Re: [PATCH v2 02/18] arm64: dts: ti: k3-j721e-main: Add multiple channels for CSI2RX DMA

[Kumar, Udit]

On 7/13/2026 5:04 PM, Yemike Abhilash Chandra wrote:
> From: Vaishnav Achath <vaishnav.a@xxxxxx>
> 
> J721E CSI2RX SHIM layer can support up to 32 DMA channel contexts. Add
> additional DMA channels to enable multistream support for CSI2RX.
> 

If hardware supports 32 channel, then why you are limiting to 16
channels only ?
> Signed-off-by: Vaishnav Achath <vaishnav.a@xxxxxx>
> Signed-off-by: Yemike Abhilash Chandra <y-abhilashchandra@xxxxxx>
> ---
>  arch/arm64/boot/dts/ti/k3-j721e-main.dtsi | 20 ++++++++++++++++----
>  1 file changed, 16 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> index 5a8414fc5751..b1988437f52d 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
> @@ -600,8 +600,14 @@ ti_csi2rx0: ticsi2rx@4500000 {
>  		ranges;
>  		#address-cells = <2>;
>  		#size-cells = <2>;
> -		dmas = <&main_udmap 0x4940>;
> -		dma-names = "rx0";
> +		dmas = <&main_udmap 0x4940>, <&main_udmap 0x4941>, <&main_udmap 0x4942>,
> +		       <&main_udmap 0x4943>, <&main_udmap 0x4944>, <&main_udmap 0x4945>,
> +		       <&main_udmap 0x4946>, <&main_udmap 0x4947>, <&main_udmap 0x4948>,
> +		       <&main_udmap 0x4949>, <&main_udmap 0x494a>, <&main_udmap 0x494b>,
> +		       <&main_udmap 0x494c>, <&main_udmap 0x494d>, <&main_udmap 0x494e>,
> +		       <&main_udmap 0x494f>;
> +		dma-names = "rx0", "rx1", "rx2", "rx3", "rx4", "rx5", "rx6", "rx7",
> +			    "rx8", "rx9", "rx10", "rx11", "rx12", "rx13", "rx14", "rx15";
>  		power-domains = <&k3_pds 26 TI_SCI_PD_EXCLUSIVE>;
>  		status = "disabled";
>  
> @@ -656,8 +662,14 @@ ti_csi2rx1: ticsi2rx@4510000 {
>  		ranges;
>  		#address-cells = <2>;
>  		#size-cells = <2>;
> -		dmas = <&main_udmap 0x4960>;
> -		dma-names = "rx0";
> +		dmas = <&main_udmap 0x4960>, <&main_udmap 0x4961>, <&main_udmap 0x4962>,
> +		       <&main_udmap 0x4963>, <&main_udmap 0x4964>, <&main_udmap 0x4965>,
> +		       <&main_udmap 0x4966>, <&main_udmap 0x4967>, <&main_udmap 0x4968>,
> +		       <&main_udmap 0x4969>, <&main_udmap 0x496a>, <&main_udmap 0x496b>,
> +		       <&main_udmap 0x496c>, <&main_udmap 0x496d>, <&main_udmap 0x496e>,
> +		       <&main_udmap 0x496f>;
> +		dma-names = "rx0", "rx1", "rx2", "rx3", "rx4", "rx5", "rx6", "rx7",
> +			    "rx8", "rx9", "rx10", "rx11", "rx12", "rx13", "rx14", "rx15";
>  		power-domains = <&k3_pds 27 TI_SCI_PD_EXCLUSIVE>;
>  		status = "disabled";
>