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

3 files changed, 12 insertions, 12 deletions

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index edbba85feb33..3c20b4c3ca9a 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -1244,13 +1244,13 @@ static void dpu_plane_atomic_update(struct drm_plane *plane,
 				struct drm_plane_state *old_state)
 {
 	struct dpu_plane *pdpu = to_dpu_plane(plane);
-	struct drm_plane_state *state = plane->state;
+	struct drm_plane_state *new_state = plane->state;
 
 	pdpu->is_error = false;
 
 	DPU_DEBUG_PLANE(pdpu, "\n");
 
-	if (!state->visible) {
+	if (!new_state->visible) {
 		_dpu_plane_atomic_disable(plane);
 	} else {
 		dpu_plane_sspp_atomic_update(plane);
diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_plane.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_plane.c
index f95b14ebfa8a..b4c74c1047ba 100644
--- a/drivers/gpu/drm/msm/disp/mdp4/mdp4_plane.c
+++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_plane.c
@@ -114,15 +114,15 @@ static int mdp4_plane_atomic_check(struct drm_plane *plane,
 static void mdp4_plane_atomic_update(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;
 	int ret;
 
 	ret = mdp4_plane_mode_set(plane,
-			state->crtc, state->fb,
-			state->crtc_x, state->crtc_y,
-			state->crtc_w, state->crtc_h,
-			state->src_x,  state->src_y,
-			state->src_w, state->src_h);
+			new_state->crtc, new_state->fb,
+			new_state->crtc_x, new_state->crtc_y,
+			new_state->crtc_w, new_state->crtc_h,
+			new_state->src_x,  new_state->src_y,
+			new_state->src_w, new_state->src_h);
 	/* atomic_check should have ensured that this doesn't fail */
 	WARN_ON(ret < 0);
 }
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c
index 6ce6ce09fecc..da1cc66f9f49 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c
@@ -428,16 +428,16 @@ static int mdp5_plane_atomic_check(struct drm_plane *plane,
 static void mdp5_plane_atomic_update(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;
 
 	DBG("%s: update", plane->name);
 
-	if (plane_enabled(state)) {
+	if (plane_enabled(new_state)) {
 		int ret;
 
 		ret = mdp5_plane_mode_set(plane,
-				state->crtc, state->fb,
-				&state->src, &state->dst);
+				new_state->crtc, new_state->fb,
+				&new_state->src, &new_state->dst);
 		/* atomic_check should have ensured that this doesn't fail */
 		WARN_ON(ret < 0);
 	}