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
|
/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "hwc-resource-manager"
#include "ResourceManager.h"
#include <fcntl.h>
#include <sys/stat.h>
#include <sstream>
#include "bufferinfo/BufferInfoGetter.h"
#include "drm/DrmDevice.h"
#include "drm/DrmPlane.h"
#include "utils/log.h"
#include "utils/properties.h"
namespace android {
ResourceManager::ResourceManager() : num_displays_(0) {
}
ResourceManager::~ResourceManager() {
uevent_listener_.Exit();
}
int ResourceManager::Init() {
char path_pattern[PROPERTY_VALUE_MAX];
// Could be a valid path or it can have at the end of it the wildcard %
// which means that it will try open all devices until an error is met.
int path_len = property_get("vendor.hwc.drm.device", path_pattern,
"/dev/dri/card%");
int ret = 0;
if (path_pattern[path_len - 1] != '%') {
ret = AddDrmDevice(std::string(path_pattern));
} else {
path_pattern[path_len - 1] = '\0';
for (int idx = 0; ret == 0; ++idx) {
std::ostringstream path;
path << path_pattern << idx;
struct stat buf {};
if (stat(path.str().c_str(), &buf) != 0)
break;
if (DrmDevice::IsKMSDev(path.str().c_str()))
ret = AddDrmDevice(path.str());
}
}
if (num_displays_ == 0) {
ALOGE("Failed to initialize any displays");
return ret != 0 ? -EINVAL : ret;
}
char scale_with_gpu[PROPERTY_VALUE_MAX];
property_get("vendor.hwc.drm.scale_with_gpu", scale_with_gpu, "0");
scale_with_gpu_ = bool(strncmp(scale_with_gpu, "0", 1));
if (BufferInfoGetter::GetInstance() == nullptr) {
ALOGE("Failed to initialize BufferInfoGetter");
return -EINVAL;
}
ret = uevent_listener_.Init();
if (ret != 0) {
ALOGE("Can't initialize event listener %d", ret);
return ret;
}
return 0;
}
int ResourceManager::AddDrmDevice(const std::string &path) {
auto drm = std::make_unique<DrmDevice>();
int displays_added = 0;
int ret = 0;
std::tie(ret, displays_added) = drm->Init(path.c_str(), num_displays_);
drms_.push_back(std::move(drm));
num_displays_ += displays_added;
return ret;
}
DrmDevice *ResourceManager::GetDrmDevice(int display) {
for (auto &drm : drms_) {
if (drm->HandlesDisplay(display))
return drm.get();
}
return nullptr;
}
} // namespace android
|
