Rockpi 4C displays half desktop when in DP output using Android 10

Hi Guys

I’m a beginner and testing 4C with Android 10 & DP output but my display only shows half of the desktop.
Anyone has the same issue or can someone solve this problem?

What’s the resolution of your monitor? Not all monitor support 2 lanes DP and reports the right EDID. Check the monitor OSD for the current resolution.