drm/i915: kill pc8.disable_count

Since after the latest patches it's only being used to prevent
getting/putting the runtime PM refcount.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_debugfs.c

@@ -2014,7 +2014,6 @@ static int i915_pc8_status(struct seq_file *m, void *unused)
 
 	mutex_lock(&dev_priv->pc8.lock);
 	seq_printf(m, "GPU idle: %s\n", yesno(!dev_priv->mm.busy));
-	seq_printf(m, "Disable count: %d\n", dev_priv->pc8.disable_count);
 	seq_printf(m, "IRQs disabled: %s\n",
 		   yesno(dev_priv->pc8.irqs_disabled));
 	seq_printf(m, "Enabled: %s\n", yesno(dev_priv->pc8.enabled));

drivers/gpu/drm/i915/i915_drv.h

@@ -1393,7 +1393,6 @@ struct i915_package_c8 {
 	bool irqs_disabled;
 	/* Only true after the delayed work task actually enables it. */
 	bool enabled;
-	int disable_count;
 	struct mutex lock;
 
 	struct {

drivers/gpu/drm/i915/intel_display.c

@@ -7049,13 +7049,6 @@ void __hsw_do_enable_pc8(struct drm_i915_private *dev_priv)
 static void __hsw_enable_package_c8(struct drm_i915_private *dev_priv)
 {
 	WARN_ON(!mutex_is_locked(&dev_priv->pc8.lock));
-	WARN(dev_priv->pc8.disable_count < 1,
-	     "pc8.disable_count: %d\n", dev_priv->pc8.disable_count);
-
-	dev_priv->pc8.disable_count--;
-	if (dev_priv->pc8.disable_count != 0)
-		return;
-
 	intel_runtime_pm_put(dev_priv);
 }
 
@@ -7089,13 +7082,6 @@ void __hsw_do_disable_pc8(struct drm_i915_private *dev_priv)
 static void __hsw_disable_package_c8(struct drm_i915_private *dev_priv)
 {
 	WARN_ON(!mutex_is_locked(&dev_priv->pc8.lock));
-	WARN(dev_priv->pc8.disable_count < 0,
-	     "pc8.disable_count: %d\n", dev_priv->pc8.disable_count);
-
-	dev_priv->pc8.disable_count++;
-	if (dev_priv->pc8.disable_count != 1)
-		return;
-
 	intel_runtime_pm_get(dev_priv);
 }
 

drivers/gpu/drm/i915/intel_pm.c

@@ -6165,7 +6165,6 @@ void intel_pm_setup(struct drm_device *dev)
 	mutex_init(&dev_priv->pc8.lock);
 	dev_priv->pc8.irqs_disabled = false;
 	dev_priv->pc8.enabled = false;
-	dev_priv->pc8.disable_count = 0;
 	INIT_DELAYED_WORK(&dev_priv->rps.delayed_resume_work,
 			  intel_gen6_powersave_work);
 }