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 #define LOG_TAG "hwc-platform-drm-generic"
18
19 #include "DrmGenericImporter.h"
20
21 #include <cutils/properties.h>
22 #include <gralloc_handle.h>
23 #include <hardware/gralloc.h>
24 #include <inttypes.h>
25 #include <log/log.h>
26 #include <xf86drm.h>
27 #include <xf86drmMode.h>
28
29 namespace android {
30
DrmGenericImporter(DrmDevice * drm)31 DrmGenericImporter::DrmGenericImporter(DrmDevice *drm) : drm_(drm) {
32 uint64_t cap_value = 0;
33 if (drmGetCap(drm_->fd(), DRM_CAP_ADDFB2_MODIFIERS, &cap_value)) {
34 ALOGE("drmGetCap failed. Fallback to no modifier support.");
35 cap_value = 0;
36 }
37 has_modifier_support_ = cap_value;
38 }
39
~DrmGenericImporter()40 DrmGenericImporter::~DrmGenericImporter() {
41 }
42
ImportBuffer(hwc_drm_bo_t * bo)43 int DrmGenericImporter::ImportBuffer(hwc_drm_bo_t *bo) {
44 int ret = drmPrimeFDToHandle(drm_->fd(), bo->prime_fds[0],
45 &bo->gem_handles[0]);
46 if (ret) {
47 ALOGE("failed to import prime fd %d ret=%d", bo->prime_fds[0], ret);
48 return ret;
49 }
50
51 for (int i = 1; i < HWC_DRM_BO_MAX_PLANES; i++) {
52 int fd = bo->prime_fds[i];
53 if (fd != 0) {
54 if (fd != bo->prime_fds[0]) {
55 ALOGE("Multiplanar FBs are not supported by this version of composer");
56 return -ENOTSUP;
57 }
58 bo->gem_handles[i] = bo->gem_handles[0];
59 }
60 }
61
62 if (!has_modifier_support_ && bo->modifiers[0]) {
63 ALOGE("No ADDFB2 with modifier support. Can't import modifier %" PRIu64,
64 bo->modifiers[0]);
65 return -EINVAL;
66 }
67
68 if (!bo->with_modifiers)
69 ret = drmModeAddFB2(drm_->fd(), bo->width, bo->height, bo->format,
70 bo->gem_handles, bo->pitches, bo->offsets, &bo->fb_id,
71 0);
72 else
73 ret = drmModeAddFB2WithModifiers(drm_->fd(), bo->width, bo->height,
74 bo->format, bo->gem_handles, bo->pitches,
75 bo->offsets, bo->modifiers, &bo->fb_id,
76 bo->modifiers[0] ? DRM_MODE_FB_MODIFIERS
77 : 0);
78
79 if (ret) {
80 ALOGE("could not create drm fb %d", ret);
81 return ret;
82 }
83
84 ImportHandle(bo->gem_handles[0]);
85
86 return ret;
87 }
88
ReleaseBuffer(hwc_drm_bo_t * bo)89 int DrmGenericImporter::ReleaseBuffer(hwc_drm_bo_t *bo) {
90 if (bo->fb_id)
91 if (drmModeRmFB(drm_->fd(), bo->fb_id))
92 ALOGE("Failed to rm fb");
93
94 for (int i = 0; i < HWC_DRM_BO_MAX_PLANES; i++) {
95 if (!bo->gem_handles[i])
96 continue;
97
98 if (ReleaseHandle(bo->gem_handles[i])) {
99 ALOGE("Failed to release gem handle %d", bo->gem_handles[i]);
100 } else {
101 for (int j = i + 1; j < HWC_DRM_BO_MAX_PLANES; j++)
102 if (bo->gem_handles[j] == bo->gem_handles[i])
103 bo->gem_handles[j] = 0;
104 bo->gem_handles[i] = 0;
105 }
106 }
107 return 0;
108 }
109
ImportHandle(uint32_t gem_handle)110 int DrmGenericImporter::ImportHandle(uint32_t gem_handle) {
111 gem_refcount_[gem_handle]++;
112
113 return 0;
114 }
115
ReleaseHandle(uint32_t gem_handle)116 int DrmGenericImporter::ReleaseHandle(uint32_t gem_handle) {
117 if (--gem_refcount_[gem_handle])
118 return 0;
119
120 gem_refcount_.erase(gem_handle);
121
122 return CloseHandle(gem_handle);
123 }
124
CloseHandle(uint32_t gem_handle)125 int DrmGenericImporter::CloseHandle(uint32_t gem_handle) {
126 struct drm_gem_close gem_close;
127
128 memset(&gem_close, 0, sizeof(gem_close));
129
130 gem_close.handle = gem_handle;
131 int ret = drmIoctl(drm_->fd(), DRM_IOCTL_GEM_CLOSE, &gem_close);
132 if (ret)
133 ALOGE("Failed to close gem handle %d %d", gem_handle, ret);
134
135 return ret;
136 }
137 } // namespace android
138