On Mon, Jan 18, 2021 at 06:31:19PM +0100, Tobias Waldekranz wrote:
> On Sun, Jul 19, 2020 at 14:43, Chris Healy <[email protected]> wrote:
> > On Sat, Jul 18, 2020 at 8:22 AM Marek Behun <[email protected]> wrote:
> >>
> >> On Sat, 18 Jul 2020 17:05:14 +0200
> >> Andrew Lunn <[email protected]> wrote:
> >>
> >> > > If the traces were broken between the fiber module and the SERDES, I
> >> > > should not see these counters incrementing.
> >> >
> >> > Plus it is reproducible on multiple boards, of different designs.
> >> >
> >> > This is somehow specific to the 6390X ports 9 and 10.
> >> >
> >> > Andrew
> >>
> >> Hmm.
> >>
> >> What about the errata setup?
> >> It says:
> >> /* The 6390 copper ports have an errata which require poking magic
> >> * values into undocumented hidden registers and then performing a
> >> * software reset.
> >> */
> >> But then the port_hidden_write function is called for every port in the
> >> function mv88e6390_setup_errata, not just for copper ports. Maybe Chris
> >> should try to not write this hidden register for SerDes ports.
> >
> > I just disabled the mv88e6390_setup_errata all together and this did
> > not result in any different behaviour on this broken fiber port.
>
> Hi Chris,
>
> Did you manage to track this down?
>
> I am seeing the exact same issue. I have tried both a 1000base-x SFP and
> a copper 1000base-T and get the same result on both - transmit is fine
> but rx only works up to the SERDES, no rx MAC counters are moving.
Hi Tobias
We never tracked this down. I spent many hours bashing my head against
this. I could not bisect it, which did not help.
FYI: Chris has moved onto a new job, and is unlikely to be involved
with Marvell switches any more.
Andrew
