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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
-