drm/i915: Export the generic, not arch specific, intel_update_watermarks()

Rather than export every single architecture specific update_wm, just
export the wrapper around the display vtable.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_display.c

@@ -45,7 +45,6 @@
 #define HAS_eDP (intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))
 
 bool intel_pipe_has_type(struct drm_crtc *crtc, int type);
-static void intel_update_watermarks(struct drm_device *dev);
 static void intel_increase_pllclock(struct drm_crtc *crtc);
 static void intel_crtc_update_cursor(struct drm_crtc *crtc, bool on);
 
@@ -4820,7 +4819,7 @@ static void ironlake_update_wm(struct drm_device *dev)
 	 */
 }
 
-void sandybridge_update_wm(struct drm_device *dev)
+static void sandybridge_update_wm(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	int latency = SNB_READ_WM0_LATENCY() * 100;	/* In unit 0.1us */
@@ -5125,7 +5124,7 @@ static void sandybridge_update_sprite_wm(struct drm_device *dev, int pipe,
  * We don't use the sprite, so we can ignore that.  And on Crestline we have
  * to set the non-SR watermarks to 8.
  */
-static void intel_update_watermarks(struct drm_device *dev)
+void intel_update_watermarks(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 

drivers/gpu/drm/i915/intel_drv.h

@@ -422,7 +422,7 @@ extern void intel_write_eld(struct drm_encoder *encoder,
 extern void intel_cpt_verify_modeset(struct drm_device *dev, int pipe);
 
 /* For use by IVB LP watermark workaround in intel_sprite.c */
-extern void sandybridge_update_wm(struct drm_device *dev);
+extern void intel_update_watermarks(struct drm_device *dev);
 extern void intel_update_sprite_watermarks(struct drm_device *dev, int pipe,
 					   uint32_t sprite_width,
 					   int pixel_size);

drivers/gpu/drm/i915/intel_sprite.c

@@ -112,13 +112,13 @@ ivb_update_plane(struct drm_plane *plane, struct drm_framebuffer *fb,
 	 */
 	if (crtc_w != src_w || crtc_h != src_h) {
 		dev_priv->sprite_scaling_enabled = true;
-		sandybridge_update_wm(dev);
+		intel_update_watermarks(dev);
 		intel_wait_for_vblank(dev, pipe);
 		sprscale = SPRITE_SCALE_ENABLE | (src_w << 16) | src_h;
 	} else {
 		dev_priv->sprite_scaling_enabled = false;
 		/* potentially re-enable LP watermarks */
-		sandybridge_update_wm(dev);
+		intel_update_watermarks(dev);
 	}
 
 	I915_WRITE(SPRSTRIDE(pipe), fb->pitches[0]);