Herrmann: Splitting DRM and KMS device nodes

[Posted September 2, 2013 by corbet]

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."

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