Enable contrast via LCD_CONTRAST_INIT (#15006)

Marlin/src/inc/Conditionals_LCD.h

@@ -30,9 +30,9 @@
 
   #define DOGLCD
   #define IS_ULTIPANEL
-  #define DEFAULT_LCD_CONTRAST 90
-  #define LCD_CONTRAST_MIN 60
+  #define LCD_CONTRAST_MIN  60
   #define LCD_CONTRAST_MAX 140
+  #define LCD_CONTRAST_INIT 90
 
 #elif ENABLED(ZONESTAR_LCD)
 
@@ -65,23 +65,23 @@
   #if ENABLED(miniVIKI)
     #define LCD_CONTRAST_MIN      75
     #define LCD_CONTRAST_MAX     115
-    #define DEFAULT_LCD_CONTRAST  95
+    #define LCD_CONTRAST_INIT     95
     #define U8GLIB_ST7565_64128N
   #elif ENABLED(VIKI2)
     #define LCD_CONTRAST_MIN       0
     #define LCD_CONTRAST_MAX     255
-    #define DEFAULT_LCD_CONTRAST 140
+    #define LCD_CONTRAST_INIT    140
     #define U8GLIB_ST7565_64128N
   #elif ENABLED(ELB_FULL_GRAPHIC_CONTROLLER)
     #define LCD_CONTRAST_MIN      90
     #define LCD_CONTRAST_MAX     130
-    #define DEFAULT_LCD_CONTRAST 110
+    #define LCD_CONTRAST_INIT    110
     #define U8GLIB_LM6059_AF
     #define SD_DETECT_INVERTED
   #elif ENABLED(AZSMZ_12864)
     #define LCD_CONTRAST_MIN     120
     #define LCD_CONTRAST_MAX     255
-    #define DEFAULT_LCD_CONTRAST 190
+    #define LCD_CONTRAST_INIT    190
     #define U8GLIB_ST7565_64128N
   #endif
 
@@ -128,17 +128,17 @@
 #elif ENABLED(MKS_MINI_12864)
 
   #define MINIPANEL
-  #define DEFAULT_LCD_CONTRAST 150
-  #define LCD_CONTRAST_MAX 255
+  #define LCD_CONTRAST_MAX  255
+  #define LCD_CONTRAST_INIT 150
 
 #elif ANY(FYSETC_MINI_12864_X_X, FYSETC_MINI_12864_1_2, FYSETC_MINI_12864_2_0, FYSETC_MINI_12864_2_1)
 
   #define FYSETC_MINI_12864
   #define DOGLCD
   #define IS_ULTIPANEL
-  #define LCD_CONTRAST_MIN 0
-  #define LCD_CONTRAST_MAX 255
-  #define DEFAULT_LCD_CONTRAST 220
+  #define LCD_CONTRAST_MIN    0
+  #define LCD_CONTRAST_MAX  255
+  #define LCD_CONTRAST_INIT 220
   #define LED_COLORS_REDUCE_GREEN
   #if HAS_POWER_SWITCH && EITHER(FYSETC_MINI_12864_2_0, FYSETC_MINI_12864_2_1)
     #define LED_BACKLIGHT_TIMEOUT 10000
@@ -166,9 +166,9 @@
   #define IS_ULTIPANEL
   #define U8GLIB_SSD1309
   #define LCD_RESET_PIN LCD_PINS_D6 //  This controller need a reset pin
-  #define LCD_CONTRAST_MIN 0
-  #define LCD_CONTRAST_MAX 254
-  #define DEFAULT_LCD_CONTRAST 127
+  #define LCD_CONTRAST_MIN    0
+  #define LCD_CONTRAST_MAX  254
+  #define LCD_CONTRAST_INIT 127
   #define ENCODER_PULSES_PER_STEP 2
   #define ENCODER_STEPS_PER_MENU_ITEM 2
 
@@ -190,8 +190,8 @@
   #if ENABLED(MAKRPANEL)
     #define U8GLIB_ST7565_64128N
   #endif
-  #ifndef DEFAULT_LCD_CONTRAST
-    #define DEFAULT_LCD_CONTRAST 17
+  #ifndef LCD_CONTRAST_INIT
+    #define LCD_CONTRAST_INIT    17
   #endif
 #endif
 
@@ -382,29 +382,6 @@
 #define HAS_ADC_BUTTONS      ENABLED(ADC_KEYPAD)
 
 /**
- * Default LCD contrast for Graphical LCD displays
- */
-#define HAS_LCD_CONTRAST (                \
-     ENABLED(MAKRPANEL)                   \
-  || ENABLED(CARTESIO_UI)                 \
-  || ENABLED(VIKI2)                       \
-  || ENABLED(AZSMZ_12864)                 \
-  || ENABLED(miniVIKI)                    \
-  || ENABLED(ELB_FULL_GRAPHIC_CONTROLLER) \
-)
-#if HAS_LCD_CONTRAST
-  #ifndef LCD_CONTRAST_MIN
-    #define LCD_CONTRAST_MIN 0
-  #endif
-  #ifndef LCD_CONTRAST_MAX
-    #define LCD_CONTRAST_MAX 63
-  #endif
-  #ifndef DEFAULT_LCD_CONTRAST
-    #define DEFAULT_LCD_CONTRAST 32
-  #endif
-#endif
-
-/**
  * Extruders have some combination of stepper motors and hotends
  * so we separate these concepts into the defines:
  *

Marlin/src/inc/Conditionals_post.h

@@ -247,6 +247,22 @@
 #endif
 
 /**
+ * Default LCD contrast for Graphical LCD displays
+ */
+#define HAS_LCD_CONTRAST defined(LCD_CONTRAST_INIT)
+#if HAS_LCD_CONTRAST
+  #ifndef DEFAULT_LCD_CONTRAST
+    #define DEFAULT_LCD_CONTRAST LCD_CONTRAST_INIT
+  #endif
+  #ifndef LCD_CONTRAST_MIN
+    #define LCD_CONTRAST_MIN 0
+  #endif
+  #ifndef LCD_CONTRAST_MAX
+    #define LCD_CONTRAST_MAX MAX(63, LCD_CONTRAST_INIT)
+  #endif
+#endif
+
+/**
  * Override here because this is set in Configuration_adv.h
  */
 #if HAS_LCD_MENU && DISABLED(ELB_FULL_GRAPHIC_CONTROLLER)

Marlin/src/module/configuration_store.cpp

@@ -828,8 +828,10 @@ void MarlinSettings::postprocess() {
       const int16_t lcd_contrast =
         #if HAS_LCD_CONTRAST
           ui.contrast
+        #elif defined(DEFAULT_LCD_CONTRAST)
+          DEFAULT_LCD_CONTRAST
         #else
-          32
+          127
         #endif
       ;
       EEPROM_WRITE(lcd_contrast);

Marlin/src/pins/mega/pins_WANHAO_ONEPLUS.h

@@ -105,9 +105,7 @@
   #define BTN_ENC           5
 
   // This display has adjustable contrast
-  #undef HAS_LCD_CONTRAST
-  #define HAS_LCD_CONTRAST 1
   #define LCD_CONTRAST_MIN       0
   #define LCD_CONTRAST_MAX     255
-  #define DEFAULT_LCD_CONTRAST 255
+  #define LCD_CONTRAST_INIT LCD_CONTRAST_MAX
 #endif

Marlin/src/pins/ramps/pins_TT_OSCAR.h

@@ -436,7 +436,7 @@
       #define DOGLCD_CS    25
 
       // GLCD features
-      //#define LCD_CONTRAST 190
+      //#define LCD_CONTRAST_INIT 190
       // Uncomment screen orientation
       //#define LCD_SCREEN_ROT_90
       //#define LCD_SCREEN_ROT_180
@@ -463,7 +463,7 @@
       #define DOGLCD_CS    66
 
       // GLCD features
-      //#define LCD_CONTRAST 190
+      //#define LCD_CONTRAST_INIT 190
       // Uncomment screen orientation
       //#define LCD_SCREEN_ROT_90
       //#define LCD_SCREEN_ROT_180

Marlin/src/pins/stm32/pins_FYSETC_AIO_II.h

@@ -137,7 +137,7 @@
       #define DOGLCD_CS    PB7
     #endif
 
-    //#define LCD_CONTRAST 190
+    //#define LCD_CONTRAST_INIT 190
     //#define LCD_SCREEN_ROT_90
     //#define LCD_SCREEN_ROT_180
     //#define LCD_SCREEN_ROT_270

Marlin/src/pins/stm32/pins_FYSETC_CHEETAH.h

@@ -140,7 +140,7 @@
     #define RGB_LED_B_PIN  PB6
   #endif
 
-  //#define LCD_CONTRAST   190
+  //#define LCD_CONTRAST_INIT 190
 
   #if ENABLED(NEWPANEL)
     #define BTN_EN1        PC11