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authorAlexey Starikovskiy <astarikovskiy@suse.de>2007-09-03 16:30:08 +0400
committerLen Brown <len.brown@intel.com>2007-09-05 14:24:35 -0400
commit63f0edfc0b7f8058f9d3f9b572615ec97ae011ba (patch)
treef5bb35a540e9550649bb8633576acf242b1fa866 /drivers/acpi/video.c
parent4500ca8e221e72cc38e7c239b9b1a041031ee450 (diff)
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.c13
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)