netdev - Re: [PATCH net-next v6 5/5] net: phy: add driver for built-in 2.5G ethernet PHY on MT7988

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Date: Thu, 13 Jun 2024 15:33:50 +0200
From: Andrew Lunn <andrew@...n.ch>
To: SkyLake Huang (黃啟澤) <SkyLake.Huang@...iatek.com>
Cc: "daniel@...rotopia.org" <daniel@...rotopia.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>,
	"linux@...linux.org.uk" <linux@...linux.org.uk>,
	"kuba@...nel.org" <kuba@...nel.org>,
	"pabeni@...hat.com" <pabeni@...hat.com>,
	"edumazet@...gle.com" <edumazet@...gle.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"dqfext@...il.com" <dqfext@...il.com>,
	Steven Liu (劉人豪) <steven.liu@...iatek.com>,
	"matthias.bgg@...il.com" <matthias.bgg@...il.com>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"hkallweit1@...il.com" <hkallweit1@...il.com>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
	"angelogioacchino.delregno@...labora.com" <angelogioacchino.delregno@...labora.com>
Subject: Re: [PATCH net-next v6 5/5] net: phy: add driver for built-in 2.5G
 ethernet PHY on MT7988

> Since I found out that there's phy-mode="gmii" in mt7981-rfb.dts on
> openWRT, I thought maybe we need gmii&internal for mt7981's built-in
> GbE and xgmii&internal for mt7988's built-in 2.5GbE.

Just because openwrt is using it, does not mean it is correct. We do
not break in tree DT files, but out of tree DT can be ignored.
Hopefully if mt7981-rfb.dts is ever submitted for mainline, the
problem will be fixed. And when OpenWRT updates to a newer kernel they
are likely to fix it.

    Andrew