drm/amd/display: Retrieve DSC Branch Decoder Caps

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DSC extended branch decoder caps 0xA0 ~ 0xA2 is read from dsc_aux.
The dsc_aux is returned from drm dsc determination policy with the
right DSC capable MST branch device for decoding.

The values are all zero if DSC decoding at a MST BU with virtual DPCD;
The values are meaningful when DSC decoding at a MST BU without
virtual DPCD or at a DSC capable MST endpoint.

Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Fangzhi Zuo 2021-05-10 12:01:42 -04:00 • committed by Alex Deucher

parent 4932d17697

commit 68d9821ff4

1 changed files with 8 additions and 2 deletions

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

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