chore(core/bootloader): add option to disable animations in bootloader

diff --git a/core/SConscript.bootloader b/core/SConscript.bootloader
index aeb6c193..9f6c2d62 100644
--- a/core/SConscript.bootloader
+++ b/core/SConscript.bootloader
@@ -11,6 +11,7 @@ PRODUCTION = 0 if BOOTLOADER_QA else ARGUMENTS.get('PRODUCTION', '0') == '1'
 HW_REVISION = ARGUMENTS.get('HW_REVISION', None)
 UI_PERFORMANCE_OVERLAY = ARGUMENTS.get('UI_PERFORMANCE_OVERLAY', '0') == '1'
 DBG_CONSOLE = ARGUMENTS.get('DBG_CONSOLE', '')
+DISABLE_ANIMATION = ARGUMENTS.get('TREZOR_DISABLE_ANIMATION', '0') == '1'
 
 FEATURES_WANTED = [
     "ble",
@@ -70,6 +71,7 @@ CPPDEFINES_MOD += [
     'USE_KECCAK',
     'ED25519_NO_PRECOMP',
     'FANCY_FATAL_ERROR',
+    ('DISABLE_ANIMATION', '1' if DISABLE_ANIMATION else '0'),
 ]
 
 SOURCE_MOD_CRYPTO = [
diff --git a/core/embed/projects/bootloader/emulator.c b/core/embed/projects/bootloader/emulator.c
index 0768ad5f..d8c6e9d3 100644
--- a/core/embed/projects/bootloader/emulator.c
+++ b/core/embed/projects/bootloader/emulator.c
@@ -17,6 +17,7 @@
 #endif
 
 #include "emulator.h"
+#include "rust_ui_common.h"
 
 #undef FIRMWARE_START
 
@@ -39,6 +40,7 @@ bool storage_empty(const flash_area_t *area) {
 void usage(void) {
   printf("Usage: ./build/bootloader/bootloader_emu [options]\n");
   printf("Options:\n");
+  printf("  -a  disable animations\n");
   printf("  -s  stay in bootloader\n");
   printf("  -w  wipe any firmware before booting\n");
   printf("  -e MESSAGE [TITLE [FOOTER]]  display error screen and stop\n");
@@ -149,8 +151,11 @@ int main(int argc, char **argv) {
   uint8_t set_variant = 0xff;
   uint8_t color_variant = 0;
   uint8_t bitcoin_only = 0;
-  while ((opt = getopt(argc, argv, "hslewc:b:f:i:")) != -1) {
+  while ((opt = getopt(argc, argv, "ahslewc:b:f:i:")) != -1) {
     switch (opt) {
+      case 'a':
+        disable_animation(true);
+        break;
       case 's':
         bootargs_set(BOOT_COMMAND_STOP_AND_WAIT, NULL, 0);
         break;
diff --git a/core/embed/projects/bootloader/main.c b/core/embed/projects/bootloader/main.c
index aa1751bb..49e074f2 100644
--- a/core/embed/projects/bootloader/main.c
+++ b/core/embed/projects/bootloader/main.c
@@ -89,6 +89,7 @@
 #endif
 
 #include "bootui.h"
+#include "rust_ui_common.h"
 #include "ui_helpers.h"
 #include "version_check.h"
 #include "wire/wire_iface_usb.h"
@@ -513,6 +514,10 @@ int bootloader_main(void) {
 
   drivers_init(manufacturing_mode, &touch_initialized);
 
+#ifdef DISABLE_ANIMATION
+  disable_animation(true);
+#endif
+
 #ifdef USE_BOOTARGS_RSOD
   if (bootargs_get_command() == BOOT_COMMAND_SHOW_RSOD) {
 #ifdef LAZY_DISPLAY_INIT
diff --git a/core/embed/rust/rust_ui_common.h b/core/embed/rust/rust_ui_common.h
index d1015337..cf4effa9 100644
--- a/core/embed/rust/rust_ui_common.h
+++ b/core/embed/rust/rust_ui_common.h
@@ -10,3 +10,5 @@ void screen_update(void);
 void display_image(int16_t x, int16_t y, const uint8_t* data, uint32_t datalen);
 void display_icon(int16_t x, int16_t y, const uint8_t* data, uint32_t datalen,
                   uint16_t fg_color, uint16_t bg_color);
+
+void disable_animation(bool disable);
diff --git a/core/embed/rust/src/ui/api/common_c.rs b/core/embed/rust/src/ui/api/common_c.rs
index 1fe45960..9b2e4227 100644
--- a/core/embed/rust/src/ui/api/common_c.rs
+++ b/core/embed/rust/src/ui/api/common_c.rs
@@ -5,6 +5,9 @@ use crate::ui::{CommonUI, ModelUI};
 
 use crate::{ui::shape, util::from_c_str};
 
+#[cfg(feature = "ui_debug")]
+use crate::ui::util::set_animation_disabled;
+
 #[no_mangle]
 extern "C" fn display_rsod_rust(
     title: *const cty::c_char,
@@ -35,3 +38,13 @@ extern "C" fn screen_boot_stage_2(fade_in: bool) {
 extern "C" fn screen_update() {
     ModelUI::screen_update();
 }
+
+#[no_mangle]
+#[cfg(feature = "ui_debug")]
+extern "C" fn disable_animation(disable: bool) {
+    set_animation_disabled(disable);
+}
+
+#[no_mangle]
+#[cfg(not(feature = "ui_debug"))]
+extern "C" fn disable_animation(_disable: bool) {}