On 08-12-2011 13:06, Mauro Carvalho Chehab wrote:
On 08-12-2011 12:00, Fredrik Lingvall wrote:
On 12/08/11 11:12, Mauro Carvalho Chehab wrote:
-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
Scanning 7MHz frequencies...
177500: (time: 00:00)
184500: (time: 00:03)
[...]
834000: (time: 02:46) (time: 02:48)
842000: (time: 02:50)
850000: (time: 02:52) (time: 02:55)
858000: (time: 02:56) (time: 02:58)
ERROR: Sorry - i couldn't get any working frequency/transponder
Nothing to scan!!
With regards to Italy, w_scan does something different than scan. The auto-italy
table used by scan tries several channels with both 8MHz and 7MHz, while w_scan
only tries 7MHz for VHF. This might explain the issue, if you're still able to
scan/tune with scan and if you have a good antenna.
Regards
Eddi
--
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
Are there similar problems while scanning DVB-C nets with w_scan?
And, is there a "scan everything" table for dvbscan?
No. Both w_scan/dvbscan get the same channels, and they match the channels
available at the STB and with other boards.
Btw, drivers/media/common/tuners/xc5000.c doesn't support 7MHz for DVB-T:
case BANDWIDTH_7_MHZ:
printk(KERN_ERR "xc5000 bandwidth 7MHz not supported\n");
return -EINVAL;
This may explain why you're getting so few channels on it. Only channels marked as
8MHz will be tuned.
I _suspect_ that:
case BANDWIDTH_7_MHZ:
case BANDWIDTH_8_MHZ:
priv->bandwidth = BANDWIDTH_8_MHZ;
priv->video_standard = DTV8;
priv->freq_hz = params->frequency - 2750000;
break;
On a more detailed look, I suspect that the reason why DTV7 was not implemented is
because there are two ways of supporting it: via DTV_78 or via DTV-8.
While I'm not sure about the frequency offset for DTV7, I suspect it is 2250000. Could
you please try the enclosed patch and see if it improves DVB-T and DVB-C detection?
Devin/Steven/Michael,
Could you please double check what is the offset for the center frequency to
be used on a 7MHz firmware on xc5000? I suspect it should be 2.25 MHz.
People are reporting troubles with HVR-930C channel detection, and I suspect that the
issue is due to the lack of proper support for 7MHz.
Regards,
Mauro
-
[media] xc5000: Add support for 7MHz-spaced channels
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
diff --git a/drivers/media/common/tuners/xc5000.c b/drivers/media/common/tuners/xc5000.c
index 19990bc..97ad338 100644
--- a/drivers/media/common/tuners/xc5000.c
+++ b/drivers/media/common/tuners/xc5000.c
@@ -676,8 +676,10 @@ static int xc5000_set_params(struct dvb_frontend *fe,
priv->freq_hz = params->frequency - 1750000;
break;
case BANDWIDTH_7_MHZ:
- printk(KERN_ERR "xc5000 bandwidth 7MHz not supported\n");
- return -EINVAL;
+ priv->bandwidth = BANDWIDTH_7_MHZ;
+ priv->video_standard = DTV7;
+ priv->freq_hz = params->frequency - 2250000;
+ break;
case BANDWIDTH_8_MHZ:
priv->bandwidth = BANDWIDTH_8_MHZ;
priv->video_standard = DTV8;
@@ -715,6 +717,10 @@ static int xc5000_set_params(struct dvb_frontend *fe,
priv->bandwidth = BANDWIDTH_6_MHZ;
priv->video_standard = DTV6;
priv->freq_hz = params->frequency - 1750000;
+ } else if (bw <= 7000000) {
+ priv->bandwidth = BANDWIDTH_7_MHZ;
+ priv->video_standard = DTV7;
+ priv->freq_hz = params->frequency - 2250000;
} else {
priv->bandwidth = BANDWIDTH_8_MHZ;
priv->video_standard = DTV7_8;
--
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
