On Thursday 14 May 2009 12:56:21 ext Mark Brown wrote:
On Thu, May 14, 2009 at 12:48:49PM +0300, Peter Ujfalusi wrote:
This is not really possible with the twl4030 codec. For simplicity, let's take the Audio left2 route: DACL2 -> PGAL2 ---> PreDriveL
|-> PreDriveR |-> HeadsetL |-> CarkitL |-> HandsFreeL |-> HandsFreeR \-> EarpieceAt least the Headset and HandsFree needs special mantra for the pop removal. If the Headset is not connected/used than there is no need to do the HS pop attenuation.
The event could check the current setup and do whatever's appropriate?
I have to think about this, but at first sight it does look awfully complicated thing to do (4 PGA, 7 output with mixers, 2+1 output mux)...
BTW, since you're saying the required ramp time is clock dependent shouldn't it also be possible to configure the ramp time automatically based on the clock that's been configured?
The patch that I have sent is calculating the needed delay based on the MCLK + RAMP_DELAY value. I think I don't want to fixate the ramp delay to any value (meaning that the delay would last around 50ms). This seams to be also board specific, so I would rather leave this to the user to find the best value for the given board.