MST has been broken on amdgpu after a refactor in drm_dp_mst code that was aligning drm_dp_mst more closely with the atomic model.
The gitlab issue: https://gitlab.freedesktop.org/drm/amd/-/issues/2171
This series fixes it.
It can be found at https://gitlab.freedesktop.org/hwentland/linux/-/tree/mst_regression
A stable-6.1.y rebase can be found at https://gitlab.freedesktop.org/hwentland/linux/-/tree/mst_regression_6.1
Lyude Paul (1): drm/amdgpu/display/mst: Fix mst_state->pbn_div and slot count assignments
Wayne Lin (6): drm/amdgpu/display/mst: limit payload to be updated one by one drm/amdgpu/display/mst: update mst_mgr relevant variable when long HPD drm/drm_print: correct format problem drm/display/dp_mst: Correct the kref of port. drm/amdgpu/display/mst: adjust the naming of mst_port and port of aconnector drm/amdgpu/display/mst: adjust the logic in 2nd phase of updating payload
drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 4 +- .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 48 +++++++++--- .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 4 +- .../drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c | 2 +- .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 16 ++-- .../amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 76 +++++++++++++------ .../display/amdgpu_dm/amdgpu_dm_mst_types.c | 53 ++++++------- drivers/gpu/drm/amd/display/dc/core/dc_link.c | 14 +++- drivers/gpu/drm/display/drm_dp_mst_topology.c | 4 +- include/drm/drm_print.h | 2 +- 10 files changed, 143 insertions(+), 80 deletions(-)
-- 2.39.0