> Right, that's how snd-powermac does it. It has the nasty side-effect of > polluting the cache a lot though, since dbdma commands are 16 bytes > long. Am I wrong?
You don't have that much DBDMA commands that it would pollute the cache _a lot_ :) > > Since we can only update the framecounter on a per-period basis, > > Alsa calls this thing the 'pointer' :) The frame counter we currently > use is the frame counter register of the i2s bus controller, and I don't > see why we shouldn't do that instead of reading back all the dbdma > command status fields. If you manage to have it properly in sync, that may work too. > Since the i2s bus is not shut down it also counts when we are not > transferring data. We currently calibrate on the first interrupt. That's > fine, since having multiple periods means that we don't need to be > absolutely precise here. If we miss one, that's fine, we can make it up > the next time by saying that 2 have elapsed. Ok. Ben. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]