PCI: qcom: Add D3cold support

[Manivannan Sadhasivam]

On Mon, May 04, 2026 at 12:36:29PM +0530, Krishna Chaitanya Chundru wrote:
> 
> 
> On 5/4/2026 9:44 AM, Steev Klimaszewski wrote:
> > 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.
> Hi Steev,
> 
> I made mistake in re basing the code, can you try below and see if that fixes
> your issue.
> I will send this in next patch series.
> 
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -1327,7 +1327,7 @@ static enum dw_pcie_ltssm qcom_pcie_get_ltssm(struct
> dw_pcie *pci)
>         struct qcom_pcie *pcie = to_qcom_pcie(pci);
>         u32 val;
> 
> -       if (pcie->cfg->ops->ltssm_enable)
> +       if (pcie->cfg->ops->get_ltssm)
>                 return pcie->cfg->ops->get_ltssm(pcie);

Squashed this change while applying.

- Mani

-- 
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