By default set udl_gem_object as cacheable, but set WC flag when attaching
dmabuf. In udl_gem_mmap() update cache attributes based on the flags, similar
to exynos_drm_gem_mmap().
Signed-off-by: NHaixia Shi <hshi@chromium.org>
Reviewed-by: NSonny Rao <sonnyrao@chromium.org>
Reviewed-by: NOlof Johansson <olofj@chromium.org>
Reviewed-by: NStéphane Marchesin <marcheu@chromium.org>
Signed-off-by: NDave Airlie <airlied@redhat.com>