drm/amd/display: Add workaround to restrict max frac urgent for DPM0

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[WHY]
Underflow occurs on some platforms when urgent BW is close to
the maximum in DPM0.

[HOW]
It does not occur at DPM1, so as a workaround restrict the maximum
amount and increase the lowest state index for clock states until
we're out of DPM0.
Adds DML2 config options to specify this pe platform as required.

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Sung-huai Wang <danny.wang@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Sung-huai Wang 2024-06-13 15:22:17 +08:00 • committed by Alex Deucher

parent a42e743917

commit 871512e36f

3 changed files with 19 additions and 1 deletions

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15

drivers/gpu/drm/amd/display/dc/dml2/dml2_wrapper.c

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2

drivers/gpu/drm/amd/display/dc/dml2/dml2_wrapper.h

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3

drivers/gpu/drm/amd/display/dc/resource/dcn35/dcn35_resource.c

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