Dual orin communicate by rgmii fixed-link, orin don't transmit data, txd0~3 signal always low

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Orin
1

I use R35.3.1, I connect two orin by rgmii fixed-link, after configurating pinmux according to jetson orin developer guide, and add ethernet@2310000 in tegra234-ethernet-3737-0000.dtsi as below:

ethernet@2310000 {
	status = "okay";
	nvidia,mac-addr-idx = <1>;
	nvidia,max-platform-mtu = <9000>;
	nvidia,pause_frames = <1>;
	phy-mode = "rgmii";

	nvidia,if-name = "eth_eqos";

	fixed-link {
		speed = <100>;
		full-duplex;
	};
};

now, two orin can link up through ethtool eth_eqos, but ping don’t work, I check the td0~3’s signal waveshape, always low, it indicates no tx data send out
for checking hardware, I use busybox to config td0~3 pin as gpio, those pins’ voltage level can be changed, hardware is normal. the tx_clk and rx_clk’s waveshare is normal, the clock is 25MHz

3

There is no update from you for a period, assuming this is not an issue any more.
Hence we are closing this topic. If need further support, please open a new one.
Thanks

What PHY is in use here?