Thanks a lot ljking,
I could passed a long time before figuring that.
My board was initially made to run a 3.18 kernel, and I’m indeed looking for
So What I did is reflashing my board using the instruction for board recovery
Although I’m using a different board than db820c with a different ufs, it succeed, and even boot.
It’s working, now I can boot linaro kernel, and have a perfect and clean Yocto setup,
with a LTS kernel with shiny features as camera support, video encoding, audio, dsp, gpu.
Thanks a lot,
You made my day