I’m Using JP5.0DP, on my board there is a hardware mistake in PCB, on uart1, my TX was connected to RX only during UEFI. When in OS I can do some modify to disable this uart when Kernel was loading(by change dtb). it is sure that the best solution was hardware change. But I still need some walkaround from software/firmware site.
I want to know is there any solution to disable UART1 during UEFI(Only disable it during UEFI was OK), like modify DTB file that UEFI use or change some configuration file ?