netdev - Re: [PATCH RFC net-next v2 0/7] net: dsa: mt7530: updates for phylink changes

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Message-ID: <YiCIoh0bhWe9xnjm@shell.armlinux.org.uk>
Date:   Thu, 3 Mar 2022 09:21:38 +0000
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Sean Wang <sean.wang@...iatek.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH RFC net-next v2 0/7] net: dsa: mt7530: updates for
 phylink changes

On Wed, Feb 23, 2022 at 11:33:56AM +0000, Russell King (Oracle) wrote:
> Hi,
> 
> This revised series is a partial conversion of the mt7530 DSA driver to
> the modern phylink infrastructure. This driver has some exceptional
> cases which prevent - at the moment - its full conversion (particularly
> with the Autoneg bit) to using phylink_generic_validate().
> 
> Patch 1 fixes the incorrect test highlighted in the first RFC series.
> 
> Patch 2 fixes the incorrect assumption that RGMII is unable to support
> 1000BASE-X.
> 
> Patch 3 populates the supported_interfaces for each port
> 
> Patch 4 removes the interface checks that become unnecessary as a result
> of patch 3.
> 
> Patch 5 removes use of phylink_helper_basex_speed() which is no longer
> required by phylink.
> 
> Patch 6 becomes possible after patch 5, only indicating the ethtool
> modes that can be supported with a particular interface mode - this
> involves removing some modes and adding others as per phylink
> documentation.
> 
> Patch 7 switches the driver to use phylink_get_linkmodes(), which moves
> the driver as close as we can to phylink_generic_validate() due to the
> Autoneg bit issue mentioned above.
> 
> Patch 8 converts the driver to the phylink pcs support, removing a bunch
> of driver private indirected methods. We include TRGMII as a PCS even
> though strictly TRGMII does not have a PCS. This is convenient to allow
> the change in patch 9 to be made.
> 
> Patch 9 moves the special autoneg handling to the PCS validate method,
> which means we can convert the MAC side to the generic validator.
> 
> Patch 10 marks the driver as non-legacy.
> 
> Please review and test, thanks.
> 
>  drivers/net/dsa/mt7530.c | 330 +++++++++++++++++++++--------------------------
>  drivers/net/dsa/mt7530.h |  26 ++--
>  2 files changed, 159 insertions(+), 197 deletions(-)

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