netdev - Re: Question: Ethernet Phy issues on Colibri IMX8X (imx8qxp)

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Date:   Thu, 11 Aug 2022 08:07:50 +0000
From:   Philippe Schenker <philippe.schenker@...adex.com>
To:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "embed3d@...il.com" <embed3d@...il.com>,
        "qiangqing.zhang@....com" <qiangqing.zhang@....com>
CC:     "philipp.rossak@...mulastudent.de" <philipp.rossak@...mulastudent.de>,
        "guoniu.zhou@....com" <guoniu.zhou@....com>,
        "aisheng.dong@....com" <aisheng.dong@....com>,
        "abel.vesa@....com" <abel.vesa@....com>,
        "andrew@...n.ch" <andrew@...n.ch>
Subject: Re: Question: Ethernet Phy issues on Colibri IMX8X (imx8qxp) - kernel
 5.19

On Wed, 2022-08-10 at 20:40 +0200, Philipp Rossak wrote:
> > Hi Marcel,
> > 
> > thanks!
> > 
> > With the removed line it is working now!
> > 
> > I hope there will be a mainlined solution soon.

This is an interesting question. Since it's a SCFW issue and a general
question about these SoCs, I'll take the liberty of hijacking this
thread for some questions (since NXP is also in the loop now).

@NXP people: which SCFW version should be used in general with mainline
linux-kernel ?
And how is it planned to proceed with SC-firmware enabled SoCs on
mainline linux?
Is the SCFW API backward compatible?
If so, from which version on?

Thanks in advance for enlightening us all on this SCFW issue.

Philippe

> > Cheers
> > Philipp
> > 
> > On 10.08.22 10:05, Marcel Ziswiler wrote:
> > > > Sali Philipp
> > > > 
> > > > On Wed, 2022-08-10 at 00:55 +0200, Philipp Rossak wrote:
> > > > > > Hi,
> > > > > > 
> > > > > > I currently have a project with a Toradex Colibri IMX8X SOM
> > > > > > board> >> whith
> > > > > > an onboard Micrel KSZ8041NL Ethernet PHY.
> > > > > > 
> > > > > > The hardware is described in the devictree properly so I
> > > > > > expected> >> that
> > > > > > the onboard Ethernet with the phy is working.
> > > > > > 
> > > > > > Currently I'm not able to get the link up.
> > > > > > 
> > > > > > I already compared it to the BSP kernel, but I didn't found>
> > > > > > >> anything
> > > > > > helpful. The BSP kernel is working.
> > > > > > 
> > > > > > Do you know if there is something in the kernel missing and
> > > > > > got it> >> running?
> > > > 
> > > > Yes, you may just revert the following commit babfaa9556d7
> > > > ("clk:> >imx: scu: add more scu clocks")
> > > > 
> > > > Alternatively, just commenting out the following single line
> > > > also> >helps:
> > > > 
> > > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/clk/imx/clk-imx8qxp.c?h=v5.19#n172
> > > > 
> > > > I just found this out about two weeks ago before I went to
> > > > vacation> >and since have to find out with NXP what
> > > > exactly the idea of this clocking/SCFW stuff is related to our>
> > > > >hardware.
> > > > 
> > > > @NXP: If any of you guys could shed some light that would be
> > > > much> >appreciated. Thanks!
> > > > 
> > > > > > Thanks,
> > > > > > Philipp
> > > > 
> > > > Cheers
> > > > 
> > > > Marcel
> >