drm/i915: add cherryview specfic forcewake in execlists_elsp_write

In chv, we have two power wells Render & Media. We need to use
corresponsing forcewake count. If we dont follow this we are getting
error "*ERROR*: Timed out waiting for forcewake old ack to clear" due to
multiple entry into __vlv_force_wake_get.

Signed-off-by: Deepak S <deepak.s@linux.intel.com>
Requested-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index bd1b28d..bafd38b 100644 (file)
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -300,8 +300,18 @@ static void execlists_elsp_write(struct intel_engine_cs *ring,
         * Instead, we do the runtime_pm_get/put when creating/destroying requests.
         */
        spin_lock_irqsave(&dev_priv->uncore.lock, flags);
-       if (dev_priv->uncore.forcewake_count++ == 0)
-               dev_priv->uncore.funcs.force_wake_get(dev_priv, FORCEWAKE_ALL);
+       if (IS_CHERRYVIEW(dev_priv->dev)) {
+               if (dev_priv->uncore.fw_rendercount++ == 0)
+                       dev_priv->uncore.funcs.force_wake_get(dev_priv,
+                                                             FORCEWAKE_RENDER);
+               if (dev_priv->uncore.fw_mediacount++ == 0)
+                       dev_priv->uncore.funcs.force_wake_get(dev_priv,
+                                                             FORCEWAKE_MEDIA);
+       } else {
+               if (dev_priv->uncore.forcewake_count++ == 0)
+                       dev_priv->uncore.funcs.force_wake_get(dev_priv,
+                                                             FORCEWAKE_ALL);
+       }
        spin_unlock_irqrestore(&dev_priv->uncore.lock, flags);
 
        I915_WRITE(RING_ELSP(ring), desc[1]);
@@ -315,8 +325,19 @@ static void execlists_elsp_write(struct intel_engine_cs *ring,
 
        /* Release Force Wakeup (see the big comment above). */
        spin_lock_irqsave(&dev_priv->uncore.lock, flags);
-       if (--dev_priv->uncore.forcewake_count == 0)
-               dev_priv->uncore.funcs.force_wake_put(dev_priv, FORCEWAKE_ALL);
+       if (IS_CHERRYVIEW(dev_priv->dev)) {
+               if (--dev_priv->uncore.fw_rendercount == 0)
+                       dev_priv->uncore.funcs.force_wake_put(dev_priv,
+                                                             FORCEWAKE_RENDER);
+               if (--dev_priv->uncore.fw_mediacount == 0)
+                       dev_priv->uncore.funcs.force_wake_put(dev_priv,
+                                                             FORCEWAKE_MEDIA);
+       } else {
+               if (--dev_priv->uncore.forcewake_count == 0)
+                       dev_priv->uncore.funcs.force_wake_put(dev_priv,
+                                                             FORCEWAKE_ALL);
+       }
+
        spin_unlock_irqrestore(&dev_priv->uncore.lock, flags);
 }