drm/i915/dp_link_caps: Validate max link limits

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Add validation in intel_dp_link_caps_set_max_limits() to ensure that
the new maximum rate and lane count leave at least one allowed
configuration.

The validation takes disabled configurations and active forced
parameters into account. Disabled configurations are not supported yet,
so that part has no effect for now.

At the moment this validation is also performed by the link training
fallback code, but that will be removed later, leaving only the link
caps module to perform the validation added in this patch.

v2: Rebase on changes using a filter object instead of a mask of
    configuration indices.

Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20260701153204.4124150-7-imre.deak@intel.com

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Imre Deak 2026-07-01 18:31:35 +03:00

parent 9d4bd6654e

commit e5cd9e1788

1 changed files with 27 additions and 1 deletions

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

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