drm/i915: Avoid using mappable space for relocation processing through the CPU

[mirror_ubuntu-artful-kernel.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 9f6ba8fab088d20130cf72930be8c9736c440642..da449991e8ae0c3c72a709c9820858725477c83d 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -967,14 +967,19 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
        i8k.restricted  [HW] Allow controlling fans only if SYS_ADMIN
                        capability is set.
 
-       i915.invert_brightness
+       i915.invert_brightness=
                        [DRM] Invert the sense of the variable that is used to
                        set the brightness of the panel backlight. Normally a
-                       value of 0 indicates backlight switched off, and the
-                       maximum value sets the backlight to maximum brightness.
-                       If this parameter is specified, a value of 0 sets the
-                       backlight to maximum brightness, and the maximum value
-                       switches the backlight off.
+                       brightness value of 0 indicates backlight switched off,
+                       and the maximum of the brightness value sets the backlight
+                       to maximum brightness. If this parameter is set to 0
+                       (default) and the machine requires it, or this parameter
+                       is set to 1, a brightness value of 0 sets the backlight
+                       to maximum brightness, and the maximum of the brightness
+                       value switches the backlight off.
+                       -1 -- never invert brightness
+                        0 -- machine default
+                        1 -- force brightness inversion
 
        icn=            [HW,ISDN]
                        Format: <io>[,<membase>[,<icn_id>[,<icn_id2>]]]