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    Subject[PATCH AUTOSEL 5.4 006/130] drm/amd/display: Do not silently accept DCC for multiplane formats.
    Date
    From: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

    [ Upstream commit b35ce7b364ec80b54f48a8fdf9fb74667774d2da ]

    Silently accepting it could result in corruption.

    Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
    Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
    Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
    index d2dd387c95d86..ce70c42a2c3ec 100644
    --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
    +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
    @@ -2734,7 +2734,7 @@ fill_plane_dcc_attributes(struct amdgpu_device *adev,
    return 0;

    if (format >= SURFACE_PIXEL_FORMAT_VIDEO_BEGIN)
    - return 0;
    + return -EINVAL;

    if (!dc->cap_funcs.get_dcc_compression_cap)
    return -EINVAL;
    --
    2.27.0
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