diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index c2cb2c80f945..ef26eb28364a 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -719,6 +719,7 @@ void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags)
 	if ((p == NULL) || ((p->type & DRM_MODE_TYPE_CRTC_C) == DRM_MODE_TYPE_BUILTIN))
 		return;
 
+	p->crtc_clock = p->clock;
 	p->crtc_hdisplay = p->hdisplay;
 	p->crtc_hsync_start = p->hsync_start;
 	p->crtc_hsync_end = p->hsync_end;
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 8e9716e362e1..73478bc8f9ee 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -156,6 +156,7 @@ struct drm_display_mode {
 	int height_mm;
 
 	/* Actual mode we give to hw */
+	int crtc_clock;		/* in KHz */
 	int crtc_hdisplay;
 	int crtc_hblank_start;
 	int crtc_hblank_end;