399 * snd_soc_of_put_dai_link_cpus - Dereference device nodes in the codecs array
3400 * @dai_link: DAI link
3402 * Dereference device nodes acquired by snd_soc_of_get_dai_link_cpus().
3404 void snd_soc_of_put_dai_link_cpus(struct snd_soc_dai_link *dai_link)
3406 struct snd_soc_dai_link_component *component;
3409 for_each_link_cpus(dai_link, index, component) {
3410 if (!component->of_node)
3412 of_node_put(component->of_node);
3413 component->of_node = NULL;
3416 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_cpus);
3419 * snd_soc_of_get_dai_link_cpus - Parse a list of CPU DAIs in the devicetree
3421 * @of_node: Device node
3422 * @dai_link: DAI link
3424 * Is analogous to snd_soc_of_get_dai_link_codecs but parses a list of CPU DAIs
3427 * Returns 0 for success
3429 int snd_soc_of_get_dai_link_cpus(struct device *dev,
3430 struct device_node *of_node,
3431 struct snd_soc_dai_link *dai_link)
3433 struct of_phandle_args args;
3434 struct snd_soc_dai_link_component *component;
3436 int index, num_codecs, ret;
3438 /* Count the number of CODECs */
3440 num_codecs = of_count_phandle_with_args(of_node, name,
3441 "#sound-dai-cells");
3442 if (num_codecs <= 0) {
3443 if (num_codecs == -ENOENT)
3444 dev_err(dev, "No 'sound-dai' property\n");
3446 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3449 component = devm_kcalloc(dev,
3450 num_codecs, sizeof(*component),
3454 dai_link->cpus = component;
3455 dai_link->num_cpus = num_codecs;
3457 /* Parse the list */
3458 for_each_link_cpus(dai_link, index, component) {
3459 ret = of_parse_phandle_with_args(of_node, name,
3464 component->of_node = args.np;
3465 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3471 snd_soc_of_put_dai_link_codecs(dai_link);
3472 dai_link->cpus = NULL;
3473 dai_link->num_cpus = 0;
3476 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_cpus);
3478 static int __init snd_soc_init(void)
3480 snd_soc_debugfs_init();
3481 snd_soc_util_init();
3483 return platform_driver_register(&soc_driver);
3485 module_init(snd_soc_init);
3487 static void __exit snd_soc_exit(void)
3489 snd_soc_util_exit();
3490 snd_soc_debugfs_exit();
3492 platform_driver_unregister(&soc_driver);
3494 module_exit(snd_soc_exit);
3496 /* Module information */
3497 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3498 MODULE_DESCRIPTION("ALSA SoC Core");
3499 MODULE_LICENSE("GPL");
3500 MODULE_ALIAS("platform:soc-audio");