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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 <nikola.cornij@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Nikola Cornij 2019-10-29 15:49:28 -04:00 committed by Alex Deucher
parent 5b956e9873
commit cbd8394d3a
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/amd/display/dc/core/dc_link.c
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@ -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)