udl_encoder.c revision 92780062496e8454a43b47af1994f83462580ec5 
1/*
2 * Copyright (C) 2012 Red Hat
3 * based in parts on udlfb.c:
4 * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
5 * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
6 * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License v2. See the file COPYING in the main directory of this archive for
10 * more details.
11 */
12
13#include "drmP.h"
14#include "drm_crtc.h"
15#include "drm_crtc_helper.h"
16#include "udl_drv.h"
17
18/* dummy encoder */
19static void udl_enc_destroy(struct drm_encoder *encoder)
20{
21	drm_encoder_cleanup(encoder);
22	kfree(encoder);
23}
24
25static void udl_encoder_disable(struct drm_encoder *encoder)
26{
27}
28
29static bool udl_mode_fixup(struct drm_encoder *encoder,
30			   const struct drm_display_mode *mode,
31			   struct drm_display_mode *adjusted_mode)
32{
33	return true;
34}
35
36static void udl_encoder_prepare(struct drm_encoder *encoder)
37{
38}
39
40static void udl_encoder_commit(struct drm_encoder *encoder)
41{
42}
43
44static void udl_encoder_mode_set(struct drm_encoder *encoder,
45				 struct drm_display_mode *mode,
46				 struct drm_display_mode *adjusted_mode)
47{
48}
49
50static void
51udl_encoder_dpms(struct drm_encoder *encoder, int mode)
52{
53}
54
55static const struct drm_encoder_helper_funcs udl_helper_funcs = {
56	.dpms = udl_encoder_dpms,
57	.mode_fixup = udl_mode_fixup,
58	.prepare = udl_encoder_prepare,
59	.mode_set = udl_encoder_mode_set,
60	.commit = udl_encoder_commit,
61	.disable = udl_encoder_disable,
62};
63
64static const struct drm_encoder_funcs udl_enc_funcs = {
65	.destroy = udl_enc_destroy,
66};
67
68struct drm_encoder *udl_encoder_init(struct drm_device *dev)
69{
70	struct drm_encoder *encoder;
71
72	encoder = kzalloc(sizeof(struct drm_encoder), GFP_KERNEL);
73	if (!encoder)
74		return NULL;
75
76	drm_encoder_init(dev, encoder, &udl_enc_funcs, DRM_MODE_ENCODER_TMDS);
77	drm_encoder_helper_add(encoder, &udl_helper_funcs);
78	encoder->possible_crtcs = 1;
79	return encoder;
80}
81