drm/amd/display: Enable urgent latency adjustment on DCN35

[Why]

Urgent latency adjustment was disabled on DCN35 due to issues with P0
enablement on some platforms. Without urgent latency, underflows occur
when doing certain high timing configurations. After testing, we found
that reenabling urgent latency didn't reintroduce p0 support on multiple
platforms.

[How]

renable urgent latency on DCN35 and setting it to 3000 Mhz.

This reverts commit 3412860cc4c0c484f53f91b371483e6e4440c3e5.

Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Signed-off-by: Nicholas Susanto <nsusanto@amd.com>
Signed-off-by: Zaeem Mohamed <zaeem.mohamed@amd.com>
Tested-by: Mark Broadworth <mark.broadworth@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c
index 92f0a099d089ac1c0b82ee8427cebb03871f1182..d9159ca5541249bdfc1ef7aeb830e24276b99e5d 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c
@@ -195,9 +195,9 @@ struct _vcs_dpi_soc_bounding_box_st dcn3_5_soc = {
        .dcn_downspread_percent = 0.5,
        .gpuvm_min_page_size_bytes = 4096,
        .hostvm_min_page_size_bytes = 4096,
-       .do_urgent_latency_adjustment = 0,
+       .do_urgent_latency_adjustment = 1,
        .urgent_latency_adjustment_fabric_clock_component_us = 0,
-       .urgent_latency_adjustment_fabric_clock_reference_mhz = 0,
+       .urgent_latency_adjustment_fabric_clock_reference_mhz = 3000,
 };
 
 void dcn35_build_wm_range_table_fpu(struct clk_mgr *clk_mgr)