From 931c670d209b64a6033c1a2857ff309eee88f9c8 Mon Sep 17 00:00:00 2001
From: Shawn Guo <shawn.guo@linaro.org>
Date: Sat, 7 Jan 2017 16:52:11 +0800
Subject: drm: add more document for drm_crtc_from_index()

Add a bit more document for function drm_crtc_from_index() to cross
link it with drm_crtc_from_index(), and explain that the function is
useful in vblank code.

While at it, add cross link comment for drm_plane_from_index() as well.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1483779131-19935-1-git-send-email-shawnguo@kernel.org
---
 drivers/gpu/drm/drm_plane.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers/gpu/drm/drm_plane.c')

diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index 7b7275f0c2df..eed66be18329 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -254,7 +254,7 @@ EXPORT_SYMBOL(drm_plane_cleanup);
  * @idx: index of registered plane to find for
  *
  * Given a plane index, return the registered plane from DRM device's
- * list of planes with matching index.
+ * list of planes with matching index. This is the inverse of drm_plane_index().
  */
 struct drm_plane *
 drm_plane_from_index(struct drm_device *dev, int idx)
-- 
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