[alsa-devel] Help with wm8731 support for the Utilite (imx6q)

[Jonathan Bennett]

On Tue, Oct 21, 2014 at 1:12 PM, Fabio Estevam <festevam at gmail.com> wrote:

> On Tue, Oct 21, 2014 at 4:04 PM, Jonathan Bennett <jbscience87 at gmail.com>
> wrote:
>
> > I realized something just last night. I was grabbing changes from the
> devel
> > branch of github.com/utilite-computer, thinking that those changes were
> > based off the vanilla 3.10 kernel. Those changes are actually based on
> the
> > Freescale 3.10 kernel. I pulled a Freescale patch that is obviously
> missing:
> > "ENGR00276249-1 ARM: imx6q: Add missing baud clock for ssi" I also
> switched
>
> The baud clock patch is present in 3.18-rc1:
>
> commit 935632e9938e3e286b9c62a7e54d35c428533cc9
> Author: Shengjiu Wang <shengjiu.wang at freescale.com>
> Date:   Tue Sep 9 17:13:26 2014 +0800
>
>     ARM: dts: imx6qdl: add baud clock and clock-names for ssi
>
>     Baud clock is used for bit clock generation in master mode. Ipg clock
>     is peripheral clock and peripheral access clock.
>
>     Signed-off-by: Shengjiu Wang <shengjiu.wang at freescale.com>
>     Signed-off-by: Shawn Guo <shawn.guo at freescale.c
>
 Awesome!
It's great to see this stuff go mainline.

>
> > back to imx-wm8731.c for the driver. With this setup, the driver
> registers,
> > and speaker-test thinks it plays, however there is no actual sound
> output. I
> > call it progress.
>
> Great progress: some things to check :
>
> 1. audmux settings
>
Well, the imx-wm8731 driver (It's really just glue for loading wm8731) does
have audmux settings in it. These get called during the module probe. Not
sure what might need to change there. My thoughts are that they should be
correct.


>
> 2. Can you try to run 'alsamixer' and make sure that the volume is not
> at the lowest level?
>
Yeah, I've made sure to check alsamixer and turn the volume up. Still no
joy.