#define DRM_MODE_PROP_IMMUTABLE (1<<2)
#define DRM_MODE_PROP_ENUM (1<<3) /* enumerated type with text strings */
#define DRM_MODE_PROP_BLOB (1<<4)
+#define DRM_MODE_PROP_BITMASK (1<<5) /* bitmask of enumerated types */
struct drm_mode_property_enum {
__u64 value;