[PATCH 00/23] USB4 DP tunneling

[Lin, Wayne]

[Public]

> -----Original Message-----
> From: Wentland, Harry <Harry.Wentland at amd.com>
> Sent: Monday, October 4, 2021 10:48 PM
> To: Lin, Wayne <Wayne.Lin at amd.com>; amd-gfx at lists.freedesktop.org
> Cc: Deucher, Alexander <Alexander.Deucher at amd.com>; Kazlauskas, Nicholas <Nicholas.Kazlauskas at amd.com>; Siqueira, Rodrigo
> <Rodrigo.Siqueira at amd.com>; Wang, Chao-kai (Stylon) <Stylon.Wang at amd.com>; Shih, Jude <Jude.Shih at amd.com>; Kizito, Jimmy
> <Jimmy.Kizito at amd.com>; Somasundaram, Meenakshikumar <Meenakshikumar.Somasundaram at amd.com>
> Subject: Re: [PATCH 00/23] USB4 DP tunneling
>
>
>
> On 2021-10-04 10:40, Wayne Lin wrote:
> > These series patches are for supporting USB4 DP tunneling feature.
> >
>
> Can you provide a description (with or without diagrams) of what
> DP4 tunneling is and some of the key parts of how it works?
Thanks Harry, will give a short description about USB4 DP tunneling.

>
> Does this patchset have dependencies on patches in the USB subsystem?
AFAIK, USB4 relevant patches are already in the USB subsystem. Should have
no dependencies here.

Thanks!
>
> Harry
>
> > ---
> >
> > Jimmy Kizito (14):
> >   drm/amd/display: Update link encoder object creation.
> >   drm/amd/display: Support USB4 dynamic link encoder selection.
> >   drm/amd/display: Support USB4 for display endpoint control path.
> >   drm/amd/display: Support DP tunneling when DPRX detection
> >   drm/amd/display: Update training parameters for DPIA links
> >   drm/amd/display: Support USB4 when DP link training.
> >   drm/amd/display: Implement DPIA training loop
> >   drm/amd/display: Implement DPIA link configuration
> >   drm/amd/display: Implement DPIA clock recovery phase
> >   drm/amd/display: Implement DPIA equalisation phase
> >   drm/amd/display: Implement end of training for hop in DPIA display
> >     path
> >   drm/amd/display: Read USB4 DP tunneling data from DPCD.
> >   drm/amd/display: Fix DIG_HPD_SELECT for USB4 display endpoints.
> >   drm/amd/display: Add debug flags for USB4 DP link training.
> >
> > Jude Shih (4):
> >   drm/amd/display: Support for SET_CONFIG processing with DMUB
> >   drm/amd/display: Deadlock/HPD Status/Crash Bug Fix
> >   drm/amd/display: Fix USB4 Aux via DMUB terminate unexpectedly
> >   drm/amd/display: USB4 bring up set correct address
> >
> > Meenakshikumar Somasundaram (5):
> >   drm/amd/display: USB4 DPIA enumeration and AUX Tunneling
> >   drm/amd/display: Support for DMUB HPD and HPD RX interrupt handling
> >   drm/amd/display: Support for SET_CONFIG processing with DMUB
> >   drm/amd/display: Add dpia debug options
> >   drm/amd/display: Fix for access for ddc pin and aux engine.
> >
> >  .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 106 +-
> > .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |  12 +-
> > .../amd/display/amdgpu_dm/amdgpu_dm_helpers.c |  17 +-
> >  drivers/gpu/drm/amd/display/dc/Makefile       |   2 +-
> >  drivers/gpu/drm/amd/display/dc/core/dc.c      | 179 +++-
> >  drivers/gpu/drm/amd/display/dc/core/dc_link.c |  81 +-
> >  .../gpu/drm/amd/display/dc/core/dc_link_ddc.c |   9 +-
> >  .../gpu/drm/amd/display/dc/core/dc_link_dp.c  |  36 +-
> >  .../drm/amd/display/dc/core/dc_link_dpia.c    | 945 ++++++++++++++++++
> >  drivers/gpu/drm/amd/display/dc/core/dc_stat.c |   8 +
> >  drivers/gpu/drm/amd/display/dc/dc.h           |  22 +
> >  drivers/gpu/drm/amd/display/dc/dc_dp_types.h  |  31 +
> >  drivers/gpu/drm/amd/display/dc/dc_types.h     |   1 +
> >  drivers/gpu/drm/amd/display/dc/dce/dce_aux.c  |   3 +
> >  .../display/dc/dcn31/dcn31_dio_link_encoder.c | 126 ++-
> >  .../drm/amd/display/dc/dcn31/dcn31_hwseq.c    |   6 +
> >  .../drm/amd/display/dc/dcn31/dcn31_resource.c |   7 +
> >  drivers/gpu/drm/amd/display/dc/dm_helpers.h   |   5 +
> >  .../gpu/drm/amd/display/dc/inc/core_types.h   |   3 +
> >  .../gpu/drm/amd/display/dc/inc/dc_link_ddc.h  |   1 +
> >  .../gpu/drm/amd/display/dc/inc/dc_link_dpia.h |  98 ++
> >  drivers/gpu/drm/amd/display/dc/inc/resource.h |   1 +
> >  drivers/gpu/drm/amd/display/dc/os_types.h     |   1 +
> >  drivers/gpu/drm/amd/display/dmub/dmub_srv.h   |   3 +
> >  .../gpu/drm/amd/display/dmub/inc/dmub_cmd.h   | 113 ++-
> >  .../gpu/drm/amd/display/dmub/src/dmub_dcn31.c |   1 +
> >  .../drm/amd/display/dmub/src/dmub_srv_stat.c  |  16 +
> >  .../gpu/drm/amd/display/include/dal_asic_id.h |   2 +-
> >  28 files changed, 1793 insertions(+), 42 deletions(-)  create mode
> > 100644 drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c
> >  create mode 100644 drivers/gpu/drm/amd/display/dc/inc/dc_link_dpia.h
> >
--
Regards,
Wayne