From: Andrew Lunn <andrew@lunn.ch>
To: Michael Walle <michael@walle.cc>
Cc: Russell King - ARM Linux admin <linux@armlinux.org.uk>,
Vladimir Oltean <olteanv@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Antoine Tenart <atenart@kernel.org>,
Quentin Schulz <quentin.schulz@bootlin.com>,
netdev@vger.kernel.org, Heiner Kallweit <hkallweit1@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Ioana Ciornei <ioana.ciornei@nxp.com>,
Maxim Kochetkov <fido_max@inbox.ru>,
Bjarni Jonasson <bjarni.jonasson@microchip.com>,
Steen Hegelund <steen.hegelund@microchip.com>,
UNGLinuxDriver@microchip.com
Subject: Re: [PATCH net-next 1/2] net: phylink: explicitly configure in-band autoneg for PHYs that support it
Date: Sat, 13 Feb 2021 17:59:31 +0100 [thread overview]
Message-ID: <YCgFc0sK1BYtAo4d@lunn.ch> (raw)
In-Reply-To: <db9f5988d7d135b3588bf9f6a5b10b08@walle.cc>
> Thanks, but I'm not sure I understand the difference between "rate
> adaption" and symbol repetition. The SGMII link is always 1.25Gb,
> right? If the media side is 100Mbit it will repeat the symbol 10
> times or 100 times in case of 10Mbit. What is "rate adaption" then?
Hi Michael
Some multiG PHYs fix their host side interface to say 10Gbps,
independent of what the media side is doing. The PHY adapts the 10Gbps
stream it gets from the host down to 10Mbps etc as needed, dropping
frames if its internal buffers overflow.
Andrew
next prev parent reply other threads:[~2021-02-13 17:00 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-12 17:23 [PATCH net-next 0/2] Let phylink manage in-band AN for the PHY Vladimir Oltean
2021-02-12 17:23 ` [PATCH net-next 1/2] net: phylink: explicitly configure in-band autoneg for PHYs that support it Vladimir Oltean
2021-02-12 22:40 ` Michael Walle
2021-02-13 0:18 ` Russell King - ARM Linux admin
2021-02-13 16:41 ` Michael Walle
2021-02-13 16:59 ` Andrew Lunn [this message]
2021-02-13 17:06 ` Russell King - ARM Linux admin
2021-02-13 0:36 ` Vladimir Oltean
2021-02-13 16:53 ` Michael Walle
2021-02-13 17:09 ` Michael Walle
2021-02-13 18:56 ` Vladimir Oltean
2021-02-13 19:57 ` Michael Walle
2021-02-13 20:12 ` Vladimir Oltean
2021-02-13 20:16 ` Russell King - ARM Linux admin
2021-02-14 10:35 ` Russell King - ARM Linux admin
2021-02-14 11:10 ` Vladimir Oltean
2021-02-14 13:18 ` Russell King - ARM Linux admin
2021-02-12 17:23 ` [PATCH net-next 2/2] net: phy: mscc: configure in-band auto-negotiation for VSC8514 Vladimir Oltean
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