GMAC Fixed-link mode TX OK, RX NG

[StanleyShen]

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;
+        };
 };

[StanleyShen]

Hi @MayanksPatel 

Thank you for you replay.

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

Thank you again

[MayanksPatel]

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

[MayanksPatel · Accepted solution]

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