drm/amd/display: Add explicit FIFO disable for DP blank

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[Why]
We rely on DMCUB to do this when disabling the link but it should
actually come before we disable the DP VID stream.

If we don't then the FIFO can end up with underflow that persists
the next time it's enabled.

[How]
Add a DCN314 specific blank sequence that will disable the DIG FIFO
first.

Reviewed-by: Syed Hassan <Syed.Hassan@amd.com>
Acked-by: Jasdeep Dhillon <jdhillon@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 2022-09-08 11:11:47 -04:00 • committed by Alex Deucher

parent ec55a1c081

commit c55bf690fe

1 changed files with 11 additions and 1 deletions

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12

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

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