On Wed, 23 Mar 2022, Ben Dooks wrote: > > FWIW, I have tested this and it solved my issue with nvme not being probed, > > so: > > > > Tested-by: Alexandre Ghiti <alexandre.ghiti@xxxxxxxxxxxxx> > > Ok, great. Our test rig seems to be still working with this. I ran simple verification of your change by interrupting U-Boot after a power-up and issuing: => setenv boot_pci_enum true at the command prompt before booting from the uSD card and curiously enough the root port comes up with the Link Capabilities Register reporting the lack of Link Bandwidth Notification Capability in this scenario, while it reports its presence if booted undisturbed, i.e.: LnkCap: Port #0, Speed 8GT/s, Width x8, ASPM L0s L1, Exit Latency L0s <4us, L1 <4us ClockPM- Surprise- LLActRep+ BwNot- ASPMOptComp+ vs: LnkCap: Port #0, Speed 8GT/s, Width x8, ASPM L0s L1, Exit Latency L0s <4us, L1 <4us ClockPM- Surprise- LLActRep+ BwNot+ ASPMOptComp+ It is fully reproducible. Any idea what might be causing it? I can't see it being explicitly set or cleared anywhere, be it in U-Boot or Linux, so it must be done by the device itself depending on something. And the lack of this capability seems to me like non-compliance for a multiple-lane, multiple-speed device. Maciej
