The '!' here was not intended.  Since '!' has higher precedence than
compare, it means the check is never true.
This regression was introduced in
commit 
71fff20ff1bb790f4defe0c880e028581ffab420
Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date:   Tue Aug 6 22:24:03 2013 +0300
    drm/i915: Kill fbc_enable from hsw_lp_wm_results
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
         * a WM level. */
        results->enable_fbc_wm = true;
        for (level = 1; level <= max_level; level++) {
-               if (!lp_results[level - 1].fbc_val > lp_maximums->fbc) {
+               if (lp_results[level - 1].fbc_val > lp_maximums->fbc) {
                        results->enable_fbc_wm = false;
                        lp_results[level - 1].fbc_val = 0;
                }