[  174.550988] ------------[ cut here ]------------
[  174.555785] WARNING: CPU: 1 PID: 171 at drivers/gpu/drm/drm_atomic_helper.c:986 drm_atomic_helper_commit_modeset_disables+0x474/0x478
[  174.568076] driver forgot to call drm_crtc_vblank_off()
[  174.573425] Modules linked in: sun8i_drm_hdmi dw_hdmi sun8i_mixer sun4i_drm sun4i_tcon
[  174.581528] CPU: 1 PID: 171 Comm: irq/41-1ee0000. Not tainted 4.15.0-rc7-next-20180112-ga2fb494c9 #1
[  174.590830] Hardware name: Allwinner sun8i Family
[  174.595646] [<c010e58c>] (unwind_backtrace) from [<c010b864>] (show_stack+0x10/0x14)
[  174.603540] [<c010b864>] (show_stack) from [<c0622a10>] (dump_stack+0x84/0x98)
[  174.610903] [<c0622a10>] (dump_stack) from [<c011b99c>] (__warn+0xfc/0x114)
[  174.617998] [<c011b99c>] (__warn) from [<c011b9ec>] (warn_slowpath_fmt+0x38/0x48)
[  174.625626] [<c011b9ec>] (warn_slowpath_fmt) from [<c03da480>] (drm_atomic_helper_commit_modeset_disables+0x474/0x478)
[  174.636521] [<c03da480>] (drm_atomic_helper_commit_modeset_disables) from [<c03da49c>] (drm_atomic_helper_commit_tail+0x18/0x64)
[  174.648297] [<c03da49c>] (drm_atomic_helper_commit_tail) from [<c03da568>] (commit_tail+0x80/0x84)
[  174.657424] [<c03da568>] (commit_tail) from [<c03da694>] (drm_atomic_helper_commit+0x120/0x124)
[  174.666287] [<c03da694>] (drm_atomic_helper_commit) from [<c03dcd9c>] (restore_fbdev_mode_atomic+0x1b4/0x210)
[  174.676390] [<c03dcd9c>] (restore_fbdev_mode_atomic) from [<c03dfd44>] (drm_fb_helper_restore_fbdev_mode_unlocked+0x54/0xa0)
[  174.687814] [<c03dfd44>] (drm_fb_helper_restore_fbdev_mode_unlocked) from [<c03dfdc0>] (drm_fb_helper_set_par+0x30/0x60)
[  174.698886] [<c03dfdc0>] (drm_fb_helper_set_par) from [<c03dfcac>] (drm_fb_helper_hotplug_event.part.8+0x98/0xb0)
[  174.709342] [<c03dfcac>] (drm_fb_helper_hotplug_event.part.8) from [<c03d0b40>] (drm_helper_hpd_irq_event+0xfc/0x108)
[  174.720159] [<c03d0b40>] (drm_helper_hpd_irq_event) from [<bf026828>] (dw_hdmi_irq+0xf8/0x8d0 [dw_hdmi])
[  174.729824] [<bf026828>] (dw_hdmi_irq [dw_hdmi]) from [<c015cdac>] (irq_thread_fn+0x1c/0x54)
[  174.738421] [<c015cdac>] (irq_thread_fn) from [<c015d074>] (irq_thread+0x12c/0x1f0)
[  174.746223] [<c015d074>] (irq_thread) from [<c0137690>] (kthread+0x120/0x150)
[  174.753498] [<c0137690>] (kthread) from [<c01010e8>] (ret_from_fork+0x14/0x2c)
[  174.760852] Exception stack(0xee6a1fb0 to 0xee6a1ff8)
[  174.765999] 1fa0:                                     00000000 00000000 00000000 00000000
[  174.774328] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  174.782656] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[  174.789412] ---[ end trace 19e10a081ef6d10e ]---