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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/*
* Copyright (C) 2013,2014 ARM Limited
* Author: Liviu Dudau <Liviu.Dudau@arm.com>
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*
*/
#include <linux/i2c.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <video/display_timing.h>
#include <video/of_display_timing.h>
#include <video/videomode.h>
#include "hdlcd_drv.h"
struct hdlcd_connector {
struct drm_connector connector;
struct display_timings *timings;
};
#define conn_to_hdlcd(x) container_of(x, struct hdlcd_connector, connector)
static void hdlcd_connector_destroy(struct drm_connector *connector)
{
struct hdlcd_connector *hdlcd = conn_to_hdlcd(connector);
drm_connector_cleanup(connector);
kfree(hdlcd);
}
static enum drm_connector_status hdlcd_connector_detect(
struct drm_connector *connector, bool force)
{
return connector_status_connected;
}
static const struct drm_connector_funcs hdlcd_connector_funcs = {
.destroy = hdlcd_connector_destroy,
.dpms = drm_helper_connector_dpms,
.detect = hdlcd_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
};
static int hdlcd_connector_get_modes(struct drm_connector *connector)
{
struct hdlcd_connector *hdlcd = conn_to_hdlcd(connector);
struct display_timings *timings = hdlcd->timings;
int i;
for (i = 0; i < timings->num_timings; i++) {
struct drm_display_mode *mode = drm_mode_create(connector->dev);
struct videomode vm;
if (videomode_from_timings(timings, &vm, i))
break;
drm_display_mode_from_videomode(&vm, mode);
mode->type = DRM_MODE_TYPE_DRIVER;
if (timings->native_mode == i)
mode->type = DRM_MODE_TYPE_PREFERRED;
drm_mode_set_name(mode);
drm_mode_probed_add(connector, mode);
}
return i;
}
static int hdlcd_connector_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
return MODE_OK;
}
static const struct drm_connector_helper_funcs hdlcd_virt_con_helper_funcs = {
.get_modes = hdlcd_connector_get_modes,
.mode_valid = hdlcd_connector_mode_valid,
.best_encoder = hdlcd_connector_best_encoder,
};
static void hdlcd_encoder_destroy(struct drm_encoder *encoder)
{
drm_encoder_cleanup(encoder);
kfree(encoder);
}
static const struct drm_encoder_funcs hdlcd_encoder_funcs = {
.destroy = hdlcd_encoder_destroy,
};
static void hdlcd_encoder_dpms(struct drm_encoder *encoder, int mode)
{
}
static bool hdlcd_encoder_mode_fixup(struct drm_encoder *encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
/* nothing needed */
return true;
}
static void hdlcd_encoder_prepare(struct drm_encoder *encoder)
{
hdlcd_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
}
static void hdlcd_encoder_commit(struct drm_encoder *encoder)
{
hdlcd_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
}
static void hdlcd_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
/* nothing needed */
}
static const struct drm_encoder_helper_funcs hdlcd_encoder_helper_funcs = {
.dpms = hdlcd_encoder_dpms,
.mode_fixup = hdlcd_encoder_mode_fixup,
.prepare = hdlcd_encoder_prepare,
.commit = hdlcd_encoder_commit,
.mode_set = hdlcd_encoder_mode_set,
};
int hdlcd_create_virtual_connector(struct drm_device *dev)
{
struct drm_encoder *encoder;
struct hdlcd_connector *hdlcdc;
struct drm_connector *connector;
int ret;
encoder = kzalloc(sizeof(*encoder), GFP_KERNEL);
if (!encoder)
return -ENOMEM;
encoder->possible_crtcs = 1;
encoder->possible_clones = 0;
ret = drm_encoder_init(dev, encoder, &hdlcd_encoder_funcs,
DRM_MODE_ENCODER_VIRTUAL);
if (ret)
goto encoder_init_err;
drm_encoder_helper_add(encoder, &hdlcd_encoder_helper_funcs);
hdlcdc = kzalloc(sizeof(*hdlcdc), GFP_KERNEL);
if (!hdlcdc) {
ret = -ENOMEM;
goto connector_alloc_err;
}
hdlcdc->timings = of_get_display_timings(dev->platformdev->dev.of_node);
if (!hdlcdc->timings) {
dev_err(dev->dev, "failed to get display panel timings\n");
ret = -ENXIO;
goto connector_init_err;
}
connector = &hdlcdc->connector;
/* bogus values, pretend we're a 24" screen */
connector->display_info.width_mm = 519;
connector->display_info.height_mm = 324;
connector->interlace_allowed = false;
connector->doublescan_allowed = false;
connector->polled = 0;
ret = drm_connector_init(dev, connector, &hdlcd_connector_funcs,
DRM_MODE_CONNECTOR_VIRTUAL);
if (ret)
goto connector_init_err;
drm_connector_helper_add(connector, &hdlcd_virt_con_helper_funcs);
connector->encoder = encoder;
ret = drm_mode_connector_attach_encoder(connector, encoder);
if (ret)
goto attach_err;
return ret;
attach_err:
drm_connector_cleanup(connector);
connector_init_err:
kfree(hdlcdc);
connector_alloc_err:
drm_encoder_cleanup(encoder);
encoder_init_err:
kfree(encoder);
return ret;
};
|
