John Watlington wrote: > We have often discussed the need for an audio DCON. > It wouldn't take much -- the amount of memory required > for a second of playback/record could be included in > the codec. > > wad
My impression is that the codec does DMA to memory for recording and playback. If DMA works during CPU suspend, then it seems like playback should "just work". In fact, if the buffer's big enough, the interrupts issued by the codec should be able to wake the CPU up in time to refill/empty the buffer without a glitch. The power domain charts for XO-1 and XO-1.5 don't quite tell me whether the codec, amplifiers, northbridge, and southbridge are enough powered in suspend for this to work. I imagine not, though, so audio playback will probably have to inhibit suspend in XO-1.5. I do not think this will be difficult to implement in software. --Ben
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