Soeren.Moch wrote:
For a few weeks I use a Nova-TD-Stick and was annoyed with dvb stream
errors, although the demod bit-error-rate (BER/UNC) was zero.
I could track down this problem to dib0700_streaming_ctrl:
When one channel is streaming and the other channel is switched on, the
stream of the already running channel gets broken.
I think this is a firmware bug and should be fixed there, but I attach a
driver patch, which solved the problem for me. (Kernel 2.6.29.1, FW
1.20, Nova-T-Stick + Nova-TD-Stick used together). Since I had to reduce
the urb count to 1, I consider this patch as quick hack, not a real
solution.
Probably the same problem exists with other dib0700 diversity/dual
devices, without a firmware fix a similar driver patch may be helpful.
Regards,
Soeren
Hi Patrick,
do you see any chance that somebody will fix the firmware? If not, can
you take
into consideration to remove the dib0700_streaming_ctrl callback as in the
(again) attached patch so solve the switch-on problem?
The patch runs flawlessly on my vdr system for weeks now. There are no
negative
side effects from reducing the urb count to 1.
If you prefer a patch that removes the callback for all dib0700 devices or
only for all dual devices, I can prepare that. But I can test it only with
Nova-T-Stick and Nova-TD-Stick.
Regards,
Soeren
--- drivers/media/dvb/dvb-usb/dib0700_devices.c.orig 2009-04-18 16:45:12.000000000 +0200
+++ drivers/media/dvb/dvb-usb/dib0700_devices.c 2009-04-18 18:58:54.000000000 +0200
@@ -290,6 +290,9 @@ static int stk7700d_frontend_attach(stru
adap->fe = dvb_attach(dib7000p_attach, &adap->dev->i2c_adap,0x80+(adap->id << 1),
&stk7700d_dib7000p_mt2266_config[adap->id]);
+ adap->props.streaming_ctrl = NULL;
+ dib0700_streaming_ctrl(adap, 1);
+
return adap->fe == NULL ? -ENODEV : 0;
}
@@ -1414,7 +1417,7 @@ MODULE_DEVICE_TABLE(usb, dib0700_usb_id_
.streaming_ctrl = dib0700_streaming_ctrl, \
.stream = { \
.type = USB_BULK, \
- .count = 4, \
+ .count = 1, \
.endpoint = ep, \
.u = { \
.bulk = { \
