Commit 0fc7d79b authored by Bhawanpreet Lakha's avatar Bhawanpreet Lakha Committed by Alex Deucher
Browse files

drm/amd/display: Handle Replay related hpd irq 



Handle replay related hpd irqs

Signed-off-by: default avatarBhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: default avatarHarry Wentland <harry.wentland@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent d34fecc6

drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c

+66 −0
Original line number Diff line number Diff line
@@ -182,6 +182,68 @@ static bool handle_hpd_irq_psr_sink(struct dc_link *link) 
	return false;

}



static bool handle_hpd_irq_replay_sink(struct dc_link *link)

{

	union dpcd_replay_configuration replay_configuration;

	/*AMD Replay version reuse DP_PSR_ERROR_STATUS for REPLAY_ERROR status.*/

	union psr_error_status replay_error_status;



	if (!link->replay_settings.replay_feature_enabled)

		return false;



	dm_helpers_dp_read_dpcd(

		link->ctx,

		link,

		DP_SINK_PR_REPLAY_STATUS,

		&replay_configuration.raw,

		sizeof(replay_configuration.raw));



	dm_helpers_dp_read_dpcd(

		link->ctx,

		link,

		DP_PSR_ERROR_STATUS,

		&replay_error_status.raw,

		sizeof(replay_error_status.raw));



	link->replay_settings.config.replay_error_status.bits.LINK_CRC_ERROR =

		replay_error_status.bits.LINK_CRC_ERROR;

	link->replay_settings.config.replay_error_status.bits.DESYNC_ERROR =

		replay_configuration.bits.DESYNC_ERROR_STATUS;

	link->replay_settings.config.replay_error_status.bits.STATE_TRANSITION_ERROR =

		replay_configuration.bits.STATE_TRANSITION_ERROR_STATUS;



	if (link->replay_settings.config.replay_error_status.bits.LINK_CRC_ERROR ||

		link->replay_settings.config.replay_error_status.bits.DESYNC_ERROR ||

		link->replay_settings.config.replay_error_status.bits.STATE_TRANSITION_ERROR) {

		bool allow_active;



		/* Acknowledge and clear configuration bits */

		dm_helpers_dp_write_dpcd(

			link->ctx,

			link,

			DP_SINK_PR_REPLAY_STATUS,

			&replay_configuration.raw,

			sizeof(replay_configuration.raw));



		/* Acknowledge and clear error bits */

		dm_helpers_dp_write_dpcd(

			link->ctx,

			link,

			DP_PSR_ERROR_STATUS,/*DpcdAddress_REPLAY_Error_Status*/

			&replay_error_status.raw,

			sizeof(replay_error_status.raw));



		/* Replay error, disable and re-enable Replay */

		if (link->replay_settings.replay_allow_active) {

			allow_active = false;

			edp_set_replay_allow_active(link, &allow_active, true, false, NULL);

			allow_active = true;

			edp_set_replay_allow_active(link, &allow_active, true, false, NULL);

		}

	}

	return true;

}



void dp_handle_link_loss(struct dc_link *link)

{

	struct pipe_ctx *pipes[MAX_PIPES];
@@ -360,6 +422,10 @@ bool dp_handle_hpd_rx_irq(struct dc_link *link, 
		/* PSR-related error was detected and handled */

		return true;



	if (handle_hpd_irq_replay_sink(link))

		/* Replay-related error was detected and handled */

		return true;



	/* If PSR-related error handled, Main link may be off,

	 * so do not handle as a normal sink status change interrupt.

	 */