On Fri, Aug 14, 2026 at 04:57:07PM +0200, Maxime Ripard wrote:
> The plane only initializes a pristine state in its reset hook
> using drm_atomic_helper_plane_reset(), which is equivalent to what
> atomic_create_state expects. Convert to it.
>
> The conversion was done using the following Coccinelle semantic patch:
>
> @@
> identifier funcs;
> symbol drm_atomic_helper_plane_reset;
> symbol drm_atomic_helper_plane_create_state;
> @@
>
> struct drm_plane_funcs funcs = {
> ...,
> - .reset = drm_atomic_helper_plane_reset,
> + .atomic_create_state = drm_atomic_helper_plane_create_state,
> ...,
> };
>
> @match_struct_reset@
> identifier funcs, reset_func;
> @@
> struct drm_plane_funcs funcs = {
> ...,
> .reset = reset_func,
> ...,
> };
>
> @reset_uses_helpers depends on match_struct_reset@
> identifier match_struct_reset.reset_func;
> @@
>
> void reset_func(...)
> {
> <+...
> (
> __drm_atomic_helper_plane_reset(...);
> |
> __drm_gem_reset_shadow_plane(...);
> )
> ...+>
> }
>
> @match_struct_destroy@
> identifier funcs, destroy_func;
> @@
> struct drm_plane_funcs funcs = {
> ...,
> .atomic_destroy_state = destroy_func,
> ...,
> };
>
> @script:python renamed_func@
> old_name << match_struct_reset.reset_func;
> new_name;
> @@
> if old_name.endswith("_reset"):
> coccinelle.new_name = old_name.replace("_reset", "_create_state")
> else:
> coccinelle.new_name = old_name
>
> @update_struct depends on match_struct_reset && reset_uses_helpers@
> identifier match_struct_reset.funcs, match_struct_reset.reset_func;
> identifier renamed_func.new_name;
> @@
> struct drm_plane_funcs funcs = {
> ...,
> - .reset = reset_func,
> + .atomic_create_state = new_name,
> ...,
> };
>
> @drop_destroy depends on update_struct && match_struct_destroy@
> identifier match_struct_reset.reset_func;
> identifier match_struct_destroy.destroy_func;
> identifier container_func;
> identifier P;
> symbol drm_atomic_helper_plane_destroy_state;
> symbol __drm_atomic_helper_plane_destroy_state;
> @@
>
> void reset_func(struct drm_plane *P)
> {
> ...
> (
> - if (P->state) {
> - <+...
> (
> - drm_atomic_helper_plane_destroy_state(P, P->state);
> |
> - __drm_atomic_helper_plane_destroy_state(P->state);
> |
> - P->funcs->atomic_destroy_state(P, P->state);
> |
> - destroy_func(P, P->state);
> )
> - ...+>
> - }
> |
> - drm_WARN_ON_ONCE(P->dev, P->state);
> |
> - WARN_ON(P->state);
> )
> ...
> (
> - kfree(P->state);
> |
> - kfree(container_func(P->state));
> |
> // kfree is optional
> )
> (
> - P->state = NULL;
> |
> // plane->state clearing is optional
> )
> ...
> }
>
> @drop_destroy_mtk depends on update_struct@
> identifier P;
> symbol __drm_atomic_helper_plane_destroy_state;
> symbol to_mtk_plane_state;
> @@
>
> void mtk_plane_reset(struct drm_plane *P)
> {
> ...
> - if (P->state) {
> - __drm_atomic_helper_plane_destroy_state(P->state);
> - ...
> - } else {
> ...
> - }
> ...
> }
>
> @transform_nv50_wndw depends on update_struct@
> identifier S;
> @@
>
> void nv50_wndw_reset(...)
> {
> ...
> - if (WARN_ON(!(S = kzalloc_obj(*S))))
> + S = kzalloc_obj(*S);
> + if (WARN_ON(!S))
> return;
> ...
> }
>
> @transform_kzalloc depends on update_struct@
> identifier match_struct_reset.reset_func;
> identifier P, S;
> statement ST;
> statement list STL;
> @@
>
> void reset_func(struct drm_plane *P)
> {
> <...
> S = kzalloc_obj(*S);
> (
> - if (S)
> - {
> - STL
> - }
> + if (!S) return;
> +
> + STL
> |
> - if (S) ST
> + if (!S) return;
> +
> + ST
> )
> ...>
> }
>
> @transform_body depends on update_struct@
> identifier match_struct_reset.reset_func;
> identifier renamed_func.new_name;
> identifier S, P;
> expression PS;
> @@
> - void reset_func(struct drm_plane *P)
> + struct drm_plane_state *new_name(struct drm_plane *P)
> {
> ...
> S = kzalloc_obj(*S);
> ...
> (
> if (!S) {
> ...
> - return;
> + return ERR_PTR(-ENOMEM);
> }
> |
> if (WARN_ON(!S)) {
> ...
> - return;
> + return ERR_PTR(-ENOMEM);
> }
> |
> if (S == NULL) {
> ...
> - return;
> + return ERR_PTR(-ENOMEM);
> }
> )
> ...
> (
> - __drm_atomic_helper_plane_reset(P, PS);
> + __drm_atomic_helper_plane_state_init(PS, P);
> |
> - __drm_gem_reset_shadow_plane(P, PS);
> + __drm_gem_shadow_plane_state_init(P, PS);
> )
> ...
> }
>
> @update_early_return depends on update_struct@
> identifier match_struct_reset.reset_func;
> identifier renamed_func.new_name;
> identifier P;
> expression PS;
> @@
> struct drm_plane_state *new_name(struct drm_plane *P)
> {
> <+...
> - return;
> + return ERR_PTR(-EINVAL);
> ...+>
> }
>
> @update_return_plane depends on update_struct@
> identifier match_struct_reset.reset_func;
> identifier renamed_func.new_name;
> identifier P;
> expression PS;
> @@
> struct drm_plane_state *new_name(struct drm_plane *P)
> {
> ...
> __drm_atomic_helper_plane_state_init(PS, P);
> ...
> +
> + return PS;
> }
>
> @update_return_shadow depends on update_struct@
> identifier renamed_func.new_name;
> identifier P;
> expression PS;
> @@
> struct drm_plane_state *new_name(struct drm_plane *P)
> {
> ...
> __drm_gem_shadow_plane_state_init(P, PS);
> ...
> +
> + return &PS->base;
> }
>
> Signed-off-by: Maxime Ripard <[email protected]>
Reviewed-by: Laurentiu Palcu <[email protected]>
--
Thanks,
Laurentiu
