Em 14-08-2012 17:15, Reinhard Nissl escreveu: > Hi, > > Am 14.08.2012 14:05, schrieb Manu Abraham: > >>> My other device, a STB0899, always reports the set frequency. So it seems >>> driver dependent whether it reports the actually locked frequency found by >>> the zig-zag-algorithm or just the set frequency to tune to. >> >> The STV0299 blindly sets the value based on a software zigzag (due to simpler >> hardware), but this might not be accurate enough. On the other hand, the >> STB0899 internally does zig-zag in hardware for DVB-S2, and partly in >> software for DVB-S. >> >> In any event, the get_frontend callback should return the value that is read >> from the demodulator registers, rather than the cached original value that >> which was requested to be tuned. >> >> The stb0899 returns only the cached value IIRC. Maybe I will fix this soon, >> or maybe you can send a patch. > > See the attached patch. > > This is what I get after the patch: > > Sat. Pol. Band Freq (MHz) Set Freq (MHz) Get Delta (MHz) > S19,2E H L 10744 10748,474 4,474 > S19,2E H L 10773 10777,944 4,944 > S19,2E H L 10832 10836,953 4,953 > S19,2E H L 10861 10868,774 7,774 > S19,2E H L 10920 10924,312 4,312 > S19,2E H L 11023 11026,827 3,827 > S19,2E H L 11170 11175,423 5,423 > S19,2E H L 11243 11248,452 5,452 > S19,2E H L 11302 11307,371 5,371 > S19,2E H L 11361 11366,427 5,427 > S19,2E H L 11420 11425,473 5,473 > S19,2E H L 11464 11468,876 4,876 > S19,2E H L 11493 11498,421 5,421 > S19,2E H L 11523 11529,080 6,080 > S19,2E H L 11582 11586,942 4,942 > S19,2E H L 11611 11618,785 7,785 > S19,2E H L 11641 11645,951 4,951 > S19,2E H L 11670 11675,450 5,450 > S19,2E H H 11719 11724,970 5,970 > S19,2E H H 11758 11763,975 5,975 > S19,2E H H 11797 11802,978 5,978 > S19,2E H H 11836 11841,972 5,972 > S19,2E H H 11875 11880,951 5,951 > > I'll have to let VDR "travel" across the transponders several times to see whether I get similar results for the previously mentioned transponder on the stv0299 device. > > Bye. The patch seems to be working. Anyway, for it to be merged, you'll need to be sending it together with your SOB (Signed-off-by), and using the -p1 format e. g. something like: --- a/drivers/media/dvb/frontends/stb0899_drv.c 2012-08-14 21:59:59.000000000 +0200 +++ b/drivers/media/dvb/frontends/stb0899_drv.c 2012-08-14 21:29:17.000000000 +0200 as otherwise developer's scripts won't get it right. Thanks, Mauro. -- 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
