[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 <[email protected]>
Signed-off-by: Antti Palosaari <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
diff --git a/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c b/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c
index 141fc8b..b09f7d8 100644
--- a/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c
+++ b/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c
@@ -1322,8 +1322,16 @@
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;
