netdev - Re: [PATCH net-next v1 7/7] net: usb: lan78xx: Enable EEE support with phylink integration

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Message-ID: <Z4t8bTNQAy5wMipw@pengutronix.de>
Date: Sat, 18 Jan 2025 11:03:25 +0100
From: Oleksij Rempel <o.rempel@...gutronix.de>
To: "Russell King (Oracle)" <linux@...linux.org.uk>
Cc: Andrew Lunn <andrew@...n.ch>, "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Woojung Huh <woojung.huh@...rochip.com>,
	Andrew Lunn <andrew+netdev@...n.ch>, kernel@...gutronix.de,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	UNGLinuxDriver@...rochip.com, Phil Elwell <phil@...pberrypi.org>
Subject: Re: [PATCH net-next v1 7/7] net: usb: lan78xx: Enable EEE support
 with phylink integration

On Sat, Jan 18, 2025 at 08:22:15AM +0100, Oleksij Rempel wrote:
> On Fri, Jan 17, 2025 at 04:23:52PM +0000, Russell King (Oracle) wrote:
> > qca8k_set_mac_eee() sets the LPI enabled based off eee->eee_enabled.
> > It doesn't seem to change the register on link up/down, so I wonder
> > how the autoneg resolution is handled. Maybe it isn't, so maybe it's
> > buggy.
> 
> The QCA8K_REG_EEE_CTRL_LPI_EN() bit is supported only for ports with
> integrated PHYs. There seems to be no validation for this case.


> Other problem with the code, lpi_en bit can be removed only one time.
> Executing tx_lpi off and tx_lpi on in a sequence will not work.

Please ignore this lat part, I'm wrong here.

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