fix(core): fixed unwanted delays in T2B1

[no changelog]

core/embed/bootloader/main.c

@@ -307,6 +307,8 @@ int bootloader_main(void) {
 
   display_reinit();
 
+  ui_screen_boot_empty(false);
+
   mpu_config_bootloader();
 
   const image_header *hdr = NULL;
@@ -351,8 +353,6 @@ int bootloader_main(void) {
   display_set_little_endian();
 #endif
 
-  ui_screen_boot_empty(false);
-
 #ifdef USE_I2C
   i2c_init();
 #endif
@@ -426,7 +426,11 @@ int bootloader_main(void) {
     ui_set_initial_setup(true);
 
     ui_screen_welcome_model();
+#ifndef USE_BACKLIGHT
+    hal_delay(1500);
+#else
     hal_delay(1000);
+#endif
     ui_screen_welcome();
 
     // erase storage

core/embed/prodtest/main.c

@@ -519,6 +519,7 @@ static void test_otp_write_device_variant(const char *args) {
 #define BACKLIGHT_NORMAL 150
 
 int main(void) {
+  display_reinit();
   display_orientation(0);
   random_delays_init();
 #ifdef USE_SD_CARD
@@ -536,7 +537,6 @@ int main(void) {
 #endif
   usb_init_all();
 
-  display_reinit();
   display_clear();
   draw_border(1, 3);
 

core/embed/rust/src/ui/model_tr/bootloader/mod.rs

@@ -1,7 +1,7 @@
 use crate::{
     strutil::hexlify,
     time::Duration,
-    trezorhal::{io::io_button_read, time},
+    trezorhal::io::io_button_read,
     ui::{
         component::{Component, Event, EventCtx, Label, LineBreaking::BreakWordsNoHyphen, Never},
         constant::SCREEN,
@@ -320,7 +320,7 @@ extern "C" fn screen_wipe_fail() {
 }
 
 #[no_mangle]
-extern "C" fn screen_boot_empty(_firmware_present: bool) {
+extern "C" fn screen_boot_empty(_fading: bool) {
     display::rect_fill(SCREEN, BLD_BG);
     LOGO_EMPTY.draw(
         SCREEN.top_center() + Offset::y(11),
@@ -329,9 +329,6 @@ extern "C" fn screen_boot_empty(_firmware_present: bool) {
         BLD_BG,
     );
     display::refresh();
-    if !_firmware_present {
-        time::sleep(Duration::from_millis(1000));
-    }
 }
 
 #[no_mangle]

core/embed/trezorhal/stm32f4/displays/vg-2864ksweg01.c

@@ -228,9 +228,9 @@ void display_init(void) {
 
   // Reset the LCD
   HAL_GPIO_WritePin(OLED_RST_PORT, OLED_RST_PIN, GPIO_PIN_SET);
-  HAL_Delay(40);
+  HAL_Delay(1);
   HAL_GPIO_WritePin(OLED_RST_PORT, OLED_RST_PIN, GPIO_PIN_RESET);
-  HAL_Delay(400);
+  HAL_Delay(1);
   HAL_GPIO_WritePin(OLED_RST_PORT, OLED_RST_PIN, GPIO_PIN_SET);
 
   // init