diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c index e6ab0186955c8..cae16b6d23442 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c @@ -263,6 +263,13 @@ bool dm_helpers_dp_mst_write_payload_allocation_table( return true; } +/* + * poll pending down reply before clear payload allocation table + */ +void dm_helpers_dp_mst_poll_pending_down_reply( + struct dc_context *ctx, + const struct dc_link *link) +{} /* * Clear payload allocation table before enable MST DP link. diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index 3dd5f2717b533..8ff5d42587c2b 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -1467,6 +1467,11 @@ static enum dc_status enable_link_dp_mst( if (link->cur_link_settings.lane_count != LANE_COUNT_UNKNOWN) return DC_OK; + /* to make sure the pending down rep can be processed + * before clear payload table + */ + dm_helpers_dp_mst_poll_pending_down_reply(link->ctx, link); + /* clear payload table */ dm_helpers_dp_mst_clear_payload_allocation_table(link->ctx, link); diff --git a/drivers/gpu/drm/amd/display/dc/dm_helpers.h b/drivers/gpu/drm/amd/display/dc/dm_helpers.h index 5d4527d03045e..e81b24374bcb0 100644 --- a/drivers/gpu/drm/amd/display/dc/dm_helpers.h +++ b/drivers/gpu/drm/amd/display/dc/dm_helpers.h @@ -57,6 +57,13 @@ bool dm_helpers_dp_mst_write_payload_allocation_table( struct dp_mst_stream_allocation_table *proposed_table, bool enable); +/* + * poll pending down reply before clear payload allocation table + */ +void dm_helpers_dp_mst_poll_pending_down_reply( + struct dc_context *ctx, + const struct dc_link *link); + /* * Clear payload allocation table before enable MST DP link. */