From: Devin Heitmueller <devin.heitmueller@xxxxxxxxx> DVB: 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@xxxxxxxxx> Signed-off-by: Michael Krufky <mkrufky@xxxxxxxxxxx> Acked-by: Steven Toth <stoth@xxxxxxxxxxx> Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> (cherry picked from commit f0d041e50bc6c8a677922d72b010f80af9b23b18) --- drivers/media/dvb/frontends/s5h1411.c | 7 ++++--- 1 files changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/media/dvb/frontends/s5h1411.c b/drivers/media/dvb/frontends/s5h1411.c index 2b62e42..5ddf9ca 100644 --- a/drivers/media/dvb/frontends/s5h1411.c +++ b/drivers/media/dvb/frontends/s5h1411.c @@ -588,9 +588,6 @@ 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); @@ -601,6 +598,10 @@ 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; } _______________________________________________ v4l-dvb-maintainer mailing list v4l-dvb-maintainer@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/v4l-dvb-maintainer