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Message-ID: <20231221175857.6d2874ff@device-28.home>
Date: Thu, 21 Dec 2023 17:58:57 +0100
From: Maxime Chevallier <maxime.chevallier@...tlin.com>
To: Andrew Halaney <ahalaney@...hat.com>
Cc: Sneh Shah <quic_snehshah@...cinc.com>, kernel@...cinc.com,
linux-kernel@...r.kernel.org, Bhupesh Sharma <bhupesh.sharma@...aro.org>,
netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com, Eric
Dumazet <edumazet@...gle.com>, Vinod Koul <vkoul@...nel.org>, Jose Abreu
<joabreu@...opsys.com>, Maxime Coquelin <mcoquelin.stm32@...il.com>,
linux-arm-msm@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>, Paolo
Abeni <pabeni@...hat.com>, "David S. Miller" <davem@...emloft.net>,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [Linux-stm32] [PATCH net-next] net: stmmac: dwmac-qcom-ethqos:
Add support for 2.5G SGMII
Hello Andrew,
On Thu, 21 Dec 2023 08:30:49 -0600
Andrew Halaney <ahalaney@...hat.com> wrote:
[...]
>
> Note, I'm struggling to keep up with the standards at play here, so if
> someone else who's a bit more wise on these topics has an opinion I'd
> listen to them. I find myself rewatching this presentation from
> Maxime/Antoine as a primer on all of this:
>
> https://www.youtube.com/watch?v=K962S9gTBVM
:)
> If anyone's got any recommended resources for me to read in particular I
> am all ears.
I think Russell and Andrew did a good job clarifying some quirks with
all these standards :
https://elixir.bootlin.com/linux/latest/source/Documentation/networking/phy.rst#L229
There are some more info in Andrew's LPC talk here :
http://vger.kernel.org/lpc_net2018_talks/phylink-and-sfp-slides.pdf
(more phylink related though)
But I agree that this is hard to fully grasp, there are so many
variants everywhere, some standard, some ad-hoc standards, etc.
Maxime
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