drm/i915/fdi: move intel_update_fdi_pll_freq to intel_fdi.c

Move FDI related functions to intel_fdi.c. Rename to have intel_fdi
prefix while at it.
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/da1609dfce4623f8ec86254aea6c2c8679b6a37f.1629906431.git.jani.nikula@intel.com

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

@@ -11546,22 +11546,6 @@ static void sanitize_watermarks(struct drm_i915_private *dev_priv)
 	drm_modeset_acquire_fini(&ctx);
 }
 
-static void intel_update_fdi_pll_freq(struct drm_i915_private *dev_priv)
-{
-	if (IS_IRONLAKE(dev_priv)) {
-		u32 fdi_pll_clk =
-			intel_de_read(dev_priv, FDI_PLL_BIOS_0) & FDI_PLL_FB_CLOCK_MASK;
-
-		dev_priv->fdi_pll_freq = (fdi_pll_clk + 2) * 10000;
-	} else if (IS_SANDYBRIDGE(dev_priv) || IS_IVYBRIDGE(dev_priv)) {
-		dev_priv->fdi_pll_freq = 270000;
-	} else {
-		return;
-	}
-
-	drm_dbg(&dev_priv->drm, "FDI PLL freq=%d\n", dev_priv->fdi_pll_freq);
-}
-
 static int intel_initial_commit(struct drm_device *dev)
 {
 	struct drm_atomic_state *state = NULL;
@@ -11815,7 +11799,7 @@ int intel_modeset_init_nogem(struct drm_i915_private *i915)
 
 	intel_plane_possible_crtcs_init(i915);
 	intel_shared_dpll_init(dev);
-	intel_update_fdi_pll_freq(i915);
+	intel_fdi_pll_freq_update(i915);
 
 	intel_update_czclk(i915);
 	intel_modeset_init_hw(i915);

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

@@ -95,6 +95,22 @@ static int ilk_check_fdi_lanes(struct drm_device *dev, enum pipe pipe,
 	}
 }
 
+void intel_fdi_pll_freq_update(struct drm_i915_private *i915)
+{
+	if (IS_IRONLAKE(i915)) {
+		u32 fdi_pll_clk =
+			intel_de_read(i915, FDI_PLL_BIOS_0) & FDI_PLL_FB_CLOCK_MASK;
+
+		i915->fdi_pll_freq = (fdi_pll_clk + 2) * 10000;
+	} else if (IS_SANDYBRIDGE(i915) || IS_IVYBRIDGE(i915)) {
+		i915->fdi_pll_freq = 270000;
+	} else {
+		return;
+	}
+
+	drm_dbg(&i915->drm, "FDI PLL freq=%d\n", i915->fdi_pll_freq);
+}
+
 int intel_fdi_link_freq(struct drm_i915_private *i915,
 			const struct intel_crtc_state *pipe_config)
 {

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

@@ -23,5 +23,6 @@ void ilk_fdi_pll_enable(const struct intel_crtc_state *crtc_state);
 void intel_fdi_init_hook(struct drm_i915_private *dev_priv);
 void hsw_fdi_link_train(struct intel_encoder *encoder,
 			const struct intel_crtc_state *crtc_state);
+void intel_fdi_pll_freq_update(struct drm_i915_private *i915);
 
 #endif