drm/i915/guc: Update Guc messages on load failure

In case of GuC firmware loading failure we were reporting
DRM_ERROR also for case when GuC loading was not strictly
required.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171016144724.17244-14-michal.wajdeczko@intel.com

drivers/gpu/drm/i915/intel_uc.c

@@ -250,20 +250,21 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
 err_guc:
 	i915_ggtt_disable_guc(dev_priv);
 
-	DRM_ERROR("GuC init failed\n");
 	if (i915_modparams.enable_guc_loading > 1 ||
-	    i915_modparams.enable_guc_submission > 1)
+	    i915_modparams.enable_guc_submission > 1) {
+		DRM_ERROR("GuC init failed. Firmware loading disabled.\n");
 		ret = -EIO;
-	else
+	} else {
+		DRM_NOTE("GuC init failed. Firmware loading disabled.\n");
 		ret = 0;
+	}
 
 	if (i915_modparams.enable_guc_submission) {
 		i915_modparams.enable_guc_submission = 0;
 		DRM_NOTE("Falling back from GuC submission to execlist mode\n");
 	}
 
 	i915_modparams.enable_guc_loading = 0;
-	DRM_NOTE("GuC firmware loading disabled\n");
 
 	return ret;
 }