U-Boot video output for rk3588

John Clark inindev at gmail.com
Thu Aug 3 12:53:00 CEST 2023

fwiw, I grabbed this terminal code written in go out of the tinygo 
project: https://github.com/inindev/goterm

It is less than 100 lines long and it supports the rockchip 1.5M baud 
rate well (ctrl+] to exit).

On 8/2/23 6:50 PM, Sebastian Reichel wrote:
> Hi,
> On Wed, Aug 02, 2023 at 03:19:04PM -0600, Simon Glass wrote:
>> On Wed, 2 Aug 2023 at 15:03, Simon Glass <sjg at chromium.org> wrote:
>>> Does anyone know how to enable HDMI output on this device in U-Boot,
>>> e.g. on rock5b?
> Upstream kernel does not yet support RK3588 HDMI output, but
> Cristian Ciocaltea (added in Cc) is working on it. For U-Boot
> AFAIK nobody is working on extending the drivers in
> drivers/video/rockchip/* at the moment.
>> Also, how do I make serial console, or earlycon work on this
>> board?
> The upstream Kernel stdout-path defined in the Rock 5B DT, so
> serial should work OOTB. But - like all Rockchip devices - RK3588
> boards use 1500000 Baud instead of the common 115200. Some
> USB serial adapters are too slow for that. See also:
> https://wiki.radxa.com/Rock5/dev/serial-console
> Greetings,
> -- Sebastian

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