From: Andrew Lunn <andrew@lunn.ch>
To: Lucas Tanure <tanure@linux.com>
Cc: xianwei.zhao@amlogic.com, Andrew Lunn <andrew+netdev@lunn.ch>,
davem@davemloft.net, Eric Dumazet <edumazet@kernel.org>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Neil Armstrong <neil.armstrong@linaro.org>,
Kevin Hilman <khilman@baylibre.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
Maxime Chevallier <maxime.chevallier@bootlin.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@foss.st.com>,
netdev@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 4/7] net: stmmac: dwmac-meson8b: follow the generic RGMII delay rules on the T7
Date: Thu, 5 Nov 2026 16:47:12 +0100 [thread overview]
Message-ID: <f0925b45-26b2-4d79-9da7-e73a7a852efa@lunn.ch> (raw)
In-Reply-To: <20261103163715.385394-5-tanure@linux.com>
On Tue, Nov 03, 2026 at 04:37:12PM +0000, Lucas Tanure wrote:
> The delay code reads phy-mode as the list of delays this glue has to
> add, falls back to a 2ns transmit delay when no property asks for one,
> and takes the vendor delay properties. ethernet-controller.yaml says
> the opposite: the PHY adds the 2ns delays, and the MAC properties only
> hold small fine tuning added on top. Every board in the tree depends on
> the old reading, so it stays as it is.
>
> No T7 board uses this glue yet, so the T7 gets a path of its own that
> follows the generic rules: the receive delay line is fine tuning in
> 200ps steps, and the transmit side, a quarter-period phase step, offers
> none, so the transmit property is refused.
>
> Assisted-by: LLM
> Signed-off-by: Lucas Tanure <tanure@linux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Andrew
next prev parent reply other threads:[~2026-11-05 15:47 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-03 16:37 [PATCH v5 0/7] Add ethernet support for the Amlogic T7 Lucas Tanure
2026-11-03 16:37 ` [PATCH v5 1/7] dt-bindings: net: amlogic,meson-dwmac: list the compatible combinations Lucas Tanure
2026-11-03 16:37 ` [PATCH v5 2/7] dt-bindings: net: amlogic,meson-dwmac: add amlogic,t7-dwmac Lucas Tanure
2026-11-05 11:57 ` Krzysztof Kozlowski
2026-11-05 11:58 ` Krzysztof Kozlowski
2026-11-03 16:37 ` [PATCH v5 3/7] net: stmmac: dwmac-meson8b: add support for the Amlogic T7 Lucas Tanure
2026-11-03 16:37 ` [PATCH v5 4/7] net: stmmac: dwmac-meson8b: follow the generic RGMII delay rules on the T7 Lucas Tanure
2026-11-05 15:47 ` Andrew Lunn [this message]
2026-11-03 16:37 ` [PATCH v5 5/7] arm64: dts: amlogic: t7: add the ethernet pinctrl nodes Lucas Tanure
2026-11-03 16:37 ` [PATCH v5 6/7] arm64: dts: amlogic: t7: add the ethernet controller Lucas Tanure
2026-11-03 16:37 ` [PATCH v5 7/7] arm64: dts: amlogic: t7: khadas-vim4: enable the ethernet port Lucas Tanure
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