Well known contributor C. Bergström posted to dri-devel: "PathScale is in need of 1-2 kernel devs who are interested to help improve the AMD open source drivers for compute workloads. If you're passionate or interested to improve AMD drivers ping me offlist. In the near future we specifically want to work on Hawaii dGPU support as well as APU. Depending on benchmark results we may also need to improve the memory manager to better support cards with 4G+ of on-board ram."
The improvements to the compute support within the open-source AMD Linux driver is very understandable and of much relevance to PathScale. Tom Stellard at AMD has been near single-handedly working on the compute support and AMD GPU LLVM back-end for years. He's making progress and some basic OpenCL apps will work with the latest open-source driver code, but it isn't yet full-functioning or on par with most proprietary drivers. There aren't many (or any) tier-one Linux distributions shipping with any open-source OpenCL driver stack, but Fedora 21 will likely change that later in the year.
Any improvements PathScale can do to the open-source Radeon R9 290 "Hawaii" GPU support is also a big win... While the hardware has been out for the better part of one year, it doesn't work well (at all with OpenGL...) with the latest driver stack. AMD's response about the open Hawaii support is they don't know why it doesn't work and Hawaii support isn't a priority at the moment.
It's also worth pointing out that PathScale previously gave away NVIDIA graphics cards to Nouveau developers when trying to improve that driver's stack for compute purposes. PathScale also ported Nouveau to OpenSolaris, temporarily forked Nouveau, and they've done other interesting stuff.
To see the latest state of the open-source Linux graphics drivers, we have many interesting tests coming next week.