Hi, On Sat, 2006-11-04 at 21:22 +0800, Yu Luming wrote: > diff --git a/Documentation/video-output.txt b/Documentation/video-output.txt > new file mode 100644 > index 0000000..71b1dba > --- /dev/null > +++ b/Documentation/video-output.txt > @@ -0,0 +1,34 @@ > + > + Video Output Switcher Control > + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > + 2006 luming.yu@xxxxxxxxx > + > +The output sysfs class driver is to provide video output abstract 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 > +aptop, acpi video driver registered its output devices and read/write method > +for state with output sysfs class. The user interface under sysfs is : Rephrased, s/Thinkpad/ThinkPad, s/aptop/laptop, s/acpi/ACPI, kill whitespace in front of colon: 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 devices through a common sysfs interface. For example, on my IBM ThinkPad T42 laptop, the ACPI video driver registers its output devices and read/write methods for 'state' with output sysfs class. The user interface under sysfs is: The last but one sentence still sounds bogus to me, maybe someone else has an idea. > +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 > + Thanks, Timo - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
