dmesg:
[ 0.613884] rockchip-drm display-subsystem: bound ff940000.hdmi (ops 0xffffff80089762c0)
[ 0.614861] i2c i2c-10: of_i2c: modalias failure on /dp@fec00000/ports
[ 0.615565] ERROR: Bad of_node_put() on /dp@fec00000/ports/port/endpoint@0
[ 0.616219] CPU: 4 PID: 6 Comm: kworker/u12:0 Not tainted 4.4.189 #1
[ 0.616815] Hardware name: Pine64 RockPro64 (DT)
[ 0.617272] Workqueue: deferwq deferred_probe_work_func
[ 0.617778] Call trace:
[ 0.618040] [] dump_backtrace+0x0/0x1c4
[ 0.618559] [] show_stack+0x24/0x30
[ 0.619046] [] dump_stack+0x98/0xc0
[ 0.619534] [] of_node_release+0x3c/0xb0
[ 0.620058] [] kobject_put+0xa0/0xc0
[ 0.620550] [] of_node_put+0x24/0x30
[ 0.621041] [] __of_get_next_child+0x34/0x60
[ 0.621593] [] of_get_next_child+0x40/0x64
[ 0.622131] [] of_graph_get_next_endpoint+0xf0/0x134
[ 0.622746] [] drm_of_find_possible_crtcs+0x68/0xe4
[ 0.623355] [] cdn_dp_bind+0x44c/0x6e0
[ 0.623866] [] component_bind_all+0x104/0x1c8
[ 0.624429] [] rockchip_drm_bind+0x494/0x191c
[ 0.624994] [] try_to_bring_up_master.part.2+0xa0/0x114
[ 0.625633] [] component_add+0xbc/0x100
[ 0.626148] [] cdn_dp_probe+0x198/0x1b8
[ 0.626665] [] platform_drv_probe+0x5c/0xb0
[ 0.627210] [] driver_probe_device+0x188/0x26c
[ 0.627778] [] __device_attach_driver+0x68/0xa4
[ 0.628354] [] bus_for_each_drv+0x8c/0x9c
[ 0.628884] [] __device_attach+0xac/0x100
[ 0.629413] [] device_initial_probe+0x24/0x30
[ 0.629972] [] bus_probe_device+0x38/0x98
[ 0.630502] [] deferred_probe_work_func+0x8c/0xa0
[ 0.631098] [] process_one_work+0x228/0x364
[ 0.631645] [] worker_thread+0x284/0x390
[ 0.632168] [] kthread+0xe0/0xf0
[ 0.632628] [] ret_from_fork+0x10/0x20
[ 0.633800] rockchip-drm display-subsystem: bound fec00000.dp (ops 0xffffff8008977290)
rockchip-linux
