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// SPDX-License-Identifier: GPL-2.0+
/*
* rcar_du_encoder.c -- R-Car Display Unit Encoder
*
* Copyright (C) 2013-2014 Renesas Electronics Corporation
*
* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*/
#include <linux/export.h>
#include <drm/drm_crtc.h>
#include <drm/drm_modeset_helper_vtables.h>
#include <drm/drm_panel.h>
#include "rcar_du_drv.h"
#include "rcar_du_encoder.h"
#include "rcar_du_kms.h"
/* -----------------------------------------------------------------------------
* Encoder
*/
static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
};
static const struct drm_encoder_funcs encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
int rcar_du_encoder_init(struct rcar_du_device *rcdu,
enum rcar_du_output output,
struct device_node *enc_node)
{
struct rcar_du_encoder *renc;
struct drm_encoder *encoder;
struct drm_bridge *bridge = NULL;
int ret;
renc = devm_kzalloc(rcdu->dev, sizeof(*renc), GFP_KERNEL);
if (renc == NULL)
return -ENOMEM;
rcdu->encoders[output] = renc;
renc->output = output;
encoder = rcar_encoder_to_drm_encoder(renc);
dev_dbg(rcdu->dev, "initializing encoder %pOF for output %u\n",
enc_node, output);
/* Locate the DRM bridge from the encoder DT node. */
bridge = of_drm_find_bridge(enc_node);
if (!bridge) {
ret = -EPROBE_DEFER;
goto done;
}
ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
DRM_MODE_ENCODER_NONE, NULL);
if (ret < 0)
goto done;
drm_encoder_helper_add(encoder, &encoder_helper_funcs);
/*
* Attach the bridge to the encoder. The bridge will create the
* connector.
*/
ret = drm_bridge_attach(encoder, bridge, NULL);
if (ret) {
drm_encoder_cleanup(encoder);
return ret;
}
done:
if (ret < 0) {
if (encoder->name)
encoder->funcs->destroy(encoder);
devm_kfree(rcdu->dev, renc);
}
return ret;
}
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