Why does the Ethernet link fail to come up during the U‑Boot stage after reboot on the Agilex® 5 FPGA 013B Dev Kit GSRD HPS?

Description

Due to an issue in the Quartus® Prime Pro Edition software version 25.3.1 GSRD release for the Agilex® 5 FPGA 013B Development Kit, the Ethernet link may fail to initialize during the U‑Boot stage after a reboot. When the dhcp command is executed, the Ethernet connection does not come up successfully and the following error message is displayed:

Resolution

This problem is scheduled to be resolved in a future release of the Quartus® Prime Pro Edition Software. 

Additional Information

This issue occurs only when a reboot is performed after a successful power‑on. During the initial power‑on boot, the problem does not occur because the operating system uses a generic Ethernet driver.

The issue arises because the Micrel PHY driver is not enabled by default in the U‑Boot configuration, causing the Ethernet link to fail during subsequent boot cycles.