ERROR CameraSensor camera_sensor.cpp:127 No image format found

[deva seetharam]

Greetings!!

For a new image sensor (due to a restrictive NDA, cannot reveal the manufacturer or the part number), I have to create the device tree source file and the kernel driver. I have compiled and installed the device tree and kernel module. I see the kernel module is getting loaded and the overlay is getting accepted into device tree. However, when I run libcamera, I get the following error:

[0:00:41.253567807] [1920] ERROR CameraSensor camera_sensor.cpp:127 'xyz123 10-0036': No image format found
[0:00:41.253599677] [1920] ERROR RPI vc4.cpp:216 Failed to register camera xyz123 10-0036: -22

Please suggest how this error can be fixed. Thank you!

I am also including the dts file, (relevant portions of) lsmod and dmesg outputs.


the device tree overlay file is as follows:
<pre>
/dts-v1/;
/plugin/;


#include <dt-bindings/gpio/gpio.h>


/ {
    compatible = "brcm,bcm2835";


    fragment at 0 {
        target = <&i2c0if>;
        __overlay__ {
            status = "okay";
        };
    };


    clk_frag: fragment at 1 {
        target = <&cam1_clk>;
        __overlay__ {
            status = "okay";
            clock-frequency = <24000000>;
        };
    };


    i2c_frag: fragment at 100 {
        target = <&i2c_csi_dsi>;
        __overlay__ {
            #address-cells = <1>;
            #size-cells = <0>;
            status = "okay";


            xyz123: xyz123 at 36 {
                compatible = "abc,xyz123";
                reg = <0x36>;


                clocks = <&cam1_clk>;
                clock-names = "xclk";


                port {
                    cam_endpoint: endpoint {
                        clock-lanes = <0>;
                        data-lanes = <1 2>;
                        clock-noncontinuous;
                        link-frequencies = /bits/ 64 <192000000>;
                    };
                };
            };
        };
    };


    csi_frag: fragment at 101 {
        target = <&csi1>;
        csi: __overlay__ {
            status = "okay";
            brcm,media-controller;


            port {
                csi_ep: endpoint {
                    remote-endpoint = <&cam_endpoint>;
                    clock-lanes = <0>;
                    data-lanes = <1 2>;
                    clock-noncontinuous;
                };
            };
        };
    };


};


&xyz123 {
    status = "okay";
    default-width = <720>;
    default-height = <720>;
};


&cam_endpoint {
    remote-endpoint = <&csi_ep>;
};



the output of lsmod is as follows:
<pre>
xyz123                24576  1
v4l2_fwnode            24576  2 xyz123,bcm2835_unicam
v4l2_async             24576  3 v4l2_fwnode,xyz123,bcm2835_unicam
videodev              278528  10 v4l2_async,bcm2835_codec,xyz123,videobuf2_v4l2,bcm2835_unicam,bcm2835_v4l2,videobuf2_common,rpivid_hevc,v4l2_mem2mem,bcm2835_isp
mc                     61440  10 v4l2_async,videodev,bcm2835_codec,xyz123,videobuf2_v4l2,bcm2835_unicam,videobuf2_common,rpivid_hevc,v4l2_mem2mem,bcm2835_isp

</pre>

the output of dmesg is as follows:
[Sat Mar  9 15:58:15 2024] xyz123: loading out-of-tree module taints kernel.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_probe has been invoked to probe xyz123.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: allocated memory for xyz123.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_check_hwcfg has been invoked to check xyz123 hardware config.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: number of csi lanes: 2.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_power_on has been invoked to power xyz123 up.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_write_registers has been invoked with number of registers set to: 03
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_write_register has been invoked with address: 0103
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_write_register has been invoked with address: 3205
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_write_register has been invoked with address: 0100
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_write_register has been invoked with address: 3205
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_identify_module has been invoked to identify xyz123.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_read_register has been invoked with address: 0x302A
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_read_register prepared a I2C write message with: addr: 0x36, flags: 0x00, len: 0x02
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_read_register prepared a I2C read message with: addr: 0x36, flags: 0x01, len: 0x01
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: chip id first byte matches: 4 == 4
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_read_register has been invoked with address: 0x302B
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_read_register prepared a I2C write message with: addr: 0x36, flags: 0x00, len: 0x02
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_read_register prepared a I2C read message with: addr: 0x36, flags: 0x01, len: 0x01
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: chip id second byte matches: 28 == 28
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_init_ctrls has been invoked to initialize controls of xyz123.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_init_ctrls succesfully initialized controls
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: default pixel rate of xyz123: 10804320.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: current link frequency of xyz123: 192000000.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: default vblank of xyz123: 8.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: default hblank of xyz123: 8.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: Default width specified in device tree: 720
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: Default height specified in device tree: 720
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_set_default_format has been invoked to set default format of xyz123.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_set_default_format has set code to 12295.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_set_default_format has set colorspace to 8.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_set_default_format has set ycbcr_enc to 1.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_set_default_format has set quantization to 1.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_set_default_format has set xfer_func to 2.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_set_default_format has set width to 720.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_set_default_format has set height to 720.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_set_default_format has set field to 1.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_set_default_format has completed.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_probe has initialized media entity pads for xyz123 to 0 and 2.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_probe has registered the subdevice of xyz123.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_probe has completed probing xyz123.
[Sat Mar  9 15:58:15 2024] xyz123 10-0036: xyz123_power_off has been invoked to power xyz123 down.
[Sat Mar  9 15:58:17 2024] xyz123 10-0036: Consider updating driver xyz123 to match on endpoints
[Sat Mar  9 15:58:19 2024] xyz123 10-0036: xyz123_open has been invoked to open xyz123.
[Sat Mar  9 15:58:19 2024] xyz123 10-0036: xyz123_get_format_code has been invoked to get format code of xyz123.
[Sat Mar  9 15:58:19 2024] xyz123 10-0036: h_flip: 0, v_flip: 0, code_index: 0 and 12295 of xyz123.
[Sat Mar  9 15:58:22 2024] xyz123 10-0036: xyz123_open has been invoked to open xyz123.
[Sat Mar  9 15:58:22 2024] xyz123 10-0036: xyz123_get_format_code has been invoked to get format code of xyz123.
[Sat Mar  9 15:58:22 2024] xyz123 10-0036: h_flip: 0, v_flip: 0, code_index: 0 and 12295 of xyz123.
[Sat Mar  9 15:58:22 2024] xyz123 10-0036: xyz123_enum_mbus_code has been invoked.
[Sat Mar  9 15:58:22 2024] xyz123 10-0036: In xyz123_enum_mbus_code, code-> index has reached limit: 0.
[Sat Mar  9 15:58:24 2024] xyz123 10-0036: xyz123_enum_mbus_code has been invoked.
[Sat Mar  9 15:58:24 2024] xyz123 10-0036: In xyz123_enum_mbus_code, code-> index has reached limit: 0.
[Sat Mar  9 15:58:24 2024] xyz123 10-0036: xyz123_enum_mbus_code has been invoked.
[Sat Mar  9 15:58:24 2024] xyz123 10-0036: In xyz123_enum_mbus_code, code-> index has reached limit: 0.
[Sat Mar  9 15:58:32 2024] xyz123 10-0036: xyz123_open has been invoked to open xyz123.
[Sat Mar  9 15:58:32 2024] xyz123 10-0036: xyz123_get_format_code has been invoked to get format code of xyz123.
[Sat Mar  9 15:58:32 2024] xyz123 10-0036: h_flip: 0, v_flip: 0, code_index: 0 and 12295 of xyz123.
[Sat Mar  9 15:58:32 2024] xyz123 10-0036: xyz123_enum_mbus_code has been invoked.
[Sat Mar  9 15:58:32 2024] xyz123 10-0036: In xyz123_enum_mbus_code, code-> index has reached limit: 0.
[Sat Mar  9 15:58:33 2024] xyz123 10-0036: xyz123_enum_mbus_code has been invoked.
[Sat Mar  9 15:58:33 2024] xyz123 10-0036: In xyz123_enum_mbus_code, code-> index has reached limit: 0.
[Sat Mar  9 15:58:33 2024] xyz123 10-0036: xyz123_enum_mbus_code has been invoked.
[Sat Mar  9 15:58:33 2024] xyz123 10-0036: In xyz123_enum_mbus_code, code-> index has reached limit: 0.
[Sat Mar  9 15:58:51 2024] xyz123 10-0036: xyz123_open has been invoked to open xyz123.
[Sat Mar  9 15:58:51 2024] xyz123 10-0036: xyz123_get_format_code has been invoked to get format code of xyz123.
[Sat Mar  9 15:58:51 2024] xyz123 10-0036: h_flip: 0, v_flip: 0, code_index: 0 and 12295 of xyz123.
[Sat Mar  9 15:58:51 2024] xyz123 10-0036: xyz123_enum_mbus_code has been invoked.
[Sat Mar  9 15:58:51 2024] xyz123 10-0036: In xyz123_enum_mbus_code, code-> index has reached limit: 0.