Merge tag 'drm-intel-next-2014-08-08' of git://anongit.freedesktop.org/drm-intel...

[linux-2.6-microblaze.git] / include / drm / drmP.h

diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index d2f64b9..6b4fbf3 100644 (file)
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1313,6 +1313,17 @@ extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
                                            const struct drm_display_mode *mode);
 
+/**
+ * drm_crtc_vblank_waitqueue - get vblank waitqueue for the CRTC
+ * @crtc: which CRTC's vblank waitqueue to retrieve
+ *
+ * This function returns a pointer to the vblank waitqueue for the CRTC.
+ * Drivers can use this to implement vblank waits using wait_event() & co.
+ */
+static inline wait_queue_head_t *drm_crtc_vblank_waitqueue(struct drm_crtc *crtc)
+{
+       return &crtc->dev->vblank[drm_crtc_index(crtc)].queue;
+}
 
 /* Modesetting support */
 extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);