diff --git a/Marlin/src/inc/Conditionals_LCD.h b/Marlin/src/inc/Conditionals_LCD.h
index b11ede3dc5..f012bd9e36 100644
--- a/Marlin/src/inc/Conditionals_LCD.h
+++ b/Marlin/src/inc/Conditionals_LCD.h
@@ -488,13 +488,8 @@
   #endif
 #endif
 
-// Serial Controllers require LCD_SERIAL_PORT
-#if ANY(HAS_DGUS_LCD, MALYAN_LCD, ANYCUBIC_LCD_I3MEGA, ANYCUBIC_LCD_CHIRON, NEXTION_TFT)
-  #define LCD_NEEDS_SERIAL_PORT 1
-#endif
-
 // Extensible UI serial touch screens. (See src/lcd/extui)
-#if EITHER(LCD_NEEDS_SERIAL_PORT, TOUCH_UI_FTDI_EVE)
+#if ANY(HAS_DGUS_LCD, MALYAN_LCD, ANYCUBIC_LCD_I3MEGA, ANYCUBIC_LCD_CHIRON, NEXTION_TFT, TOUCH_UI_FTDI_EVE)
   #define IS_EXTUI 1
   #define EXTENSIBLE_UI
 #endif
@@ -506,18 +501,22 @@
 #if EITHER(HAS_DWIN_E3V2_BASIC, DWIN_CREALITY_LCD_JYERSUI)
   #define HAS_DWIN_E3V2 1
 #endif
-#if ENABLED(DWIN_LCD_PROUI)
-  #define DO_LIST_BIN_FILES 1
-#endif
 
 // E3V2 extras
 #if HAS_DWIN_E3V2 || IS_DWIN_MARLINUI
   #define SERIAL_CATCHALL 0
   #define HAS_LCD_BRIGHTNESS 1
   #define LCD_BRIGHTNESS_MAX 250
-  #if ENABLED(DWIN_LCD_PROUI)
-    #define LCD_BRIGHTNESS_DEFAULT 127
-  #endif
+#endif
+
+#if ENABLED(DWIN_LCD_PROUI)
+  #define DO_LIST_BIN_FILES 1
+  #define LCD_BRIGHTNESS_DEFAULT 127
+#endif
+
+// Serial Controllers require LCD_SERIAL_PORT
+#if ANY(IS_DWIN_MARLINUI, HAS_DWIN_E3V2, HAS_DGUS_LCD, MALYAN_LCD, ANYCUBIC_LCD_I3MEGA, ANYCUBIC_LCD_CHIRON, NEXTION_TFT)
+  #define LCD_IS_SERIAL_HOST 1
 #endif
 
 #if HAS_WIRED_LCD
diff --git a/Marlin/src/inc/Conditionals_adv.h b/Marlin/src/inc/Conditionals_adv.h
index 929a7c78cf..119d69ee3d 100644
--- a/Marlin/src/inc/Conditionals_adv.h
+++ b/Marlin/src/inc/Conditionals_adv.h
@@ -1203,17 +1203,16 @@
 #endif
 
 /**
- * LCD_SERIAL_PORT must be defined ahead of HAL.h
+ * LCD_SERIAL_PORT must be defined ahead of HAL.h and
+ * currently HAL.h must be included ahead of pins.h.
  */
-#ifndef LCD_SERIAL_PORT
-  #if HAS_DWIN_E3V2 || IS_DWIN_MARLINUI || HAS_DGUS_LCD
-    #if MB(BTT_SKR_MINI_E3_V1_0, BTT_SKR_MINI_E3_V1_2, BTT_SKR_MINI_E3_V2_0, BTT_SKR_MINI_E3_V3_0, BTT_SKR_E3_TURBO, BTT_OCTOPUS_V1_1)
-      #define LCD_SERIAL_PORT 1
-    #elif MB(CREALITY_V24S1_301, CREALITY_V24S1_301F4, CREALITY_V423, MKS_ROBIN)
-      #define LCD_SERIAL_PORT 2 // Creality Ender3S1, MKS Robin
-    #else
-      #define LCD_SERIAL_PORT 3 // Other boards
-    #endif
+#if LCD_IS_SERIAL_HOST && !defined(LCD_SERIAL_PORT)
+  #if MB(BTT_SKR_MINI_E3_V1_0, BTT_SKR_MINI_E3_V1_2, BTT_SKR_MINI_E3_V2_0, BTT_SKR_MINI_E3_V3_0, BTT_SKR_E3_TURBO, BTT_OCTOPUS_V1_1)
+    #define LCD_SERIAL_PORT 1
+  #elif MB(CREALITY_V24S1_301, CREALITY_V24S1_301F4, CREALITY_V423, MKS_ROBIN, PANOWIN_CUTLASS, KODAMA_BARDO)
+    #define LCD_SERIAL_PORT 2
+  #else
+    #define LCD_SERIAL_PORT 3
   #endif
   #ifdef LCD_SERIAL_PORT
     #define AUTO_ASSIGNED_LCD_SERIAL 1
diff --git a/Marlin/src/pins/ramps/pins_PANOWIN_CUTLASS.h b/Marlin/src/pins/ramps/pins_PANOWIN_CUTLASS.h
index cc651cc8ef..11451e95a4 100755
--- a/Marlin/src/pins/ramps/pins_PANOWIN_CUTLASS.h
+++ b/Marlin/src/pins/ramps/pins_PANOWIN_CUTLASS.h
@@ -102,13 +102,6 @@
   #define SPINDLE_LASER_ENA_PIN               74  // J7
 #endif
 
-//
-// Serial LCD
-//
-#if LCD_NEEDS_SERIAL_PORT && !defined(LCD_SERIAL_PORT)
-  #define LCD_SERIAL_PORT                      2  // D16 H1 (TX2), D17 H0 (RX2)
-#endif
-
 //
 // SD Card
 //
diff --git a/Marlin/src/pins/stm32f1/pins_CREALITY_V521.h b/Marlin/src/pins/stm32f1/pins_CREALITY_V521.h
index e54469afff..81cb1e1f79 100644
--- a/Marlin/src/pins/stm32f1/pins_CREALITY_V521.h
+++ b/Marlin/src/pins/stm32f1/pins_CREALITY_V521.h
@@ -219,8 +219,3 @@
   #endif
 
 #endif
-
-// DGUS LCDs
-#if HAS_DGUS_LCD
-  #define LCD_SERIAL_PORT                      3
-#endif