[Intel-xe] [PATCH 3/4] drm/i915/display: Move releasing gem object away from fb tracking

[Jouni Högander]

As a preparation for Xe we want to remove all i915_gem_object details away
from frontbuffer tacking code. Due to this move releasing gem object
reference to i915_gem_object_set_frontbuffer.

Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231012072158.4115795-2-jouni.hogander@intel.com
(cherry picked from commit 501069dad5214fafe1b8ba38fa26a5d07df784c3)
---
 drivers/gpu/drm/i915/display/intel_frontbuffer.c       | 2 --
 drivers/gpu/drm/i915/gem/i915_gem_object_frontbuffer.h | 1 +
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_frontbuffer.c b/drivers/gpu/drm/i915/display/intel_frontbuffer.c
index 3e77dac6bebe..d64ce5bfeca8 100644
--- a/drivers/gpu/drm/i915/display/intel_frontbuffer.c
+++ b/drivers/gpu/drm/i915/display/intel_frontbuffer.c
@@ -264,8 +264,6 @@ static void frontbuffer_release(struct kref *ref)
 	spin_unlock(&intel_bo_to_i915(obj)->display.fb_tracking.lock);
 
 	i915_active_fini(&front->write);
-
-	i915_gem_object_put(obj);
 	kfree_rcu(front, rcu);
 }
 
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_frontbuffer.h b/drivers/gpu/drm/i915/gem/i915_gem_object_frontbuffer.h
index e5e870b6f186..9fbf14867a2a 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object_frontbuffer.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object_frontbuffer.h
@@ -89,6 +89,7 @@ i915_gem_object_set_frontbuffer(struct drm_i915_gem_object *obj,
 
 	if (!front) {
 		RCU_INIT_POINTER(obj->frontbuffer, NULL);
+		drm_gem_object_put(intel_bo_to_drm_bo(obj));
 	} else if (rcu_access_pointer(obj->frontbuffer)) {
 		cur = rcu_dereference_protected(obj->frontbuffer, true);
 		kref_get(&cur->ref);
-- 
2.34.1