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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
| commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
| tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/admin-guide/video-output.rst | |
| parent | Initial commit. (diff) | |
| download | linux-upstream/5.10.209.tar.xz linux-upstream/5.10.209.zip | |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/admin-guide/video-output.rst')
| -rw-r--r-- | Documentation/admin-guide/video-output.rst | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/Documentation/admin-guide/video-output.rst b/Documentation/admin-guide/video-output.rst new file mode 100644 index 000000000..56d6fa2e2 --- /dev/null +++ b/Documentation/admin-guide/video-output.rst @@ -0,0 +1,34 @@ +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 + |