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| author | Alexey Starikovskiy <astarikovskiy@suse.de> | 2007-09-03 16:30:08 +0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-09-05 14:24:35 -0400 |
| commit | 63f0edfc0b7f8058f9d3f9b572615ec97ae011ba (patch) | |
| tree | f5bb35a540e9550649bb8633576acf242b1fa866 /drivers/acpi/video.c | |
| parent | 4500ca8e221e72cc38e7c239b9b1a041031ee450 (diff) | |
| download | lwn-63f0edfc0b7f8058f9d3f9b572615ec97ae011ba.tar.gz lwn-63f0edfc0b7f8058f9d3f9b572615ec97ae011ba.zip | |
ACPI: VIDEO: Adjust current level to closest available one.
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/video.c')
| -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) |