Override default video mode
Default Digi Embedded for Android settings also configure all video interfaces. You can override the configuration by using the extra_bootargs variable in the U-Boot environment.
Note Digi recommends that you change the video mode in the kernel device tree once verification is complete.
Boot with HDMI only
=> setenv extra_bootargs video=mxcfb0:dev=hdmi,1920x1080M@60 video=mxcfb1:off video=mxcfb2:off video=mxcfb3:off => saveenv
Boot with LVDS only
=> setenv extra_bootargs video=mxcfb0:dev=ldb,bpp=16,if=RGB666 video=mxcfb1:off video=mxcfb2:off video=mxcfb3:off => saveenv
Boot with LVDS primary and HDMI secondary
=> setenv extra_bootargs video=mxcfb0:dev=ldb,bpp=16,if=RGB666 video=mxcfb1:dev=hdmi,1920x1080M@60 video=mxcfb2:off video=mxcfb3:off => saveenv
Boot with HDMI primary and LVDS secondary
=> setenv extra_bootargs video=mxcfb0:dev=hdmi,1920x1080M@60 video=mxcfb1:dev=ldb,bpp=16,if=RGB666 video=mxcfb2:off video=mxcfb3:off => saveenv
Boot with dual LVDS
=> setenv extra_bootargs video=mxcfb0:dev=ldb,bpp=16,if=RGB666 video=mxcfb1:dev=ldb,bpp=16,if=RGB666 video=mxcfb2:off video=mxcfb3:off => saveenv