Ken Van Hoeylandt
91 lines
3.3 KiB
C++
91 lines
3.3 KiB
C++
#include <Tactility/CoreDefines.h>
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#include <Tactility/Timer.h>
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#include <Tactility/hal/display/DisplayDevice.h>
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#include <Tactility/lvgl/LvglSync.h>
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#include <Tactility/service/ServiceContext.h>
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#include <Tactility/service/ServiceManifest.h>
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#include <Tactility/service/ServiceRegistration.h>
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#include <Tactility/settings/DisplaySettings.h>
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namespace tt::service::displayidle {
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constexpr auto* TAG = "DisplayIdle";
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class DisplayIdleService final : public Service {
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std::unique_ptr<Timer> timer;
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bool displayDimmed = false;
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settings::display::DisplaySettings cachedDisplaySettings;
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static std::shared_ptr<hal::display::DisplayDevice> getDisplay() {
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return hal::findFirstDevice<hal::display::DisplayDevice>(hal::Device::Type::Display);
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}
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void tick() {
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// Settings are now cached and event-driven (no file I/O in timer callback!)
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// This prevents watchdog timeout from blocking the Timer Service task
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// Query LVGL inactivity once for both checks
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uint32_t inactive_ms = 0;
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if (lvgl::lock(100)) {
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inactive_ms = lv_disp_get_inactive_time(nullptr);
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lvgl::unlock();
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}
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// Handle display backlight
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auto display = getDisplay();
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if (display != nullptr && display->supportsBacklightDuty()) {
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// If timeout disabled, ensure backlight restored if we had dimmed it
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if (!cachedDisplaySettings.backlightTimeoutEnabled || cachedDisplaySettings.backlightTimeoutMs == 0) {
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if (displayDimmed) {
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display->setBacklightDuty(cachedDisplaySettings.backlightDuty);
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displayDimmed = false;
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}
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} else {
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if (!displayDimmed && inactive_ms >= cachedDisplaySettings.backlightTimeoutMs) {
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display->setBacklightDuty(0);
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displayDimmed = true;
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} else if (displayDimmed && inactive_ms < 100) {
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display->setBacklightDuty(cachedDisplaySettings.backlightDuty);
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displayDimmed = false;
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}
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}
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}
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}
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public:
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bool onStart(TT_UNUSED ServiceContext& service) override {
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// Load settings once at startup and cache them
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// This eliminates file I/O from timer callback (prevents watchdog timeout)
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cachedDisplaySettings = settings::display::loadOrGetDefault();
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// Note: Settings changes require service restart to take effect
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// TODO: Add DisplaySettingsChanged events for dynamic updates
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timer = std::make_unique<Timer>(Timer::Type::Periodic, kernel::millisToTicks(250), [this]{ this->tick(); });
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timer->setCallbackPriority(Thread::Priority::Lower);
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timer->start();
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return true;
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}
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void onStop(TT_UNUSED ServiceContext& service) override {
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if (timer) {
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timer->stop();
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timer = nullptr;
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}
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// Ensure display restored on stop
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auto display = getDisplay();
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if (display && displayDimmed) {
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display->setBacklightDuty(cachedDisplaySettings.backlightDuty);
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displayDimmed = false;
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}
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}
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};
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extern const ServiceManifest manifest = {
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.id = "DisplayIdle",
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.createService = create<DisplayIdleService>
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};
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}
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