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| author | Wang Xingchao <xingchao.wang@intel.com> | 2012-06-06 22:02:48 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2012-06-07 11:39:52 +0200 |
| commit | 0c7f46ad927cbd29965d4971730de713b478d270 (patch) | |
| tree | d2ea14a982e3330641d9f59e3837fffd3045d25e /sound/pci | |
| parent | 167d2d55bfb4628169a57e3adbb1e5b097dca0f5 (diff) | |
| download | linux-3.10-0c7f46ad927cbd29965d4971730de713b478d270.tar.gz linux-3.10-0c7f46ad927cbd29965d4971730de713b478d270.tar.bz2 linux-3.10-0c7f46ad927cbd29965d4971730de713b478d270.zip | |
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>
Diffstat (limited to 'sound/pci')
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 41ca803a1ff..b89c8ecc819 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, |