From ea192af507d99014775a757bbdb5f6e487fc6c7a Mon Sep 17 00:00:00 2001 From: Michael Strauss Date: Thu, 20 Oct 2022 15:57:36 -0400 Subject: drm/amd/display: Only update link settings after successful MST link train [WHY] Currently driver reduces verified link caps on DPIA devices if a link is trained at a link rate below the max rate verified during link detection. This blocks high bandwidth modes after setting a low bandwidth mode. [HOW] Only update link rate after a successful link train if link is MST. Reviewed-by: Mustapha Ghaddar Acked-by: Alan Liu Signed-off-by: Michael Strauss Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/dm_helpers.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/gpu/drm/amd/display/dc/dm_helpers.h') diff --git a/drivers/gpu/drm/amd/display/dc/dm_helpers.h b/drivers/gpu/drm/amd/display/dc/dm_helpers.h index e3e5c39895a3..af1c50ed905a 100644 --- a/drivers/gpu/drm/amd/display/dc/dm_helpers.h +++ b/drivers/gpu/drm/amd/display/dc/dm_helpers.h @@ -116,6 +116,11 @@ bool dm_helpers_dp_mst_start_top_mgr( bool dm_helpers_dp_mst_stop_top_mgr( struct dc_context *ctx, struct dc_link *link); + +void dm_helpers_dp_mst_update_branch_bandwidth( + struct dc_context *ctx, + struct dc_link *link); + /** * OS specific aux read callback. */ -- cgit v1.2.3-70-g09d2