yocto-tinkerboard

Yocto OS sources for Asus Tinker board

Features

VPU - Hardware accelerated decoding & encoding
Gstreamer support for VPU
Mali Kernel & user space libraries (OpenCL is the best)
WiFi
Video processing libraries (FFMPEG, OpenCV etc.,)
Nodejs Webserver

You will have to edit build/conf/local.conf to enable/disable the modules you prefer.

Building Yocto OS

$ . ./setup-environment

$ bitbake core-image-sato

Rockchip's yocto instructions are here http://rockchip.wikidot.com/yocto-user-guide and have been hugely helpful. Rockchip linux group - https://github.com/rockchip-linux