version 4:
fix null pointer issue while setting zpos in plane reset function

This patch replaces zpos property handling custom code in rcar DRM
driver with calls to generic DRM code.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard at linaro.org>

Cc: Daniel Vetter <daniel at ffwll.ch>
Cc: Ville Syrjala <ville.syrjala at linux.intel.com>
Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Cc: Marek Szyprowski <m.szyprowski at samsung.com>
---
 drivers/gpu/drm/rcar-du/rcar_du_crtc.c  | 2 +-
 drivers/gpu/drm/rcar-du/rcar_du_drv.h   | 1 -
 drivers/gpu/drm/rcar-du/rcar_du_kms.c   | 5 -----
 drivers/gpu/drm/rcar-du/rcar_du_plane.c | 9 ++-------
 drivers/gpu/drm/rcar-du/rcar_du_plane.h | 2 --
 5 files changed, 3 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c 
b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 0d8bdda..28d2cb6 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -196,7 +196,7 @@ void rcar_du_crtc_route_output(struct drm_crtc *crtc,

 static unsigned int plane_zpos(struct rcar_du_plane *plane)
 {
-       return to_rcar_plane_state(plane->plane.state)->zpos;
+       return plane->plane.state->normalized_zpos;
 }

 static const struct rcar_du_format_info *
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h 
b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
index ed35467..c843c31 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
@@ -92,7 +92,6 @@ struct rcar_du_device {
        struct {
                struct drm_property *alpha;
                struct drm_property *colorkey;
-               struct drm_property *zpos;
        } props;

        unsigned int dpad0_source;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c 
b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index 86c109b..6a99959 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -527,11 +527,6 @@ static int rcar_du_properties_init(struct rcar_du_device 
*rcdu)
        if (rcdu->props.colorkey == NULL)
                return -ENOMEM;

-       rcdu->props.zpos =
-               drm_property_create_range(rcdu->ddev, 0, "zpos", 1, 7);
-       if (rcdu->props.zpos == NULL)
-               return -ENOMEM;
-
        return 0;
 }

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_plane.c 
b/drivers/gpu/drm/rcar-du/rcar_du_plane.c
index bfe31ca..dc9bb96 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_plane.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.c
@@ -652,7 +652,7 @@ static void rcar_du_plane_reset(struct drm_plane *plane)
        state->source = RCAR_DU_PLANE_MEMORY;
        state->alpha = 255;
        state->colorkey = RCAR_DU_COLORKEY_NONE;
-       state->zpos = plane->type == DRM_PLANE_TYPE_PRIMARY ? 0 : 1;
+       state->state.zpos = plane->type == DRM_PLANE_TYPE_PRIMARY ? 0 : 1;

        plane->state = &state->state;
        plane->state->plane = plane;
@@ -670,8 +670,6 @@ static int rcar_du_plane_atomic_set_property(struct 
drm_plane *plane,
                rstate->alpha = val;
        else if (property == rcdu->props.colorkey)
                rstate->colorkey = val;
-       else if (property == rcdu->props.zpos)
-               rstate->zpos = val;
        else
                return -EINVAL;

@@ -690,8 +688,6 @@ static int rcar_du_plane_atomic_get_property(struct 
drm_plane *plane,
                *val = rstate->alpha;
        else if (property == rcdu->props.colorkey)
                *val = rstate->colorkey;
-       else if (property == rcdu->props.zpos)
-               *val = rstate->zpos;
        else
                return -EINVAL;

@@ -763,8 +759,7 @@ int rcar_du_planes_init(struct rcar_du_group *rgrp)
                drm_object_attach_property(&plane->plane.base,
                                           rcdu->props.colorkey,
                                           RCAR_DU_COLORKEY_NONE);
-               drm_object_attach_property(&plane->plane.base,
-                                          rcdu->props.zpos, 1);
+               drm_plane_create_zpos_property(&plane->plane, 1, 7);
        }

        return 0;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_plane.h 
b/drivers/gpu/drm/rcar-du/rcar_du_plane.h
index b18b7b2..8b91dd3 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_plane.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_plane.h
@@ -51,7 +51,6 @@ static inline struct rcar_du_plane *to_rcar_plane(struct 
drm_plane *plane)
  * @hwindex: 0-based hardware plane index, -1 means unused
  * @alpha: value of the plane alpha property
  * @colorkey: value of the plane colorkey property
- * @zpos: value of the plane zpos property
  */
 struct rcar_du_plane_state {
        struct drm_plane_state state;
@@ -62,7 +61,6 @@ struct rcar_du_plane_state {

        unsigned int alpha;
        unsigned int colorkey;
-       unsigned int zpos;
 };

 static inline struct rcar_du_plane_state *
-- 
1.9.1

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