During XDC this year, we heard a few presentations and had a lot of hallway talk about sharing code for driving DRM/KMS for display.
I think the general consensus is that there is enough shared functionality between all of the various DRM/KMS clients that we can start thinking about building a library that deals with the complexity of DRM/KMS and can help take full advantage of the hardware.
I've started writing up some ideas, mostly just goals, but also some random thoughts about how this might work. This is all in the 'liboutput' project on freedesktop.org:
https://gitlab.freedesktop.org/xorg/liboutput
I picked a spot in the 'xorg' namespace, not to confine this to X systems, but to reflect the goal that this be a library shared across all x.org-related projects, including Wayland compositors, EGL and Vulkan direct applications and the X server.
All there is at this point is a README.md file; I'd like to generate some consensus on a direction for the project before we start writing any actual design documents.
Please submit MRs to that repo, or respond to this email as you prefer.