[Intel-gfx] [PATCH 1/6] drm/i915: don't restore LVDS enable state blindly

[Jesse Barnes]

We still rely on a few LVDS bits, but restoring the enable bit can cause
trouble at this point, so don't.

Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
---
 drivers/gpu/drm/i915/i915_suspend.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
index 2135f21..a81abed 100644
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -268,9 +268,9 @@ static void i915_restore_display(struct drm_device *dev)
 		I915_WRITE(BLC_PWM_CTL2, dev_priv->regfile.saveBLC_PWM_CTL2);
 
 	if (HAS_PCH_SPLIT(dev)) {
-		I915_WRITE(PCH_LVDS, dev_priv->regfile.saveLVDS);
+		I915_WRITE(PCH_LVDS, dev_priv->regfile.saveLVDS & 0x7fffffff);
 	} else if (IS_MOBILE(dev) && !IS_I830(dev))
-		I915_WRITE(LVDS, dev_priv->regfile.saveLVDS);
+		I915_WRITE(LVDS, dev_priv->regfile.saveLVDS & 0x7fffffff);
 
 	if (!IS_I830(dev) && !IS_845G(dev) && !HAS_PCH_SPLIT(dev))
 		I915_WRITE(PFIT_CONTROL, dev_priv->regfile.savePFIT_CONTROL);
-- 
1.7.9.5