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)
1094 /* create the pcm */
1095 ret = soc_new_pcm(rtd, num);
1097 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1098 dai_link->stream_name, ret);
1102 return snd_soc_pcm_dai_new(rtd);
1105 static void soc_set_name_prefix(struct snd_soc_card *card,
1106 struct snd_soc_component *component)
1108 struct device_node *of_node = soc_component_to_node(component);
1112 for (i = 0; i < card->num_configs; i++) {
1113 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1115 if (snd_soc_is_matching_component(&map->dlc, component) &&
1117 component->name_prefix = map->name_prefix;
1123 * If there is no configuration table or no match in the table,
1124 * check if a prefix is provided in the node
1126 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1130 component->name_prefix = str;
1133 static void soc_remove_component(struct snd_soc_component *component,
1137 if (!component->card)
1141 snd_soc_component_remove(component);
1143 /* For framework level robustness */
1144 snd_soc_component_set_jack(component, NULL, NULL);
1146 list_del_init(&component->card_list);
1147 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1148 soc_cleanup_component_debugfs(component);
1149 component->card = NULL;
1150 snd_soc_component_module_put_when_remove(component);
1153 static int soc_probe_component(struct snd_soc_card *card,
1154 struct snd_soc_component *component)
1156 struct snd_soc_dapm_context *dapm =
1157 snd_soc_component_get_dapm(component);
1158 struct snd_soc_dai *dai;
1162 if (!strcmp(component->name, "snd-soc-dummy"))
1165 if (component->card) {
1166 if (component->card != card) {
1167 dev_err(component->dev,
1168 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1169 card->name, component->card->name);
1175 ret = snd_soc_component_module_get_when_probe(component);
1179 component->card = card;
1180 soc_set_name_prefix(card, component);
1182 soc_init_component_debugfs(component);
1184 snd_soc_dapm_init(dapm, card, component);
1186 ret = snd_soc_dapm_new_controls(dapm,
1187 component->driver->dapm_widgets,
1188 component->driver->num_dapm_widgets);
1191 dev_err(component->dev,
1192 "Failed to create new controls %d\n", ret);
1196 for_each_component_dais(component, dai) {
1197 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1199 dev_err(component->dev,
1200 "Failed to create DAI widgets %d\n", ret);
1205 ret = snd_soc_component_probe(component);
1209 WARN(dapm->idle_bias_off &&
1210 dapm->bias_level != SND_SOC_BIAS_OFF,
1211 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1216 * machine specific init
1218 * snd_soc_component_set_aux()
1220 ret = snd_soc_component_init(component);
1224 ret = snd_soc_add_component_controls(component,
1225 component->driver->controls,
1226 component->driver->num_controls);
1230 ret = snd_soc_dapm_add_routes(dapm,
1231 component->driver->dapm_routes,
1232 component->driver->num_dapm_routes);
1234 if (card->disable_route_checks) {
1236 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1240 "%s: snd_soc_dapm_add_routes failed: %d\n",
1246 /* see for_each_card_components */
1247 list_add(&component->card_list, &card->component_dev_list);
1251 soc_remove_component(component, probed);
1256 static void soc_remove_link_dais(struct snd_soc_card *card)
1258 struct snd_soc_pcm_runtime *rtd;
1261 for_each_comp_order(order) {
1262 for_each_card_rtds(card, rtd) {
1263 /* remove all rtd connected DAIs in good order */
1264 snd_soc_pcm_dai_remove(rtd, order);
1269 static int soc_probe_link_dais(struct snd_soc_card *card)
1271 struct snd_soc_pcm_runtime *rtd;
1274 for_each_comp_order(order) {
1275 for_each_card_rtds(card, rtd) {
1278 "ASoC: probe %s dai link %d late %d\n",
1279 card->name, rtd->num, order);
1281 /* probe all rtd connected DAIs in good order */
1282 ret = snd_soc_pcm_dai_probe(rtd, order);
1291 static void soc_remove_link_components(struct snd_soc_card *card)
1293 struct snd_soc_component *component;
1294 struct snd_soc_pcm_runtime *rtd;
1297 for_each_comp_order(order) {
1298 for_each_card_rtds(card, rtd) {
1299 for_each_rtd_components(rtd, i, component) {
1300 if (component->driver->remove_order != order)
1303 soc_remove_component(component, 1);
1309 static int soc_probe_link_components(struct snd_soc_card *card)
1311 struct snd_soc_component *component;
1312 struct snd_soc_pcm_runtime *rtd;
1315 for_each_comp_order(order) {
1316 for_each_card_rtds(card, rtd) {
1317 for_each_rtd_components(rtd, i, component) {
1318 if (component->driver->probe_order != order)
1321 ret = soc_probe_component(card, component);
1331 static void soc_unbind_aux_dev(struct snd_soc_card *card)
1333 struct snd_soc_component *component, *_component;
1335 for_each_card_auxs_safe(card, component, _component) {
1336 /* for snd_soc_component_init() */
1337 snd_soc_component_set_aux(component, NULL);
1338 list_del(&component->card_aux_list);
1342 static int soc_bind_aux_dev(struct snd_soc_card *card)
1344 struct snd_soc_component *component;
1345 struct snd_soc_aux_dev *aux;
1348 for_each_card_pre_auxs(card, i, aux) {
1349 /* codecs, usually analog devices */
1350 component = soc_find_component(&aux->dlc);
1352 return -EPROBE_DEFER;
1354 /* for snd_soc_component_init() */
1355 snd_soc_component_set_aux(component, aux);
1356 /* see for_each_card_auxs */
1357 list_add(&component->card_aux_list, &card->aux_comp_list);
1362 static int soc_probe_aux_devices(struct snd_soc_card *card)
1364 struct snd_soc_component *component;
1368 for_each_comp_order(order) {
1369 for_each_card_auxs(card, component) {
1370 if (component->driver->probe_order != order)
1373 ret = soc_probe_component(card, component);
1382 static void soc_remove_aux_devices(struct snd_soc_card *card)
1384 struct snd_soc_component *comp, *_comp;
1387 for_each_comp_order(order) {
1388 for_each_card_auxs_safe(card, comp, _comp) {
1389 if (comp->driver->remove_order == order)
1390 soc_remove_component(comp, 1);
1396 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1397 * @rtd: The runtime for which the DAI link format should be changed
1398 * @dai_fmt: The new DAI link format
1400 * This function updates the DAI link format for all DAIs connected to the DAI
1401 * link for the specified runtime.
1403 * Note: For setups with a static format set the dai_fmt field in the
1404 * corresponding snd_dai_link struct instead of using this function.
1406 * Returns 0 on success, otherwise a negative error code.
1408 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1409 unsigned int dai_fmt)
1411 struct snd_soc_dai *cpu_dai;
1412 struct snd_soc_dai *codec_dai;
1413 unsigned int inv_dai_fmt;
1417 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1418 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1419 if (ret != 0 && ret != -ENOTSUPP)
1424 * Flip the polarity for the "CPU" end of a CODEC<->CODEC link
1425 * the component which has non_legacy_dai_naming is Codec
1427 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1428 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1429 case SND_SOC_DAIFMT_CBM_CFM:
1430 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1432 case SND_SOC_DAIFMT_CBM_CFS:
1433 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1435 case SND_SOC_DAIFMT_CBS_CFM:
1436 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1438 case SND_SOC_DAIFMT_CBS_CFS:
1439 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1442 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1443 unsigned int fmt = dai_fmt;
1445 if (cpu_dai->component->driver->non_legacy_dai_naming)
1448 ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
1449 if (ret != 0 && ret != -ENOTSUPP)
1455 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1459 * If a DMI filed contain strings in this blacklist (e.g.
1460 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
1461 * as invalid and dropped when setting the card long name from DMI info.
1463 static const char * const dmi_blacklist[] = {
1464 "To be filled by OEM",
1467 "Board Manufacturer",
1468 "Board Vendor Name",
1469 "Board Product Name",
1470 NULL, /* terminator */
1474 * Trim special characters, and replace '-' with '_' since '-' is used to
1475 * separate different DMI fields in the card long name. Only number and
1476 * alphabet characters and a few separator characters are kept.
1478 static void cleanup_dmi_name(char *name)
1482 for (i = 0; name[i]; i++) {
1483 if (isalnum(name[i]) || (name[i] == '.')
1484 || (name[i] == '_'))
1485 name[j++] = name[i];
1486 else if (name[i] == '-')
1494 * Check if a DMI field is valid, i.e. not containing any string
1495 * in the black list.
1497 static int is_dmi_valid(const char *field)
1501 while (dmi_blacklist[i]) {
1502 if (strstr(field, dmi_blacklist[i]))
1511 * Append a string to card->dmi_longname with character cleanups.
1513 static void append_dmi_string(struct snd_soc_card *card, const char *str)
1515 char *dst = card->dmi_longname;
1516 size_t dst_len = sizeof(card->dmi_longname);
1520 snprintf(dst + len, dst_len - len, "-%s", str);
1522 len++; /* skip the separator "-" */
1524 cleanup_dmi_name(dst + len);
1528 * snd_soc_set_dmi_name() - Register DMI names to card
1529 * @card: The card to register DMI names
1530 * @flavour: The flavour "differentiator" for the card amongst its peers.
1532 * An Intel machine driver may be used by many different devices but are
1533 * difficult for userspace to differentiate, since machine drivers ususally
1534 * use their own name as the card short name and leave the card long name
1535 * blank. To differentiate such devices and fix bugs due to lack of
1536 * device-specific configurations, this function allows DMI info to be used
1537 * as the sound card long name, in the format of
1538 * "vendor-product-version-board"
1539 * (Character '-' is used to separate different DMI fields here).
1540 * This will help the user space to load the device-specific Use Case Manager
1541 * (UCM) configurations for the card.
1543 * Possible card long names may be:
1544 * DellInc.-XPS139343-01-0310JH
1545 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1546 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1548 * This function also supports flavoring the card longname to provide
1549 * the extra differentiation, like "vendor-product-version-board-flavor".
1551 * We only keep number and alphabet characters and a few separator characters
1552 * in the card long name since UCM in the user space uses the card long names
1553 * as card configuration directory names and AudoConf cannot support special
1554 * charactors like SPACE.
1556 * Returns 0 on success, otherwise a negative error code.
1558 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1560 const char *vendor, *product, *product_version, *board;
1562 if (card->long_name)
1563 return 0; /* long name already set by driver or from DMI */
1568 /* make up dmi long name as: vendor-product-version-board */
1569 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1570 if (!vendor || !is_dmi_valid(vendor)) {
1571 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1575 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1576 cleanup_dmi_name(card->dmi_longname);
1578 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1579 if (product && is_dmi_valid(product)) {
1580 append_dmi_string(card, product);
1583 * some vendors like Lenovo may only put a self-explanatory
1584 * name in the product version field
1586 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1587 if (product_version && is_dmi_valid(product_version))
1588 append_dmi_string(card, product_version);
1591 board = dmi_get_system_info(DMI_BOARD_NAME);
1592 if (board && is_dmi_valid(board)) {
1593 if (!product || strcasecmp(board, product))
1594 append_dmi_string(card, board);
1595 } else if (!product) {
1596 /* fall back to using legacy name */
1597 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1601 /* Add flavour to dmi long name */
1603 append_dmi_string(card, flavour);
1605 /* set the card long name */
1606 card->long_name = card->dmi_longname;
1610 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1611 #endif /* CONFIG_DMI */
1613 static void soc_check_tplg_fes(struct snd_soc_card *card)
1615 struct snd_soc_component *component;
1616 const struct snd_soc_component_driver *comp_drv;
1617 struct snd_soc_dai_link *dai_link;
1620 for_each_component(component) {
1622 /* does this component override BEs ? */
1623 if (!component->driver->ignore_machine)
1626 /* for this machine ? */
1627 if (!strcmp(component->driver->ignore_machine,
1628 card->dev->driver->name))
1630 if (strcmp(component->driver->ignore_machine,
1631 dev_name(card->dev)))
1634 /* machine matches, so override the rtd data */
1635 for_each_card_prelinks(card, i, dai_link) {
1637 /* ignore this FE */
1638 if (dai_link->dynamic) {
1639 dai_link->ignore = true;
1643 dev_dbg(card->dev, "info: override BE DAI link %s\n",
1644 card->dai_link[i].name);
1646 /* override platform component */
1647 if (!dai_link->platforms) {
1648 dev_err(card->dev, "init platform error");
1651 dai_link->platforms->name = component->name;
1653 /* convert non BE into BE */
1654 if (!dai_link->no_pcm) {
1655 dai_link->no_pcm = 1;
1657 if (dai_link->dpcm_playback)
1659 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_playback=1\n",
1661 if (dai_link->dpcm_capture)
1663 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_capture=1\n",
1666 /* convert normal link into DPCM one */
1667 if (!(dai_link->dpcm_playback ||
1668 dai_link->dpcm_capture)) {
1669 dai_link->dpcm_playback = !dai_link->capture_only;
1670 dai_link->dpcm_capture = !dai_link->playback_only;
1675 * override any BE fixups
1677 * snd_soc_link_be_hw_params_fixup()
1679 dai_link->be_hw_params_fixup =
1680 component->driver->be_hw_params_fixup;
1683 * most BE links don't set stream name, so set it to
1684 * dai link name if it's NULL to help bind widgets.
1686 if (!dai_link->stream_name)
1687 dai_link->stream_name = dai_link->name;
1690 /* Inform userspace we are using alternate topology */
1691 if (component->driver->topology_name_prefix) {
1693 /* topology shortname created? */
1694 if (!card->topology_shortname_created) {
1695 comp_drv = component->driver;
1697 snprintf(card->topology_shortname, 32, "%s-%s",
1698 comp_drv->topology_name_prefix,
1700 card->topology_shortname_created = true;
1703 /* use topology shortname */
1704 card->name = card->topology_shortname;
1709 #define soc_setup_card_name(name, name1, name2, norm) \
1710 __soc_setup_card_name(name, sizeof(name), name1, name2, norm)
1711 static void __soc_setup_card_name(char *name, int len,
1712 const char *name1, const char *name2,
1717 snprintf(name, len, "%s", name1 ? name1 : name2);
1723 * Name normalization
1725 * The driver name is somewhat special, as it's used as a key for
1726 * searches in the user-space.
1729 * "abcd??efg" -> "abcd__efg"
1731 for (i = 0; i < len; i++) {
1738 if (!isalnum(name[i]))
1745 static void soc_cleanup_card_resources(struct snd_soc_card *card)
1747 struct snd_soc_pcm_runtime *rtd, *n;
1750 snd_card_disconnect_sync(card->snd_card);
1752 snd_soc_dapm_shutdown(card);
1754 /* remove and free each DAI */
1755 soc_remove_link_dais(card);
1756 soc_remove_link_components(card);
1758 for_each_card_rtds_safe(card, rtd, n)
1759 snd_soc_remove_pcm_runtime(card, rtd);
1761 /* remove auxiliary devices */
1762 soc_remove_aux_devices(card);
1763 soc_unbind_aux_dev(card);
1765 snd_soc_dapm_free(&card->dapm);
1766 soc_cleanup_card_debugfs(card);
1768 /* remove the card */
1769 snd_soc_card_remove(card);
1771 if (card->snd_card) {
1772 snd_card_free(card->snd_card);
1773 card->snd_card = NULL;
1777 static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
1779 if (card->instantiated) {
1780 card->instantiated = false;
1781 snd_soc_flush_all_delayed_work(card);
1783 soc_cleanup_card_resources(card);
1785 list_add(&card->list, &unbind_card_list);
1788 list_del(&card->list);
1792 static int snd_soc_bind_card(struct snd_soc_card *card)
1794 struct snd_soc_pcm_runtime *rtd;
1795 struct snd_soc_component *component;
1796 struct snd_soc_dai_link *dai_link;
1799 mutex_lock(&client_mutex);
1800 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1802 snd_soc_dapm_init(&card->dapm, card, NULL);
1804 /* check whether any platform is ignore machine FE and using topology */
1805 soc_check_tplg_fes(card);
1807 /* bind aux_devs too */
1808 ret = soc_bind_aux_dev(card);
1812 /* add predefined DAI links to the list */
1814 for_each_card_prelinks(card, i, dai_link) {
1815 ret = snd_soc_add_pcm_runtime(card, dai_link);
1820 /* card bind complete so register a sound card */
1821 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1822 card->owner, 0, &card->snd_card);
1825 "ASoC: can't create sound card for card %s: %d\n",
1830 soc_init_card_debugfs(card);
1832 soc_resume_init(card);
1834 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1835 card->num_dapm_widgets);
1839 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
1840 card->num_of_dapm_widgets);
1844 /* initialise the sound card only once */
1845 ret = snd_soc_card_probe(card);
1849 /* probe all components used by DAI links on this card */
1850 ret = soc_probe_link_components(card);
1853 "ASoC: failed to instantiate card %d\n", ret);
1857 /* probe auxiliary components */
1858 ret = soc_probe_aux_devices(card);
1861 "ASoC: failed to probe aux component %d\n", ret);
1865 /* probe all DAI links on this card */
1866 ret = soc_probe_link_dais(card);
1869 "ASoC: failed to instantiate card %d\n", ret);
1873 for_each_card_rtds(card, rtd) {
1874 ret = soc_init_pcm_runtime(card, rtd);
1879 snd_soc_dapm_link_dai_widgets(card);
1880 snd_soc_dapm_connect_dai_link_widgets(card);
1882 ret = snd_soc_add_card_controls(card, card->controls,
1883 card->num_controls);
1887 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1888 card->num_dapm_routes);
1890 if (card->disable_route_checks) {
1892 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1896 "%s: snd_soc_dapm_add_routes failed: %d\n",
1902 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
1903 card->num_of_dapm_routes);
1907 /* try to set some sane longname if DMI is available */
1908 snd_soc_set_dmi_name(card, NULL);
1910 soc_setup_card_name(card->snd_card->shortname,
1911 card->name, NULL, 0);
1912 soc_setup_card_name(card->snd_card->longname,
1913 card->long_name, card->name, 0);
1914 soc_setup_card_name(card->snd_card->driver,
1915 card->driver_name, card->name, 1);
1917 if (card->components) {
1918 /* the current implementation of snd_component_add() accepts */
1919 /* multiple components in the string separated by space, */
1920 /* but the string collision (identical string) check might */
1921 /* not work correctly */
1922 ret = snd_component_add(card->snd_card, card->components);
1924 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
1930 ret = snd_soc_card_late_probe(card);
1934 snd_soc_dapm_new_widgets(card);
1936 ret = snd_card_register(card->snd_card);
1938 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1943 card->instantiated = 1;
1944 dapm_mark_endpoints_dirty(card);
1945 snd_soc_dapm_sync(&card->dapm);
1947 /* deactivate pins to sleep state */
1948 for_each_card_components(card, component)
1949 if (!snd_soc_component_active(component))
1950 pinctrl_pm_select_sleep_state(component->dev);
1954 soc_cleanup_card_resources(card);
1956 mutex_unlock(&card->mutex);
1957 mutex_unlock(&client_mutex);
1962 /* probes a new socdev */
1963 static int soc_probe(struct platform_device *pdev)
1965 struct snd_soc_card *card = platform_get_drvdata(pdev);
1968 * no card, so machine driver should be registering card
1969 * we should not be here in that case so ret error
1974 dev_warn(&pdev->dev,
1975 "ASoC: machine %s should use snd_soc_register_card()\n",
1978 /* Bodge while we unpick instantiation */
1979 card->dev = &pdev->dev;
1981 return devm_snd_soc_register_card(&pdev->dev, card);
1984 int snd_soc_poweroff(struct device *dev)
1986 struct snd_soc_card *card = dev_get_drvdata(dev);
1987 struct snd_soc_component *component;
1989 if (!card->instantiated)
1993 * Flush out pmdown_time work - we actually do want to run it
1994 * now, we're shutting down so no imminent restart.
1996 snd_soc_flush_all_delayed_work(card);
1998 snd_soc_dapm_shutdown(card);
2000 /* deactivate pins to sleep state */
2001 for_each_card_components(card, component)
2002 pinctrl_pm_select_sleep_state(component->dev);
2006 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2008 const struct dev_pm_ops snd_soc_pm_ops = {
2009 .suspend = snd_soc_suspend,
2010 .resume = snd_soc_resume,
2011 .freeze = snd_soc_suspend,
2012 .thaw = snd_soc_resume,
2013 .poweroff = snd_soc_poweroff,
2014 .restore = snd_soc_resume,
2016 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2018 /* ASoC platform driver */
2019 static struct platform_driver soc_driver = {
2021 .name = "soc-audio",
2022 .pm = &snd_soc_pm_ops,
2028 * snd_soc_cnew - create new control
2029 * @_template: control template
2030 * @data: control private data
2031 * @long_name: control long name
2032 * @prefix: control name prefix
2034 * Create a new mixer control from a template control.
2036 * Returns 0 for success, else error.
2038 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2039 void *data, const char *long_name,
2042 struct snd_kcontrol_new template;
2043 struct snd_kcontrol *kcontrol;
2046 memcpy(&template, _template, sizeof(template));
2050 long_name = template.name;
2053 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2057 template.name = name;
2059 template.name = long_name;
2062 kcontrol = snd_ctl_new1(&template, data);
2068 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2070 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2071 const struct snd_kcontrol_new *controls, int num_controls,
2072 const char *prefix, void *data)
2076 for (i = 0; i < num_controls; i++) {
2077 const struct snd_kcontrol_new *control = &controls[i];
2079 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2080 control->name, prefix));
2082 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2083 control->name, err);
2092 * snd_soc_add_component_controls - Add an array of controls to a component.
2094 * @component: Component to add controls to
2095 * @controls: Array of controls to add
2096 * @num_controls: Number of elements in the array
2098 * Return: 0 for success, else error.
2100 int snd_soc_add_component_controls(struct snd_soc_component *component,
2101 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2103 struct snd_card *card = component->card->snd_card;
2105 return snd_soc_add_controls(card, component->dev, controls,
2106 num_controls, component->name_prefix, component);
2108 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2111 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2112 * Convenience function to add a list of controls.
2114 * @soc_card: SoC card to add controls to
2115 * @controls: array of controls to add
2116 * @num_controls: number of elements in the array
2118 * Return 0 for success, else error.
2120 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2121 const struct snd_kcontrol_new *controls, int num_controls)
2123 struct snd_card *card = soc_card->snd_card;
2125 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2128 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2131 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2132 * Convienience function to add a list of controls.
2134 * @dai: DAI to add controls to
2135 * @controls: array of controls to add
2136 * @num_controls: number of elements in the array
2138 * Return 0 for success, else error.
2140 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2141 const struct snd_kcontrol_new *controls, int num_controls)
2143 struct snd_card *card = dai->component->card->snd_card;
2145 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2148 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2151 * snd_soc_register_card - Register a card with the ASoC core
2153 * @card: Card to register
2156 int snd_soc_register_card(struct snd_soc_card *card)
2158 if (!card->name || !card->dev)
2161 dev_set_drvdata(card->dev, card);
2163 INIT_LIST_HEAD(&card->widgets);
2164 INIT_LIST_HEAD(&card->paths);
2165 INIT_LIST_HEAD(&card->dapm_list);
2166 INIT_LIST_HEAD(&card->aux_comp_list);
2167 INIT_LIST_HEAD(&card->component_dev_list);
2168 INIT_LIST_HEAD(&card->list);
2169 INIT_LIST_HEAD(&card->rtd_list);
2170 INIT_LIST_HEAD(&card->dapm_dirty);
2171 INIT_LIST_HEAD(&card->dobj_list);
2173 card->instantiated = 0;
2174 mutex_init(&card->mutex);
2175 mutex_init(&card->dapm_mutex);
2176 mutex_init(&card->pcm_mutex);
2177 spin_lock_init(&card->dpcm_lock);
2179 return snd_soc_bind_card(card);
2181 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2184 * snd_soc_unregister_card - Unregister a card with the ASoC core
2186 * @card: Card to unregister
2189 int snd_soc_unregister_card(struct snd_soc_card *card)
2191 mutex_lock(&client_mutex);
2192 snd_soc_unbind_card(card, true);
2193 mutex_unlock(&client_mutex);
2194 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2198 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2201 * Simplify DAI link configuration by removing ".-1" from device names
2202 * and sanitizing names.
2204 static char *fmt_single_name(struct device *dev, int *id)
2206 const char *devname = dev_name(dev);
2210 if (devname == NULL)
2213 name = devm_kstrdup(dev, devname, GFP_KERNEL);
2215 /* are we a "%s.%d" name (platform and SPI components) */
2216 found = strstr(name, dev->driver->name);
2219 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2221 /* discard ID from name if ID == -1 */
2223 found[strlen(dev->driver->name)] = '\0';
2226 /* I2C component devices are named "bus-addr" */
2227 } else if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2229 /* create unique ID number from I2C addr and bus */
2230 *id = ((id1 & 0xffff) << 16) + id2;
2232 devm_kfree(dev, name);
2234 /* sanitize component name for DAI link creation */
2235 name = devm_kasprintf(dev, GFP_KERNEL, "%s.%s", dev->driver->name, devname);
2244 * Simplify DAI link naming for single devices with multiple DAIs by removing
2245 * any ".-1" and using the DAI name (instead of device name).
2247 static inline char *fmt_multiple_name(struct device *dev,
2248 struct snd_soc_dai_driver *dai_drv)
2250 if (dai_drv->name == NULL) {
2252 "ASoC: error - multiple DAI %s registered with no name\n",
2257 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2260 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2262 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2263 list_del(&dai->list);
2265 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2268 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2270 * @component: The component the DAIs are registered for
2271 * @dai_drv: DAI driver to use for the DAI
2272 * @legacy_dai_naming: if %true, use legacy single-name format;
2273 * if %false, use multiple-name format;
2275 * Topology can use this API to register DAIs when probing a component.
2276 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2277 * will be freed in the component cleanup.
2279 struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2280 struct snd_soc_dai_driver *dai_drv,
2281 bool legacy_dai_naming)
2283 struct device *dev = component->dev;
2284 struct snd_soc_dai *dai;
2286 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2288 lockdep_assert_held(&client_mutex);
2290 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2295 * Back in the old days when we still had component-less DAIs,
2296 * instead of having a static name, component-less DAIs would
2297 * inherit the name of the parent device so it is possible to
2298 * register multiple instances of the DAI. We still need to keep
2299 * the same naming style even though those DAIs are not
2300 * component-less anymore.
2302 if (legacy_dai_naming &&
2303 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2304 dai->name = fmt_single_name(dev, &dai->id);
2306 dai->name = fmt_multiple_name(dev, dai_drv);
2308 dai->id = dai_drv->id;
2310 dai->id = component->num_dai;
2315 dai->component = component;
2317 dai->driver = dai_drv;
2319 /* see for_each_component_dais */
2320 list_add_tail(&dai->list, &component->dai_list);
2321 component->num_dai++;
2323 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2328 * snd_soc_unregister_dais - Unregister DAIs from the ASoC core
2330 * @component: The component for which the DAIs should be unregistered
2332 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2334 struct snd_soc_dai *dai, *_dai;
2336 for_each_component_dais_safe(component, dai, _dai)
2337 snd_soc_unregister_dai(dai);
2341 * snd_soc_register_dais - Register a DAI with the ASoC core
2343 * @component: The component the DAIs are registered for
2344 * @dai_drv: DAI driver to use for the DAIs
2345 * @count: Number of DAIs
2347 static int snd_soc_register_dais(struct snd_soc_component *component,
2348 struct snd_soc_dai_driver *dai_drv,
2351 struct snd_soc_dai *dai;
2355 for (i = 0; i < count; i++) {
2356 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2357 !component->driver->non_legacy_dai_naming);
2367 snd_soc_unregister_dais(component);
2372 #define ENDIANNESS_MAP(name) \
2373 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2374 static u64 endianness_format_map[] = {
2375 ENDIANNESS_MAP(S16_),
2376 ENDIANNESS_MAP(U16_),
2377 ENDIANNESS_MAP(S24_),
2378 ENDIANNESS_MAP(U24_),
2379 ENDIANNESS_MAP(S32_),
2380 ENDIANNESS_MAP(U32_),
2381 ENDIANNESS_MAP(S24_3),
2382 ENDIANNESS_MAP(U24_3),
2383 ENDIANNESS_MAP(S20_3),
2384 ENDIANNESS_MAP(U20_3),
2385 ENDIANNESS_MAP(S18_3),
2386 ENDIANNESS_MAP(U18_3),
2387 ENDIANNESS_MAP(FLOAT_),
2388 ENDIANNESS_MAP(FLOAT64_),
2389 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2393 * Fix up the DAI formats for endianness: codecs don't actually see
2394 * the endianness of the data but we're using the CPU format
2395 * definitions which do need to include endianness so we ensure that
2396 * codec DAIs always have both big and little endian variants set.
2398 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2402 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2403 if (stream->formats & endianness_format_map[i])
2404 stream->formats |= endianness_format_map[i];
2407 static void snd_soc_try_rebind_card(void)
2409 struct snd_soc_card *card, *c;
2411 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2412 if (!snd_soc_bind_card(card))
2413 list_del(&card->list);
2416 static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2418 struct snd_soc_card *card = component->card;
2420 snd_soc_unregister_dais(component);
2423 snd_soc_unbind_card(card, false);
2425 list_del(&component->list);
2428 int snd_soc_component_initialize(struct snd_soc_component *component,
2429 const struct snd_soc_component_driver *driver,
2432 INIT_LIST_HEAD(&component->dai_list);
2433 INIT_LIST_HEAD(&component->dobj_list);
2434 INIT_LIST_HEAD(&component->card_list);
2435 mutex_init(&component->io_mutex);
2437 component->name = fmt_single_name(dev, &component->id);
2438 if (!component->name) {
2439 dev_err(dev, "ASoC: Failed to allocate name\n");
2443 component->dev = dev;
2444 component->driver = driver;
2448 EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
2450 int snd_soc_add_component(struct snd_soc_component *component,
2451 struct snd_soc_dai_driver *dai_drv,
2457 mutex_lock(&client_mutex);
2459 if (component->driver->endianness) {
2460 for (i = 0; i < num_dai; i++) {
2461 convert_endianness_formats(&dai_drv[i].playback);
2462 convert_endianness_formats(&dai_drv[i].capture);
2466 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2468 dev_err(component->dev, "ASoC: Failed to register DAIs: %d\n",
2473 if (!component->driver->write && !component->driver->read) {
2474 if (!component->regmap)
2475 component->regmap = dev_get_regmap(component->dev,
2477 if (component->regmap)
2478 snd_soc_component_setup_regmap(component);
2481 /* see for_each_component */
2482 list_add(&component->list, &component_list);
2486 snd_soc_del_component_unlocked(component);
2488 mutex_unlock(&client_mutex);
2491 snd_soc_try_rebind_card();
2495 EXPORT_SYMBOL_GPL(snd_soc_add_component);
2497 int snd_soc_register_component(struct device *dev,
2498 const struct snd_soc_component_driver *component_driver,
2499 struct snd_soc_dai_driver *dai_drv,
2502 struct snd_soc_component *component;
2505 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2509 ret = snd_soc_component_initialize(component, component_driver, dev);
2513 return snd_soc_add_component(component, dai_drv, num_dai);
2515 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2518 * snd_soc_unregister_component_by_driver - Unregister component using a given driver
2519 * from the ASoC core
2521 * @dev: The device to unregister
2522 * @component_driver: The component driver to unregister
2524 void snd_soc_unregister_component_by_driver(struct device *dev,
2525 const struct snd_soc_component_driver *component_driver)
2527 struct snd_soc_component *component;
2529 if (!component_driver)
2532 mutex_lock(&client_mutex);
2533 component = snd_soc_lookup_component_nolocked(dev, component_driver->name);
2537 snd_soc_del_component_unlocked(component);
2540 mutex_unlock(&client_mutex);
2542 EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
2545 * snd_soc_unregister_component - Unregister all related component
2546 * from the ASoC core
2548 * @dev: The device to unregister
2550 void snd_soc_unregister_component(struct device *dev)
2552 struct snd_soc_component *component;
2554 mutex_lock(&client_mutex);
2556 component = snd_soc_lookup_component_nolocked(dev, NULL);
2560 snd_soc_del_component_unlocked(component);
2562 mutex_unlock(&client_mutex);
2564 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2566 /* Retrieve a card's name from device tree */
2567 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2568 const char *propname)
2570 struct device_node *np;
2574 pr_err("card->dev is not set before calling %s\n", __func__);
2578 np = card->dev->of_node;
2580 ret = of_property_read_string_index(np, propname, 0, &card->name);
2582 * EINVAL means the property does not exist. This is fine providing
2583 * card->name was previously set, which is checked later in
2584 * snd_soc_register_card.
2586 if (ret < 0 && ret != -EINVAL) {
2588 "ASoC: Property '%s' could not be read: %d\n",
2595 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2597 static const struct snd_soc_dapm_widget simple_widgets[] = {
2598 SND_SOC_DAPM_MIC("Microphone", NULL),
2599 SND_SOC_DAPM_LINE("Line", NULL),
2600 SND_SOC_DAPM_HP("Headphone", NULL),
2601 SND_SOC_DAPM_SPK("Speaker", NULL),
2604 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2605 const char *propname)
2607 struct device_node *np = card->dev->of_node;
2608 struct snd_soc_dapm_widget *widgets;
2609 const char *template, *wname;
2610 int i, j, num_widgets, ret;
2612 num_widgets = of_property_count_strings(np, propname);
2613 if (num_widgets < 0) {
2615 "ASoC: Property '%s' does not exist\n", propname);
2618 if (num_widgets & 1) {
2620 "ASoC: Property '%s' length is not even\n", propname);
2626 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2631 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2635 "ASoC: Could not allocate memory for widgets\n");
2639 for (i = 0; i < num_widgets; i++) {
2640 ret = of_property_read_string_index(np, propname,
2644 "ASoC: Property '%s' index %d read error:%d\n",
2645 propname, 2 * i, ret);
2649 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
2650 if (!strncmp(template, simple_widgets[j].name,
2651 strlen(simple_widgets[j].name))) {
2652 widgets[i] = simple_widgets[j];
2657 if (j >= ARRAY_SIZE(simple_widgets)) {
2659 "ASoC: DAPM widget '%s' is not supported\n",
2664 ret = of_property_read_string_index(np, propname,
2669 "ASoC: Property '%s' index %d read error:%d\n",
2670 propname, (2 * i) + 1, ret);
2674 widgets[i].name = wname;
2677 card->of_dapm_widgets = widgets;
2678 card->num_of_dapm_widgets = num_widgets;
2682 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
2684 int snd_soc_of_get_slot_mask(struct device_node *np,
2685 const char *prop_name,
2689 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
2695 for (i = 0; i < val; i++)
2696 if (be32_to_cpup(&of_slot_mask[i]))
2701 EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
2703 int snd_soc_of_parse_tdm_slot(struct device_node *np,
2704 unsigned int *tx_mask,
2705 unsigned int *rx_mask,
2706 unsigned int *slots,
2707 unsigned int *slot_width)
2713 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
2715 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
2717 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
2718 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
2726 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
2727 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
2737 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
2739 void snd_soc_of_parse_node_prefix(struct device_node *np,
2740 struct snd_soc_codec_conf *codec_conf,
2741 struct device_node *of_node,
2742 const char *propname)
2747 ret = of_property_read_string(np, propname, &str);
2749 /* no prefix is not error */
2753 codec_conf->dlc.of_node = of_node;
2754 codec_conf->name_prefix = str;
2756 EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
2758 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
2759 const char *propname)
2761 struct device_node *np = card->dev->of_node;
2763 struct snd_soc_dapm_route *routes;
2766 num_routes = of_property_count_strings(np, propname);
2767 if (num_routes < 0 || num_routes & 1) {
2769 "ASoC: Property '%s' does not exist or its length is not even\n",
2775 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2780 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
2784 "ASoC: Could not allocate DAPM route table\n");
2788 for (i = 0; i < num_routes; i++) {
2789 ret = of_property_read_string_index(np, propname,
2790 2 * i, &routes[i].sink);
2793 "ASoC: Property '%s' index %d could not be read: %d\n",
2794 propname, 2 * i, ret);
2797 ret = of_property_read_string_index(np, propname,
2798 (2 * i) + 1, &routes[i].source);
2801 "ASoC: Property '%s' index %d could not be read: %d\n",
2802 propname, (2 * i) + 1, ret);
2807 card->num_of_dapm_routes = num_routes;
2808 card->of_dapm_routes = routes;
2812 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
2814 int snd_soc_of_parse_aux_devs(struct snd_soc_card *card, const char *propname)
2816 struct device_node *node = card->dev->of_node;
2817 struct snd_soc_aux_dev *aux;
2820 num = of_count_phandle_with_args(node, propname, NULL);
2821 if (num == -ENOENT) {
2823 } else if (num < 0) {
2824 dev_err(card->dev, "ASOC: Property '%s' could not be read: %d\n",
2829 aux = devm_kcalloc(card->dev, num, sizeof(*aux), GFP_KERNEL);
2832 card->aux_dev = aux;
2833 card->num_aux_devs = num;
2835 for_each_card_pre_auxs(card, i, aux) {
2836 aux->dlc.of_node = of_parse_phandle(node, propname, i);
2837 if (!aux->dlc.of_node)
2843 EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs);
2845 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
2847 struct device_node **bitclkmaster,
2848 struct device_node **framemaster)
2852 unsigned int format = 0;
2858 } of_fmt_table[] = {
2859 { "i2s", SND_SOC_DAIFMT_I2S },
2860 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
2861 { "left_j", SND_SOC_DAIFMT_LEFT_J },
2862 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
2863 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
2864 { "ac97", SND_SOC_DAIFMT_AC97 },
2865 { "pdm", SND_SOC_DAIFMT_PDM},
2866 { "msb", SND_SOC_DAIFMT_MSB },
2867 { "lsb", SND_SOC_DAIFMT_LSB },
2874 * check "dai-format = xxx"
2875 * or "[prefix]format = xxx"
2876 * SND_SOC_DAIFMT_FORMAT_MASK area
2878 ret = of_property_read_string(np, "dai-format", &str);
2880 snprintf(prop, sizeof(prop), "%sformat", prefix);
2881 ret = of_property_read_string(np, prop, &str);
2884 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
2885 if (strcmp(str, of_fmt_table[i].name) == 0) {
2886 format |= of_fmt_table[i].val;
2893 * check "[prefix]continuous-clock"
2894 * SND_SOC_DAIFMT_CLOCK_MASK area
2896 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
2897 if (of_property_read_bool(np, prop))
2898 format |= SND_SOC_DAIFMT_CONT;
2900 format |= SND_SOC_DAIFMT_GATED;
2903 * check "[prefix]bitclock-inversion"
2904 * check "[prefix]frame-inversion"
2905 * SND_SOC_DAIFMT_INV_MASK area
2907 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
2908 bit = !!of_get_property(np, prop, NULL);
2910 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
2911 frame = !!of_get_property(np, prop, NULL);
2913 switch ((bit << 4) + frame) {
2915 format |= SND_SOC_DAIFMT_IB_IF;
2918 format |= SND_SOC_DAIFMT_IB_NF;
2921 format |= SND_SOC_DAIFMT_NB_IF;
2924 /* SND_SOC_DAIFMT_NB_NF is default */
2929 * check "[prefix]bitclock-master"
2930 * check "[prefix]frame-master"
2931 * SND_SOC_DAIFMT_MASTER_MASK area
2933 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
2934 bit = !!of_get_property(np, prop, NULL);
2935 if (bit && bitclkmaster)
2936 *bitclkmaster = of_parse_phandle(np, prop, 0);
2938 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
2939 frame = !!of_get_property(np, prop, NULL);
2940 if (frame && framemaster)
2941 *framemaster = of_parse_phandle(np, prop, 0);
2943 switch ((bit << 4) + frame) {
2945 format |= SND_SOC_DAIFMT_CBM_CFM;
2948 format |= SND_SOC_DAIFMT_CBM_CFS;
2951 format |= SND_SOC_DAIFMT_CBS_CFM;
2954 format |= SND_SOC_DAIFMT_CBS_CFS;
2960 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
2962 int snd_soc_get_dai_id(struct device_node *ep)
2964 struct snd_soc_component *component;
2965 struct snd_soc_dai_link_component dlc;
2968 dlc.of_node = of_graph_get_port_parent(ep);
2971 * For example HDMI case, HDMI has video/sound port,
2972 * but ALSA SoC needs sound port number only.
2973 * Thus counting HDMI DT port/endpoint doesn't work.
2974 * Then, it should have .of_xlate_dai_id
2977 mutex_lock(&client_mutex);
2978 component = soc_find_component(&dlc);
2980 ret = snd_soc_component_of_xlate_dai_id(component, ep);
2981 mutex_unlock(&client_mutex);
2983 of_node_put(dlc.of_node);
2987 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
2989 int snd_soc_get_dai_name(const struct of_phandle_args *args,
2990 const char **dai_name)
2992 struct snd_soc_component *pos;
2993 struct device_node *component_of_node;
2994 int ret = -EPROBE_DEFER;
2996 mutex_lock(&client_mutex);
2997 for_each_component(pos) {
2998 component_of_node = soc_component_to_node(pos);
3000 if (component_of_node != args->np)
3003 ret = snd_soc_component_of_xlate_dai_name(pos, args, dai_name);
3004 if (ret == -ENOTSUPP) {
3005 struct snd_soc_dai *dai;
3008 switch (args->args_count) {
3010 id = 0; /* same as dai_drv[0] */
3020 if (id < 0 || id >= pos->num_dai) {
3027 /* find target DAI */
3028 for_each_component_dais(pos, dai) {
3034 *dai_name = dai->driver->name;
3036 *dai_name = pos->name;
3039 * if another error than ENOTSUPP is returned go on and
3040 * check if another component is provided with the same
3041 * node. This may happen if a device provides several
3049 mutex_unlock(&client_mutex);
3052 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3054 int snd_soc_of_get_dai_name(struct device_node *of_node,
3055 const char **dai_name)
3057 struct of_phandle_args args;
3060 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3061 "#sound-dai-cells", 0, &args);
3065 ret = snd_soc_get_dai_name(&args, dai_name);
3067 of_node_put(args.np);
3071 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3074 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3075 * @dai_link: DAI link
3077 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3079 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3081 struct snd_soc_dai_link_component *component;
3084 for_each_link_codecs(dai_link, index, component) {
3085 if (!component->of_node)
3087 of_node_put(component->of_node);
3088 component->of_node = NULL;
3091 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3094 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3096 * @of_node: Device node
3097 * @dai_link: DAI link
3099 * Builds an array of CODEC DAI components from the DAI link property
3101 * The array is set in the DAI link and the number of DAIs is set accordingly.
3102 * The device nodes in the array (of_node) must be dereferenced by calling
3103 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3105 * Returns 0 for success
3107 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3108 struct device_node *of_node,
3109 struct snd_soc_dai_link *dai_link)
3111 struct of_phandle_args args;
3112 struct snd_soc_dai_link_component *component;
3114 int index, num_codecs, ret;
3116 /* Count the number of CODECs */
3118 num_codecs = of_count_phandle_with_args(of_node, name,
3119 "#sound-dai-cells");
3120 if (num_codecs <= 0) {
3121 if (num_codecs == -ENOENT)
3122 dev_err(dev, "No 'sound-dai' property\n");
3124 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3127 component = devm_kcalloc(dev,
3128 num_codecs, sizeof(*component),
3132 dai_link->codecs = component;
3133 dai_link->num_codecs = num_codecs;
3135 /* Parse the list */
3136 for_each_link_codecs(dai_link, index, component) {
3137 ret = of_parse_phandle_with_args(of_node, name,
3142 component->of_node = args.np;
3143 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3149 snd_soc_of_put_dai_link_codecs(dai_link);
3150 dai_link->codecs = NULL;
3151 dai_link->num_codecs = 0;
3154 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3156 static int __init snd_soc_init(void)
3158 snd_soc_debugfs_init();
3159 snd_soc_util_init();
3161 return platform_driver_register(&soc_driver);
3163 module_init(snd_soc_init);
3165 static void __exit snd_soc_exit(void)
3167 snd_soc_util_exit();
3168 snd_soc_debugfs_exit();
3170 platform_driver_unregister(&soc_driver);
3172 module_exit(snd_soc_exit);
3174 /* Module information */
3175 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3176 MODULE_DESCRIPTION("ALSA SoC Core");
3177 MODULE_LICENSE("GPL");
3178 MODULE_ALIAS("platform:soc-audio");