Hi, We want to configure x1 lane of the PCIe x4 (C4) node. When we checked demo card, we noticed that lines connected in reverse.Which lane should we connect to use as x1? Is correct lane (UPHY block 0, lane 4) or (UPHY block 0, lane 7). Can this be selected from the device-tree? What is your sugg…

AGX Orin PCIe node C4 connection

sgursal April 29, 2025, 4:56pm 9

UPHY_RX22/TX22(Lane 4) is PCIe controller #4 Lane 0 in this case.

Topic		Replies	Views
Question about pcie lane reversal Jetson AGX Xavier pcie , board-design	7	1441	October 18, 2021
PCIe 0 x4 Lane Reversal Jetson Orin NX hw , board-design	2	747	July 24, 2023
AGX OrinUSB 3.2, PCIe, UFS, and MGBE Mapping Options Jetson AGX Orin documentation	9	1250	June 29, 2022
AGX ORIN PCIE (C4) Lane Reverse? Jetson AGX Orin pcie , hw , question , lane-reversal	4	59	May 6, 2025
PCIe lane reversal on C0 Jetson AGX Xavier pcie , hw , device-tree	6	3216	October 18, 2021
Lane reversal on UPHY2 PCIe x4 for AGX Orin Jetson AGX Orin pcie	7	556	September 25, 2023
How to config PCIe C4 on AGX orin Jetson AGX Orin pcie , board-design	5	68	January 9, 2025
M.2 carrier board schematic Jetson AGX Orin board-design	4	149	September 16, 2024
Pcie lane reversal on C5 Jetson AGX Orin pcie , board-design	2	762	August 10, 2022
Using a PCIe x4 device on C7 controller under configuration #2 Jetson AGX Orin pcie , board-design	2	408	April 12, 2023