diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index ba3d86973995..e326124b3fec 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -150,9 +150,13 @@ static inline struct ast_plane *to_ast_plane(struct drm_plane *plane)
  * BMC
  */
 
+#define MAX_CONNECTORS 2
+
 struct ast_bmc_connector {
 	struct drm_connector base;
-	struct drm_connector *physical_connector;
+
+	struct drm_connector *physical_connectors[MAX_CONNECTORS];
+	int count;
 };
 
 static inline struct ast_bmc_connector *
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index 0637abb70361..428529749ae6 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -85,7 +85,7 @@ static void ast_detect_tx_chip(struct ast_device *ast, bool need_post)
 	if (!need_post) {
 		jreg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xa3, 0xff);
 		if (jreg & 0x80)
-			ast->tx_chip_types = AST_TX_SIL164_BIT;
+			ast->tx_chip_types |= AST_TX_SIL164_BIT;
 	}
 
 	if (IS_AST_GEN4(ast) || IS_AST_GEN5(ast) || IS_AST_GEN6(ast)) {
@@ -97,7 +97,7 @@ static void ast_detect_tx_chip(struct ast_device *ast, bool need_post)
 		jreg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd1, 0xff);
 		switch (jreg) {
 		case 0x04:
-			ast->tx_chip_types = AST_TX_SIL164_BIT;
+			ast->tx_chip_types |= AST_TX_SIL164_BIT;
 			break;
 		case 0x08:
 			ast->dp501_fw_addr = drmm_kzalloc(dev, 32*1024, GFP_KERNEL);
@@ -110,12 +110,12 @@ static void ast_detect_tx_chip(struct ast_device *ast, bool need_post)
 			}
 			fallthrough;
 		case 0x0c:
-			ast->tx_chip_types = AST_TX_DP501_BIT;
+			ast->tx_chip_types |= AST_TX_DP501_BIT;
 		}
 	} else if (IS_AST_GEN7(ast)) {
 		if (ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xD1, TX_TYPE_MASK) ==
 		    ASTDP_DPMCU_TX) {
-			ast->tx_chip_types = AST_TX_ASTDP_BIT;
+			ast->tx_chip_types |= AST_TX_ASTDP_BIT;
 			ast_dp_launch(&ast->base);
 		}
 	}
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index 6695af70768f..31a49d32e506 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -1717,7 +1717,8 @@ static int ast_bmc_connector_helper_detect_ctx(struct drm_connector *connector,
 					       bool force)
 {
 	struct ast_bmc_connector *bmc_connector = to_ast_bmc_connector(connector);
-	struct drm_connector *physical_connector = bmc_connector->physical_connector;
+	struct drm_connector *physical_connector;
+	int i, count = bmc_connector->count;
 
 	/*
 	 * Most user-space compositors cannot handle more than one connected
@@ -1730,10 +1731,13 @@ static int ast_bmc_connector_helper_detect_ctx(struct drm_connector *connector,
 	 *        than one connector per CRTC. The BMC should always be connected.
 	 */
 
-	if (physical_connector && physical_connector->status == connector_status_disconnected)
-		return connector_status_connected;
+	for (i = 0; i < count; i++) {
+		physical_connector = bmc_connector->physical_connectors[i];
+		if (physical_connector && physical_connector->status == connector_status_connected)
+			return connector_status_disconnected;
+	}
 
-	return connector_status_disconnected;
+	return connector_status_connected;
 }
 
 static int ast_bmc_connector_helper_get_modes(struct drm_connector *connector)
@@ -1756,10 +1760,11 @@ static const struct drm_connector_funcs ast_bmc_connector_funcs = {
 
 static int ast_bmc_connector_init(struct drm_device *dev,
 				  struct ast_bmc_connector *bmc_connector,
-				  struct drm_connector *physical_connector)
+				  struct drm_connector **physical_connector,
+				  int count)
 {
 	struct drm_connector *connector = &bmc_connector->base;
-	int ret;
+	int i, ret;
 
 	ret = drm_connector_init(dev, connector, &ast_bmc_connector_funcs,
 				 DRM_MODE_CONNECTOR_VIRTUAL);
@@ -1768,13 +1773,16 @@ static int ast_bmc_connector_init(struct drm_device *dev,
 
 	drm_connector_helper_add(connector, &ast_bmc_connector_helper_funcs);
 
-	bmc_connector->physical_connector = physical_connector;
+	for (i = 0; i < count; i++)
+		bmc_connector->physical_connectors[i] = physical_connector[i];
+	bmc_connector->count = count;
 
 	return 0;
 }
 
 static int ast_bmc_output_init(struct ast_device *ast,
-			       struct drm_connector *physical_connector)
+			       struct drm_connector **physical_connector,
+			       int count)
 {
 	struct drm_device *dev = &ast->base;
 	struct drm_crtc *crtc = &ast->crtc;
@@ -1790,7 +1798,7 @@ static int ast_bmc_output_init(struct ast_device *ast,
 		return ret;
 	encoder->possible_crtcs = drm_crtc_mask(crtc);
 
-	ret = ast_bmc_connector_init(dev, bmc_connector, physical_connector);
+	ret = ast_bmc_connector_init(dev, bmc_connector, physical_connector, count);
 	if (ret)
 		return ret;
 
@@ -1852,8 +1860,8 @@ static const struct drm_mode_config_funcs ast_mode_config_funcs = {
 int ast_mode_config_init(struct ast_device *ast)
 {
 	struct drm_device *dev = &ast->base;
-	struct drm_connector *physical_connector = NULL;
-	int ret;
+	struct drm_connector *physical_connector[MAX_CONNECTORS] = {NULL};
+	int count, ret;
 
 	ret = drmm_mutex_init(dev, &ast->modeset_lock);
 	if (ret)
@@ -1897,27 +1905,27 @@ int ast_mode_config_init(struct ast_device *ast)
 		ret = ast_vga_output_init(ast);
 		if (ret)
 			return ret;
-		physical_connector = &ast->output.vga.connector;
+		physical_connector[count++] = &ast->output.vga.connector;
 	}
 	if (ast->tx_chip_types & AST_TX_SIL164_BIT) {
 		ret = ast_sil164_output_init(ast);
 		if (ret)
 			return ret;
-		physical_connector = &ast->output.sil164.connector;
+		physical_connector[count++] = &ast->output.sil164.connector;
 	}
 	if (ast->tx_chip_types & AST_TX_DP501_BIT) {
 		ret = ast_dp501_output_init(ast);
 		if (ret)
 			return ret;
-		physical_connector = &ast->output.dp501.connector;
+		physical_connector[count++] = &ast->output.dp501.connector;
 	}
 	if (ast->tx_chip_types & AST_TX_ASTDP_BIT) {
 		ret = ast_astdp_output_init(ast);
 		if (ret)
 			return ret;
-		physical_connector = &ast->output.astdp.connector;
+		physical_connector[count++] = &ast->output.astdp.connector;
 	}
-	ret = ast_bmc_output_init(ast, physical_connector);
+	ret = ast_bmc_output_init(ast, physical_connector, count);
 	if (ret)
 		return ret;
 
