linux-kernel - Re: [PATCH v6 0/4] PCI: Add support for resetting the Root Ports in a platform specific way

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Message-ID: <aNKkI00EAJb8LD9S@fedora>
Date: Tue, 23 Sep 2025 15:46:37 +0200
From: Niklas Cassel <cassel@...nel.org>
To: David Bremner <david@...hera.net>
Cc: devnull+manivannan.sadhasivam.oss.qualcomm.com@...nel.org,
	bhelgaas@...gle.com, heiko@...ech.de,
	krishna.chundru@....qualcomm.com, kwilczynski@...nel.org,
	linux-arm-kernel@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-rockchip@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org,
	lpieralisi@...nel.org, lukas@...ner.de, mahesh@...ux.ibm.com,
	mani@...nel.org, manivannan.sadhasivam@....qualcomm.com,
	oohall@...il.com, p.zabel@...gutronix.de, robh@...nel.org,
	wilfred.mallawa@....com, will@...nel.org
Subject: Re: [PATCH v6 0/4] PCI: Add support for resetting the Root Ports in
 a platform specific way

Hello David,

On Tue, Sep 23, 2025 at 10:06:13AM -0300, David Bremner wrote:
> 
> I have been testing this series on the 6.17 pre-releases, lightly
> patched by the collabora [1] and mnt-reform [2] teams. I have been testing
> on bare hardware, on MNT Research's pocket-reform product. I'm afraid I
> can only offer CI level feedback, but in case it helps
> 
> 1) The series now applies cleanly onto collabora's rockchip-devel branch
> 2) The resulting kernel boots and runs OK.
> 3) the resulting kernel still fails the "platform" pm_test [3] with
>  "rockchip-dw-pcie a40c00000.pcie: Phy link never came up"
> 
> Of course there could be other reasons for (3), I don't know that much
> about it.

I don't think this driver has support for hibernate in upstream.

Did you try forward porting this patch:
https://lore.kernel.org/linux-pci/1744940759-23823-1-git-send-email-shawn.lin@rock-chips.com/

Also, have you tried the downstream driver?
If it is working there, perhaps you could try to isolate the changes
that make it work there.

Otherwise, I would recommend you to reach out to author of the patch
above ask for support.


Kind regards,
Niklas