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serenity/Kernel/Graphics/VirtIOGPU/DisplayConnector.h
Liav A 883b0f1390 Kernel/Graphics: Restore VirtIO GPU framebuffer console functionality
This has been done in multiple ways:
- Each time we modeset the resolution via the VirtIOGPU DisplayConnector
  we ensure that the framebuffer is updated with the new resolution.
- Each time the cursor is updated we ensure that the framebuffer console
  is marked dirty so the IO Work Queue task which is scheduled to check
  if it is dirty, will flush the surface.
- We only initialize a framebuffer console after we ensure that at the
  very least a DisplayConnector has being set with a known resolution.
- We only call GenericFramebufferConsole::enable() when enabling the
  console after the important variables of the console (m_width, m_pitch
  and m_height) have been set.
2022-12-31 05:13:21 -07:00

93 lines
3.5 KiB
C++

/*
* Copyright (c) 2021, Sahan Fernando <sahan.h.fernando@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/BinaryBufferWriter.h>
#include <AK/DistinctNumeric.h>
#include <Kernel/Devices/CharacterDevice.h>
#include <Kernel/Graphics/Console/Console.h>
#include <Kernel/Graphics/DisplayConnector.h>
#include <Kernel/Graphics/VirtIOGPU/GraphicsAdapter.h>
#include <Kernel/Graphics/VirtIOGPU/Protocol.h>
#include <Kernel/Memory/Region.h>
#include <LibEDID/EDID.h>
namespace Kernel::Graphics::VirtIOGPU {
class Console;
}
namespace Kernel {
class VirtIOGraphicsAdapter;
class VirtIODisplayConnector final : public DisplayConnector {
friend class Graphics::VirtIOGPU::Console;
friend class DeviceManagement;
public:
static NonnullLockRefPtr<VirtIODisplayConnector> must_create(VirtIOGraphicsAdapter& graphics_adapter, Graphics::VirtIOGPU::ScanoutID scanout_id);
void set_edid_bytes(Badge<VirtIOGraphicsAdapter>, Array<u8, 128> const& edid_bytes);
void set_safe_mode_setting_after_initialization(Badge<VirtIOGraphicsAdapter>);
Graphics::VirtIOGPU::ScanoutID scanout_id() const { return m_scanout_id; }
Graphics::VirtIOGPU::Protocol::DisplayInfoResponse::Display display_information(Badge<VirtIOGraphicsAdapter>) const;
void draw_ntsc_test_pattern(Badge<VirtIOGraphicsAdapter>);
void initialize_console(Badge<VirtIOGraphicsAdapter>);
private:
virtual bool mutable_mode_setting_capable() const override { return true; }
virtual bool double_framebuffering_capable() const override { return false; }
virtual bool partial_flush_support() const override { return true; }
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;
// Note: VirtIO hardware requires a constant refresh to keep the screen in sync to the user.
virtual bool flush_support() const override { return true; }
// Note: Paravirtualized hardware doesn't require a defined refresh rate for modesetting.
virtual bool refresh_rate_support() const override { return false; }
virtual ErrorOr<void> flush_first_surface() override;
virtual ErrorOr<void> flush_rectangle(size_t buffer_index, FBRect const& rect) override;
virtual void enable_console() override;
virtual void disable_console() override;
static bool is_valid_buffer_index(size_t buffer_index)
{
return buffer_index == 0 || buffer_index == 1;
}
private:
VirtIODisplayConnector(VirtIOGraphicsAdapter& graphics_adapter, Graphics::VirtIOGPU::ScanoutID scanout_id);
ErrorOr<void> flush_displayed_image(Graphics::VirtIOGPU::Protocol::Rect const& dirty_rect, bool main_buffer);
void set_dirty_displayed_rect(Graphics::VirtIOGPU::Protocol::Rect const& dirty_rect, bool main_buffer);
void query_display_information();
ErrorOr<void> query_edid_from_virtio_adapter();
void query_display_edid();
void clear_to_black();
// Member data
// Context used for kernel operations (e.g. flushing resources to scanout)
Graphics::VirtIOGPU::ContextID m_kernel_context_id;
NonnullLockRefPtr<VirtIOGraphicsAdapter> m_graphics_adapter;
LockRefPtr<Graphics::VirtIOGPU::Console> m_console;
Graphics::VirtIOGPU::Protocol::DisplayInfoResponse::Display m_display_info {};
Graphics::VirtIOGPU::ScanoutID m_scanout_id;
constexpr static size_t NUM_TRANSFER_REGION_PAGES = 256;
};
}