ASoC: SOF: ipc4: Add support for Intel HW managed mic privacy messaging

ACE3 (Panther Lake) introduced support for microphone privacy feature which
can - in hardware - mute incoming audio data based

ASoC: SOF: ipc4: Add support for Intel HW managed mic privacy messaging

ACE3 (Panther Lake) introduced support for microphone privacy feature which
can - in hardware - mute incoming audio data based on a state of a physical
switch.
The change in the privacy state is delivered through interface IP blocks
and can only be handled by the link owner.
In Intel platforms Soundwire is for example host owned, so the interrupt
can only be handled by the host.

Since the input stream is going to be muted by hardware, the host needs to
send a message to firmware about the change in privacy so it can execute a
fade out/in to enhance user experience.

The support for microphone privacy can be queried from the HW_CONFIG data
under the INTEL_MIC_PRIVACY_CAP tuple. This is Intel specific data, the
core will pass it to platform code if the intel_configure_mic_privacy()
callback is provided.

Platform code can call sof_ipc4_mic_privacy_state_change() to send the IPC
message to the firmware on state change.

Signed-off-by: Peter Ujfalusi <[email protected]>
Reviewed-by: Ranjani Sridharan <[email protected]>
Reviewed-by: Liam Girdwood <[email protected]>
Reviewed-by: Kai Vehmanen <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Mark Brown <[email protected]>

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