Hi Terry,
I think you didn’t enable the dsi in your device tree.
This is pointed out in your previous thread.
https://devtalk.nvidia.com/default/topic/1071552/r32-3-1-how-to-make-a-mipi-dsi-display-work-/
IMO, you could just use one thread to track your issue. It does not help to file so many topics to ask same problem.
Also, for such issue, generally you need to share your current dmesg and dts file converted from dtb.
You already read many other posts here so I think you may already saw other users shared their log.