From ab262da93783cfc1e0263dbd5b185b5a413726f7 Mon Sep 17 00:00:00 2001
From: Joseph Gravenor <joseph.gravenor@amd.com>
Date: Thu, 24 Oct 2019 13:55:10 -0400
Subject: drm/amd/display: Renoir chroma viewport WA Read the correct register
Git-commit: db8ff9d38c18bed7dad5bf757d6e141603922c2b
Patch-mainline: v5.6-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322

[why]
Before we were reading registers specific to luma size, which caused a black line
to appear on the screen from time to time, as although the luma row height
is generally the same as the chroma row height for the video case, it will sometimes
be one more

[how]
Read the register specific for the chroma size

Signed-off-by: Joseph Gravenor <joseph.gravenor@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubp.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubp.c
index d86b6b6211bc..32e8b589aeb5 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubp.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubp.c
@@ -200,8 +200,8 @@ void hubp21_set_viewport(
 		int pte_row_height = 0;
 		int pte_rows = 0;
 
-		REG_GET(DCHUBP_REQ_SIZE_CONFIG,
-			PTE_ROW_HEIGHT_LINEAR, &pte_row_height);
+		REG_GET(DCHUBP_REQ_SIZE_CONFIG_C,
+			PTE_ROW_HEIGHT_LINEAR_C, &pte_row_height);
 
 		pte_row_height = 1 << (pte_row_height + 3);
 		pte_rows = (viewport_c->height / pte_row_height) + 1;
-- 
2.28.0