drm/i915: Check 5/6 DDB split only when sprites are enabled

Using the 5/6 DDB split make sense only when sprites are enabled.
So check that before we waste any cycles computing the merged
watermarks with the 5/6 DDB split.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index cdd78f69a28b..8064ff927bcc 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2931,7 +2931,8 @@ static void haswell_update_wm(struct drm_crtc *crtc)
         ilk_wm_merge(dev, &max, &lp_wm_1_2);
 
         /* 5/6 split only in single pipe config on IVB+ */
-        if (INTEL_INFO(dev)->gen >= 7 && config.num_pipes_active == 1) {
+        if (INTEL_INFO(dev)->gen >= 7 &&
+            config.num_pipes_active == 1 && config.sprites_enabled) {
                 ilk_compute_wm_maximums(dev, 1, &config, INTEL_DDB_PART_5_6, &max);
                 ilk_wm_merge(dev, &max, &lp_wm_5_6);