The question about Xavier pcie ports

Autonomous Machines Jetson & Embedded Systems Jetson AGX Xavier
1

customer asked how to config the pcie port:

  1. how many ports we can configed for AGX Xavier platform.
  2. could it be configured as one 8 lanes and two 4 lanes root ports?
  3. do we have to config the pcie as the pic shows? Can we change the config through the change of dtb config?
    pcie
    pcie783×678 132 KB
3

Please refer to Table 22. Xavier Module USB 3.1, PCIe & UFS Lane Mapping Configurations in OEM DG, there are total five PCIe ports supported, 2 x 1, 1 x 2, 1 x 4 & 1 x 8.

4
  • As ‘Trumany’ mentioned, please refer to the OEM DG guide.
  • Well, technically yes. But, it can’t be done on Jetson AGX base board. A different base board needs to be designed for that. Once the HW is ready, there are changes required in both DeviceTree configuration as well as the ODM data.
  • Yes. As mentioned above, changes are required in both DT as well as ODM.
5

If customer design their own base board, and with the change in DeviceTree, can they combine the 2x1 and 1x2 to one 1x4 root port?

6

Well, that may not be possible as is. But, if you select a configuration where you have a controller enabled in x4 configuration, then use it