[media] dvb: Allow select between DVB-C Annex A and Annex C
authorMauro Carvalho Chehab <mchehab@redhat.com>
Fri, 11 Nov 2011 14:46:23 +0000 (12:46 -0200)
committerMauro Carvalho Chehab <mchehab@redhat.com>
Fri, 11 Nov 2011 14:46:23 +0000 (12:46 -0200)
commit39ce61a846c8e1fa00cb57ad5af021542e6e8403
treefc2ece73b3c54a805f9ac85d390f2388f741b46c
parente9eb0dadba932940f721f9d27544a7818b2fa1c5
[media] dvb: Allow select between DVB-C Annex A and Annex C

DVB-C, as defined by ITU-T J.83 has 3 annexes. The differences between
Annex A and Annex C is that Annex C uses a subset of the modulation
types, and uses a different rolloff factor. A different rolloff means
that the bandwidth required is slicely different, and may affect the
saw filter configuration at the tuners. Also, some demods have different
configurations, depending on using Annex A or Annex C.

So, allow userspace to specify it, by changing the rolloff factor.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Documentation/DocBook/media/dvb/dvbproperty.xml
drivers/media/dvb/dvb-core/dvb_frontend.c
include/linux/dvb/frontend.h