• Takashi Iwai's avatar
    ALSA: hda - Treat stereo-to-mono mix properly · 79eb59a6
    Takashi Iwai authored
    [ Upstream commit cc261738 ]
    
    The commit [ef403edb: ALSA: hda - Don't access stereo amps for
    mono channel widgets] fixed the handling of mono widgets in general,
    but it still misses an exceptional case: namely, a mono mixer widget
    taking a single stereo input.  In this case, it has stereo volumes
    although it's a mono widget, and thus we have to take care of both
    left and right input channels, as stated in HD-audio spec ("7.1.3
    Widget Interconnection Rules").
    
    This patch covers this missing piece by adding proper checks of stereo
    amps in both the generic parser and the proc output codes.
    Reported-by: default avatarRaymond Yau <superquad.vortex2@gmail.com>
    Cc: <stable@vger.kernel.org>
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
    79eb59a6
hda_generic.c 145 KB