diff --git a/board/plankton/board.c b/board/plankton/board.c
index d8b8dcd56c..d3a66f1fe2 100644
--- a/board/plankton/board.c
+++ b/board/plankton/board.c
@@ -126,6 +126,7 @@ enum usbc_action {
 	USBC_ACT_MUX_FLIP,
 	USBC_ACT_CABLE_POLARITY0,
 	USBC_ACT_CABLE_POLARITY1,
+	USBC_ACT_CCD_EN,
 
 	/* Number of USBC actions */
 	USBC_ACT_COUNT
@@ -310,6 +311,9 @@ static void set_usbc_action(enum usbc_action act)
 	case USBC_ACT_CABLE_POLARITY1:
 		gpio_set_level(GPIO_USBC_POLARITY, 1);
 		break;
+	case USBC_ACT_CCD_EN:
+		pd_send_vdm(0, USB_VID_GOOGLE, VDO_CMD_CCD_EN, NULL, 0);
+		break;
 	default:
 		break;
 	}
@@ -358,6 +362,9 @@ static void button_deferred(void)
 	case GPIO_DBG_MUX_FLIP_L:
 		set_usbc_action(USBC_ACT_MUX_FLIP);
 		break;
+	case GPIO_DBG_CASE_CLOSE_EN_L:
+		set_usbc_action(USBC_ACT_CCD_EN);
+		break;
 	default:
 		break;
 	}
@@ -499,6 +506,8 @@ static int cmd_usbc_action(int argc, char *argv[])
 		act = USBC_ACT_12V_TO_DUT;
 	else if (!strcasecmp(argv[1], "20v"))
 		act = USBC_ACT_20V_TO_DUT;
+	else if (!strcasecmp(argv[1], "ccd"))
+		act = USBC_ACT_CCD_EN;
 	else if (!strcasecmp(argv[1], "dev"))
 		act = USBC_ACT_DEVICE;
 	else if (!strcasecmp(argv[1], "usb"))
@@ -519,7 +528,7 @@ static int cmd_usbc_action(int argc, char *argv[])
 	return EC_SUCCESS;
 }
 DECLARE_CONSOLE_COMMAND(usbc_action, cmd_usbc_action,
-			"<5v|12v|20v|dev|usb|dp|flip|pol0|pol1>",
+			"<5v|12v|20v|ccd|dev|usb|dp|flip|pol0|pol1>",
 			"Set Plankton type-C port state",
 			NULL);
 
@@ -647,6 +656,7 @@ static void board_init(void)
 	gpio_enable_interrupt(GPIO_DBG_CHG_TO_DEV_L);
 	gpio_enable_interrupt(GPIO_DBG_USB_TOGGLE_L);
 	gpio_enable_interrupt(GPIO_DBG_MUX_FLIP_L);
+	gpio_enable_interrupt(GPIO_DBG_CASE_CLOSE_EN_L);
 
 	/* TODO(crosbug.com/33761): poll DBG_20V_TO_DUT_L */
 	enable_dbg20v_poll();
diff --git a/board/ryu/usb_pd_policy.c b/board/ryu/usb_pd_policy.c
index 6a22a76a16..14e5828f17 100644
--- a/board/ryu/usb_pd_policy.c
+++ b/board/ryu/usb_pd_policy.c
@@ -4,6 +4,7 @@
  */
 
 #include "config.h"
+#include "case_closed_debug.h"
 #include "charge_manager.h"
 #include "charger.h"
 #include "common.h"
@@ -252,6 +253,11 @@ int pd_custom_vdm(int port, int cnt, uint32_t *payload,
 		pd_log_recv_vdm(port, cnt, payload);
 		break;
 #endif /* CONFIG_USB_PD_LOGGING */
+#ifdef CONFIG_CASE_CLOSED_DEBUG
+	case VDO_CMD_CCD_EN:
+		ccd_set_mode(CCD_MODE_ENABLED);
+		break;
+#endif
 	}
 
 	return 0;
diff --git a/include/usb_pd.h b/include/usb_pd.h
index 9fd95bac8d..b25eca3ebc 100644
--- a/include/usb_pd.h
+++ b/include/usb_pd.h
@@ -325,6 +325,7 @@ struct pd_policy {
 #define VDO_CMD_CURRENT      VDO_CMD_VENDOR(11)
 #define VDO_CMD_FLIP         VDO_CMD_VENDOR(12)
 #define VDO_CMD_GET_LOG      VDO_CMD_VENDOR(13)
+#define VDO_CMD_CCD_EN       VDO_CMD_VENDOR(14)
 
 #define PD_VDO_VID(vdo)  ((vdo) >> 16)
 #define PD_VDO_SVDM(vdo) (((vdo) >> 15) & 1)