From: Andrew Lunn <andrew@lunn.ch>
To: Daniel Golle <daniel@makrotopia.org>
Cc: netdev@vger.kernel.org, linux-mediatek@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Heiner Kallweit <hkallweit1@gmail.com>,
Russell King <linux@armlinux.org.uk>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>
Subject: Re: [PATCH 1/8] net: phy: realtek: rtl8221: allow to configure SERDES mode
Date: Thu, 11 May 2023 02:38:19 +0200 [thread overview]
Message-ID: <8fdffc76-4b2f-44ea-9800-1e5d3624d94e@lunn.ch> (raw)
In-Reply-To: <302d982c5550f10d589735fc2e46cf27386c39f4.1683756691.git.daniel@makrotopia.org>
> +#define RTL8221B_SERDES_OPTION_MODE_2500BASEX_SGMII 0
> +#define RTL8221B_SERDES_OPTION_MODE_HISGMII_SGMII 1
> +#define RTL8221B_SERDES_OPTION_MODE_2500BASEX 2
So what is 2500BASEX_SGMII? You cannot run SGMII at 2.5G, because
there is no way to repeat a symbol 2.5 times so that a 1G stream takes
up 2.5G bandwidth. The SGMII signalling also does not work at 2.5G.
Please add an explanation what this actually is.
Andrew
next prev parent reply other threads:[~2023-05-11 0:38 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-10 22:53 [PATCH net-next 0/8] Improvements for RealTek 2.5G Ethernet PHYs Daniel Golle
2023-05-10 22:53 ` [PATCH net-next 1/8] net: phy: realtek: rtl8221: allow to configure SERDES mode Alexander Couzens
2023-05-10 22:56 ` [PATCH " Daniel Golle
2023-05-11 0:34 ` Andrew Lunn
2023-05-11 0:38 ` Andrew Lunn [this message]
2023-05-11 11:50 ` Daniel Golle
2023-05-11 0:41 ` Andrew Lunn
2023-05-11 11:53 ` Daniel Golle
2023-05-11 7:53 ` [PATCH net-next " Steen Hegelund
2023-05-10 22:54 ` [PATCH net-next 2/8] net: phy: realtek: switch interface mode for RTL822x series Chukun Pan
2023-05-10 22:57 ` Daniel Golle
2023-05-10 22:55 ` [PATCH net-next 3/8] net: phy: realtek: use genphy_soft_reset for 2.5G PHYs Daniel Golle
2023-05-10 22:57 ` Daniel Golle
2023-05-10 22:58 ` [PATCH net-next 4/8] net: phy: realtek: disable SGMII in-band AN " Daniel Golle
2023-05-10 22:58 ` [PATCH net-next 5/8] net: phy: realtek: make sure paged read is protected by mutex Daniel Golle
2023-05-10 22:59 ` [PATCH net-next 6/8] net: phy: realtek: use inline functions for 10GbE advertisement Daniel Golle
2023-05-10 22:59 ` [PATCH net-next 7/8] net: phy: realtek: check validity of 10GbE link-partner advertisement Daniel Golle
2023-05-10 23:00 ` [PATCH net-next 8/8] net: phy: realtek: setup ALDPS on RTL8221B Daniel Golle
2023-05-11 0:28 ` [PATCH net-next 0/8] Improvements for RealTek 2.5G Ethernet PHYs Andrew Lunn
2023-05-11 17:14 ` Daniel Golle
2023-05-11 17:30 ` Russell King (Oracle)
2023-05-11 18:09 ` Russell King (Oracle)
2023-05-13 17:52 ` Daniel Golle
2023-05-13 19:24 ` Russell King (Oracle)
2023-05-11 5:29 ` Heiner Kallweit
2023-05-11 11:44 ` Daniel Golle
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