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ALSA: hda - Reduce click noise at power-saving
authorTakashi Iwai <tiwai@suse.de>
Wed, 22 Jul 2009 10:39:24 +0000 (12:39 +0200)
committerTakashi Iwai <tiwai@suse.de>
Wed, 22 Jul 2009 10:39:24 +0000 (12:39 +0200)
commit05ff7e11b78f18ff6819d2c260b7bcc7da0c8f46
treed19b9ea9530321a0513863ccd32cf5f3f3f3e343tree | snapshot
parent05e870d29aef0bf43124b2bd424103987fadd5b5commit | diff
ALSA: hda - Reduce click noise at power-saving

Add some tricks to reduce the click noise at powering down to D3
in the power saving mode on STAC/IDT codecs.
The key seems to be to reset PINs before the power-down, and some
delay before entering D3.  The needed delay is significantly long,
but I don't know why.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/pci/hda/hda_codec.c diff | blob | history
sound/pci/hda/patch_sigmatel.c diff | blob | history
Domain: System / Kernel;