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

[Valentin Raevsky]

On 10/22/2014 01:37 AM, Jonathan Bennett wrote:
>
>
> On Tue, Oct 21, 2014 at 1:49 PM, Jonathan Bennett <jbscience87 at gmail.com
> <mailto:jbscience87 at gmail.com>> wrote:
>
>
>
>     On Tue, Oct 21, 2014 at 1:12 PM, Fabio Estevam <festevam at gmail.com
>     <mailto:festevam at gmail.com>> wrote:
>
>         On Tue, Oct 21, 2014 at 4:04 PM, Jonathan Bennett
>         <jbscience87 at gmail.com <mailto:jbscience87 at gmail.com>> wrote:
>
>         > I realized something just last night. I was grabbing changes from the devel
>         > branch ofgithub.com/utilite-computer
>         <http://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
>         <mailto: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
>         <mailto: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.
>
>
> I have rebased to 3.18 rc-1. It has simplified the patch set a bit, as
> more of  the Freescale things have hit mainline.
> http://pastebin.com/C652GKe3 is my patchset.
> Again, the card registers and thinks it plays, but there is no actual
> output.
Make sure that "Output Mixer HiFi Playback Switch" is on
Issue:
# amixer cset numid=14,iface=MIXER,name='Output Mixer HiFi Playback 
Switch' on
# alsactl store wm8731audio

>
>
>         > 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.
>
>