netdev - Re: mtk_eth_soc for mt7621 won't work after 6.0-rc1

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Date:   Tue, 13 Sep 2022 05:32:13 +0200
From:   Sergio Paracuellos <sergio.paracuellos@...il.com>
To:     Lorenzo Bianconi <lorenzo@...nel.org>
Cc:     Arınç ÜNAL <arinc.unal@...nc9.com>,
        netdev <netdev@...r.kernel.org>
Subject: Re: mtk_eth_soc for mt7621 won't work after 6.0-rc1

Hi Lorenzo,

On Mon, Sep 12, 2022 at 10:30 PM Lorenzo Bianconi <lorenzo@...nel.org> wrote:
>
> > Hi Lorenzo,
> >
> > On 12.09.2022 21:01, Lorenzo Bianconi wrote:
> > > > > Ethernet for MT7621 SoCs no longer works after changes introduced to
> > > > > mtk_eth_soc with 6.0-rc1. Ethernet interfaces initialise fine. Packets are
> > > > > sent out from the interface fine but won't be received on the interface.
> > > > >
> > > > > Tested with MT7530 DSA switch connected to gmac0 and ICPlus IP1001 PHY
> > > > > connected to gmac1 of the SoC.
> > > > >
> > > > > Last working kernel is 5.19. The issue is present on 6.0-rc5.
> > > > >
> > > > > Arınç
> > > >
> > > > Hi Arınç,
> > > >
> > > > thx for testing and reporting the issue. Can you please identify
> > > > the offending commit running git bisect?
> > > >
> > > > Regards,
> > > > Lorenzo
> > >
> > > Hi Arınç,
> > >
> > > just a small update. I tested a mt7621 based board (Buffalo WSR-1166DHP) with
> > > OpenWrt master + my mtk_eth_soc series and it works fine. Can you please
> > > provide more details about your development board/environment?
> >
> > I've got a GB-PC2, Sergio has got a GB-PC1. We both use Neil's gnubee-tools
> > which makes an image with filesystem and any Linux kernel of choice with
> > slight modifications (maybe not at all) on the kernel.
> >
> > https://github.com/neilbrown/gnubee-tools
> >
> > Sergio experiences the same problem on GB-PC1.
>
> ack, can you please run git bisect in order to identify the offending commit?
> What is the latest kernel version that is working properly? 5.19.8?

I'll try to get time today to properly bisect and identify the
offending commit. I get a working platform with 5.19.8, yes but with
v6-rc-1 my network is totally broken.

Thanks,
    Sergio Paracuellos

>
> Regards,
> Lorenzo
>
> >
> > Arınç