From: Alexander Wilhelm <alexander.wilhelm@westermo.com>
To: "Russell King (Oracle)" <linux@armlinux.org.uk>
Cc: Vladimir Oltean <vladimir.oltean@nxp.com>,
Andrew Lunn <andrew@lunn.ch>,
Heiner Kallweit <hkallweit1@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: Aquantia PHY in OCSGMII mode?
Date: Wed, 27 Aug 2025 11:03:42 +0200 [thread overview]
Message-ID: <aK7J7kOltB/IiYUd@FUE-ALEWI-WINX> (raw)
In-Reply-To: <aK7GNVi8ED0YiWau@shell.armlinux.org.uk>
Am Wed, Aug 27, 2025 at 09:47:49AM +0100 schrieb Russell King (Oracle):
> On Wed, Aug 27, 2025 at 10:41:11AM +0200, Alexander Wilhelm wrote:
> > Set to 100M:
> >
> > fsl_dpaa_mac: [DEBUG] <memac_link_down> called
> > fsl_dpaa_mac: [DEBUG] <memac_link_up> called
> > fsl_dpaa_mac: [DEBUG] * mode: 0
> > fsl_dpaa_mac: [DEBUG] * phy_mode(interface): 2500base-x
> > fsl_dpaa_mac: [DEBUG] * memac_if_mode: 00000002 (IF_MODE_GMII)
> > fsl_dpaa_mac: [DEBUG] * speed: 2500
> > fsl_dpaa_mac: [DEBUG] * duplex: 1
> > fsl_dpaa_mac: [DEBUG] * tx_pause: 1
> > fsl_dpaa_mac: [DEBUG] * rx_pause: 1
>
> So the PHY reported that it's using 2500base-X ("OCSGMII") for 100M,
> which means 0x31b 3 LSBs are 4. Your hardware engineer appears to be
> incorrect in his statement.
I asked the hardware engineer again. The point is that the MAC does not set
SGMII for 100M. It still uses 2500base-x but with 10x paket repetition. He could
measure and proof that with a logic analyzer.
Best regards
Alexander Wilhelm
next prev parent reply other threads:[~2025-08-27 9:04 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-31 14:59 Aquantia PHY in OCSGMII mode? Alexander Wilhelm
2025-07-31 15:14 ` Andrew Lunn
2025-07-31 16:02 ` Russell King (Oracle)
2025-08-01 5:44 ` Alexander Wilhelm
2025-08-04 14:53 ` Andrew Lunn
2025-07-31 17:16 ` Vladimir Oltean
2025-07-31 19:26 ` Russell King (Oracle)
2025-08-01 5:50 ` Alexander Wilhelm
2025-08-01 11:01 ` Vladimir Oltean
2025-08-01 11:54 ` Alexander Wilhelm
2025-08-01 11:58 ` Russell King (Oracle)
2025-08-01 12:06 ` Alexander Wilhelm
2025-08-01 12:23 ` Russell King (Oracle)
2025-08-01 12:36 ` Alexander Wilhelm
2025-08-01 13:04 ` Vladimir Oltean
2025-08-01 14:02 ` Russell King (Oracle)
2025-08-01 14:37 ` Vladimir Oltean
2025-08-04 6:17 ` Alexander Wilhelm
2025-08-04 10:01 ` Vladimir Oltean
2025-08-04 13:01 ` Alexander Wilhelm
2025-08-04 13:41 ` Vladimir Oltean
2025-08-04 14:47 ` Alexander Wilhelm
2025-08-04 16:00 ` Vladimir Oltean
2025-08-04 16:02 ` Vladimir Oltean
2025-08-05 7:59 ` Alexander Wilhelm
2025-08-05 10:20 ` Vladimir Oltean
2025-08-05 12:44 ` Alexander Wilhelm
2025-08-06 14:58 ` Vladimir Oltean
2025-08-07 5:56 ` Alexander Wilhelm
2025-08-27 5:57 ` Alexander Wilhelm
2025-08-27 7:31 ` Vladimir Oltean
2025-08-27 8:41 ` Alexander Wilhelm
2025-08-27 8:47 ` Russell King (Oracle)
2025-08-27 9:03 ` Alexander Wilhelm [this message]
2025-08-27 9:13 ` Russell King (Oracle)
2025-08-28 9:28 ` Vladimir Oltean
2025-10-02 5:54 ` Alexander Wilhelm
2025-10-07 14:08 ` Vladimir Oltean
2025-10-08 7:47 ` Alexander Wilhelm
2025-10-08 11:10 ` Vladimir Oltean
2025-10-08 12:52 ` Russell King (Oracle)
2025-10-08 13:00 ` Vladimir Oltean
2025-10-08 13:28 ` Alexander Wilhelm
2025-10-08 14:55 ` Vladimir Oltean
2025-10-09 6:05 ` Alexander Wilhelm
2025-08-27 8:08 ` Russell King (Oracle)
2025-08-27 8:32 ` Alexander Wilhelm
2025-08-27 8:45 ` Russell King (Oracle)
2025-08-04 14:22 ` Russell King (Oracle)
2025-08-04 14:51 ` Alexander Wilhelm
2025-08-04 14:56 ` Vladimir Oltean
2025-08-01 11:13 ` Vladimir Oltean
2025-08-01 5:53 ` Alexander Wilhelm
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