On Mon, Oct 10, 2011 at 01:01:00PM +0300, Matti J. Aaltonen wrote: > On 10/07/2011 03:49 PM, ext Mark Brown wrote: > >What I said was that the entire audio system should be one card. > I didn't read it that way,but OK... Just one more comment/question: > I would have thought that to achieve as fine grained power > management as practical you'd want to divide the radio system into > two parts: the actual radio chip and the headphone amplifier. Our > example system would (in my view) look like the following: Power management is done at a *much* more fine grained level than whole device level. > And in this configuration you could (A) create a path from some > digital source (for example the digital signal from the radio > through a mixer etc.) though the DAC to the amplifier. Or you could > (B) form a purely analog path from the radio to the amplifier and > have the DAC off if path A was inactive. Makes sense or not? This is all really basic stuff that's been supported by the kernel since 2.6.21.
