From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [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] Date: Thu, 02 Aug 2018 16:55:51 +0000 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============2030434017==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [IPv6:2610:10:20:722:a800:ff:fe98:4b55]) by gabe.freedesktop.org (Postfix) with ESMTP id 8ABDD893EC for ; Thu, 2 Aug 2018 16:55:51 +0000 (UTC) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============2030434017== Content-Type: multipart/alternative; boundary="15332289510.e3DdeB0.11273" Content-Transfer-Encoding: 7bit --15332289510.e3DdeB0.11273 Date: Thu, 2 Aug 2018 16:55:51 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated https://bugs.freedesktop.org/show_bug.cgi?id=3D107456 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: marc@dragonfly.plus.com Created attachment 140936 --> https://bugs.freedesktop.org/attachment.cgi?id=3D140936&action=3Dedit 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 "str= uct drm_dp_aux_msg =E2=80=94 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 =3D %d\n", msg->size);" and it displays t= he result twice, which is curious. # dmesg | grep -i "msg->size" [ 9.469511] msg->size =3D -5 [ 9.469803] msg->size =3D -5 Anyway, full "dmesg" attached. --=20 You are receiving this mail because: You are the assignee for the bug.= --15332289510.e3DdeB0.11273 Date: Thu, 2 Aug 2018 16:55:51 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated
Bug ID 107456
Summary WARNING: CPU: 11 PID: 1137 at drivers/gpu/drm/amd/amdgpu/../d= isplay/amdgpu_dm/amdgpu_dm_mst_types.c:88 dm_dp_aux_transfer+0xa5/0xc0 [amd= gpu]
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 marc@dragonfly.plus.com 

Created attachment 140936 =
[details]
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 =E2=80=94 DisplayPort AUX channel transaction". Now, wi=
th my hardware I
don't have any monitors connected via DisplayPort. Is that relevant?

I patched in a "printk("msg->size =3D %d\n", msg->size=
);" and it displays the
result twice, which is curious.

# dmesg | grep -i "msg->size"
[    9.469511] msg->size =3D -5
[    9.469803] msg->size =3D -5

Anyway, full "dmesg" attached.

You are receiving this mail because:
  • You are the assignee for the bug.
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