[PATCH 4.19.y-cip 1/2] drm: Add drm_atomic_get_old/new_private_obj_state

Biju Das <biju.das.jz@...>

From: "james qian wang (Arm Technology China)" <james.qian.wang@arm.com>

commit 9801a7eadf4cc29cdc90583a49f12decbb832ced upstream.

This pair of functions return the old/new private object state for the
given private_obj, or NULL if the private_obj is not part of the global
atomic state.

Reviewed-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe@arm.com>
Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
[removed changes in drivers/gpu/drm/drm_atomic.c, since the same changes
are already present as part of the commit 60b4667275b6]
include/drm/drm_atomic.h | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index c0b48e25a620..6329ed4af310 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -402,6 +402,12 @@ void drm_atomic_private_obj_fini(struct drm_private_obj *obj);
struct drm_private_state * __must_check
drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
struct drm_private_obj *obj);
+struct drm_private_state *
+drm_atomic_get_old_private_obj_state(struct drm_atomic_state *state,
+ struct drm_private_obj *obj);
+struct drm_private_state *
+drm_atomic_get_new_private_obj_state(struct drm_atomic_state *state,
+ struct drm_private_obj *obj);

struct drm_connector *
drm_atomic_get_old_connector_for_encoder(struct drm_atomic_state *state,

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