linux-kernel - Re: [PATCH 2/4] arm64: dts: ti: k3-am62p: Add DMASS1 for CSI

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Date: Mon, 12 Feb 2024 17:35:03 +0530
From: Vaishnav Achath <vaishnav.a@...com>
To: Jai Luthra <j-luthra@...com>, Nishanth Menon <nm@...com>,
        Vignesh
 Raghavendra <vigneshr@...com>,
        Tero Kristo <kristo@...nel.org>, Rob Herring
	<robh+dt@...nel.org>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, Andrew Davis <afd@...com>,
        Bryan Brattlof <bb@...com>, Dhruva Gole
	<d-gole@...com>
CC: <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Devarsh Thakkar <devarsht@...com>,
        Aradhya
 Bhatia <a-bhatia1@...com>
Subject: Re: [PATCH 2/4] arm64: dts: ti: k3-am62p: Add DMASS1 for CSI



On 01/02/24 18:37, Jai Luthra wrote:
> On AM62P, CSI-RX uses a dedicated BCDMA instance (DMASS1) for
> transferring captured camera frames to DDR, so enable it.
> 
> Signed-off-by: Jai Luthra <j-luthra@...com>
> ---
>   arch/arm64/boot/dts/ti/k3-am62p-main.dtsi | 37 +++++++++++++++++++++++++++++++
>   1 file changed, 37 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi
> index 4c51bae06b57..57ec4ef334e4 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi
> @@ -158,6 +158,43 @@ main_pktdma: dma-controller@...c0000 {
>   		};
>   	};
>   
> +	dmss_csi: bus@...00000 {
> +		compatible = "simple-bus";
> +		ranges = <0x00 0x4e000000 0x00 0x4e000000 0x00 0x408000>;
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		dma-ranges;
> +		ti,sci-dev-id = <198>;
> +
> +		inta_main_dmss_csi: interrupt-controller@...00000 {
> +			compatible = "ti,sci-inta";
> +			reg = <0x00 0x4e400000 0x00 0x8000>;
> +			#interrupt-cells = <0>;
> +			interrupt-controller;
> +			interrupt-parent = <&gic500>;
> +			msi-controller;
> +			power-domains = <&k3_pds 182 TI_SCI_PD_EXCLUSIVE>;
> +			ti,sci = <&dmsc>;
> +			ti,sci-dev-id = <200>;
> +			ti,interrupt-ranges = <0 237 8>;
> +			ti,unmapped-event-sources = <&main_bcdma_csi>;
> +		};
> +
> +		main_bcdma_csi: dma-controller@...30000 {
> +			compatible = "ti,am62a-dmss-bcdma-csirx";
> +			reg = <0x00 0x4e230000 0x00 0x100>,
> +			      <0x00 0x4e180000 0x00 0x8000>,
> +			      <0x00 0x4e100000 0x00 0x10000>;
> +			reg-names = "gcfg", "rchanrt", "ringrt";
> +			#dma-cells = <3>;
> +			msi-parent = <&inta_main_dmss_csi>;
> +			power-domains = <&k3_pds 182 TI_SCI_PD_EXCLUSIVE>;
> +			ti,sci = <&dmsc>;
> +			ti,sci-dev-id = <199>;
> +			ti,sci-rm-range-rchan = <0x21>;
> +		};
> +	};

Reviewed-by: Vaishnav Achath <vaishnav.a@...com>

> +
>   	dmsc: system-controller@...43000 {
>   		compatible = "ti,k2g-sci";
>   		ti,host-id = <12>;
>