iMX8MP with two ov9281: inclk frequency mismatch

[JackLEE_]

Hello Community,

I am trying to connect two OV9281 camera on a custom board with i.MX8MP. I am using Linux kernel version 6.1.22-2.0.0 and have updated the driver (drivers/media/i2c/ov9282.c) for ov9281 reference to kernel version lf-6.6.y .

The device tree that I am using is added below:

/dts-v1/;

#include "imx8mp.dtsi"

&i2c3 {
	clock-frequency = <400000>;
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_i2c3>;
	status = "okay";

	ov9281_0: ov9281_mipi@60 {
		compatible = "ovti,ov9281";
		reg = <0x60>;
		pinctrl-names = "default";
		pinctrl-0 = <&pinctrl_cmosx>;
		clocks = <&clk IMX8MP_CLK_CLKOUT1>;
		clock-names = "xclk";
		assigned-clocks = <&clk IMX8MP_CLK_CLKOUT1>;
		assigned-clock-parents = <&clk IMX8MP_CLK_24M>;
		assigned-clock-rates = <24000000>;
		csi_id = <0>;
		reset-gpios = <&gpio3 10 GPIO_ACTIVE_LOW>;

        /* Power supplies */
        avdd-supply = <&reg_cmos_avdd>;
        dvdd-supply = <&reg_cmos_dvdd>;
        dovdd-supply = <&reg_cmos_dvdd>;

		status = "okay";

		port {
			ov9281_mipi_0_ep: endpoint {
				remote-endpoint = <&mipi_csi0_ep>;
				data-lanes = <1 2>;
				clock-lanes = <0>; 
				link-frequencies = /bits/ 64 <400000000>;
			};
		};
	};

	ov9281_1: ov9281_mipi@10 {
		compatible = "ovti,ov9281";
		reg = <0x10>;
		pinctrl-names = "default";
		pinctrl-0 = <&pinctrl_cmosy>;
		clocks = <&clk IMX8MP_CLK_CLKOUT2>;
		clock-names = "xclk";
		assigned-clocks = <&clk IMX8MP_CLK_CLKOUT2>;
		assigned-clock-parents = <&clk IMX8MP_CLK_24M>;
		assigned-clock-rates = <24000000>;
		csi_id = <1>;
		reset-gpios = <&gpio3 6 GPIO_ACTIVE_LOW>;
		
        /* Power supplies */
        avdd-supply = <&reg_cmos_avdd>;
        dvdd-supply = <&reg_cmos_dvdd>;
        dovdd-supply = <&reg_cmos_dvdd>;
		status = "okay";

		port {
			ov9281_mipi_1_ep: endpoint {
				remote-endpoint = <&mipi_csi1_ep>;
				data-lanes = <1 2>;
				clock-lanes = <0>;
				link-frequencies = /bits/ 64 <400000000>;
			};
		};
	};
};

&mipi_csi_0 {
	#address-cells = <1>;
	#size-cells = <0>;
	status = "okay";

	port@0 {
		reg = <0>;
		mipi_csi0_ep: endpoint {
			remote-endpoint = <&ov9281_mipi_0_ep>;
			data-lanes = <2>;
			csis-hs-settle = <13>;
			csis-clk-settle = <2>;
			csis-wclk;
		};
	};
};

&mipi_csi_1 {
	#address-cells = <1>;
	#size-cells = <0>;
	status = "okay";

	port@1 {
		reg = <1>;
		mipi_csi1_ep: endpoint {
			remote-endpoint = <&ov9281_mipi_1_ep>;
			data-lanes = <2>;
			csis-hs-settle = <13>;
			csis-clk-settle = <2>;
			csis-wclk;
		};
	};
};

&cameradev {
	status = "okay";
};

&isi_0 {
	status = "okay";

	cap_device {
		status = "okay";
	};

	m2m_device {
		status = "okay";
	};
};

&isi_1 {
	status = "okay";

	cap_device {
		status = "okay";
	};

	m2m_device {
		status = "okay";
	};
};

&isp_0 {
	status = "okay";
};

&isp_1 {
	status = "okay";
};

Link to imx8mp-evk.dts 

The following logs appear during boot:

[    1.784109] : mipi_csis_imx8mp_phy_reset, No remote pad found!
[    1.796584] mxc-mipi-csi2-sam 32e40000.csi: lanes: 2, hs_settle: 13, clk_settle: 2, wclk: 1, freq: 500000000
[    1.806689] mxc-mipi-csi2-sam 32e50000.csi: supply mipi-phy not found, using dummy regulator
[    1.815449] : mipi_csis_imx8mp_phy_reset, No remote pad found!
[    1.821338] mxc-mipi-csi2-sam 32e50000.csi: lanes: 2, hs_settle: 13, clk_settle: 2, wclk: 1, freq: 266000000

[    2.166387] clk: failed to reparent clkout1 to osc_24m: -22
[    2.172271] ov9282 2-0060: inclk frequency mismatch
[    2.177163] ov9282 2-0060: HW configuration is not supported
[    2.183050] ov9282: probe of 2-0060 failed with error -22
[    2.189072] clk: failed to reparent clkout2 to osc_24m: -22
[    2.194888] ov9282 2-0010: inclk frequency mismatch
[    2.199775] ov9282 2-0010: HW configuration is not supported
[    2.205643] ov9282: probe of 2-0010 failed with error -22

[    6.853451] ov9281: loading out-of-tree module taints kernel.
[    6.859924] clk: failed to reparent clkout1 to osc_24m: -22
[    6.876005] ov9281 2-0060: Failed to get XVCLK
[    6.880608] ov9281: probe of 2-0060 failed with error -22
[    6.886246] clk: failed to reparent clkout2 to osc_24m: -22
[    6.892126] ov9281 2-0010: Failed to get XVCLK
[    6.897437] ov9281: probe of 2-0010 failed with error -22

The error shows the clock is mismatch, what should i do for getting the right configuration. Both ov9281 pin "XVCLK" are connected to IMX8MP  "CLKOUT1" and "CLKOUT2" in our circuit design.

Any advice for this problem would be greatly appreciated.

[Alejandro_Salas · Accepted solution]

Hello

You can try to refer to this thread: https://community.nxp.com/t5/i-MX-Processors/Enable-CLKOUT1-in-Imx8mp-eval-board/td-p/1694664

There are trying to enable the CLKOUT1.

Your DTS seems to be OK.

Best regards,

--... ...--

Salas.