From: Florian Echtler <floe@butterbrot.org>
To: linux-media@vger.kernel.org
Cc: modin@yuri.at, benjamin.tissoires@redhat.com, hans.verkuil@cisco.com
Subject: [RFC] [sur40] mapping of sensor parameters to V4L2?
Date: Tue, 3 Jan 2017 13:57:45 +0100 (CET) [thread overview]
Message-ID: <alpine.DEB.2.10.1701031346040.18874@butterbrot> (raw)
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 ...
Thanks & best regards, Florian
--
"_Nothing_ brightens up my morning. Coffee simply provides a shade of
grey just above the pitch-black of the infinite depths of the _abyss_."
next reply other threads:[~2017-01-03 13:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-03 12:57 Florian Echtler [this message]
2017-01-09 14:57 ` [RFC] [sur40] mapping of sensor parameters to V4L2? Hans Verkuil
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