ALSA: hda - check supported power states
Add function to check whether power states supported by specific codec node. Signed-off-by: Wang Xingchao <xingchao.wang@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -3504,6 +3504,22 @@ void snd_hda_codec_set_power_to_all(struct hda_codec *codec, hda_nid_t fg,
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EXPORT_SYMBOL_HDA(snd_hda_codec_set_power_to_all);
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EXPORT_SYMBOL_HDA(snd_hda_codec_set_power_to_all);
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/*
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* supported power states check
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*/
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static bool snd_hda_codec_get_supported_ps(struct hda_codec *codec, hda_nid_t fg,
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unsigned int power_state)
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{
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int sup = snd_hda_param_read(codec, fg, AC_PAR_POWER_STATE);
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if (sup < 0)
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return false;
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if (sup & power_state)
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return true;
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else
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return false;
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}
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/*
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/*
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* set power state of the codec
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* set power state of the codec
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*/
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*/
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