[PATCH 1/2] drm: rcar-du: Add Z-order support for VSP planes

[Laurent Pinchart]

Make the Z-order of VSP planes configurable through the zpos property,
exactly as for the native DU planes.

Signed-off-by: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com>
---
 drivers/gpu/drm/rcar-du/rcar_du_vsp.c | 16 ++++++++++++----
 drivers/gpu/drm/rcar-du/rcar_du_vsp.h |  2 ++
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c 
b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
index de7ef041182b..62e9619eaea4 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
@@ -180,8 +180,9 @@ static void rcar_du_vsp_plane_setup(struct 
rcar_du_vsp_plane *plane)
 
        WARN_ON(!pixelformat);
 
-       vsp1_du_atomic_update(plane->vsp->vsp, plane->index, pixelformat,
-                             fb->pitches[0], paddr, &src, &dst);
+       vsp1_du_atomic_update_zpos(plane->vsp->vsp, plane->index, pixelformat,
+                                  fb->pitches[0], paddr, &src, &dst,
+                                  state->zpos);
 }
 
 static int rcar_du_vsp_plane_atomic_check(struct drm_plane *plane,
@@ -220,8 +221,8 @@ static void rcar_du_vsp_plane_atomic_update(struct 
drm_plane *plane,
        if (plane->state->crtc)
                rcar_du_vsp_plane_setup(rplane);
        else
-               vsp1_du_atomic_update(rplane->vsp->vsp, rplane->index, 0, 0, 0,
-                                     NULL, NULL);
+               vsp1_du_atomic_update_zpos(rplane->vsp->vsp, rplane->index,
+                                          0, 0, 0, NULL, NULL, 0);
 }
 
 static const struct drm_plane_helper_funcs rcar_du_vsp_plane_helper_funcs = {
@@ -269,6 +270,7 @@ 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;
 
        plane->state = &state->state;
        plane->state->plane = plane;
@@ -283,6 +285,8 @@ 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;
 
@@ -299,6 +303,8 @@ 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;
 
@@ -378,6 +384,8 @@ 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);
        }
 
        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 df3bf3805c69..510dcc9c6816 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.h
@@ -44,6 +44,7 @@ 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;
@@ -51,6 +52,7 @@ 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 *
-- 
2.7.3

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