[RFC]topology: Add nocodec demux test tplg

[xiulipan]

This test topology test with 4ch to 2ch demux.

Signed-off-by: Pan Xiuli xiuli.pan@linux.intel.com

[juimonen]

@xiulipan so what's the idea with channels, so which channel is copied to where? Now the matrix seems to indicate copy input channels 1 & 2 to output 1 & 2. input channels 3 & 4 are not copied anywhere... is this the purpose? So you only want to extract 1&2 from input to output?

[xiulipan]

@juimonen Yes, that was the use case for the SMART_AMP and DEMUX.

[lgirdwood]

@xiulipan can you make this clear in PR and topology comments that chans 3 & 4 are dropped.
Btw, if you are looking at demux can you remove the mixing from it #2687 before anybody uses it. It's very inefficient code.

[xiulipan]

@lgirdwood Got that will update the the comments.
Will try to raise the issue in bug scrape meeting to remove the mixing.

[bkokoszx]

@xiulipan
I have one question, maybe I am missing something. Why we set here DAI format to s16le? Maybe better it will be to set DAI and SSP TDM format to s32_le. In that case, DAI will make PCM conversion if required. In #2959 case, when we will try to play s16, DAI should make conversion from s16 to s32.

[zrombel]

Due to recent PR #3194 merge, please rebase for TGL Multicore tests to Pass on Internal CI.

[lgirdwood]

@xiulipan ping ?