[alsa-devel] Audio routing in the tlv320aic3104

[Caleb Crome]

Sent from my iPhone

> On Oct 7, 2015, at 4:12 AM, Rick Mann <rmann at latencyzero.com> wrote:
> 
> I've managed to get a hacky, fragile config working, in the sense that it sends my tlv320aic3104 samples from speaker-test, and the clocks and data all look good on the oscilloscope, and it ping-pongs between the left and right channel.
> 
> But it's outputting the signal on the HPLOUT/HPROUT pins, not the L&R Line Out pins.
> 
> My DTS has this:
> 
>    fragment at 3 {
>        target = <&ocp>;
>        __overlay__ {
>            sound {
>                compatible = "ti,da830-evm-audio";
>                ti,model = "DA830 EVM";
>                ti,audio-codec = <&tlv320aic3x>;
>                ti,mcasp-controller = <&mcasp0>;
>                ti,codec-clock-rate = <12000000>;
>                ti,audio-routing =
>                    "Line Out",             "LLOUT",
>                    "Line Out",             "RLOUT";
>            };
>        };
>    };
> 
> The original had:
> 
>    "Headphone Jack",       "HPLOUT",
>    "Headphone Jack",       "HPROUT",
>    "LINE1L",               "Line In",
>    "LINE1R",               "Line In";
> 
> I also have an asound.state file I got from the Audio Cape:
> 
>    https://raw.githubusercontent.com/CircuitCo/BeagleBone-Audio/files/asound.state
> 
> I don't really know how to interpret that file. One resource online said it held the current state of the system. I guess that suggests I should play with amixer. But how does the DTS routing come into play?
> 
> Thanks,
> 

Check for the routing in the davinci-evm.c file.  It has other routes,  I kind of recall it says some outputs are not connected.    You might have to edit routs there too. 


> 
> 
> -- 
> Rick Mann
> rmann at latencyzero.com
> 
> 
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