diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_suspend.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_suspend.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c index 369b3d8776a..70db618989c 100644 --- 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)) { |