[ALSA] soc - DAPM - add hook to read state of DAPM widget
This adds a hook to read the power state of a DAPM widget, I use this in the gta02 driver to expose certain DAPM widgets in the mixer for ease of audio routing. Signed-off-by: Graeme Gregory <graeme@openmoko.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
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@ -223,6 +223,8 @@ int snd_soc_dapm_sys_add(struct device *dev);
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/* dapm audio endpoint control */
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int snd_soc_dapm_set_endpoint(struct snd_soc_codec *codec,
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char *pin, int status);
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int snd_soc_dapm_get_endpoint_status(struct snd_soc_codec *codec,
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char *pin);
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int snd_soc_dapm_sync_endpoints(struct snd_soc_codec *codec);
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/* dapm widget types */
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@ -1342,6 +1342,29 @@ int snd_soc_dapm_set_endpoint(struct snd_soc_codec *codec,
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}
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EXPORT_SYMBOL_GPL(snd_soc_dapm_set_endpoint);
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/**
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* snd_soc_dapm_get_endpoint_status - get audio endpoint status
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* @codec: audio codec
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* @endpoint: audio signal endpoint (or start point)
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*
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* Get audio endpoint status - connected or disconnected.
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*
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* Returns status
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*/
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int snd_soc_dapm_get_endpoint_status(struct snd_soc_codec *codec,
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char *endpoint)
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{
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struct snd_soc_dapm_widget *w;
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list_for_each_entry(w, &codec->dapm_widgets, list) {
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if (!strcmp(w->name, endpoint))
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return w->connected;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(snd_soc_dapm_get_endpoint);
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/**
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* snd_soc_dapm_free - free dapm resources
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* @socdev: SoC device
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