From e2c4c6c10542ccfe4a0830bb6c9fd5b177b7bbb7 Mon Sep 17 00:00:00 2001
From: Alex Hung <alex.hung@amd.com>
Date: Tue, 17 Dec 2024 11:51:58 -0700
Subject: [PATCH] drm/amd/display: Initialize denominator defaults to 1

[WHAT & HOW]
Variables, used as denominators and maybe not assigned to other values,
should be initialized to non-zero to avoid DIVIDE_BY_ZERO, as reported
by Coverity.

Reviewed-by: Austin Zheng <austin.zheng@amd.com>
Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 .../dc/dml2/dml21/src/dml2_core/dml2_core_dcn4_calcs.c        | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dml2/dml21/src/dml2_core/dml2_core_dcn4_calcs.c b/drivers/gpu/drm/amd/display/dc/dml2/dml21/src/dml2_core/dml2_core_dcn4_calcs.c
index b9ec243cf9ba5..a3ffb8c95d253 100644
--- a/drivers/gpu/drm/amd/display/dc/dml2/dml21/src/dml2_core/dml2_core_dcn4_calcs.c
+++ b/drivers/gpu/drm/amd/display/dc/dml2/dml21/src/dml2_core/dml2_core_dcn4_calcs.c
@@ -600,8 +600,8 @@ static void CalculateBytePerPixelAndBlockSizes(
 {
 	*BytePerPixelDETY = 0;
 	*BytePerPixelDETC = 0;
-	*BytePerPixelY = 0;
-	*BytePerPixelC = 0;
+	*BytePerPixelY = 1;
+	*BytePerPixelC = 1;
 
 	if (SourcePixelFormat == dml2_444_64) {
 		*BytePerPixelDETY = 8;