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

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commit 68dc1846c3 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Fangzhi Zuo 2023-02-28 21:34:58 -05:00 • committed by Greg Kroah-Hartman

parent 4194f31dca

commit d7b5638bd3

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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