5 files changed, 36 insertions, 1 deletions
diff --git a/src/video_core/engines/kepler_compute.cpp b/src/video_core/engines/kepler_compute.cpp
index 254ad6810..ae52afa79 100644
--- a/src/video_core/engines/kepler_compute.cpp
+++ b/src/video_core/engines/kepler_compute.cpp
@@ -38,6 +38,9 @@ void KeplerCompute::CallMethod(const GPU::MethodCall& method_call) {
     case KEPLER_COMPUTE_REG_INDEX(data_upload): {
         const bool is_last_call = method_call.IsLastCall();
         upload_state.ProcessData(method_call.argument, is_last_call);
+        if (is_last_call) {
+            system.GPU().Maxwell3D().OnMemoryWrite();
+        }
         break;
     }
     case KEPLER_COMPUTE_REG_INDEX(launch):
diff --git a/src/video_core/engines/kepler_memory.cpp b/src/video_core/engines/kepler_memory.cpp
index b504b450e..597872e43 100644
--- a/src/video_core/engines/kepler_memory.cpp
+++ b/src/video_core/engines/kepler_memory.cpp
@@ -33,6 +33,9 @@ void KeplerMemory::CallMethod(const GPU::MethodCall& method_call) {
     case KEPLERMEMORY_REG_INDEX(data): {
         const bool is_last_call = method_call.IsLastCall();
         upload_state.ProcessData(method_call.argument, is_last_call);
+        if (is_last_call) {
+            system.GPU().Maxwell3D().OnMemoryWrite();
+        }
         break;
     }
     }
diff --git a/src/video_core/engines/maxwell_3d.cpp b/src/video_core/engines/maxwell_3d.cpp
index 7a6bf764c..db710bf35 100644
--- a/src/video_core/engines/maxwell_3d.cpp
+++ b/src/video_core/engines/maxwell_3d.cpp
@@ -26,6 +26,8 @@ Maxwell3D::Maxwell3D(Core::System& system, VideoCore::RasterizerInterface& raste
                      MemoryManager& memory_manager)
     : system{system}, rasterizer{rasterizer}, memory_manager{memory_manager},
       macro_interpreter{*this}, upload_state{memory_manager, regs.upload} {
+    dirty.flags.flip();
+
     InitializeRegisterDefaults();
 }
 
@@ -158,7 +160,13 @@ void Maxwell3D::CallMethod(const GPU::MethodCall& method_call) {
     ASSERT_MSG(method < Regs::NUM_REGS,
                "Invalid Maxwell3D register, increase the size of the Regs structure");
 
-    regs.reg_array[method] = method_call.argument;
+    if (regs.reg_array[method] != method_call.argument) {
+        regs.reg_array[method] = method_call.argument;
+
+        for (const auto& table : dirty.tables) {
+            dirty.flags[table[method]] = true;
+        }
+    }
 
     switch (method) {
     case MAXWELL3D_REG_INDEX(macros.data): {
@@ -243,6 +251,9 @@ void Maxwell3D::CallMethod(const GPU::MethodCall& method_call) {
     case MAXWELL3D_REG_INDEX(data_upload): {
         const bool is_last_call = method_call.IsLastCall();
         upload_state.ProcessData(method_call.argument, is_last_call);
+        if (is_last_call) {
+            OnMemoryWrite();
+        }
         break;
     }
     default:
@@ -549,6 +560,7 @@ void Maxwell3D::FinishCBData() {
 
     const u32 id = cb_data_state.id;
     memory_manager.WriteBlock(address, cb_data_state.buffer[id].data(), size);
+    OnMemoryWrite();
 
     cb_data_state.id = null_cb_data;
     cb_data_state.current = null_cb_data;
diff --git a/src/video_core/engines/maxwell_3d.h b/src/video_core/engines/maxwell_3d.h
index b0fb0fb7d..72848b1e8 100644
--- a/src/video_core/engines/maxwell_3d.h
+++ b/src/video_core/engines/maxwell_3d.h
@@ -6,6 +6,7 @@
 
 #include <array>
 #include <bitset>
+#include <limits>
 #include <optional>
 #include <type_traits>
 #include <unordered_map>
@@ -1274,6 +1275,13 @@ public:
         return execute_on;
     }
 
+    /// Notify a memory write has happened.
+    void OnMemoryWrite() {
+        for (const u8 store : dirty.on_write_stores) {
+            dirty.flags[store] = true;
+        }
+    }
+
     enum class MMEDrawMode : u32 {
         Undefined,
         Array,
@@ -1289,6 +1297,12 @@ public:
         u32 gl_end_count{};
     } mme_draw;
 
+    struct {
+        std::bitset<std::numeric_limits<u8>::max()> flags;
+        std::array<std::array<u8, Regs::NUM_REGS>, 3> tables{};
+        std::array<u8, 32> on_write_stores{};
+    } dirty;
+
 private:
     void InitializeRegisterDefaults();
 
diff --git a/src/video_core/engines/maxwell_dma.cpp b/src/video_core/engines/maxwell_dma.cpp
index ae51765a6..c2610f992 100644
--- a/src/video_core/engines/maxwell_dma.cpp
+++ b/src/video_core/engines/maxwell_dma.cpp
@@ -56,6 +56,9 @@ void MaxwellDMA::HandleCopy() {
         return;
     }
 
+    // All copies here update the main memory, so mark all rasterizer states as invalid.
+    system.GPU().Maxwell3D().OnMemoryWrite();
+
     if (regs.exec.is_dst_linear && regs.exec.is_src_linear) {
         // When the enable_2d bit is disabled, the copy is performed as if we were copying a 1D
         // buffer of length `x_count`, otherwise we copy a 2D image of dimensions (x_count,