Fix for T-Deck apps not showing up and added new kernel functionality

Tactility/Source/Tactility.cpp

@@ -32,6 +32,7 @@
 #include <tactility/lvgl_module.h>
 
 #ifdef ESP_PLATFORM
+#include "tactility/drivers/root.h"
 #include <Tactility/InitEsp.h>
 #endif
 
@@ -61,8 +62,6 @@ namespace service {
     namespace statusbar { extern const ServiceManifest manifest; }
 #ifdef ESP_PLATFORM
     namespace displayidle { extern const ServiceManifest manifest; }
-#endif
-#if defined(ESP_PLATFORM) && defined(CONFIG_TT_DEVICE_LILYGO_TDECK)
     namespace keyboardidle { extern const ServiceManifest manifest; }
 #endif
 #if TT_FEATURE_SCREENSHOT_ENABLED
@@ -112,11 +111,8 @@ namespace app {
 #ifdef ESP_PLATFORM
     namespace crashdiagnostics { extern const AppManifest manifest; }
     namespace webserversettings { extern const AppManifest manifest; }
-#endif
+    namespace keyboardsettings { extern const AppManifest manifest; } // T-Deck only for now
-
+    namespace trackballsettings { extern const AppManifest manifest; } // T-Deck only for now
-#if defined(ESP_PLATFORM) && defined(CONFIG_TT_DEVICE_LILYGO_TDECK)
-    namespace keyboardsettings { extern const AppManifest manifest; }
-    namespace trackballsettings { extern const AppManifest manifest; }
 #endif
 
 #if TT_FEATURE_SCREENSHOT_ENABLED
@@ -162,11 +158,13 @@ static void registerInternalApps() {
     addAppManifest(app::webserversettings::manifest);
     addAppManifest(app::crashdiagnostics::manifest);
     addAppManifest(app::development::manifest);
-#endif
+    // T-Deck only:
-
+    auto* root_device = device_find_by_name("/");
-#if defined(ESP_PLATFORM) && defined(CONFIG_TT_DEVICE_LILYGO_TDECK)
+    check(root_device);
-    addAppManifest(app::keyboardsettings::manifest);
+    if (root_is_model(root_device, "LilyGO T-Deck")) {
-    addAppManifest(app::trackballsettings::manifest);
+        addAppManifest(app::keyboardsettings::manifest);
+        addAppManifest(app::trackballsettings::manifest);
+    }
 #endif
 
 #if defined(CONFIG_TINYUSB_MSC_ENABLED) && CONFIG_TINYUSB_MSC_ENABLED
@@ -251,13 +249,16 @@ static void registerAndStartSecondaryServices() {
     addService(service::loader::manifest);
     addService(service::gui::manifest);
     addService(service::statusbar::manifest);
+    addService(service::memorychecker::manifest);
 #ifdef ESP_PLATFORM
     addService(service::displayidle::manifest);
+    // T-Deck only:
+    auto* root_device = device_find_by_name("/");
+    check(root_device);
+    if (root_is_model(root_device, "LilyGO T-Deck")) {
+        addService(service::keyboardidle::manifest);
+    }
 #endif
-#if defined(ESP_PLATFORM) && defined(CONFIG_TT_DEVICE_LILYGO_TDECK)
-    addService(service::keyboardidle::manifest);
-#endif
-    addService(service::memorychecker::manifest);
 #if TT_FEATURE_SCREENSHOT_ENABLED
     addService(service::screenshot::manifest);
 #endif

TactilityKernel/Include/tactility/device.h

@@ -178,6 +178,14 @@ struct Device* device_get_parent(struct Device* device);
  */
 bool device_is_ready(const struct Device* device);
 
+/**
+ * Indicates whether the device is compatible with the given compatible string.
+ * @param[in] device non-null device pointer
+ * @param[in] compatible compatible string
+ * @return true if the device is compatible
+ */
+bool device_is_compatible(const struct Device* device, const char* compatible);
+
 /**
  * Set the driver data for a device.
  *

TactilityKernel/Include/tactility/drivers/root.h

@@ -2,6 +2,8 @@
 
 #pragma once
 
+#include <stddef.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -10,6 +12,14 @@ struct RootConfig {
     const char* model;
 };
 
+/**
+ * Indicates whether the device's model matches the specified model.
+ * @param[in] device the device to check (non-null)
+ * @param[in] model the model to check against
+ * @return true if the device's model matches the specified model'
+ */
+bool root_is_model(const struct Device* device, const char* model);
+
 #ifdef __cplusplus
 }
 #endif

TactilityKernel/Include/tactility/error.h

@@ -23,6 +23,7 @@ typedef int error_t;
 #define ERROR_OUT_OF_MEMORY 9
 #define ERROR_NOT_SUPPORTED 10
 #define ERROR_NOT_ALLOWED 11
+#define ERROR_BUFFER_OVERFLOW 12
 
 /** Convert an error_t to a human-readable text. Useful for logging. */
 const char* error_to_string(error_t error);

TactilityKernel/Source/device.cpp

@@ -277,6 +277,11 @@ bool device_is_ready(const struct Device* device) {
     return device->internal->state.started;
 }
 
+bool device_is_compatible(const struct Device* device, const char* compatible) {
+    if (device->internal->driver == nullptr) return false;
+    return driver_is_compatible(device->internal->driver, compatible);
+}
+
 void device_set_driver_data(struct Device* device, void* driver_data) {
     device->internal->driver_data = driver_data;
 }

TactilityKernel/Source/drivers/root.cpp

@@ -1,10 +1,16 @@
 // SPDX-License-Identifier: Apache-2.0
 
+#include <tactility/device.h>
 #include <tactility/driver.h>
 #include <tactility/drivers/root.h>
 
 extern "C" {
 
+bool root_is_model(const struct Device* device, const char* buffer) {
+    auto* config = static_cast<const RootConfig*>(device->config);
+    return strcmp(config->model, buffer) == 0;
+}
+
 Driver root_driver = {
     .name = "root",
     .compatible = (const char*[]) { "root", nullptr },

TactilityKernel/Source/kernel_symbols.c

@@ -3,6 +3,7 @@
 #include <tactility/drivers/gpio_controller.h>
 #include <tactility/drivers/i2c_controller.h>
 #include <tactility/drivers/i2s_controller.h>
+#include <tactility/drivers/root.h>
 #include <tactility/drivers/spi_controller.h>
 #include <tactility/drivers/uart_controller.h>
 #include <tactility/concurrent/dispatcher.h>
@@ -36,6 +37,7 @@ const struct ModuleSymbol KERNEL_SYMBOLS[] = {
     DEFINE_MODULE_SYMBOL(device_get_driver_data),
     DEFINE_MODULE_SYMBOL(device_is_added),
     DEFINE_MODULE_SYMBOL(device_is_ready),
+    DEFINE_MODULE_SYMBOL(device_is_compatible),
     DEFINE_MODULE_SYMBOL(device_lock),
     DEFINE_MODULE_SYMBOL(device_try_lock),
     DEFINE_MODULE_SYMBOL(device_unlock),
@@ -79,6 +81,8 @@ const struct ModuleSymbol KERNEL_SYMBOLS[] = {
     DEFINE_MODULE_SYMBOL(i2s_controller_get_config),
     DEFINE_MODULE_SYMBOL(i2s_controller_reset),
     DEFINE_MODULE_SYMBOL(I2S_CONTROLLER_TYPE),
+    // drivers/root
+    DEFINE_MODULE_SYMBOL(root_is_model),
     // drivers/spi_controller
     DEFINE_MODULE_SYMBOL(spi_controller_lock),
     DEFINE_MODULE_SYMBOL(spi_controller_try_lock),