From c60696dbae3696006cb24bfe1d51254977f4f65b Mon Sep 17 00:00:00 2001
From: Victor Oliveira <rhapsodyv@gmail.com>
Date: Tue, 27 Oct 2020 17:16:35 -0300
Subject: [PATCH] Keep watchdog refreshed in LVGL init (#19900)

---
 Marlin/src/lcd/extui/lib/mks_ui/pic_manager.cpp |  1 +
 .../extui/lib/mks_ui/tft_lvgl_configuration.cpp | 17 ++++++++++-------
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/Marlin/src/lcd/extui/lib/mks_ui/pic_manager.cpp b/Marlin/src/lcd/extui/lib/mks_ui/pic_manager.cpp
index 70c48f5c8e..5ba7722f55 100644
--- a/Marlin/src/lcd/extui/lib/mks_ui/pic_manager.cpp
+++ b/Marlin/src/lcd/extui/lib/mks_ui/pic_manager.cpp
@@ -488,6 +488,7 @@ uint8_t public_buf[512];
   }
 
   void UpdateAssets() {
+    if (!card.isMounted()) return;
     SdFile dir, root = card.getroot();
     if (dir.open(&root, assetsPath, O_RDONLY)) {
 
diff --git a/Marlin/src/lcd/extui/lib/mks_ui/tft_lvgl_configuration.cpp b/Marlin/src/lcd/extui/lib/mks_ui/tft_lvgl_configuration.cpp
index 26f6301763..21e3040c2e 100644
--- a/Marlin/src/lcd/extui/lib/mks_ui/tft_lvgl_configuration.cpp
+++ b/Marlin/src/lcd/extui/lib/mks_ui/tft_lvgl_configuration.cpp
@@ -116,17 +116,20 @@ void tft_lvgl_init() {
   ui_cfg_init();
   disp_language_init();
 
-  //init tft first!
+  watchdog_refresh();     // LVGL init takes time
+
+  // Init TFT first!
   SPI_TFT.spi_init(SPI_FULL_SPEED);
   SPI_TFT.LCD_init();
 
+  watchdog_refresh();     // LVGL init takes time
+
   //spi_flash_read_test();
   #if ENABLED(SDSUPPORT)
-    watchdog_refresh();
     UpdateAssets();
+    watchdog_refresh();   // LVGL init takes time
   #endif
 
-  watchdog_refresh();
   mks_test_get();
 
   touch.Init();
@@ -189,9 +192,11 @@ void tft_lvgl_init() {
 
   lv_encoder_pin_init();
 
+  bool ready = true;
   #if ENABLED(POWER_LOSS_RECOVERY)
     recovery.load();
     if (recovery.valid()) {
+      ready = false;
       if (gCfgItems.from_flash_pic)
         flash_preview_begin = true;
       else
@@ -201,14 +206,12 @@ void tft_lvgl_init() {
 
       strncpy(public_buf_m, recovery.info.sd_filename, sizeof(public_buf_m));
       card.printLongPath(public_buf_m);
-
       strncpy(list_file.long_name[sel_id], card.longFilename, sizeof(list_file.long_name[sel_id]));
-
       lv_draw_printing();
     }
-    else
   #endif
-    lv_draw_ready_print();
+
+  if (ready) lv_draw_ready_print();
 
   if (mks_test_flag == 0x1E)
     mks_gpio_test();