[PATCH v4] drm/amd/display: Add logging when DP link training Channel EQ is Successful

[Srinivasan Shanmugam]

Log when Channel Equalization is successful.

Cc: Aurabindo Pillai <aurabindo.pillai at amd.com>
Cc: Fangzhi Zuo <Jerry.Zuo at amd.com>

Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam at amd.com>
---

v2:
 - For consistency of the printed messages, either drop or keep  %s for both the
   lines - it is dropped (Aurabindo)
 - For 128b/132b, moved the statements after EQ interlane alignment
   is done.

v3:
 - retained %s for both the lines, useful for better debugging

v4:
 - move eq/cds messages after dp_perform_128b_132b_channel_eq_done_sequence
   dp_perform_128b_132b_cds_done_sequence (Jerry)
   

 .../dc/link/protocols/link_dp_training_128b_132b.c     | 10 ++++++++--
 .../dc/link/protocols/link_dp_training_8b_10b.c        |  4 ++++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_128b_132b.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_128b_132b.c
index 23d380f09a21..db87cfe37b5c 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_128b_132b.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training_128b_132b.c
@@ -211,11 +211,17 @@ enum link_training_result dp_perform_128b_132b_link_training(
 
 	dpcd_set_link_settings(link, lt_settings);
 
-	if (result == LINK_TRAINING_SUCCESS)
+	if (result == LINK_TRAINING_SUCCESS) {
 		result = dp_perform_128b_132b_channel_eq_done_sequence(link, link_res, lt_settings);
+		if (result == LINK_TRAINING_SUCCESS)
+			DC_LOG_HW_LINK_TRAINING("%s: Channel EQ done.\n", __func__);
+	}
 
-	if (result == LINK_TRAINING_SUCCESS)
+	if (result == LINK_TRAINING_SUCCESS) {
 		result = dp_perform_128b_132b_cds_done_sequence(link, link_res, lt_settings);
+		if (result == LINK_TRAINING_SUCCESS)
+			DC_LOG_HW_LINK_TRAINING("%s: CDS done.\n", __func__);
+	}
 
 	return result;
 }
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 3889ebb2256b..2b4c15b0b407 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
@@ -388,6 +388,8 @@ enum link_training_result dp_perform_8b_10b_link_training(
 					link_res,
 					lt_settings,
 					repeater_id);
+			if (status == LINK_TRAINING_SUCCESS)
+				DC_LOG_HW_LINK_TRAINING("%s: Channel EQ done.\n", __func__);
 
 			repeater_training_done(link, repeater_id);
 
@@ -409,6 +411,8 @@ enum link_training_result dp_perform_8b_10b_link_training(
 					link_res,
 					lt_settings,
 					DPRX);
+			if (status == LINK_TRAINING_SUCCESS)
+				DC_LOG_HW_LINK_TRAINING("%s: Channel EQ done.\n", __func__);
 		}
 	}
 
-- 
2.25.1