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drm/amd/display: Fix incorrect dcn1 bandwidth calculations 

[WHY]
Typos cause bandwidth calculation errors, one
of which can cause infinite loop on dcn1 with eDP

Signed-off-by: Michael Strauss <michael.strauss@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Michael Strauss 2020-05-08 13:04:23 -04:00 committed by Alex Deucher
parent 1e5d05ec80
commit 4a673157b8
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/amd/display/dc/calcs/dcn_calc_auto.c
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@ -805,7 +805,7 @@ void mode_support_and_system_configuration(struct dcn_bw_internal_vars *v)
if (v->pte_enable == dcn_bw_yes && v->dcc_enable[k] == dcn_bw_yes) {
v->time_for_meta_pte_without_immediate_flip = dcn_bw_max3(
v->meta_pte_bytes_frame[k] / v->prefetch_bandwidth[k],
v->meta_pte_bytes_frame[k] / v->prefetch_bw[k],
v->extra_latency,
v->htotal[k] / v->pixel_clock[k] / 4.0);
} else {
@ -814,7 +814,7 @@ void mode_support_and_system_configuration(struct dcn_bw_internal_vars *v)
if (v->pte_enable == dcn_bw_yes || v->dcc_enable[k] == dcn_bw_yes) {
v->time_for_meta_and_dpte_row_without_immediate_flip = dcn_bw_max3((
v->meta_row_bytes[k] + v->dpte_bytes_per_row[k]) / v->prefetch_bandwidth[k],
v->meta_row_bytes[k] + v->dpte_bytes_per_row[k]) / v->prefetch_bw[k],
v->htotal[k] / v->pixel_clock[k] - v->time_for_meta_pte_without_immediate_flip,
v->extra_latency);
} else {
@ -827,7 +827,7 @@ void mode_support_and_system_configuration(struct dcn_bw_internal_vars *v)
v->lines_for_meta_and_dpte_row_without_immediate_flip[k] =dcn_bw_floor2(4.0 * (v->time_for_meta_and_dpte_row_without_immediate_flip / (v->htotal[k] / v->pixel_clock[k]) + 0.125), 1.0) / 4;
v->maximum_vstartup = v->maximum_vstartup - 1;
if (v->lines_for_meta_pte_without_immediate_flip[k] < 8.0 && v->lines_for_meta_and_dpte_row_without_immediate_flip[k] < 16.0)
if (v->lines_for_meta_pte_without_immediate_flip[k] < 32.0 && v->lines_for_meta_and_dpte_row_without_immediate_flip[k] < 16.0)
break;
} while(1);