[PATCH 4/7] drm/i915: only disable enabled planes on intel_fb_restore_mode

[Paulo Zanoni <przanoni@gmail.com>]

From: Paulo Zanoni <paulo.r.zanoni@intel.com>

We should avoid touching registers that are on the power down well
when we don't need to, because if we touch these registers when the
power well is disabled we'll get tons of "unclaimed register"
messages. This commit fixes some of these messages.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/intel_fb.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_fb.c b/drivers/gpu/drm/i915/intel_fb.c
index ce5f544..6591029 100644
--- a/drivers/gpu/drm/i915/intel_fb.c
+++ b/drivers/gpu/drm/i915/intel_fb.c
@@ -304,7 +304,8 @@ void intel_fb_restore_mode(struct drm_device *dev)
 
 	/* Be sure to shut off any planes that may be active */
 	list_for_each_entry(plane, &config->plane_list, head)
-		plane->funcs->disable_plane(plane);
+		if (plane->enabled)
+			plane->funcs->disable_plane(plane);
 
 	mutex_unlock(&dev->mode_config.mutex);
 }
-- 
1.7.10.4