Initial AMD GPU implementation

Partially implements https://github.com/scorpion-26/gBar/issues/5
The spammy logs will remain, until it is confirmed, that it works.

meson.build

@@ -25,6 +25,10 @@ if get_option('WithNvidia')
   add_global_arguments('-DWITH_NVIDIA', language: 'cpp')
   headers += 'src/NvidiaGPU.h'
 endif
+if get_option('WithAMD')
+  add_global_arguments('-DWITH_AMD', language: 'cpp')
+  headers += 'src/AMDGPU.h'
+endif
 if get_option('WithBlueZ')
   add_global_arguments('-DWITH_BLUEZ', language: 'cpp')
 endif

meson_options.txt

@@ -1,5 +1,6 @@
 option('WithHyprland', type: 'boolean', value : true)
 option('WithNvidia', type: 'boolean', value : true)
+option('WithAMD', type: 'boolean', value : true)
 option('WithBlueZ', type: 'boolean', value : true)
 
 # You shouldn't enable this, unless you know what you are doing!

src/AMDGPU.h

@@ -0,0 +1,79 @@
+#include "Common.h"
+#include "Config.h"
+
+#include <fstream>
+
+#ifdef WITH_AMD
+namespace AMDGPU
+{
+    static const char* utilizationFile = "/sys/class/drm/card0/device/gpu_busy_percent";
+    static const char* vramTotalFile = "/sys/class/drm/card0/device/mem_info_vram_total";
+    static const char* vramUsedFile = "/sys/class/drm/card0/device/mem_info_vram_used";
+
+    inline void Init()
+    {
+        // Test for drm device files
+        std::ifstream test(utilizationFile);
+        if (!test.is_open())
+        {
+            LOG("AMD GPU not found, disabling AMD GPU");
+            RuntimeConfig::Get().hasAMD = false;
+        }
+    }
+
+    inline uint32_t GetUtilization()
+    {
+        if (!RuntimeConfig::Get().hasAMD)
+        {
+            LOG("Error: Called AMD GetUtilization, but AMD GPU wasn't found!");
+            return {};
+        }
+
+        std::ifstream file(utilizationFile);
+        std::string line;
+        std::getline(file, line);
+        LOG("AMD GetUtilization: " << line);
+        return atoi(line.c_str());
+    }
+
+    inline uint32_t GetTemperature()
+    {
+        if (!RuntimeConfig::Get().hasAMD)
+        {
+            LOG("Error: Called AMD GetTemperature, but AMD GPU wasn't found!");
+            return {};
+        }
+        // TODO!
+        return 0;
+    }
+
+    struct VRAM 
+    {
+        uint32_t totalB;
+        uint32_t usedB;
+    };
+
+    inline VRAM GetVRAM()
+    {
+        if (!RuntimeConfig::Get().hasAMD)
+        {
+            LOG("Error: Called AMD GetVRAM, but AMD GPU wasn't found!");
+            return {};
+        }
+        VRAM mem{};
+
+        std::ifstream file(vramTotalFile);
+        std::string line;
+        std::getline(file, line);
+        LOG("AMD GetVRAM(total): " << line);
+        mem.totalB = atoi(line.c_str());
+    
+        file = std::ifstream(vramUsedFile);
+        std::getline(file, line);
+        LOG("AMD GetVRAM(total): " << line);
+        mem.usedB = atoi(line.c_str());
+
+        return mem;
+    }
+}
+#endif

src/Bar.cpp

@@ -52,7 +52,7 @@ namespace Bar
             return TimerResult::Ok;
         }
 
-#ifdef WITH_NVIDIA
+#if defined WITH_NVIDIA || defined WITH_AMD
         static Text* gpuText;
         static TimerResult UpdateGPU(CairoSensor& sensor)
         {
@@ -272,8 +272,8 @@ namespace Bar
     void WidgetSensors(Widget& parent)
     {
         Sensor(parent, DynCtx::UpdateDisk, "disk-util-progress", "disk-data-text", DynCtx::diskText);
-#ifdef WITH_NVIDIA
+#if defined WITH_NVIDIA || defined WITH_AMD
-        if (RuntimeConfig::Get().hasNvidia)
+        if (RuntimeConfig::Get().hasNvidia || RuntimeConfig::Get().hasAMD)
         {
             Sensor(parent, DynCtx::UpdateVRAM, "vram-util-progress", "vram-data-text", DynCtx::vramText);
             Sensor(parent, DynCtx::UpdateGPU, "gpu-util-progress", "gpu-data-text", DynCtx::gpuText);

src/Config.h

@@ -28,6 +28,11 @@ public:
 #else
     bool hasNvidia = false;
 #endif
+#ifdef WITH_AMD
+    bool hasAMD = true;
+#else
+    bool hasAMD = false;
+#endif
 
 #ifdef WITH_HYPRLAND
     bool hasHyprland = true;

src/System.cpp

@@ -1,6 +1,7 @@
 #include "System.h"
 #include "Common.h"
 #include "NvidiaGPU.h"
+#include "AMDGPU.h"
 #include "PulseAudio.h"
 #include "Hyprland.h"
 #include "Config.h"
@@ -133,8 +134,11 @@ namespace System
         return out;
     }
 
-#ifdef WITH_NVIDIA
+#if defined WITH_NVIDIA || defined WITH_AMD
     GPUInfo GetGPUInfo()
+    {
+#ifdef WITH_NVIDIA
+        if (RuntimeConfig::Get().hasNvidia)
         {
             NvidiaGPU::GPUUtilization util = NvidiaGPU::GetUtilization();
             GPUInfo out;
@@ -142,8 +146,24 @@ namespace System
             out.coreTemp = NvidiaGPU::GetTemperature();
             return out;
         }
+#endif
+#ifdef WITH_AMD
+        if (RuntimeConfig::Get().hasAMD)
+        {
+            uint32_t util = AMDGPU::GetUtilization();
+            GPUInfo out;
+            out.utilisation = util;
+            out.coreTemp = AMDGPU::GetTemperature();
+            return out;
+        }
+#endif
+        return {};
+    }
 
     VRAMInfo GetVRAMInfo()
+    {
+#ifdef WITH_NVIDIA
+        if (RuntimeConfig::Get().hasNvidia)
         {
             NvidiaGPU::VRAM vram = NvidiaGPU::GetVRAM();
             VRAMInfo out;
@@ -152,6 +172,19 @@ namespace System
             return out;
         }
 #endif
+#ifdef WITH_AMD
+        if (RuntimeConfig::Get().hasAMD)
+        {
+            AMDGPU::VRAM vram = AMDGPU::GetVRAM();
+            VRAMInfo out;
+            out.totalGiB = (double)vram.totalB / (1024 * 1024 * 1024);
+            out.usedGiB = (double)vram.usedB / (1024 * 1024 * 1024);
+            return out;
+        }
+#endif
+        return {};
+    }
+#endif
 
     DiskInfo GetDiskInfo()
     {
@@ -413,13 +446,16 @@ namespace System
     {
         return Hyprland::Goto(workspace);
     }
-    std::string GetWorkspaceSymbol(int index) {
+    std::string GetWorkspaceSymbol(int index)
-        if (index < 0 || index > 9) {
+    {
+        if (index < 0 || index > 9)
+        {
             LOG("Workspace Symbol Index Out Of Bounds: " + std::to_string(index));
             return "";
         }
 
-        if (Config::Get().workspaceSymbols[index].empty()) {
+        if (Config::Get().workspaceSymbols[index].empty())
+        {
             return Config::Get().defaultWorkspaceSymbol + " ";
         }
 
@@ -469,6 +505,10 @@ namespace System
         NvidiaGPU::Init();
 #endif
 
+#ifdef WITH_AMD
+        AMDGPU::Init();
+#endif
+
 #ifdef WITH_HYPRLAND
         Hyprland::Init();
 #endif

src/System.h

@@ -19,7 +19,7 @@ namespace System
     };
     RAMInfo GetRAMInfo();
 
-#ifdef WITH_NVIDIA
+#if defined WITH_NVIDIA || defined WITH_AMD
     struct GPUInfo
     {
         double utilisation;