[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>
diff --git a/drivers/media/video/cx231xx/cx231xx-video.c b/drivers/media/video/cx231xx/cx231xx-video.c
index 21fa547..6e81f97 100644
--- a/drivers/media/video/cx231xx/cx231xx-video.c
+++ b/drivers/media/video/cx231xx/cx231xx-video.c
@@ -1179,7 +1179,8 @@
{
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 @@
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;
}