5 files changed, 44 insertions, 16 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index f74acc746d11..a00c82ac46f4 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -5216,7 +5216,8 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
 			      IS_ERR(edid) ? NULL : edid);
 
 	intel_panel_add_edid_fixed_modes(intel_connector,
-					 intel_connector->panel.vbt.drrs_type != DRRS_TYPE_NONE);
+					 intel_connector->panel.vbt.drrs_type != DRRS_TYPE_NONE,
+					 intel_vrr_is_capable(intel_connector));
 
 	/* MSO requires information from the EDID */
 	intel_edp_mso_init(intel_dp);
diff --git a/drivers/gpu/drm/i915/display/intel_lvds.c b/drivers/gpu/drm/i915/display/intel_lvds.c
index 595f03343939..e55802b45461 100644
--- a/drivers/gpu/drm/i915/display/intel_lvds.c
+++ b/drivers/gpu/drm/i915/display/intel_lvds.c
@@ -972,7 +972,8 @@ void intel_lvds_init(struct drm_i915_private *dev_priv)
 
 	/* Try EDID first */
 	intel_panel_add_edid_fixed_modes(intel_connector,
-					 intel_connector->panel.vbt.drrs_type != DRRS_TYPE_NONE);
+					 intel_connector->panel.vbt.drrs_type != DRRS_TYPE_NONE,
+					 false);
 
 	/* Failed to get EDID, what about VBT? */
 	if (!intel_panel_preferred_fixed_mode(intel_connector))
diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c
index f55e4eafd74e..237a40623dd7 100644
--- a/drivers/gpu/drm/i915/display/intel_panel.c
+++ b/drivers/gpu/drm/i915/display/intel_panel.c
@@ -71,6 +71,27 @@ intel_panel_fixed_mode(struct intel_connector *connector,
 	return best_mode;
 }
 
+static bool is_alt_drrs_mode(const struct drm_display_mode *mode,
+			     const struct drm_display_mode *preferred_mode)
+{
+	return drm_mode_match(mode, preferred_mode,
+			      DRM_MODE_MATCH_TIMINGS |
+			      DRM_MODE_MATCH_FLAGS |
+			      DRM_MODE_MATCH_3D_FLAGS) &&
+		mode->clock != preferred_mode->clock;
+}
+
+static bool is_alt_vrr_mode(const struct drm_display_mode *mode,
+			    const struct drm_display_mode *preferred_mode)
+{
+	return drm_mode_match(mode, preferred_mode,
+			      DRM_MODE_MATCH_FLAGS |
+			      DRM_MODE_MATCH_3D_FLAGS) &&
+		mode->hdisplay == preferred_mode->hdisplay &&
+		mode->vdisplay == preferred_mode->vdisplay &&
+		mode->clock != preferred_mode->clock;
+}
+
 const struct drm_display_mode *
 intel_panel_downclock_mode(struct intel_connector *connector,
 			   const struct drm_display_mode *adjusted_mode)
@@ -83,7 +104,8 @@ intel_panel_downclock_mode(struct intel_connector *connector,
 	list_for_each_entry(fixed_mode, &connector->panel.fixed_modes, head) {
 		int vrefresh = drm_mode_vrefresh(fixed_mode);
 
-		if (vrefresh >= min_vrefresh && vrefresh < max_vrefresh) {
+		if (is_alt_drrs_mode(fixed_mode, adjusted_mode) &&
+		    vrefresh >= min_vrefresh && vrefresh < max_vrefresh) {
 			max_vrefresh = vrefresh;
 			best_mode = fixed_mode;
 		}
@@ -151,16 +173,18 @@ int intel_panel_compute_config(struct intel_connector *connector,
 }
 
 static bool is_alt_fixed_mode(const struct drm_display_mode *mode,
-			      const struct drm_display_mode *preferred_mode)
+			      const struct drm_display_mode *preferred_mode,
+			      bool has_vrr)
 {
-	return drm_mode_match(mode, preferred_mode,
-			      DRM_MODE_MATCH_TIMINGS |
-			      DRM_MODE_MATCH_FLAGS |
-			      DRM_MODE_MATCH_3D_FLAGS) &&
-		mode->clock != preferred_mode->clock;
+	/* is_alt_drrs_mode() is a subset of is_alt_vrr_mode() */
+	if (has_vrr)
+		return is_alt_vrr_mode(mode, preferred_mode);
+	else
+		return is_alt_drrs_mode(mode, preferred_mode);
 }
 
-static void intel_panel_add_edid_alt_fixed_modes(struct intel_connector *connector)
+static void intel_panel_add_edid_alt_fixed_modes(struct intel_connector *connector,
+						 bool has_vrr)
 {
 	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 	const struct drm_display_mode *preferred_mode =
@@ -168,7 +192,7 @@ static void intel_panel_add_edid_alt_fixed_modes(struct intel_connector *connect
 	struct drm_display_mode *mode, *next;
 
 	list_for_each_entry_safe(mode, next, &connector->base.probed_modes, head) {
-		if (!is_alt_fixed_mode(mode, preferred_mode))
+		if (!is_alt_fixed_mode(mode, preferred_mode, has_vrr))
 			continue;
 
 		drm_dbg_kms(&dev_priv->drm,
@@ -226,11 +250,12 @@ static void intel_panel_destroy_probed_modes(struct intel_connector *connector)
 	}
 }
 
-void intel_panel_add_edid_fixed_modes(struct intel_connector *connector, bool has_drrs)
+void intel_panel_add_edid_fixed_modes(struct intel_connector *connector,
+				      bool has_drrs, bool has_vrr)
 {
 	intel_panel_add_edid_preferred_mode(connector);
-	if (intel_panel_preferred_fixed_mode(connector) && has_drrs)
-		intel_panel_add_edid_alt_fixed_modes(connector);
+	if (intel_panel_preferred_fixed_mode(connector) && (has_drrs || has_vrr))
+		intel_panel_add_edid_alt_fixed_modes(connector, has_vrr);
 	intel_panel_destroy_probed_modes(connector);
 }
 
diff --git a/drivers/gpu/drm/i915/display/intel_panel.h b/drivers/gpu/drm/i915/display/intel_panel.h
index 2e32bb728beb..b087c0c3cc6d 100644
--- a/drivers/gpu/drm/i915/display/intel_panel.h
+++ b/drivers/gpu/drm/i915/display/intel_panel.h
@@ -40,7 +40,8 @@ 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_modes(struct intel_connector *connector, bool has_drrs);
+void intel_panel_add_edid_fixed_modes(struct intel_connector *connector,
+				      bool has_drrs, bool has_vrr);
 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,
diff --git a/drivers/gpu/drm/i915/display/intel_sdvo.c b/drivers/gpu/drm/i915/display/intel_sdvo.c
index ba76783994ae..81f700517e89 100644
--- a/drivers/gpu/drm/i915/display/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/display/intel_sdvo.c
@@ -2910,7 +2910,7 @@ 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_modes(intel_connector, false);
+		intel_panel_add_edid_fixed_modes(intel_connector, false, false);
 	}
 
 	intel_panel_init(intel_connector);