drm/i915: Fix VLV forcewake after reset

Use the render/media specific forcewake counts to properly restore the
forcewake status after a GPU reset on VLV.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Deepak S <deepak.s@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index e5ee656..ba465f9 100644 (file)
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -982,10 +982,22 @@ static int gen6_do_reset(struct drm_device *dev)
        intel_uncore_forcewake_reset(dev);
 
        /* If reset with a user forcewake, try to restore, otherwise turn it off */
-       if (dev_priv->uncore.forcewake_count)
-               dev_priv->uncore.funcs.force_wake_get(dev_priv, FORCEWAKE_ALL);
-       else
-               dev_priv->uncore.funcs.force_wake_put(dev_priv, FORCEWAKE_ALL);
+       if (IS_VALLEYVIEW(dev)) {
+               if (dev_priv->uncore.fw_rendercount)
+                       dev_priv->uncore.funcs.force_wake_get(dev_priv, FORCEWAKE_RENDER);
+               else
+                       dev_priv->uncore.funcs.force_wake_put(dev_priv, FORCEWAKE_RENDER);
+
+               if (dev_priv->uncore.fw_mediacount)
+                       dev_priv->uncore.funcs.force_wake_get(dev_priv, FORCEWAKE_MEDIA);
+               else
+                       dev_priv->uncore.funcs.force_wake_put(dev_priv, FORCEWAKE_MEDIA);
+       } else {
+               if (dev_priv->uncore.forcewake_count)
+                       dev_priv->uncore.funcs.force_wake_get(dev_priv, FORCEWAKE_ALL);
+               else
+                       dev_priv->uncore.funcs.force_wake_put(dev_priv, FORCEWAKE_ALL);
+       }
 
        /* Restore fifo count */
        dev_priv->uncore.fifo_count = __raw_i915_read32(dev_priv, GTFIFOCTL) & GT_FIFO_FREE_ENTRIES_MASK;