[Intel-gfx] [PATCH 1/2] drm/i915: Call intel_dp_mst_resume() before resuming displays

Lyude cpaul at redhat.com
Fri Mar 11 15:57:01 UTC 2016

Since we need MST devices ready before we try to resume displays,
calling this after intel_display_resume() can result in some issues with
various laptop docks where the monitor won't turn back on after
suspending the system.

This order was originally changed in

	commit e7d6f7d70829 ("drm/i915: resume MST after reading back hw state")

In order to fix some unclaimed register errors, however the actual cause
of those has since been fixed.

CC: stable at vger.kernel.org
Signed-off-by: Lyude <cpaul at redhat.com>
 drivers/gpu/drm/i915/i915_drv.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index f357058..08854ae 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -761,12 +761,12 @@ static int i915_drm_resume(struct drm_device *dev)
+	intel_dp_mst_resume(dev);
-	intel_dp_mst_resume(dev);
 	 * ... but also need to make sure that hotplug processing
 	 * doesn't cause havoc. Like in the driver load code we don't

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