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

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Message-ID: <Z36o31uhQuI5lcH7@lizhi-Precision-Tower-5810>
Date: Wed, 8 Jan 2025 11:33:35 -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 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.

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
> > >
> >
>
>
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