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    Subject[PATCH 5.10 143/154] drm/amdgpu: fix set scaling mode Full/Full aspect/Center not works on vga and dvi connectors
    Date
    From: hongao <hongao@uniontech.com>

    commit bf552083916a7f8800477b5986940d1c9a31b953 upstream.

    amdgpu_connector_vga_get_modes missed function amdgpu_get_native_mode
    which assign amdgpu_encoder->native_mode with *preferred_mode result in
    amdgpu_encoder->native_mode.clock always be 0. That will cause
    amdgpu_connector_set_property returned early on:
    if ((rmx_type != DRM_MODE_SCALE_NONE) &&
    (amdgpu_encoder->native_mode.clock == 0))
    when we try to set scaling mode Full/Full aspect/Center.
    Add the missing function to amdgpu_connector_vga_get_mode can fix this.
    It also works on dvi connectors because
    amdgpu_connector_dvi_helper_funcs.get_mode use the same method.

    Signed-off-by: hongao <hongao@uniontech.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Cc: stable@vger.kernel.org
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c | 1 +
    1 file changed, 1 insertion(+)

    --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
    +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
    @@ -827,6 +827,7 @@ static int amdgpu_connector_vga_get_mode

    amdgpu_connector_get_edid(connector);
    ret = amdgpu_connector_ddc_get_modes(connector);
    + amdgpu_get_native_mode(connector);

    return ret;
    }

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