On 01/03/2017 01:57 PM, Florian Echtler wrote: > Hi everyone, > > next chapter in the neverending story of reverse-engineering the SUR40: > > I've identified a couple of internal LCD panel registers which control > some aspects of the built-in image sensor. In particular, these are called > "Video Voltage", "Video Bias", and "IR Illumination Level". > > Now, I have two questions: > > - Video Voltage & Bias seem to affect the sensor gain. Does anyone with > extensive background knowledge of image sensors want to venture a guess > what the exact relation is? My own interpretation would be that Video > Voltage is the actual amplifier gain and Video Bias is the black level... > > - Is there a sensible mapping of these values to V4L2 controls? Should I > pick something from the USER class, or from CAMERA, or FLASH, or ... I think it would be best to add a control class for touch device and add these controls there. It's pretty specific to such devices, so that would make sense. Regards, Hans -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
