Re: i810 audio patch

[Nathan Bryant]

Doug Ledford wrote:

> Can you add a debug check to update_lvi()?  Something like:
>
> #ifdef DEBUG_MMAP
>         if (dmabuf->count > dmabuf->fragsize && inb(port+OFF_CIV) == x)
>                 printk(KERN_DEBUG,"i810_audio: update_lvi - CIV == 
> LVI\n");
> #endif
>
> and see if that triggers with the original mmap code? 

I've narrowed it down a little more.. the above does not trigger. but 
i've added some other printk's and the sequence of events goes like this:

open, mmap
SETTRIGGER : works properly with the resync_dma removed; count 
initialized to 65536
we take 6 interrupts; 4 comp + lvi + dch; count drains to 0 properly
[quake finishes initializing]
GETOPTR:
at the beginning of the call, count is 0; by the end of the call, count 
has been set to 64K

but, we take no interrupts after this point.