linux-kernel - Re: [PATCH RFC net-next] net: phylink: always config mac for (delayed) phy

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Message-ID: <aD1lRha-enQ9Pw0g@shell.armlinux.org.uk>
Date: Mon, 2 Jun 2025 09:48:06 +0100
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Ilya K <me@...ti.me>
Cc: Eric Woudstra <ericwouds@...il.com>, Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Frank Wunderlich <frank-w@...lic-files.de>,
	Daniel Golle <daniel@...rotopia.org>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, netfilter-devel@...r.kernel.org,
	coreteam@...filter.org, bridge@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH RFC net-next] net: phylink: always config mac for
 (delayed) phy

On Mon, Jun 02, 2025 at 10:19:22AM +0300, Ilya K wrote:
> On 2025-01-09 12:15, Russell King (Oracle) wrote:
> > On Thu, Jan 09, 2025 at 09:56:17AM +0100, Eric Woudstra wrote:
> > I'll look at what we can do for this today.
> Hey folks, don't really want to necrobump this, but the original hack patch is the only way I can get my weirdo Realtek (noticing a pattern here) GPON modem-on-a-stick to probe at 2500base-x on a BPi-R4. I've actually tracked down the issue myself and wrote basically the same patch first :( Is there anything I can do (with my extremely limited phylink understanding) to help move this forward so other people don't have to suffer like I did?

There were two issues that were identified. The first was that when in
2500Base-X mode, the PCS wasn't reporting link-up. That was addressed
by the patch series:

Z4TbR93B-X8A8iHe@...ll.armlinux.org.uk

then, the replacement for Eric's patch was:

E1tYhxp-001FHf-Ac@...-PC.armlinux.org.uk

So the problem should be solved with these applied, as when the PHY is
attached, "changed" will always be true, which is in effect what Eric's
patch was doing, but in a cleaner way.

Please confirm that you have all six patches applied.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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