drm/i915/dp_link_caps: Add filter for enabled link configurations

Add a filter for enabled link configurations to the link capability
state.

This allows fallback code to disable only the configuration that failed
link training, instead of constraining later modesets via maximum link
rate or lane count. The code only needs to exclude the failed
configuration from the allowed set; all other supported configurations
remain available.

Use the filter when computing the allowed configuration set and when
validating maximum link limits.

Follow-up changes will switch the fallback code to disable individual
configurations through this filter.

v2:
- Rebase on changes using a filter object instead of a mask of
  configuration indices.
- Track the enabled configurations instead of the disabled ones.

Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20260701153204.4124150-8-imre.deak@intel.com

0 files changed, 0 insertions, 0 deletions