[PATCH 1/6] drm: exynos: use crtc helper drm_crtc_from_index()

[Shawn Guo]

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

Use drm_crtc_from_index() to find drm_crtc for given index, so that we
do not need to maintain a pointer array in struct exynos_drm_private.

Signed-off-by: Shawn Guo <shawn.guo at linaro.org>
Cc: Inki Dae <inki.dae at samsung.com>
---
 drivers/gpu/drm/exynos/exynos_drm_crtc.c |  6 ------
 drivers/gpu/drm/exynos/exynos_drm_drv.h  | 10 ++--------
 2 files changed, 2 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c 
b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index 2530bf57716a..309c8ee52524 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -109,9 +109,6 @@ static void exynos_crtc_atomic_flush(struct drm_crtc *crtc,
 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
 {
        struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
-       struct exynos_drm_private *private = crtc->dev->dev_private;
-
-       private->crtc[exynos_crtc->pipe] = NULL;

        drm_crtc_cleanup(crtc);
        kfree(exynos_crtc);
@@ -134,7 +131,6 @@ struct exynos_drm_crtc *exynos_drm_crtc_create(struct 
drm_device *drm_dev,
                                        void *ctx)
 {
        struct exynos_drm_crtc *exynos_crtc;
-       struct exynos_drm_private *private = drm_dev->dev_private;
        struct drm_crtc *crtc;
        int ret;

@@ -149,8 +145,6 @@ struct exynos_drm_crtc *exynos_drm_crtc_create(struct 
drm_device *drm_dev,

        crtc = &exynos_crtc->base;

-       private->crtc[pipe] = crtc;
-
        ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL,
                                        &exynos_crtc_funcs, NULL);
        if (ret < 0)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h 
b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index 80c4d5b81689..cf6e08cb35a7 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -211,12 +211,6 @@ struct drm_exynos_file_private {
 struct exynos_drm_private {
        struct drm_fb_helper *fb_helper;

-       /*
-        * created crtc object would be contained at this array and
-        * this array is used to be aware of which crtc did it request vblank.
-        */
-       struct drm_crtc *crtc[MAX_CRTC];
-
        struct device *dma_dev;
        void *mapping;

@@ -231,9 +225,9 @@ struct exynos_drm_private {
 static inline struct exynos_drm_crtc *
 exynos_drm_crtc_from_pipe(struct drm_device *dev, int pipe)
 {
-       struct exynos_drm_private *private = dev->dev_private;
+       struct drm_crtc *crtc = drm_crtc_from_index(dev, pipe);

-       return to_exynos_crtc(private->crtc[pipe]);
+       return to_exynos_crtc(crtc);
 }

 static inline struct device *to_dma_dev(struct drm_device *dev)
-- 
1.9.1