Kernel/SysFS: Add exposing interface for DisplayConnectors
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.
2022-07-16 08:08:53 +03:00
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/*
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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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#include <Kernel/FileSystem/SysFS/Subsystems/Devices/Graphics/Directory.h>
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#include <Kernel/FileSystem/SysFS/Subsystems/Devices/Graphics/DisplayConnector/Directory.h>
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#include <Kernel/Sections.h>
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namespace Kernel {
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2022-08-19 20:53:40 +02:00
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UNMAP_AFTER_INIT NonnullLockRefPtr<SysFSGraphicsDirectory> SysFSGraphicsDirectory::must_create(SysFSDevicesDirectory const& parent_directory)
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Kernel/SysFS: Add exposing interface for DisplayConnectors
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.
2022-07-16 08:08:53 +03:00
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{
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2022-08-19 20:53:40 +02:00
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auto directory = adopt_lock_ref(*new (nothrow) SysFSGraphicsDirectory(parent_directory));
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Kernel/SysFS: Add exposing interface for DisplayConnectors
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.
2022-07-16 08:08:53 +03:00
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MUST(directory->m_child_components.with([&](auto& list) -> ErrorOr<void> {
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list.append(SysFSDisplayConnectorsDirectory::must_create(*directory));
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return {};
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}));
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return directory;
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}
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UNMAP_AFTER_INIT SysFSGraphicsDirectory::SysFSGraphicsDirectory(SysFSDevicesDirectory const& parent_directory)
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: SysFSDirectory(parent_directory)
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{
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}
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}
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