diff options
| author | Devin Heitmueller <dheitmueller@kernellabs.com> | 2011-07-25 00:07:07 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-07-28 00:56:04 +0400 |
| commit | de99d5328c6d54694471da28711a05adec708c3b (patch) | |
| tree | d05ab3d5e7a77ea9fff901108eea1b1431446cd6 /drivers/media | |
| parent | 44ecf1df9493e6684cd1bb34abb107a0ffe1078a (diff) | |
| download | linux-de99d5328c6d54694471da28711a05adec708c3b.tar.xz | |
[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.c | 15 |
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 21fa54762be7..6e81f970dc7d 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; } |