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    Subject[PATCH 5.19 12/38] drm/meson: Correct OSD1 global alpha value
    Date
    From: Stuart Menefy <stuart.menefy@mathembedded.com>

    [ Upstream commit 6836829c8ea453c9e3e518e61539e35881c8ed5f ]

    VIU_OSD1_CTRL_STAT.GLOBAL_ALPHA is a 9 bit field, so the maximum
    value is 0x100 not 0xff.

    This matches the vendor kernel.

    Signed-off-by: Stuart Menefy <stuart.menefy@mathembedded.com>
    Fixes: bbbe775ec5b5 ("drm: Add support for Amlogic Meson Graphic Controller")
    Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
    Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
    Link: https://patchwork.freedesktop.org/patch/msgid/20220908155103.686904-1-stuart.menefy@mathembedded.com
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/gpu/drm/meson/meson_plane.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/gpu/drm/meson/meson_plane.c b/drivers/gpu/drm/meson/meson_plane.c
    index 8640a8a8a469..44aa52629443 100644
    --- a/drivers/gpu/drm/meson/meson_plane.c
    +++ b/drivers/gpu/drm/meson/meson_plane.c
    @@ -168,7 +168,7 @@ static void meson_plane_atomic_update(struct drm_plane *plane,

    /* Enable OSD and BLK0, set max global alpha */
    priv->viu.osd1_ctrl_stat = OSD_ENABLE |
    - (0xFF << OSD_GLOBAL_ALPHA_SHIFT) |
    + (0x100 << OSD_GLOBAL_ALPHA_SHIFT) |
    OSD_BLK0_ENABLE;

    priv->viu.osd1_ctrl_stat2 = readl(priv->io_base +
    --
    2.35.1


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