[33511.822289] ------------[ cut here ]------------
[33511.822333] WARNING: CPU: 3 PID: 307 at drivers/gpu/drm/sun4i/sun4i_crtc.c:57 sun4i_crtc_atomic_begin+0x7c/0x80 [sun4i_tcon]
[33511.822337] Modules linked in: joydev hid_cherry cmac bnep btusb btrtl btbcm btintel bluetooth drbg ansi_cprng ecdh_generic rfkill snd_soc_hdmi_codec snd_soc_core snd_pcm_dmaengine snd_pcm snd_timer snd soundcore dw_hdmi_cec dw_hdmi_i2s_audio hid_generic usbhid hid asix usbnet sun8i_drm_hdmi mii dw_hdmi cec sun8i_mixer sunxi_cir rc_core sun4i_drm sun4i_tcon sunxi_wdt drm_kms_helper evdev sun6i_dma leds_gpio drm cpufreq_dt ip_tables x_tables autofs4 crc32c_generic ext4 crc16 mbcache jbd2 fscrypto ohci_platform ehci_platform ohci_hcd ehci_hcd sunxi_mmc usbcore phy_sun4i_usb
[33511.822498] CPU: 3 PID: 307 Comm: Xorg Not tainted 4.15.5+ #22
[33511.822502] Hardware name: Allwinner sun8i Family
[33511.822533] [<c0238950>] (unwind_backtrace) from [<c0232658>] (show_stack+0x20/0x24)
[33511.822550] [<c0232658>] (show_stack) from [<c09c37cc>] (dump_stack+0x90/0xa4)
[33511.822565] [<c09c37cc>] (dump_stack) from [<c0273db4>] (__warn+0x104/0x11c)
[33511.822577] [<c0273db4>] (__warn) from [<c0273f04>] (warn_slowpath_null+0x50/0x58)
[33511.822591] [<c0273f04>] (warn_slowpath_null) from [<bf3ee1c8>] (sun4i_crtc_atomic_begin+0x7c/0x80 [sun4i_tcon])
[33511.822663] [<bf3ee1c8>] (sun4i_crtc_atomic_begin [sun4i_tcon]) from [<bf372d90>] (drm_atomic_helper_commit_planes+0x94/0x2b0 [drm_kms_helper])
[33511.822703] [<bf372d90>] (drm_atomic_helper_commit_planes [drm_kms_helper]) from [<bf377238>] (drm_atomic_helper_commit_tail+0x38/0x74 [drm_kms_helper])
[33511.822740] [<bf377238>] (drm_atomic_helper_commit_tail [drm_kms_helper]) from [<bf3772ec>] (commit_tail+0x78/0x7c [drm_kms_helper])
[33511.822776] [<bf3772ec>] (commit_tail [drm_kms_helper]) from [<bf3773dc>] (drm_atomic_helper_commit+0xcc/0x138 [drm_kms_helper])
[33511.822905] [<bf3773dc>] (drm_atomic_helper_commit [drm_kms_helper]) from [<bf2cd7bc>] (drm_atomic_commit+0x5c/0x68 [drm])
[33511.822985] [<bf2cd7bc>] (drm_atomic_commit [drm]) from [<bf2ceb04>] (drm_atomic_connector_commit_dpms+0xf8/0x108 [drm])
[33511.823059] [<bf2ceb04>] (drm_atomic_connector_commit_dpms [drm]) from [<bf2d46e8>] (drm_mode_obj_set_property_ioctl+0x214/0x318 [drm])
[33511.823133] [<bf2d46e8>] (drm_mode_obj_set_property_ioctl [drm]) from [<bf2d2f44>] (drm_mode_connector_property_set_ioctl+0x58/0x74 [drm])
[33511.823205] [<bf2d2f44>] (drm_mode_connector_property_set_ioctl [drm]) from [<bf2bac78>] (drm_ioctl_kernel+0x78/0xb8 [drm])
[33511.823276] [<bf2bac78>] (drm_ioctl_kernel [drm]) from [<bf2bb030>] (drm_ioctl+0x1b8/0x3a8 [drm])
[33511.823321] [<bf2bb030>] (drm_ioctl [drm]) from [<c0460418>] (do_vfs_ioctl+0xc0/0x834)
[33511.823336] [<c0460418>] (do_vfs_ioctl) from [<c0460c08>] (SyS_ioctl+0x7c/0x8c)
[33511.823350] [<c0460c08>] (SyS_ioctl) from [<c022db40>] (ret_fast_syscall+0x0/0x4c)
[33511.823356] ---[ end trace 2cf9711fc88327fb ]---
[33512.053208] ------------[ cut here ]------------
[33512.053321] WARNING: CPU: 3 PID: 307 at drivers/gpu/drm/drm_vblank.c:1013 drm_vblank_put+0xe8/0xf8 [drm]
[33512.053325] Modules linked in: joydev hid_cherry cmac bnep btusb btrtl btbcm btintel bluetooth drbg ansi_cprng ecdh_generic rfkill snd_soc_hdmi_codec snd_soc_core snd_pcm_dmaengine snd_pcm snd_timer snd soundcore dw_hdmi_cec dw_hdmi_i2s_audio hid_generic usbhid hid asix usbnet sun8i_drm_hdmi mii dw_hdmi cec sun8i_mixer sunxi_cir rc_core sun4i_drm sun4i_tcon sunxi_wdt drm_kms_helper evdev sun6i_dma leds_gpio drm cpufreq_dt ip_tables x_tables autofs4 crc32c_generic ext4 crc16 mbcache jbd2 fscrypto ohci_platform ehci_platform ohci_hcd ehci_hcd sunxi_mmc usbcore phy_sun4i_usb
[33512.053479] CPU: 3 PID: 307 Comm: Xorg Tainted: G        W        4.15.5+ #22
[33512.053483] Hardware name: Allwinner sun8i Family
[33512.053512] [<c0238950>] (unwind_backtrace) from [<c0232658>] (show_stack+0x20/0x24)
[33512.053528] [<c0232658>] (show_stack) from [<c09c37cc>] (dump_stack+0x90/0xa4)
[33512.053543] [<c09c37cc>] (dump_stack) from [<c0273db4>] (__warn+0x104/0x11c)
[33512.053554] [<c0273db4>] (__warn) from [<c0273f04>] (warn_slowpath_null+0x50/0x58)
[33512.053601] [<c0273f04>] (warn_slowpath_null) from [<bf2da1e8>] (drm_vblank_put+0xe8/0xf8 [drm])
[33512.053677] [<bf2da1e8>] (drm_vblank_put [drm]) from [<bf2da218>] (drm_crtc_vblank_put+0x20/0x24 [drm])
[33512.053765] [<bf2da218>] (drm_crtc_vblank_put [drm]) from [<bf375c28>] (drm_atomic_helper_wait_for_vblanks.part.1+0x158/0x2c8 [drm_kms_helper])
[33512.053804] [<bf375c28>] (drm_atomic_helper_wait_for_vblanks.part.1 [drm_kms_helper]) from [<bf377264>] (drm_atomic_helper_commit_tail+0x64/0x74 [drm_kms_helper])
[33512.053840] [<bf377264>] (drm_atomic_helper_commit_tail [drm_kms_helper]) from [<bf3772ec>] (commit_tail+0x78/0x7c [drm_kms_helper])
[33512.053876] [<bf3772ec>] (commit_tail [drm_kms_helper]) from [<bf3773dc>] (drm_atomic_helper_commit+0xcc/0x138 [drm_kms_helper])
[33512.053933] [<bf3773dc>] (drm_atomic_helper_commit [drm_kms_helper]) from [<bf2cd7bc>] (drm_atomic_commit+0x5c/0x68 [drm])
[33512.054009] [<bf2cd7bc>] (drm_atomic_commit [drm]) from [<bf2ceb04>] (drm_atomic_connector_commit_dpms+0xf8/0x108 [drm])
[33512.054083] [<bf2ceb04>] (drm_atomic_connector_commit_dpms [drm]) from [<bf2d46e8>] (drm_mode_obj_set_property_ioctl+0x214/0x318 [drm])
[33512.054157] [<bf2d46e8>] (drm_mode_obj_set_property_ioctl [drm]) from [<bf2d2f44>] (drm_mode_connector_property_set_ioctl+0x58/0x74 [drm])
[33512.054230] [<bf2d2f44>] (drm_mode_connector_property_set_ioctl [drm]) from [<bf2bac78>] (drm_ioctl_kernel+0x78/0xb8 [drm])
[33512.054301] [<bf2bac78>] (drm_ioctl_kernel [drm]) from [<bf2bb030>] (drm_ioctl+0x1b8/0x3a8 [drm])
[33512.054347] [<bf2bb030>] (drm_ioctl [drm]) from [<c0460418>] (do_vfs_ioctl+0xc0/0x834)
[33512.054361] [<c0460418>] (do_vfs_ioctl) from [<c0460c08>] (SyS_ioctl+0x7c/0x8c)
[33512.054376] [<c0460c08>] (SyS_ioctl) from [<c022db40>] (ret_fast_syscall+0x0/0x4c)
[33512.054381] ---[ end trace 2cf9711fc88327fc ]---