UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

ACPI: video: create "brightness_switch_enabled" modparam 

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>
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/acpi/video.c
View File

@ -72,6 +72,9 @@ MODULE_AUTHOR("Bruno Ducrot");
MODULE_DESCRIPTION("ACPI Video Driver"); MODULE_DESCRIPTION("ACPI Video Driver");
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");
static int brightness_switch_enabled = 1;
module_param(brightness_switch_enabled, bool, 0644);
static int acpi_video_bus_add(struct acpi_device *device); static int acpi_video_bus_add(struct acpi_device *device);
static int acpi_video_bus_remove(struct acpi_device *device, int type); static int acpi_video_bus_remove(struct acpi_device *device, int type);
@ -1850,27 +1853,32 @@ static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
switch (event) { switch (event) {
case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */ case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS: /* Cycle brightness */
acpi_video_switch_brightness(video_device, event); if (brightness_switch_enabled)
acpi_video_switch_brightness(video_device, event);
acpi_bus_generate_proc_event(device, event, 0); acpi_bus_generate_proc_event(device, event, 0);
keycode = KEY_BRIGHTNESS_CYCLE; keycode = KEY_BRIGHTNESS_CYCLE;
break; break;
case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */ case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS: /* Increase brightness */
acpi_video_switch_brightness(video_device, event); if (brightness_switch_enabled)
acpi_video_switch_brightness(video_device, event);
acpi_bus_generate_proc_event(device, event, 0); acpi_bus_generate_proc_event(device, event, 0);
keycode = KEY_BRIGHTNESSUP; keycode = KEY_BRIGHTNESSUP;
break; break;
case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */ case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS: /* Decrease brightness */
acpi_video_switch_brightness(video_device, event); if (brightness_switch_enabled)
acpi_video_switch_brightness(video_device, event);
acpi_bus_generate_proc_event(device, event, 0); acpi_bus_generate_proc_event(device, event, 0);
keycode = KEY_BRIGHTNESSDOWN; keycode = KEY_BRIGHTNESSDOWN;
break; break;
case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */ case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
acpi_video_switch_brightness(video_device, event); if (brightness_switch_enabled)
acpi_video_switch_brightness(video_device, event);
acpi_bus_generate_proc_event(device, event, 0); acpi_bus_generate_proc_event(device, event, 0);
keycode = KEY_BRIGHTNESS_ZERO; keycode = KEY_BRIGHTNESS_ZERO;
break; break;
case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */ case ACPI_VIDEO_NOTIFY_DISPLAY_OFF: /* display device off */
acpi_video_switch_brightness(video_device, event); if (brightness_switch_enabled)
acpi_video_switch_brightness(video_device, event);
acpi_bus_generate_proc_event(device, event, 0); acpi_bus_generate_proc_event(device, event, 0);
keycode = KEY_DISPLAY_OFF; keycode = KEY_DISPLAY_OFF;
break; break;