We have obtained a customized carrier board for Jetson Nano SoM(P3448) and verified that we can login Ubuntu system through debug serial port.
The customized carrier board use MIPI DSI instead of HDMI/DP for display and the DSI screen is black after the system is powered on. We learned that the default DTB used by official provided image is tegra210-p3448-0000-p3449-0000-a02.dtb, which does not contain DSI device. So we want to update the .dtb file to tegra210-p3448-0000-p3449-0000-a02-hdmi-dsi.dtb.
It seems that Linux_for_Tegra/flash.sh deal with flash related task. How to only flash DTB file by flash.sh?