On Tue, Feb 19, 2019 at 02:37:00PM +0100, Michal Vokáč wrote:
> The PHY must add delays to both Tx and Rx clock on the cpu port
> to work propperly.
>
> It worked with the rgmii mode before beacause the qca8k driver
> (incorrecly) enabled delays in that mode.
>
> Signed-off-by: Michal Vokáč <michal.vokac@xxxxxxxxx>
> ---
> This imx6dl-yapp4 platform is currently waiting in linux-next.
>
> Commit 5ecdd77c61c8 ("net: dsa: qca8k: disable delay for RGMII mode"), now
> also in linux-next removed the delays from the RGMII mode so the networking
> stopped working.
>
> Recently Koul submitted a patch that implements the rgmii-id mode to fix
> the issue [1].
>
> As the networking is broken at this moment it does not matter which patch
> goes in first. It is not neccessary to wait until the Koul's patch is
> applied/merged if that should be the case.
>
> [1] http://patchwork.ozlabs.org/patch/1044505/
Can we have such useful info in the commit log in some proper form?
Shawn
>
> arch/arm/boot/dts/imx6dl-yapp4-common.dtsi | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi b/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
> index b715ab0fa1ff..091d829f6b05 100644
> --- a/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
> +++ b/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
> @@ -125,7 +125,7 @@
> ethphy0: port@0 {
> reg = <0>;
> label = "cpu";
> - phy-mode = "rgmii";
> + phy-mode = "rgmii-id";
> ethernet = <&fec>;
>
> fixed-link {
> --
> 2.1.4
>
