drm/amd/display: Check top sink only when multiple streams for DP2

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[why]
When switching from extended to second display only
mode, the top remote sink is not removed while the top stream
itself is released. This causes DML to think there is no
DP2 output encoder because top remote sink does not match
with the second stream and disables DTBCLK and causes
hang.

[how]
For DP2.0 MST hubs, only treat 1st remote sink as an encoder
only when there are multiple displays connected.

Reviewed-by: Michael Strauss <michael.strauss@amd.com>
Signed-off-by: Sung Joon Kim <sungjoon.kim@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Sung Joon Kim 2024-07-11 11:24:07 -04:00 • committed by Alex Deucher

parent ec0d7abbb0

commit fae1879dc2

4 changed files with 42 additions and 8 deletions

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1

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

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41

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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6

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

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