Re: [PATCH] arm64: dts: imx8mp-debix-model-a: Disable EEE for 1000T

["Russell King (Oracle)" <linux@armlinux.org.uk>]

On Mon, Oct 27, 2025 at 12:31:07PM +0200, Laurent Pinchart wrote:
> On Mon, Oct 27, 2025 at 11:23:03AM +0100, Oleksij Rempel wrote:
> > On Mon, Oct 27, 2025 at 12:02:27PM +0200, Laurent Pinchart wrote:
> > > Hi Oleksij,
> > > > Please note, RTL8211E PHY do use undocumented SmartEEE mode by default.
> > > > It ignores RGMII LPI opcodes and doing own thing. It can be confirmed by
> > > > monitoring RGMII TX and MDI lines with oscilloscope and changing
> > > > tx-timer configurations. I also confirmed this information from other
> > > > source. To disable SmartEEE and use plain MAC based mode, NDA documentation
> > > > is needed.
> > > 
> > > That's useful information, thank you. Would you by any chance to know if
> > > such NDA would allow contributing the feature upstream ?
> > 
> > Good question, but the NDA process was actually aborted. We didn't move
> > forward due to a lack of time and ultimately, a lack of commercial
> > interest from any projects or customers for this PHY.
> 
> Fair enough. I've tried :-)
> 
> If we can't disable SmartEEE in the PHY, does it mean we need to somehow
> disable EEE in the MAC, but still program the PHY to advertise EEE to
> the link partner ?

Or maybe the PHY needs to have EEE capability disabled?

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