[PATCH 25/25] drm/amd/display: Revise Replay Desync Error IRQ handle

[Hersen Wu]

From: Dennis Chan <dennis.chan at amd.com>

[Why]
Current Desync IRQ handler will have some potential do not hit the
desync error case. We change to check both desync error HPD and DPCD.

Signed-off-by: Dennis Chan <dennis.chan at amd.com>
Acked-by: Hersen Wu <hersenxs.wu at amd.com>
Reviewed-by: Robin Chen <robin.chen at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dc_types.h                      | 1 +
 .../drm/amd/display/dc/link/protocols/link_dp_irq_handler.c    | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h b/drivers/gpu/drm/amd/display/dc/dc_types.h
index bb159b6b1b76..cea666ea66c6 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_types.h
@@ -1039,6 +1039,7 @@ struct replay_config {
 	uint32_t debug_flags;                           // Replay debug flags
 	bool replay_timing_sync_supported; // Replay desync is supported
 	bool force_disable_desync_error_check;             // Replay desync is supported
+	bool received_desync_error_hpd; //Replay Received Desync Error HPD.
 	union replay_error_status replay_error_status; // Replay error status
 };
 
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 06e829ef48af..0c00e94e90b1 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
@@ -210,6 +210,9 @@ static void handle_hpd_irq_replay_sink(struct dc_link *link)
 		&replay_error_status.raw,
 		sizeof(replay_error_status.raw));
 
+	if (replay_configuration.bits.DESYNC_ERROR_STATUS)
+		link->replay_settings.config.received_desync_error_hpd = 1;
+
 	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 =
-- 
2.25.1