diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 8ce2a0c59116..ebb7e1d1778c 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -312,6 +312,9 @@ static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_
 	case DRM_CAP_ADDFB2_MODIFIERS:
 		req->value = dev->mode_config.allow_fb_modifiers;
 		break;
+	case DRM_CAP_CRTC_IN_VBLANK_EVENT:
+		req->value = 1;
+		break;
 	default:
 		return -EINVAL;
 	}
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 4ddbc49125cd..c960b9f4bc5d 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -1098,6 +1098,7 @@ EXPORT_SYMBOL(drm_arm_vblank_event);
 void drm_crtc_arm_vblank_event(struct drm_crtc *crtc,
 			       struct drm_pending_vblank_event *e)
 {
+	e->event.crtc_id = crtc->base.id;
 	drm_arm_vblank_event(crtc->dev, drm_crtc_index(crtc), e);
 }
 EXPORT_SYMBOL(drm_crtc_arm_vblank_event);
@@ -1144,6 +1145,7 @@ EXPORT_SYMBOL(drm_send_vblank_event);
 void drm_crtc_send_vblank_event(struct drm_crtc *crtc,
 				struct drm_pending_vblank_event *e)
 {
+	e->event.crtc_id = crtc->base.id;
 	drm_send_vblank_event(crtc->dev, drm_crtc_index(crtc), e);
 }
 EXPORT_SYMBOL(drm_crtc_send_vblank_event);
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index 24c76d138317..e127ac05cdb0 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -639,6 +639,7 @@ struct drm_gem_open {
 #define DRM_CAP_CURSOR_WIDTH		0x8
 #define DRM_CAP_CURSOR_HEIGHT		0x9
 #define DRM_CAP_ADDFB2_MODIFIERS	0x10
+#define DRM_CAP_CRTC_IN_VBLANK_EVENT	0x12
 
 /** DRM_IOCTL_GET_CAP ioctl argument type */
 struct drm_get_cap {
@@ -842,7 +843,7 @@ struct drm_event_vblank {
 	__u32 tv_sec;
 	__u32 tv_usec;
 	__u32 sequence;
-	__u32 reserved;
+	__u32 crtc_id; /* 0 on older kernels that do not support this */
 };
 
 /* typedef area */