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/openbmc/linux/drivers/gpu/drm/amd/display/dc/
H A Ddm_helpers.hdiff 9cc032b239399a43290bb203b399d0ab3ec81e27 Mon Feb 11 01:26:21 CST 2019 Martin Tsai <martin.tsai@amd.com> drm/amd/display: Poll pending DOWN_REP before enabling the link

[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>
/openbmc/linux/drivers/gpu/drm/amd/display/amdgpu_dm/
H A Damdgpu_dm_helpers.cdiff 9cc032b239399a43290bb203b399d0ab3ec81e27 Mon Feb 11 01:26:21 CST 2019 Martin Tsai <martin.tsai@amd.com> drm/amd/display: Poll pending DOWN_REP before enabling the link

[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>