1 files changed, 90 insertions, 0 deletions
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
new file mode 100644
index 000000000..8db51fb13
--- /dev/null
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2014 Traphandler
+ * Copyright (C) 2014 Free Electrons
+ * Copyright (C) 2014 Atmel
+ *
+ * Author: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
+ * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/of_graph.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_of.h>
+#include <drm/drm_bridge.h>
+
+#include "atmel_hlcdc_dc.h"
+
+static const struct drm_encoder_funcs atmel_hlcdc_panel_encoder_funcs = {
+	.destroy = drm_encoder_cleanup,
+};
+
+static int atmel_hlcdc_attach_endpoint(struct drm_device *dev, int endpoint)
+{
+	struct drm_encoder *encoder;
+	struct drm_panel *panel;
+	struct drm_bridge *bridge;
+	int ret;
+
+	ret = drm_of_find_panel_or_bridge(dev->dev->of_node, 0, endpoint,
+					  &panel, &bridge);
+	if (ret)
+		return ret;
+
+	encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL);
+	if (!encoder)
+		return -EINVAL;
+
+	ret = drm_encoder_init(dev, encoder,
+			       &atmel_hlcdc_panel_encoder_funcs,
+			       DRM_MODE_ENCODER_NONE, NULL);
+	if (ret)
+		return ret;
+
+	encoder->possible_crtcs = 0x1;
+
+	if (panel) {
+		bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_Unknown);
+		if (IS_ERR(bridge))
+			return PTR_ERR(bridge);
+	}
+
+	if (bridge) {
+		ret = drm_bridge_attach(encoder, bridge, NULL);
+		if (!ret)
+			return 0;
+
+		if (panel)
+			drm_panel_bridge_remove(bridge);
+	}
+
+	drm_encoder_cleanup(encoder);
+
+	return ret;
+}
+
+int atmel_hlcdc_create_outputs(struct drm_device *dev)
+{
+	int endpoint, ret = 0;
+
+	for (endpoint = 0; !ret; endpoint++)
+		ret = atmel_hlcdc_attach_endpoint(dev, endpoint);
+
+	/* At least one device was successfully attached.*/
+	if (ret == -ENODEV && endpoint)
+		return 0;
+
+	return ret;
+}