[PATCH] ASoC: SOF: build compression interface into snd_sof.ko

[Pierre-Louis Bossart]

On 11/8/21 5:11 AM, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd at arndb.de>
> 
> With CONFIG_SND_SOC_SOF_COMPRESS=m, the compression code is
> not built into a the main SOF driver when that is built-in:
> 
> x86_64-linux-ld: sound/soc/sof/ipc.o: in function `ipc_stream_message':
> ipc.c:(.text+0x5a2): undefined reference to `snd_sof_compr_fragment_elapsed'
> x86_64-linux-ld: sound/soc/sof/topology.o: in function `sof_dai_load':
> topology.c:(.text+0x32d1): undefined reference to `snd_sof_compr_init_elapsed_work'
> x86_64-linux-ld: topology.c:(.text+0x32e1): undefined reference to `snd_sof_compr_init_elapsed_work'
> 
> Make this a 'bool' symbol so it just decides whether the
> code gets built at all.
> 
> Fixes: 858f7a5c45ca ("ASoC: SOF: Introduce fragment elapsed notification API")
> Signed-off-by: Arnd Bergmann <arnd at arndb.de>

It's Monday morning and my memory is still foggy but I think we fixed
this problem with https://github.com/thesofproject/linux/pull/3180,
where we changed the Kconfigs for i.MX. We haven't sent this update
upstream for some reason.

Arnd, can you share the configuration that breaks with the existing
upstream code, I can check if the problem still exists.

Thanks!