drm/imx: ipuv3-plane: request modeset if plane offsets changed

If the framebuffer pixel format is planar YUV and unchanged, but the U
or V plane offsets change, do not return an error, but request a modeset
instead.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Liu Ying <gnuiyl@gmail.com>

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

@@ -356,13 +356,11 @@ static int ipu_plane_atomic_check(struct drm_plane *plane,
 		if ((ubo > 0xfffff8) || (vbo > 0xfffff8))
 			return -EINVAL;
 
-		if (old_fb &&
-		    (old_fb->pixel_format == DRM_FORMAT_YUV420 ||
-		     old_fb->pixel_format == DRM_FORMAT_YVU420)) {
+		if (old_fb && (fb->pixel_format == old_fb->pixel_format)) {
 			old_ubo = drm_plane_state_to_ubo(old_state);
 			old_vbo = drm_plane_state_to_vbo(old_state);
 			if (ubo != old_ubo || vbo != old_vbo)
-				return -EINVAL;
+				crtc_state->mode_changed = true;
 		}
 
 		if (fb->pitches[1] != fb->pitches[2])