drm/amd/powerplay: add error message to remind user updating firmware

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/smumgr/vega10_smumgr.c

@@ -369,8 +369,11 @@ static int vega10_verify_smc_interface(struct pp_smumgr *smumgr)
 			"Attempt to read SMC IF Version Number Failed!",
 			return -1);
 
-	if (smc_driver_if_version != SMU9_DRIVER_IF_VERSION)
-		return -1;
+	if (smc_driver_if_version != SMU9_DRIVER_IF_VERSION) {
+		pr_err("Your firmware(0x%x) doesn't match SMU9_DRIVER_IF_VERSION(0x%x). Please update your firmware!\n",
+		       smc_driver_if_version, SMU9_DRIVER_IF_VERSION);
+		return -EINVAL;
+	}
 
 	return 0;
 }