Issues with enabling AGX Orin PCIe C7?

[se_007]

Hello,

My goal is to get the C7 pins of PCIe enabled in root mode.
I’ve followed the instructions laid out here: Jetson AGX Orin Platform Adaptation and Bring-Up — Jetson Linux<br/>Developer Guide 34.1 documentation

1. Updated pinmux and gpio bootloader dtsi files as needed for C7 connections.

    	pex_l7_clkreq_n_pag0 {
    		nvidia,pins = "pex_l7_clkreq_n_pag0";
    		nvidia,function = "pe7";
    		nvidia,pull = <TEGRA_PIN_PULL_NONE>;
    		nvidia,tristate = <TEGRA_PIN_DISABLE>;
    		nvidia,enable-input = <TEGRA_PIN_ENABLE>;
    		nvidia,io-high-voltage = <TEGRA_PIN_ENABLE>;
    		nvidia,lpdr = <TEGRA_PIN_DISABLE>;
    	};
   
    	pex_l7_rst_n_pag1 {
    		nvidia,pins = "pex_l7_rst_n_pag1";
    		nvidia,function = "pe7";
    		nvidia,pull = <TEGRA_PIN_PULL_NONE>;
    		nvidia,tristate = <TEGRA_PIN_DISABLE>;
    		nvidia,enable-input = <TEGRA_PIN_DISABLE>;
    		nvidia,io-high-voltage = <TEGRA_PIN_ENABLE>;
    		nvidia,lpdr = <TEGRA_PIN_DISABLE>;
    	};
   

2. Updated the tegra234-p3737-pcie.dtsi file such that pcie@141e0000 is enabled:

• pcie@141e0000 {

•      status = "okay";
  

•      num-lanes = <8>;
  

•      phys = <&p2u_gbe_0>, <&p2u_gbe_1>, <&p2u_gbe_2>,
  

•                <&p2u_gbe_3>, <&p2u_gbe_4>, <&p2u_gbe_5>,
  

•                <&p2u_gbe_6>, <&p2u_gbe_7>;
  

•      phy-names = "p2u-0", "p2u-1", "p2u-2", "p2u-3",
  

•                  "p2u-4", "p2u-5", "p2u-6", "p2u-7";
  

• };

3. Updated ODMDATA to:
   ODMDATA=“gbe-uphy-config-0,hsstp-lane-map-3,hsio-uphy-config-16,nvhs-uphy-config-0”;

Probing the reset signal for C7 we noticed that it remains low and doesn’t toggle at any point on power-up.

Are there any further changes in bootloader or kernel that have been missed?

[se_007]

Solved. Didn’t include num_lanes = <8>; in device tree file.