Add function to check whether power states supported by specific codec node.
Signed-off-by: Wang Xingchao xingchao.wang@intel.com --- sound/pci/hda/hda_codec.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 41ca803..b89c8ec 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -3505,6 +3505,22 @@ void snd_hda_codec_set_power_to_all(struct hda_codec *codec, hda_nid_t fg, EXPORT_SYMBOL_HDA(snd_hda_codec_set_power_to_all);
/* + * supported power states check + */ +static bool snd_hda_codec_get_supported_ps(struct hda_codec *codec, hda_nid_t fg, + unsigned int power_state) +{ + int sup = snd_hda_param_read(codec, fg, AC_PAR_POWER_STATE); + + if (sup < 0) + return false; + if (sup & power_state) + return true; + else + return false; +} + +/* * set power state of the codec */ static void hda_set_power_state(struct hda_codec *codec, hda_nid_t fg,