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V4L/DVB (4935): Added the capability of selecting fm gain by tuner

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Some tuners require using cGainNormal instead of cGainLow for
high sensibility on FM reception.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Mauro Carvalho Chehab 2006-12-04 08:31:38 -03:00
parent cefccc8011
commit 483deb0f2b
2 changed files with 6 additions and 0 deletions
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2
drivers/media/video/tuner-simple.c
View File

@ -467,6 +467,8 @@ static void default_set_radio_freq(struct i2c_client *c, unsigned int freq)
config |= TDA9887_INTERCARRIER; config |= TDA9887_INTERCARRIER;
/* if (params->port1_set_for_fm_mono) /* if (params->port1_set_for_fm_mono)
config &= ~TDA9887_PORT1_ACTIVE;*/ config &= ~TDA9887_PORT1_ACTIVE;*/
if (params->fm_gain_normal)
config |= TDA9887_GAIN_NORMAL;
i2c_clients_command(c->adapter, TDA9887_SET_CONFIG, &config); i2c_clients_command(c->adapter, TDA9887_SET_CONFIG, &config);
} }
if (4 != (rc = i2c_master_send(c,buffer,4))) if (4 != (rc = i2c_master_send(c,buffer,4)))

4
include/media/tuner-types.h
View File

@ -50,6 +50,10 @@ struct tuner_params {
sensitivity. If this setting is 1, then set PORT2 to 1 to sensitivity. If this setting is 1, then set PORT2 to 1 to
get proper FM reception. */ get proper FM reception. */
unsigned int port2_fm_high_sensitivity:1; unsigned int port2_fm_high_sensitivity:1;
/* Some Philips tuners use tda9887 cGainNormal to select the FM radio
sensitivity. If this setting is 1, e register will use cGainNormal
instead of cGainLow. */
unsigned int fm_gain_normal:1;
/* Most tuners with a tda9887 use QSS mode. Some (cheaper) tuners /* Most tuners with a tda9887 use QSS mode. Some (cheaper) tuners
use Intercarrier mode. If this setting is 1, then the tuner use Intercarrier mode. If this setting is 1, then the tuner
needs to be set to intercarrier mode. */ needs to be set to intercarrier mode. */