linux-kernel - Re: [PATCH] arm64: dts: imx95: Reserve eDMA channels 0-1 for V2X

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Message-ID: <aW+shmRG/K/T/UjX@lizhi-Precision-Tower-5810>
Date: Tue, 20 Jan 2026 11:25:42 -0500
From: Frank Li <Frank.li@....com>
To: Joy Zou <joy.zou@....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>, Peng Fan <peng.fan@....com>,
	Ye Li <ye.li@....com>, devicetree@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: imx95: Reserve eDMA channels 0-1 for V2X

On Tue, Jan 20, 2026 at 04:35:50PM +0800, Joy Zou wrote:
> Reserve eDMA channels 0 and 1 on the AXI eDMA controller for exclusive
> use by V2X (Vehicle-to-Everything) fast hash operations.
>
> Signed-off-by: Joy Zou <joy.zou@....com>
> ---
> ---
>  arch/arm64/boot/dts/freescale/imx95.dtsi | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx95.dtsi b/arch/arm64/boot/dts/freescale/imx95.dtsi
> index 55e2da094c889fc7c1096d0e36f31ae118d2a982..24d02aa18b2f480bbffdc30bc41c658fb3aaf67a 100644
> --- a/arch/arm64/boot/dts/freescale/imx95.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx95.dtsi
> @@ -631,6 +631,7 @@ edma2: dma-controller@...00000 {
>  				reg = <0x42000000 0x210000>;
>  				#dma-cells = <3>;
>  				dma-channels = <64>;
> +				dma-channel-mask = <0x3>;

Can you add comments here? v2x needn't dt node?

Frank

>  				interrupts = <GIC_SPI 128 IRQ_TYPE_LEVEL_HIGH>,
>  					     <GIC_SPI 128 IRQ_TYPE_LEVEL_HIGH>,
>  					     <GIC_SPI 129 IRQ_TYPE_LEVEL_HIGH>,
>
> ---
> base-commit: d08c85ac8894995d4b0d8fb48d2f6a3e53cd79ab
> change-id: 20260120-b4-imx95-v2x-3e01c7bc6881
>
> Best regards,
> --
> Joy Zou <joy.zou@....com>
>