drm/i915: don't suspend gt until after we disable irqs and display (v2)

When I moved the irq disable down to after display disable,
I didn't realise the gt suspend also required irqs off, so move it
down as well.

Fixes WARNs seen at suspend/resume time.

v2: moved the rps flush down as well.

Tested-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/i915/i915_drv.c

@@ -516,11 +516,6 @@ static int i915_drm_freeze(struct drm_device *dev)
 			return error;
 		}
 
-		flush_delayed_work(&dev_priv->rps.delayed_resume_work);
-
-
-		intel_suspend_gt_powersave(dev);
-
 		/*
 		 * Disable CRTCs directly since we want to preserve sw state
 		 * for _thaw.
@@ -532,8 +527,13 @@ static int i915_drm_freeze(struct drm_device *dev)
 		drm_modeset_unlock_all(dev);
 
 		intel_dp_mst_suspend(dev);
+
+		flush_delayed_work(&dev_priv->rps.delayed_resume_work);
+
 		intel_runtime_pm_disable_interrupts(dev);
 
+		intel_suspend_gt_powersave(dev);
+
 		intel_modeset_suspend_hw(dev);
 	}