Mailing List archive
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[linux-dvb] Experience building DVS dvb-kernel on 2.4.18 for budget Nova-T
Hi,
After my machine suddenly started crashing with my old DVB driver and my
Nova-T, I decided to install the most current new dvb-kernel driver.
I pulled it from the CVS - yesterday's version (2003-01-26).
Here is my experience:
1) 2.4.18 kernel doesn't export get_user_pages
I just modified and rebuilt my kernel with this symbol exported.
2) Had some problems with GPLONLY symbols in saa7146*.c and video-buf.c
I don't really understand this stuff properly - I just replaced the
EXPORT_SYMBOL_GPL with a regular EXPORT_SYMBOL
3) "unlikely" was unknown in video-buf.c
Probably because my gcc is version 2.95.3. I just defined
unlikely with "#define unlikely(x) (x)"
4) in compat.[hc], vmalloc_to_page included for all kernels <2.5.0.
My kernel, at least, does have this exported. Perhaps that's not
standard. In any event, I changed the compat.c and compat.h to
only include it for versions <2.4.18
5) In video-buf.c, BUG_ON wasn't defined
This was only introduced in 2.4.20. There is a define for it in
saa7146.h, but video-buf.c doesn't #include that.
I changed video-buf.c to include saa7146.h
With this lot adjusted, the driver built and showed signs of working.
My problem then was that dvbstream would capture a few seconds of video
and then data would stop. In the syslog, the fidbirqs would stop too.
This seemed to correspond to a call to budget_diseqc_ioctl - which was
odd because I didn't see in dvbstream where such an ioctl was called.
This led me to:
6) In budget-core.c, diseqc ioctl handler is included
This code:
if(budget->card->type == BUDGET_TT)
dvb_add_frontend_ioctls (budget->dvb_adapter, budget_diseqc_ioctl, NULL, budget);
Don't see how this is relevant for a NOVA-T. And, strangely, the
budget_diseqc_ioctl seems to get called when dvbstream is running, and
appeared to be causing trouble. I #ifdeffed it out.
Later, I saw on the linux-dvb list that this going-dumb behaviour can also
be avoided by using "options dvb-core dvb_shutdown_timeout=0" in
modules.conf.
The driver seems to be working OK now - though it does appear to exhibit
more picture glitches than the old one - but this I haven't properly
investigated.
Thanks, hope this feedback is helpful.
Steve
--
Info:
To unsubscribe send a mail to listar@linuxtv.org with "unsubscribe linux-dvb" as subject.
Home |
Main Index |
Thread Index