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[media] rtl2832_sdr: clamp bandwidth to nearest legal value in automode 

Clamp bandwidth to nearest legal value in automode in order to pass
v4l2-compliance test.

Reported-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Antti Palosaari 2014-03-10 14:28:45 -03:00 committed by Mauro Carvalho Chehab
parent bc9087549e
commit ea4d04f92c
1 changed files with 10 additions and 2 deletions
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12
drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c
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@ -1322,8 +1322,16 @@ static int rtl2832_sdr_s_ctrl(struct v4l2_ctrl *ctrl)
switch (ctrl->id) {
case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
case V4L2_CID_RF_TUNER_BANDWIDTH:
if (s->bandwidth_auto->val)
s->bandwidth->val = s->f_adc;
/* TODO: these controls should be moved to tuner drivers */
if (s->bandwidth_auto->val) {
/* Round towards the closest legal value */
s32 val = s->f_adc + s->bandwidth->step / 2;
u32 offset;
val = clamp(val, s->bandwidth->minimum, s->bandwidth->maximum);
offset = val - s->bandwidth->minimum;
offset = s->bandwidth->step * (offset / s->bandwidth->step);
s->bandwidth->val = s->bandwidth->minimum + offset;
}
c->bandwidth_hz = s->bandwidth->val;