drm/i915: Don't read sprite LP2+ registers on ILK/SNB

Sprite LP2+ registers don't exist on ILK/SNB so don't read them.

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>

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 502897367c8cfb4e6f6c8dea3e1bb20c856edbb0..2091a9ce1375d1bf73b1ceed6e28d9e4236a4dca 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2664,8 +2664,10 @@ void ilk_wm_get_hw_state(struct drm_device *dev)
        hw->wm_lp[2] = I915_READ(WM3_LP_ILK);
 
        hw->wm_lp_spr[0] = I915_READ(WM1S_LP_ILK);
-       hw->wm_lp_spr[1] = I915_READ(WM2S_LP_IVB);
-       hw->wm_lp_spr[2] = I915_READ(WM3S_LP_IVB);
+       if (INTEL_INFO(dev)->gen >= 7) {
+               hw->wm_lp_spr[1] = I915_READ(WM2S_LP_IVB);
+               hw->wm_lp_spr[2] = I915_READ(WM3S_LP_IVB);
+       }
 
        if (IS_HASWELL(dev) || IS_BROADWELL(dev))
                hw->partitioning = (I915_READ(WM_MISC) & WM_MISC_DATA_PARTITION_5_6) ?