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