Please refer "System Block Diagram" from the below HiKey_User_Guide_Rev0.2.pdf document,which shows "Audio Subsystem" => "Hi-Fi DSP"
Does Linaro has developed a driver to offload audio tasks to the Hi-Fi DSP?
If not how to access Hi-Fi DSP from the ARM processor? details of registers, kernel driver to use Hi-Fi DSP?
Please provide more details on how can we use Hi-Fi DSP capabilities on Hi-Key Linaro board.