Em Sun, 17 Dec 2017 14:50:37 +0100 Ralph Metzler <r...@metzlerbros.de> escreveu:
> Athanasios Oikonomou writes: > > A new property DTV_SCRAMBLING_SEQUENCE_INDEX introduced to control > > the gold sequence that several demods support. > > > > Also the DVB API was increased in order userspace to be aware of the > > changes. > > > > The stv090x driver was changed to make use of the new property. > > > > Those commits based on discussion previously made on the mailling list. > > https://www.mail-archive.com/linux-media@vger.kernel.org/msg122600.html > > > > I would like to thanks Ralph Metzler (r...@metzlerbros.de) for the > > great help and ideas he provide me in order create those patches. > > > > Athanasios Oikonomou (2): > > media: dvb_frontend: add physical layer scrambling support > > media: stv090x: add physical layer scrambling support > > > > .../media/uapi/dvb/fe_property_parameters.rst | 18 > ++++++++++++++++++ > > .../uapi/dvb/frontend-property-satellite-systems.rst | 2 ++ > > drivers/media/dvb-core/dvb_frontend.c | 12 ++++++++++++ > > drivers/media/dvb-core/dvb_frontend.h | 5 +++++ > > drivers/media/dvb-frontends/stv090x.c | 16 > ++++++++++++++++ > > include/uapi/linux/dvb/frontend.h | 5 ++++- > > include/uapi/linux/dvb/version.h | 2 +- > > 7 files changed, 58 insertions(+), 2 deletions(-) > > > > -- > > 2.1.4 > > Acked-by: Ralph Metzler <r...@metzlerbros.de> I'm applying both patches. > We had some thoughts about having a: > > #define NO_SCRAMBLING_CODE (~0U) > > But DVB-S2 is always scrambling (with default index 0) and other delivery > systems can ignore this > property. Or do you think it is needed? > > > One could add a define for AUTO or AUTO_S2X for the standard 7 indices to be > tested > in DVB-S2X. But either dvb_frontend.c or the demod driver would have to > support this in software. > I don't think there is a demod which supports this in hardware yet? I think that, once we have a hardware capable of auto-detecting the gold sequence, then a NO_SCRAMBLING_CODE (or AUTO_GOLD_SEQUENCE) could make sense. For now, I don't think any demod currently supports it. Thanks, Mauro
