/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "hwc-resource-manager"
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#include "resourcemanager.h"
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#include <cutils/properties.h>
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#include <log/log.h>
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#include <sstream>
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#include <string>
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namespace android {
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ResourceManager::ResourceManager() : num_displays_(0), gralloc_(NULL) {
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}
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int ResourceManager::Init() {
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char path_pattern[PROPERTY_VALUE_MAX];
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// Could be a valid path or it can have at the end of it the wildcard %
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// which means that it will try open all devices until an error is met.
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int path_len = property_get("hwc.drm.device", path_pattern, "/dev/dri/card0");
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int ret = 0;
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if (path_pattern[path_len - 1] != '%') {
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ret = AddDrmDevice(std::string(path_pattern));
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} else {
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path_pattern[path_len - 1] = '\0';
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for (int idx = 0; !ret; ++idx) {
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std::ostringstream path;
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path << path_pattern << idx;
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ret = AddDrmDevice(path.str());
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}
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}
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if (!num_displays_) {
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ALOGE("Failed to initialize any displays");
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return ret ? -EINVAL : ret;
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}
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return hw_get_module(GRALLOC_HARDWARE_MODULE_ID,
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(const hw_module_t **)&gralloc_);
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}
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int ResourceManager::AddDrmDevice(std::string path) {
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std::unique_ptr<DrmDevice> drm = std::make_unique<DrmDevice>();
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int displays_added, ret;
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std::tie(ret, displays_added) = drm->Init(path.c_str(), num_displays_);
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if (ret)
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return ret;
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std::shared_ptr<Importer> importer;
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importer.reset(Importer::CreateInstance(drm.get()));
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if (!importer) {
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ALOGE("Failed to create importer instance");
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return -ENODEV;
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}
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importers_.push_back(importer);
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drms_.push_back(std::move(drm));
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num_displays_ += displays_added;
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return ret;
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}
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DrmConnector *ResourceManager::AvailableWritebackConnector(int display) {
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DrmDevice *drm_device = GetDrmDevice(display);
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DrmConnector *writeback_conn = NULL;
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if (drm_device) {
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writeback_conn = drm_device->AvailableWritebackConnector(display);
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if (writeback_conn)
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return writeback_conn;
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}
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for (auto &drm : drms_) {
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if (drm.get() == drm_device)
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continue;
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writeback_conn = drm->AvailableWritebackConnector(display);
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if (writeback_conn)
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return writeback_conn;
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}
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return writeback_conn;
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}
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DrmDevice *ResourceManager::GetDrmDevice(int display) {
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for (auto &drm : drms_) {
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if (drm->HandlesDisplay(display))
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return drm.get();
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}
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return NULL;
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}
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std::shared_ptr<Importer> ResourceManager::GetImporter(int display) {
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for (unsigned int i = 0; i < drms_.size(); i++) {
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if (drms_[i]->HandlesDisplay(display))
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return importers_[i];
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}
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return NULL;
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}
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const gralloc_module_t *ResourceManager::gralloc() {
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return gralloc_;
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}
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} // namespace android
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