Coreboot on Samsung Kevin

Hey guys,

i'm stumped and getting not much ideas on #coreboot on this.

I bought an ssd-bricked samsung kevin and want to compile coreboot for 
it to make it boot arch from sd without crossystem flags set.

My image compiles fine with the following hacks: use latest vboot, pin 
chromeec to commit before kevin support was dropped. I got an ec.bin to 
put into coreboot and enabled ELOG because i miss UART.

The image boots after 2-3 reboots with a red stripe (this happens even 
without included ec.bin): https://i.imgur.com/qXA4hvI.jpg

I take from it that basic init works. ELOG paste in hex is here: 
https://bpa.st/MYPQ - i cannot make any sense out of it.

My menuconfig options should be kinda fine, i used boardname kevin where 
applicable and copied config.gru to config.kevin for libpayload.

kevin has a soldered on servo header, but i will not be able to get my 
hands on a servo board from google, so i might try basic UART (no idea 
what this means honestly).

I like ARM architecture and would like to open similiar designs to 
https://github.com/SolidHal/PrawnOS

Any ideas are appreciated!

Thanks,

R

[Joel Kitching]

What you're seeing is the result of depthcharge's draw_fallback() function
being called, which prints a coloured box at the top of the screen when a
vboot UI function or a coreboot CBGFX function returns failure.  The red
one corresponds to the OS_BROKEN screen, so your next step might be to find
the recovery reason to figure out why the machine failed to boot.

On Thu, Jul 16, 2020 at 4:39 AM [e-mail]  wrote:
> Hey guys,
>
> i'm stumped and getting not much ideas on #coreboot on this.
>
> I bought an ssd-bricked samsung kevin and want to compile coreboot for
> it to make it boot arch from sd without crossystem flags set.
>
> My image compiles fine with the following hacks: use latest vboot, pin
> chromeec to commit before kevin support was dropped. I got an ec.bin to
> put into coreboot and enabled ELOG because i miss UART.
>
> The image boots after 2-3 reboots with a red stripe (this happens even
> without included ec.bin): https://i.imgur.com/qXA4hvI.jpg
>
> I take from it that basic init works. ELOG paste in hex is here:
> https://bpa.st/MYPQ - i cannot make any sense out of it.
>
> My menuconfig options should be kinda fine, i used boardname kevin where
> applicable and copied config.gru to config.kevin for libpayload.
>
> kevin has a soldered on servo header, but i will not be able to get my
> hands on a servo board from google, so i might try basic UART (no idea
> what this means honestly).
>
> I like ARM architecture and would like to open similiar designs to
> https://github.com/SolidHal/PrawnOS
>
> Any ideas are appreciated!
>
> Thanks,
>
> R
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