diff options
| author | Wang Xingchao <xingchao.wang@intel.com> | 2012-06-07 16:51:33 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2012-06-07 11:40:33 +0200 |
| commit | 0f4ccbb02533276ab750961e150aeee06492ed7c (patch) | |
| tree | 8f8486d38b3ad9ddd34e91e2177d8db4f0319b83 | |
| parent | 0c7f46ad927cbd29965d4971730de713b478d270 (diff) | |
ALSA: hda - reduce msleep time if EPSS power states supported
if EPSS supported, transition from D3 state to D0 state in less
than 10ms
Signed-off-by: Wang Xingchao <xingchao.wang@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index b89c8ecc819..fedbfae978a 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -3532,8 +3532,11 @@ static void hda_set_power_state(struct hda_codec *codec, hda_nid_t fg, } /* this delay seems necessary to avoid click noise at power-down */ - if (power_state == AC_PWRST_D3) - msleep(100); + if (power_state == AC_PWRST_D3) { + /* transition time less than 10ms for power down */ + bool epss = snd_hda_codec_get_supported_ps(codec, fg, AC_PWRST_EPSS); + msleep(epss ? 10 : 100); + } snd_hda_codec_read(codec, fg, 0, AC_VERB_SET_POWER_STATE, power_state); snd_hda_codec_set_power_to_all(codec, fg, power_state, true); |