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V4L/DVB (7052): tda18271: when tuning digital, the analog demod must be tri-stated

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Call analog_ops.standby during tda18271_set_params, to put the tda8295
in tri-state when tuning digital channels.  Otherwise the tda8295 will
interfere with the signal coming from the tda18271 into the digital
demodulator.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Michael Krufky 2008-01-19 17:41:04 -03:00 committed by Mauro Carvalho Chehab
parent 3473e342d7
commit ed73683f06
1 changed files with 4 additions and 1 deletions
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5
drivers/media/dvb/frontends/tda18271-fe.c
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@ -836,7 +836,6 @@ static int tda18271_set_params(struct dvb_frontend *fe,
priv->mode = TDA18271_DIGITAL;
/* see table 22 */
if (fe->ops.info.type == FE_ATSC) {
switch (params->u.vsb.modulation) {
case VSB_8:
@ -884,6 +883,10 @@ static int tda18271_set_params(struct dvb_frontend *fe,
return -EINVAL;
}
/* When tuning digital, the analog demod must be tri-stated */
if (fe->ops.analog_ops.standby)
fe->ops.analog_ops.standby(fe);
ret = tda18271_tune(fe, sgIF * 1000, freq, bw, std, 0);
if (ret < 0)