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Commit 0f4ccbb0 authored by Wang Xingchao's avatar Wang Xingchao Committed by Takashi Iwai
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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: default avatarWang Xingchao <xingchao.wang@intel.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 0c7f46ad

sound/pci/hda/hda_codec.c

+5 −2
Original line number Diff line number Diff line
@@ -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);