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| author | Matthew Garrett <mjg59@srcf.ucam.org> | 2008-02-05 07:31:24 (GMT) |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-02-07 08:22:57 (GMT) |
| commit | 863c1490e512db40dab61e44b694a493a9e68b3f (patch) | |
| tree | 3abfb2217b1331b3a4dfd917025ef2a87499be03 | |
| parent | 7761f638f6e0f276fe8612ba306d09c40d1b553c (diff) | |
| download | linux-863c1490e512db40dab61e44b694a493a9e68b3f.tar.xz | |
ACPI: video: reset brightness on resume
Some machines seem to need the backlight brightness to be reset on resume.
Add support for doing so to the video module.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
| -rw-r--r-- | drivers/acpi/video.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 74ff0fa..b5e35cd 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -77,6 +77,7 @@ 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); +static int acpi_video_resume(struct acpi_device *device); static const struct acpi_device_id video_device_ids[] = { {ACPI_VIDEO_HID, 0}, @@ -91,6 +92,7 @@ static struct acpi_driver acpi_video_bus = { .ops = { .add = acpi_video_bus_add, .remove = acpi_video_bus_remove, + .resume = acpi_video_resume, }, }; @@ -1837,6 +1839,25 @@ static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data) } static int instance; +static int acpi_video_resume(struct acpi_device *device) +{ + struct acpi_video_bus *video; + struct acpi_video_device *video_device; + int i; + + if (!device || !acpi_driver_data(device)) + return -EINVAL; + + video = acpi_driver_data(device); + + for (i = 0; i < video->attached_count; i++) { + video_device = video->attached_array[i].bind_info; + if (video_device && video_device->backlight) + acpi_video_set_brightness(video_device->backlight); + } + return AE_OK; +} + static int acpi_video_bus_add(struct acpi_device *device) { acpi_status status; |