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This property uses an inverted bit definition: bit value 0 indicates the channel is available, while bit value 1 indicates unavailable. That was already used widely for i.MX8, i.MX9. Correcting the definition will break backward compatibility. This reversal only impacts the eDMA dts node and driver, and doesn't impact DMA consumer. Therefore, keep the inverted definition. Also add a note at the top of the binding to highlight this inverted definition to prevent confusion. Signed-off-by: Joy Zou Acked-by: Rob Herring (Arm) Reviewed-by: Frank Li --- Documentation/devicetree/bindings/dma/fsl,edma.yaml | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Documentation/devicetree/bindings/dma/fsl,edma.yaml b/Document= ation/devicetree/bindings/dma/fsl,edma.yaml index fa4248e2f1b9cecd00f1535744bfe6d9ecdba613..f609038e35ae1836b89c5b4d8a0= 95b15a882fb87 100644 --- a/Documentation/devicetree/bindings/dma/fsl,edma.yaml +++ b/Documentation/devicetree/bindings/dma/fsl,edma.yaml @@ -12,6 +12,9 @@ description: | DMAMUX0 and DMAMUX1, specific DMA request source can only be multiplexed by any channel of certain group, DMAMUX0 or DMAMUX1, but not both. =20 + This binding has an inverted dma-channel-mask definition compared to + the common DMA binding for historical reasons. + maintainers: - Peng Fan =20 @@ -95,6 +98,12 @@ properties: eDMA are implemented in big endian mode, otherwise in little mode. type: boolean =20 + dma-channel-mask: + description: | + Bitmask of available DMA channels (inverted definition). + Bit semantics: 0 means channel available, 1 means channel unavailable + default: 0 + required: - "#dma-cells" - compatible --=20 2.37.1 From nobody Thu Apr 2 19:02:14 2026 Received: from MRWPR03CU001.outbound.protection.outlook.com (mail-francesouthazon11011003.outbound.protection.outlook.com [40.107.130.3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BEA723559D8; 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Reviewed-by: Laurentiu Mihalcea Tested-by: Laurentiu Mihalcea Signed-off-by: Joy Zou --- arch/arm64/boot/dts/freescale/imx95.dtsi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx95.dtsi b/arch/arm64/boot/dts= /freescale/imx95.dtsi index 55e2da094c889fc7c1096d0e36f31ae118d2a982..9ac82da2ff440e08ae8378d7ff8= 30a568d50a354 100644 --- a/arch/arm64/boot/dts/freescale/imx95.dtsi +++ b/arch/arm64/boot/dts/freescale/imx95.dtsi @@ -631,6 +631,8 @@ edma2: dma-controller@42000000 { reg =3D <0x42000000 0x210000>; #dma-cells =3D <3>; dma-channels =3D <64>; + /* channels 0 and 1 reserved for V2X fast hash */ + dma-channel-mask =3D <0x3>; interrupts =3D , , , --=20 2.37.1 From nobody Thu Apr 2 19:02:14 2026 Received: from AM0PR83CU005.outbound.protection.outlook.com (mail-westeuropeazon11010017.outbound.protection.outlook.com [52.101.69.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1D0DF338581; 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So update the dma-channel-mask from 0xc0000000 to 0xc0000003 to mark channels 0, 1, 30, and 31 as reserved. Signed-off-by: Joy Zou --- arch/arm64/boot/dts/freescale/imx95-19x19-evk-sof.dts | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/freescale/imx95-19x19-evk-sof.dts b/arch/a= rm64/boot/dts/freescale/imx95-19x19-evk-sof.dts index 808a9fe3ebb2b9557be9e428583e76c32517de08..264703f6eef64813d64fe07713c= f92fd02fa0778 100644 --- a/arch/arm64/boot/dts/freescale/imx95-19x19-evk-sof.dts +++ b/arch/arm64/boot/dts/freescale/imx95-19x19-evk-sof.dts @@ -55,8 +55,11 @@ sound-wm8962 { }; =20 &edma2 { - /* channels 30 and 31 reserved for FW usage */ - dma-channel-mask =3D <0xc0000000>, <0x0>; + /* + * channels 0 and 1 reserved for V2X fast hash, + * channels 30 and 31 reserved for FW usage + */ + dma-channel-mask =3D <0xc0000003>, <0x0>; }; =20 &sai3 { --=20 2.37.1