From mboxrd@z Thu Jan 1 00:00:00 1970 From: Russell King - ARM Linux admin Subject: Re: [PATCH net-next] net: phy: improve handling link_change_notify callback Date: Tue, 12 Mar 2019 23:19:18 +0000 Message-ID: <20190312231918.csaemkfjx53yxlrh@shell.armlinux.org.uk> References: <411b1c33-a245-0706-8afd-c4bea1b90f68@gmail.com> <20190304.113025.1437399524067140375.davem@davemloft.net> <20190304200630.GJ26378@lunn.ch> <3079158.ITs3Wk0qno@phil> <945fb25c-c854-27f3-1e98-18a5c981d59f@zonque.org> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Return-path: Content-Disposition: inline In-Reply-To: <945fb25c-c854-27f3-1e98-18a5c981d59f@zonque.org> Sender: netdev-owner@vger.kernel.org To: Daniel Mack Cc: Heiko Stuebner , Andrew Lunn , david.wu@rock-chips.com, f.fainelli@gmail.com, netdev@vger.kernel.org, linux-rockchip@lists.infradead.org, David Miller , linux-arm-kernel@lists.infradead.org, hkallweit1@gmail.com List-Id: linux-rockchip.vger.kernel.org On Tue, Mar 12, 2019 at 06:50:59PM +0100, Daniel Mack wrote: > On 12/3/2019 1:27 PM, Heiko Stuebner wrote: > > Hi Andrew, Heiner, > > > > Am Montag, 4. März 2019, 21:06:30 CET schrieb Andrew Lunn: > >> On Mon, Mar 04, 2019 at 11:30:25AM -0800, David Miller wrote: > >>> From: Heiner Kallweit > >>> Date: Sun, 3 Mar 2019 19:58:57 +0100 > >>> > >>>> Currently the Phy driver's link_change_notify callback is called > >>>> whenever the state machine is run (every second if polling), no matter > >>>> whether the state changed or not. This isn't needed and may confuse > >>>> users considering the name of the callback. Therefore let's change > >>>> the behavior and call this callback only in case of an actual > >>>> state change. > >>>> > >>>> This requires changes to the at803x and rockchip drivers. > >>>> at803x can be simplified so that it reacts on a state change to > >>>> PHY_NOLINK only. > >>>> The rockchip driver can also be much simplified. We simply re-init > >>>> the AFE/DSP registers whenever we change to PHY_RUNNING and speed > >>>> is 100Mbps. This causes very small overhead because we do this even > >>>> if the speed was 100Mbps already. But this is neglectable and > >>>> I think justified by the much simpler code. > >>>> > >>>> Changes are compile-tested only. > >>>> > >>>> Signed-off-by: Heiner Kallweit > >>> > >>> Someone please review this. > >> > >> Hi David > >> > >> We should probably wait for a Tested-by: from Daniel Mack > >> and David Wu , or > >> equivalent. > > > > We should probably add them to the list of recipients if we want > > tests from them, which I've done now. > > > > @David: patch in question that changes the Rockchip eth-phy is > > https://patchwork.kernel.org/patch/10837217/ > > > > Sadly I don't have matching hardware to test this myself. > > Thanks for considering me, but I don't have access to that hardware > either right now. > > The changes look straight forward to me however, so just go ahead an > apply this. Once I get back to that setup, I'll report in case of a > regression. SolidRun Hummingboards and Cubox-i use AR8035 with the FEC driver, so would be ideal to test - unfortunately I'm up to my eyeballs trying to diagnose Armada 8040 comphy issues so can't test at the moment. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up According to speedtest.net: 11.9Mbps down 500kbps up