From ea4d04f92c97c7986dfc363655f9c4143d35c2b9 Mon Sep 17 00:00:00 2001 From: Antti Palosaari Date: Mon, 10 Mar 2014 14:28:45 -0300 Subject: [PATCH] [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 Signed-off-by: Antti Palosaari Signed-off-by: Mauro Carvalho Chehab --- drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c b/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c index 141fc8b428ba..b09f7d8c12cf 100644 --- a/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c +++ b/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c @@ -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; -- 2.20.1