Autodetect input's standard using field frequency detection
feature (FIDT in status byte at 0x1F) of the chips saa7111/
saa7111a/saa7113/saa7114/saa7118.
Signed-off-by: Anatolij Gustschin <agust@xxxxxxx>
---
Changes since first patch version:
- reworked for chips other than saa7115
- fixed to return V4L2_STD_525_60 / V4L2_STD_625_50
instead of V4L2_STD_NTSC / V4L2_STD_PAL
- adapted the commit message
drivers/media/video/saa7115.c | 11 ++++++++++-
1 files changed, 10 insertions(+), 1 deletions(-)
diff --git a/drivers/media/video/saa7115.c b/drivers/media/video/saa7115.c
index 301c62b..f35459d 100644
--- a/drivers/media/video/saa7115.c
+++ b/drivers/media/video/saa7115.c
@@ -1348,8 +1348,17 @@ static int saa711x_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
int reg1e;
*std = V4L2_STD_ALL;
- if (state->ident != V4L2_IDENT_SAA7115)
+ if (state->ident != V4L2_IDENT_SAA7115) {
+ int reg1f = saa711x_read(sd, R_1F_STATUS_BYTE_2_VD_DEC);
+
+ if (reg1f & 0x20)
+ *std = V4L2_STD_525_60;
+ else
+ *std = V4L2_STD_625_50;
+
return 0;
+ }
+
reg1e = saa711x_read(sd, R_1E_STATUS_BYTE_1_VD_DEC);
switch (reg1e & 0x03) {
--
1.7.1
--
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