Commit 32a4eb04 authored Jun 10, 2021 by Thierry Reding

drm/fourcc: Add macros to determine the modifier vendor

When working with framebuffer modifiers, it can be useful to extract the
vendor identifier or check a modifier against a given vendor identifier.
Add one macro that extracts the vendor identifier and a helper to check
a modifier against a given vendor identifier.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210610111236.3814211-1-thierry.reding@gmail.com

parent 7b812171

include/uapi/drm/drm_fourcc.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -373,6 +373,12 @@ extern "C" {

		#define DRM_FORMAT_RESERVED ((1ULL << 56) - 1)

		#define fourcc_mod_get_vendor(modifier) \
		(((modifier) >> 56) & 0xff)

		#define fourcc_mod_is_vendor(modifier, vendor) \
		(fourcc_mod_get_vendor(modifier) == DRM_FORMAT_MOD_VENDOR_## vendor)

		#define fourcc_mod_code(vendor, val) \
		((((__u64)DRM_FORMAT_MOD_VENDOR_## vendor) << 56) \| ((val) & 0x00ffffffffffffffULL))