Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit b03637b8 authored by Yu Luming's avatar Yu Luming Committed by Len Brown
Browse files

output: Add output class document 



Signed-off-by: default avatarLuming Yu <Luming.yu@intel.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 2dec3ba8

Documentation/video-output.txt

0 → 100644
+34 −0
Original line number Diff line number Diff line 


		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