From 226143f96fa5ebc0da4a46f8a775129e5b759051 Mon Sep 17 00:00:00 2001 From: Reinhard Nissl Date: Sat, 18 Aug 2012 08:59:57 -0300 Subject: [PATCH] [media] stb0899: return internally tuned frequency via get_frontend. MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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. 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 ... Signed-off-by: Reinhard Nißl Cc: Manu Abraham Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb-frontends/stb0899_drv.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/media/dvb-frontends/stb0899_drv.c b/drivers/media/dvb-frontends/stb0899_drv.c index 5d7f8a9b451..79e29de87fb 100644 --- a/drivers/media/dvb-frontends/stb0899_drv.c +++ b/drivers/media/dvb-frontends/stb0899_drv.c @@ -1563,6 +1563,7 @@ static int stb0899_get_frontend(struct dvb_frontend *fe) dprintk(state->verbose, FE_DEBUG, 1, "Get params"); p->symbol_rate = internal->srate; + p->frequency = internal->freq; return 0; } -- 2.46.0