soundwire/SOF: Intel: Add suppoirt for printing ACE3+ PVCCS (mic privacy) register in register dump

drivers/soundwire/intel.h

@@ -22,6 +22,7 @@ struct hdac_bus;
  * @shim_lock: mutex to handle access to shared SHIM registers
  * @shim_mask: global pointer to check SHIM register initialization
  * @clock_stop_quirks: mask defining requested behavior on pm_suspend
+ * @mic_privacy: ACE version supports microphone privacy
  * @link_mask: global mask needed for power-up/down sequences
  * @cdns: Cadence master descriptor
  * @list: used to walk-through all masters exposed by the same controller
@@ -42,6 +43,7 @@ struct sdw_intel_link_res {
 	struct mutex *shim_lock; /* protect shared registers */
 	u32 *shim_mask;
 	u32 clock_stop_quirks;
+	bool mic_privacy;
 	u32 link_mask;
 	struct sdw_cdns *cdns;
 	struct list_head list;

drivers/soundwire/intel_ace2x_debugfs.c

@@ -76,6 +76,12 @@ static int intel_reg_show(struct seq_file *s_file, void *data)
 	ret += intel_sprintf(vs_s, false, buf, ret, SDW_SHIM2_INTEL_VS_IOCTL);
 	ret += intel_sprintf(vs_s, false, buf, ret, SDW_SHIM2_INTEL_VS_ACTMCTL);
 
+	if (sdw->link_res->mic_privacy) {
+		ret += scnprintf(buf + ret, RD_BUF - ret, "\nVS PVCCS\n");
+		ret += intel_sprintf(vs_s, false, buf, ret,
+				     SDW_SHIM2_INTEL_VS_PVCCS);
+	}
+
 	seq_printf(s_file, "%s", buf);
 	kfree(buf);
 

drivers/soundwire/intel_init.c

@@ -77,6 +77,7 @@ static struct sdw_intel_link_dev *intel_link_dev_register(struct sdw_intel_res *
 		link->shim = res->mmio_base +  SDW_SHIM2_GENERIC_BASE(link_id);
 		link->shim_vs = res->mmio_base + SDW_SHIM2_VS_BASE(link_id);
 		link->shim_lock = res->eml_lock;
+		link->mic_privacy = res->mic_privacy;
 	}
 
 	link->ops = res->ops;

include/linux/soundwire/sdw_intel.h

@@ -189,6 +189,9 @@
 #define SDW_SHIM3_INTEL_VS_ACTMCTL_DOAISE2	BIT(14)
 #define SDW_SHIM3_INTEL_VS_ACTMCTL_CLDE		BIT(15)
 
+/* ACE3+ Mic privacy control and status register */
+#define SDW_SHIM2_INTEL_VS_PVCCS		0x10
+
 /**
  * struct sdw_intel_stream_params_data: configuration passed during
  * the @params_stream callback, e.g. for interaction with DSP
@@ -331,6 +334,7 @@ struct sdw_intel_ctx {
  * @shim_base: sdw shim base.
  * @alh_base: sdw alh base.
  * @ext: extended HDaudio link support
+ * @mic_privacy: ACE version supports microphone privacy
  * @hbus: hdac_bus pointer, needed for power management
  * @eml_lock: mutex protecting shared registers in the HDaudio multi-link
  * space
@@ -349,6 +353,7 @@ struct sdw_intel_res {
 	u32 shim_base;
 	u32 alh_base;
 	bool ext;
+	bool mic_privacy;
 	struct hdac_bus *hbus;
 	struct mutex *eml_lock;
 };

sound/soc/sof/intel/hda.c

@@ -192,6 +192,9 @@ static int hda_sdw_probe(struct snd_sof_dev *sdev)
 		res.ext = true;
 		res.ops = &sdw_ace2x_callback;
 
+		/* ACE3+ supports microphone privacy */
+		if (chip->hw_ip_version >= SOF_INTEL_ACE_3_0)
+			res.mic_privacy = true;
 	}
 	res.irq = sdev->ipc_irq;
 	res.handle = hdev->info.handle;