[PATCH 09/10] drm/amd/display: Handle Replay related hpd irq

[Bhawanpreet Lakha]

Handle replay related hpd irqs

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha at amd.com>
---
 .../dc/link/protocols/link_dp_irq_handler.c   | 66 +++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c
index ba95facc4ee8..a5605cf4449e 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c
@@ -175,6 +175,68 @@ 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];
@@ -327,6 +389,10 @@ 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.
 	 */
-- 
2.25.1