Commit db7b568e authored by Meenakshikumar Somasundaram's avatar Meenakshikumar Somasundaram Committed by Alex Deucher
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drm/amd/display: Link training retry fix for abort case 



[Why]
If link training is aborted, it shall be retried if sink is present.

[How]
Check hpd status to find out whether sink is present or not. If sink is
present, then link training shall be tried again with same settings.
Otherwise, link training shall be aborted.

Reviewed-by: default avatarJimmy Kizito <Jimmy.Kizito@amd.com>
Acked-by: default avatarMikita Lipski <mikita.lipski@amd.com>
Signed-off-by: default avatarMeenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 0d9a947b

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

+7 −3
Original line number Diff line number Diff line
@@ -2433,9 +2433,13 @@ bool perform_link_training_with_retries( 
		dp_disable_link_phy(link, signal);



		/* Abort link training if failure due to sink being unplugged. */

		if (status == LINK_TRAINING_ABORT)

		if (status == LINK_TRAINING_ABORT) {

			enum dc_connection_type type = dc_connection_none;



			dc_link_detect_sink(link, &type);

			if (type == dc_connection_none)

				break;

		else if (do_fallback) {

		} else if (do_fallback) {

			decide_fallback_link_setting(*link_setting, &current_setting, status);

			/* Fail link training if reduced link bandwidth no longer meets

			 * stream requirements.