ASoC: SOF: Bring WoV support to ipc4

[jsarha]

I have not tested this any further than that the topology properties correctly set spcm->stream[dir].d0i3_compatible flag. That in addition to setting ipc4-pcm .d0i3_supported_in_s0ix = true , should - at least in theory - bring the same support we already have for ipc3 also to ipc4.

The correct place the enable the WoV is to put playback_compatible_d0i3 or capture_compatible_d0i3 tuple with non zero value to host-copier topology widget. For example:

		Object.Pipeline.gain-copier-capture [
			{
				index 	7

				Object.Widget.host-copier.1 {
					stream_name 'SSP0 Capture'
					pcm_id $SSP0_PCM_ID
					num_input_audio_formats 1
					num_output_audio_formats 7
					capture_compatible_d0i3 1
					Object.Base.input_audio_format [
...

I still need to come up with a setup to test this, but that will go to next week.

FYI @lgirdwood @singalsu

[jsarha]

I managed to establish that this indeed works on my PTL-upx. At least if I tag a capture PCM host-copier with 'capture_compatible_d0i3 1' property, and have a capture running when suspending to s2idle, the DSP remains running. And if the DSP sends a SOF_IPC4_NOTIFY_PHRASE_DETECTED to the host, it wakes up. The reason why my first hack test did not work was that the SOF driver pauses the capture before suspending. I assume that is Ok, and the WoV should deal with the pause command correctly.

So I think this is ready for review.

[Copilot]

Pull request overview

This PR extends Sound Open Firmware (SOF) IPC4 topology/PCM handling to support Wake-on-Voice (WoV)-style D0i3 compatibility signaling, aligning IPC4 behavior with the existing IPC3 capability.

Changes:

• Adds new IPC4 token groups to parse per-stream D0i3 compatibility properties from host-copier widget tuples.
• Updates IPC4 host-copier PCM widget setup to set spcm->stream[dir].d0i3_compatible based on the new tokens.
• Enables ipc4_pcm_ops.d0i3_supported_in_s0ix to allow DSP D0i3 during S0iX for IPC4.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
sound/soc/sof/sof-audio.h	Adds new token-group IDs for IPC4 stream D0i3 compatibility parsing.
sound/soc/sof/ipc4-topology.c	Defines/installs the new token groups and parses the D0i3 compatibility flag for IPC4 host-copier PCMs.
sound/soc/sof/ipc4-pcm.c	Enables d0i3_supported_in_s0ix for IPC4 PCM ops.

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