diff options
| -rw-r--r-- | drivers/acpi/video.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 83aa41c5c59f..8a60a3d7001c 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -1636,9 +1636,20 @@ static int acpi_video_get_next_level(struct acpi_video_device *device, u32 level_current, u32 event) { - int min, max, min_above, max_below, i, l; + int min, max, min_above, max_below, i, l, delta = 255; max = max_below = 0; min = min_above = 255; + /* Find closest level to level_current */ + for (i = 0; i < device->brightness->count; i++) { + l = device->brightness->levels[i]; + if (abs(l - level_current) < abs(delta)) { + delta = l - level_current; + if (!delta) + break; + } + } + /* Ajust level_current to closest available level */ + level_current += delta; for (i = 0; i < device->brightness->count; i++) { l = device->brightness->levels[i]; if (l < min) |