1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017 Free Electrons
* Maxime Ripard <maxime.ripard@free-electrons.com>
*/
#include <linux/clk.h>
#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include <drm/drm_probe_helper.h>
#include "sun4i_crtc.h"
#include "sun4i_tcon.h"
#include "sun4i_lvds.h"
struct sun4i_lvds {
struct drm_connector connector;
struct drm_encoder encoder;
struct sun4i_tcon *tcon;
};
static inline struct sun4i_lvds *
drm_connector_to_sun4i_lvds(struct drm_connector *connector)
{
return container_of(connector, struct sun4i_lvds,
connector);
}
static inline struct sun4i_lvds *
drm_encoder_to_sun4i_lvds(struct drm_encoder *encoder)
{
return container_of(encoder, struct sun4i_lvds,
encoder);
}
static int sun4i_lvds_get_modes(struct drm_connector *connector)
{
struct sun4i_lvds *lvds =
drm_connector_to_sun4i_lvds(connector);
struct sun4i_tcon *tcon = lvds->tcon;
return drm_panel_get_modes(tcon->panel);
}
static struct drm_connector_helper_funcs sun4i_lvds_con_helper_funcs = {
.get_modes = sun4i_lvds_get_modes,
};
static void
sun4i_lvds_connector_destroy(struct drm_connector *connector)
{
struct sun4i_lvds *lvds = drm_connector_to_sun4i_lvds(connector);
struct sun4i_tcon *tcon = lvds->tcon;
drm_panel_detach(tcon->panel);
drm_connector_cleanup(connector);
}
static const struct drm_connector_funcs sun4i_lvds_con_funcs = {
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = sun4i_lvds_connector_destroy,
.reset = drm_atomic_helper_connector_reset,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static void sun4i_lvds_encoder_enable(struct drm_encoder *encoder)
{
struct sun4i_lvds *lvds = drm_encoder_to_sun4i_lvds(encoder);
struct sun4i_tcon *tcon = lvds->tcon;
DRM_DEBUG_DRIVER("Enabling LVDS output\n");
if (tcon->panel) {
drm_panel_prepare(tcon->panel);
drm_panel_enable(tcon->panel);
}
}
static void sun4i_lvds_encoder_disable(struct drm_encoder *encoder)
{
struct sun4i_lvds *lvds = drm_encoder_to_sun4i_lvds(encoder);
struct sun4i_tcon *tcon = lvds->tcon;
DRM_DEBUG_DRIVER("Disabling LVDS output\n");
if (tcon->panel) {
drm_panel_disable(tcon->panel);
drm_panel_unprepare(tcon->panel);
}
}
static const struct drm_encoder_helper_funcs sun4i_lvds_enc_helper_funcs = {
.disable = sun4i_lvds_encoder_disable,
.enable = sun4i_lvds_encoder_enable,
};
static const struct drm_encoder_funcs sun4i_lvds_enc_funcs = {
.destroy = drm_encoder_cleanup,
};
int sun4i_lvds_init(struct drm_device *drm, struct sun4i_tcon *tcon)
{
struct drm_encoder *encoder;
struct drm_bridge *bridge;
struct sun4i_lvds *lvds;
int ret;
lvds = devm_kzalloc(drm->dev, sizeof(*lvds), GFP_KERNEL);
if (!lvds)
return -ENOMEM;
lvds->tcon = tcon;
encoder = &lvds->encoder;
ret = drm_of_find_panel_or_bridge(tcon->dev->of_node, 1, 0,
&tcon->panel, &bridge);
if (ret) {
dev_info(drm->dev, "No panel or bridge found... LVDS output disabled\n");
return 0;
}
drm_encoder_helper_add(&lvds->encoder,
&sun4i_lvds_enc_helper_funcs);
ret = drm_encoder_init(drm,
&lvds->encoder,
&sun4i_lvds_enc_funcs,
DRM_MODE_ENCODER_LVDS,
NULL);
if (ret) {
dev_err(drm->dev, "Couldn't initialise the lvds encoder\n");
goto err_out;
}
/* The LVDS encoder can only work with the TCON channel 0 */
lvds->encoder.possible_crtcs = drm_crtc_mask(&tcon->crtc->crtc);
if (tcon->panel) {
drm_connector_helper_add(&lvds->connector,
&sun4i_lvds_con_helper_funcs);
ret = drm_connector_init(drm, &lvds->connector,
&sun4i_lvds_con_funcs,
DRM_MODE_CONNECTOR_LVDS);
if (ret) {
dev_err(drm->dev, "Couldn't initialise the lvds connector\n");
goto err_cleanup_connector;
}
drm_connector_attach_encoder(&lvds->connector,
&lvds->encoder);
ret = drm_panel_attach(tcon->panel, &lvds->connector);
if (ret) {
dev_err(drm->dev, "Couldn't attach our panel\n");
goto err_cleanup_connector;
}
}
if (bridge) {
ret = drm_bridge_attach(encoder, bridge, NULL);
if (ret) {
dev_err(drm->dev, "Couldn't attach our bridge\n");
goto err_cleanup_connector;
}
}
return 0;
err_cleanup_connector:
drm_encoder_cleanup(&lvds->encoder);
err_out:
return ret;
}
EXPORT_SYMBOL(sun4i_lvds_init);
|
