RK3568 DRM框架下的Planes无法使用问题

在使用modetest 测试的时候发现多个planes 无法使用，提示no use. 请问RK底层有相关实现或者使用上需要有注意的吗？

[root@RK3S6X:/]# modetest -P 57@S7:1280x720@NV12 *M rockchip
no unused plane available for CRTC 87
[root@RK356X:/]# modetest -P 73@S7:1280x720@NV12 -M rockchip
no unused plane available for CRTC 87
[root@«K356X：/]# modetest -P 89087:128Ox720@NV12 -M rockchip
testing 1280x720@NV12 overlay plane 89
[root@RK356X:/]# modetest -P 103@S7:1280x720@NV12 -M rockchip
no unused plane available for CRTC 87
[root@RK356x：/]# modetest -P 131@87:1280x720@NV12 -M rockchip
testing 1280x720@NV12 overlay plane 131
[970.729326] [drm:vop2_plane_atomic_check]*ERROR* Unsupported lineafailed to enable plane: Invalidr argument
format at Cluster1-win0