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.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 4 insertions, 98 deletions

diff --git a/drivers/gpu/drm/drm_plane_helper.c b/drivers/gpu/drm/drm_plane_helper.c
index eef0ffcd7ed5..f1be8cd4e387 100644
--- a/drivers/gpu/drm/drm_plane_helper.c
+++ b/drivers/gpu/drm/drm_plane_helper.c
@@ -100,100 +100,6 @@ static int get_connectors_for_crtc(struct drm_crtc *crtc,
 }
 
 /**
- * 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
  * @crtc: owning CRTC of owning plane
@@ -254,10 +160,10 @@ 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,
-					   can_position,
-					   can_update_disabled);
+	ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
+						  clip, min_scale, max_scale,
+						  can_position,
+						  can_update_disabled);
 	if (ret)
 		return ret;