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.
9 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 * with code, comments and ideas from :-
11 * Richard Purdie <richard@openedhand.com>
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(codec_reg, 0444, codec_reg_show, NULL);
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->codec ? 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_roup = {
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 ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
353 size_t count, loff_t *ppos)
355 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
356 ssize_t len, ret = 0;
357 struct snd_soc_codec *codec;
362 mutex_lock(&client_mutex);
364 list_for_each_entry(codec, &codec_list, list) {
365 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
366 codec->component.name);
369 if (ret > PAGE_SIZE) {
375 mutex_unlock(&client_mutex);
378 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
385 static const struct file_operations codec_list_fops = {
386 .read = codec_list_read_file,
387 .llseek = default_llseek,/* read accesses f_pos */
390 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
391 size_t count, loff_t *ppos)
393 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
394 ssize_t len, ret = 0;
395 struct snd_soc_component *component;
396 struct snd_soc_dai *dai;
401 mutex_lock(&client_mutex);
403 list_for_each_entry(component, &component_list, list) {
404 list_for_each_entry(dai, &component->dai_list, list) {
405 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
409 if (ret > PAGE_SIZE) {
416 mutex_unlock(&client_mutex);
418 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
425 static const struct file_operations dai_list_fops = {
426 .read = dai_list_read_file,
427 .llseek = default_llseek,/* read accesses f_pos */
430 static ssize_t platform_list_read_file(struct file *file,
431 char __user *user_buf,
432 size_t count, loff_t *ppos)
434 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
435 ssize_t len, ret = 0;
436 struct snd_soc_platform *platform;
441 mutex_lock(&client_mutex);
443 list_for_each_entry(platform, &platform_list, list) {
444 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
445 platform->component.name);
448 if (ret > PAGE_SIZE) {
454 mutex_unlock(&client_mutex);
456 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
463 static const struct file_operations platform_list_fops = {
464 .read = platform_list_read_file,
465 .llseek = default_llseek,/* read accesses f_pos */
468 static void soc_init_card_debugfs(struct snd_soc_card *card)
470 if (!snd_soc_debugfs_root)
473 card->debugfs_card_root = debugfs_create_dir(card->name,
474 snd_soc_debugfs_root);
475 if (!card->debugfs_card_root) {
477 "ASoC: Failed to create card debugfs directory\n");
481 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
482 card->debugfs_card_root,
484 if (!card->debugfs_pop_time)
486 "ASoC: Failed to create pop time debugfs file\n");
489 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
491 debugfs_remove_recursive(card->debugfs_card_root);
495 static void snd_soc_debugfs_init(void)
497 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
498 if (IS_ERR_OR_NULL(snd_soc_debugfs_root)) {
499 pr_warn("ASoC: Failed to create debugfs directory\n");
500 snd_soc_debugfs_root = NULL;
504 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
506 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
508 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
510 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
512 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
513 &platform_list_fops))
514 pr_warn("ASoC: Failed to create platform list debugfs file\n");
517 static void snd_soc_debugfs_exit(void)
519 debugfs_remove_recursive(snd_soc_debugfs_root);
524 #define soc_init_codec_debugfs NULL
526 static inline void soc_init_component_debugfs(
527 struct snd_soc_component *component)
531 static inline void soc_cleanup_component_debugfs(
532 struct snd_soc_component *component)
536 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
540 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
544 static inline void snd_soc_debugfs_init(void)
548 static inline void snd_soc_debugfs_exit(void)
554 static int snd_soc_rtdcom_add(struct snd_soc_pcm_runtime *rtd,
555 struct snd_soc_component *component)
557 struct snd_soc_rtdcom_list *rtdcom;
558 struct snd_soc_rtdcom_list *new_rtdcom;
560 for_each_rtdcom(rtd, rtdcom) {
561 /* already connected */
562 if (rtdcom->component == component)
566 new_rtdcom = kmalloc(sizeof(*new_rtdcom), GFP_KERNEL);
570 new_rtdcom->component = component;
571 INIT_LIST_HEAD(&new_rtdcom->list);
573 list_add_tail(&new_rtdcom->list, &rtd->component_list);
578 static void snd_soc_rtdcom_del_all(struct snd_soc_pcm_runtime *rtd)
580 struct snd_soc_rtdcom_list *rtdcom1, *rtdcom2;
582 for_each_rtdcom_safe(rtd, rtdcom1, rtdcom2)
585 INIT_LIST_HEAD(&rtd->component_list);
588 struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
589 const char *driver_name)
591 struct snd_soc_rtdcom_list *rtdcom;
593 for_each_rtdcom(rtd, rtdcom) {
594 if ((rtdcom->component->driver->name == driver_name) ||
595 strcmp(rtdcom->component->driver->name, driver_name) == 0)
596 return rtdcom->component;
602 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
603 const char *dai_link, int stream)
605 struct snd_soc_pcm_runtime *rtd;
607 list_for_each_entry(rtd, &card->rtd_list, list) {
608 if (rtd->dai_link->no_pcm &&
609 !strcmp(rtd->dai_link->name, dai_link))
610 return rtd->pcm->streams[stream].substream;
612 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
615 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
617 static const struct snd_soc_ops null_snd_soc_ops;
619 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
620 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
622 struct snd_soc_pcm_runtime *rtd;
624 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
628 INIT_LIST_HEAD(&rtd->component_list);
630 rtd->dai_link = dai_link;
631 if (!rtd->dai_link->ops)
632 rtd->dai_link->ops = &null_snd_soc_ops;
634 rtd->codec_dais = kzalloc(sizeof(struct snd_soc_dai *) *
635 dai_link->num_codecs,
637 if (!rtd->codec_dais) {
645 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
647 kfree(rtd->codec_dais);
648 snd_soc_rtdcom_del_all(rtd);
652 static void soc_add_pcm_runtime(struct snd_soc_card *card,
653 struct snd_soc_pcm_runtime *rtd)
655 list_add_tail(&rtd->list, &card->rtd_list);
656 rtd->num = card->num_rtd;
660 static void soc_remove_pcm_runtimes(struct snd_soc_card *card)
662 struct snd_soc_pcm_runtime *rtd, *_rtd;
664 list_for_each_entry_safe(rtd, _rtd, &card->rtd_list, list) {
665 list_del(&rtd->list);
666 soc_free_pcm_runtime(rtd);
672 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
673 const char *dai_link)
675 struct snd_soc_pcm_runtime *rtd;
677 list_for_each_entry(rtd, &card->rtd_list, list) {
678 if (!strcmp(rtd->dai_link->name, dai_link))
681 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
684 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
686 static void codec2codec_close_delayed_work(struct work_struct *work)
688 /* Currently nothing to do for c2c links
689 * Since c2c links are internal nodes in the DAPM graph and
690 * don't interface with the outside world or application layer
691 * we don't have to do any special handling on close.
695 #ifdef CONFIG_PM_SLEEP
696 /* powers down audio subsystem for suspend */
697 int snd_soc_suspend(struct device *dev)
699 struct snd_soc_card *card = dev_get_drvdata(dev);
700 struct snd_soc_component *component;
701 struct snd_soc_pcm_runtime *rtd;
704 /* If the card is not initialized yet there is nothing to do */
705 if (!card->instantiated)
708 /* Due to the resume being scheduled into a workqueue we could
709 * suspend before that's finished - wait for it to complete.
711 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
713 /* we're going to block userspace touching us until resume completes */
714 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
716 /* mute any active DACs */
717 list_for_each_entry(rtd, &card->rtd_list, list) {
719 if (rtd->dai_link->ignore_suspend)
722 for (i = 0; i < rtd->num_codecs; i++) {
723 struct snd_soc_dai *dai = rtd->codec_dais[i];
724 struct snd_soc_dai_driver *drv = dai->driver;
726 if (drv->ops->digital_mute && dai->playback_active)
727 drv->ops->digital_mute(dai, 1);
731 /* suspend all pcms */
732 list_for_each_entry(rtd, &card->rtd_list, list) {
733 if (rtd->dai_link->ignore_suspend)
736 snd_pcm_suspend_all(rtd->pcm);
739 if (card->suspend_pre)
740 card->suspend_pre(card);
742 list_for_each_entry(rtd, &card->rtd_list, list) {
743 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
745 if (rtd->dai_link->ignore_suspend)
748 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
749 cpu_dai->driver->suspend(cpu_dai);
752 /* close any waiting streams */
753 list_for_each_entry(rtd, &card->rtd_list, list)
754 flush_delayed_work(&rtd->delayed_work);
756 list_for_each_entry(rtd, &card->rtd_list, list) {
758 if (rtd->dai_link->ignore_suspend)
761 snd_soc_dapm_stream_event(rtd,
762 SNDRV_PCM_STREAM_PLAYBACK,
763 SND_SOC_DAPM_STREAM_SUSPEND);
765 snd_soc_dapm_stream_event(rtd,
766 SNDRV_PCM_STREAM_CAPTURE,
767 SND_SOC_DAPM_STREAM_SUSPEND);
770 /* Recheck all endpoints too, their state is affected by suspend */
771 dapm_mark_endpoints_dirty(card);
772 snd_soc_dapm_sync(&card->dapm);
774 /* suspend all COMPONENTs */
775 list_for_each_entry(component, &card->component_dev_list, card_list) {
776 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
778 /* If there are paths active then the COMPONENT will be held with
779 * bias _ON and should not be suspended. */
780 if (!component->suspended) {
781 switch (snd_soc_dapm_get_bias_level(dapm)) {
782 case SND_SOC_BIAS_STANDBY:
784 * If the COMPONENT is capable of idle
785 * bias off then being in STANDBY
786 * means it's doing something,
787 * otherwise fall through.
789 if (dapm->idle_bias_off) {
790 dev_dbg(component->dev,
791 "ASoC: idle_bias_off CODEC on over suspend\n");
795 case SND_SOC_BIAS_OFF:
796 if (component->suspend)
797 component->suspend(component);
798 component->suspended = 1;
799 if (component->regmap)
800 regcache_mark_dirty(component->regmap);
801 /* deactivate pins to sleep state */
802 pinctrl_pm_select_sleep_state(component->dev);
805 dev_dbg(component->dev,
806 "ASoC: COMPONENT is on over suspend\n");
812 list_for_each_entry(rtd, &card->rtd_list, list) {
813 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
815 if (rtd->dai_link->ignore_suspend)
818 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
819 cpu_dai->driver->suspend(cpu_dai);
821 /* deactivate pins to sleep state */
822 pinctrl_pm_select_sleep_state(cpu_dai->dev);
825 if (card->suspend_post)
826 card->suspend_post(card);
830 EXPORT_SYMBOL_GPL(snd_soc_suspend);
832 /* deferred resume work, so resume can complete before we finished
833 * setting our codec back up, which can be very slow on I2C
835 static void soc_resume_deferred(struct work_struct *work)
837 struct snd_soc_card *card =
838 container_of(work, struct snd_soc_card, deferred_resume_work);
839 struct snd_soc_pcm_runtime *rtd;
840 struct snd_soc_component *component;
843 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
844 * so userspace apps are blocked from touching us
847 dev_dbg(card->dev, "ASoC: starting resume work\n");
849 /* Bring us up into D2 so that DAPM starts enabling things */
850 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
852 if (card->resume_pre)
853 card->resume_pre(card);
855 /* resume control bus DAIs */
856 list_for_each_entry(rtd, &card->rtd_list, list) {
857 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
859 if (rtd->dai_link->ignore_suspend)
862 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
863 cpu_dai->driver->resume(cpu_dai);
866 list_for_each_entry(component, &card->component_dev_list, card_list) {
867 if (component->suspended) {
868 if (component->resume)
869 component->resume(component);
870 component->suspended = 0;
874 list_for_each_entry(rtd, &card->rtd_list, list) {
876 if (rtd->dai_link->ignore_suspend)
879 snd_soc_dapm_stream_event(rtd,
880 SNDRV_PCM_STREAM_PLAYBACK,
881 SND_SOC_DAPM_STREAM_RESUME);
883 snd_soc_dapm_stream_event(rtd,
884 SNDRV_PCM_STREAM_CAPTURE,
885 SND_SOC_DAPM_STREAM_RESUME);
888 /* unmute any active DACs */
889 list_for_each_entry(rtd, &card->rtd_list, list) {
891 if (rtd->dai_link->ignore_suspend)
894 for (i = 0; i < rtd->num_codecs; i++) {
895 struct snd_soc_dai *dai = rtd->codec_dais[i];
896 struct snd_soc_dai_driver *drv = dai->driver;
898 if (drv->ops->digital_mute && dai->playback_active)
899 drv->ops->digital_mute(dai, 0);
903 list_for_each_entry(rtd, &card->rtd_list, list) {
904 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
906 if (rtd->dai_link->ignore_suspend)
909 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
910 cpu_dai->driver->resume(cpu_dai);
913 if (card->resume_post)
914 card->resume_post(card);
916 dev_dbg(card->dev, "ASoC: resume work completed\n");
918 /* Recheck all endpoints too, their state is affected by suspend */
919 dapm_mark_endpoints_dirty(card);
920 snd_soc_dapm_sync(&card->dapm);
922 /* userspace can access us now we are back as we were before */
923 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
926 /* powers up audio subsystem after a suspend */
927 int snd_soc_resume(struct device *dev)
929 struct snd_soc_card *card = dev_get_drvdata(dev);
930 bool bus_control = false;
931 struct snd_soc_pcm_runtime *rtd;
933 /* If the card is not initialized yet there is nothing to do */
934 if (!card->instantiated)
937 /* activate pins from sleep state */
938 list_for_each_entry(rtd, &card->rtd_list, list) {
939 struct snd_soc_dai **codec_dais = rtd->codec_dais;
940 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
944 pinctrl_pm_select_default_state(cpu_dai->dev);
946 for (j = 0; j < rtd->num_codecs; j++) {
947 struct snd_soc_dai *codec_dai = codec_dais[j];
948 if (codec_dai->active)
949 pinctrl_pm_select_default_state(codec_dai->dev);
954 * DAIs that also act as the control bus master might have other drivers
955 * hanging off them so need to resume immediately. Other drivers don't
956 * have that problem and may take a substantial amount of time to resume
957 * due to I/O costs and anti-pop so handle them out of line.
959 list_for_each_entry(rtd, &card->rtd_list, list) {
960 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
961 bus_control |= cpu_dai->driver->bus_control;
964 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
965 soc_resume_deferred(&card->deferred_resume_work);
967 dev_dbg(dev, "ASoC: Scheduling resume work\n");
968 if (!schedule_work(&card->deferred_resume_work))
969 dev_err(dev, "ASoC: resume work item may be lost\n");
974 EXPORT_SYMBOL_GPL(snd_soc_resume);
976 #define snd_soc_suspend NULL
977 #define snd_soc_resume NULL
980 static const struct snd_soc_dai_ops null_dai_ops = {
983 static struct snd_soc_component *soc_find_component(
984 const struct device_node *of_node, const char *name)
986 struct snd_soc_component *component;
988 lockdep_assert_held(&client_mutex);
990 list_for_each_entry(component, &component_list, list) {
992 if (component->dev->of_node == of_node)
994 } else if (strcmp(component->name, name) == 0) {
1003 * snd_soc_find_dai - Find a registered DAI
1005 * @dlc: name of the DAI or the DAI driver and optional component info to match
1007 * This function will search all registered components and their DAIs to
1008 * find the DAI of the same name. The component's of_node and name
1009 * should also match if being specified.
1011 * Return: pointer of DAI, or NULL if not found.
1013 struct snd_soc_dai *snd_soc_find_dai(
1014 const struct snd_soc_dai_link_component *dlc)
1016 struct snd_soc_component *component;
1017 struct snd_soc_dai *dai;
1018 struct device_node *component_of_node;
1020 lockdep_assert_held(&client_mutex);
1022 /* Find CPU DAI from registered DAIs*/
1023 list_for_each_entry(component, &component_list, list) {
1024 component_of_node = component->dev->of_node;
1025 if (!component_of_node && component->dev->parent)
1026 component_of_node = component->dev->parent->of_node;
1028 if (dlc->of_node && component_of_node != dlc->of_node)
1030 if (dlc->name && strcmp(component->name, dlc->name))
1032 list_for_each_entry(dai, &component->dai_list, list) {
1033 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
1034 && (!dai->driver->name
1035 || strcmp(dai->driver->name, dlc->dai_name)))
1044 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
1048 * snd_soc_find_dai_link - Find a DAI link
1051 * @id: DAI link ID to match
1052 * @name: DAI link name to match, optional
1053 * @stream_name: DAI link stream name to match, optional
1055 * This function will search all existing DAI links of the soc card to
1056 * find the link of the same ID. Since DAI links may not have their
1057 * unique ID, so name and stream name should also match if being
1060 * Return: pointer of DAI link, or NULL if not found.
1062 struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
1063 int id, const char *name,
1064 const char *stream_name)
1066 struct snd_soc_dai_link *link, *_link;
1068 lockdep_assert_held(&client_mutex);
1070 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1074 if (name && (!link->name || strcmp(name, link->name)))
1077 if (stream_name && (!link->stream_name
1078 || strcmp(stream_name, link->stream_name)))
1086 EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);
1088 static bool soc_is_dai_link_bound(struct snd_soc_card *card,
1089 struct snd_soc_dai_link *dai_link)
1091 struct snd_soc_pcm_runtime *rtd;
1093 list_for_each_entry(rtd, &card->rtd_list, list) {
1094 if (rtd->dai_link == dai_link)
1101 static int soc_bind_dai_link(struct snd_soc_card *card,
1102 struct snd_soc_dai_link *dai_link)
1104 struct snd_soc_pcm_runtime *rtd;
1105 struct snd_soc_dai_link_component *codecs = dai_link->codecs;
1106 struct snd_soc_dai_link_component cpu_dai_component;
1107 struct snd_soc_component *component;
1108 struct snd_soc_dai **codec_dais;
1109 struct snd_soc_platform *platform;
1110 struct device_node *platform_of_node;
1111 const char *platform_name;
1114 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1116 if (soc_is_dai_link_bound(card, dai_link)) {
1117 dev_dbg(card->dev, "ASoC: dai link %s already bound\n",
1122 rtd = soc_new_pcm_runtime(card, dai_link);
1126 cpu_dai_component.name = dai_link->cpu_name;
1127 cpu_dai_component.of_node = dai_link->cpu_of_node;
1128 cpu_dai_component.dai_name = dai_link->cpu_dai_name;
1129 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
1130 if (!rtd->cpu_dai) {
1131 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
1132 dai_link->cpu_dai_name);
1135 snd_soc_rtdcom_add(rtd, rtd->cpu_dai->component);
1137 rtd->num_codecs = dai_link->num_codecs;
1139 /* Find CODEC from registered CODECs */
1140 codec_dais = rtd->codec_dais;
1141 for (i = 0; i < rtd->num_codecs; i++) {
1142 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
1143 if (!codec_dais[i]) {
1144 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
1145 codecs[i].dai_name);
1148 snd_soc_rtdcom_add(rtd, codec_dais[i]->component);
1151 /* Single codec links expect codec and codec_dai in runtime data */
1152 rtd->codec_dai = codec_dais[0];
1153 rtd->codec = rtd->codec_dai->codec;
1155 /* if there's no platform we match on the empty platform */
1156 platform_name = dai_link->platform_name;
1157 if (!platform_name && !dai_link->platform_of_node)
1158 platform_name = "snd-soc-dummy";
1160 /* find one from the set of registered platforms */
1161 list_for_each_entry(component, &component_list, list) {
1162 platform_of_node = component->dev->of_node;
1163 if (!platform_of_node && component->dev->parent->of_node)
1164 platform_of_node = component->dev->parent->of_node;
1166 if (dai_link->platform_of_node) {
1167 if (platform_of_node != dai_link->platform_of_node)
1170 if (strcmp(component->name, platform_name))
1174 snd_soc_rtdcom_add(rtd, component);
1177 /* find one from the set of registered platforms */
1178 list_for_each_entry(platform, &platform_list, list) {
1179 platform_of_node = platform->dev->of_node;
1180 if (!platform_of_node && platform->dev->parent->of_node)
1181 platform_of_node = platform->dev->parent->of_node;
1183 if (dai_link->platform_of_node) {
1184 if (platform_of_node != dai_link->platform_of_node)
1187 if (strcmp(platform->component.name, platform_name))
1191 rtd->platform = platform;
1193 if (!rtd->platform) {
1194 dev_err(card->dev, "ASoC: platform %s not registered\n",
1195 dai_link->platform_name);
1199 soc_add_pcm_runtime(card, rtd);
1203 soc_free_pcm_runtime(rtd);
1204 return -EPROBE_DEFER;
1207 static void soc_remove_component(struct snd_soc_component *component)
1209 if (!component->card)
1212 list_del(&component->card_list);
1214 if (component->remove)
1215 component->remove(component);
1217 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1219 soc_cleanup_component_debugfs(component);
1220 component->card = NULL;
1221 module_put(component->dev->driver->owner);
1224 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1228 if (dai && dai->probed &&
1229 dai->driver->remove_order == order) {
1230 if (dai->driver->remove) {
1231 err = dai->driver->remove(dai);
1234 "ASoC: failed to remove %s: %d\n",
1241 static void soc_remove_link_dais(struct snd_soc_card *card,
1242 struct snd_soc_pcm_runtime *rtd, int order)
1246 /* unregister the rtd device */
1247 if (rtd->dev_registered) {
1248 device_unregister(rtd->dev);
1249 rtd->dev_registered = 0;
1252 /* remove the CODEC DAI */
1253 for (i = 0; i < rtd->num_codecs; i++)
1254 soc_remove_dai(rtd->codec_dais[i], order);
1256 soc_remove_dai(rtd->cpu_dai, order);
1259 static void soc_remove_link_components(struct snd_soc_card *card,
1260 struct snd_soc_pcm_runtime *rtd, int order)
1262 struct snd_soc_component *component;
1263 struct snd_soc_rtdcom_list *rtdcom;
1265 for_each_rtdcom(rtd, rtdcom) {
1266 component = rtdcom->component;
1268 if (component->driver->remove_order == order)
1269 soc_remove_component(component);
1273 static void soc_remove_dai_links(struct snd_soc_card *card)
1276 struct snd_soc_pcm_runtime *rtd;
1277 struct snd_soc_dai_link *link, *_link;
1279 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1281 list_for_each_entry(rtd, &card->rtd_list, list)
1282 soc_remove_link_dais(card, rtd, order);
1285 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1287 list_for_each_entry(rtd, &card->rtd_list, list)
1288 soc_remove_link_components(card, rtd, order);
1291 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1292 if (link->dobj.type == SND_SOC_DOBJ_DAI_LINK)
1293 dev_warn(card->dev, "Topology forgot to remove link %s?\n",
1296 list_del(&link->list);
1297 card->num_dai_links--;
1301 static int snd_soc_init_multicodec(struct snd_soc_card *card,
1302 struct snd_soc_dai_link *dai_link)
1304 /* Legacy codec/codec_dai link is a single entry in multicodec */
1305 if (dai_link->codec_name || dai_link->codec_of_node ||
1306 dai_link->codec_dai_name) {
1307 dai_link->num_codecs = 1;
1309 dai_link->codecs = devm_kzalloc(card->dev,
1310 sizeof(struct snd_soc_dai_link_component),
1312 if (!dai_link->codecs)
1315 dai_link->codecs[0].name = dai_link->codec_name;
1316 dai_link->codecs[0].of_node = dai_link->codec_of_node;
1317 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
1320 if (!dai_link->codecs) {
1321 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
1328 static int soc_init_dai_link(struct snd_soc_card *card,
1329 struct snd_soc_dai_link *link)
1333 ret = snd_soc_init_multicodec(card, link);
1335 dev_err(card->dev, "ASoC: failed to init multicodec\n");
1339 for (i = 0; i < link->num_codecs; i++) {
1341 * Codec must be specified by 1 of name or OF node,
1342 * not both or neither.
1344 if (!!link->codecs[i].name ==
1345 !!link->codecs[i].of_node) {
1346 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
1350 /* Codec DAI name must be specified */
1351 if (!link->codecs[i].dai_name) {
1352 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
1359 * Platform may be specified by either name or OF node, but
1360 * can be left unspecified, and a dummy platform will be used.
1362 if (link->platform_name && link->platform_of_node) {
1364 "ASoC: Both platform name/of_node are set for %s\n",
1370 * CPU device may be specified by either name or OF node, but
1371 * can be left unspecified, and will be matched based on DAI
1374 if (link->cpu_name && link->cpu_of_node) {
1376 "ASoC: Neither/both cpu name/of_node are set for %s\n",
1381 * At least one of CPU DAI name or CPU device name/node must be
1384 if (!link->cpu_dai_name &&
1385 !(link->cpu_name || link->cpu_of_node)) {
1387 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
1396 * snd_soc_add_dai_link - Add a DAI link dynamically
1397 * @card: The ASoC card to which the DAI link is added
1398 * @dai_link: The new DAI link to add
1400 * This function adds a DAI link to the ASoC card's link list.
1402 * Note: Topology can use this API to add DAI links when probing the
1403 * topology component. And machine drivers can still define static
1404 * DAI links in dai_link array.
1406 int snd_soc_add_dai_link(struct snd_soc_card *card,
1407 struct snd_soc_dai_link *dai_link)
1409 if (dai_link->dobj.type
1410 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1411 dev_err(card->dev, "Invalid dai link type %d\n",
1412 dai_link->dobj.type);
1416 lockdep_assert_held(&client_mutex);
1417 /* Notify the machine driver for extra initialization
1418 * on the link created by topology.
1420 if (dai_link->dobj.type && card->add_dai_link)
1421 card->add_dai_link(card, dai_link);
1423 list_add_tail(&dai_link->list, &card->dai_link_list);
1424 card->num_dai_links++;
1428 EXPORT_SYMBOL_GPL(snd_soc_add_dai_link);
1431 * snd_soc_remove_dai_link - Remove a DAI link from the list
1432 * @card: The ASoC card that owns the link
1433 * @dai_link: The DAI link to remove
1435 * This function removes a DAI link from the ASoC card's link list.
1437 * For DAI links previously added by topology, topology should
1438 * remove them by using the dobj embedded in the link.
1440 void snd_soc_remove_dai_link(struct snd_soc_card *card,
1441 struct snd_soc_dai_link *dai_link)
1443 struct snd_soc_dai_link *link, *_link;
1445 if (dai_link->dobj.type
1446 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1447 dev_err(card->dev, "Invalid dai link type %d\n",
1448 dai_link->dobj.type);
1452 lockdep_assert_held(&client_mutex);
1453 /* Notify the machine driver for extra destruction
1454 * on the link created by topology.
1456 if (dai_link->dobj.type && card->remove_dai_link)
1457 card->remove_dai_link(card, dai_link);
1459 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1460 if (link == dai_link) {
1461 list_del(&link->list);
1462 card->num_dai_links--;
1467 EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);
1469 static void soc_set_name_prefix(struct snd_soc_card *card,
1470 struct snd_soc_component *component)
1474 if (card->codec_conf == NULL)
1477 for (i = 0; i < card->num_configs; i++) {
1478 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1479 if (map->of_node && component->dev->of_node != map->of_node)
1481 if (map->dev_name && strcmp(component->name, map->dev_name))
1483 component->name_prefix = map->name_prefix;
1488 static int soc_probe_component(struct snd_soc_card *card,
1489 struct snd_soc_component *component)
1491 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1492 struct snd_soc_dai *dai;
1495 if (!strcmp(component->name, "snd-soc-dummy"))
1498 if (component->card) {
1499 if (component->card != card) {
1500 dev_err(component->dev,
1501 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1502 card->name, component->card->name);
1508 if (!try_module_get(component->dev->driver->owner))
1511 component->card = card;
1513 soc_set_name_prefix(card, component);
1515 soc_init_component_debugfs(component);
1517 if (component->driver->dapm_widgets) {
1518 ret = snd_soc_dapm_new_controls(dapm,
1519 component->driver->dapm_widgets,
1520 component->driver->num_dapm_widgets);
1523 dev_err(component->dev,
1524 "Failed to create new controls %d\n", ret);
1529 list_for_each_entry(dai, &component->dai_list, list) {
1530 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1532 dev_err(component->dev,
1533 "Failed to create DAI widgets %d\n", ret);
1538 if (component->probe) {
1539 ret = component->probe(component);
1541 dev_err(component->dev,
1542 "ASoC: failed to probe component %d\n", ret);
1546 WARN(dapm->idle_bias_off &&
1547 dapm->bias_level != SND_SOC_BIAS_OFF,
1548 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1552 /* machine specific init */
1553 if (component->init) {
1554 ret = component->init(component);
1556 dev_err(component->dev,
1557 "Failed to do machine specific init %d\n", ret);
1562 if (component->driver->controls)
1563 snd_soc_add_component_controls(component,
1564 component->driver->controls,
1565 component->driver->num_controls);
1566 if (component->driver->dapm_routes)
1567 snd_soc_dapm_add_routes(dapm,
1568 component->driver->dapm_routes,
1569 component->driver->num_dapm_routes);
1571 list_add(&dapm->list, &card->dapm_list);
1572 list_add(&component->card_list, &card->component_dev_list);
1577 soc_cleanup_component_debugfs(component);
1578 component->card = NULL;
1579 module_put(component->dev->driver->owner);
1584 static void rtd_release(struct device *dev)
1589 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1594 /* register the rtd device */
1595 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1598 device_initialize(rtd->dev);
1599 rtd->dev->parent = rtd->card->dev;
1600 rtd->dev->release = rtd_release;
1601 rtd->dev->groups = soc_dev_attr_groups;
1602 dev_set_name(rtd->dev, "%s", name);
1603 dev_set_drvdata(rtd->dev, rtd);
1604 mutex_init(&rtd->pcm_mutex);
1605 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1606 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1607 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1608 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1609 ret = device_add(rtd->dev);
1611 /* calling put_device() here to free the rtd->dev */
1612 put_device(rtd->dev);
1613 dev_err(rtd->card->dev,
1614 "ASoC: failed to register runtime device: %d\n", ret);
1617 rtd->dev_registered = 1;
1621 static int soc_probe_link_components(struct snd_soc_card *card,
1622 struct snd_soc_pcm_runtime *rtd,
1625 struct snd_soc_component *component;
1626 struct snd_soc_rtdcom_list *rtdcom;
1629 for_each_rtdcom(rtd, rtdcom) {
1630 component = rtdcom->component;
1632 if (component->driver->probe_order == order) {
1633 ret = soc_probe_component(card, component);
1642 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1646 if (!dai->probed && dai->driver->probe_order == order) {
1647 if (dai->driver->probe) {
1648 ret = dai->driver->probe(dai);
1651 "ASoC: failed to probe DAI %s: %d\n",
1663 static int soc_link_dai_pcm_new(struct snd_soc_dai **dais, int num_dais,
1664 struct snd_soc_pcm_runtime *rtd)
1668 for (i = 0; i < num_dais; ++i) {
1669 struct snd_soc_dai_driver *drv = dais[i]->driver;
1671 if (!rtd->dai_link->no_pcm && drv->pcm_new)
1672 ret = drv->pcm_new(rtd, dais[i]);
1674 dev_err(dais[i]->dev,
1675 "ASoC: Failed to bind %s with pcm device\n",
1684 static int soc_link_dai_widgets(struct snd_soc_card *card,
1685 struct snd_soc_dai_link *dai_link,
1686 struct snd_soc_pcm_runtime *rtd)
1688 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1689 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1690 struct snd_soc_dapm_widget *sink, *source;
1693 if (rtd->num_codecs > 1)
1694 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1696 /* link the DAI widgets */
1697 sink = codec_dai->playback_widget;
1698 source = cpu_dai->capture_widget;
1699 if (sink && source) {
1700 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1701 dai_link->num_params,
1704 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1705 sink->name, source->name, ret);
1710 sink = cpu_dai->playback_widget;
1711 source = codec_dai->capture_widget;
1712 if (sink && source) {
1713 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1714 dai_link->num_params,
1717 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1718 sink->name, source->name, ret);
1726 static int soc_probe_link_dais(struct snd_soc_card *card,
1727 struct snd_soc_pcm_runtime *rtd, int order)
1729 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1730 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1733 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1734 card->name, rtd->num, order);
1736 /* set default power off timeout */
1737 rtd->pmdown_time = pmdown_time;
1739 ret = soc_probe_dai(cpu_dai, order);
1743 /* probe the CODEC DAI */
1744 for (i = 0; i < rtd->num_codecs; i++) {
1745 ret = soc_probe_dai(rtd->codec_dais[i], order);
1750 /* complete DAI probe during last probe */
1751 if (order != SND_SOC_COMP_ORDER_LAST)
1754 /* do machine specific initialization */
1755 if (dai_link->init) {
1756 ret = dai_link->init(rtd);
1758 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1759 dai_link->name, ret);
1764 if (dai_link->dai_fmt)
1765 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1767 ret = soc_post_component_init(rtd, dai_link->name);
1771 #ifdef CONFIG_DEBUG_FS
1772 /* add DPCM sysfs entries */
1773 if (dai_link->dynamic)
1774 soc_dpcm_debugfs_add(rtd);
1777 if (cpu_dai->driver->compress_new) {
1778 /*create compress_device"*/
1779 ret = cpu_dai->driver->compress_new(rtd, rtd->num);
1781 dev_err(card->dev, "ASoC: can't create compress %s\n",
1782 dai_link->stream_name);
1787 if (!dai_link->params) {
1788 /* create the pcm */
1789 ret = soc_new_pcm(rtd, rtd->num);
1791 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1792 dai_link->stream_name, ret);
1795 ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd);
1798 ret = soc_link_dai_pcm_new(rtd->codec_dais,
1799 rtd->num_codecs, rtd);
1803 INIT_DELAYED_WORK(&rtd->delayed_work,
1804 codec2codec_close_delayed_work);
1806 /* link the DAI widgets */
1807 ret = soc_link_dai_widgets(card, dai_link, rtd);
1816 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1818 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1819 struct snd_soc_component *component;
1821 struct device_node *codec_of_node;
1823 if (aux_dev->codec_of_node || aux_dev->codec_name) {
1824 /* codecs, usually analog devices */
1825 name = aux_dev->codec_name;
1826 codec_of_node = aux_dev->codec_of_node;
1827 component = soc_find_component(codec_of_node, name);
1830 name = of_node_full_name(codec_of_node);
1833 } else if (aux_dev->name) {
1834 /* generic components */
1835 name = aux_dev->name;
1836 component = soc_find_component(NULL, name);
1840 dev_err(card->dev, "ASoC: Invalid auxiliary device\n");
1844 component->init = aux_dev->init;
1845 list_add(&component->card_aux_list, &card->aux_comp_list);
1850 dev_err(card->dev, "ASoC: %s not registered\n", name);
1851 return -EPROBE_DEFER;
1854 static int soc_probe_aux_devices(struct snd_soc_card *card)
1856 struct snd_soc_component *comp;
1860 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1862 list_for_each_entry(comp, &card->aux_comp_list, card_aux_list) {
1863 if (comp->driver->probe_order == order) {
1864 ret = soc_probe_component(card, comp);
1867 "ASoC: failed to probe aux component %s %d\n",
1878 static void soc_remove_aux_devices(struct snd_soc_card *card)
1880 struct snd_soc_component *comp, *_comp;
1883 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1885 list_for_each_entry_safe(comp, _comp,
1886 &card->aux_comp_list, card_aux_list) {
1888 if (comp->driver->remove_order == order) {
1889 soc_remove_component(comp);
1890 /* remove it from the card's aux_comp_list */
1891 list_del(&comp->card_aux_list);
1897 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1901 if (codec->cache_init)
1904 ret = snd_soc_cache_init(codec);
1907 "ASoC: Failed to set cache compression type: %d\n",
1911 codec->cache_init = 1;
1916 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1917 * @rtd: The runtime for which the DAI link format should be changed
1918 * @dai_fmt: The new DAI link format
1920 * This function updates the DAI link format for all DAIs connected to the DAI
1921 * link for the specified runtime.
1923 * Note: For setups with a static format set the dai_fmt field in the
1924 * corresponding snd_dai_link struct instead of using this function.
1926 * Returns 0 on success, otherwise a negative error code.
1928 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1929 unsigned int dai_fmt)
1931 struct snd_soc_dai **codec_dais = rtd->codec_dais;
1932 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1936 for (i = 0; i < rtd->num_codecs; i++) {
1937 struct snd_soc_dai *codec_dai = codec_dais[i];
1939 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1940 if (ret != 0 && ret != -ENOTSUPP) {
1941 dev_warn(codec_dai->dev,
1942 "ASoC: Failed to set DAI format: %d\n", ret);
1947 /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1948 if (cpu_dai->codec) {
1949 unsigned int inv_dai_fmt;
1951 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1952 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1953 case SND_SOC_DAIFMT_CBM_CFM:
1954 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1956 case SND_SOC_DAIFMT_CBM_CFS:
1957 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1959 case SND_SOC_DAIFMT_CBS_CFM:
1960 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1962 case SND_SOC_DAIFMT_CBS_CFS:
1963 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1967 dai_fmt = inv_dai_fmt;
1970 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1971 if (ret != 0 && ret != -ENOTSUPP) {
1972 dev_warn(cpu_dai->dev,
1973 "ASoC: Failed to set DAI format: %d\n", ret);
1979 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1983 /* Trim special characters, and replace '-' with '_' since '-' is used to
1984 * separate different DMI fields in the card long name. Only number and
1985 * alphabet characters and a few separator characters are kept.
1987 static void cleanup_dmi_name(char *name)
1991 for (i = 0; name[i]; i++) {
1992 if (isalnum(name[i]) || (name[i] == '.')
1993 || (name[i] == '_'))
1994 name[j++] = name[i];
1995 else if (name[i] == '-')
2002 /* Check if a DMI field is valid, i.e. not containing any string
2003 * in the black list.
2005 static int is_dmi_valid(const char *field)
2009 while (dmi_blacklist[i]) {
2010 if (strstr(field, dmi_blacklist[i]))
2019 * snd_soc_set_dmi_name() - Register DMI names to card
2020 * @card: The card to register DMI names
2021 * @flavour: The flavour "differentiator" for the card amongst its peers.
2023 * An Intel machine driver may be used by many different devices but are
2024 * difficult for userspace to differentiate, since machine drivers ususally
2025 * use their own name as the card short name and leave the card long name
2026 * blank. To differentiate such devices and fix bugs due to lack of
2027 * device-specific configurations, this function allows DMI info to be used
2028 * as the sound card long name, in the format of
2029 * "vendor-product-version-board"
2030 * (Character '-' is used to separate different DMI fields here).
2031 * This will help the user space to load the device-specific Use Case Manager
2032 * (UCM) configurations for the card.
2034 * Possible card long names may be:
2035 * DellInc.-XPS139343-01-0310JH
2036 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
2037 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
2039 * This function also supports flavoring the card longname to provide
2040 * the extra differentiation, like "vendor-product-version-board-flavor".
2042 * We only keep number and alphabet characters and a few separator characters
2043 * in the card long name since UCM in the user space uses the card long names
2044 * as card configuration directory names and AudoConf cannot support special
2045 * charactors like SPACE.
2047 * Returns 0 on success, otherwise a negative error code.
2049 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
2051 const char *vendor, *product, *product_version, *board;
2052 size_t longname_buf_size = sizeof(card->snd_card->longname);
2055 if (card->long_name)
2056 return 0; /* long name already set by driver or from DMI */
2058 /* make up dmi long name as: vendor.product.version.board */
2059 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
2060 if (!vendor || !is_dmi_valid(vendor)) {
2061 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
2066 snprintf(card->dmi_longname, sizeof(card->snd_card->longname),
2068 cleanup_dmi_name(card->dmi_longname);
2070 product = dmi_get_system_info(DMI_PRODUCT_NAME);
2071 if (product && is_dmi_valid(product)) {
2072 len = strlen(card->dmi_longname);
2073 snprintf(card->dmi_longname + len,
2074 longname_buf_size - len,
2077 len++; /* skip the separator "-" */
2078 if (len < longname_buf_size)
2079 cleanup_dmi_name(card->dmi_longname + len);
2081 /* some vendors like Lenovo may only put a self-explanatory
2082 * name in the product version field
2084 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
2085 if (product_version && is_dmi_valid(product_version)) {
2086 len = strlen(card->dmi_longname);
2087 snprintf(card->dmi_longname + len,
2088 longname_buf_size - len,
2089 "-%s", product_version);
2092 if (len < longname_buf_size)
2093 cleanup_dmi_name(card->dmi_longname + len);
2097 board = dmi_get_system_info(DMI_BOARD_NAME);
2098 if (board && is_dmi_valid(board)) {
2099 len = strlen(card->dmi_longname);
2100 snprintf(card->dmi_longname + len,
2101 longname_buf_size - len,
2105 if (len < longname_buf_size)
2106 cleanup_dmi_name(card->dmi_longname + len);
2107 } else if (!product) {
2108 /* fall back to using legacy name */
2109 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
2113 /* Add flavour to dmi long name */
2115 len = strlen(card->dmi_longname);
2116 snprintf(card->dmi_longname + len,
2117 longname_buf_size - len,
2121 if (len < longname_buf_size)
2122 cleanup_dmi_name(card->dmi_longname + len);
2125 /* set the card long name */
2126 card->long_name = card->dmi_longname;
2130 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
2131 #endif /* CONFIG_DMI */
2133 static int snd_soc_instantiate_card(struct snd_soc_card *card)
2135 struct snd_soc_codec *codec;
2136 struct snd_soc_pcm_runtime *rtd;
2137 struct snd_soc_dai_link *dai_link;
2140 mutex_lock(&client_mutex);
2141 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
2144 for (i = 0; i < card->num_links; i++) {
2145 ret = soc_bind_dai_link(card, &card->dai_link[i]);
2150 /* bind aux_devs too */
2151 for (i = 0; i < card->num_aux_devs; i++) {
2152 ret = soc_bind_aux_dev(card, i);
2157 /* add predefined DAI links to the list */
2158 for (i = 0; i < card->num_links; i++)
2159 snd_soc_add_dai_link(card, card->dai_link+i);
2161 /* initialize the register cache for each available codec */
2162 list_for_each_entry(codec, &codec_list, list) {
2163 if (codec->cache_init)
2165 ret = snd_soc_init_codec_cache(codec);
2170 /* card bind complete so register a sound card */
2171 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2172 card->owner, 0, &card->snd_card);
2175 "ASoC: can't create sound card for card %s: %d\n",
2180 soc_init_card_debugfs(card);
2182 card->dapm.bias_level = SND_SOC_BIAS_OFF;
2183 card->dapm.dev = card->dev;
2184 card->dapm.card = card;
2185 list_add(&card->dapm.list, &card->dapm_list);
2187 #ifdef CONFIG_DEBUG_FS
2188 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
2191 #ifdef CONFIG_PM_SLEEP
2192 /* deferred resume work */
2193 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
2196 if (card->dapm_widgets)
2197 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2198 card->num_dapm_widgets);
2200 if (card->of_dapm_widgets)
2201 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2202 card->num_of_dapm_widgets);
2204 /* initialise the sound card only once */
2206 ret = card->probe(card);
2208 goto card_probe_error;
2211 /* probe all components used by DAI links on this card */
2212 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
2214 list_for_each_entry(rtd, &card->rtd_list, list) {
2215 ret = soc_probe_link_components(card, rtd, order);
2218 "ASoC: failed to instantiate card %d\n",
2225 /* probe auxiliary components */
2226 ret = soc_probe_aux_devices(card);
2230 /* Find new DAI links added during probing components and bind them.
2231 * Components with topology may bring new DAIs and DAI links.
2233 list_for_each_entry(dai_link, &card->dai_link_list, list) {
2234 if (soc_is_dai_link_bound(card, dai_link))
2237 ret = soc_init_dai_link(card, dai_link);
2240 ret = soc_bind_dai_link(card, dai_link);
2245 /* probe all DAI links on this card */
2246 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
2248 list_for_each_entry(rtd, &card->rtd_list, list) {
2249 ret = soc_probe_link_dais(card, rtd, order);
2252 "ASoC: failed to instantiate card %d\n",
2259 snd_soc_dapm_link_dai_widgets(card);
2260 snd_soc_dapm_connect_dai_link_widgets(card);
2263 snd_soc_add_card_controls(card, card->controls, card->num_controls);
2265 if (card->dapm_routes)
2266 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2267 card->num_dapm_routes);
2269 if (card->of_dapm_routes)
2270 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2271 card->num_of_dapm_routes);
2273 /* try to set some sane longname if DMI is available */
2274 snd_soc_set_dmi_name(card, NULL);
2276 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
2278 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
2279 "%s", card->long_name ? card->long_name : card->name);
2280 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
2281 "%s", card->driver_name ? card->driver_name : card->name);
2282 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
2283 switch (card->snd_card->driver[i]) {
2289 if (!isalnum(card->snd_card->driver[i]))
2290 card->snd_card->driver[i] = '_';
2295 if (card->late_probe) {
2296 ret = card->late_probe(card);
2298 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2300 goto probe_aux_dev_err;
2304 snd_soc_dapm_new_widgets(card);
2306 ret = snd_card_register(card->snd_card);
2308 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2310 goto probe_aux_dev_err;
2313 card->instantiated = 1;
2314 snd_soc_dapm_sync(&card->dapm);
2315 mutex_unlock(&card->mutex);
2316 mutex_unlock(&client_mutex);
2321 soc_remove_aux_devices(card);
2324 soc_remove_dai_links(card);
2330 snd_soc_dapm_free(&card->dapm);
2331 soc_cleanup_card_debugfs(card);
2332 snd_card_free(card->snd_card);
2335 soc_remove_pcm_runtimes(card);
2336 mutex_unlock(&card->mutex);
2337 mutex_unlock(&client_mutex);
2342 /* probes a new socdev */
2343 static int soc_probe(struct platform_device *pdev)
2345 struct snd_soc_card *card = platform_get_drvdata(pdev);
2348 * no card, so machine driver should be registering card
2349 * we should not be here in that case so ret error
2354 dev_warn(&pdev->dev,
2355 "ASoC: machine %s should use snd_soc_register_card()\n",
2358 /* Bodge while we unpick instantiation */
2359 card->dev = &pdev->dev;
2361 return snd_soc_register_card(card);
2364 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2366 struct snd_soc_pcm_runtime *rtd;
2368 /* make sure any delayed work runs */
2369 list_for_each_entry(rtd, &card->rtd_list, list)
2370 flush_delayed_work(&rtd->delayed_work);
2372 /* free the ALSA card at first; this syncs with pending operations */
2373 snd_card_free(card->snd_card);
2375 /* remove and free each DAI */
2376 soc_remove_dai_links(card);
2377 soc_remove_pcm_runtimes(card);
2379 /* remove auxiliary devices */
2380 soc_remove_aux_devices(card);
2382 snd_soc_dapm_free(&card->dapm);
2383 soc_cleanup_card_debugfs(card);
2385 /* remove the card */
2392 /* removes a socdev */
2393 static int soc_remove(struct platform_device *pdev)
2395 struct snd_soc_card *card = platform_get_drvdata(pdev);
2397 snd_soc_unregister_card(card);
2401 int snd_soc_poweroff(struct device *dev)
2403 struct snd_soc_card *card = dev_get_drvdata(dev);
2404 struct snd_soc_pcm_runtime *rtd;
2406 if (!card->instantiated)
2409 /* Flush out pmdown_time work - we actually do want to run it
2410 * now, we're shutting down so no imminent restart. */
2411 list_for_each_entry(rtd, &card->rtd_list, list)
2412 flush_delayed_work(&rtd->delayed_work);
2414 snd_soc_dapm_shutdown(card);
2416 /* deactivate pins to sleep state */
2417 list_for_each_entry(rtd, &card->rtd_list, list) {
2418 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2421 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2422 for (i = 0; i < rtd->num_codecs; i++) {
2423 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
2424 pinctrl_pm_select_sleep_state(codec_dai->dev);
2430 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2432 const struct dev_pm_ops snd_soc_pm_ops = {
2433 .suspend = snd_soc_suspend,
2434 .resume = snd_soc_resume,
2435 .freeze = snd_soc_suspend,
2436 .thaw = snd_soc_resume,
2437 .poweroff = snd_soc_poweroff,
2438 .restore = snd_soc_resume,
2440 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2442 /* ASoC platform driver */
2443 static struct platform_driver soc_driver = {
2445 .name = "soc-audio",
2446 .pm = &snd_soc_pm_ops,
2449 .remove = soc_remove,
2453 * snd_soc_cnew - create new control
2454 * @_template: control template
2455 * @data: control private data
2456 * @long_name: control long name
2457 * @prefix: control name prefix
2459 * Create a new mixer control from a template control.
2461 * Returns 0 for success, else error.
2463 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2464 void *data, const char *long_name,
2467 struct snd_kcontrol_new template;
2468 struct snd_kcontrol *kcontrol;
2471 memcpy(&template, _template, sizeof(template));
2475 long_name = template.name;
2478 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2482 template.name = name;
2484 template.name = long_name;
2487 kcontrol = snd_ctl_new1(&template, data);
2493 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2495 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2496 const struct snd_kcontrol_new *controls, int num_controls,
2497 const char *prefix, void *data)
2501 for (i = 0; i < num_controls; i++) {
2502 const struct snd_kcontrol_new *control = &controls[i];
2503 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2504 control->name, prefix));
2506 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2507 control->name, err);
2515 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2518 struct snd_card *card = soc_card->snd_card;
2519 struct snd_kcontrol *kctl;
2521 if (unlikely(!name))
2524 list_for_each_entry(kctl, &card->controls, list)
2525 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2529 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2532 * snd_soc_add_component_controls - Add an array of controls to a component.
2534 * @component: Component to add controls to
2535 * @controls: Array of controls to add
2536 * @num_controls: Number of elements in the array
2538 * Return: 0 for success, else error.
2540 int snd_soc_add_component_controls(struct snd_soc_component *component,
2541 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2543 struct snd_card *card = component->card->snd_card;
2545 return snd_soc_add_controls(card, component->dev, controls,
2546 num_controls, component->name_prefix, component);
2548 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2551 * snd_soc_add_codec_controls - add an array of controls to a codec.
2552 * Convenience function to add a list of controls. Many codecs were
2553 * duplicating this code.
2555 * @codec: codec to add controls to
2556 * @controls: array of controls to add
2557 * @num_controls: number of elements in the array
2559 * Return 0 for success, else error.
2561 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2562 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2564 return snd_soc_add_component_controls(&codec->component, controls,
2567 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
2570 * snd_soc_add_platform_controls - add an array of controls to a platform.
2571 * Convenience function to add a list of controls.
2573 * @platform: platform to add controls to
2574 * @controls: array of controls to add
2575 * @num_controls: number of elements in the array
2577 * Return 0 for success, else error.
2579 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
2580 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2582 return snd_soc_add_component_controls(&platform->component, controls,
2585 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
2588 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2589 * Convenience function to add a list of controls.
2591 * @soc_card: SoC card to add controls to
2592 * @controls: array of controls to add
2593 * @num_controls: number of elements in the array
2595 * Return 0 for success, else error.
2597 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2598 const struct snd_kcontrol_new *controls, int num_controls)
2600 struct snd_card *card = soc_card->snd_card;
2602 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2605 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2608 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2609 * Convienience function to add a list of controls.
2611 * @dai: DAI to add controls to
2612 * @controls: array of controls to add
2613 * @num_controls: number of elements in the array
2615 * Return 0 for success, else error.
2617 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2618 const struct snd_kcontrol_new *controls, int num_controls)
2620 struct snd_card *card = dai->component->card->snd_card;
2622 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2625 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2628 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2630 * @clk_id: DAI specific clock ID
2631 * @freq: new clock frequency in Hz
2632 * @dir: new clock direction - input/output.
2634 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2636 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2637 unsigned int freq, int dir)
2639 if (dai->driver->ops->set_sysclk)
2640 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2642 return snd_soc_component_set_sysclk(dai->component, clk_id, 0,
2645 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2648 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2650 * @clk_id: DAI specific clock ID
2651 * @source: Source for the clock
2652 * @freq: new clock frequency in Hz
2653 * @dir: new clock direction - input/output.
2655 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2657 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2658 int source, unsigned int freq, int dir)
2660 if (codec->driver->set_sysclk)
2661 return codec->driver->set_sysclk(codec, clk_id, source,
2666 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2669 * snd_soc_component_set_sysclk - configure COMPONENT system or master clock.
2670 * @component: COMPONENT
2671 * @clk_id: DAI specific clock ID
2672 * @source: Source for the clock
2673 * @freq: new clock frequency in Hz
2674 * @dir: new clock direction - input/output.
2676 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2678 int snd_soc_component_set_sysclk(struct snd_soc_component *component, int clk_id,
2679 int source, unsigned int freq, int dir)
2681 /* will be removed */
2682 if (component->set_sysclk)
2683 return component->set_sysclk(component, clk_id, source,
2686 if (component->driver->set_sysclk)
2687 return component->driver->set_sysclk(component, clk_id, source,
2692 EXPORT_SYMBOL_GPL(snd_soc_component_set_sysclk);
2695 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2697 * @div_id: DAI specific clock divider ID
2698 * @div: new clock divisor.
2700 * Configures the clock dividers. This is used to derive the best DAI bit and
2701 * frame clocks from the system or master clock. It's best to set the DAI bit
2702 * and frame clocks as low as possible to save system power.
2704 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2705 int div_id, int div)
2707 if (dai->driver->ops->set_clkdiv)
2708 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2712 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2715 * snd_soc_dai_set_pll - configure DAI PLL.
2717 * @pll_id: DAI specific PLL ID
2718 * @source: DAI specific source for the PLL
2719 * @freq_in: PLL input clock frequency in Hz
2720 * @freq_out: requested PLL output clock frequency in Hz
2722 * Configures and enables PLL to generate output clock based on input clock.
2724 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2725 unsigned int freq_in, unsigned int freq_out)
2727 if (dai->driver->ops->set_pll)
2728 return dai->driver->ops->set_pll(dai, pll_id, source,
2731 return snd_soc_component_set_pll(dai->component, pll_id, source,
2734 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2737 * snd_soc_codec_set_pll - configure codec PLL.
2739 * @pll_id: DAI specific PLL ID
2740 * @source: DAI specific source for the PLL
2741 * @freq_in: PLL input clock frequency in Hz
2742 * @freq_out: requested PLL output clock frequency in Hz
2744 * Configures and enables PLL to generate output clock based on input clock.
2746 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2747 unsigned int freq_in, unsigned int freq_out)
2749 if (codec->driver->set_pll)
2750 return codec->driver->set_pll(codec, pll_id, source,
2755 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2758 * snd_soc_component_set_pll - configure component PLL.
2759 * @component: COMPONENT
2760 * @pll_id: DAI specific PLL ID
2761 * @source: DAI specific source for the PLL
2762 * @freq_in: PLL input clock frequency in Hz
2763 * @freq_out: requested PLL output clock frequency in Hz
2765 * Configures and enables PLL to generate output clock based on input clock.
2767 int snd_soc_component_set_pll(struct snd_soc_component *component, int pll_id,
2768 int source, unsigned int freq_in,
2769 unsigned int freq_out)
2771 /* will be removed */
2772 if (component->set_pll)
2773 return component->set_pll(component, pll_id, source,
2776 if (component->driver->set_pll)
2777 return component->driver->set_pll(component, pll_id, source,
2782 EXPORT_SYMBOL_GPL(snd_soc_component_set_pll);
2785 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2787 * @ratio: Ratio of BCLK to Sample rate.
2789 * Configures the DAI for a preset BCLK to sample rate ratio.
2791 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2793 if (dai->driver->ops->set_bclk_ratio)
2794 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2798 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2801 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2803 * @fmt: SND_SOC_DAIFMT_* format value.
2805 * Configures the DAI hardware format and clocking.
2807 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2809 if (dai->driver == NULL)
2811 if (dai->driver->ops->set_fmt == NULL)
2813 return dai->driver->ops->set_fmt(dai, fmt);
2815 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2818 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2819 * @slots: Number of slots in use.
2820 * @tx_mask: bitmask representing active TX slots.
2821 * @rx_mask: bitmask representing active RX slots.
2823 * Generates the TDM tx and rx slot default masks for DAI.
2825 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2826 unsigned int *tx_mask,
2827 unsigned int *rx_mask)
2829 if (*tx_mask || *rx_mask)
2835 *tx_mask = (1 << slots) - 1;
2836 *rx_mask = (1 << slots) - 1;
2842 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2843 * @dai: The DAI to configure
2844 * @tx_mask: bitmask representing active TX slots.
2845 * @rx_mask: bitmask representing active RX slots.
2846 * @slots: Number of slots in use.
2847 * @slot_width: Width in bits for each slot.
2849 * This function configures the specified DAI for TDM operation. @slot contains
2850 * the total number of slots of the TDM stream and @slot_with the width of each
2851 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2852 * active slots of the TDM stream for the specified DAI, i.e. which slots the
2853 * DAI should write to or read from. If a bit is set the corresponding slot is
2854 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2855 * the first slot, bit 1 to the second slot and so on. The first active slot
2856 * maps to the first channel of the DAI, the second active slot to the second
2857 * channel and so on.
2859 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2860 * @rx_mask and @slot_width will be ignored.
2862 * Returns 0 on success, a negative error code otherwise.
2864 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2865 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2867 if (dai->driver->ops->xlate_tdm_slot_mask)
2868 dai->driver->ops->xlate_tdm_slot_mask(slots,
2869 &tx_mask, &rx_mask);
2871 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2873 dai->tx_mask = tx_mask;
2874 dai->rx_mask = rx_mask;
2876 if (dai->driver->ops->set_tdm_slot)
2877 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2882 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2885 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2887 * @tx_num: how many TX channels
2888 * @tx_slot: pointer to an array which imply the TX slot number channel
2890 * @rx_num: how many RX channels
2891 * @rx_slot: pointer to an array which imply the RX slot number channel
2894 * configure the relationship between channel number and TDM slot number.
2896 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2897 unsigned int tx_num, unsigned int *tx_slot,
2898 unsigned int rx_num, unsigned int *rx_slot)
2900 if (dai->driver->ops->set_channel_map)
2901 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2906 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2909 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2911 * @tristate: tristate enable
2913 * Tristates the DAI so that others can use it.
2915 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2917 if (dai->driver->ops->set_tristate)
2918 return dai->driver->ops->set_tristate(dai, tristate);
2922 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2925 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2927 * @mute: mute enable
2928 * @direction: stream to mute
2930 * Mutes the DAI DAC.
2932 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2938 if (dai->driver->ops->mute_stream)
2939 return dai->driver->ops->mute_stream(dai, mute, direction);
2940 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2941 dai->driver->ops->digital_mute)
2942 return dai->driver->ops->digital_mute(dai, mute);
2946 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2949 * snd_soc_register_card - Register a card with the ASoC core
2951 * @card: Card to register
2954 int snd_soc_register_card(struct snd_soc_card *card)
2957 struct snd_soc_pcm_runtime *rtd;
2959 if (!card->name || !card->dev)
2962 for (i = 0; i < card->num_links; i++) {
2963 struct snd_soc_dai_link *link = &card->dai_link[i];
2965 ret = soc_init_dai_link(card, link);
2967 dev_err(card->dev, "ASoC: failed to init link %s\n",
2973 dev_set_drvdata(card->dev, card);
2975 snd_soc_initialize_card_lists(card);
2977 INIT_LIST_HEAD(&card->dai_link_list);
2978 card->num_dai_links = 0;
2980 INIT_LIST_HEAD(&card->rtd_list);
2983 INIT_LIST_HEAD(&card->dapm_dirty);
2984 INIT_LIST_HEAD(&card->dobj_list);
2985 card->instantiated = 0;
2986 mutex_init(&card->mutex);
2987 mutex_init(&card->dapm_mutex);
2989 ret = snd_soc_instantiate_card(card);
2993 /* deactivate pins to sleep state */
2994 list_for_each_entry(rtd, &card->rtd_list, list) {
2995 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2998 for (j = 0; j < rtd->num_codecs; j++) {
2999 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
3000 if (!codec_dai->active)
3001 pinctrl_pm_select_sleep_state(codec_dai->dev);
3004 if (!cpu_dai->active)
3005 pinctrl_pm_select_sleep_state(cpu_dai->dev);
3010 EXPORT_SYMBOL_GPL(snd_soc_register_card);
3013 * snd_soc_unregister_card - Unregister a card with the ASoC core
3015 * @card: Card to unregister
3018 int snd_soc_unregister_card(struct snd_soc_card *card)
3020 if (card->instantiated) {
3021 card->instantiated = false;
3022 snd_soc_dapm_shutdown(card);
3023 soc_cleanup_card_resources(card);
3024 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
3029 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
3032 * Simplify DAI link configuration by removing ".-1" from device names
3033 * and sanitizing names.
3035 static char *fmt_single_name(struct device *dev, int *id)
3037 char *found, name[NAME_SIZE];
3040 if (dev_name(dev) == NULL)
3043 strlcpy(name, dev_name(dev), NAME_SIZE);
3045 /* are we a "%s.%d" name (platform and SPI components) */
3046 found = strstr(name, dev->driver->name);
3049 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
3051 /* discard ID from name if ID == -1 */
3053 found[strlen(dev->driver->name)] = '\0';
3057 /* I2C component devices are named "bus-addr" */
3058 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
3059 char tmp[NAME_SIZE];
3061 /* create unique ID number from I2C addr and bus */
3062 *id = ((id1 & 0xffff) << 16) + id2;
3064 /* sanitize component name for DAI link creation */
3065 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3066 strlcpy(name, tmp, NAME_SIZE);
3071 return kstrdup(name, GFP_KERNEL);
3075 * Simplify DAI link naming for single devices with multiple DAIs by removing
3076 * any ".-1" and using the DAI name (instead of device name).
3078 static inline char *fmt_multiple_name(struct device *dev,
3079 struct snd_soc_dai_driver *dai_drv)
3081 if (dai_drv->name == NULL) {
3083 "ASoC: error - multiple DAI %s registered with no name\n",
3088 return kstrdup(dai_drv->name, GFP_KERNEL);
3092 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
3094 * @component: The component for which the DAIs should be unregistered
3096 static void snd_soc_unregister_dais(struct snd_soc_component *component)
3098 struct snd_soc_dai *dai, *_dai;
3100 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
3101 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
3103 list_del(&dai->list);
3109 /* Create a DAI and add it to the component's DAI list */
3110 static struct snd_soc_dai *soc_add_dai(struct snd_soc_component *component,
3111 struct snd_soc_dai_driver *dai_drv,
3112 bool legacy_dai_naming)
3114 struct device *dev = component->dev;
3115 struct snd_soc_dai *dai;
3117 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
3119 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3124 * Back in the old days when we still had component-less DAIs,
3125 * instead of having a static name, component-less DAIs would
3126 * inherit the name of the parent device so it is possible to
3127 * register multiple instances of the DAI. We still need to keep
3128 * the same naming style even though those DAIs are not
3129 * component-less anymore.
3131 if (legacy_dai_naming &&
3132 (dai_drv->id == 0 || dai_drv->name == NULL)) {
3133 dai->name = fmt_single_name(dev, &dai->id);
3135 dai->name = fmt_multiple_name(dev, dai_drv);
3137 dai->id = dai_drv->id;
3139 dai->id = component->num_dai;
3141 if (dai->name == NULL) {
3146 dai->component = component;
3148 dai->driver = dai_drv;
3149 if (!dai->driver->ops)
3150 dai->driver->ops = &null_dai_ops;
3152 list_add(&dai->list, &component->dai_list);
3153 component->num_dai++;
3155 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
3160 * snd_soc_register_dais - Register a DAI with the ASoC core
3162 * @component: The component the DAIs are registered for
3163 * @dai_drv: DAI driver to use for the DAIs
3164 * @count: Number of DAIs
3165 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
3168 static int snd_soc_register_dais(struct snd_soc_component *component,
3169 struct snd_soc_dai_driver *dai_drv, size_t count,
3170 bool legacy_dai_naming)
3172 struct device *dev = component->dev;
3173 struct snd_soc_dai *dai;
3177 dev_dbg(dev, "ASoC: dai register %s #%zu\n", dev_name(dev), count);
3179 component->dai_drv = dai_drv;
3181 for (i = 0; i < count; i++) {
3183 dai = soc_add_dai(component, dai_drv + i,
3184 count == 1 && legacy_dai_naming);
3194 snd_soc_unregister_dais(component);
3200 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
3202 * @component: The component the DAIs are registered for
3203 * @dai_drv: DAI driver to use for the DAI
3205 * Topology can use this API to register DAIs when probing a component.
3206 * These DAIs's widgets will be freed in the card cleanup and the DAIs
3207 * will be freed in the component cleanup.
3209 int snd_soc_register_dai(struct snd_soc_component *component,
3210 struct snd_soc_dai_driver *dai_drv)
3212 struct snd_soc_dapm_context *dapm =
3213 snd_soc_component_get_dapm(component);
3214 struct snd_soc_dai *dai;
3217 if (dai_drv->dobj.type != SND_SOC_DOBJ_PCM) {
3218 dev_err(component->dev, "Invalid dai type %d\n",
3219 dai_drv->dobj.type);
3223 lockdep_assert_held(&client_mutex);
3224 dai = soc_add_dai(component, dai_drv, false);
3228 /* Create the DAI widgets here. After adding DAIs, topology may
3229 * also add routes that need these widgets as source or sink.
3231 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
3233 dev_err(component->dev,
3234 "Failed to create DAI widgets %d\n", ret);
3239 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
3241 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
3242 enum snd_soc_dapm_type type, int subseq)
3244 struct snd_soc_component *component = dapm->component;
3246 component->driver->seq_notifier(component, type, subseq);
3249 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
3252 struct snd_soc_component *component = dapm->component;
3254 return component->driver->stream_event(component, event);
3257 static int snd_soc_component_drv_pcm_new(struct snd_soc_component *component,
3258 struct snd_soc_pcm_runtime *rtd)
3260 if (component->driver->pcm_new)
3261 return component->driver->pcm_new(rtd);
3266 static void snd_soc_component_drv_pcm_free(struct snd_soc_component *component,
3267 struct snd_pcm *pcm)
3269 if (component->driver->pcm_free)
3270 component->driver->pcm_free(pcm);
3273 static int snd_soc_component_set_bias_level(struct snd_soc_dapm_context *dapm,
3274 enum snd_soc_bias_level level)
3276 struct snd_soc_component *component = dapm->component;
3278 return component->driver->set_bias_level(component, level);
3281 static int snd_soc_component_initialize(struct snd_soc_component *component,
3282 const struct snd_soc_component_driver *driver, struct device *dev)
3284 struct snd_soc_dapm_context *dapm;
3286 component->name = fmt_single_name(dev, &component->id);
3287 if (!component->name) {
3288 dev_err(dev, "ASoC: Failed to allocate name\n");
3292 component->dev = dev;
3293 component->driver = driver;
3294 component->probe = component->driver->probe;
3295 component->remove = component->driver->remove;
3296 component->suspend = component->driver->suspend;
3297 component->resume = component->driver->resume;
3298 component->set_sysclk = component->driver->set_sysclk;
3299 component->set_pll = component->driver->set_pll;
3300 component->set_jack = component->driver->set_jack;
3301 component->pcm_new = snd_soc_component_drv_pcm_new;
3302 component->pcm_free = snd_soc_component_drv_pcm_free;
3304 dapm = snd_soc_component_get_dapm(component);
3306 dapm->component = component;
3307 dapm->bias_level = SND_SOC_BIAS_OFF;
3308 dapm->idle_bias_off = !driver->idle_bias_on;
3309 dapm->suspend_bias_off = driver->suspend_bias_off;
3310 if (driver->seq_notifier)
3311 dapm->seq_notifier = snd_soc_component_seq_notifier;
3312 if (driver->stream_event)
3313 dapm->stream_event = snd_soc_component_stream_event;
3314 if (driver->set_bias_level)
3315 dapm->set_bias_level = snd_soc_component_set_bias_level;
3317 INIT_LIST_HEAD(&component->dai_list);
3318 mutex_init(&component->io_mutex);
3323 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
3325 int val_bytes = regmap_get_val_bytes(component->regmap);
3327 /* Errors are legitimate for non-integer byte multiples */
3329 component->val_bytes = val_bytes;
3332 #ifdef CONFIG_REGMAP
3335 * snd_soc_component_init_regmap() - Initialize regmap instance for the component
3336 * @component: The component for which to initialize the regmap instance
3337 * @regmap: The regmap instance that should be used by the component
3339 * This function allows deferred assignment of the regmap instance that is
3340 * associated with the component. Only use this if the regmap instance is not
3341 * yet ready when the component is registered. The function must also be called
3342 * before the first IO attempt of the component.
3344 void snd_soc_component_init_regmap(struct snd_soc_component *component,
3345 struct regmap *regmap)
3347 component->regmap = regmap;
3348 snd_soc_component_setup_regmap(component);
3350 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
3353 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
3354 * @component: The component for which to de-initialize the regmap instance
3356 * Calls regmap_exit() on the regmap instance associated to the component and
3357 * removes the regmap instance from the component.
3359 * This function should only be used if snd_soc_component_init_regmap() was used
3360 * to initialize the regmap instance.
3362 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
3364 regmap_exit(component->regmap);
3365 component->regmap = NULL;
3367 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
3371 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
3373 if (!component->write && !component->read) {
3374 if (!component->regmap)
3375 component->regmap = dev_get_regmap(component->dev, NULL);
3376 if (component->regmap)
3377 snd_soc_component_setup_regmap(component);
3380 list_add(&component->list, &component_list);
3381 INIT_LIST_HEAD(&component->dobj_list);
3384 static void snd_soc_component_add(struct snd_soc_component *component)
3386 mutex_lock(&client_mutex);
3387 snd_soc_component_add_unlocked(component);
3388 mutex_unlock(&client_mutex);
3391 static void snd_soc_component_cleanup(struct snd_soc_component *component)
3393 snd_soc_unregister_dais(component);
3394 kfree(component->name);
3397 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
3399 struct snd_soc_card *card = component->card;
3402 snd_soc_unregister_card(card);
3404 list_del(&component->list);
3407 #define ENDIANNESS_MAP(name) \
3408 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
3409 static u64 endianness_format_map[] = {
3410 ENDIANNESS_MAP(S16_),
3411 ENDIANNESS_MAP(U16_),
3412 ENDIANNESS_MAP(S24_),
3413 ENDIANNESS_MAP(U24_),
3414 ENDIANNESS_MAP(S32_),
3415 ENDIANNESS_MAP(U32_),
3416 ENDIANNESS_MAP(S24_3),
3417 ENDIANNESS_MAP(U24_3),
3418 ENDIANNESS_MAP(S20_3),
3419 ENDIANNESS_MAP(U20_3),
3420 ENDIANNESS_MAP(S18_3),
3421 ENDIANNESS_MAP(U18_3),
3422 ENDIANNESS_MAP(FLOAT_),
3423 ENDIANNESS_MAP(FLOAT64_),
3424 ENDIANNESS_MAP(IEC958_SUBFRAME_),
3428 * Fix up the DAI formats for endianness: codecs don't actually see
3429 * the endianness of the data but we're using the CPU format
3430 * definitions which do need to include endianness so we ensure that
3431 * codec DAIs always have both big and little endian variants set.
3433 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
3437 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
3438 if (stream->formats & endianness_format_map[i])
3439 stream->formats |= endianness_format_map[i];
3442 int snd_soc_add_component(struct device *dev,
3443 struct snd_soc_component *component,
3444 const struct snd_soc_component_driver *component_driver,
3445 struct snd_soc_dai_driver *dai_drv,
3451 ret = snd_soc_component_initialize(component, component_driver, dev);
3455 component->ignore_pmdown_time = true;
3456 component->registered_as_component = true;
3458 if (component_driver->endianness) {
3459 for (i = 0; i < num_dai; i++) {
3460 convert_endianness_formats(&dai_drv[i].playback);
3461 convert_endianness_formats(&dai_drv[i].capture);
3465 ret = snd_soc_register_dais(component, dai_drv, num_dai,
3466 !component_driver->non_legacy_dai_naming);
3468 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3472 snd_soc_component_add(component);
3477 snd_soc_component_cleanup(component);
3482 EXPORT_SYMBOL_GPL(snd_soc_add_component);
3484 int snd_soc_register_component(struct device *dev,
3485 const struct snd_soc_component_driver *component_driver,
3486 struct snd_soc_dai_driver *dai_drv,
3489 struct snd_soc_component *component;
3491 component = kzalloc(sizeof(*component), GFP_KERNEL);
3495 return snd_soc_add_component(dev, component, component_driver,