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How to enable UART debug logs during the U-Boot stage on Rock5B?

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Hello, currently on Rock5B running Armbian 24, I am not seeing the U-Boot output logs during UART debugging. Where in the source code can I enable this? Thank you.
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Solved by lyh

The first question is: What U-boot binary blob is written to your storage?

 

In my installation, the U-boot binary blob is not written during upgrade. I do this myself with dd. Was originally some 2017 version.

 

I always had all text displayed. The loglevel in armbianEnv.txt is for kernel, although mine is at 7, but that should not matter for U-boot AFAIK.

 

I have a NanoPi-R6C (is RK3588S) but also several other Armbians, did apt update && apt upgrade yesterday (current branch). Now kernel 6.12.1 and also a newer U-boot. The version is listed in:

/usr/share/doc/linux-u-boot-nanopi-r6c-current/changelog.gz

 

mine is:

Similar path specific for your Rock 5B. Should come from package 'linux-u-boot-rock-5b-current/bookworm 25.2.0-trunk.100 arm64' or later.

The use configuration used for compile is: /usr/lib/u-boot/nanopi-r6c-rk3588s_defconfig
Again, similar path specific for your Rock 5B.

 

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