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 (!component->debugfs_root) {
169 dev_warn(component->dev,
170 "ASoC: Failed to create component debugfs directory\n");
174 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
175 component->debugfs_root);
178 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
180 debugfs_remove_recursive(component->debugfs_root);
183 static int dai_list_show(struct seq_file *m, void *v)
185 struct snd_soc_component *component;
186 struct snd_soc_dai *dai;
188 mutex_lock(&client_mutex);
190 for_each_component(component)
191 for_each_component_dais(component, dai)
192 seq_printf(m, "%s\n", dai->name);
194 mutex_unlock(&client_mutex);
198 DEFINE_SHOW_ATTRIBUTE(dai_list);
200 static int component_list_show(struct seq_file *m, void *v)
202 struct snd_soc_component *component;
204 mutex_lock(&client_mutex);
206 for_each_component(component)
207 seq_printf(m, "%s\n", component->name);
209 mutex_unlock(&client_mutex);
213 DEFINE_SHOW_ATTRIBUTE(component_list);
215 static void soc_init_card_debugfs(struct snd_soc_card *card)
217 if (!snd_soc_debugfs_root)
220 card->debugfs_card_root = debugfs_create_dir(card->name,
221 snd_soc_debugfs_root);
222 if (!card->debugfs_card_root) {
224 "ASoC: Failed to create card debugfs directory\n");
228 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
229 card->debugfs_card_root,
231 if (!card->debugfs_pop_time)
233 "ASoC: Failed to create pop time debugfs file\n");
236 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
238 if (!card->debugfs_card_root)
240 debugfs_remove_recursive(card->debugfs_card_root);
241 card->debugfs_card_root = NULL;
244 static void snd_soc_debugfs_init(void)
246 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
247 if (IS_ERR_OR_NULL(snd_soc_debugfs_root)) {
248 pr_warn("ASoC: Failed to create debugfs directory\n");
249 snd_soc_debugfs_root = NULL;
253 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
255 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
257 if (!debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
258 &component_list_fops))
259 pr_warn("ASoC: Failed to create component list debugfs file\n");
262 static void snd_soc_debugfs_exit(void)
264 debugfs_remove_recursive(snd_soc_debugfs_root);
269 static inline void soc_init_component_debugfs(
270 struct snd_soc_component *component)
274 static inline void soc_cleanup_component_debugfs(
275 struct snd_soc_component *component)
279 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
283 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
287 static inline void snd_soc_debugfs_init(void)
291 static inline void snd_soc_debugfs_exit(void)
297 static int snd_soc_rtdcom_add(struct snd_soc_pcm_runtime *rtd,
298 struct snd_soc_component *component)
300 struct snd_soc_rtdcom_list *rtdcom;
301 struct snd_soc_rtdcom_list *new_rtdcom;
303 for_each_rtdcom(rtd, rtdcom) {
304 /* already connected */
305 if (rtdcom->component == component)
309 new_rtdcom = kmalloc(sizeof(*new_rtdcom), GFP_KERNEL);
313 new_rtdcom->component = component;
314 INIT_LIST_HEAD(&new_rtdcom->list);
316 list_add_tail(&new_rtdcom->list, &rtd->component_list);
321 static void snd_soc_rtdcom_del_all(struct snd_soc_pcm_runtime *rtd)
323 struct snd_soc_rtdcom_list *rtdcom1, *rtdcom2;
325 for_each_rtdcom_safe(rtd, rtdcom1, rtdcom2)
328 INIT_LIST_HEAD(&rtd->component_list);
331 struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
332 const char *driver_name)
334 struct snd_soc_rtdcom_list *rtdcom;
339 for_each_rtdcom(rtd, rtdcom) {
340 const char *component_name = rtdcom->component->driver->name;
345 if ((component_name == driver_name) ||
346 strcmp(component_name, driver_name) == 0)
347 return rtdcom->component;
352 EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
354 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
355 const char *dai_link, int stream)
357 struct snd_soc_pcm_runtime *rtd;
359 for_each_card_rtds(card, rtd) {
360 if (rtd->dai_link->no_pcm &&
361 !strcmp(rtd->dai_link->name, dai_link))
362 return rtd->pcm->streams[stream].substream;
364 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
367 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
369 static const struct snd_soc_ops null_snd_soc_ops;
371 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
372 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
374 struct snd_soc_pcm_runtime *rtd;
376 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
380 INIT_LIST_HEAD(&rtd->component_list);
382 rtd->dai_link = dai_link;
383 if (!rtd->dai_link->ops)
384 rtd->dai_link->ops = &null_snd_soc_ops;
386 rtd->codec_dais = kcalloc(dai_link->num_codecs,
387 sizeof(struct snd_soc_dai *),
389 if (!rtd->codec_dais) {
397 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
399 kfree(rtd->codec_dais);
400 snd_soc_rtdcom_del_all(rtd);
404 static void soc_add_pcm_runtime(struct snd_soc_card *card,
405 struct snd_soc_pcm_runtime *rtd)
407 list_add_tail(&rtd->list, &card->rtd_list);
408 rtd->num = card->num_rtd;
412 static void soc_remove_pcm_runtimes(struct snd_soc_card *card)
414 struct snd_soc_pcm_runtime *rtd, *_rtd;
416 for_each_card_rtds_safe(card, rtd, _rtd) {
417 list_del(&rtd->list);
418 soc_free_pcm_runtime(rtd);
424 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
425 const char *dai_link)
427 struct snd_soc_pcm_runtime *rtd;
429 for_each_card_rtds(card, rtd) {
430 if (!strcmp(rtd->dai_link->name, dai_link))
433 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
436 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
438 static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
440 struct snd_soc_pcm_runtime *rtd;
442 for_each_card_rtds(card, rtd)
443 flush_delayed_work(&rtd->delayed_work);
446 static void codec2codec_close_delayed_work(struct work_struct *work)
449 * Currently nothing to do for c2c links
450 * Since c2c links are internal nodes in the DAPM graph and
451 * don't interface with the outside world or application layer
452 * we don't have to do any special handling on close.
456 #ifdef CONFIG_PM_SLEEP
457 /* powers down audio subsystem for suspend */
458 int snd_soc_suspend(struct device *dev)
460 struct snd_soc_card *card = dev_get_drvdata(dev);
461 struct snd_soc_component *component;
462 struct snd_soc_pcm_runtime *rtd;
465 /* If the card is not initialized yet there is nothing to do */
466 if (!card->instantiated)
470 * Due to the resume being scheduled into a workqueue we could
471 * suspend before that's finished - wait for it to complete.
473 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
475 /* we're going to block userspace touching us until resume completes */
476 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
478 /* mute any active DACs */
479 for_each_card_rtds(card, rtd) {
480 struct snd_soc_dai *dai;
482 if (rtd->dai_link->ignore_suspend)
485 for_each_rtd_codec_dai(rtd, i, dai) {
486 struct snd_soc_dai_driver *drv = dai->driver;
488 if (drv->ops->digital_mute && dai->playback_active)
489 drv->ops->digital_mute(dai, 1);
493 /* suspend all pcms */
494 for_each_card_rtds(card, rtd) {
495 if (rtd->dai_link->ignore_suspend)
498 snd_pcm_suspend_all(rtd->pcm);
501 if (card->suspend_pre)
502 card->suspend_pre(card);
504 for_each_card_rtds(card, rtd) {
505 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
507 if (rtd->dai_link->ignore_suspend)
510 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
511 cpu_dai->driver->suspend(cpu_dai);
514 /* close any waiting streams */
515 snd_soc_flush_all_delayed_work(card);
517 for_each_card_rtds(card, rtd) {
519 if (rtd->dai_link->ignore_suspend)
522 snd_soc_dapm_stream_event(rtd,
523 SNDRV_PCM_STREAM_PLAYBACK,
524 SND_SOC_DAPM_STREAM_SUSPEND);
526 snd_soc_dapm_stream_event(rtd,
527 SNDRV_PCM_STREAM_CAPTURE,
528 SND_SOC_DAPM_STREAM_SUSPEND);
531 /* Recheck all endpoints too, their state is affected by suspend */
532 dapm_mark_endpoints_dirty(card);
533 snd_soc_dapm_sync(&card->dapm);
535 /* suspend all COMPONENTs */
536 for_each_card_components(card, component) {
537 struct snd_soc_dapm_context *dapm =
538 snd_soc_component_get_dapm(component);
541 * If there are paths active then the COMPONENT will be held
542 * with bias _ON and should not be suspended.
544 if (!component->suspended) {
545 switch (snd_soc_dapm_get_bias_level(dapm)) {
546 case SND_SOC_BIAS_STANDBY:
548 * If the COMPONENT is capable of idle
549 * bias off then being in STANDBY
550 * means it's doing something,
551 * otherwise fall through.
553 if (dapm->idle_bias_off) {
554 dev_dbg(component->dev,
555 "ASoC: idle_bias_off CODEC on over suspend\n");
560 case SND_SOC_BIAS_OFF:
561 if (component->driver->suspend)
562 component->driver->suspend(component);
563 component->suspended = 1;
564 if (component->regmap)
565 regcache_mark_dirty(component->regmap);
566 /* deactivate pins to sleep state */
567 pinctrl_pm_select_sleep_state(component->dev);
570 dev_dbg(component->dev,
571 "ASoC: COMPONENT is on over suspend\n");
577 for_each_card_rtds(card, rtd) {
578 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
580 if (rtd->dai_link->ignore_suspend)
583 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
584 cpu_dai->driver->suspend(cpu_dai);
586 /* deactivate pins to sleep state */
587 pinctrl_pm_select_sleep_state(cpu_dai->dev);
590 if (card->suspend_post)
591 card->suspend_post(card);
595 EXPORT_SYMBOL_GPL(snd_soc_suspend);
598 * deferred resume work, so resume can complete before we finished
599 * setting our codec back up, which can be very slow on I2C
601 static void soc_resume_deferred(struct work_struct *work)
603 struct snd_soc_card *card =
604 container_of(work, struct snd_soc_card,
605 deferred_resume_work);
606 struct snd_soc_pcm_runtime *rtd;
607 struct snd_soc_component *component;
611 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
612 * so userspace apps are blocked from touching us
615 dev_dbg(card->dev, "ASoC: starting resume work\n");
617 /* Bring us up into D2 so that DAPM starts enabling things */
618 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
620 if (card->resume_pre)
621 card->resume_pre(card);
623 /* resume control bus DAIs */
624 for_each_card_rtds(card, rtd) {
625 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
627 if (rtd->dai_link->ignore_suspend)
630 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
631 cpu_dai->driver->resume(cpu_dai);
634 for_each_card_components(card, component) {
635 if (component->suspended) {
636 if (component->driver->resume)
637 component->driver->resume(component);
638 component->suspended = 0;
642 for_each_card_rtds(card, rtd) {
644 if (rtd->dai_link->ignore_suspend)
647 snd_soc_dapm_stream_event(rtd,
648 SNDRV_PCM_STREAM_PLAYBACK,
649 SND_SOC_DAPM_STREAM_RESUME);
651 snd_soc_dapm_stream_event(rtd,
652 SNDRV_PCM_STREAM_CAPTURE,
653 SND_SOC_DAPM_STREAM_RESUME);
656 /* unmute any active DACs */
657 for_each_card_rtds(card, rtd) {
658 struct snd_soc_dai *dai;
660 if (rtd->dai_link->ignore_suspend)
663 for_each_rtd_codec_dai(rtd, i, dai) {
664 struct snd_soc_dai_driver *drv = dai->driver;
666 if (drv->ops->digital_mute && dai->playback_active)
667 drv->ops->digital_mute(dai, 0);
671 for_each_card_rtds(card, rtd) {
672 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
674 if (rtd->dai_link->ignore_suspend)
677 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
678 cpu_dai->driver->resume(cpu_dai);
681 if (card->resume_post)
682 card->resume_post(card);
684 dev_dbg(card->dev, "ASoC: resume work completed\n");
686 /* Recheck all endpoints too, their state is affected by suspend */
687 dapm_mark_endpoints_dirty(card);
688 snd_soc_dapm_sync(&card->dapm);
690 /* userspace can access us now we are back as we were before */
691 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
694 /* powers up audio subsystem after a suspend */
695 int snd_soc_resume(struct device *dev)
697 struct snd_soc_card *card = dev_get_drvdata(dev);
698 bool bus_control = false;
699 struct snd_soc_pcm_runtime *rtd;
700 struct snd_soc_dai *codec_dai;
703 /* If the card is not initialized yet there is nothing to do */
704 if (!card->instantiated)
707 /* activate pins from sleep state */
708 for_each_card_rtds(card, rtd) {
709 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
712 pinctrl_pm_select_default_state(cpu_dai->dev);
714 for_each_rtd_codec_dai(rtd, i, codec_dai) {
715 if (codec_dai->active)
716 pinctrl_pm_select_default_state(codec_dai->dev);
721 * DAIs that also act as the control bus master might have other drivers
722 * hanging off them so need to resume immediately. Other drivers don't
723 * have that problem and may take a substantial amount of time to resume
724 * due to I/O costs and anti-pop so handle them out of line.
726 for_each_card_rtds(card, rtd) {
727 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
729 bus_control |= cpu_dai->driver->bus_control;
732 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
733 soc_resume_deferred(&card->deferred_resume_work);
735 dev_dbg(dev, "ASoC: Scheduling resume work\n");
736 if (!schedule_work(&card->deferred_resume_work))
737 dev_err(dev, "ASoC: resume work item may be lost\n");
742 EXPORT_SYMBOL_GPL(snd_soc_resume);
744 #define snd_soc_suspend NULL
745 #define snd_soc_resume NULL
748 static const struct snd_soc_dai_ops null_dai_ops = {
751 static struct device_node
752 *soc_component_to_node(struct snd_soc_component *component)
754 struct device_node *of_node;
756 of_node = component->dev->of_node;
757 if (!of_node && component->dev->parent)
758 of_node = component->dev->parent->of_node;
763 static struct snd_soc_component *soc_find_component(
764 const struct device_node *of_node, const char *name)
766 struct snd_soc_component *component;
767 struct device_node *component_of_node;
769 lockdep_assert_held(&client_mutex);
771 for_each_component(component) {
773 component_of_node = soc_component_to_node(component);
775 if (component_of_node == of_node)
777 } else if (name && strcmp(component->name, name) == 0) {
785 static int snd_soc_is_matching_component(
786 const struct snd_soc_dai_link_component *dlc,
787 struct snd_soc_component *component)
789 struct device_node *component_of_node;
791 component_of_node = soc_component_to_node(component);
793 if (dlc->of_node && component_of_node != dlc->of_node)
795 if (dlc->name && strcmp(component->name, dlc->name))
802 * snd_soc_find_dai - Find a registered DAI
804 * @dlc: name of the DAI or the DAI driver and optional component info to match
806 * This function will search all registered components and their DAIs to
807 * find the DAI of the same name. The component's of_node and name
808 * should also match if being specified.
810 * Return: pointer of DAI, or NULL if not found.
812 struct snd_soc_dai *snd_soc_find_dai(
813 const struct snd_soc_dai_link_component *dlc)
815 struct snd_soc_component *component;
816 struct snd_soc_dai *dai;
818 lockdep_assert_held(&client_mutex);
820 /* Find CPU DAI from registered DAIs */
821 for_each_component(component) {
822 if (!snd_soc_is_matching_component(dlc, component))
824 for_each_component_dais(component, dai) {
825 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
826 && (!dai->driver->name
827 || strcmp(dai->driver->name, dlc->dai_name)))
836 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
839 * snd_soc_find_dai_link - Find a DAI link
842 * @id: DAI link ID to match
843 * @name: DAI link name to match, optional
844 * @stream_name: DAI link stream name to match, optional
846 * This function will search all existing DAI links of the soc card to
847 * find the link of the same ID. Since DAI links may not have their
848 * unique ID, so name and stream name should also match if being
851 * Return: pointer of DAI link, or NULL if not found.
853 struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
854 int id, const char *name,
855 const char *stream_name)
857 struct snd_soc_dai_link *link, *_link;
859 lockdep_assert_held(&client_mutex);
861 for_each_card_links_safe(card, link, _link) {
865 if (name && (!link->name || strcmp(name, link->name)))
868 if (stream_name && (!link->stream_name
869 || strcmp(stream_name, link->stream_name)))
877 EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);
879 static bool soc_is_dai_link_bound(struct snd_soc_card *card,
880 struct snd_soc_dai_link *dai_link)
882 struct snd_soc_pcm_runtime *rtd;
884 for_each_card_rtds(card, rtd) {
885 if (rtd->dai_link == dai_link)
892 static int soc_bind_dai_link(struct snd_soc_card *card,
893 struct snd_soc_dai_link *dai_link)
895 struct snd_soc_pcm_runtime *rtd;
896 struct snd_soc_dai_link_component *codecs;
897 struct snd_soc_component *component;
900 if (dai_link->ignore)
903 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
905 if (soc_is_dai_link_bound(card, dai_link)) {
906 dev_dbg(card->dev, "ASoC: dai link %s already bound\n",
911 rtd = soc_new_pcm_runtime(card, dai_link);
915 /* FIXME: we need multi CPU support in the future */
916 rtd->cpu_dai = snd_soc_find_dai(dai_link->cpus);
918 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
919 dai_link->cpus->dai_name);
922 snd_soc_rtdcom_add(rtd, rtd->cpu_dai->component);
924 /* Find CODEC from registered CODECs */
925 rtd->num_codecs = dai_link->num_codecs;
926 for_each_link_codecs(dai_link, i, codecs) {
927 rtd->codec_dais[i] = snd_soc_find_dai(codecs);
928 if (!rtd->codec_dais[i]) {
929 dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
933 snd_soc_rtdcom_add(rtd, rtd->codec_dais[i]->component);
936 /* Single codec links expect codec and codec_dai in runtime data */
937 rtd->codec_dai = rtd->codec_dais[0];
939 /* Find PLATFORM from registered PLATFORMs */
940 for_each_component(component) {
941 if (!snd_soc_is_matching_component(dai_link->platforms,
945 snd_soc_rtdcom_add(rtd, component);
948 soc_add_pcm_runtime(card, rtd);
952 soc_free_pcm_runtime(rtd);
953 return -EPROBE_DEFER;
956 static void soc_cleanup_component(struct snd_soc_component *component)
958 snd_soc_component_set_jack(component, NULL, NULL);
959 list_del(&component->card_list);
960 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
961 soc_cleanup_component_debugfs(component);
962 component->card = NULL;
963 if (!component->driver->module_get_upon_open)
964 module_put(component->dev->driver->owner);
967 static void soc_remove_component(struct snd_soc_component *component)
969 if (!component->card)
972 if (component->driver->remove)
973 component->driver->remove(component);
975 soc_cleanup_component(component);
978 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
982 if (!dai || !dai->probed || !dai->driver ||
983 dai->driver->remove_order != order)
986 if (dai->driver->remove) {
987 err = dai->driver->remove(dai);
990 "ASoC: failed to remove %s: %d\n",
996 static void soc_remove_link_dais(struct snd_soc_card *card,
997 struct snd_soc_pcm_runtime *rtd, int order)
1000 struct snd_soc_dai *codec_dai;
1002 /* unregister the rtd device */
1003 if (rtd->dev_registered) {
1004 device_unregister(rtd->dev);
1005 rtd->dev_registered = 0;
1008 /* remove the CODEC DAI */
1009 for_each_rtd_codec_dai(rtd, i, codec_dai)
1010 soc_remove_dai(codec_dai, order);
1012 soc_remove_dai(rtd->cpu_dai, order);
1015 static void soc_remove_link_components(struct snd_soc_card *card,
1016 struct snd_soc_pcm_runtime *rtd, int order)
1018 struct snd_soc_component *component;
1019 struct snd_soc_rtdcom_list *rtdcom;
1021 mutex_lock(&client_mutex);
1022 for_each_rtdcom(rtd, rtdcom) {
1023 component = rtdcom->component;
1025 if (component->driver->remove_order == order)
1026 soc_remove_component(component);
1028 mutex_unlock(&client_mutex);
1031 static void soc_remove_dai_links(struct snd_soc_card *card)
1034 struct snd_soc_pcm_runtime *rtd;
1035 struct snd_soc_dai_link *link, *_link;
1037 for_each_comp_order(order) {
1038 for_each_card_rtds(card, rtd)
1039 soc_remove_link_dais(card, rtd, order);
1042 for_each_comp_order(order) {
1043 for_each_card_rtds(card, rtd)
1044 soc_remove_link_components(card, rtd, order);
1047 for_each_card_links_safe(card, link, _link) {
1048 if (link->dobj.type == SND_SOC_DOBJ_DAI_LINK)
1049 dev_warn(card->dev, "Topology forgot to remove link %s?\n",
1052 list_del(&link->list);
1056 static struct snd_soc_dai_link_component dummy_link = COMP_DUMMY();
1058 static int soc_init_dai_link(struct snd_soc_card *card,
1059 struct snd_soc_dai_link *link)
1062 struct snd_soc_dai_link_component *codec;
1064 /* default Platform */
1065 if (!link->platforms || !link->num_platforms) {
1066 link->platforms = &dummy_link;
1067 link->num_platforms = 1;
1070 for_each_link_codecs(link, i, codec) {
1072 * Codec must be specified by 1 of name or OF node,
1073 * not both or neither.
1075 if (!!codec->name ==
1077 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
1081 /* Codec DAI name must be specified */
1082 if (!codec->dai_name) {
1083 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
1090 if (link->num_platforms > 1) {
1092 "ASoC: multi platform is not yet supported %s\n",
1098 * Platform may be specified by either name or OF node, but
1099 * can be left unspecified, and a dummy platform will be used.
1101 if (link->platforms->name && link->platforms->of_node) {
1103 "ASoC: Both platform name/of_node are set for %s\n",
1109 * Defer card registartion if platform dai component is not added to
1112 if ((link->platforms->of_node || link->platforms->name) &&
1113 !soc_find_component(link->platforms->of_node, link->platforms->name))
1114 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->of_node, link->cpus->name))
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 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1521 ret = soc_post_component_init(rtd, dai_link->name);
1525 #ifdef CONFIG_DEBUG_FS
1526 /* add DPCM sysfs entries */
1527 if (dai_link->dynamic)
1528 soc_dpcm_debugfs_add(rtd);
1534 * most drivers will register their PCMs using DAI link ordering but
1535 * topology based drivers can use the DAI link id field to set PCM
1536 * device number and then use rtd + a base offset of the BEs.
1538 for_each_rtdcom(rtd, rtdcom) {
1539 component = rtdcom->component;
1541 if (!component->driver->use_dai_pcm_id)
1544 if (rtd->dai_link->no_pcm)
1545 num += component->driver->be_pcm_base;
1547 num = rtd->dai_link->id;
1550 if (cpu_dai->driver->compress_new) {
1551 /* create compress_device" */
1552 ret = cpu_dai->driver->compress_new(rtd, num);
1554 dev_err(card->dev, "ASoC: can't create compress %s\n",
1555 dai_link->stream_name);
1558 } else if (!dai_link->params) {
1559 /* create the pcm */
1560 ret = soc_new_pcm(rtd, num);
1562 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1563 dai_link->stream_name, ret);
1566 ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd);
1569 ret = soc_link_dai_pcm_new(rtd->codec_dais,
1570 rtd->num_codecs, rtd);
1574 INIT_DELAYED_WORK(&rtd->delayed_work,
1575 codec2codec_close_delayed_work);
1581 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1583 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1584 struct snd_soc_component *component;
1586 struct device_node *codec_of_node;
1588 if (aux_dev->codec_of_node || aux_dev->codec_name) {
1589 /* codecs, usually analog devices */
1590 name = aux_dev->codec_name;
1591 codec_of_node = aux_dev->codec_of_node;
1592 component = soc_find_component(codec_of_node, name);
1595 name = of_node_full_name(codec_of_node);
1598 } else if (aux_dev->name) {
1599 /* generic components */
1600 name = aux_dev->name;
1601 component = soc_find_component(NULL, name);
1605 dev_err(card->dev, "ASoC: Invalid auxiliary device\n");
1609 component->init = aux_dev->init;
1610 list_add(&component->card_aux_list, &card->aux_comp_list);
1615 dev_err(card->dev, "ASoC: %s not registered\n", name);
1616 return -EPROBE_DEFER;
1619 static int soc_probe_aux_devices(struct snd_soc_card *card)
1621 struct snd_soc_component *comp;
1625 for_each_comp_order(order) {
1626 list_for_each_entry(comp, &card->aux_comp_list, card_aux_list) {
1627 if (comp->driver->probe_order == order) {
1628 ret = soc_probe_component(card, comp);
1631 "ASoC: failed to probe aux component %s %d\n",
1642 static void soc_remove_aux_devices(struct snd_soc_card *card)
1644 struct snd_soc_component *comp, *_comp;
1647 for_each_comp_order(order) {
1648 list_for_each_entry_safe(comp, _comp,
1649 &card->aux_comp_list, card_aux_list) {
1651 if (comp->driver->remove_order == order) {
1652 soc_remove_component(comp);
1653 /* remove it from the card's aux_comp_list */
1654 list_del(&comp->card_aux_list);
1661 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1662 * @rtd: The runtime for which the DAI link format should be changed
1663 * @dai_fmt: The new DAI link format
1665 * This function updates the DAI link format for all DAIs connected to the DAI
1666 * link for the specified runtime.
1668 * Note: For setups with a static format set the dai_fmt field in the
1669 * corresponding snd_dai_link struct instead of using this function.
1671 * Returns 0 on success, otherwise a negative error code.
1673 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1674 unsigned int dai_fmt)
1676 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1677 struct snd_soc_dai *codec_dai;
1681 for_each_rtd_codec_dai(rtd, i, codec_dai) {
1682 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1683 if (ret != 0 && ret != -ENOTSUPP) {
1684 dev_warn(codec_dai->dev,
1685 "ASoC: Failed to set DAI format: %d\n", ret);
1691 * Flip the polarity for the "CPU" end of a CODEC<->CODEC link
1692 * the component which has non_legacy_dai_naming is Codec
1694 if (cpu_dai->component->driver->non_legacy_dai_naming) {
1695 unsigned int inv_dai_fmt;
1697 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1698 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1699 case SND_SOC_DAIFMT_CBM_CFM:
1700 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1702 case SND_SOC_DAIFMT_CBM_CFS:
1703 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1705 case SND_SOC_DAIFMT_CBS_CFM:
1706 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1708 case SND_SOC_DAIFMT_CBS_CFS:
1709 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1713 dai_fmt = inv_dai_fmt;
1716 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1717 if (ret != 0 && ret != -ENOTSUPP) {
1718 dev_warn(cpu_dai->dev,
1719 "ASoC: Failed to set DAI format: %d\n", ret);
1725 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1729 * Trim special characters, and replace '-' with '_' since '-' is used to
1730 * separate different DMI fields in the card long name. Only number and
1731 * alphabet characters and a few separator characters are kept.
1733 static void cleanup_dmi_name(char *name)
1737 for (i = 0; name[i]; i++) {
1738 if (isalnum(name[i]) || (name[i] == '.')
1739 || (name[i] == '_'))
1740 name[j++] = name[i];
1741 else if (name[i] == '-')
1749 * Check if a DMI field is valid, i.e. not containing any string
1750 * in the black list.
1752 static int is_dmi_valid(const char *field)
1756 while (dmi_blacklist[i]) {
1757 if (strstr(field, dmi_blacklist[i]))
1766 * snd_soc_set_dmi_name() - Register DMI names to card
1767 * @card: The card to register DMI names
1768 * @flavour: The flavour "differentiator" for the card amongst its peers.
1770 * An Intel machine driver may be used by many different devices but are
1771 * difficult for userspace to differentiate, since machine drivers ususally
1772 * use their own name as the card short name and leave the card long name
1773 * blank. To differentiate such devices and fix bugs due to lack of
1774 * device-specific configurations, this function allows DMI info to be used
1775 * as the sound card long name, in the format of
1776 * "vendor-product-version-board"
1777 * (Character '-' is used to separate different DMI fields here).
1778 * This will help the user space to load the device-specific Use Case Manager
1779 * (UCM) configurations for the card.
1781 * Possible card long names may be:
1782 * DellInc.-XPS139343-01-0310JH
1783 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1784 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1786 * This function also supports flavoring the card longname to provide
1787 * the extra differentiation, like "vendor-product-version-board-flavor".
1789 * We only keep number and alphabet characters and a few separator characters
1790 * in the card long name since UCM in the user space uses the card long names
1791 * as card configuration directory names and AudoConf cannot support special
1792 * charactors like SPACE.
1794 * Returns 0 on success, otherwise a negative error code.
1796 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1798 const char *vendor, *product, *product_version, *board;
1799 size_t longname_buf_size = sizeof(card->snd_card->longname);
1802 if (card->long_name)
1803 return 0; /* long name already set by driver or from DMI */
1805 /* make up dmi long name as: vendor.product.version.board */
1806 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1807 if (!vendor || !is_dmi_valid(vendor)) {
1808 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1812 snprintf(card->dmi_longname, sizeof(card->snd_card->longname),
1814 cleanup_dmi_name(card->dmi_longname);
1816 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1817 if (product && is_dmi_valid(product)) {
1818 len = strlen(card->dmi_longname);
1819 snprintf(card->dmi_longname + len,
1820 longname_buf_size - len,
1823 len++; /* skip the separator "-" */
1824 if (len < longname_buf_size)
1825 cleanup_dmi_name(card->dmi_longname + len);
1828 * some vendors like Lenovo may only put a self-explanatory
1829 * name in the product version field
1831 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1832 if (product_version && is_dmi_valid(product_version)) {
1833 len = strlen(card->dmi_longname);
1834 snprintf(card->dmi_longname + len,
1835 longname_buf_size - len,
1836 "-%s", product_version);
1839 if (len < longname_buf_size)
1840 cleanup_dmi_name(card->dmi_longname + len);
1844 board = dmi_get_system_info(DMI_BOARD_NAME);
1845 if (board && is_dmi_valid(board)) {
1846 len = strlen(card->dmi_longname);
1847 snprintf(card->dmi_longname + len,
1848 longname_buf_size - len,
1852 if (len < longname_buf_size)
1853 cleanup_dmi_name(card->dmi_longname + len);
1854 } else if (!product) {
1855 /* fall back to using legacy name */
1856 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1860 /* Add flavour to dmi long name */
1862 len = strlen(card->dmi_longname);
1863 snprintf(card->dmi_longname + len,
1864 longname_buf_size - len,
1868 if (len < longname_buf_size)
1869 cleanup_dmi_name(card->dmi_longname + len);
1872 /* set the card long name */
1873 card->long_name = card->dmi_longname;
1877 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1878 #endif /* CONFIG_DMI */
1880 static void soc_check_tplg_fes(struct snd_soc_card *card)
1882 struct snd_soc_component *component;
1883 const struct snd_soc_component_driver *comp_drv;
1884 struct snd_soc_dai_link *dai_link;
1887 for_each_component(component) {
1889 /* does this component override FEs ? */
1890 if (!component->driver->ignore_machine)
1893 /* for this machine ? */
1894 if (!strcmp(component->driver->ignore_machine,
1895 card->dev->driver->name))
1897 if (strcmp(component->driver->ignore_machine,
1898 dev_name(card->dev)))
1901 /* machine matches, so override the rtd data */
1902 for_each_card_prelinks(card, i, dai_link) {
1904 /* ignore this FE */
1905 if (dai_link->dynamic) {
1906 dai_link->ignore = true;
1910 dev_info(card->dev, "info: override FE DAI link %s\n",
1911 card->dai_link[i].name);
1913 /* override platform component */
1914 if (!dai_link->platforms) {
1915 dev_err(card->dev, "init platform error");
1918 dai_link->platforms->name = component->name;
1920 /* convert non BE into BE */
1921 dai_link->no_pcm = 1;
1923 /* override any BE fixups */
1924 dai_link->be_hw_params_fixup =
1925 component->driver->be_hw_params_fixup;
1928 * most BE links don't set stream name, so set it to
1929 * dai link name if it's NULL to help bind widgets.
1931 if (!dai_link->stream_name)
1932 dai_link->stream_name = dai_link->name;
1935 /* Inform userspace we are using alternate topology */
1936 if (component->driver->topology_name_prefix) {
1938 /* topology shortname created? */
1939 if (!card->topology_shortname_created) {
1940 comp_drv = component->driver;
1942 snprintf(card->topology_shortname, 32, "%s-%s",
1943 comp_drv->topology_name_prefix,
1945 card->topology_shortname_created = true;
1948 /* use topology shortname */
1949 card->name = card->topology_shortname;
1954 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1956 /* free the ALSA card at first; this syncs with pending operations */
1957 if (card->snd_card) {
1958 snd_card_free(card->snd_card);
1959 card->snd_card = NULL;
1962 /* remove and free each DAI */
1963 soc_remove_dai_links(card);
1964 soc_remove_pcm_runtimes(card);
1966 /* remove auxiliary devices */
1967 soc_remove_aux_devices(card);
1969 snd_soc_dapm_free(&card->dapm);
1970 soc_cleanup_card_debugfs(card);
1972 /* remove the card */
1979 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1981 struct snd_soc_pcm_runtime *rtd;
1982 struct snd_soc_dai_link *dai_link;
1985 mutex_lock(&client_mutex);
1986 for_each_card_prelinks(card, i, dai_link) {
1987 ret = soc_init_dai_link(card, dai_link);
1989 soc_cleanup_card_resources(card);
1990 dev_err(card->dev, "ASoC: failed to init link %s: %d\n",
1991 dai_link->name, ret);
1992 mutex_unlock(&client_mutex);
1996 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1998 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1999 card->dapm.dev = card->dev;
2000 card->dapm.card = card;
2001 list_add(&card->dapm.list, &card->dapm_list);
2003 /* check whether any platform is ignore machine FE and using topology */
2004 soc_check_tplg_fes(card);
2007 for_each_card_prelinks(card, i, dai_link) {
2008 ret = soc_bind_dai_link(card, dai_link);
2013 /* bind aux_devs too */
2014 for (i = 0; i < card->num_aux_devs; i++) {
2015 ret = soc_bind_aux_dev(card, i);
2020 /* add predefined DAI links to the list */
2021 for_each_card_prelinks(card, i, dai_link)
2022 snd_soc_add_dai_link(card, dai_link);
2024 /* card bind complete so register a sound card */
2025 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2026 card->owner, 0, &card->snd_card);
2029 "ASoC: can't create sound card for card %s: %d\n",
2034 soc_init_card_debugfs(card);
2036 #ifdef CONFIG_DEBUG_FS
2037 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
2040 #ifdef CONFIG_PM_SLEEP
2041 /* deferred resume work */
2042 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
2045 if (card->dapm_widgets)
2046 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2047 card->num_dapm_widgets);
2049 if (card->of_dapm_widgets)
2050 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2051 card->num_of_dapm_widgets);
2053 /* initialise the sound card only once */
2055 ret = card->probe(card);
2060 /* probe all components used by DAI links on this card */
2061 for_each_comp_order(order) {
2062 for_each_card_rtds(card, rtd) {
2063 ret = soc_probe_link_components(card, rtd, order);
2066 "ASoC: failed to instantiate card %d\n",
2073 /* probe auxiliary components */
2074 ret = soc_probe_aux_devices(card);
2079 * Find new DAI links added during probing components and bind them.
2080 * Components with topology may bring new DAIs and DAI links.
2082 for_each_card_links(card, dai_link) {
2083 if (soc_is_dai_link_bound(card, dai_link))
2086 ret = soc_init_dai_link(card, dai_link);
2089 ret = soc_bind_dai_link(card, dai_link);
2094 /* probe all DAI links on this card */
2095 for_each_comp_order(order) {
2096 for_each_card_rtds(card, rtd) {
2097 ret = soc_probe_link_dais(card, rtd, order);
2100 "ASoC: failed to instantiate card %d\n",
2107 snd_soc_dapm_link_dai_widgets(card);
2108 snd_soc_dapm_connect_dai_link_widgets(card);
2111 snd_soc_add_card_controls(card, card->controls,
2112 card->num_controls);
2114 if (card->dapm_routes)
2115 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2116 card->num_dapm_routes);
2118 if (card->of_dapm_routes)
2119 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2120 card->num_of_dapm_routes);
2122 /* try to set some sane longname if DMI is available */
2123 snd_soc_set_dmi_name(card, NULL);
2125 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
2127 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
2128 "%s", card->long_name ? card->long_name : card->name);
2129 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
2130 "%s", card->driver_name ? card->driver_name : card->name);
2131 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
2132 switch (card->snd_card->driver[i]) {
2138 if (!isalnum(card->snd_card->driver[i]))
2139 card->snd_card->driver[i] = '_';
2144 if (card->late_probe) {
2145 ret = card->late_probe(card);
2147 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2153 snd_soc_dapm_new_widgets(card);
2155 ret = snd_card_register(card->snd_card);
2157 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2162 card->instantiated = 1;
2163 dapm_mark_endpoints_dirty(card);
2164 snd_soc_dapm_sync(&card->dapm);
2168 soc_cleanup_card_resources(card);
2170 mutex_unlock(&card->mutex);
2171 mutex_unlock(&client_mutex);
2176 /* probes a new socdev */
2177 static int soc_probe(struct platform_device *pdev)
2179 struct snd_soc_card *card = platform_get_drvdata(pdev);
2182 * no card, so machine driver should be registering card
2183 * we should not be here in that case so ret error
2188 dev_warn(&pdev->dev,
2189 "ASoC: machine %s should use snd_soc_register_card()\n",
2192 /* Bodge while we unpick instantiation */
2193 card->dev = &pdev->dev;
2195 return snd_soc_register_card(card);
2198 /* removes a socdev */
2199 static int soc_remove(struct platform_device *pdev)
2201 struct snd_soc_card *card = platform_get_drvdata(pdev);
2203 snd_soc_unregister_card(card);
2207 int snd_soc_poweroff(struct device *dev)
2209 struct snd_soc_card *card = dev_get_drvdata(dev);
2210 struct snd_soc_pcm_runtime *rtd;
2212 if (!card->instantiated)
2216 * Flush out pmdown_time work - we actually do want to run it
2217 * now, we're shutting down so no imminent restart.
2219 snd_soc_flush_all_delayed_work(card);
2221 snd_soc_dapm_shutdown(card);
2223 /* deactivate pins to sleep state */
2224 for_each_card_rtds(card, rtd) {
2225 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2226 struct snd_soc_dai *codec_dai;
2229 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2230 for_each_rtd_codec_dai(rtd, i, codec_dai) {
2231 pinctrl_pm_select_sleep_state(codec_dai->dev);
2237 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2239 const struct dev_pm_ops snd_soc_pm_ops = {
2240 .suspend = snd_soc_suspend,
2241 .resume = snd_soc_resume,
2242 .freeze = snd_soc_suspend,
2243 .thaw = snd_soc_resume,
2244 .poweroff = snd_soc_poweroff,
2245 .restore = snd_soc_resume,
2247 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2249 /* ASoC platform driver */
2250 static struct platform_driver soc_driver = {
2252 .name = "soc-audio",
2253 .pm = &snd_soc_pm_ops,
2256 .remove = soc_remove,
2260 * snd_soc_cnew - create new control
2261 * @_template: control template
2262 * @data: control private data
2263 * @long_name: control long name
2264 * @prefix: control name prefix
2266 * Create a new mixer control from a template control.
2268 * Returns 0 for success, else error.
2270 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2271 void *data, const char *long_name,
2274 struct snd_kcontrol_new template;
2275 struct snd_kcontrol *kcontrol;
2278 memcpy(&template, _template, sizeof(template));
2282 long_name = template.name;
2285 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2289 template.name = name;
2291 template.name = long_name;
2294 kcontrol = snd_ctl_new1(&template, data);
2300 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2302 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2303 const struct snd_kcontrol_new *controls, int num_controls,
2304 const char *prefix, void *data)
2308 for (i = 0; i < num_controls; i++) {
2309 const struct snd_kcontrol_new *control = &controls[i];
2311 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2312 control->name, prefix));
2314 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2315 control->name, err);
2323 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2326 struct snd_card *card = soc_card->snd_card;
2327 struct snd_kcontrol *kctl;
2329 if (unlikely(!name))
2332 list_for_each_entry(kctl, &card->controls, list)
2333 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2337 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2340 * snd_soc_add_component_controls - Add an array of controls to a component.
2342 * @component: Component to add controls to
2343 * @controls: Array of controls to add
2344 * @num_controls: Number of elements in the array
2346 * Return: 0 for success, else error.
2348 int snd_soc_add_component_controls(struct snd_soc_component *component,
2349 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2351 struct snd_card *card = component->card->snd_card;
2353 return snd_soc_add_controls(card, component->dev, controls,
2354 num_controls, component->name_prefix, component);
2356 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2359 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2360 * Convenience function to add a list of controls.
2362 * @soc_card: SoC card to add controls to
2363 * @controls: array of controls to add
2364 * @num_controls: number of elements in the array
2366 * Return 0 for success, else error.
2368 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2369 const struct snd_kcontrol_new *controls, int num_controls)
2371 struct snd_card *card = soc_card->snd_card;
2373 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2376 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2379 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2380 * Convienience function to add a list of controls.
2382 * @dai: DAI to add controls to
2383 * @controls: array of controls to add
2384 * @num_controls: number of elements in the array
2386 * Return 0 for success, else error.
2388 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2389 const struct snd_kcontrol_new *controls, int num_controls)
2391 struct snd_card *card = dai->component->card->snd_card;
2393 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2396 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2399 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2401 * @clk_id: DAI specific clock ID
2402 * @freq: new clock frequency in Hz
2403 * @dir: new clock direction - input/output.
2405 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2407 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2408 unsigned int freq, int dir)
2410 if (dai->driver->ops->set_sysclk)
2411 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2413 return snd_soc_component_set_sysclk(dai->component, clk_id, 0,
2416 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2419 * snd_soc_component_set_sysclk - configure COMPONENT system or master clock.
2420 * @component: COMPONENT
2421 * @clk_id: DAI specific clock ID
2422 * @source: Source for the clock
2423 * @freq: new clock frequency in Hz
2424 * @dir: new clock direction - input/output.
2426 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2428 int snd_soc_component_set_sysclk(struct snd_soc_component *component,
2429 int clk_id, int source, unsigned int freq,
2432 if (component->driver->set_sysclk)
2433 return component->driver->set_sysclk(component, clk_id, source,
2438 EXPORT_SYMBOL_GPL(snd_soc_component_set_sysclk);
2441 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2443 * @div_id: DAI specific clock divider ID
2444 * @div: new clock divisor.
2446 * Configures the clock dividers. This is used to derive the best DAI bit and
2447 * frame clocks from the system or master clock. It's best to set the DAI bit
2448 * and frame clocks as low as possible to save system power.
2450 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2451 int div_id, int div)
2453 if (dai->driver->ops->set_clkdiv)
2454 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2458 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2461 * snd_soc_dai_set_pll - configure DAI PLL.
2463 * @pll_id: DAI specific PLL ID
2464 * @source: DAI specific source for the PLL
2465 * @freq_in: PLL input clock frequency in Hz
2466 * @freq_out: requested PLL output clock frequency in Hz
2468 * Configures and enables PLL to generate output clock based on input clock.
2470 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2471 unsigned int freq_in, unsigned int freq_out)
2473 if (dai->driver->ops->set_pll)
2474 return dai->driver->ops->set_pll(dai, pll_id, source,
2477 return snd_soc_component_set_pll(dai->component, pll_id, source,
2480 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2483 * snd_soc_component_set_pll - configure component PLL.
2484 * @component: COMPONENT
2485 * @pll_id: DAI specific PLL ID
2486 * @source: DAI specific source for the PLL
2487 * @freq_in: PLL input clock frequency in Hz
2488 * @freq_out: requested PLL output clock frequency in Hz
2490 * Configures and enables PLL to generate output clock based on input clock.
2492 int snd_soc_component_set_pll(struct snd_soc_component *component, int pll_id,
2493 int source, unsigned int freq_in,
2494 unsigned int freq_out)
2496 if (component->driver->set_pll)
2497 return component->driver->set_pll(component, pll_id, source,
2502 EXPORT_SYMBOL_GPL(snd_soc_component_set_pll);
2505 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2507 * @ratio: Ratio of BCLK to Sample rate.
2509 * Configures the DAI for a preset BCLK to sample rate ratio.
2511 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2513 if (dai->driver->ops->set_bclk_ratio)
2514 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2518 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2521 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2523 * @fmt: SND_SOC_DAIFMT_* format value.
2525 * Configures the DAI hardware format and clocking.
2527 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2529 if (dai->driver->ops->set_fmt == NULL)
2531 return dai->driver->ops->set_fmt(dai, fmt);
2533 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2536 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2537 * @slots: Number of slots in use.
2538 * @tx_mask: bitmask representing active TX slots.
2539 * @rx_mask: bitmask representing active RX slots.
2541 * Generates the TDM tx and rx slot default masks for DAI.
2543 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2544 unsigned int *tx_mask,
2545 unsigned int *rx_mask)
2547 if (*tx_mask || *rx_mask)
2553 *tx_mask = (1 << slots) - 1;
2554 *rx_mask = (1 << slots) - 1;
2560 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2561 * @dai: The DAI to configure
2562 * @tx_mask: bitmask representing active TX slots.
2563 * @rx_mask: bitmask representing active RX slots.
2564 * @slots: Number of slots in use.
2565 * @slot_width: Width in bits for each slot.
2567 * This function configures the specified DAI for TDM operation. @slot contains
2568 * the total number of slots of the TDM stream and @slot_with the width of each
2569 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2570 * active slots of the TDM stream for the specified DAI, i.e. which slots the
2571 * DAI should write to or read from. If a bit is set the corresponding slot is
2572 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2573 * the first slot, bit 1 to the second slot and so on. The first active slot
2574 * maps to the first channel of the DAI, the second active slot to the second
2575 * channel and so on.
2577 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2578 * @rx_mask and @slot_width will be ignored.
2580 * Returns 0 on success, a negative error code otherwise.
2582 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2583 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2585 if (dai->driver->ops->xlate_tdm_slot_mask)
2586 dai->driver->ops->xlate_tdm_slot_mask(slots,
2587 &tx_mask, &rx_mask);
2589 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2591 dai->tx_mask = tx_mask;
2592 dai->rx_mask = rx_mask;
2594 if (dai->driver->ops->set_tdm_slot)
2595 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2600 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2603 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2605 * @tx_num: how many TX channels
2606 * @tx_slot: pointer to an array which imply the TX slot number channel
2608 * @rx_num: how many RX channels
2609 * @rx_slot: pointer to an array which imply the RX slot number channel
2612 * configure the relationship between channel number and TDM slot number.
2614 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2615 unsigned int tx_num, unsigned int *tx_slot,
2616 unsigned int rx_num, unsigned int *rx_slot)
2618 if (dai->driver->ops->set_channel_map)
2619 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2624 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2627 * snd_soc_dai_get_channel_map - Get DAI audio channel map
2629 * @tx_num: how many TX channels
2630 * @tx_slot: pointer to an array which imply the TX slot number channel
2632 * @rx_num: how many RX channels
2633 * @rx_slot: pointer to an array which imply the RX slot number channel
2636 int snd_soc_dai_get_channel_map(struct snd_soc_dai *dai,
2637 unsigned int *tx_num, unsigned int *tx_slot,
2638 unsigned int *rx_num, unsigned int *rx_slot)
2640 if (dai->driver->ops->get_channel_map)
2641 return dai->driver->ops->get_channel_map(dai, tx_num, tx_slot,
2646 EXPORT_SYMBOL_GPL(snd_soc_dai_get_channel_map);
2649 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2651 * @tristate: tristate enable
2653 * Tristates the DAI so that others can use it.
2655 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2657 if (dai->driver->ops->set_tristate)
2658 return dai->driver->ops->set_tristate(dai, tristate);
2662 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2665 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2667 * @mute: mute enable
2668 * @direction: stream to mute
2670 * Mutes the DAI DAC.
2672 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2675 if (dai->driver->ops->mute_stream)
2676 return dai->driver->ops->mute_stream(dai, mute, direction);
2677 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2678 dai->driver->ops->digital_mute)
2679 return dai->driver->ops->digital_mute(dai, mute);
2683 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2685 static int snd_soc_bind_card(struct snd_soc_card *card)
2687 struct snd_soc_pcm_runtime *rtd;
2690 ret = snd_soc_instantiate_card(card);
2694 /* deactivate pins to sleep state */
2695 for_each_card_rtds(card, rtd) {
2696 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2697 struct snd_soc_dai *codec_dai;
2700 for_each_rtd_codec_dai(rtd, j, codec_dai) {
2701 if (!codec_dai->active)
2702 pinctrl_pm_select_sleep_state(codec_dai->dev);
2705 if (!cpu_dai->active)
2706 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2713 * snd_soc_register_card - Register a card with the ASoC core
2715 * @card: Card to register
2718 int snd_soc_register_card(struct snd_soc_card *card)
2720 if (!card->name || !card->dev)
2723 dev_set_drvdata(card->dev, card);
2725 snd_soc_initialize_card_lists(card);
2727 INIT_LIST_HEAD(&card->dai_link_list);
2729 INIT_LIST_HEAD(&card->rtd_list);
2732 INIT_LIST_HEAD(&card->dapm_dirty);
2733 INIT_LIST_HEAD(&card->dobj_list);
2734 card->instantiated = 0;
2735 mutex_init(&card->mutex);
2736 mutex_init(&card->dapm_mutex);
2737 spin_lock_init(&card->dpcm_lock);
2739 return snd_soc_bind_card(card);
2741 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2743 static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
2745 struct snd_soc_pcm_runtime *rtd;
2748 if (card->instantiated) {
2749 card->instantiated = false;
2750 snd_soc_dapm_shutdown(card);
2751 snd_soc_flush_all_delayed_work(card);
2753 /* remove all components used by DAI links on this card */
2754 for_each_comp_order(order) {
2755 for_each_card_rtds(card, rtd) {
2756 soc_remove_link_components(card, rtd, order);
2760 soc_cleanup_card_resources(card);
2762 list_add(&card->list, &unbind_card_list);
2765 list_del(&card->list);
2770 * snd_soc_unregister_card - Unregister a card with the ASoC core
2772 * @card: Card to unregister
2775 int snd_soc_unregister_card(struct snd_soc_card *card)
2777 snd_soc_unbind_card(card, true);
2778 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2782 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2785 * Simplify DAI link configuration by removing ".-1" from device names
2786 * and sanitizing names.
2788 static char *fmt_single_name(struct device *dev, int *id)
2790 char *found, name[NAME_SIZE];
2793 if (dev_name(dev) == NULL)
2796 strlcpy(name, dev_name(dev), NAME_SIZE);
2798 /* are we a "%s.%d" name (platform and SPI components) */
2799 found = strstr(name, dev->driver->name);
2802 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2804 /* discard ID from name if ID == -1 */
2806 found[strlen(dev->driver->name)] = '\0';
2810 /* I2C component devices are named "bus-addr" */
2811 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2812 char tmp[NAME_SIZE];
2814 /* create unique ID number from I2C addr and bus */
2815 *id = ((id1 & 0xffff) << 16) + id2;
2817 /* sanitize component name for DAI link creation */
2818 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name,
2820 strlcpy(name, tmp, NAME_SIZE);
2825 return kstrdup(name, GFP_KERNEL);
2829 * Simplify DAI link naming for single devices with multiple DAIs by removing
2830 * any ".-1" and using the DAI name (instead of device name).
2832 static inline char *fmt_multiple_name(struct device *dev,
2833 struct snd_soc_dai_driver *dai_drv)
2835 if (dai_drv->name == NULL) {
2837 "ASoC: error - multiple DAI %s registered with no name\n",
2842 return kstrdup(dai_drv->name, GFP_KERNEL);
2846 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2848 * @component: The component for which the DAIs should be unregistered
2850 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2852 struct snd_soc_dai *dai, *_dai;
2854 for_each_component_dais_safe(component, dai, _dai) {
2855 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2857 list_del(&dai->list);
2863 /* Create a DAI and add it to the component's DAI list */
2864 static struct snd_soc_dai *soc_add_dai(struct snd_soc_component *component,
2865 struct snd_soc_dai_driver *dai_drv,
2866 bool legacy_dai_naming)
2868 struct device *dev = component->dev;
2869 struct snd_soc_dai *dai;
2871 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2873 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2878 * Back in the old days when we still had component-less DAIs,
2879 * instead of having a static name, component-less DAIs would
2880 * inherit the name of the parent device so it is possible to
2881 * register multiple instances of the DAI. We still need to keep
2882 * the same naming style even though those DAIs are not
2883 * component-less anymore.
2885 if (legacy_dai_naming &&
2886 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2887 dai->name = fmt_single_name(dev, &dai->id);
2889 dai->name = fmt_multiple_name(dev, dai_drv);
2891 dai->id = dai_drv->id;
2893 dai->id = component->num_dai;
2895 if (dai->name == NULL) {
2900 dai->component = component;
2902 dai->driver = dai_drv;
2903 if (!dai->driver->ops)
2904 dai->driver->ops = &null_dai_ops;
2906 /* see for_each_component_dais */
2907 list_add_tail(&dai->list, &component->dai_list);
2908 component->num_dai++;
2910 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2915 * snd_soc_register_dais - Register a DAI with the ASoC core
2917 * @component: The component the DAIs are registered for
2918 * @dai_drv: DAI driver to use for the DAIs
2919 * @count: Number of DAIs
2921 static int snd_soc_register_dais(struct snd_soc_component *component,
2922 struct snd_soc_dai_driver *dai_drv,
2925 struct device *dev = component->dev;
2926 struct snd_soc_dai *dai;
2930 dev_dbg(dev, "ASoC: dai register %s #%zu\n", dev_name(dev), count);
2932 for (i = 0; i < count; i++) {
2934 dai = soc_add_dai(component, dai_drv + i, count == 1 &&
2935 !component->driver->non_legacy_dai_naming);
2945 snd_soc_unregister_dais(component);
2951 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2953 * @component: The component the DAIs are registered for
2954 * @dai_drv: DAI driver to use for the DAI
2956 * Topology can use this API to register DAIs when probing a component.
2957 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2958 * will be freed in the component cleanup.
2960 int snd_soc_register_dai(struct snd_soc_component *component,
2961 struct snd_soc_dai_driver *dai_drv)
2963 struct snd_soc_dapm_context *dapm =
2964 snd_soc_component_get_dapm(component);
2965 struct snd_soc_dai *dai;
2968 if (dai_drv->dobj.type != SND_SOC_DOBJ_PCM) {
2969 dev_err(component->dev, "Invalid dai type %d\n",
2970 dai_drv->dobj.type);
2974 lockdep_assert_held(&client_mutex);
2975 dai = soc_add_dai(component, dai_drv, false);
2980 * Create the DAI widgets here. After adding DAIs, topology may
2981 * also add routes that need these widgets as source or sink.
2983 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
2985 dev_err(component->dev,
2986 "Failed to create DAI widgets %d\n", ret);
2991 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2993 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2994 enum snd_soc_dapm_type type, int subseq)
2996 struct snd_soc_component *component = dapm->component;
2998 component->driver->seq_notifier(component, type, subseq);
3001 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
3004 struct snd_soc_component *component = dapm->component;
3006 return component->driver->stream_event(component, event);
3009 static int snd_soc_component_set_bias_level(struct snd_soc_dapm_context *dapm,
3010 enum snd_soc_bias_level level)
3012 struct snd_soc_component *component = dapm->component;
3014 return component->driver->set_bias_level(component, level);
3017 static int snd_soc_component_initialize(struct snd_soc_component *component,
3018 const struct snd_soc_component_driver *driver, struct device *dev)
3020 struct snd_soc_dapm_context *dapm;
3022 component->name = fmt_single_name(dev, &component->id);
3023 if (!component->name) {
3024 dev_err(dev, "ASoC: Failed to allocate name\n");
3028 component->dev = dev;
3029 component->driver = driver;
3031 dapm = snd_soc_component_get_dapm(component);
3033 dapm->component = component;
3034 dapm->bias_level = SND_SOC_BIAS_OFF;
3035 dapm->idle_bias_off = !driver->idle_bias_on;
3036 dapm->suspend_bias_off = driver->suspend_bias_off;
3037 if (driver->seq_notifier)
3038 dapm->seq_notifier = snd_soc_component_seq_notifier;
3039 if (driver->stream_event)
3040 dapm->stream_event = snd_soc_component_stream_event;
3041 if (driver->set_bias_level)
3042 dapm->set_bias_level = snd_soc_component_set_bias_level;
3044 INIT_LIST_HEAD(&component->dai_list);
3045 mutex_init(&component->io_mutex);
3050 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
3052 int val_bytes = regmap_get_val_bytes(component->regmap);
3054 /* Errors are legitimate for non-integer byte multiples */
3056 component->val_bytes = val_bytes;
3059 #ifdef CONFIG_REGMAP
3062 * snd_soc_component_init_regmap() - Initialize regmap instance for the
3064 * @component: The component for which to initialize the regmap instance
3065 * @regmap: The regmap instance that should be used by the component
3067 * This function allows deferred assignment of the regmap instance that is
3068 * associated with the component. Only use this if the regmap instance is not
3069 * yet ready when the component is registered. The function must also be called
3070 * before the first IO attempt of the component.
3072 void snd_soc_component_init_regmap(struct snd_soc_component *component,
3073 struct regmap *regmap)
3075 component->regmap = regmap;
3076 snd_soc_component_setup_regmap(component);
3078 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
3081 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the
3083 * @component: The component for which to de-initialize the regmap instance
3085 * Calls regmap_exit() on the regmap instance associated to the component and
3086 * removes the regmap instance from the component.
3088 * This function should only be used if snd_soc_component_init_regmap() was used
3089 * to initialize the regmap instance.
3091 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
3093 regmap_exit(component->regmap);
3094 component->regmap = NULL;
3096 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
3100 static void snd_soc_component_add(struct snd_soc_component *component)
3102 mutex_lock(&client_mutex);
3104 if (!component->driver->write && !component->driver->read) {
3105 if (!component->regmap)
3106 component->regmap = dev_get_regmap(component->dev,
3108 if (component->regmap)
3109 snd_soc_component_setup_regmap(component);
3112 /* see for_each_component */
3113 list_add(&component->list, &component_list);
3114 INIT_LIST_HEAD(&component->dobj_list);
3116 mutex_unlock(&client_mutex);
3119 static void snd_soc_component_cleanup(struct snd_soc_component *component)
3121 snd_soc_unregister_dais(component);
3122 kfree(component->name);
3125 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
3127 struct snd_soc_card *card = component->card;
3130 snd_soc_unbind_card(card, false);
3132 list_del(&component->list);
3135 #define ENDIANNESS_MAP(name) \
3136 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
3137 static u64 endianness_format_map[] = {
3138 ENDIANNESS_MAP(S16_),
3139 ENDIANNESS_MAP(U16_),
3140 ENDIANNESS_MAP(S24_),
3141 ENDIANNESS_MAP(U24_),
3142 ENDIANNESS_MAP(S32_),
3143 ENDIANNESS_MAP(U32_),
3144 ENDIANNESS_MAP(S24_3),
3145 ENDIANNESS_MAP(U24_3),
3146 ENDIANNESS_MAP(S20_3),
3147 ENDIANNESS_MAP(U20_3),
3148 ENDIANNESS_MAP(S18_3),
3149 ENDIANNESS_MAP(U18_3),
3150 ENDIANNESS_MAP(FLOAT_),
3151 ENDIANNESS_MAP(FLOAT64_),
3152 ENDIANNESS_MAP(IEC958_SUBFRAME_),
3156 * Fix up the DAI formats for endianness: codecs don't actually see
3157 * the endianness of the data but we're using the CPU format
3158 * definitions which do need to include endianness so we ensure that
3159 * codec DAIs always have both big and little endian variants set.
3161 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
3165 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
3166 if (stream->formats & endianness_format_map[i])
3167 stream->formats |= endianness_format_map[i];
3170 static void snd_soc_try_rebind_card(void)
3172 struct snd_soc_card *card, *c;
3174 if (!list_empty(&unbind_card_list)) {
3175 list_for_each_entry_safe(card, c, &unbind_card_list, list) {
3176 if (!snd_soc_bind_card(card))
3177 list_del(&card->list);
3182 int snd_soc_add_component(struct device *dev,
3183 struct snd_soc_component *component,
3184 const struct snd_soc_component_driver *component_driver,
3185 struct snd_soc_dai_driver *dai_drv,
3191 ret = snd_soc_component_initialize(component, component_driver, dev);
3195 if (component_driver->endianness) {
3196 for (i = 0; i < num_dai; i++) {
3197 convert_endianness_formats(&dai_drv[i].playback);
3198 convert_endianness_formats(&dai_drv[i].capture);
3202 ret = snd_soc_register_dais(component, dai_drv, num_dai);
3204 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3208 snd_soc_component_add(component);
3209 snd_soc_try_rebind_card();
3214 snd_soc_component_cleanup(component);
3218 EXPORT_SYMBOL_GPL(snd_soc_add_component);
3220 int snd_soc_register_component(struct device *dev,
3221 const struct snd_soc_component_driver *component_driver,
3222 struct snd_soc_dai_driver *dai_drv,
3225 struct snd_soc_component *component;
3227 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
3231 return snd_soc_add_component(dev, component, component_driver,
3234 EXPORT_SYMBOL_GPL(snd_soc_register_component);
3237 * snd_soc_unregister_component - Unregister all related component
3238 * from the ASoC core
3240 * @dev: The device to unregister
3242 static int __snd_soc_unregister_component(struct device *dev)
3244 struct snd_soc_component *component;
3247 mutex_lock(&client_mutex);
3248 for_each_component(component) {
3249 if (dev != component->dev)
3252 snd_soc_tplg_component_remove(component,
3253 SND_SOC_TPLG_INDEX_ALL);
3254 snd_soc_component_del_unlocked(component);
3258 mutex_unlock(&client_mutex);
3261 snd_soc_component_cleanup(component);
3266 void snd_soc_unregister_component(struct device *dev)
3268 while (__snd_soc_unregister_component(dev))
3271 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
3273 struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
3274 const char *driver_name)
3276 struct snd_soc_component *component;
3277 struct snd_soc_component *ret;
3280 mutex_lock(&client_mutex);
3281 for_each_component(component) {
3282 if (dev != component->dev)
3286 (driver_name != component->driver->name) &&
3287 (strcmp(component->driver->name, driver_name) != 0))
3293 mutex_unlock(&client_mutex);
3297 EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
3299 /* Retrieve a card's name from device tree */
3300 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3301 const char *propname)
3303 struct device_node *np;
3307 pr_err("card->dev is not set before calling %s\n", __func__);
3311 np = card->dev->of_node;
3313 ret = of_property_read_string_index(np, propname, 0, &card->name);
3315 * EINVAL means the property does not exist. This is fine providing
3316 * card->name was previously set, which is checked later in
3317 * snd_soc_register_card.
3319 if (ret < 0 && ret != -EINVAL) {
3321 "ASoC: Property '%s' could not be read: %d\n",
3328 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3330 static const struct snd_soc_dapm_widget simple_widgets[] = {
3331 SND_SOC_DAPM_MIC("Microphone", NULL),
3332 SND_SOC_DAPM_LINE("Line", NULL),
3333 SND_SOC_DAPM_HP("Headphone", NULL),
3334 SND_SOC_DAPM_SPK("Speaker", NULL),
3337 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3338 const char *propname)
3340 struct device_node *np = card->dev->of_node;
3341 struct snd_soc_dapm_widget *widgets;
3342 const char *template, *wname;
3343 int i, j, num_widgets, ret;
3345 num_widgets = of_property_count_strings(np, propname);
3346 if (num_widgets < 0) {
3348 "ASoC: Property '%s' does not exist\n", propname);
3351 if (num_widgets & 1) {
3353 "ASoC: Property '%s' length is not even\n", propname);
3359 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3364 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3368 "ASoC: Could not allocate memory for widgets\n");
3372 for (i = 0; i < num_widgets; i++) {
3373 ret = of_property_read_string_index(np, propname,
3377 "ASoC: Property '%s' index %d read error:%d\n",
3378 propname, 2 * i, ret);
3382 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3383 if (!strncmp(template, simple_widgets[j].name,
3384 strlen(simple_widgets[j].name))) {
3385 widgets[i] = simple_widgets[j];
3390 if (j >= ARRAY_SIZE(simple_widgets)) {
3392 "ASoC: DAPM widget '%s' is not supported\n",
3397 ret = of_property_read_string_index(np, propname,
3402 "ASoC: Property '%s' index %d read error:%d\n",
3403 propname, (2 * i) + 1, ret);
3407 widgets[i].name = wname;
3410 card->of_dapm_widgets = widgets;
3411 card->num_of_dapm_widgets = num_widgets;
3415 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3417 int snd_soc_of_get_slot_mask(struct device_node *np,
3418 const char *prop_name,
3422 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3428 for (i = 0; i < val; i++)
3429 if (be32_to_cpup(&of_slot_mask[i]))
3434 EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
3436 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3437 unsigned int *tx_mask,
3438 unsigned int *rx_mask,
3439 unsigned int *slots,
3440 unsigned int *slot_width)
3446 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3448 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3450 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3451 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3459 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3460 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3470 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3472 void snd_soc_of_parse_node_prefix(struct device_node *np,
3473 struct snd_soc_codec_conf *codec_conf,
3474 struct device_node *of_node,
3475 const char *propname)
3480 ret = of_property_read_string(np, propname, &str);
3482 /* no prefix is not error */
3486 codec_conf->of_node = of_node;
3487 codec_conf->name_prefix = str;
3489 EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
3491 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3492 const char *propname)
3494 struct device_node *np = card->dev->of_node;
3496 struct snd_soc_dapm_route *routes;
3499 num_routes = of_property_count_strings(np, propname);
3500 if (num_routes < 0 || num_routes & 1) {
3502 "ASoC: Property '%s' does not exist or its length is not even\n",
3508 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3513 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3517 "ASoC: Could not allocate DAPM route table\n");
3521 for (i = 0; i < num_routes; i++) {
3522 ret = of_property_read_string_index(np, propname,
3523 2 * i, &routes[i].sink);
3526 "ASoC: Property '%s' index %d could not be read: %d\n",
3527 propname, 2 * i, ret);
3530 ret = of_property_read_string_index(np, propname,
3531 (2 * i) + 1, &routes[i].source);
3534 "ASoC: Property '%s' index %d could not be read: %d\n",
3535 propname, (2 * i) + 1, ret);
3540 card->num_of_dapm_routes = num_routes;
3541 card->of_dapm_routes = routes;
3545 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3547 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3549 struct device_node **bitclkmaster,
3550 struct device_node **framemaster)
3554 unsigned int format = 0;
3560 } of_fmt_table[] = {
3561 { "i2s", SND_SOC_DAIFMT_I2S },
3562 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3563 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3564 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3565 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3566 { "ac97", SND_SOC_DAIFMT_AC97 },
3567 { "pdm", SND_SOC_DAIFMT_PDM},
3568 { "msb", SND_SOC_DAIFMT_MSB },
3569 { "lsb", SND_SOC_DAIFMT_LSB },
3576 * check "dai-format = xxx"
3577 * or "[prefix]format = xxx"
3578 * SND_SOC_DAIFMT_FORMAT_MASK area
3580 ret = of_property_read_string(np, "dai-format", &str);
3582 snprintf(prop, sizeof(prop), "%sformat", prefix);
3583 ret = of_property_read_string(np, prop, &str);
3586 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3587 if (strcmp(str, of_fmt_table[i].name) == 0) {
3588 format |= of_fmt_table[i].val;
3595 * check "[prefix]continuous-clock"
3596 * SND_SOC_DAIFMT_CLOCK_MASK area
3598 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3599 if (of_property_read_bool(np, prop))
3600 format |= SND_SOC_DAIFMT_CONT;
3602 format |= SND_SOC_DAIFMT_GATED;
3605 * check "[prefix]bitclock-inversion"
3606 * check "[prefix]frame-inversion"
3607 * SND_SOC_DAIFMT_INV_MASK area
3609 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3610 bit = !!of_get_property(np, prop, NULL);
3612 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3613 frame = !!of_get_property(np, prop, NULL);
3615 switch ((bit << 4) + frame) {
3617 format |= SND_SOC_DAIFMT_IB_IF;
3620 format |= SND_SOC_DAIFMT_IB_NF;
3623 format |= SND_SOC_DAIFMT_NB_IF;
3626 /* SND_SOC_DAIFMT_NB_NF is default */
3631 * check "[prefix]bitclock-master"
3632 * check "[prefix]frame-master"
3633 * SND_SOC_DAIFMT_MASTER_MASK area
3635 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3636 bit = !!of_get_property(np, prop, NULL);
3637 if (bit && bitclkmaster)
3638 *bitclkmaster = of_parse_phandle(np, prop, 0);
3640 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3641 frame = !!of_get_property(np, prop, NULL);
3642 if (frame && framemaster)
3643 *framemaster = of_parse_phandle(np, prop, 0);
3645 switch ((bit << 4) + frame) {
3647 format |= SND_SOC_DAIFMT_CBM_CFM;
3650 format |= SND_SOC_DAIFMT_CBM_CFS;
3653 format |= SND_SOC_DAIFMT_CBS_CFM;
3656 format |= SND_SOC_DAIFMT_CBS_CFS;
3662 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3664 int snd_soc_get_dai_id(struct device_node *ep)
3666 struct snd_soc_component *component;
3667 struct device_node *node;
3670 node = of_graph_get_port_parent(ep);
3673 * For example HDMI case, HDMI has video/sound port,
3674 * but ALSA SoC needs sound port number only.
3675 * Thus counting HDMI DT port/endpoint doesn't work.
3676 * Then, it should have .of_xlate_dai_id
3679 mutex_lock(&client_mutex);
3680 component = soc_find_component(node, NULL);
3682 component->driver->of_xlate_dai_id)
3683 ret = component->driver->of_xlate_dai_id(component, ep);
3684 mutex_unlock(&client_mutex);
3690 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3692 int snd_soc_get_dai_name(struct of_phandle_args *args,
3693 const char **dai_name)
3695 struct snd_soc_component *pos;
3696 struct device_node *component_of_node;
3697 int ret = -EPROBE_DEFER;
3699 mutex_lock(&client_mutex);
3700 for_each_component(pos) {
3701 component_of_node = soc_component_to_node(pos);
3703 if (component_of_node != args->np)
3706 if (pos->driver->of_xlate_dai_name) {
3707 ret = pos->driver->of_xlate_dai_name(pos,
3711 struct snd_soc_dai *dai;
3714 switch (args->args_count) {
3716 id = 0; /* same as dai_drv[0] */
3726 if (id < 0 || id >= pos->num_dai) {
3733 /* find target DAI */
3734 for_each_component_dais(pos, dai) {
3740 *dai_name = dai->driver->name;
3742 *dai_name = pos->name;
3747 mutex_unlock(&client_mutex);
3750 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3752 int snd_soc_of_get_dai_name(struct device_node *of_node,
3753 const char **dai_name)
3755 struct of_phandle_args args;
3758 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3759 "#sound-dai-cells", 0, &args);
3763 ret = snd_soc_get_dai_name(&args, dai_name);
3765 of_node_put(args.np);
3769 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3772 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3773 * @dai_link: DAI link
3775 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3777 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3779 struct snd_soc_dai_link_component *component;
3782 for_each_link_codecs(dai_link, index, component) {
3783 if (!component->of_node)
3785 of_node_put(component->of_node);
3786 component->of_node = NULL;
3789 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3792 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3794 * @of_node: Device node
3795 * @dai_link: DAI link
3797 * Builds an array of CODEC DAI components from the DAI link property
3799 * The array is set in the DAI link and the number of DAIs is set accordingly.
3800 * The device nodes in the array (of_node) must be dereferenced by calling
3801 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3803 * Returns 0 for success
3805 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3806 struct device_node *of_node,
3807 struct snd_soc_dai_link *dai_link)
3809 struct of_phandle_args args;
3810 struct snd_soc_dai_link_component *component;
3812 int index, num_codecs, ret;
3814 /* Count the number of CODECs */
3816 num_codecs = of_count_phandle_with_args(of_node, name,
3817 "#sound-dai-cells");
3818 if (num_codecs <= 0) {
3819 if (num_codecs == -ENOENT)
3820 dev_err(dev, "No 'sound-dai' property\n");
3822 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3825 component = devm_kcalloc(dev,
3826 num_codecs, sizeof(*component),
3830 dai_link->codecs = component;
3831 dai_link->num_codecs = num_codecs;
3833 /* Parse the list */
3834 for_each_link_codecs(dai_link, index, component) {
3835 ret = of_parse_phandle_with_args(of_node, name,
3840 component->of_node = args.np;
3841 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3847 snd_soc_of_put_dai_link_codecs(dai_link);
3848 dai_link->codecs = NULL;
3849 dai_link->num_codecs = 0;
3852 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3854 static int __init snd_soc_init(void)
3856 snd_soc_debugfs_init();
3857 snd_soc_util_init();
3859 return platform_driver_register(&soc_driver);
3861 module_init(snd_soc_init);
3863 static void __exit snd_soc_exit(void)
3865 snd_soc_util_exit();
3866 snd_soc_debugfs_exit();
3868 platform_driver_unregister(&soc_driver);
3870 module_exit(snd_soc_exit);
3872 /* Module information */
3873 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3874 MODULE_DESCRIPTION("ALSA SoC Core");
3875 MODULE_LICENSE("GPL");
3876 MODULE_ALIAS("platform:soc-audio");