Compile mainline kernel for RK3399 for SDCard

Kamikaze84

Hi,

I own a Firefly-RK3399 2GB variant, and wanted to create an SDCard image with a mainline kernel that I could boot in conjunction with a Firefly provided eMMC.

After spending way too much time figuring out how this was all put together, I've finally achieved the result I wanted.

The majority of the steps I've taken are documented in a github, here: https://github.com/VenKamikaze/f ... rking-4.16-rockchip

Note that I first flashed my eMMC with a Firefly RK3399 provided image, I believe it was an image from sometime in 2018-04, but don't recall the exact date. This might be necessary as I think I read somewhere that they changed their u-boot sometime in mid-2017 to also search for resource/kernels on SDCard before booting using resource/kernel on eMMC.

I also hit issues on bootup with the fan53555 & pwm_regulator modules causing hanging on my board. If you get these issues, you may have to consider patching your device tree to allow these modules to work. Without them, cpufreq will not be able to ramp up processor frequencies and you'll be stuck on the lowest frequencies. I am not certain the DT patch I have implemented is stable and AFAIK no one else has tested it.

Anyway, I hope this helps someone.

leung先森

Nice try . It will help a lot .