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Commit 46ccdafa authored by Hans de Goede's avatar Hans de Goede Committed by Mauro Carvalho Chehab
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V4L/DVB (8198): gspca: Frame decoding errors when PAC207 in full daylight. 



Signed-off-by: default avatarHans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: default avatarJean-Francois Moine <moinejf@free.fr>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
parent ab8f12cf

drivers/media/video/gspca/pac207.c

+10 −2
Original line number Diff line number Diff line
@@ -40,9 +40,17 @@ MODULE_LICENSE("GPL"); 
#define PAC207_BRIGHTNESS_MAX		255

#define PAC207_BRIGHTNESS_DEFAULT	4 /* power on default: 4 */



#define PAC207_EXPOSURE_MIN		4

/* An exposure value of 4 also works (3 does not) but then we need to lower

   the compression balance setting when in 352x288 mode, otherwise the usb

   bandwidth is not enough and packets get dropped resulting in corrupt

   frames. The problem with this is that when the compression balance gets

   lowered below 0x80, the pac207 starts using a different compression

   algorithm for some lines, these lines get prefixed with a 0x2dd2 prefix

   and currently we do not know how to decompress these lines, so for now

   we use a minimum exposure value of 5 */

#define PAC207_EXPOSURE_MIN		5

#define PAC207_EXPOSURE_MAX		26

#define PAC207_EXPOSURE_DEFAULT		4 /* power on default: 3 ?? */

#define PAC207_EXPOSURE_DEFAULT		5 /* power on default: 3 ?? */

#define PAC207_EXPOSURE_KNEE		11 /* 4 = 30 fps, 11 = 8, 15 = 6 */



#define PAC207_GAIN_MIN			0