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ASoC: soc-component: Add notify control helper function 

Add a function to allow ASoC drivers to easily notify an ALSA control
change. This function will automatically add any component naming
prefix into the control name.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com
Link: https://lore.kernel.org/r/20230512122838.243002-3-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org
This commit is contained in:
Charles Keepax 2023-05-12 13:28:30 +01:00 committed by Mark Brown
parent 1946dda47c
commit ace9ed54bd
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GPG Key ID: 24D68B725D5487D0
2 changed files with 26 additions and 0 deletions
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4
include/sound/soc-component.h
View File

@ -454,6 +454,10 @@ int snd_soc_component_force_enable_pin_unlocked(
struct snd_soc_component *component,
const char *pin);
/* component controls */
int snd_soc_component_notify_control(struct snd_soc_component *component,
const char * const ctl);
/* component driver ops */
int snd_soc_component_open(struct snd_soc_component *component,
struct snd_pcm_substream *substream);

22
sound/soc/soc-component.c
View File

@ -236,6 +236,28 @@ int snd_soc_component_force_enable_pin_unlocked(
}
EXPORT_SYMBOL_GPL(snd_soc_component_force_enable_pin_unlocked);
int snd_soc_component_notify_control(struct snd_soc_component *component,
const char * const ctl)
{
char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
struct snd_kcontrol *kctl;
if (component->name_prefix)
snprintf(name, ARRAY_SIZE(name), "%s %s", component->name_prefix, ctl);
else
snprintf(name, ARRAY_SIZE(name), "%s", ctl);
kctl = snd_soc_card_get_kcontrol(component->card, name);
if (!kctl)
return soc_component_ret(component, -EINVAL);
snd_ctl_notify(component->card->snd_card,
SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_component_notify_control);
/**
* snd_soc_component_set_jack - configure component jack.
* @component: COMPONENTs