}
 }
 
-static struct exynos_drm_crtc_ops decon_crtc_ops = {
+static const struct exynos_drm_crtc_ops decon_crtc_ops = {
        .dpms = decon_dpms,
        .mode_fixup = decon_mode_fixup,
        .commit = decon_commit,
 
 };
 
 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
-                                              struct drm_plane *plane,
-                                              int pipe,
-                                              enum exynos_drm_output_type type,
-                                              struct exynos_drm_crtc_ops *ops,
-                                              void *ctx)
+                                       struct drm_plane *plane,
+                                       int pipe,
+                                       enum exynos_drm_output_type type,
+                                       const struct exynos_drm_crtc_ops *ops,
+                                       void *ctx)
 {
        struct exynos_drm_crtc *exynos_crtc;
        struct exynos_drm_private *private = drm_dev->dev_private;
 
 #include "exynos_drm_drv.h"
 
 struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
-                                              struct drm_plane *plane,
-                                              int pipe,
-                                              enum exynos_drm_output_type type,
-                                              struct exynos_drm_crtc_ops *ops,
-                                              void *context);
+                                       struct drm_plane *plane,
+                                       int pipe,
+                                       enum exynos_drm_output_type type,
+                                       const struct exynos_drm_crtc_ops *ops,
+                                       void *context);
 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int pipe);
 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int pipe);
 void exynos_drm_crtc_finish_pageflip(struct drm_device *dev, int pipe);
 
        unsigned int                    dpms;
        wait_queue_head_t               pending_flip_queue;
        struct drm_pending_vblank_event *event;
-       struct exynos_drm_crtc_ops      *ops;
+       const struct exynos_drm_crtc_ops        *ops;
        void                            *ctx;
 };
 
 
        writel(DP_MIE_CLK_DP_ENABLE, ctx->regs + DP_MIE_CLKCON);
 }
 
-static struct exynos_drm_crtc_ops fimd_crtc_ops = {
+static const struct exynos_drm_crtc_ops fimd_crtc_ops = {
        .dpms = fimd_dpms,
        .mode_fixup = fimd_mode_fixup,
        .commit = fimd_commit,
 
        return 0;
 }
 
-static struct exynos_drm_crtc_ops vidi_crtc_ops = {
+static const struct exynos_drm_crtc_ops vidi_crtc_ops = {
        .dpms = vidi_dpms,
        .enable_vblank = vidi_enable_vblank,
        .disable_vblank = vidi_disable_vblank,
 
        return -EINVAL;
 }
 
-static struct exynos_drm_crtc_ops mixer_crtc_ops = {
+static const struct exynos_drm_crtc_ops mixer_crtc_ops = {
        .dpms                   = mixer_dpms,
        .enable_vblank          = mixer_enable_vblank,
        .disable_vblank         = mixer_disable_vblank,