if yes - how to set it ?
why? - “want to compress the streams and send them to M.2 pci-e” - from dev
“we need to flip the lanes to connect it to a different module”
“How do we do the lane flipping”
For AGX there is such thing as reverese polarity support:
PCIe controller configurations:
x8 lane co```
The Jetson Xavier NX module integrates two PCIe controllers supporting:
• Connections to two interfaces (1x1 + 1x4).
• x1 (supports Root Port only), x4 (supports Root Port or Endpoint modes) Upstream and downstream AXI interfaces
that serve as the control path from the Jetson Xavier NX to the external PCIe device
• Gen3 (8 GT/s), supported on x1
• Gen4 (16 GT/s) supported on x4
• Two PCIe controllers, five lanes for a total of 144 GT/s. One controller operates in x1 mode only. The second
controller can operate in x1 or x2 or x4 mode
```nfigurations
Supports x8, x4, x2, and x1 links
Supports both root port and endpoint modes
Supports lane reversal for x8, x4 or x2 and lane flipping for x4, x2 or x1PCIe controller configurations:
x8 lane configurations
Supports x8, x4, x2, and x1 links
Supports both root port and endpoint modes
Supports lane reversal for x8, x4 or x2 and lane flipping for x4, x2 or x1
that is for AGX though from https://static5.arrow.com/pdfs/2018/12/12/12/23/2/725718/nvda_/manual/jetsonxaviersomdatasheet_v0.9.pdf
The Jetson Xavier NX module integrates two PCIe controllers supporting:
• Connections to two interfaces (1x1 + 1x4).
• x1 (supports Root Port only), x4 (supports Root Port or Endpoint modes) Upstream and downstream AXI interfaces
that serve as the control path from the Jetson Xavier NX to the external PCIe device
• Gen3 (8 GT/s), supported on x1
• Gen4 (16 GT/s) supported on x4
• Two PCIe controllers, five lanes for a total of 144 GT/s. One controller operates in x1 mode only. The second
controller can operate in x1 or x2 or x4 mode
nvidia,tegra19x-pcie.txt (8.4 KB) nvidia,tegra19x-pcie-ep.txt (5.2 KB)