Rock Pi 4 HDMI Timings for AMOLED 5.5"

[bonmis]

Hi

I need add custom hdmi timings for LCD Waveshare 5.5" AMOLED.

LCD works fine on RPI 4. On Armbian I see 1/3 screen only.

Custom timings for RPI is:

hdmi_timings=1080 1 26 4 50 1920 1 8 2 6 0 0 0 60 0 135580000 3

 

How to set it in Armbian image? In /boot/armbianEnv.txt or /boot/boot.scr or with xrandr ?

 

[Werner]

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