1 /*
2 * Copyright (C) 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #if __ANDROID_API__ >= 30
18
19 #define LOG_TAG "drmhwc"
20
21 #include "BufferInfoMapperMetadata.h"
22
23 #include <drm/drm_fourcc.h>
24 #include <ui/GraphicBufferMapper.h>
25 #include <xf86drm.h>
26 #include <xf86drmMode.h>
27
28 #include <cinttypes>
29
30 #include "utils/log.h"
31
32 namespace android {
33
CreateInstance()34 BufferInfoGetter *BufferInfoMapperMetadata::CreateInstance() {
35 if (GraphicBufferMapper::getInstance().getMapperVersion() <
36 GraphicBufferMapper::GRALLOC_4)
37 return nullptr;
38
39 return new BufferInfoMapperMetadata();
40 }
41
42 /* The implementation below makes assumptions on the order and number of file
43 * descriptors that Gralloc places in the native_handle_t and as such it very
44 * likely needs to be adapted to match the particular Gralloc implementation
45 * used in the system. For this reason it is been declared as a weak symbol,
46 * so that it can be overridden.
47 */
48 int __attribute__((weak))
GetFds(buffer_handle_t handle,BufferInfo * bo)49 BufferInfoMapperMetadata::GetFds(buffer_handle_t handle, BufferInfo *bo) {
50 int fd_index = 0;
51
52 if (handle->numFds <= 0) {
53 ALOGE("Handle has no fds");
54 return android::BAD_VALUE;
55 }
56
57 for (int i = 0; i < kBufferMaxPlanes; i++) {
58 /* If no size, we're out of usable planes */
59 if (bo->sizes[i] <= 0) {
60 if (i == 0) {
61 ALOGE("Bad handle metadata");
62 return android::BAD_VALUE;
63 }
64 break;
65 }
66
67 /*
68 * If the offset is zero, its multi-buffer
69 * so move to the next fd
70 */
71 if (i != 0 && bo->offsets[i] == 0) {
72 fd_index++;
73 if (fd_index >= handle->numFds) {
74 ALOGE("Handle has no more fds");
75 return android::BAD_VALUE;
76 }
77 }
78
79 bo->prime_fds[i] = handle->data[fd_index];
80 if (bo->prime_fds[i] <= 0) {
81 ALOGE("Invalid prime fd");
82 return android::BAD_VALUE;
83 }
84 }
85
86 return 0;
87 }
88
GetBoInfo(buffer_handle_t handle)89 auto BufferInfoMapperMetadata::GetBoInfo(buffer_handle_t handle)
90 -> std::optional<BufferInfo> {
91 GraphicBufferMapper &mapper = GraphicBufferMapper::getInstance();
92 if (handle == nullptr)
93 return {};
94
95 BufferInfo bi{};
96
97 int err = mapper.getPixelFormatFourCC(handle, &bi.format);
98 if (err != 0) {
99 ALOGE("Failed to get FourCC format err=%d", err);
100 return {};
101 }
102
103 err = mapper.getPixelFormatModifier(handle, &bi.modifiers[0]);
104 if (err != 0) {
105 ALOGE("Failed to get DRM Modifier err=%d", err);
106 return {};
107 }
108
109 uint64_t width = 0;
110 err = mapper.getWidth(handle, &width);
111 if (err != 0) {
112 ALOGE("Failed to get Width err=%d", err);
113 return {};
114 }
115 bi.width = static_cast<uint32_t>(width);
116
117 uint64_t height = 0;
118 err = mapper.getHeight(handle, &height);
119 if (err != 0) {
120 ALOGE("Failed to get Height err=%d", err);
121 return {};
122 }
123 bi.height = static_cast<uint32_t>(height);
124
125 std::vector<ui::PlaneLayout> layouts;
126 err = mapper.getPlaneLayouts(handle, &layouts);
127 if (err != 0) {
128 ALOGE("Failed to get Plane Layouts err=%d", err);
129 return {};
130 }
131
132 for (uint32_t i = 0; i < layouts.size(); i++) {
133 bi.modifiers[i] = bi.modifiers[0];
134 bi.pitches[i] = layouts[i].strideInBytes;
135 bi.offsets[i] = layouts[i].offsetInBytes;
136 bi.sizes[i] = layouts[i].totalSizeInBytes;
137 }
138
139 err = GetFds(handle, &bi);
140 if (err != 0) {
141 ALOGE("Failed to get fds (err=%d)", err);
142 return {};
143 }
144
145 return bi;
146 }
147
148 } // namespace android
149
150 #endif
151