Support DMIC mute LED and volume mute function on IPC4 firmware/topology#8740
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lgirdwood merged 4 commits intothesofproject:mainfrom Feb 8, 2024
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I'm asked to add a mixer switch for MIC LED mute control so I studied how it is supported on IPC3 then add missing code to IPC4 firmware and topology.
Three missing parts are identified and restored:
FW and TPLG are tested on MTL chromebook with chrome-v6.6 kernel. DMIC recording could be mute/unmute by mixer switch.
A side effect is the gain widget is default muted. Machines using PCH DMIC need to update UCM config to control 'Dmic0 Capture Switch' mixer properly.