[fedora-arm] Re: Wandboard Quad RevD1 has no Ethernet in Fedora F31?

HI,

On Thu, April 16, 2020 4:21 am, Peter Robinson wrote:
> Hi Derek,
>
>> I just acquired a wandboard quad rev d1 (to replace an older dual-core
>> model), but apparently even though there is a revd1 DTB tree, the
>> ethernet
>> still isn't working.
>
> I have a Wandboard Quad B1 and ethernet works, I know others have other
> revs.

Me too. It's the D1 that doesn't work. Strangely I can plug the same SD
card into the B1 and it works, whereas in the D1 it does not. So there is
something strange going on.

>> According to http://forums.wandboard.org/viewtopic.php?t=1460 this issue
>> should have been fixed a couple years ago. Is there something special I
>> need to do to get fedora working on this board?
>
> I'm not sure the context of where that is fixed as I wasn't sure of
> where it was fixed. I suspect it was maybe in their downstream kernel
> fork. We only use upstream/mainline kernels.

I dont know.

> So for the vast majority of device support we rely on things being
> upstream, both in the linux kernel and in firmware like U-Boot. We
> don't have the resources to upstream everything and follow downstream
> problems/fixes for every random device.

Right, as we should expect. I'm surprised that a proposed change from
2017/2018 hasn't made it into mainline in 2-3 years!

> Looking at the upstream changes for the D1 specific rev I see the
> following since the D1 one support landed, nothing about network
> issues.
>
> So looking quickly at the post you mention, and looking at the
> upstream kernel commits back to when D1 support landed to 5.7-rc1
> there doesn't look to be anything network related:
> 404c0c9314f4 ARM: dts: imx6qdl: Fix memory node duplication
> d9359f580797 ARM: dts: imx6qdl-wandboard: Switch to SPDX identifier
> 5dda6159aaab ARM: dts: imx6qdl-wandboard: Switch to SPDX identifier
> 6e1386b2ee68 ARM: dts: imx6qdl-wandboard: Let the codec control MCLK
> pinctrl
> ad00e080eb75 ARM: dts: imx: Add memory node unit name
> 74fe676cb518 ARM: dts: imx6qdl-wandboard-revd1: Make EDID functional
> 7721dce68a30 ARM: dts: imx6qp-wandboard-revd1: Add sata support
> d016b46ac959 ARM: dts: imx6qdl-wandboard: Add support for the revd1
> variants

So where does this leave us? I am not at all sure where the problem lays.
I don't know if it's a GPIO issue or something else? But when I plug the
Rev D1 board in the ethernet lights do not light up at all, as if it's not
being powered on. And of course "ip addr" claims "NO CARRIER" for eth0.

Any idea how I can (help) debug this?

-derek

--
Derek Atkins 617-623-3745
derek@ihtfp.com www.ihtfp.com
Computer and Internet Security Consultant
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