refactor(core): make backlight/fading optional

[no changelog]

core/SConscript.firmware

@@ -695,7 +695,12 @@ if FROZEN:
         SOURCE_PY.extend(Glob(SOURCE_PY_DIR + 'apps/bitcoin/sign_tx/zcash_v4.py'))
         SOURCE_PY.extend(Glob(SOURCE_PY_DIR + 'trezor/enums/Zcash*.py'))
 
-    source_mpy = env.FrozenModule(source=SOURCE_PY, source_dir=SOURCE_PY_DIR, bitcoin_only=BITCOIN_ONLY)
+    source_mpy = env.FrozenModule(
+        source=SOURCE_PY,
+        source_dir=SOURCE_PY_DIR,
+        bitcoin_only=BITCOIN_ONLY,
+        backlight='backlight' in FEATURES_AVAILABLE
+        )
 
     source_mpyc = env.FrozenCFile(
         target='frozen_mpy.c', source=source_mpy, qstr_header=qstr_preprocessed)

core/SConscript.unix

@@ -690,7 +690,12 @@ if FROZEN:
         SOURCE_PY.extend(Glob(SOURCE_PY_DIR + 'apps/bitcoin/sign_tx/zcash_v4.py'))
         SOURCE_PY.extend(Glob(SOURCE_PY_DIR + 'trezor/enums/Zcash*.py'))
 
-    source_mpy = env.FrozenModule(source=SOURCE_PY, source_dir=SOURCE_PY_DIR, bitcoin_only=BITCOIN_ONLY)
+    source_mpy = env.FrozenModule(
+        source=SOURCE_PY,
+        source_dir=SOURCE_PY_DIR,
+        bitcoin_only=BITCOIN_ONLY,
+        backlight='backlight' in TREZOR_MODEL in ('T',)
+        )
 
     source_mpyc = env.FrozenCFile(
         target='frozen_mpy.c', source=source_mpy, qstr_header=qstr_preprocessed)

core/embed/extmod/modtrezorutils/modtrezorutils.c

@@ -259,6 +259,7 @@ STATIC mp_obj_str_t mod_trezorutils_revision_obj = {
 /// VERSION_MINOR: int
 /// VERSION_PATCH: int
 /// USE_SD_CARD: bool
+/// USE_BACKLIGHT: bool
 /// MODEL: str
 /// INTERNAL_MODEL: str
 /// EMULATOR: bool
@@ -289,6 +290,11 @@ STATIC const mp_rom_map_elem_t mp_module_trezorutils_globals_table[] = {
     {MP_ROM_QSTR(MP_QSTR_USE_SD_CARD), mp_const_true},
 #else
     {MP_ROM_QSTR(MP_QSTR_USE_SD_CARD), mp_const_false},
+#endif
+#ifdef USE_SD_CARD
+    {MP_ROM_QSTR(MP_QSTR_USE_BACKLIGHT), mp_const_true},
+#else
+    {MP_ROM_QSTR(MP_QSTR_USE_BACKLIGHT), mp_const_false},
 #endif
     {MP_ROM_QSTR(MP_QSTR_MODEL), MP_ROM_QSTR(MODEL_NAME_QSTR)},
     {MP_ROM_QSTR(MP_QSTR_INTERNAL_MODEL),

core/embed/lib/display.c

@@ -567,11 +567,13 @@ void display_offset(int set_xy[2], int *get_x, int *get_y) {
 }
 
 void display_fade(int start, int end, int delay) {
+#ifdef USE_BACKLIGHT
   for (int i = 0; i < 100; i++) {
     display_backlight(start + i * (end - start) / 100);
     hal_delay(delay / 100);
   }
   display_backlight(end);
+#endif
 }
 
 #define UTF8_IS_CONT(ch) (((ch)&0xC0) == 0x80)

core/embed/rust/Cargo.toml

@@ -27,6 +27,7 @@ debug = ["ui_debug"]
 sbu = []
 sd_card = []
 rgb_led = []
+backlight = []
 test = [
     "button",
     "cc",
@@ -37,6 +38,7 @@ test = [
     "ui",
     "dma2d",
     "touch",
+    "backlight"
 ]
 
 [lib]

core/embed/rust/src/ui/display/mod.rs

@@ -39,15 +39,18 @@ pub fn backlight() -> u16 {
     display::backlight(-1) as u16
 }
 
+#[cfg(feature = "backlight")]
 pub fn set_backlight(val: u16) {
     display::backlight(val as i32);
 }
 
+#[cfg(feature = "backlight")]
 pub fn fade_backlight(target: u16) {
     const FADE_DURATION_MS: u32 = 50;
     fade_backlight_duration(target, FADE_DURATION_MS);
 }
 
+#[cfg(feature = "backlight")]
 pub fn fade_backlight_duration(target: u16, duration_ms: u32) {
     let target = target as i32;
     let duration_ms = duration_ms as i32;
@@ -62,6 +65,15 @@ pub fn fade_backlight_duration(target: u16, duration_ms: u32) {
     set_backlight(target as u16);
 }
 
+#[cfg(not(feature = "backlight"))]
+pub fn set_backlight(_: u16) {}
+
+#[cfg(not(feature = "backlight"))]
+pub fn fade_backlight(_: u16) {}
+
+#[cfg(not(feature = "backlight"))]
+pub fn fade_backlight_duration(_: u16, _: u32) {}
+
 /// Fill a whole rectangle with a specific color.
 pub fn rect_fill(r: Rect, fg_color: Color) {
     display::bar(r.x0, r.y0, r.width(), r.height(), fg_color.into());

core/embed/trezorhal/boards/trezor_t.h

@@ -9,6 +9,7 @@
 #define USE_TOUCH 1
 #define USE_SBU 1
 #define USE_RGB_COLORS 1
+#define USE_BACKLIGHT 1
 #define USE_DISP_I8080_8BIT_DW 1
 
 #define I2C_COUNT 1

core/embed/unix/board-unix.h

@@ -6,6 +6,7 @@
 #define USE_SD_CARD 1
 #define USE_SBU 1
 #define USE_RGB_COLORS 1
+#define USE_BACKLIGHT 1
 #endif
 
 #ifdef TREZOR_MODEL_1

core/mocks/generated/trezorutils.pyi

@@ -84,6 +84,7 @@ VERSION_MAJOR: int
 VERSION_MINOR: int
 VERSION_PATCH: int
 USE_SD_CARD: bool
+USE_BACKLIGHT: bool
 MODEL: str
 INTERNAL_MODEL: str
 EMULATOR: bool

core/site_scons/boards/trezor_t.py

@@ -26,6 +26,8 @@ def configure(
     sources += [f'embed/trezorhal/displays/panels/lx154a2411.c', ]
     sources += [f'embed/trezorhal/displays/panels/lx154a2422.c', ]
 
+    features_available.append("backlight")
+
     if "input" in features_wanted:
         sources += ["embed/trezorhal/i2c.c"]
         sources += ["embed/trezorhal/touch/touch.c"]

core/site_scons/site_tools/micropython/__init__.py

@@ -31,9 +31,11 @@ def generate(env):
         # replace "utils.BITCOIN_ONLY" with literal constant (True/False)
         # so the compiler can optimize out the things we don't want
         btc_only = env['bitcoin_only'] == '1'
+        backlight = env['backlight']
         interim = f"{target[:-4]}.i"  # replace .mpy with .i
         sed_scripts = " ".join([
             rf"-e 's/utils\.BITCOIN_ONLY/{btc_only}/g'",
+            rf"-e 's/utils\.USE_BACKLIGHT/{backlight}/g'",
             r"-e 's/if TYPE_CHECKING/if False/'",
             r"-e 's/import typing/# \0/'",
             r"-e '/from typing import (/,/^\s*)/ {s/^/# /}'",

core/src/trezor/ui/__init__.py

@@ -66,29 +66,31 @@ async def _alert(count: int) -> None:
 
 
 def alert(count: int = 3) -> None:
-    global _alert_in_progress
+    if utils.USE_BACKLIGHT:
-    if _alert_in_progress:
+        global _alert_in_progress
-        return
+        if _alert_in_progress:
+            return
 
-    _alert_in_progress = True
+        _alert_in_progress = True
-    loop.schedule(_alert(count))
+        loop.schedule(_alert(count))
 
 
 def backlight_fade(val: int, delay: int = 14000, step: int = 15) -> None:
-    if __debug__:
+    if utils.USE_BACKLIGHT:
-        if utils.DISABLE_ANIMATION:
+        if __debug__:
+            if utils.DISABLE_ANIMATION:
+                display.backlight(val)
+                return
+        current = display.backlight()
+        if current < 0:
             display.backlight(val)
             return
-    current = display.backlight()
+        elif current > val:
-    if current < 0:
+            step = -step
+        for i in range(current, val, step):
+            display.backlight(i)
+            utime.sleep_us(delay)
         display.backlight(val)
-        return
-    elif current > val:
-        step = -step
-    for i in range(current, val, step):
-        display.backlight(i)
-        utime.sleep_us(delay)
-    display.backlight(val)
 
 
 # Component events.  Should be different from `io.TOUCH_*` events.

core/src/trezor/utils.py

@@ -6,6 +6,7 @@ from trezorutils import (  # noqa: F401
     INTERNAL_MODEL,
     MODEL,
     SCM_REVISION,
+    USE_BACKLIGHT,
     USE_SD_CARD,
     VERSION_MAJOR,
     VERSION_MINOR,