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

From: Lyude
Date: Fri Mar 11 2016 - 10:58:04 EST

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@xxxxxxxxxxxxxxx
Signed-off-by: Lyude <cpaul@xxxxxxxxxx>
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