linux-kernel - Re: [PATCH 2/5] arm64: dts: imx8ulp: Add CSI and ISI Nodes

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Message-ID: <aJtrrJZCHJfqsMBy@lizhi-Precision-Tower-5810>
Date: Tue, 12 Aug 2025 12:28:28 -0400
From: Frank Li <Frank.li@....com>
To: guoniu.zhou@....nxp.com
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, rmfrfs@...il.com,
	laurent.pinchart@...asonboard.com, martink@...teo.de,
	kernel@...i.sm, mchehab@...nel.org, robh@...nel.org,
	krzk+dt@...nel.org, conor+dt@...nel.org, shawnguo@...nel.org,
	s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com
Subject: Re: [PATCH 2/5] arm64: dts: imx8ulp: Add CSI and ISI Nodes

On Tue, Aug 12, 2025 at 04:19:23PM +0800, guoniu.zhou@....nxp.com wrote:
> From: Guoniu Zhou <guoniu.zhou@....com>
>
> The CSI-2 in the i.MX8ULP is almost identical to the version present
> in the i.MX8QXP/QM and is routed to the ISI. Add both the ISI and CSI
> nodes and mark them as disabled by default since capture is dependent
> on an attached camera.
>
> Signed-off-by: Guoniu Zhou <guoniu.zhou@....com>
> ---

suppose dts is last patch because binding and driver will be pickup by
media maintainer first, then shawn pick up dts part.

Reviewed-by: Frank Li <Frank.Li@....com>

>  arch/arm64/boot/dts/freescale/imx8ulp.dtsi | 67 ++++++++++++++++++++++
>  1 file changed, 67 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8ulp.dtsi b/arch/arm64/boot/dts/freescale/imx8ulp.dtsi
> index 2562a35286c2..71abc2a3d505 100644
> --- a/arch/arm64/boot/dts/freescale/imx8ulp.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8ulp.dtsi
> @@ -7,6 +7,7 @@
>  #include <dt-bindings/gpio/gpio.h>
>  #include <dt-bindings/interrupt-controller/arm-gic.h>
>  #include <dt-bindings/power/imx8ulp-power.h>
> +#include <dt-bindings/reset/imx8ulp-pcc-reset.h>
>  #include <dt-bindings/thermal/thermal.h>
>
>  #include "imx8ulp-pinfunc.h"
> @@ -840,6 +841,72 @@ spdif: spdif@...b0000 {
>  				dma-names = "rx", "tx";
>  				status = "disabled";
>  			};
> +
> +			isi: isi@...c0000 {
> +				compatible = "fsl,imx8ulp-isi";
> +				reg = <0x2dac0000 0x10000>;
> +				interrupts = <GIC_SPI 119 IRQ_TYPE_LEVEL_HIGH>;
> +				clocks = <&pcc5 IMX8ULP_CLK_ISI>,
> +					 <&cgc2 IMX8ULP_CLK_LPAV_AXI_DIV>;
> +				clock-names = "axi", "apb";
> +				power-domains = <&scmi_devpd IMX8ULP_PD_ISI>;
> +				status = "disabled";
> +
> +				ports {
> +					#address-cells = <1>;
> +					#size-cells = <0>;
> +
> +					port@0 {
> +						reg = <0>;
> +						isi_in: endpoint {
> +							remote-endpoint = <&mipi_csi_out>;
> +						};
> +					};
> +				};
> +			};
> +
> +			mipi_csi: csi@...f0000 {
> +				compatible = "fsl,imx8ulp-mipi-csi2";
> +				reg = <0x2daf0000 0x10000>,
> +				      <0x2dad0000 0x10000>;
> +				clocks = <&pcc5 IMX8ULP_CLK_CSI>,
> +					 <&pcc5 IMX8ULP_CLK_CSI_CLK_ESC>,
> +					 <&pcc5 IMX8ULP_CLK_CSI_CLK_UI>,
> +					 <&pcc5 IMX8ULP_CLK_CSI_REGS>;
> +				clock-names = "core", "esc", "ui", "pclk";
> +				assigned-clocks = <&pcc5 IMX8ULP_CLK_CSI>,
> +						  <&pcc5 IMX8ULP_CLK_CSI_CLK_ESC>,
> +						  <&pcc5 IMX8ULP_CLK_CSI_CLK_UI>,
> +						  <&pcc5 IMX8ULP_CLK_CSI_REGS>;
> +				assigned-clock-parents = <&cgc2 IMX8ULP_CLK_PLL4_PFD1_DIV1>,
> +							 <&cgc2 IMX8ULP_CLK_PLL4_PFD1_DIV2>,
> +							 <&cgc2 IMX8ULP_CLK_PLL4_PFD0_DIV1>;
> +				assigned-clock-rates = <200000000>,
> +						       <80000000>,
> +						       <100000000>,
> +						       <79200000>;
> +				power-domains = <&scmi_devpd IMX8ULP_PD_MIPI_CSI>;
> +				resets = <&pcc5 PCC5_CSI_SWRST>,
> +					 <&pcc5 PCC5_CSI_REGS_SWRST>;
> +				status = "disabled";
> +
> +				ports {
> +					#address-cells = <1>;
> +					#size-cells = <0>;
> +
> +					port@0 {
> +						reg = <0>;
> +					};
> +
> +					port@1 {
> +						reg = <1>;
> +
> +						mipi_csi_out: endpoint {
> +							remote-endpoint = <&isi_in>;
> +						};
> +					};
> +				};
> +			};
>  		};
>
>  		gpiod: gpio@...00000 {
> --
> 2.34.1
>