ASoC: SOF: register client device for test IPC client

After FW boot is complete, register the client
device for the IPC test client.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

Author: ranj063

sound/soc/sof/core.c

@@ -10,8 +10,10 @@
 
 #include <linux/firmware.h>
 #include <linux/module.h>
+#include <linux/virtual_bus.h>
 #include <sound/soc.h>
 #include <sound/sof.h>
+#include "sof-client.h"
 #include "sof-priv.h"
 #include "ops.h"
 #if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_PROBES)
@@ -95,6 +97,9 @@ void snd_sof_get_status(struct snd_sof_dev *sdev, u32 panic_code,
 }
 EXPORT_SYMBOL(snd_sof_get_status);
 
+static void sof_virtdev_release(struct virtbus_device *vdev)
+{}
+
 /*
  *			FW Boot State Transition Diagram
  *
@@ -138,6 +143,7 @@ EXPORT_SYMBOL(snd_sof_get_status);
 static int sof_probe_continue(struct snd_sof_dev *sdev)
 {
 	struct snd_sof_pdata *plat_data = sdev->pdata;
+	struct virtbus_device *vdev;
 	int ret;
 
 	/* probe the DSP hardware */
@@ -234,6 +240,22 @@ static int sof_probe_continue(struct snd_sof_dev *sdev)
 	if (ret < 0)
 		goto fw_trace_err;
 
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST)
+	/*
+	 * Now register client devices. Only one for now.
+	 * This can fail but errors cannot be propagated.
+	 */
+	vdev = &sdev->ipc_test_client.vdev;
+	vdev->name = "sof-ipc-test";
+	vdev->dev.parent = sdev->dev;
+	vdev->release = sof_virtdev_release;
+
+	ret = sof_client_dev_register(&sdev->ipc_test_client);
+	if (ret)
+		dev_err(sdev->dev,
+			"error: failed to register client device: %s\n",
+			vdev->name);
+#endif
 	/*
 	 * Some platforms in SOF, ex: BYT, may not have their platform PM
 	 * callbacks set. Increment the usage count so as to
@@ -353,6 +375,9 @@ int snd_sof_device_remove(struct device *dev)
 		snd_sof_free_trace(sdev);
 	}
 
+	/* unregister client devices */
+	sof_client_dev_unregister(&sdev->ipc_test_client);
+
 	/*
 	 * Unregister machine driver. This will unbind the snd_card which
 	 * will remove the component driver and unload the topology

sound/soc/sof/sof-priv.h

@@ -18,6 +18,7 @@
 #include <sound/sof/pm.h>
 #include <sound/sof/trace.h>
 #include <uapi/sound/sof/fw.h>
+#include "sof-client.h"
 
 /* debug flags */
 #define SOF_DBG_ENABLE_TRACE	BIT(0)
@@ -438,6 +439,8 @@ struct snd_sof_dev {
 
 	bool msi_enabled;
 
+	struct sof_client_dev ipc_test_client;
+
 	void *private;			/* core does not touch this */
 };