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drm/amd/display: Train DPIA links with fallback 

[Why & How]
Conventional links are trained with fallback during sink detection.
Have DPIA links trained with fallback too.

Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Wayne Lin <Wayne.Lin@amd.com>
Acked-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Jimmy Kizito <Jimmy.Kizito@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jimmy Kizito 2021-04-07 18:56:19 -04:00 committed by Alex Deucher
parent 31cf79f05d
commit edfb269347
2 changed files with 8 additions and 2 deletions
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6
drivers/gpu/drm/amd/display/dc/core/dc_link.c
View File

@ -1862,6 +1862,12 @@ static enum dc_status enable_link_dp(struct dc_state *state,
/* get link settings for video mode timing */
decide_link_settings(stream, &link_settings);
/* Train with fallback when enabling DPIA link. Conventional links are
* trained with fallback during sink detection.
*/
if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA)
do_fallback = true;
#if defined(CONFIG_DRM_AMD_DC_DCN)
if (dp_get_link_encoding_format(&link_settings) == DP_128b_132b_ENCODING &&
pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT) {

4
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
View File

@ -2406,9 +2406,9 @@ bool perform_link_training_with_retries(
dc_link_dp_perform_link_training_skip_aux(link, &current_setting);
return true;
} else {
if (link->is_dig_mapping_flexible)
if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA)
status = dc_link_dpia_perform_link_training(link,
link_setting,
&current_setting,
skip_video_pattern);
else
status = dc_link_dp_perform_link_training(link,