• Takashi Iwai's avatar
    ALSA: hda - Add a fake mute feature · 3868137e
    Takashi Iwai authored
    Some codecs don't supply the mute amp-capabilities although the lowest
    volume gives the mute.  It'd be handy if the parser provides the mute
    mixers in such a case.
    This patch adds an extension amp-cap bit (which is used only in the
    driver) to represent the min volume = mute state.  Also modified the
    amp cache code to support the fake mute feature when this bit is set
    but the real mute bit is unset.
    In addition, conexant cx5051 parser uses this new feature to implement
    the missing mute controls.
    Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=42825
    Cc: <stable@kernel.org>
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>