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drm/amd/display: Poll pending DOWN_REP before enabling the link

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[Why]
With special monitor combination on MST, the UP_REQ could come
after clear payload table. It makes the pending DOWN_REP fail
to be handled after link training and the new DOWN_REQ will be queued
until time out .

[How]
To move the current polling pending DOWN_REP procedure to after
clear payload table to make sure the pending DOWN_REP can be
done before enabling the link.

Signed-off-by: Martin Tsai <martin.tsai@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Martin Tsai
2019-02-11 15:26:21 +08:00
committed by Alex Deucher
parent 55c374e9eb
commit 9cc032b239
3 changed files with 7 additions and 7 deletions
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2
drivers/gpu/drm/amd/display/dc/dm_helpers.h
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@@ -58,7 +58,7 @@ bool dm_helpers_dp_mst_write_payload_allocation_table(
bool enable);
/*
* poll pending down reply before clear payload allocation table
* poll pending down reply
*/
void dm_helpers_dp_mst_poll_pending_down_reply(
struct dc_context *ctx,