[alsa-devel] audio mcbsp1 broken for beagleboard-xm -OMAP

[Peter Ujfalusi]

Hi,

On 02/20/2015 08:45 AM, noman pouigt wrote:
> Hello,
> 
> I am trying to integrate max98090 codec with $subject board.  I am
> running the mcBSP in slave mode as i have not changed the hw_parms for
> omap-twl4030.c file. With below changes i see wait_for_avail is
> getting stuck i.e. mcbsp is not getting any interrupt and nothing is
> playing.

I have tested the XM with twl4030 on linux-next and McBSP is working fine as
slave and master (I have a patch to add the McBSP master support for testing)
also.

> 
> Kernel version:
> VERSION = 3
> PATCHLEVEL = 19
> SUBLEVEL = 0
> EXTRAVERSION =
> NAME = Diseased Newt
> 
> Setup information:
> Using beagle board -xm and connected max98090 codec to mcbsp1 pins.
> Connected only 4 pins.
> 
> Changed the omap-twl4030.c machine file as below to disable the twl4030:
> static struct snd_soc_dai_link omap_twl4030_dai_links[] = {
>        {
> +               .name = "max98090",
> +               .stream_name = "max98090",
>                .cpu_dai_name = "omap-mcbsp.1",

Hrm, mcbsp.1 is not in use by default on the board, 2 and 3 are the one which
is used by the omap-twl4030 driver.

> +               .codec_dai_name = "HiFi",
>                .platform_name = "omap-mcbsp.1",
> +               .codec_name = "max98090.1-0010",
>                .ops = &omap_twl4030_ops,
>        },
> 
> DTSI file change:arch/arm/boot/dts/omap3-beagle-xm.dts
> 
> &i2c2 {
>        clock-frequency = <400000>;
> +
> +       max98090: max98090 at 10 {
> +               compatible = "maxim,max98090";
> +               reg = <0x10>;
> +       };
> };
> 
> omap/omap-twl4030.c
> added in hw_params below function to set internal oscillator for 98090
> for generating PLL for master clock.
> snd_soc_dai_set_sysclk(codec_dai, 26000000, 0, SND_SOC_CLOCK_IN);
> 
> I am able to see that the cpu_dai is mapped with codec_dai and
> configuration is ok. kernel logs at https://ideone.com/oezNSj
> 
> I think i don't need to configure the mcbsp1 pins right as it uses default.

I think you should check the pin mux for the McBSP1 pins. They might not set
to correct mode.

> 
> Please guide me.I have tried IRC channel also but not getting the right folks.
> 
> https://github.com/CircuitCo/BeagleBoard-xM-RevC/blob/master/BeagleBoard-xM_revC_SCH.pdf?raw=true
> 
> Thanks,
> 


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