Herrmann: Splitting DRM and KMS device nodes
David Herrmann describes
some recent graphics driver work, in which control of display modes is
being separated from access to the rendering engine. "So whenever an
application wants hardware-accelerated rendering, GPGPU access or
offscreen-rendering, it no longer needs to ask a graphics-server (via DRI
or wl_drm) but can instead open any available render node and start using
it. Access-control to render-nodes is done via standard file-system
modes. It’s no longer shared with mode-setting resources and thus can be
provided for less-privileged applications."