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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
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@ -454,6 +454,10 @@ int snd_soc_component_force_enable_pin_unlocked(
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struct snd_soc_component *component,
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const char *pin);
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/* component controls */
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int snd_soc_component_notify_control(struct snd_soc_component *component,
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const char * const ctl);
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/* component driver ops */
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int snd_soc_component_open(struct snd_soc_component *component,
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struct snd_pcm_substream *substream);
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@ -236,6 +236,28 @@ int snd_soc_component_force_enable_pin_unlocked(
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}
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EXPORT_SYMBOL_GPL(snd_soc_component_force_enable_pin_unlocked);
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int snd_soc_component_notify_control(struct snd_soc_component *component,
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const char * const ctl)
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{
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char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
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struct snd_kcontrol *kctl;
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if (component->name_prefix)
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snprintf(name, ARRAY_SIZE(name), "%s %s", component->name_prefix, ctl);
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else
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snprintf(name, ARRAY_SIZE(name), "%s", ctl);
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kctl = snd_soc_card_get_kcontrol(component->card, name);
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if (!kctl)
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return soc_component_ret(component, -EINVAL);
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snd_ctl_notify(component->card->snd_card,
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SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
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return 0;
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}
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EXPORT_SYMBOL_GPL(snd_soc_component_notify_control);
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/**
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* snd_soc_component_set_jack - configure component jack.
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* @component: COMPONENTs
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