tree 7f43f096589e6900fb11db0033d3e68086d7c475
parent 21bd770b9c90ee6a53a9dbb6293513a8c7654cfe
author Jesse Barnes <jbarnes@virtuousgeek.org> 1263502082 +0000
committer Eric Anholt <eric@anholt.net> 1263593281 -0800

drm/i915: disable LVDS downclock by default

Many platform support this feature, and it can provide significant
power savings when the reduced refresh rate is low.  However, on some
platforms a secondary (reduced) timing is provided but not actually
supported by the hardware.  This results in undesirable flicker at
runtime.

So disable the feature by default, but allow users to opt-in to the
reduced clock behavior with a new module parameter, lvds_downclock,
that can be set to 1 to enable the feature.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>