non-NVME PCIE device not showing up in lspci

Canonical Ubuntu Ubuntu OS issues
1

I have a similar issue regarding PCIE, where my m.2 pcie device is detected in Jetson, but not in Rubit pi.

Related discussion.

ubuntu@ubuntu:~$ uname -a
Linux ubuntu 6.8.0-1051-qcom #51oem3-Ubuntu SMP PREEMPT_DYNAMIC Wed Jul 23 15:09:17 UTC 2025 aarch64 aarch64 aarch64 GNU/Linux

I did some debugging, and i realise that the current kernel seems to assert the PERST# signal low about 5 seconds into the kernel boot. Then I got the following phy error at about 6-7 second into boot

[    6.723864] qcom-pcie 1c08000.pcie: Phy link never came up
[    6.729697] qcom-pcie 1c08000.pcie: PCI host bridge to bus 0001:00

I also observe that the RJ45’s green and amber light blinks briefly at the same time.

I have a few questions:

  • May I know if this is intentional?
  • which pin of QCS6490 is controlling this reset signal? Relevant source code would also be great.
  • In the related discussion, what was the fix eventually? I cant seem to open that git.launchpad.net link and the bin file has expired. Some elaboration would be great. To understand if the issue solved is related to my case.

Thanks!

2

We have fixed this issue. Please update to the latest version and test again.

For specific changes, please refer to the following link.