drm/amd/display: fix graphics hang in multi-display mst case

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[what]
Graphics hang observed with 3 displays connected to DP2.0 mst dock.

[why]
There's a mismatch in dml and dc between the assignments of hpo link
encoders.

[how]
Add a new array in dml that tracks the current mapping of HPO stream
encoders to HPO link encoders in dc.

Reviewed-by: Sung joon Kim <sungjoon.kim@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Gabe Teeger <Gabe.Teeger@amd.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Gabe Teeger 2024-08-23 09:50:22 -04:00 • committed by Alex Deucher

parent efaf15752d

commit fc5da5c00c

4 changed files with 34 additions and 49 deletions

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2

drivers/gpu/drm/amd/display/dc/dml2/dml2_internal_types.h

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67

drivers/gpu/drm/amd/display/dc/dml2/dml2_translation_helper.c

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2

drivers/gpu/drm/amd/display/dc/dml2/dml2_translation_helper.h

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12

drivers/gpu/drm/amd/display/dc/dml2/dml2_utils.c

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