drm/i915/dsi: move wait_for_dsi_fifo_empty to intel_dsi.c

wait_for_dsi_fifo_empty can be static in intel_dsi.c. No functional
changes.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-By: Shobhit Kumar <shobhit.kumar@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_dsi.c

@@ -42,6 +42,22 @@ static const struct intel_dsi_device intel_dsi_devices[] = {
 	},
 };
 
+static void wait_for_dsi_fifo_empty(struct intel_dsi *intel_dsi)
+{
+	struct drm_encoder *encoder = &intel_dsi->base.base;
+	struct drm_device *dev = encoder->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
+	enum port port = intel_dsi_pipe_to_port(intel_crtc->pipe);
+	u32 mask;
+
+	mask = LP_CTRL_FIFO_EMPTY | HS_CTRL_FIFO_EMPTY |
+		LP_DATA_FIFO_EMPTY | HS_DATA_FIFO_EMPTY;
+
+	if (wait_for((I915_READ(MIPI_GEN_FIFO_STAT(port)) & mask) == mask, 100))
+		DRM_ERROR("DPI FIFOs are not empty\n");
+}
+
 static void band_gap_reset(struct drm_i915_private *dev_priv)
 {
 	mutex_lock(&dev_priv->dpio_lock);

drivers/gpu/drm/i915/intel_dsi_cmd.c

@@ -408,19 +408,3 @@ int dpi_send_cmd(struct intel_dsi *intel_dsi, u32 cmd, bool hs, enum port port)
 
 	return 0;
 }
-
-void wait_for_dsi_fifo_empty(struct intel_dsi *intel_dsi)
-{
-	struct drm_encoder *encoder = &intel_dsi->base.base;
-	struct drm_device *dev = encoder->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
-	enum port port = intel_dsi_pipe_to_port(intel_crtc->pipe);
-	u32 mask;
-
-	mask = LP_CTRL_FIFO_EMPTY | HS_CTRL_FIFO_EMPTY |
-		LP_DATA_FIFO_EMPTY | HS_DATA_FIFO_EMPTY;
-
-	if (wait_for((I915_READ(MIPI_GEN_FIFO_STAT(port)) & mask) == mask, 100))
-		DRM_ERROR("DPI FIFOs are not empty\n");
-}

drivers/gpu/drm/i915/intel_dsi_cmd.h

@@ -52,7 +52,6 @@ int dsi_vc_generic_read(struct intel_dsi *intel_dsi, int channel,
 		u8 *reqdata, int reqlen, u8 *buf, int buflen, enum port port);
 
 int dpi_send_cmd(struct intel_dsi *intel_dsi, u32 cmd, bool hs, enum port port);
-void wait_for_dsi_fifo_empty(struct intel_dsi *intel_dsi);
 
 /* XXX: questionable write helpers */
 static inline int dsi_vc_dcs_write_0(struct intel_dsi *intel_dsi,