1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index 07c5d2a0bdc0..ac004a3288da 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -155,6 +155,12 @@ static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
 
         DRM_DEBUG_KMS("%s\n", __FILE__);
 
+        /* when framebuffer changing is requested, crtc's dpms should be on */
+        if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
+                DRM_ERROR("failed framebuffer changing request.\n");
+                return -EPERM;
+        }
+
         crtc_w = crtc->fb->width - x;
         crtc_h = crtc->fb->height - y;