HC_HTXnFM_ARGB32 1002 drivers/gpu/drm/via/via_3d_reg.h #define HC_HTXnFM_ARGB0888      (HC_HTXnFM_ARGB32    | 0x00000000)
HC_HTXnFM_ARGB32 1003 drivers/gpu/drm/via/via_3d_reg.h #define HC_HTXnFM_ARGB8888      (HC_HTXnFM_ARGB32    | 0x00010000)