[PATCH] drm: rcar-du: Lift z-pos restriction on primary plane for Gen3

[Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>]

There's no reason to require the primary plane to always be at the
bottom of the stack, as the VSP supports arbitrary ordering of planes,
and the KMS API doesn't have such a requirement either. Lift the
restriction.

As the primary plane can now be positioned arbitrarily, enable control
of its alpha channel as well.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/gpu/drm/rcar-du/rcar_du_vsp.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
index 6b535abd799a..356861de17b0 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
@@ -431,14 +431,9 @@ int rcar_du_vsp_init(struct rcar_du_vsp *vsp, struct device_node *np,
 		drm_plane_helper_add(&plane->plane,
 				     &rcar_du_vsp_plane_helper_funcs);
 
-		if (type == DRM_PLANE_TYPE_PRIMARY) {
-			drm_plane_create_zpos_immutable_property(&plane->plane,
-								 0);
-		} else {
-			drm_plane_create_alpha_property(&plane->plane);
-			drm_plane_create_zpos_property(&plane->plane, 1, 1,
-						       num_planes - 1);
-		}
+		drm_plane_create_alpha_property(&plane->plane);
+		drm_plane_create_zpos_property(&plane->plane, i, 0,
+					       num_planes - 1);
 
 		vsp->num_planes++;
 	}

base-commit: f2906aa863381afb0015a9eb7fefad885d4e5a56
-- 
Regards,

Laurent Pinchart