From: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Date: Thu, 13 Apr 2023 19:50:18 +0000 (+0530)
Subject: drm/amd/display: Add logging when DP link training Clock recovery is Successful
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=88c7ad91e378775a08f54b4a85068d51b5cf52f3;p=linux.git

drm/amd/display: Add logging when DP link training Clock recovery is Successful

Log when Clock recovery is successful, as part of
DP link training process.

Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>
Cc: Fangzhi Zuo <Jerry.Zuo@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_8b_10b.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_8b_10b.c
index 14b98e096d392..3889ebb2256bf 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_8b_10b.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_8b_10b.c
@@ -225,8 +225,10 @@ enum link_training_result perform_8b_10b_clock_recovery_sequence(
 				offset);
 
 		/* 5. check CR done*/
-		if (dp_is_cr_done(lane_count, dpcd_lane_status))
+		if (dp_is_cr_done(lane_count, dpcd_lane_status)) {
+			DC_LOG_HW_LINK_TRAINING("%s: Clock recovery OK\n", __func__);
 			return LINK_TRAINING_SUCCESS;
+		}
 
 		/* 6. max VS reached*/
 		if ((link_dp_get_encoding_format(&lt_settings->link_settings) ==
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_dpia.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_dpia.c
index ab4aafdb5e5c1..4f4e899e5c46d 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_dpia.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_dpia.c
@@ -401,6 +401,7 @@ static enum link_training_result dpia_training_cr_non_transparent(
 
 		/* Check if clock recovery successful. */
 		if (dp_is_cr_done(lane_count, dpcd_lane_status)) {
+			DC_LOG_HW_LINK_TRAINING("%s: Clock recovery OK\n", __func__);
 			result = LINK_TRAINING_SUCCESS;
 			break;
 		}
@@ -508,6 +509,7 @@ static enum link_training_result dpia_training_cr_transparent(
 
 		/* Check if clock recovery successful. */
 		if (dp_is_cr_done(lane_count, dpcd_lane_status)) {
+			DC_LOG_HW_LINK_TRAINING("%s: Clock recovery OK\n", __func__);
 			result = LINK_TRAINING_SUCCESS;
 			break;
 		}