Dual Display Framebuffer Settings


I am attempting to get the Rock960 to work with dual displays on Android. One display is an automotive instrument cluster so it has a weird resolution, 1280x480. I finally got the output for that display working, but only after changing the frame buffer to persist.sys.framebuffer.main=1280x480 in device/rockchip/rk3399/rk3399_box/system.prop However, my main display is now very distorted. Is there a property such as persist.sys.framebuffer.secondary=1920x1080 that I can add or anything of the sort?



How do you output dual display? HDMI and USB type C? Or mipi?

I am using HDMI and DP via USB C. The Resolution of the display connected to HDMI is 1280x480 and the display connected to DP is 1280x720. I also posted here, but none of the suggestions fixed my issue.

I plan to use androids Presentation class to output different content to the individual displays. https://developer.android.com/reference/android/app/Presentation

Any help is very appreciated.