drm/rockchip: vop: report error when check resource error

The user would be confused while facing a error commit without
any error report.

Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
Reviewed-by: Sandy huang <sandy.huang@rock-chips.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1501494596-7090-1-git-send-email-mark.yao@rock-chips.com

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index e205c5cf9019..2900f1410d95 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -679,8 +679,10 @@ static int vop_plane_atomic_check(struct drm_plane *plane,
          * Src.x1 can be odd when do clip, but yuv plane start point
          * need align with 2 pixel.
          */
-        if (is_yuv_support(fb->format->format) && ((state->src.x1 >> 16) % 2))
+        if (is_yuv_support(fb->format->format) && ((state->src.x1 >> 16) % 2)) {
+                DRM_ERROR("Invalid Source: Yuv format not support odd xpos\n");
                 return -EINVAL;
+        }
 
         return 0;
 }