drm/i915/icl: Prevent incorrect DBuf enabling

[linux-2.6-microblaze.git] / drivers / gpu / drm / i915 / intel_pm.c

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 9c97a95..bece16a 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3624,7 +3624,12 @@ static u8 intel_enabled_dbuf_slices_num(struct drm_i915_private *dev_priv)
        if (INTEL_GEN(dev_priv) < 11)
                return enabled_slices;
 
-       if (I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE)
+       /*
+        * FIXME: for now we'll only ever use 1 slice; pretend that we have
+        * only that 1 slice enabled until we have a proper way for on-demand
+        * toggling of the second slice.
+        */
+       if (0 && I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE)
                enabled_slices++;
 
        return enabled_slices;