[PATCH 06/37] ACPI: VIDEO: Adjust current level to closest available one.

[Len Brown]

From: Alexey Starikovskiy <[EMAIL PROTECTED]>

Signed-off-by: Alexey Starikovskiy <[EMAIL PROTECTED]>
Signed-off-by: Len Brown <[EMAIL PROTECTED]>
---
 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 83aa41c..8a60a3d 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)
-- 
1.5.3.4.206.g58ba4
-
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