drm/amd/display: Add work around for tunneled MST.

Browse source

[Why]
Certain USB4 docks do not seem to be able to handle disabling
DSC once it has been enabled on an MST stream. This can result
in blank displays.

[How]
As a work around, always enable DSC on docks exhibiting this issue. The
flag to indicate the use of DSC for MST streams on a USB4 dock is set
during detection of the dock and only cleared when the USB4 dock is
disconnected.

Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Jimmy Kizito <Jimmy.Kizito@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Jimmy Kizito 2021-11-14 21:48:02 -05:00 • committed by Alex Deucher

parent 0a04390418

commit ab644ea692

4 changed files with 30 additions and 11 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

16

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

View file

20

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

View file

3

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

View file

2

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

View file