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

[ Upstream commit b0075d114c33580f5c9fa9cee8e13d06db41471b ]

[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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sung Lee 2021-02-26 13:20:43 -05:00 committed by Greg Kroah-Hartman
parent 6292d84c8a
commit fc8e4af4c3
1 changed files with 1 additions and 1 deletions
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drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
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@ -257,7 +257,7 @@ 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,