APPLIED: [J][SRU][PATCH v2 0/7] Fix DP tunneling issues on AMD Rembrandt

[Stefan Bader]

On 02.08.22 20:11, Mario Limonciello wrote:
> BugLink: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1983143
> 
> When a Thunderbolt monitor or Thunderbolt dock are connected to a USB4
> port on AMD Yellow Carp (Rembrandt) a software connection manager works
> with the hardware to initialize tunnels.
> 
> One of those tunnels is for DP (display port). It was observed that
> on both the OEM-5.14 as well as Jammy-5.15 kernel that DP tunneling
> specifically when connecting to a Thunderbolt monitor fails.
> This circumstance does not happen on OEM-5.17 or mainline kernels.
> 
> This is due to a backport error on the USB4 patch series that went
> into OEM-5.14 and moved forward to Jammy-5.15.  Patch 1/7 in this
> series corrects that error as minimally as possible as a SAUCE patch.
> 
> It was also observed that DP tunneling is not working for Thunderbolt
> monitor connected at boot, but this is a different root cause.
> The "Pre-OS" connection manager creates DP tunnels that are expected
> to be re-used by the OS connection manager. The remaining patches in
> this series enable this flow.
> 
> Patches 2-6 are upstream patches or reverts to closer match upstream.
> Patch 7 is a SAUCE patch because it is not landed upstream yet, but
> will be needed for patch 2-6 to work properly.  If the Thunderbolt
> CM doesn't hand off resources, amdgpu can't possibly re-use them.
> 
> For this whole flow to work an updated AMDGPU DMCUB firmware is also
> needed.  This is already in process as part of:
> https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1981922
> 
> v1->v2:
> * Fixup [1/4], it didn't work due to a contextual error
> * Add a revert of a stable patch before previous patch [3/4] applied
>    so that it can re-apply cleanly.
> * Add missing dependencies for patch [3/4] to allow applying cleanly
> * Re-apply revert commit
> 
> Mario Limonciello (2):
>    UBUNTU: SAUCE: drm/amd: Fix DP Tunneling with Thunderbolt monitors
>    Revert "drm/amd/display: Fix DPIA outbox timeout after S3/S4/reset"
> 
> Meenakshikumar Somasundaram (1):
>    drm/amd/display: Fix for dmub outbox notification enable
> 
> Nicholas Kazlauskas (2):
>    drm/amd/display: Reset link encoder assignments for GPU reset
>    drm/amd/display: Fix DPIA outbox timeout after S3/S4/reset
> 
> Sanjay R Mehta (1):
>    UBUNTU: SAUCE: thunderbolt: Add DP out resource when DP tunnel is
>      discovered.
> 
> Stylon Wang (1):
>    drm/amd/display: Fix new dmub notification enabling in DM
> 
>   .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 39 +++++++++--
>   drivers/gpu/drm/amd/display/dc/core/dc.c      | 66 +++++++++++++++++--
>   drivers/gpu/drm/amd/display/dc/dc.h           |  3 +
>   .../gpu/drm/amd/display/dc/dce/dmub_outbox.c  | 25 +++----
>   .../gpu/drm/amd/display/dc/dce/dmub_outbox.h  |  4 +-
>   .../amd/display/dc/dcn10/dcn10_hw_sequencer.c |  4 --
>   .../drm/amd/display/dc/dcn20/dcn20_hwseq.c    |  5 +-
>   .../drm/amd/display/dc/dcn31/dcn31_hwseq.c    |  2 +-
>   drivers/thunderbolt/tb.c                      | 15 +++++
>   drivers/thunderbolt/tb.h                      |  1 +
>   drivers/thunderbolt/tunnel.c                  |  2 +
>   11 files changed, 133 insertions(+), 33 deletions(-)
> 

Applied to jammy:linux/master-next. Thanks.

-Stefan

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