From 0c8a736544c30912e2ca7b5e4e24a36fc18072f1 Mon Sep 17 00:00:00 2001
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Sun, 7 Mar 2021 02:56:58 +0200
Subject: drm: xlnx: zynqmp_dpsub: Expose plane ordering to userspace
Git-commit: 8c772f0b2b8e94bfd68f9bf19d7aba293332e4bf
Patch-mainline: v5.15-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

While the DPSUB has a fixed plane order, it still makes sense to expose
it to userspace to avoid hardcoding assumptions. Do so by adding an
immutable zpos property to planes.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/xlnx/zynqmp_disp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c
index d87af7cb3340..e377974f8198 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_disp.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
@@ -1252,6 +1252,7 @@ static int zynqmp_disp_create_planes(struct zynqmp_disp *disp)
 		drm_plane_helper_add(&layer->plane,
 				     &zynqmp_disp_plane_helper_funcs);
 
+		drm_plane_create_zpos_immutable_property(&layer->plane, i);
 		if (zynqmp_disp_layer_is_gfx(layer))
 			drm_plane_create_alpha_property(&layer->plane);
 	}
-- 
2.38.1