From: Javier Martin Date: Tue, 30 Oct 2012 15:04:23 +0000 (-0300) Subject: [media] media: ov7670: Allow 32x maximum gain for yuv422 X-Git-Tag: firefly_0821_release~3680^2~275^2~540 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c01b7429e2b713a3d039cd2b1a94dc1b97cdf321;p=firefly-linux-kernel-4.4.55.git [media] media: ov7670: Allow 32x maximum gain for yuv422 4x gain ceiling is not enough to capture a decent image in conditions of total darkness and only a LED light source. Allow a maximum gain of 32x instead. This doesn't have any drawback since the image quality in 'normal' light conditions is the same. Signed-off-by: Javier Martin Acked-by: Jonathan Corbet Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c index e7c82b297514..882ddf6f66d3 100644 --- a/drivers/media/i2c/ov7670.c +++ b/drivers/media/i2c/ov7670.c @@ -353,7 +353,7 @@ static struct regval_list ov7670_fmt_yuv422[] = { { REG_RGB444, 0 }, /* No RGB444 please */ { REG_COM1, 0 }, /* CCIR601 */ { REG_COM15, COM15_R00FF }, - { REG_COM9, 0x18 }, /* 4x gain ceiling; 0x8 is reserved bit */ + { REG_COM9, 0x48 }, /* 32x gain ceiling; 0x8 is reserved bit */ { 0x4f, 0x80 }, /* "matrix coefficient 1" */ { 0x50, 0x80 }, /* "matrix coefficient 2" */ { 0x51, 0 }, /* vb */