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From: Dongjin Kim <tobetter@gmail.com>
To: Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Heiko Stuebner <heiko@sntech.de>
Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2] arm64: dts: rockchip: Change ethernet TXD timing delay value
Date: Tue, 19 Aug 2025 16:55:21 +0900	[thread overview]
Message-ID: <20250819075522.2238643-1-tobetter@gmail.com> (raw)

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.

Signed-off-by: Dongjin Kim <tobetter@gmail.com>
---
 arch/arm64/boot/dts/rockchip/rk3568-odroid-m1.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3568-odroid-m1.dts b/arch/arm64/boot/dts/rockchip/rk3568-odroid-m1.dts
index 0f844806ec542..e1a550a04498e 100644
--- a/arch/arm64/boot/dts/rockchip/rk3568-odroid-m1.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3568-odroid-m1.dts
@@ -210,7 +210,7 @@ &gmac0_rgmii_clk
 		     &gmac0_rgmii_bus>;
 	status = "okay";
 
-	tx_delay = <0x4f>;
+	tx_delay = <0x35>;
 	rx_delay = <0x2d>;
 };
 
-- 
2.34.1



WARNING: multiple messages have this Message-ID (diff)
From: Dongjin Kim <tobetter@gmail.com>
To: Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Heiko Stuebner <heiko@sntech.de>
Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2] arm64: dts: rockchip: Change ethernet TXD timing delay value
Date: Tue, 19 Aug 2025 16:55:21 +0900	[thread overview]
Message-ID: <20250819075522.2238643-1-tobetter@gmail.com> (raw)

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.

Signed-off-by: Dongjin Kim <tobetter@gmail.com>
---
 arch/arm64/boot/dts/rockchip/rk3568-odroid-m1.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3568-odroid-m1.dts b/arch/arm64/boot/dts/rockchip/rk3568-odroid-m1.dts
index 0f844806ec542..e1a550a04498e 100644
--- a/arch/arm64/boot/dts/rockchip/rk3568-odroid-m1.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3568-odroid-m1.dts
@@ -210,7 +210,7 @@ &gmac0_rgmii_clk
 		     &gmac0_rgmii_bus>;
 	status = "okay";
 
-	tx_delay = <0x4f>;
+	tx_delay = <0x35>;
 	rx_delay = <0x2d>;
 };
 
-- 
2.34.1


_______________________________________________
Linux-rockchip mailing list
Linux-rockchip@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-rockchip

             reply	other threads:[~2025-08-19  8:37 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-08-19  7:55 Dongjin Kim [this message]
2025-08-19  7:55 ` [PATCH v2] arm64: dts: rockchip: Change ethernet TXD timing delay value Dongjin Kim
2025-08-19 15:10 ` Chukun Pan
2025-08-19 15:10   ` Chukun Pan
2025-08-20  2:40   ` Dongjin Kim
2025-08-20  2:40     ` Dongjin Kim

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