feat: expand Intel GPU display management

kernel/src/Graphics/Framebuffer.cpp

@@ -17,12 +17,20 @@ namespace Graphics::Framebuffer {
     static uint64_t  g_FbWidth  = 0;
     static uint64_t  g_FbHeight = 0;
     static uint64_t  g_FbPitch  = 0; // in bytes
+    static uint8_t   g_Edid[256] = {};
+    static uint64_t  g_EdidSize  = 0;
 
     void Initialize(const montauk::boot::Framebuffer& framebuffer) {
         g_FbBase   = reinterpret_cast<uint32_t*>(framebuffer.address);
         g_FbWidth  = framebuffer.width;
         g_FbHeight = framebuffer.height;
         g_FbPitch  = framebuffer.pitch;
+        g_EdidSize = framebuffer.edidSize;
+        if (g_EdidSize > sizeof(g_Edid)) g_EdidSize = sizeof(g_Edid);
+        if (framebuffer.edid == nullptr) g_EdidSize = 0;
+        for (uint64_t i = 0; i < g_EdidSize; i++) {
+            g_Edid[i] = framebuffer.edid[i];
+        }
 
         Kt::KernelLogStream(Kt::OK, "Graphics") << "Framebuffer initialized ("
             << (uint64_t)g_FbWidth << "x" << (uint64_t)g_FbHeight << ")";
@@ -32,6 +40,10 @@ namespace Graphics::Framebuffer {
     uint64_t  GetWidth()  { return g_FbWidth; }
     uint64_t  GetHeight() { return g_FbHeight; }
     uint64_t  GetPitch()  { return g_FbPitch; }
+    const uint8_t* GetEdid(uint64_t* size) {
+        if (size) *size = g_EdidSize;
+        return g_EdidSize ? g_Edid : nullptr;
+    }
 
     void Set(uint32_t* base, uint64_t width, uint64_t height, uint64_t pitch) {
         g_FbBase = base;