Re: [Buildroot] [help] configs/rock5b_defconfig: Switch to mainline kernel

["kilian.zinnecker--- via buildroot" <buildroot@buildroot.org>]

Hello Arnout, all,

I was told that from kernel 6.7 on the ethernet of the Rock5B is supported, so 
I switched to that version (precisely 6.7.4 currently).

>   Clearly, the rootfs is on mmcblk1p2, not mmcblk0p2. So if you have
> mmcblk0p2 on your command line, and rootwait, it will just wait
> indefinitely for the rootfs to appear.

Yes, correct, when I switch to mmcblk1p2 it works now! But I also switched to 
kernel 6.7.4 for now and switched the console in the bootargs to ttyS2 again.

> > [   31.717905] vdd_gpu_s0: disabling
> > [  115.285576] random: crng init done
> 
>   That's pretty late for the RNG to be initialized, you'll need the RNG
> seeder from userspace - but this is enabled by default in Buildroot I
> think.

How could I check that?

> > Of course it could be, that it is just not configured anymore to put a
> > shell on the serial interface, but I already tried to address that with:
> > 
> > BR2_TARGET_GENERIC_GETTY=y
> > BR2_TARGET_GENERIC_GETTY_PORT="serial2"
> > 
> > However, that did not seem to help. Could it be, that there is something
> > wrong with the SD card formatting? It at least complains about it, but I
> > am too unfamiliar with that, so I don't know whether it is a problem.
> 
>   That's normal. It's because the generated image is not the exact size of
> your SD card, so the backup GPT partition table is somewhere in the middle
> instead of at the end. You can run parted on your laptop after writing the
> SD card and before booting it to fix the issue. But it shouldn't make any
> difference at all for booting.

Thanks, I am not familiar with this and thought, it might cause some troubles.

Currently the Rock5B does boot now with the 6.7.4 upstream kernel, but 
ethernet does not work yet. I try to figure out how to get it working, then I 
will submit a patch.

Thanks for your help and best regards,
Kilian



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