RE: [PATCH] net: phy: adin: add signal mean square error registers to phy-stats

["Ardelean, Alexandru" <alexandru.Ardelean@analog.com>]

> -----Original Message-----
> From: Andrew Lunn <andrew@lunn.ch>
> Sent: Thursday, December 3, 2020 4:16 PM
> To: Ardelean, Alexandru <alexandru.Ardelean@analog.com>
> Cc: netdev@vger.kernel.org; linux-kernel@vger.kernel.org;
> hkallweit1@gmail.com; linux@armlinux.org.uk; davem@davemloft.net;
> kuba@kernel.org; Redmond, Catherine <Catherine.Redmond@analog.com>;
> Murray, Brian <Brian.Murray@analog.com>; Baylov, Danail
> <Danail.Baylov@analog.com>; OBrien, Maurice
> <Maurice.OBrien@analog.com>
> Subject: Re: [PATCH] net: phy: adin: add signal mean square error registers to
> phy-stats
> 
> On Thu, Dec 03, 2020 at 10:07:19AM +0200, Alexandru Ardelean wrote:
> > When the link is up on the ADIN1300/ADIN1200, the signal quality on
> > each pair is indicated in the mean square error register for each pair
> > (MSE_A, MSE_B, MSE_C, and MSE_D registers, Address 0x8402 to Address
> > 0x8405, Bits[7:0]).
> >
> > These values can be useful for some industrial applications.
> >
> > This change implements support for these registers using the PHY
> > statistics mechanism.
> 
> There was a discussion about values like these before. If i remember correctly, it
> was for a BroadReach PHY. I thought we decided to add them to the link state
> information?
> 

Oh, this is new.
I've had this MSE patch lying around in a branch since last year sometime.
Wasn't sure whether to put it in the phy-stats.

> Ah, found it.
> 
> commit 68ff5e14759e7ac1aac7bc75ac5b935e390fa2b3
> Author: Oleksij Rempel <linux@rempel-privat.de>
> Date:   Wed May 20 08:29:15 2020 +0200
> 
>     net: phy: tja11xx: add SQI support
> 
> and
> 
> ommit 8066021915924f58ed338bf38208215f5a7355f6
> Author: Oleksij Rempel <linux@rempel-privat.de>
> Date:   Wed May 20 08:29:14 2020 +0200
> 
>     ethtool: provide UAPI for PHY Signal Quality Index (SQI)
> 
> Can you convert your MSE into SQI?

I'll take a look and try to understand the SQI spec.
It's neat that there's a common place where to put this.

Thanks
Alex

> 
>     Andrew