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drm/amd/display: Initialize denominators' default to 1

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[WHAT & HOW]
Variables used as denominators and maybe not assigned to other values,
should not be 0. Change their default to 1 so they are never 0.

This fixes 10 DIVIDE_BY_ZERO issues reported by Coverity.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Jerry Zuo <jerry.zuo@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Hung 2024-06-18 14:05:08 -06:00 committed by Alex Deucher
parent f60881ca12
commit b995c0a6de
3 changed files with 4 additions and 4 deletions
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2
drivers/gpu/drm/amd/display/dc/dml/dcn20/display_rq_dlg_calc_20.c
View File

@ -78,7 +78,7 @@ static void calculate_ttu_cursor(struct display_mode_lib *mode_lib,
static unsigned int get_bytes_per_element(enum source_format_class source_format, bool is_chroma)
{
unsigned int ret_val = 0;
unsigned int ret_val = 1;
if (source_format == dm_444_16) {
if (!is_chroma)

2
drivers/gpu/drm/amd/display/dc/dml/dml1_display_rq_dlg_calc.c
View File

@ -39,7 +39,7 @@
static unsigned int get_bytes_per_element(enum source_format_class source_format, bool is_chroma)
{
unsigned int ret_val = 0;
unsigned int ret_val = 1;
if (source_format == dm_444_16) {
if (!is_chroma)

4
drivers/gpu/drm/amd/display/dc/dml2/dml21/src/dml2_core/dml2_core_shared.c
View File

@ -9386,8 +9386,8 @@ static void CalculateVMGroupAndRequestTimes(
double TimePerVMRequestVBlank[],
double TimePerVMRequestFlip[])
{
unsigned int num_group_per_lower_vm_stage = 0;
unsigned int num_req_per_lower_vm_stage = 0;
unsigned int num_group_per_lower_vm_stage = 1;
unsigned int num_req_per_lower_vm_stage = 1;
#ifdef __DML_VBA_DEBUG__
dml2_printf("DML::%s: NumberOfActiveSurfaces = %u\n", __func__, NumberOfActiveSurfaces);