I am building custom Linux image for Avenger96 board with Buildroot using 5.13 kernel. According to the kernel logs, ethernet adapter is recognized and auto-negotiated 1Gbps speed. However, communication does not work (can not obtain DHCP lease, static IP does not work either). After reducing the speed to 100Mbps using ethtool, everything starts working as expected.
On the page 4 of this document: DOC_Getting-Started-588-100 (96boards.org) the following is stated:
Ethernet is currently limited to 100 Mbit/s. Note: With image version v1.1, ethernet can be used in Gbit mode.
My question is - does somebody know what exactly has being made in v.1.1 to support Gbit mode?