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- Video Output Switcher Control
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- 2006 luming.yu@intel.com
- The output sysfs class driver provides an abstract video output layer that
- can be used to hook platform specific methods to enable/disable video output
- device through common sysfs interface. For example, on my IBM ThinkPad T42
- laptop, The ACPI video driver registered its output devices and read/write
- method for 'state' with output sysfs class. The user interface under sysfs is:
- linux:/sys/class/video_output # tree .
- .
- |-- CRT0
- | |-- device -> ../../../devices/pci0000:00/0000:00:01.0
- | |-- state
- | |-- subsystem -> ../../../class/video_output
- | `-- uevent
- |-- DVI0
- | |-- device -> ../../../devices/pci0000:00/0000:00:01.0
- | |-- state
- | |-- subsystem -> ../../../class/video_output
- | `-- uevent
- |-- LCD0
- | |-- device -> ../../../devices/pci0000:00/0000:00:01.0
- | |-- state
- | |-- subsystem -> ../../../class/video_output
- | `-- uevent
- `-- TV0
- |-- device -> ../../../devices/pci0000:00/0000:00:01.0
- |-- state
- |-- subsystem -> ../../../class/video_output
- `-- uevent
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