drm/atomic: Pass the full state to CRTC atomic_check

The current atomic helpers have either their object state being passed as
an argument or the full atomic state.

The former is the pattern that was done at first, before switching to the
latter for new hooks or when it was needed.

Let's start convert all the remaining helpers to provide a consistent
interface, starting with the CRTC's atomic_check.

The conversion was done using the coccinelle script below,
built tested on all the drivers and actually tested on vc4.

virtual report

@@
struct drm_crtc_helper_funcs *FUNCS;
struct drm_crtc *crtc;
struct drm_crtc_state *crtc_state;
identifier dev, state;
identifier ret, f;
@@

 f(struct drm_device *dev, struct drm_atomic_state *state)
 {
	<...
-	ret = FUNCS->atomic_check(crtc, crtc_state);
+	ret = FUNCS->atomic_check(crtc, state);
	...>
 }

@@
identifier crtc, new_state;
@@

 struct drm_crtc_helper_funcs {
 	...
-	int (*atomic_check)(struct drm_crtc *crtc, struct drm_crtc_state *new_state);
+	int (*atomic_check)(struct drm_crtc *crtc, struct drm_atomic_state *state);
 	...
}

@ crtc_atomic_func @
identifier helpers;
identifier func;
@@

static struct drm_crtc_helper_funcs helpers = {
	...,
	.atomic_check = func,
	...,
};

@ ignores_new_state @
identifier crtc_atomic_func.func;
identifier crtc, new_state;
@@

 int func(struct drm_crtc *crtc,
		struct drm_crtc_state *new_state)
 {
	... when != new_state
 }

@ adds_new_state depends on crtc_atomic_func && !ignores_new_state @
identifier crtc_atomic_func.func;
identifier crtc, new_state;
@@

 int func(struct drm_crtc *crtc, struct drm_crtc_state *new_state)
 {
+	struct drm_crtc_state *new_state = drm_atomic_get_new_crtc_state(state, crtc);
 	...
 }

@ depends on crtc_atomic_func @
identifier crtc_atomic_func.func;
expression E;
type T;
@@

 int func(...)
 {
	...
-	T state = E;
+	T crtc_state = E;
 	<+...
-	state
+	crtc_state
 	...+>
 }

@ depends on crtc_atomic_func @
identifier crtc_atomic_func.func;
type T;
@@

 int func(...)
 {
 	...
-	T state;
+	T crtc_state;
 	<+...
-	state
+	crtc_state
 	...+>
 }

@ depends on crtc_atomic_func @
identifier crtc_atomic_func.func;
identifier new_state;
identifier crtc;
@@

 int func(struct drm_crtc *crtc,
-	       struct drm_crtc_state *new_state
+	       struct drm_atomic_state *state
	       )
 { ... }

@@
identifier new_state;
identifier crtc;
@@

 int vmw_du_crtc_atomic_check(struct drm_crtc *crtc,
-                             struct drm_crtc_state *new_state
+                             struct drm_atomic_state *state
               )
 {
+       struct drm_crtc_state *new_state = drm_atomic_get_new_crtc_state(state, crtc);
	...
 }

@@
identifier new_state;
identifier crtc;
@@

 int vmw_du_crtc_atomic_check(struct drm_crtc *crtc,
-                             struct drm_crtc_state *new_state
+                             struct drm_atomic_state *state
               );

@ include depends on adds_new_state @
@@

 #include <drm/drm_atomic.h>

@ no_include depends on !include && adds_new_state @
@@

+ #include <drm/drm_atomic.h>
  #include <drm/...>

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20201028123222.1732139-1-maxime@cerno.tech

1 files changed, 13 insertions, 10 deletions

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 6a24ce245a37..169df7ca85fd 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -815,10 +815,12 @@ struct plane_state {
 };
 
 static int dpu_crtc_atomic_check(struct drm_crtc *crtc,
-		struct drm_crtc_state *state)
+		struct drm_atomic_state *state)
 {
+	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
+									  crtc);
 	struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
-	struct dpu_crtc_state *cstate = to_dpu_crtc_state(state);
+	struct dpu_crtc_state *cstate = to_dpu_crtc_state(crtc_state);
 	struct plane_state *pstates;
 
 	const struct drm_plane_state *pstate;
@@ -835,32 +837,33 @@ static int dpu_crtc_atomic_check(struct drm_crtc *crtc,
 
 	pstates = kzalloc(sizeof(*pstates) * DPU_STAGE_MAX * 4, GFP_KERNEL);
 
-	if (!state->enable || !state->active) {
+	if (!crtc_state->enable || !crtc_state->active) {
 		DPU_DEBUG("crtc%d -> enable %d, active %d, skip atomic_check\n",
-				crtc->base.id, state->enable, state->active);
+				crtc->base.id, crtc_state->enable,
+				crtc_state->active);
 		goto end;
 	}
 
-	mode = &state->adjusted_mode;
+	mode = &crtc_state->adjusted_mode;
 	DPU_DEBUG("%s: check", dpu_crtc->name);
 
 	/* force a full mode set if active state changed */
-	if (state->active_changed)
-		state->mode_changed = true;
+	if (crtc_state->active_changed)
+		crtc_state->mode_changed = true;
 
 	memset(pipe_staged, 0, sizeof(pipe_staged));
 
 	if (cstate->num_mixers) {
 		mixer_width = mode->hdisplay / cstate->num_mixers;
 
-		_dpu_crtc_setup_lm_bounds(crtc, state);
+		_dpu_crtc_setup_lm_bounds(crtc, crtc_state);
 	}
 
 	crtc_rect.x2 = mode->hdisplay;
 	crtc_rect.y2 = mode->vdisplay;
 
 	 /* get plane state for all drm planes associated with crtc state */
-	drm_atomic_crtc_state_for_each_plane_state(plane, pstate, state) {
+	drm_atomic_crtc_state_for_each_plane_state(plane, pstate, crtc_state) {
 		struct drm_rect dst, clip = crtc_rect;
 
 		if (IS_ERR_OR_NULL(pstate)) {
@@ -966,7 +969,7 @@ static int dpu_crtc_atomic_check(struct drm_crtc *crtc,
 
 	atomic_inc(&_dpu_crtc_get_kms(crtc)->bandwidth_ref);
 
-	rc = dpu_core_perf_crtc_check(crtc, state);
+	rc = dpu_core_perf_crtc_check(crtc, crtc_state);
 	if (rc) {
 		DPU_ERROR("crtc%d failed performance check %d\n",
 				crtc->base.id, rc);