drm/i915: use drm_modeset_lock_all

Two exceptions:
- debugfs files only read information which is not related to crtc, so
  can stay on the modeset_config lock.
- Same holds for the edp vdd work in intel_dp.c. Add a corresponding
  WARN_ON and a comment next to the intel_dp struct fields for
  documentation.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 17aee74258ad..279e9d734ece 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -531,9 +531,9 @@ static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
 
         dev_priv->modeset_on_lid = 0;
 
-        mutex_lock(&dev->mode_config.mutex);
+        drm_modeset_lock_all(dev);
         intel_modeset_setup_hw_state(dev, true);
-        mutex_unlock(&dev->mode_config.mutex);
+        drm_modeset_unlock_all(dev);
 
         return NOTIFY_OK;
 }