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    Subject[65/90] ALSA: virtuoso: Xonar DS: fix polarity of front output
    3.0-stable review patch.  If anyone has any objections, please let me know.


    From: Clemens Ladisch <>

    commit f0e48b6bd4e407459715240cd241ddb6b89bdf81 upstream.

    The two DACs for the front output and the surround/center/LFE/back
    outputs are wired up out of phase, so when channels are duplicated,
    their sound can cancel out each other and result in a weaker bass
    response. To fix this, reverse the polarity of the neutron flow to
    the front output.

    Reported-any-tested-by: Daniel Hill <>
    Signed-off-by: Clemens Ladisch <>
    Signed-off-by: Takashi Iwai <>
    Signed-off-by: Greg Kroah-Hartman <>

    sound/pci/oxygen/xonar_wm87x6.c | 1 +
    1 file changed, 1 insertion(+)

    --- a/sound/pci/oxygen/xonar_wm87x6.c
    +++ b/sound/pci/oxygen/xonar_wm87x6.c
    @@ -177,6 +177,7 @@ static void wm8776_registers_init(struct
    struct xonar_wm87x6 *data = chip->model_data;

    wm8776_write(chip, WM8776_RESET, 0);
    + wm8776_write(chip, WM8776_PHASESWAP, WM8776_PH_MASK);
    wm8776_write(chip, WM8776_DACCTRL1, WM8776_DZCEN |
    wm8776_write(chip, WM8776_DACMUTE, chip->dac_mute ? WM8776_DMUTE : 0);

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