drm/amd/display: Clear pipe pointers on pipe reset

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[Why]
We want to clean up unnecessary asserts, one of which is an assert in
resource_is_pipe_type that fires if a pipe has no stream and still has
pointers to other pipes ("dangling state"). This gets hit because pipes
are not properly cleaned up in reset_back_end_for_pipe. When resetting a
pipe, the existing MPCC / ODM combine pointers are no longer valid,
especially when we put ODM in bypass.

[How]
 - reset pipe pointers in reset_back_end_for_pipe
 - remove useless code to avoid confusion
     (a long time ago it had a reason to be there, not anymore)

Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Signed-off-by: Joshua Aberback <joshua.aberback@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Joshua Aberback 2024-10-03 17:28:11 -04:00 • committed by Alex Deucher

parent c6335dad37

commit c0933f1de2

2 changed files with 8 additions and 16 deletions

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12

drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c

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12

drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c

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