Re: si2168/dvbsky - blind-scan for DVB-T2 with PLP fails

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(Resending as the first try apparently hasn't made it onto the mailing-list)


On 06.06.2015 16:17, Antti Palosaari wrote:
On 06/06/2015 05:07 PM, Hurda wrote:
Thanks, this worked.
The kernel of Ubuntu 15.04 already was compiled with dynamic debug,
which saved
me a lot of time.
The driver is properly setting stream_id to 1 when needed.

I tried again with the vanilla source and "cmd.args[2] = 0;".
With the vanilla source, it doesn't find any T2-transponders.

You mean with vanilla source, but without that "cmd.args[2] = 0;" hack it does
not find any transponders?


No T2-transponders, no.
With "cmd.args[2] = 0;" the number of found T2-transponders is changing with every scan.
Using the dvbsky-driver, the scan always finds all four T2-transponders.


With the modified source, the number of found transponders changes every
time

You mean with source, modified with that "cmd.args[2] = 0;" hack it finds
transponders, but not always?

If that is difference, then it sounds just like application is requesting some
PLP, probably 0, and it will not work as your network delivers channels using
PLP 1.

"cmd.args[2] = 0;" disables PLP filtering - it sets auto mode. Why it likely
does not find all channels is too short timeout.

Increase timeout value to 3 second, 900 => 3000, in funtion
si2168_get_tune_settings()

No difference, even with 10000. Tried that timeout with "cmd.args[2] = 0;" and "cmd.args[2] = c->stream_id == NO_STREAM_ID_FILTER ? 0 : 1;"

You didn't provide any debugs to see what PLP ID your application is
requesting. It is the most important thing I would like to know, as I suspect
it is wrong.

regards
Antti


Debug-logs:
http://www.mediafire.com/download/8j4s9oytsfv9s40/si2168-dvbsky_debug_logs.zip
Made with the vanilla tree and "cmd.args[2] = 0;", and timeout 900 (default) and 3000msec.
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