Various graphics and touch driver improvements

Boards/LilygoTdeck/CMakeLists.txt

@@ -3,5 +3,5 @@ file(GLOB_RECURSE SOURCE_FILES Source/*.c*)
 idf_component_register(
     SRCS ${SOURCE_FILES}
     INCLUDE_DIRS "Source"
-    REQUIRES Tactility EspLcdNativeDisplay esp_lvgl_port esp_lcd ST7789 GT911 PwmBacklight driver esp_adc
+    REQUIRES Tactility EspLcdCompat ST7789 GT911 PwmBacklight driver esp_adc
 )

Boards/LilygoTdeck/Source/hal/TdeckDisplay.cpp

@@ -41,5 +41,6 @@ std::shared_ptr<tt::hal::display::DisplayDevice> createDisplay() {
 
     configuration->backlightDutyFunction = driver::pwmbacklight::setBacklightDuty;
 
-    return std::make_shared<St7789Display>(std::move(configuration));
+    auto display = std::make_shared<St7789Display>(std::move(configuration));
+    return std::reinterpret_pointer_cast<tt::hal::display::DisplayDevice>(display);
 }

Boards/LilygoTdeck/Source/hal/TdeckDisplay.h

@@ -1,40 +1,5 @@
 #pragma once
 
 #include "Tactility/hal/display/DisplayDevice.h"
-#include <esp_lcd_types.h>
-#include <lvgl.h>
-
-class TdeckDisplay : public tt::hal::display::DisplayDevice {
-
-private:
-
-    esp_lcd_panel_io_handle_t ioHandle = nullptr;
-    esp_lcd_panel_handle_t panelHandle = nullptr;
-    lv_display_t* displayHandle = nullptr;
-    bool poweredOn = false;
-
-public:
-
-    std::string getName() const final { return "ST7789"; }
-    std::string getDescription() const final { return "SPI display"; }
-
-    bool start() override;
-
-    bool stop() override;
-
-    void setPowerOn(bool turnOn) override;
-    bool isPoweredOn() const override { return poweredOn; };
-    bool supportsPowerControl() const override { return true; }
-
-    std::shared_ptr<tt::hal::touch::TouchDevice> _Nullable createTouch() override;
-
-    void setBacklightDuty(uint8_t backlightDuty) override;
-    bool supportsBacklightDuty() const override { return true; }
-
-    void setGammaCurve(uint8_t index) override;
-    uint8_t getGammaCurveCount() const override { return 4; };
-
-    lv_display_t* _Nullable getLvglDisplay() const override { return displayHandle; }
-};
 
 std::shared_ptr<tt::hal::display::DisplayDevice> createDisplay();

Boards/Simulator/Source/hal/SdlDisplay.h

@@ -4,6 +4,9 @@
 #include "Tactility/hal/display/DisplayDevice.h"
 #include <memory>
 
+#include 
+#include 
+
 /** Hack: variable comes from LvglTask.cpp */
 extern lv_disp_t* displayHandle;
 

Drivers/EspLcdCompat/CMakeLists.txt

@@ -1,5 +1,5 @@
 idf_component_register(
     SRC_DIRS "Source"
     INCLUDE_DIRS "Source"
-    REQUIRES Tactility esp_lcd
+    REQUIRES Tactility esp_lcd esp_lcd_touch esp_lvgl_port
 )

Drivers/EspLcdCompat/README.md

@@ -0,0 +1,3 @@
+# EspLcdCompat
+
+A set of helper classes to implement `esp_lcd` drivers in Tactility.

Drivers/EspLcdCompat/Source/EspLcdDisplay.cpp

@@ -0,0 +1,96 @@
+#include "EspLcdDisplay.h"
+#include "EspLcdNativeDisplay.h"
+
+#include <assert.h>
+#include <esp_lvgl_port_disp.h>
+#include <Tactility/Check.h>
+#include <Tactility/LogEsp.h>
+#include <Tactility/hal/touch/TouchDevice.h>
+
+constexpr char* TAG = "EspLcdDisplay";
+
+EspLcdDisplay::~EspLcdDisplay() {
+    if (nativeDisplay != nullptr && nativeDisplay.use_count() > 1) {
+        tt_crash("NativeDisplay is still in use. This will cause memory access violations.");
+    }
+}
+
+bool EspLcdDisplay::start() {
+    if (!createIoHandle(ioHandle)) {
+        TT_LOG_E(TAG, "Failed to create IO handle");
+        return false;
+    }
+
+    if (!createPanelHandle(ioHandle, panelHandle)) {
+        TT_LOG_E(TAG, "Failed to create panel handle");
+        esp_lcd_panel_io_del(ioHandle);
+        return false;
+    }
+
+    return true;
+}
+
+bool EspLcdDisplay::stop() {
+    if (lvglDisplay != nullptr) {
+        stopLvgl();
+        lvglDisplay = nullptr;
+    }
+
+    if (panelHandle != nullptr && esp_lcd_panel_del(panelHandle) != ESP_OK) {
+        return false;
+    }
+
+    if (ioHandle != nullptr && esp_lcd_panel_io_del(ioHandle) != ESP_OK) {
+        return false;
+    }
+
+    if (nativeDisplay != nullptr && nativeDisplay.use_count() > 1) {
+        TT_LOG_W(TAG, "NativeDisplay is still in use.");
+    }
+
+    return true;
+}
+
+bool EspLcdDisplay::startLvgl() {
+    assert(lvglDisplay == nullptr);
+
+    if (nativeDisplay != nullptr && nativeDisplay.use_count() > 1) {
+        TT_LOG_W(TAG, "NativeDisplay is still in use.");
+    }
+
+    lvglPortDisplayConfig = getLvglPortDisplayConfig(ioHandle, panelHandle);
+    lvglDisplay = lvgl_port_add_disp(&lvglPortDisplayConfig);
+
+    auto touch_device = getTouchDevice();
+    if (touch_device != nullptr) {
+        touch_device->start(lvglDisplay);
+    }
+
+    return lvglDisplay != nullptr;
+}
+
+bool EspLcdDisplay::stopLvgl() {
+    if (lvglDisplay == nullptr) {
+        return false;
+    }
+
+    auto touch_device = getTouchDevice();
+    if (touch_device != nullptr) {
+        touch_device->stop();
+    }
+
+    lvgl_port_remove_disp(lvglDisplay);
+    lvglDisplay = nullptr;
+    return true;
+}
+
+std::shared_ptr<tt::hal::display::NativeDisplay> EspLcdDisplay::getNativeDisplay() {
+    assert(lvglDisplay == nullptr); // Still attached to LVGL context. Call stopLvgl() first.
+    if (nativeDisplay == nullptr) {
+        nativeDisplay = std::make_shared<tt::hal::display::EspLcdNativeDisplay>(
+            panelHandle,
+            lvglPortDisplayConfig
+        );
+    }
+    return nativeDisplay;
+}

Drivers/EspLcdCompat/Source/EspLcdDisplay.h

@@ -0,0 +1,55 @@
+#pragma once
+
+#include <Tactility/hal/display/DisplayDevice.h>
+
+#include <esp_lcd_types.h>
+#include <esp_lvgl_port_disp.h>
+#include <Tactility/hal/display/NativeDisplay.h>
+
+class EspLcdDisplay : tt::hal::display::DisplayDevice {
+
+    esp_lcd_panel_io_handle_t ioHandle = nullptr;
+    esp_lcd_panel_handle_t panelHandle = nullptr;
+    lv_display_t* lvglDisplay = nullptr;
+    lvgl_port_display_cfg_t lvglPortDisplayConfig;
+    std::shared_ptr<tt::hal::display::NativeDisplay> nativeDisplay;
+
+protected:
+
+    // Used for sending commands such as setting curves
+    esp_lcd_panel_io_handle_t getIoHandle() const { return ioHandle; }
+
+    virtual bool createIoHandle(esp_lcd_panel_io_handle_t& outHandle) = 0;
+
+    virtual bool createPanelHandle(esp_lcd_panel_io_handle_t ioHandle, esp_lcd_panel_handle_t& panelHandle) = 0;
+
+    virtual lvgl_port_display_cfg_t getLvglPortDisplayConfig(esp_lcd_panel_io_handle_t ioHandle, esp_lcd_panel_handle_t panelHandle) = 0;
+
+public:
+
+    ~EspLcdDisplay() override;
+
+    bool start() final;
+
+    bool stop() final;
+
+    // region LVGL
+
+    bool supportsLvgl() const final { return true; }
+
+    bool startLvgl() final;
+
+    bool stopLvgl() final;
+
+    lv_display_t* _Nullable getLvglDisplay() const final { return lvglDisplay; }
+
+    // endregion
+
+    // region NativedDisplay
+
+    bool supportsNativeDisplay() const final { return true; }
+
+    std::shared_ptr<tt::hal::display::NativeDisplay> getNativeDisplay() final;
+
+    // endregion
+};

Drivers/EspLcdCompat/Source/EspLcdNativeDisplay.h

@@ -0,0 +1,43 @@
+#pragma once
+
+#include <Tactility/hal/display/NativeDisplay.h>
+#include <esp_lcd_panel_ops.h>
+#include <esp_lvgl_port_disp.h>
+
+namespace tt::hal::display {
+
+class EspLcdNativeDisplay final : public NativeDisplay {
+
+    esp_lcd_panel_handle_t panelHandle;
+    const lvgl_port_display_cfg_t& lvglPortDisplayConfig;
+
+public:
+    EspLcdNativeDisplay(
+        esp_lcd_panel_handle_t panelHandle,
+        const lvgl_port_display_cfg_t& lvglPortDisplayConfig
+    ) : panelHandle(panelHandle), lvglPortDisplayConfig(lvglPortDisplayConfig) {}
+
+    ColorFormat getColorFormat() const override {
+        switch (lvglPortDisplayConfig.color_format) {
+            case LV_COLOR_FORMAT_I1:
+                return ColorFormat::Monochrome;
+            case LV_COLOR_FORMAT_RGB565:
+                // swap_bytes is only used for the 565 color format
+                // see lvgl_port_flush_callback() in esp_lvgl_port_disp.c
+                return lvglPortDisplayConfig.flags.swap_bytes ? ColorFormat::BGR565 : ColorFormat::RGB565;
+            case LV_COLOR_FORMAT_RGB888:
+                return ColorFormat::RGB888;
+            default:
+                return ColorFormat::RGB565;
+        }
+    }
+
+    bool drawBitmap(int xStart, int yStart, int xEnd, int yEnd, const void* pixelData) override {
+        return esp_lcd_panel_draw_bitmap(panelHandle, xStart, yStart, xEnd, yEnd, pixelData) == ESP_OK;
+    }
+
+    uint16_t getPixelWidth() const override { return lvglPortDisplayConfig.hres; }
+    uint16_t getPixelHeight() const override { return lvglPortDisplayConfig.vres; }
+};
+
+}

Drivers/EspLcdCompat/Source/EspLcdTouch.cpp

@@ -0,0 +1,55 @@
+#include "EspLcdTouch.h"
+
+#include <esp_lvgl_port_touch.h>
+#include <Tactility/LogEsp.h>
+
+constexpr char* TAG = "EspLcdTouch";
+
+bool EspLcdTouch::start(lv_display_t* display) {
+    if (!createIoHandle(ioHandle) != ESP_OK) {
+        TT_LOG_E(TAG, "Touch IO failed");
+        return false;
+    }
+
+    config = createEspLcdTouchConfig();
+
+    if (!createTouchHandle(ioHandle, config, touchHandle)) {
+        TT_LOG_E(TAG, "Driver init failed");
+        cleanup();
+        return false;
+    }
+
+    const lvgl_port_touch_cfg_t touch_cfg = {
+        .disp = display,
+        .handle = touchHandle,
+    };
+
+    TT_LOG_I(TAG, "Adding touch to LVGL");
+    lvglDevice = lvgl_port_add_touch(&touch_cfg);
+    if (lvglDevice == nullptr) {
+        TT_LOG_E(TAG, "Adding touch failed");
+        cleanup();
+        return false;
+    }
+
+    return true;
+}
+
+bool EspLcdTouch::stop() {
+    cleanup();
+    return true;
+}
+
+void EspLcdTouch::cleanup() {
+    if (lvglDevice != nullptr) {
+        lv_indev_delete(lvglDevice);
+        lvglDevice = nullptr;
+        // TODO: is this correct? We don't have to delete it manually?
+        touchHandle = nullptr;
+    }
+
+    if (ioHandle != nullptr) {
+        esp_lcd_panel_io_del(ioHandle);
+        ioHandle = nullptr;
+    }
+}

Drivers/EspLcdCompat/Source/EspLcdTouch.h

@@ -0,0 +1,34 @@
+#pragma once
+
+#include <esp_lcd_touch.h>
+#include <esp_lcd_types.h>
+#include <lvgl.h>
+#include <Tactility/hal/touch/TouchDevice.h>
+
+class EspLcdTouch : public tt::hal::touch::TouchDevice {
+
+    esp_lcd_touch_config_t config;
+    esp_lcd_panel_io_handle_t _Nullable ioHandle = nullptr;
+    esp_lcd_touch_handle_t _Nullable touchHandle = nullptr;
+    lv_indev_t* _Nullable lvglDevice = nullptr;
+
+    void cleanup();
+
+protected:
+
+    virtual bool createIoHandle(esp_lcd_panel_io_handle_t& ioHandle) = 0;
+
+    virtual bool createTouchHandle(esp_lcd_panel_io_handle_t ioHandle, const esp_lcd_touch_config_t& configuration, esp_lcd_touch_handle_t& touchHandle) = 0;
+
+    virtual esp_lcd_touch_config_t createEspLcdTouchConfig() = 0;
+
+public:
+
+
+    bool start(lv_display_t* display) override;
+
+    bool stop() override;
+
+
+    lv_indev_t* _Nullable getLvglIndev() override { return lvglDevice; }
+};

Drivers/EspLcdNativeDisplay/README.md

@@ -1,3 +0,0 @@
-# EspLcdNativeDisplay
-
-An implementation of `tt::hal::display::NativeDisplay` for display drivers that are built around the `esp_lcd` library.

Drivers/EspLcdNativeDisplay/Source/EspLcdNativeDisplay.h

@@ -1,33 +0,0 @@
-#pragma once
-
-#include <Tactility/hal/display/NativeDisplay.h>
-#include <esp_lcd_panel_ops.h>
-
-namespace tt::hal::display {
-
-class EspLcdNativeDisplay final : public NativeDisplay {
-
-    esp_lcd_panel_handle_t panelHandle;
-    ColorFormat colorFormat;
-    uint16_t pixelWidth;
-    uint16_t pixelHeight;
-
-public:
-    EspLcdNativeDisplay(
-        esp_lcd_panel_handle_t panelHandle,
-        ColorFormat colorFormat,
-        uint16_t pixelWidth,
-        uint16_t pixelHeight
-    ) : panelHandle(panelHandle), colorFormat(colorFormat), pixelWidth(pixelWidth), pixelHeight(pixelHeight) {}
-
-    ColorFormat getColorFormat() const override { return colorFormat; }
-
-    bool drawBitmap(int xStart, int yStart, int xEnd, int yEnd, const void* pixelData) override {
-        return esp_lcd_panel_draw_bitmap(panelHandle, xStart, yStart, xEnd, yEnd, pixelData) == ESP_OK;
-    }
-
-    uint16_t getPixelWidth() const override { return pixelWidth; }
-    uint16_t getPixelHeight() const override { return pixelHeight; }
-};
-
-}

Drivers/GT911/Source/Gt911Touch.cpp

@@ -9,7 +9,7 @@
 
 #define TAG "GT911"
 
-bool Gt911Touch::start(lv_display_t* display) {
+bool Gt911Touch::createIoHandle(esp_lcd_panel_io_handle_t& outHandle) {
     esp_lcd_panel_io_i2c_config_t io_config = ESP_LCD_TOUCH_IO_I2C_GT911_CONFIG();
 
     /**
@@ -26,12 +26,15 @@ bool Gt911Touch::start(lv_display_t* display) {
         return false;
     }
 
-    if (esp_lcd_new_panel_io_i2c(configuration->port, &io_config, &ioHandle) != ESP_OK) {
-        TT_LOG_E(TAG, "Touch IO I2C creation failed");
-        return false;
-    }
+    return esp_lcd_new_panel_io_i2c(configuration->port, &io_config, &outHandle) == ESP_OK;
+}
 
-    esp_lcd_touch_config_t config = {
+bool Gt911Touch::createTouchHandle(esp_lcd_panel_io_handle_t ioHandle, const esp_lcd_touch_config_t& configuration, esp_lcd_touch_handle_t& panelHandle) {
+    return esp_lcd_touch_new_i2c_gt911(ioHandle, &configuration, &panelHandle) == ESP_OK;
+}
+
+esp_lcd_touch_config_t Gt911Touch::createEspLcdTouchConfig() {
+    return {
         .x_max = configuration->xMax,
         .y_max = configuration->yMax,
         .rst_gpio_num = configuration->pinReset,
@@ -50,43 +53,4 @@ bool Gt911Touch::start(lv_display_t* display) {
         .user_data = nullptr,
         .driver_data = nullptr
     };
-
-    if (esp_lcd_touch_new_i2c_gt911(ioHandle, &config, &touchHandle) != ESP_OK) {
-        TT_LOG_E(TAG, "Driver init failed");
-        cleanup();
-        return false;
-    }
-
-    const lvgl_port_touch_cfg_t touch_cfg = {
-        .disp = display,
-        .handle = touchHandle,
-    };
-
-    TT_LOG_I(TAG, "Adding touch to LVGL");
-    deviceHandle = lvgl_port_add_touch(&touch_cfg);
-    if (deviceHandle == nullptr) {
-        TT_LOG_E(TAG, "Adding touch failed");
-        cleanup();
-        return false;
-    }
-
-    return true;
-}
-
-bool Gt911Touch::stop() {
-    cleanup();
-    return true;
-}
-
-void Gt911Touch::cleanup() {
-    if (deviceHandle != nullptr) {
-        lv_indev_delete(deviceHandle);
-        deviceHandle = nullptr;
-        touchHandle = nullptr;
-    }
-
-    if (ioHandle != nullptr) {
-        esp_lcd_panel_io_del(ioHandle);
-        ioHandle = nullptr;
-    }
 }

Drivers/GT911/Source/Gt911Touch.h

@@ -4,10 +4,11 @@
 #include <Tactility/TactilityCore.h>
 #include <driver/i2c.h>
 
-#include <esp_lcd_panel_io_interface.h>
 #include <esp_lcd_touch.h>
 
-class Gt911Touch final : public tt::hal::touch::TouchDevice {
+#include "../../EspLcdCompat/Source/EspLcdTouch.h"
+
+class Gt911Touch final : public EspLcdTouch {
 
 public:
 
@@ -52,11 +53,12 @@ public:
 private:
 
     std::unique_ptr<Configuration> configuration;
-    esp_lcd_panel_io_handle_t _Nullable ioHandle = nullptr;
-    esp_lcd_touch_handle_t _Nullable touchHandle = nullptr;
-    lv_indev_t* _Nullable deviceHandle = nullptr;
 
-    void cleanup();
+    bool createIoHandle(esp_lcd_panel_io_handle_t& outHandle) override;
+
+    bool createTouchHandle(esp_lcd_panel_io_handle_t ioHandle, const esp_lcd_touch_config_t& configuration, esp_lcd_touch_handle_t& panelHandle) override;
+
+    esp_lcd_touch_config_t createEspLcdTouchConfig();
 
 public:
 
@@ -64,10 +66,6 @@ public:
         assert(configuration != nullptr);
     }
 
-    bool start(lv_display_t* display) override;
-    bool stop() override;
-    lv_indev_t* _Nullable getLvglIndev() override { return deviceHandle; }
-
-    std::string getName() const final { return "GT911"; }
-    std::string getDescription() const final { return "I2C Touch Driver"; }
+    std::string getName() const override { return "GT911"; }
+    std::string getDescription() const override { return "I2C Touch Driver"; }
 };

Drivers/ST7789/CMakeLists.txt

@@ -1,5 +1,5 @@
 idf_component_register(
     SRC_DIRS "Source"
     INCLUDE_DIRS "Source"
-    REQUIRES Tactility esp_lvgl_port esp_lcd driver EspLcdNativeDisplay
+    REQUIRES Tactility driver EspLcdCompat
 )

Drivers/ST7789/Source/St7789Display.cpp

@@ -9,7 +9,7 @@
 
 #define TAG "ST7789"
 
-bool St7789Display::start() {
+bool St7789Display::createIoHandle(esp_lcd_panel_io_handle_t& outHandle) {
     TT_LOG_I(TAG, "Starting");
 
     const esp_lcd_panel_io_spi_config_t panel_io_config = {
@@ -36,11 +36,16 @@ bool St7789Display::start() {
         }
     };
 
-    if (esp_lcd_new_panel_io_spi(configuration->spiBusHandle, &panel_io_config, &ioHandle) != ESP_OK) {
+    if (esp_lcd_new_panel_io_spi(configuration->spiBusHandle, &panel_io_config, &outHandle) != ESP_OK) {
         TT_LOG_E(TAG, "Failed to create panel");
         return false;
     }
 
+    return true;
+}
+
+bool St7789Display::createPanelHandle(esp_lcd_panel_io_handle_t ioHandle, esp_lcd_panel_handle_t& panelHandle) {
+
     const esp_lcd_panel_dev_config_t panel_config = {
         .reset_gpio_num = configuration->resetPin,
         .rgb_ele_order = LCD_RGB_ELEMENT_ORDER_RGB,
@@ -88,29 +93,10 @@ bool St7789Display::start() {
     }
 
     TT_LOG_I(TAG, "Finished");
-    return panelHandle != nullptr;
-}
-
-bool St7789Display::stop() {
-    if (getLvglDisplay() != nullptr) {
-        stopLvgl();
-    }
-
-    if (esp_lcd_panel_del(panelHandle) != ESP_OK) {
-        return false;
-    }
-
-    if (esp_lcd_panel_io_del(ioHandle) != ESP_OK) {
-        return false;
-    }
-
-    displayHandle = nullptr;
     return true;
 }
 
-bool St7789Display::startLvgl() {
-    assert(displayHandle == nullptr);
-
+lvgl_port_display_cfg_t St7789Display::getLvglPortDisplayConfig(esp_lcd_panel_io_handle_t ioHandle, esp_lcd_panel_handle_t panelHandle) {
     uint32_t buffer_size;
     if (configuration->bufferSize == 0) {
         buffer_size = configuration->horizontalResolution * configuration->verticalResolution / 10;
@@ -118,7 +104,7 @@ bool St7789Display::startLvgl() {
         buffer_size = configuration->bufferSize;
     }
 
-    const lvgl_port_display_cfg_t disp_cfg = {
+    return lvgl_port_display_cfg_t {
         .io_handle = ioHandle,
         .panel_handle = panelHandle,
         .control_handle = nullptr,
@@ -143,21 +129,7 @@ bool St7789Display::startLvgl() {
             .direct_mode = false
         }
     };
-
-    displayHandle = lvgl_port_add_disp(&disp_cfg);
-    return displayHandle != nullptr;
 }
-
-bool St7789Display::stopLvgl() {
-    if (displayHandle == nullptr) {
-        return false;
-    } else {
-        lvgl_port_remove_disp(displayHandle);
-        displayHandle = nullptr;
-        return true;
-    }
-}
-
 /**
  * Note:
  * The datasheet implies this should work, but it doesn't:
@@ -190,7 +162,9 @@ void St7789Display::setGammaCurve(uint8_t index) {
         gamma_curve
     };
 
-    if (esp_lcd_panel_io_tx_param(ioHandle , LCD_CMD_GAMSET, param, 1) != ESP_OK) {
+    auto io_handle = getIoHandle();
+    assert(io_handle != nullptr);
+    if (esp_lcd_panel_io_tx_param(io_handle, LCD_CMD_GAMSET, param, 1) != ESP_OK) {
         TT_LOG_E(TAG, "Failed to set gamma");
     }
 }

Drivers/ST7789/Source/St7789Display.h

@@ -1,16 +1,15 @@
 #pragma once
 
+#include <EspLcdDisplay.h>
 #include <Tactility/hal/display/DisplayDevice.h>
 
-#include <EspLcdNativeDisplay.h>
-
 #include <driver/gpio.h>
 #include <esp_lcd_panel_io.h>
 #include <esp_lcd_types.h>
 #include <functional>
 #include <lvgl.h>
 
-class St7789Display final : public tt::hal::display::DisplayDevice {
+class St7789Display final : public EspLcdDisplay {
 
 public:
 
@@ -63,9 +62,6 @@ public:
 private:
 
     std::unique_ptr<Configuration> configuration;
-    esp_lcd_panel_io_handle_t ioHandle = nullptr;
-    esp_lcd_panel_handle_t panelHandle = nullptr;
-    lv_display_t* displayHandle = nullptr;
 
 public:
 
@@ -76,11 +72,13 @@ public:
     std::string getName() const override { return "ST7789"; }
     std::string getDescription() const override { return "ST7789 display"; }
 
-    bool start() override;
+    bool createIoHandle(esp_lcd_panel_io_handle_t& ioHandle) override;
 
-    bool stop() override;
+    bool createPanelHandle(esp_lcd_panel_io_handle_t ioHandle, esp_lcd_panel_handle_t& panelHandle) override;
 
-    std::shared_ptr<tt::hal::touch::TouchDevice> _Nullable createTouch() override { return configuration->touch; }
+    lvgl_port_display_cfg_t getLvglPortDisplayConfig(esp_lcd_panel_io_handle_t ioHandle, esp_lcd_panel_handle_t panelHandle) override;
+
+    std::shared_ptr<tt::hal::touch::TouchDevice> _Nullable getTouchDevice() override { return configuration->touch; }
 
     void setBacklightDuty(uint8_t backlightDuty) override {
         if (configuration->backlightDutyFunction != nullptr) {
@@ -92,35 +90,6 @@ public:
 
     void setGammaCurve(uint8_t index) override;
     uint8_t getGammaCurveCount() const override { return 4; };
-
-    // region LVGL
-
-    bool supportsLvgl() const override { return true; }
-
-    bool startLvgl() override;
-
-    bool stopLvgl() override;
-
-    lv_display_t* _Nullable getLvglDisplay() const override { return displayHandle; }
-
-    // endregion
-
-    // region NativedDisplay
-
-    bool supportsNativeDisplay() const override { return true; }
-
-    std::shared_ptr<tt::hal::display::NativeDisplay> getNativeDisplay() override {
-        assert(displayHandle == nullptr); // Still attached to LVGL context. Call stopLvgl() first.
-
-        return std::make_shared<tt::hal::display::EspLcdNativeDisplay>(
-            panelHandle,
-            tt::hal::display::ColorFormat::RGB565,
-            configuration->horizontalResolution,
-            configuration->verticalResolution
-        );
-    }
-
-    // endregion
 };
 
 std::shared_ptr<tt::hal::display::DisplayDevice> createDisplay();

Tactility/Include/Tactility/hal/display/DisplayDevice.h

@@ -26,7 +26,7 @@ public:
     virtual bool isPoweredOn() const { return true; }
     virtual bool supportsPowerControl() const { return false; }
 
-    virtual std::shared_ptr<touch::TouchDevice> _Nullable createTouch() = 0;
+    virtual std::shared_ptr<touch::TouchDevice> _Nullable getTouchDevice() = 0;
 
     /** Set a value in the range [0, 255] */
     virtual void setBacklightDuty(uint8_t backlightDuty) { /* NO-OP */ }

Tactility/Include/Tactility/lvgl/Lvgl.h

@@ -3,3 +3,7 @@
 #include <lvgl.h>
 
 #include "./Colors.h"
+
+void startLvgl();
+
+void stopLvgl();

Tactility/Source/lvgl/Init.cpp

@@ -43,18 +43,6 @@ static std::shared_ptr<hal::display::DisplayDevice> initDisplay(const hal::Confi
     return display;
 }
 
-static bool initTouch(const std::shared_ptr<hal::display::DisplayDevice>& display, const std::shared_ptr<hal::touch::TouchDevice>& touch) {
-    TT_LOG_I(TAG, "Touch init");
-    assert(display);
-    assert(touch);
-    if (touch->start(display->getLvglDisplay())) {
-        return true;
-    } else {
-        TT_LOG_E(TAG, "Touch init failed");
-        return false;
-    }
-}
-
 static bool initKeyboard(const std::shared_ptr<hal::display::DisplayDevice>& display, const std::shared_ptr<hal::keyboard::KeyboardDevice>& keyboard) {
     TT_LOG_I(TAG, "Keyboard init");
     assert(display);
@@ -93,10 +81,9 @@ void init(const hal::Configuration& config) {
     }
     hal::registerDevice(display);
 
-    auto touch = display->createTouch();
+    auto touch = display->getTouchDevice();
     if (touch != nullptr) {
         hal::registerDevice(touch);
-        initTouch(display, touch);
     }
 
     if (config.createKeyboard) {