drm: Use the state pointer directly in atomic_check

Now that atomic_check takes the global atomic state as a parameter, we
don't need to go through the pointer in the CRTC state.

This was done using the following coccinelle script:

@ crtc_atomic_func @
identifier helpers;
identifier func;
@@

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

@@
identifier crtc_atomic_func.func;
identifier crtc, state;
@@

  func(struct drm_crtc *crtc, struct drm_atomic_state *state) {
  ...
- struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
  ... when != crtc_state
- crtc_state->state
+ state
  ...
 }

@@
struct drm_crtc_state *crtc_state;
identifier crtc_atomic_func.func;
identifier crtc, state;
@@

  func(struct drm_crtc *crtc, struct drm_atomic_state *state) {
  ...
- crtc_state->state
+ state
  ...
 }

Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201102133834.1176740-3-maxime@cerno.tech

drivers/gpu/drm/drm_simple_kms_helper.c

@@ -97,7 +97,7 @@ static int drm_simple_kms_crtc_check(struct drm_crtc *crtc,
 	if (has_primary != crtc_state->enable)
 		return -EINVAL;
 
-	return drm_atomic_add_affected_planes(crtc_state->state, crtc);
+	return drm_atomic_add_affected_planes(state, crtc);
 }
 
 static void drm_simple_kms_crtc_enable(struct drm_crtc *crtc,

drivers/gpu/drm/mxsfb/mxsfb_kms.c

@@ -281,7 +281,7 @@ static int mxsfb_crtc_atomic_check(struct drm_crtc *crtc,
 		return -EINVAL;
 
 	/* TODO: Is this needed ? */
-	return drm_atomic_add_affected_planes(crtc_state->state, crtc);
+	return drm_atomic_add_affected_planes(state, crtc);
 }
 
 static void mxsfb_crtc_atomic_flush(struct drm_crtc *crtc,

drivers/gpu/drm/omapdrm/omap_crtc.c

@@ -583,7 +583,7 @@ static int omap_crtc_atomic_check(struct drm_crtc *crtc,
 			return -EINVAL;
 	}
 
-	pri_state = drm_atomic_get_new_plane_state(crtc_state->state,
+	pri_state = drm_atomic_get_new_plane_state(state,
 						   crtc->primary);
 	if (pri_state) {
 		struct omap_crtc_state *omap_crtc_state =

drivers/gpu/drm/tilcdc/tilcdc_crtc.c

@@ -665,9 +665,9 @@ static int tilcdc_crtc_atomic_check(struct drm_crtc *crtc,
 	if (!crtc_state->active)
 		return 0;
 
-	if (crtc_state->state->planes[0].ptr != crtc->primary ||
-	    crtc_state->state->planes[0].state == NULL ||
-	    crtc_state->state->planes[0].state->crtc != crtc) {
+	if (state->planes[0].ptr != crtc->primary ||
+	    state->planes[0].state == NULL ||
+	    state->planes[0].state->crtc != crtc) {
 		dev_dbg(crtc->dev->dev, "CRTC primary plane must be present");
 		return -EINVAL;
 	}

drivers/gpu/drm/vc4/vc4_crtc.c

@@ -597,7 +597,7 @@ static int vc4_crtc_atomic_check(struct drm_crtc *crtc,
 	if (ret)
 		return ret;
 
-	for_each_new_connector_in_state(crtc_state->state, conn, conn_state,
+	for_each_new_connector_in_state(state, conn, conn_state,
 					i) {
 		if (conn_state->crtc != crtc)
 			continue;

drivers/gpu/drm/xlnx/zynqmp_disp.c

@@ -1506,9 +1506,7 @@ zynqmp_disp_crtc_atomic_disable(struct drm_crtc *crtc,
 static int zynqmp_disp_crtc_atomic_check(struct drm_crtc *crtc,
 					 struct drm_atomic_state *state)
 {
-	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
-									  crtc);
-	return drm_atomic_add_affected_planes(crtc_state->state, crtc);
+	return drm_atomic_add_affected_planes(state, crtc);
 }
 
 static void