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authorAlan McIvor <alan.mcivor@reveal.co.nz>2012-04-02 04:11:08 +0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-04-11 14:55:35 +0400
commit961e668b3447a73c040181def293cfa875c74738 (patch)
tree1c5fa5e25eedf317dc8afd13e42b2c7ac101c862 /drivers/media
parent9d454d48ebcd9938ac60a245fa545d9db1035f1a (diff)
downloadlinux-961e668b3447a73c040181def293cfa875c74738.tar.xz
[media] Default bt878 contrast value
The default_value for the Bt878 V4L2_CID_CONTRAST control is currently set to 32768. Internally this gets translated to an analog input circuit gain of 1.19. However, the default gain should be 1.0. This patch alters the default value to 27648 which corresponds to a gain of 1.0. It also alters the probe routine so that the correct value is written on board initialisation. [mchehab@redhat.com: behavior confirmed via Fusion 878a datasheet] Signed-off-by: Alan McIvor <alan.mcivor@reveal.co.nz> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/video/bt8xx/bttv-driver.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/media/video/bt8xx/bttv-driver.c b/drivers/media/video/bt8xx/bttv-driver.c
index e581b37be789..a9cfb0f4be48 100644
--- a/drivers/media/video/bt8xx/bttv-driver.c
+++ b/drivers/media/video/bt8xx/bttv-driver.c
@@ -663,7 +663,7 @@ static const struct v4l2_queryctrl bttv_ctls[] = {
.minimum = 0,
.maximum = 65535,
.step = 128,
- .default_value = 32768,
+ .default_value = 27648,
.type = V4L2_CTRL_TYPE_INTEGER,
},{
.id = V4L2_CID_SATURATION,
@@ -4394,7 +4394,7 @@ static int __devinit bttv_probe(struct pci_dev *dev,
if (!bttv_tvcards[btv->c.type].no_video) {
bttv_register_video(btv);
bt848_bright(btv,32768);
- bt848_contrast(btv,32768);
+ bt848_contrast(btv, 27648);
bt848_hue(btv,32768);
bt848_sat(btv,32768);
audio_mute(btv, 1);