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    Subject[PATCH v2 4/4] drm/sun4i: Update mixer's internal registers after initialization
    Date
    From: Roman Stratiienko <roman.stratiienko@globallogic.com>

    At system start blink of u-boot ghost framebuffer can be observed.
    Fix it.

    Fixes: 9d75b8c0b999 ("drm/sun4i: add support for Allwinner DE2 mixers")
    Signed-off-by: Roman Stratiienko <roman.stratiienko@globallogic.com>
    Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
    ---
    v2:
    - Picked 'Reviewed-by' line
    - Added 'Fixes' line
    ---
    drivers/gpu/drm/sun4i/sun8i_mixer.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
    index 5d90a95ff855..86711d8a9c84 100644
    --- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
    +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
    @@ -576,6 +576,9 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
    regmap_update_bits(mixer->engine.regs, SUN8I_MIXER_BLEND_PIPE_CTL(base),
    SUN8I_MIXER_BLEND_PIPE_CTL_EN_MSK, 0);

    + regmap_write(mixer->engine.regs, SUN8I_MIXER_GLOBAL_DBUFF,
    + SUN8I_MIXER_GLOBAL_DBUFF_ENABLE);
    +
    return 0;

    err_disable_bus_clk:
    --
    2.17.1
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