V4L/DVB (9314): s5h1411: Perform s5h1411 soft reset after tuning

If you instruct the tuner to change frequencies, it can take up to 2500ms to
get a demod lock.  By performing a soft reset after the tuning call (which
is consistent with how the Pinnacle 801e Windows driver behaves), you get
a demod lock inside of 300ms

Signed-off-by: Devin Heitmueller <devin.heitmueller@gmail.com>
Reviewed-by: Michael Krufky <mkrufky@linuxtv.org>
Acked-by: Steven Toth <stoth@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/media/dvb/frontends/s5h1411.c b/drivers/media/dvb/frontends/s5h1411.c
index e328d88bcbd4..40e0fedf381e 100644
--- a/drivers/media/dvb/frontends/s5h1411.c
+++ b/drivers/media/dvb/frontends/s5h1411.c
@@ -585,9 +585,6 @@ static int s5h1411_set_frontend(struct dvb_frontend *fe,
 
         s5h1411_enable_modulation(fe, p->u.vsb.modulation);
 
-        /* Allow the demod to settle */
-        msleep(100);
-
         if (fe->ops.tuner_ops.set_params) {
                 if (fe->ops.i2c_gate_ctrl)
                         fe->ops.i2c_gate_ctrl(fe, 1);
@@ -598,6 +595,10 @@ static int s5h1411_set_frontend(struct dvb_frontend *fe,
                         fe->ops.i2c_gate_ctrl(fe, 0);
         }
 
+        /* Issue a reset to the demod so it knows to resync against the
+           newly tuned frequency */
+        s5h1411_softreset(fe);
+
         return 0;
 }