On Friday 15 May 2009 14:00:07 ext Joonyoung Shim wrote:> On 5/15/2009 7:05 PM, Lopez Cruz, Misael wrote:> >>> In current code, as you say, you have to directly change> >>> the value of the reg cache for setting to option2, also> >>> you have to modify the REG_OPTION and REG_VOICE_IF reg for> >>> voice, but this is temporary method.> >>> >> This can be done with a register write from the DAI init()> >> function in the machine driver in order to avoid modifying> >> twl4030.c itself.> >> > For audio and voice interface, following things need to be configured:> >> > Audio interface:> > - Output pins state: high impendance or application mode> > - Enable audio interface> >> > Voice interface:> > - Enable voice data input> > - Enable voice data output> > - Output pins state: high impedance or application mode> > - Enable voice interface> >> > I think that interfaces can be enabled in DAI init as Mark suggests,>> Yes, but i worry about whether this reg value can be changed on the fly> or not. I believe this needs codec off/on >> > but input/output should be enabled depending on whether we are doing> > playback/capture or not, and then they should be handled in the codec> > driver.>> Hmm, the twl4030 codec can do the voice communication at the same time> while doing playback/capture, is not it? I think he means the bits in the OPTION register.The Option1 code toggles some of the bits in case of 4 channel mode.Same thing can be done for Option2 voice operation I think. >> > For the codec operation mode selection, I still think Peter's> > advice is more appropriate because options1,2 are not really tight to> > DAIs. For example, we can be in option2 (voice/audio) and do> > transferences using both DAIs: I2S and PCM. -- Péter_______________________________________________Alsa-devel mailing listAlsa-devel@xxxxxxxxxxxxxxxxxxxx://mailman.alsa-project.org/mailman/listinfo/alsa-devel
