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    Subject[PATCH 0/2] RTL8211F: RGMII RX/TX delay configuration improvements
    Date
    In discussion with Andrew [0] we figured out that it would be best to
    make the RX delay of the RTL8211F PHY configurable (just like the TX
    delay is already configurable).

    While here I took the opportunity to add some logging to the TX delay
    configuration as well.

    There is no public documentation for the RX and TX delay registers.
    I received this information a while ago (and created this RfC patch
    back then: [1]). Realtek gave me permission to take the information
    from the datasheet extracts and phase them in my own words and publish
    that (I am not allowed to publish the datasheet extracts).

    I have tested these patches on two boards:
    - Amlogic Meson8b Odroid-C1
    - Amlogic GXM Khadas VIM2
    Both still behave as before these changes (iperf3 speeds are the same
    in both directions: RX and TX), which is expected because they are
    currently using phy-mode = "rgmii" with the RX delay not being generated
    by the PHY.


    [0] https://patchwork.ozlabs.org/patch/1215313/
    [1] https://patchwork.ozlabs.org/patch/843946/


    Martin Blumenstingl (2):
    net: phy: realtek: add logging for the RGMII TX delay configuration
    net: phy: realtek: add support for configuring the RX delay on
    RTL8211F

    drivers/net/phy/realtek.c | 59 +++++++++++++++++++++++++++++++++------
    1 file changed, 51 insertions(+), 8 deletions(-)

    --
    2.24.1

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