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[media] DiB8000: improve the tuning and the SNR monitoring

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This patches improves the tuning of the dib8000 and correct the monitoringr
of the SNR.The patch allows to faster detect that there is no ISDB-T channel
on the wanted frequency.

Signed-off-by: Olivier Grenie <olivier.grenie@dibcom.fr>
Signed-off-by: Patrick Boettcher <patrick.boettcher@dibcom.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Olivier Grenie 2011-07-04 12:33:54 -03:00 committed by Mauro Carvalho Chehab
parent a685dbbc65
commit 1f6bfcc752
1 changed files with 3 additions and 2 deletions
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5
drivers/media/dvb/frontends/dib8000.c
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@ -2215,7 +2215,7 @@ static int dib8000_set_frontend(struct dvb_frontend *fe, struct dvb_frontend_par
((state->fe[0]->dtv_property_cache.layer[1].segment_count == 0) ||
((state->fe[0]->dtv_property_cache.isdbt_layer_enabled & (2 << 0)) == 0)) &&
((state->fe[0]->dtv_property_cache.layer[2].segment_count == 0) || ((state->fe[0]->dtv_property_cache.isdbt_layer_enabled & (3 << 0)) == 0)))) {
int i = 80000;
int i = 100;
u8 found = 0;
u8 tune_failed = 0;
@ -2243,6 +2243,7 @@ static int dib8000_set_frontend(struct dvb_frontend *fe, struct dvb_frontend_par
default:
dprintk("unhandled autosearch result");
case 1:
tune_failed |= (1 << index_frontend);
dprintk("autosearch failed for the frontend%i", index_frontend);
break;
}
@ -2401,7 +2402,7 @@ static int dib8000_read_snr(struct dvb_frontend *fe, u16 * snr)
for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++)
snr_master += dib8000_get_snr(state->fe[index_frontend]);
if (snr_master != 0) {
if ((snr_master >> 16) != 0) {
snr_master = 10*intlog10(snr_master>>16);
*snr = snr_master / ((1 << 24) / 10);
}