Camera bridges hardware components

Applicable for

STM32MP13x lines, STM32MP15x lines, STM32MP21x lines, STM32MP23x lines, STM32MP25x lines

1. Article purpose[edit | edit source]↑

The purpose of this article is to:

List the camera bridges hardware components that might be integrated in the different boards.
Link these components to the corresponding software framework(s).
Point to the appropriate component datasheets.
Explain, when necessary, how to configure these components.

Information

Some of these hardware components are part of the accessories for STM32 boards.

2. Software frameworks[edit | edit source]↑

Domain	Peripheral	Software components			Comment
Domain	Peripheral	OP-TEE	Linux	STM32Cube	Comment
Visual	STMicroelectronics STMIPID02		V4L2 camera framework		MIPI^® CSI-2 to SMIA CCP2 de-serializer camera bridge

3. STMicroelectronics STMIPID02[edit | edit source]↑

The STMicroelectronics STMIPID02 camera bridge is dual mode MIPI^® CSI-2 / SMIA CCP2 deserializer.

For details and the datasheet please contact STMicroelectronics.

Information

This camera bridge can be found on some STM32MP13 Discovery kits.

Note: Refer to the application note STM32MP135 line interfacing with a MIPI® CSI-2 camera (AN5478) for more details.

3.1. Linux driver[edit | edit source]↑

Bindings: Documentation/devicetree/bindings/media/i2c/st,st-mipid02.yaml

Sources: drivers/media/i2c/st-mipid02.c

Click here to show the example

Device tree example: arch/arm/boot/dts/st/stm32mp135f-dk.dts

/ {
...
&dcmipp {
	status = "okay";
	pinctrl-names = "default", "sleep";
	pinctrl-0 = <&dcmipp_pins_a>;
	pinctrl-1 = <&dcmipp_sleep_pins_a>;
	port {
		dcmipp_0: endpoint {
			remote-endpoint = <&mipid02_2>;
			bus-width = <8>;
			hsync-active = <0>;
			vsync-active = <0>;
			pclk-sample = <0>;
			pclk-max-frequency = <120000000>;
		};
	};
};
...
&i2c5 {
	pinctrl-names = "default", "sleep";
	pinctrl-0 = <&i2c5_pins_a>;
	pinctrl-1 = <&i2c5_sleep_pins_a>;
	i2c-scl-rising-time-ns = <170>;
	i2c-scl-falling-time-ns = <5>;
	clock-frequency = <400000>;
	status = "okay";
	/* spare dmas for other usage */
	/delete-property/dmas;
	/delete-property/dma-names;

	stmipi: stmipi@14 {
		compatible = "st,st-mipid02";
		reg = <0x14>;
		status = "okay";
		clocks = <&clk_mco1>;
		clock-names = "xclk";
		VDDE-supply = <&scmi_v1v8_periph>;
		VDDIN-supply = <&scmi_v1v8_periph>;
		reset-gpios = <&mcp23017 2 (GPIO_ACTIVE_LOW | GPIO_PUSH_PULL)>;

		ports {
			#address-cells = <1>;
			#size-cells = <0>;
			port@0 {
				reg = <0>;

				mipid02_0: endpoint {
					data-lanes = <1 2>;
					lane-polarities = <0 0 0>;
					remote-endpoint = <&gc2145_ep>;
				};
			};
			port@2 {
				reg = <2>;

				mipid02_2: endpoint {
					bus-width = <8>;
					hsync-active = <0>;
					vsync-active = <0>;
					pclk-sample = <0>;
					remote-endpoint = <&dcmipp_0>;
				};
			};
		};
	};

	gc2145: gc2145@3c {
		compatible = "galaxycore,gc2145";
		reg = <0x3c>;
		clocks = <&clk_ext_camera>;
		iovdd-supply = <&scmi_v3v3_sw>;
		avdd-supply = <&scmi_v3v3_sw>;
		dvdd-supply = <&scmi_v3v3_sw>;
		powerdown-gpios = <&mcp23017 3 (GPIO_ACTIVE_LOW | GPIO_PUSH_PULL)>;
		reset-gpios = <&mcp23017 4 (GPIO_ACTIVE_LOW | GPIO_PUSH_PULL)>;
		status = "okay";

		port {
			gc2145_ep: endpoint {
				remote-endpoint = <&mipid02_0>;
				clock-lanes = <0>;
				data-lanes = <1 2>;
				link-frequencies = /bits/ 64 <120000000 192000000 240000000>;
			};
		};
	};

	ov5640: camera@3c {
		compatible = "ovti,ov5640";
		reg = <0x3c>;
		clocks = <&clk_ext_camera>;
		clock-names = "xclk";
		DOVDD-supply = <&scmi_v3v3_sw>;
		status = "disabled";
		powerdown-gpios = <&mcp23017 3 (GPIO_ACTIVE_LOW | GPIO_PUSH_PULL)>;
		reset-gpios = <&mcp23017 4 (GPIO_ACTIVE_LOW | GPIO_PUSH_PULL)>;

		port {
			ov5640_0: endpoint {
				/*remote-endpoint = <&mipid02_0>;*/
				clock-lanes = <0>;
				data-lanes = <1 2>;
			};
		};
	};
...

Camera bridges hardware components

Contents↑

1. Article purpose[edit | edit source]↑

2. Software frameworks[edit | edit source]↑

3. STMicroelectronics STMIPID02[edit | edit source]↑

3.1. Linux driver[edit | edit source]↑

4. To go further[edit | edit source]↑