tree d4f756b072131bef0c4b04b67e00aaa872fa371b
parent 664bc5c55923712a8aabd2a390ed7477325e32df
author Takashi Iwai <tiwai@suse.de> 1428142648 +0200
committer Takashi Iwai <tiwai@suse.de> 1428142972 +0200

ALSA: hda - Sync node attributes at resume from widget power saving

So far we assumed that the node attributes like amp values remain
during the power state transition of the node itself.  While this is
true for IDT/STAC codecs I've tested, but some other codecs don't seem
behaving in that way.

This patch implements a partial sync mechanism specific to the given
widget node.  Now we've merged the regmap support, and it can be
easily written with regcache_sync_region().

Tested-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>