diff options
Diffstat (limited to 'drivers/acpi/video.c')
| -rw-r--r-- | drivers/acpi/video.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 5a98e1db68c0..015b93df5201 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -1146,6 +1146,23 @@ acpi_video_device_bind(struct acpi_video_bus *video, } } +static bool acpi_video_device_in_dod(struct acpi_video_device *device) +{ + struct acpi_video_bus *video = device->video; + int i; + + /* If we have a broken _DOD, no need to test */ + if (!video->attached_count) + return true; + + for (i = 0; i < video->attached_count; i++) { + if (video->attached_array[i].bind_info == device) + return true; + } + + return false; +} + /* * Arg: * video : video bus device @@ -1585,6 +1602,15 @@ static void acpi_video_dev_register_backlight(struct acpi_video_device *device) static int count; char *name; + /* + * Do not create backlight device for video output + * device that is not in the enumerated list. + */ + if (!acpi_video_device_in_dod(device)) { + dev_dbg(&device->dev->dev, "not in _DOD list, ignore\n"); + return; + } + result = acpi_video_init_brightness(device); if (result) return; |