[Sound-open-firmware] Multiple configurations per DAI in topology

[Dragos Tarcatu]

Hi Pierre,
> There are two issues here:
> 1. we really want the topology to contain more than one configuration, 
> and let the kernel pass the relevant one based on current usage so 
> that the correct bclk, mclk etc are used. This is not supported 
> currently. I just re-added this issue for the Linux kernel and topoplogy.
>
> 2. the PR 630 https://github.com/thesofproject/sof/issues/630 is about 
> combining or splitting information between DAIs, or possibly from a 
> single TDM DAI. This is more of a firmware logic part, not really 
> something related to the configuration of the hardware registers 
> controlling the interface.
>
> Does this help?
> Regards
> -Pierre

Yeah, that's what I wanted to find out. I've spent some time today 
looking a bit more throughout the firmware and drivers and it seems to 
me that the SSP configuration is being set up once when the DAI link is 
being created, am I right? And if I'm not mistaken, that's only 
happening when the topology is being processed by sending some IPC 
message from the driver.

Thanks,
     Dragoș