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@xxxxxxxxxxxxxxxxxxxxx>
---
include/sound/soc-component.h | 4 ++++
sound/soc/soc-component.c | 22 ++++++++++++++++++++++
2 files changed, 26 insertions(+)
diff --git a/include/sound/soc-component.h b/include/sound/soc-component.h
index 0814ed1438640..0b47603c9db29 100644
--- a/include/sound/soc-component.h
+++ b/include/sound/soc-component.h
@@ -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);
diff --git a/sound/soc/soc-component.c b/sound/soc/soc-component.c
index ff25718ff2e88..4356cc320fea0 100644
--- a/sound/soc/soc-component.c
+++ b/sound/soc/soc-component.c
@@ -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
--
2.30.2
