Revert "Revert "drm/amd/display: Implement zpos property""

This reverts commit e2066eb4efe0e7d2d329d6e6765ed637a523ac45.

The problematic IGT test case (i.e. kms_atomic@plane-immutable-zpos) has
been fixed as of commit cb77add45011 ("tests/kms_atomic: remove zpos <
N-planes assert") to the IGT repo. So, reintroduce the reverted code.

Link: https://gitlab.freedesktop.org/drm/igt-gpu-tools/-/commit/cb77add45011b129e21f3cb2a4089a73dde56179
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
index 894bc7e4fdaac0fb26f17db8f63f406e3e61c4fc..df568a7cd005c9c02090c2f72f7004fbb7fa1468 100644 (file)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
@@ -1469,6 +1469,15 @@ int amdgpu_dm_plane_init(struct amdgpu_display_manager *dm,
                drm_plane_create_blend_mode_property(plane, blend_caps);
        }
 
+       if (plane->type == DRM_PLANE_TYPE_PRIMARY) {
+               drm_plane_create_zpos_immutable_property(plane, 0);
+       } else if (plane->type == DRM_PLANE_TYPE_OVERLAY) {
+               unsigned int zpos = 1 + drm_plane_index(plane);
+               drm_plane_create_zpos_property(plane, zpos, 1, 254);
+       } else if (plane->type == DRM_PLANE_TYPE_CURSOR) {
+               drm_plane_create_zpos_immutable_property(plane, 255);
+       }
+
        if (plane->type == DRM_PLANE_TYPE_PRIMARY &&
            plane_cap &&
            (plane_cap->pixel_format_support.nv12 ||