From 9cf219f5aac41ad98736ca171be71ff6262fb88b Mon Sep 17 00:00:00 2001
From: George Shen <George.Shen@amd.com>
Date: Fri, 19 Nov 2021 20:03:20 -0500
Subject: drm/amd/display: Apply LTTPR workarounds to non-transparent mode
Git-commit: d682619557120a5f2d460b822f5ff922435a5261
Patch-mainline: v5.17-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
[Why]
Some of the vendor-specific workarounds added for transparent mode
also need to be applied to non-transparent mode in order to succeed
link training consistently.
[How]
Remove transparent mode check for the required workarounds.
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Pavle Kotarac <Pavle.Kotarac@amd.com>
Signed-off-by: George Shen <George.Shen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 9 +++++----
1 file changed, 5 insertions(+), 4 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 62510b643882..574a66833387 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
@@ -620,10 +620,12 @@ enum dc_status dpcd_set_link_settings(
#endif
if (link->dc->debug.apply_vendor_specific_lttpr_wa &&
(link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) &&
- link->lttpr_mode == LTTPR_MODE_TRANSPARENT) {
+ link->lttpr_mode == LTTPR_MODE_TRANSPARENT)
vendor_specific_lttpr_wa_one_start(link);
+
+ if (link->dc->debug.apply_vendor_specific_lttpr_wa &&
+ (link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN))
vendor_specific_lttpr_wa_one_two(link, rate);
- }
status = core_link_write_dpcd(link, DP_LINK_BW_SET, &rate, 1);
}
@@ -1494,8 +1496,7 @@ static enum link_training_result perform_clock_recovery_sequence(
wait_time_microsec = TRAINING_AUX_RD_INTERVAL;
if (link->dc->debug.apply_vendor_specific_lttpr_wa &&
- (link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) &&
- link->lttpr_mode == LTTPR_MODE_TRANSPARENT) {
+ (link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN)) {
wait_time_microsec = 16000;
}
--
2.38.1