Re: odroid-c1's awge0 on 9?

[Christoph Badura <bad%bsd.de@localhost>]

On Mon, Nov 04, 2019 at 02:05:20AM +0100, Christoph Badura wrote:
> On Sat, Nov 02, 2019 at 12:55:16PM -0700, Jason Thorpe wrote:
> > > On Nov 2, 2019, at 10:42 AM, Christoph Badura <bad%bsd.de@localhost> wrote:
> > > Or maybe fix rgephy and back out the workarounds.  Jarend pointed out that
> > > phy address 0 is a broadcast address on RTL8211[EF].
> > 
> > How is using the DT information to find the PHY a "workaround"?  It
> > certainly seems like it would in fact be preferred.
> 
> Because it doesn't fix the underlying bug.
> 
> In all the cases (Andrew Cagney's odroid-c1, tih's rock64, my bananapi m1)
> we saw rgephy attaching at id 0 and 1:
> 
> rgephy0 at awge0 phy 0: RTL8211F 1000BASE-T media interface
> rgephy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT-FDX, auto
> rgephy1 at awge0 phy 1: RTL8211F 1000BASE-T media interface
> rgephy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT-FDX, auto
> awge0: interrupting on GIC irq 56

Just to make sure I re-tested Nov 4th and I couldn't reproduce the problem
anymore.  Not even moving connecting the bananapi to same switch port and
using LCD/USB keyboard (just in case).  It always got GigE interface
working immediately independend of wether rgephy attached at id 0 or not.
I.e. with a kernel from before the change to sunxi_gmac.c and with a kernel
from after the change.  It was perfectly reproducible before the weekend.

I'm not sure what changed.  The switch didn't reboot or reconfigure in
that timeframe either.

--chris