drm: Rename plane->state variables in atomic update and disable

Some drivers are storing the plane->state pointer in atomic_update and
atomic_disable in a variable simply called state, while the state passed
as an argument is called old_state.

In order to ease subsequent reworks and to avoid confusing or
inconsistent names, let's rename those variables to new_state.

This was done using the following coccinelle script, plus some manual
changes for mtk and tegra.

@ plane_atomic_func @
identifier helpers;
identifier func;
@@

(
 static const struct drm_plane_helper_funcs helpers = {
 	...,
 	.atomic_disable = func,
	...,
 };
|
 static const struct drm_plane_helper_funcs helpers = {
 	...,
 	.atomic_update = func,
	...,
 };
)

@ moves_new_state_old_state @
identifier plane_atomic_func.func;
identifier plane;
symbol old_state;
symbol state;
@@

 func(struct drm_plane *plane, struct drm_plane_state *old_state)
 {
 	...
-	struct drm_plane_state *state = plane->state;
+	struct drm_plane_state *new_state = plane->state;
	...
 }

@ depends on moves_new_state_old_state @
identifier plane_atomic_func.func;
identifier plane;
identifier old_state;
symbol state;
@@

 func(struct drm_plane *plane, struct drm_plane_state *old_state)
 {
 	<...
-	state
+	new_state
	...>
 }

@ moves_new_state_oldstate @
identifier plane_atomic_func.func;
identifier plane;
symbol oldstate;
symbol state;
@@

 func(struct drm_plane *plane, struct drm_plane_state *oldstate)
 {
 	...
-	struct drm_plane_state *state = plane->state;
+	struct drm_plane_state *newstate = plane->state;
	...
 }

@ depends on moves_new_state_oldstate @
identifier plane_atomic_func.func;
identifier plane;
identifier old_state;
symbol state;
@@

 func(struct drm_plane *plane, struct drm_plane_state *old_state)
 {
 	<...
-	state
+	newstate
	...>
 }

@ moves_new_state_old_pstate @
identifier plane_atomic_func.func;
identifier plane;
symbol old_pstate;
symbol state;
@@

 func(struct drm_plane *plane, struct drm_plane_state *old_pstate)
 {
 	...
-	struct drm_plane_state *state = plane->state;
+	struct drm_plane_state *new_pstate = plane->state;
	...
 }

@ depends on moves_new_state_old_pstate @
identifier plane_atomic_func.func;
identifier plane;
identifier old_pstate;
symbol state;
@@

 func(struct drm_plane *plane, struct drm_plane_state *old_pstate)
 {
 	<...
-	state
+	new_pstate
	...>
 }

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210219120032.260676-8-maxime@cerno.tech

1 files changed, 14 insertions, 15 deletions

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
index 9d82ea6f4f8c..9a478f0630ac 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
@@ -176,18 +176,17 @@ static void mtk_plane_atomic_disable(struct drm_plane *plane,
 				     struct drm_plane_state *old_state)
 {
 	struct drm_plane_state *new_state = plane->state;
-	struct mtk_plane_state *state = to_mtk_plane_state(new_state);
-
-	state->pending.enable = false;
+	struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
+	mtk_plane_state->pending.enable = false;
 	wmb(); /* Make sure the above parameter is set before update */
-	state->pending.dirty = true;
+	mtk_plane_state->pending.dirty = true;
 }
 
 static void mtk_plane_atomic_update(struct drm_plane *plane,
 				    struct drm_plane_state *old_state)
 {
 	struct drm_plane_state *new_state = plane->state;
-	struct mtk_plane_state *state = to_mtk_plane_state(new_state);
+	struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
 	struct drm_crtc *crtc = new_state->crtc;
 	struct drm_framebuffer *fb = new_state->fb;
 	struct drm_gem_object *gem;
@@ -212,17 +211,17 @@ static void mtk_plane_atomic_update(struct drm_plane *plane,
 	addr += (new_state->src.x1 >> 16) * fb->format->cpp[0];
 	addr += (new_state->src.y1 >> 16) * pitch;
 
-	state->pending.enable = true;
-	state->pending.pitch = pitch;
-	state->pending.format = format;
-	state->pending.addr = addr;
-	state->pending.x = new_state->dst.x1;
-	state->pending.y = new_state->dst.y1;
-	state->pending.width = drm_rect_width(&new_state->dst);
-	state->pending.height = drm_rect_height(&new_state->dst);
-	state->pending.rotation = new_state->rotation;
+	mtk_plane_state->pending.enable = true;
+	mtk_plane_state->pending.pitch = pitch;
+	mtk_plane_state->pending.format = format;
+	mtk_plane_state->pending.addr = addr;
+	mtk_plane_state->pending.x = new_state->dst.x1;
+	mtk_plane_state->pending.y = new_state->dst.y1;
+	mtk_plane_state->pending.width = drm_rect_width(&new_state->dst);
+	mtk_plane_state->pending.height = drm_rect_height(&new_state->dst);
+	mtk_plane_state->pending.rotation = new_state->rotation;
 	wmb(); /* Make sure the above parameters are set before update */
-	state->pending.dirty = true;
+	mtk_plane_state->pending.dirty = true;
 }
 
 static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {