PCI: qcom: Add D3cold support

[Steev Klimaszewski]

On Sun, May 3, 2026 at 10:37 PM Krishna Chaitanya Chundru <krishna.chundru at oss.qualcomm.com> wrote:
>
> >
> > v4 of this patchset *boots* along with Mani's patchset, however, v5 does not,
> > and unfortunately, the machine does not seem to get to a point where I can even
> > get logs from it.  Do you know what I might be missing?  I have *not* attempted
> > to remove the nvme drive and boot off USB to test it.

> This series, will not have any impact on the boot, this series comes in to the
> picture only in case
> of suspend and resume. can you share your platform details and kernel you are
> booting with.

Oddly, it seems to, because if I simply go back to v4, the system boots.  I'm
using a 7.0 kernel on the Thinkpad X13s (SC8280XP).  The sources are at
https://github.com/steev/linux/tree/lenovo-x13s-linux-7.0.y (with the v5
applied).  PCIE_QCOM is built-in to the kernel.  Not sure what other information
is needed.

>
> - Krishna Chaitanya.
> >
> > -- steev