linux-kernel - Re: [PATCH net-next] Revert "net: ethernet: ti: am65-cpsw: fixup PHY mode for fixed RGMII TX delay"

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Message-ID: <734CD0B0-9104-45C8-A8E5-679FC7B7A346@walle.cc>
Date: Thu, 18 Sep 2025 17:11:50 +0200
From: Michael Walle <michael@...le.cc>
To: Jakub Kicinski <kuba@...nel.org>,
 Matthias Schiffer <matthias.schiffer@...tq-group.com>
CC: Michael Walle <mwalle@...nel.org>, Siddharth Vadapalli <s-vadapalli@...com>,
 Andrew Lunn <andrew@...n.ch>, Nishanth Menon <nm@...com>,
 Vignesh Raghavendra <vigneshr@...com>, Tero Kristo <kristo@...nel.org>,
 Andrew Lunn <andrew+netdev@...n.ch>,
 "David S . Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Paolo Abeni <pabeni@...hat.com>, Roger Quadros <rogerq@...nel.org>,
 Simon Horman <horms@...nel.org>,
 Maxime Chevallier <maxime.chevallier@...tlin.com>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux@...tq-group.com
Subject: Re: [PATCH net-next] Revert "net: ethernet: ti: am65-cpsw: fixup PHY mode for fixed RGMII TX delay"

[reply all this time..] 

Am 18. September 2025 16:56:51 MESZ schrieb Jakub Kicinski <kuba@...nel.org>:
>On Mon, 04 Aug 2025 15:45:08 +0200 Matthias Schiffer wrote:
>> > > Disabling the TX delay may or may not result in an operational system.
>> > > This holds true for all SoCs with various CPSW instances that are
>> > > programmed by the am65-cpsw-nuss.c driver along with the phy-gmii-sel.c
>> > > driver.  
>> > 
>> > In that case u-boot shall be fixed, soon. And to workaround older
>> > u-boot versions, linux shall always enable that delay, like Andrew
>> > proposed.  
>> 
>> I can submit my patch for U-Boot some time this week, probably tomorrow. Do you
>> also want me to take care of the Linux side for enabling the MAC delay?
>
>What's the conclusion with this regression?
>If we need a fix in Linux it'd be great to have it before v6.17 is cut.

Sorry I'm on mobile, so I can't use my korg account.

But on the linux side this is fixed by the following patch:
https://lore.kernel.org/all/20250819065622.1019537-1-mwalle@kernel.org/

You can close this in pw (if that's still in a pending state).

Thanks for taking care and sorry I haven't mentioned the follow-up patch here. 

-michael