From cbd8394d3a97f6e7457f561bab5abc9c41b664e9 Mon Sep 17 00:00:00 2001 From: Nikola Cornij Date: Tue, 29 Oct 2019 15:49:28 -0400 Subject: [PATCH] drm/amd/display: Connect DIG FE to its BE before link training starts [why] In SST mode no idle pattern will be generated after link training if DIG FE is not connected to DIG BE. Signed-off-by: Nikola Cornij Reviewed-by: Tony Cheng Acked-by: Rodrigo Siqueira Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc_link.c | 4 ++++ 1 file changed, 4 insertions(+) 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 1be4277..49f3d0f 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -1546,6 +1546,10 @@ static enum dc_status enable_link_dp( panel_mode = dp_get_panel_mode(link); dp_set_panel_mode(link, panel_mode); + /* We need to do this before the link training to ensure the idle pattern in SST + * mode will be sent right after the link training */ + link->link_enc->funcs->connect_dig_be_to_fe(link->link_enc, + pipe_ctx->stream_res.stream_enc->id, true); skip_video_pattern = true; if (link_settings.link_rate == LINK_RATE_LOW) -- 2.7.4