Is it possible to output HDR imagery over the MIPI interface (IMX327S/IMX385/IMX462) or do we need to do it inside our own fpga?
These 2 modules support DOL HDR inside. You can enable this function via shell script.
Is the I2C command set open, such that we could do the camera module configuration from our baremetal application?
Yes, the I2C toolkit is open source.
Can you confirm my understanding that in this case our FPGA will be talking to the onboard ISP chip on your camera board over I2C, and not directly to the camera.
YES. Directly to ISP and my FPGA, not to sensor.
Roughly how much is the added latency due to your onboard ISP on the boards?
60-80ms I think. Because DOL WDR and 3D denoise functions.
The auto exposure and white balance will be handled by the onboard ISP, and will not need to be handled by our FPGA, correct?