- /* Do we need to support Multi cpu for FE? */
- for_each_rtd_cpu_dai(fe, i, fe_cpu_dai) {
if (fe_cpu_dai->active) {err = soc_pcm_apply_symmetry(fe_substream,fe_cpu_dai);
if (err < 0)return err;}that part seems inconsistent with Patch 4 where you add warnings/error everywhere there's a FE with num_cpus>1
Actually, I have a question here. Do we need to support Multi cpu for FE? If yes, what is the use case?
I can't think of any case where we'd need a multi-cpu FE, and if you look at the existing code it doesn't look possible:
we have code in soc-dapm.c that checks that num_cpus==num_codecs and flags an error if you had 2 cpu_dais and 1 codec_dai.
And if you continue with soc-topology, we have hard-coded num_cpus = 1; and num_codecs = 1; for topology-created FE dailinks.
In other words, we'd a major topology change to support a multi-cpu FE, quite unlikely for now.
The multi-cpu representation is IMO only needed for specific hardware setups, just like the multi-codec part is tied to TDM usages.