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Subject: [media] Default bt878 contrast value Author: Alan McIvor <[email protected]> Date: Sun Apr 1 21:11:08 2012 -0300 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. [[email protected]: behavior confirmed via Fusion 878a datasheet] Signed-off-by: Alan McIvor <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]> drivers/media/video/bt8xx/bttv-driver.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) --- http://git.linuxtv.org/media_tree.git?a=commitdiff;h=961e668b3447a73c040181def293cfa875c74738 diff --git a/drivers/media/video/bt8xx/bttv-driver.c b/drivers/media/video/bt8xx/bttv-driver.c index e581b37..a9cfb0f 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); _______________________________________________ linuxtv-commits mailing list [email protected] http://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
