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>

diff --git a/drivers/media/dvb/frontends/s5h1411.c b/drivers/media/dvb/frontends/s5h1411.c
index e328d88bcbd4eb27449d596aaa2162c205e9ae24..40e0fedf381e1b9a8f9f7e41be7b7f82defbc7c5 100644 (file)
--- 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;
 }