These are various ideas to learn about device trees and test the upstream vc4 graphics drivers on RPI3
Learn about device tree (firmware vs kernel), and how to use device tree overlays.
There is a DRM graphics driver (kernel + mesa) for the RPI vc4: Test it on Tumbleweed (or SLES), report bugs. See that device tree + overlays are setup correctly. Non-upstream bits from the above repo are likely needed. Caveat: Developer focuses on Raspbian, so I am not sure what works on openSUSE yet. But this is part of the project.
Help fix VC4 (Videocore RPI) issues in the same repo
Help fix VC4 mesa driver issues.
Test RPI camera driver, see if dmabuf sharing works.
Implement RPI3 input driver for RPI foundation 7'' touchscreen (although broadcom developer is also going to do this)
Test the VCHIQ driver (this arbitrates between ARM and VPU) currently at drivers/staging
This project is one of its kind!