diff options
| author | Charles Keepax <ckeepax@opensource.cirrus.com> | 2023-05-12 15:28:30 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-05-15 14:11:17 +0300 |
| commit | ace9ed54bd874f2c63723b13b1747f6463e2587e (patch) | |
| tree | 81ed70a944b8737f980ba418f6b4e89e6978ccc1 | |
| parent | 1946dda47c8807517ccaa8caf8ee7de3498db531 (diff) | |
| download | linux-ace9ed54bd874f2c63723b13b1747f6463e2587e.tar.xz | |
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
| -rw-r--r-- | include/sound/soc-component.h | 4 | ||||
| -rw-r--r-- | sound/soc/soc-component.c | 22 |
2 files changed, 26 insertions, 0 deletions
diff --git a/include/sound/soc-component.h b/include/sound/soc-component.h index 0814ed143864..0b47603c9db2 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 ff25718ff2e8..4356cc320fea 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 |