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authorMauro Carvalho Chehab <mchehab+samsung@kernel.org>2019-06-27 20:56:51 +0300
committerMauro Carvalho Chehab <mchehab+samsung@kernel.org>2019-07-15 17:03:02 +0300
commit4f4cfa6c560c93ba180c30675cf845e1597de44c (patch)
tree0bbe2ec9e6ef62ed2a347504dda50c6bdbe43703 /Documentation/admin-guide/video-output.rst
parentda82c92f1150f66afabf78d2c85ef9ac18dc6d38 (diff)
downloadlinux-4f4cfa6c560c93ba180c30675cf845e1597de44c.tar.xz
docs: admin-guide: add a series of orphaned documents
There are lots of documents that belong to the admin-guide but are on random places (most under Documentation root dir). Move them to the admin guide. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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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
+