netdev - Re: [PATCH net-next V4 5/5] net: lan743x: Add support to ethtool phylink get and set settings

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Message-ID: <ZtgY5jYk4C4z3v2R@HYD-DK-UNGSW21.microchip.com>
Date: Wed, 4 Sep 2024 13:53:02 +0530
From: Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>
To: Andrew Lunn <andrew@...n.ch>
CC: Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>, <netdev@...r.kernel.org>,
	<davem@...emloft.net>, <linux@...linux.org.uk>, <kuba@...nel.org>,
	<hkallweit1@...il.com>, <richardcochran@...il.com>, <rdunlap@...radead.org>,
	<Bryan.Whitehead@...rochip.com>, <edumazet@...gle.com>, <pabeni@...hat.com>,
	<linux-kernel@...r.kernel.org>, <horms@...nel.org>,
	<UNGLinuxDriver@...rochip.com>
Subject: Re: [PATCH net-next V4 5/5] net: lan743x: Add support to ethtool
 phylink get and set settings

Hi Andrew,

Thank you for review the patches.

The 08/30/2024 22:55, Andrew Lunn wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> > @@ -3055,6 +3071,10 @@ static void lan743x_phylink_mac_link_up(struct phylink_config *config,
> >                                         cap & FLOW_CTRL_TX,
> >                                         cap & FLOW_CTRL_RX);
> >
> > +     if (phydev)
> > +             lan743x_mac_eee_enable(adapter, phydev->enable_tx_lpi &&
> > +                                    phydev->eee_enabled);
> 
> This is wrong. The documentation says:
> 
> /**
>  * phy_support_eee - Set initial EEE policy configuration
>  * @phydev: Target phy_device struct
>  *
>  * This function configures the initial policy for Energy Efficient Ethernet
>  * (EEE) on the specified PHY device, influencing that EEE capabilities are
>  * advertised before the link is established. It should be called during PHY
>  * registration by the MAC driver and/or the PHY driver (for SmartEEE PHYs)
>  * if MAC supports LPI or PHY is capable to compensate missing LPI functionality
>  * of the MAC.
>  *
>  * The function sets default EEE policy parameters, including preparing the PHY
>  * to advertise EEE capabilities based on hardware support.
>  *
>  * It also sets the expected configuration for Low Power Idle (LPI) in the MAC
>  * driver. If the PHY framework determines that both local and remote
>  * advertisements support EEE, and the negotiated link mode is compatible with
>  * EEE, it will set enable_tx_lpi = true. The MAC driver is expected to act on
>  * this setting by enabling the LPI timer if enable_tx_lpi is set.
>  */
> 
> So you should only be looking at enable_tx_lpi.

Ok. I will fix.

> 
> Also, do you actually call phy_support_eee() anywhere? I don't see it
> in this patch, but maybe it was already there?

We never call phy_support_eee() anywhere.
I will fix

> 
>         Adrew

-- 
Thanks,                                                                         
Raju