Commit edfb2693 authored by Jimmy Kizito's avatar Jimmy Kizito Committed by Alex Deucher
Browse files

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: default avatarJun Lei <Jun.Lei@amd.com>
Acked-by: default avatarWayne Lin <Wayne.Lin@amd.com>
Acked-by: default avatarNicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: default avatarHarry Wentland <harry.wentland@amd.com>
Signed-off-by: default avatarJimmy Kizito <Jimmy.Kizito@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 31cf79f0

drivers/gpu/drm/amd/display/dc/core/dc_link.c

+6 −0
Original line number Diff line number Diff line
@@ -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) {

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

+2 −2
Original line number Diff line number Diff line
@@ -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,