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 <linux/string_choices.h>
36 #include <sound/core.h>
37 #include <sound/pcm.h>
38 #include <sound/pcm_params.h>
39 #include <sound/soc.h>
40 #include <sound/soc-dpcm.h>
41 #include <sound/soc-topology.h>
42 #include <sound/soc-link.h>
43 #include <sound/initval.h>
45 #define CREATE_TRACE_POINTS
46 #include <trace/events/asoc.h>
48 static DEFINE_MUTEX(client_mutex);
49 static LIST_HEAD(component_list);
50 static LIST_HEAD(unbind_card_list);
52 #define for_each_component(component) \
53 list_for_each_entry(component, &component_list, list)
56 * This is used if driver don't need to have CPU/Codec/Platform
59 struct snd_soc_dai_link_component null_dailink_component[0];
60 EXPORT_SYMBOL_GPL(null_dailink_component);
63 * This is a timeout to do a DAPM powerdown after a stream is closed().
64 * It can be used to eliminate pops between different playback streams, e.g.
65 * between two audio tracks.
67 static int pmdown_time = 5000;
68 module_param(pmdown_time, int, 0);
69 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
71 static ssize_t pmdown_time_show(struct device *dev,
72 struct device_attribute *attr, char *buf)
74 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
76 return sysfs_emit(buf, "%ld\n", rtd->pmdown_time);
79 static ssize_t pmdown_time_store(struct device *dev,
80 struct device_attribute *attr,
81 const char *buf, size_t count)
83 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
86 ret = kstrtol(buf, 10, &rtd->pmdown_time);
93 static DEVICE_ATTR_RW(pmdown_time);
95 static struct attribute *soc_dev_attrs[] = {
96 &dev_attr_pmdown_time.attr,
100 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
101 struct attribute *attr, int idx)
103 struct device *dev = kobj_to_dev(kobj);
104 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
109 if (attr == &dev_attr_pmdown_time.attr)
110 return attr->mode; /* always visible */
111 return rtd->dai_link->num_codecs ? attr->mode : 0; /* enabled only with codec */
114 static const struct attribute_group soc_dapm_dev_group = {
115 .attrs = soc_dapm_dev_attrs,
116 .is_visible = soc_dev_attr_is_visible,
119 static const struct attribute_group soc_dev_group = {
120 .attrs = soc_dev_attrs,
121 .is_visible = soc_dev_attr_is_visible,
124 static const struct attribute_group *soc_dev_attr_groups[] = {
130 #ifdef CONFIG_DEBUG_FS
131 struct dentry *snd_soc_debugfs_root;
132 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
134 static void soc_init_component_debugfs(struct snd_soc_component *component)
136 if (!component->card->debugfs_card_root)
139 if (component->debugfs_prefix) {
142 name = kasprintf(GFP_KERNEL, "%s:%s",
143 component->debugfs_prefix, component->name);
145 component->debugfs_root = debugfs_create_dir(name,
146 component->card->debugfs_card_root);
150 component->debugfs_root = debugfs_create_dir(component->name,
151 component->card->debugfs_card_root);
154 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
155 component->debugfs_root);
158 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
160 if (!component->debugfs_root)
162 debugfs_remove_recursive(component->debugfs_root);
163 component->debugfs_root = NULL;
166 static int dai_list_show(struct seq_file *m, void *v)
168 struct snd_soc_component *component;
169 struct snd_soc_dai *dai;
171 mutex_lock(&client_mutex);
173 for_each_component(component)
174 for_each_component_dais(component, dai)
175 seq_printf(m, "%s\n", dai->name);
177 mutex_unlock(&client_mutex);
181 DEFINE_SHOW_ATTRIBUTE(dai_list);
183 static int component_list_show(struct seq_file *m, void *v)
185 struct snd_soc_component *component;
187 mutex_lock(&client_mutex);
189 for_each_component(component)
190 seq_printf(m, "%s\n", component->name);
192 mutex_unlock(&client_mutex);
196 DEFINE_SHOW_ATTRIBUTE(component_list);
198 static void soc_init_card_debugfs(struct snd_soc_card *card)
200 card->debugfs_card_root = debugfs_create_dir(card->name,
201 snd_soc_debugfs_root);
203 debugfs_create_u32("dapm_pop_time", 0644, card->debugfs_card_root,
206 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
209 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
211 debugfs_remove_recursive(card->debugfs_card_root);
212 card->debugfs_card_root = NULL;
215 static void snd_soc_debugfs_init(void)
217 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
219 debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
222 debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
223 &component_list_fops);
226 static void snd_soc_debugfs_exit(void)
228 debugfs_remove_recursive(snd_soc_debugfs_root);
233 static inline void soc_init_component_debugfs(struct snd_soc_component *component) { }
234 static inline void soc_cleanup_component_debugfs(struct snd_soc_component *component) { }
235 static inline void soc_init_card_debugfs(struct snd_soc_card *card) { }
236 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card) { }
237 static inline void snd_soc_debugfs_init(void) { }
238 static inline void snd_soc_debugfs_exit(void) { }
242 static int snd_soc_is_match_dai_args(const struct of_phandle_args *args1,
243 const struct of_phandle_args *args2)
245 if (!args1 || !args2)
248 if (args1->np != args2->np)
251 for (int i = 0; i < args1->args_count; i++)
252 if (args1->args[i] != args2->args[i])
258 static inline int snd_soc_dlc_component_is_empty(struct snd_soc_dai_link_component *dlc)
260 return !(dlc->dai_args || dlc->name || dlc->of_node);
263 static inline int snd_soc_dlc_component_is_invalid(struct snd_soc_dai_link_component *dlc)
265 return (dlc->name && dlc->of_node);
268 static inline int snd_soc_dlc_dai_is_empty(struct snd_soc_dai_link_component *dlc)
270 return !(dlc->dai_args || dlc->dai_name);
273 static int snd_soc_is_matching_dai(const struct snd_soc_dai_link_component *dlc,
274 struct snd_soc_dai *dai)
280 return snd_soc_is_match_dai_args(dai->driver->dai_args, dlc->dai_args);
285 /* see snd_soc_dai_name_get() */
287 if (dai->driver->name &&
288 strcmp(dlc->dai_name, dai->driver->name) == 0)
291 if (strcmp(dlc->dai_name, dai->name) == 0)
294 if (dai->component->name &&
295 strcmp(dlc->dai_name, dai->component->name) == 0)
301 const char *snd_soc_dai_name_get(const struct snd_soc_dai *dai)
303 /* see snd_soc_is_matching_dai() */
304 if (dai->driver->name)
305 return dai->driver->name;
310 if (dai->component->name)
311 return dai->component->name;
315 EXPORT_SYMBOL_GPL(snd_soc_dai_name_get);
317 static int snd_soc_rtd_add_component(struct snd_soc_pcm_runtime *rtd,
318 struct snd_soc_component *component)
320 struct snd_soc_component *comp;
323 for_each_rtd_components(rtd, i, comp) {
324 /* already connected */
325 if (comp == component)
329 /* see for_each_rtd_components */
330 rtd->num_components++; // increment flex array count at first
331 rtd->components[rtd->num_components - 1] = component;
336 struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
337 const char *driver_name)
339 struct snd_soc_component *component;
348 * snd_soc_rtdcom_lookup() will find component from rtd by using
349 * specified driver name.
350 * But, if many components which have same driver name are connected
351 * to 1 rtd, this function will return 1st found component.
353 for_each_rtd_components(rtd, i, component) {
354 const char *component_name = component->driver->name;
359 if ((component_name == driver_name) ||
360 strcmp(component_name, driver_name) == 0)
366 EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
368 struct snd_soc_component
369 *snd_soc_lookup_component_nolocked(struct device *dev, const char *driver_name)
371 struct snd_soc_component *component;
372 struct snd_soc_component *found_component;
374 found_component = NULL;
375 for_each_component(component) {
376 if ((dev == component->dev) &&
378 (driver_name == component->driver->name) ||
379 (strcmp(component->driver->name, driver_name) == 0))) {
380 found_component = component;
385 return found_component;
387 EXPORT_SYMBOL_GPL(snd_soc_lookup_component_nolocked);
389 struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
390 const char *driver_name)
392 struct snd_soc_component *component;
394 mutex_lock(&client_mutex);
395 component = snd_soc_lookup_component_nolocked(dev, driver_name);
396 mutex_unlock(&client_mutex);
400 EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
402 struct snd_soc_pcm_runtime
403 *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
404 struct snd_soc_dai_link *dai_link)
406 struct snd_soc_pcm_runtime *rtd;
408 for_each_card_rtds(card, rtd) {
409 if (rtd->dai_link == dai_link)
412 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link->name);
415 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
418 * Power down the audio subsystem pmdown_time msecs after close is called.
419 * This is to ensure there are no pops or clicks in between any music tracks
420 * due to DAPM power cycling.
422 void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd)
424 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
425 int playback = SNDRV_PCM_STREAM_PLAYBACK;
427 snd_soc_dpcm_mutex_lock(rtd);
430 "ASoC: pop wq checking: %s status: %s waiting: %s\n",
431 codec_dai->driver->playback.stream_name,
432 snd_soc_dai_stream_active(codec_dai, playback) ?
433 "active" : "inactive",
434 str_yes_no(rtd->pop_wait));
436 /* are we waiting on this codec DAI stream */
437 if (rtd->pop_wait == 1) {
439 snd_soc_dapm_stream_event(rtd, playback,
440 SND_SOC_DAPM_STREAM_STOP);
443 snd_soc_dpcm_mutex_unlock(rtd);
445 EXPORT_SYMBOL_GPL(snd_soc_close_delayed_work);
447 static void soc_release_rtd_dev(struct device *dev)
449 /* "dev" means "rtd->dev" */
453 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
458 list_del(&rtd->list);
460 if (delayed_work_pending(&rtd->delayed_work))
461 flush_delayed_work(&rtd->delayed_work);
462 snd_soc_pcm_component_free(rtd);
465 * we don't need to call kfree() for rtd->dev
467 * soc_release_rtd_dev()
469 * We don't need rtd->dev NULL check, because
470 * it is alloced *before* rtd.
472 * soc_new_pcm_runtime()
474 * We don't need to mind freeing for rtd,
475 * because it was created from dev (= rtd->dev)
477 * soc_new_pcm_runtime()
479 * rtd = devm_kzalloc(dev, ...);
482 device_unregister(rtd->dev);
485 static void close_delayed_work(struct work_struct *work) {
486 struct snd_soc_pcm_runtime *rtd =
487 container_of(work, struct snd_soc_pcm_runtime,
490 if (rtd->close_delayed_work_func)
491 rtd->close_delayed_work_func(rtd);
494 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
495 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
497 struct snd_soc_pcm_runtime *rtd;
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,
524 struct_size(rtd, components,
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->id = 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);
1230 * Most drivers will register their PCMs using DAI link ordering but
1231 * topology based drivers can use the DAI link id field to set PCM
1232 * device number and then use rtd + a base offset of the BEs.
1236 * This should be implemented by using "dai_link" feature instead of
1237 * "component" feature.
1240 for_each_rtd_components(rtd, i, component) {
1241 if (!component->driver->use_dai_pcm_id)
1244 if (rtd->dai_link->no_pcm)
1245 id += component->driver->be_pcm_base;
1247 id = rtd->dai_link->id;
1254 snd_soc_remove_pcm_runtime(card, rtd);
1255 return -EPROBE_DEFER;
1258 int snd_soc_add_pcm_runtimes(struct snd_soc_card *card,
1259 struct snd_soc_dai_link *dai_link,
1262 for (int i = 0; i < num_dai_link; i++) {
1265 ret = snd_soc_compensate_channel_connection_map(card, dai_link + i);
1269 ret = snd_soc_add_pcm_runtime(card, dai_link + i);
1276 EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtimes);
1278 static void snd_soc_runtime_get_dai_fmt(struct snd_soc_pcm_runtime *rtd)
1280 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1281 struct snd_soc_dai *dai, *not_used;
1282 u64 pos, possible_fmt;
1283 unsigned int mask = 0, dai_fmt = 0;
1284 int i, j, priority, pri, until;
1287 * Get selectable format from each DAIs.
1289 ****************************
1291 * Using .auto_selectable_formats is not mandatory,
1292 * we can select format manually from Sound Card.
1293 * When use it, driver should list well tested format only.
1294 ****************************
1297 * auto_selectable_formats (= SND_SOC_POSSIBLE_xxx)
1299 * DAI0_: { 0x000F, 0x00F0, 0x0F00 };
1300 * DAI1 : { 0xF000, 0x0F00 };
1303 * "until" will be 3 in this case (MAX array size from DAI0 and DAI1)
1304 * Here is dev_dbg() message and comments
1307 * DAI0: (pri, fmt) = (1, 000000000000000F) // 1st check (A) DAI1 is not selected
1308 * DAI1: (pri, fmt) = (0, 0000000000000000) // Necessary Waste
1309 * DAI0: (pri, fmt) = (1, 000000000000000F) // 2nd check (A)
1310 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1312 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 3rd check (A) + (B)
1313 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1314 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 4th check (A) + (B)
1315 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1317 * DAI0: (pri, fmt) = (3, 0000000000000FFF) // 5th check (A) + (B) + (C)
1318 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1319 * found auto selected format: 0000000000000F00
1321 until = snd_soc_dai_get_fmt_max_priority(rtd);
1322 for (priority = 1; priority <= until; priority++) {
1323 for_each_rtd_dais(rtd, j, not_used) {
1325 possible_fmt = ULLONG_MAX;
1326 for_each_rtd_dais(rtd, i, dai) {
1329 pri = (j >= i) ? priority : priority - 1;
1330 fmt = snd_soc_dai_get_fmt(dai, pri);
1331 possible_fmt &= fmt;
1341 * convert POSSIBLE_DAIFMT to DAIFMT
1343 * Some basic/default settings on each is defined as 0.
1345 * SND_SOC_DAIFMT_NB_NF
1346 * SND_SOC_DAIFMT_GATED
1348 * SND_SOC_DAIFMT_xxx_MASK can't notice it if Sound Card specify
1349 * these value, and will be overwrite to auto selected value.
1351 * To avoid such issue, loop from 63 to 0 here.
1352 * Small number of SND_SOC_POSSIBLE_xxx will be Hi priority.
1353 * Basic/Default settings of each part and above are defined
1354 * as Hi priority (= small number) of SND_SOC_POSSIBLE_xxx.
1356 for (i = 63; i >= 0; i--) {
1358 switch (possible_fmt & pos) {
1362 case SND_SOC_POSSIBLE_DAIFMT_I2S:
1363 case SND_SOC_POSSIBLE_DAIFMT_RIGHT_J:
1364 case SND_SOC_POSSIBLE_DAIFMT_LEFT_J:
1365 case SND_SOC_POSSIBLE_DAIFMT_DSP_A:
1366 case SND_SOC_POSSIBLE_DAIFMT_DSP_B:
1367 case SND_SOC_POSSIBLE_DAIFMT_AC97:
1368 case SND_SOC_POSSIBLE_DAIFMT_PDM:
1369 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_FORMAT_MASK) | i;
1374 case SND_SOC_POSSIBLE_DAIFMT_CONT:
1375 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_CONT;
1377 case SND_SOC_POSSIBLE_DAIFMT_GATED:
1378 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) | SND_SOC_DAIFMT_GATED;
1383 case SND_SOC_POSSIBLE_DAIFMT_NB_NF:
1384 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_NF;
1386 case SND_SOC_POSSIBLE_DAIFMT_NB_IF:
1387 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_NB_IF;
1389 case SND_SOC_POSSIBLE_DAIFMT_IB_NF:
1390 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_NF;
1392 case SND_SOC_POSSIBLE_DAIFMT_IB_IF:
1393 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_INV_MASK) | SND_SOC_DAIFMT_IB_IF;
1396 * for clock provider / consumer
1398 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFP:
1399 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFP;
1401 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFP:
1402 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFP;
1404 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFC:
1405 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBP_CFC;
1407 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFC:
1408 dai_fmt = (dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) | SND_SOC_DAIFMT_CBC_CFC;
1414 * Some driver might have very complex limitation.
1415 * In such case, user want to auto-select non-limitation part,
1416 * and want to manually specify complex part.
1418 * Or for example, if both CPU and Codec can be clock provider,
1419 * but because of its quality, user want to specify it manually.
1421 * Use manually specified settings if sound card did.
1423 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK))
1424 mask |= SND_SOC_DAIFMT_FORMAT_MASK;
1425 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_MASK))
1426 mask |= SND_SOC_DAIFMT_CLOCK_MASK;
1427 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_INV_MASK))
1428 mask |= SND_SOC_DAIFMT_INV_MASK;
1429 if (!(dai_link->dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK))
1430 mask |= SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
1432 dai_link->dai_fmt |= (dai_fmt & mask);
1436 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1437 * @rtd: The runtime for which the DAI link format should be changed
1438 * @dai_fmt: The new DAI link format
1440 * This function updates the DAI link format for all DAIs connected to the DAI
1441 * link for the specified runtime.
1443 * Note: For setups with a static format set the dai_fmt field in the
1444 * corresponding snd_dai_link struct instead of using this function.
1446 * Returns 0 on success, otherwise a negative error code.
1448 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1449 unsigned int dai_fmt)
1451 struct snd_soc_dai *cpu_dai;
1452 struct snd_soc_dai *codec_dai;
1453 unsigned int ext_fmt;
1461 * dai_fmt has 4 types
1462 * 1. SND_SOC_DAIFMT_FORMAT_MASK
1463 * 2. SND_SOC_DAIFMT_CLOCK
1464 * 3. SND_SOC_DAIFMT_INV
1465 * 4. SND_SOC_DAIFMT_CLOCK_PROVIDER
1467 * 4. CLOCK_PROVIDER is set from Codec perspective in dai_fmt. So it will be flipped
1468 * when this function calls set_fmt() for CPU (CBx_CFx -> Bx_Cx). see below.
1469 * This mean, we can't set CPU/Codec both are clock consumer for example.
1470 * New idea handles 4. in each dai->ext_fmt. It can keep compatibility.
1473 * dai_fmt includes 1, 2, 3, 4
1476 * dai_fmt includes 1, 2, 3
1477 * ext_fmt includes 4
1479 for_each_rtd_codec_dais(rtd, i, codec_dai) {
1480 ext_fmt = rtd->dai_link->codecs[i].ext_fmt;
1481 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt | ext_fmt);
1482 if (ret != 0 && ret != -ENOTSUPP)
1486 /* Flip the polarity for the "CPU" end of link */
1487 /* Will effect only for 4. SND_SOC_DAIFMT_CLOCK_PROVIDER */
1488 dai_fmt = snd_soc_daifmt_clock_provider_flipped(dai_fmt);
1490 for_each_rtd_cpu_dais(rtd, i, cpu_dai) {
1491 ext_fmt = rtd->dai_link->cpus[i].ext_fmt;
1492 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt | ext_fmt);
1493 if (ret != 0 && ret != -ENOTSUPP)
1499 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1501 static int soc_init_pcm_runtime(struct snd_soc_card *card,
1502 struct snd_soc_pcm_runtime *rtd)
1504 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1505 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
1508 /* do machine specific initialization */
1509 ret = snd_soc_link_init(rtd);
1513 snd_soc_runtime_get_dai_fmt(rtd);
1514 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1518 /* add DPCM sysfs entries */
1519 soc_dpcm_debugfs_add(rtd);
1521 /* create compress_device if possible */
1522 ret = snd_soc_dai_compress_new(cpu_dai, rtd);
1523 if (ret != -ENOTSUPP)
1526 /* create the pcm */
1527 ret = soc_new_pcm(rtd);
1529 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1530 dai_link->stream_name, ret);
1534 ret = snd_soc_pcm_dai_new(rtd);
1538 rtd->initialized = true;
1542 snd_soc_link_exit(rtd);
1546 static void soc_set_name_prefix(struct snd_soc_card *card,
1547 struct snd_soc_component *component)
1549 struct device_node *of_node = soc_component_to_node(component);
1553 for (i = 0; i < card->num_configs; i++) {
1554 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1556 if (snd_soc_is_matching_component(&map->dlc, component) &&
1558 component->name_prefix = map->name_prefix;
1564 * If there is no configuration table or no match in the table,
1565 * check if a prefix is provided in the node
1567 ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1571 component->name_prefix = str;
1574 static void soc_remove_component(struct snd_soc_component *component,
1578 if (!component->card)
1582 snd_soc_component_remove(component);
1584 list_del_init(&component->card_list);
1585 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1586 soc_cleanup_component_debugfs(component);
1587 component->card = NULL;
1588 snd_soc_component_module_put_when_remove(component);
1591 static int soc_probe_component(struct snd_soc_card *card,
1592 struct snd_soc_component *component)
1594 struct snd_soc_dapm_context *dapm =
1595 snd_soc_component_get_dapm(component);
1596 struct snd_soc_dai *dai;
1600 if (snd_soc_component_is_dummy(component))
1603 if (component->card) {
1604 if (component->card != card) {
1605 dev_err(component->dev,
1606 "Trying to bind component \"%s\" to card \"%s\" but is already bound to card \"%s\"\n",
1607 component->name, card->name, component->card->name);
1613 ret = snd_soc_component_module_get_when_probe(component);
1617 component->card = card;
1618 soc_set_name_prefix(card, component);
1620 soc_init_component_debugfs(component);
1622 snd_soc_dapm_init(dapm, card, component);
1624 ret = snd_soc_dapm_new_controls(dapm,
1625 component->driver->dapm_widgets,
1626 component->driver->num_dapm_widgets);
1629 dev_err(component->dev,
1630 "Failed to create new controls %d\n", ret);
1634 for_each_component_dais(component, dai) {
1635 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1637 dev_err(component->dev,
1638 "Failed to create DAI widgets %d\n", ret);
1643 ret = snd_soc_component_probe(component);
1647 WARN(dapm->idle_bias_off &&
1648 dapm->bias_level != SND_SOC_BIAS_OFF,
1649 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1654 * machine specific init
1656 * snd_soc_component_set_aux()
1658 ret = snd_soc_component_init(component);
1662 ret = snd_soc_add_component_controls(component,
1663 component->driver->controls,
1664 component->driver->num_controls);
1668 ret = snd_soc_dapm_add_routes(dapm,
1669 component->driver->dapm_routes,
1670 component->driver->num_dapm_routes);
1674 /* see for_each_card_components */
1675 list_add(&component->card_list, &card->component_dev_list);
1679 soc_remove_component(component, probed);
1684 static void soc_remove_link_dais(struct snd_soc_card *card)
1686 struct snd_soc_pcm_runtime *rtd;
1689 for_each_comp_order(order) {
1690 for_each_card_rtds(card, rtd) {
1691 /* remove all rtd connected DAIs in good order */
1692 snd_soc_pcm_dai_remove(rtd, order);
1697 static int soc_probe_link_dais(struct snd_soc_card *card)
1699 struct snd_soc_pcm_runtime *rtd;
1702 for_each_comp_order(order) {
1703 for_each_card_rtds(card, rtd) {
1704 /* probe all rtd connected DAIs in good order */
1705 ret = snd_soc_pcm_dai_probe(rtd, order);
1714 static void soc_remove_link_components(struct snd_soc_card *card)
1716 struct snd_soc_component *component;
1717 struct snd_soc_pcm_runtime *rtd;
1720 for_each_comp_order(order) {
1721 for_each_card_rtds(card, rtd) {
1722 for_each_rtd_components(rtd, i, component) {
1723 if (component->driver->remove_order != order)
1726 soc_remove_component(component, 1);
1732 static int soc_probe_link_components(struct snd_soc_card *card)
1734 struct snd_soc_component *component;
1735 struct snd_soc_pcm_runtime *rtd;
1738 for_each_comp_order(order) {
1739 for_each_card_rtds(card, rtd) {
1740 for_each_rtd_components(rtd, i, component) {
1741 if (component->driver->probe_order != order)
1744 ret = soc_probe_component(card, component);
1754 static void soc_unbind_aux_dev(struct snd_soc_card *card)
1756 struct snd_soc_component *component, *_component;
1758 for_each_card_auxs_safe(card, component, _component) {
1759 /* for snd_soc_component_init() */
1760 snd_soc_component_set_aux(component, NULL);
1761 list_del(&component->card_aux_list);
1765 static int soc_bind_aux_dev(struct snd_soc_card *card)
1767 struct snd_soc_component *component;
1768 struct snd_soc_aux_dev *aux;
1771 for_each_card_pre_auxs(card, i, aux) {
1772 /* codecs, usually analog devices */
1773 component = soc_find_component(&aux->dlc);
1775 return -EPROBE_DEFER;
1777 /* for snd_soc_component_init() */
1778 snd_soc_component_set_aux(component, aux);
1779 /* see for_each_card_auxs */
1780 list_add(&component->card_aux_list, &card->aux_comp_list);
1785 static int soc_probe_aux_devices(struct snd_soc_card *card)
1787 struct snd_soc_component *component;
1791 for_each_comp_order(order) {
1792 for_each_card_auxs(card, component) {
1793 if (component->driver->probe_order != order)
1796 ret = soc_probe_component(card, component);
1805 static void soc_remove_aux_devices(struct snd_soc_card *card)
1807 struct snd_soc_component *comp, *_comp;
1810 for_each_comp_order(order) {
1811 for_each_card_auxs_safe(card, comp, _comp) {
1812 if (comp->driver->remove_order == order)
1813 soc_remove_component(comp, 1);
1820 * If a DMI filed contain strings in this blacklist (e.g.
1821 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
1822 * as invalid and dropped when setting the card long name from DMI info.
1824 static const char * const dmi_blacklist[] = {
1825 "To be filled by OEM",
1828 "Board Manufacturer",
1829 "Board Vendor Name",
1830 "Board Product Name",
1831 NULL, /* terminator */
1835 * Trim special characters, and replace '-' with '_' since '-' is used to
1836 * separate different DMI fields in the card long name. Only number and
1837 * alphabet characters and a few separator characters are kept.
1839 static void cleanup_dmi_name(char *name)
1843 for (i = 0; name[i]; i++) {
1844 if (isalnum(name[i]) || (name[i] == '.')
1845 || (name[i] == '_'))
1846 name[j++] = name[i];
1847 else if (name[i] == '-')
1855 * Check if a DMI field is valid, i.e. not containing any string
1856 * in the black list.
1858 static int is_dmi_valid(const char *field)
1862 while (dmi_blacklist[i]) {
1863 if (strstr(field, dmi_blacklist[i]))
1872 * Append a string to card->dmi_longname with character cleanups.
1874 static void append_dmi_string(struct snd_soc_card *card, const char *str)
1876 char *dst = card->dmi_longname;
1877 size_t dst_len = sizeof(card->dmi_longname);
1881 snprintf(dst + len, dst_len - len, "-%s", str);
1883 len++; /* skip the separator "-" */
1885 cleanup_dmi_name(dst + len);
1889 * snd_soc_set_dmi_name() - Register DMI names to card
1890 * @card: The card to register DMI names
1892 * An Intel machine driver may be used by many different devices but are
1893 * difficult for userspace to differentiate, since machine drivers usually
1894 * use their own name as the card short name and leave the card long name
1895 * blank. To differentiate such devices and fix bugs due to lack of
1896 * device-specific configurations, this function allows DMI info to be used
1897 * as the sound card long name, in the format of
1898 * "vendor-product-version-board"
1899 * (Character '-' is used to separate different DMI fields here).
1900 * This will help the user space to load the device-specific Use Case Manager
1901 * (UCM) configurations for the card.
1903 * Possible card long names may be:
1904 * DellInc.-XPS139343-01-0310JH
1905 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1906 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1908 * This function also supports flavoring the card longname to provide
1909 * the extra differentiation, like "vendor-product-version-board-flavor".
1911 * We only keep number and alphabet characters and a few separator characters
1912 * in the card long name since UCM in the user space uses the card long names
1913 * as card configuration directory names and AudoConf cannot support special
1914 * characters like SPACE.
1916 * Returns 0 on success, otherwise a negative error code.
1918 static int snd_soc_set_dmi_name(struct snd_soc_card *card)
1920 const char *vendor, *product, *board;
1922 if (card->long_name)
1923 return 0; /* long name already set by driver or from DMI */
1928 /* make up dmi long name as: vendor-product-version-board */
1929 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1930 if (!vendor || !is_dmi_valid(vendor)) {
1931 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1935 snprintf(card->dmi_longname, sizeof(card->dmi_longname), "%s", vendor);
1936 cleanup_dmi_name(card->dmi_longname);
1938 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1939 if (product && is_dmi_valid(product)) {
1940 const char *product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1942 append_dmi_string(card, product);
1945 * some vendors like Lenovo may only put a self-explanatory
1946 * name in the product version field
1948 if (product_version && is_dmi_valid(product_version))
1949 append_dmi_string(card, product_version);
1952 board = dmi_get_system_info(DMI_BOARD_NAME);
1953 if (board && is_dmi_valid(board)) {
1954 if (!product || strcasecmp(board, product))
1955 append_dmi_string(card, board);
1956 } else if (!product) {
1957 /* fall back to using legacy name */
1958 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1962 /* set the card long name */
1963 card->long_name = card->dmi_longname;
1968 static inline int snd_soc_set_dmi_name(struct snd_soc_card *card)
1972 #endif /* CONFIG_DMI */
1974 static void soc_check_tplg_fes(struct snd_soc_card *card)
1976 struct snd_soc_component *component;
1977 const struct snd_soc_component_driver *comp_drv;
1978 struct snd_soc_dai_link *dai_link;
1981 for_each_component(component) {
1983 /* does this component override BEs ? */
1984 if (!component->driver->ignore_machine)
1987 /* for this machine ? */
1988 if (!strcmp(component->driver->ignore_machine,
1989 card->dev->driver->name))
1991 if (strcmp(component->driver->ignore_machine,
1992 dev_name(card->dev)))
1995 /* machine matches, so override the rtd data */
1996 for_each_card_prelinks(card, i, dai_link) {
1998 /* ignore this FE */
1999 if (dai_link->dynamic) {
2000 dai_link->ignore = true;
2004 dev_dbg(card->dev, "info: override BE DAI link %s\n",
2005 card->dai_link[i].name);
2007 /* override platform component */
2008 if (!dai_link->platforms) {
2009 dev_err(card->dev, "init platform error");
2013 if (component->dev->of_node)
2014 dai_link->platforms->of_node = component->dev->of_node;
2016 dai_link->platforms->name = component->name;
2018 /* convert non BE into BE */
2019 dai_link->no_pcm = 1;
2022 * override any BE fixups
2024 * snd_soc_link_be_hw_params_fixup()
2026 dai_link->be_hw_params_fixup =
2027 component->driver->be_hw_params_fixup;
2030 * most BE links don't set stream name, so set it to
2031 * dai link name if it's NULL to help bind widgets.
2033 if (!dai_link->stream_name)
2034 dai_link->stream_name = dai_link->name;
2037 /* Inform userspace we are using alternate topology */
2038 if (component->driver->topology_name_prefix) {
2040 /* topology shortname created? */
2041 if (!card->topology_shortname_created) {
2042 comp_drv = component->driver;
2044 snprintf(card->topology_shortname, 32, "%s-%s",
2045 comp_drv->topology_name_prefix,
2047 card->topology_shortname_created = true;
2050 /* use topology shortname */
2051 card->name = card->topology_shortname;
2056 #define soc_setup_card_name(card, name, name1, name2) \
2057 __soc_setup_card_name(card, name, sizeof(name), name1, name2)
2058 static void __soc_setup_card_name(struct snd_soc_card *card,
2059 char *name, int len,
2060 const char *name1, const char *name2)
2062 const char *src = name1 ? name1 : name2;
2065 snprintf(name, len, "%s", src);
2067 if (name != card->snd_card->driver)
2071 * Name normalization (driver field)
2073 * The driver name is somewhat special, as it's used as a key for
2074 * searches in the user-space.
2077 * "abcd??efg" -> "abcd__efg"
2079 for (i = 0; i < len; i++) {
2086 if (!isalnum(name[i]))
2093 * The driver field should contain a valid string from the user view.
2094 * The wrapping usually does not work so well here. Set a smaller string
2095 * in the specific ASoC driver.
2097 if (strlen(src) > len - 1)
2098 dev_err(card->dev, "ASoC: driver name too long '%s' -> '%s'\n", src, name);
2101 static void soc_cleanup_card_resources(struct snd_soc_card *card)
2103 struct snd_soc_pcm_runtime *rtd, *n;
2106 snd_card_disconnect_sync(card->snd_card);
2108 snd_soc_dapm_shutdown(card);
2110 /* release machine specific resources */
2111 for_each_card_rtds(card, rtd)
2112 if (rtd->initialized)
2113 snd_soc_link_exit(rtd);
2114 /* remove and free each DAI */
2115 soc_remove_link_dais(card);
2116 soc_remove_link_components(card);
2118 for_each_card_rtds_safe(card, rtd, n)
2119 snd_soc_remove_pcm_runtime(card, rtd);
2121 /* remove auxiliary devices */
2122 soc_remove_aux_devices(card);
2123 soc_unbind_aux_dev(card);
2125 snd_soc_dapm_free(&card->dapm);
2126 soc_cleanup_card_debugfs(card);
2128 /* remove the card */
2129 snd_soc_card_remove(card);
2131 if (card->snd_card) {
2132 snd_card_free(card->snd_card);
2133 card->snd_card = NULL;
2137 static void snd_soc_unbind_card(struct snd_soc_card *card)
2139 if (snd_soc_card_is_instantiated(card)) {
2140 card->instantiated = false;
2141 snd_soc_flush_all_delayed_work(card);
2143 soc_cleanup_card_resources(card);
2147 static int snd_soc_bind_card(struct snd_soc_card *card)
2149 struct snd_soc_pcm_runtime *rtd;
2150 struct snd_soc_component *component;
2153 snd_soc_card_mutex_lock_root(card);
2154 snd_soc_fill_dummy_dai(card);
2156 snd_soc_dapm_init(&card->dapm, card, NULL);
2158 /* check whether any platform is ignore machine FE and using topology */
2159 soc_check_tplg_fes(card);
2161 /* bind aux_devs too */
2162 ret = soc_bind_aux_dev(card);
2166 /* add predefined DAI links to the list */
2168 ret = snd_soc_add_pcm_runtimes(card, card->dai_link, card->num_links);
2172 /* card bind complete so register a sound card */
2173 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2174 card->owner, 0, &card->snd_card);
2177 "ASoC: can't create sound card for card %s: %d\n",
2182 soc_init_card_debugfs(card);
2184 soc_resume_init(card);
2186 ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2187 card->num_dapm_widgets);
2191 ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2192 card->num_of_dapm_widgets);
2196 /* initialise the sound card only once */
2197 ret = snd_soc_card_probe(card);
2201 /* probe all components used by DAI links on this card */
2202 ret = soc_probe_link_components(card);
2204 if (ret != -EPROBE_DEFER) {
2206 "ASoC: failed to instantiate card %d\n", ret);
2211 /* probe auxiliary components */
2212 ret = soc_probe_aux_devices(card);
2215 "ASoC: failed to probe aux component %d\n", ret);
2219 /* probe all DAI links on this card */
2220 ret = soc_probe_link_dais(card);
2223 "ASoC: failed to instantiate card %d\n", ret);
2227 for_each_card_rtds(card, rtd) {
2228 ret = soc_init_pcm_runtime(card, rtd);
2233 snd_soc_dapm_link_dai_widgets(card);
2234 snd_soc_dapm_connect_dai_link_widgets(card);
2236 ret = snd_soc_add_card_controls(card, card->controls,
2237 card->num_controls);
2241 ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2242 card->num_dapm_routes);
2246 ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2247 card->num_of_dapm_routes);
2251 /* try to set some sane longname if DMI is available */
2252 snd_soc_set_dmi_name(card);
2254 soc_setup_card_name(card, card->snd_card->shortname,
2256 soc_setup_card_name(card, card->snd_card->longname,
2257 card->long_name, card->name);
2258 soc_setup_card_name(card, card->snd_card->driver,
2259 card->driver_name, card->name);
2261 if (card->components) {
2262 /* the current implementation of snd_component_add() accepts */
2263 /* multiple components in the string separated by space, */
2264 /* but the string collision (identical string) check might */
2265 /* not work correctly */
2266 ret = snd_component_add(card->snd_card, card->components);
2268 dev_err(card->dev, "ASoC: %s snd_component_add() failed: %d\n",
2274 ret = snd_soc_card_late_probe(card);
2278 snd_soc_dapm_new_widgets(card);
2279 snd_soc_card_fixup_controls(card);
2281 ret = snd_card_register(card->snd_card);
2283 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2288 card->instantiated = 1;
2289 dapm_mark_endpoints_dirty(card);
2290 snd_soc_dapm_sync(&card->dapm);
2292 /* deactivate pins to sleep state */
2293 for_each_card_components(card, component)
2294 if (!snd_soc_component_active(component))
2295 pinctrl_pm_select_sleep_state(component->dev);
2299 soc_cleanup_card_resources(card);
2300 snd_soc_card_mutex_unlock(card);
2305 static void devm_card_bind_release(struct device *dev, void *res)
2307 snd_soc_unregister_card(*(struct snd_soc_card **)res);
2310 static int devm_snd_soc_bind_card(struct device *dev, struct snd_soc_card *card)
2312 struct snd_soc_card **ptr;
2315 ptr = devres_alloc(devm_card_bind_release, sizeof(*ptr), GFP_KERNEL);
2319 ret = snd_soc_bind_card(card);
2320 if (ret == 0 || ret == -EPROBE_DEFER) {
2322 devres_add(dev, ptr);
2330 static int snd_soc_rebind_card(struct snd_soc_card *card)
2334 if (card->devres_dev) {
2335 devres_destroy(card->devres_dev, devm_card_bind_release, NULL, NULL);
2336 ret = devm_snd_soc_bind_card(card->devres_dev, card);
2338 ret = snd_soc_bind_card(card);
2341 if (ret != -EPROBE_DEFER)
2342 list_del_init(&card->list);
2347 /* probes a new socdev */
2348 static int soc_probe(struct platform_device *pdev)
2350 struct snd_soc_card *card = platform_get_drvdata(pdev);
2353 * no card, so machine driver should be registering card
2354 * we should not be here in that case so ret error
2359 dev_warn(&pdev->dev,
2360 "ASoC: machine %s should use snd_soc_register_card()\n",
2363 /* Bodge while we unpick instantiation */
2364 card->dev = &pdev->dev;
2366 return devm_snd_soc_register_card(&pdev->dev, card);
2369 int snd_soc_poweroff(struct device *dev)
2371 struct snd_soc_card *card = dev_get_drvdata(dev);
2372 struct snd_soc_component *component;
2374 if (!snd_soc_card_is_instantiated(card))
2378 * Flush out pmdown_time work - we actually do want to run it
2379 * now, we're shutting down so no imminent restart.
2381 snd_soc_flush_all_delayed_work(card);
2383 snd_soc_dapm_shutdown(card);
2385 /* deactivate pins to sleep state */
2386 for_each_card_components(card, component)
2387 pinctrl_pm_select_sleep_state(component->dev);
2391 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2393 const struct dev_pm_ops snd_soc_pm_ops = {
2394 .suspend = snd_soc_suspend,
2395 .resume = snd_soc_resume,
2396 .freeze = snd_soc_suspend,
2397 .thaw = snd_soc_resume,
2398 .poweroff = snd_soc_poweroff,
2399 .restore = snd_soc_resume,
2401 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2403 /* ASoC platform driver */
2404 static struct platform_driver soc_driver = {
2406 .name = "soc-audio",
2407 .pm = &snd_soc_pm_ops,
2413 * snd_soc_cnew - create new control
2414 * @_template: control template
2415 * @data: control private data
2416 * @long_name: control long name
2417 * @prefix: control name prefix
2419 * Create a new mixer control from a template control.
2421 * Returns 0 for success, else error.
2423 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2424 void *data, const char *long_name,
2427 struct snd_kcontrol_new template;
2428 struct snd_kcontrol *kcontrol;
2431 memcpy(&template, _template, sizeof(template));
2435 long_name = template.name;
2438 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2442 template.name = name;
2444 template.name = long_name;
2447 kcontrol = snd_ctl_new1(&template, data);
2453 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2455 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2456 const struct snd_kcontrol_new *controls, int num_controls,
2457 const char *prefix, void *data)
2461 for (i = 0; i < num_controls; i++) {
2462 const struct snd_kcontrol_new *control = &controls[i];
2463 int err = snd_ctl_add(card, snd_soc_cnew(control, data,
2464 control->name, prefix));
2466 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2467 control->name, err);
2476 * snd_soc_add_component_controls - Add an array of controls to a component.
2478 * @component: Component to add controls to
2479 * @controls: Array of controls to add
2480 * @num_controls: Number of elements in the array
2482 * Return: 0 for success, else error.
2484 int snd_soc_add_component_controls(struct snd_soc_component *component,
2485 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2487 struct snd_card *card = component->card->snd_card;
2489 return snd_soc_add_controls(card, component->dev, controls,
2490 num_controls, component->name_prefix, component);
2492 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2495 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2496 * Convenience function to add a list of controls.
2498 * @soc_card: SoC card to add controls to
2499 * @controls: array of controls to add
2500 * @num_controls: number of elements in the array
2502 * Return 0 for success, else error.
2504 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2505 const struct snd_kcontrol_new *controls, int num_controls)
2507 struct snd_card *card = soc_card->snd_card;
2509 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2512 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2515 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2516 * Convenience function to add a list of controls.
2518 * @dai: DAI to add controls to
2519 * @controls: array of controls to add
2520 * @num_controls: number of elements in the array
2522 * Return 0 for success, else error.
2524 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2525 const struct snd_kcontrol_new *controls, int num_controls)
2527 struct snd_card *card = dai->component->card->snd_card;
2529 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2532 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2535 * snd_soc_register_card - Register a card with the ASoC core
2537 * @card: Card to register
2540 int snd_soc_register_card(struct snd_soc_card *card)
2544 if (!card->name || !card->dev)
2547 dev_set_drvdata(card->dev, card);
2549 INIT_LIST_HEAD(&card->widgets);
2550 INIT_LIST_HEAD(&card->paths);
2551 INIT_LIST_HEAD(&card->dapm_list);
2552 INIT_LIST_HEAD(&card->aux_comp_list);
2553 INIT_LIST_HEAD(&card->component_dev_list);
2554 INIT_LIST_HEAD(&card->list);
2555 INIT_LIST_HEAD(&card->rtd_list);
2556 INIT_LIST_HEAD(&card->dapm_dirty);
2557 INIT_LIST_HEAD(&card->dobj_list);
2559 card->instantiated = 0;
2560 mutex_init(&card->mutex);
2561 mutex_init(&card->dapm_mutex);
2562 mutex_init(&card->pcm_mutex);
2564 mutex_lock(&client_mutex);
2566 if (card->devres_dev) {
2567 ret = devm_snd_soc_bind_card(card->devres_dev, card);
2568 if (ret == -EPROBE_DEFER) {
2569 list_add(&card->list, &unbind_card_list);
2573 ret = snd_soc_bind_card(card);
2576 mutex_unlock(&client_mutex);
2580 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2583 * snd_soc_unregister_card - Unregister a card with the ASoC core
2585 * @card: Card to unregister
2588 void snd_soc_unregister_card(struct snd_soc_card *card)
2590 mutex_lock(&client_mutex);
2591 snd_soc_unbind_card(card);
2592 list_del(&card->list);
2593 mutex_unlock(&client_mutex);
2594 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2596 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2599 * Simplify DAI link configuration by removing ".-1" from device names
2600 * and sanitizing names.
2602 static char *fmt_single_name(struct device *dev, int *id)
2604 const char *devname = dev_name(dev);
2606 unsigned int id1, id2;
2608 if (devname == NULL)
2611 name = devm_kstrdup(dev, devname, GFP_KERNEL);
2615 /* are we a "%s.%d" name (platform and SPI components) */
2616 found = strstr(name, dev->driver->name);
2619 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2621 /* discard ID from name if ID == -1 */
2623 found[strlen(dev->driver->name)] = '\0';
2626 /* I2C component devices are named "bus-addr" */
2627 } else if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2629 /* create unique ID number from I2C addr and bus */
2630 *id = ((id1 & 0xffff) << 16) + id2;
2632 devm_kfree(dev, name);
2634 /* sanitize component name for DAI link creation */
2635 name = devm_kasprintf(dev, GFP_KERNEL, "%s.%s", dev->driver->name, devname);
2644 * Simplify DAI link naming for single devices with multiple DAIs by removing
2645 * any ".-1" and using the DAI name (instead of device name).
2647 static inline char *fmt_multiple_name(struct device *dev,
2648 struct snd_soc_dai_driver *dai_drv)
2650 if (dai_drv->name == NULL) {
2652 "ASoC: error - multiple DAI %s registered with no name\n",
2657 return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2660 void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2662 dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2663 list_del(&dai->list);
2665 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2668 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2670 * @component: The component the DAIs are registered for
2671 * @dai_drv: DAI driver to use for the DAI
2672 * @legacy_dai_naming: if %true, use legacy single-name format;
2673 * if %false, use multiple-name format;
2675 * Topology can use this API to register DAIs when probing a component.
2676 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2677 * will be freed in the component cleanup.
2679 struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2680 struct snd_soc_dai_driver *dai_drv,
2681 bool legacy_dai_naming)
2683 struct device *dev = component->dev;
2684 struct snd_soc_dai *dai;
2686 lockdep_assert_held(&client_mutex);
2688 dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2693 * Back in the old days when we still had component-less DAIs,
2694 * instead of having a static name, component-less DAIs would
2695 * inherit the name of the parent device so it is possible to
2696 * register multiple instances of the DAI. We still need to keep
2697 * the same naming style even though those DAIs are not
2698 * component-less anymore.
2700 if (legacy_dai_naming &&
2701 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2702 dai->name = fmt_single_name(dev, &dai->id);
2704 dai->name = fmt_multiple_name(dev, dai_drv);
2706 dai->id = dai_drv->id;
2708 dai->id = component->num_dai;
2713 dai->component = component;
2715 dai->driver = dai_drv;
2717 /* see for_each_component_dais */
2718 list_add_tail(&dai->list, &component->dai_list);
2719 component->num_dai++;
2721 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2724 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2727 * snd_soc_unregister_dais - Unregister DAIs from the ASoC core
2729 * @component: The component for which the DAIs should be unregistered
2731 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2733 struct snd_soc_dai *dai, *_dai;
2735 for_each_component_dais_safe(component, dai, _dai)
2736 snd_soc_unregister_dai(dai);
2740 * snd_soc_register_dais - Register a DAI with the ASoC core
2742 * @component: The component the DAIs are registered for
2743 * @dai_drv: DAI driver to use for the DAIs
2744 * @count: Number of DAIs
2746 static int snd_soc_register_dais(struct snd_soc_component *component,
2747 struct snd_soc_dai_driver *dai_drv,
2750 struct snd_soc_dai *dai;
2754 for (i = 0; i < count; i++) {
2755 dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2756 component->driver->legacy_dai_naming);
2766 snd_soc_unregister_dais(component);
2771 #define ENDIANNESS_MAP(name) \
2772 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2773 static u64 endianness_format_map[] = {
2774 ENDIANNESS_MAP(S16_),
2775 ENDIANNESS_MAP(U16_),
2776 ENDIANNESS_MAP(S24_),
2777 ENDIANNESS_MAP(U24_),
2778 ENDIANNESS_MAP(S32_),
2779 ENDIANNESS_MAP(U32_),
2780 ENDIANNESS_MAP(S24_3),
2781 ENDIANNESS_MAP(U24_3),
2782 ENDIANNESS_MAP(S20_3),
2783 ENDIANNESS_MAP(U20_3),
2784 ENDIANNESS_MAP(S18_3),
2785 ENDIANNESS_MAP(U18_3),
2786 ENDIANNESS_MAP(FLOAT_),
2787 ENDIANNESS_MAP(FLOAT64_),
2788 ENDIANNESS_MAP(IEC958_SUBFRAME_),
2792 * Fix up the DAI formats for endianness: codecs don't actually see
2793 * the endianness of the data but we're using the CPU format
2794 * definitions which do need to include endianness so we ensure that
2795 * codec DAIs always have both big and little endian variants set.
2797 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2801 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2802 if (stream->formats & endianness_format_map[i])
2803 stream->formats |= endianness_format_map[i];
2806 static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2808 struct snd_soc_card *card = component->card;
2811 snd_soc_unregister_dais(component);
2814 instantiated = card->instantiated;
2815 snd_soc_unbind_card(card);
2817 list_add(&card->list, &unbind_card_list);
2820 list_del(&component->list);
2823 int snd_soc_component_initialize(struct snd_soc_component *component,
2824 const struct snd_soc_component_driver *driver,
2827 INIT_LIST_HEAD(&component->dai_list);
2828 INIT_LIST_HEAD(&component->dobj_list);
2829 INIT_LIST_HEAD(&component->card_list);
2830 INIT_LIST_HEAD(&component->list);
2831 mutex_init(&component->io_mutex);
2833 if (!component->name) {
2834 component->name = fmt_single_name(dev, &component->id);
2835 if (!component->name) {
2836 dev_err(dev, "ASoC: Failed to allocate name\n");
2841 component->dev = dev;
2842 component->driver = driver;
2844 #ifdef CONFIG_DEBUG_FS
2845 if (!component->debugfs_prefix)
2846 component->debugfs_prefix = driver->debugfs_prefix;
2851 EXPORT_SYMBOL_GPL(snd_soc_component_initialize);
2853 int snd_soc_add_component(struct snd_soc_component *component,
2854 struct snd_soc_dai_driver *dai_drv,
2857 struct snd_soc_card *card, *c;
2861 mutex_lock(&client_mutex);
2863 if (component->driver->endianness) {
2864 for (i = 0; i < num_dai; i++) {
2865 convert_endianness_formats(&dai_drv[i].playback);
2866 convert_endianness_formats(&dai_drv[i].capture);
2870 ret = snd_soc_register_dais(component, dai_drv, num_dai);
2872 dev_err(component->dev, "ASoC: Failed to register DAIs: %d\n",
2877 if (!component->driver->write && !component->driver->read) {
2878 if (!component->regmap)
2879 component->regmap = dev_get_regmap(component->dev,
2881 if (component->regmap)
2882 snd_soc_component_setup_regmap(component);
2885 /* see for_each_component */
2886 list_add(&component->list, &component_list);
2888 list_for_each_entry_safe(card, c, &unbind_card_list, list)
2889 snd_soc_rebind_card(card);
2893 snd_soc_del_component_unlocked(component);
2895 mutex_unlock(&client_mutex);
2898 EXPORT_SYMBOL_GPL(snd_soc_add_component);
2900 int snd_soc_register_component(struct device *dev,
2901 const struct snd_soc_component_driver *component_driver,
2902 struct snd_soc_dai_driver *dai_drv,
2905 struct snd_soc_component *component;
2908 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2912 ret = snd_soc_component_initialize(component, component_driver, dev);
2916 return snd_soc_add_component(component, dai_drv, num_dai);
2918 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2921 * snd_soc_unregister_component_by_driver - Unregister component using a given driver
2922 * from the ASoC core
2924 * @dev: The device to unregister
2925 * @component_driver: The component driver to unregister
2927 void snd_soc_unregister_component_by_driver(struct device *dev,
2928 const struct snd_soc_component_driver *component_driver)
2930 const char *driver_name = NULL;
2932 if (component_driver)
2933 driver_name = component_driver->name;
2935 mutex_lock(&client_mutex);
2937 struct snd_soc_component *component = snd_soc_lookup_component_nolocked(dev, driver_name);
2942 snd_soc_del_component_unlocked(component);
2944 mutex_unlock(&client_mutex);
2946 EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver);
2948 /* Retrieve a card's name from device tree */
2949 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2950 const char *propname)
2952 struct device_node *np;
2956 pr_err("card->dev is not set before calling %s\n", __func__);
2960 np = card->dev->of_node;
2962 ret = of_property_read_string_index(np, propname, 0, &card->name);
2964 * EINVAL means the property does not exist. This is fine providing
2965 * card->name was previously set, which is checked later in
2966 * snd_soc_register_card.
2968 if (ret < 0 && ret != -EINVAL) {
2970 "ASoC: Property '%s' could not be read: %d\n",
2977 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2979 static const struct snd_soc_dapm_widget simple_widgets[] = {
2980 SND_SOC_DAPM_MIC("Microphone", NULL),
2981 SND_SOC_DAPM_LINE("Line", NULL),
2982 SND_SOC_DAPM_HP("Headphone", NULL),
2983 SND_SOC_DAPM_SPK("Speaker", NULL),
2986 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2987 const char *propname)
2989 struct device_node *np = card->dev->of_node;
2990 struct snd_soc_dapm_widget *widgets;
2991 const char *template, *wname;
2992 int i, j, num_widgets;
2994 num_widgets = of_property_count_strings(np, propname);
2995 if (num_widgets < 0) {
2997 "ASoC: Property '%s' does not exist\n", propname);
3001 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3005 if (num_widgets & 1) {
3007 "ASoC: Property '%s' length is not even\n", propname);
3013 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3017 "ASoC: Could not allocate memory for widgets\n");
3021 for (i = 0; i < num_widgets; i++) {
3022 int ret = of_property_read_string_index(np, propname,
3026 "ASoC: Property '%s' index %d read error:%d\n",
3027 propname, 2 * i, ret);
3031 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3032 if (!strncmp(template, simple_widgets[j].name,
3033 strlen(simple_widgets[j].name))) {
3034 widgets[i] = simple_widgets[j];
3039 if (j >= ARRAY_SIZE(simple_widgets)) {
3041 "ASoC: DAPM widget '%s' is not supported\n",
3046 ret = of_property_read_string_index(np, propname,
3051 "ASoC: Property '%s' index %d read error:%d\n",
3052 propname, (2 * i) + 1, ret);
3056 widgets[i].name = wname;
3059 card->of_dapm_widgets = widgets;
3060 card->num_of_dapm_widgets = num_widgets;
3064 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3066 int snd_soc_of_parse_pin_switches(struct snd_soc_card *card, const char *prop)
3068 const unsigned int nb_controls_max = 16;
3069 const char **strings, *control_name;
3070 struct snd_kcontrol_new *controls;
3071 struct device *dev = card->dev;
3072 unsigned int i, nb_controls;
3075 if (!of_property_present(dev->of_node, prop))
3078 strings = devm_kcalloc(dev, nb_controls_max,
3079 sizeof(*strings), GFP_KERNEL);
3083 ret = of_property_read_string_array(dev->of_node, prop,
3084 strings, nb_controls_max);
3088 nb_controls = (unsigned int)ret;
3090 controls = devm_kcalloc(dev, nb_controls,
3091 sizeof(*controls), GFP_KERNEL);
3095 for (i = 0; i < nb_controls; i++) {
3096 control_name = devm_kasprintf(dev, GFP_KERNEL,
3097 "%s Switch", strings[i]);
3101 controls[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
3102 controls[i].name = control_name;
3103 controls[i].info = snd_soc_dapm_info_pin_switch;
3104 controls[i].get = snd_soc_dapm_get_pin_switch;
3105 controls[i].put = snd_soc_dapm_put_pin_switch;
3106 controls[i].private_value = (unsigned long)strings[i];
3109 card->controls = controls;
3110 card->num_controls = nb_controls;
3114 EXPORT_SYMBOL_GPL(snd_soc_of_parse_pin_switches);
3116 int snd_soc_of_get_slot_mask(struct device_node *np,
3117 const char *prop_name,
3121 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3127 for (i = 0; i < val; i++)
3128 if (be32_to_cpup(&of_slot_mask[i]))
3133 EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
3135 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3136 unsigned int *tx_mask,
3137 unsigned int *rx_mask,
3138 unsigned int *slots,
3139 unsigned int *slot_width)
3145 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3147 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3149 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3150 if (ret && ret != -EINVAL)
3155 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3156 if (ret && ret != -EINVAL)
3158 if (!ret && slot_width)
3163 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3165 void snd_soc_dlc_use_cpu_as_platform(struct snd_soc_dai_link_component *platforms,
3166 struct snd_soc_dai_link_component *cpus)
3168 platforms->of_node = cpus->of_node;
3169 platforms->dai_args = cpus->dai_args;
3171 EXPORT_SYMBOL_GPL(snd_soc_dlc_use_cpu_as_platform);
3173 void snd_soc_of_parse_node_prefix(struct device_node *np,
3174 struct snd_soc_codec_conf *codec_conf,
3175 struct device_node *of_node,
3176 const char *propname)
3181 ret = of_property_read_string(np, propname, &str);
3183 /* no prefix is not error */
3187 codec_conf->dlc.of_node = of_node;
3188 codec_conf->name_prefix = str;
3190 EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
3192 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3193 const char *propname)
3195 struct device_node *np = card->dev->of_node;
3197 struct snd_soc_dapm_route *routes;
3200 num_routes = of_property_count_strings(np, propname);
3201 if (num_routes < 0 || num_routes & 1) {
3203 "ASoC: Property '%s' does not exist or its length is not even\n",
3209 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3213 "ASoC: Could not allocate DAPM route table\n");
3217 for (i = 0; i < num_routes; i++) {
3218 int ret = of_property_read_string_index(np, propname,
3219 2 * i, &routes[i].sink);
3222 "ASoC: Property '%s' index %d could not be read: %d\n",
3223 propname, 2 * i, ret);
3226 ret = of_property_read_string_index(np, propname,
3227 (2 * i) + 1, &routes[i].source);
3230 "ASoC: Property '%s' index %d could not be read: %d\n",
3231 propname, (2 * i) + 1, ret);
3236 card->num_of_dapm_routes = num_routes;
3237 card->of_dapm_routes = routes;
3241 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3243 int snd_soc_of_parse_aux_devs(struct snd_soc_card *card, const char *propname)
3245 struct device_node *node = card->dev->of_node;
3246 struct snd_soc_aux_dev *aux;
3249 num = of_count_phandle_with_args(node, propname, NULL);
3250 if (num == -ENOENT) {
3252 } else if (num < 0) {
3253 dev_err(card->dev, "ASOC: Property '%s' could not be read: %d\n",
3258 aux = devm_kcalloc(card->dev, num, sizeof(*aux), GFP_KERNEL);
3261 card->aux_dev = aux;
3262 card->num_aux_devs = num;
3264 for_each_card_pre_auxs(card, i, aux) {
3265 aux->dlc.of_node = of_parse_phandle(node, propname, i);
3266 if (!aux->dlc.of_node)
3272 EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs);
3274 unsigned int snd_soc_daifmt_clock_provider_flipped(unsigned int dai_fmt)
3276 unsigned int inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
3278 switch (dai_fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
3279 case SND_SOC_DAIFMT_CBP_CFP:
3280 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFC;
3282 case SND_SOC_DAIFMT_CBP_CFC:
3283 inv_dai_fmt |= SND_SOC_DAIFMT_CBC_CFP;
3285 case SND_SOC_DAIFMT_CBC_CFP:
3286 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFC;
3288 case SND_SOC_DAIFMT_CBC_CFC:
3289 inv_dai_fmt |= SND_SOC_DAIFMT_CBP_CFP;
3295 EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_flipped);
3297 unsigned int snd_soc_daifmt_clock_provider_from_bitmap(unsigned int bit_frame)
3300 * bit_frame is return value from
3301 * snd_soc_daifmt_parse_clock_provider_raw()
3305 switch (bit_frame) {
3307 return SND_SOC_DAIFMT_CBP_CFP;
3309 return SND_SOC_DAIFMT_CBP_CFC;
3311 return SND_SOC_DAIFMT_CBC_CFP;
3313 return SND_SOC_DAIFMT_CBC_CFC;
3318 EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_from_bitmap);
3320 unsigned int snd_soc_daifmt_parse_format(struct device_node *np,
3325 unsigned int format = 0;
3331 } of_fmt_table[] = {
3332 { "i2s", SND_SOC_DAIFMT_I2S },
3333 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3334 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3335 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3336 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3337 { "ac97", SND_SOC_DAIFMT_AC97 },
3338 { "pdm", SND_SOC_DAIFMT_PDM},
3339 { "msb", SND_SOC_DAIFMT_MSB },
3340 { "lsb", SND_SOC_DAIFMT_LSB },
3347 * check "dai-format = xxx"
3348 * or "[prefix]format = xxx"
3349 * SND_SOC_DAIFMT_FORMAT_MASK area
3351 ret = of_property_read_string(np, "dai-format", &str);
3353 snprintf(prop, sizeof(prop), "%sformat", prefix);
3354 ret = of_property_read_string(np, prop, &str);
3359 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3360 if (strcmp(str, of_fmt_table[i].name) == 0) {
3361 format |= of_fmt_table[i].val;
3368 * check "[prefix]continuous-clock"
3369 * SND_SOC_DAIFMT_CLOCK_MASK area
3371 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3372 if (of_property_read_bool(np, prop))
3373 format |= SND_SOC_DAIFMT_CONT;
3375 format |= SND_SOC_DAIFMT_GATED;
3378 * check "[prefix]bitclock-inversion"
3379 * check "[prefix]frame-inversion"
3380 * SND_SOC_DAIFMT_INV_MASK area
3382 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3383 bit = of_property_read_bool(np, prop);
3385 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3386 frame = of_property_read_bool(np, prop);
3388 switch ((bit << 4) + frame) {
3390 format |= SND_SOC_DAIFMT_IB_IF;
3393 format |= SND_SOC_DAIFMT_IB_NF;
3396 format |= SND_SOC_DAIFMT_NB_IF;
3399 /* SND_SOC_DAIFMT_NB_NF is default */
3405 EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_format);
3407 unsigned int snd_soc_daifmt_parse_clock_provider_raw(struct device_node *np,
3409 struct device_node **bitclkmaster,
3410 struct device_node **framemaster)
3413 unsigned int bit, frame;
3422 * check "[prefix]bitclock-master"
3423 * check "[prefix]frame-master"
3425 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3426 bit = of_property_present(np, prop);
3427 if (bit && bitclkmaster)
3428 *bitclkmaster = of_parse_phandle(np, prop, 0);
3430 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3431 frame = of_property_present(np, prop);
3432 if (frame && framemaster)
3433 *framemaster = of_parse_phandle(np, prop, 0);
3437 * It will be parameter of
3438 * snd_soc_daifmt_clock_provider_from_bitmap()
3440 return (bit << 4) + frame;
3442 EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_clock_provider_raw);
3444 int snd_soc_get_stream_cpu(const struct snd_soc_dai_link *dai_link, int stream)
3450 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3451 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3454 * CPU : SNDRV_PCM_STREAM_CAPTURE
3455 * Codec: SNDRV_PCM_STREAM_CAPTURE
3457 if (!dai_link->c2c_params)
3464 * CPU : SNDRV_PCM_STREAM_CAPTURE
3465 * Codec: SNDRV_PCM_STREAM_PLAYBACK
3468 * CPU : SNDRV_PCM_STREAM_PLAYBACK
3469 * Codec: SNDRV_PCM_STREAM_CAPTURE
3471 if (stream == SNDRV_PCM_STREAM_CAPTURE)
3472 return SNDRV_PCM_STREAM_PLAYBACK;
3474 return SNDRV_PCM_STREAM_CAPTURE;
3476 EXPORT_SYMBOL_GPL(snd_soc_get_stream_cpu);
3478 int snd_soc_get_dai_id(struct device_node *ep)
3480 struct snd_soc_component *component;
3481 struct snd_soc_dai_link_component dlc = {
3482 .of_node = of_graph_get_port_parent(ep),
3488 * For example HDMI case, HDMI has video/sound port,
3489 * but ALSA SoC needs sound port number only.
3490 * Thus counting HDMI DT port/endpoint doesn't work.
3491 * Then, it should have .of_xlate_dai_id
3494 mutex_lock(&client_mutex);
3495 component = soc_find_component(&dlc);
3497 ret = snd_soc_component_of_xlate_dai_id(component, ep);
3498 mutex_unlock(&client_mutex);
3500 of_node_put(dlc.of_node);
3504 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3506 int snd_soc_get_dlc(const struct of_phandle_args *args, struct snd_soc_dai_link_component *dlc)
3508 struct snd_soc_component *pos;
3509 int ret = -EPROBE_DEFER;
3511 mutex_lock(&client_mutex);
3512 for_each_component(pos) {
3513 struct device_node *component_of_node = soc_component_to_node(pos);
3515 if (component_of_node != args->np || !pos->num_dai)
3518 ret = snd_soc_component_of_xlate_dai_name(pos, args, &dlc->dai_name);
3519 if (ret == -ENOTSUPP) {
3520 struct snd_soc_dai *dai;
3523 switch (args->args_count) {
3525 id = 0; /* same as dai_drv[0] */
3535 if (id < 0 || id >= pos->num_dai) {
3542 /* find target DAI */
3543 for_each_component_dais(pos, dai) {
3549 dlc->dai_name = snd_soc_dai_name_get(dai);
3552 * if another error than ENOTSUPP is returned go on and
3553 * check if another component is provided with the same
3554 * node. This may happen if a device provides several
3564 dlc->of_node = args->np;
3566 mutex_unlock(&client_mutex);
3569 EXPORT_SYMBOL_GPL(snd_soc_get_dlc);
3571 int snd_soc_of_get_dlc(struct device_node *of_node,
3572 struct of_phandle_args *args,
3573 struct snd_soc_dai_link_component *dlc,
3576 struct of_phandle_args __args;
3582 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3583 "#sound-dai-cells", index, args);
3587 return snd_soc_get_dlc(args, dlc);
3589 EXPORT_SYMBOL_GPL(snd_soc_of_get_dlc);
3591 int snd_soc_get_dai_name(const struct of_phandle_args *args,
3592 const char **dai_name)
3594 struct snd_soc_dai_link_component dlc;
3595 int ret = snd_soc_get_dlc(args, &dlc);
3598 *dai_name = dlc.dai_name;
3602 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3604 int snd_soc_of_get_dai_name(struct device_node *of_node,
3605 const char **dai_name, int index)
3607 struct snd_soc_dai_link_component dlc;
3608 int ret = snd_soc_of_get_dlc(of_node, NULL, &dlc, index);
3611 *dai_name = dlc.dai_name;
3615 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3617 struct snd_soc_dai *snd_soc_get_dai_via_args(const struct of_phandle_args *dai_args)
3619 struct snd_soc_dai *dai;
3620 struct snd_soc_component *component;
3622 mutex_lock(&client_mutex);
3623 for_each_component(component) {
3624 for_each_component_dais(component, dai)
3625 if (snd_soc_is_match_dai_args(dai->driver->dai_args, dai_args))
3630 mutex_unlock(&client_mutex);
3633 EXPORT_SYMBOL_GPL(snd_soc_get_dai_via_args);
3635 static void __snd_soc_of_put_component(struct snd_soc_dai_link_component *component)
3637 if (component->of_node) {
3638 of_node_put(component->of_node);
3639 component->of_node = NULL;
3643 static int __snd_soc_of_get_dai_link_component_alloc(
3644 struct device *dev, struct device_node *of_node,
3645 struct snd_soc_dai_link_component **ret_component,
3648 struct snd_soc_dai_link_component *component;
3651 /* Count the number of CPUs/CODECs */
3652 num = of_count_phandle_with_args(of_node, "sound-dai", "#sound-dai-cells");
3655 dev_err(dev, "No 'sound-dai' property\n");
3657 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3660 component = devm_kcalloc(dev, num, sizeof(*component), GFP_KERNEL);
3664 *ret_component = component;
3671 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3672 * @dai_link: DAI link
3674 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3676 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3678 struct snd_soc_dai_link_component *component;
3681 for_each_link_codecs(dai_link, index, component)
3682 __snd_soc_of_put_component(component);
3684 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3687 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3689 * @of_node: Device node
3690 * @dai_link: DAI link
3692 * Builds an array of CODEC DAI components from the DAI link property
3694 * The array is set in the DAI link and the number of DAIs is set accordingly.
3695 * The device nodes in the array (of_node) must be dereferenced by calling
3696 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3698 * Returns 0 for success
3700 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3701 struct device_node *of_node,
3702 struct snd_soc_dai_link *dai_link)
3704 struct snd_soc_dai_link_component *component;
3707 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3708 &dai_link->codecs, &dai_link->num_codecs);
3712 /* Parse the list */
3713 for_each_link_codecs(dai_link, index, component) {
3714 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3720 snd_soc_of_put_dai_link_codecs(dai_link);
3721 dai_link->codecs = NULL;
3722 dai_link->num_codecs = 0;
3725 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3728 * snd_soc_of_put_dai_link_cpus - Dereference device nodes in the codecs array
3729 * @dai_link: DAI link
3731 * Dereference device nodes acquired by snd_soc_of_get_dai_link_cpus().
3733 void snd_soc_of_put_dai_link_cpus(struct snd_soc_dai_link *dai_link)
3735 struct snd_soc_dai_link_component *component;
3738 for_each_link_cpus(dai_link, index, component)
3739 __snd_soc_of_put_component(component);
3741 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_cpus);
3744 * snd_soc_of_get_dai_link_cpus - Parse a list of CPU DAIs in the devicetree
3746 * @of_node: Device node
3747 * @dai_link: DAI link
3749 * Is analogous to snd_soc_of_get_dai_link_codecs but parses a list of CPU DAIs
3752 * Returns 0 for success
3754 int snd_soc_of_get_dai_link_cpus(struct device *dev,
3755 struct device_node *of_node,
3756 struct snd_soc_dai_link *dai_link)
3758 struct snd_soc_dai_link_component *component;
3761 /* Count the number of CPUs */
3762 ret = __snd_soc_of_get_dai_link_component_alloc(dev, of_node,
3763 &dai_link->cpus, &dai_link->num_cpus);
3767 /* Parse the list */
3768 for_each_link_cpus(dai_link, index, component) {
3769 ret = snd_soc_of_get_dlc(of_node, NULL, component, index);
3775 snd_soc_of_put_dai_link_cpus(dai_link);
3776 dai_link->cpus = NULL;
3777 dai_link->num_cpus = 0;
3780 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_cpus);
3782 static int __init snd_soc_init(void)
3786 snd_soc_debugfs_init();
3787 ret = snd_soc_util_init();
3791 ret = platform_driver_register(&soc_driver);
3797 snd_soc_util_exit();
3799 snd_soc_debugfs_exit();
3802 module_init(snd_soc_init);
3804 static void __exit snd_soc_exit(void)
3806 snd_soc_util_exit();
3807 snd_soc_debugfs_exit();
3809 platform_driver_unregister(&soc_driver);
3811 module_exit(snd_soc_exit);
3813 /* Module information */
3814 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3815 MODULE_DESCRIPTION("ALSA SoC Core");
3816 MODULE_LICENSE("GPL");
3817 MODULE_ALIAS("platform:soc-audio");