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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/ozone/platform/drm/gpu/drm_device_manager.h"
#include <algorithm>
#include <memory>
#include <utility>
#include "base/containers/contains.h"
#include "base/logging.h"
#include "ui/ozone/platform/drm/gpu/drm_device.h"
#include "ui/ozone/platform/drm/gpu/drm_device_generator.h"
namespace ui {
DrmDeviceManager::DrmDeviceManager(
std::unique_ptr<DrmDeviceGenerator> drm_device_generator)
: drm_device_generator_(std::move(drm_device_generator)) {}
DrmDeviceManager::~DrmDeviceManager() {
DCHECK(drm_device_map_.empty());
}
bool DrmDeviceManager::AddDrmDevice(const base::FilePath& path,
base::ScopedFD fd) {
if (base::Contains(devices_, path, &DrmDevice::device_path)) {
VLOG(2) << "Got request to add existing device: " << path.value();
return false;
}
scoped_refptr<DrmDevice> device = drm_device_generator_->CreateDevice(
path, std::move(fd), !primary_device_);
if (!device) {
// This is expected for non-modesetting devices like VGEM.
VLOG(1) << "Could not initialize DRM device for " << path.value();
return false;
}
if (!primary_device_) {
VLOG(1) << "Primary DRM device added: " << path;
primary_device_ = device;
}
devices_.push_back(device);
return true;
}
void DrmDeviceManager::RemoveDrmDevice(const base::FilePath& path) {
auto it = std::ranges::find(devices_, path, &DrmDevice::device_path);
if (it == devices_.end()) {
VLOG(2) << "Got request to remove non-existent device: " << path.value();
return;
}
DCHECK_NE(primary_device_, *it);
devices_.erase(it);
}
void DrmDeviceManager::UpdateDrmDevice(gfx::AcceleratedWidget widget,
const scoped_refptr<DrmDevice>& device) {
drm_device_map_[widget] = device;
}
void DrmDeviceManager::RemoveDrmDevice(gfx::AcceleratedWidget widget) {
auto it = drm_device_map_.find(widget);
if (it != drm_device_map_.end())
drm_device_map_.erase(it);
}
scoped_refptr<DrmDevice> DrmDeviceManager::GetDrmDevice(
gfx::AcceleratedWidget widget) {
if (widget == gfx::kNullAcceleratedWidget)
return primary_device_;
auto it = drm_device_map_.find(widget);
DLOG_IF(WARNING, it == drm_device_map_.end())
<< "Attempting to get device for unknown widget " << widget;
// If the widget isn't associated with a display (headless mode) we can
// allocate buffers from any controller since they will never be scanned out.
// Use the primary DRM device as a fallback when allocating these buffers.
if (it == drm_device_map_.end() || !it->second)
return primary_device_;
return it->second;
}
const DrmDeviceVector& DrmDeviceManager::GetDrmDevices() const {
return devices_;
}
} // namespace ui
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