diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_lvds.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c index 3deb58e2f394..4c8553ea82f7 100644 --- a/drivers/gpu/drm/i915/intel_lvds.c +++ b/drivers/gpu/drm/i915/intel_lvds.c @@ -447,9 +447,19 @@ static int intel_lid_notify(struct notifier_block *nb, unsigned long val, if (dev_priv->modeset_restore == MODESET_DONE) goto exit; - drm_modeset_lock_all(dev); - intel_modeset_setup_hw_state(dev, true); - drm_modeset_unlock_all(dev); + /* + * Some old platform's BIOS love to wreak havoc while the lid is closed. + * We try to detect this here and undo any damage. The split for PCH + * platforms is rather conservative and a bit arbitrary expect that on + * those platforms VGA disabling requires actual legacy VGA I/O access, + * and as part of the cleanup in the hw state restore we also redisable + * the vga plane. + */ + if (!HAS_PCH_SPLIT(dev)) { + drm_modeset_lock_all(dev); + intel_modeset_setup_hw_state(dev, true); + drm_modeset_unlock_all(dev); + } dev_priv->modeset_restore = MODESET_DONE; |