linux-kernel - Re: [PATCH v2 1/2] arm64: dts: ti: k3-j721s2-main: Add BCDMA instance for CSI2RX

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Message-ID: <8924b1b8-82ac-4d6d-8063-71ee3ce839c6@ti.com>
Date:   Thu, 12 Oct 2023 11:48:31 +0530
From:   Jayesh Choudhary <j-choudhary@...com>
To:     Vaishnav Achath <vaishnav.a@...com>, <nm@...com>,
        <vigneshr@...com>, <kristo@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>
CC:     <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <u-kumar1@...com>
Subject: Re: [PATCH v2 1/2] arm64: dts: ti: k3-j721s2-main: Add BCDMA instance
 for CSI2RX



On 10/10/23 16:47, Vaishnav Achath wrote:
> J721S2 has a dedicated BCDMA controller for the Camera Serial Interface.
> Events from the BCDMA controller instance are routed through the
> main UDMA interrupt aggregator as unmapped events. Add the node for
> the DMA controller and keep it disabled by default.
> 
> See J721S2 Technical Reference Manual (SPRUJ28)
> for further details: http://www.ti.com/lit/pdf/spruj28
> 
> Signed-off-by: Vaishnav Achath <vaishnav.a@...com>
> ---
> 
> V1->V2:
>      * Fix indentation for the reg entries.
> 
>   arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi | 17 +++++++++++++++++
>   1 file changed, 17 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
> index 6d32544c8881..d5d13d61ade3 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
> @@ -807,6 +807,7 @@
>   			ti,sci = <&sms>;
>   			ti,sci-dev-id = <265>;
>   			ti,interrupt-ranges = <0 0 256>;
> +			ti,unmapped-event-sources = <&main_bcdma_csi>;
>   		};
>   
>   		secure_proxy_main: mailbox@...00000 {
> @@ -1103,6 +1104,22 @@
>   			ti,sci-rm-range-rflow = <0x00>; /* GP RFLOW */
>   		};
>   
> +		main_bcdma_csi: dma-controller@...a0000 {
> +			compatible = "ti,j721s2-dmss-bcdma-csi";
> +			reg = <0x00 0x311a0000 0x00 0x100>,
> +			      <0x00 0x35d00000 0x00 0x20000>,
> +			      <0x00 0x35c00000 0x00 0x10000>,
> +			      <0x00 0x35e00000 0x00 0x80000>;
> +			reg-names = "gcfg", "rchanrt", "tchanrt", "ringrt";
> +			msi-parent = <&main_udmass_inta>;
> +			#dma-cells = <3>;
> +			ti,sci = <&sms>;
> +			ti,sci-dev-id = <225>;
> +			ti,sci-rm-range-rchan = <0x21>;
> +			ti,sci-rm-range-tchan = <0x22>;
> +			status = "disabled";
> +		};
> +

Reviewed-by: Jayesh Choudhary <j-choudhary@...com>

Warm Regards.


>   		cpts@...d0000 {
>   			compatible = "ti,j721e-cpts";
>   			reg = <0x0 0x310d0000 0x0 0x400>;