ALSA: hda - Reduce click noise at power-saving

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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>

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This commit is contained in:

Takashi Iwai 2009-07-22 12:39:24 +02:00

parent 05e870d29a

commit 05ff7e11b7

2 changed files with 21 additions and 2 deletions

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9

sound/pci/hda/hda_codec.c

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14

sound/pci/hda/patch_sigmatel.c

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