Hi.
I am trying to operate camera in Jetson TX2 module.
But driver could not probe the device.
The camera have MIPI interface and sensor model is ov2311.
L4T version is 32.3.1.
Linux kernel version is 4.9.
Linux distribution version is ubuntu 18.04.
Device driver is provided by camera manufacturer.
And kernel and dts(i) files were patched by the manufacturer.
I configured KGDB with this manual.
Loaded symbols from ov2311.ko.
Set breakpoint in ov2311_probe() function.
After boot-time, I execute modprobe ov2311 command.
But kernel didn’t stop on ov2311_probe() function.
Additional information.
Kernel compilation configs:
Kernel is compiled in -O1 option.
CONFIG_DEBUG_INFO=y
CONFIG_VIDEO_ECAM=y
CONFIG_INPUT_LSM6DS3=y
CONFIG_KGDB=y
CONFIG_KGDB_SERIAL_CONSOLE=y
CONFIG_KGDB_KDB=n
This is device tree.
i2c@c250000 {
...
ov2311_a@42 {
status = "okay";
compatible = "nvidia,ov2311";
This is kernel log related to camera.
But there is no log related to ov2311_probe() function.
[ 0.460686] GPIO line 461 (camera-control-output-low) hogged as output/low
[ 0.460712] GPIO line 456 (camera-control-output-low) hogged as output/low
[ 0.460736] GPIO line 457 (camera-control-output-low) hogged as output/low
[ 0.460760] GPIO line 426 (camera-control-output-low) hogged as output/low
...
[ 1.115874] tegra_camera_platform tegra-camera-platform: tegra_camera_probe:camera_platform_driver probe
[ 1.116127] misc tegra_camera_ctrl: tegra_camera_isomgr_register tpg_max_iso = 3916800KBs
[ 1.116139] misc tegra_camera_ctrl: tegra_camera_isomgr_register isp_iso_bw=4687500, vi_iso_bw=2000000, max_bw=4687500
There is no /dev/video<n> file in device file directory.
Maybe probe() function was not called during modprobe.
Why probe() was not called during modprobe?
Is the function already called before modprobe? In that case, how can I debug it with KGDB?