1 // SPDX-License-Identifier: GPL-2.0+
3 // soc-core.c -- ALSA SoC Audio Layer
5 // Copyright 2005 Wolfson Microelectronics PLC.
6 // Copyright 2005 Openedhand Ltd.
7 // Copyright (C) 2010 Slimlogic Ltd.
8 // Copyright (C) 2010 Texas Instruments Inc.
10 // Author: Liam Girdwood <lrg@slimlogic.co.uk>
11 // with code, comments and ideas from :-
12 // Richard Purdie <richard@openedhand.com>
15 // o Add hw rules to enforce rates, etc.
16 // o More testing with other codecs/machines.
17 // o Add more codecs and platforms to ensure good API coverage.
18 // o Support TDM on PCM and I2S
20 #include <linux/module.h>
21 #include <linux/moduleparam.h>
22 #include <linux/init.h>
23 #include <linux/delay.h>
25 #include <linux/bitops.h>
26 #include <linux/debugfs.h>
27 #include <linux/platform_device.h>
28 #include <linux/pinctrl/consumer.h>
29 #include <linux/ctype.h>
30 #include <linux/slab.h>
32 #include <linux/of_graph.h>
33 #include <linux/dmi.h>
34 #include <sound/core.h>
35 #include <sound/jack.h>
36 #include <sound/pcm.h>
37 #include <sound/pcm_params.h>
38 #include <sound/soc.h>
39 #include <sound/soc-dpcm.h>
40 #include <sound/soc-topology.h>
41 #include <sound/initval.h>
43 #define CREATE_TRACE_POINTS
44 #include <trace/events/asoc.h>
48 #ifdef CONFIG_DEBUG_FS
49 struct dentry *snd_soc_debugfs_root;
50 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
53 static DEFINE_MUTEX(client_mutex);
54 static LIST_HEAD(component_list);
55 static LIST_HEAD(unbind_card_list);
57 #define for_each_component(component) \
58 list_for_each_entry(component, &component_list, list)
61 * This is used if driver don't need to have CPU/Codec/Platform
64 struct snd_soc_dai_link_component null_dailink_component[0];
65 EXPORT_SYMBOL_GPL(null_dailink_component);
68 * This is a timeout to do a DAPM powerdown after a stream is closed().
69 * It can be used to eliminate pops between different playback streams, e.g.
70 * between two audio tracks.
72 static int pmdown_time = 5000;
73 module_param(pmdown_time, int, 0);
74 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
77 * If a DMI filed contain strings in this blacklist (e.g.
78 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
79 * as invalid and dropped when setting the card long name from DMI info.
81 static const char * const dmi_blacklist[] = {
82 "To be filled by OEM",
88 NULL, /* terminator */
91 static ssize_t pmdown_time_show(struct device *dev,
92 struct device_attribute *attr, char *buf)
94 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
96 return sprintf(buf, "%ld\n", rtd->pmdown_time);
99 static ssize_t pmdown_time_set(struct device *dev,
100 struct device_attribute *attr,
101 const char *buf, size_t count)
103 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
106 ret = kstrtol(buf, 10, &rtd->pmdown_time);
113 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
115 static struct attribute *soc_dev_attrs[] = {
116 &dev_attr_pmdown_time.attr,
120 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
121 struct attribute *attr, int idx)
123 struct device *dev = kobj_to_dev(kobj);
124 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
126 if (attr == &dev_attr_pmdown_time.attr)
127 return attr->mode; /* always visible */
128 return rtd->num_codecs ? attr->mode : 0; /* enabled only with codec */
131 static const struct attribute_group soc_dapm_dev_group = {
132 .attrs = soc_dapm_dev_attrs,
133 .is_visible = soc_dev_attr_is_visible,
136 static const struct attribute_group soc_dev_group = {
137 .attrs = soc_dev_attrs,
138 .is_visible = soc_dev_attr_is_visible,
141 static const struct attribute_group *soc_dev_attr_groups[] = {
147 #ifdef CONFIG_DEBUG_FS
148 static void soc_init_component_debugfs(struct snd_soc_component *component)
150 if (!component->card->debugfs_card_root)
153 if (component->debugfs_prefix) {
156 name = kasprintf(GFP_KERNEL, "%s:%s",
157 component->debugfs_prefix, component->name);
159 component->debugfs_root = debugfs_create_dir(name,
160 component->card->debugfs_card_root);
164 component->debugfs_root = debugfs_create_dir(component->name,
165 component->card->debugfs_card_root);
168 if (IS_ERR(component->debugfs_root)) {
169 dev_warn(component->dev,
170 "ASoC: Failed to create component debugfs directory: %ld\n",
171 PTR_ERR(component->debugfs_root));
175 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
176 component->debugfs_root);
179 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
181 debugfs_remove_recursive(component->debugfs_root);
184 static int dai_list_show(struct seq_file *m, void *v)
186 struct snd_soc_component *component;
187 struct snd_soc_dai *dai;
189 mutex_lock(&client_mutex);
191 for_each_component(component)
192 for_each_component_dais(component, dai)
193 seq_printf(m, "%s\n", dai->name);
195 mutex_unlock(&client_mutex);
199 DEFINE_SHOW_ATTRIBUTE(dai_list);
201 static int component_list_show(struct seq_file *m, void *v)
203 struct snd_soc_component *component;
205 mutex_lock(&client_mutex);
207 for_each_component(component)
208 seq_printf(m, "%s\n", component->name);
210 mutex_unlock(&client_mutex);
214 DEFINE_SHOW_ATTRIBUTE(component_list);
216 static void soc_init_card_debugfs(struct snd_soc_card *card)
218 if (!snd_soc_debugfs_root)
221 card->debugfs_card_root = debugfs_create_dir(card->name,
222 snd_soc_debugfs_root);
223 if (IS_ERR(card->debugfs_card_root)) {
225 "ASoC: Failed to create card debugfs directory: %ld\n",
226 PTR_ERR(card->debugfs_card_root));
227 card->debugfs_card_root = NULL;
231 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
232 card->debugfs_card_root,
234 if (IS_ERR(card->debugfs_pop_time))
236 "ASoC: Failed to create pop time debugfs file: %ld\n",
237 PTR_ERR(card->debugfs_pop_time));
240 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
242 if (!card->debugfs_card_root)
244 debugfs_remove_recursive(card->debugfs_card_root);
245 card->debugfs_card_root = NULL;
248 static void snd_soc_debugfs_init(void)
250 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
251 if (IS_ERR_OR_NULL(snd_soc_debugfs_root)) {
252 pr_warn("ASoC: Failed to create debugfs directory\n");
253 snd_soc_debugfs_root = NULL;
257 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
259 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
261 if (!debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
262 &component_list_fops))
263 pr_warn("ASoC: Failed to create component list debugfs file\n");
266 static void snd_soc_debugfs_exit(void)
268 debugfs_remove_recursive(snd_soc_debugfs_root);
273 static inline void soc_init_component_debugfs(
274 struct snd_soc_component *component)
278 static inline void soc_cleanup_component_debugfs(
279 struct snd_soc_component *component)
283 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
287 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
291 static inline void snd_soc_debugfs_init(void)
295 static inline void snd_soc_debugfs_exit(void)
301 static int snd_soc_rtdcom_add(struct snd_soc_pcm_runtime *rtd,
302 struct snd_soc_component *component)
304 struct snd_soc_rtdcom_list *rtdcom;
305 struct snd_soc_rtdcom_list *new_rtdcom;
307 for_each_rtdcom(rtd, rtdcom) {
308 /* already connected */
309 if (rtdcom->component == component)
313 new_rtdcom = kmalloc(sizeof(*new_rtdcom), GFP_KERNEL);
317 new_rtdcom->component = component;
318 INIT_LIST_HEAD(&new_rtdcom->list);
320 list_add_tail(&new_rtdcom->list, &rtd->component_list);
325 static void snd_soc_rtdcom_del_all(struct snd_soc_pcm_runtime *rtd)
327 struct snd_soc_rtdcom_list *rtdcom1, *rtdcom2;
329 for_each_rtdcom_safe(rtd, rtdcom1, rtdcom2)
332 INIT_LIST_HEAD(&rtd->component_list);
335 struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
336 const char *driver_name)
338 struct snd_soc_rtdcom_list *rtdcom;
343 for_each_rtdcom(rtd, rtdcom) {
344 const char *component_name = rtdcom->component->driver->name;
349 if ((component_name == driver_name) ||
350 strcmp(component_name, driver_name) == 0)
351 return rtdcom->component;
356 EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
358 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
359 const char *dai_link, int stream)
361 struct snd_soc_pcm_runtime *rtd;
363 for_each_card_rtds(card, rtd) {
364 if (rtd->dai_link->no_pcm &&
365 !strcmp(rtd->dai_link->name, dai_link))
366 return rtd->pcm->streams[stream].substream;
368 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
371 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
373 static const struct snd_soc_ops null_snd_soc_ops;
375 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
376 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
378 struct snd_soc_pcm_runtime *rtd;
380 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
384 INIT_LIST_HEAD(&rtd->component_list);
386 rtd->dai_link = dai_link;
387 if (!rtd->dai_link->ops)
388 rtd->dai_link->ops = &null_snd_soc_ops;
390 rtd->codec_dais = kcalloc(dai_link->num_codecs,
391 sizeof(struct snd_soc_dai *),
393 if (!rtd->codec_dais) {
401 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
403 kfree(rtd->codec_dais);
404 snd_soc_rtdcom_del_all(rtd);
408 static void soc_add_pcm_runtime(struct snd_soc_card *card,
409 struct snd_soc_pcm_runtime *rtd)
411 list_add_tail(&rtd->list, &card->rtd_list);
412 rtd->num = card->num_rtd;
416 static void soc_remove_pcm_runtimes(struct snd_soc_card *card)
418 struct snd_soc_pcm_runtime *rtd, *_rtd;
420 for_each_card_rtds_safe(card, rtd, _rtd) {
421 list_del(&rtd->list);
422 soc_free_pcm_runtime(rtd);
428 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
429 const char *dai_link)
431 struct snd_soc_pcm_runtime *rtd;
433 for_each_card_rtds(card, rtd) {
434 if (!strcmp(rtd->dai_link->name, dai_link))
437 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
440 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
442 static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
444 struct snd_soc_pcm_runtime *rtd;
446 for_each_card_rtds(card, rtd)
447 flush_delayed_work(&rtd->delayed_work);
450 static void codec2codec_close_delayed_work(struct work_struct *work)
453 * Currently nothing to do for c2c links
454 * Since c2c links are internal nodes in the DAPM graph and
455 * don't interface with the outside world or application layer
456 * we don't have to do any special handling on close.
460 #ifdef CONFIG_PM_SLEEP
461 /* powers down audio subsystem for suspend */
462 int snd_soc_suspend(struct device *dev)
464 struct snd_soc_card *card = dev_get_drvdata(dev);
465 struct snd_soc_component *component;
466 struct snd_soc_pcm_runtime *rtd;
469 /* If the card is not initialized yet there is nothing to do */
470 if (!card->instantiated)
474 * Due to the resume being scheduled into a workqueue we could
475 * suspend before that's finished - wait for it to complete.
477 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
479 /* we're going to block userspace touching us until resume completes */
480 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
482 /* mute any active DACs */
483 for_each_card_rtds(card, rtd) {
484 struct snd_soc_dai *dai;
486 if (rtd->dai_link->ignore_suspend)
489 for_each_rtd_codec_dai(rtd, i, dai) {
490 struct snd_soc_dai_driver *drv = dai->driver;
492 if (drv->ops->digital_mute && dai->playback_active)
493 drv->ops->digital_mute(dai, 1);
497 /* suspend all pcms */
498 for_each_card_rtds(card, rtd) {
499 if (rtd->dai_link->ignore_suspend)
502 snd_pcm_suspend_all(rtd->pcm);
505 if (card->suspend_pre)
506 card->suspend_pre(card);
508 for_each_card_rtds(card, rtd) {
509 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
511 if (rtd->dai_link->ignore_suspend)
514 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
515 cpu_dai->driver->suspend(cpu_dai);
518 /* close any waiting streams */
519 snd_soc_flush_all_delayed_work(card);
521 for_each_card_rtds(card, rtd) {
523 if (rtd->dai_link->ignore_suspend)
526 snd_soc_dapm_stream_event(rtd,
527 SNDRV_PCM_STREAM_PLAYBACK,
528 SND_SOC_DAPM_STREAM_SUSPEND);
530 snd_soc_dapm_stream_event(rtd,
531 SNDRV_PCM_STREAM_CAPTURE,
532 SND_SOC_DAPM_STREAM_SUSPEND);
535 /* Recheck all endpoints too, their state is affected by suspend */
536 dapm_mark_endpoints_dirty(card);
537 snd_soc_dapm_sync(&card->dapm);
539 /* suspend all COMPONENTs */
540 for_each_card_components(card, component) {
541 struct snd_soc_dapm_context *dapm =
542 snd_soc_component_get_dapm(component);
545 * If there are paths active then the COMPONENT will be held
546 * with bias _ON and should not be suspended.
548 if (!component->suspended) {
549 switch (snd_soc_dapm_get_bias_level(dapm)) {
550 case SND_SOC_BIAS_STANDBY:
552 * If the COMPONENT is capable of idle
553 * bias off then being in STANDBY
554 * means it's doing something,
555 * otherwise fall through.
557 if (dapm->idle_bias_off) {
558 dev_dbg(component->dev,
559 "ASoC: idle_bias_off CODEC on over suspend\n");
564 case SND_SOC_BIAS_OFF:
565 if (component->driver->suspend)
566 component->driver->suspend(component);
567 component->suspended = 1;
568 if (component->regmap)
569 regcache_mark_dirty(component->regmap);
570 /* deactivate pins to sleep state */
571 pinctrl_pm_select_sleep_state(component->dev);
574 dev_dbg(component->dev,
575 "ASoC: COMPONENT is on over suspend\n");
581 for_each_card_rtds(card, rtd) {
582 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
584 if (rtd->dai_link->ignore_suspend)
587 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
588 cpu_dai->driver->suspend(cpu_dai);
590 /* deactivate pins to sleep state */
591 pinctrl_pm_select_sleep_state(cpu_dai->dev);
594 if (card->suspend_post)
595 card->suspend_post(card);
599 EXPORT_SYMBOL_GPL(snd_soc_suspend);
602 * deferred resume work, so resume can complete before we finished
603 * setting our codec back up, which can be very slow on I2C
605 static void soc_resume_deferred(struct work_struct *work)
607 struct snd_soc_card *card =
608 container_of(work, struct snd_soc_card,
609 deferred_resume_work);
610 struct snd_soc_pcm_runtime *rtd;
611 struct snd_soc_component *component;
615 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
616 * so userspace apps are blocked from touching us
619 dev_dbg(card->dev, "ASoC: starting resume work\n");
621 /* Bring us up into D2 so that DAPM starts enabling things */
622 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
624 if (card->resume_pre)
625 card->resume_pre(card);
627 /* resume control bus DAIs */
628 for_each_card_rtds(card, rtd) {
629 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
631 if (rtd->dai_link->ignore_suspend)
634 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
635 cpu_dai->driver->resume(cpu_dai);
638 for_each_card_components(card, component) {
639 if (component->suspended) {
640 if (component->driver->resume)
641 component->driver->resume(component);
642 component->suspended = 0;
646 for_each_card_rtds(card, rtd) {
648 if (rtd->dai_link->ignore_suspend)
651 snd_soc_dapm_stream_event(rtd,
652 SNDRV_PCM_STREAM_PLAYBACK,
653 SND_SOC_DAPM_STREAM_RESUME);
655 snd_soc_dapm_stream_event(rtd,
656 SNDRV_PCM_STREAM_CAPTURE,
657 SND_SOC_DAPM_STREAM_RESUME);
660 /* unmute any active DACs */
661 for_each_card_rtds(card, rtd) {
662 struct snd_soc_dai *dai;
664 if (rtd->dai_link->ignore_suspend)
667 for_each_rtd_codec_dai(rtd, i, dai) {
668 struct snd_soc_dai_driver *drv = dai->driver;
670 if (drv->ops->digital_mute && dai->playback_active)
671 drv->ops->digital_mute(dai, 0);
675 for_each_card_rtds(card, rtd) {
676 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
678 if (rtd->dai_link->ignore_suspend)
681 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
682 cpu_dai->driver->resume(cpu_dai);
685 if (card->resume_post)
686 card->resume_post(card);
688 dev_dbg(card->dev, "ASoC: resume work completed\n");
690 /* Recheck all endpoints too, their state is affected by suspend */
691 dapm_mark_endpoints_dirty(card);
692 snd_soc_dapm_sync(&card->dapm);
694 /* userspace can access us now we are back as we were before */
695 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
698 /* powers up audio subsystem after a suspend */
699 int snd_soc_resume(struct device *dev)
701 struct snd_soc_card *card = dev_get_drvdata(dev);
702 bool bus_control = false;
703 struct snd_soc_pcm_runtime *rtd;
704 struct snd_soc_dai *codec_dai;
707 /* If the card is not initialized yet there is nothing to do */
708 if (!card->instantiated)
711 /* activate pins from sleep state */
712 for_each_card_rtds(card, rtd) {
713 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
716 pinctrl_pm_select_default_state(cpu_dai->dev);
718 for_each_rtd_codec_dai(rtd, i, codec_dai) {
719 if (codec_dai->active)
720 pinctrl_pm_select_default_state(codec_dai->dev);
725 * DAIs that also act as the control bus master might have other drivers
726 * hanging off them so need to resume immediately. Other drivers don't
727 * have that problem and may take a substantial amount of time to resume
728 * due to I/O costs and anti-pop so handle them out of line.
730 for_each_card_rtds(card, rtd) {
731 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
733 bus_control |= cpu_dai->driver->bus_control;
736 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
737 soc_resume_deferred(&card->deferred_resume_work);
739 dev_dbg(dev, "ASoC: Scheduling resume work\n");
740 if (!schedule_work(&card->deferred_resume_work))
741 dev_err(dev, "ASoC: resume work item may be lost\n");
746 EXPORT_SYMBOL_GPL(snd_soc_resume);
748 #define snd_soc_suspend NULL
749 #define snd_soc_resume NULL
752 static const struct snd_soc_dai_ops null_dai_ops = {
755 static struct device_node
756 *soc_component_to_node(struct snd_soc_component *component)
758 struct device_node *of_node;
760 of_node = component->dev->of_node;
761 if (!of_node && component->dev->parent)
762 of_node = component->dev->parent->of_node;
767 static int snd_soc_is_matching_component(
768 const struct snd_soc_dai_link_component *dlc,
769 struct snd_soc_component *component)
771 struct device_node *component_of_node;
776 component_of_node = soc_component_to_node(component);
778 if (dlc->of_node && component_of_node != dlc->of_node)
780 if (dlc->name && strcmp(component->name, dlc->name))
786 static struct snd_soc_component *soc_find_component(
787 const struct snd_soc_dai_link_component *dlc)
789 struct snd_soc_component *component;
791 lockdep_assert_held(&client_mutex);
796 * It returns *1st* found component, but some driver
797 * has few components by same of_node/name
799 * CPU component and generic DMAEngine component
801 for_each_component(component)
802 if (snd_soc_is_matching_component(dlc, component))
809 * snd_soc_find_dai - Find a registered DAI
811 * @dlc: name of the DAI or the DAI driver and optional component info to match
813 * This function will search all registered components and their DAIs to
814 * find the DAI of the same name. The component's of_node and name
815 * should also match if being specified.
817 * Return: pointer of DAI, or NULL if not found.
819 struct snd_soc_dai *snd_soc_find_dai(
820 const struct snd_soc_dai_link_component *dlc)
822 struct snd_soc_component *component;
823 struct snd_soc_dai *dai;
825 lockdep_assert_held(&client_mutex);
827 /* Find CPU DAI from registered DAIs */
828 for_each_component(component) {
829 if (!snd_soc_is_matching_component(dlc, component))
831 for_each_component_dais(component, dai) {
832 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
833 && (!dai->driver->name
834 || strcmp(dai->driver->name, dlc->dai_name)))
843 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
846 * snd_soc_find_dai_link - Find a DAI link
849 * @id: DAI link ID to match
850 * @name: DAI link name to match, optional
851 * @stream_name: DAI link stream name to match, optional
853 * This function will search all existing DAI links of the soc card to
854 * find the link of the same ID. Since DAI links may not have their
855 * unique ID, so name and stream name should also match if being
858 * Return: pointer of DAI link, or NULL if not found.
860 struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
861 int id, const char *name,
862 const char *stream_name)
864 struct snd_soc_dai_link *link, *_link;
866 lockdep_assert_held(&client_mutex);
868 for_each_card_links_safe(card, link, _link) {
872 if (name && (!link->name || strcmp(name, link->name)))
875 if (stream_name && (!link->stream_name
876 || strcmp(stream_name, link->stream_name)))
884 EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);
886 static bool soc_is_dai_link_bound(struct snd_soc_card *card,
887 struct snd_soc_dai_link *dai_link)
889 struct snd_soc_pcm_runtime *rtd;
891 for_each_card_rtds(card, rtd) {
892 if (rtd->dai_link == dai_link)
899 static int soc_bind_dai_link(struct snd_soc_card *card,
900 struct snd_soc_dai_link *dai_link)
902 struct snd_soc_pcm_runtime *rtd;
903 struct snd_soc_dai_link_component *codec, *platform;
904 struct snd_soc_component *component;
907 if (dai_link->ignore)
910 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
912 if (soc_is_dai_link_bound(card, dai_link)) {
913 dev_dbg(card->dev, "ASoC: dai link %s already bound\n",
918 rtd = soc_new_pcm_runtime(card, dai_link);
922 /* FIXME: we need multi CPU support in the future */
923 rtd->cpu_dai = snd_soc_find_dai(dai_link->cpus);
925 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
926 dai_link->cpus->dai_name);
929 snd_soc_rtdcom_add(rtd, rtd->cpu_dai->component);
931 /* Find CODEC from registered CODECs */
932 rtd->num_codecs = dai_link->num_codecs;
933 for_each_link_codecs(dai_link, i, codec) {
934 rtd->codec_dais[i] = snd_soc_find_dai(codec);
935 if (!rtd->codec_dais[i]) {
936 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
941 snd_soc_rtdcom_add(rtd, rtd->codec_dais[i]->component);
944 /* Single codec links expect codec and codec_dai in runtime data */
945 rtd->codec_dai = rtd->codec_dais[0];
947 /* Find PLATFORM from registered PLATFORMs */
948 for_each_link_platforms(dai_link, i, platform) {
949 for_each_component(component) {
950 if (!snd_soc_is_matching_component(platform, component))
953 snd_soc_rtdcom_add(rtd, component);
957 soc_add_pcm_runtime(card, rtd);
961 soc_free_pcm_runtime(rtd);
962 return -EPROBE_DEFER;
965 static void soc_cleanup_component(struct snd_soc_component *component)
967 snd_soc_component_set_jack(component, NULL, NULL);
968 list_del(&component->card_list);
969 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
970 soc_cleanup_component_debugfs(component);
971 component->card = NULL;
972 if (!component->driver->module_get_upon_open)
973 module_put(component->dev->driver->owner);
976 static void soc_remove_component(struct snd_soc_component *component)
978 if (!component->card)
981 if (component->driver->remove)
982 component->driver->remove(component);
984 soc_cleanup_component(component);
987 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
991 if (!dai || !dai->probed || !dai->driver ||
992 dai->driver->remove_order != order)
995 if (dai->driver->remove) {
996 err = dai->driver->remove(dai);
999 "ASoC: failed to remove %s: %d\n",
1005 static void soc_remove_link_dais(struct snd_soc_card *card,
1006 struct snd_soc_pcm_runtime *rtd, int order)
1009 struct snd_soc_dai *codec_dai;
1011 /* unregister the rtd device */
1012 if (rtd->dev_registered) {
1013 device_unregister(rtd->dev);
1014 rtd->dev_registered = 0;
1017 /* remove the CODEC DAI */
1018 for_each_rtd_codec_dai(rtd, i, codec_dai)
1019 soc_remove_dai(codec_dai, order);
1021 soc_remove_dai(rtd->cpu_dai, order);
1024 static void soc_remove_link_components(struct snd_soc_card *card,
1025 struct snd_soc_pcm_runtime *rtd, int order)
1027 struct snd_soc_component *component;
1028 struct snd_soc_rtdcom_list *rtdcom;
1030 for_each_rtdcom(rtd, rtdcom) {
1031 component = rtdcom->component;
1033 if (component->driver->remove_order == order)
1034 soc_remove_component(component);
1038 static void soc_remove_dai_links(struct snd_soc_card *card)
1041 struct snd_soc_pcm_runtime *rtd;
1042 struct snd_soc_dai_link *link, *_link;
1044 for_each_comp_order(order) {
1045 for_each_card_rtds(card, rtd)
1046 soc_remove_link_dais(card, rtd, order);
1049 for_each_comp_order(order) {
1050 for_each_card_rtds(card, rtd)
1051 soc_remove_link_components(card, rtd, order);
1054 for_each_card_links_safe(card, link, _link) {
1055 if (link->dobj.type == SND_SOC_DOBJ_DAI_LINK)
1056 dev_warn(card->dev, "Topology forgot to remove link %s?\n",
1059 list_del(&link->list);
1063 static int soc_init_dai_link(struct snd_soc_card *card,
1064 struct snd_soc_dai_link *link)
1067 struct snd_soc_dai_link_component *codec, *platform;
1069 for_each_link_codecs(link, i, codec) {
1071 * Codec must be specified by 1 of name or OF node,
1072 * not both or neither.
1074 if (!!codec->name == !!codec->of_node) {
1075 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
1080 /* Codec DAI name must be specified */
1081 if (!codec->dai_name) {
1082 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
1088 * Defer card registration if codec component is not added to
1091 if (!soc_find_component(codec))
1092 return -EPROBE_DEFER;
1095 for_each_link_platforms(link, i, platform) {
1097 * Platform may be specified by either name or OF node, but it
1098 * can be left unspecified, then no components will be inserted
1099 * in the rtdcom list
1101 if (!!platform->name == !!platform->of_node) {
1103 "ASoC: Neither/both platform name/of_node are set for %s\n",
1109 * Defer card registration if platform component is not added to
1112 if (!soc_find_component(platform))
1113 return -EPROBE_DEFER;
1117 if (link->num_cpus > 1) {
1119 "ASoC: multi cpu is not yet supported %s\n",
1125 * CPU device may be specified by either name or OF node, but
1126 * can be left unspecified, and will be matched based on DAI
1129 if (link->cpus->name && link->cpus->of_node) {
1131 "ASoC: Neither/both cpu name/of_node are set for %s\n",
1137 * Defer card registartion if cpu dai component is not added to
1140 if ((link->cpus->of_node || link->cpus->name) &&
1141 !soc_find_component(link->cpus))
1142 return -EPROBE_DEFER;
1145 * At least one of CPU DAI name or CPU device name/node must be
1148 if (!link->cpus->dai_name &&
1149 !(link->cpus->name || link->cpus->of_node)) {
1151 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
1159 void snd_soc_disconnect_sync(struct device *dev)
1161 struct snd_soc_component *component =
1162 snd_soc_lookup_component(dev, NULL);
1164 if (!component || !component->card)
1167 snd_card_disconnect_sync(component->card->snd_card);
1169 EXPORT_SYMBOL_GPL(snd_soc_disconnect_sync);
1172 * snd_soc_add_dai_link - Add a DAI link dynamically
1173 * @card: The ASoC card to which the DAI link is added
1174 * @dai_link: The new DAI link to add
1176 * This function adds a DAI link to the ASoC card's link list.
1178 * Note: Topology can use this API to add DAI links when probing the
1179 * topology component. And machine drivers can still define static
1180 * DAI links in dai_link array.
1182 int snd_soc_add_dai_link(struct snd_soc_card *card,
1183 struct snd_soc_dai_link *dai_link)
1185 if (dai_link->dobj.type
1186 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1187 dev_err(card->dev, "Invalid dai link type %d\n",
1188 dai_link->dobj.type);
1192 lockdep_assert_held(&client_mutex);
1194 * Notify the machine driver for extra initialization
1195 * on the link created by topology.
1197 if (dai_link->dobj.type && card->add_dai_link)
1198 card->add_dai_link(card, dai_link);
1200 list_add_tail(&dai_link->list, &card->dai_link_list);
1204 EXPORT_SYMBOL_GPL(snd_soc_add_dai_link);
1207 * snd_soc_remove_dai_link - Remove a DAI link from the list
1208 * @card: The ASoC card that owns the link
1209 * @dai_link: The DAI link to remove
1211 * This function removes a DAI link from the ASoC card's link list.
1213 * For DAI links previously added by topology, topology should
1214 * remove them by using the dobj embedded in the link.
1216 void snd_soc_remove_dai_link(struct snd_soc_card *card,
1217 struct snd_soc_dai_link *dai_link)
1219 struct snd_soc_dai_link *link, *_link;
1221 if (dai_link->dobj.type
1222 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1223 dev_err(card->dev, "Invalid dai link type %d\n",
1224 dai_link->dobj.type);
1228 lockdep_assert_held(&client_mutex);
1230 * Notify the machine driver for extra destruction
1231 * on the link created by topology.
1233 if (dai_link->dobj.type && card->remove_dai_link)
1234 card->remove_dai_link(card, dai_link);
1236 for_each_card_links_safe(card, link, _link) {
1237 if (link == dai_link) {
1238 list_del(&link->list);
1243 EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);
1245 static void soc_set_of_name_prefix(struct snd_soc_component *component)
1247 struct device_node *component_of_node = soc_component_to_node(component);
1251 ret = of_property_read_string(component_of_node, "sound-name-prefix",
1254 component->name_prefix = str;
1257 static void soc_set_name_prefix(struct snd_soc_card *card,
1258 struct snd_soc_component *component)
1262 for (i = 0; i < card->num_configs && card->codec_conf; i++) {
1263 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1264 struct device_node *component_of_node = soc_component_to_node(component);
1266 if (map->of_node && component_of_node != map->of_node)
1268 if (map->dev_name && strcmp(component->name, map->dev_name))
1270 component->name_prefix = map->name_prefix;
1275 * If there is no configuration table or no match in the table,
1276 * check if a prefix is provided in the node
1278 soc_set_of_name_prefix(component);
1281 static int soc_probe_component(struct snd_soc_card *card,
1282 struct snd_soc_component *component)
1284 struct snd_soc_dapm_context *dapm =
1285 snd_soc_component_get_dapm(component);
1286 struct snd_soc_dai *dai;
1289 if (!strcmp(component->name, "snd-soc-dummy"))
1292 if (component->card) {
1293 if (component->card != card) {
1294 dev_err(component->dev,
1295 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1296 card->name, component->card->name);
1302 if (!component->driver->module_get_upon_open &&
1303 !try_module_get(component->dev->driver->owner))
1306 component->card = card;
1308 INIT_LIST_HEAD(&component->card_list);
1309 INIT_LIST_HEAD(&dapm->list);
1310 soc_set_name_prefix(card, component);
1312 soc_init_component_debugfs(component);
1314 if (component->driver->dapm_widgets) {
1315 ret = snd_soc_dapm_new_controls(dapm,
1316 component->driver->dapm_widgets,
1317 component->driver->num_dapm_widgets);
1320 dev_err(component->dev,
1321 "Failed to create new controls %d\n", ret);
1326 for_each_component_dais(component, dai) {
1327 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1329 dev_err(component->dev,
1330 "Failed to create DAI widgets %d\n", ret);
1335 if (component->driver->probe) {
1336 ret = component->driver->probe(component);
1338 dev_err(component->dev,
1339 "ASoC: failed to probe component %d\n", ret);
1343 WARN(dapm->idle_bias_off &&
1344 dapm->bias_level != SND_SOC_BIAS_OFF,
1345 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1348 /* machine specific init */
1349 if (component->init) {
1350 ret = component->init(component);
1352 dev_err(component->dev,
1353 "Failed to do machine specific init %d\n", ret);
1358 if (component->driver->controls)
1359 snd_soc_add_component_controls(component,
1360 component->driver->controls,
1361 component->driver->num_controls);
1362 if (component->driver->dapm_routes)
1363 snd_soc_dapm_add_routes(dapm,
1364 component->driver->dapm_routes,
1365 component->driver->num_dapm_routes);
1367 list_add(&dapm->list, &card->dapm_list);
1368 /* see for_each_card_components */
1369 list_add(&component->card_list, &card->component_dev_list);
1373 soc_cleanup_component(component);
1378 static void rtd_release(struct device *dev)
1383 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1388 /* register the rtd device */
1389 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1392 device_initialize(rtd->dev);
1393 rtd->dev->parent = rtd->card->dev;
1394 rtd->dev->release = rtd_release;
1395 rtd->dev->groups = soc_dev_attr_groups;
1396 dev_set_name(rtd->dev, "%s", name);
1397 dev_set_drvdata(rtd->dev, rtd);
1398 mutex_init(&rtd->pcm_mutex);
1399 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1400 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1401 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1402 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1403 ret = device_add(rtd->dev);
1405 /* calling put_device() here to free the rtd->dev */
1406 put_device(rtd->dev);
1407 dev_err(rtd->card->dev,
1408 "ASoC: failed to register runtime device: %d\n", ret);
1411 rtd->dev_registered = 1;
1415 static int soc_probe_link_components(struct snd_soc_card *card,
1416 struct snd_soc_pcm_runtime *rtd, int order)
1418 struct snd_soc_component *component;
1419 struct snd_soc_rtdcom_list *rtdcom;
1422 for_each_rtdcom(rtd, rtdcom) {
1423 component = rtdcom->component;
1425 if (component->driver->probe_order == order) {
1426 ret = soc_probe_component(card, component);
1435 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1438 dai->driver->probe_order != order)
1441 if (dai->driver->probe) {
1442 int ret = dai->driver->probe(dai);
1445 dev_err(dai->dev, "ASoC: failed to probe DAI %s: %d\n",
1456 static int soc_link_dai_pcm_new(struct snd_soc_dai **dais, int num_dais,
1457 struct snd_soc_pcm_runtime *rtd)
1461 for (i = 0; i < num_dais; ++i) {
1462 struct snd_soc_dai_driver *drv = dais[i]->driver;
1465 ret = drv->pcm_new(rtd, dais[i]);
1467 dev_err(dais[i]->dev,
1468 "ASoC: Failed to bind %s with pcm device\n",
1477 static int soc_probe_link_dais(struct snd_soc_card *card,
1478 struct snd_soc_pcm_runtime *rtd, int order)
1480 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1481 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1482 struct snd_soc_rtdcom_list *rtdcom;
1483 struct snd_soc_component *component;
1484 struct snd_soc_dai *codec_dai;
1487 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1488 card->name, rtd->num, order);
1490 /* set default power off timeout */
1491 rtd->pmdown_time = pmdown_time;
1493 ret = soc_probe_dai(cpu_dai, order);
1497 /* probe the CODEC DAI */
1498 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1499 ret = soc_probe_dai(codec_dai, order);
1504 /* complete DAI probe during last probe */
1505 if (order != SND_SOC_COMP_ORDER_LAST)
1508 /* do machine specific initialization */
1509 if (dai_link->init) {
1510 ret = dai_link->init(rtd);
1512 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1513 dai_link->name, ret);
1518 if (dai_link->dai_fmt) {
1519 ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1524 ret = soc_post_component_init(rtd, dai_link->name);
1528 #ifdef CONFIG_DEBUG_FS
1529 /* add DPCM sysfs entries */
1530 if (dai_link->dynamic)
1531 soc_dpcm_debugfs_add(rtd);
1537 * most drivers will register their PCMs using DAI link ordering but
1538 * topology based drivers can use the DAI link id field to set PCM
1539 * device number and then use rtd + a base offset of the BEs.
1541 for_each_rtdcom(rtd, rtdcom) {
1542 component = rtdcom->component;
1544 if (!component->driver->use_dai_pcm_id)
1547 if (rtd->dai_link->no_pcm)
1548 num += component->driver->be_pcm_base;
1550 num = rtd->dai_link->id;
1553 if (cpu_dai->driver->compress_new) {
1554 /* create compress_device" */
1555 ret = cpu_dai->driver->compress_new(rtd, num);
1557 dev_err(card->dev, "ASoC: can't create compress %s\n",
1558 dai_link->stream_name);
1561 } else if (!dai_link->params) {
1562 /* create the pcm */
1563 ret = soc_new_pcm(rtd, num);
1565 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1566 dai_link->stream_name, ret);
1569 ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd);
1572 ret = soc_link_dai_pcm_new(rtd->codec_dais,
1573 rtd->num_codecs, rtd);
1577 INIT_DELAYED_WORK(&rtd->delayed_work,
1578 codec2codec_close_delayed_work);
1584 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1586 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1587 struct snd_soc_component *component;
1588 struct snd_soc_dai_link_component dlc;
1590 if (aux_dev->codec_of_node || aux_dev->codec_name) {
1591 /* codecs, usually analog devices */
1592 dlc.name = aux_dev->codec_name;
1593 dlc.of_node = aux_dev->codec_of_node;
1594 component = soc_find_component(&dlc);
1597 dlc.name = of_node_full_name(dlc.of_node);
1600 } else if (aux_dev->name) {
1601 /* generic components */
1602 dlc.name = aux_dev->name;
1604 component = soc_find_component(&dlc);
1608 dev_err(card->dev, "ASoC: Invalid auxiliary device\n");
1612 component->init = aux_dev->init;
1613 list_add(&component->card_aux_list, &card->aux_comp_list);
1618 dev_err(card->dev, "ASoC: %s not registered\n", dlc.name);
1619 return -EPROBE_DEFER;
1622 static int soc_probe_aux_devices(struct snd_soc_card *card)
1624 struct snd_soc_component *comp;
1628 for_each_comp_order(order) {
1629 list_for_each_entry(comp, &card->aux_comp_list, card_aux_list) {
1630 if (comp->driver->probe_order == order) {
1631 ret = soc_probe_component(card, comp);
1634 "ASoC: failed to probe aux component %s %d\n",
1645 static void soc_remove_aux_devices(struct snd_soc_card *card)
1647 struct snd_soc_component *comp, *_comp;
1650 for_each_comp_order(order) {
1651 list_for_each_entry_safe(comp, _comp,
1652 &card->aux_comp_list, card_aux_list) {
1654 if (comp->driver->remove_order == order) {
1655 soc_remove_component(comp);
1656 /* remove it from the card's aux_comp_list */
1657 list_del(&comp->card_aux_list);
1664 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1665 * @rtd: The runtime for which the DAI link format should be changed
1666 * @dai_fmt: The new DAI link format
1668 * This function updates the DAI link format for all DAIs connected to the DAI
1669 * link for the specified runtime.
1671 * Note: For setups with a static format set the dai_fmt field in the
1672 * corresponding snd_dai_link struct instead of using this function.
1674 * Returns 0 on success, otherwise a negative error code.
1676 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1677 unsigned int dai_fmt)
1679 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1680 struct snd_soc_dai *codec_dai;
1684 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1685 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1686 if (ret != 0 && ret != -ENOTSUPP) {
1687 dev_warn(codec_dai->dev,
1688 "ASoC: Failed to set DAI format: %d\n", ret);
1694 * Flip the polarity for the "CPU" end of a CODEC<->CODEC link
1695 * the component which has non_legacy_dai_naming is Codec
1697 if (cpu_dai->component->driver->non_legacy_dai_naming) {
1698 unsigned int inv_dai_fmt;
1700 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1701 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1702 case SND_SOC_DAIFMT_CBM_CFM:
1703 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1705 case SND_SOC_DAIFMT_CBM_CFS:
1706 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1708 case SND_SOC_DAIFMT_CBS_CFM:
1709 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1711 case SND_SOC_DAIFMT_CBS_CFS:
1712 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1716 dai_fmt = inv_dai_fmt;
1719 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1720 if (ret != 0 && ret != -ENOTSUPP) {
1721 dev_warn(cpu_dai->dev,
1722 "ASoC: Failed to set DAI format: %d\n", ret);
1728 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1732 * Trim special characters, and replace '-' with '_' since '-' is used to
1733 * separate different DMI fields in the card long name. Only number and
1734 * alphabet characters and a few separator characters are kept.
1736 static void cleanup_dmi_name(char *name)
1740 for (i = 0; name[i]; i++) {
1741 if (isalnum(name[i]) || (name[i] == '.')
1742 || (name[i] == '_'))
1743 name[j++] = name[i];
1744 else if (name[i] == '-')
1752 * Check if a DMI field is valid, i.e. not containing any string
1753 * in the black list.
1755 static int is_dmi_valid(const char *field)
1759 while (dmi_blacklist[i]) {
1760 if (strstr(field, dmi_blacklist[i]))
1769 * snd_soc_set_dmi_name() - Register DMI names to card
1770 * @card: The card to register DMI names
1771 * @flavour: The flavour "differentiator" for the card amongst its peers.
1773 * An Intel machine driver may be used by many different devices but are
1774 * difficult for userspace to differentiate, since machine drivers ususally
1775 * use their own name as the card short name and leave the card long name
1776 * blank. To differentiate such devices and fix bugs due to lack of
1777 * device-specific configurations, this function allows DMI info to be used
1778 * as the sound card long name, in the format of
1779 * "vendor-product-version-board"
1780 * (Character '-' is used to separate different DMI fields here).
1781 * This will help the user space to load the device-specific Use Case Manager
1782 * (UCM) configurations for the card.
1784 * Possible card long names may be:
1785 * DellInc.-XPS139343-01-0310JH
1786 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1787 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1789 * This function also supports flavoring the card longname to provide
1790 * the extra differentiation, like "vendor-product-version-board-flavor".
1792 * We only keep number and alphabet characters and a few separator characters
1793 * in the card long name since UCM in the user space uses the card long names
1794 * as card configuration directory names and AudoConf cannot support special
1795 * charactors like SPACE.
1797 * Returns 0 on success, otherwise a negative error code.
1799 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1801 const char *vendor, *product, *product_version, *board;
1802 size_t longname_buf_size = sizeof(card->snd_card->longname);
1805 if (card->long_name)
1806 return 0; /* long name already set by driver or from DMI */
1808 /* make up dmi long name as: vendor.product.version.board */
1809 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1810 if (!vendor || !is_dmi_valid(vendor)) {
1811 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1815 snprintf(card->dmi_longname, sizeof(card->snd_card->longname),
1817 cleanup_dmi_name(card->dmi_longname);
1819 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1820 if (product && is_dmi_valid(product)) {
1821 len = strlen(card->dmi_longname);
1822 snprintf(card->dmi_longname + len,
1823 longname_buf_size - len,
1826 len++; /* skip the separator "-" */
1827 if (len < longname_buf_size)
1828 cleanup_dmi_name(card->dmi_longname + len);
1831 * some vendors like Lenovo may only put a self-explanatory
1832 * name in the product version field
1834 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1835 if (product_version && is_dmi_valid(product_version)) {
1836 len = strlen(card->dmi_longname);
1837 snprintf(card->dmi_longname + len,
1838 longname_buf_size - len,
1839 "-%s", product_version);
1842 if (len < longname_buf_size)
1843 cleanup_dmi_name(card->dmi_longname + len);
1847 board = dmi_get_system_info(DMI_BOARD_NAME);
1848 if (board && is_dmi_valid(board)) {
1849 len = strlen(card->dmi_longname);
1850 snprintf(card->dmi_longname + len,
1851 longname_buf_size - len,
1855 if (len < longname_buf_size)
1856 cleanup_dmi_name(card->dmi_longname + len);
1857 } else if (!product) {
1858 /* fall back to using legacy name */
1859 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1863 /* Add flavour to dmi long name */
1865 len = strlen(card->dmi_longname);
1866 snprintf(card->dmi_longname + len,
1867 longname_buf_size - len,
1871 if (len < longname_buf_size)
1872 cleanup_dmi_name(card->dmi_longname + len);
1875 /* set the card long name */
1876 card->long_name = card->dmi_longname;
1880 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1881 #endif /* CONFIG_DMI */
1883 static void soc_check_tplg_fes(struct snd_soc_card *card)
1885 struct snd_soc_component *component;
1886 const struct snd_soc_component_driver *comp_drv;
1887 struct snd_soc_dai_link *dai_link;
1890 for_each_component(component) {
1892 /* does this component override FEs ? */
1893 if (!component->driver->ignore_machine)
1896 /* for this machine ? */
1897 if (!strcmp(component->driver->ignore_machine,
1898 card->dev->driver->name))
1900 if (strcmp(component->driver->ignore_machine,
1901 dev_name(card->dev)))
1904 /* machine matches, so override the rtd data */
1905 for_each_card_prelinks(card, i, dai_link) {
1907 /* ignore this FE */
1908 if (dai_link->dynamic) {
1909 dai_link->ignore = true;
1913 dev_info(card->dev, "info: override FE DAI link %s\n",
1914 card->dai_link[i].name);
1916 /* override platform component */
1917 if (!dai_link->platforms) {
1918 dev_err(card->dev, "init platform error");
1921 dai_link->platforms->name = component->name;
1923 /* convert non BE into BE */
1924 dai_link->no_pcm = 1;
1926 /* override any BE fixups */
1927 dai_link->be_hw_params_fixup =
1928 component->driver->be_hw_params_fixup;
1931 * most BE links don't set stream name, so set it to
1932 * dai link name if it's NULL to help bind widgets.
1934 if (!dai_link->stream_name)
1935 dai_link->stream_name = dai_link->name;
1938 /* Inform userspace we are using alternate topology */
1939 if (component->driver->topology_name_prefix) {
1941 /* topology shortname created? */
1942 if (!card->topology_shortname_created) {
1943 comp_drv = component->driver;
1945 snprintf(card->topology_shortname, 32, "%s-%s",
1946 comp_drv->topology_name_prefix,
1948 card->topology_shortname_created = true;
1951 /* use topology shortname */
1952 card->name = card->topology_shortname;
1957 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1959 /* free the ALSA card at first; this syncs with pending operations */
1960 if (card->snd_card) {
1961 snd_card_free(card->snd_card);
1962 card->snd_card = NULL;
1965 /* remove and free each DAI */
1966 soc_remove_dai_links(card);
1967 soc_remove_pcm_runtimes(card);
1969 /* remove auxiliary devices */
1970 soc_remove_aux_devices(card);
1972 snd_soc_dapm_free(&card->dapm);
1973 soc_cleanup_card_debugfs(card);
1975 /* remove the card */
1982 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1984 struct snd_soc_pcm_runtime *rtd;
1985 struct snd_soc_dai_link *dai_link;
1988 mutex_lock(&client_mutex);
1989 for_each_card_prelinks(card, i, dai_link) {
1990 ret = soc_init_dai_link(card, dai_link);
1992 dev_err(card->dev, "ASoC: failed to init link %s: %d\n",
1993 dai_link->name, ret);
1994 mutex_unlock(&client_mutex);
1998 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
2000 card->dapm.bias_level = SND_SOC_BIAS_OFF;
2001 card->dapm.dev = card->dev;
2002 card->dapm.card = card;
2003 list_add(&card->dapm.list, &card->dapm_list);
2005 /* check whether any platform is ignore machine FE and using topology */
2006 soc_check_tplg_fes(card);
2009 for_each_card_prelinks(card, i, dai_link) {
2010 ret = soc_bind_dai_link(card, dai_link);
2015 /* bind aux_devs too */
2016 for (i = 0; i < card->num_aux_devs; i++) {
2017 ret = soc_bind_aux_dev(card, i);
2022 /* add predefined DAI links to the list */
2023 for_each_card_prelinks(card, i, dai_link)
2024 snd_soc_add_dai_link(card, dai_link);
2026 /* card bind complete so register a sound card */
2027 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2028 card->owner, 0, &card->snd_card);
2031 "ASoC: can't create sound card for card %s: %d\n",
2036 soc_init_card_debugfs(card);
2038 #ifdef CONFIG_DEBUG_FS
2039 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
2042 #ifdef CONFIG_PM_SLEEP
2043 /* deferred resume work */
2044 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
2047 if (card->dapm_widgets)
2048 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2049 card->num_dapm_widgets);
2051 if (card->of_dapm_widgets)
2052 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2053 card->num_of_dapm_widgets);
2055 /* initialise the sound card only once */
2057 ret = card->probe(card);
2062 /* probe all components used by DAI links on this card */
2063 for_each_comp_order(order) {
2064 for_each_card_rtds(card, rtd) {
2065 ret = soc_probe_link_components(card, rtd, order);
2068 "ASoC: failed to instantiate card %d\n",
2075 /* probe auxiliary components */
2076 ret = soc_probe_aux_devices(card);
2081 * Find new DAI links added during probing components and bind them.
2082 * Components with topology may bring new DAIs and DAI links.
2084 for_each_card_links(card, dai_link) {
2085 if (soc_is_dai_link_bound(card, dai_link))
2088 ret = soc_init_dai_link(card, dai_link);
2091 ret = soc_bind_dai_link(card, dai_link);
2096 /* probe all DAI links on this card */
2097 for_each_comp_order(order) {
2098 for_each_card_rtds(card, rtd) {
2099 ret = soc_probe_link_dais(card, rtd, order);
2102 "ASoC: failed to instantiate card %d\n",
2109 snd_soc_dapm_link_dai_widgets(card);
2110 snd_soc_dapm_connect_dai_link_widgets(card);
2113 snd_soc_add_card_controls(card, card->controls,
2114 card->num_controls);
2116 if (card->dapm_routes)
2117 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2118 card->num_dapm_routes);
2120 if (card->of_dapm_routes)
2121 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2122 card->num_of_dapm_routes);
2124 /* try to set some sane longname if DMI is available */
2125 snd_soc_set_dmi_name(card, NULL);
2127 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
2129 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
2130 "%s", card->long_name ? card->long_name : card->name);
2131 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
2132 "%s", card->driver_name ? card->driver_name : card->name);
2133 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
2134 switch (card->snd_card->driver[i]) {
2140 if (!isalnum(card->snd_card->driver[i]))
2141 card->snd_card->driver[i] = '_';
2146 if (card->late_probe) {
2147 ret = card->late_probe(card);
2149 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2155 snd_soc_dapm_new_widgets(card);
2157 ret = snd_card_register(card->snd_card);
2159 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2164 card->instantiated = 1;
2165 dapm_mark_endpoints_dirty(card);
2166 snd_soc_dapm_sync(&card->dapm);
2170 soc_cleanup_card_resources(card);
2172 mutex_unlock(&card->mutex);
2173 mutex_unlock(&client_mutex);
2178 /* probes a new socdev */
2179 static int soc_probe(struct platform_device *pdev)
2181 struct snd_soc_card *card = platform_get_drvdata(pdev);
2184 * no card, so machine driver should be registering card
2185 * we should not be here in that case so ret error
2190 dev_warn(&pdev->dev,
2191 "ASoC: machine %s should use snd_soc_register_card()\n",
2194 /* Bodge while we unpick instantiation */
2195 card->dev = &pdev->dev;
2197 return snd_soc_register_card(card);
2200 /* removes a socdev */
2201 static int soc_remove(struct platform_device *pdev)
2203 struct snd_soc_card *card = platform_get_drvdata(pdev);
2205 snd_soc_unregister_card(card);
2209 int snd_soc_poweroff(struct device *dev)
2211 struct snd_soc_card *card = dev_get_drvdata(dev);
2212 struct snd_soc_pcm_runtime *rtd;
2214 if (!card->instantiated)
2218 * Flush out pmdown_time work - we actually do want to run it
2219 * now, we're shutting down so no imminent restart.
2221 snd_soc_flush_all_delayed_work(card);
2223 snd_soc_dapm_shutdown(card);
2225 /* deactivate pins to sleep state */
2226 for_each_card_rtds(card, rtd) {
2227 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2228 struct snd_soc_dai *codec_dai;
2231 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2232 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2233 pinctrl_pm_select_sleep_state(codec_dai->dev);
2239 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2241 const struct dev_pm_ops snd_soc_pm_ops = {
2242 .suspend = snd_soc_suspend,
2243 .resume = snd_soc_resume,
2244 .freeze = snd_soc_suspend,
2245 .thaw = snd_soc_resume,
2246 .poweroff = snd_soc_poweroff,
2247 .restore = snd_soc_resume,
2249 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2251 /* ASoC platform driver */
2252 static struct platform_driver soc_driver = {
2254 .name = "soc-audio",
2255 .pm = &snd_soc_pm_ops,
2258 .remove = soc_remove,
2262 * snd_soc_cnew - create new control
2263 * @_template: control template
2264 * @data: control private data
2265 * @long_name: control long name
2266 * @prefix: control name prefix
2268 * Create a new mixer control from a template control.
2270 * Returns 0 for success, else error.
2272 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2273 void *data, const char *long_name,
2276 struct snd_kcontrol_new template;
2277 struct snd_kcontrol *kcontrol;
2280 memcpy(&template, _template, sizeof(template));
2284 long_name = template.name;
2287 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2291 template.name = name;
2293 template.name = long_name;
2296 kcontrol = snd_ctl_new1(&template, data);
2302 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2304 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2305 const struct snd_kcontrol_new *controls, int num_controls,
2306 const char *prefix, void *data)
2310 for (i = 0; i < num_controls; i++) {
2311 const struct snd_kcontrol_new *control = &controls[i];
2313 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2314 control->name, prefix));
2316 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2317 control->name, err);
2325 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2328 struct snd_card *card = soc_card->snd_card;
2329 struct snd_kcontrol *kctl;
2331 if (unlikely(!name))
2334 list_for_each_entry(kctl, &card->controls, list)
2335 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2339 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2342 * snd_soc_add_component_controls - Add an array of controls to a component.
2344 * @component: Component to add controls to
2345 * @controls: Array of controls to add
2346 * @num_controls: Number of elements in the array
2348 * Return: 0 for success, else error.
2350 int snd_soc_add_component_controls(struct snd_soc_component *component,
2351 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2353 struct snd_card *card = component->card->snd_card;
2355 return snd_soc_add_controls(card, component->dev, controls,
2356 num_controls, component->name_prefix, component);
2358 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2361 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2362 * Convenience function to add a list of controls.
2364 * @soc_card: SoC card to add controls to
2365 * @controls: array of controls to add
2366 * @num_controls: number of elements in the array
2368 * Return 0 for success, else error.
2370 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2371 const struct snd_kcontrol_new *controls, int num_controls)
2373 struct snd_card *card = soc_card->snd_card;
2375 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2378 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2381 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2382 * Convienience function to add a list of controls.
2384 * @dai: DAI to add controls to
2385 * @controls: array of controls to add
2386 * @num_controls: number of elements in the array
2388 * Return 0 for success, else error.
2390 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2391 const struct snd_kcontrol_new *controls, int num_controls)
2393 struct snd_card *card = dai->component->card->snd_card;
2395 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2398 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2401 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2403 * @clk_id: DAI specific clock ID
2404 * @freq: new clock frequency in Hz
2405 * @dir: new clock direction - input/output.
2407 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2409 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2410 unsigned int freq, int dir)
2412 if (dai->driver->ops->set_sysclk)
2413 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2415 return snd_soc_component_set_sysclk(dai->component, clk_id, 0,
2418 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2421 * snd_soc_component_set_sysclk - configure COMPONENT system or master clock.
2422 * @component: COMPONENT
2423 * @clk_id: DAI specific clock ID
2424 * @source: Source for the clock
2425 * @freq: new clock frequency in Hz
2426 * @dir: new clock direction - input/output.
2428 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2430 int snd_soc_component_set_sysclk(struct snd_soc_component *component,
2431 int clk_id, int source, unsigned int freq,
2434 if (component->driver->set_sysclk)
2435 return component->driver->set_sysclk(component, clk_id, source,
2440 EXPORT_SYMBOL_GPL(snd_soc_component_set_sysclk);
2443 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2445 * @div_id: DAI specific clock divider ID
2446 * @div: new clock divisor.
2448 * Configures the clock dividers. This is used to derive the best DAI bit and
2449 * frame clocks from the system or master clock. It's best to set the DAI bit
2450 * and frame clocks as low as possible to save system power.
2452 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2453 int div_id, int div)
2455 if (dai->driver->ops->set_clkdiv)
2456 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2460 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2463 * snd_soc_dai_set_pll - configure DAI PLL.
2465 * @pll_id: DAI specific PLL ID
2466 * @source: DAI specific source for the PLL
2467 * @freq_in: PLL input clock frequency in Hz
2468 * @freq_out: requested PLL output clock frequency in Hz
2470 * Configures and enables PLL to generate output clock based on input clock.
2472 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2473 unsigned int freq_in, unsigned int freq_out)
2475 if (dai->driver->ops->set_pll)
2476 return dai->driver->ops->set_pll(dai, pll_id, source,
2479 return snd_soc_component_set_pll(dai->component, pll_id, source,
2482 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2485 * snd_soc_component_set_pll - configure component PLL.
2486 * @component: COMPONENT
2487 * @pll_id: DAI specific PLL ID
2488 * @source: DAI specific source for the PLL
2489 * @freq_in: PLL input clock frequency in Hz
2490 * @freq_out: requested PLL output clock frequency in Hz
2492 * Configures and enables PLL to generate output clock based on input clock.
2494 int snd_soc_component_set_pll(struct snd_soc_component *component, int pll_id,
2495 int source, unsigned int freq_in,
2496 unsigned int freq_out)
2498 if (component->driver->set_pll)
2499 return component->driver->set_pll(component, pll_id, source,
2504 EXPORT_SYMBOL_GPL(snd_soc_component_set_pll);
2507 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2509 * @ratio: Ratio of BCLK to Sample rate.
2511 * Configures the DAI for a preset BCLK to sample rate ratio.
2513 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2515 if (dai->driver->ops->set_bclk_ratio)
2516 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2520 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2523 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2525 * @fmt: SND_SOC_DAIFMT_* format value.
2527 * Configures the DAI hardware format and clocking.
2529 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2531 if (dai->driver->ops->set_fmt == NULL)
2533 return dai->driver->ops->set_fmt(dai, fmt);
2535 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2538 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2539 * @slots: Number of slots in use.
2540 * @tx_mask: bitmask representing active TX slots.
2541 * @rx_mask: bitmask representing active RX slots.
2543 * Generates the TDM tx and rx slot default masks for DAI.
2545 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2546 unsigned int *tx_mask,
2547 unsigned int *rx_mask)
2549 if (*tx_mask || *rx_mask)
2555 *tx_mask = (1 << slots) - 1;
2556 *rx_mask = (1 << slots) - 1;
2562 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2563 * @dai: The DAI to configure
2564 * @tx_mask: bitmask representing active TX slots.
2565 * @rx_mask: bitmask representing active RX slots.
2566 * @slots: Number of slots in use.
2567 * @slot_width: Width in bits for each slot.
2569 * This function configures the specified DAI for TDM operation. @slot contains
2570 * the total number of slots of the TDM stream and @slot_with the width of each
2571 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2572 * active slots of the TDM stream for the specified DAI, i.e. which slots the
2573 * DAI should write to or read from. If a bit is set the corresponding slot is
2574 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2575 * the first slot, bit 1 to the second slot and so on. The first active slot
2576 * maps to the first channel of the DAI, the second active slot to the second
2577 * channel and so on.
2579 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2580 * @rx_mask and @slot_width will be ignored.
2582 * Returns 0 on success, a negative error code otherwise.
2584 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2585 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2587 if (dai->driver->ops->xlate_tdm_slot_mask)
2588 dai->driver->ops->xlate_tdm_slot_mask(slots,
2589 &tx_mask, &rx_mask);
2591 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2593 dai->tx_mask = tx_mask;
2594 dai->rx_mask = rx_mask;
2596 if (dai->driver->ops->set_tdm_slot)
2597 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2602 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2605 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2607 * @tx_num: how many TX channels
2608 * @tx_slot: pointer to an array which imply the TX slot number channel
2610 * @rx_num: how many RX channels
2611 * @rx_slot: pointer to an array which imply the RX slot number channel
2614 * configure the relationship between channel number and TDM slot number.
2616 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2617 unsigned int tx_num, unsigned int *tx_slot,
2618 unsigned int rx_num, unsigned int *rx_slot)
2620 if (dai->driver->ops->set_channel_map)
2621 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2626 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2629 * snd_soc_dai_get_channel_map - Get DAI audio channel map
2631 * @tx_num: how many TX channels
2632 * @tx_slot: pointer to an array which imply the TX slot number channel
2634 * @rx_num: how many RX channels
2635 * @rx_slot: pointer to an array which imply the RX slot number channel
2638 int snd_soc_dai_get_channel_map(struct snd_soc_dai *dai,
2639 unsigned int *tx_num, unsigned int *tx_slot,
2640 unsigned int *rx_num, unsigned int *rx_slot)
2642 if (dai->driver->ops->get_channel_map)
2643 return dai->driver->ops->get_channel_map(dai, tx_num, tx_slot,
2648 EXPORT_SYMBOL_GPL(snd_soc_dai_get_channel_map);
2651 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2653 * @tristate: tristate enable
2655 * Tristates the DAI so that others can use it.
2657 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2659 if (dai->driver->ops->set_tristate)
2660 return dai->driver->ops->set_tristate(dai, tristate);
2664 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2667 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2669 * @mute: mute enable
2670 * @direction: stream to mute
2672 * Mutes the DAI DAC.
2674 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2677 if (dai->driver->ops->mute_stream)
2678 return dai->driver->ops->mute_stream(dai, mute, direction);
2679 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2680 dai->driver->ops->digital_mute)
2681 return dai->driver->ops->digital_mute(dai, mute);
2685 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2687 static int snd_soc_bind_card(struct snd_soc_card *card)
2689 struct snd_soc_pcm_runtime *rtd;
2692 ret = snd_soc_instantiate_card(card);
2696 /* deactivate pins to sleep state */
2697 for_each_card_rtds(card, rtd) {
2698 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2699 struct snd_soc_dai *codec_dai;
2702 for_each_rtd_codec_dai(rtd, j, codec_dai) {
2703 if (!codec_dai->active)
2704 pinctrl_pm_select_sleep_state(codec_dai->dev);
2707 if (!cpu_dai->active)
2708 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2715 * snd_soc_register_card - Register a card with the ASoC core
2717 * @card: Card to register
2720 int snd_soc_register_card(struct snd_soc_card *card)
2722 if (!card->name || !card->dev)
2725 dev_set_drvdata(card->dev, card);
2727 snd_soc_initialize_card_lists(card);
2729 INIT_LIST_HEAD(&card->dai_link_list);
2731 INIT_LIST_HEAD(&card->rtd_list);
2734 INIT_LIST_HEAD(&card->dapm_dirty);
2735 INIT_LIST_HEAD(&card->dobj_list);
2736 card->instantiated = 0;
2737 mutex_init(&card->mutex);
2738 mutex_init(&card->dapm_mutex);
2739 spin_lock_init(&card->dpcm_lock);
2741 return snd_soc_bind_card(card);
2743 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2745 static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
2747 struct snd_soc_pcm_runtime *rtd;
2750 if (card->instantiated) {
2751 card->instantiated = false;
2752 snd_soc_dapm_shutdown(card);
2753 snd_soc_flush_all_delayed_work(card);
2755 /* remove all components used by DAI links on this card */
2756 for_each_comp_order(order) {
2757 for_each_card_rtds(card, rtd) {
2758 soc_remove_link_components(card, rtd, order);
2762 soc_cleanup_card_resources(card);
2764 list_add(&card->list, &unbind_card_list);
2767 list_del(&card->list);
2772 * snd_soc_unregister_card - Unregister a card with the ASoC core
2774 * @card: Card to unregister
2777 int snd_soc_unregister_card(struct snd_soc_card *card)
2779 mutex_lock(&client_mutex);
2780 snd_soc_unbind_card(card, true);
2781 mutex_unlock(&client_mutex);
2782 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2786 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2789 * Simplify DAI link configuration by removing ".-1" from device names
2790 * and sanitizing names.
2792 static char *fmt_single_name(struct device *dev, int *id)
2794 char *found, name[NAME_SIZE];
2797 if (dev_name(dev) == NULL)
2800 strlcpy(name, dev_name(dev), NAME_SIZE);
2802 /* are we a "%s.%d" name (platform and SPI components) */
2803 found = strstr(name, dev->driver->name);
2806 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2808 /* discard ID from name if ID == -1 */
2810 found[strlen(dev->driver->name)] = '\0';
2814 /* I2C component devices are named "bus-addr" */
2815 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2816 char tmp[NAME_SIZE];
2818 /* create unique ID number from I2C addr and bus */
2819 *id = ((id1 & 0xffff) << 16) + id2;
2821 /* sanitize component name for DAI link creation */
2822 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name,
2824 strlcpy(name, tmp, NAME_SIZE);
2829 return kstrdup(name, GFP_KERNEL);
2833 * Simplify DAI link naming for single devices with multiple DAIs by removing
2834 * any ".-1" and using the DAI name (instead of device name).
2836 static inline char *fmt_multiple_name(struct device *dev,
2837 struct snd_soc_dai_driver *dai_drv)
2839 if (dai_drv->name == NULL) {
2841 "ASoC: error - multiple DAI %s registered with no name\n",
2846 return kstrdup(dai_drv->name, GFP_KERNEL);
2850 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2852 * @component: The component for which the DAIs should be unregistered
2854 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2856 struct snd_soc_dai *dai, *_dai;
2858 for_each_component_dais_safe(component, dai, _dai) {
2859 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2861 list_del(&dai->list);
2867 /* Create a DAI and add it to the component's DAI list */
2868 static struct snd_soc_dai *soc_add_dai(struct snd_soc_component *component,
2869 struct snd_soc_dai_driver *dai_drv,
2870 bool legacy_dai_naming)
2872 struct device *dev = component->dev;
2873 struct snd_soc_dai *dai;
2875 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2877 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2882 * Back in the old days when we still had component-less DAIs,
2883 * instead of having a static name, component-less DAIs would
2884 * inherit the name of the parent device so it is possible to
2885 * register multiple instances of the DAI. We still need to keep
2886 * the same naming style even though those DAIs are not
2887 * component-less anymore.
2889 if (legacy_dai_naming &&
2890 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2891 dai->name = fmt_single_name(dev, &dai->id);
2893 dai->name = fmt_multiple_name(dev, dai_drv);
2895 dai->id = dai_drv->id;
2897 dai->id = component->num_dai;
2899 if (dai->name == NULL) {
2904 dai->component = component;
2906 dai->driver = dai_drv;
2907 if (!dai->driver->ops)
2908 dai->driver->ops = &null_dai_ops;
2910 /* see for_each_component_dais */
2911 list_add_tail(&dai->list, &component->dai_list);
2912 component->num_dai++;
2914 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2919 * snd_soc_register_dais - Register a DAI with the ASoC core
2921 * @component: The component the DAIs are registered for
2922 * @dai_drv: DAI driver to use for the DAIs
2923 * @count: Number of DAIs
2925 static int snd_soc_register_dais(struct snd_soc_component *component,
2926 struct snd_soc_dai_driver *dai_drv,
2929 struct device *dev = component->dev;
2930 struct snd_soc_dai *dai;
2934 dev_dbg(dev, "ASoC: dai register %s #%zu\n", dev_name(dev), count);
2936 for (i = 0; i < count; i++) {
2938 dai = soc_add_dai(component, dai_drv + i, count == 1 &&
2939 !component->driver->non_legacy_dai_naming);
2949 snd_soc_unregister_dais(component);
2955 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2957 * @component: The component the DAIs are registered for
2958 * @dai_drv: DAI driver to use for the DAI
2960 * Topology can use this API to register DAIs when probing a component.
2961 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2962 * will be freed in the component cleanup.
2964 int snd_soc_register_dai(struct snd_soc_component *component,
2965 struct snd_soc_dai_driver *dai_drv)
2967 struct snd_soc_dapm_context *dapm =
2968 snd_soc_component_get_dapm(component);
2969 struct snd_soc_dai *dai;
2972 if (dai_drv->dobj.type != SND_SOC_DOBJ_PCM) {
2973 dev_err(component->dev, "Invalid dai type %d\n",
2974 dai_drv->dobj.type);
2978 lockdep_assert_held(&client_mutex);
2979 dai = soc_add_dai(component, dai_drv, false);
2984 * Create the DAI widgets here. After adding DAIs, topology may
2985 * also add routes that need these widgets as source or sink.
2987 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
2989 dev_err(component->dev,
2990 "Failed to create DAI widgets %d\n", ret);
2995 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2997 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2998 enum snd_soc_dapm_type type, int subseq)
3000 struct snd_soc_component *component = dapm->component;
3002 component->driver->seq_notifier(component, type, subseq);
3005 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
3008 struct snd_soc_component *component = dapm->component;
3010 return component->driver->stream_event(component, event);
3013 static int snd_soc_component_set_bias_level(struct snd_soc_dapm_context *dapm,
3014 enum snd_soc_bias_level level)
3016 struct snd_soc_component *component = dapm->component;
3018 return component->driver->set_bias_level(component, level);
3021 static int snd_soc_component_initialize(struct snd_soc_component *component,
3022 const struct snd_soc_component_driver *driver, struct device *dev)
3024 struct snd_soc_dapm_context *dapm;
3026 component->name = fmt_single_name(dev, &component->id);
3027 if (!component->name) {
3028 dev_err(dev, "ASoC: Failed to allocate name\n");
3032 component->dev = dev;
3033 component->driver = driver;
3035 dapm = snd_soc_component_get_dapm(component);
3037 dapm->component = component;
3038 dapm->bias_level = SND_SOC_BIAS_OFF;
3039 dapm->idle_bias_off = !driver->idle_bias_on;
3040 dapm->suspend_bias_off = driver->suspend_bias_off;
3041 if (driver->seq_notifier)
3042 dapm->seq_notifier = snd_soc_component_seq_notifier;
3043 if (driver->stream_event)
3044 dapm->stream_event = snd_soc_component_stream_event;
3045 if (driver->set_bias_level)
3046 dapm->set_bias_level = snd_soc_component_set_bias_level;
3048 INIT_LIST_HEAD(&component->dai_list);
3049 mutex_init(&component->io_mutex);
3054 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
3056 int val_bytes = regmap_get_val_bytes(component->regmap);
3058 /* Errors are legitimate for non-integer byte multiples */
3060 component->val_bytes = val_bytes;
3063 #ifdef CONFIG_REGMAP
3066 * snd_soc_component_init_regmap() - Initialize regmap instance for the
3068 * @component: The component for which to initialize the regmap instance
3069 * @regmap: The regmap instance that should be used by the component
3071 * This function allows deferred assignment of the regmap instance that is
3072 * associated with the component. Only use this if the regmap instance is not
3073 * yet ready when the component is registered. The function must also be called
3074 * before the first IO attempt of the component.
3076 void snd_soc_component_init_regmap(struct snd_soc_component *component,
3077 struct regmap *regmap)
3079 component->regmap = regmap;
3080 snd_soc_component_setup_regmap(component);
3082 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
3085 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the
3087 * @component: The component for which to de-initialize the regmap instance
3089 * Calls regmap_exit() on the regmap instance associated to the component and
3090 * removes the regmap instance from the component.
3092 * This function should only be used if snd_soc_component_init_regmap() was used
3093 * to initialize the regmap instance.
3095 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
3097 regmap_exit(component->regmap);
3098 component->regmap = NULL;
3100 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
3104 static void snd_soc_component_add(struct snd_soc_component *component)
3106 mutex_lock(&client_mutex);
3108 if (!component->driver->write && !component->driver->read) {
3109 if (!component->regmap)
3110 component->regmap = dev_get_regmap(component->dev,
3112 if (component->regmap)
3113 snd_soc_component_setup_regmap(component);
3116 /* see for_each_component */
3117 list_add(&component->list, &component_list);
3118 INIT_LIST_HEAD(&component->dobj_list);
3120 mutex_unlock(&client_mutex);
3123 static void snd_soc_component_cleanup(struct snd_soc_component *component)
3125 snd_soc_unregister_dais(component);
3126 kfree(component->name);
3129 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
3131 struct snd_soc_card *card = component->card;
3134 snd_soc_unbind_card(card, false);
3136 list_del(&component->list);
3139 #define ENDIANNESS_MAP(name) \
3140 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
3141 static u64 endianness_format_map[] = {
3142 ENDIANNESS_MAP(S16_),
3143 ENDIANNESS_MAP(U16_),
3144 ENDIANNESS_MAP(S24_),
3145 ENDIANNESS_MAP(U24_),
3146 ENDIANNESS_MAP(S32_),
3147 ENDIANNESS_MAP(U32_),
3148 ENDIANNESS_MAP(S24_3),
3149 ENDIANNESS_MAP(U24_3),
3150 ENDIANNESS_MAP(S20_3),
3151 ENDIANNESS_MAP(U20_3),
3152 ENDIANNESS_MAP(S18_3),
3153 ENDIANNESS_MAP(U18_3),
3154 ENDIANNESS_MAP(FLOAT_),
3155 ENDIANNESS_MAP(FLOAT64_),
3156 ENDIANNESS_MAP(IEC958_SUBFRAME_),
3160 * Fix up the DAI formats for endianness: codecs don't actually see
3161 * the endianness of the data but we're using the CPU format
3162 * definitions which do need to include endianness so we ensure that
3163 * codec DAIs always have both big and little endian variants set.
3165 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
3169 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
3170 if (stream->formats & endianness_format_map[i])
3171 stream->formats |= endianness_format_map[i];
3174 static void snd_soc_try_rebind_card(void)
3176 struct snd_soc_card *card, *c;
3178 if (!list_empty(&unbind_card_list)) {
3179 list_for_each_entry_safe(card, c, &unbind_card_list, list) {
3180 if (!snd_soc_bind_card(card))
3181 list_del(&card->list);
3186 int snd_soc_add_component(struct device *dev,
3187 struct snd_soc_component *component,
3188 const struct snd_soc_component_driver *component_driver,
3189 struct snd_soc_dai_driver *dai_drv,
3195 ret = snd_soc_component_initialize(component, component_driver, dev);
3199 if (component_driver->endianness) {
3200 for (i = 0; i < num_dai; i++) {
3201 convert_endianness_formats(&dai_drv[i].playback);
3202 convert_endianness_formats(&dai_drv[i].capture);
3206 ret = snd_soc_register_dais(component, dai_drv, num_dai);
3208 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3212 snd_soc_component_add(component);
3213 snd_soc_try_rebind_card();
3218 snd_soc_component_cleanup(component);
3222 EXPORT_SYMBOL_GPL(snd_soc_add_component);
3224 int snd_soc_register_component(struct device *dev,
3225 const struct snd_soc_component_driver *component_driver,
3226 struct snd_soc_dai_driver *dai_drv,
3229 struct snd_soc_component *component;
3231 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
3235 return snd_soc_add_component(dev, component, component_driver,
3238 EXPORT_SYMBOL_GPL(snd_soc_register_component);
3241 * snd_soc_unregister_component - Unregister all related component
3242 * from the ASoC core
3244 * @dev: The device to unregister
3246 static int __snd_soc_unregister_component(struct device *dev)
3248 struct snd_soc_component *component;
3251 mutex_lock(&client_mutex);
3252 for_each_component(component) {
3253 if (dev != component->dev)
3256 snd_soc_tplg_component_remove(component,
3257 SND_SOC_TPLG_INDEX_ALL);
3258 snd_soc_component_del_unlocked(component);
3262 mutex_unlock(&client_mutex);
3265 snd_soc_component_cleanup(component);
3270 void snd_soc_unregister_component(struct device *dev)
3272 while (__snd_soc_unregister_component(dev))
3275 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
3277 struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
3278 const char *driver_name)
3280 struct snd_soc_component *component;
3281 struct snd_soc_component *ret;
3284 mutex_lock(&client_mutex);
3285 for_each_component(component) {
3286 if (dev != component->dev)
3290 (driver_name != component->driver->name) &&
3291 (strcmp(component->driver->name, driver_name) != 0))
3297 mutex_unlock(&client_mutex);
3301 EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
3303 /* Retrieve a card's name from device tree */
3304 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3305 const char *propname)
3307 struct device_node *np;
3311 pr_err("card->dev is not set before calling %s\n", __func__);
3315 np = card->dev->of_node;
3317 ret = of_property_read_string_index(np, propname, 0, &card->name);
3319 * EINVAL means the property does not exist. This is fine providing
3320 * card->name was previously set, which is checked later in
3321 * snd_soc_register_card.
3323 if (ret < 0 && ret != -EINVAL) {
3325 "ASoC: Property '%s' could not be read: %d\n",
3332 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3334 static const struct snd_soc_dapm_widget simple_widgets[] = {
3335 SND_SOC_DAPM_MIC("Microphone", NULL),
3336 SND_SOC_DAPM_LINE("Line", NULL),
3337 SND_SOC_DAPM_HP("Headphone", NULL),
3338 SND_SOC_DAPM_SPK("Speaker", NULL),
3341 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3342 const char *propname)
3344 struct device_node *np = card->dev->of_node;
3345 struct snd_soc_dapm_widget *widgets;
3346 const char *template, *wname;
3347 int i, j, num_widgets, ret;
3349 num_widgets = of_property_count_strings(np, propname);
3350 if (num_widgets < 0) {
3352 "ASoC: Property '%s' does not exist\n", propname);
3355 if (num_widgets & 1) {
3357 "ASoC: Property '%s' length is not even\n", propname);
3363 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3368 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3372 "ASoC: Could not allocate memory for widgets\n");
3376 for (i = 0; i < num_widgets; i++) {
3377 ret = of_property_read_string_index(np, propname,
3381 "ASoC: Property '%s' index %d read error:%d\n",
3382 propname, 2 * i, ret);
3386 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3387 if (!strncmp(template, simple_widgets[j].name,
3388 strlen(simple_widgets[j].name))) {
3389 widgets[i] = simple_widgets[j];
3394 if (j >= ARRAY_SIZE(simple_widgets)) {
3396 "ASoC: DAPM widget '%s' is not supported\n",
3401 ret = of_property_read_string_index(np, propname,
3406 "ASoC: Property '%s' index %d read error:%d\n",
3407 propname, (2 * i) + 1, ret);
3411 widgets[i].name = wname;
3414 card->of_dapm_widgets = widgets;
3415 card->num_of_dapm_widgets = num_widgets;
3419 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3421 int snd_soc_of_get_slot_mask(struct device_node *np,
3422 const char *prop_name,
3426 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3432 for (i = 0; i < val; i++)
3433 if (be32_to_cpup(&of_slot_mask[i]))
3438 EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
3440 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3441 unsigned int *tx_mask,
3442 unsigned int *rx_mask,
3443 unsigned int *slots,
3444 unsigned int *slot_width)
3450 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3452 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3454 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3455 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3463 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3464 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3474 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3476 void snd_soc_of_parse_node_prefix(struct device_node *np,
3477 struct snd_soc_codec_conf *codec_conf,
3478 struct device_node *of_node,
3479 const char *propname)
3484 ret = of_property_read_string(np, propname, &str);
3486 /* no prefix is not error */
3490 codec_conf->of_node = of_node;
3491 codec_conf->name_prefix = str;
3493 EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
3495 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3496 const char *propname)
3498 struct device_node *np = card->dev->of_node;
3500 struct snd_soc_dapm_route *routes;
3503 num_routes = of_property_count_strings(np, propname);
3504 if (num_routes < 0 || num_routes & 1) {
3506 "ASoC: Property '%s' does not exist or its length is not even\n",
3512 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3517 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3521 "ASoC: Could not allocate DAPM route table\n");
3525 for (i = 0; i < num_routes; i++) {
3526 ret = of_property_read_string_index(np, propname,
3527 2 * i, &routes[i].sink);
3530 "ASoC: Property '%s' index %d could not be read: %d\n",
3531 propname, 2 * i, ret);
3534 ret = of_property_read_string_index(np, propname,
3535 (2 * i) + 1, &routes[i].source);
3538 "ASoC: Property '%s' index %d could not be read: %d\n",
3539 propname, (2 * i) + 1, ret);
3544 card->num_of_dapm_routes = num_routes;
3545 card->of_dapm_routes = routes;
3549 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3551 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3553 struct device_node **bitclkmaster,
3554 struct device_node **framemaster)
3558 unsigned int format = 0;
3564 } of_fmt_table[] = {
3565 { "i2s", SND_SOC_DAIFMT_I2S },
3566 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3567 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3568 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3569 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3570 { "ac97", SND_SOC_DAIFMT_AC97 },
3571 { "pdm", SND_SOC_DAIFMT_PDM},
3572 { "msb", SND_SOC_DAIFMT_MSB },
3573 { "lsb", SND_SOC_DAIFMT_LSB },
3580 * check "dai-format = xxx"
3581 * or "[prefix]format = xxx"
3582 * SND_SOC_DAIFMT_FORMAT_MASK area
3584 ret = of_property_read_string(np, "dai-format", &str);
3586 snprintf(prop, sizeof(prop), "%sformat", prefix);
3587 ret = of_property_read_string(np, prop, &str);
3590 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3591 if (strcmp(str, of_fmt_table[i].name) == 0) {
3592 format |= of_fmt_table[i].val;
3599 * check "[prefix]continuous-clock"
3600 * SND_SOC_DAIFMT_CLOCK_MASK area
3602 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3603 if (of_property_read_bool(np, prop))
3604 format |= SND_SOC_DAIFMT_CONT;
3606 format |= SND_SOC_DAIFMT_GATED;
3609 * check "[prefix]bitclock-inversion"
3610 * check "[prefix]frame-inversion"
3611 * SND_SOC_DAIFMT_INV_MASK area
3613 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3614 bit = !!of_get_property(np, prop, NULL);
3616 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3617 frame = !!of_get_property(np, prop, NULL);
3619 switch ((bit << 4) + frame) {
3621 format |= SND_SOC_DAIFMT_IB_IF;
3624 format |= SND_SOC_DAIFMT_IB_NF;
3627 format |= SND_SOC_DAIFMT_NB_IF;
3630 /* SND_SOC_DAIFMT_NB_NF is default */
3635 * check "[prefix]bitclock-master"
3636 * check "[prefix]frame-master"
3637 * SND_SOC_DAIFMT_MASTER_MASK area
3639 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3640 bit = !!of_get_property(np, prop, NULL);
3641 if (bit && bitclkmaster)
3642 *bitclkmaster = of_parse_phandle(np, prop, 0);
3644 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3645 frame = !!of_get_property(np, prop, NULL);
3646 if (frame && framemaster)
3647 *framemaster = of_parse_phandle(np, prop, 0);
3649 switch ((bit << 4) + frame) {
3651 format |= SND_SOC_DAIFMT_CBM_CFM;
3654 format |= SND_SOC_DAIFMT_CBM_CFS;
3657 format |= SND_SOC_DAIFMT_CBS_CFM;
3660 format |= SND_SOC_DAIFMT_CBS_CFS;
3666 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3668 int snd_soc_get_dai_id(struct device_node *ep)
3670 struct snd_soc_component *component;
3671 struct snd_soc_dai_link_component dlc;
3674 dlc.of_node = of_graph_get_port_parent(ep);
3677 * For example HDMI case, HDMI has video/sound port,
3678 * but ALSA SoC needs sound port number only.
3679 * Thus counting HDMI DT port/endpoint doesn't work.
3680 * Then, it should have .of_xlate_dai_id
3683 mutex_lock(&client_mutex);
3684 component = soc_find_component(&dlc);
3686 component->driver->of_xlate_dai_id)
3687 ret = component->driver->of_xlate_dai_id(component, ep);
3688 mutex_unlock(&client_mutex);
3690 of_node_put(dlc.of_node);
3694 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3696 int snd_soc_get_dai_name(struct of_phandle_args *args,
3697 const char **dai_name)
3699 struct snd_soc_component *pos;
3700 struct device_node *component_of_node;
3701 int ret = -EPROBE_DEFER;
3703 mutex_lock(&client_mutex);
3704 for_each_component(pos) {
3705 component_of_node = soc_component_to_node(pos);
3707 if (component_of_node != args->np)
3710 if (pos->driver->of_xlate_dai_name) {
3711 ret = pos->driver->of_xlate_dai_name(pos,
3715 struct snd_soc_dai *dai;
3718 switch (args->args_count) {
3720 id = 0; /* same as dai_drv[0] */
3730 if (id < 0 || id >= pos->num_dai) {
3737 /* find target DAI */
3738 for_each_component_dais(pos, dai) {
3744 *dai_name = dai->driver->name;
3746 *dai_name = pos->name;
3751 mutex_unlock(&client_mutex);
3754 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3756 int snd_soc_of_get_dai_name(struct device_node *of_node,
3757 const char **dai_name)
3759 struct of_phandle_args args;
3762 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3763 "#sound-dai-cells", 0, &args);
3767 ret = snd_soc_get_dai_name(&args, dai_name);
3769 of_node_put(args.np);
3773 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3776 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3777 * @dai_link: DAI link
3779 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3781 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3783 struct snd_soc_dai_link_component *component;
3786 for_each_link_codecs(dai_link, index, component) {
3787 if (!component->of_node)
3789 of_node_put(component->of_node);
3790 component->of_node = NULL;
3793 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3796 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3798 * @of_node: Device node
3799 * @dai_link: DAI link
3801 * Builds an array of CODEC DAI components from the DAI link property
3803 * The array is set in the DAI link and the number of DAIs is set accordingly.
3804 * The device nodes in the array (of_node) must be dereferenced by calling
3805 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3807 * Returns 0 for success
3809 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3810 struct device_node *of_node,
3811 struct snd_soc_dai_link *dai_link)
3813 struct of_phandle_args args;
3814 struct snd_soc_dai_link_component *component;
3816 int index, num_codecs, ret;
3818 /* Count the number of CODECs */
3820 num_codecs = of_count_phandle_with_args(of_node, name,
3821 "#sound-dai-cells");
3822 if (num_codecs <= 0) {
3823 if (num_codecs == -ENOENT)
3824 dev_err(dev, "No 'sound-dai' property\n");
3826 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3829 component = devm_kcalloc(dev,
3830 num_codecs, sizeof(*component),
3834 dai_link->codecs = component;
3835 dai_link->num_codecs = num_codecs;
3837 /* Parse the list */
3838 for_each_link_codecs(dai_link, index, component) {
3839 ret = of_parse_phandle_with_args(of_node, name,
3844 component->of_node = args.np;
3845 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3851 snd_soc_of_put_dai_link_codecs(dai_link);
3852 dai_link->codecs = NULL;
3853 dai_link->num_codecs = 0;
3856 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3858 static int __init snd_soc_init(void)
3860 snd_soc_debugfs_init();
3861 snd_soc_util_init();
3863 return platform_driver_register(&soc_driver);
3865 module_init(snd_soc_init);
3867 static void __exit snd_soc_exit(void)
3869 snd_soc_util_exit();
3870 snd_soc_debugfs_exit();
3872 platform_driver_unregister(&soc_driver);
3874 module_exit(snd_soc_exit);
3876 /* Module information */
3877 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3878 MODULE_DESCRIPTION("ALSA SoC Core");
3879 MODULE_LICENSE("GPL");
3880 MODULE_ALIAS("platform:soc-audio");