On Fri, May 01, 2020 at 08:27:56AM +0100, Jon Hunter wrote:
The 'phy-mode' property is currently defined as 'rgmii' for Jetson Xavier. This indicates that the RGMII RX and TX delays are set by the MAC and the internal delays set by the PHY are not used.
If the Marvell PHY driver is enabled, such that it is used and not the generic PHY, ethernet failures are seen (DHCP is failing to obtain an IP address) and this is caused because the Marvell PHY driver is disabling the internal RX and TX delays. For Jetson Xavier the internal PHY RX and TX delay should be used and so fix this by setting the 'phy-mode' to 'rgmii-id' and not 'rgmii'.
Cc: stable@vger.kernel.org
Signed-off-by: Jon Hunter jonathanh@nvidia.com
arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
Added a Fixes: tag and applied to for-5.8/arm64/dt, thanks.
Thierry