Start by tracing exist open source Intel/AMD driver in linux:
Can be for old laptop (T420, etc with Intel GPU/Driver.)
Use FTRACE in kernel.
Setup ebpf trace for GPU acitivies.
Write some doc/blog/medium pages on the process and show off your works.
Understand, document and improve some opensource GPU API related utilities
Understand and document interaction between GPU/GUI App and OpenSource driver.
