> > In analog loopback mode, DACs should not be enabled. For > > that reason, DAC widgets (DAC Right1, DAC Left1, DAC > > Right2, DAC Left2) will power DACs only during playback. > > Analog loopback requires to set a master enable bit when any > > of the analog bypass switches are enabled. > I have also noticed this, also in analog loopback mode the > bits in the OPTION register can be cleared, since we don't > need those to have analog loopback. At least, the digital filters (configured in OPTION reg) are enabled when the corresponding DAC is enabled, can we attach them to a DAC somehow? Could it be a valid approach? > But I'm afraid, this patch does break the Digital loopback, > which needs the DACs to be powered, in case when the capture > path is set in analog mode the ADC(s) also need to be powered. I think that digital loopback should mix TX with RX only when both digital paths are enabled, i.e. in a full-duplex scenario. I don't expect it to automatically enable DACs for me, although maybe I'm wrong and my argument breaks what digital loopback means :( Please clarify. > Both analog and digital loopback connects to 'Analog XY > Playback Mixer', which turns on/off the physical DAC on > the given route. That was a part of the audio map that doesn't make much sense to me, joining analog and digital loopback. > I have been thinking of - as a part of a big > clean up - to separate these, since as you have pointed out, > the DACs are not needed for the analog loopback. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
