topic GMAC Fixed-link mode TX OK, RX NG in S32G

GMAC Fixed-link mode TX OK, RX NG

StanleyShen — Wed, 30 Aug 2023 15:31:52 GMT

Hi there.

We had a problem using PFE for MAC2MAC connection before, but we haven't received an answer.

RMII & Fixed-link under PFE TX OK but RX NG - NXP Community

So we have now used GMAC for testing.

The device tree has been modified as follows, but it has been found that the problem is the same. Can you please explain the reason to me? Are there any issues with NXP's MAC2MAC support?

diff --git a/arch/arm64/boot/dts/freescale/s32gxxxa-rdb.dtsi b/arch/arm64/boot/dts/freescale/s32gxxxa-rdb.dtsi index e1fbd28bb..98544ff9c 100644 --- a/arch/arm64/boot/dts/freescale/s32gxxxa-rdb.dtsi +++ b/arch/arm64/boot/dts/freescale/s32gxxxa-rdb.dtsi @@ -23,15 +23,26 @@ status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&gmac0rgmiia_pins>, <&gmac0mdioa_pins>; - phy-handle = <&gmac_mdio_a_phy1>; - phy-mode = "rgmii-id"; +// phy-handle = <&gmac_mdio_a_phy1>; + phy-mode = "rgmii"; + fixed-link { + speed = <10>; + full-duplex; + }; };

Re: GMAC Fixed-link mode TX OK, RX NG

MayanksPatel — Thu, 31 Aug 2023 09:24:28 GMT

Hi @StanleyShen,

Sorry for the delay.

I have created a ticket with the internal team for the same and I will get back to you on this.

Thank you for your patience.

Thanks,

Mayank S Patel

Re: GMAC Fixed-link mode TX OK, RX NG

MayanksPatel — Tue, 05 Sep 2023 06:24:55 GMT

Hi @StanleyShen,

The same suggestion for GMAC was previously provided for PFE.

you can use a GPIO signal, which is controlled in Linux, to enable the 5G module.

So the solution for that is to bring up the 5G module as early as possible before initializing the related clock.

Thanks,

Mayank S Patel

回复： GMAC Fixed-link mode TX OK, RX NG

StanleyShen — Wed, 20 Sep 2023 11:52:59 GMT

Hi @MayanksPatel

Thank you for you replay.

Previously, we also found this situation and resolved it using the same method.

Thank you again