Open-Source Radeon Driver Reworks Audio Code, Adds DisplayPort Audio
Alex Deucher published a large set of Radeon DRM patches that rework the Radeon Linux driver's audio support. The 24 patches adjust over one thousand lines of kernel code.
These patches clean-up the driver's audio handling and add support for DisplayPort audio on all supported AMD GPUs, per this patch series.
Assuming these patches are in good shape, they're possible material for the Linux 3.20 kernel.
Sadly there's nothing new to report on the awaited AMDGPU kernel driver for supporting the R9 285 Tonga and newer GPUs that's needed for the new AMD unified Linux driver approach. Due to the change last year in how DRM-Next is handled, there's just one or two weeks left before the 3.20 DRM merge window will close. The AMDGPU driver would also have to go through public review by upstream developers outside of AMD, which already would make this new driver more like a Linux 3.21 (or later) feature. At least for 3.20 there's other changes worth getting excited over.