[PATCH -v2 04/14] drm/exynos: make zpos property immutable

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.pado...@collabora.co.uk>

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 at collabora.co.uk>
---
 drivers/gpu/drm/exynos/exynos_drm_plane.c | 21 ++-------------------
 1 file 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 8292819..3847545 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_plane.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
@@ -185,27 +185,10 @@ 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,
@@ -217,8 +200,8 @@ 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;

-- 
1.9.3