buffer_cache: Use dynamic vertex input when available

* Fixes issues when games like dark souls rebind vertex buffers with different stride

src/video_core/buffer_cache/buffer_cache.cpp

@@ -8,6 +8,7 @@
 #include "video_core/amdgpu/liverpool.h"
 #include "video_core/buffer_cache/buffer_cache.h"
 #include "video_core/renderer_vulkan/liverpool_to_vk.h"
+#include "video_core/renderer_vulkan/liverpool_to_vk.h"
 #include "video_core/renderer_vulkan/vk_instance.h"
 #include "video_core/renderer_vulkan/vk_scheduler.h"
 
@@ -87,6 +88,15 @@ void BufferCache::DownloadBufferMemory(Buffer& buffer, VAddr device_addr, u64 si
 }
 
 bool BufferCache::BindVertexBuffers(const Shader::Info& vs_info) {
+    boost::container::small_vector<vk::VertexInputAttributeDescription2EXT, 16> attributes;
+    boost::container::small_vector<vk::VertexInputBindingDescription2EXT, 16> bindings;
+    SCOPE_EXIT {
+        if (instance.IsVertexInputDynamicState()) {
+            const auto cmdbuf = scheduler.CommandBuffer();
+            cmdbuf.setVertexInputEXT(bindings, attributes);
+        }
+    };
+
     if (vs_info.vs_inputs.empty()) {
         return false;
     }
@@ -122,6 +132,20 @@ bool BufferCache::BindVertexBuffers(const Shader::Info& vs_info) {
         }
         guest_buffers.emplace_back(buffer);
         ranges.emplace_back(buffer.base_address, buffer.base_address + buffer.GetSize());
+        attributes.push_back({
+            .location = input.binding,
+            .binding = input.binding,
+            .format = Vulkan::LiverpoolToVK::SurfaceFormat(buffer.GetDataFmt(), buffer.GetNumberFmt()),
+            .offset = 0,
+        });
+        bindings.push_back({
+            .binding = input.binding,
+            .stride = buffer.GetStride(),
+            .inputRate = input.instance_step_rate == Shader::Info::VsInput::None
+                             ? vk::VertexInputRate::eVertex
+                             : vk::VertexInputRate::eInstance,
+            .divisor = 1,
+        });
     }
 
     std::ranges::sort(ranges, [](const BufferRange& lhv, const BufferRange& rhv) {

src/video_core/renderer_vulkan/vk_graphics_pipeline.cpp

@@ -145,6 +145,9 @@ GraphicsPipeline::GraphicsPipeline(const Instance& instance_, Scheduler& schedul
         dynamic_states.push_back(vk::DynamicState::eColorWriteEnableEXT);
         dynamic_states.push_back(vk::DynamicState::eColorWriteMaskEXT);
     }
+    if (instance.IsVertexInputDynamicState()) {
+        dynamic_states.push_back(vk::DynamicState::eVertexInputEXT);
+    }
 
     const vk::PipelineDynamicStateCreateInfo dynamic_info = {
         .dynamicStateCount = static_cast<u32>(dynamic_states.size()),

src/video_core/renderer_vulkan/vk_instance.cpp

@@ -202,6 +202,8 @@ bool Instance::CreateDevice() {
     add_extension(VK_EXT_DEPTH_RANGE_UNRESTRICTED_EXTENSION_NAME);
     workgroup_memory_explicit_layout =
         add_extension(VK_KHR_WORKGROUP_MEMORY_EXPLICIT_LAYOUT_EXTENSION_NAME);
+    vertex_input_dynamic_state = add_extension(VK_EXT_VERTEX_INPUT_DYNAMIC_STATE_EXTENSION_NAME);
+
     // The next two extensions are required to be available together in order to support write masks
     color_write_en = add_extension(VK_EXT_COLOR_WRITE_ENABLE_EXTENSION_NAME);
     color_write_en &= add_extension(VK_EXT_EXTENDED_DYNAMIC_STATE_3_EXTENSION_NAME);
@@ -319,6 +321,9 @@ bool Instance::CreateDevice() {
         vk::PhysicalDeviceSynchronization2Features{
             .synchronization2 = true,
         },
+        vk::PhysicalDeviceVertexInputDynamicStateFeaturesEXT{
+            .vertexInputDynamicState = true,
+        },
     };
 
     if (!color_write_en) {
@@ -331,8 +336,8 @@ bool Instance::CreateDevice() {
     } else {
         device_chain.unlink<vk::PhysicalDeviceRobustness2FeaturesEXT>();
     }
-    if (!has_sync2) {
-        device_chain.unlink<vk::PhysicalDeviceSynchronization2Features>();
+    if (!vertex_input_dynamic_state) {
+        device_chain.unlink<vk::PhysicalDeviceVertexInputDynamicStateFeaturesEXT>();
     }
 
     try {

src/video_core/renderer_vulkan/vk_instance.h

@@ -132,6 +132,11 @@ public:
         return color_write_en;
     }
 
+    /// Returns true when VK_EXT_vertex_input_dynamic_state is supported.
+    bool IsVertexInputDynamicState() const {
+        return vertex_input_dynamic_state;
+    }
+
     /// Returns the vendor ID of the physical device
     u32 GetVendorID() const {
         return properties.vendorID;
@@ -257,6 +262,7 @@ private:
     bool external_memory_host{};
     bool workgroup_memory_explicit_layout{};
     bool color_write_en{};
+    bool vertex_input_dynamic_state{};
     u64 min_imported_host_pointer_alignment{};
     u32 subgroup_size{};
     bool tooling_info{};