1 files changed, 72 insertions, 0 deletions
diff --git a/drivers/gpu/drm/renesas/rz-du/rzg2l_du_encoder.c b/drivers/gpu/drm/renesas/rz-du/rzg2l_du_encoder.c
new file mode 100644
index 000000000..339cbaaea
--- /dev/null
+++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_du_encoder.c
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * RZ/G2L Display Unit Encoder
+ *
+ * Copyright (C) 2023 Renesas Electronics Corporation
+ *
+ * Based on rcar_du_encoder.c
+ */
+
+#include <linux/export.h>
+#include <linux/of.h>
+
+#include <drm/drm_bridge.h>
+#include <drm/drm_bridge_connector.h>
+#include <drm/drm_panel.h>
+
+#include "rzg2l_du_drv.h"
+#include "rzg2l_du_encoder.h"
+
+/* -----------------------------------------------------------------------------
+ * Encoder
+ */
+
+static const struct drm_encoder_funcs rzg2l_du_encoder_funcs = {
+};
+
+int rzg2l_du_encoder_init(struct rzg2l_du_device  *rcdu,
+			  enum rzg2l_du_output output,
+			  struct device_node *enc_node)
+{
+	struct rzg2l_du_encoder *renc;
+	struct drm_connector *connector;
+	struct drm_bridge *bridge;
+	int ret;
+
+	/* Locate the DRM bridge from the DT node. */
+	bridge = of_drm_find_bridge(enc_node);
+	if (!bridge)
+		return -EPROBE_DEFER;
+
+	dev_dbg(rcdu->dev, "initializing encoder %pOF for output %s\n",
+		enc_node, rzg2l_du_output_name(output));
+
+	renc = drmm_encoder_alloc(&rcdu->ddev, struct rzg2l_du_encoder, base,
+				  &rzg2l_du_encoder_funcs, DRM_MODE_ENCODER_NONE,
+				  NULL);
+	if (IS_ERR(renc))
+		return PTR_ERR(renc);
+
+	renc->output = output;
+
+	/* Attach the bridge to the encoder. */
+	ret = drm_bridge_attach(&renc->base, bridge, NULL,
+				DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+	if (ret) {
+		dev_err(rcdu->dev,
+			"failed to attach bridge %pOF for output %s (%d)\n",
+			bridge->of_node, rzg2l_du_output_name(output), ret);
+		return ret;
+	}
+
+	/* Create the connector for the chain of bridges. */
+	connector = drm_bridge_connector_init(&rcdu->ddev, &renc->base);
+	if (IS_ERR(connector)) {
+		dev_err(rcdu->dev,
+			"failed to created connector for output %s (%ld)\n",
+			rzg2l_du_output_name(output), PTR_ERR(connector));
+		return PTR_ERR(connector);
+	}
+
+	return drm_connector_attach_encoder(connector, &renc->base);
+}