Metadata retrieval

1.Which seller did you purchase the product(s) from?
2.The Model number of the product(s) you have purchased?
Camarray – Arducam 2MP*2 Stereo Camera MIPI Module
3.Which Platform are you using the product(s) on?
Raspberry PI 4B 8GB
4.Which instruction are you following?

5.Has your product ever worked properly?
6.What problems are you experiencing?

I’m using the 2MP OV2311 stereo camera module with kernel 5.4.79 and the arducam/bcm2835-unicam modules. Based on the arducamstill code I’m able to retrieve the video data, which works quite well (very low cpu load). However, I was wondering if it is also possible to also get the metadata for a frame.

It looks like bcm2835-unicam is already able to retrieve metadata for other sensors. I’ve tried to add the metadata pad in arducam.c/.ko, but I don’t seem to get any metadata via v4l2.
7.What attempts at troubleshooting have you already made?

8.How would you like us to help you?
Can you provide a driver which supports retrieving metadata?