drm/amd/display: Take FEC Overhead into Timeslot Calculation

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8b/10b encoding needs to add 3% fec overhead into the pbn.
In the Synapcis Cascaded MST hub, the first stage MST branch device
needs the information to determine the timeslot count for the
second stage MST branch device. Missing this overhead will leads to
insufficient timeslot allocation.

Cc: stable@vger.kernel.org
Cc: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Hersen Wu <hersenxs.wu@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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This commit is contained in:

Fangzhi Zuo 2023-02-28 21:34:58 -05:00 • committed by Alex Deucher

parent d142d4113f

commit 2792f98cdb

2 changed files with 27 additions and 8 deletions

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32

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c

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3

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h

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