USB3 not disconnecting in the kernel

Robotics & Edge Computing Jetson & Embedded Systems Jetson Orin Nano
,
1

We have a custom carrier board with 2 usb-c ports. The dtsi file has been modified to reflect the hardware changes and to enable to second usb-c port.
But below is the screenshot of the dmesg logs and its missing the disconnect for usb2-1 when i unplug the usbc device.

{A718638E-5237-420B-A428-19874B0D3EF7}
{A718638E-5237-420B-A428-19874B0D3EF7}778×415 11.7 KB

/*
 * Copyright (c) 2022-2023, NVIDIA CORPORATION.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 */
#include <dt-bindings/gpio/tegra234-gpio.h>
#include "dt-bindings/input/input.h"
#include "tegra234-p3768-0000-a0-pwm-fan.dtsi"
#include "tegra234-p3768-0000-a0-pcie.dtsi"
#include "tegra234-p3768-0000-a0-fixed-regulator.dtsi"
#include "tegra234-p3768-audio.dtsi"
#include "tegra234-p3768-camera-rbpcv3-imx477.dtsi"
#include "tegra234-p3768-camera-rbpcv2-imx219.dtsi"

/ {
	gpio-keys {
		compatible = "gpio-keys";
		gpio-keys,name = "gpio-keys";
		status = "okay";

		forcerecovery {
			label = "force-recovery";
			gpios = <&tegra_main_gpio TEGRA234_MAIN_GPIO(G, 0) GPIO_ACTIVE_LOW>;
			linux,code = <BTN_1>;
		};

		power_key {
			label = "power-key";
			gpios = <&tegra_aon_gpio TEGRA234_AON_GPIO(EE, 4) GPIO_ACTIVE_LOW>;
			linux,code = <KEY_POWER>;
			gpio-key,wakeup;
		};
	};

	eeprom-manager {
		data-size = <0x100>;
		bus@0 {
			i2c-bus = <&gen1_i2c>;
			eeprom@1 {
				slave-address = <0x57>;
				label = "cvb";
			};
		};

		bus@1 {
			i2c-bus = <&gen2_i2c>;
			eeprom@1 {
				slave-address = <0x50>;
				label = "super-module";
			};
		};
	};

	xusb_padctl: xusb_padctl@3520000 {
		status = "okay";
		pads {
			usb2 {
				lanes {
					usb2-0 {
						nvidia,function = "xusb";
						status = "okay";
					};
					usb2-1 {
						nvidia,function = "xusb";
						status = "okay";
					};
					usb2-2 {
						nvidia,function = "xusb";
						status = "okay";
					};
				};
			};
			usb3 {
				lanes {
					usb3-0 {
						nvidia,function = "xusb";
						status = "okay";
					};
					usb3-1 {
						nvidia,function = "xusb";
						status = "okay";
					};
					usb3-2 {/* ERIC T 11/13/23 Added to enable third lane of USB3 used on our carrier board*/
						nvidia,function = "xusb";
						status = "okay";
					};
				};
			};
		};

		ports {
			usb2-0 {/* Goes to recovery port J13*/
				mode = "otg";
				status = "okay";
				vbus-supply = <&p3768_vdd_5v_sys>;
				usb-role-switch;
				port {
					typec_p0: endpoint {
						remote-endpoint = <&fusb_p0>;
					};
				};
			};
			usb2-1 {/* Goes to J12 */
				mode = "host";
				status = "okay";
				vbus-supply = <&p3768_vdd_5v_sys>;
				port {
					typec_p1: endpoint {
						remote-endpoint = <&fusb_p1>;
					};
				};
			};
			usb2-2 {/* Goes to J5/J6 */
				mode = "host";
				vbus-supply = <&p3768_vdd_5v_sys>;
				status = "okay";
			};
			usb3-0 {/* Goes to J13 */
				nvidia,usb2-companion = <0>; /*ERIC T 2/26/24 Swapped from 1 --> 0 to support VGW */
				status = "okay";
			};
			usb3-1 {/* Goes to J12 */
				nvidia,usb2-companion = <1>; /*ERIC T 2/26/24 Swapped from 0 --> 1 to support VGW */
				status = "okay";
			};
			usb3-2 {/* Goes to J5/J6 */
				/* ERIC T 11/13/23 Added to enable third lane of USB3 used on our carrier board*/
				nvidia,usb2-companion = <2>;
				status = "okay";
			};
		};
	};

	tegra_xudc: xudc@3550000 {
		status = "okay";
		phys = <&{/xusb_padctl@3520000/pads/usb2/lanes/usb2-0}>,
			<&{/xusb_padctl@3520000/pads/usb3/lanes/usb3-1}>;
		phy-names = "usb2-0", "usb3-1";
		nvidia,xusb-padctl = <&xusb_padctl>;
	};

	tegra_xhci: xhci@3610000 {
		status = "okay";
		phys = <&{/xusb_padctl@3520000/pads/usb2/lanes/usb2-0}>,
				<&{/xusb_padctl@3520000/pads/usb2/lanes/usb2-1}>,
				<&{/xusb_padctl@3520000/pads/usb2/lanes/usb2-2}>,
				<&{/xusb_padctl@3520000/pads/usb3/lanes/usb3-0}>,
				<&{/xusb_padctl@3520000/pads/usb3/lanes/usb3-1}>,
				<&{/xusb_padctl@3520000/pads/usb3/lanes/usb3-2}>;/* ERIC T 11/13/23 Added to enable third lane of USB3 used on our carrier board*/
		phy-names = "usb2-0", "usb2-1", "usb2-2", "usb3-0", "usb3-1", "usb3-2";/* ERIC T 11/13/23 Added to enable third lane of USB3 used on our carrier board*/
		nvidia,xusb-padctl = <&xusb_padctl>;
	};

	i2c@c240000{
		status = "okay";
		fusb301@25 {
			compatible = "onsemi,fusb301";
			reg = <0x25>;
			status = "okay";
			interrupt-parent = <&tegra_main_gpio>;
			interrupts = <TEGRA234_MAIN_GPIO(Z, 1) IRQ_TYPE_LEVEL_LOW>;
			connector@0 {
				port@0 {
					fusb_p0: endpoint {
						remote-endpoint = <&typec_p0>;
					};
				};
			};
		};
	};
	
	i2c@c250000{
		status = "okay";
		fusb301@25 {
			compatible = "onsemi,fusb301";
			reg = <0x25>;
			status = "okay";
			interrupt-parent = <&tegra_main_gpio>;
			interrupts = <TEGRA234_MAIN_GPIO(H, 0) IRQ_TYPE_LEVEL_LOW>;
			connector@0 {
				port@0 {
					fusb_p1: endpoint {
						remote-endpoint = <&typec_p1>;
					};
				};
			};
		};
	};
	
	spi@3210000{ /* SPI1 in 40 pin conn */
		status = "okay";
		spi@0 { /* chip select 0 */
			compatible = "tegra-spidev";
			reg = <0x0>;
			spi-max-frequency = <50000000>;
			controller-data {
				nvidia,enable-hw-based-cs;
				nvidia,rx-clk-tap-delay = <0x10>;
				nvidia,tx-clk-tap-delay = <0x0>;
			};
		};
		spi@1 { /* chip select 1 */
			compatible = "tegra-spidev";
			reg = <0x1>;
			spi-max-frequency = <50000000>;
			controller-data {
				nvidia,enable-hw-based-cs;
				nvidia,rx-clk-tap-delay = <0x10>;
				nvidia,tx-clk-tap-delay = <0x0>;
			};
		};
	};

	spi@3230000{ /* SPI3 in 40 pin conn */
		status = "okay";
		spi@0 { /* chip select 0 */
			compatible = "tegra-spidev";
			reg = <0x0>;
			spi-max-frequency = <50000000>;
			controller-data {
				nvidia,enable-hw-based-cs;
				nvidia,rx-clk-tap-delay = <0x10>;
				nvidia,tx-clk-tap-delay = <0x0>;
			};
		};
		spi@1 { /* chips select 1 */
			compatible = "tegra-spidev";
			reg = <0x1>;
			spi-max-frequency = <50000000>;
			controller-data {
				nvidia,enable-hw-based-cs;
				nvidia,rx-clk-tap-delay = <0x10>;
				nvidia,tx-clk-tap-delay = <0x0>;
			};
		};
	};

	serial@3100000 {/* UARTA, for 40 pin header */
		status = "okay";
	};

	mttcan@c310000 {
		status = "okay";
	};

	serial@3140000 {
		/* UARTE, Goes to M2.E and also some of the pins to bootstrap */
		status = "okay";
	};

	serial@31d0000 {/* UARTI - SBSA */
		status = "okay";
	};

	tachometer@39c0000 {
		status = "okay";
		upper-threshold = <0xfffff>;
		lower-threshold = <0x0>;
	};

	pwm@3280000 {/* PWM1 40pin header, pin 15 */
		status = "okay";
	};

	pwm@32a0000 {/* PWM3 - FAN */
		status = "okay";
	};

	pwm@c340000 { /* PWM4 - OVR */
		status = "disabled";
	};

	pwm@32c0000 {/* PWM5 40 pin header, pin 33 */
		status = "okay";
	};

	pwm@32d0000 {/* PWM6 OVR */
		status = "disabled";
	};

	pwm@32e0000 {/* PWM7 - 40pin header, pin 32 */
		status = "okay";
	};

	bluedroid_pm {
		status = "disabled";
	};

	display@13800000 {
		status = "okay";
	};

	tegra-capture-vi  {
		ports {
			port@0 {
				endpoint {
					port-index = <1>;
				};
			};
		};
	};

	host1x@13e00000 {
		nvcsi@15a00000 {
			channel@0 {
				ports {
					port@0 {
						endpoint@0 {
							port-index = <1>;
						};
					};
				};
			};
		};
	};

	cam_i2cmux{
		i2c@0 {
			rbpcv2_imx219_a@10 {
				mode0 {
					tegra_sinterface = "serial_b";
					lane_polarity = "6";
				};
				mode1 {
					tegra_sinterface = "serial_b";
					lane_polarity = "6";
				};
				mode2 {
					tegra_sinterface = "serial_b";
					lane_polarity = "6";
				};
				mode3 {
					tegra_sinterface = "serial_b";
					lane_polarity = "6";
				};
				mode4 {
					tegra_sinterface = "serial_b";
					lane_polarity = "6";
				};
				ports {
					port@0 {
						endpoint {
							port-index = <1>;
						};
					};
				};
			};

			rbpcv3_imx477_a@1a {
				mode0 {
					tegra_sinterface = "serial_b";
					lane_polarity = "6";
				};
				mode1 {
					tegra_sinterface = "serial_b";
					lane_polarity = "6";
				};
				ports {
					port@0 {
						endpoint {
							port-index = <1>;
						};
					};
				};
			};
		};
	};
};
3

Hi,
Have you done compliance test to the port? For custom board, please do the test to ensure signal quality is good. You can find guidance in download center:

Jetson Download Center | NVIDIA Developer

4

Hi @DaneLLL

I am on the orin nano platform, I couldnt find any test documents from the download link for the orin nano.

Which document are you referring too?

5

Hi,
Please check this:

https://developer.nvidia.com/downloads/jetson-orin-nx-series-orin-nano-series-tuning-complinace-guide

6

We dont have access to the oscope software for usb testing.
Lets say all the signal looks good. Since all the usb ports functions properly, Only one of the usbc port wont register the disconnect in the kernel when i unplug the device.
How might i further debug what might be happening?

The original device tree files functions properly. But when I add the second usbc device in the device tree, the original port wont register the unplug event…

7

Hi,
We would highly recommend do compliance test for the ports on custom board. To Ensure eye diagram is expected.

For software testing, you may try

  1. Enable the type-C usb3-0+usb2-0 and disable usb3-1+usb2-1
  2. Disable the type-C usb3-0+usb2-0 and enable usb3-1+usb2-1

To check if it works when only enabling single type-C port.

9

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