1 // SPDX-License-Identifier: GPL-2.0+
3 // soc-core.c -- ALSA SoC Audio Layer
5 // Copyright 2005 Wolfson Microelectronics PLC.
6 // Copyright 2005 Openedhand Ltd.
7 // Copyright (C) 2010 Slimlogic Ltd.
8 // Copyright (C) 2010 Texas Instruments Inc.
10 // Author: Liam Girdwood <lrg@slimlogic.co.uk>
11 // with code, comments and ideas from :-
12 // Richard Purdie <richard@openedhand.com>
15 // o Add hw rules to enforce rates, etc.
16 // o More testing with other codecs/machines.
17 // o Add more codecs and platforms to ensure good API coverage.
18 // o Support TDM on PCM and I2S
20 #include <linux/module.h>
21 #include <linux/moduleparam.h>
22 #include <linux/init.h>
23 #include <linux/delay.h>
25 #include <linux/bitops.h>
26 #include <linux/debugfs.h>
27 #include <linux/platform_device.h>
28 #include <linux/pinctrl/consumer.h>
29 #include <linux/ctype.h>
30 #include <linux/slab.h>
32 #include <linux/of_graph.h>
33 #include <linux/dmi.h>
34 #include <sound/core.h>
35 #include <sound/jack.h>
36 #include <sound/pcm.h>
37 #include <sound/pcm_params.h>
38 #include <sound/soc.h>
39 #include <sound/soc-dpcm.h>
40 #include <sound/soc-topology.h>
41 #include <sound/initval.h>
43 #define CREATE_TRACE_POINTS
44 #include <trace/events/asoc.h>
48 #ifdef CONFIG_DEBUG_FS
49 struct dentry *snd_soc_debugfs_root;
50 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
53 static DEFINE_MUTEX(client_mutex);
54 static LIST_HEAD(component_list);
57 * This is a timeout to do a DAPM powerdown after a stream is closed().
58 * It can be used to eliminate pops between different playback streams, e.g.
59 * between two audio tracks.
61 static int pmdown_time = 5000;
62 module_param(pmdown_time, int, 0);
63 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
65 /* If a DMI filed contain strings in this blacklist (e.g.
66 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
67 * as invalid and dropped when setting the card long name from DMI info.
69 static const char * const dmi_blacklist[] = {
70 "To be filled by OEM",
76 NULL, /* terminator */
79 static ssize_t pmdown_time_show(struct device *dev,
80 struct device_attribute *attr, char *buf)
82 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
84 return sprintf(buf, "%ld\n", rtd->pmdown_time);
87 static ssize_t pmdown_time_set(struct device *dev,
88 struct device_attribute *attr,
89 const char *buf, size_t count)
91 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
94 ret = kstrtol(buf, 10, &rtd->pmdown_time);
101 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
103 static struct attribute *soc_dev_attrs[] = {
104 &dev_attr_pmdown_time.attr,
108 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
109 struct attribute *attr, int idx)
111 struct device *dev = kobj_to_dev(kobj);
112 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
114 if (attr == &dev_attr_pmdown_time.attr)
115 return attr->mode; /* always visible */
116 return rtd->num_codecs ? attr->mode : 0; /* enabled only with codec */
119 static const struct attribute_group soc_dapm_dev_group = {
120 .attrs = soc_dapm_dev_attrs,
121 .is_visible = soc_dev_attr_is_visible,
124 static const struct attribute_group soc_dev_group = {
125 .attrs = soc_dev_attrs,
126 .is_visible = soc_dev_attr_is_visible,
129 static const struct attribute_group *soc_dev_attr_groups[] = {
135 #ifdef CONFIG_DEBUG_FS
136 static void soc_init_component_debugfs(struct snd_soc_component *component)
138 if (!component->card->debugfs_card_root)
141 if (component->debugfs_prefix) {
144 name = kasprintf(GFP_KERNEL, "%s:%s",
145 component->debugfs_prefix, component->name);
147 component->debugfs_root = debugfs_create_dir(name,
148 component->card->debugfs_card_root);
152 component->debugfs_root = debugfs_create_dir(component->name,
153 component->card->debugfs_card_root);
156 if (!component->debugfs_root) {
157 dev_warn(component->dev,
158 "ASoC: Failed to create component debugfs directory\n");
162 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
163 component->debugfs_root);
166 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
168 debugfs_remove_recursive(component->debugfs_root);
171 static int dai_list_show(struct seq_file *m, void *v)
173 struct snd_soc_component *component;
174 struct snd_soc_dai *dai;
176 mutex_lock(&client_mutex);
178 list_for_each_entry(component, &component_list, list)
179 list_for_each_entry(dai, &component->dai_list, list)
180 seq_printf(m, "%s\n", dai->name);
182 mutex_unlock(&client_mutex);
186 DEFINE_SHOW_ATTRIBUTE(dai_list);
188 static int component_list_show(struct seq_file *m, void *v)
190 struct snd_soc_component *component;
192 mutex_lock(&client_mutex);
194 list_for_each_entry(component, &component_list, list)
195 seq_printf(m, "%s\n", component->name);
197 mutex_unlock(&client_mutex);
201 DEFINE_SHOW_ATTRIBUTE(component_list);
203 static void soc_init_card_debugfs(struct snd_soc_card *card)
205 if (!snd_soc_debugfs_root)
208 card->debugfs_card_root = debugfs_create_dir(card->name,
209 snd_soc_debugfs_root);
210 if (!card->debugfs_card_root) {
212 "ASoC: Failed to create card debugfs directory\n");
216 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
217 card->debugfs_card_root,
219 if (!card->debugfs_pop_time)
221 "ASoC: Failed to create pop time debugfs file\n");
224 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
226 debugfs_remove_recursive(card->debugfs_card_root);
229 static void snd_soc_debugfs_init(void)
231 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
232 if (IS_ERR_OR_NULL(snd_soc_debugfs_root)) {
233 pr_warn("ASoC: Failed to create debugfs directory\n");
234 snd_soc_debugfs_root = NULL;
238 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
240 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
242 if (!debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
243 &component_list_fops))
244 pr_warn("ASoC: Failed to create component list debugfs file\n");
247 static void snd_soc_debugfs_exit(void)
249 debugfs_remove_recursive(snd_soc_debugfs_root);
254 static inline void soc_init_component_debugfs(
255 struct snd_soc_component *component)
259 static inline void soc_cleanup_component_debugfs(
260 struct snd_soc_component *component)
264 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
268 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
272 static inline void snd_soc_debugfs_init(void)
276 static inline void snd_soc_debugfs_exit(void)
282 static int snd_soc_rtdcom_add(struct snd_soc_pcm_runtime *rtd,
283 struct snd_soc_component *component)
285 struct snd_soc_rtdcom_list *rtdcom;
286 struct snd_soc_rtdcom_list *new_rtdcom;
288 for_each_rtdcom(rtd, rtdcom) {
289 /* already connected */
290 if (rtdcom->component == component)
294 new_rtdcom = kmalloc(sizeof(*new_rtdcom), GFP_KERNEL);
298 new_rtdcom->component = component;
299 INIT_LIST_HEAD(&new_rtdcom->list);
301 list_add_tail(&new_rtdcom->list, &rtd->component_list);
306 static void snd_soc_rtdcom_del_all(struct snd_soc_pcm_runtime *rtd)
308 struct snd_soc_rtdcom_list *rtdcom1, *rtdcom2;
310 for_each_rtdcom_safe(rtd, rtdcom1, rtdcom2)
313 INIT_LIST_HEAD(&rtd->component_list);
316 struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
317 const char *driver_name)
319 struct snd_soc_rtdcom_list *rtdcom;
324 for_each_rtdcom(rtd, rtdcom) {
325 const char *component_name = rtdcom->component->driver->name;
330 if ((component_name == driver_name) ||
331 strcmp(component_name, driver_name) == 0)
332 return rtdcom->component;
337 EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
339 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
340 const char *dai_link, int stream)
342 struct snd_soc_pcm_runtime *rtd;
344 list_for_each_entry(rtd, &card->rtd_list, list) {
345 if (rtd->dai_link->no_pcm &&
346 !strcmp(rtd->dai_link->name, dai_link))
347 return rtd->pcm->streams[stream].substream;
349 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
352 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
354 static const struct snd_soc_ops null_snd_soc_ops;
356 static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
357 struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
359 struct snd_soc_pcm_runtime *rtd;
361 rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
365 INIT_LIST_HEAD(&rtd->component_list);
367 rtd->dai_link = dai_link;
368 if (!rtd->dai_link->ops)
369 rtd->dai_link->ops = &null_snd_soc_ops;
371 rtd->codec_dais = kcalloc(dai_link->num_codecs,
372 sizeof(struct snd_soc_dai *),
374 if (!rtd->codec_dais) {
382 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
384 kfree(rtd->codec_dais);
385 snd_soc_rtdcom_del_all(rtd);
389 static void soc_add_pcm_runtime(struct snd_soc_card *card,
390 struct snd_soc_pcm_runtime *rtd)
392 list_add_tail(&rtd->list, &card->rtd_list);
393 rtd->num = card->num_rtd;
397 static void soc_remove_pcm_runtimes(struct snd_soc_card *card)
399 struct snd_soc_pcm_runtime *rtd, *_rtd;
401 list_for_each_entry_safe(rtd, _rtd, &card->rtd_list, list) {
402 list_del(&rtd->list);
403 soc_free_pcm_runtime(rtd);
409 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
410 const char *dai_link)
412 struct snd_soc_pcm_runtime *rtd;
414 list_for_each_entry(rtd, &card->rtd_list, list) {
415 if (!strcmp(rtd->dai_link->name, dai_link))
418 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
421 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
423 static void codec2codec_close_delayed_work(struct work_struct *work)
425 /* Currently nothing to do for c2c links
426 * Since c2c links are internal nodes in the DAPM graph and
427 * don't interface with the outside world or application layer
428 * we don't have to do any special handling on close.
432 #ifdef CONFIG_PM_SLEEP
433 /* powers down audio subsystem for suspend */
434 int snd_soc_suspend(struct device *dev)
436 struct snd_soc_card *card = dev_get_drvdata(dev);
437 struct snd_soc_component *component;
438 struct snd_soc_pcm_runtime *rtd;
441 /* If the card is not initialized yet there is nothing to do */
442 if (!card->instantiated)
445 /* Due to the resume being scheduled into a workqueue we could
446 * suspend before that's finished - wait for it to complete.
448 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
450 /* we're going to block userspace touching us until resume completes */
451 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
453 /* mute any active DACs */
454 list_for_each_entry(rtd, &card->rtd_list, list) {
456 if (rtd->dai_link->ignore_suspend)
459 for (i = 0; i < rtd->num_codecs; i++) {
460 struct snd_soc_dai *dai = rtd->codec_dais[i];
461 struct snd_soc_dai_driver *drv = dai->driver;
463 if (drv->ops->digital_mute && dai->playback_active)
464 drv->ops->digital_mute(dai, 1);
468 /* suspend all pcms */
469 list_for_each_entry(rtd, &card->rtd_list, list) {
470 if (rtd->dai_link->ignore_suspend)
473 snd_pcm_suspend_all(rtd->pcm);
476 if (card->suspend_pre)
477 card->suspend_pre(card);
479 list_for_each_entry(rtd, &card->rtd_list, list) {
480 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
482 if (rtd->dai_link->ignore_suspend)
485 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
486 cpu_dai->driver->suspend(cpu_dai);
489 /* close any waiting streams */
490 list_for_each_entry(rtd, &card->rtd_list, list)
491 flush_delayed_work(&rtd->delayed_work);
493 list_for_each_entry(rtd, &card->rtd_list, list) {
495 if (rtd->dai_link->ignore_suspend)
498 snd_soc_dapm_stream_event(rtd,
499 SNDRV_PCM_STREAM_PLAYBACK,
500 SND_SOC_DAPM_STREAM_SUSPEND);
502 snd_soc_dapm_stream_event(rtd,
503 SNDRV_PCM_STREAM_CAPTURE,
504 SND_SOC_DAPM_STREAM_SUSPEND);
507 /* Recheck all endpoints too, their state is affected by suspend */
508 dapm_mark_endpoints_dirty(card);
509 snd_soc_dapm_sync(&card->dapm);
511 /* suspend all COMPONENTs */
512 list_for_each_entry(component, &card->component_dev_list, card_list) {
513 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
515 /* If there are paths active then the COMPONENT will be held with
516 * bias _ON and should not be suspended. */
517 if (!component->suspended) {
518 switch (snd_soc_dapm_get_bias_level(dapm)) {
519 case SND_SOC_BIAS_STANDBY:
521 * If the COMPONENT is capable of idle
522 * bias off then being in STANDBY
523 * means it's doing something,
524 * otherwise fall through.
526 if (dapm->idle_bias_off) {
527 dev_dbg(component->dev,
528 "ASoC: idle_bias_off CODEC on over suspend\n");
533 case SND_SOC_BIAS_OFF:
534 if (component->driver->suspend)
535 component->driver->suspend(component);
536 component->suspended = 1;
537 if (component->regmap)
538 regcache_mark_dirty(component->regmap);
539 /* deactivate pins to sleep state */
540 pinctrl_pm_select_sleep_state(component->dev);
543 dev_dbg(component->dev,
544 "ASoC: COMPONENT is on over suspend\n");
550 list_for_each_entry(rtd, &card->rtd_list, list) {
551 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
553 if (rtd->dai_link->ignore_suspend)
556 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
557 cpu_dai->driver->suspend(cpu_dai);
559 /* deactivate pins to sleep state */
560 pinctrl_pm_select_sleep_state(cpu_dai->dev);
563 if (card->suspend_post)
564 card->suspend_post(card);
568 EXPORT_SYMBOL_GPL(snd_soc_suspend);
570 /* deferred resume work, so resume can complete before we finished
571 * setting our codec back up, which can be very slow on I2C
573 static void soc_resume_deferred(struct work_struct *work)
575 struct snd_soc_card *card =
576 container_of(work, struct snd_soc_card, deferred_resume_work);
577 struct snd_soc_pcm_runtime *rtd;
578 struct snd_soc_component *component;
581 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
582 * so userspace apps are blocked from touching us
585 dev_dbg(card->dev, "ASoC: starting resume work\n");
587 /* Bring us up into D2 so that DAPM starts enabling things */
588 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
590 if (card->resume_pre)
591 card->resume_pre(card);
593 /* resume control bus DAIs */
594 list_for_each_entry(rtd, &card->rtd_list, list) {
595 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
597 if (rtd->dai_link->ignore_suspend)
600 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
601 cpu_dai->driver->resume(cpu_dai);
604 list_for_each_entry(component, &card->component_dev_list, card_list) {
605 if (component->suspended) {
606 if (component->driver->resume)
607 component->driver->resume(component);
608 component->suspended = 0;
612 list_for_each_entry(rtd, &card->rtd_list, list) {
614 if (rtd->dai_link->ignore_suspend)
617 snd_soc_dapm_stream_event(rtd,
618 SNDRV_PCM_STREAM_PLAYBACK,
619 SND_SOC_DAPM_STREAM_RESUME);
621 snd_soc_dapm_stream_event(rtd,
622 SNDRV_PCM_STREAM_CAPTURE,
623 SND_SOC_DAPM_STREAM_RESUME);
626 /* unmute any active DACs */
627 list_for_each_entry(rtd, &card->rtd_list, list) {
629 if (rtd->dai_link->ignore_suspend)
632 for (i = 0; i < rtd->num_codecs; i++) {
633 struct snd_soc_dai *dai = rtd->codec_dais[i];
634 struct snd_soc_dai_driver *drv = dai->driver;
636 if (drv->ops->digital_mute && dai->playback_active)
637 drv->ops->digital_mute(dai, 0);
641 list_for_each_entry(rtd, &card->rtd_list, list) {
642 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
644 if (rtd->dai_link->ignore_suspend)
647 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
648 cpu_dai->driver->resume(cpu_dai);
651 if (card->resume_post)
652 card->resume_post(card);
654 dev_dbg(card->dev, "ASoC: resume work completed\n");
656 /* Recheck all endpoints too, their state is affected by suspend */
657 dapm_mark_endpoints_dirty(card);
658 snd_soc_dapm_sync(&card->dapm);
660 /* userspace can access us now we are back as we were before */
661 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
664 /* powers up audio subsystem after a suspend */
665 int snd_soc_resume(struct device *dev)
667 struct snd_soc_card *card = dev_get_drvdata(dev);
668 bool bus_control = false;
669 struct snd_soc_pcm_runtime *rtd;
671 /* If the card is not initialized yet there is nothing to do */
672 if (!card->instantiated)
675 /* activate pins from sleep state */
676 list_for_each_entry(rtd, &card->rtd_list, list) {
677 struct snd_soc_dai **codec_dais = rtd->codec_dais;
678 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
682 pinctrl_pm_select_default_state(cpu_dai->dev);
684 for (j = 0; j < rtd->num_codecs; j++) {
685 struct snd_soc_dai *codec_dai = codec_dais[j];
686 if (codec_dai->active)
687 pinctrl_pm_select_default_state(codec_dai->dev);
692 * DAIs that also act as the control bus master might have other drivers
693 * hanging off them so need to resume immediately. Other drivers don't
694 * have that problem and may take a substantial amount of time to resume
695 * due to I/O costs and anti-pop so handle them out of line.
697 list_for_each_entry(rtd, &card->rtd_list, list) {
698 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
699 bus_control |= cpu_dai->driver->bus_control;
702 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
703 soc_resume_deferred(&card->deferred_resume_work);
705 dev_dbg(dev, "ASoC: Scheduling resume work\n");
706 if (!schedule_work(&card->deferred_resume_work))
707 dev_err(dev, "ASoC: resume work item may be lost\n");
712 EXPORT_SYMBOL_GPL(snd_soc_resume);
714 #define snd_soc_suspend NULL
715 #define snd_soc_resume NULL
718 static const struct snd_soc_dai_ops null_dai_ops = {
721 static struct snd_soc_component *soc_find_component(
722 const struct device_node *of_node, const char *name)
724 struct snd_soc_component *component;
726 lockdep_assert_held(&client_mutex);
728 list_for_each_entry(component, &component_list, list) {
730 if (component->dev->of_node == of_node)
732 } else if (strcmp(component->name, name) == 0) {
741 * snd_soc_find_dai - Find a registered DAI
743 * @dlc: name of the DAI or the DAI driver and optional component info to match
745 * This function will search all registered components and their DAIs to
746 * find the DAI of the same name. The component's of_node and name
747 * should also match if being specified.
749 * Return: pointer of DAI, or NULL if not found.
751 struct snd_soc_dai *snd_soc_find_dai(
752 const struct snd_soc_dai_link_component *dlc)
754 struct snd_soc_component *component;
755 struct snd_soc_dai *dai;
756 struct device_node *component_of_node;
758 lockdep_assert_held(&client_mutex);
760 /* Find CPU DAI from registered DAIs*/
761 list_for_each_entry(component, &component_list, list) {
762 component_of_node = component->dev->of_node;
763 if (!component_of_node && component->dev->parent)
764 component_of_node = component->dev->parent->of_node;
766 if (dlc->of_node && component_of_node != dlc->of_node)
768 if (dlc->name && strcmp(component->name, dlc->name))
770 list_for_each_entry(dai, &component->dai_list, list) {
771 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
772 && (!dai->driver->name
773 || strcmp(dai->driver->name, dlc->dai_name)))
782 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
786 * snd_soc_find_dai_link - Find a DAI link
789 * @id: DAI link ID to match
790 * @name: DAI link name to match, optional
791 * @stream_name: DAI link stream name to match, optional
793 * This function will search all existing DAI links of the soc card to
794 * find the link of the same ID. Since DAI links may not have their
795 * unique ID, so name and stream name should also match if being
798 * Return: pointer of DAI link, or NULL if not found.
800 struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
801 int id, const char *name,
802 const char *stream_name)
804 struct snd_soc_dai_link *link, *_link;
806 lockdep_assert_held(&client_mutex);
808 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
812 if (name && (!link->name || strcmp(name, link->name)))
815 if (stream_name && (!link->stream_name
816 || strcmp(stream_name, link->stream_name)))
824 EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);
826 static bool soc_is_dai_link_bound(struct snd_soc_card *card,
827 struct snd_soc_dai_link *dai_link)
829 struct snd_soc_pcm_runtime *rtd;
831 list_for_each_entry(rtd, &card->rtd_list, list) {
832 if (rtd->dai_link == dai_link)
839 static int soc_bind_dai_link(struct snd_soc_card *card,
840 struct snd_soc_dai_link *dai_link)
842 struct snd_soc_pcm_runtime *rtd;
843 struct snd_soc_dai_link_component *codecs = dai_link->codecs;
844 struct snd_soc_dai_link_component cpu_dai_component;
845 struct snd_soc_component *component;
846 struct snd_soc_dai **codec_dais;
847 struct device_node *platform_of_node;
848 const char *platform_name;
851 if (dai_link->ignore)
854 dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
856 if (soc_is_dai_link_bound(card, dai_link)) {
857 dev_dbg(card->dev, "ASoC: dai link %s already bound\n",
862 rtd = soc_new_pcm_runtime(card, dai_link);
866 cpu_dai_component.name = dai_link->cpu_name;
867 cpu_dai_component.of_node = dai_link->cpu_of_node;
868 cpu_dai_component.dai_name = dai_link->cpu_dai_name;
869 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
871 dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
872 dai_link->cpu_dai_name);
875 snd_soc_rtdcom_add(rtd, rtd->cpu_dai->component);
877 rtd->num_codecs = dai_link->num_codecs;
879 /* Find CODEC from registered CODECs */
880 codec_dais = rtd->codec_dais;
881 for (i = 0; i < rtd->num_codecs; i++) {
882 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
883 if (!codec_dais[i]) {
884 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
888 snd_soc_rtdcom_add(rtd, codec_dais[i]->component);
891 /* Single codec links expect codec and codec_dai in runtime data */
892 rtd->codec_dai = codec_dais[0];
894 /* if there's no platform we match on the empty platform */
895 platform_name = dai_link->platform_name;
896 if (!platform_name && !dai_link->platform_of_node)
897 platform_name = "snd-soc-dummy";
899 /* find one from the set of registered platforms */
900 list_for_each_entry(component, &component_list, list) {
901 platform_of_node = component->dev->of_node;
902 if (!platform_of_node && component->dev->parent->of_node)
903 platform_of_node = component->dev->parent->of_node;
905 if (dai_link->platform_of_node) {
906 if (platform_of_node != dai_link->platform_of_node)
909 if (strcmp(component->name, platform_name))
913 snd_soc_rtdcom_add(rtd, component);
916 soc_add_pcm_runtime(card, rtd);
920 soc_free_pcm_runtime(rtd);
921 return -EPROBE_DEFER;
924 static void soc_remove_component(struct snd_soc_component *component)
926 if (!component->card)
929 list_del(&component->card_list);
931 if (component->driver->remove)
932 component->driver->remove(component);
934 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
936 soc_cleanup_component_debugfs(component);
937 component->card = NULL;
938 module_put(component->dev->driver->owner);
941 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
945 if (dai && dai->probed &&
946 dai->driver->remove_order == order) {
947 if (dai->driver->remove) {
948 err = dai->driver->remove(dai);
951 "ASoC: failed to remove %s: %d\n",
958 static void soc_remove_link_dais(struct snd_soc_card *card,
959 struct snd_soc_pcm_runtime *rtd, int order)
963 /* unregister the rtd device */
964 if (rtd->dev_registered) {
965 device_unregister(rtd->dev);
966 rtd->dev_registered = 0;
969 /* remove the CODEC DAI */
970 for (i = 0; i < rtd->num_codecs; i++)
971 soc_remove_dai(rtd->codec_dais[i], order);
973 soc_remove_dai(rtd->cpu_dai, order);
976 static void soc_remove_link_components(struct snd_soc_card *card,
977 struct snd_soc_pcm_runtime *rtd, int order)
979 struct snd_soc_component *component;
980 struct snd_soc_rtdcom_list *rtdcom;
982 for_each_rtdcom(rtd, rtdcom) {
983 component = rtdcom->component;
985 if (component->driver->remove_order == order)
986 soc_remove_component(component);
990 static void soc_remove_dai_links(struct snd_soc_card *card)
993 struct snd_soc_pcm_runtime *rtd;
994 struct snd_soc_dai_link *link, *_link;
996 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
998 list_for_each_entry(rtd, &card->rtd_list, list)
999 soc_remove_link_dais(card, rtd, order);
1002 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1004 list_for_each_entry(rtd, &card->rtd_list, list)
1005 soc_remove_link_components(card, rtd, order);
1008 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1009 if (link->dobj.type == SND_SOC_DOBJ_DAI_LINK)
1010 dev_warn(card->dev, "Topology forgot to remove link %s?\n",
1013 list_del(&link->list);
1014 card->num_dai_links--;
1018 static int snd_soc_init_multicodec(struct snd_soc_card *card,
1019 struct snd_soc_dai_link *dai_link)
1021 /* Legacy codec/codec_dai link is a single entry in multicodec */
1022 if (dai_link->codec_name || dai_link->codec_of_node ||
1023 dai_link->codec_dai_name) {
1024 dai_link->num_codecs = 1;
1026 dai_link->codecs = devm_kzalloc(card->dev,
1027 sizeof(struct snd_soc_dai_link_component),
1029 if (!dai_link->codecs)
1032 dai_link->codecs[0].name = dai_link->codec_name;
1033 dai_link->codecs[0].of_node = dai_link->codec_of_node;
1034 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
1037 if (!dai_link->codecs) {
1038 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
1045 static int soc_init_dai_link(struct snd_soc_card *card,
1046 struct snd_soc_dai_link *link)
1050 ret = snd_soc_init_multicodec(card, link);
1052 dev_err(card->dev, "ASoC: failed to init multicodec\n");
1056 for (i = 0; i < link->num_codecs; i++) {
1058 * Codec must be specified by 1 of name or OF node,
1059 * not both or neither.
1061 if (!!link->codecs[i].name ==
1062 !!link->codecs[i].of_node) {
1063 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
1067 /* Codec DAI name must be specified */
1068 if (!link->codecs[i].dai_name) {
1069 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
1076 * Platform may be specified by either name or OF node, but
1077 * can be left unspecified, and a dummy platform will be used.
1079 if (link->platform_name && link->platform_of_node) {
1081 "ASoC: Both platform name/of_node are set for %s\n",
1087 * CPU device may be specified by either name or OF node, but
1088 * can be left unspecified, and will be matched based on DAI
1091 if (link->cpu_name && link->cpu_of_node) {
1093 "ASoC: Neither/both cpu name/of_node are set for %s\n",
1098 * At least one of CPU DAI name or CPU device name/node must be
1101 if (!link->cpu_dai_name &&
1102 !(link->cpu_name || link->cpu_of_node)) {
1104 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
1112 void snd_soc_disconnect_sync(struct device *dev)
1114 struct snd_soc_component *component = snd_soc_lookup_component(dev, NULL);
1116 if (!component || !component->card)
1119 snd_card_disconnect_sync(component->card->snd_card);
1121 EXPORT_SYMBOL_GPL(snd_soc_disconnect_sync);
1124 * snd_soc_add_dai_link - Add a DAI link dynamically
1125 * @card: The ASoC card to which the DAI link is added
1126 * @dai_link: The new DAI link to add
1128 * This function adds a DAI link to the ASoC card's link list.
1130 * Note: Topology can use this API to add DAI links when probing the
1131 * topology component. And machine drivers can still define static
1132 * DAI links in dai_link array.
1134 int snd_soc_add_dai_link(struct snd_soc_card *card,
1135 struct snd_soc_dai_link *dai_link)
1137 if (dai_link->dobj.type
1138 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1139 dev_err(card->dev, "Invalid dai link type %d\n",
1140 dai_link->dobj.type);
1144 lockdep_assert_held(&client_mutex);
1145 /* Notify the machine driver for extra initialization
1146 * on the link created by topology.
1148 if (dai_link->dobj.type && card->add_dai_link)
1149 card->add_dai_link(card, dai_link);
1151 list_add_tail(&dai_link->list, &card->dai_link_list);
1152 card->num_dai_links++;
1156 EXPORT_SYMBOL_GPL(snd_soc_add_dai_link);
1159 * snd_soc_remove_dai_link - Remove a DAI link from the list
1160 * @card: The ASoC card that owns the link
1161 * @dai_link: The DAI link to remove
1163 * This function removes a DAI link from the ASoC card's link list.
1165 * For DAI links previously added by topology, topology should
1166 * remove them by using the dobj embedded in the link.
1168 void snd_soc_remove_dai_link(struct snd_soc_card *card,
1169 struct snd_soc_dai_link *dai_link)
1171 struct snd_soc_dai_link *link, *_link;
1173 if (dai_link->dobj.type
1174 && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
1175 dev_err(card->dev, "Invalid dai link type %d\n",
1176 dai_link->dobj.type);
1180 lockdep_assert_held(&client_mutex);
1181 /* Notify the machine driver for extra destruction
1182 * on the link created by topology.
1184 if (dai_link->dobj.type && card->remove_dai_link)
1185 card->remove_dai_link(card, dai_link);
1187 list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
1188 if (link == dai_link) {
1189 list_del(&link->list);
1190 card->num_dai_links--;
1195 EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);
1197 static void soc_set_of_name_prefix(struct snd_soc_component *component)
1199 struct device_node *component_of_node = component->dev->of_node;
1203 if (!component_of_node && component->dev->parent)
1204 component_of_node = component->dev->parent->of_node;
1206 ret = of_property_read_string(component_of_node, "sound-name-prefix",
1209 component->name_prefix = str;
1212 static void soc_set_name_prefix(struct snd_soc_card *card,
1213 struct snd_soc_component *component)
1217 for (i = 0; i < card->num_configs && card->codec_conf; i++) {
1218 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1219 struct device_node *component_of_node = component->dev->of_node;
1221 if (!component_of_node && component->dev->parent)
1222 component_of_node = component->dev->parent->of_node;
1224 if (map->of_node && component_of_node != map->of_node)
1226 if (map->dev_name && strcmp(component->name, map->dev_name))
1228 component->name_prefix = map->name_prefix;
1233 * If there is no configuration table or no match in the table,
1234 * check if a prefix is provided in the node
1236 soc_set_of_name_prefix(component);
1239 static int soc_probe_component(struct snd_soc_card *card,
1240 struct snd_soc_component *component)
1242 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1243 struct snd_soc_dai *dai;
1246 if (!strcmp(component->name, "snd-soc-dummy"))
1249 if (component->card) {
1250 if (component->card != card) {
1251 dev_err(component->dev,
1252 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1253 card->name, component->card->name);
1259 if (!try_module_get(component->dev->driver->owner))
1262 component->card = card;
1264 soc_set_name_prefix(card, component);
1266 soc_init_component_debugfs(component);
1268 if (component->driver->dapm_widgets) {
1269 ret = snd_soc_dapm_new_controls(dapm,
1270 component->driver->dapm_widgets,
1271 component->driver->num_dapm_widgets);
1274 dev_err(component->dev,
1275 "Failed to create new controls %d\n", ret);
1280 list_for_each_entry(dai, &component->dai_list, list) {
1281 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1283 dev_err(component->dev,
1284 "Failed to create DAI widgets %d\n", ret);
1289 if (component->driver->probe) {
1290 ret = component->driver->probe(component);
1292 dev_err(component->dev,
1293 "ASoC: failed to probe component %d\n", ret);
1297 WARN(dapm->idle_bias_off &&
1298 dapm->bias_level != SND_SOC_BIAS_OFF,
1299 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1303 /* machine specific init */
1304 if (component->init) {
1305 ret = component->init(component);
1307 dev_err(component->dev,
1308 "Failed to do machine specific init %d\n", ret);
1313 if (component->driver->controls)
1314 snd_soc_add_component_controls(component,
1315 component->driver->controls,
1316 component->driver->num_controls);
1317 if (component->driver->dapm_routes)
1318 snd_soc_dapm_add_routes(dapm,
1319 component->driver->dapm_routes,
1320 component->driver->num_dapm_routes);
1322 list_add(&dapm->list, &card->dapm_list);
1323 list_add(&component->card_list, &card->component_dev_list);
1328 soc_cleanup_component_debugfs(component);
1329 component->card = NULL;
1330 module_put(component->dev->driver->owner);
1335 static void rtd_release(struct device *dev)
1340 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1345 /* register the rtd device */
1346 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1349 device_initialize(rtd->dev);
1350 rtd->dev->parent = rtd->card->dev;
1351 rtd->dev->release = rtd_release;
1352 rtd->dev->groups = soc_dev_attr_groups;
1353 dev_set_name(rtd->dev, "%s", name);
1354 dev_set_drvdata(rtd->dev, rtd);
1355 mutex_init(&rtd->pcm_mutex);
1356 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1357 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1358 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1359 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1360 ret = device_add(rtd->dev);
1362 /* calling put_device() here to free the rtd->dev */
1363 put_device(rtd->dev);
1364 dev_err(rtd->card->dev,
1365 "ASoC: failed to register runtime device: %d\n", ret);
1368 rtd->dev_registered = 1;
1372 static int soc_probe_link_components(struct snd_soc_card *card,
1373 struct snd_soc_pcm_runtime *rtd,
1376 struct snd_soc_component *component;
1377 struct snd_soc_rtdcom_list *rtdcom;
1380 for_each_rtdcom(rtd, rtdcom) {
1381 component = rtdcom->component;
1383 if (component->driver->probe_order == order) {
1384 ret = soc_probe_component(card, component);
1393 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1396 dai->driver->probe_order != order)
1399 if (dai->driver->probe) {
1400 int ret = dai->driver->probe(dai);
1402 dev_err(dai->dev, "ASoC: failed to probe DAI %s: %d\n",
1413 static int soc_link_dai_pcm_new(struct snd_soc_dai **dais, int num_dais,
1414 struct snd_soc_pcm_runtime *rtd)
1418 for (i = 0; i < num_dais; ++i) {
1419 struct snd_soc_dai_driver *drv = dais[i]->driver;
1421 if (!rtd->dai_link->no_pcm && drv->pcm_new)
1422 ret = drv->pcm_new(rtd, dais[i]);
1424 dev_err(dais[i]->dev,
1425 "ASoC: Failed to bind %s with pcm device\n",
1434 static int soc_link_dai_widgets(struct snd_soc_card *card,
1435 struct snd_soc_dai_link *dai_link,
1436 struct snd_soc_pcm_runtime *rtd)
1438 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1439 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1440 struct snd_soc_dapm_widget *sink, *source;
1443 if (rtd->num_codecs > 1)
1444 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1446 /* link the DAI widgets */
1447 sink = codec_dai->playback_widget;
1448 source = cpu_dai->capture_widget;
1449 if (sink && source) {
1450 ret = snd_soc_dapm_new_pcm(card, rtd, dai_link->params,
1451 dai_link->num_params,
1454 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1455 sink->name, source->name, ret);
1460 sink = cpu_dai->playback_widget;
1461 source = codec_dai->capture_widget;
1462 if (sink && source) {
1463 ret = snd_soc_dapm_new_pcm(card, rtd, dai_link->params,
1464 dai_link->num_params,
1467 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1468 sink->name, source->name, ret);
1476 static int soc_probe_link_dais(struct snd_soc_card *card,
1477 struct snd_soc_pcm_runtime *rtd, int order)
1479 struct snd_soc_dai_link *dai_link = rtd->dai_link;
1480 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1481 struct snd_soc_rtdcom_list *rtdcom;
1482 struct snd_soc_component *component;
1485 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1486 card->name, rtd->num, order);
1488 /* set default power off timeout */
1489 rtd->pmdown_time = pmdown_time;
1491 ret = soc_probe_dai(cpu_dai, order);
1495 /* probe the CODEC DAI */
1496 for (i = 0; i < rtd->num_codecs; i++) {
1497 ret = soc_probe_dai(rtd->codec_dais[i], order);
1502 /* complete DAI probe during last probe */
1503 if (order != SND_SOC_COMP_ORDER_LAST)
1506 /* do machine specific initialization */
1507 if (dai_link->init) {
1508 ret = dai_link->init(rtd);
1510 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1511 dai_link->name, ret);
1516 if (dai_link->dai_fmt)
1517 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1519 ret = soc_post_component_init(rtd, dai_link->name);
1523 #ifdef CONFIG_DEBUG_FS
1524 /* add DPCM sysfs entries */
1525 if (dai_link->dynamic)
1526 soc_dpcm_debugfs_add(rtd);
1532 * most drivers will register their PCMs using DAI link ordering but
1533 * topology based drivers can use the DAI link id field to set PCM
1534 * device number and then use rtd + a base offset of the BEs.
1536 for_each_rtdcom(rtd, rtdcom) {
1537 component = rtdcom->component;
1539 if (!component->driver->use_dai_pcm_id)
1542 if (rtd->dai_link->no_pcm)
1543 num += component->driver->be_pcm_base;
1545 num = rtd->dai_link->id;
1548 if (cpu_dai->driver->compress_new) {
1549 /*create compress_device"*/
1550 ret = cpu_dai->driver->compress_new(rtd, num);
1552 dev_err(card->dev, "ASoC: can't create compress %s\n",
1553 dai_link->stream_name);
1558 if (!dai_link->params) {
1559 /* create the pcm */
1560 ret = soc_new_pcm(rtd, num);
1562 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1563 dai_link->stream_name, ret);
1566 ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd);
1569 ret = soc_link_dai_pcm_new(rtd->codec_dais,
1570 rtd->num_codecs, rtd);
1574 INIT_DELAYED_WORK(&rtd->delayed_work,
1575 codec2codec_close_delayed_work);
1577 /* link the DAI widgets */
1578 ret = soc_link_dai_widgets(card, dai_link, rtd);
1587 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1589 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1590 struct snd_soc_component *component;
1592 struct device_node *codec_of_node;
1594 if (aux_dev->codec_of_node || aux_dev->codec_name) {
1595 /* codecs, usually analog devices */
1596 name = aux_dev->codec_name;
1597 codec_of_node = aux_dev->codec_of_node;
1598 component = soc_find_component(codec_of_node, name);
1601 name = of_node_full_name(codec_of_node);
1604 } else if (aux_dev->name) {
1605 /* generic components */
1606 name = aux_dev->name;
1607 component = soc_find_component(NULL, name);
1611 dev_err(card->dev, "ASoC: Invalid auxiliary device\n");
1615 component->init = aux_dev->init;
1616 list_add(&component->card_aux_list, &card->aux_comp_list);
1621 dev_err(card->dev, "ASoC: %s not registered\n", name);
1622 return -EPROBE_DEFER;
1625 static int soc_probe_aux_devices(struct snd_soc_card *card)
1627 struct snd_soc_component *comp;
1631 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1633 list_for_each_entry(comp, &card->aux_comp_list, card_aux_list) {
1634 if (comp->driver->probe_order == order) {
1635 ret = soc_probe_component(card, comp);
1638 "ASoC: failed to probe aux component %s %d\n",
1649 static void soc_remove_aux_devices(struct snd_soc_card *card)
1651 struct snd_soc_component *comp, *_comp;
1654 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1656 list_for_each_entry_safe(comp, _comp,
1657 &card->aux_comp_list, card_aux_list) {
1659 if (comp->driver->remove_order == order) {
1660 soc_remove_component(comp);
1661 /* remove it from the card's aux_comp_list */
1662 list_del(&comp->card_aux_list);
1669 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1670 * @rtd: The runtime for which the DAI link format should be changed
1671 * @dai_fmt: The new DAI link format
1673 * This function updates the DAI link format for all DAIs connected to the DAI
1674 * link for the specified runtime.
1676 * Note: For setups with a static format set the dai_fmt field in the
1677 * corresponding snd_dai_link struct instead of using this function.
1679 * Returns 0 on success, otherwise a negative error code.
1681 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1682 unsigned int dai_fmt)
1684 struct snd_soc_dai **codec_dais = rtd->codec_dais;
1685 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1689 for (i = 0; i < rtd->num_codecs; i++) {
1690 struct snd_soc_dai *codec_dai = codec_dais[i];
1692 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1693 if (ret != 0 && ret != -ENOTSUPP) {
1694 dev_warn(codec_dai->dev,
1695 "ASoC: Failed to set DAI format: %d\n", ret);
1700 /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1701 /* the component which has non_legacy_dai_naming is Codec */
1702 if (cpu_dai->component->driver->non_legacy_dai_naming) {
1703 unsigned int inv_dai_fmt;
1705 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1706 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1707 case SND_SOC_DAIFMT_CBM_CFM:
1708 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1710 case SND_SOC_DAIFMT_CBM_CFS:
1711 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1713 case SND_SOC_DAIFMT_CBS_CFM:
1714 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1716 case SND_SOC_DAIFMT_CBS_CFS:
1717 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1721 dai_fmt = inv_dai_fmt;
1724 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1725 if (ret != 0 && ret != -ENOTSUPP) {
1726 dev_warn(cpu_dai->dev,
1727 "ASoC: Failed to set DAI format: %d\n", ret);
1733 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1737 /* Trim special characters, and replace '-' with '_' since '-' is used to
1738 * separate different DMI fields in the card long name. Only number and
1739 * alphabet characters and a few separator characters are kept.
1741 static void cleanup_dmi_name(char *name)
1745 for (i = 0; name[i]; i++) {
1746 if (isalnum(name[i]) || (name[i] == '.')
1747 || (name[i] == '_'))
1748 name[j++] = name[i];
1749 else if (name[i] == '-')
1756 /* Check if a DMI field is valid, i.e. not containing any string
1757 * in the black list.
1759 static int is_dmi_valid(const char *field)
1763 while (dmi_blacklist[i]) {
1764 if (strstr(field, dmi_blacklist[i]))
1773 * snd_soc_set_dmi_name() - Register DMI names to card
1774 * @card: The card to register DMI names
1775 * @flavour: The flavour "differentiator" for the card amongst its peers.
1777 * An Intel machine driver may be used by many different devices but are
1778 * difficult for userspace to differentiate, since machine drivers ususally
1779 * use their own name as the card short name and leave the card long name
1780 * blank. To differentiate such devices and fix bugs due to lack of
1781 * device-specific configurations, this function allows DMI info to be used
1782 * as the sound card long name, in the format of
1783 * "vendor-product-version-board"
1784 * (Character '-' is used to separate different DMI fields here).
1785 * This will help the user space to load the device-specific Use Case Manager
1786 * (UCM) configurations for the card.
1788 * Possible card long names may be:
1789 * DellInc.-XPS139343-01-0310JH
1790 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1791 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1793 * This function also supports flavoring the card longname to provide
1794 * the extra differentiation, like "vendor-product-version-board-flavor".
1796 * We only keep number and alphabet characters and a few separator characters
1797 * in the card long name since UCM in the user space uses the card long names
1798 * as card configuration directory names and AudoConf cannot support special
1799 * charactors like SPACE.
1801 * Returns 0 on success, otherwise a negative error code.
1803 int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1805 const char *vendor, *product, *product_version, *board;
1806 size_t longname_buf_size = sizeof(card->snd_card->longname);
1809 if (card->long_name)
1810 return 0; /* long name already set by driver or from DMI */
1812 /* make up dmi long name as: vendor.product.version.board */
1813 vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1814 if (!vendor || !is_dmi_valid(vendor)) {
1815 dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1820 snprintf(card->dmi_longname, sizeof(card->snd_card->longname),
1822 cleanup_dmi_name(card->dmi_longname);
1824 product = dmi_get_system_info(DMI_PRODUCT_NAME);
1825 if (product && is_dmi_valid(product)) {
1826 len = strlen(card->dmi_longname);
1827 snprintf(card->dmi_longname + len,
1828 longname_buf_size - len,
1831 len++; /* skip the separator "-" */
1832 if (len < longname_buf_size)
1833 cleanup_dmi_name(card->dmi_longname + len);
1835 /* some vendors like Lenovo may only put a self-explanatory
1836 * name in the product version field
1838 product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1839 if (product_version && is_dmi_valid(product_version)) {
1840 len = strlen(card->dmi_longname);
1841 snprintf(card->dmi_longname + len,
1842 longname_buf_size - len,
1843 "-%s", product_version);
1846 if (len < longname_buf_size)
1847 cleanup_dmi_name(card->dmi_longname + len);
1851 board = dmi_get_system_info(DMI_BOARD_NAME);
1852 if (board && is_dmi_valid(board)) {
1853 len = strlen(card->dmi_longname);
1854 snprintf(card->dmi_longname + len,
1855 longname_buf_size - len,
1859 if (len < longname_buf_size)
1860 cleanup_dmi_name(card->dmi_longname + len);
1861 } else if (!product) {
1862 /* fall back to using legacy name */
1863 dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1867 /* Add flavour to dmi long name */
1869 len = strlen(card->dmi_longname);
1870 snprintf(card->dmi_longname + len,
1871 longname_buf_size - len,
1875 if (len < longname_buf_size)
1876 cleanup_dmi_name(card->dmi_longname + len);
1879 /* set the card long name */
1880 card->long_name = card->dmi_longname;
1884 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1885 #endif /* CONFIG_DMI */
1887 static void soc_check_tplg_fes(struct snd_soc_card *card)
1889 struct snd_soc_component *component;
1890 const struct snd_soc_component_driver *comp_drv;
1891 struct snd_soc_dai_link *dai_link;
1894 list_for_each_entry(component, &component_list, list) {
1896 /* does this component override FEs ? */
1897 if (!component->driver->ignore_machine)
1900 /* for this machine ? */
1901 if (strcmp(component->driver->ignore_machine,
1902 card->dev->driver->name))
1905 /* machine matches, so override the rtd data */
1906 for (i = 0; i < card->num_links; i++) {
1908 dai_link = &card->dai_link[i];
1910 /* ignore this FE */
1911 if (dai_link->dynamic) {
1912 dai_link->ignore = true;
1916 dev_info(card->dev, "info: override FE DAI link %s\n",
1917 card->dai_link[i].name);
1919 /* override platform component */
1920 dai_link->platform_name = component->name;
1922 /* convert non BE into BE */
1923 dai_link->no_pcm = 1;
1925 /* override any BE fixups */
1926 dai_link->be_hw_params_fixup =
1927 component->driver->be_hw_params_fixup;
1929 /* most BE links don't set stream name, so set it to
1930 * dai link name if it's NULL to help bind widgets.
1932 if (!dai_link->stream_name)
1933 dai_link->stream_name = dai_link->name;
1936 /* Inform userspace we are using alternate topology */
1937 if (component->driver->topology_name_prefix) {
1939 /* topology shortname created ? */
1940 if (!card->topology_shortname_created) {
1941 comp_drv = component->driver;
1943 snprintf(card->topology_shortname, 32, "%s-%s",
1944 comp_drv->topology_name_prefix,
1946 card->topology_shortname_created = true;
1949 /* use topology shortname */
1950 card->name = card->topology_shortname;
1955 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1957 struct snd_soc_pcm_runtime *rtd;
1958 struct snd_soc_dai_link *dai_link;
1961 mutex_lock(&client_mutex);
1962 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1964 /* check whether any platform is ignore machine FE and using topology */
1965 soc_check_tplg_fes(card);
1968 for (i = 0; i < card->num_links; i++) {
1969 ret = soc_bind_dai_link(card, &card->dai_link[i]);
1974 /* bind aux_devs too */
1975 for (i = 0; i < card->num_aux_devs; i++) {
1976 ret = soc_bind_aux_dev(card, i);
1981 /* add predefined DAI links to the list */
1982 for (i = 0; i < card->num_links; i++)
1983 snd_soc_add_dai_link(card, card->dai_link+i);
1985 /* card bind complete so register a sound card */
1986 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1987 card->owner, 0, &card->snd_card);
1990 "ASoC: can't create sound card for card %s: %d\n",
1995 soc_init_card_debugfs(card);
1997 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1998 card->dapm.dev = card->dev;
1999 card->dapm.card = card;
2000 list_add(&card->dapm.list, &card->dapm_list);
2002 #ifdef CONFIG_DEBUG_FS
2003 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
2006 #ifdef CONFIG_PM_SLEEP
2007 /* deferred resume work */
2008 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
2011 if (card->dapm_widgets)
2012 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2013 card->num_dapm_widgets);
2015 if (card->of_dapm_widgets)
2016 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2017 card->num_of_dapm_widgets);
2019 /* initialise the sound card only once */
2021 ret = card->probe(card);
2023 goto card_probe_error;
2026 /* probe all components used by DAI links on this card */
2027 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
2029 list_for_each_entry(rtd, &card->rtd_list, list) {
2030 ret = soc_probe_link_components(card, rtd, order);
2033 "ASoC: failed to instantiate card %d\n",
2040 /* probe auxiliary components */
2041 ret = soc_probe_aux_devices(card);
2045 /* Find new DAI links added during probing components and bind them.
2046 * Components with topology may bring new DAIs and DAI links.
2048 list_for_each_entry(dai_link, &card->dai_link_list, list) {
2049 if (soc_is_dai_link_bound(card, dai_link))
2052 ret = soc_init_dai_link(card, dai_link);
2055 ret = soc_bind_dai_link(card, dai_link);
2060 /* probe all DAI links on this card */
2061 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
2063 list_for_each_entry(rtd, &card->rtd_list, list) {
2064 ret = soc_probe_link_dais(card, rtd, order);
2067 "ASoC: failed to instantiate card %d\n",
2074 snd_soc_dapm_link_dai_widgets(card);
2075 snd_soc_dapm_connect_dai_link_widgets(card);
2078 snd_soc_add_card_controls(card, card->controls, card->num_controls);
2080 if (card->dapm_routes)
2081 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2082 card->num_dapm_routes);
2084 if (card->of_dapm_routes)
2085 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2086 card->num_of_dapm_routes);
2088 /* try to set some sane longname if DMI is available */
2089 snd_soc_set_dmi_name(card, NULL);
2091 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
2093 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
2094 "%s", card->long_name ? card->long_name : card->name);
2095 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
2096 "%s", card->driver_name ? card->driver_name : card->name);
2097 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
2098 switch (card->snd_card->driver[i]) {
2104 if (!isalnum(card->snd_card->driver[i]))
2105 card->snd_card->driver[i] = '_';
2110 if (card->late_probe) {
2111 ret = card->late_probe(card);
2113 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2115 goto probe_aux_dev_err;
2119 snd_soc_dapm_new_widgets(card);
2121 ret = snd_card_register(card->snd_card);
2123 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2125 goto probe_aux_dev_err;
2128 card->instantiated = 1;
2129 snd_soc_dapm_sync(&card->dapm);
2130 mutex_unlock(&card->mutex);
2131 mutex_unlock(&client_mutex);
2136 soc_remove_aux_devices(card);
2139 soc_remove_dai_links(card);
2145 snd_soc_dapm_free(&card->dapm);
2146 soc_cleanup_card_debugfs(card);
2147 snd_card_free(card->snd_card);
2150 soc_remove_pcm_runtimes(card);
2151 mutex_unlock(&card->mutex);
2152 mutex_unlock(&client_mutex);
2157 /* probes a new socdev */
2158 static int soc_probe(struct platform_device *pdev)
2160 struct snd_soc_card *card = platform_get_drvdata(pdev);
2163 * no card, so machine driver should be registering card
2164 * we should not be here in that case so ret error
2169 dev_warn(&pdev->dev,
2170 "ASoC: machine %s should use snd_soc_register_card()\n",
2173 /* Bodge while we unpick instantiation */
2174 card->dev = &pdev->dev;
2176 return snd_soc_register_card(card);
2179 static int soc_cleanup_card_resources(struct snd_soc_card *card)
2181 struct snd_soc_pcm_runtime *rtd;
2183 /* make sure any delayed work runs */
2184 list_for_each_entry(rtd, &card->rtd_list, list)
2185 flush_delayed_work(&rtd->delayed_work);
2187 /* free the ALSA card at first; this syncs with pending operations */
2188 snd_card_free(card->snd_card);
2190 /* remove and free each DAI */
2191 soc_remove_dai_links(card);
2192 soc_remove_pcm_runtimes(card);
2194 /* remove auxiliary devices */
2195 soc_remove_aux_devices(card);
2197 snd_soc_dapm_free(&card->dapm);
2198 soc_cleanup_card_debugfs(card);
2200 /* remove the card */
2207 /* removes a socdev */
2208 static int soc_remove(struct platform_device *pdev)
2210 struct snd_soc_card *card = platform_get_drvdata(pdev);
2212 snd_soc_unregister_card(card);
2216 int snd_soc_poweroff(struct device *dev)
2218 struct snd_soc_card *card = dev_get_drvdata(dev);
2219 struct snd_soc_pcm_runtime *rtd;
2221 if (!card->instantiated)
2224 /* Flush out pmdown_time work - we actually do want to run it
2225 * now, we're shutting down so no imminent restart. */
2226 list_for_each_entry(rtd, &card->rtd_list, list)
2227 flush_delayed_work(&rtd->delayed_work);
2229 snd_soc_dapm_shutdown(card);
2231 /* deactivate pins to sleep state */
2232 list_for_each_entry(rtd, &card->rtd_list, list) {
2233 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2236 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2237 for (i = 0; i < rtd->num_codecs; i++) {
2238 struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
2239 pinctrl_pm_select_sleep_state(codec_dai->dev);
2245 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2247 const struct dev_pm_ops snd_soc_pm_ops = {
2248 .suspend = snd_soc_suspend,
2249 .resume = snd_soc_resume,
2250 .freeze = snd_soc_suspend,
2251 .thaw = snd_soc_resume,
2252 .poweroff = snd_soc_poweroff,
2253 .restore = snd_soc_resume,
2255 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2257 /* ASoC platform driver */
2258 static struct platform_driver soc_driver = {
2260 .name = "soc-audio",
2261 .pm = &snd_soc_pm_ops,
2264 .remove = soc_remove,
2268 * snd_soc_cnew - create new control
2269 * @_template: control template
2270 * @data: control private data
2271 * @long_name: control long name
2272 * @prefix: control name prefix
2274 * Create a new mixer control from a template control.
2276 * Returns 0 for success, else error.
2278 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2279 void *data, const char *long_name,
2282 struct snd_kcontrol_new template;
2283 struct snd_kcontrol *kcontrol;
2286 memcpy(&template, _template, sizeof(template));
2290 long_name = template.name;
2293 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2297 template.name = name;
2299 template.name = long_name;
2302 kcontrol = snd_ctl_new1(&template, data);
2308 EXPORT_SYMBOL_GPL(snd_soc_cnew);
2310 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2311 const struct snd_kcontrol_new *controls, int num_controls,
2312 const char *prefix, void *data)
2316 for (i = 0; i < num_controls; i++) {
2317 const struct snd_kcontrol_new *control = &controls[i];
2318 err = snd_ctl_add(card, snd_soc_cnew(control, data,
2319 control->name, prefix));
2321 dev_err(dev, "ASoC: Failed to add %s: %d\n",
2322 control->name, err);
2330 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2333 struct snd_card *card = soc_card->snd_card;
2334 struct snd_kcontrol *kctl;
2336 if (unlikely(!name))
2339 list_for_each_entry(kctl, &card->controls, list)
2340 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2344 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2347 * snd_soc_add_component_controls - Add an array of controls to a component.
2349 * @component: Component to add controls to
2350 * @controls: Array of controls to add
2351 * @num_controls: Number of elements in the array
2353 * Return: 0 for success, else error.
2355 int snd_soc_add_component_controls(struct snd_soc_component *component,
2356 const struct snd_kcontrol_new *controls, unsigned int num_controls)
2358 struct snd_card *card = component->card->snd_card;
2360 return snd_soc_add_controls(card, component->dev, controls,
2361 num_controls, component->name_prefix, component);
2363 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2366 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2367 * Convenience function to add a list of controls.
2369 * @soc_card: SoC card to add controls to
2370 * @controls: array of controls to add
2371 * @num_controls: number of elements in the array
2373 * Return 0 for success, else error.
2375 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2376 const struct snd_kcontrol_new *controls, int num_controls)
2378 struct snd_card *card = soc_card->snd_card;
2380 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2383 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2386 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2387 * Convienience function to add a list of controls.
2389 * @dai: DAI to add controls to
2390 * @controls: array of controls to add
2391 * @num_controls: number of elements in the array
2393 * Return 0 for success, else error.
2395 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2396 const struct snd_kcontrol_new *controls, int num_controls)
2398 struct snd_card *card = dai->component->card->snd_card;
2400 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2403 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2406 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2408 * @clk_id: DAI specific clock ID
2409 * @freq: new clock frequency in Hz
2410 * @dir: new clock direction - input/output.
2412 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2414 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2415 unsigned int freq, int dir)
2417 if (dai->driver->ops->set_sysclk)
2418 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2420 return snd_soc_component_set_sysclk(dai->component, clk_id, 0,
2423 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2426 * snd_soc_component_set_sysclk - configure COMPONENT system or master clock.
2427 * @component: COMPONENT
2428 * @clk_id: DAI specific clock ID
2429 * @source: Source for the clock
2430 * @freq: new clock frequency in Hz
2431 * @dir: new clock direction - input/output.
2433 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2435 int snd_soc_component_set_sysclk(struct snd_soc_component *component, int clk_id,
2436 int source, unsigned int freq, int dir)
2438 if (component->driver->set_sysclk)
2439 return component->driver->set_sysclk(component, clk_id, source,
2444 EXPORT_SYMBOL_GPL(snd_soc_component_set_sysclk);
2447 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2449 * @div_id: DAI specific clock divider ID
2450 * @div: new clock divisor.
2452 * Configures the clock dividers. This is used to derive the best DAI bit and
2453 * frame clocks from the system or master clock. It's best to set the DAI bit
2454 * and frame clocks as low as possible to save system power.
2456 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2457 int div_id, int div)
2459 if (dai->driver->ops->set_clkdiv)
2460 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2464 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2467 * snd_soc_dai_set_pll - configure DAI PLL.
2469 * @pll_id: DAI specific PLL ID
2470 * @source: DAI specific source for the PLL
2471 * @freq_in: PLL input clock frequency in Hz
2472 * @freq_out: requested PLL output clock frequency in Hz
2474 * Configures and enables PLL to generate output clock based on input clock.
2476 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2477 unsigned int freq_in, unsigned int freq_out)
2479 if (dai->driver->ops->set_pll)
2480 return dai->driver->ops->set_pll(dai, pll_id, source,
2483 return snd_soc_component_set_pll(dai->component, pll_id, source,
2486 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2489 * snd_soc_component_set_pll - configure component PLL.
2490 * @component: COMPONENT
2491 * @pll_id: DAI specific PLL ID
2492 * @source: DAI specific source for the PLL
2493 * @freq_in: PLL input clock frequency in Hz
2494 * @freq_out: requested PLL output clock frequency in Hz
2496 * Configures and enables PLL to generate output clock based on input clock.
2498 int snd_soc_component_set_pll(struct snd_soc_component *component, int pll_id,
2499 int source, unsigned int freq_in,
2500 unsigned int freq_out)
2502 if (component->driver->set_pll)
2503 return component->driver->set_pll(component, pll_id, source,
2508 EXPORT_SYMBOL_GPL(snd_soc_component_set_pll);
2511 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2513 * @ratio: Ratio of BCLK to Sample rate.
2515 * Configures the DAI for a preset BCLK to sample rate ratio.
2517 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2519 if (dai->driver->ops->set_bclk_ratio)
2520 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2524 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2527 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2529 * @fmt: SND_SOC_DAIFMT_* format value.
2531 * Configures the DAI hardware format and clocking.
2533 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2535 if (dai->driver == NULL)
2537 if (dai->driver->ops->set_fmt == NULL)
2539 return dai->driver->ops->set_fmt(dai, fmt);
2541 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2544 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2545 * @slots: Number of slots in use.
2546 * @tx_mask: bitmask representing active TX slots.
2547 * @rx_mask: bitmask representing active RX slots.
2549 * Generates the TDM tx and rx slot default masks for DAI.
2551 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2552 unsigned int *tx_mask,
2553 unsigned int *rx_mask)
2555 if (*tx_mask || *rx_mask)
2561 *tx_mask = (1 << slots) - 1;
2562 *rx_mask = (1 << slots) - 1;
2568 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2569 * @dai: The DAI to configure
2570 * @tx_mask: bitmask representing active TX slots.
2571 * @rx_mask: bitmask representing active RX slots.
2572 * @slots: Number of slots in use.
2573 * @slot_width: Width in bits for each slot.
2575 * This function configures the specified DAI for TDM operation. @slot contains
2576 * the total number of slots of the TDM stream and @slot_with the width of each
2577 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2578 * active slots of the TDM stream for the specified DAI, i.e. which slots the
2579 * DAI should write to or read from. If a bit is set the corresponding slot is
2580 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2581 * the first slot, bit 1 to the second slot and so on. The first active slot
2582 * maps to the first channel of the DAI, the second active slot to the second
2583 * channel and so on.
2585 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2586 * @rx_mask and @slot_width will be ignored.
2588 * Returns 0 on success, a negative error code otherwise.
2590 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2591 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2593 if (dai->driver->ops->xlate_tdm_slot_mask)
2594 dai->driver->ops->xlate_tdm_slot_mask(slots,
2595 &tx_mask, &rx_mask);
2597 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2599 dai->tx_mask = tx_mask;
2600 dai->rx_mask = rx_mask;
2602 if (dai->driver->ops->set_tdm_slot)
2603 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2608 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2611 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2613 * @tx_num: how many TX channels
2614 * @tx_slot: pointer to an array which imply the TX slot number channel
2616 * @rx_num: how many RX channels
2617 * @rx_slot: pointer to an array which imply the RX slot number channel
2620 * configure the relationship between channel number and TDM slot number.
2622 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2623 unsigned int tx_num, unsigned int *tx_slot,
2624 unsigned int rx_num, unsigned int *rx_slot)
2626 if (dai->driver->ops->set_channel_map)
2627 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2632 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2635 * snd_soc_dai_get_channel_map - Get DAI audio channel map
2637 * @tx_num: how many TX channels
2638 * @tx_slot: pointer to an array which imply the TX slot number channel
2640 * @rx_num: how many RX channels
2641 * @rx_slot: pointer to an array which imply the RX slot number channel
2644 int snd_soc_dai_get_channel_map(struct snd_soc_dai *dai,
2645 unsigned int *tx_num, unsigned int *tx_slot,
2646 unsigned int *rx_num, unsigned int *rx_slot)
2648 if (dai->driver->ops->get_channel_map)
2649 return dai->driver->ops->get_channel_map(dai, tx_num, tx_slot,
2654 EXPORT_SYMBOL_GPL(snd_soc_dai_get_channel_map);
2657 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2659 * @tristate: tristate enable
2661 * Tristates the DAI so that others can use it.
2663 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2665 if (dai->driver->ops->set_tristate)
2666 return dai->driver->ops->set_tristate(dai, tristate);
2670 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2673 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2675 * @mute: mute enable
2676 * @direction: stream to mute
2678 * Mutes the DAI DAC.
2680 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2686 if (dai->driver->ops->mute_stream)
2687 return dai->driver->ops->mute_stream(dai, mute, direction);
2688 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2689 dai->driver->ops->digital_mute)
2690 return dai->driver->ops->digital_mute(dai, mute);
2694 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2697 * snd_soc_register_card - Register a card with the ASoC core
2699 * @card: Card to register
2702 int snd_soc_register_card(struct snd_soc_card *card)
2705 struct snd_soc_pcm_runtime *rtd;
2707 if (!card->name || !card->dev)
2710 for (i = 0; i < card->num_links; i++) {
2711 struct snd_soc_dai_link *link = &card->dai_link[i];
2713 ret = soc_init_dai_link(card, link);
2715 dev_err(card->dev, "ASoC: failed to init link %s\n",
2721 dev_set_drvdata(card->dev, card);
2723 snd_soc_initialize_card_lists(card);
2725 INIT_LIST_HEAD(&card->dai_link_list);
2726 card->num_dai_links = 0;
2728 INIT_LIST_HEAD(&card->rtd_list);
2731 INIT_LIST_HEAD(&card->dapm_dirty);
2732 INIT_LIST_HEAD(&card->dobj_list);
2733 card->instantiated = 0;
2734 mutex_init(&card->mutex);
2735 mutex_init(&card->dapm_mutex);
2737 ret = snd_soc_instantiate_card(card);
2741 /* deactivate pins to sleep state */
2742 list_for_each_entry(rtd, &card->rtd_list, list) {
2743 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2746 for (j = 0; j < rtd->num_codecs; j++) {
2747 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2748 if (!codec_dai->active)
2749 pinctrl_pm_select_sleep_state(codec_dai->dev);
2752 if (!cpu_dai->active)
2753 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2758 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2761 * snd_soc_unregister_card - Unregister a card with the ASoC core
2763 * @card: Card to unregister
2766 int snd_soc_unregister_card(struct snd_soc_card *card)
2768 if (card->instantiated) {
2769 card->instantiated = false;
2770 snd_soc_dapm_shutdown(card);
2771 soc_cleanup_card_resources(card);
2772 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2777 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2780 * Simplify DAI link configuration by removing ".-1" from device names
2781 * and sanitizing names.
2783 static char *fmt_single_name(struct device *dev, int *id)
2785 char *found, name[NAME_SIZE];
2788 if (dev_name(dev) == NULL)
2791 strlcpy(name, dev_name(dev), NAME_SIZE);
2793 /* are we a "%s.%d" name (platform and SPI components) */
2794 found = strstr(name, dev->driver->name);
2797 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2799 /* discard ID from name if ID == -1 */
2801 found[strlen(dev->driver->name)] = '\0';
2805 /* I2C component devices are named "bus-addr" */
2806 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2807 char tmp[NAME_SIZE];
2809 /* create unique ID number from I2C addr and bus */
2810 *id = ((id1 & 0xffff) << 16) + id2;
2812 /* sanitize component name for DAI link creation */
2813 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2814 strlcpy(name, tmp, NAME_SIZE);
2819 return kstrdup(name, GFP_KERNEL);
2823 * Simplify DAI link naming for single devices with multiple DAIs by removing
2824 * any ".-1" and using the DAI name (instead of device name).
2826 static inline char *fmt_multiple_name(struct device *dev,
2827 struct snd_soc_dai_driver *dai_drv)
2829 if (dai_drv->name == NULL) {
2831 "ASoC: error - multiple DAI %s registered with no name\n",
2836 return kstrdup(dai_drv->name, GFP_KERNEL);
2840 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2842 * @component: The component for which the DAIs should be unregistered
2844 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2846 struct snd_soc_dai *dai, *_dai;
2848 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2849 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2851 list_del(&dai->list);
2857 /* Create a DAI and add it to the component's DAI list */
2858 static struct snd_soc_dai *soc_add_dai(struct snd_soc_component *component,
2859 struct snd_soc_dai_driver *dai_drv,
2860 bool legacy_dai_naming)
2862 struct device *dev = component->dev;
2863 struct snd_soc_dai *dai;
2865 dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2867 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2872 * Back in the old days when we still had component-less DAIs,
2873 * instead of having a static name, component-less DAIs would
2874 * inherit the name of the parent device so it is possible to
2875 * register multiple instances of the DAI. We still need to keep
2876 * the same naming style even though those DAIs are not
2877 * component-less anymore.
2879 if (legacy_dai_naming &&
2880 (dai_drv->id == 0 || dai_drv->name == NULL)) {
2881 dai->name = fmt_single_name(dev, &dai->id);
2883 dai->name = fmt_multiple_name(dev, dai_drv);
2885 dai->id = dai_drv->id;
2887 dai->id = component->num_dai;
2889 if (dai->name == NULL) {
2894 dai->component = component;
2896 dai->driver = dai_drv;
2897 if (!dai->driver->ops)
2898 dai->driver->ops = &null_dai_ops;
2900 list_add_tail(&dai->list, &component->dai_list);
2901 component->num_dai++;
2903 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2908 * snd_soc_register_dais - Register a DAI with the ASoC core
2910 * @component: The component the DAIs are registered for
2911 * @dai_drv: DAI driver to use for the DAIs
2912 * @count: Number of DAIs
2913 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
2916 static int snd_soc_register_dais(struct snd_soc_component *component,
2917 struct snd_soc_dai_driver *dai_drv, size_t count)
2919 struct device *dev = component->dev;
2920 struct snd_soc_dai *dai;
2924 dev_dbg(dev, "ASoC: dai register %s #%zu\n", dev_name(dev), count);
2926 for (i = 0; i < count; i++) {
2928 dai = soc_add_dai(component, dai_drv + i,
2929 count == 1 && !component->driver->non_legacy_dai_naming);
2939 snd_soc_unregister_dais(component);
2945 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2947 * @component: The component the DAIs are registered for
2948 * @dai_drv: DAI driver to use for the DAI
2950 * Topology can use this API to register DAIs when probing a component.
2951 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2952 * will be freed in the component cleanup.
2954 int snd_soc_register_dai(struct snd_soc_component *component,
2955 struct snd_soc_dai_driver *dai_drv)
2957 struct snd_soc_dapm_context *dapm =
2958 snd_soc_component_get_dapm(component);
2959 struct snd_soc_dai *dai;
2962 if (dai_drv->dobj.type != SND_SOC_DOBJ_PCM) {
2963 dev_err(component->dev, "Invalid dai type %d\n",
2964 dai_drv->dobj.type);
2968 lockdep_assert_held(&client_mutex);
2969 dai = soc_add_dai(component, dai_drv, false);
2973 /* Create the DAI widgets here. After adding DAIs, topology may
2974 * also add routes that need these widgets as source or sink.
2976 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
2978 dev_err(component->dev,
2979 "Failed to create DAI widgets %d\n", ret);
2984 EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2986 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2987 enum snd_soc_dapm_type type, int subseq)
2989 struct snd_soc_component *component = dapm->component;
2991 component->driver->seq_notifier(component, type, subseq);
2994 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
2997 struct snd_soc_component *component = dapm->component;
2999 return component->driver->stream_event(component, event);
3002 static int snd_soc_component_set_bias_level(struct snd_soc_dapm_context *dapm,
3003 enum snd_soc_bias_level level)
3005 struct snd_soc_component *component = dapm->component;
3007 return component->driver->set_bias_level(component, level);
3010 static int snd_soc_component_initialize(struct snd_soc_component *component,
3011 const struct snd_soc_component_driver *driver, struct device *dev)
3013 struct snd_soc_dapm_context *dapm;
3015 component->name = fmt_single_name(dev, &component->id);
3016 if (!component->name) {
3017 dev_err(dev, "ASoC: Failed to allocate name\n");
3021 component->dev = dev;
3022 component->driver = driver;
3024 dapm = snd_soc_component_get_dapm(component);
3026 dapm->component = component;
3027 dapm->bias_level = SND_SOC_BIAS_OFF;
3028 dapm->idle_bias_off = !driver->idle_bias_on;
3029 dapm->suspend_bias_off = driver->suspend_bias_off;
3030 if (driver->seq_notifier)
3031 dapm->seq_notifier = snd_soc_component_seq_notifier;
3032 if (driver->stream_event)
3033 dapm->stream_event = snd_soc_component_stream_event;
3034 if (driver->set_bias_level)
3035 dapm->set_bias_level = snd_soc_component_set_bias_level;
3037 INIT_LIST_HEAD(&component->dai_list);
3038 mutex_init(&component->io_mutex);
3043 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
3045 int val_bytes = regmap_get_val_bytes(component->regmap);
3047 /* Errors are legitimate for non-integer byte multiples */
3049 component->val_bytes = val_bytes;
3052 #ifdef CONFIG_REGMAP
3055 * snd_soc_component_init_regmap() - Initialize regmap instance for the component
3056 * @component: The component for which to initialize the regmap instance
3057 * @regmap: The regmap instance that should be used by the component
3059 * This function allows deferred assignment of the regmap instance that is
3060 * associated with the component. Only use this if the regmap instance is not
3061 * yet ready when the component is registered. The function must also be called
3062 * before the first IO attempt of the component.
3064 void snd_soc_component_init_regmap(struct snd_soc_component *component,
3065 struct regmap *regmap)
3067 component->regmap = regmap;
3068 snd_soc_component_setup_regmap(component);
3070 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
3073 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
3074 * @component: The component for which to de-initialize the regmap instance
3076 * Calls regmap_exit() on the regmap instance associated to the component and
3077 * removes the regmap instance from the component.
3079 * This function should only be used if snd_soc_component_init_regmap() was used
3080 * to initialize the regmap instance.
3082 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
3084 regmap_exit(component->regmap);
3085 component->regmap = NULL;
3087 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
3091 static void snd_soc_component_add(struct snd_soc_component *component)
3093 mutex_lock(&client_mutex);
3095 if (!component->driver->write && !component->driver->read) {
3096 if (!component->regmap)
3097 component->regmap = dev_get_regmap(component->dev, NULL);
3098 if (component->regmap)
3099 snd_soc_component_setup_regmap(component);
3102 list_add(&component->list, &component_list);
3103 INIT_LIST_HEAD(&component->dobj_list);
3105 mutex_unlock(&client_mutex);
3108 static void snd_soc_component_cleanup(struct snd_soc_component *component)
3110 snd_soc_unregister_dais(component);
3111 kfree(component->name);
3114 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
3116 struct snd_soc_card *card = component->card;
3119 snd_soc_unregister_card(card);
3121 list_del(&component->list);
3124 #define ENDIANNESS_MAP(name) \
3125 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
3126 static u64 endianness_format_map[] = {
3127 ENDIANNESS_MAP(S16_),
3128 ENDIANNESS_MAP(U16_),
3129 ENDIANNESS_MAP(S24_),
3130 ENDIANNESS_MAP(U24_),
3131 ENDIANNESS_MAP(S32_),
3132 ENDIANNESS_MAP(U32_),
3133 ENDIANNESS_MAP(S24_3),
3134 ENDIANNESS_MAP(U24_3),
3135 ENDIANNESS_MAP(S20_3),
3136 ENDIANNESS_MAP(U20_3),
3137 ENDIANNESS_MAP(S18_3),
3138 ENDIANNESS_MAP(U18_3),
3139 ENDIANNESS_MAP(FLOAT_),
3140 ENDIANNESS_MAP(FLOAT64_),
3141 ENDIANNESS_MAP(IEC958_SUBFRAME_),
3145 * Fix up the DAI formats for endianness: codecs don't actually see
3146 * the endianness of the data but we're using the CPU format
3147 * definitions which do need to include endianness so we ensure that
3148 * codec DAIs always have both big and little endian variants set.
3150 static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
3154 for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
3155 if (stream->formats & endianness_format_map[i])
3156 stream->formats |= endianness_format_map[i];
3159 int snd_soc_add_component(struct device *dev,
3160 struct snd_soc_component *component,
3161 const struct snd_soc_component_driver *component_driver,
3162 struct snd_soc_dai_driver *dai_drv,
3168 ret = snd_soc_component_initialize(component, component_driver, dev);
3172 if (component_driver->endianness) {
3173 for (i = 0; i < num_dai; i++) {
3174 convert_endianness_formats(&dai_drv[i].playback);
3175 convert_endianness_formats(&dai_drv[i].capture);
3179 ret = snd_soc_register_dais(component, dai_drv, num_dai);
3181 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3185 snd_soc_component_add(component);
3190 snd_soc_component_cleanup(component);
3194 EXPORT_SYMBOL_GPL(snd_soc_add_component);
3196 int snd_soc_register_component(struct device *dev,
3197 const struct snd_soc_component_driver *component_driver,
3198 struct snd_soc_dai_driver *dai_drv,
3201 struct snd_soc_component *component;
3203 component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
3207 return snd_soc_add_component(dev, component, component_driver,
3210 EXPORT_SYMBOL_GPL(snd_soc_register_component);
3213 * snd_soc_unregister_component - Unregister all related component
3214 * from the ASoC core
3216 * @dev: The device to unregister
3218 static int __snd_soc_unregister_component(struct device *dev)
3220 struct snd_soc_component *component;
3223 mutex_lock(&client_mutex);
3224 list_for_each_entry(component, &component_list, list) {
3225 if (dev != component->dev)
3228 snd_soc_tplg_component_remove(component, SND_SOC_TPLG_INDEX_ALL);
3229 snd_soc_component_del_unlocked(component);
3233 mutex_unlock(&client_mutex);
3236 snd_soc_component_cleanup(component);
3242 void snd_soc_unregister_component(struct device *dev)
3244 while (__snd_soc_unregister_component(dev));
3246 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
3248 struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
3249 const char *driver_name)
3251 struct snd_soc_component *component;
3252 struct snd_soc_component *ret;
3255 mutex_lock(&client_mutex);
3256 list_for_each_entry(component, &component_list, list) {
3257 if (dev != component->dev)
3261 (driver_name != component->driver->name) &&
3262 (strcmp(component->driver->name, driver_name) != 0))
3268 mutex_unlock(&client_mutex);
3272 EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
3274 /* Retrieve a card's name from device tree */
3275 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3276 const char *propname)
3278 struct device_node *np;
3282 pr_err("card->dev is not set before calling %s\n", __func__);
3286 np = card->dev->of_node;
3288 ret = of_property_read_string_index(np, propname, 0, &card->name);
3290 * EINVAL means the property does not exist. This is fine providing
3291 * card->name was previously set, which is checked later in
3292 * snd_soc_register_card.
3294 if (ret < 0 && ret != -EINVAL) {
3296 "ASoC: Property '%s' could not be read: %d\n",
3303 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3305 static const struct snd_soc_dapm_widget simple_widgets[] = {
3306 SND_SOC_DAPM_MIC("Microphone", NULL),
3307 SND_SOC_DAPM_LINE("Line", NULL),
3308 SND_SOC_DAPM_HP("Headphone", NULL),
3309 SND_SOC_DAPM_SPK("Speaker", NULL),
3312 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3313 const char *propname)
3315 struct device_node *np = card->dev->of_node;
3316 struct snd_soc_dapm_widget *widgets;
3317 const char *template, *wname;
3318 int i, j, num_widgets, ret;
3320 num_widgets = of_property_count_strings(np, propname);
3321 if (num_widgets < 0) {
3323 "ASoC: Property '%s' does not exist\n", propname);
3326 if (num_widgets & 1) {
3328 "ASoC: Property '%s' length is not even\n", propname);
3334 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3339 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3343 "ASoC: Could not allocate memory for widgets\n");
3347 for (i = 0; i < num_widgets; i++) {
3348 ret = of_property_read_string_index(np, propname,
3352 "ASoC: Property '%s' index %d read error:%d\n",
3353 propname, 2 * i, ret);
3357 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3358 if (!strncmp(template, simple_widgets[j].name,
3359 strlen(simple_widgets[j].name))) {
3360 widgets[i] = simple_widgets[j];
3365 if (j >= ARRAY_SIZE(simple_widgets)) {
3367 "ASoC: DAPM widget '%s' is not supported\n",
3372 ret = of_property_read_string_index(np, propname,
3377 "ASoC: Property '%s' index %d read error:%d\n",
3378 propname, (2 * i) + 1, ret);
3382 widgets[i].name = wname;
3385 card->of_dapm_widgets = widgets;
3386 card->num_of_dapm_widgets = num_widgets;
3390 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3392 int snd_soc_of_get_slot_mask(struct device_node *np,
3393 const char *prop_name,
3397 const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3403 for (i = 0; i < val; i++)
3404 if (be32_to_cpup(&of_slot_mask[i]))
3409 EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
3411 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3412 unsigned int *tx_mask,
3413 unsigned int *rx_mask,
3414 unsigned int *slots,
3415 unsigned int *slot_width)
3421 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3423 snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3425 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3426 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3434 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3435 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3445 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3447 void snd_soc_of_parse_audio_prefix(struct snd_soc_card *card,
3448 struct snd_soc_codec_conf *codec_conf,
3449 struct device_node *of_node,
3450 const char *propname)
3452 struct device_node *np = card->dev->of_node;
3456 ret = of_property_read_string(np, propname, &str);
3458 /* no prefix is not error */
3462 codec_conf->of_node = of_node;
3463 codec_conf->name_prefix = str;
3465 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_prefix);
3467 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3468 const char *propname)
3470 struct device_node *np = card->dev->of_node;
3472 struct snd_soc_dapm_route *routes;
3475 num_routes = of_property_count_strings(np, propname);
3476 if (num_routes < 0 || num_routes & 1) {
3478 "ASoC: Property '%s' does not exist or its length is not even\n",
3484 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3489 routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3493 "ASoC: Could not allocate DAPM route table\n");
3497 for (i = 0; i < num_routes; i++) {
3498 ret = of_property_read_string_index(np, propname,
3499 2 * i, &routes[i].sink);
3502 "ASoC: Property '%s' index %d could not be read: %d\n",
3503 propname, 2 * i, ret);
3506 ret = of_property_read_string_index(np, propname,
3507 (2 * i) + 1, &routes[i].source);
3510 "ASoC: Property '%s' index %d could not be read: %d\n",
3511 propname, (2 * i) + 1, ret);
3516 card->num_of_dapm_routes = num_routes;
3517 card->of_dapm_routes = routes;
3521 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3523 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3525 struct device_node **bitclkmaster,
3526 struct device_node **framemaster)
3530 unsigned int format = 0;
3536 } of_fmt_table[] = {
3537 { "i2s", SND_SOC_DAIFMT_I2S },
3538 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3539 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3540 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3541 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3542 { "ac97", SND_SOC_DAIFMT_AC97 },
3543 { "pdm", SND_SOC_DAIFMT_PDM},
3544 { "msb", SND_SOC_DAIFMT_MSB },
3545 { "lsb", SND_SOC_DAIFMT_LSB },
3552 * check "dai-format = xxx"
3553 * or "[prefix]format = xxx"
3554 * SND_SOC_DAIFMT_FORMAT_MASK area
3556 ret = of_property_read_string(np, "dai-format", &str);
3558 snprintf(prop, sizeof(prop), "%sformat", prefix);
3559 ret = of_property_read_string(np, prop, &str);
3562 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3563 if (strcmp(str, of_fmt_table[i].name) == 0) {
3564 format |= of_fmt_table[i].val;
3571 * check "[prefix]continuous-clock"
3572 * SND_SOC_DAIFMT_CLOCK_MASK area
3574 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3575 if (of_property_read_bool(np, prop))
3576 format |= SND_SOC_DAIFMT_CONT;
3578 format |= SND_SOC_DAIFMT_GATED;
3581 * check "[prefix]bitclock-inversion"
3582 * check "[prefix]frame-inversion"
3583 * SND_SOC_DAIFMT_INV_MASK area
3585 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3586 bit = !!of_get_property(np, prop, NULL);
3588 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3589 frame = !!of_get_property(np, prop, NULL);
3591 switch ((bit << 4) + frame) {
3593 format |= SND_SOC_DAIFMT_IB_IF;
3596 format |= SND_SOC_DAIFMT_IB_NF;
3599 format |= SND_SOC_DAIFMT_NB_IF;
3602 /* SND_SOC_DAIFMT_NB_NF is default */
3607 * check "[prefix]bitclock-master"
3608 * check "[prefix]frame-master"
3609 * SND_SOC_DAIFMT_MASTER_MASK area
3611 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3612 bit = !!of_get_property(np, prop, NULL);
3613 if (bit && bitclkmaster)
3614 *bitclkmaster = of_parse_phandle(np, prop, 0);
3616 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3617 frame = !!of_get_property(np, prop, NULL);
3618 if (frame && framemaster)
3619 *framemaster = of_parse_phandle(np, prop, 0);
3621 switch ((bit << 4) + frame) {
3623 format |= SND_SOC_DAIFMT_CBM_CFM;
3626 format |= SND_SOC_DAIFMT_CBM_CFS;
3629 format |= SND_SOC_DAIFMT_CBS_CFM;
3632 format |= SND_SOC_DAIFMT_CBS_CFS;
3638 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3640 int snd_soc_get_dai_id(struct device_node *ep)
3642 struct snd_soc_component *pos;
3643 struct device_node *node;
3646 node = of_graph_get_port_parent(ep);
3649 * For example HDMI case, HDMI has video/sound port,
3650 * but ALSA SoC needs sound port number only.
3651 * Thus counting HDMI DT port/endpoint doesn't work.
3652 * Then, it should have .of_xlate_dai_id
3655 mutex_lock(&client_mutex);
3656 list_for_each_entry(pos, &component_list, list) {
3657 struct device_node *component_of_node = pos->dev->of_node;
3659 if (!component_of_node && pos->dev->parent)
3660 component_of_node = pos->dev->parent->of_node;
3662 if (component_of_node != node)
3665 if (pos->driver->of_xlate_dai_id)
3666 ret = pos->driver->of_xlate_dai_id(pos, ep);
3670 mutex_unlock(&client_mutex);
3676 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3678 int snd_soc_get_dai_name(struct of_phandle_args *args,
3679 const char **dai_name)
3681 struct snd_soc_component *pos;
3682 struct device_node *component_of_node;
3683 int ret = -EPROBE_DEFER;
3685 mutex_lock(&client_mutex);
3686 list_for_each_entry(pos, &component_list, list) {
3687 component_of_node = pos->dev->of_node;
3688 if (!component_of_node && pos->dev->parent)
3689 component_of_node = pos->dev->parent->of_node;
3691 if (component_of_node != args->np)
3694 if (pos->driver->of_xlate_dai_name) {
3695 ret = pos->driver->of_xlate_dai_name(pos,
3699 struct snd_soc_dai *dai;
3702 switch (args->args_count) {
3704 id = 0; /* same as dai_drv[0] */
3714 if (id < 0 || id >= pos->num_dai) {
3721 /* find target DAI */
3722 list_for_each_entry(dai, &pos->dai_list, list) {
3728 *dai_name = dai->driver->name;
3730 *dai_name = pos->name;
3735 mutex_unlock(&client_mutex);
3738 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3740 int snd_soc_of_get_dai_name(struct device_node *of_node,
3741 const char **dai_name)
3743 struct of_phandle_args args;
3746 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3747 "#sound-dai-cells", 0, &args);
3751 ret = snd_soc_get_dai_name(&args, dai_name);
3753 of_node_put(args.np);
3757 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3760 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3761 * @dai_link: DAI link
3763 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3765 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3767 struct snd_soc_dai_link_component *component = dai_link->codecs;
3770 for (index = 0; index < dai_link->num_codecs; index++, component++) {
3771 if (!component->of_node)
3773 of_node_put(component->of_node);
3774 component->of_node = NULL;
3777 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3780 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3782 * @of_node: Device node
3783 * @dai_link: DAI link
3785 * Builds an array of CODEC DAI components from the DAI link property
3787 * The array is set in the DAI link and the number of DAIs is set accordingly.
3788 * The device nodes in the array (of_node) must be dereferenced by calling
3789 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3791 * Returns 0 for success
3793 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3794 struct device_node *of_node,
3795 struct snd_soc_dai_link *dai_link)
3797 struct of_phandle_args args;
3798 struct snd_soc_dai_link_component *component;
3800 int index, num_codecs, ret;
3802 /* Count the number of CODECs */
3804 num_codecs = of_count_phandle_with_args(of_node, name,
3805 "#sound-dai-cells");
3806 if (num_codecs <= 0) {
3807 if (num_codecs == -ENOENT)
3808 dev_err(dev, "No 'sound-dai' property\n");
3810 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3813 component = devm_kcalloc(dev,
3814 num_codecs, sizeof(*component),
3818 dai_link->codecs = component;
3819 dai_link->num_codecs = num_codecs;
3821 /* Parse the list */
3822 for (index = 0, component = dai_link->codecs;
3823 index < dai_link->num_codecs;
3824 index++, component++) {
3825 ret = of_parse_phandle_with_args(of_node, name,
3830 component->of_node = args.np;
3831 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3837 snd_soc_of_put_dai_link_codecs(dai_link);
3838 dai_link->codecs = NULL;
3839 dai_link->num_codecs = 0;
3842 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3844 static int __init snd_soc_init(void)
3846 snd_soc_debugfs_init();
3847 snd_soc_util_init();
3849 return platform_driver_register(&soc_driver);
3851 module_init(snd_soc_init);
3853 static void __exit snd_soc_exit(void)
3855 snd_soc_util_exit();
3856 snd_soc_debugfs_exit();
3858 platform_driver_unregister(&soc_driver);
3860 module_exit(snd_soc_exit);
3862 /* Module information */
3863 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3864 MODULE_DESCRIPTION("ALSA SoC Core");
3865 MODULE_LICENSE("GPL");
3866 MODULE_ALIAS("platform:soc-audio");