Hi!

> > # CONFIG_SND_OMAP_SOC_RX51 is not set
> > # CONFIG_SND_OMAP_SOC_N9 is not set
> > CONFIG_SND_OMAP_SOC_OMAP_TWL4030=y
> > CONFIG_SND_OMAP_SOC_OMAP_ABE_TWL6040=y
> 
> That's not needed (but does not hurt). The Droid 4
> has no TWL companion chip and uses CPCAP instead.

Aha, thanks. I was doing wild experiments to get something that
boots... I turned them off.

> > Any ideas?
> 
> You probably did not enable the soundcard driver, that binds against
> "audio-graph-card" compatible and connects the codec driver with the
> SoC driver: CONFIG_SND_AUDIO_GRAPH_CARD

Ok, that certainly changed things; I am now getting this:

Mar 23 08:39:17 devuan kernel: [   11.633605] asoc-audio-graph-card soundcard: GPIO lookup for
 consumer pa
Mar 23 08:39:17 devuan kernel: [   11.644958] asoc-audio-graph-card soundcard: using device tr
ee for GPIO lookup
Mar 23 08:39:17 devuan kernel: [   11.656677] of_get_named_gpiod_flags: can't parse 'pa-gpios'
 property of node '/soundcard[0]'
Mar 23 08:39:17 devuan kernel: [   11.669738] of_get_named_gpiod_flags: can't parse 'pa-gpio' 
property of node '/soundcard[0]'
Mar 23 08:39:17 devuan kernel: [   11.682617] asoc-audio-graph-card soundcard: using lookup ta
bles for GPIO lookup
Mar 23 08:39:17 devuan kernel: [   11.694427] asoc-audio-graph-card soundcard: lookup for GPIO
 pa failed

Indeed the dts does not seem to contain any gpios

        soundcard {
                compatible = "audio-graph-card";
                label = "Droid 4 Audio";

                simple-graph-card,widgets =
                        "Speaker", "Earpiece",
                        "Speaker", "Loudspeaker",
	                "Headphone", "Headphone Jack",
	                "Microphone", "Internal Mic";

                simple-graph-card,routing =
	                "Earpiece", "EP",
		        "Loudspeaker", "SPKR",
                        "Headphone Jack", "HSL",
                        "Headphone Jack", "HSR",
	                "MICR", "Internal Mic";

                dais = <&mcbsp2_port>, <&mcbsp3_port>;
	};

Any more ideas? :-)

Thanks,

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html