linux-kernel - Re: [PATCH 1/5] arm64: dts: imx8-ss-hsio: Wire up DMA IRQ for PCIe

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Message-ID: <Z7yxDRO+ICPCu0I2@lizhi-Precision-Tower-5810>
Date: Mon, 24 Feb 2025 12:49:01 -0500
From: Frank Li <Frank.li@....com>
To: Alexander Stein <alexander.stein@...tq-group.com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, devicetree@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux@...tq-group.com
Subject: Re: [PATCH 1/5] arm64: dts: imx8-ss-hsio: Wire up DMA IRQ for PCIe

On Wed, Jan 08, 2025 at 11:33:35AM -0500, Frank Li wrote:
> On Wed, Jan 08, 2025 at 10:58:18AM +0100, Alexander Stein wrote:
> > Hi Frank,
> >
> > Am Dienstag, 7. Januar 2025, 16:39:25 CET schrieb Frank Li:
> > > On Tue, Jan 07, 2025 at 03:01:06PM +0100, Alexander Stein wrote:
> > > > IRQ mapping is already present. Add the missing DMA interrupt.
> > >
> > > PCI host side have not use bridge's DMA yet although hardware support it.
> >
> > So this is a driver limitation, right? So IMHO the device description is
> > independent from that and still correct, right?
>
> Yes, but dma register space may missed also. I suggest add later after
> EP side support merged, which can verify informaiton is correct.
>
> Anyway, I don't block this change.


Did you run DTB_CHECK? I found new warning was added

/home/lizhi/source/linux-upstream-dts/arch/arm64/boot/dts/freescale/imx8dx-colibri-aster.dtb: pcie@...10000: interrupts: [[0, 102, 4], [0, 104, 4]] is too long
        from schema $id: http://devicetree.org/schemas/pci/fsl,imx6q-pcie.yaml#
/home/lizhi/source/linux-upstream-dts/arch/arm64/boot/dts/freescale/imx8dx-colibri-aster.dtb: pcie@...10000: interrupt-names: ['msi', 'dma'] is too long
        from schema $id: http://devicetree.org/schemas/pci/fsl,imx6q-pcie.yaml#
/home/lizhi/source/linux-upstream-dts/arch/arm64/boot/dts/freescale/imx8dx-colibri-eval-v3.dtb: pcie@...10000: interrupts: [[0, 102, 4], [0, 104, 4]] is too long
        from schema $id: http://devicetree.org/schemas/pci/fsl,imx6q-pcie.yaml#
/home/lizhi/source/linux-upstream-dts/arch/arm64/boot/dts/freescale/imx8dx-colibri-eval-v3.dtb: pcie@...10000: interrupt-names: ['msi', 'dma'] is too long
        from schema $id: http://devicetree.org/schemas/pci/fsl,imx6q-pcie.yaml#
/home/lizhi/source/linux-upstream-dts/arch/arm64/boot/dts/freescale/imx8dx-colibri-iris.dtb: pcie@...10000: interrupts: [[0, 102, 4], [0, 104, 4]] is too long
        from schema $id: http://devicetree.org/schemas/pci/fsl,imx6q-pcie.yaml#
/home/lizhi/source/linux-upstream-dts/arch/arm64/boot/dts/freescale/imx8dx-colibri-iris.dtb: pcie@...10000: interrupt-names: ['msi', 'dma'] is too long

...

Frank

>
> Frank
>
> >
> > Best regards,
> > Alexander
> >
> > > >
> > > > Signed-off-by: Alexander Stein <alexander.stein@...tq-group.com>
> > > > ---
> > > >  arch/arm64/boot/dts/freescale/imx8-ss-hsio.dtsi | 5 +++--
> > > >  1 file changed, 3 insertions(+), 2 deletions(-)
> > > >
> > > > diff --git a/arch/arm64/boot/dts/freescale/imx8-ss-hsio.dtsi b/arch/arm64/boot/dts/freescale/imx8-ss-hsio.dtsi
> > > > index 70a8aa1a67911..4bdfc15487cbc 100644
> > > > --- a/arch/arm64/boot/dts/freescale/imx8-ss-hsio.dtsi
> > > > +++ b/arch/arm64/boot/dts/freescale/imx8-ss-hsio.dtsi
> > > > @@ -57,8 +57,9 @@ pcieb: pcie@...10000 {
> > > >  		ranges = <0x81000000 0 0x00000000 0x8ff80000 0 0x00010000>,
> > > >  			 <0x82000000 0 0x80000000 0x80000000 0 0x0ff00000>;
> > > >  		#interrupt-cells = <1>;
> > > > -		interrupts = <GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>;
> > > > -		interrupt-names = "msi";
> > > > +		interrupts = <GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>,
> > > > +			     <GIC_SPI 104 IRQ_TYPE_LEVEL_HIGH>;
> > > > +		interrupt-names = "msi", "dma";
> > > >  		#address-cells = <3>;
> > > >  		#size-cells = <2>;
> > > >  		clocks = <&pcieb_lpcg IMX_LPCG_CLK_6>,
> > > > --
> > > > 2.34.1
> > > >
> > >
> >
> >
> > --
> > TQ-Systems GmbH | Mühlstraße 2, Gut Delling | 82229 Seefeld, Germany
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> >
> >