Re: [Buildroot] [PATCH 2/2] configs/rock5b_defconfig: enable uboot-env on the SD card

[Thomas Petazzoni via buildroot <buildroot@buildroot.org>]

Hello Niklas,

It was nice meeting you during Linux Plumbers last week!

On Tue, 17 Sep 2024 08:35:16 +0000
Niklas Cassel <Niklas.Cassel@wdc.com> wrote:

> > This won't work because the output directory is not always output/. But
> > I believe this is useless, because you're creating an image of what is
> > the default environment. So basically, you should instead not create an
> > environment image at all: just tell U-Boot that the environment is at
> > offset XYZ (or even better, in partition X). The environment partition
> > will contain nothing or garbage, so at the first boot, U-Boot will use
> > its built-in environment itself, and at the first "saveenv", it will
> > save the environment to the designated partition.  
> 
> Well, what happens if you simply point to an offset or partition that is
> empty, is that uboot will see an empty environment, so it will see bootcmd
> as empty, so it will just enter the uboot command prompt without booting
> anything at all.

This is not what should happen. Indeed, if the environment on the
non-volatile storage is empty or corrupted, U-Boot should ignore it,
and load its built-in environment (which is compiled into the U-Boot
binary). Why isn't this working for you?

Best regards,

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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