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drm/amd/display: Add a Precise Delay Routine

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Fix DP compliance failures 4.2.2.12, 4.3.1.21, 4.9.1.19
caused by imprecise delay on fsleep().

Reviewed-by: Aric Cyr <aric.cyr@amd.com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Fangzhi Zuo 2024-10-02 15:47:10 -04:00 committed by Alex Deucher
parent 0270600692
commit 6c5bb04858
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c
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@ -272,7 +272,7 @@ void dp_wait_for_training_aux_rd_interval(
struct dc_link *link,
uint32_t wait_in_micro_secs)
{
fsleep(wait_in_micro_secs);
usleep_range_state(wait_in_micro_secs, wait_in_micro_secs, TASK_UNINTERRUPTIBLE);
DC_LOG_HW_LINK_TRAINING("%s:\n wait = %d\n",
__func__,