2 * soc-core.c -- ALSA SoC Audio Layer
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
10 * with code, comments and ideas from :-
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
19 * o Add hw rules to enforce rates, etc.
20 * o More testing with other codecs/machines.
21 * o Add more codecs and platforms to ensure good API coverage.
22 * o Support TDM on PCM and I2S
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/init.h>
28 #include <linux/delay.h>
30 #include <linux/bitops.h>
31 #include <linux/debugfs.h>
32 #include <linux/platform_device.h>
33 #include <linux/pinctrl/consumer.h>
34 #include <linux/ctype.h>
35 #include <linux/slab.h>
37 #include <linux/of_graph.h>
38 #include <linux/dmi.h>
39 #include <sound/core.h>
40 #include <sound/jack.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc.h>
44 #include <sound/soc-dpcm.h>
45 #include <sound/soc-topology.h>
46 #include <sound/initval.h>
48 #define CREATE_TRACE_POINTS
49 #include <trace/events/asoc.h>
53 #ifdef CONFIG_DEBUG_FS
54 struct dentry *snd_soc_debugfs_root;
55 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
58 static DEFINE_MUTEX(client_mutex);
59 static LIST_HEAD(platform_list);
60 static LIST_HEAD(codec_list);
61 static LIST_HEAD(component_list);
64 * This is a timeout to do a DAPM powerdown after a stream is closed().
65 * It can be used to eliminate pops between different playback streams, e.g.
66 * between two audio tracks.
68 static int pmdown_time = 5000;
69 module_param(pmdown_time, int, 0);
70 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
72 /* If a DMI filed contain strings in this blacklist (e.g.
73 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
74 * as invalid and dropped when setting the card long name from DMI info.
76 static const char * const dmi_blacklist[] = {
77 "To be filled by OEM",
83 NULL, /* terminator */
86 /* returns the minimum number of bytes needed to represent
87 * a particular given value */
88 static int min_bytes_needed(unsigned long val)
93 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
96 c = (sizeof val * 8) - c;
104 /* fill buf which is 'len' bytes with a formatted
105 * string of the form 'reg: value\n' */
106 static int format_register_str(struct snd_soc_codec *codec,
107 unsigned int reg, char *buf, size_t len)
109 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
110 int regsize = codec->driver->reg_word_size * 2;
113 /* +2 for ': ' and + 1 for '\n' */
114 if (wordsize + regsize + 2 + 1 != len)
117 sprintf(buf, "%.*x: ", wordsize, reg);
120 ret = snd_soc_read(codec, reg);
122 memset(buf, 'X', regsize);
124 sprintf(buf, "%.*x", regsize, ret);
126 /* no NUL-termination needed */
130 /* codec register dump */
131 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
132 size_t count, loff_t pos)
135 int wordsize, regsize;
140 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
141 regsize = codec->driver->reg_word_size * 2;
143 len = wordsize + regsize + 2 + 1;
145 if (!codec->driver->reg_cache_size)
148 if (codec->driver->reg_cache_step)
149 step = codec->driver->reg_cache_step;
151 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
152 /* only support larger than PAGE_SIZE bytes debugfs
153 * entries for the default case */
155 if (total + len >= count - 1)
157 format_register_str(codec, i, buf + total, len);
163 total = min(total, count - 1);
168 static ssize_t codec_reg_show(struct device *dev,
169 struct device_attribute *attr, char *buf)
171 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
173 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
176 static DEVICE_ATTR_RO(codec_reg);
178 static ssize_t pmdown_time_show(struct device *dev,
179 struct device_attribute *attr, char *buf)
181 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
183 return sprintf(buf, "%ld\n", rtd->pmdown_time);
186 static ssize_t pmdown_time_set(struct device *dev,
187 struct device_attribute *attr,
188 const char *buf, size_t count)
190 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
193 ret = kstrtol(buf, 10, &rtd->pmdown_time);
200 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
202 static struct attribute *soc_dev_attrs[] = {
203 &dev_attr_codec_reg.attr,
204 &dev_attr_pmdown_time.attr,
208 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
209 struct attribute *attr, int idx)
211 struct device *dev = kobj_to_dev(kobj);
212 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
214 if (attr == &dev_attr_pmdown_time.attr)
215 return attr->mode; /* always visible */
216 return rtd->num_codecs ? attr->mode : 0; /* enabled only with codec */
219 static const struct attribute_group soc_dapm_dev_group = {
220 .attrs = soc_dapm_dev_attrs,
221 .is_visible = soc_dev_attr_is_visible,
224 static const struct attribute_group soc_dev_group = {
225 .attrs = soc_dev_attrs,
226 .is_visible = soc_dev_attr_is_visible,
229 static const struct attribute_group *soc_dev_attr_groups[] = {
235 #ifdef CONFIG_DEBUG_FS
236 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
237 size_t count, loff_t *ppos)
240 struct snd_soc_codec *codec = file->private_data;
243 if (*ppos < 0 || !count)
246 buf = kmalloc(count, GFP_KERNEL);
250 ret = soc_codec_reg_show(codec, buf, count, *ppos);
252 if (copy_to_user(user_buf, buf, ret)) {
263 static ssize_t codec_reg_write_file(struct file *file,
264 const char __user *user_buf, size_t count, loff_t *ppos)
269 unsigned long reg, value;
270 struct snd_soc_codec *codec = file->private_data;
273 buf_size = min(count, (sizeof(buf)-1));
274 if (copy_from_user(buf, user_buf, buf_size))
278 while (*start == ' ')
280 reg = simple_strtoul(start, &start, 16);
281 while (*start == ' ')
283 ret = kstrtoul(start, 16, &value);
287 /* Userspace has been fiddling around behind the kernel's back */
288 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
290 snd_soc_write(codec, reg, value);
294 static const struct file_operations codec_reg_fops = {
296 .read = codec_reg_read_file,
297 .write = codec_reg_write_file,
298 .llseek = default_llseek,
301 static void soc_init_component_debugfs(struct snd_soc_component *component)
303 if (!component->card->debugfs_card_root)
306 if (component->debugfs_prefix) {
309 name = kasprintf(GFP_KERNEL, "%s:%s",
310 component->debugfs_prefix, component->name);
312 component->debugfs_root = debugfs_create_dir(name,
313 component->card->debugfs_card_root);
317 component->debugfs_root = debugfs_create_dir(component->name,
318 component->card->debugfs_card_root);
321 if (!component->debugfs_root) {
322 dev_warn(component->dev,
323 "ASoC: Failed to create component debugfs directory\n");
327 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
328 component->debugfs_root);
330 if (component->init_debugfs)
331 component->init_debugfs(component);
334 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
336 debugfs_remove_recursive(component->debugfs_root);
339 static void soc_init_codec_debugfs(struct snd_soc_component *component)
341 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
342 struct dentry *debugfs_reg;
344 debugfs_reg = debugfs_create_file("codec_reg", 0644,
345 codec->component.debugfs_root,
346 codec, &codec_reg_fops);
349 "ASoC: Failed to create codec register debugfs file\n");
352 static int codec_list_show(struct seq_file *m, void *v)
354 struct snd_soc_codec *codec;
356 mutex_lock(&client_mutex);
358 list_for_each_entry(codec, &codec_list, list)
359 seq_printf(m, "%s\n", codec->component.name);
361 mutex_unlock(&client_mutex);
365 DEFINE_SHOW_ATTRIBUTE(codec_list);
367 static int dai_list_show(struct seq_file *m, void *v)
369 struct snd_soc_component *component;
370 struct snd_soc_dai *dai;
372 mutex_lock(&client_mutex);
374 list_for_each_entry(component, &component_list, list)
375 list_for_each_entry(dai, &component->dai_list, list)
376 seq_printf(m, "%s\n", dai->name);
378 mutex_unlock(&client_mutex);
382 DEFINE_SHOW_ATTRIBUTE(dai_list);
384 static int platform_list_show(struct seq_file *m, void *v)
386 struct snd_soc_platform *platform;
388 mutex_lock(&client_mutex);
390 list_for_each_entry(platform, &platform_list, list)
391 seq_printf(m, "%s\n", platform->component.name);
393 mutex_unlock(&client_mutex);
397 DEFINE_SHOW_ATTRIBUTE(platform_list);
399 static void soc_init_card_debugfs(struct snd_soc_card *card)
401 if (!snd_soc_debugfs_root)
404 card->debugfs_card_root = debugfs_create_dir(card->name,
405 snd_soc_debugfs_root);
406 if (!card->debugfs_card_root) {
408 "ASoC: Failed to create card debugfs directory\n");
412 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
413 card->debugfs_card_root,
415 if (!card->debugfs_pop_time)
417 "ASoC: Failed to create pop time debugfs file\n");
420 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
422 debugfs_remove_recursive(card->debugfs_card_root);
425 static void snd_soc_debugfs_init(void)
427 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
428 if (IS_ERR_OR_NULL(snd_soc_debugfs_root)) {
429 pr_warn("ASoC: Failed to create debugfs directory\n");
430 snd_soc_debugfs_root = NULL;
434 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
436 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
438 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
440 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
442 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
443 &platform_list_fops))
444 pr_warn("ASoC: Failed to create platform list debugfs file\n");
447 static void snd_soc_debugfs_exit(void)
449 debugfs_remove_recursive(snd_soc_debugfs_root);
454 #define soc_init_codec_debugfs NULL
456 static inline void soc_init_component_debugfs(
457 struct snd_soc_component *component)
461 static inline void soc_cleanup_component_debugfs(
462 struct snd_soc_component *component)
466 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
470 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
474 static inline void snd_soc_debugfs_init(void)
478 static inline void snd_soc_debugfs_exit(void)
484 static int snd_soc_rtdcom_add(struct snd_soc_pcm_runtime *rtd,
485 struct snd_soc_component *component)
487 struct snd_soc_rtdcom_list *rtdcom;
488 struct snd_soc_rtdcom_list *new_rtdcom;
490 for_each_rtdcom(rtd, rtdcom) {
491 /* already connected */
492 if (rtdcom->component == component)
496 new_rtdcom = kmalloc(sizeof(*new_rtdcom), GFP_KERNEL);
500 new_rtdcom->component = component;
501 INIT_LIST_HEAD(&new_rtdcom->list);
503 list_add_tail(&new_rtdcom->list, &rtd->component_list);
508 static void snd_soc_rtdcom_del_all(struct snd_soc_pcm_runtime *rtd)
510 struct snd_soc_rtdcom_list *rtdcom1, *rtdcom2;
512 for_each_rtdcom_safe(rtd, rtdcom1, rtdcom2)
515 INIT_LIST_HEAD(&rtd->component_list);
518 struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
519 const char *driver_name)
521 struct snd_soc_rtdcom_list *rtdcom;
526 for_each_rtdcom(rtd, rtdcom) {
527 const char *component_name = rtdcom->component->driver->name;
532 if ((component_name == driver_name) ||
533 strcmp(component_name, driver_name) == 0)
534 return rtdcom->component;
539 EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
541 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
542 const char *dai_link, int stream)
544 struct snd_soc_pcm_runtime *rtd;
546 list_for_each_entry(rtd, &card->rtd_list, list) {
547 if (rtd->dai_link->no_pcm &&
548 !strcmp(rtd->dai_link->name, dai_link))
549 return rtd->pcm->streams[stream].substream;
551 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
554 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
556 static const struct snd_soc_ops null_snd_soc_ops;
558 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
559 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
561 struct snd_soc_pcm_runtime *rtd;
563 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
567 INIT_LIST_HEAD(&rtd->component_list);
569 rtd->dai_link = dai_link;
570 if (!rtd->dai_link->ops)
571 rtd->dai_link->ops = &null_snd_soc_ops;
573 rtd->codec_dais = kzalloc(sizeof(struct snd_soc_dai *) *
574 dai_link->num_codecs,
576 if (!rtd->codec_dais) {
584 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
586 kfree(rtd->codec_dais);
587 snd_soc_rtdcom_del_all(rtd);
591 static void soc_add_pcm_runtime(struct snd_soc_card *card,
592 struct snd_soc_pcm_runtime *rtd)
594 list_add_tail(&rtd->list, &card->rtd_list);
595 rtd->num = card->num_rtd;
599 static void soc_remove_pcm_runtimes(struct snd_soc_card *card)
601 struct snd_soc_pcm_runtime *rtd, *_rtd;
603 list_for_each_entry_safe(rtd, _rtd, &card->rtd_list, list) {
604 list_del(&rtd->list);
605 soc_free_pcm_runtime(rtd);
611 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
612 const char *dai_link)
614 struct snd_soc_pcm_runtime *rtd;
616 list_for_each_entry(rtd, &card->rtd_list, list) {
617 if (!strcmp(rtd->dai_link->name, dai_link))
620 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
623 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
625 static void codec2codec_close_delayed_work(struct work_struct *work)
627 /* Currently nothing to do for c2c links
628 * Since c2c links are internal nodes in the DAPM graph and
629 * don't interface with the outside world or application layer
630 * we don't have to do any special handling on close.
634 #ifdef CONFIG_PM_SLEEP
635 /* powers down audio subsystem for suspend */
636 int snd_soc_suspend(struct device *dev)
638 struct snd_soc_card *card = dev_get_drvdata(dev);
639 struct snd_soc_component *component;
640 struct snd_soc_pcm_runtime *rtd;
643 /* If the card is not initialized yet there is nothing to do */
644 if (!card->instantiated)
647 /* Due to the resume being scheduled into a workqueue we could
648 * suspend before that's finished - wait for it to complete.
650 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
652 /* we're going to block userspace touching us until resume completes */
653 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
655 /* mute any active DACs */
656 list_for_each_entry(rtd, &card->rtd_list, list) {
658 if (rtd->dai_link->ignore_suspend)
661 for (i = 0; i < rtd->num_codecs; i++) {
662 struct snd_soc_dai *dai = rtd->codec_dais[i];
663 struct snd_soc_dai_driver *drv = dai->driver;
665 if (drv->ops->digital_mute && dai->playback_active)
666 drv->ops->digital_mute(dai, 1);
670 /* suspend all pcms */
671 list_for_each_entry(rtd, &card->rtd_list, list) {
672 if (rtd->dai_link->ignore_suspend)
675 snd_pcm_suspend_all(rtd->pcm);
678 if (card->suspend_pre)
679 card->suspend_pre(card);
681 list_for_each_entry(rtd, &card->rtd_list, list) {
682 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
684 if (rtd->dai_link->ignore_suspend)
687 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
688 cpu_dai->driver->suspend(cpu_dai);
691 /* close any waiting streams */
692 list_for_each_entry(rtd, &card->rtd_list, list)
693 flush_delayed_work(&rtd->delayed_work);
695 list_for_each_entry(rtd, &card->rtd_list, list) {
697 if (rtd->dai_link->ignore_suspend)
700 snd_soc_dapm_stream_event(rtd,
701 SNDRV_PCM_STREAM_PLAYBACK,
702 SND_SOC_DAPM_STREAM_SUSPEND);
704 snd_soc_dapm_stream_event(rtd,
705 SNDRV_PCM_STREAM_CAPTURE,
706 SND_SOC_DAPM_STREAM_SUSPEND);
709 /* Recheck all endpoints too, their state is affected by suspend */
710 dapm_mark_endpoints_dirty(card);
711 snd_soc_dapm_sync(&card->dapm);
713 /* suspend all COMPONENTs */
714 list_for_each_entry(component, &card->component_dev_list, card_list) {
715 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
717 /* If there are paths active then the COMPONENT will be held with
718 * bias _ON and should not be suspended. */
719 if (!component->suspended) {
720 switch (snd_soc_dapm_get_bias_level(dapm)) {
721 case SND_SOC_BIAS_STANDBY:
723 * If the COMPONENT is capable of idle
724 * bias off then being in STANDBY
725 * means it's doing something,
726 * otherwise fall through.
728 if (dapm->idle_bias_off) {
729 dev_dbg(component->dev,
730 "ASoC: idle_bias_off CODEC on over suspend\n");
734 case SND_SOC_BIAS_OFF:
735 if (component->suspend)
736 component->suspend(component);
737 component->suspended = 1;
738 if (component->regmap)
739 regcache_mark_dirty(component->regmap);
740 /* deactivate pins to sleep state */
741 pinctrl_pm_select_sleep_state(component->dev);
744 dev_dbg(component->dev,
745 "ASoC: COMPONENT is on over suspend\n");
751 list_for_each_entry(rtd, &card->rtd_list, list) {
752 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
754 if (rtd->dai_link->ignore_suspend)
757 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
758 cpu_dai->driver->suspend(cpu_dai);
760 /* deactivate pins to sleep state */
761 pinctrl_pm_select_sleep_state(cpu_dai->dev);
764 if (card->suspend_post)
765 card->suspend_post(card);
769 EXPORT_SYMBOL_GPL(snd_soc_suspend);
771 /* deferred resume work, so resume can complete before we finished
772 * setting our codec back up, which can be very slow on I2C
774 static void soc_resume_deferred(struct work_struct *work)
776 struct snd_soc_card *card =
777 container_of(work, struct snd_soc_card, deferred_resume_work);
778 struct snd_soc_pcm_runtime *rtd;
779 struct snd_soc_component *component;
782 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
783 * so userspace apps are blocked from touching us
786 dev_dbg(card->dev, "ASoC: starting resume work\n");
788 /* Bring us up into D2 so that DAPM starts enabling things */
789 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
791 if (card->resume_pre)
792 card->resume_pre(card);
794 /* resume control bus DAIs */
795 list_for_each_entry(rtd, &card->rtd_list, list) {
796 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
798 if (rtd->dai_link->ignore_suspend)
801 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
802 cpu_dai->driver->resume(cpu_dai);
805 list_for_each_entry(component, &card->component_dev_list, card_list) {
806 if (component->suspended) {
807 if (component->resume)
808 component->resume(component);
809 component->suspended = 0;
813 list_for_each_entry(rtd, &card->rtd_list, list) {
815 if (rtd->dai_link->ignore_suspend)
818 snd_soc_dapm_stream_event(rtd,
819 SNDRV_PCM_STREAM_PLAYBACK,
820 SND_SOC_DAPM_STREAM_RESUME);
822 snd_soc_dapm_stream_event(rtd,
823 SNDRV_PCM_STREAM_CAPTURE,
824 SND_SOC_DAPM_STREAM_RESUME);
827 /* unmute any active DACs */
828 list_for_each_entry(rtd, &card->rtd_list, list) {
830 if (rtd->dai_link->ignore_suspend)
833 for (i = 0; i < rtd->num_codecs; i++) {
834 struct snd_soc_dai *dai = rtd->codec_dais[i];
835 struct snd_soc_dai_driver *drv = dai->driver;
837 if (drv->ops->digital_mute && dai->playback_active)
838 drv->ops->digital_mute(dai, 0);
842 list_for_each_entry(rtd, &card->rtd_list, list) {
843 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
845 if (rtd->dai_link->ignore_suspend)
848 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
849 cpu_dai->driver->resume(cpu_dai);
852 if (card->resume_post)
853 card->resume_post(card);
855 dev_dbg(card->dev, "ASoC: resume work completed\n");
857 /* Recheck all endpoints too, their state is affected by suspend */
858 dapm_mark_endpoints_dirty(card);
859 snd_soc_dapm_sync(&card->dapm);
861 /* userspace can access us now we are back as we were before */
862 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
865 /* powers up audio subsystem after a suspend */
866 int snd_soc_resume(struct device *dev)
868 struct snd_soc_card *card = dev_get_drvdata(dev);
869 bool bus_control = false;
870 struct snd_soc_pcm_runtime *rtd;
872 /* If the card is not initialized yet there is nothing to do */
873 if (!card->instantiated)
876 /* activate pins from sleep state */
877 list_for_each_entry(rtd, &card->rtd_list, list) {
878 struct snd_soc_dai **codec_dais = rtd->codec_dais;
879 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
883 pinctrl_pm_select_default_state(cpu_dai->dev);
885 for (j = 0; j < rtd->num_codecs; j++) {
886 struct snd_soc_dai *codec_dai = codec_dais[j];
887 if (codec_dai->active)
888 pinctrl_pm_select_default_state(codec_dai->dev);
893 * DAIs that also act as the control bus master might have other drivers
894 * hanging off them so need to resume immediately. Other drivers don't
895 * have that problem and may take a substantial amount of time to resume
896 * due to I/O costs and anti-pop so handle them out of line.
898 list_for_each_entry(rtd, &card->rtd_list, list) {
899 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
900 bus_control |= cpu_dai->driver->bus_control;
903 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
904 soc_resume_deferred(&card->deferred_resume_work);
906 dev_dbg(dev, "ASoC: Scheduling resume work\n");
907 if (!schedule_work(&card->deferred_resume_work))
908 dev_err(dev, "ASoC: resume work item may be lost\n");
913 EXPORT_SYMBOL_GPL(snd_soc_resume);
915 #define snd_soc_suspend NULL
916 #define snd_soc_resume NULL
919 static const struct snd_soc_dai_ops null_dai_ops = {
922 static struct snd_soc_component *soc_find_component(
923 const struct device_node *of_node, const char *name)
925 struct snd_soc_component *component;
927 lockdep_assert_held(&client_mutex);
929 list_for_each_entry(component, &component_list, list) {
931 if (component->dev->of_node == of_node)
933 } else if (strcmp(component->name, name) == 0) {
942 * snd_soc_find_dai - Find a registered DAI
944 * @dlc: name of the DAI or the DAI driver and optional component info to match
946 * This function will search all registered components and their DAIs to
947 * find the DAI of the same name. The component's of_node and name
948 * should also match if being specified.
950 * Return: pointer of DAI, or NULL if not found.
952 struct snd_soc_dai *snd_soc_find_dai(
953 const struct snd_soc_dai_link_component *dlc)
955 struct snd_soc_component *component;
956 struct snd_soc_dai *dai;
957 struct device_node *component_of_node;
959 lockdep_assert_held(&client_mutex);
961 /* Find CPU DAI from registered DAIs*/
962 list_for_each_entry(component, &component_list, list) {
963 component_of_node = component->dev->of_node;
964 if (!component_of_node && component->dev->parent)
965 component_of_node = component->dev->parent->of_node;
967 if (dlc->of_node && component_of_node != dlc->of_node)
969 if (dlc->name && strcmp(component->name, dlc->name))
971 list_for_each_entry(dai, &component->dai_list, list) {
972 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
973 && (!dai->driver->name
974 || strcmp(dai->driver->name, dlc->dai_name)))
983 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
987 * snd_soc_find_dai_link - Find a DAI link
990 * @id: DAI link ID to match
991 * @name: DAI link name to match, optional
992 * @stream_name: DAI link stream name to match, optional
994 * This function will search all existing DAI links of the soc card to
995 * find the link of the same ID. Since DAI links may not have their
996 * unique ID, so name and stream name should also match if being
999 * Return: pointer of DAI link, or NULL if not found.
1001 struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
1002 int id, const char *name,
1003 const char *stream_name)
1005 struct snd_soc_dai_link *link, *_link;
1007 lockdep_assert_held(&client_mutex);
1009 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1013 if (name && (!link->name || strcmp(name, link->name)))
1016 if (stream_name && (!link->stream_name
1017 || strcmp(stream_name, link->stream_name)))
1025 EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);
1027 static bool soc_is_dai_link_bound(struct snd_soc_card *card,
1028 struct snd_soc_dai_link *dai_link)
1030 struct snd_soc_pcm_runtime *rtd;
1032 list_for_each_entry(rtd, &card->rtd_list, list) {
1033 if (rtd->dai_link == dai_link)
1040 static int soc_bind_dai_link(struct snd_soc_card *card,
1041 struct snd_soc_dai_link *dai_link)
1043 struct snd_soc_pcm_runtime *rtd;
1044 struct snd_soc_dai_link_component *codecs = dai_link->codecs;
1045 struct snd_soc_dai_link_component cpu_dai_component;
1046 struct snd_soc_component *component;
1047 struct snd_soc_dai **codec_dais;
1048 struct snd_soc_platform *platform;
1049 struct device_node *platform_of_node;
1050 const char *platform_name;
1053 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1055 if (soc_is_dai_link_bound(card, dai_link)) {
1056 dev_dbg(card->dev, "ASoC: dai link %s already bound\n",
1061 rtd = soc_new_pcm_runtime(card, dai_link);
1065 cpu_dai_component.name = dai_link->cpu_name;
1066 cpu_dai_component.of_node = dai_link->cpu_of_node;
1067 cpu_dai_component.dai_name = dai_link->cpu_dai_name;
1068 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
1069 if (!rtd->cpu_dai) {
1070 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1071 dai_link->cpu_dai_name);
1074 snd_soc_rtdcom_add(rtd, rtd->cpu_dai->component);
1076 rtd->num_codecs = dai_link->num_codecs;
1078 /* Find CODEC from registered CODECs */
1079 codec_dais = rtd->codec_dais;
1080 for (i = 0; i < rtd->num_codecs; i++) {
1081 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
1082 if (!codec_dais[i]) {
1083 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
1084 codecs[i].dai_name);
1087 snd_soc_rtdcom_add(rtd, codec_dais[i]->component);
1090 /* Single codec links expect codec and codec_dai in runtime data */
1091 rtd->codec_dai = codec_dais[0];
1092 rtd->codec = rtd->codec_dai->codec;
1094 /* if there's no platform we match on the empty platform */
1095 platform_name = dai_link->platform_name;
1096 if (!platform_name && !dai_link->platform_of_node)
1097 platform_name = "snd-soc-dummy";
1099 /* find one from the set of registered platforms */
1100 list_for_each_entry(component, &component_list, list) {
1101 platform_of_node = component->dev->of_node;
1102 if (!platform_of_node && component->dev->parent->of_node)
1103 platform_of_node = component->dev->parent->of_node;
1105 if (dai_link->platform_of_node) {
1106 if (platform_of_node != dai_link->platform_of_node)
1109 if (strcmp(component->name, platform_name))
1113 snd_soc_rtdcom_add(rtd, component);
1116 /* find one from the set of registered platforms */
1117 list_for_each_entry(platform, &platform_list, list) {
1118 platform_of_node = platform->dev->of_node;
1119 if (!platform_of_node && platform->dev->parent->of_node)
1120 platform_of_node = platform->dev->parent->of_node;
1122 if (dai_link->platform_of_node) {
1123 if (platform_of_node != dai_link->platform_of_node)
1126 if (strcmp(platform->component.name, platform_name))
1130 rtd->platform = platform;
1133 soc_add_pcm_runtime(card, rtd);
1137 soc_free_pcm_runtime(rtd);
1138 return -EPROBE_DEFER;
1141 static void soc_remove_component(struct snd_soc_component *component)
1143 if (!component->card)
1146 list_del(&component->card_list);
1148 if (component->remove)
1149 component->remove(component);
1151 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1153 soc_cleanup_component_debugfs(component);
1154 component->card = NULL;
1155 module_put(component->dev->driver->owner);
1158 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1162 if (dai && dai->probed &&
1163 dai->driver->remove_order == order) {
1164 if (dai->driver->remove) {
1165 err = dai->driver->remove(dai);
1168 "ASoC: failed to remove %s: %d\n",
1175 static void soc_remove_link_dais(struct snd_soc_card *card,
1176 struct snd_soc_pcm_runtime *rtd, int order)
1180 /* unregister the rtd device */
1181 if (rtd->dev_registered) {
1182 device_unregister(rtd->dev);
1183 rtd->dev_registered = 0;
1186 /* remove the CODEC DAI */
1187 for (i = 0; i < rtd->num_codecs; i++)
1188 soc_remove_dai(rtd->codec_dais[i], order);
1190 soc_remove_dai(rtd->cpu_dai, order);
1193 static void soc_remove_link_components(struct snd_soc_card *card,
1194 struct snd_soc_pcm_runtime *rtd, int order)
1196 struct snd_soc_component *component;
1197 struct snd_soc_rtdcom_list *rtdcom;
1199 for_each_rtdcom(rtd, rtdcom) {
1200 component = rtdcom->component;
1202 if (component->driver->remove_order == order)
1203 soc_remove_component(component);
1207 static void soc_remove_dai_links(struct snd_soc_card *card)
1210 struct snd_soc_pcm_runtime *rtd;
1211 struct snd_soc_dai_link *link, *_link;
1213 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1215 list_for_each_entry(rtd, &card->rtd_list, list)
1216 soc_remove_link_dais(card, rtd, order);
1219 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1221 list_for_each_entry(rtd, &card->rtd_list, list)
1222 soc_remove_link_components(card, rtd, order);
1225 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1226 if (link->dobj.type == SND_SOC_DOBJ_DAI_LINK)
1227 dev_warn(card->dev, "Topology forgot to remove link %s?\n",
1230 list_del(&link->list);
1231 card->num_dai_links--;
1235 static int snd_soc_init_multicodec(struct snd_soc_card *card,
1236 struct snd_soc_dai_link *dai_link)
1238 /* Legacy codec/codec_dai link is a single entry in multicodec */
1239 if (dai_link->codec_name || dai_link->codec_of_node ||
1240 dai_link->codec_dai_name) {
1241 dai_link->num_codecs = 1;
1243 dai_link->codecs = devm_kzalloc(card->dev,
1244 sizeof(struct snd_soc_dai_link_component),
1246 if (!dai_link->codecs)
1249 dai_link->codecs[0].name = dai_link->codec_name;
1250 dai_link->codecs[0].of_node = dai_link->codec_of_node;
1251 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
1254 if (!dai_link->codecs) {
1255 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
1262 static int soc_init_dai_link(struct snd_soc_card *card,
1263 struct snd_soc_dai_link *link)
1267 ret = snd_soc_init_multicodec(card, link);
1269 dev_err(card->dev, "ASoC: failed to init multicodec\n");
1273 for (i = 0; i < link->num_codecs; i++) {
1275 * Codec must be specified by 1 of name or OF node,
1276 * not both or neither.
1278 if (!!link->codecs[i].name ==
1279 !!link->codecs[i].of_node) {
1280 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
1284 /* Codec DAI name must be specified */
1285 if (!link->codecs[i].dai_name) {
1286 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
1293 * Platform may be specified by either name or OF node, but
1294 * can be left unspecified, and a dummy platform will be used.
1296 if (link->platform_name && link->platform_of_node) {
1298 "ASoC: Both platform name/of_node are set for %s\n",
1304 * CPU device may be specified by either name or OF node, but
1305 * can be left unspecified, and will be matched based on DAI
1308 if (link->cpu_name && link->cpu_of_node) {
1310 "ASoC: Neither/both cpu name/of_node are set for %s\n",
1315 * At least one of CPU DAI name or CPU device name/node must be
1318 if (!link->cpu_dai_name &&
1319 !(link->cpu_name || link->cpu_of_node)) {
1321 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
1329 void snd_soc_disconnect_sync(struct device *dev)
1331 struct snd_soc_component *component = snd_soc_lookup_component(dev, NULL);
1333 if (!component || !component->card)
1336 snd_card_disconnect_sync(component->card->snd_card);
1338 EXPORT_SYMBOL_GPL(snd_soc_disconnect_sync);
1341 * snd_soc_add_dai_link - Add a DAI link dynamically
1342 * @card: The ASoC card to which the DAI link is added
1343 * @dai_link: The new DAI link to add
1345 * This function adds a DAI link to the ASoC card's link list.
1347 * Note: Topology can use this API to add DAI links when probing the
1348 * topology component. And machine drivers can still define static
1349 * DAI links in dai_link array.
1351 int snd_soc_add_dai_link(struct snd_soc_card *card,
1352 struct snd_soc_dai_link *dai_link)
1354 if (dai_link->dobj.type
1355 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1356 dev_err(card->dev, "Invalid dai link type %d\n",
1357 dai_link->dobj.type);
1361 lockdep_assert_held(&client_mutex);
1362 /* Notify the machine driver for extra initialization
1363 * on the link created by topology.
1365 if (dai_link->dobj.type && card->add_dai_link)
1366 card->add_dai_link(card, dai_link);
1368 list_add_tail(&dai_link->list, &card->dai_link_list);
1369 card->num_dai_links++;
1373 EXPORT_SYMBOL_GPL(snd_soc_add_dai_link);
1376 * snd_soc_remove_dai_link - Remove a DAI link from the list
1377 * @card: The ASoC card that owns the link
1378 * @dai_link: The DAI link to remove
1380 * This function removes a DAI link from the ASoC card's link list.
1382 * For DAI links previously added by topology, topology should
1383 * remove them by using the dobj embedded in the link.
1385 void snd_soc_remove_dai_link(struct snd_soc_card *card,
1386 struct snd_soc_dai_link *dai_link)
1388 struct snd_soc_dai_link *link, *_link;
1390 if (dai_link->dobj.type
1391 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1392 dev_err(card->dev, "Invalid dai link type %d\n",
1393 dai_link->dobj.type);
1397 lockdep_assert_held(&client_mutex);
1398 /* Notify the machine driver for extra destruction
1399 * on the link created by topology.
1401 if (dai_link->dobj.type && card->remove_dai_link)
1402 card->remove_dai_link(card, dai_link);
1404 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1405 if (link == dai_link) {
1406 list_del(&link->list);
1407 card->num_dai_links--;
1412 EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);
1414 static void soc_set_name_prefix(struct snd_soc_card *card,
1415 struct snd_soc_component *component)
1419 if (card->codec_conf == NULL)
1422 for (i = 0; i < card->num_configs; i++) {
1423 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1424 if (map->of_node && component->dev->of_node != map->of_node)
1426 if (map->dev_name && strcmp(component->name, map->dev_name))
1428 component->name_prefix = map->name_prefix;
1433 static int soc_probe_component(struct snd_soc_card *card,
1434 struct snd_soc_component *component)
1436 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1437 struct snd_soc_dai *dai;
1440 if (!strcmp(component->name, "snd-soc-dummy"))
1443 if (component->card) {
1444 if (component->card != card) {
1445 dev_err(component->dev,
1446 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1447 card->name, component->card->name);
1453 if (!try_module_get(component->dev->driver->owner))
1456 component->card = card;
1458 soc_set_name_prefix(card, component);
1460 soc_init_component_debugfs(component);
1462 if (component->driver->dapm_widgets) {
1463 ret = snd_soc_dapm_new_controls(dapm,
1464 component->driver->dapm_widgets,
1465 component->driver->num_dapm_widgets);
1468 dev_err(component->dev,
1469 "Failed to create new controls %d\n", ret);
1474 list_for_each_entry(dai, &component->dai_list, list) {
1475 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1477 dev_err(component->dev,
1478 "Failed to create DAI widgets %d\n", ret);
1483 if (component->probe) {
1484 ret = component->probe(component);
1486 dev_err(component->dev,
1487 "ASoC: failed to probe component %d\n", ret);
1491 WARN(dapm->idle_bias_off &&
1492 dapm->bias_level != SND_SOC_BIAS_OFF,
1493 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1497 /* machine specific init */
1498 if (component->init) {
1499 ret = component->init(component);
1501 dev_err(component->dev,
1502 "Failed to do machine specific init %d\n", ret);
1507 if (component->driver->controls)
1508 snd_soc_add_component_controls(component,
1509 component->driver->controls,
1510 component->driver->num_controls);
1511 if (component->driver->dapm_routes)
1512 snd_soc_dapm_add_routes(dapm,
1513 component->driver->dapm_routes,
1514 component->driver->num_dapm_routes);
1516 list_add(&dapm->list, &card->dapm_list);
1517 list_add(&component->card_list, &card->component_dev_list);
1522 soc_cleanup_component_debugfs(component);
1523 component->card = NULL;
1524 module_put(component->dev->driver->owner);
1529 static void rtd_release(struct device *dev)
1534 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1539 /* register the rtd device */
1540 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1543 device_initialize(rtd->dev);
1544 rtd->dev->parent = rtd->card->dev;
1545 rtd->dev->release = rtd_release;
1546 rtd->dev->groups = soc_dev_attr_groups;
1547 dev_set_name(rtd->dev, "%s", name);
1548 dev_set_drvdata(rtd->dev, rtd);
1549 mutex_init(&rtd->pcm_mutex);
1550 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1551 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1552 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1553 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1554 ret = device_add(rtd->dev);
1556 /* calling put_device() here to free the rtd->dev */
1557 put_device(rtd->dev);
1558 dev_err(rtd->card->dev,
1559 "ASoC: failed to register runtime device: %d\n", ret);
1562 rtd->dev_registered = 1;
1566 static int soc_probe_link_components(struct snd_soc_card *card,
1567 struct snd_soc_pcm_runtime *rtd,
1570 struct snd_soc_component *component;
1571 struct snd_soc_rtdcom_list *rtdcom;
1574 for_each_rtdcom(rtd, rtdcom) {
1575 component = rtdcom->component;
1577 if (component->driver->probe_order == order) {
1578 ret = soc_probe_component(card, component);
1587 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1590 dai->driver->probe_order != order)
1593 if (dai->driver->probe) {
1594 int ret = dai->driver->probe(dai);
1596 dev_err(dai->dev, "ASoC: failed to probe DAI %s: %d\n",
1607 static int soc_link_dai_pcm_new(struct snd_soc_dai **dais, int num_dais,
1608 struct snd_soc_pcm_runtime *rtd)
1612 for (i = 0; i < num_dais; ++i) {
1613 struct snd_soc_dai_driver *drv = dais[i]->driver;
1615 if (!rtd->dai_link->no_pcm && drv->pcm_new)
1616 ret = drv->pcm_new(rtd, dais[i]);
1618 dev_err(dais[i]->dev,
1619 "ASoC: Failed to bind %s with pcm device\n",
1628 static int soc_link_dai_widgets(struct snd_soc_card *card,
1629 struct snd_soc_dai_link *dai_link,
1630 struct snd_soc_pcm_runtime *rtd)
1632 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1633 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1634 struct snd_soc_dapm_widget *sink, *source;
1637 if (rtd->num_codecs > 1)
1638 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1640 /* link the DAI widgets */
1641 sink = codec_dai->playback_widget;
1642 source = cpu_dai->capture_widget;
1643 if (sink && source) {
1644 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1645 dai_link->num_params,
1648 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1649 sink->name, source->name, ret);
1654 sink = cpu_dai->playback_widget;
1655 source = codec_dai->capture_widget;
1656 if (sink && source) {
1657 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1658 dai_link->num_params,
1661 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1662 sink->name, source->name, ret);
1670 static int soc_probe_link_dais(struct snd_soc_card *card,
1671 struct snd_soc_pcm_runtime *rtd, int order)
1673 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1674 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1677 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1678 card->name, rtd->num, order);
1680 /* set default power off timeout */
1681 rtd->pmdown_time = pmdown_time;
1683 ret = soc_probe_dai(cpu_dai, order);
1687 /* probe the CODEC DAI */
1688 for (i = 0; i < rtd->num_codecs; i++) {
1689 ret = soc_probe_dai(rtd->codec_dais[i], order);
1694 /* complete DAI probe during last probe */
1695 if (order != SND_SOC_COMP_ORDER_LAST)
1698 /* do machine specific initialization */
1699 if (dai_link->init) {
1700 ret = dai_link->init(rtd);
1702 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1703 dai_link->name, ret);
1708 if (dai_link->dai_fmt)
1709 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1711 ret = soc_post_component_init(rtd, dai_link->name);
1715 #ifdef CONFIG_DEBUG_FS
1716 /* add DPCM sysfs entries */
1717 if (dai_link->dynamic)
1718 soc_dpcm_debugfs_add(rtd);
1721 if (cpu_dai->driver->compress_new) {
1722 /*create compress_device"*/
1723 ret = cpu_dai->driver->compress_new(rtd, rtd->num);
1725 dev_err(card->dev, "ASoC: can't create compress %s\n",
1726 dai_link->stream_name);
1731 if (!dai_link->params) {
1732 /* create the pcm */
1733 ret = soc_new_pcm(rtd, rtd->num);
1735 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1736 dai_link->stream_name, ret);
1739 ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd);
1742 ret = soc_link_dai_pcm_new(rtd->codec_dais,
1743 rtd->num_codecs, rtd);
1747 INIT_DELAYED_WORK(&rtd->delayed_work,
1748 codec2codec_close_delayed_work);
1750 /* link the DAI widgets */
1751 ret = soc_link_dai_widgets(card, dai_link, rtd);
1760 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1762 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1763 struct snd_soc_component *component;
1765 struct device_node *codec_of_node;
1767 if (aux_dev->codec_of_node || aux_dev->codec_name) {
1768 /* codecs, usually analog devices */
1769 name = aux_dev->codec_name;
1770 codec_of_node = aux_dev->codec_of_node;
1771 component = soc_find_component(codec_of_node, name);
1774 name = of_node_full_name(codec_of_node);
1777 } else if (aux_dev->name) {
1778 /* generic components */
1779 name = aux_dev->name;
1780 component = soc_find_component(NULL, name);
1784 dev_err(card->dev, "ASoC: Invalid auxiliary device\n");
1788 component->init = aux_dev->init;
1789 list_add(&component->card_aux_list, &card->aux_comp_list);
1794 dev_err(card->dev, "ASoC: %s not registered\n", name);
1795 return -EPROBE_DEFER;
1798 static int soc_probe_aux_devices(struct snd_soc_card *card)
1800 struct snd_soc_component *comp;
1804 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1806 list_for_each_entry(comp, &card->aux_comp_list, card_aux_list) {
1807 if (comp->driver->probe_order == order) {
1808 ret = soc_probe_component(card, comp);
1811 "ASoC: failed to probe aux component %s %d\n",
1822 static void soc_remove_aux_devices(struct snd_soc_card *card)
1824 struct snd_soc_component *comp, *_comp;
1827 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1829 list_for_each_entry_safe(comp, _comp,
1830 &card->aux_comp_list, card_aux_list) {
1832 if (comp->driver->remove_order == order) {
1833 soc_remove_component(comp);
1834 /* remove it from the card's aux_comp_list */
1835 list_del(&comp->card_aux_list);
1841 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1845 if (codec->cache_init)
1848 ret = snd_soc_cache_init(codec);
1851 "ASoC: Failed to set cache compression type: %d\n",
1855 codec->cache_init = 1;
1860 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1861 * @rtd: The runtime for which the DAI link format should be changed
1862 * @dai_fmt: The new DAI link format
1864 * This function updates the DAI link format for all DAIs connected to the DAI
1865 * link for the specified runtime.
1867 * Note: For setups with a static format set the dai_fmt field in the
1868 * corresponding snd_dai_link struct instead of using this function.
1870 * Returns 0 on success, otherwise a negative error code.
1872 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1873 unsigned int dai_fmt)
1875 struct snd_soc_dai **codec_dais = rtd->codec_dais;
1876 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1880 for (i = 0; i < rtd->num_codecs; i++) {
1881 struct snd_soc_dai *codec_dai = codec_dais[i];
1883 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1884 if (ret != 0 && ret != -ENOTSUPP) {
1885 dev_warn(codec_dai->dev,
1886 "ASoC: Failed to set DAI format: %d\n", ret);
1891 /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1892 /* the component which has non_legacy_dai_naming is Codec */
1893 if (cpu_dai->codec ||
1894 cpu_dai->component->driver->non_legacy_dai_naming) {
1895 unsigned int inv_dai_fmt;
1897 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1898 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1899 case SND_SOC_DAIFMT_CBM_CFM:
1900 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1902 case SND_SOC_DAIFMT_CBM_CFS:
1903 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1905 case SND_SOC_DAIFMT_CBS_CFM:
1906 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1908 case SND_SOC_DAIFMT_CBS_CFS:
1909 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1913 dai_fmt = inv_dai_fmt;
1916 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1917 if (ret != 0 && ret != -ENOTSUPP) {
1918 dev_warn(cpu_dai->dev,
1919 "ASoC: Failed to set DAI format: %d\n", ret);
1925 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1929 /* Trim special characters, and replace '-' with '_' since '-' is used to
1930 * separate different DMI fields in the card long name. Only number and
1931 * alphabet characters and a few separator characters are kept.
1933 static void cleanup_dmi_name(char *name)
1937 for (i = 0; name[i]; i++) {
1938 if (isalnum(name[i]) || (name[i] == '.')
1939 || (name[i] == '_'))
1940 name[j++] = name[i];
1941 else if (name[i] == '-')
1948 /* Check if a DMI field is valid, i.e. not containing any string
1949 * in the black list.
1951 static int is_dmi_valid(const char *field)
1955 while (dmi_blacklist[i]) {
1956 if (strstr(field, dmi_blacklist[i]))
1965 * snd_soc_set_dmi_name() - Register DMI names to card
1966 * @card: The card to register DMI names
1967 * @flavour: The flavour "differentiator" for the card amongst its peers.
1969 * An Intel machine driver may be used by many different devices but are
1970 * difficult for userspace to differentiate, since machine drivers ususally
1971 * use their own name as the card short name and leave the card long name
1972 * blank. To differentiate such devices and fix bugs due to lack of
1973 * device-specific configurations, this function allows DMI info to be used
1974 * as the sound card long name, in the format of
1975 * "vendor-product-version-board"
1976 * (Character '-' is used to separate different DMI fields here).
1977 * This will help the user space to load the device-specific Use Case Manager
1978 * (UCM) configurations for the card.
1980 * Possible card long names may be:
1981 * DellInc.-XPS139343-01-0310JH
1982 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1983 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1985 * This function also supports flavoring the card longname to provide
1986 * the extra differentiation, like "vendor-product-version-board-flavor".
1988 * We only keep number and alphabet characters and a few separator characters
1989 * in the card long name since UCM in the user space uses the card long names
1990 * as card configuration directory names and AudoConf cannot support special
1991 * charactors like SPACE.
1993 * Returns 0 on success, otherwise a negative error code.
1995 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1997 const char *vendor, *product, *product_version, *board;
1998 size_t longname_buf_size = sizeof(card->snd_card->longname);
2001 if (card->long_name)
2002 return 0; /* long name already set by driver or from DMI */
2004 /* make up dmi long name as: vendor.product.version.board */
2005 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
2006 if (!vendor || !is_dmi_valid(vendor)) {
2007 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
2012 snprintf(card->dmi_longname, sizeof(card->snd_card->longname),
2014 cleanup_dmi_name(card->dmi_longname);
2016 product = dmi_get_system_info(DMI_PRODUCT_NAME);
2017 if (product && is_dmi_valid(product)) {
2018 len = strlen(card->dmi_longname);
2019 snprintf(card->dmi_longname + len,
2020 longname_buf_size - len,
2023 len++; /* skip the separator "-" */
2024 if (len < longname_buf_size)
2025 cleanup_dmi_name(card->dmi_longname + len);
2027 /* some vendors like Lenovo may only put a self-explanatory
2028 * name in the product version field
2030 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
2031 if (product_version && is_dmi_valid(product_version)) {
2032 len = strlen(card->dmi_longname);
2033 snprintf(card->dmi_longname + len,
2034 longname_buf_size - len,
2035 "-%s", product_version);
2038 if (len < longname_buf_size)
2039 cleanup_dmi_name(card->dmi_longname + len);
2043 board = dmi_get_system_info(DMI_BOARD_NAME);
2044 if (board && is_dmi_valid(board)) {
2045 len = strlen(card->dmi_longname);
2046 snprintf(card->dmi_longname + len,
2047 longname_buf_size - len,
2051 if (len < longname_buf_size)
2052 cleanup_dmi_name(card->dmi_longname + len);
2053 } else if (!product) {
2054 /* fall back to using legacy name */
2055 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
2059 /* Add flavour to dmi long name */
2061 len = strlen(card->dmi_longname);
2062 snprintf(card->dmi_longname + len,
2063 longname_buf_size - len,
2067 if (len < longname_buf_size)
2068 cleanup_dmi_name(card->dmi_longname + len);
2071 /* set the card long name */
2072 card->long_name = card->dmi_longname;
2076 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
2077 #endif /* CONFIG_DMI */
2079 static int snd_soc_instantiate_card(struct snd_soc_card *card)
2081 struct snd_soc_codec *codec;
2082 struct snd_soc_pcm_runtime *rtd;
2083 struct snd_soc_dai_link *dai_link;
2086 mutex_lock(&client_mutex);
2087 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
2090 for (i = 0; i < card->num_links; i++) {
2091 ret = soc_bind_dai_link(card, &card->dai_link[i]);
2096 /* bind aux_devs too */
2097 for (i = 0; i < card->num_aux_devs; i++) {
2098 ret = soc_bind_aux_dev(card, i);
2103 /* add predefined DAI links to the list */
2104 for (i = 0; i < card->num_links; i++)
2105 snd_soc_add_dai_link(card, card->dai_link+i);
2107 /* initialize the register cache for each available codec */
2108 list_for_each_entry(codec, &codec_list, list) {
2109 if (codec->cache_init)
2111 ret = snd_soc_init_codec_cache(codec);
2116 /* card bind complete so register a sound card */
2117 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2118 card->owner, 0, &card->snd_card);
2121 "ASoC: can't create sound card for card %s: %d\n",
2126 soc_init_card_debugfs(card);
2128 card->dapm.bias_level = SND_SOC_BIAS_OFF;
2129 card->dapm.dev = card->dev;
2130 card->dapm.card = card;
2131 list_add(&card->dapm.list, &card->dapm_list);
2133 #ifdef CONFIG_DEBUG_FS
2134 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
2137 #ifdef CONFIG_PM_SLEEP
2138 /* deferred resume work */
2139 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
2142 if (card->dapm_widgets)
2143 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2144 card->num_dapm_widgets);
2146 if (card->of_dapm_widgets)
2147 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2148 card->num_of_dapm_widgets);
2150 /* initialise the sound card only once */
2152 ret = card->probe(card);
2154 goto card_probe_error;
2157 /* probe all components used by DAI links on this card */
2158 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
2160 list_for_each_entry(rtd, &card->rtd_list, list) {
2161 ret = soc_probe_link_components(card, rtd, order);
2164 "ASoC: failed to instantiate card %d\n",
2171 /* probe auxiliary components */
2172 ret = soc_probe_aux_devices(card);
2176 /* Find new DAI links added during probing components and bind them.
2177 * Components with topology may bring new DAIs and DAI links.
2179 list_for_each_entry(dai_link, &card->dai_link_list, list) {
2180 if (soc_is_dai_link_bound(card, dai_link))
2183 ret = soc_init_dai_link(card, dai_link);
2186 ret = soc_bind_dai_link(card, dai_link);
2191 /* probe all DAI links on this card */
2192 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
2194 list_for_each_entry(rtd, &card->rtd_list, list) {
2195 ret = soc_probe_link_dais(card, rtd, order);
2198 "ASoC: failed to instantiate card %d\n",
2205 snd_soc_dapm_link_dai_widgets(card);
2206 snd_soc_dapm_connect_dai_link_widgets(card);
2209 snd_soc_add_card_controls(card, card->controls, card->num_controls);
2211 if (card->dapm_routes)
2212 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2213 card->num_dapm_routes);
2215 if (card->of_dapm_routes)
2216 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2217 card->num_of_dapm_routes);
2219 /* try to set some sane longname if DMI is available */
2220 snd_soc_set_dmi_name(card, NULL);
2222 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
2224 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
2225 "%s", card->long_name ? card->long_name : card->name);
2226 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
2227 "%s", card->driver_name ? card->driver_name : card->name);
2228 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
2229 switch (card->snd_card->driver[i]) {
2235 if (!isalnum(card->snd_card->driver[i]))
2236 card->snd_card->driver[i] = '_';
2241 if (card->late_probe) {
2242 ret = card->late_probe(card);
2244 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2246 goto probe_aux_dev_err;
2250 snd_soc_dapm_new_widgets(card);
2252 ret = snd_card_register(card->snd_card);
2254 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2256 goto probe_aux_dev_err;
2259 card->instantiated = 1;
2260 snd_soc_dapm_sync(&card->dapm);
2261 mutex_unlock(&card->mutex);
2262 mutex_unlock(&client_mutex);
2267 soc_remove_aux_devices(card);
2270 soc_remove_dai_links(card);
2276 snd_soc_dapm_free(&card->dapm);
2277 soc_cleanup_card_debugfs(card);
2278 snd_card_free(card->snd_card);
2281 soc_remove_pcm_runtimes(card);
2282 mutex_unlock(&card->mutex);
2283 mutex_unlock(&client_mutex);
2288 /* probes a new socdev */
2289 static int soc_probe(struct platform_device *pdev)
2291 struct snd_soc_card *card = platform_get_drvdata(pdev);
2294 * no card, so machine driver should be registering card
2295 * we should not be here in that case so ret error
2300 dev_warn(&pdev->dev,
2301 "ASoC: machine %s should use snd_soc_register_card()\n",
2304 /* Bodge while we unpick instantiation */
2305 card->dev = &pdev->dev;
2307 return snd_soc_register_card(card);
2310 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2312 struct snd_soc_pcm_runtime *rtd;
2314 /* make sure any delayed work runs */
2315 list_for_each_entry(rtd, &card->rtd_list, list)
2316 flush_delayed_work(&rtd->delayed_work);
2318 /* free the ALSA card at first; this syncs with pending operations */
2319 snd_card_free(card->snd_card);
2321 /* remove and free each DAI */
2322 soc_remove_dai_links(card);
2323 soc_remove_pcm_runtimes(card);
2325 /* remove auxiliary devices */
2326 soc_remove_aux_devices(card);
2328 snd_soc_dapm_free(&card->dapm);
2329 soc_cleanup_card_debugfs(card);
2331 /* remove the card */
2338 /* removes a socdev */
2339 static int soc_remove(struct platform_device *pdev)
2341 struct snd_soc_card *card = platform_get_drvdata(pdev);
2343 snd_soc_unregister_card(card);
2347 int snd_soc_poweroff(struct device *dev)
2349 struct snd_soc_card *card = dev_get_drvdata(dev);
2350 struct snd_soc_pcm_runtime *rtd;
2352 if (!card->instantiated)
2355 /* Flush out pmdown_time work - we actually do want to run it
2356 * now, we're shutting down so no imminent restart. */
2357 list_for_each_entry(rtd, &card->rtd_list, list)
2358 flush_delayed_work(&rtd->delayed_work);
2360 snd_soc_dapm_shutdown(card);
2362 /* deactivate pins to sleep state */
2363 list_for_each_entry(rtd, &card->rtd_list, list) {
2364 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2367 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2368 for (i = 0; i < rtd->num_codecs; i++) {
2369 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
2370 pinctrl_pm_select_sleep_state(codec_dai->dev);
2376 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2378 const struct dev_pm_ops snd_soc_pm_ops = {
2379 .suspend = snd_soc_suspend,
2380 .resume = snd_soc_resume,
2381 .freeze = snd_soc_suspend,
2382 .thaw = snd_soc_resume,
2383 .poweroff = snd_soc_poweroff,
2384 .restore = snd_soc_resume,
2386 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2388 /* ASoC platform driver */
2389 static struct platform_driver soc_driver = {
2391 .name = "soc-audio",
2392 .pm = &snd_soc_pm_ops,
2395 .remove = soc_remove,
2399 * snd_soc_cnew - create new control
2400 * @_template: control template
2401 * @data: control private data
2402 * @long_name: control long name
2403 * @prefix: control name prefix
2405 * Create a new mixer control from a template control.
2407 * Returns 0 for success, else error.
2409 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2410 void *data, const char *long_name,
2413 struct snd_kcontrol_new template;
2414 struct snd_kcontrol *kcontrol;
2417 memcpy(&template, _template, sizeof(template));
2421 long_name = template.name;
2424 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2428 template.name = name;
2430 template.name = long_name;
2433 kcontrol = snd_ctl_new1(&template, data);
2439 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2441 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2442 const struct snd_kcontrol_new *controls, int num_controls,
2443 const char *prefix, void *data)
2447 for (i = 0; i < num_controls; i++) {
2448 const struct snd_kcontrol_new *control = &controls[i];
2449 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2450 control->name, prefix));
2452 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2453 control->name, err);
2461 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2464 struct snd_card *card = soc_card->snd_card;
2465 struct snd_kcontrol *kctl;
2467 if (unlikely(!name))
2470 list_for_each_entry(kctl, &card->controls, list)
2471 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2475 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2478 * snd_soc_add_component_controls - Add an array of controls to a component.
2480 * @component: Component to add controls to
2481 * @controls: Array of controls to add
2482 * @num_controls: Number of elements in the array
2484 * Return: 0 for success, else error.
2486 int snd_soc_add_component_controls(struct snd_soc_component *component,
2487 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2489 struct snd_card *card = component->card->snd_card;
2491 return snd_soc_add_controls(card, component->dev, controls,
2492 num_controls, component->name_prefix, component);
2494 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2497 * snd_soc_add_codec_controls - add an array of controls to a codec.
2498 * Convenience function to add a list of controls. Many codecs were
2499 * duplicating this code.
2501 * @codec: codec to add controls to
2502 * @controls: array of controls to add
2503 * @num_controls: number of elements in the array
2505 * Return 0 for success, else error.
2507 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2508 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2510 return snd_soc_add_component_controls(&codec->component, controls,
2513 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
2516 * snd_soc_add_platform_controls - add an array of controls to a platform.
2517 * Convenience function to add a list of controls.
2519 * @platform: platform to add controls to
2520 * @controls: array of controls to add
2521 * @num_controls: number of elements in the array
2523 * Return 0 for success, else error.
2525 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2526 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2528 return snd_soc_add_component_controls(&platform->component, controls,
2531 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2534 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2535 * Convenience function to add a list of controls.
2537 * @soc_card: SoC card to add controls to
2538 * @controls: array of controls to add
2539 * @num_controls: number of elements in the array
2541 * Return 0 for success, else error.
2543 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2544 const struct snd_kcontrol_new *controls, int num_controls)
2546 struct snd_card *card = soc_card->snd_card;
2548 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2551 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2554 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2555 * Convienience function to add a list of controls.
2557 * @dai: DAI to add controls to
2558 * @controls: array of controls to add
2559 * @num_controls: number of elements in the array
2561 * Return 0 for success, else error.
2563 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2564 const struct snd_kcontrol_new *controls, int num_controls)
2566 struct snd_card *card = dai->component->card->snd_card;
2568 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2571 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2574 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2576 * @clk_id: DAI specific clock ID
2577 * @freq: new clock frequency in Hz
2578 * @dir: new clock direction - input/output.
2580 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2582 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2583 unsigned int freq, int dir)
2585 if (dai->driver->ops->set_sysclk)
2586 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2588 return snd_soc_component_set_sysclk(dai->component, clk_id, 0,
2591 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2594 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2596 * @clk_id: DAI specific clock ID
2597 * @source: Source for the clock
2598 * @freq: new clock frequency in Hz
2599 * @dir: new clock direction - input/output.
2601 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2603 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2604 int source, unsigned int freq, int dir)
2606 if (codec->driver->set_sysclk)
2607 return codec->driver->set_sysclk(codec, clk_id, source,
2612 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2615 * snd_soc_component_set_sysclk - configure COMPONENT system or master clock.
2616 * @component: COMPONENT
2617 * @clk_id: DAI specific clock ID
2618 * @source: Source for the clock
2619 * @freq: new clock frequency in Hz
2620 * @dir: new clock direction - input/output.
2622 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2624 int snd_soc_component_set_sysclk(struct snd_soc_component *component, int clk_id,
2625 int source, unsigned int freq, int dir)
2627 /* will be removed */
2628 if (component->set_sysclk)
2629 return component->set_sysclk(component, clk_id, source,
2632 if (component->driver->set_sysclk)
2633 return component->driver->set_sysclk(component, clk_id, source,
2638 EXPORT_SYMBOL_GPL(snd_soc_component_set_sysclk);
2641 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2643 * @div_id: DAI specific clock divider ID
2644 * @div: new clock divisor.
2646 * Configures the clock dividers. This is used to derive the best DAI bit and
2647 * frame clocks from the system or master clock. It's best to set the DAI bit
2648 * and frame clocks as low as possible to save system power.
2650 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2651 int div_id, int div)
2653 if (dai->driver->ops->set_clkdiv)
2654 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2658 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2661 * snd_soc_dai_set_pll - configure DAI PLL.
2663 * @pll_id: DAI specific PLL ID
2664 * @source: DAI specific source for the PLL
2665 * @freq_in: PLL input clock frequency in Hz
2666 * @freq_out: requested PLL output clock frequency in Hz
2668 * Configures and enables PLL to generate output clock based on input clock.
2670 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2671 unsigned int freq_in, unsigned int freq_out)
2673 if (dai->driver->ops->set_pll)
2674 return dai->driver->ops->set_pll(dai, pll_id, source,
2677 return snd_soc_component_set_pll(dai->component, pll_id, source,
2680 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2683 * snd_soc_codec_set_pll - configure codec PLL.
2685 * @pll_id: DAI specific PLL ID
2686 * @source: DAI specific source for the PLL
2687 * @freq_in: PLL input clock frequency in Hz
2688 * @freq_out: requested PLL output clock frequency in Hz
2690 * Configures and enables PLL to generate output clock based on input clock.
2692 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2693 unsigned int freq_in, unsigned int freq_out)
2695 if (codec->driver->set_pll)
2696 return codec->driver->set_pll(codec, pll_id, source,
2701 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2704 * snd_soc_component_set_pll - configure component PLL.
2705 * @component: COMPONENT
2706 * @pll_id: DAI specific PLL ID
2707 * @source: DAI specific source for the PLL
2708 * @freq_in: PLL input clock frequency in Hz
2709 * @freq_out: requested PLL output clock frequency in Hz
2711 * Configures and enables PLL to generate output clock based on input clock.
2713 int snd_soc_component_set_pll(struct snd_soc_component *component, int pll_id,
2714 int source, unsigned int freq_in,
2715 unsigned int freq_out)
2717 /* will be removed */
2718 if (component->set_pll)
2719 return component->set_pll(component, pll_id, source,
2722 if (component->driver->set_pll)
2723 return component->driver->set_pll(component, pll_id, source,
2728 EXPORT_SYMBOL_GPL(snd_soc_component_set_pll);
2731 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2733 * @ratio: Ratio of BCLK to Sample rate.
2735 * Configures the DAI for a preset BCLK to sample rate ratio.
2737 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2739 if (dai->driver->ops->set_bclk_ratio)
2740 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2744 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2747 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2749 * @fmt: SND_SOC_DAIFMT_* format value.
2751 * Configures the DAI hardware format and clocking.
2753 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2755 if (dai->driver == NULL)
2757 if (dai->driver->ops->set_fmt == NULL)
2759 return dai->driver->ops->set_fmt(dai, fmt);
2761 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2764 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2765 * @slots: Number of slots in use.
2766 * @tx_mask: bitmask representing active TX slots.
2767 * @rx_mask: bitmask representing active RX slots.
2769 * Generates the TDM tx and rx slot default masks for DAI.
2771 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2772 unsigned int *tx_mask,
2773 unsigned int *rx_mask)
2775 if (*tx_mask || *rx_mask)
2781 *tx_mask = (1 << slots) - 1;
2782 *rx_mask = (1 << slots) - 1;
2788 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2789 * @dai: The DAI to configure
2790 * @tx_mask: bitmask representing active TX slots.
2791 * @rx_mask: bitmask representing active RX slots.
2792 * @slots: Number of slots in use.
2793 * @slot_width: Width in bits for each slot.
2795 * This function configures the specified DAI for TDM operation. @slot contains
2796 * the total number of slots of the TDM stream and @slot_with the width of each
2797 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2798 * active slots of the TDM stream for the specified DAI, i.e. which slots the
2799 * DAI should write to or read from. If a bit is set the corresponding slot is
2800 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2801 * the first slot, bit 1 to the second slot and so on. The first active slot
2802 * maps to the first channel of the DAI, the second active slot to the second
2803 * channel and so on.
2805 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2806 * @rx_mask and @slot_width will be ignored.
2808 * Returns 0 on success, a negative error code otherwise.
2810 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2811 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2813 if (dai->driver->ops->xlate_tdm_slot_mask)
2814 dai->driver->ops->xlate_tdm_slot_mask(slots,
2815 &tx_mask, &rx_mask);
2817 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2819 dai->tx_mask = tx_mask;
2820 dai->rx_mask = rx_mask;
2822 if (dai->driver->ops->set_tdm_slot)
2823 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2828 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2831 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2833 * @tx_num: how many TX channels
2834 * @tx_slot: pointer to an array which imply the TX slot number channel
2836 * @rx_num: how many RX channels
2837 * @rx_slot: pointer to an array which imply the RX slot number channel
2840 * configure the relationship between channel number and TDM slot number.
2842 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2843 unsigned int tx_num, unsigned int *tx_slot,
2844 unsigned int rx_num, unsigned int *rx_slot)
2846 if (dai->driver->ops->set_channel_map)
2847 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2852 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2855 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2857 * @tristate: tristate enable
2859 * Tristates the DAI so that others can use it.
2861 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2863 if (dai->driver->ops->set_tristate)
2864 return dai->driver->ops->set_tristate(dai, tristate);
2868 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2871 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2873 * @mute: mute enable
2874 * @direction: stream to mute
2876 * Mutes the DAI DAC.
2878 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2884 if (dai->driver->ops->mute_stream)
2885 return dai->driver->ops->mute_stream(dai, mute, direction);
2886 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2887 dai->driver->ops->digital_mute)
2888 return dai->driver->ops->digital_mute(dai, mute);
2892 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2895 * snd_soc_register_card - Register a card with the ASoC core
2897 * @card: Card to register
2900 int snd_soc_register_card(struct snd_soc_card *card)
2903 struct snd_soc_pcm_runtime *rtd;
2905 if (!card->name || !card->dev)
2908 for (i = 0; i < card->num_links; i++) {
2909 struct snd_soc_dai_link *link = &card->dai_link[i];
2911 ret = soc_init_dai_link(card, link);
2913 dev_err(card->dev, "ASoC: failed to init link %s\n",
2919 dev_set_drvdata(card->dev, card);
2921 snd_soc_initialize_card_lists(card);
2923 INIT_LIST_HEAD(&card->dai_link_list);
2924 card->num_dai_links = 0;
2926 INIT_LIST_HEAD(&card->rtd_list);
2929 INIT_LIST_HEAD(&card->dapm_dirty);
2930 INIT_LIST_HEAD(&card->dobj_list);
2931 card->instantiated = 0;
2932 mutex_init(&card->mutex);
2933 mutex_init(&card->dapm_mutex);
2935 ret = snd_soc_instantiate_card(card);
2939 /* deactivate pins to sleep state */
2940 list_for_each_entry(rtd, &card->rtd_list, list) {
2941 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2944 for (j = 0; j < rtd->num_codecs; j++) {
2945 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2946 if (!codec_dai->active)
2947 pinctrl_pm_select_sleep_state(codec_dai->dev);
2950 if (!cpu_dai->active)
2951 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2956 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2959 * snd_soc_unregister_card - Unregister a card with the ASoC core
2961 * @card: Card to unregister
2964 int snd_soc_unregister_card(struct snd_soc_card *card)
2966 if (card->instantiated) {
2967 card->instantiated = false;
2968 snd_soc_dapm_shutdown(card);
2969 soc_cleanup_card_resources(card);
2970 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2975 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2978 * Simplify DAI link configuration by removing ".-1" from device names
2979 * and sanitizing names.
2981 static char *fmt_single_name(struct device *dev, int *id)
2983 char *found, name[NAME_SIZE];
2986 if (dev_name(dev) == NULL)
2989 strlcpy(name, dev_name(dev), NAME_SIZE);
2991 /* are we a "%s.%d" name (platform and SPI components) */
2992 found = strstr(name, dev->driver->name);
2995 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2997 /* discard ID from name if ID == -1 */
2999 found[strlen(dev->driver->name)] = '\0';
3003 /* I2C component devices are named "bus-addr" */
3004 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3005 char tmp[NAME_SIZE];
3007 /* create unique ID number from I2C addr and bus */
3008 *id = ((id1 & 0xffff) << 16) + id2;
3010 /* sanitize component name for DAI link creation */
3011 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3012 strlcpy(name, tmp, NAME_SIZE);
3017 return kstrdup(name, GFP_KERNEL);
3021 * Simplify DAI link naming for single devices with multiple DAIs by removing
3022 * any ".-1" and using the DAI name (instead of device name).
3024 static inline char *fmt_multiple_name(struct device *dev,
3025 struct snd_soc_dai_driver *dai_drv)
3027 if (dai_drv->name == NULL) {
3029 "ASoC: error - multiple DAI %s registered with no name\n",
3034 return kstrdup(dai_drv->name, GFP_KERNEL);
3038 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
3040 * @component: The component for which the DAIs should be unregistered
3042 static void snd_soc_unregister_dais(struct snd_soc_component *component)
3044 struct snd_soc_dai *dai, *_dai;
3046 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
3047 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
3049 list_del(&dai->list);
3055 /* Create a DAI and add it to the component's DAI list */
3056 static struct snd_soc_dai *soc_add_dai(struct snd_soc_component *component,
3057 struct snd_soc_dai_driver *dai_drv,
3058 bool legacy_dai_naming)
3060 struct device *dev = component->dev;
3061 struct snd_soc_dai *dai;
3063 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
3065 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3070 * Back in the old days when we still had component-less DAIs,
3071 * instead of having a static name, component-less DAIs would
3072 * inherit the name of the parent device so it is possible to
3073 * register multiple instances of the DAI. We still need to keep
3074 * the same naming style even though those DAIs are not
3075 * component-less anymore.
3077 if (legacy_dai_naming &&
3078 (dai_drv->id == 0 || dai_drv->name == NULL)) {
3079 dai->name = fmt_single_name(dev, &dai->id);
3081 dai->name = fmt_multiple_name(dev, dai_drv);
3083 dai->id = dai_drv->id;
3085 dai->id = component->num_dai;
3087 if (dai->name == NULL) {
3092 dai->component = component;
3094 dai->driver = dai_drv;
3095 if (!dai->driver->ops)
3096 dai->driver->ops = &null_dai_ops;
3098 list_add_tail(&dai->list, &component->dai_list);
3099 component->num_dai++;
3101 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
3106 * snd_soc_register_dais - Register a DAI with the ASoC core
3108 * @component: The component the DAIs are registered for
3109 * @dai_drv: DAI driver to use for the DAIs
3110 * @count: Number of DAIs
3111 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
3114 static int snd_soc_register_dais(struct snd_soc_component *component,
3115 struct snd_soc_dai_driver *dai_drv, size_t count,
3116 bool legacy_dai_naming)
3118 struct device *dev = component->dev;
3119 struct snd_soc_dai *dai;
3123 dev_dbg(dev, "ASoC: dai register %s #%zu\n", dev_name(dev), count);
3125 for (i = 0; i < count; i++) {
3127 dai = soc_add_dai(component, dai_drv + i,
3128 count == 1 && legacy_dai_naming);
3138 snd_soc_unregister_dais(component);
3144 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
3146 * @component: The component the DAIs are registered for
3147 * @dai_drv: DAI driver to use for the DAI
3149 * Topology can use this API to register DAIs when probing a component.
3150 * These DAIs's widgets will be freed in the card cleanup and the DAIs
3151 * will be freed in the component cleanup.
3153 int snd_soc_register_dai(struct snd_soc_component *component,
3154 struct snd_soc_dai_driver *dai_drv)
3156 struct snd_soc_dapm_context *dapm =
3157 snd_soc_component_get_dapm(component);
3158 struct snd_soc_dai *dai;
3161 if (dai_drv->dobj.type != SND_SOC_DOBJ_PCM) {
3162 dev_err(component->dev, "Invalid dai type %d\n",
3163 dai_drv->dobj.type);
3167 lockdep_assert_held(&client_mutex);
3168 dai = soc_add_dai(component, dai_drv, false);
3172 /* Create the DAI widgets here. After adding DAIs, topology may
3173 * also add routes that need these widgets as source or sink.
3175 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
3177 dev_err(component->dev,
3178 "Failed to create DAI widgets %d\n", ret);
3183 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3185 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
3186 enum snd_soc_dapm_type type, int subseq)
3188 struct snd_soc_component *component = dapm->component;
3190 component->driver->seq_notifier(component, type, subseq);
3193 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
3196 struct snd_soc_component *component = dapm->component;
3198 return component->driver->stream_event(component, event);
3201 static int snd_soc_component_drv_pcm_new(struct snd_soc_component *component,
3202 struct snd_soc_pcm_runtime *rtd)
3204 if (component->driver->pcm_new)
3205 return component->driver->pcm_new(rtd);
3210 static void snd_soc_component_drv_pcm_free(struct snd_soc_component *component,
3211 struct snd_pcm *pcm)
3213 if (component->driver->pcm_free)
3214 component->driver->pcm_free(pcm);
3217 static int snd_soc_component_set_bias_level(struct snd_soc_dapm_context *dapm,
3218 enum snd_soc_bias_level level)
3220 struct snd_soc_component *component = dapm->component;
3222 return component->driver->set_bias_level(component, level);
3225 static int snd_soc_component_initialize(struct snd_soc_component *component,
3226 const struct snd_soc_component_driver *driver, struct device *dev)
3228 struct snd_soc_dapm_context *dapm;
3230 component->name = fmt_single_name(dev, &component->id);
3231 if (!component->name) {
3232 dev_err(dev, "ASoC: Failed to allocate name\n");
3236 component->dev = dev;
3237 component->driver = driver;
3238 component->probe = component->driver->probe;
3239 component->remove = component->driver->remove;
3240 component->suspend = component->driver->suspend;
3241 component->resume = component->driver->resume;
3242 component->set_sysclk = component->driver->set_sysclk;
3243 component->set_pll = component->driver->set_pll;
3244 component->set_jack = component->driver->set_jack;
3245 component->pcm_new = snd_soc_component_drv_pcm_new;
3246 component->pcm_free = snd_soc_component_drv_pcm_free;
3248 dapm = snd_soc_component_get_dapm(component);
3250 dapm->component = component;
3251 dapm->bias_level = SND_SOC_BIAS_OFF;
3252 dapm->idle_bias_off = !driver->idle_bias_on;
3253 dapm->suspend_bias_off = driver->suspend_bias_off;
3254 if (driver->seq_notifier)
3255 dapm->seq_notifier = snd_soc_component_seq_notifier;
3256 if (driver->stream_event)
3257 dapm->stream_event = snd_soc_component_stream_event;
3258 if (driver->set_bias_level)
3259 dapm->set_bias_level = snd_soc_component_set_bias_level;
3261 INIT_LIST_HEAD(&component->dai_list);
3262 mutex_init(&component->io_mutex);
3267 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
3269 int val_bytes = regmap_get_val_bytes(component->regmap);
3271 /* Errors are legitimate for non-integer byte multiples */
3273 component->val_bytes = val_bytes;
3276 #ifdef CONFIG_REGMAP
3279 * snd_soc_component_init_regmap() - Initialize regmap instance for the component
3280 * @component: The component for which to initialize the regmap instance
3281 * @regmap: The regmap instance that should be used by the component
3283 * This function allows deferred assignment of the regmap instance that is
3284 * associated with the component. Only use this if the regmap instance is not
3285 * yet ready when the component is registered. The function must also be called
3286 * before the first IO attempt of the component.
3288 void snd_soc_component_init_regmap(struct snd_soc_component *component,
3289 struct regmap *regmap)
3291 component->regmap = regmap;
3292 snd_soc_component_setup_regmap(component);
3294 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
3297 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
3298 * @component: The component for which to de-initialize the regmap instance
3300 * Calls regmap_exit() on the regmap instance associated to the component and
3301 * removes the regmap instance from the component.
3303 * This function should only be used if snd_soc_component_init_regmap() was used
3304 * to initialize the regmap instance.
3306 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
3308 regmap_exit(component->regmap);
3309 component->regmap = NULL;
3311 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
3315 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
3317 if (!component->write && !component->read) {
3318 if (!component->regmap)
3319 component->regmap = dev_get_regmap(component->dev, NULL);
3320 if (component->regmap)
3321 snd_soc_component_setup_regmap(component);
3324 list_add(&component->list, &component_list);
3325 INIT_LIST_HEAD(&component->dobj_list);
3328 static void snd_soc_component_add(struct snd_soc_component *component)
3330 mutex_lock(&client_mutex);
3331 snd_soc_component_add_unlocked(component);
3332 mutex_unlock(&client_mutex);
3335 static void snd_soc_component_cleanup(struct snd_soc_component *component)
3337 snd_soc_unregister_dais(component);
3338 kfree(component->name);
3341 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
3343 struct snd_soc_card *card = component->card;
3346 snd_soc_unregister_card(card);
3348 list_del(&component->list);
3351 #define ENDIANNESS_MAP(name) \
3352 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
3353 static u64 endianness_format_map[] = {
3354 ENDIANNESS_MAP(S16_),
3355 ENDIANNESS_MAP(U16_),
3356 ENDIANNESS_MAP(S24_),
3357 ENDIANNESS_MAP(U24_),
3358 ENDIANNESS_MAP(S32_),
3359 ENDIANNESS_MAP(U32_),
3360 ENDIANNESS_MAP(S24_3),
3361 ENDIANNESS_MAP(U24_3),
3362 ENDIANNESS_MAP(S20_3),
3363 ENDIANNESS_MAP(U20_3),
3364 ENDIANNESS_MAP(S18_3),
3365 ENDIANNESS_MAP(U18_3),
3366 ENDIANNESS_MAP(FLOAT_),
3367 ENDIANNESS_MAP(FLOAT64_),
3368 ENDIANNESS_MAP(IEC958_SUBFRAME_),
3372 * Fix up the DAI formats for endianness: codecs don't actually see
3373 * the endianness of the data but we're using the CPU format
3374 * definitions which do need to include endianness so we ensure that
3375 * codec DAIs always have both big and little endian variants set.
3377 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
3381 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
3382 if (stream->formats & endianness_format_map[i])
3383 stream->formats |= endianness_format_map[i];
3386 int snd_soc_add_component(struct device *dev,
3387 struct snd_soc_component *component,
3388 const struct snd_soc_component_driver *component_driver,
3389 struct snd_soc_dai_driver *dai_drv,
3395 ret = snd_soc_component_initialize(component, component_driver, dev);
3399 component->ignore_pmdown_time = true;
3400 component->registered_as_component = true;
3402 if (component_driver->endianness) {
3403 for (i = 0; i < num_dai; i++) {
3404 convert_endianness_formats(&dai_drv[i].playback);
3405 convert_endianness_formats(&dai_drv[i].capture);
3409 ret = snd_soc_register_dais(component, dai_drv, num_dai,
3410 !component_driver->non_legacy_dai_naming);
3412 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3416 snd_soc_component_add(component);
3421 snd_soc_component_cleanup(component);
3425 EXPORT_SYMBOL_GPL(snd_soc_add_component);
3427 int snd_soc_register_component(struct device *dev,
3428 const struct snd_soc_component_driver *component_driver,
3429 struct snd_soc_dai_driver *dai_drv,
3432 struct snd_soc_component *component;
3434 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
3438 return snd_soc_add_component(dev, component, component_driver,
3441 EXPORT_SYMBOL_GPL(snd_soc_register_component);
3444 * snd_soc_unregister_component - Unregister all related component
3445 * from the ASoC core
3447 * @dev: The device to unregister
3449 static int __snd_soc_unregister_component(struct device *dev)
3451 struct snd_soc_component *component;
3454 mutex_lock(&client_mutex);
3455 list_for_each_entry(component, &component_list, list) {
3456 if (dev != component->dev ||
3457 !component->registered_as_component)
3460 snd_soc_tplg_component_remove(component, SND_SOC_TPLG_INDEX_ALL);
3461 snd_soc_component_del_unlocked(component);
3465 mutex_unlock(&client_mutex);
3468 snd_soc_component_cleanup(component);
3474 void snd_soc_unregister_component(struct device *dev)
3476 while (__snd_soc_unregister_component(dev));
3478 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
3480 struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
3481 const char *driver_name)
3483 struct snd_soc_component *component;
3484 struct snd_soc_component *ret;
3487 mutex_lock(&client_mutex);
3488 list_for_each_entry(component, &component_list, list) {
3489 if (dev != component->dev)
3493 (driver_name != component->driver->name) &&
3494 (strcmp(component->driver->name, driver_name) != 0))
3500 mutex_unlock(&client_mutex);
3504 EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
3506 static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
3508 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3510 return platform->driver->probe(platform);
3513 static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
3515 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3517 platform->driver->remove(platform);
3520 static int snd_soc_platform_drv_pcm_new(struct snd_soc_component *component,
3521 struct snd_soc_pcm_runtime *rtd)
3523 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3525 if (platform->driver->pcm_new)
3526 return platform->driver->pcm_new(rtd);
3531 static void snd_soc_platform_drv_pcm_free(struct snd_soc_component *component,
3532 struct snd_pcm *pcm)
3534 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3536 if (platform->driver->pcm_free)
3537 platform->driver->pcm_free(pcm);
3541 * snd_soc_add_platform - Add a platform to the ASoC core
3542 * @dev: The parent device for the platform
3543 * @platform: The platform to add
3544 * @platform_drv: The driver for the platform
3546 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
3547 const struct snd_soc_platform_driver *platform_drv)
3551 ret = snd_soc_component_initialize(&platform->component,
3552 &platform_drv->component_driver, dev);
3556 platform->dev = dev;
3557 platform->driver = platform_drv;
3559 if (platform_drv->probe)
3560 platform->component.probe = snd_soc_platform_drv_probe;
3561 if (platform_drv->remove)
3562 platform->component.remove = snd_soc_platform_drv_remove;
3563 if (platform_drv->pcm_new)
3564 platform->component.pcm_new = snd_soc_platform_drv_pcm_new;
3565 if (platform_drv->pcm_free)
3566 platform->component.pcm_free = snd_soc_platform_drv_pcm_free;
3568 #ifdef CONFIG_DEBUG_FS
3569 platform->component.debugfs_prefix = "platform";
3572 mutex_lock(&client_mutex);
3573 snd_soc_component_add_unlocked(&platform->component);
3574 list_add(&platform->list, &platform_list);
3575 mutex_unlock(&client_mutex);
3577 dev_dbg(dev, "ASoC: Registered platform '%s'\n",
3578 platform->component.name);
3582 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
3585 * snd_soc_register_platform - Register a platform with the ASoC core
3587 * @dev: The device for the platform
3588 * @platform_drv: The driver for the platform
3590 int snd_soc_register_platform(struct device *dev,
3591 const struct snd_soc_platform_driver *platform_drv)
3593 struct snd_soc_platform *platform;
3596 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
3598 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
3599 if (platform == NULL)
3602 ret = snd_soc_add_platform(dev, platform, platform_drv);
3608 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
3611 * snd_soc_remove_platform - Remove a platform from the ASoC core
3612 * @platform: the platform to remove
3614 void snd_soc_remove_platform(struct snd_soc_platform *platform)
3617 mutex_lock(&client_mutex);
3618 list_del(&platform->list);
3619 snd_soc_component_del_unlocked(&platform->component);
3620 mutex_unlock(&client_mutex);
3622 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
3623 platform->component.name);
3625 snd_soc_component_cleanup(&platform->component);
3627 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
3629 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
3631 struct snd_soc_platform *platform;
3633 mutex_lock(&client_mutex);
3634 list_for_each_entry(platform, &platform_list, list) {
3635 if (dev == platform->dev) {
3636 mutex_unlock(&client_mutex);
3640 mutex_unlock(&client_mutex);
3644 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
3647 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
3649 * @dev: platform to unregister
3651 void snd_soc_unregister_platform(struct device *dev)
3653 struct snd_soc_platform *platform;
3655 platform = snd_soc_lookup_platform(dev);
3659 snd_soc_remove_platform(platform);
3662 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
3664 static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
3666 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3668 return codec->driver->probe(codec);
3671 static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
3673 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3675 codec->driver->remove(codec);
3678 static int snd_soc_codec_drv_suspend(struct snd_soc_component *component)
3680 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3682 return codec->driver->suspend(codec);
3685 static int snd_soc_codec_drv_resume(struct snd_soc_component *component)
3687 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3689 return codec->driver->resume(codec);
3692 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
3693 unsigned int reg, unsigned int val)
3695 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3697 return codec->driver->write(codec, reg, val);
3700 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
3701 unsigned int reg, unsigned int *val)
3703 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3705 *val = codec->driver->read(codec, reg);
3710 static int snd_soc_codec_set_sysclk_(struct snd_soc_component *component,
3711 int clk_id, int source, unsigned int freq, int dir)
3713 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3715 return snd_soc_codec_set_sysclk(codec, clk_id, source, freq, dir);
3718 static int snd_soc_codec_set_pll_(struct snd_soc_component *component,
3719 int pll_id, int source, unsigned int freq_in,
3720 unsigned int freq_out)
3722 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3724 return snd_soc_codec_set_pll(codec, pll_id, source, freq_in, freq_out);
3727 static int snd_soc_codec_set_jack_(struct snd_soc_component *component,
3728 struct snd_soc_jack *jack, void *data)
3730 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3732 return snd_soc_codec_set_jack(codec, jack, data);
3735 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
3736 enum snd_soc_bias_level level)
3738 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
3740 return codec->driver->set_bias_level(codec, level);
3744 * snd_soc_register_codec - Register a codec with the ASoC core
3746 * @dev: The parent device for this codec
3747 * @codec_drv: Codec driver
3748 * @dai_drv: The associated DAI driver
3749 * @num_dai: Number of DAIs
3751 int snd_soc_register_codec(struct device *dev,
3752 const struct snd_soc_codec_driver *codec_drv,
3753 struct snd_soc_dai_driver *dai_drv,
3756 struct snd_soc_dapm_context *dapm;
3757 struct snd_soc_codec *codec;
3758 struct snd_soc_dai *dai;
3761 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3763 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3767 codec->component.codec = codec;
3769 ret = snd_soc_component_initialize(&codec->component,
3770 &codec_drv->component_driver, dev);
3774 if (codec_drv->probe)
3775 codec->component.probe = snd_soc_codec_drv_probe;
3776 if (codec_drv->remove)
3777 codec->component.remove = snd_soc_codec_drv_remove;
3778 if (codec_drv->suspend)
3779 codec->component.suspend = snd_soc_codec_drv_suspend;
3780 if (codec_drv->resume)
3781 codec->component.resume = snd_soc_codec_drv_resume;
3782 if (codec_drv->write)
3783 codec->component.write = snd_soc_codec_drv_write;
3784 if (codec_drv->read)
3785 codec->component.read = snd_soc_codec_drv_read;
3786 if (codec_drv->set_sysclk)
3787 codec->component.set_sysclk = snd_soc_codec_set_sysclk_;
3788 if (codec_drv->set_pll)
3789 codec->component.set_pll = snd_soc_codec_set_pll_;
3790 if (codec_drv->set_jack)
3791 codec->component.set_jack = snd_soc_codec_set_jack_;
3792 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3794 dapm = snd_soc_codec_get_dapm(codec);
3795 dapm->idle_bias_off = codec_drv->idle_bias_off;
3796 dapm->suspend_bias_off = codec_drv->suspend_bias_off;
3797 if (codec_drv->seq_notifier)
3798 dapm->seq_notifier = codec_drv->seq_notifier;
3799 if (codec_drv->set_bias_level)
3800 dapm->set_bias_level = snd_soc_codec_set_bias_level;
3802 codec->driver = codec_drv;
3803 codec->component.val_bytes = codec_drv->reg_word_size;
3805 #ifdef CONFIG_DEBUG_FS
3806 codec->component.init_debugfs = soc_init_codec_debugfs;
3807 codec->component.debugfs_prefix = "codec";
3810 if (codec_drv->get_regmap)
3811 codec->component.regmap = codec_drv->get_regmap(dev);
3813 for (i = 0; i < num_dai; i++) {
3814 convert_endianness_formats(&dai_drv[i].playback);
3815 convert_endianness_formats(&dai_drv[i].capture);
3818 ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3820 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3824 list_for_each_entry(dai, &codec->component.dai_list, list)
3827 mutex_lock(&client_mutex);
3828 snd_soc_component_add_unlocked(&codec->component);
3829 list_add(&codec->list, &codec_list);
3830 mutex_unlock(&client_mutex);
3832 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3833 codec->component.name);
3837 snd_soc_component_cleanup(&codec->component);
3842 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3845 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3847 * @dev: codec to unregister
3849 void snd_soc_unregister_codec(struct device *dev)
3851 struct snd_soc_codec *codec;
3853 mutex_lock(&client_mutex);
3854 list_for_each_entry(codec, &codec_list, list) {
3855 if (dev == codec->dev)
3858 mutex_unlock(&client_mutex);
3862 list_del(&codec->list);
3863 snd_soc_component_del_unlocked(&codec->component);
3864 mutex_unlock(&client_mutex);
3866 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3867 codec->component.name);
3869 snd_soc_component_cleanup(&codec->component);
3870 snd_soc_cache_exit(codec);
3873 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3875 /* Retrieve a card's name from device tree */
3876 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3877 const char *propname)
3879 struct device_node *np;
3883 pr_err("card->dev is not set before calling %s\n", __func__);
3887 np = card->dev->of_node;
3889 ret = of_property_read_string_index(np, propname, 0, &card->name);
3891 * EINVAL means the property does not exist. This is fine providing
3892 * card->name was previously set, which is checked later in
3893 * snd_soc_register_card.
3895 if (ret < 0 && ret != -EINVAL) {
3897 "ASoC: Property '%s' could not be read: %d\n",
3904 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3906 static const struct snd_soc_dapm_widget simple_widgets[] = {
3907 SND_SOC_DAPM_MIC("Microphone", NULL),
3908 SND_SOC_DAPM_LINE("Line", NULL),
3909 SND_SOC_DAPM_HP("Headphone", NULL),
3910 SND_SOC_DAPM_SPK("Speaker", NULL),
3913 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3914 const char *propname)
3916 struct device_node *np = card->dev->of_node;
3917 struct snd_soc_dapm_widget *widgets;
3918 const char *template, *wname;
3919 int i, j, num_widgets, ret;
3921 num_widgets = of_property_count_strings(np, propname);
3922 if (num_widgets < 0) {
3924 "ASoC: Property '%s' does not exist\n", propname);
3927 if (num_widgets & 1) {
3929 "ASoC: Property '%s' length is not even\n", propname);
3935 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3940 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3944 "ASoC: Could not allocate memory for widgets\n");
3948 for (i = 0; i < num_widgets; i++) {
3949 ret = of_property_read_string_index(np, propname,
3953 "ASoC: Property '%s' index %d read error:%d\n",
3954 propname, 2 * i, ret);
3958 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3959 if (!strncmp(template, simple_widgets[j].name,
3960 strlen(simple_widgets[j].name))) {
3961 widgets[i] = simple_widgets[j];
3966 if (j >= ARRAY_SIZE(simple_widgets)) {
3968 "ASoC: DAPM widget '%s' is not supported\n",
3973 ret = of_property_read_string_index(np, propname,
3978 "ASoC: Property '%s' index %d read error:%d\n",
3979 propname, (2 * i) + 1, ret);
3983 widgets[i].name = wname;
3986 card->of_dapm_widgets = widgets;
3987 card->num_of_dapm_widgets = num_widgets;
3991 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3993 static int snd_soc_of_get_slot_mask(struct device_node *np,
3994 const char *prop_name,
3998 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
4004 for (i = 0; i < val; i++)
4005 if (be32_to_cpup(&of_slot_mask[i]))
4011 int snd_soc_of_parse_tdm_slot(struct device_node *np,
4012 unsigned int *tx_mask,
4013 unsigned int *rx_mask,
4014 unsigned int *slots,
4015 unsigned int *slot_width)
4021 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
4023 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
4025 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
4026 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
4034 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
4035 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
4045 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
4047 void snd_soc_of_parse_audio_prefix(struct snd_soc_card *card,
4048 struct snd_soc_codec_conf *codec_conf,
4049 struct device_node *of_node,
4050 const char *propname)
4052 struct device_node *np = card->dev->of_node;
4056 ret = of_property_read_string(np, propname, &str);
4058 /* no prefix is not error */
4062 codec_conf->of_node = of_node;
4063 codec_conf->name_prefix = str;
4065 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_prefix);
4067 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
4068 const char *propname)
4070 struct device_node *np = card->dev->of_node;
4072 struct snd_soc_dapm_route *routes;
4075 num_routes = of_property_count_strings(np, propname);
4076 if (num_routes < 0 || num_routes & 1) {
4078 "ASoC: Property '%s' does not exist or its length is not even\n",
4084 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
4089 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
4093 "ASoC: Could not allocate DAPM route table\n");
4097 for (i = 0; i < num_routes; i++) {
4098 ret = of_property_read_string_index(np, propname,
4099 2 * i, &routes[i].sink);
4102 "ASoC: Property '%s' index %d could not be read: %d\n",
4103 propname, 2 * i, ret);
4106 ret = of_property_read_string_index(np, propname,
4107 (2 * i) + 1, &routes[i].source);
4110 "ASoC: Property '%s' index %d could not be read: %d\n",
4111 propname, (2 * i) + 1, ret);
4116 card->num_of_dapm_routes = num_routes;
4117 card->of_dapm_routes = routes;
4121 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
4123 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
4125 struct device_node **bitclkmaster,
4126 struct device_node **framemaster)
4130 unsigned int format = 0;
4136 } of_fmt_table[] = {
4137 { "i2s", SND_SOC_DAIFMT_I2S },
4138 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
4139 { "left_j", SND_SOC_DAIFMT_LEFT_J },
4140 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
4141 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
4142 { "ac97", SND_SOC_DAIFMT_AC97 },
4143 { "pdm", SND_SOC_DAIFMT_PDM},
4144 { "msb", SND_SOC_DAIFMT_MSB },
4145 { "lsb", SND_SOC_DAIFMT_LSB },
4152 * check "dai-format = xxx"
4153 * or "[prefix]format = xxx"
4154 * SND_SOC_DAIFMT_FORMAT_MASK area
4156 ret = of_property_read_string(np, "dai-format", &str);
4158 snprintf(prop, sizeof(prop), "%sformat", prefix);
4159 ret = of_property_read_string(np, prop, &str);
4162 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
4163 if (strcmp(str, of_fmt_table[i].name) == 0) {
4164 format |= of_fmt_table[i].val;
4171 * check "[prefix]continuous-clock"
4172 * SND_SOC_DAIFMT_CLOCK_MASK area
4174 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
4175 if (of_property_read_bool(np, prop))
4176 format |= SND_SOC_DAIFMT_CONT;
4178 format |= SND_SOC_DAIFMT_GATED;
4181 * check "[prefix]bitclock-inversion"
4182 * check "[prefix]frame-inversion"
4183 * SND_SOC_DAIFMT_INV_MASK area
4185 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
4186 bit = !!of_get_property(np, prop, NULL);
4188 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
4189 frame = !!of_get_property(np, prop, NULL);
4191 switch ((bit << 4) + frame) {
4193 format |= SND_SOC_DAIFMT_IB_IF;
4196 format |= SND_SOC_DAIFMT_IB_NF;
4199 format |= SND_SOC_DAIFMT_NB_IF;
4202 /* SND_SOC_DAIFMT_NB_NF is default */
4207 * check "[prefix]bitclock-master"
4208 * check "[prefix]frame-master"
4209 * SND_SOC_DAIFMT_MASTER_MASK area
4211 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
4212 bit = !!of_get_property(np, prop, NULL);
4213 if (bit && bitclkmaster)
4214 *bitclkmaster = of_parse_phandle(np, prop, 0);
4216 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
4217 frame = !!of_get_property(np, prop, NULL);
4218 if (frame && framemaster)
4219 *framemaster = of_parse_phandle(np, prop, 0);
4221 switch ((bit << 4) + frame) {
4223 format |= SND_SOC_DAIFMT_CBM_CFM;
4226 format |= SND_SOC_DAIFMT_CBM_CFS;
4229 format |= SND_SOC_DAIFMT_CBS_CFM;
4232 format |= SND_SOC_DAIFMT_CBS_CFS;
4238 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
4240 int snd_soc_get_dai_id(struct device_node *ep)
4242 struct snd_soc_component *pos;
4243 struct device_node *node;
4246 node = of_graph_get_port_parent(ep);
4249 * For example HDMI case, HDMI has video/sound port,
4250 * but ALSA SoC needs sound port number only.
4251 * Thus counting HDMI DT port/endpoint doesn't work.
4252 * Then, it should have .of_xlate_dai_id
4255 mutex_lock(&client_mutex);
4256 list_for_each_entry(pos, &component_list, list) {
4257 struct device_node *component_of_node = pos->dev->of_node;
4259 if (!component_of_node && pos->dev->parent)
4260 component_of_node = pos->dev->parent->of_node;
4262 if (component_of_node != node)
4265 if (pos->driver->of_xlate_dai_id)
4266 ret = pos->driver->of_xlate_dai_id(pos, ep);
4270 mutex_unlock(&client_mutex);
4276 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
4278 int snd_soc_get_dai_name(struct of_phandle_args *args,
4279 const char **dai_name)
4281 struct snd_soc_component *pos;
4282 struct device_node *component_of_node;
4283 int ret = -EPROBE_DEFER;
4285 mutex_lock(&client_mutex);
4286 list_for_each_entry(pos, &component_list, list) {
4287 component_of_node = pos->dev->of_node;
4288 if (!component_of_node && pos->dev->parent)
4289 component_of_node = pos->dev->parent->of_node;
4291 if (component_of_node != args->np)
4294 if (pos->driver->of_xlate_dai_name) {
4295 ret = pos->driver->of_xlate_dai_name(pos,
4299 struct snd_soc_dai *dai;
4302 switch (args->args_count) {
4304 id = 0; /* same as dai_drv[0] */
4314 if (id < 0 || id >= pos->num_dai) {
4321 /* find target DAI */
4322 list_for_each_entry(dai, &pos->dai_list, list) {
4328 *dai_name = dai->driver->name;
4330 *dai_name = pos->name;
4335 mutex_unlock(&client_mutex);
4338 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
4340 int snd_soc_of_get_dai_name(struct device_node *of_node,
4341 const char **dai_name)
4343 struct of_phandle_args args;
4346 ret = of_parse_phandle_with_args(of_node, "sound-dai",
4347 "#sound-dai-cells", 0, &args);
4351 ret = snd_soc_get_dai_name(&args, dai_name);
4353 of_node_put(args.np);
4357 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
4360 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
4361 * @dai_link: DAI link
4363 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
4365 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
4367 struct snd_soc_dai_link_component *component = dai_link->codecs;
4370 for (index = 0; index < dai_link->num_codecs; index++, component++) {
4371 if (!component->of_node)
4373 of_node_put(component->of_node);
4374 component->of_node = NULL;
4377 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
4380 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
4382 * @of_node: Device node
4383 * @dai_link: DAI link
4385 * Builds an array of CODEC DAI components from the DAI link property
4387 * The array is set in the DAI link and the number of DAIs is set accordingly.
4388 * The device nodes in the array (of_node) must be dereferenced by calling
4389 * snd_soc_of_put_dai_link_codecs() on @dai_link.
4391 * Returns 0 for success
4393 int snd_soc_of_get_dai_link_codecs(struct device *dev,
4394 struct device_node *of_node,
4395 struct snd_soc_dai_link *dai_link)
4397 struct of_phandle_args args;
4398 struct snd_soc_dai_link_component *component;
4400 int index, num_codecs, ret;
4402 /* Count the number of CODECs */
4404 num_codecs = of_count_phandle_with_args(of_node, name,
4405 "#sound-dai-cells");
4406 if (num_codecs <= 0) {
4407 if (num_codecs == -ENOENT)
4408 dev_err(dev, "No 'sound-dai' property\n");
4410 dev_err(dev, "Bad phandle in 'sound-dai'\n");
4413 component = devm_kzalloc(dev,
4414 sizeof *component * num_codecs,
4418 dai_link->codecs = component;
4419 dai_link->num_codecs = num_codecs;
4421 /* Parse the list */
4422 for (index = 0, component = dai_link->codecs;
4423 index < dai_link->num_codecs;
4424 index++, component++) {
4425 ret = of_parse_phandle_with_args(of_node, name,
4430 component->of_node = args.np;
4431 ret = snd_soc_get_dai_name(&args, &component->dai_name);
4437 snd_soc_of_put_dai_link_codecs(dai_link);
4438 dai_link->codecs = NULL;
4439 dai_link->num_codecs = 0;
4442 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
4444 static int __init snd_soc_init(void)
4446 snd_soc_debugfs_init();
4447 snd_soc_util_init();
4449 return platform_driver_register(&soc_driver);
4451 module_init(snd_soc_init);
4453 static void __exit snd_soc_exit(void)
4455 snd_soc_util_exit();
4456 snd_soc_debugfs_exit();
4458 platform_driver_unregister(&soc_driver);
4460 module_exit(snd_soc_exit);
4462 /* Module information */
4464 MODULE_DESCRIPTION("ALSA SoC Core");
4465 MODULE_LICENSE("GPL");
4466 MODULE_ALIAS("platform:soc-audio");