Index: firmware/App/Modes/ModeGenDialysate.c
===================================================================
diff -u -r94789b2f2324d5901685b6ff7b6224d4af3a0276 -r6d4aa77e6b85aa7621a234660f631e725fb1d441
--- firmware/App/Modes/ModeGenDialysate.c	(.../ModeGenDialysate.c)	(revision 94789b2f2324d5901685b6ff7b6224d4af3a0276)
+++ firmware/App/Modes/ModeGenDialysate.c	(.../ModeGenDialysate.c)	(revision 6d4aa77e6b85aa7621a234660f631e725fb1d441)
@@ -7,8 +7,8 @@
 *
 * @file    ModeGenDialysate.c
 *
-* @author  (last)      Vinayakam Mani
-* @date    (last)      14-Apr-2026
+* @author  (last)      Raghu Kallala
+* @date    (last)      22-Apr-2026
 *
 * @author  (original)  Vinayakam Mani
 * @date    (original)  06-Nov-2024
@@ -1302,4 +1302,84 @@
     return result;
 }
 
+/*********************************************************************//**
+ * @brief
+ * The testValidateDDGenDialysateChangeReq function validate whether request
+ * operation sub mode is legal or not.
+ * @details \b Inputs: none
+ * @details \b Outputs: none
+ * @param newSubMode the enumerated sub state of the mode
+ * @return TRUE if request is legal, FALSE if not
+ *************************************************************************/
+BOOL testValidateDDGenDialysateChangeReq( U32 newSubMode )
+{
+    BOOL result = FALSE;
+
+    if ( newSubMode < NUM_OF_DD_GEND_MODE_STATES )
+    {
+        switch ( newSubMode )
+        {
+            // TODO add validate condition after checking with Vinay
+            case DD_GEND_STATE_START:
+            case DD_GEND_DIALYSATE_BYPASS_STATE:
+            case DD_GEND_DIALYSATE_DELIVERY_STATE:
+            case DD_GEND_SPENT_CHAMBER_FILL_STATE:
+                result = TRUE;
+                break;
+
+            case DD_GEND_ISOLATED_UF_STATE:
+            case DD_GEND_BICARB_CHAMBER_FILL_STATE:
+            case DD_GEND_DIALYSATE_DELIVERY_PAUSE:
+            default:
+                break;
+        }
+    }
+
+    return result;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The testSignalNewDDGenDialysateSubMode function request transition
+ * to a new operation sub mode.
+ * @details \b Inputs: none
+ * @details \b Outputs: genDialysateState
+ * @param newSubMode the enumerated sub state of the mode
+ * @return none
+ *************************************************************************/
+void testSignalNewDDGenDialysateSubMode( U32 newSubMode )
+{
+    if ( newSubMode < NUM_OF_DD_GEND_MODE_STATES )
+    {
+        genDialysateState = (DD_GEND_MODE_STATE_T)newSubMode;
+
+        switch ( newSubMode )
+        {
+            // TODO add logic after checking with Vinay
+            // Any of these state require no special handling
+
+            case DD_GEND_DIALYSATE_BYPASS_STATE:
+                isDialDeliveryInProgress.data = FALSE;
+                break;
+
+            case DD_GEND_DIALYSATE_DELIVERY_STATE:
+                isDialDeliveryInProgress.data = TRUE;
+                break;
+
+            case DD_GEND_SPENT_CHAMBER_FILL_STATE:
+                pendingSpentChamberFill = FALSE;
+                isDialDeliveryInProgress.data = FALSE;
+                break;
+
+            case DD_GEND_STATE_START:
+            case DD_GEND_ISOLATED_UF_STATE:
+            case DD_GEND_BICARB_CHAMBER_FILL_STATE:
+            case DD_GEND_DIALYSATE_DELIVERY_PAUSE:
+            default:
+                break;
+        }
+        setModeGenDStateTransition( genDialysateState );
+    }
+}
+
 /**@}*/