> exactly what data is written to the scatter-gather DMA buffers?
That depends on what the VIA chip does to the data. Most AC97
controllers like the ES1371 include a sample format converter
and a sample rate converter between AC97 and the BMDMA engine.
> The AC97 docs talk about input and output slots, so I presume that an
> audio frame needs a special AC97 header of some sort...
On ACLink it's just 20bit signed stereo samples (sent with
a framing protocol that is surely handled in hardware).
Tom
NB: What datasheets do you have from VIA?
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/