On Tue, Feb 20, 2024 at 05:52:36PM -0500, Sean Anderson wrote: > With SGMII and XFI, the PCS sits on the MAC's MDIO bus. So for SGMII and > XFI if we don't have any labels we can just assume the PCS handle is for > the right PCS. But for QSGMII the PCSs sit on another MAC's MDIO bus. So > we need to tell the MAC where to find the PCS. This means we need to > supply multiple PCSs to the MAC So how did the other Layerscape devices with the same SerDes, PCS and mEMAC manage to get by and support QSGMII without listing all possible PCSes in pcs-handle-names? :-/ DPAA2 has the exact same situation with the QSGMII PCS situated on the internal bus of another DPMAC. It is unnecessary and buggy complexity, and it will only have to become worse when I add support for C73 backplane autoneg in lynx-pcs and the fman_memac driver, because I will need yet another PCS handle, this time not even one that represents a phy-mode in particular, but a PCS handle for C73 (with C73, the autoneg process determines the dynamic phy-mode).
