linux-kernel - RE: [PATCH v2 net-next] net: phy: micrel: Adding SQI support for lan8814 phy

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Date:   Wed, 7 Sep 2022 09:24:06 +0000
From:   <Divya.Koppera@...rochip.com>
To:     <michael@...le.cc>
CC:     <andrew@...n.ch>, <UNGLinuxDriver@...rochip.com>,
        <davem@...emloft.net>, <edumazet@...gle.com>,
        <hkallweit1@...il.com>, <kuba@...nel.org>,
        <linux-kernel@...r.kernel.org>, <linux@...linux.org.uk>,
        <netdev@...r.kernel.org>, <pabeni@...hat.com>,
        <o.rempel@...gutronix.de>
Subject: RE: [PATCH v2 net-next] net: phy: micrel: Adding SQI support for
 lan8814 phy

Hi Michael,

> -----Original Message-----
> From: Michael Walle <michael@...le.cc>
> Sent: Wednesday, September 7, 2022 2:38 PM
> To: Divya Koppera - I30481 <Divya.Koppera@...rochip.com>
> Cc: andrew@...n.ch; UNGLinuxDriver <UNGLinuxDriver@...rochip.com>;
> davem@...emloft.net; edumazet@...gle.com; hkallweit1@...il.com;
> kuba@...nel.org; linux-kernel@...r.kernel.org; linux@...linux.org.uk;
> netdev@...r.kernel.org; pabeni@...hat.com; Oleksij Rempel
> <o.rempel@...gutronix.de>; Michael Walle <michael@...le.cc>
> Subject: Re: [PATCH v2 net-next] net: phy: micrel: Adding SQI support for
> lan8814 phy
> 
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the
> content is safe
> 
> > On Mon, Sep 05, 2022 at 03:47:30PM +0530, Divya Koppera wrote:
> >> Supports SQI(Signal Quality Index) for lan8814 phy, where it has SQI
> >> index of 0-7 values and this indicator can be used for cable
> >> integrity diagnostic and investigating other noise sources. It is not
> >> supported for 10Mbps speed
> >>
> >> Signed-off-by: Divya Koppera <Divya.Koppera@...rochip.com>
> >> ---
> >> v1 -> v2
> >> - Given SQI support for all pairs of wires in 1000/100 base-T phy's
> >>   uAPI may run through all instances in future. At present returning
> >>   only first instance as uAPI supports for only 1 pair.
> >> - SQI is not supported for 10Mbps speed, handled accordingly.
> >
> > I would prefer you solve the problem of returning all pairs.
> >
> > I'm not sure how useful the current implementation is, especially at
> > 100Mbps, where pair 0 could actually be the transmit pair. Does it
> > give a sensible value in that case?
> 
> It is good practice to CC the patches to the ones who gave feedback on the
> previous versions. Not everyone is subscribed to all the high traffic
> mailinglist.
> 

Sorry I missed adding you. 

> Thanks,
> -michael