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[media] adv7842: return 0 if no change in s_dv_timings 

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@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Martin Bugge 2013-12-12 10:10:57 -03:00 committed by Mauro Carvalho Chehab
parent 15058aac06
commit 834a8be156
1 changed files with 5 additions and 0 deletions
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5
drivers/media/i2c/adv7842.c
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@ -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),