Messages in this thread | | | Date | Wed, 31 Jul 2019 03:36:36 +0200 | From | Andrew Lunn <> | Subject | Re: [PATCH net-next 2/2] net: phy: broadcom: add 1000Base-X support for BCM54616S |
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> 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.
Andrew
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