Applied.
thanks,
-Len
On Friday 25 January 2008 01:47, Zhang Rui wrote:
> From: Zhang Rui <rui.zhang@xxxxxxxxx>
>
> 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@xxxxxxxxx>
> ---
> drivers/acpi/video.c | 18 +++++++++++++-----
> 1 file changed, 13 insertions(+), 5 deletions(-)
>
> Index: linux-2.6/drivers/acpi/video.c
> ===================================================================
> --- linux-2.6.orig/drivers/acpi/video.c
> +++ linux-2.6/drivers/acpi/video.c
> @@ -72,6 +72,9 @@ MODULE_AUTHOR("Bruno Ducrot");
> MODULE_DESCRIPTION("ACPI Video Driver");
> 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_remove(struct acpi_device *device, int type);
>
> @@ -1850,27 +1853,32 @@ static void acpi_video_device_notify(acp
>
> switch (event) {
> 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);
> keycode = KEY_BRIGHTNESS_CYCLE;
> break;
> 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);
> keycode = KEY_BRIGHTNESSUP;
> break;
> 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);
> keycode = KEY_BRIGHTNESSDOWN;
> break;
> 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);
> keycode = KEY_BRIGHTNESS_ZERO;
> break;
> 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);
> keycode = KEY_DISPLAY_OFF;
> break;
>
>
-
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