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drm: add support for render nodes.
Allow vaGetDisplayDRM() to accept DRM Render-Nodes file descriptors,
thus skipping authentication burdens in that case. This also allows
remote users, connected through ssh for instance, to enjoy hardware
acceleration even if there is a local display opened (user logged in).
Signed-off-by: Andrey Larionov <andrey.larionov@intel.com>
[checked if fd is a render-node, fixed VA_DISPLAY_DRM_RENDERNODES]
Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
Reviewed-by: Sean V Kelley <sean.v.kelley@intel.com>
Tested-by: Rafal A Sapala <rafal.a.sapala@intel.com>