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drm/amd/display: Add Writeback Watermarks and Latency Fields

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Add fields that can used for writeback watermarks and latency margin

Signed-off-by: Austin Zheng <Austin.Zheng@amd.com>
Reviewed-by: Wayne Lin <Wayne.Lin@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Austin Zheng
2026-06-03 16:38:51 -04:00
committed by Alex Deucher
parent 7f33fb4f4f
commit 17ba75a0db
3 changed files with 6 additions and 0 deletions
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1
drivers/gpu/drm/amd/display/dc/dml2_0/dml21/inc/dml_top_types.h
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@@ -457,6 +457,7 @@ struct dml2_display_cfg_programming {
double fclk_pstate_change_us;
double usr_retraining_us;
double temp_read_or_ppt_watermark_us;
double writeback_temp_read_or_ppt_watermark_us;
} watermarks;
struct {

3
drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn4_calcs.c
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@@ -317,6 +317,7 @@ dml_get_var_func(meta_trip_memory_us, double, mode_lib->mp.MetaTripToMemory);
dml_get_var_func(wm_fclk_change, double, mode_lib->mp.Watermark.FCLKChangeWatermark);
dml_get_var_func(wm_usr_retraining, double, mode_lib->mp.Watermark.USRRetrainingWatermark);
dml_get_var_func(wm_temp_read_or_ppt, double, mode_lib->mp.Watermark.temp_read_or_ppt_watermark_us);
dml_get_var_func(wm_writeback_temp_read_or_ppt, double, mode_lib->mp.Watermark.writeback_temp_read_or_ppt_watermark_us);
dml_get_var_func(wm_dram_clock_change, double, mode_lib->mp.Watermark.DRAMClockChangeWatermark);
dml_get_var_func(fraction_of_urgent_bandwidth, double, mode_lib->mp.FractionOfUrgentBandwidth);
dml_get_var_func(fraction_of_urgent_bandwidth_imm_flip, double, mode_lib->mp.FractionOfUrgentBandwidthImmediateFlip);
@@ -13230,6 +13231,8 @@ void dml2_core_calcs_get_informative(const struct dml2_core_internal_display_mod
out->informative.watermarks.fclk_pstate_change_us = dml_get_wm_fclk_change(mode_lib);
out->informative.watermarks.usr_retraining_us = dml_get_wm_usr_retraining(mode_lib);
out->informative.watermarks.temp_read_or_ppt_watermark_us = dml_get_wm_temp_read_or_ppt(mode_lib);
out->informative.watermarks.writeback_temp_read_or_ppt_watermark_us = dml_get_wm_writeback_temp_read_or_ppt(mode_lib);
out->informative.mall.total_surface_size_in_mall_bytes = 0;
out->informative.dpp.total_num_dpps_required = 0;

2
drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_shared_types.h
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@@ -212,6 +212,7 @@ struct dml2_core_internal_watermarks {
double Z8StutterEnterPlusExitWatermark;
double USRRetrainingWatermark;
double temp_read_or_ppt_watermark_us;
double writeback_temp_read_or_ppt_watermark_us;
};
struct dml2_core_internal_mode_support_info {
@@ -1269,6 +1270,7 @@ struct dml2_core_calcs_CalculateWatermarksMALLUseAndDRAMSpeedChangeSupport_local
double FullDETBufferingTimeC;
double WritebackDRAMClockChangeLatencyMargin;
double WritebackFCLKChangeLatencyMargin;
double WritebackTempReadOrPptLatencyMargin;
double WritebackLatencyHiding;
unsigned int TotalActiveWriteback;