diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index b76d492..51a848c 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -390,7 +390,7 @@ int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
 
 	if (blob) {
 		if (blob->length != sizeof(struct drm_mode_modeinfo) ||
-		    drm_mode_convert_umode(&state->mode,
+		    drm_mode_convert_umode(state->crtc->dev, &state->mode,
 		                           (const struct drm_mode_modeinfo *)
 		                            blob->data))
 			return -EINVAL;
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 5b4be38..353e24f 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -614,7 +614,7 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
 			goto out;
 		}
 
-		ret = drm_mode_convert_umode(mode, &crtc_req->mode);
+		ret = drm_mode_convert_umode(dev, mode, &crtc_req->mode);
 		if (ret) {
 			DRM_DEBUG_KMS("Invalid mode\n");
 			goto out;
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index b35324a..c397b52 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -1023,17 +1023,7 @@ bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
 }
 EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo);
 
-/**
- * drm_mode_validate_basic - make sure the mode is somewhat sane
- * @mode: mode to check
- *
- * Check that the mode timings are at least somewhat reasonable.
- * Any hardware specific limits are left up for each driver to check.
- *
- * Returns:
- * The mode status
- */
-enum drm_mode_status
+static enum drm_mode_status
 drm_mode_validate_basic(const struct drm_display_mode *mode)
 {
 	if (mode->type & ~DRM_MODE_TYPE_ALL)
@@ -1062,7 +1052,35 @@ drm_mode_validate_basic(const struct drm_display_mode *mode)
 
 	return MODE_OK;
 }
-EXPORT_SYMBOL(drm_mode_validate_basic);
+
+/**
+ * drm_mode_validate_driver - make sure the mode is somewhat sane
+ * @dev: drm device
+ * @mode: mode to check
+ *
+ * First do basic validation on the mode, and then allow the driver
+ * to check for device/driver specific limitations via the optional
+ * &drm_mode_config_helper_funcs.mode_valid hook.
+ *
+ * Returns:
+ * The mode status
+ */
+enum drm_mode_status
+drm_mode_validate_driver(struct drm_device *dev,
+			const struct drm_display_mode *mode)
+{
+	enum drm_mode_status status;
+
+	status = drm_mode_validate_basic(mode);
+	if (status != MODE_OK)
+		return status;
+
+	if (dev->mode_config.funcs->mode_valid)
+		return dev->mode_config.funcs->mode_valid(dev, mode);
+	else
+		return MODE_OK;
+}
+EXPORT_SYMBOL(drm_mode_validate_driver);
 
 /**
  * drm_mode_validate_size - make sure modes adhere to size constraints
@@ -1564,6 +1582,7 @@ void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
 
 /**
  * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode
+ * @dev: drm device
  * @out: drm_display_mode to return to the user
  * @in: drm_mode_modeinfo to use
  *
@@ -1573,7 +1592,8 @@ void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
  * Returns:
  * Zero on success, negative errno on failure.
  */
-int drm_mode_convert_umode(struct drm_display_mode *out,
+int drm_mode_convert_umode(struct drm_device *dev,
+			   struct drm_display_mode *out,
 			   const struct drm_mode_modeinfo *in)
 {
 	int ret = -EINVAL;
@@ -1600,7 +1620,7 @@ int drm_mode_convert_umode(struct drm_display_mode *out,
 	strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
 	out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
 
-	out->status = drm_mode_validate_basic(out);
+	out->status = drm_mode_validate_driver(dev, out);
 	if (out->status != MODE_OK)
 		goto out;
 
diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index 555fbe5..2d1643b 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -499,7 +499,7 @@ int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
 
 	list_for_each_entry(mode, &connector->modes, head) {
 		if (mode->status == MODE_OK)
-			mode->status = drm_mode_validate_basic(mode);
+			mode->status = drm_mode_validate_driver(dev, mode);
 
 		if (mode->status == MODE_OK)
 			mode->status = drm_mode_validate_size(mode, maxX, maxY);
diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
index 2cb6f02..7569f22 100644
--- a/include/drm/drm_mode_config.h
+++ b/include/drm/drm_mode_config.h
@@ -36,6 +36,7 @@ struct drm_device;
 struct drm_atomic_state;
 struct drm_mode_fb_cmd2;
 struct drm_format_info;
+struct drm_display_mode;
 
 /**
  * struct drm_mode_config_funcs - basic driver provided mode setting functions
@@ -102,6 +103,17 @@ struct drm_mode_config_funcs {
 	void (*output_poll_changed)(struct drm_device *dev);
 
 	/**
+	 * @mode_valid:
+	 *
+	 * Device specific validation of display modes. Can be used to reject
+	 * modes that can never be supported. Only device wide constraints can
+	 * be checked here. crtc/encoder/bridge/connector specific constraints
+	 * should be checked in the .mode_valid() hook for each specific object.
+	 */
+	enum drm_mode_status (*mode_valid)(struct drm_device *dev,
+					   const struct drm_display_mode *mode);
+
+	/**
 	 * @atomic_check:
 	 *
 	 * This is the only hook to validate an atomic modeset update. This
diff --git a/include/drm/drm_modes.h b/include/drm/drm_modes.h
index 71cbb10..0d310be 100644
--- a/include/drm/drm_modes.h
+++ b/include/drm/drm_modes.h
@@ -444,7 +444,8 @@ struct drm_display_mode *drm_mode_create(struct drm_device *dev);
 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode);
 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
 			       const struct drm_display_mode *in);
-int drm_mode_convert_umode(struct drm_display_mode *out,
+int drm_mode_convert_umode(struct drm_device *dev,
+			   struct drm_display_mode *out,
 			   const struct drm_mode_modeinfo *in);
 void drm_mode_probed_add(struct drm_connector *connector, struct drm_display_mode *mode);
 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode);
@@ -497,7 +498,8 @@ bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
 					const struct drm_display_mode *mode2);
 
 /* for use by the crtc helper probe functions */
-enum drm_mode_status drm_mode_validate_basic(const struct drm_display_mode *mode);
+enum drm_mode_status drm_mode_validate_driver(struct drm_device *dev,
+					      const struct drm_display_mode *mode);
 enum drm_mode_status drm_mode_validate_size(const struct drm_display_mode *mode,
 					    int maxX, int maxY);
 enum drm_mode_status