Re: [PATCH net v3] net: phy: intel-xway: enable integrated led functions
From: Andrew Lunn
Date: Wed Feb 09 2022 - 20:28:37 EST
> The errata can be summarized as:
> - 1 out of 100 boots or cable plug events RGMII GbE link will end up
> going down and up 3 to 4 times then resort to a 100m link; workaround
> has been found to require a pin level reset
So that sounds like it is downshifting because it thinks there is a
broken pair. Can you disable downshift? Problem is, that might just
result in link down.
> - 1 out of 100 boots or cable plug events (varies per board) SGMII
> will fail link between the MAC and PHY; workaround has been found to
> require a pin level reset
I don't suppose there is a register to restart SGMII sync? Sometimes
there is.
Anyway, shared reset makes this messy, as you said. Unfortunate
design. But i don't see how you can work around this in the
bootloader, especially the cable plug events.
Andrew