[linux-dvb] Re: IRQ issues with Nova-S CI when using CI Module

Oliver Endriss o.endriss at gmx.de
Sat Jul 16 00:50:14 CEST 2005


Michael Ditum wrote:
> Whilst we've fixed the recurring IRQ issue some times we still get the
> NMI Issue that I first talked about. Sometimes when I boot up I get
> this problem other times I do not. I've run memtest86+ for one pass
> and it came up with nothing... I'll try a longer run during my lunch
> break just to make sure but I don't believe it is a RAM issue.

NMIs are usually caused by broken hardware.

> According to the stacktrace the last time it was in the dvb code was
> in start_ts_capture in budget_core.c. I believe its these lines...
> 
> 113: saa7146_write(dev, MC2, (MASK_08 | MASK_24));
> 114: mdelay(10);
> 115: 
> 116: saa7146_write(dev, BASE_ODD3, 0);
> 117: saa7146_write(dev, BASE_EVEN3, 0);
> 118: saa7146_write(dev, PROT_ADDR3, TS_WIDTH * TS_HEIGHT);
> 119: saa7146_write(dev, BASE_PAGE3, budget->pt.dma | ME1 | 0x90);
> 
> Why is there a 10 millisecond delay done there?

Don't know. Imho it is not required but it doesn't hurt.

> How could it cause an NMI?

It can't. :D

> Is it OK to comment out that line?

Imho yes.

> I appreciate any help in tracking this issue down.

Try your DVB cards in a different machine.

Oliver

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