From f0d041e50bc6c8a677922d72b010f80af9b23b18 Mon Sep 17 00:00:00 2001 From: Devin Heitmueller Date: Mon, 20 Oct 2008 10:17:08 -0300 Subject: [PATCH] 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 Reviewed-by: Michael Krufky Acked-by: Steven Toth Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb/frontends/s5h1411.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/media/dvb/frontends/s5h1411.c b/drivers/media/dvb/frontends/s5h1411.c index e328d88..40e0fed 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; } -- 2.7.4