Why are the HPS GMII to RGMII Adapter FPGA IP outputs always stuck to 0 on Agilex™ 5 designs? - Why are the HPS GMII to RGMII Adapter FPGA IP outputs always stuck to 0 on Agilex™ 5 designs? Description Due to a problem in the Quartus® Prime Pro Edition Software version 24.1, the HPS GMII to RGMII Adapter FPGA IP is not functioning for designs targeting Agilex™ 5. You may observe HPS GMII to RGMII Adapter FPGA IP outputs are always stuck to 0 and/or PHY is not receiving any packet from FPGA IO. This problem occurs when HPS XGMAC is routed to FPGA IO using the HPS GMII to RGMII Adapter FPGA IP. Resolution A patch is available to fix this problem for the Quartus® Prime Pro Edition Software version 24.1. Download and install Patch 0.19 from the following links: Quartus™ Prime Pro Edition Software v24.1 Patch 0.19 for Windows (.exe) Quartus™ Prime Pro Edition Software v24.1 Patch 0.19 for Linux (.run) Readme for Quartus™ Prime Pro Edition Software v24.1 Patch 0.19 (.txt) The patches will enable HPS GMII to RGMII Adapter FPGA IP to perform basic network transmission at 10Mbps/100Mbps link rate. 1Gbps speed is not supported in this patch. Additionally, for Linux OS, you must modify the Linux Device Tree description in <linux-socfpga folder>/arch/arm64/boot/dts/intel/socfpga_agilex5_socdk.dts> to specify mac-mode as “gmii” for the EMAC instance being used with the FPGA IO pins. In the example below, the HPS gmac1 is selected for routing to FPGA IO: &gmac1 { status = "okay"; phy-mode = "rgmii-id"; mac-mode = "gmii"; phy-handle = <&emac1_phy0>; max-frame-size = <9000>; mdio0 { #address-cells = <1>; #size-cells = <0>; compatible = "snps,dwmac-mdio"; emac1_phy0: ethernet-phy@0 { reg = <0>; }; }; }; This problem is scheduled to be fix in a future release of the Quartus® Prime Pro Edition Software. Additional Information Embedded Peripherals IP User Guide Updated for Quartus® Prime Design Suite: 24.1 Publication Content ID: 683130 Chapter: HPS GMII to RGMII Adapter Intel FPGA IP Custom Fields values: ['novalue'] Troubleshooting 15013607416, 16022795823 True ['HPS GMII to RGMII Converter IP'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 24.2 24.1 ['Agilex™ 5 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']