From: Aristeu Sergio Rozanski Filho <aris@valeta.org>
To: linux-fbdev-devel@lists.sourceforge.net
Subject: [PATCH] nvidiafb: fix nvidia_bl_get_level_brightness() calc
Date: Mon, 3 Jul 2006 22:39:37 -0300 [thread overview]
Message-ID: <20060704013937.GH27596@cathedrallabs.org> (raw)
nvidiafb: fix nvidia_bl_get_level_brightness() level calc
Signed-off-by: Aristeu S. Rozanski F. <aris@valeta.org>
Index: ppc-2.6/drivers/video/nvidia/nv_backlight.c
===================================================================
--- ppc-2.6.orig/drivers/video/nvidia/nv_backlight.c 2006-07-03 17:38:06.000000000 -0300
+++ ppc-2.6/drivers/video/nvidia/nv_backlight.c 2006-07-03 20:11:08.000000000 -0300
@@ -26,6 +26,7 @@
*/
#define MIN_LEVEL 0x158
#define MAX_LEVEL 0x534
+#define LEVEL_STEP ((MAX_LEVEL - MIN_LEVEL) / FB_BACKLIGHT_MAX)
static struct backlight_properties nvidia_bl_data;
@@ -37,7 +38,7 @@
/* Get and convert the value */
mutex_lock(&info->bl_mutex);
- nlevel = info->bl_curve[level] * FB_BACKLIGHT_MAX / MAX_LEVEL;
+ nlevel = MIN_LEVEL + info->bl_curve[level] * LEVEL_STEP;
mutex_unlock(&info->bl_mutex);
if (nlevel < 0)
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next reply other threads:[~2006-07-04 1:40 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-04 1:39 Aristeu Sergio Rozanski Filho [this message]
2006-07-08 11:51 ` [PATCH] nvidiafb: fix nvidia_bl_get_level_brightness() calc Michael Hanselmann
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