On 08/05/2024 17:31, Dave Stevenson wrote:
For reference certainly imx327/290/462 which are all siblings in the
Sony Starvis family do calculate exposure as
exposure = 1 frame period - (SHS1 + 1) * (1H period)
So 0 = max exposure and bigger values are shorter exposure time.
ack
I'm not saying that the imx412 driver is right in doing this as well,
but it seems there is a trend with the Sony Starvis family to program
exposure in this different manner. Don't discount it as wrong for all
drivers!
Understood. For the record the rpi imx477 driver writes the CID value
provided by user-space.
https://github.com/raspberrypi/linux/blob/rpi-6.6.y/drivers/media/i2c/imx477.c#L1376
With an exposure multiplier we don't support upstream at the moment. So,
I think this patch is the right fix after all.
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bod
