Custom MIPI CSI camera driver missing

[jetuser]

Hi,

I made a custom MIPI camera driver for Jetson TX2i, the driver was loading and I used to get the following output:

vte-developer@vtedeveloper-desktop:~$ v4l2-ctl --list-formats-ext
ioctl: VIDIOC_ENUM_FMT
	Index       : 0
	Type        : Video Capture
	Pixel Format: 'RG10'
	Name        : 10-bit Bayer RGRG/GBGB
		Size: Discrete 3264x2464
			Interval: Discrete 0.048s (21.000 fps)

However, today, when I checked, I don’t get any output

vte-developer@vtedeveloper-desktop:~$ v4l2-ctl --list-formats-ext
Failed to open /dev/video0: No such file or directory
vte-developer@vtedeveloper-desktop:~$ v4l2-ctl --list-devices
Failed to open /dev/video0: No such file or directory
vte-developer@vtedeveloper-desktop:~$ 

Further, dmesg also dose not show the driver getting loaded:

vte-developer@vtedeveloper-desktop:~$ dmesg | grep ov5693
vte-developer@vtedeveloper-desktop:~$ 

I have used sudo apt-get upgrade recently while installing opencv and other things to access a USB camera, did that cause it?

How can i force to load my custom driver at the time of boot?

[ShaneCCC]

Looks like the upgrade command override the device tree to disable your sensor. You may need to restore the driver and device tree again.

Thanks

[jetuser]

Hi @ShaneCCC ,

How do i do that? Do i have to flash again?

Ia there any other way?

[ShaneCCC]

I don’t think so.
Suppose the default system image don’t have your sensor driver configure.
Do what your do to enable the camera at first.

[jetuser]

Hi @ShaneCCC,

@ShaneCCC

Do what your do to enable the camera at first.

I am sorry, I don’t follow. What should I do? How do I enable this driver?

Note: I have written a custom driver based on ov5693 and the driver gets loaded whenever Jetson boots.

[ShaneCCC]

How about the device tree?

[jetuser]

How do I update it again? Do you mean to say that it has changed now? I just disassembled the dtb file to check and I can see my modified device tree there:

tegra-camera-platform {
		compatible = "nvidia, tegra-camera-platform";
		num_csi_lanes = <0x2>;
		max_lane_speed = <0x16e360>;
		min_bits_per_pixel = <0xa>;
		vi_peak_byte_per_pixel = <0x2>;
		vi_bw_margin_pct = <0x19>;
		max_pixel_rate = <0x27100>;
		isp_peak_byte_per_pixel = <0x5>;
		isp_bw_margin_pct = <0x19>;

		modules {

			module0 {
				status = "okay";
				badge = "e3326_front_TIDRVR";
				position = "rear";
				orientation = [31 00];

				drivernode0 {
					status = "okay";
					pcl_id = "v4l2_sensor";
					devname = "ov5693 2-0036";
					proc-device-tree = "/proc/device-tree/i2c@3180000/ov5693_c@36";
				};

				drivernode1 {
					status = "disabled";
					pcl_id = "v4l2_lens";
					proc-device-tree = "/proc/device-tree/e3326_lens_ov5693@P5V27C/";
				};
			};
		};
	};

I used sudo dtc -I dtb -O dts -o temp.dts kernel_tegra186-quill-p3489-1000-a00-00-ucm1.dtb as Jetson boots from kernel dtb.

[ShaneCCC]

Did you confirm the system apply your device tree correctly?
Dump the device tree to confirm it.

sudo dtc -I fs -O dts -o extracted_proc.dts /proc/device-tree