drm/amd/display: Revert dram_clock_change_latency for DCN2.1

[WHY & HOW]
Using values provided by DF for latency may cause hangs in
multi display configurations. Revert change to previous value.

Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Sung Lee <sung.lee@amd.com>
Reviewed-by: Haonan Wang <Haonan.Wang2@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
index 8e8ce89b30dc5f3502666286535a22ba4895b850..644a91c95178e179e6bc9e2086928111ef23647c 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
@@ -296,7 +296,7 @@ struct _vcs_dpi_soc_bounding_box_st dcn2_1_soc = {
        .num_banks = 8,
        .num_chans = 4,
        .vmm_page_size_bytes = 4096,
-       .dram_clock_change_latency_us = 11.72,
+       .dram_clock_change_latency_us = 23.84,
        .return_bus_width_bytes = 64,
        .dispclk_dppclk_vco_speed_mhz = 3600,
        .xfc_bus_transport_time_us = 4,