REG_WAIT timeout - dce110_stream_encoder_dp_blank line:930 - 4.15-rc1

Submitted by Barry G

Assigned to Default DRI bug account

Link to original bug (#103949)

Description

Created attachment 135743
dmesg output

First off, I would like to thank the amdgpu developers. I was able to boot 4.15-rc1 on my RX Vega 64 and activate six displays (using two startech MST hubs). Kudos!

I am however getting ~5 of these on boot:
[ 122.039308] [drm:generic_reg_wait [amdgpu]] ERROR REG_WAIT timeout 10us * 3000 tries - dce110_stream_encoder_dp_blank line:930
[ 122.832825] [drm:generic_reg_wait [amdgpu]] ERROR REG_WAIT timeout 10us * 3000 tries - dce110_stream_encoder_dp_blank line:930
[ 123.428493] [drm:generic_reg_wait [amdgpu]] ERROR REG_WAIT timeout 10us * 3000 tries - dce110_stream_encoder_dp_blank line:930
[ 123.740053] [drm:generic_reg_wait [amdgpu]] ERROR REG_WAIT timeout 10us * 3000 tries - dce110_stream_encoder_dp_blank line:930
[ 134.681772] [drm:generic_reg_wait [amdgpu]] ERROR REG_WAIT timeout 10us * 3000 tries - dce110_stream_encoder_dp_blank line:930


The full text of the backtrace of each one is:
[ 134.681772] [drm:generic_reg_wait [amdgpu]] ERROR REG_WAIT timeout 10us * 3000 tries - dce110_stream_encoder_dp_blank line:930
[ 134.681798] WARNING: CPU: 2 PID: 854 at drivers/gpu/drm/amd/amdgpu/../display/dc/dc_helper.c:168 generic_reg_wait+0xe8/0x120 [amdgpu]
[ 134.681799] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace sunrpc fscache amdkfd amd_iommu_v2 wmi_bmof mxm_wmi amdgpu nls_iso8859_1 nls_cp437 vfat fat chash ttm edac_mce_amd xpad drm_kms_helper snd_usb_audio evdev ff_memless input_leds mousedev joydev led_class drm snd_usbmidi_lib kvm snd_hda_codec_realtek snd_rawmidi mac_hid snd_seq_device cdc_acm irqbypass snd_hda_codec_hdmi snd_hda_codec_generic igb syscopyarea sysfillrect snd_hda_intel sysimgblt ixgbe fb_sys_fops snd_hda_codec i2c_algo_bit snd_hda_core mdio snd_hwdep snd_pcm ptp pps_core snd_timer dca snd soundcore sp5100_tco tpm_tis tpm_tis_core pcspkr i2c_piix4 shpchp k10temp tpm wmi 8250_dw button acpi_cpufreq sch_fq_codel ip_tables x_tables ext4 crc16 mbcache jbd2 fscrypto algif_skcipher af_alg sd_mod dm_crypt
[ 134.681830] dm_mod dax uas usb_storage hid_generic usbhid hid crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd glue_helper cryptd ccp xhci_pci ahci rng_core sha256_generic libahci nvme xhci_hcd sha1_generic libata nvme_core usbcore scsi_mod usb_common serio
[ 134.681841] CPU: 2 PID: 854 Comm: Xorg Tainted: G W 4.15.0-rc1-g4fbd8d194f06 #1 (closed)
[ 134.681842] Hardware name: Micro-Star International Co., Ltd. MS-7B09/X399 GAMING PRO CARBON AC (MS-7B09), BIOS 1.60 11/14/2017
[ 134.681843] task: ffff880ff1426740 task.stack: ffffc900077c4000
[ 134.681854] RIP: 0010:generic_reg_wait+0xe8/0x120 [amdgpu]
[ 134.681855] RSP: 0018:ffffc900077c7850 EFLAGS: 00010297
[ 134.681856] RAX: 0000000000010200 RBX: 0000000000000bb9 RCX: 0000000000000000
[ 134.681857] RDX: 0000000000000000 RSI: ffff880ffc88dc08 RDI: ffff880ffc88dc08
[ 134.681857] RBP: 000000000000000a R08: 0000000000000000 R09: 0000000000000698
[ 134.681858] R10: 0000000000000002 R11: ffffffff821213ed R12: ffff880fe97e5700
[ 134.681858] R13: 0000000000004de2 R14: 0000000000010000 R15: 0000000000000000
[ 134.681859] FS: 00007f10e073d940(0000) GS:ffff880ffc880000(0000) knlGS:0000000000000000
[ 134.681860] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 134.681861] CR2: 000055e098cae098 CR3: 0000000fedb72000 CR4: 00000000003406e0
[ 134.681862] Call Trace:
[ 134.681878] dce110_stream_encoder_dp_blank+0xd4/0x130 [amdgpu]
[ 134.681890] dce110_disable_stream+0xf5/0x180 [amdgpu]
[ 134.681902] core_link_disable_stream+0x51/0x240 [amdgpu]
[ 134.681913] dce110_reset_hw_ctx_wrap+0x196/0x1a0 [amdgpu]
[ 134.681926] dce110_apply_ctx_to_hw+0x4c/0x610 [amdgpu]
[ 134.681938] dc_commit_state+0x37e/0x470 [amdgpu]
[ 134.681953] amdgpu_dm_atomic_commit_tail+0x2ab/0x9a0 [amdgpu]
[ 134.681957] ? __wake_up_common_lock+0x89/0xc0
[ 134.681967] ? amdgpu_bo_pin_restricted+0x1ac/0x290 [amdgpu]
[ 134.681969] ? wait_for_common+0x151/0x180
[ 134.681970] ? wait_for_common+0x151/0x180
[ 134.681974] commit_tail+0x3a/0x70 [drm_kms_helper]
[ 134.681976] drm_atomic_helper_commit+0xfc/0x110 [drm_kms_helper]
[ 134.681979] drm_atomic_helper_set_config+0x80/0x90 [drm_kms_helper]
[ 134.681983] __drm_mode_set_config_internal+0x61/0x110 [drm]
[ 134.681988] drm_mode_setcrtc+0x3fb/0x5b0 [drm]
[ 134.681992] ? drm_mode_getcrtc+0x170/0x170 [drm]
[ 134.681995] drm_ioctl_kernel+0x59/0xb0 [drm]
[ 134.681999] drm_ioctl+0x2cb/0x380 [drm]
[ 134.682003] ? drm_mode_getcrtc+0x170/0x170 [drm]
[ 134.682012] amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
[ 134.682015] do_vfs_ioctl+0xa1/0x610
[ 134.682018] ? __sys_recvmsg+0x4e/0x90
[ 134.682019] ? __sys_recvmsg+0x7d/0x90
[ 134.682020] SyS_ioctl+0x74/0x80
[ 134.682022] entry_SYSCALL_64_fastpath+0x1a/0x7d
[ 134.682024] RIP: 0033:0x7f10ddfec387
[ 134.682024] RSP: 002b:00007ffd731fdf78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 134.682025] RAX: ffffffffffffffda RBX: 00005609cd1bc580 RCX: 00007f10ddfec387
[ 134.682026] RDX: 00007ffd731fdfb0 RSI: 00000000c06864a2 RDI: 0000000000000018
[ 134.682027] RBP: 0000000000000020 R08: 00000000000000b0 R09: 00005609cce07270
[ 134.682027] R10: 00007ffd731fe130 R11: 0000000000000246 R12: 00007ffd731fe3a0
[ 134.682028] R13: 00005609cd18e070 R14: 0000000000000000 R15: 00005609ccedbb50
[ 134.682029] Code: 48 c7 c7 92 b9 a8 a0 52 4c 8b 4c 24 58 48 c7 c2 e8 53 a8 a0 44 8b 44 24 50 e8 a5 08 e9 ff 41 83 7c 24 20 01 58 8b 44 24 08 74 02 <0f> ff 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f c3 c7 44 24 0c
[ 134.682042] ---[ end trace dcc42fd11b517234 ]---

The hardware is an RX Vega 64 on a X399 Threadripper with a 1900X CPU. I am running linux 4.15-rc1 with libdrm 2.4.88 and xorg-server 1.19.5.

I am happy to give additional feedback or test patches.

Attachment 135743, "dmesg output":
full_demsg.txt