1 // SPDX-License-Identifier: GPL-2.0+
3 // soc-core.c -- ALSA SoC Audio Layer
5 // Copyright 2005 Wolfson Microelectronics PLC.
6 // Copyright 2005 Openedhand Ltd.
7 // Copyright (C) 2010 Slimlogic Ltd.
8 // Copyright (C) 2010 Texas Instruments Inc.
10 // Author: Liam Girdwood <lrg@slimlogic.co.uk>
11 // with code, comments and ideas from :-
12 // Richard Purdie <richard@openedhand.com>
15 // o Add hw rules to enforce rates, etc.
16 // o More testing with other codecs/machines.
17 // o Add more codecs and platforms to ensure good API coverage.
18 // o Support TDM on PCM and I2S
20 #include <linux/module.h>
21 #include <linux/moduleparam.h>
22 #include <linux/init.h>
23 #include <linux/delay.h>
25 #include <linux/bitops.h>
26 #include <linux/debugfs.h>
27 #include <linux/platform_device.h>
28 #include <linux/pinctrl/consumer.h>
29 #include <linux/ctype.h>
30 #include <linux/slab.h>
32 #include <linux/of_graph.h>
33 #include <linux/dmi.h>
34 #include <sound/core.h>
35 #include <sound/jack.h>
36 #include <sound/pcm.h>
37 #include <sound/pcm_params.h>
38 #include <sound/soc.h>
39 #include <sound/soc-dpcm.h>
40 #include <sound/soc-topology.h>
41 #include <sound/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 /* powers down audio subsystem for suspend */
524 int snd_soc_suspend(struct device *dev)
526 struct snd_soc_card *card = dev_get_drvdata(dev);
527 struct snd_soc_component *component;
528 struct snd_soc_pcm_runtime *rtd;
529 int playback = SNDRV_PCM_STREAM_PLAYBACK;
532 /* If the card is not initialized yet there is nothing to do */
533 if (!card->instantiated)
537 * Due to the resume being scheduled into a workqueue we could
538 * suspend before that's finished - wait for it to complete.
540 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
542 /* we're going to block userspace touching us until resume completes */
543 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
545 /* mute any active DACs */
546 for_each_card_rtds(card, rtd) {
547 struct snd_soc_dai *dai;
549 if (rtd->dai_link->ignore_suspend)
552 for_each_rtd_dais(rtd, i, dai) {
553 if (snd_soc_dai_stream_active(dai, playback))
554 snd_soc_dai_digital_mute(dai, 1, playback);
558 /* suspend all pcms */
559 for_each_card_rtds(card, rtd) {
560 if (rtd->dai_link->ignore_suspend)
563 snd_pcm_suspend_all(rtd->pcm);
566 snd_soc_card_suspend_pre(card);
568 /* close any waiting streams */
569 snd_soc_flush_all_delayed_work(card);
571 for_each_card_rtds(card, rtd) {
574 if (rtd->dai_link->ignore_suspend)
577 for_each_pcm_streams(stream)
578 snd_soc_dapm_stream_event(rtd, stream,
579 SND_SOC_DAPM_STREAM_SUSPEND);
582 /* Recheck all endpoints too, their state is affected by suspend */
583 dapm_mark_endpoints_dirty(card);
584 snd_soc_dapm_sync(&card->dapm);
586 /* suspend all COMPONENTs */
587 for_each_card_rtds(card, rtd) {
589 if (rtd->dai_link->ignore_suspend)
592 for_each_rtd_components(rtd, i, component) {
593 struct snd_soc_dapm_context *dapm =
594 snd_soc_component_get_dapm(component);
597 * ignore if component was already suspended
599 if (snd_soc_component_is_suspended(component))
603 * If there are paths active then the COMPONENT will be
604 * held with bias _ON and should not be suspended.
606 switch (snd_soc_dapm_get_bias_level(dapm)) {
607 case SND_SOC_BIAS_STANDBY:
609 * If the COMPONENT is capable of idle
610 * bias off then being in STANDBY
611 * means it's doing something,
612 * otherwise fall through.
614 if (dapm->idle_bias_off) {
615 dev_dbg(component->dev,
616 "ASoC: idle_bias_off CODEC on over suspend\n");
621 case SND_SOC_BIAS_OFF:
622 snd_soc_component_suspend(component);
623 if (component->regmap)
624 regcache_mark_dirty(component->regmap);
625 /* deactivate pins to sleep state */
626 pinctrl_pm_select_sleep_state(component->dev);
629 dev_dbg(component->dev,
630 "ASoC: COMPONENT is on over suspend\n");
636 snd_soc_card_suspend_post(card);
640 EXPORT_SYMBOL_GPL(snd_soc_suspend);
643 * deferred resume work, so resume can complete before we finished
644 * setting our codec back up, which can be very slow on I2C
646 static void soc_resume_deferred(struct work_struct *work)
648 struct snd_soc_card *card =
649 container_of(work, struct snd_soc_card,
650 deferred_resume_work);
651 struct snd_soc_pcm_runtime *rtd;
652 struct snd_soc_component *component;
656 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
657 * so userspace apps are blocked from touching us
660 dev_dbg(card->dev, "ASoC: starting resume work\n");
662 /* Bring us up into D2 so that DAPM starts enabling things */
663 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
665 snd_soc_card_resume_pre(card);
667 for_each_card_components(card, component) {
668 if (snd_soc_component_is_suspended(component))
669 snd_soc_component_resume(component);
672 for_each_card_rtds(card, rtd) {
675 if (rtd->dai_link->ignore_suspend)
678 for_each_pcm_streams(stream)
679 snd_soc_dapm_stream_event(rtd, stream,
680 SND_SOC_DAPM_STREAM_RESUME);
683 /* unmute any active DACs */
684 for_each_card_rtds(card, rtd) {
685 struct snd_soc_dai *dai;
686 int playback = SNDRV_PCM_STREAM_PLAYBACK;
688 if (rtd->dai_link->ignore_suspend)
691 for_each_rtd_dais(rtd, i, dai) {
692 if (snd_soc_dai_stream_active(dai, playback))
693 snd_soc_dai_digital_mute(dai, 0, playback);
697 snd_soc_card_resume_post(card);
699 dev_dbg(card->dev, "ASoC: resume work completed\n");
701 /* Recheck all endpoints too, their state is affected by suspend */
702 dapm_mark_endpoints_dirty(card);
703 snd_soc_dapm_sync(&card->dapm);
705 /* userspace can access us now we are back as we were before */
706 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
709 /* powers up audio subsystem after a suspend */
710 int snd_soc_resume(struct device *dev)
712 struct snd_soc_card *card = dev_get_drvdata(dev);
713 struct snd_soc_component *component;
715 /* If the card is not initialized yet there is nothing to do */
716 if (!card->instantiated)
719 /* activate pins from sleep state */
720 for_each_card_components(card, component)
721 if (snd_soc_component_active(component))
722 pinctrl_pm_select_default_state(component->dev);
724 dev_dbg(dev, "ASoC: Scheduling resume work\n");
725 if (!schedule_work(&card->deferred_resume_work))
726 dev_err(dev, "ASoC: resume work item may be lost\n");
730 EXPORT_SYMBOL_GPL(snd_soc_resume);
732 static void soc_resume_init(struct snd_soc_card *card)
734 /* deferred resume work */
735 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
738 #define snd_soc_suspend NULL
739 #define snd_soc_resume NULL
740 static inline void soc_resume_init(struct snd_soc_card *card)
745 static struct device_node
746 *soc_component_to_node(struct snd_soc_component *component)
748 struct device_node *of_node;
750 of_node = component->dev->of_node;
751 if (!of_node && component->dev->parent)
752 of_node = component->dev->parent->of_node;
757 static int snd_soc_is_matching_component(
758 const struct snd_soc_dai_link_component *dlc,
759 struct snd_soc_component *component)
761 struct device_node *component_of_node;
766 component_of_node = soc_component_to_node(component);
768 if (dlc->of_node && component_of_node != dlc->of_node)
770 if (dlc->name && strcmp(component->name, dlc->name))
776 static struct snd_soc_component *soc_find_component(
777 const struct snd_soc_dai_link_component *dlc)
779 struct snd_soc_component *component;
781 lockdep_assert_held(&client_mutex);
786 * It returns *1st* found component, but some driver
787 * has few components by same of_node/name
789 * CPU component and generic DMAEngine component
791 for_each_component(component)
792 if (snd_soc_is_matching_component(dlc, component))
799 * snd_soc_find_dai - Find a registered DAI
801 * @dlc: name of the DAI or the DAI driver and optional component info to match
803 * This function will search all registered components and their DAIs to
804 * find the DAI of the same name. The component's of_node and name
805 * should also match if being specified.
807 * Return: pointer of DAI, or NULL if not found.
809 struct snd_soc_dai *snd_soc_find_dai(
810 const struct snd_soc_dai_link_component *dlc)
812 struct snd_soc_component *component;
813 struct snd_soc_dai *dai;
815 lockdep_assert_held(&client_mutex);
817 /* Find CPU DAI from registered DAIs */
818 for_each_component(component) {
819 if (!snd_soc_is_matching_component(dlc, component))
821 for_each_component_dais(component, dai) {
822 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
823 && (!dai->driver->name
824 || strcmp(dai->driver->name, dlc->dai_name)))
833 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
835 struct snd_soc_dai *snd_soc_find_dai_with_mutex(
836 const struct snd_soc_dai_link_component *dlc)
838 struct snd_soc_dai *dai;
840 mutex_lock(&client_mutex);
841 dai = snd_soc_find_dai(dlc);
842 mutex_unlock(&client_mutex);
846 EXPORT_SYMBOL_GPL(snd_soc_find_dai_with_mutex);
848 static int soc_dai_link_sanity_check(struct snd_soc_card *card,
849 struct snd_soc_dai_link *link)
852 struct snd_soc_dai_link_component *cpu, *codec, *platform;
854 for_each_link_codecs(link, i, codec) {
856 * Codec must be specified by 1 of name or OF node,
857 * not both or neither.
859 if (!!codec->name == !!codec->of_node) {
860 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
865 /* Codec DAI name must be specified */
866 if (!codec->dai_name) {
867 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
873 * Defer card registration if codec component is not added to
876 if (!soc_find_component(codec)) {
878 "ASoC: codec component %s not found for link %s\n",
879 codec->name, link->name);
880 return -EPROBE_DEFER;
884 for_each_link_platforms(link, i, platform) {
886 * Platform may be specified by either name or OF node, but it
887 * can be left unspecified, then no components will be inserted
890 if (!!platform->name == !!platform->of_node) {
892 "ASoC: Neither/both platform name/of_node are set for %s\n",
898 * Defer card registration if platform component is not added to
901 if (!soc_find_component(platform)) {
903 "ASoC: platform component %s not found for link %s\n",
904 platform->name, link->name);
905 return -EPROBE_DEFER;
909 for_each_link_cpus(link, i, cpu) {
911 * CPU device may be specified by either name or OF node, but
912 * can be left unspecified, and will be matched based on DAI
915 if (cpu->name && cpu->of_node) {
917 "ASoC: Neither/both cpu name/of_node are set for %s\n",
923 * Defer card registration if cpu dai component is not added to
926 if ((cpu->of_node || cpu->name) &&
927 !soc_find_component(cpu)) {
929 "ASoC: cpu component %s not found for link %s\n",
930 cpu->name, link->name);
931 return -EPROBE_DEFER;
935 * At least one of CPU DAI name or CPU device name/node must be
938 if (!cpu->dai_name &&
939 !(cpu->name || cpu->of_node)) {
941 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
951 * snd_soc_remove_pcm_runtime - Remove a pcm_runtime from card
952 * @card: The ASoC card to which the pcm_runtime has
953 * @rtd: The pcm_runtime to remove
955 * This function removes a pcm_runtime from the ASoC card.
957 void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
958 struct snd_soc_pcm_runtime *rtd)
960 lockdep_assert_held(&client_mutex);
962 /* release machine specific resources */
963 snd_soc_link_exit(rtd);
966 * Notify the machine driver for extra destruction
968 snd_soc_card_remove_dai_link(card, rtd->dai_link);
970 soc_free_pcm_runtime(rtd);
972 EXPORT_SYMBOL_GPL(snd_soc_remove_pcm_runtime);
975 * snd_soc_add_pcm_runtime - Add a pcm_runtime dynamically via dai_link
976 * @card: The ASoC card to which the pcm_runtime is added
977 * @dai_link: The DAI link to find pcm_runtime
979 * This function adds a pcm_runtime ASoC card by using dai_link.
981 * Note: Topology can use this API to add pcm_runtime when probing the
982 * topology component. And machine drivers can still define static
983 * DAI links in dai_link array.
985 int snd_soc_add_pcm_runtime(struct snd_soc_card *card,
986 struct snd_soc_dai_link *dai_link)
988 struct snd_soc_pcm_runtime *rtd;
989 struct snd_soc_dai_link_component *codec, *platform, *cpu;
990 struct snd_soc_component *component;
993 lockdep_assert_held(&client_mutex);
996 * Notify the machine driver for extra initialization
998 ret = snd_soc_card_add_dai_link(card, dai_link);
1002 if (dai_link->ignore)
1005 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1007 ret = soc_dai_link_sanity_check(card, dai_link);
1011 rtd = soc_new_pcm_runtime(card, dai_link);
1015 for_each_link_cpus(dai_link, i, cpu) {
1016 asoc_rtd_to_cpu(rtd, i) = snd_soc_find_dai(cpu);
1017 if (!asoc_rtd_to_cpu(rtd, i)) {
1018 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1022 snd_soc_rtd_add_component(rtd, asoc_rtd_to_cpu(rtd, i)->component);
1025 /* Find CODEC from registered CODECs */
1026 for_each_link_codecs(dai_link, i, codec) {
1027 asoc_rtd_to_codec(rtd, i) = snd_soc_find_dai(codec);
1028 if (!asoc_rtd_to_codec(rtd, i)) {
1029 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
1034 snd_soc_rtd_add_component(rtd, asoc_rtd_to_codec(rtd, i)->component);
1037 /* Find PLATFORM from registered PLATFORMs */
1038 for_each_link_platforms(dai_link, i, platform) {
1039 for_each_component(component) {
1040 if (!snd_soc_is_matching_component(platform, component))
1043 snd_soc_rtd_add_component(rtd, component);
1050 snd_soc_remove_pcm_runtime(card, rtd);
1051 return -EPROBE_DEFER;
1053 EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtime);
1055 static int soc_init_pcm_runtime(struct snd_soc_card *card,
1056 struct snd_soc_pcm_runtime *rtd)
1058 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1059 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
1060 struct snd_soc_component *component;
1063 /* set default power off timeout */
1064 rtd->pmdown_time = pmdown_time;
1066 /* do machine specific initialization */
1067 ret = snd_soc_link_init(rtd);
1071 if (dai_link->dai_fmt) {
1072 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1077 /* add DPCM sysfs entries */
1078 soc_dpcm_debugfs_add(rtd);
1083 * most drivers will register their PCMs using DAI link ordering but
1084 * topology based drivers can use the DAI link id field to set PCM
1085 * device number and then use rtd + a base offset of the BEs.
1087 for_each_rtd_components(rtd, i, component) {
1088 if (!component->driver->use_dai_pcm_id)
1091 if (rtd->dai_link->no_pcm)
1092 num += component->driver->be_pcm_base;
1094 num = rtd->dai_link->id;
1097 /* create compress_device if possible */
1098 ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1099 if (ret != -ENOTSUPP) {
1101 dev_err(card->dev, "ASoC: can't create compress %s\n",
1102 dai_link->stream_name);
1106 /* create the pcm */
1107 ret = soc_new_pcm(rtd, num);
1109 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1110 dai_link->stream_name, ret);
1114 return snd_soc_pcm_dai_new(rtd);
1117 static void soc_set_name_prefix(struct snd_soc_card *card,
1118 struct snd_soc_component *component)
1120 struct device_node *of_node = soc_component_to_node(component);
1124 for (i = 0; i < card->num_configs; i++) {
1125 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1127 if (snd_soc_is_matching_component(&map->dlc, component)) {
1128 component->name_prefix = map->name_prefix;
1134 * If there is no configuration table or no match in the table,
1135 * check if a prefix is provided in the node
1137 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1141 component->name_prefix = str;
1144 static void soc_remove_component(struct snd_soc_component *component,
1148 if (!component->card)
1152 snd_soc_component_remove(component);
1154 /* For framework level robustness */
1155 snd_soc_component_set_jack(component, NULL, NULL);
1157 list_del_init(&component->card_list);
1158 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1159 soc_cleanup_component_debugfs(component);
1160 component->card = NULL;
1161 snd_soc_component_module_put_when_remove(component);
1164 static int soc_probe_component(struct snd_soc_card *card,
1165 struct snd_soc_component *component)
1167 struct snd_soc_dapm_context *dapm =
1168 snd_soc_component_get_dapm(component);
1169 struct snd_soc_dai *dai;
1173 if (!strcmp(component->name, "snd-soc-dummy"))
1176 if (component->card) {
1177 if (component->card != card) {
1178 dev_err(component->dev,
1179 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1180 card->name, component->card->name);
1186 ret = snd_soc_component_module_get_when_probe(component);
1190 component->card = card;
1191 soc_set_name_prefix(card, component);
1193 soc_init_component_debugfs(component);
1195 snd_soc_dapm_init(dapm, card, component);
1197 ret = snd_soc_dapm_new_controls(dapm,
1198 component->driver->dapm_widgets,
1199 component->driver->num_dapm_widgets);
1202 dev_err(component->dev,
1203 "Failed to create new controls %d\n", ret);
1207 for_each_component_dais(component, dai) {
1208 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1210 dev_err(component->dev,
1211 "Failed to create DAI widgets %d\n", ret);
1216 ret = snd_soc_component_probe(component);
1218 dev_err(component->dev,
1219 "ASoC: failed to probe component %d\n", ret);
1222 WARN(dapm->idle_bias_off &&
1223 dapm->bias_level != SND_SOC_BIAS_OFF,
1224 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1229 * machine specific init
1231 * snd_soc_component_set_aux()
1233 ret = snd_soc_component_init(component);
1237 ret = snd_soc_add_component_controls(component,
1238 component->driver->controls,
1239 component->driver->num_controls);
1243 ret = snd_soc_dapm_add_routes(dapm,
1244 component->driver->dapm_routes,
1245 component->driver->num_dapm_routes);
1247 if (card->disable_route_checks) {
1249 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1253 "%s: snd_soc_dapm_add_routes failed: %d\n",
1259 /* see for_each_card_components */
1260 list_add(&component->card_list, &card->component_dev_list);
1264 soc_remove_component(component, probed);
1269 static void soc_remove_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) {
1276 /* remove all rtd connected DAIs in good order */
1277 snd_soc_pcm_dai_remove(rtd, order);
1282 static int soc_probe_link_dais(struct snd_soc_card *card)
1284 struct snd_soc_pcm_runtime *rtd;
1287 for_each_comp_order(order) {
1288 for_each_card_rtds(card, rtd) {
1291 "ASoC: probe %s dai link %d late %d\n",
1292 card->name, rtd->num, order);
1294 /* probe all rtd connected DAIs in good order */
1295 ret = snd_soc_pcm_dai_probe(rtd, order);
1304 static void soc_remove_link_components(struct snd_soc_card *card)
1306 struct snd_soc_component *component;
1307 struct snd_soc_pcm_runtime *rtd;
1310 for_each_comp_order(order) {
1311 for_each_card_rtds(card, rtd) {
1312 for_each_rtd_components(rtd, i, component) {
1313 if (component->driver->remove_order != order)
1316 soc_remove_component(component, 1);
1322 static int soc_probe_link_components(struct snd_soc_card *card)
1324 struct snd_soc_component *component;
1325 struct snd_soc_pcm_runtime *rtd;
1328 for_each_comp_order(order) {
1329 for_each_card_rtds(card, rtd) {
1330 for_each_rtd_components(rtd, i, component) {
1331 if (component->driver->probe_order != order)
1334 ret = soc_probe_component(card, component);
1344 static void soc_unbind_aux_dev(struct snd_soc_card *card)
1346 struct snd_soc_component *component, *_component;
1348 for_each_card_auxs_safe(card, component, _component) {
1349 /* for snd_soc_component_init() */
1350 snd_soc_component_set_aux(component, NULL);
1351 list_del(&component->card_aux_list);
1355 static int soc_bind_aux_dev(struct snd_soc_card *card)
1357 struct snd_soc_component *component;
1358 struct snd_soc_aux_dev *aux;
1361 for_each_card_pre_auxs(card, i, aux) {
1362 /* codecs, usually analog devices */
1363 component = soc_find_component(&aux->dlc);
1365 return -EPROBE_DEFER;
1367 /* for snd_soc_component_init() */
1368 snd_soc_component_set_aux(component, aux);
1369 /* see for_each_card_auxs */
1370 list_add(&component->card_aux_list, &card->aux_comp_list);
1375 static int soc_probe_aux_devices(struct snd_soc_card *card)
1377 struct snd_soc_component *component;
1381 for_each_comp_order(order) {
1382 for_each_card_auxs(card, component) {
1383 if (component->driver->probe_order != order)
1386 ret = soc_probe_component(card, component);
1395 static void soc_remove_aux_devices(struct snd_soc_card *card)
1397 struct snd_soc_component *comp, *_comp;
1400 for_each_comp_order(order) {
1401 for_each_card_auxs_safe(card, comp, _comp) {
1402 if (comp->driver->remove_order == order)
1403 soc_remove_component(comp, 1);
1409 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1410 * @rtd: The runtime for which the DAI link format should be changed
1411 * @dai_fmt: The new DAI link format
1413 * This function updates the DAI link format for all DAIs connected to the DAI
1414 * link for the specified runtime.
1416 * Note: For setups with a static format set the dai_fmt field in the
1417 * corresponding snd_dai_link struct instead of using this function.
1419 * Returns 0 on success, otherwise a negative error code.
1421 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1422 unsigned int dai_fmt)
1424 struct snd_soc_dai *cpu_dai;
1425 struct snd_soc_dai *codec_dai;
1426 unsigned int inv_dai_fmt;
1430 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1431 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1432 if (ret != 0 && ret != -ENOTSUPP) {
1433 dev_warn(codec_dai->dev,
1434 "ASoC: Failed to set DAI format: %d\n", ret);
1440 * Flip the polarity for the "CPU" end of a CODEC<->CODEC link
1441 * the component which has non_legacy_dai_naming is Codec
1443 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1444 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1445 case SND_SOC_DAIFMT_CBM_CFM:
1446 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1448 case SND_SOC_DAIFMT_CBM_CFS:
1449 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1451 case SND_SOC_DAIFMT_CBS_CFM:
1452 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1454 case SND_SOC_DAIFMT_CBS_CFS:
1455 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1458 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1459 unsigned int fmt = dai_fmt;
1461 if (cpu_dai->component->driver->non_legacy_dai_naming)
1464 ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
1465 if (ret != 0 && ret != -ENOTSUPP) {
1466 dev_warn(cpu_dai->dev,
1467 "ASoC: Failed to set DAI format: %d\n", ret);
1474 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1478 * If a DMI filed contain strings in this blacklist (e.g.
1479 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
1480 * as invalid and dropped when setting the card long name from DMI info.
1482 static const char * const dmi_blacklist[] = {
1483 "To be filled by OEM",
1486 "Board Manufacturer",
1487 "Board Vendor Name",
1488 "Board Product Name",
1489 NULL, /* terminator */
1493 * Trim special characters, and replace '-' with '_' since '-' is used to
1494 * separate different DMI fields in the card long name. Only number and
1495 * alphabet characters and a few separator characters are kept.
1497 static void cleanup_dmi_name(char *name)
1501 for (i = 0; name[i]; i++) {
1502 if (isalnum(name[i]) || (name[i] == '.')
1503 || (name[i] == '_'))
1504 name[j++] = name[i];
1505 else if (name[i] == '-')
1513 * Check if a DMI field is valid, i.e. not containing any string
1514 * in the black list.
1516 static int is_dmi_valid(const char *field)
1520 while (dmi_blacklist[i]) {
1521 if (strstr(field, dmi_blacklist[i]))
1530 * Append a string to card->dmi_longname with character cleanups.
1532 static void append_dmi_string(struct snd_soc_card *card, const char *str)
1534 char *dst = card->dmi_longname;
1535 size_t dst_len = sizeof(card->dmi_longname);
1539 snprintf(dst + len, dst_len - len, "-%s", str);
1541 len++; /* skip the separator "-" */
1543 cleanup_dmi_name(dst + len);
1547 * snd_soc_set_dmi_name() - Register DMI names to card
1548 * @card: The card to register DMI names
1549 * @flavour: The flavour "differentiator" for the card amongst its peers.
1551 * An Intel machine driver may be used by many different devices but are
1552 * difficult for userspace to differentiate, since machine drivers ususally
1553 * use their own name as the card short name and leave the card long name
1554 * blank. To differentiate such devices and fix bugs due to lack of
1555 * device-specific configurations, this function allows DMI info to be used
1556 * as the sound card long name, in the format of
1557 * "vendor-product-version-board"
1558 * (Character '-' is used to separate different DMI fields here).
1559 * This will help the user space to load the device-specific Use Case Manager
1560 * (UCM) configurations for the card.
1562 * Possible card long names may be:
1563 * DellInc.-XPS139343-01-0310JH
1564 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1565 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1567 * This function also supports flavoring the card longname to provide
1568 * the extra differentiation, like "vendor-product-version-board-flavor".
1570 * We only keep number and alphabet characters and a few separator characters
1571 * in the card long name since UCM in the user space uses the card long names
1572 * as card configuration directory names and AudoConf cannot support special
1573 * charactors like SPACE.
1575 * Returns 0 on success, otherwise a negative error code.
1577 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1579 const char *vendor, *product, *product_version, *board;
1581 if (card->long_name)
1582 return 0; /* long name already set by driver or from DMI */
1584 /* make up dmi long name as: vendor-product-version-board */
1585 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1586 if (!vendor || !is_dmi_valid(vendor)) {
1587 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1591 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1592 cleanup_dmi_name(card->dmi_longname);
1594 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1595 if (product && is_dmi_valid(product)) {
1596 append_dmi_string(card, product);
1599 * some vendors like Lenovo may only put a self-explanatory
1600 * name in the product version field
1602 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1603 if (product_version && is_dmi_valid(product_version))
1604 append_dmi_string(card, product_version);
1607 board = dmi_get_system_info(DMI_BOARD_NAME);
1608 if (board && is_dmi_valid(board)) {
1609 if (!product || strcasecmp(board, product))
1610 append_dmi_string(card, board);
1611 } else if (!product) {
1612 /* fall back to using legacy name */
1613 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1617 /* Add flavour to dmi long name */
1619 append_dmi_string(card, flavour);
1621 /* set the card long name */
1622 card->long_name = card->dmi_longname;
1626 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1627 #endif /* CONFIG_DMI */
1629 static void soc_check_tplg_fes(struct snd_soc_card *card)
1631 struct snd_soc_component *component;
1632 const struct snd_soc_component_driver *comp_drv;
1633 struct snd_soc_dai_link *dai_link;
1636 for_each_component(component) {
1638 /* does this component override BEs ? */
1639 if (!component->driver->ignore_machine)
1642 /* for this machine ? */
1643 if (!strcmp(component->driver->ignore_machine,
1644 card->dev->driver->name))
1646 if (strcmp(component->driver->ignore_machine,
1647 dev_name(card->dev)))
1650 /* machine matches, so override the rtd data */
1651 for_each_card_prelinks(card, i, dai_link) {
1653 /* ignore this FE */
1654 if (dai_link->dynamic) {
1655 dai_link->ignore = true;
1659 dev_dbg(card->dev, "info: override BE DAI link %s\n",
1660 card->dai_link[i].name);
1662 /* override platform component */
1663 if (!dai_link->platforms) {
1664 dev_err(card->dev, "init platform error");
1667 dai_link->platforms->name = component->name;
1669 /* convert non BE into BE */
1670 if (!dai_link->no_pcm) {
1671 dai_link->no_pcm = 1;
1673 if (dai_link->dpcm_playback)
1675 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_playback=1\n",
1677 if (dai_link->dpcm_capture)
1679 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_capture=1\n",
1682 /* convert normal link into DPCM one */
1683 if (!(dai_link->dpcm_playback ||
1684 dai_link->dpcm_capture)) {
1685 dai_link->dpcm_playback = !dai_link->capture_only;
1686 dai_link->dpcm_capture = !dai_link->playback_only;
1691 * override any BE fixups
1693 * snd_soc_link_be_hw_params_fixup()
1695 dai_link->be_hw_params_fixup =
1696 component->driver->be_hw_params_fixup;
1699 * most BE links don't set stream name, so set it to
1700 * dai link name if it's NULL to help bind widgets.
1702 if (!dai_link->stream_name)
1703 dai_link->stream_name = dai_link->name;
1706 /* Inform userspace we are using alternate topology */
1707 if (component->driver->topology_name_prefix) {
1709 /* topology shortname created? */
1710 if (!card->topology_shortname_created) {
1711 comp_drv = component->driver;
1713 snprintf(card->topology_shortname, 32, "%s-%s",
1714 comp_drv->topology_name_prefix,
1716 card->topology_shortname_created = true;
1719 /* use topology shortname */
1720 card->name = card->topology_shortname;
1725 #define soc_setup_card_name(name, name1, name2, norm) \
1726 __soc_setup_card_name(name, sizeof(name), name1, name2, norm)
1727 static void __soc_setup_card_name(char *name, int len,
1728 const char *name1, const char *name2,
1733 snprintf(name, len, "%s", name1 ? name1 : name2);
1739 * Name normalization
1741 * The driver name is somewhat special, as it's used as a key for
1742 * searches in the user-space.
1745 * "abcd??efg" -> "abcd__efg"
1747 for (i = 0; i < len; i++) {
1754 if (!isalnum(name[i]))
1761 static void soc_cleanup_card_resources(struct snd_soc_card *card)
1763 struct snd_soc_pcm_runtime *rtd, *n;
1766 snd_card_disconnect_sync(card->snd_card);
1768 snd_soc_dapm_shutdown(card);
1770 /* remove and free each DAI */
1771 soc_remove_link_dais(card);
1772 soc_remove_link_components(card);
1774 for_each_card_rtds_safe(card, rtd, n)
1775 snd_soc_remove_pcm_runtime(card, rtd);
1777 /* remove auxiliary devices */
1778 soc_remove_aux_devices(card);
1779 soc_unbind_aux_dev(card);
1781 snd_soc_dapm_free(&card->dapm);
1782 soc_cleanup_card_debugfs(card);
1784 /* remove the card */
1785 snd_soc_card_remove(card);
1787 if (card->snd_card) {
1788 snd_card_free(card->snd_card);
1789 card->snd_card = NULL;
1793 static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
1795 if (card->instantiated) {
1796 card->instantiated = false;
1797 snd_soc_flush_all_delayed_work(card);
1799 soc_cleanup_card_resources(card);
1801 list_add(&card->list, &unbind_card_list);
1804 list_del(&card->list);
1808 static int snd_soc_bind_card(struct snd_soc_card *card)
1810 struct snd_soc_pcm_runtime *rtd;
1811 struct snd_soc_component *component;
1812 struct snd_soc_dai_link *dai_link;
1815 mutex_lock(&client_mutex);
1816 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1818 snd_soc_dapm_init(&card->dapm, card, NULL);
1820 /* check whether any platform is ignore machine FE and using topology */
1821 soc_check_tplg_fes(card);
1823 /* bind aux_devs too */
1824 ret = soc_bind_aux_dev(card);
1828 /* add predefined DAI links to the list */
1830 for_each_card_prelinks(card, i, dai_link) {
1831 ret = snd_soc_add_pcm_runtime(card, dai_link);
1836 /* card bind complete so register a sound card */
1837 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1838 card->owner, 0, &card->snd_card);
1841 "ASoC: can't create sound card for card %s: %d\n",
1846 soc_init_card_debugfs(card);
1848 soc_resume_init(card);
1850 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1851 card->num_dapm_widgets);
1855 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
1856 card->num_of_dapm_widgets);
1860 /* initialise the sound card only once */
1861 ret = snd_soc_card_probe(card);
1865 /* probe all components used by DAI links on this card */
1866 ret = soc_probe_link_components(card);
1869 "ASoC: failed to instantiate card %d\n", ret);
1873 /* probe auxiliary components */
1874 ret = soc_probe_aux_devices(card);
1877 "ASoC: failed to probe aux component %d\n", ret);
1881 /* probe all DAI links on this card */
1882 ret = soc_probe_link_dais(card);
1885 "ASoC: failed to instantiate card %d\n", ret);
1889 for_each_card_rtds(card, rtd) {
1890 ret = soc_init_pcm_runtime(card, rtd);
1895 snd_soc_dapm_link_dai_widgets(card);
1896 snd_soc_dapm_connect_dai_link_widgets(card);
1898 ret = snd_soc_add_card_controls(card, card->controls,
1899 card->num_controls);
1903 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1904 card->num_dapm_routes);
1906 if (card->disable_route_checks) {
1908 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1912 "%s: snd_soc_dapm_add_routes failed: %d\n",
1918 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
1919 card->num_of_dapm_routes);
1923 /* try to set some sane longname if DMI is available */
1924 snd_soc_set_dmi_name(card, NULL);
1926 soc_setup_card_name(card->snd_card->shortname,
1927 card->name, NULL, 0);
1928 soc_setup_card_name(card->snd_card->longname,
1929 card->long_name, card->name, 0);
1930 soc_setup_card_name(card->snd_card->driver,
1931 card->driver_name, card->name, 1);
1933 if (card->components) {
1934 /* the current implementation of snd_component_add() accepts */
1935 /* multiple components in the string separated by space, */
1936 /* but the string collision (identical string) check might */
1937 /* not work correctly */
1938 ret = snd_component_add(card->snd_card, card->components);
1940 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
1946 ret = snd_soc_card_late_probe(card);
1950 snd_soc_dapm_new_widgets(card);
1952 ret = snd_card_register(card->snd_card);
1954 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1959 card->instantiated = 1;
1960 dapm_mark_endpoints_dirty(card);
1961 snd_soc_dapm_sync(&card->dapm);
1963 /* deactivate pins to sleep state */
1964 for_each_card_components(card, component)
1965 if (!snd_soc_component_active(component))
1966 pinctrl_pm_select_sleep_state(component->dev);
1970 soc_cleanup_card_resources(card);
1972 mutex_unlock(&card->mutex);
1973 mutex_unlock(&client_mutex);
1978 /* probes a new socdev */
1979 static int soc_probe(struct platform_device *pdev)
1981 struct snd_soc_card *card = platform_get_drvdata(pdev);
1984 * no card, so machine driver should be registering card
1985 * we should not be here in that case so ret error
1990 dev_warn(&pdev->dev,
1991 "ASoC: machine %s should use snd_soc_register_card()\n",
1994 /* Bodge while we unpick instantiation */
1995 card->dev = &pdev->dev;
1997 return devm_snd_soc_register_card(&pdev->dev, card);
2000 int snd_soc_poweroff(struct device *dev)
2002 struct snd_soc_card *card = dev_get_drvdata(dev);
2003 struct snd_soc_component *component;
2005 if (!card->instantiated)
2009 * Flush out pmdown_time work - we actually do want to run it
2010 * now, we're shutting down so no imminent restart.
2012 snd_soc_flush_all_delayed_work(card);
2014 snd_soc_dapm_shutdown(card);
2016 /* deactivate pins to sleep state */
2017 for_each_card_components(card, component)
2018 pinctrl_pm_select_sleep_state(component->dev);
2022 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2024 const struct dev_pm_ops snd_soc_pm_ops = {
2025 .suspend = snd_soc_suspend,
2026 .resume = snd_soc_resume,
2027 .freeze = snd_soc_suspend,
2028 .thaw = snd_soc_resume,
2029 .poweroff = snd_soc_poweroff,
2030 .restore = snd_soc_resume,
2032 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2034 /* ASoC platform driver */
2035 static struct platform_driver soc_driver = {
2037 .name = "soc-audio",
2038 .pm = &snd_soc_pm_ops,
2044 * snd_soc_cnew - create new control
2045 * @_template: control template
2046 * @data: control private data
2047 * @long_name: control long name
2048 * @prefix: control name prefix
2050 * Create a new mixer control from a template control.
2052 * Returns 0 for success, else error.
2054 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2055 void *data, const char *long_name,
2058 struct snd_kcontrol_new template;
2059 struct snd_kcontrol *kcontrol;
2062 memcpy(&template, _template, sizeof(template));
2066 long_name = template.name;
2069 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2073 template.name = name;
2075 template.name = long_name;
2078 kcontrol = snd_ctl_new1(&template, data);
2084 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2086 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2087 const struct snd_kcontrol_new *controls, int num_controls,
2088 const char *prefix, void *data)
2092 for (i = 0; i < num_controls; i++) {
2093 const struct snd_kcontrol_new *control = &controls[i];
2095 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2096 control->name, prefix));
2098 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2099 control->name, err);
2108 * snd_soc_add_component_controls - Add an array of controls to a component.
2110 * @component: Component to add controls to
2111 * @controls: Array of controls to add
2112 * @num_controls: Number of elements in the array
2114 * Return: 0 for success, else error.
2116 int snd_soc_add_component_controls(struct snd_soc_component *component,
2117 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2119 struct snd_card *card = component->card->snd_card;
2121 return snd_soc_add_controls(card, component->dev, controls,
2122 num_controls, component->name_prefix, component);
2124 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2127 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2128 * Convenience function to add a list of controls.
2130 * @soc_card: SoC card to add controls to
2131 * @controls: array of controls to add
2132 * @num_controls: number of elements in the array
2134 * Return 0 for success, else error.
2136 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2137 const struct snd_kcontrol_new *controls, int num_controls)
2139 struct snd_card *card = soc_card->snd_card;
2141 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2144 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2147 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2148 * Convienience function to add a list of controls.
2150 * @dai: DAI to add controls to
2151 * @controls: array of controls to add
2152 * @num_controls: number of elements in the array
2154 * Return 0 for success, else error.
2156 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2157 const struct snd_kcontrol_new *controls, int num_controls)
2159 struct snd_card *card = dai->component->card->snd_card;
2161 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2164 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2167 * snd_soc_register_card - Register a card with the ASoC core
2169 * @card: Card to register
2172 int snd_soc_register_card(struct snd_soc_card *card)
2174 if (!card->name || !card->dev)
2177 dev_set_drvdata(card->dev, card);
2179 INIT_LIST_HEAD(&card->widgets);
2180 INIT_LIST_HEAD(&card->paths);
2181 INIT_LIST_HEAD(&card->dapm_list);
2182 INIT_LIST_HEAD(&card->aux_comp_list);
2183 INIT_LIST_HEAD(&card->component_dev_list);
2184 INIT_LIST_HEAD(&card->list);
2185 INIT_LIST_HEAD(&card->rtd_list);
2186 INIT_LIST_HEAD(&card->dapm_dirty);
2187 INIT_LIST_HEAD(&card->dobj_list);
2189 card->instantiated = 0;
2190 mutex_init(&card->mutex);
2191 mutex_init(&card->dapm_mutex);
2192 mutex_init(&card->pcm_mutex);
2193 spin_lock_init(&card->dpcm_lock);
2195 return snd_soc_bind_card(card);
2197 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2200 * snd_soc_unregister_card - Unregister a card with the ASoC core
2202 * @card: Card to unregister
2205 int snd_soc_unregister_card(struct snd_soc_card *card)
2207 mutex_lock(&client_mutex);
2208 snd_soc_unbind_card(card, true);
2209 mutex_unlock(&client_mutex);
2210 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2214 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2217 * Simplify DAI link configuration by removing ".-1" from device names
2218 * and sanitizing names.
2220 static char *fmt_single_name(struct device *dev, int *id)
2222 const char *devname = dev_name(dev);
2226 if (devname == NULL)
2229 name = devm_kstrdup(dev, devname, GFP_KERNEL);
2231 /* are we a "%s.%d" name (platform and SPI components) */
2232 found = strstr(name, dev->driver->name);
2235 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2237 /* discard ID from name if ID == -1 */
2239 found[strlen(dev->driver->name)] = '\0';
2242 /* I2C component devices are named "bus-addr" */
2243 } else if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2245 /* create unique ID number from I2C addr and bus */
2246 *id = ((id1 & 0xffff) << 16) + id2;
2248 devm_kfree(dev, name);
2250 /* sanitize component name for DAI link creation */
2251 name = devm_kasprintf(dev, GFP_KERNEL, "%s.%s", dev->driver->name, devname);
2260 * Simplify DAI link naming for single devices with multiple DAIs by removing
2261 * any ".-1" and using the DAI name (instead of device name).
2263 static inline char *fmt_multiple_name(struct device *dev,
2264 struct snd_soc_dai_driver *dai_drv)
2266 if (dai_drv->name == NULL) {
2268 "ASoC: error - multiple DAI %s registered with no name\n",
2273 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2276 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2278 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2279 list_del(&dai->list);
2281 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2284 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2286 * @component: The component the DAIs are registered for
2287 * @dai_drv: DAI driver to use for the DAI
2288 * @legacy_dai_naming: if %true, use legacy single-name format;
2289 * if %false, use multiple-name format;
2291 * Topology can use this API to register DAIs when probing a component.
2292 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2293 * will be freed in the component cleanup.
2295 struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2296 struct snd_soc_dai_driver *dai_drv,
2297 bool legacy_dai_naming)
2299 struct device *dev = component->dev;
2300 struct snd_soc_dai *dai;
2302 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2304 lockdep_assert_held(&client_mutex);
2306 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2311 * Back in the old days when we still had component-less DAIs,
2312 * instead of having a static name, component-less DAIs would
2313 * inherit the name of the parent device so it is possible to
2314 * register multiple instances of the DAI. We still need to keep
2315 * the same naming style even though those DAIs are not
2316 * component-less anymore.
2318 if (legacy_dai_naming &&
2319 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2320 dai->name = fmt_single_name(dev, &dai->id);
2322 dai->name = fmt_multiple_name(dev, dai_drv);
2324 dai->id = dai_drv->id;
2326 dai->id = component->num_dai;
2331 dai->component = component;
2333 dai->driver = dai_drv;
2335 /* see for_each_component_dais */
2336 list_add_tail(&dai->list, &component->dai_list);
2337 component->num_dai++;
2339 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2344 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2346 * @component: The component for which the DAIs should be unregistered
2348 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2350 struct snd_soc_dai *dai, *_dai;
2352 for_each_component_dais_safe(component, dai, _dai)
2353 snd_soc_unregister_dai(dai);
2357 * snd_soc_register_dais - Register a DAI with the ASoC core
2359 * @component: The component the DAIs are registered for
2360 * @dai_drv: DAI driver to use for the DAIs
2361 * @count: Number of DAIs
2363 static int snd_soc_register_dais(struct snd_soc_component *component,
2364 struct snd_soc_dai_driver *dai_drv,
2367 struct snd_soc_dai *dai;
2371 for (i = 0; i < count; i++) {
2372 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2373 !component->driver->non_legacy_dai_naming);
2383 snd_soc_unregister_dais(component);
2388 #define ENDIANNESS_MAP(name) \
2389 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2390 static u64 endianness_format_map[] = {
2391 ENDIANNESS_MAP(S16_),
2392 ENDIANNESS_MAP(U16_),
2393 ENDIANNESS_MAP(S24_),
2394 ENDIANNESS_MAP(U24_),
2395 ENDIANNESS_MAP(S32_),
2396 ENDIANNESS_MAP(U32_),
2397 ENDIANNESS_MAP(S24_3),
2398 ENDIANNESS_MAP(U24_3),
2399 ENDIANNESS_MAP(S20_3),
2400 ENDIANNESS_MAP(U20_3),
2401 ENDIANNESS_MAP(S18_3),
2402 ENDIANNESS_MAP(U18_3),
2403 ENDIANNESS_MAP(FLOAT_),
2404 ENDIANNESS_MAP(FLOAT64_),
2405 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2409 * Fix up the DAI formats for endianness: codecs don't actually see
2410 * the endianness of the data but we're using the CPU format
2411 * definitions which do need to include endianness so we ensure that
2412 * codec DAIs always have both big and little endian variants set.
2414 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2418 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2419 if (stream->formats & endianness_format_map[i])
2420 stream->formats |= endianness_format_map[i];
2423 static void snd_soc_try_rebind_card(void)
2425 struct snd_soc_card *card, *c;
2427 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2428 if (!snd_soc_bind_card(card))
2429 list_del(&card->list);
2432 static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2434 struct snd_soc_card *card = component->card;
2436 snd_soc_unregister_dais(component);
2439 snd_soc_unbind_card(card, false);
2441 list_del(&component->list);
2444 int snd_soc_component_initialize(struct snd_soc_component *component,
2445 const struct snd_soc_component_driver *driver,
2448 INIT_LIST_HEAD(&component->dai_list);
2449 INIT_LIST_HEAD(&component->dobj_list);
2450 INIT_LIST_HEAD(&component->card_list);
2451 mutex_init(&component->io_mutex);
2453 component->name = fmt_single_name(dev, &component->id);
2454 if (!component->name) {
2455 dev_err(dev, "ASoC: Failed to allocate name\n");
2459 component->dev = dev;
2460 component->driver = driver;
2464 EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
2466 int snd_soc_add_component(struct snd_soc_component *component,
2467 struct snd_soc_dai_driver *dai_drv,
2473 mutex_lock(&client_mutex);
2475 if (component->driver->endianness) {
2476 for (i = 0; i < num_dai; i++) {
2477 convert_endianness_formats(&dai_drv[i].playback);
2478 convert_endianness_formats(&dai_drv[i].capture);
2482 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2484 dev_err(component->dev, "ASoC: Failed to register DAIs: %d\n",
2489 if (!component->driver->write && !component->driver->read) {
2490 if (!component->regmap)
2491 component->regmap = dev_get_regmap(component->dev,
2493 if (component->regmap)
2494 snd_soc_component_setup_regmap(component);
2497 /* see for_each_component */
2498 list_add(&component->list, &component_list);
2502 snd_soc_del_component_unlocked(component);
2504 mutex_unlock(&client_mutex);
2507 snd_soc_try_rebind_card();
2511 EXPORT_SYMBOL_GPL(snd_soc_add_component);
2513 int snd_soc_register_component(struct device *dev,
2514 const struct snd_soc_component_driver *component_driver,
2515 struct snd_soc_dai_driver *dai_drv,
2518 struct snd_soc_component *component;
2521 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2525 ret = snd_soc_component_initialize(component, component_driver, dev);
2529 return snd_soc_add_component(component, dai_drv, num_dai);
2531 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2534 * snd_soc_unregister_component_by_driver - Unregister component using a given driver
2535 * from the ASoC core
2537 * @dev: The device to unregister
2538 * @component_driver: The component driver to unregister
2540 void snd_soc_unregister_component_by_driver(struct device *dev,
2541 const struct snd_soc_component_driver *component_driver)
2543 struct snd_soc_component *component;
2545 if (!component_driver)
2548 mutex_lock(&client_mutex);
2549 component = snd_soc_lookup_component_nolocked(dev, component_driver->name);
2553 snd_soc_del_component_unlocked(component);
2556 mutex_unlock(&client_mutex);
2558 EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
2561 * snd_soc_unregister_component - Unregister all related component
2562 * from the ASoC core
2564 * @dev: The device to unregister
2566 void snd_soc_unregister_component(struct device *dev)
2568 struct snd_soc_component *component;
2570 mutex_lock(&client_mutex);
2572 component = snd_soc_lookup_component_nolocked(dev, NULL);
2576 snd_soc_del_component_unlocked(component);
2578 mutex_unlock(&client_mutex);
2580 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2582 /* Retrieve a card's name from device tree */
2583 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2584 const char *propname)
2586 struct device_node *np;
2590 pr_err("card->dev is not set before calling %s\n", __func__);
2594 np = card->dev->of_node;
2596 ret = of_property_read_string_index(np, propname, 0, &card->name);
2598 * EINVAL means the property does not exist. This is fine providing
2599 * card->name was previously set, which is checked later in
2600 * snd_soc_register_card.
2602 if (ret < 0 && ret != -EINVAL) {
2604 "ASoC: Property '%s' could not be read: %d\n",
2611 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2613 static const struct snd_soc_dapm_widget simple_widgets[] = {
2614 SND_SOC_DAPM_MIC("Microphone", NULL),
2615 SND_SOC_DAPM_LINE("Line", NULL),
2616 SND_SOC_DAPM_HP("Headphone", NULL),
2617 SND_SOC_DAPM_SPK("Speaker", NULL),
2620 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2621 const char *propname)
2623 struct device_node *np = card->dev->of_node;
2624 struct snd_soc_dapm_widget *widgets;
2625 const char *template, *wname;
2626 int i, j, num_widgets, ret;
2628 num_widgets = of_property_count_strings(np, propname);
2629 if (num_widgets < 0) {
2631 "ASoC: Property '%s' does not exist\n", propname);
2634 if (num_widgets & 1) {
2636 "ASoC: Property '%s' length is not even\n", propname);
2642 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2647 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2651 "ASoC: Could not allocate memory for widgets\n");
2655 for (i = 0; i < num_widgets; i++) {
2656 ret = of_property_read_string_index(np, propname,
2660 "ASoC: Property '%s' index %d read error:%d\n",
2661 propname, 2 * i, ret);
2665 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
2666 if (!strncmp(template, simple_widgets[j].name,
2667 strlen(simple_widgets[j].name))) {
2668 widgets[i] = simple_widgets[j];
2673 if (j >= ARRAY_SIZE(simple_widgets)) {
2675 "ASoC: DAPM widget '%s' is not supported\n",
2680 ret = of_property_read_string_index(np, propname,
2685 "ASoC: Property '%s' index %d read error:%d\n",
2686 propname, (2 * i) + 1, ret);
2690 widgets[i].name = wname;
2693 card->of_dapm_widgets = widgets;
2694 card->num_of_dapm_widgets = num_widgets;
2698 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
2700 int snd_soc_of_get_slot_mask(struct device_node *np,
2701 const char *prop_name,
2705 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
2711 for (i = 0; i < val; i++)
2712 if (be32_to_cpup(&of_slot_mask[i]))
2717 EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
2719 int snd_soc_of_parse_tdm_slot(struct device_node *np,
2720 unsigned int *tx_mask,
2721 unsigned int *rx_mask,
2722 unsigned int *slots,
2723 unsigned int *slot_width)
2729 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
2731 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
2733 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
2734 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
2742 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
2743 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
2753 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
2755 void snd_soc_of_parse_node_prefix(struct device_node *np,
2756 struct snd_soc_codec_conf *codec_conf,
2757 struct device_node *of_node,
2758 const char *propname)
2763 ret = of_property_read_string(np, propname, &str);
2765 /* no prefix is not error */
2769 codec_conf->dlc.of_node = of_node;
2770 codec_conf->name_prefix = str;
2772 EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
2774 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
2775 const char *propname)
2777 struct device_node *np = card->dev->of_node;
2779 struct snd_soc_dapm_route *routes;
2782 num_routes = of_property_count_strings(np, propname);
2783 if (num_routes < 0 || num_routes & 1) {
2785 "ASoC: Property '%s' does not exist or its length is not even\n",
2791 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2796 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
2800 "ASoC: Could not allocate DAPM route table\n");
2804 for (i = 0; i < num_routes; i++) {
2805 ret = of_property_read_string_index(np, propname,
2806 2 * i, &routes[i].sink);
2809 "ASoC: Property '%s' index %d could not be read: %d\n",
2810 propname, 2 * i, ret);
2813 ret = of_property_read_string_index(np, propname,
2814 (2 * i) + 1, &routes[i].source);
2817 "ASoC: Property '%s' index %d could not be read: %d\n",
2818 propname, (2 * i) + 1, ret);
2823 card->num_of_dapm_routes = num_routes;
2824 card->of_dapm_routes = routes;
2828 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
2830 int snd_soc_of_parse_aux_devs(struct snd_soc_card *card, const char *propname)
2832 struct device_node *node = card->dev->of_node;
2833 struct snd_soc_aux_dev *aux;
2836 num = of_count_phandle_with_args(node, propname, NULL);
2837 if (num == -ENOENT) {
2839 } else if (num < 0) {
2840 dev_err(card->dev, "ASOC: Property '%s' could not be read: %d\n",
2845 aux = devm_kcalloc(card->dev, num, sizeof(*aux), GFP_KERNEL);
2848 card->aux_dev = aux;
2849 card->num_aux_devs = num;
2851 for_each_card_pre_auxs(card, i, aux) {
2852 aux->dlc.of_node = of_parse_phandle(node, propname, i);
2853 if (!aux->dlc.of_node)
2859 EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs);
2861 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
2863 struct device_node **bitclkmaster,
2864 struct device_node **framemaster)
2868 unsigned int format = 0;
2874 } of_fmt_table[] = {
2875 { "i2s", SND_SOC_DAIFMT_I2S },
2876 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
2877 { "left_j", SND_SOC_DAIFMT_LEFT_J },
2878 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
2879 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
2880 { "ac97", SND_SOC_DAIFMT_AC97 },
2881 { "pdm", SND_SOC_DAIFMT_PDM},
2882 { "msb", SND_SOC_DAIFMT_MSB },
2883 { "lsb", SND_SOC_DAIFMT_LSB },
2890 * check "dai-format = xxx"
2891 * or "[prefix]format = xxx"
2892 * SND_SOC_DAIFMT_FORMAT_MASK area
2894 ret = of_property_read_string(np, "dai-format", &str);
2896 snprintf(prop, sizeof(prop), "%sformat", prefix);
2897 ret = of_property_read_string(np, prop, &str);
2900 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
2901 if (strcmp(str, of_fmt_table[i].name) == 0) {
2902 format |= of_fmt_table[i].val;
2909 * check "[prefix]continuous-clock"
2910 * SND_SOC_DAIFMT_CLOCK_MASK area
2912 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
2913 if (of_property_read_bool(np, prop))
2914 format |= SND_SOC_DAIFMT_CONT;
2916 format |= SND_SOC_DAIFMT_GATED;
2919 * check "[prefix]bitclock-inversion"
2920 * check "[prefix]frame-inversion"
2921 * SND_SOC_DAIFMT_INV_MASK area
2923 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
2924 bit = !!of_get_property(np, prop, NULL);
2926 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
2927 frame = !!of_get_property(np, prop, NULL);
2929 switch ((bit << 4) + frame) {
2931 format |= SND_SOC_DAIFMT_IB_IF;
2934 format |= SND_SOC_DAIFMT_IB_NF;
2937 format |= SND_SOC_DAIFMT_NB_IF;
2940 /* SND_SOC_DAIFMT_NB_NF is default */
2945 * check "[prefix]bitclock-master"
2946 * check "[prefix]frame-master"
2947 * SND_SOC_DAIFMT_MASTER_MASK area
2949 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
2950 bit = !!of_get_property(np, prop, NULL);
2951 if (bit && bitclkmaster)
2952 *bitclkmaster = of_parse_phandle(np, prop, 0);
2954 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
2955 frame = !!of_get_property(np, prop, NULL);
2956 if (frame && framemaster)
2957 *framemaster = of_parse_phandle(np, prop, 0);
2959 switch ((bit << 4) + frame) {
2961 format |= SND_SOC_DAIFMT_CBM_CFM;
2964 format |= SND_SOC_DAIFMT_CBM_CFS;
2967 format |= SND_SOC_DAIFMT_CBS_CFM;
2970 format |= SND_SOC_DAIFMT_CBS_CFS;
2976 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
2978 int snd_soc_get_dai_id(struct device_node *ep)
2980 struct snd_soc_component *component;
2981 struct snd_soc_dai_link_component dlc;
2984 dlc.of_node = of_graph_get_port_parent(ep);
2987 * For example HDMI case, HDMI has video/sound port,
2988 * but ALSA SoC needs sound port number only.
2989 * Thus counting HDMI DT port/endpoint doesn't work.
2990 * Then, it should have .of_xlate_dai_id
2993 mutex_lock(&client_mutex);
2994 component = soc_find_component(&dlc);
2996 ret = snd_soc_component_of_xlate_dai_id(component, ep);
2997 mutex_unlock(&client_mutex);
2999 of_node_put(dlc.of_node);
3003 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3005 int snd_soc_get_dai_name(struct of_phandle_args *args,
3006 const char **dai_name)
3008 struct snd_soc_component *pos;
3009 struct device_node *component_of_node;
3010 int ret = -EPROBE_DEFER;
3012 mutex_lock(&client_mutex);
3013 for_each_component(pos) {
3014 component_of_node = soc_component_to_node(pos);
3016 if (component_of_node != args->np)
3019 ret = snd_soc_component_of_xlate_dai_name(pos, args, dai_name);
3020 if (ret == -ENOTSUPP) {
3021 struct snd_soc_dai *dai;
3024 switch (args->args_count) {
3026 id = 0; /* same as dai_drv[0] */
3036 if (id < 0 || id >= pos->num_dai) {
3043 /* find target DAI */
3044 for_each_component_dais(pos, dai) {
3050 *dai_name = dai->driver->name;
3052 *dai_name = pos->name;
3055 * if another error than ENOTSUPP is returned go on and
3056 * check if another component is provided with the same
3057 * node. This may happen if a device provides several
3065 mutex_unlock(&client_mutex);
3068 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3070 int snd_soc_of_get_dai_name(struct device_node *of_node,
3071 const char **dai_name)
3073 struct of_phandle_args args;
3076 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3077 "#sound-dai-cells", 0, &args);
3081 ret = snd_soc_get_dai_name(&args, dai_name);
3083 of_node_put(args.np);
3087 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3090 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3091 * @dai_link: DAI link
3093 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3095 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3097 struct snd_soc_dai_link_component *component;
3100 for_each_link_codecs(dai_link, index, component) {
3101 if (!component->of_node)
3103 of_node_put(component->of_node);
3104 component->of_node = NULL;
3107 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3110 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3112 * @of_node: Device node
3113 * @dai_link: DAI link
3115 * Builds an array of CODEC DAI components from the DAI link property
3117 * The array is set in the DAI link and the number of DAIs is set accordingly.
3118 * The device nodes in the array (of_node) must be dereferenced by calling
3119 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3121 * Returns 0 for success
3123 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3124 struct device_node *of_node,
3125 struct snd_soc_dai_link *dai_link)
3127 struct of_phandle_args args;
3128 struct snd_soc_dai_link_component *component;
3130 int index, num_codecs, ret;
3132 /* Count the number of CODECs */
3134 num_codecs = of_count_phandle_with_args(of_node, name,
3135 "#sound-dai-cells");
3136 if (num_codecs <= 0) {
3137 if (num_codecs == -ENOENT)
3138 dev_err(dev, "No 'sound-dai' property\n");
3140 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3143 component = devm_kcalloc(dev,
3144 num_codecs, sizeof(*component),
3148 dai_link->codecs = component;
3149 dai_link->num_codecs = num_codecs;
3151 /* Parse the list */
3152 for_each_link_codecs(dai_link, index, component) {
3153 ret = of_parse_phandle_with_args(of_node, name,
3158 component->of_node = args.np;
3159 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3165 snd_soc_of_put_dai_link_codecs(dai_link);
3166 dai_link->codecs = NULL;
3167 dai_link->num_codecs = 0;
3170 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3172 static int __init snd_soc_init(void)
3174 snd_soc_debugfs_init();
3175 snd_soc_util_init();
3177 return platform_driver_register(&soc_driver);
3179 module_init(snd_soc_init);
3181 static void __exit snd_soc_exit(void)
3183 snd_soc_util_exit();
3184 snd_soc_debugfs_exit();
3186 platform_driver_unregister(&soc_driver);
3188 module_exit(snd_soc_exit);
3190 /* Module information */
3191 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3192 MODULE_DESCRIPTION("ALSA SoC Core");
3193 MODULE_LICENSE("GPL");
3194 MODULE_ALIAS("platform:soc-audio");