linux-kernel - Re: [PATCH] arm64: dts: ti: k3-*: Replace rgmii-rxid with rgmii-id for CPSW ports

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Message-ID: <20260112180637.GR3416603@bill-the-cat>
Date: Mon, 12 Jan 2026 12:06:37 -0600
From: Tom Rini <trini@...sulko.com>
To: Francesco Dolcini <francesco@...cini.it>
Cc: Siddharth Vadapalli <s-vadapalli@...com>, u-boot@...ts.denx.de,
	nm@...com, vigneshr@...com, kristo@...nel.org, robh@...nel.org,
	krzk+dt@...nel.org, conor+dt@...nel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	srk@...com
Subject: Re: [PATCH] arm64: dts: ti: k3-*: Replace rgmii-rxid with rgmii-id
 for CPSW ports

On Mon, Jan 12, 2026 at 08:56:36AM +0100, Francesco Dolcini wrote:
> On Mon, Jan 12, 2026 at 08:49:56AM +0100, Francesco Dolcini wrote:
> > +Tom +U-Boot ML
> > 
> > Hello Siddharth,
> > 
> > On Sat, Oct 25, 2025 at 01:07:59PM +0530, Siddharth Vadapalli wrote:
> > > The MAC Ports across all of the CPSW instances (CPSW2G, CPSW3G, CPSW5G and
> > > CPSW9G) present in various K3 SoCs only support the 'RGMII-ID' mode. This
> > > correction has been implemented/enforced by the updates to:
> > > a) Device-Tree binding for CPSW [0]
> > > b) Driver for CPSW [1]
> > > c) Driver for CPSW MAC Port's GMII [2]
> > > 
> > > To complete the transition from 'RGMII-RXID' to 'RGMII-ID', update the
> > > 'phy-mode' property for all CPSW ports by replacing 'rgmii-rxid' with
> > > 'rgmii-id'.
> > > 
> > > [0]: commit 9b357ea52523 ("dt-bindings: net: ti: k3-am654-cpsw-nuss: update phy-mode in example")
> > > [1]: commit ca13b249f291 ("net: ethernet: ti: am65-cpsw: fixup PHY mode for fixed RGMII TX delay")
> > > [2]: commit a22d3b0d49d4 ("phy: ti: gmii-sel: Always write the RGMII ID setting")
> > 
> > What about U-Boot?
> > I just noticed this in today U-Boot master:
> > 
> >   RGMII mode without internal TX delay unsupported; please fix your Device Tree
> > 
> > and I think this is coming from the DTS update from Linux to U-Boot.
> > 
> > Can you look into that?
> 
> Ok, I think that the issue is that the U-Boot code was updated
> correctly, but now we need the v6.19 DT in U-Boot, and as of now we have
> 6.18 DT.
> 
> Tom: are you planning to sync the U-Boot DT to Linux v6.19 before the next
> U-Boot release?

Once it's out, yes. But, uh, this tells me some TI folks forgot to
backport all of the dts changes too then as we shouldn't have broken
platforms in-tree like this.

-- 
Tom

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