Re: [PATCH v2] arm64: dts: rockchip: Change ethernet TXD timing delay value
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From: Chukun Pan <hidden>
Date: 2025-08-19 15:10:26
Also in:
linux-devicetree, linux-rockchip, lkml
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