From: Thierry Reding <[email protected]>

This is useful for checking at runtime whether a given modifier is from
a specific vendor so that any vendor-specific parsing can be done.

Signed-off-by: Thierry Reding <[email protected]>
---
 include/uapi/drm/drm_fourcc.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index f76de49c768f..567fd4566e08 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -366,6 +366,9 @@ extern "C" {
 
 #define DRM_FORMAT_RESERVED          ((1ULL << 56) - 1)
 
+#define fourcc_mod_is_vendor(modifier, vendor) \
+       ((((modifier) >> 56) & 0xff) == DRM_FORMAT_MOD_VENDOR_## vendor)
+
 #define fourcc_mod_code(vendor, val) \
        ((((__u64)DRM_FORMAT_MOD_VENDOR_## vendor) << 56) | ((val) & 
0x00ffffffffffffffULL))
 
-- 
2.30.2

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