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[media] tda18271: make 'low-power standby mode after attach' multi-instance safe 

Ensure that unnecessary features are powered down at the end of the
attach() function on attach of the tuner's first instance. If the
configuration requires the loop thru or xtout features, they will
remain enabled.
This must *only* be done after attaching the first instance of the tuner.
If there are multiple instances of the tuner, the bridge driver will need
to maintain power managament by itself.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Michael Krufky 2012-09-29 16:06:23 -03:00 committed by Mauro Carvalho Chehab
parent 185e4768b8
commit 4cfae67515
1 changed files with 4 additions and 3 deletions
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7
drivers/media/tuners/tda18271-fe.c
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@ -1285,6 +1285,10 @@ struct dvb_frontend *tda18271_attach(struct dvb_frontend *fe, u8 addr,
(priv->id == TDA18271HDC2))
tda18271c2_rf_cal_init(fe);
/* enter standby mode, with required output features enabled */
ret = tda18271_toggle_output(fe, 1);
tda_fail(ret);
mutex_unlock(&priv->lock);
break;
default:
@ -1323,9 +1327,6 @@ struct dvb_frontend *tda18271_attach(struct dvb_frontend *fe, u8 addr,
if (tda18271_debug & (DBG_MAP | DBG_ADV))
tda18271_dump_std_map(fe);
ret = tda18271_sleep(fe);
tda_fail(ret);
return fe;
fail:
mutex_unlock(&tda18271_list_mutex);