From: Tao Ren <taoren@fb.com>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Vladimir Oltean <olteanv@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Heiner Kallweit <hkallweit1@gmail.com>,
"David S . Miller" <davem@davemloft.net>,
Arun Parameswaran <arun.parameswaran@broadcom.com>,
Justin Chen <justinpopo6@gmail.com>,
netdev <netdev@vger.kernel.org>,
lkml <linux-kernel@vger.kernel.org>,
Andrew Jeffery <andrew@aj.id.au>,
"openbmc@lists.ozlabs.org" <openbmc@lists.ozlabs.org>
Subject: Re: [PATCH net-next 2/2] net: phy: broadcom: add 1000Base-X support for BCM54616S
Date: Wed, 31 Jul 2019 02:09:08 +0000 [thread overview]
Message-ID: <885e48dd-df5b-7f08-ef58-557fc2347fa6@fb.com> (raw)
In-Reply-To: <20190731013636.GC25700@lunn.ch>
On 7/30/19 6:36 PM, Andrew Lunn wrote:
>> The INTF_SEL pins report correct mode (RGMII-Fiber) on my machine,
>> but there are 2 "sub-modes" (1000Base-X and 100Base-FX) and I
>> couldn't find a proper/safe way to auto-detect which "sub-mode" is
>> active. The datasheet just describes instructions to enable a
>> specific mode, but it doesn't say 1000Base-X/100Base-FX mode will be
>> auto-selected. And that's why I came up with the patch to specify
>> 1000Base-X mode.
>
> Fibre does not perform any sort of auto-negotiation. I assume you have
> an SFP connected? When using PHYLINK, the sfp driver will get the
> supported baud rate from SFP EEPROM to determine what speed could be
> used. However, there is currently no mainline support for having a
> chain MAC-PHY-SFP. For that you need Russells out of tree patches.
Hi Andrew,
The BCM54616S PHY on my machine is connected to a BCM5396 switch chip over backplane (1000Base-KX).
Thanks,
Tao
next prev parent reply other threads:[~2019-07-31 2:09 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-30 0:25 [PATCH net-next 2/2] net: phy: broadcom: add 1000Base-X support for BCM54616S Tao Ren
2019-07-30 1:32 ` Vladimir Oltean
2019-07-30 1:32 ` Vladimir Oltean
2019-07-30 4:52 ` Tao Ren
2019-07-30 10:15 ` Vladimir Oltean
2019-07-30 10:15 ` Vladimir Oltean
2019-07-30 13:17 ` Andrew Lunn
2019-07-31 0:15 ` Tao Ren
2019-07-30 23:44 ` Tao Ren
2019-07-31 1:36 ` Andrew Lunn
2019-07-31 2:09 ` Tao Ren [this message]
2019-07-31 2:34 ` Andrew Lunn
2019-07-31 5:55 ` Tao Ren
2019-08-01 5:07 ` Tao Ren
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