drm/i915/ptl/dp_mst: Fix slave transcoder enabling wrt. DDI function

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On PTL during modeset enabling configure the DDI function without
enabling it for MST slave transcoders before programming the data and
link M/N values. The DDI function gets enabled separately later in the
transcoder enabling sequence.

This fixes a slave transcoder getting stuck during enabling, leading
to page flip timeout errors on the corresponding pipe.

The spec requires the same programming step for ADLP+ platforms, that
will be addressed separately (on those platforms the above transcoder
getting stuck issue was not observed).

Bspec: 68849
Reviewed-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241030192313.4030617-2-imre.deak@intel.com

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This commit is contained in:

Imre Deak 2024-10-30 21:23:09 +02:00

parent 58193265d7

commit e203443c3a

3 changed files with 6 additions and 1 deletions

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2

drivers/gpu/drm/i915/display/intel_ddi.c

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drivers/gpu/drm/i915/display/intel_ddi.h

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drivers/gpu/drm/i915/display/intel_dp_mst.c

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