[To Be Dropped][Disregard] legacy: disable pause / release on CHT, BYT, BDW and HSW

[lyakh]

Legacy platforms have insufficient resources to reliably handle stream pausing, and it isn't used by audio servers anyway, so it can be safely disabled on them.

[lyakh]

CI: as expected, pause-resume tests now fail on BYT https://sof-ci.01.org/sofpr/PR5861/build498/devicetest/?model=BYT_MB_NOCODEC&testcase=check-pause-resume-playback-10

[lgirdwood]

CI: as expected, pause-resume tests now fail on BYT https://sof-ci.01.org/sofpr/PR5861/build498/devicetest/?model=BYT_MB_NOCODEC&testcase=check-pause-resume-playback-10

I was chatting last night to @ranj063 about this and I think it may be better if we convert IPC_PAUSE to STOP and IPC_RELEASE to START in the IPC layer. This would mean userspace would see no error when it tries to PAUSE. Can you give this a try, would be interested to see the CI here.

[lgirdwood]

That's interesting why this would fail for STOP and START. Does this change fail on newer HW too like TGL ? Maybe we have a race ?

[lyakh]

That's interesting why this would fail for STOP and START. Does this change fail on newer HW too like TGL ? Maybe we have a race ?

@lgirdwood you mean why it's failing pause-release tests so early - before even starting to stream? Yeah, I'm surprised too. No logs at all https://sof-ci.01.org/sofpr/PR5861/build504/devicetest/?model=BYT_MB_NOCODEC&testcase=check-pause-resume-playback-10, at least kernel logs should be there

[lyakh]

CI: BYT reported a timeout with this PR with all pause-release tests: https://sof-ci.01.org/sofpr/PR5861/build504/devicetest/?model=BYT_MB_NOCODEC&testcase=check-pause-resume-playback-10 and one of the reasons for this PR was #5836 . BYT is now in maintenance mode, but I'm not sure if we should merge something that was explicitly trying to fix a problem on BYT and instead is supposedly only making it worse

[kv2019i]

No activity in a long time, converting as draft.