rk3399-gru-kevin: issues on bringup

[Marty E. Plummer]

On Tue, Feb 23, 2021 at 10:10:11AM -0500, Simon Glass wrote:
> Hi Marty,
> 
> On Thu, 13 Aug 2020 at 13:35, Alper Nebi Yasak <alpernebiyasak at gmail.com> wrote:
> >
> > Hi Simon, Marty,
> >
> > I'm interested in getting U-Boot to work with Kevin as well, but don't
> > have a Servo (or the willingness to open up the case yet), so I've been
> > trying to boot from depthcharge as in README.chromium-chainload.
> >
> > I don't have a way to see serial output and I see no other signs of
> > life. Can you give me a tested configuration that immediately powers-off
> > or reboots a Kevin so I can confirm what I'm doing works on the
> > chainloading side? I mean I can boot Linux, but trying the same with
> > U-Boot just gives me a blank screen even after accounting for a lot of
> > things.
> >
> > Meanwhile, I've wrote some code to automate making depthcharge partition
> > images, and to enable the display on Kevin (and perhaps Bob). Since I
> > don't know if chainloading works, I don't know if these are broken or
> > not either. I'm unsure about sending untested patches to the list, so I
> > put them up here if you want to take a look (and maybe test/fix them?):
> >
> > https://github.com/alpernebbi/u-boot/tree/rk3399-gru-kevin/wip
> >
> > They're not really things that'd make a non-booting Kevin boot, though.
> > I hope at least some of it can be useful in some way.
> 
> I am just replying here as you asked for some details on IRC. What
> details do you need?
> 
Well, if its possible to actually do openocd/etc on the AP using a
servo, I'd like to know how. All the documentation I could find is about
using openocd to flash the EC, not debug the AP.
> I was intending to try out a kevin if I have one. I will add that to my list.
> 
> Regards,
> Simon