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drm/amd/display: increase Z9 latency to workaround underflow in Z9

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[Why]
Z9 latency is higher than when we originally tuned the watermark
parameters, causing underflow. Increasing the value until the latency
issues is resolved.

Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Agustin Gutierrez Sanchez <agustin.gutierrez@amd.com>
Signed-off-by: Eric Yang <Eric.Yang2@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Eric Yang 2021-09-30 13:46:45 -04:00 committed by Alex Deucher
parent 672437486e
commit 4835ea6c17
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c
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@ -217,8 +217,8 @@ struct _vcs_dpi_soc_bounding_box_st dcn3_1_soc = {
.num_states = 5,
.sr_exit_time_us = 9.0,
.sr_enter_plus_exit_time_us = 11.0,
.sr_exit_z8_time_us = 402.0,
.sr_enter_plus_exit_z8_time_us = 520.0,
.sr_exit_z8_time_us = 442.0,
.sr_enter_plus_exit_z8_time_us = 560.0,
.writeback_latency_us = 12.0,
.dram_channel_width_bytes = 4,
.round_trip_ping_latency_dcfclk_cycles = 106,