drm/amd/display: Change dram_clock_latency to 34us for dcn351

[Why]
Intermittent underflow observed when using 4k144 display on
dcn351

[How]
Update dram_clock_change_latency_us from 11.72us to 34us

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Zaeem Mohamed <zaeem.mohamed@amd.com>
Signed-off-by: Daniel Miess <daniel.miess@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn351/dcn351_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn351/dcn351_fpu.c
index e4f333d..a201dbb 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn351/dcn351_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn351/dcn351_fpu.c
@@ -215,7 +215,7 @@ struct _vcs_dpi_soc_bounding_box_st dcn3_51_soc = {
        .urgent_latency_pixel_data_only_us = 4.0,
        .urgent_latency_pixel_mixed_with_vm_data_us = 4.0,
        .urgent_latency_vm_data_only_us = 4.0,
-       .dram_clock_change_latency_us = 11.72,
+       .dram_clock_change_latency_us = 34,
        .urgent_out_of_order_return_per_channel_pixel_only_bytes = 4096,
        .urgent_out_of_order_return_per_channel_pixel_and_vm_bytes = 4096,
        .urgent_out_of_order_return_per_channel_vm_only_bytes = 4096,