netdev - Re: [PATCH net-next v7 2/3] net: phy: add support for clause 37 auto-negotiation

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Date:   Mon, 19 Aug 2019 23:22:46 +0000
From:   Tao Ren <taoren@...com>
To:     René van Dorst <opensource@...rst.com>
CC:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Vladimir Oltean <olteanv@...il.com>,
        Arun Parameswaran <arun.parameswaran@...adcom.com>,
        Justin Chen <justinpopo6@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "openbmc@...ts.ozlabs.org" <openbmc@...ts.ozlabs.org>
Subject: Re: [PATCH net-next v7 2/3] net: phy: add support for clause 37
 auto-negotiation

On 8/19/19 4:15 PM, René van Dorst wrote:
> Hi Tao,
> 
> Quoting Tao Ren <taoren@...com>:
> 
>> On 8/11/19 4:40 PM, Tao Ren wrote:
>>> From: Heiner Kallweit <hkallweit1@...il.com>
>>>
>>> This patch adds support for clause 37 1000Base-X auto-negotiation.
>>>
>>> Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
>>> Signed-off-by: Tao Ren <taoren@...com>
>>
>> A kind reminder: could someone help to review the patch when you have bandwidth?
>>
> 
> FWIW: I have a similar setup with my device. MAC -> PHY -> SFP cage.
> PHY is a Qualcomm at8031 and is used as a RGMII-to-SerDes converter.
> SerDes only support 100Base-FX and 1000Base-X in this converter mode.
> PHY also supports a RJ45 port but that is not wired on my device.
> 
> I converted [0] at803x driver to make use of the PHYLINK API for SFP cage and
> also of these new c37 functions.
> 
> In autoneg on and off, it detects the link and can ping a host on the network.
> Tested with 1gbit BiDi optical(1000Base-X) and RJ45 module(SGMII).
> Both work and both devices detects unplug and plug-in of the cable.
> 
> output of ethtool:
> 
> Autoneg on
> Settings for lan5:
>         Supported ports: [ TP MII ]
>         Supported link modes:   100baseT/Half 100baseT/Full
>                                 1000baseT/Full
>                                 1000baseX/Full
>         Supported pause frame use: Symmetric Receive-only
>         Supports auto-negotiation: Yes
>         Supported FEC modes: Not reported
>         Advertised link modes:  100baseT/Half 100baseT/Full
>                                 1000baseT/Full
>                                 1000baseX/Full
>         Advertised pause frame use: Symmetric Receive-only
>         Advertised auto-negotiation: Yes
>         Advertised FEC modes: Not reported
>         Link partner advertised link modes:  1000baseX/Full
>         Link partner advertised pause frame use: Symmetric Receive-only
>         Link partner advertised auto-negotiation: Yes
>         Link partner advertised FEC modes: Not reported
>         Speed: 1000Mb/s
>         Duplex: Full
>         Port: MII
>         PHYAD: 7
>         Transceiver: internal
>         Auto-negotiation: on
>         Supports Wake-on: g
>         Wake-on: d
>         Link detected: yes
> 
> Autoneg off
> Settings for lan5:
>         Supported ports: [ TP MII ]
>         Supported link modes:   100baseT/Half 100baseT/Full
>                                 1000baseT/Full
>                                 1000baseX/Full
>         Supported pause frame use: Symmetric Receive-only
>         Supports auto-negotiation: Yes
>         Supported FEC modes: Not reported
>         Advertised link modes:  1000baseT/Full
>         Advertised pause frame use: Symmetric Receive-only
>         Advertised auto-negotiation: No
>         Advertised FEC modes: Not reported
>         Speed: 1000Mb/s
>         Duplex: Full
>         Port: MII
>         PHYAD: 7
>         Transceiver: internal
>         Auto-negotiation: off
>         Supports Wake-on: g
>         Wake-on: d
>         Link detected: yes
> 
> Tested-by: René van Dorst <opensource@...rst.com>
> 
> Greats,
> 
> René

Great. Thank you for the testing, René.


Cheers,

Tao