ASoC: Intel: Skylake: Make DSP replies more human readable

Add more meaning to the IPC replies for easy debugging. Replace the switch
case with a lookup table to lookup for the IPC replies and print in human
readable form.
Signed-off-by: NSubhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: NSriram Periyasamy <sriramx.periyasamy@intel.com>
Signed-off-by: NVinod Koul <vinod.koul@intel.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/intel/skylake/skl-sst-ipc.c

@@ -392,18 +392,43 @@ int skl_ipc_process_notification(struct sst_generic_ipc *ipc,
 	return 0;
 }
 
-static int skl_ipc_set_reply_error_code(u32 reply)
+struct skl_ipc_err_map {
+	const char *msg;
+	enum skl_ipc_glb_reply reply;
+	int err;
+};
+
+static struct skl_ipc_err_map skl_err_map[] = {
+	{"DSP out of memory", IPC_GLB_REPLY_OUT_OF_MEMORY, -ENOMEM},
+	{"DSP busy", IPC_GLB_REPLY_BUSY, -EBUSY},
+};
+
+static int skl_ipc_set_reply_error_code(struct sst_generic_ipc *ipc, u32 reply)
 {
-	switch (reply) {
-	case IPC_GLB_REPLY_OUT_OF_MEMORY:
-		return -ENOMEM;
+	int i;
 
-	case IPC_GLB_REPLY_BUSY:
-		return -EBUSY;
+	for (i = 0; i < ARRAY_SIZE(skl_err_map); i++) {
+		if (skl_err_map[i].reply == reply)
+			break;
+	}
 
-	default:
+	if (i == ARRAY_SIZE(skl_err_map)) {
+		dev_err(ipc->dev, "ipc FW reply: %d FW Error Code: %u\n",
+				reply,
+				ipc->dsp->fw_ops.get_fw_errcode(ipc->dsp));
 		return -EINVAL;
 	}
+
+	if (skl_err_map[i].err < 0)
+		dev_err(ipc->dev, "ipc FW reply: %s FW Error Code: %u\n",
+				skl_err_map[i].msg,
+				ipc->dsp->fw_ops.get_fw_errcode(ipc->dsp));
+	else
+		dev_info(ipc->dev, "ipc FW reply: %s FW Error Code: %u\n",
+				skl_err_map[i].msg,
+				ipc->dsp->fw_ops.get_fw_errcode(ipc->dsp));
+
+	return skl_err_map[i].err;
 }
 
 void skl_ipc_process_reply(struct sst_generic_ipc *ipc,
@@ -441,10 +466,7 @@ void skl_ipc_process_reply(struct sst_generic_ipc *ipc,
 
 		}
 	} else {
-		msg->errno = skl_ipc_set_reply_error_code(reply);
-		dev_err(ipc->dev, "ipc FW reply: reply=%d\n", reply);
-		dev_err(ipc->dev, "FW Error Code: %u\n",
-			ipc->dsp->fw_ops.get_fw_errcode(ipc->dsp));
+		msg->errno = skl_ipc_set_reply_error_code(ipc, reply);
 		switch (IPC_GLB_NOTIFY_MSG_TYPE(header.primary)) {
 		case IPC_GLB_LOAD_MULTIPLE_MODS:
 		case IPC_GLB_LOAD_LIBRARY: