diff options
Diffstat (limited to 'Documentation/power')
-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 @@ | |||
1 | This driver implement the ACPI Extensions For Display Adapters | 1 | ACPI video extensions |
2 | for integrated graphics devices on motherboard, as specified in | 2 | ~~~~~~~~~~~~~~~~~~~~~ |
3 | ACPI 2.0 Specification, Appendix B, allowing to perform some basic | 3 | |
4 | control like defining the video POST device, retrieving EDID information | 4 | This driver implement the ACPI Extensions For Display Adapters for |
5 | or to setup a video output, etc. Note that this is an ref. implementation only. | 5 | integrated graphics devices on motherboard, as specified in ACPI 2.0 |
6 | It may or may not work for your integrated video device. | 6 | Specification, Appendix B, allowing to perform some basic control like |
7 | defining the video POST device, retrieving EDID information or to | ||
8 | setup a video output, etc. Note that this is an ref. implementation | ||
9 | only. It may or may not work for your integrated video device. | ||
7 | 10 | ||
8 | Interfaces exposed to userland through /proc/acpi/video: | 11 | Interfaces exposed to userland through /proc/acpi/video: |
9 | 12 | ||
10 | VGA/info : display the supported video bus device capability like ,Video ROM, CRT/LCD/TV. | 13 | VGA/info : display the supported video bus device capability like Video ROM, CRT/LCD/TV. |
11 | VGA/ROM : Used to get a copy of the display devices' ROM data (up to 4k). | 14 | VGA/ROM : Used to get a copy of the display devices' ROM data (up to 4k). |
12 | VGA/POST_info : Used to determine what options are implemented. | 15 | VGA/POST_info : Used to determine what options are implemented. |
13 | VGA/POST : Used to get/set POST device. | 16 | VGA/POST : Used to get/set POST device. |
@@ -15,7 +18,7 @@ VGA/DOS : Used to get/set ownership of output switching: | |||
15 | Please refer ACPI spec B.4.1 _DOS | 18 | Please refer ACPI spec B.4.1 _DOS |
16 | VGA/CRT : CRT output | 19 | VGA/CRT : CRT output |
17 | VGA/LCD : LCD output | 20 | VGA/LCD : LCD output |
18 | VGA/TV : TV output | 21 | VGA/TVO : TV output |
19 | VGA/*/brightness : Used to get/set brightness of output device | 22 | VGA/*/brightness : Used to get/set brightness of output device |
20 | 23 | ||
21 | Notify event through /proc/acpi/event: | 24 | Notify event through /proc/acpi/event: |