Support of VirtualChannels with one i2c device

Robotics & Edge Computing Jetson Systems Jetson Orin NX
1

Hi,
We would like to connect a camera with three sensors via MIPI-CSI to an Orin NX board.
The camera configuration is done via I2C and combines the image streams via MIPI virtual channels 0, 1 and 2.
We need a separate V4L device for each virtual channel.

As Nvidia TegraCam seems to support only one virtual channel per device, we have created one real and two dummy I2C devices in the device tree to capture data from all virtual channels.

Do you plan to natively support virtual channels in TegraCam without this workaround?
This would make it possible to define multiple virtual channels for one camera.

We currently using Jetpack 36.4

Thanks!
BR
ToHo

3

Suppose you can do it by checking slave address in the kernel driver.

  1. Register two fake slave address in the dts to register video* node
  2. Check the slave address in the sensor kernel driver to do corresponding setting for different virtual channel.
4

Hi @ShaneCCC ,
that’s how we do it now.
Is there a plan by Nvidia to use virtual channels without this dummy devices?
Thanks
ToHo

5

I don’t think will have plan for some special case.

Thanks