From a8f8201c90db4bdb01175e2cbd41c27f9309ed86 Mon Sep 17 00:00:00 2001
From: XDA-Bam <1209896+XDA-Bam@users.noreply.github.com>
Date: Sat, 3 Apr 2021 02:11:22 +0200
Subject: [PATCH] Update u8g / AVR display timing defaults (#21518)

---
 Marlin/src/lcd/dogm/ultralcd_st7920_u8glib_rrd_AVR.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Marlin/src/lcd/dogm/ultralcd_st7920_u8glib_rrd_AVR.cpp b/Marlin/src/lcd/dogm/ultralcd_st7920_u8glib_rrd_AVR.cpp
index 1e19bf85e5..24baae221e 100644
--- a/Marlin/src/lcd/dogm/ultralcd_st7920_u8glib_rrd_AVR.cpp
+++ b/Marlin/src/lcd/dogm/ultralcd_st7920_u8glib_rrd_AVR.cpp
@@ -34,9 +34,9 @@
 #include "ultralcd_st7920_u8glib_rrd_AVR.h"
 
 #if F_CPU >= 20000000
-  #define CPU_ST7920_DELAY_1 DELAY_NS(0)
+  #define CPU_ST7920_DELAY_1 DELAY_NS(150)
   #define CPU_ST7920_DELAY_2 DELAY_NS(0)
-  #define CPU_ST7920_DELAY_3 DELAY_NS(50)
+  #define CPU_ST7920_DELAY_3 DELAY_NS(150)
 #elif MB(3DRAG, K8200, K8400)
   #define CPU_ST7920_DELAY_1 DELAY_NS(0)
   #define CPU_ST7920_DELAY_2 DELAY_NS(188)
@@ -58,9 +58,9 @@
   #define CPU_ST7920_DELAY_2 DELAY_NS(40)
   #define CPU_ST7920_DELAY_3 DELAY_NS(340)
 #elif F_CPU == 16000000
-  #define CPU_ST7920_DELAY_1 DELAY_NS(0)
+  #define CPU_ST7920_DELAY_1 DELAY_NS(125)
   #define CPU_ST7920_DELAY_2 DELAY_NS(0)
-  #define CPU_ST7920_DELAY_3 DELAY_NS(63)
+  #define CPU_ST7920_DELAY_3 DELAY_NS(125)
 #else
   #error "No valid condition for delays in 'ultralcd_st7920_u8glib_rrd_AVR.h'"
 #endif