Added a test to see hot-swapping of upscalers in action

com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/HDDynamicResolution.cs

@@ -1,7 +1,9 @@
 using UnityEngine;
 using UnityEngine.Rendering;
 using System;
+using System.Collections;
 using System.Diagnostics;
+using UnityEngine.Rendering.HighDefinition.AMD;
 
 /// <summary>
 /// Component that controls dynamic resolution scaling in HDRP (High Definition Render Pipeline) via DRH (Dynamic Resolution Handler).
@@ -194,14 +196,32 @@ public class HDDynamicResolution : MonoBehaviour
 
     void OnEnable()
     {
+        StartCoroutine(CSwapUpscalers());
     }
 
     void OnDisable()
     {
+        StopAllCoroutines();
+        
         ResetScale();
         ResetCounters();
     }
 
+    IEnumerator CSwapUpscalers()
+    {
+        var wait = new WaitForSeconds(5f);
+        int pluginIndex = 0;
+        
+        while (true)
+        {
+            yield return wait;
+
+            var plugins = AMDUnityPlugin.GetAvailablePlugins();
+            pluginIndex = (pluginIndex + 1) % plugins.Count;
+            AMDUnityPlugin.SetActivePlugin(pluginIndex);
+        }
+    }
+
     void Start()
     {
     }
@@ -267,14 +287,15 @@ public class HDDynamicResolution : MonoBehaviour
 
             GUILayout.Label(
                 string.Format(
-                    "Resolution: {0} x {1}\nScale: {2:F3}\nCPU: {3:F3}\nGPU Ave: {4:F3} Max: {5:F3} Min: {6:F3}",
+                    "Resolution: {0} x {1}\nScale: {2:F3}\nCPU: {3:F3}\nGPU Ave: {4:F3} Max: {5:F3} Min: {6:F3}\nUpscaler: {7}",
                     drsWidth,
                     drsHeight,
                     scaleX,
                     m_SampledCPUFrameTime,
                     m_GPUFrameTime,
                     m_SampledMaxGPUFrameTime,
-                    m_SampledMinGPUFrameTime),
+                    m_SampledMinGPUFrameTime,
+                    AMDUnityPlugin.ActivePlugin?.name),
                 m_DebugStyle);
         }
 #endif

com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/RenderPass/Upscalers/UpscalerPlugin.cs

@@ -15,8 +15,9 @@ namespace UnityEngine.Rendering.HighDefinition.AMD
             new FSR2Wrapper.FSR2WrapperUpscaler(),
 #endif
         };
-        
-        internal static UpscalerPlugin ActivePlugin = AvailablePlugins[0];
+
+        private static UpscalerPlugin _activePlugin = AvailablePlugins[0];
+        public static UpscalerPlugin ActivePlugin => _activePlugin;
 
         public static bool Load() => ActivePlugin.Load();
 
@@ -70,16 +71,16 @@ namespace UnityEngine.Rendering.HighDefinition.AMD
             if (newPlugin == null || !newPlugin.isSupported)
                 return false;
 
-            if (newPlugin == ActivePlugin)
+            if (newPlugin == _activePlugin)
                 return true;
 
             if (!newPlugin.IsLoaded() && !newPlugin.Load())
                 return false;
             
             // Hot-swap the upscaler contexts, so HDRP can keep calling the same FSR2Contexts without knowing the underlying implementation has changed.
-            GraphicsDevice.device.RecreateFeatures(ActivePlugin, newPlugin);
+            GraphicsDevice.device.RecreateFeatures(_activePlugin, newPlugin);
             
-            ActivePlugin = newPlugin;
+            _activePlugin = newPlugin;
             return true;
         }
     }