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

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

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
hifive-unleashed-5.1
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;
/* if (params->port1_set_for_fm_mono)
config &= ~TDA9887_PORT1_ACTIVE;*/
if (params->fm_gain_normal)
config |= TDA9887_GAIN_NORMAL;
i2c_clients_command(c->adapter, TDA9887_SET_CONFIG, &config);
}
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
get proper FM reception. */
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
use Intercarrier mode. If this setting is 1, then the tuner
needs to be set to intercarrier mode. */