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Diffstat (limited to 'Documentation/power/video_extension.txt')
| -rw-r--r-- | Documentation/power/video_extension.txt | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/Documentation/power/video_extension.txt b/Documentation/power/video_extension.txt index 8e33d7c82c49..b2f9b1598ac2 100644 --- a/Documentation/power/video_extension.txt +++ b/Documentation/power/video_extension.txt @@ -1,13 +1,16 @@ -This driver implement the ACPI Extensions For Display Adapters -for integrated graphics devices on motherboard, as specified in -ACPI 2.0 Specification, Appendix B, allowing to perform some basic -control like defining the video POST device, retrieving EDID information -or to setup a video output, etc. Note that this is an ref. implementation only. -It may or may not work for your integrated video device. +ACPI video extensions +~~~~~~~~~~~~~~~~~~~~~ + +This driver implement the ACPI Extensions For Display Adapters for +integrated graphics devices on motherboard, as specified in ACPI 2.0 +Specification, Appendix B, allowing to perform some basic control like +defining the video POST device, retrieving EDID information or to +setup a video output, etc. Note that this is an ref. implementation +only. It may or may not work for your integrated video device. Interfaces exposed to userland through /proc/acpi/video: -VGA/info : display the supported video bus device capability like ,Video ROM, CRT/LCD/TV. +VGA/info : display the supported video bus device capability like Video ROM, CRT/LCD/TV. VGA/ROM : Used to get a copy of the display devices' ROM data (up to 4k). VGA/POST_info : Used to determine what options are implemented. VGA/POST : Used to get/set POST device. @@ -15,7 +18,7 @@ VGA/DOS : Used to get/set ownership of output switching: Please refer ACPI spec B.4.1 _DOS VGA/CRT : CRT output VGA/LCD : LCD output -VGA/TV : TV output +VGA/TVO : TV output VGA/*/brightness : Used to get/set brightness of output device Notify event through /proc/acpi/event: |