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Message-ID: <YaZONv7fmRWK+qCb@shell.armlinux.org.uk>
Date: Tue, 30 Nov 2021 16:15:50 +0000
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Marek BehĂșn <kabel@...nel.org>
Cc: netdev@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
Jakub Kicinski <kuba@...nel.org>, davem@...emloft.net
Subject: Re: [PATCH net 6/6] net: dsa: mv88e6xxx: Link in pcs_get_state() if
AN is bypassed
On Tue, Nov 30, 2021 at 05:09:11PM +0100, Marek BehĂșn wrote:
> Seems that BMSR_ANEGCAPABLE is set even if AN is disabled in BMCR.
Hmm, that behaviour goes against 22.2.4.2.10:
A PHY shall return a value of zero in bit 1.5 if Auto-Negotiation is
disabled by clearing bit 0.12. A PHY shall also return a value of zero
in bit 1.5 if it lacks the ability to perform Auto-Negotiation.
> I was under the impression that
> state->an_complete
> should only be set to true if AN is enabled.
Yes - however as you've stated, the PHY doesn't follow 802.3 behaviour
so I guess we should make the emulation appear compliant by fixing it
like this.
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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