drm_prime_handle  731 include/uapi/drm/drm.h #define DRM_IOCTL_PRIME_HANDLE_TO_FD    DRM_IOWR(0x2d, struct drm_prime_handle)
drm_prime_handle  732 include/uapi/drm/drm.h #define DRM_IOCTL_PRIME_FD_TO_HANDLE    DRM_IOWR(0x2e, struct drm_prime_handle)