drm/amd/display: Add enable/disable FIFO callbacks to stream setup

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[Why]
We don't write out attributes after disabling and re-enabling the link
on some monitors, causing some, but not all, HDMI displays to fail to
lightup on DCN314.

[How]
Firmware used to do this after DIG link setup.

Since firmware is no longer doing this to support USB4 and dynamic link
remapping we'll need to add this to driver in the equivalent paths.

New optional callbacks were created in the stream encoder interface and
implementations were added for DCN314.

Reviewed-by: Michael Strauss <Michael.Strauss@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Nicholas Kazlauskas 2022-07-06 16:26:40 -04:00 • committed by Alex Deucher

parent 8de297dc04

commit 44584b417a

3 changed files with 35 additions and 12 deletions

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38

drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dio_stream_encoder.c

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2

drivers/gpu/drm/amd/display/dc/inc/hw/stream_encoder.h

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7

drivers/gpu/drm/amd/display/dc/link/link_hwss_dio.c

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