1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright (C) 2012 Red Hat
 4 * based in parts on udlfb.c:
 5 * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
 6 * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
 7 * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
 8 */
 9
10#include <drm/drm_encoder.h>
11#include <drm/drm_modeset_helper_vtables.h>
12
13#include "udl_drv.h"
14
15/* dummy encoder */
16static void udl_enc_destroy(struct drm_encoder *encoder)
17{
18	drm_encoder_cleanup(encoder);
19	kfree(encoder);
20}
21
22static void udl_encoder_disable(struct drm_encoder *encoder)
23{
24}
25
26static void udl_encoder_prepare(struct drm_encoder *encoder)
27{
28}
29
30static void udl_encoder_commit(struct drm_encoder *encoder)
31{
32}
33
34static void udl_encoder_mode_set(struct drm_encoder *encoder,
35				 struct drm_display_mode *mode,
36				 struct drm_display_mode *adjusted_mode)
37{
38}
39
40static void
41udl_encoder_dpms(struct drm_encoder *encoder, int mode)
42{
43}
44
45static const struct drm_encoder_helper_funcs udl_helper_funcs = {
46	.dpms = udl_encoder_dpms,
47	.prepare = udl_encoder_prepare,
48	.mode_set = udl_encoder_mode_set,
49	.commit = udl_encoder_commit,
50	.disable = udl_encoder_disable,
51};
52
53static const struct drm_encoder_funcs udl_enc_funcs = {
54	.destroy = udl_enc_destroy,
55};
56
57struct drm_encoder *udl_encoder_init(struct drm_device *dev)
58{
59	struct drm_encoder *encoder;
60
61	encoder = kzalloc(sizeof(struct drm_encoder), GFP_KERNEL);
62	if (!encoder)
63		return NULL;
64
65	drm_encoder_init(dev, encoder, &udl_enc_funcs, DRM_MODE_ENCODER_TMDS,
66			 NULL);
67	drm_encoder_helper_add(encoder, &udl_helper_funcs);
68	encoder->possible_crtcs = 1;
69	return encoder;
70}