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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2012 Red Hat
* Copyright (c) 2015 - 2020 DisplayLink (UK) Ltd.
*
* Based on parts on udlfb.c:
* Copyright (C) 2009 its respective authors
*
* This file is subject to the terms and conditions of the GNU General Public
* License v2. See the file COPYING in the main directory of this archive for
* more details.
*/
#include <linux/version.h>
#if KERNEL_VERSION(5, 5, 0) <= LINUX_VERSION_CODE || defined(EL8)
#else
#include <drm/drmP.h>
#endif
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include "evdi_drm_drv.h"
/* dummy encoder */
static void evdi_enc_destroy(struct drm_encoder *encoder)
{
drm_encoder_cleanup(encoder);
kfree(encoder);
}
static void evdi_encoder_enable(__always_unused struct drm_encoder *encoder)
{
}
static void evdi_encoder_disable(__always_unused struct drm_encoder *encoder)
{
}
static const struct drm_encoder_helper_funcs evdi_enc_helper_funcs = {
.enable = evdi_encoder_enable,
.disable = evdi_encoder_disable
};
static const struct drm_encoder_funcs evdi_enc_funcs = {
.destroy = evdi_enc_destroy,
};
struct drm_encoder *evdi_encoder_init(struct drm_device *dev)
{
struct drm_encoder *encoder;
int ret = 0;
encoder = kzalloc(sizeof(struct drm_encoder), GFP_KERNEL);
if (!encoder)
goto err;
ret = drm_encoder_init(dev, encoder, &evdi_enc_funcs,
DRM_MODE_ENCODER_TMDS, dev_name(dev->dev));
if (ret) {
EVDI_ERROR("Failed to initialize encoder: %d\n", ret);
goto err_encoder;
}
drm_encoder_helper_add(encoder, &evdi_enc_helper_funcs);
encoder->possible_crtcs = 1;
return encoder;
err_encoder:
kfree(encoder);
err:
return NULL;
}
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