drm/i915/dp: Have intel_dp_get_adjust_train() tell us if anything changed

In order to implement the POST_LT_ADJ_REQ sequence we need to
know whether the sink actually requested a changed to the
vswing/pre-emph values.

Tested-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250710201718.25310-5-ville.syrjala@linux.intel.com
This commit is contained in:
Ville Syrjälä 2025-07-10 23:17:15 +03:00
commit b840bb0b7e
2 changed files with 14 additions and 6 deletions