diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
index dccddd264436..242cb1c983c0 100644
--- a/drivers/video/omap2/dss/apply.c
+++ b/drivers/video/omap2/dss/apply.c
@@ -834,11 +834,35 @@ out:
 	mutex_unlock(&apply_lock);
 }
 
+static int dss_mgr_simple_check(struct omap_overlay_manager *mgr,
+		const struct omap_overlay_manager_info *info)
+{
+	if (dss_has_feature(FEAT_ALPHA_FIXED_ZORDER)) {
+		/*
+		 * OMAP3 supports only graphics source transparency color key
+		 * and alpha blending simultaneously. See TRM 15.4.2.4.2.2
+		 * Alpha Mode.
+		 */
+		if (info->partial_alpha_enabled && info->trans_enabled
+			&& info->trans_key_type != OMAP_DSS_COLOR_KEY_GFX_DST) {
+			DSSERR("check_manager: illegal transparency key\n");
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
 int dss_mgr_set_info(struct omap_overlay_manager *mgr,
 		struct omap_overlay_manager_info *info)
 {
 	struct mgr_priv_data *mp = get_mgr_priv(mgr);
 	unsigned long flags;
+	int r;
+
+	r = dss_mgr_simple_check(mgr, info);
+	if (r)
+		return r;
 
 	spin_lock_irqsave(&data_lock, flags);