drm/i915: Rename intel_flush_display_plane to intel_flush_primary_plane

The intel_flush_primary_plane name actually tells us which plane
we're talking about.

Also reorganize the internals a bit and add a missing POSTING_READ()
to make sure the hardware has seen the changes by the time we
return from the function.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

4 files changed, 12 insertions, 12 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index fdaa672f148a..985c389e14ef 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1812,13 +1812,13 @@ static void intel_disable_pipe(struct drm_i915_private *dev_priv,
  * Plane regs are double buffered, going from enabled->disabled needs a
  * trigger in order to latch.  The display address reg provides this.
  */
-void intel_flush_display_plane(struct drm_i915_private *dev_priv,
-                                      enum plane plane)
+void intel_flush_primary_plane(struct drm_i915_private *dev_priv,
+                               enum plane plane)
 {
-        if (dev_priv->info->gen >= 4)
-                I915_WRITE(DSPSURF(plane), I915_READ(DSPSURF(plane)));
-        else
-                I915_WRITE(DSPADDR(plane), I915_READ(DSPADDR(plane)));
+        u32 reg = dev_priv->info->gen >= 4 ? DSPSURF(plane) : DSPADDR(plane);
+
+        I915_WRITE(reg, I915_READ(reg));
+        POSTING_READ(reg);
 }
 
 /**
@@ -1848,7 +1848,7 @@ static void intel_enable_plane(struct drm_i915_private *dev_priv,
                 return;
 
         I915_WRITE(reg, val | DISPLAY_PLANE_ENABLE);
-        intel_flush_display_plane(dev_priv, plane);
+        intel_flush_primary_plane(dev_priv, plane);
         intel_wait_for_vblank(dev_priv->dev, pipe);
 }
 
@@ -1876,7 +1876,7 @@ static void intel_disable_plane(struct drm_i915_private *dev_priv,
                 return;
 
         I915_WRITE(reg, val & ~DISPLAY_PLANE_ENABLE);
-        intel_flush_display_plane(dev_priv, plane);
+        intel_flush_primary_plane(dev_priv, plane);
         intel_wait_for_vblank(dev_priv->dev, pipe);
 }
 
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 55c8bc4b7d9f..dea20ce65e59 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -811,7 +811,7 @@ bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg, bool is_sdvob);
 
 /* intel_sprite.c */
 int intel_plane_init(struct drm_device *dev, enum pipe pipe, int plane);
-void intel_flush_display_plane(struct drm_i915_private *dev_priv,
+void intel_flush_primary_plane(struct drm_i915_private *dev_priv,
                                enum plane plane);
 void intel_plane_restore(struct drm_plane *plane);
 void intel_plane_disable(struct drm_plane *plane);
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 008ec0bb017f..da24825acc84 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4773,7 +4773,7 @@ static void g4x_disable_trickle_feed(struct drm_device *dev)
                 I915_WRITE(DSPCNTR(pipe),
                            I915_READ(DSPCNTR(pipe)) |
                            DISPPLANE_TRICKLE_FEED_DISABLE);
-                intel_flush_display_plane(dev_priv, pipe);
+                intel_flush_primary_plane(dev_priv, pipe);
         }
 }
 
diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index d61aec23a523..18c406246a2d 100644
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -1094,7 +1094,7 @@ static void intel_tv_mode_set(struct intel_encoder *encoder)
                 unsigned int xsize, ysize;
                 /* Pipe must be off here */
                 I915_WRITE(dspcntr_reg, dspcntr & ~DISPLAY_PLANE_ENABLE);
-                intel_flush_display_plane(dev_priv, intel_crtc->plane);
+                intel_flush_primary_plane(dev_priv, intel_crtc->plane);
 
                 /* Wait for vblank for the disable to take effect */
                 if (IS_GEN2(dev))
@@ -1123,7 +1123,7 @@ static void intel_tv_mode_set(struct intel_encoder *encoder)
 
                 I915_WRITE(pipeconf_reg, pipeconf);
                 I915_WRITE(dspcntr_reg, dspcntr);
-                intel_flush_display_plane(dev_priv, intel_crtc->plane);
+                intel_flush_primary_plane(dev_priv, intel_crtc->plane);
         }
 
         j = 0;