Re: [PATCH] arm64: dts: rockchip: change eth phy mode to rgmii-id for orangepi r1 plus lts

Heiko Stuebner
2025-01-31T09:03:06Z

Hey,

Am Freitag, 24. Januar 2025, 07:35:50 MEZ schrieb Dragan Simic:
> Hello Tianling,
>
> On 2025-01-24 07:28, Tianling Shen wrote:
> > On 2025/1/19 23:48, Tianling Shen wrote:
> >> On 2025/1/19 19:36, Dragan Simic wrote:
> >>> On 2025-01-19 12:15, Tianling Shen wrote:
> >>>> On 2025/1/19 17:54, Dragan Simic wrote:
> >>>>> Thanks for the patch. Please, see a comment below.
> >>>>>
> >>>>> On 2025-01-19 10:11, Tianling Shen wrote:
> >>>>>> In general the delay should be added by the PHY instead of the
> >>>>>> MAC,
> >>>>>> and this improves network stability on some boards which seem to
> >>>>>> need different delay.
> >>>>>>
> >>>>>> Fixes: 387b3bbac5ea ("arm64: dts: rockchip: Add Xunlong OrangePi
> >>>>>> R1 Plus LTS")
> >>>>>> Cc: stable@vger.kernel.org # 6.6+
> >>>>>> Signed-off-by: Tianling Shen <cnsztl@gmail.com>
> >>>>>> ---
> >>>>>> arch/arm64/boot/dts/rockchip/rk3328-orangepi-r1-plus-lts.dts | 3
> >>>>>> +--
> >>>>>> arch/arm64/boot/dts/rockchip/rk3328-orangepi-r1-plus.dts | 1
> >>>>>> +
> >>>>>> arch/arm64/boot/dts/rockchip/rk3328-orangepi-r1-plus.dtsi | 1
> >>>>>> -
> >>>>>> 3 files changed, 2 insertions(+), 3 deletions(-)
> >>>>>>
> >>>>>> diff --git
> >>>>>> a/arch/arm64/boot/dts/rockchip/rk3328-orangepi-r1-plus-lts.dts
> >>>>>> b/arch/arm64/boot/dts/rockchip/rk3328-orangepi-r1-plus-lts.dts
> >>>>>> index 67c246ad8b8c..ec2ce894da1f 100644
> >>>>>> --- a/arch/arm64/boot/dts/rockchip/rk3328-orangepi-r1-plus-lts.dts
> >>>>>> +++ b/arch/arm64/boot/dts/rockchip/rk3328-orangepi-r1-plus-lts.dts
> >>>>>> @@ -17,8 +17,7 @@ / {
> >>>>>>
> >>>>>> &gmac2io {
> >>>>>> phy-handle = <&yt8531c>;
> >>>>>> - tx_delay = <0x19>;
> >>>>>> - rx_delay = <0x05>;
> >>>>>> + phy-mode = "rgmii-id";
> >>>>>
> >>>>> Shouldn't the "tx_delay" and "rx_delay" DT parameters be converted
> >>>>> into the "tx-internal-delay-ps" and "rx-internal-delay-ps"
> >>>>> parameters,
> >>>>> respectively, so the Motorcomm PHY driver can pick them up and
> >>>>> actually configure the internal PHY delays?
> >>>>
> >>>> The documentation[1] says "{t,r}x-internal-delay-ps" default to 1950
> >>>> and that value already works fine on my board.
> >>>>
> >>>> 1. https://www.kernel.org/doc/Documentation/devicetree/bindings/net/
> >>>> motorcomm%2Cyt8xxx.yaml
> >>>
> >>> I see, but those values differ from the values found in the
> >>> "tx_delay" and "rx_delay" DT parameters, so I think this patch
> >>> should be tested with at least one more Orange Pi R1 Plus LTS
> >>> board, to make sure it's all still fine.
> >>
> >> This patch has been tested on 2 boards, and we will do more tests in
> >> next week.
> >>
> >
> > Managed to test on another board and looks so far so good.
> > (Working network connection, no packet drop)
>
> Sounds good to me, thanks for the additional testing.

I assume that means there are no more open issues, right?
At least I got that impression from glancing at the thread :-)

Heiko