The patch below does not apply to the 4.5-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 1e8817b7f603464369b3f70895946254bf62ba8e Mon Sep 17 00:00:00 2001
From: Lyude <cpaul@xxxxxxxxxx>
Date: Fri, 11 Mar 2016 10:57:01 -0500
Subject: [PATCH] drm/i915: Call intel_dp_mst_resume() before resuming displays
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>
[danvet: Resolve conflicts with locking changes.]
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
(cherry picked from commit a16b7658f4e0d4aec9bc3e75a5f0cc3f7a3a0422)
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 20e82008b8b6..30798cbc6fc0 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -758,10 +758,10 @@ static int i915_drm_resume(struct drm_device *dev)
dev_priv->display.hpd_irq_setup(dev);
spin_unlock_irq(&dev_priv->irq_lock);
- intel_display_resume(dev);
-
intel_dp_mst_resume(dev);
+ intel_display_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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