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

[AceLan Kao]

[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.

[David Chen (david.chen)]

Intel comments:
The fix is merged to drm-tip

[Launchpad Janitor (janitor)]

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

[Timo Aaltonen (tjaalton)]

fixed in 5.15.22