__DRM_ARGB64_PREP_BPC
__DRM_ARGB64_PREP_BPC(alpha, 48, __bpc) | \
__DRM_ARGB64_PREP_BPC(red, 32, __bpc) | \
__DRM_ARGB64_PREP_BPC(green, 16, __bpc) | \
__DRM_ARGB64_PREP_BPC(blue, 0, __bpc); \