Kernel/Graphics: Move GenericDisplayConnector code to a new sub-folder

In the same fashion like in the Linux kernel, we support pre-initialized
framebuffers that were set up by either the BIOS or the bootloader.
These framebuffers can be backed by any kind of video hardware, and are
not tied to VGA hardware at all. Therefore, this code should be in a
separate sub-folder in the Graphics subsystem to indicate this.

Kernel/Graphics/Generic/DisplayConnector.cpp

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <Kernel/Arch/x86/IO.h>
+#include <Kernel/Debug.h>
+#include <Kernel/Devices/DeviceManagement.h>
+#include <Kernel/Graphics/Console/ContiguousFramebufferConsole.h>
+#include <Kernel/Graphics/Generic/DisplayConnector.h>
+#include <Kernel/Graphics/GraphicsManagement.h>
+
+namespace Kernel {
+
+NonnullRefPtr<GenericDisplayConnector> GenericDisplayConnector::must_create_with_preset_resolution(PhysicalAddress framebuffer_address, size_t width, size_t height, size_t pitch)
+{
+    auto device_or_error = DeviceManagement::try_create_device<GenericDisplayConnector>(framebuffer_address, width, height, pitch);
+    VERIFY(!device_or_error.is_error());
+    auto connector = device_or_error.release_value();
+    MUST(connector->create_attached_framebuffer_console());
+    MUST(connector->initialize_edid_for_generic_monitor({}));
+    return connector;
+}
+
+GenericDisplayConnector::GenericDisplayConnector(PhysicalAddress framebuffer_address, size_t width, size_t height, size_t pitch)
+    : DisplayConnector(framebuffer_address, height * pitch, true)
+{
+    m_current_mode_setting.horizontal_active = width;
+    m_current_mode_setting.vertical_active = height;
+    m_current_mode_setting.horizontal_stride = pitch;
+}
+
+ErrorOr<void> GenericDisplayConnector::create_attached_framebuffer_console()
+{
+    auto width = m_current_mode_setting.horizontal_active;
+    auto height = m_current_mode_setting.vertical_active;
+    auto pitch = m_current_mode_setting.horizontal_stride;
+
+    m_framebuffer_console = Graphics::ContiguousFramebufferConsole::initialize(m_framebuffer_address.value(), width, height, pitch);
+    GraphicsManagement::the().set_console(*m_framebuffer_console);
+    return {};
+}
+
+void GenericDisplayConnector::enable_console()
+{
+    VERIFY(m_control_lock.is_locked());
+    VERIFY(m_framebuffer_console);
+    m_framebuffer_console->enable();
+}
+
+void GenericDisplayConnector::disable_console()
+{
+    VERIFY(m_control_lock.is_locked());
+    VERIFY(m_framebuffer_console);
+    m_framebuffer_console->disable();
+}
+
+ErrorOr<void> GenericDisplayConnector::flush_first_surface()
+{
+    return Error::from_errno(ENOTSUP);
+}
+
+}