Messages in this thread |  | | | Date | Wed, 05 Dec 2001 18:46:58 -0500 | | From | Nathan Bryant <> | | Subject | Re: i810 audio patch |
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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.
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