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// 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);
}
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