audio: mic_privacy: Fix DSP panic during D3 entry with HW managed mode

When transitioning to D3 state with a pipeline containing a DAI that
supports microphone privacy but is in HW-managed mode, the DSP can
panic. This occurs because the mic_privacy_get_mic_disable_status()
function is called unconditionally during suspend/resume regardless of
the privacy mode.

Fix the issue by explicitly checking for
mic_privacy_manager_get_policy() == MIC_PRIVACY_FW_MANAGED before
attempting to save/restore the mic disable status. This ensures we only
interact with the privacy status when the firmware is responsible for
managing it, and allows HW-managed configurations to properly transit
through D3 power states without exceptions.

This is a small but critical fix to the previous microphone privacy D3
resume patch, addressing panic cases observed with HDA and SoundWire
interfaces.

Signed-off-by: Tomasz Leman <tomasz.m.leman@intel.com>

Author: tmleman

zephyr/lib/cpu.c

@@ -87,7 +87,7 @@ static void suspend_dais(void)
 		mod = comp_mod(icd->cd);
 		cd = module_get_private_data(mod);
 #if CONFIG_INTEL_ADSP_MIC_PRIVACY
-		if (cd->mic_priv)
+		if (cd->mic_priv && mic_privacy_manager_get_policy() == MIC_PRIVACY_FW_MANAGED)
 			mic_disable_status = mic_privacy_get_mic_disable_status();
 #endif
 		dd = cd->dd[0];
@@ -125,7 +125,7 @@ static void resume_dais(void)
 		}
 
 #if CONFIG_INTEL_ADSP_MIC_PRIVACY
-		if (cd->mic_priv) {
+		if (cd->mic_priv && mic_privacy_manager_get_policy() == MIC_PRIVACY_FW_MANAGED) {
 			uint32_t current_mic_status = mic_privacy_get_mic_disable_status();
 
 			if (mic_disable_status != current_mic_status) {