[PATCH 2/6] drm: Allow render nodes to query display objects

[Keith Packard]

Daniel Vetter <daniel at ffwll.ch> writes:

> One more that came up on irc after discussion why this is needed: The
> userspace side using this won't work on split gpus where the render node
> has 0 displays, and hence where you really need to query the compositor
> anyway.

Agreed -- using the X connection to get the information should let this
work on split systems. Within the Vulkan code, I already have to move
objects from the render node to the display node. Hrm. That exposes a
weakness in the kms_display extension I've proposed; that only allows
you to pass a single fd. Passing separate display and render fds through
that interface seems like a pretty useful change.

-- 
-keith
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