It would be very difficult to get accepted. You'd have to get the AMDGPU driver maintainers on board, and you'd probably have to do a lot of it at once to just

It would be very difficult to get accepted. You'd have to get the AMDGPU driver maintainers on board, and you'd probably have to do a lot of it at once to justify the change. It would also take some discussion, and you're talking about refactoring a lot of stuff which probably moves underneath you during this, so you have to keep iterating to keep up with the changes, all without knowing if they'll even end up taking it... Changes like this are probably a good way to get started but I would guess the AMDGPU driver is one of the worst places to get started as a beginner.