> > I already explain how this works once. Please read this thread again.... The > > MAC can apply the delays, but it must mask the phy-mode it passes to the PHY. > > Yes. I have read these mails. > > I understand what you mean. > "rgmii": delay on PCB, not MAC or PHY. > "rgmii-id": delay on MAC or PHY, not PCB. > > ftgmac100 driver gets phy driver handle from of_phy_get_and_connect(), it will pass the phy-mode to > phy driver from the node of mac dts. > Therefore, I use "rgmii-id" and the phy will enable tx/rx internal delay. > If I use "rgmii-id" and configure the RGMII delay in ftgmac100 driver, I cannot pass the phy-mode to > phy driver. Quoting myself, yet again: > > MAC can apply the delays, but it must mask the phy-mode it passes to the PHY. If you decide the MAC does the RX clock delay, it needs to mask that from the phy-mode, otherwise the PHY will also do it. If you decide the MAC does the TX clock delay, its needs to mask that from the phy-mode. Andrew
