1 files changed, 20 insertions, 5 deletions

diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 089f18c66ddb..05598ae10c4b 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -664,6 +664,15 @@ static int intel_lvds_get_modes(struct drm_connector *connector)
         return 0;
 }
 
+/*
+ * Lid events. Note the use of 'modeset_on_lid':
+ *  - we set it on lid close, and reset it on open
+ *  - we use it as a "only once" bit (ie we ignore
+ *    duplicate events where it was already properly
+ *    set/reset)
+ *  - the suspend/resume paths will also set it to
+ *    zero, since they restore the mode ("lid open").
+ */
 static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
                             void *unused)
 {
@@ -671,13 +680,19 @@ static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
                 container_of(nb, struct drm_i915_private, lid_notifier);
         struct drm_device *dev = dev_priv->dev;
 
-        if (acpi_lid_open() && !dev_priv->suspended) {
-                mutex_lock(&dev->mode_config.mutex);
-                drm_helper_resume_force_mode(dev);
-                mutex_unlock(&dev->mode_config.mutex);
+        if (!acpi_lid_open()) {
+                dev_priv->modeset_on_lid = 1;
+                return NOTIFY_OK;
         }
 
-        drm_sysfs_hotplug_event(dev_priv->dev);
+        if (!dev_priv->modeset_on_lid)
+                return NOTIFY_OK;
+
+        dev_priv->modeset_on_lid = 0;
+
+        mutex_lock(&dev->mode_config.mutex);
+        drm_helper_resume_force_mode(dev);
+        mutex_unlock(&dev->mode_config.mutex);
 
         return NOTIFY_OK;
 }