drm/amd/display: Add DSC Support for Synaptics Cascaded MST Hub

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commit f4f3b7dedb upstream.

Traditional synaptics hub has one MST branch device without virtual dpcd.
Synaptics cascaded hub has two chained MST branch devices. DSC decoding
is performed via root MST branch device, instead of the second MST branch
device.

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>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Fangzhi Zuo 2023-02-24 13:45:21 -05:00 • committed by Greg Kroah-Hartman

parent ef3064e461

commit 4194f31dca

2 changed files with 31 additions and 0 deletions

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19

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

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12

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

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