Show amdgpu voltage from hwmon

Added config parameter 'gpu_voltage'

README.md

@@ -364,6 +364,7 @@ Parameters that are enabled by default have to be explicitly disabled. These (cu
 | `gpu_load_color`                   | Set the colors for the gpu load change low,medium and high. e.g `gpu_load_color=0000FF,00FFFF,FF00FF` |
 | `gpu_load_value`                   | Set the values for medium and high load e.g `gpu_load_value=50,90`                    |
 | `gpu_name`                         | Display GPU name from pci.ids                                                         |
+| `gpu_voltage`                      | Display GPU voltage (only works on AMD GPUs)                                          |
 | `hide_fsr_sharpness`               | Hides the sharpness info for the `fsr` option (only available in gamescope)           |
 | `histogram`                        | Change FPS graph to histogram                                                         |
 | `horizontal`                       | Display Mangohud in a horizontal position                                             |

data/MangoHud.conf

@@ -87,6 +87,7 @@ gpu_stats
 # gpu_load_color=39F900,FDFD09,B22222
 ## GPU fan in rpm (only works on AMD GPUs)
 # gpu_fan
+# gpu_voltage (only works on AMD GPUs)
 
 ### Display the current CPU information
 cpu_stats

src/gpu.cpp

@@ -182,5 +182,13 @@ void getAmdGpuInfo(){
             value = 0;
         gpu_info.gtt_used = float(value) / (1024 * 1024 * 1024);
     }
+
+    if (amdgpu.gpu_voltage_soc) {
+        rewind(amdgpu.gpu_voltage_soc);
+        fflush(amdgpu.gpu_voltage_soc);
+        if (fscanf(amdgpu.gpu_voltage_soc, "%" PRId64, &value) != 1)
+            value = 0;
+        gpu_info.voltage = value;
+    }
 #endif
 }

src/gpu.h

@@ -20,6 +20,7 @@ struct amdgpu_files
     FILE *power_usage;
     FILE *gtt_used;
     FILE *fan;
+    FILE *gpu_voltage_soc;
 };
 
 extern amdgpu_files amdgpu;
@@ -42,6 +43,7 @@ struct gpuInfo{
     bool is_other_throttled;
     float gtt_used;
     int fan_speed;
+    int voltage;
 };
 
 extern struct gpuInfo gpu_info;

src/hud_elements.cpp

@@ -261,6 +261,15 @@ void HudElements::gpu_stats(){
             HUDElements.TextColored(HUDElements.colors.text, "W");
             ImGui::PopFont();
         }
+
+        if (HUDElements.params->enabled[OVERLAY_PARAM_ENABLED_gpu_voltage]) {
+            ImguiNextColumnOrNewRow();
+            right_aligned_text(text_color, HUDElements.ralign_width, "%i", gpu_info.voltage);
+            ImGui::SameLine(0, 1.0f);
+            ImGui::PushFont(HUDElements.sw_stats->font1);
+            HUDElements.TextColored(HUDElements.colors.text, "mV");
+            ImGui::PopFont();
+        }
     }
 }
 

src/overlay.cpp

@@ -886,6 +886,8 @@ void init_gpu_stats(uint32_t& vendorID, uint32_t reported_deviceID, overlay_para
                amdgpu.memory_temp = fopen((hwmon_path + dir + "/temp3_input").c_str(), "r");
             if (!amdgpu.core_clock)
                amdgpu.core_clock = fopen((hwmon_path + dir + "/freq1_input").c_str(), "r");
+            if (!amdgpu.gpu_voltage_soc)
+               amdgpu.gpu_voltage_soc = fopen((hwmon_path + dir + "/in0_input").c_str(), "r"); 
          }
 
          if (!metrics_path.empty())

src/overlay_params.cpp

@@ -607,6 +607,7 @@ static void set_param_defaults(struct overlay_params *params){
    params->enabled[OVERLAY_PARAM_ENABLED_gpu_load_change] = false;
    params->enabled[OVERLAY_PARAM_ENABLED_cpu_load_change] = false;
    params->enabled[OVERLAY_PARAM_ENABLED_core_load_change] = false;
+   params->enabled[OVERLAY_PARAM_ENABLED_gpu_voltage] = false;
    params->enabled[OVERLAY_PARAM_ENABLED_legacy_layout] = true;
    params->enabled[OVERLAY_PARAM_ENABLED_frametime] = true;
    params->enabled[OVERLAY_PARAM_ENABLED_fps_only] = false;

src/overlay_params.h

@@ -98,6 +98,7 @@ typedef unsigned long KeySym;
    OVERLAY_PARAM_BOOL(bicubic)                       \
    OVERLAY_PARAM_BOOL(retro)                         \
    OVERLAY_PARAM_BOOL(gpu_fan)                       \
+   OVERLAY_PARAM_BOOL(gpu_voltage)                   \
    OVERLAY_PARAM_BOOL(engine_short_names)            \
    OVERLAY_PARAM_BOOL(text_outline)                  \
    OVERLAY_PARAM_BOOL(temp_fahrenheit)               \