xorg.conf

Section "Device"
            Identifier  "Rockchip Graphics"
       
        ## Use armsoc driver
        #   Driver          "armsoc"
        ## End armsoc configuration
       
        ## Use modesetting and glamor
            Driver      "modesetting"
            Option      "AccelMethod"    "glamor"     ### "glamor" to enable 3D acceleration, "none" to disable.
            Option      "DRI"            "2"
            Option      "Dri2Vsync"      "true"
            Option  "TripleBuffer"    "True"
        ## End glamor configuration
       
        EndSection
       
        Section "Screen"
            Identifier "Default Screen"
            SubSection "Display"
                Depth 24
                Modes "1920x1080" "1280x1024" "1024x768" "800x600"
            EndSubSection
        EndSection