From b72a7e0fd0f8d235f885f84642e5c71f4e058c4b Mon Sep 17 00:00:00 2001 From: Nicholas Susanto Date: Wed, 28 Feb 2024 14:14:17 -0500 Subject: [PATCH] drm/amd/display: Enabling urgent latency adjustment for DCN35 [Why] Underflow occurs when running netflix in a 4k144 eDP + 4k60 setup. Increasing DCFCLK or urgent latency watermark fixes the issue. Implementing this workaround for now while we figure out why this is happenning in DCN. [How] Enable urgent latency adjustment and match the reference to existing ASIC that also see increased latency at low FCLK. Reviewed-by: Nicholas Kazlauskas Acked-by: Wayne Lin Signed-off-by: Nicholas Susanto Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) 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 80bebfc268db0..4d7bcda8ef72d 100644 --- 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) -- 2.30.2