diff options
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link.c | 8 |
1 files changed, 8 insertions, 0 deletions
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 204460cbc7f9..3900c81699a0 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -854,6 +854,7 @@ static bool dc_link_detect_helper(struct dc_link *link, struct dpcd_caps prev_dpcd_caps; bool same_dpcd = true; enum dc_connection_type new_connection_type = dc_connection_none; + enum dc_connection_type pre_connection_type = dc_connection_none; bool perform_dp_seamless_boot = false; const uint32_t post_oui_delay = 30; // 30ms @@ -889,6 +890,7 @@ static bool dc_link_detect_helper(struct dc_link *link, link_disconnect_sink(link); if (new_connection_type != dc_connection_none) { + pre_connection_type = link->type; link->type = new_connection_type; link->link_state_valid = false; @@ -962,6 +964,12 @@ static bool dc_link_detect_helper(struct dc_link *link, return true; } + // link switch from MST to non-MST stop topology manager + if (pre_connection_type == dc_connection_mst_branch && + link->type != dc_connection_mst_branch) { + dm_helpers_dp_mst_stop_top_mgr(link->ctx, link); + } + if (link->type == dc_connection_mst_branch) { LINK_INFO("link=%d, mst branch is now Connected\n", link->link_index); |