From: Vladimir Barinov <vladimir.barinov@xxxxxxxxxxxxxxxxxx>
When the input signal is not detected querystd() method should return
V4L2_STD_UNKNOWN instead of previously latched analog video standard.
Signed-off-by: Vladimir Barinov <vladimir.barinov@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
---
Changes since original posting:
- fixed the driver name in the subject.
drivers/media/i2c/adv7180.c | 4 ++++
1 file changed, 4 insertions(+)
Index: linux/drivers/media/i2c/adv7180.c
===================================================================
--- linux.orig/drivers/media/i2c/adv7180.c
+++ linux/drivers/media/i2c/adv7180.c
@@ -135,6 +135,10 @@ struct adv7180_state {
static v4l2_std_id adv7180_std_to_v4l2(u8 status1)
{
+ /* in case V4L2_IN_ST_NO_SIGNAL */
+ if (!(status1 & ADV7180_STATUS1_IN_LOCK))
+ return V4L2_STD_UNKNOWN;
+
switch (status1 & ADV7180_STATUS1_AUTOD_MASK) {
case ADV7180_STATUS1_AUTOD_NTSM_M_J:
return V4L2_STD_NTSC;
--
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