[PATCH 0/1][SRU][J/OEM-5.17] Fix AMDGPU: No video output and system hangs with two monitor (dGPU: W6400)

[Koba Ko]

BugLink: https://bugs.launchpad.net/bugs/1989647

[Impact]
There's possibility that system will hang and no video output of two external monitor with dGPU W6400

Monitor 1: ASUS ProArt PA238Q (FHD)
Monitor 2: Dell P2415Q (4K)

[Fix]
Introduce the dmi quirk in amdgpu,
and add dmi quirks to bypass the affected machine.

[Test Case]
Two ways to verify

Method 1:
1. Cold boot with ASUS
2. Attach Dell monitor. ASUS is primary.
3. Switch display mode to single ASUS
4. Switch disaply mode back to Joing Displays. ASUS is primary

Method 2:
1. Cold boot with two monitors. ASUS is primary
2. Unplug the DP cable of Dell monitor from DUT and wait for few seconds
3. Plug it back to DUT

[Where problems could occur]
Low, add a dmi quirk to bypass the target machine.

Fangzhi Zuo (1):
  drm/amd/display: Ignore First MST Sideband Message Return Error

 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 39 +++++++++++++++++++
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |  8 ++++
 .../display/amdgpu_dm/amdgpu_dm_mst_types.c   | 17 ++++++++
 3 files changed, 64 insertions(+)

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2.34.1