[Intel-gfx] [PATCH 1/2] drm: Add drm_crtc_vblank_waitqueue()

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Add a small static inline helper to grab the vblank wait queue based on
the drm_crtc.

Suggested-by: Daniel Vetter <daniel at ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 include/drm/drmP.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 76ccaab..c294560 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1378,6 +1378,10 @@ 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);
 
+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);
-- 
1.8.5.5