Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux

[cascardo/linux.git] / drivers / gpu / drm / i915 / i915_suspend.c

diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
index 369b3d8..70db618 100644 (file)
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -192,6 +192,7 @@ static void i915_restore_vga(struct drm_device *dev)
 static void i915_save_display(struct drm_device *dev)
 {
        struct drm_i915_private *dev_priv = dev->dev_private;
+       unsigned long flags;
 
        /* Display arbitration control */
        if (INTEL_INFO(dev)->gen <= 4)
@@ -202,6 +203,8 @@ static void i915_save_display(struct drm_device *dev)
        if (!drm_core_check_feature(dev, DRIVER_MODESET))
                i915_save_display_reg(dev);
 
+       spin_lock_irqsave(&dev_priv->backlight.lock, flags);
+
        /* LVDS state */
        if (HAS_PCH_SPLIT(dev)) {
                dev_priv->regfile.savePP_CONTROL = I915_READ(PCH_PP_CONTROL);
@@ -222,6 +225,8 @@ static void i915_save_display(struct drm_device *dev)
                        dev_priv->regfile.saveLVDS = I915_READ(LVDS);
        }
 
+       spin_unlock_irqrestore(&dev_priv->backlight.lock, flags);
+
        if (!IS_I830(dev) && !IS_845G(dev) && !HAS_PCH_SPLIT(dev))
                dev_priv->regfile.savePFIT_CONTROL = I915_READ(PFIT_CONTROL);
 
@@ -257,6 +262,7 @@ static void i915_restore_display(struct drm_device *dev)
 {
        struct drm_i915_private *dev_priv = dev->dev_private;
        u32 mask = 0xffffffff;
+       unsigned long flags;
 
        /* Display arbitration */
        if (INTEL_INFO(dev)->gen <= 4)
@@ -265,6 +271,8 @@ static void i915_restore_display(struct drm_device *dev)
        if (!drm_core_check_feature(dev, DRIVER_MODESET))
                i915_restore_display_reg(dev);
 
+       spin_lock_irqsave(&dev_priv->backlight.lock, flags);
+
        /* LVDS state */
        if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev))
                I915_WRITE(BLC_PWM_CTL2, dev_priv->regfile.saveBLC_PWM_CTL2);
@@ -304,6 +312,8 @@ static void i915_restore_display(struct drm_device *dev)
                I915_WRITE(PP_CONTROL, dev_priv->regfile.savePP_CONTROL);
        }
 
+       spin_unlock_irqrestore(&dev_priv->backlight.lock, flags);
+
        /* only restore FBC info on the platform that supports FBC*/
        intel_disable_fbc(dev);
        if (I915_HAS_FBC(dev)) {