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 11:33:46AM +0200, Laurent Pinchart wrote:
> Hi Russell,
> 
> On Mon, Oct 27, 2025 at 09:07:32AM +0000, Russell King (Oracle) wrote:
> > On Sun, Oct 26, 2025 at 02:29:04PM +0200, Laurent Pinchart wrote:
> > > Energy Efficient Ethernet (EEE) is broken at least for 1000T on the EQOS
> > > (DWMAC) interface. When connected to an EEE-enabled peer, the ethernet
> > > devices produces an interrupts storm. Disable EEE support to fix it.
> > 
> > As this is the second problem that has been reported recently, please
> > bisect the conversion of stmmac to phylink managed EEE support and see
> > whether there is anything in that which is causing this.
> 
> Emanuele Ghidoli has bisected this to commit 2c81f3357136 ("net: stmmac:
> convert to phylink PCS support"), as reported in [1]. I can test that
> commit and the commit just before tonight.
> 
> [1] https://lore.kernel.org/all/341f56de-9dde-4c44-9542-b523e1917dcb@gmail.com/

As you will notice in that thread, I have responded to it last week, so
I am well aware of it. I am also well aware of the claims Emanuele made
in his commit description are demonstrably false.

That's not to say the commit isn't a problem, but the explanation of
why it's a problem doesn't make sense right now, and thus what needs to
be done to fix it is unknown.

I don't think going around disabling EEE on individual platforms is the
right approach.

-- 
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