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From: Hans de Goede <j.w.r.degoede@hhs.nl>
To: Jean-Francois Moine <moinejf@free.fr>
Cc: video4linux-list@redhat.com
Subject: PATCH: gspca-sn9c102-sensor-gain.patch
Date: Wed, 09 Jul 2008 23:14:53 +0200	[thread overview]
Message-ID: <48752A4D.7050800@hhs.nl> (raw)

Hi,

Currently the sn9c102 gain control, only controls the digital gain in the
sn9c102, but most sensors have an analog gain in the sensor, allowing for a
much wider sensitivity range.

This patch adds support for the sensor gain for the tas5110 and ov6650 sensors.
Note that both gains are controlled with a single v4l2 ctrl, as they are both
gain. The ctrl now hs a range of 0-511, raising it one step at a time, will
first raise the sensor gain 1 one its 0-255 scale and then the next step will
raise the bridge gain on its 0-255 scale. Note that the bridge really has a
0-15 scale, so it only gets raised once every 32 steps
(of the full 0-511 scale).

This patch combined with the configurable exposure and autoexposure patch,
makes my 2 sn9c102 cams work well in a wide variety of lighting conditions.

Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>

Regards,

Hans

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             reply	other threads:[~2008-07-09 22:09 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-07-09 21:14 Hans de Goede [this message]
  -- strict thread matches above, loose matches on Subject: below --
2008-07-10  8:06 PATCH: gspca-sn9c102-sensor-gain.patch Hans de Goede

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