drm: Move drm_plane_helper_check_state() into drm_atomic_helper.c

drm_plane_helper_check_update() isn't a transitional helper, so let's
rename it to drm_atomic_helper_check_plane_state() and move it into
drm_atomic_helper.c.

v2: Fix the WARNs about plane_state->crtc matching crtc_state->crtc

Cc: Daniel Vetter <daniel@ffwll.ch>
Suggested-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171101201619.6175-1-ville.syrjala@linux.intel.comReviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/arm/hdlcd_crtc.c

@@ -252,7 +252,7 @@ static int hdlcd_plane_atomic_check(struct drm_plane *plane,
 	clip.x2 = crtc_state->adjusted_mode.hdisplay;
 	clip.y2 = crtc_state->adjusted_mode.vdisplay;
 
-	return drm_plane_helper_check_state(state, crtc_state, &clip,
+	return drm_atomic_helper_check_plane_state(state, crtc_state, &clip,
 						   DRM_PLANE_HELPER_NO_SCALING,
 						   DRM_PLANE_HELPER_NO_SCALING,
 						   false, true);

drivers/gpu/drm/arm/malidp_planes.c

@@ -150,7 +150,7 @@ static int malidp_se_check_scaling(struct malidp_plane *mp,
 
 	clip.x2 = crtc_state->adjusted_mode.hdisplay;
 	clip.y2 = crtc_state->adjusted_mode.vdisplay;
-	ret = drm_plane_helper_check_state(state, crtc_state, &clip,
+	ret = drm_atomic_helper_check_plane_state(state, crtc_state, &clip,
 						  0, INT_MAX, true, true);
 	if (ret)
 		return ret;

drivers/gpu/drm/drm_atomic_helper.c

@@ -695,6 +695,100 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
 }
 EXPORT_SYMBOL(drm_atomic_helper_check_modeset);
 
+/**
+ * drm_atomic_helper_check_plane_state() - Check plane state for validity
+ * @plane_state: plane state to check
+ * @crtc_state: crtc state to check
+ * @clip: integer clipping coordinates
+ * @min_scale: minimum @src:@dest scaling factor in 16.16 fixed point
+ * @max_scale: maximum @src:@dest scaling factor in 16.16 fixed point
+ * @can_position: is it legal to position the plane such that it
+ *                doesn't cover the entire crtc?  This will generally
+ *                only be false for primary planes.
+ * @can_update_disabled: can the plane be updated while the crtc
+ *                       is disabled?
+ *
+ * Checks that a desired plane update is valid, and updates various
+ * bits of derived state (clipped coordinates etc.). Drivers that provide
+ * their own plane handling rather than helper-provided implementations may
+ * still wish to call this function to avoid duplication of error checking
+ * code.
+ *
+ * RETURNS:
+ * Zero if update appears valid, error code on failure
+ */
+int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state,
+					const struct drm_crtc_state *crtc_state,
+					const struct drm_rect *clip,
+					int min_scale,
+					int max_scale,
+					bool can_position,
+					bool can_update_disabled)
+{
+	struct drm_framebuffer *fb = plane_state->fb;
+	struct drm_rect *src = &plane_state->src;
+	struct drm_rect *dst = &plane_state->dst;
+	unsigned int rotation = plane_state->rotation;
+	int hscale, vscale;
+
+	WARN_ON(plane_state->crtc && plane_state->crtc != crtc_state->crtc);
+
+	*src = drm_plane_state_src(plane_state);
+	*dst = drm_plane_state_dest(plane_state);
+
+	if (!fb) {
+		plane_state->visible = false;
+		return 0;
+	}
+
+	/* crtc should only be NULL when disabling (i.e., !fb) */
+	if (WARN_ON(!plane_state->crtc)) {
+		plane_state->visible = false;
+		return 0;
+	}
+
+	if (!crtc_state->enable && !can_update_disabled) {
+		DRM_DEBUG_KMS("Cannot update plane of a disabled CRTC.\n");
+		return -EINVAL;
+	}
+
+	drm_rect_rotate(src, fb->width << 16, fb->height << 16, rotation);
+
+	/* Check scaling */
+	hscale = drm_rect_calc_hscale(src, dst, min_scale, max_scale);
+	vscale = drm_rect_calc_vscale(src, dst, min_scale, max_scale);
+	if (hscale < 0 || vscale < 0) {
+		DRM_DEBUG_KMS("Invalid scaling of plane\n");
+		drm_rect_debug_print("src: ", &plane_state->src, true);
+		drm_rect_debug_print("dst: ", &plane_state->dst, false);
+		return -ERANGE;
+	}
+
+	plane_state->visible = drm_rect_clip_scaled(src, dst, clip, hscale, vscale);
+
+	drm_rect_rotate_inv(src, fb->width << 16, fb->height << 16, rotation);
+
+	if (!plane_state->visible)
+		/*
+		 * Plane isn't visible; some drivers can handle this
+		 * so we just return success here.  Drivers that can't
+		 * (including those that use the primary plane helper's
+		 * update function) will return an error from their
+		 * update_plane handler.
+		 */
+		return 0;
+
+	if (!can_position && !drm_rect_equals(dst, clip)) {
+		DRM_DEBUG_KMS("Plane must cover entire CRTC\n");
+		drm_rect_debug_print("dst: ", dst, false);
+		drm_rect_debug_print("clip: ", clip, false);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_atomic_helper_check_plane_state);
+
 /**
  * drm_atomic_helper_check_planes - validate state object for planes changes
  * @dev: DRM device

drivers/gpu/drm/drm_plane_helper.c

@@ -99,100 +99,6 @@ static int get_connectors_for_crtc(struct drm_crtc *crtc,
 	return count;
 }
 
-/**
- * drm_plane_helper_check_state() - Check plane state for validity
- * @plane_state: plane state to check
- * @crtc_state: crtc state to check
- * @clip: integer clipping coordinates
- * @min_scale: minimum @src:@dest scaling factor in 16.16 fixed point
- * @max_scale: maximum @src:@dest scaling factor in 16.16 fixed point
- * @can_position: is it legal to position the plane such that it
- *                doesn't cover the entire crtc?  This will generally
- *                only be false for primary planes.
- * @can_update_disabled: can the plane be updated while the crtc
- *                       is disabled?
- *
- * Checks that a desired plane update is valid, and updates various
- * bits of derived state (clipped coordinates etc.). Drivers that provide
- * their own plane handling rather than helper-provided implementations may
- * still wish to call this function to avoid duplication of error checking
- * code.
- *
- * RETURNS:
- * Zero if update appears valid, error code on failure
- */
-int drm_plane_helper_check_state(struct drm_plane_state *plane_state,
-				 const struct drm_crtc_state *crtc_state,
-				 const struct drm_rect *clip,
-				 int min_scale,
-				 int max_scale,
-				 bool can_position,
-				 bool can_update_disabled)
-{
-	struct drm_framebuffer *fb = plane_state->fb;
-	struct drm_rect *src = &plane_state->src;
-	struct drm_rect *dst = &plane_state->dst;
-	unsigned int rotation = plane_state->rotation;
-	int hscale, vscale;
-
-	WARN_ON(plane_state->crtc && plane_state->crtc != crtc_state->crtc);
-
-	*src = drm_plane_state_src(plane_state);
-	*dst = drm_plane_state_dest(plane_state);
-
-	if (!fb) {
-		plane_state->visible = false;
-		return 0;
-	}
-
-	/* crtc should only be NULL when disabling (i.e., !fb) */
-	if (WARN_ON(!plane_state->crtc)) {
-		plane_state->visible = false;
-		return 0;
-	}
-
-	if (!crtc_state->enable && !can_update_disabled) {
-		DRM_DEBUG_KMS("Cannot update plane of a disabled CRTC.\n");
-		return -EINVAL;
-	}
-
-	drm_rect_rotate(src, fb->width << 16, fb->height << 16, rotation);
-
-	/* Check scaling */
-	hscale = drm_rect_calc_hscale(src, dst, min_scale, max_scale);
-	vscale = drm_rect_calc_vscale(src, dst, min_scale, max_scale);
-	if (hscale < 0 || vscale < 0) {
-		DRM_DEBUG_KMS("Invalid scaling of plane\n");
-		drm_rect_debug_print("src: ", &plane_state->src, true);
-		drm_rect_debug_print("dst: ", &plane_state->dst, false);
-		return -ERANGE;
-	}
-
-	plane_state->visible = drm_rect_clip_scaled(src, dst, clip, hscale, vscale);
-
-	drm_rect_rotate_inv(src, fb->width << 16, fb->height << 16, rotation);
-
-	if (!plane_state->visible)
-		/*
-		 * Plane isn't visible; some drivers can handle this
-		 * so we just return success here.  Drivers that can't
-		 * (including those that use the primary plane helper's
-		 * update function) will return an error from their
-		 * update_plane handler.
-		 */
-		return 0;
-
-	if (!can_position && !drm_rect_equals(dst, clip)) {
-		DRM_DEBUG_KMS("Plane must cover entire CRTC\n");
-		drm_rect_debug_print("dst: ", dst, false);
-		drm_rect_debug_print("clip: ", clip, false);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-EXPORT_SYMBOL(drm_plane_helper_check_state);
-
 /**
  * drm_plane_helper_check_update() - Check plane update for validity
  * @plane: plane object to update
@@ -254,8 +160,8 @@ int drm_plane_helper_check_update(struct drm_plane *plane,
 	};
 	int ret;
 
-	ret = drm_plane_helper_check_state(&plane_state, &crtc_state, clip,
-					   min_scale, max_scale,
+	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
+						  clip, min_scale, max_scale,
 						  can_position,
 						  can_update_disabled);
 	if (ret)

drivers/gpu/drm/drm_simple_kms_helper.c

@@ -103,7 +103,8 @@ static int drm_simple_kms_plane_atomic_check(struct drm_plane *plane,
 	clip.x2 = crtc_state->adjusted_mode.hdisplay;
 	clip.y2 = crtc_state->adjusted_mode.vdisplay;
 
-	ret = drm_plane_helper_check_state(plane_state, crtc_state, &clip,
+	ret = drm_atomic_helper_check_plane_state(plane_state, crtc_state,
+						  &clip,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  false, true);

drivers/gpu/drm/i915/intel_display.c

@@ -9418,7 +9418,7 @@ static int intel_check_cursor(struct intel_crtc_state *crtc_state,
 	u32 offset;
 	int ret;
 
-	ret = drm_plane_helper_check_state(&plane_state->base,
+	ret = drm_atomic_helper_check_plane_state(&plane_state->base,
 						  &crtc_state->base,
 						  &plane_state->clip,
 						  DRM_PLANE_HELPER_NO_SCALING,
@@ -12842,7 +12842,7 @@ intel_check_primary_plane(struct intel_plane *plane,
 		can_position = true;
 	}
 
-	ret = drm_plane_helper_check_state(&state->base,
+	ret = drm_atomic_helper_check_plane_state(&state->base,
 						  &crtc_state->base,
 						  &state->clip,
 						  min_scale, max_scale,

drivers/gpu/drm/imx/ipuv3-plane.c

@@ -342,7 +342,7 @@ static int ipu_plane_atomic_check(struct drm_plane *plane,
 	clip.y1 = 0;
 	clip.x2 = crtc_state->adjusted_mode.hdisplay;
 	clip.y2 = crtc_state->adjusted_mode.vdisplay;
-	ret = drm_plane_helper_check_state(state, crtc_state, &clip,
+	ret = drm_atomic_helper_check_plane_state(state, crtc_state, &clip,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  can_position, true);

drivers/gpu/drm/mediatek/mtk_drm_plane.c

@@ -111,7 +111,7 @@ static int mtk_plane_atomic_check(struct drm_plane *plane,
 	clip.x2 = crtc_state->mode.hdisplay;
 	clip.y2 = crtc_state->mode.vdisplay;
 
-	return drm_plane_helper_check_state(state, crtc_state, &clip,
+	return drm_atomic_helper_check_plane_state(state, crtc_state, &clip,
 						   DRM_PLANE_HELPER_NO_SCALING,
 						   DRM_PLANE_HELPER_NO_SCALING,
 						   true, true);

drivers/gpu/drm/meson/meson_plane.c

@@ -61,7 +61,7 @@ static int meson_plane_atomic_check(struct drm_plane *plane,
 	clip.x2 = crtc_state->mode.hdisplay;
 	clip.y2 = crtc_state->mode.vdisplay;
 
-	return drm_plane_helper_check_state(state, crtc_state, &clip,
+	return drm_atomic_helper_check_plane_state(state, crtc_state, &clip,
 						   DRM_PLANE_HELPER_NO_SCALING,
 						   DRM_PLANE_HELPER_NO_SCALING,
 						   true, true);

drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c

@@ -348,8 +348,9 @@ static int mdp5_plane_atomic_check_with_state(struct drm_crtc_state *crtc_state,
 	min_scale = FRAC_16_16(1, 8);
 	max_scale = FRAC_16_16(8, 1);
 
-	ret = drm_plane_helper_check_state(state, crtc_state, &clip,
-					   min_scale, max_scale, true, true);
+	ret = drm_atomic_helper_check_plane_state(state, crtc_state, &clip,
+						  min_scale, max_scale,
+						  true, true);
 	if (ret)
 		return ret;
 

drivers/gpu/drm/nouveau/nv50_display.c

@@ -1143,7 +1143,7 @@ nv50_curs_acquire(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw,
 {
 	int ret;
 
-	ret = drm_plane_helper_check_state(&asyw->state, &asyh->state,
+	ret = drm_atomic_helper_check_plane_state(&asyw->state, &asyh->state,
 						  &asyw->clip,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  DRM_PLANE_HELPER_NO_SCALING,
@@ -1433,7 +1433,7 @@ nv50_base_acquire(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw,
 	if (!fb->format->depth)
 		return -EINVAL;
 
-	ret = drm_plane_helper_check_state(&asyw->state, &asyh->state,
+	ret = drm_atomic_helper_check_plane_state(&asyw->state, &asyh->state,
 						  &asyw->clip,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  DRM_PLANE_HELPER_NO_SCALING,

drivers/gpu/drm/rockchip/rockchip_drm_vop.c

@@ -659,7 +659,7 @@ static int vop_plane_atomic_check(struct drm_plane *plane,
 	clip.x2 = crtc_state->adjusted_mode.hdisplay;
 	clip.y2 = crtc_state->adjusted_mode.vdisplay;
 
-	ret = drm_plane_helper_check_state(state, crtc_state, &clip,
+	ret = drm_atomic_helper_check_plane_state(state, crtc_state, &clip,
 						  min_scale, max_scale,
 						  true, true);
 	if (ret)

drivers/gpu/drm/tegra/dc.c

@@ -500,7 +500,7 @@ static int tegra_plane_state_add(struct tegra_plane *plane,
 	clip.y2 = crtc_state->mode.vdisplay;
 
 	/* Check plane state for visibility and calculate clipping bounds */
-	err = drm_plane_helper_check_state(state, crtc_state, &clip,
+	err = drm_atomic_helper_check_plane_state(state, crtc_state, &clip,
 						  0, INT_MAX, true, true);
 	if (err < 0)
 		return err;

drivers/gpu/drm/vmwgfx/vmwgfx_kms.c

@@ -454,7 +454,7 @@ int vmw_du_primary_plane_atomic_check(struct drm_plane *plane,
 		clip.y2 = crtc_state->adjusted_mode.vdisplay;
 	}
 
-	ret = drm_plane_helper_check_state(state, crtc_state, &clip,
+	ret = drm_atomic_helper_check_plane_state(state, crtc_state, &clip,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  DRM_PLANE_HELPER_NO_SCALING,
 						  false, true);

drivers/gpu/drm/zte/zx_plane.c

@@ -80,8 +80,8 @@ static int zx_vl_plane_atomic_check(struct drm_plane *plane,
 	clip.x2 = crtc_state->adjusted_mode.hdisplay;
 	clip.y2 = crtc_state->adjusted_mode.vdisplay;
 
-	return drm_plane_helper_check_state(plane_state, crtc_state, &clip,
-					    min_scale, max_scale,
+	return drm_atomic_helper_check_plane_state(plane_state, crtc_state,
+						   &clip, min_scale, max_scale,
 						   true, true);
 }
 
@@ -315,7 +315,8 @@ static int zx_gl_plane_atomic_check(struct drm_plane *plane,
 	clip.x2 = crtc_state->adjusted_mode.hdisplay;
 	clip.y2 = crtc_state->adjusted_mode.vdisplay;
 
-	return drm_plane_helper_check_state(plane_state, crtc_state, &clip,
+	return drm_atomic_helper_check_plane_state(plane_state, crtc_state,
+						   &clip,
 						   DRM_PLANE_HELPER_NO_SCALING,
 						   DRM_PLANE_HELPER_NO_SCALING,
 						   false, true);

include/drm/drm_atomic_helper.h

@@ -38,6 +38,13 @@ struct drm_private_state;
 
 int drm_atomic_helper_check_modeset(struct drm_device *dev,
 				struct drm_atomic_state *state);
+int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state,
+					const struct drm_crtc_state *crtc_state,
+					const struct drm_rect *clip,
+					int min_scale,
+					int max_scale,
+					bool can_position,
+					bool can_update_disabled);
 int drm_atomic_helper_check_planes(struct drm_device *dev,
 			       struct drm_atomic_state *state);
 int drm_atomic_helper_check(struct drm_device *dev,

include/drm/drm_plane_helper.h

@@ -38,12 +38,6 @@
  */
 #define DRM_PLANE_HELPER_NO_SCALING (1<<16)
 
-int drm_plane_helper_check_state(struct drm_plane_state *plane_state,
-				 const struct drm_crtc_state *crtc_state,
-				 const struct drm_rect *clip,
-				 int min_scale, int max_scale,
-				 bool can_position,
-				 bool can_update_disabled);
 int drm_plane_helper_check_update(struct drm_plane *plane,
 				  struct drm_crtc *crtc,
 				  struct drm_framebuffer *fb,