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drm/amd/display: Check for sharpening case when calculating max vtaps for scaler

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[Why & How]
- calc_lb_num_partitions has check when scaler is not enabled to use
 larger LB in calculations for max vtaps based on viewport being 1:1
- however, scaler is forced on when sharpening is enabled, so need
 to consider this in check
- taps is predetermined in spl_get_optimal_number_of_taps prior to
 calc_lb_num_partitions.  Add check for taps not 1 to handle
 sharpening case

Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Signed-off-by: Samson Tam <Samson.Tam@amd.com>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Samson Tam
2026-05-14 08:10:14 -04:00
committed by Alex Deucher
parent ee87d401f5
commit 4d8cfd5703
1 changed files with 6 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/gpu/drm/amd/display/dc/dpp/dcn401/dcn401_dpp.c
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@@ -390,9 +390,11 @@ void dscl401_spl_calc_lb_num_partitions(
lb_memory_size_a = 1290;
} else if (lb_config == LB_MEMORY_CONFIG_3) {
if (scl_data->viewport.width == scl_data->h_active &&
scl_data->viewport.height == scl_data->v_active) {
scl_data->viewport.height == scl_data->v_active &&
scl_data->taps.h_taps == 1 && scl_data->taps.v_taps == 1) {
/* 420 mode: luma using all 3 mem from Y, plus 3rd mem from Cr and Cb */
/* use increased LB size for calculation only if Scaler not enabled */
/* Scaler is forced on when sharpening is on. Add check for taps = 1 */
lb_memory_size = 970 + 1290 + 1170 + 1170 + 1170;
lb_memory_size_c = 970 + 1290;
lb_memory_size_a = 970 + 1290 + 1170;
@@ -404,8 +406,10 @@ void dscl401_spl_calc_lb_num_partitions(
}
} else {
if (scl_data->viewport.width == scl_data->h_active &&
scl_data->viewport.height == scl_data->v_active) {
scl_data->viewport.height == scl_data->v_active &&
scl_data->taps.h_taps == 1 && scl_data->taps.v_taps == 1) {
/* use increased LB size for calculation only if Scaler not enabled */
/* Scaler is forced on when sharpening is on. Add check for taps = 1 */
lb_memory_size = 970 + 1290 + 1170;
lb_memory_size_c = 970 + 1290 + 1170;
lb_memory_size_a = 970 + 1290 + 1170;