Which tag shoud I use for rock pi 4b

[markhsumark]

Hi, I am a student researching TrustZone with a keen interest in integrating GPU functionality within TrustZone environments.

I’m looking for a Linux kernel for the Rock Pi 4B to replace the existing Linux kernel in the OP-TEE project. I would like to know which branch or tag would be most suitable and stable.

Thanks.