* [PATCH v2] arm64: dts: imx95: Reserve eDMA channels 0-1 for V2X
@ 2026-01-23 10:26 Joy Zou
2026-01-23 14:54 ` Frank Li
0 siblings, 1 reply; 2+ messages in thread
From: Joy Zou @ 2026-01-23 10:26 UTC (permalink / raw)
To: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Shawn Guo,
Sascha Hauer, Pengutronix Kernel Team, Fabio Estevam, Frank Li,
Peng Fan, Ye Li
Cc: devicetree, imx, linux-arm-kernel, linux-kernel,
Laurentiu Mihalcea, Joy Zou
Reserve eDMA channels 0 and 1 on the AXI eDMA controller for exclusive
use by V2X (Vehicle-to-Everything) fast hash operations.
Reviewed-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
Tested-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
Signed-off-by: Joy Zou <joy.zou@nxp.com>
---
Changes in v2:
- modify imx95-19x19-evk-sof.dts dma-channel-mask property.
- add comments for mask channel.
- add Reviewed-by and Tested-by tag, tested on MX95-15x15-FRDM, MX95-19x19-EVK.
- Link to v1: https://lore.kernel.org/r/20260120-b4-imx95-v2x-v1-1-52b2025b27a0@nxp.com
---
arch/arm64/boot/dts/freescale/imx95-19x19-evk-sof.dts | 7 +++++--
arch/arm64/boot/dts/freescale/imx95.dtsi | 2 ++
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/freescale/imx95-19x19-evk-sof.dts b/arch/arm64/boot/dts/freescale/imx95-19x19-evk-sof.dts
index 808a9fe3ebb2b9557be9e428583e76c32517de08..264703f6eef64813d64fe07713cf92fd02fa0778 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 {
};
&edma2 {
- /* channels 30 and 31 reserved for FW usage */
- dma-channel-mask = <0xc0000000>, <0x0>;
+ /*
+ * channels 0 and 1 reserved for V2X fast hash,
+ * channels 30 and 31 reserved for FW usage
+ */
+ dma-channel-mask = <0xc0000003>, <0x0>;
};
&sai3 {
diff --git a/arch/arm64/boot/dts/freescale/imx95.dtsi b/arch/arm64/boot/dts/freescale/imx95.dtsi
index 55e2da094c889fc7c1096d0e36f31ae118d2a982..9ac82da2ff440e08ae8378d7ff830a568d50a354 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 = <0x42000000 0x210000>;
#dma-cells = <3>;
dma-channels = <64>;
+ /* channels 0 and 1 reserved for V2X fast hash */
+ dma-channel-mask = <0x3>;
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@nxp.com>
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v2] arm64: dts: imx95: Reserve eDMA channels 0-1 for V2X
2026-01-23 10:26 [PATCH v2] arm64: dts: imx95: Reserve eDMA channels 0-1 for V2X Joy Zou
@ 2026-01-23 14:54 ` Frank Li
0 siblings, 0 replies; 2+ messages in thread
From: Frank Li @ 2026-01-23 14:54 UTC (permalink / raw)
To: Joy Zou
Cc: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Shawn Guo,
Sascha Hauer, Pengutronix Kernel Team, Fabio Estevam, Peng Fan,
Ye Li, devicetree, imx, linux-arm-kernel, linux-kernel,
Laurentiu Mihalcea
On Fri, Jan 23, 2026 at 06:26:27PM +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.
>
> Reviewed-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
> Tested-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
> Signed-off-by: Joy Zou <joy.zou@nxp.com>
> ---
> Changes in v2:
> - modify imx95-19x19-evk-sof.dts dma-channel-mask property.
> - add comments for mask channel.
> - add Reviewed-by and Tested-by tag, tested on MX95-15x15-FRDM, MX95-19x19-EVK.
> - Link to v1: https://lore.kernel.org/r/20260120-b4-imx95-v2x-v1-1-52b2025b27a0@nxp.com
> ---
> arch/arm64/boot/dts/freescale/imx95-19x19-evk-sof.dts | 7 +++++--
> arch/arm64/boot/dts/freescale/imx95.dtsi | 2 ++
common dtsi and board dts use two patch.
> 2 files changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx95-19x19-evk-sof.dts b/arch/arm64/boot/dts/freescale/imx95-19x19-evk-sof.dts
> index 808a9fe3ebb2b9557be9e428583e76c32517de08..264703f6eef64813d64fe07713cf92fd02fa0778 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 {
> };
>
> &edma2 {
> - /* channels 30 and 31 reserved for FW usage */
> - dma-channel-mask = <0xc0000000>, <0x0>;
> + /*
> + * channels 0 and 1 reserved for V2X fast hash,
> + * channels 30 and 31 reserved for FW usage
> + */
> + dma-channel-mask = <0xc0000003>, <0x0>;
Need add to commit message.
Frank
> };
>
> &sai3 {
> diff --git a/arch/arm64/boot/dts/freescale/imx95.dtsi b/arch/arm64/boot/dts/freescale/imx95.dtsi
> index 55e2da094c889fc7c1096d0e36f31ae118d2a982..9ac82da2ff440e08ae8378d7ff830a568d50a354 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 = <0x42000000 0x210000>;
> #dma-cells = <3>;
> dma-channels = <64>;
> + /* channels 0 and 1 reserved for V2X fast hash */
> + dma-channel-mask = <0x3>;
> 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@nxp.com>
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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