On disco and eval board, Tx and Rx delay are applied (pull-up of 4.7k put on VDD) so which correspond to RGMII-ID mode with internal RX and TX delays provided by the PHY, the MAC should not add the RX or TX delays in this case Christophe Roullier (1): ARM: dts: stm32: replace rgmii mode with rgmii-id on stm32mp15 boards arch/arm/boot/dts/stm32mp157a-dk1.dts | 2 +- arch/arm/boot/dts/stm32mp157c-ev1.dts | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) -- 2.17.1