Re: sunxi_emac: H3 w/ internal PHY breakage

[Kyle Evans <kevans%freebsd.org@localhost>]

On Fri, Feb 15, 2019 at 8:49 PM Kyle Evans <kevans%freebsd.org@localhost> wrote:
>
> Hi,
>
> v1.19 moved the MAC soft reset into sunxi_emac_init_locked. Initially
> experienced on FreeBSD once I ported this change, but I tested NetBSD
> (because I use it on an OrangePi R1) to exhibit the same behavior:
> some link changes and down/up on the interface will somewhat reliably
> break emac0.
>
> I propose the following change (patch against NetBSD at [1]) to revert
> the move and instead assert the ephy reset before de-asserting it
> again in sunxi_emac_setup_resources. U-Boot leaves it asserted upon
> exit, and this is somewhat non-trivial to fix for both non-EFI and EFI
> cases. However, forcing the ephy reset clears up the soft reset
> timeout at boot w/ no link while leaving a stable emac0.
>
> I've committed the same change to FreeBSD and have not yet had any
> issues with it, but further testing would be appreciated.
>
> Thanks,
>
> Kyle Evans
>
> [1] https://people.freebsd.org/~kevans/netbsd-intphy.diff

Hmm... am I the only one to trip over this, then? I can continue
running with the local patch, but I assumed it would have been noticed
by others on OrangePi H3/H2+ as well.