Changes in v4:
No changes to ALSA core and hda patches
'probe' source added in patch "ASoC: SOF: Implement Probe IPC API" now only compiled if SND_SOC_SOF_DEBUG_PROBES is enabled. Said kconfig initial declaration has been moved to that patch too
'extractor_stream_tag' field now decorated with _DEBUG_PROBES to account for the change above
Debugfs probe handlers now check if extractor stream is running before continuing. To achieve this, 'extractor_stream_tag' is both initialized and set to SOF_PROBE_INVALID_NODE_ID on sof_probe_compr_free(). Suggestion provided by Pierre
Reverted SND_SOC_SOF_HDA_LINK requirement-removal change for HDA probes. Code requires SND_HDA_EXT_CORE in order to function on Intel platforms
Sorry Cezary, I am not ok with this revert and the dependency on HDA_LINK, see comment on Patch 9. We can talk on Monday on this to look at alternate solutions, no need for multiple emails.
Also the types used in Patch 6 need a bit more work.
The rest looks fine, thanks! -Pierre