amdgpu: use gtt_used for APUs

src/gpu.cpp

@@ -137,4 +137,12 @@ void getAmdGpuInfo(){
             value = 0;
         gpu_info.temp = value / 1000;
     }
+
+    if (amdgpu.gtt_used) {
+        rewind(amdgpu.gtt_used);
+        fflush(amdgpu.gtt_used);
+        if (fscanf(amdgpu.gtt_used, "%" PRId64, &value) != 1)
+            value = 0;
+        gpu_info.gtt_used = float(value) / (1024 * 1024 * 1024);
+    }
 }

src/gpu.h

@@ -16,6 +16,7 @@ struct amdgpu_files
     FILE *core_clock;
     FILE *memory_clock;
     FILE *power_usage;
+    FILE *gtt_used;
 };
 
 extern amdgpu_files amdgpu;
@@ -34,6 +35,7 @@ struct gpuInfo{
     bool is_current_throttled;
     bool is_temp_throttled;
     bool is_other_throttled;
+    float gtt_used;
 };
 
 extern struct gpuInfo gpu_info;

src/hud_elements.cpp

@@ -343,7 +343,11 @@ void HudElements::vram(){
         ImGui::TableNextRow(); ImGui::TableNextColumn();
         ImGui::TextColored(HUDElements.colors.vram, "VRAM");
         ImGui::TableNextColumn();
-        right_aligned_text(HUDElements.colors.text, HUDElements.ralign_width, "%.1f", gpu_info.memoryUsed);
+        // Add gtt_used to vram usage for APUs
+        if (cpuStats.cpu_type == "APU")
+            right_aligned_text(HUDElements.colors.text, HUDElements.ralign_width, "%.1f", gpu_info.memoryUsed + gpu_info.gtt_used);
+        else
+            right_aligned_text(HUDElements.colors.text, HUDElements.ralign_width, "%.1f", gpu_info.memoryUsed);
         ImGui::SameLine(0,1.0f);
         ImGui::PushFont(HUDElements.sw_stats->font1);
         ImGui::Text("GiB");

src/overlay.cpp

@@ -676,6 +676,8 @@ void init_gpu_stats(uint32_t& vendorID, uint32_t reported_deviceID, overlay_para
             amdgpu.vram_total = fopen((path + "/mem_info_vram_total").c_str(), "r");
          if (!amdgpu.vram_used)
             amdgpu.vram_used = fopen((path + "/mem_info_vram_used").c_str(), "r");
+         if (!amdgpu.gtt_used)
+            amdgpu.gtt_used = fopen((path + "/mem_info_gtt_used").c_str(), "r");
          
          path += "/hwmon/";
          auto dirs = ls(path.c_str(), "hwmon", LS_DIRS);