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 sysfs_emit(buf, "%ld\n", rtd->pmdown_time);
78 static ssize_t pmdown_time_store(struct device *dev,
79 struct device_attribute *attr,
80 const char *buf, size_t count)
82 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
85 ret = kstrtol(buf, 10, &rtd->pmdown_time);
92 static DEVICE_ATTR_RW(pmdown_time);
94 static struct attribute *soc_dev_attrs[] = {
95 &dev_attr_pmdown_time.attr,
99 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
100 struct attribute *attr, int idx)
102 struct device *dev = kobj_to_dev(kobj);
103 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
108 if (attr == &dev_attr_pmdown_time.attr)
109 return attr->mode; /* always visible */
110 return rtd->dai_link->num_codecs ? attr->mode : 0; /* enabled only with codec */
113 static const struct attribute_group soc_dapm_dev_group = {
114 .attrs = soc_dapm_dev_attrs,
115 .is_visible = soc_dev_attr_is_visible,
118 static const struct attribute_group soc_dev_group = {
119 .attrs = soc_dev_attrs,
120 .is_visible = soc_dev_attr_is_visible,
123 static const struct attribute_group *soc_dev_attr_groups[] = {
129 #ifdef CONFIG_DEBUG_FS
130 struct dentry *snd_soc_debugfs_root;
131 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
133 static void soc_init_component_debugfs(struct snd_soc_component *component)
135 if (!component->card->debugfs_card_root)
138 if (component->debugfs_prefix) {
141 name = kasprintf(GFP_KERNEL, "%s:%s",
142 component->debugfs_prefix, component->name);
144 component->debugfs_root = debugfs_create_dir(name,
145 component->card->debugfs_card_root);
149 component->debugfs_root = debugfs_create_dir(component->name,
150 component->card->debugfs_card_root);
153 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
154 component->debugfs_root);
157 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
159 if (!component->debugfs_root)
161 debugfs_remove_recursive(component->debugfs_root);
162 component->debugfs_root = NULL;
165 static int dai_list_show(struct seq_file *m, void *v)
167 struct snd_soc_component *component;
168 struct snd_soc_dai *dai;
170 mutex_lock(&client_mutex);
172 for_each_component(component)
173 for_each_component_dais(component, dai)
174 seq_printf(m, "%s\n", dai->name);
176 mutex_unlock(&client_mutex);
180 DEFINE_SHOW_ATTRIBUTE(dai_list);
182 static int component_list_show(struct seq_file *m, void *v)
184 struct snd_soc_component *component;
186 mutex_lock(&client_mutex);
188 for_each_component(component)
189 seq_printf(m, "%s\n", component->name);
191 mutex_unlock(&client_mutex);
195 DEFINE_SHOW_ATTRIBUTE(component_list);
197 static void soc_init_card_debugfs(struct snd_soc_card *card)
199 card->debugfs_card_root = debugfs_create_dir(card->name,
200 snd_soc_debugfs_root);
202 debugfs_create_u32("dapm_pop_time", 0644, card->debugfs_card_root,
205 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
208 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
210 debugfs_remove_recursive(card->debugfs_card_root);
211 card->debugfs_card_root = NULL;
214 static void snd_soc_debugfs_init(void)
216 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
218 debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
221 debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
222 &component_list_fops);
225 static void snd_soc_debugfs_exit(void)
227 debugfs_remove_recursive(snd_soc_debugfs_root);
232 static inline void soc_init_component_debugfs(struct snd_soc_component *component) { }
233 static inline void soc_cleanup_component_debugfs(struct snd_soc_component *component) { }
234 static inline void soc_init_card_debugfs(struct snd_soc_card *card) { }
235 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card) { }
236 static inline void snd_soc_debugfs_init(void) { }
237 static inline void snd_soc_debugfs_exit(void) { }
241 static int snd_soc_is_match_dai_args(const struct of_phandle_args *args1,
242 const struct of_phandle_args *args2)
244 if (!args1 || !args2)
247 if (args1->np != args2->np)
250 for (int i = 0; i < args1->args_count; i++)
251 if (args1->args[i] != args2->args[i])
257 static inline int snd_soc_dlc_component_is_empty(struct snd_soc_dai_link_component *dlc)
259 return !(dlc->dai_args || dlc->name || dlc->of_node);
262 static inline int snd_soc_dlc_component_is_invalid(struct snd_soc_dai_link_component *dlc)
264 return (dlc->name && dlc->of_node);
267 static inline int snd_soc_dlc_dai_is_empty(struct snd_soc_dai_link_component *dlc)
269 return !(dlc->dai_args || dlc->dai_name);
272 static int snd_soc_is_matching_dai(const struct snd_soc_dai_link_component *dlc,
273 struct snd_soc_dai *dai)
279 return snd_soc_is_match_dai_args(dai->driver->dai_args, dlc->dai_args);
284 /* see snd_soc_dai_name_get() */
286 if (dai->driver->name &&
287 strcmp(dlc->dai_name, dai->driver->name) == 0)
290 if (strcmp(dlc->dai_name, dai->name) == 0)
293 if (dai->component->name &&
294 strcmp(dlc->dai_name, dai->component->name) == 0)
300 const char *snd_soc_dai_name_get(struct snd_soc_dai *dai)
302 /* see snd_soc_is_matching_dai() */
303 if (dai->driver->name)
304 return dai->driver->name;
309 if (dai->component->name)
310 return dai->component->name;
314 EXPORT_SYMBOL_GPL(snd_soc_dai_name_get);
316 static int snd_soc_rtd_add_component(struct snd_soc_pcm_runtime *rtd,
317 struct snd_soc_component *component)
319 struct snd_soc_component *comp;
322 for_each_rtd_components(rtd, i, comp) {
323 /* already connected */
324 if (comp == component)
328 /* see for_each_rtd_components */
329 rtd->components[rtd->num_components] = component;
330 rtd->num_components++;
335 struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
336 const char *driver_name)
338 struct snd_soc_component *component;
347 * snd_soc_rtdcom_lookup() will find component from rtd by using
348 * specified driver name.
349 * But, if many components which have same driver name are connected
350 * to 1 rtd, this function will return 1st found component.
352 for_each_rtd_components(rtd, i, component) {
353 const char *component_name = component->driver->name;
358 if ((component_name == driver_name) ||
359 strcmp(component_name, driver_name) == 0)
365 EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
367 struct snd_soc_component
368 *snd_soc_lookup_component_nolocked(struct device *dev, const char *driver_name)
370 struct snd_soc_component *component;
371 struct snd_soc_component *found_component;
373 found_component = NULL;
374 for_each_component(component) {
375 if ((dev == component->dev) &&
377 (driver_name == component->driver->name) ||
378 (strcmp(component->driver->name, driver_name) == 0))) {
379 found_component = component;
384 return found_component;
386 EXPORT_SYMBOL_GPL(snd_soc_lookup_component_nolocked);
388 struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
389 const char *driver_name)
391 struct snd_soc_component *component;
393 mutex_lock(&client_mutex);
394 component = snd_soc_lookup_component_nolocked(dev, driver_name);
395 mutex_unlock(&client_mutex);
399 EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
401 struct snd_soc_pcm_runtime
402 *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
403 struct snd_soc_dai_link *dai_link)
405 struct snd_soc_pcm_runtime *rtd;
407 for_each_card_rtds(card, rtd) {
408 if (rtd->dai_link == dai_link)
411 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link->name);
414 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
417 * Power down the audio subsystem pmdown_time msecs after close is called.
418 * This is to ensure there are no pops or clicks in between any music tracks
419 * due to DAPM power cycling.
421 void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
423 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
424 int playback = SNDRV_PCM_STREAM_PLAYBACK;
426 snd_soc_dpcm_mutex_lock(rtd);
429 "ASoC: pop wq checking: %s status: %s waiting: %s\n",
430 codec_dai->driver->playback.stream_name,
431 snd_soc_dai_stream_active(codec_dai, playback) ?
432 "active" : "inactive",
433 rtd->pop_wait ? "yes" : "no");
435 /* are we waiting on this codec DAI stream */
436 if (rtd->pop_wait == 1) {
438 snd_soc_dapm_stream_event(rtd, playback,
439 SND_SOC_DAPM_STREAM_STOP);
442 snd_soc_dpcm_mutex_unlock(rtd);
444 EXPORT_SYMBOL_GPL(snd_soc_close_delayed_work);
446 static void soc_release_rtd_dev(struct device *dev)
448 /* "dev" means "rtd->dev" */
452 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
457 list_del(&rtd->list);
459 if (delayed_work_pending(&rtd->delayed_work))
460 flush_delayed_work(&rtd->delayed_work);
461 snd_soc_pcm_component_free(rtd);
464 * we don't need to call kfree() for rtd->dev
466 * soc_release_rtd_dev()
468 * We don't need rtd->dev NULL check, because
469 * it is alloced *before* rtd.
471 * soc_new_pcm_runtime()
473 * We don't need to mind freeing for rtd,
474 * because it was created from dev (= rtd->dev)
476 * soc_new_pcm_runtime()
478 * rtd = devm_kzalloc(dev, ...);
481 device_unregister(rtd->dev);
484 static void close_delayed_work(struct work_struct *work) {
485 struct snd_soc_pcm_runtime *rtd =
486 container_of(work, struct snd_soc_pcm_runtime,
489 if (rtd->close_delayed_work_func)
490 rtd->close_delayed_work_func(rtd);
493 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
494 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
496 struct snd_soc_pcm_runtime *rtd;
497 struct snd_soc_component *component;
505 dev = kzalloc(sizeof(struct device), GFP_KERNEL);
509 dev->parent = card->dev;
510 dev->release = soc_release_rtd_dev;
512 dev_set_name(dev, "%s", dai_link->name);
514 ret = device_register(dev);
516 put_device(dev); /* soc_release_rtd_dev */
523 rtd = devm_kzalloc(dev,
525 sizeof(component) * (dai_link->num_cpus +
526 dai_link->num_codecs +
527 dai_link->num_platforms),
530 device_unregister(dev);
535 INIT_LIST_HEAD(&rtd->list);
536 for_each_pcm_streams(stream) {
537 INIT_LIST_HEAD(&rtd->dpcm[stream].be_clients);
538 INIT_LIST_HEAD(&rtd->dpcm[stream].fe_clients);
540 dev_set_drvdata(dev, rtd);
541 INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
546 rtd->dais = devm_kcalloc(dev, dai_link->num_cpus + dai_link->num_codecs,
547 sizeof(struct snd_soc_dai *),
553 * dais = [][][][][][][][][][][][][][][][][][]
554 * ^cpu_dais ^codec_dais
555 * |--- num_cpus ---|--- num_codecs --|
557 * snd_soc_rtd_to_cpu()
558 * snd_soc_rtd_to_codec()
561 rtd->dai_link = dai_link;
562 rtd->num = card->num_rtd++;
563 rtd->pmdown_time = pmdown_time; /* default power off timeout */
565 /* see for_each_card_rtds */
566 list_add_tail(&rtd->list, &card->rtd_list);
568 ret = device_add_groups(dev, soc_dev_attr_groups);
575 soc_free_pcm_runtime(rtd);
579 static void snd_soc_fill_dummy_dai(struct snd_soc_card *card)
581 struct snd_soc_dai_link *dai_link;
585 * COMP_DUMMY() creates size 0 array on dai_link.
586 * Fill it as dummy DAI in case of CPU/Codec here.
587 * Do nothing for Platform.
589 for_each_card_prelinks(card, i, dai_link) {
590 if (dai_link->num_cpus == 0 && dai_link->cpus) {
591 dai_link->num_cpus = 1;
592 dai_link->cpus = &snd_soc_dummy_dlc;
594 if (dai_link->num_codecs == 0 && dai_link->codecs) {
595 dai_link->num_codecs = 1;
596 dai_link->codecs = &snd_soc_dummy_dlc;
601 static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
603 struct snd_soc_pcm_runtime *rtd;
605 for_each_card_rtds(card, rtd)
606 flush_delayed_work(&rtd->delayed_work);
609 #ifdef CONFIG_PM_SLEEP
610 static void soc_playback_digital_mute(struct snd_soc_card *card, int mute)
612 struct snd_soc_pcm_runtime *rtd;
613 struct snd_soc_dai *dai;
614 int playback = SNDRV_PCM_STREAM_PLAYBACK;
617 for_each_card_rtds(card, rtd) {
619 if (rtd->dai_link->ignore_suspend)
622 for_each_rtd_dais(rtd, i, dai) {
623 if (snd_soc_dai_stream_active(dai, playback))
624 snd_soc_dai_digital_mute(dai, mute, playback);
629 static void soc_dapm_suspend_resume(struct snd_soc_card *card, int event)
631 struct snd_soc_pcm_runtime *rtd;
634 for_each_card_rtds(card, rtd) {
636 if (rtd->dai_link->ignore_suspend)
639 for_each_pcm_streams(stream)
640 snd_soc_dapm_stream_event(rtd, stream, event);
644 /* powers down audio subsystem for suspend */
645 int snd_soc_suspend(struct device *dev)
647 struct snd_soc_card *card = dev_get_drvdata(dev);
648 struct snd_soc_component *component;
649 struct snd_soc_pcm_runtime *rtd;
652 /* If the card is not initialized yet there is nothing to do */
653 if (!snd_soc_card_is_instantiated(card))
657 * Due to the resume being scheduled into a workqueue we could
658 * suspend before that's finished - wait for it to complete.
660 snd_power_wait(card->snd_card);
662 /* we're going to block userspace touching us until resume completes */
663 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
665 /* mute any active DACs */
666 soc_playback_digital_mute(card, 1);
668 /* suspend all pcms */
669 for_each_card_rtds(card, rtd) {
670 if (rtd->dai_link->ignore_suspend)
673 snd_pcm_suspend_all(rtd->pcm);
676 snd_soc_card_suspend_pre(card);
678 /* close any waiting streams */
679 snd_soc_flush_all_delayed_work(card);
681 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_SUSPEND);
683 /* Recheck all endpoints too, their state is affected by suspend */
684 dapm_mark_endpoints_dirty(card);
685 snd_soc_dapm_sync(&card->dapm);
687 /* suspend all COMPONENTs */
688 for_each_card_rtds(card, rtd) {
690 if (rtd->dai_link->ignore_suspend)
693 for_each_rtd_components(rtd, i, component) {
694 struct snd_soc_dapm_context *dapm =
695 snd_soc_component_get_dapm(component);
698 * ignore if component was already suspended
700 if (snd_soc_component_is_suspended(component))
704 * If there are paths active then the COMPONENT will be
705 * held with bias _ON and should not be suspended.
707 switch (snd_soc_dapm_get_bias_level(dapm)) {
708 case SND_SOC_BIAS_STANDBY:
710 * If the COMPONENT is capable of idle
711 * bias off then being in STANDBY
712 * means it's doing something,
713 * otherwise fall through.
715 if (dapm->idle_bias_off) {
716 dev_dbg(component->dev,
717 "ASoC: idle_bias_off CODEC on over suspend\n");
722 case SND_SOC_BIAS_OFF:
723 snd_soc_component_suspend(component);
724 if (component->regmap)
725 regcache_mark_dirty(component->regmap);
726 /* deactivate pins to sleep state */
727 pinctrl_pm_select_sleep_state(component->dev);
730 dev_dbg(component->dev,
731 "ASoC: COMPONENT is on over suspend\n");
737 snd_soc_card_suspend_post(card);
741 EXPORT_SYMBOL_GPL(snd_soc_suspend);
744 * deferred resume work, so resume can complete before we finished
745 * setting our codec back up, which can be very slow on I2C
747 static void soc_resume_deferred(struct work_struct *work)
749 struct snd_soc_card *card =
750 container_of(work, struct snd_soc_card,
751 deferred_resume_work);
752 struct snd_soc_component *component;
755 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
756 * so userspace apps are blocked from touching us
759 dev_dbg(card->dev, "ASoC: starting resume work\n");
761 /* Bring us up into D2 so that DAPM starts enabling things */
762 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
764 snd_soc_card_resume_pre(card);
766 for_each_card_components(card, component) {
767 if (snd_soc_component_is_suspended(component))
768 snd_soc_component_resume(component);
771 soc_dapm_suspend_resume(card, SND_SOC_DAPM_STREAM_RESUME);
773 /* unmute any active DACs */
774 soc_playback_digital_mute(card, 0);
776 snd_soc_card_resume_post(card);
778 dev_dbg(card->dev, "ASoC: resume work completed\n");
780 /* Recheck all endpoints too, their state is affected by suspend */
781 dapm_mark_endpoints_dirty(card);
782 snd_soc_dapm_sync(&card->dapm);
784 /* userspace can access us now we are back as we were before */
785 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
788 /* powers up audio subsystem after a suspend */
789 int snd_soc_resume(struct device *dev)
791 struct snd_soc_card *card = dev_get_drvdata(dev);
792 struct snd_soc_component *component;
794 /* If the card is not initialized yet there is nothing to do */
795 if (!snd_soc_card_is_instantiated(card))
798 /* activate pins from sleep state */
799 for_each_card_components(card, component)
800 if (snd_soc_component_active(component))
801 pinctrl_pm_select_default_state(component->dev);
803 dev_dbg(dev, "ASoC: Scheduling resume work\n");
804 if (!schedule_work(&card->deferred_resume_work))
805 dev_err(dev, "ASoC: resume work item may be lost\n");
809 EXPORT_SYMBOL_GPL(snd_soc_resume);
811 static void soc_resume_init(struct snd_soc_card *card)
813 /* deferred resume work */
814 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
817 #define snd_soc_suspend NULL
818 #define snd_soc_resume NULL
819 static inline void soc_resume_init(struct snd_soc_card *card) { }
822 static struct device_node
823 *soc_component_to_node(struct snd_soc_component *component)
825 struct device_node *of_node;
827 of_node = component->dev->of_node;
828 if (!of_node && component->dev->parent)
829 of_node = component->dev->parent->of_node;
834 struct of_phandle_args *snd_soc_copy_dai_args(struct device *dev,
835 const struct of_phandle_args *args)
837 struct of_phandle_args *ret = devm_kzalloc(dev, sizeof(*ret), GFP_KERNEL);
846 EXPORT_SYMBOL_GPL(snd_soc_copy_dai_args);
848 static int snd_soc_is_matching_component(
849 const struct snd_soc_dai_link_component *dlc,
850 struct snd_soc_component *component)
852 struct device_node *component_of_node;
858 struct snd_soc_dai *dai;
860 for_each_component_dais(component, dai)
861 if (snd_soc_is_matching_dai(dlc, dai))
866 component_of_node = soc_component_to_node(component);
868 if (dlc->of_node && component_of_node != dlc->of_node)
870 if (dlc->name && strcmp(component->name, dlc->name))
876 static struct snd_soc_component *soc_find_component(
877 const struct snd_soc_dai_link_component *dlc)
879 struct snd_soc_component *component;
881 lockdep_assert_held(&client_mutex);
886 * It returns *1st* found component, but some driver
887 * has few components by same of_node/name
889 * CPU component and generic DMAEngine component
891 for_each_component(component)
892 if (snd_soc_is_matching_component(dlc, component))
899 * snd_soc_find_dai - Find a registered DAI
901 * @dlc: name of the DAI or the DAI driver and optional component info to match
903 * This function will search all registered components and their DAIs to
904 * find the DAI of the same name. The component's of_node and name
905 * should also match if being specified.
907 * Return: pointer of DAI, or NULL if not found.
909 struct snd_soc_dai *snd_soc_find_dai(
910 const struct snd_soc_dai_link_component *dlc)
912 struct snd_soc_component *component;
913 struct snd_soc_dai *dai;
915 lockdep_assert_held(&client_mutex);
917 /* Find CPU DAI from registered DAIs */
918 for_each_component(component)
919 if (snd_soc_is_matching_component(dlc, component))
920 for_each_component_dais(component, dai)
921 if (snd_soc_is_matching_dai(dlc, dai))
926 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
928 struct snd_soc_dai *snd_soc_find_dai_with_mutex(
929 const struct snd_soc_dai_link_component *dlc)
931 struct snd_soc_dai *dai;
933 mutex_lock(&client_mutex);
934 dai = snd_soc_find_dai(dlc);
935 mutex_unlock(&client_mutex);
939 EXPORT_SYMBOL_GPL(snd_soc_find_dai_with_mutex);
941 static int soc_dai_link_sanity_check(struct snd_soc_card *card,
942 struct snd_soc_dai_link *link)
945 struct snd_soc_dai_link_component *dlc;
948 for_each_link_codecs(link, i, dlc) {
950 * Codec must be specified by 1 of name or OF node,
951 * not both or neither.
953 if (snd_soc_dlc_component_is_invalid(dlc))
954 goto component_invalid;
956 if (snd_soc_dlc_component_is_empty(dlc))
957 goto component_empty;
959 /* Codec DAI name must be specified */
960 if (snd_soc_dlc_dai_is_empty(dlc))
964 * Defer card registration if codec component is not added to
967 if (!soc_find_component(dlc))
968 goto component_not_found;
972 for_each_link_platforms(link, i, dlc) {
974 * Platform may be specified by either name or OF node, but it
975 * can be left unspecified, then no components will be inserted
978 if (snd_soc_dlc_component_is_invalid(dlc))
979 goto component_invalid;
981 if (snd_soc_dlc_component_is_empty(dlc))
982 goto component_empty;
985 * Defer card registration if platform component is not added to
988 if (!soc_find_component(dlc))
989 goto component_not_found;
993 for_each_link_cpus(link, i, dlc) {
995 * CPU device may be specified by either name or OF node, but
996 * can be left unspecified, and will be matched based on DAI
999 if (snd_soc_dlc_component_is_invalid(dlc))
1000 goto component_invalid;
1003 if (snd_soc_dlc_component_is_empty(dlc)) {
1005 * At least one of CPU DAI name or CPU device name/node must be specified
1007 if (snd_soc_dlc_dai_is_empty(dlc))
1008 goto component_dai_empty;
1011 * Defer card registration if Component is not added
1013 if (!soc_find_component(dlc))
1014 goto component_not_found;
1021 dev_err(card->dev, "ASoC: Both Component name/of_node are set for %s\n", link->name);
1025 dev_err(card->dev, "ASoC: Neither Component name/of_node are set for %s\n", link->name);
1028 component_not_found:
1029 dev_dbg(card->dev, "ASoC: Component %s not found for link %s\n", dlc->name, link->name);
1030 return -EPROBE_DEFER;
1033 dev_err(card->dev, "ASoC: DAI name is not set for %s\n", link->name);
1036 component_dai_empty:
1037 dev_err(card->dev, "ASoC: Neither DAI/Component name/of_node are set for %s\n", link->name);
1041 #define MAX_DEFAULT_CH_MAP_SIZE 8
1042 static struct snd_soc_dai_link_ch_map default_ch_map_sync[MAX_DEFAULT_CH_MAP_SIZE] = {
1043 { .cpu = 0, .codec = 0 },
1044 { .cpu = 1, .codec = 1 },
1045 { .cpu = 2, .codec = 2 },
1046 { .cpu = 3, .codec = 3 },
1047 { .cpu = 4, .codec = 4 },
1048 { .cpu = 5, .codec = 5 },
1049 { .cpu = 6, .codec = 6 },
1050 { .cpu = 7, .codec = 7 },
1052 static struct snd_soc_dai_link_ch_map default_ch_map_1cpu[MAX_DEFAULT_CH_MAP_SIZE] = {
1053 { .cpu = 0, .codec = 0 },
1054 { .cpu = 0, .codec = 1 },
1055 { .cpu = 0, .codec = 2 },
1056 { .cpu = 0, .codec = 3 },
1057 { .cpu = 0, .codec = 4 },
1058 { .cpu = 0, .codec = 5 },
1059 { .cpu = 0, .codec = 6 },
1060 { .cpu = 0, .codec = 7 },
1062 static struct snd_soc_dai_link_ch_map default_ch_map_1codec[MAX_DEFAULT_CH_MAP_SIZE] = {
1063 { .cpu = 0, .codec = 0 },
1064 { .cpu = 1, .codec = 0 },
1065 { .cpu = 2, .codec = 0 },
1066 { .cpu = 3, .codec = 0 },
1067 { .cpu = 4, .codec = 0 },
1068 { .cpu = 5, .codec = 0 },
1069 { .cpu = 6, .codec = 0 },
1070 { .cpu = 7, .codec = 0 },
1072 static int snd_soc_compensate_channel_connection_map(struct snd_soc_card *card,
1073 struct snd_soc_dai_link *dai_link)
1075 struct snd_soc_dai_link_ch_map *ch_maps;
1079 * dai_link->ch_maps indicates how CPU/Codec are connected.
1080 * It will be a map seen from a larger number of DAI.
1082 * soc.h :: [dai_link->ch_maps Image sample]
1085 /* it should have ch_maps if connection was N:M */
1086 if (dai_link->num_cpus > 1 && dai_link->num_codecs > 1 &&
1087 dai_link->num_cpus != dai_link->num_codecs && !dai_link->ch_maps) {
1088 dev_err(card->dev, "need to have ch_maps when N:M connection (%s)",
1093 /* do nothing if it has own maps */
1094 if (dai_link->ch_maps)
1097 /* check default map size */
1098 if (dai_link->num_cpus > MAX_DEFAULT_CH_MAP_SIZE ||
1099 dai_link->num_codecs > MAX_DEFAULT_CH_MAP_SIZE) {
1100 dev_err(card->dev, "soc-core.c needs update default_connection_maps");
1104 /* Compensate missing map for ... */
1105 if (dai_link->num_cpus == dai_link->num_codecs)
1106 dai_link->ch_maps = default_ch_map_sync; /* for 1:1 or N:N */
1107 else if (dai_link->num_cpus < dai_link->num_codecs)
1108 dai_link->ch_maps = default_ch_map_1cpu; /* for 1:N */
1110 dai_link->ch_maps = default_ch_map_1codec; /* for N:1 */
1113 dev_dbg(card->dev, "dai_link %s\n", dai_link->stream_name);
1114 for_each_link_ch_maps(dai_link, i, ch_maps) {
1115 if ((ch_maps->cpu >= dai_link->num_cpus) ||
1116 (ch_maps->codec >= dai_link->num_codecs)) {
1118 "unexpected dai_link->ch_maps[%d] index (cpu(%d/%d) codec(%d/%d))",
1120 ch_maps->cpu, dai_link->num_cpus,
1121 ch_maps->codec, dai_link->num_codecs);
1125 dev_dbg(card->dev, " [%d] cpu%d <-> codec%d\n",
1126 i, ch_maps->cpu, ch_maps->codec);
1133 * snd_soc_remove_pcm_runtime - Remove a pcm_runtime from card
1134 * @card: The ASoC card to which the pcm_runtime has
1135 * @rtd: The pcm_runtime to remove
1137 * This function removes a pcm_runtime from the ASoC card.
1139 void snd_soc_remove_pcm_runtime(struct snd_soc_card *card,
1140 struct snd_soc_pcm_runtime *rtd)
1142 lockdep_assert_held(&client_mutex);
1145 * Notify the machine driver for extra destruction
1147 snd_soc_card_remove_dai_link(card, rtd->dai_link);
1149 soc_free_pcm_runtime(rtd);
1151 EXPORT_SYMBOL_GPL(snd_soc_remove_pcm_runtime);
1154 * snd_soc_add_pcm_runtime - Add a pcm_runtime dynamically via dai_link
1155 * @card: The ASoC card to which the pcm_runtime is added
1156 * @dai_link: The DAI link to find pcm_runtime
1158 * This function adds a pcm_runtime ASoC card by using dai_link.
1160 * Note: Topology can use this API to add pcm_runtime when probing the
1161 * topology component. And machine drivers can still define static
1162 * DAI links in dai_link array.
1164 static int snd_soc_add_pcm_runtime(struct snd_soc_card *card,
1165 struct snd_soc_dai_link *dai_link)
1167 struct snd_soc_pcm_runtime *rtd;
1168 struct snd_soc_dai_link_component *codec, *platform, *cpu;
1169 struct snd_soc_component *component;
1172 lockdep_assert_held(&client_mutex);
1175 * Notify the machine driver for extra initialization
1177 ret = snd_soc_card_add_dai_link(card, dai_link);
1181 if (dai_link->ignore)
1184 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1186 ret = soc_dai_link_sanity_check(card, dai_link);
1190 rtd = soc_new_pcm_runtime(card, dai_link);
1194 for_each_link_cpus(dai_link, i, cpu) {
1195 snd_soc_rtd_to_cpu(rtd, i) = snd_soc_find_dai(cpu);
1196 if (!snd_soc_rtd_to_cpu(rtd, i)) {
1197 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1201 snd_soc_rtd_add_component(rtd, snd_soc_rtd_to_cpu(rtd, i)->component);
1204 /* Find CODEC from registered CODECs */
1205 for_each_link_codecs(dai_link, i, codec) {
1206 snd_soc_rtd_to_codec(rtd, i) = snd_soc_find_dai(codec);
1207 if (!snd_soc_rtd_to_codec(rtd, i)) {
1208 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
1213 snd_soc_rtd_add_component(rtd, snd_soc_rtd_to_codec(rtd, i)->component);
1216 /* Find PLATFORM from registered PLATFORMs */
1217 for_each_link_platforms(dai_link, i, platform) {
1218 for_each_component(component) {
1219 if (!snd_soc_is_matching_component(platform, component))
1222 if (snd_soc_component_is_dummy(component) && component->num_dai)
1225 snd_soc_rtd_add_component(rtd, component);
1232 snd_soc_remove_pcm_runtime(card, rtd);
1233 return -EPROBE_DEFER;
1236 int snd_soc_add_pcm_runtimes(struct snd_soc_card *card,
1237 struct snd_soc_dai_link *dai_link,
1240 for (int i = 0; i < num_dai_link; i++) {
1243 ret = snd_soc_compensate_channel_connection_map(card, dai_link + i);
1247 ret = snd_soc_add_pcm_runtime(card, dai_link + i);
1254 EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtimes);
1256 static void snd_soc_runtime_get_dai_fmt(struct snd_soc_pcm_runtime *rtd)
1258 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1259 struct snd_soc_dai *dai, *not_used;
1260 u64 pos, possible_fmt;
1261 unsigned int mask = 0, dai_fmt = 0;
1262 int i, j, priority, pri, until;
1265 * Get selectable format from each DAIs.
1267 ****************************
1269 * Using .auto_selectable_formats is not mandatory,
1270 * we can select format manually from Sound Card.
1271 * When use it, driver should list well tested format only.
1272 ****************************
1275 * auto_selectable_formats (= SND_SOC_POSSIBLE_xxx)
1277 * DAI0_: { 0x000F, 0x00F0, 0x0F00 };
1278 * DAI1 : { 0xF000, 0x0F00 };
1281 * "until" will be 3 in this case (MAX array size from DAI0 and DAI1)
1282 * Here is dev_dbg() message and comments
1285 * DAI0: (pri, fmt) = (1, 000000000000000F) // 1st check (A) DAI1 is not selected
1286 * DAI1: (pri, fmt) = (0, 0000000000000000) // Necessary Waste
1287 * DAI0: (pri, fmt) = (1, 000000000000000F) // 2nd check (A)
1288 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1290 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 3rd check (A) + (B)
1291 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1292 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 4th check (A) + (B)
1293 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1295 * DAI0: (pri, fmt) = (3, 0000000000000FFF) // 5th check (A) + (B) + (C)
1296 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1297 * found auto selected format: 0000000000000F00
1299 until = snd_soc_dai_get_fmt_max_priority(rtd);
1300 for (priority = 1; priority <= until; priority++) {
1301 for_each_rtd_dais(rtd, j, not_used) {
1303 possible_fmt = ULLONG_MAX;
1304 for_each_rtd_dais(rtd, i, dai) {
1307 pri = (j >= i) ? priority : priority - 1;
1308 fmt = snd_soc_dai_get_fmt(dai, pri);
1309 possible_fmt &= fmt;
1319 * convert POSSIBLE_DAIFMT to DAIFMT
1321 * Some basic/default settings on each is defined as 0.
1323 * SND_SOC_DAIFMT_NB_NF
1324 * SND_SOC_DAIFMT_GATED
1326 * SND_SOC_DAIFMT_xxx_MASK can't notice it if Sound Card specify
1327 * these value, and will be overwrite to auto selected value.
1329 * To avoid such issue, loop from 63 to 0 here.
1330 * Small number of SND_SOC_POSSIBLE_xxx will be Hi priority.
1331 * Basic/Default settings of each part and above are defined
1332 * as Hi priority (= small number) of SND_SOC_POSSIBLE_xxx.
1334 for (i = 63; i >= 0; i--) {
1336 switch (possible_fmt & pos) {
1340 case SND_SOC_POSSIBLE_DAIFMT_I2S:
1341 case SND_SOC_POSSIBLE_DAIFMT_RIGHT_J:
1342 case SND_SOC_POSSIBLE_DAIFMT_LEFT_J:
1343 case SND_SOC_POSSIBLE_DAIFMT_DSP_A:
1344 case SND_SOC_POSSIBLE_DAIFMT_DSP_B:
1345 case SND_SOC_POSSIBLE_DAIFMT_AC97:
1346 case SND_SOC_POSSIBLE_DAIFMT_PDM:
1347 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_FORMAT_MASK) | i;
1352 case SND_SOC_POSSIBLE_DAIFMT_CONT:
1353 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_CONT;
1355 case SND_SOC_POSSIBLE_DAIFMT_GATED:
1356 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_GATED;
1361 case SND_SOC_POSSIBLE_DAIFMT_NB_NF:
1362 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_NF;
1364 case SND_SOC_POSSIBLE_DAIFMT_NB_IF:
1365 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_IF;
1367 case SND_SOC_POSSIBLE_DAIFMT_IB_NF:
1368 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_NF;
1370 case SND_SOC_POSSIBLE_DAIFMT_IB_IF:
1371 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_IF;
1374 * for clock provider / consumer
1376 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFP:
1377 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFP;
1379 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFP:
1380 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFP;
1382 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFC:
1383 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFC;
1385 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFC:
1386 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFC;
1392 * Some driver might have very complex limitation.
1393 * In such case, user want to auto-select non-limitation part,
1394 * and want to manually specify complex part.
1396 * Or for example, if both CPU and Codec can be clock provider,
1397 * but because of its quality, user want to specify it manually.
1399 * Use manually specified settings if sound card did.
1401 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK))
1402 mask |= SND_SOC_DAIFMT_FORMAT_MASK;
1403 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_MASK))
1404 mask |= SND_SOC_DAIFMT_CLOCK_MASK;
1405 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_INV_MASK))
1406 mask |= SND_SOC_DAIFMT_INV_MASK;
1407 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK))
1408 mask |= SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
1410 dai_link->dai_fmt |= (dai_fmt & mask);
1414 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1415 * @rtd: The runtime for which the DAI link format should be changed
1416 * @dai_fmt: The new DAI link format
1418 * This function updates the DAI link format for all DAIs connected to the DAI
1419 * link for the specified runtime.
1421 * Note: For setups with a static format set the dai_fmt field in the
1422 * corresponding snd_dai_link struct instead of using this function.
1424 * Returns 0 on success, otherwise a negative error code.
1426 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1427 unsigned int dai_fmt)
1429 struct snd_soc_dai *cpu_dai;
1430 struct snd_soc_dai *codec_dai;
1437 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1438 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1439 if (ret != 0 && ret != -ENOTSUPP)
1443 /* Flip the polarity for the "CPU" end of link */
1444 dai_fmt = snd_soc_daifmt_clock_provider_flipped(dai_fmt);
1446 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1447 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1448 if (ret != 0 && ret != -ENOTSUPP)
1454 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1456 static int soc_init_pcm_runtime(struct snd_soc_card *card,
1457 struct snd_soc_pcm_runtime *rtd)
1459 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1460 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
1461 struct snd_soc_component *component;
1464 /* do machine specific initialization */
1465 ret = snd_soc_link_init(rtd);
1469 snd_soc_runtime_get_dai_fmt(rtd);
1470 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1474 /* add DPCM sysfs entries */
1475 soc_dpcm_debugfs_add(rtd);
1480 * most drivers will register their PCMs using DAI link ordering but
1481 * topology based drivers can use the DAI link id field to set PCM
1482 * device number and then use rtd + a base offset of the BEs.
1484 for_each_rtd_components(rtd, i, component) {
1485 if (!component->driver->use_dai_pcm_id)
1488 if (rtd->dai_link->no_pcm)
1489 num += component->driver->be_pcm_base;
1491 num = rtd->dai_link->id;
1494 /* create compress_device if possible */
1495 ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1496 if (ret != -ENOTSUPP)
1499 /* create the pcm */
1500 ret = soc_new_pcm(rtd, num);
1502 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1503 dai_link->stream_name, ret);
1507 ret = snd_soc_pcm_dai_new(rtd);
1511 rtd->initialized = true;
1515 snd_soc_link_exit(rtd);
1519 static void soc_set_name_prefix(struct snd_soc_card *card,
1520 struct snd_soc_component *component)
1522 struct device_node *of_node = soc_component_to_node(component);
1526 for (i = 0; i < card->num_configs; i++) {
1527 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1529 if (snd_soc_is_matching_component(&map->dlc, component) &&
1531 component->name_prefix = map->name_prefix;
1537 * If there is no configuration table or no match in the table,
1538 * check if a prefix is provided in the node
1540 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1544 component->name_prefix = str;
1547 static void soc_remove_component(struct snd_soc_component *component,
1551 if (!component->card)
1555 snd_soc_component_remove(component);
1557 list_del_init(&component->card_list);
1558 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1559 soc_cleanup_component_debugfs(component);
1560 component->card = NULL;
1561 snd_soc_component_module_put_when_remove(component);
1564 static int soc_probe_component(struct snd_soc_card *card,
1565 struct snd_soc_component *component)
1567 struct snd_soc_dapm_context *dapm =
1568 snd_soc_component_get_dapm(component);
1569 struct snd_soc_dai *dai;
1573 if (snd_soc_component_is_dummy(component))
1576 if (component->card) {
1577 if (component->card != card) {
1578 dev_err(component->dev,
1579 "Trying to bind component \"%s\" to card \"%s\" but is already bound to card \"%s\"\n",
1580 component->name, card->name, component->card->name);
1586 ret = snd_soc_component_module_get_when_probe(component);
1590 component->card = card;
1591 soc_set_name_prefix(card, component);
1593 soc_init_component_debugfs(component);
1595 snd_soc_dapm_init(dapm, card, component);
1597 ret = snd_soc_dapm_new_controls(dapm,
1598 component->driver->dapm_widgets,
1599 component->driver->num_dapm_widgets);
1602 dev_err(component->dev,
1603 "Failed to create new controls %d\n", ret);
1607 for_each_component_dais(component, dai) {
1608 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1610 dev_err(component->dev,
1611 "Failed to create DAI widgets %d\n", ret);
1616 ret = snd_soc_component_probe(component);
1620 WARN(dapm->idle_bias_off &&
1621 dapm->bias_level != SND_SOC_BIAS_OFF,
1622 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1627 * machine specific init
1629 * snd_soc_component_set_aux()
1631 ret = snd_soc_component_init(component);
1635 ret = snd_soc_add_component_controls(component,
1636 component->driver->controls,
1637 component->driver->num_controls);
1641 ret = snd_soc_dapm_add_routes(dapm,
1642 component->driver->dapm_routes,
1643 component->driver->num_dapm_routes);
1645 if (card->disable_route_checks) {
1647 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1651 "%s: snd_soc_dapm_add_routes failed: %d\n",
1657 /* see for_each_card_components */
1658 list_add(&component->card_list, &card->component_dev_list);
1662 soc_remove_component(component, probed);
1667 static void soc_remove_link_dais(struct snd_soc_card *card)
1669 struct snd_soc_pcm_runtime *rtd;
1672 for_each_comp_order(order) {
1673 for_each_card_rtds(card, rtd) {
1674 /* remove all rtd connected DAIs in good order */
1675 snd_soc_pcm_dai_remove(rtd, order);
1680 static int soc_probe_link_dais(struct snd_soc_card *card)
1682 struct snd_soc_pcm_runtime *rtd;
1685 for_each_comp_order(order) {
1686 for_each_card_rtds(card, rtd) {
1687 /* probe all rtd connected DAIs in good order */
1688 ret = snd_soc_pcm_dai_probe(rtd, order);
1697 static void soc_remove_link_components(struct snd_soc_card *card)
1699 struct snd_soc_component *component;
1700 struct snd_soc_pcm_runtime *rtd;
1703 for_each_comp_order(order) {
1704 for_each_card_rtds(card, rtd) {
1705 for_each_rtd_components(rtd, i, component) {
1706 if (component->driver->remove_order != order)
1709 soc_remove_component(component, 1);
1715 static int soc_probe_link_components(struct snd_soc_card *card)
1717 struct snd_soc_component *component;
1718 struct snd_soc_pcm_runtime *rtd;
1721 for_each_comp_order(order) {
1722 for_each_card_rtds(card, rtd) {
1723 for_each_rtd_components(rtd, i, component) {
1724 if (component->driver->probe_order != order)
1727 ret = soc_probe_component(card, component);
1737 static void soc_unbind_aux_dev(struct snd_soc_card *card)
1739 struct snd_soc_component *component, *_component;
1741 for_each_card_auxs_safe(card, component, _component) {
1742 /* for snd_soc_component_init() */
1743 snd_soc_component_set_aux(component, NULL);
1744 list_del(&component->card_aux_list);
1748 static int soc_bind_aux_dev(struct snd_soc_card *card)
1750 struct snd_soc_component *component;
1751 struct snd_soc_aux_dev *aux;
1754 for_each_card_pre_auxs(card, i, aux) {
1755 /* codecs, usually analog devices */
1756 component = soc_find_component(&aux->dlc);
1758 return -EPROBE_DEFER;
1760 /* for snd_soc_component_init() */
1761 snd_soc_component_set_aux(component, aux);
1762 /* see for_each_card_auxs */
1763 list_add(&component->card_aux_list, &card->aux_comp_list);
1768 static int soc_probe_aux_devices(struct snd_soc_card *card)
1770 struct snd_soc_component *component;
1774 for_each_comp_order(order) {
1775 for_each_card_auxs(card, component) {
1776 if (component->driver->probe_order != order)
1779 ret = soc_probe_component(card, component);
1788 static void soc_remove_aux_devices(struct snd_soc_card *card)
1790 struct snd_soc_component *comp, *_comp;
1793 for_each_comp_order(order) {
1794 for_each_card_auxs_safe(card, comp, _comp) {
1795 if (comp->driver->remove_order == order)
1796 soc_remove_component(comp, 1);
1803 * If a DMI filed contain strings in this blacklist (e.g.
1804 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
1805 * as invalid and dropped when setting the card long name from DMI info.
1807 static const char * const dmi_blacklist[] = {
1808 "To be filled by OEM",
1811 "Board Manufacturer",
1812 "Board Vendor Name",
1813 "Board Product Name",
1814 NULL, /* terminator */
1818 * Trim special characters, and replace '-' with '_' since '-' is used to
1819 * separate different DMI fields in the card long name. Only number and
1820 * alphabet characters and a few separator characters are kept.
1822 static void cleanup_dmi_name(char *name)
1826 for (i = 0; name[i]; i++) {
1827 if (isalnum(name[i]) || (name[i] == '.')
1828 || (name[i] == '_'))
1829 name[j++] = name[i];
1830 else if (name[i] == '-')
1838 * Check if a DMI field is valid, i.e. not containing any string
1839 * in the black list.
1841 static int is_dmi_valid(const char *field)
1845 while (dmi_blacklist[i]) {
1846 if (strstr(field, dmi_blacklist[i]))
1855 * Append a string to card->dmi_longname with character cleanups.
1857 static void append_dmi_string(struct snd_soc_card *card, const char *str)
1859 char *dst = card->dmi_longname;
1860 size_t dst_len = sizeof(card->dmi_longname);
1864 snprintf(dst + len, dst_len - len, "-%s", str);
1866 len++; /* skip the separator "-" */
1868 cleanup_dmi_name(dst + len);
1872 * snd_soc_set_dmi_name() - Register DMI names to card
1873 * @card: The card to register DMI names
1874 * @flavour: The flavour "differentiator" for the card amongst its peers.
1876 * An Intel machine driver may be used by many different devices but are
1877 * difficult for userspace to differentiate, since machine drivers usually
1878 * use their own name as the card short name and leave the card long name
1879 * blank. To differentiate such devices and fix bugs due to lack of
1880 * device-specific configurations, this function allows DMI info to be used
1881 * as the sound card long name, in the format of
1882 * "vendor-product-version-board"
1883 * (Character '-' is used to separate different DMI fields here).
1884 * This will help the user space to load the device-specific Use Case Manager
1885 * (UCM) configurations for the card.
1887 * Possible card long names may be:
1888 * DellInc.-XPS139343-01-0310JH
1889 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1890 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1892 * This function also supports flavoring the card longname to provide
1893 * the extra differentiation, like "vendor-product-version-board-flavor".
1895 * We only keep number and alphabet characters and a few separator characters
1896 * in the card long name since UCM in the user space uses the card long names
1897 * as card configuration directory names and AudoConf cannot support special
1898 * characters like SPACE.
1900 * Returns 0 on success, otherwise a negative error code.
1902 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1904 const char *vendor, *product, *board;
1906 if (card->long_name)
1907 return 0; /* long name already set by driver or from DMI */
1912 /* make up dmi long name as: vendor-product-version-board */
1913 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1914 if (!vendor || !is_dmi_valid(vendor)) {
1915 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1919 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1920 cleanup_dmi_name(card->dmi_longname);
1922 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1923 if (product && is_dmi_valid(product)) {
1924 const char *product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1926 append_dmi_string(card, product);
1929 * some vendors like Lenovo may only put a self-explanatory
1930 * name in the product version field
1932 if (product_version && is_dmi_valid(product_version))
1933 append_dmi_string(card, product_version);
1936 board = dmi_get_system_info(DMI_BOARD_NAME);
1937 if (board && is_dmi_valid(board)) {
1938 if (!product || strcasecmp(board, product))
1939 append_dmi_string(card, board);
1940 } else if (!product) {
1941 /* fall back to using legacy name */
1942 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1946 /* Add flavour to dmi long name */
1948 append_dmi_string(card, flavour);
1950 /* set the card long name */
1951 card->long_name = card->dmi_longname;
1955 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1956 #endif /* CONFIG_DMI */
1958 static void soc_check_tplg_fes(struct snd_soc_card *card)
1960 struct snd_soc_component *component;
1961 const struct snd_soc_component_driver *comp_drv;
1962 struct snd_soc_dai_link *dai_link;
1965 for_each_component(component) {
1967 /* does this component override BEs ? */
1968 if (!component->driver->ignore_machine)
1971 /* for this machine ? */
1972 if (!strcmp(component->driver->ignore_machine,
1973 card->dev->driver->name))
1975 if (strcmp(component->driver->ignore_machine,
1976 dev_name(card->dev)))
1979 /* machine matches, so override the rtd data */
1980 for_each_card_prelinks(card, i, dai_link) {
1982 /* ignore this FE */
1983 if (dai_link->dynamic) {
1984 dai_link->ignore = true;
1988 dev_dbg(card->dev, "info: override BE DAI link %s\n",
1989 card->dai_link[i].name);
1991 /* override platform component */
1992 if (!dai_link->platforms) {
1993 dev_err(card->dev, "init platform error");
1997 if (component->dev->of_node)
1998 dai_link->platforms->of_node = component->dev->of_node;
2000 dai_link->platforms->name = component->name;
2002 /* convert non BE into BE */
2003 if (!dai_link->no_pcm) {
2004 dai_link->no_pcm = 1;
2006 if (dai_link->dpcm_playback)
2008 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_playback=1\n",
2010 if (dai_link->dpcm_capture)
2012 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_capture=1\n",
2015 /* convert normal link into DPCM one */
2016 if (!(dai_link->dpcm_playback ||
2017 dai_link->dpcm_capture)) {
2018 dai_link->dpcm_playback = !dai_link->capture_only;
2019 dai_link->dpcm_capture = !dai_link->playback_only;
2024 * override any BE fixups
2026 * snd_soc_link_be_hw_params_fixup()
2028 dai_link->be_hw_params_fixup =
2029 component->driver->be_hw_params_fixup;
2032 * most BE links don't set stream name, so set it to
2033 * dai link name if it's NULL to help bind widgets.
2035 if (!dai_link->stream_name)
2036 dai_link->stream_name = dai_link->name;
2039 /* Inform userspace we are using alternate topology */
2040 if (component->driver->topology_name_prefix) {
2042 /* topology shortname created? */
2043 if (!card->topology_shortname_created) {
2044 comp_drv = component->driver;
2046 snprintf(card->topology_shortname, 32, "%s-%s",
2047 comp_drv->topology_name_prefix,
2049 card->topology_shortname_created = true;
2052 /* use topology shortname */
2053 card->name = card->topology_shortname;
2058 #define soc_setup_card_name(card, name, name1, name2) \
2059 __soc_setup_card_name(card, name, sizeof(name), name1, name2)
2060 static void __soc_setup_card_name(struct snd_soc_card *card,
2061 char *name, int len,
2062 const char *name1, const char *name2)
2064 const char *src = name1 ? name1 : name2;
2067 snprintf(name, len, "%s", src);
2069 if (name != card->snd_card->driver)
2073 * Name normalization (driver field)
2075 * The driver name is somewhat special, as it's used as a key for
2076 * searches in the user-space.
2079 * "abcd??efg" -> "abcd__efg"
2081 for (i = 0; i < len; i++) {
2088 if (!isalnum(name[i]))
2095 * The driver field should contain a valid string from the user view.
2096 * The wrapping usually does not work so well here. Set a smaller string
2097 * in the specific ASoC driver.
2099 if (strlen(src) > len - 1)
2100 dev_err(card->dev, "ASoC: driver name too long '%s' -> '%s'\n", src, name);
2103 static void soc_cleanup_card_resources(struct snd_soc_card *card)
2105 struct snd_soc_pcm_runtime *rtd, *n;
2108 snd_card_disconnect_sync(card->snd_card);
2110 snd_soc_dapm_shutdown(card);
2112 /* release machine specific resources */
2113 for_each_card_rtds(card, rtd)
2114 if (rtd->initialized)
2115 snd_soc_link_exit(rtd);
2116 /* remove and free each DAI */
2117 soc_remove_link_dais(card);
2118 soc_remove_link_components(card);
2120 for_each_card_rtds_safe(card, rtd, n)
2121 snd_soc_remove_pcm_runtime(card, rtd);
2123 /* remove auxiliary devices */
2124 soc_remove_aux_devices(card);
2125 soc_unbind_aux_dev(card);
2127 snd_soc_dapm_free(&card->dapm);
2128 soc_cleanup_card_debugfs(card);
2130 /* remove the card */
2131 snd_soc_card_remove(card);
2133 if (card->snd_card) {
2134 snd_card_free(card->snd_card);
2135 card->snd_card = NULL;
2139 static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
2141 if (snd_soc_card_is_instantiated(card)) {
2142 card->instantiated = false;
2143 snd_soc_flush_all_delayed_work(card);
2145 soc_cleanup_card_resources(card);
2147 list_add(&card->list, &unbind_card_list);
2150 list_del(&card->list);
2154 static int snd_soc_bind_card(struct snd_soc_card *card)
2156 struct snd_soc_pcm_runtime *rtd;
2157 struct snd_soc_component *component;
2160 mutex_lock(&client_mutex);
2161 snd_soc_card_mutex_lock_root(card);
2163 snd_soc_fill_dummy_dai(card);
2165 snd_soc_dapm_init(&card->dapm, card, NULL);
2167 /* check whether any platform is ignore machine FE and using topology */
2168 soc_check_tplg_fes(card);
2170 /* bind aux_devs too */
2171 ret = soc_bind_aux_dev(card);
2175 /* add predefined DAI links to the list */
2177 ret = snd_soc_add_pcm_runtimes(card, card->dai_link, card->num_links);
2181 /* card bind complete so register a sound card */
2182 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2183 card->owner, 0, &card->snd_card);
2186 "ASoC: can't create sound card for card %s: %d\n",
2191 soc_init_card_debugfs(card);
2193 soc_resume_init(card);
2195 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2196 card->num_dapm_widgets);
2200 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2201 card->num_of_dapm_widgets);
2205 /* initialise the sound card only once */
2206 ret = snd_soc_card_probe(card);
2210 /* probe all components used by DAI links on this card */
2211 ret = soc_probe_link_components(card);
2213 if (ret != -EPROBE_DEFER) {
2215 "ASoC: failed to instantiate card %d\n", ret);
2220 /* probe auxiliary components */
2221 ret = soc_probe_aux_devices(card);
2224 "ASoC: failed to probe aux component %d\n", ret);
2228 /* probe all DAI links on this card */
2229 ret = soc_probe_link_dais(card);
2232 "ASoC: failed to instantiate card %d\n", ret);
2236 for_each_card_rtds(card, rtd) {
2237 ret = soc_init_pcm_runtime(card, rtd);
2242 snd_soc_dapm_link_dai_widgets(card);
2243 snd_soc_dapm_connect_dai_link_widgets(card);
2245 ret = snd_soc_add_card_controls(card, card->controls,
2246 card->num_controls);
2250 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2251 card->num_dapm_routes);
2253 if (card->disable_route_checks) {
2255 "%s: disable_route_checks set, ignoring errors on add_routes\n",
2259 "%s: snd_soc_dapm_add_routes failed: %d\n",
2265 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2266 card->num_of_dapm_routes);
2270 /* try to set some sane longname if DMI is available */
2271 snd_soc_set_dmi_name(card, NULL);
2273 soc_setup_card_name(card, card->snd_card->shortname,
2275 soc_setup_card_name(card, card->snd_card->longname,
2276 card->long_name, card->name);
2277 soc_setup_card_name(card, card->snd_card->driver,
2278 card->driver_name, card->name);
2280 if (card->components) {
2281 /* the current implementation of snd_component_add() accepts */
2282 /* multiple components in the string separated by space, */
2283 /* but the string collision (identical string) check might */
2284 /* not work correctly */
2285 ret = snd_component_add(card->snd_card, card->components);
2287 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
2293 ret = snd_soc_card_late_probe(card);
2297 snd_soc_dapm_new_widgets(card);
2298 snd_soc_card_fixup_controls(card);
2300 ret = snd_card_register(card->snd_card);
2302 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2307 card->instantiated = 1;
2308 dapm_mark_endpoints_dirty(card);
2309 snd_soc_dapm_sync(&card->dapm);
2311 /* deactivate pins to sleep state */
2312 for_each_card_components(card, component)
2313 if (!snd_soc_component_active(component))
2314 pinctrl_pm_select_sleep_state(component->dev);
2318 soc_cleanup_card_resources(card);
2320 snd_soc_card_mutex_unlock(card);
2321 mutex_unlock(&client_mutex);
2326 /* probes a new socdev */
2327 static int soc_probe(struct platform_device *pdev)
2329 struct snd_soc_card *card = platform_get_drvdata(pdev);
2332 * no card, so machine driver should be registering card
2333 * we should not be here in that case so ret error
2338 dev_warn(&pdev->dev,
2339 "ASoC: machine %s should use snd_soc_register_card()\n",
2342 /* Bodge while we unpick instantiation */
2343 card->dev = &pdev->dev;
2345 return devm_snd_soc_register_card(&pdev->dev, card);
2348 int snd_soc_poweroff(struct device *dev)
2350 struct snd_soc_card *card = dev_get_drvdata(dev);
2351 struct snd_soc_component *component;
2353 if (!snd_soc_card_is_instantiated(card))
2357 * Flush out pmdown_time work - we actually do want to run it
2358 * now, we're shutting down so no imminent restart.
2360 snd_soc_flush_all_delayed_work(card);
2362 snd_soc_dapm_shutdown(card);
2364 /* deactivate pins to sleep state */
2365 for_each_card_components(card, component)
2366 pinctrl_pm_select_sleep_state(component->dev);
2370 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2372 const struct dev_pm_ops snd_soc_pm_ops = {
2373 .suspend = snd_soc_suspend,
2374 .resume = snd_soc_resume,
2375 .freeze = snd_soc_suspend,
2376 .thaw = snd_soc_resume,
2377 .poweroff = snd_soc_poweroff,
2378 .restore = snd_soc_resume,
2380 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2382 /* ASoC platform driver */
2383 static struct platform_driver soc_driver = {
2385 .name = "soc-audio",
2386 .pm = &snd_soc_pm_ops,
2392 * snd_soc_cnew - create new control
2393 * @_template: control template
2394 * @data: control private data
2395 * @long_name: control long name
2396 * @prefix: control name prefix
2398 * Create a new mixer control from a template control.
2400 * Returns 0 for success, else error.
2402 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2403 void *data, const char *long_name,
2406 struct snd_kcontrol_new template;
2407 struct snd_kcontrol *kcontrol;
2410 memcpy(&template, _template, sizeof(template));
2414 long_name = template.name;
2417 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2421 template.name = name;
2423 template.name = long_name;
2426 kcontrol = snd_ctl_new1(&template, data);
2432 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2434 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2435 const struct snd_kcontrol_new *controls, int num_controls,
2436 const char *prefix, void *data)
2440 for (i = 0; i < num_controls; i++) {
2441 const struct snd_kcontrol_new *control = &controls[i];
2442 int err = snd_ctl_add(card, snd_soc_cnew(control, data,
2443 control->name, prefix));
2445 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2446 control->name, err);
2455 * snd_soc_add_component_controls - Add an array of controls to a component.
2457 * @component: Component to add controls to
2458 * @controls: Array of controls to add
2459 * @num_controls: Number of elements in the array
2461 * Return: 0 for success, else error.
2463 int snd_soc_add_component_controls(struct snd_soc_component *component,
2464 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2466 struct snd_card *card = component->card->snd_card;
2468 return snd_soc_add_controls(card, component->dev, controls,
2469 num_controls, component->name_prefix, component);
2471 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2474 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2475 * Convenience function to add a list of controls.
2477 * @soc_card: SoC card to add controls to
2478 * @controls: array of controls to add
2479 * @num_controls: number of elements in the array
2481 * Return 0 for success, else error.
2483 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2484 const struct snd_kcontrol_new *controls, int num_controls)
2486 struct snd_card *card = soc_card->snd_card;
2488 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2491 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2494 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2495 * Convenience function to add a list of controls.
2497 * @dai: DAI to add controls to
2498 * @controls: array of controls to add
2499 * @num_controls: number of elements in the array
2501 * Return 0 for success, else error.
2503 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2504 const struct snd_kcontrol_new *controls, int num_controls)
2506 struct snd_card *card = dai->component->card->snd_card;
2508 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2511 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2514 * snd_soc_register_card - Register a card with the ASoC core
2516 * @card: Card to register
2519 int snd_soc_register_card(struct snd_soc_card *card)
2521 if (!card->name || !card->dev)
2524 dev_set_drvdata(card->dev, card);
2526 INIT_LIST_HEAD(&card->widgets);
2527 INIT_LIST_HEAD(&card->paths);
2528 INIT_LIST_HEAD(&card->dapm_list);
2529 INIT_LIST_HEAD(&card->aux_comp_list);
2530 INIT_LIST_HEAD(&card->component_dev_list);
2531 INIT_LIST_HEAD(&card->list);
2532 INIT_LIST_HEAD(&card->rtd_list);
2533 INIT_LIST_HEAD(&card->dapm_dirty);
2534 INIT_LIST_HEAD(&card->dobj_list);
2536 card->instantiated = 0;
2537 mutex_init(&card->mutex);
2538 mutex_init(&card->dapm_mutex);
2539 mutex_init(&card->pcm_mutex);
2541 return snd_soc_bind_card(card);
2543 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2546 * snd_soc_unregister_card - Unregister a card with the ASoC core
2548 * @card: Card to unregister
2551 void snd_soc_unregister_card(struct snd_soc_card *card)
2553 mutex_lock(&client_mutex);
2554 snd_soc_unbind_card(card, true);
2555 mutex_unlock(&client_mutex);
2556 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2558 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2561 * Simplify DAI link configuration by removing ".-1" from device names
2562 * and sanitizing names.
2564 static char *fmt_single_name(struct device *dev, int *id)
2566 const char *devname = dev_name(dev);
2568 unsigned int id1, id2;
2570 if (devname == NULL)
2573 name = devm_kstrdup(dev, devname, GFP_KERNEL);
2577 /* are we a "%s.%d" name (platform and SPI components) */
2578 found = strstr(name, dev->driver->name);
2581 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2583 /* discard ID from name if ID == -1 */
2585 found[strlen(dev->driver->name)] = '\0';
2588 /* I2C component devices are named "bus-addr" */
2589 } else if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2591 /* create unique ID number from I2C addr and bus */
2592 *id = ((id1 & 0xffff) << 16) + id2;
2594 devm_kfree(dev, name);
2596 /* sanitize component name for DAI link creation */
2597 name = devm_kasprintf(dev, GFP_KERNEL, "%s.%s", dev->driver->name, devname);
2606 * Simplify DAI link naming for single devices with multiple DAIs by removing
2607 * any ".-1" and using the DAI name (instead of device name).
2609 static inline char *fmt_multiple_name(struct device *dev,
2610 struct snd_soc_dai_driver *dai_drv)
2612 if (dai_drv->name == NULL) {
2614 "ASoC: error - multiple DAI %s registered with no name\n",
2619 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2622 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2624 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2625 list_del(&dai->list);
2627 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2630 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2632 * @component: The component the DAIs are registered for
2633 * @dai_drv: DAI driver to use for the DAI
2634 * @legacy_dai_naming: if %true, use legacy single-name format;
2635 * if %false, use multiple-name format;
2637 * Topology can use this API to register DAIs when probing a component.
2638 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2639 * will be freed in the component cleanup.
2641 struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2642 struct snd_soc_dai_driver *dai_drv,
2643 bool legacy_dai_naming)
2645 struct device *dev = component->dev;
2646 struct snd_soc_dai *dai;
2648 lockdep_assert_held(&client_mutex);
2650 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2655 * Back in the old days when we still had component-less DAIs,
2656 * instead of having a static name, component-less DAIs would
2657 * inherit the name of the parent device so it is possible to
2658 * register multiple instances of the DAI. We still need to keep
2659 * the same naming style even though those DAIs are not
2660 * component-less anymore.
2662 if (legacy_dai_naming &&
2663 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2664 dai->name = fmt_single_name(dev, &dai->id);
2666 dai->name = fmt_multiple_name(dev, dai_drv);
2668 dai->id = dai_drv->id;
2670 dai->id = component->num_dai;
2675 dai->component = component;
2677 dai->driver = dai_drv;
2679 /* see for_each_component_dais */
2680 list_add_tail(&dai->list, &component->dai_list);
2681 component->num_dai++;
2683 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2686 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2689 * snd_soc_unregister_dais - Unregister DAIs from the ASoC core
2691 * @component: The component for which the DAIs should be unregistered
2693 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2695 struct snd_soc_dai *dai, *_dai;
2697 for_each_component_dais_safe(component, dai, _dai)
2698 snd_soc_unregister_dai(dai);
2702 * snd_soc_register_dais - Register a DAI with the ASoC core
2704 * @component: The component the DAIs are registered for
2705 * @dai_drv: DAI driver to use for the DAIs
2706 * @count: Number of DAIs
2708 static int snd_soc_register_dais(struct snd_soc_component *component,
2709 struct snd_soc_dai_driver *dai_drv,
2712 struct snd_soc_dai *dai;
2716 for (i = 0; i < count; i++) {
2717 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2718 component->driver->legacy_dai_naming);
2728 snd_soc_unregister_dais(component);
2733 #define ENDIANNESS_MAP(name) \
2734 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2735 static u64 endianness_format_map[] = {
2736 ENDIANNESS_MAP(S16_),
2737 ENDIANNESS_MAP(U16_),
2738 ENDIANNESS_MAP(S24_),
2739 ENDIANNESS_MAP(U24_),
2740 ENDIANNESS_MAP(S32_),
2741 ENDIANNESS_MAP(U32_),
2742 ENDIANNESS_MAP(S24_3),
2743 ENDIANNESS_MAP(U24_3),
2744 ENDIANNESS_MAP(S20_3),
2745 ENDIANNESS_MAP(U20_3),
2746 ENDIANNESS_MAP(S18_3),
2747 ENDIANNESS_MAP(U18_3),
2748 ENDIANNESS_MAP(FLOAT_),
2749 ENDIANNESS_MAP(FLOAT64_),
2750 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2754 * Fix up the DAI formats for endianness: codecs don't actually see
2755 * the endianness of the data but we're using the CPU format
2756 * definitions which do need to include endianness so we ensure that
2757 * codec DAIs always have both big and little endian variants set.
2759 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2763 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2764 if (stream->formats & endianness_format_map[i])
2765 stream->formats |= endianness_format_map[i];
2768 static void snd_soc_try_rebind_card(void)
2770 struct snd_soc_card *card, *c;
2772 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2773 if (!snd_soc_bind_card(card))
2774 list_del(&card->list);
2777 static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2779 struct snd_soc_card *card = component->card;
2781 snd_soc_unregister_dais(component);
2784 snd_soc_unbind_card(card, false);
2786 list_del(&component->list);
2789 int snd_soc_component_initialize(struct snd_soc_component *component,
2790 const struct snd_soc_component_driver *driver,
2793 INIT_LIST_HEAD(&component->dai_list);
2794 INIT_LIST_HEAD(&component->dobj_list);
2795 INIT_LIST_HEAD(&component->card_list);
2796 INIT_LIST_HEAD(&component->list);
2797 mutex_init(&component->io_mutex);
2799 component->name = fmt_single_name(dev, &component->id);
2800 if (!component->name) {
2801 dev_err(dev, "ASoC: Failed to allocate name\n");
2805 component->dev = dev;
2806 component->driver = driver;
2808 #ifdef CONFIG_DEBUG_FS
2809 if (!component->debugfs_prefix)
2810 component->debugfs_prefix = driver->debugfs_prefix;
2815 EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
2817 int snd_soc_add_component(struct snd_soc_component *component,
2818 struct snd_soc_dai_driver *dai_drv,
2824 mutex_lock(&client_mutex);
2826 if (component->driver->endianness) {
2827 for (i = 0; i < num_dai; i++) {
2828 convert_endianness_formats(&dai_drv[i].playback);
2829 convert_endianness_formats(&dai_drv[i].capture);
2833 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2835 dev_err(component->dev, "ASoC: Failed to register DAIs: %d\n",
2840 if (!component->driver->write && !component->driver->read) {
2841 if (!component->regmap)
2842 component->regmap = dev_get_regmap(component->dev,
2844 if (component->regmap)
2845 snd_soc_component_setup_regmap(component);
2848 /* see for_each_component */
2849 list_add(&component->list, &component_list);
2853 snd_soc_del_component_unlocked(component);
2855 mutex_unlock(&client_mutex);
2858 snd_soc_try_rebind_card();
2862 EXPORT_SYMBOL_GPL(snd_soc_add_component);
2864 int snd_soc_register_component(struct device *dev,
2865 const struct snd_soc_component_driver *component_driver,
2866 struct snd_soc_dai_driver *dai_drv,
2869 struct snd_soc_component *component;
2872 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2876 ret = snd_soc_component_initialize(component, component_driver, dev);
2880 return snd_soc_add_component(component, dai_drv, num_dai);
2882 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2885 * snd_soc_unregister_component_by_driver - Unregister component using a given driver
2886 * from the ASoC core
2888 * @dev: The device to unregister
2889 * @component_driver: The component driver to unregister
2891 void snd_soc_unregister_component_by_driver(struct device *dev,
2892 const struct snd_soc_component_driver *component_driver)
2894 struct snd_soc_component *component;
2896 if (!component_driver)
2899 mutex_lock(&client_mutex);
2900 component = snd_soc_lookup_component_nolocked(dev, component_driver->name);
2904 snd_soc_del_component_unlocked(component);
2907 mutex_unlock(&client_mutex);
2909 EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
2912 * snd_soc_unregister_component - Unregister all related component
2913 * from the ASoC core
2915 * @dev: The device to unregister
2917 void snd_soc_unregister_component(struct device *dev)
2919 mutex_lock(&client_mutex);
2921 struct snd_soc_component *component = snd_soc_lookup_component_nolocked(dev, NULL);
2926 snd_soc_del_component_unlocked(component);
2928 mutex_unlock(&client_mutex);
2930 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2932 /* Retrieve a card's name from device tree */
2933 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2934 const char *propname)
2936 struct device_node *np;
2940 pr_err("card->dev is not set before calling %s\n", __func__);
2944 np = card->dev->of_node;
2946 ret = of_property_read_string_index(np, propname, 0, &card->name);
2948 * EINVAL means the property does not exist. This is fine providing
2949 * card->name was previously set, which is checked later in
2950 * snd_soc_register_card.
2952 if (ret < 0 && ret != -EINVAL) {
2954 "ASoC: Property '%s' could not be read: %d\n",
2961 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2963 static const struct snd_soc_dapm_widget simple_widgets[] = {
2964 SND_SOC_DAPM_MIC("Microphone", NULL),
2965 SND_SOC_DAPM_LINE("Line", NULL),
2966 SND_SOC_DAPM_HP("Headphone", NULL),
2967 SND_SOC_DAPM_SPK("Speaker", NULL),
2970 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2971 const char *propname)
2973 struct device_node *np = card->dev->of_node;
2974 struct snd_soc_dapm_widget *widgets;
2975 const char *template, *wname;
2976 int i, j, num_widgets;
2978 num_widgets = of_property_count_strings(np, propname);
2979 if (num_widgets < 0) {
2981 "ASoC: Property '%s' does not exist\n", propname);
2985 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2989 if (num_widgets & 1) {
2991 "ASoC: Property '%s' length is not even\n", propname);
2997 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3001 "ASoC: Could not allocate memory for widgets\n");
3005 for (i = 0; i < num_widgets; i++) {
3006 int ret = of_property_read_string_index(np, propname,
3010 "ASoC: Property '%s' index %d read error:%d\n",
3011 propname, 2 * i, ret);
3015 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3016 if (!strncmp(template, simple_widgets[j].name,
3017 strlen(simple_widgets[j].name))) {
3018 widgets[i] = simple_widgets[j];
3023 if (j >= ARRAY_SIZE(simple_widgets)) {
3025 "ASoC: DAPM widget '%s' is not supported\n",
3030 ret = of_property_read_string_index(np, propname,
3035 "ASoC: Property '%s' index %d read error:%d\n",
3036 propname, (2 * i) + 1, ret);
3040 widgets[i].name = wname;
3043 card->of_dapm_widgets = widgets;
3044 card->num_of_dapm_widgets = num_widgets;
3048 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3050 int snd_soc_of_parse_pin_switches(struct snd_soc_card *card, const char *prop)
3052 const unsigned int nb_controls_max = 16;
3053 const char **strings, *control_name;
3054 struct snd_kcontrol_new *controls;
3055 struct device *dev = card->dev;
3056 unsigned int i, nb_controls;
3059 if (!of_property_read_bool(dev->of_node, prop))
3062 strings = devm_kcalloc(dev, nb_controls_max,
3063 sizeof(*strings), GFP_KERNEL);
3067 ret = of_property_read_string_array(dev->of_node, prop,
3068 strings, nb_controls_max);
3072 nb_controls = (unsigned int)ret;
3074 controls = devm_kcalloc(dev, nb_controls,
3075 sizeof(*controls), GFP_KERNEL);
3079 for (i = 0; i < nb_controls; i++) {
3080 control_name = devm_kasprintf(dev, GFP_KERNEL,
3081 "%s Switch", strings[i]);
3085 controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
3086 controls[i].name = control_name;
3087 controls[i].info = snd_soc_dapm_info_pin_switch;
3088 controls[i].get = snd_soc_dapm_get_pin_switch;
3089 controls[i].put = snd_soc_dapm_put_pin_switch;
3090 controls[i].private_value = (unsigned long)strings[i];
3093 card->controls = controls;
3094 card->num_controls = nb_controls;
3098 EXPORT_SYMBOL_GPL(snd_soc_of_parse_pin_switches);
3100 int snd_soc_of_get_slot_mask(struct device_node *np,
3101 const char *prop_name,
3105 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3111 for (i = 0; i < val; i++)
3112 if (be32_to_cpup(&of_slot_mask[i]))
3117 EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
3119 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3120 unsigned int *tx_mask,
3121 unsigned int *rx_mask,
3122 unsigned int *slots,
3123 unsigned int *slot_width)
3129 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3131 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3133 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3134 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3142 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3143 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3153 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3155 void snd_soc_dlc_use_cpu_as_platform(struct snd_soc_dai_link_component *platforms,
3156 struct snd_soc_dai_link_component *cpus)
3158 platforms->of_node = cpus->of_node;
3159 platforms->dai_args = cpus->dai_args;
3161 EXPORT_SYMBOL_GPL(snd_soc_dlc_use_cpu_as_platform);
3163 void snd_soc_of_parse_node_prefix(struct device_node *np,
3164 struct snd_soc_codec_conf *codec_conf,
3165 struct device_node *of_node,
3166 const char *propname)
3171 ret = of_property_read_string(np, propname, &str);
3173 /* no prefix is not error */
3177 codec_conf->dlc.of_node = of_node;
3178 codec_conf->name_prefix = str;
3180 EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
3182 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3183 const char *propname)
3185 struct device_node *np = card->dev->of_node;
3187 struct snd_soc_dapm_route *routes;
3190 num_routes = of_property_count_strings(np, propname);
3191 if (num_routes < 0 || num_routes & 1) {
3193 "ASoC: Property '%s' does not exist or its length is not even\n",
3199 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3203 "ASoC: Could not allocate DAPM route table\n");
3207 for (i = 0; i < num_routes; i++) {
3208 int ret = of_property_read_string_index(np, propname,
3209 2 * i, &routes[i].sink);
3212 "ASoC: Property '%s' index %d could not be read: %d\n",
3213 propname, 2 * i, ret);
3216 ret = of_property_read_string_index(np, propname,
3217 (2 * i) + 1, &routes[i].source);
3220 "ASoC: Property '%s' index %d could not be read: %d\n",
3221 propname, (2 * i) + 1, ret);
3226 card->num_of_dapm_routes = num_routes;
3227 card->of_dapm_routes = routes;
3231 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3233 int snd_soc_of_parse_aux_devs(struct snd_soc_card *card, const char *propname)
3235 struct device_node *node = card->dev->of_node;
3236 struct snd_soc_aux_dev *aux;
3239 num = of_count_phandle_with_args(node, propname, NULL);
3240 if (num == -ENOENT) {
3242 } else if (num < 0) {
3243 dev_err(card->dev, "ASOC: Property '%s' could not be read: %d\n",
3248 aux = devm_kcalloc(card->dev, num, sizeof(*aux), GFP_KERNEL);
3251 card->aux_dev = aux;
3252 card->num_aux_devs = num;
3254 for_each_card_pre_auxs(card, i, aux) {
3255 aux->dlc.of_node = of_parse_phandle(node, propname, i);
3256 if (!aux->dlc.of_node)
3262 EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs);
3264 unsigned int snd_soc_daifmt_clock_provider_flipped(unsigned int dai_fmt)
3266 unsigned int inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
3268 switch (dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
3269 case SND_SOC_DAIFMT_CBP_CFP:
3270 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFC;
3272 case SND_SOC_DAIFMT_CBP_CFC:
3273 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFP;
3275 case SND_SOC_DAIFMT_CBC_CFP:
3276 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFC;
3278 case SND_SOC_DAIFMT_CBC_CFC:
3279 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFP;
3285 EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_flipped);
3287 unsigned int snd_soc_daifmt_clock_provider_from_bitmap(unsigned int bit_frame)
3290 * bit_frame is return value from
3291 * snd_soc_daifmt_parse_clock_provider_raw()
3295 switch (bit_frame) {
3297 return SND_SOC_DAIFMT_CBP_CFP;
3299 return SND_SOC_DAIFMT_CBP_CFC;
3301 return SND_SOC_DAIFMT_CBC_CFP;
3303 return SND_SOC_DAIFMT_CBC_CFC;
3308 EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_from_bitmap);
3310 unsigned int snd_soc_daifmt_parse_format(struct device_node *np,
3315 unsigned int format = 0;
3321 } of_fmt_table[] = {
3322 { "i2s", SND_SOC_DAIFMT_I2S },
3323 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3324 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3325 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3326 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3327 { "ac97", SND_SOC_DAIFMT_AC97 },
3328 { "pdm", SND_SOC_DAIFMT_PDM},
3329 { "msb", SND_SOC_DAIFMT_MSB },
3330 { "lsb", SND_SOC_DAIFMT_LSB },
3337 * check "dai-format = xxx"
3338 * or "[prefix]format = xxx"
3339 * SND_SOC_DAIFMT_FORMAT_MASK area
3341 ret = of_property_read_string(np, "dai-format", &str);
3343 snprintf(prop, sizeof(prop), "%sformat", prefix);
3344 ret = of_property_read_string(np, prop, &str);
3349 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3350 if (strcmp(str, of_fmt_table[i].name) == 0) {
3351 format |= of_fmt_table[i].val;
3358 * check "[prefix]continuous-clock"
3359 * SND_SOC_DAIFMT_CLOCK_MASK area
3361 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3362 if (of_property_read_bool(np, prop))
3363 format |= SND_SOC_DAIFMT_CONT;
3365 format |= SND_SOC_DAIFMT_GATED;
3368 * check "[prefix]bitclock-inversion"
3369 * check "[prefix]frame-inversion"
3370 * SND_SOC_DAIFMT_INV_MASK area
3372 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3373 bit = !!of_get_property(np, prop, NULL);
3375 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3376 frame = !!of_get_property(np, prop, NULL);
3378 switch ((bit << 4) + frame) {
3380 format |= SND_SOC_DAIFMT_IB_IF;
3383 format |= SND_SOC_DAIFMT_IB_NF;
3386 format |= SND_SOC_DAIFMT_NB_IF;
3389 /* SND_SOC_DAIFMT_NB_NF is default */
3395 EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_format);
3397 unsigned int snd_soc_daifmt_parse_clock_provider_raw(struct device_node *np,
3399 struct device_node **bitclkmaster,
3400 struct device_node **framemaster)
3403 unsigned int bit, frame;
3409 * check "[prefix]bitclock-master"
3410 * check "[prefix]frame-master"
3412 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3413 bit = !!of_get_property(np, prop, NULL);
3414 if (bit && bitclkmaster)
3415 *bitclkmaster = of_parse_phandle(np, prop, 0);
3417 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3418 frame = !!of_get_property(np, prop, NULL);
3419 if (frame && framemaster)
3420 *framemaster = of_parse_phandle(np, prop, 0);
3424 * It will be parameter of
3425 * snd_soc_daifmt_clock_provider_from_bitmap()
3427 return (bit << 4) + frame;
3429 EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_clock_provider_raw);
3431 int snd_soc_get_stream_cpu(struct snd_soc_dai_link *dai_link, int stream)
3437 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3438 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3441 * CPU : SNDRV_PCM_STREAM_CAPTURE
3442 * Codec: SNDRV_PCM_STREAM_CAPTURE
3444 if (!dai_link->c2c_params)
3451 * CPU : SNDRV_PCM_STREAM_CAPTURE
3452 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3455 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3456 * Codec: SNDRV_PCM_STREAM_CAPTURE
3458 if (stream == SNDRV_PCM_STREAM_CAPTURE)
3459 return SNDRV_PCM_STREAM_PLAYBACK;
3461 return SNDRV_PCM_STREAM_CAPTURE;
3463 EXPORT_SYMBOL_GPL(snd_soc_get_stream_cpu);
3465 int snd_soc_get_dai_id(struct device_node *ep)
3467 struct snd_soc_component *component;
3468 struct snd_soc_dai_link_component dlc = {
3469 .of_node = of_graph_get_port_parent(ep),
3475 * For example HDMI case, HDMI has video/sound port,
3476 * but ALSA SoC needs sound port number only.
3477 * Thus counting HDMI DT port/endpoint doesn't work.
3478 * Then, it should have .of_xlate_dai_id
3481 mutex_lock(&client_mutex);
3482 component = soc_find_component(&dlc);
3484 ret = snd_soc_component_of_xlate_dai_id(component, ep);
3485 mutex_unlock(&client_mutex);
3487 of_node_put(dlc.of_node);
3491 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3493 int snd_soc_get_dlc(const struct of_phandle_args *args, struct snd_soc_dai_link_component *dlc)
3495 struct snd_soc_component *pos;
3496 int ret = -EPROBE_DEFER;
3498 mutex_lock(&client_mutex);
3499 for_each_component(pos) {
3500 struct device_node *component_of_node = soc_component_to_node(pos);
3502 if (component_of_node != args->np || !pos->num_dai)
3505 ret = snd_soc_component_of_xlate_dai_name(pos, args, &dlc->dai_name);
3506 if (ret == -ENOTSUPP) {
3507 struct snd_soc_dai *dai;
3510 switch (args->args_count) {
3512 id = 0; /* same as dai_drv[0] */
3522 if (id < 0 || id >= pos->num_dai) {
3529 /* find target DAI */
3530 for_each_component_dais(pos, dai) {
3536 dlc->dai_name = snd_soc_dai_name_get(dai);
3539 * if another error than ENOTSUPP is returned go on and
3540 * check if another component is provided with the same
3541 * node. This may happen if a device provides several
3551 dlc->of_node = args->np;
3553 mutex_unlock(&client_mutex);
3556 EXPORT_SYMBOL_GPL(snd_soc_get_dlc);
3558 int snd_soc_of_get_dlc(struct device_node *of_node,
3559 struct of_phandle_args *args,
3560 struct snd_soc_dai_link_component *dlc,
3563 struct of_phandle_args __args;
3569 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3570 "#sound-dai-cells", index, args);
3574 return snd_soc_get_dlc(args, dlc);
3576 EXPORT_SYMBOL_GPL(snd_soc_of_get_dlc);
3578 int snd_soc_get_dai_name(const struct of_phandle_args *args,
3579 const char **dai_name)
3581 struct snd_soc_dai_link_component dlc;
3582 int ret = snd_soc_get_dlc(args, &dlc);
3585 *dai_name = dlc.dai_name;
3589 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3591 int snd_soc_of_get_dai_name(struct device_node *of_node,
3592 const char **dai_name, int index)
3594 struct snd_soc_dai_link_component dlc;
3595 int ret = snd_soc_of_get_dlc(of_node, NULL, &dlc, index);
3598 *dai_name = dlc.dai_name;
3602 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3604 struct snd_soc_dai *snd_soc_get_dai_via_args(const struct of_phandle_args *dai_args)
3606 struct snd_soc_dai *dai;
3607 struct snd_soc_component *component;
3609 mutex_lock(&client_mutex);
3610 for_each_component(component) {
3611 for_each_component_dais(component, dai)
3612 if (snd_soc_is_match_dai_args(dai->driver->dai_args, dai_args))
3617 mutex_unlock(&client_mutex);
3620 EXPORT_SYMBOL_GPL(snd_soc_get_dai_via_args);
3622 static void __snd_soc_of_put_component(struct snd_soc_dai_link_component *component)
3624 if (component->of_node) {
3625 of_node_put(component->of_node);
3626 component->of_node = NULL;
3630 static int __snd_soc_of_get_dai_link_component_alloc(
3631 struct device *dev, struct device_node *of_node,
3632 struct snd_soc_dai_link_component **ret_component,
3635 struct snd_soc_dai_link_component *component;
3638 /* Count the number of CPUs/CODECs */
3639 num = of_count_phandle_with_args(of_node, "sound-dai", "#sound-dai-cells");
3642 dev_err(dev, "No 'sound-dai' property\n");
3644 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3647 component = devm_kcalloc(dev, num, sizeof(*component), GFP_KERNEL);
3651 *ret_component = component;
3658 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3659 * @dai_link: DAI link
3661 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3663 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3665 struct snd_soc_dai_link_component *component;
3668 for_each_link_codecs(dai_link, index, component)
3669 __snd_soc_of_put_component(component);
3671 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3674 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3676 * @of_node: Device node
3677 * @dai_link: DAI link
3679 * Builds an array of CODEC DAI components from the DAI link property
3681 * The array is set in the DAI link and the number of DAIs is set accordingly.
3682 * The device nodes in the array (of_node) must be dereferenced by calling
3683 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3685 * Returns 0 for success
3687 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3688 struct device_node *of_node,
3689 struct snd_soc_dai_link *dai_link)
3691 struct snd_soc_dai_link_component *component;
3694 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3695 &dai_link->codecs, &dai_link->num_codecs);
3699 /* Parse the list */
3700 for_each_link_codecs(dai_link, index, component) {
3701 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3707 snd_soc_of_put_dai_link_codecs(dai_link);
3708 dai_link->codecs = NULL;
3709 dai_link->num_codecs = 0;
3712 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3715 * snd_soc_of_put_dai_link_cpus - Dereference device nodes in the codecs array
3716 * @dai_link: DAI link
3718 * Dereference device nodes acquired by snd_soc_of_get_dai_link_cpus().
3720 void snd_soc_of_put_dai_link_cpus(struct snd_soc_dai_link *dai_link)
3722 struct snd_soc_dai_link_component *component;
3725 for_each_link_cpus(dai_link, index, component)
3726 __snd_soc_of_put_component(component);
3728 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_cpus);
3731 * snd_soc_of_get_dai_link_cpus - Parse a list of CPU DAIs in the devicetree
3733 * @of_node: Device node
3734 * @dai_link: DAI link
3736 * Is analogous to snd_soc_of_get_dai_link_codecs but parses a list of CPU DAIs
3739 * Returns 0 for success
3741 int snd_soc_of_get_dai_link_cpus(struct device *dev,
3742 struct device_node *of_node,
3743 struct snd_soc_dai_link *dai_link)
3745 struct snd_soc_dai_link_component *component;
3748 /* Count the number of CPUs */
3749 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3750 &dai_link->cpus, &dai_link->num_cpus);
3754 /* Parse the list */
3755 for_each_link_cpus(dai_link, index, component) {
3756 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3762 snd_soc_of_put_dai_link_cpus(dai_link);
3763 dai_link->cpus = NULL;
3764 dai_link->num_cpus = 0;
3767 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_cpus);
3769 static int __init snd_soc_init(void)
3773 snd_soc_debugfs_init();
3774 ret = snd_soc_util_init();
3778 ret = platform_driver_register(&soc_driver);
3784 snd_soc_util_exit();
3786 snd_soc_debugfs_exit();
3789 module_init(snd_soc_init);
3791 static void __exit snd_soc_exit(void)
3793 snd_soc_util_exit();
3794 snd_soc_debugfs_exit();
3796 platform_driver_unregister(&soc_driver);
3798 module_exit(snd_soc_exit);
3800 /* Module information */
3801 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3802 MODULE_DESCRIPTION("ALSA SoC Core");
3803 MODULE_LICENSE("GPL");
3804 MODULE_ALIAS("platform:soc-audio");