[linux-dvb] Re: [PATCH] Skystar2 pid filters reorganization

[Roberto Ragusa <r.ragusa@libero.it>]

On Thu, 27 Nov 2003 09:13:32 -0800
"Augusto Cardoso" <augusto@carhil.net> wrote:

> The B2C2's original driver sets those registers because B2C2 's software always monitor the pids 00->1f. It's a long story why, but basic it has to do with transponder hopping and some other applications in Japan.
> It's not necessary for skystar2.o.

Another thing to consider is that pids 0x00->0x1f are low traffic, so
with only 6 pid filters available it is someway reasonable to let
them pass through group/mask and "software filter" with check_pid.

If we move to a more robust filtering structure this can be changed.
We could use a sort of open_0x00_0x1f_bandwith and a relative close.

Computing an optimal group/mask based on requested pids would be too
complex.

Having a good software filtering is important if we have to allocate
filters for 0x00-0x1f too, expecially if, as I'm reading, some chips
don't have the extra 0x310 filters.

I'm glad to see great interest in this driver.

-- 
   Roberto Ragusa    r.ragusa at libero.it


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