From 2b6b7ab4b1cabfbee1af5d818efcab5d51d62c7e Mon Sep 17 00:00:00 2001
From: George Shen <george.shen@amd.com>
Date: Tue, 22 Dec 2020 14:05:41 -0500
Subject: [PATCH] drm/amd/display: Fix DPCD translation for LTTPR
 AUX_RD_INTERVAL

[Why]
The translation between the DPCD value and the specified AUX_RD_INTERVAL
in the DP spec do not match.

[How]
Update values to match the spec.

Signed-off-by: George Shen <george.shen@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 8 ++++----
 1 file changed, 4 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 f95bade59624..1e4794e2825c 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
@@ -892,14 +892,14 @@ static uint32_t translate_training_aux_read_interval(uint32_t dpcd_aux_read_inte
 
 	switch (dpcd_aux_read_interval) {
 	case 0x01:
-		aux_rd_interval_us = 400;
-		break;
-	case 0x02:
 		aux_rd_interval_us = 4000;
 		break;
-	case 0x03:
+	case 0x02:
 		aux_rd_interval_us = 8000;
 		break;
+	case 0x03:
+		aux_rd_interval_us = 12000;
+		break;
 	case 0x04:
 		aux_rd_interval_us = 16000;
 		break;