drm/i915: Only export the generic intel_disable_fbc() interface

As the enable/disable routines will be gain additional complexity in
future patches, it is necessary that all callers do not bypass the
generic interface by calling into the chipset routines directly. to do
this we make the chipset routines static, so there is no choice.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Keith Packard <keithp@keithp.com>

drivers/gpu/drm/i915/i915_dma.c

@@ -1073,6 +1073,9 @@ static void i915_setup_compression(struct drm_device *dev, int size)
 	unsigned long cfb_base;
 	unsigned long ll_base = 0;
 
+	/* Just in case the BIOS is doing something questionable. */
+	intel_disable_fbc(dev);
+
 	compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, size, 4096, 0);
 	if (compressed_fb)
 		compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
@@ -1099,7 +1102,6 @@ static void i915_setup_compression(struct drm_device *dev, int size)
 
 	dev_priv->cfb_size = size;
 
-	intel_disable_fbc(dev);
 	dev_priv->compressed_fb = compressed_fb;
 	if (HAS_PCH_SPLIT(dev))
 		I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start);

drivers/gpu/drm/i915/i915_drv.h

@@ -1289,12 +1289,8 @@ extern void intel_modeset_init(struct drm_device *dev);
 extern void intel_modeset_gem_init(struct drm_device *dev);
 extern void intel_modeset_cleanup(struct drm_device *dev);
 extern int intel_modeset_vga_set_state(struct drm_device *dev, bool state);
-extern void i8xx_disable_fbc(struct drm_device *dev);
-extern void g4x_disable_fbc(struct drm_device *dev);
-extern void ironlake_disable_fbc(struct drm_device *dev);
-extern void intel_disable_fbc(struct drm_device *dev);
-extern void intel_enable_fbc(struct drm_crtc *crtc, unsigned long interval);
 extern bool intel_fbc_enabled(struct drm_device *dev);
+extern void intel_disable_fbc(struct drm_device *dev);
 extern bool ironlake_set_drps(struct drm_device *dev, u8 val);
 extern void ironlake_enable_rc6(struct drm_device *dev);
 extern void gen6_set_rps(struct drm_device *dev, u8 val);

drivers/gpu/drm/i915/i915_suspend.c

@@ -760,15 +760,13 @@ static void i915_restore_display(struct drm_device *dev)
 	/* FIXME: restore TV & SDVO state */
 
 	/* only restore FBC info on the platform that supports FBC*/
+	intel_disable_fbc(dev);
 	if (I915_HAS_FBC(dev)) {
 		if (HAS_PCH_SPLIT(dev)) {
-			ironlake_disable_fbc(dev);
 			I915_WRITE(ILK_DPFC_CB_BASE, dev_priv->saveDPFC_CB_BASE);
 		} else if (IS_GM45(dev)) {
-			g4x_disable_fbc(dev);
 			I915_WRITE(DPFC_CB_BASE, dev_priv->saveDPFC_CB_BASE);
 		} else {
-			i8xx_disable_fbc(dev);
 			I915_WRITE(FBC_CFB_BASE, dev_priv->saveFBC_CFB_BASE);
 			I915_WRITE(FBC_LL_BASE, dev_priv->saveFBC_LL_BASE);
 			I915_WRITE(FBC_CONTROL2, dev_priv->saveFBC_CONTROL2);

drivers/gpu/drm/i915/intel_display.c

@@ -1384,6 +1384,28 @@ static void intel_disable_pch_ports(struct drm_i915_private *dev_priv,
 	disable_pch_hdmi(dev_priv, pipe, HDMID);
 }
 
+static void i8xx_disable_fbc(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	u32 fbc_ctl;
+
+	/* Disable compression */
+	fbc_ctl = I915_READ(FBC_CONTROL);
+	if ((fbc_ctl & FBC_CTL_EN) == 0)
+		return;
+
+	fbc_ctl &= ~FBC_CTL_EN;
+	I915_WRITE(FBC_CONTROL, fbc_ctl);
+
+	/* Wait for compressing bit to clear */
+	if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10)) {
+		DRM_DEBUG_KMS("FBC idle timed out\n");
+		return;
+	}
+
+	DRM_DEBUG_KMS("disabled FBC\n");
+}
+
 static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
 {
 	struct drm_device *dev = crtc->dev;
@@ -1439,28 +1461,6 @@ static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
 		      dev_priv->cfb_pitch, crtc->y, dev_priv->cfb_plane);
 }
 
-void i8xx_disable_fbc(struct drm_device *dev)
-{
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	u32 fbc_ctl;
-
-	/* Disable compression */
-	fbc_ctl = I915_READ(FBC_CONTROL);
-	if ((fbc_ctl & FBC_CTL_EN) == 0)
-		return;
-
-	fbc_ctl &= ~FBC_CTL_EN;
-	I915_WRITE(FBC_CONTROL, fbc_ctl);
-
-	/* Wait for compressing bit to clear */
-	if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10)) {
-		DRM_DEBUG_KMS("FBC idle timed out\n");
-		return;
-	}
-
-	DRM_DEBUG_KMS("disabled FBC\n");
-}
-
 static bool i8xx_fbc_enabled(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
@@ -1516,7 +1516,7 @@ static void g4x_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
 	DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane);
 }
 
-void g4x_disable_fbc(struct drm_device *dev)
+static void g4x_disable_fbc(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	u32 dpfc_ctl;
@@ -1616,7 +1616,7 @@ static void ironlake_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
 	DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane);
 }
 
-void ironlake_disable_fbc(struct drm_device *dev)
+static void ironlake_disable_fbc(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	u32 dpfc_ctl;
@@ -1648,7 +1648,7 @@ bool intel_fbc_enabled(struct drm_device *dev)
 	return dev_priv->display.fbc_enabled(dev);
 }
 
-void intel_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
+static void intel_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
 {
 	struct drm_i915_private *dev_priv = crtc->dev->dev_private;