drm/exynos: make zpos property immutable

We already set each plane zpos at init, after that changes to zpos are
not expected. This patch turns zpos into a read-only property so now it is
impossible to set zpos.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

1 files changed, 2 insertions, 19 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.c b/drivers/gpu/drm/exynos/exynos_drm_plane.c
index cee980e86fcd..d8bb6a1040ef 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_plane.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
@@ -184,27 +184,10 @@ static void exynos_plane_destroy(struct drm_plane *plane)
         drm_plane_cleanup(plane);
 }
 
-static int exynos_plane_set_property(struct drm_plane *plane,
-                                     struct drm_property *property,
-                                     uint64_t val)
-{
-        struct drm_device *dev = plane->dev;
-        struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
-        struct exynos_drm_private *dev_priv = dev->dev_private;
-
-        if (property == dev_priv->plane_zpos_property) {
-                exynos_plane->zpos = val;
-                return 0;
-        }
-
-        return -EINVAL;
-}
-
 static struct drm_plane_funcs exynos_plane_funcs = {
         .update_plane   = exynos_update_plane,
         .disable_plane  = exynos_disable_plane,
         .destroy        = exynos_plane_destroy,
-        .set_property   = exynos_plane_set_property,
 };
 
 static void exynos_plane_attach_zpos_property(struct drm_plane *plane,
@@ -216,8 +199,8 @@ static void exynos_plane_attach_zpos_property(struct drm_plane *plane,
 
         prop = dev_priv->plane_zpos_property;
         if (!prop) {
-                prop = drm_property_create_range(dev, 0, "zpos", 0,
-                                                 MAX_PLANE - 1);
+                prop = drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE,
+                                                 "zpos", 0, MAX_PLANE - 1);
                 if (!prop)
                         return;