linux-kernel - Re: [PATCH 0/1] arm64: dts: rockchip: rk3568: Move PCIe3 MSI to use GIC ITS

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Message-Id: <D9RSA5K547DD.1LYPIZZM4XALS@cknow.org>
Date: Fri, 09 May 2025 18:51:21 +0200
From: "Diederik de Haas" <didi.debian@...ow.org>
To: "Diederik de Haas" <didi.debian@...ow.org>, "Chukun Pan"
 <amadeus@....edu.cn>, "Heiko Stuebner" <heiko@...ech.de>
Cc: "Conor Dooley" <conor+dt@...nel.org>, "Krzysztof Kozlowski"
 <krzk+dt@...nel.org>, "Dragan Simic" <dsimic@...jaro.org>, "Rob Herring"
 <robh@...nel.org>, <linux-arm-kernel@...ts.infradead.org>,
 <linux-rockchip@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
 <devicetree@...r.kernel.org>
Subject: Re: [PATCH 0/1] arm64: dts: rockchip: rk3568: Move PCIe3 MSI to use
 GIC ITS

Hi again,

On Fri May 9, 2025 at 5:34 PM CEST, Diederik de Haas wrote:
> On Sat Mar 8, 2025 at 10:30 AM CET, Chukun Pan wrote:
>> For a long time, rk3568's MSI-X had bugs and could only work on one node.
>> e.g. [    7.250882] r8125 0002:01:00.0: no MSI/MSI-X. Back to INTx.
>>
>> Following commit b956c9de9175 ("arm64: dts: rockchip: rk356x: Move
>> PCIe MSI to use GIC ITS instead of MBI"), change the PCIe3 controller's
>> MSI on rk3568 to use ITS, so that all MSI-X can work properly.
>>
> I tested this patch on my NanoPi R5S with a 6.15-rc3 kernel + a number
> of [vcc|phy]-supply patches that have been accepted for 6.16 (and a
> small WIP LED patch).
>
> With this patch I get the following kernel warnings:
>
> pci 0001:10:00.0: Primary bus is hard wired to 0
> pci 0002:20:00.0: Primary bus is hard wired to 0
>
> If I 'unapply' this patch, I don't see those warnings.

I was pretty sure I had seen those messages before, but couldn't find
them before. But now I have: on my rk3588-rock-5b.

> It's possible that this patch only brought a(nother) problem to light,

So it looks indeed to be this.

Cheers,
  Diederik

>> Chukun Pan (1):
>>   arm64: dts: rockchip: rk3568: Move PCIe3 MSI to use GIC ITS
>>
>>  arch/arm64/boot/dts/rockchip/rk3568.dtsi | 8 ++++----
>>  1 file changed, 4 insertions(+), 4 deletions(-)


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