HWE Next

The display output on type-c hub doesn't work on ADL platform

Bug #1959061 reported by AceLan Kao
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
HWE Next
Fix Released
Undecided
Unassigned
linux (Ubuntu)
Fix Released
Undecided
AceLan Kao
Focal
Invalid
Undecided
Unassigned
Jammy
Fix Released
Undecided
AceLan Kao
linux-oem-5.14 (Ubuntu)
Invalid
Undecided
Unassigned
Focal
Fix Released
Undecided
AceLan Kao
Jammy
Invalid
Undecided
Unassigned

Bug Description

[Impact]
The display output(DP/HDMI) on the USB type-c hub doesn't work. No display output device could be found after the monitor is plugged into the hub.

[Fix]
Intel provide a new patch to fix this issue on ADL platforms.

[Test]
Verified on ADL platform with different type-c hubs, the display output works.

[Where problems could occur]
The TCSS_DDI_STATUS register is indexed by tc_port not by the FIA port index. So, this patch is more like a fix and only affect ADL platforms. And as the commit log describes, the value is wrong on TC#3/4 ports, so it won't affect the origin working ports.

See original description
AceLan Kao (acelankao)
Changed in linux (Ubuntu Focal):
status: New → Invalid
Changed in linux-oem-5.14 (Ubuntu Jammy):
status: New → Invalid
Changed in linux (Ubuntu Jammy):
status: New → In Progress
Changed in linux-oem-5.14 (Ubuntu Focal):
status: New → In Progress
Changed in linux (Ubuntu Jammy):
assignee: nobody → AceLan Kao (acelankao)
Changed in linux-oem-5.14 (Ubuntu Focal):
assignee: nobody → AceLan Kao (acelankao)
tags: added: oem-priority originate-from-1946314 somerville
AceLan Kao (acelankao)
description: updated
AceLan Kao (acelankao)
description: updated
Revision history for this message
David Chen (david.chen) wrote :

Intel comments:
The fix is merged to drm-tip

Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package linux-oem-5.14 - 5.14.0-1022.24

---------------
linux-oem-5.14 (5.14.0-1022.24) focal; urgency=medium

  * focal/linux-oem-5.14: 5.14.0-1022.24 -proposed tracker (LP: #1959585)

  * Got black screen when resume from s2idle with AMD dGPU (LP: #1955790)
    - drm/amdgpu: don't do resets on APUs which don't support it

  * CVE-2022-0330
    - drm/i915: Flush TLBs before releasing backing store

  * CVE-2022-22942
    - SAUCE: drm/vmwgfx: Fix stale file descriptors on failed usercopy

  * CVE-2022-23222
    - bpf: Don't promote bogus looking registers after null check.
    - bpf, selftests: Add verifier test for mem_or_null register with offset.

  * CVE-2022-24122
    - ucount: Make get_ucount a safe get_user replacement

  * The display output on type-c hub doesn't work on ADL platform (LP: #1959061)
    - SAUCE: drm/i915/adlp: Fix TypeC PHY-ready status readout

 -- Timo Aaltonen <email address hidden> Mon, 31 Jan 2022 17:45:20 +0200

Changed in linux-oem-5.14 (Ubuntu Focal):
status: In Progress → Fix Released
Revision history for this message
Timo Aaltonen (tjaalton) wrote :

fixed in 5.15.22

Changed in linux (Ubuntu Jammy):
status: In Progress → Fix Released
Changed in linux (Ubuntu):
status: In Progress → Fix Released
Changed in hwe-next:
status: New → Fix Released
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