drm: Don't implement empty prepare_fb()/cleanup_fb()

The plane .prepare_fb() and .cleanup_fb() helpers are optional, there's
no need to implement empty stubs, and no need to explicitly set the
function pointers to NULL either.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
[danvet: Resolved conflicts with Chris' patch.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 0 insertions, 17 deletions

diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index a02730f90861..3de7ce33d3d4 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -480,17 +480,6 @@ static const struct drm_plane_funcs tegra_primary_plane_funcs = {
         .atomic_destroy_state = tegra_plane_atomic_destroy_state,
 };
 
-static int tegra_plane_prepare_fb(struct drm_plane *plane,
-                                  struct drm_plane_state *new_state)
-{
-        return 0;
-}
-
-static void tegra_plane_cleanup_fb(struct drm_plane *plane,
-                                   struct drm_plane_state *old_fb)
-{
-}
-
 static int tegra_plane_state_add(struct tegra_plane *plane,
                                  struct drm_plane_state *state)
 {
@@ -624,8 +613,6 @@ static void tegra_plane_atomic_disable(struct drm_plane *plane,
 }
 
 static const struct drm_plane_helper_funcs tegra_primary_plane_helper_funcs = {
-        .prepare_fb = tegra_plane_prepare_fb,
-        .cleanup_fb = tegra_plane_cleanup_fb,
         .atomic_check = tegra_plane_atomic_check,
         .atomic_update = tegra_plane_atomic_update,
         .atomic_disable = tegra_plane_atomic_disable,
@@ -796,8 +783,6 @@ static const struct drm_plane_funcs tegra_cursor_plane_funcs = {
 };
 
 static const struct drm_plane_helper_funcs tegra_cursor_plane_helper_funcs = {
-        .prepare_fb = tegra_plane_prepare_fb,
-        .cleanup_fb = tegra_plane_cleanup_fb,
         .atomic_check = tegra_cursor_atomic_check,
         .atomic_update = tegra_cursor_atomic_update,
         .atomic_disable = tegra_cursor_atomic_disable,
@@ -866,8 +851,6 @@ static const uint32_t tegra_overlay_plane_formats[] = {
 };
 
 static const struct drm_plane_helper_funcs tegra_overlay_plane_helper_funcs = {
-        .prepare_fb = tegra_plane_prepare_fb,
-        .cleanup_fb = tegra_plane_cleanup_fb,
         .atomic_check = tegra_plane_atomic_check,
         .atomic_update = tegra_plane_atomic_update,
         .atomic_disable = tegra_plane_atomic_disable,