From: Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>
To: Maxime Chevallier <maxime.chevallier@bootlin.com>
Cc: Thomas Karpiniec <tom.karpiniec@outlook.com>,
Coia Prant <coiaprant@gmail.com>,
netdev@vger.kernel.org, Russell King <linux@armlinux.org.uk>,
Andrew Lunn <andrew+netdev@lunn.ch>,
"David S . Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Choong Yong Liang <yong.liang.choong@linux.intel.com>,
Bartosz Golaszewski <brgl@kernel.org>,
Russell King <rmk+kernel@armlinux.org.uk>,
linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH net 2/2] net: stmmac: qcom-ethqos: advertise supported SerDes interfaces
Date: Thu, 17 Sep 2026 21:29:49 +0530 [thread overview]
Message-ID: <aqwOdSqxHDscsbIN@oss.qualcomm.com> (raw)
In-Reply-To: <3bdf2ecc-9dd1-428c-8841-36b1f19916e7@bootlin.com>
On Thu, Sep 17, 2026 at 07:36:42AM +0200, Maxime Chevallier wrote:
> On 9/17/26 06:29, Thomas Karpiniec wrote:
> > This POC did show that STMMAC_FLAG_SERDES_SUPPORTS_2500M enabled phylink to configure the integrated PCS for 2500BASE-X and a 2.5 Gbps link came up with no apparent issues.
>
> Maybe the blind spot is inband aneg. Mohd, you were quite involved in
> this, do you remember where we stand on that front ?
>
That sounds about right. Let me go through the older emails and the logs
I had captured at the time to jog my memory.
Thomas, it would be useful to know if switching between 1G and 2.5G
causes any PCS instability. I remember that particular test case causing
a lot of SerDes link flapping.
Note that I was testing the QCS9100 board which has the AQR115C PHY (and
due to its rate matching capabilities, phylink presents all speeds by
default, unlike QCA8081).
In parallel, I will try to test out boards with both of these PHYs as
well.
Ayaan
prev parent reply other threads:[~2026-09-17 15:59 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-16 10:39 [PATCH net 0/2] stmmac: fix ETHQOS SerDes interface handling Thomas Karpiniec
2026-09-16 10:39 ` [PATCH net 1/2] net: stmmac: propagate platform mac_finish errors Thomas Karpiniec
2026-09-16 12:03 ` Mohd Ayaan Anwar
2026-09-17 4:01 ` Thomas Karpiniec
2026-09-16 13:02 ` Maxime Chevallier
2026-09-16 10:39 ` [PATCH net 2/2] net: stmmac: qcom-ethqos: advertise supported SerDes interfaces Thomas Karpiniec
2026-09-16 12:17 ` Mohd Ayaan Anwar
2026-09-16 12:58 ` Maxime Chevallier
2026-09-17 4:29 ` Thomas Karpiniec
2026-09-17 5:36 ` Maxime Chevallier
2026-09-17 8:21 ` Coia Prant
2026-09-18 4:36 ` Thomas Karpiniec
2026-09-18 5:18 ` Mohd Ayaan Anwar
2026-09-17 15:59 ` Mohd Ayaan Anwar [this message]
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