From: Benjamin Gaignard <benjamin.gaign...@linaro.org>

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>
Signed-off--by: Laurent Pinchart <laurent.pinchart at ideasonboard.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 --
 drivers/gpu/drm/rcar-du/rcar_du_vsp.c   | 13 ++++---------
 drivers/gpu/drm/rcar-du/rcar_du_vsp.h   |  2 --
 7 files changed, 7 insertions(+), 27 deletions(-)

Hi Benjamin,

(Trimming down the CC list of bit as most people are not interested in the
rcar-du-drm details)

I've rebased your zpos series on top of

        git://linuxtv.org/media_tree.git vsp1

that includes two patches for the rcar-du-drm driver that conflict with your
series. The branch will be pushed as-is to Linus in v4.8 by Mauro, and can
thus be merged by Dave in his tree. This patch is the result of the rebase.

I haven't added my Tested-by tag yet as patch 1/4 in your series causes issues
with rcar-du-drm. I'll retest the whole series when a fix will be available.

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c 
b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 0d8bdda736f9..28d2cb633c22 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 ed35467d96cf..c843c3134498 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 86c109b16876..6a99959ee76c 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 bfe31ca870cc..dc9bb96241af 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 b18b7b25dbfa..8b91dd3a46e4 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 *
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c 
b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
index 6ac717f2056f..4255e820efca 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
@@ -43,12 +43,12 @@ void rcar_du_vsp_enable(struct rcar_du_crtc *crtc)
                        .src_y = 0,
                        .src_w = mode->hdisplay << 16,
                        .src_h = mode->vdisplay << 16,
+                       .zpos = 0,
                },
                .format = rcar_du_format_info(DRM_FORMAT_ARGB8888),
                .source = RCAR_DU_PLANE_VSPD1,
                .alpha = 255,
                .colorkey = 0,
-               .zpos = 0,
        };

        if (rcdu->info->gen >= 3)
@@ -152,7 +152,7 @@ static void rcar_du_vsp_plane_setup(struct 
rcar_du_vsp_plane *plane)
                .pixelformat = 0,
                .pitch = fb->pitches[0],
                .alpha = state->alpha,
-               .zpos = state->zpos,
+               .zpos = state->state.zpos,
        };
        unsigned int i;

@@ -267,7 +267,7 @@ static void rcar_du_vsp_plane_reset(struct drm_plane *plane)
                return;

        state->alpha = 255;
-       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;
@@ -282,8 +282,6 @@ static int rcar_du_vsp_plane_atomic_set_property(struct 
drm_plane *plane,

        if (property == rcdu->props.alpha)
                rstate->alpha = val;
-       else if (property == rcdu->props.zpos)
-               rstate->zpos = val;
        else
                return -EINVAL;

@@ -300,8 +298,6 @@ static int rcar_du_vsp_plane_atomic_get_property(struct 
drm_plane *plane,

        if (property == rcdu->props.alpha)
                *val = rstate->alpha;
-       else if (property == rcdu->props.zpos)
-               *val = rstate->zpos;
        else
                return -EINVAL;

@@ -381,8 +377,7 @@ int rcar_du_vsp_init(struct rcar_du_vsp *vsp)

                drm_object_attach_property(&plane->plane.base,
                                           rcdu->props.alpha, 255);
-               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_vsp.h 
b/drivers/gpu/drm/rcar-du/rcar_du_vsp.h
index 510dcc9c6816..df3bf3805c69 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.h
@@ -44,7 +44,6 @@ static inline struct rcar_du_vsp_plane 
*to_rcar_vsp_plane(struct drm_plane *p)
  * @state: base DRM plane state
  * @format: information about the pixel format used by the plane
  * @alpha: value of the plane alpha property
- * @zpos: value of the plane zpos property
  */
 struct rcar_du_vsp_plane_state {
        struct drm_plane_state state;
@@ -52,7 +51,6 @@ struct rcar_du_vsp_plane_state {
        const struct rcar_du_format_info *format;

        unsigned int alpha;
-       unsigned int zpos;
 };

 static inline struct rcar_du_vsp_plane_state *
-- 
Regards,

Laurent Pinchart

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