diff --git a/drivers/gpu/drm/display/drm_hdmi_state_helper.c b/drivers/gpu/drm/display/drm_hdmi_state_helper.c
index 08630561d864..063421835dba 100644
--- a/drivers/gpu/drm/display/drm_hdmi_state_helper.c
+++ b/drivers/gpu/drm/display/drm_hdmi_state_helper.c
@@ -51,15 +51,24 @@ connector_state_get_mode(const struct drm_connector_state *conn_state)
 static enum drm_mode_status
 hdmi_clock_valid(const struct drm_connector *connector,
 		 const struct drm_display_mode *mode,
 		 unsigned long long clock)
 {
+	const struct drm_connector_hdmi_funcs *funcs = connector->hdmi.funcs;
 	const struct drm_display_info *info = &connector->display_info;
 
 	if (info->max_tmds_clock && clock > info->max_tmds_clock * 1000)
 		return MODE_CLOCK_HIGH;
 
+	if (funcs && funcs->tmds_char_rate_valid) {
+		enum drm_mode_status status;
+
+		status = funcs->tmds_char_rate_valid(connector, mode, clock);
+		if (status != MODE_OK)
+			return status;
+	}
+
 	return MODE_OK;
 }
 
 static int
 hdmi_compute_clock(const struct drm_connector *connector,
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index b629c8e990f4..555eac20e5a4 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -455,10 +455,11 @@ EXPORT_SYMBOL(drmm_connector_init);
 /**
  * drmm_connector_hdmi_init - Init a preallocated HDMI connector
  * @dev: DRM device
  * @connector: A pointer to the HDMI connector to init
  * @funcs: callbacks for this connector
+ * @hdmi_funcs: HDMI-related callbacks for this connector
  * @connector_type: user visible type of the connector
  * @ddc: optional pointer to the associated ddc adapter
  * @supported_formats: Bitmask of @hdmi_colorspace listing supported output formats
  * @max_bpc: Maximum bits per char the HDMI connector supports
  *
@@ -474,10 +475,11 @@ EXPORT_SYMBOL(drmm_connector_init);
  * Zero on success, error code on failure.
  */
 int drmm_connector_hdmi_init(struct drm_device *dev,
 			     struct drm_connector *connector,
 			     const struct drm_connector_funcs *funcs,
+			     const struct drm_connector_hdmi_funcs *hdmi_funcs,
 			     int connector_type,
 			     struct i2c_adapter *ddc,
 			     unsigned long supported_formats,
 			     unsigned int max_bpc)
 {
@@ -510,10 +512,12 @@ int drmm_connector_hdmi_init(struct drm_device *dev,
 	connector->max_bpc = max_bpc;
 
 	if (max_bpc > 8)
 		drm_connector_attach_hdr_output_metadata_property(connector);
 
+	connector->hdmi.funcs = hdmi_funcs;
+
 	return 0;
 }
 EXPORT_SYMBOL(drmm_connector_hdmi_init);
 
 /**
diff --git a/drivers/gpu/drm/tests/drm_connector_test.c b/drivers/gpu/drm/tests/drm_connector_test.c
index 050d3bff58eb..31fa9160213f 100644
--- a/drivers/gpu/drm/tests/drm_connector_test.c
+++ b/drivers/gpu/drm/tests/drm_connector_test.c
@@ -22,10 +22,13 @@ struct drm_connector_init_priv {
 	struct drm_device drm;
 	struct drm_connector connector;
 	struct i2c_adapter ddc;
 };
 
+static const struct drm_connector_hdmi_funcs dummy_hdmi_funcs = {
+};
+
 static const struct drm_connector_funcs dummy_funcs = {
 	.atomic_destroy_state	= drm_atomic_helper_connector_destroy_state,
 	.atomic_duplicate_state	= drm_atomic_helper_connector_duplicate_state,
 	.reset			= drm_atomic_helper_connector_reset,
 };
@@ -187,10 +190,11 @@ static void drm_test_connector_hdmi_init_valid(struct kunit *test)
 	struct drm_connector_init_priv *priv = test->priv;
 	int ret;
 
 	ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
 				       &dummy_funcs,
+				       &dummy_hdmi_funcs,
 				       DRM_MODE_CONNECTOR_HDMIA,
 				       &priv->ddc,
 				       BIT(HDMI_COLORSPACE_RGB),
 				       8);
 	KUNIT_EXPECT_EQ(test, ret, 0);
@@ -205,10 +209,11 @@ static void drm_test_connector_hdmi_init_null_ddc(struct kunit *test)
 	struct drm_connector_init_priv *priv = test->priv;
 	int ret;
 
 	ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
 				       &dummy_funcs,
+				       &dummy_hdmi_funcs,
 				       DRM_MODE_CONNECTOR_HDMIA,
 				       NULL,
 				       BIT(HDMI_COLORSPACE_RGB),
 				       8);
 	KUNIT_EXPECT_EQ(test, ret, 0);
@@ -223,10 +228,11 @@ static void drm_test_connector_hdmi_init_bpc_invalid(struct kunit *test)
 	struct drm_connector_init_priv *priv = test->priv;
 	int ret;
 
 	ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
 				       &dummy_funcs,
+				       &dummy_hdmi_funcs,
 				       DRM_MODE_CONNECTOR_HDMIA,
 				       &priv->ddc,
 				       BIT(HDMI_COLORSPACE_RGB),
 				       9);
 	KUNIT_EXPECT_LT(test, ret, 0);
@@ -241,10 +247,11 @@ static void drm_test_connector_hdmi_init_bpc_null(struct kunit *test)
 	struct drm_connector_init_priv *priv = test->priv;
 	int ret;
 
 	ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
 				       &dummy_funcs,
+				       &dummy_hdmi_funcs,
 				       DRM_MODE_CONNECTOR_HDMIA,
 				       &priv->ddc,
 				       BIT(HDMI_COLORSPACE_RGB),
 				       0);
 	KUNIT_EXPECT_LT(test, ret, 0);
@@ -263,10 +270,11 @@ static void drm_test_connector_hdmi_init_bpc_8(struct kunit *test)
 	uint64_t val;
 	int ret;
 
 	ret = drmm_connector_hdmi_init(&priv->drm, connector,
 				       &dummy_funcs,
+				       &dummy_hdmi_funcs,
 				       DRM_MODE_CONNECTOR_HDMIA,
 				       &priv->ddc,
 				       BIT(HDMI_COLORSPACE_RGB),
 				       8);
 	KUNIT_EXPECT_EQ(test, ret, 0);
@@ -297,10 +305,11 @@ static void drm_test_connector_hdmi_init_bpc_10(struct kunit *test)
 	uint64_t val;
 	int ret;
 
 	ret = drmm_connector_hdmi_init(&priv->drm, connector,
 				       &dummy_funcs,
+				       &dummy_hdmi_funcs,
 				       DRM_MODE_CONNECTOR_HDMIA,
 				       &priv->ddc,
 				       BIT(HDMI_COLORSPACE_RGB),
 				       10);
 	KUNIT_EXPECT_EQ(test, ret, 0);
@@ -331,10 +340,11 @@ static void drm_test_connector_hdmi_init_bpc_12(struct kunit *test)
 	uint64_t val;
 	int ret;
 
 	ret = drmm_connector_hdmi_init(&priv->drm, connector,
 				       &dummy_funcs,
+				       &dummy_hdmi_funcs,
 				       DRM_MODE_CONNECTOR_HDMIA,
 				       &priv->ddc,
 				       BIT(HDMI_COLORSPACE_RGB),
 				       12);
 	KUNIT_EXPECT_EQ(test, ret, 0);
@@ -361,10 +371,11 @@ static void drm_test_connector_hdmi_init_formats_empty(struct kunit *test)
 	struct drm_connector_init_priv *priv = test->priv;
 	int ret;
 
 	ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
 				       &dummy_funcs,
+				       &dummy_hdmi_funcs,
 				       DRM_MODE_CONNECTOR_HDMIA,
 				       &priv->ddc,
 				       0,
 				       8);
 	KUNIT_EXPECT_LT(test, ret, 0);
@@ -379,10 +390,11 @@ static void drm_test_connector_hdmi_init_formats_no_rgb(struct kunit *test)
 	struct drm_connector_init_priv *priv = test->priv;
 	int ret;
 
 	ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
 				       &dummy_funcs,
+				       &dummy_hdmi_funcs,
 				       DRM_MODE_CONNECTOR_HDMIA,
 				       &priv->ddc,
 				       BIT(HDMI_COLORSPACE_YUV422),
 				       8);
 	KUNIT_EXPECT_LT(test, ret, 0);
@@ -398,10 +410,11 @@ static void drm_test_connector_hdmi_init_type_valid(struct kunit *test)
 	unsigned int connector_type = *(unsigned int *)test->param_value;
 	int ret;
 
 	ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
 				       &dummy_funcs,
+				       &dummy_hdmi_funcs,
 				       connector_type,
 				       &priv->ddc,
 				       BIT(HDMI_COLORSPACE_RGB),
 				       8);
 	KUNIT_EXPECT_EQ(test, ret, 0);
@@ -431,10 +444,11 @@ static void drm_test_connector_hdmi_init_type_invalid(struct kunit *test)
 	unsigned int connector_type = *(unsigned int *)test->param_value;
 	int ret;
 
 	ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector,
 				       &dummy_funcs,
+				       &dummy_hdmi_funcs,
 				       connector_type,
 				       &priv->ddc,
 				       BIT(HDMI_COLORSPACE_RGB),
 				       8);
 	KUNIT_EXPECT_LT(test, ret, 0);
diff --git a/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c b/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c
index 8ff53ee54e97..7f9a48902db4 100644
--- a/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c
+++ b/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c
@@ -110,10 +110,13 @@ static int set_connector_edid(struct kunit *test, struct drm_connector *connecto
 	KUNIT_ASSERT_GT(test, ret, 0);
 
 	return 0;
 }
 
+static const struct drm_connector_hdmi_funcs dummy_connector_hdmi_funcs = {
+};
+
 static int dummy_connector_get_modes(struct drm_connector *connector)
 {
 	struct drm_atomic_helper_connector_hdmi_priv *priv =
 		connector_to_priv(connector);
 	const struct drm_edid *edid;
@@ -192,10 +195,11 @@ drm_atomic_helper_connector_hdmi_init(struct kunit *test,
 	enc->possible_crtcs = drm_crtc_mask(priv->crtc);
 
 	conn = &priv->connector;
 	ret = drmm_connector_hdmi_init(drm, conn,
 				       &dummy_connector_funcs,
+				       &dummy_connector_hdmi_funcs,
 				       DRM_MODE_CONNECTOR_HDMIA,
 				       NULL,
 				       formats,
 				       max_bpc);
 	KUNIT_ASSERT_EQ(test, ret, 0);
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 54899c030031..3c0b6694074f 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -36,10 +36,11 @@
 
 struct drm_connector_helper_funcs;
 struct drm_modeset_acquire_ctx;
 struct drm_device;
 struct drm_crtc;
+struct drm_display_mode;
 struct drm_encoder;
 struct drm_panel;
 struct drm_property;
 struct drm_property_blob;
 struct drm_printer;
@@ -1055,10 +1056,34 @@ struct drm_connector_state {
 		 */
 		unsigned long long tmds_char_rate;
 	} hdmi;
 };
 
+/**
+ * struct drm_connector_hdmi_funcs - drm_hdmi_connector control functions
+ */
+struct drm_connector_hdmi_funcs {
+	/**
+	 * @tmds_char_rate_valid:
+	 *
+	 * This callback is invoked at atomic_check time to figure out
+	 * whether a particular TMDS character rate is supported by the
+	 * driver.
+	 *
+	 * The @tmds_char_rate_valid callback is optional.
+	 *
+	 * Returns:
+	 *
+	 * Either &drm_mode_status.MODE_OK or one of the failure reasons
+	 * in &enum drm_mode_status.
+	 */
+	enum drm_mode_status
+	(*tmds_char_rate_valid)(const struct drm_connector *connector,
+				const struct drm_display_mode *mode,
+				unsigned long long tmds_rate);
+};
+
 /**
  * struct drm_connector_funcs - control connectors on a given device
  *
  * Each CRTC may have one or more connectors attached to it.  The functions
  * below allow the core DRM code to control connectors, enumerate available modes,
@@ -1923,10 +1948,15 @@ struct drm_connector {
 		/**
 		 * @supported_formats: Bitmask of @hdmi_colorspace
 		 * supported by the controller.
 		 */
 		unsigned long supported_formats;
+
+		/**
+		 * @funcs: HDMI connector Control Functions
+		 */
+		const struct drm_connector_hdmi_funcs *funcs;
 	} hdmi;
 };
 
 #define obj_to_connector(x) container_of(x, struct drm_connector, base)
 
@@ -1945,10 +1975,11 @@ int drmm_connector_init(struct drm_device *dev,
 			int connector_type,
 			struct i2c_adapter *ddc);
 int drmm_connector_hdmi_init(struct drm_device *dev,
 			     struct drm_connector *connector,
 			     const struct drm_connector_funcs *funcs,
+			     const struct drm_connector_hdmi_funcs *hdmi_funcs,
 			     int connector_type,
 			     struct i2c_adapter *ddc,
 			     unsigned long supported_formats,
 			     unsigned int max_bpc);
 void drm_connector_attach_edid_property(struct drm_connector *connector);
