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    SubjectRe: [PATCH net-next 2/2] net: phy: broadcom: add 1000Base-X support for BCM54616S
    Date
    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
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