diff options
Diffstat (limited to 'sound/pci/hda/hda_local.h')
| -rw-r--r-- | sound/pci/hda/hda_local.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h index 2ff62dc..05f1d59 100644 --- a/sound/pci/hda/hda_local.h +++ b/sound/pci/hda/hda_local.h @@ -657,6 +657,19 @@ int snd_hda_check_amp_list_power(struct hda_codec *codec, struct hda_loopback_check *check, hda_nid_t nid); +/* check whether the actual power state matches with the target state */ +static inline bool +snd_hda_check_power_state(struct hda_codec *codec, hda_nid_t nid, + unsigned int target_state) +{ + unsigned int state = snd_hda_codec_read(codec, nid, 0, + AC_VERB_GET_POWER_STATE, 0); + if (state & AC_PWRST_ERROR) + return true; + state = (state >> 4) & 0x0f; + return (state != target_state); +} + /* * AMP control callbacks */ |
