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[media] si2165: only write agc registers after reset before start_syncro 

Datasheet says they must be rewritten after reset.
But it only makes sense to write them when trying to tune afterwards.

Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Matthias Schwarzott 2015-11-19 18:03:56 -02:00 committed by Mauro Carvalho Chehab
parent a5293dbd70
commit eae56684a0
1 changed files with 15 additions and 17 deletions
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32
drivers/media/dvb-frontends/si2165.c
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@ -690,23 +690,6 @@ static int si2165_init(struct dvb_frontend *fe)
goto error;
}
/* write adc values after each reset*/
ret = si2165_writereg8(state, 0x012a, 0x46);
if (ret < 0)
goto error;
ret = si2165_writereg8(state, 0x012c, 0x00);
if (ret < 0)
goto error;
ret = si2165_writereg8(state, 0x012e, 0x0a);
if (ret < 0)
goto error;
ret = si2165_writereg8(state, 0x012f, 0xff);
if (ret < 0)
goto error;
ret = si2165_writereg8(state, 0x0123, 0x70);
if (ret < 0)
goto error;
return 0;
error:
return ret;
@ -788,6 +771,14 @@ static int si2165_set_if_freq_shift(struct si2165_state *state, u32 IF)
return si2165_writereg32(state, 0x00e8, reg_value);
}
static const struct si2165_reg_value_pair agc_rewrite[] = {
{ 0x012a, 0x46 },
{ 0x012c, 0x00 },
{ 0x012e, 0x0a },
{ 0x012f, 0xff },
{ 0x0123, 0x70 }
};
static int si2165_set_frontend(struct dvb_frontend *fe)
{
int ret;
@ -924,6 +915,13 @@ static int si2165_set_frontend(struct dvb_frontend *fe)
ret = si2165_writereg32(state, 0x0384, 0x00000000);
if (ret < 0)
return ret;
/* write adc values after each reset*/
ret = si2165_write_reg_list(state, agc_rewrite,
ARRAY_SIZE(agc_rewrite));
if (ret < 0)
return ret;
/* start_synchro */
ret = si2165_writereg8(state, 0x02e0, 0x01);
if (ret < 0)