Re: i.MX6S/DL and QCA8334 switch using DSA driver - CPU port not working
From: Andrew Lunn <andrew@lunn.ch>
Date: 2018-05-04 13:30:16
Some RGMII delay tunning attempts with v4.17-rc2: phy-mode (fec) Rx/Tx delay result -------------------------------------- rgmii 0/0 NOT OK rgmii 1/1 NOT OK rgmii 2/2 NOT OK rgmii 3/3 NOT OK rgmii-id 0/0 NOT OK rgmii-id 1/1 NOT OK rgmii-id 2/2 NOT OK rgmii-id 3/3 NOT OK I am out of ideas how to further debug this. Any additional adivce will be much appreciated.
I would suggest looking at the statistics counters. ethtool -S. Try
it for both the slave interfaces, and the master interface. The master
interfaces statistics should have both the host counters, and the
switches counters. Do you see packets being sent but not received? Are
there errors reported?
Andrew