[PATCH 3/3] drm: rockchip: use crtc helper drm_crtc_from_index()

[Shawn Guo]

From: Shawn Guo <shawn....@linaro.org>

Function rockchip_crtc_from_pipe() does the exactly same thing as what
crtc helper drm_crtc_from_index() provides.  Use the helper to save
some code.

Signed-off-by: Shawn Guo <shawn.guo at linaro.org>
---
 drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 17 ++---------------
 1 file changed, 2 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c 
b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index 2390c8577617..c30d649cb147 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -99,24 +99,11 @@ void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
        priv->crtc_funcs[pipe] = NULL;
 }

-static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
-                                               int pipe)
-{
-       struct drm_crtc *crtc;
-       int i = 0;
-
-       list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
-               if (i++ == pipe)
-                       return crtc;
-
-       return NULL;
-}
-
 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
                                           unsigned int pipe)
 {
        struct rockchip_drm_private *priv = dev->dev_private;
-       struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
+       struct drm_crtc *crtc = drm_crtc_from_index(dev, pipe);

        if (crtc && priv->crtc_funcs[pipe] &&
            priv->crtc_funcs[pipe]->enable_vblank)
@@ -129,7 +116,7 @@ static void rockchip_drm_crtc_disable_vblank(struct 
drm_device *dev,
                                             unsigned int pipe)
 {
        struct rockchip_drm_private *priv = dev->dev_private;
-       struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
+       struct drm_crtc *crtc = drm_crtc_from_index(dev, pipe);

        if (crtc && priv->crtc_funcs[pipe] &&
            priv->crtc_funcs[pipe]->enable_vblank)
-- 
1.9.1