[PATCH 8/8] drm/i915: protect FBC functions with FBC checks

[Paulo Zanoni <przanoni@gmail.com>]

From: Paulo Zanoni <paulo.r.zanoni@intel.com>

Now all the functions called by other files check whether FBC has been
initialized. This allows us to drop the checks on the static
functions.

v2:
 - s/HAS_FBC/dev_priv->display.enable_fbc/ everywhere but the init
   function (Chris).

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/intel_fbc.c | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)


I'm not 100% sure this is what Chris was asking for v2, so please clarify if
this is not what we want.


diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c
index cc9b7ef..65f08e3 100644
--- a/drivers/gpu/drm/i915/intel_fbc.c
+++ b/drivers/gpu/drm/i915/intel_fbc.c
@@ -388,9 +388,6 @@ static void intel_fbc_enable(struct drm_crtc *crtc)
 
 	WARN_ON(!mutex_is_locked(&dev_priv->fbc.lock));
 
-	if (!dev_priv->display.enable_fbc)
-		return;
-
 	intel_fbc_cancel_work(dev_priv);
 
 	work = kzalloc(sizeof(*work), GFP_KERNEL);
@@ -430,9 +427,6 @@ static void __intel_fbc_disable(struct drm_device *dev)
 
 	intel_fbc_cancel_work(dev_priv);
 
-	if (!dev_priv->display.disable_fbc)
-		return;
-
 	dev_priv->display.disable_fbc(dev);
 	dev_priv->fbc.crtc = NULL;
 }
@@ -447,6 +441,9 @@ void intel_fbc_disable(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
+	if (!dev_priv->display.enable_fbc)
+		return;
+
 	mutex_lock(&dev_priv->fbc.lock);
 	__intel_fbc_disable(dev);
 	mutex_unlock(&dev_priv->fbc.lock);
@@ -463,6 +460,9 @@ void intel_fbc_disable_crtc(struct intel_crtc *crtc)
 	struct drm_device *dev = crtc->base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
+	if (!dev_priv->display.enable_fbc)
+		return;
+
 	mutex_lock(&dev_priv->fbc.lock);
 	if (dev_priv->fbc.crtc == crtc)
 		__intel_fbc_disable(dev);
@@ -661,6 +661,9 @@ void intel_fbc_cleanup_cfb(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
+	if (!dev_priv->display.enable_fbc)
+		return;
+
 	mutex_lock(&dev_priv->fbc.lock);
 	__intel_fbc_cleanup_cfb(dev);
 	mutex_unlock(&dev_priv->fbc.lock);
@@ -708,9 +711,6 @@ static void __intel_fbc_update(struct drm_device *dev)
 	const struct drm_display_mode *adjusted_mode;
 	unsigned int max_width, max_height;
 
-	if (!HAS_FBC(dev))
-		return;
-
 	WARN_ON(!mutex_is_locked(&dev_priv->fbc.lock));
 
 	/* disable framebuffer compression in vGPU */
@@ -857,6 +857,9 @@ void intel_fbc_update(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
+	if (!dev_priv->display.enable_fbc)
+		return;
+
 	mutex_lock(&dev_priv->fbc.lock);
 	__intel_fbc_update(dev);
 	mutex_unlock(&dev_priv->fbc.lock);
@@ -869,6 +872,9 @@ void intel_fbc_invalidate(struct drm_i915_private *dev_priv,
 	struct drm_device *dev = dev_priv->dev;
 	unsigned int fbc_bits;
 
+	if (!dev_priv->display.enable_fbc)
+		return;
+
 	if (origin == ORIGIN_GTT)
 		return;
 
@@ -895,6 +901,9 @@ void intel_fbc_flush(struct drm_i915_private *dev_priv,
 {
 	struct drm_device *dev = dev_priv->dev;
 
+	if (!dev_priv->display.enable_fbc)
+		return;
+
 	mutex_lock(&dev_priv->fbc.lock);
 
 	if (!dev_priv->fbc.busy_bits)
-- 
2.1.4

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