From: Martin Bugge <marbugge@xxxxxxxxx>
Return 0 if the new timings are equal to the current timings as
it caused extra cp-loss/lock interrupts.
Signed-off-by: Martin Bugge <marbugge@xxxxxxxxx>
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
drivers/media/i2c/adv7842.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/media/i2c/adv7842.c b/drivers/media/i2c/adv7842.c
index ba74863..c697117 100644
--- a/drivers/media/i2c/adv7842.c
+++ b/drivers/media/i2c/adv7842.c
@@ -1453,6 +1453,11 @@ static int adv7842_s_dv_timings(struct v4l2_subdev *sd,
if (state->mode == ADV7842_MODE_SDP)
return -ENODATA;
+ if (v4l2_match_dv_timings(&state->timings, timings, 0)) {
+ v4l2_dbg(1, debug, sd, "%s: no change\n", __func__);
+ return 0;
+ }
+
bt = &timings->bt;
if (!v4l2_valid_dv_timings(timings, adv7842_get_dv_timings_cap(sd),
--
1.8.4.4
--
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