diff --git a/include/drm/drm.h b/include/drm/drm.h
index 5408c08c..48221599 100644
--- a/include/drm/drm.h
+++ b/include/drm/drm.h
@@ -697,6 +697,7 @@ struct drm_gem_open {
 #define DRM_IOCTL_MODE_ADDFB		DRM_IOWR(0xAE, struct drm_mode_fb_cmd)
 #define DRM_IOCTL_MODE_RMFB		DRM_IOWR(0xAF, unsigned int)
 #define DRM_IOCTL_MODE_PAGE_FLIP	DRM_IOWR(0xB0, struct drm_mode_crtc_page_flip)
+#define DRM_IOCTL_MODE_DIRTYFB		DRM_IOWR(0xB1, struct drm_mode_fb_dirty_cmd)
 
 /*@}*/
 
diff --git a/include/drm/drm_mode.h b/include/drm/drm_mode.h
index 1fd30266..dfc390ea 100644
--- a/include/drm/drm_mode.h
+++ b/include/drm/drm_mode.h
@@ -222,6 +222,45 @@ struct drm_mode_fb_cmd {
 	__u32 handle;
 };
 
+#define DRM_MODE_FB_DIRTY_ANNOTATE_COPY 0x01
+#define DRM_MODE_FB_DIRTY_ANNOTATE_FILL 0x02
+#define DRM_MODE_FB_DIRTY_FLAGS         0x03
+
+/*
+ * Mark a region of a framebuffer as dirty.
+ *
+ * Some hardware does not automatically update display contents
+ * as a hardware or software draw to a framebuffer. This ioctl
+ * allows userspace to tell the kernel and the hardware what
+ * regions of the framebuffer have changed.
+ *
+ * The kernel or hardware is free to update more then just the
+ * region specified by the clip rects. The kernel or hardware
+ * may also delay and/or coalesce several calls to dirty into a
+ * single update.
+ *
+ * Userspace may annotate the updates, the annotates are a
+ * promise made by the caller that the change is either a copy
+ * of pixels or a fill of a single color in the region specified.
+ *
+ * If the DRM_MODE_FB_DIRTY_ANNOTATE_COPY flag is given then
+ * the number of updated regions are half of num_clips given,
+ * where the clip rects are paired in src and dst. The width and
+ * height of each one of the pairs must match.
+ *
+ * If the DRM_MODE_FB_DIRTY_ANNOTATE_FILL flag is given the caller
+ * promises that the region specified of the clip rects is filled
+ * completely with a single color as given in the color argument.
+ */
+
+struct drm_mode_fb_dirty_cmd {
+	__u32 fb_id;
+	__u32 flags;
+	__u32 color;
+	__u32 num_clips;
+	__u64 clips_ptr;
+};
+
 struct drm_mode_mode_cmd {
 	__u32 connector_id;
 	struct drm_mode_modeinfo mode;
diff --git a/xf86drmMode.c b/xf86drmMode.c
index 317aa47f..ca36b71b 100644
--- a/xf86drmMode.c
+++ b/xf86drmMode.c
@@ -241,6 +241,18 @@ drmModeFBPtr drmModeGetFB(int fd, uint32_t buf)
 	return r;
 }
 
+int drmModeDirtyFB(int fd, uint32_t bufferId,
+		   drmModeClipPtr clips, uint32_t num_clips)
+{
+	struct drm_mode_fb_dirty_cmd dirty = { 0 };
+
+	dirty.fb_id = bufferId;
+	dirty.clips_ptr = VOID2U64(clips);
+	dirty.num_clips = num_clips;
+
+	return drmIoctl(fd, DRM_IOCTL_MODE_DIRTYFB, &dirty);
+}
+
 
 /*
  * Crtc functions
diff --git a/xf86drmMode.h b/xf86drmMode.h
index 705369fe..5a4ce637 100644
--- a/xf86drmMode.h
+++ b/xf86drmMode.h
@@ -145,6 +145,17 @@
 
 #endif /* _DRM_MODE_H */
 
+
+/*
+ * Feature defines
+ *
+ * Just because these are defined doesn't mean that the kernel
+ * can do that feature, its just for new code vs old libdrm.
+ */
+#define DRM_MODE_FEATURE_KMS		1
+#define DRM_MODE_FEATURE_DIRTYFB	1
+
+
 typedef struct _drmModeRes {
 
 	int count_fbs;
@@ -185,6 +196,8 @@ typedef struct _drmModeFB {
 	uint32_t handle;
 } drmModeFB, *drmModeFBPtr;
 
+typedef struct drm_clip_rect drmModeClip, *drmModeClipPtr;
+
 typedef struct _drmModePropertyBlob {
 	uint32_t id;
 	uint32_t length;
@@ -293,6 +306,13 @@ extern int drmModeAddFB(int fd, uint32_t width, uint32_t height, uint8_t depth,
  */
 extern int drmModeRmFB(int fd, uint32_t bufferId);
 
+/**
+ * Mark a region of a framebuffer as dirty.
+ */
+extern int drmModeDirtyFB(int fd, uint32_t bufferId,
+			  drmModeClipPtr clips, uint32_t num_clips);
+
+
 /*
  * Crtc functions
  */