Re: [PATCH v1 1/1] arm64: dts: qcom: hamoa: Move PCIe PERST and Wake GPIOs to port nodes

[Bjorn Andersson <andersson@kernel.org>]

On Mon, Mar 16, 2026 at 08:50:12AM +0530, Manivannan Sadhasivam wrote:
> On Sun, Mar 15, 2026 at 09:53:33PM -0500, Bjorn Andersson wrote:
> > On Sat, Mar 14, 2026 at 07:50:50PM +0530, Manivannan Sadhasivam wrote:
> > > On Fri, Mar 13, 2026 at 11:45:42AM -0500, Bjorn Helgaas wrote:
> > > > On Fri, Mar 13, 2026 at 05:46:18PM +0800, Ziyue Zhang wrote:
> > > > > Commit 960609b22be5 ("arm64: dts: qcom: hamoa: Move PHY, PERST, and Wake
> > > > > GPIOs to PCIe port nodes and add port Nodes for all PCIe ports") did not
> > > > > convert all Hamoa‑based platforms to the new method of defining PERST and
> > > > > Wake GPIOs in the PCIe root port nodes.
> > > > > 
> > > > > Without the change PCIe probe will fail. The probe failure happens because
> > > > > the PHY stays in the controller node while the PERST/Wake GPIOs were moved
> > > > > to the port nodes.
> > > > > 
> > > > > This fixes probe failures seen on the following platforms:
> > > > >  - x1-hp-omnibook-x14
> > > > >  - x1-microsoft-denali
> > > > >  - x1e80100-lenovo-yoga-slim7x
> > > > >  - x1e80100-medion-sprchrgd-14-s1
> > > > >  - x1p42100-lenovo-thinkbook-16
> > > > >  - x1-asus-zenbook-a14
> > > > >  - x1-crd
> > > > >  - x1-dell-thena
> > > > > 
> > > > > Fixes: 960609b22be5 ("arm64: dts: qcom: hamoa: Move PHY, PERST, and Wake GPIOs to PCIe port nodes and add port Nodes for all PCIe ports")
> > > > 
> > > > Are you saying that DTs in the field broke because of some kernel
> > > > change?  That's not supposed to happen.  Even though PHY, PERST, and
> > > > Wake GPIOs should be described in Root Port nodes instead of the Root
> > > > Complex node in *future* DTs, the kernel is still supposed to accept
> > > > the old style with them described in the Root Complex node.
> > > > 
> > > 
> > > This is not related to the driver change. The driver correctly parses all Root
> > > Port properties either in the Root Complex node (old binding) or Root Port node
> > > (new binding). But commit 960609b22be5, left converting mentioned board DTS to
> > > the new binding, leaving those affected platforms in a half baked state i.e.,
> > > some properties in RC node and some in Root Port node. Driver cannot parse such
> > > combinations, so it fails correctly so.
> > > 
> > 
> > Are you saying that above listed machines has broken PCIe support in
> > v7.0-rc?
> > 
> 
> I haven't verified it, but I'm pretty sure PCIe is broken on these platforms.
> 

In line with Bjorn's request, we shouldn't have to guess.

> > It seems this is a (partial) revert of 960609b22be5, is this actually
> > fixing that change, or is it only applicable once some other changes are
> > applied?
> > 
> 
> This change is fixing the issue in the respective board DTS and is a standalone
> fix on top of v7.0-rc1.
> 

So 960609b22be5 was broken when I merged it?

The commit message says that the commit was incomplete, in that it
didn't fully convert from the old to the new style, so it sounds like
the offending commit was incomplete - but I believe the offending commit
was a workaround for the new solution not being in place and this commit
mostly reverts the changes in the offending commit.

In other words, it's not clear to me, from the commit message, why this
change is a -rc fix. Perhaps the author of the offending commit tricked
me to merge that one, and that's what's being fixed?

Also, is the lack of Tested-by telling us that nobody has tested any of
the v7.0-rc on the 8 listed Hamoa devices?



If it's actually needed, can we please have the commit message improved
so that we can merge it into -rc?

Regards,
Bjorn

> > Where should this be merged?
> > 
> 
> Qcom tree for 7.0-rcX.
> 
> - Mani
> 
> -- 
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