[Intel-gfx] [PATCH] drm/i915: Drain freed object after suspend display

["José Roberto de Souza" <jose.souza@intel.com>]

Display is turned off by i915_drm_suspend() during the suspend
procedure, removing the last reference of some gem objects that were
used by display.

The issue is that those objects are only actually freed when
mm.free_work executed and that can happen very late in the suspend
process causing issues.
So here draining all freed objects released by display fixing suspend
issues.

Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
---
 drivers/gpu/drm/i915/i915_driver.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
index 6e5849c1086f6..aa2a5ea30c7bb 100644
--- a/drivers/gpu/drm/i915/i915_driver.c
+++ b/drivers/gpu/drm/i915/i915_driver.c
@@ -1186,6 +1186,8 @@ static int i915_drm_suspend(struct drm_device *dev)
 
 	enable_rpm_wakeref_asserts(&dev_priv->runtime_pm);
 
+	i915_gem_drain_freed_objects(dev_priv);
+
 	return 0;
 }
 
-- 
2.37.0