[pull] drm DP MST DSC support

[Alex Deucher]

Hi Dave, Daniel,

Ideally this would have gone through drm-misc, but it had dependencies
on some changes in the DC code which were in my latest PR, so I sent
this as a separate PR on top of my amdgpu PR.

The following changes since commit 0f899fd466b693a129b16994c1b2b4db2fcde4a4:

  drm/amdkfd: Improve kfd_process lookup in kfd_ioctl (2020-01-09 16:08:19 -0500)

are available in the Git repository at:

  git://people.freedesktop.org/~agd5f/linux tags/amd-drm-next-5.6-2020-01-09-dp-mst-dsc

for you to fetch changes up to 9edb435aed968a2c792f6d847f524587697edf37:

  drm/dp_mst: fix documentation of drm_dp_mst_add_affected_dsc_crtcs (2020-01-09 18:07:48 -0500)

----------------------------------------------------------------
amd-drm-next-5.6-2020-01-09-dp-mst-dsc:

drm:
- Add MST helper for PBN calculation of DSC modes
- Parse FEC caps on MST ports
- Add MST DPCD R/W functions
- Add MST helpers for virtual DPCD aux
- Add MST HUB quirk
- Add MST DSC enablement helpers

amdgpu:
- Enable MST DSC
- Add fair share algo for DSC bandwidth calcs

----------------------------------------------------------------
Alex Deucher (2):
      drm/amdgpu/display: protect new DSC code with CONFIG_DRM_AMD_DC_DCN
      drm/dp_mst: fix documentation of drm_dp_mst_add_affected_dsc_crtcs

David (Dingchen) Zhang (1):
      drm: add dp helper to initialize remote aux channel.

David Francis (9):
      drm/dp_mst: Add PBN calculation for DSC modes
      drm/dp_mst: Parse FEC capability on MST ports
      drm/dp_mst: Add MST support to DP DPCD R/W functions
      drm/dp_mst: Fill branch->num_ports
      drm/dp_mst: Add helpers for MST DSC and virtual DPCD aux
      drm/amd/display: Initialize DSC PPS variables to 0
      drm/amd/display: Validate DSC caps on MST endpoints
      drm/amd/display: Write DSC enable to MST DPCD
      drm/amd/display: MST DSC compute fair share

Mikita Lipski (10):
      drm/dp_mst: Add new quirk for Synaptics MST hubs
      drm/dp_mst: Manually overwrite PBN divider for calculating timeslots
      drm/dp_mst: Add DSC enablement helpers to DRM
      drm/dp_mst: Add branch bandwidth validation to MST atomic check
      drm/dp_mst: Rename drm_dp_mst_atomic_check_topology_state
      drm/amd/display: Add PBN per slot calculation for DSC
      drm/amd/display: Check return value of drm helper
      drm/amd/display: Recalculate VCPI slots for new DSC connectors
      drm/dp_mst: Add helper to trigger modeset on affected DSC MST CRTCs
      drm/amd/display: Trigger modesets on MST DSC connectors

 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c  | 121 +++++-
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h  |   1 +
 .../drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c  |  19 +-
 .../amd/display/amdgpu_dm/amdgpu_dm_mst_types.c    | 420 ++++++++++++++++++++-
 .../amd/display/amdgpu_dm/amdgpu_dm_mst_types.h    |   7 +
 drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c |   3 +
 drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dsc.c   |   3 +
 .../gpu/drm/amd/display/dc/dcn20/dcn20_resource.c  |   7 +-
 .../gpu/drm/amd/display/dc/dcn20/dcn20_resource.h  |   1 +
 drivers/gpu/drm/drm_dp_aux_dev.c                   |  12 +-
 drivers/gpu/drm/drm_dp_helper.c                    |  45 ++-
 drivers/gpu/drm/drm_dp_mst_topology.c              | 392 ++++++++++++++++++-
 drivers/gpu/drm/i915/display/intel_dp_mst.c        |   5 +-
 drivers/gpu/drm/nouveau/dispnv50/disp.c            |   4 +-
 drivers/gpu/drm/radeon/radeon_dp_mst.c             |   2 +-
 drivers/gpu/drm/selftests/test-drm_dp_mst_helper.c |  12 +-
 include/drm/drm_dp_helper.h                        |   8 +
 include/drm/drm_dp_mst_helper.h                    |  20 +-
 18 files changed, 1031 insertions(+), 51 deletions(-)