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13 changes: 11 additions & 2 deletions src/displayapp/DisplayApp.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -292,7 +292,13 @@ void DisplayApp::Refresh() {
switch (msg) {
case Messages::GoToSleep:
case Messages::GoToAOD:
if (state != States::Running) {
// Checking if SystemTask is sleeping is purely an optimisation.
// If it's no longer sleeping since it sent GoToSleep, it has
// cancelled the sleep and transitioned directly from
// GoingToSleep->Running, so we are about to receive GoToRunning
// and can ignore this message. If it wasn't ignored, DisplayApp
// would go to sleep and then immediately re-wake
if (state != States::Running || !systemTask->IsSleeping()) {
break;
}
while (brightnessController.Level() != Controllers::BrightnessController::Levels::Low) {
Expand Down Expand Up @@ -334,7 +340,10 @@ void DisplayApp::Refresh() {
lv_disp_trig_activity(nullptr);
break;
case Messages::GoToRunning:
if (state == States::Running) {
// If SystemTask is sleeping, the GoToRunning message is old
// and must be ignored. Otherwise DisplayApp will use SPI
// that is powered down and cause bad behaviour
if (state == States::Running || systemTask->IsSleeping()) {
break;
}
if (state == States::AOD) {
Expand Down