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 <drm/drmP.h>
14 #include <drm/drm_crtc.h>
15 #include <drm/drm_crtc_helper.h>
16 #include "udl_drv.h"
17
18 /* dummy encoder */
udl_enc_destroy(struct drm_encoder * encoder)19 static void udl_enc_destroy(struct drm_encoder *encoder)
20 {
21 drm_encoder_cleanup(encoder);
22 kfree(encoder);
23 }
24
udl_encoder_disable(struct drm_encoder * encoder)25 static void udl_encoder_disable(struct drm_encoder *encoder)
26 {
27 }
28
udl_encoder_prepare(struct drm_encoder * encoder)29 static void udl_encoder_prepare(struct drm_encoder *encoder)
30 {
31 }
32
udl_encoder_commit(struct drm_encoder * encoder)33 static void udl_encoder_commit(struct drm_encoder *encoder)
34 {
35 }
36
udl_encoder_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)37 static void udl_encoder_mode_set(struct drm_encoder *encoder,
38 struct drm_display_mode *mode,
39 struct drm_display_mode *adjusted_mode)
40 {
41 }
42
43 static void
udl_encoder_dpms(struct drm_encoder * encoder,int mode)44 udl_encoder_dpms(struct drm_encoder *encoder, int mode)
45 {
46 }
47
48 static const struct drm_encoder_helper_funcs udl_helper_funcs = {
49 .dpms = udl_encoder_dpms,
50 .prepare = udl_encoder_prepare,
51 .mode_set = udl_encoder_mode_set,
52 .commit = udl_encoder_commit,
53 .disable = udl_encoder_disable,
54 };
55
56 static const struct drm_encoder_funcs udl_enc_funcs = {
57 .destroy = udl_enc_destroy,
58 };
59
udl_encoder_init(struct drm_device * dev)60 struct drm_encoder *udl_encoder_init(struct drm_device *dev)
61 {
62 struct drm_encoder *encoder;
63
64 encoder = kzalloc(sizeof(struct drm_encoder), GFP_KERNEL);
65 if (!encoder)
66 return NULL;
67
68 drm_encoder_init(dev, encoder, &udl_enc_funcs, DRM_MODE_ENCODER_TMDS,
69 NULL);
70 drm_encoder_helper_add(encoder, &udl_helper_funcs);
71 encoder->possible_crtcs = 1;
72 return encoder;
73 }
74
