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
|
mod utils;
use crate::utils::*;
use drm::control::Device as ControlDevice;
use drm::Device as BasicDevice;
use drm::buffer::DrmFourcc;
use drm::control::{self, atomic, connector, crtc, property, AtomicCommitFlags};
pub fn main() {
let card = Card::open_global();
card.set_client_capability(drm::ClientCapability::UniversalPlanes, true)
.expect("Unable to request UniversalPlanes capability");
card.set_client_capability(drm::ClientCapability::Atomic, true)
.expect("Unable to request Atomic capability");
// Load the information.
let res = card
.resource_handles()
.expect("Could not load normal resource ids.");
let coninfo: Vec<connector::Info> = res
.connectors()
.iter()
.flat_map(|con| card.get_connector(*con, true))
.collect();
let crtcinfo: Vec<crtc::Info> = res
.crtcs()
.iter()
.flat_map(|crtc| card.get_crtc(*crtc))
.collect();
// Filter each connector until we find one that's connected.
let con = coninfo
.iter()
.find(|&i| i.state() == connector::State::Connected)
.expect("No connected connectors");
// Get the first (usually best) mode
let &mode = con.modes().first().expect("No modes found on connector");
let (disp_width, disp_height) = mode.size();
// Find a crtc and FB
let crtc = crtcinfo.first().expect("No crtcs found");
// Select the pixel format
let fmt = DrmFourcc::Xrgb8888;
// Create a DB
// If buffer resolution is above display resolution, a ENOSPC (not enough GPU memory) error may
// occur
let mut db = card
.create_dumb_buffer((disp_width.into(), disp_height.into()), fmt, 32)
.expect("Could not create dumb buffer");
// Map it and grey it out.
{
let mut map = card
.map_dumb_buffer(&mut db)
.expect("Could not map dumbbuffer");
for b in map.as_mut() {
*b = 128;
}
}
// Create an FB:
let fb = card
.add_framebuffer(&db, 24, 32)
.expect("Could not create FB");
let planes = card.plane_handles().expect("Could not list planes");
let (better_planes, compatible_planes): (
Vec<control::plane::Handle>,
Vec<control::plane::Handle>,
) = planes
.iter()
.filter(|&&plane| {
card.get_plane(plane)
.map(|plane_info| {
let compatible_crtcs = res.filter_crtcs(plane_info.possible_crtcs());
compatible_crtcs.contains(&crtc.handle())
})
.unwrap_or(false)
})
.partition(|&&plane| {
if let Ok(props) = card.get_properties(plane) {
for (&id, &val) in props.iter() {
if let Ok(info) = card.get_property(id) {
if info.name().to_str().map(|x| x == "type").unwrap_or(false) {
return val == (drm::control::PlaneType::Primary as u32).into();
}
}
}
}
false
});
let plane = *better_planes.first().unwrap_or(&compatible_planes[0]);
println!("{:#?}", mode);
println!("{:#?}", fb);
println!("{:#?}", db);
println!("{:#?}", plane);
let con_props = card
.get_properties(con.handle())
.expect("Could not get props of connector")
.as_hashmap(&card)
.expect("Could not get a prop from connector");
let crtc_props = card
.get_properties(crtc.handle())
.expect("Could not get props of crtc")
.as_hashmap(&card)
.expect("Could not get a prop from crtc");
let plane_props = card
.get_properties(plane)
.expect("Could not get props of plane")
.as_hashmap(&card)
.expect("Could not get a prop from plane");
let mut atomic_req = atomic::AtomicModeReq::new();
atomic_req.add_property(
con.handle(),
con_props["CRTC_ID"].handle(),
property::Value::CRTC(Some(crtc.handle())),
);
let blob = card
.create_property_blob(&mode)
.expect("Failed to create blob");
atomic_req.add_property(crtc.handle(), crtc_props["MODE_ID"].handle(), blob);
atomic_req.add_property(
crtc.handle(),
crtc_props["ACTIVE"].handle(),
property::Value::Boolean(true),
);
atomic_req.add_property(
plane,
plane_props["FB_ID"].handle(),
property::Value::Framebuffer(Some(fb)),
);
atomic_req.add_property(
plane,
plane_props["CRTC_ID"].handle(),
property::Value::CRTC(Some(crtc.handle())),
);
atomic_req.add_property(
plane,
plane_props["SRC_X"].handle(),
property::Value::UnsignedRange(0),
);
atomic_req.add_property(
plane,
plane_props["SRC_Y"].handle(),
property::Value::UnsignedRange(0),
);
atomic_req.add_property(
plane,
plane_props["SRC_W"].handle(),
property::Value::UnsignedRange((mode.size().0 as u64) << 16),
);
atomic_req.add_property(
plane,
plane_props["SRC_H"].handle(),
property::Value::UnsignedRange((mode.size().1 as u64) << 16),
);
atomic_req.add_property(
plane,
plane_props["CRTC_X"].handle(),
property::Value::SignedRange(0),
);
atomic_req.add_property(
plane,
plane_props["CRTC_Y"].handle(),
property::Value::SignedRange(0),
);
atomic_req.add_property(
plane,
plane_props["CRTC_W"].handle(),
property::Value::UnsignedRange(mode.size().0 as u64),
);
atomic_req.add_property(
plane,
plane_props["CRTC_H"].handle(),
property::Value::UnsignedRange(mode.size().1 as u64),
);
// Set the crtc
// On many setups, this requires root access.
card.atomic_commit(AtomicCommitFlags::ALLOW_MODESET, atomic_req)
.expect("Failed to set mode");
let five_seconds = ::std::time::Duration::from_millis(5000);
::std::thread::sleep(five_seconds);
card.destroy_framebuffer(fb).unwrap();
card.destroy_dumb_buffer(db).unwrap();
}
|
