drm/i915: Drain freed object after suspend display

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>
Reviewed-by: Matt Atwood <matthew.s.atwood@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220629134721.48375-1-jose.souza@intel.com

diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
index 2bd45e51d3b0204f8b3e34f2b9cf7ac5b4f35c02..a67f20710978e21b4a4d7fc92eafb8218fdb2bad 100644 (file)
--- a/drivers/gpu/drm/i915/i915_driver.c
+++ b/drivers/gpu/drm/i915/i915_driver.c
@@ -1163,6 +1163,8 @@ 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;
 }