[Bug 107456] WARNING: CPU: 11 PID: 1137 at drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:88 dm_dp_aux_transfer+0xa5/0xc0 [amdgpu]
https://bugs.freedesktop.org/show_bug.cgi?id=107456 Martin Peres changed: What|Removed |Added Status|NEW |RESOLVED Resolution|--- |MOVED --- Comment #2 from Martin Peres --- -- GitLab Migration Automatic Message -- This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity. You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/470. -- You are receiving this mail because: You are the assignee for the bug.___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
[Bug 107456] WARNING: CPU: 11 PID: 1137 at drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:88 dm_dp_aux_transfer+0xa5/0xc0 [amdgpu]
https://bugs.freedesktop.org/show_bug.cgi?id=107456 --- Comment #1 from Marc Thomas --- I still see this in 4.18.9. I found that udevd is running "/usr/bin/xcmddc --i2c /dev/i2c-7 --identify" during boot and it causes these warnings to be displayed. Latest from 4.18.9, caused by manually running "xcmddc -lv" : [ 72.162951] WARNING: CPU: 15 PID: 1886 at drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:88 dm_dp_aux_transfer+0xa5/0xb0 [amdgpu] [ 72.162952] Modules linked in: nct6775 hwmon_vid jc42 amd64_edac_mod edac_mce_amd pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) ipv6 cmac bnep nls_iso8859_1 nls_cp437 vfat fat fuse rc_pinnacle_pctv_hd em28xx_rc rc_core si2157 si2168 i2c_mux em28xx_dvb dvb_core btusb em28xx btrtl btbcm tveeprom btintel v4l2_common videodev bluetooth ecdh_generic rfkill amdkfd amd_iommu_v2 amdgpu snd_hda_codec_realtek chash i2c_dev snd_hda_codec_generic mxm_wmi wmi_bmof snd_hda_codec_hdmi gpu_sched kvm_amd ttm snd_hda_intel snd_hda_codec drm_kms_helper igb kvm snd_hda_core drm snd_hwdep ptp snd_pcm evdev psmouse irqbypass pps_core snd_timer agpgart crct10dif_pclmul crc32_pclmul fb_sys_fops crc32c_intel dca efi_pstore syscopyarea sysfillrect k10temp i2c_piix4 i2c_algo_bit serio_raw ghash_clmulni_intel snd [ 72.162985] sysimgblt efivars soundcore hwmon i2c_core ccp xhci_pci xhci_hcd wmi pcc_cpufreq button acpi_cpufreq loop dm_snapshot dm_bufio ext4 mbcache jbd2 [ 72.162995] CPU: 15 PID: 1886 Comm: xcmddc Tainted: GW O 4.18.9 #1 [ 72.162996] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./X370 Taichi, BIOS P4.70 04/17/2018 [ 72.163053] RIP: 0010:dm_dp_aux_transfer+0xa5/0xb0 [amdgpu] [ 72.163053] Code: be 01 00 00 00 48 8b bf 50 04 00 00 5b e9 a3 99 07 00 4c 8b 46 08 8b 0e 31 d2 31 f6 48 8b bf 50 04 00 00 e8 2d 9a 07 00 eb c6 <0f> 0b 48 c7 c0 f9 ff ff ff 5b c3 0f 1f 44 00 00 41 57 41 56 41 55 [ 72.163076] RSP: 0018:be2380d9bcc8 EFLAGS: 00010286 [ 72.163077] RAX: 0005 RBX: 0007 RCX: 0238 [ 72.163078] RDX: 0001 RSI: be2380d9bd48 RDI: 9756f60c48a0 [ 72.163079] RBP: 9756f60c48a0 R08: 000240c0 R09: fffb [ 72.163080] R10: e748dfe98f40 R11: be2380d9baa8 R12: be2380d9bd48 [ 72.163081] R13: R14: R15: c1285cd4 [ 72.163083] FS: 7f2adf318bc0() GS:97571efc() knlGS: [ 72.163084] CS: 0010 DS: ES: CR0: 80050033 [ 72.163085] CR2: 7f2ae07d9ff0 CR3: 0007e9802000 CR4: 003406e0 [ 72.163085] Call Trace: [ 72.163094] drm_dp_i2c_do_msg+0x90/0x290 [drm_kms_helper] [ 72.163098] ? __switch_to_asm+0x34/0x70 [ 72.163104] drm_dp_i2c_xfer+0x155/0x250 [drm_kms_helper] [ 72.163110] __i2c_transfer+0x123/0x410 [i2c_core] [ 72.163112] ? __switch_to_asm+0x40/0x70 [ 72.163116] i2c_transfer+0x55/0xa0 [i2c_core] [ 72.163120] i2c_transfer_buffer_flags+0x4c/0x70 [i2c_core] [ 72.163123] i2cdev_read+0x5f/0xd0 [i2c_dev] [ 72.163125] __vfs_read+0x36/0x180 [ 72.163128] vfs_read+0x8a/0x140 [ 72.163130] ksys_read+0x4f/0xb0 [ 72.163133] do_syscall_64+0x55/0x100 [ 72.163136] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 72.163137] RIP: 0033:0x7f2ae08605e1 [ 72.163138] Code: fe ff ff 50 48 8d 3d 2e 27 0a 00 e8 49 21 02 00 66 0f 1f 84 00 00 00 00 00 48 8d 05 19 c1 0d 00 8b 00 85 c0 75 13 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 57 c3 66 0f 1f 44 00 00 41 54 49 89 d4 55 48 [ 72.163159] RSP: 002b:7ffe53d875c8 EFLAGS: 0246 ORIG_RAX: [ 72.163161] RAX: ffda RBX: 000a RCX: 7f2ae08605e1 [ 72.163162] RDX: 0080 RSI: 01db9d20 RDI: 000a [ 72.163162] RBP: 7f2ae0cd1258 R08: 01db9d20 R09: [ 72.163163] R10: R11: 0246 R12: 7ffe53d875d0 [ 72.163164] R13: 7ffe53d876b0 R14: 7ffe53d876b8 R15: 01db1603 [ 72.163166] ---[ end trace 5078b35dfa1666e0 ]--- [ 72.413950] WARNING: CPU: 15 PID: 1886 at drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:88 dm_dp_aux_transfer+0xa5/0xb0 [amdgpu] [ 72.413951] Modules linked in: nct6775 hwmon_vid jc42 amd64_edac_mod edac_mce_amd pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) ipv6 cmac bnep nls_iso8859_1 nls_cp437 vfat fat fuse rc_pinnacle_pctv_hd em28xx_rc rc_core si2157 si2168 i2c_mux em28xx_dvb dvb_core btusb em28xx btrtl btbcm tveeprom btintel v4l2_common videodev bluetooth ecdh_generic rfkill amdkfd amd_iommu_v2 amdgpu snd_hda_codec_realtek chash i2c_dev snd_hda_codec_generic mxm_wmi wmi_bmof snd_hda_codec_hdmi gpu_sched kvm_amd ttm snd_hda_intel snd_hda_codec drm_kms_helper igb kvm snd_hda_core drm snd_hwdep ptp snd_pcm evdev psmouse irqbypass pps_core snd_timer agpgart crct10dif_pclmul crc32_pclmul fb_sys_fops crc32c_intel dca efi_pstore syscopyarea sysfillrect k10temp
[Bug 107456] WARNING: CPU: 11 PID: 1137 at drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:88 dm_dp_aux_transfer+0xa5/0xc0 [amdgpu]
https://bugs.freedesktop.org/show_bug.cgi?id=107456
Bug ID: 107456
Summary: WARNING: CPU: 11 PID: 1137 at
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu
_dm_mst_types.c:88 dm_dp_aux_transfer+0xa5/0xc0
[amdgpu]
Product: DRI
Version: unspecified
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: DRM/AMDgpu
Assignee: dri-devel@lists.freedesktop.org
Reporter: m...@dragonfly.plus.com
Created attachment 140936
--> https://bugs.freedesktop.org/attachment.cgi?id=140936=edit
dmesg output
I see the following warning during boot with Linux kernel 4.18.0-rc6 & 4.17.10:
root@deepthought:~# dmesg | grep WARN
[9.346100] WARNING: CPU: 11 PID: 1137 at
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:88
dm_dp_aux_transfer+0xa5/0xc0 [amdgpu]
[9.346162] WARNING: CPU: 14 PID: 1139 at
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:88
dm_dp_aux_transfer+0xa5/0xc0 [amdgpu]
Hardware is Ryzen 7 2700x, Sapphire Technology Radeon RX 480, IIyama ProLite
XB2380HS connected via DVI.
It looks like "dm_dp_aux_transfer" is used to setup DisplayPort, using "struct
drm_dp_aux_msg — DisplayPort AUX channel transaction". Now, with my hardware I
don't have any monitors connected via DisplayPort. Is that relevant?
I patched in a "printk("msg->size = %d\n", msg->size);" and it displays the
result twice, which is curious.
# dmesg | grep -i "msg->size"
[9.469511] msg->size = -5
[9.469803] msg->size = -5
Anyway, full "dmesg" attached.
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