linux-kernel - Re: [PATCH v8 2/3] net: phy: Add helper for fixing RGMII PHY mode based on internal mac delay

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Message-ID: <aRbzKI3NpXPv-JpK@horms.kernel.org>
Date: Fri, 14 Nov 2025 09:15:20 +0000
From: Simon Horman <horms@...nel.org>
To: Inochi Amaoto <inochiama@...il.com>
Cc: Han Gao <rabenda.cn@...il.com>, Icenowy Zheng <uwu@...nowy.me>,
	Vivian Wang <wangruikang@...as.ac.cn>, Yao Zi <ziyao@...root.org>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Chen Wang <unicorn_wang@...look.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	"Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
	netdev@...r.kernel.org, devicetree@...r.kernel.org,
	sophgo@...ts.linux.dev, linux-kernel@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org, Yixun Lan <dlan@...too.org>,
	Longbin Li <looong.bin@...il.com>,
	Maxime Chevallier <maxime.chevallier@...tlin.com>
Subject: Re: [PATCH v8 2/3] net: phy: Add helper for fixing RGMII PHY mode
 based on internal mac delay

On Fri, Nov 14, 2025 at 08:38:04AM +0800, Inochi Amaoto wrote:
> The "phy-mode" property of devicetree indicates whether the PCB has
> delay now, which means the mac needs to modify the PHY mode based
> on whether there is an internal delay in the mac.
> 
> This modification is similar for many ethernet drivers. To simplify
> code, define the helper phy_fix_phy_mode_for_mac_delays(speed, mac_txid,
> mac_rxid) to fix PHY mode based on whether mac adds internal delay.
> 
> Suggested-by: Russell King (Oracle) <linux@...linux.org.uk>
> Signed-off-by: Inochi Amaoto <inochiama@...il.com>
> Reviewed-by: Maxime Chevallier <maxime.chevallier@...tlin.com>

Reviewed-by: Simon Horman <horms@...nel.org>