On 8/19/20 6:43 AM, Geert Uytterhoeven wrote:
> Some EtherAVB variants support internal clock delay configuration, which
> can add larger delays than the delays that are typically supported by
> the PHY (using an "rgmii-*id" PHY mode, and/or "[rt]xc-skew-ps"
> properties).
>
> Historically, the EtherAVB driver configured these delays based on the
> "rgmii-*id" PHY mode. This caused issues with PHY drivers that
> implement PHY internal delays properly[1]. Hence a backwards-compatible
> workaround was added by masking the PHY mode[2].
>
> Add proper support for explicit configuration of the MAC internal clock
> delays using the new "[rt]x-internal-delay-ps" properties.
> Fall back to the old handling if none of these properties is present.
>
> [1] Commit bcf3440c6dd78bfe ("net: phy: micrel: add phy-mode support for
> the KSZ9031 PHY")
> [2] Commit 9b23203c32ee02cd ("ravb: Mask PHY mode to avoid inserting
> delays twice").
>
> Signed-off-by: Geert Uytterhoeven <geert+rene...@glider.be>
> Reviewed-by: Sergei Shtylyov <sergei.shtyl...@cogentembedded.com>
Reviewed-by: Florian Fainelli <f.faine...@gmail.com>
--
Florian
