drm/i915: split fdi link training from display vtable.

It may make sense to merge this with display again later,
however the fdi use of the vtable is limited to only a
few generations.
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/7af7359b6cec33bd2d32152893d9a1e8f8cf7f21.1632869550.git.jani.nikula@intel.com

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

@@ -15,7 +15,7 @@ void intel_fdi_link_train(struct intel_crtc *crtc,
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 
-	dev_priv->display.fdi_link_train(crtc, crtc_state);
+	dev_priv->fdi_funcs.fdi_link_train(crtc, crtc_state);
 }
 
 /* units of 100MHz */
@@ -1017,11 +1017,11 @@ void
 intel_fdi_init_hook(struct drm_i915_private *dev_priv)
 {
 	if (IS_IRONLAKE(dev_priv)) {
-		dev_priv->display.fdi_link_train = ilk_fdi_link_train;
+		dev_priv->fdi_funcs.fdi_link_train = ilk_fdi_link_train;
 	} else if (IS_SANDYBRIDGE(dev_priv)) {
-		dev_priv->display.fdi_link_train = gen6_fdi_link_train;
+		dev_priv->fdi_funcs.fdi_link_train = gen6_fdi_link_train;
 	} else if (IS_IVYBRIDGE(dev_priv)) {
 		/* FIXME: detect B0+ stepping and use auto training */
-		dev_priv->display.fdi_link_train = ivb_manual_fdi_link_train;
+		dev_priv->fdi_funcs.fdi_link_train = ivb_manual_fdi_link_train;
 	}
 }

drivers/gpu/drm/i915/i915_drv.h

@@ -388,6 +388,11 @@ struct intel_hotplug_funcs {
 	void (*hpd_irq_setup)(struct drm_i915_private *dev_priv);
 };
 
+struct intel_fdi_funcs {
+	void (*fdi_link_train)(struct intel_crtc *crtc,
+			       const struct intel_crtc_state *crtc_state);
+};
+
 struct drm_i915_display_funcs {
 	/* Returns the active state of the crtc, and if the crtc is active,
 	 * fills out the pipe-config with the hw state. */
@@ -403,9 +408,6 @@ struct drm_i915_display_funcs {
 	void (*commit_modeset_enables)(struct intel_atomic_state *state);
 	void (*commit_modeset_disables)(struct intel_atomic_state *state);
 
-	void (*fdi_link_train)(struct intel_crtc *crtc,
-			       const struct intel_crtc_state *crtc_state);
-
 	/* clock updates for mode set */
 	/* cursor updates */
 	/* render clock increase/decrease */
@@ -985,6 +987,9 @@ struct drm_i915_private {
 	/* irq display functions */
 	struct intel_hotplug_funcs hotplug_funcs;
 
+	/* fdi display functions */
+	struct intel_fdi_funcs fdi_funcs;
+
 	/* Display functions */
 	struct drm_i915_display_funcs display;