diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2009-10-11 12:22:29 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-12-05 23:40:32 +0300 |
| commit | d76f975c574230fb00d07848d330e04d97e51475 (patch) | |
| tree | d9ef5cd5acf8af4e6cae0d1cfb33dc6920e939c5 | |
| parent | 205260102c5cef4180982eec88aaeb6934faf214 (diff) | |
| download | linux-d76f975c574230fb00d07848d330e04d97e51475.tar.xz | |
V4L/DVB (13142): gspca_mr97310a: small tweak to CIF sensor type 1 exposure setting
The CIF sensor type 1 exposure setting got clamped at 300, as settings below
300 do not work well (and do work for the other sensors). This patch
scales the 0-4095 range to 300-4095 instead of ignoring changes between
300, avoiding have a part of the control range where nothing happens.
This is esp. important for software autogain as done by libv4l.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/video/gspca/mr97310a.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/media/video/gspca/mr97310a.c b/drivers/media/video/gspca/mr97310a.c index abc56e37efcb..f282f8000701 100644 --- a/drivers/media/video/gspca/mr97310a.c +++ b/drivers/media/video/gspca/mr97310a.c @@ -842,8 +842,9 @@ static void setexposure(struct gspca_dev *gspca_dev) return; if (sd->cam_type == CAM_TYPE_CIF && sd->sensor_type == 1) { - /* This cam does not like very low exposure settings */ - exposure = (sd->exposure < 300) ? 300 : sd->exposure; + /* This cam does not like exposure settings > 300, + so scale 0 - 4095 to 300 - 4095 */ + exposure = (sd->exposure * 9267) / 10000 + 300; sensor_write1(gspca_dev, 3, exposure >> 4); sensor_write1(gspca_dev, 4, exposure & 0x0f); } else { |