hocclk: reduce ram usage and add display undervolt

Source/hoc-clk/overlay/src/ui/gui/about_gui.cpp

@@ -31,6 +31,7 @@ tsl::elm::ListItem* RETROStatusItem = NULL;
 tsl::elm::ListItem* waferCordsItem = NULL;
 tsl::elm::ListItem* ramVoltItem = NULL;
 tsl::elm::ListItem* eristaPLLXItem = NULL;
+tsl::elm::ListItem* dispVoltItem = NULL;
 
 ImageElement* CatImage = NULL;
 HideableCategoryHeader* CatHeader = NULL;
@@ -56,6 +57,10 @@ void AboutGui::listUI()
         new tsl::elm::ListItem("RAM Voltage:");
     this->listElement->addItem(ramVoltItem);
 
+    dispVoltItem =
+        new tsl::elm::ListItem("Display Voltage:");
+    this->listElement->addItem(dispVoltItem);
+
     eristaPLLXItem =
         new tsl::elm::ListItem("PLLX Temp:");
     if(IsErista()) {
@@ -327,5 +332,8 @@ void AboutGui::refresh()
 
     sprintf(strings[4], "%u.%u / %u mV", context->voltages[HocClkVoltage_EMCVDD2] / 1000U, (context->voltages[HocClkVoltage_EMCVDD2] % 1000U) / 100U, context->voltages[HocClkVoltage_EMCVDDQ] / 1000);
     ramVoltItem->setValue(strings[4]);
+    
+    sprintf(strings[5], "%u.%u mV", context->voltages[HocClkVoltage_Display] / 1000U, (context->voltages[HocClkVoltage_Display] % 1000U) / 100U);
+    dispVoltItem->setValue(strings[5]);
 
 }

Source/hoc-clk/overlay/src/ui/gui/misc_gui.cpp

@@ -621,6 +621,8 @@ public:
 
 protected:
     void listUI() override {
+        ValueThresholds thresholdsDisabled(0, 0);
+        
         BaseMenuGui::refresh(); // get latest context
         if(!this->context)
             return;
@@ -649,6 +651,16 @@ protected:
                 false
             );
         }
+        addConfigButton(
+            HocClkConfigValue_DisplayVoltage,
+            "Display Voltage",
+            ValueRange(900, 1200, 25, " mV", 1),
+            "Display Voltage",
+            &thresholdsDisabled,
+            {},
+            {},
+            false
+        );
     }
 };