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From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Tue, 9 May 2017 01:27:14 +0300
Subject: drm: omapdrm: Add zpos property
Git-commit: dff6c24698a4d05d9a90de97612ec520c6fa8bd8
Patch-mainline: v4.13-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Create a standard zpos property for every plane as an alias to the
omapdrm-specific zorder property. Unlike the zorder property that has to
be instantiated for both planes and CRTCs due to backward compatibility,
the zpos property is only instantiated for planes. When userspace will
have switched to the zpos property the zorder property will be removed.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/omapdrm/omap_drv.c   |    4 +++-
 drivers/gpu/drm/omapdrm/omap_plane.c |    2 ++
 2 files changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -178,8 +178,10 @@ cleanup:
 static int omap_modeset_init_properties(struct drm_device *dev)
 {
 	struct omap_drm_private *priv = dev->dev_private;
+	unsigned int num_planes = priv->dispc_ops->get_num_ovls();
 
-	priv->zorder_prop = drm_property_create_range(dev, 0, "zorder", 0, 3);
+	priv->zorder_prop = drm_property_create_range(dev, 0, "zorder", 0,
+						      num_planes - 1);
 	if (!priv->zorder_prop)
 		return -ENOMEM;
 
--- a/drivers/gpu/drm/omapdrm/omap_plane.c
+++ b/drivers/gpu/drm/omapdrm/omap_plane.c
@@ -291,6 +291,7 @@ struct drm_plane *omap_plane_init(struct
 		u32 possible_crtcs)
 {
 	struct omap_drm_private *priv = dev->dev_private;
+	unsigned int num_planes = priv->dispc_ops->get_num_ovls();
 	struct drm_plane *plane;
 	struct omap_plane *omap_plane;
 	enum omap_plane_id id;
@@ -324,6 +325,7 @@ struct drm_plane *omap_plane_init(struct
 	drm_plane_helper_add(plane, &omap_plane_helper_funcs);
 
 	omap_plane_install_properties(plane, &plane->base);
+	drm_plane_create_zpos_property(plane, 0, 0, num_planes - 1);
 
 	return plane;