2019-12-25 00:58:52

by Martin Blumenstingl

Subject: [PATCH 3/3] ARM: dts: meson8m2: mxiii-plus: use the same RGMII TX delay as u-boot

Due to a bug in the MPLL2 clock setup (which is used as input for the
RGMII TX clock) a TX delay of 2ns did not work previously. With a TX
delay of 4ns Ethernet worked enough to get an IP via DHCP but there was
still high packet loss when transmitting data.

Update the TX delay to 2ns - which is the same value that u-boot and the
vendor kernel use - to fix the packet loss when transmitting data.

Fixes: 35ee52bea66c74 ("ARM: dts: meson8m2: add support for the Tronsmart MXIII Plus")
Signed-off-by: Martin Blumenstingl <[email protected]>
---
arch/arm/boot/dts/meson8m2-mxiii-plus.dts | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/meson8m2-mxiii-plus.dts b/arch/arm/boot/dts/meson8m2-mxiii-plus.dts
index d54477b1001c..fd94b5cbd845 100644
--- a/arch/arm/boot/dts/meson8m2-mxiii-plus.dts
+++ b/arch/arm/boot/dts/meson8m2-mxiii-plus.dts
@@ -71,7 +71,7 @@ &ethmac {
phy-handle = <&eth_phy0>;
phy-mode = "rgmii";

- amlogic,tx-delay-ns = <4>;
+ amlogic,tx-delay-ns = <2>;

mdio {
compatible = "snps,dwmac-mdio";
--
2.24.1