1 files changed, 70 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2461-amdgpu-dc-use-kref-for-dc_plane_state.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2461-amdgpu-dc-use-kref-for-dc_plane_state.patch
new file mode 100644
index 00000000..26346812
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/2461-amdgpu-dc-use-kref-for-dc_plane_state.patch
@@ -0,0 +1,70 @@
+From 9ae049162e974b059ae8d4e01bef889b02be9336 Mon Sep 17 00:00:00 2001
+From: Dave Airlie <airlied@redhat.com>
+Date: Tue, 3 Oct 2017 12:38:59 +1000
+Subject: [PATCH 2461/4131] amdgpu/dc: use kref for dc_plane_state.
+
+Signed-off-by: Dave Airlie <airlied@redhat.com>
+---
+ drivers/gpu/drm/amd/display/dc/core/dc_surface.c | 20 ++++++++++----------
+ drivers/gpu/drm/amd/display/dc/dc.h              |  2 +-
+ 2 files changed, 11 insertions(+), 11 deletions(-)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_surface.c b/drivers/gpu/drm/amd/display/dc/core/dc_surface.c
+index 0950075..d43783a 100644
+--- a/drivers/gpu/drm/amd/display/dc/core/dc_surface.c
++++ b/drivers/gpu/drm/amd/display/dc/core/dc_surface.c
+@@ -71,8 +71,8 @@ struct dc_plane_state *dc_create_plane_state(struct dc *dc)
+ 	if (NULL == plane_state)
+ 		return NULL;
+ 
++	kref_init(&plane_state->refcount);
+ 	construct(core_dc->ctx, plane_state);
+-	atomic_inc(&plane_state->ref_count);
+ 
+ 	return plane_state;
+ }
+@@ -112,19 +112,19 @@ const struct dc_plane_status *dc_plane_get_status(
+ 
+ void dc_plane_state_retain(struct dc_plane_state *plane_state)
+ {
+-	ASSERT(atomic_read(&plane_state->ref_count) > 0);
+-	atomic_inc(&plane_state->ref_count);
++	kref_get(&plane_state->refcount);
+ }
+ 
+-void dc_plane_state_release(struct dc_plane_state *plane_state)
++static void dc_plane_state_free(struct kref *kref)
+ {
+-	ASSERT(atomic_read(&plane_state->ref_count) > 0);
+-	atomic_dec(&plane_state->ref_count);
++	struct dc_plane_state *plane_state = container_of(kref, struct dc_plane_state, refcount);
++	destruct(plane_state);
++	kfree(plane_state);
++}
+ 
+-	if (atomic_read(&plane_state->ref_count) == 0) {
+-		destruct(plane_state);
+-		kfree(plane_state);
+-	}
++void dc_plane_state_release(struct dc_plane_state *plane_state)
++{
++	kref_put(&plane_state->refcount, dc_plane_state_free);
+ }
+ 
+ void dc_gamma_retain(struct dc_gamma *gamma)
+diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
+index d04a155..857f4d5 100644
+--- a/drivers/gpu/drm/amd/display/dc/dc.h
++++ b/drivers/gpu/drm/amd/display/dc/dc.h
+@@ -381,7 +381,7 @@ struct dc_plane_state {
+ 
+ 	/* private to dc_surface.c */
+ 	enum dc_irq_source irq_source;
+-	atomic_t ref_count;
++	struct kref refcount;
+ };
+ 
+ struct dc_plane_info {
+-- 
+2.7.4
+