Re: [PATCH net] net: phy: dp83869: Set auto mdix bit for forced 100Base-Tx mode
From: Andrew Lunn
Date: Thu Feb 12 2026 - 08:06:56 EST
> > What about when you change the configuration out of forced 100 Full?
> > Shouldn't the configuration be returned to how the user wants
> > auto-MDIX configured? Should you disable robust Auto-MDIX so that
> > "unreliable Auto-MDIX" is used?
>
> This bit is only necessary if link partners are configured to operational
> modes that not supported by normal Auto MDI/MDIX mode (when one of that link
> partners are in Forced 100Base-TX), will fix it in v2.
Does this bit have any effect on normal Auto MDI/MDIX mode? Can this
bit be set once during probe, rather than for a specific link mode?
Is there an errata for this behaviour/fix? If there is please
reference the number/document etc.
Since this is a fix, please add a Fixes: tag.
Andrew