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https://github.com/RGBCube/serenity
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da8d18b263
Under normal conditions (when mounting SysFS in /sys), there will be a new directory in the /sys/devices directory called "graphics". For now, under that directory there will be only a sub-directory called "connectors" which will contain all DisplayConnectors' details, each in its own sub-directory too, distinguished in naming with its minor number. Therefore, /sys/devices/graphics/connectors/MINOR_NUMBER/ will contain: - General device attributes such as mutable_mode_setting_capable, double_buffering_capable, flush_support, partial_flush_support and refresh_rate_support. These values are exposed in the ioctl interface of the DisplayConnector class too, but these can be useful later on for command line utilities that want/need to expose these basic settings. - The EDID blob, simply named "edid". This will help userspace to fetch the edid without the need of using the ioctl interface later on.
42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
/*
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* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <Kernel/FileSystem/SysFS/Component.h>
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#include <Kernel/FileSystem/SysFS/Subsystems/Devices/Graphics/DisplayConnector/DeviceDirectory.h>
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#include <Kernel/Graphics/DisplayConnector.h>
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#include <Kernel/KBuffer.h>
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namespace Kernel {
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class DisplayConnectorAttributeSysFSComponent : public SysFSComponent {
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public:
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enum class Type {
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MutableModeSettingCapable,
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DoubleFrameBufferingCapable,
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FlushSupport,
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PartialFlushSupport,
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RefreshRateSupport,
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EDID,
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};
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public:
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static NonnullRefPtr<DisplayConnectorAttributeSysFSComponent> must_create(DisplayConnectorSysFSDirectory const& device_directory, Type);
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virtual ErrorOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const override;
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virtual ~DisplayConnectorAttributeSysFSComponent() {};
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virtual StringView name() const override;
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protected:
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ErrorOr<NonnullOwnPtr<KBuffer>> try_to_generate_buffer() const;
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DisplayConnectorAttributeSysFSComponent(DisplayConnectorSysFSDirectory const& device, Type);
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NonnullRefPtr<DisplayConnector> m_device;
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Type const m_type { Type::MutableModeSettingCapable };
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};
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}
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