ACPI: video: create "brightness_switch_enabled" modparam

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Introduce new module parameter for brightness control.
"brightness_switch_enabled" is set by default which means
nothing changes upon brightness switch events.

When "brightness_switch_enabled" is cleared via
"echo 0 > /sys/module/video/parameters/brightness_switch_enabled",
ACPI will not try to change the brightness level any more.

Either X will take charge of this or users can change the brightness level
by poking /sys/class/backlight/acpi_videoX/...

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

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This commit is contained in:

Zhang Rui 2008-01-25 14:47:49 +08:00 • committed by Len Brown

parent 488b5ec871

commit 8a681a4dee

1 changed files with 13 additions and 5 deletions

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drivers/acpi/video.c

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