How is the VI working to convert 10-bit RAW10 to 16-bit?

I’m using 8 cameras and grabing images through v4l2 in my program, when I coped with the images got from v4l2, I found that the images had been converted to 16-bit while the CSI-2 signal from my cameras is 10-bit RAW10, it seems that VI in Xavier has converted it yet, how is it working to convert the 10-bit signal? Can I configure it to get 10-bit images without the conversion?

Please have a check the 'RAW Memory Formats" in the TRM to know the detail.