On Mon, Oct 17, 2016 at 04:33:10PM -0700, Tim Harvey wrote: > I have a TI TLV320AIC3105 codec on a board connected to a TS3A227E > headset detect chip (which handles switching pins for OMTP vs std > jacks as well as jack detect and headset buttons). The AIC3105 doesn't > use several of the inputs and outputs yet those inputs and outputs > still have mux widgets volume widgets that are not 'off'. > Is there a way to easily disable them so they a) are not muxed into > mixers, b) have their gains set to 0, and c) are pruned from the list > of widgets so users don't have to muddle through them in mixers? No, you need to write that code if you want it - we do mark not connected things with the intention that someone could implement this but nobody did yet. > I am also fighting both a pop/click issue and am wondering if there is > any easy way to disable the DAPM power up/down sequence upon playback > start/complete (my application is not power sensitive). I'm still > trying to understand the source of the pop/click. You can ramp the power down time up but no, there's no way to disable it completely in the kernel - this is normally done in the sound server and tends to work better that way as starting and stopping the digital audio stream tends to be glitchy. > Additionally the TS3A227E requires MIC bias to be kept enabled in > order to detect headset button presses. I see that setting > idle_bias_off to false will keep the MIC bias enabled but I don't see > a way to specify that via device-tree. Your machine driver should force enable any widgets it needs. idle_bias_off should have no effect on microphone biases, if it does that sounds like a bug.
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