Peter Martin wrote: > I have a couple of Hauppauge cards (Nova-T using the cx2388x and a Nova > Plus, again using an cx2388x) in an industrial motherboard (an Axiomtek > ATX6022-14G) which is causing me some grief. After a short time I am > getting both cards locking up (no DMA) at the same time. Does it happen with only a single card active in the system? Have you tried the cards on other motherboards and do they operate successfully without error? > > In order to get these cards working at all in this configuration, I have > re-arranged the SRAM and increased the FIFO size in cx88-core.c to > 0x4800 bytes, and disabled all the other channels (video, audio etc), > which has cured the FIFO overflow errors I was getting ( general errors: > 0x00000100), but the cards still lock up. The cards can run from between > 5 seconds and 30 minutes before the lockup. I also get the lockups with > the stock code, so I am happy that my SRAM chganges have not broken > anything. IIRC, the fifo is pretty small (resulting in potential short latency issues). This could be compounded with a busy DMA bus and short fifo's both competing for the same DMA queue resource. I suspect increasing the fifo really just masks the real DMA contension issue. What else is happening DMA wise in your system? - Steve _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
