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Tue, 19 Aug 2025 19:40:50 -0700 (PDT) Received: from anyang ([106.250.177.234]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-245ed4ec0ddsm10880125ad.114.2025.08.19.19.40.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 19 Aug 2025 19:40:49 -0700 (PDT) Date: Wed, 20 Aug 2025 11:40:44 +0900 From: Dongjin Kim To: Chukun Pan Cc: conor+dt@kernel.org, devicetree@vger.kernel.org, heiko@sntech.de, krzk+dt@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, robh@kernel.org Subject: Re: [PATCH v2] arm64: dts: rockchip: Change ethernet TXD timing delay value Message-ID: References: <20250819075522.2238643-1-tobetter@gmail.com> <20250819151019.877709-1-amadeus@jmu.edu.cn> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250819151019.877709-1-amadeus@jmu.edu.cn> On Tue, Aug 19, 2025 at 11:10:19PM +0800, Chukun Pan wrote: > Hi, > > > Very poor network performance is observed on the ODROID-M1 Board > > (REV 1.0 20220613) when running iperf3 (under 200Mbits/sec), and > > this problem can be resolved after changing the value of TXD > > timing to 0x35 from 0x4f. > > Can you try changing phy-mode to "rgmii-id" ? > > ``` > --- a/arch/arm64/boot/dts/rockchip/rk3568-odroid-m1.dts > +++ b/arch/arm64/boot/dts/rockchip/rk3568-odroid-m1.dts > @@ -200,7 +200,7 @@ &gmac0 { > assigned-clock-rates = <0>, <125000000>; > clock_in_out = "output"; > phy-handle = <&rgmii_phy0>; > - phy-mode = "rgmii"; > + phy-mode = "rgmii-id"; > phy-supply = <&vcc3v3_sys>; > pinctrl-names = "default"; > pinctrl-0 = <&gmac0_miim > @@ -209,9 +209,6 @@ &gmac0_rx_bus2 > &gmac0_rgmii_clk > &gmac0_rgmii_bus>; > status = "okay"; > - > - tx_delay = <0x4f>; > - rx_delay = <0x2d>; > }; > > &gpu { > ``` > > -- > 2.25.1 > > Thank you for suggesting me to try 'rgmii-id' again. I'd remember that 'rgmii-id' didn't work with the very early version of the board, however your suggestion works. Let me test the change with more boards and submit the new patch when it's done. Thanks a lot. Dongjin Kim.