Hello Community,
I am trying to connect an OV9281 camera to a custom System-on-Module containing an i.MX93 (Compulab UCM-iMX93). I am using Linux kernel version 6.1.22 and I am compiling the driver included in the kernel source (drivers/media/i2c/ov9282.c) as a built-in module by adding CONFIG_VIDEO_OV9282=y to the kernel configuration.
The device tree that I am using is added below:
/dts-v1/;
#include "ucm-imx93.dtsi" // (includes NXP's imx93.dtsi)
#include "ucm-imx93-lvds.dtsi"
&cameradev {
status = "okay";
};
&isi_0 {
status = "okay";
cap_device {
status = "okay";
};
};
&lpi2c3 {
sensor_ov9281: camera@60 {
compatible = "ovti,ov9281";
reg = <0x60>;
clocks = <&clk IMX93_CLK_MIPI_PHY_CFG>;
reset-gpios=<&pca9555 11 GPIO_ACTIVE_HIGH>;
status="okay";
port {
ov9281_ep: endpoint {
remote-endpoint = <&mipi_csi_ep>;
data-lanes = <1 2>;
clock-lanes = <0>;
link-frequencies = /bits/ 64 <400000000>;
};
};
};
};
&mipi_csi {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
port@0 {
reg = <0>;
mipi_csi_ep: endpoint {
remote-endpoint = <&ov9281_ep>;
data-lanes = <2>;
cfg-clk-range = <28>;
hs-clk-range = <0x2b>;
bus-type = <4>;
};
};
};
Link to ucm-imx93.dtsi
Link to ucm-imx93-lvds.dtsi
The following logs appear during boot:
[ 2.022852] mxc-isi 4ae40000.isi: mxc_isi.0 registered successfully
[ 2.030292] mx8-img-md: Registered mxc_isi.0.capture as /dev/video0
[ 2.042583] mxc-md 42800000.bus:camera: deferring csi device registration
[ 2.050356] dwc-mipi-csi2-host 4ae00000.csi: lanes: 2, name: mxc-mipi-csi2.0
[ 2.744418] mx8-img-md: Registered mxc_isi.0.capture as /dev/video0
[ 2.755665] mx8-img-md: Can't find i2c client device for camera@60
[ 2.762004] mx8-img-md: Unregistered all entities
The error "Can't find i2c client device" appears to come from the kernel module "imx8_media_dev". After boot, no V4L2 subdevice nodes are created under /dev/.
What are some possible reasons why this error might occur, and am I looking in the right place for troubleshooting the V4L2 problem ?
Any advice for troubleshooting this problem would be greatly appreciated.
