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/DisplayConnectorGroup.h

@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/RefPtr.h>
+#include <AK/Try.h>
+#include <Kernel/Devices/GPU/Console/GenericFramebufferConsole.h>
+#include <Kernel/Devices/GPU/Intel/Auxiliary/GMBusConnector.h>
+#include <Kernel/Devices/GPU/Intel/Definitions.h>
+#include <Kernel/Devices/GPU/Intel/NativeDisplayConnector.h>
+#include <Kernel/Devices/GPU/Intel/Plane/DisplayPlane.h>
+#include <Kernel/Devices/GPU/Intel/Transcoder/DisplayTranscoder.h>
+#include <Kernel/Library/LockRefPtr.h>
+#include <Kernel/Memory/TypedMapping.h>
+#include <LibEDID/EDID.h>
+
+namespace Kernel {
+
+class IntelNativeGraphicsAdapter;
+class IntelDisplayConnectorGroup : public RefCounted<IntelDisplayConnectorGroup> {
+    friend class IntelNativeGraphicsAdapter;
+
+public:
+    struct MMIORegion {
+        enum class BARAssigned {
+            BAR0,
+            BAR2,
+        };
+        BARAssigned pci_bar_assigned;
+        PhysicalAddress pci_bar_paddr;
+        size_t pci_bar_space_length;
+    };
+
+private:
+    AK_TYPEDEF_DISTINCT_ORDERED_ID(size_t, RegisterOffset);
+
+    enum class AnalogOutputRegisterOffset {
+        AnalogDisplayPort = 0x61100,
+        VGADisplayPlaneControl = 0x71400,
+    };
+
+public:
+    static ErrorOr<NonnullLockRefPtr<IntelDisplayConnectorGroup>> try_create(Badge<IntelNativeGraphicsAdapter>, IntelGraphics::Generation, MMIORegion const&, MMIORegion const&);
+
+    ErrorOr<void> set_safe_mode_setting(Badge<IntelNativeDisplayConnector>, IntelNativeDisplayConnector&);
+    ErrorOr<void> set_mode_setting(Badge<IntelNativeDisplayConnector>, IntelNativeDisplayConnector&, DisplayConnector::ModeSetting const&);
+
+private:
+    IntelDisplayConnectorGroup(IntelGraphics::Generation generation, NonnullOwnPtr<GMBusConnector>, NonnullOwnPtr<Memory::Region> registers_region, MMIORegion const&, MMIORegion const&);
+
+    ErrorOr<void> set_mode_setting(IntelNativeDisplayConnector&, DisplayConnector::ModeSetting const&);
+
+    StringView convert_analog_output_register_to_string(AnalogOutputRegisterOffset index) const;
+    void write_to_analog_output_register(AnalogOutputRegisterOffset, u32 value);
+    u32 read_from_analog_output_register(AnalogOutputRegisterOffset) const;
+    void write_to_general_register(RegisterOffset offset, u32 value);
+    u32 read_from_general_register(RegisterOffset offset) const;
+
+    // DisplayConnector initialization related methods
+    ErrorOr<void> initialize_connectors();
+    ErrorOr<void> initialize_gen4_connectors();
+
+    // General Modesetting methods
+    ErrorOr<void> set_gen4_mode_setting(IntelNativeDisplayConnector&, DisplayConnector::ModeSetting const&);
+
+    bool set_crt_resolution(DisplayConnector::ModeSetting const&);
+
+    void disable_vga_emulation();
+    void enable_vga_plane();
+
+    void disable_dac_output();
+    void enable_dac_output();
+
+    Spinlock<LockRank::None> m_control_lock;
+    Spinlock<LockRank::None> m_modeset_lock;
+    mutable Spinlock<LockRank::None> m_registers_lock;
+
+    // Note: The linux driver specifies an enum of possible ports and there is only
+    // 9 ports (PORT_{A-I}). PORT_TC{1-6} are mapped to PORT_{D-I}.
+    Array<LockRefPtr<IntelNativeDisplayConnector>, 9> m_connectors;
+
+    Array<OwnPtr<IntelDisplayTranscoder>, 5> m_transcoders;
+    Array<OwnPtr<IntelDisplayPlane>, 3> m_planes;
+
+    const MMIORegion m_mmio_first_region;
+    const MMIORegion m_mmio_second_region;
+    MMIORegion const& m_assigned_mmio_registers_region;
+
+    const IntelGraphics::Generation m_generation;
+    NonnullOwnPtr<Memory::Region> m_registers_region;
+    NonnullOwnPtr<GMBusConnector> m_gmbus_connector;
+};
+}