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authorDevin Heitmueller <dheitmueller@kernellabs.com>2011-07-24 17:07:07 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-07-27 17:56:04 -0300
commitde99d5328c6d54694471da28711a05adec708c3b (patch)
treed05ab3d5e7a77ea9fff901108eea1b1431446cd6 /drivers/media
parent44ecf1df9493e6684cd1bb34abb107a0ffe1078a (diff)
[media] cx231xx: Provide signal lock status in G_INPUT
Make use of the signal state registers to properly populate the signal lock registers in the cx231xx driver. This allows applications to know whether there is a signal present even in devices which lack a tuner (since such apps typically won't call G_TUNER if no tuner is present). [mchehab@redhat.com: Fix CodingStyle: don't use {} for one-line if's] Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/video/cx231xx/cx231xx-video.c15
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/media/video/cx231xx/cx231xx-video.c b/drivers/media/video/cx231xx/cx231xx-video.c
index 21fa54762be..6e81f970dc7 100644
--- a/drivers/media/video/cx231xx/cx231xx-video.c
+++ b/drivers/media/video/cx231xx/cx231xx-video.c
@@ -1179,7 +1179,8 @@ static int vidioc_enum_input(struct file *file, void *priv,
{
struct cx231xx_fh *fh = priv;
struct cx231xx *dev = fh->dev;
- unsigned int n;
+ u32 gen_stat;
+ unsigned int ret, n;
n = i->index;
if (n >= MAX_CX231XX_INPUT)
@@ -1198,6 +1199,18 @@ static int vidioc_enum_input(struct file *file, void *priv,
i->std = dev->vdev->tvnorms;
+ /* If they are asking about the active input, read signal status */
+ if (n == dev->video_input) {
+ ret = cx231xx_read_i2c_data(dev, VID_BLK_I2C_ADDRESS,
+ GEN_STAT, 2, &gen_stat, 4);
+ if (ret > 0) {
+ if ((gen_stat & FLD_VPRES) == 0x00)
+ i->status |= V4L2_IN_ST_NO_SIGNAL;
+ if ((gen_stat & FLD_HLOCK) == 0x00)
+ i->status |= V4L2_IN_ST_NO_H_LOCK;
+ }
+ }
+
return 0;
}