drm/i915/display: hide workaround for broken vbt in intel_bios.c

Instead of poluting the normal code path in intel_display.c, make
intel_bios.c handle the brokenness of the VBT.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210430223808.1078010-5-lucas.demarchi@intel.com

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

@@ -1852,6 +1852,19 @@ intel_bios_encoder_supports_edp(const struct intel_bios_encoder_data *devdata)
 		devdata->child.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR;
 }
 
+static bool is_port_valid(struct drm_i915_private *i915, enum port port)
+{
+	/*
+	 * On some ICL/CNL SKUs port F is not present, but broken VBTs mark
+	 * the port as present. Only try to initialize port F for the
+	 * SKUs that may actually have it.
+	 */
+	if (port == PORT_F && (IS_ICELAKE(i915) || IS_CANNONLAKE(i915)))
+		return IS_ICL_WITH_PORT_F(i915) || IS_CNL_WITH_PORT_F(i915);
+
+	return true;
+}
+
 static void parse_ddi_port(struct drm_i915_private *i915,
 			   struct intel_bios_encoder_data *devdata)
 {
@@ -1865,6 +1878,13 @@ static void parse_ddi_port(struct drm_i915_private *i915,
 	if (port == PORT_NONE)
 		return;
 
+	if (!is_port_valid(i915, port)) {
+		drm_dbg_kms(&i915->drm,
+			    "VBT reports port %c as supported, but that can't be true: skipping\n",
+			    port_name(port));
+		return;
+	}
+
 	info = &i915->vbt.ddi_port_info[port];
 
 	if (info->devdata) {

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

@@ -11199,15 +11199,7 @@ static void intel_setup_outputs(struct drm_i915_private *dev_priv)
 		intel_ddi_init(dev_priv, PORT_C);
 		intel_ddi_init(dev_priv, PORT_D);
 		intel_ddi_init(dev_priv, PORT_E);
-
-		/*
-		 * On some ICL SKUs port F is not present, but broken VBTs mark
-		 * the port as present. Only try to initialize port F for the
-		 * SKUs that may actually have it.
-		 */
-		if (IS_ICL_WITH_PORT_F(dev_priv))
-			intel_ddi_init(dev_priv, PORT_F);
-
+		intel_ddi_init(dev_priv, PORT_F);
 		icl_dsi_init(dev_priv);
 	} else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) {
 		intel_ddi_init(dev_priv, PORT_A);
@@ -11220,9 +11212,7 @@ static void intel_setup_outputs(struct drm_i915_private *dev_priv)
 		intel_ddi_init(dev_priv, PORT_C);
 		intel_ddi_init(dev_priv, PORT_D);
 		intel_ddi_init(dev_priv, PORT_E);
-
-		if (IS_CNL_WITH_PORT_F(dev_priv))
-			intel_ddi_init(dev_priv, PORT_F);
+		intel_ddi_init(dev_priv, PORT_F);
 	} else if (HAS_DDI(dev_priv)) {
 		u32 found;