drm: Store new plane state in a variable for atomic_update and disable

In order to store the new plane state in a subsequent helper, let's move
the plane->state dereferences into a variable.

This was done using the following coccinelle script, plus some hand
changes for vmwgfx:

@ 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,
	...,
 };
)

@ has_new_state_old_state @
identifier plane_atomic_func.func;
identifier plane;
identifier new_state;
symbol old_state;
@@

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

@ depends on !has_new_state_old_state @
identifier plane_atomic_func.func;
identifier plane;
symbol old_state;
@@

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

@ has_new_state_state @
identifier plane_atomic_func.func;
identifier plane;
identifier new_state;
symbol state;
@@

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

@ depends on !has_new_state_state @
identifier plane_atomic_func.func;
identifier plane;
symbol state;
@@

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

@ has_new_state_old_s @
identifier plane_atomic_func.func;
identifier plane;
identifier new_state;
symbol old_s;
@@

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

@ depends on !has_new_state_old_s @
identifier plane_atomic_func.func;
identifier plane;
symbol old_s;
@@

 func(struct drm_plane *plane, struct drm_plane_state *old_s)
 {
+	struct drm_plane_state *new_s = plane->state;
 	<+...
-	plane->state
+	new_s
	...+>
 }

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20210219120032.260676-1-maxime@cerno.tech

2 files changed, 35 insertions, 32 deletions

diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index bd2ee94f6f52..9231c6ef602a 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -708,34 +708,35 @@ static void tegra_plane_atomic_disable(struct drm_plane *plane,
 static void tegra_plane_atomic_update(struct drm_plane *plane,
 				      struct drm_plane_state *old_state)
 {
-	struct tegra_plane_state *state = to_tegra_plane_state(plane->state);
-	struct drm_framebuffer *fb = plane->state->fb;
+	struct drm_plane_state *new_state = plane->state;
+	struct tegra_plane_state *state = to_tegra_plane_state(new_state);
+	struct drm_framebuffer *fb = new_state->fb;
 	struct tegra_plane *p = to_tegra_plane(plane);
 	struct tegra_dc_window window;
 	unsigned int i;
 
 	/* rien ne va plus */
-	if (!plane->state->crtc || !plane->state->fb)
+	if (!new_state->crtc || !new_state->fb)
 		return;
 
-	if (!plane->state->visible)
+	if (!new_state->visible)
 		return tegra_plane_atomic_disable(plane, old_state);
 
 	memset(&window, 0, sizeof(window));
-	window.src.x = plane->state->src.x1 >> 16;
-	window.src.y = plane->state->src.y1 >> 16;
-	window.src.w = drm_rect_width(&plane->state->src) >> 16;
-	window.src.h = drm_rect_height(&plane->state->src) >> 16;
-	window.dst.x = plane->state->dst.x1;
-	window.dst.y = plane->state->dst.y1;
-	window.dst.w = drm_rect_width(&plane->state->dst);
-	window.dst.h = drm_rect_height(&plane->state->dst);
+	window.src.x = new_state->src.x1 >> 16;
+	window.src.y = new_state->src.y1 >> 16;
+	window.src.w = drm_rect_width(&new_state->src) >> 16;
+	window.src.h = drm_rect_height(&new_state->src) >> 16;
+	window.dst.x = new_state->dst.x1;
+	window.dst.y = new_state->dst.y1;
+	window.dst.w = drm_rect_width(&new_state->dst);
+	window.dst.h = drm_rect_height(&new_state->dst);
 	window.bits_per_pixel = fb->format->cpp[0] * 8;
 	window.reflect_x = state->reflect_x;
 	window.reflect_y = state->reflect_y;
 
 	/* copy from state */
-	window.zpos = plane->state->normalized_zpos;
+	window.zpos = new_state->normalized_zpos;
 	window.tiling = state->tiling;
 	window.format = state->format;
 	window.swap = state->swap;
@@ -867,15 +868,16 @@ static int tegra_cursor_atomic_check(struct drm_plane *plane,
 static void tegra_cursor_atomic_update(struct drm_plane *plane,
 				       struct drm_plane_state *old_state)
 {
-	struct tegra_plane_state *state = to_tegra_plane_state(plane->state);
-	struct tegra_dc *dc = to_tegra_dc(plane->state->crtc);
+	struct drm_plane_state *new_state = plane->state;
+	struct tegra_plane_state *state = to_tegra_plane_state(new_state);
+	struct tegra_dc *dc = to_tegra_dc(new_state->crtc);
 	u32 value = CURSOR_CLIP_DISPLAY;
 
 	/* rien ne va plus */
-	if (!plane->state->crtc || !plane->state->fb)
+	if (!new_state->crtc || !new_state->fb)
 		return;
 
-	switch (plane->state->crtc_w) {
+	switch (new_state->crtc_w) {
 	case 32:
 		value |= CURSOR_SIZE_32x32;
 		break;
@@ -894,7 +896,7 @@ static void tegra_cursor_atomic_update(struct drm_plane *plane,
 
 	default:
 		WARN(1, "cursor size %ux%u not supported\n",
-		     plane->state->crtc_w, plane->state->crtc_h);
+		     new_state->crtc_w, new_state->crtc_h);
 		return;
 	}
 
@@ -921,8 +923,8 @@ static void tegra_cursor_atomic_update(struct drm_plane *plane,
 	tegra_dc_writel(dc, value, DC_DISP_BLEND_CURSOR_CONTROL);
 
 	/* position the cursor */
-	value = (plane->state->crtc_y & 0x3fff) << 16 |
-		(plane->state->crtc_x & 0x3fff);
+	value = (new_state->crtc_y & 0x3fff) << 16 |
+		(new_state->crtc_x & 0x3fff);
 	tegra_dc_writel(dc, value, DC_DISP_CURSOR_POSITION);
 }
 
diff --git a/drivers/gpu/drm/tegra/hub.c b/drivers/gpu/drm/tegra/hub.c
index e5b22508e09a..e9d86aec5ee8 100644
--- a/drivers/gpu/drm/tegra/hub.c
+++ b/drivers/gpu/drm/tegra/hub.c
@@ -427,20 +427,21 @@ static void tegra_shared_plane_atomic_disable(struct drm_plane *plane,
 static void tegra_shared_plane_atomic_update(struct drm_plane *plane,
 					     struct drm_plane_state *old_state)
 {
-	struct tegra_plane_state *state = to_tegra_plane_state(plane->state);
-	struct tegra_dc *dc = to_tegra_dc(plane->state->crtc);
-	unsigned int zpos = plane->state->normalized_zpos;
-	struct drm_framebuffer *fb = plane->state->fb;
+	struct drm_plane_state *new_state = plane->state;
+	struct tegra_plane_state *state = to_tegra_plane_state(new_state);
+	struct tegra_dc *dc = to_tegra_dc(new_state->crtc);
+	unsigned int zpos = new_state->normalized_zpos;
+	struct drm_framebuffer *fb = new_state->fb;
 	struct tegra_plane *p = to_tegra_plane(plane);
 	dma_addr_t base;
 	u32 value;
 	int err;
 
 	/* rien ne va plus */
-	if (!plane->state->crtc || !plane->state->fb)
+	if (!new_state->crtc || !new_state->fb)
 		return;
 
-	if (!plane->state->visible) {
+	if (!new_state->visible) {
 		tegra_shared_plane_atomic_disable(plane, old_state);
 		return;
 	}
@@ -484,17 +485,17 @@ static void tegra_shared_plane_atomic_update(struct drm_plane *plane,
 	tegra_plane_writel(p, state->format, DC_WIN_COLOR_DEPTH);
 	tegra_plane_writel(p, 0, DC_WIN_PRECOMP_WGRP_PARAMS);
 
-	value = V_POSITION(plane->state->crtc_y) |
-		H_POSITION(plane->state->crtc_x);
+	value = V_POSITION(new_state->crtc_y) |
+		H_POSITION(new_state->crtc_x);
 	tegra_plane_writel(p, value, DC_WIN_POSITION);
 
-	value = V_SIZE(plane->state->crtc_h) | H_SIZE(plane->state->crtc_w);
+	value = V_SIZE(new_state->crtc_h) | H_SIZE(new_state->crtc_w);
 	tegra_plane_writel(p, value, DC_WIN_SIZE);
 
 	value = WIN_ENABLE | COLOR_EXPAND;
 	tegra_plane_writel(p, value, DC_WIN_WIN_OPTIONS);
 
-	value = V_SIZE(plane->state->crtc_h) | H_SIZE(plane->state->crtc_w);
+	value = V_SIZE(new_state->crtc_h) | H_SIZE(new_state->crtc_w);
 	tegra_plane_writel(p, value, DC_WIN_CROPPED_SIZE);
 
 	tegra_plane_writel(p, upper_32_bits(base), DC_WINBUF_START_ADDR_HI);
@@ -506,8 +507,8 @@ static void tegra_shared_plane_atomic_update(struct drm_plane *plane,
 	value = CLAMP_BEFORE_BLEND | DEGAMMA_SRGB | INPUT_RANGE_FULL;
 	tegra_plane_writel(p, value, DC_WIN_SET_PARAMS);
 
-	value = OFFSET_X(plane->state->src_y >> 16) |
-		OFFSET_Y(plane->state->src_x >> 16);
+	value = OFFSET_X(new_state->src_y >> 16) |
+		OFFSET_Y(new_state->src_x >> 16);
 	tegra_plane_writel(p, value, DC_WINBUF_CROPPED_POINT);
 
 	if (dc->soc->supports_block_linear) {