Em Tue, 22 Jul 2014 12:09:48 +0100 Luis Alves <ljalvs@xxxxxxxxx> escreveu: > This patch fixes DVB-C reception. > Without setting the bandwidth to 8MHz the received stream gets corrupted. > > Regards, > Luis > > Signed-off-by: Luis Alves <ljalvs@xxxxxxxxx> > --- > drivers/media/tuners/si2157.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c > index 6c53edb..e2de428 100644 > --- a/drivers/media/tuners/si2157.c > +++ b/drivers/media/tuners/si2157.c > @@ -245,6 +245,7 @@ static int si2157_set_params(struct dvb_frontend *fe) > break; > case SYS_DVBC_ANNEX_A: > delivery_system = 0x30; > + bandwidth = 0x08; Hmm... this patch looks wrong, as it will break DVB-C support where the bandwidth is lower than 6MHz. The DVB core sets c->bandwidth_hz for DVB-C based on the rolloff and the symbol rate. If this is not working for you, then something else is likely wrong. I suggest you to add a printk() there to show what's the value set at c->bandwidth_hz and what's the symbol rate that you're using. On DVB-C, the rolloff is fixed (1.15 for annex A and 1.13 for Annex C). Not sure if DVB-C2 allows selecting a different rolloff factor, nor if si2157 works with DVB-C2. > break; > default: > ret = -EINVAL; -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
