[linux-dvb] Re : LinuxDVB for STi7109

Pedro Aguilar paguilar at junkerhq.net
Tue Jun 17 23:29:41 CEST 2008


AFAIK, nobody is working on it.
The STAPI drivers are not very nice because they reused the drivers of
their OS21 operating system, but in order to make them compatible with
Linux they wrote for each driver (including DVB and Framebuffer) a
"wrapper driver". In this way you end up with two drivers for each
device. What is more confusing is that you have two functions with the
same name, one func in the "wrapper driver" and one in the "real

The only Open Source driver that ST supports is the DirectFB one.

Sometime ago I managed to lock a can tuner (stv0299) in a stb7109, but
then I didn't have time for keep going with the demux part. I don't have
much experience developing with Linux DVB API, but I think the must
difficult part for making it work on the STi7109 is to do the filtering
(that I think is done by the coprocessors) and then send the streaming
to the video/audio coprocessors.

Pedro Aguilar

On Fri, 2008-06-13 at 18:27 +0200, Mark H wrote:
> > Well if they run linux I dont see how they can provide a
> proprietary 
> > implementation... I guess the shortest to get support on linux is
> to 
> > ask them to release the source code!
> I know there are many controversial discussions with respect to closed
> source
> projects for Linux. The fact is that ST Microelectronics has
> implemented kernel
> modules with a proprietary interface (STAPI) for the DVB and is not
> willing to
> disclose the interface details to open source projects. On the other
> hand STM
> provides STLinux distribution for boards based on STi7109 & Co. This
> distribution
> contains open source drivers only the output part of the system
> (V4Land ALSA).
> A copy of the chip datasheet is available on the web. Though, its
> legality is questionnable.
> There have been some questions about the API two years ago so I was
> wondering
> whether anybody has started working on an implementation.
> Regards,
> Mark
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