drm/i915: Combine the EDID fixed_mode+downclock_mode lookup into one

The intel_panel_add_edid_fixed_mode() vs.
intel_panel_add_edid_downclock_mode() split is not really
helpful. Let's just roll those into a single function so
that the connector init code doesn't have to care too much
about this. All we need to know is whether DRRS should be
allowed or not.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220331112822.11462-6-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

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

@@ -5072,10 +5072,8 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
 	}
 	intel_connector->edid = edid;
 
-	intel_panel_add_edid_fixed_mode(intel_connector);
-	if (intel_panel_preferred_fixed_mode(intel_connector) &&
-	    intel_edp_has_drrs(intel_dp))
-		intel_panel_add_edid_downclock_mode(intel_connector);
+	intel_panel_add_edid_fixed_modes(intel_connector,
+					 intel_edp_has_drrs(intel_dp));
 
 	/* MSO requires information from the EDID */
 	intel_edp_mso_init(intel_dp);

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

@@ -968,7 +968,7 @@ void intel_lvds_init(struct drm_i915_private *dev_priv)
 	intel_connector->edid = edid;
 
 	/* Try EDID first */
-	intel_panel_add_edid_fixed_mode(intel_connector);
+	intel_panel_add_edid_fixed_modes(intel_connector, false);
 
 	/* Failed to get EDID, what about VBT? */
 	if (!intel_panel_preferred_fixed_mode(intel_connector))

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

@@ -159,7 +159,7 @@ static bool is_downclock_mode(const struct drm_display_mode *downclock_mode,
 		downclock_mode->clock < fixed_mode->clock;
 }
 
-void intel_panel_add_edid_downclock_mode(struct intel_connector *connector)
+static void intel_panel_add_edid_downclock_mode(struct intel_connector *connector)
 {
 	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 	const struct drm_display_mode *fixed_mode =
@@ -202,7 +202,7 @@ void intel_panel_add_edid_downclock_mode(struct intel_connector *connector)
 	list_add_tail(&downclock_mode->head, &connector->panel.fixed_modes);
 }
 
-void intel_panel_add_edid_fixed_mode(struct intel_connector *connector)
+static void intel_panel_add_edid_fixed_mode(struct intel_connector *connector)
 {
 	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 	const struct drm_display_mode *scan;
@@ -244,6 +244,13 @@ void intel_panel_add_edid_fixed_mode(struct intel_connector *connector)
 	list_add_tail(&fixed_mode->head, &connector->panel.fixed_modes);
 }
 
+void intel_panel_add_edid_fixed_modes(struct intel_connector *connector, bool has_drrs)
+{
+	intel_panel_add_edid_fixed_mode(connector);
+	if (intel_panel_preferred_fixed_mode(connector) && has_drrs)
+		intel_panel_add_edid_downclock_mode(connector);
+}
+
 static void intel_panel_add_fixed_mode(struct intel_connector *connector,
 				       struct drm_display_mode *fixed_mode,
 				       const char *type)

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

@@ -40,8 +40,7 @@ int intel_panel_fitting(struct intel_crtc_state *crtc_state,
 			const struct drm_connector_state *conn_state);
 int intel_panel_compute_config(struct intel_connector *connector,
 			       struct drm_display_mode *adjusted_mode);
-void intel_panel_add_edid_fixed_mode(struct intel_connector *connector);
-void intel_panel_add_edid_downclock_mode(struct intel_connector *connector);
+void intel_panel_add_edid_fixed_modes(struct intel_connector *connector, bool has_drrs);
 void intel_panel_add_vbt_lfp_fixed_mode(struct intel_connector *connector);
 void intel_panel_add_vbt_sdvo_fixed_mode(struct intel_connector *connector);
 void intel_panel_add_encoder_fixed_mode(struct intel_connector *connector,

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

@@ -2907,7 +2907,7 @@ intel_sdvo_lvds_init(struct intel_sdvo *intel_sdvo, int device)
 
 	if (!intel_panel_preferred_fixed_mode(intel_connector)) {
 		intel_ddc_get_modes(connector, &intel_sdvo->ddc);
-		intel_panel_add_edid_fixed_mode(intel_connector);
+		intel_panel_add_edid_fixed_modes(intel_connector, false);
 	}
 
 	intel_panel_init(intel_connector);