[linux-dvb] [PATCH/RFC] add dvb-s2 support to frontend.h and dvb_frontend.[h|c]

[Alan Nisota]

I've been working on updating the genpix driver to work with your
latest DVB-S2 patch  (to see what is involved, as well as to get
something closer to what will finally be released, as people are
already using the crude hack I posted a couple of months ago)
How do you expect the frontend to know which parameters to use?
It looks like you've defined set_frontend2 which I assume can be used
in place of set_frontend, but it isn't actually called anywhere yet
(that's ok, i can put in the relevant calls).  The issue I have is
that set_frontend is called from dvb_frontend_swzigzag_autotune and
dvb_frontend_swzigzag both of which examine fepriv->parameters.  Do
you expect to update these functions to use fepriv->parameters_new (I
assume so)?  if so, how do you know when to use one vs the other?  Is
the presence of non-zero fepriv->current_standard_set good enough to
know we should be using FE_SET_FRONTEND2?  Or is
fepriv->parameters_new != NULL a better method?  what if the app had
called FE_SET_FRONTEND2 last time, but this time around used
FE_SET_FRONTEND?

also, as you removed all of the other 'new' methods, perhaps
fepriv->parameters_new should instead be fepriv->parameters2?

Once I figure out your intentions on passing the new tuning parameters
to the driver, I don't foresee any additional issues with actually
getting the driver working with them.