This patchset add support for the rk3399 edp. It has been tested on the pinebook pro devices. The only missing part is a hack used to get stable edp output after a warn reset, which is possibly specific to this device. I'm not sure if it's suitable for merge.
The changes have been written by studying the linux code, since I didn't find any manual for theses part of the RK3399 SoC.
On the linux kernel side, on recent kernels, it needs commit "pwm: rockchip: Keep enabled PWMs running while probing" otherwise the pinebook pro will freeze when probing the display.
The kernel is also randomly failing to display something on my device. When this occurs, the kernel has this following message: rockchip-pm-domain ff310000.power-management:power-controller: failed to set idle on domain 'pd_vopl', val=0 I've yet to find what's the issue.
Arnaud