netdev - Re: [PATCH v4 net-next 3/8] net: phy: bcm84881: move the in-band capability check where it belongs

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Date:   Wed, 23 Nov 2022 13:11:23 +0000
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        UNGLinuxDriver@...rochip.com,
        bcm-kernel-feedback-list@...adcom.com,
        Madalin Bucur <madalin.bucur@....nxp.com>,
        Camelia Groza <camelia.groza@....com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        Maxim Kochetkov <fido_max@...ox.ru>,
        Sean Anderson <sean.anderson@...o.com>,
        Antoine Tenart <atenart@...nel.org>,
        Michael Walle <michael@...le.cc>,
        Raag Jadav <raagjadav@...il.com>,
        Siddharth Vadapalli <s-vadapalli@...com>,
        Ong Boon Leong <boon.leong.ong@...el.com>,
        Colin Foster <colin.foster@...advantage.com>,
        Marek Behun <marek.behun@....cz>
Subject: Re: [PATCH v4 net-next 3/8] net: phy: bcm84881: move the in-band
 capability check where it belongs

On Wed, Nov 23, 2022 at 12:08:11PM +0000, Russell King (Oracle) wrote:
> On Tue, Nov 22, 2022 at 09:36:59PM +0200, Vladimir Oltean wrote:
> > I think we're in agreement, but please let's wait until tomorrow, I need
> > to take a break for today.
> 
> I think we do have a sort of agreement... but lets give this a go. The
> following should be sufficient for copper SFP modules using the 88E1111
> PHY. However, I haven't build-tested this patch yet.
> 
> Reading through the documentation has brought up some worms in this
> area. :(
> 
> It may be worth printing the fiber page BMCR and extsr at various
> strategic points in this driver and reporting back if things don't
> seem to be working right for your modules. In the mean time, I'll try
> to see how the modules in the Honeycomb appear to be setup at power-up
> and after the driver has configured the PHY... assuming I left both
> MicroUSBs connected and the board has a network connection via the
> main ethernet jack.

Unfortunately, I don't have a SFP with an 88e1111 plugged in, only the
bcm84881, so I can't test my patch remotely. However, it builds fine
when the appropriate TIMEOUT definition is added.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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