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Welcome to the linux-rk3588-midstream wiki!

Working:

• Serial console
• LED heartbeat
• PCIe 3.0 (NVMe)
• PCIe 2.0 (Wi-Fi)
• SPI flash
• Type-C / PD negotiation
• USB 2.0 and 3.0 Type-A ports
• Boot to userspace (from NVMe)
• Ethernet (make sure you enable it in kconfig)
• HDMI out (both ports - tested up to 1080p60)
• cpufreq scaling (up to 2.2 GHz, using standard Linux governors)
• CPU thermal monitoring
• eDP display output (*)
• MicroSD (only if inserted on boot)

Not working:

• USB or DP over Type-C port (USB-DP PHY issue)
• HDMI in
• MicroSD hotplug
• PVTM
• Full cpufreq range
• GPU acceleration

Not tested:

• Everything else

(*) The Rock 5B doesn't have an eDP connector. However, eDP pins are shared with HDMI, so with a custom passive cable, it is possible to attach a DisplayPort-compatible display. The cable needs to be wired as follows:

• GND -> GND
• TMDS0(-) -> Lane 0(-)
• TMDS0(+) -> Lane 0(+)
• TMDS1(-) -> Lane 1(-)
• TMDS1(+) -> Lane 1(+)
• TMDS2(-) -> Lane 2(-)
• TMDS2(+) -> Lane 2(+)
• TMDS Clock(-) -> Lane 3(-)
• TMDS Clock(+) -> Lane 3(+)
• HEC(-) -> AUX(-)
• HEC(+) -> AUX(+)
• CEC -> HPD

All others can be left unconnected.

I also had to add cma=256M to the kernel command line to make display output work, probably because of vop_mmu being disabled.