Comment 1 for bug 1519168

Hui Wang ( wrote :

commit 8c69729b4439bbda88c3073df7243f755cc418ed
Author: Hui Wang <email address hidden>
Date: Tue Nov 24 11:08:18 2015 +0800

    ALSA: hda - Fix headphone noise after Dell XPS 13 resume back from S3

    We have a machine Dell XPS 13 with the codec alc256, after resume back
    from S3, the headphone has noise when play sound.

    Through comparing with the coeff vaule before and after S3, we found
    restoring a coeff register will help remove noise.

    Cc: Kailang Yang <email address hidden>
    Cc: <email address hidden>
    Signed-off-by: Hui Wang <email address hidden>
    Signed-off-by: Takashi Iwai <email address hidden>