drm/i915/fdi: move fdi bc bifurcation functions to intel_fdi.c

Move FDI related functions to intel_fdi.c. Don't bother with renaming as
we'll make the functions static shortly.
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/fd8afe4876f0b0762a9c69e01762a8dba31349e5.1629906431.git.jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_display.c

@@ -2010,55 +2010,6 @@ static void ilk_pch_transcoder_set_timings(const struct intel_crtc_state *crtc_s
 		       intel_de_read(dev_priv, VSYNCSHIFT(cpu_transcoder)));
 }
 
-static void cpt_set_fdi_bc_bifurcation(struct drm_i915_private *dev_priv, bool enable)
-{
-	u32 temp;
-
-	temp = intel_de_read(dev_priv, SOUTH_CHICKEN1);
-	if (!!(temp & FDI_BC_BIFURCATION_SELECT) == enable)
-		return;
-
-	drm_WARN_ON(&dev_priv->drm,
-		    intel_de_read(dev_priv, FDI_RX_CTL(PIPE_B)) &
-		    FDI_RX_ENABLE);
-	drm_WARN_ON(&dev_priv->drm,
-		    intel_de_read(dev_priv, FDI_RX_CTL(PIPE_C)) &
-		    FDI_RX_ENABLE);
-
-	temp &= ~FDI_BC_BIFURCATION_SELECT;
-	if (enable)
-		temp |= FDI_BC_BIFURCATION_SELECT;
-
-	drm_dbg_kms(&dev_priv->drm, "%sabling fdi C rx\n",
-		    enable ? "en" : "dis");
-	intel_de_write(dev_priv, SOUTH_CHICKEN1, temp);
-	intel_de_posting_read(dev_priv, SOUTH_CHICKEN1);
-}
-
-static void ivb_update_fdi_bc_bifurcation(const struct intel_crtc_state *crtc_state)
-{
-	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
-	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
-
-	switch (crtc->pipe) {
-	case PIPE_A:
-		break;
-	case PIPE_B:
-		if (crtc_state->fdi_lanes > 2)
-			cpt_set_fdi_bc_bifurcation(dev_priv, false);
-		else
-			cpt_set_fdi_bc_bifurcation(dev_priv, true);
-
-		break;
-	case PIPE_C:
-		cpt_set_fdi_bc_bifurcation(dev_priv, true);
-
-		break;
-	default:
-		BUG();
-	}
-}
-
 /*
  * Finds the encoder associated with the given CRTC. This can only be
  * used when we know that the CRTC isn't feeding multiple encoders!

drivers/gpu/drm/i915/display/intel_fdi.c

@@ -170,6 +170,55 @@ int ilk_fdi_compute_config(struct intel_crtc *crtc,
 	return ret;
 }
 
+static void cpt_set_fdi_bc_bifurcation(struct drm_i915_private *dev_priv, bool enable)
+{
+	u32 temp;
+
+	temp = intel_de_read(dev_priv, SOUTH_CHICKEN1);
+	if (!!(temp & FDI_BC_BIFURCATION_SELECT) == enable)
+		return;
+
+	drm_WARN_ON(&dev_priv->drm,
+		    intel_de_read(dev_priv, FDI_RX_CTL(PIPE_B)) &
+		    FDI_RX_ENABLE);
+	drm_WARN_ON(&dev_priv->drm,
+		    intel_de_read(dev_priv, FDI_RX_CTL(PIPE_C)) &
+		    FDI_RX_ENABLE);
+
+	temp &= ~FDI_BC_BIFURCATION_SELECT;
+	if (enable)
+		temp |= FDI_BC_BIFURCATION_SELECT;
+
+	drm_dbg_kms(&dev_priv->drm, "%sabling fdi C rx\n",
+		    enable ? "en" : "dis");
+	intel_de_write(dev_priv, SOUTH_CHICKEN1, temp);
+	intel_de_posting_read(dev_priv, SOUTH_CHICKEN1);
+}
+
+void ivb_update_fdi_bc_bifurcation(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	switch (crtc->pipe) {
+	case PIPE_A:
+		break;
+	case PIPE_B:
+		if (crtc_state->fdi_lanes > 2)
+			cpt_set_fdi_bc_bifurcation(dev_priv, false);
+		else
+			cpt_set_fdi_bc_bifurcation(dev_priv, true);
+
+		break;
+	case PIPE_C:
+		cpt_set_fdi_bc_bifurcation(dev_priv, true);
+
+		break;
+	default:
+		BUG();
+	}
+}
+
 void intel_fdi_normal_train(struct intel_crtc *crtc)
 {
 	struct drm_device *dev = crtc->base.dev;

drivers/gpu/drm/i915/display/intel_fdi.h

@@ -16,6 +16,7 @@ int intel_fdi_link_freq(struct drm_i915_private *i915,
 			const struct intel_crtc_state *pipe_config);
 int ilk_fdi_compute_config(struct intel_crtc *intel_crtc,
 			   struct intel_crtc_state *pipe_config);
+void ivb_update_fdi_bc_bifurcation(const struct intel_crtc_state *crtc_state);
 void intel_fdi_normal_train(struct intel_crtc *crtc);
 void ilk_fdi_disable(struct intel_crtc *crtc);
 void ilk_fdi_pll_disable(struct intel_crtc *intel_crtc);