diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 6461d00e8e49..075bdc08d5c3 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -889,6 +889,14 @@ static const struct drm_prop_enum_list drm_dp_subconnector_enum_list[] = {
 	{ DRM_MODE_SUBCONNECTOR_Native,	     "Native"    }, /* DP */
 };
 
+static const struct drm_prop_enum_list drm_active_color_format_enum_list[] = {
+	{ 0, "not applicable" },
+	{ DRM_COLOR_FORMAT_RGB444, "rgb" },
+	{ DRM_COLOR_FORMAT_YCRCB444, "ycbcr444" },
+	{ DRM_COLOR_FORMAT_YCRCB422, "ycbcr422" },
+	{ DRM_COLOR_FORMAT_YCRCB420, "ycbcr420" },
+};
+
 DRM_ENUM_NAME_FN(drm_get_dp_subconnector_name,
 		 drm_dp_subconnector_enum_list)
 
@@ -1206,6 +1214,15 @@ static const struct drm_prop_enum_list dp_colorspaces[] = {
  *	Drivers shall use drm_connector_attach_active_bpc_property() to install
  *	this property. A value of 0 means "not applicable".
  *
+ * active color format:
+ *	This read-only property tells userspace the color format actually used
+ *	by the hardware display engine "on the cable" on a connector. The chosen
+ *	value depends on hardware capabilities, both display engine and
+ *	connected monitor. Drivers shall use
+ *	drm_connector_attach_active_color_format_property() to install this
+ *	property. Possible values are "not applicable", "rgb", "ycbcr444",
+ *	"ycbcr422", and "ycbcr420".
+ *
  * Connectors also have one standardized atomic property:
  *
  * CRTC_ID:
@@ -2205,6 +2222,52 @@ void drm_connector_set_active_bpc_property(struct drm_connector *connector, int
 }
 EXPORT_SYMBOL(drm_connector_set_active_bpc_property);
 
+/**
+ * drm_connector_attach_active_color_format_property - attach "active color format" property
+ * @connector: connector to attach active color format property on.
+ *
+ * This is used to check the applied color format on a connector.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_connector_attach_active_color_format_property(struct drm_connector *connector)
+{
+	struct drm_device *dev = connector->dev;
+	struct drm_property *prop;
+
+	if (!connector->active_color_format_property) {
+		prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, "active color format",
+						drm_active_color_format_enum_list,
+						ARRAY_SIZE(drm_active_color_format_enum_list));
+		if (!prop)
+			return -ENOMEM;
+
+		connector->active_color_format_property = prop;
+	}
+
+	drm_object_attach_property(&connector->base, prop, 0);
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_connector_attach_active_color_format_property);
+
+/**
+ * drm_connector_set_active_color_format_property - sets the active color format property for a
+ * connector
+ * @connector: drm connector
+ * @active_color_format: color format for the connector currently active "on the cable"
+ *
+ * Should be used by atomic drivers to update the active color format over a connector.
+ */
+void drm_connector_set_active_color_format_property(struct drm_connector *connector,
+						    u32 active_color_format)
+{
+	drm_object_property_set_value(&connector->base, connector->active_color_format_property,
+				      active_color_format);
+}
+EXPORT_SYMBOL(drm_connector_set_active_color_format_property);
+
 /**
  * drm_connector_attach_hdr_output_metadata_property - attach "HDR_OUTPUT_METADA" property
  * @connector: connector to attach the property on.
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index eee86de62a5f..8a5197f14e87 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1386,6 +1386,12 @@ struct drm_connector {
 	 */
 	struct drm_property *active_bpc_property;
 
+	/**
+	 * @active_color_format_property: Default connector property for the
+	 * active color format to be driven out of the connector.
+	 */
+	struct drm_property *active_color_format_property;
+
 #define DRM_CONNECTOR_POLL_HPD (1 << 0)
 #define DRM_CONNECTOR_POLL_CONNECT (1 << 1)
 #define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2)
@@ -1710,6 +1716,9 @@ int drm_connector_attach_max_bpc_property(struct drm_connector *connector,
 					  int min, int max);
 int drm_connector_attach_active_bpc_property(struct drm_connector *connector, int min, int max);
 void drm_connector_set_active_bpc_property(struct drm_connector *connector, int active_bpc);
+int drm_connector_attach_active_color_format_property(struct drm_connector *connector);
+void drm_connector_set_active_color_format_property(struct drm_connector *connector,
+						    u32 active_color_format);
 
 /**
  * struct drm_tile_group - Tile group metadata
