[alsa-devel] [PATCH] ASoC: topology: Increase SND_SOC_TPLG_NUM_TEXTS to 32

[Pierre-Louis Bossart]

On 7/20/18 5:27 AM, Puneeth Prabhu wrote:
> Topology supports maximum of 32 configs for a path
> whereas kernel can support only 16 configs of a path.
> So, increase SND_SOC_TPLG_NUM_TEXTS to 32 to support 32
> configs for a path.

What do you mean by "Topology supports maximum of 32 configs for a 
path"? I checked in alsa-lib and the same value of 16 is used.
I don't get how a change at the kernel level is going to help if the 
information generated by alsatplg uses a different structure.

I also don't get how you enable this change, the code in skl-topology 
only accesses the .priv structure in the enum, but if you change the 
size of the texts array then all your pointers are incorrect so you'd 
handle garbage data.

> 
> Signed-off-by: Puneeth Prabhu <puneethx.prabhu at intel.com>
> Signed-off-by: Pardha Saradhi K <pardha.saradhi.kesapragada at intel.com>
> ---
>   include/uapi/sound/asoc.h | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/uapi/sound/asoc.h b/include/uapi/sound/asoc.h
> index a74ca23..5b1411b 100644
> --- a/include/uapi/sound/asoc.h
> +++ b/include/uapi/sound/asoc.h
> @@ -88,7 +88,7 @@
>   #define SND_SOC_TPLG_MAGIC		0x41536F43 /* ASoC */
>   
>   /* string sizes */
> -#define SND_SOC_TPLG_NUM_TEXTS		16
> +#define SND_SOC_TPLG_NUM_TEXTS		32
>   
>   /* ABI version */
>   #define SND_SOC_TPLG_ABI_VERSION	0x5	/* current version */
>