drm/amd/display: lower dp link training message level

[Why] some test apps report dp link training waring even dp
training pass. there are 4 tries of lt within
perform_link_training_with_retries. if lt pass within 4 tries,
it will NOT be reated as lt failure. for each try of lt, if lt
fails, current driver implementation prints message at warning
level. this let people think dp lt does not work properly.

[How] for 1st, 2nd and 3rd try of lt, print message at debug
level. for the 4th try of lt, print message at warning level.

Reviewed-by: Jerry Zuo <jerry.zuo@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@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.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c
index 579fa222810d4ad0a7508d35275649ad4c2e1b4d..e011df4bdaf216a872a6c6fee711faaed645e523 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c
@@ -1653,10 +1653,19 @@ bool perform_link_training_with_retries(
                                break;
                }
 
-               DC_LOG_WARNING("%s: Link(%d) training attempt %u of %d failed @ rate(%d) x lane(%d) @ spread = %x : fail reason:(%d)\n",
-                              __func__, link->link_index, (unsigned int)j + 1, attempts,
-                             cur_link_settings.link_rate, cur_link_settings.lane_count,
-                             cur_link_settings.link_spread, status);
+               if (j == (attempts - 1)) {
+                       DC_LOG_WARNING(
+                               "%s: Link(%d) training attempt %u of %d failed @ rate(%d) x lane(%d) @ spread = %x : fail reason:(%d)\n",
+                               __func__, link->link_index, (unsigned int)j + 1, attempts,
+                               cur_link_settings.link_rate, cur_link_settings.lane_count,
+                               cur_link_settings.link_spread, status);
+               } else {
+                       DC_LOG_HW_LINK_TRAINING(
+                               "%s: Link(%d) training attempt %u of %d failed @ rate(%d) x lane(%d) @ spread = %x : fail reason:(%d)\n",
+                               __func__, link->link_index, (unsigned int)j + 1, attempts,
+                               cur_link_settings.link_rate, cur_link_settings.lane_count,
+                               cur_link_settings.link_spread, status);
+               }
 
                dp_disable_link_phy(link, &pipe_ctx->link_res, signal);