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_mode_fixup(struct drm_encoder * encoder,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)29 static 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
udl_encoder_prepare(struct drm_encoder * encoder)36 static void udl_encoder_prepare(struct drm_encoder *encoder)
37 {
38 }
39
udl_encoder_commit(struct drm_encoder * encoder)40 static void udl_encoder_commit(struct drm_encoder *encoder)
41 {
42 }
43
udl_encoder_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)44 static 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
50 static void
udl_encoder_dpms(struct drm_encoder * encoder,int mode)51 udl_encoder_dpms(struct drm_encoder *encoder, int mode)
52 {
53 }
54
55 static 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
64 static const struct drm_encoder_funcs udl_enc_funcs = {
65 .destroy = udl_enc_destroy,
66 };
67
udl_encoder_init(struct drm_device * dev)68 struct 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