int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
s64 min, s64 max, u64 step, s64 def)
{
- bool changed;
+ bool value_changed;
+ bool range_changed = false;
int ret;
lockdep_assert_held(ctrl->handler->lock);
default:
return -EINVAL;
}
- ctrl->minimum = min;
- ctrl->maximum = max;
- ctrl->step = step;
- ctrl->default_value = def;
+ if ((ctrl->minimum != min) || (ctrl->maximum != max) ||
+ (ctrl->step != step) || ctrl->default_value != def) {
+ range_changed = true;
+ ctrl->minimum = min;
+ ctrl->maximum = max;
+ ctrl->step = step;
+ ctrl->default_value = def;
+ }
cur_to_new(ctrl);
if (validate_new(ctrl, ctrl->p_new)) {
if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
}
if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
- changed = *ctrl->p_new.p_s64 != *ctrl->p_cur.p_s64;
+ value_changed = *ctrl->p_new.p_s64 != *ctrl->p_cur.p_s64;
else
- changed = *ctrl->p_new.p_s32 != *ctrl->p_cur.p_s32;
- if (changed)
+ value_changed = *ctrl->p_new.p_s32 != *ctrl->p_cur.p_s32;
+ if (value_changed)
ret = set_ctrl(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
- else
+ else if (range_changed)
send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
return ret;
}