drm/i915: Relocate SKL+ NV12 src width w/a

The SKL+ NV12 src width alignment w/a is still living in an odd place.
Everything else was already relocated closer to the main plane check
function. Move this workaround as well.

As a bonus we avoid the funky rotated vs. not mess with the src
coordinates as this now gets checked before we rotate the coordinates.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181018195921.9898-1-ville.syrjala@linux.intel.com
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

drivers/gpu/drm/i915/intel_display.c

@@ -3049,28 +3049,6 @@ static int skl_check_main_surface(struct intel_plane_state *plane_state)
 	return 0;
 }
 
-static int
-skl_check_nv12_surface(struct intel_plane_state *plane_state)
-{
-	/* Display WA #1106 */
-	if (plane_state->base.rotation !=
-	    (DRM_MODE_REFLECT_X | DRM_MODE_ROTATE_90) &&
-	    plane_state->base.rotation != DRM_MODE_ROTATE_270)
-		return 0;
-
-	/*
-	 * src coordinates are rotated here.
-	 * We check height but report it as width
-	 */
-	if (((drm_rect_height(&plane_state->base.src) >> 16) % 4) != 0) {
-		DRM_DEBUG_KMS("src width must be multiple "
-			      "of 4 for rotated NV12\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
 static int skl_check_nv12_aux_surface(struct intel_plane_state *plane_state)
 {
 	const struct drm_framebuffer *fb = plane_state->base.fb;
@@ -3153,9 +3131,6 @@ int skl_check_plane_surface(struct intel_plane_state *plane_state)
 	 * the main surface setup depends on it.
 	 */
 	if (fb->format->format == DRM_FORMAT_NV12) {
-		ret = skl_check_nv12_surface(plane_state);
-		if (ret)
-			return ret;
 		ret = skl_check_nv12_aux_surface(plane_state);
 		if (ret)
 			return ret;

drivers/gpu/drm/i915/intel_sprite.c

@@ -1342,6 +1342,23 @@ static int skl_plane_check_dst_coordinates(const struct intel_crtc_state *crtc_s
 	return 0;
 }
 
+static int skl_plane_check_nv12_rotation(const struct intel_plane_state *plane_state)
+{
+	const struct drm_framebuffer *fb = plane_state->base.fb;
+	unsigned int rotation = plane_state->base.rotation;
+	int src_w = drm_rect_width(&plane_state->base.src) >> 16;
+
+	/* Display WA #1106 */
+	if (fb->format->format == DRM_FORMAT_NV12 && src_w & 3 &&
+	    (rotation == DRM_MODE_ROTATE_270 ||
+	     rotation == (DRM_MODE_REFLECT_X | DRM_MODE_ROTATE_90))) {
+		DRM_DEBUG_KMS("src width must be multiple of 4 for rotated NV12\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static int skl_plane_check(struct intel_crtc_state *crtc_state,
 			   struct intel_plane_state *plane_state)
 {
@@ -1380,6 +1397,10 @@ static int skl_plane_check(struct intel_crtc_state *crtc_state,
 	if (ret)
 		return ret;
 
+	ret = skl_plane_check_nv12_rotation(plane_state);
+	if (ret)
+		return ret;
+
 	ret = skl_check_plane_surface(plane_state);
 	if (ret)
 		return ret;