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 <linux/acpi.h>
35 #include <sound/core.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/soc-link.h>
42 #include <sound/initval.h>
44 #define CREATE_TRACE_POINTS
45 #include <trace/events/asoc.h>
47 static DEFINE_MUTEX(client_mutex
);
48 static LIST_HEAD(component_list
);
49 static LIST_HEAD(unbind_card_list
);
51 #define for_each_component(component) \
52 list_for_each_entry(component, &component_list, list)
55 * This is used if driver don't need to have CPU/Codec/Platform
58 struct snd_soc_dai_link_component null_dailink_component
[0];
59 EXPORT_SYMBOL_GPL(null_dailink_component
);
62 * This is a timeout to do a DAPM powerdown after a stream is closed().
63 * It can be used to eliminate pops between different playback streams, e.g.
64 * between two audio tracks.
66 static int pmdown_time
= 5000;
67 module_param(pmdown_time
, int, 0);
68 MODULE_PARM_DESC(pmdown_time
, "DAPM stream powerdown time (msecs)");
70 static ssize_t
pmdown_time_show(struct device
*dev
,
71 struct device_attribute
*attr
, char *buf
)
73 struct snd_soc_pcm_runtime
*rtd
= dev_get_drvdata(dev
);
75 return sysfs_emit(buf
, "%ld\n", rtd
->pmdown_time
);
78 static ssize_t
pmdown_time_store(struct device
*dev
,
79 struct device_attribute
*attr
,
80 const char *buf
, size_t count
)
82 struct snd_soc_pcm_runtime
*rtd
= dev_get_drvdata(dev
);
85 ret
= kstrtol(buf
, 10, &rtd
->pmdown_time
);
92 static DEVICE_ATTR_RW(pmdown_time
);
94 static struct attribute
*soc_dev_attrs
[] = {
95 &dev_attr_pmdown_time
.attr
,
99 static umode_t
soc_dev_attr_is_visible(struct kobject
*kobj
,
100 struct attribute
*attr
, int idx
)
102 struct device
*dev
= kobj_to_dev(kobj
);
103 struct snd_soc_pcm_runtime
*rtd
= dev_get_drvdata(dev
);
108 if (attr
== &dev_attr_pmdown_time
.attr
)
109 return attr
->mode
; /* always visible */
110 return rtd
->dai_link
->num_codecs
? attr
->mode
: 0; /* enabled only with codec */
113 static const struct attribute_group soc_dapm_dev_group
= {
114 .attrs
= soc_dapm_dev_attrs
,
115 .is_visible
= soc_dev_attr_is_visible
,
118 static const struct attribute_group soc_dev_group
= {
119 .attrs
= soc_dev_attrs
,
120 .is_visible
= soc_dev_attr_is_visible
,
123 static const struct attribute_group
*soc_dev_attr_groups
[] = {
129 #ifdef CONFIG_DEBUG_FS
130 struct dentry
*snd_soc_debugfs_root
;
131 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root
);
133 static void soc_init_component_debugfs(struct snd_soc_component
*component
)
135 if (!component
->card
->debugfs_card_root
)
138 if (component
->debugfs_prefix
) {
141 name
= kasprintf(GFP_KERNEL
, "%s:%s",
142 component
->debugfs_prefix
, component
->name
);
144 component
->debugfs_root
= debugfs_create_dir(name
,
145 component
->card
->debugfs_card_root
);
149 component
->debugfs_root
= debugfs_create_dir(component
->name
,
150 component
->card
->debugfs_card_root
);
153 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component
),
154 component
->debugfs_root
);
157 static void soc_cleanup_component_debugfs(struct snd_soc_component
*component
)
159 if (!component
->debugfs_root
)
161 debugfs_remove_recursive(component
->debugfs_root
);
162 component
->debugfs_root
= NULL
;
165 static int dai_list_show(struct seq_file
*m
, void *v
)
167 struct snd_soc_component
*component
;
168 struct snd_soc_dai
*dai
;
170 mutex_lock(&client_mutex
);
172 for_each_component(component
)
173 for_each_component_dais(component
, dai
)
174 seq_printf(m
, "%s\n", dai
->name
);
176 mutex_unlock(&client_mutex
);
180 DEFINE_SHOW_ATTRIBUTE(dai_list
);
182 static int component_list_show(struct seq_file
*m
, void *v
)
184 struct snd_soc_component
*component
;
186 mutex_lock(&client_mutex
);
188 for_each_component(component
)
189 seq_printf(m
, "%s\n", component
->name
);
191 mutex_unlock(&client_mutex
);
195 DEFINE_SHOW_ATTRIBUTE(component_list
);
197 static void soc_init_card_debugfs(struct snd_soc_card
*card
)
199 card
->debugfs_card_root
= debugfs_create_dir(card
->name
,
200 snd_soc_debugfs_root
);
202 debugfs_create_u32("dapm_pop_time", 0644, card
->debugfs_card_root
,
205 snd_soc_dapm_debugfs_init(&card
->dapm
, card
->debugfs_card_root
);
208 static void soc_cleanup_card_debugfs(struct snd_soc_card
*card
)
210 debugfs_remove_recursive(card
->debugfs_card_root
);
211 card
->debugfs_card_root
= NULL
;
214 static void snd_soc_debugfs_init(void)
216 snd_soc_debugfs_root
= debugfs_create_dir("asoc", NULL
);
218 debugfs_create_file("dais", 0444, snd_soc_debugfs_root
, NULL
,
221 debugfs_create_file("components", 0444, snd_soc_debugfs_root
, NULL
,
222 &component_list_fops
);
225 static void snd_soc_debugfs_exit(void)
227 debugfs_remove_recursive(snd_soc_debugfs_root
);
232 static inline void soc_init_component_debugfs(struct snd_soc_component
*component
) { }
233 static inline void soc_cleanup_component_debugfs(struct snd_soc_component
*component
) { }
234 static inline void soc_init_card_debugfs(struct snd_soc_card
*card
) { }
235 static inline void soc_cleanup_card_debugfs(struct snd_soc_card
*card
) { }
236 static inline void snd_soc_debugfs_init(void) { }
237 static inline void snd_soc_debugfs_exit(void) { }
241 static int snd_soc_rtd_add_component(struct snd_soc_pcm_runtime
*rtd
,
242 struct snd_soc_component
*component
)
244 struct snd_soc_component
*comp
;
247 for_each_rtd_components(rtd
, i
, comp
) {
248 /* already connected */
249 if (comp
== component
)
253 /* see for_each_rtd_components */
254 rtd
->components
[rtd
->num_components
] = component
;
255 rtd
->num_components
++;
260 struct snd_soc_component
*snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime
*rtd
,
261 const char *driver_name
)
263 struct snd_soc_component
*component
;
272 * snd_soc_rtdcom_lookup() will find component from rtd by using
273 * specified driver name.
274 * But, if many components which have same driver name are connected
275 * to 1 rtd, this function will return 1st found component.
277 for_each_rtd_components(rtd
, i
, component
) {
278 const char *component_name
= component
->driver
->name
;
283 if ((component_name
== driver_name
) ||
284 strcmp(component_name
, driver_name
) == 0)
290 EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup
);
292 struct snd_soc_component
293 *snd_soc_lookup_component_nolocked(struct device
*dev
, const char *driver_name
)
295 struct snd_soc_component
*component
;
296 struct snd_soc_component
*found_component
;
298 found_component
= NULL
;
299 for_each_component(component
) {
300 if ((dev
== component
->dev
) &&
302 (driver_name
== component
->driver
->name
) ||
303 (strcmp(component
->driver
->name
, driver_name
) == 0))) {
304 found_component
= component
;
309 return found_component
;
311 EXPORT_SYMBOL_GPL(snd_soc_lookup_component_nolocked
);
313 struct snd_soc_component
*snd_soc_lookup_component(struct device
*dev
,
314 const char *driver_name
)
316 struct snd_soc_component
*component
;
318 mutex_lock(&client_mutex
);
319 component
= snd_soc_lookup_component_nolocked(dev
, driver_name
);
320 mutex_unlock(&client_mutex
);
324 EXPORT_SYMBOL_GPL(snd_soc_lookup_component
);
326 struct snd_soc_pcm_runtime
327 *snd_soc_get_pcm_runtime(struct snd_soc_card
*card
,
328 struct snd_soc_dai_link
*dai_link
)
330 struct snd_soc_pcm_runtime
*rtd
;
332 for_each_card_rtds(card
, rtd
) {
333 if (rtd
->dai_link
== dai_link
)
336 dev_dbg(card
->dev
, "ASoC: failed to find rtd %s\n", dai_link
->name
);
339 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime
);
342 * Power down the audio subsystem pmdown_time msecs after close is called.
343 * This is to ensure there are no pops or clicks in between any music tracks
344 * due to DAPM power cycling.
346 void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime
*rtd
)
348 struct snd_soc_dai
*codec_dai
= asoc_rtd_to_codec(rtd
, 0);
349 int playback
= SNDRV_PCM_STREAM_PLAYBACK
;
351 snd_soc_dpcm_mutex_lock(rtd
);
354 "ASoC: pop wq checking: %s status: %s waiting: %s\n",
355 codec_dai
->driver
->playback
.stream_name
,
356 snd_soc_dai_stream_active(codec_dai
, playback
) ?
357 "active" : "inactive",
358 rtd
->pop_wait
? "yes" : "no");
360 /* are we waiting on this codec DAI stream */
361 if (rtd
->pop_wait
== 1) {
363 snd_soc_dapm_stream_event(rtd
, playback
,
364 SND_SOC_DAPM_STREAM_STOP
);
367 snd_soc_dpcm_mutex_unlock(rtd
);
369 EXPORT_SYMBOL_GPL(snd_soc_close_delayed_work
);
371 static void soc_release_rtd_dev(struct device
*dev
)
373 /* "dev" means "rtd->dev" */
377 static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime
*rtd
)
382 list_del(&rtd
->list
);
384 if (delayed_work_pending(&rtd
->delayed_work
))
385 flush_delayed_work(&rtd
->delayed_work
);
386 snd_soc_pcm_component_free(rtd
);
389 * we don't need to call kfree() for rtd->dev
391 * soc_release_rtd_dev()
393 * We don't need rtd->dev NULL check, because
394 * it is alloced *before* rtd.
396 * soc_new_pcm_runtime()
398 * We don't need to mind freeing for rtd,
399 * because it was created from dev (= rtd->dev)
401 * soc_new_pcm_runtime()
403 * rtd = devm_kzalloc(dev, ...);
406 device_unregister(rtd
->dev
);
409 static void close_delayed_work(struct work_struct
*work
) {
410 struct snd_soc_pcm_runtime
*rtd
=
411 container_of(work
, struct snd_soc_pcm_runtime
,
414 if (rtd
->close_delayed_work_func
)
415 rtd
->close_delayed_work_func(rtd
);
418 static struct snd_soc_pcm_runtime
*soc_new_pcm_runtime(
419 struct snd_soc_card
*card
, struct snd_soc_dai_link
*dai_link
)
421 struct snd_soc_pcm_runtime
*rtd
;
422 struct snd_soc_component
*component
;
430 dev
= kzalloc(sizeof(struct device
), GFP_KERNEL
);
434 dev
->parent
= card
->dev
;
435 dev
->release
= soc_release_rtd_dev
;
437 dev_set_name(dev
, "%s", dai_link
->name
);
439 ret
= device_register(dev
);
441 put_device(dev
); /* soc_release_rtd_dev */
448 rtd
= devm_kzalloc(dev
,
450 sizeof(component
) * (dai_link
->num_cpus
+
451 dai_link
->num_codecs
+
452 dai_link
->num_platforms
),
455 device_unregister(dev
);
460 INIT_LIST_HEAD(&rtd
->list
);
461 for_each_pcm_streams(stream
) {
462 INIT_LIST_HEAD(&rtd
->dpcm
[stream
].be_clients
);
463 INIT_LIST_HEAD(&rtd
->dpcm
[stream
].fe_clients
);
465 dev_set_drvdata(dev
, rtd
);
466 INIT_DELAYED_WORK(&rtd
->delayed_work
, close_delayed_work
);
471 rtd
->dais
= devm_kcalloc(dev
, dai_link
->num_cpus
+ dai_link
->num_codecs
,
472 sizeof(struct snd_soc_dai
*),
478 * dais = [][][][][][][][][][][][][][][][][][]
479 * ^cpu_dais ^codec_dais
480 * |--- num_cpus ---|--- num_codecs --|
483 * asoc_rtd_to_codec()
486 rtd
->dai_link
= dai_link
;
487 rtd
->num
= card
->num_rtd
++;
488 rtd
->pmdown_time
= pmdown_time
; /* default power off timeout */
490 /* see for_each_card_rtds */
491 list_add_tail(&rtd
->list
, &card
->rtd_list
);
493 ret
= device_add_groups(dev
, soc_dev_attr_groups
);
500 soc_free_pcm_runtime(rtd
);
504 static void snd_soc_flush_all_delayed_work(struct snd_soc_card
*card
)
506 struct snd_soc_pcm_runtime
*rtd
;
508 for_each_card_rtds(card
, rtd
)
509 flush_delayed_work(&rtd
->delayed_work
);
512 #ifdef CONFIG_PM_SLEEP
513 static void soc_playback_digital_mute(struct snd_soc_card
*card
, int mute
)
515 struct snd_soc_pcm_runtime
*rtd
;
516 struct snd_soc_dai
*dai
;
517 int playback
= SNDRV_PCM_STREAM_PLAYBACK
;
520 for_each_card_rtds(card
, rtd
) {
522 if (rtd
->dai_link
->ignore_suspend
)
525 for_each_rtd_dais(rtd
, i
, dai
) {
526 if (snd_soc_dai_stream_active(dai
, playback
))
527 snd_soc_dai_digital_mute(dai
, mute
, playback
);
532 static void soc_dapm_suspend_resume(struct snd_soc_card
*card
, int event
)
534 struct snd_soc_pcm_runtime
*rtd
;
537 for_each_card_rtds(card
, rtd
) {
539 if (rtd
->dai_link
->ignore_suspend
)
542 for_each_pcm_streams(stream
)
543 snd_soc_dapm_stream_event(rtd
, stream
, event
);
547 /* powers down audio subsystem for suspend */
548 int snd_soc_suspend(struct device
*dev
)
550 struct snd_soc_card
*card
= dev_get_drvdata(dev
);
551 struct snd_soc_component
*component
;
552 struct snd_soc_pcm_runtime
*rtd
;
555 /* If the card is not initialized yet there is nothing to do */
556 if (!snd_soc_card_is_instantiated(card
))
560 * Due to the resume being scheduled into a workqueue we could
561 * suspend before that's finished - wait for it to complete.
563 snd_power_wait(card
->snd_card
);
565 /* we're going to block userspace touching us until resume completes */
566 snd_power_change_state(card
->snd_card
, SNDRV_CTL_POWER_D3hot
);
568 /* mute any active DACs */
569 soc_playback_digital_mute(card
, 1);
571 /* suspend all pcms */
572 for_each_card_rtds(card
, rtd
) {
573 if (rtd
->dai_link
->ignore_suspend
)
576 snd_pcm_suspend_all(rtd
->pcm
);
579 snd_soc_card_suspend_pre(card
);
581 /* close any waiting streams */
582 snd_soc_flush_all_delayed_work(card
);
584 soc_dapm_suspend_resume(card
, SND_SOC_DAPM_STREAM_SUSPEND
);
586 /* Recheck all endpoints too, their state is affected by suspend */
587 dapm_mark_endpoints_dirty(card
);
588 snd_soc_dapm_sync(&card
->dapm
);
590 /* suspend all COMPONENTs */
591 for_each_card_rtds(card
, rtd
) {
593 if (rtd
->dai_link
->ignore_suspend
)
596 for_each_rtd_components(rtd
, i
, component
) {
597 struct snd_soc_dapm_context
*dapm
=
598 snd_soc_component_get_dapm(component
);
601 * ignore if component was already suspended
603 if (snd_soc_component_is_suspended(component
))
607 * If there are paths active then the COMPONENT will be
608 * held with bias _ON and should not be suspended.
610 switch (snd_soc_dapm_get_bias_level(dapm
)) {
611 case SND_SOC_BIAS_STANDBY
:
613 * If the COMPONENT is capable of idle
614 * bias off then being in STANDBY
615 * means it's doing something,
616 * otherwise fall through.
618 if (dapm
->idle_bias_off
) {
619 dev_dbg(component
->dev
,
620 "ASoC: idle_bias_off CODEC on over suspend\n");
625 case SND_SOC_BIAS_OFF
:
626 snd_soc_component_suspend(component
);
627 if (component
->regmap
)
628 regcache_mark_dirty(component
->regmap
);
629 /* deactivate pins to sleep state */
630 pinctrl_pm_select_sleep_state(component
->dev
);
633 dev_dbg(component
->dev
,
634 "ASoC: COMPONENT is on over suspend\n");
640 snd_soc_card_suspend_post(card
);
644 EXPORT_SYMBOL_GPL(snd_soc_suspend
);
647 * deferred resume work, so resume can complete before we finished
648 * setting our codec back up, which can be very slow on I2C
650 static void soc_resume_deferred(struct work_struct
*work
)
652 struct snd_soc_card
*card
=
653 container_of(work
, struct snd_soc_card
,
654 deferred_resume_work
);
655 struct snd_soc_component
*component
;
658 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
659 * so userspace apps are blocked from touching us
662 dev_dbg(card
->dev
, "ASoC: starting resume work\n");
664 /* Bring us up into D2 so that DAPM starts enabling things */
665 snd_power_change_state(card
->snd_card
, SNDRV_CTL_POWER_D2
);
667 snd_soc_card_resume_pre(card
);
669 for_each_card_components(card
, component
) {
670 if (snd_soc_component_is_suspended(component
))
671 snd_soc_component_resume(component
);
674 soc_dapm_suspend_resume(card
, SND_SOC_DAPM_STREAM_RESUME
);
676 /* unmute any active DACs */
677 soc_playback_digital_mute(card
, 0);
679 snd_soc_card_resume_post(card
);
681 dev_dbg(card
->dev
, "ASoC: resume work completed\n");
683 /* Recheck all endpoints too, their state is affected by suspend */
684 dapm_mark_endpoints_dirty(card
);
685 snd_soc_dapm_sync(&card
->dapm
);
687 /* userspace can access us now we are back as we were before */
688 snd_power_change_state(card
->snd_card
, SNDRV_CTL_POWER_D0
);
691 /* powers up audio subsystem after a suspend */
692 int snd_soc_resume(struct device
*dev
)
694 struct snd_soc_card
*card
= dev_get_drvdata(dev
);
695 struct snd_soc_component
*component
;
697 /* If the card is not initialized yet there is nothing to do */
698 if (!snd_soc_card_is_instantiated(card
))
701 /* activate pins from sleep state */
702 for_each_card_components(card
, component
)
703 if (snd_soc_component_active(component
))
704 pinctrl_pm_select_default_state(component
->dev
);
706 dev_dbg(dev
, "ASoC: Scheduling resume work\n");
707 if (!schedule_work(&card
->deferred_resume_work
))
708 dev_err(dev
, "ASoC: resume work item may be lost\n");
712 EXPORT_SYMBOL_GPL(snd_soc_resume
);
714 static void soc_resume_init(struct snd_soc_card
*card
)
716 /* deferred resume work */
717 INIT_WORK(&card
->deferred_resume_work
, soc_resume_deferred
);
720 #define snd_soc_suspend NULL
721 #define snd_soc_resume NULL
722 static inline void soc_resume_init(struct snd_soc_card
*card
) { }
725 static struct device_node
726 *soc_component_to_node(struct snd_soc_component
*component
)
728 struct device_node
*of_node
;
730 of_node
= component
->dev
->of_node
;
731 if (!of_node
&& component
->dev
->parent
)
732 of_node
= component
->dev
->parent
->of_node
;
737 static int snd_soc_is_matching_component(
738 const struct snd_soc_dai_link_component
*dlc
,
739 struct snd_soc_component
*component
)
741 struct device_node
*component_of_node
;
746 component_of_node
= soc_component_to_node(component
);
748 if (dlc
->of_node
&& component_of_node
!= dlc
->of_node
)
750 if (dlc
->name
&& strcmp(component
->name
, dlc
->name
))
756 static struct snd_soc_component
*soc_find_component(
757 const struct snd_soc_dai_link_component
*dlc
)
759 struct snd_soc_component
*component
;
761 lockdep_assert_held(&client_mutex
);
766 * It returns *1st* found component, but some driver
767 * has few components by same of_node/name
769 * CPU component and generic DMAEngine component
771 for_each_component(component
)
772 if (snd_soc_is_matching_component(dlc
, component
))
779 * snd_soc_find_dai - Find a registered DAI
781 * @dlc: name of the DAI or the DAI driver and optional component info to match
783 * This function will search all registered components and their DAIs to
784 * find the DAI of the same name. The component's of_node and name
785 * should also match if being specified.
787 * Return: pointer of DAI, or NULL if not found.
789 struct snd_soc_dai
*snd_soc_find_dai(
790 const struct snd_soc_dai_link_component
*dlc
)
792 struct snd_soc_component
*component
;
793 struct snd_soc_dai
*dai
;
795 lockdep_assert_held(&client_mutex
);
797 /* Find CPU DAI from registered DAIs */
798 for_each_component(component
) {
799 if (!snd_soc_is_matching_component(dlc
, component
))
801 for_each_component_dais(component
, dai
) {
802 if (dlc
->dai_name
&& strcmp(dai
->name
, dlc
->dai_name
)
803 && (!dai
->driver
->name
804 || strcmp(dai
->driver
->name
, dlc
->dai_name
)))
813 EXPORT_SYMBOL_GPL(snd_soc_find_dai
);
815 struct snd_soc_dai
*snd_soc_find_dai_with_mutex(
816 const struct snd_soc_dai_link_component
*dlc
)
818 struct snd_soc_dai
*dai
;
820 mutex_lock(&client_mutex
);
821 dai
= snd_soc_find_dai(dlc
);
822 mutex_unlock(&client_mutex
);
826 EXPORT_SYMBOL_GPL(snd_soc_find_dai_with_mutex
);
828 static int soc_dai_link_sanity_check(struct snd_soc_card
*card
,
829 struct snd_soc_dai_link
*link
)
832 struct snd_soc_dai_link_component
*cpu
, *codec
, *platform
;
834 for_each_link_codecs(link
, i
, codec
) {
836 * Codec must be specified by 1 of name or OF node,
837 * not both or neither.
839 if (!!codec
->name
== !!codec
->of_node
) {
840 dev_err(card
->dev
, "ASoC: Neither/both codec name/of_node are set for %s\n",
845 /* Codec DAI name must be specified */
846 if (!codec
->dai_name
) {
847 dev_err(card
->dev
, "ASoC: codec_dai_name not set for %s\n",
853 * Defer card registration if codec component is not added to
856 if (!soc_find_component(codec
)) {
858 "ASoC: codec component %s not found for link %s\n",
859 codec
->name
, link
->name
);
860 return -EPROBE_DEFER
;
864 for_each_link_platforms(link
, i
, platform
) {
866 * Platform may be specified by either name or OF node, but it
867 * can be left unspecified, then no components will be inserted
870 if (!!platform
->name
== !!platform
->of_node
) {
872 "ASoC: Neither/both platform name/of_node are set for %s\n",
878 * Defer card registration if platform component is not added to
881 if (!soc_find_component(platform
)) {
883 "ASoC: platform component %s not found for link %s\n",
884 platform
->name
, link
->name
);
885 return -EPROBE_DEFER
;
889 for_each_link_cpus(link
, i
, cpu
) {
891 * CPU device may be specified by either name or OF node, but
892 * can be left unspecified, and will be matched based on DAI
895 if (cpu
->name
&& cpu
->of_node
) {
897 "ASoC: Neither/both cpu name/of_node are set for %s\n",
903 * Defer card registration if cpu dai component is not added to
906 if ((cpu
->of_node
|| cpu
->name
) &&
907 !soc_find_component(cpu
)) {
909 "ASoC: cpu component %s not found for link %s\n",
910 cpu
->name
, link
->name
);
911 return -EPROBE_DEFER
;
915 * At least one of CPU DAI name or CPU device name/node must be
918 if (!cpu
->dai_name
&&
919 !(cpu
->name
|| cpu
->of_node
)) {
921 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
931 * snd_soc_remove_pcm_runtime - Remove a pcm_runtime from card
932 * @card: The ASoC card to which the pcm_runtime has
933 * @rtd: The pcm_runtime to remove
935 * This function removes a pcm_runtime from the ASoC card.
937 void snd_soc_remove_pcm_runtime(struct snd_soc_card
*card
,
938 struct snd_soc_pcm_runtime
*rtd
)
940 lockdep_assert_held(&client_mutex
);
943 * Notify the machine driver for extra destruction
945 snd_soc_card_remove_dai_link(card
, rtd
->dai_link
);
947 soc_free_pcm_runtime(rtd
);
949 EXPORT_SYMBOL_GPL(snd_soc_remove_pcm_runtime
);
952 * snd_soc_add_pcm_runtime - Add a pcm_runtime dynamically via dai_link
953 * @card: The ASoC card to which the pcm_runtime is added
954 * @dai_link: The DAI link to find pcm_runtime
956 * This function adds a pcm_runtime ASoC card by using dai_link.
958 * Note: Topology can use this API to add pcm_runtime when probing the
959 * topology component. And machine drivers can still define static
960 * DAI links in dai_link array.
962 static int snd_soc_add_pcm_runtime(struct snd_soc_card
*card
,
963 struct snd_soc_dai_link
*dai_link
)
965 struct snd_soc_pcm_runtime
*rtd
;
966 struct snd_soc_dai_link_component
*codec
, *platform
, *cpu
;
967 struct snd_soc_component
*component
;
970 lockdep_assert_held(&client_mutex
);
973 * Notify the machine driver for extra initialization
975 ret
= snd_soc_card_add_dai_link(card
, dai_link
);
979 if (dai_link
->ignore
)
982 dev_dbg(card
->dev
, "ASoC: binding %s\n", dai_link
->name
);
984 ret
= soc_dai_link_sanity_check(card
, dai_link
);
988 rtd
= soc_new_pcm_runtime(card
, dai_link
);
992 for_each_link_cpus(dai_link
, i
, cpu
) {
993 asoc_rtd_to_cpu(rtd
, i
) = snd_soc_find_dai(cpu
);
994 if (!asoc_rtd_to_cpu(rtd
, i
)) {
995 dev_info(card
->dev
, "ASoC: CPU DAI %s not registered\n",
999 snd_soc_rtd_add_component(rtd
, asoc_rtd_to_cpu(rtd
, i
)->component
);
1002 /* Find CODEC from registered CODECs */
1003 for_each_link_codecs(dai_link
, i
, codec
) {
1004 asoc_rtd_to_codec(rtd
, i
) = snd_soc_find_dai(codec
);
1005 if (!asoc_rtd_to_codec(rtd
, i
)) {
1006 dev_info(card
->dev
, "ASoC: CODEC DAI %s not registered\n",
1011 snd_soc_rtd_add_component(rtd
, asoc_rtd_to_codec(rtd
, i
)->component
);
1014 /* Find PLATFORM from registered PLATFORMs */
1015 for_each_link_platforms(dai_link
, i
, platform
) {
1016 for_each_component(component
) {
1017 if (!snd_soc_is_matching_component(platform
, component
))
1020 snd_soc_rtd_add_component(rtd
, component
);
1027 snd_soc_remove_pcm_runtime(card
, rtd
);
1028 return -EPROBE_DEFER
;
1031 int snd_soc_add_pcm_runtimes(struct snd_soc_card
*card
,
1032 struct snd_soc_dai_link
*dai_link
,
1035 for (int i
= 0; i
< num_dai_link
; i
++) {
1036 int ret
= snd_soc_add_pcm_runtime(card
, dai_link
+ i
);
1044 EXPORT_SYMBOL_GPL(snd_soc_add_pcm_runtimes
);
1046 static void snd_soc_runtime_get_dai_fmt(struct snd_soc_pcm_runtime
*rtd
)
1048 struct snd_soc_dai_link
*dai_link
= rtd
->dai_link
;
1049 struct snd_soc_dai
*dai
, *not_used
;
1050 u64 pos
, possible_fmt
;
1051 unsigned int mask
= 0, dai_fmt
= 0;
1052 int i
, j
, priority
, pri
, until
;
1055 * Get selectable format from each DAIs.
1057 ****************************
1059 * Using .auto_selectable_formats is not mandatory,
1060 * we can select format manually from Sound Card.
1061 * When use it, driver should list well tested format only.
1062 ****************************
1065 * auto_selectable_formats (= SND_SOC_POSSIBLE_xxx)
1067 * DAI0_: { 0x000F, 0x00F0, 0x0F00 };
1068 * DAI1 : { 0xF000, 0x0F00 };
1071 * "until" will be 3 in this case (MAX array size from DAI0 and DAI1)
1072 * Here is dev_dbg() message and comments
1075 * DAI0: (pri, fmt) = (1, 000000000000000F) // 1st check (A) DAI1 is not selected
1076 * DAI1: (pri, fmt) = (0, 0000000000000000) // Necessary Waste
1077 * DAI0: (pri, fmt) = (1, 000000000000000F) // 2nd check (A)
1078 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1080 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 3rd check (A) + (B)
1081 * DAI1: (pri, fmt) = (1, 000000000000F000) // (X)
1082 * DAI0: (pri, fmt) = (2, 00000000000000FF) // 4th check (A) + (B)
1083 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1085 * DAI0: (pri, fmt) = (3, 0000000000000FFF) // 5th check (A) + (B) + (C)
1086 * DAI1: (pri, fmt) = (2, 000000000000FF00) // (X) + (Y)
1087 * found auto selected format: 0000000000000F00
1089 until
= snd_soc_dai_get_fmt_max_priority(rtd
);
1090 for (priority
= 1; priority
<= until
; priority
++) {
1091 for_each_rtd_dais(rtd
, j
, not_used
) {
1093 possible_fmt
= ULLONG_MAX
;
1094 for_each_rtd_dais(rtd
, i
, dai
) {
1097 pri
= (j
>= i
) ? priority
: priority
- 1;
1098 fmt
= snd_soc_dai_get_fmt(dai
, pri
);
1099 possible_fmt
&= fmt
;
1109 * convert POSSIBLE_DAIFMT to DAIFMT
1111 * Some basic/default settings on each is defined as 0.
1113 * SND_SOC_DAIFMT_NB_NF
1114 * SND_SOC_DAIFMT_GATED
1116 * SND_SOC_DAIFMT_xxx_MASK can't notice it if Sound Card specify
1117 * these value, and will be overwrite to auto selected value.
1119 * To avoid such issue, loop from 63 to 0 here.
1120 * Small number of SND_SOC_POSSIBLE_xxx will be Hi priority.
1121 * Basic/Default settings of each part and aboves are defined
1122 * as Hi priority (= small number) of SND_SOC_POSSIBLE_xxx.
1124 for (i
= 63; i
>= 0; i
--) {
1126 switch (possible_fmt
& pos
) {
1130 case SND_SOC_POSSIBLE_DAIFMT_I2S
:
1131 case SND_SOC_POSSIBLE_DAIFMT_RIGHT_J
:
1132 case SND_SOC_POSSIBLE_DAIFMT_LEFT_J
:
1133 case SND_SOC_POSSIBLE_DAIFMT_DSP_A
:
1134 case SND_SOC_POSSIBLE_DAIFMT_DSP_B
:
1135 case SND_SOC_POSSIBLE_DAIFMT_AC97
:
1136 case SND_SOC_POSSIBLE_DAIFMT_PDM
:
1137 dai_fmt
= (dai_fmt
& ~SND_SOC_DAIFMT_FORMAT_MASK
) | i
;
1142 case SND_SOC_POSSIBLE_DAIFMT_CONT
:
1143 dai_fmt
= (dai_fmt
& ~SND_SOC_DAIFMT_CLOCK_MASK
) | SND_SOC_DAIFMT_CONT
;
1145 case SND_SOC_POSSIBLE_DAIFMT_GATED
:
1146 dai_fmt
= (dai_fmt
& ~SND_SOC_DAIFMT_CLOCK_MASK
) | SND_SOC_DAIFMT_GATED
;
1151 case SND_SOC_POSSIBLE_DAIFMT_NB_NF
:
1152 dai_fmt
= (dai_fmt
& ~SND_SOC_DAIFMT_INV_MASK
) | SND_SOC_DAIFMT_NB_NF
;
1154 case SND_SOC_POSSIBLE_DAIFMT_NB_IF
:
1155 dai_fmt
= (dai_fmt
& ~SND_SOC_DAIFMT_INV_MASK
) | SND_SOC_DAIFMT_NB_IF
;
1157 case SND_SOC_POSSIBLE_DAIFMT_IB_NF
:
1158 dai_fmt
= (dai_fmt
& ~SND_SOC_DAIFMT_INV_MASK
) | SND_SOC_DAIFMT_IB_NF
;
1160 case SND_SOC_POSSIBLE_DAIFMT_IB_IF
:
1161 dai_fmt
= (dai_fmt
& ~SND_SOC_DAIFMT_INV_MASK
) | SND_SOC_DAIFMT_IB_IF
;
1164 * for clock provider / consumer
1166 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFP
:
1167 dai_fmt
= (dai_fmt
& ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK
) | SND_SOC_DAIFMT_CBP_CFP
;
1169 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFP
:
1170 dai_fmt
= (dai_fmt
& ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK
) | SND_SOC_DAIFMT_CBC_CFP
;
1172 case SND_SOC_POSSIBLE_DAIFMT_CBP_CFC
:
1173 dai_fmt
= (dai_fmt
& ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK
) | SND_SOC_DAIFMT_CBP_CFC
;
1175 case SND_SOC_POSSIBLE_DAIFMT_CBC_CFC
:
1176 dai_fmt
= (dai_fmt
& ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK
) | SND_SOC_DAIFMT_CBC_CFC
;
1182 * Some driver might have very complex limitation.
1183 * In such case, user want to auto-select non-limitation part,
1184 * and want to manually specify complex part.
1186 * Or for example, if both CPU and Codec can be clock provider,
1187 * but because of its quality, user want to specify it manually.
1189 * Use manually specified settings if sound card did.
1191 if (!(dai_link
->dai_fmt
& SND_SOC_DAIFMT_FORMAT_MASK
))
1192 mask
|= SND_SOC_DAIFMT_FORMAT_MASK
;
1193 if (!(dai_link
->dai_fmt
& SND_SOC_DAIFMT_CLOCK_MASK
))
1194 mask
|= SND_SOC_DAIFMT_CLOCK_MASK
;
1195 if (!(dai_link
->dai_fmt
& SND_SOC_DAIFMT_INV_MASK
))
1196 mask
|= SND_SOC_DAIFMT_INV_MASK
;
1197 if (!(dai_link
->dai_fmt
& SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK
))
1198 mask
|= SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK
;
1200 dai_link
->dai_fmt
|= (dai_fmt
& mask
);
1204 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1205 * @rtd: The runtime for which the DAI link format should be changed
1206 * @dai_fmt: The new DAI link format
1208 * This function updates the DAI link format for all DAIs connected to the DAI
1209 * link for the specified runtime.
1211 * Note: For setups with a static format set the dai_fmt field in the
1212 * corresponding snd_dai_link struct instead of using this function.
1214 * Returns 0 on success, otherwise a negative error code.
1216 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime
*rtd
,
1217 unsigned int dai_fmt
)
1219 struct snd_soc_dai
*cpu_dai
;
1220 struct snd_soc_dai
*codec_dai
;
1227 for_each_rtd_codec_dais(rtd
, i
, codec_dai
) {
1228 ret
= snd_soc_dai_set_fmt(codec_dai
, dai_fmt
);
1229 if (ret
!= 0 && ret
!= -ENOTSUPP
)
1233 /* Flip the polarity for the "CPU" end of link */
1234 dai_fmt
= snd_soc_daifmt_clock_provider_flipped(dai_fmt
);
1236 for_each_rtd_cpu_dais(rtd
, i
, cpu_dai
) {
1237 ret
= snd_soc_dai_set_fmt(cpu_dai
, dai_fmt
);
1238 if (ret
!= 0 && ret
!= -ENOTSUPP
)
1244 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt
);
1246 static int soc_init_pcm_runtime(struct snd_soc_card
*card
,
1247 struct snd_soc_pcm_runtime
*rtd
)
1249 struct snd_soc_dai_link
*dai_link
= rtd
->dai_link
;
1250 struct snd_soc_dai
*cpu_dai
= asoc_rtd_to_cpu(rtd
, 0);
1251 struct snd_soc_component
*component
;
1254 /* do machine specific initialization */
1255 ret
= snd_soc_link_init(rtd
);
1259 snd_soc_runtime_get_dai_fmt(rtd
);
1260 ret
= snd_soc_runtime_set_dai_fmt(rtd
, dai_link
->dai_fmt
);
1264 /* add DPCM sysfs entries */
1265 soc_dpcm_debugfs_add(rtd
);
1270 * most drivers will register their PCMs using DAI link ordering but
1271 * topology based drivers can use the DAI link id field to set PCM
1272 * device number and then use rtd + a base offset of the BEs.
1274 for_each_rtd_components(rtd
, i
, component
) {
1275 if (!component
->driver
->use_dai_pcm_id
)
1278 if (rtd
->dai_link
->no_pcm
)
1279 num
+= component
->driver
->be_pcm_base
;
1281 num
= rtd
->dai_link
->id
;
1284 /* create compress_device if possible */
1285 ret
= snd_soc_dai_compress_new(cpu_dai
, rtd
, num
);
1286 if (ret
!= -ENOTSUPP
)
1289 /* create the pcm */
1290 ret
= soc_new_pcm(rtd
, num
);
1292 dev_err(card
->dev
, "ASoC: can't create pcm %s :%d\n",
1293 dai_link
->stream_name
, ret
);
1297 return snd_soc_pcm_dai_new(rtd
);
1300 static void soc_set_name_prefix(struct snd_soc_card
*card
,
1301 struct snd_soc_component
*component
)
1303 struct device_node
*of_node
= soc_component_to_node(component
);
1307 for (i
= 0; i
< card
->num_configs
; i
++) {
1308 struct snd_soc_codec_conf
*map
= &card
->codec_conf
[i
];
1310 if (snd_soc_is_matching_component(&map
->dlc
, component
) &&
1312 component
->name_prefix
= map
->name_prefix
;
1318 * If there is no configuration table or no match in the table,
1319 * check if a prefix is provided in the node
1321 ret
= of_property_read_string(of_node
, "sound-name-prefix", &str
);
1325 component
->name_prefix
= str
;
1328 static void soc_remove_component(struct snd_soc_component
*component
,
1332 if (!component
->card
)
1336 snd_soc_component_remove(component
);
1338 list_del_init(&component
->card_list
);
1339 snd_soc_dapm_free(snd_soc_component_get_dapm(component
));
1340 soc_cleanup_component_debugfs(component
);
1341 component
->card
= NULL
;
1342 snd_soc_component_module_put_when_remove(component
);
1345 static int soc_probe_component(struct snd_soc_card
*card
,
1346 struct snd_soc_component
*component
)
1348 struct snd_soc_dapm_context
*dapm
=
1349 snd_soc_component_get_dapm(component
);
1350 struct snd_soc_dai
*dai
;
1354 if (snd_soc_component_is_dummy(component
))
1357 if (component
->card
) {
1358 if (component
->card
!= card
) {
1359 dev_err(component
->dev
,
1360 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1361 card
->name
, component
->card
->name
);
1367 ret
= snd_soc_component_module_get_when_probe(component
);
1371 component
->card
= card
;
1372 soc_set_name_prefix(card
, component
);
1374 soc_init_component_debugfs(component
);
1376 snd_soc_dapm_init(dapm
, card
, component
);
1378 ret
= snd_soc_dapm_new_controls(dapm
,
1379 component
->driver
->dapm_widgets
,
1380 component
->driver
->num_dapm_widgets
);
1383 dev_err(component
->dev
,
1384 "Failed to create new controls %d\n", ret
);
1388 for_each_component_dais(component
, dai
) {
1389 ret
= snd_soc_dapm_new_dai_widgets(dapm
, dai
);
1391 dev_err(component
->dev
,
1392 "Failed to create DAI widgets %d\n", ret
);
1397 ret
= snd_soc_component_probe(component
);
1401 WARN(dapm
->idle_bias_off
&&
1402 dapm
->bias_level
!= SND_SOC_BIAS_OFF
,
1403 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1408 * machine specific init
1410 * snd_soc_component_set_aux()
1412 ret
= snd_soc_component_init(component
);
1416 ret
= snd_soc_add_component_controls(component
,
1417 component
->driver
->controls
,
1418 component
->driver
->num_controls
);
1422 ret
= snd_soc_dapm_add_routes(dapm
,
1423 component
->driver
->dapm_routes
,
1424 component
->driver
->num_dapm_routes
);
1426 if (card
->disable_route_checks
) {
1428 "%s: disable_route_checks set, ignoring errors on add_routes\n",
1432 "%s: snd_soc_dapm_add_routes failed: %d\n",
1438 /* see for_each_card_components */
1439 list_add(&component
->card_list
, &card
->component_dev_list
);
1443 soc_remove_component(component
, probed
);
1448 static void soc_remove_link_dais(struct snd_soc_card
*card
)
1450 struct snd_soc_pcm_runtime
*rtd
;
1453 for_each_comp_order(order
) {
1454 for_each_card_rtds(card
, rtd
) {
1455 /* remove all rtd connected DAIs in good order */
1456 snd_soc_pcm_dai_remove(rtd
, order
);
1461 static int soc_probe_link_dais(struct snd_soc_card
*card
)
1463 struct snd_soc_pcm_runtime
*rtd
;
1466 for_each_comp_order(order
) {
1467 for_each_card_rtds(card
, rtd
) {
1468 /* probe all rtd connected DAIs in good order */
1469 ret
= snd_soc_pcm_dai_probe(rtd
, order
);
1478 static void soc_remove_link_components(struct snd_soc_card
*card
)
1480 struct snd_soc_component
*component
;
1481 struct snd_soc_pcm_runtime
*rtd
;
1484 for_each_comp_order(order
) {
1485 for_each_card_rtds(card
, rtd
) {
1486 for_each_rtd_components(rtd
, i
, component
) {
1487 if (component
->driver
->remove_order
!= order
)
1490 soc_remove_component(component
, 1);
1496 static int soc_probe_link_components(struct snd_soc_card
*card
)
1498 struct snd_soc_component
*component
;
1499 struct snd_soc_pcm_runtime
*rtd
;
1502 for_each_comp_order(order
) {
1503 for_each_card_rtds(card
, rtd
) {
1504 for_each_rtd_components(rtd
, i
, component
) {
1505 if (component
->driver
->probe_order
!= order
)
1508 ret
= soc_probe_component(card
, component
);
1518 static void soc_unbind_aux_dev(struct snd_soc_card
*card
)
1520 struct snd_soc_component
*component
, *_component
;
1522 for_each_card_auxs_safe(card
, component
, _component
) {
1523 /* for snd_soc_component_init() */
1524 snd_soc_component_set_aux(component
, NULL
);
1525 list_del(&component
->card_aux_list
);
1529 static int soc_bind_aux_dev(struct snd_soc_card
*card
)
1531 struct snd_soc_component
*component
;
1532 struct snd_soc_aux_dev
*aux
;
1535 for_each_card_pre_auxs(card
, i
, aux
) {
1536 /* codecs, usually analog devices */
1537 component
= soc_find_component(&aux
->dlc
);
1539 return -EPROBE_DEFER
;
1541 /* for snd_soc_component_init() */
1542 snd_soc_component_set_aux(component
, aux
);
1543 /* see for_each_card_auxs */
1544 list_add(&component
->card_aux_list
, &card
->aux_comp_list
);
1549 static int soc_probe_aux_devices(struct snd_soc_card
*card
)
1551 struct snd_soc_component
*component
;
1555 for_each_comp_order(order
) {
1556 for_each_card_auxs(card
, component
) {
1557 if (component
->driver
->probe_order
!= order
)
1560 ret
= soc_probe_component(card
, component
);
1569 static void soc_remove_aux_devices(struct snd_soc_card
*card
)
1571 struct snd_soc_component
*comp
, *_comp
;
1574 for_each_comp_order(order
) {
1575 for_each_card_auxs_safe(card
, comp
, _comp
) {
1576 if (comp
->driver
->remove_order
== order
)
1577 soc_remove_component(comp
, 1);
1584 * If a DMI filed contain strings in this blacklist (e.g.
1585 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
1586 * as invalid and dropped when setting the card long name from DMI info.
1588 static const char * const dmi_blacklist
[] = {
1589 "To be filled by OEM",
1592 "Board Manufacturer",
1593 "Board Vendor Name",
1594 "Board Product Name",
1595 NULL
, /* terminator */
1599 * Trim special characters, and replace '-' with '_' since '-' is used to
1600 * separate different DMI fields in the card long name. Only number and
1601 * alphabet characters and a few separator characters are kept.
1603 static void cleanup_dmi_name(char *name
)
1607 for (i
= 0; name
[i
]; i
++) {
1608 if (isalnum(name
[i
]) || (name
[i
] == '.')
1609 || (name
[i
] == '_'))
1610 name
[j
++] = name
[i
];
1611 else if (name
[i
] == '-')
1619 * Check if a DMI field is valid, i.e. not containing any string
1620 * in the black list.
1622 static int is_dmi_valid(const char *field
)
1626 while (dmi_blacklist
[i
]) {
1627 if (strstr(field
, dmi_blacklist
[i
]))
1636 * Append a string to card->dmi_longname with character cleanups.
1638 static void append_dmi_string(struct snd_soc_card
*card
, const char *str
)
1640 char *dst
= card
->dmi_longname
;
1641 size_t dst_len
= sizeof(card
->dmi_longname
);
1645 snprintf(dst
+ len
, dst_len
- len
, "-%s", str
);
1647 len
++; /* skip the separator "-" */
1649 cleanup_dmi_name(dst
+ len
);
1653 * snd_soc_set_dmi_name() - Register DMI names to card
1654 * @card: The card to register DMI names
1655 * @flavour: The flavour "differentiator" for the card amongst its peers.
1657 * An Intel machine driver may be used by many different devices but are
1658 * difficult for userspace to differentiate, since machine drivers ususally
1659 * use their own name as the card short name and leave the card long name
1660 * blank. To differentiate such devices and fix bugs due to lack of
1661 * device-specific configurations, this function allows DMI info to be used
1662 * as the sound card long name, in the format of
1663 * "vendor-product-version-board"
1664 * (Character '-' is used to separate different DMI fields here).
1665 * This will help the user space to load the device-specific Use Case Manager
1666 * (UCM) configurations for the card.
1668 * Possible card long names may be:
1669 * DellInc.-XPS139343-01-0310JH
1670 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1671 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1673 * This function also supports flavoring the card longname to provide
1674 * the extra differentiation, like "vendor-product-version-board-flavor".
1676 * We only keep number and alphabet characters and a few separator characters
1677 * in the card long name since UCM in the user space uses the card long names
1678 * as card configuration directory names and AudoConf cannot support special
1679 * charactors like SPACE.
1681 * Returns 0 on success, otherwise a negative error code.
1683 int snd_soc_set_dmi_name(struct snd_soc_card
*card
, const char *flavour
)
1685 const char *vendor
, *product
, *board
;
1687 if (card
->long_name
)
1688 return 0; /* long name already set by driver or from DMI */
1693 /* make up dmi long name as: vendor-product-version-board */
1694 vendor
= dmi_get_system_info(DMI_BOARD_VENDOR
);
1695 if (!vendor
|| !is_dmi_valid(vendor
)) {
1696 dev_warn(card
->dev
, "ASoC: no DMI vendor name!\n");
1700 snprintf(card
->dmi_longname
, sizeof(card
->dmi_longname
), "%s", vendor
);
1701 cleanup_dmi_name(card
->dmi_longname
);
1703 product
= dmi_get_system_info(DMI_PRODUCT_NAME
);
1704 if (product
&& is_dmi_valid(product
)) {
1705 const char *product_version
= dmi_get_system_info(DMI_PRODUCT_VERSION
);
1707 append_dmi_string(card
, product
);
1710 * some vendors like Lenovo may only put a self-explanatory
1711 * name in the product version field
1713 if (product_version
&& is_dmi_valid(product_version
))
1714 append_dmi_string(card
, product_version
);
1717 board
= dmi_get_system_info(DMI_BOARD_NAME
);
1718 if (board
&& is_dmi_valid(board
)) {
1719 if (!product
|| strcasecmp(board
, product
))
1720 append_dmi_string(card
, board
);
1721 } else if (!product
) {
1722 /* fall back to using legacy name */
1723 dev_warn(card
->dev
, "ASoC: no DMI board/product name!\n");
1727 /* Add flavour to dmi long name */
1729 append_dmi_string(card
, flavour
);
1731 /* set the card long name */
1732 card
->long_name
= card
->dmi_longname
;
1736 EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name
);
1737 #endif /* CONFIG_DMI */
1739 static void soc_check_tplg_fes(struct snd_soc_card
*card
)
1741 struct snd_soc_component
*component
;
1742 const struct snd_soc_component_driver
*comp_drv
;
1743 struct snd_soc_dai_link
*dai_link
;
1746 for_each_component(component
) {
1748 /* does this component override BEs ? */
1749 if (!component
->driver
->ignore_machine
)
1752 /* for this machine ? */
1753 if (!strcmp(component
->driver
->ignore_machine
,
1754 card
->dev
->driver
->name
))
1756 if (strcmp(component
->driver
->ignore_machine
,
1757 dev_name(card
->dev
)))
1760 /* machine matches, so override the rtd data */
1761 for_each_card_prelinks(card
, i
, dai_link
) {
1763 /* ignore this FE */
1764 if (dai_link
->dynamic
) {
1765 dai_link
->ignore
= true;
1769 dev_dbg(card
->dev
, "info: override BE DAI link %s\n",
1770 card
->dai_link
[i
].name
);
1772 /* override platform component */
1773 if (!dai_link
->platforms
) {
1774 dev_err(card
->dev
, "init platform error");
1778 if (component
->dev
->of_node
)
1779 dai_link
->platforms
->of_node
= component
->dev
->of_node
;
1781 dai_link
->platforms
->name
= component
->name
;
1783 /* convert non BE into BE */
1784 if (!dai_link
->no_pcm
) {
1785 dai_link
->no_pcm
= 1;
1787 if (dai_link
->dpcm_playback
)
1789 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_playback=1\n",
1791 if (dai_link
->dpcm_capture
)
1793 "invalid configuration, dailink %s has flags no_pcm=0 and dpcm_capture=1\n",
1796 /* convert normal link into DPCM one */
1797 if (!(dai_link
->dpcm_playback
||
1798 dai_link
->dpcm_capture
)) {
1799 dai_link
->dpcm_playback
= !dai_link
->capture_only
;
1800 dai_link
->dpcm_capture
= !dai_link
->playback_only
;
1805 * override any BE fixups
1807 * snd_soc_link_be_hw_params_fixup()
1809 dai_link
->be_hw_params_fixup
=
1810 component
->driver
->be_hw_params_fixup
;
1813 * most BE links don't set stream name, so set it to
1814 * dai link name if it's NULL to help bind widgets.
1816 if (!dai_link
->stream_name
)
1817 dai_link
->stream_name
= dai_link
->name
;
1820 /* Inform userspace we are using alternate topology */
1821 if (component
->driver
->topology_name_prefix
) {
1823 /* topology shortname created? */
1824 if (!card
->topology_shortname_created
) {
1825 comp_drv
= component
->driver
;
1827 snprintf(card
->topology_shortname
, 32, "%s-%s",
1828 comp_drv
->topology_name_prefix
,
1830 card
->topology_shortname_created
= true;
1833 /* use topology shortname */
1834 card
->name
= card
->topology_shortname
;
1839 #define soc_setup_card_name(card, name, name1, name2) \
1840 __soc_setup_card_name(card, name, sizeof(name), name1, name2)
1841 static void __soc_setup_card_name(struct snd_soc_card
*card
,
1842 char *name
, int len
,
1843 const char *name1
, const char *name2
)
1845 const char *src
= name1
? name1
: name2
;
1848 snprintf(name
, len
, "%s", src
);
1850 if (name
!= card
->snd_card
->driver
)
1854 * Name normalization (driver field)
1856 * The driver name is somewhat special, as it's used as a key for
1857 * searches in the user-space.
1860 * "abcd??efg" -> "abcd__efg"
1862 for (i
= 0; i
< len
; i
++) {
1869 if (!isalnum(name
[i
]))
1876 * The driver field should contain a valid string from the user view.
1877 * The wrapping usually does not work so well here. Set a smaller string
1878 * in the specific ASoC driver.
1880 if (strlen(src
) > len
- 1)
1881 dev_err(card
->dev
, "ASoC: driver name too long '%s' -> '%s'\n", src
, name
);
1884 static void soc_cleanup_card_resources(struct snd_soc_card
*card
)
1886 struct snd_soc_pcm_runtime
*rtd
, *n
;
1889 snd_card_disconnect_sync(card
->snd_card
);
1891 snd_soc_dapm_shutdown(card
);
1893 /* release machine specific resources */
1894 for_each_card_rtds(card
, rtd
)
1895 snd_soc_link_exit(rtd
);
1896 /* remove and free each DAI */
1897 soc_remove_link_dais(card
);
1898 soc_remove_link_components(card
);
1900 for_each_card_rtds_safe(card
, rtd
, n
)
1901 snd_soc_remove_pcm_runtime(card
, rtd
);
1903 /* remove auxiliary devices */
1904 soc_remove_aux_devices(card
);
1905 soc_unbind_aux_dev(card
);
1907 snd_soc_dapm_free(&card
->dapm
);
1908 soc_cleanup_card_debugfs(card
);
1910 /* remove the card */
1911 snd_soc_card_remove(card
);
1913 if (card
->snd_card
) {
1914 snd_card_free(card
->snd_card
);
1915 card
->snd_card
= NULL
;
1919 static void snd_soc_unbind_card(struct snd_soc_card
*card
, bool unregister
)
1921 if (snd_soc_card_is_instantiated(card
)) {
1922 card
->instantiated
= false;
1923 snd_soc_flush_all_delayed_work(card
);
1925 soc_cleanup_card_resources(card
);
1927 list_add(&card
->list
, &unbind_card_list
);
1930 list_del(&card
->list
);
1934 static int snd_soc_bind_card(struct snd_soc_card
*card
)
1936 struct snd_soc_pcm_runtime
*rtd
;
1937 struct snd_soc_component
*component
;
1940 mutex_lock(&client_mutex
);
1941 snd_soc_card_mutex_lock_root(card
);
1943 snd_soc_dapm_init(&card
->dapm
, card
, NULL
);
1945 /* check whether any platform is ignore machine FE and using topology */
1946 soc_check_tplg_fes(card
);
1948 /* bind aux_devs too */
1949 ret
= soc_bind_aux_dev(card
);
1953 /* add predefined DAI links to the list */
1955 ret
= snd_soc_add_pcm_runtimes(card
, card
->dai_link
, card
->num_links
);
1959 /* card bind complete so register a sound card */
1960 ret
= snd_card_new(card
->dev
, SNDRV_DEFAULT_IDX1
, SNDRV_DEFAULT_STR1
,
1961 card
->owner
, 0, &card
->snd_card
);
1964 "ASoC: can't create sound card for card %s: %d\n",
1969 soc_init_card_debugfs(card
);
1971 soc_resume_init(card
);
1973 ret
= snd_soc_dapm_new_controls(&card
->dapm
, card
->dapm_widgets
,
1974 card
->num_dapm_widgets
);
1978 ret
= snd_soc_dapm_new_controls(&card
->dapm
, card
->of_dapm_widgets
,
1979 card
->num_of_dapm_widgets
);
1983 /* initialise the sound card only once */
1984 ret
= snd_soc_card_probe(card
);
1988 /* probe all components used by DAI links on this card */
1989 ret
= soc_probe_link_components(card
);
1992 "ASoC: failed to instantiate card %d\n", ret
);
1996 /* probe auxiliary components */
1997 ret
= soc_probe_aux_devices(card
);
2000 "ASoC: failed to probe aux component %d\n", ret
);
2004 /* probe all DAI links on this card */
2005 ret
= soc_probe_link_dais(card
);
2008 "ASoC: failed to instantiate card %d\n", ret
);
2012 for_each_card_rtds(card
, rtd
) {
2013 ret
= soc_init_pcm_runtime(card
, rtd
);
2018 snd_soc_dapm_link_dai_widgets(card
);
2019 snd_soc_dapm_connect_dai_link_widgets(card
);
2021 ret
= snd_soc_add_card_controls(card
, card
->controls
,
2022 card
->num_controls
);
2026 ret
= snd_soc_dapm_add_routes(&card
->dapm
, card
->dapm_routes
,
2027 card
->num_dapm_routes
);
2029 if (card
->disable_route_checks
) {
2031 "%s: disable_route_checks set, ignoring errors on add_routes\n",
2035 "%s: snd_soc_dapm_add_routes failed: %d\n",
2041 ret
= snd_soc_dapm_add_routes(&card
->dapm
, card
->of_dapm_routes
,
2042 card
->num_of_dapm_routes
);
2046 /* try to set some sane longname if DMI is available */
2047 snd_soc_set_dmi_name(card
, NULL
);
2049 soc_setup_card_name(card
, card
->snd_card
->shortname
,
2051 soc_setup_card_name(card
, card
->snd_card
->longname
,
2052 card
->long_name
, card
->name
);
2053 soc_setup_card_name(card
, card
->snd_card
->driver
,
2054 card
->driver_name
, card
->name
);
2056 if (card
->components
) {
2057 /* the current implementation of snd_component_add() accepts */
2058 /* multiple components in the string separated by space, */
2059 /* but the string collision (identical string) check might */
2060 /* not work correctly */
2061 ret
= snd_component_add(card
->snd_card
, card
->components
);
2063 dev_err(card
->dev
, "ASoC: %s snd_component_add() failed: %d\n",
2069 ret
= snd_soc_card_late_probe(card
);
2073 snd_soc_dapm_new_widgets(card
);
2074 snd_soc_card_fixup_controls(card
);
2076 ret
= snd_card_register(card
->snd_card
);
2078 dev_err(card
->dev
, "ASoC: failed to register soundcard %d\n",
2083 card
->instantiated
= 1;
2084 dapm_mark_endpoints_dirty(card
);
2085 snd_soc_dapm_sync(&card
->dapm
);
2087 /* deactivate pins to sleep state */
2088 for_each_card_components(card
, component
)
2089 if (!snd_soc_component_active(component
))
2090 pinctrl_pm_select_sleep_state(component
->dev
);
2094 soc_cleanup_card_resources(card
);
2096 snd_soc_card_mutex_unlock(card
);
2097 mutex_unlock(&client_mutex
);
2102 /* probes a new socdev */
2103 static int soc_probe(struct platform_device
*pdev
)
2105 struct snd_soc_card
*card
= platform_get_drvdata(pdev
);
2108 * no card, so machine driver should be registering card
2109 * we should not be here in that case so ret error
2114 dev_warn(&pdev
->dev
,
2115 "ASoC: machine %s should use snd_soc_register_card()\n",
2118 /* Bodge while we unpick instantiation */
2119 card
->dev
= &pdev
->dev
;
2121 return devm_snd_soc_register_card(&pdev
->dev
, card
);
2124 int snd_soc_poweroff(struct device
*dev
)
2126 struct snd_soc_card
*card
= dev_get_drvdata(dev
);
2127 struct snd_soc_component
*component
;
2129 if (!snd_soc_card_is_instantiated(card
))
2133 * Flush out pmdown_time work - we actually do want to run it
2134 * now, we're shutting down so no imminent restart.
2136 snd_soc_flush_all_delayed_work(card
);
2138 snd_soc_dapm_shutdown(card
);
2140 /* deactivate pins to sleep state */
2141 for_each_card_components(card
, component
)
2142 pinctrl_pm_select_sleep_state(component
->dev
);
2146 EXPORT_SYMBOL_GPL(snd_soc_poweroff
);
2148 const struct dev_pm_ops snd_soc_pm_ops
= {
2149 .suspend
= snd_soc_suspend
,
2150 .resume
= snd_soc_resume
,
2151 .freeze
= snd_soc_suspend
,
2152 .thaw
= snd_soc_resume
,
2153 .poweroff
= snd_soc_poweroff
,
2154 .restore
= snd_soc_resume
,
2156 EXPORT_SYMBOL_GPL(snd_soc_pm_ops
);
2158 /* ASoC platform driver */
2159 static struct platform_driver soc_driver
= {
2161 .name
= "soc-audio",
2162 .pm
= &snd_soc_pm_ops
,
2168 * snd_soc_cnew - create new control
2169 * @_template: control template
2170 * @data: control private data
2171 * @long_name: control long name
2172 * @prefix: control name prefix
2174 * Create a new mixer control from a template control.
2176 * Returns 0 for success, else error.
2178 struct snd_kcontrol
*snd_soc_cnew(const struct snd_kcontrol_new
*_template
,
2179 void *data
, const char *long_name
,
2182 struct snd_kcontrol_new
template;
2183 struct snd_kcontrol
*kcontrol
;
2186 memcpy(&template, _template
, sizeof(template));
2190 long_name
= template.name
;
2193 name
= kasprintf(GFP_KERNEL
, "%s %s", prefix
, long_name
);
2197 template.name
= name
;
2199 template.name
= long_name
;
2202 kcontrol
= snd_ctl_new1(&template, data
);
2208 EXPORT_SYMBOL_GPL(snd_soc_cnew
);
2210 static int snd_soc_add_controls(struct snd_card
*card
, struct device
*dev
,
2211 const struct snd_kcontrol_new
*controls
, int num_controls
,
2212 const char *prefix
, void *data
)
2216 for (i
= 0; i
< num_controls
; i
++) {
2217 const struct snd_kcontrol_new
*control
= &controls
[i
];
2218 int err
= snd_ctl_add(card
, snd_soc_cnew(control
, data
,
2219 control
->name
, prefix
));
2221 dev_err(dev
, "ASoC: Failed to add %s: %d\n",
2222 control
->name
, err
);
2231 * snd_soc_add_component_controls - Add an array of controls to a component.
2233 * @component: Component to add controls to
2234 * @controls: Array of controls to add
2235 * @num_controls: Number of elements in the array
2237 * Return: 0 for success, else error.
2239 int snd_soc_add_component_controls(struct snd_soc_component
*component
,
2240 const struct snd_kcontrol_new
*controls
, unsigned int num_controls
)
2242 struct snd_card
*card
= component
->card
->snd_card
;
2244 return snd_soc_add_controls(card
, component
->dev
, controls
,
2245 num_controls
, component
->name_prefix
, component
);
2247 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls
);
2250 * snd_soc_add_card_controls - add an array of controls to a SoC card.
2251 * Convenience function to add a list of controls.
2253 * @soc_card: SoC card to add controls to
2254 * @controls: array of controls to add
2255 * @num_controls: number of elements in the array
2257 * Return 0 for success, else error.
2259 int snd_soc_add_card_controls(struct snd_soc_card
*soc_card
,
2260 const struct snd_kcontrol_new
*controls
, int num_controls
)
2262 struct snd_card
*card
= soc_card
->snd_card
;
2264 return snd_soc_add_controls(card
, soc_card
->dev
, controls
, num_controls
,
2267 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls
);
2270 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2271 * Convienience function to add a list of controls.
2273 * @dai: DAI to add controls to
2274 * @controls: array of controls to add
2275 * @num_controls: number of elements in the array
2277 * Return 0 for success, else error.
2279 int snd_soc_add_dai_controls(struct snd_soc_dai
*dai
,
2280 const struct snd_kcontrol_new
*controls
, int num_controls
)
2282 struct snd_card
*card
= dai
->component
->card
->snd_card
;
2284 return snd_soc_add_controls(card
, dai
->dev
, controls
, num_controls
,
2287 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls
);
2290 * snd_soc_register_card - Register a card with the ASoC core
2292 * @card: Card to register
2295 int snd_soc_register_card(struct snd_soc_card
*card
)
2297 if (!card
->name
|| !card
->dev
)
2300 dev_set_drvdata(card
->dev
, card
);
2302 INIT_LIST_HEAD(&card
->widgets
);
2303 INIT_LIST_HEAD(&card
->paths
);
2304 INIT_LIST_HEAD(&card
->dapm_list
);
2305 INIT_LIST_HEAD(&card
->aux_comp_list
);
2306 INIT_LIST_HEAD(&card
->component_dev_list
);
2307 INIT_LIST_HEAD(&card
->list
);
2308 INIT_LIST_HEAD(&card
->rtd_list
);
2309 INIT_LIST_HEAD(&card
->dapm_dirty
);
2310 INIT_LIST_HEAD(&card
->dobj_list
);
2312 card
->instantiated
= 0;
2313 mutex_init(&card
->mutex
);
2314 mutex_init(&card
->dapm_mutex
);
2315 mutex_init(&card
->pcm_mutex
);
2317 return snd_soc_bind_card(card
);
2319 EXPORT_SYMBOL_GPL(snd_soc_register_card
);
2322 * snd_soc_unregister_card - Unregister a card with the ASoC core
2324 * @card: Card to unregister
2327 void snd_soc_unregister_card(struct snd_soc_card
*card
)
2329 mutex_lock(&client_mutex
);
2330 snd_soc_unbind_card(card
, true);
2331 mutex_unlock(&client_mutex
);
2332 dev_dbg(card
->dev
, "ASoC: Unregistered card '%s'\n", card
->name
);
2334 EXPORT_SYMBOL_GPL(snd_soc_unregister_card
);
2337 * Simplify DAI link configuration by removing ".-1" from device names
2338 * and sanitizing names.
2340 static char *fmt_single_name(struct device
*dev
, int *id
)
2342 const char *devname
= dev_name(dev
);
2344 unsigned int id1
, id2
;
2346 if (devname
== NULL
)
2349 name
= devm_kstrdup(dev
, devname
, GFP_KERNEL
);
2353 /* are we a "%s.%d" name (platform and SPI components) */
2354 found
= strstr(name
, dev
->driver
->name
);
2357 if (sscanf(&found
[strlen(dev
->driver
->name
)], ".%d", id
) == 1) {
2359 /* discard ID from name if ID == -1 */
2361 found
[strlen(dev
->driver
->name
)] = '\0';
2364 /* I2C component devices are named "bus-addr" */
2365 } else if (sscanf(name
, "%x-%x", &id1
, &id2
) == 2) {
2367 /* create unique ID number from I2C addr and bus */
2368 *id
= ((id1
& 0xffff) << 16) + id2
;
2370 devm_kfree(dev
, name
);
2372 /* sanitize component name for DAI link creation */
2373 name
= devm_kasprintf(dev
, GFP_KERNEL
, "%s.%s", dev
->driver
->name
, devname
);
2382 * Simplify DAI link naming for single devices with multiple DAIs by removing
2383 * any ".-1" and using the DAI name (instead of device name).
2385 static inline char *fmt_multiple_name(struct device
*dev
,
2386 struct snd_soc_dai_driver
*dai_drv
)
2388 if (dai_drv
->name
== NULL
) {
2390 "ASoC: error - multiple DAI %s registered with no name\n",
2395 return devm_kstrdup(dev
, dai_drv
->name
, GFP_KERNEL
);
2398 void snd_soc_unregister_dai(struct snd_soc_dai
*dai
)
2400 dev_dbg(dai
->dev
, "ASoC: Unregistered DAI '%s'\n", dai
->name
);
2401 list_del(&dai
->list
);
2403 EXPORT_SYMBOL_GPL(snd_soc_unregister_dai
);
2406 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
2408 * @component: The component the DAIs are registered for
2409 * @dai_drv: DAI driver to use for the DAI
2410 * @legacy_dai_naming: if %true, use legacy single-name format;
2411 * if %false, use multiple-name format;
2413 * Topology can use this API to register DAIs when probing a component.
2414 * These DAIs's widgets will be freed in the card cleanup and the DAIs
2415 * will be freed in the component cleanup.
2417 struct snd_soc_dai
*snd_soc_register_dai(struct snd_soc_component
*component
,
2418 struct snd_soc_dai_driver
*dai_drv
,
2419 bool legacy_dai_naming
)
2421 struct device
*dev
= component
->dev
;
2422 struct snd_soc_dai
*dai
;
2424 lockdep_assert_held(&client_mutex
);
2426 dai
= devm_kzalloc(dev
, sizeof(*dai
), GFP_KERNEL
);
2431 * Back in the old days when we still had component-less DAIs,
2432 * instead of having a static name, component-less DAIs would
2433 * inherit the name of the parent device so it is possible to
2434 * register multiple instances of the DAI. We still need to keep
2435 * the same naming style even though those DAIs are not
2436 * component-less anymore.
2438 if (legacy_dai_naming
&&
2439 (dai_drv
->id
== 0 || dai_drv
->name
== NULL
)) {
2440 dai
->name
= fmt_single_name(dev
, &dai
->id
);
2442 dai
->name
= fmt_multiple_name(dev
, dai_drv
);
2444 dai
->id
= dai_drv
->id
;
2446 dai
->id
= component
->num_dai
;
2451 dai
->component
= component
;
2453 dai
->driver
= dai_drv
;
2455 /* see for_each_component_dais */
2456 list_add_tail(&dai
->list
, &component
->dai_list
);
2457 component
->num_dai
++;
2459 dev_dbg(dev
, "ASoC: Registered DAI '%s'\n", dai
->name
);
2462 EXPORT_SYMBOL_GPL(snd_soc_register_dai
);
2465 * snd_soc_unregister_dais - Unregister DAIs from the ASoC core
2467 * @component: The component for which the DAIs should be unregistered
2469 static void snd_soc_unregister_dais(struct snd_soc_component
*component
)
2471 struct snd_soc_dai
*dai
, *_dai
;
2473 for_each_component_dais_safe(component
, dai
, _dai
)
2474 snd_soc_unregister_dai(dai
);
2478 * snd_soc_register_dais - Register a DAI with the ASoC core
2480 * @component: The component the DAIs are registered for
2481 * @dai_drv: DAI driver to use for the DAIs
2482 * @count: Number of DAIs
2484 static int snd_soc_register_dais(struct snd_soc_component
*component
,
2485 struct snd_soc_dai_driver
*dai_drv
,
2488 struct snd_soc_dai
*dai
;
2492 for (i
= 0; i
< count
; i
++) {
2493 dai
= snd_soc_register_dai(component
, dai_drv
+ i
, count
== 1 &&
2494 component
->driver
->legacy_dai_naming
);
2504 snd_soc_unregister_dais(component
);
2509 #define ENDIANNESS_MAP(name) \
2510 (SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2511 static u64 endianness_format_map
[] = {
2512 ENDIANNESS_MAP(S16_
),
2513 ENDIANNESS_MAP(U16_
),
2514 ENDIANNESS_MAP(S24_
),
2515 ENDIANNESS_MAP(U24_
),
2516 ENDIANNESS_MAP(S32_
),
2517 ENDIANNESS_MAP(U32_
),
2518 ENDIANNESS_MAP(S24_3
),
2519 ENDIANNESS_MAP(U24_3
),
2520 ENDIANNESS_MAP(S20_3
),
2521 ENDIANNESS_MAP(U20_3
),
2522 ENDIANNESS_MAP(S18_3
),
2523 ENDIANNESS_MAP(U18_3
),
2524 ENDIANNESS_MAP(FLOAT_
),
2525 ENDIANNESS_MAP(FLOAT64_
),
2526 ENDIANNESS_MAP(IEC958_SUBFRAME_
),
2530 * Fix up the DAI formats for endianness: codecs don't actually see
2531 * the endianness of the data but we're using the CPU format
2532 * definitions which do need to include endianness so we ensure that
2533 * codec DAIs always have both big and little endian variants set.
2535 static void convert_endianness_formats(struct snd_soc_pcm_stream
*stream
)
2539 for (i
= 0; i
< ARRAY_SIZE(endianness_format_map
); i
++)
2540 if (stream
->formats
& endianness_format_map
[i
])
2541 stream
->formats
|= endianness_format_map
[i
];
2544 static void snd_soc_try_rebind_card(void)
2546 struct snd_soc_card
*card
, *c
;
2548 list_for_each_entry_safe(card
, c
, &unbind_card_list
, list
)
2549 if (!snd_soc_bind_card(card
))
2550 list_del(&card
->list
);
2553 static void snd_soc_del_component_unlocked(struct snd_soc_component
*component
)
2555 struct snd_soc_card
*card
= component
->card
;
2557 snd_soc_unregister_dais(component
);
2560 snd_soc_unbind_card(card
, false);
2562 list_del(&component
->list
);
2565 int snd_soc_component_initialize(struct snd_soc_component
*component
,
2566 const struct snd_soc_component_driver
*driver
,
2569 INIT_LIST_HEAD(&component
->dai_list
);
2570 INIT_LIST_HEAD(&component
->dobj_list
);
2571 INIT_LIST_HEAD(&component
->card_list
);
2572 INIT_LIST_HEAD(&component
->list
);
2573 mutex_init(&component
->io_mutex
);
2575 component
->name
= fmt_single_name(dev
, &component
->id
);
2576 if (!component
->name
) {
2577 dev_err(dev
, "ASoC: Failed to allocate name\n");
2581 component
->dev
= dev
;
2582 component
->driver
= driver
;
2584 #ifdef CONFIG_DEBUG_FS
2585 if (!component
->debugfs_prefix
)
2586 component
->debugfs_prefix
= driver
->debugfs_prefix
;
2591 EXPORT_SYMBOL_GPL(snd_soc_component_initialize
);
2593 int snd_soc_add_component(struct snd_soc_component
*component
,
2594 struct snd_soc_dai_driver
*dai_drv
,
2600 mutex_lock(&client_mutex
);
2602 if (component
->driver
->endianness
) {
2603 for (i
= 0; i
< num_dai
; i
++) {
2604 convert_endianness_formats(&dai_drv
[i
].playback
);
2605 convert_endianness_formats(&dai_drv
[i
].capture
);
2609 ret
= snd_soc_register_dais(component
, dai_drv
, num_dai
);
2611 dev_err(component
->dev
, "ASoC: Failed to register DAIs: %d\n",
2616 if (!component
->driver
->write
&& !component
->driver
->read
) {
2617 if (!component
->regmap
)
2618 component
->regmap
= dev_get_regmap(component
->dev
,
2620 if (component
->regmap
)
2621 snd_soc_component_setup_regmap(component
);
2624 /* see for_each_component */
2625 list_add(&component
->list
, &component_list
);
2629 snd_soc_del_component_unlocked(component
);
2631 mutex_unlock(&client_mutex
);
2634 snd_soc_try_rebind_card();
2638 EXPORT_SYMBOL_GPL(snd_soc_add_component
);
2640 int snd_soc_register_component(struct device
*dev
,
2641 const struct snd_soc_component_driver
*component_driver
,
2642 struct snd_soc_dai_driver
*dai_drv
,
2645 struct snd_soc_component
*component
;
2648 component
= devm_kzalloc(dev
, sizeof(*component
), GFP_KERNEL
);
2652 ret
= snd_soc_component_initialize(component
, component_driver
, dev
);
2656 return snd_soc_add_component(component
, dai_drv
, num_dai
);
2658 EXPORT_SYMBOL_GPL(snd_soc_register_component
);
2661 * snd_soc_unregister_component_by_driver - Unregister component using a given driver
2662 * from the ASoC core
2664 * @dev: The device to unregister
2665 * @component_driver: The component driver to unregister
2667 void snd_soc_unregister_component_by_driver(struct device
*dev
,
2668 const struct snd_soc_component_driver
*component_driver
)
2670 struct snd_soc_component
*component
;
2672 if (!component_driver
)
2675 mutex_lock(&client_mutex
);
2676 component
= snd_soc_lookup_component_nolocked(dev
, component_driver
->name
);
2680 snd_soc_del_component_unlocked(component
);
2683 mutex_unlock(&client_mutex
);
2685 EXPORT_SYMBOL_GPL(snd_soc_unregister_component_by_driver
);
2688 * snd_soc_unregister_component - Unregister all related component
2689 * from the ASoC core
2691 * @dev: The device to unregister
2693 void snd_soc_unregister_component(struct device
*dev
)
2695 mutex_lock(&client_mutex
);
2697 struct snd_soc_component
*component
= snd_soc_lookup_component_nolocked(dev
, NULL
);
2702 snd_soc_del_component_unlocked(component
);
2704 mutex_unlock(&client_mutex
);
2706 EXPORT_SYMBOL_GPL(snd_soc_unregister_component
);
2708 /* Retrieve a card's name from device tree */
2709 int snd_soc_of_parse_card_name(struct snd_soc_card
*card
,
2710 const char *propname
)
2712 struct device_node
*np
;
2716 pr_err("card->dev is not set before calling %s\n", __func__
);
2720 np
= card
->dev
->of_node
;
2722 ret
= of_property_read_string_index(np
, propname
, 0, &card
->name
);
2724 * EINVAL means the property does not exist. This is fine providing
2725 * card->name was previously set, which is checked later in
2726 * snd_soc_register_card.
2728 if (ret
< 0 && ret
!= -EINVAL
) {
2730 "ASoC: Property '%s' could not be read: %d\n",
2737 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name
);
2739 static const struct snd_soc_dapm_widget simple_widgets
[] = {
2740 SND_SOC_DAPM_MIC("Microphone", NULL
),
2741 SND_SOC_DAPM_LINE("Line", NULL
),
2742 SND_SOC_DAPM_HP("Headphone", NULL
),
2743 SND_SOC_DAPM_SPK("Speaker", NULL
),
2746 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card
*card
,
2747 const char *propname
)
2749 struct device_node
*np
= card
->dev
->of_node
;
2750 struct snd_soc_dapm_widget
*widgets
;
2751 const char *template, *wname
;
2752 int i
, j
, num_widgets
;
2754 num_widgets
= of_property_count_strings(np
, propname
);
2755 if (num_widgets
< 0) {
2757 "ASoC: Property '%s' does not exist\n", propname
);
2761 dev_err(card
->dev
, "ASoC: Property '%s's length is zero\n",
2765 if (num_widgets
& 1) {
2767 "ASoC: Property '%s' length is not even\n", propname
);
2773 widgets
= devm_kcalloc(card
->dev
, num_widgets
, sizeof(*widgets
),
2777 "ASoC: Could not allocate memory for widgets\n");
2781 for (i
= 0; i
< num_widgets
; i
++) {
2782 int ret
= of_property_read_string_index(np
, propname
,
2786 "ASoC: Property '%s' index %d read error:%d\n",
2787 propname
, 2 * i
, ret
);
2791 for (j
= 0; j
< ARRAY_SIZE(simple_widgets
); j
++) {
2792 if (!strncmp(template, simple_widgets
[j
].name
,
2793 strlen(simple_widgets
[j
].name
))) {
2794 widgets
[i
] = simple_widgets
[j
];
2799 if (j
>= ARRAY_SIZE(simple_widgets
)) {
2801 "ASoC: DAPM widget '%s' is not supported\n",
2806 ret
= of_property_read_string_index(np
, propname
,
2811 "ASoC: Property '%s' index %d read error:%d\n",
2812 propname
, (2 * i
) + 1, ret
);
2816 widgets
[i
].name
= wname
;
2819 card
->of_dapm_widgets
= widgets
;
2820 card
->num_of_dapm_widgets
= num_widgets
;
2824 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets
);
2826 int snd_soc_of_parse_pin_switches(struct snd_soc_card
*card
, const char *prop
)
2828 const unsigned int nb_controls_max
= 16;
2829 const char **strings
, *control_name
;
2830 struct snd_kcontrol_new
*controls
;
2831 struct device
*dev
= card
->dev
;
2832 unsigned int i
, nb_controls
;
2835 if (!of_property_read_bool(dev
->of_node
, prop
))
2838 strings
= devm_kcalloc(dev
, nb_controls_max
,
2839 sizeof(*strings
), GFP_KERNEL
);
2843 ret
= of_property_read_string_array(dev
->of_node
, prop
,
2844 strings
, nb_controls_max
);
2848 nb_controls
= (unsigned int)ret
;
2850 controls
= devm_kcalloc(dev
, nb_controls
,
2851 sizeof(*controls
), GFP_KERNEL
);
2855 for (i
= 0; i
< nb_controls
; i
++) {
2856 control_name
= devm_kasprintf(dev
, GFP_KERNEL
,
2857 "%s Switch", strings
[i
]);
2861 controls
[i
].iface
= SNDRV_CTL_ELEM_IFACE_MIXER
;
2862 controls
[i
].name
= control_name
;
2863 controls
[i
].info
= snd_soc_dapm_info_pin_switch
;
2864 controls
[i
].get
= snd_soc_dapm_get_pin_switch
;
2865 controls
[i
].put
= snd_soc_dapm_put_pin_switch
;
2866 controls
[i
].private_value
= (unsigned long)strings
[i
];
2869 card
->controls
= controls
;
2870 card
->num_controls
= nb_controls
;
2874 EXPORT_SYMBOL_GPL(snd_soc_of_parse_pin_switches
);
2876 int snd_soc_of_get_slot_mask(struct device_node
*np
,
2877 const char *prop_name
,
2881 const __be32
*of_slot_mask
= of_get_property(np
, prop_name
, &val
);
2887 for (i
= 0; i
< val
; i
++)
2888 if (be32_to_cpup(&of_slot_mask
[i
]))
2893 EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask
);
2895 int snd_soc_of_parse_tdm_slot(struct device_node
*np
,
2896 unsigned int *tx_mask
,
2897 unsigned int *rx_mask
,
2898 unsigned int *slots
,
2899 unsigned int *slot_width
)
2905 snd_soc_of_get_slot_mask(np
, "dai-tdm-slot-tx-mask", tx_mask
);
2907 snd_soc_of_get_slot_mask(np
, "dai-tdm-slot-rx-mask", rx_mask
);
2909 if (of_property_read_bool(np
, "dai-tdm-slot-num")) {
2910 ret
= of_property_read_u32(np
, "dai-tdm-slot-num", &val
);
2918 if (of_property_read_bool(np
, "dai-tdm-slot-width")) {
2919 ret
= of_property_read_u32(np
, "dai-tdm-slot-width", &val
);
2929 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot
);
2931 void snd_soc_of_parse_node_prefix(struct device_node
*np
,
2932 struct snd_soc_codec_conf
*codec_conf
,
2933 struct device_node
*of_node
,
2934 const char *propname
)
2939 ret
= of_property_read_string(np
, propname
, &str
);
2941 /* no prefix is not error */
2945 codec_conf
->dlc
.of_node
= of_node
;
2946 codec_conf
->name_prefix
= str
;
2948 EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix
);
2950 int snd_soc_of_parse_audio_routing(struct snd_soc_card
*card
,
2951 const char *propname
)
2953 struct device_node
*np
= card
->dev
->of_node
;
2955 struct snd_soc_dapm_route
*routes
;
2958 num_routes
= of_property_count_strings(np
, propname
);
2959 if (num_routes
< 0 || num_routes
& 1) {
2961 "ASoC: Property '%s' does not exist or its length is not even\n",
2967 routes
= devm_kcalloc(card
->dev
, num_routes
, sizeof(*routes
),
2971 "ASoC: Could not allocate DAPM route table\n");
2975 for (i
= 0; i
< num_routes
; i
++) {
2976 int ret
= of_property_read_string_index(np
, propname
,
2977 2 * i
, &routes
[i
].sink
);
2980 "ASoC: Property '%s' index %d could not be read: %d\n",
2981 propname
, 2 * i
, ret
);
2984 ret
= of_property_read_string_index(np
, propname
,
2985 (2 * i
) + 1, &routes
[i
].source
);
2988 "ASoC: Property '%s' index %d could not be read: %d\n",
2989 propname
, (2 * i
) + 1, ret
);
2994 card
->num_of_dapm_routes
= num_routes
;
2995 card
->of_dapm_routes
= routes
;
2999 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing
);
3001 int snd_soc_of_parse_aux_devs(struct snd_soc_card
*card
, const char *propname
)
3003 struct device_node
*node
= card
->dev
->of_node
;
3004 struct snd_soc_aux_dev
*aux
;
3007 num
= of_count_phandle_with_args(node
, propname
, NULL
);
3008 if (num
== -ENOENT
) {
3010 } else if (num
< 0) {
3011 dev_err(card
->dev
, "ASOC: Property '%s' could not be read: %d\n",
3016 aux
= devm_kcalloc(card
->dev
, num
, sizeof(*aux
), GFP_KERNEL
);
3019 card
->aux_dev
= aux
;
3020 card
->num_aux_devs
= num
;
3022 for_each_card_pre_auxs(card
, i
, aux
) {
3023 aux
->dlc
.of_node
= of_parse_phandle(node
, propname
, i
);
3024 if (!aux
->dlc
.of_node
)
3030 EXPORT_SYMBOL_GPL(snd_soc_of_parse_aux_devs
);
3032 unsigned int snd_soc_daifmt_clock_provider_flipped(unsigned int dai_fmt
)
3034 unsigned int inv_dai_fmt
= dai_fmt
& ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK
;
3036 switch (dai_fmt
& SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK
) {
3037 case SND_SOC_DAIFMT_CBP_CFP
:
3038 inv_dai_fmt
|= SND_SOC_DAIFMT_CBC_CFC
;
3040 case SND_SOC_DAIFMT_CBP_CFC
:
3041 inv_dai_fmt
|= SND_SOC_DAIFMT_CBC_CFP
;
3043 case SND_SOC_DAIFMT_CBC_CFP
:
3044 inv_dai_fmt
|= SND_SOC_DAIFMT_CBP_CFC
;
3046 case SND_SOC_DAIFMT_CBC_CFC
:
3047 inv_dai_fmt
|= SND_SOC_DAIFMT_CBP_CFP
;
3053 EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_flipped
);
3055 unsigned int snd_soc_daifmt_clock_provider_from_bitmap(unsigned int bit_frame
)
3058 * bit_frame is return value from
3059 * snd_soc_daifmt_parse_clock_provider_raw()
3063 switch (bit_frame
) {
3065 return SND_SOC_DAIFMT_CBP_CFP
;
3067 return SND_SOC_DAIFMT_CBP_CFC
;
3069 return SND_SOC_DAIFMT_CBC_CFP
;
3071 return SND_SOC_DAIFMT_CBC_CFC
;
3076 EXPORT_SYMBOL_GPL(snd_soc_daifmt_clock_provider_from_bitmap
);
3078 unsigned int snd_soc_daifmt_parse_format(struct device_node
*np
,
3083 unsigned int format
= 0;
3089 } of_fmt_table
[] = {
3090 { "i2s", SND_SOC_DAIFMT_I2S
},
3091 { "right_j", SND_SOC_DAIFMT_RIGHT_J
},
3092 { "left_j", SND_SOC_DAIFMT_LEFT_J
},
3093 { "dsp_a", SND_SOC_DAIFMT_DSP_A
},
3094 { "dsp_b", SND_SOC_DAIFMT_DSP_B
},
3095 { "ac97", SND_SOC_DAIFMT_AC97
},
3096 { "pdm", SND_SOC_DAIFMT_PDM
},
3097 { "msb", SND_SOC_DAIFMT_MSB
},
3098 { "lsb", SND_SOC_DAIFMT_LSB
},
3105 * check "dai-format = xxx"
3106 * or "[prefix]format = xxx"
3107 * SND_SOC_DAIFMT_FORMAT_MASK area
3109 ret
= of_property_read_string(np
, "dai-format", &str
);
3111 snprintf(prop
, sizeof(prop
), "%sformat", prefix
);
3112 ret
= of_property_read_string(np
, prop
, &str
);
3117 for (i
= 0; i
< ARRAY_SIZE(of_fmt_table
); i
++) {
3118 if (strcmp(str
, of_fmt_table
[i
].name
) == 0) {
3119 format
|= of_fmt_table
[i
].val
;
3126 * check "[prefix]continuous-clock"
3127 * SND_SOC_DAIFMT_CLOCK_MASK area
3129 snprintf(prop
, sizeof(prop
), "%scontinuous-clock", prefix
);
3130 if (of_property_read_bool(np
, prop
))
3131 format
|= SND_SOC_DAIFMT_CONT
;
3133 format
|= SND_SOC_DAIFMT_GATED
;
3136 * check "[prefix]bitclock-inversion"
3137 * check "[prefix]frame-inversion"
3138 * SND_SOC_DAIFMT_INV_MASK area
3140 snprintf(prop
, sizeof(prop
), "%sbitclock-inversion", prefix
);
3141 bit
= !!of_get_property(np
, prop
, NULL
);
3143 snprintf(prop
, sizeof(prop
), "%sframe-inversion", prefix
);
3144 frame
= !!of_get_property(np
, prop
, NULL
);
3146 switch ((bit
<< 4) + frame
) {
3148 format
|= SND_SOC_DAIFMT_IB_IF
;
3151 format
|= SND_SOC_DAIFMT_IB_NF
;
3154 format
|= SND_SOC_DAIFMT_NB_IF
;
3157 /* SND_SOC_DAIFMT_NB_NF is default */
3163 EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_format
);
3165 unsigned int snd_soc_daifmt_parse_clock_provider_raw(struct device_node
*np
,
3167 struct device_node
**bitclkmaster
,
3168 struct device_node
**framemaster
)
3171 unsigned int bit
, frame
;
3177 * check "[prefix]bitclock-master"
3178 * check "[prefix]frame-master"
3180 snprintf(prop
, sizeof(prop
), "%sbitclock-master", prefix
);
3181 bit
= !!of_get_property(np
, prop
, NULL
);
3182 if (bit
&& bitclkmaster
)
3183 *bitclkmaster
= of_parse_phandle(np
, prop
, 0);
3185 snprintf(prop
, sizeof(prop
), "%sframe-master", prefix
);
3186 frame
= !!of_get_property(np
, prop
, NULL
);
3187 if (frame
&& framemaster
)
3188 *framemaster
= of_parse_phandle(np
, prop
, 0);
3192 * It will be parameter of
3193 * snd_soc_daifmt_clock_provider_from_bitmap()
3195 return (bit
<< 4) + frame
;
3197 EXPORT_SYMBOL_GPL(snd_soc_daifmt_parse_clock_provider_raw
);
3199 int snd_soc_get_dai_id(struct device_node
*ep
)
3201 struct snd_soc_component
*component
;
3202 struct snd_soc_dai_link_component dlc
;
3205 dlc
.of_node
= of_graph_get_port_parent(ep
);
3208 * For example HDMI case, HDMI has video/sound port,
3209 * but ALSA SoC needs sound port number only.
3210 * Thus counting HDMI DT port/endpoint doesn't work.
3211 * Then, it should have .of_xlate_dai_id
3214 mutex_lock(&client_mutex
);
3215 component
= soc_find_component(&dlc
);
3217 ret
= snd_soc_component_of_xlate_dai_id(component
, ep
);
3218 mutex_unlock(&client_mutex
);
3220 of_node_put(dlc
.of_node
);
3224 EXPORT_SYMBOL_GPL(snd_soc_get_dai_id
);
3226 int snd_soc_get_dai_name(const struct of_phandle_args
*args
,
3227 const char **dai_name
)
3229 struct snd_soc_component
*pos
;
3230 int ret
= -EPROBE_DEFER
;
3232 mutex_lock(&client_mutex
);
3233 for_each_component(pos
) {
3234 struct device_node
*component_of_node
= soc_component_to_node(pos
);
3236 if (component_of_node
!= args
->np
|| !pos
->num_dai
)
3239 ret
= snd_soc_component_of_xlate_dai_name(pos
, args
, dai_name
);
3240 if (ret
== -ENOTSUPP
) {
3241 struct snd_soc_dai
*dai
;
3244 switch (args
->args_count
) {
3246 id
= 0; /* same as dai_drv[0] */
3256 if (id
< 0 || id
>= pos
->num_dai
) {
3263 /* find target DAI */
3264 for_each_component_dais(pos
, dai
) {
3270 *dai_name
= dai
->driver
->name
;
3272 *dai_name
= pos
->name
;
3275 * if another error than ENOTSUPP is returned go on and
3276 * check if another component is provided with the same
3277 * node. This may happen if a device provides several
3285 mutex_unlock(&client_mutex
);
3288 EXPORT_SYMBOL_GPL(snd_soc_get_dai_name
);
3290 int snd_soc_of_get_dai_name(struct device_node
*of_node
,
3291 const char **dai_name
)
3293 struct of_phandle_args args
;
3296 ret
= of_parse_phandle_with_args(of_node
, "sound-dai",
3297 "#sound-dai-cells", 0, &args
);
3301 ret
= snd_soc_get_dai_name(&args
, dai_name
);
3303 of_node_put(args
.np
);
3307 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name
);
3309 static void __snd_soc_of_put_component(struct snd_soc_dai_link_component
*component
)
3311 if (component
->of_node
) {
3312 of_node_put(component
->of_node
);
3313 component
->of_node
= NULL
;
3317 static int __snd_soc_of_get_dai_link_component_alloc(
3318 struct device
*dev
, struct device_node
*of_node
,
3319 struct snd_soc_dai_link_component
**ret_component
,
3322 struct snd_soc_dai_link_component
*component
;
3325 /* Count the number of CPUs/CODECs */
3326 num
= of_count_phandle_with_args(of_node
, "sound-dai", "#sound-dai-cells");
3329 dev_err(dev
, "No 'sound-dai' property\n");
3331 dev_err(dev
, "Bad phandle in 'sound-dai'\n");
3334 component
= devm_kcalloc(dev
, num
, sizeof(*component
), GFP_KERNEL
);
3338 *ret_component
= component
;
3344 static int __snd_soc_of_get_dai_link_component_parse(
3345 struct device_node
*of_node
,
3346 struct snd_soc_dai_link_component
*component
, int index
)
3348 struct of_phandle_args args
;
3351 ret
= of_parse_phandle_with_args(of_node
, "sound-dai", "#sound-dai-cells",
3356 ret
= snd_soc_get_dai_name(&args
, &component
->dai_name
);
3360 component
->of_node
= args
.np
;
3365 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3366 * @dai_link: DAI link
3368 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3370 void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link
*dai_link
)
3372 struct snd_soc_dai_link_component
*component
;
3375 for_each_link_codecs(dai_link
, index
, component
)
3376 __snd_soc_of_put_component(component
);
3378 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs
);
3381 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3383 * @of_node: Device node
3384 * @dai_link: DAI link
3386 * Builds an array of CODEC DAI components from the DAI link property
3388 * The array is set in the DAI link and the number of DAIs is set accordingly.
3389 * The device nodes in the array (of_node) must be dereferenced by calling
3390 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3392 * Returns 0 for success
3394 int snd_soc_of_get_dai_link_codecs(struct device
*dev
,
3395 struct device_node
*of_node
,
3396 struct snd_soc_dai_link
*dai_link
)
3398 struct snd_soc_dai_link_component
*component
;
3401 ret
= __snd_soc_of_get_dai_link_component_alloc(dev
, of_node
,
3402 &dai_link
->codecs
, &dai_link
->num_codecs
);
3406 /* Parse the list */
3407 for_each_link_codecs(dai_link
, index
, component
) {
3408 ret
= __snd_soc_of_get_dai_link_component_parse(of_node
, component
, index
);
3414 snd_soc_of_put_dai_link_codecs(dai_link
);
3415 dai_link
->codecs
= NULL
;
3416 dai_link
->num_codecs
= 0;
3419 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs
);
3422 * snd_soc_of_put_dai_link_cpus - Dereference device nodes in the codecs array
3423 * @dai_link: DAI link
3425 * Dereference device nodes acquired by snd_soc_of_get_dai_link_cpus().
3427 void snd_soc_of_put_dai_link_cpus(struct snd_soc_dai_link
*dai_link
)
3429 struct snd_soc_dai_link_component
*component
;
3432 for_each_link_cpus(dai_link
, index
, component
)
3433 __snd_soc_of_put_component(component
);
3435 EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_cpus
);
3438 * snd_soc_of_get_dai_link_cpus - Parse a list of CPU DAIs in the devicetree
3440 * @of_node: Device node
3441 * @dai_link: DAI link
3443 * Is analogous to snd_soc_of_get_dai_link_codecs but parses a list of CPU DAIs
3446 * Returns 0 for success
3448 int snd_soc_of_get_dai_link_cpus(struct device
*dev
,
3449 struct device_node
*of_node
,
3450 struct snd_soc_dai_link
*dai_link
)
3452 struct snd_soc_dai_link_component
*component
;
3455 /* Count the number of CPUs */
3456 ret
= __snd_soc_of_get_dai_link_component_alloc(dev
, of_node
,
3457 &dai_link
->cpus
, &dai_link
->num_cpus
);
3461 /* Parse the list */
3462 for_each_link_cpus(dai_link
, index
, component
) {
3463 ret
= __snd_soc_of_get_dai_link_component_parse(of_node
, component
, index
);
3469 snd_soc_of_put_dai_link_cpus(dai_link
);
3470 dai_link
->cpus
= NULL
;
3471 dai_link
->num_cpus
= 0;
3474 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_cpus
);
3476 static int __init
snd_soc_init(void)
3480 snd_soc_debugfs_init();
3481 ret
= snd_soc_util_init();
3485 ret
= platform_driver_register(&soc_driver
);
3491 snd_soc_util_exit();
3493 snd_soc_debugfs_exit();
3496 module_init(snd_soc_init
);
3498 static void __exit
snd_soc_exit(void)
3500 snd_soc_util_exit();
3501 snd_soc_debugfs_exit();
3503 platform_driver_unregister(&soc_driver
);
3505 module_exit(snd_soc_exit
);
3507 /* Module information */
3508 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3509 MODULE_DESCRIPTION("ALSA SoC Core");
3510 MODULE_LICENSE("GPL");
3511 MODULE_ALIAS("platform:soc-audio");