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

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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>
This commit is contained in:
Devin Heitmueller 2008-10-20 10:17:08 -03:00 • committed by Mauro Carvalho Chehab
parent 1874c44328
commit f0d041e50b
1 changed files with 4 additions and 3 deletions

7
drivers/media/dvb/frontends/s5h1411.c
View file

@ -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;
}