drm/i915/mst: Read out FEC state

The MST codepath is missing FEC readout. Add it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230502143906.2401-4-ville.syrjala@linux.intel.com
Reviewed-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Ville Syrjälä 2023-05-02 17:38:58 +03:00
commit cbbfe91508