[PATCH 51/77] drm/amd/display: do not reset lane count in EQ fallback

[Harry Wentland]

From: Wenjing Liu <Wenjing.Liu at amd.com>

[Description]
According to DP1.4 specs we should not reset lane count back
when falling back in failing EQ training.
This causes PHY test pattern compliance to fail as infinite LT
when LT fails EQ to 4 RBR and fails CR in a loop.

Change-Id: I057bab303ee15ceccb458beeb5a61aab9208d27b
Signed-off-by: Wenjing Liu <Wenjing.Liu at amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
Acked-by: Harry Wentland <Harry.Wentland at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index e19447d526ea..446e2933474c 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -1302,8 +1302,6 @@ bool decide_fallback_link_setting(
 					current_link_setting->lane_count);
 		} else if (!reached_minimum_link_rate
 				(current_link_setting->link_rate)) {
-			current_link_setting->lane_count =
-				initial_link_settings.lane_count;
 			current_link_setting->link_rate =
 				reduce_link_rate(
 					current_link_setting->link_rate);
-- 
2.11.0