Hi Adrian,
I can review and sponsor the package for you, I wasn't aware that you had a package ready.
I checked quickly, upstream is indeed working on fixing this video driver. They released a new version in December (1.2.3), but there's more activity on the master branch right now.
I'll see if I can update the package to 1.2.3 (or later).Work was stalled previously, because the package was broken and stopped building with newer Xorg releases. The Xorg team was also reluctant to introduce a maintainer-fixed package that is only relevant for one Debian ports architecture. I think this should no longer be an issue if upstream is working on it.
Regards, Gregor