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

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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>
Tested-by: Tomohito Esaki <etom@igel.co.jp>
This commit is contained in:
Laurent Pinchart 2022-06-07 19:33:22 +03:00
parent b7aaa61726
commit 676ad8e997
1 changed files with 3 additions and 8 deletions
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11
drivers/gpu/drm/rcar-du/rcar_du_vsp.c
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@ -433,14 +433,9 @@ 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++;
}