Commit | Line | Data |
---|---|---|
cf566e1e MCC |
1 | Video Output Switcher Control |
2 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
b03637b8 | 3 | |
cf566e1e | 4 | 2006 luming.yu@intel.com |
b03637b8 YL |
5 | |
6 | The output sysfs class driver provides an abstract video output layer that | |
7 | can be used to hook platform specific methods to enable/disable video output | |
8 | device through common sysfs interface. For example, on my IBM ThinkPad T42 | |
9 | laptop, The ACPI video driver registered its output devices and read/write | |
cf566e1e | 10 | method for 'state' with output sysfs class. The user interface under sysfs is:: |
b03637b8 | 11 | |
cf566e1e MCC |
12 | linux:/sys/class/video_output # tree . |
13 | . | |
14 | |-- CRT0 | |
15 | | |-- device -> ../../../devices/pci0000:00/0000:00:01.0 | |
16 | | |-- state | |
17 | | |-- subsystem -> ../../../class/video_output | |
18 | | `-- uevent | |
19 | |-- DVI0 | |
20 | | |-- device -> ../../../devices/pci0000:00/0000:00:01.0 | |
21 | | |-- state | |
22 | | |-- subsystem -> ../../../class/video_output | |
23 | | `-- uevent | |
24 | |-- LCD0 | |
25 | | |-- device -> ../../../devices/pci0000:00/0000:00:01.0 | |
26 | | |-- state | |
27 | | |-- subsystem -> ../../../class/video_output | |
28 | | `-- uevent | |
29 | `-- TV0 | |
30 | |-- device -> ../../../devices/pci0000:00/0000:00:01.0 | |
31 | |-- state | |
32 | |-- subsystem -> ../../../class/video_output | |
33 | `-- uevent | |
b03637b8 | 34 |