[vk, Maxwell] Refining support for HDR Formats based on Specs

src/video_core/compatible_formats.cpp

@@ -42,7 +42,7 @@ constexpr std::array VIEW_CLASS_32_BITS{
     PixelFormat::A2B10G10R10_UNORM, PixelFormat::R16G16_UINT,     PixelFormat::R32_UINT,
     PixelFormat::R16G16_SINT,       PixelFormat::R32_SINT,        PixelFormat::A8B8G8R8_UNORM,
     PixelFormat::R16G16_UNORM,      PixelFormat::A8B8G8R8_SNORM,  PixelFormat::R16G16_SNORM,
-    PixelFormat::A8B8G8R8_SRGB,     PixelFormat::E5B9G9R9_FLOAT,  PixelFormat::B8G8R8A8_UNORM,
+    PixelFormat::A8B8G8R8_SRGB,     PixelFormat::B8G8R8A8_UNORM,
     PixelFormat::B8G8R8A8_SRGB,     PixelFormat::A8B8G8R8_UINT,   PixelFormat::A8B8G8R8_SINT,
     PixelFormat::A2B10G10R10_UINT,
 };
@@ -52,7 +52,7 @@ constexpr std::array VIEW_CLASS_32_BITS_NO_BGR{
     PixelFormat::A2B10G10R10_UNORM, PixelFormat::R16G16_UINT,      PixelFormat::R32_UINT,
     PixelFormat::R16G16_SINT,       PixelFormat::R32_SINT,         PixelFormat::A8B8G8R8_UNORM,
     PixelFormat::R16G16_UNORM,      PixelFormat::A8B8G8R8_SNORM,   PixelFormat::R16G16_SNORM,
-    PixelFormat::A8B8G8R8_SRGB,     PixelFormat::E5B9G9R9_FLOAT,   PixelFormat::A8B8G8R8_UINT,
+    PixelFormat::A8B8G8R8_SRGB,     PixelFormat::A8B8G8R8_UINT,
     PixelFormat::A8B8G8R8_SINT,     PixelFormat::A2B10G10R10_UINT,
 };
 

src/video_core/renderer_vulkan/maxwell_to_vk.cpp

@@ -214,7 +214,7 @@ struct FormatTuple {
     {VK_FORMAT_ASTC_8x6_SRGB_BLOCK},                           // ASTC_2D_8X6_SRGB
     {VK_FORMAT_ASTC_6x5_UNORM_BLOCK},                          // ASTC_2D_6X5_UNORM
     {VK_FORMAT_ASTC_6x5_SRGB_BLOCK},                           // ASTC_2D_6X5_SRGB
-    {VK_FORMAT_E5B9G9R9_UFLOAT_PACK32, Attachable | Storage},  // E5B9G9R9_FLOAT
+    {VK_FORMAT_E5B9G9R9_UFLOAT_PACK32},                        // E5B9G9R9_FLOAT (SAMPLED_IMAGE only, no COLOR_ATTACHMENT)
 
     // Depth formats
     {VK_FORMAT_D32_SFLOAT, Attachable},          // D32_FLOAT

src/video_core/renderer_vulkan/vk_texture_cache.cpp

@@ -168,8 +168,7 @@ constexpr VkBorderColor ConvertBorderColor(const std::array<float, 4>& color) {
 
     const auto vk_format = MaxwellToVK::SurfaceFormat(device, FormatType::Optimal, 
                                                       false, info.format).format;
-    const bool is_hdr_format = vk_format == VK_FORMAT_B10G11R11_UFLOAT_PACK32 ||
-                               vk_format == VK_FORMAT_E5B9G9R9_UFLOAT_PACK32;
+    const bool is_hdr_format = vk_format == VK_FORMAT_B10G11R11_UFLOAT_PACK32;
 
     if (!is_hdr_format) {
         return info;
@@ -1361,7 +1360,6 @@ void TextureCacheRuntime::ConvertImage(Framebuffer* dst, ImageView& dst_view, Im
     case PixelFormat::ASTC_2D_8X6_SRGB:
     case PixelFormat::ASTC_2D_6X5_UNORM:
     case PixelFormat::ASTC_2D_6X5_SRGB:
-    case PixelFormat::E5B9G9R9_FLOAT:
     case PixelFormat::D32_FLOAT:
     case PixelFormat::D16_UNORM:
     case PixelFormat::X8_D24_UNORM:

src/video_core/vulkan_common/vulkan_device.cpp

@@ -105,6 +105,17 @@ constexpr std::array B10G11R11_UFLOAT_PACK32{
     VK_FORMAT_UNDEFINED,
 };
 
+// E5B9G9R9_UFLOAT (RGB9E5) - INVALID for COLOR_ATTACHMENT on Nintendo Switch
+// Nintendo Switch hardware validation: NO COLOR_ATTACHMENT_BIT (only SAMPLED_IMAGE)
+// Reference: vp_gpuinfo_nintendo_switch_v2_495_0_0_0 - Missing required attachment bits
+// This format should NEVER be used as render target, only for texture sampling
+constexpr std::array E5B9G9R9_UFLOAT_PACK32{
+    VK_FORMAT_B10G11R11_UFLOAT_PACK32,    // Upgrade to proper HDR format with attachment support
+    VK_FORMAT_A8B8G8R8_UNORM_PACK32,      // Fallback: RGBA8 LDR
+    VK_FORMAT_R16G16B16A16_SFLOAT,        // Last resort: RGBA16F
+    VK_FORMAT_UNDEFINED,
+};
+
 } // namespace Alternatives
 
 template <typename T>
@@ -139,6 +150,8 @@ constexpr const VkFormat* GetFormatAlternatives(VkFormat format) {
         return Alternatives::VK_FORMAT_A4B4G4R4_UNORM_PACK16.data();
     case VK_FORMAT_B10G11R11_UFLOAT_PACK32:
         return Alternatives::B10G11R11_UFLOAT_PACK32.data();
+    case VK_FORMAT_E5B9G9R9_UFLOAT_PACK32:
+        return Alternatives::E5B9G9R9_UFLOAT_PACK32.data();
     default:
         return nullptr;
     }
@@ -974,7 +987,7 @@ VkFormat Device::GetSupportedFormat(VkFormat wanted_format, VkFormatFeatureFlags
         if (wanted_format == VK_FORMAT_B10G11R11_UFLOAT_PACK32) {
             LOG_WARNING(Render_Vulkan,
                   "B10G11R11_UFLOAT_PACK32 (R11G11B10F HDR format) not fully supported. "
-                  "Falling back to {} on {}. Expect 4x memory usage and reduced performance.",
+                  "Falling back to {} on {}",
                   alternative, properties.properties.deviceName);
         } else {
             LOG_DEBUG(Render_Vulkan,