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>
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index b89c8ec..fedbfae 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -3532,8 +3532,11 @@
}
/* 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);