Atomic Async Page Flips Proposed, Valve's Gamescope Compositor Has Support Pending

Async page flipping via DRM_MODE_PAGE_FLIP_ASYNC has been available with the Direct Rendering Manager's legacy API but hasn't been supported by the atomic mode-setting interface. However, a proposed patch series would add that atomic async flip support and wire it up initially for the AMDGPU DRM driver. Meanwhile Valve's Gamescope compositor in user-space would be ready to make use of it...