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    Subject[PATCH 5.8 034/186] drm/amd/display: Keep current gain when ABM disable immediately
    Date
    From: Brandon Syu <Brandon.Syu@amd.com>

    [ Upstream commit cba4b52e431e5de3d8012281cfe194f1c39a9052 ]

    [Why]
    When system enters s3/s0i3, backlight PWM would set user level.

    [How]
    ABM disable function add keep current gain to avoid it.

    Signed-off-by: Brandon Syu <Brandon.Syu@amd.com>
    Reviewed-by: Josip Pavic <Josip.Pavic@amd.com>
    Acked-by: Eryk Brol <eryk.brol@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/gpu/drm/amd/display/dc/dc_stream.h | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/gpu/drm/amd/display/dc/dc_stream.h b/drivers/gpu/drm/amd/display/dc/dc_stream.h
    index 49aad691e687e..ccac2315a903a 100644
    --- a/drivers/gpu/drm/amd/display/dc/dc_stream.h
    +++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h
    @@ -222,7 +222,7 @@ struct dc_stream_state {
    union stream_update_flags update_flags;
    };

    -#define ABM_LEVEL_IMMEDIATE_DISABLE 0xFFFFFFFF
    +#define ABM_LEVEL_IMMEDIATE_DISABLE 255

    struct dc_stream_update {
    struct dc_stream_state *stream;
    --
    2.25.1


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