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Kernel/SysFS: Add exposing interface for DisplayConnectors

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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.
This commit is contained in:
Liav A 2022-07-16 08:08:53 +03:00 • committed by Linus Groh
parent cb900006b9
commit da8d18b263
12 changed files with 378 additions and 2 deletions
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4
Kernel/CMakeLists.txt
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@ -156,6 +156,10 @@ set(KERNEL_SOURCES
FileSystem/SysFS/Subsystems/Devices/Storage/DeviceAttribute.cpp
FileSystem/SysFS/Subsystems/Devices/Storage/DeviceDirectory.cpp
FileSystem/SysFS/Subsystems/Devices/Storage/Directory.cpp
FileSystem/SysFS/Subsystems/Devices/Graphics/Directory.cpp
FileSystem/SysFS/Subsystems/Devices/Graphics/DisplayConnector/Directory.cpp
FileSystem/SysFS/Subsystems/Devices/Graphics/DisplayConnector/DeviceDirectory.cpp
FileSystem/SysFS/Subsystems/Devices/Graphics/DisplayConnector/DeviceAttribute.cpp
FileSystem/SysFS/Subsystems/Devices/Directory.cpp
FileSystem/SysFS/Subsystems/Firmware/BIOS/Component.cpp
FileSystem/SysFS/Subsystems/Firmware/BIOS/Directory.cpp