drm/amd/display: Add DP 2.0 MST DC Support

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[Why]
configure/call DC interface for DP2 mst support. This is needed to make DP2
mst work.

[How]
- add encoding type, logging, mst update/reduce payload functions

Use the link encoding to determine the DP type (1.4 or 2.0) and add a
flag to dc_stream_update to determine whether to increase/reduce
payloads.

v2:
* add DP_UNKNOWN_ENCODING handling

Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Reviewed-by: "Lin, Wayne" <Wayne.Lin@amd.com>
Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211025223825.301703-4-lyude@redhat.com

...

This commit is contained in:

Fangzhi Zuo 2021-10-25 18:38:23 -04:00 • committed by Lyude Paul

parent d6c6a76f80

commit d740e0bf8e

5 changed files with 345 additions and 0 deletions

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14

drivers/gpu/drm/amd/display/dc/core/dc.c

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292

drivers/gpu/drm/amd/display/dc/core/dc_link.c

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19

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

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7

drivers/gpu/drm/amd/display/dc/dc_link.h

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13

drivers/gpu/drm/amd/display/dc/dc_stream.h

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