Kernel: Move all Graphics-related code into Devices/GPU directory

Like the HID, Audio and Storage subsystem, the Graphics subsystem (which
handles GPUs technically) exposes unix device files (typically in /dev).
To ensure consistency across the repository, move all related files to a
new directory under Kernel/Devices called "GPU".

Also remove the redundant "GPU" word from the VirtIO driver directory,
and the word "Graphics" from GraphicsManagement.{h,cpp} filenames.

Kernel/Devices/GPU/Intel/NativeDisplayConnector.h

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Try.h>
+#include <Kernel/Devices/GPU/Console/GenericFramebufferConsole.h>
+#include <Kernel/Devices/GPU/Definitions.h>
+#include <Kernel/Devices/GPU/DisplayConnector.h>
+#include <Kernel/Devices/GPU/Intel/Auxiliary/GMBusConnector.h>
+#include <Kernel/Library/LockRefPtr.h>
+#include <Kernel/Memory/TypedMapping.h>
+
+namespace Kernel {
+
+class IntelDisplayConnectorGroup;
+class IntelNativeDisplayConnector final
+    : public DisplayConnector {
+    friend class IntelDisplayConnectorGroup;
+    friend class DeviceManagement;
+
+public:
+    enum class Type {
+        Invalid,
+        Analog,
+        DVO,
+        LVDS,
+        TVOut,
+        HDMI,
+        DisplayPort,
+        EmbeddedDisplayPort,
+    };
+
+    enum class ConnectorIndex : size_t {
+        PortA = 0,
+        PortB = 1,
+        PortC = 2,
+        PortD = 3,
+        PortE = 4,
+        PortF = 5,
+        PortH = 6,
+        PortG = 7,
+        PortI = 8,
+    };
+
+    static ErrorOr<NonnullLockRefPtr<IntelNativeDisplayConnector>> try_create_with_display_connector_group(IntelDisplayConnectorGroup const&, ConnectorIndex, Type, PhysicalAddress framebuffer_address, size_t framebuffer_resource_size);
+
+    void set_edid_bytes(Badge<IntelDisplayConnectorGroup>, Array<u8, 128> const& edid_bytes);
+    ErrorOr<void> create_attached_framebuffer_console(Badge<IntelDisplayConnectorGroup>);
+
+    ConnectorIndex connector_index() const { return m_connector_index; }
+
+private:
+    // ^DisplayConnector
+    // FIXME: Implement modesetting capabilities in runtime from userland...
+    virtual bool mutable_mode_setting_capable() const override { return false; }
+    // FIXME: Implement double buffering capabilities in runtime from userland...
+    virtual bool double_framebuffering_capable() const override { return false; }
+    virtual ErrorOr<void> set_mode_setting(ModeSetting const&) override;
+    virtual ErrorOr<void> set_safe_mode_setting() override;
+    virtual ErrorOr<void> set_y_offset(size_t y) override;
+    virtual ErrorOr<void> unblank() override;
+    virtual ErrorOr<void> flush_first_surface() override final;
+    virtual void enable_console() override;
+    virtual void disable_console() override;
+    virtual bool partial_flush_support() const override { return false; }
+    virtual bool flush_support() const override { return false; }
+    // Note: Paravirtualized hardware doesn't require a defined refresh rate for modesetting.
+    virtual bool refresh_rate_support() const override { return true; }
+
+    IntelNativeDisplayConnector(IntelDisplayConnectorGroup const&, ConnectorIndex connector_index, Type, PhysicalAddress framebuffer_address, size_t framebuffer_resource_size);
+    Type const m_type { Type::Analog };
+    ConnectorIndex const m_connector_index { 0 };
+    NonnullLockRefPtr<IntelDisplayConnectorGroup> m_parent_connector_group;
+    LockRefPtr<Graphics::GenericFramebufferConsole> m_framebuffer_console;
+};
+}