lineage-rockchip/android_external_drm_hwcomposer
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android_external_drm_hwcomp.../drm/DrmDevice.cpp
Andrew Wolfers 84892ec611 drm_hwcomposer: Cleanup includes for test target 
Change-Id: I1332873df0109347a91e729955ba5f84cf8c7fec
2025-10-02 15:06:12 +00:00

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/*
* Copyright (C) 2015 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 "drmhwc"
#include "DrmDevice.h"
#include <drm_fourcc.h>
#include <sys/mman.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <cinttypes>
#include <cstdint>
#include <string>
#include "drm/DrmAtomicStateManager.h"
#include "drm/DrmConnector.h"
#include "drm/DrmPlane.h"
#include "drm/ResourceManager.h"
#include "utils/log.h"
#include "utils/properties.h"
namespace android::drm_hwcomposer {
auto DrmDevice::CreateInstance(std::string const &path,
ResourceManager *res_man, uint32_t index)
-> std::unique_ptr<DrmDevice> {
if (!IsKMSDev(path.c_str())) {
return {};
}
auto device = std::unique_ptr<DrmDevice>(new DrmDevice(res_man, index));
if (device->Init(path.c_str()) != 0) {
return {};
}
return device;
}
DrmDevice::DrmDevice(ResourceManager *res_man, uint32_t index)
: index_in_dev_array_(index), res_man_(res_man) {
drm_fb_importer_ = std::make_unique<DrmFbImporter>(*this);
}
auto DrmDevice::Init(const char *path) -> int {
/* TODO: Use drmOpenControl here instead */
fd_ = MakeSharedFd(open(path, O_RDWR | O_CLOEXEC));
if (!fd_) {
// NOLINTNEXTLINE(concurrency-mt-unsafe): Fixme
ALOGE("Failed to open dri %s: %s", path, strerror(errno));
return -ENODEV;
}
int ret = drmSetClientCap(*GetFd(), DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
if (ret != 0) {
ALOGE("Failed to set universal plane cap %d", ret);
return ret;
}
ret = drmSetClientCap(*GetFd(), DRM_CLIENT_CAP_ATOMIC, 1);
if (ret != 0) {
ALOGE("Failed to set atomic cap %d", ret);
return ret;
}
#ifdef DRM_CLIENT_CAP_WRITEBACK_CONNECTORS
ret = drmSetClientCap(*GetFd(), DRM_CLIENT_CAP_WRITEBACK_CONNECTORS, 1);
if (ret != 0) {
ALOGI("Failed to set writeback cap %d", ret);
}
#endif
uint64_t cap_value = 0;
if (drmGetCap(*GetFd(), DRM_CAP_ADDFB2_MODIFIERS, &cap_value) != 0) {
ALOGW("drmGetCap failed. Fallback to no modifier support.");
cap_value = 0;
}
HasAddFb2ModifiersSupport_ = cap_value != 0;
uint64_t cursor_width = 0;
uint64_t cursor_height = 0;
if (drmGetCap(*GetFd(), DRM_CAP_CURSOR_WIDTH, &cursor_width) == 0 &&
drmGetCap(*GetFd(), DRM_CAP_CURSOR_HEIGHT, &cursor_height) == 0) {
cap_cursor_size_ = std::pair<uint64_t, uint64_t>(cursor_width,
cursor_height);
}
drmSetMaster(*GetFd());
if (drmIsMaster(*GetFd()) == 0) {
ALOGE("DRM/KMS master access required");
return -EACCES;
}
auto res = MakeDrmModeResUnique(*GetFd());
if (!res) {
ALOGE("Failed to get DrmDevice resources");
return -ENODEV;
}
min_resolution_ = std::pair<uint32_t, uint32_t>(res->min_width,
res->min_height);
max_resolution_ = std::pair<uint32_t, uint32_t>(res->max_width,
res->max_height);
for (int i = 0; i < res->count_crtcs; ++i) {
// NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
auto crtc = DrmCrtc::CreateInstance(*this, res->crtcs[i], i);
if (crtc) {
crtcs_.emplace_back(std::move(crtc));
}
}
for (int i = 0; i < res->count_encoders; ++i) {
// NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
auto enc = DrmEncoder::CreateInstance(*this, res->encoders[i], i);
if (enc) {
encoders_.emplace_back(std::move(enc));
}
}
for (int i = 0; i < res->count_connectors; ++i) {
// NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
auto conn = DrmConnector::CreateInstance(*this, res->connectors[i], i);
if (!conn) {
continue;
}
if (conn->IsWriteback()) {
writeback_connectors_.emplace_back(std::move(conn));
} else {
connectors_.emplace_back(std::move(conn));
}
}
auto plane_res = MakeDrmModePlaneResUnique(*GetFd());
if (!plane_res) {
ALOGE("Failed to get plane resources");
return -ENOENT;
}
for (uint32_t i = 0; i < plane_res->count_planes; ++i) {
// NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
auto plane = DrmPlane::CreateInstance(*this, plane_res->planes[i]);
if (plane) {
planes_.emplace_back(std::move(plane));
}
}
return 0;
}
auto DrmDevice::RegisterUserPropertyBlob(void *data, size_t length) const
-> DrmModeUserPropertyBlobUnique {
struct drm_mode_create_blob create_blob {};
create_blob.length = length;
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-cstyle-cast)
create_blob.data = (__u64)data;
auto ret = drmIoctl(*GetFd(), DRM_IOCTL_MODE_CREATEPROPBLOB, &create_blob);
if (ret != 0) {
ALOGE("Failed to create mode property blob %d", ret);
return {};
}
return DrmModeUserPropertyBlobUnique(
new uint32_t(create_blob.blob_id), [this](const uint32_t *it) {
struct drm_mode_destroy_blob destroy_blob {};
destroy_blob.blob_id = (__u32)*it;
auto err = drmIoctl(*GetFd(), DRM_IOCTL_MODE_DESTROYPROPBLOB,
&destroy_blob);
if (err != 0) {
ALOGE("Failed to destroy mode property blob %" PRIu32 "/%d", *it,
err);
}
// NOLINTNEXTLINE(cppcoreguidelines-owning-memory)
delete it;
});
}
int DrmDevice::GetProperty(uint32_t obj_id, uint32_t obj_type,
const char *prop_name, DrmProperty *property) const {
drmModeObjectPropertiesPtr props = nullptr;
props = drmModeObjectGetProperties(*GetFd(), obj_id, obj_type);
if (props == nullptr) {
ALOGE("Failed to get properties for %d/%x", obj_id, obj_type);
return -ENODEV;
}
bool found = false;
for (int i = 0; !found && (size_t)i < props->count_props; ++i) {
// NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
drmModePropertyPtr p = drmModeGetProperty(*GetFd(), props->props[i]);
if (strcmp(p->name, prop_name) == 0) {
// NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
property->Init(GetFd(), obj_id, p, props->prop_values[i]);
found = true;
}
drmModeFreeProperty(p);
}
drmModeFreeObjectProperties(props);
return found ? 0 : -ENOENT;
}
std::string DrmDevice::GetName() const {
auto *ver = drmGetVersion(*GetFd());
if (ver == nullptr) {
ALOGW("Failed to get drm version for fd=%d", *GetFd());
return "generic";
}
std::string name(ver->name);
drmFreeVersion(ver);
return name;
}
auto DrmDevice::IsKMSDev(const char *path) -> bool {
auto fd = MakeUniqueFd(open(path, O_RDWR | O_CLOEXEC));
if (!fd) {
return false;
}
auto res = MakeDrmModeResUnique(*fd);
if (!res) {
return false;
}
auto is_kms = res->count_crtcs > 0 && res->count_connectors > 0 &&
res->count_encoders > 0;
return is_kms;
}
auto DrmDevice::GetConnectors()
-> const std::vector<std::unique_ptr<DrmConnector>> & {
return connectors_;
}
auto DrmDevice::RefreshConnectors() -> void {
auto res = MakeDrmModeResUnique(*GetFd());
if (!res) {
ALOGE("Failed to get DrmDevice resources");
return;
}
// Remove the stale connectors present in connectors_ but not in DRM resources
std::set<uint32_t> conn_ids_present;
for (auto it = begin(connectors_); it != end(connectors_);) {
auto stale = true;
for (int i = 0; i < res->count_connectors; ++i) {
// NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
if (it->get()->GetId() == res->connectors[i]) {
stale = false;
// NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
conn_ids_present.insert(res->connectors[i]);
break;
}
}
if (stale && it->get()->GetPipeline() == nullptr) {
it = connectors_.erase(it);
} else {
ALOGE_IF(stale, "Stale connector %d %s has pipeline attached",
it->get()->GetId(), it->get()->GetName().c_str());
++it;
}
}
// Add new connectors in DRM resources that are not present in connectors_
for (int i = 0; i < res->count_connectors; ++i) {
// NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
if (conn_ids_present.count(res->connectors[i]) != 0) {
continue;
}
// NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
auto conn = DrmConnector::CreateInstance(*this, res->connectors[i], i);
if (!conn) {
continue;
}
if (!conn->IsWriteback()) {
connectors_.emplace_back(std::move(conn));
}
}
}
auto DrmDevice::ResetConnectorsAndCrtcs() -> void {
auto pset = MakeDrmModeAtomicReqUnique();
if (!pset) {
ALOGE("Failed to allocate property set");
return;
}
for (const auto &conn : connectors_) {
if (!conn->GetCrtcIdProperty().AtomicSet(*pset.get(), 0)) {
ALOGE("Failed to Set Crtc Id Prop to Null for Conn = %d", conn->GetId());
return;
}
}
for (const auto &crtc : crtcs_) {
if (!crtc->GetModeProperty().AtomicSet(*pset.get(), 0) ||
!crtc->GetActiveProperty().AtomicSet(*pset.get(), 0)) {
ALOGE(
"Failed to set Mode Property or Active Property to Null for CRTC = "
"%d",
crtc->GetId());
return;
}
}
auto err = drmModeAtomicCommit(*GetFd(), pset.get(),
DRM_MODE_ATOMIC_ALLOW_MODESET, this);
if (err != 0) {
ALOGE("Failed to commit pset ret=%d", err);
}
}
auto DrmDevice::GetPlanes() -> const std::vector<std::unique_ptr<DrmPlane>> & {
return planes_;
}
auto DrmDevice::GetCrtcs() -> const std::vector<std::unique_ptr<DrmCrtc>> & {
return crtcs_;
}
auto DrmDevice::GetEncoders()
-> const std::vector<std::unique_ptr<DrmEncoder>> & {
return encoders_;
}
class DumbBufferFd : public PrimeFdsSharedBase {
public:
SharedFd fd;
};
// NOLINTBEGIN(cppcoreguidelines-avoid-goto)
auto DrmDevice::CreateBufferForModeset(uint32_t width, uint32_t height)
-> std::optional<BufferInfo> {
constexpr uint32_t kDumbBufferFormat = DRM_FORMAT_XRGB8888;
constexpr uint32_t kDumbBufferBpp = 32;
std::optional<BufferInfo> result;
void *ptr = MAP_FAILED;
struct drm_mode_create_dumb create = {
.height = height,
.width = width,
.bpp = kDumbBufferBpp,
.flags = 0,
};
int ret = drmIoctl(*fd_, DRM_IOCTL_MODE_CREATE_DUMB, &create);
if (ret != 0) {
ALOGE("Failed to DRM_IOCTL_MODE_CREATE_DUMB %d", errno);
return {};
}
struct drm_mode_map_dumb map = {
.handle = create.handle,
};
auto dumb_buffer_fd = std::make_shared<DumbBufferFd>();
BufferInfo buffer_info = {
.width = width,
.height = height,
.format = kDumbBufferFormat,
.pitches = {create.pitch},
.prime_fds = {-1, -1, -1, -1},
.modifiers = {DRM_FORMAT_MOD_NONE},
.color_space = BufferColorSpace::kUndefined,
.sample_range = BufferSampleRange::kUndefined,
.blend_mode = BufferBlendMode::kNone,
.fds_shared = dumb_buffer_fd,
};
ret = drmIoctl(*fd_, DRM_IOCTL_MODE_MAP_DUMB, &map);
if (ret != 0) {
ALOGE("Failed to DRM_IOCTL_MODE_MAP_DUMB %d", errno);
goto done;
}
ptr = mmap(nullptr, create.size, PROT_READ | PROT_WRITE, MAP_SHARED, *fd_,
(off_t)map.offset);
if (ptr == MAP_FAILED) {
ALOGE("Failed to mmap dumb buffer %d", errno);
goto done;
}
memset(ptr, 0, create.size);
if (munmap(ptr, create.size) != 0) {
ALOGE("Failed to unmap dumb buffer: %d", errno);
}
ret = drmPrimeHandleToFD(*fd_, create.handle, 0, &buffer_info.prime_fds[0]);
if (ret != 0) {
ALOGE("Failed to export dumb buffer as FD: %d", errno);
goto done;
}
dumb_buffer_fd->fd = MakeSharedFd(buffer_info.prime_fds[0]);
result = buffer_info;
done:
if (create.handle > 0) {
struct drm_mode_destroy_dumb destroy = {
.handle = create.handle,
};
drmIoctl(*fd_, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy);
}
return result;
}
// NOLINTEND(cppcoreguidelines-avoid-goto)
} // namespace android::drm_hwcomposer
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