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.