[patch 36/57] DVB: s5h1411: Perform s5h1411 soft reset after tuning | |
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2.6.27-stable review patch. If anyone has any objections, please let us know.
------------------
From: Devin Heitmueller <devin.heitmueller@xxxxxxxxx>
cherry picked from commit f0d041e50bc6c8a677922d72b010f80af9b23b18
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/media/dvb/frontends/s5h1411.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
--- a/drivers/media/dvb/frontends/s5h1411.c
+++ b/drivers/media/dvb/frontends/s5h1411.c
@@ -588,9 +588,6 @@ static int s5h1411_set_frontend(struct d
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 d
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;
}
--
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