From faaf2009b6a272da5489a19cb33a29be2856fbf1 Mon Sep 17 00:00:00 2001
From: Adam Honse <calcprogrammer1@gmail.com>
Date: Sat, 26 Jul 2025 01:44:09 -0500
Subject: [PATCH] Add keepalive thread for Razer Blade 14 2021 and 2022 that
 sends a get device request to keep lighting active

---
 .../RazerController/RazerController.cpp       | 55 +++++++++++++++++++
 .../RazerController/RazerController.h         |  9 +++
 2 files changed, 64 insertions(+)

diff --git a/Controllers/RazerController/RazerController/RazerController.cpp b/Controllers/RazerController/RazerController/RazerController.cpp
index f964ede3..731d29fc 100644
--- a/Controllers/RazerController/RazerController/RazerController.cpp
+++ b/Controllers/RazerController/RazerController/RazerController.cpp
@@ -173,10 +173,34 @@ RazerController::RazerController(hid_device* dev_handle, hid_device* dev_argb_ha
     | Determine matrix type for device                                  |
     \*-----------------------------------------------------------------*/
     matrix_type = device_list[device_index]->matrix_type;
+
+    /*-----------------------------------------------------------------*\
+    | Start keepalive thread for devices that need it to prevent RGB    |
+    | from timing out                                                   |
+    \*-----------------------------------------------------------------*/
+    switch(dev_pid)
+    {
+        case RAZER_BLADE_14_2021_PID:
+        case RAZER_BLADE_14_2022_PID:
+            keepalive_thread_run = true;
+            keepalive_thread     = new std::thread(&RazerController::KeepaliveThreadFunction, this);
+            break;
+
+        default:
+            keepalive_thread_run = false;
+            keepalive_thread     = NULL;
+            break;
+    }
 }
 
 RazerController::~RazerController()
 {
+    if(keepalive_thread != NULL)
+    {
+        keepalive_thread_run = false;
+        keepalive_thread->join();
+    }
+
     hid_close(dev);
     delete guard_manager_ptr;
 }
@@ -211,6 +235,23 @@ std::string RazerController::GetSerialString()
     return(razer_get_serial());
 }
 
+void RazerController::KeepaliveThreadFunction()
+{
+    /*-----------------------------------------------------------------*\
+    | Performing a get device mode request seems to be enough to keep   |
+    | the lighting active on devices with the lighting timeout, so      |
+    | periodically send a device mode request every 2.5s.               |
+    \*-----------------------------------------------------------------*/
+    while(keepalive_thread_run.load())
+    {
+        if((std::chrono::steady_clock::now() - last_update_time) > 2500ms)
+        {
+            razer_get_device_mode();
+        }
+        std::this_thread::sleep_for(1s);
+    }
+}
+
 void RazerController::SetAddressableZoneSizes(unsigned char zone_1_size, unsigned char zone_2_size, unsigned char zone_3_size, unsigned char zone_4_size, unsigned char zone_5_size, unsigned char zone_6_size)
 {
     razer_report report     = razer_create_addressable_size_report(zone_1_size, zone_2_size, zone_3_size, zone_4_size, zone_5_size, zone_6_size);
@@ -996,6 +1037,20 @@ razer_report RazerController::razer_create_set_led_effect_report(unsigned char v
 | Get functions (request information from device)                                   |
 \*---------------------------------------------------------------------------------*/
 
+unsigned char RazerController::razer_get_device_mode()
+{
+    std::string         firmware_string         = "";
+    struct razer_report report                  = razer_create_report(0x00, RAZER_COMMAND_ID_GET_DEVICE_MODE, 0x02);
+    struct razer_report response_report         = razer_create_response();
+
+    std::this_thread::sleep_for(2ms);
+    razer_usb_send(&report);
+    std::this_thread::sleep_for(5ms);
+    razer_usb_receive(&response_report);
+
+    return(response_report.arguments[0]);
+}
+
 std::string RazerController::razer_get_firmware()
 {
     std::string         firmware_string         = "";
diff --git a/Controllers/RazerController/RazerController/RazerController.h b/Controllers/RazerController/RazerController/RazerController.h
index 20d9cb1a..ce6a528f 100644
--- a/Controllers/RazerController/RazerController/RazerController.h
+++ b/Controllers/RazerController/RazerController/RazerController.h
@@ -11,7 +11,10 @@
 
 #pragma once
 
+#include <atomic>
+#include <chrono>
 #include <string>
+#include <thread>
 #include <hidapi.h>
 #include "RGBController.h"
 #include "DeviceGuardManager.h"
@@ -323,6 +326,7 @@ private:
     razer_report            razer_create_set_led_effect_report(unsigned char variable_storage, unsigned char led_id, unsigned char effect);
     razer_report            razer_create_set_led_rgb_report(unsigned char variable_storage, unsigned char led_id, unsigned char* rgb_data);
 
+    unsigned char           razer_get_device_mode();
     std::string             razer_get_firmware();
     std::string             razer_get_serial();
     void                    razer_get_keyboard_info(unsigned char* layout, unsigned char* variant);
@@ -345,4 +349,9 @@ private:
     int                     razer_usb_send(razer_report* report);
     int                     razer_usb_send_argb(razer_argb_report* report);
 
+    std::chrono::time_point<std::chrono::steady_clock>  last_update_time;
+    std::atomic<bool>                                   keepalive_thread_run;
+    std::thread *                                       keepalive_thread;
+
+    void KeepaliveThreadFunction();
 };