Failed to get SensorTimestamp from controls on raspberry pi 5

[shuanglengyunji]

I am trying to get sensor timestamp with the following code:

let timestamp = req.controls().get::<libcamera::controls::SensorTimestamp>().expect("Failed to get sensor timestamp");

This works on PC, while it errors out with a ControlError::NotFound(C::ID) error. Error message:

thread '<unnamed>' panicked at src/input_generator/libcamera.rs:243:26:
Failed to get sensor timestamp: NotFound(32)

This make me thinking of how the number 32 is generated and if raspberry pi's libcamera build have a different index of it.

I would be greatly appreciative for any ideas and directions I can dig in.

Thanks,
Han