libdrm: Add define for DRM_RDWR

mmap requires O_RDWR to be set if MAP_SHARED is requested
with PROT_WRITE. Adding DRM_RDWR (defined as O_RDWR) as a
valid flag that can be passed to DRM_IOCTL_PRIME_HANDLE_TO_FD
for buffers that need required mapping.

Signed-off-by: Hemant Hariyani <hemanthariyani@ti.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/drm/drm.h b/include/drm/drm.h
index a950b580..6cca2b8b 100644
--- a/include/drm/drm.h
+++ b/include/drm/drm.h
@@ -649,6 +649,7 @@ struct drm_set_client_cap {
 };
 
 #define DRM_CLOEXEC O_CLOEXEC
+#define DRM_RDWR O_RDWR
 struct drm_prime_handle {
         __u32 handle;