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(p200300EA8F366800349617D51B2BBEE1.dip0.t-ipconnect.de. [2003:ea:8f36:6800:3496:17d5:1b2b:bee1]) by smtp.googlemail.com with ESMTPSA id e6sm22981852wru.44.2020.01.27.11.28.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 27 Jan 2020 11:28:31 -0800 (PST) Subject: Re: [RFC net-next 6/8] net: phylink: Configure MAC/PCS when link is up without PHY To: Andrew Lunn , Russell King - ARM Linux admin Cc: Jose Abreu , Joao Pinto , Alexandre Torgue , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-stm32@st-md-mailman.stormreply.com" , Florian Fainelli , Maxime Coquelin , Jakub Kicinski , Giuseppe Cavallaro , "David S. Miller" , "linux-arm-kernel@lists.infradead.org" References: <9a2136885d9a892ff170be88fdffeda82c778a10.1580122909.git.Jose.Abreu@synopsys.com> <20200127112102.GT25745@shell.armlinux.org.uk> <20200127114600.GU25745@shell.armlinux.org.uk> <20200127140038.GD13647@lunn.ch> <20200127140834.GW25745@shell.armlinux.org.uk> <20200127145107.GE13647@lunn.ch> <20200127161132.GX25745@shell.armlinux.org.uk> <20200127162206.GJ13647@lunn.ch> From: Heiner Kallweit Message-ID: Date: Mon, 27 Jan 2020 20:28:21 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: <20200127162206.GJ13647@lunn.ch> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 27.01.2020 17:22, Andrew Lunn wrote: >>> Heiner has another device which has an Aquantia PHY running in an odd >>> mode so that it does 1G over a T2 link. It uses SGMII for this, and >>> that is where we first noticed the issue of the MAC and PCS having >>> different configurations. >> >> Do you know when the issue appeared? > > As far as i understand, it never worked, it is not a regression as > such. But Heiner probably knows more. > I think you're referring to the issue that was fixed with following commit: 72d8b4fdbfb6 ("net: dsa: mv88e6xxx: support in-band signalling on SGMII ports with external PHYs"). The commit description also has a link to the discussion we had about the issue. If I read it correctly the issue is independent of this proprietary 1000BaseT2 mode having been used. > Andrew > . > Heiner