On Monday, May 17th, 2021 at 8:16 PM, Nieto, David M <David.Nieto at amd.com> wrote: > Btw is DRM_MAJOR 226 consider uapi? I don't see it in uapi headers. It's not in the headers, but it's de facto uAPI, as seen in libdrm: > git grep 226 xf86drm.c 99:#define DRM_MAJOR 226 /* Linux */