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
|
/*
* Copyright (C) 2016 Noralf Trønnes
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_modes.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_print.h>
#include <drm/drm_simple_kms_helper.h>
struct tinydrm_connector {
struct drm_connector base;
struct drm_display_mode mode;
};
static inline struct tinydrm_connector *
to_tinydrm_connector(struct drm_connector *connector)
{
return container_of(connector, struct tinydrm_connector, base);
}
static int tinydrm_connector_get_modes(struct drm_connector *connector)
{
struct tinydrm_connector *tconn = to_tinydrm_connector(connector);
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, &tconn->mode);
if (!mode) {
DRM_ERROR("Failed to duplicate mode\n");
return 0;
}
if (mode->name[0] == '\0')
drm_mode_set_name(mode);
mode->type |= DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(connector, mode);
if (mode->width_mm) {
connector->display_info.width_mm = mode->width_mm;
connector->display_info.height_mm = mode->height_mm;
}
return 1;
}
static const struct drm_connector_helper_funcs tinydrm_connector_hfuncs = {
.get_modes = tinydrm_connector_get_modes,
};
static enum drm_connector_status
tinydrm_connector_detect(struct drm_connector *connector, bool force)
{
if (drm_dev_is_unplugged(connector->dev))
return connector_status_disconnected;
return connector->status;
}
static void tinydrm_connector_destroy(struct drm_connector *connector)
{
struct tinydrm_connector *tconn = to_tinydrm_connector(connector);
drm_connector_cleanup(connector);
kfree(tconn);
}
static const struct drm_connector_funcs tinydrm_connector_funcs = {
.reset = drm_atomic_helper_connector_reset,
.detect = tinydrm_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = tinydrm_connector_destroy,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
struct drm_connector *
tinydrm_connector_create(struct drm_device *drm,
const struct drm_display_mode *mode,
int connector_type)
{
struct tinydrm_connector *tconn;
struct drm_connector *connector;
int ret;
tconn = kzalloc(sizeof(*tconn), GFP_KERNEL);
if (!tconn)
return ERR_PTR(-ENOMEM);
drm_mode_copy(&tconn->mode, mode);
connector = &tconn->base;
drm_connector_helper_add(connector, &tinydrm_connector_hfuncs);
ret = drm_connector_init(drm, connector, &tinydrm_connector_funcs,
connector_type);
if (ret) {
kfree(tconn);
return ERR_PTR(ret);
}
connector->status = connector_status_connected;
return connector;
}
static int tinydrm_rotate_mode(struct drm_display_mode *mode,
unsigned int rotation)
{
if (rotation == 0 || rotation == 180) {
return 0;
} else if (rotation == 90 || rotation == 270) {
swap(mode->hdisplay, mode->vdisplay);
swap(mode->hsync_start, mode->vsync_start);
swap(mode->hsync_end, mode->vsync_end);
swap(mode->htotal, mode->vtotal);
swap(mode->width_mm, mode->height_mm);
return 0;
} else {
return -EINVAL;
}
}
/**
* tinydrm_display_pipe_init - Initialize display pipe
* @drm: DRM device
* @pipe: Display pipe
* @funcs: Display pipe functions
* @connector_type: Connector type
* @formats: Array of supported formats (DRM_FORMAT\_\*)
* @format_count: Number of elements in @formats
* @mode: Supported mode
* @rotation: Initial @mode rotation in degrees Counter Clock Wise
*
* This function sets up a &drm_simple_display_pipe with a &drm_connector that
* has one fixed &drm_display_mode which is rotated according to @rotation.
*
* Returns:
* Zero on success, negative error code on failure.
*/
int tinydrm_display_pipe_init(struct drm_device *drm,
struct drm_simple_display_pipe *pipe,
const struct drm_simple_display_pipe_funcs *funcs,
int connector_type,
const uint32_t *formats,
unsigned int format_count,
const struct drm_display_mode *mode,
unsigned int rotation)
{
struct drm_display_mode mode_copy;
struct drm_connector *connector;
int ret;
static const uint64_t modifiers[] = {
DRM_FORMAT_MOD_LINEAR,
DRM_FORMAT_MOD_INVALID
};
drm_mode_copy(&mode_copy, mode);
ret = tinydrm_rotate_mode(&mode_copy, rotation);
if (ret) {
DRM_ERROR("Illegal rotation value %u\n", rotation);
return -EINVAL;
}
drm->mode_config.min_width = mode_copy.hdisplay;
drm->mode_config.max_width = mode_copy.hdisplay;
drm->mode_config.min_height = mode_copy.vdisplay;
drm->mode_config.max_height = mode_copy.vdisplay;
connector = tinydrm_connector_create(drm, &mode_copy, connector_type);
if (IS_ERR(connector))
return PTR_ERR(connector);
return drm_simple_display_pipe_init(drm, pipe, funcs, formats,
format_count, modifiers, connector);
}
EXPORT_SYMBOL(tinydrm_display_pipe_init);
|
